Electric vehicle antitheft device and method

Abstract

The invention discloses an electric vehicle antitheft device which comprises a relay coil and two relay normally-closed contacts connected with the relay coil. The relay coil is in parallel connection with a storage battery of an electric vehicle. The two voltage type relay normally-closed contacts are connected between A and B phases and between B and C phases of a three-phase winding of a stator of a brushless direct current motor of the electric vehicle respectively. An anti-theft battery and a sound warning device do not need to be added to the device additionally, and the electric vehicle antitheft device is simple in structure and low in cost and can still achieve antitheft even if the storage battery is stolen. The invention further discloses a method for applying the electric vehicle antitheft device. The method comprises the steps that when a connected line of the storage battery is cut off, the relay coil is subjected to power down, the two voltage type relay normally-closed contacts are in a closed state, the three-phase winding of the stator of the brushless direct current motor is short-circuited through the two relay normally-closed contacts, a rotor of the brushless direct current motor cannot rotate, and wheels of the electric vehicle are locked, so that the goal of electric vehicle antitheft is achieved.

Description

technical field [0001] The invention belongs to the technical field of electrical control, and in particular relates to an anti-theft device and method for an electric vehicle that can still function after a storage battery is stolen. Background technique [0002] With the development of society and the continuous increase of fuel vehicles, the shortage of natural resources such as petroleum fuels and the global warming caused by fuel emissions have become increasingly prominent. Therefore, in this context, hybrid or pure power vehicles have gradually entered people's lives, and electric vehicles have emerged as the times require. Electric vehicles are deeply loved by consumers because of their environmental protection, fast and convenient features. [0003] With the increase in the number of electric vehicles, the number of stolen electric vehicles is also increasing year by year, and the problem of electric vehicle anti-theft is extremely serious. The implementation sche...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a scientific electric vehicle anti-theft control device for the shortcomings of the traditional electric vehicle anti-theft control method, such as high misjudgment rate, affecting the living environment, thieves can still use force to steal the car, and power failure cannot prevent theft. and methods

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