Vehicle

Abstract

The utility model discloses a vehicle which comprises a battery module, a key starting circuit, a vehicle body control module, an electronic control unit, an anti-backflow circuit and a USB interface, the key starting circuit is connected between the battery module and the vehicle body control module, and the vehicle body control module is used for obtaining a first signal representing that the key starting circuit is conducted; the vehicle body control module is further connected with the battery module so as to obtain a second signal transmitted by the battery module; the vehicle body control module is configured to respond to the second signal when acquiring the first signal and control the electronic control unit to start; the anti-backflow circuit is connected between the vehicle body control module and the USB interface and is in one-way conduction in the direction from the common end of the key starting circuit and the vehicle body control module to the USB interface, and the USB interface is used for being connected with external equipment. Through the arrangement, external equipment connected to the USB interface is prevented from providing a voltage signal for awakening the vehicle body control module, so that the risk that the vehicle is stolen is reduced, and the safety of the vehicle is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle engineering, and in particular, to a vehicle. Background Art

[0002] Currently, most vehicles are equipped with USB interfaces. The vehicle can be connected to external devices through the USB interfaces. The external devices can be portable devices, mobile power supplies, storage media, etc. When the vehicle is in the powered-on state, if the USB interface is connected to an external device, the vehicle's battery can charge the external device.

[0003] The USB interfaces configured in existing vehicles are generally TYPE-A interfaces. The protocol of the TYPE-A interface does not clearly define the host side (vehicle) and the device side (external device). When the external device is a mobile power supply, it will cause the TYPE-A interface end to be charged, resulting in abnormal operation of the entire vehicle.

[0004] If the USB interface configured in the vehicle is a TYPE-C interface, although the protocol of the TYPE-C interface clearly defines the host side (vehicle) and the device side (external device), in the software design process of some vehicles, the host side is not prohibited by software, resulting in the TYPE-C interface end being charged and causing abnormal operation of the entire vehicle.

[0005] Among them, the abnormal operation of the entire vehicle may cause the external device to be able to wake up the BCM (Body Control Module) by skipping the physical key. At this time, pressing the vehicle's start button can start the vehicle, resulting in huge potential safety hazards and theft risks for the vehicle. Summary of the Utility Model

[0006] In order to solve the deficiencies of the prior art, the purpose of the present utility model is to provide a vehicle that can prevent the reverse current of the external device from waking up the vehicle and make the vehicle safer.

[0007] To achieve the above purpose, the present application adopts the following technical solutions:

[0008] A vehicle includes a battery module, a key start circuit, a body control module, an electronic control unit, an anti-reverse current circuit, and a USB interface. The key start circuit is connected to the battery module, and a first signal is generated when the key start circuit is turned on; the body control module is connected to the battery module and the key start circuit and receives the first signal; the electronic control unit is connected to the body control module, and the body control module controls the start of the electronic control unit according to the first signal; the anti-reverse current circuit is connected between the body control module and the USB interface and conducts unidirectionally from the common end of the key start circuit and the body control module to the USB interface. The USB interface is used to connect an external device to deliver the energy of the battery module to the external device.

[0009] Further, the body control unit includes a first end and a second end. The first end of the body control module is connected to the key start circuit, and the second end of the body control module is connected to the electronic control unit. The first end is a low-voltage input terminal, and the second end is a high-voltage output terminal.

[0010] Further, the anti-backflow circuit is connected to the first end of the body control module.

[0011] Further, the vehicle further includes an instrument and a lamp, and the electronic control unit, the instrument and the lamp are connected to the second end of the body control module.

[0012] Further, the anti-backflow circuit includes a first diode. The anode of the first diode is connected to the common terminal where the body control module is connected to the key start circuit, and the cathode of the first diode is connected to the USB interface.

[0013] Further, the anti-backflow circuit further includes a second diode and a capacitor. The cathode of the second diode is connected to the cathode of the first diode, the anode of the second diode is grounded, and the capacitor is connected in parallel across the two ends of the second diode.

