Thermal management circulation system of new energy vehicle

Abstract

The utility model discloses a heat management circulation system of a new energy vehicle, which comprises a front air-conditioning system, a rear air-conditioning system and a battery heat management system, the front air-conditioning system is used for adjusting the temperature of a driving area, the rear air-conditioning system is used for adjusting the temperature of a passenger area, and the battery heat management system is used for adjusting the temperature of a power battery box. And the front air-conditioning system exchanges heat with the battery heat management system through the heat exchanger. The structure of an existing new energy vehicle is improved, on the basis of an original front air-conditioning system, the parallel integrated plate exchanger and the battery heat management system are added, the parallel integrated plate exchanger and the battery heat management system share the compressor and the condenser with the front air-conditioning system, and battery cooling requirements under different working conditions can be met through automatic adjustment of the electromagnetic valve.

Description

TECHNICAL FIELD

[0001] The utility model belongs to new energy heat management technical field, concretely relates to a kind of new energy vehicle's heat management circulation system. BACKGROUND

[0002] Power battery is one of key components of pure electric vehicle, temperature has very remarkable influence on the overall performance and life of battery. To prolong the life of power battery, improve its battery chemical performance and energy efficiency, prolong vehicle cruising range, battery cooling management system needs to be reasonably matched. Cooling is carried out on battery under high temperature condition, heating is carried out under low temperature condition, temperature balance of battery is maintained, battery thermal runaway danger is eliminated, to improve the performance of electric vehicle.

[0003] Since current new energy 6-7 meter business car has two independent air conditioning systems in front and back, front air conditioning system is located at vehicle head, air conditioning outlet is located below driver's instrument panel;Back air conditioning system is located at roof, air conditioning outlet is located above passenger seat head. Existing front and back air conditioning systems can only provide cooling for passenger area, and do not consider the demand of battery cooling, if additional independent battery cooling system is added, it is difficult to arrange reasonably and orderly under the condition of limited space in vehicle. UTILITY MODEL CONTENT

[0004] In order to solve the above technical problems, the utility model provides a kind of new energy vehicle's heat management circulation system.

[0005] In order to achieve the above purpose, the technical scheme of the utility model is as follows:

[0006] The utility model discloses a kind of new energy vehicle's heat management circulation system, comprising: front air conditioning system and back air conditioning system, front air conditioning system is used to adjust temperature to driving area, back air conditioning system is used to adjust temperature to passenger area,

[0007] Heat management circulation system further includes: battery thermal management system, battery thermal management system is used to adjust temperature to power battery box;

[0008] Front air conditioning system includes: front air conditioning compressor, condenser, electromagnetic valve, thermal expansion valve, HVAC assembly, electronic expansion valve, heat exchanger, back gas temperature sensor and several refrigerant pipelines for refrigerant circulation;

[0009] Front air conditioning compressor, condenser, HVAC assembly, front air conditioning compressor are sequentially communicated by refrigerant pipeline, forming driving area temperature control loop;

[0010] And an electromagnetic valve and a thermal expansion valve are installed on a refrigerant pipeline in communication with the condenser in sequence along the refrigerant flow direction, and the electromagnetic valve and the thermal expansion valve are used for controlling the opening and closing of the refrigerant pipeline and the refrigerant flow to the HVAC assembly respectively.

[0011] The front air conditioner compressor, the condenser, the heat exchanger and the front air conditioner compressor are sequentially communicated through a refrigerant pipeline to form a battery temperature control loop one.

[0012] And an electronic expansion valve is installed on a refrigerant pipeline in communication with the condenser and the heat exchanger, and the electronic expansion valve is used for controlling the refrigerant flow to the heat exchanger.

[0013] A return air temperature sensor is installed on a refrigerant pipeline in communication with the heat exchanger and the front air conditioner compressor, and the return air temperature sensor is used for detecting the temperature of the refrigerant flowing out after heat exchange in the heat exchanger.

