Wide-voltage electric vehicle anti-theft apparatus with short-circuit protection and working method

Abstract

The invention provides wide-voltage electric vehicle anti-theft apparatus with a short-circuit protection and a working method, and relates to anti-theft apparatus and a working method thereof. A coil of a relay of a conventional anti-theft apparatus, which is controlled in a voltage reducing manner through a high power transistor and a large resistor, consumes electricity, has a small operating voltage range, and requires high cost; and the anti-theft apparatus cannot judge short circuit, so that once an electric vehicle is short circuited, the electric vehicle anti-theft apparatus is burnt out when electric start is conducted or an alarm is given, and fire is caused in severe cases. The electric vehicle anti-theft apparatus comprises a detection device, an anti-theft device and a control device, wherein, the control device comprises a relay. The electric vehicle anti-theft apparatus is characterized in that the control device comprises a relay control unit; the relay control unit comprises a single chip computer, a power source voltage detection circuit connected with an input port of the single chip computer, and a relay control circuit connected with a pulse width modulation signal output port of the single chip computer; and the single chip computer is provided with a pulse width computation module and a pulse width signal output module. The relay has a wide working voltage and consumes little energy; and as the anti-theft apparatus can detect short circuit, the safety performance is high.

Description

technical field [0001] The invention relates to an anti-theft device and a working method. Background technique [0002] With the rapid development of electronic technology, its application involves every field in our daily life. Electric vehicles are no exception, and almost all electric vehicles are equipped with electronic anti-theft devices. Existing anti-theft devices for electric vehicles do well in the functions of alarm and detection, but they are not enough in terms of reducing power consumption, versatility, reliability, and safety. In order to prevent theft, after the key of the electric vehicle is removed, the relay is electrically connected to the power supply and the motor circuit, which can be used to prevent theft by holding the wheel; the coil of the relay is controlled by a high-power transistor and a large resistor, which not only increases power consumption, but also increases the working voltage. The range is also small and the cost is high. In additi...

AI Technical Summary

Problems solved by technology

In addition, the existing technology cannot judge whether there is a short circuit in the electric car, because the anti-theft device is uninterruptedly energized for a long time, once the electric car has a short circuit, the electric car will be burned when it is started by electricity (starting without the electric car key) or when the alarm is given. Anti-theft device, it will cause fire in severe cases

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