Monitoring method of vehicle control unit of battery electric vehicle

Abstract

The invention aims at providing a monitoring method of a vehicle control unit of a battery electric vehicle. The monitoring method aims at raising a safety level of the vehicle control unit. The monitoring method of the vehicle control unit of the battery electric vehicle comprises the steps of monitoring primary torque, monitoring secondary torque, monitoring a program flow, monitoring an instruction set, monitoring a memory, and checking a turn-off path, AD (Analog to Digital) conversion and a restarting function. The monitoring method divides vehicle control software into multiple hierarchies to achieve a safety requirement with a higher level, increases an operating safety factor of the vehicle, and comprises three aspects of correctly collecting requirement torque of a driver, correctly analyzing the requirement torque of the driver and correctly executing request torque of the driver. The safety level of the monitoring method can reach an ASILD (Automotive Safety Integrity Level D) under the condition that the vehicle is controlled without abnormal acceleration according to ISO 26262.

Description

technical field [0001] The invention belongs to the field of complete vehicle safety control of pure electric vehicles, and in particular relates to a safety monitoring method for a complete vehicle controller. Background technique [0002] The high oil price has led to the development of pure electric vehicles entering the stage of speed-up. In the context of the current rapid development of power battery technology, the realization of high-speed pure electric vehicles has entered a stage of substantial progress. If electric vehicles want to replace the dominance of traditional internal combustion locomotives, they must develop in the direction of high speed and high cruising range. [0003] As we all know, the higher the vehicle speed, the higher the safety level requirements for the vehicle controller. At present, the safety monitoring of most pure electric vehicles in China is still in its infancy. The single-chip control structure limits the development and implementat...

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Problems solved by technology

[0003] As we all know, the higher the vehicle speed, the higher the safety level requirements for the vehicle controller. At present, the safety monitoring of most pure electric vehicles in China is still in its infancy. The single-chip control structure limits the development and implementation of electric vehicle safety monitoring. Torque safety is precisely one of the core technologies necessary for electric vehicle control in the future. According to the ISO26262 standard, a single chip cannot meet the safety level of ASILD

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