High-low voltage power-off time sequence control method, device and system of new energy vehicle

Abstract

The invention discloses a high-low voltage power-off time sequence control method, device and system for a new energy vehicle, a medium and equipment. The control method comprises a safe power-off control method in a parking state and a safe control method in a vehicle running state. The safe power-off control method in the parking state comprises the steps of outputting a power-off signal to a low-voltage power distribution system if the state change of a high-voltage power-on feedback signal is detected; after detecting the signal change of the low-voltage control switch, executing low-voltage power-off; if it is detected that the low-voltage control switch signal changes and the high-voltage power-on feedback signal does not change, a high-voltage power-off execution signal is output, the high-voltage power distribution system is controlled to be powered off, and when it is detected that the state of the high-voltage power-on feedback signal changes, a power-off signal is output to the low-voltage power distribution system to disconnect the low-voltage power distribution system. The method has the advantages of high safety and reliability.

Description

technical field [0001] The present invention mainly relates to the field of new energy technologies, and in particular to a method, device and system for controlling high and low voltage power-off sequence of new energy vehicles. Background technique [0002] Under the pressure of energy and environmental protection, new energy vehicles will undoubtedly become the direction of future vehicle development. In order to ensure the safe and reliable driving of new energy vehicles, the high and low voltage power-off sequence control and safety protection of vehicles are particularly important. The existing high and low voltage power-off principles are as follows: figure 1 shown. If the vehicle is parked, the high voltage must be disconnected first, and then the low voltage must be disconnected. If the low-voltage control switch DK is pressed first to cut off the power, the high-voltage electrical equipment will be cut off with load, which will easily damage the electrical equip...

AI Technical Summary

Problems solved by technology

If the high-voltage control switch GK or the low-voltage control switch DK is pressed to cut off the power, when the vehicle loses power, the electrical systems such as braking and steering will stop working, and the vehicle will be out of control, posing major and serious safety hazards

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