CN105966347A - Electric car anti-theft system - Google Patents

Abstract

The invention discloses an electric vehicle anti-theft system, which mainly includes: a control unit, a wireless remote control unit, a storage battery protection module, an alarm module and a power supply module, and the wireless remote control unit includes a first data receiving module, a first data transmitting module and an audible and visual alarm module; after the battery protection module is triggered, the trigger signal is transmitted to the control unit, and after being processed by the control unit, the electrical signal is transmitted to the alarm module and the sound and light alarm module on the wireless remote control unit respectively; it overcomes the wireless remote control in the prior art The trigger terminal of the type anti-theft is too single, and the information of the electric vehicle cannot be synchronized to the owner, and there is no technical defect in anti-theft for the battery, so that the anti-theft performance of the electric vehicle is more comprehensive, reliable and efficient, and at the same time reduces the cost.

Description

Anti-theft system for electric vehicles

technical field

The invention relates to the field of anti-theft technology, in particular to an anti-theft system for an electric vehicle.

Background technique

With the development of industry, traditional energy sources are shrinking, and resources are unsustainable. Most of the energy closely related to daily life like oil comes from imports and is easily affected by external factors. For example, the second Iraq war made the global oil supply tense, and OPEC kept raising the price of crude oil in order to protect its own interests. Moreover, our country's oil reserves are not large, so the oil price fluctuates severely, and the five-yuan era quickly returned to the six-yuan era after only a few days. Coupled with the proposal of the national sustainable development strategy and the improvement of environmental protection awareness, electric vehicles came into being in such a market environment. It uses renewable energy electric energy as the driving energy. Electric vehicles have a great advantage in the price advantage of one-time consumption and subsequent consumption, and they are convenient, fast, energy-saving and environmentally friendly, occupying a small space, and basic during driving. The advantage of no noise pollution is sought after by the working class, the student party and short-distance travellers, and its development prospects are very broad.

Compared with vehicles such as automobiles and motorcycles that use petroleum as energy, electric vehicles are low-speed vehicles, which makes them easier to control and less likely to cause accidents during low-speed driving, making electric vehicles have better characteristics. safety and reliability. In addition, its requirements for energy supply are not as harsh as traditional energy sources, and there must be gas stations. Electric vehicles only need a 220V charging socket, which is more convenient for people's daily life. No matter where they drive, as long as there is a home, they can charge the car, saving the trouble of finding a gas station. With the development of charging technology, the construction and investment of charging piles, the speed of using charging has achieved a qualitative leap, so electric vehicles are the preferred means of transportation for office workers and students who travel short distances, and there will be more and more people in the future. Become an electric vehicle user.

However, just because more and more people choose electric vehicles as a means of transportation, it also brings huge temptation to theft. Since the vast majority of electric vehicles have not been registered in the traffic police department and the anti-theft technology is not yet perfect, electric vehicles are easy to obtain and sell stolen goods, and the vehicle information cannot be provided after the electric vehicle is stolen, which makes it difficult to recover the electric vehicle. situation. And because the price of lead continues to rise, more and more thieves have also turned their attention to the storage battery of electric vehicles. Theft cases are not uncommon. Therefore, a new anti-theft system that is comprehensive, reliable, efficient, and cost-effective for mass consumption is extremely in line with the needs of the market, and the topic comes from this.

As the requirements and demands of electric vehicle users for the anti-theft system continue to rise, the development of the electric vehicle anti-theft system is also forced to be more rapid and more mature. At present, there are relatively advanced GPS global satellite positioning anti-theft systems, GSM mobile communication network anti-theft systems, GPRS (General Packet Radio Service) network anti-theft systems and intelligent anti-theft systems.

