Thermal management system and vehicle

Abstract

The utility model discloses a thermal management system and a vehicle. The thermal management system comprises a battery pack temperature adjusting module, a passenger compartment heating module, a first heat exchanger and a first control valve. The battery pack temperature adjusting module is used for adjusting the temperature of the battery pack; the passenger compartment heating module is used for heating a passenger compartment; wherein the battery pack temperature adjusting module is connected with the first heat exchanger through a pipeline, the first heat exchanger is connected with the first control valve through a pipeline, the passenger compartment heating module is connected with the first control valve through a pipeline, and the first control valve can switch the communication state of the passenger compartment heating module and the first heat exchanger. According to the utility model, the battery pack temperature control loop and the passenger compartment heating loop are relatively independently arranged, and refrigerants in the two loops exchange heat through the heat exchanger, so that the safety of the system is remarkably improved.

Description

Technical Field

[0001] The utility model generally relates to the technical field of heat pumps, and more specifically to a thermal management system and a vehicle. Background Art

[0002] In the air-conditioning thermal management system of new energy vehicles, the most energy-saving system is the heat pump system. Heat pump technology is widely used in electric vehicles. The heat pump system usually includes compressors, condensers, evaporators, gas-liquid separators and other main components. The cooling mode or heating mode is achieved by changing the flow path or direction of the refrigerant.

[0003] However, the existing heat pump system has an unreasonable piping layout, especially the piping for power battery temperature control is directly connected with the temperature control piping of other temperature control modules, resulting in mixed flow of refrigerants and posing a safety hazard.

[0004] Therefore, there is a need to provide a thermal management system and a vehicle to at least partially solve the above problems. Utility Model Content

[0005] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0006] In order to at least partially solve the above problems, the first aspect of the present invention provides a thermal management system, comprising:

[0007] A battery pack temperature control module, used to adjust the temperature of the battery pack;

[0008] A passenger compartment heating module, used for heating the passenger compartment;

[0009] a first heat exchanger;

[0010] A first control valve;

[0011] Among them, the battery pack temperature control module is connected to the first heat exchanger through a pipeline, the first heat exchanger is connected to the first control valve through a pipeline, and the passenger compartment heating module is connected to the first control valve through a pipeline. The first control valve can switch the connection state between the passenger compartment heating module and the first heat exchanger.

[0012] Optionally, the thermal management system further comprises:

[0013] An engine temperature control module, used to adjust the temperature of the engine;

[0014] The second control valve, the passenger compartment heating module is connected to the second control valve through a pipeline, the engine temperature control module is connected to the second control valve through a pipeline, and the second control valve can switch the connection state between the engine temperature control module and the passenger compartment heating module.

[0015] Optionally, the thermal management system further comprises:

[0016] A passenger compartment air conditioning module, used for cooling the passenger compartment;

[0017] The second heat exchanger, the passenger compartment air conditioning module is connected to the second heat exchanger through a pipeline, and the battery pack temperature control module is connected to the second heat exchanger through a pipeline.

[0018] Optionally, the battery pack temperature control module includes:

[0019] a battery pack heat exchange device, wherein an outlet of the battery pack heat exchange device is connected to a first inlet of the second heat exchanger via a pipeline;

[0020] a first water pump, wherein the outlet of the first water pump is connected to the inlet of the battery pack heat exchange device through a pipeline, and the inlet of the first water pump is connected to the first outlet of the first heat exchanger through a pipeline;

[0021] The first outlet of the second heat exchanger is connected to the first inlet of the first heat exchanger through a pipeline.

[0022] Optionally, both the first control valve and the second control valve are four-way valves, each including four interfaces.

[0023] Optionally, the passenger compartment heating module comprises:

[0024] A PTC heater, wherein an outlet of the PTC heater is connected to a third interface of the second control valve;

[0025] a second water pump, wherein an outlet of the second water pump is connected to an inlet of the PTC heater;

[0026] A heater core, wherein the outlet of the heater core is connected to the inlet of the second water pump, and the inlet of the heater core is connected to the second interface of the first control valve;

[0027] The fourth interface of the second control valve is connected to the first interface of the first control valve;

[0028] The fourth interface of the first control valve is connected to the second inlet of the first heat exchanger, and the third interface of the first control valve is connected to the second outlet of the first heat exchanger.

[0029] Optionally, the engine temperature control module includes:

[0030] An engine cooling device, wherein an outlet of the engine cooling device is connected to a first interface of the second control valve;

[0031] a third water pump, wherein an outlet of the third water pump is connected to an inlet of the engine cooling device;

[0032] A high temperature radiator, wherein the outlet of the high temperature radiator is connected to the inlet of the third water pump.

