A control method and control system for vehicle thermal management

Abstract

The application is suitable for the field of automobile technology, and provides a control method and system for vehicle thermal management and a vehicle.The method comprises the following steps: after detecting that the air conditioning heating function on the vehicle is turned on, the water temperature at the outlet of the driving motor of the vehicle is acquired; if the water temperature is less than a first threshold value, it is determined that the heating strategy of the vehicle is an air source heat pump heating strategy, a positive temperature coefficient heating strategy and a supplementary air and enthalpy increasing heating strategy; and the air conditioning system of the vehicle is controlled according to the air source heat pump heating strategy, the positive temperature coefficient heating strategy and the supplementary air and enthalpy increasing heating strategy, so as to improve the indoor temperature of the vehicle. Compared with the prior art which only improves the indoor temperature through the supplementary air and enthalpy increasing heating strategy, the method combines the air source heat pump heating strategy, the positive temperature coefficient heating strategy and the supplementary air and enthalpy increasing heating strategy to control the air conditioning system of the vehicle, thereby improving the heating capacity of the air conditioning system, improving the energy efficiency of the air conditioning system and reducing the energy consumption.

Description

Technical Field

[0001] This application belongs to the field of automotive technology, and in particular relates to a control method, control system and vehicle for vehicle thermal management. Background Technology

[0002] Currently, electric vehicles primarily use air conditioning systems for heating. When the air conditioning system is used for heating in low-temperature environments, its heat dissipation is extremely rapid, resulting in insufficient heating capacity. Therefore, it is necessary to increase the energy consumption of the air conditioning system to improve heating capacity. However, increasing the energy consumption of the air conditioning system leads to a decrease in the driving range of electric vehicles.

[0003] Existing technologies typically only add a gas replenishment and enthalpy-increasing circuit to the air conditioning system to replenish the compressor, thereby increasing the heating capacity and raising the vehicle's interior temperature. This approach is not comprehensive enough, reduces the energy efficiency of the air conditioning system, and increases energy consumption. Summary of the Invention

[0004] This application provides a vehicle thermal management control method, control system, and vehicle, which can improve the heating capacity of the air conditioning system, improve the energy efficiency of the air conditioning system, and reduce energy consumption.

[0005] In a first aspect, embodiments of this application provide a control method for vehicle thermal management, including:

[0006] When the vehicle's air conditioning heating function is detected to be turned on, the water temperature at the outlet of the vehicle's drive motor is obtained.

[0007] If the water temperature is less than a first threshold, the vehicle's heating strategy is determined to be an air source heat pump heating strategy, a positive temperature coefficient heating strategy, and a gas-injection enthalpy-increasing heating strategy. The air source heat pump heating strategy is a thermal management strategy that uses air as a heat source and is used to control the vehicle's air conditioning system. The positive temperature coefficient heating strategy is a thermal management strategy that uses heating components as a heat source and is used to control the vehicle's air conditioning system. The gas-injection enthalpy-increasing heating strategy is a thermal management strategy that controls the compressor of the air conditioning system to increase the heating capacity of the air conditioning system.

[0008] The vehicle's air conditioning system is controlled according to the air source heat pump heating strategy, the positive temperature coefficient heating strategy, and the gas replenishment enthalpy heating strategy to increase the vehicle's interior temperature.

[0009] Optionally, before controlling the vehicle's air conditioning system according to the air source heat pump heating strategy, the positive temperature coefficient heating strategy, and the gas injection enthalpy-increasing heating strategy, the method further includes:

[0010] The battery system of the vehicle is shut down, and the self-circulation mode of the drive motor system is activated.

[0011] Optionally, after controlling the vehicle's air conditioning system according to the air source heat pump heating strategy, the positive temperature coefficient heating strategy, and the gas-injection enthalpy-increasing heating strategy, the method further includes:

[0012] If the water temperature is greater than or equal to the first threshold and less than the second threshold, then the heating strategy of the vehicle is determined to be the positive temperature coefficient heating strategy and the drive motor waste heat heating strategy; the drive motor waste heat heating strategy is a thermal management strategy that uses the waste heat generated during the operation of the drive motor as a heat source and is used to control the air conditioning system of the vehicle.

[0013] The vehicle's air conditioning system is controlled according to the positive temperature coefficient heating strategy and the waste heat heating strategy of the drive motor to increase the vehicle's interior temperature.

[0014] Optionally, after controlling the vehicle's air conditioning system according to the positive temperature coefficient heating strategy and the drive motor waste heat heating strategy, the method further includes:

[0015] If the water temperature is greater than the second threshold, then the outside temperature of the vehicle is obtained;

[0016] If the outside temperature is greater than or equal to the third threshold, then the heating strategy of the vehicle is determined to be the positive temperature coefficient heating strategy and the air source heat pump heating strategy.

[0017] The air conditioning system is controlled according to the air source heat pump heating strategy and the positive temperature coefficient heating strategy to increase the interior temperature of the vehicle.

[0018] Optionally, after obtaining the outside temperature of the vehicle, the method further includes:

[0019] If the outside temperature is less than the third threshold, then the heating strategy of the vehicle is determined to be the positive temperature coefficient heating strategy and the waste heat heating strategy of the drive motor.

[0020] The air conditioning system is controlled according to the positive temperature coefficient heating strategy and the waste heat heating strategy of the drive motor to increase the interior temperature of the vehicle.

[0021] Secondly, embodiments of this application provide a control device for vehicle thermal management, comprising:

[0022] The first acquisition unit is used to acquire the water temperature at the outlet of the vehicle's drive motor after detecting that the air conditioning heating function on the vehicle is turned on.

[0023] The first determining unit is configured to determine, if the water temperature is less than a first threshold, the vehicle's heating strategy as an air source heat pump heating strategy, a positive temperature coefficient heating strategy, and a gas-injection enthalpy-increasing heating strategy; the air source heat pump heating strategy is a thermal management strategy that uses air as a heat source and controls the vehicle's air conditioning system; the positive temperature coefficient heating strategy is a thermal management strategy that uses heating components as a heat source and controls the vehicle's air conditioning system; and the gas-injection enthalpy-increasing heating strategy is a thermal management strategy that controls the compressor of the air conditioning system to increase the heating capacity of the air conditioning system.

[0024] The first control unit is used to control the vehicle's air conditioning system according to the air source heat pump heating strategy, the positive temperature coefficient heating strategy, and the gas replenishment enthalpy heating strategy, so as to increase the vehicle's interior temperature.

[0025] Thirdly, embodiments of this application provide a control system, including:

[0026] An on-board controller, connected to an air conditioning system, is used to execute the control method for vehicle thermal management as described in any one of the first aspects;

[0027] The air conditioning system is used to provide heat according to the vehicle's heating strategy determined by the vehicle controller.

[0028] Optionally, the air conditioning system includes: an air source heat pump heating module, a positive temperature coefficient heating module, a gas-injection enthalpy-increasing heating module, and a drive motor waste heat heating module;

[0029] The vehicle controller is also connected to the air source heat pump heating module, the positive temperature coefficient heating module, the gas replenishment enthalpy heating module, and the drive motor waste heat heating module. The vehicle controller is also used to send a first control signal to the air source heat pump heating module when it detects that the heating strategy is an air source heat pump heating strategy, send a second control signal to the positive temperature coefficient heating module when it detects that the heating strategy is a gas replenishment enthalpy heating strategy, send a third control signal to the gas replenishment enthalpy heating module when it detects that the heating strategy is a drive motor waste heat heating strategy, and send a fourth control signal to the drive motor waste heat heating module when it detects that the heating strategy is a drive motor waste heat heating strategy.

[0030] The air source heat pump heating module is used to provide heat when it receives the first control signal;

[0031] The positive temperature coefficient heating module is used to provide heat when it receives the second control signal;

[0032] The gas replenishment and enthalpy-increasing heating module is used to provide heat when it receives the third control signal;

[0033] The waste heat supply module of the drive motor is used to supply heat when the fourth control signal is received.

