A thermal management control method and a thermal management control system for a vehicle

Abstract

The application provides a heat management control method and system for a vehicle, wherein the method comprises: identifying whether a battery of the vehicle has a heating demand; if the battery has the heating demand, identifying a working state of a power source of the vehicle, and judging whether the vehicle satisfies a waste heat heating condition according to the identified working state; if the waste heat heating condition is satisfied, using waste heat of the power source to heat the battery; if the waste heat heating condition is not satisfied, determining whether a starting condition of starting a heat pump system of the vehicle is satisfied according to an ambient temperature of the vehicle; if the starting condition is satisfied, starting an evaporator in the heat pump system to heat the battery; and if the starting condition is not satisfied, starting a battery loop PTC and a water heating electric heating WPTC of the vehicle to heat the battery. Through the application, the efficiency and utilization of waste heat recovery are improved, and the goal of energy saving and emission reduction is achieved.

Description

Technical Field

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

[0002] Current technology integrates multiple heat sources from hybrid and range-extended vehicles, utilizes the opening and closing control of the positive temperature coefficient (PTC) in the coolant circulation loop, and precise management of the flow direction of three-way and four-way valves to achieve cooling of the electric drive system, as well as cooling or heating of the cabin and battery pack.

[0003] However, the heat exchange between different thermal loops within this technological framework is relatively limited, hindering the efficient and optimal utilization of energy. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a thermal management control method and thermal management control system for vehicles, which aims to improve the efficiency and utilization rate of waste heat recovery.

[0005] In a first aspect, this application provides a thermal management control method for a vehicle, the method comprising: identifying whether the vehicle's battery has a heating requirement; if the battery has a heating requirement, identifying the operating state of the vehicle's power source, and determining whether the vehicle meets the waste heat heating conditions based on the identified operating state; if the waste heat heating conditions are met, using the waste heat of the power source to heat the battery; if the waste heat heating conditions are not met, determining whether the starting conditions for starting the vehicle's heat pump system are met based on the ambient temperature of the vehicle; if the starting conditions are met, starting the evaporator in the heat pump system to heat the battery; if the starting conditions are not met, starting the vehicle's battery circuit PTC and water-cooled electric heating WPTC to heat the battery.

[0006] In one possible implementation, the power source includes an engine and an electric drive, and the waste heat heating conditions include a first waste heat heating condition and a second waste heat heating condition. The implementation further includes: when the engine is in an operating state, determining that the vehicle meets the first waste heat heating condition to use the waste heat from the engine to heat the battery; and when the electric drive is in an operating state, determining that the vehicle meets the second waste heat heating condition to use the waste heat from the electric drive to heat the battery.

[0007] In one possible implementation, the waste heat of the engine is used to heat the battery in the following manner: when the vehicle meets the first waste heat heating condition, the first and second ports of the first three-way valve on the engine heating circuit are opened, the first and second ports of the second three-way valve on the engine heating circuit are opened, and the heater shut-off valve on the engine heating circuit is opened, so as to heat the engine heating circuit with the waste heat of the engine, so that the heat in the engine heating circuit enters the plate heat exchanger provided on the engine heating circuit through the second three-way valve and the heater shut-off valve. At the same time, the first and second ports of the four-way valve on the battery heating circuit are opened, and the first and second ports of the third three-way valve on the battery heating circuit are opened, so that the heat in the plate heat exchanger provides heat to the battery through the battery heating circuit, so as to heat the battery with the waste heat of the engine.

[0008] In one possible implementation, the waste heat from the electric drive is used to heat the battery by: controlling the first and second ports of the third three-way valve on the battery heating circuit to be open, controlling all ports of the four-way valve on the battery heating circuit to be open, and controlling the first and second ports of the fourth three-way valve on the electric drive heating circuit to be open, thereby heating the electric drive heating circuit with the waste heat from the electric drive. The heat in the electric drive heating circuit then enters the plate heat exchanger located on the engine heating circuit via the fourth three-way valve, the four-way valve, and the third three-way valve, so that the heat in the plate heat exchanger provides heat to the battery via the battery heating circuit, thereby heating the battery with the waste heat from the electric drive.

[0009] In one possible implementation, the method further includes: in response to a heating request for the passenger cabin of the vehicle, identifying the operating status of the vehicle's engine, and determining whether the vehicle meets the first waste heat heating condition based on the identified operating status; if the first waste heat heating condition is met, controlling the opening of the heater shut-off valve on the engine heating circuit, controlling the opening of the first and third ports of the first three-way valve on the engine heating circuit, and controlling the opening of the first and second ports of the second three-way valve on the engine heating circuit, to heat the engine heating circuit using the engine's waste heat, so that the heat in the engine heating circuit enters the HVAC cabin heater core installed on the engine heating circuit via the second three-way valve and the heater shut-off valve, so as to heat the passenger cabin using the engine's waste heat; if the first waste heat heating condition is not met, the method further includes: ... If the engine waste heat heating condition is specified, it is determined whether the vehicle meets the starting conditions, which indicate that the ambient temperature of the vehicle is within a preset temperature range. If the starting conditions are met, the heat pump four-way reversing valve on the passenger compartment heating circuit is opened, the evaporator on the passenger compartment heating circuit is started, the passenger compartment cooling shut-off valve on the passenger compartment heating circuit is opened, and the thermal expansion valve on the passenger compartment heating circuit is opened to generate heat through the evaporator. The heat generated by the evaporator enters the HVAC cabin heater core in the passenger compartment heating circuit through the passenger compartment cooling shut-off valve and the thermal expansion valve to heat the passenger compartment. If the starting conditions are not met, the vehicle's air-cooled electric heater PTC and water-cooled electric heater WPTC are started to heat the passenger compartment.

