TECHNICAL FIELD
The present subject matter relates to a vehicle. More particularly, the present subject matter relates to a self-powered vehicle security system for the vehicle.
BACKGROUND
Vehicle security systems are widely used to deter vehicle theft, prevent theft of valuables from a vehicle, deter vandalism, and to protect vehicle owners and occupants. The security systems either prevent starting of the vehicle (i.e. a vehicle immobiliser) or set off an audible alarm, or both. Typically, the vehicle security system's main functionality is to restrict access of the vehicle to only the owner of the vehicle carrying the original key or keyfob containing the electronics synched to the vehicle.
In a known vehicle security system, a remote access feature is provided through the key fob. The key fob typically includes one or more buttons that can be pressed to activate or access the vehicle security system and hence allows an individual to remotely control functions of the vehicle, such as lock/unlock doors or trigger the alarm. Such security systems, even as after market 'retrofit' systems, are installed on the vehicle and are connected into the vehicle's electrical wiring system. The vehicle security system requires uninterrupted supply of electrical power to get actuated so as to detect unauthorised entry or use of the vehicle.
Generally, a vehicle battery installed on the vehicle provides electric power to the vehicle security system so that at least one microcontroller installed in the security system remains enabled and gets actuated to send and receives authentication signals in response to at least one ECU of the plurality of the ECUs installed on the vehicle, whenever an unauthorised intrusion or entry of the vehicle takes place.

[0005] In another known vehicle with the vehicle security system, said at
least one microcontroller of the security system is electrically connected to the vehicle battery to obtain the necessary working voltage, so as to transmit and receive authentication signals to said at least one ECU of the plurality of ECUs, corresponding to the signals transmitted and received by the key fob.
[0006] Conventionally, different types of vehicle security systems are used
to prevent or to diminish the probability of theft to a vehicle or other object upon which they are deployed. While, many of these vehicle security systems adequately protect vehicles and other objects, they suffer from various drawbacks. For example, the existing vehicle security system requires a relatively large amount or supply of electrical power to maintain the readiness or functionality of the system receiver in order that the system is capable of responding to a transmitted signal by the key fob. However, if the electrical circuit between the vehicle battery and said at least one microcontroller of the security system gets disconnected, then the security system becomes unable to function, i.e., the security system is unable to detect the unauthorised entry or the use of the vehicle.
[0007] Further, with another known vehicle having the security system, the
vehicle when parked for relatively large periods, may cause the vehicle battery to become discharged due to the relatively large amount of power which was and is required by these vehicle security systems. Thus, with the vehicle battery being disconnected, loses power or is discharged, the needed source for electrical power is lost. Hence, the alternatives with the vehicle user is to kick -start or jump-start the vehicle or to restore, replace the battery or install a back up vehicle battery on the vehicle. However, such installation of the backup vehicle battery on the vehicle increases the cost to the owner of the vehicle, increases the overall weight of the vehicle and additionally may result in increased number of components on the vehicle with limited space provided therein.
[0008] Hence, it is desirable to provide an improved security system for the
vehicle, which can prevent the unauthorized operation and theft of the vehicle in the event when the electric power from the vehicle battery to the security system

is not available and hence prevents the unauthorised use of the vehicle. Additionally, it is needed to provide the improved security system which can provide a compact installation of the vehicle security system on the vehicle without increasing cost and overall weight of the vehicle.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The detailed description is described with reference to the
accompanying figures. The same numbers are used throughout the drawings to reference like features and components.
[00010] Fig.1 illustrates a vehicle security system with at least one
rechargeable battery integrally installed therein, as per one embodiment of the present invention.
[00011] Fig.2 illustrates the vehicle security system and at least one electrical
and electronic component getting powered from a vehicle battery according to one embodiment of the present invention
[00012] Fig.3 illustrates a method of providing intrusion detection by a
vehicle security system as per one embodiment of the present invention
DETAILED DESCRIPTION
[00013] Vehicle security system detects unauthorized intrusion attempts and
activates alarm devices such as sirens or lights to warn off the intruder and call attention to the intrusion, and in most cases such system will also activate a relay or other electronic circuits disabling the vehicle ignition system.
[00014] A typical vehicle security system is incorporated as part of the
electronic system of a vehicle and provides a selection of security functions such as intrusion alarm arming and automatic door looking. It can also serve as a user convenience system to aid in the location of a vehicle located in a crowded parking lot or to remotely start the vehicle.
[00015] With respect to vehicle manufacturers, nearly all motorized vehicles
are presently manufactured with some level of built-in security system. These

