Charging method and device

Abstract

The invention relates to a charging method and device. The charging method comprises the following steps: charging a battery by adopting a first charging mode, wherein in the process of charging the battery by adopting the first charging mode, the following operations are performed: from a first moment to a second moment later than the first moment, carrying out constant-current charging on the battery at a first current value; carrying out depolarization operation on the battery from the second moment to a third moment later than the second moment, wherein in the depolarization operation process, the current value of the battery is smaller than a second current value, and the second current value is smaller than the first current value; and performing constant-current charging on the battery at the second current value from the third moment to a fourth moment later than the third moment. According to the invention, the polarization generated by the battery is effectively relieved, sothat the charging speed of the battery is effectively improved; and in the depolarization operation process of the battery, the current value of the battery is smaller than the second current value, so that the heating phenomenon of the battery can be effectively relieved, and the service life of the battery can be prolonged.

Description

Technical field [0001] The present disclosure relates to the field of electronic technology, and in particular to a charging method and device. Background technique [0002] Generally speaking, there are two ways to charge the battery: constant current charging and constant voltage charging. Among them, constant current charging can be expressed as keeping the charging current constant during the charging process until the charging voltage value of the battery reaches a preset value. Constant voltage charging can be expressed as: during the charging process, the voltage of the charging power supply maintains a constant value for the entire charging time, and as the battery terminal voltage gradually increases, the current gradually decreases. When using constant current charging to charge the battery, a large current will cause the battery to produce greater polarization, resulting in a decrease in the charging speed, and a large current will cause the battery to heat up. In rel...

AI Technical Summary

Problems solved by technology

When using constant current charging to charge the battery, the high current will lead to greater polarization of the battery, resulting in a decrease in charging speed, and the high current will cause the battery to heat up. In related technologies, in order to alleviate the phenomenon of battery heating, the battery will be charged After constant current charging for a period of time, continue to charge the battery with a reduced charging current value. However, in this case, the polarization of the battery cannot be alleviated, and it is very likely to be further aggravated, which will further lead to charging speed drop

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