[0014] Further, the anti-backflow circuit includes a switching tube. The control terminal of the switching tube is connected to the common terminal where the body control module is connected to the key start circuit. The first end of the switching tube is connected to the USB interface, and the second end of the switching tube is grounded. Wherein, the first end of the switching tube is also connected to the common terminal where the body control module is connected to the key start circuit to obtain the current flowing through the USB interface.

[0015] Further, the switching tube is one of a triode, a MOS field-effect transistor, and an insulated gate bipolar transistor IGBT.

[0016] Further, the anti-backflow circuit and the USB interface are integrated into a USB power supply unit, and the USB power supply unit is detachably connected to the body control module.

[0017] Further, the anti-backflow circuit is integrated into the body control module, and the USB interface is detachably connected to the anti-backflow circuit.

[0018] The vehicle provided by the present application avoids the external device connected to the USB interface from providing a voltage signal to wake up the body control module by setting an anti-backflow circuit between the USB interface and the body control module, thereby reducing the risk of vehicle theft and improving the safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the vehicle in the embodiment of the present application;

[0020] Figure 2 It is a schematic connection diagram of the circuit modules of the vehicle in the embodiment of the present application;

[0021] Figure 3 This is the circuit structure diagram of an anti-backflow circuit in an embodiment of the present application;

[0022] Figure 4 This is the circuit structure diagram of an anti-backflow circuit in another embodiment of the present application. Specific embodiments

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the specific embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application.

[0024] As Figure 1 shown, an embodiment of the present application provides a vehicle 100, which includes a vehicle frame 11, a suspension assembly 12, a traveling assembly 13, and a power system 14. The vehicle frame 11 constitutes the basic framework of the vehicle 100. The suspension assembly 12 is connected to the vehicle frame 11. The traveling assembly 13 is installed on the suspension assembly 12. There is a transmission connection between the power system 14 and the traveling assembly 13. The power system 14 is used to drive the vehicle 100 to travel. It should be noted that the vehicle 100 includes, but is not limited to, motorcycles and all-terrain vehicles.

[0025] As Figure 2 shown, the vehicle 100 further includes a battery module 15, a key start circuit 16, a body control module 17 (BCM, Body Control Module), and an electronic control unit 18 (ECU, Electronic Control Unit). The battery module 15, also known as a storage battery, is a device that directly converts chemical energy into electrical energy, and is mainly used to provide energy for the circuit components of the vehicle 100. Among them, the circuit components include the above-mentioned key start circuit 16, body control module 17, and electronic control unit 18, and also include the instruments, lamps, etc. of the vehicle 100, which will not be elaborated here.

[0026] The key start circuit 16 is connected to the battery module 15, and the key start circuit 16 is also connected to the body control module 17. The key start circuit 16 is configured with a switch, and the switch is controlled by a key that matches the vehicle 100, so that the key start circuit 16 is turned on or off. When the key start circuit 16 is turned on, the battery module 15 can provide a first signal to wake up the body control module 17. When the key start circuit 16 is turned off, the body control module 17 is in a sleep state or a low-voltage working state, and at this time the vehicle 100 is powered off.

[0027] The body control module 17 is used to obtain a first signal indicating the conduction of the key start circuit 16. The body control module 17 is also connected to the battery module 15, so that the body control module 17 can obtain a second signal delivered by the battery module 15. When the body control module 17 obtains the first signal, the body control module 17 is awakened and starts the electronic control unit 18 according to the obtained second signal, that is, allocates a voltage that enables it to work properly to the electronic control unit 18.

[0028] The electronic control unit 18 is connected to the body control module 17. When the electronic control unit 18 works, it powers on the vehicle 100 by triggering the start button of the vehicle 100, or starts the power system 14 of the vehicle 100.

[0029] As an implementation, the vehicle 100 further includes an anti-backflow circuit 19 and a USB interface 21. The anti-backflow circuit 19 is connected between the body control module 17 and the USB interface 21 and conducts unidirectionally from the common end of the key start circuit 16 and the body control module 17 to the USB interface 21. The USB interface 21 is used to connect external devices, and the external devices include but are not limited to portable devices, mobile power supplies, storage media, etc. When the key start circuit 16 conducts, the battery module 15 outputs current and flows through the key start circuit 16, the anti-backflow circuit 19 and the USB interface 21 to charge the external devices.

