KR20050063287A - System and method for preventing battery thief in hybrid automobile - Google Patents

Abstract

The present invention relates to a system and method for preventing theft of expensive batteries, such as Ni-MH or Li-Ion batteries, which are mounted on a hybrid vehicle. If the battery of other vehicle is not installed, it is impossible to start and the power supply from the battery is prevented, thereby preventing the use of illegal battery and thereby preventing battery theft. A system and method for battery theft prevention of a hybrid vehicle having an effect.

Description

System and method for preventing battery thief in hybrid vehicles

The present invention relates to a system and method for preventing theft of expensive batteries, such as Ni-MH or Li-Ion batteries, which are mounted on a hybrid vehicle. If the battery of other vehicle is not installed, it is impossible to start and the power supply from the battery is prevented, thereby preventing the use of illegal battery and thereby preventing battery theft. A system and method for battery theft prevention of a hybrid vehicle having an effect.

Recently, as the automobile technology is developed from the internal combustion engine to the electric power source, the technology development for the 42V system and the hybrid vehicle, which are intermediate stages between the two power sources, is being concentrated.

An important part of such a 42V system and a hybrid vehicle is a battery that stores electric energy, and a high power and high capacity battery is required as electric energy is used as a main power, and such a battery is inevitably expensive.

As such, the price of Ni-MH batteries or Li-Ion batteries installed in a hybrid vehicle is high enough to cover a large amount of the overall price of the vehicle, and as hybrid vehicles become more popular, interest in such expensive batteries will increase. Obvious.

At present, there are many prior arts for high battery efficiency or state of charge (SOC) or battery management system (BMS) in relation to batteries of hybrid vehicles, but there are no known techniques for preventing theft of expensive batteries. Do.

12V batteries installed in internal combustion engine vehicles are negligible against theft because they are relatively inexpensive, but Ni-MH batteries or Li-Ion batteries for hybrid or fuel cell vehicles have high efficiency and high power. It is urgent to take measures against theft because it will be installed in the first place.

In other words, the battery is an important and indispensable part of the vehicle, and it is expensive, so there is a high risk of theft, and when audio is first introduced to a vehicle, Ni-MH batteries are used at the time of hybrid vehicle dissemination. Theft of expensive batteries, such as Li-Ion batteries, is also expected to increase significantly. Therefore, there is an urgent need for countermeasures.

Accordingly, the present invention has been invented to solve the above problems, and is used in conjunction with an immobilizer system, which is an existing vehicle anti-theft system, and is equipped with a battery of another vehicle instead of a unique battery of the vehicle originally provided with the vehicle. In this case, it is impossible to start the power supply and the power supply from the battery is prevented, thereby preventing the use of illegal batteries, thereby providing a system and method for preventing battery theft of a hybrid vehicle having an effect of preventing battery theft. Its purpose is to.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

A system for preventing battery theft of a hybrid vehicle according to the present invention includes a starter key having a built-in transponder for generating a vehicle-specific encryption code; A starter key assembly such that an antenna coil around a key cylinder receives battery power from the following immobilizer unit by inserting a starter key to operate the transponder and receive an encryption code therefrom; An immobilizer unit configured to receive battery power through the contact side of the relay that is turned on and actuate by inserting a ignition key to provide the antenna coil to the antenna coil and to receive an encryption code from the antenna coil; A BMS provided with an encryption code received by the antenna coil from the immobilizer unit and configured to intercept battery power supply to each electric vehicle, starter, and motor according to the result of authentication; And an HCU that receives the encryption code received by the antenna coil from the immobilizer unit and performs start control according to the result after authentication is performed.

In particular, two conductor blocks are connected to one side and the other side of the ignition key assembly by the ignition key body contacted when the ignition key is inserted. One of the two conductor blocks is grounded, and the other is It is characterized in that it is connected to the exciting coil of the relay provided between the battery.

The BMS includes a memory in which a vehicle's unique starting key ID is stored; A determination unit which receives an encryption code received by the antenna coil from the immobilizer unit, determines whether the ID corresponds to a start key ID of the memory, and outputs a signal for supplying or cutting off battery power according to the determination result; And an interruption circuit unit for interrupting the supply of battery power to each of the vehicle electrical equipment, the starter, and the motor by the signal output from the determination unit.

On the other hand, a method for preventing battery theft of a hybrid vehicle according to the present invention, the antenna coil of the ignition key assembly is supplied with battery power by receiving the ignition key receiving the unique encryption code of the vehicle from the transponder of the ignition key Wow; A BMS authentication step of receiving, by the BMS, an encryption code received by the antenna coil and determining whether or not it matches a pre-stored startup key ID; Intercepting, by the BMS, the battery power supply to each of the vehicle electronics, the starter, and the motor according to the authentication result; Performing an HCU authentication step of receiving an encryption code received by the antenna coil and determining whether the HCU matches the startup key ID previously stored therefrom; And performing, by the HCU, a start control according to a result of performing authentication.

