Electric vehicle safety assessment method and system

Abstract

The invention relates to an electric vehicle safety assessment method and system. The method comprises the following steps: respectively performing safety evaluation on a battery system, a charging system and a power supply system; constructing a safety matrix according to the safety evaluation value of the battery system, the safety evaluation value of the charging system and the safety evaluation value of the power supply system; performing data fusion of the safety evaluation value of the battery system and the safety evaluation value of the charging system according to the safety matrix; and performing data fusion according to the safety matrix, the data fusion result and the safety evaluation value of the power supply system, and determining the safety evaluation value of the electric vehicle. According to the method, integrated safety evaluation of the battery, charging and power supply can be achieved, normalization processing of faults is achieved, and the possibility of safety accidents is restrained from the aspects of the battery of the electric vehicle, charging equipment and a power supply system.

Description

technical field [0001] The invention relates to the field of electric vehicle safety assessment, in particular to an electric vehicle safety assessment method and system. Background technique [0002] In recent years, electric vehicles have achieved rapid development, which has brought about a rapidly growing charging demand for electric vehicles. According to the investigation of electric vehicle fire accidents in China in recent years, it is found that the failures originating from the charging of electric vehicles account for more than 30%. The charging process of electric vehicles has a very direct relationship with the operation status of power batteries, charging equipment and distribution network. The charging process of the battery is coupled with the charging equipment and the operating status of the distribution network. Because a large number of electric vehicles need a large amount of energy from the distribution network to charge, it will inevitably increase th...

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Problems solved by technology

[0003] At present, there are few safety assessments on the integration of battery, charging and power supply at home and abroad. The main reason is that the integrated safety assessment involves multiple fields at the same time. The scale of the researched system is very large, and it is difficult to directly carry out corresponding work.

At present, more domestic and foreign safety assessments are carried out on electric vehicle battery systems, charging equipment, and distribution network power supply systems, and the safety assessment relies on battery management systems or big data cloud platforms. The main safety assessment methods focus on the battery discharge stage. In the charging phase, the battery management system is only responsible for uploading the power, lacking practical safety assessment management

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