Novel high-efficiency new energy vehicle thermal management system

Abstract

The application discloses a novel high-efficiency new energy automobile thermal management system, which comprises a refrigeration circulation loop and a heat pump heating circulation loop; the refrigeration circulation loop comprises a front-end cooling module, a heat exchanger, an air conditioner host, a gas-liquid separator, an electric compressor with a gas supplement port and a first water condenser which are sequentially connected in circulation; the heat exchanger is connected with the electric compressor with the gas supplement port and a combined heat exchanger respectively; the combined heat exchanger is connected with the gas-liquid separator and a battery heat dissipation loop simultaneously; the heat pump heating circulation loop comprises the front-end cooling module, the first water condenser, the gas-liquid separator, the electric compressor with the gas supplement port, a second water condenser and the heat exchanger which are sequentially connected in circulation; the heat exchanger is connected with the electric compressor with the gas supplement port through a pipeline; the second water condenser is sequentially connected with the combined heat exchanger, the air conditioner host and a first circulating pump; and the combined heat exchanger is connected with the battery heat dissipation loop. The application has the advantages of compact structure and high efficiency of the thermal management system.

Description

TECHNICAL FIELD

[0001] The application relates to a heat management system, in particular to a novel high-efficiency new energy vehicle heat management system. BACKGROUND

[0002] New energy electric vehicles face the problem of high power consumption for heating in winter, which seriously affects the cruising range. Air conditioning heat pump systems are widely researched and applied due to high efficiency and energy saving, but the heat pump system also has problems of low-temperature starting and insufficient heating performance due to the characteristics of the currently used refrigerant. The heat management system of an electric new energy vehicle directly affects the safety and service life of the battery and the cruising range of the electric vehicle.

[0003] The current mainstream electric vehicle heat management basically adopts an air conditioning heat pump system to realize the refrigeration and heating requirements of the passenger compartment and the battery, but the heat management system is relatively simple, the subsystems are relatively independent, the system COP is low, and the structure layout is bloated. The heat pump utilization rate of the prior art is low, and is only used for heating in the cab and does not participate in battery heat management, and the system COP is low. The heat pump system is difficult to start at low temperature, and the heating performance is insufficient, and the COP is low. The heat management system does not consider the low-temperature circulation system, and there is no waste heat utilization. SUMMARY

[0004] The application aims to provide a novel high-efficiency new energy vehicle heat management system to solve the problems in the prior art, which has the advantages of compact structure and efficient heat management system.

[0005] The application provides a novel high-efficiency new energy vehicle heat management system, which comprises a refrigeration circulation loop and a heat pump heating circulation loop. The refrigeration circulation loop comprises a front-end cooling module, a heat exchanger, an air conditioning host, a gas-liquid separator, an electric compressor with a gas supplement port and a first water condenser which are sequentially connected in circulation through pipelines. The heat exchanger is further connected with the electric compressor with the gas supplement port and a combined heat exchanger through pipelines. The combined heat exchanger is connected with the gas-liquid separator and a battery heat dissipation loop. The heat pump heating circulation loop comprises the front-end cooling module, the first water condenser, the gas-liquid separator, the electric compressor with the gas supplement port, a second water condenser and the heat exchanger which are sequentially connected in circulation through pipelines. The heat exchanger is connected with the electric compressor with the gas supplement port through a pipeline. The second water condenser is further connected with the combined heat exchanger, the air conditioning host and a first circulating pump in sequence through pipelines. The combined heat exchanger is connected with the battery heat dissipation loop.

[0006] In the new high-efficiency thermal management system for new energy vehicles, preferably, the front-end cooling module comprises a front-end condenser and a radiator, the first water condenser has four interfaces, the first interface of the first water condenser is connected with the front-end condenser through a pipeline, in the refrigeration cycle loop, the second interface of the first water condenser is connected with the outlet end of the electric compressor with a gas supplement port through a pipeline, and the second interface of the first water condenser is provided with a first electromagnetic valve on the connecting pipeline of the electric compressor with a gas supplement port.

