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The application scenarios of rechargeable explosion-proof lithium-ion batteries: underground places with explosion, fire and dust in coal mines.
No. | Item | Nominal parameter | Instruction |
1 | Nominal capacity | 1800mAh | At operation temp 25±2℃, using 0.2C charging and 0.2C discharging |
2 | Nominal Voltage | 3700mV | Fast charging in 1 hour |
3 | Charging cut-off voltage | 4200mV±50 mV | Constant voltage charging |
4 | Discharging cut-off voltage | 3000mV | Stop discharging when the voltage of single cell below 3.0 V |
5 | Recommend charging current | 360mA (0.2C) | Max charging current 360mA(0.2C) |
6 | Max continuous discharge current | 900mA(0.5C) | Recommend continuous discharging power less than 1W |
1800mAh(1.0C) | Recommend continuous discharging time less than 10 minutes | ||
7 | Charging cut-off current | ≤0.02C | 1 minute |
8 | Operation temp | Charge 0~45℃ | Humi 45%~85% |
Discharge 0~60℃ | |||
9 | Storage temp | Recommend：-5℃~30℃ | During storage, the battery must undergo a charge-discharge cycle every three months and be charged to 50%-70% of its capacity |
No. | Item | Standard | Test condition |
1 | Weight | Less than 80g | |
2 | Internal resistance | Less than 200 mΩ | |
3 | Open-circuit voltage | About 3.7V | At 25±2℃ working temp, drained completely, 0.5C fast charge to 1hrs and measurement |
4 | Cycle life | ≥75% after 500 cycle times | At 25±2℃ operation temp, 500 times charging and discharging cycle Charging voltage/current: 4.2V/0.2C, cut-off current ≤36mA Discharging current: 0.2C (cut-off voltage 3.0V) Cycle interval time: 20minutes |
5 | Energy retention capacity | ≥80% | At 25±2℃ operation temp, placement 28 days then to calculate |
6 | Deep discharge | =initial capacity | After standard charging, at 25±2℃ operation temp With a 10-ohm resistor for 24 hours to discharge ,then use 0.1C charge to 4.2V, cut-off current≤36mA |
7 | Thermal shock | ≥80% good appearance | 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 |
