Thermal management system and method for extended-range hybrid power light truck

Abstract

The invention provides a thermal management system and method for an extended-range hybrid power light truck. The system comprises a control module, a compressor, a water condenser, a first electronic expansion valve, a first outdoor heat exchanger, a fan, a second electronic expansion valve, a third electronic expansion valve, a second heat exchanger, an evaporator, an air blower, a gas-liquid separator, a first water pump, a first three-way valve, an electric drive system, a heater, a power battery, a first heat exchanger, a second water pump and a second outdoor heat exchanger. A heater core, a second three-way valve, a third water pump, an engine, a first four-way valve, a fourth water pump, a third three-way valve and a third outdoor heat exchanger; multiple working modes including a low-temperature hybrid preheating mode, a low-temperature hybrid heat pump heating and waste heat recovery mode, a low-temperature pure electric heat pump heating mode, a high-temperature hybrid heat dissipation cooling mode and a high-temperature pure electric system cooling mode are achieved through control over multiple parts by the control module, and energy consumption is reduced while different heat management requirements are met.

Description

Technical Field

[0001] The present application relates to the field of hybrid control technology, and in particular to a thermal management system and method for an extended-range hybrid light truck. Background Art

[0002] At present, the rapid development of extended-range hybrid vehicles has attracted much attention for their vehicle thermal management technology. As a key component of hybrid vehicles, the thermal management system can not only ensure that important components such as motors, batteries and engines operate within a suitable temperature range to ensure safety and service life, but also meet the heating and cooling needs of the passenger compartment and improve riding comfort. In addition, the thermal management system must minimize energy consumption and achieve efficient energy utilization to extend driving range and enhance energy efficiency. The current thermal management system is relatively simple in structure and control method, resulting in high energy consumption during the control process. Summary of the invention

[0003] The purpose of the present application is to provide a thermal management system and method for an extended-range hybrid light truck. By controlling the process of various components by a control module, multiple operating modes can be realized, including a low-temperature hybrid preheating mode, a low-temperature hybrid heat pump heating and waste heat recovery mode, a low-temperature pure electric heat pump heating mode, a high-temperature hybrid heat dissipation mode, and a high-temperature pure electric system cooling mode, thereby meeting different thermal management requirements while reducing energy consumption.

[0004] In a first aspect, the present application provides a thermal management system for a range-extended hybrid light truck, the system comprising: a control module, a compressor, a water condenser, a first electronic expansion valve, a first outdoor heat exchanger, a fan, a second electronic expansion valve, a third electronic expansion valve, a second heat exchanger, an evaporator, a blower, a gas-liquid separator, a first water pump, a first three-way valve, an electric drive system, a heater, a power battery, a first heat exchanger, a second water pump, a second outdoor heat exchanger, a heater core, a second three-way valve, a third water pump, an engine, a first four-way valve, a fourth water pump, The third three-way valve and the third outdoor heat exchanger; wherein, the compressor, the water condenser, the first electronic expansion valve, the first outdoor heat exchanger, the second electronic expansion valve, the evaporator, the node B, the gas-liquid separator, and the compressor are connected in sequence to form a first closed loop; the water condenser, the first water pump, the first three-way valve, the heater, the first heat exchanger, the second water pump, the heater core, the node C, and the water condenser are connected in sequence to form a second closed loop; the first water pump, the electric drive system, the power battery, the second three-way valve, the second outdoor heat exchanger, the node G, and the node C are connected in sequence to form a second closed loop. The second outdoor heat exchanger is also connected to node G; the first heat exchanger is also connected to the fourth water pump and the first four-way valve respectively; the first four-way valve is respectively connected to the second heat exchanger, node E, and the engine; the second heat exchanger is respectively connected to node B, the third electronic expansion valve, and node D; node D is respectively connected to node E and the fourth water pump; the third electronic expansion valve is also connected to node A; node E, the third three-way valve, the third outdoor heat exchanger, node F, the third water pump, and the engine are connected in sequence; node F is also connected to the third three-way valve; the control module is respectively connected to the compressor, the first electronic expansion valve, the second electronic expansion valve, the third electronic expansion valve, the first water pump, the second water pump, the third water pump, the fourth water pump, the heater, the first three-way valve, the second three-way valve, the third three-way valve, the first four-way valve, the blower and the fan to achieve communication connection; through the control of the control module, a variety of working modes are realized, including low-temperature hybrid preheating mode, low-temperature hybrid heat pump heating and waste heat recovery mode, low-temperature pure electric heat pump heating mode, high-temperature hybrid heat dissipation cooling mode and high-temperature pure electric system cooling and heat dissipation mode, so as to meet different thermal management requirements.

[0005] Furthermore, the above-mentioned compressor suction port is connected to the gas-liquid separator outlet; the second port of the water condenser is connected to the compressor exhaust port; the first port of the water condenser is connected to the second port of the first electronic expansion valve; the first port of the first electronic expansion valve is connected to the inlet of the first outdoor heat exchanger; the pipeline node A is connected to the first outdoor heat exchanger outlet, the second port of the second electronic expansion valve and the second port of the third electronic expansion valve respectively; the first port of the second electronic expansion valve is connected to the second port of the evaporator; the pipeline node B is connected to the first port of the evaporator, the first port of the second heat exchanger and the gas-liquid separator inlet respectively; the first port of the third electronic expansion valve is connected to the first port of the second heat exchanger; the water outlet of the first water pump is connected to the third port of the first three-way valve; the second port of the first three-way valve is connected to the second port of the heater; the second port of the first heat exchanger is connected to the first port of the heater; the water inlet of the second water pump is connected to the first port of the first heat exchanger; the second port of the heater core is connected to the water outlet of the second water pump; the pipeline node C is connected to the first port of the heater core, the node G and the fourth port of the water condenser respectively; the water condenser The third port of the pump is communicated with the water inlet of the first water pump; the second port of the electric drive system is communicated with the first port of the first three-way valve; the second port of the power battery is communicated with the first port of the electric drive system; the second port and the first port of the second three-way valve are respectively communicated with the first port of the power battery and the second port of the second outdoor heat exchanger; the pipeline node G is respectively communicated with the pipeline node C, the third port of the second three-way valve and the first port of the second outdoor heat exchanger; the water outlet of the third water pump is communicated with the second port of the engine; the first four-way valve is respectively communicated with the first port of the engine, the fourth port of the first heat exchanger, the third port of the second heat exchanger and the pipeline node E; the water inlet of the fourth water pump is communicated with the third port of the first heat exchanger; the node D is respectively communicated with the water outlet of the fourth water pump, the fourth port of the second heat exchanger and the pipeline node E; the pipeline node E is respectively communicated with the fourth port of the first four-way valve, the pipeline node D and the first port of the third three-way valve; the first port of the third outdoor heat exchanger is communicated with the third port of the third three-way valve; the pipeline node F is respectively communicated with the second port of the third outdoor heat exchanger, the second port of the third three-way valve and the water inlet of the third water pump.

[0006] Furthermore, the above-mentioned control module controls the refrigerant flow by controlling the compressor, controls the coolant flow by controlling the first water pump, the second water pump, the third water pump and the fourth water pump, controls the air flow by controlling the fan and the blower, controls the heating power by controlling the heater, and controls the connectivity, 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 first three-way valve, the second three-way valve, the third three-way valve and the first four-way valve.

