Device and method for electric vehicle antitheft based on relay

Abstract

The invention discloses a device and method for electric vehicle antitheft based on a relay. The device for electric vehicle antitheft comprises a relay coil and three relay normally-closed contacts connected with the relay coil. The relay coil is in parallel connection with a storage battery, the ends of the three relay normally-closed contacts are correspondingly connected with a phase A, a phase B and a phase C of a three-phase winding respectively, the other ends of the three relay normally-closed contacts are in ground connection, and the phase A, the phase B and the phase C of the three-phase winding are in ground connection respectively through the three relay normally-closed contacts. The invention further provides a method for applying the device for electric vehicle antitheft. The method comprises the steps that when a connecting line of the storage battery is cut off, the relay coil is powered down, the three relay normally-closed contacts are in a closed state, the three-phase winding of a stator of a brushless direct current motor is short-circuited through the three relay normally-closed contacts, a rotor of the brushless direct current motor cannot rotate, wheels of an electric vehicle are locked, and 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 based on a relay 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 im...

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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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