Battery charging method and device

Abstract

The embodiment of the invention provides a battery charging method and device. The battery charging method provided by the embodiment of the invention comprises the following steps: performing pulse charging on a battery for at least two times and stopping pulse charging for the battery until the voltage of the battery reaches a voltage threshold; performing constant-voltage charging on the battery and stopping constant-voltage charging for the battery until the current of the battery reaches a cutoff current, wherein each time of pulse charging comprises the following steps: performing constant-current charging on the battery with a first constant current; performing constant-current charging on the battery with a second constant current; resting the battery; and performing constant-current discharging on the battery with a third constant current. According to the technical scheme provided by the invention, the process of each time of pulse charging comprises the steps of resting the battery and discharging the battery, so that the polarization phenomenon generated by the battery in the charging process can be eliminated, and therefore, the safety of the battery is improved; and with adoption of a pulse charging manner, the charging time is shortened, and therefore, the charging speed is increased.

Description

technical field [0001] The invention relates to the field of battery technology, in particular to a battery charging method and device. Background technique [0002] With the continuous improvement of modern technology, people are more and more dependent on the terminal. As a battery that provides electrical energy for the terminal, how to enhance battery life and improve charging speed has attracted more and more attention. [0003] For charging the battery, the most common charging method in the prior art is: first charge with a constant current until the battery reaches a certain voltage, and then charge with a constant voltage until it reaches the cut-off current. Using this method for charging, if you want to increase the charging speed, you need to use a larger constant current to charge the battery, and the anode potential will drop rapidly due to the larger ohmic polarization and concentration polarization, which will cause lithium ions to The surface of the anode i...

AI Technical Summary

Problems solved by technology

Using this method for charging, if you want to increase the charging speed, you need to use a larger constant current to charge the battery, and the anode potential will drop rapidly due to the larger ohmic polarization and concentration polarization, which will cause lithium ions to The surface of the anode is reduced to metal lithium, which will cause a great safety risk to the lithium battery and promote the rapid decline of the battery capacity

[0004] Therefore, the charging method in the prior art is used to charge the battery, and the charging speed is relatively slow. If the charging parameters in the charging method of the prior art are changed to improve the charging speed, the safety factor is relatively low.

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