A new energy heavy truck external power sharing control method for board car delivery

Abstract

The present application relates to the field of new energy heavy truck delivery logistics, and more particularly to a new energy heavy truck external power sharing control method for flatbed delivery, comprising: obtaining a sharing operation instruction or a sharing exit instruction input by a driver through a human-computer interaction module; based on the sharing operation instruction, a control unit performs a self-check, and when the self-check result meets the sharing entry condition, performs power sharing entry control, including: controlling the flatbed to perform high-voltage power-off, closing the high-voltage relay of the power sharing switching unit, controlling the to-be-delivered vehicle owner negative relay to be closed, and completing the remaining high-voltage power-on work, and establishing a sharing mode in which the to-be-delivered vehicle power battery supplies power to the flatbed high-voltage load; based on the sharing exit instruction, performing power sharing exit control. The present application does not need to modify the original high-low voltage topology of the vehicle, does not need DC / DC conversion, is flexible to deploy, and is easy to operate.

Description

Technical Field

[0001] This application relates to the field of logistics technology for the dispatch of new energy heavy trucks, and in particular to an external power sharing control method for dispatching new energy heavy trucks using flatbed trucks. Background Technology

[0002] During the shipment of new energy heavy-duty trucks, flatbed trucks are typically used to transport them to their destination. Due to the long shipping distances, the high-voltage loads on the flatbed trucks consume electrical energy, but the capacity of the power batteries carried by the flatbed trucks is limited. Prolonged transport may lead to insufficient power, affecting transportation efficiency and safety. Meanwhile, the power batteries of the trucks being shipped are usually idle during the shipment period. If the power of the trucks being shipped could be shared with the flatbed trucks, the problem of insufficient power on the flatbed trucks could be effectively solved.

[0003] Most existing V2V power sharing solutions for mother-daughter vehicles require modifications or additions to the high-voltage electrical system on the vehicle side, such as adding bidirectional DC / DC converter modules or altering the existing high-voltage topology. These solutions have the following drawbacks: First, the vehicle modification costs are high, making widespread adoption difficult, and they cannot be applied to existing vehicles already sold or in operation. Second, they lack portability, failing to function as mobile, shareable independent devices that can be flexibly deployed across different flatbed truck shipment batches. Third, the control logic is complex, requiring customized adaptation for different vehicle models, resulting in poor versatility.

[0004] Therefore, there is an urgent need for a control method that can achieve power sharing between the flatbed truck and the dispatched vehicle without changing the existing high and low voltage topology of the vehicle, through an external independent device, so as to meet the needs of safe, convenient and plug-and-play power replenishment in the flatbed truck dispatch scenario. Summary of the Invention

[0005] The purpose of this invention is to provide an external power sharing control method for new energy heavy trucks shipped by flatbed truck, so as to solve the technical problems of existing V2V power sharing methods, which require modification of the vehicle's high-voltage system, are costly, and cannot flexibly allocate power across batches.

[0006] This invention provides the following solution: A method for controlling the external power sharing of new energy heavy-duty trucks for flatbed truck shipment includes: Obtain the driver's input of a shared operation command or a shared exit command; Based on the shared operation command, the control unit performs a status self-check, and when the status self-check result meets the shared entry conditions, it performs power sharing entry control processing to establish a shared mode in which the power battery of the dispatched vehicle supplies power to the high-voltage load of the flatbed truck; wherein, the power sharing entry control processing includes: controlling the flatbed truck to power off the high voltage, closing the high-voltage relay of the power sharing switching unit, controlling the main negative relay of the dispatched vehicle to close, and completing the remaining high-voltage power-on work. Based on the shared exit command, the control unit performs power sharing exit control processing to exit the shared mode; wherein, the power sharing exit control processing includes: controlling the flatbed car to de-energize, disconnecting the high-voltage relay of the power sharing switching unit, controlling the high-voltage accessories of the dispatched car to de-energize, and disconnecting the main negative relay of the dispatched car.

