( 1 2 ) United S ta tes Pa tent

Hui
US 00749541 4B2
US 7, 495, 41 4 B2
F eb . 2 4, 2 009
( 1 0) Pa tent N 0. :
( 45) Da te o f Pa tent:
( 54)
( 75)
( 73 )
( 2 1 )
( 2 2 )
( 6 5)
( 6 3 )
( 51 )
( 52 )
( 58 )
( 56 )
RECHARGEABLEBATTERY CIRCUIT AN D
S TRUCTUREF ORCOMPATIBILITY WITH A
PLAN ARIN DUCTIVECHARGIN G
PLATF ORM
Inv ento r : Ro n S h u- y uen Hui, S h a tin ( CN )
Co nv enient Po wer Lim ited, Centr a l
( HK )
As s ig nee:
N o tic e: S ub j ec t to a ny dis c l a im er , th e ter m o f th is
p a tent is ex tended o r a dj us ted under 3 5
U. S . C. 1 54( b ) b y 0 da y s .
Ap p l . N 0. : 1 1 / 2 3 4, 045
F il ed: S ep . 2 3 , 2 005
Pr io r Pub l ic a tio n Da ta
US 2 007/ 002 996 5 A1 F eb . 8 , 2 007
Rel a ted US . Ap p l ic a tio n Da ta
Co ntinua tio n- in- p a r t o f a p p l ic a tio n N o . 1 1 / 1 8 9, 097,
?l ed o n J ul . 2 5, 2 005.
Int. Cl .
H02 ] 7/ 00 ( 2 006 . 01 )
US . Cl . . . . . . . . . . . . . . . . . . . . . . . . 3 2 0/ 1 08 ; 1 07/ 1 1 3 ; 1 07/ 1 1 5;
1 07/ 1 1 4;1 07/ 1 1 2
F iel d o f Cl a s s i?c a tio n S ea r c h . . . . . . . . . . . . . . . . . 3 2 0/ 1 08 ;
3 3 6 / 1 1 7
S ee a p p l ic a tio n ?l e f o r c o m p l ete s ea r c h h is to r y .
Ref er enc es Cited
U. S . PATEN T DOCUMEN TS
6 , 01 6 , 046 A * 1 / 2 000 K a ite et a l . . . . . . . . . . . . . . . . . . 3 2 0/ 1 08
6 , 1 40, 902 A * 1 0/ 2 000 Ya m a s a wa et a 1 . 3 3 6 / 8 3
6 , 501 , 3 6 4 B1 1 2 / 2 002 Hui et a 1 . . . . . . . . . . . . . . . . . . 3 3 6 / 2 00
2 002 / 008 93 05 A1 * 7/ 2 002 Pa r k et a l . 3 2 0/ 1 08
2 002 / 01 1 001 3 A1 8 / 2 002 Pa r keta l . 3 6 3 / 1 53
2 003 / 01 51 93 0 A1 * 8 / 2 003 Ber g h eg g er . . . . 3 6 3 / 2 1 02
2 003 / 02 1 01 06 A1 * 1 1 / 2 003 Ch eng et a 1 . . . . . . . . . . . . . . . 3 3 3 / 2 4R
2 003 / 02 1 48 2 1 A1 * 1 1 / 2 003 Gia nno p o ul o s eta l . . . 3 6 3 / 2 1 02
( Co ntinued)
F OREIGN PATEN T DOCUMEN TS
CN 2 458 08 1 / 1 997
( Co ntinued)
OTHERPUBLICATION S
Ta ng , S . C. ; Ch ung , H. , Co r el es s p r inted- c ir c uit b o a r d tr a ns f o r m er s
f o r s ig na l a nd ener g y tr a ns f er , El ec tr o nic s Letter s , v o l . 3 4 Is s ue: 1 1 ,
Ma y 2 8 , 1 998 , p p . 1 052 - 1 054.
( Co ntinued)
Pr im a r y Ex a m iner iEdWa r d Ts o
As s is ta nt Ex a m iner iAl ex is Bo a teng
( 74) Atto r ney , Ag ent, o r F ir m iHes l in Ro th enb er g F a r l ey &
Mes iti RC.
( 57) ABS TRACT
Ab a tter y p a c k f o r a n el ec tr o nic dev ic e c o m p r is es b a tter y
c el l s , a b a tter y c h a r g ing c ir c uit, a nd a n ener g y r ec eiv ing el e
m ent a da p ted to r ec eiv e p o Wer f r o m a p l a na r induc tiv e c h a r g
ing s y s tem . Th e ener g y r ec eiv ing el em ent h a s a n induc ta nc e
a nd a c a p a c ito r is c o nnec ted to th e ener g y r ec eiv ing el em ent
a nd f o r m s a r es o na nt ta nk th er ewith . Adio de r ec ti?er a nd a
DCc a p a c ito r a r e c o nnec ted to th e ener g y r ec eiv ing el em ent
to p r o v ide a r ec ti?ed DCv o l ta g e th a t c a n b e f ed f r o m th e
ener g y r ec eiv ing el em ent to s a id b a tter y c h a r g ing c ir c uit. Th e
ener g y r ec eiv ing el em ent m a y c o m p r is e a s o f t m a g netic s h eet
With a c o il Wo und a r o und its edg es , o r a c o il f o r m ed o n a
p r inted c ir c uit b o a r d, o r a c o m b ina tio n o f th e tWo . Th e ener g y
r ec eiv ing el em ent m a y b e f o r m ed integ r a l l y With th e b a tter y
p a c k, o r m a y b e p r o v ided a s a s ep a r a te c o m p o nent th a t c a n b e
a dded to a n ex is ting b a tter y .
3 3 Cl a im s , 1 3 Dr a wing S h eets
US 7, 495, 41 4 B2
Pa g e 2
US . PATEN T DOCUMEN TS
2 005/ 001 76 77 A1 * 1 / 2 005 Bur to n et a l . . . . . . . . . . . . . . . . 3 2 0/ 1 08
2 005/ 01 4048 2 A1 * 6 / 2 005 Ch eng et a 1 . 3 3 6 / 1 8 0
2 006 / 006 1 3 2 6 A1 * 3 / 2 006 Vine et a l . . . . . . . . . . . . . . . . . . . 3 2 0/ 1 08
F OREIGN PATEN T DOCUMEN TS
CN 1 3 6 940 A 8 / 2 002
EP 093 52 6 3 8 / 1 999
F R 2 796 2 1 6 1 / 2 001
GB 2 3 99 2 2 5 A 9/ 2 004
J P 1 0- 7508 5 3 / 1 998
J P 1 1 - 1 6 756 1 / 1 999
W0 W0 03 / 1 053 08 A1 1 2 / 2 003
OTHERPUBLICATION S
Hui, S . Y. R. ; Henr y S h u- Hung Ch ung ; Ta ng , S . C. , Co r el es s p r inted
c ir c uit b o a r d ( PCB) tr a ns f o r m er s f o r p o wer MOS F ET/ IGBT g a te
dr iv e c ir c uits , IEEE Tr a ns a c tio ns o n Po wer El ec tr o nic s , v o l . 1 4
Is s ue: 3 , Ma y 1 999, p p . 42 2 - 43 0.
Ta ng , S . C. ; Hui, S . Y. R. ; Henr y S h u- Hung Ch ung , Co r el es s p r inted
c ir c uit b o a r d ( PCB) tr a ns f o r m er s with m ul tip l e s ec o nda r y winding s
f o r c o m p l em enta r y g a te dr iv e c ir c uits , IEEETr a ns a c tio ns o n Po wer
El ec tr o nic s , v o l . 1 4, Is s ue: 3 , Ma y 1 999, p p . 43 1 - 43 7.
Hui, S . Y. R. ; Ta ng , S . C. ; Henr y S h u- Hung Ch ung , Op tim a l o p er a
tio n o f c o r el es s PCB tr a ns f o r m er - is o l a ted g a te dr iv e c ir c uits with
wide s witc h ing f r eq uenc y r a ng e, IEEETr a ns a c tio ns o n Po wer El ec
tr o nic s , v o l . 1 4 Is s ue: 3 , Ma y 1 999, p p . 506 - 51 4.
Ta ng , S . C. ; Hui, S . Y. R. ; Henr y S h u- Hung Ch ung , Co r el es s p l a na r
p r inted- c ir c uit- b o a r d ( PCB) tr a ns f o r m er s ia f unda m enta l c o nc ep t
f o r s ig na l a nd ener g y tr a ns f er , IEEE Tr a ns a c tio ns o n Po wer El ec
tr o nic s , v o l . 1 5 Is s ue: 5, S ep . 2 000, p p . 93 1 - 941 .
Ch o i B. , N h o 1 . , Ch a H. a nd Ch o i S . : , Des ig n a nd im p l em enta tio n o f
l o w- p r o ?l e c o nta c tl es s b a tter y c h a r g er us ing p l a na r p r inted c ir c uit
b o a r d winding s a s ener g y tr a ns f er dev ic e, IEEE Tr a ns a c tio ns o n
Indus tr ia l El ec tr o nic s , v o l . 51 , N o . 1 , F eb . 2 004, p p . 1 40- 1 47.
* c ited b y ex a m iner
US . Pa tent F eb . 2 4, 2 009 S h eet 1 0f 1 3 US 7, 495, 41 4 B2
1 02
PRIOR
F IG. 1 ( b ) ART
2 04
A/ /
2 00
PRIOR
ART
F IG. 2
US . Pa tent F eb . 2 4, 2 009 S h eet 2 0f 1 3 US 7, 495, 41 4 B2
3 00 3 02
Pr im a r y S ec o nda r y PRIOR
ART
F IG. 3
400
402
l PRIOR
, 1 ART
F IG. 4( a )
Ba tter y p a c k
_________ 3 : 402
m / ____/
5/ D kt . t \ 400
es - o p uni c ]:
/ PRIOR
Ba tter y c h a r g ing c ir c uit ART
F IG. 4( b )
US . Pa tent F eb . 2 4, 2 009 S h eet 3 0f 1 3 US 7, 495, 41 4 B2
r . . .
