An integrated thermal management system for automobiles and its method

Abstract

This invention discloses an integrated thermal management system and method for automobiles. The water-side integrated module includes a heat exchanger, a first four-way reversing valve, a cooler, and a second coolant reservoir. The four outlets of the first four-way reversing valve are respectively connected to the heat medium outlet of the air conditioning system, the engine cooling system, the heat exchanger, and the PTC inlet of the air conditioning system. The heat exchanger is also connected to the cooler, the battery, and the PTC outlet of the air conditioning system. The cooler is also connected to the second coolant reservoir and the refrigerant inlet and outlet of the air conditioning system. The second coolant reservoir is also connected to the battery. The engine cooling system, the air conditioning system, and the low-temperature cooling system exchange heat sequentially. The low-temperature cooling system also exchanges heat with the external environment through the air intake grille. A temperature acquisition module is used to acquire the coolant temperature and the intake air temperature at the air intake grille in the integrated thermal management system. This method optimizes the piping composition of the thermal management system and reduces wind resistance while meeting the overall vehicle thermal management requirements.

Description

Technical Field

[0001] This application relates to the field of vehicle thermal management technology, and in particular to an integrated thermal management system and method for automobiles. Background Technology

[0002] For gasoline-powered vehicles, the engine heat load is relatively high, making AGS (Intelligent Grille System) generally unsuitable. Pure electric vehicles have lower heat loads, so AGS is used less frequently. Range-extended electric vehicles combine the cooling and heating needs of the engine, battery, and multi-functional electric drive system while also ensuring passenger cabin comfort.

[0003] The thermal management system of a range-extended electric vehicle includes components such as the engine, battery, electric heater, heat pump, motor, six-in-one assembly, autopilot controller, and electric water pump. It not only needs to provide cooling and heating for the passenger compartment but also manage the temperature of components such as the engine, battery, motor, six-in-one assembly, and autopilot controller. Furthermore, to provide users with greater economic benefits and extend the driving range, it needs to frequently switch operating modes to facilitate heat exchange between different components.

[0004] In current range-extended electric vehicles, the engine cooling system, battery thermal management, and the heating and cooling of the passenger compartment in a six-in-one thermal management system are all independent modules. This results in a complex pipeline for the entire vehicle's thermal management system, increasing the vehicle's size and weight, and affecting the heat exchange efficiency of each module. At the same time, current thermal management systems cannot reduce the vehicle's wind resistance by adjusting the opening of the air intake grille while meeting the overall vehicle thermal management requirements. Summary of the Invention

[0005] In view of this, this application provides an integrated thermal management system and method for automobiles, which can optimize the piping composition of the thermal management system and reduce wind resistance while meeting the thermal management requirements of the whole vehicle.

[0006] Specifically, the following technical solutions are included:

[0007] This application provides an integrated thermal management system for an automobile, including: an air intake grille, a water-side integrated module, an engine cooling system, a battery, a low-temperature cooling system, an air conditioning system, and a temperature acquisition module;

[0008] The water-side integrated module includes a heat exchanger, a first four-way reversing valve, a cooler, and a second water tank. The four outlets of the first four-way reversing valve are respectively connected to the heat medium outlet of the air conditioning system, the engine cooling system, the heat exchanger, and the PTC inlet of the air conditioning system. The heat exchanger is also connected to the cooler, the battery, and the PTC outlet of the air conditioning system. The cooler is also connected to the second water tank and the refrigerant inlet and outlet of the air conditioning system. The second water tank is also connected to the battery. The engine cooling system, the air conditioning system, and the low-temperature cooling system exchange heat sequentially. The low-temperature cooling system also exchanges heat with the external environment through the air intake grille.

[0009] The temperature acquisition module is used to acquire the coolant temperature and the intake air temperature at the intake grille in the integrated thermal management system.

[0010] In one optional embodiment, the air conditioning system includes a PTC, a refrigerant inlet, a refrigerant outlet, a heat transfer fluid outlet, a heating pipe, a cooling pipe, a compressor, and a condenser; the PTC inlet is connected to a first four-way reversing valve and an engine cooling system outlet; the PTC outlet is connected to a heating pipe and a heat exchanger, and the heating pipe is connected to the heat transfer fluid outlet; the heat transfer fluid outlet is connected to the first four-way reversing valve; the cooling pipe is connected to the refrigerant inlet and the refrigerant outlet, the refrigerant outlet is connected to the compressor, the compressor is connected to the condenser, and the condenser is connected to the refrigerant inlet; the refrigerant inlet and the refrigerant outlet are also connected to the condenser.

[0011] In an optional embodiment, the engine cooling system outlet is connected to the PTC inlet via an engine outlet pipe, and the engine outlet pipe is connected to one outlet of a first four-way reversing valve.

[0012] In an optional embodiment, the engine cooling system includes an engine cooling system inlet, a high-temperature radiator, an engine cooling system outlet, and a second four-way reversing valve; the three outlets of the second four-way reversing valve are respectively connected to the engine cooling system inlet, the high-temperature radiator outlet, and the engine cooling system outlet; the inlet of the high-temperature radiator is also connected to the engine cooling system inlet.

[0013] In an optional embodiment, the cryogenic cooling system includes a cryogenic radiator that exchanges heat with the external environment through an air intake grille, the condenser of the air conditioning system exchanges heat with the cryogenic radiator, and the high-temperature radiator of the engine cooling system exchanges heat with the condenser; the cryogenic radiator is connected to functional components.

[0014] In an optional embodiment, the integrated thermal management system includes a first cooling circuit, a second cooling circuit, and a third cooling circuit;

[0015] With the first cooling circuit open, the air conditioning system's refrigeration circuit is open;

[0016] With the second cooling circuit connected, the circuit between the condenser and cooler of the air conditioning system is connected, as are the circuits between the heat exchanger, battery, second kettle and cooler.