[0033] Optionally, the engine temperature control module further includes:

[0034] A thermostat, wherein the inlet of the thermostat is connected to the second interface of the second control valve, the first outlet of the thermostat is connected to the inlet of the high-temperature radiator, and the second outlet of the thermostat is connected to the inlet of the third water pump.

[0035] Optionally, the passenger compartment air conditioning module comprises:

[0036] Evaporator;

[0037] A compressor, wherein an inlet of the compressor is connected to an outlet of the evaporator;

[0038] a condenser, wherein the condenser inlet is connected to the outlet of the compressor, and the condenser outlet is connected to the inlet of the evaporator and to the second inlet of the second heat exchanger;

[0039] The second outlet of the second heat exchanger is connected to the inlet of the compressor.

[0040] Optionally, a stop valve and a first expansion valve are sequentially arranged on the pipeline connecting the condenser to the evaporator;

[0041] A second expansion valve is provided on the pipeline connecting the condenser to the second heat exchanger.

[0042] Optionally, the thermal management system further comprises:

[0043] Fourth water pump;

[0044] A low-temperature radiator, wherein an outlet of the low-temperature radiator is connected to an inlet of the fourth water pump.

[0045] Optionally, the thermal management system further comprises:

[0046] a drive motor cooling device, wherein the inlet of the drive motor cooling device is connected to the outlet of the fourth water pump;

[0047] a generator cooling device, wherein the inlet of the generator cooling device is connected to the outlet of the fourth water pump;

[0048] An intercooler, wherein the inlet of the intercooler is connected to the inlet of the fourth water pump, and the outlet of the intercooler is connected to the inlet of the low-temperature radiator.

[0049] Optionally, the thermal management system further comprises:

[0050] A DC-DC cooling device, wherein the inlet of the DC-DC cooling device is connected to the outlet of the drive motor cooling device, and the outlet of the DC-DC cooling device is connected to the inlet of the low-temperature radiator;

[0051] An electrically controlled cooling device, wherein the inlet of the electrically controlled cooling device is connected to the outlet of the generator cooling device, and the outlet of the electrically controlled cooling device is connected to the inlet of the low-temperature radiator.

[0052] Optionally, both the first control valve and the second control valve are solenoid control valves;

[0053] The first heat exchanger and the second heat exchanger are both plate heat exchangers.

[0054] A second aspect of the utility model provides a vehicle, comprising:

[0055] Including battery pack and engine, also includes:

[0056] According to any one of the above technical solutions, the thermal management system is connected to the battery pack and the engine respectively.

[0057] According to a thermal management system and vehicle of the utility model, the battery pack temperature control circuit and the passenger compartment heating circuit are relatively independently arranged, and the refrigerants in the two circuits are heat exchanged through a heat exchanger, thereby preventing the high-temperature refrigerant from directly entering the battery pack through the passenger compartment heating circuit, which may cause the battery pack to be damaged by overheating. In addition, a control valve is added to the heat exchanger to control the on and off of the high-temperature refrigerant, thereby significantly improving the safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0059] Figure 1 This is a schematic diagram of the structure of a thermal management system according to a preferred embodiment of the present utility model;

[0060] Figure 2 This is a schematic diagram of a first working mode of a thermal management system according to a preferred embodiment of the present utility model;

[0061] Figure 3This is a schematic diagram of a second working mode of a thermal management system according to a preferred embodiment of the present utility model;

[0062] Figure 4 This is a schematic diagram of a third working mode of a thermal management system according to a preferred embodiment of the present utility model;

[0063] Figure 5 It is a schematic diagram of the fourth working mode of the thermal management system according to a preferred embodiment of the utility model.

