Uniform charging method and uniform charging device for lithium battery packs

Abstract

The invention relates to a battery charging technology, and in particular relates to a uniform charging method and a uniform charging device for lithium battery packs. The method comprises the steps that: firstly, the lithium battery pack is overall charged; the voltage of each battery cell is basically detected in real time in the overall charging process; the charging process can be accelerated by virtue of the overall charging manner; the overall charging process is stopped when the voltage of any battery cell reaches a preset threshold; the voltage of each battery cell of the battery pack is ordered from small to large; the voltage of the backmost battery cell with the highest voltage is used as a reference voltage of the uniform charging process; the uniform charging process is started from the headmost battery cell with the lowest voltage till the voltage of the headmost battery cell reaches the reference voltage; then each battery cell with the voltage lower than the reference voltage is uniformly charged in sequence from small to large till the voltage of the battery cell reaches the reference voltage; and thus far, the charging operation is ended. The uniform charging method and the uniform charging device have the advantages of reasonable structure, simplicity and convenience in operation, reliable work and the like.

Description

technical field [0001] The present invention relates to battery charging technology, specifically a method that can realize balanced charging for any battery cell in a series lithium battery pack, so that the single cells in the battery pack can obtain energy in a balanced manner during each charging process. The method and device for equalizing the charging of lithium battery packs ensure that the lithium battery packs connected in series can obtain the maximum energy, effectively improve the working efficiency of the batteries, and prolong the service life of the batteries. Background technique [0002] Lithium-ion power batteries have many excellent properties, and have been widely and important used in the fields of electric vehicles, submarines, aviation and aerospace. In the actual application process, in most cases, multiple lithium batteries of the same manufacturer, the same model, the same specification and the same batch (hereinafter referred to as Sitong) are us...

AI Technical Summary

Problems solved by technology

Therefore, as the charging and discharging process of the battery pack continues, the total capacity of the lithium battery pack in series will become smaller and smaller, which will seriously affect the quality and life of the battery.

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