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What is the standard charge retention test?

Views: 0     Author: Site Editor     Publish Time: 2023-08-02      Origin: Site

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IEC stipulates that the standard charge retention test of Nickel–metal hydride battery is:


After the battery is discharged at 0.2C to 1.0V, it is charged at 0.1C for 16 hours. After 28 days of storage at 20 ℃± 5 ℃ and 65% ± 20% humidity, it is discharged at 0.2C to 1.0V, and the Nickel–metal hydride battery should be charged for more than 3 hours.


According to national standards, the standard charge retention test for lithium batteries is as follows: (IEC has no relevant standards) The battery is discharged at 0.2C to 3.0/cell, then charged at 1C constant current and voltage to 4.2V, with a cut-off current of 10mA. After 28 days of storage at a temperature of 20 ℃± 5 ℃, it is discharged at 0.2C to 2.75V, and the discharge capacity is calculated. Compared with the nominal capacity of the battery, it should not be less than 85% of the initial capacity.


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