Integrated thermal management system

Abstract

The present application provides an integrated thermal management system, relating to the field of electric vehicle technology. The heat pump system's compressor, the indoor condenser, the outdoor condenser, and the battery cooler are sequentially connected to form a refrigerant circuit; a circuit switching mechanism comprises a multi-way valve; an electrically driven cooling system, wherein a second interface is connected to the structure of at least a portion of the water pump mechanism, and the structure of this portion is connected to the electric drive mechanism, a third interface is connected to the radiator, a fourth interface is connected to the radiator, a fifth interface is connected to the tenth interface, and a ninth interface is connected to the electric drive mechanism to form a cooling circuit; and a battery temperature control system comprises a heater and a power battery, wherein a first interface is connected to the battery cooler, a sixth interface is connected to the power battery via the water pump mechanism, an eighth interface is connected to the battery cooler, a seventh interface is connected to the twelfth interface via the heater, and an eleventh interface is connected to the power battery to form a battery temperature control circuit.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to an integrated thermal management system. Background Art

[0002] New energy vehicles are mainly divided into pure electric vehicles and hybrid electric vehicles. Due to the low energy density of lithium batteries used in new energy vehicles, the vehicle range is short compared to traditional internal combustion vehicles.

[0003] Currently, the thermal management system in new energy vehicles primarily consists of an onboard air conditioning system, an electric drive cooling system, and a battery temperature control system. The onboard air conditioning system heats or cools the passenger compartment; the electric drive cooling system heats or cools the electric drive system (composed of the motor and electronic control) by circulating coolant to dissipate heat; and the battery temperature control system cools or heats the power battery. The onboard air conditioning system also heats or cools the electric drive cooling system and the battery temperature control system, ensuring that the battery, motor, and electronic control operate at their respective optimum operating temperatures.

[0004] In common integrated thermal management systems, complex water cooling circuit switching is required to achieve the coupling of the electric drive cooling system, power battery temperature control system and air conditioning system, which is costly and heavy. Summary of the Invention

[0005] The purpose of this application is to provide an integrated thermal management system that is conducive to the coupling of the electric drive cooling system, the battery temperature control system and the heat pump system, so as to achieve reasonable energy flow and reduce investment costs.

[0006] To achieve the above objectives, this application adopts the following technical solutions:

[0007] In a first aspect, the present application provides an integrated thermal management system, comprising: a heat pump system having a compressor, an indoor condenser, an outdoor condenser, an evaporator and a battery cooler, wherein the compressor, the indoor condenser, the outdoor condenser and the battery cooler are connected in sequence, and one end of the evaporator is respectively connected between the indoor condenser and the outdoor condenser and between the outdoor condenser and the battery cooler, and the other end of the evaporator is connected between the battery cooler and the compressor to form a refrigerant circuit; a circuit switching mechanism having a multi-way valve, wherein the multi-way valve is provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, an eighth interface, a ninth interface, a tenth interface, an eleventh interface and a twelfth interface; an electric drive A cooling system comprises a water pump mechanism, a radiator and an electric drive mechanism, wherein the second interface is connected to the structure of at least a portion of the water pump mechanism, and the structure of the portion is connected to the electric drive mechanism, the third interface is connected to the radiator, the fourth interface is connected to the radiator, the fifth interface is connected to the tenth interface, and the ninth interface is connected to the electric drive mechanism to form a cooling circuit; a battery temperature control system comprises a heater and a power battery, the first interface is connected to the battery cooler, the sixth interface is connected to the power battery through the water pump mechanism, the eighth interface is connected to the battery cooler, the seventh interface is connected to the twelfth interface through the heater, and the eleventh interface is connected to the power battery to form a battery temperature control circuit.

[0008] In the above implementation process, the compressor, indoor condenser, outdoor condenser and battery cooler are connected in sequence to provide the required cooling and heat for the passenger compartment to meet comfort requirements, and the battery cooler, heater, water pump mechanism, electric drive mechanism, radiator and power battery are connected through a multi-way valve to achieve coupling between the heat pump system, electric drive cooling system and battery temperature control system, so that under different ambient temperatures and driving conditions, the cooling, heating, temperature equalization or insulation functions of each system can be met, reducing cost investment and improving overall integration.

[0009] In some embodiments, the water pump mechanism includes a first water pump and a second water pump, the first water pump is connected between the electric drive mechanism and the second interface, and the second water pump is connected between the sixth interface and the power battery.

[0010] In the above implementation process, by setting a first water pump between the electric drive mechanism and the second structure, and setting a second water pump between the sixth structure and the power battery, it is beneficial to improve the fluidity of the coolant in the cooling circuit and realize the coupling of the heat pump system and the electric drive cooling system.