[0014] The battery thermal management system comprises a power battery box, a water pump, an inlet water temperature sensor, an outlet water temperature sensor and a plurality of cooling pipelines for cooling liquid flow.

[0015] The cooling pipe of the power battery box, the heat exchanger, the water pump and the cooling pipe of the power battery box are sequentially communicated through a cooling pipeline to form a battery temperature control loop two.

[0016] And the inlet water temperature sensor and the outlet water temperature sensor are installed on the cooling pipeline respectively, and the inlet water temperature sensor is used for detecting the temperature of the cooling liquid before entering the heat exchanger, and the outlet water temperature sensor is used for detecting the temperature of the cooling liquid flowing out after heat exchange in the heat exchanger.

[0017] The utility model discloses a thermal management circulating system of new energy vehicle, and the structure of the existing new energy vehicle is improved, and on the basis of the original front air conditioner system, parallel integrated plate exchanger and battery thermal management system are added, and the compressor and the condenser are shared with the front air conditioner system, and automatic adjustment can be realized through the electromagnetic valve, and the battery cooling demand of different working conditions can be realized.

[0018] On the basis of the above technical scheme, the following improvements can be made:

[0019] As a preferred scheme, the HVAC assembly comprises an evaporator core, an evaporative fan and a PTC heater.

[0020] By adopting the above preferred scheme, the HVAC assembly is used for the device for air conditioning, heating, ventilation, refrigeration, defrosting and air volume distribution in the vehicle.

[0021] As a preferred solution, a three-state pressure switch, an electromagnetic valve and a thermal expansion valve are sequentially arranged along the refrigerant flow direction on the refrigerant pipeline communicated with the condenser and the HVAC assembly, the three-state pressure switch is used for monitoring the pressure in the front air conditioning system, and when the pressure is too high or too low, the control circuit of the front air conditioning compressor is disconnected.

[0022] With the above preferred solution, the three-state pressure switch can monitor the pressure in the front air conditioning system, and when the pressure is too high or too low, the control circuit of the front air conditioning compressor is disconnected, thereby protecting the front air conditioning system.

[0023] As a preferred solution, a sight glass is arranged on any one or more refrigerant pipelines in the front air conditioning system, and the sight glass is used for observing the refrigerant flow in the refrigerant pipeline.

[0024] With the above preferred solution, the sight glass can be used to observe the refrigerant flow in the refrigerant pipeline, thereby facilitating subsequent maintenance.

[0025] As a preferred solution, a charging valve is arranged on any one or more refrigerant pipelines in the driver zone temperature control loop, and the charging valve is used for charging refrigerant.

[0026] With the above preferred solution, the charging valve can be used to facilitate charging of refrigerant and to facilitate monitoring of system pressure during subsequent maintenance.

[0027] As a preferred solution, a first charging valve and a second charging valve are arranged on two refrigerant pipelines in the driver zone temperature control loop, the first charging valve is arranged on the refrigerant pipeline communicated with the condenser and the HVAC assembly, and the second charging valve is arranged on the refrigerant pipeline communicated with the HVAC assembly and the front air conditioning compressor.

[0028] With the above preferred solution, the first charging valve is arranged on the refrigerant pipeline communicated with the HVAC assembly and used for refrigerant inflow, and the second charging valve is arranged on the refrigerant pipeline communicated with the HVAC assembly and used for refrigerant outflow, thereby facilitating refrigerant charging and maintenance from two positions.

[0029] As a preferred solution, a low-pressure sensor is arranged on the refrigerant pipeline communicated with the front air conditioning compressor and used for refrigerant return, and the low-pressure sensor is used for detecting the pressure of the refrigerant pipeline.

[0030] With the above preferred solution, the low-pressure sensor can sense the low pressure of the front air conditioning system, control the rotation speed of the front air conditioning compressor, and maintain the stability of the pressure when the ambient temperature changes, thereby maintaining the stability of the heat exchanger and the entire front air conditioning system.

