Electric wrench li-ion battery pack (18V 5S2P)
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Electric wrench li-ion battery pack (18V 5S2P)
Production specifications
| Item 项目 | Description 内容 | Remark 备注 |
| Rated capacity 额定容量 | 3000mAh | 0.2ItA discharging 放电 |
| Rated capacity 额定电压 | 18V | |
| Charging method 充电方式 | CC/CV 恒流/恒压 | |
| Changing voltage 充电电压 | 21V | |
| MAX charging current 最大充电电流 | 2A | |
| Continuous discharging current 连续放电电流 | 15A | |
| IR difference of grouping 配组内阻差 | ≤2mΩ | |
| Operating working temperature 工作环境温度 | Charing 充电：0℃～40℃； Discharging 放电：-10℃～60℃ | |
| Outgoing voltage 出厂电压 | ≥18V | |
| Outgoging SOC 出厂时电池包荷电量 | 30% | |
| Battery pack IR 电池包的内阻值 | ≤120mΩ |
Electrical performance
| Item 项目 | Test method 测试方法 | Criteria 判定标准 |
| Standard charge 标准充电 | Charge at CC mode at 520mA until the pack voltage reaches 21V, change to CV charge mode, when the charging current is no higher than 75mA, stop charging. 以520mA恒流充电，当电压达到21V后，转为恒压充电，充电电流小于或等于75mA时，充电结束。 | |
| Rapid charging 快速充电 | Charge at CC mode at 1300mA until the pack voltage reaches 21V, change to CV charge mode, when the charging current is no higher than 75mA, stop charging. 以2000mA恒流充电，当电压达到21.4V后，转为恒压充电，充电电流小于或等于75mA时，充电结束。 | |
| Capacity 容量 | Rest the battery for 1 hour after being fully charged by standard charging mode. Keep discharging the battery at current of 520mA until protection is triggered off. 标准充电后搁置1小时，以520mA电流连续放电至电池组放电保护。 | Discharging time≥5hrs 放电时间≥5小时 |
| Capacity measured at 5C discharge 5C放电容量 | Rest the battery for 1 hour after being fully charged by standard charging mode. Keep discharging the battery at current of 15A until protection is triggered off. 快速充电后搁置1小时，以15A放电至电池组放电保护。 | Discharging time ≥ 10.8mins 放电时间≥10.8mins |
| Cycle life 循环寿命 | Leave the battery for 10 mins after being fully charged. Keep discharging the battery at current of 15A until the cut-off is triggered. Leave the battery for 45 mins before the next charging/discharging cycle, until the battery discharging capacity are below 80% of the nominal capacity. The test is over. 快速充电后搁置10min，以15A电流恒流放电至电池组受保护板过放保护无输出，搁置45min，再进行下一个充放电循环，直至连续两次放电容量低于额定容量的80%，试验结束。 | No less than 200 cycles 循环次数不低于200次 |
| Battery balance 电池均衡 | Discharege one cell of battery pack at 20% capacity after standard charging the whole battery pack,then re-charging this single cell for 10 hrs by twice. 电池组标准充电后对电池组内某节单体电池放电20%容量，再进行两次10小时的充电。 | Battery pack actual capacity is not lower than the rated capacity after testing. 试验后电池组的实际容量不低于额定容量 |
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