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A method and system for predicting the life of a lithium-supplemented battery stage

A battery and lithium supplement technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., to achieve the effects of strong phases, resource saving, and high reliability

Active Publication Date: 2022-03-04
CHINA ELECTRIC POWER RES INST
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Problems solved by technology

[0006] The technical solution of the present invention provides a method and system for predicting the life of a lithium-supplemented battery in order to solve the problem of how to predict the life of a lithium-supplemented battery

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  • A method and system for predicting the life of a lithium-supplemented battery stage

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Embodiment Construction

[0038] 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.

[0039] 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 discloses a method and a system for predicting the stage life of a lithium-supplemented battery. In a constant temperature environment, after the lithium-supplemented battery is left standing for a preset time, the lithium-supplemented battery is charged with a constant current; the lithium-supplemented battery is charged with a constant current. Constant current discharge; charging steps and discharging steps for multiple cycles of lithium-supplemented batteries; according to charging steps and discharging steps for multiple cycles of lithium-supplemented batteries, take the predetermined number of cycles for differential processing, and obtain the differential of the predetermined number of cycles Capacitance curve; according to the differential capacitance curve of the predetermined cycle number, establish the curve of the potential difference and the number of cycles; obtain the relationship between the potential difference and the number of cycles; establish the curve of the differential capacitance corresponding to the potential difference and the number of cycles; obtain the potential difference and the capacitance The relational expression; set the attenuated capacitance, according to the obtained potential difference corresponding to the attenuated capacitance and the relationship between the potential difference corresponding to the attenuated capacitance and the number of cycles, to obtain the number of cycles of the lithium-supplementing battery, which is completed Lifetime prediction at this stage.

Description

technical field [0001] The present invention relates to the technical field of lithium-ion batteries, and more specifically, to a method and system for predicting the lifetime of a lithium-supplementing battery. Background technique [0002] Lithium-ion batteries are widely used in 3C products and other fields due to their advantages such as high specific energy. With the improvement of people's living standards, fuel vehicles have gradually entered every household, followed by aggravated air pollution, while people's requirements for the environment have become higher and higher, and electric vehicles have gradually entered people's field of vision. Due to the demand for battery life of electric vehicles, various batteries with long life and high specific energy have been gradually developed, and lithium-ion batteries are developing towards ideal applications. [0003] Cycle life is an important indicator of the performance of lithium-ion batteries, but with the developmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/367G01R31/392
Inventor 耿萌萌杨凯张明杰范茂松高飞刘皓王康康王凯丰
Owner CHINA ELECTRIC POWER RES INST
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