[0011] In some embodiments, the electric drive cooling system further includes a first temperature sensor connected between the first water pump and the second interface.

[0012] In the above implementation process, the first temperature sensor can be used to detect the coolant temperature of the pipeline between the first water pump and the second structure, which can facilitate the control of the electric drive cooling system.

[0013] In some embodiments, the electric drive cooling system further includes an expansion tank connected to a pipeline between the first water pump and the first temperature sensor.

[0014] In the above implementation process, the expansion tank can be used to store and add coolant, accommodate air overflowing from the electric drive cooling system, and adjust the limit pressure of the electric drive cooling system to achieve control of the electric drive cooling system.

[0015] In some embodiments, the battery temperature control system further includes a second temperature sensor connected between the sixth interface and the power battery.

[0016] In the above implementation process, the second temperature sensor can be used to detect the coolant temperature of the pipeline between the sixth interface and the power battery, which can facilitate the control of the electric drive cooling system.

[0017] In some embodiments, the heat pump system includes an expansion line, which is connected between the outdoor condenser and the compressor, and the expansion line has a first expansion branch and a second expansion branch, the first expansion branch and the second expansion branch are connected in parallel, and the battery cooler is provided on the second expansion branch.

[0018] In some embodiments, the first expansion branch has a first expansion valve and a first sensor. Along the refrigerant flow direction of the refrigerant circuit, the first expansion valve, the evaporator and the first sensor are connected in sequence, and the first expansion valve is connected to the pipeline between the indoor condenser and the outdoor condenser. The first expansion valve can actively control the decompression expansion of the refrigerant, and detect parameters such as the temperature and pressure of the refrigerant through the first sensor to better control the heat pump system.

[0019] In some embodiments, the second expansion branch has a second expansion valve and a second sensor. Along the refrigerant flow direction of the refrigerant circuit, the second expansion valve, the battery cooler and the second sensor are connected in sequence. The second expansion valve can actively control the decompression expansion of the refrigerant, and detect parameters such as the temperature and pressure of the refrigerant through the second sensor to better control the heat pump system.

[0020] In some embodiments, the heat pump system further includes a gas-liquid separator, which is connected between the battery cooler and the compressor to ensure the superheat of the refrigerant at the air intake of the compressor and prevent liquid hammer.

[0021] In some embodiments, the heat pump system further includes a one-way valve connected between the battery cooler and the outdoor condenser to ensure that the refrigerant flows in only one direction.

[0022] In some embodiments, the heat pump system further includes a third sensor, which is connected between the compressor and the indoor condenser and can be used to detect parameters such as the temperature and pressure of the refrigerant to better control the heat pump system.

[0023] Other features and advantages of the present application will be described in the following description and, in part, will become apparent from the description or be understood by practicing the embodiments of the present application. The objectives and other advantages of the present application can be achieved and obtained through the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technical users in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is a schematic diagram of the connectivity of a first mode of an integrated thermal management system disclosed in an embodiment of the present application.

[0026] Figure 2 This is a schematic diagram of the connectivity of the second mode of an integrated thermal management system disclosed in an embodiment of the present application.

[0027] Figure 3 This is a schematic diagram of the connectivity of the third mode of an integrated thermal management system disclosed in an embodiment of the present application.

[0028] Figure 4 This is a schematic diagram of the connectivity of the fourth mode of an integrated thermal management system disclosed in an embodiment of the present application.

[0029] Figure 5 This is a schematic diagram of the connectivity of the fifth mode of an integrated thermal management system disclosed in an embodiment of the present application.

[0030] Figure 6 This is a connection diagram of the sixth mode of an integrated thermal management system disclosed in an embodiment of the present application.

[0031] Reference numerals

[0032] 101. Compressor; 102. First sensor; 103. Indoor condenser; 104. Refrigerant three-way valve; 105. Outdoor condenser; 106. Liquid reservoir; 107. One-way valve; 108. First electronic expansion valve; 109. Evaporator 1; 110. Second sensor; 111. Second electronic expansion valve; 112. Battery cooler; 113. Third sensor; 114. Gas-liquid separator; 115. 12-way valve; 1151. First interface; 1152. Second interface; 1153. Third interface; 1154 , fourth interface; 1155, fifth interface; 1156, sixth interface; 1157, seventh interface; 1158, eighth interface; 1159, ninth interface; 1160, tenth interface; 1161, eleventh interface; 1162, twelfth interface; 116, heater; 117, first temperature sensor; 118, expansion tank; 119, first water pump; 120, charger; 121, electric drive assembly; 122, second temperature sensor; 123; second water pump; 124, power battery; 125, radiator. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application as claimed, but merely represents selected embodiments of the present application. All other embodiments derived by a user of ordinary skill in the art based on the embodiments in the present application without creative effort are also within the scope of protection of the present application.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0036] In the description of the present application, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and should not be understood as indicating or implying relative importance.

