Battery charge control method

Abstract

The invention provides a charging control method of a battery. The charging control method comprises the following steps: analyzing the battery so as to obtain a changing curve of the positive electrode electric potential and the negative electrode electric potential of the battery under the different electric charging states; determining the maximum charging multiplying power of the battery under the different electric charging states and at different temperatures according to the changing curve of the positive electrode electric potential and the negative electrode electric potential, and generating a relational graph between the maximum charging multiplying power and the electric charging states and the temperatures of the battery according to the maximum charging multiplying power; determining allowable current maximum charging multiplying power of the battery according to the relational graph, the current temperature and the current electric charging state of the battery, and charging the battery according to the current maximum multiplying power. According to the charging control method of the battery, the charging multiplying power of the battery is actively controlled according to the current electric charging state and the current temperature of the battery, the charging multiplying power is in the maximum value from beginning to end, therefore, the rapidest charging is achieved, and the service life of the battery can not be greatly affected.

Description

technical field [0001] The invention relates to the technical field of battery management, in particular to a battery charging control method. Background technique [0002] There have been many charging methods and charging devices for rechargeable batteries at present, and the technology development is relatively mature. However, the charging method of lithium-ion batteries is mainly the constant current-constant voltage charging mode. The constant voltage duration of this charging method is relatively long, and it is difficult to achieve the purpose of fast charging. However, as more and more people use lithium-ion batteries as energy supply devices for daily electronic products, especially the higher demand for lithium-ion batteries in the development of electric vehicles, the rapid charging method of rechargeable lithium-ion batteries has become a research topic. Hotspots, various research results are emerging in an endless stream. CN200610034990.6, CN200810029444, CN2...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the electrochemical reaction mechanism inside the battery, when the charging rate is large enough, side reactions will occur inside the battery, which will affect the service life of the battery

Moreover, according to the experimental results, in different SOC states, the maximum charging rate that the battery can withstand is different: as the SOC increases, the maximum charging rate that the battery can withstand will become lower and lower.

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