[0007] Furthermore, the step of obtaining the driver's input sharing operation command or sharing exit command includes: Receives operation signals from the driver regarding the switching button; The operation signal is subjected to debouncing and validity verification. When the verification passes, the shared operation instruction or the shared exit instruction is generated.

[0008] Furthermore, the control unit performs a status self-check, including: The connection status between the first high and low voltage interface of the external power sharing device and the high and low voltage interface of the transport vehicle, as well as the connection status between the second high and low voltage interface and the high and low voltage interface of the flatbed vehicle, are detected. Detect whether there are short circuit faults, insulation faults, overvoltage or undervoltage in the high voltage circuits of the power sharing switching unit, the dispatched vehicle and the flatbed car; When the connection status is normal and the high-voltage circuit is fault-free, the self-test result of the status is determined to meet the shared entry condition.

[0009] Furthermore, the power sharing entry control process includes: The control unit wakes up the ON position of the dispatched vehicle, causing the relevant controllers of the dispatched vehicle to perform a power-on self-test; The control unit simulates the BMS request for a power-down command via CAN signal, and the HCU of the flatbed truck executes the high-voltage power-down according to the power-down procedure until the main negative relay of the flatbed truck is disconnected. After the main negative relay of the flatbed truck is disconnected, the control unit controls the positive and negative relays in the power sharing switching unit to be energized; The control unit sends a command to the main negative relay of the dispatched vehicle to engage. The BMS or HCU of the dispatched vehicle controls the main negative relay of the dispatched vehicle to perform a pre-check and engage after the pre-check is passed, so that the power battery of the dispatched vehicle supplies power to the high voltage load of the flatbed truck. The control unit routes the BMS signal of the dispatch vehicle to the CAN network of the flatbed truck via signal forwarding. The control unit completes the remaining high-voltage power-on operation.

[0010] Furthermore, the completion of the remaining high-voltage power-on work includes: The HCU of the flatbed truck controls the relays of the flatbed truck accessories to engage, completing the high-voltage power-on process for the flatbed truck accessories; after the flatbed truck key door is in the Start position, the HCU of the flatbed truck closes the main positive relay of the flatbed truck, enabling the flatbed truck motor; After the main negative relay of the dispatched vehicle is closed, the HCU of the dispatched vehicle closes the accessory relay of the dispatched vehicle, completing the high voltage power-on process of the accessories of the dispatched vehicle. The HCU of the dispatched vehicle then sends a thermal management control enable signal to enable the thermal management system of the dispatched vehicle to work.

[0011] Furthermore, the power sharing exit control process includes: The control unit sends a simulated request to the flatbed truck to disconnect the main negative relay, and the flatbed truck executes the high-voltage power-off process. After the high voltage of the flatbed truck is de-energized, the control unit sends a simulated request to the dispatched vehicle to disconnect the main negative relay, and the dispatched vehicle executes the high voltage de-energization process. After the high voltage of the transport vehicle is de-energized, the control unit controls the positive and negative relays in the power sharing switching unit to disconnect. After the high-voltage accessory relays of both the flatbed car and the dispatched car are disconnected, and the control unit has sent a request to disconnect the main negative relay of the dispatched car, the control unit controls the main negative relay of the dispatched car to disconnect. The control unit disconnects the wake-up power of the power sharing switching unit and the ON position power of the dispatched vehicle, causing the relevant controllers to enter sleep mode.

[0012] Furthermore, the power sharing exit control process also includes: After both the positive and negative relays in the power sharing switching unit are disconnected, the control unit stops sending the main negative relay disconnection request to the flatbed vehicle simulation. If the flatbed truck requires high-voltage power-on, the flatbed truck will continue to execute the high-voltage power-on procedure.

[0013] Furthermore, the control unit sends at least one of the following states—shared standby, shared in progress, shared out, and fault—to the flatbed vehicle instrument panel for display via CAN signal.

[0014] Furthermore, the control unit controls the positive and negative relays in the power sharing switching unit to engage, including: After confirming that the main negative relay of the flatbed truck is disconnected, control the positive relay and the negative relay to directly engage; The power battery of the transport vehicle is directly electrically connected to the high-voltage load of the flatbed truck through the positive and negative relays, without going through the bidirectional DC / DC converter module, and the positive and negative relays are not pre-charged before being engaged.

