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A usability evaluation method for decommissioned power lithium batteries

An evaluation method and technology for lithium batteries, which are used in the repair/maintenance of secondary batteries, measurement of electricity, measurement of electrical variables, etc. The results are scientific and reliable, the sorting efficiency is improved, and the measurement parameters are less.

Active Publication Date: 2017-01-25
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the above sorting methods for cascade utilization of decommissioned batteries require a series of complicated steps to screen out batteries that can be used in cascade use. However, the number of decommissioned power batteries in the future is very large, and the sorting process based on the method of the above invention patent is lengthy and complicated. Large, low sorting efficiency

Method used

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  • A usability evaluation method for decommissioned power lithium batteries
  • A usability evaluation method for decommissioned power lithium batteries
  • A usability evaluation method for decommissioned power lithium batteries

Examples

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Embodiment 1

[0025] A method for evaluating the usability of a decommissioned power single lithium battery, comprising the steps of:

[0026] (1) The decommissioned battery is a square soft-packed lithium iron phosphate power battery produced by a company and decommissioned from an electric bus. The cell has a nominal capacity of 20Ah, a platform voltage of 3.2V, and a charging and discharging range of 2.80~3.65V. The battery matching method is as follows: first, 10 square soft-packed lithium iron phosphate cells are connected in parallel to form a 200Ah battery module, and then a 400Ah / 576V lithium iron phosphate power battery pack is composed of 2 parallel 180 series, which is coordinated with a three-phase asynchronous motor drive system. The vehicle provides power. These batteries have been running for 3 years since they were put into operation in 2010, with a running mileage of 140,000 km. The battery pack operates entirely in charging mode. In this embodiment, a total of 320 200Ah...

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Abstract

The invention relates to an availability evaluation method on retired dynamic lithium battery. The method comprises the following steps: establishing core parameters for judging the availability of a retired dynamic single lithium battery; establishing the core parameter criteria of the retired dynamic single lithium battery; and establishing the proportion of the core parameter criteria of the retired dynamic single lithium battery; wherein the core parameters comprise residual battery capacity, safety, and cycle performance, the core parameter criteria comprise battery state of health (SOH), battery internal resistance, diaphragm penetration strength decreasing rate, diaphragm porosity, and secondary cycle life, and the diaphragm penetration strength decreasing rate and diaphragm porosity can be used to measure the diaphragm performance. The evaluation method has the advantages of less measurement parameters, simple and high efficient measuring method, and scientific and reliable evaluation result, and is capable of greatly improving the efficiency of screening on retired dynamic lithium batteries.

Description

technical field [0001] The invention belongs to the technical field of storage batteries, and in particular relates to a method for evaluating the usability of decommissioned power single lithium batteries. Background technique [0002] Electric vehicles have high requirements on the performance of the power battery. When the capacity of the power battery drops to a certain level, in order to ensure the power performance, driving range and safety performance of the electric vehicle, it must be replaced. The battery replaced from the electric vehicle still has a high residual capacity. Lithium-ion batteries have the advantages of high specific energy, good high-temperature characteristics, and long cycle life. After being decommissioned as electric vehicle power batteries, they may be used in relatively good working conditions and relatively low requirements for battery performance after screening and regrouping. In some cases, the cascade utilization of power batteries can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42
CPCG01R31/385G01R31/392
Inventor 赵光金吴文龙
Owner STATE GRID CORP OF CHINA
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