[0034] Optionally, the air source heat pump heating module includes: a compressor, a water-cooled condenser, a first intermediate heat exchanger, a second intermediate heat exchanger, a first electronic expansion valve, an outdoor heat exchanger, a first three-way valve, and a first shut-off valve; wherein the compressor, the first shut-off valve, the water-cooled condenser, the first intermediate heat exchanger, the second intermediate heat exchanger, the first electronic expansion valve, the outdoor heat exchanger, and the first three-way valve are connected end to end in sequence to form an air source heat pump heating circuit.

[0035] Optionally, the positive temperature coefficient heating module includes: a water-cooled condenser, a first water pump, a heating component, a warm air core, a four-way valve, and a first expansion tank; wherein the water-cooled condenser, the first water pump, the heating component, the warm air core, the four-way valve, and the first expansion tank are connected end to end in sequence to form a positive temperature coefficient heating circuit.

[0036] The optional gas-injection enthalpy-increasing heating module includes: a compressor, a water-cooled condenser, a first intermediate heat exchanger, a second electronic expansion valve, a cooler, a second intermediate heat exchanger, a first electronic expansion valve, an outdoor heat exchanger, a first three-way valve, and a first shut-off valve; wherein the compressor, the first shut-off valve, the water-cooled condenser, the first intermediate heat exchanger, the second electronic expansion valve, the cooler, the second intermediate heat exchanger, the first electronic expansion valve, the outdoor heat exchanger, and the first three-way valve are connected end to end in sequence to form a gas-injection enthalpy-increasing heating circuit.

[0037] Optionally, the waste heat supply module of the drive motor includes: a compressor, a water-cooled condenser, a first intermediate heat exchanger, a second intermediate heat exchanger, a second electronic expansion valve, a cooler, a first check valve, and a first shut-off valve; wherein the compressor, the first shut-off valve, the water-cooled condenser, the first intermediate heat exchanger, the second electronic expansion valve, the cooler, the second intermediate heat exchanger, the first check valve, and the first intermediate heat exchanger are connected end to end in sequence to form a waste heat supply circuit for the drive motor.

[0038] Fourthly, embodiments of this application provide an on-board controller, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the vehicle thermal management control method as described in any one of the first aspects above.

[0039] Fifthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the vehicle thermal management control method as described in any one of the first aspects above.

[0040] Sixthly, embodiments of this application provide a computer program product that, when run on an in-vehicle controller, enables the in-vehicle controller to execute the vehicle thermal management control method described in any of the first aspects above.

[0041] In a seventh aspect, embodiments of this application provide a vehicle including an on-board controller, the on-board controller being configured to perform a control method for vehicle thermal management as described in any of the first aspects.

[0042] The beneficial effects of the embodiments in this application compared with the prior art are:

[0043] This application provides a vehicle thermal management control method. When the vehicle's air conditioning heating function is detected to be activated, the water temperature at the outlet of the vehicle's drive motor is obtained. If the water temperature is less than a first threshold, the vehicle's heating strategy is determined to be an air-source heat pump heating strategy, a positive temperature coefficient heating strategy, and a gas-injection enthalpy-increasing heating strategy. The air-source heat pump heating strategy uses air as a heat source and is used to control the vehicle's air conditioning system. The positive temperature coefficient heating strategy uses a heating element as a heat source and is used to control the vehicle's air conditioning system. The gas-injection enthalpy-increasing heating strategy controls the air conditioning system's compressor to increase the system's heating capacity. Based on these strategies, the vehicle's air conditioning system is controlled to increase the vehicle's interior temperature. Compared with existing technologies that only use gas injection and enthalpy-increasing heating strategies to increase the temperature inside the vehicle, this method combines air source heat pump heating strategies, positive temperature coefficient heating strategies, and gas injection and enthalpy-increasing heating strategies to control the vehicle's air conditioning system, thereby increasing the heating capacity of the air conditioning system, improving the energy efficiency of the air conditioning system, and reducing energy consumption. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the structure of a control system provided in an embodiment of this application;

[0046] Figure 2 This is a schematic diagram of the structure of a control system provided in another embodiment of this application;

[0047] Figure 3 This is a schematic diagram of the specific structure of a vehicle air conditioning system provided in one embodiment of this application;

[0048] Figure 4 This is a flowchart illustrating the implementation of a vehicle thermal management control method according to an embodiment of this application;

[0049] Figure 5 This is a flowchart illustrating the implementation of a vehicle thermal management control method according to another embodiment of this application;

[0050] Figure 6 This is a flowchart illustrating the implementation of a vehicle thermal management control method according to another embodiment of this application;

[0051] Figure 7 This is a flowchart illustrating the implementation of a vehicle thermal management control method according to another embodiment of this application;

[0052] Figure 8 This is a schematic diagram of the structure of a vehicle thermal management control device provided in an embodiment of this application;

[0053] Figure 9 This is a schematic diagram of the structure of an on-board controller provided in one embodiment of this application. Detailed Implementation

[0054] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0055] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0056] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0057] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0058] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0059] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0060] It should be noted that in all embodiments of this application, the vehicle is a new energy vehicle.

[0061] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a control system provided in an embodiment of this application. Figure 1 As shown, the control system includes an on-board controller 10 and an air conditioning system 20 that is communicatively connected to the on-board controller 10. It should be noted that the communication connection can be either a wired or wireless communication connection.

[0062] The vehicle controller 10 is used to obtain the water temperature at the outlet of the vehicle's drive motor after detecting that the air conditioning heating function on the vehicle is turned on, and to determine the vehicle's heating strategy based on the water temperature.

[0063] In this embodiment, the vehicle's heating strategy includes: an air source heat pump heating strategy, a positive temperature coefficient heating strategy, a gas replenishment enthalpy-increasing heating strategy, and a drive motor waste heat heating strategy.

[0064] For details on how to determine the vehicle's heating strategy based on the water temperature at the outlet of the vehicle's drive motor, please refer to [link / reference needed]. Figure 4The description of the vehicle thermal management control method shown is omitted here.

[0065] After determining the vehicle's heating strategy, the vehicle controller 10 sends the heating strategy to the air conditioning system 20 through the communication network with the air conditioning system 20.

[0066] The air conditioning system 20 is used to provide heat according to the vehicle's heating strategy determined by the on-board controller 10.

[0067] In one embodiment of this application, please refer to Figure 2 Since the vehicle's heating strategy includes: air source heat pump heating strategy, positive temperature coefficient heating strategy, gas replenishment enthalpy increase heating strategy and drive motor waste heat heating strategy, the air conditioning system 20 may include: air source heat pump heating module 21, positive temperature coefficient heating module 22, gas replenishment enthalpy increase heating module 23 and drive motor waste heat heating module 24.

[0068] In this embodiment, the vehicle controller 10 is also connected to the air source heat pump heating module 21, the positive temperature coefficient heating module 22, the gas replenishment and enthalpy enhancement heating module 23, and the drive motor waste heat heating module 24. The vehicle controller 10 is also used to send a first control signal to the air source heat pump heating module 21 when the heating strategy is detected to be an air source heat pump heating strategy, send a second control signal to the positive temperature coefficient heating module 22 when the heating strategy is detected to be a positive temperature coefficient heating strategy, send a third control signal to the gas replenishment and enthalpy enhancement heating module 23 when the heating strategy is detected to be a gas replenishment and enthalpy enhancement heating strategy, and send a fourth control signal to the drive motor waste heat heating module 24 when the heating strategy is detected to be a drive motor waste heat heating strategy.

[0069] The air source heat pump heating module 21 is used to provide heating when a first control signal is received.

[0070] The positive temperature coefficient heating module 22 is used to provide heating when it receives a second control signal.

[0071] The gas replenishment and enthalpy-increasing heating module 23 is used to provide heating when a third control signal is received.

[0072] The waste heat supply module 24 of the drive motor is used to supply heat when a fourth control signal is received.

[0073] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of an air conditioning system in a vehicle according to an embodiment of this application.