[0017] With the third cooling circuit connected, the air conditioning system's refrigeration circuit is connected, the circuit between the air conditioning system's condenser and cooler is connected, and the circuit between the heat exchanger, battery, second kettle, and cooler is connected.

[0018] In an optional embodiment, the integrated thermal management system includes a first heating circuit, a second heating circuit, a third heating circuit, a fourth heating circuit, a fifth heating circuit, a sixth heating circuit, a seventh heating circuit, and an eighth heating circuit.

[0019] With the first heating circuit connected, the circuit between the engine cooling system and the heat exchanger is connected, as are the circuits between the heat exchanger, the battery, the second water tank, and the cooler.

[0020] With the second heating circuit connected, the circuit between the engine cooling system and the air conditioning system heat transfer outlet is connected.

[0021] With the third heating circuit in operation, the circuit between the engine cooling system and the heat medium outlet of the air conditioning system is in operation, the circuit between the engine cooling system and the heat exchanger is in operation, and the circuit between the heat exchanger, the battery, the second water tank and the cooler is in operation.

[0022] With the fourth heating circuit connected, the circuit between the PTC and the heat exchanger of the air conditioning system is connected, as are the circuits between the heat exchanger, the battery, the second kettle, and the cooler.

[0023] With the fifth heating circuit connected, the circuit between the PTC and the heat exchanger in the air conditioning system is connected.

[0024] With the sixth heating circuit connected, the circuit between the PTC and the heat exchanger of the air conditioning system is connected, the circuit between the heat medium outlet of the air conditioning system and the PTC is connected, and the circuit between the heat exchanger, the battery, the second kettle and the cooler is connected.

[0025] With the seventh heating circuit in operation, the circuit between the engine cooling system and the heat exchanger is in operation, the circuit between the PTC of the air conditioning system and the heat exchanger is in operation, and the circuit between the heat exchanger, the battery, the second water tank and the cooler is in operation.

[0026] With the eighth heating circuit connected, the circuit between the engine cooling system and the heat medium outlet of the air conditioning system is connected, the circuit between the PTC of the air conditioning system and the heat exchanger is connected, and the circuit between the heat exchanger, the battery, the second water tank and the cooler is connected.

[0027] In an optional embodiment, the first four-way directional valve has a first state, a second state, a third state, a fourth state, a fifth state, a sixth state, a seventh state, an eighth state, and a ninth state.

[0028] In the first state, the heat exchanger is connected to the engine cooling system inlet via the first four-way reversing valve;

[0029] In the second state, the heat medium outlet of the air conditioning system is connected to the inlet of the engine cooling system through the first four-way reversing valve;

[0030] In the third state, the heat medium outlet of the air conditioning system is connected to the engine cooling system inlet through the first four-way reversing valve, and the heat exchanger is connected to the engine cooling system inlet through the first four-way reversing valve.

[0031] In the fourth state, the heat exchanger is connected to the PTC inlet through the first four-way reversing valve;

[0032] In the fifth state, the heat medium outlet of the air conditioning system is connected to the PTC inlet through the first four-way reversing valve;

[0033] In the sixth state, the heat medium outlet of the air conditioning system is connected to the PTC inlet through the first four-way reversing valve, and the heat exchanger is connected to the PTC inlet through the first four-way reversing valve.

[0034] In the seventh state, the heat exchanger is connected to the engine cooling system inlet through the first four-way reversing valve, and the heat medium outlet of the air conditioning system is connected to the PTC inlet through the first four-way reversing valve.

[0035] In the eighth state, the heat medium outlet of the air conditioning system is connected to the engine cooling system inlet through the first four-way reversing valve, and the heat exchanger is connected to the PTC inlet through the first four-way reversing valve.

[0036] In the ninth state, the ports of the first four-way directional valve are not connected to each other.

[0037] This application also provides a thermal management method for an integrated thermal management system of an automobile, including:

[0038] Acquire vehicle air conditioning high-pressure parameters, vehicle gear information, vehicle speed information, ambient temperature, coolant temperature in the integrated thermal management system, and air intake temperature at the air intake grille;

[0039] When the vehicle is in neutral (N) and the vehicle speed is greater than 0, or the ambient temperature is less than or equal to 0, or the coolant temperature is less than the set water temperature and the intake air temperature is less than the set intake air temperature, and the electronic accelerator control is in the off state for a duration greater than or equal to the set time, the intake grille is fully closed.

[0040] When the vehicle speed is less than or equal to the set speed and the duration is greater than or equal to the set time, or the coolant temperature is greater than or equal to the set water temperature, or the intake air temperature is greater than or equal to the set intake air temperature, or the electronic accelerometer control is in the on state, or the air conditioning high pressure parameter is greater than the set parameter, the air intake grille is fully opened.

[0041] In an optional embodiment, when the ambient temperature is higher than a set ambient temperature when the vehicle is powered off, the air intake grille is controlled to open fully.

[0042] When the vehicle is powered off, if the ambient temperature is less than or equal to the set ambient temperature, the air intake grille will close.

[0043] The beneficial effects of the technical solution provided in this application embodiment include at least the following: by integrating the engine cooling system, battery, low-temperature cooling system and air conditioning system together through a water-side integrated module, the number of components in the thermal management system is reduced while each cooling system and air conditioning system are operating normally, thereby reducing the number of external pipes between the components and avoiding system energy loss caused by too many or too long external pipes. This helps to improve the heat exchange efficiency of the thermal management system. At the same time, by detecting the coolant temperature, vehicle speed, ambient temperature, gear position and intake air temperature at the intake grille in the thermal management system, the opening and closing of the intake grille is controlled. While meeting the thermal management requirements of the whole vehicle, the wind resistance of the whole vehicle is reduced by adjusting the opening of the intake grille. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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 the integrated thermal management system provided in the embodiments of this application;

[0046] Figure 2 A schematic diagram of the integrated thermal management system provided in the embodiments of this application in a first operating mode;

