A pure electric vehicle thermal management system and a control method thereof

Abstract

The application discloses a pure electric vehicle thermal management system and a control method thereof. The thermal management system comprises a heat pump refrigerant cycle, a cabin heating cycle, an electric drive cooling liquid cycle and a battery cooling liquid cycle, and can realize multiple working modes including a heat pump heating cabin mode, a heat pump heating cabin mode using electric drive waste heat, an electric drive waste heat heating cabin mode, an electric drive waste heat heating battery mode, a cabin air conditioner refrigeration and electric drive battery radiator cooling mode, a cabin air conditioner refrigeration and battery cooling water machine refrigeration and an electric drive radiator cooling mode, and covers multiple thermal management requirements in all-weather conditions, and reduces energy consumption through reasonable waste heat utilization.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pure electric vehicle whole vehicle thermal management technology, and particularly relates to a pure electric vehicle thermal management system and a control method thereof. BACKGROUND

[0002] The heating, ventilation and air conditioning (HVAC) is the largest power consumption system in the pure electric vehicle accessories, and its efficiency has a huge impact on the vehicle range. In winter heating condition, most pure electric vehicles use PTC electric heater for heating, so the HVAC COP (heating efficiency) is not more than 1, which greatly reduces the range of the pure electric vehicle.

[0003] Although the heat pump air conditioning thermal management system can improve the refrigeration and heating efficiency, the heating efficiency is low and the defrosting is frequent in low temperature environment, which is a common problem in the industry. Since the power battery and the electric drive thermal management system are relatively isolated, the energy coupling and further integrated management among the systems cannot be coordinated, and the waste heat of the system cannot be fully utilized. If the waste heat of the electric drive system and the power battery can be introduced into the heat pump air conditioning system, it will be beneficial to greatly increase the overall heating efficiency of the thermal management system.

[0004] Therefore, it is necessary to develop an efficient whole vehicle thermal management system which can heat the cabin and recover waste heat at low temperature, fully cool the electric drive, battery and cabin at medium and high temperature, and meet various thermal management needs with low energy consumption in all-weather conditions. SUMMARY

[0005] Therefore, the present application provides a pure electric vehicle thermal management system and a control method thereof.

[0006] The present application achieves the above technical purpose by the following technical means.

[0007] A pure electric vehicle thermal management system, comprising:

[0008] Branch one, comprising a compressor, a first three-way valve, a water condenser, a first electronic expansion valve, an outdoor heat exchanger, a four-way valve, a second electronic expansion valve, a water chiller, a single-way valve and a gas-liquid separator which are sequentially connected, the four-way valve is connected with a third electronic expansion valve and an evaporator between the other two ports, the evaporator is also communicated with the single-way valve, and the first electronic expansion valve and the outdoor heat exchanger are communicated with one port of the first three-way valve through a pipeline;

[0009] Branch two, comprising a first water pump, a heater core, a second three-way valve, a heater and a water condenser which are sequentially connected;

[0010] The third branch includes a second water pump, an electric drive system, a third three-way valve, a fourth three-way valve, a third water pump, a battery system and a first switch valve connected in sequence, the third three-way valve also communicates with the first switch valve, the fourth three-way valve also communicates with the water chiller, the battery system and the first switch valve communicate with the water chiller through a pipeline, the second water pump and the first switch valve communicate with one port of the second three-way valve through a pipeline, and the pipeline nodes between the electric drive system and the third three-way valve and between the third three-way valve and the fourth three-way valve communicate through the radiator, and the radiator also communicates with the heater core and the second three-way valve through a pipeline.

[0011] In the above technical solution, the radiator is provided with a fan, and the evaporator is provided with a blower.

[0012] In the above technical solution, the compressor, the first three-way valve, the first electronic expansion valve, the four-way valve, the second electronic expansion valve, the third electronic expansion valve, the first water pump, the heater, the second three-way valve, the second water pump, the third three-way valve, the fourth three-way valve, the third water pump, the first switch valve, the second switch valve, the fan and the blower are all in communication connection with the output interface of the control module.

[0013] A control method of a pure electric vehicle thermal management system, characterized in that the control module controls the refrigerant flow rate by controlling the compressor, the control module controls the coolant flow rate by controlling the first water pump, the second water pump and the third water pump, the control module controls the air flow rate by controlling the fan and the blower, the control module controls the heating power of the heater, and the control module controls the communication, closing or specified flow state of the fluid by controlling the first electronic expansion valve, the second electronic expansion valve, the third electronic expansion valve, the four-way valve, the first switch valve, the second switch valve, the first three-way valve, the second three-way valve, the third three-way valve and the fourth three-way valve, so as to realize the heat pump heating cabin mode, the heat pump heating cabin and electric drive waste heat recovery mode, the electric drive waste heat heating cabin mode, the electric drive waste heat heating battery mode, the cabin air conditioner refrigeration and electric drive battery radiator cooling mode, the cabin air conditioner refrigeration and battery water chiller refrigeration, and the electric drive radiator cooling mode of the whole vehicle thermal management system.

[0014] Further, in the heat pump heating cabin mode, the control module controls the second port of the first three-way valve to be closed, the first port and the third port to be opened, controls the third port and the fourth port of the four-way valve to be opened, the first port and the second port to be closed, controls the first electronic expansion valve to be partially opened, controls the second electronic expansion valve and the third electronic expansion valve to be closed, controls the first port and the third port of the second three-way valve to be opened, the second port to be closed, controls the refrigerant flow rate of the compressor, controls the coolant flow rate of the first water pump, controls the air flow rate of the fan and the blower, and controls the heating power of the heater.

[0015] Further, in the heat pump heating cabin and electric drive waste heat recovery mode, the control module controls the second port of the first three-way valve to be closed, the first port and the third port to be opened, controls the first port and the fourth port of the four-way valve to be opened, the second port and the third port to be closed, controls the first electronic expansion valve to be fully opened, controls the second electronic expansion valve to be partially opened, controls the third electronic expansion valve to be closed, controls the first switch valve to be opened, controls the second switch valve to be closed, controls the second port of the second three-way valve to be closed, the first port and the third port to be opened, controls the second port of the third three-way valve to be closed, the first port and the third port to be opened, controls the first port of the fourth three-way valve to be closed, the second port and the third port to be opened, controls the refrigerant flow of the compressor, controls the cooling liquid flow of the first water pump and the second water pump, and controls the air flow of the fan and the blower.

