Thermal management system and method of fuel cell vehicle and fuel cell vehicle

Abstract

The invention provides a thermal management system and method of a fuel cell vehicle and the fuel cell vehicle, and relates to the technical field of vehicles. The system comprises a first heat exchange loop of a fuel cell engine cooling system, a second heat exchange loop of an electric drive cooling system, a third heat exchange loop of a power cell cooling system, a fourth heat exchange loop of an air conditioning system and a fifth heat exchange loop of a warm air system. The first heat exchange loop exchanges heat with the fifth heat exchange loop through a plate heat exchanger, the second heat exchange loop, the third heat exchange loop and the fifth heat exchange loop are mutually connected through a multi-way valve, the fourth heat exchange loop exchanges heat with the fifth heat exchange loop through a water-cooled condenser, and the fourth heat exchange loop exchanges heat with the third heat exchange loop through a battery cooler; the heat exchange loop and the multi-way valve are both connected with a vehicle controller of the fuel cell vehicle. The heat energy utilization efficiency of the fuel cell vehicle is improved, and the energy consumption of the fuel cell vehicle is reduced to a greater extent.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular, to a thermal management system and method for a fuel cell vehicle and a fuel cell vehicle. Background Art

[0002] Fuel cell vehicles are a new energy vehicle that uses hydrogen and oxygen as reaction materials to provide electricity for the entire vehicle through a series of chemical reactions. At present, the efficiency of fuel cell vehicle engines in converting chemical energy into electrical energy is generally around 40-60%, and most of the remaining energy is discharged into the air in the form of heat energy and is not effectively utilized.

[0003] At present, fuel cell vehicles mostly use PTC heating or heat pump heating to provide thermal energy for the vehicle; some designs use a shared fan for the cooling module of the air conditioner and the fuel engine for integrated heat dissipation; in some vehicles with relatively high integration, the cab air conditioner and power battery cooling systems are designed in parallel to achieve joint cooling; in some energy recovery designs, when the fuel engine is working, the excess heat in the engine circuit is absorbed into the warm air circuit through a heat exchanger to defrost and heat the cab.

[0004] Although the designs of various systems are constantly being optimized and upgraded with technological development, due to the architectural limitations of vehicle transformation from oil to electricity, the architectures of the various thermal management systems in the vehicle are still relatively scattered and independent, with redundant components and low energy efficiency. Summary of the invention

[0005] The purpose of the present application is to provide a thermal management system, method and fuel cell vehicle for a fuel cell vehicle in order to address the deficiencies in the above-mentioned prior art, thereby improving the efficiency of waste heat utilization of the fuel cell vehicle and further reducing the energy consumption of the fuel cell vehicle.

[0006] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0007] In a first aspect, an embodiment of the present application provides a thermal management system for a fuel cell vehicle, the thermal management system comprising: a first heat exchange circuit of a fuel cell engine system, a second heat exchange circuit of an electric drive system, a third heat exchange circuit of a power battery system, a fourth heat exchange circuit of an air conditioning system, and a fifth heat exchange circuit of a heating system;

[0008] The first heat exchange circuit exchanges heat with the fifth heat exchange circuit through a plate heat exchanger, the second heat exchange circuit, the third heat exchange circuit, and the fifth heat exchange circuit are connected to each other through a multi-way valve, the fourth heat exchange circuit exchanges heat with the fifth heat exchange circuit through a water-cooled condenser, and the fourth heat exchange circuit exchanges heat with the third heat exchange circuit through a battery cooler;

[0009] The first heat exchange circuit, the second heat exchange circuit, the third heat exchange circuit, the fourth heat exchange circuit, the fifth heat exchange circuit and the multi-way valve are all connected to a vehicle controller of the fuel cell vehicle.

[0010] Optionally, the first heat exchange loop includes: the fuel cell engine system, a first water pump, a thermostat, a first solenoid valve, a second solenoid valve, a first radiator and a first expansion water tank; wherein the first expansion water tank is connected to the inlet end of the first water pump, the outlet of the first water pump is connected to the inlet of the fuel cell engine system, the outlet of the fuel cell engine system is connected to the inlet of the thermostat, and the large circulation loop between the first outlet of the thermostat and the inlet of the first water pump has a first heat exchange branch and a second heat exchange branch; the first solenoid valve and the second solenoid valve are respectively arranged on the first heat exchange branch and the second heat exchange branch, and the first solenoid valve is also connected to the plate heat exchanger;

[0011] The first radiator is arranged on the large circulation loop after the intersection of the first heat exchange branch and the second heat exchange branch; the second outlet of the thermostat is also connected to the inlet of the first water pump through a small circulation loop;

[0012] The first solenoid valve and the second solenoid valve are connected to the vehicle controller.

[0013] Optionally, the second heat exchange circuit includes: the electric drive system, a second water pump, a second radiator, a first three-way valve, and a second expansion water tank; the second expansion water tank is connected to the inlet of the second water pump, the outlet of the second water pump is connected to the inlet of the electric drive cooling system, the outlet of the electric drive system is connected to the multi-way valve, the multi-way valve is also connected to the first inlet of the first three-way valve, the outlet of the first three-way valve is connected to the inlet of the second water pump, and the second inlet of the first three-way valve is also connected to the outlet of the electric drive system through the second radiator;

[0014] The first three-way valve is connected to the vehicle controller.

[0015] Optionally, the third heat exchange circuit includes: the power battery system, a third water pump and a third expansion water tank; the third expansion water tank is connected to the inlet of the third water pump, the outlet of the third water pump is connected to the heat exchange inlet of the power battery system, the heat exchange outlet of the power battery system is connected to the multi-way valve, the multi-way valve is connected to the second heat exchange port of the fourth heat exchange circuit, and the second heat exchange port of the fourth heat exchange circuit is also connected to the inlet of the third water pump.

[0016] Optionally, the fourth heat exchange circuit includes: an air conditioning system, a water-cooled condenser, a second three-way valve, a first electronic expansion valve, a second electronic expansion valve, a third electronic expansion valve, and a battery cooler; the air conditioning system includes: a compressor, a gas-liquid separator, an outdoor condenser, and an evaporator;

[0017] The inlet of the water-cooled condenser is connected to the gas-liquid separator through the compressor, the outlet of the water-cooled condenser is connected to the first port of the outdoor condenser through the first electronic expansion valve, the outlet of the water-cooled condenser is also connected to the second port of the outdoor condenser through the second three-way valve, the second three-way valve is also connected to the gas-liquid separator, the first port of the outdoor condenser is also connected to the evaporator through the second electronic expansion valve, and the evaporator is also connected to the gas-liquid separator;

[0018] The first port of the outdoor condenser is also connected to the inlet of the battery cooler through the third electronic expansion valve, and the outlet of the battery cooler is also connected to the gas-liquid separator;

[0019] The inlet and outlet of the water-cooled condenser are the first heat exchange port of the fourth heat exchange loop, so as to exchange heat with the fifth heat exchange loop; the inlet and outlet of the battery cooler are the second heat exchange port of the fourth heat exchange loop, so as to exchange heat with the third heat exchange loop;

[0020] The second three-way valve, the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve are all connected to the vehicle controller circuit.

[0021] Optionally, the fifth heat exchange circuit includes: a first warm air circuit and a second warm air circuit, the first warm air circuit includes: a fourth water pump, a third three-way valve, a first warm air core, and a fourth expansion water tank;

[0022] Wherein, the fourth expansion water tank is connected to the inlet end of the fourth water pump, the outlet of the fourth water pump is connected to the first warm air core through the third three-way valve, the first warm air core is also connected to the first heat exchange port of the fourth heat exchange circuit, the first heat exchange port of the fourth heat exchange circuit is also connected to the third three-way valve, the third three-way valve is also connected to the plate heat exchanger through the multi-way valve, and the plate heat exchanger is also connected to the inlet of the fourth water pump;

[0023] The second warm air circuit includes: a fifth water pump, a heater, a second warm air core and a fifth expansion water tank; the fifth expansion water tank is arranged at the inlet of the fifth water pump, the outlet of the fifth water pump is connected to the second warm air core through the heater, and the second warm air core is also connected to the inlet of the fifth water pump.

[0024] Optionally, the multi-way valve is a six-way valve;

[0025] Alternatively, the multi-way valve includes: a first four-way valve and a second four-way valve; the third heat exchange circuit is connected to the fifth heat exchange circuit through the first four-way valve, the second heat exchange circuit is connected to the third heat exchange circuit through the second four-way valve, and the first four-way valve is connected to the second four-way valve.

[0026] In a second aspect, another embodiment of the present application provides a fuel cell vehicle, which includes: the thermal management system of the first aspect mentioned above, and a vehicle controller, wherein the thermal management system is connected to the vehicle controller.

