A remote power battery heating system for pure electric vehicles and a control method thereof

Abstract

A remote power battery heating system for a pure electric vehicle and a control method thereof, wherein the remote control terminal is wirelessly connected to a remote monitoring service platform via a telecommunications operator network, the remote monitoring service platform is wirelessly connected to a remote vehicle-mounted monitoring terminal via a telecommunications operator network, the remote vehicle-mounted monitoring terminal, the vehicle controller, the power battery system, the high-voltage distribution box, and the DC-DC controller are all connected to the CAN bus signal, the positive and negative poles of the power battery system are connected to the positive and negative poles of the main distribution interface of the high-voltage distribution box via a high-voltage cable, the positive and negative poles of the auxiliary distribution interface of the high-voltage distribution box are connected to the positive and negative poles of the vehicle-mounted 12V battery via a DC-DC controller, and the power battery system includes a battery management system, a heating film, and a control system for the heating film. This design not only has high circuit design safety and multiple protections to avoid thermal runaway, but also has a reasonable control strategy and high monitoring safety.

Description

Technical Field

[0001] The present invention relates to a remote power battery heating system for a pure electric vehicle and a control method thereof, and is specifically suitable for improving the controllability and safety of remote heating. Background Art

[0002] Electric vehicles have zero pollution, will not cause damage to the environment in which humans live, and have also brought about great changes to the entire energy structure. They have also received strong support at the national level. As electric vehicles become more and more popular, users have put forward higher requirements for the requirements and performance of electric vehicles. As the core component of electric vehicles, power batteries have improved in performance with the development of technology. However, due to the constraints of current technology and core materials, the low-temperature performance of power batteries has not made a major breakthrough. Especially in the northern region, the capacity, life, and charge and discharge performance of batteries are greatly affected under low temperature conditions. As a result, when using electric vehicles in low temperatures in winter, the vehicle's endurance becomes shorter, acceleration is weak, charging time is long, battery life is reduced, and the user experience is very poor. To address this phenomenon, a solution that can remotely start the battery heating system function is needed. Before users need to use electric vehicles in low temperatures in winter, they can first send instructions through the remote client to start battery heating, and can control the time to go out through the client feedback of the heating time, so that the normal driving of the vehicle will not be affected by the low temperature of the battery or the need to wait for heating after getting on the vehicle. Summary of the invention

[0003] The purpose of the present invention is to overcome the problems of poor safety and poor control logic in the prior art, and to provide a pure electric vehicle remote power battery heating system and a control method thereof with high safety and control logic.

[0004] To achieve the above objectives, the technical solution of the present invention is:

[0005] A remote power battery heating system for a pure electric vehicle, the remote power battery heating system comprising: a remote control terminal, a remote monitoring service platform, a remote vehicle monitoring terminal and a vehicle controller, the remote control terminal is wirelessly connected to the remote monitoring service platform through a telecommunications operator network, the remote monitoring service platform is wirelessly connected to the remote vehicle monitoring terminal through a telecommunications operator network, the remote vehicle monitoring terminal, the vehicle controller, the power battery system, the high-voltage distribution box, and the DC-DC controller are all connected to a CAN bus signal, the positive and negative poles of the power battery system are connected to the positive and negative poles of the main distribution interface of the high-voltage distribution box through a high-voltage cable, the positive and negative poles of the auxiliary distribution interface of the high-voltage distribution box are connected to the positive and negative poles of the vehicle-mounted 12V battery through a DC-DC controller, the DC-DC controller is a DC-DC direct current step-down conversion circuit, and the vehicle-mounted 12V battery provides low-voltage power supply to the remote vehicle monitoring terminal, the vehicle controller, the power battery system, the high-voltage distribution box and the DC-DC controller respectively;

[0006] The power battery system includes a battery management system, a heating film and a control system of the heating film.

[0007] The remote monitoring service platform obtains and stores the battery remaining capacity SOC, cell temperature, cell voltage, total voltage, current, heating time, and heating status data of the power battery system on the vehicle through the remote vehicle monitoring terminal;

[0008] The remote control terminal is a mobile phone with a remote heating program APP installed and a device with the function of connecting to the telecommunications operator's network; the remote control terminal can query the remote monitoring service platform for the battery remaining power, single cell temperature, single cell voltage, total voltage, current, heating time, and heating status data information of the power battery system on its corresponding vehicle, and the remote control terminal can send instructions to its corresponding remote vehicle-mounted monitoring terminal to turn on and off battery heating through the remote monitoring service platform;

[0009] The remote vehicle monitoring terminal has a telecommunications operator network function and a CAN wake-up function.

[0010] The remote vehicle monitoring terminal is provided with a binding information comparison module, which is used to compare the consistency of the terminal's own ICCID number with the ICCID number in a specific message sent by the vehicle controller via CAN;

[0011] The vehicle controller is provided with a binding storage unit, and the binding storage unit is used to store the ICCID number sent by the remote vehicle monitoring terminal via CAN.

[0012] The power battery system includes a battery management system, a heating film and a control system for the heating film. A main negative contactor is arranged on the main negative circuit in the battery management system. The power battery in the battery management system is composed of a plurality of power battery cells connected in series. A fuse is arranged on the negative circuit of the power battery. In the control system of the heating film, a heating film contactor is arranged at each end of the positive and negative electrodes of the heating film.

[0013] The vehicle controller collects data from the power battery system, the high-voltage distribution box and the DC-DC controller through the CAN bus, and the vehicle controller controls the power battery system, the high-voltage distribution box and the DC-DC controller through the CAN bus.

[0014] A control method for a remote power battery heating system of a pure electric vehicle, the binding method comprising the following steps:

[0015] Step 1: Binding of the remote vehicle monitoring terminal and the vehicle controller. After the vehicle is assembled and off the assembly line, and the vehicle is powered on at low voltage, the remote vehicle monitoring terminal sends the ICCID number on its own device to the vehicle CAN network through a specific ID. When the vehicle controller receives the ID in the vehicle CAN network, it turns on the storage function to store the ICCID information in the ID in a specific storage module. After the storage is successful, the user cannot change it by himself. If you need to change it, you need to obtain the authorization of the host manufacturer to change it. The vehicle controller sends the stored ICCID information in a specific ID to the vehicle CAN network. After the remote vehicle monitoring terminal receives the ICCID message of the specific ID sent by the vehicle controller in the vehicle CAN network, it will stop sending the ICCID number of the device. After the remote vehicle monitoring terminal receives the ICCID number in the specific ID, the binding information comparison module starts working. The binding information comparison module will retrieve its own ICCID number in the storage module and compare it with the ICCID number sent by the remote vehicle monitoring terminal in the CAN network. After the comparison is successful, the remote vehicle monitoring terminal will send the binding success message to the remote monitoring service platform.

[0016] Step 2: Binding and activating the remote vehicle monitoring terminal and the remote monitoring service platform;

[0017] First, maintain the vehicle information that needs to be activated and bound in the remote monitoring service platform database, and transmit the ICCID number of the remote vehicle monitoring terminal installed on the vehicle and the VIN code of the corresponding vehicle to the remote monitoring service platform. After the data maintenance is successful, the remote monitoring service platform will store the data and provide real-time query;

[0018] After the remote vehicle monitoring terminal is successfully bound to the vehicle controller, the remote vehicle monitoring terminal sends the ICCID number of the device and the binding success information to the remote monitoring service platform. After receiving the ICCID number and binding information sent by the remote vehicle monitoring terminal, the remote monitoring service platform searches the database to see whether the corresponding ICCID number is already stored. If the corresponding ICCID number is not found within the set time, the remote monitoring service platform will be fed back the information that the corresponding ICCID number is not found, and re-query will be performed every 5 minutes; if the corresponding ICCID number is found within the set time, the remote vehicle monitoring terminal and the vehicle controller binding information in the information will continue to be checked to see if the special flag bit is set; if there is set information, the remote vehicle monitoring terminal will be activated and online on the remote monitoring service platform and the binding will be successful; if there is no set information, the binding is unsuccessful, and the binding failure information will be fed back to the remote monitoring service platform, and the set information will be checked again every 5 minutes;

[0019] Step 3: The remote control terminal logs in to the remote monitoring service platform through the registered account, and enters the ICCID number of the remote vehicle monitoring terminal on the corresponding vehicle for binding. After the binding is successful, the remote control terminal can be used to exchange information and control battery heating with the remote vehicle monitoring terminal through the remote monitoring service platform;

[0020] Step 4: Parking heating process. When the vehicle is parked and the key is in the OFF position, the vehicle controller uploads the vehicle status to the remote vehicle monitoring terminal. The remote vehicle monitoring terminal transmits the relevant information to the remote monitoring service platform, and the remote monitoring service platform saves the vehicle's last status. When the remote control terminal is connected to the remote monitoring service platform, the relevant vehicle information will be transmitted to the remote control terminal. The remote heating function can only be used when the vehicle is parked and powered off and the battery heating function option of the remote control terminal is in a valid state. After the remote control terminal is connected to the remote monitoring service platform through the telecommunications operator network and the heating request is turned on, the remote monitoring service platform sends the heating instruction to the remote vehicle monitoring terminal of the corresponding vehicle through the telecommunications operator network in the form of wireless transmission. The dormant remote vehicle monitoring terminal is activated after receiving the command from the remote monitoring service platform. The activated remote vehicle monitoring terminal uses CAN activation via the CAN bus The vehicle controller is awakened and sends a heating instruction; after the vehicle controller is awakened and receives the heating instruction, the vehicle controller wakes up the power battery system, the high-voltage distribution box and the DC-DC controller by CAN activation through the CAN bus. The awakened power battery system, the high-voltage distribution box and the DC-DC controller perform fault self-inspection and feed back the self-inspection status to the vehicle controller. When the vehicle controller receives the normal self-inspection signal of the power battery system, the high-voltage distribution box and the DC-DC controller, the vehicle controller sends a heating instruction to the power battery system. When the vehicle controller receives any abnormal self-inspection signal of the power battery system, the high-voltage distribution box and the DC-DC controller, the vehicle controller sends a message of self-inspection abnormality and inability to heat to the remote on-board monitoring terminal through the CAN bus. The remote on-board monitoring terminal sends the information of self-inspection abnormality and inability to heat to the remote control terminal through the remote monitoring service platform, and the remote control terminal displays the relevant prompt of self-inspection abnormality and inability to heat.

