Integrated heat exchanger device and thermal management system

Abstract

The present invention provides an integrated heat exchanger device and a thermal management system. The integrated heat exchanger device includes: a cooling heat exchanger, a heating heat exchanger and an integrated electronic three-way water valve. The cooling heat exchanger has a first heat exchange end and a second heat exchange end for mutual heat exchange, and the first heat exchange end is interconnected with the refrigerant flow channel of the refrigeration equipment; the heating heat exchanger has a third heat exchange end and a fourth heat exchange end for mutual heat exchange, and the third heat exchange end is interconnected with the coolant flow channel of the heating equipment; the integrated electronic three-way water valve has a battery coolant inlet, a first battery coolant outlet and a second battery coolant outlet; the first battery coolant outlet is interconnected with the second heat exchange end, and the second battery coolant outlet is interconnected with the fourth heat exchange end; it solves the problems of low efficiency and large flow resistance of the integrated heat exchanger device in the prior art, which cannot effectively realize the heating and cooling functions of the battery system and reduce the economy of the whole vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle thermal management systems, and in particular to an integrated heat exchanger device and a thermal management system. Background Art

[0002] Heat exchangers are often used in thermal management systems, especially in electric vehicles. They are needed to supply or remove heat from the battery to ensure the proper and efficient operation of lithium-ion batteries and fuel cells. Currently, most electric vehicles use lithium-ion batteries as their power batteries. Heat is transferred from the battery to the outside world through heat exchange between the refrigerant in the air conditioning system and the coolant in the battery system. This heat exchanger works in conjunction with an expansion valve to achieve this heat exchange. Current battery thermal management technologies typically use PTC (Positive Temperature Coefficient) thermistor heaters to heat the battery. There are two common heating methods: one connects a PTC heater in series with the battery coolant circulation system to heat the battery coolant. This heating method is simple, but requires an additional PTC heater for passenger compartment heating, increasing the number of PTC heaters and the overall vehicle cost. The other method uses a single PTC heater for passenger compartment heating, heating the battery coolant through a heat exchanger. This allows both passenger compartment heating and battery heating. The latter method, which uses a single PTC heater, reduces vehicle thermal management costs and is increasingly being used. However, the latter method requires the use of a special heat exchanger device, which has two heat exchanger units, one for heating the battery coolant and the other for cooling the battery coolant. This type of heat exchanger device is increasingly being used. This heat exchanger device connects two heat exchangers in series, requiring the battery coolant to flow through the heating unit and the cooling unit one by one. Therefore, this heat exchanger device has the following two problems: First, whether the battery needs to be cooled or heated, the battery coolant needs to flow through the heating unit and the cooling unit in sequence. This flow method easily reduces the efficiency of heat exchange; second, this heat exchanger device increases the resistance of the battery coolant circulation system, resulting in increased power consumption of the water pump and reduced economic efficiency of the entire vehicle. Summary of the Invention

[0003] The main purpose of the present invention is to provide an integrated heat exchanger device and thermal management system to at least solve the problems of low efficiency and large flow resistance of the integrated heat exchanger device in the prior art, which cannot effectively realize the heating and cooling functions of the battery system and reduce the economy of the entire vehicle.

[0004] To achieve the above objectives, the first aspect of the present invention provides an integrated heat exchanger device, comprising: a cooling heat exchanger, a heating heat exchanger, and an integrated electronic three-way water valve. The cooling heat exchanger has a first heat exchange end and a second heat exchange end for heat exchange with each other, the first heat exchange end being interconnected with a refrigerant flow channel of a refrigeration device; the heating heat exchanger has a third heat exchange end and a fourth heat exchange end for heat exchange with each other, the third heat exchange end being interconnected with a coolant flow channel of a heating device; the integrated electronic three-way water valve has a battery coolant inlet, a first battery coolant outlet, and a second battery coolant outlet; the first battery coolant outlet is interconnected with the second heat exchange end, the second battery coolant outlet is interconnected with the fourth heat exchange end, and the battery coolant inlet is interconnected with a battery coolant flow channel of a power battery; wherein the integrated electronic three-way water valve is used to switch the second heat exchange end or the fourth heat exchange end to communicate with the battery coolant flow channel of the power battery to control the cooling heat exchanger to cool the power battery or control the heating heat exchanger to heat the power battery.

