Universal Standard Service, Inc.

Project No.: ASL21111217 Report No.: ASL21111217

UN 38.3 Test Report

Lithium ion Battery Pack

Applicant: TOYOTA MOTOR CORPORATION

Model: BTO-074B
Rated Voltage: 25.2 Vdc
Rated Capacity: 13200 mAh / 336 Wh
Configuration: 7S4P
Cell Mfg. / Type: Panasonic Industrial Devices Sales
Taiwan Co., Ltd. / NCR18650GA
Date of issue: 2022-02-24

Prepared by Paul Chang

Reviewed by Rex Ni

The results relate only to the items tested.

The report shall not be reproduced except in full without approval of the laboratory.
Statement of conformity: The judgment rules of test results based on the judgment
requirements of test standard(s), and measurement uncertainties do not be considered.

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Project No.: ASL21111217 Report No.: ASL21111217

Application and Test information

Manual of Tests and Criteria
Test Standard
ST/SG/AC.10/11/ Rev.7, Section 38.3

Manufacturer Mobile Energy Technology Co.,Ltd.

Manufacturer #13,Kong 9th Road,2nd Industrial Park,LinKou District,New Taipei

Address City,Taiwan,R.O.C.244

Testing Laboratory Universal Standard Service, Inc.

Testing Location/ No. 1196-9, Sec. 1, Zhongyi Road, Guishan District, Taoyuan City,
Address 33372, Taiwan
Date (s) of Test
Date of Receipt 2021-11-15 2021-12-06~2022-01-10
Period
Rechargeable
Parts Name Lithium-Ion Battery Quantity 16 pieces
Pack

1. Test Summary:
Item Test Item Test Result Details
T.1 Altitude simulation test (UN 38.3.4.1) P Page 04

T.2 Thermal test (UN 38.3.4.2) P Page 05

T.3 Vibration test (UN 38.3.4.3) P Page 06

T.4 Shock test (UN 38.3.4.4) P Page 07~08

T.5 Short Circuit test (UN 38.3.4.5) P Page 09

T.6 Impact / Crush test (UN 38.3.4.6) N/A --

T.7 Overcharge test (UN 38.3.4.7) P Page 13

T.8 Forced discharge test (UN 38.3.4.8) N/A --

Possible test case verdicts:
Test case does not apply to the test object : N/A
Test object does meet the requirement : P (Pass)
Test object does not meet the requirement : F (Fail)
Result summary:
All applicable tests according to the referenced standard have been carried out and pass.

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Project No.: ASL21111217 Report No.: ASL21111217

2. Test sample list:

Sample No.
Test Item
for Cell / Batteries
T.1~T.5,
001~004
first cycle, fully charged state
T.1~T.5
005~008
25th cycle, fully charged state
T.6
--
first cycle, 50% charged state
T.6
--
25th cycle, 50% charged state
T.7
009~012
first cycle, fully charged state
T.7
013~016
25th cycle, fully charged state
T.8
--
first cycle, fully discharged state
T.8
--
25th cycle, fully discharged state
Cell or Battery mass (g) Approx. 2330

Mass loss means a loss of mass that exceeds the values in Table 38.3.1 below.

Where M1 is the mass before the test and M2 is the mass after the test. When mass loss does
not exceed the values in Table 38.3.1, it shall be considered as "no mass loss".

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Project No.: ASL21111217 Report No.: ASL21111217

3. Test record:
Section 38.3.4.1 Test T.1: Altitude simulation
Purpose This test simulates air transport under low-pressure conditions.
Test Test cells and batteries shall be stored at a pressure of 11.6 kPa or less for at
procedure least six hours at ambient temperature (20 ± 5 °C).
4 batteries at first cycle, in fully charged state. (Sample No. 001~004)
Sample(s)
4 batteries after 25 cycles ending in fully charged state. (Sample No. 005~008)
Before Test After Test Difference
Sample
Open-circuit Weight Open-circuit Weight Voltage Weight Results
No.
voltage (V) (g) voltage (V) (g) (%) (%)
001 28.48 2336.0 28.47 2336.0 0.04% 0.00% Pass
002 28.62 2335.0 28.62 2335.0 0.00% 0.00% Pass
003 28.62 2328.5 28.62 2328.5 0.00% 0.00% Pass
004 28.64 2341.0 28.64 2341.0 0.00% 0.00% Pass
005 28.60 2337.5 28.60 2337.5 0.00% 0.00% Pass
006 28.49 2330.0 28.49 2330.0 0.00% 0.00% Pass
007 28.57 2332.5 28.57 2332.5 0.00% 0.00% Pass
008 28.63 2328.0 28.63 2328.0 0.00% 0.00% Pass
No mass loss (<_0.1_%), no leakage, no venting, no disassembly, no
Judge Criteria
rupture and no fire. Cells / Batteries open circuit voltage not less than 90%.

