Test Preparation

3.Test condition:

Temperature.:23℃～26℃；Relative humidity:45﹪～75﹪；

4. Test instruments: capacitance testing cabinet, vibration test bench, multimeter (VC9807A+).

5. Test methods:

5.1 Charge the battery with 0.5C current at room temperature until the voltage reaches 4.2V, then the charging ends when the 4.2V constant voltage charging current drops to 0.02C; 5.2 Measure the open-circuit voltage of the battery after setting aside for 30min; 5.3 Fix the battery on the shaker table; from X, Y, Z three directions in each direction from 10Hz-55Hz cycle sweep vibration for 30 min, sweep rate of 1oct/min; 10Hz-30Hz, displacement amplitude (single amplitude): 0.38mm; 30Hz-55Hz, displacement amplitude (single amplitude): 0.19mm 5.4 Set aside for 30min after vibration, then test the open-circuit voltage of the battery and observe the appearance of the battery.

6. Determination criteria:

No damage to appearance, no leakage of liquid, no smoke, no explosion

Test Data Table

Test Result

Test Preparation

3. Test conditions: Temperature: 20℃～26℃; Relative humidity: 45﹪～85﹪.

4. Testing instruments: capacitance testing cabinet, heavy impact tester, internal resistance tester (BS-VR), multimeter (VC9807A+).

5. Test methods:

5.1 Charge with 0.5C current at room temperature until the voltage reaches 4.2V, then 4.2V constant voltage charging, and the charging ends when the current drops to 0.02C; 5.2 Set aside for 10min, test and record the voltage and internal resistance of the sample; 5.3 Using a 9.1±0.46kg weight, free fall from a height of 610±25mm, impact on a 15.8mm round bar placed on the battery; 5.4 At the end of the experiment, remove the battery and observe the appearance.

6. Determination criteria: No fire, no explosion.

Test Data Table

Test Result

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Test Preparation

3. Test conditions: Temperature: 20℃-26℃ Relative humidity: 60±15%RH

4. Test instruments: capacitance testing cabinet, drop test bench

5. Test methods. 5.1 Charge the sample with 0.5C at room temperature until the voltage reaches 4.2V, then charge at 4.2V with constant voltage, and end the charging when the current drops to 0.02C, and leave it for 10 minutes; 5.2 Set aside for 10 minutes, test and record the voltage and internal resistance of the sample; 5.3 Free fall the sample from 1m height to the concrete slab surface, from X, Y, Z positive and negative direction (six directions) each direction free fall once, set aside for 30min, test and record the voltage and internal resistance of the sample; 5.4 Observe the appearance of the battery.

6. Determination criteria: the battery does not leak, do not smoke, do not explode.

Test Data Table

Test Result

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Test Preparation

3. Test conditions: Temperature: 130±2°C

4. Testing instruments: capacitance testing cabinet, high and low temperature alternating transformation test box

5. Test methods:

5.1 Charge at 0.5C at room temperature until the voltage reaches 4.2V, then 4.2V constant voltage charging, charging ends when the current drops to 0.02C, set aside for 10 minutes;;

5.2 The test records the internal resistance, voltage and thickness of the sample;

5.3 Place the sample in the autoclave; adjust the autoclave temperature from room temperature to 130°C at a rate of (5°C ± 2°C)/minute, and maintain a constant temperature for 30 min after the autoclave temperature reaches 130°C;

5.4 Remove the sample to observe the appearance of the sample, and immediately test and record the thickness of the sample, set aside at room temperature for 2h after the measurement of internal resistance, voltage;

6. Judgement criteria: the battery does not fire, do not explode

Test Data Table

Test Result

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Test Preparation

3. Test conditions:

Temperature: 20℃～26℃; Relative humidity: 60±15%RH.

4. Test instruments:

Component testing cabinet, extrusion test bench, multimeter (VC9807A+), digital calipers.

5. Test methods:

5.1 Charge with 0.5C current at room temperature until the voltage reaches 4.2V, then 4.2V constant voltage charging, and the charging ends when the current drops to 0.02C; 5.2 Set aside for 10min, test and record the voltage and thickness of the sample; 5.3 Place the battery in two planes, perpendicular to the direction of the plate for extrusion, between the two plates to apply 13.0kN ± 0.78kN, extrusion pressure once the maximum value can stop the extrusion test, the test process can not occur during the external short circuit; 5.4 Remove the sample to observe the appearance of the sample, and immediately test and record the thickness of the sample, set aside at room temperature for 2h after measuring the voltage;

6. Determination criteria: the battery does not catch fire and does not explode.

Test Data Table

Test Result

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Test Preparation

3. Test conditions:

Temperature: 20℃～26℃; Relative humidity: 45﹪～75﹪.