[0027] In a third aspect, another embodiment of the present application provides a thermal management control method, which is applied to a vehicle controller in the thermal management system described in the first aspect, and the method includes:

[0028] Determine the operating conditions of fuel cell vehicles;

[0029] If the operating condition is a power battery preheating condition, the fifth heat exchange circuit in the thermal management system is controlled to be in a first conduction state, the multi-way valve is in a first state, and the first heat exchange circuit in the thermal management system is in a waste heat recovery state, so that the first heat exchange circuit preheats the power battery system in the third heat exchange circuit through the fifth heat exchange circuit;

[0030] If the operating condition is the first heating condition of the cab, the fifth heat exchange circuit is controlled to be in the second conduction state, the multi-way valve is in the second state, and the first heat exchange circuit is in the waste heat recovery state, so that the first heat exchange circuit heats the cab through the fifth heat exchange circuit;

[0031] If the operating condition is the second heating condition of the cab, the fifth heat exchange circuit is controlled to be in the third conduction state, the multi-way valve is in the second state, and the first heat exchange circuit is in the waste heat recovery state, so that the first heat exchange circuit and the fifth heat exchange circuit heat the cab together;

[0032] If the operating condition is the third heating condition of the cab, the fifth heat exchange circuit is controlled to be in the second conduction state, the multi-way valve is in the second state, and the fourth heat exchange circuit is in the heating state, so that only the fourth heat exchange circuit heats the cab through the fifth heat exchange circuit;

[0033] If the operating condition is the first common heating condition, the fifth heat exchange circuit is controlled to be in the second conduction state, the multi-way valve is in the first state, and the first heat exchange circuit is in the waste heat recovery state, so that the first heat exchange circuit heats the cab and the power battery system through the fifth heat exchange circuit;

[0034] If the operating condition is the second common heating condition, the fifth heat exchange circuit is controlled to be in the second conduction state, the multi-way valve is in the first state, and the fourth heat exchange circuit is in the heating state, so that the fourth heat exchange circuit heats the cab and the power battery system through the fifth heat exchange circuit.

[0035] Optionally, the method further comprises:

[0036] If the operating condition is the first heating and cooling condition, the fifth heat exchange circuit is controlled to be in the second conduction state, the multi-way valve is in the second state, the first heat exchange circuit is in the waste heat recovery state, and the fourth heat exchange circuit is in the first cooling state, so that the first heat exchange circuit heats the cab through the fifth heat exchange circuit, and the fourth heat exchange circuit cools the power battery;

[0037] If the operating condition is the second heating and cooling condition, the fifth heat exchange circuit is controlled to be in the second conduction state, the multi-way valve is in the third state, the second heat exchange circuit is in the first conduction state, and the fourth heat exchange circuit is in the heating state, so that the second heat exchange circuit cools the power battery, and the fourth heat exchange circuit heats the cab through the fifth heat exchange circuit;

[0038] If the operating condition is the first common cooling condition, the multi-way valve is controlled to be in the second state and the fourth heat exchange circuit is in the second cooling state, so that the fourth heat exchange circuit cools the power battery and the cab can also be cooled by the air conditioning refrigeration circuit.

[0039] The beneficial effects of this application are:

[0040] The present application provides a thermal management system, method and fuel cell vehicle of a fuel cell vehicle, the thermal management system comprising: a first heat exchange circuit of a fuel cell engine system, a second heat exchange circuit of an electric drive system, a third heat exchange circuit of a power battery system, a fourth heat exchange circuit of an air conditioning system and a fifth heat exchange circuit of a heating system; the first heat exchange circuit exchanges heat with the fifth heat exchange circuit through a plate heat exchanger, the second heat exchange circuit and the third heat exchange circuit are connected to the fifth heat exchange circuit through a multi-way valve, the first heat exchange port of the fourth heat exchange circuit exchanges heat with the fifth heat exchange circuit, and the second heat exchange port of the fourth heat exchange circuit exchanges heat with the third heat exchange circuit; the first heat exchange circuit, the second heat exchange circuit, the third heat exchange circuit, the fourth heat exchange circuit, the fifth heat exchange circuit and the multi-way valve are all connected to a vehicle controller of the fuel cell vehicle. The present application controls the working states of the first heat exchange circuit, the second heat exchange circuit, the third heat exchange circuit, the fourth heat exchange circuit, the fifth heat exchange circuit and the multi-way valve according to the working conditions of the fuel cell vehicle through the vehicle controller, thereby realizing heat exchange between multiple heat exchange circuits, improving the utilization efficiency of waste heat of the fuel cell vehicle, and greatly reducing the energy consumption of the fuel cell vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic diagram of the structure of a thermal management system for a fuel cell vehicle provided in an embodiment of the present application;

[0043] Figure 2 A schematic diagram of the structure of a first heat exchange circuit in a thermal management system provided in an embodiment of the present application;

[0044] Figure 3 A schematic diagram of the structure of a second heat exchange circuit in a thermal management system provided in an embodiment of the present application;

[0045] Figure 4 A schematic diagram of the structure of a third heat exchange circuit in a thermal management system provided in an embodiment of the present application;

[0046] Figure 5 A schematic diagram of the structure of a fourth heat exchange circuit in a thermal management system provided in an embodiment of the present application;

[0047] Figure 6 A schematic diagram of the structure of a fifth heat exchange circuit in a thermal management system provided in an embodiment of the present application;

[0048] Figure 7 A schematic diagram of the structure of a six-way valve in a thermal management system provided in an embodiment of the present application;

[0049] Figure 8 A schematic diagram of the structure of two four-way valves in a thermal management system provided in an embodiment of the present application;

[0050] Fig. 9 A schematic diagram of the structure of a fuel cell vehicle provided in an embodiment of the present application;

[0051] Fig.10 A schematic diagram of the operation of a thermal management system for a power battery preheating condition provided in an embodiment of the present application;

[0052] Fig.11 A schematic diagram of the operation of a thermal management system for a first cab heating condition provided in an embodiment of the present application;

[0053] Fig.12 A schematic diagram of the structure of a thermal management system for a second cab heating condition provided in an embodiment of the present application;

[0054] Fig.13 A schematic diagram of the structure of a thermal management system for a third cab heating condition provided in an embodiment of the present application;

[0055] Fig.14 A schematic diagram of the structure of a thermal management system for a first common heating condition provided in an embodiment of the present application;

[0056] Fig.15 A schematic diagram of the structure of a thermal management system for a second common heating condition provided in an embodiment of the present application;

[0057] Fig.16 A schematic diagram of the structure of a thermal management system for a first heating and cooling condition provided in an embodiment of the present application;

[0058] Fig.17 A schematic diagram of the structure of a thermal management system for a second heating and cooling condition provided in an embodiment of the present application;

[0059] Fig.18 A schematic diagram of the structure of a thermal management system for a first common cooling condition provided in an embodiment of the present application.

[0060] Figure numerals: 100-first heat exchange circuit; 200-second heat exchange circuit; 300-third heat exchange circuit; 400-fourth heat exchange circuit; 500-fifth heat exchange circuit; 501-first warm air circuit; 502-second warm air circuit; 1-first water pump; 2-fuel cell engine system; 3-thermostat; 4-first solenoid valve; 5-second solenoid valve; 6-plate heat exchanger; 7-first radiator; 8-first expansion water tank; 9-second water pump; 10-electric drive system; 11-second radiator; 12-first three-way valve; 13-second expansion water tank; 14-third water pump; 15-power battery system; 16-multi-way valve; 17-electric Pool cooler; 18-third expansion water tank; 19-compressor; 20-water-cooled condenser; 21-first electronic expansion valve; 22-second three-way valve; 23-outdoor condenser; 24-second electronic expansion valve; 25-third electronic expansion valve; 26-evaporator; 27-gas-liquid separator; 28-fourth water pump; 29-third three-way valve; 30-first heater core; 31-fourth expansion water tank; 32-fifth water pump; 33-heater; 34-second heater core; 35-fifth expansion water tank; 16a-six-way valve; 16b-first four-way valve; 16c-second four-way valve; 1000-thermal management system, 2000-vehicle controller. DETAILED DESCRIPTION

[0061] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of explanation and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn in real proportion. The flowchart used in this application shows the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowchart can be implemented out of sequence, and the steps without logical context can be reversed in order or implemented simultaneously. In addition, those skilled in the art can add one or more other operations to the flowchart under the guidance of the content of the present application, or remove one or more operations from the flowchart.

[0062] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0063] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.

[0064] Fuel cell vehicles are a new energy vehicle that uses hydrogen and oxygen as reaction materials to provide electricity to the vehicle through a series of chemical reactions. During the operation of the vehicle, the fuel cell engine can not only directly provide electricity to the vehicle, but also store the excess electricity generated in the power battery. When the vehicle's power demand is large, the power battery and the fuel engine can supply power at the same time to provide sufficient power for the entire vehicle.

[0065] The efficiency of general fuel engines in converting chemical energy into electrical energy is about 40-60%, and the remaining energy is mostly discharged into the air in the form of heat energy, which is not fully utilized. At the same time, fuel cell vehicles currently generally have the problem of insufficient endurance, especially in harsh environments such as high temperature and extreme cold, the energy consumption of the whole vehicle increases, and the cruising range is significantly shortened. In addition, due to the transformation of vehicle development from oil to electricity, the thermal management system of fuel cell vehicles generally has the problem of decentralized and independent architecture due to the limitations of the initial development architecture, making it difficult to work efficiently.

[0066] To this end, the present application provides a thermal management system for a fuel cell vehicle, which includes: a first heat exchange circuit of a fuel cell engine system, a second heat exchange circuit of an electric drive system, a third heat exchange circuit of a power battery system, a fourth heat exchange circuit of an air conditioning system, and a fifth heat exchange circuit of a warm air system. The first heat exchange circuit exchanges heat with the fifth heat exchange circuit through a plate heat exchanger, the second heat exchange circuit and the third heat exchange circuit are connected to the fifth heat exchange circuit through a multi-way valve, the fourth heat exchange circuit exchanges heat with the fifth heat exchange circuit through a water-cooled condenser, the fourth heat exchange circuit exchanges heat with the third heat exchange circuit through a battery cooler, and the first heat exchange circuit, the second heat exchange circuit, the third heat exchange circuit, the fourth heat exchange circuit, the fifth heat exchange circuit and the multi-way valve are all connected to the vehicle controller circuit signal of the fuel cell vehicle. The present application effectively integrates multiple sub-circuits in the thermal management system, and realizes efficient use of the heat of the entire vehicle by controlling multiple sub-circuits, thereby improving the thermal management capability of the fuel cell vehicle and further reducing the energy consumption of the vehicle.

