Recycling detection, screening and matching method and device for battery module

A battery module and detection method technology, which is applied in the direction of measuring devices, secondary battery testing, battery recycling, etc., can solve the problems of low efficiency in group matching, and achieve the effects of low manufacturing cost, high consistency, and short production cycle
CN106785178AActive Publication Date: 2017-05-31XJ POWER CO LTD +4
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XJ POWER CO LTD
Publication Date
2017-05-31

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Abstract

The invention relates to recycling detection, screening and matching method and device for battery modules. The method comprises the steps of carrying out charge and discharge performance testing on retired battery modules after standing by taking the battery modules as the maximum screening units to obtain maximum voltage and minimum voltage of single batteries; and when an absolute value of a difference value between the maximum voltage and minimum voltage is smaller than a set voltage difference threshold, judging that the retired battery modules can be recycled and carrying out matching according to the internal resistance and the capacity of the battery modules. The consistency of the single batteries is considered, the retired power battery modules are not split into single batteries for screening and matching, the battery modules are taken as objects for screening and matching, and the battery modules with good consistency of the single batteries are matched through judging open-circuit voltage of the single batteries. The work difficulty of cascade utilization of the matched batteries is greatly simplified, and the screened and matched power battery packs are short in production cycle, relatively high in consistency and low in manufacturing cost.
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Description

technical field

[0001] The invention belongs to the technical field of electric vehicles and new energy power batteries, and in particular relates to a battery module reuse detection, screening and assembly method and device. Background technique

[0002] The consistency screening of lithium-ion power batteries is mainly completed at the stage of battery production and assembly to meet the needs of grouping, and its related technical research is also mainly concentrated here, while the research on the reuse and screening of batteries in the middle and late stages of use is still in its infancy. At present, the application technology of power lithium-ion batteries in electric vehicles is becoming more and more mature, and the global lithium-ion battery market has shown geometric progression growth within a few years. In actual operation, when the battery is lower than 80% of the original capacity, it is no longer suitable for use in electric vehicles. However, the recycling r...

Claims

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