A universal trailer hitch system

Abstract

The application relates to a general trailer coupler system, which comprises a central control module, a vehicle signal acquisition module and an external communication module; the central control module comprises a main control chip; the vehicle signal acquisition module comprises a CAN communication module, a CAN FD communication module, a LIN communication module and a voltage acquisition module; and the external communication module comprises an Ethernet module and a Bluetooth module. In terms of acquiring vehicle information, the CAN data, the CANFD data, the LIN data and the voltage signal of the vehicle can be acquired, the first three communication modes have basically covered the data types of all current vehicle models, and the voltage signal acquisition used later fundamentally ensures that the signal can be acquired when other modes cannot be used, thereby greatly improving the universality. The Ethernet module and the Bluetooth module are wirelessly connected with a mobile terminal, so that the system is remotely controlled by using an APP or a small program on the mobile terminal, and the working state and problem feedback of the coupler can be more intuitively acquired through the mobile terminal.

Description

Technical Field

[0001] This application relates to the field of vehicle electrical coupling technology, and more particularly to a universal trailer coupling system. Background Technology

[0002] Electrical connectors are used for connecting signal, power, and electrical control circuits. The electrical connection section of a complete electric trailer connector mainly serves to achieve the following connection functions: battery power supply lines, control signals, and communication signals.

[0003] Currently, vehicle electric couplings are controlled via buttons or a central control screen, resulting in a limited control method. Vehicle information is typically acquired through one or two of the following methods: CAN, CANFD, and LIN, leading to low versatility. Utility Model Content

[0004] To overcome, to some extent, the problems of limited control methods and low data acquisition versatility of electric trailer couplings in related technologies, this application provides a universal trailer coupling system.

[0005] The proposed solution is as follows:

[0006] A universal trailer coupling system includes:

[0007] Central control module, vehicle signal acquisition module, and external communication module;

[0008] The central control module includes: a main control chip;

[0009] The vehicle signal acquisition module includes: a CAN (Controller Area Network) communication module, a CAN FD (Controller Area Network Flexible Data-rate) communication module, a LIN (Local Interconnect Network) communication module, and a voltage acquisition module;

[0010] The external communication module includes: an Ethernet module and a Bluetooth module;

[0011] The CAN communication module connects the vehicle's CAN bus and the main control chip, and is used to obtain vehicle CAN data from the vehicle's CAN bus and send it to the main control chip.

[0012] The CAN FD communication module connects the vehicle's CAN FD bus and the main control chip, and is used to obtain vehicle CAN FD data from the vehicle's CAN FD bus and send it to the main control chip.

[0013] The LIN communication module connects the vehicle LIN bus and the main control chip, and is used to obtain vehicle LIN data from the vehicle LIN bus and send it to the main control chip.

[0014] The voltage acquisition module connects to each working module of the vehicle and the main control chip, and is used to collect voltage data from each working module of the vehicle and send it to the main control chip.

[0015] The Ethernet module is connected to the main control chip and wirelessly connected to the mobile terminal;

[0016] The Bluetooth module is connected to the main control chip and wirelessly connected to the mobile terminal.

[0017] Preferably, the central control module further includes:

[0018] Module diagnostic update interface;

[0019] The module diagnostic update interface is connected to the main control chip and is used to diagnose the module's operating status and update its firmware / software.

[0020] Preferably, the central control module further includes:

[0021] Flash memory chip;

[0022] The Flash memory chip is connected to the main control chip and is used to store data.

[0023] Preferably, it further includes:

[0024] Two sets of limit switches;

[0025] Two sets of limit switches are installed at the vehicle's trailer hitch, serving as a retraction limit switch and a release limit switch, respectively.

[0026] Both sets of limit switches are connected to the main control chip.

[0027] Preferably, it further includes:

[0028] System power button;

[0029] The system switch button is connected to the main control chip;

[0030] The system switch button is used to control the switching on and off of the universal trailer coupling system.

[0031] Preferably, it further includes:

[0032] Power supply module, repeater and external power supply control module;

[0033] The power module includes: vehicle ignition power supply, vehicle battery power supply and chip power supply circuit.

[0034] The external power supply control module includes: an external device power supply circuit, an external interface, and an external connection identification circuit;

[0035] The repeater connects the vehicle's ignition power supply, the vehicle's battery power supply, the power supply circuit for external devices, and the main control chip.

