Heat management system and control methods

Abstract

This invention provides a thermal management system and control method. The thermal management system includes: a fuel cell main heat dissipation management device, a fuel cell auxiliary heat dissipation and motor electronic control thermal management device, a power battery thermal management device, and an air conditioning and passenger compartment thermal management device. The heat from the fuel cell main heat dissipation management device is supplied to the air conditioning and passenger compartment thermal management device via a heating device. The fuel cell auxiliary heat dissipation and motor electronic control thermal management device includes a second radiator, and the power battery thermal management device includes a third radiator. The second and third radiators share a second fan. A heat exchanger is installed between the pipes of the fuel cell main heat dissipation management device and the power battery thermal management device. A battery cooler is installed between the pipes of the air conditioning and passenger compartment thermal management device and the power battery thermal management device. This achieves the goal of improving energy utilization efficiency.

Description

Technical Field

[0001] This invention belongs to the field of new energy technology, and in particular relates to a heat management system and control method. Background Technology

[0002] Hydrogen fuel cell engines use the reaction of hydrogen and oxygen from the air to generate electricity, providing the power needed for a car to run. As a clean energy power source, hydrogen fuel cell engines are receiving increasing attention from governments and automakers. While generating electricity, hydrogen fuel cell engines also produce a significant amount of heat. The thermal management system of hydrogen fuel cell vehicles is similar to that of other new energy vehicles, including a power battery, motor, motor controller, and air conditioning system, in addition to the unique hydrogen fuel cell engine.

[0003] Existing thermal management technologies include using the heat generated by the fuel cell stack to heat the passenger compartment and the power battery, using a PTC to heat the fuel cell, and using an air conditioning compressor to cool the power battery. Alternatively, heat can be dissipated through a finned radiator in the fuel cell engine compartment; the power battery can dissipate heat through a heat exchanger coupled with the air conditioning cooling cycle; and when the passenger compartment and fuel cell require heating, they can be heated separately through corresponding water-heated PTCs.

[0004] The aforementioned technologies have the following problems: When the power battery needs to be heated, it must be heated through the fuel cell. When the fuel cell temperature is low, the fuel cell coolant must be heated first, and then the fuel cell coolant heats the power battery coolant. The heating effect is slow. In some operating conditions, the fuel cell engine does not need to be started, but it still needs to be started to meet the power battery's needs, resulting in unnecessary hydrogen consumption. When the power battery needs to be cooled, the compressor can only be started for cooling, resulting in energy consumption. When the passenger compartment needs to be heated, the hydrogen fuel cell must first raise the water temperature before providing heating for the passenger compartment, resulting in poor passenger compartment comfort or unnecessary hydrogen consumption.

[0005] The power battery and the passenger compartment are heated by their respective water heaters. The fuel cell thermal management system is independent of the passenger compartment thermal management system and the power battery thermal management system, resulting in low energy utilization.

[0006] In summary, existing technologies suffer from at least the problem of low energy utilization efficiency. Summary of the Invention

[0007] In view of the problems existing in the prior art, the present invention provides a heat management system and control method, which at least partially solves the problem of low energy utilization efficiency in the prior art.

[0008] In a first aspect, embodiments of this disclosure provide a heat management system, including:

[0009] Fuel cell main heat dissipation management device, fuel cell auxiliary heat dissipation and motor electronic control heat management device, power battery heat management device, and air conditioning and passenger compartment heat management device;

[0010] The heat from the main heat dissipation management device of the fuel cell provides heat to the air conditioning and passenger compartment heat management devices through the heating device.

[0011] The fuel cell auxiliary heat dissipation and motor electronic control thermal management device includes a second heat sink, and the power battery thermal management device includes a third heat sink. The second heat sink and the third heat sink share a second fan.

[0012] A heat exchanger is installed between the pipes of the fuel cell main heat dissipation management device and the pipes of the power battery thermal management device.

[0013] A battery cooler is installed between the pipes of the air conditioning and passenger compartment thermal management device and the pipes of the power battery thermal management device.

[0014] Optionally, the heating device includes a blower, a heating core, an evaporator, and a PTC heater. The blower is used to blow air that has been heated by the heating core or the PTC heater and cooled by the evaporator into the passenger compartment.

[0015] Optionally, the fuel cell main heat dissipation management device includes a fuel cell, a first water pump, a first three-way valve, a second three-way valve, a first heat dissipation device, a heater core, a two-way valve, and a heat exchanger.

[0016] The first water pump is used to make the first flowing medium flow in the fuel cell main heat dissipation management device. Two pipelines are connected at the outlet of the fuel cell. One pipeline is connected to the inlet of the first three-way valve, and the other pipeline is connected to the inlet of the two-way valve. A heat exchanger is installed on the pipeline between the outlet of the two-way valve and the inlet of the first water pump.

[0017] One outlet of the first three-way valve is connected to the inlet of the first water pump via a pipe, and the other outlet of the first three-way valve is connected to the inlet of the second three-way valve. A first heat dissipation device is installed on the pipe between one outlet of the second three-way valve and the inlet of the first water pump, and a warm air core is installed on the pipe between the other outlet of the second three-way valve and the inlet of the first water pump.

[0018] Optionally, the first heat dissipation device includes a first heat sink and a first fan, wherein the first fan is an electric fan.

[0019] Optionally, the fuel cell auxiliary heat dissipation and motor electronic control thermal management device includes a second water pump, a third three-way valve, a motor controller, a drive motor, a second radiator, and a second fan.

[0020] The second water pump is used to make the second flowing medium flow in the fuel cell auxiliary radiator and motor electronic control thermal management device. One outlet of the third three-way valve is connected to the fuel cell auxiliary radiator inlet through a pipe. The other outlet of the third three-way valve is connected to the motor controller inlet through a pipe. The motor controller outlet is connected to the drive motor inlet through a pipe. The inlet of the third three-way valve is connected to the second water pump outlet through a pipe. The fuel cell auxiliary radiator outlet and the drive motor outlet are connected to the second radiator inlet through a pipe. The second radiator outlet is connected to the second water pump inlet through a pipe.

[0021] Optionally, the power battery thermal management device includes a power battery, a third water pump, a water heating PTC, a fourth three-way valve, a fifth three-way valve, a heat exchanger, a third radiator, and a battery cooler.

[0022] The third water pump is used to make the third flowing medium flow in the power battery thermal management device. The power battery outlet is connected to the inlet of the fourth three-way valve. A water-heated PTC is installed on the pipeline between one outlet of the fourth three-way valve and the inlet of the third water pump. The pipeline between the outlet of the water-heated PTC and the inlet of the third water pump is connected to the heat exchanger. The other outlet of the fourth three-way valve is connected to the inlet of the fifth three-way valve. A third radiator is installed on the pipeline between one outlet of the fifth three-way valve and the inlet of the third water pump. A battery cooler is installed on the pipeline between the other outlet of the fifth three-way valve and the inlet of the third water pump.