[0064] Description of reference numerals:

[0065] 1: Engine cooling device 2: Third water pump

[0066] 3: High temperature radiator 4: Fan

[0067] 5: Thermostat 6: Drive motor cooling device

[0068] 7: DC-DC cooling device 8: Generator cooling device

[0069] 9: Electronic control device cooling device 10: Intercooler

[0070] 11: Low temperature radiator 12: Evaporator

[0071] 13: Compressor 14: Condenser

[0072] 15: Stop valve 16: First expansion valve

[0073] 17: Second expansion valve 18: Battery pack heat exchange device

[0074] 19: Second heat exchanger 191: First interface

[0075] 192: Second interface 193: Third interface

[0076] 194: Fourth interface 20: First heat exchanger

[0077] 201: First interface 202: Second interface

[0078] 203: Third interface 204: Fourth interface

[0079] 21: First water pump 22: Fourth water pump

[0080] 23: Second control valve 231: First interface

[0081] 232: Second interface 233: Third interface

[0082] 234: Fourth interface 24: PTC heater

[0083] 25: Second water pump 26: Warm air core

[0084] 27: First control valve 271: First interface

[0085] 272: Second interface 273: Third interface

[0086] 274: Fourth interface DETAILED DESCRIPTION

[0087] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0088] In order to thoroughly understand the utility model, a detailed description will be provided in the following description. It should be understood that these embodiments are provided to make the disclosure of the utility model thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. Obviously, the implementation of the embodiments of the utility model is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the utility model are described in detail below, but in addition to these detailed descriptions, the utility model may also have other embodiments.

[0089] Ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0090] It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and similar expressions used in the present invention are for illustrative purposes only and are not restrictive.

[0091] The utility model discloses a thermal management system and a vehicle.

[0092] Now, exemplary embodiments according to the present invention will be described in more detail with reference to the accompanying drawings.

[0093] like Figure 1 As shown, in a preferred embodiment, a thermal management system includes: a battery pack temperature control module, a passenger compartment heating module, a first heat exchanger 20 and a first control valve 27;

[0094] The battery pack temperature control module is used to adjust the temperature of the battery pack and can heat or cool the battery pack;

[0095] The passenger compartment heating module is used to heat the passenger compartment;

[0096] Among them, the battery pack temperature control module is connected to the first heat exchanger 20 through a pipeline, the first heat exchanger 20 is connected to the first control valve 27 through a pipeline, and the passenger compartment heating module is connected to the first control valve 27 through a pipeline. The first control valve 27 can switch the connection state between the passenger compartment heating module and the first heat exchanger 20.

[0097] The first control valve 27 can be switched between a first state and a second state. In the first state, the passenger compartment heating module can exchange refrigerant with the first heat exchanger 20 , and in the second state, the passenger compartment heating module cannot exchange refrigerant with the first heat exchanger 20 .

[0098] When the battery pack needs to be heated, the refrigerant in the passenger compartment heating module exchanges heat with the refrigerant in the battery pack temperature control module through the first heat exchanger 20, thereby heating the battery pack.

[0099] The refrigerant in the battery pack temperature control circuit and the passenger compartment heating circuit can exchange heat in the first heat exchanger 20, but they will not circulate with each other. Moreover, when an abnormality occurs, by switching the state of the first control valve 27, the passenger compartment heating circuit can be quickly disconnected from supplying refrigerant to the first heat exchanger 20, thereby significantly improving the safety of the system.

[0100] The first control valve 27 in this embodiment is a four-way valve, and the first control valve 27 includes four interfaces: a first interface 271, a second interface 272, a third interface 273, and a fourth interface 274; any two interfaces inside the valve can be switched to be connected, for example: when switching to one state, the first interface 271 is connected to the second interface 272, and the third interface 273 is connected to the fourth interface 274; or when switching to the second state, the first interface 271 is connected to the fourth interface 274, and the second interface 272 is connected to the third interface 273.

[0101] The refrigerant circulating in the thermal management system can use a working fluid such as air-conditioning refrigerant, and does not contain other working fluids such as ethylene glycol aqueous solution.

[0102] The thermal management system in this embodiment arranges the battery pack temperature control circuit and the passenger compartment heating circuit relatively independently, and the refrigerants in the two circuits exchange heat through a heat exchanger, thereby preventing the high-temperature refrigerant from directly entering the battery pack through the passenger compartment heating circuit, which may cause the battery pack to be damaged by overheating. In addition, a control valve is added to the heat exchanger to control the on and off of the high-temperature refrigerant, thereby significantly improving the safety of the system.

[0103] In one embodiment, the first heat exchanger 20 includes four interfaces: a first inlet 201, a first outlet 204, a second inlet 203, and a second outlet 202; inside the first inlet 201 is only connected to the first outlet 204, and the second inlet 203 is only connected to the second outlet 202, and the connection state cannot be changed arbitrarily.

[0104] In one embodiment, if Figure 1 As shown, the thermal management system also includes:

[0105] The engine temperature control module is used to adjust the temperature of the engine and can cool the engine;

[0106] The second control valve 23, the passenger compartment heating module is connected to the second control valve 23 through a pipeline, and the engine temperature control module is connected to the second control valve 23 through a pipeline. The second control valve 23 can switch the connection state between the engine temperature control module and the passenger compartment heating module.