systems, commonly referred to as Original Equipment Manufacturer or OEM systems, range from mechanical ignition locks that prevent ignition and steering wheel turning until a vehicle is activated by a key, to computerized systems that not only disable the vehicle when an attempted theft or vandalism is detected, but also provide features like automatic door locks, automatic trunk latch, dome light control, headlight control and remote control of various accessories. These electronic security systems are wired during the manufacturing process and are fully integrated into the rest of the vehicle's electrical system.
[00016] In an existing vehicle, the vehicle security system includes a control
circuit comprising of at least one microcontroller to communicate with said at least one ECU of the plurality of ECUs including engine control unit, motor control, display control etc installed on the vehicle through at least one communication protocol including Universal Asynchronous Receiver/Transmitter (UART), Controller Area Network (CAN), Local Interconnect Network (LIN), K-LINE, and FlexRay protocols for performing at least one activity and monitoring at least one function of said vehicle. Hence, the vehicle security system has to be powered round the clock to communicate with said at least one ECU of the plurality of ECUs electronic control to protect the vehicle from theft or unauthorised access.
[00017] Typically, the vehicle anti-theft or security system's main operative
power is ordinarily drawn from a vehicle battery. Generally, the vehicle security system including at least one microcontroller is electrically connected to the vehicle battery to obtain the necessary working voltage. For example, a known security system of the vehicle, the vehicle security system is electrically connected to the lead-acid battery for starting a combustion engine of the vehicle.
[00018] However, the known vehicle security system remains activated till the
electric power is supplied to the system from the vehicle battery. The vehicle security system remains electrically connected to the vehicle battery attached for controlling a vehicle ignition. Any disconnection of the vehicle battery from the security system or the dead battery of the vehicle caused by the continuous power

drain due to the long period of parking disables the vehicle security system and hence any unauthorised use or entry to the vehicle can be easily accessed. The vehicle when parked for relatively large periods may cause the vehicle battery to become discharged due to the relatively large amount of power which was and is required by these vehicle security systems. However, with the alternative of providing another vehicle battery on the vehicle to supply power to the security system when the main vehicle battery has got discharged or disconnected, will increase the overall weight, cost, increased number of components on vehicle.
[00019] Hence, it is desirable to provide an improved and a low cost vehicle
security system for a vehicle that can insure security system operation when the main operative power is not available from the vehicle battery or charging. Further, it is needed to provided an improved vehicle security which prevents unauthorized operation and theft in the event the main vehicle battery is disconnected or dead.
[00020] With the above objectives in view, the present invention provides a
self-powered security system comprising an integrally installed at least one rechargeable battery therein. Thus, as per one embodiment, said at least one rechargeable battery acts as a backup or reserve battery and powers the security system when main operative power from the vehicle battery is turned off, or cut off.
[00021] Further, the present invention relates to said at least one
rechargeable battery of low-voltage being integrally installed within said vehicle security system to cater its low power needs over a long period of time and hence providing a compact installation in said security system. Additionally, integrally installing said at least one rechargeable battery reduces the cost of wiring required to supply power to vehicle security system and space in the vehicle.
[00022] The present invention relates to vehicle security systems, and more
particularly to the security systems employing said at least one rechargeable battery integrally installed therein and hence eliminates the additional wiring harness to install said at least one rechargeable battery on the vehicle.