[0010] In one possible implementation, the step of activating the vehicle's battery circuit PTC and water-cooled electric heating WPTC to heat the battery includes: controlling the first and second ports of the four-way valve on the battery heating circuit to open, controlling the first and second ports of the third three-way valve on the battery heating circuit to open, controlling the first electronic water pump and the battery circuit PTC to turn on, so that the heat provided by the battery circuit PTC flows through the battery to heat the battery; upon receiving an instruction to turn on the water-cooled electric heating WPTC, controlling the water-cooled electric heating WPTC and the second electronic water pump on the water-cooled electric heating circuit to turn on, controlling the first and second ports of the first three-way valve on the engine heating circuit to open, controlling the first and second ports of the second three-way valve to open, and controlling the heater shut-off valve to open, so that the water-cooled electric heating WPTC and the battery circuit PTC together heat the battery.

[0011] In one possible implementation, the method further includes: responding to the cooling demand of the vehicle's passenger cabin, controlling the HVAC cabin evaporator, first fan, compressor, and condenser on the passenger cabin cooling circuit to turn on, and controlling the heat pump four-way reversing valve, passenger cabin cooling shut-off valve, and thermostatic expansion valve on the passenger cabin cooling circuit to be open, so that the refrigerant is compressed and condensed through the heat pump four-way reversing valve, the compressor, and the condenser to obtain liquid refrigerant, so that the liquid refrigerant enters the HVAC cabin evaporator after being regulated by the thermostatic expansion valve, and the first fan blows the cooled air in the HVAC cabin evaporator into the passenger cabin to provide cooling for the passenger cabin.

[0012] In one possible implementation, the method further includes: identifying whether the battery has a cooling requirement; if the battery has a cooling requirement, controlling the first and second ports of the four-way valve on the battery cooling circuit to open, controlling the first and third ports of the third three-way valve on the battery cooling circuit to open, and controlling the battery circuit radiator, second fan, third electric water pump, and fourth electric water pump on the battery cooling circuit to turn on, so as to provide cooling through the battery circuit radiator, so that the cooling energy flows through the battery through the drive of the third and fourth electric water pumps and absorbs the heat of the battery, so as to cool the battery through the battery circuit radiator; when the temperature of the electric drive is lower than the temperature of the battery, controlling the third port of the third three-way valve to close, controlling the battery circuit radiator and the third electric water pump to turn off, while controlling all ports of the four-way valve to open, controlling the second port of the third three-way valve to open, and controlling the electric drive circuit radiator, third fan, and fifth electric water pump of the electric drive cooling circuit to turn on. The system controls the first and second ports of the fourth three-way valve to open, providing cooling through the electric drive circuit radiator. This cooling is then driven by the fifth electronic water pump, flowing through the four-way valve, the third three-way valve, and the fourth electronic water pump in the electric drive cooling circuit, passing through the battery and absorbing its heat. This heat is then used to cool the battery through the electric drive circuit radiator. When neither the battery circuit radiator nor the electric drive circuit radiator can meet the battery's cooling requirements, the system closes the third and fourth ports of the four-way valve, closes the fourth three-way valve, shuts off the electric drive circuit radiator and the third fan, closes the fifth electronic water pump and the fourth three-way valve, and opens the heat pump four-way reversing valve and the electronic expansion valve in the cabin cooling circuit. It also turns on the compressor, battery cooler, and first electronic water pump in the battery cooling circuit, opens the first and second ports of the four-way valve, and opens the first and second ports of the third three-way valve to cool the battery through the battery cooler.

[0013] In one possible implementation, the method further includes: identifying whether the electric drive of the vehicle has a cooling requirement; if the electric drive has a cooling requirement, controlling the electric drive circuit radiator, the third fan, and the fifth electric water pump of the electric drive cooling circuit to turn on, and controlling the fourth three-way valve to open, so as to provide cooling through the electric drive circuit radiator, so that the cooling flows through the electric drive via the fifth electric water pump 1 and the four-way valve on the electric drive cooling circuit and absorbs the heat of the electric drive, so as to cool the electric drive through the electric drive circuit radiator; when the temperature of the electric drive is lower than the temperature of the battery, controlling all ports of the four-way valve to open, controlling the first and third ports of the third three-way valve on the battery cooling circuit to open, and controlling the battery circuit radiator, the second fan, the third electric water pump, and the fourth electric water pump on the battery cooling circuit to turn on, so as to provide cooling through the battery circuit radiator and the electric drive circuit radiator together to cool the electric drive.

[0014] Secondly, this application provides a vehicle thermal management control system, the system comprising: a battery; a power source for heating the battery using waste heat when the vehicle meets waste heat heating conditions; an evaporator for heating the battery when the vehicle meets starting conditions; a battery circuit PTC for heating the battery when the vehicle does not meet starting conditions; a water-cooled electric heating WPTC for heating the battery when the vehicle does not meet starting conditions; and a controller configured to: identify whether the vehicle's battery has a heating requirement; if the battery has a heating requirement, then identify... The system monitors the operating status of the vehicle's power source and determines whether the vehicle meets the waste heat heating conditions based on the identified operating status. If the waste heat heating conditions are met, the waste heat from the power source is used to heat the battery. If the waste heat heating conditions are not met, the system determines whether the starting conditions for starting the vehicle's heat pump system are met based on the ambient temperature of the vehicle. If the starting conditions are met, the evaporator in the heat pump system is activated to heat the battery. If the starting conditions are not met, the vehicle's battery circuit PTC and water-cooled electric heating WPTC are activated to heat the battery.

