Vehicle thermal management system control method, device and vehicle

Abstract

The present application provides a vehicle thermal management system control method, device, and vehicle, which are applied to a vehicle thermal management system. The vehicle thermal management system includes a battery heating circuit and a heat pump heating circuit connected to the vehicle motor. The vehicle thermal management system control method includes: obtaining the vehicle's current motor water outlet temperature, the battery cell minimum temperature, and the external ambient temperature; making a judgment based on the motor water outlet temperature, the battery cell minimum temperature, the external ambient temperature, and / or whether a heat pump heating request signal is received, so as to turn on the battery heating circuit or the heat pump heating circuit. The vehicle thermal management system control method, device, and vehicle provided in the present application are simple and convenient, can reduce the operating frequency of high-energy-consuming heating components, reduce the thermal management energy consumption of the entire vehicle, improve energy utilization, and increase the vehicle's endurance.

Description

Technical Field

[0001] The present application relates to the field of vehicle thermal management technology, and in particular to a vehicle thermal management system control method, device and vehicle. Background Art

[0002] With the development of the vehicle industry, vehicles are increasingly involved in our daily lives and work, especially electric vehicles, which have been widely used due to their low cost and environmental friendliness. The thermal management system of electric vehicles is closely related to the powertrain system and the cockpit. Only at the appropriate temperature can the requirements of user comfort and vehicle safety and stability be met, resulting in very high energy consumption of the thermal management system during heating, which will reduce vehicle endurance.

[0003] Some thermal management system control methods utilize the waste heat generated by the vehicle's motor, but the energy utilization rate is low. Therefore, there is an urgent need for a thermal management system control method that can more efficiently and reasonably utilize the motor's waste heat. Summary of the Invention

[0004] In view of this, the purpose of this application is to propose a vehicle thermal management system control method, device and vehicle to solve the technical problem of low motor waste heat utilization rate.

[0005] In a first aspect of the present application, a vehicle thermal management system control method is provided, wherein the vehicle thermal management system includes a battery heating circuit and a heat pump heating circuit connected to the vehicle motor, and the vehicle thermal management system control method includes: obtaining the vehicle's current motor water outlet temperature, the battery cell minimum temperature and the external ambient temperature; judging based on the motor water outlet temperature, the battery cell minimum temperature, the external ambient temperature and / or whether a heat pump heating request signal is received to start the battery heating circuit or the heat pump heating circuit.

[0006] Furthermore, obtaining the vehicle's current motor water outlet temperature, battery cell minimum temperature and external ambient temperature includes: obtaining the vehicle's current whole vehicle mode; when the whole vehicle mode is driving mode, obtaining the vehicle's current motor water outlet temperature, battery cell minimum temperature and external ambient temperature.

[0007] Furthermore, obtaining the vehicle's current motor water outlet temperature, battery cell minimum temperature and external ambient temperature includes: obtaining the vehicle's current vehicle thermal management system detection signal and thermal management mode; when the vehicle thermal management system detection signal is a fault-free signal, the thermal management mode is not a liquid filling mode, a battery temperature equalization mode and a cockpit passive cooling mode, and no battery active heating instruction is received, then obtaining the vehicle's current motor water outlet temperature, the battery cell minimum temperature and the external ambient temperature.

[0008] Furthermore, the judgment based on the motor water outlet temperature, the minimum temperature of the battery cell, the external ambient temperature and / or whether a heat pump heating request signal is received to start the battery heating circuit or the heat pump heating circuit includes: when the external ambient temperature is less than or equal to a first preset ambient temperature, and the motor water outlet temperature and the minimum temperature of the battery cell meet a preset battery heating condition, then starting the battery heating circuit; or, when the external ambient temperature is greater than the first preset ambient temperature and less than or equal to a second preset ambient temperature, and the heat pump heating request signal is received, then starting the heat pump heating circuit; or, when the external ambient temperature is greater than the second preset ambient temperature and less than or equal to a third preset ambient temperature, the motor water outlet temperature and the minimum temperature of the battery cell meet the battery heating condition, and the heat pump heating request signal is received. When the heat pump heating request signal is received, the heat pump heating circuit is turned on, and after the preset heating time, the heat pump heating circuit is turned off and the battery heating circuit is turned on; or, when the external ambient temperature is greater than the second preset ambient temperature and less than or equal to the third preset ambient temperature, the motor water outlet temperature and the minimum temperature of the battery cell meet the battery heating condition, and the heat pump heating request signal is not received, the battery heating circuit is turned on; or, when the external ambient temperature is greater than the third preset ambient temperature, and the motor water outlet temperature and the minimum temperature of the battery cell meet the battery heating condition, the battery heating circuit is turned on; or, when the motor water outlet temperature and the minimum temperature of the battery cell do not meet the battery heating condition and the heat pump heating request signal is received, the heat pump heating circuit is turned on.

[0009] Furthermore, the battery heating conditions include: the motor water outlet temperature is less than or equal to a first preset motor temperature, the battery cell minimum temperature is less than or equal to the first preset cell temperature, and the difference between the motor water outlet temperature and the battery cell minimum temperature is greater than the first preset difference temperature.

[0010] Furthermore, the vehicle motor is also connected to a heat storage circuit, and the vehicle thermal management system control method also includes: when the external ambient temperature, the motor water outlet temperature and the minimum temperature of the battery cell meet the preset heat storage preparation conditions, obtaining the current vehicle speed and the on / off status of the battery heating circuit; when the vehicle speed, the on / off status of the battery heating circuit, the motor water outlet temperature and the minimum temperature of the battery cell meet the preset heat storage start conditions, starting the heat storage circuit.