[0036] The chip power supply circuit is connected to the vehicle battery power supply and the main control chip;

[0037] The vehicle's battery power supply is connected to the main control chip;

[0038] The external interface connects to the power supply circuit of the external device, the external connection identification circuit, and the external device.

[0039] The external connection identification circuit is connected to the main control chip;

[0040] The vehicle ignition power supply and vehicle battery power supply provide power to external devices through repeaters, external device power supply circuits, and external interfaces.

[0041] Preferably, the external connection identification circuit includes:

[0042] An external switch identification circuit is used to collect switch signals from external interfaces;

[0043] An external current identification circuit is used to collect the power supply current signal of the power supply circuit of an external device.

[0044] Preferably, the external power supply control module further includes:

[0045] External interface indicator lights;

[0046] The external interface indicator light connects the external interface and the main control chip, and is used to indicate the working status of the external interface.

[0047] Preferably, it further includes:

[0048] Motor control module;

[0049] The motor control module includes: a motor forward and reverse bridge control circuit, a Hall effect monitoring circuit, and a current monitoring circuit;

[0050] The motor positive and negative bridge control circuit connects the vehicle motor and the main control chip, and is used to control the vehicle motor according to the instructions of the main control chip.

[0051] The Hall monitoring circuit connects the vehicle motor and the main control chip, and is used to collect the Hall signal of the vehicle motor and send it to the main control chip.

[0052] The current monitoring circuit connects the vehicle motor and the main control chip, and is used to collect the current signal of the vehicle motor and send it to the main control chip.

[0053] Preferably, it further includes:

[0054] Status indicator module;

[0055] The status indicator module is connected to the main control chip and is used to indicate the system's working status.

[0056] The technical solution provided in this application may include the following beneficial effects:

[0057] The universal trailer coupling system in this application includes: a central control module, a vehicle signal acquisition module, and an external communication module. The central control module includes: a main control chip; the vehicle signal acquisition module includes: a CAN communication module, a CAN FD communication module, a LIN communication module, and a voltage acquisition module; the external communication module includes: an Ethernet module and a Bluetooth module.

[0058] The CAN communication module connects the vehicle's CAN bus and the main control chip, and is used to acquire vehicle CAN data from the vehicle CAN bus and send it to the main control chip; the CAN FD communication module connects the vehicle's CAN FD bus and the main control chip, and is used to acquire vehicle CAN FD data from the vehicle CAN FD bus and send it to the main control chip; the LIN communication module connects the vehicle's LIN bus and the main control chip, and is used to acquire vehicle LIN data from the vehicle LIN bus and send it to the main control chip; the voltage acquisition module connects the vehicle's various working modules and the main control chip, and is used to acquire voltage data from the vehicle's various working modules and send it to the main control chip; the Ethernet module connects to the main control chip and wirelessly connects to the mobile terminal; the Bluetooth module connects to the main control chip and wirelessly connects to the mobile terminal.

[0059] In this system, for acquiring vehicle information, it supports the acquisition of CAN data, CANFD data, LIN data and voltage signals. The first three communication methods have basically covered the data types of all current vehicle models; the voltage signal acquisition used later ensures that the signal can be acquired when other methods cannot be used, which greatly improves versatility.

[0060] Furthermore, this system wirelessly connects to mobile terminals via Ethernet and Bluetooth modules, allowing remote control of the system using an app or mini-program on the mobile terminal. The mobile terminal also provides a more intuitive way to obtain the connector's working status and problem feedback.

[0061] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0062] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0063] Figure 1 This is a circuit diagram of a universal trailer coupling system provided in one embodiment of this application;

[0064] Figure 2 This is a circuit diagram of a general trailer coupling system provided in another embodiment of this application.

