Power-off protection device and protection method after electric vehicle collision

Abstract

The invention relates to a power-off protection device and protection method after collision of an electric automobile. The power-off protection device comprises a master control unit, an electrical control switch, automobile body pressure sensors installed on an automobile body of the electric automobile and energy storage unit pressure sensors installed on an energy storage unit of the electric automobile, the electric control switch is in series connection at the high voltage output end of the inner side of a box body of the energy storage unit of the electric automobile, the control end of the electric control switch is connected with the output end of the master control unit, and the automobile body pressure sensors and the energy storage unit pressure sensors are connected with the master control unit. A power-off protection method comprises the steps that the automobile body pressure sensors and the energy storage unit pressure sensors detect pressure in real time and transmit the pressure to the master control unit, when the pressure value received by the master control unit exceeds the limit, it is judged that the collision happens to the electric automobile, the master control unit sends out a control signal to break the electric control switch, and the high voltage output of the energy storage unit of the electric automobile is switched off. By means of the power-off protection device and the protection method, hazards such as short circuit, fire and explosion after the collision happens to the electric automobile are avoided, and the safety performance is effectively improved.

Description

technical field [0001] The invention relates to an electric vehicle, in particular to a power-off protection device and a protection method for an electric vehicle after collision. Background technique [0002] At present, the number of severe weather conditions such as the greenhouse effect and smog is increasing day by day, seriously affecting people's normal life. Electric vehicles replace oil with electricity and realize zero emissions in the true sense. Its appearance will improve the weather and the environment. It has been greatly improved, but the safety of electric vehicles, especially the safety of power batteries, has always been an insurmountable problem. When an electric vehicle collides, the power battery will inevitably be under tremendous pressure, but at this time the power battery still outputs electric energy, which will easily cause the power battery to short circuit, catch fire, or even explode. Security risks. Contents of the invention [0003] The ...

AI Technical Summary

Problems solved by technology

[0003] The invention mainly solves the technical problem that when the electric vehicle collides, the power battery still outputs electric energy, which will easily cause the power battery to short-circuit, catch fire, or even explode and other high-voltage dangers, and there is a great potential safety hazard; it provides a A power-off protection device and protection method for an electric vehicle after a collision. When the electric vehicle collides, it can automatically cut off the high-voltage output of the power battery, thereby avoiding short-circuit, fire, explosion and other dangers, and effectively improving the safety performance of the electric vehicle. , to ensure the safety of pedestrians

Images