Battery charging method and device

Abstract

The invention discloses a battery charging method. The method includes the following steps that: the current temperature of a battery and the electric quantity percentage of the battery are obtained; a battery characteristic relationship table which is established in advance in queried according to the current temperature of the battery and the electric quantity percentage of the battery, so that the inner resistance of the battery corresponding to the current temperature and electric quantity percentage of the battery can be obtained; the charging cut-off voltage of the battery is obtained through calculation according to the inner resistance of the battery, charging current and preset charging limiting voltage and based on preset calculation rules; the battery is charged according to the charging cut-off voltage; and when the electric quantity percentage of the battery changes in a preset time period, the charging cut-off voltage of the battery is re-calculated according to the above steps, and the battery is charged according to the re-calculated charging cut-off voltage. The invention also discloses a battery charging device. With the battery charging method and device of the invention adopted, with the safety of the battery ensured, the charging speed of the battery can be improved, and the available capacity of the battery can be improved.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a battery charging method and device. Background technique [0002] At present, among many types of batteries, lithium batteries have many advantages such as high voltage platform, high energy density, long service life, environmental protection and no memory effect, so more and more mobile terminals use lithium batteries as their rechargeable batteries. . However, due to the limitations of some characteristics of the lithium battery itself, the user has strict requirements on the charging method when using the lithium battery. The user needs to formulate a reasonable charging method according to the characteristics of the lithium battery itself in order to give full play to the above advantages of the lithium battery. , and ensure its service life. [0003] A lithium battery can be equivalent to an ideal voltage source and a variable resistance resistor, which is the inter...

AI Technical Summary

Problems solved by technology

However, in the prior art, when charging the lithium battery of the mobile terminal, the voltage division problem of the internal resistance of the lithium battery for charging it is usually not considered, that is, in the prior art, the charging of the lithium battery is usually Charge the battery according to the rated charging limit voltage marked on the battery case, resulting in slow charging speed and at the same time, the capacity of the battery is not fully utilized

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