[0065] Figure labeling: Central control module-1; Main control chip-11; Module diagnostic update interface-12; Flash storage chip-13; Vehicle signal acquisition module-2; CAN communication module-21; CAN FD communication module-22; LIN communication module-23; Voltage acquisition module-24; External communication module-3; Ethernet module-31; Bluetooth module-32; Limit switch-4; System switch button-5; Power module-6; Vehicle ignition power supply-61; Vehicle battery power supply-62; Chip power supply circuit-63; Repeater-7; External power supply control module-8; External device power supply circuit-81; External interface-82; External switch identification circuit-83; External current identification circuit-84; External interface indicator light-85; Motor control module-9; Motor positive and negative bridge control circuit-91; Hall effect monitoring circuit-92; Current monitoring circuit-93; Status indicator module-10. Detailed Implementation

[0066] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0067] Example 1

[0068] A universal trailer coupling system includes:

[0069] Central control module 1, vehicle signal acquisition module 2, and external communication module 3;

[0070] Central control module 1 includes: main control chip 11;

[0071] The vehicle signal acquisition module 2 includes: a CAN communication module 21, a CAN FD communication module 22, a LIN communication module 23, and a voltage acquisition module 24;

[0072] External communication module 3 includes: Ethernet module 31 and Bluetooth module 32;

[0073] The CAN communication module 21 connects the vehicle CAN bus and the main control chip 11, and is used to obtain vehicle CAN data from the vehicle CAN bus and send it to the main control chip 11.

[0074] The CAN FD communication module 22 connects the vehicle's CAN FD bus and the main control chip 11, and is used to obtain vehicle CAN FD data from the vehicle's CAN FD bus and send it to the main control chip 11;

[0075] The LIN communication module 23 connects the vehicle LIN bus and the main control chip 11, and is used to obtain vehicle LIN data from the vehicle LIN bus and send it to the main control chip 11.

[0076] The voltage acquisition module 24 is connected to each working module of the vehicle and the main control chip 11. It is used to acquire the voltage data of each working module of the vehicle and send it to the main control chip 11.

[0077] Ethernet module 31 connects to main control chip 11 and wirelessly connects to mobile terminal;

[0078] Bluetooth module 32 connects to main control chip 11 and wirelessly connects to mobile terminal.

[0079] The central control module 1, as the core control unit, contains the main control chip 11, which is used to centrally process various acquisition and control commands.

[0080] Vehicle signal acquisition module 2: Includes multiple vehicle bus interfaces and voltage acquisition functions.

[0081] CAN communication module 21: Acquires CAN bus data;

[0082] CAN FD communication module 22: Acquires higher-speed CAN FD bus data;

[0083] LIN communication module 23: Acquires low-speed LIN bus data;

[0084] Voltage acquisition module 24: Acquires voltage data from each working module of the trailer;

[0085] Ethernet module 31 and Bluetooth module 32: provide different external communication capabilities to connect to mobile terminals (such as mobile phones, tablets, etc.).

[0086] Each vehicle bus module is connected to the corresponding vehicle bus and the main control chip 11 to realize the acquisition and forwarding of bus data; the voltage acquisition module 24 collects the power supply status of different working modules; the Ethernet and Bluetooth modules 32 are both connected to the main control chip 11 and also connected to the mobile terminal, which is used for interactive functions such as parameter configuration, status monitoring and remote control.

[0087] In this system, for acquiring vehicle information, it supports the acquisition of CAN data, CANFD data, LIN data and voltage signals. The first three communication methods have basically covered the data types of all current vehicle models; the voltage signal acquisition used later ensures that the signal can be acquired when other methods cannot be used, which greatly improves versatility.

[0088] Furthermore, this system wirelessly connects to a mobile terminal via Ethernet module 31 and Bluetooth module 32, enabling remote control of the system using an APP or mini-program on the mobile terminal. The mobile terminal also allows for more intuitive access to the connector's working status and problem feedback.

[0089] It should be noted that the central control module 1 also includes:

[0090] Module diagnostic update interface 12;

[0091] The module diagnostic update interface 12 is connected to the main control chip 11 and is used to diagnose the module's operating status and update its firmware / software.

[0092] This embodiment adds a new module structure: Module Diagnosis and Update Interface 12. This interface is connected to the main control chip 11 and its functions include: diagnosing the operating status of each module of the system (such as power status, communication status, signal reception status, etc.); and updating the firmware or software of each module to support system maintenance and version upgrades.

[0093] This interface can communicate with external devices via wired means (such as USB, serial port, JTAG) or wireless means (such as OTA upgrade), thereby enabling remote diagnosis and program upgrade of the main control chip 11 or other key modules in the trailer coupling system.

[0094] It should be noted that the central control module 1 also includes:

[0095] Flash memory chip 13;

[0096] Flash memory chip 13 is connected to main control chip 11 and is used to store data.

