A heat management method and device for a liquid hydrogen heavy truck heat management system

Abstract

The application discloses a kind of liquid hydrogen heavy truck heat management system heat management method, device, comprising: detecting the real-time temperature of target equipment in liquid hydrogen heavy truck heat management system, wherein target equipment at least includes one of the following: hydrogen fuel engine, cab heater core, power battery;When the real-time temperature of target equipment meets preset temperature condition, the cooling liquid circulation flow path in liquid hydrogen heavy truck heat management system is adjusted to control liquid hydrogen heavy truck heat management system to enter corresponding heat management mode.The application utilizes hydrogen fuel engine waste heat by adjusting multiple control valves, can meet the heating of power battery and the heating demand of cab;By setting up cold recovery branch, liquid hydrogen in liquid hydrogen vaporization device is quickly vaporized, and the cooling of cooling liquid itself is also accelerated by using vaporization endothermic process, thereby reducing the heat dissipation load of engine heat dissipation module, reducing the energy consumption of whole vehicle, improving economy.

Description

Technical Field

[0001] This application relates to the field of automotive thermal management technology, specifically to a thermal management method and apparatus for a liquid hydrogen heavy-duty truck thermal management system. Background Technology

[0002] Liquid hydrogen, with its high hydrogen storage density and high energy density, is a highly advantageous clean energy source. Liquid hydrogen heavy-duty trucks, as one application scenario for liquid hydrogen, are gradually gaining public attention due to their advantages such as low emissions, low energy consumption, and strong power. The thermal management system of a hydrogen fuel cell engine ensures that the engine operates at a suitable temperature. The rational design and optimization of the thermal management system not only improves the performance and thermal efficiency of the hydrogen fuel cell engine but also plays a crucial role in the efficient and safe operation of the entire vehicle.

[0003] In related technologies, the cooling requirements of hydrogen fuel cell engines are mostly met by using coolant for heat dissipation. The coolant carries the large amount of heat generated by the engine during operation to the radiator, allowing cooling air to flow rapidly on the radiator surface to cool the engine. For the needs of heating the heater or battery, the coolant is heated by inputting power to a PTC (Positive Temperature Coefficient) heater. The heated coolant then flows through the heater core or the power battery to achieve the purpose of heating the heater or battery.

[0004] However, in existing technologies, the cooling and heating requirements of the entire system are unrelated and have a low degree of coupling. During the cooling process, the working heat of the hydrogen fuel cell engine cannot be fully utilized, and waste heat is directly emitted into the atmosphere and wasted. At the same time, for needs such as cab heating or battery heating, additional electrical energy is usually required to heat the PTC heater, which leads to problems such as increased energy consumption and reduced driving range of the vehicle. Summary of the Invention

[0005] In view of the above problems, this application is made to provide a thermal management method and device for a liquid hydrogen heavy truck thermal management system, so as to reduce the cooling cycle load of the hydrogen fuel engine, reduce the heating energy consumption of the heating system and the power battery, while meeting the cooling and heating requirements of the system, thereby achieving the technical effects of reducing the vehicle's power consumption and energy consumption, increasing the driving range, and improving the vehicle's economy.

[0006] According to a first aspect of this application, a thermal management method for a liquid hydrogen heavy-duty truck thermal management system is provided, the thermal management method comprising:

[0007] The real-time temperature of the target equipment in the liquid hydrogen heavy truck thermal management system is detected, wherein the target equipment includes at least one of the following: hydrogen fuel engine, cab heating core, power battery, and liquid hydrogen vaporization device;

[0008] When the real-time temperature of the target device meets the preset temperature conditions, the coolant circulation path in the liquid hydrogen heavy truck thermal management system is adjusted to control the liquid hydrogen heavy truck thermal management system to enter the corresponding thermal management mode.

[0009] Optionally, the liquid hydrogen heavy-duty truck thermal management system is equipped with control valves and multiple pipelines for the flow of the coolant. The control valves include a first control valve, a second control valve, a third control valve, and a fourth control valve. The first and second control valves are both two-way valves, the third control valve is a three-way valve, and the fourth control valve is a four-way valve.

[0010] The thermal management method further includes:

[0011] A branch of the first water circuit of the hydrogen fuel cell engine is connected to the first valve port of the fourth control valve via the first control valve, and a second branch of the first water circuit of the hydrogen fuel cell engine is connected to one end of the battery heat exchanger in the liquid hydrogen heavy truck thermal management system via the second control valve.

[0012] The second water circuit of the hydrogen fuel cell engine is connected to one end of the FCE cooling module in the liquid hydrogen heavy truck thermal management system, and the other end of the FCE cooling module is connected to the first valve port of the third control valve.

[0013] Connect branch one of the third water circuit of the hydrogen fuel engine to the fourth valve port of the fourth control valve; connect branch two of the third water circuit of the hydrogen fuel engine to the second valve port of the third control valve; connect branch three of the third water circuit of the hydrogen fuel engine to the other end of the battery heat exchanger; connect branch four of the third water circuit of the hydrogen fuel engine to one end of the heater of the liquid hydrogen vaporization device; and connect the other end of the heater of the liquid hydrogen vaporization device to the third valve port of the third control valve.

[0014] Optionally, the thermal management method further includes:

[0015] One end of the water pipe of the cab heater core is connected to the PTC heater in the liquid hydrogen heavy truck thermal management system, and then connected to the second valve port of the fourth control valve.

[0016] The other end of the water pipe of the cab heating core is connected to the third valve port of the fourth control valve after passing through the heating water pump in the liquid hydrogen heavy truck thermal management system.

[0017] One end of the power battery's water pipe is connected to one end of the battery heat exchanger via the battery PTC heater and battery water pump in the liquid hydrogen heavy truck thermal management system, and the other end of the power battery's water pipe is connected to the other end of the battery heat exchanger.

[0018] Optionally, the thermal management mode includes a cooling mode, and the thermal management method includes:

[0019] When the real-time temperature of the hydrogen fuel cell engine is not less than the preset temperature T1, the first valve port of the third control valve and the second valve port of the third control valve are connected to enable the liquid hydrogen heavy truck thermal management system to enter the cooling mode.

