CN220826456U - Electric automobile thermal management system - Google Patents

Abstract

The utility model discloses a thermal management system of an electric automobile, which comprises an air conditioning module, an external heat exchange module, a solar heat collection module, an internal heat exchange module and a battery heat exchange module. The air conditioner module comprises a gas-liquid separator, a compressor and a first condenser, the external heat exchange module comprises a second condenser, the solar heat collection module comprises a solar heat collector, a solar water pump and a water-water heat exchanger, the internal heat exchange module comprises a warm core, a warm core water pump and an electric heater, and the battery heat exchange module comprises a battery pack and a battery water pump; the first condenser, the water-water heat exchanger, the electric heater and the heating core are connected, and the solar heat collector and the solar water pump are connected with the water-water heat exchanger. The solar heat collector and the water-water heat exchanger are arranged to heat the passenger cabin and the battery pack, so that the working state of the battery pack is guaranteed, and the problem of poor battery pack endurance caused by heating the passenger cabin only through the electric heater is avoided by arranging the solar heat collector and the electric heater.

Description

Electric automobile thermal management system

Technical Field

The utility model relates to the technical field of electric automobiles, in particular to an electric automobile thermal management system.

Background

Nowadays, under the large background of energy conservation and emission reduction, an electric automobile adopts a vehicle-mounted battery as a power source, and is widely focused on by virtue of energy conservation and environmental protection, a practical policy and a high and new technology, and occupies more and more automobile markets. Thermal management systems are one of the important technologies in the automotive field, and thermal management systems of electric vehicles need to consider thermal management requirements of both the battery and the passenger compartment. The vehicle-mounted battery is greatly influenced by the external environment temperature, namely when the external environment is low, the cruising ability of the vehicle-mounted battery is obviously reduced, so that the cruising ability of the electric automobile is reduced; in addition, when the existing electric automobile runs, only the electric heater with larger energy consumption is often adopted to heat the passenger cabin, so that the cruising ability of the vehicle-mounted battery is further reduced, and the cruising ability of the electric automobile is further reduced.

Disclosure of utility model

The utility model aims at: the electric automobile thermal management system is provided to solve the problems that an on-board battery of the existing electric automobile thermal management system is greatly influenced by external environment, and the endurance of the on-board battery is further reduced when a passenger cabin only adopts an electric heater to heat.

To achieve the purpose, the utility model adopts the following technical scheme:

Electric automobile thermal management system, electric automobile thermal management system is furnished with solar energy auxiliary heating mode, electric automobile thermal management system includes:

The solar heat collection module comprises a solar heat collector, a solar water pump and a water-water heat exchanger, the internal heat exchange module comprises a warm core, a warm core water pump and an electric heater, and the battery heat exchange module comprises a battery pack and a battery water pump;

The output end of the gas-liquid separator, the first input ends of the compressor and the first condenser are sequentially connected, the first output end of the first condenser is connected with the first end of the first four-way valve, the second end of the first four-way valve is connected with the first end of the second condenser, the third end of the first four-way valve is connected with the second end of the second condenser through the first expansion valve, and the fourth end of the first four-way valve is connected with the input end of the gas-liquid separator;

The second output end of the first condenser is connected with the first end of the water-water heat exchanger, the second end of the water-water heat exchanger, the electric heater and the input end of the warm core are sequentially connected, the solar heat collector, the third end of the water-water heat exchanger, the fourth end of the water-water heat exchanger and the solar water pump are sequentially connected, the output end of the warm core is connected with the first end of the first three-way valve, and the second end of the first three-way valve is connected with the second input end of the first condenser through the warm core water pump;

The third end of the first three-way valve, the battery water pump and the input end of the battery pack are sequentially connected, the output end of the battery pack is connected to the communication pipeline of the second end of the first three-way valve and the warm core water pump, and the output end of the battery pack is further connected to the communication pipeline of the third end of the first three-way valve and the battery water pump.

As the preferable scheme of the electric automobile thermal management system, the electric automobile thermal management system is further provided with a solar auxiliary dehumidification mode, the internal heat exchange module further comprises an evaporator, the third end of the first four-way valve is connected with the input end of the evaporator through the second expansion valve, and the output end of the evaporator is connected with the input end of the gas-liquid separator.