[0031] As a preferred solution, a gas-liquid separator is arranged on the refrigerant pipeline communicated with the front air conditioning compressor and used for refrigerant return, and the gas-liquid separator is used for gas-liquid separation of the refrigerant about to enter the front air conditioning compressor.

[0032] With the above preferred scheme, after the refrigerant comes out of the heat exchanger and the HVAC assembly, it first enters the gas-liquid separator to perform gas-liquid separation, so as to prevent liquid refrigerant from entering the front air conditioner compressor and causing liquid hammer, thereby reducing the failure rate of the vehicle-mounted air conditioner.

[0033] As a preferred scheme, the battery thermal management system further comprises a water heating PTC, which is installed on the cooling pipeline and used to heat the coolant and warm up the power battery box in a low-temperature environment.

[0034] With the above preferred scheme, when the power battery box has a heating requirement, the coolant is heated to warm up the power battery box.

[0035] As a preferred scheme, the battery thermal management system further comprises an expansion water tank, which is used to supply the coolant to the battery temperature control circuit II.

[0036] With the above preferred scheme, the expansion water tank can accommodate the expansion amount of the coolant, and also functions as a pressure stabilizer and a coolant supply for the battery thermal management system. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0038] Figure 1 Fig. 1 is a structural schematic diagram of a thermal management circulating system according to an embodiment of the present application.

[0039] Figure 2 Fig. 2 is another structural schematic diagram of a thermal management circulating system according to an embodiment of the present application.

[0040] In the drawings: 11-front air conditioner compressor, 12-condenser, 13-solenoid valve, 14-thermal expansion valve, 15-HVAC assembly, 16-electronic expansion valve, 17-heat exchanger, 18-gas return temperature sensor, 19-three-state pressure switch, 110-liquid sight glass, 111-low pressure sensor, 21-power battery box, 22-water pump, 23-water inlet temperature sensor, 24-water outlet temperature sensor, 25-water heating PTC, 26-expansion water tank, 31-first charging valve, 32-second charging valve, 41-first gas-liquid separator, 42-second gas-liquid separator, 43-third gas-liquid separator. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present application will be described in detail below with reference to the drawings.

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0043] Meanwhile, the terms "first", "second", and the like are only used for distinguishing multiple configurations, rather than limiting the order of the configurations or other features.

[0044] In addition, the term "comprising" is an "open" term, which only means that the corresponding components exist, and should not be interpreted as excluding additional components.

[0045] In order to achieve the purpose of the present application, some embodiments of the thermal management circulating system of the new energy vehicle, as shown in the drawings, the thermal management circulating system comprises a front air conditioning system, a rear air conditioning system and a battery thermal management system, the front air conditioning system is used for temperature adjustment of a driving area, the rear air conditioning system is used for temperature adjustment of a passenger area, and the battery thermal management system is used for temperature adjustment of a power battery box. Figure 1

[0046] The front air conditioning system comprises a front air conditioning compressor 11, a condenser 12, a solenoid valve 13, a thermal expansion valve 14, an HVAC assembly 15 (Heating Ventilation and Air Conditioning), an electronic expansion valve 16, a heat exchanger 17, a return air temperature sensor 18 and a plurality of refrigerant pipelines for refrigerant (such as refrigerant) circulation;

[0047] The front air conditioning compressor 11, the condenser 12 and the HVAC assembly 15 are sequentially connected through the refrigerant pipeline, and the front air conditioning compressor 11 forms a driving area temperature control loop;

[0048] The solenoid valve 13 and the thermal expansion valve 14 are sequentially installed on the refrigerant pipeline connected between the condenser 12 and the HVAC assembly 15 along the refrigerant flow direction, and the solenoid valve 13 and the thermal expansion valve 14 are respectively used for controlling the on-off of the refrigerant pipeline and the refrigerant flow to the HVAC assembly 15;

[0049] The front air conditioning compressor 11, the condenser 12, the heat exchanger 17 and the front air conditioning compressor 11 are sequentially connected through the refrigerant pipeline, and form a battery temperature control loop one;

[0050] ​An electronic expansion valve 16 is installed in the refrigerant line connecting the condenser 12 and the heat exchanger 17, and is used to control the refrigerant flow to the heat exchanger 17.

