B-Box HV Installation Guide

BYD Battery-Box HV User Manual
5.3.1 BCU Interface Introduction (Left Side)
Position
Designation
Left side terminals
A
COM
B
WAN
C
P+
D
P-
E
GND
5.3.2 BCU Interface Introduction (Right Side)
Position
Designation
Right side terminals
A
System Air Switch
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
7