Test Period Start: 2021-12-21 10:15 End: 2021-12-21 16:15

Test Equipment I00305, I00664, I00686, I00707, I00722, I00723, I00724, I00725, I00749

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Project No.: ASL21111217 Report No.: ASL21111217

Section 38.3.4.2 Test T.2: Thermal test

This test assesses cell and battery seal integrity and internal electrical
Purpose connections. The test is conducted using rapid and extreme temperature
changes.
Test cells and batteries are to be stored for at least six hours at a test
temperature equal to 72 ± 2 °C, followed by storage for at least six hours at a
test temperature equal to - 40 ± 2 °C. The maximum time interval between test
Test temperature extremes is 30 minutes. This procedure is to be repeated until 10
procedure total cycles are complete, after which all test cells and batteries are to be stored
for 24 hours at ambient temperature (20 ± 5 °C). For large cells and batteries
the duration of exposure to the test temperature extremes should be at least 12
hours.
4 batteries at first cycle, in fully charged state. (Sample No. 001~004)
Sample(s)
4 batteries after 25 cycles ending in fully charged state. (Sample No. 005~008)
Before Test After Test Difference
Sample
Open-circuit Weight Open-circuit Weight Voltage Weight Results
No.
voltage (V) (g) voltage (V) (g) (%) (%)
001 28.47 2336.0 28.20 2335.0 0.95% 0.04% Pass
002 28.62 2335.0 28.45 2333.5 0.59% 0.06% Pass
003 28.62 2328.5 28.45 2327.5 0.59% 0.04% Pass
004 28.64 2341.0 28.45 2340.0 0.66% 0.04% Pass
005 28.60 2337.5 28.43 2335.5 0.59% 0.09% Pass
006 28.49 2330.0 28.26 2329.0 0.81% 0.04% Pass
007 28.57 2332.5 28.38 2331.5 0.67% 0.04% Pass
008 28.63 2328.0 28.47 2327.0 0.56% 0.04% Pass
No mass loss (<_0.1_%), no leakage, no venting, no disassembly, no
Judge Criteria
rupture and no fire. Cells / Batteries open circuit voltage not less than 90%.

Test Period Start: 2021-12-21 16:30 End: 2021-12-28 16:30

Test Equipment I00305, I00664, I00686, I00705, I00749

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Project No.: ASL21111217 Report No.: ASL21111217

Section 38.3.4.3 Test T.3: Vibration

Purpose This test simulates vibration during transport.
Cells and batteries are firmly secured to the platform of the vibration machine
without distorting the cells in such a manner as to faithfully transmit the
vibration. The vibration shall be a sinusoidal waveform with a logarithmic sweep
between 7 Hz and 200 Hz and back to 7 Hz traversed in 15 minutes. This cycle
shall be repeated 12 times for a total of 3 hours for each of three mutually
perpendicular mounting positions of the cell. One of the directions of vibration
Test
must be perpendicular to the terminal face.
procedure