E Des k- to p unit S ec o nda r y s ide :
I
I "1 Q 1 1 . n s v g g ding |
| 71 : ' P/ :
I I Ba tter y l |
' g : I a n: c h a r g ing "" i
l l : c ir c uit 1 |
| I
I F 3 02 TR t Co ntr o l :
I l l c ir c uit ' I
L_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _. _ J l _ _ _ _ _ _ _ _ _ _ _ _ . _ _, _ _. _. l
PRIOR
F IGS ART
! / 6 ) 00
DC+
a c - - AC- DC I
m a ins Po wer C 6 02 1 1 0' __ c o nv er ter C _\\
2 40V DC- 6 00
F IG. 6
700
PRIQ R
ART
US . Pa tent F eb . 2 4, 2 009 S h eet 4 0f 1 3 US 7, 495, 41 4 B2
700
L 702 \- 70s PR| OR
ART
F IGS
900
902 906 , J
OUT+
N i- > - Ch a r g ing & 5
Pr o tec tio n PRIOR
Cir c uit 1 ART
IN o ur - 704
904 908
F IG. 9
3 00
5 DC+ 51 N + OUT+ Ac 5- AC' DC j ; Ch a r g ing & - __J _ 5
m a ins l p o wer ii Pr o tec tio n :
: Co nv er ter : : Cir c uit i
1 b a tter y 2
; DC- : ; IN ~ OUT- 5
Po wer a da p to r Ba tter y p a c k ins ide a n
el ec tr o nic eq uip m ent
PRIOR
F IG. 1 O ART
US . Pa tent F eb . 2 4, 2 009 S h eet 5 0f 1 3 US 7, 495, 41 4 B2
F IG. 1 1 ( a )
F IG. 1 1 ( b )
US . Pa tent F eb . 2 4, 2 009 S h eet 6 0f 1 3 US 7, 495, 41 4 B2
1 2 1 2
1 2 00
1 2 02
1 2 04
1 2 07
1 2 08
F IG. 1 2 ( a )
1 2 1
F IG. 1 2 ( b )
US . Pa tent F eb . 2 4, 2 009 S h eet 7 0f 1 3 US 7, 495, 41 4 B2
1 3 00
1 3 06 1 3 1 0 ' J
\ 1 REC+
* \ Vo l ta g e O
J r eg ul a to r
1 3 02 \ REC
1 3 08
F IG. 1 3 ( a )
1 3 04
1 3 1 1
REC+
S e_c o r _\da r y Cr _L_ Vo l ta g e O
Wm dm g Lr ' " Cdc r eg ul a to r
with a th in s o ? @
m a g netic s h eet
a s c o r e L__I REC
Res o na nt D. d
ta nk [ 0- e
r ec tl ?er
F K 1 1 3 ( b )
1 3 1 2
REC+
S ec o nda r y Cr Cdc O
winding Lr Vo l ta g e
with a th in s o f t Cdc r eg ul a to r
m a g netic s h eet T
a s c o r e I ' 1
Res o na nt Dio de REC
ta nk r ec ti?er
with v o l ta g e
do ub l ing
F IG. 1 3 ( c )
US . Pa tent F eb . 2 4, 2 009 S h eet 1 0 0f 1 3 US 7, 495, 41 4 B2
1 6 08
/
/ 7
1 6 04
1 6 02
1 6 06 / y
r }, / _J l
3 6 p { : 3 GD. 1 6 00
[ 3 D E]
1 6 1 0
F IG. 1 6
US . Pa tent F eb . 2 4, 2 009 S h eet 1 1 0f 1 3 US 7, 495, 41 4 B2
1 6 08
/ /
1 6 04
1 6 1 0 1 6 02
S UQ UUQ "
U ' U E] 1 6 00
F IG. 1 7( a )
1 6 08
/ /
1 6 04
1 6 02
1 6 1 0
1 6 00
[ j u I:
F IG. 1 7( b )
1 700
US . Pa tent F eb . 2 4, 2 009 S h eet 1 2 0f 1 3 US 7, 495, 41 4 B2
F IG. 1 8
US . Pa tent F eb . 2 4, 2 009 S h eet 1 3 0f 1 3 US 7, 495, 41 4 B2
1 900
I 1
DCIink v o l ta g e Vo l ta g e r eg ul a to r
is ty p ic a l l y in th e E ' - - - - - - - - - - - - - - - - - . . "I
r a ng e o f 1 0V to 3 0V - I *1 ) c h a t I I
g : 2 k % Pr o l eg tl a o g n |
Cir c uit
50HzAC- DC "' DC- AC h ig h - _ I """"""""" ' " "
p o wer f r eq uenc y ?
c o nv er ter +__ inv er ter _
' - - - - - - _. _ ____ _ __ _ __: b a tter y
F IG. 1 9
US 7, 495, 41 4 B2
1
RECHARGEABLEBATTERY CIRCUIT AN D
S TRUCTUREF ORCOMPATIBILITY WITH A
PLAN ARIN DUCTIVECHARGIN G
PLATF ORM
CROS S - REF EREN CETORELATED
APPLICATION S
Th is a p p l ic a tio n is a c o ntinua tio n- in- p a r t o f US . p a tent
a p p l ic a tio n S er . N o . 1 1 / 1 8 9, 097, ?l ed J ul . 2 5, 2 005, Wh ic h is
h er eb y inc o r p o r a ted h er ein b y r ef er enc e in its entir ety .
F IELD OF THEIN VEN TION
Th is inv entio n r el a tes to r ec h a r g ea b l e b a tter ies f o r us e in
p o r ta b l e el ec tr o nic dev ic es , a nd in p a r tic ul a r to a b a tter y
c ir c uit a nd s tr uc tur e f o r us e in a dev ic e intended to b e us ed
With a p l a na r induc tiv e c h a r g ing p l a tf o r m .
BACK GROUN D OF THEIN VEN TION
Po r ta b l e el ec tr o nic eq uip m ent s uc h a s m o b il e p h o nes a nd
p er s o na l dig ita l a s s is ta nts ( PDA) us ua l l y us e r ec h a r g ea b l e
b a tter ies . Po Wer a da p to r s ( o r AC- DCp o Wer c o nv er ter s ) a r e
tr a ditio na l l y us ed to c h a r g e th e b a tter ies in th e el ec tr o nic
eq uip m ent. Due to th e Wide r a ng e o f p o r ta b l e el ec tr o nic p r o d
uc ts , m a ny p eo p l e no Wa da y s h a v e a Wide r a ng e o f p o Wer
a da p to r s b ec a us e th er e is no s ta nda r d f o r c h a r g ing dif f er ent
ty p es o f p o r ta b l e el ec tr o nic eq uip m ent.
Rec entl y , tWo p r o p o s a l s f o r p l a na r induc tiv e c h a r g ing p l a t
f o r m s h a v e b een p r o p o s ed. Th e ?r s t o ne 1 00 p r o p o s ed in
p a tent a p p l ic a tio n GB2 3 992 2 5A g ener a tes a n AC el ec tr o
m a g netic ?ux With th e ?ux l ines 1 02 ?o Wing h o r izo nta l l y
a l o ng th e c h a r g ing s ur f a c es 1 02 a s s h o Wn in F IG. 1 a . A
dis tr ib uted Winding is us ed in th is c h a r g ing p l a tf o r m f o r g en
er a ting th e AC?ux . Th is p r inc ip l e is in f a c t s im il a r to th e AC
el ec tr o m a g netic ?ux g ener a ted in a c y l indr ic a l m o to r , ex c ep t
th a t th e c y l indr ic a l s tr uc tur e is c o m p r es s ed into a ?a t p a nc a ke
s h a p e. As th e ?ux needs to Ho w h o r iZ o nta l l y a l o ng th e up p er
a nd l o Wer s ur f a c es , tWo inh er ent l im ita tio ns a r is e. F ir s tl y , a n
el ec tr o m a g netic ?ux g uide m us t b e us ed to g uide th e ?ux
a l o ng th e b o tto m s ur f a c e. Th is is us ua l l y a l a y er o f s o f t m a g
netic m a ter ia l s uc h a s f er r ite o r a m o r p h o us a l l o y . In o r der to
p r o v ide s u?ic ient ?ux , th is l a y er m us t b e th ic k eno ug h s o
th a t th e ?ux c a n p a s s a l o ng th e l a y er o f s o f t m a g netic m a ter ia l
With o ut m a g netic s a tur a tio n. S ec o ndl y , a s im il a r p r o b l em
a p p l ies to th e s ec o nda r y dev ic e th a t h a s to p ic k up ?ux ( a nd
ener g y ) o n th e up p er s ur f a c e o f th e c h a r g ing p l a tf o r m . F IG. 1 b
s h o Ws th e dev ic e r eq uir ed f o r th e c h a r g ing p l a tf o r m o f F IG.
1 a . It c o ns is ts o f a m a g netic c o r e 1 04 a nd a Winding 1 06 . In
o r der f o r th e Winding to s ens e th e AC?ux , th e ?ux m us t ?o W
into th e c r o s s - s ec tio na l a r ea 1 08 . Th er ef o r e, th is c r o s s - s ec
tio na l a r ea m us t b e l a r g e eno ug h s o th a t eno ug h ?ux a nd
ener g y c a n b e p ic ked up b y th e s ec o nda r y dev ic e. It s h o ul d b e
no ted th a t th is s ec o nda r y dev ic e m us t b e h o us ed ins ide th e
el ec tr o nic eq uip m ent to b e c h a r g ed o n th e c h a r g ing p l a tf o r m .
Th e th ic knes s o f th e s ec o nda r y dev ic e is c r uc ia l to th e a p p l i
c a b il ity a nd p r a c tic a l ity o f th e dev ic e. If it is to o th ic k, it
s im p l y c a nno t b e h o us ed in th e el ec tr o nic eq uip m ent.