[0015] Furthermore, when the self-test result does not meet the shared entry condition, the control unit remains in standby mode and sends fault status information to the vehicle instrument via CAN signal; When a preset fault is detected during operation in shared mode, the control unit executes the power sharing exit control process and sends fault status information to the flatbed vehicle's instrument panel via a CAN signal. This solution achieves the following beneficial technical effects: By acquiring the driver's input sharing operation command or sharing exit command, the control unit automatically executes control steps such as status self-check, high-voltage power-off, relay switching, and high-voltage power-on, realizing the establishment and exit of the shared mode where the power battery of the transport vehicle supplies power to the high-voltage load of the flatbed vehicle. The entire process requires no modification to the vehicle's original high and low voltage topology, no use of a bidirectional DC / DC converter module, good control logic versatility, simple operation, and high degree of automation, effectively meeting the safe, convenient, and plug-and-play power replenishment needs in flatbed vehicle transport scenarios. Attached Figure Description

[0016] Figure 1 A flowchart of an external power sharing control method for new energy heavy trucks used for flatbed truck dispatch according to an embodiment of the present invention is shown; Figure 2 A flowchart of the power sharing entry control process according to an embodiment of the present invention is shown; Figure 3 A flowchart of the power sharing exit control process according to an embodiment of the present invention is shown. Detailed Implementation

[0017] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] This invention provides an external power sharing control method for new energy heavy-duty trucks used in flatbed truck dispatch, applied to an external power sharing device. This external power sharing device is a portable external structure independent of both the dispatched vehicle and the flatbed truck, including a control unit, a power sharing switching unit, and a human-machine interface module. The control unit is an automotive-grade microcontroller with multiple CAN communication interfaces for executing switching control logic. The power sharing switching unit includes positive and negative relays for switching the high-voltage circuit between the dispatched vehicle and the flatbed truck. The human-machine interface module has at least one switching button for receiving driver operation commands. The external power sharing device also has a first high-low voltage interface and a second high-low voltage interface, respectively for pluggable connection via high-low voltage cables to the high-low voltage interfaces of the dispatched vehicle and the flatbed truck. The status display function reuses the flatbed truck's instrument panel; the control unit sends the sharing status to the flatbed truck's instrument panel for display via CAN signals.

[0019] Reference Figure 1 The method includes steps S101 to S103.

[0020] Step S101: Obtain the driver's input of a shared operation command or a shared exit command.

[0021] Specifically, after the driver presses the switch button on the human-machine interface module, the control unit receives the button operation signal and generates a shared operation command or a shared exit command based on the button type.

[0022] In step S102, in response to the sharing operation command, the control unit performs a status self-check, and when the status self-check result meets the sharing entry conditions, it performs power sharing entry control processing.

[0023] Specifically, after receiving the shared operation command, the control unit performs a status self-check. The status self-check includes detecting the connection status between the first high and low voltage interface and the high and low voltage interface of the dispatched vehicle, and the connection status between the second high and low voltage interface and the high and low voltage interface of the flatbed vehicle. The connection status can be determined by the interface plug-in signal or the CAN communication handshake signal.

[0024] The self-check also includes detecting whether there are short-circuit faults, insulation faults, overvoltages, or undervoltages in the high-voltage circuits of the power sharing switching unit, the dispatched vehicle, and the flatbed truck. In one specific embodiment, this can be determined by reading the battery status messages sent by the dispatched vehicle's BMS and the flatbed truck's BMS, as well as the status feedback signals of the relays inside the switching unit. In an exemplary embodiment, for a power battery system with a rated voltage of 614V, the normal operating voltage range can be preset to 500V to 750V, and the insulation resistance safety threshold is 500Ω / V. The control unit compares the read battery voltage with 500V to 750V. If the voltage is lower than 500V, it is determined to be undervoltage; if the voltage is higher than 750V, it is determined to be overvoltage. The control unit compares the read insulation resistance with 500Ω / V. If the insulation resistance is lower than 500Ω / V, it is determined to be an insulation fault. For the switching unit relay, if the control unit does not receive a closing feedback signal within 100ms after issuing a closing command, or does not receive a disconnection feedback signal within 100ms after issuing a disconnection command, it is determined to be a relay fault.

