Automotive thermal management system and method

Abstract

The application provides an automobile thermal management system and method. The automobile thermal management system absorbs solar energy through a solar heater to store heat. When the passenger cabin has a heating demand, a first three-way proportional valve is used to adjust the flow through the solar heater, and the liquid medium heated in the solar heater is transferred to a water-water plate heat exchanger to exchange heat with the liquid medium in the cooler circuit, thereby heating the passenger cabin. When the battery pack has a heating demand, a four-way valve is used to switch the water circuit, and the heated liquid medium flows through the battery pack to heat the battery pack. In this way, the clean energy of solar energy is used to heat the battery and / or the passenger cabin, thereby effectively reducing the power consumption of the water heater and improving the endurance of the automobile.

Description

Technical Field

[0001] This application relates to the field of automotive thermal management technology, and more specifically, to an automotive thermal management system and method. Background Technology

[0002] Currently, both air conditioning and battery heating in pure electric vehicles consume high-voltage electricity, using air heaters or water heaters to generate heat, or using compressors to compress refrigerant to achieve heating. Therefore, in winter, starting the car requires a significant amount of high-voltage electricity to heat the passenger compartment and battery, resulting in high energy consumption and a shorter driving range. Summary of the Invention

[0003] The purpose of this application is to provide an automotive thermal management system and method, which aims to solve the problem in the related technology that automobiles need to consume high-voltage electricity to heat the passenger compartment and battery, resulting in high energy consumption and a shortened driving range.

[0004] In a first aspect, this application provides an automotive thermal management system, comprising: a solar heater, a water heater, a first three-way proportional valve, a four-way valve, a heater pump, a battery water pump, a heat exchanger pump, a water-to-water heat exchanger, a battery pack, and an air conditioning system; wherein: the water heater and the heater pump are sequentially connected between the outlet of the solar heater and the first inlet of the four-way valve; the water-to-water heat exchanger and the first three-way proportional valve are sequentially connected between the second outlet of the four-way valve and the inlet of the solar heater; the battery water pump and the battery pack are sequentially connected between the first outlet and the second inlet of the four-way valve; the solar heater, water heater, heater pump, four-way valve, and water-to-water heat exchanger form a solar heating return system. The circuit consists of a water heater, a warm air pump, a four-way valve, and a water-to-water heat exchanger forming a water heating circuit; a hot water pump and a cooler for the air conditioning system forming a cooler circuit; a first three-way proportional valve includes a first flow channel, a second flow channel, and a third flow channel. The first flow channel is connected to the outlet of the water-to-water heat exchanger, the second flow channel is connected to the inlet of the water heater, and the third flow channel is connected to the inlet of the solar heater; the first three-way proportional valve is used to control the switching of the heating circuit flowing through the water-to-water heat exchanger between the solar heating circuit and the water heating circuit; the water-to-water heat exchanger internally connects the heating circuit and the cooler circuit respectively, and is used to control the heat exchange between the liquid medium in the heating circuit and the liquid medium in the cooler circuit.

[0005] In the above implementation process, an automotive thermal management system is provided. This system uses a solar heater to absorb and store solar energy. When the passenger compartment requires heating, a first three-way proportional valve regulates the flow rate through the solar heater, transferring the heated liquid medium inside to a water-to-water heat exchanger. There, the liquid medium exchanges heat with the liquid medium in the cooler circuit, thus heating the passenger compartment. When the battery pack requires heating, a four-way valve switches the water circuit, allowing the heated liquid medium to flow through the battery pack, thus heating the battery pack. In this way, solar energy, a clean energy source, is used to heat the battery and / or the passenger compartment, effectively reducing the power consumption of the water heater and thereby improving the vehicle's range.

[0006] Furthermore, in some examples, it also includes: an electronic control unit; the electronic control unit is used to control the connection between the first inlet and the first outlet of the four-way valve, and the connection between the second inlet and the second outlet, and drive the warm air pump to work when the battery pack has a heating or cooling requirement; to control the connection between the first inlet and the second outlet of the four-way valve, and the connection between the second inlet and the first outlet, and drive the battery water pump to work when the battery pack has a temperature equalization requirement; and to control the connection between the first inlet and the second outlet of the four-way valve, and the connection between the second inlet and the first outlet, when the battery pack does not have a thermal management requirement.

[0007] In the above implementation process, when the battery pack requires heating or cooling, the electronic control unit controls the flow of the heating circuit through the battery pack via a four-way valve and drives the liquid medium to flow through the warm air pump, so that the liquid medium in the heating circuit exchanges heat with the battery pack to achieve heating or cooling of the battery pack; when the battery pack requires temperature equalization, the electronic control unit controls the heating circuit to not flow through the battery pack via the four-way valve, and at the same time drives the battery water pump to work to reduce the temperature difference of the battery pack; when the battery pack does not require thermal management, the electronic control unit controls the heating circuit to not flow through the battery pack via the four-way valve, and at this time there is no need to drive the battery water pump, thereby maintaining the temperature of the battery pack within a suitable temperature range.

[0008] Furthermore, in some examples, it also includes: a solar water temperature sensor; the solar water temperature sensor is used to detect the water temperature inside the solar heater and report it to the electronic control unit; the electronic control unit is also used to control the first three-way proportional valve to switch the heating circuit flowing through the water heat exchanger to the solar heating circuit when the water temperature detected by the solar water temperature sensor is greater than the first preset water temperature, and to control the first three-way proportional valve to switch the heating circuit flowing through the water heat exchanger to the water heating circuit when the water temperature detected by the solar water temperature sensor is less than the second preset water temperature; the first preset water temperature is greater than or equal to the second preset water temperature.

[0009] In the above implementation process, a solar water temperature sensor is added to the system so that the electronic control unit can monitor the heat storage status of the solar heater. When the solar heater has sufficient heat storage, the electronic control unit opens the solar heating circuit. When the solar heater has insufficient heat, the electronic control unit closes the solar heating circuit. In this way, intermittent use of solar hot water for heating is achieved, thereby effectively reducing the power consumption of the vehicle's water heater.