Ano th er p l a na r induc tiv e b a tter y c h a r g ing p l a tf o r m Wa s
p r o p o s ed in WO03 / 1 053 08 . Unl ike GB2 3 992 2 5A, th e c h a r g
ing p l a tf o r m 2 00 p r o p o s ed in WO03 / 1 053 08 us es a m ul ti
l a y er p l a na r Winding a r r a y to g ener a te a n AC ?ux th a t h a s
a l m o s t unif o r m m a g nitude o v er th e entir e c h a r g ing s ur f a c e.
Th e l ines o f ?ux 2 04 o f th is c h a r g ing p l a tf o r m ?o W p er p en
dic ul a r l y in a nd o ut o f th e c h a r g ing s ur f a c es ( F IG. 2 ) . Th is
p er p endic ul a r Ho w o f ?ux is v er y b ene?c ia l b ec a us e it a l l o Ws
2 0
2 5
3 0
3 5
40
45
50
55
6 0
6 5
2
th e ener g y tr a ns f er o v er th e s ur f a c e o n Wh ic h th e el ec tr o nic
eq uip m ent ( to b e c h a r g ed) is p l a c ed.
F o r b o th p l a na r c h a r g ing p l a tf o r m s des c r ib ed a b o v e, it is
nec es s a r y to us e a n el ec tr o m a g netic s h iel d o n th e b o tto m
s ur f a c e. If th e c h a r g ing p l a tf o r m is p l a c ed o n a m eta l l ic des k,
th e AC?ux g ener a ted in th e c h a r g ing p l a tf o r m m a y induc e
c ur r ents in th e m eta l l ic des k, r es ul ting in inc o r r ec t ener g y
tr a ns f er a nd ev en h ea ting ef f ec ts in th e m eta l l ic des k. US .
Pa t. N o . 6 , 501 , 3 6 4 des c r ib es a n ef f ec tiv e el ec tr o m a g netic
s h iel d f o r th is ty p e o f p l a na r c h a r g ing p l a tf o r m . Th e el ec tr o
m a g netic s h iel d o f U. S . Pa t. N o . 6 , 501 , 3 6 4 s im p l y c o ns is ts o f
a th in l a y er o f s o f t m a g netic m a ter ia l ( s uc h a s f er r ite) a nd a
th in l a y er o f c o nduc tiv e m a ter ia l ( s uc h a s c o p p er ) .
Reg a r ding ener g y tr a ns f er f r o m th e p l a na r s ur f a c e, o ne
c o r el es s p r inted- c ir c uit- b o a r d ( PCB) tr a ns f o r m er tec h no l o g y
p io neer ed b y Hui a nd Ta ng h a s b een p r o v en to b e a n ef f ec tiv e
tec h niq ue ( s ee f o r ex a m p l e: EP93 576 3 A: Hui, S . Y. R. ; Ta ng ,
S . C. ; Ch ung , H. , Co r el es s p r inted- c ir c uit b o a r d tr a ns f o r m
er s f o r s ig na l a nd ener g y tr a ns f er , El ec tr o nic s Letter s , Vo l
um e: 3 4 Is s ue: 1 1 , 2 8 Ma y 1 998 , Pa g e( s ) : 1 052 - 1 054; Hui, S .
Y. R. ; Henr y S h u- Hung Ch ung ; Ta ng , S . C. , Co r el es s p r inted
c ir c uit b o a r d ( PCB) tr a ns f o r m er s f o r p o Wer MOS F ET/ IGBT
g a te dr iv e c ir c uits , IEEETr a ns a c tio ns o n Po wer El ec tr o nic s ,
Vo l um e: 1 4 Is s ue: 3 , Ma y 1 999, Pa g e( s ) : 42 2 - 43 0; Ta ng , S .
C. ; Hui, S . Y. R. ; Henr y S h u- Hung Ch ung , Co r el es s p r inted
c ir c uit b o a r d ( PCB) tr a ns f o r m er s With m ul tip l e s ec o nda r y
Winding s f o r c o m p l em enta r y g a te dr iv e c ir c uits , IEEE
Tr a ns a c tio ns o n Po wer El ec tr o nic s , Vo l um e: 1 4 Is s ue: 3 , Ma y
1 999, Pa g e( s ) : 43 1 - 43 7; Hui, S . Y. R. ; Ta ng , S . C. ; Henr y
S h u- Hung Ch ung , Op tim a l o p er a tio n o f c o r el es s PCB tr a ns
f o r m er - is o l a ted g a te dr iv e c ir c uits With Wide s Witc h ing f r e
q uenc y r a ng e , IEEETr a ns a c tio ns o n Po wer El ec tr o nic s , Vo l
um e: 1 4 Is s ue: 3 , Ma y 1 999, Pa g e( s ) : 506 - 51 4; a nd Ta ng , S .
C. ; Hui, S . Y. R. ; Henr y S h u- Hung Ch ung , Co r el es s p l a na r
p r inted- c ir c uit- b o a r d ( PCB) tr a ns f o r m er s ia f unda m enta l
c o nc ep t f o r s ig na l a nd ener g y tr a ns f er , IEEETr a ns a c tio ns o n
Po Wer El ec tr o nic s , Vo l um e: 1 5 Is s ue: 5, S ep tem b er 2 000,
Pa g e( s ) : 93 1 - 941 .
Ba s ed o n tWo p l a na r Winding s 3 00 a nd 3 02 o n tWo p a r a l l el
p l a nes a s s h o Wn in F IG. 3 , it h a s b een s h o Wn th a t b o th ener g y
a nd s ig na l c a n b e tr a ns f er r ed f r o m o ne p l a na r Winding to
a no th er . Th is p l a na r PCB tr a ns f o r m er tec h no l o g y h a s b een
a p p l ied in a r a ng e o f a p p l ic a tio ns . In 2 004, it Wa s us ed f o r a
c o nta c tl es s b a tter y c h a r g er f o r m o b il e p h o nes ( Ch o i B. , N h o
1 . , Ch a H. a nd Ch o i S . : , Des ig n a nd im p l em enta tio n o f l o W
p r o ?l e c o nta c tl es s b a tter y c h a r g er us ing p l a na r p r inted c ir c uit
b o a r d Winding s a s ener g y tr a ns f er dev ic e , IEEE Tr a ns a c
tio ns o n Indus tr ia l El ec tr o nic s , v o l . 51 , N o . 1 , F eb r ua r y 2 004,
p p . 1 40- 1 47) . Ch o i us es o ne p l a na r Winding 400 a s a p r im a r y
c h a r g ing p a d a nd a s ep a r a te p l a na r Winding 402 a s a s ec o nd
a r y Winding a s s h o Wn in F IGS . 4a a nd 4b . F IG. 5 s h o Ws th e
eq uiv a l ent el ec tr ic a l c ir c uit dia g r a m 500 o f th is c o nta c tl es s
c h a r g ing s y s tem . It s h o ul d b e no ted th a t th e p r im a r y c ir c uit is
b a s ed o n th e r es o na nt c ir c uit des c r ib ed b y Hui a nd Ta ng ,
Wh il e th e f r o nt p o Wer s ta g e o f th e s ec o nda r y c ir c uit is a
s ta nda r d Winding With a dio de r ec ti?er th a t p r o v ides th e r ec
ti?ed DCv o l ta g e f o r th e c h a r g ing c ir c uit.
TWo m a in p r o b l em s s uf f er ed b y th e p r io r a r t c h a r g ing
s y s tem o f F IG. 5 inc l ude:
( 1 ) Th e p l a na r Winding o f th e s ec o nda r y m o dul e m us t b e
p l a c ed dir ec tl y o n to p o f th e p l a na r Winding o f th e p r i
m a r y unit. If it is s l ig h tl y m is p l a c ed, th e ener g y tr a ns f er
Wil l b e s er io us l y h a m p er ed.
( 2 ) Th e us e o f o ne s p ir a l p l a na r Winding in th e s ec o nda r y
m o dul e to p ic k up ener g y em itted f r o m th e p r im a r y
Winding r eq uir es th e c h o ic e o f s Witc h ing f r eq uenc y to b e
v er y h ig h ( eg 950 kHZ ) . S uc h h ig h s Witc h ing f r eq uenc y
US 7, 495, 41 4 B2
3
l ea ds to h ig h s witc h ing l o s s in th e p r im a r y inv er ter c ir
c uit, h ig h ACr es is ta nc e in th e PCB c o p p er tr a c ks a nd
m o r e im p o r ta ntl y h ig h el ec tr o m a g netic inter f er enc e
( EMI) em is s io n.
Pr o b l em ( 1 ) c a n b e s o l v ed b y us ing a p l a na r induc tiv e
c h a r g ing p l a tf o r m b a s ed o n a m ul til a y er p l a na r Winding
a r r a y s tr uc tur e, Wh ic h a l l o Ws th e c h a r g ed el ec tr o nic
eq uip m ent to b e p l a c ed a ny Wh er e o n th e c h a r g ing s ur
f a c e a s des c r ib ed in WO03 / 1 053 08 . Th e p r es ent inv en
tio n a ddr es s es p r o b l em ( 2 ) a nd p r o v ides a s im p l e a nd
m o r e ef f ec tiv e s ec o nda r y dev ic e to ena b l e ener g y tr a ns
f er b etWeen th e p r im a r y p l a na r c h a r g ing p l a tf o r m a nd
th e s ec o nda r y m o dul e m o r e ef f ec tiv el y a t a m uc h l o Wer
o p er a ting f r eq uenc y ( eg a s l o W a s 1 00 kHZ ) .