[0007] In the new high-efficiency thermal management system for new energy vehicles, preferably, the heat exchanger has four interfaces, the first interface of the heat exchanger is connected with the electric compressor with a gas supplement port through a pipeline, the second interface of the heat exchanger is connected with a main pipeline, the main pipeline is connected with the third interface of the heat exchanger through a sub-pipeline, and the sub-pipeline is provided with a first electronic expansion valve; in the refrigeration cycle loop, the front-end condenser is connected with the main pipeline through a pipeline, and the fourth interface of the heat exchanger is connected with the air conditioner main unit and the combined heat exchanger through pipelines respectively; in the heat pump heating cycle loop, the front-end condenser is connected with the fourth interface of the heat exchanger through a pipeline, and the second water condenser is connected with the main pipeline through a pipeline.

[0008] In the new high-efficiency thermal management system for new energy vehicles, preferably, the second water condenser has four interfaces, the first interface of the second water condenser is connected with the electric compressor with a gas supplement port through a pipeline, the second interface of the second water condenser is connected with the main pipeline through a pipeline, the third interface of the second water condenser is connected with the combined heat exchanger through a pipeline, and the fourth interface of the second water condenser is connected with the first circulating pump through a pipeline.

[0009] In the new high-efficiency thermal management system for new energy vehicles, preferably, the second water condenser is connected with a high-pressure heater in parallel, one end of the high-pressure heater is connected with the liquid outlet end of the first circulating pump through a pipeline, and the other end of the high-pressure heater is connected with the third interface of the second water condenser through a pipeline.

[0010] In the new high-efficiency new energy vehicle thermal management system, preferably, the battery heat dissipation circuit comprises a second circulating pump, a battery pack, a vehicle auxiliary controller and a control valve connected in sequence by pipelines, a first three-way valve and a second three-way valve are arranged on the pipeline connecting the second circulating pump and the battery pack, the combined heat exchanger has three inlets and three outlets, the first three-way valve is connected with the first inlet of the combined heat exchanger through a pipeline, the second three-way valve is connected with the first outlet of the combined heat exchanger through a pipeline, the second inlet of the combined heat exchanger is connected with the fourth interface of the heat exchanger through a pipeline, the second outlet of the combined heat exchanger is connected with the gas-liquid separator through a pipeline, the third inlet of the combined heat exchanger is connected with the third interface of the second water condenser through a pipeline, and the third outlet of the combined heat exchanger is connected with the air conditioner main machine through a pipeline.

[0011] In the new high-efficiency new energy vehicle thermal management system, preferably, it further comprises a low-temperature circulation loop, the low-temperature circulation loop comprises the radiator, the first water condenser, the control valve, a third circulating pump and a motor module connected in sequence by pipelines, the outlet end of the radiator is connected with the third interface of the first water condenser through a pipeline and a third three-way valve, the control valve has four interfaces, the first interface of the control valve is connected with the fourth interface of the first water condenser through a pipeline, the second interface of the control valve is connected with the liquid inlet end of the third circulating pump through a pipeline, the third interface of the control valve is connected with the vehicle auxiliary controller through a pipeline, and the fourth interface of the control valve is connected with the liquid inlet end of the second circulating pump through a pipeline.

[0012] In the new high-efficiency new energy vehicle thermal management system, preferably, it further comprises a waste heat recovery circulation loop, the waste heat recovery circulation loop comprises the radiator, the first water condenser, the second circulating pump, the first three-way valve, the second three-way valve, the battery pack, the vehicle auxiliary controller, the third circulating pump and the motor module connected in sequence by pipelines.

[0013] In the new high-efficiency new energy vehicle thermal management system, preferably, the motor module comprises a front wheel motor and a rear wheel motor.

[0014] Compared with the prior art, the application comprises: a refrigeration cycle loop comprising a front-end cooling module, a heat exchanger, an air conditioner host, a gas-liquid separator, an electric compressor with a gas supplement port and a first water condenser connected in sequence through pipelines, the heat exchanger is further connected with the electric compressor with a gas supplement port and a combined heat exchanger through pipelines, and the combined heat exchanger is connected with the gas-liquid separator and a battery heat dissipation loop; a heat pump heating cycle loop comprising a front-end cooling module, a first water condenser, a gas-liquid separator, an electric compressor with a gas supplement port, a second water condenser and a heat exchanger connected in sequence through pipelines, the heat exchanger is connected with the electric compressor with a gas supplement port through a pipeline, and the second water condenser is further connected with a combined heat exchanger, an air conditioner host and a first circulating pump in sequence through pipelines, and the combined heat exchanger is connected with the battery heat dissipation loop. The refrigeration cycle loop can meet the refrigeration demand of the cab and the heat dissipation demand of the battery, the heat pump heating cycle loop can meet the heating demand of the cab and the heating demand of the battery, the first water condenser and the second water condenser are used in the heat management system, and the heat exchange efficiency of the refrigeration and heating systems is improved. The heat management system of the application is efficient, compact in structure and saves layout space. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the system diagram of the whole application;

