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Early warning method and analysis method for performance degradation of lithium ion battery system

A technology for lithium-ion batteries and system performance, which is applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., and can solve problems such as failure to effectively maintain life and safety accidents.

Pending Publication Date: 2022-04-22
TIANJIN ENERGIES
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  • Abstract
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Problems solved by technology

But when most of the batteries have entered a period of rapid decay, even if the battery with an obviously outlier voltage is replaced, the life cannot be effectively maintained, and a safety accident may even occur if it is used further

Method used

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  • Early warning method and analysis method for performance degradation of lithium ion battery system
  • Early warning method and analysis method for performance degradation of lithium ion battery system
  • Early warning method and analysis method for performance degradation of lithium ion battery system

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Embodiment Construction

[0044] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0045] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood ...

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Abstract

The invention provides an early warning method and an analysis method for performance degradation of a lithium ion battery system, and the method comprises the steps: carrying out the early warning of the performance degradation of the battery system through collecting and processing a numerical value of the battery system; provided is an electrical connection analysis method. According to the early warning method and the analysis method for the performance degradation of the lithium ion battery system, the full-cycle operation condition of the battery system can be comprehensively known, the rapid degradation period can be timely identified, and early warning can be timely performed, so that a worker can adjust a BMS strategy according to the actual condition of the battery, and the charging current and voltage can be reduced; or the whole pack of batteries are replaced, and the replaced batteries are utilized in an echelon mode; and the products which cannot be utilized in an echelon manner are scrapped, so that safety accidents are avoided.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to an early warning method and an analysis method for performance degradation of a lithium-ion battery system. Background technique [0002] At present, more and more users travel by electric vehicles. Electric vehicles use car batteries as power sources, and centrally manage and control the operation of car batteries through BMS (Battery Management System, battery management system). In order to ensure the normal operation of the BMS system, it is necessary to collect battery data such as current, voltage, temperature, and battery fault signals of the car battery at high frequency, and the battery data server analyzes the performance of the car battery based on the battery data. With this data, individual cells with significantly lower or higher voltages can be identified. However, when most of the batteries have entered a period of rapid decay, even if ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/367G01R31/378G01R31/389
CPCG01R31/367G01R31/378G01R31/389
Inventor 张越超纵雪楠韩兵兵高秀玲
Owner TIANJIN ENERGIES
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