S UMMARY OF THEIN VEN TION
Ac c o r ding to th e p r es ent inv entio n th er e is p r o v ided a
b a tter y p a c k f o r a n el ec tr o nic dev ic e c o m p r is ing : b a tter y
c el l s , a b a tter y c h a r g ing c ir c uit, a n ener g y r ec eiv ing el em ent
a da p ted to r ec eiv e p o Wer f r o m a p l a na r induc tiv e c h a r g ing
s y s tem , s a id ener g y r ec eiv ing el em ent h a v ing a n induc ta nc e,
a n ACc a p a c ito r c o nnec ted to s a id ener g y r ec eiv ing el em ent
a nd f o r m ing a r es o na nt ta nk th er eWith , a nd a dio de r ec ti?er
a nd a DCc a p a c ito r c o nnec ted to th e ener g y r ec eiv ing el em ent
to p r o v ide a r ec ti?ed DCv o l ta g e th a t c a n b e f ed f r o m th e
ener g y r ec eiv ing el em ent to s a id b a tter y c h a r g ing c ir c uit.
Pr ef er a b l y th e ener g y r ec eiv ing el em ent c o m p r is ing a g en
er a l l y p l a na r th in s o f t m a g netic s h eet a nd a ?r s t c o il Wo und
a r o und th e edg e o f s a id s h eet s uc h th a t th e c o il l ies in a p l a ne
de?ned b y th e m a g netic s h eet. In s uc h a n em b o dim ent th e AC
c a p a c ito r m a y b e c o nnec ted in s er ies With th e ?r s t c o il f o r m
ing a r es o na nt ta nk With th e ?r s t c o il a nd th e m a g netic s h eet.
Th e dio de r ec ti?er m a y b e eith er a s ta nda r d dio de r ec ti?er o r
a v o l ta g e do ub l er . Th e o utp ut o f th e r ec ti?er c a n p r ef er a b l y b e
f ed to a dc - DC v o l ta g e r eg ul a to r Wh ic h p r o v ides a s ta b l e
v o l ta g e f o r c h a r g ing th e b a tter y .
In s o m e em b o dim ents o f th e inv entio n th e dio de r ec ti?er
a nd th e c a p a c ito r a r e f o r m ed a s p a r t o f th e b a tter y c h a r g ing
c ir c uit.
Pr ef er a b l y th er e m a y b e p r o v ided a s ec o nda r y ener g y
r ec eiv ing el em ent c o m p r is ing a s ec o nd c o il f o r m ed in a p l a ne
p a r a l l el to th e s o f t m a g netic s h eet a nd Wh er ein th e s ec o nd c o il
is c o nnec ted in p a r a l l el With th e ?r s t c o il . Th is s ec o nd c o il
m a y b e f o r m ed o n a p r inted c ir c uit b o a r d Wh ic h m a y b e ?x ed
to s a id s o f t m a g netic s h eet.
In a no th er em b o dim ent o f th e inv entio n th e ener g y r ec eiv
ing el em ent m a y c o m p r is e a c o il f o r m ed o n a p r inted c ir c uit
b o a r d.
Ac c o r ding to a no th er a s p ec t o f th e inv entio n th er e is p r o
v ided a n el ec tr o nic dev ic e p o Wer ed b y a b a tter y p a c k, s a id
b a tter y p a c k c o m p r is ing b a tter y c el l s a nd a b a tter y c h a r g ing
c ir c uit, s a id dev ic e c o m p r is ing a h o us ing , m ea ns f o r c o nnec t
ing s a id b a tter y c h a r g ing c ir c uit to a n ex ter na l p o Wer a da p to r ,
a nd s a id dev ic e f ur th er c o m p r is ing a n ener g y r ec eiv ing el e
m ent a da p ted to r ec eiv e p o Wer f r o m a p l a na r induc tiv e c h a r g
ing s y s tem a nd f o r s up p l y ing p o Wer to s a id b a tter y c h a r g ing
c ir c uit, s a id ener g y r ec eiv ing el em ent h a v ing a n induc ta nc e,
a nd a n ACc a p a c ito r c o nnec ted to s a id ener g y r ec eiv ing el e
m ent a nd f o r m ing a r es o na nt ta nk th er eWith .
Pr ef er a b l y th e ener g y r ec eiv ing el em ent c o m p r is es a g en
er a l l y p l a na r th in s o f t m a g netic s h eet l o c a ted o n a s ide o f th e
b a tter y p a c k f a c ing a s ide o f th e h o us ing a da p ted to b e
r ec eiv ed o n a p l a na r induc tiv e c h a r g ing s y s tem a nd a ?r s t c o il
Wo und a r o und th e edg e o f th e s h eet s uc h th a t th e c o il l ies in a
p l a ne de?ned b y s a id m a g netic s h eet. In s uc h a n em b o dim ent
th e ACc a p a c ito r m a y b e c o nnec ted in s er ies With th e ?r s t c o il
1 0
2 0
2 5
3 0
3 5
40
50
55
6 0
6 5
4
f o r m ing a r es o na nt ta nk With th e ?r s t c o il a nd th e m a g netic
s h eet. Th e dio de r ec ti?er m a y b e eith er a s ta nda r d dio de
r ec ti?er o r a v o l ta g e do ub l er .
In s o m e em b o dim ents o f th e inv entio n th e dio de r ec ti?er
a nd th e c a p a c ito r a r e f o r m ed a s p a r t o f th e b a tter y c h a r g ing
c ir c uit.
Pr ef er a b l y th er e m a y b e p r o v ided a s ec o nda r y ener g y
r ec eiv ing el em ent c o m p r is ing a s ec o nd c o il f o r m ed a s a s p ir a l
in a p l a ne p a r a l l el to th e s o f t m a g netic s h eet a nd Wh er ein th e
s ec o nd c o il is c o nnec ted in p a r a l l el With th e ?r s t c o il . Th is
s ec o nd c o il m a y b e f o r m ed o n a p r inted c ir c uit b o a r d Wh ic h
m a y b e ?x ed to s a id s o f t m a g netic s h eet.
In a no th er em b o dim ent o f th e inv entio n th e ener g y r ec eiv
ing el em ent m a y c o m p r is e a c o il f o r m ed o n a p r inted c ir c uit
b o a r d.
Ac c o r ding to a f ur th er a s p ec t o f th e p r es ent inv entio n th er e
is p r o v ided a n ener g y r ec eiv ing el em ent a da p ted to b e ?x ed to
a b a tter y p a c k to ena b l e s a id b a tter y p a c k to b e c h a r g ed f r o m
a p l a na r induc tiv e b a tter y c h a r g ing s y s tem , s a id ener g y
r ec eiv ing el em ent h a v ing a n AC c a p a c ito r , Wh er ein s a id
ener g y r ec eiv ing el em ent h a s a n induc ta nc e a nd f o r m s a r es o
na nt ta nk With a n ACc a p a c ito r .
Ac c o r ding to a s til l f ur th er a s p ec t o f th e p r es ent inv entio n
th er e is p r o v ided a n ener g y r ec eiv ing el em ent a da p ted to b e
?x ed to a b a tter y p a c k to ena b l e s a id b a tter y p a c k to b e
c h a r g ed f r o m a p l a na r induc tiv e b a tter y c h a r g ing s y s tem , s a id
ener g y r ec eiv ing el em ent c o m p r is ing a g ener a l l y p l a na r th in
s o f t m a g netic s h eet a nd a ?r s t c o il Wo und a r o und th e edg e o f
s a id s h eet s uc h th a t th e c o il l ies in a p l a ne de?ned b y s a id
m a g netic s h eet.
Pr ef er a b l y th e ener g y r ec eiv ing el em ent f ur th er c o m p r is es
a n AC c a p a c ito r c o nnec ted in s er ies With th e ?r s t c o il a nd
f o r m ing a r es o na nt ta nk With th e ?r s t c o il a nd th e m a g netic
s h eet.
Th e ener g y r ec eiv ing el em ent m a y f ur th er c o m p r is e a
dio de r ec ti?er a nd a DCc a p a c ito r c o nnec ted to th e ?r s t c o il to
p r o v ide a r ec ti?ed DCv o l ta g e th a t c a n b e f ed f r o m th e ener g y
r ec eiv ing el em ent to a b a tter y c h a r g ing c ir c uit o f th e b a tter y
p a c k. Th e dio de r ec ti?er m a y b e a s ta nda r d dio de o r a v o l ta g e
do ub l er .
In a p r ef er r ed em b o dim ent th e ener g y r ec eiv ing el em ent
m a y f ur th er c o m p r is e a s ec o nd c o il f o r m ed a s a s p ir a l in a
p l a ne p a r a l l el to th e s o f t m a g netic s h eet a nd Wh er ein th e
s ec o nd c o il is c o nnec ted in p a r a l l el With th e ?r s t c o il . Th is
s ec o nd c o il m a y b e f o r m ed o n a p r inted c ir c uit b o a r d Wh ic h
m a y b e ?x ed to th e s o f t m a g netic s h eet.
ABRIEF DES CRIPTION OF THEDRAWIN GS
S o m e em b o dim ents o f th e inv entio n Wil l no Wb e des c r ib ed
b y Wa y o f ex a m p l e a nd With r ef er enc e to th e a c c o m p a ny ing
dr a Wing s , in Wh ic h :
F IG. 1 ( a ) a nd ( b ) s h o W ( a ) a n induc tiv e b a tter y c h a r g ing
p l a tf o r m a nd ( b ) a s ec o nda r y dev ic e a c c o r ding to th e p r io r a r t,
F IG. 2 s h o Ws a n induc tiv e b a tter y c h a r g ing p l a tf o r m o f th e
p r io r a r t With m a g netic ?ux l ines ?o Wing in a nd o ut p er p en
dic ul a r l y o f th e c h a r g ing s ur f a c e,
F IG. 3 s h o Ws ty p ic a l p l a na r Winding s f o r m ed o n th e o p p o
s ite s ides o f a p r inted c ir c uit b o a r d in a n ener g y tr a ns f er
m ec h a nis m o f th e p r io r a r t,
F IGS . 4( a ) a nd ( b ) s h o W ( a ) p l a na r Winding s o n tWo p a r
a l l el p l a nes a nd ( b ) th eir us e in a c o nta c tl es s b a tter y c h a r g ing
p a d o f th e p r io r a r t,
F IG. 5 s h o Ws th e eq uiv a l ent c ir c uit o f th e s y s tem in F IG.
