Bcu Module (battery control unit) BMS 12V

Min.Order: 100

Product origin: Shenzhen, Guangdong, China

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US$ 10

Description

BCU instructions

BCU module

User's Manual

[20178][V1.0]

Catalog
1 Product introduction 1
2 main features 1
3 Product Appearance Chart 1
4 technical parameter 2
5 Interface definition 2
1,Description of P1(2*6) Joint Definition 2
2,Description of P2(2*8) Joint Definition 3
3,Definition of P3(2*10) Joints 3
4,Description of P4(2*3) Joint Definition 4
6 General wiring schematic diagram 5

1 Product introduction

BCU is the main controller of battery management system. By collecting the information of cell voltage, temperature and current sensor collected by slave BSU, it can make intelligent protection control. It has the advantages of strong anti-interference ability and high reliability. It can be applied to lithium batteries with different chemical properties, such as ternary materials, lithium iron phosphate, lithium titanate, nickel-hydrogen batteries, etc. It is used in various bus electric vehicles, power station energy storage, logistics vehicles and other occasions.

2 main features

Maximum support for 16 slave BSU sampling and management.
High-precision charging and discharging current sampling.
Insulation Monitoring.
Hardware battery overvoltage, undervoltage, overtemperature protection.
Intelligent estimation of battery SOC based on battery voltage and current.
Supports two CAN communications, one with the vehicle controller, one with the charger.
Support two RS485 communications, one communication with the host computer (or display screen).
There are six relay outputs.
2-way switch signal input.
Support CC, CP, CC2, ON, CHG_P signal detection and activation of charging gun.
Support can online upgrade.

3 Product Appearance Chart

4 technical parameter

parameter	Typical	Min	Max.	Unit
BCU supply voltage	12V	10	18	V
BCU power consumption	/	/	3	W
SOC Estimation error	±5	0	8	%
Accuracy of current acquisition	2	0	2	%
Precharge	Support	/	/	/
Total Pressure Detection Range	100	40	200	V
Total Pressure Detection Accuracy	±2		±5	%
Insulation Resistance Detection Range		0	1000	kΩ
Insulation Resistance Detection Accuracy	±5	±2	±8	kΩ
Support slave BSU number	2	1	16
Contact capacity of 6-way relay	3	/	3	A
2-way Input Switching Signal Detection	/	8	12	V
1-way RS485 communication
2-way CAN communication
Working temperature range	/	-30	70	ºC
Storage temperature	/	-40	85	ºC
relative humidity	/	40	95	%
Anti-EMI Range	/	150KHZ	1000MHZ	HZ

5. Interface definition

**1,Description of P1(2*6) Joint Definition**

Introduction of P1(2*6) pin Plug type:molex 64002-1215 Type of crimping terminal:molex 50654-1001
NO.	PN.	direction	Function description	parameter
5,6	POWER+	Input	Host power supply interface	Input voltage range 8V~18V
10,11,12	POWER-	Input	Host power supply interface	Input voltage range 8V~18V
4	P-12V	Output	Power Supply to Current Sensor	/
3	P+12V	Output	Power Supply to Current Sensor	/
2	ISensor	Input	Current Sensor Output Signal	-4V~+4V
1	PGND	Output	Ground of Current Sensor	/
7	CHG_P+	Input	Charger + 12V	/
8	LCD_P+	Output	Display screen power supply	/
9	LCD_P-	Output	Display screen power supply	/

2,Description of P2(2*8) Joint Definition

Introduction of P2(2*8) pins Plug type: molex 35563-1615 Type of crimping terminal: molex 50654-1001
NO.	PN.	direction	Function description	connection to
8	ISOSPI-L	/	Master-slave internal communication interface	BSU Minimum Serial Slave J1:4 IN_MI
16	ISOSPI-H	/	Master-slave internal communication interface	BSU Minimum Serial Slave J1:3 IN_PI
7	T4+	Input	Temperature Detection of Fast Filling Pin	/
6	T3+	Input		/
15	T4-/T3-	Input		/
14	T1-/T2-	Input	Temperature Detection of Slow Filling Needle	/
13	T1+	Input		/
12	T2+	Input		/
5	LCD485-A	/	RS485 Communication Interface for Touch Screen	LCD_485_A
4	LCD485-B	/	RS485 Communication Interface for Touch Screen	LCD_485_B
3	CAN1_GND	/	Vehicle CAN Communication Interface Matched 120_Resistor	CAN_GND
2	CAN1_L	/		CAN_L
1	CAN1_H	/		CAN_H
11	CAN2_GND	/	Charger CAN Communication Interface Matched 120_Resistor	CAN_GND
10	CAN2_L	/		CAN_L
9	CAN2_H	/		CAN_H

**3,Definition of P3(2*10) Joints**

Introduction of P3 (2*10) pins Plug type: molex 35564-2015 Type of crimping terminal:molex 50654-1001
NO.	PN.	direction	Function description	parameter
10	K6COM	Output	Passive output of relay Permissible Charging: Closed No Charging: Disconnect	Charger Enablation
20	K6NO	Output		Charger Enablation
9	K5OM	Output	Passive output of relay Allowed Motor Controller: Closed No Motor Controller: Disconnect	Motor Controller Enablation
19	K5NO	Output		Motor Controller Enablation
8	K4OM	Output	Passive output of relay Allowable Heating Relay: Closed No Heating Relay: Disconnect	Heating and refrigeration Control Relay
18	K4NO	Output		Heating and refrigeration Control Relay
7	K3OM	Output	Passive output of relay Precharging process: closure Precharge End: Disconnection	Precharging relay control
17	K3NO	Output		Precharging relay control
6	K2OM	Output	Passive output of relay Allowable discharge: closure No Discharge: Disconnect	Discharge relay control
16	K2NO	Output		Discharge relay control
5	K1OM	Output	Passive output of relay Permissible Charging: Closed No Charging: Disconnect	Charging relay control
15	K1NO	Output		Charging relay control
4	READY	Output	CHARG_READY
14	SW1_G	Input	Input Switch Signal 1 Detection Ground
3	SW1,SW2	Input	High Detection of Input Switch Signal
13	SW2G	Input	Input Switch Signal 1 Detection Ground
2	AC-CP	Input	AC Charging Gun PWM Detection Interface	<=1KHZ
12	ON	Input	Start Switch Signal Detection Interface	+12V
1	CC2	Input	DC Charging Gun Detection Interface	4 V ~7 V
11	ACC-CC	Input	AC Charging Gun Detection Interface	1 V ~9V

**4,Description of P4(2*3) Joint Definition**

Introduction of P4(2*3) pins Plug type:molex 39-01-2030 Type of crimping terminal:molex 39-00-0077
NO.	PN.	direction	Function description	parameter
1	HV2+	Input	Charging total	/
2	HV1+	Input	Total load	/
3	BAT_HV+	Input	Battery pack alignment	/
4	BAT_HV-	Input	Total negative battery pack	/
5	HV1-	Input	Total load	/
6	PG	Input	Frame ground	/