As the preferable scheme of the electric automobile thermal management system, the internal heat exchange module further comprises a first fan, and the first fan is used for blowing the evaporator and the heating core.

As the preferable scheme of the electric automobile thermal management system, the electric automobile thermal management system is further provided with a defrosting mode, the battery heat exchange module further comprises a battery cooler, the second end of the second condenser is connected with the first end of the battery cooler through a third expansion valve, the second end of the battery cooler is connected with the input end of the gas-liquid separator, and the third end of the battery cooler, the battery water pump, the battery pack and the fourth end of the battery cooler are sequentially connected.

As a preferred scheme of the electric automobile thermal management system, the electric automobile thermal management system is further provided with a refrigeration mode, the electric automobile thermal management system further comprises a motor heat exchange module, the motor heat exchange module comprises a motor and a motor water pump, the external heat exchange module further comprises a radiator, and the battery heat exchange module further comprises a second four-way valve and a third four-way valve;

The second end of the second condenser is connected to the communication pipeline of the third end of the first four-way valve and the second expansion valve, the third end of the battery cooler is connected to the first end of the second four-way valve, the second end of the second four-way valve is connected to the battery water pump, the output end of the battery pack is connected to the first end of the third four-way valve, the second end of the third four-way valve is connected to the fourth end of the battery cooler, the third end of the third four-way valve is connected to the third end of the second four-way valve, the third end of the third four-way valve is further connected to the communication pipeline of the second end of the first three-way valve and the warm core water pump, the third end of the first three-way valve is connected to the communication pipeline of the third end of the second four-way valve, the fourth end of the second four-way valve, the motor water pump, the motor and the fourth end of the third four-way valve are sequentially connected.

As the preferable scheme of the electric automobile thermal management system, the motor heat exchange module further comprises a second three-way valve, the motor is connected with the first end of the second three-way valve, the second end of the second three-way valve is connected with the fourth end of the third four-way valve through the radiator, and the third end of the second three-way valve is connected with the fourth end of the third four-way valve.

As a preferable scheme of the electric automobile thermal management system, the external heat exchange module further comprises a second fan, and the second fan is used for blowing the radiator.

As the preferable scheme of the electric automobile thermal management system, the output pipeline of the fourth end of the first four-way valve, the output pipeline of the output end of the evaporator and the output pipeline of the second end of the battery cooler are connected to the input end of the gas-liquid separator through four-way connectors, a first one-way valve is arranged on the communication pipeline of the fourth end of the first four-way valve and the input end of the gas-liquid separator, and refrigerant medium can only flow to the input end of the gas-liquid separator from the fourth end of the first four-way valve.

As the preferable scheme of the electric automobile thermal management system, the pipeline of the third end of the first four-way valve is connected to the second expansion valve and the third expansion valve through a first three-way joint, the pipeline of the second end of the second condenser is connected to the communication pipeline of the third end of the first four-way valve and the first three-way joint through a second three-way joint, a second one-way valve is arranged on the communication pipeline of the third end of the first four-way valve and the second three-way joint, refrigerant medium only flows to the second three-way joint from the third end of the first four-way valve, a third one-way valve is arranged on the communication pipeline of the second end of the second condenser and the second three-way joint, and the refrigerant medium only flows to the second three-way joint from the second end of the second condenser.

As the preferable scheme of the electric automobile thermal management system, the solar heat collection module further comprises a stop valve, and the stop valve is arranged on a communication pipeline between the solar heat collector and the third end of the water-water heat exchanger.

The beneficial effects of the utility model are as follows:

The utility model provides an electric automobile heat management system which comprises an air conditioning module, an external heat exchange module, a solar heat collection module, an internal heat exchange module and a battery heat exchange module. The air conditioner module comprises a gas-liquid separator, a compressor and a first condenser, the external heat exchange module comprises a second condenser, the solar heat collection module comprises a solar heat collector, a solar water pump and a water-water heat exchanger, the internal heat exchange module comprises a warm core, a warm core water pump and an electric heater, and the battery heat exchange module comprises a battery pack and a battery water pump; the output end of the gas-liquid separator, the first input end of the compressor and the first condenser are sequentially connected, the first output end of the first condenser is connected with the first end of the first four-way valve, the second end of the first four-way valve is connected with the first end of the second condenser, the third end of the first four-way valve is connected with the second end of the second condenser through the first expansion valve, and the fourth end of the first four-way valve is connected with the input end of the gas-liquid separator; the second output end of the first condenser is connected with the first end of the water-water heat exchanger, the second end of the water-water heat exchanger, the electric heater and the input end of the warm core are sequentially connected, the solar heat collector, the third end of the water-water heat exchanger, the fourth end of the water-water heat exchanger and the solar water pump are sequentially connected, the output end of the warm core is connected with the first end of the first three-way valve, and the second end of the first three-way valve is connected with the second input end of the first condenser through the warm core water pump; the third end of the first three-way valve, the battery water pump and the input end of the battery pack are sequentially connected, the output end of the battery pack is connected to the second end of the first three-way valve and the communication pipeline of the warm core water pump, and the output end of the battery pack is also connected to the third end of the first three-way valve and the communication pipeline of the battery water pump.