[0021] Step 5: System safety strategy and low-voltage power supply method in the heating process:

[0022] a. After receiving the heating instruction, the power battery system starts to determine whether the heating conditions are met:

[0023] Condition 1: Remaining power ≥ 20%;

[0024] Condition 2: The minimum temperature Tmin of the power battery cell is between -20℃ and 15℃, and the maximum temperature Tmax of the power battery cell is ≤30℃, and Tmax-Tmin is ≤10℃;

[0025] Condition 3: The power battery system detects the insulation resistance of the entire high-voltage system in real time, and the insulation resistance of the entire high-voltage system is ≥500Ω / V;

[0026] Condition 4: The minimum value of the power battery cell voltage Umin ≥ 3.0V;

[0027] Condition 5: The battery management system determines that the heating contactor and the main negative contactor have no adhesion fault;

[0028] When the above conditions are met, the power battery system feeds back to the vehicle controller to allow entry into the heating state. After receiving the feedback, the vehicle controller sends a command to the power battery system to close the main negative contactor. After receiving the command, the power battery system executes the closing of the main negative contactor and feeds back the closing state to the vehicle controller. After the power battery system closes the main negative contactor, it delays for 2S before closing the heating contactor, and feeds back the heating contactor state to the vehicle controller. At this time, after the heating contactor is closed, the heating film starts to work to heat the power battery.

[0029] When any of the above five conditions is not met, the vehicle controller will feedback the heating start failure to the remote vehicle monitoring terminal, and the remote vehicle monitoring terminal will feedback the heating start failure information to the remote monitoring service platform after receiving it, and the remote monitoring service platform will feedback the information to the remote control terminal;

[0030] b. After the heating film is started, the battery management system extracts the battery heating temperature rise data according to the collected Tmin temperature value, calculates the time required for the temperature to rise from Tmin to 15°C, and transmits the heating time to the remote control terminal through the remote monitoring service platform. The user arranges travel reasonably according to the heating time displayed on the remote control terminal;

[0031] c. After receiving the main negative contactor and heating contactor energization status feedback from the power battery system, the vehicle controller sends a command to the high-voltage distribution box to energize the accessory contactor. After receiving the energization command, the high-voltage distribution box energizes the accessory contactor and feeds back the energization status to the vehicle controller;

[0032] After the vehicle controller receives the accessory contactor closure status feedback from the high-voltage distribution box, it sends a work enable signal to the DC-DC controller. After receiving the work enable, the DC-DC controller starts working. The power battery system supplies high voltage electricity to the DC-DC controller through the high-voltage distribution box. The DC-DC controller converts the high voltage electricity output by the power battery system into 12V low voltage electricity to supply the on-board 12V battery. The on-board 12V battery supplies power to the 12V low voltage equipment of the vehicle to ensure continuous power supply to all equipment.

[0033] Step 6: Stop heating. After the battery heating is turned on, stop heating when Tmax-Tmin≥10℃ or Tmax>30℃ or Tmin>15℃ or the heating time exceeds 2h during the heating process;

[0034] Stop the heating process. The vehicle controller first sends a command to stop the DC-DC controller. After confirming that the DC-DC controller stops working, it sends a command to the high-voltage distribution box to disconnect the accessory contactor. After the vehicle controller receives feedback that the accessory contactor is disconnected, it sends a command to disconnect the main negative contactor to the power battery system. After receiving the command, the power battery system disconnects the main negative contactor. After confirming that the main negative contactor is disconnected, it delays 2 seconds to disconnect the heating contactor, and feeds back the status of all contactors to the vehicle controller. At the same time, the heating status is fed back to the remote vehicle monitoring terminal. The final information will be transmitted to the remote control terminal. Users can see the status information and key information of the power battery. After the vehicle controller confirms that all components are powered off, the vehicle controller sends a sleep command through the CAN bus, and the system enters sleep. After receiving the sleep command, the remote vehicle monitoring terminal delays 5 minutes before entering sleep.

[0035] When the remote heating system is working, if the key is inserted to start the vehicle, the vehicle controller detects the key ON signal and sends a stop heating command to the power battery system. After the power battery system receives both the ON signal and the stop heating command, the heating function is completely taken over by the power battery system and enters the driving heating state. The power battery system determines whether to start or exit heating based on the driving heating conditions.

[0036] In the first step, the vehicle controller sends the stored ICCID information in the specific ID to the vehicle CAN network. The data in the specific ID includes ICCID information, heartbeat information and check code information, wherein the heartbeat information is used to indicate whether the vehicle controller is online and whether the operation is normal. After the remote vehicle monitoring terminal is bound to the vehicle controller for the first time, the remote vehicle monitoring terminal starts the comparison verification, which includes:

[0037] A. When the remote vehicle monitoring terminal does not receive the ICCID message of the specific ID sent by the vehicle controller for 30 consecutive cycles, it will consider that the vehicle controller is offline. One cycle is 1000ms. The remote vehicle monitoring terminal will feedback the offline information to the remote monitoring service platform. After receiving the message, the remote monitoring service platform will not respond to any operation instructions of the remote control terminal.

[0038] B. After receiving the ICCID message of the specific ID sent by the vehicle controller, the remote vehicle monitoring terminal will perform a real-time comparison. When the ICCID number in the specific ID sent by the vehicle controller is inconsistent with the ICCIC number stored in the remote vehicle monitoring terminal and lasts for more than 10 cycles, it is considered that the vehicle controller has been replaced and is not in the factory state, and this information is fed back to the remote monitoring service platform. After receiving this information, the remote monitoring service platform will not respond to any operation instructions of the remote control terminal;

[0039] C. After receiving the ICCID message with a specific ID sent by the vehicle controller, the remote vehicle monitoring terminal processes the heartbeat signal and verification information in the message data. If the heartbeat information or verification information is abnormal, the remote monitoring service platform will feedback this information to the remote monitoring service platform. After receiving this information, the remote monitoring service platform will not respond to any operation instructions of the remote control terminal;

[0040] For safety reasons, any abnormal conditions A, B, and C that appear when the above-mentioned remote vehicle monitoring terminal is turned on for comparison and verification must be handled at an authorized 4S store.

[0041] In the fifth step, when the battery heating is turned on and reaches the heating temperature or a system failure occurs during the heating process, when the vehicle controller receives a shutdown request due to a serious failure of the DC-DC controller or the high-voltage distribution box, the vehicle controller first sends an instruction to stop the DC-DC controller, and then sends an instruction to the high-voltage distribution box to disconnect the accessory contactor after confirming that the DC-DC controller has stopped working. After the vehicle controller receives feedback that the accessory contactor is disconnected, it sends an instruction to disconnect the main negative contactor to the power battery system. After receiving the instruction, the power battery system disconnects the main negative contactor, and after confirming that the main negative contactor is disconnected, it delays 2 seconds to disconnect the heating contactor, and feeds back the status of all contactors to the vehicle controller, and at the same time feeds back the heating status to the remote on-board monitoring terminal. Finally, the information will be transmitted to the remote control terminal, and the user can see the status information and key information of the power battery. After the vehicle controller confirms that the high voltage of all components is powered off, the vehicle controller sends a sleep instruction through the CAN bus, and the system enters sleep. After receiving the sleep instruction, the remote on-board monitoring terminal delays 5 minutes before entering sleep.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] Before using electric vehicles in low temperatures in winter, users can first send commands through the remote client to start battery heating, and can control the time of going out through the client feedback of the heating time, so that the low temperature of the battery will not affect the vehicle's power, driving range, slow charging, and shortened battery life, thereby improving user satisfaction. The control process and strategy of this solution have high security, thus ensuring the safety of vehicles and personnel.

[0044] 1. In a remote power battery heating system for a pure electric vehicle of the present invention, a remote monitoring service platform is used to connect signals with a remote control terminal and a remote vehicle-mounted monitoring terminal. All instructions and related operations of the remote control terminal must be read, saved and forwarded through the remote monitoring service platform. The remote monitoring service platform will read whether the vehicle status can execute the heating instruction. Multiple protections prevent the erroneous sending of the heating instruction from causing safety hazards to the vehicle. Therefore, the design has high safety and reliability, and avoids safety hazards caused by misoperation.

[0045] 2. In the remote power battery heating system of a pure electric vehicle of the present invention, a DC-DC controller is used to charge the battery during the heating process, ensuring the low-voltage power supply of the battery to each controller, and preventing the problem that the vehicle cannot drive due to undervoltage of the battery during the parking heating process. Therefore, the circuit structure of the present design is reasonably designed, and the situation of undervoltage of the battery during the parking heating process is effectively avoided.

[0046] 3. In the remote power battery heating system of a pure electric vehicle of the present invention, if a short circuit or overcurrent occurs in the heating film during the heating process, the fuse can effectively prevent the risk of thermal runaway; when the heating is started, the battery management system will first determine whether the heating disconnect contactor is adhered, to prevent the contactor from being unable to disconnect after the heating is started, causing the battery temperature to continue to rise, and causing thermal runaway of the battery; the main negative contactor and the heating contactor are simultaneously connected to the heating film loop to prevent thermal runaway caused by a certain contactor being unable to disconnect after adhesion. Since the remote battery heating is unattended, a corresponding protection mechanism is added to the heating film loop to effectively improve the safety measures during the heating process and improve the safety of the entire solution. Therefore, the circuit design of this design is highly safe and has multiple protections to avoid thermal runaway.