[0023] Optionally, the air conditioning and passenger compartment thermal management device includes a condenser, an air conditioning compressor, a third fan, an evaporator, a PTC heater, a first electronic expansion valve, and a second electronic expansion valve. The evaporator, air conditioning compressor, condenser, and first electronic expansion valve are connected in sequence through pipes. The PTC heater is used to heat the passenger compartment, and the third fan is used to dissipate heat from the condenser. The outlet of the second electronic expansion valve is connected to the inlet of the battery cooler, and the inlet of the air conditioning compressor is connected to the outlet of the battery cooler.

[0024] Optionally, the first flowing medium in the main heat dissipation management device of the fuel cell is fuel cell coolant; the second flowing medium in the auxiliary heat dissipation and motor control thermal management device of the fuel cell is a mixed solution of water and ethylene glycol; the third flowing medium in the power battery thermal management device is a mixed solution of water and ethylene glycol; and the fourth flowing medium in the air conditioning and passenger compartment thermal management device is vehicle air conditioning refrigerant.

[0025] Secondly, embodiments of this disclosure also provide a heat management system control method, applied to any of the management systems described in the first aspect, comprising:

[0026] The temperatures of the main heat dissipation management device of the fuel cell, the auxiliary heat dissipation and motor control thermal management device of the fuel cell, the power battery thermal management device, and the air conditioning and passenger compartment thermal management device are acquired respectively. Based on the acquired temperatures, the main heat dissipation management device of the fuel cell, the auxiliary heat dissipation and motor control thermal management device, the power battery thermal management device, and the air conditioning and passenger compartment thermal management device are controlled respectively.

[0027] Optionally, the main heat dissipation management device for controlling the fuel cell includes starting a first water pump, determining the difference between the temperature Tfi of the first flowing medium at the fuel cell inlet and a set threshold temperature Tf2 based on the acquired temperature data; if Tfi > Tf2, starting a first fan, controlling a first three-way valve to allow the first flowing medium to flow into the first radiator, and adjusting the opening of the first three-way valve and the speed of the first water pump and the first fan according to the value of temperature Tfi; if Tfi ≤ Tf2, controlling the first three-way valve to allow the first flowing medium to flow directly back to the fuel cell.

[0028] The control device for the fuel cell auxiliary cooling system and the electric motor thermal management includes starting the second water pump; determining whether the acquired inlet temperature Tai of the fuel cell auxiliary cooling system, the drive motor temperature Tq, and the motor controller temperature Tk exceed the set threshold temperatures, wherein the threshold temperature corresponding to temperature Tai is Ta1, the threshold temperature corresponding to temperature Tq is Tq1, and the threshold temperature corresponding to temperature Tk is Tk1; if Tai > Ta1, or Tq > Tq1, or Tk > Tk1, the second flowing medium flows through the fuel cell auxiliary cooling system, the motor controller, and the drive motor respectively, and then flows into the second radiator, and the second fan is started to dissipate heat from the second radiator; the opening of the third three-way valve and the speed of the second water pump and the second fan are adjusted according to the magnitude of temperature Tai, temperature Tq, and temperature Tk; if Tai ≤ Ta1, Tq ≤ Tq1, and Tk ≤ Tk1, the third three-way valve is controlled so that the second flowing medium flows through the fuel cell auxiliary cooling system, the motor controller, and the drive motor respectively, and the second fan is not started;

[0029] The control device for the power battery thermal management includes starting the third water pump, determining whether the power battery temperature Td is higher than a set threshold temperature Tmax1 based on the acquired power battery temperature Td, and if Td > Tmax1, adjusting the opening of the fourth and fifth three-way valves to allow the third flowing medium to flow through the battery cooler, and turning on the air conditioning compressor, the third fan, and the second electronic expansion valve in the air conditioning and passenger compartment thermal management device to cool the battery cooler; if Td ≤ Tmax1, determining whether the power battery temperature Td is higher than its set threshold temperature Tmax2, and if Td > Tmax2, closing the second electronic expansion valve and the air conditioning compressor, starting the second fan, and adjusting the fourth and fifth three-way valves to allow the third flowing medium to flow through the third radiator; if Td ≤ Tmax2, determining whether the power battery temperature Td is lower than the operating temperature Tmin, and comparing the temperature Tfo of the first flowing medium at the fuel cell outlet with the set threshold temperature Tf1. The temperature Tfo is compared with the temperature Tdo of the third flowing medium at the power battery outlet. If Td ≥ Tmin, the opening of the fourth and fifth three-way valves is adjusted to allow the third flowing medium to flow through the battery cooler, and the fourth flowing medium of the air conditioning and passenger compartment thermal management devices is prevented from flowing through the battery cooler. If Td < Tmin and Tfo ≤ Tdo, the water-heated PTC is activated, and the fourth three-way valve is adjusted to allow the third flowing medium to flow through the water-heated PTC for heating. If Td < Tmin and Tdo < Tfo < Tf1, the two-way valve of the fuel cell main heat dissipation management device and the water-heated PTC are activated, and the fourth three-way valve is adjusted to allow the third flowing medium to flow through the water-heated PTC and the plate heat exchanger for heating. If Td < Tmin and Tfo ≥ Tf1, the two-way valve is activated, and the fourth three-way valve is adjusted to allow the third flowing medium to flow through the water-heated PTC and the plate heat exchanger for heating.

[0030] The control air conditioning and passenger compartment thermal management device includes, in response to a passenger compartment cooling demand command, starting and adjusting the speeds of the air conditioning compressor, the third fan, and the blower, and adjusting the opening of the first electronic expansion valve, based on a set threshold temperature and the acquired passenger compartment temperature; in response to a passenger compartment heating demand command, determining whether the temperature Tfo of the first flowing medium at the fuel cell outlet exceeds the threshold temperature Tn1, based on a set threshold temperature and the acquired passenger compartment temperature; if Tfo > Tn1, starting the first water pump, adjusting the opening of the first three-way valve and the second three-way valve to allow the first flowing medium to flow through the warm air core, and starting the blower to blow the air heated by the warm air core into the passenger compartment; if Tfo ≤ Tn1, starting the blower and the air heater PTC, using the blower and the air heater PTC to heat the passenger compartment, and adjusting the opening of the first three-way valve and the second three-way valve to prevent the first flowing medium from flowing through the warm air core.

[0031] The present invention provides a thermal management system and control method. The thermal management system includes a heat exchanger installed between the pipelines of the fuel cell main heat dissipation management device and the power battery thermal management device. The main heat dissipation management device is preferentially used to heat the power battery thermal management device. When the main heat dissipation management device is insufficient, a water-cooled PTC heater is used. A heating device is installed in the main heat dissipation management device. When the heat dissipation of the main heat dissipation management device is sufficient, the heating device provides heat to the passenger compartment, thus utilizing the heat generated by the fuel cell. When the main heat dissipation system is insufficient, a wind-cooled PTC heater is used to heat the passenger compartment. An air-cooled radiator is installed in the power battery thermal management device. When the power battery needs cooling, a third radiator is preferentially used for cooling. When the third radiator is insufficient, a battery cooler installed between the pipelines of the air conditioning and passenger compartment thermal management devices and the power battery thermal management device cools the power battery. This achieves the goal of improving energy utilization efficiency. Attached Figure Description

[0032] The above and other objects, features and advantages of this disclosure will become more apparent from the accompanying drawings, in which like reference numerals generally denote like parts.