[0005] Furthermore, the integrated heat exchanger device also includes: an integrated electronic expansion valve, which is arranged between the first heat exchange end and the refrigerant flow channel of the refrigeration equipment, and the integrated electronic expansion valve is used to adjust the refrigerant flow of the refrigeration equipment entering the first heat exchange end.

[0006] Furthermore, the integrated electronic three-way water valve and the integrated electronic expansion valve are arranged opposite to each other in the horizontal direction, and the cooling heat exchanger and the heating heat exchanger are arranged opposite to each other on both sides of the integrated electronic three-way water valve and the integrated electronic expansion valve and are detachably connected by a bolt assembly.

[0007] Furthermore, the integrated electronic expansion valve includes an integrated electronic expansion valve body, on which an integrated electronic expansion valve plug, a refrigerant inlet and a refrigerant outlet are provided; the refrigerant inlet is connected to the refrigerant flow channel of the refrigeration equipment, and the refrigerant outlet is connected to the first heat exchange end; the integrated electronic expansion valve plug is connected to the external circuit to adjust the refrigerant flow of the refrigeration equipment entering the first heat exchange end.

[0008] Furthermore, the cooling heat exchanger includes a cooling heat exchanger outlet, a cooling heat exchanger top plate, cooling heat exchanger fins and a cooling heat exchanger bottom plate; the cooling heat exchanger fins are multiple groups, and the multiple groups of cooling heat exchanger fins are arranged between the cooling heat exchanger top plate and the cooling heat exchanger bottom plate and constitute the core of the cooling heat exchanger; the cooling heat exchanger is connected to the integrated electronic expansion valve through an internal channel; the cooling heat exchanger is also connected to the first battery coolant outlet of the integrated electronic three-way water valve; the battery coolant enters the cooling heat exchanger and flows out from the cooling heat exchanger outlet after the heat exchange is completed; wherein, the first heat exchange end includes a first water inlet and a first water outlet; the refrigerant inlet is connected to the first water inlet and the refrigeration equipment respectively, and the refrigerant outlet is connected to the first water outlet; the second heat exchange end includes a second water inlet and a second water outlet; the first battery coolant outlet is connected to the second water inlet, and the cooling heat exchanger outlet is connected to the second water outlet.

[0009] Furthermore, the integrated electronic three-way water valve includes an integrated electronic three-way water valve body, on which an integrated electronic three-way water valve inlet and an integrated electronic three-way water valve plug are provided; the integrated electronic three-way water valve inlet is connected to the battery coolant inlet, and the integrated electronic three-way water valve plug is connected to an external circuit to control the opening of the first battery coolant outlet or the second battery coolant outlet.

[0010] Furthermore, the heating heat exchanger includes a heating heat exchanger bottom plate, a heating heat exchanger heat sink, a heating heat exchanger top plate, a heating heat exchanger battery side water outlet, a heating heat exchanger PTC side water outlet and a heating heat exchanger PTC side water inlet; the heating heat exchanger heat sink is composed of multiple groups, and the multiple groups of heating heat exchanger heat sinks are arranged between the heating heat exchanger top plate and the heating heat exchanger bottom plate and constitute the core of the heating heat exchanger; the heating heat exchanger is connected to the second battery coolant outlet of the integrated electronic three-way water valve; the battery coolant enters the heating heat exchanger and flows out from the heating heat exchanger battery side water outlet after the heat exchange is completed; the heating The water inlet on the PTC side of the heat exchanger is connected to the coolant flow channel of the heating equipment; the water outlet on the PTC side of the heating heat exchanger is connected to the third heat exchange end; the water outlet on the battery side of the heating heat exchanger is connected to the fourth heat exchange end; wherein, the third heat exchange end includes a third water inlet and a third water outlet; the water inlet on the PTC side of the heating heat exchanger is connected to the third water inlet and the heating equipment respectively, and the water outlet on the PTC side of the heating heat exchanger is connected to the third water outlet; the fourth heat exchange end includes a fourth water inlet and a fourth water outlet; the coolant outlet of the second battery is connected to the fourth water inlet; the water outlet on the battery side of the heating heat exchanger is connected to the fourth water outlet.