In particular, the BMS compares the startup key ID read from the encryption code with the previously stored startup key ID and applies battery power, and if not, characterized in that the battery power is cut off.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a block diagram showing a system of the present invention, Figure 2 is a view showing a connection state of the starter assembly, the immobilizer unit and the battery in the present invention.

In addition, Figure 3 is a view showing a BMS integrated battery in the present invention, Figure 4 is a flowchart for explaining a method according to the present invention.

The present invention relates to a system and method for preventing theft of expensive batteries such as Ni-MH or Li-Ion batteries mounted in a hybrid vehicle. The present invention relates to an immobilizer system, which is an anti-theft system for an existing vehicle. In case of installing and using the battery of other vehicle which is not the original battery of the vehicle provided, it is impossible to start and the power supply from the battery is prevented, thereby preventing the use of illegal battery and thereby preventing battery theft. The present invention relates to a system and method for battery theft prevention.

As is well known, the immobilizer system of an existing vehicle is a system that generates an encryption code wirelessly from the ignition key and permits starting only when the engine ECU checks and matches the pre-stored ignition key ID.

In other words, when the driver inserts the ignition key into the keyhole to start the engine and turns it on, the engine ECU reads the ignition key ID stored in the ignition key. If it is not the vehicle's own original ignition key, shut off fuel injection and ignition control to prevent engine starting.

To this end, a transponder is built into the ignition key to generate a vehicle-specific encryption code.

The transponder is driven by electromagnetic forces derived from the antenna coils installed around the key cylinders. The transponders are responsible for encrypting the encryption code by the electromagnetic energy transmitted from the antenna coils when the starter key is turned on after the keyhole is inserted. And wirelessly transmit the encryption code to the antenna coil.

On the other hand, while applying the above-described immobilizer system applied to the existing vehicle, in the system and method of the present invention for the purpose of preventing battery theft of the hybrid vehicle, the conventional start key is inserted into the keyhole and then turned to the IG ON state Unlike operating the immobilizer system when operating, the immobilizer system is configured to be driven only by inserting the ignition key. For this purpose, the ignition key assembly included in the present invention is somewhat different from the conventional one.

First, a starter key assembly and an immobilizer system applied to the system and method of the present invention will be described.

As shown in FIG. 2, in the starter key assembly 20, an antenna coil 22 is installed around the key cylinder 21 into which the starter key 10 is inserted, as in the prior art, and the antenna of the key cylinder 21 is provided. Two conductor blocks 23a and 23b electrically connected by the starter key body 13 inserted into the key cylinder 21 are additionally installed in the coil 22.

Here, in the state in which the ignition key 10 is inserted into the key cylinder 21, both the conductive blocks 23a and 23b are installed to be in contact with the key body 13 made of a conductive material. An insulator 23c is interposed between the 23a and 23b to prevent direct current from flowing between the two conductive blocks 23a and 23b.

However, when the key body 13 is in contact with both the conductor blocks 23a and 23b while the starter key 10 is inserted into the key cylinder 21, the key between the two conductor blocks 23a and 23b. The electrical connection is made by the body 13.

Meanwhile, a relay 24 is installed between one of the two conductor blocks 23a and the battery 44, and the conductor block 23a and the battery 44 on one side are connected to the corresponding terminals on the coil side of the relay 24. Each is connected, and the other one of the two conductor blocks 23b is grounded to the vehicle body predetermined position.

In addition, the battery 44 and the immobilizer unit 30 are respectively connected to the corresponding terminals on the contact side of the relay 24, and in particular, the immobilizer unit 30 is connected to the antenna coil 22 around the key cylinder 21 to be relayed. (24) When driven on, the encryption code transmitted from the antenna coil 22 can be transferred to a BMS (Battery Management System) 40 and a hybrid control unit (HCU) 50 described later.

In this configuration, when the ignition key 10 is inserted into the key cylinder 21, the battery power applied through the coil side of the relay 24 passes through the conductor block 23a → the key body 13 of the start key → the conductor block ( 23b), the relay 24 is turned on while the coil side is excited, so that the power of the battery 44 is supplied to the immobilizer unit 30 through the contact side.