[0047] 4. The remote power battery heating system of a pure electric vehicle of the present invention needs to go through a binding procedure when in use, so that the remote vehicle monitoring terminal and the vehicle controller are uniquely corresponding, to prevent the heating command from being sent to an unspecified vehicle after the equipment is interchanged, causing related safety accidents and disputes; at the same time, the vehicle's power battery temperature, remaining power, battery cell voltage, total voltage, total current, heating status, and heating time can be viewed through the remote control terminal, which is convenient for users to grasp the vehicle status, and judge whether the vehicle needs battery heating or charging according to the vehicle status, and at the same time, the travel time can be inferred according to the heating time determined by the battery management system. Therefore, the remote vehicle monitoring terminal of this design is uniquely bound to avoid safety accidents, and the remote control terminal can query the vehicle battery status in real time.

[0048] 5. In the process of remotely controlling the heating of the battery pack, the vehicle controller of a remote power battery heating system for a pure electric vehicle of the present invention monitors the working status and fault status of the vehicle-related high-voltage devices in real time. When the vehicle controller judges and receives other component failures and requests to power off, it will actively stop requesting the battery management system to stop heating to protect the safety of the vehicle and the battery and feed back the stop heating status to the remote battery heating terminal. There are certain safety risks in heating the battery pack when there is no one on duty. This system performs relevant monitoring through the battery management system and the vehicle control, and heating can only be performed when there is no complete risk to the vehicle. Therefore, the control strategy of this design is reasonable and the monitoring safety is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a structural schematic diagram of the present invention.

[0050] Figure 2 It is the high voltage control circuit diagram of the power battery system.

[0051] In the figure: remote control terminal 1, remote monitoring service platform 2, remote vehicle monitoring terminal 3, vehicle controller 4, power battery system 5, high-voltage distribution box 6, DC-DC controller 7, vehicle-mounted 12V battery 8. DETAILED DESCRIPTION

[0052] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0053] See also Figure 1 , Figure 2 A remote power battery heating system for a pure electric vehicle, the remote power battery heating system comprising: a remote control terminal 1, a remote monitoring service platform 2, a remote vehicle monitoring terminal 3 and a vehicle controller 4, the remote control terminal 1 is wirelessly connected to the remote monitoring service platform 2 through a telecommunications operator network, the remote monitoring service platform 2 is wirelessly connected to the remote vehicle monitoring terminal 3 through a telecommunications operator network, the remote vehicle monitoring terminal 3, the vehicle controller 4, the power battery system 5, the high-voltage distribution box 6, and the DC-DC controller 7 are all connected to the CAN bus signal, the positive and negative poles of the power battery system 5 are connected to the positive and negative poles of the main distribution interface of the high-voltage distribution box 6 through a high-voltage cable, the positive and negative poles of the auxiliary distribution interface of the high-voltage distribution box 6 are connected to the positive and negative poles of the vehicle-mounted 12V battery 8 through the DC-DC controller 7, the DC-DC controller 7 is a DC-DC direct current step-down conversion circuit, and the vehicle-mounted 12V battery 8 provides low-voltage power supply to the remote vehicle monitoring terminal 3, the vehicle controller 4, the power battery system 5, the high-voltage distribution box 6 and the DC-DC controller 7 respectively;

[0054] The power battery system 5 includes a battery management system, a heating film and a control system of the heating film.

[0055] The remote monitoring service platform 2 obtains and stores the battery remaining capacity SOC, cell temperature, cell voltage, total voltage, current, heating time, and heating status data of the power battery system 5 on the vehicle through the remote vehicle monitoring terminal 3;

[0056] The remote control terminal 1 is a mobile phone with a remote heating program APP installed and has the function of connecting to the telecommunications operator's network; the remote control terminal 1 can query the remote monitoring service platform 2 for the battery remaining power, single cell temperature, single cell voltage, total voltage, current, heating time, and heating status data information of the power battery system 5 on its corresponding vehicle, and the remote control terminal 1 can send instructions to its corresponding remote vehicle-mounted monitoring terminal 3 to turn on and off the battery heating through the remote monitoring service platform 2;

[0057] The remote vehicle monitoring terminal 3 has a telecommunications operator network function and a CAN wake-up function.

[0058] The remote vehicle monitoring terminal 3 is internally provided with a binding information comparison module, which is used to compare the consistency of the terminal's own ICCID number with the ICCID number in a specific message sent by the vehicle controller 4 via CAN;

[0059] The vehicle controller 4 is provided with a binding storage unit, and the binding storage unit is used to store the ICCID number sent by the remote vehicle monitoring terminal 3 via CAN.

[0060] The power battery system 5 includes a battery management system, a heating film and a control system for the heating film. A main negative contactor is provided on the main negative circuit in the battery management system. The power battery in the battery management system is composed of a plurality of power battery cells connected in series. A fuse is provided on the negative circuit of the power battery. In the control system of the heating film, a heating film contactor is provided at each end of the positive and negative electrodes of the heating film.

[0061] The vehicle controller 4 collects data of the power battery system 5, the high-voltage distribution box 6 and the DC-DC controller 7 through the CAN bus, and the vehicle controller 4 controls the power battery system 5, the high-voltage distribution box 6 and the DC-DC controller 7 through the CAN bus.

[0062] A control method for a remote power battery heating system of a pure electric vehicle, the binding method comprising the following steps:

[0063] Step 1: Binding of the remote vehicle monitoring terminal 3 and the vehicle controller 4. After the vehicle is assembled and off the assembly line, and the vehicle is powered on at low voltage, the remote vehicle monitoring terminal 3 sends the ICCID number on its own device to the vehicle CAN network through a specific ID. When the vehicle controller 4 receives the ID in the vehicle CAN network, it turns on the storage function and stores the ICCID information in the ID into a specific storage module. After the storage is successful, the user cannot change it by himself. If the change is required, the specific host computer authorized by the host manufacturer needs to be changed. The vehicle controller 4 stores the stored ICCID information in a specific I D is sent to the vehicle CAN network. After the remote vehicle monitoring terminal 3 receives the ICCID message of the specific ID sent by the vehicle controller 4 in the vehicle CAN network, it will stop sending the ICCID number of the device; after the remote vehicle monitoring terminal 3 receives the ICCID number in the specific ID, the binding information comparison module starts working. The binding information comparison module will retrieve its own ICCID number in the storage module and compare it with the ICCID number sent by the remote vehicle monitoring terminal 3 in the CAN network. After the comparison is successful, the remote vehicle monitoring terminal 3 will send the binding success message to the remote monitoring service platform 2;

[0064] Step 2: Binding and activating the remote vehicle monitoring terminal 3 and the remote monitoring service platform 2;

[0065] First, the vehicle information that needs to be activated and bound is maintained in the database of the remote monitoring service platform 2, and the ICCID number of the remote vehicle monitoring terminal 3 installed on the vehicle and the VIN code of the corresponding vehicle are transmitted to the remote monitoring service platform 2. After the data maintenance is successful, the remote monitoring service platform 2 stores the data and provides real-time query;

[0066] After the remote vehicle monitoring terminal 3 is successfully bound to the vehicle controller 4, the remote vehicle monitoring terminal 3 sends the ICCID number of the device and the binding success information to the remote monitoring service platform 2. After receiving the ICCID number and binding information sent by the remote vehicle monitoring terminal 3, the remote monitoring service platform 2 searches the database for the corresponding ICCID number stored. If the corresponding ICCID number is not found within the set time, the remote monitoring service platform 2 will feedback the information that the corresponding ICCID number is not found to the remote monitoring service platform 2, and execute a re-query every 5 minutes; if the corresponding ICCID number is found within the set time, continue to check whether the special flag bit in the binding information of the remote vehicle monitoring terminal 3 and the vehicle controller 4 in the information is set; if there is set information, the remote vehicle monitoring terminal 3 is activated and online on the remote monitoring service platform 2 and the binding is successful; if there is no set information, the binding is unsuccessful, and the binding failure information is fed back to the remote monitoring service platform 2, and the set information is checked again every 5 minutes;

[0067] Step 3: The remote control terminal 1 logs in to the remote monitoring service platform 2 through the registered account, and enters the ICCID number of the remote vehicle monitoring terminal 3 on the corresponding vehicle for binding. After the binding is successful, the remote control terminal 1 can be used to exchange information and control battery heating with the remote vehicle monitoring terminal 3 through the remote monitoring service platform 2;

[0068] Step 4: Parking heating process, when the vehicle is parked and the key is in the OFF position, the vehicle controller 4 uploads the vehicle status to the remote vehicle monitoring terminal 3, the remote vehicle monitoring terminal 3 transmits the relevant information to the remote monitoring service platform 2, and the remote monitoring service platform 2 saves the vehicle's last status; when the remote control terminal 1 is connected to the remote monitoring service platform 2, the relevant vehicle information will be transmitted to the remote control terminal 1. Only when the vehicle is in a parked and powered-off state, the battery heating function option of the remote control terminal 1 is in a valid state, can the remote heating function be used; after the remote control terminal 1 is connected to the remote monitoring service platform 2 through the telecommunications operator network and turns on the heating request, the remote monitoring service platform 2 sends the heating instruction to the remote vehicle monitoring terminal 3 of the corresponding vehicle through the telecommunications operator network in the form of wireless transmission. The remote vehicle monitoring terminal 3 in the dormant state is activated after receiving the command from the remote monitoring service platform 2, and the activated remote vehicle monitoring terminal 3 is awakened by CAN activation through the CAN bus. The vehicle controller 4 issues a heating instruction; after the vehicle controller 4 is awakened and receives the heating instruction, the vehicle controller 4 awakens the power battery system 5, the high-voltage distribution box 6 and the DC-DC controller 7 through the CAN bus by CAN activation. The awakened power battery system 5, the high-voltage distribution box 6 and the DC-DC controller 7 perform fault self-inspection and feed back the self-inspection status to the vehicle controller 4. When the vehicle controller 4 receives the normal self-inspection signal of the power battery system 5, the high-voltage distribution box 6 and the DC-DC controller 7, the vehicle controller 4 issues a heating instruction to the power battery system 5. When the vehicle controller 4 receives any self-inspection abnormality signal of the power battery system 5, the high-voltage distribution box 6 and the DC-DC controller 7, the vehicle controller 4 sends a message of self-inspection abnormality and inability to heat to the remote vehicle monitoring terminal 3 through the CAN bus. The remote vehicle monitoring terminal 3 sends the information of self-inspection abnormality and inability to heat to the remote control terminal 1 through the remote monitoring service platform 2, and the remote control terminal 1 displays the relevant prompt of self-inspection abnormality and inability to heat.

