Battery management system, abbreviated BMS, is a protection circuit module, which is designed to protect LiFePO4 battery cells or packs from over-discharge, over charge, over current, over temperature, short circuit etc. Also it has the function of charging balancing.
Since BMS is an indispensible protection circuit for LiFePO4 battery pack, we develop our own BMS successfully. Up to now, our BMS can control 48 cells (i.e, series) and manage 120amps to 150Amps constant discharge current. They work well and are winning praise from our customers at home and overseas.
Basic parameters of Ronda's BMS (take 20S):
S/N | Test Items | Criterion | ||
1 | Voltage | Charge Voltage | DC:72V | |
Single Cell Balancing Voltage | 3.60±0.025V | |||
2 | Current | Single Cell Balancing Current | 72±5mA | |
Current Drain (Self)- Single Cell | ≤20μA | |||
Maximum Continuous Charge Current | 5A | |||
Max Continuous Discharge Current | 50A | |||
3 | Over-charge Protection (Single Cell) | Over-charge Detection Voltage | 3.90±0.025V | |
Delay time for Over-charge Detection | 0.5S—2S | |||
Over-charge restore voltage | 3.80±0.05V | |||
4 | Over-discharge Protetion (Single Cell) | Over-discharge Detection Voltage | 2.0±0.05V | |
Delay Time for Over-Disc Detection | 10mS—300mS | |||
Over-disc Restore Voltage | 2.3±0.05V | |||
5 | Over-current Protection | Over-current Detection Voltage | 0.62V | |
Over-current Detection Current | 150±20A | |||
Delay time for Over-current Detection | 5ms—20ms | |||
Restore status | Disconnect,auto restore | |||
6 | Short-circuit Protection | Detection Status | exteral short circuit | |
Detection Delay Time | 200-500us | |||
Restore status | Disconnect,auto restore | |||
7 | Internal Impedance | Protection Circuit(MOSFET) | ≤20mΩ |