[0097] In this embodiment, a storage element, namely a Flash memory chip 13, is further added to the central control module 1. The Flash memory chip 13 is a non-volatile memory that can retain data even when the system is powered off; this chip is connected to the main control chip 11 and is used to store the data generated or received by the main control chip 11.

[0098] The Flash memory chip 13 may be used to store data including but not limited to: system logs, operating status, fault information; communication data (such as raw or processed data transmitted via CAN, LIN, or Bluetooth); control strategy parameters, configuration information; firmware code and version files for upgrades, etc.

[0099] Example 2

[0100] The universal trailer coupling system also includes:

[0101] Two sets of limit switches 4;

[0102] Two sets of limit switches 4 are installed at the trailer hitch of the vehicle, serving as the retraction limit switch 4 and the release limit switch 4 respectively;

[0103] Both sets of limit switches 4 are connected to the main control chip 11.

[0104] In this embodiment, two sets of limit switches 4 are added to the original system; the limit switches 4 are specifically installed at the trailer hook part, that is, on the movement path of the electric hook actuator.

[0105] The system includes: one set of retraction limit switches 4, used to detect whether the hook has been fully retracted; and one set of release limit switches 4, used to detect whether the hook has been fully released (connected state). Both sets of limit switches 4 are connected to the main control chip 11, which reads their switch status in real time and controls the motor or determines the current position status of the hook accordingly.

[0106] By using two clear limit signals to retract / release the trailer hook, the system can accurately identify whether the trailer hook is in place, avoiding unhooking accidents or interference damage caused by the hook not being fully released or retracted. As a redundant protection measure, the limit switch 4 can form a dual judgment mechanism with the motor position estimation / Hall signal to improve system stability.

[0107] Example 3

[0108] It should be noted that the universal trailer coupling system also includes:

[0109] System switch button 5;

[0110] System switch button 5 is connected to main control chip 11;

[0111] System switch button 5 is used to control the switching on / off of the universal trailer coupling system.

[0112] This embodiment introduces a user interaction component, namely system switch button 5, which is used by the user to directly turn the trailer coupling system on or off.

[0113] The system switch button 5 is directly connected to the main control chip 11 to realize the control signal input, which can control the power-on status of the entire system or the software startup / sleep status of the main control module.

[0114] Example 4

[0115] It should be noted that the universal trailer coupling system also includes:

[0116] Power module 6, repeater 7 and external power supply control module 8;

[0117] The power module 6 includes: vehicle ignition power supply 61, vehicle battery power supply 62, and chip power supply circuit 63;

[0118] The external power supply control module includes: an external device power supply circuit 81, an external interface 82, and an external connection identification circuit;

[0119] Repeater 7 connects the vehicle ignition power supply 61, the vehicle battery power supply 62, the external device power supply circuit 81, and the main control chip 11.

[0120] The chip power supply circuit 63 connects the vehicle battery power supply 62 and the main control chip 11;

[0121] The vehicle battery power supply 62 is connected to the main control chip 11;

[0122] External interface 82 connects to external device power supply circuit 81, external connection identification circuit and external device;

[0123] The external connection identification circuit is connected to the main control chip 11;

[0124] The vehicle ignition power supply 61 and the vehicle battery power supply 62 supply power to external devices through the repeater 7, the external device power supply circuit 81 and the external interface 82.

[0125] It should be noted that the vehicle ignition power supply 61 only supplies power when the vehicle is running; the vehicle battery power supply 62 serves as a constant power supply. The chip power supply circuit 63: regulated the battery voltage before supplying it to the main control chip 11, ensuring the continuous operation of the main control chip 11.

[0126] External device power supply circuit 81: Used to supply power to external devices (such as lamps, electric mechanisms).

[0127] External Interface 82: This is a physical connection port for inserting external devices.

[0128] External connection identification circuit: used to identify whether there is an external device connected and send the connection status signal to the main control chip 11.

[0129] Repeater 7 plays a role in power control and distribution, managing the power supply path from the vehicle power supply to the main control chip 11 and external devices.

[0130] This embodiment supports multiple power sources to ensure stable system operation. By distinguishing between ignition power and battery power, the system can switch between different power supply paths according to the vehicle status: the ignition power drives high-power loads; the battery power maintains the low-power operation of the main control chip 11.

[0131] As an intelligent switch controller, repeater 7 can be controlled to turn on and off through the main control chip 11, realizing functions such as power zone control, power consumption management, and remote power-off; it is conducive to centralized management of vehicle power resources and reduces voltage interference or potential conflicts when multiple sources are shared.