[0015] This application provides a thermal management control method and control system for a vehicle. The method includes: identifying whether the vehicle's battery has a heating requirement; if the battery has a heating requirement, identifying the operating state of the vehicle's power source and determining whether the vehicle meets the waste heat heating conditions based on the identified operating state; if the waste heat heating conditions are met, using the waste heat from the power source to heat the battery; if the waste heat heating conditions are not met, determining whether the starting conditions for starting the vehicle's heat pump system are met based on the ambient temperature of the vehicle; if the starting conditions are met, starting the evaporator in the heat pump system to heat the battery; if the starting conditions are not met, starting the vehicle's battery circuit PTC and water-cooled electric heating WPTC to heat the battery. This application improves the efficiency and utilization rate of waste heat recovery, thereby achieving the goal of energy conservation and emission reduction.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A flowchart of a vehicle thermal management control method provided in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of a thermal management system that uses engine waste heat to heat the battery, as provided in an embodiment of this application.

[0020] Figure 3 This is a schematic diagram of a thermal management system that uses waste heat from an electrically driven vehicle to heat a battery, as provided in an embodiment of this application.

[0021] Figure 4 This is a schematic diagram of a thermal management system structure that uses an evaporator to heat a battery, as provided in an embodiment of this application.

[0022] Figure 5 A schematic diagram of a thermal management system using a battery circuit PTC and a water heating WPTC for battery heating, provided in an embodiment of this application.

[0023] Figure 6 The flowchart for cabin heating provided in this application embodiment is shown below;

[0024] Figure 7 A schematic diagram of a thermal management system that uses the waste heat of the engine to heat the passenger cabin, provided in an embodiment of this application.

[0025] Figure 8 This is a schematic diagram of a thermal management system for heating the cabin using an evaporator, provided in an embodiment of this application.

[0026] Figure 9 This is a schematic diagram of a thermal management system using HVAC for cabin cooling, provided in an embodiment of this application.

[0027] Figure 10 The flowchart provided in this application is for battery cooling.

[0028] Figure 11 This is a schematic diagram of a thermal management system structure that uses a battery circuit radiator to cool the battery, as provided in an embodiment of this application.

[0029] Figure 12 This is a schematic diagram of a thermal management system structure that uses an electrically driven circuit heat sink to cool the battery, as provided in an embodiment of this application.

[0030] Figure 13 This is a schematic diagram of a thermal management system structure that uses a battery cooler to cool the battery, as provided in an embodiment of this application.

[0031] Figure 14 The flowchart provided in this application is for electrically driven refrigeration.

[0032] Figure 15 This is a schematic diagram of a thermal management system structure that uses a battery circuit radiator and an electric drive circuit radiator to cool the battery, as provided in an embodiment of this application.

[0033] Figure reference numerals: 101-First three-way valve; 102-Second three-way valve; 103-Third three-way valve; 104-Fourth three-way valve; 105-Four-way valve; 201-Heat air shut-off valve; 202-Heat pump four-way reversing valve; 203-Thermal expansion valve; 204-Passenger compartment cooling shut-off valve; 205-Electronic expansion valve; 301-Battery circuit PTC; 302-Water heating electric heating WPTC; 303-Air heating electric heating PTC; 401-Battery circuit radiator; 402-Second fan; 403-Evaporator; 404-First fan; 4 05-Engine Radiator; 406-Fourth Fan; 407-Electric Drive Circuit Radiator; 408-Third Fan; 501-Battery; 502-Electric Drive; 503-Engine; 504-Plate Heat Exchanger; 506-HVAC; 601-Third Electric Water Pump; 602-Fourth Electric Water Pump; 603-Fifth Electric Water Pump; 604-Second Electric Water Pump; 701-Pressure Switch; 702-First Expansion Tank; 703-Second Expansion Tank; 704-Third Expansion Tank; 801-Condenser; 802-Battery Cooler. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. Based on the embodiments of this application, every other embodiment obtained by those skilled in the art without inventive effort falls within the scope of protection of this application.

[0035] First, the applicable application scenarios of this application will be introduced. This application can be applied to automotive thermal management.

[0036] Research has shown that current technology integrates multiple heat sources from hybrid and range-extended vehicles, utilizes the opening and closing control of the PTC (Positive Temperature Coefficient) in the coolant circulation loop, and precisely manages the flow direction of three-way and four-way valves to achieve cooling of the electric drive system, as well as cooling or heating of the cabin and battery pack.

[0037] However, current technology's control logic is still relatively simple and fails to fully cover all operating scenarios and conditions of automobiles, especially when faced with complex needs such as heating the passenger compartment while cooling the battery pack. Furthermore, the limited heat exchange between different thermal loops within the current technological framework hinders efficient and optimized energy utilization.

[0038] Based on this, the embodiments of this application provide a thermal management control method and a thermal management control system for vehicles. Based on the actual vehicle operation status, considering the tiered utilization and on-demand allocation of heat, the priority of system component activation is determined according to the priority of heat utilization, and control strategies for relevant components are formulated to improve the efficiency and utilization rate of waste heat recovery, thereby achieving the goal of energy conservation and emission reduction.

[0039] Please see Figure 1 , Figure 1 This is a flowchart illustrating a vehicle thermal management control method provided in an embodiment of this application. Figure 1 As shown in the figure, the vehicle thermal management control method provided in this application embodiment includes:

[0040] S101, Identify whether the vehicle's battery 501 requires heating.