For cells and small batteries: from 7 Hz a peak acceleration of 1 gn is

maintained until 18 Hz is reached. The amplitude is then maintained at 0.8 mm
(1.6 mm total excursion) and the frequency increased until a peak acceleration
of 8 gn occurs (approximately 50 Hz). A peak acceleration of 8 gn is then
maintained until the frequency is increased to 200 Hz.
4 batteries at first cycle, in fully charged state. (Sample No. 001~004)
Sample(s)
4 batteries after 25 cycles ending in fully charged state. (Sample No. 005~008)
Before Test After Test Difference
Sample
Open-circuit Weight Open-circuit Weight Voltage Weight Results
No.
voltage (V) (g) voltage (V) (g) (%) (%)
001 28.20 2335.0 26.53 2335.0 5.92% 0.00% Pass
002 28.45 2333.5 28.41 2334.0 0.14% 0.02% Pass
003 28.45 2327.5 28.42 2328.0 0.11% 0.02% Pass
004 28.45 2340.0 28.42 2340.0 0.11% 0.00% Pass
005 28.43 2335.5 28.40 2336.0 0.11% 0.02% Pass
006 28.26 2329.0 28.23 2329.0 0.11% 0.00% Pass
007 28.38 2331.5 28.34 2331.5 0.14% 0.00% Pass
008 28.47 2327.0 28.45 2327.0 0.07% 0.00% Pass
No mass loss (<_0.1_%), no leakage, no venting, no disassembly, no
Judge Criteria
rupture and no fire. Cells / Batteries open circuit voltage not less than 90%.

Test Period Start: 2021-12-29 End: 2022-01-04

Test Equipment I00305, I00664, I00686, I00708, I00749

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Project No.: ASL21111217 Report No.: ASL21111217

Section 38.3.4.4 Test T.4: Shock

This test assesses the robustness of cells and batteries against cumulative
Purpose
shocks.
Test cells and batteries shall be secured to the testing machine by means of a
rigid mount which will support all mounting surfaces of each test battery.
Each cell shall be subjected to a half-sine shock of peak acceleration of 150 gn
and pulse duration of 6 milliseconds. Alternatively, large cells may be subjected
to a half-sine shock of peak acceleration of 50 gn and pulse duration of 11
milliseconds.
Test Each battery shall be subjected to a half-sine shock of peak acceleration
procedure depending on the mass of the battery. The pulse duration shall be 6
milliseconds for small batteries and 11 milliseconds for large batteries. The
formulas below are provided to calculate the appropriate minimum peak
accelerations.
Each cell or battery shall be subjected to three shocks in the positive direction
and to three shocks in the negative direction in each of three mutually
perpendicular mounting positions of the cell or battery for a total of 18 shocks.
4 batteries at first cycle, in fully charged state. (Sample No. 001~004)
Sample(s)
4 batteries after 25 cycles ending in fully charged state. (Sample No. 005~008)
Before Test After Test Difference
Sample
Open-circuit Weight Open-circuit Weight Voltage Weight Results
No.
voltage (V) (g) voltage (V) (g) (%) (%)
001 26.53 2335.0 26.35 2335.0 0.68% 0.00% Pass
002 28.41 2334.0 28.42 2334.0 0.04% 0.00% Pass
003 28.42 2328.0 28.42 2328.0 0.00% 0.00% Pass
004 28.42 2340.0 28.42 2340.0 0.00% 0.00% Pass
005 28.40 2336.0 28.40 2336.0 0.00% 0.00% Pass
006 28.23 2329.0 28.23 2329.0 0.00% 0.00% Pass
007 28.34 2331.5 28.34 2332.0 0.00% 0.02% Pass
008 28.45 2327.0 28.45 2327.5 0.00% 0.02% Pass
No mass loss (<_0.1_%), no leakage, no venting, no disassembly, no
Judge Criteria
rupture and no fire. Cells / Batteries open circuit voltage not less than 90%.

Test Period Start: 2022-01-04 End: 2022-01-04

Test Equipment I00664, I00686, I00706, I00749

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Project No.: ASL21111217 Report No.: ASL21111217

Small batteries (150 gn or result of formula whichever is smaller):

Minimum Peak
Mass: 2.33 (kg),
Acceleration
Acceleration (gn)= √(100850/mass) = 208.05_

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Project No.: ASL21111217 Report No.: ASL21111217