[00023] The present invention describes the vehicle security system including
a control unit, said at least one microcontroller operable by a remote control device that is the key fob, a battery charging circuit arranged therein to selectively permit the vehicle battery to supply electric power for the purpose of charging said at least one rechargeable battery integrally installed within said security system.
[00024] The present invention is related to the vehicle security system and
more particularly to a system and the method of providing intrusion detection by the vehicle security system to prevent the unauthorised access or theft of the vehicle.
[00025] Further, the present invention, describes a self-powered, standalone
vehicle security system with integrally installed said at least one rechargeable battery therein. As per one embodiment, said at least one rechargeable battery supplies the sufficient amount of power for the security system to function for a predetermined time and get charged from battery charging circuit receiving power from the vehicle battery on requirement.
[00026] Referring to one embodiment of the present invention, the vehicle
security system is based on radio frequency communication between the key fob and said at least one micro controller installed in said security system. In the condition the vehicle key fob is not an original key fob, the security system which is activated by one of the triggering mechanisms doesn’t activate said at least one ECU including the engine control unit. However, in the condition when the vehicle key fob is the original key fob, the security system activates said at least one ECU including the engine control unit to enable engine start, lock/unlock the handle bar of the vehicle through electronic actuation.
[00027] According to one embodiment of the present invention, one or more
ECU interfaces identifies said at least one communication protocol including Universal Asynchronous Receiver/Transmitter (UART), Controller Area Network (CAN), Local Interconnect Network (LIN), K-LINE, and FlexRay protocols to communicate with said at least one ECU of the plurality of the ECUs installed on

the vehicle. In one embodiment, said one or more ECU interfaces include at least one input ECU interface and at least one output ECU interface. As per one embodiment, said at least one input ECU interface includes Switch Input-I, Switch Input-II acting as an actuation to initiate vehicle security system, said at least one output ECU interfaces comprises at least one indication interface including TSL LH, RH and Siren O/P, LED Indication O/P, a data communication interface including CAN interface, and a battery management system (BMS) wakeup to actuate the electric power supply to said at least one electrical and electronic components of the vehicle
[00028] It is an object of the present invention to provide a self-powered,
standalone vehicle security system as a theft deterrent device which can be simply, efficiently installed on the vehicle and economically manufactured.
[00029] Further, one embodiment of the present invention relates to a typical
engine-electric hybrid vehicle employing a conventional engine with an electric motor to assist the vehicle under specific load conditions and also enable the vehicle to move in pure electric mode when there is no fuel in the tank. However, for an engine-electric hybrid, the electric power is supplied by a lithium ion battery equipped with a battery management system (BMS). The engine-electric hybrid vehicle is sourced by higher voltage batteries in the range of 38-96V and the vehicle gets power only on successful actuation of the battery management system (BMS) which later turns ON all the required loads connected to the BMS.
[00030] As per one embodiment of the present invention, the vehicle main
battery may be a lead-acid battery, nickel-metal hydride (“Ni-MH”) and lithium-ion (“Li-ion”) battery with voltage storage in the range of 38 to 96v. However, as per one embodiment of the present invention, said at least one rechargeable battery is a lithium ion battery with low-voltage, thereby providing compact installation within the vehicle security system without increasing the overall cost and weight of the vehicle. In another embodiment, said at least one rechargeable battery is a is a lead-acid battery.

[00031] According to one embodiment of the present invention, said security
system including the battery charging circuit is electrically being connected to the vehicle battery and said at least one rechargeable battery is integrally installed within said security system. Referring to one embodiment, said at least one rechargeable battery provides backup power to the vehicle security system when the supply of the electric power from the vehicle battery to said vehicle security system and said at least one ECU of said plurality of ECUs is disconnected or not available. As per one embodiment of the present invention, said at least one rechargeable battery integrally installed within said security system is charged at full rate through the battery charging circuit installed in the security system when either the vehicle's engine is running or if the ignition system is energized.
[00032] Referring to one embodiment of the present invention, the vehicle
security system with said at least one rechargeable battery installed therein is a backup source or reserve battery for providing power to said security system and enable operation of said at least one microcontroller in said security system to communicate with said at least one ECU of the plurality of the ECUs, in the event when electrical power is not available from said vehicle battery.
[00033] The present invention relates generally to the vehicle security system
and, more particularly, to the security system for detecting unauthorized intrusion into a vehicle. Further, said at least one rechargeable battery integrally installed within said system is able to backup or reserve power from the vehicle battery and is well maintained and charged to assure its availability.
[00034] It would therefore be advantageous to provide a system and method for
providing intrusion detection by the vehicle security system to prevent the theft or unauthorised access to the vehicle. As per one embodiment of the present invention, the security system for the vehicle with said at least one rechargeable battery acts as the backup and the reserve battery and supplies power to the system in the event the main power supply from the vehicle battery is cut-off and hence, keep the vehicle security system always active with any unauthorised access to the vehicle. Referring to one embodiment, the vehicle security system is a