[0132] The external device power supply circuit 81 works in conjunction with the external interface 82 to adapt to various types of attached terminals, such as cameras, electric latches, and lighting modules.

[0133] Furthermore, the external connection identification circuit includes:

[0134] The external switch identification circuit 83 is used to collect the switch signals of the external interface 82;

[0135] The external current identification circuit 84 is used to collect the power supply current signal of the external device power supply circuit 81.

[0136] The external switch identification circuit 83 is used to detect whether a device is connected to the external interface 82. It can determine whether "a device is connected" by reading the interface pin status, signal bit, voltage change or switch contact conduction status. The signal result is reported to the main control chip 11 as the basis for linkage control.

[0137] The external current identification circuit 84 is used to collect the current of the power supply line of the external device in real time; it can determine whether the working status and load characteristics of the external device are abnormal (such as overload, no load, short circuit, etc.); the current value serves as the basis for judging the power supply status of the system, abnormal protection, or status indication.

[0138] Furthermore, the external power supply control module 8 also includes:

[0139] External interface indicator light 85;

[0140] The external interface indicator light 85 is connected to the external interface 82 and the main control chip 11, and is used to indicate the working status of the external interface 82.

[0141] The external switch identification circuit 83 can accurately determine whether a device is inserted or removed. Based on this, the system can achieve: automatic power supply / power off; dynamic identification of device type; and enabling / disabling of certain communication protocols or control commands.

[0142] The external current identification circuit 84 can monitor the load current in real time. If it detects:

[0143] Overload current can trigger protection or power outage;

[0144] A continuous 0 current indicates that the device is not working or the circuit is broken.

[0145] The external interface indicator 85 (such as an LED indicator) is used to visually display the current working status of the external interface 82. It is connected to the external interface 82 (logically reflecting its status) and also connected to the main control chip 11 (to realize the coordination of control logic and indication).

[0146] The triggering conditions for the indicator light status can include:

[0147] Is external interface 82 connected to a device?

[0148] Is the external power supply circuit connected?

[0149] Is the external device working properly or is there an abnormal current?

[0150] Whether the main control chip 11 has enabled the corresponding function / communication status.

[0151] Example 5

[0152] It should be noted that the universal trailer coupling system also includes:

[0153] Motor control module 9;

[0154] The motor control module 9 includes: a motor forward and reverse bridge control circuit 91, a Hall effect monitoring circuit 92, and a current monitoring circuit 93;

[0155] The motor positive and negative bridge control circuit 91 connects the vehicle motor and the main control chip 11, and is used to control the vehicle motor according to the instructions of the main control chip 11.

[0156] The Hall monitoring circuit 92 connects the vehicle motor and the main control chip 11, and is used to collect the Hall signal of the vehicle motor and send it to the main control chip 11;

[0157] The current monitoring circuit 93 is connected to the vehicle motor and the main control chip 11, and is used to collect the current signal of the vehicle motor and send it to the main control chip 11.

[0158] The motor forward / reverse bridge control circuit 91 is based on an H-bridge or bidirectional MOSFET bridge structure. It executes actions according to the control commands issued by the main control chip 11 to control the "forward / reverse" direction of the motor.

[0159] The Hall monitoring circuit 92 collects signals from the motor's internal or additional Hall elements to sense changes in the motor's actual speed, direction, or position. The Hall signals are fed back to the main control chip 11 for closed-loop control and status judgment.

[0160] The current monitoring circuit 93 collects the current changes of the motor in real time during operation to determine the working load status of the motor (such as stall, overload, no load). The monitoring data is fed back to the main control chip 11, supporting abnormal protection, energy consumption control and fine motion recognition.

[0161] Example 6

[0162] It should be noted that the universal trailer coupling system also includes:

[0163] Status indicator module 10;

[0164] The status indicator module 10 is connected to the main control chip 11 and is used to indicate the system's working status.

[0165] Status indicator module 10: It is usually composed of one or more LEDs, graphical indicators, LCD screens, buzzers, etc. It is connected to the main control chip 11 and is used to display the current system status based on the operation judgment results of the main control chip 11.

[0166] The feedback on the system's operating status may include:

[0167] Is the system powered on / running normally?

[0168] Are there any abnormal faults (such as current overload, limit switch not triggered, communication interruption, etc.)?

