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Electric vehicle charging safety early warning method

An electric vehicle and safety warning technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as difficulties in online monitoring of real vehicle data, and achieve the effect of ensuring rapid safety.

Pending Publication Date: 2021-12-10
国网江西省电力有限公司供电服务管理中心 +1
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  • Application Information

AI Technical Summary

Problems solved by technology

The biggest shortcoming of the current battery health state estimation method is that it is difficult to apply to real vehicle data online monitoring, so how to apply scientific research results to real vehicle monitoring is particularly important

Method used

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Embodiment Construction

[0045] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0046] Such as figure 1 As shown, a method for early warning of electric vehicle charging safety, comprising:

[0047] 1. Analysis of the consistency and performance degradation of electric vehicle battery packs, and the coupling mechanism of safety features

[0048] In the production process, due to technical problems and uneven materials, there are slight differences in the activation degree and thickness of the active material of the battery plates, resulting in the same model of batteries shipped from the same batch. The material is not exactly the same, so the capacity, internal resistance, etc. are not exactly the same.

[0049]During use, due to the differences in the electrolyte density, temperature and ventilation conditions, self-discharge degree, discharge depth, and charge-discharge process of each battery in the battery pack, the dec...

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Abstract

The invention discloses an electric vehicle charging safety early warning method. The method analyzes the consistency, performance degradation and safety characteristic coupling mechanism of a battery pack of an electric vehicle, and deduces the SOC consistency development rule of the battery pack; in order to further play the battery performance to the greatest extent and guarantee the safety of the battery pack, the safety state monitoring method of the battery pack is studied; in order to solve the multicollinearity problem in the power battery pack, the capacity of the lithium ion battery is estimated through principal component regression PCR, then regression is conducted on data through a multiple linear regression method, the result is compared with the result of the health state estimation model based on principal component regression, and finally, for short-term potential safety hazards, an outlier detection method is adopted to quickly and accurately detect an abnormal battery and give an early warning, and for long-term potential safety hazards, a power battery medium-and-long-term accelerated decline identification method is adopted to give an early warning. The method provides reference for safe charging of the electric vehicle.

Description

technical field [0001] The invention relates to a method for early warning of electric vehicle charging safety, belonging to the technical field of electric vehicle charging safety. Background technique [0002] In order to reduce carbon emissions, reduce the threat of fossil energy consumption to national energy security, and alleviate environmental crises, it has become a global consensus to accelerate the development and promotion of new energy vehicles. New energy vehicles and rail transit vehicles have been included in my country's seven strategic emerging industries . As a key technology of new energy vehicles, power batteries and their applications are the technological commanding heights that countries are competing to occupy, and are crucial to independently breaking through the technical bottleneck of new energy vehicles. Power battery, as one of the key technologies of new energy vehicles, is the technical bottleneck of its development. Through the efforts of var...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/392G01R31/396G01R31/389G01R31/367
CPCG01R31/392G01R31/396G01R31/389G01R31/367
Inventor 范亚军杨爱超樊友杰邓礼敏裴茂林王毅胡琛李敏吴宇
Owner 国网江西省电力有限公司供电服务管理中心
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