There are various anti-theft methods for electric vehicles, and the types are roughly divided into lock anti-theft devices, wireless remote control anti-theft devices, electromechanical anti-theft devices, and network anti-theft devices. What my country uses most at present is exactly the combined anti-theft method of lockset anti-theft device cooperating with wireless remote control type anti-theft device. Anti-theft locks generally use mechanical locks to lock the handlebars or wheels to prevent the vehicle from being stolen. Although mechanical locks have made breakthroughs in technology and materials over the years, mechanical locks can only prevent theft and cannot alarm. Waiting for work, and the mechanical lock is very easy to be picked. Especially vulnerable to a single blow at all under the hydraulic pliers, so that the lock anti-theft device can only prevent theft to a certain extent and delay the time of theft. And the wireless remote control type anti-theft cannot synchronize the information of the electric vehicle to the car owner. In many cases, it is still easy for criminals to succeed. For example, in a noisy environment or during a thunderstorm, the electric vehicle is easily triggered by the external environment to generate an alarm. At this time, no one will pay attention to the situation of the electric vehicle. If At this time, someone is eyeing the electric car that has taken you, and they can easily succeed in two minutes. Therefore, electronic anti-theft like this is far from being able to meet the requirements of anti-theft. In foreign countries, many car owners will choose GPS global positioning system to protect their cars. For example, the 10 Electrified electric moped launched by vanmoof has batteries built into the frame during manufacture, which effectively prevents the risk of battery theft, and a GPS module is installed inside the vehicle. Even if it is stolen, you can know where your car is through the Internet, and recover the car with the help of the police. Because the one-time cost of installing GPS, GSM, and GPRS is much higher than other anti-theft methods, and users are required to pay follow-up service fees, this makes most electric vehicle owners unwilling to accept it and cannot be widely used, so they are in the electric vehicle market. The prospects are less.

In the process of realizing the present invention, the inventor found that in the prior art, at least most electric vehicle users still use anti-theft devices such as mechanical anti-theft and one-way anti-theft modes, which cannot effectively ensure the safety of electric vehicles. In anti-theft design, the trigger terminal of the wireless remote control anti-theft is too single, most of which are only vibration sensors, and the defect that the information of the electric vehicle cannot be synchronized to the owner, and at the same time overcome the current market. A defect that makes electric vehicle batteries often stolen.

Contents of the invention

The object of the present invention is to address the above problems and propose an electric vehicle anti-theft system to realize the alarm of the anti-theft system to realize the two-way alarm between the owner and the vehicle, and to prevent the battery of the electric vehicle from being stolen.

In order to achieve the above object, the technical solution adopted by the present invention is: an electric vehicle anti-theft system, mainly comprising: a control unit, a wireless remote control unit, a battery protection module, an alarm module, and a power supply module, and the wireless remote control unit includes a first The data receiving module, the first data transmitting module and the sound and light alarm module; the battery protection module and the alarm module are respectively connected with the control unit, and the power supply module is respectively connected with the wireless remote control unit, the battery protection module and the alarm module; the battery protection module After being triggered, the trigger signal is transmitted to the control unit. After being processed by the control unit, the electrical signal is transmitted to the alarm module and the first data receiving module on the wireless remote control unit respectively, and the signal is transmitted to the sound and light alarm module after processing. A data transmitting module continuously sends wireless signals to the control unit, and when the control unit fails to receive the wireless signal, an alarm module is triggered.

Further, it also includes a relay protection circuit, the relay protection circuit is connected with the control unit, the control unit processes the control signal transmitted by the wireless remote control unit, and then sends it to the relay protection circuit to control the on-off of the relay protection circuit, and then control the electric vehicle The switch between the anti-theft state and the non-theft state.

Further, the control unit includes a second data transmitting module, a second data receiving module and a single chip microcomputer, the first data transmitting module sends the wireless control signal of the wireless remote control module to the second receiving module of the control unit, and the first data transmitting module transmits the wireless control signal of the wireless remote control module to the second receiving module of the control unit. The second data receiving module receives the control signal transmitted by the second transmitting module of the control unit; the second receiving module and the second transmitting module are respectively connected with the single-chip microcomputer.

Further, the battery protection module includes a time base integrated circuit, and the time base integrated circuit is specifically NE555

Further, the battery protection module specifically includes that the reset terminal pin and the power supply VCC terminal pin of the NE555 are respectively connected to the power supply VCC; the capacitor C3 is connected between the threshold terminal pin and the ground pin of the NE555; the capacitor C4 Connected between the control terminal and the ground pin of NE555; the resistor R7 is connected between the VCC terminal pin of the NE555 and the threshold terminal pin; the discharge terminal of the NE555 is connected to the threshold terminal pin of the NE555.

Further, the resistance value of the capacitor C3 is 4.7μF, the capacitance value of the capacitor C4 is 103F, and the resistance value of the resistor R7 is 10K.

