Automobile thermal management system and control method thereof, and vehicle

Abstract

The present application provides an automobile thermal management system and its control method and vehicle, which relate to the field of electric vehicles. The automobile thermal management system includes a valve assembly, a battery circuit, a passenger compartment heating circuit and a heat pump system. The passenger compartment heating circuit includes a series-connected heater core, a water heater and a heating water pump. The water heater is connected to the battery circuit through a valve assembly to form a battery heating circuit or disconnected. The passenger compartment heating circuit is controlled on and off by the valve assembly; the heat pump system exchanges heat with the battery circuit through a heat exchanger to cool the high-voltage battery, and the valve assembly can control the on and off of the heat pump system. The automobile thermal management system of the present application only requires a water heater and a heating water pump, and the water heater is directly involved in the battery heating circuit. There is no need to set up an extra heat exchanger, which reduces the equipment cost, reduces the space occupied by the equipment, and has a simple structure, thereby solving the problem of difficulty in arranging the thermal management system of the whole vehicle and high power consumption.

Description

Technical Field

[0001] The present application relates to the field of electric vehicles, and specifically to an automobile thermal management system and a control method thereof, and a vehicle. Background Art

[0002] At present, electric vehicles are driven by electricity rather than engines. Because electric vehicles do not have the waste heat of the engine of traditional internal combustion engine models, the heating function of the passenger compartment and the heating function of the high-voltage battery need to be configured with additional heating systems or heat sources to achieve. The heating function of the passenger compartment and the heating function of the high-voltage battery of electric vehicles in related technologies generally need to be achieved by high-voltage air heaters and high-voltage water heaters respectively. On the one hand, the high cost of the two heaters leads to high cost of the thermal management system. On the other hand, the two heaters are large in size and have high power consumption at low temperatures, which makes the layout of the whole vehicle difficult and the power consumption of the whole vehicle is high. Summary of the invention

[0003] The embodiments of the present application provide an automobile thermal management system and a control method thereof, and a vehicle, which are used to solve the problems of high cost and difficult layout of automobile thermal management systems.

[0004] In some embodiments, an automobile thermal management system is provided, including a valve assembly, a battery circuit, a passenger compartment heating circuit, and a heat pump system, wherein the battery circuit includes a high-voltage battery, a heat exchanger, and a battery water pump connected in series to form a circuit; the passenger compartment heating circuit includes a heater core, a water heater, and a heating water pump connected in series to form a circuit, the water heater is connected to the battery circuit through the valve assembly to form a battery heating circuit or disconnected, and the passenger compartment heating circuit is controlled on and off by the valve assembly; the heat pump system exchanges heat with the battery circuit through the heat exchanger to cool the high-voltage battery, and the valve assembly can control the on and off of the heat pump system.

[0005] In some embodiments, the valve assembly includes a three-way valve having a first port, a second port, and a third port, the water heater is connected to the first port of the three-way valve, the battery circuit is connected to the second port of the three-way valve, and the heater core is connected to the third port of the three-way valve;

[0006] When the battery heating circuit is connected, opening the first port and the second port of the three-way valve;

[0007] When the passenger compartment heating circuit is connected, the first port and the third port of the three-way valve are opened.

[0008] In some embodiments, the battery circuit further includes a first pipeline, wherein the first pipeline sequentially connects the heat exchanger, the high-voltage battery, and the battery water pump to form a circuit;

[0009] The passenger compartment heating circuit also includes a second pipeline, which sequentially connects the third port of the three-way valve, the heater core, the heating water pump, the water heater, and the first port of the three-way valve.

[0010] In some embodiments, two third pipes are also connected between the battery circuit and the passenger compartment heating circuit, wherein both ends of one of the third pipes are respectively connected to the first pipe and the second pipe, and both ends of the other third pipe are respectively connected to the first pipe and the second port of the three-way valve.

[0011] In some embodiments, the heat pump system includes a compressor and a water-cooled condenser, the valve assembly includes a first electronic expansion valve, the compressor, the water-cooled condenser, the heat exchanger and the first electronic expansion valve are connected in series to form a battery cooling circuit, and the first electronic expansion valve is used to control the on and off of the battery cooling circuit.