[0074] like Figure 3As shown, the air source heat pump heating module 21 includes a compressor 100, a water-cooled condenser 101, a first intermediate heat exchanger 102, a second intermediate heat exchanger 103, a first electronic expansion valve 104, an outdoor heat exchanger 105, a first three-way valve 106, and a first shut-off valve 107. The compressor 100, the first shut-off valve 107, the water-cooled condenser 101, the first intermediate heat exchanger 102, the second intermediate heat exchanger 103, the first electronic expansion valve 104, the outdoor heat exchanger 105, and the first three-way valve 106 are connected sequentially to form an air source heat pump heating circuit.

[0075] In one embodiment of this application, please refer to [the relevant documentation]. Figure 3 To facilitate the connection between various components, the air source heat pump heating module 21 may also include a first tee fitting 108, a second tee fitting 109, a first four-way fitting 110, and a second four-way fitting 111.

[0076] Based on this, in this embodiment, the first end of the compressor 100 is connected to the first end of the first tee fitting 108, the second end of the compressor 100 is connected to the first end of the first interloop heat exchanger (IHX) 102, the second end of the first tee fitting 108 is connected to the first end of the first shut-off valve 107, the second end of the first interloop heat exchanger 102 is connected to the first end of the water-cooled condenser 101, the third end of the first interloop heat exchanger 102 is connected to the first end of the first four-way fitting 110, the fourth end of the first interloop heat exchanger 102 is connected to the first end of the second four-way fitting 111, and the second end of the first shut-off valve 107 is connected to the second end of the water-cooled condenser 101. The second end of the connecting pipe 110 is connected to the first end of the second intermediate heat exchanger 103. The second end of the second intermediate heat exchanger 103 is connected to the first end of the first electronic expansion valve 104. The second end of the first electronic expansion valve 104 is connected to the first end of the second three-way pipe fitting 109. The second end of the second three-way pipe fitting 109 is connected to the first end of the outdoor heat exchanger 105. The second end of the outdoor heat exchanger 105 is connected to the first inlet of the first three-way valve 106. The outlet of the first three-way valve 106 is connected to the second end of the second four-way pipe fitting 111.

[0077] In this embodiment, the compressor 100, water-cooled condenser 101, first intermediate heat exchanger 102, second intermediate heat exchanger 103, first electronic expansion valve 104, outdoor heat exchanger 105, first three-way valve 106, first shut-off valve 107, first three-way fitting 108, second three-way fitting 109, first four-way fitting 110, and second four-way fitting 111 constitute an air source heat pump heating circuit.

[0078] Please continue reading. Figure 3In one embodiment of this application, the positive temperature coefficient heating module 22 includes: a water-cooled condenser 101, a first water pump 112, a heating element 113, a warm air core 114, a four-way valve 115, and a first expansion tank 116. The water-cooled condenser 101, the first water pump 112, the heating element 113, the warm air core 114, the four-way valve 115, and the first expansion tank 116 are connected end-to-end to form a positive temperature coefficient heating circuit.

[0079] In another embodiment of this application, the positive temperature coefficient heating module 22 may further include: a fourth tee fitting 117.

[0080] Based on this, in this embodiment, the third end of the water-cooled condenser 101 is connected to the first end of the first water pump 112, the fourth end of the water-cooled condenser 101 is connected to the first end of the first expansion tank 116, the second end of the first water pump 112 is connected to the first end of the heating assembly 113, the second end of the heating assembly 113 is connected to the first end of the warm air core 114, the second end of the warm air core 114 is connected to the first inlet of the four-way valve 115, the first outlet of the four-way valve 115 is connected to the first end of the fourth three-way fitting 117, and the second end of the fourth three-way fitting 117 is connected to the second end of the first expansion tank 116.

[0081] In this embodiment, the water-cooled condenser 101, the first water pump 112, the heating component 113, the warm air core 114, the four-way valve 115, the first expansion tank 116, and the fourth three-way pipe fitting 117 constitute a positive temperature coefficient heating circuit.

[0082] Please continue reading. Figure 3 In another embodiment of this application, the gas replenishment and enthalpy-increasing heating module 23 includes: a compressor 100, a water-cooled condenser 101, a first intermediate heat exchanger 102, a second electronic expansion valve 118, a cooler 119, a second intermediate heat exchanger 103, a first electronic expansion valve 104, an outdoor heat exchanger 105, a first three-way valve 106, and a first shut-off valve 107. The compressor 100, the first shut-off valve 107, the water-cooled condenser 101, the first intermediate heat exchanger 102, the second electronic expansion valve 118, the cooler 119, the second intermediate heat exchanger 103, the first electronic expansion valve 104, the outdoor heat exchanger 105, and the first three-way valve 106 are connected sequentially to form a gas replenishment and enthalpy-increasing heating circuit.

[0083] In one embodiment of this application, the gas replenishment and enthalpy-increasing heating module 23 may further include: a second tee fitting 109, a first four-way fitting 110, a second four-way fitting 111, and a third tee fitting 120.

[0084] Based on this, in this embodiment, the first end of the compressor 100 is connected to the first end of the first tee fitting 108, the second end of the compressor 100 is connected to the first end of the first interloop heat exchanger (IHX) 102, the second end of the first tee fitting 108 is connected to the first end of the first shut-off valve 107, the second end of the first interloop heat exchanger 102 is connected to the first end of the water-cooled condenser 101, the third end of the first interloop heat exchanger 102 is connected to the first end of the first four-way fitting 110, the fourth end of the first interloop heat exchanger 102 is connected to the first end of the second four-way fitting 111, the second end of the first shut-off valve 107 is connected to the second end of the water-cooled condenser 101, the third end of the first four-way fitting 109 is connected to the first end of the second electronic expansion valve 118, and the second end of the second electronic expansion valve 118 is connected to... The first end of the cooler 119 is connected to the first end of the third tee fitting 120, the second end of the third tee fitting 120 is connected to the third end of the second intermediate heat exchanger 103, the second end of the second intermediate heat exchanger 103 is connected to the first end of the first electronic expansion valve 104, the second end of the first electronic expansion valve 104 is connected to the first end of the second tee fitting 109, the second end of the second tee fitting 109 is connected to the first end of the outdoor heat exchanger 105, the second end of the outdoor heat exchanger 105 is connected to the first inlet of the first tee valve 106, and the outlet of the first tee valve 106 is connected to the second end of the second four-way fitting 111.

[0085] In this embodiment, the compressor 100, water-cooled condenser 101, first intermediate heat exchanger 102, second electronic expansion valve 118, cooler 119, second intermediate heat exchanger 103, first electronic expansion valve 104, outdoor heat exchanger 105, first three-way valve 106, and first shut-off valve 107 constitute a gas replenishment and enthalpy-increasing heating circuit.

[0086] Please continue reading. Figure 3In another embodiment of this application, the waste heat supply module 23 for the drive motor includes: a compressor 100, a water-cooled condenser 101, a first intermediate heat exchanger 102, a second intermediate heat exchanger 103, a second electronic expansion valve 118, a cooler 119, a first check valve 121, and a first shut-off valve 107. The compressor 100, the first shut-off valve 107, the water-cooled condenser 101, the first intermediate heat exchanger 102, the second electronic expansion valve 118, the cooler 119, the second intermediate heat exchanger 103, the first check valve 121, and the first intermediate heat exchanger 102 are connected sequentially to form a waste heat supply circuit for the drive motor.

[0087] In another embodiment of this application, the waste heat heating module 23 of the drive motor may further include: a first tee fitting 108, a third tee fitting 120, a first four-way fitting 110 and a second four-way fitting 111.