[0030] Specifically, the body control module 17 includes a first end and a second end. The first end of the body control module 17 is connected to the key start circuit 16. When the key start circuit 16 conducts, the first end of the body control module 17 obtains the first signal output by the battery module 15. At this time, the body control module 17 is awakened in response to the first signal. The second end of the body control module 17 is connected to the electronic control unit 18. Since the body control unit is also connected to the battery module 15, and the battery module 15 continuously outputs a second signal to the body control module 17. The body control module 17 is configured to output a second signal when obtaining the first signal to start the electronic control unit 18, the instrument and the lamps, etc.

[0031] It should be noted that the first end is used to represent the low-voltage input end of the body control module 17. For example, when the first end of the body control module 17 receives a voltage greater than 3.3V, the inside of the body control module 17 conducts, enabling the body control module 17 to enable power-consuming units such as the electronic control unit 18, the instrument and the lamps. The second end is used to represent the high-voltage output end of the body control module 17. For example, the body control module 17 outputs a voltage greater than 12V through the second end to drive the above-mentioned power-consuming units. Among them, the second end includes at least one high-voltage output end for connecting different power-consuming units.

[0032] In an embodiment of the present application, the anti-backflow circuit 19 is connected to the first end of the body control module 17, or the anti-backflow circuit 19 is connected to the common end of the key start circuit 16 and the body control module 17. Circuit components such as the electronic control unit 18, the instrument, and the lamps are all connected to the second end of the body control module 17.

[0033] With the above arrangement, it is avoided that the external device connected to the USB interface 21 is charged, resulting in the body control module 17 being woken up by the voltage backflow from the external device when the vehicle 100 is powered off, thereby improving the anti-theft performance of the vehicle 100 and making the vehicle 100 safer.

[0034] As Figure 3 shown, as an implementation manner, the anti-backflow circuit 19 includes a first diode D1. The anode of the first diode D1 is connected to the common end where the body control module 17 and the key start circuit 16 are connected, and the cathode of the first diode D1 is connected to the USB interface 21. With the above arrangement, the anti-backflow circuit 19 is made to conduct unidirectionally from the common end of the key start circuit 16 and the body control module 17 to the USB interface 21, avoiding the body control module 17 being woken up by the voltage backflow from the external device when the key start circuit 16 is disconnected.

[0035] Furthermore, the anti-backflow circuit 19 further includes a second diode D2 and a capacitor C. The cathode of the second diode D2 is connected to the cathode of the first diode D1, the anode of the second diode D2 is grounded, and the capacitor C is connected in parallel across the second diode D2. The circuit composed of the second diode D2 and the capacitor C plays a role in freewheeling and voltage stabilization when the battery module 15 charges the external device.

[0036] As an alternative implementation manner, the anti-backflow circuit 19 further includes a switching tube M. The control end of the switching tube M is connected to the common end where the body control module 17 and the key start circuit 16 are connected. The first end of the switching tube M is connected to the USB interface 21, and the second end of the switching tube M is grounded. Among them, the first end of the switching tube M is also connected to the common end where the body control module 17 and the key start circuit 16 are connected, so that the first end of the switching tube M can obtain the current flowing through the USB interface 21.

[0037] Exemplarily, when the key start circuit 16 is turned on, the voltage applied by the battery module 15 acts on the control terminal of the switching transistor M, causing the switching transistor M to conduct in the direction from the first end to the second end, and the battery module 15 supplies power to the external device connected to the USB interface 21. When the key start circuit 16 is turned off, the voltage at the control terminal of the switching transistor M is 0, or the voltage at the control terminal of the switching transistor M always remains below the conduction voltage, and the switching transistor M turns off. The voltage of the external device connected to the USB interface 21 cannot be applied to the body control module 17, thereby preventing the body control module 17 from being awakened by the external device and preventing the vehicle from starting when the key start circuit 16 is turned off, making the vehicle safer.

[0038] Specifically, the switching transistor M is one of a triode, a MOS field effect transistor, and an insulated gate bipolar transistor IGBT.