[0012] In some embodiments, the heat pump system also includes an evaporator, the valve assembly includes a second electronic expansion valve, the compressor, the water-cooled condenser, the evaporator and the second electronic expansion valve are connected in series to form a passenger compartment circuit, and the second electronic expansion valve is used to control the on and off of the passenger compartment circuit.

[0013] In some embodiments, the automotive thermal management system further includes a radiator, an electric drive system, and an electric drive water pump, and the radiator, the electric drive system, and the electric drive water pump are connected in series to form an electric drive cooling circuit.

[0014] In some embodiments, a method for controlling an automotive thermal management system is provided, comprising:

[0015] Configure an ambient temperature threshold, a first high-voltage battery temperature value, and a second high-voltage battery temperature value, wherein the first high-voltage battery temperature value is less than the second high-voltage battery temperature value;

[0016] When the ambient temperature is less than or equal to the ambient temperature threshold, if the internal temperature of the high-voltage battery is less than the first high-voltage battery temperature value, the battery heating circuit is connected to heat the high-voltage battery; when the internal temperature of the high-voltage battery is greater than or equal to the first high-voltage battery temperature value, the heating of the high-voltage battery is stopped; if the passenger compartment requests heating, the passenger compartment heating circuit is connected to heat the passenger compartment;

[0017] When the ambient temperature is greater than the ambient temperature threshold, if the internal temperature of the high-voltage battery is greater than a second high-voltage battery temperature value, the battery cooling circuit is connected, and the battery cooling circuit exchanges heat with the battery circuit through a heat exchanger to cool the high-voltage battery, and when the internal temperature of the high-voltage battery is less than or equal to the second high-voltage battery temperature value, the high-voltage battery is stopped from being cooled;

[0018] If the passenger compartment requires cooling, the passenger compartment circuit is connected to cool the passenger compartment.

[0019] In some embodiments, the automotive thermal management system control method further includes:

[0020] Configure a first electric drive temperature value and a second electric drive temperature value;

[0021] When the internal temperature of the electric drive system is less than or equal to the first electric drive temperature value, the fan of the radiator does not work;

[0022] When the internal temperature of the electric drive system is greater than the second electric drive temperature value, the fan of the radiator operates at a 100% duty cycle;

[0023] When the internal temperature of the electric drive system is greater than the first electric drive temperature value and less than or equal to the first electric drive temperature value, the fan of the radiator operates at a first duty cycle, 0<first duty cycle<100%.

[0024] In some embodiments, a vehicle is provided, comprising the above-mentioned automotive thermal management system.

[0025] The automotive thermal management system provided in the embodiment of the present application only requires one water heater and one heating water pump, which can realize the battery heating function and the passenger compartment heating function by cooperating with the valve assembly. Compared with the use of two heaters, the present application only requires one, and the water heater is directly involved in the battery heating circuit, without the need to set up additional heat exchangers, thereby reducing equipment costs, reducing equipment space, and having a simple structure, thereby solving the problems of difficulty in arranging the thermal management system for the entire vehicle and high power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 is a schematic diagram of the principle of an automobile thermal management system in some embodiments of the present application;

[0028] Figure 2 yes Figure 1 A schematic diagram of the structure of a three-way valve in an embodiment;

[0029] Figure 3 yes Figure 1 Schematic diagram of the principle of the high-voltage battery independent heating mode in the embodiment;

[0030] Figure 4 yes Figure 1A schematic diagram of the principle of a separate heating mode for the passenger compartment in the embodiment;

[0031] Figure 5 yes Figure 1 Schematic diagram of the principle of the dual heating mode of the passenger compartment and the battery in the embodiment;

[0032] Figure 6 yes Figure 1 Schematic diagram of the principle of the battery independent cooling mode in the embodiment;

[0033] Figure 7 yes Figure 1 A schematic diagram of the principle of a separate cooling mode for the passenger compartment in the embodiment;

[0034] Figure 8 yes Figure 1 Schematic diagram of the principle of the dual cooling mode of the passenger compartment and the battery in the embodiment;

[0035] Fig. 9 yes Figure 1 Schematic diagram of the principle of the electric drive system in the separate cooling mode in the embodiment.

