Transportation vehicle safety control method and system with power supply system

Abstract

The invention provides a transportation vehicle safety control method and system with a power supply system. The power supply system is divided to a first-level power supply system and a second-level power supply system. While an accident which is going to happen is pre-judged by a first safety diagnose module, the power source of the second-level power supply system is cut off and a capacitor is discharged, and the emergency braking operation is triggered; after the accident happens, a second safety diagnose module is used for diagnosing the severity degree of the accident, and according to a diagnose result, selectively adopting the following operations: recovering the power supply of the second-level power supply system, controlling the output power of the first-level power supply system and triggering safety belt pre-tightening operation, or cutting off the first-level power supply system and discharging the capacitor and triggering a safety airbag. The dynamic property of the transportation vehicle can be kept during the slight impact and medium impact, and the transportation vehicle can leave the dangerous area as soon as possible; the whole power supply system can be effectively cut off during the serious impact so that the electric shock is avoided; and layout requirements for the second-level power supply system are reduced, and the freedom degree of the layout is increased.

Description

technical field [0001] The invention relates to a vehicle safety control method and system, in particular to a method and system for hierarchically controlling the power supply system of a vehicle with a power supply system under collision conditions. Background technique [0002] In recent years, with the increasing number of electric vehicles, their safety issues, especially the safety issues of high-voltage systems, have also attracted more and more attention from the government, consumers and automobile manufacturers. There are frequent reports of electric vehicles catching fire and exploding after collisions. On October 1, 2015, my country officially began to implement GB / T31498 "Safety Requirements for Electric Vehicles After Collision", which made detailed requirements for the safety of high-voltage systems after collisions, and raised the threshold for market access of electric vehicles. During the use of electric vehicles, the occurrence of collision accidents is m...

AI Technical Summary

Problems solved by technology

The existing technologies mainly focus on controlling the high-voltage system by cutting off the power supply of the entire high-voltage circuit. Although these technologies can reduce the safety risk after a collision to a certain extent, however, because these technologies do not differentiate the operation of the high-voltage system, they cannot Meet the rising demands of automotive safety

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