[0051] A return air temperature sensor 18 is installed in the refrigerant line connecting the heat exchanger 17 and the front air conditioner compressor 11, and is used to detect the temperature of the refrigerant flowing out of the heat exchanger 17 after heat exchange.

[0052] The battery thermal management system comprises a power battery box 21, a water pump 22, an inlet water temperature sensor 23, an outlet water temperature sensor 24, and a plurality of cooling lines for cooling liquid flow.

[0053] The cooling pipe of the power battery box 21, the heat exchanger 17, the water pump 22, and the cooling pipe of the power battery box 21 are connected in sequence through the cooling line to form a second battery temperature control loop.

[0054] The inlet water temperature sensor 23 and the outlet water temperature sensor 24 are respectively installed on the cooling line, the inlet water temperature sensor 23 is used to detect the temperature of the cooling liquid before entering the heat exchanger 17, and the outlet water temperature sensor 24 is used to detect the temperature of the cooling liquid flowing out of the heat exchanger 17 after heat exchange.

[0055] The front air conditioner compressor 11 is equivalent to a vacuum pump when inhaling, which causes low pressure in the system, and inhales the low-temperature and low-pressure gaseous refrigerant in the evaporator; in the compression process, the gaseous refrigerant is compressed into a high-temperature and high-pressure state and input into the condenser 12, maintaining the circulation of the refrigerant in the refrigerant line of the front air conditioner system.

[0056] The condenser 12 is used to cool the high-temperature and high-pressure refrigerant vapor discharged by the front air conditioner compressor 11, so that it condenses into high-temperature and high-pressure liquid. The heat released by the refrigerant vapor is taken away by the surrounding air by the fan and discharged to the atmosphere.

[0057] Further, the condenser 12 is provided with a liquid storage and drying bottle. The liquid storage and drying bottle is used to dry the refrigerant, prevent water from causing ice blockage in the front air conditioner system, and store the high-pressure liquid refrigerant after liquefaction.

[0058] The above-mentioned HVAC assembly 15 comprises an evaporator core, an evaporator fan, and a PTC heater. The HVAC assembly 15 is used for air conditioning, heating, ventilation, refrigeration, defrosting, and air volume distribution in the vehicle. When used for refrigeration, the liquid refrigerant after pressure reduction is boiled and vaporized in the evaporator, absorbs the heat of the air around the evaporator surface to cool it, and the fan blows cold air into the vehicle to achieve the purpose of cooling.

[0059] The above-mentioned return air temperature sensor 18 is used to detect the temperature of the refrigerant side of the heat exchanger 17, to prevent the heat exchanger 17 from being damaged due to frost and ice caused by too low temperature of the refrigerant flowing through.

[0060] The thermal expansion valve 14 is installed on the evaporator inlet refrigerant pipeline, is a pressure sensing and temperature sensing automatic valve, adjusts and controls the refrigerant flow entering the evaporator by sensing the superheat of the evaporator, and ensures that the refrigerant is completely evaporated in the evaporator.

[0061] The heat exchanger 17 can be but is not limited to a plate heat exchanger 17. The plate heat exchanger 17 exchanges heat through metal plates, is stacked by metal plates with a certain corrugated shape, thin rectangular channels are formed between the metal plates, the refrigerant and the coolant flow in the channels, and heat is exchanged through the plate wall to cool the high-temperature coolant from the battery thermal management system.

[0062] The water pump 22 is used to drive the coolant to flow and increase the pressure of the coolant.

