PRESENTATION

BSU
& CHARGERS

BATTERY SUPPORT UNIT

www.gys.fr
MAJ SEPT 2022
What is a BSU* ?

*Battery Support Unit [BSU]

or Stabilized Power Supply
A charger that maintains a vehicle's battery at a perfectly
stabilised voltage. It compensates for the energy demand
during all "ignition on / engine off" work. It is an essential
every-day workshop tool; it guarantees the performance of
the battery and the vehicle's on-board electronics.

2
 SUMMARY

1 The battery; the lifeblood of a vehicle 5

1.1 The battery is the nerve-centre of a vehicle 6
1.2 Why is it important to keep the battery charged? 7
1.3 GYSFLASH PRO; high-performance power sources 8
1.4 Charging is environmentally friendly and economical 9

2 Showroom displays are energy intensive 10

2.1 Presenting a vehicle in a showroom requires an additional energy source 11
2.2 What happens if there is no BSU (Battery Support Unit)? 12
2.3 GYSFLASH PRO, guarantees that vehicles on display are 100% operational! 13
2.4 The brand image of the dealer is protected, and customer satisfaction is improved 14

3 The necessity of a stabilised power supply in the workshop 15

3.1 Diagnostic and reprogramming processes require a stable power supply 16
3.2 The calibration of ADAS sensors is also energy intensive 18
3.3 "Chiptuning" is becoming increasingly popular and requires a significant energy input 19
3.4 What happens if this energy consumption is not compensated for? 20
3.5 GYSFLASH PRO, confidence in a job well done! 21
3.6 Confidence for both the operator and the customer
22
3.7 Other features of the GYSFLASH PRO range
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 SUMMARY
4 Other BSU features 24
4.1 The GYSFLASH PRO CNT range opens new opportunities... 25
4.2 How to adapt the GYSFLASH PRO to meet the needs of professional users 26
4.3 How to keep the GYSFLASH PRO CNT software up to date 27
4.4 Traceability: why keeping track of battery maintenance is a measure of professionalism 28
4.5 How to save or document battery status information 29
4.6 How can vehicle data be collected or recorded more easily? 30
4.7 Keeping track of the battery charge status 31
4.8 CNT Configurator, the path to limitless possibilities... 32
4.9 How to increase the potential of the GYSFLASH PRO CNT with the connected modules 33
4.10 How to remotely control the GYSFLASH PRO CNT 35
4.11 Industry also requires stabilised power supplies 36

5 Maximum protection
37

6 Introduction to the range

38
6.1 The GYSFLASH PRO range
39
6.2 GYSFLASH PRO CNT horizontal range
40
6.3 GYSFLASH PRO CNT vertical range
6.4 Selection Guide 41
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1

THE BATTERY, THE

LIFEBLOOD OF A VEHICLE

5
 1. The battery, the lifeblood of a vehicle
1.1 The battery is the nerve-centre of a vehicle

Modern vehicles incorporate more and more electronics for a variety of reasons:

ENVIRONMENTAL FOR SAFETY FOR COMFORT

Limiting consumption and Airbags, driving aids, etc... Heated seats, on-board computer...
CO2 emissions

Without the battery, none of these features would be possible.

6
1. The battery; the lifeblood of a vehicle
1.2 Why is it important to keep a battery charged?

An AGM battery, especially when used in vehicles with a Stop-Start system, should not be allowed to fall below
50% discharge. Anything below this will shorten the service life of the battery considerably.

1 500 cycles
500 cycles
250 cycles

It is possible to double or even triple the life of a battery by maintaining a 70% charge level (30% discharge).

The battery discharges even when not in use.

Short journeys do not provide a full recharge via the vehicle's alternator, and can even harm a battery if additional power is not supplied
by a charger.
7
1. The battery; the lifeblood of a vehicle
1.3 GYSFLASH PRO; High-performance power sources!

 Up to 120 A
 Charges batteries from 10 to 1800 Ah
 Up to 4 GYSFLASH CNTs can be combined for more power

 Contains 13 predefined charge curves to accommodate all different battery technologies

 Ability to create your own charge curves (ideal for vehicle manufacturers)

 Suitable for different battery voltages: 6, 12, 24, 36 and 48 V

 Suitable for lead and lithium batteries ( including traction batteries)

 "SOS Recovery" - automatic desulphation system

8
 1. The battery; the lifeblood of a vehicle
1.4 Charging is environmentally friendly and economical

ECOLOGICAL
By encouraging regular
recharging of batteries, the
impact on the environment is
significant. The replacement
rate is lower, and leads to a
substantial reduction in
waste.