As a result, the immobilizer unit 30 is supplied with battery power to excite the antenna coil 22 only by inserting the ignition key 10. The immobilizer unit 30 is built in the ignition key handle 11 as in the conventional ignition key IG ON operation. The transponder 12 generates an encryption code by the electromagnetic energy transmitted from the antenna coil 22 and wirelessly transmits the encryption code to the antenna coil 22.

Therefore, the immobilizer unit 30 provides the encryption code received from the antenna coil 22 to the BMS 40 and the HCU 50 of the present invention even in a simple insertion state of the ignition key 10.

On the other hand, the BMS 40 is integral with the battery 44 as shown in Figure 3, in particular, as shown in Figure 1 memory 41 for storing the ignition key ID, and the immobilizer unit 30 A determination unit 42 for deciphering the encryption code inputted from the controller and determining whether it matches the ignition key ID stored in the memory 41 and outputting a signal for supplying or cutting off battery power according to the determination result; And an interruption circuit section 43 for selectively supplying / blocking the battery power to the respective electrical components, the starter, and the motor 60 by the signal output from the determination section 42.

Here, the memory 41 of the BMS 40 uses the diagnostic tool (eg, HI-SCAN) 70 of FIG. 3 to install the vehicle 44 in which the battery 44 is mounted via the communication line K line based on the GST protocol. The ignition key ID (which is the same as the ID stored in the vehicle's own original ignition key) must be input and stored in advance.

In addition, the determination unit 42 decrypts the encryption code input from the immobilizer unit 30 and extracts the ignition key ID extracted from the encryption code (an ID stored in a genuine ignition key unique to the vehicle in which the battery is mounted). Compared with the start key ID stored in advance in the memory 41, if the match is to output the control signal for applying the battery power to the respective electrical equipment and starter, motor 60 of the vehicle to the intermittent circuit portion 43, If not, the control signal to cut off battery power is output.

Meanwhile, in the present invention, the HCU 50 compares the ignition key ID extracted from the encryption code provided from the immobilizer unit 30 with the ignition key ID previously stored in its own memory (not shown), like the engine ECU of the existing vehicle. If there is a match, the engine is allowed to start and if it does not match, the engine is not started.

Of course, the memory of the HCU 50, like the memory 41 of the BMS 40, the vehicle's unique starting key ID (same as the ID stored in the vehicle's unique genuine start key) should be input and stored in advance.

Hereinafter, with reference to Figure 4 describes the operating state of the present invention.

First, when the ignition key 10 is inserted into the key hole 21a, the two conductor blocks 23a and 23b of FIG. 2 are electrically connected by the key body 13 of the ignition key 10 by inserting the ignition key. As a result, the relay 24 is turned on while the power supply of the battery 44 excites the coil side of the relay 24.

At the same time as the relay 24 is turned on, battery power is supplied to the immobilizer unit 30 and the antenna coil 22 via the contact side, wherein the transponder 12 is electromagnetic force induced from the antenna coil 22. Generates an encryption code and then wirelessly transmits to the antenna coil 22.

After that, the encryption code inputted to the immobilizer unit 30 through the antenna coil 22 is provided to the BMS 40, and in this BMS 40, the determination unit 42 decrypts the encryption code and then extracts it from the encryption code. Comparing the starter key ID with the starter key ID stored in the memory 41, and in case of a match, the determination unit 42 supplies a control signal for applying the battery power to each of the electric appliances, the starter and the motor 60, and And outputs a control signal for shutting down the battery power if it does not match.

The intermittent circuit unit 43 applies the battery power to each electronic device 60 by the control signal for supplying the battery power, and thus the ignition key ID extracted from the encryption code generated by the ignition key transponder 12. When the same as the ignition key ID stored in the BMS 40, the normal use of each electronic device is enabled by the power supplied from the normal battery 44 currently mounted on the vehicle.

However, the intermittent circuit unit 43 cuts off the battery power to each electronic device 60 by the control signal for the battery power cut off, and thus is extracted from the encryption code generated by the ignition key transponder 12. If the ignition key ID does not match the ignition key ID stored in the BMS 40, it corresponds to a case in which one of the ignition key and the battery is not genuine.

That is, in a typical vehicle, when the ignition key 10 is genuine, even if the battery 44 is not genuine, both the use and the starting of the electronic device are possible, but in the present invention, even if the ignition key is genuine, the BMS ( Since the certification in 40) is not made, the use and start-up of the electrical equipment are both impossible.

As a result, when illegally stealing a battery from another vehicle and attaching it to another vehicle, even if the ignition key is genuine, the use and starting of the electrical equipment are impossible as described above, and the battery cannot be used in another vehicle, resulting in battery theft. Can be prevented.