[0016] Figure 2 is the system diagram of the refrigeration cycle loop and the battery heat dissipation loop;

[0017] Figure 3 is the system diagram of the heat pump heating cycle loop and the battery heat dissipation loop;

[0018] Figure 4 is the system diagram of the low-temperature cycle loop;

[0019] Figure 5 is the system diagram of the waste heat recovery cycle loop.

[0020] Legend: front-end cooling module 1, heat exchanger 2, air conditioner host 3, gas-liquid separator 4, electric compressor 5 with air supplement port, first water condenser 6, combined heat exchanger 7, front-end condenser 8, radiator 9, first electromagnetic valve 10, third electromagnetic valve 11, main pipeline 12, sub-pipeline 13, first electronic expansion valve 14, high-pressure heater 15, second circulating pump 16, battery pack 17, vehicle auxiliary controller 18, control valve 19, first three-way valve 20, second three-way valve 21, front wheel motor 22, rear wheel motor 23, second water condenser 24, first circulating pump 25, third circulating pump 26, third three-way valve 27, second electronic expansion valve 28, fourth electromagnetic valve 29, third electronic expansion valve 30, fifth electromagnetic valve 31, fourth three-way valve 32, first expansion water tank 33, four-way valve 34, fourth electronic expansion valve 35, second electromagnetic valve 36, sixth electromagnetic valve 37, seventh electromagnetic valve 38, fifth three-way valve 39, vehicle charging module 40, sixth three-way valve 41, second expansion water tank 42, seventh three-way valve 43. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described 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. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0022] Embodiments of the present application: as shown in Figure 1 and Figure 2 A novel high-efficiency new energy vehicle thermal management system, comprising a refrigeration cycle circuit, a heat pump heating cycle circuit and a battery heat dissipation circuit, wherein the refrigeration cycle circuit comprises a front-end cooling module 1, a heat exchanger 2, an air conditioner host 3, a gas-liquid separator 4, an electric compressor 5 with an air supplement port and a first water condenser 6 connected in sequence by pipelines, the heat exchanger 2 is further connected with the electric compressor 5 with an air supplement port and a combined heat exchanger 7 through pipelines, and the combined heat exchanger 7 is connected with the gas-liquid separator 4 and the battery heat dissipation circuit.

[0023] Specifically, the front-end cooling module 1 comprises a front-end condenser 8 and a radiator 9, the first water condenser 6 has four interfaces, a first interface of the first water condenser 6 is connected with the front-end condenser 8 through a pipeline, a second interface of the first water condenser 6 is connected with an outlet end of the electric compressor 5 with an air supplement port through a pipeline, and a first electromagnetic valve 10 is arranged on a connecting pipeline between the second interface of the first water condenser 6 and the electric compressor 5 with an air supplement port.

[0024] The heat exchanger 2 has four ports. The first port of the heat exchanger 2 is connected to the electric compressor 5 with a gas supply port via a pipeline. A one-way valve is installed on the connecting pipeline between the two. The second port of the heat exchanger 2 is connected to the main pipeline 12. The main pipeline 12 is connected to the third port of the heat exchanger 2 via a sub-pipeline 13. A first electronic expansion valve 14 is installed on the sub-pipeline 13. The front-end condenser 8 is connected to the main pipeline 12 via a pipeline. A one-way valve is installed on the connecting pipeline between the two. The fourth port of the heat exchanger 2 is connected to the air conditioning unit 3 and the combined heat exchanger 7 via pipelines. A second electronic expansion valve 28 and a fourth solenoid valve 29 are installed on the connecting pipeline between the fourth port of the heat exchanger 2 and the air conditioning unit 3. A third electronic expansion valve 30 and a fifth solenoid valve 31 are installed on the connecting pipeline between the fourth port of the heat exchanger 2 and the combined heat exchanger 7.