In detail, under the solar auxiliary heating mode, the cooling liquid in the first condenser enters the water-water heat exchanger through the second output end of the first condenser and the first end of the water-water heat exchanger under the driving of the warm core water pump, the solar heat collector absorbs solar energy and converts the solar energy into heat energy to heat the water path, the heated water path is driven by the solar water pump to circularly flow into the water-water heat exchanger and exchange heat with the cooling liquid in the water-water heat exchanger, so that the cooling liquid is heated, if the heated temperature can not meet the requirement, the electric heater can be selectively started to heat, if the heated temperature meets the requirement, the electric heater is closed, the heated cooling liquid enters the warm core to heat the warm core, the air of the passenger cabin can be heated after the warm core is heated to meet the heat supply requirement of the passenger cabin, and then the cooling liquid medium flows back to the first condenser through the first end of the first three-way valve, the second end of the first three-way valve, the warm core water pump and the second input end of the first condenser to complete the first passenger heating cabin. In addition, the cooling liquid medium flowing out of the warm core water pump enters the battery pack through the third end of the first three-way valve and the battery water pump, so that the battery pack is heated, the battery pack is at the working temperature, the working state of the battery pack is ensured, and then the cooling liquid medium flowing out of the second end of the first three-way valve is converged and flows back to the first condenser, so that the primary battery pack heating is completed.

The passenger cabin and the battery pack are heated by the solar heat collector and the water-water heat exchanger, so that the normal working state of the battery pack is guaranteed, and the problem of poor battery pack endurance caused by heating the passenger cabin only by the electric heater is avoided by arranging the solar heat collector and the electric heater.

Drawings

FIG. 1 is a schematic diagram of an electric vehicle thermal management system provided by an embodiment of the present utility model;

Fig. 2 is a schematic diagram of a solar-assisted heating mode of the electric vehicle thermal management system according to an embodiment of the present utility model;

Fig. 3 is a schematic diagram of a solar-assisted dehumidification mode of an electric vehicle thermal management system provided by an embodiment of the present disclosure;

fig. 4 is a schematic diagram of a defrosting mode of an electric vehicle thermal management system according to an embodiment of the present utility model;

Fig. 5 is a schematic diagram of a cooling mode of an electric vehicle thermal management system according to an embodiment of the present utility model.

In the figure:

11. a gas-liquid separator; 12. a compressor; 13. a first condenser;

21. A second condenser; 22. a first expansion valve; 23. a heat sink; 24. a second fan;

31. A solar collector; 32. a solar water pump; 33. a water-water heat exchanger; 34. a stop valve;

41. heating the core; 42. a warm core water pump; 43. an electric heater; 44. an evaporator; 45. a second expansion valve; 46. a first fan;

51. A battery pack; 52. a battery water pump; 53. a battery cooler; 54. a third expansion valve; 55. a second four-way valve; 56. a third four-way valve;

61. a first four-way valve; 62. a first three-way valve;

71. A motor; 72. a motor water pump; 73. a second three-way valve;

81. a first one-way valve; 82. a second one-way valve; 83. and a third one-way valve.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

As shown in fig. 1 to 5, an embodiment of the present utility model provides an electric vehicle thermal management system configured with a solar-assisted heating mode, and in particular, an electric vehicle thermal management system includes an air conditioning module, an external heat exchange module, a solar heat collection module, an internal heat exchange module, and a battery heat exchange module.