[0025] When the connection is normal and the high-voltage circuit is fault-free, the self-test result is determined to meet the power sharing entry conditions, and the control unit begins to execute the power sharing entry control process. When the self-test result does not meet the power sharing entry conditions, the control unit remains in standby mode and sends fault status information to the vehicle's instrument panel via a CAN signal.

[0026] Reference Figure 2 The power sharing control process includes the following steps: Step S1021: The control unit wakes up the ON position of the dispatched vehicle, causing the relevant controllers of the dispatched vehicle to perform a power-on self-test.

[0027] Specifically, the control unit wakes up the HCU and BMS of the dispatched vehicle by outputting a wake-up signal or sending a CAN network management message. After the HCU and BMS of the dispatched vehicle are powered on, they perform self-tests.

[0028] In step S1022, the control unit simulates the BMS request for a power-down command via the CAN signal, and the HCU on the flatbed truck executes the high-voltage power-down according to the power-down procedure.

[0029] Specifically, the control unit, acting as a network node of the flatbed vehicle's BMS, sends a power-down request message to the flatbed vehicle's HCU on the flatbed vehicle's CAN network. Upon receiving this message, the flatbed vehicle's HCU executes the power-down procedure according to the original high-voltage power-down process, including disconnecting the flatbed vehicle's main positive relay, accessory relays, and main negative relay, and shutting down the relevant high-voltage accessories. The control unit confirms that the main negative relay has been disconnected by monitoring the flatbed vehicle's CAN network status messages.

[0030] It is worth noting that, in order to avoid message conflicts with the original BMS of the flatbed vehicle, the control unit can first put the flatbed vehicle BMS into a sleep state, or block the flatbed vehicle BMS messages through the CAN gateway, and then send a power-down request message as the network node of the flatbed vehicle BMS.

[0031] In step S1023, after the main negative relay of the flatbed truck is disconnected, the control unit controls the positive and negative relays in the power sharing switching unit to be energized.

[0032] Specifically, since the flatbed truck has been energized, there is no abnormal current in the high-voltage circuit, and the positive and negative relays can be directly engaged without pre-charging. The control unit applies a drive voltage to the control coils of the positive and negative relays through the digital output interface, causing the relay contacts to close and connecting the high-voltage positive and negative circuits.

[0033] In step S1024, the control unit sends a command to engage the main negative relay of the vehicle being shipped. The main negative relay of the vehicle being shipped first performs a pre-check. After the pre-check is passed, it engages, enabling the power battery of the vehicle being shipped to supply power to the flatbed truck.

[0034] Specifically, the control unit sends a command to the main negative relay of the dispatched vehicle to engage via the CAN network. Upon receiving this command, the dispatched vehicle's HCU initiates a pre-check by the dispatched vehicle's BMS, detecting the battery voltage, insulation resistance, and high-voltage circuit short-circuit status. In an exemplary embodiment, the preset thresholds for the pre-check can be: battery voltage within 85% to 115% of the rated voltage (e.g., 522V to 706V for a rated 614V), insulation resistance greater than 500Ω / V, and high-voltage circuit insulation monitoring current less than 10mA. When all parameters meet the preset thresholds, the dispatched vehicle's BMS sends a pre-check pass message to the control unit. Upon receiving the pre-check pass message, the control unit controls the main negative relay of the dispatched vehicle to engage. These thresholds are illustrative and can be adjusted according to the specific vehicle platform in actual applications. The dispatched vehicle's battery is then formally connected to the high-voltage circuit, beginning to supply power to the high-voltage load of the flatbed truck. If the pre-check fails, the control unit terminates the shared entry process and sends fault status information to the flatbed truck's instrument panel via CAN signal.