[0041] Here, the vehicle is a hybrid electric vehicle, and the heating demand refers to the heating demand generated when the temperature of the battery 501 is lower than the preset temperature. The temperature of the battery 501 is obtained by temperature sensors installed at both ends of the battery 501.

[0042] S102. If the battery 501 has a heating requirement, the working status of the vehicle's power source is identified, and the vehicle is judged to meet the waste heat heating conditions based on the identified working status.

[0043] In a preferred embodiment of this application, the power source includes an engine 503 and an electric drive 502. The waste heat heating conditions include a first waste heat heating condition and a second waste heat heating condition. When the engine 503 is in an operating state, it is determined that the vehicle meets the first waste heat heating condition so that the waste heat of the engine 503 can be used to heat the battery 501. When the electric drive 502 is in an operating state, it is determined that the vehicle meets the second waste heat heating condition so that the waste heat of the electric drive 502 can be used to heat the battery 501.

[0044] S103. If the waste heat heating conditions are met, the waste heat from the power source will be used to heat battery 501.

[0045] The following is through Figure 2 This section describes the process of using the waste heat from engine 503 to heat battery 501.

[0046] Figure 2This is a schematic diagram of a thermal management system that uses the waste heat of engine 503 to heat battery 501, as provided in an embodiment of this application.

[0047] When the vehicle meets the first waste heat heating condition, the first and second ports of the first three-way valve 101 on the engine heating circuit are opened, the first and second ports of the second three-way valve 102 on the engine heating circuit are opened, and the heater shut-off valve 201 on the engine heating circuit is opened, so that the waste heat of the engine 503 heats the engine heating circuit. The heat in the engine heating circuit enters the plate heat exchanger 504 set on the engine heating circuit through the second three-way valve 102 and the heater shut-off valve 201. At the same time, the first and second ports of the four-way valve 105 on the battery heating circuit are opened, and the first and second ports of the third three-way valve 103 on the battery heating circuit are opened, so that the heat in the plate heat exchanger 504 provides heat to the battery 501 through the battery heating circuit, so as to heat the battery 501 with the waste heat of the engine 503.

[0048] Here, when using the engine's waste heat to heat the battery, adding a heater shut-off valve to the engine heating circuit can achieve rapid warm-up and prevent the battery from being heated unnecessarily if the three-way valve malfunctions.

[0049] S104. If the waste heat heating conditions are not met, determine whether the starting conditions for starting the vehicle's heat pump system are met based on the ambient temperature of the vehicle.

[0050] The following is through Figure 3 This section describes the process of using the waste heat from the electric drive 502 to heat the battery 501.

[0051] Figure 3 This is a schematic diagram of a thermal management system that uses the waste heat from the electrically driven 502 to heat the battery 501, as provided in an embodiment of this application.

[0052] The first and second ports of the third three-way valve 103 on the battery heating circuit are opened, all ports of the four-way valve 105 on the battery heating circuit are opened, and the first and second ports of the fourth three-way valve 104 on the electric drive 502 heating circuit are opened. The waste heat of the electric drive 502 is used to heat the electric drive 502 heating circuit. The heat in the electric drive 502 heating circuit enters the plate heat exchanger 504 on the engine heating circuit through the fourth three-way valve 104, the four-way valve 105 and the third three-way valve 103. The heat in the plate heat exchanger 504 provides heat to the battery 501 through the battery heating circuit, so as to heat the battery 501 with the waste heat of the electric drive 502.

[0053] S105. If the start-up conditions are met, the evaporator 403 in the heat pump system will be started to heat the battery 501.

[0054] The following is through Figure 4 This describes the process of using evaporator 403 to heat battery 501.

[0055] Figure 4 This is a schematic diagram of the thermal management system structure that uses an evaporator 403 to heat the battery 501, as provided in an embodiment of this application.

[0056] Specifically, the heat pump four-way reversing valve 202 and electronic expansion valve 205 are turned on, and the condenser 801, evaporator 403 and fourth fan 406 are turned on, so as to heat the battery 501 through the evaporator 403.

[0057] S106. If the starting conditions are not met, the battery circuit PTC301 and the water heating and electric heating WPTC302 of the vehicle will heat the battery 501.

[0058] The following is through Figure 5 This section describes the process of using the battery circuit PTC301 and the water heating WPTC302 to heat battery 501.

[0059] Figure 5 This is a schematic diagram of a thermal management system that uses a battery circuit PTC301 and a water heating electric heater WPTC302 to heat the battery 501, as provided in an embodiment of this application.

[0060] The first and second ports of the four-way valve 105 on the battery heating circuit are opened, the first and second ports of the third three-way valve 103 on the battery heating circuit are opened, and the first electronic water pump and the battery circuit PTC301 on the battery heating circuit are opened, so that the heat provided by the battery circuit PTC301 flows through the battery 501 to heat the battery 501.

[0061] Upon receiving the instruction to turn on the water heating electric heater WPTC302, the system controls the water heating electric heater WPTC302 and the second electronic water pump 604 in the water heating electric heater circuit to turn on, controls the first port and the second port of the first three-way valve 101 in the engine heating circuit to turn on, controls the first port and the second port of the second three-way valve 102 to turn on, and controls the heater shut-off valve 201 to turn on, so that the water heating electric heater WPTC302 and the battery circuit PTC301 work together to heat the battery 501.

[0062] Figure 6 The flowchart for cabin heating provided in this application embodiment is shown below.

[0063] S201. In response to a heating request for the passenger cabin of the vehicle, the operating status of the vehicle's engine 503 is identified, and the vehicle is determined to meet the first waste heat heating condition based on the identified operating status.