Specifically, as shown in fig. 1 and 2, the air conditioning module includes a gas-liquid separator 11, a compressor 12, and a first condenser 13, the external heat exchange module includes a second condenser 21, the solar heat collecting module includes a solar heat collector 31, a solar water pump 32, and a water-water heat exchanger 33, the internal heat exchange module includes a warm core 41, a warm core water pump 42, and an electric heater 43, and the battery heat exchange module includes a battery pack 51 and a battery water pump 52; the output end of the gas-liquid separator 11, the compressor 12 and the first input end of the first condenser 13 are sequentially connected, the first output end of the first condenser 13 is connected with the first end of the first four-way valve 61, the second end of the first four-way valve 61 is connected with the first end of the second condenser 21, the third end of the first four-way valve 61 is connected with the second end of the second condenser 21 through the first expansion valve 22, and the fourth end of the first four-way valve 61 is connected with the input end of the gas-liquid separator 11; the second output end of the first condenser 13 is connected with the first end of the water-water heat exchanger 33, the second end of the water-water heat exchanger 33, the electric heater 43 and the input end of the warm core 41 are sequentially connected, the solar heat collector 31, the third end of the water-water heat exchanger 33, the fourth end of the water-water heat exchanger 33 and the solar water pump 32 are sequentially connected, the output end of the warm core 41 is connected with the first end of the first three-way valve 62, and the second end of the first three-way valve 62 is connected with the second input end of the first condenser 13 through the warm core water pump 42; the third end of the first three-way valve 62, the battery water pump 52 and the input end of the battery pack 51 are sequentially connected, the output end of the battery pack 51 is connected to a communication pipeline between the second end of the first three-way valve 62 and the warm core water pump 42, and the output end of the battery pack 51 is also connected to a communication pipeline between the third end of the first three-way valve 62 and the battery water pump 52.

In detail, as shown in fig. 2, in the solar-assisted heating mode, the refrigerant medium is compressed by the compressor 12, becomes a superheated gaseous refrigerant, passes through the first condenser 13, becomes a supercooled liquid refrigerant, sequentially passes through the first output end of the first condenser 13, the first end of the first four-way valve 61, the third end of the first four-way valve 61, the first expansion valve 22 and the second end of the second condenser 21, enters the second condenser 21 to absorb heat to become a superheated gas refrigerant, and sequentially passes through the first end of the second condenser 21, the second end of the first four-way valve 61, the fourth end of the first four-way valve 61, the input end of the gas-liquid separator 11 and the output end of the gas-liquid separator 11, and returns to the compressor 12 to complete one cycle.

In detail, as shown in fig. 2, the cooling liquid in the first condenser 13 is driven by the warm core water pump 42, enters the water heat exchanger through the second output end of the first condenser 13 and the first end of the water heat exchanger, the solar heat collector 31 absorbs solar energy to convert the heat energy into heating water path, and drives the heated water path to circulate into the water heat exchanger through the solar water pump 32 and exchange heat with the cooling liquid in the water heat exchanger, so as to heat the cooling liquid, if the heated temperature cannot meet the requirement, the electric heater 43 can be selectively turned on to heat, if the heated temperature meets the requirement, the electric heater 43 is turned off, the heated cooling liquid enters the warm core 41 to heat the warm core 41, the air in the passenger cabin can be heated after the temperature of the warm core 41 is raised, so as to meet the heat supply requirement of the passenger cabin, and then the cooling liquid medium flows back into the first condenser 13 through the first end of the first three-way valve 62, the second end of the first three-way valve 62, the warm core water pump 42 and the second input end of the first condenser 13, so as to complete primary heating. In addition, the cooling medium flowing out of the warm core water pump 42 enters the battery pack 51 through the third end of the first three-way valve 62 and the battery water pump 52, so that the battery pack 51 is heated to be at the working temperature, the working state of the battery pack 51 is ensured, and then the cooling medium and the cooling medium flowing out of the second end of the first three-way valve 62 are combined and flow back to the first condenser 13, so that the primary battery pack 51 is heated.

In this embodiment, the first input end and the first output end of the first condenser 13 are used for passing in and out the refrigerant medium, and the second input end and the second output end of the first condenser 13 are used for passing in and out the coolant medium.