[0020] Optionally, the thermal management mode includes a first heating mode, and the thermal management method includes:

[0021] When the real-time temperature of the hydrogen fuel cell engine is less than the preset temperature T2, and the real-time temperature of the cab heater core is less than the set temperature T... H When the first control valve is closed, the second valve port and the third valve port of the fourth control valve are connected, and the warm air water pump and the warm air PTC heater are turned on, so that the liquid hydrogen heavy truck thermal management system enters the first heating mode.

[0022] Optionally, the thermal management mode includes a second heating mode, and the thermal management method includes:

[0023] When the real-time temperature of the hydrogen fuel cell engine is not less than the set temperature T2, and the real-time temperature of the cab heater core is less than the set temperature T... H At that time, the first control valve is connected, the first and second valve ports of the fourth control valve are connected, the third and fourth valve ports of the fourth control valve are connected, and the warm air water pump and the warm air PTC heater are shut down, so that the liquid hydrogen heavy truck thermal management system enters the second heating mode.

[0024] Optionally, the thermal management mode includes a first heating mode, and the thermal management method includes:

[0025] When the real-time temperature of the hydrogen fuel cell engine is lower than the preset temperature T3, and the real-time temperature of the power battery is lower than the set temperature T... B When the second control valve is closed, the battery water pump and the battery PTC heater are turned on, so that the liquid hydrogen heavy truck thermal management system enters the first heating mode.

[0026] Optionally, the thermal management mode includes a second heating mode, and the thermal management method includes:

[0027] When the real-time temperature of the hydrogen fuel cell engine is not lower than the set temperature T3, and the real-time temperature of the power battery is lower than the set temperature T... B When the second control valve is connected, the battery water pump is turned on and the battery PTC heater is turned off, so that the liquid hydrogen heavy truck thermal management system enters the second heating mode.

[0028] Optionally, the thermal management mode includes a third heating mode, and the thermal management method includes:

[0029] When the real-time temperature of the hydrogen fuel engine is not less than the set temperature T4, the first valve port of the third control valve and the third valve port of the third control valve are connected to enable the liquid hydrogen heavy truck thermal management system to enter the third heating mode, wherein the coolant can flow through the liquid hydrogen vaporization device, and the coolant is cooled by the liquid hydrogen vaporization in the liquid hydrogen vaporization device after absorbing heat.

[0030] According to a second aspect of this application, a thermal management device for a liquid hydrogen heavy-duty truck thermal management system is provided, the thermal management device comprising:

[0031] The detection unit is used to detect the real-time temperature of the target equipment in the liquid hydrogen heavy truck thermal management system, wherein the target equipment includes at least one of the following: hydrogen fuel engine, cab heating core, power battery, and liquid hydrogen vaporization device;

[0032] The control unit is used to control the liquid hydrogen heavy truck thermal management system to enter the corresponding thermal management mode by adjusting the coolant circulation path in the liquid hydrogen heavy truck thermal management system when the real-time temperature of the target equipment meets the preset temperature conditions.

[0033] According to a third aspect of this application, an electronic device is provided, comprising: a processor; and a memory arranged to store computer-executable instructions, which, when executed, cause the processor to perform a thermal management method of a liquid hydrogen heavy-duty truck thermal management system as described in any of the preceding claims.

[0034] According to a fourth aspect of this application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores one or more programs, which, when executed by a processor, implement the thermal management method of the liquid hydrogen heavy truck thermal management system as described in any of the preceding claims.

[0035] As can be seen from the above, at least one technical solution adopted in the embodiments of this application can achieve the following:

[0036] Beneficial effects:

[0037] The real-time temperature of the target device in the liquid hydrogen heavy-duty truck thermal management system is detected. When the real-time temperature of the target device meets the preset temperature conditions, the liquid hydrogen heavy-duty truck thermal management system is controlled to enter the corresponding thermal management mode by adjusting the coolant circulation path in the system. Simultaneously, this application enhances the correlation between the cooling and heating functions of the entire vehicle system by setting six thermal management modes. By adjusting the control valves in the system, a waste heat utilization branch and a liquid hydrogen vaporization cold energy recovery branch are formed. This application not only enables the full recovery and utilization of the exhaust heat from the hydrogen fuel cell engine to meet the cooling and heating requirements of the entire vehicle system, but also reduces the load on the engine cooling cycle, as well as the energy consumption of the heating system and the power battery, thereby reducing the vehicle's power consumption and energy usage, increasing the driving range, and improving the overall vehicle economy.

[0038] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0039] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0040] Figure 1 This is a flowchart illustrating the thermal management method of a liquid hydrogen heavy-duty truck thermal management system in one embodiment of this application.

[0041] Figure 2 This is a schematic diagram of the structure of a liquid hydrogen heavy-duty truck thermal management system in one embodiment of this application;

[0042] Figure 3 This is a schematic diagram of the thermal management device of the liquid hydrogen heavy truck thermal management system in one embodiment of this application;

[0043] Figure 4 This is a schematic diagram of the structure of an electronic device in one embodiment of this application;

[0044] Figure 5 This is a schematic diagram of the structure of a computer-readable storage medium in one embodiment of this application.

[0045] In the diagram: 201, Hydrogen fuel cell engine; 202, FCE water temperature sensor; 203, FCE heat dissipation module; 204, Third control valve; 205, Liquid hydrogen vaporization device; 206, Heater of liquid hydrogen vaporization device; 207, Cab heater core; 208, Heater water temperature sensor; 209, Heater PTC heater; 210, Fourth control valve; 211, Heater water pump; 212, First control valve; 213, Power battery; 214, Battery water temperature sensor; 215, Battery PTC heater; 216, Battery water pump; 217, Battery heat exchanger; 218, Second control valve; Q 31 Indicates the first valve port of the third control valve, Q 32 This indicates the second valve port of the third control valve, Q. 33 This indicates the third valve port of the third control valve, Q. 41 This indicates the first valve port of the fourth control valve, Q. 42 This indicates the second valve port of the fourth control valve, Q. 43 This indicates the third valve port of the fourth control valve, Q. 44 This indicates the fourth valve port of the fourth control valve. Detailed Implementation

[0046] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0047] As mentioned earlier, in the existing technical solutions, the cooling and heating requirements of the vehicle system are not related to each other. During the cooling process, the heat generated by the hydrogen fuel cell engine is wasted. At the same time, in order to meet the various heating requirements, additional electrical energy is needed to power the PTC heater, which increases the energy consumption of the vehicle and reduces the driving range of the vehicle.