[0033] Figure 1 A schematic block diagram of a heat management system provided in an embodiment of this disclosure;

[0034] Figure 2 A control flowchart of the fuel cell main heat dissipation management device provided in the embodiments of this disclosure;

[0035] Figure 3 A control flowchart of the fuel cell auxiliary heat dissipation and motor electronic control thermal management device provided in the embodiments of this disclosure;

[0036] Figure 4 A control flowchart of a power battery thermal management device provided in an embodiment of this disclosure;

[0037] Figure 5 Control flowchart of the air conditioning and passenger compartment thermal management device provided in the embodiments of this disclosure;

[0038] in:

[0039] 101-Heater core; 102-Blower; 103-First radiator; 104-First fan; 105-Second three-way valve; 106-First three-way valve; 107-Two-way valve; 108-First water pump; 109-Heat exchanger; 201-Second water pump; 202-Third three-way valve; 203-Second fan; 204-Second radiator; 301-Third water pump; 302-Third radiator; 303-Water heating PTC; 304-Fourth three-way valve; 305-Fifth three-way valve; 306-Battery cooler; 401-Third fan; 402-Condenser; 403-Air conditioning compressor; 404-Second electronic expansion valve; 405-Air heating PTC; 406-Evaporator; 407-First electronic expansion valve. Detailed Implementation

[0040] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0041] It should be understood that the following specific examples illustrate the implementation of this disclosure, and those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0042] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0043] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this disclosure. The drawings only show the components related to this disclosure and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0044] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0045] The meanings of the terms used in this embodiment are as follows:

[0046] Thermal management: The process of adjusting and controlling the temperature or temperature difference of an object by means of heating or cooling, according to the specific requirements of the object.

[0047] Hydrogen fuel cell vehicles: Vehicles that use hydrogen as their primary energy source for mobility, with fuel cells and electric motors replacing conventional engines;

[0048] FC: Hydrogen fuel cell engine, an engine system that converts chemical energy into electrical energy through an electrochemical reaction of hydrogen and oxygen;

[0049] Fuel cell engine main heat dissipation system: mainly responsible for controlling the heat generated by the fuel cell engine stack;

[0050] Fuel cell engine auxiliary heat dissipation system: mainly responsible for controlling the heat generated by related accessories that maintain the normal operation of the fuel cell engine stack;

[0051] Power battery: Stores the electrical energy generated by the hydrogen fuel cell engine and provides the necessary electrical energy for the drive motor and other high-voltage accessories;

[0052] Drive motor: Converts electrical energy generated by the hydrogen fuel cell engine and power battery into kinetic energy to drive the car.

[0053] PTC air heater: uses high-voltage electricity to heat the air flowing through the PTC surface to meet the heating requirements of the passenger compartment;

[0054] Heating core: The high-temperature coolant flowing through the heating core heats the air flowing outside the heating core, and the heated air enters the passenger compartment to meet the heating, defrosting and defogging requirements of the passenger compartment.

[0055] Water-heated PTC: It uses high-voltage electricity to heat the coolant flowing through the PTC, meeting the low-temperature heating requirements of the power battery;

[0056] Electric air conditioner compressor: It plays the role of compressing and driving the refrigerant in the air conditioner refrigerant circuit. The air conditioner compressor draws low-temperature and low-pressure gaseous refrigerant from the low-pressure area and compresses it into high-temperature and high-pressure superheated vapor refrigerant.

[0057] Condenser: A type of heat exchanger, it is a superheated vapor refrigerant that has been compressed by the compressor into a high-temperature and high-pressure vapor. The vapor enters the condenser for cooling and releases heat to the surrounding air. It is then cooled into a subcooled liquid refrigerant.

[0058] Electronic expansion valve: allows medium-temperature, high-pressure liquid refrigerant to pass through its throttling mechanism and become low-temperature, low-pressure wet vapor;

[0059] Evaporator: The refrigerant, after passing through the electronic expansion valve, vaporizes and absorbs heat in the evaporator, exchanging heat with the air flowing outside the evaporator to cool the air.

[0060] Blower: The blower draws in air from inside or outside the vehicle through the rotation of the impeller, and the air enters the air conditioning unit under the action of centrifugal force;

[0061] Chiller (Battery Cooler): The refrigerant introduced into the air conditioning system evaporates in the battery cooler after being throttled by the electronic expansion valve. It absorbs the heat of the coolant in the battery cooling circuit and thus cools the battery.

[0062] Electric water pump: Increases the pressure of coolant in the system by rotating the impeller, thus enabling the coolant to circulate within the system;

[0063] Three-way valve: In the cooling circuit, it is used to change the flow direction of the coolant and connect different cooling circuits;

[0064] Two-way valve: In the cooling circuit, it is used to open and close the cooling path;

[0065] Radiator: Coolant flows inside the radiator core, while air passes through the outside of the radiator core. Hot coolant is cooled by exchanging heat with the air;

[0066] Electric fan: The rotation of the fan impeller drives the air around the heat sink and condenser to flow across their surface;

[0067] Plate heat exchanger: A high-efficiency heat exchanger consisting of a series of metal plates with a certain corrugated shape stacked together. Coolants at different temperatures exchange heat by passing through different channels of the plate heat exchanger.

[0068] For ease of understanding, such as Figure 1 As shown, this embodiment discloses a heat management system, including:

[0069] Fuel cell main heat dissipation management device, fuel cell auxiliary heat dissipation and motor electronic control heat management device, power battery heat management device, and air conditioning and passenger compartment heat management device;

[0070] like Figure 1 In the diagram, the main heat dissipation management device for the fuel cell is connected by a thin solid line, the auxiliary heat dissipation and motor control heat management device for the fuel cell is connected by a dashed line, the power battery heat management device is connected by a dotted line, and the air conditioning and passenger compartment heat management device is connected by a thick solid line.

[0071] The first flowing medium in the main heat dissipation management device of the fuel cell is fuel cell coolant; the second flowing medium in the auxiliary heat dissipation and motor control heat management device of the fuel cell is a mixed solution of water and ethylene glycol; the third flowing medium in the power battery heat management device is a mixed solution of water and ethylene glycol; and the fourth flowing medium in the air conditioning and passenger compartment heat management device is vehicle air conditioning refrigerant.

[0072] The heat from the main heat dissipation management device of the fuel cell provides heat to the air conditioning and passenger compartment heat management devices through the heating device.