[0035] In step S1025, the control unit routes the BMS signal of the dispatch vehicle to the CAN network of the flatbed truck via signal forwarding.

[0036] Specifically, the control unit receives CAN messages from the BMS of the transport vehicle, including remaining battery power, voltage, current, temperature, SOC, fault codes, etc., and repackages these messages according to the message format and network management rules of the flatbed CAN network before sending them to the flatbed CAN network.

[0037] Step S1026: Complete the remaining high-voltage power-on work.

[0038] Specifically, on the flatbed truck side, the flatbed truck HCU controls the flatbed truck accessory relays to engage, completing the high-voltage power-on process for the flatbed truck accessories. After the flatbed truck key is in the Start position, the flatbed truck HCU closes the flatbed truck main positive relay, enabling the flatbed truck motor. On the dispatched vehicle side, after the dispatched vehicle's main negative relay is closed, the dispatched vehicle HCU closes the dispatched vehicle accessory relays, completing the high-voltage power-on process for the dispatched vehicle accessories. The dispatched vehicle HCU then sends a thermal management control enable signal, activating the dispatched vehicle's thermal management system. At this point, the shared mode is established. During shared mode operation, the control unit continuously monitors the status of the power battery of the dispatched vehicle, the high-voltage load status of the flatbed truck, and the status of the switching unit relay. It then sends at least one of the following statuses—shared standby, shared in progress, shared out, and fault—to the flatbed truck's instrument panel via CAN signal for display. If the driver presses the shared entry button again, the control unit ignores this operation and only responds to the shared exit button. To re-enter shared mode, the driver must first complete the exit process before re-initiating the shared entry request.

[0039] In step S103, in response to the power sharing exit command, the control unit performs power sharing exit control processing.

[0040] Reference Figure 3 The process of exiting power sharing control includes the following steps: In step S1031, the control unit sends a request to the flatbed vehicle to disconnect the main negative relay, and the flatbed vehicle executes the high-voltage power-off procedure.

[0041] Specifically, the control unit simulates sending a request message to disconnect the main negative relay on the flatbed truck's CAN network. Upon receiving this message, the flatbed truck's HCU executes the power-down procedure according to the original high-voltage power-down process, including disconnecting the main positive relay, the auxiliary relays, and the main negative relay. The control unit confirms the completion of the high-voltage power-down by monitoring the status messages on the flatbed truck's CAN network.

[0042] Step S1032: After the high voltage of the flatbed truck is de-energized, the control unit sends a simulated request to the dispatched vehicle to disconnect the main negative relay, and the dispatched vehicle executes the high voltage de-energization process.

[0043] Specifically, the control unit simulates sending a request message to disconnect the main negative relay on the CAN network of the vehicle being shipped. Upon receiving the message, the HCU of the vehicle being shipped executes the power-off procedure according to the original high-voltage power-off process of the vehicle being shipped, disconnecting the accessory relays of the vehicle being shipped; the main negative relay of the vehicle being shipped remains closed, waiting for subsequent instructions from the control unit.

[0044] Step S1033: After the high voltage of the dispatched vehicle is de-energized, the control unit controls the positive and negative relays in the power sharing switching unit to disconnect.

[0045] Specifically, since both the flatbed car and the dispatched car have been energized, there is no current in the high-voltage circuit. The control unit safely disconnects the positive and negative relays, cutting off the high-voltage circuit between the dispatched car and the flatbed car.

[0046] Step S1034: After the high-voltage accessory relays of both the flatbed car and the dispatched car are disconnected, and the control unit has sent a request to disconnect the main negative relay of the dispatched car, the control unit controls the main negative relay of the dispatched car to disconnect.

[0047] Specifically, after confirming that the high-voltage accessory relays of both the flatbed truck and the dispatched vehicle have been disconnected, and that it has sent a request to the dispatched vehicle to disconnect the main negative relay, the control unit controls the dispatched vehicle's main negative relay to disconnect, thereby completely isolating the dispatched vehicle's power battery from the high-voltage circuit.