[0107] The second control valve 23 can be switched between a first state and a second state. In the first state, the engine temperature control module can exchange refrigerant with the passenger compartment heating module. In the second state, the engine temperature control module cannot exchange refrigerant with the passenger compartment heating module.

[0108] In one embodiment, the second control valve 23 is a four-way valve, and the second control valve 23 includes four interfaces: a first interface 231, a second interface 232, a third interface 233, and a fourth interface 234; any two interfaces can be switched to be connected inside, for example: when switching to one state, the first interface 231 is connected to the second interface 232, and the third interface 233 is connected to the fourth interface 234; or when switching to two states, the first interface 231 is connected to the fourth interface 234, and the second interface 232 is connected to the third interface 233.

[0109] In one embodiment, the first control valve 27 and the second control valve 23 are both electromagnetic control valves, which can realize automatic switching between state one and state two.

[0110] In one embodiment, if Figure 1 As shown, the thermal management system also includes:

[0111] A passenger compartment air conditioning module, used for cooling the passenger compartment;

[0112] The second heat exchanger 19, the passenger compartment air conditioning module is connected to the second heat exchanger 19 through a pipeline, and the battery pack temperature control module is connected to the second heat exchanger 19 through a pipeline.

[0113] When the battery pack needs to be cooled, the refrigerant in the passenger compartment air conditioning module exchanges heat with the refrigerant in the battery pack temperature control module through the second heat exchanger 19, thereby cooling the battery pack.

[0114] In one embodiment, the second heat exchanger 19 includes four interfaces: a first inlet 191, a first outlet 194, a second inlet 193, and a second outlet 192; inside the second heat exchanger 191 is only connected to the first outlet 194, and the second inlet 193 is only connected to the second outlet 192, and the connection state cannot be changed arbitrarily.

[0115] In one embodiment, if Figure 1 As shown, the battery pack temperature control module includes:

[0116] The battery pack heat exchange device 18, the outlet of the battery pack heat exchange device 18 is connected to the first inlet 191 of the second heat exchanger 19 through a pipeline; the battery pack heat exchange device 18 mainly includes a heat exchange pipeline and various interfaces and control valves arranged in the battery pack;

[0117] A first water pump 21, the outlet of the first water pump 21 is connected to the inlet of the battery pack heat exchange device 18 through a pipeline, and the inlet of the first water pump 21 is connected to the first outlet 204 of the first heat exchanger 20 through a pipeline; the first water pump 21 can provide power for the refrigerant circulation;

[0118] The first outlet 194 of the second heat exchanger 19 is connected to the first inlet 201 of the first heat exchanger 20 through a pipeline.

[0119] In the first heat exchanger 20, the refrigerant can flow in from the first inlet 201 and flow out from the first outlet 204. In the second heat exchanger 19, the refrigerant can flow in from the first inlet 191 and flow out from the first outlet 194. Combined with the first water pump 21 and the battery pack heat exchange device 18, a complete refrigerant circulation path is formed.

[0120] In one embodiment, if Figure 1 As shown, the passenger compartment heating module includes:

[0121] A PTC heater 24, the outlet of the PTC heater 24 is connected to the third interface 233 of the second control valve 23;

[0122] A second water pump 25, wherein the outlet of the second water pump 25 is connected to the inlet of the PTC heater 24;

[0123] The heater core 26 has an outlet connected to the inlet of the second water pump 25, and the inlet of the heater core 26 is connected to the second interface 272 of the first control valve 27; when the PTC heater 24 is working, heat can be transferred to the heater core 26 through the refrigerant, and the heater core 26 blows hot air to the passenger compartment to heat the passenger compartment;

[0124] The fourth port 234 of the second control valve 23 is connected to the first port 271 of the first control valve 27;

[0125] The fourth port 274 of the first control valve 27 is connected to the second inlet 203 of the first heat exchanger 20 , and the third port 273 of the first control valve 27 is connected to the second outlet 202 of the first heat exchanger 20 .

[0126] In one embodiment, if Figure 1 As shown, the engine temperature control module includes:

[0127] The engine cooling device 1, the outlet of the engine cooling device 1 is connected to the first interface 231 of the second control valve 23; the engine cooling device 1 mainly includes a cooling pipeline and various interfaces and control valves arranged in the engine;

[0128] a third water pump 2, wherein an outlet of the third water pump 2 is connected to an inlet of the engine cooling device 1;

[0129] The high temperature radiator 3 has an outlet connected to the inlet of the third water pump 2. The high temperature radiator 3 dissipates the heat of the refrigerant in the engine cooling device 1, is arranged outside the passenger compartment, and cools down through heat exchange with the outside air.