[0064] S202. If the first waste heat heating condition is met, the waste heat from engine 503 will be used to heat the cabin.

[0065] Among them, the first waste heat heating condition is met when the engine 503 is in operation.

[0066] Figure 7 This is a schematic diagram of a thermal management system that uses the waste heat from engine 503 to heat the passenger cabin, as provided in an embodiment of this application.

[0067] The heater shut-off valve 201 on the engine heating circuit is opened, the first port and the third port of the first three-way valve 101 on the engine heating circuit are opened, and the first port and the second port of the second three-way valve 102 on the engine heating circuit are opened, so as to heat the engine heating circuit with the waste heat of the engine 503. The heat in the engine heating circuit enters the HVAC506 cabin heater core set on the engine heating circuit through the second three-way valve 102 and the heater shut-off valve 201, so as to heat the cabin with the waste heat of the engine 503.

[0068] S203. If the engine 503 waste heat heating condition is not met, determine whether the vehicle meets the starting conditions. The starting conditions indicate that the ambient temperature of the vehicle is within the preset temperature range.

[0069] S204. If the start-up conditions are met, the cabin will be heated through the evaporator 403.

[0070] Figure 8 This is a schematic diagram of the thermal management system structure for heating the cabin using an evaporator 403, as provided in an embodiment of this application.

[0071] The heat pump four-way reversing valve 202 on the cabin heating circuit is turned on, the evaporator 403 on the cabin heating circuit is started, the passenger compartment cooling shut-off valve 204 on the cabin heating circuit is turned on, and the thermal expansion valve 203 on the cabin heating circuit is turned on, so that the evaporator 403 generates heat, so that the heat generated by the evaporator 403 enters the cabin warm air core of HVAC506 in the cabin heating circuit through the passenger compartment cooling shut-off valve 204 and the thermal expansion valve, so as to provide heat to the cabin through the evaporator 403.

[0072] S205. If the starting conditions are not met, then the vehicle's air-heated electric heater PTC303 and water-heated electric heater WPTC302 are activated to provide heat to the passenger cabin.

[0073] The thermal management control system of this application has two operating modes: cooling and heating. The vehicle thermal management system includes a refrigerant circulation loop and a coolant circulation loop. The refrigerant circulation loop can provide cooling for the passenger compartment and battery in heat pump cooling mode, and heating for the passenger compartment and battery in heat pump heating mode. The HVAC506 evaporator provides cooling for the passenger compartment, and the battery cooler 802 provides cooling for the battery coolant. The refrigerant flow rate in the loop is distributed according to the cooling needs of the passenger compartment and battery. If the total refrigerant flow rate in the loop is Q, the refrigerant flow rate through the evaporator is Q1, and the refrigerant flow rate through the battery cooler 802 is Q2, then Q = Q1 + Q2, where Q1 depends on the opening degree of the thermal expansion valve 203, and Q2 depends on the opening degree of the electronic expansion valve 205. When summer temperatures are high and the cooling demands of both the cabin and the battery are high, the evaporation temperature of the cabin evaporator is low, and the corresponding evaporation pressure is also low. If the evaporation temperature of the cabin evaporator is much lower than that of the battery cooler 802, and the opening of the thermal expansion valve 203 is uncontrolled, there will be a problem with the refrigerant flow distribution between the two branches. Even if the electronic expansion valve is at its maximum opening, the refrigerant flow in the battery cooler 802 circuit is still much less than that in the cabin cooling circuit.

[0074] In a preferred example of this application, HVAC506 can also be used for cabin cooling.

[0075] Figure 9 This is a schematic diagram of the thermal management system structure for cabin cooling using HVAC506, provided in an embodiment of this application.

[0076] In response to the cooling demand of the vehicle's passenger cabin, the HVAC506 cabin evaporator 403, the first fan 404, the compressor, and the condenser 801 on the passenger cabin cooling circuit are turned on. The heat pump four-way reversing valve 202, the passenger cabin cooling shut-off valve 204, and the thermostatic expansion valve 203 on the passenger cabin cooling circuit are all turned on. The refrigerant is compressed and condensed by the heat pump four-way reversing valve 202, the compressor, and the condenser 801 to obtain liquid refrigerant. The liquid refrigerant enters the HVAC506 cabin evaporator 403 after being regulated by the thermostatic expansion valve. The first fan 404 blows the cooled air in the HVAC506 cabin evaporator 403 into the passenger cabin to provide cooling for the passenger cabin.

[0077] If the battery temperature is high at this time, the cabin cooling shut-off valve 204 will be closed to temporarily cut off the cabin cooling circuit in order to meet the battery cooling requirements, prevent battery overheating, and meet functional safety requirements.

[0078] In a preferred embodiment of this application, Figure 10 The flowchart for cooling battery 501 provided in the embodiments of this application is shown.

[0079] S301, Identify whether battery 501 requires cooling;

[0080] S302. If battery 501 requires cooling, then battery 501 is cooled by the battery circuit radiator 401.

[0081] Figure 11 This is a schematic diagram of the thermal management system structure that uses a battery circuit radiator 401 to cool the battery 501, as provided in an embodiment of this application.

[0082] The first and second ports of the four-way valve 105 on the battery cooling circuit are opened, the first and third ports of the third three-way valve 103 on the battery cooling circuit are opened, and the battery circuit radiator 401, the second fan 402, the third electronic water pump 601 and the fourth electronic water pump 602 on the battery 501 cooling circuit are turned on to provide cooling through the battery circuit radiator 401. The cooling is then driven by the third electronic water pump 601 and the fourth electronic water pump 602 to flow through the battery 501 and absorb the heat of the battery 501, so as to cool the battery 501 through the battery circuit radiator 401.