4( 1 ) )
F IG. 6 s h o Ws a f unc tio na l b l o c k dia g r a m o f a p o Wer a da p
to r o f a tr a ditio na l p r io r a r t b a tter y c h a r g er ,
US 7, 495, 41 4 B2
5
F IG. 7 s h o ws a ty p ic a l b a tter y p a c k us ed in a p o r ta b l e
el ec tr o nic eq uip m ent s uc h a s a m o b il e p h o ne,
F IG. 8 s h o Ws th e inter na l s tr uc tur e o f th e b a tter y p a c k o f
F IG. 7, c o ns is ting o f a n el ec tr ic c el l ( o r b a tter y ) a nd a c h a r g
ing p r o tec tio n c ir c uit,
F IG. 9 s h o Ws a f unc tio na l b l o c k dia g r a m o f th e b a tter y
p a c k o f F IGS . 7 a nd 8 ,
F IG. 1 0 s h o Ws a f unc tio na l b l o c k dia g r a m o f a p r io r a r t
p o Wer a da p ter c o nnec ted to a b a tter y p a c k ins ide a c h a r g ed
el ec tr o nic eq uip m ent,
F IG. 1 1 ( a ) a nd ( b ) s h o W ( a ) a th in s o f t m a g netic s h eet
( s q ua r e o r r ec ta ng ul a r o r o th er p o l y g o na l s h a p e) enc l o s ed
With a Winding a nd ( b ) a th in s o f t m a g netic s h eet ( c ir c ul a r o r
o v a l s h a p e) to f o r m a n ener g y p ic k- up c o il a s Wel l a s a n
induc to r in a n em b o dim ent o f th e inv entio n,
F IGS . 1 2 ( a ) a nd ( b ) s h o Wa n ener g y p ic k- up c o il a c c o r ding
to a n em b o dim ent o f th e inv entio n c o ns is ting o f a s p ir a l
Winding a nd a c o nc entr a ted Winding c o nnec ted in p a r a l l el ,
F IG. 1 3 ( a ) - ( c ) s h o W( a ) a s c h em a tic dia g r a m o f a n em b o di
m ent o f th e inv entio n, ( b ) th e c ir c uit dia g r a m o f o ne em b o di
m ent o f th e inv entio n, a nd ( c ) th e c ir c uit dia g r a m o f a no th er
em b o dim ent o f th e inv entio n,
F IG. 1 4 s h o Ws a f unc tio na l b l o c k dia g r a m o f th e p r o p o s ed
c ir c uit c o nnec ted to a b a tter y p a c k in a c h a r g ed el ec tr o nic
eq uip m ent,
F IG. 1 5 s h o Ws a f unc tio na l b l o c k dia g r a m o f th e p r o p o s ed
b a tter y p a c k, With th e r es o na nt c a p a c ito r , th e dio de r ec ti?er
a nd th e DC c a p a c ito r integ r a ted into th e ex is ting c h a r g ing
p r o tec tio n c ir c uit,
F IG. 1 6 is a n ex p l o ded v ieW s h o Wing th e m a j o r c o m p o
nents o f a p r o p o s ed b a tter y p a c k a c c o r ding to a n em b o dim ent
o f th e inv entio n f o r c o m p a tib il ity With a p l a na r induc tiv e
c h a r g ing p l a tf o r m ,
F IG. 1 7( a ) - ( c ) s h o W th e a s s em b l y o f th e b a tter y p a c k o f
F IG. 1 6 ,
F IG. 1 8 il l us tr a tes th e m a nner o f c h a r g ing el ec tr o nic
dev ic es inc o r p o r a ting em b o dim ents o f th e inv entio n, a nd
F IG. 1 9 s h o Ws th e eq uiv a l ent c ir c uit o f th e p r im a r y c ir c uit
( p l a na r induc tiv e c h a r g er ) a nd s ec o nda r y l o a ds ( el ec tr o nic
eq uip m ent to b e c h a r g ed) in a n em b o dim ent o f th e inv entio n.
DETAILED DES CRIPTION OF PREF ERRED
EMBODIMEN TS
Tr a ditio na l p o Wer a da p to r s ( o r b a tter y c h a r g er s ) f o r p o r
ta b l e el ec tr o nic eq uip m ent s uc h a s m o b il e p h o nes a nd el ec
tr o nic o r g a nis er s a r e es s entia l l y AC- DC p o Wer c o nv er ter s
th a t c h a ng e a n ACm a ins v o l ta g e ( ty p ic a l l y 1 1 0V- 2 40V) to a
DCv o l ta g e ( ty p ic a l l y 3 V to 1 2 V) . Mo s t b a tter y c h a r g er s f o r
m o b il e p h o nes p r o v ide a DCv o l ta g e o f 4- 6 V. Th e f unc tio na l
b l o c k dia g r a m 6 00 o f a p o Wer a da p ter is s h o Wn in F IG. 6 .
Wh en th e p o Wer a da p to r is p l ug g ed into th e el ec tr o nic eq uip
m ent ( to b e c h a r g ed) , th e tWo o utp uts DC+ 6 02 a nd DC- 6 04
a r e c o nnec ted to th e m ec h a nic a l c o nta c ts o f th e c h a r g er
s o c ket o f th e el ec tr o nic eq uip m ent.
F IG. 7 dep ic ts a b a tter y p a c k 700 With s ev er a l ex ter na l
m ec h a nic a l c o nta c ts ( e. g . , c o nta c t 702 ) th a t a r e a c c es s ib l e.
Ins ide th e b a tter y p a c k a r e th e el ec tr ic c el l s 704 a nd a
c h a r g ing p r o tec tio n c ir c uit 706 a s s h o Wn in F IG. 8 . TWo
m ec h a nic a l c o nta c ts 702 a nd 708 a r e c o nnec ted to th e p o s i
tiv e a nd neg a tiv e ter m ina l s o f th e b a tter y th r o ug h th e c h a r g ing
p r o tec tio n c ir c uit. Th e c el l s f o r m th e b a tter y a nd th e c h a r g ing
p r o tec tio n c ir c uit ens ur es th a t th e b a tter y is c h a r g ed in a
s p ec i?ed m a nner . F IG. 9 s h o Ws th e f unc tio na l b l o c k dia g r a m
900 o f th e b a tter y p a c k o f F IGS . 7 a nd 8 . Th e inp ut p o s itiv e
a nd neg a tiv e ter m ina l s o f th e c h a r g ing p r o tec tio n c ir c uit a r e
l a b el ed a s IN + 902 a nd IN - 904, r es p ec tiv el y . Th e o utp ut
2 0
2 5
3 0
3 5
40
45
50
55
6 0
6 5
6
p o s itiv e a nd neg a tiv e ter m ina l s o f th is c ir c uit a r e l a b el ed
OUT+ 906 a nd OUT- 908 , r es p ec tiv el y . Outp ut ter m ina l s
906 a nd 908 a r e c o nnec ted to th e b a tter y a s s h o Wn in F IG. 1 0.
If th e m ec h a nic a l c o nnec to r o f th e p o Wer a da p to r is ins er ted
into th e c h a r g ing s o c ket o f th e el ec tr o nic eq uip m ent, th e
eq uiv a l ent b l o c k dia g r a m 1 000 is s h o Wn in F IG. 1 0, a c o m
b ina tio n o f F IGS . 6 a nd 9. Es s entia l l y , DC+ a nd DC- a r e
c o nnec ted to IN + a nd IN , r es p ec tiv el y .
Ac c o r ding to a p r ef er r ed em b o dim ent o f th is inv entio n, a n
ener g y r ec eiv ing el em ent in th e f o r m o f a p l a na r dev ic e is
intr o duc ed to th e b a tter y p a c k s tr uc tur e o f F IGS . 7- 9 s o th a t
th is b a tter y p a c k c a n b e c h a r g ed induc tiv el y b y a p l a na r
c h a r g ing p l a tf o r m s uc h a s th a t in F IG. 2 ( Wh ic h h a s th e
m a g netic ?ux l ines ?o Wing into a nd o ut o f th e c h a r g ing s ur
f a c e p er p endic ul a r l y ) . Us ing a m o b il e p h o ne a s a n ex a m p l e,
th e b a tter y p a c k is us ua l l y a c c o m m o da ted ins ide th e m o b il e
p h o ne a nd is c o v er ed b y th e b a c k c o v er o f th e m o b il e p h o ne.
If a m o b il e p h o ne is p l a c ed o n th e p l a na r induc tiv e b a tter y
c h a r g ing p l a tf o r m o f F IG. 2 , o ne s ide o f th e b a tter y p a c k Wil l
f a c e th e c h a r g ing s ur f a c e o f th e c h a r g ing p l a tf o r m . Th is s ide
Wil l b e c a l l ed th e a c tiv e s ide o f th e b a tter y p a c k in th is
s p ec i?c a tio n b ec a us e it is c l o s es t to th e c h a r g ing s ur f a c e o f
th e c h a r g ing p l a tf o r m a nd Wil l b e us ed f o r induc tiv e c h a r g ing
p ur p o s es . Th er e Wil l b e o nl y th e b a c k c o v er ( us ua l l y m a de o f
p l a s tic ) o f th e m o b il e p h o ne b etWeen th e a c tiv e s ide o f th e
b a tter y p a c k a nd c h a r g ing s ur f a c e o f th e c h a r g ing p l a tf o r m .
In a ?r s t em b o dim ent o f th e inv entio n s h o Wn in F IG. 1 3 a ,
th e ener g y r ec eiv ing el em ent 1 3 00 c o m p r is es a Winding 1 3 02
Wo und a r o und a nd With in th e th ic knes s o f a th in s o f t m a g netic
s h eet 1 3 04, a s m a l l ACc a p a c ito r 1 3 06 , a dio de r ec ti?er 1 3 08
a nd a DCl ink c a p a c ito r 1 3 1 0. Th e s o f t m a g netic s h eet m a y
b e, f o r ex a m p l e, s q ua r e, r ec ta ng ul a r o r o th er p o l y g o na l
s h a p es a s s h o Wn in F IG. 1 1 ( a ) , o r m a y b e c ir c ul a r o r o v a l a s
s h o Wn in F IG. 1 1 ( 1 ) ) . Th e Winding a nd s o f t m a g netic s h eet
f o r m a n ener g y p ic k- up c o il o r induc to r a s s h o Wn in F IG.