[0011] Furthermore, the heat storage preparation conditions include: the external ambient temperature is less than or equal to the first preset ambient temperature, the motor water outlet temperature is less than or equal to the first preset motor temperature, and the lowest battery cell temperature is less than or equal to the first preset cell temperature; or, the external ambient temperature is greater than the second preset ambient temperature, the motor water outlet temperature is less than or equal to the first preset motor temperature, and the lowest battery cell temperature is less than or equal to the first preset cell temperature.

[0012] Furthermore, the heat storage start-up condition includes: the on / off state of the battery heating circuit is closed, the vehicle speed is greater than a first preset speed, and the difference between the motor water outlet temperature and the lowest battery cell temperature is less than or equal to the first preset difference temperature; or, the on / off state of the battery heating circuit is open, the vehicle speed is greater than the first preset speed, and the difference between the motor water outlet temperature and the lowest battery cell temperature is less than or equal to a second preset difference temperature, wherein the second preset difference temperature is lower than the first preset difference temperature.

[0013] Furthermore, the vehicle thermal management system control method also includes: when the motor water outlet temperature and / or the battery cell minimum temperature meets the preset waste heat recovery shutdown condition, closing the battery heating circuit and / or the heat pump heating circuit.

[0014] Furthermore, the waste heat recovery shutdown condition includes: the motor water outlet temperature is greater than the second preset motor temperature, and the second preset motor temperature is greater than the first preset motor temperature; or, the battery cell minimum temperature is greater than the second preset battery cell temperature, and the second preset battery cell temperature is greater than the first preset battery cell temperature; or, the difference between the motor water outlet temperature and the battery cell minimum temperature is less than or equal to the second preset difference temperature, and the vehicle speed is less than the second preset speed, wherein the second preset speed is less than the first preset speed.

[0015] According to a second aspect of the present application, a vehicle thermal management system control device is provided, wherein the vehicle thermal management system includes a battery heating circuit and a heat pump heating circuit connected to the vehicle motor, and the vehicle thermal management system control device includes: an acquisition module configured to obtain the vehicle's current motor water outlet temperature, the battery cell minimum temperature and the external ambient temperature; a waste heat recovery module configured to make a judgment based on the motor water outlet temperature, the battery cell minimum temperature, the external ambient temperature and / or whether a heat pump heating request signal is received, so as to start the battery heating circuit or the heat pump heating circuit.

[0016] In a third aspect of the present application, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the vehicle thermal management system control method as described in the first aspect above is implemented.

[0017] In a fourth aspect of the present application, a vehicle is provided, comprising: a controller, wherein the controller is configured to execute the vehicle thermal management system control method as described in the first aspect above.

[0018] In a fifth aspect of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the vehicle thermal management system control method as described in the first aspect above.

[0019] As can be seen from the above, the present application provides a vehicle thermal management system control method, device, and vehicle. By obtaining the current motor water outlet temperature, battery cell minimum temperature, and ambient temperature of the vehicle, a basis for transferring and utilizing motor waste heat is provided. The vehicle motor is connected to a battery heating circuit. By turning on the battery heating circuit, the motor waste heat can be transferred to the battery for heating utilization, thereby reducing the thermal management energy consumption of the entire vehicle and allowing the battery to operate at a suitable temperature to ensure working efficiency. The vehicle motor is connected to a heat pump heating circuit. By turning on the heat pump heating circuit, the motor waste heat can be transferred to the heat pump for heating utilization, thereby reducing the thermal management energy consumption of the entire vehicle and thereby increasing the cabin temperature and improving the user experience. Based on the motor water outlet temperature, the minimum battery cell temperature, the ambient temperature, and / or whether a heat pump heating request signal is received, a judgment is made to turn on the battery heating circuit or the heat pump heating circuit, thereby more reasonably and efficiently utilizing the motor waste heat. Under different conditions, the motor waste heat can be transferred to a circuit with better utilization effect for utilization. The vehicle thermal management system control method, device, and vehicle are simple and convenient, can reduce the operating frequency of high-energy-consuming heating components, reduce the thermal management energy consumption of the entire vehicle, improve energy utilization, and increase the vehicle's endurance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in this application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are merely embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 This is a flow chart of a vehicle thermal management system control method according to an embodiment of the present application;

[0022] Figure 2This is a schematic structural diagram of a vehicle thermal management system in an embodiment of the present application;

[0023] Figure 3 This is a schematic structural diagram of a vehicle thermal management system control device in an embodiment of the present application;

[0024] Figure 4 This is a schematic structural diagram of an electronic device in an embodiment of the present application.

[0025] Reference numerals: 1. vehicle motor; 2. battery heating circuit; 3. heat pump heating circuit; 4. heat storage circuit. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of this application more clear, this application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0027] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the usual meanings understood by people with ordinary skills in the field to which the present application belongs. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0028] With the development of the vehicle industry, vehicles are increasingly involved in our daily lives and work, especially electric vehicles, which have been widely used due to their low cost and environmental friendliness. The thermal management system of electric vehicles is closely related to the powertrain system and the cockpit. The cockpit must be at an appropriate temperature to meet user comfort requirements, and a heat pump is usually used to heat the cockpit. Some key components of the powertrain system must work at an appropriate temperature to ensure vehicle safety and stability. For example, batteries have high requirements for operating temperature, and water heaters are usually used to heat the batteries when the temperature is low. This results in very high energy consumption of the thermal management system during heating, which will reduce vehicle endurance.

[0029] In order to reduce energy consumption, some thermal management system control methods utilize the waste heat generated by the vehicle's motor and use the motor waste heat for component heating. However, the motor waste heat cannot be transferred to the component for utilization under all circumstances. For example, the motor waste heat can be used for heat pump heating through a heat pump heating circuit to increase the cabin temperature. However, when the external ambient temperature is below -20°C, the air compressor (AC, Air Compressor) is not working, and the heat pump cannot be used to increase the cabin temperature. At this time, if the motor waste heat is transferred to the heat pump, it will cause waste and low energy utilization. In addition, the motor waste heat can also be transferred to other components for utilization, such as using the battery heating circuit to heat the battery, etc., but it is not clear under what specific conditions the motor waste heat should be transferred to where for better utilization. Therefore, there is an urgent need for a thermal management system control method that can more efficiently and reasonably utilize the motor waste heat.