self-powered, standalone system, with said at least one rechargeable battery being a low-voltage battery and thereby providing a compact arrangement in the system and hence doesnot impart additional cost increase in vehicle. As per one embodiment, said at least one rechargeable battery being integrally installed within said security system gets charged through a power supplied from the vehicle battery to said battery charging circuit installed in the system. Thus, preventing unauthorized entry or access the vehicle in the event the vehicle battery is disconnected or dead.
[00035] Exemplary embodiment detailing features of the vehicle security
system, in accordance with the present invention will be described hereunder. The embodiments described herein apply to the electric-hybrid vehicle powered by an internal combustion engine and a drive electric motor. However, the present invention is not restricted in its application and is also applicable to vehicles employing the drive electric motor or by the internal combustion engine alone. Further, it will be appreciated that the application of the present invention may be extended to all two-wheeled vehicles, three-wheeled vehicle and the four-wheeled vehicle. It is to be noted that in the ensuing description, the present invention describes the vehicle security system for the electric-hybrid vehicle with a lithium ion battery having the battery management system (BMS).
[00036] Various other features and advantages of the invention are described
in detail below with reference to the accompanying drawings. In the drawings, like reference numbers generally indicate identical, functionally similar, and/or structurally similar elements. The drawing in which an element first appears is indicated by the leftmost digit(s) in the corresponding reference number. With reference to the accompanying drawings, wherein the same reference numerals will be used to identify the same or similar elements throughout the several views. It should be noted that the drawings should be viewed in the direction of orientation of the reference numerals.
[00037] Fig. 1 shows a vehicle security system (100) illustrating said at least
one rechargeable battery (400) integrally installed therein. As per one

embodiment of the present invention, the vehicle security system (100) comprises a control circuit (110) including at least one transceiver (105), (106), (107), (109) and at least one microcontroller (104). As per one embodiment, said control unit (110) is configured to receive signals from a vehicle key fob (10). Referring to one embodiment, the key fob (10) includes a transceiver (12) and at least one Electronic Control Unit (ECU) (not shown), at least one battery (14) to provide a power source to said at least one transceiver (12), at least one antenna (13) and at least one LED and at least one button (11). As per one embodiment, said at least one transceiver (12) installed in the key fob (10) performs modulation and demodulation of analog signals transmitted and received by the keyfob (10) to the vehicle via said at least one antenna (13) upon press of at least one button (11) and consecutive indication of the operation using said at least one LED (15). As per one embodiment of the present invention, said control circuit (110) comprises said at least one microcontroller (104) coupled with said at least one transceiver (105), (106), (107), (109) including a CAN transceiver (106), a voltage regulator used to regulate voltage to few components which require accurate voltage to operate and at least one level shifter (108) for interfacing said at least one microcontroller (104) with said at least one transceiver (105), (106), (107), (109) in condition when both operates at different rated voltages.
[00038] Further, as per one embodiment of the present invention, said at least
one transceiver (105), (106), (107), (109) acts as modulator and demodulator of the analog signals transmitted and received from the vehicle security system (100) to the keyfob (10) via at least one antenna (302), (303) including backup antenna (303) of the vehicle security system (100) and said at least one antenna (13) of the keyfob (10). As per one embodiment, said plurality of electronic control units (ECUs) installed in the vehicle communicates with the vehicle security system (100) to prevent starting of the vehicle engine on unauthorised access or theft of the vehicle and further said at least one of said plurality of ECUs is operable to provide intrusion detection for said vehicle. Referring to one embodiment of the present invention, said plurality of electronic control units (ECUs) communicates

