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Echelon utilization lithium battery performance evaluation method

An evaluation method and lithium battery technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as differences in effective capacity of batteries

Active Publication Date: 2017-02-08
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the effective capacity of each single battery in a decommissioned lithium battery pack is different. To achieve a reasonable cascade utilization, it is necessary to re-evaluate its SOH (state of health of the lithium battery) and performance to determine its applicable gradient range

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  • Echelon utilization lithium battery performance evaluation method
  • Echelon utilization lithium battery performance evaluation method
  • Echelon utilization lithium battery performance evaluation method

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Embodiment Construction

[0046] The performance evaluation test of the cascade utilization of lithium batteries needs to be carried out under the premise of ensuring the safety of the decommissioned lithium battery pack, under a limited test time and a complicated external environment. The present invention considers the worst case (historical data and important data, etc. unknown) and Under actual engineering requirements, the design is suitable for the test conditions of cascaded use of lithium batteries. Based on the necessary measurement data (charge and discharge voltage, charge and discharge current, and operating temperature) of single batteries obtained in real time, the method for extracting the health characteristics of lithium batteries is studied and used This makes a reasonable performance evaluation, and a detailed analysis will be carried out below.

[0047] 1. Limited test time

[0048] In the dynamic internal resistance test, the lithium battery is first fully charged in CCCV mode, and the...

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Abstract

The invention discloses an echelon utilization lithium battery performance evaluation method which can be applied to echelon recycling of lithium batteries. The echelon utilization lithium battery performance evaluation method comprises the steps of designing performance test condition of a lithium battery, that is, designing the test time, determining the initial SOC state and designing the discharge intermittent time; extracting health feature data of the lithium battery according to the designed test conditions; then performing SOH estimation based on a health state decision-making method of a multi-health life model data fusion technology; and finally dividing an echelon utilization range of the lithium battery. The echelon utilization lithium battery performance evaluation method can be applied to echelon recycling of the lithium battery, not only can enable the performance of the lithium battery to be given into full play so as to be conducive to energy conservation and emission reduction, but also can relieve pressure brought for the recycling work by a circumstance that a great number of lithium batteries get into a recycling stage.

Description

Technical field [0001] The invention relates to the field of lithium batteries, in particular to a method for evaluating the performance of lithium batteries in cascade utilization, which is applied to the recycling and reuse of lithium batteries in cascades. Background technique [0002] Lithium-ion batteries (referred to as lithium batteries) have gradually replaced lead-acid, nickel-metal hydride, nickel-cadmium and other batteries with their advantages of light weight, small size, long life, high voltage, and no pollution, becoming the first choice for electric vehicle power batteries. When the charging capacity of the car's lithium battery pack is reduced to about 80% of the original capacity, it is no longer suitable for continued use in electric vehicles. If these lithium battery packs are scrapped for recycling, the failure to achieve the best use of materials will cause Great waste of resources. When the appearance of the lithium battery is intact, there is no damage, a...

Claims

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Application Information

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IPC IPC(8): G01R31/36
CPCG01R31/3648G01R31/392
Inventor 孙冬许爽顾冬华吴青娥韩振宇王俊杰杨立
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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