1 1 ( a ) o r 1 1 ( b ) , Wh ic h th en f o r m s a r es o na nt ta nk With th e
s m a l l r es o na nt c a p a c ito r . Wh en s ens ing a h ig h - f r eq uenc y AC
m a g netic ?ux ?o Wing p er p endic ul a r l y ( o r v er tic a l l y ) f r o m th e
s ur f a c e o f th e p l a na r induc tiv e b a tter y c h a r g ing p l a tf o r m , th e
ener g y p ic k- up c o il Wil l dev el o p a nACv o l ta g e b y F a r a da y s
l a W a nd p ic ks up th e ener g y tr a ns m itted f r o m a p l a na r c h a r g
ing p l a tf o r m . Th is c o il enc l o s ing th e s o f t m a g netic s h eet ( a s a
l o W- p r o ?l e m a g netic c o r e) is es s entia l l y a p l a na r induc to r .
Th is p l a na r induc to r a nd th e s er ies - c o nnec ted ACc a p a c ito r
f o r m a s er ies r es o na nt ta nk th a t c a n a m p l if y th e ACv o l ta g e
f o r th e dio de r ec ti?er . Th e dio de r ec ti?er a nd th e DCc a p a c ito r
r ec tif y th e ACv o l ta g e into a DCv o l ta g e th a t c a n b e f ed to a
b a tter y c h a r g ing c ir c uit. Pr ef er a b l y a v o l ta g e r eg ul a to r c a n b e
us ed to p r o v ide a s ta b l e DCv o l ta g e f r o m th e o utp ut o f th e
r ec ti?er . Th e f o l l o Wing s ec tio ns des c r ib e th e p r o p o s ed l o W
p r o ?l e dev ic e in m o r e deta il .
In o r der to ef f ec tiv el y p ic k up th e p er p endic ul a r ACm a g
netic ?ux g ener a ted b y th e p l a na r induc tiv e c h a r g ing p l a tf o r m
o f F IG. 2 , a p l a na r Winding 1 1 00 With a c er ta in num b er o f
tur ns ( e. g . , 1 2 tur ns ) in th e s ec o nda r y m o dul e is Wo und
a r o und a th in s h eet o f s o f t m a g netic m a ter ia l ( 1 1 02 , 1 1 04) a s
s h o Wn in F IGS . 1 1 ( a ) a nd 1 1 ( 1 ) ) . Th e h eig h t o f th is Winding is
l es s th a n th e th ic knes s o f th e s o f t m a g netic s h eet. Th is th in o r
l o W- p r o ?l e s tr uc tur e c a n b e p l a c ed o r g l ued, f o r ex a m p l e, o n
th e a c tiv e s ide o f th e b a tter y ins ide th e b a tter y p a c k. Th e th in
s o f t m a g netic s h eet s er v es a s a m a g netic c o r e f o r th e Winding
a nd g uides th e p er p endic ul a r ACm a g netic ?ux ( g ener a ted b y
th e c h a r g ing p l a tf o r m ) th r o ug h th e Winding . It s h o ul d b e
no ted th a t th e th ic knes s o f th e s o f t m a g netic s h eet c a n b e v er y
s m a l l ( e. g . , 0. 5 m m ) b ec a us e th e c r o s s - s ec tio na l a r ea f o r th e
m a g netic ?ux to Ho w is th e l a r g e ?a t s ur f a c e o f th e s o f t
m a g netic s h eet ( a s th e m a g netic ?ux l ines ?o Wp er p endic u
US 7, 495, 41 4 B2
7
l a r l y into a nd o ut o f th is ?a t s ur f a c e) . Th is h ig h l ig h ts th e h ug e
a dv a nta g e o f th e p er p endic ul a r ?ux g ener a tio n o f th e induc
tiv e b a tter y c h a r g ing p l a tf o r m o f WO03 / 1 053 08 o v er th e
h o r izo nta l ?ux g ener a tio n o f GB2 3 992 2 5A. Th e th in s tr uc
tur e o f th e p r o p o s ed dev ic e o f th e p r es ent inv entio n m a kes it
ea s y to m o dif y ex is ting b a tter y p a c ks With o ut s ub s ta ntia l l y
inc r ea s ing th e th ic knes s o f th e b a tter y p a c k. Th is m a kes it
a ttr a c tiv e f o r l o W- p r o ?l e p o r ta b l e el ec tr o nic eq uip m ent
s uc h a s m o b il e p h o nes .
It s h o ul d b e no ted th a t Wh il e th e p r es ent inv entio n is p a r
tic ul a r l y s uited f o r us e With th e b a tter y c h a r g ing p l a tf o r m o f
WO03 / 1 053 08 it is no t l im ited to us e With th a t p l a tf o r m a nd
c o ul d b e us ed With a ny b a tter y c h a r g ing p l a tf o r m in Wh ic h th e
l ines o f ?ux ex tend g ener a l l y p er p endic ul a r to th e c h a r g ing
s ur f a c e.
An a l ter na tiv e to th e p l a na r Winding s tr uc tur es o f F IGS .
1 1 ( a ) a nd 1 1 ( b ) is s h o Wn in F IGS . 1 2 ( a ) a nd 1 2 ( 1 ) ) . As ec
o nda r y ener g y r ec eiv ing el em ent m a y b e a dded to th e ?r s t
ener g y r ec eiv ing el em ent. In p a r tic ul a r , a dditio na l s p ir a l
Winding s c a n b e a dded ( c o nnec ted in p a r a l l el ) to th e p ic k- up
c o il ( i. e. th e ?r s t Winding th a t enc l o s es th e s o f t m a g netic c o r e)
b y p r inting o ne o r m o r e s p ir a l Winding s 1 2 00 o n a p r inted
c ir c uit b o a r d ( PCB) 1 2 02 th a t is p l a c ed o n to p o f a m a g netic
s h eet 1 2 04. Th e PCB is p l a c ed o n th e s ide o f th e m a g netic
s h eet th a t in us e Wo ul d f a c e th e p r im a r y Winding ( s ) . It s h o ul d
a l s o b e no ted th a t th e PCB c a n b e v er y th in ( e. g . , 0. 2 m m ) s o
th e c o m b ina tio n o f th e PCB a nd th e m a g netic s h eet is s til l
v er y th in. By c o nnec ting ( 1 2 1 4) ter m ina l 1 2 08 o f th e a ddi
tio na l Winding to ter m ina l 1 2 06 o f th e ?r s t Winding 1 2 07, a nd
c o nnec ting ( 1 2 1 6 ) ter m ina l 1 2 1 2 o f th e a dditio na l Winding to
ter m ina l 1 2 1 0 o f th e ?r s t Winding , a s s h o Wn in F IG. 1 2 b , th e
tWo Winding s a r e c o nnec ted in p a r a l l el . Th e ex tr a p l a na r
Winding ( s ) c a n im p r o v e th e ener g y p ic k- up in th e s ec o nda r y
m o dul e.
It s h o ul d a l s o b e no ted th a t a c o il f o r m ed o n a p r inted
c ir c uit b o a r d in a dditio n to a c ting a s a s ec o nda r y ener g y
r ec eiv ing el em ent in th e a b o v edes c r ib ed em b o dim ent, m a y
a l ter na tiv el y s er v e a s a s ing l e ener g y r ec eiv ing el em ent o n its
o Wn.
Th e s ec o nda r y c ir c uit us ed b y Ch o i in th e p r io r a r t c a n o nl y
p ic k up a s uf ?c ientl y l a r g e v o l ta g e f r o m th e p r im a r y c ir c uit a t
h ig h f r eq uenc y ( 950 kHZ ) . Th e us e o f s uc h h ig h f r eq uenc y
l ea ds to m a ny s h o r tc o m ing s s uc h a s h ig h ACr es is ta nc e in th e
Winding s , r educ ed ener g y e?ic ienc y , h ig h s Witc h ing l o s s es
a nd h ig h EMl em is s io n in b o th p r im a r y a nd s ec o nda r y c ir
c uits . Unl ike th e s ta nda r d s ec o nda r y Winding us ed in th is
p r io r a r t, th e Winding o f th e p r es ent inv entio n ( F IGS . 1 1 a nd
1 2 ) s er v es a s b o th a n ener g y p ic k- up c o il a nd a r es o na nt
induc to r ( Lr ) . As m a l l ACc a p a c ito r ( Cr ) is c o nnec ted in s er ies
( o r p o s s ib l y in p a r a l l el ) With th is c o il ( a n induc to r ) a s s h o Wn
in F IG. 1 3 ( F IG. 1 3 b s h o Ws a c ir c uit dia g r a m 1 3 1 1 o f F IG.
1 3 a ) to f o r m a r es o na nt ta nk, Wh ic h is th en c o nnec ted to th e
dio de r ec ti?er With a DCc a p a c ito r ( Cdc ) . Th e dio de r ec ti?er
tur ns th e r es o na nt ACv o l ta g e p ic ked up b y th e r es o na nt ta nk
into a DCv o l ta g e a nd th e DCc a p a c ito r r educ es th e v o l ta g e
r ip p l e in o r der to m a inta in a f a ir l y s tif f DCv o l ta g e f o r th e
c h a r g ing c ir c uit. It s h o ul d b e no ted th a t th e dio de r ec ti?er c a n
b e o f a s ta nda r d ty p e a s s h o Wn in F IG. 1 3 ( 1 ) ) , o r it c a n b e o f a
ty p e 1 3 1 2 With v o l ta g e do ub l ing ( s o m etim es c a l l ed v o l ta g e
do ub l er ) a s s h o Wn in F IG. 1 3 ( 0) . Th e us e o f a v o l ta g e r eg u
l a to r c a n ens ur e a s ta b l e DCv o l ta g e f o r c h a r g ing th e b a tter y .