[0037] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Users of ordinary skill in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0038] Example

[0039] With the development of economy and technology, electric vehicles have gradually become the main development direction of the automotive industry; among them, thermal management systems, as key components of electric vehicles, are gradually developing towards miniaturization and integration.

[0040] Common electric vehicle thermal management systems include three independent systems: the electric drive cooling system, the power battery temperature control system (including the heating system and the cooling system), and the air conditioning system (including the cooling and heating systems). In common integrated thermal management systems, in order to achieve complex water cooling circuit switching, it is usually necessary to design a complex water valve system. Commonly used water valves are two-way valves and three-way valves. Current systems usually contain multiple two-way valves and three-way valves, which are complex, costly, and heavy.

[0041] In view of this, if Figure 1 As shown, Figure 1 This is a connection diagram of a first mode of an integrated thermal management system disclosed in an embodiment of the present application; in the first aspect, the present application provides an integrated thermal management system, which can be applied to common electric vehicles / electric vehicles (EVs), pure electric vehicles (PV / BEVs), hybrid electric vehicles (HEVs), extended-range electric vehicles (REEVs), plug-in hybrid electric vehicles (PHEVs), new energy vehicles (NEVs), electric buses, electric motorcycles and other electric devices. The integrated management system includes: a heat pump system, a circuit switching mechanism, an electric drive cooling system and a battery temperature control system. The circuit switching mechanism has a multi-way valve, which can couple the heat pump system, the electric drive cooling system and the battery temperature control system. The heat pump system can provide the required cooling and heating for the passenger compartment to meet comfort requirements. When appropriate, the waste heat of the electric drive cooling system and the battery temperature control system can also be used as a low-temperature heat source for the heat pump system when heating, which can improve the energy efficiency utilization rate of the entire vehicle and increase the cruising range of the electric device.

[0042] Specifically, the heat pump system comprises a compressor 101, an indoor condenser 103, an outdoor condenser 105, an evaporator and a battery cooler 112. The compressor 101, the indoor condenser 103, the outdoor condenser 105 and the battery cooler 112 are connected in sequence, and one end of the evaporator is connected between the indoor condenser 103 and the outdoor condenser 105 and between the outdoor condenser 105 and the battery cooler 112, respectively. The other end of the evaporator is connected to the battery cooler 112. The pool cooler 112 and the compressor 101 form a refrigerant circuit; the circuit switching mechanism has a multi-way valve, which is provided with a first interface 1151, a second interface 1152, a third interface 1153, a fourth interface 1154, a fifth interface 1155, a sixth interface 1156, a seventh interface 1157, an eighth interface 1158, a ninth interface 1159, a tenth interface 1160, an eleventh interface 1161, and a twelfth interface 1162; the electric drive cooling system has a water pump mechanism, a heat dissipation ... The battery temperature control system includes a heater 116 and a power battery 124, the first interface 1151 is connected to the battery cooler 112, the sixth interface 1156 is connected to the power battery 124 through the water pump mechanism, the eighth interface 1158 is connected to the battery cooler 112, the seventh interface 1157 is connected to the twelfth interface 1162 through the heater 116, and the eleventh interface 1161 is connected to the power battery 124 to form a battery temperature control loop.

[0043] Exemplarily, the refrigerant circuit is used for the flow of refrigerant to achieve heating or cooling of the heat pump system, and the cooling circuit and the battery temperature control circuit are used for the flow of coolant to achieve heat exchange between the heat pump system, the electric drive cooling system and the battery temperature control system, thereby improving the service life of the three electric systems.

[0044] The multi-way valve includes but is not limited to the twelve-way valve 115. The working principle of the twelve-way valve 115 is explained by taking a ball valve as an example. However, the specific implementation method of the twelve-way valve 115 can be other types, that is, the interfaces of the multi-way valve can be connected in pairs through the flow channels on the valve core, and the valve core can rotate around the axis. After the rotation, the connection method of the interface changes, thereby changing the connection method of the heat pump system, the electric drive cooling system and the battery temperature control system. Through the design of the multi-way valve, the cost can be reduced while realizing the energy flow of the entire system.