Section 38.3.4.5 Test T.5: External short circuit

Purpose This test simulates an external short circuit.
The cell or battery to be tested shall be heated for a period of time necessary to
reach a homogeneous stabilized temperature of 57 ± 4 °C, measured on the
external case. This period of time depends on the size and design of the cell or
battery and should be assessed and documented. If this assessment is not
feasible, the exposure time shall be at least 6 hours for small cells and small
batteries, and 12 hours for large cells and large batteries. Then the cell or
Test battery at 57 ± 4 °C shall be subjected to one short circuit condition with a total
procedure external resistance of less than 0.1 ohm.
This short circuit condition is continued for at least one hour after the cell or
battery external case temperature has returned to 57 ± 4 °C, or in the case of
the large batteries, has decreased by half of the maximum temperature increase
observed during the test and remains below that value.
The short circuit and cooling down phases shall be conducted at least at
ambient temperature.
Cells / Batteries case max.
Sample No. Open-circuit voltage (V) Results
temperature (°C)
001 26.35 56.8 Pass
002 28.42 57.0 Pass
003 28.42 56.3 Pass
004 28.42 56.6 Pass
005 28.40 56.2 Pass
006 28.23 56.5 Pass
007 28.34 56.5 Pass
008 28.45 55.6 Pass
o
Cells / Batteries exterior peak temperature <170 C.
Judge Criteria No disassembly, No rupture and No fire.

Test Period Start: 2022-01-06 End: 2022-01-10

Observed Time Start: 2022-01-10 10:00 End: 2022-01-10 16:00

Test Equipment I00064, I00263, I00305, I00480, I00607, I00749

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Project No.: ASL21111217 Report No.: ASL21111217

Section 38.3.4.6 Test T.6: Impact / Crush

These tests simulate mechanical abuse from an impact or crush that may result
Purpose
in an internal short circuit.
Test procedure – Impact
(applicable to cylindrical cells not less than 18.0 mm in diameter)
NOTE: Diameter here refers to the design parameter (for example the diameter
of 18 650 cells is 18.0 mm).
The test sample cell or component cell is to be placed on a flat smooth surface.
A 15.8 mm ± 0.1 mm diameter, at least 6 cm long, or the longest dimension of
the cell, whichever is greater, Type 316 stainless steel bar is to be placed
across the centre of the sample. A 9.1 kg ± 0.1kg mass is to be dropped from a
height of 61 ± 2.5 cm at the intersection of the bar and sample in a controlled
manner using a near frictionless, vertical sliding track or channel with minimal
drag on the falling mass. The vertical track or channel used to guide the falling
mass shall be oriented 90 degrees from the horizontal supporting surface.
The test sample is to be impacted with its longitudinal axis parallel to the flat
surface and perpendicular to the longitudinal axis of the 15.8 mm ± 0.1 mm
diameter curved surface lying across the centre of the test sample. Each sample
Test is to be subjected to only a single impact.
procedure Test Procedure – Crush (applicable to prismatic, pouch, coin/button cells and
cylindrical cells less than 18.0 mm in diameter)
NOTE: Diameter here refers to the design parameter (for example the diameter
of 18650 cells is 18.0 mm).
A cell or component cell is to be crushed between two flat surfaces. The
crushing is to be gradual with a speed of approximately 1.5 cm/s at the first point
of contact. The crushing is to be continued until the first of the three options
below is reached.
(a) The applied force reaches 13 kN ± 0.78 kN;
Example: The force shall be applied by a hydraulic ram with a 32 mm diameter
piston until a pressure of 17 MPa is reached on the hydraulic ram.
(b) The voltage of the cell drops by at least 100 mV; or
(c) The cell is deformed by 50% or more of its original thickness.
Once the maximum pressure has been obtained, the voltage drops by 100 mV
or more, or the cell is deformed by at least 50% of its original thickness, the
pressure shall be released.

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Project No.: ASL21111217 Report No.: ASL21111217

A prismatic or pouch cell shall be crushed by applying the force to the widest
side. A button/coin cell shall be crushed by applying the force on its flat
surfaces. For cylindrical cells, the crush force shall be applied perpendicular to
the longitudinal axis.
Each test cell or component cell is to be subjected to one crush only. The test
sample shall be observed for a further 6 h. The test shall be conducted using
test cells or component cells that have not previously been subjected to other
tests.

