The invention discloses an automobile rear collision power-off protection method and system. The method comprises the following steps: the moment T3 when a high-voltage wire harness of an automobile is damaged in rear collision is calculated; the time T4 required by a power-off execution mechanism from obtaining a collision signal to completing the power-off action is calculated; the collision signal is sent out at the moment T5 through a safety air bag controller, wherein T5 is equal to T3 - T4; and when the safety air bag controller monitors that the vehicle body acceleration signal is greater than the acceleration threshold value at the moment T5, a switching-off signal is sent out through the safety air bag controller to make the switching-off execution mechanism execute the switching-off action of the high-voltage wiring harness. The switching execution mechanism can be notified to execute the switching action of the high-voltage wiring harness before the rear collision of the automobile occurs, so the problem that the high-voltage circuit system is not powered off in time is effectively solved, and the safety of the high-voltage circuit system in the rear collision of the automobile is ensured.
本发明公开了一种汽车后部碰撞断电保护方法及系统,该方法包括:计算车辆高压线束在后部碰撞中发生破损的时刻T3;计算切电执行机构从得到碰撞信号至切电动作完成所需的时间T4;通过安全气囊控制器在T5时刻发出碰撞信号,其中,T5=T3‑T4;当安全气囊控制器监测到车身加速度信号大于T5时刻的加速度阈值时,通过安全气囊控制器发出切电信号,以使切电执行机构执行高压线束切电动作。本发明能够在汽车发生后部碰撞前就通知切电执行机构执行高压线束切电动作,有效解决了高压电路系统断电不及时的问题,确保汽车后部碰撞高压电路系统安全性。
Automobile rear collision power-off protection method and system
汽车后部碰撞断电保护方法及系统
2020-07-03
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung |
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