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A screening method for cascade use of waste batteries

A screening method and technology for used batteries, applied in the field of lithium-ion batteries, can solve the problems of lack of clear definitions and methods, inconsistent health status, etc., to achieve the effect of improving economy

Active Publication Date: 2017-01-04
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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  • A screening method for cascade use of waste batteries

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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 of various embodiments of the present invention.

[0045] In a preferred embodiment: an analysis method for echelon utilization of power batteries includes the following steps:

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

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

[0048] (3) Single unit consistency test, connect the remaining N batteries after steps (1) and (2) in series, 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;

[0049] (4) Test battery parameters ...

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Abstract

The invention relates to a screening method for cascaded use of waste batteries, which comprises the following steps: conducting preliminary evaluation of power batteries to be analyzed through appearance identification; testing the self-discharge of battery cells; testing the consistency of the cells; testing battery parameters and grading. By analyzing the characteristics of the decommissioned power batteries of electric vehicles, a screening method suitable for the secondary utilization of power batteries is proposed. This method can give full play to the remaining performance of the decommissioned power batteries of electric vehicles and improve the economy of the secondary utilization of power batteries.

Description

Technical field [0001] The present invention relates to the field of lithium-ion batteries, in particular to a method for gradual use of waste batteries, and in particular to a method for selecting power lithium-ion batteries scrapped after use of electric vehicles. Background technique [0002] Energy and environment have become the most concerned issues in the world. As a large consumer of petroleum resources and polluting the environment, traditional fuel vehicles are constantly being impacted by new clean energy vehicles. Electric vehicles use electricity instead of oil to achieve "zero emissions" 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 begun to be gradually promoted and applied worldwide. A new generation of energy-saving and environmentally-friendly vehicles represented by electric vehicles is an inevitable trend in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42H01M10/54
Inventor 朱广燕刘三兵梅周盛
Owner CHERY AUTOMOBILE CO LTD
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