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Battery cycle life prediction method, battery cycle life prediction device and storage medium

A technology of battery cycle and prediction method, which is applied in the direction of measurement device, measurement of electricity, measurement of electricity variables, etc., can solve the problems of high energy consumption, inability to accurately reflect battery cycle life, long cycle, etc.

Inactive Publication Date: 2019-09-10
蜂巢能源(武汉)有限公司
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Problems solved by technology

Therefore, it is very important to accurately predict the cycle life of the battery, and the current test for the cycle life of the battery not only has a long cycle, but also consumes a lot of energy, and cannot accurately reflect the cycle life of the battery.

Method used

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  • Battery cycle life prediction method, battery cycle life prediction device and storage medium
  • Battery cycle life prediction method, battery cycle life prediction device and storage medium
  • Battery cycle life prediction method, battery cycle life prediction device and storage medium

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Embodiment Construction

[0050]In order to have a more detailed understanding of the features and technical content of the embodiments of the present invention, the following will be described in detail in conjunction with the accompanying drawings and the implementation of the embodiments of the present invention. The attached drawings are for reference only and are not intended to limit the implementation of the present invention. example.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein in the description of the present invention is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0052] It should be noted that, in the embodiments of the present invention, the terms "comprising", "comprising" or any other variant thereof are intended to cover a non-exclusive inclusio...

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Abstract

The embodiment of the invention provides a battery cycle life prediction method, a battery cycle life prediction device and a storage medium. The method comprises the steps of: performing performancetest processing on a lithium ion battery according to different cyclic numbers respectively, and obtaining the capacity retention ratio of the lithium ion battery based on a test result; according toa pre-set manner, obtaining the direct-current internal resistance value of the lithium ion battery subjected to performance test processing according to different cyclic numbers respectively; on thebasis of the capacity retention ratio and the direct-current internal resistance value of the lithium ion battery, determining a first function; on the basis of the corresponding cyclic number and thedirect-current internal resistance value of the lithium ion battery, determining a second function; and, on the basis of the pre-set value of the capacity retention ratio of the lithium ion battery,the first function and the second function, determining the cycle life of the lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of battery detection, in particular to a method, device and storage medium for predicting battery cycle life. Background technique [0002] With the widespread application of lithium-ion power batteries in our country, especially the rapid development of new energy electric vehicles. According to the relevant national standards for the use of electric vehicle batteries, the effective capacity of power batteries for electric vehicles shall not be less than 80% of the rated capacity. The cycle life of the battery is the number of cycles when the battery capacity decays to 80% of the rated capacity. Battery cycle life is an important indicator of battery performance. Therefore, it is very important to accurately predict the cycle life of the battery, and the current test for the cycle life of the battery not only has a long cycle, but also consumes a lot of energy, and cannot accurately reflect the cycle life...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/392G01R31/3842G01R31/389
CPCG01R31/3842G01R31/389G01R31/392
Inventor 种传宾郭倩吴军
Owner 蜂巢能源(武汉)有限公司
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