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Type description: Polymer rechargeable battery pack for outdoor hazardous working places such as gas stations and gas filling stations.
No. | Item | Nominal parameter | Instruction |
1 | Nominal cApacity | 3700mAh | At temp 25±2℃，using 8.70V/0.2C charging/0.2C discharging |
Min capacity | 3700mAh | At temp 25±2℃，using 8.70V/0.2C charging/0.2C discharging | |
2 | Nominal Voltage | 7600mV | |
3 | Charging cut-off voltage | 8700mV±100 mV | Constant voltage charging |
4 | Discharging cut-off voltage | 6000mV | |
5 | Recommend charging current | 0.2C | Max charge current |
6 | Recommend discharging current | 0.2C | Max discharge current 3.7A |
7 | Charging cut-off current | ≤0.02C | Delay 1 minute to cut-off |
8 | Operation temp | Charging: 0~45℃ | Humi 45%~85% Below 18℃ using current <0.2C to discharge |
Discharging :-40~60℃ | |||
9 | Storage temp | Recommend：-10℃~45℃ | During storage, the battery must be charged to 50%-70% of its capacity every 3 months |
No. | Item | Standard | Test condition |
1 | Open-circuit voltage | 7.4V | At 25±2℃ working temp, drained completely, 0.5C fast charge to 2hrs and measurement |
2 | Cycle life | ≥80% after 300 cycle times | At 25±2℃ operation temp, 300 times charging and discharging cycle, Charging voltage/current: 8.7V/0.5C, cut-off current ≤0.01C Discharging current: 0.5C (cut-off voltage 6.0V) Cycle interval time: 10 minutes |
3 | Energy retention capacity | ≥ 80% | At 25±2℃ operation temp, placement 28 days then to calculate |
4 | Deep discharging | Equivalent to initial capacity | At 25±2℃ operation temp to charge and then using a 10Ω resistor to discharge 10 hours; using o.2C to charge until the voltage is 8.7V (cut-off current ≤0.02C） |
5 | Temp cycle | ≥ 80%, no damage | Undergo 5 times cycle testing and confirm standard discharging time, then check the appearance is good after standard charging. Cycle temp: humi less than 85%RH, 55℃ （2 hrs）—20℃ （4 hrs）- -10℃ （2hrs）*5 times |
