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Screening method for cascade utilization of waste cells

A waste battery and screening method technology, applied in the field of lithium-ion batteries, can solve problems such as lack of clear definitions and methods, inconsistent health status, etc., and achieve the effect of improving economic efficiency

Active Publication Date: 2015-02-18
CHERY AUTOMOBILE CO LTD
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Problems solved by technology

[0007] To sum up, there are the following technical problems in the existing technology: the power batteries eliminated from electric vehicles have inconsistent health status, and strict screening must be carried out to eliminate a small number of problematic batteries that have been inconsistent with most batteries. Reasonable screening and secondary use can give full play to its value
There is no clear definition and method for the screening of waste power batteries at this stage

Method used

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  • Screening method for cascade utilization of waste cells

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Embodiment Construction

[0044] The present invention will be described in detail below according to the accompanying drawings, which is a preferred embodiment among various implementations of the present invention.

[0045] In a preferred embodiment: an analysis method for cascade utilization of a power battery, comprising the following steps:

[0046] (1) First conduct a preliminary evaluation of the power battery to be analyzed through appearance identification;

[0047] (2) Test the self-discharge of the battery cell;

[0048] (3) Consistency test of the single cell, connect the remaining N batteries in series after steps (1) and (2), after fully charged, discharge to V1*N at a constant current, and calculate the voltage and voltage of each battery V1 difference; continue constant current discharge to V2*N, calculate the difference between each battery voltage and voltage V2; continue constant current discharge to V3*N, calculate the difference between each battery voltage and voltage V3;

[004...

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Abstract

The invention relates to a screening method for cascade utilization of waste cells. The screening method comprises the following steps: preliminary assessment is carried out on power cells to be analyzed through appearance identification; self-discharge of single cells is tested; consistency testing of single cells is carried out; and cell parameters are tested and grading is carried out. By analyzing characteristics of ex-service power cells of an electric vehicle, the screening method for secondary utilization of power cells is brought forward. By the method, surplus performance of ex-service power cells of an electric vehicle can be fully functioned, and economy of secondary utilization of power cells is enhanced.

Description

technical field [0001] The invention relates to the field of lithium-ion batteries, in particular to a screening method for cascaded use of waste batteries, in particular to a screening method for power lithium-ion batteries discarded after use in electric vehicles. Background technique [0002] Energy and the environment have become the most concerned issues in the world. As a major consumer of oil resources and polluting the environment, traditional fuel vehicles are constantly being impacted by new clean energy vehicles. Electric vehicles replace oil with electricity and can achieve "zero emission" and "low noise", which is an important means to solve energy and environmental problems. With the shortage of petroleum resources and the development of battery technology, electric vehicles have gradually been popularized and applied all over the world. It has become a general consensus that the new generation of energy-saving and environment-friendly vehicles represented by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42H01M10/54
CPCH01M10/42H01M10/54H01M2220/20Y02E60/10Y02W30/84
Inventor 朱广燕刘三兵梅周盛
Owner CHERY AUTOMOBILE CO LTD
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