Chargery BMS8T is designed special for LiPo & LiFe&LiTo battery pack applied to storage energy system and Electrical Vehicle including E-Motorcycle, E-Scooter and so on. The unit can measure or detect the battery voltage, cell voltage, charge & discharge current, battery temperature, and battery SOC (State of Charge) , displayed with TFT color LCD.

Special Features:

1. The BMS8T uses advanced ADC measurement technology, high accuracy, high voltage and high current detection circuit. The maximum voltage measurements tolerance is within 8mV at up to 8S LiPo battery (33.6V)
2. Charge/discharge current up to 600A.
3. Support regenerative braking, during braking operation can charge the batter pack and the discharge power (Wh) will decrease to response to the braking power.
4. 1.2A per cell balance current is very useful for large capacity battery pack, the feature can resume all cell
   voltage balance status at the shortest time. over temperature protection make sure the system safety
   during balance.
5. BMS8T calculate and display the charge and discharge power (Wh), generally the battery rated power is rated voltage multiply rated battery capacity.
6. TFT LCD screen that provides rich information including current, voltage, power, capacity, control status, SOC and temperature and so on.
7. BMS8T features a maximal safety protection, within the range parameters can be setup, BMS8T will alarm and cutoff charge or discharge according to users’ setup, out of range of parameters, and trigged absolute maximum ratings BMS8T will force to cutoff charge or discharge to prevent the battery from fire.
8. Minimize the power consumption by draw current from all cells or external power supply.
9. Dual power design, the unit can be powered by all cells or external power supply.
10. Detect cell count at any time, and compare with the count detected when switch on first time. If it is not uniformity, the device will alarm and cutoff charge or discharge according to users’ setup, the feature can prevent any cell connection from loosing.
11. Sound alarm and LED alarm will be triggered when any warning events happened, and then wait several seconds cut off or NOT charge or discharge. The delay time can be programmed.
12. Charge relay and discharge relay are controlled independently.
13. Two temperature sensors monitor battery temperature on different location.
14. Supports upgrading the firmware program by USB port.
15. BMS8T provide users the maximal flexibility, key parameters can be programmed.
16. BMS8T display battery SOC or called battery gauge similar with car dashboard. Cell count, battery pack voltage and battery gauge (%) is displayed simultaneously.
17. In case that the battery pack need not be charged and discharged, Press STOP button enter into sleep mode to save energy consumption. Charge and Discharge is cut off, LCD back light is off. Press any key to resume normal work mode.
18. LCD back light ON time can be programmed to save energy, when it is OFF, press any key to resume “ON”.
19. add communication wiht external device by RS232, all date will be sent out.

Protection Functions:

1. Cell count error protection
2. Over charge protection
3. Under voltage protection
4. Over current protection when charge or discharge
5. Over temperature protection
6. Low temperature protection
7. Over differential cell voltage
8. Over differential battery temperature
9. under SOC protection

BMS8T manual V4.2(3305K )

Connection diagram on same charge and discharge port for BMS8T

1. Battery range: 2S-8S LiPo & LiFe battery pack
2. Accurate scope of the cell voltage: -5mV/+5mV
3. Cell Voltage display range: 0.10~4.99V
4. The voltage of external power：15-60V
5. Balance current: 1.2A per cell
6. Temperature display range:0.0℃~150℃,
7. Display 0.0 when under 0.0℃
8. SOC indicator:
   • RED area @ 0~15% of SOC
   • YELLOW area @ 16~35% of SOC
   • GREEN area @ 36~100% of SOC
9. Size: 122*80*28 mm
10. Weight: 300g without current shunt
11. Warning LED: 11000mCd, @ 2.0V, 20mA
12. Warning beeper: 85dB @ 12V, 25mA
13. Package: AL alloy case

Over 600A cusrrent customized is available.

The relay driven delay time board is optional, to restrain surge current when battery discharge to motor, the board can close a small current relay first and then close a large curren relay after a programmabl delay time.

if work with DCC, don't need install the board.

The 100V DC contactor is optional. the power consumption is only 11mA

On BMS16 V2.0,BMS8T v3.0 and BMS16T v3.0, the relay controller output 12V 3A to drive the relay whatever the battery type and cell count. The relay rated current should be chose according to the maximal discharge or charge current. Generally, the rated current must be larger 20% than actual current.

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