[0016] Further, in the electric drive waste heat heating cabin mode, the control module controls the second port of the third three-way valve to be closed, the first port and the third port to be opened, controls the first switch valve to be closed, controls the second switch valve to be opened, controls the first port of the second three-way valve to be closed, the second port and the third port to be opened, controls the first electronic expansion valve, the second electronic expansion valve and the third electronic expansion valve to be closed, controls the refrigerant flow of the compressor, controls the cooling liquid flow of the first water pump and the second water pump, and controls the air flow of the fan and the blower.

[0017] Further, in the electric drive waste heat heating battery mode, the control module controls the second port of the third three-way valve to be closed, the first port and the third port to be opened, controls the second port of the fourth three-way valve to be closed, the first port and the third port to be opened, controls the first switch valve to be opened, controls the second switch valve, the first three-way valve, the second three-way valve, the four-way valve, the first electronic expansion valve, the second electronic expansion valve and the third electronic expansion valve to be closed, controls the refrigerant flow of the compressor, controls the cooling liquid flow of the second water pump, and controls the air flow of the fan.

[0018] Further, in the cabin air conditioner refrigeration and electric drive battery radiator cooling mode, the control module controls the first port of the first three-way valve to be closed, the second port and the third port to be opened, controls the first port and the third port of the four-way valve to be closed, the second port and the fourth port to be opened, controls the third electronic expansion valve to be partially opened, controls the first electronic expansion valve and the second electronic expansion valve to be closed, controls the second three-way valve and the third three-way valve to be closed, controls the second port of the fourth three-way valve to be closed, the first port and the third port to be opened, controls the first switch valve to be opened, the second switch valve to be closed, controls the refrigerant flow of the compressor, controls the cooling liquid flow of the second water pump and the third water pump, and controls the air flow of the fan and the blower.

[0019] Further, in the cooling mode of the cabin air conditioner refrigeration, the battery cold water machine refrigeration and the electric drive radiator cooling, the control module controls the second port of the first three-way valve to be closed, the first port and the third port to be opened, controls the third port of the four-way valve to be closed, the first port, the second port and the fourth port to be opened, controls the first electronic expansion valve to be closed, controls the second electronic expansion valve and the third electronic expansion valve to be partially opened, controls the second three-way valve to be closed, controls the third port of the third three-way valve to be closed, the first port and the second port to be opened, controls the third port of the fourth three-way valve to be closed, the first port and the second port of the fourth three-way valve to be opened, controls the first switch valve and the second switch valve to be closed, controls the refrigerant flow of the compressor, controls the cooling liquid flow of the second water pump and the third water pump, and controls the air flow of the fan and the blower.

[0020] The beneficial effects of the present application are:

[0021] (1) The pure electric vehicle thermal management system of the present application comprises a heat pump refrigerant cycle, a cabin heating cycle, an electric drive cooling liquid cycle and a battery cooling liquid cycle, the heat pump refrigerant cycle comprises a compressor, a water condenser, an outdoor heat exchanger, a cold water machine, a single-way valve, a gas-liquid separator, an evaporator, a first three-way valve, a first electronic expansion valve, a four-way valve, a second electronic expansion valve and a third electronic expansion valve, the cabin heating cycle comprises a first water pump, a heater, a heater core and a second three-way valve, the electric drive cooling liquid cycle comprises a second water pump, an electric drive system, a third three-way valve and a radiator, and the battery cooling liquid cycle comprises a fourth three-way valve, a third water pump and a battery system; the connection relationship of the components in the thermal management system of the present application is easy to implement, and the control logic is simple and clear;

[0022] (2) The heat management system of the application realizes multiple working modes including heat pump heating cabin mode, heat pump heating cabin mode using electric drive waste heat, electric drive waste heat heating cabin mode, electric drive waste heat heating battery mode, cabin air conditioner refrigeration and electric drive battery radiator cooling mode, cabin air conditioner refrigeration and battery water chiller refrigeration, and electric drive radiator cooling mode, covering various heat management needs in all-weather conditions, and reducing energy consumption through reasonable waste heat utilization; and the heat pump heating cabin mode utilizes the characteristics of heat pump refrigerant circulation energy consumption to provide heating function, thereby reducing the energy consumption of cabin heating; the heat pump heating cabin mode using electric drive waste heat reduces the energy consumption of outdoor heat exchanger defrosting and cabin heating, and ensures the efficient operation of the heat pump system through electric drive system waste heat recovery; the electric drive waste heat heating cabin mode ensures the driving safety of defrosting or demisting in the condition of windshield frosting or fogging, and reduces the energy consumption of cabin heating by using electric drive waste heat; the electric drive waste heat heating battery mode reduces the energy consumption of system heating battery by using electric drive waste heat; the cabin air conditioner refrigeration and electric drive battery radiator cooling mode ensures the thermal comfort of the cabin at medium temperature and the safety of electric drive and battery heat management, and achieves the effect of reducing heat management energy consumption; the cabin air conditioner refrigeration and electric drive radiator cooling and battery water chiller cooling mode ensures the comfort of the cabin and the safety of electric drive and battery heat management at high temperature, and the battery water chiller cooling solves the problem of insufficient heat dissipation of battery radiator cooling at high temperature. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The pure electric vehicle heat management system block diagram of the application;

[0024] Figure 2 The communication connection diagram of the control module and Figure 1 each actuator of the whole vehicle heat management system;

[0025] Figure 3 The schematic internal structure diagram of the control module shown in Figure 2 ;

[0026] Figure 4 The system diagram of the whole vehicle heat management system in the heat pump heating cabin mode shown in Figure 1 ;

[0027] Figure 5 The system diagram of the whole vehicle heat management system in the heat pump (electric drive waste heat recovery) heating cabin and electric drive waste heat recovery mode shown in Figure 1 ;

[0028] Figure 6 The system diagram of the whole vehicle heat management system in the electric drive waste heat heating cabin mode shown in Figure 1 ;

[0029] Figure 7 The system diagram of the whole vehicle heat management system in the electric drive waste heat heating battery mode shown inFigure 1 System diagram of the whole vehicle thermal management system in the electric drive waste heat heating battery mode;

[0030] Figure 8 is Figure 1 System diagram of the whole vehicle thermal management system in the cabin air conditioner refrigeration and electric drive battery radiator cooling mode;

[0031] Figure 9 is Figure 1 System diagram of the whole vehicle thermal management system in the cabin air conditioner refrigeration and electric drive radiator cooling and battery water chiller cooling mode;