[0067] Figure 1 A schematic diagram of a thermal management system for a fuel cell vehicle provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the thermal management system includes: a first heat exchange loop 100 of the fuel cell engine system, a second heat exchange loop 200 of the electric drive system, a third heat exchange loop 300 of the power battery system, a fourth heat exchange loop 400 of the air conditioning system, and a fifth heat exchange loop 500 of the heating system;

[0068] The first heat exchange loop 100 is connected to the fifth heat exchange loop 500 through the plate heat exchanger 6, the second heat exchange loop 200 and the third heat exchange loop 300 are connected to the fifth heat exchange loop 500 through the multi-way valve 16, the first heat exchange port (not shown in the figure) of the fourth heat exchange loop 400 is connected to the fifth heat exchange loop 500, and the second heat exchange port (not shown in the figure) of the fourth heat exchange loop 400 is connected to the third heat exchange loop 300;

[0069] The first heat exchange loop 100 , the second heat exchange loop 200 , the third heat exchange loop 300 , the fourth heat exchange loop 400 , the fifth heat exchange loop 500 and the multi-way valve 16 are all connected to a vehicle controller circuit of the fuel cell vehicle (not shown in the figure).

[0070] Among them, the first heat exchange loop 100 is a heat exchange loop of the fuel cell engine system, and the plate heat exchanger 6 is used to realize heat exchange between the first heat exchange loop 100 and the fifth heat exchange loop 500. The second heat exchange loop 200 is a heat exchange loop of the electric drive system, which can be connected to the third heat exchange loop 300 and the fifth heat exchange loop 500 through the multi-way valve 16 for heat transfer. The third heat exchange loop 300 is a power battery heat exchange loop, and the heat of the second heat exchange loop 200 and the fifth heat exchange loop 500 can be transferred to the loop through the multi-way valve 16, and the heat of the loop can be transferred to the fourth heat exchange loop through the battery cooler 17. The fourth heat exchange loop 400 is the air conditioning system loop of the fuel cell vehicle, which is used to realize the temperature adjustment of the cab. The heat exchange with the fifth heat exchange loop 500 is realized through the first heat exchange port of the loop, and the heat exchange with the power battery system in the third heat exchange loop 300 is realized through the second heat exchange port. The fifth heat exchange loop 500 is used to absorb and transfer the heat of each subsystem loop, and transfer the heat to the interior of the cab through the warm air duct to provide heating for the driver. The vehicle controller controls the working states of the first heat exchange loop 100, the second heat exchange loop 200, the third heat exchange loop 300, the fourth heat exchange loop 400, the fifth heat exchange loop 500 and the multi-way valve 16 to achieve overall control of the thermal management system, thereby meeting the needs of thermal management working mode conversion under different working conditions and achieving efficient use of the thermal energy of the entire vehicle.

[0071] The present application provides a thermal management system for a fuel cell vehicle, the thermal management system comprising: a first heat exchange circuit of a fuel cell engine system, a second heat exchange circuit of an electric drive system, a third heat exchange circuit of a power battery system, a fourth heat exchange circuit of an air conditioning system, and a fifth heat exchange circuit of a heating system; the first heat exchange circuit exchanges heat with the fifth heat exchange circuit through a plate heat exchanger, the second heat exchange circuit, the third heat exchange circuit, and the fifth heat exchange circuit are interconnected through a multi-way valve, the fourth heat exchange circuit exchanges heat with the fifth heat exchange circuit through a water-cooled condenser, and the fourth heat exchange circuit exchanges heat with the third heat exchange circuit through a battery cooler; the first heat exchange circuit, the second heat exchange circuit, the third heat exchange circuit, the fourth heat exchange circuit, the fifth heat exchange circuit, and the multi-way valve are all connected to a vehicle controller of a fuel cell vehicle. The present application controls the working states of the first heat exchange circuit, the second heat exchange circuit, the third heat exchange circuit, the fourth heat exchange circuit, the fifth heat exchange circuit, and the multi-way valve through the vehicle controller according to the working conditions of the fuel cell vehicle, thereby realizing heat exchange between multiple heat exchange circuits, improving the utilization efficiency of waste heat of the fuel cell vehicle, and greatly reducing the energy consumption of the fuel cell vehicle.

[0072] Based on the above embodiments, the present application further provides a first heat exchange circuit of a thermal management system, Figure 2 A schematic diagram of the structure of a first heat exchange circuit in a thermal management system provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the first heat exchange circuit 100 includes: a fuel cell engine system 2, a first water pump 1, a thermostat 3, a first solenoid valve 4, a second solenoid valve 5, a first radiator 7 and a first expansion water tank 8; wherein the first expansion water tank 8 is connected to the inlet end of the first water pump 1, the outlet end of the first water pump 1 is connected to the inlet of the fuel cell engine system 2, the outlet of the fuel cell engine system 2 is connected to the inlet of the thermostat 3, and the large circulation circuit between the second outlet 3-2 of the thermostat and the inlet of the first water pump 1 has a first heat exchange branch and a second heat exchange branch; the first solenoid valve 4 and the second solenoid valve 5 are respectively arranged on the first heat exchange branch and the second heat exchange branch, and the first solenoid valve 4 is also connected to the plate heat exchanger 6;

[0073] The first radiator 7 is arranged on the large circulation loop after the first heat exchange branch and the second heat exchange branch intersect; the first outlet 3-1 of the thermostat 3 is also connected to the inlet of the first water pump 1 through a small circulation loop;

[0074] The first solenoid valve 4 and the second solenoid valve 5 are connected to a vehicle controller (not shown).

[0075] Among them, the first expansion water tank 8 is used to store coolant and adjust the pressure for the circuit. The coolant can be a coolant with a ratio of 50% water and ethylene glycol or other types of liquids, and the embodiment of the present application does not limit this. The first water pump 1 is used to provide pump pressure for the circuit. The thermostat 3 is used to adjust and control the temperature of the coolant at both ends of the engine inlet and outlet. The first solenoid valve 4 and the second solenoid valve 5 control the flow rate of the coolant in the first heat exchange branch and the second heat exchange branch respectively. The first radiator 7 is used to dissipate heat and cool the coolant in the first heat exchange circuit 100.

[0076] Optionally, after the fuel cell engine system 2 is started, the first water pump 1 is turned on. When the engine heating power is low, the coolant passes through the fuel cell engine system 2 and then flows through the small circulation loop through the thermostat 3 for self-circulation cooling. When the engine heating power is high, the coolant passes through the fuel cell engine system 2 and then flows through the large circulation loop and the small circulation loop through the thermostat 3 respectively. According to the size of the system heat exchange demand, the first solenoid valve 4 and the second solenoid valve 5 in the large circulation loop are adjusted to control the flow ratio of the two branches; when the warm air circuit has a low demand for heat utilization of the fuel engine system circuit, the opening of the first solenoid valve 4 can be reduced, and the opening of the second solenoid valve 5 can be increased, and the power of the first radiator can be increased; when the demand for waste heat utilization is high, the opening of the first solenoid valve 4 is increased, and the opening of the second solenoid valve 5 is reduced, and the heat dissipation power of the first radiator is reduced.

[0077] In the embodiment of the present application, the first solenoid valve and the second solenoid valve are controlled by the vehicle controller to regulate the heat exchange state of the first heat exchange circuit. This can effectively dissipate the heat of the system components in the first heat exchange circuit while protecting the heating system from excessively high heat exchange temperature that would cause damage to the system and other systems, thereby increasing the overall life of the thermal management system.

[0078] Based on the above embodiments, the present application also provides a second heat exchange circuit in a thermal management system. Figure 3 A schematic diagram of the structure of a second heat exchange circuit in a thermal management system provided in an embodiment of the present application, such as Figure 3 As shown, the second heat exchange circuit 200 includes: an electric drive system 10, a second water pump 9, a second radiator 11, a first three-way valve 12, and a second expansion water tank 13; the second expansion water tank 13 is arranged at the inlet of the second water pump 9, the outlet of the second water pump 9 is connected to the heat exchange inlet of the electric drive system 10, the heat exchange outlet of the electric drive system 10 is connected to the multi-way valve 16, the multi-way valve 16 is also connected to the first inlet 12-2 of the first three-way valve 12, the outlet 12-1 of the first three-way valve is connected to the inlet of the second water pump 9, and the second inlet 12-3 of the first three-way valve is also connected to the heat exchange outlet of the electric drive system 10 through the second radiator 11;

[0079] The first three-way valve is connected to a vehicle controller (not shown).

[0080] Among them, the electric drive system 10 is used to convert electrical energy into mechanical energy to provide power for the vehicle. During the operation of the electric drive system 10, there is energy loss and heat is generated when the electrical energy is converted into mechanical energy. The second expansion water tank 13 is used to store and replenish the coolant to maintain the pressure balance of the cooling system circuit. The coolant can be a solution of 50% water and ethylene glycol or other liquids, which is not limited in this embodiment of the present application. The second water pump 9 is used to provide pump pressure for the system. The second radiator 11 is used to dissipate heat for the coolant in the second heat exchange circuit 200. The first three-way valve 12 is used to connect and switch multiple passages in the second heat exchange circuit 200.