[0011] The second aspect of the present invention provides a power battery thermal management system, which includes an air-conditioning and cooling system, a passenger compartment heating system, a heat exchanger device, a 2# electronic water pump and a power battery, wherein the heat exchanger device is an integrated heat exchanger device; the refrigerant flow channel of the air-conditioning and cooling system and the coolant flow channel of the passenger compartment heating system are respectively interconnected with the battery coolant flow channel of the power battery through the integrated heat exchanger device; wherein the integrated heat exchanger device is used to switch the refrigerant flow channel of the air-conditioning and cooling system or the coolant flow channel of the passenger compartment heating system with the battery coolant flow channel of the power battery for heat exchange to control the air-conditioning and cooling system to cool the power battery or control the passenger compartment heating system to heat the power battery; the 2# electronic water pump is used to pressurize the battery coolant flowing out of the power battery.

[0012] Furthermore, the air-conditioning refrigeration system includes an air-conditioning evaporator, an electronic expansion valve, an air-conditioning compressor, an electronic fan and an air-conditioning condenser; the air-conditioning compressor is used to compress the refrigerant; the compressed refrigerant enters the air-conditioning condenser, the air-conditioning condenser and the electronic fan are arranged opposite to each other, and the electronic fan is used to cool the air-conditioning condenser; the refrigerant liquid flowing out of the air-conditioning condenser flows to the air-conditioning evaporator and the integrated heat exchanger device respectively; the electronic expansion valve is used to adjust the refrigerant flow entering the air-conditioning evaporator.

[0013] Furthermore, the passenger compartment heating system includes a PTC heater, a 1# electronic water pump, a warm air heater and an electronic three-way valve; the PTC heater is used to heat the coolant; the electronic three-way valve is used to switch the PTC heater to the coolant flow channel of the heating heat exchanger or to the water channel of the warm air heater to control the PTC heater to heat the power battery or the air in the passenger compartment; the 1# electronic water pump is used to pressurize the coolant entering the PTC heater.

[0014] The technical solution of the present invention provides an integrated heat exchanger device and a thermal management system. The integrated heat exchanger device includes: a cooling heat exchanger, a heating heat exchanger, and an integrated electronic three-way water valve. The cooling heat exchanger has a first heat exchange end and a second heat exchange end for mutual heat exchange, and the first heat exchange end is interconnected with the refrigerant flow channel of the refrigeration equipment; the heating heat exchanger has a third heat exchange end and a fourth heat exchange end for mutual heat exchange, and the third heat exchange end is interconnected with the coolant flow channel of the heating equipment; the integrated electronic three-way water valve has a battery coolant inlet, a first battery coolant outlet, and a second battery coolant outlet; the first battery coolant outlet is interconnected with the second heat exchange end, the second battery coolant outlet is interconnected with the fourth heat exchange end, and the battery coolant inlet is interconnected with the battery coolant flow channel of the power battery; wherein the integrated electronic three-way water valve is used to switch the second heat exchange end or the fourth heat exchange end to be connected to the battery coolant flow channel of the power battery to control the cooling heat exchanger to cool the power battery or control the heating heat exchanger to heat the power battery. The patented integrated heat exchanger device allows the battery coolant to flow independently through the cooling and heating units, eliminating series flow and effectively improving heat exchange efficiency. It also reduces the flow resistance of the battery coolant system, thereby reducing the power consumption of the water pump and improving the economic efficiency of the vehicle. This solves the problem of low efficiency and high flow resistance in existing integrated heat exchanger devices, which cannot effectively realize the heating and cooling functions of the battery system and reduce the economic efficiency of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of a thermal management system that can be selected according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the overall structure of an optional integrated heat exchanger device according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic front view of the structure of an optional integrated heat exchanger device according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic side view of an optional integrated heat exchanger device according to an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the back structure of an optional integrated heat exchanger device according to an embodiment of the present invention;

[0021] Figure 6This is a detailed structural diagram of an optional integrated heat exchanger device according to an embodiment of the present invention;

[0022] Figure 7 It is a bottom-up structural schematic diagram of an optional integrated heat exchanger device according to an embodiment of the present invention.

[0023] The above drawings include the following reference numerals:

[0024] 1. PTC heater; 2. 1# electronic water pump; 3. Warm air heater; 4. Electronic three-way valve; 5. Integrated heat exchanger; 6. 2# electronic water pump; 7. Power battery; 8. Air conditioning evaporator; 9. Electronic expansion valve; 10. Air conditioning compressor; 11. Electronic fan; 12. Air conditioning condenser; 51. Cooling heat exchanger; 52. Nuts; 53. Bolts; 54. Integrated electronic expansion valve; 55. Integrated electronic three-way water valve; 56. Heating heat exchanger; 511. Cooling heat exchanger water outlet; 512. Cooling heat exchanger top plate; 513. Cooling heat exchanger fin ; 514, cooling heat exchanger bottom plate; 541, integrated electronic expansion valve body; 542, integrated electronic expansion valve plug; 543, refrigerant inlet; 544, refrigerant outlet; 551, integrated electronic three-way water valve body; 552, integrated electronic three-way water valve inlet; 553, integrated electronic three-way water valve plug; 561, heating heat exchanger bottom plate; 562, heating heat exchanger heat sink; 563, heating heat exchanger top plate; 564, heating heat exchanger battery side water outlet; 565, heating heat exchanger PTC side water outlet; 566, heating heat exchanger PTC side water inlet. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] The first embodiment of the present invention provides an integrated heat exchanger device comprising: a cooling heat exchanger 51, a heating heat exchanger 56, and an integrated electronic three-way water valve 55. The cooling heat exchanger 51 has a first heat exchange end and a second heat exchange end for heat exchange with each other, the first heat exchange end being interconnected with the refrigerant flow path of the refrigeration device; the heating heat exchanger 56 has a third heat exchange end and a fourth heat exchange end for heat exchange with each other, the third heat exchange end being interconnected with the coolant flow path of the heating device; the integrated electronic three-way water valve 55 has a battery coolant inlet, a first battery coolant outlet, and a second battery coolant outlet; the first battery coolant outlet is interconnected with the second heat exchange end, the second battery coolant outlet is interconnected with the fourth heat exchange end, and the battery coolant inlet is interconnected with the battery coolant flow path of the power battery 7; the integrated electronic three-way water valve 55 is used to switch between the second heat exchange end and the fourth heat exchange end in communication with the battery coolant flow path of the power battery 7, thereby controlling the cooling heat exchanger 51 to cool the power battery 7 or the heating heat exchanger 56 to heat the power battery 7. A power battery thermal management system includes an air conditioning and cooling system, a passenger compartment heating system, a heat exchanger, a second electronic water pump 6, and a power battery 7. The heat exchanger is an integrated heat exchanger. The refrigerant flow path of the air conditioning and cooling system and the coolant flow path of the passenger compartment heating system are interconnected with the battery coolant flow path of the power battery 7 through the integrated heat exchanger. The integrated heat exchanger is used to switch the refrigerant flow path of the air conditioning and cooling system or the coolant flow path of the passenger compartment heating system with the battery coolant flow path of the power battery 7 for heat exchange, thereby controlling the air conditioning and cooling system to cool the power battery 7 or controlling the passenger compartment heating system to heat the power battery 7. The second electronic water pump 6 is used to pressurize the battery coolant flowing out of the power battery 7. The integrated heat exchanger provided by the present invention allows the battery coolant to flow independently through the cooling unit and the heating unit, eliminating the phenomenon of series flow, thereby effectively improving heat exchange efficiency. It also reduces the flow resistance of the battery coolant system, thereby reducing the power consumption of the water pump and improving the economic efficiency of the entire vehicle. The invention solves the problem that the integrated heat exchanger device in the prior art has low efficiency and large flow resistance, cannot effectively realize the heating and cooling functions of the battery system, and reduces the economy of the whole vehicle.

[0027] like Figure 2 The figure shows the overall structure of the integrated heat exchanger device. The integrated heat exchanger device 5 is a key component in the thermal management system. From top to bottom, the integrated heat exchanger device includes a cooling heat exchanger 51, a nut 52, a bolt 53, an integrated electronic expansion valve 54, an integrated electronic three-way water valve 55, and a heating heat exchanger 56. The nut 52 and bolt 53 secure the cooling heat exchanger 51, the integrated electronic expansion valve 54, the integrated electronic three-way water valve 55, and the heating heat exchanger 56 together.

[0028] like Figure 3The figure shows a schematic front view of the integrated heat exchanger assembly. The cooling heat exchanger 51 is connected to the integrated electronic three-way water valve 55 via an internal flow channel. After entering the integrated electronic three-way water valve 55, the coolant flows through the internal flow channel into the cooling heat exchanger 51, undergoes heat exchange with the refrigerant, and then flows out of the water outlet of the cooling heat exchanger 51. The cooling heat exchanger 51 is connected to the integrated electronic expansion valve 54 via an internal flow channel. Liquid refrigerant flows from the integrated electronic expansion valve 54 into the cooling heat exchanger 51, undergoes heat exchange with the battery coolant, and then flows out of the outlet of the integrated electronic expansion valve 54. The heating heat exchanger 56 is connected to the integrated electronic three-way water valve 55 via an internal flow channel. After entering the integrated electronic three-way water valve 55, the coolant flows through the internal flow channel into the heating heat exchanger 56, undergoes heat exchange with the battery coolant, and then flows out of the outlet at the top of the heating heat exchanger 56.