[0169] Whether the control command is being executed;

[0170] Is the connector ready to connect / retractable?

[0171] Whether the remote communication connection was successful, etc.

[0172] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0173] It should be noted that in the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means at least two.

[0174] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0175] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A universal trailer coupling system, characterized in that, include: Central control module, vehicle signal acquisition module, and external communication module; The central control module includes: a main control chip; The vehicle signal acquisition module includes: a CAN communication module, a CAN FD communication module, a LIN communication module, and a voltage acquisition module; The external communication module includes: an Ethernet module and a Bluetooth module; The CAN communication module connects the vehicle's CAN bus and the main control chip, and is used to obtain vehicle CAN data from the vehicle's CAN bus and send it to the main control chip. The CAN FD communication module connects the vehicle's CAN FD bus and the main control chip, and is used to obtain vehicle CAN FD data from the vehicle's CAN FD bus and send it to the main control chip. The LIN communication module connects the vehicle LIN bus and the main control chip, and is used to obtain vehicle LIN data from the vehicle LIN bus and send it to the main control chip. The voltage acquisition module connects to each working module of the vehicle and the main control chip, and is used to collect voltage data from each working module of the vehicle and send it to the main control chip. The Ethernet module is connected to the main control chip and wirelessly connected to the mobile terminal; The Bluetooth module is connected to the main control chip and wirelessly connected to the mobile terminal.

2. The universal trailer coupling system according to claim 1, characterized in that, The central control module also includes: Module diagnostic update interface; The module diagnostic update interface is connected to the main control chip and is used to diagnose the module's operating status and update its firmware / software.

3. The universal trailer coupling system according to claim 1, characterized in that, The central control module also includes: Flash memory chip; The Flash memory chip is connected to the main control chip and is used to store data.

4. The universal trailer coupling system according to claim 1, characterized in that, Also includes: Two sets of limit switches; Two sets of limit switches are installed at the vehicle's trailer hitch, serving as a retraction limit switch and a release limit switch, respectively. Both sets of limit switches are connected to the main control chip.

5. The universal trailer coupling system according to claim 1, characterized in that, Also includes: System power button; The system switch button is connected to the main control chip; The system switch button is used to control the switching on and off of the universal trailer coupling system.

6. The universal trailer coupling system according to claim 1, characterized in that, Also includes: Power supply module, repeater and external power supply control module; The power module includes: vehicle ignition power supply, vehicle battery power supply and chip power supply circuit. The external power supply control module includes: an external device power supply circuit, an external interface, and an external connection identification circuit; The repeater connects the vehicle's ignition power supply, the vehicle's battery power supply, the power supply circuit for external devices, and the main control chip. The chip power supply circuit is connected to the vehicle battery power supply and the main control chip; The vehicle's battery power supply is connected to the main control chip; The external interface connects to the power supply circuit of the external device, the external connection identification circuit, and the external device. The external connection identification circuit is connected to the main control chip; The vehicle ignition power supply and vehicle battery power supply provide power to external devices through repeaters, external device power supply circuits, and external interfaces.

7. The universal trailer coupling system according to claim 6, characterized in that, The external connection identification circuit includes: An external switch identification circuit is used to collect switch signals from external interfaces; An external current identification circuit is used to collect the power supply current signal of the power supply circuit of an external device.

8. The universal trailer coupling system according to claim 6, characterized in that, The external power supply control module also includes: External interface indicator lights; The external interface indicator light connects the external interface and the main control chip, and is used to indicate the working status of the external interface.

9. The universal trailer coupling system according to claim 1, characterized in that, Also includes: Motor control module; The motor control module includes: a motor forward and reverse bridge control circuit, a Hall effect monitoring circuit, and a current monitoring circuit; The motor positive and negative bridge control circuit connects the vehicle motor and the main control chip, and is used to control the vehicle motor according to the instructions of the main control chip. The Hall monitoring circuit connects the vehicle motor and the main control chip, and is used to collect the Hall signal of the vehicle motor and send it to the main control chip. The current monitoring circuit connects the vehicle motor and the main control chip, and is used to collect the current signal of the vehicle motor and send it to the main control chip.

10. The universal trailer coupling system according to claim 1, characterized in that, Also includes: Status indicator module; The status indicator module is connected to the main control chip and is used to indicate the system's working status.

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