[0030] Below, through specific embodiments and combined Figures 1 to 4 To describe the technical solution of this application in detail.

[0031] Some embodiments of the present application provide a vehicle thermal management system control method, such as Figure 2 As shown, the vehicle thermal management system includes a battery heating circuit 2 and a heat pump heating circuit 3 connected to the vehicle motor 1, as shown in FIG. Figure 1 As shown, the vehicle thermal management system control method includes the following steps:

[0032] S1. Obtain the vehicle's current motor water outlet temperature, battery cell minimum temperature, and external ambient temperature.

[0033] The battery includes multiple cells, and the temperature of each cell may be different. The lowest temperature of the battery cells is the temperature of the lowest cell.

[0034] The thermal management control unit can obtain the vehicle's current motor water outlet temperature, battery cell minimum temperature and external ambient temperature through temperature sensors, providing a basis for the transfer and utilization of motor waste heat.

[0035] S2. Make a judgment based on the motor water outlet temperature, the minimum temperature of the battery cell, the external ambient temperature and / or whether a heat pump heating request signal is received to start the battery heating circuit 2 or the heat pump heating circuit 3.

[0036] like Figure 2 As shown, the vehicle motor 1 is connected to a battery heating circuit 2. By turning on the battery heating circuit 2, the waste heat of the motor can be transferred to the battery for heating, thereby reducing the thermal management energy consumption of the entire vehicle and allowing the battery to operate at a suitable temperature to ensure working efficiency.

[0037] like Figure 2As shown, the vehicle motor 1 is also connected to a heat pump heating circuit 3. The heat pump heating circuit 3 and the battery heating circuit 2 are connected in parallel. By turning on the heat pump heating circuit 3, the waste heat of the motor can be transferred to the heat pump for heating utilization, thereby reducing the thermal management energy consumption of the entire vehicle, thereby increasing the cockpit temperature and improving the user experience.

[0038] The heat pump heating request signal can be triggered by the vehicle user and transmitted to the thermal management control unit. The vehicle thermal management system can choose to use the air heat source to heat the heat pump, or it can choose to use the motor waste heat to heat the heat pump.

[0039] The thermal management control unit can make a judgment based on the obtained motor water outlet temperature, the minimum temperature of the battery cell, the external ambient temperature, and whether the heat pump heating request signal is received to turn on the battery heating circuit 2 or the heat pump heating circuit 3. This can make more reasonable and efficient use of the motor waste heat, and under different conditions, the motor waste heat can be transferred to a circuit with better use effect for utilization.

[0040] The vehicle thermal management system control method is simple and convenient, which can reduce the operating frequency of high-energy-consuming heating components, reduce the thermal management energy consumption of the entire vehicle, improve energy utilization, and increase the vehicle's endurance.

[0041] In some embodiments, step S1 includes:

[0042] S101: Acquire the current vehicle mode of the vehicle.

[0043] The thermal management control unit can be connected to the vehicle computer to obtain the vehicle's current vehicle mode, providing a basis for obtaining the parameters required for waste heat utilization; the vehicle mode includes, for example, driving mode, power-on mode, etc., which are not specifically limited.

[0044] S102: When the vehicle mode is the driving mode, the current motor water outlet temperature, the minimum temperature of the battery cell, and the external environment temperature of the vehicle are obtained.

[0045] When the vehicle mode is driving mode, it means that the vehicle motor 1 is running and waste heat is generated. At this time, the motor outlet temperature, the minimum temperature of the battery cell and the external ambient temperature are obtained to provide a basis for the transfer and utilization of the motor waste heat.

[0046] In some embodiments, step S1 includes:

[0047] S103: Acquire a current vehicle thermal management system detection signal and thermal management mode of the vehicle.

[0048] The vehicle thermal management system detection signal includes, for example, a no-fault signal and a fault signal. The fault signal includes, for example, a battery water pump fault signal, a motor water pump fault signal, a loop two-way valve fault signal, a loop three-way valve fault signal or a loop four-way valve fault signal, etc., without specific limitation; the thermal management mode includes a cockpit heating mode, a liquid filling mode, a battery temperature equalization mode or a cockpit passive cooling mode, etc., without specific limitation; obtaining the vehicle thermal management system detection signal and the thermal management mode provides a basis for obtaining the parameters required for waste heat utilization.

[0049] S104. When the vehicle thermal management system detection signal is a fault-free signal, the thermal management mode is not the liquid filling mode, the battery temperature equalization mode, and the cockpit passive cooling mode, and no battery active heating instruction is received, the current motor water outlet temperature of the vehicle, the minimum temperature of the battery cell, and the external ambient temperature are obtained.

[0050] When the vehicle thermal management system detection signal is a fault-free signal, it means that there is no fault in each component of the system, and the subsequent circuit opening operation can be performed.

[0051] When the thermal management mode is liquid filling mode, it means that the vehicle thermal management system is filling liquid. At this time, battery heating and heat pump heating operations cannot be performed; when the thermal management mode is battery temperature equalization mode, it means that the battery cells are in balanced temperature. At this time, battery heating operations cannot be performed, otherwise it will cause a logical conflict; when the thermal management mode is cockpit passive cooling mode, it means that the cockpit is lowering the temperature. At this time, heat pump operations cannot be performed, otherwise it will cause a logical conflict.