ECONOMY
A battery can have a
considerable cost.
Increasing the lifespan of a
battery by a factor of 2 or
3, will also reduce the
potential expenditure by
the same amount.

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2

SHOWROOM DISPLAYS ARE

ENERGY-INTENSIVE

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3
2. Showroom displays are energy-intensive
2.1 Presenting a vehicle in a showroon requires an additional energy source

Presenting a vehicle at a dealership is a crucial aspect of a successful sale. However, the operation of the many
electronic elements in the vehicle generates considerable power consumption.

Examples of electricity consumption in a vehicle:

Electric windows Sunroof Indicator lights High-beams

10 to 13 A 15 A 6 to 11 A 8 to 25 A
Depending on technology Depending on technology

Heated seat Electric seat Door locking Windscreen wipers

15 A 3A 22 A 11 to 16 A

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 2. Showroom displays are energy-intensive
2.2 What happens if there is no BSU (Battery Support Unit)?

With the motor off, the only resource for powering the
electronics in the display vehicle is the battery.

Without support, the battery will be discharged rapidly

and the on-board electronics of the display vehicle could
be affected.

The reputation of the dealer would suffer, the sale would

be unlikely, and the cost to the dealer could be very high.

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2. Showroom displays are energy-intensive
2.3 GYSFLASH PRO, guarantees that display vehicles are 100% operational!

The GYSFLASH PRO range:

Compensates for energy Automatically restarts in the

demands up to 120 A event of a power outage

Includes a lock
function to prevent
tampering with the
charger
Fits comfortably under the Replaces the battery if it is not ("Showroom Lock")
vehicle and is very inconspicuous present ("no battery" function)
(disconnectable cables for easy access to the
engine bay)

13
2. Showroom displays are energy-intensive
2.4 The brand image of the dealer is protected, and customer satisfaction is improved

The benefits of a BSU-type battery backup device

are evident:

+ Peace of mind for the dealership, who do not have to worry about the
vehicle's battery health

+ Satisfaction for the potential customer, who had the opportunity to test the
multiple features of the vehicle, and can start to project himself behind the
wheel

+ Investment in a charger/BSU pays for itself very quickly in a professional

environment

+ No vehicle motors running in the showroom

+ An elegant and tidy showroom with a discreet BSU

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3

THE NECESSITY OF A
STABILISED POWER SUPPLY
IN THE WORKSHOP

15
3
 3. The necessity of a stabilised power supply in the workshop
3.1 Diagnostic and reprogramming processes require a stable power supply

Performing workshop procedures on modern vehicles requires two actions

The energy resources required by
that have a significant impact on the battery:
reprogramming are illustrated below:

DURATION
OF THE CONSUMPTION (A)

1 2
ASSIGNMENT

DIAGNOSTIC Engine ECU 30 – 60 min 30 – 50 A 70 – 80 A

REPROGRAMMING
PHASE
(PASS THROUGH) (GET AWAY) HDI engine ECU 30 – 60 min 60 A 100 A

Gearbox ECU 30 – 60 min 20 – 40 A 60 – 70 A

Identifying possible Reprogramming Control/Settings of the lights 30 – 60 min 10 A 25 A

problems of ECUs
Manufacturer update 30 – 60 min 15 – 35 A 60 A

These two stages engage all electronic consumers for several Mapping update 45 min 15 A 40 A

minutes, if not more than an hour.

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3. The necessity of a stabilised power supply in the workshop
3.1 Diagnostic and reprogramming processes require a stable power supply

REPROGRAMMING
~ 150 €
Up to 80

V
ECU’s
/ vehicle

REPLACEMENT
~ from 200 € to 1 500+ €
depending on the damaged unit
+ labour costs

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 3. The necessity of a stabilised power supply in the workshop
3.2 The cablibration of ADAS sensors is also energy intensive

ADAS stands for Advanced Driver Assistance Systems; it is comprised of various electronic driving aids:

ADAPTIVE CRUISE CONTROL (ACC) ADAPTIVE LIGHTS AUTOMATIC EMERGENCY BRAKING (AEB)

automatically adjusts the car's speed and distance designed for safe driving at night or in low assists in improving road safety by quickly identifying
from other vehicles on the road light conditions by following the critical situations and alerting the driver
movements of the steering wheel

BLIND SPOT DETECTION LANE CHANGE ASSIST OR LANE DEPARTURE

TRAFFIC SIGN RECOGNITION
warns when another vehicle or object uses cameras to track whether the driver is detects traffic/road signs
is in the blind spot inadvertently straying from their lane

When work is done on the bodywork or windscreen, the system must be recalibrated. The
operation can take up to 1 hour and generates a peak current of 40 A.
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3. The necessity of a stabilised power supply in the workshop
3.3 "Chiptuning" is becoming more popular, and requires a significant energy input

Reprogramming the ECU, or Engine Control Unit, involves

modifying the engine's electronic management system, or
mapping. This operation, also called "chiptuning" or
"ecotuning", affects the performance of the engine and can
increase its capabilities (power, reduce consumption, switch
to ethanol, etc.) or allow modifications.

