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Method for quickly judging whether retired battery can be subjected to cascading utilization

A step-by-step, fast technology, applied in the field of rapid judgment of whether decommissioned batteries can be used in steps, can solve problems such as the inability to realize fast regrouping and the inability to quickly judge the re-use of retired batteries, so as to save resources, judge accuracy, and reduce wasteful effect

Inactive Publication Date: 2018-09-28
桑顿新能源科技(长沙)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can achieve cascading utilization to a certain extent, it cannot quickly judge whether the decommissioned batteries can be reused in cascades, and at the same time cannot achieve rapid regrouping

Method used

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  • Method for quickly judging whether retired battery can be subjected to cascading utilization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this example, 4 batteries (ternary) were subjected to 1C, 0.5C, 0.2C normal temperature cycles respectively, and the capacity and voltage drop within 30 minutes after charging at 0.5C constant current and constant voltage were recorded;

[0026] 1# cell: capacity 1C ≈Capacity 0.5C ≈Capacity 0.2C ; 30 minutes after 0.5C constant current and constant voltage charging, the voltage drop > 0.06V, discarded; dismantling found that the battery core was seriously decomposed of lithium, and the electrolyte was dry;

[0027] 2# cell: capacity 1C ≈Capacity 0.5C ≈Capacity 0.2C ;After charging at 0.5C constant current and constant voltage within 30 minutes, the voltage drop > 0.1V, discarded; after the cycle, the battery cell swelled significantly, dismantling found that the battery cell was seriously decomposed of lithium, the pole pieces turned dark red, and the electrolyte dried up;

[0028] 3# cell: capacity 1C 0.5C 0.2C ; After 0.5C constant current and constant voltag...

Embodiment 2

[0032] In this example, 4 batteries (lithium iron) were subjected to 1C, 0.5C, and 0.2C normal temperature cycles respectively, and the capacity and voltage drop within 30 minutes after charging at 0.5C constant current and constant voltage were recorded;

[0033] 1# cell: capacity 1C ≈Capacity 0.5C ≈Capacity 0 .2C; 0.5C constant-current constant-voltage charging within 30 minutes after the voltage drop > 0.2V, discarded; dismantling found serious lithium deposition in the battery cell, and the electrolyte dried up;

[0034] 2# cell: capacity 1C ≈Capacity 0.5C ≈Capacity 0.2C ; 30 minutes after 0.5C constant current and constant voltage charging, the voltage drop > 0.5V, discarded; after the cycle, the battery cell swelled significantly, dismantling found that the battery cell was seriously decomposed of lithium, the pole pieces turned dark red, and the electrolyte dried up;

[0035] 3# cell: capacity 1C 0.5C 0.2C ; After 0.5C constant current and constant voltage chargin...

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Abstract

The invention discloses a method for quickly judging whether a retired battery can be subjected to cascading utilization. The method includes the following steps: step S1, cycling a battery core to betested at a first multiplying rate for one period at normal temperature, and ensuring that the discharge capacity is a capacity 1; step S2, after standing at the normal temperature for a period of time, cycling the battery core at a second multiplying rate for one period, and ensuring that the discharge capacity is a capacity 2; step S3, after standing at the normal temperature for a period of time, cycling the battery core at a third multiplying rate for one period, and ensuring that the discharge capacity is a capacity 3, wherein the second multiplying rate is greater than the third multiplying rate and less than the first multiplying rate; and step S4, if judging that the capacity 1 is less than the capacity 2 and the capacity 2 is less than the capacity 3, determining that the batterycore is suitable for cascading utilization, and otherwise, determining that the battery core is not suitable for cascading utilization. According to the scheme of the invention, whether the retired battery with a normal appearance can be subjected to cascading utilization is judged through cyclic tests with three different multiplying rates, whether the battery can be subjected to cascading utilization can be quickly and efficiently judged without disassembling the battery, the operation is quick and convenient, the waste can be reduced, and resources can be saved.

Description

technical field [0001] The invention belongs to the field of battery recycling, in particular to a method for quickly judging whether decommissioned batteries can be used step by step. Background technique [0002] As the new energy market continues to boom, the number of electric vehicles in the market continues to increase, and the number of decommissioned power batteries is also growing explosively. The current mainstream technology for lithium battery cascade utilization is as follows: 1. Initially screen the batteries with a capacity lower than 80% according to their appearance, then test their capacity, internal resistance, and voltage, and eliminate cells with abnormal voltage and internal resistance, and conduct a test according to their capacity. 2. Disassemble and recycle batteries with abnormal appearance or low capacity, high internal resistance and low voltage. Although this method can achieve cascade utilization to a certain extent, it cannot quickly judge whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54H01M10/42
CPCH01M10/4221H01M10/4285H01M10/54Y02E60/10Y02W30/84
Inventor 吕荣刘璋勇肖资吴强谷杨
Owner 桑顿新能源科技(长沙)有限公司
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