[0010] Furthermore, in some examples, it also includes: a battery inlet water temperature sensor; the battery inlet water temperature sensor is used to detect the water temperature at the battery pack inlet and report it to the electronic control unit; the electronic control unit is also used to control the water heater to turn off if the water temperature detected by the battery inlet water temperature sensor is greater than a third preset water temperature after controlling the first three-way proportional valve to switch the heating circuit flowing through the water heat exchanger to the solar heating circuit, and to control the water heater to turn on if the water temperature detected by the battery inlet water temperature sensor is less than a fourth preset water temperature; the third preset water temperature is greater than or equal to the fourth preset water temperature.

[0011] In the above implementation process, a battery inlet water temperature sensor is added to the system. After the solar heating circuit is turned on, the electronic control unit can determine whether the internal water temperature of the solar heater is sufficient to support the battery heating requirements based on the battery inlet water temperature. If the determination result is negative, the water heater is turned on to provide supplementary heating, thereby achieving the purpose of using solar energy to assist in heating the battery.

[0012] Furthermore, in some examples, it also includes: a battery outlet water temperature sensor; the battery outlet water temperature sensor is used to detect the water temperature at the battery pack outlet and report it to the electronic control unit; the electronic control unit is also used to adjust the flow rate of the liquid medium flowing through the battery pack by means of the warm air pump and / or the battery water pump based on the water temperatures detected by the battery inlet water temperature sensor and the battery outlet water temperature sensor respectively.

[0013] In the above implementation process, a battery outlet water temperature sensor is added to the system. The electronic control unit can determine the temperature difference of the battery pack based on the battery inlet water temperature and the battery outlet water temperature, and adjust the flow rate of the liquid medium flowing through the battery pack accordingly, thereby reducing the temperature difference of the battery pack.

[0014] Furthermore, in some examples, it also includes: a cooling inlet water temperature sensor and a second three-way proportional valve; the cooling inlet water temperature sensor is used to detect the water temperature at the inlet of the cooler and report it to the electronic control unit; the second three-way proportional valve is installed on the cooler circuit and is used to control the flow rate of the water in the cooler circuit to the heat exchanger; the electronic control unit is also used to calculate the target water temperature at the cooler inlet based on the passenger cabin heat load, and when the target water temperature at the cooler inlet is greater than the water temperature detected by the cooling inlet water temperature sensor, the flow rate of the water in the cooler circuit to the heat exchanger is increased through the second three-way proportional valve, and when the target water temperature at the cooler inlet is less than the water temperature detected by the cooling inlet water temperature sensor, the flow rate of the water in the cooler circuit to the heat exchanger is decreased through the second three-way proportional valve.

[0015] In the above implementation process, a cooling inlet water temperature sensor and a second three-way proportional valve are added to the system. The electronic control unit calculates the target water temperature at the cooler inlet and controls the opening of the second three-way proportional valve based on the water temperature detected by the sensor. In this way, the heat obtained by the cooler can meet the heating needs of the passenger cabin.

[0016] Furthermore, in some examples, it also includes: a heat exchanger inlet water temperature sensor; the heat exchanger inlet water temperature sensor is used to detect the water temperature at the inlet of the water-to-water heat exchanger and report it to the electronic control unit; the electronic control unit is also used to determine the target water temperature at the inlet of the water-to-water heat exchanger based on the target water temperature at the inlet of the cooler and the current flow rate of the cooler circuit, and when the battery pack has a temperature equalization requirement or no thermal management requirement, it controls the outlet water temperature of the water heater based on the difference between the target water temperature at the inlet of the water-to-water heat exchanger and the water temperature detected by the heat exchanger inlet water temperature sensor.

[0017] In the above implementation process, a heat exchange inlet water temperature sensor is added to the system. The electronic control unit compares the target water temperature and the actual water temperature at the water exchange inlet of the water plate with the target water temperature and the actual water temperature at the water plate inlet. When heating a separate passenger cabin, the water heater outlet temperature is controlled based on the difference between the two, thereby reasonably meeting the heating needs of the passenger cabin and reducing the energy consumption of the water heater to a certain extent.

[0018] Secondly, this application provides an automotive thermal management method, applied to an electronic control unit in an automotive thermal management system as described in any of the first aspects; the method includes: when the outside temperature is lower than a target outside temperature and the battery pack temperature is lower than a first battery temperature, controlling a first three-way proportional valve to switch the heating circuit flowing through the water heat exchanger to a water heating circuit, controlling the first inlet of a four-way valve to connect with the first outlet, and the second inlet and the second outlet to connect, and driving the water heater and the heater pump to work; when the battery pack temperature rises to the second battery temperature, controlling the water heater to stop working, and controlling the first three-way proportional valve to switch the heating circuit flowing through the water heat exchanger to a solar heating circuit.

[0019] In the above process, when the vehicle is in a low-temperature environment and the battery needs to be heated, the electronic control unit first uses a water heater to quickly heat the battery pack until the temperature of the battery pack rises to the second battery temperature. Then, the solar heating circuit is turned on, and the heat stored inside the solar heater is used to heat the battery in the final stage. This effectively reduces energy consumption while meeting the battery heating requirements in a low-temperature environment.

[0020] Thirdly, this application provides an electronic device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the steps of the method described in any of the first aspects.

[0021] Fourthly, this application provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the method described in any of the first aspects.

[0022] Fifthly, this application provides a computer program product that, when run on a computer, causes the computer to perform the method described in any of the first aspects.

[0023] Other features and advantages disclosed in this application will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the above-described technology disclosed in this application.

[0024] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of an automotive thermal management system provided in an embodiment of this application;

[0027] Figure 2 A flowchart illustrating an automotive thermal management method provided in this application embodiment;

[0028] Figure 3AA schematic diagram of the structure of a thermal management system for a pure electric vehicle that uses a solar thermal storage device to intermittently assist in heating the passenger cabin and battery, provided for an embodiment of this application;

[0029] Figure 3B A schematic diagram of the water circulation path when the thermal management system for a pure electric vehicle provided in this application implements solar-assisted heating of the battery;

[0030] Figure 3C A schematic diagram of the water circulation path when the thermal management system for a pure electric vehicle provided in this application implements solar-assisted heating of the passenger compartment;

[0031] Figure 3D A schematic diagram of the water circulation path when the thermal management system for a pure electric vehicle provided in this application implements solar-assisted heating of the battery and passenger compartment;

[0032] Figure 3E A schematic diagram of another thermal management system for a pure electric vehicle provided in an embodiment of this application;

[0033] Figure 4 A block diagram of an automotive thermal management device provided in an embodiment of this application;

[0034] Figure 5 This is a structural block diagram of an electronic device provided in an embodiment of this application.