[0007] Furthermore, the control process of the above-mentioned low-temperature hybrid preheating mode is as follows: the control module controls the second electronic expansion valve, the first port and the fourth port of the first four-way valve, the first port of the second three-way valve and the third port of the third three-way valve to be closed, controls the first electronic expansion valve, the third electronic expansion valve, the first port of the first three-way valve, the second port and the third port, the second port and the third port of the second three-way valve, the first port and the second port of the third three-way valve and the second port and the third port of the first four-way valve to be opened, controls the refrigerant flow of the compressor, controls the coolant flow of the first water pump and the third water pump, controls the second water pump and the fourth water pump to be closed, controls the air flow of the fan and the blower, controls the heating power of the heater, realizes the heating of the cabin by the heat pump and the preheating of the electric drive system and the engine range extender in a low-temperature environment, thereby reducing the energy consumption of the thermal management system for heating in a low-temperature environment and enabling the power battery, the electric drive system and the engine range extender to operate in a high-efficiency range, thereby improving performance and efficiency.

[0008] Furthermore, the control process of the above-mentioned low-temperature hybrid heat pump heating and waste heat recovery mode is as follows: the control module controls the second electronic expansion valve, the second port and the fourth port of the first four-way valve, the first port of the second three-way valve and the second port of the third three-way valve to be closed, controls the first electronic expansion valve, the third electronic expansion valve, the first port of the first three-way valve, the second port and the third port, the second port and the third port of the second three-way valve, the first port and the third port of the third three-way valve and the first port and the third port of the first four-way valve to be opened, controls the heater to be closed, controls the refrigerant flow of the compressor, controls the coolant flow of the first water pump and the third water pump, controls the second water pump and the fourth water pump to be closed, and controls the air flow of the fan and the blower. This working mode utilizes the heat pump to heat the cockpit, the power battery, and the electric drive system. At the same time, when the engine range extender is working, it can effectively realize the recovery and utilization of the engine heat, and cool the engine at the same time, which greatly reduces the energy consumption of the thermal management system and improves the system efficiency.

[0009] Furthermore, the control process of the above-mentioned low-temperature pure electric heat pump heating mode is as follows: the control module controls the second electronic expansion valve, all ports of the first four-way valve, the first port of the second three-way valve and all ports of the third three-way valve to be closed, controls the first electronic expansion valve, the third electronic expansion valve, all ports of the first three-way valve and the second port and the third port of the second three-way valve to be opened, controls the heater to be closed, controls the refrigerant flow of the compressor, controls the coolant flow of the first water pump, controls the second water pump, the third water pump and the fourth water pump to be closed, and controls the air flow of the fan and the blower. This working mode works in a low-temperature environment, the engine is not working, and the electric drive system is working. The heat pump is used to heat the cabin, the power battery and the electric drive system, thereby reducing the energy consumption of the system.

[0010] Furthermore, the control process of the above-mentioned high-temperature hybrid heat dissipation cooling mode is as follows: the control module controls the first port and the second port of the first four-way valve, the third port of the first three-way valve, the third port of the second three-way valve and the second port of the third three-way valve to be closed, controls the first electronic expansion valve, the second electronic expansion valve, the third electronic expansion valve, the first port and the second port of the first three-way valve, the first port and the second port of the second three-way valve, the first port and the third port of the third three-way valve and the third port and the fourth port of the first four-way valve to be opened, controls the heater to be closed, controls the refrigerant flow of the compressor, controls the coolant flow of the second water pump and the third water pump, controls the first water pump and the fourth water pump to be closed, and controls the air flow of the fan to ensure the heat dissipation of the electric drive system, the power battery and the engine and the comfort of the cabin when the electric drive system and the engine range extender of the hybrid truck work simultaneously in a high temperature environment, thereby ensuring the thermal safety of the vehicle and reducing the energy consumption of the system.

[0011] Furthermore, the control process of the cooling and heat dissipation mode of the above-mentioned high-temperature pure electric system is as follows: the control module controls the third port and the fourth port of the first four-way valve, the third port of the first three-way valve, the third port of the second three-way valve and all ports of the third three-way valve to be closed, and controls the first electronic expansion valve, the second electronic expansion valve, the third electronic expansion valve, the first port and the second port of the first three-way valve, the first port and the second port of the second three-way valve and the first port and the second port of the first four-way valve to be opened, controls the heater to be closed, controls the refrigerant flow of the compressor, controls the coolant flow of the second water pump and the fourth water pump, controls the first water pump and the third water pump to be closed, and controls the fan air flow. This working mode is applied to the thermal management mode when only the electric drive system is working under high temperature environment. This mode ensures the comfort of the cabin under high temperature and the heat dissipation performance of the electric drive system and the power battery, solves the problem of insufficient heat dissipation of the thermal management system at high temperature, and ensures the safety of the thermal management system.

[0012] Furthermore, the fan provides the required air flow for heat exchange between the first outdoor heat exchanger refrigerant, the second outdoor heat exchanger coolant and the third outdoor heat exchanger coolant and the air; the blower provides the required air flow for heat exchange between the evaporator refrigerant and the heater core coolant and the air.

[0013] In a second aspect, the present application also provides a thermal management method for an extended-range hybrid light truck, which is applied to the thermal management system of the extended-range hybrid light truck as described in the first aspect; the method includes: when it is identified that the vehicle is in hybrid mode and the temperature of the coolant at the outlet of the electric drive system, the power battery, and the engine is low, starting the low-temperature hybrid preheating mode, and transferring heat to the cabin, the battery electric drive system, and the engine through heat pump heating; when it is identified that the vehicle is in hybrid mode and the heat pump efficiency is low, starting the low-temperature hybrid heat pump heating and waste heat recovery mode, using the engine to generate heat and recover the waste heat; when it is identified that the vehicle is in pure electric mode and needs to be heated, starting the low-temperature pure electric heat pump heating mode, and using the heat pump to heat the system; when it is identified that the vehicle is in hybrid mode and the electric drive system, the power battery, and the engine need to be cooled, starting the high-temperature hybrid heat dissipation cooling mode; when it is identified that the vehicle is in pure electric mode, the outlet coolant temperature of the electric drive system is too high, and the air temperature is high and the cabin needs to be cooled, starting the high-temperature pure electric system cooling mode.

[0014] The extended-range hybrid light truck thermal management system and method provided in the present application can achieve different thermal management modes by controlling various components through the control module, including low-temperature hybrid pre-heating mode, low-temperature hybrid heat pump heating and waste heat recovery mode, low-temperature pure electric heat pump heating mode, high-temperature hybrid heat dissipation mode and high-temperature pure electric system cooling mode, which can meet the different thermal management requirements of extended-range hybrid light trucks and reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A schematic diagram of a thermal management system for a range-extended hybrid light truck provided in an embodiment of the present application;

[0017] Figure 2 A schematic diagram of the connection of a control module in a thermal management system for a range-extended hybrid light truck provided in an embodiment of the present application;

[0018] Figure 3 A schematic diagram of the internal structure of a control module in a thermal management system for a range-extended hybrid light truck provided in an embodiment of the present application;

[0019] Figure 4 A system structure diagram of a thermal management system for a range-extended hybrid light truck in a low-temperature hybrid preheating mode provided by an embodiment of the present application;

[0020] Figure 5 A system structure diagram of a thermal management system for a range-extended hybrid light truck in a low-temperature hybrid heat pump heating and waste heat recovery mode provided in an embodiment of the present application;

[0021] Figure 6 A system structure diagram of a thermal management system for a range-extended hybrid light truck in a low-temperature pure electric heat pump heating mode provided by an embodiment of the present application;

[0022] Figure 7 A system structure diagram of a thermal management system for a range-extended hybrid light truck in a high-temperature hybrid heat dissipation cooling mode provided by an embodiment of the present application;

[0023] Figure 8 A system structure diagram of a thermal management system for a range-extended hybrid light truck provided in an embodiment of the present application in a high-temperature pure electric system cooling and heat dissipation mode;

[0024] Fig. 9 A flow chart of a thermal management method for an extended-range hybrid light truck provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] The technical solution of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0026] The thermal management system for extended-range hybrid vehicles in the prior art is relatively simple in structure and control method, resulting in large energy consumption during the control process. Therefore, it is particularly important to optimize the structure and control strategy of the thermal management system to ensure that higher energy efficiency and stability are achieved while meeting performance requirements. In the embodiments of the present application, by applying heat pump technology in extended-range hybrid vehicles, the overall energy efficiency and driving experience will be further improved. That is, the thermal management system and method of an extended-range hybrid light truck provided in the embodiments of the present application can achieve different thermal management modes through the control of multiple components by the control module, including low-temperature hybrid preheating mode, low-temperature hybrid heat pump heating and waste heat recovery mode, low-temperature pure electric heat pump heating mode, high-temperature hybrid heat dissipation cooling mode and high-temperature pure electric system cooling and heat dissipation mode, which can meet the different thermal management requirements of extended-range hybrid light trucks, reduce energy consumption, and achieve higher energy efficiency and stability.