[0032] In the figure: 100 - whole vehicle thermal management system, 101 - compressor, 102 - first three-way valve, 103 - water condenser, 104 - first electronic expansion valve, 105 - outdoor heat exchanger, 106 - four-way valve, 107 - second electronic expansion valve, 108 - water chiller, 109 - third electronic expansion valve, 110 - evaporator, 111 - single-way valve, 112 - gas-liquid separator, 201 - first water pump, 202 - heater, 203 - second three-way valve, 204 - heater core, 301 - second water pump, 302 - electric drive system, 303 - third three-way valve, 304 - fourth three-way valve, 305 - third water pump, 306 - battery system, 307 - first on-off valve, 308 - radiator, 309 - second on-off valve, 401 - fan, 402 - blower, 1011 - compressor exhaust port, 1012 - compressor suction port, 1021 - first three-way valve first port, 1022 - first three-way valve second port 1022, 1023 - first three-way valve third port, 1031 - water condenser refrigerant passage outlet, 1032 - water condenser coolant passage outlet, 1033 - water condenser coolant passage inlet, 1034 - water condenser refrigerant passage inlet, 1041 - first electronic expansion valve first port, 1042 - first electronic expansion valve second port, 1051 - outdoor heat exchanger outlet, 1052 - outdoor heat exchanger inlet, 1061 - four-way valve first port, 1062 - four-way valve second port, 1063 - four-way valve third port, 1064 - four-way valve fourth port, 1071 - second electronic expansion valve first port, 1072 - second electronic expansion valve second port, 1081 - water chiller refrigerant passage outlet, 1082 - water chiller coolant outlet, 1083 - water chiller coolant inlet, 1084 - water chiller refrigerant passage inlet, 1091 - third electronic expansion valve first port, 1092 - third electronic expansion valve second port, 1101 - evaporator refrigerant passage outlet, 1102 - evaporator refrigerant passage inlet, 1111 - single-way valve first port, 1112 - single-way valve second port, 1121 - gas-liquid separator outlet, 1122 - gas-liquid separator inlet, 2011 - first water pump outlet, 2012 - water condenser coolant passage inlet, 2021 - heater outlet, 2022 - heater inlet, 2031 - second three-way valve first port, 2032 - second three-way valve second port, 2033 - second three-way valve third port, 2041 - heater core outlet, 2042 - heater core inlet, 3011 - second water pump outlet, 3012 - second water pump inlet, 3021 - electric drive system outlet, 3022 - electric drive system inlet, 3031 - third three-way valve first port, 3032 - third three-way valve second port, 3033 - third three-way valve third port, 3041 - fourth three-way valve first port, 3042 - fourth three-way valve second port, 3043 - fourth three-way valve third port,3051 - third water pump outlet, 3052 - third water pump inlet, 3061 - battery system outlet, 3062 - battery system inlet, 3071 - first switch valve first port, 3072 - first switch valve second port, 3081 - radiator first port, 3082 - radiator second port, 3091 - second switch valve first port, 3092 - second switch valve second port, 8000 - control module, 8001 - bus, 8002 - input interface, 8003 - memory, 8004 - processor, 8005 - output interface, 8101 - output interface A, 8102 - output interface B, 8103 - output interface C, 8104 - output interface D, 8105 - output interface E, 8106 - output interface F, 8107 - output interface G, 8108 - output interface H, 8109 - output interface I, 8110 - output interface J, 8111 - output interface K, 8112 - output interface L, 8113 - output interface M, 8114 - output interface N, 8115 - output interface O, 8116 - output interface P, 8117 - output interface Q, 8200 - connection. DETAILED DESCRIPTION

[0033] For the purposes of this disclosure, like reference numerals in the description and in the drawings will be understood to refer to like parts, steps and features. In order to facilitate the understanding of this application, a thorough and complete description of the application will be provided below. The preferred embodiments of the application are shown in the drawings. However, the application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. For example, the three-way valves or four-way valves can be replaced by single-way valves or other reasonable valve types. Conversely, these embodiments are intended to be illustrative only and not restrictive of the scope of the application. Various specific embodiments of the application will be described below with reference to the drawings. It should be understood that the order of the steps presented herein is merely exemplary and not meant to be restrictive. For example, the term "first three-way valve" does not imply the existence of a "second three-way valve" and the term "second switch valve" does not imply the existence of a "first switch valve".

[0034] Figure 1The schematic diagram shows the components and their connection relationship in the whole vehicle thermal management system 100 of the present application. The whole vehicle thermal management system 100 comprises a compressor 101, a first three-way valve 102, a water condenser 103, a first electronic expansion valve 104, an outdoor heat exchanger 105, a four-way valve 106, a second electronic expansion valve 107, a chiller 108, a third electronic expansion valve 109, an evaporator 110, a single-way valve 111, a gas-liquid separator 112, a first water pump 201, a heater 202, a second three-way valve 203, a heater core 204, a second water pump 301, an electric drive system 302, a third three-way valve 303, a fourth three-way valve 304, a third water pump 305, a battery system 306, a first on-off valve 307, a radiator 308, a second on-off valve 309, a fan 401 and a blower 402, and the connection pipelines between the components are represented by lines. The compressor 101, the water condenser 103, the outdoor heat exchanger 105, the chiller 108, the single-way valve 111, the gas-liquid separator 112, the evaporator 110, the first three-way valve 102, the first electronic expansion valve 104, the four-way valve 106, the second electronic expansion valve 107 and the third electronic expansion valve 109 constitute a heat pump refrigerant cycle, the first water pump 201, the heater 202, the heater core 204 and the second three-way valve 203 constitute a cabin heating cycle, the second water pump 301, the electric drive system 302, the third three-way valve 303 and the radiator 308 constitute an electric drive cooling liquid cycle, and the fourth three-way valve 304, the third water pump 305 and the battery system 306 constitute a battery cooling liquid cycle.