[0073] The fuel cell auxiliary heat dissipation and motor electronic control thermal management device includes a second radiator 204, and the power battery thermal management device includes a third radiator 302. The second radiator 204 and the third radiator 302 share a second fan 203.

[0074] A heat exchanger 109 is installed between the pipeline of the fuel cell main heat dissipation management device and the pipeline of the power battery thermal management device.

[0075] A battery cooler 306 is installed between the pipes of the air conditioning and passenger compartment thermal management device and the pipes of the power battery thermal management device.

[0076] Optionally, the heating device includes a blower 102, a heating core 101, an evaporator 406, and a PTC heater 405. The blower 102 is used to blow air that has been heated by the heating core 101 or the PTC heater 405 and cooled by the evaporator 406 into the passenger compartment.

[0077] Optionally, the fuel cell main heat dissipation management device includes a fuel cell, a first water pump 108, a first three-way valve 106, a second three-way valve 105, a first heat dissipation device, a heater core 101, a two-way valve 107, and a heat exchanger 109.

[0078] The first water pump 108 is used to make the first flowing medium flow in the fuel cell main heat dissipation management device. Two pipelines are connected at the outlet of the fuel cell. One pipeline is connected to the inlet of the first three-way valve 106, and the other pipeline is connected to the inlet of the two-way valve 107. A heat exchanger 109 is installed on the pipeline between the outlet of the two-way valve 107 and the inlet of the first water pump 108.

[0079] One outlet of the first three-way valve 106 is connected to the inlet of the first water pump 108 via a pipe, and the other outlet of the first three-way valve 106 is connected to the inlet of the second three-way valve 105. A first heat dissipation device is installed on the pipe between one outlet of the second three-way valve 105 and the inlet of the first water pump 108, and a warm air core 101 is installed on the pipe between the other outlet of the second three-way valve 105 and the inlet of the first water pump 108.

[0080] Optionally, the first heat dissipation device includes a first heat sink 103 and a first fan 104, wherein the first fan 104 is an electronic fan.

[0081] Optionally, the fuel cell auxiliary heat dissipation and motor electronic control thermal management device includes a second water pump 201, a third three-way valve 202, a motor controller, a second radiator 204 for the drive motor, and a second fan 203.

[0082] The second water pump 201 is used to make the second flowing medium flow in the fuel cell auxiliary radiator and motor electronic control thermal management device. One outlet of the third three-way valve 202 is connected to the fuel cell auxiliary radiator inlet through a pipe. The other outlet of the third three-way valve 202 is connected to the motor controller inlet through a pipe. The motor controller outlet is connected to the drive motor inlet through a pipe. The inlet of the third three-way valve 202 is connected to the outlet of the second water pump 201 through a pipe. The fuel cell auxiliary radiator outlet and the drive motor outlet are connected to the inlet of the second radiator 204 through a pipe. The outlet of the second radiator 204 is connected to the inlet of the second water pump 201 through a pipe.

[0083] Optionally, the power battery thermal management device includes a power battery, a third water pump 301, a water heating PTC 303, a fourth three-way valve 304, a fifth three-way valve 305, a third radiator 302, and a battery cooler 306.

[0084] The third water pump 301 is used to make the third flowing medium flow in the power battery thermal management device. The power battery outlet is connected to the inlet of the fourth three-way valve 304. A water heating PTC 303 is installed on the pipeline between one outlet of the fourth three-way valve 304 and the inlet of the third water pump 301. The pipeline between the outlet of the water heating PTC 303 and the inlet of the third water pump 301 is connected to the heat exchanger 109. The other outlet of the fourth three-way valve 304 is connected to the inlet of the fifth three-way valve 305. A third radiator 302 is installed on the pipeline between one outlet of the fifth three-way valve 305 and the inlet of the third water pump 301. A battery cooler 306 is installed on the pipeline between the other outlet of the fifth three-way valve 305 and the inlet of the third water pump 301.

[0085] Optionally, the air conditioning and passenger compartment thermal management device includes a condenser 402, an air conditioning compressor 403, a third fan 401, an evaporator 406, a PTC heater 405, a first electronic expansion valve 407, and a second electronic expansion valve 404. The evaporator 406, the air conditioning compressor 403, the condenser 402, and the first electronic expansion valve 407 are connected in sequence through pipes. The PTC heater 405 is used to heat the passenger compartment, and the third fan 401 is used to dissipate heat from the condenser 402. The outlet of the second electronic expansion valve 404 is connected to the inlet of the battery cooler 306, and the inlet of the air conditioning compressor 403 is connected to the outlet of the battery cooler 306.

[0086] The first water pump 108, the second water pump 201, and the third water pump 301 are electronic water pumps, and the first fan 104, the second fan 203, and the third fan 401 are electronic fans. The heat exchanger 109 is a plate heat exchanger.

[0087] The working process of the fuel cell main heat dissipation management device is as follows:

[0088] When the fuel cell starts working, the first water pump 108 operates to provide power for the fuel cell-specific coolant in the system. The coolant in the system flows sequentially from the cooling water pump through the FC, the first three-way valve 106, and the second three-way valve 105. According to the temperature of the FC and the temperature of the coolant in the system, the opening of the first three-way valve 106 is adjusted so that the first flowing medium flows through the first radiator 103 or directly back to the first water pump 108. The high-temperature first flowing medium in the first radiator 103 becomes a low-temperature first flowing medium after flowing out of the radiator and then flows through the FC to cool the FC.

[0089] The control process of the fuel cell main heat dissipation management device is as follows:

[0090] After the system starts, the first water pump 108 is activated. The fuel cell engine controller determines the difference between the coolant temperature Tfi at the fuel cell engine inlet and the set threshold temperature Tf2 based on data collected by the corresponding sensors. If Tfi > Tf2 and remains so for 30 seconds, the first fan 104 is activated, the opening of the first three-way valve 106 is adjusted, and the second three-way valve 105 is connected to the first radiator 103. Based on the value of Tfi, the opening of the first three-way valve 106, the speed of the first water pump 108, and the speed of the first fan 104 are adjusted. If Tfi ≤ Tf2, the opening of the first three-way valve 106 is adjusted so that the first flowing medium flows directly back to the fuel cell without passing through the first radiator 103.

[0091] The specific working process of the fuel cell auxiliary heat dissipation and motor electronic control thermal management device is as follows:

[0092] When the fuel cell engine, drive motor, and motor controller start working, the second water pump 201 starts operating to provide power to the second flowing medium in the device. The second flowing medium is cooled by the auxiliary cooling system on the FC and the motor controller and drive motor on the vehicle through the third three-way valve 202. The high-temperature coolant is cooled by the second radiator 204 and then flows back to the second water pump 201.