[0081] Optionally, when the electric drive system 10 generates heat, the second water pump 9 is turned on to provide pump pressure for the system, and the coolant flows from the outlet of the second water pump 9 to the inlet of the electric drive system 10, exchanges heat in the water jacket of the electric drive system 10 and flows from the outlet to the multi-way valve 16, and then flows to the first inlet 12-2 of the first three-way valve 12 through the multi-way valve 16, and is connected to the inlet of the second water pump 9 through the outlet 12-1 of the first three-way valve, thereby realizing the circulation of the coolant.

[0082] Optionally, the second inlet 12 - 3 of the first three-way valve is also connected to the heat exchange outlet of the electric drive system 10 through the second radiator 11 , and the second heat exchange circuit 200 is cooled by the second radiator 11 .

[0083] In the embodiment of the present application, the vehicle controller performs thermal management on the electric drive system by controlling the multi-way valve and the first three-way valve to ensure the normal operation of the electric drive system. The second heat exchange circuit is connected to the third heat exchange circuit and the fifth heat exchange circuit through the multi-way valve, and the connection relationship is switched, thereby increasing the diversity of heat exchange and cooling modes of the thermal management system and improving the thermal management efficiency.

[0084] Based on the above embodiments, the present application also provides a third heat exchange circuit of a thermal management system. Figure 4 A schematic diagram of the structure of a third heat exchange circuit in a thermal management system provided in an embodiment of the present application, such as Figure 4 As shown, the third heat exchange circuit 300 includes: a power battery system 15, a third water pump 14 and a third expansion water tank 18; the third expansion water tank 18 is arranged at the inlet of the third water pump 14, the outlet of the third water pump 14 is connected to the inlet of the power battery system 15, the heat exchange outlet of the power battery system 15 is connected to the multi-way valve 16, the multi-way valve 16 is connected to the second heat exchange port of the fourth heat exchange circuit, and the second heat exchange port of the fourth heat exchange circuit is also connected to the inlet of the third water pump 14.

[0085] Among them, the power battery system 15 is used to assist the fuel engine in supplying power to the vehicle's electrical equipment, generating heat loss during operation. The third expansion water tank 18 is used to store coolant and control the loop pressure. The coolant can be a 50% ethylene glycol coolant or other types of liquids, which are not limited in this embodiment of the present application. The third water pump 14 is used to provide driving pump pressure for the loop liquid, and the battery cooler 17 is used to realize heat exchange between the third heat exchange loop 300 and the fourth heat exchange loop.

[0086] Optionally, when the temperature of the power battery system 15 circuit is too high, the third water pump 14 starts working to deliver pump pressure to the circuit, and the coolant flows through the interior of the power battery system 15 to dissipate heat and cool it, and flows from the outlet of the power battery system 15 to the multi-way valve 16, and the multi-way valve 16 is connected to the battery cooler 17, and the battery cooler 17 is also connected to the inlet of the third water pump 14.

[0087] In the embodiment of the present application, the heat in the third heat exchange loop 300 is transferred to the fourth heat exchange loop 400 through evaporation and heat absorption by the battery cooler 17, so as to cool the third heat exchange loop and ensure the normal operating temperature of the battery system loop.

[0088] Based on the above embodiments, the present application further provides a fourth heat exchange loop in a thermal management system. Figure 5 A schematic diagram of the structure of a fourth heat exchange circuit in a thermal management system provided in an embodiment of the present application, such as Figure 5 As shown, the fourth heat exchange circuit 400 includes: an air conditioning system, a water-cooled condenser 20, a second three-way valve 22, a first electronic expansion valve 21, a second electronic expansion valve 24, a third electronic expansion valve 25, and a battery cooler 17; the air conditioning system includes: a compressor 19, a gas-liquid separator 27, an outdoor condenser 23 and an evaporator 26;

[0089] The inlet of the water-cooled condenser 20 is connected to the gas-liquid separator 27 through the compressor 19, the outlet of the water-cooled condenser 20 is connected to the first port of the outdoor condenser 23 through the first electronic expansion valve 21, the outlet of the water-cooled condenser 20 is also connected to the second port of the outdoor condenser 23 through the second three-way valve 22, the second three-way valve 22 is also connected to the gas-liquid separator 27, the first port of the outdoor condenser 23 is also connected to the evaporator 26 through the second electronic expansion valve 24, and the evaporator 26 is also connected to the gas-liquid separator 27;

[0090] The first port of the outdoor condenser 23 is also connected to the inlet of the battery cooler 17 through the third electronic expansion valve 25, and the outlet of the battery cooler 17 is connected to the gas-liquid separator 27;

[0091] The water inlet and outlet of the water-cooled condenser 20 is the first heat exchange port of the fourth heat exchange loop 400, connected to the fifth heat exchange loop 500, and the water inlet and outlet of the battery cooler 17 is the second heat exchange port of the fourth heat exchange loop 400, connected to the third heat exchange loop;

[0092] The second three-way valve 22, the first electronic expansion valve 21, the second electronic expansion valve 24, and the third electronic expansion valve 25 are all controlled by the vehicle controller (not shown in the figure). Specifically, the first electronic expansion valve 21, the second electronic expansion valve 24, and the third electronic expansion valve 25 all have corresponding controllers, which are connected to the vehicle controller through the controllers. After receiving the feedback information of multiple sensors corresponding to the first electronic expansion valve 21, the second electronic expansion valve 24, and the third electronic expansion valve 25, the vehicle controller sends control information to the first electronic expansion valve 21, the second electronic expansion valve 24, and the third electronic expansion valve 25 after processing and analysis.

[0093] Among them, the water-cooled condenser 20 is used to realize the heat exchange between the fourth heat exchange loop 400 and the fifth heat exchange loop, and the first electronic expansion valve 21, the second electronic expansion valve 24 and the third electronic expansion valve 25 are used to throttle the evaporation of the refrigerant. The battery cooler 17 is used to cool the power battery system 15 and maintain the normal operating temperature of the power battery system. The compressor 19 provides pump pressure for the delivery of the refrigerant by compressing the gas to do work. The gas-liquid separator 27 is used to separate the remaining liquid in the fourth heat exchange loop 400. When the system is cooling, the outdoor condenser 23 can condense and dissipate the refrigerant in the system loop. When the system is heating, the refrigerant absorbs the heat of the external environment by evaporation at the outdoor condenser 23, and transfers the heat to the inside of the air conditioning system loop. The evaporator 26 is used to realize the evaporation heat absorption of the refrigerant at this location, and absorbs the heat in the air into the refrigerant to heat the system.

[0094] Optionally, when the fourth heat exchange circuit 400 is in the cooling mode, since the temperature of the fifth heat exchange circuit is too high, the compressor 19 performs work, and the gaseous refrigerant cannot effectively exchange heat after passing through the water-cooled condenser 20, and it is still a high-temperature and high-pressure gas after coming out. It then passes through the second three-way valve to the outdoor condenser 23 for condensation and heat dissipation. The condensed refrigerant then evaporates and absorbs heat through the second electronic expansion valve 24 and the evaporator 26 to cool the air in the cab refrigeration duct. The evaporated refrigerant is filtered at the gas-liquid separator, and then returns to the compressor for the next cycle of work.

[0095] When the fourth heat exchange circuit 400 is in the heating mode, the compressor 19 works on the refrigerant, compressing it into a high-temperature and high-pressure gas. The gas exchanges heat with the fifth heat exchange circuit when flowing through the water-cooled condenser 20. The refrigerant after the heat exchange is condensed into a liquid state, and evaporates and absorbs external heat under the action of the first electronic expansion valve 21 and the outdoor condenser 23. The refrigerant is converted back into a gas state and returns to the gas-liquid separator 27 through the second three-way valve 22 to filter the remaining liquid, and then passes through the compressor for the next heating cycle.

[0096] Optionally, the first port of the outdoor condenser 23 is also connected to the inlet of the battery cooler 17 through the third electronic expansion valve 25, and the outlet of the battery cooler 17 is also connected to the gas-liquid separator 27, and heat is exchanged with the third heat exchange circuit 300 through the battery cooler 17 to keep the power battery system operating at normal temperature.

[0097] In an embodiment of the present application, a water-cooled condenser and a battery cooler are arranged in the fourth heat exchange circuit to simultaneously exchange heat with the third heat exchange circuit and the fifth heat exchange circuit, so that the waste heat of the fourth heat exchange circuit and the third heat exchange circuit can be utilized by the fifth warm air circuit, thereby improving the waste heat utilization efficiency of the heat exchange circuit.

[0098] Based on the above embodiments, the present application also provides a fifth heat exchange loop in a thermal management system. Figure 6 A schematic diagram of the structure of the fifth heat exchange circuit in a thermal management system provided in an embodiment of the present application is shown in FIG. Figure 6 As shown, the fifth heat exchange circuit 500 includes: a first warm air circuit 501 and a second warm air circuit 502, and the first warm air circuit 501 includes: a fourth water pump 28, a third three-way valve 29, a first warm air core 30, and a fourth expansion water tank 31;

[0099] The fourth expansion water tank 31 is arranged at the inlet end of the fourth water pump 28, the outlet of the fourth water pump 28 is connected to the first outlet 29-2 of the third three-way valve 29, the second outlet 29-2 is connected to the first warm air core 30, the first warm air core 30 is also connected to the water-cooled condenser 20, the water-cooled condenser 20 is also connected to the second outlet 29-3 of the third three-way valve 29, the second outlet 29-3 of the third three-way valve 29 and the outlet of the water-cooled condenser 20 are also connected to the plate heat exchanger 6 through the multi-way valve 16, and the plate heat exchanger 6 is also connected to the fourth water pump 28;

[0100] The second warm air circuit 502 includes: a fifth water pump 32, a heater 33, a second warm air core 34 and a fifth expansion water tank 35; the fifth expansion water tank 35 is arranged at the inlet of the fifth water pump 32, and the outlet of the fifth water pump 32 is connected to the second warm air core 34 through the heater 33, and the second warm air core 34 is also connected to the inlet of the fifth water pump 32.