[0083] S303. When the temperature of the electric drive 502 is lower than the temperature of the battery 501, the battery 501 is cooled by the electric drive circuit heat sink 407.

[0084] Figure 12 This is a schematic diagram of a thermal management system structure that uses an electrically driven circuit radiator 407 to cool the battery 501, as provided in an embodiment of this application.

[0085] The third port of the third three-way valve 103 is closed, and the battery circuit radiator 401 and the third electronic water pump 601 are closed. At the same time, all ports of the four-way valve 105 are opened, the second port of the third three-way valve 103 is opened, the electric drive circuit radiator 407, the third fan 408 and the fifth electronic water pump 603 of the electric drive cooling circuit are turned on, and the first and second ports of the fourth three-way valve 104 are opened to provide cooling through the electric drive circuit radiator 407. The cooling is then driven by the fifth electronic water pump 603 to flow through the four-way valve 105, the third three-way valve 103 and the fourth electronic water pump 602 on the electric drive cooling circuit to flow through the battery 501 and absorb the heat of the battery 501, so as to cool the battery 501 through the electric drive circuit radiator 407.

[0086] S304. When neither the battery circuit radiator 401 nor the electric drive circuit radiator 407 can meet the cooling requirements of the battery 501, the battery 501 is cooled by the battery cooler 802.

[0087] Figure 13This is a schematic diagram of the thermal management system structure that uses a battery cooler 802 to cool the battery 501, as provided in an embodiment of this application.

[0088] The third and fourth ports of the four-way valve 105 are closed, the fourth three-way valve 104 is closed, the electric drive circuit radiator 407 and the third fan 408 are closed, the fifth electronic water pump 603 and the fourth three-way valve 104 are closed, and the heat pump four-way reversing valve 202 and the electronic expansion valve 205 on the cabin cooling circuit are opened. The compressor, battery cooler 802 and the first electronic water pump on the battery heating circuit are opened, the first and second ports of the four-way valve 105 are opened, and the first and second ports of the third three-way valve 103 are opened to cool the battery 501 through the battery cooler 802.

[0089] Also includes: Figure 14 The flowchart provided in this application embodiment shows the cooling process for the electrically driven 502.

[0090] S401, Identify whether the vehicle's electric drive 502 requires cooling.

[0091] S402. If the electric drive 502 has a cooling requirement, the electric drive 502 will be cooled by the heat sink 407 of the electric drive circuit.

[0092] The electric drive circuit radiator 407, the third fan 408 and the fifth electric water pump 603 are turned on, and the fourth three-way valve 104 is turned on, so that the electric drive circuit radiator 407 provides cooling capacity, so that the cooling capacity flows through the fifth electric water pump 603 and the four-way valve 105 through the electric drive 502 and absorbs the heat of the electric drive 502, so as to cool the electric drive 502 through the electric drive circuit radiator 407.

[0093] S403. When the temperature of the electric drive 502 is lower than the temperature of the battery 501, the cooling capacity of the electric drive 502 is jointly provided by the battery circuit heat sink 401 and the electric drive circuit heat sink 407.

[0094] Figure 15 This is a schematic diagram of a thermal management system structure that uses a battery circuit radiator 401 and an electric drive circuit radiator 407 to cool the battery 501, as provided in an embodiment of this application.

[0095] All ports of the four-way valve 105 are opened, the first and third ports of the third three-way valve 103 on the battery cooling circuit are opened, and the battery circuit radiator 401, the second fan 402, the third electronic water pump 601 and the fourth electronic water pump 602 are turned on, so that the battery circuit radiator 401 and the electric drive circuit radiator 407 can jointly provide cooling for the electric drive 502.

[0096] In one possible embodiment of this application, if the engine 503 has a cooling requirement, the engine radiator 405 is activated to cool the engine.

[0097] The pressure switch 701 can be used to automatically adjust the pressure in the system to maintain the stable operation of the system. The first expansion tank 702, the second expansion tank 703 and the third expansion tank 704 are used in the thermal management control system to deal with water volume expansion and pressure fluctuations caused by temperature changes, and can prevent water pipe rupture or equipment damage caused by water volume expansion.

[0098] Compared to other technologies, this application's software architecture comprehensively considers various operating conditions and usage scenarios of the vehicle, formulates relevant control strategies based on the priority of energy utilization, and thus determines the priority of system component startup; based on the overall vehicle requirements, software functions are selectively enabled or disabled through calibrated quantities, thereby improving the applicability of the software architecture.

[0099] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0100] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0101] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0102] In addition, the functional units in the various embodiments of this application 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.

