Complaint
| No. | Item | General parameter | Remark |
| 1 | Can Material | Ni-plate Steel | |
| 2 | Nominal capacity | 2000mAh | Charge:0.5C5A,4.2V, CC CV 0.01 C5A Cut-off, Discharge:0.2C5A ,2.75V discharge cut-off |
| 3 | Minimum capacity | 1980mAh | |
| 4 | Nominal voltage | 3.7V | |
| 5 | Maximum charge voltage | 4.20±0.025 V | |
| 6 | Discharge cut-off voltage | 2.75±0.05V | |
| 7 | Maximum continuous charge current | 2A(1C5A) | |
| 8 | Maximum continuous discharge current | 20A(10C5A) | |
| 9 | Maximum pulse discharge current | 30A | 20ms |
| 10 | Internal impedance | ≤18mΩ | Measured at AC1KHz of 50%DOD |
| 11 | Battery weight | Approx.44g | |
| 12 | Battery diameter (d) | 18.4±0.2mm | |
| 13 | Battery height (h) | 65.3±0.2 mm | |
| 14 | Charge method | CC-CV(Cut-off Current 0.01 C5A) | CC/CV |
| 15 | Standard charge | Standard charge:0.5C5A | CC/CV |
| 16 | Rapid charge | Rapid charge:1C5A | CC/CV |
| 17 | Standard discharge | Standard discharge Constant Current 0.2C5A, Cut-off Voltage 2.75±0.05V | CC |
| 18 | Maximum continuous discharge | Max Discharge Constant Current 10C5A, Cut-off Voltage 2.75±0.05V | CC |
| 19 | Operation temperature (Ambient) | Charge:0ºC~45ºC Discharge:-20ºC~55ºC | At 60±25%RH |
| 20 | Storage temperature | Less than 3 months:-20~45ºC Less than 1 year:-20~25ºC | At 60±25%RH |
Battery Performance
| No. | Test Item | Test Method | Test Standard |
| 1 | Normal temperature discharge performance | Standard charge, then rest for 10min and discharge at 1C5A,5C5A, 10C5Arespectively. | Discharge capacity/First cycle capacity×100% 1C5A≥100% 5C5A≥96% 10C5A≥95% |
| 2 | Normal Temperature Storage | Store for 28 days after standard charge, then discharge at 0.2C5A to 2.75V;Then standard charge/discharge cycle for 3 times to obtain the recoverable capacity. | Residual capacity≥First cycle capacity×85% Recoverable capacity≥ First cycle capacity×92% |
| 3 | Cycle Life | The cell is charged at 1C5A, and discharged at a constant current of 10C5A, then stored 30 min.After 300 charge-discharge cycles the residual discharge capacity is above 80% of first capacity under rate discharge (10C5A). | ≥300 cycles (Charge:1C5A,4.2V,CC CV 0.01 C5A Cut-off, Discharge:10C5A,2.75V discharge Cut-off ) |
| 4 | Storage Characteristics | Stored for 12months in room-temperature at 50% DOD.Cell shall be conducted standard charge/discharge cycle for 5 times to obtain the recoverable capacity after storage. | Recoverable capacity≥ First cycle capacity×90% |
| 5 | Discharge temperature Characteristics | Standard charged in normal temperature, stored at the following temperature for 3h, then discharged at constant current of 0.2C5A. | Discharge capacity/First cycle capacity (25ºC)×100% -10ºC ≥70%(2.5V) 0ºC ≥85% 25ºC ≥100% 55ºC ≥90% |
| No. | Test Item | Test Method | Standard |
| 1 | Overcharge | Standard discharged, then charge at 3C5A constant current to 10V. | No fire, No explosion |
| 2 | Forced discharge | Standard discharged, then discharge at 1C5A constant current,time:≥90min | No fire,No explosion |
| 3 | External Short-circuit | After standard charge, short-circuit the cell by connecting the positive and negative terminals of the cell directly with Cu wire with a resistance less than 80±20mΩ for 1h. | No fire,No explosion, the cell surface-temperature is less than 150ºC. |
| 4 | Impact | After standard charge, cells are impacted with their longitudinal axis parallel to the flat surface and perpendicular to the longitudinal axis of the 15.8mm diameter bar. The hammer of 9.1Kg is dropped from a height of 610mm onto the bar. | No fire,No explosion |
| 5 | Crush | After standard charge, Cells are crushed with their longitudinal axis parallel to the flat surface of the crushing apparatus. The crushing is to be continued until a pressure reached to 13KN. The maximum pressure has been obtained, then released it at once. | No fire,No explosion |
| 6 | Hot oven | After standard charge, Cells are heated in a circulating air oven at a rate of 5±2ºC per minute to 130±2ºC and remained for 30 minutes. | No fire,No explosion |
| No. | Test Item | Test Method | Standard |
| 1 | Temperature Cycle | Standard charged, and placed in a test chamber and subjected to the following cycles: a. Raising the temperature to 72°C ±2°C within 30 minutes and maintaining this temperature for 6 hours; b. Reducing the temperature to minus -40°C ±2°C within 30 minutes and maintaining this temperature for 6 hours; c. Repeating the sequences for 10 times, and storing the cells for 24 hours in the condition of | No leakage,No fire,No explosion. |
| 2 | Drop | After standard charge, Cells are dropped from a height of 1.5m to wooden board in X,Y,Z directions twice respectively(total 6 times). | No fire,No explosion. |
| 3 | Vibration | After the battery is charged, it is fixed on the vibration table, vibrates with sine waves, and sweeps from 7Hz to 200Hz and returns to 7Hz in a logarithmic sweep mode within 15 minutes. Vibration is carried out in three directions perpendicular to each other(one of which must be perpendicular to the plane where the positive and negative poles of the sample are located). Each direction is repeated 12 times according to the above logarithmic sweep frequency method and vibrates 3h The logarithmic sweep frequency is as follows: 7Hz -18 Hz Maintain peak acceleration of 9.8 m/S2, maintain amplitude at 0.8 mm(displacement 1.6 mm) until peak acceleration reaches 78.4 m/S2(frequency approximately 50), maintain peak acceleration of 78.4 m/S2 until frequency increases to 200 Hz | No leakage, No fire,No explosion. |
| 4 | Low pressure (altitude simulate) | After standard charge, cells are stored under the atmosphere pressure of 11.6KPa for 6 hours. | No leakage,No fire, No explosion. |
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