In the embodiment, the solar heat collector 31 and the water-water heat exchanger 33 are arranged to heat the passenger compartment and the battery pack 51, so that the normal working state of the battery pack 51 is ensured, and the problem of poor cruising ability of the battery pack 51 caused by heating the passenger compartment only through the electric heater 43 is avoided by two heating modes of the solar heat collector 31 and the electric heater 43.

Preferably, the first three-way valve 62 is a proportional three-way valve, so that the flow rate into the battery pack 51 and the flow rate returned to the first condenser 13 can be adjusted to ensure the operation state of the battery pack 51.

Specifically, as shown in fig. 3, the electric vehicle thermal management system is further configured with a solar-assisted dehumidification mode, the internal heat exchange module further includes an evaporator 44, a third end of the first four-way valve 61 is connected to an input end of the evaporator 44 through a second expansion valve 45, and an output end of the evaporator 44 is connected to an input end of the gas-liquid separator 11.

In detail, as shown in fig. 3, in the solar auxiliary dehumidification mode, the supercooled liquid refrigerant discharged through the first output end of the first condenser 13 enters the evaporator 44 through the first end of the first four-way valve 61, the third end of the first four-way valve 61 and the second expansion valve 45 to absorb heat and become a superheated gaseous refrigerant, and then flows back to the compressor 12 through the gas-liquid separator 11 to complete one cycle. In this process, the evaporator 44 exchanges heat with the highly humid air in the passenger compartment, and cools and condenses the highly humid air to separate out water, thereby achieving the purpose of dehumidifying the passenger compartment and ensuring the riding experience of the passengers. Further, after the dehumidification purpose is completed, the warm core 41 is heated and warmed through the solar heat collector 31, the water-water heat exchanger 33 and the electric heater 43, and low-temperature dry air cooled by the passenger cabin is heated, so that the passenger cabin is in a comfortable temperature range, and the riding experience of passengers is further guaranteed.

Preferably, as shown in fig. 3, the internal heat exchange module further includes a first fan 46, the first fan 46 being configured to blow the evaporator 44 and the heater core 41. By blowing the evaporator 44 and the heater core 41 by the first fan 46, the heat exchange rate between the evaporator 44 and the heater core 41 and the air in the passenger compartment can be increased, and the riding experience of passengers can be ensured.

Specifically, as shown in fig. 4, the electric vehicle thermal management system is further configured with a defrosting mode, the battery heat exchange module further includes a battery cooler 53, the second end of the second condenser 21 is connected to the first end of the battery cooler 53 through a third expansion valve 54, the second end of the battery cooler 53 is connected to the input end of the gas-liquid separator 11, and the third end of the battery cooler 53, the battery water pump 52, the battery pack 51, and the fourth end of the battery cooler 53 are sequentially connected.

In detail, as shown in fig. 4, in the defrosting mode, the supercooled liquid refrigerant discharged through the first output end of the first condenser 13 enters the second condenser 21 through the first end of the first four-way valve 61, the second end of the first four-way valve 61 and the first end of the second condenser 21 to release heat, and defrosting is completed, and then enters the battery cooler 53 through the third expansion valve 54 and the first end of the battery cooler 53 to absorb heat to become overheated gaseous refrigerant, and flows back to the compressor 12 through the second end of the battery cooler 53 and the gas-liquid separator 11 to complete one cycle; in this process, the heat of the battery pack 51 is transferred to the battery cooler 53 through the third end of the battery cooler 53, the battery water pump 52, the battery pack 51 and the fourth end of the battery cooler 53, so that the cooling of the battery pack 51 is completed, and the temperature of the cooled medium after defrosting is raised to become a superheated gaseous refrigerant, so as to meet the requirement of entering the gas-liquid separator 11. The waste heat of the battery is reasonably utilized to meet the defrosting requirement of the second condenser 21, so that the functions of the electric automobile heat management system are enriched.

In the present embodiment, the first end and the second end of the battery cooler 53 are used for passing in and out the refrigerant medium, and the third end and the fourth end of the battery cooler 53 are used for passing in and out the cooling liquid medium.