[0069] Step 5: System safety strategy and low-voltage power supply method in the heating process:

[0070] a. After receiving the heating instruction, the power battery system 5 starts to determine whether the heating conditions are met:

[0071] Condition 1: Remaining power ≥ 20%;

[0072] Condition 2: The minimum temperature Tmin of the power battery cell is between -20℃ and 15℃, and the maximum temperature Tmax of the power battery cell is ≤30℃, and Tmax-Tmin is ≤10℃;

[0073] Condition 3: The power battery system 5 detects the insulation resistance of the entire high-voltage system in real time, and the insulation resistance of the entire high-voltage system is ≥ 500Ω / V;

[0074] Condition 4: The minimum value of the power battery cell voltage Umin ≥ 3.0V;

[0075] Condition 5: The battery management system determines that the heating contactor and the main negative contactor have no adhesion fault;

[0076] When the above conditions are met, the power battery system 5 gives feedback to the vehicle controller 4 to allow the vehicle to enter the heating state. After receiving the feedback, the vehicle controller 4 sends a command to the power battery system 5 to close the main negative contactor. After receiving the command, the power battery system 5 executes the closing of the main negative contactor and feeds back the closing state to the vehicle controller 4. After the power battery system 5 closes the main negative contactor, it delays for 2S and closes the heating contactor, and feeds back the heating contactor state to the vehicle controller 4. At this time, after the heating contactor is closed, the heating film starts to work to heat the power battery.

[0077] When any one of the above five conditions is not met, the vehicle controller 4 will feedback the heating start failure to the remote vehicle monitoring terminal 3, and the remote vehicle monitoring terminal 3 will feedback the heating start failure information to the remote monitoring service platform 2, and the remote monitoring service platform 2 will feedback the information to the remote control terminal 1;

[0078] b. After the heating film is started, the battery management system extracts the battery heating temperature rise data according to the collected Tmin temperature value, calculates the time required for the temperature to rise from Tmin to 15°C, and transmits the heating time to the remote control terminal 1 through the remote monitoring service platform 2. The user arranges travel reasonably according to the heating time displayed on the remote control terminal 1;

[0079] c. After receiving the main negative contactor and the heating contactor energizing status feedback from the power battery system 5, the vehicle controller 4 sends a command to the high-voltage distribution box 6 to energize the accessory contactor. After receiving the energizing command, the high-voltage distribution box 6 energizes the accessory contactor and feeds back the energizing status to the vehicle controller 4;

[0080] After the vehicle controller 4 receives the accessory contactor closure status feedback from the high-voltage distribution box 6, it sends a work enable signal to the DC-DC controller 7. After receiving the work enable, the DC-DC controller 7 starts working. The power battery system 5 supplies high voltage electricity to the DC-DC controller 7 through the high-voltage distribution box 6. The DC-DC controller 7 converts the high voltage electricity output by the power battery system 5 into 12V low voltage electricity to supply the on-board 12V battery 8. The on-board 12V battery 8 supplies power to the 12V low voltage equipment of the vehicle to ensure continuous power supply to all equipment.

[0081] Step 6: Stop heating. After the battery heating is turned on, stop heating when Tmax-Tmin≥10℃ or Tmax>30℃ or Tmin>15℃ or the heating time exceeds 2h during the heating process;

[0082] Stop the heating process. The vehicle controller 4 first sends an instruction to stop the DC-DC controller 7. After confirming that the DC-DC controller 7 stops working, it sends an instruction to the high-voltage distribution box 6 to disconnect the accessory contactor. After receiving the feedback that the accessory contactor is disconnected, the vehicle controller 4 sends an instruction to disconnect the main negative contactor to the power battery system 5. After receiving the instruction, the power battery system 5 disconnects the main negative contactor. After confirming that the main negative contactor is disconnected, it delays 2 seconds to disconnect the heating contactor, and feeds back the status of all contactors to the vehicle controller 4. At the same time, the heating status is fed back to the remote vehicle monitoring terminal 3. The final information will be transmitted to the remote control terminal 1. The user can see the status information and key information of the power battery. After the vehicle controller 4 confirms that all components are powered off, the vehicle controller 4 sends a sleep instruction through the CAN bus, and the system enters sleep. After receiving the sleep instruction, the remote vehicle monitoring terminal 3 delays 5 minutes before entering sleep;

[0083] When the remote heating system is working, if the key is inserted to start the vehicle, the vehicle controller 4 detects the key ON signal and sends a stop heating instruction to the power battery system 5. After the power battery system 5 receives the ON signal and the stop heating instruction at the same time, the heating function is completely taken over by the power battery system 5 and enters the driving heating state. The power battery system 5 determines whether to perform heating or exit heating according to the driving heating conditions.

[0084] In the first step, the vehicle controller 4 sends the stored ICCID information in the specific ID to the vehicle CAN network. The data in the specific ID includes ICCID information, heartbeat information and check code information, wherein the heartbeat information is used to indicate whether the vehicle controller 4 is online and whether the operation is normal; after the remote vehicle monitoring terminal 3 is bound to the vehicle controller 4 for the first time, the remote vehicle monitoring terminal 3 starts the comparison verification, which includes:

[0085] A. When the remote vehicle monitoring terminal does not receive the ICCID message with a specific ID sent by the vehicle controller 4 for 30 consecutive cycles, it considers that the vehicle controller 4 is offline. One cycle is 1000ms. The remote vehicle monitoring terminal 3 feeds back the offline information to the remote monitoring service platform 2. After receiving the message, the remote monitoring service platform 2 will not respond to any operation instructions from the remote control terminal 1.

[0086] B. After receiving the ICCID message of the specific ID sent by the vehicle controller 4, the remote vehicle monitoring terminal 3 performs a real-time comparison. When the ICCID number in the specific ID sent by the vehicle controller 4 is inconsistent with the ICCIC number stored in the remote vehicle monitoring terminal 3 and lasts for more than 10 cycles, it is considered that the vehicle controller 4 has been replaced and is not in the factory state, and this information is fed back to the remote monitoring service platform 2. After receiving this information, the remote monitoring service platform 2 will not respond to any operation instructions of the remote control terminal 1;

[0087] C. After receiving the ICCID message of a specific ID sent by the vehicle controller 4, the remote vehicle monitoring terminal 3 processes the heartbeat signal and verification information in the message data. If the heartbeat information or verification information is abnormal, the remote monitoring service platform 2 will feedback the information to the remote monitoring service platform 2. After receiving the information, the remote monitoring service platform 2 will not respond to any operation instructions of the remote control terminal 1.

[0088] For safety reasons, any abnormal conditions in A, B, and C that occur when the remote vehicle monitoring terminal 3 is turned on for comparison and verification must be handled at an authorized 4S store.

[0089] In the fifth step, when the battery heating is turned on and reaches the heating temperature or a system failure occurs during the heating process, when the vehicle controller 4 receives a shutdown request due to a serious failure of the DC-DC controller 7 or the high-voltage distribution box 6, the vehicle controller 4 first sends an instruction to stop the DC-DC controller 7, and then sends an instruction to the high-voltage distribution box 6 to disconnect the accessory contactor after confirming that the DC-DC controller 7 stops working. After the vehicle controller 4 receives feedback that the accessory contactor is disconnected, it sends an instruction to disconnect the main negative contactor to the power battery system 5. After receiving the instruction, the power battery system 5 disconnects the main negative contactor, and after confirming that the main negative contactor is disconnected, it delays 2 seconds to disconnect the heating contactor, and feeds back the status of all contactors to the vehicle controller 4, and feeds back the heating status to the remote vehicle monitoring terminal 3. Finally, the information will be transmitted to the remote control terminal 1, and the user can see the status information and key information of the power battery. After the vehicle controller 4 confirms that the high voltage of all components is powered off, the vehicle controller 4 sends a sleep instruction through the CAN bus, and the system enters sleep. After receiving the sleep instruction, the remote vehicle monitoring terminal 3 delays 5 minutes before entering sleep.

[0090] The principle of the present invention is described as follows:

[0091] After the heating is successfully started, the BMS (battery management system) will calculate the time required to heat to the predetermined temperature and feed the time back to the remote control terminal 1. The user can travel reasonably and safely through the time displayed on the terminal, which increases the user experience and convenience.