[0035] Among them: 11-Solar heater; 12-Water heater; 13-First three-way proportional valve; 14-Four-way valve; 15-Heat air pump; 16-Battery water pump; 17-Hot water exchange pump; 18-Water plate heat exchanger; 19-Battery pack; 20-Air conditioning system; 21-Cooler; 22-Evaporator; 23-Compressor; 24-Indoor condenser; 25-First electronic expansion valve; 26-Second electronic expansion valve; 27-First solenoid valve (normally closed); 28-Second solenoid valve (normally open); 29-Outdoor condenser; 30-Second three-way proportional valve; 31-Solar water temperature sensor; 32-Battery inlet water temperature sensor; 33-Battery outlet water temperature sensor; 34-Heat exchange inlet water temperature sensor; 35-Cooler inlet water temperature sensor; 36-Electric sunshade. Detailed Implementation

[0036] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0037] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] As described in the background section, related technologies suffer from the problem that automobiles require high-voltage electricity to heat the passenger compartment and battery, resulting in high energy consumption and a shortened driving range. Therefore, this application provides an automotive thermal management solution to address the aforementioned issues.

[0039] The embodiments of this application will be described below:

[0040] like Figure 1 As shown, Figure 1 This is a schematic diagram of an automotive thermal management system provided in an embodiment of this application. The automotive thermal management system includes a solar heater 11, a water heater 12, a first three-way proportional valve 13, a four-way valve 14, a heater pump 15, a battery water pump 16, a hot water pump 17, a water exchanger 18, a battery pack 19, and an air conditioning system 20; wherein: the water heater 12 and the heater pump 15 are sequentially connected between the outlet of the solar heater 11 and the first inlet of the four-way valve 14; the water exchanger 18 and the first three-way proportional valve 13 are sequentially connected between the second outlet of the four-way valve 14 and the inlet of the solar heater 11; the battery water pump 16 and the battery pack 19 are sequentially connected between the first outlet and the second inlet of the four-way valve 14; the solar heater 11, water heater 12, heater pump 15, four-way valve 14, and water exchanger 18 form a solar-powered air conditioning system. A solar heating circuit is formed by a water heater 12, a warm air pump 15, a four-way valve 14, and a water heat exchanger 18; a hot water pump 17 and a cooler 21 of the air conditioning system 20 form a cooler circuit; a first three-way proportional valve 13 includes a first flow channel, a second flow channel, and a third flow channel. The first flow channel is connected to the outlet of the water heat exchanger 18, the second flow channel is connected to the inlet of the water heater 12, and the third flow channel is connected to the inlet of the solar heater 11; the first three-way proportional valve 13 is used to control the switching of the heating circuit flowing through the water heat exchanger 17 between the solar heating circuit and the water heating circuit; the water heat exchanger 18 is internally connected to both the heating circuit and the cooler circuit, and is used to control the heat exchange between the liquid medium in the heating circuit and the liquid medium in the cooler circuit.

[0041] In the automotive thermal management system provided in this embodiment, a solar heater uses solar energy to heat a liquid medium for continuous heat storage. When there is a heating demand, a four-way valve switches the water circuit, and a water-to-water heat exchanger is used to achieve heat exchange between the circuits. This allows the heat obtained from solar energy conversion to heat the battery and / or passenger compartment, thereby effectively reducing the power consumption of the water heater and improving the vehicle's range.

[0042] Specifically, in this automotive thermal management system, a solar heater is used to heat a liquid medium using solar energy. This liquid medium can be pure water, or a mixture of pure water and alcohol, etc. The solar heater has a certain internal volume and heat storage capacity. It absorbs solar energy through collector tubes, converts the solar energy into heat energy, and then heats the internal liquid medium. A water heater is used to heat the liquid medium using the high-voltage electricity from the vehicle's power battery. This water heater can be a PTC (Positive Temperature Coefficient) water heater, i.e., a heater that uses a PTC thermistor element as the heat source. In this embodiment, the solar heating circuit is a heating circuit involving a solar heater. The energy for heating the liquid medium in this circuit can come solely from solar energy, or simultaneously from solar energy and the power battery's electrical energy. The water heating circuit, on the other hand, is a heating circuit without a solar heater. The energy for heating the liquid medium in this circuit can come solely from the power battery's electrical energy. These two heating circuits are controlled by a first three-way proportional valve, which includes a first flow channel, a second flow channel, and a third flow channel. The first flow channel is connected to the outlet of the water heat exchanger, the second flow channel is connected to the inlet of the water heater, and the third flow channel is connected to the inlet of the solar heater. When the first and third flow channels are connected, it is equivalent to opening the solar heating circuit, and the heating circuit connected to the water heat exchanger is the solar heating circuit. When the first and second flow channels are connected, it is equivalent to closing the solar heating circuit, and the heating circuit connected to the water heat exchanger is the water heating circuit.

[0043] In this automotive thermal management system, a heater pump is connected to both the outlet of the water heater and the first inlet of a four-way valve, driving the flow of the liquid medium in the heating circuit. The four-way valve is a control valve with four ports. In this embodiment, the four-way valve switches the water circuit. When the first inlet is connected to the first outlet, and the second inlet and second outlet are also connected, the liquid medium in the heating circuit flows through the battery pack to the water exchanger. When the first inlet is connected to the second outlet, and the second inlet is connected to the first outlet, the liquid medium in the heating circuit does not flow through the battery pack. Thus, when the battery requires heating, the heat provided by the solar heater and / or water heater can be transferred to the battery pack through the heater pump and the switching of the water circuit by the four-way valve, thereby heating the battery pack.