with said control circuit (110) of the vehicle security system through said at least one communication protocol.
[00039] Further in Fig.1, as per one embodiment of the present invention, said
vehicle battery (16) on the vehicle provides the electric power to at least one electrical and electronic component including the vehicle security system (100) on the vehicle for controlling a vehicle ignition system. Referring to one embodiment of the present invention, said vehicle security system (100) further comprises said at least one rechargeable battery (400) integrally installed therein and said at least one rechargeable battery (400) having one or more positive and negative terminals is electrically connected to said vehicle security system (100) and provides power supply (102) to the vehicle security system (100) in the event the electric power from the vehicle battery (16) is not available. In one embodiment, said vehicle security system (100) includes the battery charging circuit (103) installed therein for providing electric power to said at least one rechargeable battery (400) from said vehicle battery (16) and a power converter circuit (101) for converting the voltage levels of said at least one rechargeable battery (400) to the desired value at which the control circuit (110) of the vehicle security system (100) operates. As per one embodiment of the present invention, said one or more ECU interfaces identifies said at least one communication protocol (600) (shown in Fig.2). In one embodiment, said one or more ECU interfaces include at least one input ECU interface and at least one output ECU interfaces. Referring to one embodiment said at least one input ECU interface includes Switch Input-I (300), Switch Input-II (301) acting as an actuation to initiate vehicle security system (100), said at least one output ECU interfaces comprises at least one indication interface including TSL LH, RH and Siren O/P (200), LED Indication O/P (201), a data communication interface including CAN interface (202), and a battery management system (BMS) wakeup (203) to actuate the electric power supply to said at least one electrical and electronic component of the vehicle. In one embodiment, said at least one ECU of the plurality of the ECUs installed on the vehicle communicates with the control circuit (110) of the vehicle security system (100) through at least one communication protocol (600) (shown in Fig.2). In one

embodiment, said at least one rechargeable battery (400) is a lithium ion battery of low voltage. Furthermore, referring to one embodiment of the present invention, said plurality of ECUs are engine control unit, motor control unit, display control unit, etc.
[00040] Fig. 2 illustrates the vehicle security system (100) and at least one
electrical and electronic component getting powered from the vehicle battery (16). According to one embodiment of the present invention, the vehicle battery (16) is a lithium-ion battery equipped with the battery management system (BMS) (501). As per one embodiment of the present invention, the plurality of the ECUs communicate with each other through at least one communication protocol (600) including Universal Asynchronous Receiver/Transmitter (UART), Controller Area Network (CAN), Local Interconnect Network (LIN), K-LINE, and FlexRay protocols which will facilitate a data transfer to said at least one ECU of the plurality of ECUs at the desired data transfer rate with the desired number of bits to be transferred at the desired security level of communication. As per one embodiment of the present invention, the vehicle security system (100) communicates with said at least one electrical and electronic component installed on the vehicle through said at least one communication protocol (600).
[00041] Further in Fig.2, in one embodiment, said at least one electrical and
electronic component including the battery management system (BMS) (501), the hybrid control unit (HCU) (502), the instrument cluster (503), and the transistor controlled ignition (TCI) (504) installed on the vehicle gets electric power supply from the vehicle battery (16) with varied rated output voltages. As per one embodiment, when the charge in said at least one rechargeable battery (400) drains below a predetermined level, then said at least one electrical and electronic component and the vehicle security system (100) on the vehicle gets electric power supply from the vehicle battery (16). According to one embodiment of the present invention, the vehicle with the lithium ion vehicle battery (16) is equipped with the battery management system (BMS) (501). As per one embodiment, the electric power is supplied to said at least one electrical and electronic component