[0088] Based on this, in this embodiment, the first end of the compressor 100 is connected to the first end of the first tee fitting 108, and the second end of the compressor 100 is connected to the first intermediate heat exchanger. The first end of the first heat exchanger (IHX) 102 is connected to the first end of the first tee fitting 108, the second end of the first shut-off valve 107 is connected to the first end of the first intermediate heat exchanger 102, the second end of the first intermediate heat exchanger 102 is connected to the first end of the water-cooled condenser 101, the third end of the first intermediate heat exchanger 102 is connected to the first end of the first four-way fitting 110, the second end of the first shut-off valve 107 is connected to the second end of the water-cooled condenser 101, the third end of the first four-way fitting 110 is connected to the first end of the second electronic expansion valve 118, the second end of the second electronic expansion valve 118 is connected to the first end of the cooler 119, the second end of the cooler 119 is connected to the first end of the third tee fitting 120, the second end of the third tee fitting 120 is connected to the third end of the second intermediate heat exchanger 103, the fourth end of the second intermediate heat exchanger 103 is connected to the first end of the first one-way valve 121, and the second end of the first one-way valve 121 is connected to the third end of the second four-way fitting 111.

[0089] In this embodiment, the compressor 100, water-cooled condenser 101, first intermediate heat exchanger 102, second intermediate heat exchanger 103, second electronic expansion valve 118, cooler 119, first one-way valve 121, first tee fitting 108, third tee fitting 120, first four-way fitting 110, second four-way fitting 111 and first shut-off valve 107 constitute the waste heat supply circuit for the drive motor.

[0090] Please continue reading. Figure 3In another embodiment of this application, the air conditioning system 20 may further include: a low-temperature radiator 122, an electric fan 123, a vehicle three-in-one unit 124 (including an on-board charger 1241 (OBC), an on-board power converter 1242 (DC / DC), and a vehicle high-voltage connection junction box 1243 (PDU)), a drive motor 125, a battery pack 126, an evaporator 127, a second water pump 128, a third water pump 129, a second three-way valve 130, a fifth three-way fitting 131, a sixth three-way fitting 132, a seventh three-way fitting 133, an eighth three-way fitting 134, a second shut-off valve 135, a third shut-off valve 136, a second one-way valve 137, a third one-way valve 138, a third electronic expansion valve 139, and a second expansion tank 140.

[0091] Specifically, the electronic fan 123 is located at the outdoor heat exchanger 105. The first end of the low-temperature radiator 122 is connected to the first end of the second expansion tank 140. The second end of the low-temperature radiator 122 is connected to the first outlet of the second three-way valve 130. The second end of the second expansion tank 140 is connected to the first end of the fifth three-way fitting 131. The second end of the fifth three-way fitting 131 is connected to the first end of the second water pump 128. The second outlet of the second three-way valve 130 is connected to the first end of the sixth three-way fitting 132. The inlet of 130 is connected to the first end of the drive motor 125. The second end of the drive motor 125 is connected to the first end of the vehicle three-in-one fitting 124. The second end of the vehicle three-in-one fitting 124 is connected to the second end of the second water pump 128. The third end of the fifth three-way fitting 131 is connected to the first end of the seventh three-way fitting 133. The second end of the seventh three-way fitting 133 is connected to the first end of the third water pump 129. The second end of the third water pump 129 is connected to the first end of the battery pack 126. The second end of the battery pack 126 is connected to the second one-way valve 1. The first end of 37 is connected to the second end of the second one-way valve 137 and the second end of the sixth three-way fitting 132. The third end of the sixth three-way fitting 132 is connected to the second inlet of the four-way valve 115. The third end of the seventh three-way fitting 133 is connected to the first end of the eighth three-way fitting 134. The second end of the eighth three-way fitting 134 is connected to the first end of the third one-way valve 138. The second end of the third one-way valve 138 is connected to the third end of the fourth three-way fitting 117. The third end of the eighth three-way fitting 134 is connected to the cooler 119. The third end is connected to the second outlet of the four-way valve 115 and the fourth end of the cooler 119. The fourth end of the first four-way fitting 109 is connected to the first end of the third electronic expansion valve 139. The second end of the third electronic expansion valve 104 is connected to the first end of the evaporator 127. The second end of the evaporator 127 is connected to the third end of the third three-way fitting 120. The third end of the first three-way fitting 106 is connected to the first end of the second shut-off valve 135. The second end of the second shut-off valve 135 is connected to the second inlet of the first three-way valve 106.

[0092] In some possible embodiments, any intermediate heat exchanger in the air conditioning system 100 can be replaced with a plate heat exchanger, and the heating component 11 can be a PTC thermistor.

[0093] Please see Figure 4 , Figure 4 This is a flowchart illustrating the implementation of a vehicle thermal management control method according to an embodiment of this application. In this embodiment, the vehicle thermal management control method is executed by an on-board controller.

[0094] like Figure 4 As shown, a vehicle thermal management control method provided in one embodiment of this application may include steps S101 to S103, which are detailed below:

[0095] In S101, when the air conditioning heating function on the vehicle is detected to be turned on, the water temperature at the outlet of the vehicle's drive motor is obtained.

[0096] In practical applications, when people in a vehicle need heating, they can trigger the air conditioning control button located in the vehicle.

[0097] In this embodiment of the application, after the vehicle controller detects that the air conditioning control button of the vehicle is triggered, it indicates that the air conditioning heating function of the vehicle has been turned on. At this time, the vehicle controller can obtain the water temperature at the outlet of the vehicle's drive motor.

[0098] It should be noted that when the vehicle controller detects that the air conditioning heating function in the vehicle has been turned on, it means that the vehicle is in the power-on state.

[0099] In one implementation of this application, the vehicle controller can wirelessly connect to the first temperature sensor located at the outlet of the drive motor to obtain the water temperature at the outlet of the drive motor in real time.

[0100] In this embodiment, after obtaining the water temperature, the vehicle controller can compare the water temperature with a first threshold. The first threshold can be set according to actual needs and is not limited here; for example, the first threshold can be set to -15 degrees Celsius.

[0101] In S102, if the water temperature is less than a first threshold, the vehicle's heating strategy is determined to be an air source heat pump heating strategy, a positive temperature coefficient heating strategy, and a gas-injection enthalpy-increasing heating strategy. The air source heat pump heating strategy is a thermal management strategy that uses air as a heat source and is used to control the vehicle's air conditioning system. The positive temperature coefficient heating strategy is a thermal management strategy that uses heating components as a heat source and is used to control the vehicle's air conditioning system. The gas-injection enthalpy-increasing heating strategy is a thermal management strategy that controls the compressor of the air conditioning system to increase the heating capacity of the air conditioning system.

[0102] In this embodiment of the application, when the vehicle controller detects that the water temperature at the outlet of the drive motor is less than the first threshold, it indicates that although the heat generated when the drive motor is working can increase the water temperature at its outlet, the water temperature at this time is still insufficient to achieve the purpose of using the waste heat (i.e., waste heat) generated by the drive motor to increase the vehicle's interior temperature. Therefore, the vehicle controller can determine that the vehicle's heating strategy is an air source heat pump heating strategy, a positive temperature coefficient heating strategy, and a gas replenishment enthalpy increase heating strategy.

[0103] It should be noted that the air source heat pump heating strategy is a thermal management strategy that uses air as a heat source to control the vehicle's air conditioning system.

[0104] Positive Temperature Coefficient (PTC) heating strategy is a thermal management strategy that uses heating components as a heat source to control the vehicle's air conditioning system.

[0105] The gas replenishment and enthalpy-increasing heating strategy is a thermal management strategy used to control the compressor of an air conditioning system in order to increase the heating capacity of the air conditioning system.

[0106] In S103, the vehicle's air conditioning system is controlled according to the air source heat pump heating strategy, the positive temperature coefficient heating strategy, and the gas replenishment enthalpy heating strategy to increase the vehicle's interior temperature.

[0107] It should be noted that the vehicle controller pre-stores the correspondence between the air source heat pump heating strategy and the first device in the vehicle's air conditioning system, pre-stores the correspondence between the positive temperature coefficient heating strategy and the second device in the vehicle's air conditioning system, and pre-stores the correspondence between the gas replenishment enthalpy heating strategy and the third device in the vehicle's air conditioning system.

[0108] For example, please refer to Figure 3The first component includes, but is not limited to: compressor 100, water-cooled condenser 101, first intermediate heat exchanger 102, second intermediate heat exchanger 103, first electronic expansion valve 104, outdoor heat exchanger 105, first three-way valve 106, first shut-off valve 107, first three-way fitting 108, second three-way fitting 109, first four-way fitting 110, and second four-way fitting 111.