[0052] The battery active heating command can be triggered by vehicle personnel and transmitted to the thermal management control unit. When the battery active heating command is received, the vehicle thermal management system will use a water heater (PTC, Positive Temperature Coefficient) to heat the battery. At this time, there is no need to use the motor waste heat, and the motor waste heat is inefficient in raising the battery temperature.

[0053] When the vehicle thermal management system detection signal is a fault-free signal, the thermal management mode is not the liquid filling mode, battery temperature equalization mode and cockpit passive cooling mode, and no battery active heating command is received, the motor water outlet temperature, the battery cell minimum temperature and the external ambient temperature are obtained to provide a basis for the transfer and utilization of the motor's waste heat.

[0054] In some embodiments, step S2 includes:

[0055] S201: When the external ambient temperature is less than or equal to a first preset ambient temperature, and the motor water outlet temperature and the battery cell minimum temperature meet a preset battery heating condition, the battery heating circuit 2 is turned on.

[0056] The first preset ambient temperature is, for example, -20°C, which is not specifically limited. When the external ambient temperature is ≤-20°C, the air compressor does not work, and the motor waste heat cannot be used to increase the cockpit temperature. At this time, when the battery heating conditions are met, regardless of whether the heat pump heating request signal is received, the motor waste heat can only be used for battery heating, which has high energy utilization and reduces the energy consumption of the entire vehicle.

[0057] In some embodiments, the battery heating conditions include: the motor water outlet temperature is less than or equal to a first preset motor temperature, the battery cell minimum temperature is less than or equal to the first preset cell temperature, and the difference between the motor water outlet temperature and the battery cell minimum temperature is greater than the first preset difference temperature.

[0058] The first preset motor temperature is, for example, 45°C, the first preset battery cell temperature is, for example, 10°C, and the first preset difference temperature is, for example, 5°C, without specific limitation; when the motor water outlet temperature is too high, if the motor waste heat is used to heat the battery, the battery temperature will be too high, affecting work efficiency; when the battery cell minimum temperature is high, the battery itself is at a suitable operating temperature and does not need to be heated; when the difference between the motor water outlet temperature and the battery cell minimum temperature is too low, the motor waste heat cannot effectively increase the battery temperature, and the energy utilization rate is low.

[0059] In some embodiments, step S2 includes:

[0060] S202 : When the external ambient temperature is greater than the first preset ambient temperature and less than or equal to the second preset ambient temperature, and the heat pump heating request signal is received, the heat pump heating circuit 3 is turned on.

[0061] The second preset ambient temperature is, for example, -12°C, which is not specifically limited. When -20°C < external ambient temperature ≤ -12°C, vehicle users usually turn on the air conditioner at this temperature, that is, the thermal management control unit will receive the heat pump heating request signal. At this time, using the waste heat of the motor for heat pump heating can further increase the cockpit temperature and reduce the energy consumption of the entire vehicle. For the battery, a water-heating heater (PTC) can be used for heating, which is highly efficient.

[0062] In some embodiments, step S2 includes:

[0063] S203. When the external ambient temperature is greater than the second preset ambient temperature and less than or equal to the third preset ambient temperature, the motor water outlet temperature and the minimum temperature of the battery cell meet the battery heating conditions, and the heat pump heating request signal is received, the heat pump heating circuit 3 is turned on. After the preset heating time, the heat pump heating circuit 3 is turned off and the battery heating circuit 2 is turned on.

[0064] The third preset ambient temperature is, for example, 5°C, and the preset heating time is, for example, 30 minutes, with no specific limitation. When -12°C < external ambient temperature ≤ 5°C, if the battery heating conditions are met and a heat pump heating request signal is received, in order to prioritize user comfort, the heat pump heating circuit 3 needs to be turned on first to increase the cockpit temperature. After the preset heating time, the heat pump heating circuit 3 is turned off and the battery heating circuit 2 is turned on to heat the battery to improve the user experience.

[0065] In some embodiments, step S2 includes:

[0066] S204. When the external ambient temperature is greater than the second preset ambient temperature and less than or equal to the third preset ambient temperature, the motor water outlet temperature and the minimum temperature of the battery cell meet the battery heating conditions, and the heat pump heating request signal is not received, the battery heating circuit 2 is turned on.

[0067] When the ambient temperature is -12°C < 5°C and the battery heating conditions are met, if no heat pump heating request signal is received, the battery heating circuit 2 is turned on to heat the battery without considering the cockpit temperature to ensure battery operating efficiency.

[0068] In some embodiments, step S2 includes:

[0069] S205 : When the external ambient temperature is greater than the third preset ambient temperature, and the motor water outlet temperature and the battery cell minimum temperature meet the battery heating conditions, the battery heating circuit 2 is turned on.

[0070] When the outside ambient temperature is greater than 5°C, the temperature is relatively high. At this temperature, if the vehicle user turns on the air conditioner, the thermal management control unit will select the air heat source to heat the heat pump, that is, the heat pump will absorb the temperature of the outside environment to heat up the cockpit. The thermal efficiency is higher and there is no need to use the waste heat of the motor for heating. Therefore, regardless of whether the heat pump heating request signal is received, when the battery heating conditions are met, it is only necessary to turn on the battery heating circuit 2 to heat the battery, which has a high energy utilization rate.

[0071] In some embodiments, step S2 includes:

[0072] S206 : When the motor water outlet temperature and the battery cell minimum temperature do not meet the battery heating condition and the heat pump heating request signal is received, the heat pump heating circuit 3 is turned on.

[0073] When the battery heating conditions are not met, regardless of the external ambient temperature, as long as the heat pump heating request signal is received, the heat pump heating circuit 3 can be turned on to heat the cockpit and reduce the energy consumption of the entire vehicle.