[0029] like Figure 4 The figure shows a side view of the integrated heat exchanger assembly. An integrated electronic three-way water valve 55 and an integrated electronic expansion valve 54 are installed side by side between the cooling heat exchanger 51 and the heating heat exchanger 56. Nuts 52 and bolts 53 secure the cooling heat exchanger 51, the integrated electronic expansion valve 54, the integrated electronic three-way water valve 55, and the heating heat exchanger 56 together.

[0030] like Figure 5 The figure shows a schematic diagram of the back structure of the integrated heat exchanger device. The integrated electronic expansion valve 54 includes an integrated electronic expansion valve body 541, an integrated electronic expansion valve plug 542, a refrigerant inlet 543, and a refrigerant outlet 544. High-pressure, low-temperature refrigerant flowing from the air conditioning condenser 12 of the air conditioning refrigeration system flows into the integrated electronic expansion valve body 541 through the refrigerant inlet 543. The refrigerant then flows through the internal channel of the integrated electronic expansion valve body 541 into the cooling heat exchanger 51 for heat exchange. The integrated electronic expansion valve plug 542 is used to connect to an external circuit, transmit signals from the thermal management control system, and control the integrated electronic expansion valve 54 to adjust the flow of refrigerant into the cooling heat exchanger 51.

[0031] like Figure 6The figure shows a detailed structural diagram of the integrated heat exchanger device. The cooling heat exchanger 51 includes a cooling heat exchanger outlet 511, a cooling heat exchanger top plate 512, a cooling heat exchanger heat sink 513, and a cooling heat exchanger bottom plate 514. The cooling heat exchanger 51 includes several groups of cooling heat exchanger heat sinks 513. The cooling heat exchanger top plate 512, the cooling heat exchanger heat sink 513, and the cooling heat exchanger bottom plate 514 form a heat exchanger core. A layer of the heat exchanger core flows with coolant, and another layer flows with refrigerant to achieve heat exchange. The bottom of the cooling heat exchanger 51 is connected to the inlet and outlet of the integrated electronic expansion valve 54, and is also connected to an outlet of the integrated electronic three-way water valve 55. The battery coolant enters the cooling heat exchanger 51 and is discharged from the cooling heat exchanger outlet 51 after the heat exchange is completed. 1 outflow; the integrated electronic three-way water valve 55 includes an integrated electronic three-way water valve body 551, an integrated electronic three-way water valve inlet 552, and an integrated electronic three-way water valve plug 553. The battery coolant flowing out of the 2# electronic water pump 6 first flows into the integrated electronic three-way water valve inlet 552, and then flows into the cooling heat exchanger 51 and the heating heat exchanger 56 respectively through the integrated electronic three-way water valve body 551; the integrated electronic three-way water valve plug 553 is used to connect to an external circuit, transmit signals from the thermal management control system, and control the integrated electronic three-way water valve 55 to determine whether the battery coolant flows into the cooling heat exchanger 51 or the heating heat exchanger 56 to achieve the heating or cooling function.

[0032] like Figure 7 The figure shows the schematic diagram of the integrated heat exchanger device from above. Figure 5 The heating heat exchanger 56 includes a heating heat exchanger bottom plate 561, a heating heat exchanger heat sink 562, a heating heat exchanger top plate 563, a heating heat exchanger battery side water outlet 564, a heating heat exchanger PTC side water outlet 565, and a heating heat exchanger PTC side water inlet 566; the heating heat exchanger 56 includes several groups of heating heat exchanger heat sinks 562, and the heating heat exchanger bottom plate 561, the heating heat exchanger heat sink 562 and the heating heat exchanger top plate 563 constitute a heat exchanger core. A layer of the heat exchanger core flows warm air heating system coolant, and another layer flows battery coolant to achieve heat exchange; The bottom of the heating heat exchanger 56 is connected to a water outlet of the integrated electronic three-way water valve 55; the coolant in the warm air heating system heated by PTC is regulated by the electronic three-way valve 4 and enters the PTC side water inlet 566 of the heating heat exchanger, and enters the heat exchanger core through the PTC side water inlet 566 of the heating heat exchanger for heat exchange. After the heat exchange is completed, the warm air heating system coolant flows out from the PTC side water outlet 565 of the heating heat exchanger; the battery coolant enters the heating heat exchanger 56 through the integrated electronic three-way water valve 55, and flows out from the battery side water outlet 564 of the heat exchanger after the heat exchange is completed.