[0027] To facilitate understanding of this embodiment, a thermal management system for an extended-range hybrid light truck disclosed in an embodiment of the present application is first introduced in detail.

[0028] Figure 1 A schematic diagram of a thermal management system for a range-extended hybrid light truck provided in an embodiment of the present application, the thermal management system 100 for the range-extended hybrid light truck includes: a control module 8000, a compressor 101, a water condenser 102, a first electronic expansion valve 103, a first outdoor heat exchanger 104, a fan 105, a second electronic expansion valve 106, a third electronic expansion valve 107, a second heat exchanger 108, an evaporator 109, a blower 110, a gas-liquid separator 111, a first water pump 201, a first three-way valve 202, an electric drive system 203, a heater 204, a power battery 205, a first heat exchanger 206, a second water pump 207, a second outdoor heat exchanger 208, a heater core 209, a second three-way valve 210, a third water pump 301, an engine 302, a first four-way valve 303, a fourth water pump 304, a third three-way valve 305 and a third outdoor heat exchanger 306;

[0029] The selection and functions of the above components are described as follows:

[0030] The compressor 101 uses a scroll type or other type of electric compressor, and its function is to evaporate and compress the refrigerant into superheated steam and promote its flow in the refrigerant circulation system. Among them, the water pump type used in the first water pump 201, the second water pump 207, the third water pump 301 and the fourth water pump 304 is an electric water pump, which promotes the coolant to flow in the coolant circulation system. Among them, the first heat exchanger 206 and the second heat exchanger 108 are water-side heat exchangers, which provide heat exchange between coolant and coolant and between coolant and refrigerant respectively. Among them, the first outdoor heat exchanger 104 and the evaporator 109 are air-side heat exchangers, which provide heat exchange between air and refrigerant. Among them, the heater core 209, the second outdoor heat exchanger 208 and the third outdoor heat exchanger 306 are air-side heat exchangers, which provide heat exchange between air and coolant. Wherein, the first electronic expansion valve 103, the second electronic expansion valve 106 and the third electronic expansion valve 107 can be electromagnetic expansion valves or electric expansion valves, and the temperature accuracy of superheat or subcooling can be achieved by controlling the valve hole opening. Wherein, the first three-way valve 202, the second three-way valve 210, the third three-way valve 305 and the first four-way valve 303 can be electromagnetic valves, or they can be set as other types of valves, and they can be reasonably replaced as long as they meet the specific connection mode. Wherein, the blower 110 can be different types of electric blowers, which not only provide the required air flow for the heat exchange between the refrigerant and the air of the evaporator 109, but also provide the required air flow for the heat exchange between the coolant and the air of the heater core 209. Wherein, the fan 105 can be different types of fans, which not only provide the required air flow for the heat exchange between the refrigerant and the air of the first outdoor heat exchanger 104, but also provide the required air flow for the heat exchange between the coolant and the air of the second outdoor heat exchanger 208 and the third outdoor heat exchanger 306. Wherein, the gas-liquid separator 111 separates the liquid refrigerant and the gaseous refrigerant in the refrigerant cycle. The purpose of the first three-way valve 202, the second three-way valve 210, the third three-way valve 305 and the first four-way valve 303 is to control the connection and disconnection of adjacent components at their valve ports to achieve the purpose of operating in different modes.

[0031] like Figure 1 As shown, the general connection relationship of the above components is as follows:

[0032] The compressor 101, the water condenser 102, the first electronic expansion valve 103, the first outdoor heat exchanger 104, the second electronic expansion valve 106, the evaporator 109, the node B, the gas-liquid separator 111, and the compressor 101 are connected in sequence to form a first closed loop; the water condenser 102, the first water pump 201, the first three-way valve 202, the heater 204, the first heat exchanger 206, the second water pump 207, the heater core 209, the node C, and the water condenser 102 are connected in sequence to form a second closed loop; the first water pump 201, the electric drive system 203, the power battery 205, the second three-way valve 210, the second outdoor heat exchanger 208, the node G, and the node C are connected in sequence. The second outdoor heat exchanger 208 is also connected to the node G; the first heat exchanger 206 is also connected to the fourth water pump 304 and the first four-way valve 303 respectively; the first four-way valve 303 is respectively connected to the second heat exchanger 108, the node E, and the engine 302; the second heat exchanger 108 is respectively connected to the node B, the third electronic expansion valve 107, and the node D; the node D is respectively connected to the node E and the fourth water pump 304; the third electronic expansion valve 107 is also connected to the node A; the node E, the third three-way valve 305, the third outdoor heat exchanger 306, the node F, the third water pump 301, and the engine 302 are sequentially connected; and the node F is also connected to the third three-way valve 305.

[0033] The specific connection relationship is as follows:

[0034] The air inlet 1012 of the compressor 101 is connected to the outlet 1111 of the gas-liquid separator 111; the second port 1022 of the water condenser 102 is connected to the exhaust port 1011 of the compressor 101; the first port 1021 of the water condenser 102 is connected to the second port 1032 of the first electronic expansion valve 103; the first port 1031 of the first electronic expansion valve 103 is connected to the inlet 1042 of the first outdoor heat exchanger 104; the pipeline node A is connected to the outlet 1041 of the first outdoor heat exchanger 104, the second electric expansion valve 103 and the first electric expansion valve 103. The second port 1062 of the sub-expansion valve 106 is connected to the second port 1072 of the third electronic expansion valve 107; the first port 1061 of the second electronic expansion valve 106 is connected to the second port 1092 of the evaporator 109; the pipeline node B is respectively connected to the first port 1091 of the evaporator 109, the first port 1081 of the second heat exchanger 108 and the inlet 1112 of the gas-liquid separator 111; the first port 1071 of the third electronic expansion valve 107 is connected to the first port 1081 of the second heat exchanger 108. The water outlet 2011 of the first water pump 201 is connected to the third port 2023 of the first three-way valve 202; the second port 2022 of the first three-way valve 202 is connected to the second port 2042 of the heater 204; the second port 2062 of the first heat exchanger 206 is connected to the first port 2041 of the heater 204; the water inlet 2072 of the second water pump 207 is connected to the first port 2061 of the first heat exchanger 206; the second port 2092 of the heater core 209 is connected to the water outlet 2071 of the second water pump 207; the pipeline node C is respectively connected to the first port 2091 of the heater core 209, the node G and the fourth port 1024 of the water condenser 102; the water cooling The third port 1023 of the condenser 102 is connected to the water inlet 2012 of the first water pump 201; the second port 2032 of the electric drive system 203 is connected to the first port 2021 of the first three-way valve 202; the second port 2052 of the power battery 205 is connected to the first port 2031 of the electric drive system 203; the second port 2102 and the first port 2101 of the second three-way valve 210 are respectively connected to the first port 2051 of the power battery 205 and the second port 2082 of the second outdoor heat exchanger 208; the pipeline node G is respectively connected to the pipeline node C, the third port 2103 of the second three-way valve 210 and the first port 2081 of the second outdoor heat exchanger 208.The water outlet 3011 of the third water pump 301 is connected to the second port 3022 of the engine 302; the first four-way valve 303 is connected to the first port 3021 of the engine 302, the fourth port 2064 of the first heat exchanger 206, the third port 1083 of the second heat exchanger 108 and the pipeline node E respectively; the water inlet 3042 of the fourth water pump 304 is connected to the third port 2063 of the first heat exchanger 206; the node D is connected to the water outlet 3041 of the fourth water pump 304, the fourth port 2064 of the second heat exchanger 108 and the pipeline node E respectively; The four-port 1084 is connected to the pipeline node E; the pipeline node E is respectively connected to the fourth port 3034 of the first four-way valve 303, the pipeline node D and the first port 3051 of the third three-way valve 305; the first port 3061 of the third outdoor heat exchanger 306 is connected to the third port 3053 of the third three-way valve 305; the pipeline node F is respectively connected to the second port 3062 of the third outdoor heat exchanger 306, the second port 3052 of the third three-way valve 305 and the water inlet 3012 of the third water pump 301.

