Battery capacity evaluation method, device, equipment and medium
A battery capacity, to-be-evaluated technology, applied in measuring devices, measuring electrical variables, measuring electricity, etc., can solve problems such as inability to be disassembled, and achieve the effect of simple operation procedures and saving testing resources.
Active Publication Date: 2022-04-01
SVOLT ENERGY TECH (WUXI) CO LTD
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Problems solved by technology
For modules whose capacity decays too quickly during the cycle, cause analysis is required, especially the capacity analysis of single cells. However, since the modules cannot be disassembled after being assembled, how to accurately estimate the capacity of each cell in the module become a technical problem
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[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the appended The figures are only for the purpose of illustration and description, and are not used to limit the protection scope of the present application. Additionally, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented in accordance with some embodiments of the application. It should be understood that the operations of the flowcharts may be performed out of order, and steps that have no logical context may be performed in reverse order or concurrently. In addition, those skilled in the art may add one or more other operations t...
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The invention provides a battery capacity evaluation method and device, equipment and a medium, and the method comprises the steps: obtaining test data of a target battery module comprising a plurality of battery cells when the target battery module is subjected to a cycle test; selecting a to-be-evaluated battery cell and reference battery cells for evaluating different sub-capacities included in the to-be-evaluated battery cell in the charge state use range of the target battery module from a plurality of battery cells included in the target battery module; based on comparative analysis of reference test data of a reference battery cell in the test data of the plurality of battery cells and to-be-evaluated test data of a to-be-evaluated battery cell, determining each sub-capacity included in the to-be-evaluated battery cell within the charge state use range of the target battery module; and determining the overall capacity of the to-be-evaluated battery cell according to each sub-capacity included in the to-be-evaluated battery cell. The to-be-evaluated battery cell is evaluated according to different battery cells in the target battery module, so that the more real overall capacity of the to-be-evaluated battery cell can be obtained.
Description
technical field [0001] The present application relates to the technical field of battery capacity evaluation, in particular, to a method, device, equipment and medium for battery capacity evaluation. Background technique [0002] With the popularity of new energy electric vehicles, battery manufacturers are paying more and more attention to the performance of batteries, especially the service life of batteries, which is directly related to consumers' purchase intentions. In the process of battery research and development, the life of the battery is often based on the battery test standard manual or the enterprise battery test standard manual, and the battery life characteristics are obtained according to the test results. The battery is composed of various components, and the life of the battery is also determined by each component. [0003] The modules of the battery pack generally need to go through various safety and performance verifications before leaving the factory. ...
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IPC IPC(8): G01R31/387
CPCY02E60/10
Inventor 赵龙灿李俭梁赛贾建豪蒋龙
Owner SVOLT ENERGY TECH (WUXI) CO LTD