[0092] Embodiment 1:

[0093] A remote power battery heating system for a pure electric vehicle, the remote power battery heating system comprising: a remote control terminal 1, a remote monitoring service platform 2, a remote vehicle monitoring terminal 3 and a vehicle controller 4, the remote control terminal 1 is wirelessly connected to the remote monitoring service platform 2 through a telecommunications operator network, the remote monitoring service platform 2 is wirelessly connected to the remote vehicle monitoring terminal 3 through a telecommunications operator network, the remote vehicle monitoring terminal 3, the vehicle controller 4, the power battery system 5, the high-voltage distribution box 6, and the DC-DC controller 7 are all connected to the CAN bus signal The positive and negative electrodes of the power battery system 5 are connected to the positive and negative electrodes of the main distribution interface of the high-voltage distribution box 6 through a high-voltage cable, and the positive and negative electrodes of the auxiliary distribution interface of the high-voltage distribution box 6 are connected to the positive and negative electrodes of the vehicle-mounted 12V battery 8 through a DC-DC controller 7. The DC-DC controller 7 is a DC-DC direct current step-down conversion circuit. The vehicle-mounted 12V battery 8 provides low-voltage power supply for the remote vehicle-mounted monitoring terminal 3, the vehicle controller 4, the power battery system 5, the high-voltage distribution box 6 and the DC-DC controller 7 respectively; the power battery system 5 includes a A battery management system, a heating film and a control system for the heating film; a binding information comparison module is provided inside the remote vehicle monitoring terminal 3, and the binding information comparison module is used to compare the consistency of the terminal's own ICCID number with the ICCID number in a specific message sent by the vehicle controller 4 through CAN; a binding storage unit is provided in the vehicle controller 4, and the binding storage unit is used to store the ICCID number sent by the remote vehicle monitoring terminal 3 through CAN; the power battery system 5 includes a battery management system, a heating film and a control system for the heating film, a main negative contactor is provided on the main negative circuit in the battery management system, the power battery in the battery management system is composed of a plurality of power battery cells connected in series, a fuse is provided on the negative circuit of the power battery, and a heating film contactor is provided at each end of the positive and negative electrodes of the heating film in the control system of the heating film; the vehicle controller 4 collects data of the power battery system 5, the high-voltage distribution box 6 and the DC-DC controller 7 through the CAN bus, and the vehicle controller 4 controls the power battery system 5, the high-voltage distribution box 6 and the DC-DC controller 7 through the CAN bus.

[0094] A control method for a remote power battery heating system of a pure electric vehicle, the binding method comprising the following steps:

[0095] Step 1: Binding of the remote vehicle monitoring terminal 3 and the vehicle controller 4. After the vehicle is assembled and off the assembly line, and the vehicle is powered on at low voltage, the remote vehicle monitoring terminal 3 sends the ICCID number on its own device to the vehicle CAN network through a specific ID. When the vehicle controller 4 receives the ID in the vehicle CAN network, it turns on the storage function and stores the ICCID information in the ID into a specific storage module. After the storage is successful, the user cannot change it by himself. If the change is required, the specific host computer authorized by the host manufacturer needs to be changed. The vehicle controller 4 stores the stored ICCID information in a specific I D is sent to the vehicle CAN network. After the remote vehicle monitoring terminal 3 receives the ICCID message of the specific ID sent by the vehicle controller 4 in the vehicle CAN network, it will stop sending the ICCID number of the device; after the remote vehicle monitoring terminal 3 receives the ICCID number in the specific ID, the binding information comparison module starts working. The binding information comparison module will retrieve its own ICCID number in the storage module and compare it with the ICCID number sent by the remote vehicle monitoring terminal 3 in the CAN network. After the comparison is successful, the remote vehicle monitoring terminal 3 will send the binding success message to the remote monitoring service platform 2;

[0096] Step 2: Binding and activating the remote vehicle monitoring terminal 3 and the remote monitoring service platform 2;

[0097] First, the vehicle information that needs to be activated and bound is maintained in the database of the remote monitoring service platform 2, and the ICCID number of the remote vehicle monitoring terminal 3 installed on the vehicle and the VIN code of the corresponding vehicle are transmitted to the remote monitoring service platform 2. After the data maintenance is successful, the remote monitoring service platform 2 stores the data and provides real-time query;

[0098] After the remote vehicle monitoring terminal 3 is successfully bound to the vehicle controller 4, the remote vehicle monitoring terminal 3 sends the ICCID number of the device and the binding success information to the remote monitoring service platform 2. After receiving the ICCID number and binding information sent by the remote vehicle monitoring terminal 3, the remote monitoring service platform 2 searches the database for the corresponding ICCID number stored. If the corresponding ICCID number is not found within the set time, the remote monitoring service platform 2 will feedback the information that the corresponding ICCID number is not found to the remote monitoring service platform 2, and execute a re-query every 5 minutes; if the corresponding ICCID number is found within the set time, continue to check whether the special flag bit in the binding information of the remote vehicle monitoring terminal 3 and the vehicle controller 4 in the information is set; if there is set information, the remote vehicle monitoring terminal 3 is activated and online on the remote monitoring service platform 2 and the binding is successful; if there is no set information, the binding is unsuccessful, and the binding failure information is fed back to the remote monitoring service platform 2, and the set information is checked again every 5 minutes;

[0099] Step 3: The remote control terminal 1 logs in to the remote monitoring service platform 2 through the registered account, and enters the ICCID number of the remote vehicle monitoring terminal 3 on the corresponding vehicle for binding. After the binding is successful, the remote control terminal 1 can be used to exchange information and control battery heating with the remote vehicle monitoring terminal 3 through the remote monitoring service platform 2;

[0100] Step 4: Parking heating process, when the vehicle is parked and the key is in the OFF position, the vehicle controller 4 uploads the vehicle status to the remote vehicle monitoring terminal 3, the remote vehicle monitoring terminal 3 transmits the relevant information to the remote monitoring service platform 2, and the remote monitoring service platform 2 saves the vehicle's last status; when the remote control terminal 1 is connected to the remote monitoring service platform 2, the relevant vehicle information will be transmitted to the remote control terminal 1. Only when the vehicle is in a parked and powered-off state, the battery heating function option of the remote control terminal 1 is in a valid state, can the remote heating function be used; after the remote control terminal 1 is connected to the remote monitoring service platform 2 through the telecommunications operator network and turns on the heating request, the remote monitoring service platform 2 sends the heating instruction to the remote vehicle monitoring terminal 3 of the corresponding vehicle through the telecommunications operator network in the form of wireless transmission. The remote vehicle monitoring terminal 3 in the dormant state is activated after receiving the command from the remote monitoring service platform 2, and the activated remote vehicle monitoring terminal 3 is awakened by CAN activation through the CAN bus. The vehicle controller 4 issues a heating instruction; after the vehicle controller 4 is awakened and receives the heating instruction, the vehicle controller 4 awakens the power battery system 5, the high-voltage distribution box 6 and the DC-DC controller 7 through the CAN bus by CAN activation. The awakened power battery system 5, the high-voltage distribution box 6 and the DC-DC controller 7 perform fault self-inspection and feed back the self-inspection status to the vehicle controller 4. When the vehicle controller 4 receives the normal self-inspection signal of the power battery system 5, the high-voltage distribution box 6 and the DC-DC controller 7, the vehicle controller 4 issues a heating instruction to the power battery system 5. When the vehicle controller 4 receives any self-inspection abnormality signal of the power battery system 5, the high-voltage distribution box 6 and the DC-DC controller 7, the vehicle controller 4 sends a message of self-inspection abnormality and inability to heat to the remote vehicle monitoring terminal 3 through the CAN bus. The remote vehicle monitoring terminal 3 sends the information of self-inspection abnormality and inability to heat to the remote control terminal 1 through the remote monitoring service platform 2, and the remote control terminal 1 displays the relevant prompt of self-inspection abnormality and inability to heat.

[0101] Step 5: System safety strategy and low-voltage power supply method in the heating process:

[0102] a. After receiving the heating instruction, the power battery system 5 starts to determine whether the heating conditions are met:

[0103] Condition 1: Remaining power ≥ 20%;

[0104] Condition 2: The minimum temperature Tmin of the power battery cell is between -20℃ and 15℃, and the maximum temperature Tmax of the power battery cell is ≤30℃, and Tmax-Tmin is ≤10℃;

[0105] Condition 3: The power battery system 5 detects the insulation resistance of the entire high-voltage system in real time, and the insulation resistance of the entire high-voltage system is ≥ 500Ω / V;

[0106] Condition 4: The minimum value of the power battery cell voltage Umin ≥ 3.0V;

[0107] Condition 5: The battery management system determines that the heating contactor and the main negative contactor have no adhesion fault;

[0108] When the above conditions are met, the power battery system 5 gives feedback to the vehicle controller 4 to allow the vehicle to enter the heating state. After receiving the feedback, the vehicle controller 4 sends a command to the power battery system 5 to close the main negative contactor. After receiving the command, the power battery system 5 executes the closing of the main negative contactor and feeds back the closing state to the vehicle controller 4. After the power battery system 5 closes the main negative contactor, it delays for 2S and closes the heating contactor, and feeds back the heating contactor state to the vehicle controller 4. At this time, after the heating contactor is closed, the heating film starts to work to heat the power battery.