[0025] Furthermore, the battery cooling circuit includes a second circulation pump 16, a battery pack 17, a vehicle auxiliary controller 18, and a control valve 19 connected sequentially via pipelines. A first three-way valve 20 and a second three-way valve 21 are installed on the pipeline connecting the second circulation pump 16 and the battery pack 17. The combined heat exchanger 7 has three inlets and three outlets. The first three-way valve 20 is connected to the first inlet of the combined heat exchanger 7 via a pipeline, and the second three-way valve 21 is connected to the first outlet of the combined heat exchanger 7 via a pipeline. The second inlet of the combined heat exchanger 7 is connected to the fourth interface of the heat exchanger 2 via a pipeline, and the second outlet of the combined heat exchanger 7 is connected to the gas-liquid separator 4 via a pipeline. A fourth three-way valve 32 is installed on the pipeline connecting the second circulation pump 16 and the control valve 19. The fourth three-way valve 32 is connected to the first expansion tank 33 via a pipeline, and a four-way valve 34 is installed on the pipeline connecting the two.

[0026] The following details the heat pump heating cycle circuit, such as... Figure 3 As shown, the circuit specifically includes a front-end cooling module 1, a first water condenser 6, a gas-liquid separator 4, an electric compressor 5 with a gas inlet 5, a second water condenser 24, and a heat exchanger 2, which are connected in sequence through pipelines. The heat exchanger 2 is connected to the electric compressor 5 with a gas inlet 5 through pipelines. The second water condenser 24 is also connected to a combined heat exchanger 7, an air conditioning unit 3, and a first circulating pump 25 in sequence through pipelines. The combined heat exchanger 7 is connected to the battery heat dissipation circuit.

[0027] Specifically, in the heat pump heating cycle loop, the second port of the first water condenser 6 is connected to the inlet end of the gas-liquid separator 4 through a pipeline, and a third solenoid valve 11 is provided on the connecting pipeline between the second port of the first water condenser 6 and the gas-liquid separator 4; the front-end condenser 8 in the front-end cooling module 1 is connected to the fourth port of the heat exchanger 2 through a pipeline, and a fourth electronic expansion valve 35 is provided on the connecting pipeline.

[0028] Further, the second water condenser 24 has four interfaces, the first interface of the second water condenser 24 is connected with the outlet end of the electric compressor 5 with a gas supplement port through a pipeline, and a second electromagnetic valve 36 is arranged on the connecting pipeline of the first interface of the second water condenser 24 and the electric compressor 5 with a gas supplement port, the second interface of the second water condenser 24 is connected with the main pipeline 12 through a pipeline, and a one-way valve is arranged on the connecting pipeline, the third interface of the second water condenser 24 is connected with the third inlet of the combined heat exchanger 7 through a pipeline, the fourth interface of the second water condenser 24 is connected with the outlet end of the first circulating pump 25 through a pipeline, and a sixth electromagnetic valve 37 is arranged on the connecting pipeline of the fourth interface and the first circulating pump 25, and the third outlet of the combined heat exchanger 7 is connected with the air conditioner main machine 3 through a pipeline.

[0029] The second water condenser 24 is connected with a high-pressure heater 15 in parallel, one end of the high-pressure heater 15 is connected with the outlet end of the first circulating pump 25 through a pipeline, and a seventh electromagnetic valve 38 is arranged on the connecting pipeline, and the other end of the high-pressure heater 15 is connected with the third interface of the second water condenser 24 through a pipeline.

[0030] In a preferred embodiment, as shown in Figure 4 The low-temperature circulating loop further includes a radiator 9, a first water condenser 6, a control valve 19, a third circulating pump 26 and a motor module which are sequentially and circularly connected through pipelines, the outlet end of the radiator 9 is connected with the third interface of the first water condenser 6 through a pipeline and a third three-way valve 27, the control valve 19 has four interfaces, the first interface of the control valve 19 is connected with the fourth interface of the first water condenser 6 through a pipeline, and the connecting pipeline is also connected with a four-way valve 34, the second interface of the control valve 19 is connected with the liquid inlet end of the third circulating pump 26 through a pipeline, the third interface of the control valve 19 is connected with the vehicle auxiliary controller 18 through a pipeline, and the fourth interface of the control valve 19 is connected with the liquid inlet end of the second circulating pump 16 through a pipeline.