[0093] Control logic of fuel cell auxiliary heat dissipation and motor electronic control thermal management device:

[0094] When any of the fuel cell engine, drive motor, or motor controller starts operating, the second water pump 201 is activated. The controller, based on the inlet temperature Tai of the fuel cell auxiliary cooling system, the drive motor temperature Tq, and the motor controller temperature Tk collected by the corresponding sensors, determines whether their threshold temperatures Ta1, Tq1, and Tk1 have exceeded. If Tai > Ta1, Tq > Tq1, or Tk > Tk1 and this condition persists for 30 seconds, the second fan 203 is activated. The opening of the third three-way valve 202, as well as the speeds of the second water pump 201 and the second fan 203, are adjusted according to the values ​​of Tai, Tq, and Tk. If Tai ≤ Ta1, Tq ≤ Tq1, and Tk ≤ Tk1, the opening of the third three-way valve 202 is adjusted to ensure the second flowing medium flows evenly through the fuel cell engine auxiliary cooling system, drive motor, and motor controller; the second fan 203 does not need to be activated.

[0095] The working process of the power battery thermal management device is as follows:

[0096] When the power battery starts working, the third water pump 301 starts running. The third flow medium in the drive system flows through the power battery. The opening of the fourth three-way valve 304 and the fifth three-way valve 305 is adjusted so that the third flow medium flows through the fourth three-way valve 304, the fifth three-way valve 305, and the battery cooler 306 in sequence, and then flows back to the third water pump 301. At this time, the battery cooler 306 does not work.

[0097] When the power battery needs heating, the fourth three-way valve 304 adjusts its opening, allowing the third flowing medium to flow through the water-heating PTC 303 and the plate heat exchanger 109. After being heated by the PTC 303 or the plate heat exchanger 109, the third flowing medium flows back to the third water pump 301. Driven by the third water pump 301, it then flows through the power battery to heat it. If the fuel cell engine coolant temperature is high, the two-way valve 107 opens, allowing the high-temperature first flowing medium of the fuel cell engine to heat the low-temperature third flowing medium of the power battery in the plate heat exchanger 109. If the first flowing medium temperature of the fuel cell is low, the high-voltage electric current directly activates the PTC 303 to heat the third flowing medium.

[0098] When the power battery needs to be cooled, the opening of the fourth three-way valve 304 is adjusted so that the high-temperature third flowing medium flows through the fifth three-way valve 305. The opening of the fifth three-way valve 305 is adjusted so that the third flowing medium flows through the third radiator 302 for heat dissipation. The cooled third flowing medium then flows back to the third water pump 301, which drives it to flow through the power battery to cool it down.

[0099] When the cooling demand of the power battery cannot be met by the third radiator 302, the fifth three-way valve 305 adjusts its opening, allowing the high-temperature third fluid medium to flow through the battery cooler 306. Heat exchange occurs between the high-temperature third fluid medium and the low-temperature air conditioning refrigerant in the battery cooler 306. The low-temperature third fluid medium, after exiting the battery cooler 306, flows back to the third water pump 301, and then, driven by the third water pump 301, flows through the power battery to cool it. At this time, the air conditioning compressor 403 and the second electronic expansion valve 404 are activated. The fourth fluid medium of the air conditioning system, after being compressed by the air conditioning compressor 403, flows through the condenser 402 and condenses into a liquid state. After being throttled by the second electronic expansion valve 404, it vaporizes in the battery cooler 306, absorbing heat from the third fluid medium, and then flows back to the air conditioning compressor 403.

[0100] The control logic of the power battery thermal management device is as follows:

[0101] The power battery starts working, activating the third water pump 301. The controller, based on the power battery temperature Td collected by the corresponding sensors, determines whether Td is higher than its set maximum threshold temperature Tmax1. If Td > Tmax1 and remains so for 30 seconds, the controller adjusts the opening of the fourth three-way valve 304 and the fifth three-way valve 305, allowing the third flowing medium to flow through the battery cooler 306. The controller then activates the air conditioning compressor 403, the third fan 401, and the second electronic expansion valve 404, allowing the fourth flowing medium of the air conditioning unit to flow through the battery cooler 306. If... If Td ≤ Tmax1, determine if the power battery temperature Td is higher than its set second-highest threshold temperature Tmax2. If Td > Tmax2 and remains so for 30 seconds, close the second electronic expansion valve 404. If the air conditioning unit has no cooling requirement at this time, turn off the air conditioning compressor 403 and the third fan 401, start the second fan 203, and adjust the opening of the fourth three-way valve 304 and the fifth three-way valve 305 to allow the third flowing medium to flow through the third radiator 302. If Td ≤ Tmax2, determine if the power battery temperature Td is lower than its operating temperature Tmin. The temperature of the first flowing medium Tfo at the fuel cell outlet is compared with the set threshold temperature Tf1 and the temperature of the third flowing medium Tdo at the power battery outlet. If Td ≥ Tmin, the opening of the fourth three-way valve 304 and the fifth three-way valve 305 is adjusted so that the third flowing medium flows through the battery cooler 306. At this time, the fourth flowing medium in the air conditioning unit does not need to flow through the battery cooler 306. If Td < Tmin, Tfo ≤ Tdo, and this condition persists for 30 seconds, the water heating PTC 303 is activated, and the fourth three-way valve 304 is adjusted so that the third flowing medium flows through the water... The PTC303 is used for heating; if Td < Tmin, Tdo < Tfo < Tf1, and this continues for 30 seconds, the two-way valve 107 and the PTC303 are started, and the fourth three-way valve 304 is adjusted so that the third flowing medium flows through the PTC303 and the plate heat exchanger 109 for heating; if Td < Tmin, Tfo ≥ Tf1, and this continues for 30 seconds, the two-way valve 107 is started, and the fourth three-way valve 304 is adjusted so that the third flowing medium flows through the PTC303 and the plate heat exchanger 109, and is heated in the plate heat exchanger 109.

[0102] The specific working process of the air conditioning and passenger compartment thermal management system is as follows:

[0103] When the passenger compartment needs heating, if the temperature of the first flowing medium in the fuel cell engine is high, the first water pump 108 is controlled to operate, and the opening of the first three-way valve 106 and the second three-way valve 105 is adjusted so that part of the first flowing medium flows through the heater core 101. The blower 102 blows the air heated by the air heated by the heater core 101 into the passenger compartment to meet the heating requirements of the passenger compartment. If the temperature of the first flowing medium in the fuel cell engine is low, the air heater PTC405 is started, and the blower 102 blows the air heated by the air heater PTC405 into the passenger compartment to meet the heating requirements of the passenger compartment.

[0104] When the passenger compartment needs cooling, the air conditioning compressor 403 is activated. The refrigerant compressed by the air conditioning compressor 403 is condensed into a liquid by the condenser 402. The liquid refrigerant atomizes as it flows through the first electronic expansion valve 407. The atomized refrigerant then vaporizes in the evaporator 406, absorbing heat from the air on the surface of the evaporator 406. The refrigerant then flows back to the air conditioning compressor 403. The blower 102, after starting, blows the air cooled by the evaporator 406 into the passenger compartment to meet the cooling requirements of the passenger compartment.