[0048] In step S1035, the control unit disconnects the wake-up power of the power sharing switching unit and the ON position power of the dispatched vehicle, causing the relevant controllers to enter sleep mode.

[0049] Specifically, the control unit disconnects the wake-up signal line and the ON position power, and the relevant controllers of the dispatch vehicle and the switching unit enter a sleep state to reduce static power consumption.

[0050] In step S1036, after both the positive and negative relays in the power sharing switching unit are disconnected, the control unit stops sending the main negative relay disconnection request to the flatbed vehicle. If the flatbed vehicle has a high-voltage power-on requirement, the flatbed vehicle continues to execute the high-voltage power-on process.

[0051] Specifically, after the positive and negative relays are disconnected, the high-voltage circuit between the flatbed truck and the dispatched vehicle is completely isolated. The control unit stops simulating the sending of the main negative relay disconnection request, and the flatbed truck HCU can autonomously decide whether to re-energize the high voltage based on the flatbed truck's own control logic and driving requirements. During the operation of the shared mode, when the control unit detects a preset fault, this embodiment does not specifically limit the setting of the preset fault. Those skilled in the art can set it freely according to their needs, such as "overheating, overcurrent, insulation fault of the power battery of the dispatched vehicle, interruption of CAN communication, sticking of the switching unit relay", etc. The control unit immediately performs the power sharing exit control process and sends the fault status information to the flatbed vehicle instrument through the CAN signal.

[0052] Through the above embodiments, the present invention realizes the automatic establishment and exit of the shared mode of power supply from the power battery of the dispatched vehicle to the high-voltage load of the flatbed truck. It does not require modification of the original high and low voltage topology of the vehicle, nor does it require the use of a bidirectional DC / DC converter module. The control logic has good universality, is easy to operate, and has high safety.

[0053] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A method for external power sharing control of new energy heavy trucks used for flatbed truck transportation, characterized in that, include: Obtain the driver's input of a shared operation command or a shared exit command; Based on the shared operation command, the control unit performs a status self-check, and when the status self-check result meets the shared entry conditions, it performs power sharing entry control processing to establish a shared mode in which the power battery of the dispatched vehicle supplies power to the high-voltage load of the flatbed truck; wherein, the power sharing entry control processing includes: controlling the flatbed truck to power off the high voltage, closing the high-voltage relay of the power sharing switching unit, controlling the main negative relay of the dispatched vehicle to close, and completing the remaining high-voltage power-on work. Based on the shared exit command, the control unit performs power sharing exit control processing to exit the shared mode; wherein, the power sharing exit control processing includes: controlling the flatbed car to de-energize, disconnecting the high-voltage relay of the power sharing switching unit, controlling the high-voltage accessories of the dispatched car to de-energize, and disconnecting the main negative relay of the dispatched car.

2. The method for external power sharing control of new energy heavy trucks for flatbed truck transportation according to claim 1, characterized in that, The process of obtaining the driver's input sharing operation command or sharing exit command includes: Receives operation signals from the driver regarding the switching button; The operation signal is subjected to debouncing and validity verification. When the verification passes, the shared operation instruction or the shared exit instruction is generated.

3. The method for external power sharing control of new energy heavy trucks for flatbed truck transportation according to claim 1, characterized in that, The control unit performs a status self-check, including: The connection status between the first high and low voltage interface of the external power sharing device and the high and low voltage interface of the transport vehicle, as well as the connection status between the second high and low voltage interface and the high and low voltage interface of the flatbed vehicle, are detected. Detect whether there are short circuit faults, insulation faults, overvoltage or undervoltage in the high voltage circuits of the power sharing switching unit, the dispatched vehicle and the flatbed car; When the connection status is normal and the high-voltage circuit is fault-free, the self-test result of the status is determined to meet the shared entry condition.