[0035] The selection and role of each component of the whole vehicle thermal management system 100 are described as follows. Among them, the compressor 101 selects a scroll or other kind of electric compressor, which functions to compress the refrigerant vapor into superheated vapor and drive it to flow in the refrigerant circulation system. Among them, the first electronic expansion valve 104, the second electronic expansion valve 107 and the third electronic expansion valve 109 can be electromagnetic expansion valves or electric expansion valves, which achieve the temperature accuracy of superheat or subcooling by controlling the valve hole opening degree. Among them, the first water pump 201, the second water pump 301 and the third water pump 305 use electric water pumps, which drive the cooling liquid to flow in the cooling liquid circulation system. Among them, the water condenser 103 and the water chiller 108 are water-side heat exchangers, which provide heat exchange between the cooling liquid and the refrigerant. Among them, the heater 202 can be a positive temperature coefficient heater or other types of heaters. Among them, the first on-off valve 307, the second on-off valve 309 and the single-pass valve 111 can be electromagnetic single-pass valves or electric single-pass valves, which control the opening and closing of the valve. Among them, the air blower 402 can be different types of electric air blowers, which not only provide the required air flow for the heat exchange between the cabin cooling liquid and the air, but also provide the required air flow for the heat exchange between the cabin cooling liquid and the air. Among them, the fan 401 can be different types of fans, which provide the required air flow for the heat exchange between the outdoor heat exchanger 105 and the air, and the heat exchange between the radiator 308 and the air. Among them, the four-way valve 106, the first three-way valve 102, the second three-way valve 203, the third three-way valve 303 and the fourth three-way valve 304 can be electromagnetic valves, or can be set as other types of valves, as long as they meet the specific communication mode and can be reasonably replaced.

[0036] The connection pipelines between the components of the whole vehicle thermal management system 100 are described as follows. The first three-way valve first port 1021, the first three-way valve second port 1022 and the first three-way valve third port 1023 are respectively communicated with the water condenser refrigerant passage inlet 1034, the pipeline node A and the compressor exhaust port 1011; the first electronic expansion valve 104 is respectively communicated with the water condenser refrigerant passage outlet 1031 and the pipeline node A (i.e. the first electronic expansion valve first port 1041 is communicated with the pipeline node A, and the first electronic expansion valve second port 1042 is communicated with the water condenser refrigerant passage outlet 1031); the outdoor heat exchanger inlet 1052 is communicated with the pipeline node A, and the outdoor heat exchanger outlet 1051 is communicated with the four-way valve fourth port 1064; the second electronic expansion valve 107 is respectively communicated with the four-way valve first port 1061 and the water chiller refrigerant passage inlet 1084 (i.e. the second electronic expansion valve second port 1072 is communicated with the four-way valve first port 1061, and the second electronic expansion valve first port 1071 is communicated with the water chiller refrigerant passage inlet 1084); the third electronic expansion valve 109 is respectively communicated with the four-way valve second port 1062 and the evaporator refrigerant passage inlet 1102 (i.e. the third electronic expansion valve second port 1092 is communicated with the four-way valve second port 1062, and the third electronic expansion valve first port 1091 is communicated with the evaporator refrigerant passage inlet 1102); the pipeline node B is respectively communicated with the evaporator refrigerant passage outlet 1101, the four-way valve third port 1063 and the pipeline node C; the water chiller refrigerant passage outlet 1081 is communicated with the pipeline node C; the single-way valve 111 is respectively communicated with the pipeline node C and the gas-liquid separator inlet 1122 (i.e. the single-way valve second port 1112 is communicated with the pipeline node C, and the single-way valve first port 1111 is communicated with the gas-liquid separator inlet 1122); the compressor suction port 1012 is communicated with the gas-liquid separator outlet 1121; the first water pump water outlet 2011 is communicated with the water condenser coolant passage inlet 1033; the first water pump water inlet 2012 is communicated with the heater core outlet 2041; the water condenser coolant passage outlet 1032 is communicated with the heater inlet 2022; the pipeline node D is respectively communicated with the heater core inlet 2042, the second three-way valve first port 2031 and the second switch valve first port 3091; the heater outlet 2021 is communicated with the second three-way valve third port 2033; the pipeline node I is respectively communicated with the pipeline node H, the second three-way valve second port 2032 and the second water pump water inlet 3012; the second water pump water outlet 3011 is communicated with the electric drive system inlet 3022; the pipeline node E is respectively communicated with the radiator first port 3081, the third three-way valve third port 3033 and the electric drive system outlet 3021; the third three-way valve second port 3032 is communicated with the pipeline node H; the pipeline node F is respectively communicated with the third three-way valve first port 3031, the pipeline node J and the fourth three-way valve third port 3043;The pipeline node J is in communication with the pipeline node F, the radiator second port 3082 and the second switch valve second port 3092 respectively; the water inlet 1083 of the chiller cooling liquid is in communication with the fourth three-way valve second port 3042; the water inlet 3052 of the third water pump is in communication with the fourth three-way valve first port 3041; the water outlet 3051 of the third water pump is in communication with the battery system inlet 3062; the pipeline node G is in communication with the water outlet 1082 of the chiller cooling liquid, the battery system outlet 3061 and the first switch valve second port 3072 respectively; and the first switch valve first port 3071 is in communication with the pipeline node H.

[0037] Figure 2 is a control module Figure 1 The communication connection diagram of each actuator of the vehicle thermal management system in the control module is shown in FIG. 8. Figure 2As shown, the control module 8000 determines the working state of each actuator of the whole vehicle thermal management system 100. The control module 8000 outputs seventeen interfaces: output interface A 8101, output interface B 8102, output interface C 8103, output interface D 8104, output interface E 8105, output interface F 8106, output interface H 8108, output interface I 8109, output interface J 8110, output interface K 8111, output interface L 8112, output interface M 8113, output interface N 8114, output interface O 8115, output interface P 8116, output interface Q 8117 and output interface G 8107 of the output interface 8005, which are respectively in communication connection with the compressor 101, the first three-way valve 102, the first electronic expansion valve 104, the four-way valve 106, the second electronic expansion valve 107, the third electronic expansion valve 109, the first water pump 201, the heater 202, the second three-way valve 203, the second water pump 301, the third three-way valve 303, the fourth three-way valve 304, the third water pump 305, the first on-off valve 307, the second on-off valve 309, the fan 401 and the blower 402. The control module 8000 controls the refrigerant flow by controlling the compressor 101; the control module 8000 controls the coolant flow by controlling the first water pump 201, the second water pump 301 and the third water pump 305; the control module 8000 controls the air flow by controlling the fan 401 and the blower 402; the control module 8000 controls the heating power of the heater 202; the control module controls the communication, closing or specified flow state of the fluid by controlling the first electronic expansion valve 104, the second electronic expansion valve 107, the third electronic expansion valve 109, the four-way valve 106, the first on-off valve 307, the second on-off valve 309, the first three-way valve 102, the second three-way valve 203, the third three-way valve 303 and the fourth three-way valve 304, wherein the opening degree of the valve hole when the first electronic expansion valve 104, the second electronic expansion valve 107 and the third electronic expansion valve 109 are partially opened is related to the supercooling or superheating control of the outdoor heat exchanger 105, the water chiller 108 and the evaporator 110; the above control process is the prior art. The control logic of the whole vehicle thermal management system of the present application is simple and clear, and easy to implement.