The process can take up to 1.5 hours,

and requires a current of 120 A.

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3. The necessity of a stabilised power supply in the workshop
3.4 What happens if this energy consumption is not compensated for?

As with a showroom display, the engine is switched off during these procedures.
If there is no additional power source, the diagnostics and reprogramming may cause:

- A complete and rapid discharge of the battery

- Unusable or damaged ECUs

The loss of time and money can
be significant for the company,
not to mention the customer

- Uncompleted and invalidated tests or reprogramming

dissatisfaction if the vehicle is
returned with a damaged battery.

- Possible need to return the vehicle back to the manufacturer

- A loss of profit

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3. The necessity of a stabilised power supply in the workshop
3.5 GYSFLASH PRO, confidence in a job well done!

The GYSFLASH PRO range

+ Covers power requirements up to 120 A

Maintains a stable voltage throughout the vehicle's electrical systems,

+ regardless of which consumers are being tested. The voltage can be

adjusted from 12V to 14.8V in 0.1V increments, in order to meet the
requirements of different vehicle manufacturers.

+ Automatic warning in case of overconsumption

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 3. The necessity of a stabilised power supply in the workshop
3.6 Confidence for both the user and the customer

The inclusion of a GYSFLASH PRO during a diagnostic or reprogramming

phase does not save time, but it does avoid losing time.

By choosing a product from this range, the user is investing in safe and
worry-free workflow.

The energy requirements of the vehicle are met, the on-board

electronics are preserved, and the user is in control.

The customer can be sure that their vehicle will be returned with the
battery in the best possible condition.

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3. The necessity of a stabilised power supply in the workshop
3.7 Other features of the GYSLFASH PRO range

U2 ADJUSTABLE U2 & I2 max ADJUSTABLE

Transforms the charger/BSU

into a stabilised DC power
Measures the battery supply, outside of the
Saves vehicle memory voltage and checks the automotive environment.
during a battery change. vehicle's starting and The voltage is adjustable in
charging circuit. 0.1V increments, from 1V to
16V or from 1V to 30V,
depending on the GYSFLASH
model.

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4

GYSFLASH PRO CNT:

CONNECTIVITY =
EXPANDING POSSIBILITIES

24
3
 4. GYSFLASH PRO CNT: connectivity = expanding possibilities
4.1 The GYSFLASH PRO connected "CNT" range opens new opportunities...

The increased connectivity on the GYSFLASH PRO CNT extends the range of functionality for professional users:

Traceability or
Configuration of the retention of historical
Power
interface charge data and charge Remote control
multiplication
curves information

Customisation of
Visual and Integration into
Software charge curves
audio feedback (CNT configurator) the manufacturing
update
process

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4. GYSFLASH PRO CNT: connectivity = expanding possibilities
4.2 How to adapt the GYSFLASH PRO to meet the needs of professional users

Whether you are a garage owner, a dealer, an engineer, or simply a user who wants to have access to all the product's features,
each sector has a pre-defined configuration.

13 specific lead/lithium charge curves are available, and accessible using pre-defined configurations.

Through the USB port, it is possible to:

1 2 3

Load one of the predefined

Transfer these
configurations, or import new Save the defined
configurations, or new
ones created beforehand on a configurations
charge curves, to other
computer, via the CNT
GYSFLASH units
configurator

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4. GYSFLASH PRO CNT: connectivity = expanding possibilities
4.3 How to keep the GYSFLASH PRO CNT software up to date

The GYSFLASH PRO CNT is a major development focus for GYS. Following technological
evolutions and understanding customers' needs are crucial in order for us to
continually improve the software of our products.
SMC
USB

The USB port is the input and output point for

updating the GYSFLASH PRO CNT.

These updates are available free of charge at

www.gys.fr.

Once purchased, these chargers/BSUs can

keep up with new developments without the
need to replace the products with new ones.

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4. GYSFLASH PRO CNT: connectivity = expanding possibilities
4.4 Traceability: why keeping track of battery maintenance is
a measure of professionalism

Battery failure is the leading cause for vehicles to be returned to garages.

