Collision power-off protection system of electromobile

Abstract

The invention relates to the technical field of electromobiles, in particular to a collision power-off protection system of an electromobile. The system comprises a battery management unit, a power battery pack, a finished automobile control unit, an airbag controller, an automobile body collision sensor and an automobile body controller, wherein the battery management unit, the finished automobile control unit, the airbag controller and the automobile body controller are connected via a CAN (Controller Area Network) bus; the airbag controller is further connected with the battery management unit and the automobile body controller via wires; the airbag controller is connected with the automobile body collision sensor via a wire; and the battery management unit is connected with the power battery pack via a wire. The battery management unit, the finished automobile control unit and the automobile body controller of the system can simultaneously receive three types of signals emitted by an airbag, i.e., a CAN signal, a wire current signal and a radio signal. When any signal is received, the control units related to collision can implement passive safety protection measures of a vehicle, and the collision power-off reliability and stability are improved.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an electric vehicle collision power-off protection system. Background technique [0002] How to improve the safety of electric vehicles is an urgent problem to be solved in the promotion of electric vehicles. The "Safety Requirements After Electric Vehicle Collision" submitted for approval also put forward stricter requirements on the reliability and stability of electric vehicle collision safety. In the collision power-off protection system of electric vehicles, the battery management unit and other vehicle control units only receive the CAN signal sent by the airbag, and often during the collision process due to the damage or excessive length of the CAN bus of the vehicle, the battery management system will The battery management unit and other vehicle control units cannot normally execute relevant safety protection strategies, resulting in casualties. Contents of ...

AI Technical Summary

Problems solved by technology

In the collision power-off protection system of electric vehicles, the battery management unit and other vehicle control units only receive the CAN signal sent by the airbag, and often during the collision process due to the damage or excessive length of the CAN bus of the vehicle, the battery management system will The battery management unit and other vehicle control units cannot normally execute relevant safety protection strategies, resulting in casualties

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