[0063] When the power battery box 21 has a cooling requirement (for example, when the vehicle is parked for charging), the electromagnetic valve 13 is closed to prevent the refrigerant from passing through the HVAC assembly 15. The electronic expansion valve 16 is opened, and the refrigerant passes through the heat exchanger 17 to exchange heat with the battery thermal management system.

[0064] The utility model discloses a thermal management circulating system of new energy vehicle, and improves the structure of the existing new energy vehicle, increases parallel integrated plate exchanger and battery thermal management system on the basis of the original front air conditioning system, shares front air conditioning compressor 11 and condenser 12 with the front air conditioning system, and can realize the battery cooling requirement of different working conditions through the automatic regulation of electromagnetic valve 13. The rear air conditioning system of the utility model exists as a separate system, and does not affect the temperature control requirement of the passenger area.

[0065] In order to further optimize the implementation effect of the utility model, in some other embodiments, the remaining features are the same, and the difference lies in that a three-state pressure switch 19, an electromagnetic valve 13 and a thermal expansion valve 14 are sequentially installed on the refrigerant pipeline communicated between the condenser 12 and the HVAC assembly 15 along the refrigerant flow direction, and the three-state pressure switch 19 is used for monitoring the pressure in the front air conditioning system, and the control circuit of the front air conditioning compressor 11 is disconnected when the pressure is too high or too low.

[0066] By adopting the preferred scheme, the three-state pressure switch 19 can monitor the pressure in the front air conditioning system, and the control circuit of the front air conditioning compressor 11 is disconnected when the pressure is too high or too low, so that the front air conditioning system is protected.

[0067] On the basis of the above-mentioned embodiments, a sight glass 110 is installed on any one or more refrigerant pipelines in the front air conditioning system, and the sight glass 110 is used for observing the refrigerant flow in the refrigerant pipeline.

[0068] By adopting the preferred scheme, the refrigerant flow in the refrigerant pipeline can be observed through the sight glass 110, and subsequent maintenance is facilitated.

[0069] On the basis of the above-mentioned embodiments, a charging valve is installed on any one or more refrigerant pipelines in the driving area temperature control circuit, and the charging valve is used for charging refrigerant.

[0070] With the above-mentioned preferred scheme, the refrigerant can be conveniently charged through the charging valve, and the system pressure can be monitored during subsequent maintenance.

[0071] On the basis of the above-mentioned embodiments, a first charging valve 31 and a second charging valve 32 are respectively installed on two refrigerant pipelines in the driving area temperature control circuit, the first charging valve 31 is installed on a refrigerant pipeline through which the condenser 12 communicates with the HVAC assembly 15, and the second charging valve 32 is installed on a refrigerant pipeline through which the HVAC assembly 15 communicates with the front air conditioning compressor 11.

[0072] With the above-mentioned preferred scheme, the first charging valve 31 is installed on a refrigerant pipeline through which the HVAC assembly 15 communicates for refrigerant inflow, and the second charging valve 32 is installed on a refrigerant pipeline through which the HVAC assembly 15 communicates for refrigerant outflow, so that the refrigerant charging and maintenance can be more conveniently performed from two positions.

[0073] In summary, the three-state pressure switch 19, the sight glass 110, the first charging valve 31, the electromagnetic valve 13, and the thermal expansion valve 14 are sequentially installed on the refrigerant pipeline through which the condenser 12 communicates with the HVAC assembly 15 in the direction of refrigerant flow.

[0074] On the basis of the above-mentioned embodiments, a low-pressure sensor 111 is installed on a refrigerant pipeline through which the front air conditioning compressor 11 communicates for refrigerant return, and the low-pressure sensor 111 is used for detecting the pressure of the refrigerant pipeline.

[0075] With the above-mentioned preferred scheme, the low-pressure sensor 111 can sense the low pressure of the front air conditioning system, control the rotation speed of the front air conditioning compressor 11, and maintain the stability of the pressure when the external environment temperature changes, so as to maintain the stability of the pressure of the heat exchanger 17 and the entire front air conditioning system.