[0130] In one embodiment, if Figure 1 As shown, the engine temperature control module also includes:

[0131] Thermostat 5 , the inlet of the thermostat 5 is connected to the second interface 232 of the second control valve 23 , the first outlet of the thermostat 5 is connected to the inlet of the high-temperature radiator 3 , and the second outlet of the thermostat 5 is connected to the inlet of the third water pump 2 .

[0132] The thermostat 5 is also called a thermostat, which is a valve that controls the flow path of the coolant. As an automatic temperature control device, it usually contains a temperature sensing component, which opens and closes the flow of the coolant by expansion or contraction. Its function is to automatically adjust the amount of water entering the high-temperature radiator 3 according to the temperature of the engine coolant, change the circulation range of the water, adjust the heat dissipation capacity of the cooling system, and ensure that the engine works within a suitable temperature range.

[0133] In one embodiment, if Figure 1 As shown, the passenger compartment air conditioning module includes:

[0134] An evaporator 12 is disposed in the passenger compartment. The refrigerant evaporates and absorbs heat in the evaporator 12, and can cool the passenger compartment;

[0135] A compressor 13, the inlet of the compressor 13 is connected to the outlet of the evaporator 12, and the compressor 13 can compress the refrigerant into a high-temperature and high-pressure state;

[0136] The condenser 14 has an inlet connected to the outlet of the compressor 13, and an outlet of the condenser 14 is connected to the inlet of the evaporator 12 and to the second inlet 193 of the second heat exchanger 19; the condenser 14 is arranged outside the passenger compartment, and the refrigerant condenses and releases heat in the condenser 14;

[0137] The second outlet 192 of the second heat exchanger 19 is connected to the inlet of the compressor 13 .

[0138] The refrigerant output from the condenser 14 can exchange heat with the refrigerant in the battery pack temperature control module in the second heat exchanger 19. At this time, the second heat exchanger 19 can play the role of an evaporator, so it can cool the battery pack.

[0139] In one embodiment, if Figure 1 As shown, a stop valve 15 and a first expansion valve 16 are sequentially arranged on the pipeline connecting the condenser 14 to the evaporator 12;

[0140] A second expansion valve 17 is provided on the pipeline connecting the condenser 14 to the second heat exchanger 19 .

[0141] When the temperature of the battery pack exceeds the set value, the passenger compartment air conditioning module can be turned on to cool the battery pack.

[0142] In one embodiment, if Figure 1 As shown, the thermal management system also includes:

[0143] Fourth water pump 22;

[0144] The low-temperature radiator 11 has an outlet connected to an inlet of the fourth water pump 22. The low-temperature radiator 11 can cool and dissipate the refrigerant flowing through it. The low-temperature radiator 11 is arranged outside the passenger compartment and cools down through heat exchange with the outside air.

[0145] In one embodiment, if Figure 1 As shown, the thermal management system also includes:

[0146] A drive motor cooling device 6, wherein the inlet of the drive motor cooling device 6 is connected to the outlet of the fourth water pump 22;

[0147] a generator cooling device 8, wherein the inlet of the generator cooling device 8 is connected to the outlet of the fourth water pump 22;

[0148] The intercooler 10 has an inlet connected to an inlet of the fourth water pump 22 , and an outlet of the intercooler 10 connected to an inlet of the low-temperature radiator 11 .

[0149] The intercooler 10 is a supporting part of the turbocharger, and its function is to reduce the temperature of the high-temperature air after the turbocharger, so as to reduce the heat load of the engine, increase the intake volume, and thus increase the power of the engine. For a supercharged engine, the intercooler is an important component of the supercharging system. Whether it is a mechanical supercharged engine or a turbocharged engine, an intercooler needs to be installed between the supercharger and the intake manifold.

[0150] In one embodiment, if Figure 1 As shown, the thermal management system also includes:

[0151] A DC-DC cooling device 7, wherein the inlet of the DC-DC cooling device 7 is connected to the outlet of the drive motor cooling device 6, and the outlet of the DC-DC cooling device 7 is connected to the inlet of the low-temperature radiator 11;

[0152] The electric-controlled cooling device 9 has an inlet connected to the outlet of the generator cooling device 8 , and an outlet of the electric-controlled cooling device 9 is connected to the inlet of the low-temperature radiator 11 .