[0109] When any one of the above five conditions is not met, the vehicle controller 4 will feedback the heating start failure to the remote vehicle monitoring terminal 3, and the remote vehicle monitoring terminal 3 will feedback the heating start failure information to the remote monitoring service platform 2, and the remote monitoring service platform 2 will feedback the information to the remote control terminal 1;

[0110] b. After the heating film is started, the battery management system extracts the battery heating temperature rise data according to the collected Tmin temperature value, calculates the time required for the temperature to rise from Tmin to 15°C, and transmits the heating time to the remote control terminal 1 through the remote monitoring service platform 2. The user arranges travel reasonably according to the heating time displayed on the remote control terminal 1;

[0111] c. After receiving the main negative contactor and the heating contactor energizing status feedback from the power battery system 5, the vehicle controller 4 sends a command to the high-voltage distribution box 6 to energize the accessory contactor. After receiving the energizing command, the high-voltage distribution box 6 energizes the accessory contactor and feeds back the energizing status to the vehicle controller 4;

[0112] After the vehicle controller 4 receives the accessory contactor closure status feedback from the high-voltage distribution box 6, it sends a work enable signal to the DC-DC controller 7. After receiving the work enable, the DC-DC controller 7 starts working. The power battery system 5 supplies high voltage electricity to the DC-DC controller 7 through the high-voltage distribution box 6. The DC-DC controller 7 converts the high voltage electricity output by the power battery system 5 into 12V low voltage electricity to supply the on-board 12V battery 8. The on-board 12V battery 8 supplies power to the 12V low voltage equipment of the vehicle to ensure continuous power supply to all equipment.

[0113] Step 6: Stop heating. After the battery heating is turned on, stop heating when Tmax-Tmin≥10℃ or Tmax>30℃ or Tmin>15℃ or the heating time exceeds 2h during the heating process;

[0114] Stop the heating process. The vehicle controller 4 first sends an instruction to stop the DC-DC controller 7. After confirming that the DC-DC controller 7 stops working, it sends an instruction to the high-voltage distribution box 6 to disconnect the accessory contactor. After receiving the feedback that the accessory contactor is disconnected, the vehicle controller 4 sends an instruction to disconnect the main negative contactor to the power battery system 5. After receiving the instruction, the power battery system 5 disconnects the main negative contactor. After confirming that the main negative contactor is disconnected, it delays 2 seconds to disconnect the heating contactor, and feeds back the status of all contactors to the vehicle controller 4. At the same time, the heating status is fed back to the remote vehicle monitoring terminal 3. The final information will be transmitted to the remote control terminal 1. The user can see the status information and key information of the power battery. After the vehicle controller 4 confirms that all components are powered off, the vehicle controller 4 sends a sleep instruction through the CAN bus, and the system enters sleep. After receiving the sleep instruction, the remote vehicle monitoring terminal 3 delays 5 minutes before entering sleep;

[0115] When the remote heating system is working, if the key is inserted to start the vehicle, the vehicle controller 4 detects the key ON signal and sends a stop heating instruction to the power battery system 5. After the power battery system 5 receives the ON signal and the stop heating instruction at the same time, the heating function is completely taken over by the power battery system 5 and enters the driving heating state. The power battery system 5 determines whether to perform heating or exit heating according to the driving heating conditions.

[0116] In the fifth step, when the battery heating is turned on and reaches the heating temperature or a system failure occurs during the heating process, when the vehicle controller 4 receives a shutdown request due to a serious failure of the DC-DC controller 7 or the high-voltage distribution box 6, the vehicle controller 4 first sends an instruction to stop the DC-DC controller 7, and then sends an instruction to the high-voltage distribution box 6 to disconnect the accessory contactor after confirming that the DC-DC controller 7 stops working. After the vehicle controller 4 receives feedback that the accessory contactor is disconnected, it sends an instruction to disconnect the main negative contactor to the power battery system 5. After receiving the instruction, the power battery system 5 disconnects the main negative contactor, and after confirming that the main negative contactor is disconnected, it delays 2 seconds to disconnect the heating contactor, and feeds back the status of all contactors to the vehicle controller 4, and feeds back the heating status to the remote vehicle monitoring terminal 3. Finally, the information will be transmitted to the remote control terminal 1, and the user can see the status information and key information of the power battery. After the vehicle controller 4 confirms that the high voltage of all components is powered off, the vehicle controller 4 sends a sleep instruction through the CAN bus, and the system enters sleep. After receiving the sleep instruction, the remote vehicle monitoring terminal 3 delays 5 minutes before entering sleep.

[0117] Embodiment 2:

[0118] Embodiment 2 is substantially the same as Embodiment 1, except that:

[0119] The remote monitoring service platform 2 obtains and stores the battery remaining capacity SOC, cell temperature, cell voltage, total voltage, current, heating time, and heating status data of the power battery system 5 on the vehicle through the remote vehicle monitoring terminal 3;

[0120] The remote control terminal 1 is a mobile phone with a remote heating program APP installed and has the function of connecting to the telecommunications operator's network; the remote control terminal 1 can query the remote monitoring service platform 2 for the battery remaining power, single cell temperature, single cell voltage, total voltage, current, heating time, and heating status data information of the power battery system 5 on its corresponding vehicle, and the remote control terminal 1 can send instructions to its corresponding remote vehicle-mounted monitoring terminal 3 to turn on and off the battery heating through the remote monitoring service platform 2;

[0121] The remote vehicle monitoring terminal 3 has a telecommunications operator network function and a CAN wake-up function.

[0122] In the first step, the vehicle controller 4 sends the stored ICCID information in the specific ID to the vehicle CAN network. The data in the specific ID includes ICCID information, heartbeat information and check code information, wherein the heartbeat information is used to indicate whether the vehicle controller 4 is online and whether the operation is normal; after the remote vehicle monitoring terminal 3 is bound to the vehicle controller 4 for the first time, the remote vehicle monitoring terminal 3 starts the comparison verification, which includes:

[0123] A. When the remote vehicle monitoring terminal does not receive the ICCID message with a specific ID sent by the vehicle controller 4 for 30 consecutive cycles, it considers that the vehicle controller 4 is offline. One cycle is 1000ms. The remote vehicle monitoring terminal 3 feeds back the offline information to the remote monitoring service platform 2. After receiving the message, the remote monitoring service platform 2 will not respond to any operation instructions from the remote control terminal 1.

[0124] B. After receiving the ICCID message of the specific ID sent by the vehicle controller 4, the remote vehicle monitoring terminal 3 performs a real-time comparison. When the ICCID number in the specific ID sent by the vehicle controller 4 is inconsistent with the ICCIC number stored in the remote vehicle monitoring terminal 3 and lasts for more than 10 cycles, it is considered that the vehicle controller 4 has been replaced and is not in the factory state, and this information is fed back to the remote monitoring service platform 2. After receiving this information, the remote monitoring service platform 2 will not respond to any operation instructions of the remote control terminal 1;

[0125] C. After receiving the ICCID message of a specific ID sent by the vehicle controller 4, the remote vehicle monitoring terminal 3 processes the heartbeat signal and verification information in the message data. If the heartbeat information or verification information is abnormal, the remote monitoring service platform 2 will feedback the information to the remote monitoring service platform 2. After receiving the information, the remote monitoring service platform 2 will not respond to any operation instructions of the remote control terminal 1.

[0126] For safety reasons, any abnormal conditions in A, B, and C that occur when the remote vehicle monitoring terminal 3 is turned on for comparison and verification must be handled at an authorized 4S store.