[0105] The control process for the air conditioning and passenger compartment thermal management system is as follows:

[0106] Passenger compartment cooling: When the passenger compartment starts to cool, the controller starts and adjusts the speed of the air conditioning compressor 403, the third fan 401 and the blower 102 according to the set threshold temperature and the relevant temperature collected, and adjusts the opening of the first electronic expansion valve 407 according to other relevant signals.

[0107] Passenger compartment heating: When the passenger compartment heating requirement is activated, the controller determines whether the temperature of the first flowing medium Tfo at the outlet of the fuel cell engine exceeds its threshold temperature Tn1 based on the set threshold temperature and the relevant collected temperatures. If Tfo > Tn1 and continues for 30 seconds, the first water pump 108 is activated, and the opening of the first three-way valve 106 and the second three-way valve 105 is adjusted so that the first flowing medium of the fuel cell flows through the heater core 101. The blower 102 is activated to blow the heated air from the heater core 101 into the passenger compartment. If Tfo ≤ Tn1, the blower 102 is activated, the air heater PTC405 is activated, and the opening of the first three-way valve 106 and the second three-way valve 105 is adjusted so that the first flowing medium of the fuel cell does not flow through the heater core 101.

[0108] like Figures 2 to 5 As shown, a heat management system control method, using the management system of this embodiment, includes:

[0109] The temperatures of the main heat dissipation management device of the fuel cell, the auxiliary heat dissipation and motor control thermal management device of the fuel cell, the power battery thermal management device, and the air conditioning and passenger compartment thermal management device are acquired respectively. Based on the acquired temperatures, the main heat dissipation management device of the fuel cell, the auxiliary heat dissipation and motor control thermal management device, the power battery thermal management device, and the air conditioning and passenger compartment thermal management device are controlled respectively.

[0110] Optional, such as Figure 2 As shown, the main heat dissipation management device for the fuel cell includes starting the first water pump 108, determining the temperature Tfi of the first flowing medium at the fuel cell inlet and the value of a set threshold temperature Tf2 based on the acquired temperature data; if Tfi > Tf2, starting the first fan 104, controlling the first three-way valve 106 to allow the first flowing medium to flow into the first radiator 103, and adjusting the opening of the first three-way valve 106 and the rotation speed of the first water pump 108 and the first fan 104 according to the value of temperature Tfi; if Tfi ≤ Tf2, controlling the first three-way valve 106 to allow the first flowing medium to flow directly back to the fuel cell.

[0111] like Figure 3 As shown, the control device for fuel cell auxiliary cooling and motor thermal management includes starting the second water pump 201; determining whether the acquired inlet temperature Tai of the fuel cell auxiliary cooling system, drive motor temperature Tq, and motor controller temperature Tk exceed a set threshold temperature, wherein the threshold temperature corresponding to temperature Tai is Ta1, the threshold temperature corresponding to drive motor temperature Tq is Tq1, and the threshold temperature corresponding to motor controller temperature Tk is Tk1; if Tai > Ta1, or Tq > Tq1, or Tk > Tk1, the second flowing medium flows through the fuel cell auxiliary cooling system respectively. After passing through the fuel cell auxiliary distributor, motor controller, and drive motor, the fluid flows into the second radiator 204, and the second fan 203 is activated to cool the second radiator 204. The opening of the third three-way valve 202, as well as the speed of the second water pump 201 and the second fan 203, are adjusted according to the temperature Tai, temperature Tq, and temperature Tk. If Tai≤Ta1, Tq≤Tq1, and Tk≤Tk1, the third three-way valve 202 is controlled so that the second fluid flows through the fuel cell auxiliary distributor, motor controller, and drive motor respectively, without needing to activate the second fan.

[0112] like Figure 4As shown, the control device for the power battery thermal management includes starting the third water pump 301, determining whether the power battery temperature Td is higher than a set threshold temperature Tmax1 based on the acquired power battery temperature Td, and if Td > Tmax1, adjusting the opening of the fourth three-way valve 304 and the fifth three-way valve 305 to allow the third flowing medium to flow through the battery cooler 306, and turning on the air conditioning compressor 403, the third fan 401, and the second electronic expansion valve 404 in the air conditioning and passenger compartment thermal management device to cool the battery cooler 306; if Td ≤ Tmax1... The system determines whether the power battery temperature Td is higher than its set threshold temperature Tmax2. If Td > Tmax2, it closes the second electronic expansion valve 404 and the air conditioning compressor 403, starts the second fan 203, and adjusts the fourth three-way valve 304 and the fifth three-way valve 305 to allow the third flowing medium to flow through the third radiator 302. If Td ≤ Tmax2, it determines whether the power battery temperature Td is lower than the operating temperature Tmin, and compares the temperature Tfo of the first flowing medium at the fuel cell outlet with the set threshold temperature Tf1, as well as the temperature Tfo with... The temperature Tdo of the third flowing medium at the power battery outlet is controlled. If Td ≥ Tmin, the opening of the fourth three-way valve 304 and the fifth three-way valve 305 is adjusted to allow the third flowing medium to flow through the battery cooler 306, while the fourth flowing medium of the air conditioning and passenger compartment thermal management device is prevented from flowing through the battery cooler 306. If Td < Tmin and Tfo ≤ Tdo, the water heating PTC 303 is activated, and the fourth three-way valve 304 is adjusted to allow the third flowing medium to flow through the water heating PTC 303 for heating. If Td < Tmin and Tdo < Tfo < Tf... 1. Start the two-way valve 107 and water-heated PTC303 of the fuel cell main heat dissipation management device, and adjust the fourth three-way valve 304 to allow the third flowing medium to flow through the water-heated PTC303 and plate heat exchanger 109, and heat the third flowing medium through the water-heated PTC303 and plate heat exchanger 109; if Td < Tmin and Tfo ≥ Tf1, start the two-way valve 107 and adjust the fourth three-way valve 304 to allow the third flowing medium to flow through the water-heated PTC303 and plate heat exchanger 109, and heat the third flowing medium through the plate heat exchanger 109;

[0113] like Figure 5As shown, the air conditioning and passenger compartment thermal management device includes, in response to a passenger compartment cooling demand command, starting and adjusting the speeds of the air conditioning compressor 403, the third fan 401, and the blower 102 according to a set threshold temperature and the acquired passenger compartment temperature, and adjusting the opening of the first electronic expansion valve 407; in response to a passenger compartment heating demand command, determining whether the temperature Tfo of the first flowing medium at the fuel cell outlet exceeds the threshold temperature Tn1 according to a set threshold temperature and the acquired passenger compartment temperature, and if Tfo > When Tn1, start the first water pump 108, adjust the opening of the first three-way valve 106 and the second three-way valve 105 to allow the first flowing medium to flow through the warm air core 101, and start the blower 102 to blow the heated air from the warm air core 101 into the passenger compartment; if Tfo≤Tn1, start the blower 102 and the air heater PTC405 to heat the passenger compartment, and adjust the opening of the first three-way valve 106 and the second three-way valve 105 to prevent the first flowing medium from flowing through the warm air core 101.