4. Test instruments:

Capacitance testing cabinet, safety test chamber, internal resistance tester (BS-VR), multimeter (VC9807A+).

5. Test methods:

5.1 Charge at room temperature with 0.5C current at constant current until the voltage reaches 4.2V, then 4.2V at constant voltage, and the charging ends when the current drops to 0.02C; 5.2 After setting aside for 10min, test the internal resistance, voltage and thickness of the sample; 5.3 Put the battery into the safety test box, and then short-circuit the positive and negative terminals with a wire with an external resistance of 80mΩ±20mΩ; 5.4 When the surface temperature of the battery drops to about 10℃ lower than the peak value, or the battery explosion and fire and other phenomena to end the test; 5.5 Remove the sample, set aside for 30min, observe the appearance of the sample, test its voltage, internal resistance.

6. Determination criteria: no fire, no explosion.

Test Data Table

Test Result

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Test Preparation

3. Test conditions:

Temperature: 20℃～26℃; Relative humidity: 45﹪～75﹪.

4. Test instruments:

Safety test chamber, internal resistance tester (BS-VR), multimeter (VC9807A+)

5. Test methods:

5.1 Discharge the sample at 0.2C at room temperature until the voltage reaches 2.75V; 5.2 After setting aside for 10 min, test the voltage and internal resistance of the sample; 5.3 Put the sample into the safety test box; turn on the constant current and constant voltage source and adjust its voltage to 4.6 V and current to 3C; 5.4 will be connected to the sample constant current and constant voltage source corresponding to the positive and negative poles, when the charging current drops to close to 0 A, the voltage is charged to 4.6 V and maintain the highest voltage continues to charge for 7 hours, or explosion fire and other phenomena such as the end of the phenomenon; 5.5 Remove the sample, set aside at room temperature for 30min, observe the appearance of the sample.

6. Determination criteria: Battery bulging, no fire, no explosion.

Test Data Table

Test Result

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Test Preparation

3. Test conditions:

Temperature: 20℃～26℃; Relative humidity: 45﹪～75﹪.

4. Test instruments:

Needlepoint test bench, multimeter (VC9807A+)

5. Test methods:

5.1 Charge with 0.5C current at room temperature until the voltage reaches 4.2V, then 4.2V constant voltage charging, charging ends when the current drops to 0.01C; 5.2 Set aside for 10min, test and record the sample voltage; 5.3 Fix the sample on the fixture of the needling test bench; 5.4 The diameter of φ3mm non-corrosive rust steel needle with a speed of 10mm/s~40mm/s to pierce the centre of gravity of the largest surface of the battery pack, and keep it for 1Min, such as the battery explosion or fire is the end of the test; 5.5 Set aside for 2h, take out the sample to observe the appearance of the battery, test and record the sample voltage.

6. Determination criteria: no fire, no explosion, no smoke.

Test Data Table

Test Result

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Test Preparation

3. Test conditions:

Temperature: 75±2°C

3. Test instruments:

Testing cabinet, constant temperature and humidity box, multimeter (VC9807A+), internal resistance tester (BS-VR), digital calipers

5. Test methods:

5.1 Charge with 0.2C current at room temperature until the voltage reaches 4.2V, then 4.2V constant voltage charging, the charging ends when the current drops to 0.02C; 5.2 Set aside for 5min, discharge with 0.2C current to 2.75V, record the discharge capacity of the sample; 5.3 Set aside for 5min, charge to 4.2V with 0.2C current, then charge with 4.2V constant voltage, charging ends when the current drops to 0.02C, set aside for 10min, test the voltage, internal resistance and thickness of the battery; 5.4 In the ambient temperature of 75 ± 2 ℃, open-circuit storage 8H, before the beginning of the storage process to test the battery voltage, internal resistance, thickness, and 5.5. Take out the battery cell after 8H storage and record the voltage, internal resistance and thickness of the sample; 5.6, set aside 2H, discharge to 2.75V with 0.2C current at room temperature, record the holding capacity of the sample, and then repeat 5.1-5.2 charging and discharging steps for 5 times to test the recovery capacity of the battery cell.

6. Determination criteria: Battery does not leak, smoke, fire or explode; no expansion and deformation of the battery pack, capacity retention rate ≥90%, capacity recovery rate ≥95%, internal resistance change rate ≤10%, thickness change rate ≤2%.

Test Data Table

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