[0048] Based on this, embodiments of this application propose a thermal management method and apparatus for a liquid hydrogen heavy-duty truck thermal management system, in order to reduce the cooling cycle load of the hydrogen fuel cell engine, reduce the heating energy consumption of the heating system and the power battery, while meeting the cooling and heating requirements of the system, thereby achieving the technical effects of reducing the vehicle's power consumption and energy consumption, increasing the driving range, and improving the vehicle's economy.

[0049] The technical concept of this application lies in two aspects. First, by adjusting multiple control valves in the liquid hydrogen heavy-duty truck thermal management system, the waste heat generated during the operation of the hydrogen fuel cell engine is fully utilized to meet the heating needs of the power battery and the cab, while simultaneously reducing the heat dissipation load on the hydrogen fuel cell engine's cooling module and lowering the overall vehicle system's energy consumption. Second, this application is applicable to thermal management systems equipped with hydrogen fuel cell engines, utilizing the heat absorption characteristics of liquid hydrogen vaporization to cool the coolant through "cold energy recovery," thereby achieving cooling of the hydrogen fuel cell engine. Furthermore, this application integrates six thermal management modes, not only improving the circulation path of traditional PTC heating and cooling systems but also forming a waste heat utilization branch and a liquid hydrogen vaporization cold energy recovery branch, thereby enhancing the correlation between the cooling and heating functions of the entire vehicle system.

[0050] It is worth noting that the liquid hydrogen heavy truck in this application refers to a heavy truck that uses liquid hydrogen as a power fuel, and the engine in this application is also a hydrogen fuel engine. Therefore, the thermal management method described in this application is applicable to the thermal management system of liquid hydrogen heavy trucks.

[0051] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0052] Figure 1 This is a flowchart illustrating the thermal management method of a liquid hydrogen heavy-duty truck thermal management system in one embodiment of this application. Figure 2 This is a schematic diagram of the structure of a liquid hydrogen heavy truck thermal management system in one embodiment of this application.

[0053] One embodiment of this application proposes a thermal management method for a liquid hydrogen heavy-duty truck thermal management system, used in a liquid hydrogen heavy-duty truck thermal management system, such as... Figure 2 As shown, the liquid hydrogen heavy-duty truck thermal management system includes a hydrogen fuel cell pipeline water system area, a heater core pipeline water system area, and a power battery pipeline water system area, and these multiple pipeline water system areas are interconnected. The thermal management method described in this application can be used to achieve thermal management of this liquid hydrogen heavy-duty truck thermal management system. Since hydrogen, when used as a fuel for the internal combustion engine of a new energy vehicle, easily achieves lean combustion, it has the advantages of low pollutant emissions and high thermal efficiency. Therefore, preferably, the engine in the liquid hydrogen heavy-duty truck thermal management system described in this application is a hydrogen fuel cell engine. In this embodiment, the coolant in the liquid hydrogen heavy-duty truck thermal management system refers to a coolant with antifreeze properties.

[0054] like Figure 1 As shown, the thermal management method includes the following steps S110 to S120:

[0055] Step S110: Detect the real-time temperature of the target equipment in the liquid hydrogen heavy truck thermal management system, wherein the target equipment includes at least one of the following: hydrogen fuel engine, cab heater core, power battery, and liquid hydrogen vaporization device.

[0056] In this embodiment, as Figure 2 As shown, the target equipment includes a hydrogen fuel cell engine 201, a cab heater core 207, a power battery 213 (BAT, BATTERY), and a liquid hydrogen vaporization device 205. The liquid hydrogen heavy-duty truck thermal management system also includes an FCE water temperature sensor 202 (FCE, Fuel Cell Engine) connected to the hydrogen fuel cell engine 201, a heater water temperature sensor 208 connected to the cab heater core 207, a battery water temperature sensor 214 connected to the power battery 213, and a water temperature sensor connected to the liquid hydrogen vaporization device (not shown in the figure for simplicity). It can be understood that the above water temperature sensors are used to detect the real-time temperature of their respective hydrogen fuel cell engine, cab heater core, power battery, and liquid hydrogen vaporization device.

[0057] Step S120: When the real-time temperature of the target device meets the preset temperature conditions, the coolant circulation path in the liquid hydrogen heavy truck thermal management system is adjusted to control the liquid hydrogen heavy truck thermal management system to enter the corresponding thermal management mode.

[0058] Specifically, the circulation path of the coolant in the liquid hydrogen heavy truck thermal management system can be controlled by adjusting the opening and closing states of the first control valve 212, the second control valve 218, the third control valve 204, and the fourth control valve 210 respectively, so as to enter the corresponding thermal management mode.

[0059] In this embodiment, the thermal management modes include: a cooling mode (FCE heat dissipation module cooling), a first heating mode (PTC heating), a second heating mode (engine waste heat heating), a first heating mode (PTC heating), a second heating mode (engine waste heat heating), and a third heating mode (liquid hydrogen vaporization cold energy recovery). Therefore, this application integrates six thermal management modes, not only improving the circulation path of the traditional PTC heating and cooling system, but also forming a waste heat utilization branch and a liquid hydrogen vaporization cold energy recovery branch, thereby enhancing the correlation between the cooling and heating functions of the entire vehicle system and saving energy consumption of the entire vehicle.

[0060] In one embodiment of this application, such as Figure 2As shown, the liquid hydrogen heavy truck thermal management system is equipped with control valves and multiple pipelines for the flow of the coolant. The control valves include a first control valve 212, a second control valve 218, a third control valve 204, and a fourth control valve 210. The first control valve 212 and the second control valve 218 are both two-way valves, the third control valve 204 is a three-way valve, and the fourth control valve 210 is a four-way valve.