[0114] The basic principles of this disclosure have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this disclosure are merely examples and not limitations, and should not be considered as essential features of each embodiment of this disclosure. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the scope of this disclosure to the necessity of employing the aforementioned specific details for implementation.

[0115] In this disclosure, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The block diagrams of devices, apparatuses, devices, and systems involved in this disclosure are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as "comprising," "including," "having," etc., are open-ended terms meaning "including but not limited to," and are used interchangeably with them. The terms "or" and "and" as used herein refer to the terms "and / or," and are used interchangeably with them unless the context clearly indicates otherwise. The term "such as" as used herein refers to the phrase "such as but not limited to," and is used interchangeably with it.

[0116] Additionally, as used herein, the “or” used in a list of items beginning with “at least one” indicates a separate list, such that a list of, for example, “at least one of A, B, or C” means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). Furthermore, the word “exemplary” does not imply that the described example is preferred or better than other examples.

[0117] It should also be noted that in the systems and methods of this disclosure, the components or steps can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions to this disclosure.

[0118] Various changes, substitutions, and modifications can be made to the technology described herein without departing from the teachings defined by the appended claims. Furthermore, the scope of the claims of this disclosure is not limited to the specific aspects of the processes, machines, manufactures, events, means, methods, and actions described above. Currently existing or later-developed processes, machines, manufactures, events, means, methods, or actions that perform substantially the same function or achieve substantially the same result as the corresponding aspects described herein can be utilized. Therefore, the appended claims include such processes, machines, manufactures, events, means, methods, or actions within their scope.

[0119] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of this disclosure. Therefore, this disclosure is not intended to be limited to the aspects shown herein, but rather to be carried out within the widest scope consistent with the principles and novel features disclosed herein.

[0120] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this disclosure to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations therein.

Claims

1. A heat management system, characterized in that, include: Fuel cell main heat dissipation management device, fuel cell auxiliary heat dissipation and motor electronic control heat management device, power battery heat management device, and air conditioning and passenger compartment heat management device; The heat from the fuel cell main heat dissipation management device is supplied to the air conditioning and passenger compartment heat management device through the heating device. The fuel cell main heat dissipation management device includes a first water pump (108), a first three-way valve (106), a second three-way valve (105), and a heating core (101). When the passenger compartment needs to be heated, it is determined whether the temperature Tfo of the first flowing medium at the outlet of the fuel cell engine exceeds its threshold temperature Tn1. If Tfo > Tn1 and lasts for 30 seconds, the first water pump (108) is started, the opening of the first three-way valve (106) and the second three-way valve (105) are adjusted so that part of the first flowing medium of the fuel cell flows through the heating core (101), and the blower (102) is started to blow the air heated by the heating core (101) into the passenger compartment. The fuel cell auxiliary cooling and motor control thermal management device includes a second water pump (201), a third three-way valve (202), a second fan (203), and a second radiator (204). The power battery thermal management device includes a third radiator (302). The second radiator (204) and the third radiator (302) share the second fan. When any one of the fuel cell engine, drive motor, or motor controller starts working, the second water pump (201) is activated. The controller uses the data collected by the corresponding sensors from the fuel cell auxiliary cooling system. The inlet water temperature Tai, drive motor temperature Tq, and motor controller temperature Tk are used to determine whether they exceed their threshold temperatures Ta1, Tq1, and Tk1. If Tai > Ta1, Tq > Tq1, or Tk > Tk1 and this condition persists for 30 seconds, the second fan (203) is started. The opening degree of the third three-way valve (202), the speed of the second water pump (201), and the speed of the second fan (203) are adjusted based on the values ​​of Tai, Tq, and Tk. The second flowing medium in the fuel cell auxiliary heat dissipation and motor electronic control thermal management device is a mixed solution of water and ethylene glycol. A plate heat exchanger (109) is installed between the pipeline of the fuel cell main heat dissipation management device and the pipeline of the power battery heat management device. The fuel cell main heat dissipation management device is also equipped with a two-way valve (107). When the power battery needs to be heated, if the temperature of the first flowing medium of the fuel cell engine coolant is higher than the temperature of the third flowing medium of the power battery, the two-way valve (107) is opened so that the high temperature first flowing medium of the fuel cell engine device is heated by the low temperature third flowing medium of the power battery device in the plate heat exchanger (109). A battery cooler is installed between the pipes of the air conditioning and passenger compartment thermal management device and the pipes of the power battery thermal management device.

2. The heat management system according to claim 1, characterized in that, The heating system includes a blower, a heating core, an evaporator, and a PTC heater. The blower is used to blow air that has been heated by the heating core or the PTC heater and cooled by the evaporator into the passenger compartment.

3. The heat management system according to claim 2, characterized in that, The main heat dissipation management device for the fuel cell also includes a fuel cell, a first heat dissipation device, a two-way valve, and a heat exchanger. The first water pump is used to make the first flowing medium flow in the fuel cell main heat dissipation management device. Two pipelines are connected at the outlet of the fuel cell. One pipeline is connected to the inlet of the first three-way valve, and the other pipeline is connected to the inlet of the two-way valve. A heat exchanger is installed on the pipeline between the outlet of the two-way valve and the inlet of the first water pump. One outlet of the first three-way valve is connected to the inlet of the first water pump via a pipe, and the other outlet of the first three-way valve is connected to the inlet of the second three-way valve. A first heat dissipation device is installed on the pipe between one outlet of the second three-way valve and the inlet of the first water pump, and a warm air core is installed on the pipe between the other outlet of the second three-way valve and the inlet of the first water pump.

4. The heat management system according to claim 3, characterized in that, The first heat dissipation device includes a first heat sink and a first fan, wherein the first fan is an electric fan.

5. The heat management system according to claim 3, characterized in that, The fuel cell auxiliary heat dissipation and motor electronic control thermal management device includes a second water pump, a third three-way valve, a motor controller, a drive motor, a second radiator, and a second fan. The second water pump is used to make the second flowing medium flow in the fuel cell auxiliary radiator and motor electronic control thermal management device. One outlet of the third three-way valve is connected to the fuel cell auxiliary radiator inlet through a pipe. The other outlet of the third three-way valve is connected to the motor controller inlet through a pipe. The motor controller outlet is connected to the drive motor inlet through a pipe. The inlet of the third three-way valve is connected to the second water pump outlet through a pipe. The fuel cell auxiliary radiator outlet and the drive motor outlet are connected to the second radiator inlet through a pipe. The second radiator outlet is connected to the second water pump inlet through a pipe.