[0038] Figure 3 is Figure 2 The control module is shown in the schematic internal structure diagram. As Figure 3As shown, the control module 8000 of the whole vehicle thermal management system 100 comprises a bus 8001, an input interface 8002, a memory 8003, a processor 8004 and an output interface 8005, the input interface 8002, the memory 8003, the processor 8004 and the output interface 8005 are connected with the bus 8001 for signal transmission. Specifically, the memory 8003 is used for storing programs, instructions and data, while the processor 8004 reads the programs, instructions and data from the memory 8003 and can write data to the memory 8003. By executing the programs and instructions read by the memory 8003, the processor 8004 realizes signal exchange through the input interface 8002 and the output interface 8005. As shown in the figure, Figure 3 As shown, the input interface 8002 of the control module 8000 receives the operation request and other operation parameters of the whole vehicle thermal management system 100 through the connection 8200. By executing the programs and instructions in the processor 8003, the processor 8004 controls the operation of the whole vehicle thermal management system 100. Specifically, the control module 8000 can accept the operation request of the whole vehicle thermal management system 100 or the signal of other components through the input interface 8002, and send control signals to each controlled component through the output interface 8005, so that the whole vehicle thermal management system 100 can run in the specified working mode and can switch between different modes.

[0039] Figures 4-9 is Figure 1 The system diagram of the whole vehicle thermal management system 100 is shown to show the fluid flow state of the whole vehicle thermal management system 100 in different working modes, wherein the hollow dotted arrow represents the flow direction and flow path of the refrigerant, the thick solid arrow represents the flow direction and flow path of the cooling liquid, and the other solid lines represent no fluid flow. The details of Figures 4-9 each working mode are described below.

[0040] Figure 4 is Figure 1The whole vehicle thermal management system 100 is shown in the system diagram of the heat pump heating cabin mode. In a low temperature environment, the whole vehicle thermal management system 100 can absorb heat from the environment and transfer to the cabin through the heat pump refrigerant circulation after receiving the cabin heating instruction (or the control module 8000 automatically generates the cabin heating instruction). The control module 8000 controls the first three-way valve second port 1022 to be closed, the first three-way valve first port 1021 and the first three-way valve third port 1023 to be opened, controls the four-way valve third port 1063 and the four-way valve fourth port 1064 to be opened, the four-way valve first port 1061 and the four-way valve second port 1062 to be closed, controls the first electronic expansion valve 104 to be partially opened, controls the second electronic expansion valve 107 and the third electronic expansion valve 109 to be closed, controls the second three-way valve first port 2031 and the second three-way valve third port 2033 to be opened, the second three-way valve second port 2032 to be closed, controls the refrigerant flow of the compressor 101, controls the cooling liquid flow of the first water pump 210, controls the air flow of the fan 401 and the air blower 402, and controls the heating power of the heater 202, so as to realize the working mode of the heat pump heating cabin. As shown in Figure 4 As shown, the high temperature and high pressure refrigerant flowing out of the compressor exhaust port 1011 passes through the first three-way valve third port 1023 and the first three-way valve first port 1021, and then passes through the refrigerant channel of the water condenser 103, and is condensed from gas to liquid under the cooling effect of the cooling liquid. The high temperature and high pressure refrigerant will be decompressed and increased in volume by the partially opened first electronic expansion valve 104, forming a low temperature and low pressure liquid mist mixture into the outdoor heat exchanger 105, at this time, the outdoor heat exchanger 105 functions as an evaporator, which will absorb a large amount of heat in the ambient air, so that the refrigerant becomes gaseous, and then passes through the four-way valve fourth port 1064 and the four-way valve third port 1063 to reach the pipeline node B, and then successively passes through the pipeline node C, the single-way valve 111, and then flows into the gas-liquid separator inlet 1122. The gas-liquid separator 112 separates the liquid refrigerant and the gaseous refrigerant. The compressor suction port 1012 inhales the gaseous refrigerant from the gas-liquid separator outlet 1121, and starts the next refrigerant circulation work. On the other hand, the low temperature cooling liquid pumped out of the first water pump outlet 2011 passes through the cooling liquid channel of the water condenser 103, and absorbs the heat released by the refrigerant to generate high temperature cooling liquid, and then successively passes through the heater 202, the second three-way valve third port 2033 and the second three-way valve first port 2031, the pipeline node D, and then flows into the heater core second port 2042. The high temperature cooling liquid releases heat to the air blown by the air blower 402 when passing through the heater core 204 to heat the cabin, and becomes low temperature cooling liquid at the outlet 2041 of the heater core 204, which is inhaled by the first water pump inlet 2012, forming a cabin heating cooling liquid circulation.

[0041] Figure 5 is Figure 1The diagram shows the vehicle thermal management system 100 in both heat pump (electric drive waste heat recovery) cabin heating and electric drive waste heat recovery modes. When the vehicle thermal management system 100 detects frost buildup on the outdoor heat exchanger that is affecting the heat pump efficiency, it enters defrosting mode. Furthermore, if the coolant temperature at the electric drive system outlet 3021 is high, waste heat from the electric drive system can be used to defrost the outdoor heat exchanger while simultaneously heating the cabin. Control module 8000 controls the second port 1022 of the first three-way valve to close, the first port 1021 and the third port 1023 of the first three-way valve to open, controls the first port 1061 and the fourth port 1064 of the four-way valve to open, and the second port 1062 and the third port 1063 of the four-way valve to close, controls the first electronic expansion valve 104 to fully open, controls the second electronic expansion valve 107 to partially open, controls the third electronic expansion valve 109 to close, controls the first switching valve 307 to open, controls the second switching valve 309 to close, and controls the second port 2032 of the second three-way valve to close. The first port 2031 and the third port 2033 of the second three-way valve are opened, controlling the second port 3032 of the third three-way valve to close, and the first port 3031 and the third port 3033 of the third three-way valve to open, controlling the first port 3041 of the fourth three-way valve to close, and the second port 3042 and the third port 3043 of the fourth three-way valve to open, thereby controlling the refrigerant flow of the compressor 101, the coolant flow of the first water pump 201 and the second water pump 301, and the airflow of the fan 401 and the blower 402, so as to achieve the purpose of the heat pump using the waste heat from the electric drive to heat the cabin. Figure 5As shown, the high-temperature and high-pressure refrigerant flowing out of the compressor exhaust port 1011 passes through the first three-way valve third port 1023 and the first three-way valve first port 1021 into the refrigerant channel of the water condenser 103, and under the cooling effect of the cooling liquid, part of the refrigerant is condensed from gas to liquid, and enters the outdoor heat exchanger 105 in a high-temperature and high-pressure state through the fully open first electronic expansion valve 104 to dissipate heat to the environment, thereby defrosting the fins and coils of the outdoor heat exchanger 105. In this mode of operation, the outdoor heat exchanger 105 functions as a condenser. The refrigerant flows through the four-way valve fourth port 1064 and the four-way valve first port 1061, and when passing through the partially open second electronic expansion valve 107, the pressure is reduced and the volume is increased, forming a low-temperature and low-pressure liquid mist mixture that enters the water chiller 108 to absorb heat from the cooling liquid. The refrigerant flows from the water chiller refrigerant channel outlet 1081 through the pipe node C and the one-way valve 111, and then passes through the gas-liquid separator 112 to separate the liquid refrigerant and the gaseous refrigerant. The compressor suction port 1012 inhales gaseous refrigerant from the gas-liquid separator outlet 1121, starting the next refrigerant cycle. On the other hand, the cooling liquid flows from the electric drive system outlet 3021 through the pipe node E, the third three-way valve third port 3033 and the third three-way valve first port 3031, the pipe node F, the fourth three-way valve third port 3043 and the fourth three-way valve second port 3042, and then enters the water chiller cooling liquid inlet 1083. The heat released by the high-temperature cooling liquid is absorbed by the refrigerant, and then returns to the electric drive system inlet 3022 through the pipe node G, the first switch valve 307, the pipe node E, the pipe node I, and the second water pump 301, forming a cooling liquid circulation for electric drive waste heat recovery.