[0036] In the above drawings:

[0037] 11. High-voltage battery; 12. Heat exchanger; 13. Battery water pump;

[0038] 21. Warm air core; 22. Water heater; 23. Heating water pump;

[0039] 31. Compressor; 32. Water-cooled condenser; 33. Evaporator;

[0040] 41. Electric drive system; 42. Radiator; 43. Electric drive water pump;

[0041] 50. Valve assembly; 51. First electronic expansion valve; 52. Second electronic expansion valve; 53. Three-way valve; 531. First port; 532. Second port; 533. Third port;

[0042] 61. First pipeline; 62. Second pipeline; 63. Third pipeline. DETAILED DESCRIPTION

[0043] The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0044] The terms "first", "second", and "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", and "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "including" and "having" in the embodiments of the present application and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or components inherent to these processes, methods, products, or devices.

[0045] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0046] See also Figure 1 , Figure 1 It is a schematic diagram of the principle of the automotive thermal management system in some embodiments of the present application. The embodiment of the present application provides a vehicle, which can be a new energy vehicle such as a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, and the vehicle can be a front-wheel drive vehicle, a rear-wheel drive vehicle, a four-wheel drive vehicle, etc. The vehicle provided in the present application has an automotive thermal management system, and the automotive thermal management system includes a valve assembly 50, a battery circuit, a passenger compartment heating circuit, and a heat pump system. Among them, the battery circuit includes a high-voltage battery 11, a heat exchanger 12, and a battery water pump 13 connected in series to form a circuit. In the battery circuit, the battery water pump 13 can provide a circulating cooling function; the high-voltage battery 11 can provide a power source for the electric vehicle. In general, the high-voltage battery 11 can operate normally within a temperature range of -40°C to +55°C (actual battery temperature). Once this temperature range is exceeded, the operating efficiency of the high-voltage battery 11 may be limited. Therefore, in the thermal management system of the vehicle, it becomes crucial to uniformly control the temperature, cool and heat the high-voltage battery 11. The temperature condition of the high-voltage battery 11 is directly related to the overall performance of the electric vehicle.

[0047] The passenger compartment heating circuit includes a heater core 21, a water heater 22 and a heating water pump 23 connected in series to form a circuit. The water heater 22 is connected to the battery circuit through a valve assembly 50 to form a battery heating circuit or disconnected. The passenger compartment heating circuit is controlled by the valve assembly 50. The water heater 22 can be a high-pressure water heater. In a low-temperature environment, the water heater 22 provides a heat source for the battery heating circuit and the passenger compartment heating circuit. The heater core 21 can transfer the heat provided by the water heater 22 to the passenger compartment to play a role in heating. The heating water pump 23 can drive the liquid medium in the battery heating circuit and the passenger compartment heating circuit to circulate.

[0048] The heat pump system exchanges heat with the battery circuit through the heat exchanger 12 to cool the high-voltage battery 11, and the valve assembly 50 can control the on and off of the heat pump system. The heat pump system can transfer the heat energy of the low-temperature heat source to the high-temperature heat source. In a high-temperature environment, the heat pump system can provide a cold source to directly cool the passenger compartment, or exchange heat with the battery circuit through the heat exchanger 12 to indirectly cool the high-voltage battery 11.

[0049] When the temperature is low, in order to enable the high-voltage battery 11 to start normally from cold and to heat the passenger compartment, the thermal management system provided in the embodiment of the present application can heat the high-voltage battery 11 and the passenger compartment separately, or can perform combined heating. When the temperature is high, the high-voltage battery 11 dissipates a large amount of heat, and using the heat pump system to cool the high-voltage battery 11 can effectively improve the heat dissipation efficiency of the high-voltage battery 11. At the same time, the heat pump system can also cool the passenger compartment according to the needs of the passenger compartment.

[0050] In this embodiment, only one water heater 22 and one heating water pump 23 are needed, and the battery heating function and the passenger compartment heating function can be realized by cooperating with the valve assembly 50. Compared with using two heaters, this application only needs one, and the water heater 22 is directly involved in the battery heating circuit, and there is no need to set up an extra heat exchanger 12, which reduces the equipment cost, reduces the space occupied by the equipment, has a simple structure, and effectively solves the problem of difficulty in arranging the thermal management system of the whole vehicle and high power consumption.

[0051] See also Figure 1 as well as Figure 2 , Figure 2 yes Figure 1Schematic diagram of the structure of the three-way valve in the embodiment. In some embodiments, the valve assembly 50 includes a three-way valve 53, the three-way valve 53 has a first port 531, a second port 532 and a third port 533, the water heater 22 is connected to the first port 531 of the three-way valve 53, the battery circuit is connected to the second port 532 of the three-way valve 53, and the heater core 21 is connected to the third port 533 of the three-way valve 53; when the battery heating circuit is connected, the first port 531 and the second port 532 of the three-way valve 53 are opened; when the passenger compartment heating circuit is connected, the first port 531 and the third port 533 of the three-way valve 53 are opened.

[0052] Specifically, the battery circuit also includes a first pipe 61, which connects the heat exchanger 12, the high-voltage battery 11 and the battery water pump 13 in sequence to form a circuit; the passenger compartment heating circuit also includes a second pipe 62, which connects the third port 533 of the three-way valve 53, the heater core 21, the heating water pump 23, the water heater 22 and the first port 531 of the three-way valve 53 in sequence.

[0053] Furthermore, two third pipes 63 are connected between the battery circuit and the passenger compartment heating circuit, wherein the two ends of one third pipe 63 are respectively connected to the first pipe 61 and the second pipe 62 , and the two ends of the other third pipe 63 are respectively connected to the first pipe 61 and the second port 532 of the three-way valve 53 .

[0054] See also Figure 1 In some embodiments, a refrigerant is used as a medium in the heat pump system. The liquefaction temperature of the refrigerant is low. After absorbing the temperature change of the outside world, the refrigerant is compressed by the compressor 31 and can become a high-temperature and high-pressure gas. Specifically, the heat pump system includes a compressor 31 and a water-cooled condenser 32. The valve assembly 50 includes a first electronic expansion valve 51. The compressor 31, the water-cooled condenser 32, the heat exchanger 12 and the first electronic expansion valve 51 are connected in series to form a battery cooling circuit. The first electronic expansion valve 51 is used to control the on and off of the battery cooling circuit.

[0055] Furthermore, the heat pump system also includes an evaporator 33, the valve assembly 50 includes a second electronic expansion valve 52, the compressor 31, the water-cooled condenser 32, the evaporator 33 and the second electronic expansion valve 52 are connected in series to form a passenger compartment circuit, and the second electronic expansion valve 52 is used to control the on-off of the passenger compartment circuit. In the passenger compartment circuit, by controlling the power of the evaporator 33 and the water-cooled condenser 32, the cooling mode and the heating mode of the passenger compartment can be realized. When the heating mode is turned on, it works as a water-cooled condenser 32, and heats the passenger compartment through the heat released by the water-cooled condenser 32. When the cooling mode is turned on, it works as an evaporator 33, which can absorb heat and cool down the passenger compartment. Based on this, there can be three heating modes in the passenger compartment heating process. The first is to heat the passenger compartment through the passenger compartment heating circuit, the second is to heat the passenger compartment through the passenger compartment circuit, and the third is to heat the passenger compartment through both the passenger compartment heating circuit and the passenger compartment circuit. In this case, the heating power of the water heater 22 can be reduced, thereby effectively reducing the power consumption of the entire vehicle. In this embodiment, the heat pump system can achieve threshold control with the help of temperature sensors, temperature and pressure sensors, etc., combining cold and heat, with a relatively high equipment utilization rate, energy saving, and full utilization of resources, and is relatively environmentally friendly.

[0056] Please continue reading Figure 1 In some embodiments, the automobile thermal management system further includes a radiator 42, an electric drive system 41 and an electric drive water pump 43, and the radiator 42, the electric drive system 41 and the electric drive water pump 43 are connected in series to form an electric drive cooling circuit. The electric drive water pump 43 is used to drive the circulation of the liquid medium in the electric drive cooling circuit, and the radiator 42 can discharge the heat in the electric drive cooling circuit. The electric drive system 41 is the power core of the electric vehicle, responsible for converting the electrical energy stored in the high-voltage battery 11 into mechanical energy to propel the vehicle forward. During the normal operation of the electric drive system 41, heat will continue to be generated due to phenomena such as copper loss and iron loss. As the heat accumulates, the power output capacity of the vehicle will gradually weaken. Therefore, the heat dissipation problem of the electric drive system 41 needs to be considered in the design stage. In the automobile thermal management system of the present application, the electric drive cooling circuit is used as an independent circuit to dissipate heat for the electric drive system 41. It can dissipate heat for the electric drive system 41 alone during the operation of the vehicle, or it can be combined with the battery cooling function, the passenger compartment cooling function, the battery heating function, the passenger compartment heating function, etc. to realize the heat dissipation function of the electric drive system 41.

[0057] In some embodiments, the present application also provides a method for controlling an automotive thermal management system, including:

[0058] An ambient temperature threshold, a first high-voltage battery temperature value, and a second high-voltage battery temperature value are configured, and the first high-voltage battery temperature value is less than the second high-voltage battery temperature value.

[0059] When the ambient temperature is less than or equal to the ambient temperature threshold, if the internal temperature of the high-voltage battery is less than the first high-voltage battery temperature value, the battery heating circuit is connected to heat the high-voltage battery 11; when the internal temperature of the high-voltage battery is greater than or equal to the first high-voltage battery temperature value, the heating of the high-voltage battery 11 is stopped; if the passenger compartment requests heating, the passenger compartment heating circuit is connected to heat the passenger compartment;

[0060] In this embodiment, when performing separate heating and combined heating of the high-voltage battery 11 and the passenger compartment, based on the coupling method of each circuit in the above-mentioned thermal management system, the corresponding heating mode can be achieved by regulating the opening or closing of each port of the three-way valve 53.

[0061] See also Figures 3 to 5 , Figure 3 yes Figure 1 Schematic diagram of the principle of the high-voltage battery independent heating mode in the embodiment. Figure 4 yes Figure 1 Schematic diagram of the principle of the passenger compartment separate heating mode in the embodiment, Figure 5 yes Figure 1 Schematic diagram of the dual heating mode of the passenger compartment and the battery in the embodiment, Figures 3 to 5 The solid line indicates the connected state, and the dotted line indicates the disconnected state.

[0062] In the independent heating mode of the high-voltage battery 11, the first port 531 and the second port 532 of the three-way valve 53 are opened, and the third port 533 of the three-way valve 53 is closed. The liquid medium flowing out of the heating water pump 23 is heated by the water heater 22, and flows back to the heating water pump 23 through the first port 531, the second port 532, and the high-voltage battery 11.

[0063] In the separate heating mode of the passenger compartment, the first port 531 and the third port 533 of the three-way valve 53 are opened, and the second port 532 of the three-way valve 53 is closed. The liquid medium flowing out of the heating water pump 23 is heated by the water heater 22, and flows back to the heating water pump 23 through the first port 531, the third port 533, and the heater core 21.

[0064] In the dual heating mode of the battery and the passenger compartment, the first port 531, the second port 532 and the third port 533 of the three-way valve 53 are opened at the same time, and the liquid medium flowing out of the heating water pump 23 is heated by the water heater 22. A part of the liquid medium flows back to the heating water pump 23 through the first port 531, the second port 532 and the high-voltage battery 11, and the other part flows back to the heating water pump 23 through the first port 531, the third port 533 and the heater core 21.

[0065] When the ambient temperature is greater than the ambient temperature threshold, if the internal temperature of the high-voltage battery is greater than the second high-voltage battery temperature value, the battery cooling circuit is connected, and the battery cooling circuit exchanges heat with the battery circuit through a heat exchanger to cool the high-voltage battery 11. When the internal temperature of the high-voltage battery is less than or equal to the second high-voltage battery temperature value, cooling of the high-voltage battery 11 is stopped; if the passenger compartment requests cooling, the passenger compartment circuit is connected to cool the passenger compartment.

[0066] In this embodiment, when performing separate cooling and combined cooling of the high-voltage battery 11 and the passenger compartment, based on the coupling method of each circuit in the above-mentioned thermal management system, the corresponding cooling mode can be achieved by regulating the opening or closing of the first electronic expansion valve 51 and the second electronic expansion valve 52.

[0067] See also Figures 6 to 8 , Figure 6 yes Figure 1 Schematic diagram of the principle of the battery independent cooling mode in the embodiment, Figure 7 yes Figure 1 Schematic diagram of the principle of the passenger compartment separate cooling mode in the embodiment, Figure 8 yes Figure 1 Schematic diagram of the dual cooling mode of the passenger compartment and the battery in the embodiment, Figures 6 to 8 The solid line indicates the connected state, and the dotted line indicates the disconnected state.

[0068] In the independent cooling mode of the high-voltage battery 11 , the first electronic expansion valve 51 is opened, the second electronic expansion valve 52 is closed, and the battery water pump 13 works to drive the circulation of the liquid matrix in the battery cooling circuit and exchanges heat with the liquid medium in the battery cooling circuit through the heat exchanger 12 .

[0069] In the passenger compartment separate cooling mode, the second electronic expansion valve 52 is opened and the first electronic expansion valve 51 is closed. The refrigerant in the passenger compartment circuit is continuously liquefied and vaporized through the water-cooled condenser 32 and the evaporator 33, transferring the heat in the passenger compartment to the outside of the vehicle.

[0070] In the simultaneous cooling mode of the high-voltage battery 11 and the passenger compartment, the first electronic expansion valve 51 and the second electronic expansion valve 52 are opened at the same time, the battery cooling circuit and the passenger compartment circuit are connected in parallel, part of the refrigerant exchanges heat with the battery circuit through the heat exchanger 12, and part of it is vaporized by the evaporator 33 to absorb the heat of the passenger compartment.

[0071] In some embodiments, the vehicle thermal management system control method further includes:

[0072] Configure a first electric drive temperature value and a second electric drive temperature value;

[0073] When the internal temperature of the electric drive system is less than or equal to the first electric drive temperature value, the fan of the radiator 42 does not work;

[0074] When the internal temperature of the electric drive system is greater than the second electric drive temperature value, the fan of the radiator 42 operates at a 100% duty cycle;

[0075] When the internal temperature of the electric drive system is greater than the first electric drive temperature value and less than or equal to the first electric drive temperature value, the fan of the radiator 42 runs at a first duty cycle, 0<first duty cycle<100%, usually, the first duty cycle can be 50%.

[0076] See also Fig. 9 , Fig. 9 yes Figure 1 Schematic diagram of the principle of the electric drive system in the embodiment in the separate cooling mode, Fig. 9 The solid line indicates the connected state, and the dotted line indicates the disconnected state. In the electric drive system 41 single cooling mode, the electric drive water pump 43 works with the radiator 42, and the liquid medium flowing out of the electric drive water pump 43 is cooled by the radiator 42 and then flows back to the electric drive water pump 43. It can be understood that the cooling mode of the electric drive system 41 can also be combined with the passenger compartment cooling mode and the high-voltage battery 11 cooling mode to form a variety of combined cooling modes, which will not be repeated here.

[0077] In the embodiment of the present application, the ambient temperature threshold, the first high-voltage battery temperature value, the second high-voltage battery temperature value, the first electric drive temperature value, and the second electric drive temperature value are set according to actual needs.

[0078] For example, the ambient temperature threshold may be between -10 and 10°C, and specifically may be -10°C, -5°C, 0°C, 5°C, or 10°C.

[0079] The first high-voltage battery temperature value may be between -25 and -15°C, and specifically may be -25°C, -23°C, -20°C, -18°C, or -15°C.

[0080] The second high-voltage battery temperature value may be between 30°C and 50°C, and specifically may be 30°C, 35°C, 40°C, 45°C, or 50°C.

[0081] The first electric drive temperature value may be between 30°C and 45°C, and specifically may be 30°C, 35°C, 40°C, or 45°C.

[0082] The second electric drive temperature value may be between 55°C and 65°C, and specifically may be 30°C, 60°C, or 65°C.

[0083] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An automotive thermal management system, characterized in that: include: Valve components; A battery circuit, including a high-voltage battery, a heat exchanger, and a battery water pump connected in series to form a circuit; A passenger compartment heating circuit, comprising a heating core body, a water heater and a heating water pump connected in series to form a circuit, the water heater and the battery circuit are connected or disconnected through the valve assembly to form a battery heating circuit, and the passenger compartment heating circuit is controlled on and off by the valve assembly; A heat pump system, wherein the heat pump system exchanges heat with the battery circuit through a heat exchanger to cool the high-voltage battery, and the valve assembly can control the on and off of the heat pump system.