Further, the single-chip microcomputer adopts AT89S51.

Further, the second receiving module and the second receiving module are 315 wireless transceiver modules, which use SC2262 and SC2272-M4 to code, transmit and decode data respectively.

Further, the relay protection circuit is specifically that the emitter of the triode Q2 is connected to the power supply VCC, the base of the triode Q2 is connected to the single-chip microcomputer through the resistor R9, and the collector of the triode Q2 is connected to the first coil terminal of the relay J1; the relay The second terminal of J1 is connected to the ground terminal, the common contact of relay J1 is connected to the second pin of the interface CON; the normally closed contact of relay J4 is connected to the common contact of J1 of the relay, and the normally closed contact of relay J4 is also connected It is connected with the first pin of the interface CON; the normally open contact of the relay J1 is connected with the microcontroller through the third pin of CON.

Further, the resistance value of the resistor R9 is 1K, the relay J1 adopts SRD_05V, and the transistor Q2 adopts 9012.

The various embodiments of the present invention mainly include: a control unit, a wireless remote control unit, a battery protection module, an alarm module and a power supply module, and at the same time, a specific design is made for the relay module and the battery protection module; Incorporating multiple protective measures such as two-way alarm mode, battery closed anti-theft circuit and anti-theft system backup power supply, it can effectively solve the previous defects such as single trigger, vehicle anti-theft without key anti-theft, passive anti-theft and single power supply, and effectively improve anti-theft performance. Therefore, this design adopts this cost-effective anti-theft solution that meets the market demand and can effectively prevent theft. Thereby can overcome the defect that the anti-theft means in the prior art is simple, and the trigger end of the wireless remote control type anti-theft is too single, and most of them only have a vibration sensor, and the information of the electric vehicle cannot be synchronized to the owner. The anti-theft device for protecting the accumulator causes the defect that the accumulator of the electric vehicle is often stolen. At the same time, the communication distance between the remote control and the tram is set. When the communication distance is exceeded, such as when the tram is transferred by someone, or other communication failures occur between the tram and the remote control, such as when the communication terminal of the tram is deliberately destroyed or blocked by someone, the alarm circuit of the tram will be activated. It will also call the police to remind the car owner, so that the anti-theft performance of the electric vehicle is more comprehensive, reliable and efficient, and at the same time reduces the cost.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, and are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the attached picture:

Fig. 1 is a structural composition block diagram of a kind of electric vehicle anti-theft system of the present invention;

Fig. 2 is a battery protection circuit diagram of an electric vehicle anti-theft system according to the present invention;

Fig. 3 is a relay protection circuit diagram of an electric vehicle anti-theft device according to the present invention.

detailed description

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

Specifically, in FIG. 1, the electric vehicle anti-theft control system includes: a control unit, a wireless remote control unit, a battery protection module, an alarm module and a power supply module, and the wireless remote control unit includes a first data receiving module, a first data transmitting module and Sound and light alarm module; the battery protection module and the alarm module are respectively connected to the control unit, and the power module is respectively connected to the wireless remote control unit, the battery protection module and the alarm module; after the battery protection module is triggered, the trigger signal is transmitted to the control unit Unit, after being processed by the control unit, transmits the electrical signal to the alarm module and the first data receiving module on the wireless remote control unit respectively, and transmits the signal to the sound and light alarm module after processing, and the first data transmitting module continuously sends wireless signals to the control unit. signal, when the control unit cannot receive the wireless signal, trigger the alarm module.

Set the wireless communication distance between the remote control terminal and the control unit to a short distance (such as 5m-10m). When people deliberately destroy or block, the control unit cannot receive the wireless signal from the remote control terminal, and the alarm circuit of the tram will also alarm to remind the owner.

It also includes a relay protection circuit, the relay protection circuit is connected with the control unit, the control unit processes the control signal emitted by the wireless remote control unit, and sends it to the relay protection circuit to control the on and off of the relay protection circuit, and then control the anti-theft state of the electric vehicle Switching from non-theft-proof state.

The control unit includes a second data transmitting module, a second data receiving module and a single-chip microcomputer, the first data transmitting module sends the wireless control signal of the wireless remote control module to the second receiving module of the control unit, and the second data receiving module The module receives the control signal transmitted by the second transmitting module of the control unit; the second receiving module and the second transmitting module are respectively connected with the single-chip microcomputer.