[0033] The second embodiment of the present invention provides a thermal management system, such as Figure 1The figure shows the schematic diagram of the thermal management system. The vehicle thermal management system includes a battery coolant circulation system, an air conditioning and refrigeration system, and a passenger compartment heating system. The battery coolant circulation system includes an integrated heat exchanger 5, a second electronic water pump 6, and a power battery 7. The air conditioning and refrigeration system includes an air conditioning evaporator 8, an electronic expansion valve 9, an air conditioning compressor 10, an electronic fan 11, and an air conditioning condenser 12. The passenger compartment heating system includes a PTC heater 1, a first electronic water pump 2, a heater 3, and an electronic three-way valve 4. In high temperatures, the power battery 7 generates a significant amount of heat. At this time, the passenger compartment heating system is inoperative, while the air conditioning and refrigeration system and battery coolant circulation system operate. The integrated electronic three-way water valve 55 in the integrated heat exchanger device 5 opens the water path to the cooling heat exchanger 51 and closes the water path to the heating heat exchanger 56; the heat generated by the power battery 7 is transferred to the coolant through the cooling water channel inside the battery, and the heated battery coolant enters the integrated electronic three-way water valve 55 in the heat exchanger device 5 under the boost of the 2# electronic water pump 6. Under the action of the integrated electronic three-way water valve 55, the battery coolant enters the cooling heat exchanger 51, and the hot battery coolant and the cold refrigerant exchange heat in the cooling heat exchanger 51 to become cold battery coolant, which enters the battery cooling water channel to cool the power battery 7; the refrigerant that has absorbed the heat of the battery coolant in the cooling heat exchanger 51 becomes gaseous, and the low-pressure gaseous refrigerant The refrigerant enters the air-conditioning compressor 10 for supercharging to become a high-temperature and high-pressure refrigerant gas; the high-temperature and high-pressure refrigerant gas enters the air-conditioning condenser 12, and is cooled into a low-temperature and high-pressure refrigerant liquid under the forced air cooling generated by the electronic fan 11; the low-temperature and high-pressure liquid refrigerant flowing out of the air-conditioning condenser 12 is divided into two paths, heading to the air-conditioning evaporator 8 and the integrated heat exchanger device 5 respectively; the air-conditioning refrigeration system has two electronic expansion valves, the electronic expansion valve 9 in front of the air-conditioning evaporator 8 is used to adjust the flow of refrigerant entering the air-conditioning evaporator 8 to adjust the temperature of the passenger compartment, and the integrated electronic expansion valve 54 is used to adjust the flow of refrigerant entering the integrated heat exchanger device 5 to adjust the cooling capacity of the cooling heat exchanger 51 and control the temperature of the battery coolant circulation system.

[0034] In a low-temperature working environment, the activity of the power battery 7 decreases, and the working performance decreases, so the power battery 7 needs to be heated. At this time, the air-conditioning and refrigeration system does not work, and the passenger compartment heating system and the battery coolant circulation system work. The integrated electronic three-way water valve 55 in the heat exchanger device 5 opens the water path to the heating heat exchanger 56 and closes the water path to the cooling heat exchanger 51; the PTC heater 1 in the passenger compartment heating system converts electrical energy into thermal energy to heat the coolant flowing through, and the outflowing high-temperature coolant flows into the electronic three-way valve 4. At this time, the electronic three-way valve 4 will open the water path to the warm air heater 3 or the water path to the heating heat exchanger 56 in the integrated heat exchanger device 5 according to demand; when the power battery 7 needs to be heated, the electronic three-way valve 4 opens the water path to the heating heat exchanger 56 in the integrated heat exchanger device 5, and the hot coolant enters the heating heat exchanger 56 to perform heat exchange with the coolant in the battery coolant circulation system to heat it; when needed When heating the passenger compartment, the electronic three-way valve 4 opens the water channel leading to the warm air heater 3, and the hot coolant enters the warm air heater 3 to exchange heat with the air in the passenger compartment, thereby achieving heating of the passenger compartment; in the warm air heating system, the coolant leaving the warm air heater 3 and the heating heat exchanger 56 becomes cold after releasing heat, and is pressurized by the 1# electronic water pump 2 and enters the PTC heater 1 again for heating and circulation; in the battery coolant circulation system, the battery coolant heated in the heating heat exchanger 56 flows into the cooling water channel of the power battery 7 to transfer heat to the battery core to achieve battery heating, and the heated battery coolant enters the integrated electronic three-way water valve 55 through the 2# electronic water pump 6 and is introduced into the heating heat exchanger 56 for heat exchange.