[0109] Please continue reading. Figure 3 The second component includes, but is not limited to: a water-cooled condenser 101, a first water pump 112, a heating component 113, a warm air core 114, a four-way valve 115, a first expansion tank 116, and a fourth three-way fitting 117.

[0110] Please continue reading. Figure 3 The third component includes, but is not limited to: compressor 100, water-cooled condenser 101, first intermediate heat exchanger 102, second electronic expansion valve 118, cooler 119, second intermediate heat exchanger 103, first electronic expansion valve 104, outdoor heat exchanger 105, first three-way valve 106, and first shut-off valve 107. Specifically, compressor 100, first shut-off valve 107, water-cooled condenser 101, first intermediate heat exchanger 102, second electronic expansion valve 118, cooler 119, second intermediate heat exchanger 103, first electronic expansion valve 104, outdoor heat exchanger 105, first three-way valve 106, second three-way fitting 109, first four-way fitting 110, second four-way fitting 111, and third three-way fitting 120.

[0111] In this embodiment, after determining that the vehicle's heating strategy is an air source heat pump heating strategy, a positive temperature coefficient heating strategy, and a gas-injection enthalpy-increasing heating strategy, the vehicle controller can control the vehicle's air conditioning system according to the air source heat pump heating strategy, the positive temperature coefficient heating strategy, and the gas-injection enthalpy-increasing heating strategy to increase the vehicle's interior temperature.

[0112] Specifically, the vehicle controller can control the first device in the vehicle's air conditioning system corresponding to the air source heat pump heating strategy according to the air source heat pump heating strategy; control the third device in the vehicle's air conditioning system corresponding to the gas injection enthalpy increase heating strategy according to the gas injection enthalpy increase heating strategy; and control the second device in the vehicle's air conditioning system corresponding to the positive temperature coefficient heating strategy according to the positive temperature coefficient heating strategy.

[0113] In one embodiment of this application, taking the gas-injection enthalpy-increasing heating strategy as an example, the vehicle controller can specifically control the third device in the vehicle's air conditioning system according to the gas-injection enthalpy-increasing heating strategy according to the following steps, detailed below:

[0114] According to the gas replenishment and enthalpy-increasing heating strategy, the second electronic expansion valve, the cooler, and the second intermediate heat exchanger are controlled to open. The eighth connection passage of the second electronic expansion valve and the second intermediate heat exchanger is connected by the first four-way pipe fitting, and the ninth connection passage of the cooler and the second intermediate heat exchanger is connected by the third three-way pipe fitting.

[0115] In this embodiment, the vehicle controller can control the opening of the second electronic expansion valve, the cooler and the second intermediate heat exchanger according to the gas replenishment and enthalpy increase heating strategy. The eighth connection passage of the second electronic expansion valve and the second intermediate heat exchanger is connected by the first four-way pipe fitting, and the ninth connection passage of the cooler and the second intermediate heat exchanger is connected by the third three-way pipe fitting.

[0116] As can be seen from the above, the vehicle thermal management control method provided in this application obtains the water temperature at the outlet of the vehicle's drive motor after detecting that the vehicle's air conditioning heating function is turned on. If the water temperature is less than a first threshold, the vehicle's heating strategy is determined to be an air source heat pump heating strategy, a positive temperature coefficient heating strategy, and a gas-injection enthalpy-increasing heating strategy. The air source heat pump heating strategy is a thermal management strategy that uses air as a heat source and is used to control the vehicle's air conditioning system. The positive temperature coefficient heating strategy is a thermal management strategy that uses heating components as a heat source and is used to control the vehicle's air conditioning system. The gas-injection enthalpy-increasing heating strategy is a thermal management strategy that controls the air conditioning system's compressor to increase the air conditioning system's heating capacity. Based on the air source heat pump heating strategy, the positive temperature coefficient heating strategy, and the gas-injection enthalpy-increasing heating strategy, the vehicle's air conditioning system is controlled to increase the vehicle's interior temperature. Compared with existing technologies that only use gas injection and enthalpy-increasing heating strategies to increase the temperature inside the vehicle, this method combines air source heat pump heating strategies, positive temperature coefficient heating strategies, and gas injection and enthalpy-increasing heating strategies to control the vehicle's air conditioning system, thereby increasing the heating capacity of the air conditioning system, improving the energy efficiency of the air conditioning system, and reducing energy consumption.

[0117] In one embodiment of this application, when the vehicle controller controls the vehicle's air conditioning system according to the air source heat pump heating strategy, the positive temperature coefficient heating strategy, and the gas injection enthalpy-increasing heating strategy, the vehicle controller can obtain the water temperature at the outlet of the drive motor in real time and continue to compare the water temperature with a first threshold and a second threshold. The second threshold can be set according to actual needs and is not limited here; for example, the second threshold can be set to 0 degrees Celsius.

[0118] When the vehicle controller detects that the water temperature is greater than or equal to the first threshold and less than the second threshold, it can perform the following actions: Figure 5 The steps S201 to S202 are shown.

[0119] Based on this, please refer to Figure 5 , Figure 5 This is another embodiment of the vehicle thermal management control method provided in this application. Relative to... Figure 4 In a corresponding embodiment, this embodiment may further include S201 to S202 after S103, as detailed below:

[0120] In S201, if the water temperature is greater than or equal to the first threshold and less than the second threshold, then the heating strategy of the vehicle is determined to be the positive temperature coefficient heating strategy and the drive motor waste heat heating strategy; the drive motor waste heat heating strategy is a thermal management strategy that uses the waste heat generated during the operation of the drive motor as a heat source and is used to control the air conditioning system of the vehicle.

[0121] In this embodiment, when the vehicle controller detects that the water temperature at the outlet of the drive motor is greater than or equal to the first threshold and less than the second threshold, it indicates that the water temperature at the outlet of the drive motor is sufficient to use the waste heat generated by the drive motor to increase the vehicle's interior temperature. This satisfies the condition for the vehicle's air conditioning system to absorb the waste heat generated by the drive motor. Therefore, the vehicle controller can determine that the vehicle's heating strategy at this time is a positive temperature coefficient heating strategy and a drive motor waste heat heating strategy.

[0122] Among them, the waste heat supply strategy of the drive motor is a thermal management strategy that uses the waste heat generated during the operation of the drive motor as a heat source and is used to control the vehicle's air conditioning system.

[0123] In S202, the vehicle's air conditioning system is controlled according to the positive temperature coefficient heating strategy and the waste heat heating strategy of the drive motor to increase the vehicle's interior temperature.

[0124] In this embodiment, the vehicle controller pre-stores the correspondence between the determined motor waste heat heating strategy and the third device in the vehicle's air conditioning system.

[0125] For example, please refer to Figure 3 The fourth component includes, but is not limited to: compressor 100, water-cooled condenser 101, first intermediate heat exchanger 102, second intermediate heat exchanger 103, second electronic expansion valve 118, cooler 119, first check valve 121, first tee fitting 108, third tee fitting 120, first four-way fitting 110, second four-way fitting 111 and first shut-off valve 107.

[0126] In this embodiment, after determining that the vehicle's heating strategy is a positive temperature coefficient heating strategy and a drive motor waste heat heating strategy, the vehicle controller can control the vehicle's air conditioning system according to the positive temperature coefficient heating strategy and the drive motor waste heat heating strategy.

[0127] Specifically, in conjunction with S103, the vehicle controller can control the second device in the vehicle's air conditioning system that corresponds to the positive temperature coefficient heating strategy according to the positive temperature coefficient heating strategy; and control the fourth device in the vehicle's air conditioning system that corresponds to the waste heat heating strategy of the drive motor according to the waste heat heating strategy of the drive motor.

