Full vehicle power supply control system and method

Abstract

The invention discloses a full vehicle power supply control system and method, and belongs to the technical field of automobiles. The full vehicle power supply control system comprises a relay, a master control chip, an electrical load and a safety airbag controller; the relay is connected between a full vehicle power supply and the electrical load; one end of the master control chip is connected with the safety airbag controller, and the other end of the master control chip is connected with the relay; the safety airbag controller is used for collecting vehicle collision information and calculating impact force produced when a vehicle collides according to the vehicle collision information, and a vehicle collision signal is sent to the master control chip when the impact force is greater than a set value, so that a main contact of the relay is disconnected under the control of the master control chip, and the full vehicle power supply is disconnected from the electrical load. The full vehicle power supply control system and method achieve high working reliability and high response speed; after the vehicle collides seriously, the power supply can be turned off timely, and therefore fire disasters and other safety accidents are avoided.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a vehicle power supply control system and method. Background technique [0002] With the development of science and technology, more and more electrical appliances are used in automobiles, and the electrical system of automobiles is becoming more and more complex. Safety accidents caused by automobile circuit failures are often reported in the newspapers, and a large part of these accidents are due to failure to cut off in time Caused by the vehicle power supply. Therefore, it is necessary to control the power supply of the whole vehicle to prevent the occurrence of safety accidents. [0003] In the prior art, automotive circuits are usually passively protected by fuses. When circuit failures such as short circuit and overload occur, the fuse will blow and cut off the connection between the vehicle power supply and the faulty circuit, thereby avoiding fire, vehicle burning,...

AI Technical Summary

Problems solved by technology

Fuel leakage, circuit damage and other problems are likely to be caused by vehicle collisions. At this time, if the circuit has not yet experienced short circuit, overload, etc., causing the current to reach the fusing current of the fuse, the fuse will not be reliably fused, so that the power supply of the vehicle cannot be cut off. It is easy to cause a fire; in addition, even if the current reaches the fuse melting current, because the fuse melting speed is slow, and the high current is easy to cause sparks, it is still easy to cause a fire, and it will also cause a vicious accident of car crash

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