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Method and device for judging the state of health of a battery

A battery health status and battery technology, applied to the judgment of battery health status, judging the field of lithium-ion battery/battery pack health status, can solve the problems of reducing the difficulty of testing and the difficulty of battery health status testing

Active Publication Date: 2021-02-02
天津荣盛盟固利新能源科技有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The object of the present invention is to provide a method and device for judging the state of battery health in view of the above defects, so as to solve the problem of difficulty in testing the state of battery health in the prior art and achieve the effect of reducing the difficulty of testing

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  • Method and device for judging the state of health of a battery
  • Method and device for judging the state of health of a battery
  • Method and device for judging the state of health of a battery

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Embodiment Construction

[0064] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0065] According to an embodiment of the present invention, a method for judging the state of health of a battery is provided. see Figure 1-Figure 7 A schematic structural view of an embodiment of the method of the present invention is shown. The method for judging the state of health of the battery may include:

[0066] At step S110, one or several characteri...

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Abstract

The invention discloses a method and device for judging the state of health of a battery. The method includes: acquiring one or several characteristic frequency points of a new battery and the electrochemical impedance at the characteristic frequency; wherein, the characteristic frequency points can reflect the Describe the internal state of the battery; based on the characteristic frequency corresponding to the characteristic frequency point of the new battery, excite the old battery to determine the current electrochemical impedance of the old battery; compare the electrochemical imaginary impedance of the new battery and the old battery at the characteristic frequency, Determine the aging degree of the old battery. The solution of the present invention can overcome defects such as high difficulty in testing in the prior art (for example: it is difficult to reflect the aging condition of the electrochemical reaction inside the battery, and often stays in the external characteristics), high cost and short service life, and realize that the test is difficult , low cost and long service life.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a method and device for judging the health state of a battery, in particular to a method for judging the health state of a lithium-ion battery / battery pack and a device corresponding to the method, and more specifically to a A method for judging the state of health of a lithium-ion battery / battery pack by using the characteristic frequency of an electrochemical process, and a device corresponding to the method. Background technique [0002] As the number and frequency of use of electric vehicles continue to increase, how to non-destructively and quickly diagnose the health status of on-board batteries is of great significance to both car owners and car companies. [0003] The internal mass transfer process and electrochemical reaction are very complicated when the battery is working. A good battery health diagnosis method should reflect the changes inside the batter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/392G01R31/389
Inventor 吴宁宁闻斌刘建红刘宇隆
Owner 天津荣盛盟固利新能源科技有限公司
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