Biu Interface Definition - Deligreen BI51 User Manual

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3.2 BIU interface definition

There are 3 types of BIU in BI51series: BI5116, BI5132, BI5148.They have same function except
different collecting cells number. Below we take BI5148 as example.
ST1
Board connector
Line connector
Name in
Pin
stick
40 12V+
39 CHG_12V+
38 KeyOn
37 CC2
36 HALL_IN2
35 CS_5V+ Current sensor power 5V+
Charge interface temperature
34 NTC1-
Charge interface temperature
33 NTC2-
32 CAN0_L
31 CAN1_L
30 CAN2_L
29 485B
28 V_GND Vehicle Frame connection
27 12V-
26 RL7_H High level drive, default
25 RL5_H
High level drive, default
24 RL4-
23 RL3-
22 RL2-
21 RL1-
ST1~ST4 position and interface sequence
ST1 interface
Type：MX34040NF2
Type：MX34040SF1
Description
BMS INPUT 12V+
12 V Charger Wakeup
Key-On
GB fast charge CC2
Hall signal input 2
detection 1-
detection 2-
Inner CAN-bus low
Discharge CAN-bus low
Charge CAN-bus low
Display RS485B
BMS INPUT 12V-
reserved
reserved
Heating relay 12V-
Charge relay 12V-
Pre-charge relay 12V-
Discharge relay 12V-
ST2 interface
BI51 Type User Manual V2.4
ST2 ST3
Terminal type：M34S75C4F2
Name in
Pin
stick
20
12V+
19
CP
18
CC
17
HALL_IN1
16
CS_5V-
15
NTC1+
14
NTC2+
13
CAN0_H
12
CAN1_H
11
CAN2_H
10
485A
9
485GND
8
LCD_12V-
7
CHG_12V-
6
High level drive, default
RL8_H
5 High level drive, default
RL6_H
4
RL4+
3
RL3+
2
RL2+
1
RL1+
13
ST4
Brand：JAE
Description
BMS INPUT 12V+
GB slow charge CP
GB slow charge CC
Hall signal input 1
Current sensor power 5V-
Charge interface temperature
detection 1+
Charge interface temperature
detection 2+
Inner CAN-bus high
Discharge CAN-bus high
Charge CAN-bus hign
Display RS485A
Display RS485GND
Display power 12V-
Charger input 12V-
reserved
reserved
Heating relay 12V+
Charge relay 12V+
Pre-charge relay 12V+
Discharge relay 12V+