through said battery management system (BMS) (501). Referring to one embodiment, the battery management system (BMS) (501) operates at deep sleep state with power supply from the vehicle battery (16) being cuts-off or not available to said at least one electrical and electronic component including the hybrid control unit (502), the instrument cluster (503), and the engine control unit (504) installed on the vehicle. As per one embodiment of the present invention, the vehicle security system (100) gets actuated on reciving of said authentication signals sent by the key fob (10) (shown in Fig.1). Thus, on receiving of authentication signals from the key fob (10), the vehicle security system (100) actuates the battery management system (BMS) (501) via a wakeup mechanism (601) and consecutively communicates to said at least one ECU of the plurality of the ECUs in the form of a unique data communication via at least one communication protocol. Referring to one embodiment, said battery management system (BMS) (501) operates in a steady mode when the vehicle security system (100) sends authentication signals in response to the signals sent by the key fob (10) (shown in Fig.1). Referring to one embodiment, the battery management system (BMS) (501) on being activated by the vehicle security system (100) actuates said at least one electrical and electronic component on the vehicle thus indicating the authorized access by the user of the vehicle and preventing the vehicle from the theft.
[00042] Fig.3 illustrates a method (700) of providing intrusion detection by
the vehicle security system (100) to prevent the unauthorised access or theft of the vehicle. As per one embodiment of the present invention, the vehicle security system (100) including the control unit (110) is provided on the vehicle. Referring to one embodiment of the present invention, after providing the vehicle security system (100) in the vehicle, the method (700) of providing intrusion detection by a vehicle security system (100) comprises following steps: step 701, the vehicle battery (16) powers said at least one electrical and electronic component including the vehicle security system (100) on the vehicle. As per one embodiment of the present invention, said at least one rechargeable battery (400) is integrally installed within the vehicle security system (100) in step 702, for providing

electric power to the vehicle security system (100), in the event the electric power from the vehicle battery (16) is not available. Referring to one embodiment of the present invention, the battery charging circuit (103) installed in said vehicle security system (100) provides charging to said at least one rechargeable battery (400) through an electrical energy generated by the vehicle battery (16), in step 703. In step 704, the user of the vehicle performs a kick start operation on a kick starting mechanism of the vehicle, when electric power from the vehicle battery (16) is not available for starting the vehicle engine from an "engine off' condition.
[00043] As per one embodiment of the present invention, in step 705, the
vehicle security system (100) determines whether the key fob (10) is available to generate and send authentication signals to said at least one of the plurality of the ECUs of the vehicle. As per one embodiment, in step 707, if the key fob (10) is not available to send authentication signals to the plurality of the ECUs of the vehicle, then the vehicle security system (100) sends a do-not-start command to said at least one ECU to thereby disable a vehicle ignition system.
[00044] Further in Fig.3, as per one embodiment, if the key fob (10) is
available to send authentication signals to the plurality of the ECUs of the vehicle then in step 706, the vehicle security system (100) determines whether the signals received by at least one ECU of the plurality of ECUs from the key fob (10) are authentication signals. Referring to one embodiment, if the signals received by said at least one ECU of the plurality of the ECUs from said key fob (10) are authentication signals, then the vehicle security system (100) sends a start command to said at least one ECU to thereby enabling the vehicle ignition system in step 708. Hence, the vehicle security system (100) authorizes the user of the vehicle to access the vehicle. However, if the signals received by said at least one ECU of the plurality of the ECUs from the key fob (10) are not authentication signals, then the vehicle security system (100) sends said do-not-start command to said at least one ECU to the plurality of the ECUs, to thereby disable a vehicle ignition system so as to prevent the vehicle from actually starting as in step 707.

[00045] Advantageously, as per one embodiment of the present invention, the
vehicle security system is the self-powered, standalone vehicle security with said at least one rechargeable battery integrally installed therein. In one embodiment, said at least one rechargeable battery acts as the backup and reserve power source for the security system when the electric power from the vehicle battery is not available to actuate the vehicle security system for preventing the vehicle from unauthorised access. Thus, with said at least one rechargeable battery installed in said security system, the vehicle is prevented from unauthorised access and theft round the clock. Referring to one embodiment of the present invention, said at least one rechargeable battery with low power voltage is cost-effective and easy to install within said vehicle security system.
[00046] Improvements and modifications may be incorporated herein without
deviating from the scope of the invention.