[0035] The control module 8000 is respectively connected to the compressor 101, the first electronic expansion valve 103, the second electronic expansion valve 106, the third electronic expansion valve 107, the first water pump 201, the second water pump 207, the third water pump 301, the fourth water pump 304, the heater 204, the first three-way valve 202, the second three-way valve 210, the third three-way valve 305, the first four-way valve 303, the blower 110 and the fan 105 to achieve communication connection; the specific connection relationship is as follows Figure 2 shown.

[0036] The control module 8000 determines the working state of each component of the vehicle thermal management system 100. The output interface 8005 of the control module 8000 8101, 8102, 8103, 8104, 8105, 8106, 8107, 8108, 8109, 8110, 8111, 8112, 8113, 8114 and 8115 are respectively connected to the compressor 101, the first electronic expansion valve 103, the fan 105, the second electronic expansion valve 106, the third electronic expansion valve 107, the blower 110, the first water pump 201, the first three-way valve 202, the heater 204, the second water pump 207, the third water pump 301, the first four-way valve 303, the third three-way valve 305, the fourth water pump 304 and the second three-way valve 210 to achieve communication connection. The control module 8000 controls the compressor 101 to control the refrigerant flow. The control module 8000 controls the first water pump 201, the second water pump 207, the third water pump 301 and the fourth water pump 304 to control the flow of the coolant. The control module 8000 controls the heater 204 to control the heating power. The control module 8000 controls the first electronic expansion valve 103, the second electronic expansion valve 106, the third electronic expansion valve 107, the first three-way valve 202, the second three-way valve 210, the third three-way valve 305 and the first four-way valve 303 to control the connection, disconnection or realization of the specified flow state of the fluid. The control module 8000 controls the air flow by controlling the blower 110 and the fan 105.

[0037] Figure 3 This is a schematic diagram of the internal structure of the control module. Figure 3 As shown, the control module 8000 includes a bus 8001, an input interface 8002, a memory 8003, a processor 8004, and an output interface 8005. Specifically, the memory 8003 is used to store programs, instructions, and data, and the processor 8004 reads programs, instructions, and data from the memory 8003 and can write data to the memory 8003. By executing the program and instruction read by the memory 8003, the processor 8004 implements signal exchange through the input interface 8002 and the output interface 8005. Figure 3As shown, the input interface 8002 of the control module 8000 receives the operation request and other operation parameters of the vehicle thermal management system 100 through the connection 8200, and the output interface 8005 of 8101, 8102, 8103, 8104, 8105, 8106, 8107, 8108, 8109, 8110, 8111, 8112, 8113, 8114 and 8115 respectively communicate with the compressor 101, the first electronic expansion valve 103, the fan 105, the second electronic expansion valve 106, the third electronic expansion valve 107, the blower 110, the first water pump 201, the first three-way valve 202, the heater 204, the second water pump 207, the third water pump 301, the first four-way valve 303, the third three-way valve 305, the fourth water pump 304 and the second three-way valve 210 to achieve communication connection. The processor 8004 controls the operation of the vehicle thermal management system 100 through the programs and instructions in the memory 8003. Specifically, the control module 8000 can receive operation requests or signals of other components for controlling the vehicle thermal management system 100 through the input interface 8002, and send control signals to each controlled component through the output interface 8005, so that the vehicle thermal management system 100 can operate in a specified working mode and can switch between different modes.

[0038] The above-mentioned control module 8000 can control the refrigerant flow by controlling the compressor 101, control the coolant flow by controlling the first water pump 201, the second water pump 207, the third water pump 301 and the fourth water pump 304, control the air flow by controlling the fan 105 and the blower 110, control the heating power by controlling the heater 204, and control the connectivity, closure or specified flow state of the fluid by controlling the first electronic expansion valve 103, the second electronic expansion valve 106, the third electronic expansion valve 107, the first three-way valve 202, the second three-way valve 210, the third three-way valve 305 and the first four-way valve 303.

[0039] Based on the above system structure, through the control of the control module 8000, multiple working modes can be realized, including low-temperature hybrid preheating mode, low-temperature hybrid heat pump heating and waste heat recovery mode, low-temperature pure electric heat pump heating mode, high-temperature hybrid heat dissipation mode and high-temperature pure electric system cooling mode, covering various thermal management needs under all-weather conditions and different working conditions, and reducing energy consumption through reasonable waste heat utilization, achieving higher energy efficiency and stability.

[0040] Figure 4-Figure 8 1 is a system structure diagram of the thermal management system 100 operating in different working modes, wherein the dashed arrows represent the flow direction and flow path of the coolant, and the solid arrows represent the flow direction and flow path of the refrigerant. The control process of each mode is described in detail below:

[0041] (1) Low-temperature hybrid preheating mode:

[0042] The control module 8000 controls the second electronic expansion valve 106, the first port 3031 and the fourth port 3034 of the first four-way valve 303, the first port 2101 of the second three-way valve 210, and the third port 3053 of the third three-way valve 305 to be closed, and controls the first electronic expansion valve 103, the third electronic expansion valve 107, the first port 2021, the second port 2022 and the third port 2023 of the first three-way valve 202, the second port 2102 and the third port 2103 of the second three-way valve 210, the first port 3051 and the second port 3052 of the third three-way valve 305, and the first four-way valve 30 The second port 3032 and the third port 3033 are opened to control the refrigerant flow of the compressor 101, control the coolant flow of the first water pump 201 and the third water pump 301, control the second water pump 207 and the fourth water pump 304 to be turned off, control the air flow of the fan 105 and the blower 110, and control the heating power of the heater 204, so as to realize the heating of the cabin by the heat pump and the preheating of the electric drive system and the engine range extender in a low temperature environment, thereby reducing the energy consumption of the thermal management system for heating in a low temperature environment and enabling the power battery, the electric drive system and the engine range extender to work in a high efficiency range, thereby improving performance and efficiency.