[0035] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An integrated heat exchanger device, characterized in that: include: A cooling heat exchanger (51), the cooling heat exchanger (51) having a first heat exchange end and a second heat exchange end for mutual heat exchange, the first heat exchange end being in communication with a refrigerant flow channel of the refrigeration equipment; a heating heat exchanger (56), the heating heat exchanger (56) having a third heat exchange end and a fourth heat exchange end for mutually exchanging heat, the third heat exchange end being in communication with a coolant flow channel of the heating device; an integrated electronic expansion valve (54), the integrated electronic expansion valve (54) being arranged between the first heat exchange end and the refrigerant flow passage of the refrigeration device, the integrated electronic expansion valve (54) being used to regulate the refrigerant flow of the refrigeration device entering the first heat exchange end; An integrated electronic three-way water valve (55), the integrated electronic three-way water valve (55) having a battery coolant inlet, a first battery coolant outlet, and a second battery coolant outlet; the first battery coolant outlet is interconnected with the second heat exchange end, the second battery coolant outlet is interconnected with the fourth heat exchange end, and the battery coolant inlet is interconnected with the battery coolant flow channel of the power battery (7); The cooling heat exchanger (51), the integrated electronic expansion valve (54), the integrated electronic three-way water valve (55) and the heating heat exchanger (56) are arranged in sequence from top to bottom, the integrated electronic three-way water valve (55) and the integrated electronic expansion valve (54) are arranged relative to each other in the horizontal direction, and the cooling heat exchanger (51) and the heating heat exchanger (56) are arranged relative to each other on both sides of the integrated electronic three-way water valve (55) and the integrated electronic expansion valve (54) and are detachably connected by a bolt assembly; The integrated electronic three-way water valve (55) is used to switch the second heat exchange end or the fourth heat exchange end to communicate with the battery coolant flow channel of the power battery (7) to control the cooling heat exchanger (51) to cool the power battery (7) or to control the heating heat exchanger (56) to heat the power battery (7).

2. The integrated heat exchanger device according to claim 1, characterized in that: The integrated electronic expansion valve (54) includes an integrated electronic expansion valve body (541), and the integrated electronic expansion valve body (541) is provided with an integrated electronic expansion valve plug (542), a refrigerant inlet (543) and a refrigerant outlet (544); the refrigerant inlet (543) is connected to the refrigerant flow channel of the refrigeration equipment, and the refrigerant outlet (544) is connected to the first heat exchange end; the integrated electronic expansion valve plug (542) is connected to an external circuit to adjust the refrigerant flow of the refrigeration equipment entering the first heat exchange end.

3. The integrated heat exchanger device according to claim 2, characterized in that: The cooling heat exchanger (51) includes a cooling heat exchanger water outlet (511), a cooling heat exchanger top plate (512), a cooling heat exchanger heat sink (513) and a cooling heat exchanger bottom plate (514); the cooling heat exchanger heat sink (513) is a plurality of groups, and the plurality of groups of cooling heat exchanger heat sinks (513) are arranged between the cooling heat exchanger top plate (512) and the cooling heat exchanger bottom plate (514) and constitute the core of the cooling heat exchanger (51); the cooling heat exchanger (51) is connected to the integrated electronic expansion valve (54) through an internal channel; the cooling heat exchanger (51) is also connected to the first battery coolant outlet of the integrated electronic three-way water valve (55); the battery coolant enters the cooling heat exchanger (51) and flows out from the cooling heat exchanger water outlet (511) after heat exchange is completed; The first heat exchange end includes a first water inlet and a first water outlet; the refrigerant inlet (543) is connected to the first water inlet and the refrigeration equipment respectively, and the refrigerant outlet (544) is connected to the first water outlet; the second heat exchange end includes a second water inlet and a second water outlet; the first battery coolant outlet is connected to the second water inlet, and the cooling heat exchanger water outlet (511) is connected to the second water outlet.

