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Technical Specification
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Model No.
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ENJBMS2A8S50/ ENJBMS2A8S100/ENJBMS2A8S50P/ ENJBMS2A8S100P
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ENJBMS2A8S200/ ENJBMS2A8S300/ENJBMS2A8S200P/ ENJBMS2A8S300P
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Lithium iron string number
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4～8
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4～8
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Equalization mode
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Active equalization
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Equalizing current
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0~2A
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0~2A
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Continuous discharge current
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50A/100A
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200A/300A
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Maximum discharge current
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50A/100A
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200A/300A
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Overcurrent protection (adjustable)
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100A/200A
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300A/400A
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Outlet mode
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Common port
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Overcharge Protection Voltage(Adjustable)
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3.65V or 4.2V(Programmed to fit for LiFePO4/NMC Li-ion/LTO/Sodium-ion batteries)
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Overcharge release voltage(adjustable)
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3.50V(Programmed to fit for LiFePO4/NMC Li-ion/LTO/Sodium-ion batteries)
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Over-discharge protection voltage(adjustable)
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2.50V(Programmed to fit for LiFePO4/NMC Li-ion/LTO/Sodium-ion batteries)
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Over-discharge recovery voltage(adjustable)
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3.00V(Programmed to fit for LiFePO4/NMC Li-ion/LTO/Sodium-ion batteries)
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Temperature interface
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YES
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Short circuit protection
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YES
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Coulomb Meter Algorithm
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YES
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Display interface
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Optional
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RS485 communication interface
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Optional
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RS232 communication interface
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Optional
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CAN communication interface
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Optional
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Heating interface
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Optional
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Bluetooth interface
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Optional
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Charge current limit function
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Optional
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Maximum number of temperature detection
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Optional
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Connector
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Interface Name
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PIN NO.
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ENJBMS2A8S50/100/200/300 ENJBMS2A8S50P/100P/200P/300P
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Name
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Definition
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P1
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Equalization and Acquisition Interface
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1
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B0
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Negative terminal of the 1st battery string
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2
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B1
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Positive terminal of the 1st battery string
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3
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B2
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Positive terminal of the 2nd battery string
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4
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B3
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Positive terminal of the 3rd battery string
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5
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B4
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Positive terminal of the 4th battery string
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6
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B5
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Positive terminal of the 5th battery string
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7
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B6
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Positive terminal of the 6th battery string
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8
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B7
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Positive terminal of the 7th battery string
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9
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B8
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N/A
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10
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B9
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N/A
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11
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B10
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N/A
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12
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B11
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N/A
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13
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B12
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N/A
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14
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B13
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N/A
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15
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B14
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N/A
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16
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B15
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N/A
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17
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B16
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N/A
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P2
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1
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B17
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N/A
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2
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B18
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N/A
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3
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B19
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N/A
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4
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B20
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N/A
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5
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B21
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N/A
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6
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B22
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N/A
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7
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B23
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N/A
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8
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B+
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Positive terminal of the battery pack
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P3
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Switch interface
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1
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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
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2
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P4
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Display interface
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1
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LCD power supply positive terminal
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2
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LCD 3.3V positive terminal
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3
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LCD RXD
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4
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LCD TXD
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5
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LCD power supply negative terminal
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6
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LCD control power ON/ OFF
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P5
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Bluetooth interface
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1
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Bluetooth power positive
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2
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Bluetooth enable positive
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3
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Bluetooth RXD
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4
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Bluetooth TXD
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5
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Bluetooth power negative
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6
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Bluetooth reset
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P6
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DTC
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1
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Dry contact point 1
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2
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Dry contact point 1
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3
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Dry contact point 2
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4
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Dry contact point 2
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P7
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SOC LED
Note 1 Explanation
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1
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LED power supply +3.3V
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2
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LED1
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3
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LED2
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4
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LED3
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5
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LED4
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6
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LED5
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7
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LED Power Ground
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P8
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HEAT NTC
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1
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Heated NTC detector terminals
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2
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Heated NTC ground
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P9
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SOC Lamp Board
Switch Interface
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1
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The short press LED will indicate the actual capacity of the battery according to the SOC value, see note 1 for details.
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2
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P10
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RS485 communication interface
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1
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RS485 Isolated 5V
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2
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RS485_B
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3
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RS485_A
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4
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RS485 Isolated Straight Ground
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P11
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CAN communication interface
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1
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CAN Isolated 5V
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2
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CANH
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3
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CANL
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4
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CAN Isolated Ground
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P12
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RS232 communication interface
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1
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NC
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2
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RS232_TXD
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3
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RS232_RXD
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4
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RS232 Ground
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P13
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Heating Interface
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1
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Heater Negative
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2
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Heater Negative
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P14
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Temperature interface
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1
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1stNTC Negative
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2
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1stNTC Positive
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P15
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DIAL Switch
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1
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Dial switch function, please refer to Note 2 for details. Setting the address code of each battery for communication when multiple batteries are connected in parallel
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B+
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Connect to the overall positive terminal of the battery pack
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B-
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Connect to overall negative terminal of the battery pack
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P-
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Connect to external load negative terminal or charger negative terminal
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Remark:Wiring method for downward compatible battery series: just short the 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.