[0042] Figure 6 is Figure 1 The whole vehicle thermal management system 100 in the electric drive waste heat heating cabin mode is shown in the system diagram. When the whole vehicle thermal management system 100 identifies that the heat pump efficiency is low and the cooling liquid temperature at the electric drive system outlet 3021 is high, the electric drive waste heat can be directly used to heat the cabin. The control module 8000 controls the third three-way valve second port 3032 to be closed, the third three-way valve first port 3031 and the third three-way valve third port 3033 to be open, controls the first switch valve 307 to be closed, controls the second switch valve 309 to be open, controls the second three-way valve first port 2031 to be closed, the second three-way valve second port 2032 and the second three-way valve third port 2033 to be open, controls the first electronic expansion valve 104, the second electronic expansion valve 107 and the third electronic expansion valve 109 to be closed, controls the refrigerant flow of the compressor 101, controls the cooling liquid flow of the first water pump 201 and the second water pump 301, and controls the air flow of the fan 401 and the blower 402, to form an electric drive waste heat heating cabin mode. As shown in Figure 6As shown, the refrigerant cycle is not working. The high-temperature coolant flows from the electric drive system outlet 3021 through pipe node E, the third port 3033 and the first port 3031 of the third three-way valve, pipe node F, pipe node J, the second switching valve 309, pipe node D, heater core 204, the first water pump 201, the water condenser 103, the heater 202, the third port 2033 and the second port 2032 of the second three-way valve, pipe node I, and the second water pump 201 before flowing back to the electric drive system inlet 3022, forming a coolant cycle for heating the cabin with waste heat from the electric drive.

[0043] Figure 7 yes Figure 1 The diagram shows the vehicle thermal management system 100 in a mode that utilizes waste heat from the electric drive to heat the battery. When the coolant temperature at the outlet 3021 of the electric drive system is too high, the battery can be heated using waste heat recovery from the electric drive. The control module 8000 controls the second port 3032 of the third three-way valve to close, and the first ports 3031 and 3033 of the third three-way valve to open; controls the second port 3042 of the fourth three-way valve to close, and the first ports 3041 and 3043 of the fourth three-way valve to open; controls the first switching valve 307 to open; and controls the second switching valve 309, the first three-way valve 102, the second three-way valve 203, the four-way valve 106, the first electronic expansion valve 104, the second electronic expansion valve 107, and the third electronic expansion valve 109 to close. It also controls the refrigerant flow rate of the compressor 101, the coolant flow rate of the second water pump 301, and the airflow rate of the fan 401 to achieve the purpose of heating the battery using waste heat from the electric drive. Figure 7 As shown, the high-temperature coolant flows from the electric drive system outlet 3021 through pipe node E, the third port 3033 and the first port 3031 of the third three-way valve, pipe node F, the third port 3043 and the first port 3041 of the fourth three-way valve, and the third water pump 305 before flowing into the battery system inlet 3062, thus heating the battery. After heating the battery, the coolant flows out of the battery system outlet 3061 through pipe node G, the first switching valve 307, pipe node H, pipe node I, and the second water pump 301 before flowing into the electric drive system inlet 3022, forming a coolant circulation system for heating the battery using waste heat from the electric drive.

