Pure electric vehicle power off control method and system

Abstract

The invention provides an electric control method and system under the whole-vehicle fault of a blade electric vehicle. The blade electric vehicle comprises a whole-vehicle controller, a motor controller and a battery management system. The method includes the steps of after high-voltage powering of the whole vehicle, detecting whether the vehicle has a fault or not, if yes, judging the grade of the fault, and controlling the vehicle to enter a corresponding power-off mode according to the grade of the fault. A reasonable power-off processing mechanism can be adopted for faults of different grades, the reliability and safety of the power-off process of the blade electric vehicle are improved, driving safety is improved, and meanwhile troubleshooting is convenient.

Description

technical field [0001] The invention relates to the field of new energy technologies, in particular to a method and system for controlling power-off of a pure electric vehicle when the vehicle fails. Background technique [0002] The energy crisis and environmental pollution have made traditional vehicles face increasingly serious challenges. New energy vehicles have become the current and future development trend, and pure electric vehicles occupy an important position in new energy vehicles. Due to the short development time of pure electric vehicles, the technology is not mature enough, the accumulated design experience is insufficient, and there is no unified design specification, resulting in the design methods adopted by different vehicles are very different, and the fault handling mechanism is not perfect enough. The power supply battery used by pure electric vehicles The voltage is relatively high, generally above 300V. If a fault that endangers personal and vehicle ...

AI Technical Summary

Problems solved by technology

Due to the short development time of pure electric vehicles, the technology is not mature enough, the accumulated design experience is insufficient, and there is no unified design specification, resulting in the design methods adopted by different vehicles are very different, and the fault handling mechanism is not perfect enough. The power supply battery used in pure electric vehicles The voltage is relatively high, generally above 300V. If a fault that endangers personal and vehicle safety occurs and the correct handling mechanism is not adopted, it will pose a great risk to the vehicle and personal safety.

[0003] The current pure electric vehicles do not have a complete mechanism for dealing with failures, and do not carry out targeted treatment for failures of different hazard levels. , Sometimes after a minor fault occurs, the high-voltage power is frequently disconnected to cause trouble to the driver. Therefore, the reliability and safety of the power-off process cannot be guaranteed, so that driving safety cannot be guaranteed, and it is also not conducive to technical maintenance after a fault occurs. personnel to check

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