Lithium battery failure analysis method and device as well as electronic equipment and storage medium

A technology for failure analysis and lithium batteries, applied in measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of less analysis and research on NCA positive electrode + silicon carbon negative electrode lithium battery
CN110618387AActive Publication Date: 2019-12-27HUATING HEFEI POWER TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
HUATING HEFEI POWER TECH
Publication Date
2019-12-27

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Abstract

The embodiment of the invention provides a lithium battery failure analysis method and device as well as electronic equipment and a storage medium, wherein a cathode material of a lithium battery is NCA, and an anode material of the lithium battery is silicon carbide. The method comprises the following steps: according to a first-order derivative curve between battery capacity and voltage of an invalid lithium battery as well as a first-order derivative curve between battery capacity and voltage of a new lithium battery, calculating attenuation rates of the cathode material and the anode material of the invalid lithium battery; and analyzing the attenuation rates of the cathode material and the anode material, thus a reason for reduction of the battery capacity of the invalid lithium battery in rapid charging and discharging processes can be obtained, wherein the invalid lithium battery is obtained by performing cycle rapid charging and discharging on another new lithium battery for afirst preset number of times, and after a failure reason of an NCA cathode+silicon carbide anode battery is analyzed, a theoretical basis is conveniently provided for battery designers in design and improvement of batteries.
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Description

Technical field

[0001] This application relates to the field of power batteries, and specifically to lithium battery failure analysis methods, devices, electronic equipment and storage media. Background technique

[0002] With the rapid development of new energy vehicle technology, people have higher and higher requirements for the performance, safety and reliability of power batteries. NCA positive electrode + silicon carbon negative electrode lithium battery (N stands for nickel, C stands for cobalt, A stands for aluminum) has gradually been commercialized in new energy vehicles due to the advantages of long cruising range and high performance, but NCA positive electrode + silicon carbon negative electrode lithium The battery capacity will gradually decrease in the process of multiple rapid charging and discharging until it fails.

[0003] However, there are few studies on the failure principle of NCA positive electrode + silicon carbon negative electrode lithium battery, especi...

Claims

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