[0043] Figure 4 This is a system diagram of the thermal management system in the low-temperature hybrid preheating mode. In a low-temperature environment, when the vehicle power system is a hybrid power system, the thermal management system 100 receives a cabin heating command (or the control module 8000 automatically generates a cabin heating command) and recognizes that the outlet coolant temperature of the electric drive system 203, the power battery 205, and the engine 303 is low. The heat can be transferred to the cabin, the battery electric drive system, and the engine through heat pump heating. Figure 4As shown, high-temperature and high-pressure refrigerant flows out from the exhaust port 1011 of the compressor 101 and flows into the refrigerant channel inlet 1022 of the water condenser 102. Under the condensation effect of the water condenser 102, the refrigerant changes from gas to liquid. The liquid high-pressure refrigerant flows out from the refrigerant channel outlet 1021 of the water condenser 102 through the first electronic expansion valve 103, and under the action of the first electronic expansion valve 103 to reduce pressure and increase accumulation, a low-temperature and low-pressure liquid mist mixture is formed, which flows to the second port 1042 of the first outdoor heat exchanger 104. At this time, the first outdoor heat exchanger 104 is used as an evaporator, which absorbs a large amount of heat in the ambient air, so that the refrigerant becomes gaseous and flows out from the first port 1041 of the first outdoor heat exchanger 104, flows into the second port 1072 of the third electronic expansion valve 107 through the pipeline node A, flows into the second port 1082 of the second heat exchanger 108 through the first port 1071, and then is discharged from the first port 1081 of the second heat exchanger 108 and flows into the inlet 1112 of the gas-liquid separator 111 through the node B, and the liquid refrigerant and the gaseous refrigerant are separated by the gas-liquid separator 111. The air inlet 1012 of the compressor 101 sucks in the gaseous refrigerant from the outlet 1111 of the gas-liquid separator 111, and starts the next refrigerant cycle. On the other hand, when the low-temperature coolant flows through the coolant channel of the water condenser 102, it absorbs the heat of the refrigerant to produce high-temperature coolant. The high-temperature coolant will then be pumped out by the water outlet 2011 of the first water pump 201 and flow into the third port 2023 of the first three-way valve 202, and then flow from the first port 2021 and the second port 2022 of the first three-way valve 202 to the second port 2032 of the electric drive system 203 and the second port 2042 of the heater 204 respectively. The heater 204 can release heat to the coolant at the second port 2042 as needed, thereby improving the power and system efficiency of cabin heating. Next, the coolant flows from the first port 2041 of the heater 204 to the second port 2062 of the first heat exchanger 206, and heats the coolant in the engine cooling circuit through the first heat exchanger. Thereafter, the coolant flows from the first port 2061 to the water inlet 2072 of the second water pump 207 and flows out from the water outlet 2071, and flows into the second port 2092 of the heater core 209. When passing through the heater core 209, the high-temperature coolant releases heat to the air blown out by the blower 110 to heat the cabin, and turns back into low-temperature coolant at the second port 2091 of the heater core 209, and then flows through the node C, and flows out from the third port 1023 of the water condenser 102 into the water inlet 2012 of the first water pump 201 to form a cabin heating coolant circulation. At the same time, the high-temperature coolant flowing out from the first port 2021 of the first three-way valve 202 flows through the electric drive system 203 and the power battery 205 in sequence, thereby heating the electric drive system and the power battery, and flows in through the second port 2102 of the second three-way valve 210, flows out from the third port 2103, finally flows through the node G and merges with the coolant of the heated cabin and the engine at the node C, thereby heating the electric drive system and the power battery.In the engine cooling circuit, the low-temperature coolant flows from the water outlet 3011 of the third water pump 301 to the second port 3022 of the engine 302, then flows from the first port 3021 of the engine 302 through the second three-way valve 303, and flows from the second port 3032 of the second three-way valve to the fourth port 2064 of the first heat exchanger 206, exchanges heat with the high-temperature coolant of the heated cabin through the first heat exchanger, thereby heating the coolant in the engine cooling circuit, and then the high-temperature coolant flows out from the third port 2063 of the first heat exchanger 206, flows through the fourth water pump 304, flows into the first port 3051 of the third three-way valve 305 through nodes D and E, and finally flows back to the water inlet 3012 of the third water pump 301 from the second port 3052 of the third three-way valve 305, completing the circulation of the engine cooling circuit, thereby preheating the engine.

[0044] (2) Low-temperature hybrid heat pump heating and waste heat recovery mode:

[0045] The control module 8000 controls the second electronic expansion valve 106, the second port 3032 and the fourth port 3034 of the first four-way valve 303, the first port 2101 of the second three-way valve 210, and the second port 3052 of the third three-way valve 305 to be closed, and controls the first electronic expansion valve 103, the third electronic expansion valve 107, the first port 2021, the second port 2022 and the third port 2023 of the first three-way valve 202, the second port 2102 and the third port 2103 of the second three-way valve 210, the first port 3051 and the third port 3053 of the third three-way valve 305, and the first four-way valve 303. The first port 3031 and the third port 3033 are opened, the heater 204 is controlled to be closed, the refrigerant flow of the compressor 101 is controlled, the coolant flow of the first water pump 201 and the third water pump 301 is controlled, the second water pump 207 and the fourth water pump 304 are controlled to be closed, and the air flow of the fan 105 and the blower 110 is controlled. This working mode utilizes the heat pump to heat the cabin, power battery, and electric drive system. At the same time, when the engine extender is working, it can effectively recycle the engine heat and cool the engine at the same time, greatly reducing the energy consumption of the thermal management system and improving the system efficiency.

[0046] Figure 5 This is a system diagram of the thermal management system in the low-temperature hybrid heat pump heating and waste heat recovery mode. When the thermal management system 100 recognizes that the vehicle is in hybrid mode and the heat pump efficiency is low, the engine heat is generated and the waste heat is recovered. Figure 4The working modes shown are exactly the same, so they will not be described again here. In this mode, the temperature of the coolant at the first port 3021 of the engine 302 is relatively high, and the high-temperature coolant will pass through the first four-way valve 303 and flow to the third port 1083 of the second heat exchanger 108 through the first port. At this time, the high-temperature coolant will transfer heat to the refrigeration circuit, thereby realizing the recovery of the waste heat of the engine.

[0047] (3) Low temperature pure electric heat pump heating mode:

[0048] The control module 8000 controls the second electronic expansion valve 106, all ports of the first four-way valve 303, the first port 2101 of the second three-way valve 210 and all ports of the third three-way valve 305 to be closed, controls the first electronic expansion valve 103, the third electronic expansion valve 107, all ports of the first three-way valve 202 and the second port 2102 and the third port 2103 of the second three-way valve 210 to be open, controls the heater 204 to be closed, controls the refrigerant flow of the compressor 101, controls the coolant flow of the first water pump 201, controls the second water pump 207, the third water pump 301 and the fourth water pump 304 to be closed, and controls the air flow of the fan 105 and the blower 110. This working mode works in a low temperature environment, the engine is not working, and the electric drive system is working. The heat pump is used to heat the cabin, the power battery and the electric drive system, thereby reducing the energy consumption of the system.

[0049] Figure 6 This is a system diagram of the thermal management system in the low-temperature pure electric heat pump heating mode. When the vehicle thermal management system 100 recognizes that the vehicle is in pure electric mode and needs to be heated, the heat pump is used to heat the system. The refrigerant cycle and cabin heating cycle in this mode are Figure 4 The operating mode shown is identical and will not be described again here. In this mode, the engine cooling circuit is deactivated.

[0050] (4) High temperature hybrid cooling mode:

[0051] The control module 8000 controls the first port 3031 and the second port 3032 of the first four-way valve 303, the third port 2023 of the first three-way valve 202, the third port 2103 of the second three-way valve 210, and the second port 3052 of the third three-way valve 305 to be closed, and controls the first electronic expansion valve 103, the second electronic expansion valve 106, the third electronic expansion valve 107, the first port 2021 and the second port 2022 of the first three-way valve 202, the first port 2101 and the second port 2102 of the second three-way valve 210, and the first port 3052 of the third three-way valve 305 to be closed. 1 and the third port 3053 and the third port 3033 and the fourth port 3034 of the first four-way valve 303 are opened, the heater 204 is controlled to be closed, the refrigerant flow of the compressor 101 is controlled, the coolant flow of the second water pump 207 and the third water pump 301 is controlled, the first water pump 201 and the fourth water pump 304 are controlled to be closed, and the air flow of the fan 105 is controlled to ensure the heat dissipation of the electric drive system, the power battery and the engine and the comfort of the cabin when the electric drive system of the hybrid truck and the engine range extender work simultaneously in a high temperature environment, ensure the thermal safety of the vehicle, and reduce the energy consumption of the system.