[0128] As can be seen from the above, the vehicle thermal management control method provided in this embodiment, after controlling the vehicle's air conditioning system according to the air source heat pump heating strategy, the positive temperature coefficient heating strategy, and the gas injection enthalpy-increasing heating strategy, continues to detect the water temperature at the outlet of the drive motor. If the water temperature at the drive motor outlet is detected to be greater than or equal to a first threshold and less than a second threshold, then the vehicle's heating strategy is determined to be a positive temperature coefficient heating strategy and a drive motor waste heat heating strategy. The drive motor waste heat heating strategy is a thermal management strategy that uses the waste heat generated during the operation of the drive motor as a heat source to control the vehicle's air conditioning system. Based on the positive temperature coefficient heating strategy and the drive motor waste heat heating strategy, the vehicle's air conditioning system is controlled to increase the vehicle's interior temperature. The method provided in this embodiment can utilize the waste heat generated during the operation of the drive motor as a heat source, thereby further improving the energy efficiency of the vehicle's air conditioning system.

[0129] In another embodiment of this application, when the vehicle controller controls the vehicle's air conditioning system according to the positive temperature coefficient heating strategy and the drive motor waste heat heating strategy, the vehicle controller can obtain the water temperature at the outlet of the drive motor in real time and continue to compare the water temperature with the second threshold.

[0130] When the vehicle controller detects that the water temperature exceeds the second threshold, it can perform the following actions: Figure 6 The steps S301 to S304 are shown.

[0131] Based on this, please refer to Figure 6 , Figure 6 This is another embodiment of the vehicle thermal management control method provided in this application. Compared to... Figure 5 In a corresponding embodiment, this embodiment may further include S301 to S303 after S202, as detailed below:

[0132] In S301, if the water temperature is greater than the second threshold, the outside temperature of the vehicle is obtained.

[0133] In one implementation of this embodiment, the vehicle controller can obtain the outside temperature of the vehicle in real time through a second temperature sensor that is wirelessly connected to it.

[0134] In another implementation of this embodiment, the vehicle controller can also obtain the vehicle's outside temperature in real time through a server wirelessly connected to it. The server can be a desktop computer, a computer, or other similar device.

[0135] In this embodiment, after obtaining the outside temperature of the vehicle, the vehicle controller can compare the outside temperature with a third threshold. The third threshold can be set according to actual needs and is not limited here; for example, the third threshold can be set to 0 degrees Celsius.

[0136] In one embodiment of this application, when the vehicle controller detects that the outside temperature is greater than or equal to a third threshold, it may execute steps S302 to S303.

[0137] In another embodiment of this application, when the vehicle controller detects that the outside temperature is less than a third threshold, it indicates that the air cannot provide a sufficient heat source for the air conditioning system, resulting in low heating efficiency of the air conditioning system. Therefore, the vehicle controller can perform actions such as... Figure 7 S401 to S403 are shown.

[0138] In S302, if the outside temperature of the vehicle is greater than or equal to the third threshold, the heating strategy of the vehicle is determined to be the positive temperature coefficient heating strategy and the air source heat pump heating strategy.

[0139] In this embodiment, when the vehicle controller detects that the outside temperature is greater than or equal to the third threshold, since the air source heat pump heating strategy uses air as a heat source, and the outside temperature is greater than or equal to the third threshold, it indicates that the air can provide a higher heat source for the air conditioning system. Therefore, the vehicle controller can determine that the vehicle's heating strategy is a positive temperature coefficient heating strategy and an air source heat pump heating strategy.

[0140] In S303, the air conditioning system is controlled according to the air source heat pump heating strategy and the positive temperature coefficient heating strategy to increase the interior temperature of the vehicle.

[0141] It should be noted that the vehicle controller has pre-stored the correspondence between the air source heat pump heating strategy and the first device in the vehicle's air conditioning system. Therefore, after determining that the vehicle's heating strategy is an air source heat pump heating strategy, the vehicle controller can control the first device in the air conditioning system based on this air source heat pump heating strategy.

[0142] Please see Figure 3The first component includes, but is not limited to: compressor 100, water-cooled condenser 101, first intermediate heat exchanger 102, second intermediate heat exchanger 103, first electronic expansion valve 104, outdoor heat exchanger 105, first three-way valve 106, first shut-off valve 107, first three-way fitting 108, second three-way fitting 109, first four-way fitting 110, and second four-way fitting 111.

[0143] In one embodiment of this application, the vehicle controller can specifically control the first device in the vehicle's air conditioning system according to the air source heat pump heating strategy, as detailed below:

[0144] According to the air source heat pump heating strategy, the compressor, the water-cooled condenser, the first intermediate heat exchanger, the second intermediate heat exchanger, the first electronic expansion valve, the outdoor heat exchanger, and the first shut-off valve are controlled to open. The first connection passage between the compressor and the first shut-off valve is controlled by the first tee fitting, the second connection passage between the first intermediate heat exchanger and the second intermediate heat exchanger is controlled by the first four-way fitting, the third connection passage between the first electronic expansion valve and the outdoor heat exchanger is controlled by the second tee fitting, and the fourth connection passage between the outdoor heat exchanger and the first intermediate heat exchanger is controlled by the first tee valve and the first four-way fitting.

[0145] In this embodiment, the vehicle controller can simultaneously utilize two intermediate heat exchangers to further reduce the refrigerant enthalpy, thereby increasing the heat absorbed from outside the vehicle, thus improving the heating capacity, which in turn increases the interior temperature and improves the energy efficiency of the air conditioning system.

[0146] It should be noted that the vehicle controller has pre-stored the correspondence between the positive temperature coefficient heating strategy and the second device in the vehicle's air conditioning system. Therefore, after determining that the vehicle's heating strategy is a positive temperature coefficient heating strategy, the vehicle controller can control the second device in the air conditioning system based on this positive temperature coefficient heating strategy.

[0147] Please continue reading. Figure 3 The second component includes, but is not limited to: a water-cooled condenser 101, a first water pump 112, a heating component 113, a warm air core 114, a four-way valve 115, a first expansion tank 116, and a fourth three-way fitting 117.

[0148] In one embodiment of this application, the vehicle controller can specifically control the second device in the vehicle's air conditioning system according to the positive temperature coefficient heating strategy, as detailed below:

[0149] According to the positive temperature coefficient heating strategy, the water-cooled condenser, the first water pump, the heating component, the warm air core and the first expansion tank are controlled to open, and the tenth connection passage between the warm air core and the first expansion tank is connected by the four-way valve and the fourth three-way pipe fitting.

[0150] As can be seen from the above, the vehicle thermal management control method provided in this embodiment, after controlling the vehicle's air conditioning system according to the positive temperature coefficient heating strategy and the drive motor waste heat heating strategy, can detect whether the water temperature at the outlet of the drive motor is greater than or equal to a second threshold. When the water temperature is detected to be greater than the second threshold, the vehicle's outside temperature is obtained. If the outside temperature is greater than or equal to a third threshold, since the air source heat pump heating strategy uses air as a heat source, an outside temperature greater than or equal to the third threshold indicates that air can provide a significant heat source for the air conditioning system. Therefore, the vehicle controller can determine that the vehicle's heating strategy is a positive temperature coefficient heating strategy and an air source heat pump heating strategy. Based on the air source heat pump heating strategy and the positive temperature coefficient heating strategy, the vehicle's air conditioning system is controlled. The method provided in this embodiment can further improve the vehicle's interior temperature.

[0151] Please see Figure 7 , Figure 7 This is another embodiment of the vehicle thermal management control method provided in this application. Compared to... Figure 5 In a corresponding embodiment, this embodiment may further include S401 to S402 after S301, as detailed below:

[0152] In S401, if the outside temperature of the vehicle is less than the third threshold, the heating strategy of the vehicle is determined to be the positive temperature coefficient heating strategy and the waste heat heating strategy of the drive motor.

[0153] In this embodiment, when the vehicle controller detects that the outside temperature is less than the third threshold, since the air source heat pump heating strategy uses air as a heat source, and the outside temperature is less than the third threshold, it means that the air cannot provide a high heat source for the air conditioning system, resulting in low heating efficiency of the air conditioning system. Therefore, at this time, the vehicle controller can determine that the vehicle's heating strategy is a positive temperature coefficient control strategy and a drive motor waste heat heating strategy.