[0101] The first heater core 30 is connected to the heater channel of the fuel cell vehicle and is used to heat the cab of the fuel cell vehicle. The fourth expansion water tank 31 is used to store coolant and regulate the system pressure. The coolant can be a 50% ethylene glycol coolant or other types of liquids, which are not limited in this embodiment of the present application. The fourth water pump 28 is used to provide pump pressure to the system.

[0102] Optionally, the outlet of the fourth water pump 28 is connected to the first warm air core 30 through the third three-way valve 29, and the first warm air core 30 is also connected to the water-cooled condenser 20. The water-cooled condenser 20 realizes the heat exchange between the fourth heat exchange circuit 400 and the fifth heat exchange circuit 500. The water-cooled condenser 20 is also connected to the second outlet 29-3 of the third three-way valve 29. The outlet 29-3 and the outlet of the water-cooled condenser 20 are also connected to the plate heat exchanger 6 through the multi-way valve 16. The plate heat exchanger 6 is also connected to the fourth water pump 28, and the circulation and heat exchange of the coolant in the second heat exchange circuit 200 and the third heat exchange circuit 300 are realized through the multi-way valve 16, and heat exchange with the first heat exchange circuit 100 can be achieved through the plate heat exchanger 6.

[0103] The second heating core 34 is connected to the heating channel of the fuel cell vehicle and is used to heat the cab of the fuel cell vehicle. The fifth expansion tank 35 is used to store coolant and regulate the system pressure. The coolant can be a 50% ethylene glycol coolant or other types of liquids, which are not limited in this embodiment of the present application. The fifth water pump 32 is used to provide pump pressure to the second heating loop 502 system.

[0104] Optionally, the fifth water pump 32 is a coolant delivery pump in the second warm air circuit 502, connected to the second warm air core 34 through the heater 33, and the second warm air core 34 is also connected to the inlet of the fifth water pump 32 to exchange heat from the heater 33 to the warm air channel of the fuel cell vehicle.

[0105] In the embodiment of the present application, the heat of the first heat exchange circuit and the fourth heat exchange circuit is exchanged to the warm air channel of the fuel cell vehicle through the first warm air circuit to heat the cab. When the waste heat of the first heat exchange circuit and the fourth heat exchange circuit cannot heat the cab, the cab is heated by the fourth heat exchange circuit, thereby ensuring the heating demand of the cab and improving the heat utilization efficiency of the heat management system.

[0106] Based on the above embodiment, the multi-way valve in this application is a six-way valve. Figure 7 A schematic diagram of the structure of a six-way valve in a thermal management system provided in an embodiment of the present application is shown in FIG. Figure 1-Figure 7As shown, when the multi-way valve 16 is a six-way valve 16a, the first end 16a-1 of the six-way valve 16a is connected to the outlet 20-3 of the water-cooled condenser 20, the second end 16a-2 of the six-way valve 16a is connected to the plate heat exchanger 6, the third end 16a-3 of the six-way valve 16a is connected to the first inlet 12-2 of the first three-way valve, the fourth end 16a-4 of the six-way valve 16a is connected to the outlet end of the electric drive system 10, the fifth end 16a-5 of the six-way valve 16a is connected to the inlet end of the power battery system 15, and the sixth end 16a-6 of the six-way valve 16a is connected to the battery cooler inlet 17-1.

[0107] On the basis of the above embodiment, the multi-way valve in the present application is a first four-way valve and a second four-way valve. Figure 8 A schematic diagram of the structure of two four-way valves in a thermal management system provided in an embodiment of the present application, such as Figure 1-Figure 6 as well as Figure 8 As shown, the first end 16b-1 of the first four-way valve 16b is connected to the first inlet 12-2 of the first three-way valve 12, the second end 16b-2 of the first four-way valve 16b is connected to the outlet of the electric drive system 10, the third end 16b-3 of the first four-way valve 16b is connected to the inlet of the power battery system 15, the fourth end 16b-4 of the first four-way valve 16b is connected to the second end 16c-2 of the second four-way valve 16c, the first end 16c-1 of the second four-way valve 16c is connected to the outlet 20-3 of the water-cooled condenser 20, the third end 16c-3 of the second four-way valve 16c is connected to the plate heat exchanger 6, and the fourth end 16c-4 of the second four-way valve 16c is connected to the inlet 17-1 of the battery cooler 17.

[0108] In the embodiment of the present application, the thermal management system is controlled by a six-way valve or two four-way valves. When the operating conditions are different, different heat exchange circuits and working modes are switched to perform heat exchange, thereby improving the heat exchange efficiency of the thermal management system and ensuring efficient use of thermal energy.

[0109] Based on the above embodiments, the present application also provides a fuel cell vehicle. Fig. 9 A schematic diagram of a fuel cell vehicle provided in an embodiment of the present application is shown in FIG. Fig. 9 As shown, the fuel cell vehicle includes: a thermal management system 1000 , a vehicle controller 2000 , and the thermal management system 1000 is connected to the vehicle controller 2000 .

[0110] Based on the above embodiments, the present application further provides a thermal management control method, which is applied to a vehicle controller in the above thermal management system, and the method includes:

[0111] Determine the operating conditions of the fuel cell vehicle.

[0112] If the operating condition is a power battery preheating condition, the fifth heat exchange circuit in the thermal management system is controlled to be in the first conduction state, the multi-way valve is in the first state, and the first heat exchange circuit in the thermal management system is in a waste heat recovery state, so that the first heat exchange circuit preheats the power battery system in the third heat exchange circuit through the fifth heat exchange circuit.

[0113] Fig.10 A schematic diagram of the structure of the thermal management system for the power battery preheating condition provided in the embodiment of the present application, as shown in FIG. Fig.10 as well as Figure 1-Figure 6 As shown, the multi-way valve in the figure takes a six-way valve as an example, and other multi-way valves can be used in specific use, and the embodiment of the present application does not limit this. The fifth heat exchange circuit 500 is in the first conduction state, that is, the plate heat exchanger 6 of the first heat exchange circuit 100 is connected to the fourth water pump 28, the fourth expansion water tank 31 is arranged at the inlet of the fourth water pump 28, the fourth water pump 28 is connected to the multi-way valve 16 through the inlet 29-1 and the second outlet 29-3 of the third three-way valve 29, and is connected to the third heat exchange circuit 300 through the multi-way valve 16. The multi-way valve 16 is in the first state, that is, the first end 16a-1 of the multi-way valve 16 is connected to the sixth end 16a-6, the fifth end 16a-5 of the multi-way valve 16 is connected to the second end 16a-2, and the third end 16a-3 of the multi-way valve 16 is connected to the fourth end 16a-4. The first heat exchange loop 100 in the thermal management system is in a waste heat recovery state, that is, the first solenoid valve 4 is opened, and waste heat is recovered from the first heat exchange loop 100.

[0114] Optionally, when the working condition is the power battery preheating condition, the first heat exchange loop 100 controls the first solenoid valve 4 and the second solenoid valve 5 through the vehicle controller to achieve thermal management of the first heat exchange loop 100. When the ambient temperature is too low and the flow rate of the first heat exchange branch of the fuel cell engine system is small, the second solenoid valve 5 is controlled to reduce its opening and the first solenoid valve 4 is controlled to increase its opening. At this time, before the coolant in the first heat exchange loop enters the first radiator 7, the heat of the heat exchange branch of the engine system is converted to the fifth heat exchange loop through the plate heat exchanger 6, and then merged with the second heat exchange branch to dissipate heat to the radiator. At the same time, the heat exchange amount is controlled by controlling the opening of the first solenoid valve 4 and the second solenoid valve 5 to avoid excessively high temperature of the coolant in the first heat exchange loop 100, which may cause damage to the power battery system.

[0115] If the operating condition is the first cab heating condition, the fifth heat exchange circuit is controlled to be in the second conduction state, the multi-way valve is in the second state, and the first heat exchange circuit is in the waste heat recovery state.

[0116] Fig.11 The schematic diagram of the operation of the thermal management system for the first cab heating condition provided in the embodiment of the present application is as follows: Fig.11 as well as Figure 1-Figure 6As shown, the multi-way valve in the figure takes a six-way valve as an example, and can be other multi-way valves when used specifically, and the embodiment of the present application does not limit this. The fifth heat exchange circuit 500 is in the second conduction state, that is, the first heat exchange circuit 100 plate heat exchanger 6 is connected to the fourth water pump 28, the fourth expansion water tank 31 is arranged at the inlet of the fourth water pump 28, and the fourth water pump 28 is connected to the first warm air core 30 through the inlet 29-1 and the first outlet 29-2 of the third three-way valve 29. At this time, the first warm air core 30 works for heating the cab. The first warm air core 30 is also connected to the water-cooled condenser 20, and the water-cooled condenser 20 is connected to the plate heat exchanger 6 through the multi-way valve 16. The second conduction state of the multi-way valve 16 is that the first end 16-1 is connected to the second end 16-2, the fifth end 16-5 is connected to the sixth end 16-6, and the third end 15-4 is connected to the fourth end 16-4.