[0103] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0104] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, 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 covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A thermal management control method of a vehicle, characterized by, The method comprises: identifying whether the battery of the vehicle has a heating demand; if the battery has a heating demand, identifying the working state of the power source of the vehicle, and determining whether the vehicle meets the waste heat heating condition according to the identified working state; if the waste heat heating condition is met, using the waste heat of the power source to heat the battery; if the waste heat heating condition is not met, determining whether the start condition of starting the heat pump system of the vehicle is met according to the ambient temperature of the vehicle; if the start condition is met, starting the evaporator in the heat pump system to heat the battery; if the start condition is not met, starting the battery loop PTC and water heating WPTC of the vehicle to heat the battery, wherein the method further comprises: identifying whether the battery has a cooling demand; if the battery has a cooling demand, controlling the first port and the second port of the four-way valve on the battery cooling loop to be conductive, controlling the first port and the third port of the third three-way valve on the battery cooling loop to be conductive, and controlling the battery loop radiator, the second fan, the third electronic water pump and the fourth electronic water pump on the battery cooling loop to be turned on to provide cold energy through the battery loop radiator, so that the cold energy flows through the battery driven by the third electronic water pump and the fourth electronic water pump and absorbs the heat of the battery, to cool the battery through the battery loop radiator; when the temperature of the electric drive is lower than the temperature of the battery, controlling the third port of the third three-way valve to be closed, and controlling the battery loop radiator and the third electronic water pump to be closed, while controlling all ports of the four-way valve to be conductive, controlling the second port of the third three-way valve to be conductive, controlling the electric drive loop radiator, the third fan and the fifth electronic water pump of the electric drive cooling loop to be turned on, and controlling the first port and the second port of the fourth three-way valve to be conductive to provide cold energy through the electric drive loop radiator, so that the cold energy flows through the four-way valve, the third three-way valve and the fourth electronic water pump on the electric drive cooling loop driven by the fifth electronic water pump, flows through the battery and absorbs the heat of the battery, to cool the battery through the electric drive loop radiator; when neither the battery loop radiator nor the electric drive loop radiator can meet the cooling demand of the battery, controlling the third port and the fourth port of the four-way valve to be closed, controlling the fourth three-way valve to be closed, controlling the electric drive loop radiator and the third fan to be closed, controlling the fifth electronic water pump and the fourth three-way valve to be closed, and controlling the heat pump four-way reversing valve and the electronic expansion valve on the cabin cooling loop to be conductive, controlling the compressor, the battery cooler and the first electronic water pump on the battery cooling loop to be turned on, controlling the first port and the second port of the four-way valve to be conductive, and controlling the first port and the second port of the third three-way valve to be conductive to cool the battery through the battery cooler.

2. The method of claim 1, wherein, The power source comprises an engine and an electric drive, and the waste heat heating condition comprises a first waste heat heating condition and a second waste heat heating condition, wherein further comprising: when the working state of the engine is the running state, it is determined that the vehicle satisfies the first waste heat heating condition, so as to heat the battery by using the waste heat of the engine; when the working state of the electric drive is the running state, it is determined that the vehicle satisfies the second waste heat heating condition, so as to heat the battery by using the waste heat of the electric drive.

3. The method of claim 2, wherein, The waste heat of the engine is used to heat the battery by the following method: when the vehicle satisfies the first waste heat heating condition, the first port and the second port of the first three-way valve on the engine heating circuit are controlled to be conducted, the first port and the second port of the second three-way valve on the engine heating circuit are controlled to be conducted, and the warm air cut-off valve on the engine heating circuit is controlled to be conducted, so as to heat the engine heating circuit by the waste heat of the engine, so that the heat in the engine heating circuit enters the plate heat exchanger arranged on the engine heating circuit through the second three-way valve and the warm air cut-off valve, and meanwhile, the first port and the second port of the four-way valve on the battery heating circuit are controlled to be conducted, the first port and the second port of the third three-way valve on the battery heating circuit are controlled to be conducted, so that the heat in the plate heat exchanger provides heat for the battery through the battery heating circuit, so as to heat the battery by the waste heat of the engine.

4. The method of claim 2, wherein, The waste heat of the electric drive is used to heat the battery by the following method: the first port and the second port of the third three-way valve on the battery heating circuit are controlled to be conducted, all the ports of the four-way valve on the battery heating circuit are controlled to be conducted, and the first port and the second port of the fourth three-way valve on the electric drive heating circuit are controlled to be conducted, so as to heat the electric drive heating circuit by the waste heat of the electric drive, so that the heat in the electric drive heating circuit enters the plate heat exchanger arranged on the engine heating circuit through the fourth three-way valve, the four-way valve and the third three-way valve, so that the heat in the plate heat exchanger provides heat for the battery through the battery heating circuit, so as to heat the battery by the waste heat of the electric drive.

5. The method of claim 2, wherein, Further comprising: in response to a heating request for the passenger cabin of the vehicle, identifying the working state of the engine of the vehicle, and judging whether the vehicle satisfies the first waste heat heating condition according to the identified working state; if the first waste heat heating condition is satisfied, the warm air cut-off valve on the engine heating circuit is controlled to be conducted, the first port and the third port of the first three-way valve on the engine heating circuit are controlled to be conducted, the first port and the second port of the second three-way valve on the engine heating circuit are controlled to be conducted, so as to heat the engine heating circuit by the waste heat of the engine, so that the heat in the engine heating circuit enters the HVAC cabin warm air core arranged on the engine heating circuit through the second three-way valve and the warm air cut-off valve, so as to heat the passenger cabin by the waste heat of the engine; if the engine waste heat heating condition is not satisfied, it is determined whether the vehicle satisfies the starting condition, which indicates that the ambient temperature of the vehicle is within a preset temperature range; If the starting condition is met, a four-way reversing valve on a passenger cabin heating circuit is controlled to be turned on, an evaporator on the passenger cabin heating circuit is controlled to be started, a passenger cabin refrigeration stop valve on the passenger cabin heating circuit is controlled to be turned on, and a thermal expansion valve on the passenger cabin heating circuit is controlled to be turned on, so that the evaporator is heated to make heat generated by the evaporator enter a heater core in the HVAC cabin through the passenger cabin refrigeration stop valve and the thermal expansion valve, and the passenger cabin is heated by the evaporator. If the starting condition is not met, a PTC for air heating and a WPTC for water heating of the vehicle are started to heat the passenger cabin.

