Group matching method for recycling of recovered power batteries

Abstract

The invention discloses a group matching method for recycling of recovered power batteries. The method comprises the steps of establishing a database, measuring the voltage and the internal resistance of the recovered power batteries, selecting the recovered power batteries with the voltage and the internal resistance within preset ranges, performing charging and discharging detection on the selected recovered power batteries to acquire the capacity of the recovered power batteries and corresponding relations between charging states and the voltage during charging, selecting the recovered power batteries with the capacity within preset ranges, matching the corresponding relations between the charging states and the voltage during the charging of the selected recovered power batteries with corresponding relations between charging states and the voltage during the charging of the power batteries in the database at different cycle periods, and performing group matching on the recovered batteries with the corresponding relations between the charging states and the voltage during the charging within preset ranges. The group matching method for the recycling of the recovered power batteries can perform group matching according to the attenuation degree of the recovered power batteries, thereby improving the accuracy and the reliability of the group matching.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of batteries, in particular to a grouping method for recovering and reusing power batteries. [0003] 【Background technique】 [0004] With the comprehensive and rapid development of new energy vehicles, the number of power batteries used will be very large, and the number of recycled power batteries will also be amazing. Since these recovered power batteries still have about 80% of their initial capacity, they are not suitable for being scrapped directly to cause a waste of resources. Instead, they can be regenerated step by step in fields such as energy storage and UPS that have relatively low requirements for battery usage. use. [0005] The existing grouping method of recycling power batteries is mainly based on capacity and internal resistance, but it does not take into account the different degrees of attenuation caused by the battery in the early cycle process, so it cannot effectively select ...

AI Technical Summary

Problems solved by technology

[0005] The existing grouping method for recycling power batteries is mainly based on capacity and internal resistance, but does not take into account the different degrees of attenuation caused by the battery in the early cycle process, so that it cannot effectively select batteries with the same attenuation degree. Matching groups are reused, which affects the accuracy and reliability of matching groups

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