[0061] The thermal management method further includes: in the hydrogen fuel engine pipeline water circuit area, connecting a branch of the first water circuit of the hydrogen fuel engine 201 through the first control valve 212 to the first valve port Q of the fourth control valve. 41 The first water circuit of the hydrogen fuel cell engine 201 is connected to one end of the battery heat exchanger 217 in the liquid hydrogen heavy-duty truck thermal management system via the second control valve 218. The second water circuit of the hydrogen fuel cell engine 201 is connected to one end of the FCE heat dissipation module 203 in the liquid hydrogen heavy-duty truck thermal management system, and the other end of the FCE heat dissipation module 203 is connected to the first valve port Q of the third control valve. 31 Connect the branch of the third water circuit of the hydrogen fuel cell engine 201 to the fourth valve port Q of the fourth control valve. 44 Connect the second branch of the third water circuit of the hydrogen fuel cell engine 201 to the second valve port Q of the third control valve. 32 Connect the third branch of the third water channel of the hydrogen fuel cell engine 201 to the other end of the battery heat exchanger 217.

[0062] In this embodiment, the thermal management system also includes a liquid hydrogen vaporization device 205 and a heater 206 for the liquid hydrogen vaporization device. A branch of the third water path of the hydrogen fuel cell engine 201 is connected to one end of the heater 206 of the liquid hydrogen vaporization device in the liquid hydrogen heavy-duty truck thermal management system, and the other end of the heater 206 is connected to the third valve port Q of the third control valve. 33 connect.

[0063] Furthermore, the thermal management method further includes: in the water circuit area of ​​the heating core duct, one end of the water circuit of the cab heating core 207 is connected to the second valve port Q of the fourth control valve after passing through the PTC heater 209 in the liquid hydrogen heavy truck thermal management system. 42 The other end of the water pipe of the cab heater core 207 is connected to the third valve port Q of the fourth control valve via the heater water pump 211 in the liquid hydrogen heavy truck thermal management system. 43Connection; In the power battery pipeline water circuit area, one end of the pipeline water circuit of the power battery 213 is connected to one end of the battery heat exchanger 217 via the battery PTC heater 215 and battery water pump 216 in the liquid hydrogen heavy truck thermal management system, and the other end of the pipeline water circuit of the power battery 213 is connected to the other end of the battery heat exchanger 217. It is understood that... Figure 2 The illustrations of the connection methods of pipelines and water circuits and the circulation path of coolant are for the purpose of explanation and simplification only, and should not be regarded as limitations on this application.

[0064] Furthermore, in one embodiment of this application, the thermal management mode includes a cooling mode, i.e., using the FCE heat dissipation module to cool the hydrogen fuel cell engine. The thermal management method includes: when the real-time temperature of the hydrogen fuel cell engine is not less than a preset temperature T1, controlling the first valve port Q of the third control valve. 31 The second valve port Q of the third control valve 32 The connection is established to allow the liquid hydrogen heavy-duty truck thermal management system to enter cooling mode. In this circulating flow path, the coolant flows out from the hydrogen fuel engine pipeline, passes through the FCE heat dissipation module 203 for cooling, and then flows back to the hydrogen fuel engine pipeline, thereby realizing the cooling function of the hydrogen fuel engine.

[0065] In one embodiment of this application, the thermal management mode includes a first heating mode, namely, using a PTC heater to achieve cab heating function. The thermal management method includes: when the real-time temperature of the hydrogen fuel engine is less than a preset temperature T2, and the real-time temperature of the cab heating core is less than a set temperature T... H At that time, the first control valve 212 is closed, and the second valve port Q of the fourth control valve is closed. 42 The third valve port of the fourth control valve is connected to Q. 43 The first valve port Q of the fourth control valve 41 and the fourth valve port Q of the fourth control valve 44 The system is connected, and simultaneously the heater water pump 211 and the heater PTC heater 209 are turned on to put the liquid hydrogen heavy truck thermal management system into the first heating mode. In this embodiment, the coolant flows out from the water pipe of the cab heater core and flows sequentially through the heater water pump 211 and the third valve port Q of the fourth control valve. 43 The second valve port Q of the fourth control valve 42The PTC heater 209 is used to heat the coolant, which then flows back to the cab heating core 207. The function of the heating core is to power the air conditioning heating system to increase the temperature inside the vehicle. In this embodiment, the heated coolant can flow back to the heating core, thereby achieving the heating function of the cab.

[0066] In one embodiment of this application, the thermal management mode includes a second heating mode, namely, using waste heat from the hydrogen fuel engine to heat the cab. The thermal management method includes: when the real-time temperature of the hydrogen fuel engine is not less than a set temperature T2, and the real-time temperature of the cab heating core is less than the set temperature T... H At that time, the first control valve 212 is connected, and the first valve port Q of the fourth control valve is connected. 41 and the second valve port Q of the fourth control valve 42 Connecting to the third valve port Q of the fourth control valve 43 and the fourth valve port Q of the fourth control valve 44 The system connects and controls the shut-off of the heater water pump 211 and the heater PTC heater 209, so that the liquid hydrogen heavy truck thermal management system enters the second heating mode. In this circulation flow path, the coolant in the hydrogen fuel engine pipeline flows sequentially through the first control valve 212 and the first valve port Q of the fourth control valve. 41 and the second valve port Q of the fourth control valve 42 The PTC heater 209 and the cab heater core 207 are mentioned. After heat exchange occurs in the cab heater core 207, the air flows through the heater pump 211 and the third valve port Q of the fourth control valve. 43 and the fourth valve port Q of the fourth control valve 44 Then, the heat flows back to the pipeline of the hydrogen fuel engine to achieve the heating function of the cab. This circulation path is one of the branches for the utilization of waste heat from the hydrogen fuel engine.

[0067] When the ambient temperature is low, in order to enable the vehicle's power battery to charge and discharge at an efficient operating temperature, it is necessary to heat the power battery to reach a certain temperature. Therefore, in the embodiments of this application, the thermal management mode includes a first heating mode, that is, using a PTC heater to heat the power battery.