Impact Test (applicable to cylindrical cells not less than 18 mm in diameter)

Open-circuit voltage at before test Cell case max. temperature

Sample No. Results
(V) (oC)

-- -- -- --
-- -- -- --
-- -- -- --
-- -- -- --
-- -- -- --
-- -- -- --
-- -- -- --
-- -- -- --
-- -- -- --
-- -- -- --
External temperature of cell does not exceed 170oC and there is no
Judge Criteria
disassembly and no fire within 6 hours of the test.
Test Period Start: -- End: --

Observed Time Start: -- End: --

Test Equipment --

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Project No.: ASL21111217 Report No.: ASL21111217

Crush Test (applicable to prismatic, pouch, coin/button cells and cylindrical cells less than 18
mm in diameter)
Measured Measured
Open-circ Open-circ Measured Cell case
width / width /
Sample uit voltage uit voltage maximum max.
diameter of diameter of Results
No. at start of at removal force of temperature
cells before cells after
test (V) of test (V) test (kN) (oC)
crush (mm) crush (mm)
-- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --
-- -- -- -- -- -- -- --
External temperature of cell does not exceed 170oC and there is no
Judge Criteria
disassembly and no fire within 6 hours of the test.
Test Period Start: -- End: --

Observed Time Start: -- End: --

Test Equipment --

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Project No.: ASL21111217 Report No.: ASL21111217

Section 38.3.4.7 Test T.7: Overcharge

This test evaluates the ability of a rechargeable battery or a single cell
Purpose
rechargeable battery to withstand an overcharge condition.
The charge current shall be twice the manufacturer's recommended maximum
continuous charge current. The minimum voltage of the test shall be as follows:

(a) When the manufacturer's recommended charge voltage is not more than
18 V, the minimum voltage of the test shall be the lesser of two times the
Test maximum charge voltage of the battery or 22 V.
procedure (b) When the manufacturer's recommended charge voltage is more than 18 V,
the minimum voltage of the test shall be 1.2 times the maximum charge
voltage.

Tests are to be conducted at ambient temperature. The duration of the test shall
be 24 hours.
Sample Charge voltage Charge current Battery pack enclosure max.
Results
No. (V) (A) temperature (oC)
009 34.44 10 23.1 Pass
010 34.44 10 23.0 Pass
011 34.44 10 22.9 Pass
012 34.44 10 23.0 Pass
013 34.44 10 24.2 Pass
014 34.44 10 21.2 Pass
015 34.44 10 21.0 Pass
016 34.44 10 21.0 Pass

Rechargeable batteries meet this requirement if there is no disassembly

Judge Criteria
and no fire during the test and within seven days after the test.
Start: 2021-12-23 11:12 End: 2021-12-24 11:12
Test Period
Start: 2021-12-27 13:08 End: 2021-12-28 13:08
Start: 2021-12-24 11:15 End: 2021-12-31 11:15
Observed Time
Start: 2021-12-28 13:11 End: 2021-01-04 13:11

Test Equipment I00263, I00267, I00305, I00480, I00607, I00676, I00749

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Project No.: ASL21111217 Report No.: ASL21111217

Section 38.3.4.8 Test T.8: Forced discharge

This test evaluates the ability of a primary or a rechargeable cell to withstand a
Purpose
forced discharge condition.
Each cell shall be forced discharged at ambient temperature by connecting it in
series with a 12V D.C. power supply at an initial current equal to the maximum
Test discharge current specified by the manufacturer.
The specified discharge current is to be obtained by connecting a resistive load of
procedure the appropriate size and rating in series with the test cell. Each cell shall be
forced discharged for a time interval (in hours) equal to its rated capacity divided
by the initial test current (in ampere).
Sample No. Open-circuit voltage (V) Reverse charge current (A) Test time (Hour) Results
-- -- -- -- --
-- -- -- -- --
-- -- -- -- --
-- -- -- -- --
-- -- -- -- --
-- -- -- -- --
-- -- -- -- --
-- -- -- -- --
-- -- -- -- --
-- -- -- -- --
-- -- -- -- --
-- -- -- -- --
-- -- -- -- --
-- -- -- -- --
-- -- -- -- --
-- -- -- -- --
-- -- -- -- --
-- -- -- -- --
-- -- -- -- --
-- -- -- -- --
Judge Criteria No disassembly, no fire within seven days of the test.
Test Period Start: -- End: --
Test Equipment Start: -- End: --

Test Equipment --

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