[0076] On the basis of the above-mentioned embodiments, a gas-liquid separator is installed on the refrigerant pipeline through which the front air conditioning compressor 11 communicates for refrigerant return, and the gas-liquid separator is used for gas-liquid separation of the refrigerant about to enter the front air conditioning compressor 11.

[0077] With the above-mentioned preferred scheme, after the refrigerant comes out of the heat exchanger 17 and the HVAC assembly 15, the refrigerant first enters the gas-liquid separator for gas-liquid separation, so as to prevent the liquid refrigerant from entering the front air conditioning compressor 11 to cause liquid hammer and reduce the failure rate of the vehicle-mounted air conditioner.

[0078] Further, in some specific embodiments, as Figure 2As shown, a first gas-liquid separator 41 is installed on a refrigerant pipeline for refrigerant return in communication with the front air conditioner compressor 11, close to the front air conditioner compressor 11.

[0079] A second gas-liquid separator 42 is installed on a refrigerant pipeline for refrigerant outflow in communication with the heat exchanger 17, close to the heat exchanger 17.

[0080] A third gas-liquid separator 43 is installed on a refrigerant pipeline for refrigerant outflow in communication with the HVAC assembly 15, close to the HVAC assembly 15.

[0081] With the above scheme, the three gas-liquid separators can effectively prevent liquid refrigerant from entering the front air conditioner compressor 11.

[0082] And on the refrigerant pipeline for refrigerant return in communication with the front air conditioner compressor 11, a sight glass 110 can also be installed, which is more convenient for detection.

[0083] In order to further optimize the implementation effect of the utility model, in some other embodiments, the remaining features are the same, and the difference lies in that the battery thermal management system further comprises: a water heating PTC 25, the water heating PTC 25 is installed on the cooling pipeline, and the water heating PTC 25 is used to heat the cooling liquid and warm up the power battery box 21 in a low temperature environment.

[0084] With the above preferred scheme, when the power battery box 21 has heating demand, the cooling liquid is heated to warm up the power battery box 21.

[0085] On the basis of the above embodiment, the battery thermal management system further comprises: an expansion water tank 26, the expansion water tank 26 is used to supply cooling liquid for the battery temperature control circuit two.

[0086] With the above preferred scheme, the expansion water tank 26 can accommodate the expansion amount of the cooling liquid, and also plays the role of pressure setting and supplying cooling liquid for the battery thermal management system.

[0087] In the description of the utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the utility model.

[0088] In the utility model, unless another definite provision and limitation, the term "installation", "arrangement", "connection", "fix", "screw joint" and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two element inside's intercommunication or two element's mutual action relation, unless another definite limitation, for the ordinary skill in the art personnel, can understand the above-mentioned term in the utility model's specific meaning according to specific circumstances.

[0089] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, and the person skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the claimed utility model, and the scope of protection of the utility model is defined by the appended claims and their equivalents.

[0090] The control mode of the utility model is controlled by manually starting and closing the switch, and the wiring diagram of the power element and the provision of the power supply are well known in the art, and the utility model is mainly used to protect the mechanical device, so the control mode and wiring arrangement of the utility model will not be explained in detail.