[0068] The thermal management method includes: when the real-time temperature of the hydrogen fuel cell engine is lower than a preset temperature T3, and the real-time temperature of the power battery is lower than a set temperature T... BWhen the second control valve 218 is closed, the battery water pump 216 and the battery PTC heater 215 are simultaneously turned on, so that the liquid hydrogen heavy truck thermal management system enters the first heating mode. The coolant from the power battery outlet flows sequentially through the battery heat exchanger 217, the battery water pump 216, and the battery PTC heater 215, and is heated by the battery PTC heater 215. The heated coolant then flows back to the power battery, realizing the battery heating function.

[0069] In one embodiment of this application, the thermal management mode includes a second heating mode, and the thermal management method includes: when the real-time temperature of the hydrogen fuel cell engine is not less than a set temperature T3, and the real-time temperature of the power battery is less than a set temperature T... B When the second control valve 218 is connected, the battery water pump 216 is turned on and the battery PTC heater 215 is turned off, so that the liquid hydrogen heavy truck thermal management system enters the second heating mode. In this circulating flow path, the coolant from the hydrogen fuel engine outlet (i.e., the third branch of the third water path) passes through the battery heat exchanger 217, where it exchanges heat with the coolant in the power battery pipeline, and then flows back to the hydrogen fuel engine pipeline through the second control valve 218; similarly, after the coolant of the power battery exchanges heat with the coolant of the hydrogen fuel engine in the battery heat exchanger 217, it enters the power battery 213 through the battery water pump 216 and the battery PTC heater 215, and heats the power battery, thereby realizing the battery heating function. This is the second branch for the utilization of waste heat from the hydrogen fuel engine.

[0070] Furthermore, the engine in the liquid hydrogen heavy-duty truck thermal management system is a hydrogen fuel cell engine, and the system is also equipped with a liquid hydrogen vaporization device, such as... Figure 2 As shown, the liquid hydrogen vaporization device 205 is connected to the heater 206 of the liquid hydrogen vaporization device. The liquid hydrogen vaporization device 205 is also provided with a liquid hydrogen inlet and a hydrogen outlet.

[0071] In this embodiment of the application, the thermal management mode includes a third heating mode, which utilizes liquid hydrogen vaporization to absorb heat from the coolant in order to cool the coolant and thus achieve the function of cooling the hydrogen fuel engine.

[0072] The thermal management method includes: when the real-time temperature of the hydrogen fuel cell engine is not less than the set temperature T4, controlling the first valve port Q of the third control valve. 31 and the third valve port Q of the third control valve 33The system is connected to allow the liquid hydrogen heavy-duty truck thermal management system to enter a third heating mode, in which the coolant can flow through the liquid hydrogen vaporization device 205, and the coolant is cooled by absorbing heat from the vaporization of liquid hydrogen in the liquid hydrogen vaporization device 205. That is, as the coolant flows through the liquid hydrogen vaporization device, the liquid hydrogen vaporizes into hydrogen gas, requiring the coolant to absorb heat from the coolant (while the coolant absorbs the "coldness" of the vaporized liquid hydrogen). Therefore, in the liquid hydrogen vaporization device, the liquid hydrogen can absorb heat from the coolant for heating, thereby cooling the coolant. Afterwards, the coolant passes through the third valve port Q of the third control valve. 33 The first valve port Q of the third control valve 31 After the FCE heat dissipation module 203, the energy flows back to the hydrogen fuel engine to cool it. This circulation path is the "cold energy recovery" branch.

[0073] Furthermore, it is worth noting that the cooling process of the coolant in the liquid hydrogen vaporization device is not independent. Those skilled in the art will understand that during the "cold energy recovery" process, the coolant can also pass through the FCE heat dissipation module and be cooled by the FCE heat dissipation module.

[0074] In another embodiment of this application, when the real-time temperature of the hydrogen fuel cell engine is lower than the set temperature T4, the first valve port Q31 and the third valve port Q33 of the third control valve are connected. Simultaneously, the heater of the liquid hydrogen vaporization device is turned on, directly heating the coolant in the liquid hydrogen vaporization device to ensure smooth vaporization of the liquid hydrogen. The heater of the liquid hydrogen vaporization device also promotes the vaporization of liquid hydrogen; that is, the heater of the liquid hydrogen vaporization device can compensate for insufficient residual heat in the engine coolant, thereby accelerating the "cold energy recovery" of the coolant. Of course, it should be understood that the various thermal management modes in this application should not be considered as limitations on this application, and the thermal management modes can be adjusted and set according to specific usage scenarios.

[0075] Therefore, in this "cold energy recovery" branch, the coolant can not only help the liquid hydrogen in the liquid hydrogen vaporization device to complete vaporization, but also accelerate its own cooling by utilizing the heat absorption process of vaporization, thereby cooling down the hydrogen fuel engine.

[0076] Therefore, compared with traditional technical solutions, the thermal management method of the liquid hydrogen heavy truck thermal management system can achieve the following functions:

[0077] First, the waste heat from the hydrogen fuel cell engine is used to heat the air in the cab, reducing heating power consumption and decreasing the heat dissipation load on the engine. Second, the waste heat from the engine is used to heat the battery to operating temperature, reducing overall vehicle power consumption and decreasing the heat dissipation load on the engine. Third, since liquid hydrogen fuel needs to be vaporized before it can be used in the engine, this application introduces the engine's coolant into a liquid hydrogen vaporization device, using the engine's waste heat to heat the liquid hydrogen and aid in the vaporization process. The cooled coolant is then returned to the engine, thus achieving the engine's cooling function.

[0078] This application also provides a thermal management device 300 for a liquid hydrogen heavy-duty truck thermal management system, used in the liquid hydrogen heavy-duty truck thermal management system, such as... Figure 3 As shown, the thermal management device 300 includes:

[0079] The detection unit 310 is used to detect the real-time temperature of the target equipment in the liquid hydrogen heavy truck thermal management system, wherein the target equipment includes at least one of the following: a hydrogen fuel engine, a cab heater core, a power battery, and a liquid hydrogen vaporization device.

