For Ni-Cd and Ni-MH battery:
As the standard test on charge retention lasts too longer, the 24h self-discharge become the most common way to take fast test. The cell should have been discharge at 0.2C to 1.0V prior the test. It shall be charged at 1C for 80mins, and rested for 15mins, then discharged at 1C to 1.0V and the cell capacity C1 are gained. Charge the cell at 1C for 80mins, and rest for 24h, then test the 1C capacity C2, the C1C2/C1×100% should less than15%.
For Li-ion battery:
The most common way to take fast test for Li-ion was same as Ni-Cd and Ni-MH battery. The cell should have been discharge at 0.2C to 3.0V, charged under the constant current and voltage 1C to 4.2V, eng voltage 100mA, and rest for 24h, then test the 1C capacity C2, the C1 C2/C1×100% should more than 99%. |