Claims

1. Thermal management cycle system for new energy vehicles, including: A front air conditioning system and a rear air conditioning system, wherein the front air conditioning system is used to adjust the temperature of the driving area and the rear air conditioning system is used to adjust the temperature of the passenger area, characterized in that: The thermal management circulation system further includes: a battery thermal management system, which is used to regulate the temperature of the power battery box; The front air conditioning system includes: a front air conditioning compressor, a condenser, a solenoid valve, a thermal expansion valve, an HVAC assembly, an electronic expansion valve, a heat exchanger, a return air temperature sensor, and several refrigerant pipelines for refrigerant circulation; The front air-conditioning compressor, condenser, HVAC assembly, and front air-conditioning compressor are sequentially connected through a refrigerant pipeline to form a driving area temperature control circuit; A solenoid valve and a thermal expansion valve are sequentially installed on the refrigerant pipeline connecting the condenser and the HVAC assembly along the refrigerant flow direction, and the solenoid valve and the thermal expansion valve are used to control the on-off of the refrigerant pipeline and the refrigerant flow to the HVAC assembly respectively; The front air-conditioning compressor, condenser, heat exchanger, and front air-conditioning compressor are connected in sequence through a refrigerant pipeline to form a battery temperature control loop 1; An electronic expansion valve is installed on the refrigerant pipeline connecting the condenser and the heat exchanger, and the electronic expansion valve is used to control the flow of refrigerant to the heat exchanger; A return air temperature sensor is installed on the refrigerant pipeline connecting the heat exchanger and the front air-conditioning compressor, and the return air temperature sensor is used to detect the temperature of the refrigerant flowing out of the heat exchanger after heat exchange; The battery thermal management system includes: a power battery box, a water pump, a water inlet temperature sensor, a water outlet temperature sensor, and several cooling pipes for coolant circulation; The cooling pipe of the power battery box, the heat exchanger, the water pump, and the cooling pipe of the power battery box are connected in sequence through a cooling pipeline to form a second battery temperature control loop; The water inlet temperature sensor and the water outlet temperature sensor are respectively installed on the cooling pipeline. The water inlet temperature sensor is used to detect the temperature of the coolant before entering the heat exchanger, and the water outlet temperature sensor is used to detect the temperature of the coolant flowing out of the heat exchanger after heat exchange.

2. The thermal management cycle system according to claim 1, characterized in that: The HVAC assembly includes an evaporator core, an evaporator fan, and a PTC heater.

3. The thermal management cycle system according to claim 1, characterized in that: A three-state pressure switch, a solenoid valve and a thermal expansion valve are installed in sequence along the refrigerant flow direction on the refrigerant pipeline connecting the condenser and the HVAC assembly. The three-state pressure switch is used to monitor the pressure in the front air-conditioning system. When the pressure is too high or too low, the control circuit of the front air-conditioning compressor is disconnected.

4. The thermal management cycle system according to claim 1, characterized in that: A sight glass is installed on any one or more refrigerant pipelines in the front air-conditioning system, and the sight glass is used to observe the flow of refrigerant in the refrigerant pipeline.

5. The thermal management cycle system according to claim 1, characterized in that: A charging valve is installed on any one or more refrigerant pipelines in the driving area temperature control circuit, and the charging valve is used to charge the refrigerant.

6. The thermal management cycle system according to claim 5, characterized in that: A first charging valve and a second charging valve are respectively installed on the two refrigerant pipelines in the driving area temperature control circuit. The first charging valve is installed on the refrigerant pipeline connecting the condenser and the HVAC assembly, and the second charging valve is installed on the refrigerant pipeline connecting the HVAC assembly and the front air-conditioning compressor.

7. The thermal management cycle system according to claim 1, characterized in that: A low pressure sensor is installed on a refrigerant pipeline for refrigerant return that is in communication with the front air-conditioning compressor. The low pressure sensor is used to detect the pressure of the refrigerant pipeline.

8. The thermal management cycle system according to claim 1, characterized in that: A gas-liquid separator is installed on the refrigerant pipeline for refrigerant return connected to the front air-conditioning compressor, for performing gas-liquid separation on the refrigerant about to enter the front air-conditioning compressor.

9. The thermal management circulation system according to any one of claims 1 to 8, characterized in that: The battery thermal management system further includes a water-heating PTC installed on a cooling pipeline. The water-heating PTC is used to heat the coolant and thus the power battery box in a low-temperature environment.

10. The thermal management circulation system according to any one of claims 1 to 8, characterized in that: The battery thermal management system further includes an expansion water tank, which is used to supply coolant to the second battery temperature control loop.

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