The system selects single-chip microcomputer AT89S51 as the control center of the anti-theft system, and uses DF wireless data transmission to complete the signal transmission between the remote control and the electric workshop. Use the touch delay circuit to alarm and prevent theft of the battery. Connect the trigger terminal of the circuit to the battery protection cover. When someone wants to steal the battery, the circuit is triggered to generate a high level input to the single-chip microcomputer, complete the alarm and feed back the signal to the remote control Trigger sound and light alarm.

In order to meet the functional requirements of the system design and make the system as simple and efficient as possible. The transmission conditions for infrared wireless data transmission are relatively high, and it is not suitable for use in an urban environment with many buildings, and its anti-theft circuit needs to be refitted to the battery box of the electric vehicle, which is troublesome to put into use. The anti-interference and environmental adaptability of wireless data transmission are stronger, and when the voltage is 12V, the effective transmission distance is about 500 meters. The touch delay circuit only needs one wire to connect the battery cover, and the installation is simple.

The anti-theft alarm system consists of three parts: the remote control part, the main control part and the power supply part. AT89S51 is used as the core control chip of the entire anti-theft system, which is responsible for judging and processing information and making corresponding decisions. The remote control part is capable of encoding, sending, receiving and decoding control signals, which ensures the mutual transmission and control of data between the remote control and the main control part. The main control part is composed of data transceiver module, vibration sensor module, battery anti-theft circuit, single chip microcomputer AT89S51 and sound and light alarm. The data transceiver module, like the remote control part, has the work of encoding, decoding and data transmission. The circuit damage detection module is to generate a signal to control the sound and light alarm part to give an alarm after the circuit is damaged. The design has a backup power supply. If the thief cuts off the power supply to cut off the power supply of the anti-theft device, the backup power supply can play a role; even if the battery is dead, the electric vehicle has the ability to work normally.

In FIG. 2 , the battery protection module includes a time base integrated circuit, and the time base integrated circuit is specifically NE555.

Specifically, the battery protection module is that the reset terminal pin and the power supply VCC terminal pin of the NE555 are respectively connected to the power supply VCC; the capacitor C3 is connected between the threshold terminal pin of the NE555 and the ground pin; the capacitor C4 is connected to the NE555 Between the control terminal and the ground pin; the resistor R7 is connected between the VCC terminal pin of the NE555 and the threshold terminal pin; the discharge terminal of the NE555 is connected to the threshold terminal pin of the NE555.

The resistance of the capacitor C3 is 4.7μF, the capacitance of the capacitor C4 is 103F, and the resistance of the resistor R7 is 10K.

The single-chip microcomputer adopts AT89S51.

The second receiving module and the second receiving module are 315 wireless transceiver modules, which use SC2262 and SC2272-M4 to code, transmit and decode data respectively.

The design uses single-chip AT89S51 as the main control center of the electric vehicle anti-theft system, and uses 315 wireless data transceiver module and SC2262 and SC2272-M4 to encode, transmit, receive and decode data. When the arming key of the remote control is pressed, the arming signal is transmitted to the vehicle-mounted main control terminal through the transmitting module, and the relay on the electric vehicle lock circuit is disconnected through the processing of the single-chip microcomputer, and the system enters the anti-theft state. Under the action of the anti-theft circuit of the battery, when someone approaches the battery and triggers the anti-theft circuit, the anti-theft system will send out an alarm and send the information to the remote control of the nearby (250m~300m) car owner in two sets of different data, triggering the remote control on the remote control. Sound and light alarm, let the owner know the information of the electric vehicle in the first time. The car alarm will be turned off after a delay of 20s and will return to the anti-theft state. When the disarm key is pressed, the relay on the car lock circuit is closed, and the car anti-theft system is in a non-working state.