Specifically, as shown in fig. 5, the electric vehicle thermal management system is further configured with a cooling mode, the electric vehicle thermal management system further includes a motor heat exchange module, the motor heat exchange module includes a motor 71 and a motor water pump 72, the external heat exchange module further includes a radiator 23, and the battery heat exchange module further includes a second four-way valve 55 and a third four-way valve 56; the second end of the second condenser 21 is connected to the communication pipeline between the third end of the first four-way valve 61 and the second expansion valve 45, the third end of the battery cooler 53 is connected to the first end of the second four-way valve 55, the second end of the second four-way valve 55 is connected to the battery water pump 52, the output end of the battery pack 51 is connected to the first end of the third four-way valve 56, the second end of the third four-way valve 56 is connected to the fourth end of the battery cooler 53, the third end of the third four-way valve 56 is connected to the third end of the second four-way valve 55, the third end of the third four-way valve 56 is also connected to the communication pipeline between the second end of the first three-way valve 62 and the third end of the warm core water pump 42, and the third end of the first three-way valve 62 is connected to the fourth end of the second four-way valve 55, the motor water pump 72, the motor 71, the radiator 23 and the fourth end of the third four-way valve 56 in turn.

In detail, as shown in fig. 5, the supercooled liquid refrigerant discharged through the first output end of the first condenser 13 enters the evaporator 44 through the first end of the first four-way valve 61, the second end of the first four-way valve 61, the first end of the second condenser 21, the second expansion valve 45 and the input end of the evaporator 44 to absorb heat to become a superheated gaseous refrigerant, and flows back to the compressor 12 through the output end of the evaporator 44 and the gas-liquid separator 11, in which process the evaporator 44 cools the passenger compartment and blows the evaporator 44 with the first fan 46, thereby increasing the cooling rate of the evaporator 44 to the passenger compartment; in addition, the refrigerant medium at the second end of the second condenser 21 enters the battery cooler 53 through the third expansion valve 54 and the first end of the battery cooler 53 to absorb heat and then becomes a superheated gaseous refrigerant, and flows back to the compressor 12 through the second end of the battery cooler 53 and the gas-liquid separator 11, in the process, the high-temperature cooling liquid flowing out of the battery pack 51 enters the battery cooler 53 through the first end of the third four-way valve 56, the second end of the third four-way valve 56 and the fourth end of the battery cooler 53 under the driving of the battery water pump 52 to exchange heat, and after the high-temperature cooling liquid is cooled, the high-temperature cooling liquid flows back to the battery pack 51 through the third end of the battery cooler 53, the first end of the second four-way valve 55, the second end of the battery water pump 52 and the input end of the battery pack 51 to complete one-time cooling of the battery pack 51.

Specifically, as shown in fig. 5, the high-temperature coolant at the outlet of the motor 71 is driven by the motor water pump 72 to enter the radiator 23 to exchange heat with the outside air, thereby reducing the temperature of the high-temperature coolant, and then flows back to the motor 71 through the fourth end of the third four-way valve 56, the third end of the second four-way valve 55 and the motor water pump 72, thereby completing the cooling of the motor 71 once. Further, the external heat exchange module further comprises a second fan 24, and the second fan 24 is used for blowing the radiator 23. The second fan 24 blows the radiator 23, so that the speed of heat exchange between the radiator 23 and the outside can be increased, and the cooling effect on the motor 71 can be improved.

Preferably, as shown in fig. 5, the motor heat exchange module further includes a second three-way valve 73, the motor 71 is connected to a first end of the second three-way valve 73, a second end of the second three-way valve 73 is connected to a fourth end of the third four-way valve 56 through the radiator 23, and a third end of the second three-way valve 73 is connected to the fourth end of the third four-way valve 56. So configured, by controlling the opening and closing of the two output ends of the second three-way valve 73, the motor 71 is selectively connected to the radiator 23 to exchange heat with the external environment, or when the motor 71 does not need to exchange heat with the external environment, the motor 71 can perform self-circulation, thereby ensuring the operating state of the motor 71. Optionally, in the solar-assisted heating mode, the output end of the motor 71, the first end of the second three-way valve 73, the third end of the second three-way valve 73, the fourth end of the third four-way valve 56, the second end of the third four-way valve 56, the fourth end of the battery cooler 53, the third end of the battery cooler 53, the first end of the second four-way valve 55, the fourth end of the second four-way valve 55, the motor water pump 72 and the input end of the motor 71 are sequentially communicated, thereby completing heat storage of the motor 71.

Preferably, as shown in fig. 1 to 5, the solar heat collecting module further includes a shut-off valve 34, and the shut-off valve 34 is disposed at a communication line of the solar heat collector 31 and the third end of the water-to-water heat exchanger 33. The cut-off valve 34 can conveniently control the water way of the solar heat collection module to be switched on and off.

