Automobile battery monomer abnormality estimation method and device

Abstract

The invention provides an automobile battery monomer abnormality estimation method and device. The method comprises the following steps: monitoring and extracting battery use data when an automobile is started and shut down in real time; calculating a polarization voltage value of any battery monomer; calculating and analyzing a polarization voltage Z score value of each battery monomer, an accumulated deviation value of the polarization voltage of each battery monomer and a cosine set variance value of an included angle between any two battery monomers by using a Z score model, a statisticalmodel and an angle variance model; carrying out big data model training to obtain a relationship between a battery health state and abnormal quantification, and establishing a battery health state diagnosis database; and judging whether the battery reaches a preset condition of a battery health state diagnosis database or not according to three values so as to obtain a battery diagnosis result. According to the invention, the abnormal problem of the power battery system can be found in advance, early warning can be given, and accidents such as fire and explosion of an electric automobile can be reduced.

Description

Technical field [0001] The present invention relates to the field of automobiles, and more particularly to an automotive battery monomer abnormality prediction method and apparatus. Background technique [0002] Some battery systems may be due to changes in the material and material parameters inside the battery monomer, but the material and material parameters inside the battery monomer have changed, and it will not be quickly reacted. The battery system works, although some battery systems can work properly, they are still in the risk phase of failure. [0003] At present, most car companies are only detected on a battery system that has already occurred or failed, and does not detect the material and material parameters inside the battery cell, so that the abnormality of the battery monomer cannot be pre-estimated, so that it cannot be Possible troubleshooting can take precautions to avoid electric vehicle safety issues and failures. Inventive content [0004] One object of t...

AI Technical Summary

Problems solved by technology

[0004] One purpose of the present invention is to propose a method for predicting the abnormality of an automobile battery cell, so as to solve the problem that most car companies in the prior art only detect and judge the abnormal or faulty battery system, but do not detect the materials inside the battery cell. and material parameters, so that it is impossible to predict the abnormality of the battery cell in advance, so that it is impossible to take protective measures in advance for possible failures to avoid the safety problems and failures of electric vehicles.

Images