Th e us e o f th e s m a l l r es o na nt c a p a c ito r ( Cr ) is v er y im p o r
ta nt. Th e r es o na nt f r eq uenc y ( f r ) o f th e r es o na nt ta nk f o r m ed
b y Lr a nd Cr c a n b e ex p r es s ed a s :
2 0
3 0
3 5
40
45
50
55
6 0
6 5
l
Th e us e o f th is a dditio na l r es o na nt c a p a c ito r o f f er s a
des ig ner th e f r eedo m to s el ec t th e a p p r o p r ia te o p er a ting f r e
q uenc y f o r th e entir e c h a r g ing s y s tem in o r der to o p tim iZ e th e
s y s tem p er f o r m a nc e f o r m eeting v a r io us r eq uir em ents a nd
inter na tio na l s ta nda r ds . It h a s b een ex p l a ined in WO03 /
1 053 08 th a t th e p r im a r y c ir c uit ( i. e. eq uiv a l ent c ir c uit o f th e
induc tiv e b a tter y c h a r g ing p l a tf o r m ) is es s entia l l y a L- Cr es o
na nt c ir c uit. By c h o o s ing th e r es o na nt f r eq uenc ies o f b o th
p r im a r y a nd s ec o nda r y r es o na nt c ir c uits to b e identic a l o r a s
c l o s e a s p o s s ib l e, ener g y tr a ns f er b etWeen th em c a n b e o p ti
m iZ ed. With th e us e o f a c o r e- b a s ed p l a na r induc to r in th is
p r o p o s a l , th e induc ta nc e v a l ue o f Lr c a n b e m uc h g r ea ter th a n
th a t o f a c o r el es s s p ir a l Winding a s in th e p r io r a r t. Th er ef o r e,
a c c o r ding to th e a b o v e eq ua tio n, th e r es o na nt f r eq uenc ies o f
b o th o f th e p r im a r y a nd s ec o nda r y c ir c uit c a n b e s el ec ted a t a
r el a tiv el y l o W f r eq uenc y r a ng e ( eg 1 00 kHZ to 450 kHZ )
ins tea d o f 950 kHZ a s in th e c a s e o f th e p r io r a r t.
Wh en p l a c ed o n th e c h a r g ing p l a tf o r m , th e c h a r g ed el ec
tr o nic eq uip m ent h a s th e a c tiv e s ide o f th e b a tter y p a c k nea r
a nd p a r a l l el to th e c h a r g ing s ur f a c e o f th e c h a r g ing p l a tf o r m ,
Wh ic h p r o duc es a m a g netic ?ux ?o Wing in a nd o ut o f th e
c h a r g ing s ur f a c e p er p endic ul a r l y . By F a r a da y s l a W, a n AC
v o l ta g e Wil l b e induc ed in th e s ec o nda r y Winding . In th is
inv entio n, th e tWo ter m ina l s o f th e s ec o nda r y r es o na nt ta nk
a r e c o nnec ted to a dio de r ec ti?er a nd a c a p a c ito r a s s h o Wn in
F IG. 1 3 . Th e us e o f th is dio de r ec ti?er a nd a s m o o th ing
c a p a c ito r is im p o r ta nt. F ir s tl y , th e dio de r ec ti?er tur ns th e
induc edACv o l ta g e in th e Winding into a r ec ti?ed DCv o l ta g e
a nd th e DCc a p a c ito r r educ es th e ACv o l ta g e r ip p l e s o th a t a
f a ir l y c o ns ta nt DC v o l ta g e c a n b e m a de a v a il a b l e f o r th e
c h a r g ing p r o tec tio n c ir c uit. S ec o ndl y , th e dio de r ec ti?er p r e
v ents a ny c ur r ent f r o m ?o Wing into th e s ec o nda r y r es o na nt
ta nk 1 400 f o r m ed b y Lr a nd Cr Wh en a tr a ditio na l b a tter y
c h a r g er is p l ug g ed into th e c h a r g ed eq uip m ent. Th is f ea tur e
c a n b e ex p l a ined With th e us e o f th e b l o c k dia g r a m a s s h o Wn
in F IG. 1 4. As th e intr o duc tio n o f th e p r o p o s ed induc tiv e
c h a r g ing dev ic e s h o ul d no t a f f ec t th e us e o f a tr a ditio na l
p o Wer a da p to r , it is im p o r ta nt th a t th e neW c ir c uit s h o ul d
a l l o Wth e el ec tr o nic eq uip m ent to b e c h a r g ed b y b o th a p l a na r
induc tiv e c h a r g ing p l a tf o r m a nd a tr a ditio na l p o Wer a da p to r .
If a tr a ditio na l p o Wer a da p to r 1 402 is p l ug g ed into th e c h a r g
ing s o c ket o f th e el ec tr o nic eq uip m ent, th e ter m ina l s DC+
1 404 a nd DC- 1 406 Wil l b e c o nnec ted to l N + 1 408 a nd IN
1 41 0 o f th e b a tter y p a c k th r o ug h th e m ec h a nic a l c o nta c ts in
th e c h a r g ing s o c ket. Th e p r es enc e o f th e dio de r ec ti?er is
c r uc ia l h er e b ec a us e it p r ev ents a ny c ur r ent f r o m th e tr a di
tio na l p o Wer a da p to r f r o m ?o Wing into th e s ec o nda r y Wind
ing .
Af ur th er p r o p o s a l in th is inv entio n is to inc o r p o r a te th e
r es o na nt c a p a c ito r Cr , th e dio de r ec ti?er a nd th e DCc a p a c ito r
Cdc into th e ex is ting c h a r g ing p r o tec tio n c ir c uit a s s h o Wn in
F IG. 1 5. In th is Wa y , th e tWo ter m ina l s 1 500, 1 502 o f th e
s ec o nda r y Winding c a n s im p l y b e c o nnec ted to th e inp uts o f
th e m o di?ed c h a r g ing p r o tec tio n c ir c uit 1 504. Th e DCp o Wer
ter m ina l s 1 506 , 1 508 o f a tr a ditio na l p o Wer a da p to r o r
c h a r g er , if us ed, Wil l b e c o nnec ted to l N + 1 51 0 a nd IN - 1 51 2
o f th e m o di?ed c ir c uit a s us ua l ( F IG. 1 5) . Th is a r r a ng em ent
f ur th er s im p l i?es th e m a nuf a c tur ing p r o c es s o f th e b a tter y
p a c k th a t Wil l no W b ec o m e c o m p a tib l e With th e induc tiv e
b a tter y c h a r g ing p l a tf o r m o f F IG. 2 With p er p endic ul a r m a g
netic ?ux a s Wel l a s a tr a ditio na l p o Wer a da p to r .
US 7, 495, 41 4 B2
F IG. 1 6 s h o ws th e c o m p o nent p a r ts o f th e p r o p o s ed b a tter y
p a c k inc l uding a b a tter y p a c k c a s ing 1 6 00, b a tter y 1 6 02 , a
s o f t m a g netic s h eet 1 6 04 With Winding 1 6 06 p l a c ed o n to p o f
th e b a tter y , a c o v er 1 6 08 f o r th e a c tiv e s ide o f th e b a tter y p a c k,
a nd a m o di?ed c h a r g ing a nd p r o tec tio n c ir c uit 1 6 1 0 inc l uding
th e ex tr a dio de r ec ti?er a nd c a p a c ito r s des c r ib ed With r es p ec t
to F IG. 1 5. F IGS . 1 7( a ) a nd 1 7( b ) s h o W th e s im p l e a s s em
b l ing p r o c es s o f th es e p a r ts f o r a b a tter y p a c k 1 700. As l o ng a s
th e a c tiv e s ide o f th e b a tter y p a c k f a c es th e s ur f a c e o f th e
c h a r g ing p l a tf o r m , th e el ec tr o nic eq uip m ent ( e. g . , 1 8 00,
1 8 02 ) c a n b e c h a r g ed b y th e p l a na r induc tiv e c h a r g ing p l a t
f o r m 1 8 04 a s s h o Wn in F IG. 1 8 . It s h o ul d b e no ted th a t th e
p r o p o s ed dev ic e in F IG. 1 1 a nd F IG. 1 2 c a n b e a s ep a r a te
dev ic e o r c a n b e integ r a ted into a b a tter y p a c k ( F IG. 1 7) a s
ex p l a ined a b o v e. Wh en us ed a s a s ep a r a te dev ic e ( F IG. 1 3 ) , it
c a n b e us ed to m a ke ex is ting el ec tr o nic eq uip m ent c o m p a t
ib l e With th e induc tiv e c h a r g ing p l a tf o r m .
Th e eq uiv a l ent c ir c uit 1 900 o f th is inv entio n Wh en us ed
With th e p l a na r induc tiv e c h a r g er is s h o Wn in F IG. 1 9. Unl ike
th a t r ep o r ted b y Ch o i ( F IG. 5) , th e m ul til a y er Winding a r r a y
th a t g ener a tes a unif o r m m a g netic ?el d o v er th e c h a r g ing
s ur f a c e ( p r im a r y s y s tem ) c a n b e r ep r es ented a s g r o up s o f
Winding s th a t c a n b e c o nnec ted to th e h ig h - f r eq uenc y AC
inv er ter in s er ies , in p a r a l l el o r a c o m b ina tio n o f b o th . Wh en
th e s ec o nda r y l o a ds a r e p l a c ed o n th e c h a r g ing s ur f a c e, nea r
?el d c o up l ing a nd th er ef o r e ener g y tr a ns f er o c c ur b etWeen
th e c h a r g ing p l a tf o r m a nd th e s ec o nda r y l o a ds .