[0047] Figure 3 A schematic diagram of the integrated thermal management system provided in the embodiments of this application in a second operating mode;

[0048] Figure 4 A schematic diagram of the integrated thermal management system provided in the embodiments of this application in a third working mode;

[0049] Figure 5 A schematic diagram of the integrated thermal management system provided in the embodiments of this application in the fourth working mode;

[0050] Figure 6 A schematic diagram of the integrated thermal management system provided in the embodiments of this application in the fifth working mode;

[0051] Figure 7 A schematic diagram of the integrated thermal management system provided in the embodiments of this application in the sixth working mode;

[0052] Figure 8 A schematic diagram of the integrated thermal management system provided in the embodiments of this application in the seventh working mode;

[0053] Figure 9 A schematic diagram of the integrated thermal management system provided in the embodiments of this application in the eighth working mode;

[0054] Figure 10 A schematic diagram of the integrated thermal management system provided in the embodiments of this application in the ninth working mode;

[0055] Figure 11 A schematic diagram of the integrated thermal management system provided in the embodiments of this application in the tenth working mode;

[0056] Figure 12 A schematic diagram of the integrated thermal management system provided in the embodiments of this application in the eleventh operating mode;

[0057] Figure 13 A schematic diagram of the water-side integrated module of the integrated thermal management system provided in this application embodiment;

[0058] Figure 14 Safety protection strategies for the integrated thermal management system provided in the embodiments of this application;

[0059] Figure 15 The AGS power-off control strategy in the integrated thermal management system provided in the embodiments of this application;

[0060] Figure 16 The control strategy for AGS power-on in the integrated thermal management system provided in the embodiments of this application.

[0061] The reference numerals in the figure are respectively:

[0062] 1-Air intake grille; 2-Low-temperature radiator; 3-Condenser; 4-High-temperature radiator; 5-Cooling fan; 6-Water pump; 7-Three-way valve; 8-Compressor; 9-Throttle valve; 10-Throttle valve; 11-Generator oil cooler; 12-Generator; 13-Throttle valve; 14-Multi-function electric drive; 15-Autopilot controller; 16-Engine; 17-Thermostat; 18-Water-side integrated module; 19-PTC; 20-Battery; 21-HVAC; 22-Electronic expansion valve.

[0063] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0064] 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0065] In the embodiments of this application, directional terms such as "upper," "lower," and "side" are generally used in the following ways: Figure 1 The relative positions shown are based on the given information, and these directional terms are used only to more clearly describe the relationships between structures, not to describe absolute positions. Positions may change when the product is placed in different orientations; for example, "up" and "down" may be interchanged.

[0066] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by those skilled in the art. Some technical terms appearing in the embodiments of this application are described below.

[0067] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0068] This application provides an integrated thermal management system for automobiles, applicable to range-extended electric vehicles.

[0069] like Figure 1 As shown, the integrated thermal management system includes an air intake grille 1, a water-side integrated module 18, an engine cooling system, a battery 20, a low-temperature cooling system, an air conditioning system, and a temperature acquisition module.

[0070] like Figure 13As shown, the water-side integrated module 18 includes a heat exchanger (CC), a first four-way reversing valve, a cooler, and a second water tank (Tank2). The four outlets of the first four-way reversing valve are respectively connected to the heat medium outlet of the air conditioning system, the engine cooling system, the heat exchanger, and the PTC inlet of the air conditioning system. The heat exchanger is also connected to the cooler, the battery, and the PTC outlet of the air conditioning system. The cooler is also connected to the second water tank and the refrigerant inlet and outlet of the air conditioning system. The second water tank is also connected to the battery 20. The engine cooling system, the air conditioning system, and the low-temperature cooling system exchange heat sequentially. The low-temperature cooling system also exchanges heat with the external environment through the air intake grille 1.

[0071] The temperature acquisition module is used to acquire the coolant temperature and the intake air temperature at the intake grille in the integrated thermal management system.

[0072] The integrated thermal management system has a water circulation system and an air conditioning system. The coolant flows in the water circulation system and exchanges heat with the battery, engine and various functional components, thereby cooling or heating the battery, engine and various functional components.

[0073] Air conditioning refrigerant flows in the air conditioning system circuit to cool the entire vehicle; water coolant flows in the air conditioning circuit to heat the entire vehicle, thus regulating the air in the passenger compartment.

[0074] The first four-way reversing valve is used to change the flow direction of the coolant, thereby switching the operating mode of the thermal management system.

[0075] For example, the air conditioning system includes a PTC19, a refrigerant inlet, a refrigerant outlet, a heat transfer outlet, a heating element (HEAT), a cooling element (EVAP), a compressor 8, and a condenser (COND) 3; the PTC inlet is connected to a first four-way reversing valve and the engine cooling system outlet respectively; the PTC outlet is connected to the heating element and the heat exchanger respectively, and the heating element is connected to the heat transfer outlet; the heat transfer outlet is connected to the first four-way reversing valve; the cooling element is connected to the refrigerant inlet and the refrigerant outlet respectively, the refrigerant outlet is connected to the compressor 8, the compressor 8 is connected to the condenser 3, and the condenser 3 is connected to the refrigerant inlet; the refrigerant inlet and the refrigerant outlet are also connected to the condenser.

[0076] The heating element (HEAT) and cooling element (EVAP) together form the HVAC system 21.

[0077] For example, an electronic expansion valve 22 and a PT sensor are also provided on the connecting pipe between the condenser 3 and the refrigerant inlet.

[0078] An electronic expansion valve is installed on the connecting pipe between the refrigerant inlet and the cooler; a PT sensor is installed on the connecting pipe between the cooler and the refrigerant outlet.

[0079] For example, the engine cooling system outlet is connected to the PTC inlet via an engine outlet pipe, and the engine outlet pipe is connected to one outlet of the first four-way reversing valve. The engine 16 is cooled by the engine cooling system, and the cooled coolant participates in the temperature regulation of the battery and the passenger compartment.