[0044] The full name of a water-to-water plate heat exchanger is a plate heat exchanger that uses high-temperature water to heat low-temperature water. It consists of a series of corrugated metal plates stacked together, forming rectangular channels between the plates for heat exchange. In this embodiment, the water-to-water plate heat exchanger internally connects the heating circuit and the cooling circuit. The liquid media in both circuits exchange heat at the water-to-water plate heat exchanger, thus achieving heat exchange between the two circuits. Therefore, when the passenger compartment requires heating, the heat provided by the solar heater and / or water heater is transferred to the water-to-water plate heat exchanger by the warm air pump. Then, driven by the hot water pump, the cooler exchanges heat from the water-to-water plate heat exchanger. At this time, the air conditioning system compressor controls the refrigerant to release heat from the internal condenser and absorb heat from the evaporator and cooler, thereby heating the passenger compartment. In this way, when there is sufficient sunshine, solar energy, a clean energy source, can be used to heat the passenger compartment, thereby reducing energy consumption and improving the vehicle's range.

[0045] The automotive thermal management system of this application may also have the following further improvements:

[0046] In some embodiments, the vehicle thermal management system may further include an electronic control unit; the electronic control unit is configured to control the first inlet and the first outlet of the four-way valve to be connected, and the second inlet and the second outlet to be connected, and drive the heater pump to operate when the battery pack has a heating or cooling requirement; control the first inlet and the second outlet of the four-way valve to be connected, and the second inlet and the first outlet to be connected, and drive the battery water pump to operate when the battery pack has a temperature equalization requirement; and control the first inlet and the second outlet of the four-way valve to be connected, and the second inlet and the first outlet to be connected, when the battery pack does not have a thermal management requirement.

[0047] An Electronic Control Unit (ECU) is a microprocessor or microcontroller that receives various information from sensors, processes and analyzes it, and then sends control pulses to various actuators. In this embodiment, the ECU can control various valve units and water pumps. When the battery pack temperature is below the lower limit or above the upper limit, it indicates that the battery pack needs heating or cooling. The ECU then controls the heating circuit to flow through the battery pack via a four-way valve and drives the liquid medium to flow through the warm air pump, so that the liquid medium in the heating circuit exchanges heat with the battery pack, thereby heating or cooling the battery pack. When the temperature difference of the battery pack is greater than a preset temperature difference, it indicates that the battery pack needs temperature equalization. The ECU then controls the heating circuit to not flow through the battery pack via a four-way valve and simultaneously drives the battery water pump to work. At this time, the battery pack and the battery water pump form a loop, and the liquid medium in this loop circulates, thereby reducing the temperature difference of the battery pack and achieving battery temperature equalization. When the battery pack does not require thermal management, the electronic control unit controls the heating circuit to not flow through the battery pack via a four-way valve. At this time, there is no need to drive the battery water pump, thereby maintaining the battery pack temperature within a suitable range.

[0048] In some embodiments, the vehicle thermal management system may further include a solar water temperature sensor; the solar water temperature sensor is used to detect the water temperature inside the solar heater and report it to the electronic control unit; the electronic control unit is also used to control a first three-way proportional valve to switch the heating circuit flowing through the water heat exchanger to the solar heating circuit when the water temperature detected by the solar water temperature sensor is greater than a first preset water temperature, and to control the first three-way proportional valve to switch the heating circuit flowing through the water heat exchanger to the water heating circuit when the water temperature detected by the solar water temperature sensor is less than a second preset water temperature; the first preset water temperature is greater than or equal to the second preset water temperature.

[0049] The solar water temperature sensor here can be a temperature sensor installed inside the solar heater near the outlet. This sensor detects the internal water temperature of the solar heater and feeds it back to the electronic control unit (ECU). The ECU controls the switching of the heating circuit based on the heat storage status of the solar heater. Specifically, when the internal water temperature of the solar heater is higher than a first preset temperature, it indicates that the solar heater has sufficient heat storage. The ECU then opens the solar heating circuit through a first three-way proportional valve, allowing the hot water inside the solar heater to participate in heat exchange with the battery and / or passenger compartment. When the internal water temperature of the solar heater is lower than a second preset temperature, it indicates that the solar heater has exhausted its heat. The ECU then closes the solar heating circuit through the first three-way proportional valve. This achieves intermittent use of solar hot water for heating, effectively reducing the power consumption of the vehicle's water heater. The first and second preset water temperatures can be set according to specific needs, and this application does not impose any restrictions on this.

[0050] Furthermore, in some embodiments, the vehicle thermal management system may further include a battery inlet water temperature sensor; the battery inlet water temperature sensor is used to detect the water temperature at the battery pack inlet and report it to the electronic control unit; the electronic control unit is also used to control the water heater to turn off if the water temperature detected by the battery inlet water temperature sensor is greater than a third preset water temperature after controlling the first three-way proportional valve to switch the heating circuit flowing through the water heat exchanger to the solar heating circuit, and to control the water heater to turn on if the water temperature detected by the battery inlet water temperature sensor is less than a fourth preset water temperature; the third preset water temperature is greater than or equal to the fourth preset water temperature.

[0051] The battery inlet water temperature sensor here can be a temperature sensor installed at the outlet of the battery water pump. This sensor detects the battery inlet water temperature and feeds it back to the electronic control unit. After the solar heating circuit is turned on, if the battery inlet water temperature is higher than the third preset water temperature, it indicates that the water temperature inside the solar heater is sufficient to support battery heating. At this time, the electronic control unit controls the water heater to turn off. If the battery inlet water temperature is lower than the third preset water temperature, it indicates that the water temperature inside the solar heater is insufficient to maintain the battery heating requirements. At this time, the electronic control unit controls the water heater to turn on to supplement the heat. In this way, the purpose of using solar energy to assist in heating the battery is achieved, reducing the overall vehicle energy consumption. Similarly, the third and fourth preset water temperatures can be set according to the needs of specific scenarios, and this application does not impose any restrictions on this.

[0052] Furthermore, in some embodiments, the vehicle thermal management system may also include a battery outlet water temperature sensor; the battery outlet water temperature sensor is used to detect the water temperature at the battery pack outlet and report it to the electronic control unit; the electronic control unit is also used to adjust the flow rate of the liquid medium flowing through the battery pack via the heater pump and / or the battery water pump based on the water temperatures detected by the battery inlet water temperature sensor and the battery outlet water temperature sensor respectively.