[0080] In this embodiment, as Figure 2 As shown, the target equipment includes a hydrogen fuel cell engine 201, a cab heater core 207, a power battery 213 (BAT, BATTERY), and a liquid hydrogen vaporization device 205. The liquid hydrogen heavy-duty truck thermal management system also includes an FCE water temperature sensor 202 (FCE, Fuel Cell Engine) connected to the hydrogen fuel cell engine 201, a heater water temperature sensor 208 connected to the cab heater core 207, a battery water temperature sensor 214 connected to the power battery 213, and a water temperature sensor connected to the liquid hydrogen vaporization device. It can be understood that the above water temperature sensors are used to detect the real-time temperature of their respective hydrogen fuel cell engine, cab heater core, power battery, and liquid hydrogen vaporization device.

[0081] The control unit 320 is used to control the liquid hydrogen heavy truck thermal management system to enter the corresponding thermal management mode by adjusting the coolant circulation path in the liquid hydrogen heavy truck thermal management system when the real-time temperature of the target equipment meets the preset temperature conditions.

[0082] Specifically, the circulation path of the coolant in the liquid hydrogen heavy-duty truck thermal management system can be controlled by adjusting the opening and closing states of the first control valve 212, the second control valve 218, the third control valve 204, and the fourth control valve 210, respectively, and the corresponding thermal management modes can be entered. In this embodiment, the thermal management modes include: cooling mode (FCE heat dissipation module cooling), first heating mode (PTC heating), second heating mode (hydrogen fuel engine waste heat heating), first heating mode (PTC heating), second heating mode (hydrogen fuel engine waste heat heating), and third heating mode (liquid hydrogen vaporization cold energy recovery). Thus, this application integrates six thermal management modes, not only improving the circulation path of the traditional PTC heating and cooling system, but also forming a waste heat utilization branch and a liquid hydrogen vaporization cold energy recovery branch, thereby enhancing the correlation between the cooling and heating functions of the entire vehicle system and saving energy consumption of the entire vehicle.

[0083] In one embodiment of this application, the liquid hydrogen heavy truck thermal management system is provided with control valves and multiple pipelines for the flow of the coolant. The control valves include a first control valve, a second control valve, a third control valve, and a fourth control valve. The first control valve and the second control valve are both two-way valves, the third control valve is a three-way valve, and the fourth control valve is a four-way valve.

[0084] A branch of the first water circuit of the hydrogen fuel cell engine is connected to the first port of the fourth control valve after passing through the first control valve. A branch of the first water circuit of the hydrogen fuel cell engine is connected to one end of the battery heat exchanger in the liquid hydrogen heavy-duty truck thermal management system after passing through the second control valve. A second water circuit of the hydrogen fuel cell engine is connected to one end of the FCE heat dissipation module in the liquid hydrogen heavy-duty truck thermal management system, and the other end of the FCE heat dissipation module is connected to the first port of the third control valve. A branch of the third water circuit of the hydrogen fuel cell engine is connected to the fourth port of the fourth control valve. A branch of the third water circuit of the hydrogen fuel cell engine is connected to the second port of the third control valve. A branch of the third water circuit of the hydrogen fuel cell engine is connected to the other end of the battery heat exchanger. A branch of the third water circuit of the hydrogen fuel cell engine is connected to one end of the heater of the liquid hydrogen vaporization device in the liquid hydrogen heavy-duty truck thermal management system, and the other end of the heater of the liquid hydrogen vaporization device is connected to the third port of the third control valve.

[0085] One end of the water pipe of the cab heater core is connected to the second valve port of the fourth control valve after passing through the PTC heater in the liquid hydrogen heavy truck thermal management system. The other end of the water pipe of the cab heater core is connected to the third valve port of the fourth control valve after passing through the heater water pump in the liquid hydrogen heavy truck thermal management system. One end of the water pipe of the power battery is connected to one end of the battery heat exchanger after passing through the battery PTC heater and battery water pump in the liquid hydrogen heavy truck thermal management system. The other end of the water pipe of the power battery is connected to the other end of the battery heat exchanger.

[0086] In one embodiment of this application, the control unit 320 is used for:

[0087] When the real-time temperature of the hydrogen fuel cell engine is not less than the preset temperature T1, the first valve port of the third control valve and the second valve port of the third control valve are connected to enable the liquid hydrogen heavy truck thermal management system to enter the cooling mode.

[0088] In one embodiment of this application, the control unit 320 is used for:

[0089] When the real-time temperature of the hydrogen fuel cell engine is less than the preset temperature T2, and the real-time temperature of the cab heater core is less than the set temperature T... H When the first control valve is closed, the second valve port and the third valve port of the fourth control valve are connected, and the warm air water pump and the warm air PTC heater are turned on, so that the liquid hydrogen heavy truck thermal management system enters the first heating mode.

[0090] In one embodiment of this application, the control unit 320 is used for:

[0091] When the real-time temperature of the hydrogen fuel cell engine is not less than the set temperature T2, and the real-time temperature of the cab heater core is less than the set temperature T... H At that time, the first control valve is connected, the first and second valve ports of the fourth control valve are connected, the third and fourth valve ports of the fourth control valve are connected, and the warm air water pump and the warm air PTC heater are shut down, so that the liquid hydrogen heavy truck thermal management system enters the second heating mode.

[0092] In one embodiment of this application, the control unit 320 is used for:

[0093] When the real-time temperature of the hydrogen fuel cell engine is lower than the preset temperature T3, and the real-time temperature of the power battery is lower than the set temperature T... BWhen the second control valve is closed, the battery water pump and the battery PTC heater are turned on, so that the liquid hydrogen heavy truck thermal management system enters the first heating mode.

[0094] In one embodiment of this application, the control unit 320 is used for:

[0095] When the real-time temperature of the hydrogen fuel cell engine is not lower than the set temperature T3, and the real-time temperature of the power battery is lower than the set temperature T... B When the second control valve is connected, the battery water pump is turned on and the battery PTC heater is turned off, so that the liquid hydrogen heavy truck thermal management system enters the second heating mode.

[0096] In one embodiment of this application, the control unit 320 is used for:

[0097] When the real-time temperature of the hydrogen fuel engine is not less than the set temperature T4, the first valve port of the third control valve and the third valve port of the third control valve are connected to enable the liquid hydrogen heavy truck thermal management system to enter the third heating mode, wherein the coolant can flow through the liquid hydrogen vaporization device, and the coolant is cooled by the liquid hydrogen vaporization in the liquid hydrogen vaporization device after absorbing heat.

