25.6v&51.2V LiFePO4

1

Charge Method 充电制式

Standard Charge Method: The charging the Battery at a constant current of 0.5C5A until the limit voltage , then charged at a constant voltage until its current is less than cut-off current 0.02C，the charging time less than 5h.

标准充电：在环境温度为25℃±5℃的条件下,先以恒定电

流0.5C5A.充电至限制电压,再恒压充电至电流小于截止电流0.02C.最长充电时间不大于5小时。

2

0.5C

Discharge Capacity 0.5C 放电容量

A battery is charged in accordance with 5.1, and then stored in an ambient temperature of 20℃±5℃ for 0.5h～1h, finally discharged to cut-off voltage at a constant current of 0.5C5A

电池按5.1规定充电后在环境温度为20℃±5℃的条件下搁置0.5h～1h,而后以0.5C5A电流放电到终止电压

Discharge time is not less than 2h 放电时间≥2h

3

1C

Discharge Capacity

1C 放电容量

The battery is charged in accordance with 5.1, and then stored in an ambient temperature of 20℃±5℃ for 0.5h～1h,finally discharged to cut-off voltage at a constant current of 1C5A

电池按5.1规定充电后在环境温度20℃±5℃的条件下搁置0.5h～1h,而后以1C5A电流放电到终止电压

Discharge time is not less than 54min

放电时间≥54min

`4

Cycle Life

循环寿命

With 1C5A constant-current charging to Limit voltage, then constant voltage charging to the cut-off current or less, let stand for 30 min, use electricity to the cut-off Voltage,0.5C5A constant exile let stand for 30 min.

Repeat the above steps, record the battery charge and discharge capacity

用1C5A恒流充电至限制电压，恒压充电至截止电流

≤0.02C5A，静置30min后，用1C5A恒流放电至终止电压，静置5min。重复上述步骤，记录电池充放电容量

≥2000 cycles. Retention capacity≥70% of the initial.

循环寿命不少于

2000次,剩余容量

≥80% 初始容量

5

Storage Characteristi cs

储存性能

Capacity after 30days storage at 25℃±5℃ from standard charge.

标准充电方式充电后，25℃±5℃下储存30天后的容量

Retention Capacity ≥90% 剩余容量≥90%