[0053] The battery outlet water temperature sensor here can be a temperature sensor installed at the outlet of the battery pack. This sensor detects the battery outlet water temperature and feeds it back to the electronic control unit (ECU). The ECU can then determine the temperature difference within the battery pack based on the battery inlet and outlet water temperatures. When the difference between the battery inlet and outlet water temperatures exceeds a preset value, it indicates a large temperature difference within the battery pack. The ECU can then increase the duty cycle and / or speed of the heater pump and / or battery pump, thereby increasing the flow rate of the liquid medium through the battery pack. This reduces the temperature difference within the battery pack and prevents performance degradation.

[0054] In some embodiments, the vehicle thermal management system may also include a cooling inlet water temperature sensor and a second three-way proportional valve. The cooling inlet water temperature sensor is used to detect the water temperature at the inlet of the cooler and report it to the electronic control unit. The second three-way proportional valve is installed on the cooler circuit and is used to control the flow rate of the water entering the cooler circuit via the heat exchanger. The electronic control unit is also used to calculate the target water temperature at the cooler inlet based on the heat load of the passenger compartment. When the target water temperature at the cooler inlet is greater than the water temperature detected by the cooling inlet water temperature sensor, the flow rate of the water entering the cooler circuit via the second three-way proportional valve is increased. When the target water temperature at the cooler inlet is less than the water temperature detected by the cooling inlet water temperature sensor, the flow rate of the water entering the cooler circuit via the second three-way proportional valve is decreased.

[0055] The cooling inlet water temperature sensor here can be a temperature sensor installed at the inlet of the cooler. This sensor detects the inlet water temperature and feeds it back to the electronic control unit. The second three-way proportional valve is installed in the cooler circuit. This valve can include a fourth, fifth, and sixth flow channel. The opening of the fourth and sixth flow channels is defined as 100%, and the opening of the fourth and fifth flow channels is defined as 0%. Any ratio can be linearly adjusted in between. Assuming the second three-way proportional valve opening is 0%, the flow rate of the water inlet heat exchanger in the cooler circuit is 0. The electronic control unit (ECU) can calculate the target cooler inlet water temperature based on the passenger cabin heat load. When the target cooler inlet water temperature is higher than the actual cooler inlet water temperature, it indicates that the heat obtained by the cooler is insufficient to meet the heating needs of the passenger cabin. In this case, the ECU increases the opening of the second three-way proportional valve to increase the flow rate of the water inlet heat exchanger in the cooler circuit, thereby raising the cooler inlet water temperature. Conversely, when the target cooler inlet water temperature is lower than the actual cooler inlet water temperature, the ECU decreases the opening of the second three-way proportional valve to decrease the flow rate of the water inlet heat exchanger in the cooler circuit, thereby lowering the cooler inlet water temperature. This ensures that the heating needs of the passenger cabin are adequately met.

[0056] Furthermore, in some embodiments, the vehicle thermal management system may also include a heat exchange inlet water temperature sensor; the heat exchange inlet water temperature sensor is used to detect the water temperature at the inlet of the water exchanger and report it to the electronic control unit; the electronic control unit is also used to determine the target water temperature at the water exchanger inlet based on the target water temperature at the cooler inlet and the current flow rate of the cooler circuit, and when the battery pack has a temperature equalization requirement or no thermal management requirement, the water heater outlet temperature is controlled based on the difference between the target water temperature at the water exchanger inlet and the water temperature detected by the heat exchange inlet water temperature sensor.

[0057] The heat exchanger inlet water temperature sensor here can be a temperature sensor installed at the inlet of the heat exchanger. This sensor detects the inlet water temperature of the heat exchanger and feeds it back to the electronic control unit (ECU). In some scenarios, this heat exchanger inlet water temperature sensor can also function as the battery outlet water temperature sensor. The ECU determines the target inlet water temperature of the heat exchanger based on the target inlet water temperature of the cooler and the current flow rate of the cooler circuit. For example, the ECU can consult a calibration table based on the current flow rate of the cooler circuit and the outside temperature to obtain a target correction value. This target correction value can be considered as compensation for heat loss during the process of heat transfer from the heat exchanger inlet to the cooler inlet. This calibration table can be obtained through actual vehicle calibration or environmental chamber calibration tests. Therefore, the electronic control unit adds the target water temperature at the cooler inlet to the target correction value to obtain the target water temperature at the water exchanger inlet. Then, the electronic control unit compares the target water temperature at the water exchanger inlet with the actual water temperature. When heating a separate passenger compartment, the electronic control unit controls the water heater's outlet temperature based on the difference between the two. For example, if the target water temperature at the water exchanger inlet is higher than the actual water temperature, the electronic control unit controls the water heater to increase the outlet temperature; if the target water temperature is lower than the actual water temperature, the electronic control unit controls the water heater to decrease the outlet temperature. This effectively meets the heating needs of the passenger compartment while reducing the energy consumption of the water heater to some extent.

[0058] In addition to the improvements mentioned above, the automotive thermal management system of this application can also be equipped with other components according to the needs of different scenarios, such as a water tank for replenishing the liquid medium to the heating circuit, an electric sunshade for controlling the area of ​​sunlight irradiating the solar heater, etc.

[0059] This application provides an automotive thermal management system that uses a solar heater to absorb and store solar energy. When the passenger compartment requires heating, a first three-way proportional valve regulates the flow rate through the solar heater, transferring the heated liquid medium inside to a water-to-water heat exchanger. There, the heated liquid exchanges heat with the liquid medium in the cooler circuit, thus heating the passenger compartment. When the battery pack requires heating, a four-way valve switches the water circuit, allowing the heated liquid medium to flow through the battery pack, thus heating the battery pack. In this way, solar energy, a clean energy source, is used to heat the battery and / or the passenger compartment, effectively reducing the power consumption of the water heater and thereby improving the vehicle's range.

[0060] like Figure 2 As shown, Figure 2 This is a flowchart of an automotive thermal management method provided in an embodiment of this application. The method is applied to the electronic control unit in the automotive thermal management system described in any of the preceding system embodiments; the method includes:

[0061] Step 201: When the outside temperature of the vehicle is lower than the target outside temperature of the vehicle and the temperature of the battery pack is lower than the temperature of the first battery, control the first three-way proportional valve to switch the heating circuit flowing through the water heat exchanger to the water heating circuit, control the first water inlet of the four-way valve to connect with the first water outlet, and connect the second water inlet and the second water outlet, and drive the water heater and the warm air pump to work.