[0154] In S402, the air conditioning system is controlled according to the positive temperature coefficient heating strategy and the waste heat heating strategy of the drive motor to increase the interior temperature of the vehicle.

[0155] It should be noted that the vehicle controller pre-stores the correspondence between the positive temperature coefficient heating strategy and the second device in the vehicle's air conditioning system, as well as the correspondence between the drive motor waste heat heating strategy and the third device in the vehicle's air conditioning system. Therefore, after determining that the vehicle's heating strategy is a positive temperature coefficient heating strategy and a drive motor waste heat heating strategy, the vehicle controller can control the second device in the air conditioning system based on the positive temperature coefficient heating strategy and control the fourth device in the air conditioning system based on the drive motor waste heat heating strategy.

[0156] Please continue reading. Figure 3 The fourth component includes, but is not limited to: compressor 100, water-cooled condenser 101, first intermediate heat exchanger 102, second intermediate heat exchanger 103, second electronic expansion valve 118, cooler 119, first check valve 121, first tee fitting 108, third tee fitting 120, first four-way fitting 110, second four-way fitting 111 and first shut-off valve 107.

[0157] In one embodiment of this application, the vehicle controller can specifically control the fourth device in the vehicle's air conditioning system according to the waste heat heating strategy of the drive motor, as detailed below:

[0158] According to the waste heat supply strategy of the drive motor, the compressor, the water-cooled condenser, the first intermediate heat exchanger, the second intermediate heat exchanger, the second electronic expansion valve, the cooler, and the first shut-off valve are controlled to open. The first connection passage between the compressor and the first shut-off valve is connected by the first tee fitting. The fifth connection passage between the first intermediate heat exchanger and the second electronic expansion valve is connected by the first four-way fitting. The sixth connection passage between the cooler and the second intermediate heat exchanger is connected by the third tee fitting. The seventh connection passage between the second intermediate heat exchanger and the first intermediate heat exchanger is connected by the second four-way fitting and the first one-way valve.

[0159] It should be noted that in this embodiment, the vehicle controller can simultaneously utilize two intermediate heat exchangers to further reduce the refrigerant enthalpy, thereby increasing the heating capacity, which in turn increases the interior temperature and improves the energy efficiency of the air conditioning system.

[0160] As can be seen from the above, the vehicle thermal management control method provided in this embodiment, if the outside temperature is less than the third threshold, since the air source heat pump heating strategy uses air as a heat source, and the outside temperature is less than the third threshold, it means that the air cannot provide a high enough heat source for the air conditioning system, resulting in low heating efficiency of the air conditioning system. Therefore, at this time, the vehicle controller can determine that the vehicle's heating strategy is a positive temperature coefficient heating strategy and a drive motor waste heat heating strategy. Based on the positive temperature coefficient heating strategy and the drive motor waste heat heating strategy, the vehicle's air conditioning system is controlled, thereby improving the heating efficiency of the air conditioning system. At the same time, using the drive motor waste heat heating strategy also reduces the energy consumption of the air conditioning system and improves the energy efficiency of the air conditioning system.

[0161] In another embodiment of this application, before step S103, in conjunction with S101, since the vehicle's air conditioning system heating function has just been turned on and the vehicle is in the power-on start-up state, that is, the vehicle's drive motor and battery pack have just started working. Since the battery pack has certain temperature requirements when it is working, but the temperature of the battery pack when it starts working does not meet the temperature requirements of the battery pack when it is working, the vehicle controller can control the vehicle's battery circuit to shut down, that is, shut down the third water pump in the battery circuit.

[0162] Meanwhile, when the drive motor is in operation, if its own temperature is too high, it can easily lead to damage to the drive motor and shorten the service life of the drive unit. Therefore, the vehicle controller needs to control the vehicle's drive motor circuit to start the self-circulation mode, that is, to turn on the second water pump in the drive motor circuit to start the self-circulation mode of the drive motor circuit, reduce the temperature of the drive motor itself, thereby avoiding damage to the drive motor and extending its service life.

[0163] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0164] Corresponding to the vehicle thermal management control method described in the above embodiments, Figure 8 This diagram illustrates a structural block diagram of a vehicle thermal management control device according to an embodiment of this application. For ease of explanation, only the parts relevant to the embodiment of this application are shown. (Refer to...) Figure 8 The vehicle thermal management control device 800 includes: a first acquisition unit 81, a first determination unit 82, and a first control unit 83. Wherein:

[0165] The first acquisition unit 81 is used to acquire the water temperature at the outlet of the vehicle's drive motor after detecting that the air conditioning heating function on the vehicle is turned on.

[0166] The first determining unit 82 is used to determine, if the water temperature is less than a first threshold, the heating strategy of the vehicle as an air source heat pump heating strategy, a positive temperature coefficient heating strategy, and a gas-injection enthalpy-increasing heating strategy; the air source heat pump heating strategy is a thermal management strategy that uses air as a heat source and is used to control the air conditioning system of the vehicle; the positive temperature coefficient heating strategy is a thermal management strategy that uses a heating component as a heat source and is used to control the air conditioning system of the vehicle; and the gas-injection enthalpy-increasing heating strategy is a thermal management strategy that controls the compressor of the air conditioning system to increase the heating capacity of the air conditioning system.

[0167] The first control unit 83 is used to control the vehicle's air conditioning system according to the air source heat pump heating strategy, the positive temperature coefficient heating strategy, and the gas replenishment enthalpy heating strategy, so as to increase the vehicle's interior temperature.

[0168] In one embodiment of this application, the vehicle thermal management control device 800 further includes a second control unit.

[0169] The second control unit is used to control the battery circuit located in the vehicle to shut down and to control the self-circulation mode located in the drive motor circuit to start.

[0170] In one embodiment of this application, the vehicle thermal management control device 800 further includes: a second determining unit and a third control unit. Wherein:

[0171] The second determining unit is used to determine the vehicle's heating strategy as the positive temperature coefficient heating strategy and the drive motor waste heat heating strategy if the water temperature is greater than or equal to the first threshold and less than the second threshold; the drive motor waste heat heating strategy is a thermal management strategy that uses the waste heat generated during the operation of the drive motor as a heat source and is used to control the vehicle's air conditioning system.

[0172] The third control unit is used to control the vehicle's air conditioning system according to the positive temperature coefficient heating strategy and the waste heat heating strategy of the drive motor, so as to increase the vehicle's interior temperature.

[0173] In one embodiment of this application, the vehicle thermal management control device 800 further includes: a second acquisition unit, a third determination unit, and a fourth control unit. Wherein:

[0174] The second acquisition unit is used to acquire the outside temperature of the vehicle if the water temperature is greater than the second threshold.

[0175] The third determining unit is used to determine the vehicle's heating strategy as the positive temperature coefficient heating strategy and the air source heat pump heating strategy if the outside temperature is greater than or equal to a third threshold.

[0176] The fourth control unit is used to control the air conditioning system according to the air source heat pump heating strategy and the positive temperature coefficient heating strategy to increase the interior temperature of the vehicle.

[0177] In one embodiment of this application, the vehicle thermal management control device 800 further includes: a fourth determining unit and a fifth control unit. Wherein:

[0178] The fourth determining unit is used to determine the vehicle's heating strategy as the positive temperature coefficient heating strategy and the drive motor waste heat heating strategy if the outside temperature is less than the third threshold.

[0179] The fifth control unit is used to control the air conditioning system according to the positive temperature coefficient heating strategy and the waste heat heating strategy of the drive motor, so as to increase the interior temperature of the vehicle.

[0180] It should be noted that the information interaction and execution process between the above-mentioned devices / units are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, and they will not be repeated here.

[0181] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0182] Figure 9 This is a schematic diagram of the structure of an on-board controller provided in one embodiment of this application. Figure 9 As shown, the vehicle controller 9 of this embodiment includes: at least one processor 90 ( Figure 9 (Only one is shown) a processor, a memory 91, and a computer program 92 stored in the memory 91 and executable on the at least one processor 90, wherein the processor 90 executes the computer program 92 to implement the steps in any of the above-described vehicle thermal management control method embodiments.