Prove the quality of the service Protecting yourself from complaints

Without proof of intervention on the battery, Providing traceability of the condition of the
the customer may be left with doubts about battery on entering and leaving the garage
the quality of the service provided by the enables technicians to protect themselves from
technician, which may lead to a possible future any complaints, and to demonstrate that they
breakdown and damage the relationship. are reliable.

Traceability is a key asset when developing customer relations

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 4. GYSFLASH PRO CNT: connectivity = expanding possibilities
4.5 How to save or document battery status data

Up to 1 000 pieces of charge data can be stored on the internal memory of a GYSFLASH PRO CNT.
The information can be exported to a USB stick and is readable on a computer using a spreadsheet (Excel, Numbers, etc.).

The printer is an ideal accessory to document the charge data on a receipt

Ref. 026919
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 4. GYSFLASH PRO CNT: connectivity = expanding possibilities
4.6 How can vehicle data be collected or recorded more easily?

1D / 2D barcode scanner
Ref. 027718
USB AZERTY Mini Keyboard
Ref. 027725

Facilitates data collection and scans: It is connected to the SPM printer

Ref. 026919 and simplifies data entry.
+ The vehicle identification number (VIN) (Available in AZERTY and
QWERTY)
+ The barcode of the battery
+ The CRIT'Air anti-pollution sticker
(information on the number plate, the vehicle
model, the date of first registration, the Euro
standard...)

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4. GYSFLASH PRO CNT: connectivity = expanding possibilities
4.7 Keeping track of the battery charge status

The Smart Light Module (SLM) is the ideal way to monitor the information provided by the
GYSFLASH PRO CNT at a distance

Lead-acid battery charging

Lithium battery charging

Charge complete

Error

Ref. 027978

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 4. GYSFLASH PRO CNT: connectivity = expanding possibilities
4.8 CNT Configurator, the path to limitless possibilities...

Vehicle manufacturers have a very sophisticated knowledge of batteries, and their optimal charging characteristics.
Most of the available solutions on the market do not allow them to fine-tune each stage of the charging process.

Taking this into account, GYS have developed the first online charge curve configurator, accessible free of charge from our website.

Download and install

customized configurations

This provides professional users with a practical system that meets their technical needs, and demonstrates their expertise.
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 4. GYSFLASH PRO CNT: connectivity = expanding possibilities
4.9 How to increase the potential of the GYSFLASH PRO CNT
with the connected modules

120A is not enough? Get more power by paralleling up to 4 GYSFLASH PRO CNT units together

Many situations may require more power, the PHM (Power Hub Module) and SHM (Smart Hub Module) have been engineered to
increase the modularity and power of the GYSFLASH PRO CNT range.

SHM

+
100 A 100 A 100 A 100 A 4 800 Ah

PHM

The PHM combines the power of up to 4 identical GYSFLASH units, and the SHM combines their communication capabilities
(1 GYSFLASH controls the others) 33
4. GYSFLASH PRO CNT: connectivity = expanding possibilities
4.10 How to remotely control the GYSFLASH PRO CNT

For more advanced applications of the GYSFLASH PRO CNT, the Smart USB Module (SUM) and Smart Wireless Module (SWM)
are indispensable accessories; they provide communication between the charger/BSU and the user's computer system
(computer, tablet, etc.).

CNT-SUM Module

Via SMC connection (type DB9) Via USB connection

Wired connection

CNT-SWM Module

Via Bluetooth connection

Via SMC connection (type DB9)

Bluetooth connection
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4. GYSFLASH PRO CNT: connectivity = expanding possibilities
4.10 How to remotely control the GYSFLASH PRO CNT

There are numerous advantages:

Instantaneous transmission of real-time charging information to the computer or tablet

Remote control operation

Real-time monitoring of charger status

CNT-SUM CNT-SWM
Ref. 025974 Ref. 070837

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 4. GYSFLASH PRO CNT: connectivity = expanding possibilities
4.11 Manufacturing also requires stabilized power supplies

There are many applications for stabilized power supplies in manufacturing:

Maintenance of Maintaining
the traction batteries vehicle battery
in pallet trucks, charge levels in
forklifts, etc. distribution
hubs

Integration into
vehicle assembly
lines for power
control
management

Interest in this type of system is growing, and not all possible avenues have been explored yet. GYS are committed to fulfil all the requirements
of the industry.

The GYSFLASH 148.12 & 158.12 CNT have been developed in collaboration with a premium car manufacturer
specifically for integration onto vehicle assembly lines.
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5 Protection is maximized

Anomalous undervoltage protection

Limits the risk of overheating on a failing battery by
Battery overvoltage protection
ceasing the charge in the event of abnormally low Protects the charger in the event of a power surge
voltage (active in BSU mode). from the battery.

