Collision prevention method and device for electric vehicle
A technology for collision protection and electric vehicles, applied in the field of vehicles, can solve the problems of long response time and low vehicle safety, and achieve the effect of reducing the risk of fire, shortening the response time, and improving safety
Active Publication Date: 2019-04-16
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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Problems solved by technology
[0005] In view of the above-mentioned problems in the prior art, the object of the present invention is to provide a collision protection method and device for an electric vehicle to solve the problem that the response time from the collision accident of the electric vehicle to the disconnection of the high-voltage power supply is too long and the safety of the vehicle is relatively long. low problem
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[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0046] In the event of a traditional electric vehicle collision accident, the PMW square wave signal formed by quickly switching the voltage of the peripheral square wave detection point between high and low levels based on the high-speed on-off of the mos tube inside the airbag controller is generally used as the collision output Signals are used to realize actions such as fuel cut-off, power cut-off, and door unlocking. The square wave signal is a square wav...
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The invention relates to a collision protection method and a device for the electric vehicle. The collision protection method includes the following steps that a pulse signal of start current used forstarting a safety bag is obtained; according to the pulse signal of the start current, a power-off instruction is generated; the power-off instruction is sent to a high-voltage power supply unit to make the high-voltage power supply unit to cut off the output of high voltage electricity. The method and the device can largely shorten the response time from the occurrence of a collision accident tothe disconnection of high voltage electricity, the risk of fire caused by the short circuit of a high voltage power supply and other faults after the collision of vehicles is reduced, and the safetyof the vehicle is improved.
Description
technical field [0001] The invention relates to the technical field of vehicles, in particular to a collision protection method and device for an electric vehicle. Background technique [0002] With the gradual popularization of electric vehicles such as pure electric vehicles and hybrid vehicles, the safety requirements for electric vehicles are getting higher and higher. Electric vehicles provide forward power to vehicles through high-voltage power supply systems equipped with large-capacity battery packs. In the event of a collision accident, the vehicle will bear a huge impact. At this time, it is easy to cause a short-circuit fault in the high-voltage power supply system, which will cause life-threatening injuries to the driver and passengers. [0003] In view of possible harm caused by a short circuit of the high-voltage power supply system during a collision accident, the prior art generally disconnects the high-voltage output of the high-voltage power supply to imple...
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IPC IPC(8): B60L3/00
CPCB60L3/0007
Inventor 芦冰
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD