Thermal management control method, system and vehicle of electric vehicle

Abstract

A thermal management control method, system and vehicle for an electric vehicle, comprising determining a thermal management request for the vehicle based on heating requests for a battery and a passenger compartment, and a current ambient temperature; determining corresponding components in a target heating circuit and a heat source circuit based on the thermal management request; the heat source circuit comprising an air-conditioning heat pump circuit, a first bypass auxiliary heating component, a second bypass auxiliary heating component and a third bypass auxiliary heating component; the target heating circuit comprising a passenger compartment heating circuit and a battery heating circuit; controlling corresponding components of the heat source circuit to perform heat exchange with the target heating circuit; the above divides different requirements for heating the battery and the passenger compartment according to different ambient temperatures, and different heat source circuits can be changed and matched according to different requirements to avoid a single fixed heat source from having too high or too low heat when responding to different requirements. Different working modes can be used at different ambient temperatures to meet passenger compartment heating and battery heating, eliminate PTC, reduce energy consumption and cost, and increase cruising range.

Description

Technical Field

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

[0002] The battery is a key component of new energy electric vehicles. Its performance and lifespan largely determine the overall performance and lifespan of the vehicle, and battery range is also a key performance indicator. To achieve optimal performance, the battery must operate within an appropriate temperature range. During charging, the battery's temperature rises rapidly, easily exceeding the optimal operating temperature range, necessitating a refrigeration system to cool the battery.

[0003] In the related technologies, most of the thermal management circuits of electric vehicles independently set up and manage the cab thermal management and fuel cell thermal management, but do not coordinate and uniformly carry out integrated thermal management, which makes the overall thermal management energy consumption of fuel cell vehicles high and some heat energy cannot be reused. Therefore, a patent application for the specific architecture of the vehicle thermal management system has been filed on the same day. However, due to different heating requirements in different vehicle usage scenarios, it is necessary to design corresponding control strategies for its architecture to accurately and efficiently utilize heat. Therefore, a thermal management control method, system and vehicle for electric vehicles are proposed. Summary of the Invention

[0004] The present application provides a thermal management control method, system, device and computer-readable storage medium for electric vehicles, which can solve the problems in the prior art that the cab thermal management and fuel cell thermal management of the electric vehicle thermal management circuit are independently set and poorly coordinated, and the related control strategies do not take into account different vehicle usage scenarios, resulting in poor energy utilization and high overall thermal management energy consumption of battery vehicles.

[0005] In a first aspect, an embodiment of the present application provides a thermal management control method for an electric vehicle, comprising:

[0006] Determine the vehicle's thermal management requirements based on battery and passenger compartment heating requests and the current ambient temperature;

[0007] Determining a target heating circuit and corresponding components in a heat source circuit according to a thermal management request; the heat source circuit includes an air conditioning heat pump circuit, a first bypass auxiliary heating component, a second bypass auxiliary heating component, and a third bypass auxiliary heating component; and the target heating circuit includes a passenger compartment heating circuit and a battery heating circuit.

[0008] Control the corresponding components of the heat source circuit to exchange heat with the target heating circuit.

[0009] In one embodiment, determining a vehicle thermal management request based on battery and passenger compartment heating requests and a current ambient temperature includes the following steps:

[0010] If the current ambient temperature is greater than a first preset value and a passenger compartment heating request is received, outputting a thermal management request 1;

[0011] If the current ambient temperature is less than a first preset value and within a first preset range, and a passenger compartment heating request is received, determining whether the battery requires cooling; if cooling is not required, outputting a second thermal management request; if cooling is required, outputting a third thermal management request;

[0012] If the current ambient temperature is within the second preset range and a battery heating request is received, a fourth thermal management request is output;

[0013] If the current ambient temperature is within the second preset range and a battery heating request and a passenger compartment heating request are received, a thermal management request five is output.

[0014] In one embodiment, when a thermal management request 1 is output, the heat source circuit includes an air conditioning heat pump circuit, and the target heating circuit includes a passenger cabin heating circuit;

[0015] Controlling the corresponding components of the heat source circuit to perform heat exchange with the target heating circuit includes the following steps:

[0016] Run the compressor in the air-conditioning heat pump circuit, and turn on the fourth expansion valve and the front-end cooling fan of the outdoor heat exchanger to absorb heat from the external air; run the second water pump of the passenger compartment heating circuit and the fan of the air-conditioning heater equipment, and control the opening angle of the first multi-way water valve to exchange the generated heat with the passenger compartment heating circuit.

[0017] In one embodiment, when a second thermal management request is output, the heat source circuit includes an air conditioning heat pump circuit and a first bypass auxiliary heating component, and the target heating circuit includes a passenger cabin heating circuit;

[0018] Controlling the corresponding components of the heat source circuit to perform heat exchange with the target heating circuit includes the following steps:

[0019] Run the compressor in the first bypass auxiliary heating component and the air conditioning heat pump circuit, open the fourth expansion valve, and turn off the front-end cooling fan of the outdoor heat exchanger to store heat;

[0020] After heat storage is completed, the second water pump of the passenger compartment heating circuit and the fan of the air conditioning heater device are operated, and the opening angle of the first multi-way water valve is controlled to heat exchange the generated heat with the passenger compartment heating circuit.

[0021] In one embodiment, when a thermal management request three is output, the heat source circuit includes an air conditioning heat pump circuit, a first bypass auxiliary heating component, and a third bypass auxiliary heating component, and the target heating circuit includes a passenger cabin heating circuit;

[0022] Controlling the corresponding components of the heat source circuit to perform heat exchange with the target heating circuit includes the following steps:

[0023] Close the fourth expansion valve and the second expansion valve, open the first on-off valve and the third expansion valve, then run the compressor and the first bypass auxiliary heat component in the air conditioning heat pump circuit, and use the third bypass auxiliary heat component to absorb heat from the battery for heat storage;

[0024] After heat storage is completed, the second water pump in the passenger compartment heating circuit and the fan of the air conditioning heater device are operated, and the opening angle of the first multi-way water valve is controlled to heat exchange the generated heat with the passenger compartment heating circuit.

[0025] In one embodiment, when a thermal management request 4 is output, the heat source circuit includes an air conditioning heat pump circuit, a first bypass auxiliary heating component, and a second bypass auxiliary heating component, and the target heating circuit includes a battery heating circuit;

[0026] Controlling the corresponding components of the heat source circuit to perform heat exchange with the target heating circuit includes the following steps:

[0027] The fourth expansion valve and the third expansion valve are closed, the first on-off valve and the second expansion valve are opened, and then the compressor and the first bypass auxiliary heating component in the air conditioning heat pump circuit are operated, and the second bypass auxiliary heating component is used to heat the warm air core of the air conditioning heater device, and the fan of the air conditioning heater device is turned off to store heat;

[0028] After heat storage is completed, the second water pump in the passenger compartment heating circuit and the first water pump in the battery heating circuit are operated, and the opening angles of the first multi-way water valve and the second multi-way water valve are controlled to transfer the generated heat through the passenger compartment heating circuit to the battery heating circuit for heat exchange.

[0029] In one embodiment, when a thermal management request 5 is output, the heat source circuit includes an air conditioning heat pump circuit, a first bypass auxiliary heating component, and a second bypass auxiliary heating component, and the target heating circuit includes a passenger cabin heating circuit and a battery heating circuit;

[0030] Controlling the corresponding components of the heat source circuit to perform heat exchange with the target heating circuit includes the following steps:

[0031] The fourth expansion valve and the third expansion valve are closed, the first on-off valve and the second expansion valve are opened, and then the compressor and the first bypass auxiliary heating component in the air conditioning heat pump circuit are operated, and the second bypass auxiliary heating component is used to heat the warm air core of the air conditioning heater device, and the fan of the air conditioning heater device is turned off to store heat;

[0032] After heat storage is completed, the fan of the air-conditioning heater device is turned on, the second water pump in the passenger compartment heating circuit and the first water pump in the battery heating circuit are operated, and the opening angles of the first multi-way water valve and the second multi-way water valve are controlled to exchange the generated heat with the passenger compartment heating circuit and the battery heating circuit.

[0033] In one embodiment, determining a vehicle thermal management request based on heating requests for the battery and passenger compartment and a current ambient temperature further includes the following steps:

[0034] If the current ambient temperature is within the second preset range and a battery heating request and a passenger compartment heating request are received, determining whether the vehicle is in a parked state; if the vehicle is not in a parked state, outputting a fifth thermal management request; if the vehicle is in a parked state, outputting a sixth thermal management request; the heat source circuit corresponding to the sixth thermal management request includes the air conditioning heat pump circuit and the first bypass auxiliary heating component; and the target heating circuit includes the passenger compartment heating circuit and the battery heating circuit.

[0035] Controlling the corresponding components of the heat source circuit to perform heat exchange with the target heating circuit also includes the following steps:

[0036] Open the fourth expansion valve, turn off the front-end cooling fan of the outdoor heat exchanger, run the compressor in the first bypass auxiliary heating component and the air-conditioning heat pump circuit, and open the fourth expansion valve, turn off the front-end cooling fan of the outdoor heat exchanger, turn off the fan of the air-conditioning heater device, and store heat; after the heat storage is completed, turn on the fan of the air-conditioning heater device, run the second water pump in the passenger compartment heating circuit and the first water pump in the battery heating circuit, and control the opening angle of the first multi-way water valve and the second multi-way water valve to exchange the generated heat with the passenger compartment heating circuit and the battery heating circuit.

[0037] In a second aspect, an embodiment of the present application provides a thermal management system for an electric vehicle, comprising:

[0038] a thermal management controller connected to the air conditioning heat pump circuit, the first bypass auxiliary heating component, the second bypass auxiliary heating component, the third bypass auxiliary heating component, the passenger compartment heating circuit, and the battery heating circuit;

[0039] The thermal management controller is used to determine the vehicle's thermal management request based on the heating requests for the battery and passenger compartment, as well as the current ambient temperature; determine the target heating circuit and the corresponding components in the heat source circuit based on the thermal management request; and control the corresponding components of the heat source circuit to perform heat exchange with the target heating circuit.

[0040] In a third aspect, an embodiment of the present application provides a vehicle comprising: a thermal management controller, an air conditioning heat pump circuit, a first bypass auxiliary heating component, a second bypass auxiliary heating component, a third bypass auxiliary heating component, a passenger compartment heating circuit, and a battery heating circuit, and a memory connection; the memory is configured to store one or more programs;

[0041] The one or more programs are executed by the thermal management controller to implement a thermal management control method for an electric vehicle.

[0042] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0043] By determining the vehicle's thermal management request based on the heating requests for the battery and passenger compartment, as well as the current ambient temperature, different demands for heating the battery and passenger compartment at different ambient temperatures are divided. Different heat source circuits can also be changed and matched according to different demands to avoid the situation where a single fixed heat source produces too much or too little heat when responding to different demands. Different working modes can be used at different ambient temperatures to meet the heating of the passenger compartment and battery, which can eliminate PTC, reduce energy consumption, reduce costs, and increase cruising range. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of a thermal management system in an embodiment of the present application;

[0045] Figure 2 Schematic diagram of components used in the thermal management system in the first and third working conditions in an embodiment of the present application;

[0046] Figure 3 Schematic diagram of components used in the thermal management system in the second working condition in an embodiment of the present application;

[0047] Figure 4 Schematic diagram of components used in the thermal management system in the fourth working condition in an embodiment of the present application

[0048] Figure 5 Schematic diagram of components used in the thermal management system in the fifth and sixth working conditions in an embodiment of the present application;

[0049] Figure 6 This is a flow chart of a thermal management control method for an electric vehicle involved in an embodiment of the present application.

[0050] In the figure: 1. Refrigerant circuit; 11. Water-cooled condenser; 12. Compressor; 13. Gas-liquid separator; 2. Passenger compartment heating circuit; 21. First multi-way water valve; 3. Outdoor heat exchange equipment; 31. Outdoor heat exchanger; 32. Fourth expansion valve; 4. Air conditioning heater equipment; 41. Front air conditioning internal heater; 42. Rear air conditioning internal heater; 5. Battery heating circuit; 51. Battery heating pipeline; 52. Heat exchanger; 53. Battery cooler; 54. First water pump; 55. Second multi-way water valve; 61. First bypass pipeline; 62. First expansion valve; 63. Second bypass pipeline; 64. Air conditioning evaporator; 65. Second expansion valve; 66. First control valve; 7. Battery; 8. Third bypass pipeline; 81. Third expansion valve; 91. First switch valve. DETAILED DESCRIPTION

[0051] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0052] The battery mentioned below is the power battery that provides power to the vehicle.

[0053] In order to make the purpose, technical solutions and advantages of this application clearer, the system architecture of the thermal management of the electric vehicle mentioned in this application and the specific flow of each component will be further described in detail with reference to the accompanying drawings.

[0054] Reference Attachment Figure 1-5 , it should be noted that, Figure 1-Figure 5 The lines connecting the various devices in the figure are pipelines. The solid lines represent pipelines in which refrigerant circulates, while the dotted lines represent pipelines in which circulating water for heat exchange is transported.

[0055] A vehicle thermal management system, such as Figure 1 As shown, it includes: a thermal management controller, a refrigerant circuit 1, a passenger compartment heating circuit 2, and a battery heating circuit 5. For convenience, the refrigerant circuit 1 is referred to as the heat source circuit below; the thermal management controller is connected to the air conditioning heat pump circuit, the first bypass auxiliary heating component, the second bypass auxiliary heating component, the third bypass auxiliary heating component, the passenger compartment heating circuit 2, and the battery heating circuit 5.

[0056] Among them, the part of the heat source circuit except the bypass heat auxiliary equipment is called the air-conditioning heat pump circuit, which is also a basic circuit. For the convenience of describing the control method in the following text, it is written as the air-conditioning heat pump circuit, which includes a water-cooled condenser 11, a compressor 12, a gas-liquid separator 13 and an outdoor heat exchange device 3.

[0057] The pipeline of the refrigerant circuit 1 is provided with a heat pump device equipped with a water-cooled condenser 11, a bypass heat auxiliary device and an outdoor heat exchange device 3, and the outdoor heat exchange device 3 has a front-end cooling fan; the bypass heat auxiliary device and the outdoor heat exchange device 3 can be turned on selectively or simultaneously to improve the heating efficiency of the heat pump device; the passenger compartment heating circuit 2 is provided with circulating water, and the passenger compartment heating circuit 2 is provided with an air-conditioning heater device 4, and the passenger compartment heating circuit 2 is connected to the water side of the water-cooled condenser 11; the battery heating circuit 5, part of which is arranged in the battery 7, and circulating water is conveyed in the battery heating circuit 5, and the battery heating circuit 5 is connected to the passenger compartment heating circuit 2 through the heat exchanger 52. The battery heating circuit 5 can exchange heat with the passenger compartment heating circuit 2 through the heat exchanger 52 to heat the battery 7.

[0058] The refrigerant circuit 1 includes: a compressor 12 and a gas-liquid separator 13; the compressor 12, whose output port is connected to the input port of the water-cooled condenser 11 through a refrigerant pipeline; the gas-liquid separator 13, whose output port is connected to the input port of the compressor 12 through a refrigerant pipeline, and the input port of the gas-liquid separator 13 is connected to the output port of the water-cooled condenser 11.

[0059] The working principle of the compressor 12 is as follows: the compressor 12 sucks low-temperature, low-pressure refrigerant into the machine, and drives the rotor inside the compressor 12 to rotate through the electric motor, compressing the refrigerant into a high-temperature, high-pressure gas and then discharging it. During the pressurization process, the refrigerant releases heat, making the temperature of the high-temperature, high-pressure gas discharged by the compressor 12 higher. Then, the high-temperature, high-pressure gas is sent to the gas side of the water-cooled condenser 11 for cooling, so that it is cooled and condensed into a high-pressure liquid. The liquid high-pressure refrigerant expands through the expansion valve and becomes a low-temperature, low-pressure refrigerant, which is then sucked into the compressor 12, completing a complete refrigeration or heating cycle of the heat pump compressor. Therefore, an expansion valve is provided on the pipeline connection between the water-cooled condenser 11 and the gas-liquid separator 13 in the refrigerant circuit 1. Furthermore, the gas-liquid separator 13 is used to prevent the liquid refrigerant from hitting the compressor, ensuring the safe and normal operation of the compressor 12.

[0060] It is worth noting that the refrigerant circuit 1 in this application, which serves as the heat source of the thermal management system, is equipped with two thermal auxiliary modes: bypass thermal auxiliary equipment (the bypass thermal auxiliary equipment also has several forms, which will be described later) and outdoor heat exchange equipment 3.

[0061] The two devices can be used simultaneously or individually to adapt to different working conditions. Furthermore, the refrigerant circuit 1 is equipped with a switching valve at each branch to switch the flow direction of the coolant, so that the heat source supply method can be switched between the two devices, or both devices can be turned on simultaneously.

[0062] When the outside temperature is slightly low, the outdoor heat exchanger 3 can normally absorb heat from the air to heat the refrigerant flowing through the outdoor heat exchanger 3, thereby increasing the temperature of the refrigerant flowing to the water-cooled condenser 11 and exchanging heat with the passenger compartment heating circuit 2, thereby achieving the passenger compartment heating function with less energy consumption. However, when the temperature drops, the heat exchange efficiency of the outdoor heat exchanger 3 decreases, and it is necessary to accelerate the heating efficiency of the heat pump device through the bypass thermal auxiliary device. The outdoor heat exchanger 3 absorbs heat from the external air and has low energy consumption. However, it is affected by temperature and has low operating efficiency under extreme operating conditions, which cannot meet thermal management requirements. Therefore, it is necessary to cooperate with the bypass thermal auxiliary device to complete thermal management for various operating conditions.

[0063] In some preferred embodiments, the bypass thermal auxiliary device includes: a first bypass thermal auxiliary component, the first bypass thermal auxiliary component includes a first bypass line 61 and a first control valve 66; wherein,

[0064] The first bypass line 61 has its input side connected to the output port of the compressor 12 , and a first control valve 66 is provided on the output side of the first bypass line 61 , and the first control valve 66 is connected to the input port of the gas-liquid separator 13 ; a first expansion valve 62 is provided on the first bypass line 61 .

[0065] It is understandable that if Figure 1 As shown, the operating principle of the bypass heat auxiliary device and heat pump device in the above embodiment includes: the pipeline of the refrigerant circuit 1 including the compressor 12 and the gas-liquid separator 13 is arranged in parallel with the first bypass pipeline 61. In other words, the high-temperature and high-pressure refrigerant from the compressor 12 passes through the first bypass pipeline 61, the first expansion valve 62, and returns to the gas-liquid separator 13. The other path enters the water-cooled condenser 11 for heat exchange.

[0066] It is worth noting that the first expansion valve 62 arranged in parallel can accelerate the efficiency of converting liquid high-pressure refrigerant into low-temperature low-pressure refrigerant, thereby improving the working efficiency of the compressor 12 and improving the heating efficiency of the heat pump equipment.

[0067] In some preferred embodiments, the bypass heat auxiliary device further comprises: a second bypass heat auxiliary component, which comprises a second bypass line 63 and an air conditioning evaporator 64; wherein,

[0068] The second bypass line 63, the input side of which can be connected to the output port of the water-cooled condenser 11 through the first switch valve 91; the output side of the second bypass line 63 is connected to the input port of the gas-liquid separator 13; the air-conditioning evaporator 64, which is arranged on the second bypass line 63, and the position of the air-conditioning evaporator 64 corresponds to the position of the air-conditioning heater device 4; the second expansion valve 65, which is arranged on the second bypass line 63, and the second expansion valve 65 is connected to the input side of the air-conditioning evaporator 64.

[0069] It is worth noting that the second expansion valve 65 is used to convert the high-pressure refrigerant output by the water-cooled condenser 11 into low-temperature, low-pressure refrigerant by expanding it. The air conditioning evaporator 64, taking advantage of the liquid low-temperature refrigerant's tendency to evaporate at low pressure, converts it into vapor, which absorbs heat to heat the air conditioning heater 4.

[0070] In some preferred embodiments, the bypass heat auxiliary device further comprises: a third bypass heat auxiliary component, which comprises a third bypass line 8 and a third expansion valve 81; wherein,

[0071] The third bypass line 8 has an input side that can be connected to the output port of the water-cooled condenser 11 through the second bypass line 63 , and an output side portion of the third bypass line 8 passes through the battery heating circuit 5 and is connected to the input port of the gas-liquid separator 13 ; a third expansion valve 81 is provided on the third bypass line 8 .

[0072] It is understood that the operating principle of the third bypass heat assist assembly is similar to that of the first bypass heat assist assembly, both utilizing an expansion valve to accelerate the efficiency of the heat pump. Furthermore, the third bypass line 8 passes through the battery heating circuit 5 to absorb excess heat generated by the battery heating circuit 5 after operation.

[0073] In some optional embodiments, at least one pipeline control valve is provided on each of the first bypass pipeline 61 , the second bypass pipeline 63 and the third bypass pipeline 8 to cut off or open the pipeline.

[0074] Preferably, a first control valve 66 is provided at the input port of the gas-liquid separator 13 of the heat pump equipment. The first control valve 66 is connected to the first bypass pipeline 61, the second bypass pipeline 63, the third bypass pipeline 8 and the input port of the gas-liquid separator 13. Therefore, the first control valve 66 can cut off the above pipelines to realize the opening and closing of the above-mentioned first bypass thermal auxiliary component, the second bypass thermal auxiliary component and the third bypass thermal auxiliary component.

[0075] In some specific embodiments, the battery heating circuit 5 includes:

[0076] A battery heating pipeline 51 is provided with a first water pump 54, and the battery heating pipeline 51 is passed through the battery 7. A heat exchanger 52 is provided on the battery heating pipeline 51, and two pipelines are provided in the heat exchanger 52, one of which is connected to the battery heating pipeline 51, and the other is connected to the passenger compartment heating circuit 2; a battery cooler 53 is provided on the battery heating pipeline 51, and a second bypass pipeline 63 is passed through the battery cooler 53.

[0077] It is understandable that a portion of the battery cooler 53 is passed through by the second bypass line 63 , and the second bypass line 63 can absorb the waste heat of the battery cooler 53 to heat the passenger compartment, thereby saving energy consumption.

[0078] In some specific embodiments, the outdoor heat exchange device 3 includes: an outdoor heat exchanger 31 and a fourth expansion valve 32 ; wherein the outdoor heat exchanger 31 has a front-end cooling fan to accelerate the heat exchange of the outdoor heat exchanger 31 .

[0079] The outdoor heat exchanger 31 is provided on the refrigerant circuit 1 , and the output port of the outdoor heat exchanger 31 can be connected to or blocked from the input port of the gas-liquid separator 13 . The fourth expansion valve 32 is provided on the input port of the outdoor heat exchanger 31 .

[0080] It is worth noting that the outdoor heat exchanger 31 can absorb heat from the air to heat the refrigerant flowing through it.

[0081] In some optional embodiments, the pipeline of the refrigerant circuit 1 starts from the output port of the compressor 12, passes through the water-cooled condenser 11, the fourth expansion valve 32, the outdoor heat exchanger 31 and the gas-liquid separator 13 in sequence, and is connected to the refrigerant input port of the compressor 12.

[0082] Furthermore, the passenger compartment heating circuit 2 has the front air conditioner heater 41 and the rear air conditioner heater 42 connected in series. Preferably, the second bypass thermal auxiliary assembly also includes two sets of second bypass pipes 63 and air conditioner evaporators 64, with the two sets of air conditioner evaporators 64 corresponding to the front air conditioner heater 41 and the rear air conditioner heater 42, respectively.

[0083] In some preferred embodiments, a first multi-way water valve 21 and a second water pump are provided in the passenger compartment heating circuit 2 pipeline. The first multi-way water valve 21 is used to transport the circulating water after passing through the front air-conditioning internal heater 41 and the rear air-conditioning internal heater 42 back to the water side of the water-cooled condenser 11 to continue the heating circulation, or to transport the circulating water after passing through the front air-conditioning internal heater 41 and the rear air-conditioning internal heater 42 to the heat exchanger 52 to enable heat exchange between the circulating water and the battery heating circuit 5.

[0084] Furthermore, the battery heating pipeline 51 is also provided with a second multi-way water valve 55 and a first water pump 54 , so that the cooling water in the battery heating pipeline 51 and the passenger compartment heating circuit 2 forms a loop.

[0085] In some specific embodiments, the battery heating circuit 5 includes:

[0086] A battery heating pipeline 51 is provided with a first water pump 54, and the battery heating pipeline 51 is passed through the battery 7. A heat exchanger 52 is provided on the battery heating pipeline 51, and two pipelines are provided in the heat exchanger 52, one of which is connected to the battery heating pipeline 51, and the other is connected to the passenger compartment heating circuit 2; a battery cooler 53 is provided on the battery heating pipeline 51, and a second bypass pipeline 63 is passed through the battery cooler 53.

[0087] It is understandable that a portion of the battery cooler 53 is passed through by the second bypass line 63 , and the second bypass line 63 can absorb the waste heat of the battery cooler 53 to heat the passenger compartment, thereby saving energy consumption.

[0088] In some specific embodiments, the outdoor heat exchange device 3 includes: an outdoor heat exchanger 31 and a fourth expansion valve 32; wherein,

[0089] The outdoor heat exchanger 31 is provided on the refrigerant circuit 1 , and the output port of the outdoor heat exchanger 31 can be connected to or blocked from the input port of the gas-liquid separator 13 . The fourth expansion valve 32 is provided on the input port of the outdoor heat exchanger 31 .

[0090] It is worth noting that the outdoor heat exchanger 31 can absorb heat from the air to heat the refrigerant flowing through it.

[0091] In some optional embodiments, the pipeline of the refrigerant circuit 1 starts from the output port of the compressor 12, passes through the water-cooled condenser 11, the fourth expansion valve 32, the outdoor heat exchanger 31 and the gas-liquid separator 13 in sequence, and is connected to the refrigerant input port of the compressor 12.

[0092] Furthermore, the passenger compartment heating circuit 2 includes a front air conditioner heater 41 and a rear air conditioner heater 42 connected in series. Each of the front and rear air conditioner heaters 41 and 42 corresponds to a fan. When the fan blows air through the front and rear air conditioner heaters 41 and 42, the air is heated, creating warm air. Preferably, the second bypass heat assist assembly also includes two sets of second bypass pipes 63 and air conditioner evaporators 64, with the two sets of air conditioner evaporators 64 corresponding to the front and rear air conditioner heaters 41 and 42, respectively.

[0093] In some preferred embodiments, a first multi-way water valve 21 and a second water pump are provided in the passenger compartment heating circuit 2 pipeline. The first multi-way water valve 21 is used to transport the circulating water after passing through the front air-conditioning internal heater 41 and the rear air-conditioning internal heater 42 back to the water side of the water-cooled condenser 11 to continue the heating circulation, or to transport the circulating water after passing through the front air-conditioning internal heater 41 and the rear air-conditioning internal heater 42 to the heat exchanger 52 to enable heat exchange between the circulating water and the battery heating circuit 5.

[0094] Furthermore, the battery heating pipeline 51 is also provided with a second multi-way water valve 55 and a first water pump 54 , so that the cooling water in the battery heating pipeline 51 and the passenger compartment heating circuit 2 forms a loop.

[0095] The above has explained the detailed structure of the architecture, and the corresponding control method is introduced below.

[0096] Since the battery itself will generate a certain amount of heat during the use of the vehicle, and there will also be a certain amount of heat from the outside world, whether the heating of the passenger compartment is turned on has a key impact on the heat required for battery thermal management. In addition, the external ambient temperature is also an important consideration affecting the need for heating the passenger compartment. Therefore, how to comprehensively consider the above factors and design a control method that does not have PTC heating in the thermal management system of the electric vehicle is a difficulty that needs to be solved. Therefore, a thermal management control method for electric vehicles is proposed.

[0097] Secondly, refer to the attached Figure 6 , an embodiment of the present application provides a thermal management control method for an electric vehicle, comprising:

[0098] Step 100: The thermal management controller determines a thermal management request for the vehicle based on heating requests for the battery and the passenger compartment, as well as the current ambient temperature.

[0099] Step 101: The thermal management controller determines a target heating circuit and corresponding components in a heat source circuit based on a thermal management request; the heat source circuit includes an air conditioning heat pump circuit, a first bypass auxiliary heating component, a second bypass auxiliary heating component, and a third bypass auxiliary heating component; the target heating circuit includes a passenger compartment heating circuit 2 and a battery heating circuit 5;

[0100] Step 102: The thermal management controller controls corresponding components of the heat source circuit to perform heat exchange with the target heating circuit.

[0101] By determining the vehicle's thermal management request based on the heating requests for the battery and passenger compartment, as well as the current ambient temperature, different demands for heating the battery and passenger compartment at different ambient temperatures are divided. Different heat source circuits can also be changed and matched according to different demands to avoid the situation where a single fixed heat source produces too much or too little heat when responding to different demands. Different working modes can be used at different ambient temperatures to meet the heating of the passenger compartment and battery, which can eliminate PTC, reduce energy consumption, reduce costs, and increase cruising range.

[0102] In one embodiment, a clear thermal management request needs to be formed to determine how to consider the above factors. The following describes in detail how to obtain the thermal management request:

[0103] Step 100 specifically includes the following steps:

[0104] 10001. If the current ambient temperature is greater than a first preset value and a passenger compartment heating request is received, outputting thermal management request 1. When outputting thermal management request 1, the heat source circuit includes an air conditioning heat pump circuit, and the target heating circuit includes passenger compartment heating circuit 2. Controlling corresponding components of the heat source circuit to perform heat exchange with the target heating circuit includes the following steps:

[0105] Run the compressor 12 in the air-conditioning heat pump circuit, and turn on the fourth expansion valve 32 and the front-end cooling fan of the outdoor heat exchanger 31 to absorb heat from the external air; run the second water pump of the passenger compartment heating circuit 2 and the fan of the air-conditioning heater device 4, and control the opening angle of the first multi-way water valve 21 to exchange the generated heat with the passenger compartment heating circuit 2.

[0106] This step corresponds to the first working condition: when the outside temperature is above -10°C, the outdoor heat exchange device 3 and the heat pump device are used to provide heat to the passenger compartment. Figure 2 As shown, in the refrigerant circuit: the high-temperature and high-pressure refrigerant coming out of the compressor 12 enters the water-cooled condenser 11, and the water-cooled condenser 11 releases the heat of the refrigerant and then enters the outdoor heat exchanger 31 after throttling through the fourth expansion valve 32. The outdoor heat exchanger 31 absorbs heat from the air, and then enters the compressor after separation through the gas-liquid separator 13; the hot water after absorbing the heat from the refrigerant side of the water side of the water-cooled condenser 11 flows through the front air-conditioning internal heater 41 and the rear air-conditioning internal heater 42, and then passes through the first multi-way water valve 21 and returns to the water-cooled condenser 11 through the water pump; the cold air in the passenger compartment is heated after passing through the front and rear air-conditioning box heaters, thereby realizing the function of heating the passenger compartment.

[0107] 10002. If the current ambient temperature is less than a first preset value and within a first preset range, and a passenger compartment heating request is received, determining whether the battery requires cooling; if cooling is not required, outputting thermal management request 2; if cooling is required, outputting thermal management request 3;

[0108] 1000201. When a second thermal management request is output, the heat source circuit includes the air conditioning heat pump circuit and the first bypass auxiliary heating component, and the target heating circuit includes the passenger compartment heating circuit 2;

[0109] Controlling the corresponding components of the heat source circuit to perform heat exchange with the target heating circuit includes the following steps:

[0110] Run the first bypass auxiliary heating component and the compressor 12 in the air conditioning heat pump circuit, open the fourth expansion valve 32, and turn off the front-end cooling fan of the outdoor heat exchanger 31 to store heat;

[0111] After heat storage is completed, the second water pump of the passenger compartment heating circuit 2 and the fan of the air conditioning heater device 4 are operated, and the opening angle of the first multi-way water valve 21 is controlled to exchange the generated heat with the passenger compartment heating circuit 2.

[0112] For the third working condition, when the outside temperature is between -30℃ and -10℃, the heating scheme for the passenger compartment is: use a heat pump system with a bypass circuit to provide heat to the passenger compartment, such as Figure 2 As shown, the refrigerant circuit: the high-temperature and high-pressure refrigerant coming out of the compressor 12 passes through the first bypass pipe 61 to return to the gas-liquid separator 13, and enters the water-cooled condenser 11 in the other way. The water-cooled condenser 11 releases the heat of the refrigerant and passes through the fourth expansion valve 32, then passes through the outdoor heat exchanger 31, and then passes through the first control valve 66. After passing through the first control valve 66, it is separated by the gas-liquid separator 13 and enters the compressor 12; the hot water after the water side of the water-cooled condenser 11 absorbs the heat from the refrigerant side flows through the front air-conditioning internal heater 41 and the rear air-conditioning internal heater 42, and then passes through the first multi-way water valve 21 and returns to the water-cooled condenser 11 through the water pump, realizing the function of heating the passenger compartment.

[0113] 1000202. When a third thermal management request is output, the heat source circuit includes the air conditioning heat pump circuit, the first bypass auxiliary heating component, and the third bypass auxiliary heating component, and the target heating circuit includes the passenger compartment heating circuit 2;

[0114] Controlling the corresponding components of the heat source circuit to perform heat exchange with the target heating circuit includes the following steps:

[0115] Close the fourth expansion valve 32 and the second expansion valve 65, open the first on-off valve 91 and the third expansion valve 81, then operate the compressor 12 and the first bypass auxiliary heat component in the air conditioning heat pump circuit, and use the third bypass auxiliary heat component to absorb heat from the battery for heat storage;

[0116] After heat storage is completed, the second water pump in the passenger compartment heating circuit 2 and the fan of the air conditioning heater device 4 are operated, and the opening angle of the first multi-way water valve 21 is controlled to exchange the generated heat with the passenger compartment heating circuit 2.

[0117] For the second working condition: the outside temperature is between -30℃ and -10℃, the heating solution for the passenger compartment is to use a heat pump device with a bypass circuit to provide heat to the passenger compartment, such as Figure 3 As shown, in the refrigerant circuit: the high-temperature and high-pressure refrigerant coming out of the compressor 12 passes through the first bypass line 61 and the first expansion valve 62 to return to the gas-liquid separator 13, and enters the water-cooled condenser 11 in the other way. After the water-cooled condenser 11, it passes through the first switch valve 91 and then the third bypass line 8 and the third expansion valve 81. After being regulated by the third expansion valve 81, it passes through the battery cooler 53 and then is separated by the gas-liquid separator 13 before entering the compressor; the hot water after the water side of the water-cooled condenser 11 absorbs the heat from the refrigerant side flows through the front air-conditioning heater 41 and the rear air-conditioning heater 42, and then passes through the first multi-way water valve 21 and returns to the water-cooled condenser 11 through the water pump, thereby realizing the function of heating the passenger compartment.

[0118] 10003. If the current ambient temperature is within the second preset range and a battery heating request is received, outputting a thermal management request four;

[0119] When a thermal management request 4 is output, the heat source circuit includes the air conditioning heat pump circuit, the first bypass auxiliary heating component and the second bypass auxiliary heating component, and the target heating circuit includes the battery heating circuit 5;

[0120] Controlling the corresponding components of the heat source circuit to perform heat exchange with the target heating circuit includes the following steps:

[0121] Close the fourth expansion valve 32 and the third expansion valve 81, open the first on-off valve 91 and the second expansion valve 65, then operate the compressor 12 and the first bypass auxiliary heating component in the air conditioning heat pump circuit, and use the second bypass auxiliary heating component to heat the warm air core of the air conditioning heater device 4, and turn off the fan of the air conditioning heater device 4 to store heat;

[0122] After heat storage is completed, the second water pump in the passenger compartment heating circuit 2 and the first water pump 54 in the battery heating circuit 5 are operated, and the opening angles of the first multi-way water valve 21 and the second multi-way water valve 55 are controlled to transfer the generated heat through the passenger compartment heating circuit 2 to the battery heating circuit 5 for heat exchange.

[0123] Corresponding to the fourth operating condition, the outside temperature is -30℃~-0℃, the battery heating solution includes using a heat pump system with a bypass circuit to provide heat to the battery; Figure 4As shown, the refrigerant circuit: the high-temperature and high-pressure refrigerant from the compressor 12 passes through the bypass circuit, the first expansion valve 62, and returns to the gas-liquid separator 13. The other path enters the water-cooled condenser 11. The water-cooled condenser 11 releases the heat of the refrigerant and then passes through the first on-off valve 91. Then, it passes through the second expansion valve 65, is regulated by the second expansion valve 65, passes through the air-conditioning evaporator 64, and finally is separated by the gas-liquid separator 13 before entering the compressor 12. The hot water on the water side of the water-cooled condenser 11 absorbs the heat from the refrigerant and flows through the front air-conditioning internal heater 41 and the rear air-conditioning internal heater 42 (the air-conditioning fan is not turned on), then passes through the heat exchanger 52, enters the first multi-way water valve 21, and returns to the water-cooled condenser 11 through the water pump. In the battery circuit, the water pump transports the battery circuit water to the heat exchanger 52. The hot water on the air-conditioning side of the heat exchanger 52 heats the water in the battery 7 circuit and passes through the battery 7. Then, the circuit is regulated by the second multi-way water valve 55, and then the circuit is completed by the water pump.

[0124] 10004. If the current ambient temperature is within the second preset range and a battery heating request and a passenger compartment heating request are received, outputting a thermal management request five;

[0125] When a thermal management request 5 is output, the heat source circuit includes the air conditioning heat pump circuit, the first bypass auxiliary heating component, and the second bypass auxiliary heating component, and the target heating circuit includes the passenger compartment heating circuit 2 and the battery heating circuit 5;

[0126] Controlling the corresponding components of the heat source circuit to perform heat exchange with the target heating circuit includes the following steps:

[0127] Close the fourth expansion valve 32 and the third expansion valve 81, open the first on-off valve 91 and the second expansion valve 65, then operate the compressor 12 and the first bypass auxiliary heating component in the air conditioning heat pump circuit, and use the second bypass auxiliary heating component to heat the warm air core of the air conditioning heater device 4, and turn off the fan of the air conditioning heater device 4 to store heat;

[0128] After heat storage is completed, the fan of the air-conditioning heater device 4 is turned on, the second water pump in the passenger compartment heating circuit 2 and the first water pump 54 in the battery heating circuit 5 are operated, and the opening angles of the first multi-way water valve 21 and the second multi-way water valve 55 are controlled to exchange the generated heat with the passenger compartment heating circuit 2 and the battery heating circuit 5.

[0129] The corresponding fifth working condition is different from the fourth working condition in that after the heat storage is completed, the fan of the air-conditioning heater device 4 is turned on to send warm air into the car.

[0130] Furthermore, considering that the outdoor equipment is in a parked state and there is no wind, heat will escape from the outdoor heat exchanger. To utilize this energy, the vehicle's thermal management request is determined based on the heating requirements of the battery and passenger compartment and the current ambient temperature, further including the following steps:

[0131] If the current ambient temperature is within the second preset range and a battery heating request and a passenger compartment heating request are received, it is determined whether the vehicle is in a parked state; if the vehicle is not in a parked state, a thermal management request five is output; if the vehicle is in a parked state, a thermal management request six is ​​output; the heat source circuit corresponding to thermal management request six includes the air conditioning heat pump circuit and the first bypass auxiliary heating component; and the target heating circuits include passenger compartment heating circuit 2 and battery heating circuit 5;

[0132] Controlling the corresponding components of the heat source circuit to perform heat exchange with the target heating circuit also includes the following steps:

[0133] Open the fourth expansion valve 32, turn off the front-end cooling fan of the outdoor heat exchanger 31, run the first bypass auxiliary heating component and the compressor 12 in the air conditioning heat pump circuit, and then open the fourth expansion valve 32, turn off the front-end cooling fan of the outdoor heat exchanger 31, and turn off the fan of the air conditioning heater device 4 to store heat;

[0134] After heat storage is completed, the fan of the air-conditioning heater device 4 is turned on, the second water pump in the passenger compartment heating circuit 2 and the first water pump 54 in the battery heating circuit 5 are operated, and the opening angles of the first multi-way water valve 21 and the second multi-way water valve 55 are controlled to exchange the generated heat with the passenger compartment heating circuit 2 and the battery heating circuit 5.

[0135] Correspondingly, under the sixth working condition, the outside temperature is -30℃~-0℃, and the solution for heating the passenger compartment and the battery at the same time is: use a heat pump system with a bypass circuit to provide heat to the battery and the passenger compartment; Figure 5 As shown, the refrigerant circuit: the high-temperature and high-pressure refrigerant from the compressor 12 passes through the bypass circuit, the first expansion valve 62, and returns to the gas-liquid separator 13. The other path enters the water-cooled condenser 11. The water-cooled condenser 11 releases the heat of the refrigerant and then passes through the fourth expansion valve 32. After being regulated by the fourth expansion valve 32, it passes through the first control valve 66, and finally is separated by the gas-liquid separator 13 before entering the compressor; the hot water on the water side of the water-cooled condenser 11 absorbs the heat from the refrigerant side and flows through the front air-conditioning heater 41 and the rear air-conditioning heater 42 to heat the passenger compartment, then passes through the heat exchanger 52, passes through the first multi-way water valve 21, and returns to the water-cooled condenser 11 through the water pump; in the battery circuit, the water pump transports the battery circuit water to the heat exchanger 52. The hot water on the air-conditioning side of the heat exchanger 52 heats the water in the battery 7 circuit and then passes through the battery 7, then passes through the second multi-way water valve 55 to regulate the circuit, and then completes the circuit through the water pump.

[0136] Of course, for the parking state, there is also a seventh working condition, that is, only heating the battery. Under the fifth working condition, the outside temperature is -30℃~-0℃. The battery heating solution uses a heat pump system with a bypass circuit to provide heat to the battery. Figure 5As shown, the refrigerant circuit: the high-temperature and high-pressure refrigerant from the compressor 12 passes through the bypass circuit, the first expansion valve 62 and returns to the gas-liquid separator 13, and the other way enters the water-cooled condenser 11. The water-cooled condenser 11 releases the heat of the refrigerant and then passes through the fourth expansion valve 32. After being regulated by the fourth expansion valve 32, it passes through the first control valve 66, and finally passes through the gas-liquid separator 13 for separation before entering the compressor; the hot water on the water side of the water-cooled condenser 11 absorbs the heat from the refrigerant side and flows through the front air-conditioning heater 41 and the rear air-conditioning heater 42 (the air-conditioning fan is not turned on), then passes through the heat exchanger 52, passes through the first multi-way water valve 21, and returns to the water-cooled condenser 11 through the water pump; in the battery circuit, the water pump transports the battery circuit water to the heat exchanger 52. The hot water on the air-conditioning side of the heat exchanger 52 heats the water in the battery 7 circuit and then passes through the battery 7, then passes through the second multi-way water valve 55 to regulate the circuit, and then forms a circuit through the water pump.

[0137] In summary, the thermal management system of the present application can adopt different working modes to meet the heating of the passenger compartment and battery heating at different ambient temperatures by coordinating the arrangement of common pipelines and heat exchange equipment between independent thermal management circuits, thereby eliminating PTC, reducing energy consumption, reducing costs, and increasing cruising range.

[0138] In a third aspect, a vehicle is provided, comprising: a thermal management controller, an air conditioning heat pump circuit, a first bypass auxiliary heating component, a second bypass auxiliary heating component, a third bypass auxiliary heating component, a passenger compartment heating circuit 2 and a battery heating circuit 5 , and a memory connection; the memory is configured to store one or more programs;

[0139] The one or more programs are executed by the thermal management controller to implement the thermal management control method for an electric vehicle. The thermal management system of an electric vehicle may include a processor, a memory, a communication interface, and a communication bus.

[0140] The communication bus may be of any type and is used to interconnect the processor, memory, and communication interface.

[0141] Communication interfaces include input / output (I / O) interfaces, physical interfaces, and logical interfaces, used to interconnect components within the thermal management control device of an electric vehicle, as well as interfaces used to interconnect the thermal management control device of an electric vehicle with other devices (such as other computing devices or user devices). Physical interfaces can include Ethernet interfaces, fiber optic interfaces, ATM interfaces, etc. User devices can include display screens (displays), keyboards, etc.

[0142] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical memory, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0143] The processor may be a general-purpose processor that can call the thermal management control program for an electric vehicle stored in a memory and execute the thermal management control method for an electric vehicle provided in an embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the thermal management control program for an electric vehicle is called may refer to the various embodiments of the thermal management control method for an electric vehicle of the present application, and will not be described in detail here.

[0144] In a fourth aspect, an embodiment of the present application also provides a computer-readable storage medium.

[0145] The computer-readable storage medium of the present application stores a thermal management control program for an electric vehicle, wherein when the thermal management control program for the electric vehicle is executed by a processor, the steps of the thermal management control method for the electric vehicle as described above are implemented.

[0146] Among them, the method implemented when the thermal management control program of the electric vehicle is executed can refer to the various embodiments of the thermal management control method of the electric vehicle of the present application, and will not be repeated here.

[0147] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0148] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings 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 includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit the "first", "second" and "third" to different types.

[0149] In the description of the embodiments of this application, the words "exemplary," "for example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "for example," or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "for example," or "for example" is intended to present the relevant concepts in a concrete manner.

[0150] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0151] In some processes described in the embodiments of the present application, multiple operations or steps are included that appear in a specific order. However, it should be understood that these operations or steps may not be performed in the order in which they appear in the embodiments of the present application or may be performed in parallel. The sequence numbers of the operations are only used to distinguish between different operations, and the sequence numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations or steps may be performed in sequence or in parallel, and these operations or steps may be combined.

[0152] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device to execute the methods described in each embodiment of the present application.

[0153] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A thermal management control method for an electric vehicle, characterized in that: It includes: Determining a thermal management request for the vehicle based on heating requests for the battery and passenger compartment, as well as the current ambient temperature; this step specifically includes: if the current ambient temperature is greater than a first preset value and a passenger compartment heating request is received, outputting a first thermal management request; if the current ambient temperature is less than the first preset value and within a first preset range, and a passenger compartment heating request is received, determining whether the battery requires cooling; if cooling is not required, outputting a second thermal management request; if cooling is required, outputting a third thermal management request; if the current ambient temperature is within a second preset range and a battery heating request is received, outputting a fourth thermal management request; if the current ambient temperature is within the second preset range and both a battery heating request and a passenger compartment heating request are received, outputting a fifth thermal management request; Determine the target heating circuit and the corresponding components in the heat source circuit according to the thermal management request; the heat source circuit includes an air conditioning heat pump circuit, a first bypass auxiliary heating component, a second bypass auxiliary heating component and a third bypass auxiliary heating component; the target heating circuit includes a passenger compartment heating circuit (2) and a battery heating circuit (5); this step specifically includes: when outputting thermal management request one, the heat source circuit includes the air conditioning heat pump circuit, and the target heating circuit includes the passenger compartment heating circuit (2); when outputting thermal management request two, the heat source circuit includes the air conditioning heat pump circuit and the first bypass auxiliary heating component, and the target heating circuit includes the passenger compartment heating circuit circuit (2); when the output thermal management request is three, the heat source circuit includes the air conditioning heat pump circuit, the first bypass auxiliary heating component and the third bypass auxiliary heating component, and the target heating circuit includes the passenger compartment heating circuit (2); when the output thermal management request is four, the heat source circuit includes the air conditioning heat pump circuit, the first bypass auxiliary heating component and the second bypass auxiliary heating component, and the target heating circuit includes the battery heating circuit (5); when the output thermal management request is five, the heat source circuit includes the air conditioning heat pump circuit, the first bypass auxiliary heating component and the second bypass auxiliary heating component, and the target heating circuit includes the passenger compartment heating circuit (2) and the battery heating circuit (5); The corresponding components of the heat source circuit are controlled to perform heat exchange with the target heating circuit.

2. The thermal management control method for an electric vehicle according to claim 1, wherein: When a heat management request is output, the corresponding components of the heat source circuit are controlled to perform heat exchange with the target heating circuit, including the following steps: The compressor (12) in the air conditioning heat pump circuit is operated, and the fourth expansion valve (32) and the front-end cooling fan of the outdoor heat exchanger (31) are turned on to absorb heat from the external air; the second water pump of the passenger compartment heating circuit (2) and the fan of the air conditioning heater device (4) are operated, and the opening angle of the first multi-way water valve (21) is controlled to heat exchange the generated heat with the passenger compartment heating circuit (2).

3. The thermal management control method for an electric vehicle according to claim 1, wherein: When the second thermal management request is output, controlling the corresponding components of the heat source circuit to perform heat exchange with the target heating circuit includes the following steps: Running the first bypass auxiliary heating component and the compressor (12) in the air conditioning heat pump circuit, opening the fourth expansion valve (32), and closing the front-end cooling fan of the outdoor heat exchanger (31) to store heat; After heat storage is completed, the second water pump of the passenger compartment heating circuit (2) and the fan of the air conditioning heater device (4) are operated, and the opening angle of the first multi-way water valve (21) is controlled to exchange the generated heat with the passenger compartment heating circuit (2).

4. The thermal management control method for an electric vehicle according to claim 1, wherein: When a third thermal management request is output, controlling corresponding components of the heat source circuit to perform heat exchange with the target heating circuit includes the following steps: The fourth expansion valve (32) and the second expansion valve (65) are closed, the first switch valve (91) and the third expansion valve (81) are opened, and then the compressor (12) and the first bypass auxiliary heat component in the air-conditioning heat pump circuit are operated, and the third bypass auxiliary heat component is used to absorb heat from the battery for heat storage; After heat storage is completed, the second water pump in the passenger compartment heating circuit (2) and the fan of the air conditioning heater device (4) are operated, and the opening angle of the first multi-way water valve (21) is controlled to exchange the generated heat with the passenger compartment heating circuit (2).

5. The thermal management control method for an electric vehicle according to claim 1, wherein: When a heat management request 4 is output, controlling corresponding components of the heat source circuit to perform heat exchange with the target heating circuit includes the following steps: The fourth expansion valve (32) and the third expansion valve (81) are closed, the first on-off valve (91) and the second expansion valve (65) are opened, and then the compressor (12) and the first bypass auxiliary heating component in the air-conditioning heat pump circuit are operated, and the second bypass auxiliary heating component is used to heat the warm air core of the air-conditioning heater device (4), and the fan of the air-conditioning heater device (4) is closed to store heat; After heat storage is completed, the second water pump in the passenger compartment heating circuit (2) and the first water pump (54) in the battery heating circuit (5) are operated, and the opening angles of the first multi-way water valve (21) and the second multi-way water valve (55) are controlled to transfer the generated heat through the passenger compartment heating circuit (2) to the battery heating circuit (5) for heat exchange.

6. The thermal management control method for an electric vehicle according to claim 1, wherein: When the heat management request five is output, the corresponding components of the heat source circuit are controlled to perform heat exchange with the target heating circuit, including the following steps: The fourth expansion valve (32) and the third expansion valve (81) are closed, the first on-off valve (91) and the second expansion valve (65) are opened, and then the compressor (12) and the first bypass auxiliary heating component in the air-conditioning heat pump circuit are operated, and the second bypass auxiliary heating component is used to heat the warm air core of the air-conditioning heater device (4), and the fan of the air-conditioning heater device (4) is closed to store heat; After heat storage is completed, the fan of the air-conditioning heater device (4) is turned on, the second water pump in the passenger compartment heating circuit (2) and the first water pump (54) in the battery heating circuit (5) are operated, and the opening angles of the first multi-way water valve (21) and the second multi-way water valve (55) are controlled to exchange the generated heat with the passenger compartment heating circuit (2) and the battery heating circuit (5).

7. The thermal management control method for an electric vehicle according to claim 1, wherein: Determining a vehicle thermal management request based on a battery and passenger compartment heating request and a current ambient temperature also includes the following steps: If the current ambient temperature is within the second preset range and a battery heating request and a passenger compartment heating request are received, it is determined whether the vehicle is in a parked state; if the vehicle is not in a parked state, a thermal management request five is output; if the vehicle is in a parked state, a thermal management request six is ​​output; the heat source circuit corresponding to the thermal management request six includes an air conditioning heat pump circuit and a first bypass auxiliary heating component; the target heating circuit includes a passenger compartment heating circuit (2) and a battery heating circuit (5); Controlling the corresponding components of the heat source circuit to perform heat exchange with the target heating circuit also includes the following steps: The fourth expansion valve (32) is opened, the front cooling fan of the outdoor heat exchanger (31) is closed, the compressor (12) in the first bypass auxiliary heat component and the air conditioning heat pump circuit is operated, and the fourth expansion valve (32) is opened, the front cooling fan of the outdoor heat exchanger (31) is closed, and the fan of the air conditioning heater device (4) is closed to store heat; after the heat storage is completed, the fan of the air conditioning heater device (4) is opened, the second water pump in the passenger compartment heating circuit (2) and the first water pump (54) in the battery heating circuit (5) are operated, and the opening angles of the first multi-way water valve (21) and the second multi-way water valve (55) are controlled to exchange the generated heat with the passenger compartment heating circuit (2) and the battery heating circuit (5).

8. A thermal management system for an electric vehicle, characterized in that: It includes: a thermal management controller connected to an air conditioning heat pump circuit, a first bypass auxiliary heating component, a second bypass auxiliary heating component, a third bypass auxiliary heating component, a passenger compartment heating circuit (2), and a battery heating circuit (5); The thermal management controller is configured to determine a thermal management request for the vehicle based on heating requests for the battery and passenger compartment, and a current ambient temperature; determine a target heating circuit and corresponding components in a heat source circuit based on the thermal management request; and control corresponding components of the heat source circuit to perform heat exchange with the target heating circuit; Determining a thermal management request for the vehicle based on heating requests for the battery and passenger compartment, as well as the current ambient temperature, specifically includes: if the current ambient temperature is greater than a first preset value and a passenger compartment heating request is received, outputting a first thermal management request; if the current ambient temperature is less than the first preset value and within a first preset range, and a passenger compartment heating request is received, determining whether the battery requires cooling; if cooling is not required, outputting a second thermal management request; if cooling is required, outputting a third thermal management request; if the current ambient temperature is within a second preset range and a battery heating request is received, outputting a fourth thermal management request; if the current ambient temperature is within the second preset range and both a battery heating request and a passenger compartment heating request are received, outputting a fifth thermal management request; The target heating circuit and corresponding components in the heat source circuit are determined according to the thermal management request, specifically including: when the thermal management request one is output, the heat source circuit includes the air conditioning heat pump circuit, and the target heating circuit includes the passenger compartment heating circuit (2); when the thermal management request two is output, the heat source circuit includes the air conditioning heat pump circuit and the first bypass auxiliary heating component, and the target heating circuit includes the passenger compartment heating circuit (2); when the thermal management request three is output, the heat source circuit includes the air conditioning heat pump circuit, the first bypass auxiliary heating component and the third bypass auxiliary heating component, and the target heating circuit includes the passenger compartment heating circuit (2); when the thermal management request four is output, the heat source circuit includes the air conditioning heat pump circuit, the first bypass auxiliary heating component and the second bypass auxiliary heating component, and the target heating circuit includes the battery heating circuit (5); when the thermal management request five is output, the heat source circuit includes the air conditioning heat pump circuit, the first bypass auxiliary heating component and the second bypass auxiliary heating component, and the target heating circuit includes the passenger compartment heating circuit (2) and the battery heating circuit (5).

9. A vehicle, characterized in that: It includes: A thermal management controller, an air conditioning heat pump circuit, a first bypass auxiliary heating component, a second bypass auxiliary heating component, a third bypass auxiliary heating component, a passenger compartment heating circuit (2) and a battery heating circuit (5), and a memory connection; the memory is used to store one or more programs; The one or more programs are executed by the thermal management controller to implement the thermal management control method for an electric vehicle according to any one of claims 1 to 7.

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