[0045] The compressor 101 is used to compress the refrigerant and promote the flow of refrigerant in the system, and is the core component of the heat pump system; the indoor condenser 103 is used to condense the refrigerant in the heat pump system. During the condensation process, the heat in the refrigerant will be transferred to the air in the passenger compartment, thereby realizing heating of the passenger compartment; the outdoor condenser 105 is used to release the heat released by the refrigerant in the heat pump system during the condensation process into the environment, so as to realize the heat dissipation of the heat pump system; and a liquid storage tank can also be provided on the outdoor condenser 105, and the liquid storage tank is used to store liquid refrigerant to ensure the subcooling degree before the valve, wherein the liquid storage tank usually also contains a desiccant, a filter, a safety valve, etc., which can absorb excess moisture in the heat pump system, filter impurities, and provide overpressure protection; the evaporator is the refrigerant The evaporator is a place where heat is absorbed by evaporation. The air in the passenger compartment can be cooled by the evaporator to realize the function of cooling and cooling the passenger compartment; the battery cooler 112 can realize heat exchange between the refrigerant and the coolant. After the two pass through the battery cooler 112, the refrigerant absorbs the heat of the coolant and the temperature rises, while the temperature of the coolant decreases. The cooled coolant flows into the power battery 124 to cool it; the heater 116 can use the electric energy of the electric device to heat, increase the temperature of the coolant flowing through it, and the heated coolant can heat the passenger compartment or the power battery 124; the radiator 125 includes but is not limited to an air-liquid heat exchanger, which can transfer the heat of the coolant inside it to the air flowing through its surface, thereby cooling the coolant.

[0046] In the above implementation process, the compressor 101, the indoor condenser 103, the outdoor condenser 105 and the battery cooler 112 are connected in sequence, which can provide the required cooling and heat for the passenger compartment to meet the comfort requirements, and the battery cooler 112, the heater 116, the water pump mechanism, the electric drive mechanism, the radiator 125 and the power battery 124 are connected through a multi-way valve to realize the coupling between the heat pump system, the electric drive cooling system and the battery temperature control system, so that the cooling, heating, temperature equalization or insulation functions of each system can be met under different ambient temperatures and driving conditions.

[0047] In some embodiments, the water pump mechanism includes a first water pump 119 and a second water pump 123. The first water pump 119 is connected between the electric drive mechanism and the second interface 1152, and the second water pump 123 is connected between the sixth interface 1156 and the power battery 124. Exemplarily, the first water pump 119 is configured to conduct coolant from the second interface 1152 to the electric drive mechanism, and the second water pump 123 is configured to conduct coolant from the sixth interface 1156 to the power battery 124.

[0048] In the above implementation process, by setting a first water pump 119 between the electric drive mechanism and the second structure, and setting a second water pump 123 between the sixth structure and the power battery 124, it is beneficial to improve the fluidity of the coolant in the cooling circuit and realize the coupling of the heat pump system and the electric drive cooling system.

[0049] In some embodiments, the electric drive cooling system further includes a first temperature sensor 117 . The first temperature sensor 117 includes but is not limited to a temperature sensor. The first temperature sensor 117 is connected between the first water pump 119 and the second interface 1152 .

[0050] In the above implementation process, the first temperature sensor 117 can be used to detect the coolant temperature of the pipeline between the first water pump 119 and the second structure, which can facilitate the control of the electric drive cooling system.

[0051] In some embodiments, the electric drive cooling system further includes an expansion tank 118, which is connected to the pipeline between the first water pump 119 and the first temperature sensor 117. The expansion tank 118 can be used to store and add coolant, accommodate air overflowing from the electric drive cooling system, and adjust the ultimate pressure of the electric drive cooling system to achieve control of the electric drive cooling system.

[0052] In some embodiments, the battery temperature control system further includes a second temperature sensor 122 . The second temperature sensor 122 includes but is not limited to a temperature sensor. The second temperature sensor 122 is connected between the sixth interface 1156 and the power battery 124 .

[0053] In the above implementation process, the second temperature sensor 122 can be used to detect the coolant temperature of the pipeline between the sixth interface 1156 and the power battery 124, which can facilitate the control of the electric drive cooling system.

[0054] In some embodiments, the heat pump system includes an expansion pipe, which is connected between the outdoor condenser 105 and the compressor 101, and the expansion pipe has a first expansion branch and a second expansion branch, the first expansion branch and the second expansion branch are connected in parallel, and the battery cooler 112 is provided on the second expansion branch.

[0055] For example, one end of the expansion line is connected to the line between the outdoor condenser 105 and the compressor 101, and the other end of the expansion line is connected between the outdoor condenser 105 and the gas-liquid separator 114 of the heat pump system. A refrigerant three-way valve 104 is provided on the line between the outdoor condenser 105 and the compressor 101, and one end of the expansion line is connected to the refrigerant three-way valve 104; of course, in other embodiments, two refrigerant two-way valves can also be used to replace the refrigerant three-way valve 104.