[0153] A DC-to-DC converter, also known as a DC-DC converter, is a circuit or electromechanical device that converts electrical energy. It can convert a DC power source into a DC (or near-DC) power source of a different voltage. Its power range can be from very small (small battery) to very large (high voltage power conversion).

[0154] In one embodiment, if Figure 1 As shown, the first heat exchanger 20 and the second heat exchanger 19 are both plate heat exchangers.

[0155] In one embodiment, if Figure 1 As shown, the thermal management system also includes a fan 4. The high-temperature radiator 3, the condenser 14, and the low-temperature radiator 11 are arranged adjacent to each other. The fan 4 blows air to the high-temperature radiator 3, the condenser 14, and the low-temperature radiator 11, which can accelerate heat dissipation and improve the cooling effect.

[0156] An embodiment of the utility model further provides a vehicle, comprising a battery pack and an engine, and further comprising:

[0157] According to any one of the above embodiments, the thermal management system is connected to the battery pack and the engine respectively, and the thermal management system can heat or cool the battery and cool the engine.

[0158] Figures 2 to 5 Schematic diagram of the cycle for the thermal management system to achieve passenger compartment cooling and heating, power battery cooling and heating, and drive assembly cooling functions.

[0159] The thermal management system in this embodiment includes the following working modes:

[0160] First working mode:

[0161] The passenger compartment needs to be heated, the battery does not need to be heated, and the engine is in a cold state (engine refrigerant temperature < T);

[0162] like Figure 2 As shown, the first control valve 27 is switched to a state, and the second control valve 23 is switched to a state. The engine circuit refrigerant does not flow through the passenger compartment heating circuit. The PTC heater 24, as a heat source, generates heat to increase the temperature of the refrigerant in the passenger compartment heating circuit. With the operation of the second water pump 25, the refrigerant flows through the heater core 26 to achieve heating of the passenger compartment. At this time, the heating power of the PTC heater 24 is P, and the second water pump 25 is running to achieve rapid heating.

[0163] Second working mode:

[0164] The passenger compartment needs to be heated, but the battery does not need to be heated, and the engine is in a hot state (engine coolant temperature > T);

[0165] like Figure 3 As shown, the first control valve 27 is switched to state 1, and the second control valve 23 is switched to state 2. The engine circuit refrigerant flows through the passenger compartment heating circuit. At this time, the PTC heater 24 stops working, the second water pump 25 does not work, the third water pump 2 is running, and the high-temperature refrigerant flows through the heater core 26 to achieve passenger compartment heating.

[0166] The third working mode:

[0167] The passenger compartment needs to be heated, the battery needs to be heated, and the engine is in a cold state (engine refrigerant temperature < T);

[0168] like Figure 4 As shown, the first control valve 27 is switched to the second state, and the second control valve 23 is switched to the first state. The refrigerant of the passenger compartment heating circuit flows through the first heat exchanger 20 to heat the refrigerant of the battery circuit. At this time, the first water pump 21 of the battery circuit runs at full speed, and the heating power of the PTC heater 24 is P.

[0169] Fourth working mode:

[0170] The passenger compartment needs to be heated, the battery needs to be heated, and the engine is in a hot state (engine coolant temperature > T);

[0171] like Figure 5As shown, the first control valve 27 switches to the second state, and the second control valve 23 switches to the second state. The engine circuit refrigerant flows through the first control valve 27 and the second control valve 23 through the first heat exchanger 20, flows through the heater core 26, the second water pump 25, the PTC heater 24, and flows back to the engine circuit. In this mode, the first water pump 21 is running, and the battery circuit refrigerant flows through the battery pack heat exchange device 18, the second heat exchanger 19, the first heat exchanger 20, and flows back to the first water pump 21, and performs heat exchange with the engine hot refrigerant in the first heat exchanger 20. At this time, the first water pump 21 runs at full speed, the PTC heater 24 does not work, the second water pump 25 does not work, and the third water pump 2 runs.

[0172] A thermal management system and a vehicle according to the utility model have the following innovative features:

[0173] The thermal management system includes the motor cooling circuit, the engine cooling circuit, and the battery thermal management circuit. Through the execution of each thermal management component, the temperature of each heat-generating component during vehicle operation is stabilized within the normal range, and the functions that can be achieved are:

[0174] 1. Engine cooling: The engine coolant flows back to the engine through the high-temperature radiator, and is cooled by the operation of the fan through heat exchange between the coolant and the outside air.

