Power battery fault diagnosis method based on sliding window

Abstract

The invention discloses a power battery fault diagnosis method based on a sliding window. The method comprises the following steps: acquiring single voltage values of a power battery for multiple times; establishing a single voltage matrix according to the single voltage values; setting the size of a sliding calculation window, wherein the calculation window comprises all single voltage values ofpreset sampling times; acquiring the single voltage value from the first row of the single voltage matrix by using the calculation window; obtaining a median of each row of single voltage values in the calculation window; subtracting the median of each row from each monomer voltage value of each row to obtain a first result; calculating a variance value of each column in the first result to obtaina second result; carrying out abnormal variance value screening on the second result by adopting a Pauta criterion; and moving the calculation window downwards for one row, and skipping to the step to obtain the median of each row of monomer voltage values in the calculation window until the traversal of the monomer voltage matrix is finished. According to the invention, the single power batterycan be diagnosed in real time.

Description

technical field [0001] The invention relates to the technical field of power battery fault diagnosis, in particular to a power battery fault diagnosis method based on a sliding window. Background technique [0002] There are many existing power battery fault diagnosis methods, such as multi-level 3σ screening method, entropy weight method, entropy-based fault diagnosis method, etc., but all of them have the problem of large amount of calculation and difficult to apply online in real time. Contents of the invention [0003] The purpose of the present invention is to provide a power battery fault diagnosis method based on a sliding window, which can perform real-time diagnosis on a single power battery. [0004] To achieve the above object, the present invention provides the following technical solutions: [0005] A method for fault diagnosis of a power battery based on a sliding window, comprising: [0006] Obtain the single voltage value of the power battery multiple tim...

AI Technical Summary

Problems solved by technology

[0002] There are many existing power battery fault diagnosis methods, such as multi-level 3σ screening method, entropy weight method, entropy-based fault diagnosis method, etc., but all of them have the problem of large amount of calculation and difficult real-time online application

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