In particular, in the present invention, since the immobilizer system is driven only by inserting the ignition key, and then the authentication process of the ignition key and the battery is performed, when the battery is not a genuine battery of the vehicle, the ignition is inserted in any case (IG ON operation). The use of electrical equipment may be prohibited, even if it is not in a state.

Subsequently, when the driver operates the ignition key 10 in the IG ON state to start the vehicle, an authentication process is performed in the HCU 50 from an encryption code provided from the immobilizer unit 30, and at this time, the HCU 50 Permits startup if the startup key ID extracted from the password and code matches the startup key ID stored in its memory. Otherwise, the startup key is not allowed.

Of course, when the HCU 50 permits starting, engine starting and driving of the motor are possible, and when starting is not permitted, engine starting and driving of the motor are prohibited.

After all, according to the present invention by going through another authentication process in the HCU, along with the BMS authentication process, the start-up and the use of electrical equipment is possible only if the transponder of the ignition key and the ignition key ID of the BMS and HCU all match. Even if both the battery and the battery are stolen from the same vehicle (authentication is possible in BMS), the HCU will not be able to pass the certification and will not be able to start itself. Will be.

In this way, according to the present invention, it is possible to completely prohibit the use of the battery of the other vehicle, it is possible to prevent the use of illegal batteries, and eventually there is an effect that the battery theft accident does not occur.

As described above, according to the system and method for preventing battery theft of a hybrid vehicle according to the present invention, other vehicles other than the unique battery of the vehicle initially provided with the vehicle in connection with an immobilizer system, which is an existing vehicle antitheft system. In the case of mounting and using the battery, the power supply from the battery is prevented from being started and the illegal battery can be prevented, thereby preventing theft of the battery.

1 is a block diagram showing a system of the present invention,

2 is a view showing a connection state of the starter assembly, the immobilizer unit and the battery in the present invention,

3 is a view showing a BMS integrated battery in the present invention,

4 is a flowchart for explaining a method according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: start key 11: key handle

12: transponder 13: ignition key body

20: starter key assembly 21: key cylinder

22: antenna coil 23a, 23b: conductor block

23c: insulator 24: relay

30: immobilizer unit 40: BMS

41: memory 42: determination unit

43: intermittent circuit portion 50: HCU

Claims (5)

A start key incorporating a transponder for generating a vehicle specific encryption code; A starter key assembly such that an antenna coil around a key cylinder receives battery power from the following immobilizer unit by inserting a starter key to operate the transponder and receive an encryption code therefrom; An immobilizer unit configured to receive battery power through the contact side of the relay that is turned on and actuate by inserting a ignition key to provide the antenna coil to the antenna coil and to receive an encryption code from the antenna coil; A BMS provided with an encryption code received by the antenna coil from the immobilizer unit and configured to intercept battery power supply to each electric vehicle, starter, and motor according to the result of authentication; An HCU that receives the encryption code received by the antenna coil from the immobilizer unit and performs start control according to the result after authentication is performed; System for preventing theft of the battery of the hybrid vehicle comprising a. The method according to claim 1, One side and the other side of the key cylinder of the starter key assembly are provided with two conductor blocks which are interconnected by the starter key body which is contacted when the starter key is inserted, one of the two conductor blocks being grounded, and the other one being connected to the battery. The system for preventing theft of the battery of a hybrid vehicle, characterized in that connected to the excitation coil of the relay installed between. The method according to claim 1, The BMS, A memory for storing a vehicle's unique start key ID; A determination unit which receives an encryption code received by the antenna coil from the immobilizer unit, determines whether the ID corresponds to a start key ID of the memory, and outputs a signal for supplying or cutting off battery power according to the determination result; An interruption circuit section for interrupting the supply of battery power to each of the vehicle electrical equipment, the starter, and the motor by the signal output from the determination section; System for preventing theft of the battery of the hybrid vehicle comprising a. Receiving an encryption code unique to the vehicle from a transponder of the ignition key by receiving the battery power from the antenna coil of the ignition key assembly by inserting the ignition key; A BMS authentication step of receiving, by the BMS, an encryption code received by the antenna coil and determining whether or not it matches a pre-stored startup key ID; Intercepting, by the BMS, the battery power supply to each of the vehicle electronics, the starter, and the motor according to the authentication result; Performing an HCU authentication step of receiving an encryption code received by the antenna coil and determining whether the HCU matches the startup key ID previously stored therefrom; Performing start control by the HCU according to a result of performing authentication; Method for preventing battery theft of a hybrid vehicle comprising a. The method according to claim 4, When the BMS compares the startup key ID read out from the encryption code and the previously stored startup key ID, the battery power is applied when the match is not matched, and otherwise, the battery power is prevented. Way.