2. The automotive thermal management system according to claim 1, characterized in that: The valve assembly includes a three-way valve, the three-way valve has a first port, a second port and a third port, the water heater is connected to the first port of the three-way valve, the battery circuit is connected to the second port of the three-way valve, and the heater core is connected to the third port of the three-way valve; When the battery heating circuit is connected, opening the first port and the second port of the three-way valve; When the passenger compartment heating circuit is connected, the first port and the third port of the three-way valve are opened.

3. The automotive thermal management system according to claim 2, characterized in that: The battery circuit further includes a first pipeline, which sequentially connects the heat exchanger, the high-voltage battery, and the battery water pump to form a circuit; The passenger compartment heating circuit also includes a second pipeline, which sequentially connects the third port of the three-way valve, the heater core, the heating water pump, the water heater, and the first port of the three-way valve.

4. The automotive thermal management system according to claim 3, characterized in that: Two third pipes are also connected between the battery circuit and the passenger compartment heating circuit, wherein both ends of one of the third pipes are respectively connected to the first pipe and the second pipe, and both ends of the other third pipe are respectively connected to the first pipe and the second port of the three-way valve.

5. The automotive thermal management system according to any one of claims 1 to 4, characterized in that: The heat pump system includes a compressor and a water-cooled condenser, and the valve assembly includes a first electronic expansion valve. The compressor, the water-cooled condenser, the heat exchanger and the first electronic expansion valve are connected in series to form a battery cooling circuit, and the first electronic expansion valve is used to control the on and off of the battery cooling circuit.

6. The automotive thermal management system according to claim 5, characterized in that: The heat pump system also includes an evaporator, the valve assembly includes a second electronic expansion valve, the compressor, the water-cooled condenser, the evaporator and the second electronic expansion valve are connected in series to form a passenger compartment circuit, and the second electronic expansion valve is used to control the on-off of the passenger compartment circuit.

7. The automotive thermal management system according to claim 6, characterized in that: The automobile thermal management system further includes a radiator, an electric drive system and an electric drive water pump. The radiator, the electric drive system and the electric drive water pump are connected in series to form an electric drive cooling circuit.

8. A method for controlling an automobile thermal management system, characterized in that: include: Configure an ambient temperature threshold, a first high-voltage battery temperature value, and a second high-voltage battery temperature value, wherein the first high-voltage battery temperature value is less than the second high-voltage battery temperature value; When the ambient temperature is less than or equal to the ambient temperature threshold, if the internal temperature of the high-voltage battery is less than the first high-voltage battery temperature value, the battery heating circuit is connected to heat the high-voltage battery; when the internal temperature of the high-voltage battery is greater than or equal to the first high-voltage battery temperature value, the heating of the high-voltage battery is stopped; if the passenger compartment requests heating, the passenger compartment heating circuit is connected to heat the passenger compartment; When the ambient temperature is greater than the ambient temperature threshold, if the internal temperature of the high-voltage battery is greater than a second high-voltage battery temperature value, the battery cooling circuit is connected, and the battery cooling circuit exchanges heat with the battery circuit through a heat exchanger to cool the high-voltage battery, and when the internal temperature of the high-voltage battery is less than or equal to the second high-voltage battery temperature value, the high-voltage battery is stopped from being cooled; If the passenger compartment requires cooling, the passenger compartment circuit is connected to cool the passenger compartment.

9. The automotive thermal management system control method according to claim 8, characterized in that: The automotive thermal management system control method further includes: Configure a first electric drive temperature value and a second electric drive temperature value; When the internal temperature of the electric drive system is less than or equal to the first electric drive temperature value, the fan of the radiator does not work; When the internal temperature of the electric drive system is greater than the second electric drive temperature value, the fan of the radiator operates at a 100% duty cycle; When the internal temperature of the electric drive system is greater than the first electric drive temperature value and less than or equal to the first electric drive temperature value, the fan of the radiator operates at a first duty cycle, 0<first duty cycle<100%.

10. A vehicle, characterized in that: The automotive thermal management system comprises any one of claims 1 to 7.

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