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  • Product Name: 4S-24S 400A 500A 600A relay Active BMS with display
  • Subtitle:
  • ENJBMS high current relay type 400A 500A 600A active balance BMS 4S-24S(12V to 100.8V) is high quality smart active balancing relay BMS, designed for 4S-24S(12V to 100.8V) battery packs lifepo4/LTO/Sodium-ion/Li-ion widely applicated on golf cart, AGV, low speed vehicle,battery-powered hanlding machines, active balancing current 0-2A. Optional functions:heat function, communications:RS485/CANBus/RS232, and Bluetooth module, display module, etc..

Inquiry


Technical Specification

Model No.

ENJBMS2A24SR400

ENJBMS2A24SR600

Lithium iron string number

4～24

4～24

Equalization mode

Active equalization

Equalizing current

0~2A

0~2A

Continuous discharge current

400A

600A

Maximum discharge current

600A

800A

Overcurrent protection (adjustable)

650A

850A

Outlet mode

Common port

Overcharge Protection Voltage(Adjustable)

3.65V or 4.2V or 3.0V or 3.9V(Adjustable to fit LTO/Sodium-ion/NMC/LiFePO4)

Overcharge release voltage(adjustable)

3.50V(Adjustable to fit LTO/Sodium-ion/NMC li-ion/LiFePO4 cell)

Over-discharge protection voltage(adjustable)

2.50V(Adjustable to fit LTO/Sodium-ion/NMC li-ion/LiFePO4 cell)

Over-discharge recovery voltage(adjustable)

3.00V(Adjustable to fit LTO/Sodium-ion/NMC li-ion/LiFePO4 cell)

Temperature interface

YES

Short circuit protection

YES

Coulomb Meter Algorithm

YES

Display interface

Optional

RS485 communication interface

Optional

RS232 communication interface

Optional

CAN communication interface

Optional

Heating interface

Optional

Bluetooth interface

Optional

Charge current limit function

Optional

Maximum number of temperature detection

Optional






Connector

Interface name

Pin number

EJBMS2A24SR400/600

Name

Definition

P1

Balance and acquisition interface

1

B0

Negative terminal of the 1stbattery string

2

B1

Positive terminal of the 1st battery string

3

B2

Positive terminal of the 2nd battery string

4

B3

Positive terminal of the 3rdbattery string

5

B4

Positive terminal of the 4thbattery string

6

B5

Positive terminal of the 5thbatterystring

7

B6

Positive terminal of the 6thbattery string

8

B7

Positive terminal of the 7thbattery string

9

B8

Positive terminal of the 8thbattery string

10

B9

Positive terminal of the 9thbattery string

11

B10

Positive terminal of the 10thbattery string

12

B11

Positive terminal of the 11thbattery string

13

B12

Positive terminal of the 12thbattery string

14

B13

Positive terminal of the 13thbattery string

15

B14

Positive terminal of the 14thbattery string

16

B15

Positive terminal of the 15th battery string

17

B16

Positive terminal of the 16th battery string

P2

1

B17

Positive terminal of the 17th battery string

2

B18

Positive terminal of the 18th battery string

3

B19

Positive terminal of the 19th battery string

4

B20

Positive terminal of the 20thbattery string

5

B21

Positive terminal of the 21stbattery string

6

B22

Positive terminal of the 22ndbattery string

7

B23

Positive terminal of the 23rdbattery string

8

B+

Positive terminal of the battery pack

P3

Switch interface

1

Function when the switch is turned off: BMS operates normally with power supply

Functions when the switch is turned off:

1.All BMS power are disconnected.

2.Charging and discharging functions are disabled

2

P4

1

PACK-detection end

2

PACK-detection end

P5

CANCommunication Interface

1

CAN isolation 5V

2

CANH

3

CANL

4

CAN isolation ground

P6

RS232Communication Interface

1

NC

2

RS232_TXD

3

RS232_RXD

4

RS232 ground

P7

RS485Communication Interface

1

RS485 isolation 5V

2

RS485_B

3

RS485_A

4

RS485 isolated straight ground

P8

HEAT NTC

(It only works when the heating function is required)

1

Heated NTC detection end

2

Heated NTC ground terminal

P9

Temperature interface

1

Negative terminal of the 1st NTC

2

Positive terminal of the 1st NTC

3

Negative terminal of the 2ndNTC

4

Positive terminal of the 2ndNTC

5

Negative terminal of the 3rdNTC

6

Positive terminal of the 3rdNTC

7

Negative terminal of the 4thNTC

8

Positive terminal of the 4thNTC

P10

Display interface

1

LCD power supply positive terminal

2

LCD 3.3V positive terminal

3

LCD RXD

4

LCD TXD

5

LCD power supply negative terminal

6

LCD control power ON/ OFF

P11

Bluetooth interface

1

Bluetooth power positive

2

Bluetooth enable positive

3

Bluetooth RXD

4

Bluetooth TXD

5

Bluetooth power negative

6

Bluetooth reset

P12

DIP switch

(reserve)

1

DIP switch position 1

2

DIP switch position 2

3

DIP switch position 3

4

DIP switch position 4

5

DIP switch common ground

P13

12V driving voltage

1

Relay driver 12V negative terminal

2

Relay driver 12V positive terminal

B-

Connect to the overall negative terminal of the battery pack

PACK-

Connect to the negative terminal of external load or charger




Remark:Wiring method for downward compatible battery series: just shortthe positive terminal of the highest battery and the vacant high series together. If you want to connect to 16 strings, short B16, B17~B23, B+ wires together. If you want to connect 8 strings, short B8,B9~B23,B+ wires together. If you want to connect 4 strings, short B4,B5~B23,B+ wires together.

Example: Wiring battery 36V 10 strings, shortB24~B10 together, other strings refer to the table to short together.  


What are the key features that a ENJBMS should have?

Safety: ENJBMS have features to ensure the safe operation of the lithium battery, such as over-charge protection, over-discharge protection,over-temperature and short-circuit protection.

Accuracy: ENJBMS provide accurate voltage, current, and temperature readings to allow for proper battery monitoring and management.

Flexibility: ENJBMS support various types of lithium battery chemistries(like LiFePO4, LTO, NMC Li-ion,Sodium-ion batteries) and be adaptable to different battery configurations and sizes.

Reliability: ENJBMS have a robust design and be able to operate consistently and accurately over an extended period of time.

Communication: ENJBMS have a reliable communication interface, such as Bluetooth or RS232, WiFi, I2C, CAN, or RS485, to allow for easy integration with other system components and monitoring software.

Scalability: ENJBMS can scalable to accommodate future growth and changes in battery requirements. Support further software upgraded by bluetooth or ENJBMS PC software.

Cost-effectiveness: ENJBMS have a good balance between performance and cost, and be a cost-effective solution for the specific battery application.

These are the main characteristics that a top-performing Lithium Battery Management System should have.