Claims

1. A remote power battery heating system for a pure electric vehicle, characterized in that: The remote power battery heating system comprises: a remote control terminal (1), a remote monitoring service platform (2), a remote vehicle-mounted monitoring terminal (3) and a vehicle controller (4); the remote control terminal (1) is wirelessly connected to the remote monitoring service platform (2) via a telecommunications operator network; the remote monitoring service platform (2) is wirelessly connected to the remote vehicle-mounted monitoring terminal (3) via a telecommunications operator network; the remote vehicle-mounted monitoring terminal (3), the vehicle controller (4), the power battery system (5), the high-voltage distribution box (6) and the DC-DC controller (7) are all connected to the CAN bus signal. The positive and negative electrodes of the power battery system (5) are connected to the positive and negative electrodes of the main power distribution interface of the high-voltage distribution box (6) through a high-voltage cable, and the positive and negative electrodes of the auxiliary power distribution interface of the high-voltage distribution box (6) are connected to the positive and negative electrodes of the on-board 12V battery (8) through a DC-DC controller (7). The DC-DC controller (7) is a DC-DC direct current step-down conversion circuit. The on-board 12V battery (8) provides low-voltage power supply for the remote on-board monitoring terminal (3), the vehicle controller (4), the power battery system (5), the high-voltage distribution box (6) and the DC-DC controller (7). The power battery system (5) comprises a battery management system, a heating film and a control system of the heating film; The parking heating process of the remote power battery heating system is as follows: when the vehicle is parked and the key is in the OFF position, the vehicle controller (4) uploads the vehicle status to the remote vehicle monitoring terminal (3), the remote vehicle monitoring terminal (3) transmits the relevant information to the remote monitoring service platform (2), and the remote monitoring service platform (2) saves the last status of the vehicle; when the remote control terminal (1) is connected to the remote monitoring service platform (2), the relevant vehicle information is transmitted to the remote control terminal (1), and the remote heating function can only be used when the vehicle is in a parking and power-off state and the battery heating function option of the remote control terminal (1) is in a valid state; after the remote control terminal (1) is connected to the remote monitoring service platform (2) through the telecommunications operator network and a heating request is turned on, the remote monitoring service platform (2) sends the heating instruction to the remote vehicle monitoring terminal (3) of the corresponding vehicle through the telecommunications operator network in the form of wireless transmission, and the remote vehicle monitoring terminal (3) in a dormant state is activated after receiving the command from the remote monitoring service platform (2), and the remote vehicle monitoring terminal (3) in the activated state wakes up the vehicle controller through the CAN bus using the CAN activation method. (4) and sends a heating instruction; after the vehicle controller (4) is awakened and receives the heating instruction, the vehicle controller (4) awakens the power battery system (5), the high-voltage distribution box (6) and the DC-DC controller (7) through the CAN bus by using CAN activation. After awakening, the power battery system (5), the high-voltage distribution box (6) and the DC-DC controller (7) perform fault self-test and feed back the self-test status to the vehicle controller (4). When the vehicle controller (4) receives the self-test normal signal from the power battery system (5), the high-voltage distribution box (6) and the DC-DC controller (7), the vehicle controller (4) After the signal is received, the vehicle controller (4) sends a heating instruction to the power battery system (5). When the vehicle controller (4) receives any self-test abnormality signal from the power battery system (5), the high-voltage distribution box (6) and the DC-DC controller (7), the vehicle controller (4) sends a message indicating that the self-test abnormality cannot be heated to the remote vehicle monitoring terminal (3) via the CAN bus. The remote vehicle monitoring terminal (3) sends a message indicating that the self-test abnormality cannot be heated to the remote control terminal (1) via the remote monitoring service platform (2). The remote control terminal (1) displays a related prompt indicating that the self-test abnormality cannot be heated. System safety strategy and low-voltage power supply method in the heating process of the remote power battery heating system: a. After the power battery system (5) receives the heating instruction, the power battery system (5) starts to determine whether the heating conditions are met: Condition 1: Remaining power ≥ 20%; Condition 2: The minimum temperature Tmin of the power battery cell is between -20℃ and 15℃, and the maximum temperature Tmax of the power battery cell is ≤30℃, and Tmax-Tmin is ≤10℃; Condition 3: The power battery system (5) detects the insulation resistance of the entire high-voltage system in real time. The insulation resistance of the entire high-voltage system is ≥ 500Ω / V; Condition 4: The minimum value of the power battery cell voltage Umin ≥ 3.0V; Condition 5: The battery management system determines that the heating contactor and the main negative contactor have no adhesion fault; When the above conditions are met, the power battery system (5) feeds back to the vehicle controller (4) that it is allowed to enter the heating state. After receiving the feedback, the vehicle controller (4) sends a command to the power battery system (5) to pull in the main negative contactor. After receiving the command, the power battery system (5) executes the pull-in of the main negative contactor and feeds back the pull-in state to the vehicle controller (4). After the power battery system (5) pulls in the main negative contactor, it pulls in the heating contactor after a delay of 2S, and feeds back the state of the heating contactor to the vehicle controller (4). At this time, after the heating contactor is pulled in, the heating film starts to work to heat the power battery. When any one of the above five conditions is not met, the vehicle controller (4) feeds back the heating start failure to the remote vehicle monitoring terminal (3), and the remote vehicle monitoring terminal (3) feeds back the heating start failure information to the remote monitoring service platform (2), and the remote monitoring service platform (2) feeds back the information to the remote control terminal (1); b. After the heating film is activated, the battery management system extracts the battery heating temperature rise data according to the collected Tmin temperature value, calculates the time required for the temperature to rise from Tmin to 15° C., and transmits the heating time to the remote control terminal (1) through the remote monitoring service platform (2). The user arranges travel reasonably according to the heating time displayed on the remote control terminal (1); c. After receiving the main negative contactor and the heating contactor energized status feedback from the power battery system (5), the vehicle controller (4) sends a command to the high-voltage distribution box (6) to energize the accessory contactor. After receiving the energizing command, the high-voltage distribution box (6) energizes the accessory contactor and feeds back the energizing status to the vehicle controller (4); After the vehicle controller (4) receives the accessory contactor energization state fed back by the high-voltage distribution box (6), it sends a work enable signal to the DC-DC controller (7). After receiving the work enable signal, the DC-DC controller (7) starts working. The power battery system (5) supplies high voltage electricity to the DC-DC controller (7) through the high-voltage distribution box (6). The DC-DC controller (7) converts the high voltage electricity output by the power battery system (5) into 12V low voltage electricity to supply the on-board 12V storage battery (8). The on-board 12V storage battery (8) supplies power to the 12V low voltage equipment of the vehicle, thereby ensuring continuous power supply to all equipment. The stopping heating condition of the remote power battery heating system is that after the battery heating is turned on, the heating is stopped when Tmax-Tmin≥10°C or Tmax>30°C or Tmin>15°C or the heating time exceeds 2h during the heating process.

2. A remote power battery heating system for a pure electric vehicle according to claim 1, characterized in that: The remote monitoring service platform (2) obtains the battery remaining capacity SOC, cell temperature, cell voltage, total voltage, current, heating time, and heating status data of the power battery system (5) on the vehicle through the remote vehicle-mounted monitoring terminal (3) and stores the data; The remote control terminal (1) is a mobile phone installed with a remote heating program APP and has the function of connecting to the network of a telecommunications operator; the remote control terminal (1) can query the remote monitoring service platform (2) for the battery remaining power, cell temperature, cell voltage, total voltage, current, heating time, and heating status data information of the power battery system (5) on its corresponding vehicle; the remote control terminal (1) can send instructions for turning on and off battery heating to its corresponding remote vehicle monitoring terminal (3) through the remote monitoring service platform (2); The remote vehicle-mounted monitoring terminal (3) has a telecommunications operator network function and a CAN wake-up function.

3. A remote power battery heating system for a pure electric vehicle according to claim 1 or 2, characterized in that: The remote vehicle monitoring terminal (3) is provided with a binding information comparison module, and the binding information comparison module is used to compare the consistency of the terminal's own ICCID number with the ICCID number in a specific message sent by the vehicle controller (4) via CAN; The vehicle controller (4) is provided with a binding storage unit, and the binding storage unit is used to store the ICCID number sent by the remote vehicle monitoring terminal (3) via CAN.

4. A remote power battery heating system for a pure electric vehicle according to claim 3, characterized in that: The power battery system (5) comprises a battery management system, a heating film and a control system for the heating film, a main negative circuit in the battery management system is provided with a main negative contactor, the power battery in the battery management system is composed of a plurality of power battery cells connected in series, a fuse is provided on the negative circuit of the power battery, and a heating film contactor is provided at each end of the positive and negative electrodes of the heating film in the control system of the heating film.

5. A remote power battery heating system for a pure electric vehicle according to claim 4, characterized in that: The vehicle controller (4) collects data from the power battery system (5), the high-voltage distribution box (6) and the DC-DC controller (7) via the CAN bus, and the vehicle controller (4) controls the power battery system (5), the high-voltage distribution box (6) and the DC-DC controller (7) via the CAN bus.

