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Method and system for evaluating health state of lithium battery

A technology of health status and lithium battery, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of cumbersome evaluation techniques and long time, and achieve the goal of reducing the cost of the whole life cycle, easy operation, and prolonging the service period. Effect

Pending Publication Date: 2018-12-04
CHINA ELECTRIC POWER RES INST +1
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  • Claims
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Problems solved by technology

[0003] In order to solve the technical problem of cumbersome technical means for evaluating the health status of lithium batteries in the background technology and the technical problems that require a long time, the present invention provides a method for evaluating the health status of lithium batteries, the method comprising:

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  • Method and system for evaluating health state of lithium battery
  • Method and system for evaluating health state of lithium battery

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Embodiment Construction

[0057] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0058] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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Abstract

The invention provides a method and a system for evaluating the health state of a lithium battery. The method comprises steps: open circuit voltage of the lithium battery is measured; according to theopen circuit voltage and in combination of upper and lower limit values of working voltage of different types of batteries and constant current charging / discharging time, the remaining capacity of the battery is calculated; and finally, according to the ratio of the remaining capacity of the battery to a nominal capacity, the health state of the battery is determined, and the larger the ratio is,the better the health state is. According to the method and the system for evaluating the health state of the lithium battery, the operation is simple and convenient, the speed is fast, scientific basis is provided for screening and grading combination of batteries in service, the service life of the lithium battery can be effectively prolonged, the whole life cycle cost of the lithium battery isreduced, and the effectiveness and the rationality of resource utilization are improved.

Description

technical field [0001] The present invention relates to the field of cascaded utilization of lithium batteries, and more particularly, to a method and system for evaluating the health status of lithium batteries. Background technique [0002] In the field of cascade utilization of decommissioned lithium batteries, the following two problems need to be solved: first, whether decommissioned lithium batteries can be used in cascade utilization; to evaluate. At present, a large number of lithium batteries in China are facing decommissioning. The huge pressure on environmental protection and asset disposal makes the cascade utilization of decommissioned lithium batteries an urgent technical problem that needs to be solved. From the perspective of application, the most important thing to solve is the adaptability of lithium battery status and application scenarios. By selecting suitable application scenarios for lithium batteries in different states, the stress in the cascade uti...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
Inventor 王凯丰杨凯范茂松张明杰高飞刘皓耿萌萌王康康
Owner CHINA ELECTRIC POWER RES INST
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