864468低温储能型锂电池基本性能测试

Item项目

Test Condition检测条件

Requirement要求

Appearance外观

Visual Inspection目测

Surface and mark clear, no leakage, no scratch and no damage and no deformation表面清洁，标识清楚，无电解液泄漏，无明显划痕及机械损伤，无变形。

Voltage when out factory出厂电压

Tested before shipment出货时检验

≥3.8V

Standard Charging     标准充电

1) Charge at CC 0.2C, cut off voltage 4.2V 恒流0.2C充电，截止电压4.2V

2) Charge at CV 4.2 voltage, cut off current≤0.05C

恒压4.2V充电，截止电流≤0.05C

It is way of charging of arbitration

此方式为仲裁充电方法

Nominal Capacity

标称容量

1) Standard Charge标准充电

2) Discharge at 0.2C CC to 3.0V

以0.2C恒流放电至3.0V。

Discharge capacity≥2300mAh

放电容量≥2300mAh

Discharge at High Temperature

高温放电

1) Standard Charge标准充电

2) Put the cell into 55±2℃ high temp oven for 2 hours and discharge at 0.2C CC to 3.0V at the high temperature. 在55±2℃的高温箱中恒温2h，在该温度下0.2C恒流放电至3.0V。

Discharge capacity≥2185mAh

放电容量≥2185mAh

Discharge 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 at 0.5C CC to 2.5V at the high temperature.

在-40±2℃的高温箱中恒温4h，在该温度下0.5C恒流放电至2.5V。

Discharge capacity≥1840mAh

放电容量≥1840mAh

Capability of Keeping Electricity

荷电保持

和恢复能力

1) Standard charge: the cell shall be disconnected and put aside for 28 days, discharge at CC 0.2C to 3.0V.

标准充电；在20±5℃下开路搁置28天，以0.2C恒流放电至3.0V。

2）Then standard charge: discharge at 0.2C CC to 3.0V. 紧接着标准充电；以0.2C恒流放电至3.0V。

Discharge capacity ≥1955mAh

放电容量≥1955mAh

Cycle Life循环寿命

Put aside for 5min at 20±5℃ after fast charge, discharge at 1C to 3.0V and rest 5min. Repeat above steps. Check capacity per cycle 25 times, and then discharge at 0.2C CC to 3.0V till discharge capacity less than 80% nominal capacity, test end.

在20±5℃下，快速充电后，搁置5min，以1C放电至3.0V，搁置5min，重复上述步骤进行循环。每25个循环作一次容量检查，即用0.2C的恒流放电至3.0V，直至放电容量小于80%标称容量，结束测试。

Nominal capacity标称容量2300mAh

Cycle life循环寿命≥400 times次