In s um m a r y , a t l ea s t in its p r ef er r ed f o r m s th is inv entio n
h a s th e f o l l o Wing a dv a nta g eo us f ea tur es . Th e us e o f th e p r o
p o s ed induc tiv e c h a r g ing dev ic e is s im p l e a nd c o m p r is es o nl y
a th in s h eet o f s o f t m a g netic m a ter ia l , a Winding , a s m a l l AC
c a p a c ito r , a dio de r ec ti?er a nd a DC c a p a c ito r ( a nd a n
o p tio na l v o l ta g e r eg ul a to r ) . Th e inv entio n is p a r tic ul a r l y us e
f ul f o r us e With a ny c h a r g ing p l a tf o r m ( s uc h a s th a t s h o Wn in
WO03 / 1 053 08 b ut no t l im ited th er eto ) th a t p r o v ides m a g
netic ?ux p er p endic ul a r to th e c h a r g ing s ur f a c e, th e entir e
a r ea o f th e p r o p o s ed dev ic e c a nb e us ed to p ic k up th eAC?ux .
F o r th e s a m e r ea s o n, th e s tr uc tur e o f th e p r o p o s ed dev ic e c a n
b e o f l o W- p r o ?l e ( i. e. v er y th in, l es s th a n 1 m m ) , m a king it
ea s y to m o unt th e p r o p o s ed p l a na r dev ic e o n th e a c tiv e s ide o f
th e b a tter y ins ide a b a tter y p a c k With o ut inc r ea s ing th e o v er a l l
th ic knes s o f th e b a tter y p a c k s ub s ta ntia l l y . Th is l o W- p r o ?l e
dev ic e c a n b e us ed a s a s ep a r a te c ir c uit to m a ke ex is ting
b a tter ies c o m p a tib l e With th e p l a na r induc tiv e b a tter y c h a r g er
o r c a n b e integ r a ted into neWb a tter y p a c ks . Th e s ec o nda r y
r es o na nt ta nk a l l o Ws a r el a tiv el y l o W s Witc h ing f r eq uenc y to
b e c h o s en s o a s to o p tim iZ e th e c h a r g ing p er f o r m a nc e s uc h a s
im p r o v ed ener g y ef ?c ienc y a nd ener g y tr a ns f er ; r educ ed AC
r es is ta nc e a nd EMT em is s io n. Th e p r o p o s ed dev ic e c a n b e
a dded to ex is ting b a tter y p a c k ex ter na l l y o r integ r a ted into
ex is ting c h a r g ing p r o tec tio n c ir c uit ins ide th e b a tter y p a c k. If
a v o l ta g e do ub l er is us ed a s th e dio de r ec ti?er , a h ig h v o l ta g e
g ener a ted f o r th e c h a r g ing c ir c uit c a n b e h ig h er th a n th a t o f a
s ta nda r d dio de b r idg e.
Th e inv entio n c l a im ed is :
1 . Ab a tter y p a c k f o r a n el ec tr o nic dev ic e c o m p r is ing : o ne
o r m o r e b a tter y c el l s , a b a tter y c h a r g ing c ir c uit, a n ener g y
r ec eiv ing el em ent a da p ted to r ec eiv e p o Wer f r o m a p l a na r
induc tiv e c h a r g ing s y s tem , s a id ener g y r ec eiv ing el em ent
h a v ing a n induc ta nc e, a c a p a c ito r c o nnec ted to s a id ener g y
r ec eiv ing el em ent a nd f o r m ing a r es o na nt ta nk th er eWith , a nd
a dio de r ec ti?er a nd a DCc a p a c ito r c o nnec ted to th e ener g y
r ec eiv ing el em ent to p r o v ide a r ec ti?ed DCv o l ta g e th a t c a n
b e f ed f r o m th e ener g y r ec eiv ing el em ent to s a id b a tter y
c h a r g ing c ir c uit, Wh er ein s a id ener g y r ec eiv ing el em ent c o m
p r is es a g ener a l l y p l a na r th in s o f t m a g netic s h eet a nd a ?r s t
2 0
2 5
3 0
3 5
40
45
50
55
6 0
6 5
1 0
c o il Wo und c ir c um f er entia l l y a r o und th e edg e o f s a id s h eet
s uc h th a t th e c o il l ies in a p l a ne de?ned b y s a id m a g netic
s h eet.
2 . Ab a tter y p a c k a s c l a im ed in c l a im 1 Wh er ein s a id c a p a c i
to r is c o nnec ted in s er ies With s a id ?r s t c o il a nd f o r m s s a id
r es o na nt ta nk With s a id ?r s t c o il a nd s a id m a g netic s h eet.
3 . Ab a tter y p a c k a s c l a im ed in c l a im 1 , f ur th er c o m p r is ing
a s ec o nda r y ener g y r ec eiv ing el em ent c o m p r is ing a s ec o nd
c o il f o r m ed in a p l a ne p a r a l l el to s a id s o f t m a g netic s h eet a nd
Wh er ein s a id s ec o nd c o il is c o nnec ted in p a r a l l el With s a id
?r s t c o il .
4. Ab a tter y p a c k a s c l a im ed in c l a im 3 Wh er ein s a id s ec o nd
c o il is f o r m ed o n a p r inted c ir c uit b o a r d.
5. Ab a tter y p a c k a s c l a im ed in c l a im 4 Wh er ein s a idp r inted
c ir c uit b o a r d is ?x ed to s a id s o f t m a g netic s h eet.
6 . Ab a tter y p a c k a s c l a im ed in c l a im 1 Wh er ein s a id ener g y
r ec eiv ing el em ent c o m p r is es a c o il f o r m ed o n a p r inted c ir c uit
b o a r d.
7. Ab a tter y p a c k a s c l a im ed in c l a im 1 Wh er ein s a id dio de
r ec ti?er is a v o l ta g e do ub l er .
8 . Ab a tter y p a c k a s c l a im ed in c l a im 1 Wh er ein s a id dio de
r ec ti?er a nd s a id DC c a p a c ito r a r e f o r m ed a s p a r t o f th e
b a tter y c h a r g ing c ir c uit.
9. Ab a tter y p a c k a s c l a im ed in c l a im 1 f ur th er c o m p r is ing
a v o l ta g e r eg ul a to r f o r r eg ul a ting th e o utp ut o f th e r ec ti?er to
th e b a tter y c h a r g ing c ir c uit.
1 0. An el ec tr o nic dev ic e p o Wer ed b y a b a tter y p a c k, s a id
b a tter y p a c k c o m p r is ing o ne o r m o r e b a tter y c el l s a nd a
b a tter y c h a r g ing c ir c uit, s a id dev ic e c o m p r is ing a h o us ing ,
m ea ns f o r c o nnec ting s a id b a tter y c h a r g ing c ir c uit to a n ex ter
na l p o Wer a da p to r , a nd s a id dev ic e f ur th er c o m p r is ing a n
ener g y r ec eiv ing el em ent a da p ted to r ec eiv e p o Wer f r o m a
p l a na r induc tiv e c h a r g ing s y s tem a nd f o r s up p l y ing p o Wer to
s a id b a tter y c h a r g ing c ir c uit, s a id ener g y r ec eiv ing el em ent
h a v ing a n induc ta nc e, a nd a n c a p a c ito r c o nnec ted to s a id
ener g y r ec eiv ing el em ent a nd f o r m ing a r es o na nt ta nk th er e
With , Wh er ein s a id ener g y r ec eiv ing el em ent c o m p r is ing a
g ener a l l y p l a na r th in s o f t m a g netic s h eet l o c a ted o n a s ide o f
s a id b a tter y p a c k f a c ing a s ide o f s a id h o us ing a da p ted to b e
r ec eiv ed o n a s a id p l a na r induc tiv e c h a r g ing s y s tem a nd a ?r s t
c o il Wo und c ir c um f er entia l l y a r o und th e edg e o f s a id s h eet
s uc h th a t th e c o il l ies in a p l a ne de?ned b y s a id m a g netic
s h eet.
1 1 . An el ec tr o nic dev ic e a s c l a im ed in c l a im 1 0 f ur th er
c o m p r is ing a s ec o nda r y ener g y r ec eiv ing el em ent c o m p r is ing
a s ec o nd c o il f o r m ed in a p l a ne p a r a l l el to s a id s o f t m a g netic
s h eet a nd Wh er ein s a id s ec o nd c o il is c o nnec ted in p a r a l l el
With s a id ?r s t c o il .
1 2 . An el ec tr o nic dev ic e a s c l a im ed in c l a im 1 1 Wh er ein
s a id s ec o nd c o il is f o r m ed o n a p r inted c ir c uit b o a r d.
1 3 . An el ec tr o nic dev ic e a s c l a im ed in c l a im 1 2 Wh er ein
s a id p r inted c ir c uit b o a r d is ?x ed to s a id s o f t m a g netic s h eet.
1 4. An el ec tr o nic dev ic e a s c l a im ed in c l a im 1 0 Wh er ein
s a id c a p a c ito r is c o nnec ted in s er ies With s a id ?r s t c o il a nd
f o r m s a r es o na nt ta nk With s a id ?r s t c o il a nd s a id m a g netic
s h eet.
1 5. An el ec tr o nic dev ic e a s c l a im ed in c l a im 1 0 Wh er ein
s a id ener g y r ec eiv ing el em ent c o m p r is es a c o il f o r m ed o n a
p r inted c ir c uit b o a r d.
1 6 . An el ec tr o nic dev ic e a s c l a im ed in c l a im 1 0 Wh er ein
s a id dio de r ec ti?er is a v o l ta g e do ub l er .
1 7. An el ec tr o nic dev ic e a s c l a im ed in c l a im 1 0 Wh er ein
s a id dio de r ec ti?er a nd s a id DCc a p a c ito r a r e f o r m ed a s p a r t
o f th e b a tter y c h a r g ing c ir c uit.
1 8 . An el ec tr o nic dev ic e a s c l a im ed in c l a im 1 0 f ur th er
c o m p r is ing a v o l ta g e r eg ul a to r f o r r eg ul a ting th e o utp ut o f th e
r ec ti?er to th e b a tter y c h a r g ing c ir c uit.