充放电性能 no. items test method and condition criteria 1 standard charging 标准充电 charging the cell initially with constant current at 0.2c and then with constant voltage at 4.2v till charge current declines to 0.05c 先用0.2c恒流充电至4.2v，再恒压4.2v充电直至充电电流≤0.05c 2 initial capacity 初始容量 the capacity means the discharge capacity of the cell, which is measured with discharge current of 0.2c with 2.5v cut-off voltage after standard charge. 该容量是指标准充电后，0.2c放电至2.5v截止电压所放出的容量。 ≥ 2.2ah 3 discharging at high temperature 高温放电 1) standard charge标准充电 2) put the cell into 60±2℃ high temp oven for 2 hours and discharge at 0.2c cc to 2.5v at the high temperature. 在60±2℃的高温箱中恒温2h，在该温度下0.2c恒流放电至2.5v。 discharging capacity初始容量90% 4 discharging at low temperature 低温放电 1) standard charge标准充电 2) put the cell into -40±2℃ high temp oven for 4 hours and discharge at2.5a for 5 min and then change to1a to 2.5v at this temperature. 在-40±2℃的高温箱中恒温4h，在该温度下恒流440ma放电35分钟，然后改用220ma恒流放电至2.5v。 discharging capacity 初始容量85% 5 cycle life 循环寿命 a battery unit shall be repeated 100 charge/discharge cycles, charged at cc-cv 0.2cma to 4.20v , laying the battery 5min, discharged at 0.2cma to3.0v end voltage, after 500 cycles, recording the discharging capacity 电池用0.2cma恒流恒压充饱电至4.2v,搁置5min,用0.2cma电流放电到3.0v,记录放电容量,循环500次. nominal capacity 标称容量 cycle life循环寿命≥500 times次 6 self-discharge 自放电 after the standard charging, storied the cells under the condition as no.6.4 for 28 days, then measured the capacity with 0.5c till 2.5v 标准充电后，在no.6.4条件下贮存28天，再以0.5c放电至2.5v所放出的容量。 residual capacity：>90% 余容量： >90% 7 initial impedance of cell 电芯初始内阻 internal resistance measured at ac 1khz after semi-charging 半充状态下，测量其ac 1khz下的交流阻抗 ≤ 30m 8 cell voltage 电芯电压 state of shipment 出货状态 3.8v~4.1v 9 temperature characteristics 温度特性 1. according to item 5.5, at 20±5℃. 2. capacity comparison at each temperature, measured with constant discharge current 1c with 2.5 v cut-off. percentage as an index of the capacity compared with at 20℃ 1.在20±5℃条件下，用5.5方法将电池充电。 2.在不同温度条件下，用0.5c的电流恒流放电至截止电压2.5v。以20℃时放电容量为基准计算百分比。 -20℃: ≥60% 20℃: 50℃: ≥85% 10 storage characteristics 储存特性 1. according to item 5.5, at 20±5℃. 2. the battery shall be stored at 50±5℃ for 7days and rested at room temperature for 1 hour then measured with constant discharge current 1c with 3.0v cut-off. 1. 在20±5℃条件下，用5.5方法将电池充电。 2.将电池在50±5℃条件下贮存7天，然后在常温下静置1小时，用0.5c的电流恒流放电至3.0v截止电压。 retained capacity ≥85% 湖南合一能源科技有限公司，低温电池、低温锂电池、温锂电池、低温18650锂电池、18650动力电池组、铁锂电池组、矿用锂离子电池、低温高倍率电池、储能锂电池组生产制造专家，更多产品信息详见合一电池工厂网站。 （以上价格仅供参考，具体价格以实际详谈为准。）