[0117] Optionally, when the working condition is the first cab heating working condition, the solid line in the figure is the heat exchange route. The inlet 29-1 and the first outlet 29-2 of the third three-way valve 29 are controlled to be connected, the first solenoid valve 4 and the second solenoid valve 5 are opened, the first end 16-1 and the second end 16-2 of the multi-way valve 16 are connected, the first water pump 1 and the fourth water pump 28 are turned on, and the other switches and devices are set to default. The first heat exchange loop 100 and the fifth heat exchange loop are exchanged with each other through the plate heat exchanger 6, and the cab is heated through the fifth heat exchange loop 500.

[0118] If the operating condition is the second cab heating condition, the fifth heat exchange circuit is controlled to be in the third conduction state, the multi-way valve is in the second state, and the first heat exchange circuit is in the waste heat recovery state, so that the first heat exchange circuit and the fifth heat exchange circuit jointly heat the cab.

[0119] Fig.12 A schematic diagram of the structure of a thermal management system for a second cab heating condition provided in an embodiment of the present application, such as Fig.12 as well as Figure 1-Figure 6 As shown, the multi-way valve in the figure takes a six-way valve as an example, and other multi-way valves can be used in specific use, and the embodiment of the present application does not limit this. The state of the multi-way valve 16 and the first heat exchange circuit 100 is the same as above. The plate heat exchanger 6 of the first heat exchange circuit 100 in the fifth heat exchange circuit is connected to the fourth water pump 28, and the fourth expansion water tank 31 is arranged at the inlet of the fourth water pump 28. The fourth water pump 28 is connected to the first warm air core 30 through the inlet 29-1 of the third three-way valve 29 and the first outlet 29-2. At this time, the first warm air core 30 works for heating the cab. The first warm air core 30 is also connected to the water-cooled condenser 20. The other end of the water-cooled condenser 20 is connected to the plate heat exchanger 6 through the multi-way valve 16. The heater 33 is turned on to control the fifth heat exchange circuit 500 to be in the third conduction state. The heater 33 can be a PTC heater.

[0120] Optionally, when the heat exchange temperature of the first heat exchange circuit 100 in the above-mentioned first cab heating condition is lower than 70°C, it is also necessary to turn on the heater 33 and the fourth water pump 28, and use the heater 33 for auxiliary heating, so that when the cold air in the cab passes through the air duct, it first passes through the first warm air core 30 for primary heating to become medium-temperature gas, and then passes through the second warm air core 34 for secondary heating, thereby meeting the heating request of the cab. At the same time, the PTC secondary heating improves the temperature control accuracy and increases the indoor comfort.

[0121] If the operating condition is the third cab heating condition, the fifth heat exchange circuit is controlled to be in the second conduction state, the multi-way valve is in the second state, and the waste heat recovery of the first heat exchange circuit is closed, and the fourth heat exchange circuit is in the heating state, so that only the fourth heat exchange circuit heats the cab through the fifth heat exchange circuit.

[0122] Fig.13 A schematic diagram of the structure of a thermal management system for a third cab heating condition provided in an embodiment of the present application, such as Fig.13 as well as Figure 1-Figure 6 As shown, the multi-way valve in the figure takes a six-way valve as an example, and can be other multi-way valves when used specifically, and the embodiment of the present application does not limit this. The fifth heat exchange circuit 500 is in the second conduction state, that is, the first heat exchange circuit 100 plate heat exchanger 6 is connected to the fourth water pump 28, the fourth expansion water tank 31 is arranged at the inlet of the fourth water pump 28, and the fourth water pump 28 is connected to the first warm air core 30 through the inlet 29-1 and the first outlet 29-2 of the third three-way valve 29. At this time, the first warm air core 30 works for heating the cab. The first warm air core 30 is also connected to the inlet of the water-cooled condenser 20, and the outlet of the water-cooled condenser 20 is connected to the plate heat exchanger 6 through the multi-way valve 16. The second conduction state of the multi-way valve 16 is that the first end 16a-1 is connected to the second end 16a-2, the fifth end 16a-5 is connected to the sixth end 16a-6, and the third end 16a-3 is connected to the fourth end 16a-4. The fourth heat exchange circuit 400 is in a heating state, that is, the inlet of the water-cooled condenser 20 is connected to the gas-liquid separator 27 through the compressor 19, the outlet of the water-cooled condenser 20 is connected to the first port of the outdoor condenser 23 through the first electronic expansion valve 21, and the second port of the outdoor condenser 23 is connected to the gas-liquid separator 27 through the first outlet 22-2 and the second outlet 22-3 of the second three-way valve 22.

[0123] Optionally, if the operating condition is the third cab heating condition, the solid line in the figure is the heat exchange route. Then the first end 16a-1 and the second end 16a-2 of the six-way valve 16a are controlled to be connected, the inlet 29-1 and the first outlet 29-2 of the third three-way valve 29 are connected, the first outlet 22-2 and the second outlet 22-3 of the second three-way valve 22 are connected, the first electronic expansion valve 21 is opened, and the first solenoid valve 4 is closed. At this time, the working state of the remaining circuit components does not affect the heating and is set to default. At this time, the heat is transferred to the fifth heat exchange circuit 500 through the fourth heat exchange circuit 400 to heat the cab.

[0124] If the operating condition is the first common heating condition, the fifth heat exchange circuit is controlled to be in the second conduction state, the multi-way valve is in the first state, and the first heat exchange circuit is in the waste heat recovery state, so that the first heat exchange circuit heats the cab and the power battery system through the fifth heat exchange circuit.

[0125] Fig.14 A schematic diagram of the structure of a thermal management system for a first common heating condition provided in an embodiment of the present application, such as Fig.14 as well as Figure 1-Figure 6 As shown, the multi-way valve in the figure takes a six-way valve as an example, and can be other multi-way valves when used specifically, and the embodiment of the present application does not limit this. The fifth heat exchange circuit 500 is in the second conduction state, that is, the plate heat exchanger 6 of the first heat exchange circuit 100 is connected to the fourth water pump 28, and the fourth expansion water tank 31 is arranged at the inlet of the fourth water pump 28. The fourth water pump 28 is connected to the first warm air core 30 through the inlet 29-1 of the third three-way valve 29 and the first outlet 29-2. At this time, the first warm air core 30 works for heating the cab. The first warm air core 30 is also connected to the inlet of the water-cooled condenser 20, and the outlet of the water-cooled condenser 20 is connected to the plate heat exchanger 6 through the six-way valve 16a. The six-way valve 16a is in the first state, that is, the first end 16a-1 and the sixth end 16a-6 of the six-way valve 16a are connected, the fifth end 16a-5 and the second end 16a-2 of the six-way valve 16a are connected, and the third end 16a-3 and the fourth end 16a-4 of the six-way valve 16a are connected. The first heat exchange loop 100 is in the waste heat recovery state, that is, the first solenoid valve 4 is turned on, the first water pump 1 is started, and the waste heat of the first heat exchange loop 100 is recovered.

[0126] Optionally, the operating condition is the first common heating condition, and the solid line in the figure is the heat exchange route. Then the first end 16a-1 and the sixth end 16a-6 of the six-way valve 16a are controlled to be connected, the fifth end 16a-5 and the second end 16a-2 of the six-way valve 16a are controlled to be connected, the inlet 29-1 and the first outlet 29-2 of the third three-way valve 29 are controlled to be connected, the first solenoid valve 4 is opened, the first water pump 1 is started, and the fourth heat exchange circuit 400 is closed, so that the first heat exchange circuit 100 heats the cab and the power battery system 15 by transferring heat to the fifth heat exchange circuit 500.

[0127] If the operating condition is the second common heating condition, the fifth heat exchange circuit is controlled to be in the second conduction state, the multi-way valve is in the first state, and the fourth heat exchange circuit is in the heating state, so that the fourth heat exchange circuit transfers heat through the fifth heat exchange circuit to heat the cab and the power battery system.

[0128] Fig.15 A schematic diagram of the structure of a thermal management system for a second common heating condition provided in an embodiment of the present application, such as Fig.15 as well as Figure 1-Figure 6 As shown, the multi-way valve in the figure takes a six-way valve as an example, and can be other multi-way valves when used specifically, and the embodiment of the present application does not limit this. The fifth heat exchange circuit 500 is in the second conduction state, that is, the first heat exchange circuit 100. The plate heat exchanger 6 is connected to the fourth water pump 28, and the fourth expansion water tank 31 is arranged at the inlet of the fourth water pump 28. The fourth water pump 28 is connected to the first warm air core 30 through the inlet 29-1 of the third three-way valve 29 and the first outlet 29-2. At this time, the first warm air core 30 works for heating the cab. The first warm air core 30 is also connected to the inlet of the water-cooled condenser 20, and the outlet of the water-cooled condenser 20 is connected to the plate heat exchanger 6 through the six-way valve 16a. The six-way valve 16a is in the first state, that is, the first end 16a-1 and the sixth end 16a-6 of the six-way valve 16a are connected, the fifth end 16a-5 and the second end 16a-2 of the six-way valve 16a are connected, and the third end 16a-3 and the fourth end 16a-4 of the six-way valve 16a are connected. The fourth heat exchange loop 400 is in the heating state, that is, the inlet of the water-cooled condenser 20 is connected to the gas-liquid separator 27 through the compressor 19, the outlet of the water-cooled condenser 20 is connected to the first port of the outdoor condenser 23 through the first electronic expansion valve 21, and the second port of the outdoor condenser 23 is connected to the gas-liquid separator 27 through the first outlet 22-2 and the second outlet 22-3 of the second three-way valve 22.