[0080] For example, the engine cooling system includes an engine cooling system inlet, a high-temperature radiator (HTR) 4, an engine cooling system outlet, and a second four-way reversing valve; the three outlets of the second four-way reversing valve are respectively connected to the engine cooling system inlet, the high-temperature radiator outlet, and the engine cooling system outlet; the high-temperature radiator inlet is also connected to the engine cooling system inlet, and the engine cooling system outlet is connected to the PTC inlet.

[0081] A cooling fan 5 is also installed at the high-temperature radiator 4. The cooling fan 5 blows the heat from the high-temperature radiator 4 into the crew compartment to heat up or cool down the crew compartment.

[0082] The low-temperature cooling system includes a low-temperature radiator (LTR) 2, which exchanges heat with the external environment through the air intake grille 1. The condenser 3 of the air conditioning system exchanges heat with the low-temperature radiator 2, and the high-temperature radiator 4 of the engine cooling system exchanges heat with the condenser 3. The low-temperature radiator 2 is connected to the functional components and cools each functional component through the low-temperature cooling system.

[0083] For example, functional component 2 includes an autonomous driving controller (MDC) 15, an all-in-one electric drive 14, a generator 12, and a generator oil cooler 11. The all-in-one electric drive 14 refers to an on-board charging and distribution assembly that integrates six components: an on-board charger (OBC), an on-board DC / DC converter, and a power distribution unit (PDU).

[0084] The outlet of the low-temperature radiator 2 is connected to the inlet of the multi-function electric drive 14, the generator 12 and the generator oil cooler 11 respectively. The outlets of the multi-function electric drive 14, the generator 12 and the generator oil cooler 11 are connected to the main pipeline. The main pipeline is connected to the inlet of the low-temperature radiator 2. The autopilot controller (MDC) 15 exchanges heat with the multi-function electric drive 14 and the main pipeline.

[0085] For example, throttle valves 13, 10, and 9 are respectively installed on the pipelines connecting the outlets of the multi-function electric drive 14, generator 12, and generator oil cooler 11 to the main pipeline. A water pump 6 is installed on the main pipeline to drive the circulation of coolant in the low-temperature cooling system. The outlets of the multi-function electric drive 14, generator 12, and generator oil cooler 11 are connected to the main pipeline via branch pipelines and three-way valves 7.

[0086] For example, the water-side integrated module 18 also includes a first coolant tank (Tank1), which is connected to the last outlet of the second four-way reversing valve, and a thermostat (TC) 17 is provided on the connecting pipe between the first coolant tank and the second four-way reversing valve. The first coolant tank (Tank1) replenishes the engine cooling system with coolant.

[0087] For example, the integrated thermal management system includes a first cooling circuit, a second cooling circuit, and a third cooling circuit; when the ambient temperature is ≥45°C, in both the engine-driven generator charging mode and the pure electric mode, the first cooling circuit is activated when the battery needs to be cooled; when the ambient temperature is ≥45°C, in both the engine-driven generator charging mode and the pure electric mode, the second cooling circuit is activated; when the ambient temperature is greater than 25°C and less than 45°C, in both the engine-driven generator charging mode and the pure electric mode, the third cooling circuit is activated when both the battery and the passenger compartment need to be cooled.

[0088] like Figure 10 As shown, when the first cooling circuit is open, the refrigeration circuit of the air conditioning system is open, that is, the electronic expansion valve 22 is open, and the connecting pipes between the condenser outlet and the cooling pipe, between the cooling pipe and the compressor, and between the compressor and the condenser inlet are open. The refrigerant in the condenser enters the cooling pipe, exchanges heat with the passenger compartment in the cooling pipe, and then enters the compressor. After passing through the compressor, it returns to the condenser. The condenser exchanges heat with the low-temperature radiator, and the low-temperature radiator exchanges heat with the external environment through the air intake grille, thereby achieving the cooling of the passenger compartment through the air conditioning system.

[0089] like Figure 11 As shown, with the second cooling circuit open, the circuit between the condenser and cooler of the air conditioning system is open, as are the circuits between the heat exchanger, battery, second kettle, and cooler. Specifically, the connecting pipes between the condenser outlet and cooler inlet, between the cooler outlet and condenser inlet, between the heat exchanger and battery, between the battery and second kettle, between the second kettle and cooler, and between the cooler and heat exchanger are open. The refrigerant in the condenser passes through the cooler and compressor and then returns to the condenser. The coolant in the second kettle passes through the cooler, exchanges heat with the refrigerant, enters the heat exchanger, enters the battery, exchanges heat with the battery, and then returns to the second kettle, thus cooling the battery.

[0090] like Figure 12As shown, with the third cooling circuit active, the air conditioning system's refrigeration circuit is active, the circuit between the condenser and cooler is active, and the circuits between the heat exchanger, battery, second water tank, and cooler are active. Specifically, the connecting pipes between the condenser outlet and cooling pipes, between the cooling pipes and compressor, between the compressor and condenser inlet, between the condenser outlet and cooler inlet, between the cooler outlet and condenser inlet, between the heat exchanger and battery, between the battery and second water tank, between the second water tank and cooler, and between the cooler and heat exchanger are all active. The refrigerant in the condenser passes through the cooling pipes, exchanges heat with the passenger compartment in the cooling pipes, enters the compressor, and then returns to the condenser, thus cooling the passenger compartment. The refrigerant in the condenser also passes through the cooler and compressor before returning to the condenser. The coolant in the second water tank exchanges heat with the refrigerant after passing through the cooler, enters the heat exchanger, enters the battery, exchanges heat with the battery, and then returns to the second water tank, thus cooling the battery.