[0098] It should be noted that the thermal management device of the liquid hydrogen heavy-duty truck thermal management system described above can realize each step of the thermal management method of the liquid hydrogen heavy-duty truck thermal management system provided in the foregoing embodiments. The relevant explanations of the thermal management method of the liquid hydrogen heavy-duty truck thermal management system are applicable to the thermal management device of the liquid hydrogen heavy-duty truck thermal management system, and will not be repeated here.

[0099] In summary, the technical solution of this application achieves at least the following technical effects:

[0100] The real-time temperature of the target device in the liquid hydrogen heavy-duty truck thermal management system is detected. When the real-time temperature of the target device meets the preset temperature condition, the liquid hydrogen heavy-duty truck thermal management system is controlled to enter the corresponding thermal management mode by adjusting the coolant circulation path in the system. This application enhances the correlation between the cooling and heating functions of the entire vehicle system by setting six thermal management modes. By adjusting the control valves in the liquid hydrogen heavy-duty truck thermal management system, a waste heat utilization branch and a liquid hydrogen vaporization cold energy recovery branch are formed. This not only enables the heat emitted by the hydrogen fuel cell engine to be fully recovered and utilized to meet the cooling and heating requirements of the entire vehicle system, but also reduces the load on the cooling cycle of the hydrogen fuel cell engine, as well as the energy consumption of the heating system and the power battery, thereby reducing the vehicle's power consumption and energy consumption, increasing the driving range, and improving the vehicle's economy.

[0101] It should be noted that:

[0102] The algorithms and displays provided herein are not inherently related to any particular computer, virtual device, or other equipment. Various general-purpose devices can also be used in conjunction with the teachings herein. The required structure for constructing such devices is apparent from the above description. Furthermore, this application is not directed to any particular programming language. It should be understood that the content of this application described herein can be implemented using various programming languages, and the above description of specific languages ​​is for the purpose of disclosing the best mode of implementation of this application.

[0103] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of this application may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0104] Similarly, it should be understood that, in order to simplify this application and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of this application, various features of this application are sometimes grouped together into a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed application requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of this application.

[0105] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0106] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0107] The various component embodiments of this application can be implemented in hardware, or as software modules running on one or more processors, or a combination thereof. Those skilled in the art will understand that microprocessors or digital signal processors (DSPs) can be used in practice to implement some or all of the functions of some or all of the components in the thermal management device of the liquid hydrogen heavy-duty truck thermal management system according to embodiments of this application. This application can also be implemented as a device or apparatus program (e.g., a computer program and computer program product) for performing part or all of the methods described herein. Such a program implementing this application can be stored on a computer-readable medium, or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.

[0108] For example, Figure 4 A schematic diagram of an electronic device according to an embodiment of this application is shown. The electronic device 400 includes a processor 410 and a memory 420 arranged to store computer-executable instructions (computer-readable program code). The memory 420 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. The memory 420 has a storage space 430 for storing computer-readable program code 431 for performing any of the method steps described above. For example, the storage space 430 for storing computer-readable program code may include various computer-readable program codes 431 respectively for implementing the various steps in the methods described above. The computer-readable program code 431 can be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, CDs, memory cards, or floppy disks. Such computer program products are typically, for example... Figure 5 The computer-readable storage medium shown.

[0109] Figure 5A schematic diagram of a computer-readable storage medium according to an embodiment of this application is shown. The computer-readable storage medium 500 stores computer-readable program code 431 for performing the method steps according to this application, which can be read by the processor 410 of an electronic device 400. When the computer-readable program code 431 is executed by the electronic device 400, it causes the electronic device 400 to perform the various steps of the method described above. Specifically, the computer-readable program code 431 stored in the computer-readable storage medium can perform the methods shown in any of the above embodiments. The computer-readable program code 431 can be compressed in a suitable form.

[0110] It should be noted that the above embodiments are illustrative of this application and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. This application can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

Claims

1. A thermal management method of a liquid hydrogen heavy truck thermal management system, characterized by, The application discloses a hydrogen heavy truck heat management system and a heat management method thereof. The heat management method comprises the following steps: detecting the real-time temperature of a target device in the hydrogen heavy truck heat management system, wherein the target device comprises at least one of a hydrogen fuel engine, a cab heater core, a power battery and a liquid hydrogen vaporization device; when the real-time temperature of the target device meets a preset temperature condition, adjusting a cooling liquid circulation flow path in the hydrogen heavy truck heat management system to control the hydrogen heavy truck heat management system to enter a corresponding heat management mode; heating the cab air by using the waste heat of the hydrogen fuel engine; heating the power battery to a working temperature by using the waste heat of the hydrogen fuel engine; heating the liquid hydrogen by using the waste heat of the hydrogen fuel engine to help the cooled cooling liquid after the vaporization process to flow back to the hydrogen fuel engine, thereby realizing the cooling function of the hydrogen fuel engine; the hydrogen heavy truck heat management system is provided with a control valve and a plurality of pipeline waterways for the cooling liquid, the control valve comprises a first control valve, a second control valve, a third control valve and a fourth control valve, wherein the first control valve and the second control valve are two-way valves, the third control valve is a three-way valve, and the fourth control valve is a four-way valve, the heat management method further comprises the following steps: connecting a branch one of a first waterway of the hydrogen fuel engine with a first valve port of the fourth control valve through the first control valve, and connecting a branch two of the first waterway of the hydrogen fuel engine with one end of a battery heat exchanger in the hydrogen heavy truck heat management system through the second control valve, connecting a second waterway of the hydrogen fuel engine with one end of an FCE heat dissipation module in the hydrogen heavy truck heat management system, and connecting the other end of the FCE heat dissipation module with the first valve port of the third control valve, 2. The thermal management method of claim 1, wherein, connecting a branch one of a third waterway of the hydrogen fuel engine with a fourth valve port of the fourth control valve, connecting a branch two of the third waterway of the hydrogen fuel engine with a second valve port of the third control valve, connecting a branch three of the third waterway of the hydrogen fuel engine with the other end of the battery heat exchanger, connecting a branch four of the third waterway of the hydrogen fuel engine with one end of a heater of the liquid hydrogen vaporization device, and connecting the other end of the heater of the liquid hydrogen vaporization device with a third valve port of the third control valve. the heat management method further comprises the following steps: connecting one end of a pipeline waterway of the cab heater core with a second valve port of the fourth control valve through a cab heater PTC heater in the hydrogen heavy truck heat management system, connecting the other end of the pipeline waterway of the cab heater core with a third valve port of the fourth control valve through a cab water pump in the hydrogen heavy truck heat management system, 3. The thermal management method of claim 2, wherein, connecting one end of a pipeline waterway of the power battery with one end of a battery PTC heater and a battery water pump in the hydrogen heavy truck heat management system, and connecting the other end of the pipeline waterway of the power battery with the other end of the battery heat exchanger. the heat management mode comprises a cooling mode, and the heat management method comprises the following steps: When the real-time temperature of the hydrogen fuel engine is not less than a preset temperature T1, the first valve port of the third control valve and the second valve port of the third control valve are controlled to be in communication, so that the liquid hydrogen heavy truck thermal management system enters a cooling mode.