[0062] Step 202: When the temperature of the battery pack rises to the temperature of the second battery, control the water heater to stop working and control the first three-way proportional valve to switch the heating circuit flowing through the water heat exchanger to the solar heating circuit.

[0063] In this embodiment, when the vehicle is turned off and parked in sunlight or driving in sunlight, the solar heater acts as a heat source to continuously heat the liquid medium. When the outside temperature is lower than the target outside temperature and the battery pack temperature is lower than the first battery temperature, it indicates that the vehicle is in a low-temperature environment and the battery needs heating. In this case, the electronic control unit shuts off the solar heating circuit and first uses the water heater to quickly heat the battery pack until the battery pack temperature rises to the second battery temperature. Then, the electronic control unit turns on the solar heating circuit and uses the heat stored inside the solar heater to heat the battery in the final stage. This effectively reduces energy consumption while meeting the battery heating needs in low-temperature environments.

[0064] The target outside temperature, first battery temperature, and second battery temperature mentioned above can be set according to the needs of specific scenarios. Furthermore, other improvements in the aforementioned system embodiments are also applicable to the method embodiments, and will not be elaborated upon here.

[0065] To provide a more detailed explanation of the solution in this application, a specific embodiment is described below:

[0066] This embodiment provides a thermal management system for a pure electric vehicle that uses a solar thermal storage device to intermittently assist in heating the passenger cabin and battery. The structure of the system is as follows: Figure 3A As shown, the system includes Figure 1The diagram shows a solar heater 11, a water heater (abbreviated as WPTC) 12, a first three-way proportional valve 13, a four-way valve 14, a warm air water pump 15, a battery-powered water pump 16, a hot water exchanger pump 17, a water exchange plate 18, a battery pack 19, and an air conditioning system 20 (only some components are shown in the diagram). The air conditioning system 20 includes a cooler 21, an evaporator 22, a compressor 23, an indoor condenser 24, a first electronic expansion valve 25, a second electronic expansion valve 26, a first solenoid valve (normally closed) 27, a second solenoid valve (normally open) 28, and an outdoor condenser 29. In addition, the hot water pump 17 and the water plate heat exchanger 18 are equipped with a second three-way proportional valve 30. A solar water temperature sensor 31 is installed at the outlet of the solar heater 11. A battery inlet water temperature sensor 32 is installed at the inlet of the battery pack 19, a battery outlet water temperature sensor 33 is installed at the outlet of the battery pack 19, a heat exchange inlet water temperature sensor 34 is installed at the inlet of the water plate heat exchanger 18, and a cooler inlet water temperature sensor 35 is installed at the inlet of the cooler 21. An electric sunshade 36 is also installed above the solar heater 11. Furthermore, the circled numbers in the diagram indicate the valve flow ports. The first three-way proportional valve 13 and the second three-way proportional valve 30 each have three flow ports, and the four-way valve 14 has four flow ports. For the two three-way proportional valves, the 1-3 connection is defined as 100% opening, the 1-2 connection is defined as 0% opening, and any ratio can be linearly adjusted in between. The system's controller is an ECU (not shown in the figure), which can acquire the values ​​of each temperature sensor and control other components.

[0067] For simplicity, component numbers are not shown below. Specifically: the solar heater continuously collects and stores solar energy during system operation; the WPTC is an electric heater that provides sufficient heat to the system when solar energy is unavailable or insufficient; the first three-way proportional valve controls the target heating water temperature of the WPTC loop. When the system requires heating and the solar heater has no heat available, the first three-way proportional valve is 0% open. When the system requires heating and solar energy is available, the valve opening is controlled according to the target loop water temperature. If the opening is 100% and the target loop water temperature is still not met, the WPTC provides supplemental heating; the target loop water temperature here refers to the target value of the battery inlet water temperature or the water-to-water heat exchanger inlet water temperature. When the battery requires heating, the battery inlet water temperature is used as the control target; when the battery does not require heating but the passenger cabin requires heating, the water inlet water temperature is used as the control target. The water inlet temperature of the water plate is the control target; the second three-way proportional valve can control the target water temperature for heating in the cooler circuit. When the passenger cabin has a heating demand, the second three-way proportional valve controls the cooler inlet water temperature. When the water temperature is lower than the target value, the valve opening is increased; when the water temperature is higher than the target value, the valve opening is decreased. The four-way valve is responsible for switching the water circuit. When the battery has a temperature equalization demand or no thermal management demand, it switches to the 1-4 conduction and 2-3 conduction. When the battery has a heating or cooling demand, it switches to the 1-2 conduction and 3-4 conduction. The electric sunshade is responsible for controlling the heating on and off of the solar heater. When the solar water heater is full of heat, the ECU controls the electric sunshade to close and stop collecting solar energy. When the circuit has a heating demand, and the three-way valve opening is greater than the preset opening value, and the duty cycle of the heater pump is greater than the preset ratio, the ECU controls the electric sunshade to open.

[0068] Based on this system, the following functions can be achieved:

[0069] First, the solar-assisted heating battery, the water circulation path for this function is as follows: Figure 3B As shown. When heating a single battery, the four-way valve is in position 1-2 open and 3-4 open. The ECU calculates the target flow rate and target battery inlet water temperature based on the battery heating demand. Then, it controls the duty cycle of the warm air pump drive according to the target flow rate. When the solar water heater has no heat available, the ECU controls the opening of the first proportional three-way valve to 0% and controls the duty cycle of the WPTC opening according to the target battery inlet water temperature. When the solar water heater has heat available, the ECU gradually increases the opening of the first three-way valve while decreasing the duty cycle of the WPTC opening. To reduce system water temperature fluctuations, the upper limit of the opening of the first three-way proportional valve is set to UpLimit. When the opening of the first three-way proportional valve is UpLimit and the water temperature is still not up to standard, the ECU reopens the WPTC.