[0129] Optionally, if the operating condition is the second common heating condition, the solid line in the figure is the heat exchange route. Then the first end 16a-1 and the sixth end 16a-6 of the six-way valve 16a are controlled to be turned on, the fifth end 16a-5 and the second end 16a-2 of the six-way valve 16a are turned on, the inlet 29-1 and the first outlet 29-2 of the third three-way valve 29 are turned on, the second end 22-2 and the third end 22-3 of the second three-way valve 22 are turned on, the first end 22-1 is closed, the first electronic expansion valve 21 is opened, and the first solenoid valve 4 is closed. At this time, the fourth heat exchange circuit 400 heats the cab and the power battery system 15 by providing heat energy to the fifth heat exchange circuit 500.

[0130] Based on the above embodiment, the present application also provides another thermal management control method, which further includes:

[0131] If the operating condition is the first heating and cooling condition, the fifth heat exchange circuit is controlled to be in the second conduction state, the multi-way valve is in the second state, the first heat exchange circuit is in the waste heat recovery state, and the fourth heat exchange circuit is in the first cooling state, so that the first heat exchange circuit heats the cab by transferring heat to the fifth heat exchange circuit, and the fourth heat exchange circuit cools the power battery.

[0132] Fig.16 A schematic diagram of the structure of a thermal management system for a first heating and cooling condition provided in an embodiment of the present application, such as Fig.16 as well as Figure 1-Figure 6 As shown, the multi-way valve in the figure takes a six-way valve as an example, and other multi-way valves can be used in specific use, and the embodiment of the present application does not limit this. The fifth heat exchange circuit 500 is in the second conduction state, that is, the plate heat exchanger 6 is connected to the fourth water pump 28 and the fourth expansion water tank 31, the fourth water pump 28 is connected to the first warm air core 30 through the inlet 29-1 and the first outlet 29-2 of the third three-way valve 29, the first warm air core 30 is connected to the inlet of the water-cooled condenser 20, and the outlet of the water-cooled condenser 20 is connected to the plate heat exchanger 6 through the six-way valve 16a. The six-way valve 16a is in the second state, that is, the first end 16a-1 of the six-way valve 16a is connected to the second end 16a-2, the fifth end 16a-5 is connected to the sixth end 16a-6, and the third end 16a-3 is connected to the fourth end 16a-4. The first heat exchange loop 100 is in the waste heat recovery state, that is, the first solenoid valve 4 and the first water pump 1 are turned on, and the waste heat of the first heat exchange loop 100 is recovered. The fourth heat exchange loop 400 is in the first refrigeration state, that is, the inlet of the water-cooled condenser 20 is connected to the gas-liquid separator 27 through the compressor 19, and the outlet of the water-cooled condenser 20 is connected to the second port of the outdoor condenser 23 through the inlet 22-1 of the second three-way valve 22 and the first outlet 22-2, and the first port of the outdoor condenser 23 is connected to the third electronic expansion valve 25, and the third electronic expansion valve 25 is connected to the inlet of the battery cooler 17, and the outlet of the battery cooler 17 is connected to the gas-liquid separator 27.

[0133] Optionally, if the operating condition is the first heating and cooling condition, the solid line in the figure is the heat exchange route. Then the first end 16a-1 and the second end 16a-2 of the six-way valve 16a are controlled to be turned on, the fifth end 16a-5 and the sixth end 16a-6 are controlled to be turned on, the inlet 29-1 and the first outlet 29-2 of the third three-way valve 29 are controlled to be turned on, the first end 22-1 and the second end 22-2 of the second three-way valve 22 are controlled to be turned on, and the third end 22-3 is closed, the third electronic expansion valve 25 is turned on, the first solenoid valve 4 is turned on, and the water pumps of the first heat exchange loop 100, the third heat exchange loop 300 and the fifth heat exchange loop 500 are turned on. The waste heat recovery of the first heat exchange loop provides heating for the fifth heat exchange loop, and the cooling of the third heat exchange loop is performed through the fourth heat exchange loop.

[0134] If the operating condition is the second heating and cooling condition, the fifth heat exchange circuit is controlled to be in the second conduction state, the multi-way valve is in the third state, the second heat exchange circuit is in the first conduction state, and the fourth heat exchange circuit is in the heating state, so that the second heat exchange circuit cools the power battery of the third heat exchange circuit, and the fourth heat exchange circuit and the fifth heat exchange circuit heat the cab.

[0135] Fig.17 A schematic diagram of the structure of the thermal management system for the second heating and cooling condition provided in the embodiment of the present application, such as Fig.17 as well as Figure 1-Figure 6As shown, the multi-way valve in the figure takes a six-way valve as an example, and other multi-way valves can be used in specific use, and the embodiment of the present application does not limit this. The fifth heat exchange circuit 500 is in the second conduction state, that is, the plate heat exchanger 6 is connected to the fourth water pump 28 and the fourth expansion water tank 31, and the fourth water pump 28 is connected to the first warm air core 30 through the inlet 29-1 and the first outlet 29-2 of the third three-way valve 29. At this time, the first warm air core 30 works for heating the cab. The first warm air core 30 is also connected to the water-cooled condenser 20, and the water-cooled condenser 20 is connected to the plate heat exchanger 6 through the multi-way valve 16a. The six-way valve 16a is in the third state, that is, the first end 16a-1 and the second end 16a-2 of the six-way valve 1a6 are connected, the fifth end 16a-5 and the third end 16a-3 are connected, and the sixth end 16a-6 and the fourth end 16a-4 are connected. The second heat exchange loop 200 is in the first conduction state, that is, the second end 12-2 and the third end 12-3 of the first three-way valve 12 are conducted, one end of the second radiator 11 is connected to the power battery system 15 through the first three-way valve 12 and the six-way valve 16a, and the other end of the second radiator 11 is connected to the inlet of the battery cooler 17 through the six-way valve 16a. The fourth heat exchange loop 400 is in the heating state, that is, the inlet of the water-cooled condenser 20 is connected to the gas-liquid separator 27 through the compressor 19, the outlet of the water-cooled condenser 20 is connected to the first end of the outdoor condenser 23 through the first electronic expansion valve 21, and the second end of the outdoor condenser 23 is connected to the gas-liquid separator 27 through the second end 22-2 and the third end 22-3 of the second three-way valve 22.

[0136] Optionally, if the operating condition is the second heating and cooling condition, the solid line in the figure is the heat exchange route. Then the first end 16a-1 and the second end 16a-2 of the six-way valve 16a are controlled to be turned on, the fifth end 16a-5 and the third end 16a-3 are turned on, the sixth end 16-6 and the fourth end 16a-4 are controlled to be turned on, the second end 12-2 and the third end 12-3 of the first three-way valve 12 are turned on, the second end 22-2 and the third end 22-3 of the second three-way valve 22 are turned on, the inlet 29-1 and the first outlet 29-2 of the third three-way valve 29 are turned on, the first electronic expansion valve 21 is turned on, the compressor 19 is turned on, the third water pump 14 and the fourth water pump 28 are turned on, and the rest are default settings. The fourth heat exchange loop 400 transfers heat to the fifth heat exchange loop 500 to heat the cab, and the radiator 7 of the second heat exchange loop 200 dissipates heat and cools the power battery system 15.

[0137] If the operating condition is the first common cooling condition, the multi-way valve is controlled to be in the third state and the fourth heat exchange circuit is in the second cooling state, so that the fourth heat exchange circuit cools the power battery and also cools the cab through the air conditioning cold air circuit.

[0138] Fig.18A schematic diagram of the structure of a thermal management system for a first common cooling condition provided in an embodiment of the present application, such as Fig.18 as well as Figure 1-Figure 6 As shown, the multi-way valve in the figure takes a six-way valve as an example, and other multi-way valves can be used in specific use, and the embodiment of the present application does not limit this. The six-way valve 16a is in the first state, that is, the fifth end 16a-5 and the sixth end 16a-6 are connected. The fourth heat exchange circuit 400 is in the second refrigeration state, that is, the inlet of the water-cooled condenser 20 is connected to the gas-liquid separator 27 through the compressor 19, and the outlet of the water-cooled condenser 20 is also connected to the outdoor condenser 23 through the second three-way valve 22. The first port of the outdoor condenser 23 is also connected to the evaporator 26 through the second electronic expansion valve 24, and the evaporator 26 is also connected to the gas-liquid separator 27; the first port of the outdoor condenser 23 is connected to the inlet of the battery cooler 17 through the third electronic expansion valve 25, and the outlet of the battery cooler 17 is also connected to the gas-liquid separator 27.

[0139] Optionally, the operating condition is the first common refrigeration condition, and the solid line in the figure is the heat exchange route. The fifth end 16a-5 and the sixth end 16a-6 of the six-way valve 16a are controlled to be connected, the compressor 19 is turned on, the third water pump 14 is turned on, the second electronic expansion valve 24 and the third electronic expansion valve 25 are turned on, and the first end 22-1 and the third end 22-3 of the second three-way valve 22 are turned on. In this condition, the second electronic expansion valve 24 and the evaporator 26 are used to cool the cab, and the third electronic expansion valve 25 and the battery cooler 17 are used to dissipate heat and cool the power battery of the third heat exchange circuit.

