BMS product line bundle contact failure online monitoring safety repair method

Abstract

This invention discloses a safe repair method for online monitoring of poor wiring harness contact faults in BMS products, comprising: determining whether a poor wiring harness contact fault has occurred in the BMS product based on preset conditions; determining the start time of the poor wiring harness contact fault and the time of the wiring harness disconnection fault; collecting measurement data of abnormal individual cells corresponding to the start time of the poor contact fault and the time of the disconnection fault; analyzing the relationship between battery voltage, current and battery state of charge through the battery working mechanism, and establishing a relationship model; calculating unknown parameters in the relationship model, and calculating and supplementing discarded values. This method utilizes the battery working principle and the correlation relationship of individual cell data to interpolate missing data. Compared with direct fitting function interpolation, the interpolation method based on the battery working principle and parameter correlation model has a more sufficient theoretical basis, and the improved data can help to accurately assess the reliability of BMS products.

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