[0052] Figure 7This is a system diagram of the thermal management system in high-temperature hybrid heat dissipation cooling mode. In a high-temperature environment, there is a cooling demand for the cabin and the electric drive system, power battery and engine need to be cooled. When the thermal management system 100 recognizes that the vehicle is in hybrid mode and needs to be cooled, this mode is activated. In this mode, the high-temperature and high-pressure refrigerant flowing out of the exhaust port 1011 of the compressor 101 flows into the refrigerant channel inlet 1022 of the water condenser 102. Under the condensation action of the water condenser 102, the refrigerant changes from gas to liquid. The liquid high-pressure refrigerant flows out from the refrigerant channel outlet 1021 of the water condenser 102, flows through the first electronic expansion valve 103 to the second port 1042 of the first outdoor heat exchanger 104. At this time, the first outdoor heat exchanger 104 is used as a radiator, which releases a large amount of heat to the ambient air, so that the refrigerant becomes liquid and flows out from the first port 1041 of the first outdoor heat exchanger 104, passes through the pipeline node A, and flows into the second port 1072 of the third electronic expansion valve 107 and the second port 1062 of the second electronic expansion valve 106, and passes through the second Under the action of the decompression and accumulation of the electronic expansion valve 106 and the third electronic expansion valve 107, a low-temperature and low-pressure mist coolant is formed and flows to the second port 1122 of the evaporator 112 and the second port 1082 of the second heat exchanger 108. At this time, the refrigerant is controlled by the blower 110 so as to reduce the cabin temperature and absorb the heat in the cabin. Then, it is discharged from the first port 1081 of the second heat exchanger 108 and flows into the inlet 1112 of the gas-liquid separator 111 through the node B. The liquid refrigerant and the gaseous refrigerant are separated through the gas-liquid separator 111. The air inlet 1012 of the compressor 101 inhales the gaseous refrigerant from the outlet 1111 of the gas-liquid separator 111, and the next refrigerant cycle starts. In the electric drive cooling system, the coolant exchanges heat with the heat generated by the power battery 205 and the electric drive system 203, and then flows to the first port 2021 of the first three-way valve 202, is discharged from the second port 2022 of the first three-way valve 202, flows through the heater 204 to the second port 2062 of the first heat exchanger 206, flows to the water inlet of the second water pump 207 through the first heat exchanger 206, then flows through the heater core 209 and flows to the second outdoor heat exchanger through nodes C and G. Under the fan control of the fan 105, the high-temperature coolant at the first port 2081 of the second outdoor heat exchanger 208 exchanges heat and cools down with the air, and the second port 2082 of the second outdoor heat exchanger 208 forms a low-temperature coolant, which finally flows to the power battery 205, thereby cooling the power battery, the electric drive system and the engine.In the engine cooling circuit, the high-temperature coolant flows from the first port 3021 of the engine 302 to the fourth port 3034 of the first four-way valve 303, and is then discharged from the fourth port 3034. After passing through the node E, it flows to the first port 3051 of the third three-way valve 305, and is then discharged from the third port 3053 to the third outdoor heat exchanger 306. Under the fan control of the fan 105, the high-temperature coolant at the first port 3061 of the third outdoor heat exchanger 306 exchanges heat and cools down with the air, and the second port 3062 of the third outdoor heat exchanger 306 forms a low-temperature coolant and flows to the water inlet 3012 of the third water pump 301, and the next cooling cycle is started through the water pump.

[0053] (5) High temperature pure electric system cooling mode:

[0054] The control module 8000 controls the third port 3033 and the fourth port 3034 of the first four-way valve 303, the third port 2023 of the first three-way valve 202, the third port 2103 of the second three-way valve 210, and all ports of the third three-way valve 305 to be closed, and controls the first electronic expansion valve 103, the second electronic expansion valve 106, the third electronic expansion valve 107, the first port 2021 and the second port 2022 of the first three-way valve 202, the first port 2101 and the second port 2102 of the second three-way valve 210, and the first port 303 of the first four-way valve 303 to be closed. 1 and the second port 3032 are opened, the heater 204 is controlled to be closed, the refrigerant flow of the compressor 101 is controlled, the coolant flow of the second water pump 207 and the fourth water pump 304 is controlled, the first water pump 201 and the third water pump 301 are controlled to be closed, and the air flow of the fan 105 is controlled. This working mode is applied to the thermal management mode under the working condition of only the electric drive system in a high temperature environment. This mode ensures the comfort of the cabin under high temperature and the heat dissipation performance of the electric drive system and the power battery, solves the problem of insufficient heat dissipation of the thermal management system under high temperature, and ensures the safety of the thermal management system.

[0055] Figure 8 This is a system diagram of the thermal management system in the high-temperature pure electric system cooling and heat dissipation mode. This mode is used when the vehicle thermal management system 100 recognizes that the vehicle is in pure electric mode, the outlet coolant temperature of the electric drive system 203 is too high, and the air temperature is high and the cabin needs to be cooled. The cabin cooling cycle in this mode is similar to Figure 7In the battery electric drive cooling cycle, the high-temperature refrigerant flows out from the second port 2032 of the electric drive system 203, flows through the first three-way valve 202 and flows through the heater 204 from the second port 2022 to the second port 2062 of the first heat exchanger 20. In the second heat exchanger, the high-temperature coolant exchanges heat with the low-temperature coolant flowing through the second heat exchanger 108, thereby achieving the initial cooling of the coolant. After that, it flows out from the first port 2061 of the first heat exchanger 206 and flows to the second water pump 207. The water flows through the water outlet of the second water pump 207 and then flows through the heater core 209 and flows from the node C and the node E to the first port 2081 of the second outdoor heat exchanger 208. Under the fan control of the fan 105, the high-temperature coolant in the second outdoor heat exchanger 208 exchanges heat and cools down with the air, and forms a low-temperature coolant at the second port 2082 of the second outdoor heat exchanger 208 and flows to the first port 2051 of the power battery 205, thereby realizing the cooling of the power battery and the electric drive system. In the supplementary cooling circuit, the high-temperature coolant that has undergone heat exchange flows out from the third port 2063 of the first heat exchanger 206, flows into the water inlet 3042 of the fourth water pump 304, flows out from the water outlet 3041 and then flows to the fourth port 1084 of the second heat exchanger 108, exchanges heat with the low-temperature coolant of the refrigeration circuit in the second heat exchanger 108, then flows out from the third port 1083 and flows to the first port 3031 of the first four-way valve 303, and then flows from the second port 3032 to the fourth port 2064 of the first heat exchanger 206, thereby realizing a cooling cycle and ultimately achieving cabin cooling and efficient heat dissipation of the power system under high temperature conditions.

[0056] Based on the above system embodiment, the present application also provides a method for thermal management of a range-extended hybrid light truck. The method is applied to the thermal management system of the range-extended hybrid light truck as described above. Fig. 9 As shown, the system is used to perform the following method steps:

[0057] Step S902, when the vehicle is identified as being in hybrid mode and the electric drive system, power battery, and engine outlet coolant temperature are identified as being low, the low-temperature hybrid preheating mode is started to transfer heat to the cabin, battery electric drive system, and engine through heat pump heating;

[0058] Step S904, when it is identified that the vehicle is in hybrid mode and the heat pump efficiency is low, the low-temperature hybrid heat pump heating and waste heat recovery mode is started to utilize the engine to generate heat and recover the waste heat;

[0059] Step S906, when it is identified that the vehicle is in pure electric mode and needs to be heated, the low-temperature pure electric heat pump heating mode is started to heat the system using the heat pump;

[0060] Step S908, when it is identified that the vehicle is in hybrid mode and the electric drive system, power battery and engine need to be cooled, the high temperature hybrid heat dissipation cooling mode is started;

[0061] Step S910, when it is identified that the vehicle is in pure electric mode, the coolant temperature at the outlet of the electric drive system is too high, and the air temperature is high and the cabin needs to be cooled, the high-temperature pure electric system cooling and heat dissipation mode is started.