[0091] In an optional embodiment, the integrated thermal management system includes a first heating circuit, a second heating circuit, a third heating circuit, a fourth heating circuit, a fifth heating circuit, a sixth heating circuit, a seventh heating circuit, and an eighth heating circuit. When the ambient temperature is ≥-20°C and the engine-driven generator is replenishing power, and the engine needs to heat the battery, the first heating circuit is activated. When the ambient temperature is ≥-20°C and the engine-driven generator is replenishing power, and the engine needs to heat the passenger compartment, the second heating circuit is activated. When the ambient temperature is ≥-20°C and the engine-driven generator is replenishing power, and the engine needs to heat both the battery and the passenger compartment, the third heating circuit is activated. When the ambient temperature is ≥0°C, the engine is not running, and the system is in pure electric mode, the battery and high-voltage system can start normally, and the PCT (Power Transmission Control) is needed to heat the battery, the first heating circuit is activated. The fourth heating circuit is activated; when the ambient temperature is ≥0℃, the engine is not started, and the vehicle is in pure electric mode, the battery and high-voltage system can start normally, and the PCT is needed to heat the passenger compartment, the fifth heating circuit is activated; when the ambient temperature is ≥0℃, the engine is not started, and the vehicle is in pure electric mode, the battery and high-voltage system can start normally, and the PCT is needed to heat the battery and passenger compartment, the sixth heating circuit is activated; when the ambient temperature is less than -20℃, the vehicle is in non-pure electric mode, the battery and high-voltage system cannot start, and the engine is needed to heat the battery and the PCT is needed to heat the passenger compartment, the seventh heating circuit is activated; when the ambient temperature is less than 0℃ and greater than or equal to -20℃, the vehicle is in non-pure electric mode, the battery and high-voltage system can start but are not at the battery's optimal operating temperature, and the engine and PTC need to be connected in series to heat the battery and passenger compartment, the eighth heating circuit is activated.

[0092] like Figure 2As shown, when the first heating circuit is open, the circuit between the engine cooling system and the heat exchanger is open, as are the circuits between the heat exchanger, the battery, the second reservoir, and the cooler. Specifically, the connecting pipes between the engine cooling system outlet and the PTC, between the PTC outlet and the heat exchanger, between the heat exchanger and the first four-way reversing valve, between the first four-way reversing valve and the engine cooling system inlet, between the heat exchanger and the battery, between the battery and the second reservoir, between the second reservoir and the cooler, and between the cooler and the heat exchanger are all open. Coolant in the engine cooling system enters the heat exchanger via the PTC and then returns to the engine cooling system via the first four-way reversing valve. Coolant in the second reservoir enters the heat exchanger after passing through the cooler, exchanges heat with the coolant in the engine cooling system in the heat exchanger, and then enters the battery. After exchanging heat with the battery, it returns to the second reservoir, thus heating the battery. At this time, the PTC is not in operation.

[0093] like Figure 3 As shown, when the second heating circuit is on, the circuit between the engine cooling system and the heat medium outlet of the air conditioning system is on; that is, the connecting pipes between the engine cooling system outlet and the PTC, between the PTC and the heating pipe, between the heating pipe and the first four-way reversing valve, and between the first four-way reversing valve and the engine cooling system inlet are all on. After the coolant in the engine cooling system enters the heating pipe through the PTC, it exchanges heat with the passenger compartment through the heating pipe to heat the passenger compartment. After the heat exchange, the coolant returns to the engine cooling system through the first four-way reversing valve.

[0094] like Figure 4 As shown, with the third heating circuit active, the circuit between the engine cooling system and the air conditioning system's heat transfer medium outlet is active, the circuit between the engine cooling system and the heat exchanger is active, and the circuits between the heat exchanger, battery, second reservoir, and cooler are active; specifically, the circuits between the engine cooling system outlet and the PTC, between the PTC and the heating element, between the heating element and the first four-way reversing valve, between the first four-way reversing valve and the engine cooling system inlet, between the PTC outlet and the heat exchanger, between the heat exchanger and the first four-way reversing valve, between the heat exchanger and the battery, between the battery and the second reservoir, between the second reservoir and the cooler, and between the cooling system and the air conditioning system's heat transfer medium outlet. The connecting pipes between the cooler and the heat exchanger are all open. In the engine cooling system, the coolant enters the heating pipe through the PTC and exchanges heat with the passenger compartment through the heating pipe to heat the passenger compartment. The coolant in the engine cooling system also enters the heat exchanger through the PTC and then returns to the engine cooling system through the first four-way reversing valve. The coolant in the second reservoir enters the heat exchanger after passing through the cooler. In the heat exchanger, it exchanges heat with the coolant in the engine cooling system and then enters the battery. After exchanging heat with the battery, it returns to the second reservoir, thus achieving heating of the battery through the engine. At this time, the PTC is not working.

[0095] like Figure 5 As shown, with the fourth heating circuit connected, the circuit between the PTC and the heat exchanger in the air conditioning system is connected, as are the circuits between the heat exchanger, the battery, the second kettle, and the cooler. That is, the connecting pipes between the PTC outlet and the heat exchanger, between the heat exchanger and the first four-way reversing valve, between the first four-way reversing valve and the PTC inlet, between the heat exchanger and the battery, between the battery and the second kettle, between the second kettle and the cooler, and between the cooler and the heat exchanger are all connected. The coolant enters the heat exchanger after being heated by the PTC, and then flows out of the heat exchanger and returns to the PTC through the first four-way reversing valve. The coolant in the second kettle enters the heat exchanger after passing through the cooler. After being heated by the PTC in the heat exchanger, the coolant exchanges heat with the PTC and then enters the battery. After exchanging heat with the battery, it returns to the second kettle, thus achieving heating of the battery by the PTC.

[0096] like Figure 6 As shown, when the fifth heating circuit is on, the circuit between the PTC and the heat exchanger of the air conditioning system is on; that is, the connecting pipes between the PTC outlet and the heating pipe, between the heating pipe and the first four-way reversing valve, and between the first four-way reversing valve and the PTC inlet are all on. The coolant enters the heating pipe after being heated by the PTC, and after heat exchange with the passenger compartment through the heating pipe, it returns to the PTC through the first four-way reversing valve, thus realizing the heating of the passenger compartment through the PTC.