The battery anti-theft circuit is another way for the electric vehicle to take the initiative, but the battery anti-theft circuit is designed for the battery of the electric vehicle. The battery anti-theft circuit consists of a time base circuit NE555, two capacitors and a resistor. The pin 1 of the time base circuit NE555 is grounded together with the circuit; the pin 2 is the trigger terminal of the time period of the NE555, it only needs a wire, and the wire is connected to the battery cover during installation, when someone touches it , the clutter signal voltage induced by the human body is transmitted to the trigger terminal of NE555 through C ₄ , so that the output of NE555 changes from low level to high level, and pin 3 is converted to the driving current of high level output. At the same time , the 7th pin of the time base circuit is internally cut off, the power supply charges C ₃ through R, when the voltage rises to two-thirds of the power supply voltage, the 7th pin of the time base circuit is turned on, C ₃ discharges, and the time base circuit Pin 3 outputs a high level, and the output high level signal is sent to the P2.6 port of the single-chip microcomputer. After the internal analysis and decision-making of the single-chip microcomputer, the alarm circuit is triggered and the signal that the battery anti-theft circuit is triggered is sent to the remote control terminal through the vehicle-mounted 315M transmitter module. Remind the owner to pay attention to the condition of the electric vehicle. The delay time depends on the values of the resistor R7 and the capacitor C ₃ : T=1.1R ₇ ×C ₃ . The whole circuit is relatively simple, and the trigger mode is flexible, which is very practical.

The relay protection circuit described in Fig. 3 is specifically that the emitter of the triode Q2 is connected to the power supply VCC, the base of the triode Q2 is connected to the single-chip microcomputer through the resistor R9, and the collector of the triode Q2 is connected to the first coil terminal of the relay J1; the relay J1 The second terminal of the relay is connected to the ground terminal, the common contact of the relay J1 is connected to the second pin of the interface CON; the normally closed contact of the relay J4 is connected to the common contact of the J1 of the relay, and the normally closed contact of the relay J4 is also connected to the common contact of the relay J1 The first pin of the interface CON is connected; the normally open contact of the relay J1 is connected with the microcontroller through the third pin of CON.

The resistance value of the resistor R9 is 1K, the relay J1 adopts SRD_05V, and the transistor Q2 adopts 9012.

The relay protection circuit is used to cooperate with the remote control to arm and disarm the system to switch on and off the main circuit of the electric vehicle. When the arming is completed, the main circuit of the electric vehicle is in a power-off state, and when it is disarmed, the main circuit of the electric vehicle is turned into a power-on state. The relay circuit is composed of SRD-5VDC relay, CON3 interface, transistor 9012 and 1k current limiting current. Pin 4 of the relay is a normally closed contact, and pin 5 is a normally open contact. Connect the loop of the main circuit to pin 1 and pin 2 of CON3 respectively. When the remote control terminal presses the S ₁ arming key, the signal will be processed by the single chip microcomputer after being sent and received, so that _P1 . Point 5 is closed, the main circuit is disconnected, and the function of arming and cutting off the power supply of the main circuit is completed. And when the car owner presses the S3 disarm button _on the remote control, the signal is transmitted to the single-chip microcomputer for processing, and the P1.0 port outputs a high-level signal. complete conduction. The relay protection circuit effectively prevents thieves from starting the electric car directly when they pry open the lock of the electric car. Under the action of the relay protection circuit, it can only control whether the main circuit of the electric car is powered on by remote control, which adds a layer of protection to the safety of the electric car. .

After arming, the system enters the standby state. When someone touches the battery cover and triggers the delay circuit, the delay circuit outputs a high level to the P2.6 port of the single-chip microcomputer, and after processing by the single-chip microcomputer, it outputs a low level at the P1. High level to the vehicle wireless transmitter module. After the system is armed, the delay circuit is triggered, and the alarm circuit alarm is completed and the signal is fed back to the remote control.

At the same time, set the wireless communication distance between the remote control end and the tram control unit as a short distance, such as 5m-10m. If the communication is interrupted, the electric car triggers the alarm circuit to send out an alarm signal to remind the electric car that the state is abnormal. The risk of trams being transferred and stolen is avoided, and the risk of trams being deliberately destroyed is also avoided.