[0062] The specific control process of the above-mentioned multiple modes can be found in the contents described in the aforementioned system embodiment, which will not be repeated here.

[0063] The method provided in the embodiment of the present application has the same implementation principle and technical effects as those of the aforementioned system embodiment. For the sake of brief description, for matters not mentioned in the embodiment of the method, reference may be made to the corresponding contents in the aforementioned system embodiment.

[0064] An embodiment of the present application also provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement the above method. The specific implementation can be found in the aforementioned method embodiment, which will not be repeated here.

[0065] The computer program products of the methods, devices, and electronic devices provided in the embodiments of the present application include a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the methods described in the previous method embodiments. The specific implementation can be found in the method embodiments, which will not be repeated here.

[0066] Unless otherwise specifically stated, the relative steps, numerical expressions and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0067] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0068] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0069] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A thermal management system for a range-extended hybrid light truck, characterized in that: The system comprises: a control module (8000), a compressor (101), a water condenser (102), a first electronic expansion valve (103), a first outdoor heat exchanger (104), a fan (105), a second electronic expansion valve (106), a third electronic expansion valve (107), a second heat exchanger (108), an evaporator (109), a blower (110), a gas-liquid separator (111), a first water pump (201), a first three-way valve (202), an electric drive system (203), a heater (204), a power battery (205), a first heat exchanger (206), a second water pump (207), a second outdoor heat exchanger (208), a heater core (209), a second three-way valve (210), a third water pump (301), an engine (302), a first four-way valve (303), a fourth water pump (304), a third three-way valve (305) and a third outdoor heat exchanger (306); The compressor (101), the water condenser (102), the first electronic expansion valve (103), the first outdoor heat exchanger (104), the second electronic expansion valve (106), the evaporator (109), the node B, the gas-liquid separator (111), and the compressor (101) are connected in sequence to form a first closed loop; the water condenser (102), the first water pump (201), the first three-way valve (202), the heater (204), the first heat exchanger (206), the second water pump (207), the heater core (209), the node C, and the water condenser (102) are connected in sequence to form a second closed loop; the first water pump (201), the electric drive system (203), the power battery (205), the second three-way valve (210), the second outdoor heat exchanger (208), the node G and node C are connected in sequence, and the second outdoor heat exchanger (208) is also connected to node G; the first heat exchanger (206) is also connected to the fourth water pump (304) and the first four-way valve (303) respectively; the first four-way valve (303) is respectively connected to the second heat exchanger (108), node E, and the engine (302); the second heat exchanger (108) is respectively connected to node B, the third electronic expansion valve (107), and node D; node D is respectively connected to node E and the fourth water pump (304); the third electronic expansion valve (107) is also connected to node A; node E, the third three-way valve (305), the third outdoor heat exchanger (306), node F, the third water pump (301), and the engine (302) are connected in sequence; node F is also connected to the third three-way valve (305); The control module (8000) is respectively connected to the compressor (101), the first electronic expansion valve (103), the second electronic expansion valve (106), the third electronic expansion valve (107), the first water pump (201), the second water pump (207), the third water pump (301), the fourth water pump (304), the heater (204), the first three-way valve (202), the second three-way valve (210), the third three-way valve (305), the first four-way valve (303), the blower (110) and the fan (105); Through the control of the control module (8000), multiple operating modes are realized, including a low-temperature hybrid preheating mode, a low-temperature hybrid heat pump heating and waste heat recovery mode, a low-temperature pure electric heat pump heating mode, a high-temperature hybrid heat dissipation cooling mode and a high-temperature pure electric system cooling mode, so as to meet different thermal management requirements.

2. The system according to claim 1, characterized in that The air intake port (1012) of the compressor (101) is in communication with the outlet (1111) of the gas-liquid separator (111); the second port (1022) of the water condenser (102) is in communication with the air exhaust port (1011) of the compressor (101); the first port (1021) of the water condenser (102) is in communication with the second port (1032) of the first electronic expansion valve (103); the first port (1031) of the first electronic expansion valve (103) is in communication with the inlet (1042) of the first outdoor heat exchanger (104); the pipeline node A is respectively in communication with the outlet (1041) of the first outdoor heat exchanger (104), the second port (1062) of the second electronic expansion valve (106) and the second port (1072) of the third electronic expansion valve (107). ); the first port (1061) of the second electronic expansion valve (106) is in communication with the second port (1092) of the evaporator (109); the pipeline node B is in communication with the first port (1091) of the evaporator (109), the first port (1081) of the second heat exchanger (108) and the inlet (1112) of the gas-liquid separator (111) respectively; the first port (1071) of the third electronic expansion valve (107) is in communication with the first port (1081) of the second heat exchanger (108); the water outlet (2011) of the first water pump (201) is in communication with the third port (2023) of the first three-way valve (202); the second port (2022) of the first three-way valve (202) is in communication with the second port (2042) of the heater (204) The first heat exchanger (206) and the first port (2041) of the heater (204) are in communication; the second port (2062) of the first heat exchanger (206) and the first port (2041) of the heater (204) are in communication; the water inlet (2072) of the second water pump (207) and the first port (2061) of the first heat exchanger (206) are in communication; the second port (2092) of the heater core (209) and the water outlet (2071) of the second water pump (207) are in communication; the pipeline node C and the first port (2091) of the heater core (209), the node G and the fourth port (1024) of the water condenser (102) are in communication with each other; the third port (1023) of the water condenser (102) and the water inlet (2012) of the first water pump (201); the second port (2032) of the electric drive system (203) and the The first port (2021) of the first three-way valve (202) is in communication with the first port (2021) of the electric drive system (203); the second port (2052) of the power battery (205) is in communication with the first port (2031) of the electric drive system (203); the second port (2102) and the first port (2101) of the second three-way valve (210) are in communication with the first port (2051) of the power battery (205) and the second port (2082) of the second outdoor heat exchanger (208) respectively; the pipeline node G is in communication with the pipeline node C, the third port (2103) of the second three-way valve (210) and the first port (2081) of the second outdoor heat exchanger (208) respectively; the water outlet (3011) of the third water pump (301) is in communication with the second port (3022) of the engine (302);The first four-way valve (303) is respectively connected to the first port (3021) of the engine (302), the fourth port (2064) of the first heat exchanger (206), the third port (1083) of the second heat exchanger (108) and the pipeline node E; the water inlet (3042) of the fourth water pump (304) is connected to the third port (2063) of the first heat exchanger (206); the node D is respectively connected to the water outlet (3041) of the fourth water pump (304), the fourth port (1084) of the second heat exchanger (108) and the pipeline node E ; The pipeline node E is respectively connected to the fourth port (3034) of the first four-way valve (303), the pipeline node D and the first port (3051) of the third three-way valve (305); the first port (3061) of the third outdoor heat exchanger (306) is connected to the third port (3053) of the third three-way valve (305); the pipeline node F is respectively connected to the second port (3062) of the third outdoor heat exchanger (306), the second port (3052) of the third three-way valve (305) and the water inlet (3012) of the third water pump (301). ; 3. The system according to claim 1, characterized in that 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 (207), the third water pump (301) and the fourth water pump (304), controls the air flow by controlling the fan (105) and the blower (110), controls the heating power by controlling the heater (204), and controls the fluid connection, closing or specified flow state by controlling the first electronic expansion valve (103), the second electronic expansion valve (106), the third electronic expansion valve (107), the first three-way valve (202), the second three-way valve (210), the third three-way valve (305) and the first four-way valve (303).