[0074] In some embodiments, as Figure 2 As shown, the vehicle motor 1 is also connected to a heat storage circuit 4. The heat storage circuit 4, the heat pump heating circuit 3 and the battery heating circuit 2 are connected in parallel. By turning on the heat storage circuit 4, the motor's waste heat can be used to heat the motor's own water temperature, providing a basis for subsequent efficient heating of the battery.

[0075] In some embodiments, the vehicle thermal management system control method further includes:

[0076] S3. When the external environment temperature, the motor water outlet temperature, and the minimum temperature of the battery cell meet the preset heat storage preparation conditions, the current speed of the vehicle and the on / off status of the battery heating circuit 2 are obtained.

[0077] The heat storage preparation conditions, for example, include: the external ambient temperature is less than or equal to the first preset ambient temperature, the motor water outlet temperature is less than or equal to the first preset motor temperature, and the battery cell minimum temperature is less than or equal to the first preset cell temperature; or, the external ambient temperature is greater than the second preset ambient temperature, the motor water outlet temperature is less than or equal to the first preset motor temperature, and the battery cell minimum temperature is less than or equal to the first preset cell temperature; the heat storage preparation conditions can be understood as the preconditions of the battery heating conditions, and the heat storage operation is the operation of using the residual heat of the motor to heat the water temperature of the motor itself. After the water temperature is fully increased to a certain extent, the battery heating circuit 2 is turned on to heat the battery, so that the heat transfer effect is better, thereby allowing the battery to heat up quickly and efficiently; heat storage operation is not required for heat pump heating, because the heat pump has a good heat absorption effect and the residual heat of the motor can be efficiently utilized.

[0078] When the external ambient temperature, the motor water outlet temperature and the minimum temperature of the battery cell meet the preset heat storage preparation conditions, the vehicle speed and the on / off status of the battery heating circuit 2 are obtained to provide a basis for judging the start of the heat storage operation.

[0079] S4. When the vehicle speed, the on / off state of the battery heating circuit 2, the motor water outlet temperature, and the minimum temperature of the battery cell meet the preset heat storage start conditions, the heat storage circuit 4 is turned on.

[0080] When the vehicle speed, the on / off status of the battery heating circuit 2, the motor water outlet temperature, and the minimum battery cell temperature meet the thermal storage start conditions, the thermal storage circuit 4 is turned on to heat the motor's own water temperature, providing a basis for subsequent rapid and efficient battery heating.

[0081] In some embodiments, the heat storage start-up conditions include: the on / off state of the battery heating circuit 2 is closed, the vehicle speed is greater than a first preset speed, and the difference between the motor water outlet temperature and the lowest temperature of the battery cell is less than or equal to the first preset difference temperature.

[0082] The battery heating circuit 2 is in the closed state, indicating that the vehicle has not yet transferred and utilized the waste heat of the motor; the first preset speed is, for example, 15km / h, which is not specifically limited. When the vehicle speed is greater than 15km / h, it means that the vehicle is driving and the vehicle motor 1 has accumulated some waste heat; when the difference between the motor water outlet temperature and the lowest temperature of the battery cell is less than or equal to the first preset difference temperature, the battery heating condition is not met at this time, and the heat storage circuit 4 is turned on to increase the water temperature until the difference between the motor water outlet temperature and the lowest temperature of the battery cell is greater than the first preset difference temperature, and then the heat storage circuit 4 is closed and the battery heating circuit 2 is turned on, which can quickly and efficiently heat the battery and achieve high energy utilization.

[0083] In some embodiments, the heat storage start-up conditions include: the on / off state of the battery heating circuit 2 is on, the vehicle speed is greater than the first preset speed, and the difference between the motor water outlet temperature and the lowest temperature of the battery cell is less than or equal to a second preset difference temperature, wherein the second preset difference temperature is less than the first preset difference temperature.

[0084] The battery heating circuit 2 is in the on state, indicating that the vehicle has been performing battery heating operations for a period of time; the vehicle speed is greater than the first preset speed, indicating that the vehicle is driving and the vehicle motor 1 has accumulated some waste heat; the second preset difference temperature is, for example, 2°C, and is not specifically limited. When the difference between the motor water outlet temperature and the lowest temperature of the battery cell is ≤2°C, the battery heating condition is no longer met, but part of the motor waste heat has been transferred to the battery heating. In order to ensure that the battery is continuously and fully heated, the second preset difference temperature is set to be lower than the first preset difference temperature, and then the heat storage circuit 4 is opened to increase the water temperature until the difference between the motor water outlet temperature and the lowest temperature of the battery cell is greater than the first preset difference temperature. Then, the heat storage circuit 4 is closed and the battery heating circuit 2 is opened, which can fully and efficiently heat the battery and achieve high energy utilization.

[0085] In some embodiments, opening the heat storage circuit 4 includes: opening the heat storage circuit 4 after the vehicle speed is greater than a first preset speed and lasts for a first preset delay time.

[0086] The first preset delay time is, for example, 30 seconds, which is not specifically limited. Opening the heat storage circuit 4 after the first preset delay time can allow the motor to accumulate more waste heat, thereby ensuring efficient heat storage.

[0087] In some embodiments, the vehicle thermal management system control method further includes:

[0088] S5. When the motor water outlet temperature and / or the battery cell minimum temperature meet the preset waste heat recovery shutdown condition, close the battery heating circuit 2 and / or the heat pump heating circuit 3.

[0089] When the difference between the motor water outlet temperature and the minimum battery cell temperature or the motor water outlet temperature or the minimum battery cell temperature meets the waste heat recovery shutdown conditions, the battery heating circuit 2 and / or the heat pump heating circuit 3 are closed, and the heating of the battery and / or heat pump is stopped to ensure the safety and stability of the entire vehicle.

[0090] In some embodiments, the waste heat recovery shut-off condition includes: the motor water outlet temperature is greater than a second preset motor temperature, and the second preset motor temperature is greater than the first preset motor temperature.