[0097] like Figure 7 As shown, when the sixth heating circuit is active, the circuit between the PTC and the heat exchanger in the air conditioning system is active, the circuit between the heat medium outlet and the PTC in the air conditioning system is active, and the circuits between the heat exchanger, battery, second kettle, and cooler are active; that is, the circuits between the PTC outlet and the heating element, the heating element and the first four-way reversing valve, the first four-way reversing valve and the PTC inlet, the PTC outlet and the heat exchanger, the heat exchanger and the first four-way reversing valve, the heat exchanger and the battery, the battery and the second kettle, the second kettle and the cooler, and the cooler and the heat exchanger. All connecting pipes are open. After being heated by the PTC, the coolant enters the heat exchanger and then flows out of the heat exchanger and returns to the PTC via the first four-way reversing valve. The coolant in the second reservoir enters the heat exchanger after passing through the cooler. In the heat exchanger, the coolant exchanges heat with the PTC and then enters the battery. After exchanging heat with the battery, it returns to the second reservoir, thus achieving heating of the battery by the PTC. The coolant is also heated by the PTC and then enters the heating pipe. After exchanging heat with the passenger compartment by the heating pipe, it returns to the PTC via the first four-way reversing valve, thus achieving heating of the passenger compartment by the PTC.

[0098] like Figure 8As shown, when the seventh heating circuit is on, the circuit between the engine cooling system and the heat exchanger is on, the circuit between the PTC of the air conditioning system and the heat medium outlet is on, and the circuit between the heat exchanger, the battery, the second water tank and the cooler is on. That is, the connecting pipes between the engine cooling system outlet and the PTC, between the PTC outlet and the heat exchanger, between the PTC outlet and the heating pipe, between the heat exchanger and the first four-way reversing valve, between the first four-way reversing valve and the engine cooling system inlet, between the heat exchanger and the battery, between the battery and the second reservoir, between the second reservoir and the cooler, between the cooler and the heat exchanger, and between the first four-way reversing valve and the PTC inlet are all connected. The coolant in the engine cooling system enters the heat exchanger through the PTC and then returns to the engine cooling system through the first four-way reversing valve. The coolant in the second reservoir enters the heat exchanger after passing through the cooler. In the heat exchanger, it exchanges heat with the coolant in the engine cooling system and then enters the battery. After exchanging heat with the battery, it returns to the second reservoir to heat the battery. The coolant, after being heated by the PTC, also enters the heating pipe to exchange heat with the passenger compartment to heat the passenger compartment. After that, it returns to the PTC through the first four-way reversing valve for heating.

[0099] like Figure 9 As shown, when the eighth heating circuit is active, the circuit between the engine cooling system and the air conditioning system's heat transfer medium outlet is active, the circuit between the air conditioning system's PTC and the heat exchanger is active, and the circuits between the heat exchanger, battery, second reservoir, and cooler are active. Specifically, this includes the circuits between the engine cooling system outlet and the PTC, the PTC outlet and the heat exchanger, the PTC outlet and the heating element, the heat exchanger and the first four-way reversing valve, the first four-way reversing valve and the engine cooling system inlet, the heat exchanger and the battery, the battery and the second reservoir, the second reservoir and the cooler, and the cooler and the heat exchanger. The connecting pipes between the engine cooling system, the first four-way reversing valve, and the PTC inlet are all open. After the coolant in the engine cooling system enters the heat exchanger through the PTC, it returns to the PTC through the first four-way reversing valve. The coolant in the second reservoir enters the heat exchanger after passing through the cooler. In the heat exchanger, it exchanges heat with the coolant in the engine cooling system and then enters the battery. After exchanging heat with the battery, it returns to the second reservoir to heat the battery. After being heated by the PTC, the coolant also enters the heating pipe to exchange heat with the passenger compartment to heat the passenger compartment. After that, it returns to the engine cooling system through the first four-way reversing valve.

[0100] For example, the first four-way directional valve has a first state, a second state, a third state, a fourth state, a fifth state, a sixth state, a seventh state, an eighth state, and a ninth state.

[0101] like Figure 2 As shown, in the first state, the heat exchanger is connected to the engine cooling system inlet via the first four-way reversing valve.

[0102] like Figure 3 As shown, in the second state, the heat medium outlet of the air conditioning system is connected to the engine cooling system inlet through the first four-way reversing valve.

[0103] like Figure 4 As shown, in the third state, the heat medium outlet of the air conditioning system is connected to the engine cooling system inlet through the first four-way reversing valve, and the heat exchanger is connected to the engine cooling system inlet through the first four-way reversing valve.

[0104] like Figure 5 As shown, in the fourth state, the heat exchanger is connected to the PTC inlet through the first four-way reversing valve.

[0105] like Figure 6 As shown, in the fifth state, the heat medium outlet of the air conditioning system is connected to the PTC inlet through the first four-way reversing valve.

[0106] like Figure 7 As shown, in the sixth state, the heat medium outlet of the air conditioning system is connected to the PTC inlet through the first four-way reversing valve, and the heat exchanger is connected to the PTC inlet through the first four-way reversing valve.

[0107] like Figure 8 As shown, in the seventh state, the heat exchanger is connected to the engine cooling system inlet through the first four-way reversing valve, and the heat medium outlet of the air conditioning system is connected to the PTC inlet through the first four-way reversing valve.

[0108] like Figure 9 As shown, in the eighth state, the heat medium outlet of the air conditioning system is connected to the engine cooling system inlet through the first four-way reversing valve, and the heat exchanger is connected to the PTC inlet through the first four-way reversing valve.

[0109] like Figure 10 As shown, in the ninth state, the ports of the first four-way directional valve are not connected to each other.

