Lithium-ion battery cycle life prediction method, equipment, system and storage medium
A lithium-ion battery, cycle life technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of large energy consumption and long test time
Inactive Publication Date: 2020-07-07
蜂巢能源(武汉)有限公司
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[0004] In view of this, an embodiment of the present invention provides a lithium-ion battery cycle life prediction method, device, system, and storage medium to solve the problems of long test time and large energy consumption in the existing lithium-ion battery cycle life test
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[0034] 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.
[0035] 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.
[0036] 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 inclusi...
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The embodiment of the invention provides a method, device and system for predicting the cycle life of a lithium-ion battery and a storage medium. The method comprises the steps of detecting the capacity retention ratios corresponding to lithium-ion batteries with different numbers of charging and discharging cycles; disassembling the lithium-ion batteries with different numbers of charging and discharging cycles to obtain powder materials on pole plates; detecting the atomic mixed arrangement degree corresponding to the powder material on each pole plate; fitting a first function according toa corresponding relation between the capacity retention ratios and the atomic mixed arrangement degrees; fitting a second function according to a corresponding relation between the atomic mixed arrangement degrees and the numbers of charging and discharging cycles; and determining the cycle life of the lithium-ion battery through the first function and the second function according to a set threshold of the capacity retention ratio of the lithium-ion battery. The embodiment of the invention greatly reduces the time required by conventional testing, and effectively avoids the waste of resources.
Description
technical field [0001] The invention relates to the field of battery detection, in particular to a lithium ion battery cycle life prediction method, equipment, system and storage medium. Background technique [0002] The service life of the battery is an important indicator to measure the performance of the battery. With the rapid development of battery technology, the cycle life of the battery has reached 2000 or even more than 2500 times. Lithium-ion batteries are widely used due to their environmental friendliness, low pollution, long cycle life, and no memory effect. At present, the life test method widely used in the research and development, inspection and selection of lithium-ion batteries is to conduct cycle tests under certain working conditions, but the cycle test method has the disadvantages of long time consumption, large energy consumption, and slow product development progress. defect. [0003] In the process of implementing the technical solution of the embo...
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IPC IPC(8): G01R31/385G01R31/367G01R31/392
Inventor 种传宾郭倩
Owner 蜂巢能源(武汉)有限公司