[0091] The second preset motor temperature is, for example, 50°C, which is not specifically limited. When the motor outlet temperature is greater than 50°C, the vehicle motor 1 temperature is too high. To avoid safety problems, the battery heating circuit 2 and the heat pump heating circuit 3 need to be shut down. The second preset motor temperature is set to be greater than the first preset motor temperature to avoid parameter jumps during data collection, which affects the judgment of shutting down the waste heat recovery.

[0092] In some embodiments, the waste heat recovery shut-off condition includes: the lowest temperature of the battery cell is greater than a second preset cell temperature, and the second preset cell temperature is greater than the first preset cell temperature.

[0093] The second preset battery cell temperature is, for example, 15°C, which is not specifically limited. When the second preset battery cell temperature is greater than 15°C, the battery can work normally and the battery heating circuit 2 needs to be turned off to avoid excessive temperature. The second preset battery cell temperature is set to be greater than the first preset battery cell temperature to avoid parameter jumps during data collection, which affects the judgment of whether to shut down the waste heat recovery.

[0094] In some embodiments, the waste heat recovery shutdown condition includes: the difference between the motor water outlet temperature and the lowest temperature of the battery cell is less than or equal to the second preset difference temperature, and the vehicle speed is less than the second preset speed, wherein the second preset speed is less than the first preset speed.

[0095] When the difference between the motor water outlet temperature and the lowest temperature of the battery cell is less than or equal to the second preset difference temperature, the efficiency of the motor waste heat in heating the battery is very low; the second preset speed is, for example, 10km / h, but is not specifically limited. When the vehicle speed is less than 10km / h, the vehicle may be about to stop, and the accumulated waste heat of the motor is low, which is not enough to heat the battery, and the battery heating circuit 2 needs to be closed; the second preset speed is set to be lower than the first preset speed to avoid parameter jumps during data collection, which affects the judgment of closing the waste heat recovery.

[0096] In some embodiments, shutting down the battery heating circuit 2 and / or the heat pump heating circuit 3 includes shutting down the battery heating circuit 2 and / or the heat pump heating circuit 3 after the vehicle speed is less than a second preset speed and lasts for a second preset delay time.

[0097] The second preset delay time is, for example, 30 seconds, which is not specifically limited. After the second preset delay time, the accumulated waste heat of the motor is low, and waste heat recovery is turned off to ensure the safety and stability of the entire vehicle.

[0098] In some embodiments, after the battery heating circuit 2 or the heat pump heating circuit 3 is turned on, when the current vehicle mode of the vehicle is not the driving mode, the vehicle thermal management system detection signal is a fault signal, the thermal management mode is the liquid filling mode, the battery temperature equalization mode or the cockpit passive cooling mode, or when the battery active heating instruction is received, the battery heating circuit 2 or the heat pump heating circuit 3 is turned off.

[0099] In some embodiments of the present application, a vehicle thermal management system control device is provided, wherein the vehicle thermal management system includes a battery heating circuit 2 and a heat pump heating circuit 3 connected to a vehicle motor 1, Figure 3 The vehicle thermal management system control device includes: an acquisition module 31, configured to obtain the current motor water outlet temperature, the minimum battery cell temperature and the external ambient temperature of the vehicle; a waste heat recovery module 32, configured to make a judgment based on the motor water outlet temperature, the minimum battery cell temperature, the external ambient temperature and / or whether a heat pump heating request signal is received to start the battery heating circuit 2 or the heat pump heating circuit 3.

[0100] In some embodiments, the acquisition module 31 is further configured to acquire the current vehicle mode of the vehicle; when the vehicle mode is driving mode, the current motor water outlet temperature, the minimum temperature of the battery cell and the external ambient temperature of the vehicle are acquired.

[0101] In some embodiments, the acquisition module 31 is further configured to acquire the vehicle's current vehicle thermal management system detection signal and thermal management mode. When the vehicle thermal management system detection signal indicates a fault-free state, the thermal management mode is not liquid filling mode, battery temperature equalization mode, or cabin passive cooling mode, and no active battery heating command has been received, the acquisition module 31 acquires the vehicle's current motor water outlet temperature, the battery cell minimum temperature, and the ambient temperature.

[0102] In some embodiments, the waste heat recovery module 32 is further configured to, when the external ambient temperature is less than or equal to a first preset ambient temperature, and the motor water outlet temperature and the minimum temperature of the battery cell meet the preset battery heating condition, turn on the battery heating circuit 2; or, when the external ambient temperature is greater than the first preset ambient temperature and less than or equal to a second preset ambient temperature, and the heat pump heating request signal is received, turn on the heat pump heating circuit 3; or, when the external ambient temperature is greater than the second preset ambient temperature and less than or equal to a third preset ambient temperature, the motor water outlet temperature and the minimum temperature of the battery cell meet the battery heating condition, and the heat pump heating request signal is received, turn on the heat pump heating circuit 3, and after the preset heating time, close the heat pump heating circuit 3 and open the battery heating circuit 2; or, when the external ambient temperature is greater than the second preset ambient temperature and less than or equal to the third preset ambient temperature, the motor water outlet temperature and the minimum temperature of the battery cell meet the battery heating condition, and the heat pump heating request signal is not received, open the battery heating circuit 2; or, when the external ambient temperature is greater than the third preset ambient temperature and the motor water outlet temperature and the minimum temperature of the battery cell meet the battery heating condition, open the battery heating circuit 2; or, when the motor water outlet temperature and the minimum temperature of the battery cell do not meet the battery heating condition and the heat pump heating request signal is received, open the heat pump heating circuit 3.

