BYD Battery-Box HV User Manual
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5.3.1 BCU Interface Introduction (Left Side)
5.3.2 BCU Interface Introduction (Right Side)
5.3.3 BCU Functional Interfaces Definition
No.
Interface Name
Description
1
P+
The system positive terminal, connected to the inverter positive
terminal for battery
2
P-
The system negative terminal, connected to the inverter negative
terminal for battery
3
GND
Grounding terminal, connected to the ground
4
WAN
Connected to the Ethernet, to complete the functions of
communication and remote program update
5
COM
Containing RS485, CAN, and enable signals, outputting 13V power
6
System Air Switch
The main switch of system, which can be operated manually and has
the short circuit protection function
Position
Designation
Left side terminals
A
WAN
B
COM
C
G
D
P-
E
P+
Position
Designation
Right side terminals
A
System Air Switch