We claim:
1. A vehicle security system (100), said system (100) comprising:
a vehicle battery (16) adapted for providing an electric power to the vehicle security system (100); and
characterized in that at least one rechargeable battery (400) is integrally provided in said vehicle security system (100) for supplying power thereto in the event said vehicle battery (16) is electrically disconnected from said vehicle security system (100).
2. The vehicle security system (100) as claimed in claim 1, wherein a battery charging circuit (103) is installed in the vehicle security system (200) for providing electric power to said at least one rechargeable battery (400) from said vehicle battery (16).
3. The vehicle security system (100) as claimed in claim 1, wherein a control circuit (110) including at least one transceiver (105), (106), (109) and at least one microcontroller (104) is configured to receive signals from a vehicle key fob (10)
4. The vehicle security system (100) as claimed in claim 1, wherein a plurality of electronic control units (ECUs) installed in the vehicle are electrically connected to said control circuit (110) through at least communication protocol (600).
5. The vehicle security system (100) as claimed in claim 3, wherein said at least one communication protocol (600) includes Universal Asynchronous Receiver/Transmitter (UART), Controller Area Network (CAN), Local Interconnect Network (LIN), K-LINE, and FlexRay protocols
6. The vehicle security system (100) as claimed in claim1, wherein said at least one rechargeable battery (400) is a lithium ion battery.

7. The vehicle security system (100) as claimed in claim 1, wherein said at least one rechargeable battery (400) is a lead acid battery.
8. The vehicle security system (100), as claimed in claim 1, wherein said plurality of ECUs includes an engine control unit, a fuel injection control unit, a motor control unit, a display control unit etc.
9. The vehicle security system (100), as claimed in claim 1, wherein the vehicle battery (16) is a lead-acid battery.
10. The vehicle security system (100), as claimed in claim 1, wherein the vehicle battery (16) is a lithium ion battery.
11. The vehicle security system (200), as claimed in claim 1, wherein the vehicle battery (16) is equipped with a battery management system (BMS) (501).
12. A method (700) of providing intrusion detection by a vehicle security system (100); said method comprising steps of:
powering a vehicle security system (100), by a vehicle battery (16);
powering said vehicle security system (100), by at least one rechargeable battery (400) being integrally provided therein, in the event the vehicle battery (16) is electrically disconnected from said vehicle security system (100);
charging said at least one rechargeable battery (400), by a battery charging circuit (103) installed in said vehicle security system (100) through an electrical energy generated by the vehicle battery (16); and
performing a kick start operation on a kick starting mechanism of the vehicle, by the user of the vehicle, when electric power from the vehicle

battery (16) is electrically disconnected to said vehicle security system (100) for starting the vehicle engine from an engine off' condition.
13. The method (700) of providing intrusion detection by the vehicle security system (100) as claimed in claim 12, wherein said method comprising steps of:
determining by the vehicle security system (100), whether the key fob (10) is available to generate and send authentication signals to the plurality of the ECUs of the vehicle;
if the key fob (10) is not available to send authentication signals to the plurality of the ECUs of the vehicle;
the vehicle security system (100) sends a do-not-start command to said at least one ECU to thereby disable a vehicle ignition system;
if the key fob (10) is available to send authentication signals to the plurality of the ECUs of the vehicle;
determining by the vehicle security system (100), whether the signals received by at least one ECU of the plurality of ECUs from said key fob (10) are authentication signals;
if the signals received by said at least one ECU of the plurality of the ECUs from said key fob (10) are authentication signals, then the vehicle security system (100) sends a start command to said at least one ECU, thereby enabling the vehicle ignition system;
authorizing by the vehicle security system (100), to the user of the vehicle to access the vehicle; and

if the signals received by said at least one ECU of the plurality of the ECUs from said key fob (10) are not authentication signals, then the vehicle security system sends said do-not-start command to said at least one ECU to the plurality of the ECUs, thereby disabling a vehicle ignition system.