Quick sorting system and method for retired power batteries

Abstract

The invention relates to the technical field of battery sorting, and discloses a quick sorting system for retired power batteries. The quick sorting system comprises a management platform, a test system, an acquisition system, a control system, an input and output system, a power supply system, an alternating current power grid and a retired battery module. The quick sorting method for the retired power batteries comprises the following operation steps of S1, data import and pretreatment; S2, a pulse charging and discharging test and index calculation; S3, a constant-current charging and discharging test; S4, circulating the step S2 to the step S3 for not less than 6 times; S5, standardized Euclidean distance and consistency index calculation; and S6, battery module sorting. The charging and discharging current and voltage data of the batteries are obtained in real time according to a set test method, and the SOH of each retired battery can be quickly calculated in combination with a diagnosis model. The quick sorting system and method can also be applied to SOH calculation of different types of retired power batteries by modifying the diagnosis model, so that the problems of low efficiency and high cost of an existing retired power battery sorting method are solved.

Description

technical field [0001] The invention relates to the technical field of battery sorting, in particular to a system and method for quick sorting of decommissioned power batteries. Background technique [0002] With the rapid promotion of electric vehicles in the past ten years, a large number of decommissioned power batteries will inevitably be produced. Although decommissioned power batteries cannot be used in the field of electric vehicles, most of the batteries still have application value in other energy storage applications, and only a small part needs to be scrapped. Recycling. [0003] The single decommissioned battery with severely degraded performance is the main factor leading to the decommissioning of the battery pack as a whole. It not only poses safety hazards, but also reduces the available energy of the battery pack. This phenomenon leads to the fact that decommissioned battery packs cannot be directly assembled for energy storage systems, and must be disassemb...

AI Technical Summary

Problems solved by technology

[0003] The single decommissioned battery with severely degraded performance is the main factor leading to the decommissioning of the battery pack as a whole, which not only poses safety hazards, but also reduces the available energy of the battery pack

This phenomenon leads to the fact that retired battery packs cannot be directly assembled for energy storage systems, and must be disassembled and sorted

[0004] In order to ensure the accuracy of battery sorting, the traditional battery sorting method needs to invest in large-scale testing equipment, manpower and time to conduct a comprehensive test on the battery. The efficiency is too low and the cost is high, so it is not suitable for cascade utilization in the field of energy storage.

[0005] It is difficult to collect historical operation data of decommissioned power batteries, and it is impossible to apply battery screening technology based on big data. In the existing technology, there have been new solutions for multi-level sorting batteries using multi-parameter indicators such as measured capacity, internal resistance, and voltage curve turning point. , but it needs to carry out multiple full charge and full discharge cycle tests on the battery, which still has the defects of low efficiency and high cost

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