[0056] In some embodiments, the first expansion branch has a first expansion valve and a first sensor 102, the first sensor 102 includes but is not limited to a temperature and pressure sensor, the first expansion valve includes but is not limited to a first electronic expansion valve 108, along the refrigerant flow direction of the refrigerant circuit, the first expansion valve, the evaporator and the first sensor 102 are connected in sequence, and the first expansion valve is connected to the pipeline between the indoor condenser 103 and the outdoor condenser 105, the first expansion valve can actively control the decompression expansion of the refrigerant, and detect parameters such as the temperature and pressure of the refrigerant through the first sensor 102, so as to better control the heat pump system.

[0057] In some embodiments, the second expansion branch has a second expansion valve and a second sensor 110. The second sensor 110 includes but is not limited to a temperature and pressure sensor. The second expansion valve includes but is not limited to a second electronic expansion valve 111. Along the refrigerant flow direction of the refrigerant circuit, the second expansion valve, the battery cooler 112 and the second sensor 110 are connected in sequence. The second expansion valve can actively control the decompression expansion of the refrigerant, and detect parameters such as the temperature and pressure of the refrigerant through the second sensor 110 to better control the heat pump system.

[0058] In some embodiments, the heat pump system further includes a gas-liquid separator 114 , which is connected between the battery cooler 112 and the compressor 101 to ensure the refrigerant superheat at the air intake of the compressor 101 and prevent liquid hammer.

[0059] In some embodiments, the heat pump system further includes a one-way valve 107 , which is connected between the battery cooler 112 and the outdoor condenser 105 to ensure that the refrigerant flows in only one direction.

[0060] In some embodiments, the heat pump system also includes a third sensor 113, which includes but is not limited to a temperature and pressure sensor. The third sensor 113 is connected between the compressor 101 and the indoor condenser 103 and can be used to detect parameters such as the temperature and pressure of the refrigerant to better control the heat pump system.

[0061] like Figure 1 As shown, in this mode, the battery circuit (including the second temperature sensor 122, the second water pump 123, and the power battery 124), the battery cooler 112 circuit (battery cooler 112), and the heater 116 circuit (heater 116) are connected in series, and the electric drive circuit (including the first temperature sensor 117, the first water pump 119, the charger 120, and the electric drive assembly 121) and the radiator 125 circuit (including radiator 125) are connected in series, and the heat pump system is in cooling mode. This mode can be used in the following operating conditions: in a high-temperature environment, the passenger compartment needs to be cooled, the power battery 124 needs to be cooled by the battery cooler 112, and the charger 120 and electric drive assembly 121 need to be cooled by the radiator 125.

[0062] In the cooling circuit, the first water pump 119 drives the coolant to circulate in the electric drive cooling system. The coolant flows through the charger 120 and the electric drive assembly 121 to absorb the heat released by the two. The coolant with increased temperature passes through the twelve-way valve 115 and then flows through the radiator 125. The heat in the coolant is carried away by the air through the radiator 125. The coolant with reduced temperature passes through the twelve-way valve 115 and returns to the first water pump 119 through the first temperature sensor 117, completing the cycle.

[0063] In the battery temperature control circuit, the second water pump 123 drives the coolant to circulate in the battery temperature control system. The coolant flows through the power battery 124 to absorb the heat released by it; the coolant after the temperature rises passes through the twelve-way valve 115, and then flows through the battery cooler 112, and the heat in the coolant is taken away by the battery cooler 112; the coolant after cooling passes through the heater 116, and then returns to the second water pump 123 through the twelve-way valve 115 and the second temperature sensor 122, completing the cycle.

[0064] In the refrigerant circuit, the low-temperature, low-pressure refrigerant is compressed by the compressor 101 and becomes a high-temperature, high-pressure gas, which flows through the indoor condenser 103 and enters the outdoor condenser 105, where it condenses and releases heat, and the heat is carried away by the air in the surrounding environment; the cooled refrigerant becomes a medium-temperature, high-pressure liquid, and is divided into two parts after passing through the one-way valve 107: the first part is expanded and decompressed by the first electronic expansion valve 108, and then enters the evaporator to vaporize and absorb heat, cooling the air in the passenger compartment flowing through its surface; the second part is expanded and decompressed by the second electronic expansion valve 111, and then enters the battery cooler 112 to vaporize and absorb heat, cooling the coolant flowing through it; the refrigerant then flows back to the compressor 101 through the gas-liquid separator 114, completing the cycle.