[0110] For example, the low-temperature radiator constantly exchanges heat with the environment outside the air intake grille and the condenser, while the high-temperature radiator constantly exchanges heat with the condenser, ensuring the normal cooling of the low-temperature cooling system and the engine cooling system.

[0111] For example, the temperature acquisition module is used to acquire the engine cooling system inlet water temperature, the water temperature before heat exchange between the low-temperature cooling system and the intake grille, the water temperature at the battery outlet and inlet, the air conditioning refrigerant inlet water temperature, and the intake air temperature at the intake grille; and select the maximum value from the engine cooling system inlet water temperature, the water temperature before heat exchange between the low-temperature cooling system and the intake grille, the water temperature at the battery outlet and inlet, and the air conditioning refrigerant inlet water temperature as the coolant temperature in the integrated thermal management system.

[0112] In order to reduce wind resistance while meeting the overall vehicle thermal management requirements; such as Figure 14 , Figure 16 As shown, in this embodiment of the application, when performing thermal management, the vehicle air conditioning high-pressure parameters, vehicle gear information, vehicle speed information, ambient temperature, coolant temperature in the integrated thermal management system, and air intake temperature at the air intake grille are also obtained.

[0113] When the vehicle is in gear N and the vehicle speed is greater than 0, or the ambient temperature is less than or equal to 0, or the coolant temperature is less than the set water temperature A and the intake air temperature is less than the set intake air temperature B, and the electronic accelerator control is in the off state for a duration greater than or equal to the set time, the intake grille is fully closed.

[0114] When the vehicle speed is less than or equal to the set speed and the duration is greater than or equal to the set time, or the coolant temperature is greater than or equal to the set water temperature, or the intake air temperature is greater than or equal to the set intake air temperature, or the electronic accelerometer control is in the on state, or the air conditioning high pressure parameter is greater than the set parameter C, the air intake grille is fully opened.

[0115] For example, such as Figure 15 As shown, when the vehicle is powered off and the ambient temperature is higher than the set ambient temperature, the air intake grille is fully opened.

[0116] When the vehicle is powered off, if the ambient temperature is less than or equal to the set ambient temperature, the air intake grille will close.

[0117] The ambient temperature can be set to 0; the time can be set to 15 seconds; and the vehicle speed can be set to 30 km / h.

[0118] The ambient temperature when the vehicle is powered off is the ambient temperature before power-off, which is stored in memory.

[0119] This application also provides a thermal management method for an integrated thermal management system of an automobile, including:

[0120] Acquire vehicle air conditioning high-pressure parameters, vehicle gear information, vehicle speed information, ambient temperature, coolant temperature in the integrated thermal management system, and air intake temperature at the air intake grille;

[0121] When the vehicle is in neutral (N) and the vehicle speed is greater than 0, or the ambient temperature is less than or equal to 0, or the coolant temperature is less than the set water temperature and the intake air temperature is less than the set intake air temperature, and the electronic accelerator control is in the off state for a duration greater than or equal to the set time, the intake grille is fully closed.

[0122] When the vehicle speed is less than or equal to the set speed and the duration is greater than or equal to the set time, or the coolant temperature is greater than or equal to the set water temperature, or the intake air temperature is greater than or equal to the set intake air temperature, or the electronic accelerometer control is in the on state, or the air conditioning high pressure parameter is greater than the set parameter, the air intake grille is fully opened.

[0123] For example, when the vehicle is powered off and the ambient temperature is higher than the set ambient temperature, the air intake grille is controlled to open fully;

[0124] When the vehicle is powered off, if the ambient temperature is less than or equal to the set ambient temperature, the air intake grille will close.

[0125] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0126] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0127] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An integrated thermal management system for automobiles, characterized in that, include: Air intake grille, water-side integrated module, engine cooling system, battery, low-temperature cooling system, air conditioning system, and temperature acquisition module; The water-side integrated module includes a heat exchanger, a first four-way reversing valve, a cooler, and a second water tank. The four outlets of the first four-way reversing valve are respectively connected to the heat medium outlet of the air conditioning system, the engine cooling system, the heat exchanger, and the PTC inlet of the air conditioning system. The heat exchanger is also connected to the cooler, the battery, and the PTC outlet of the air conditioning system. The cooler is also connected to the second water tank and the refrigerant inlet and outlet of the air conditioning system. The second water tank is also connected to the battery. The engine cooling system, the air conditioning system, and the low-temperature cooling system exchange heat sequentially. The low-temperature cooling system also exchanges heat with the external environment through the air intake grille. The temperature acquisition module is used to acquire the coolant temperature and the intake air temperature at the intake grille in the integrated thermal management system.

2. The integrated thermal management system for automobiles as described in claim 1, characterized in that, The air conditioning system includes a PTC, a refrigerant inlet, a refrigerant outlet, a heat transfer outlet, a heating element, a cooling element, a compressor, and a condenser. The PTC inlet is connected to the first four-way reversing valve and the engine cooling system outlet. The PTC outlet is connected to the heating element and the heat exchanger, and the heating element is connected to the heat transfer outlet. The heat transfer outlet is connected to the first four-way reversing valve. The cooling element is connected to the refrigerant inlet and the refrigerant outlet, the refrigerant outlet is connected to the compressor, the compressor is connected to the condenser, and the condenser is connected to the refrigerant inlet. The refrigerant inlet and the refrigerant outlet are also connected to the condenser.

3. The integrated thermal management system for automobiles as described in claim 2, characterized in that, The engine cooling system outlet is connected to the PTC inlet via the engine outlet pipe, and the engine outlet pipe is connected to one outlet of the first four-way reversing valve.

4. The integrated thermal management system for automobiles as described in claim 1, characterized in that, The engine cooling system includes an engine cooling system inlet, a high-temperature radiator, an engine cooling system outlet, and a second four-way reversing valve; the three outlets of the second four-way reversing valve are respectively connected to the engine cooling system inlet, the high-temperature radiator outlet, and the engine cooling system outlet; the inlet of the high-temperature radiator is also connected to the engine cooling system inlet.

