Battery SOC and SOH correction system and method, computer equipment and computer readable storage medium

Abstract

The invention discloses a battery SOC and SOH iterative correction system and method, computer equipment and a computer readable storage medium, and the system comprises a parameter obtaining module and aSOC correction module, the parameter obtaining module is used for obtaining the initial capacity and the initial SOC value of a battery, the (n-m) th initial capacity correction value, the nth SOC value, the nth SOH value and the (n-m) th SOH value, n is an integer greater than or equal to 2, and m is an integer greater than or equal to 1 and is smaller than n; the SOC correction module is used for selecting a certain specific working condition to charge and discharge the battery so as to output an nth battery judgment SOC value and an nth battery actual SOC value, correcting the SOC according to the actual SOC value of the battery at the nth time when the difference between the actual SOC value of the battery at the nth time and the SOC value judged by the battery at the nth time is larger than or equal to a preset threshold value, acquiring an initial capacity correction value at the nth time, and iterating the initial capacity correction value at the nth time with the initial capacity correction value at the (n-m) th time, otherwise, not correcting the SOC; and the SOH correction module is used for calculating the nth SOH actual value to correct the SOH and iterating the nth SOH actual value to the (n-m) th SOH value to verify the SOC correction accuracy.

Description

technical field [0001] The present invention relates to the technical field of power batteries, in particular to a battery SOC and SOH correction system, method, computer equipment and computer-readable storage medium. Background technique [0002] The existing patents CN106772101B, CN103616646A, and CN108226783A describe the method of using SOC / OCV curve correction, which needs to rely on a large number of battery test data and the curve fitted according to the test data, wherein SOC (State of Charge) refers to the state of charge of the battery , OCV (Open Circuit Voltage) refers to the open circuit voltage. This method not only requires a large number of tests in the laboratory according to the actual working conditions, but also because the working conditions of the laboratory are quite different from the actual vehicle environment, the actual use accuracy of the test data will naturally be relatively large deviation. Moreover, because the working environment / working c...

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Problems solved by technology

[0003] Purpose of the invention: To provide a battery SOC that solves the problems of large deviation of test data required for correction by curve fitting, power battery is always in a changing state but has few correction opportunities, unsatisfactory correction conditions, poor correction accuracy due to battery life attenuation, etc. and SOH correction system, method, computer device and computer readable storage medium

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