[0065] like Figure 2 As shown, in this mode, the battery circuit (including the second temperature sensor 122, the second water pump 123, and the power battery 124) operates independently, the electric drive circuit (including the first temperature sensor 117, the first water pump 119, the charger 120, and the electric drive assembly 121), the heater 116 circuit (heater 116), and the battery cooler 112 circuit (battery cooler 112) are connected in series, and the heat pump system is in heat pump heating mode. This mode can be used in the following operating conditions: in low-temperature environments, the passenger compartment needs to be heated by the heat pump system, the power battery 124 does not need to be heated or cooled, and the battery cooler 112 uses the waste heat of the electric drive assembly 121 and the heater 116 to heat it.

[0066] In the cooling circuit, the first water pump 119 drives the coolant to circulate within the electric drive cooling system. The coolant flows through the charger 120 and the electric drive assembly 121, absorbing heat and raising its temperature. It then passes through the twelve-way valve 115 and flows through the heater 116, where its temperature continues to rise. The coolant then passes through the twelve-way valve 115 and enters the battery cooler 112, where it is heated. The cooled coolant eventually returns to the first water pump 119, completing the cycle. Within the circuit, the coolant is heated by the charger 120, the electric drive assembly 121, and the heater 116, raising its temperature. The absorbed heat is then used to heat the battery cooler 112, thereby transferring heat to the heat pump system.

[0067] In the battery temperature control circuit, the second water pump 123 drives the coolant to circulate within the battery temperature control system. The coolant flows through the power battery 124, the twelve-way valve 115, the second temperature sensor 122, and finally returns to the second water pump 123, completing the cycle. The coolant is not significantly heated or cooled during the cycle, but its flow within the power battery 124 reduces the temperature difference between the cells within, maintaining temperature uniformity.

[0068] In the refrigerant circuit, low-temperature, low-pressure refrigerant is compressed by compressor 101 into a high-temperature, high-pressure gas. It then flows through interior condenser 103, where it condenses and releases heat. This heat is absorbed by the surrounding air, which heats the passenger compartment. The cooled refrigerant becomes a medium-temperature, high-pressure liquid, flows through refrigerant three-way valve 104, expands and reduces pressure in first electronic expansion valve 108, and then enters battery cooler 112, where it vaporizes and absorbs heat, cooling the coolant flowing through it. The refrigerant then flows through gas-liquid separator 114 and returns to compressor 101, completing the cycle.

[0069] The second mode can also be used in the following operating conditions: 1) When the heat pump system is operating, and the charger 120 and the electric drive assembly 121 are not heating, but the heater 116 is heating, the battery cooler 112 only absorbs heat from the heater 116. For example, in extremely low ambient temperatures, the electric device (such as the vehicle) is stationary (in which case the charger 120 and the electric drive assembly 121 are not heating), and the passenger compartment needs to be heated using the heat pump system. 2) When the heat pump system is operating, and the charger 120 and the electric drive assembly 121 are heating, but the heater 116 is not heating, the battery cooler 112 only absorbs heat from the charger 120 and the electric drive assembly 121. For example, in extremely low temperatures, the vehicle is in motion, and the passenger compartment is heated using the heat pump system. 3) The heat pump system is not operating, and the heater 116 is not operating. In this case, the charger 120 and the electric drive assembly 121 are in the insulation mode. If the ambient temperature is low and the vehicle is in a low-load driving condition, the charger 120 and the electric drive assembly 121 maintain a constant and uniform temperature in the system through the circulation of coolant in the internal circulation mode.

[0070] like Figure 3 As shown, in this mode, the battery circuit (including the second temperature sensor 122, the second water pump 123, and the power battery 124) and the heater 116 circuit (heater 116) are connected in series, and the electric drive circuit (including the first temperature sensor 117, the first water pump 119, the charger 120, and the electric drive assembly 121), the battery cooler 112 circuit (battery cooler 112), and the radiator 125 circuit (radiator 125) are connected in series, and the heat pump system is in heat pump heating mode. This mode can be used in the following operating conditions: in a low-temperature environment, the passenger compartment needs to be heated by the heat pump system, the power battery 124 is heated by the heater 116, and the battery cooler 112 is heated by the waste heat of the electric drive assembly 121 and the radiator 125.

[0071] In the cooling circuit, the first water pump 119 drives the coolant to circulate within the electric drive cooling system. The coolant flows through the charger 120 and the electric drive assembly 121, absorbing heat and raising its temperature. It then passes through the twelve-way valve 115 and flows through the battery cooler 112, heating it. The cooled coolant then passes through the twelve-way valve 115 and enters the radiator 125, where it is heated by the surrounding air and its temperature rises. The coolant then returns to the first water pump 119 through the twelve-way valve 115, completing the cycle. Within the circuit, the coolant is heated by the radiator 125, the charger 120, and the electric drive assembly 121, raising its temperature. The absorbed heat is then used to heat the battery cooler 112, thereby transferring heat to the heat pump system.