[0070] In this way, the heat stored in the solar heater is used to heat the battery, thereby reducing the power consumption of the WPTC. When the heat of the solar heater is used up, the ECU controls the three-way valve to open from 1 to 2, that is, to close the solar heating circuit, so that the solar heater continues to store heat, thereby achieving the purpose of intermittent auxiliary heating of the battery by using solar energy circulation, reducing the overall energy consumption of the vehicle.

[0071] Second, the passenger cabin is heated by solar energy. The water circulation path for this function is as follows: Figure 3C As shown. When only the passenger compartment is heated, the four-way valve is in position 1-4 open and 2-3 open. The ECU calculates the target flow rate of the cooler circuit and the target water temperature at the cooler inlet based on the heat load, and determines the target water temperature at the water exchanger inlet. This target water temperature at the water exchanger inlet = target water temperature at the cooler inlet + target correction value. The target correction value is obtained by referring to Table 1 based on the cooler circuit flow rate and the outside temperature. Table 1 is the calibration table for the target correction value, and its contents are shown below:

[0072] Table 1. Calibration Table of Target Correction Values

[0073]

[0074] The ECU controls the heater pump to run at full speed, controls the opening of the second three-way valve to ensure that the actual cooler inlet water temperature reaches the target cooler inlet water temperature, and controls the duty cycle of the WPTC to ensure that the actual water inlet temperature of the water exchanger reaches the target water inlet temperature of the water exchanger.

[0075] In this way, the hot water from the WPTC circuit is transported to the internal condenser via a heat exchange path: water plate heat exchange → cooler heat exchange → compressor refrigerant compression heat exchange, thus achieving heating for the passenger cabin. The heat in the WPTC circuit comes partly from the WPTC electric heating and partly from the solar heater. When there is available heat inside the solar heater, this heat can be used to appropriately reduce the power consumption of the WPTC, thereby reducing electricity consumption.

[0076] Third, the solar-assisted heating battery and passenger cabin; the water circulation path for this function is as follows: Figure 3D As shown. The control of this function is the same as the previous two, the difference being that when the battery and passenger compartment are heated at the same time, the target of the heater pump control is the target flow rate for battery heating, and the target of the WPTC control is the target water temperature at the battery inlet.

[0077] Furthermore, this system in this embodiment can also achieve battery cooling and / or passenger cabin cooling. Moreover, the water exchanger, hot water pump, and second three-way proportional valve in this system can be omitted, i.e., implemented as follows: Figure 3E The structure shown replaces the water-cooled heat exchanger with a cooler, allowing direct heat exchange with the WPTC circuit. In comparison, Figure 3E The implementation cost of the structure is lower, and Figure 3A The structure allows for more precise temperature control. Furthermore, this embodiment can also be applied to electric aircraft and autonomous vehicles. For example, during autonomous passenger pick-up, solar energy can be used to store heat and preheat the passenger cabin based on navigation information, remaining time, and sunlight intensity. Upon arrival at the destination, solar energy can be used to maintain the temperature, improving the user's comfort upon boarding and reducing power consumption.

[0078] Corresponding to the embodiments of the aforementioned methods, this application also provides embodiments of automotive thermal management devices and terminals for their application:

[0079] like Figure 4 As shown, Figure 4 This is a block diagram of an automotive thermal management device provided in an embodiment of this application. The device is applied to the electronic control unit in the automotive thermal management system described in any of the preceding system embodiments; the device includes:

[0080] The drive module 41 is used to control the first three-way proportional valve to switch the heating circuit flowing through the water heat exchanger to the water heating circuit when the outside temperature of the vehicle is lower than the target outside temperature of the vehicle and the temperature of the battery pack is lower than the first battery temperature. It also controls the first water inlet of the four-way valve to connect with the first water outlet, and the second water inlet and the second water outlet to connect, and drives the water heater and the warm air pump to work.

[0081] The control module 42 is used to control the water heater to stop working when the temperature of the battery pack rises to the temperature of the second battery, and to control the first three-way proportional valve to switch the heating circuit flowing through the water heat exchanger to the solar heating circuit.

[0082] The specific implementation process of the functions and roles of each module in the above device can be found in the implementation process of the corresponding steps in the above method, and will not be repeated here.

[0083] This application also provides an electronic device, please refer to [link to application]. Figure 5 , Figure 5 This is a structural block diagram of an electronic device provided in an embodiment of this application. The electronic device may include a processor 510, a communication interface 520, a memory 530, and at least one communication bus 540. The communication bus 540 is used to enable direct communication between these components. In this embodiment, the communication interface 520 of the electronic device is used for signaling or data communication with other node devices. The processor 510 may be an integrated circuit chip with signal processing capabilities.

[0084] The processor 510 described above can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor, or the processor 510 can be any conventional processor.

[0085] The memory 530 may be, but is not limited to, random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), etc. The memory 530 stores computer-readable instructions. When these computer-readable instructions are executed by the processor 510, the electronic device can perform the aforementioned operations. Figure 2 The various steps involved in the method implementation examples.

[0086] Alternatively, the electronic device may also include a storage controller and an input / output unit.

[0087] The memory 530, storage controller, processor 510, peripheral interface, and input / output unit are electrically connected directly or indirectly to achieve data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses 540. The processor 510 is used to execute executable modules stored in the memory 530, such as software function modules or computer programs included in electronic devices.

[0088] The input / output unit is used to provide users with the ability to create tasks and to set optional start periods or preset execution times for those tasks, thereby enabling user-server interaction. The input / output unit may be, but is not limited to, a mouse and keyboard.

[0089] Understandable. Figure 5 The structure shown is for illustrative purposes only; the electronic device may also include components that are more advanced than those shown. Figure 5 The more or fewer components shown, or having the same Figure 5 The different configurations shown. Figure 5 The components shown can be implemented using hardware, software, or a combination thereof.

[0090] This application also provides a storage medium storing instructions. When the instructions are run on a computer, the computer program is executed by a processor to implement the method described in the method embodiment. To avoid repetition, the method will not be described again here.

[0091] This application also provides a computer program product that, when run on a computer, causes the computer to perform the method described in the method embodiment.