[0103] In some embodiments, the vehicle motor 1 is also connected to a heat storage circuit 4, and the vehicle thermal management system control device also includes: a heat storage module, which is configured to obtain the current vehicle speed and the on / off status of the battery heating circuit 2 when the external ambient temperature, the motor water outlet temperature and the minimum temperature of the battery cell meet the preset heat storage preparation conditions; when the vehicle speed, the on / off status of the battery heating circuit 2, the motor water outlet temperature and the minimum temperature of the battery cell meet the preset heat storage start conditions, the heat storage circuit 4 is turned on.

[0104] In some embodiments, the vehicle thermal management system control device also includes: a recovery termination module, which is configured to close the battery heating circuit 2 and / or the heat pump heating circuit 3 when the motor water outlet temperature and / or the minimum temperature of the battery cell meet the preset waste heat recovery shutdown conditions.

[0105] The device of the above embodiment is used to implement the corresponding vehicle thermal management system control method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0106] In some embodiments of the present application, a vehicle is provided, comprising: a controller, wherein the controller is configured to execute the vehicle thermal management system control method as described in any of the above embodiments.

[0107] The vehicle can improve energy utilization and provide good user experience.

[0108] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments and methods, the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and runnable on the processor, wherein when the processor executes the program, the vehicle thermal management system control method described in any of the above embodiments is implemented.

[0109] Figure 4 10. A more specific hardware structure diagram of an electronic device provided in this embodiment is shown. The device may include: a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040 are communicatively connected to each other within the device via the bus 1050.

[0110] The processor 1010 can be implemented using a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0111] The memory 1020 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage devices, dynamic storage devices, etc. The memory 1020 can store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 1020 and is called and executed by the processor 1010.

[0112] The input / output interface 1030 is used to connect input / output modules to implement information input and output. The input / output modules can be configured as components within the device (not shown) or can be externally connected to the device to provide corresponding functions. Input devices can include a keyboard, mouse, touch screen, microphone, various sensors, etc., and output devices can include a display, speaker, vibrator, indicator light, etc.

[0113] The communication interface 1040 is used to connect to a communication module (not shown) to enable communication between the device and other devices. The communication module can communicate via wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WiFi, Bluetooth, etc.).

[0114] The bus 1050 comprises a path for transmitting information between the various components of the device (eg, the processor 1010 , the memory 1020 , the input / output interface 1030 , and the communication interface 1040 ).

[0115] It should be noted that although the above device only shows the processor 1010, the memory 1020, the input / output interface 1030, the communication interface 1040, and the bus 1050, in a specific implementation, the device may also include other components necessary for normal operation. In addition, it will be understood by those skilled in the art that the above device may only include the components necessary to implement the embodiments of this specification, and does not necessarily include all the components shown in the figure.

[0116] The electronic device of the above embodiment is used to implement the corresponding vehicle thermal management system control method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0117] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments and methods, the present application also provides a computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable the computer to execute the vehicle thermal management system control method described in any of the above embodiments.

[0118] The computer-readable media of this embodiment include permanent and non-permanent, removable and non-removable media that can be used to store information by any method or technology. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0119] The computer instructions stored in the storage medium of the above embodiment are used to enable the computer to execute the vehicle thermal management system control method described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0120] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. Within the scope of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0121] In addition, to simplify the description and discussion, and in order not to make the embodiment of the application difficult to understand, the device can be shown in the form of a block diagram, so as to avoid making the embodiment of the application difficult to understand, and this also takes into account the following fact, that is, the details of the embodiment of the embodiment of the application about these block diagram devices are highly dependent on the platform to be implemented (that is, these details should be fully within the scope of understanding of those skilled in the art). When specific details are set forth to describe the exemplary embodiments of the application, it is obvious to those skilled in the art that the embodiment of the application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0122] While the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0123] The embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of this application.

Claims

1. A vehicle thermal management system control method, characterized in that: The vehicle thermal management system includes a battery heating circuit, a heat storage circuit, and a heat pump heating circuit connected to a vehicle motor. The vehicle thermal management system control method includes: Get the vehicle's current motor water outlet temperature, battery cell minimum temperature, and external ambient temperature; a judgment is made based on the motor water outlet temperature, the minimum battery cell temperature, the external ambient temperature, and / or whether a heat pump heating request signal is received to activate the battery heating circuit or the heat pump heating circuit; when the external ambient temperature, the motor water outlet temperature, and the minimum battery cell temperature meet a preset heat storage preparation condition, obtaining the current vehicle speed and battery heating operation status; when the vehicle speed, the battery heating operation status, the motor water outlet temperature, and the minimum battery cell temperature meet a preset heat storage start condition, activating the heat storage circuit; The heat storage preparation condition includes: the external ambient temperature is less than or equal to a first preset ambient temperature, the motor water outlet temperature is less than or equal to the first preset motor temperature, and the lowest battery cell temperature is less than or equal to the first preset cell temperature; or, the external ambient temperature is greater than a second preset ambient temperature, the motor water outlet temperature is less than or equal to the first preset motor temperature, and the lowest battery cell temperature is less than or equal to the first preset cell temperature, wherein the first preset ambient temperature is less than the second preset ambient temperature. The thermal storage start-up condition includes: when the battery heating operation state is that the battery heating operation has not yet been performed, the vehicle speed is greater than a first preset speed, and the difference between the motor water outlet temperature and the lowest battery cell temperature is less than or equal to a first preset difference temperature; and when the battery heating operation state is that the battery heating operation has been performed, the vehicle speed is greater than the first preset speed, and the difference between the motor water outlet temperature and the lowest battery cell temperature is less than or equal to a second preset difference temperature, wherein the second preset difference temperature is lower than the first preset difference temperature.