[0072] In the battery temperature control circuit, the second water pump 123 drives the coolant to circulate in the battery temperature control system. The high-temperature coolant flows through the power battery 124 to heat it; the cooled coolant then enters the heater 116 through the twelve-way valve 115. The heated coolant enters the twelve-way valve 115 and the second temperature sensor 122, and finally returns to the second water pump 123 to complete the cycle.

[0073] When the refrigerant circuit is in the heat pump heating mode, it has been described above and will not be repeated here.

[0074] The third mode can also be used in the following operating conditions: when the heat pump system is operating and the charger 120 and electric drive assembly 121 are not generating heat, the battery cooler 112 absorbs ambient heat solely through the radiator 125. For example, in low-temperature environments, when the vehicle is stationary (where the charger 120 and electric drive assembly 121 are not generating heat), the passenger compartment needs to utilize the radiator 125 to absorb heat from the environment.

[0075] like Figure 4As shown, in this mode, the battery circuit (including the second temperature sensor 122, the second water pump 123, and the power battery 124), the electric drive circuit (including the first temperature sensor 117, the first water pump 119, the charger 120, and the electric drive assembly 121), the battery cooler 112 circuit (battery cooler 112), and the heater 116 circuit (heater 116) are connected in series. This mode can be used in the following operating conditions: in extremely low temperature environments, the power battery 124 and the passenger compartment are heated using the waste heat of the heater 116 and the electric drive assembly 121. The first water pump 119 drives the coolant to circulate in the electric drive cooling system. The coolant flows through the charger 120 and the electric drive assembly 121 to absorb the heat released by the two. The coolant, after heating, flows through the twelve-way valve 115 and enters the battery cooler 112, releasing heat to the battery cooler 112, and then enters the heater 116 to be heated by it. The heated coolant then enters the 12-way valve 115, the second temperature sensor 122, and the second electric water pump, and then heats the power battery 124. Finally, the coolant passes through the 12-way valve 115 and the first temperature sensor 117 and returns to the first electric water pump, completing the cycle.

[0076] When the refrigerant circuit is in the heat pump heating mode, it has been described above and will not be repeated here.

[0077] Mode 4 can also be used in the following operating conditions: when the heat pump system is operating and the heater 116 is inoperative, the battery cooler 112 absorbs heat from the power battery 124 and the electric drive assembly 121. For example, in a low-temperature environment, when the vehicle is in driving mode (when the electric drive assembly 121 has excess heat), and when the power battery 124 has excess heat (such as after fast charging), the passenger compartment needs to absorb heat from the power battery 124 and the electric drive assembly 121.

[0078] like Figure 5 As shown, in this mode, the battery circuit (including the second temperature sensor 122, the second water pump 123, and the power battery 124), the heater 116 circuit (including the heater 116), the battery cooler 112 circuit (battery cooler 112), the electric drive circuit (including the first temperature sensor 117, the first water pump 119, the charger 120, and the electric drive assembly 121), and the radiator 125 circuit (including the radiator 125) are all connected in series.

[0079] This mode can be used in the following working conditions: Under normal temperature conditions, the power battery 124 and the electric drive assembly 121 dissipate heat simultaneously through the radiator 125; the first water pump 119 drives the coolant to circulate in the system, and the coolant flows through the charger 120 and the electric drive assembly 121 to absorb the heat released by the two; the coolant after the temperature rises flows through the twelve-way valve 115 and then enters the radiator 125. The coolant is cooled therein and the temperature is reduced. The cooled coolant flows through the twelve-way valve 115 and the second temperature sensor 122, and then is pressurized by the second water pump 123 and enters the power battery 124 to cool it. The coolant then enters the twelve-way valve 115 and the first temperature sensor 117, and finally returns to the first water pump 119, ending the cycle.

[0080] like Figure 6 As shown, in this mode, the battery circuit (including the second temperature sensor 122, the second water pump 123, and the power battery 124) and the heater 116 circuit (heater 116) are connected in series, and the electric drive circuit (including the first temperature sensor 117, the first water pump 119, the charger 120, and the electric drive assembly 121), the battery cooler 112 circuit (battery cooler 112), and the battery cooler 112 circuit (battery cooler 112) are connected in series, and the air conditioning system is in heat pump heating mode. This mode can be used in the following operating conditions: in a low-temperature environment, the passenger compartment needs to be heated by the heat pump system, the power battery 124 is heated by the heater 116, and the battery cooler 112 is heated by the waste heat of the electric drive assembly 121.