[0031] The motor module includes a front wheel motor 22 and a rear wheel motor 23. The liquid outlet end of the third circulating pump 26 is connected with the cooling mechanisms of the front wheel motor 22 and the rear wheel motor 23 through a fifth three-way valve 39, and the connecting pipeline of the rear wheel motor 23 and the fifth three-way valve 39 is also connected with a vehicle charging module 40, and the liquid outlet ends of the cooling mechanisms of the front wheel motor 22 and the rear wheel motor 23 are gathered through a sixth three-way valve 41 and then connected with the interface end of the radiator 9.

[0032] Preferably, a seventh three-way valve 43 is arranged on the connecting pipeline of the sixth three-way valve 41 and the radiator 9, and the seventh three-way valve 43 is connected with the third three-way valve 27 through a pipeline. The arrangement of the bypass mainly plays a protection role, when the radiator 9 is blocked and fails, the radiator of the motor module can be cooled through the bypass, but the cooling efficiency will be reduced.

[0033] In another preferred embodiment, as shown in the figure, a waste heat recovery cycle loop is further included, which comprises the radiator 9, the first water condenser 6, the second circulating pump 16, the first three-way valve 20, the second three-way valve 21, the battery pack 17, the vehicle auxiliary controller 18, the third circulating pump 26 and the motor module, which are sequentially and circularly communicated by pipelines. Figure 5

[0034] The working principles of the various loops will be described in detail as follows:

[0035] When the cockpit needs to be cooled, the first electromagnetic valve 10 is opened, and the second electromagnetic valve 36, the third electromagnetic valve 11 and the fifth electromagnetic valve 31 are closed. At this time, the refrigeration cycle refrigerant flow is the front-end condenser 8--the heat exchanger 2--the air conditioning main unit 3--the gas-liquid separator 4--the electric compressor 5 with a gas supplement port--the first water condenser 6--the front-end condenser 8.

[0036] The system pre-cools the high-temperature and high-pressure gas of the compressor by setting the first water condenser 6, thereby improving the heat exchange efficiency of the front-end condenser 8 and reducing the volume of the front-end condenser 8. The refrigerant of the system is R134a. The compressor uses gas supplement and enthalpy increase to improve the supercooling degree and improve the COP of the system.

[0037] When the battery pack 17 and the vehicle auxiliary controller 18 need to be cooled, the first electromagnetic valve 10 is opened, and the second electromagnetic valve 36, the third electromagnetic valve 11 and the fourth electromagnetic valve 29 are closed. At this time, the refrigeration cycle refrigerant flow is the front-end condenser 8--the heat exchanger 2--the combined heat exchanger 7--the gas-liquid separator 4--the electric compressor 5 with a gas supplement port--the first water condenser 6--the front-end condenser 8. At the same time, the battery cooling loop is cooled by the cooling liquid. The first expansion water tank 33 is filled with cooling liquid. The cooling liquid enters the battery cooling loop through the four-way valve 34 and the fourth three-way valve 32. At this time, the second circulating pump 16 of the battery cooling loop works. The third interface and the fourth interface of the control valve 19 are communicated. Under the action of the second circulating pump 16, the cooling liquid flows through the second circulating pump 16--the first three-way valve 20--the combined heat exchanger 7--the second three-way valve 21--the battery pack 17--the vehicle auxiliary controller 18--the control valve 19--the fourth three-way valve 32 back to the second circulating pump 16 in sequence. The cooling liquid is heat exchanged and cooled in the combined heat exchanger 7, thereby realizing the cooling of the battery pack 17 and the vehicle auxiliary controller 18.

[0038] When the cockpit, the battery pack 17 and the vehicle auxiliary controller 18 need to be cooled at the same time, the fourth electromagnetic valve 29 and the fifth electromagnetic valve 31 are started at the same time.