4. The thermal management method of claim 2, wherein, The thermal management mode includes a first heating mode, and the thermal management method includes: When the real-time temperature of the hydrogen fuel engine is less than a preset temperature T2, and the real-time temperature of the cab heater core is less than a set temperature T H , the first control valve is controlled to be closed, the second valve port of the fourth control valve is closed, the third valve port of the fourth control valve is communicated, the heater water pump and the heater PTC heater are opened, and the liquid hydrogen heavy truck thermal management system enters a first heating mode.

5. The thermal management method of claim 2, wherein, The thermal management mode includes a second heating mode, and the thermal management method includes: When the real-time temperature of the hydrogen fuel engine is not less than a set temperature T2, and the real-time temperature of the cab heater core is less than a set temperature T H , the first control valve is controlled to be communicated, the first valve port and the second valve port of the fourth control valve are controlled to be communicated, the third valve port and the fourth valve port of the fourth control valve are controlled to be communicated, and the heater water pump and the heater PTC heater are controlled to be closed, so that the liquid hydrogen heavy truck thermal management system enters a second heating mode.

6. The thermal management method of claim 2, wherein, The thermal management mode includes a first heating mode, and the thermal management method includes: When the real-time temperature of the hydrogen fuel engine is less than a preset temperature T3, and the real-time temperature of the power battery is less than a set temperature T B , the second control valve is controlled to be closed, the battery water pump and the battery PTC heater are opened at the same time, so that the liquid hydrogen heavy truck thermal management system enters a first heating mode.

7. The thermal management method of claim 2, wherein, The thermal management mode includes a second heating mode, and the thermal management method includes: When the real-time temperature of the hydrogen fuel engine is not less than a set temperature T3, and the real-time temperature of the power battery is less than a set temperature T B When the real-time temperature of the hydrogen fuel engine is not less than a set temperature T3, and the real-time temperature of the power battery is less than a set temperature T B When the real-time temperature of the hydrogen fuel engine is not less than a set temperature T3, and the real-time temperature of the power battery is less than a set temperature T B When the real-time temperature of the hydrogen fuel engine is not less than a set temperature T3, and the real-time temperature of the power battery is less than a set temperature T B When the real-time temperature of the hydrogen fuel engine is not less than a set temperature T3, and the real-time temperature of the power 8. The thermal management method of claim 2, wherein, The thermal management mode includes a third heating mode, and the thermal management method includes: When the real-time temperature of the hydrogen fuel engine is not less than a preset temperature T1, the first valve port of the third control valve and the second valve port of the third control valve are controlled to be in communication, so that the liquid hydrogen heavy truck thermal management system enters a cooling mode.

9. A thermal management device of a liquid hydrogen heavy truck thermal management system, characterized in that, The thermal management device for the liquid hydrogen heavy truck thermal management system includes: A detection unit is configured to detect a real-time temperature of a target device in the liquid hydrogen heavy truck thermal management system, wherein the target device includes at least one of a hydrogen fuel engine, a cab heater core, a power battery, and a liquid hydrogen vaporization device; A control unit is configured to, when the real-time temperature of the target device meets a preset temperature condition, adjust a cooling liquid circulation flow path in the liquid hydrogen heavy truck thermal management system to control the liquid hydrogen heavy truck thermal management system to enter a corresponding thermal management mode; Waste heat generated by the hydrogen fuel engine is used to heat cab air; Waste heat generated by the hydrogen fuel engine is used to heat the power battery to a working temperature; Waste heat generated by the hydrogen fuel engine is used to heat liquid hydrogen, and cooled cooling liquid after a vaporization process is returned to the hydrogen fuel engine to achieve a cooling function of the hydrogen fuel engine; the liquid hydrogen heavy truck thermal management system is provided with a control valve and a plurality of pipeline waterways for the cooling liquid to flow through, the control valve includes a first control valve, a second control valve, a third control valve, and a fourth control valve, wherein the first control valve and the second control valve are two-way valves, the third control valve is a three-way valve, and the fourth control valve is a four-way valve, The thermal management device further includes: A branch of the first waterway of the hydrogen fuel engine is connected to a first valve port of the fourth control valve after the first control valve, and a branch two of the first waterway of the hydrogen fuel engine is connected to one end of a battery heat exchanger in the liquid hydrogen heavy truck thermal management system after the second control valve, A second waterway of the hydrogen fuel engine is connected to one end of an FCE heat dissipation module in the liquid hydrogen heavy truck thermal management system, and the other end of the FCE heat dissipation module is connected to the first valve port of the third control valve, The branch one of the third water circuit of the hydrogen fuel engine is connected with the fourth valve port of the fourth control valve, the branch two of the third water circuit of the hydrogen fuel engine is connected with the second valve port of the third control valve, the branch three of the third water circuit of the hydrogen fuel engine is connected with the other end of the battery heat exchanger, the branch four of the third water circuit of the hydrogen fuel engine is connected with one end of the heater of the liquid hydrogen vaporization device, and the other end of the heater of the liquid hydrogen vaporization device is connected with the third valve port of the third control valve.

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