[0183] The vehicle controller may include, but is not limited to, a processor 90 and a memory 91. Those skilled in the art will understand that... Figure 9 The vehicle controller 9 is merely an example and does not constitute a limitation on it. It may include more or fewer components than shown, or combine certain components, or different components, such as input / output devices, network access devices, etc.

[0184] The processor 90 may be a Central Processing Unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0185] In some embodiments, the memory 91 may be an internal storage unit of the vehicle controller 9, such as the RAM of the vehicle controller 9. In other embodiments, the memory 91 may be an external storage device of the vehicle controller 9, such as a plug-in hard drive, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the vehicle controller 1. Furthermore, the memory 91 may include both internal storage units and external storage devices of the vehicle controller 9. The memory 91 is used to store the operating system, applications, bootloader, data, and other programs, such as the program code of the computer program. The memory 91 can also be used to temporarily store data that has been output or will be output.

[0186] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps described in the various method embodiments above.

[0187] This application provides a computer program product that, when run on an in-vehicle controller, enables the in-vehicle controller to perform the steps described in the above-described method embodiments.

[0188] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of this application can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include at least: any entity or device capable of carrying the computer program code to the vehicle controller, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium. Examples include USB flash drives, portable hard drives, magnetic disks, or optical disks. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electrical carrier signals or telecommunication signals.

[0189] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0190] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A control method for vehicle thermal management, characterized in that, include: When the vehicle's air conditioning heating function is detected to be turned on, the water temperature at the outlet of the drive motor is obtained by the first temperature sensor located at the outlet of the drive motor. If the water temperature is less than a first threshold, the vehicle's heating strategy is determined to be an air source heat pump heating strategy, a positive temperature coefficient heating strategy, and a gas-injection enthalpy-increasing heating strategy. The air source heat pump heating strategy is a thermal management strategy that uses air as a heat source to control the vehicle's air conditioning system. The positive temperature coefficient heating strategy is a thermal management strategy that uses heating components as a heat source to control the vehicle's air conditioning system. The gas-injection enthalpy-increasing heating strategy is a thermal management strategy that controls the compressor of the air conditioning system to increase the heating capacity of the air conditioning system. The correspondence between the air source heat pump heating strategy and the first component in the vehicle's air conditioning system, the correspondence between the temperature coefficient heating strategy and the second component in the vehicle's air conditioning system, and the correspondence between the gas-injection enthalpy-increasing heating strategy and the third component in the vehicle's air conditioning system are pre-stored. The battery system located in the vehicle is shut down, and the drive motor system is put into self-circulation mode. Based on the air source heat pump heating strategy, the positive temperature coefficient heating strategy, the gas replenishment enthalpy heating strategy, and their corresponding relationships, the vehicle's air conditioning system is controlled to increase the vehicle's interior temperature. If the water temperature is greater than or equal to the first threshold and less than the second threshold, then the heating strategy of the vehicle is determined to be the positive temperature coefficient heating strategy and the drive motor waste heat heating strategy; the drive motor waste heat heating strategy is a thermal management strategy that uses the waste heat generated during the operation of the drive motor as a heat source and is used to control the air conditioning system of the vehicle. The vehicle's air conditioning system is controlled according to the positive temperature coefficient heating strategy and the waste heat heating strategy of the drive motor to increase the vehicle's interior temperature. If the water temperature is greater than the second threshold, the vehicle's outside temperature is obtained; wherein, the vehicle's outside temperature is obtained in real time through a second temperature sensor or a server; If the outside temperature is greater than or equal to the third threshold, then the heating strategy of the vehicle is determined to be the positive temperature coefficient heating strategy and the air source heat pump heating strategy. The air conditioning system is controlled according to the air source heat pump heating strategy and the positive temperature coefficient heating strategy to increase the interior temperature of the vehicle. If the outside temperature is less than the third threshold, then the heating strategy of the vehicle is determined to be the positive temperature coefficient heating strategy and the waste heat heating strategy of the drive motor. The air conditioning system is controlled according to the positive temperature coefficient heating strategy and the waste heat heating strategy of the drive motor to increase the interior temperature of the vehicle.

2. A control system, characterized in that, include: An on-board controller, connected to a thermal management system, is used to execute the control method for vehicle thermal management as described in claim 1; The thermal management system is used to provide heat according to the vehicle's heating strategy determined by the on-board controller.

3. The control system as described in claim 2, characterized in that, The thermal management system includes: an air source heat pump heating module, a positive temperature coefficient heating module, a gas replenishment and enthalpy-increasing heating module, and a drive motor waste heat heating module. The vehicle controller is also connected to the air source heat pump heating module, the positive temperature coefficient heating module, the gas replenishment enthalpy heating module, and the drive motor waste heat heating module. The vehicle controller is also used to send a first control signal to the air source heat pump heating module when it detects that the heating strategy is an air source heat pump heating strategy, send a second control signal to the positive temperature coefficient heating module when it detects that the heating strategy is a gas replenishment enthalpy heating strategy, send a third control signal to the gas replenishment enthalpy heating module when it detects that the heating strategy is a drive motor waste heat heating strategy, and send a fourth control signal to the drive motor waste heat heating module when it detects that the heating strategy is a drive motor waste heat heating strategy. The air source heat pump heating module is used to provide heat when it receives the first control signal; The positive temperature coefficient heating module is used to provide heat when it receives the second control signal; The gas replenishment and enthalpy-increasing heating module is used to provide heat when it receives the third control signal; The waste heat supply module of the drive motor is used to supply heat when the fourth control signal is received.

4. The control system as described in claim 3, characterized in that, The air source heat pump heating module includes: a compressor, a water-cooled condenser, a first intermediate heat exchanger, a second intermediate heat exchanger, a first electronic expansion valve, an outdoor heat exchanger, a first three-way valve, and a first shut-off valve; wherein the compressor, the first shut-off valve, the water-cooled condenser, the first intermediate heat exchanger, the second intermediate heat exchanger, the first electronic expansion valve, the outdoor heat exchanger, and the first three-way valve are connected end to end in sequence to form an air source heat pump heating circuit.

5. The control system as described in claim 3, characterized in that, The positive temperature coefficient heating module includes: a water-cooled condenser, a first water pump, a heating component, a warm air core, a four-way valve, and a first expansion tank; wherein the water-cooled condenser, the first water pump, the heating component, the warm air core, the four-way valve, and the first expansion tank are connected end to end in sequence to form a positive temperature coefficient heating circuit.

6. The control system as described in claim 3, characterized in that, The gas replenishment and enthalpy-increasing heating module includes: a compressor, a water-cooled condenser, a first intermediate heat exchanger, a second electronic expansion valve, a cooler, a second intermediate heat exchanger, a first electronic expansion valve, an outdoor heat exchanger, a first three-way valve, and a first shut-off valve; wherein the compressor, the first shut-off valve, the water-cooled condenser, the first intermediate heat exchanger, the second electronic expansion valve, the cooler, the second intermediate heat exchanger, the first electronic expansion valve, the outdoor heat exchanger, and the first three-way valve are connected end to end in sequence to form a gas replenishment and enthalpy-increasing heating circuit.

7. The control system as described in claim 2, characterized in that, The waste heat supply module for the drive motor includes: a compressor, a water-cooled condenser, a first intermediate heat exchanger, a second intermediate heat exchanger, a second electronic expansion valve, a cooler, a first check valve, and a first shut-off valve; wherein the compressor, the first shut-off valve, the water-cooled condenser, the first intermediate heat exchanger, the second electronic expansion valve, the cooler, the second intermediate heat exchanger, the first check valve, and the first intermediate heat exchanger are connected end to end in sequence to form a waste heat supply circuit for the drive motor.

8. A vehicle, characterized in that, It includes an on-board controller, which is used to perform the control method for vehicle thermal management as described in claim 1.

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