4. The system according to claim 1, characterized in that The control process of low temperature hybrid preheating mode is as follows: The control module (8000) controls the second electronic expansion valve (106), the first port (3031) and the fourth port (3034) of the first four-way valve (303), the first port (2101) of the second three-way valve (210) and the third port (3053) of the third three-way valve (305) to be closed, and controls the first electronic expansion valve (103), the third electronic expansion valve (107), the first port (2021), the second port (2022) and the third port (2023) of the first three-way valve (202), the second port (2102) and the third port (2103) of the second three-way valve (210), the first port (3051) and the second port (3053) of the third three-way valve (305) to be closed. 2) and the second port (3032) and the third port (3033) of the first four-way valve (303) are opened, the refrigerant flow of the compressor (101) is controlled, the coolant flow of the first water pump (201) and the third water pump (301) is controlled, the second water pump (207) and the fourth water pump (304) are controlled to be closed, the air flow of the fan (105) and the blower (110) is controlled, and the heating power of the heater (204) is controlled to achieve the heating of the cabin by the heat pump and the preheating of the electric drive system and the engine range extender in a low temperature environment, thereby reducing the energy consumption of the thermal management system for heating in a low temperature environment and enabling the power battery, the electric drive system and the engine range extender to operate in a high efficiency range, thereby improving performance and efficiency.

5. The system according to claim 1, characterized in that The control process of low-temperature hybrid heat pump heating and waste heat recovery mode is as follows: The control module (8000) controls the second electronic expansion valve (106), the second port (3032) and the fourth port (3034) of the first four-way valve (303), the first port (2101) of the second three-way valve (210), and the second port (3052) of the third three-way valve (305) to be closed, and controls the first electronic expansion valve (103), the third electronic expansion valve (107), the first port (2021), the second port (2022) and the third port (2023) of the first three-way valve (202), the second port (2102) and the third port (2103) of the second three-way valve (210), and the first port (3051) and the third port (3052) of the third three-way valve (305) to be closed. 3) and the first port (3031) and the third port (3033) of the first four-way valve (303) are opened, the heater (204) is controlled to be closed, the refrigerant flow of the compressor (101) is controlled, the coolant flow of the first water pump (201) and the third water pump (301) is controlled, the second water pump (207) and the fourth water pump (304) are controlled to be closed, and the air flow of the fan (105) and the blower (110) is controlled. This mode utilizes the heat pump to heat the cabin, the power battery, and the electric drive system. At the same time, when the engine range extender is working, it can effectively realize the recovery and utilization of the engine heat, and cool the engine at the same time, greatly reducing the energy consumption of the thermal management system and improving the system efficiency.

6. The system according to claim 1, characterized in that The control process of the low-temperature pure electric heat pump heating mode is as follows: The control module (8000) controls the second electronic expansion valve (106), all ports of the first four-way valve (303), the first port (2101) of the second three-way valve (210), and all ports of the third three-way valve (305) to be closed, controls the first electronic expansion valve (103), the third electronic expansion valve (107), all ports of the first three-way valve (202), and the second port (2102) and the third port (2103) of the second three-way valve (210) to be opened, controls the heater (204) to be closed, controls the refrigerant flow of the compressor (101), controls the coolant flow of the first water pump (201), controls the second water pump (207), the third water pump (301), and the fourth water pump (304) to be closed, and controls the air flow of the fan (105) and the blower (110). This working mode works in a low temperature environment, the engine is not working, and the electric drive system is working. The heat pump is used to heat the cabin, the power battery, and the electric drive system, thereby reducing system energy consumption.

7. The system according to claim 1, characterized in that The control process of high temperature hybrid heat dissipation cooling mode is as follows: The control module (8000) controls the first port (3031) and the second port (3032) of the first four-way valve (303), the third port (2023) of the first three-way valve (202), the third port (2103) of the second three-way valve (210), and the second port (3052) of the third three-way valve (305) to be closed, and controls the first electronic expansion valve (103), the second electronic expansion valve (106), the third electronic expansion valve (107), the first port (2021) and the second port (2022) of the first three-way valve (202), the first port (2101) and the second port (2102) of the second three-way valve (210), and the third three-way valve (305) to be closed. ) The first port (3051) and the third port (3053) and the third port (3033) and the fourth port (3034) of the first four-way valve (303) are opened, the heater (204) is controlled to be closed, the refrigerant flow of the compression mechanism (101) is controlled, the coolant flow of the second water pump (207) and the third water pump (301) is controlled, the first water pump (201) and the fourth water pump (304) are controlled to be closed, and the air flow of the fan (105) is controlled to ensure the heat dissipation of the electric drive system, the power battery and the engine and the comfort of the cabin when the electric drive system and the engine range extender of the hybrid truck work simultaneously in a high temperature environment, thereby ensuring the thermal safety of the vehicle and reducing the energy consumption of the system.

8. The system according to claim 1, characterized in that The control process of the high-temperature pure electric system cooling mode is as follows: The control module (8000) controls the third port (3033) and the fourth port (3034) of the first four-way valve (303), the third port (2023) of the first three-way valve (202), the third port (2103) of the second three-way valve (210), and all ports of the third three-way valve (305) to be closed, and controls the first electronic expansion valve (103), the second electronic expansion valve (106), the third electronic expansion valve (107), the first port (2021) and the second port (2022) of the first three-way valve (202), the first port (2101) and the second port (2102) of the second three-way valve (210), and the first four-way valve (3 03) The first port (3031) and the second port (3032) are opened, the heater (204) is controlled to be closed, the refrigerant flow of the compressor (101) is controlled, the coolant flow of the second water pump (207) and the fourth water pump (304) is controlled, the first water pump (201) and the third water pump (301) are controlled to be closed, and the air flow of the fan (105) is controlled. This working mode is applied to the thermal management mode under the working condition of only the electric drive system in a high temperature environment. This mode ensures the comfort of the cabin under high temperature and the heat dissipation performance of the electric drive system and the power battery, solves the problem of insufficient heat dissipation of the thermal management system under high temperature, and ensures the safety of the thermal management system.

9. The system according to claim 1, characterized in that The fan (105) provides the required air flow for heat exchange between the refrigerant of the first outdoor heat exchanger (104), the coolant of the second outdoor heat exchanger (208) and the coolant of the third outdoor heat exchanger (306) and the air; the blower (110) provides the required air flow for heat exchange between the refrigerant of the evaporator (109) and the coolant of the heater core (209) and the air.

10. A thermal management method for a range-extended hybrid light truck, characterized in that: The method is applied to the thermal management system of the extended-range hybrid light truck according to any one of claims 1 to 9; the method comprises: When the vehicle is identified as hybrid mode and the temperature of the electric drive system, power battery, and engine outlet coolant is low, the low-temperature hybrid preheating mode is activated to transfer heat to the cabin, battery electric drive system, and engine through heat pump heating; When the vehicle is identified as being in hybrid mode and the heat pump efficiency is low, the low-temperature hybrid heat pump heating and waste heat recovery mode is activated to utilize the engine heat and recover the waste heat; When it is identified that the vehicle is in pure electric mode and needs to be heated, the low-temperature pure electric heat pump heating mode is started to heat the system using the heat pump; When the vehicle is identified as being in hybrid mode and the electric drive system, power battery and engine need to be cooled, the high-temperature hybrid heat dissipation cooling mode is activated; When it is identified that the vehicle is in pure electric mode, the coolant temperature at the outlet of the electric drive system is too high, and the air temperature is high and the cabin needs to be cooled, the high-temperature pure electric system cooling and heat dissipation mode is started.

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