Preferably, in order to save installation space of the piping, as shown in fig. 1 to 5, the output piping of the fourth end of the first four-way valve 61, the output piping of the output end of the evaporator 44, and the output piping of the second end of the battery cooler 53 are connected to the input end of the gas-liquid separator 11 through four-way joints. A first check valve 81 is disposed on a communication pipe between the fourth end of the first four-way valve 61 and the input end of the gas-liquid separator 11, and the refrigerant medium can flow from the fourth end of the first four-way valve 61 to the input end of the gas-liquid separator 11 only. The pipeline at the fourth end of the first four-way valve 61, the pipeline at the output end of the evaporator 44 and the pipeline of the battery cooler 53 are connected in series by arranging the four-way joint, so that the utilization of the pipeline is saved and the space occupation is reduced; by providing the first check valve 81, the refrigerant medium flowing out of the evaporator 44 and the battery cooler 53 is prevented from flowing in series to the first four-way valve 61.

Further, as shown in fig. 1 to 5, the pipeline of the third end of the first four-way valve 61 is connected to the second expansion valve 45 and the third expansion valve 54 through a first three-way joint, the pipeline of the second end of the second condenser 21 is connected to the communication pipeline of the third end of the first four-way valve 61 and the first three-way joint through a second three-way joint, the second check valve 82 is provided on the communication pipeline of the third end of the first four-way valve 61 and the second three-way joint, and the refrigerant medium flows from the third end of the first four-way valve 61 to the second three-way joint only, the third check valve 83 is provided on the communication pipeline of the second end of the second condenser 21 and the second three-way joint, and the refrigerant medium flows from the second end of the second condenser 21 to the second three-way joint only. The number of pipelines is effectively reduced through the arrangement of the first three-way joint and the second three-way joint, the space occupation of the pipelines is also reduced, and the series flow of the second end of the second condenser 21 and the third end of the first four-way valve 61 can be avoided through the arrangement of the second one-way valve 82 and the third one-way valve 83.

In this embodiment, the first three-way valve 62 and the second three-way valve 73 are electromagnetic three-way valves, the first expansion valve 22, the second expansion valve 45 and the third expansion valve 54 are electronic expansion valves, the first four-way valve 61, the second four-way valve 55 and the third four-way valve 56 are electronic four-way valves, and the stop valve 34 is an electromagnetic valve.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. Electric automobile thermal management system, its characterized in that, electric automobile thermal management system is furnished with solar energy auxiliary heating mode, electric automobile thermal management system includes:

the solar heat collection module comprises a solar heat collector (31), a solar water pump (32) and a water-water heat exchanger (33), the internal heat exchange module comprises a heating core (41), a heating core water pump (42) and an electric heater (43), and the battery heat exchange module comprises a battery pack (51) and a battery water pump (52);

The output end of the gas-liquid separator (11), the compressor (12) and the first input end of the first condenser (13) are sequentially connected, the first output end of the first condenser (13) is connected with the first end of the first four-way valve (61), the second end of the first four-way valve (61) is connected with the first end of the second condenser (21), the third end of the first four-way valve (61) is connected with the second end of the second condenser (21) through the first expansion valve (22), and the fourth end of the first four-way valve (61) is connected with the input end of the gas-liquid separator (11);

The second output end of the first condenser (13) is connected with the first end of the water-water heat exchanger (33), the second end of the water-water heat exchanger (33), the electric heater (43) and the input end of the heating core (41) are sequentially connected, the third end of the solar heat collector (31), the third end of the water-water heat exchanger (33), the fourth end of the water-water heat exchanger (33) and the solar water pump (32) are sequentially connected, the output end of the heating core (41) is connected with the first end of the first three-way valve (62), and the second end of the first three-way valve (62) is connected with the second input end of the first condenser (13) through the heating core water pump (42);

The third end of the first three-way valve (62), the battery water pump (52) and the input end of the battery pack (51) are sequentially connected, the output end of the battery pack (51) is connected to the communication pipeline of the second end of the first three-way valve (62) and the warm core water pump (42), and the output end of the battery pack (51) is also connected to the communication pipeline of the third end of the first three-way valve (62) and the battery water pump (52).

