Power-on and power-down control method and device, and vehicle

Abstract

The disclosure relates to a power-on and power-down control method and device, and a vehicle. The vehicle has a running power-on and power-down mode and a charging power-on and power-down mode. Firstly, when the vehicle is in a low voltage power-on state, the current power-on and power-down mode of the vehicle is determined, and then the current power-on and power-down mode of the vehicle is switched to the other power-on and power-down mode according to the connection state of a charging line and a charging interface, the state of a key, and the high voltage connection state. Therefore, by using the power-on and power-down control method, the running power-on and power-down mode and the charging power-on and power-down mode of the vehicle are combined, after the current power-on and power-down mode of the vehicle is determined, a more reasonable mode switching sequence is set by comprehensively considering the connection state of the charging line and the charging interface, the stateof the key, and the high voltage connection state, so that reasonable switching between the running power-on and power-down mode and the charging power-on and power-down mode of the vehicle is achieved, invalid switching between the running and charging modes of the vehicle is avoided, and the mode switching efficiency of the vehicle and the high voltage safety of the vehicle are enhanced.

Description

technical field [0001] The present disclosure relates to the technical field of vehicles, and in particular, to a method and device for controlling power on and off, and a vehicle. Background technique [0002] With the development of the economy and the rapid growth of car ownership, the energy crisis of fossil fuels is becoming more and more prominent, and the environmental pollution problems brought about by it are also becoming more and more serious. In order to solve energy and pollution problems, countries around the world are vigorously promoting electric vehicles. Compared with traditional vehicles, electric vehicles have a set of high-voltage drive systems (including power batteries, drive motors and high-voltage distribution boxes, etc.) and a set of high-voltage accessories (DCDC, PTC and air conditioning compressor, etc.), where DCDC is a DC-DC converter, and PTC is an electric heater. Among them, the electric vehicle high-voltage drive system and high-voltage a...

AI Technical Summary

Problems solved by technology

[0003] There are sudden changes in high voltage and high current during the power-on and power-off process of the high-voltage system of electric vehicles. It will cause the high-voltage contacts to stick together and fail to cut off the high-voltage accident, resulting in reduced reliability and shortened life of the high-voltage system

Images