5. An integrated thermal management system for automobiles as described in claim 1, characterized in that, The low-temperature cooling system includes a low-temperature radiator, which exchanges heat with the external environment through the air intake grille; the condenser of the air conditioning system exchanges heat with the low-temperature radiator; and the high-temperature radiator of the engine cooling system exchanges heat with the condenser. The low-temperature radiator is connected to functional components.

6. The integrated thermal management system for automobiles as described in claim 1, characterized in that, The integrated thermal management system has a first cooling circuit, a second cooling circuit, and a third cooling circuit; With the first cooling circuit open, the air conditioning system's refrigeration circuit is open; With the second cooling circuit connected, the circuit between the condenser and cooler of the air conditioning system is connected, as are the circuits between the heat exchanger, battery, second kettle and cooler. With the third cooling circuit connected, the air conditioning system's refrigeration circuit is connected, the circuit between the air conditioning system's condenser and cooler is connected, and the circuit between the heat exchanger, battery, second kettle, and cooler is connected.

7. An integrated thermal management system for automobiles as described in claim 1, characterized in that, The integrated thermal management system has a first heating circuit, a second heating circuit, a third heating circuit, a fourth heating circuit, a fifth heating circuit, a sixth heating circuit, a seventh heating circuit, and an eighth heating circuit; With the first heating circuit connected, the circuit between the engine cooling system and the heat exchanger is connected, as are the circuits between the heat exchanger, the battery, the second water tank, and the cooler. With the second heating circuit connected, the circuit between the engine cooling system and the air conditioning system heat transfer outlet is connected. With the third heating circuit in operation, the circuit between the engine cooling system and the heat medium outlet of the air conditioning system is in operation, the circuit between the engine cooling system and the heat exchanger is in operation, and the circuit between the heat exchanger, the battery, the second water tank and the cooler is in operation. With the fourth heating circuit connected, the circuit between the PTC and the heat exchanger of the air conditioning system is connected, as are the circuits between the heat exchanger, the battery, the second kettle, and the cooler. With the fifth heating circuit connected, the circuit between the PTC and the heat exchanger in the air conditioning system is connected. With the sixth heating circuit connected, the circuit between the PTC and the heat exchanger of the air conditioning system is connected, the circuit between the heat medium outlet of the air conditioning system and the PTC is connected, and the circuit between the heat exchanger, the battery, the second kettle and the cooler is connected. With the seventh heating circuit in operation, the circuit between the engine cooling system and the heat exchanger is in operation, the circuit between the PTC of the air conditioning system and the heat exchanger is in operation, and the circuit between the heat exchanger, the battery, the second water tank and the cooler is in operation. With the eighth heating circuit connected, the circuit between the engine cooling system and the heat medium outlet of the air conditioning system is connected, the circuit between the PTC of the air conditioning system and the heat exchanger is connected, and the circuit between the heat exchanger, the battery, the second water tank and the cooler is connected.

8. An integrated thermal management system for automobiles as described in claim 1, characterized in that, The first four-way directional valve has a first state, a second state, a third state, a fourth state, a fifth state, a sixth state, a seventh state, an eighth state, and a ninth state; In the first state, the heat exchanger is connected to the engine cooling system inlet via the first four-way reversing valve; In the second state, the heat medium outlet of the air conditioning system is connected to the inlet of the engine cooling system through the first four-way reversing valve; In the third state, the heat medium outlet of the air conditioning system is connected to the engine cooling system inlet through the first four-way reversing valve, and the heat exchanger is connected to the engine cooling system inlet through the first four-way reversing valve. In the fourth state, the heat exchanger is connected to the PTC inlet through the first four-way reversing valve; In the fifth state, the heat medium outlet of the air conditioning system is connected to the PTC inlet through the first four-way reversing valve; In the sixth state, the heat medium outlet of the air conditioning system is connected to the PTC inlet through the first four-way reversing valve, and the heat exchanger is connected to the PTC inlet through the first four-way reversing valve. In the seventh state, the heat exchanger is connected to the engine cooling system inlet through the first four-way reversing valve, and the heat medium outlet of the air conditioning system is connected to the PTC inlet through the first four-way reversing valve. In the eighth state, the heat medium outlet of the air conditioning system is connected to the engine cooling system inlet through the first four-way reversing valve, and the heat exchanger is connected to the PTC inlet through the first four-way reversing valve. In the ninth state, the ports of the first four-way directional valve are not connected to each other.

9. A thermal management method for an integrated thermal management system of an automobile as described in any one of claims 1-8, characterized in that, include: Acquire vehicle air conditioning high-pressure parameters, vehicle gear information, vehicle speed information, ambient temperature, coolant temperature in the integrated thermal management system, and air intake temperature at the air intake grille; When the vehicle is in neutral (N) and the vehicle speed is greater than 0, or the ambient temperature is less than or equal to 0, or the coolant temperature is less than the set water temperature and the intake air temperature is less than the set intake air temperature, and the electronic accelerator control is in the off state for a duration greater than or equal to the set time, the intake grille is fully closed. When the vehicle speed is less than or equal to the set speed and the duration is greater than or equal to the set time, or the coolant temperature is greater than or equal to the set water temperature, or the intake air temperature is greater than or equal to the set intake air temperature, or the electronic accelerometer control is in the on state, or the air conditioning high pressure parameter is greater than the set parameter, the air intake grille is fully opened.

10. The thermal management method of an integrated thermal management system for automobiles as described in claim 9, characterized in that, When the vehicle is powered off, if the ambient temperature is higher than the set ambient temperature, the air intake grille will be fully opened. When the vehicle is powered off, if the ambient temperature is less than or equal to the set ambient temperature, the air intake grille will close.

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