|
NO.
|
Testing
|
Testing Description
|
Testing Requirement
|
|
1
|
Vibration test
|
Put a 100% charged battery on a vibration platform at room temperature and shake for 30 minutes according to the following parameters:
Amplitude: 1.6 (p-p) Frequency: 10-55Hz Direction: X, Y, Z
|
No cracking, no fire, no leakage
|
|
2
|
Short Circuit
|
After the battery is fully charged, a short-circuit current of 500A is passed to the battery for 60 seconds.
|
No explosion, no fire
|
|
3
|
Heavy object impact
|
After the battery is fully charged, place it on an impact table and drop it freely from a height of 0.61m with a 10kg weight hammer.
|
No explosion, no fire
|
|
4
|
Overcharge
|
The battery is discharged to 1.0V with a constant current of 1C at normal temperature, and then charged to 10V with a current of 3C, and ends when the current approaches 0mA.
|
No explosion, no fire
|
|
5
|
Squeeze
|
After the battery is fully charged, sandwich it between two metal plates and apply a force of 13KGF for 60 seconds.
|
No explosion, no fire
|
|
6
|
High and low temperature
|
Constant current and constant voltage 1C and 4.2V charge cut-off current 0.02C at room temperature, respectively at -20 ℃ \ -10 ℃ \ 0 ℃ \ 25 ℃ \ 60 ℃ (12 hours at low temperature, 2h at high temperature), 0.5C Discharge to 1.0V; test the discharge capacity of the battery.
|
Discharge capacity ≥ initial capacity * 70%
|
|
7
|
Charge retention
Storage performance
|
Measure the initial capacity of the battery using standard charge and discharge conditions, and then store the battery in a standard environment of 25 ± 5 ° C for 28 days after standard charging. Discharge at 1C to the end-of-discharge voltage to test the remaining capacity of the battery. Then test the battery's recoverable capacity according to standard charge and discharge conditions.
|
Remaining capacity ≥ initial capacity * 85%
Recovery capacity ≥ initial capacity * 95%
|
|
8
|
Cell cycle test
|
Standard charge and discharge, cyclic test, until the discharge capacity is less than 70% of the initial capacity for two consecutive times, that is, the cycle life is considered to end
|
800 times
|
|
9
|
Thermal shock
|
The fully charged battery is heated in a strong convection oven. The temperature of the oven is increased from room temperature to 130 ± 2 ° C at a rate of 5 ± 2 ° C / min, and the temperature is kept constant at this temperature for 10min.
|
No explosion, no fire
|
|
10
|
Drop
|
Drop a 100% charged battery from a height of 1.0m to a hardwood board of 18-20mm thickness placed on a concrete floor, and drop freely once in each direction
|
No cracking, no fire, no leakage
|
|
11
|
Plug test
|
Insertion force ≥1kg Extraction force ≤3.5kg Insertion speed 12.7mm / min
|
≥1000 times
|
|
12
|
Insulation withstand voltage test
|
Apply a high voltage of 1200V / min to the product, and the leakage current is 0.5mA
|
No breakdown
|