2. The vehicle thermal management system control method according to claim 1, characterized in that: The method of obtaining the vehicle's current motor water outlet temperature, battery cell minimum temperature, and external ambient temperature includes: Obtain the current vehicle mode of the vehicle; When the vehicle mode is the driving mode, the current motor water outlet temperature, the minimum temperature of the battery cell and the external environment temperature of the vehicle are obtained.

3. The vehicle thermal management system control method according to claim 1, characterized in that: The method of obtaining the vehicle's current motor water outlet temperature, battery cell minimum temperature, and external ambient temperature includes: Obtaining a current vehicle thermal management system detection signal and thermal management mode of the vehicle; When the vehicle thermal management system detection signal is a fault-free signal, the thermal management mode is not the liquid filling mode, the battery temperature equalization mode, and the cockpit passive cooling mode, and no battery active heating instruction is received, the current motor water outlet temperature of the vehicle, the minimum temperature of the battery cell, and the external ambient temperature are obtained.

4. The vehicle thermal management system control method according to claim 1, characterized in that: The determining, based on the motor water outlet temperature, the battery cell minimum temperature, the external ambient temperature, and / or whether a heat pump heating request signal is received, to start the battery heating circuit or the heat pump heating circuit includes: When the external ambient temperature is less than or equal to a first preset ambient temperature, and the motor water outlet temperature and the battery cell minimum temperature meet a preset battery heating condition, the battery heating circuit is turned on; Alternatively, when the external ambient temperature is greater than the first preset ambient temperature and less than or equal to the second preset ambient temperature, and the heat pump heating request signal is received, the heat pump heating circuit is turned on; Alternatively, when the external ambient temperature is greater than the second preset ambient temperature and less than or equal to the third preset ambient temperature, the motor water outlet temperature and the battery cell minimum temperature meet the battery heating condition, and the heat pump heating request signal is received, the heat pump heating circuit is turned on, and after a preset heating time, the heat pump heating circuit is turned off and the battery heating circuit is turned on; Alternatively, when the external ambient temperature is greater than the second preset ambient temperature and less than or equal to the third preset ambient temperature, the motor water outlet temperature and the battery cell minimum temperature meet the battery heating condition, and the heat pump heating request signal is not received, the battery heating circuit is turned on; Alternatively, when the external ambient temperature is greater than the third preset ambient temperature, and the motor water outlet temperature and the battery cell minimum temperature meet the battery heating condition, the battery heating circuit is turned on; Alternatively, when the motor water outlet temperature and the battery cell minimum temperature do not meet the battery heating condition and the heat pump heating request signal is received, the heat pump heating circuit is turned on; Among them, the battery heating conditions include: the motor water outlet temperature is less than or equal to a first preset motor temperature, the battery cell minimum temperature is less than or equal to the first preset cell temperature, and the difference between the motor water outlet temperature and the battery cell minimum temperature is greater than the first preset difference temperature.

5. The vehicle thermal management system control method according to claim 1, characterized in that: Also includes: When the motor water outlet temperature and / or the battery cell minimum temperature meet the preset waste heat recovery shutdown conditions, the battery heating circuit and / or the heat pump heating circuit are closed.

6. The vehicle thermal management system control method according to claim 5, characterized in that: The waste heat recovery shutdown conditions include: The motor water outlet temperature is greater than a second preset motor temperature, and the second preset motor temperature is greater than the first preset motor temperature; Alternatively, the lowest battery cell temperature is greater than a second preset battery cell temperature, and the second preset battery cell temperature is greater than the first preset battery cell temperature; Alternatively, the difference between the motor water outlet temperature and the lowest temperature of the battery cell is less than or equal to the second preset temperature difference, and the vehicle speed is less than a second preset speed, wherein the second preset speed is less than the first preset speed.

7. A vehicle thermal management system control device, characterized in that: The vehicle thermal management system includes a battery heating circuit, a heat storage circuit, and a heat pump heating circuit connected to the vehicle motor. The vehicle thermal management system control device includes: An acquisition module is configured to obtain the current motor water outlet temperature, the minimum battery cell temperature, and the external ambient temperature of the vehicle; The waste heat recovery module is configured to make a judgment based on the motor water outlet temperature, the minimum temperature of the battery cell, the external ambient temperature and / or whether a heat pump heating request signal is received to start the battery heating circuit or the heat pump heating circuit; when the external ambient temperature, the motor water outlet temperature and the minimum temperature of the battery cell meet the preset heat storage preparation conditions, the current vehicle speed and battery heating operation status of the vehicle are obtained; when the vehicle speed, the battery heating operation status, the motor water outlet temperature and the minimum temperature of the battery cell meet the preset heat storage start conditions, the heat storage circuit is started; wherein, the heat storage preparation conditions include: the external ambient temperature is less than or equal to a first preset ambient temperature, the motor water outlet temperature is less than or equal to a first preset motor temperature, and the minimum temperature of the battery cell is less than or equal to a first preset cell temperature ; Or, the external ambient temperature is greater than the second preset ambient temperature, the motor water outlet temperature is less than or equal to the first preset motor temperature, and the battery cell minimum temperature is less than or equal to the first preset battery cell temperature, wherein the first preset ambient temperature is less than the second preset ambient temperature; the heat storage start-up condition includes: when the battery heating operation state is that the battery heating operation has not yet been performed, the vehicle speed is greater than the first preset speed, and the difference between the motor water outlet temperature and the battery cell minimum temperature is less than or equal to the first preset difference temperature; and, when the battery heating operation state is that the battery heating operation has been performed, the vehicle speed is greater than the first preset speed, and the difference between the motor water outlet temperature and the battery cell minimum temperature is less than or equal to the second preset difference temperature, wherein the second preset difference temperature is less than the first preset difference temperature.

8. A vehicle, characterized in that: include: A controller, wherein the controller is used to execute the vehicle thermal management system control method according to any one of claims 1 to 6.

Images