[0140] In an embodiment of the present application, the working requirements of the fuel cell vehicle under the current operating conditions are first obtained, and the most efficient working mode corresponding to the thermal management system is determined based on the current requirements. Then, each heat exchange circuit is regulated to the target state through the vehicle controller, thereby achieving maximum energy saving while each heat exchange circuit meets the operating requirements.

[0141] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, the specific working process of the system and device described above can refer to the corresponding process in the method embodiment, and will not be repeated in this application. In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0142] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or part of the technical solution that contributes to the prior art or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including 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 invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, RandomAccess Memory), disk or optical disk and other media that can store program code.

[0143] The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A thermal management system for a fuel cell vehicle, characterized in that: The thermal management system includes: a first heat exchange circuit of the fuel cell engine system, a second heat exchange circuit of the electric drive system, a third heat exchange circuit of the power battery system, a fourth heat exchange circuit of the air conditioning system, and a fifth heat exchange circuit of the heating system; The first heat exchange circuit exchanges heat with the fifth heat exchange circuit through a plate heat exchanger, the second heat exchange circuit, the third heat exchange circuit, and the fifth heat exchange circuit are connected to each other through a multi-way valve, the fourth heat exchange circuit exchanges heat with the fifth heat exchange circuit through a water-cooled condenser, and the fourth heat exchange circuit exchanges heat with the third heat exchange circuit through a battery cooler; The first heat exchange circuit, the second heat exchange circuit, the third heat exchange circuit, the fourth heat exchange circuit, the fifth heat exchange circuit and the multi-way valve are all connected to a vehicle controller of the fuel cell vehicle.

2. The system according to claim 1, characterized in that The first heat exchange loop includes: the fuel cell engine system, a first water pump, a thermostat, a first solenoid valve, a second solenoid valve, a first radiator and a first expansion water tank; wherein the first expansion water tank is connected to the inlet end of the first water pump, the outlet of the first water pump is connected to the inlet of the fuel cell engine system, the outlet of the fuel cell engine system is connected to the inlet of the thermostat, and the large circulation loop between the first outlet of the thermostat and the inlet of the first water pump has a first heat exchange branch and a second heat exchange branch; the first solenoid valve and the second solenoid valve are respectively arranged on the first heat exchange branch and the second heat exchange branch, and the first solenoid valve is also connected to the plate heat exchanger; The first radiator is arranged on the large circulation loop after the intersection of the first heat exchange branch and the second heat exchange branch; the second outlet of the thermostat is also connected to the inlet of the first water pump through a small circulation loop; The first solenoid valve and the second solenoid valve are connected to the vehicle controller.

3. The system according to claim 1, characterized in that The second heat exchange circuit includes: the electric drive system, a second water pump, a second radiator, a first three-way valve, and a second expansion water tank; the second expansion water tank is connected to the inlet end of the second water pump, the outlet of the second water pump is connected to the inlet of the electric drive system, the outlet of the electric drive system is connected to the multi-way valve, the multi-way valve is also connected to the first inlet of the first three-way valve, the outlet of the first three-way valve is connected to the inlet of the second water pump, and the second inlet of the first three-way valve is also connected to the outlet of the electric drive system through the second radiator; The first three-way valve is connected to the vehicle controller.

4. The system according to claim 1, characterized in that The third heat exchange circuit includes: the power battery system, a third water pump and a third expansion water tank; the third expansion water tank is connected to the inlet of the third water pump, the outlet of the third water pump is connected to the heat exchange inlet of the power battery system, the heat exchange outlet of the power battery system is connected to the multi-way valve, the multi-way valve is connected to the second heat exchange port of the fourth heat exchange circuit, and the second heat exchange port of the fourth heat exchange circuit is also connected to the inlet of the third water pump.

5. The system according to claim 1, characterized in that The fourth heat exchange circuit includes: an air conditioning system, a water-cooled condenser, a second three-way valve, a first electronic expansion valve, a second electronic expansion valve, a third electronic expansion valve, and a battery cooler; the air conditioning system includes: a compressor, a gas-liquid separator, an outdoor condenser, and an evaporator; The inlet of the water-cooled condenser is connected to the gas-liquid separator through the compressor, the outlet of the water-cooled condenser is connected to the first port of the outdoor condenser through the first electronic expansion valve, the outlet of the water-cooled condenser is also connected to the second port of the outdoor condenser through the second three-way valve, the second three-way valve is also connected to the gas-liquid separator, the first port of the outdoor condenser is also connected to the evaporator through the second electronic expansion valve, and the evaporator is also connected to the gas-liquid separator; The first port of the outdoor condenser is also connected to the inlet of the battery cooler through the third electronic expansion valve, and the outlet of the battery cooler is also connected to the gas-liquid separator; The inlet and outlet of the water-cooled condenser are the first heat exchange port of the fourth heat exchange loop, so as to exchange heat with the fifth heat exchange loop; the inlet and outlet of the battery cooler are the second heat exchange port of the fourth heat exchange loop, so as to exchange heat with the third heat exchange loop; The second three-way valve, the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve are all connected to the vehicle controller circuit.

6. The system according to claim 1, characterized in that The fifth heat exchange circuit includes: a first warm air circuit and a second warm air circuit, the first warm air circuit includes: a fourth water pump, a third three-way valve, a first warm air core, and a fourth expansion water tank; Wherein, the fourth expansion water tank is connected to the inlet end of the fourth water pump, the outlet of the fourth water pump is connected to the first warm air core through the third three-way valve, the first warm air core is also connected to the first heat exchange port of the fourth heat exchange circuit, the first heat exchange port of the fourth heat exchange circuit is also connected to the third three-way valve, the third three-way valve is also connected to the plate heat exchanger through the multi-way valve, and the plate heat exchanger is also connected to the inlet of the fourth water pump; The second warm air circuit includes: a fifth water pump, a heater, a second warm air core and a fifth expansion water tank; the fifth expansion water tank is arranged at the inlet of the fifth water pump, the outlet of the fifth water pump is connected to the second warm air core through the heater, and the second warm air core is also connected to the inlet of the fifth water pump.

7. The system according to claim 1, characterized in that The multi-way valve is a six-way valve; Alternatively, the multi-way valve includes: a first four-way valve and a second four-way valve; the third heat exchange circuit is connected to the fifth heat exchange circuit through the first four-way valve, the second heat exchange circuit is connected to the third heat exchange circuit through the second four-way valve, and the first four-way valve is connected to the second four-way valve.

8. A fuel cell vehicle, characterized in that: The fuel cell vehicle comprises: a thermal management system as described in any one of claims 1 to 7 and a vehicle controller, wherein the thermal management system is connected to the vehicle controller.

9. A thermal management control method, characterized in that: A vehicle controller used in a thermal management system according to any one of claims 1 to 7, the method comprising: Determine the operating conditions of fuel cell vehicles; If the operating condition is a power battery preheating condition, the fifth heat exchange circuit in the thermal management system is controlled to be in a first conduction state, the multi-way valve is in a first state, and the first heat exchange circuit in the thermal management system is in a waste heat recovery state, so that the first heat exchange circuit preheats the power battery system in the third heat exchange circuit through the fifth heat exchange circuit; If the operating condition is the first heating condition of the cab, the fifth heat exchange circuit is controlled to be in the second conduction state, the multi-way valve is in the second state, and the first heat exchange circuit is in the waste heat recovery state, so that the first heat exchange circuit heats the cab through the fifth heat exchange circuit; If the operating condition is the second heating condition of the cab, the fifth heat exchange circuit is controlled to be in the third conduction state, the multi-way valve is in the second state, and the first heat exchange circuit is in the waste heat recovery state, so that the first heat exchange circuit and the fifth heat exchange circuit heat the cab together; If the operating condition is the third heating condition of the cab, the fifth heat exchange circuit is controlled to be in the second conduction state, the multi-way valve is in the second state, and the fourth heat exchange circuit is in the heating state, so that only the fourth heat exchange circuit heats the cab through the fifth heat exchange circuit; If the operating condition is the first common heating condition, the fifth heat exchange circuit is controlled to be in the second conduction state, the multi-way valve is in the first state, and the first heat exchange circuit is in the waste heat recovery state, so that the first heat exchange circuit heats the cab and the power battery system through the fifth heat exchange circuit; If the operating condition is the second common heating condition, the fifth heat exchange circuit is controlled to be in the second conduction state, the multi-way valve is in the first state, and the fourth heat exchange circuit is in the heating state, so that the fourth heat exchange circuit heats the cab and the power battery system through the fifth heat exchange circuit.

10. The method according to claim 9, characterized in that The method further comprises: If the operating condition is the first heating and cooling condition, the fifth heat exchange circuit is controlled to be in the second conduction state, the multi-way valve is in the second state, the first heat exchange circuit is in the waste heat recovery state, and the fourth heat exchange circuit is in the first cooling state, so that the first heat exchange circuit heats the cab through the fifth heat exchange circuit, and the fourth heat exchange circuit cools the power battery; If the operating condition is the second heating and cooling condition, the fifth heat exchange circuit is controlled to be in the second conduction state, the multi-way valve is in the third state, the second heat exchange circuit is in the first conduction state, and the fourth heat exchange circuit is in the heating state, so that the second heat exchange circuit cools the power battery, and the fourth heat exchange circuit heats the cab through the fifth heat exchange circuit; If the operating condition is the first common cooling condition, the multi-way valve is controlled to be in the second state and the fourth heat exchange circuit is in the second cooling state, so that the fourth heat exchange circuit cools the power battery and the cab can also be cooled by the air conditioning refrigeration circuit.

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