6. A control method for a remote power battery heating system for a pure electric vehicle according to any one of claims 1 to 5, characterized in that: The control method comprises the following steps: Step 1: Binding of the remote vehicle monitoring terminal (3) and the vehicle controller (4). After the vehicle is assembled and off the assembly line, and the vehicle is powered on at low voltage, the remote vehicle monitoring terminal (3) sends the ICCID number on its own device to the vehicle CAN network through a specific ID. When the vehicle controller (4) receives the ID in the vehicle CAN network, it turns on the storage function to store the ICCID information in the ID into a specific storage module. After the storage is successful, the user cannot change it by himself. If the user needs to change it, he needs to obtain the authorization of the host manufacturer to perform the change operation on the specific host computer. The vehicle controller (4) stores the stored ICCID information in the specific ID. The remote vehicle monitoring terminal (3) stops sending the ICCID number of the device after receiving the ICCID message with the specific ID sent by the vehicle controller (4) in the vehicle CAN network; after the remote vehicle monitoring terminal (3) receives the ICCID number in the specific ID, the binding information comparison module starts working, and the binding information comparison module retrieves its own ICCID number in the storage module and compares it with the ICCID number sent by the remote vehicle monitoring terminal (3) in the CAN network. After the comparison is successful, the remote vehicle monitoring terminal (3) sends the binding success message to the remote monitoring service platform (2); Step 2: Binding and activating the remote vehicle monitoring terminal (3) and the remote monitoring service platform (2); First, the vehicle information that needs to be activated and bound is maintained in the database of the remote monitoring service platform (2), and the ICCID number of the remote vehicle monitoring terminal (3) installed on the vehicle and the VIN code of the corresponding vehicle are transmitted to the remote monitoring service platform (2) for storage and real-time query; After the remote vehicle monitoring terminal (3) is successfully bound to the vehicle controller (4), the remote vehicle monitoring terminal (3) sends the ICCID number of the device and binding success information to the remote monitoring service platform (2). After receiving the ICCID number and binding information sent by the remote vehicle monitoring terminal (3), the remote monitoring service platform (2) searches the database to see whether the corresponding ICCID number is already stored. If the corresponding ICCID number is not found within a set time, the remote monitoring service platform (2) is fed back information that the corresponding ICCID number is not found, and re-queries are performed every 5 minutes; if the corresponding ICCID number is found within the set time, the remote vehicle monitoring terminal (3) is checked to see whether the special flag bit in the binding information between the remote vehicle monitoring terminal (3) and the vehicle controller (4) is set; if there is set information, the remote vehicle monitoring terminal (3) is activated and online on the remote monitoring service platform (2) and the binding is successful; if there is no set information, the binding is unsuccessful, and the remote monitoring service platform (2) is fed back information that the binding is unsuccessful, and the set information is checked again every 5 minutes; Step 3: The remote control terminal (1) logs in to the remote monitoring service platform (2) through the registered account, and enters the ICCID number of the remote on-board monitoring terminal (3) on the corresponding vehicle for binding. After the binding is successful, the remote control terminal (1) can be used to exchange information and control battery heating with the remote on-board monitoring terminal (3) through the remote monitoring service platform (2); Step 4: Parking heating process. When the vehicle is parked and the key is in the OFF position, the vehicle controller (4) uploads the vehicle status to the remote vehicle monitoring terminal (3). The remote vehicle monitoring terminal (3) transmits the relevant information to the remote monitoring service platform (2). The remote monitoring service platform (2) saves the last status of the vehicle. When the remote control terminal (1) is connected to the remote monitoring service platform (2), the relevant vehicle information will be transmitted to the remote control terminal (1). Only when the vehicle is in a parked and powered-off state and the battery heating function option of the remote control terminal (1) is in a valid state, can the remote heating function be used. After the remote control terminal (1) is connected to the remote monitoring service platform (2) through the telecommunications operator network and turns on the heating request, the remote monitoring service platform (2) sends the heating instruction to the remote vehicle monitoring terminal (3) of the corresponding vehicle through the telecommunications operator network in the form of wireless transmission. The remote vehicle monitoring terminal (3) in a dormant state is activated after receiving the command from the remote monitoring service platform (2). The activated remote vehicle monitoring terminal (3) wakes up the vehicle controller (4) through the CAN bus using the CAN activation method and downloads A heating instruction is issued; after the vehicle controller (4) is awakened and receives the heating instruction, the vehicle controller (4) awakens the power battery system (5), the high-voltage distribution box (6) and the DC-DC controller (7) through the CAN bus by using a CAN activation method; the awakened power battery system (5), the high-voltage distribution box (6) and the DC-DC controller (7) perform a fault self-check and feed back the self-check status to the vehicle controller (4); when the vehicle controller (4) receives a normal self-check signal from the power battery system (5), the high-voltage distribution box (6) and the DC-DC controller (7), The vehicle controller (4) sends a heating instruction to the power battery system (5). When the vehicle controller (4) receives any self-test abnormality signal from the power battery system (5), the high-voltage distribution box (6) and the DC-DC controller (7), the vehicle controller (4) sends a message indicating that the self-test abnormality cannot be heated to the remote vehicle monitoring terminal (3) via the CAN bus. The remote vehicle monitoring terminal (3) sends a message indicating that the self-test abnormality cannot be heated to the remote control terminal (1) via the remote monitoring service platform (2). The remote control terminal (1) displays a related prompt indicating that the self-test abnormality cannot be heated. Step 5: System safety strategy and low-voltage power supply method in the heating process: a. After the power battery system (5) receives the heating instruction, the power battery system (5) starts to determine whether the heating conditions are met: Condition 1: Remaining power ≥ 20%; Condition 2: The minimum temperature Tmin of the power battery cell is between -20℃ and 15℃, and the maximum temperature Tmax of the power battery cell is ≤30℃, and Tmax-Tmin is ≤10℃; Condition 3: The power battery system (5) detects the insulation resistance of the entire high-voltage system in real time. The insulation resistance of the entire high-voltage system is ≥ 500Ω / V; Condition 4: The minimum value of the power battery cell voltage Umin ≥ 3.0V; Condition 5: The battery management system determines that the heating contactor and the main negative contactor have no adhesion fault; When the above conditions are met, the power battery system (5) feeds back to the vehicle controller (4) that it is allowed to enter the heating state. After receiving the feedback, the vehicle controller (4) sends a command to the power battery system (5) to pull in the main negative contactor. After receiving the command, the power battery system (5) executes the pull-in of the main negative contactor and feeds back the pull-in state to the vehicle controller (4). After the power battery system (5) pulls in the main negative contactor, it pulls in the heating contactor after a delay of 2S, and feeds back the state of the heating contactor to the vehicle controller (4). At this time, after the heating contactor is pulled in, the heating film starts to work to heat the power battery. When any one of the above five conditions is not met, the vehicle controller (4) feeds back the heating start failure to the remote vehicle monitoring terminal (3), and the remote vehicle monitoring terminal (3) feeds back the heating start failure information to the remote monitoring service platform (2), and the remote monitoring service platform (2) feeds back the information to the remote control terminal (1); b. After the heating film is activated, the battery management system extracts the battery heating temperature rise data according to the collected Tmin temperature value, calculates the time required for the temperature to rise from Tmin to 15° C., and transmits the heating time to the remote control terminal (1) through the remote monitoring service platform (2). The user arranges travel reasonably according to the heating time displayed on the remote control terminal (1); c. After receiving the main negative contactor and the heating contactor energized status feedback from the power battery system (5), the vehicle controller (4) sends a command to the high-voltage distribution box (6) to energize the accessory contactor. After receiving the energizing command, the high-voltage distribution box (6) energizes the accessory contactor and feeds back the energizing status to the vehicle controller (4); After the vehicle controller (4) receives the accessory contactor energization state fed back by the high-voltage distribution box (6), it sends a work enable signal to the DC-DC controller (7). After receiving the work enable signal, the DC-DC controller (7) starts working. The power battery system (5) supplies high voltage electricity to the DC-DC controller (7) through the high-voltage distribution box (6). The DC-DC controller (7) converts the high voltage electricity output by the power battery system (5) into 12V low voltage electricity to supply the on-board 12V storage battery (8). The on-board 12V storage battery (8) supplies power to the 12V low voltage equipment of the vehicle, thereby ensuring continuous power supply to all equipment. Step 6: Stop heating. After the battery heating is turned on, stop heating when Tmax-Tmin≥10℃ or Tmax>30℃ or Tmin>15℃ or the heating time exceeds 2h during the heating process; Stop the heating process. The vehicle controller (4) first sends a command to stop the DC-DC controller (7). After confirming that the DC-DC controller (7) has stopped working, it sends a command to the high-voltage distribution box (6) to disconnect the accessory contactor. After receiving feedback that the accessory contactor is disconnected, the vehicle controller (4) sends a command to disconnect the main negative contactor to the power battery system (5). After receiving the command, the power battery system (5) disconnects the main negative contactor. After confirming that the main negative contactor is disconnected, it delays 2 seconds to disconnect the heating contactor, and feeds back the status of all contactors to the vehicle controller (4). At the same time, the heating status is fed back to the remote vehicle monitoring terminal (3). Finally, the information is transmitted to the remote control terminal (1). The user can see the status information and key information of the power battery. After the vehicle controller (4) confirms that the high voltage of all components is powered off, the vehicle controller (4) sends a sleep command through the CAN bus, and the system enters sleep. After receiving the sleep command, the remote vehicle monitoring terminal (3) delays 5 minutes before entering sleep. When the remote heating system is working, if the key is inserted to start the vehicle, the vehicle controller (4) detects the key ON position signal and sends a stop heating instruction to the power battery system (5). After the power battery system (5) receives the ON position signal and the stop heating instruction at the same time, the heating function is completely taken over by the power battery system (5) and enters the driving heating state. The power battery system (5) determines whether to perform heating or exit heating according to the driving heating conditions.

7. The control method of a remote power battery heating system for a pure electric vehicle according to claim 6, characterized in that: In the first step, the vehicle controller (4) sends the stored ICCID information in the specific ID to the vehicle CAN network, wherein the data in the specific ID includes ICCID information, heartbeat information and check code information, wherein the heartbeat information is used to indicate whether the vehicle controller (4) is online and whether the operation is normal; After the first binding between the remote vehicle monitoring terminal (3) and the vehicle controller (4) is completed, the remote vehicle monitoring terminal (3) starts a comparison verification process, which includes: A. When the remote vehicle monitoring terminal (3) does not receive the ICCID message with a specific ID sent by the vehicle controller (4) for 30 consecutive cycles, it considers that the vehicle controller (4) is offline. One cycle is 1000ms. The remote vehicle monitoring terminal (3) feeds back the offline information to the remote monitoring service platform (2). After receiving the message, the remote monitoring service platform (2) will not respond to any operation instructions of the remote control terminal (1); B. After receiving the ICCID message of the specific ID sent by the vehicle controller (4), the remote vehicle monitoring terminal (3) performs a real-time comparison. When the ICCID number in the specific ID sent by the vehicle controller (4) is inconsistent with the ICCIC number stored in the remote vehicle monitoring terminal (3) and the situation lasts for more than 10 cycles, it is considered that the vehicle controller (4) has been replaced and is not in the factory state, and this information is fed back to the remote monitoring service platform (2). After receiving this information, the remote monitoring service platform (2) will not respond to any operation instructions of the remote control terminal (1); C. After receiving the ICCID message with a specific ID sent by the vehicle controller (4), the remote vehicle monitoring terminal (3) processes the heartbeat signal and verification information in the message data. If the heartbeat information or verification information is abnormal, the remote monitoring service platform (2) will feedback the information. After receiving the information, the remote monitoring service platform (2) will not respond to any operation instructions of the remote control terminal (1); When the above remote vehicle monitoring terminal (3) starts the comparison and verification, any abnormal conditions in A, B, and C that appear must be handled at an authorized 4S store for safety reasons.

8. The control method of a remote power battery heating system for a pure electric vehicle according to claim 6, characterized in that: In the fifth step, when the battery heating is turned on and reaches the heating temperature or a system fault occurs during the heating process, the vehicle controller (4) receives a request for shutdown due to a serious fault of the DC-DC controller (7) or the high-voltage distribution box (6). The vehicle controller (4) first sends an instruction to stop the operation of the DC-DC controller (7). After confirming that the DC-DC controller (7) has stopped working, it sends an instruction to the high-voltage distribution box (6) to disconnect the accessory contactor. After receiving feedback that the accessory contactor is disconnected, the vehicle controller (4) sends an instruction to disconnect the main negative contactor to the power battery system (5). The power battery system (5) ) disconnects the main negative contactor after receiving the command, and disconnects the heating contactor after confirming that the main negative contactor is disconnected after a delay of 2 seconds, and feeds back the status of all contactors to the vehicle controller (4), and at the same time feeds back the heating status to the remote vehicle monitoring terminal (3). Finally, the information will be transmitted to the remote control terminal (1). The user can see the status information and key information of the power battery. After the vehicle controller (4) confirms that the high voltage of all components is powered off, the vehicle controller (4) sends a sleep command through the CAN bus, and the system enters sleep. After receiving the sleep command, the remote vehicle monitoring terminal (3) delays for 5 minutes before entering sleep.

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