[0039] ​When the cockpit and the battery pack 17 need to be heated, the third solenoid valve 11, the second solenoid valve 36, the sixth solenoid valve 37 and the seventh solenoid valve 38 are opened, the first solenoid valve 10, the fourth solenoid valve 29 and the fifth solenoid valve 31 are closed, the second electronic expansion valve 28 and the third electronic expansion valve 30 are closed, and the heat pump heating cycle refrigerant circuit flow is: the front end condenser 8--the first water condenser 6--the gas-liquid separator 4--the electric compressor 5 with a gas supplement port--the second water condenser 24--the heat exchanger 2 back to the front end condenser 8; at the same time, under the action of the first circulating pump 25, the cooling liquid exchanges heat with the second water condenser 24 to be heated, and provides heat for the cockpit and the combined heat exchanger 7, and the specific circulation flow is: the first circulating pump 25--the second water condenser 24--the combined heat exchanger 7--the air conditioning main machine 3 and then back to the first circulating pump 25, the connecting pipeline of the air conditioning main machine 3 and the first circulating pump 25 is connected with the second expansion tank 42 through the sixth three-way valve 41, and the second expansion tank 42 is provided with antifreeze.

[0040] The combined heat exchanger 7 exchanges heat with the antifreeze in the battery heat dissipation circuit, so that the battery pack 17 and the vehicle auxiliary controller 18 are heated.

[0041] In addition, the high-pressure heater 15 is arranged in the system, and whether the high-pressure heater 15 is applied can be controlled through the seventh solenoid valve 38, and the high-pressure heater 15 is used for auxiliary heat supplement.

[0042] The low-temperature circulation system is used for heat dissipation of the motor module and the charging module, when the motor module and the charging module need to be cooled, the first interface and the second interface of the control valve 19 are connected, the third circulating pump 26 works, and the radiator 9 cools the cooling liquid in the pipeline, and when the cooling liquid circulates to the front wheel motor 22, the rear wheel motor 23 and the vehicle charging module 40, the cooling is realized.

[0043] The waste heat recovery system recovers the heat generated by the front wheel motor 22, the rear wheel motor 23 and the vehicle charging module 40, circulates the heat to the battery pack 17 and the vehicle auxiliary controller 18 through the cooling liquid, and provides heat for the two to be heated, and this function is mainly used in winter.

[0044] The above describes the structure, features and effects of the application according to the embodiments shown in the drawings, and the above description is only the preferred embodiments of the application, but the application is not limited to the embodiments shown in the drawings, any changes or modifications made according to the concept of the application, or equivalent embodiments with equivalent changes, as long as they are within the scope of the application, should be within the protection scope of the application.

Claims

1. A novel high-efficiency new energy vehicle thermal management system, characterized in that, The application relates to a refrigeration and heating system for a vehicle, which comprises a refrigeration cycle circuit and a heating cycle circuit. The refrigeration cycle circuit comprises a front-end cooling module (1), a heat exchanger (2), an air conditioner host (3), a gas-liquid separator (4), a motor-driven compressor (5) with a gas supplement port and a first water condenser (6) which are sequentially connected through pipelines; the heat exchanger (2) is further connected with the motor-driven compressor (5) and a combined heat exchanger (7) through pipelines; the combined heat exchanger (7) is connected with the gas-liquid separator (4) and a battery heat dissipation circuit. The heating cycle circuit comprises the front-end cooling module (1), the first water condenser (6), the gas-liquid separator (4), the motor-driven compressor (5) with a gas supplement port, a second water condenser (24) and the heat exchanger (2) which are sequentially connected through pipelines; the heat exchanger (2) is connected with the motor-driven compressor (5) through a pipeline; the second water condenser (24) is further connected with the combined heat exchanger (7), the air conditioner host (3) and a first circulating pump (25) through pipelines in sequence; the combined heat exchanger (7) is connected with the battery heat dissipation circuit. The front-end cooling module (1) comprises a front-end condenser (8) and a radiator (9); the first water condenser (6) has four interfaces; a first interface of the first water condenser (6) is connected with the front-end condenser (8) through a pipeline; in the refrigeration cycle circuit, a second interface of the first water condenser (6) is connected with an outlet end of the motor-driven compressor (5) through a pipeline; a first electromagnetic valve (10) is arranged on the connecting pipeline between the second interface of the first water condenser (6) and the motor-driven compressor (5); in the heating cycle circuit, the second interface of the first water condenser (6) is connected with an inlet end of the gas-liquid separator (4) through a pipeline; a third electromagnetic valve (11) is arranged on the connecting pipeline between the second interface of the first water condenser (6) and the gas-liquid separator (4). The battery heat dissipation circuit comprises a second circulating pump (16), a battery pack (17), a vehicle auxiliary controller (18) and a control valve (19) which are sequentially connected through pipelines; the second circulating pump (16) is provided with a first three-way valve (20) and a second three-way valve (21) on the pipeline connected with the battery pack (17); the combined heat exchanger (7) has three inlets and three outlets; the first three-way valve (20) is connected with a first inlet of the combined heat exchanger (7) through a pipeline; the second three-way valve (21) is connected with a first outlet of the combined heat exchanger (7) through a pipeline; a second inlet of the combined heat exchanger (7) is connected with a fourth interface of the heat exchanger (2) through a pipeline; a second outlet of the combined heat exchanger (7) is connected with the gas-liquid separator (4) through a pipeline; a third inlet of the combined heat exchanger (7) is connected with a third interface of the second water condenser (24) through a pipeline; a third outlet of the combined heat exchanger (7) is connected with the air conditioner host (3) through a pipeline. Further comprise a waste heat recovery cycle loop, the waste heat recovery cycle loop comprises the radiator (9), the first water condenser (6), the second circulating pump (16), the first three-way valve (20), the second three-way valve (21), the battery pack (17), the vehicle auxiliary controller (18), third circulating pump (26) and motor module are sequentially and circularly communicated by pipeline; The motor module comprises a front wheel motor (22) and a rear wheel motor (23).