4. The integrated heat exchanger device according to claim 1, characterized in that: The integrated electronic three-way water valve (55) comprises an integrated electronic three-way water valve body (551), and an integrated electronic three-way water valve inlet (552) and an integrated electronic three-way water valve plug (553) are provided on the integrated electronic three-way water valve body (551); the integrated electronic three-way water valve inlet (552) is communicated with the battery coolant inlet, and the integrated electronic three-way water valve plug (553) is communicated with an external circuit to control the opening of a first battery coolant outlet or a second battery coolant outlet.

5. The integrated heat exchanger device according to claim 1, characterized in that: The heating heat exchanger (56) includes a heating heat exchanger bottom plate (561), a heating heat exchanger heat sink (562), a heating heat exchanger top plate (563), a heating heat exchanger battery side water outlet (564), a heating heat exchanger PTC side water outlet (565) and a heating heat exchanger PTC side water inlet (566); the heating heat exchanger heat sink (562) is a plurality of groups, and the plurality of groups of heating heat exchanger heat sinks (562) are arranged between the heating heat exchanger top plate (563) and the heating heat exchanger bottom plate (561) and constitute the core of the heating heat exchanger (56); the heating heat exchanger (56) is connected to the second battery coolant outlet of the integrated electronic three-way water valve (55); the battery coolant enters the heating heat exchanger (56) and flows out from the heating heat exchanger battery side water outlet (564) after heat exchange is completed; The water inlet (566) on the PTC side of the heating heat exchanger is in communication with the coolant flow channel of the heating device; the water outlet (565) on the PTC side of the heating heat exchanger is in communication with the third heat exchange end; the water outlet (564) on the battery side of the heating heat exchanger is in communication with the fourth heat exchange end; The third heat exchange end includes a third water inlet and a third water outlet; the water inlet (566) on the PTC side of the heating heat exchanger is connected to the third water inlet and the heating device respectively, and the water outlet (565) on the PTC side of the heating heat exchanger is connected to the third water outlet; the fourth heat exchange end includes a fourth water inlet and a fourth water outlet; the second battery coolant outlet is connected to the fourth water inlet; and the water outlet (564) on the battery side of the heating heat exchanger is connected to the fourth water outlet.

6. A power battery thermal management system, characterized in that: The invention comprises an air conditioning and refrigeration system, a passenger compartment heating system, a heat exchanger device, a No. 2 electronic water pump (6), and a power battery (7), wherein the heat exchanger device is an integrated heat exchanger device according to any one of claims 1 to 5; the refrigerant flow channel of the air conditioning and refrigeration system and the coolant flow channel of the passenger compartment heating system are respectively connected to the battery coolant flow channel of the power battery (7) through the integrated heat exchanger device; The integrated heat exchanger device is used to switch the refrigerant flow path of the air-conditioning refrigeration system or the coolant flow path of the passenger compartment heating system to exchange heat with the battery coolant flow path of the power battery (7) to control the air-conditioning refrigeration system to cool the power battery (7) or control the passenger compartment heating system to heat the power battery (7); the 2# electronic water pump (6) is used to pressurize the battery coolant flowing out of the power battery (7).

7. The thermal management system according to claim 6, characterized in that: The air-conditioning refrigeration system comprises an air-conditioning evaporator (8), an electronic expansion valve (9), an air-conditioning compressor (10), an electronic fan (11) and an air-conditioning condenser (12); the air-conditioning compressor (10) is used to compress the refrigerant; the compressed refrigerant enters the air-conditioning condenser (12), the air-conditioning condenser (12) and the electronic fan (11) are arranged opposite to each other, and the electronic fan (11) is used to cool the air-conditioning condenser (12); the refrigerant liquid flowing out of the air-conditioning condenser (12) flows to the air-conditioning evaporator (8) and the integrated heat exchanger device (5) respectively; the electronic expansion valve (9) is used to adjust the refrigerant flow entering the air-conditioning evaporator (8).

8. The thermal management system according to claim 6, wherein: The passenger compartment heating system includes a PTC heater (1), a 1# electronic water pump (2), a warm air heater (3) and an electronic three-way valve (4); the PTC heater (1) is used to heat the coolant; the electronic three-way valve (4) is used to switch the PTC heater (1) to be connected to the coolant flow channel of the heating heat exchanger (56) or the water channel of the warm air heater (3) to control the PTC heater (1) to heat the power battery (7) or heat the air in the passenger compartment; the 1# electronic water pump (2) is used to pressurize the coolant entering the PTC heater (1).

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