Shenzhen BAK Technology Co., Ltd.
Shenzhen BAK Technology Co., Ltd.
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Smart PCB circuit board Printed Circuit Board/PCBA assembly BMS 3S4P for li ion battery pack
2.1 Basic protection item for PCM
| NO | Items |
Protection condition | Delay time | Release condition | ||
| 1 | Cell Over charge voltage Cell | 1st level safty | 4.250V±0.025V | 2.0s±0.5s | 4.08±0.050V | |
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| 2nd level safty | 4.35V±0.050V | 2.0s±0.5s | permanent fail | |
| 2 | Cell Under discharge voltage | 1st level safty | 2.750V±0.025V | 2.0s±0.5s | 3.000±0.050V | |
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| SUV Threshold | 2.000V±0.025V | 5.0s±0.5s | permanent fail | |
| 3 | Over current | OCC1 Threshold | 8A±0.2A | 3.0s±0.5s | -50mA/5s | |
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| OCC2 Threshold | 10A±0.2A | 2.0s±0.5s | -50mA/5s | |
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| OCD1 Threshold | 8A±0.2A | 3.0s±0.5s | 0mA/10s | |
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| OCD2 Threshold | 10A±0.2A | 2.0s±0.5s | 0mA/10s | |
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| AOLD Threshold | 30.0A±3.0A | 10ms-30ms | 0mA/5s | |
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| ASCC Threshold | 54.00A±5.0A | 350uS-600us | 0mA/5s | |
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| ASCD1 Threshold | 54.0A±5.0A | 800uS-1000us | 0mA/5s | |
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| ASCD2 Threshold | 66A±5.0A | 300uS-600us | 0mA/5s | |
| 4 | Over temperature | OTC Threshold | 65±3℃ | 2.0s±0.5s | 60±3℃ | |
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| OTD Threshold | 70±3℃ | 2.0s±0.5s | 60±3℃ | |
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| OTF Threshold | 90±3℃ | 2.0s±0.5s | 80±3℃ | |
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| UTC Threshold | -3±3℃ | 2.0s±0.5s | -0±3℃ | |
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| UTD Threshold | -25±3℃ | 2.0s±0.5s | -20±3℃ | |
| 5 | Charge Balanced
| Cell Balance Threshold | 3.600±0.050V | |||
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| Balanced Cell Balance Window
| 100mV | |||
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| Cell Balance Min | 40mV | |||
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| Cell Balance Interval | 20s | |||
| 6 |
continuous current | Charge current
| 5.0A | |||
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| discharging current
| 5.0A | |||
| 7 | (L*W*H)Size | 82*17*2.5mm±0.5mm | ||||