[0039] As Figure 4 shown, exemplarily, the switching transistor M is configured as a triode. The base of the triode is connected to the common terminal where the body control module 17 and the key start circuit 16 are connected. The collector of the triode is connected to the USB interface 21, and the emitter of the triode is grounded. Among them, the collector of the triode is also connected to the common terminal where the body control module 17 and the key start circuit 16 are connected.

[0040] Exemplarily, the switching transistor M is configured as an N-type field effect transistor. The gate of the NMOS transistor is connected to the common terminal where the body control module 17 and the key start circuit 16 are connected. The source of the NMOS transistor is connected to the USB interface 21, and the drain of the NMOS transistor is grounded. Among them, the source of the NMOS transistor is also connected to the common terminal where the body control module 17 and the key start circuit 16 are connected.

[0041] As an implementation, the anti-backflow circuit 19 and the USB interface 21 are integrated into a USB power supply unit 200, and the USB power supply unit 200 is detachably connected to the body control module 17. Thereby, when improving the existing vehicle 100, by replacing the USB interface 21 of the existing vehicle, the existing vehicle is made to have the function of avoiding the current backflow of external devices, improving the safety of the vehicle.

[0042] Optionally, the anti-backflow circuit 19 is integrated into the body control module 17, and the USB interface 21 is detachably connected to the anti-backflow circuit 19. Thereby, the risk of the anti-backflow circuit 19 being disassembled is reduced, improving the safety of the vehicle 100.

[0043] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of this application.

Claims

1. A vehicle comprising: Battery module; A key start circuit, the key start circuit is connected to the battery module, and generates a first signal when the key start circuit is turned on; a body control module, the body control module being connected to the battery module and the key start circuit and receiving the first signal; an electronic control unit, the electronic control unit being connected to the body control module, and the body control module controlling the electronic control unit to start according to the first signal; It is characterized in that the vehicle also includes an anti-backflow circuit and a USB interface, the anti-backflow circuit is connected between the body control module and the USB interface, and is unidirectionally conductive from the common end of the key start circuit and the body control module to the USB interface, and the USB interface is used to connect an external device to transmit the energy of the battery module to the external device.

2. The vehicle according to claim 1, characterized in that The body control module includes a first end and a second end, the first end of the body control module is connected to the key start circuit, the second end of the body control module is connected to the electronic control unit, the first end is a low voltage input end, and the second end is a high voltage output end.

3. The vehicle according to claim 2, characterized in that The backflow prevention circuit is connected to a first end of the vehicle body control module.

4. The vehicle according to claim 2, characterized in that The vehicle further comprises an instrument and a lamp, wherein the electronic control unit, the instrument and the lamp are connected to the second end of the body control module.

5. The vehicle according to claim 1, characterized in that The anti-backflow circuit includes a first diode, an anode of the first diode is connected to a common end of the vehicle body control module and the key start circuit, and a cathode of the first diode is connected to the USB interface.

6. The vehicle according to claim 5, characterized in that The anti-backflow circuit also includes a second diode and a capacitor, the cathode of the second diode is connected to the cathode of the first diode, the anode of the second diode is grounded, and the capacitor is connected in parallel to both ends of the second diode.

7. The vehicle according to claim 1, characterized in that The anti-backflow circuit includes a switch tube, a control end of the switch tube is connected to a common end connected to the body control module and the key start circuit, a first end of the switch tube is connected to the USB interface, and a second end of the switch tube is grounded, wherein the first end of the switch tube is also connected to the common end connected to the body control module and the key start circuit to obtain current flowing through the USB interface.

8. The vehicle according to claim 7, characterized in that The switch tube is one of a triode, a MOS field effect transistor and an insulated gate bipolar transistor IGBT.

9. The vehicle according to claim 1, characterized in that The anti-backflow circuit and the USB interface are integrated into a USB power supply unit, and the USB power supply unit is detachably connected to the body control module.

10. The vehicle according to claim 1, characterized in that The anti-backflow circuit is integrated into the body control module, and the USB interface is detachably connected to the anti-backflow circuit.

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