[0081] In the cooling circuit, the first water pump 119 drives the coolant to circulate within the system. The coolant flows through the charger 120 and the electric drive assembly 121, absorbing heat from them and raising its temperature. The coolant then flows through the battery cooler 112 through the twelve-way valve 115, heating it. The cooled coolant then returns to the first water pump 119 through the twelve-way valve 115, completing the cycle. Within the cycle, the coolant is heated by the charger 120 and the electric drive assembly 121, raising its temperature. Ultimately, the absorbed heat is used to heat the battery cooler 112, thereby transferring heat to the heat pump system.

[0082] In the battery temperature control circuit, the second water pump 123 drives the coolant to circulate within the system. The coolant flows through the power battery 124, heating it. The cooled coolant then passes through the 12-way valve 115 and enters the heater 116. After heating, the coolant enters the 12-way valve 115, the second temperature sensor 122, and finally returns to the second water pump 123, completing the cycle.

[0083] When the refrigerant circuit is in the heat pump heating mode, it has been described above and will not be repeated here.

[0084] It should be noted that the integrated thermal management system is not limited to the above six operating modes, and the integrated thermal management system can also be applied to fields such as home appliances, buildings, aircraft and ships.

[0085] The foregoing description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for users skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An integrated thermal management system, characterized in that: include: A heat pump system comprising a compressor, an indoor condenser, an outdoor condenser, an evaporator, and a battery cooler, wherein the compressor, the indoor condenser, the outdoor condenser, and the battery cooler are connected in sequence, and one end of the evaporator is connected between the indoor condenser and the outdoor condenser and between the outdoor condenser and the battery cooler, respectively, and the other end of the evaporator is connected between the battery cooler and the compressor to form a refrigerant circuit; The circuit switching mechanism includes a multi-way valve, wherein the multi-way valve is provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, an eighth interface, a ninth interface, a tenth interface, an eleventh interface, and a twelfth interface; An electrically driven cooling system comprising a water pump mechanism, a radiator, and an electrically driven mechanism, wherein the second interface is connected to at least a portion of the structure of the water pump mechanism, and the portion of the structure is connected to the electrically driven mechanism, the third interface is connected to the radiator, the fourth interface is connected to the radiator, the fifth interface is connected to the tenth interface, and the ninth interface is connected to the electrically driven mechanism, thereby forming a cooling circuit; A battery temperature control system comprising a heater and a power battery, wherein the first interface is connected to the battery cooler, the sixth interface is connected to the power battery via the water pump mechanism, the eighth interface is connected to the battery cooler, the seventh interface is connected to the twelfth interface via the heater, and the eleventh interface is connected to the power battery, thereby forming a battery temperature control loop; When the multi-way valve is switched, the integrated thermal management system can operate in at least six modes.

2. The integrated thermal management system according to claim 1, characterized in that: The water pump mechanism includes a first water pump and a second water pump. The first water pump is connected between the electric drive mechanism and the second interface, and the second water pump is connected between the sixth interface and the power battery.

3. The integrated thermal management system according to claim 2, characterized in that: The electric drive cooling system further includes a first temperature sensor connected between the first water pump and the second interface.

4. The integrated thermal management system according to claim 3, characterized in that: The electric drive cooling system further includes an expansion tank connected to a pipeline between the first water pump and the first temperature sensor.

5. The integrated thermal management system according to claim 2 or 3, characterized in that: The battery temperature control system further includes a second temperature sensor connected between the sixth interface and the power battery.

6. The integrated thermal management system according to claim 1, characterized in that: The heat pump system includes an expansion pipe connected between the outdoor condenser and the compressor, and the expansion pipe has a first expansion branch and a second expansion branch. The first expansion branch and the second expansion branch are connected in parallel, and the battery cooler is provided on the second expansion branch.

7. The integrated thermal management system according to claim 6, characterized in that: The first expansion branch has a first expansion valve and a first sensor. Along the refrigerant flow direction of the refrigerant circuit, the first expansion valve, the evaporator and the first sensor are connected in sequence, and the first expansion valve is connected to the pipeline between the indoor condenser and the outdoor condenser.

8. The integrated thermal management system according to claim 6, characterized in that: The second expansion branch has a second expansion valve and a second sensor. Along the refrigerant flow direction of the refrigerant circuit, the second expansion valve, the battery cooler and the second sensor are connected in sequence.

9. The integrated thermal management system according to claim 1 or 6, characterized in that: The heat pump system further includes a gas-liquid separator connected between the battery cooler and the compressor.

10. The integrated thermal management system according to claim 1 or 6, characterized in that: The heat pump system further includes a one-way valve connected between the battery cooler and the outdoor condenser.

11. The integrated thermal management system according to claim 1, wherein: The heat pump system further includes a third sensor connected between the compressor and the indoor condenser.

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