Battery disconnection protection

Internal thermal protection of the charger Stops the charge if the battery becomes separated
Protects the charger from internal overheating. from the charger, to ensure that no voltage remains in
the clamps.

Reverse polarity protection Charge time protection

Prevents the possibility of reverse polarity on the Identifies unrecoverable batteries and disables the
battery. charge in order to avoid unnecessary risk of
explosion.

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6

INTRODUCTION
TO THE RANGE

38
3
 6. Presentation of the complete GYSFLASH PRO range
6.1 The GYSFLASH PRO range

+ Horizontal 12 V
+ Vertical 12 V

50 A
30 50 A 100 A

100 A

GYSFLASH 30.12 GYSFLASH 50.12 FV GYSFLASH 100.12

Ref. 029224 Ref. 026056 Ref. 029415

+
Horizontal multi-voltage GYSFLASH 102.12
Ref. 029606

30 A 50 A

GYSFLASH 30.24 (6 / 12 / 24 V) GYSFLASH 50.24 (6 / 12 / 24 V)

Ref. 029231 Ref. 029620

39
 6. Presentation of the complete GYSFLASH PRO range
6.2 The GYSFLASH PRO CNT horizontal range

+ Horizontal 12 V

50 A 100 A 120 A
120 A

GYSFLASH 51.12 CNT FV GYSFLASH 101.12 CNT GYSFLASH 121.12 CNT FV GYSFLASH 125.12 CNT FV
Ref. 068179 Ref. 025790 Ref. 026971 Ref. 028883

+
Horizontal multi-voltage

140 A 150 A
50 A 100 A

GYSFLASH 51.48 CNT FV GYSFLASH 101.24 CNT FV GYSFLASH 148.12 CNT FV GYSFLASH 158.12 CNT FV
(6 / 12 / 24 / 36 / 48 V) (6 / 12 / 24 V) Ref. 069916 Ref. 069909
Ref. 072015 Ref. 025967

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 6. Presentation of the complete GYSFLASH PRO range
6.3 The GYSFLASH PRO CNT vertical range

+ Vertical 12 V

100 A
120 A
GYSFLASH 103.12 CNT GYSFLASH 123.12 CNT FV
Ref. 072008 Ref. 025677

+ Vertical multi-voltage

50 A
100 A

GYSFLASH 53.48 CNT FV GYSFLASH 103.24 CNT FV

(6 / 12 / 24 / 36 / 48 V) (6 / 12 / 24 V)
Ref. 025998 Ref. 025684

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 6. Presentation of the complete GYSFLASH PRO range
6.4 Selection guide - GYS recommendation
Dealers (showroom) Dealers / Garages Body shops Car manufacturers Other industries
GYSFLASH PRO HORIZONTAL
30.12 ★★ ★ ★ ★
50.12 FV ★★★ ★★ ★★ ★
100.12 ★★★★ ★★★ ★★★ ★
30.24 ★★ ★ ★ ★ ★
50.24 ★★★ ★★ ★★ ★ ★★

GYSFLASH PRO VERTICAL

102.12 ★ ★★★ ★★★ ★

GYSFLASH PRO CNT HORIZONTAL

51.12 CNT FV ★★★ ★★ ★★ ★★★ ★
101.12 CNT ★★★★ ★★★ ★★★ ★★★ ★
121.12 CNT FV ★★★ ★★★★ ★★★★ ★★ ★
125.12 CNT FV ★★★ ★★★★ ★★★★ ★★★ ★
128.12 CNT FV ★ ★★★★ ★★★★ ★★★★ ★
158.12 CNT FV ★ ★★★★ ★★★★ ★★★★ ★
101.24 CNT FV ★★ ★★★★ ★★★★ ★★ ★★★
51.48 CNT FV ★★ ★★ ★★ ★★★ ★★★★

GYSFLASH PRO CNT VERTICAL

103.12 CNT ★ ★★★ ★★★ ★★★ ★
123.12 CNT FV ★ ★★★★ ★★★★ ★★★ ★
103.24 CNT FV ★ ★★★★ ★★★★ ★★★ ★★★★
23.48 CNT ★ ★ ★ ★★★ ★★★★
53.48 CNT ★ ★★ ★★ ★★★ ★★★★

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 GYS France – Headquarters
1, rue de la croix des Landes
CS 51159
53941 SAINT-BERTHEVIN Cedex
Laval – France
Tel : +33 2 43 01 23 60
E-mail : service.client@gys.fr

LOGISTICS CENTRE
www.gys.fr 2, rue Jean Dausset
53910 Changé – France
Tel : +33 2 43 01 54 33 Go behind the scenes of
the company in video