4. The method for external power sharing control of new energy heavy trucks for flatbed truck transportation according to claim 1, characterized in that, The power sharing entry control process includes: The control unit wakes up the ON position of the dispatched vehicle, causing the relevant controllers of the dispatched vehicle to perform a power-on self-test; The control unit simulates the BMS request for a power-down command via CAN signal, and the HCU of the flatbed truck executes the high-voltage power-down according to the power-down procedure until the main negative relay of the flatbed truck is disconnected. After the main negative relay of the flatbed truck is disconnected, the control unit controls the positive and negative relays in the power sharing switching unit to be energized; The control unit sends a command to the main negative relay of the dispatched vehicle to engage. The BMS or HCU of the dispatched vehicle controls the main negative relay of the dispatched vehicle to perform a pre-check and engage after the pre-check is passed, so that the power battery of the dispatched vehicle supplies power to the high voltage load of the flatbed truck. The control unit routes the BMS signal of the dispatch vehicle to the CAN network of the flatbed truck via signal forwarding. The control unit completes the remaining high-voltage power-on operation.

5. The method for external power sharing control of new energy heavy trucks for flatbed truck transportation according to claim 4, characterized in that, The process of completing the remaining high-voltage power-on includes: The HCU of the flatbed truck controls the relays of the flatbed truck accessories to engage, completing the high-voltage power-on process for the flatbed truck accessories; after the flatbed truck key door is in the Start position, the HCU of the flatbed truck closes the main positive relay of the flatbed truck, enabling the flatbed truck motor; After the main negative relay of the dispatched vehicle is closed, the HCU of the dispatched vehicle closes the accessory relay of the dispatched vehicle, completing the high voltage power-on process of the accessories of the dispatched vehicle. The HCU of the dispatched vehicle then sends a thermal management control enable signal to enable the thermal management system of the dispatched vehicle to work.

6. The method for external power sharing control of new energy heavy trucks for flatbed truck transportation according to claim 1, characterized in that, The power sharing exit control process includes: The control unit sends a simulated request to the flatbed truck to disconnect the main negative relay, and the flatbed truck executes the high-voltage power-off process. After the high voltage of the flatbed truck is de-energized, the control unit sends a simulated request to the dispatched vehicle to disconnect the main negative relay, and the dispatched vehicle executes the high voltage de-energization process. After the high voltage of the transport vehicle is de-energized, the control unit controls the positive and negative relays in the power sharing switching unit to disconnect. After the high-voltage accessory relays of both the flatbed car and the dispatched car are disconnected, and the control unit has sent a request to disconnect the main negative relay of the dispatched car, the control unit controls the main negative relay of the dispatched car to disconnect. The control unit disconnects the wake-up power of the power sharing switching unit and the ON position power of the dispatched vehicle, causing the relevant controllers to enter sleep mode.

7. The method for external power sharing control of new energy heavy trucks for flatbed truck transportation according to claim 6, characterized in that, The power sharing exit control process also includes: After both the positive and negative relays in the power sharing switching unit are disconnected, the control unit stops sending the main negative relay disconnection request to the flatbed vehicle simulation. If the flatbed truck requires high-voltage power-on, the flatbed truck will continue to execute the high-voltage power-on procedure.

8. The method for external power sharing control of new energy heavy trucks for flatbed truck transportation according to claim 1, characterized in that, The control unit sends at least one of the following states—shared standby, shared in progress, shared out, and fault—to the flatbed vehicle instrument panel for display via CAN signal.

9. The method for external power sharing control of new energy heavy trucks for flatbed truck transportation according to claim 4, characterized in that, The control unit controls the activation of the positive and negative relays in the power sharing switching unit, including: After confirming that the main negative relay of the flatbed truck is disconnected, control the positive relay and the negative relay to directly engage; The power battery of the transport vehicle is directly electrically connected to the high-voltage load of the flatbed truck through the positive and negative relays, without going through the bidirectional DC / DC converter module, and the positive and negative relays are not pre-charged before being engaged.

10. The method for external power sharing control of new energy heavy trucks for flatbed truck transportation according to claim 8, characterized in that, When the self-test result does not meet the shared entry condition, the control unit remains in standby mode and sends fault status information to the vehicle instrument via CAN signal. When a preset fault is detected during operation in the shared mode, the control unit executes the power sharing exit control process and sends fault status information to the vehicle instrument via CAN signal.

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