At least the following beneficial effects can be achieved: multiple protection measures including two-way alarm mode, battery closed anti-theft circuit and anti-theft system backup power supply can effectively solve the problem of single trigger, vehicle anti-theft without focus on anti-theft, passive anti-theft and single power supply in the past. A variety of defects have effectively improved the anti-theft performance. The solution overcomes the defects of simple anti-theft means in the prior art, and the trigger terminal of wireless remote control anti-theft is too single. Most of them only have vibration sensors, and the information of electric vehicles cannot be synchronized to the owner. The anti-theft device for protecting the accumulator causes the defect that the accumulator of the electric vehicle is often stolen. At the same time, set the wireless communication distance between the remote control end and the tram control unit as a short distance, such as 5m-10m. If the communication is interrupted, the electric car triggers the alarm circuit to send out an alarm signal to remind the electric car that the state is abnormal. The risk of trams being transferred and stolen is avoided, and the risk of trams being deliberately destroyed is also avoided. The anti-theft performance of the electric vehicle is more comprehensive, reliable and efficient, and the cost is reduced at the same time.

Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still The technical solutions recorded in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. An electric vehicle anti-theft control system, characterized in that it comprises a control unit, a wireless remote control unit, a storage battery protection module, an alarm module and a power supply module, and the wireless remote control unit includes a first data receiving module, a first data transmitting module and Sound and light alarm module; the battery protection module and the alarm module are respectively connected to the control unit, and the power module is respectively connected to the wireless remote control unit, the battery protection module and the alarm module; after the battery protection module is triggered, the trigger signal is transmitted to the control unit Unit, after being processed by the control unit, transmits the electrical signal to the alarm module and the first data receiving module on the wireless remote control unit respectively, and transmits the signal to the sound and light alarm module after processing, and the first data transmitting module continuously sends wireless signals to the control unit. signal, when the control unit cannot receive the wireless signal, trigger the alarm module. 2. The anti-theft control system for electric vehicles according to claim 1, further comprising a relay protection circuit, the relay protection circuit is connected to the control unit, and after the control unit processes the control signal transmitted by the wireless remote control unit, Send it to the relay protection circuit to control the on and off of the relay protection circuit, and then control the switching between the anti-theft state and the non-theft state of the electric vehicle. 3. A kind of electric vehicle anti-theft control system according to claim 2, characterized in that, said control unit comprises a second data transmitting module, a second data receiving module and a single-chip microcomputer, and said first data transmitting module wirelessly The wireless control signal of the module is sent to the second receiving module of the control unit, and the second data receiving module receives the control signal transmitted by the second transmitting module of the control unit; the second receiving module and the second transmitting module communicate with the single chip microcomputer respectively connect. 4 . The electric vehicle anti-theft control system according to claim 3 , wherein the battery protection module includes a time-based integrated circuit, and the time-based integrated circuit is specifically NE555. 5. An electric vehicle anti-theft control system according to claim 4, wherein the battery protection module is specifically that the reset terminal pin and the power supply VCC terminal pin of the NE555 are respectively connected to the power supply VCC; C3 is connected between the threshold terminal pin of NE555 and the ground pin; capacitor C4 is connected between the control terminal of NE555 and the ground pin; resistor R7 is connected between the power supply VCC terminal pin of NE555 and the threshold terminal pin; The discharge end of the NE555 is connected to the threshold end pin of the NE555. 6. An electric vehicle anti-theft control system according to claim 5, wherein the resistance value of the capacitor C3 is 4.7 μF, the capacitance value of the capacitor C4 is 103 F, and the resistance value of the resistor R7 is 10K. 7. An electric vehicle anti-theft control system according to claim 3, wherein the single-chip microcomputer adopts AT89S51. 8. An electric vehicle anti-theft control system according to claim 6, wherein the second receiving module and the second receiving module are 315 wireless transceiver modules, and SC2262 and SC2272-M4 are used to encode and transmit data respectively with decoding reception. 9. An electric vehicle anti-theft control system according to claim 2, wherein the relay protection circuit is specifically that the emitter of the triode Q2 is connected to the power supply VCC, and the base of the triode Q2 is connected to the single-chip microcomputer through a resistor R9 , the collector of the transistor Q2 is connected to the first coil terminal of the relay J1; the second terminal of the relay J1 is connected to the ground terminal, the common contact of the relay J1 is connected to the second pin of the interface CON; the normally closed contact of the relay J4 The point is connected with the public contact of J1 of the relay, and the normally closed contact of relay J4 is also connected with the first pin of the interface CON; the normally open contact of relay J1 is connected with the single-chip microcomputer through the third pin of CON. 10 . The electric vehicle anti-theft device according to claim 9 , wherein the resistance value of the resistor R9 is 1K, the relay J1 is SRD_05V, and the triode Q2 is 9012. 11 .