6. The method of claim 1, wherein, The step of starting the PTC and the WPTC for water heating of the vehicle to heat the battery includes: The first port and the second port of a four-way valve on the battery heating circuit are controlled to be turned on, the first port and the second port of a third three-way valve on the battery heating circuit are controlled to be turned on, a first electronic water pump and the PTC on the battery circuit are controlled to be turned on, so that heat provided by the PTC on the battery circuit flows through the battery to heat the battery. When receiving an instruction to turn on the WPTC for water heating, the WPTC for water heating and a second electronic water pump on the water heating circuit are controlled to be turned on, the first port and the second port of a first three-way valve on the engine heating circuit are controlled to be turned on, the first port and the second port of a second three-way valve are controlled to be turned on, and a heater stop valve is controlled to be turned on, so that the WPTC for water heating and the PTC on the battery circuit heat the battery together.

7. The method of claim 1, wherein, Further comprising: In response to a refrigeration demand of a passenger cabin of the vehicle, an HVAC cabin evaporator, a first fan, a compressor and a condenser on a passenger cabin cooling circuit are controlled to be turned on, a four-way reversing valve, a passenger cabin refrigeration stop valve and a thermal expansion valve on the passenger cabin cooling circuit are controlled to be turned on, so that refrigerant is compressed and condensed by the four-way reversing valve, the compressor and the condenser to obtain liquid refrigerant, the liquid refrigerant enters the HVAC cabin evaporator through adjustment of the thermal expansion valve, and the first fan blows air cooled in the HVAC cabin evaporator into the passenger cabin to provide cold energy to the passenger cabin.

8. The method of claim 1, wherein, Further comprising: It is identified whether the electric drive of the vehicle has a refrigeration demand. If the electric drive has a refrigeration demand, an electric drive circuit radiator, a third fan and a fifth electronic water pump on an electric drive cooling circuit are controlled to be turned on, and a fourth three-way valve is controlled to be turned on, so that cold energy is provided by the electric drive circuit radiator, the cold energy flows through the electric drive through the fifth electronic water pump and the four-way valve on the electric drive cooling circuit to absorb heat of the electric drive, and the electric drive is refrigerated by the electric drive circuit radiator. When the temperature of the electric drive is lower than the temperature of the battery, all ports of the four-way valve are controlled to be open, the first port and the third port of the third three-way valve on the battery cooling circuit are controlled to be open, and the battery circuit radiator, the second fan, the third electronic water pump and the fourth electronic water pump on the battery cooling circuit are controlled to be turned on, so as to provide cold energy for the electric drive refrigeration through the battery circuit radiator and the electric drive circuit radiator.

9. A thermal management control system of a vehicle, characterized by, The system comprises: a battery; a power source configured to heat the battery using waste heat when the vehicle meets a waste heat heating condition; an evaporator configured to heat the battery when the vehicle meets a starting condition; a battery circuit PTC configured to heat the battery when the vehicle does not meet the starting condition; a water heating and electric heating WPTC configured to heat the battery when the vehicle does not meet the starting condition; a controller configured to: identify whether the battery of the vehicle has a heating demand; if the battery has a heating demand, identify the working state of the power source of the vehicle, and determine whether the vehicle meets the waste heat heating condition according to the identified working state; if the waste heat heating condition is met, heat the battery using the waste heat of the power source; if the waste heat heating condition is not met, determine whether the starting condition of the heat pump system of the vehicle is met according to the ambient temperature of the vehicle; if the starting condition is met, start the evaporator in the heat pump system to heat the battery; if the starting condition is not met, start the battery circuit PTC and the water heating and electric heating WPTC of the vehicle to heat the battery. The controller is further configured to: identify whether the battery has a refrigeration requirement; if the battery has a refrigeration requirement, control the first port and the second port of a four-way valve on the battery cooling circuit to be conductive, control the first port and the third port of a third three-way valve on the battery cooling circuit to be conductive, and control the battery circuit radiator, the second fan, the third electronic water pump and the fourth electronic water pump on the battery cooling circuit to be turned on, to provide cold energy through the battery circuit radiator, so that the cold energy flows through the battery by driving of the third electronic water pump and the fourth electronic water pump and absorbs heat of the battery, to refrigerate the battery through the battery circuit radiator; when the temperature of the electric drive is lower than the temperature of the battery, control the third port of the third three-way valve to be closed, and control the battery circuit radiator and the third electronic water pump to be turned off, while controlling all ports of the four-way valve to be conductive, controlling the second port of the third three-way valve to be conductive, controlling the electric drive circuit radiator, the third fan and the fifth electronic water pump of the electric drive cooling circuit to be turned on, and controlling the first port and the second port of the fourth three-way valve to be conductive, to provide cold energy through the electric drive circuit radiator, so that the cold energy flows through the four-way valve, the third three-way valve and the fourth electronic water pump on the electric drive cooling circuit by driving of the fifth electronic water pump, flows through the battery and absorbs heat of the battery, to refrigerate the battery through the electric drive circuit radiator; when the battery circuit radiator and the electric drive circuit radiator cannot meet the refrigeration requirement of the battery, control the third port and the fourth port of the four-way valve to be closed, control the fourth three-way valve to be closed, control the electric drive circuit radiator and the third fan to be turned off, control the fifth electronic water pump and the fourth three-way valve to be closed, and control the heat pump four-way reversing valve and the electronic expansion valve on the cabin cooling circuit to be conductive, control the compressor, the battery cooler and the first electronic water pump on the battery cooling circuit to be turned on, control the first port and the second port of the four-way valve to be conductive, and control the first port and the second port of the third three-way valve to be conductive, to refrigerate the battery through the battery cooler.

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