step 1 | Capacity and DC impedance calibration at room temperature (25˚C) |
step 2 | At constant temperature (25 0.5C), the discharge was 2.8V constant at constant flow rate |
step 3 | Hold the battery for 5 hours at low temperature (X˚C) |
step 4 | At low temperature (X˚C), the charge is first charged at 0.5C constant current to 4.2V, then the constant voltage is charged until the current is less than or equal to 0.1C. |
step 5 | 0.5C constant current discharge at low temperature (X˚C) |
step 6 | Capacity and DC impedance calibration at room temperature (25˚C) |
step 7 | Repeat 2 steps 2 - step 6 |
step 8 | Replace the battery, change X, repeat step 1 - step6 |