[0044] Figure 8 yes Figure 1The system diagram of the whole vehicle thermal management system 100 in the cabin air conditioner refrigeration and electric drive battery radiator cooling mode is shown. The whole vehicle thermal management system 100 receives the cabin air conditioner refrigeration instruction (or the control module 8000 automatically generates the cabin refrigeration instruction) to circulate the refrigerant to the cabin refrigeration. When the environmental temperature is suitable and the battery heat production is not large, the battery can be cooled with the radiator at the same time as the electric drive, thereby reducing the compressor load and reducing the compressor energy consumption. The control module 8000 controls the first three-way valve first port 1021 to be closed, the first three-way valve second port 1022 and the first three-way valve third port 1023 to be opened, controls the four-way valve first port 1061 and the four-way valve third port 1063 to be closed, the four-way valve second port 1062 and the four-way valve fourth port 1064 to be opened, controls the third electronic expansion valve 109 to be partially opened, controls the first electronic expansion valve 104 and the second electronic expansion valve 107 to be closed, controls the second three-way valve 203 and the third three-way valve 303 to be closed, controls the fourth three-way valve second port 3042 to be closed, the fourth three-way valve first port 3041 and the fourth three-way valve third port 3043 to be opened, controls the first switch valve 307 to be opened, the second switch valve 309 to be closed, controls the compressor 101 refrigerant flow, controls the second water pump 201 and the third water pump 301 cooling liquid flow, controls the fan 401 and the air blower 402 air flow, to achieve the purpose of cabin refrigeration, electric drive and battery cooling. As shown in FIG. 1B, the system diagram of the whole vehicle thermal management system 100 in the cabin air conditioner refrigeration and electric drive battery radiator cooling mode is shown. Figure 8As shown, the high-temperature and high-pressure refrigerant flowing out of the compressor outlet 1011 passes through the first three-way valve third port 1023 and the first three-way valve second port 1022, the pipe node A, and then flows into the outdoor heat exchanger 105 refrigerant passage. Under the cooling effect of the cooling liquid, part of the refrigerant is condensed from gas to liquid. After passing through the fourth four-way valve port 1064 and the second four-way valve port 1062, the refrigerant is decompressed and its volume is increased by the third electronic expansion valve 109, which is partially opened, to form a low-temperature and low-pressure liquid mist mixture that enters the evaporator 110. The liquid mist mixture absorbs the heat of the air blown out by the air blower 402 and reduces the humidity through air refrigeration. The refrigerant flows from the evaporator outlet 1101, sequentially passes through the pipe node B, the pipe node C, and the single-way valve 111, and then separates the liquid refrigerant and the gaseous refrigerant through the gas-liquid separator 112. The compressor inlet 1012 sucks in the gaseous refrigerant from the gas-liquid separator outlet 1121, starting the next refrigerant cycle. On the other hand, the third three-way valve 303 is closed, and the cooling liquid pumped out from the battery system outlet 3061 flows through the pipe node G, the first switch valve 307, the pipe node H, the pipe node I, and the first water pump 301, and then flows through the electric drive system 302. The high-temperature cooling liquid flows to the radiator 308, and under the wind speed control of the fan 401, the high-temperature cooling liquid at the radiator first port 3081 exchanges heat with the air and is cooled, forming low-temperature cooling liquid at the radiator second port 3082. The low-temperature cooling liquid sequentially passes through the pipe node J, the pipe node F, the fourth three-way valve third port 3043, and the fourth three-way valve first port 3041, and then flows into the battery system inlet 3062, thereby forming a cooling liquid circulation for cooling the electric drive and the battery radiator.

[0045] Figure 9 is Figure 1The whole vehicle thermal management system 100 is shown in the system diagram under the air conditioning refrigeration and electric drive radiator cooling and battery chiller cooling mode of the cabin. When the air temperature is high, the battery high-temperature cooling liquid cannot exchange heat with the environment air through the radiator, so it needs to be cooled through the chiller. The control module 8000 controls the first three-way valve second port 1022 to be closed, the first three-way valve first port 1021 and the first three-way valve third port 1023 to be opened, controls the four-way valve third port 1063 to be closed, the four-way valve first port 1061, the four-way valve second port 1062 and the four-way valve fourth port 1064 to be opened, controls the first electronic expansion valve 104 to be closed, controls the second electronic expansion valve 107 and the third electronic expansion valve 109 to be partially opened, controls the second three-way valve 303 to be closed, controls the third three-way valve third port 3033 to be closed, the third three-way valve first port 3031 and the third three-way valve second port 3032 to be opened, controls the fourth three-way valve third port 3043 to be closed, the fourth three-way valve first port 3041 and the fourth three-way valve second port 3042 to be opened, controls the first on-off valve 307 and the second on-off valve 309 to be closed, controls the compressor 101 refrigerant flow, controls the second water pump 301 and the third water pump 305 cooling liquid flow, controls the fan 401 and the air blower 402 air flow, to achieve the purpose of high-temperature environment heat pump air conditioning cooling cabin, electric drive radiator cooling and battery chiller cooling. As shown in Figure 9 The difference between the refrigerant cycle shown in Figure 8 , the four-way valve first port 1061, the four-way valve second port 1062 and the four-way valve fourth port 1064 are opened, and the refrigerant not only enters the partially opened third electronic expansion valve 109, but also enters the partially opened second electronic expansion valve 107, so that the low-temperature and low-pressure state is reached in the refrigerant passage of the chiller 108 and the evaporator 110 at the same time, achieving the effect of cooling the battery system and the cabin refrigeration. The refrigerant from the evaporator outlet 1101 flows into the gas-liquid separator 112 through the pipeline node B, the pipeline node C and the single-way valve 111. The chiller refrigerant outlet 1081 flows into the gas-liquid separator 112 through the pipeline node C and the single-way valve 111. The gas-liquid separator 112 separates the liquid refrigerant and the gaseous refrigerant. The compressor suction port 1012 sucks in the gaseous refrigerant from the gas-liquid separator outlet 1121, starting the work of the next refrigerant cycle. On the other hand, the high-temperature cooling liquid from the battery system 306 outlet flows into the chiller cooling liquid passage 1082 through the pipeline node G, and the high-temperature cooling liquid exchanges heat with the refrigerant in the chiller 108 and forms low-temperature cooling liquid at the chiller cooling liquid passage outlet 1083, which flows back to the battery system inlet 3062 through the fourth four-way valve second port 3042 and the fourth four-way valve first port 3041 in turn and the third water pump 305, forming the battery system chiller cooling cycle. The electric drive radiator cooling works in the same mode as shown in Figure 8 , so here is not repeated.

[0046] The above embodiments are preferred embodiments of the present application, but the present application is not limited to the above embodiments, and any obvious improvements, replacements or modifications made by those skilled in the art without departing from the spirit of the present application shall fall within the scope of protection of the present application.

Claims

1. A control method of a pure electric vehicle thermal management system, characterized by, The pure electric vehicle thermal management system comprises: Branch I, comprising a compressor (101), a first three-way valve (102), a water condenser (103), a first electronic expansion valve (104), an outdoor heat exchanger (105), a four-way valve (106), a second electronic expansion valve (107), a water chiller (108), a single-way valve (111), and a gas-liquid separator (112) connected in sequence, the four-way valve (106) being additionally connected with a third electronic expansion valve (109) and an evaporator (110) between the other two ports of the four-way valve (106), the evaporator (110) further being communicated with the single-way valve (111), and the first electronic expansion valve (104) and the outdoor heat exchanger (105) being communicated with one port of the first three-way valve (102) through a pipeline; Branch II, comprising a first water pump (201), a heater core (204), a second three-way valve (203), a heater (202), and the water condenser (103) connected in sequence; Branch III, comprising a second water pump (301), an electric drive system (302), a third three-way valve (303), a fourth three-way valve (304), a third water pump (305), a battery system (306), and a first switch valve (307) connected in sequence, the third three-way valve (303) further being communicated with the first switch valve (307), the fourth three-way valve (304) further being communicated with the water chiller (108), the battery system (306) and the first switch valve (307) being communicated with the water chiller (108) through a pipeline, the second water pump (301) and the first switch valve (307) being communicated with one port of the second three-way valve (203) through a pipeline, and a pipeline node between the electric drive system (302) and the third three-way valve (303) and a pipeline node between the third three-way valve (303) and the fourth three-way valve (304) being communicated with a radiator (308), the radiator (308) further being communicated with the heater core (204) and the second three-way valve (203) through a pipeline; A fan (401) is arranged at the radiator (308), and a blower (402) is arranged at the evaporator (110). The control module (8000) controls the refrigerant flow by controlling the compressor (101), controls the coolant flow by controlling the first water pump (201), the second water pump (301) and the third water pump (305), controls the air flow by controlling the fan (401) and the blower (402), controls the heating power of the heater (202), controls the communication, closing or specified flow state of the fluid by controlling the first electronic expansion valve (104), the second electronic expansion valve (107), the third electronic expansion valve (109), the four-way valve (106), the first on-off valve (307), the second on-off valve (309), the first three-way valve (102), the second three-way valve (203), the third three-way valve (303) and the fourth three-way valve (304), to realize the heat pump heating cabin mode, the heat pump heating cabin and electric drive waste heat recovery mode, the electric drive waste heat heating cabin mode, the electric drive waste heat heating battery mode, the cabin air conditioner refrigeration and electric drive battery radiator cooling mode, the cabin air conditioner refrigeration and battery water chiller refrigeration, and the electric drive radiator cooling mode of the whole vehicle thermal management system.

