Power station thermal runaway early warning method and system based on safety characteristic parameter characterization system

Abstract

The invention discloses a power station thermal runaway early warning method and system based on a safety characteristic parameter representation system, and belongs to the technical field of power station thermal runaway early warning. An existing thermal runaway risk early warning method is mainly based on a temperature threshold value or a temperature change rate threshold value, however, when the temperature threshold value and the temperature change rate threshold value are out of limit, thermal runaway is basically inevitable, and loss is difficult to retrieve. According to the power station thermal runaway early warning method based on the safety characteristic parameter characterization system, a correlation coefficient model, an information entropy model and a dimensionless characteristic parameter model are constructed, the safety characteristic parameter characterization system is formed, and then safety characteristic parameter values can be calculated according to single voltage data in the actual operation working condition; and the calculated safety characteristic parameter values are utilized to judge the serial numbers of the outlier batteries through a union set taking method, so that early diagnosis and early warning of the thermal runaway risk of the energy storage battery system are realized, thermal runaway can be effectively avoided, the use safety of the batteries can be ensured, the user experience is good, and popularization and use are facilitated.

Description

technical field [0001] The invention relates to a power station thermal runaway early warning method and system based on a safety feature parameter characterization system, and belongs to the technical field of power station thermal runaway early warning. Background technique [0002] Battery energy storage technology is one of the most promising technologies in the field of energy storage, but safety issues have always been the main challenge for its large-scale promotion and application. [0003] In practical applications, when the energy storage battery encounters mechanical abuse, electrical abuse and thermal abuse, the battery material is damaged and abnormal heat generation occurs. The continuous accumulation of heat intensifies the internal exothermic chemical reaction, forming a positive feedback, and eventually causing thermal runaway. . At present, the research on battery thermal runaway experiments is limited to power batteries, and there is a lack of research on...

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Problems solved by technology

[0005] However, the above schemes and other existing methods for early warning of thermal runaway risk are mainly based on temperature threshold or temperature change rate threshold, but when the two exceed the limit, thermal runaway is basically inevitable and the loss is irreparable. Therefore, such schemes, There are great limitations and poor user experience, which is not conducive to promotion and use

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