Product Description; Intended Use; Scope Of Delivery; Device Description - Bosch BAT 645 Manual Original

en | 16 | BAT 645 | Product description
3.

Product description

3.1

Intended use

The high-performance battery charger BAT 645
charges all types of 12 V or 24 V lead acid batteries,
e.g. batteries with defined electrolyte (gel technology
or fleece/AGM technology) and lithium iron phosphate
batteries (LFP = LiFePO ) with the aid of the battery
4
management system (BMS). You can charge the
batteries either in the vehicle while installed or when
removed. BAT 645 can also be used to support or
supply the vehicle electrical system.
The BAT 645 is intended for use by automotive
workshops, technical supervisory authorities, petrol
stations and battery retailers.
i
The BAT 645 is only suitable for charging lead-acid
batteries and lithium iron phosphate batteries in
perfect working order with a rated voltage of 12 V
or 24 V.
3.2

Scope of delivery

Designation
BAT 645
3 m power cord
Red/black charging cable (3 m; 6 mm
Wall mounting
Operating instructions BAT 645
User information
Battery service products
3.3

Device description

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5
4
4510026-04_Ko
Fig. 1: Front view BAT 645
1 On/Off switch
2 Power connector
3 Connection socket for red (+)/black (–) charging cable
4 USB connection (customer service only)
5 Selection keys
6 TFT display
7 Red LED for "Mains on", "Incorrect polarity", "Fault or overload"
8 Green LED for "charging operation"
9 Yellow LED for "Back-up mode" and "Buffer mode"
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1 689 989 233 2021-05-02
Order number
See rating plate
1 684 461 195
) 1 687 011 534
2
1 688 005 253
1 689 989 233
1 689 979 946
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8
9
1
2
3
3.3.1

Selection buttons

Key Function
Activate menu/mode
(red LED lights up) or
next menu step
Interruption of charging or
previous menu step
Select menu/mode or
parameter change (increase)
Select menu/mode or
change (decrease) parameter
3.3.2

Status LEDs

Symbol LED Color Status
Red Lit
Flashing
!
Off
Green Rapid
IU
flashing
I
Slow
flashing
aIaI
Lit
Off
Yellow Lit
v
Flashing
v
Off
Status Yellow LED
Gentle charging Flashing
phase for (1 second frequency)
exhausted lead
acid batteries
or pre-charging
phase for LFP
batteries
Function
BAT 645 switched on
and battery connected
Faults, e.g. incorrect
polarity, short-circuit
BAT 645 switched off
Main charging in
progress
Secondary charging in
progress
Trickle charging in
progress
Charging not active
Buffer mode
Back-up mode
Buffer or back-up mode
not active
Green LED
Flashing
(1 second frequency)
Robert Bosch GmbH