6. The heat management system according to claim 1, characterized in that, The power battery thermal management device includes a power battery, a third water pump, a water heating PTC, a fourth three-way valve, a fifth three-way valve, a heat exchanger, a third radiator, and a battery cooler. The third water pump is used to make the third flowing medium flow in the power battery thermal management device. The power battery outlet is connected to the inlet of the fourth three-way valve. A water-heated PTC is installed on the pipeline between one outlet of the fourth three-way valve and the inlet of the third water pump. The pipeline between the outlet of the water-heated PTC and the inlet of the third water pump is connected to the heat exchanger. The other outlet of the fourth three-way valve is connected to the inlet of the fifth three-way valve. A third radiator is installed on the pipeline between one outlet of the fifth three-way valve and the inlet of the third water pump. A battery cooler is installed on the pipeline between the other outlet of the fifth three-way valve and the inlet of the third water pump.

7. The heat management system according to claim 2, characterized in that, The air conditioning and passenger compartment thermal management device includes a condenser, an air conditioning compressor, a third fan, an evaporator, a PTC heater, a first electronic expansion valve, and a second electronic expansion valve. The evaporator, air conditioning compressor, condenser, and first electronic expansion valve are connected in sequence through pipes. The PTC heater is used to heat the passenger compartment, and the third fan is used to dissipate heat from the condenser. The outlet of the second electronic expansion valve is connected to the inlet of the battery cooler, and the inlet of the air conditioning compressor is connected to the outlet of the battery cooler.

8. The heat management system according to claim 1, characterized in that, The first flowing medium in the main heat dissipation management device of the fuel cell is fuel cell coolant; the second flowing medium in the auxiliary heat dissipation and motor control heat management device of the fuel cell is a mixed solution of water and ethylene glycol; the third flowing medium in the power battery heat management device is a mixed solution of water and ethylene glycol; and the fourth flowing medium in the air conditioning and passenger compartment heat management device is vehicle air conditioning refrigerant.

9. A control method for a heat management system, characterized in that, The management system applied to any one of claims 1 to 8 includes: The temperatures of the main heat dissipation management device of the fuel cell, the auxiliary heat dissipation and motor control thermal management device of the fuel cell, the power battery thermal management device, and the air conditioning and passenger compartment thermal management device are acquired respectively. Based on the acquired temperatures, the main heat dissipation management device of the fuel cell, the auxiliary heat dissipation and motor control thermal management device, the power battery thermal management device, and the air conditioning and passenger compartment thermal management device are controlled respectively.

10. The control method according to claim 9, characterized in that, The main heat dissipation management device for the fuel cell includes starting a first water pump, determining the temperature Tfi of the first flowing medium at the fuel cell inlet and the value of a set threshold temperature Tf2 based on acquired temperature data; if Tfi > Tf2, starting a first fan, controlling a first three-way valve to allow the first flowing medium to flow into the first radiator, and adjusting the opening of the first three-way valve and the speed of the first water pump and the first fan according to the value of temperature Tfi; if Tfi ≤ Tf2, controlling the first three-way valve to allow the first flowing medium to flow directly back to the fuel cell. The control device for the fuel cell auxiliary cooling system and the electric motor thermal management includes starting the second water pump; determining whether the acquired inlet temperature Tai of the fuel cell auxiliary cooling system, the drive motor temperature Tq, and the motor controller temperature Tk exceed the set threshold temperatures, wherein the threshold temperature corresponding to temperature Tai is Ta1, the threshold temperature corresponding to temperature Tq is Tq1, and the threshold temperature corresponding to temperature Tk is Tk1; if Tai > Ta1, or Tq > Tq1, or Tk > Tk1, the second flowing medium flows through the fuel cell auxiliary cooling system, the motor controller, and the drive motor respectively, and then flows into the second radiator, and the second fan is started to dissipate heat from the second radiator; the opening of the third three-way valve and the speed of the second water pump and the second fan are adjusted according to the magnitude of temperature Tai, temperature Tq, and temperature Tk; if Tai ≤ Ta1, Tq ≤ Tq1, and Tk ≤ Tk1, the third three-way valve is controlled so that the second flowing medium flows through the fuel cell auxiliary cooling system, the motor controller, and the drive motor respectively, and the second fan is not started; The control device for the power battery thermal management includes starting the third water pump, determining whether the power battery temperature Td is higher than a set threshold temperature Tmax1 based on the acquired power battery temperature Td, and if Td > Tmax1, adjusting the opening of the fourth and fifth three-way valves to allow the third flowing medium to flow through the battery cooler, and turning on the air conditioning compressor, the third fan, and the second electronic expansion valve in the air conditioning and passenger compartment thermal management device to cool the battery cooler; if Td ≤ Tmax1, determining whether the power battery temperature Td is higher than its set threshold temperature Tmax2, and if Td > Tmax2, closing the second electronic expansion valve and the air conditioning compressor, the third fan, and the second electronic expansion valve. Adjust the compressor, start the second fan, and adjust the fourth and fifth three-way valves to allow the third flowing medium to flow through the third radiator; if Td≤Tmax2, determine whether the power battery temperature Td is lower than the operating temperature Tmin, and compare the temperature Tfo of the first flowing medium at the fuel cell outlet with the set threshold temperature Tf1 and the temperature Tfo with the temperature Tdo of the third flowing medium at the power battery outlet; if Td≥Tmin, adjust the opening of the fourth and fifth three-way valves to allow the third flowing medium to flow through the battery cooler, and control the fourth flowing medium of the air conditioning and passenger compartment thermal management device to not flow through the battery cooler. If Td < Tmin and Tfo ≤ Tdo, then start the water-heated PTC and adjust the fourth three-way valve to allow the third flowing medium to flow through the water-heated PTC for heating; if Td < Tmin and Tdo < Tfo < Tf1, start the two-way valve of the fuel cell main heat dissipation management device and the water-heated PTC, and adjust the fourth three-way valve to allow the third flowing medium to flow through the water-heated PTC and the plate heat exchanger, and heat the third flowing medium through the water-heated PTC and the plate heat exchanger. If Td < Tmin and Tfo ≥ Tf1, start the two-way valve and adjust the fourth three-way valve to allow the third flowing medium to flow through the water heating PTC and plate heat exchanger, and heat the third flowing medium through the plate heat exchanger. The air conditioning and passenger compartment thermal management device includes, in response to a passenger compartment cooling demand command, starting and adjusting the speed of the air conditioning compressor, the third fan and the blower according to a set threshold temperature and the acquired passenger compartment temperature, and adjusting the opening of the first electronic expansion valve; in response to a passenger compartment heating demand command, determining whether the temperature Tfo of the first flowing medium at the fuel cell outlet exceeds the threshold temperature Tn1 according to a set threshold temperature and the acquired passenger compartment temperature; if Tfo > Tn1, starting the first water pump, adjusting the opening of the first three-way valve and the second three-way valve to allow the first flowing medium to flow through the warm air core, and starting the blower to blow the air heated by the warm air core into the passenger compartment; If Tfo≤Tn1, start the blower and PTC heater to heat the passenger compartment, and adjust the opening of the first three-way valve and the second three-way valve to prevent the first flow medium from flowing through the heater core.

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