2. The novel high-efficiency new energy vehicle thermal management system according to claim 1, characterized in that: The heat exchanger (2) has four interfaces, the first interface of the heat exchanger (2) is connected with the electric compressor (5) with air supplementing port through pipeline, the second interface of the heat exchanger (2) is connected with the main pipeline (12), the main pipeline (12) is connected with the third interface of the heat exchanger (2) through the sub-pipeline (13), the first electronic expansion valve (14) is arranged on the sub-pipeline (13); In the refrigeration cycle loop, the front end condenser (8) is connected with the main pipeline (12) through pipeline, the fourth interface of the heat exchanger (2) is connected with the air conditioner host (3) and the combined heat exchanger (7) through pipeline respectively; In the heat pump heating cycle loop, the front end condenser (8) is connected with the fourth interface of the heat exchanger (2) through pipeline, and the second water condenser (24) is connected with the main pipeline (12) through pipeline.

3. The novel high-efficiency new energy vehicle thermal management system according to claim 2, characterized in that: The second water condenser (24) has four interfaces, the first interface of the second water condenser (24) is connected with the electric compressor (5) with air supplementing port through pipeline, the second interface of the second water condenser (24) is connected with the main pipeline (12) through pipeline, the third interface of the second water condenser (24) is connected with the combined heat exchanger (7) through pipeline, and the fourth interface of the second water condenser (24) is connected with the first circulating pump (25) through pipeline.

4. The novel high-efficiency new energy vehicle thermal management system according to claim 3, characterized in that: The second water condenser (24) is connected with a high-pressure heater (15) in parallel, one end of the high-pressure heater (15) is connected with the liquid outlet end of the first circulating pump (25) through pipeline, and the other end of the high-pressure heater (15) is connected with the third interface of the second water condenser (24) through pipeline.

5. The novel and efficient new energy vehicle thermal management system of claim 4, wherein: The low-temperature circulation loop comprises the radiator (9), the first water condenser (6), the control valve (19), a third circulation pump (26) and a motor module which are sequentially and circularly communicated through pipelines. The outlet end of the radiator (9) is connected with the third interface of the first water condenser (6) through a pipeline and a third three-way valve (27). The control valve (19) has four interfaces. The first interface of the control valve (19) is connected with the fourth interface of the first water condenser (6) through a pipeline. The second interface of the control valve (19) is connected with the liquid inlet end of the third circulation pump (26) through a pipeline. The third interface of the control valve (19) is connected with the vehicle auxiliary controller (18) through a pipeline. The fourth interface of the control valve (19) is connected with the liquid inlet end of the second circulation pump (16) through a pipeline.

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