2. The electric automobile thermal management system according to claim 1, further configured with a solar-assisted dehumidification mode, the internal heat exchange module further comprising an evaporator (44), the third end of the first four-way valve (61) being connected to an input of the evaporator (44) through a second expansion valve (45), an output of the evaporator (44) being connected to an input of the gas-liquid separator (11).

3. The electric vehicle thermal management system of claim 2, characterized in that the internal heat exchange module further comprises a first fan (46), the first fan (46) being configured to blow the evaporator (44) and the warm core (41).

4. The electric automobile thermal management system according to claim 2, wherein the electric automobile thermal management system is further configured with a defrosting mode, the battery heat exchange module further comprises a battery cooler (53), the second end of the second condenser (21) is connected to the first end of the battery cooler (53) through a third expansion valve (54), the second end of the battery cooler (53) is connected to the input end of the gas-liquid separator (11), and the third end of the battery cooler (53), the battery water pump (52), the battery pack (51) and the fourth end of the battery cooler (53) are sequentially connected.

5. The electric vehicle thermal management system of claim 4, further configured with a cooling mode, the electric vehicle thermal management system further comprising a motor heat exchange module comprising a motor (71) and a motor water pump (72), the external heat exchange module further comprising a radiator (23), the battery heat exchange module further comprising a second four-way valve (55) and a third four-way valve (56);

The second end of the second condenser (21) is connected to the communication pipeline of the first four-way valve (61) and the second expansion valve (45), the third end of the battery cooler (53) is connected to the first end of the second four-way valve (55), the second end of the second four-way valve (55) is connected to the battery water pump (52), the output end of the battery pack (51) is connected to the first end of the third four-way valve (56), the second end of the third four-way valve (56) is connected to the fourth end of the battery cooler (53), the third end of the third four-way valve (56) is connected to the third end of the second four-way valve (55), the third end of the third four-way valve (56) is also connected to the communication pipeline of the second end of the first three-way valve (62) and the warm core water pump (42), the third end of the third three-way valve (62) is connected to the fourth end of the fourth motor (55), the fourth end of the fourth motor (56) and the fourth end of the fourth valve (72), and the fourth end of the fourth motor (56) are connected to the fourth end of the fourth motor (56), and the fourth end of the fourth motor (71).

6. The electric vehicle thermal management system of claim 5, wherein the motor heat exchange module further comprises a second three-way valve (73), the motor (71) is connected to a first end of the second three-way valve (73), a second end of the second three-way valve (73) is connected to a fourth end of the third four-way valve (56) through the radiator (23), and a third end of the second three-way valve (73) is connected to a fourth end of the third four-way valve (56).

7. The electric vehicle thermal management system of claim 5, characterized in that the external heat exchange module further comprises a second fan (24), the second fan (24) being configured to blow the radiator (23).

8. The electric automobile thermal management system according to claim 4, wherein the output pipeline of the fourth end of the first four-way valve (61), the output pipeline of the output end of the evaporator (44), and the output pipeline of the second end of the battery cooler (53) are connected to the input end of the gas-liquid separator (11) through four-way connectors, a first one-way valve (81) is disposed on a communication pipeline between the fourth end of the first four-way valve (61) and the input end of the gas-liquid separator (11), and refrigerant medium can only flow from the fourth end of the first four-way valve (61) to the input end of the gas-liquid separator (11).

9. The electric automobile thermal management system according to claim 4, wherein the pipeline of the third end of the first four-way valve (61) is connected to the second expansion valve (45) and the third expansion valve (54) through a first three-way joint, the pipeline of the second end of the second condenser (21) is connected to the communication pipeline of the third end of the first four-way valve (61) and the first three-way joint through a second three-way joint, a second one-way valve (82) is arranged on the communication pipeline of the third end of the first four-way valve (61) and the second three-way joint, and refrigerant medium flows to the second three-way joint only from the third end of the first four-way valve (61), a third one-way valve (83) is arranged on the communication pipeline of the second end of the second condenser (21) and the second three-way joint, and refrigerant medium flows to the second three-way joint only from the second end of the second condenser (21).

10. The electric vehicle thermal management system according to any of claims 1-9, characterized in that the solar collector module further comprises a shut-off valve (34), the shut-off valve (34) being arranged in a communication line of the solar collector (31) and the third end of the water-water heat exchanger (33).