[0175] 2. Cooling of heat-generating components such as motors and electronic controls: The DC-DC and drive motor water jacket, the electronic control unit and generator water jacket, and the intake intercooler form three parallel branches. The coolant flows through the above components to the low-temperature radiator, and the coolant is cooled by heat exchange with the outside air.

[0176] 3. Cab air conditioning refrigeration: consists of compressor-condenser-electromagnetic stop valve-thermal expansion valve-evaporator.

[0177] 4. Battery cooling: When the battery cell temperature rises to a certain level during vehicle operation, the battery is cooled. This solution involves a battery coolant loop and a refrigerant circulation loop. The battery coolant loop includes: battery pack-cooling plate-battery water pump; refrigerant circulation loop: compressor-condenser-electronic expansion valve-cooling plate. The refrigerant and battery coolant exchange heat in the cooling plate to reduce the temperature of the battery coolant.

[0178] 5. Battery heating and cab heating: When the battery cell temperature is too low, the battery charging and discharging functions will be affected. In order for the vehicle to operate normally under this condition, the thermal management system has a battery heating function. At the same time, the cab has a heating function to meet the vehicle's comfort needs. When the engine water temperature is low, PTC is used as a heat source; when the engine water temperature is high, the engine is used as a heat source. The engine or PTC intervenes in coordination under different circumstances, and the circuit is switched through two four-way valves, which can reduce heating time and energy consumption.

[0179] The processes and steps described in all the above preferred embodiments are only examples. Unless adverse effects occur, various processing operations can be performed in a sequence different from the sequence of the above processes. The sequence of steps in the above processes can also be increased, merged or deleted according to actual needs.

[0180] In understanding the scope of the present invention, the term "comprising" and its derivatives as used herein are intended to be open terms, which specify the existence of the recorded features, elements, components, groups, wholes and / or steps, but do not exclude the existence of other unrecorded features, elements, components, groups, wholes and / or steps. This concept also applies to words with similar meanings, such as the terms "including", "having" and their derivatives.

[0181] The terms "attached" or "attached" as used herein include: a configuration where an element is directly secured to another element by directly securing the element to the other element; a configuration where an element is indirectly secured to another element by securing the element to an intermediate member which in turn is secured to the other element; and a configuration where one element is integral with the other element, i.e., one element is substantially a part of the other element. This definition also applies to words with similar meanings such as "connect," "connect," "couple," "mount," "bond," "fix," and their derivatives. Finally, terms of degree such as "substantially," "approximately," and "approximately" as used herein represent the amount of deviation that modifies the term such that the end result will not be significantly changed.

[0182] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. The features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable or otherwise specified in the other embodiment.

[0183] The utility model has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the utility model is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of protection claimed by the utility model.

Claims

1. A thermal management system, characterized in that: include: A battery pack temperature control module, used to adjust the temperature of the battery pack; A passenger compartment heating module, used for heating the passenger compartment; A first heat exchanger (20); A first control valve (27); The battery pack temperature control module is connected to the first heat exchanger (20) through a pipeline, the first heat exchanger (20) is connected to the first control valve (27) through a pipeline, and the passenger compartment heating module is connected to the first control valve (27) through a pipeline, and the first control valve (27) can switch the connection state between the passenger compartment heating module and the first heat exchanger (20).

2. The thermal management system according to claim 1, characterized in that: Also includes: An engine temperature control module, used to adjust the temperature of the engine; A second control valve (23), the passenger compartment heating module is connected to the second control valve (23) via a pipeline, the engine temperature control module is connected to the second control valve (23) via a pipeline, and the second control valve (23) is capable of switching the connection state between the engine temperature control module and the passenger compartment heating module.

3. The thermal management system according to claim 2, characterized in that: Also includes: A passenger compartment air conditioning module, used for cooling the passenger compartment; A second heat exchanger (19), the passenger compartment air conditioning module is connected to the second heat exchanger (19) via a pipeline, and the battery pack temperature control module is connected to the second heat exchanger (19) via a pipeline.

4. The thermal management system according to claim 3, characterized in that: The battery pack temperature control module includes: A battery pack heat exchange device (18), wherein an outlet of the battery pack heat exchange device (18) is connected to a first inlet (191) of the second heat exchanger (19) via a pipeline; a first water pump (21), wherein the outlet of the first water pump (21) is connected to the inlet of the battery pack heat exchange device (18) through a pipeline, and the inlet of the first water pump (21) is connected to the first outlet (204) of the first heat exchanger (20) through a pipeline; The first outlet (194) of the second heat exchanger (19) is connected to the first inlet (201) of the first heat exchanger (20) through a pipeline.