[0092] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0093] In addition, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0094] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0095] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0096] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0097] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. An automotive thermal management system, characterized in that, This includes solar heaters, water heaters, first three-way proportional valves, four-way valves, warm air water pumps, battery-powered water pumps, hot water exchange pumps, water-to-water plate heat exchangers, battery packs, and air conditioning systems; among which: The water heater and the warm air pump are connected in sequence between the outlet of the solar heater and the first inlet of the four-way valve; the water-to-water plate heat exchanger and the first three-way proportional valve are connected in sequence between the second outlet of the four-way valve and the inlet of the solar heater; the battery water pump and the battery pack are connected in sequence between the first outlet and the second inlet of the four-way valve. The solar heater, the water heater, the warm air pump, the four-way valve, and the water-to-water plate heat exchanger form a solar heating circuit; the water heater, the warm air pump, the four-way valve, and the water-to-water plate heat exchanger form a water heating circuit; the hot water pump and the cooler of the air conditioning system form a cooler circuit. The first three-way proportional valve includes a first flow channel, a second flow channel, and a third flow channel. The first flow channel is connected to the outlet of the water-to-water plate heat exchanger, the second flow channel is connected to the inlet of the water heater, and the third flow channel is connected to the inlet of the solar heater. The first three-way proportional valve is used to control the switching of the heating circuit flowing through the water-to-water plate heat exchanger between the solar heating circuit and the water heating circuit. The water-to-water plate heat exchanger is internally connected to both the heating circuit and the cooler circuit, and is used to control the heat exchange between the liquid medium in the heating circuit and the liquid medium in the cooler circuit. The vehicle thermal management system further includes: an electronic control unit; the electronic control unit is used to control the first inlet and the first outlet of the four-way valve to be connected, and the second inlet and the second outlet to be connected, and to drive the heater pump to work when the battery pack has a heating or cooling requirement; to control the first inlet and the second outlet of the four-way valve to be connected, and the second inlet and the first outlet to be connected, and to drive the battery water pump to work when the battery pack has a temperature equalization requirement; and to control the first inlet and the second outlet of the four-way valve to be connected, and the second inlet and the first outlet to be connected, when the battery pack does not have a thermal management requirement.

2. The automotive thermal management system according to claim 1, characterized in that, Also includes: Solar water temperature sensor; the solar water temperature sensor is used to detect the water temperature inside the solar heater and report it to the electronic control unit; The electronic control unit is also used to control the first three-way proportional valve to switch the heating circuit flowing through the water-water plate heat exchanger to the solar heating circuit when the water temperature detected by the solar water temperature sensor is greater than the first preset water temperature, and to control the first three-way proportional valve to switch the heating circuit flowing through the water-water plate heat exchanger to the water heating circuit when the water temperature detected by the solar water temperature sensor is less than the second preset water temperature. The first preset water temperature is greater than or equal to the second preset water temperature.

3. The automotive thermal management system according to claim 2, characterized in that, Also includes: Battery inlet water temperature sensor; the battery inlet water temperature sensor is used to detect the water temperature at the inlet of the battery pack and report it to the electronic control unit; The electronic control unit is also used to control the water heater to turn off if the water temperature detected by the battery inlet water temperature sensor is greater than the third preset water temperature after the first three-way proportional valve switches the heating circuit flowing through the water plate heat exchanger to the solar heating circuit, and to control the water heater to turn on if the water temperature detected by the battery inlet water temperature sensor is less than the fourth preset water temperature. The third preset water temperature is greater than or equal to the fourth preset water temperature.

4. The automotive thermal management system according to claim 3, characterized in that, Also includes: Battery outlet water temperature sensor; the battery outlet water temperature sensor is used to detect the water temperature at the battery pack outlet and report it to the electronic control unit; The electronic control unit is also used to adjust the flow rate of the liquid medium flowing through the battery pack by means of the warm air pump and / or the battery pump, based on the water temperature detected by the battery inlet water temperature sensor and the battery outlet water temperature sensor respectively.

5. The automotive thermal management system according to claim 1, characterized in that, Also includes: A cooling inlet water temperature sensor and a second three-way proportional valve; the cooling inlet water temperature sensor is used to detect the water temperature at the inlet of the cooler and report it to the electronic control unit; the second three-way proportional valve is installed on the cooler circuit and is used to control the flow rate of the water flowing into the water-to-water plate heat exchanger from the cooler circuit; The electronic control unit is also used to calculate the target water temperature at the cooler inlet based on the passenger cabin heat load. When the target water temperature at the cooler inlet is greater than the water temperature detected by the cooling inlet water temperature sensor, the flow rate of the cooler circuit into the water-to-water plate heat exchanger is increased through the second three-way proportional valve. When the target water temperature at the cooler inlet is less than the water temperature detected by the cooling inlet water temperature sensor, the flow rate of the cooler circuit into the water-to-water plate heat exchanger is decreased through the second three-way proportional valve.

6. The automotive thermal management system according to claim 5, characterized in that, Also includes: Heat exchanger inlet water temperature sensor; the heat exchanger inlet water temperature sensor is used to detect the water temperature at the inlet of the water-to-water plate heat exchanger and report it to the electronic control unit; The electronic control unit is also used to determine the target water temperature at the inlet of the water-to-water plate heat exchanger based on the target water temperature at the inlet of the cooler and the current flow rate of the cooler circuit. When the battery pack has a temperature equalization requirement or no thermal management requirement, the outlet water temperature of the water heater is controlled based on the difference between the target water temperature at the inlet of the water-to-water plate heat exchanger and the water temperature detected by the heat exchange inlet water temperature sensor.

7. A method for automotive thermal management, characterized in that, An electronic control unit applied in an automotive thermal management system as described in any one of claims 1 to 6; the method includes: When the outside temperature is lower than the target outside temperature and the temperature of the battery pack is lower than the temperature of the first battery, the first three-way proportional valve is controlled to switch the heating circuit flowing through the water plate heat exchanger to the water heating circuit, the first inlet of the four-way valve is connected to the first outlet, and the second inlet and the second outlet are connected, and the water heater and the warm air pump are driven to work. When the temperature of the battery pack rises to the second battery temperature, the water heater is controlled to stop working, and the first three-way proportional valve is controlled to switch the heating circuit flowing through the water plate heat exchanger to the solar heating circuit.

8. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed by a processor, implements the method as described in claim 7.

9. An electronic device, characterized in that, It includes a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method of claim 7.

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