SOC estimation and balance control system and method for electric vehicle battery management system

Abstract

The invention discloses an SOC estimation and equalization control system and method for an electric vehicle battery management system. The system comprises an acquisition module, a conversion module,a communication module, an SOC estimation module and an equalization module, wherein the acquisition module acquires parameter data; the conversion module converts the parameter data to obtain estimated input data; the communication module reads and transmits estimated input data; the SOC estimation module receives the estimation input data and performs estimation processing to obtain SOC value data; when the total current is smaller than zero, the equalization module selects the battery cells with the first target SOC values with the SOC values arranged in the front in an ascending order, and outputs a charging signal for charging; and when the total current is greater than or equal to zero, selecting the battery cells of the second target SOC value with the SOC values arranged in the front in a descending order, and outputting a discharge signal for discharging. By calculating the SOC value of the battery, equalization management is carried out when the electric quantity of the battery is inconsistent, safe use is realized, and the service life of the battery is prolonged.

Description

technical field [0001] The invention relates to the technical field of electric vehicle battery management, in particular to an electric vehicle battery management system SOC estimation and balance control system and method. Background technique [0002] With the development of the times and the continuous progress of society, people's material, cultural level and quality of life are getting higher and higher. The typical representative is reflected in the popularity of cars as a means of transportation. The popularization of automobiles has brought great convenience to our lives, but at the same time it is also facing two major problems, the lack of fossil energy and environmental pollution. Traditional cars mainly rely on fossil fuels to provide power, but fossil fuels are not renewable, and the massive use of energy will have a great impact on the environment we depend on for survival. Electric vehicles (Electric Vehicles, EVs) have the advantages of low emission, low no...

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Problems solved by technology

Traditional cars mainly rely on fossil fuels to provide power, but fossil fuels are non-renewable, and the extensive use of energy will have a great impact on the environment we depend on for survival

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