5. The thermal management system according to claim 2, characterized in that: The first control valve (27) and the second control valve (23) are both four-way valves, each comprising four interfaces.

6. The thermal management system according to claim 2, characterized in that: The passenger compartment heating module comprises: A PTC heater (24), wherein an outlet of the PTC heater (24) is connected to a third interface (233) of the second control valve (23); a second water pump (25), wherein an outlet of the second water pump (25) is connected to an inlet of the PTC heater (24); A warm air core (26), wherein the outlet of the warm air core (26) is connected to the inlet of the second water pump (25), and the inlet of the warm air core (26) is connected to the second interface (272) of the first control valve (27); The fourth interface (234) of the second control valve (23) is connected to the first interface (271) of the first control valve (27); The fourth interface (274) of the first control valve (27) is connected to the second inlet (203) of the first heat exchanger (20), and the third interface (273) of the first control valve (27) is connected to the second outlet (202) of the first heat exchanger (20).

7. The thermal management system according to claim 2, characterized in that: The engine temperature control module comprises: An engine cooling device (1), wherein an outlet of the engine cooling device (1) is connected to a first interface (231) of the second control valve (23); a third water pump (2), wherein an outlet of the third water pump (2) is connected to an inlet of the engine cooling device (1); A high-temperature radiator (3), wherein the outlet of the high-temperature radiator (3) is connected to the inlet of the third water pump (2).

8. The thermal management system according to claim 7, characterized in that: The engine temperature control module also includes: A thermostat (5), wherein the inlet of the thermostat (5) is connected to the second interface (232) of the second control valve (23), the first outlet of the thermostat (5) is connected to the inlet of the high-temperature radiator (3), and the second outlet of the thermostat (5) is connected to the inlet of the third water pump (2).

9. The thermal management system according to claim 3, characterized in that: The passenger compartment air conditioning module comprises: Evaporator (12); A compressor (13), wherein an inlet of the compressor (13) is connected to an outlet of the evaporator (12); a condenser (14), wherein an inlet of the condenser (14) is connected to an outlet of the compressor (13), and an outlet of the condenser (14) is connected to an inlet of the evaporator (12), and is connected to a second inlet (193) of the second heat exchanger (19); The second outlet (192) of the second heat exchanger (19) is connected to the inlet of the compressor (13).

10. The thermal management system according to claim 9, characterized in that: A stop valve (15) and a first expansion valve (16) are sequentially arranged on the pipeline connecting the condenser (14) to the evaporator (12); A second expansion valve (17) is provided on the pipeline connecting the condenser (14) to the second heat exchanger (19).

11. The thermal management system according to claim 1, characterized in that: Also includes: a fourth water pump (22); A low-temperature radiator (11), wherein the outlet of the low-temperature radiator (11) is connected to the inlet of the fourth water pump (22).

12. The thermal management system according to claim 11, characterized in that: Also includes: A drive motor cooling device (6), wherein the inlet of the drive motor cooling device (6) is connected to the outlet of the fourth water pump (22); a generator cooling device (8), wherein the inlet of the generator cooling device (8) is connected to the outlet of the fourth water pump (22); An intercooler (10), wherein the inlet of the intercooler (10) is connected to the inlet of the fourth water pump (22), and the outlet of the intercooler (10) is connected to the inlet of the low-temperature radiator (11).

13. The thermal management system according to claim 12, characterized in that: Also includes: A DC-DC cooling device (7), wherein the inlet of the DC-DC cooling device (7) is connected to the outlet of the drive motor cooling device (6), and the outlet of the DC-DC cooling device (7) is connected to the inlet of the low-temperature radiator (11); An electrically controlled cooling device (9), wherein the inlet of the electrically controlled cooling device (9) is connected to the outlet of the generator cooling device (8), and the outlet of the electrically controlled cooling device (9) is connected to the inlet of the low-temperature radiator (11).

14. The thermal management system according to claim 3, characterized in that: The first control valve (27) and the second control valve (23) are both electromagnetic control valves; The first heat exchanger (20) and the second heat exchanger (19) are both plate heat exchangers.

15. A vehicle comprising a battery pack and an engine, characterized in that: Also includes: According to any one of claims 1-14, the thermal management system is connected to the battery pack and the engine respectively.

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