2. The control method according to claim 1, characterized by, In the heat pump heating cabin mode, the control module (8000) controls the second port of the first three-way valve (102) to be closed, the first port and the third port to be opened, controls the third port and the fourth port of the four-way valve (106) to be opened, the first port and the second port to be closed, controls the first electronic expansion valve (104) to be partially opened, controls the second electronic expansion valve (107) and the third electronic expansion valve (109) to be closed, controls the first port and the third port of the second three-way valve (203) to be opened, the second port to be closed, controls the refrigerant flow of the compressor (101), controls the coolant flow of the first water pump (210), controls the air flow of the fan (401) and the blower (402), controls the heating power of the heater (202).

3. The control method according to claim 1, characterized by, In the heat pump heating cabin mode, the control module (8000) controls the second port of the first three-way valve (102) to be closed, the first port and the third port to be opened, controls the first port and the fourth port of the four-way valve (106) to be opened, the second port and the third port to be closed, controls the first electronic expansion valve (104) to be completely opened, controls the second electronic expansion valve (107) to be partially opened, controls the third electronic expansion valve (109) to be closed, controls the first on-off valve (307) to be opened, controls the second on-off valve (309) to be closed, controls the second port of the second three-way valve (203) to be closed, the first port and the third port to be opened, controls the second port of the third three-way valve (303) to be closed, the first port and the third port to be opened, controls the first port of the fourth three-way valve (304) to be closed, the second port and the third port to be opened, controls the refrigerant flow of the compressor (101), controls the coolant flow of the first water pump (201) and the second water pump (301), controls the air flow of the fan (401) and the blower (402).

4. The control method according to claim 1, characterized by, When the electric drive waste heat heats the cabin mode, the control module (8000) controls the second port of the third three-way valve (303) to be closed, the first port and the third port to be opened, controls the first switch valve (307) to be closed, controls the second switch valve (309) to be opened, controls the first port of the second three-way valve (203) to be closed, the second port and the third port to be opened, controls the first electronic expansion valve (104), the second electronic expansion valve (107) and the third electronic expansion valve (109) to be closed, controls the refrigerant flow of the compressor (101), controls the cooling liquid flow of the first water pump (201) and the second water pump (301), controls the air flow of the fan (401) and the air blower (402).

5. The control method according to claim 1, characterized by, When the electric drive waste heat heats the battery mode, the control module (8000) controls the second port of the third three-way valve (303) to be closed, the first port and the third port to be opened, controls the second port of the fourth three-way valve (304) to be closed, the first port and the third port to be opened, controls the first switch valve (307) to be opened, controls the second switch valve (309), the first three-way valve (102), the second three-way valve (203), the four-way valve (106), the first electronic expansion valve (104), the second electronic expansion valve (107) and the third electronic expansion valve (109) to be closed, controls the refrigerant flow of the compressor (101), controls the cooling liquid flow of the second water pump (301), controls the air flow of the fan (401).

6. The control method according to claim 1, characterized by When the cabin air conditioner refrigeration and the electric drive battery radiator cooling mode, the control module (8000) controls the first port of the first three-way valve (102) to be closed, the second port and the third port to be opened, controls the first port and the third port of the four-way valve (106) to be closed, the second port and the fourth port to be opened, controls the third electronic expansion valve (109) to be partially opened, controls the first electronic expansion valve (104) and the second electronic expansion valve (107) to be closed, controls the second three-way valve (203) and the third three-way valve (303) to be closed, controls the second port of the fourth three-way valve (304) to be closed, the first port and the third port to be opened, controls the first switch valve (307) to be opened, the second switch valve (309) to be closed, controls the refrigerant flow of the compressor (101), controls the cooling liquid flow of the second water pump (201) and the third water pump (301), controls the air flow of the fan (401) and the air blower (402).

7. The control method according to claim 1, characterized by, When the cabin air conditioning refrigeration and battery cold water chiller refrigeration and electric drive radiator cooling mode, the control module (8000) controls the second port of the first three-way valve (102) to be closed, the first port and the third port to be opened, controls the third port of the four-way valve (106) to be closed, the first port, the second port and the fourth port to be opened, controls the first electronic expansion valve (104) to be closed, controls the second electronic expansion valve (107) and the third electronic expansion valve (109) to be partially opened, controls the second three-way valve (303) to be closed, controls the third port of the third three-way valve (303) to be closed, the first port and the second port to be opened, controls the third port of the fourth three-way valve (303) to be closed, the first port and the second port of the fourth three-way valve (304) to be opened, controls the first switch valve (307) and the second switch valve (309) to be closed, controls the refrigerant flow of the compressor (101), controls the cooling liquid flow of the second water pump (301) and the third water pump (305), controls the air flow of the fan (401) and the air blower (402).

8. The control method according to claim 1, characterized by, The compressor (101), the first three-way valve (102), the first electronic expansion valve (104), the four-way valve (106), the second electronic expansion valve (107), the third electronic expansion valve (109), the first water pump (201), the heater (202), the second three-way valve (203), the second water pump (301), the third three-way valve (303), the fourth three-way valve (304), the third water pump (305), the first switch valve (307), the second switch valve (309), the fan (401) and the air blower (402) are all in communication connection with the output interface of the control module.

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