The new charging method and validation
Release time：2017-6-7 14:39:25 Click on the number of times：1431
As voltage change rate of the battery is analyzed under the 25A constant current, so the battery needs charge under by 25A constant current. It judges constant current charging end at 3.5 V to 3.6 V through the voltage change rate of the battery, then begins to decrease charging current to the battery voltage does not exceed the charging cut-off voltage. The charging is end when the current is reduced to the set value. According to previous analysis, the battery voltage change rate is 0.005V/min when discharge depth is about 1, and the battery voltage change rate is 0.1V/min when discharge depth is about 0 at 3.50 V to 3.60 V. When constant current charging process is complete, then begins to decrease charging current to the battery voltage does not exceed the charging cut-off voltage U cut . Experiments validation shows that battery can be charged into more than 90% of capacity at the end of constant current phase by the new method of LiFePO 4 battery. The battery can be charged into 100% of capacity at the end of charging. This is consistent with the purpose of design.
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