|
NO.
|
Item
|
Criterion
|
Test Method
|
|
1
|
0.5C discharging
capacity
|
Discharging capacity is not
less than normal capacity.
|
After Standard Charging, rest 5 minutes ,then
0.5C discharge to ending voltage.
|
|
2
|
Room
temperature 1C
discharging
capacity（initial
capacity）
|
Discharging capacity must be
not less than nominal
capacity and no more than
110% nominal capacity. Range：≤5% the average of initial capacity
|
After the cell is charged with 1C，and then discharge it to 2.5V with 1C.Repeat 5 times（If the range of capacity is no more than 3% nominal capacity and sustains 3 times，stop the test early）,average the last three. 1C
|
|
3
|
Standard cycle life
|
Discharging capacity is not
less than 80% initial capacity
when have cycled 2000 times
|
Test condition: 25±2℃ Charge：1C to 3.65V, then constant voltage 3.65V charge till charged current declines to ≤ 0D.i0s5cCharge：1C to 2.5V When the discharge capacity reduced to 80% of rated capacity, Stop testing
|
|
4
|
Ratio discharging capacity
|
Discharging capacity should
be not less than 90% initial
capacity
|
After the cell is charged with 1C，and then discharge it to 2.5V with 3C.Compare with the initial capacity.
|
|
5
|
Ratio charging
performance
|
Discharging capacity should
be not less than 80% initial
capacity
|
After the cell is charged with 2C，and then discharge it to 2.5V with 1C。Compare with the initial capacity.
|
|
6
|
Low
temperature
discharging
capacity
|
Discharging capacity should
be not less than 70% initial
capacity
|
After the cell is charged with 1C，keep the cell at -20℃±2℃ for 24 hours，and then discharge it to 2.0V with 1C at -20℃±2℃。Compare with the initial capacity.
|
|
7
|
High
temperature
discharging
capacity
|
Discharging capacity should
be not less than 90% initial
capacity
|
After the cell is charged with 1C，keep the cell at 55℃±2℃ for 5 hours，and then discharge it to 2.5V with 1C at 55℃±2℃。Compare with the initial capacity.
|
|
8
|
Charge retention
capacity and
recovering
capacity of room
temperature
|
Charge retention capacity should be not less than 85% initial capacity ； recovering capacity should be not less than 90% initial capacity
|
After the cell is charged with 1C，keep the cell at room temperature for 28days ， and then discharge it to 2.5V with 1C at room temperature. Metering the charge retention capacity；Then the battery should be charged with 1C and should be discharged with 1C at room temperature. Metering the recovering capacity.
|
|
9
|
Charge retention
capacity and
recovering
capacity of high
temperature
|
Charge retention capacity should be not less than 85% initial capacity ； recovering capacity should be not less than 90% initial capacity
|
After the cell is charged with 1C，keep the cell at 55℃±2℃ for 7daysand rest 5h at room temperature，discharge it to 2.5V with 1C at room temperature. Metering the charge retention capacity ； Then the cell should be charged with 1C and should be discharged to 2.5V with 1C at room temperature. Metering the recovering capacity.
|
|
10
|
Appearance
|
The surface of cell should be
dry and labeled clearly，and
without burr ， scratch ，
contamination，distortion，
break and so on
|
Visual inspection
|
|
11
|
Polarity
|
The cell polarity should be
labeled clearly and correctly
|
Measured with voltmeter
|
|
12
|
Dimension and
Weight
|
The cell dimension and weight accord with stated value
|
Using measuring tools and electronic scale
|
|
13
|
Storage
|
Discharging capacity should
be not less than 90% initial
capacity
|
After the cell is charged with 1C，and then discharge it with 1C in 30min at room temperature. Keep the cell at 45℃±2℃for 28days and rest 5h at room temperature. Then the cell should be charged with 1C and should be discharged to 2.5V with 1C at room temperature. Metering the discharging capacity.
|
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