Quick charging method for electric automobile storage battery

Abstract

A quick charging method for an electric automobile storage battery includes the steps that the initial to-be-charged amount and the maximum acceptable start charging current I1 are obtained through an electric automobile electricity storage management unit controller; the maximum acceptable charging current I2 is obtained according to a restraint condition; according to a maximum acceptable charging current exponential decay curve, I1 serves as the start current to charge the electric automobile storage battery; when the current decays to I2, charging and discharging and charging stopping are conducted, the charging current is increased to I1 from I2, and the electric automobile storage battery is charged according to a new maximum acceptable charging current exponential decay curve; and in this way, the electric automobile storage battery is charged through constant current I3 till the electric quantity charged at a single time is smaller than twice of the electric quantity discharged at a single time, and charging is stopped till the battery is fully charged. By the adoption of the method, the electric automobile storage battery is charged mainly according to the maximum acceptable charging current exponential decay curve, the acceptable charging current capacity of the battery is improved in the charging process, it is guaranteed that no gassing is generated in the charging process, and the charging time is greatly shortened.

Description

Technical field: [0001] The invention relates to a fast charging method for an electric vehicle storage battery. Background technique: [0002] In order to protect the environment and reduce motor vehicle exhaust emissions, electric vehicles are more and more concerned and favored by countries all over the world. In particular, the Chinese government has begun to increase support for electric vehicles in recent years, and has introduced a variety of preferential policies to vigorously promote the use of electric vehicles. However, at present, most of the charging methods for electric vehicle batteries are constant current and constant voltage charging, self-setting variable current charging and pulse charging. These charging methods are relatively time-consuming and cannot be completed in the shortest time. The charging of the vehicle battery is easy to cause inconvenience to people's travel. [0003] In 1967, American scientist Mas proposed the famous Mas three laws at th...

AI Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is to solve the problem that the existing charging method cannot guarantee that the battery of an electric vehicle can be charged within the shortest time without gassing, and proposes a fast charging method for a battery of an electric vehicle

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