A liquid hydrogen heavy truck engine thermal management system and control method with waste heat utilization

Abstract

The present application discloses a liquid hydrogen heavy truck engine thermal management system and control method with waste heat utilization, the liquid hydrogen heavy truck engine thermal management system includes: an engine system, a heater system, and a liquid hydrogen vaporization system, all of which are provided with pipeline waterways and a plurality of control valves for controlling the connectivity of the pipeline waterways. The present application adjusts the plurality of control valves in the pipeline waterway so that the thermal management system can connect different circulation flow branches, thereby enhancing the correlation between the cooling function and the heating function of the entire vehicle system. The present application fully recycles the waste heat of the coolant in the pipeline waterway by adding three engine waste heat utilization branches to meet the needs of power battery heating, cab heating, and liquid hydrogen vaporization heating; at the same time, by designing an electric heating circuit, the heating and heating problems when the waste heat of the coolant is insufficient are solved, thereby reducing the energy consumption of the entire vehicle system and increasing the cruising range.

Description

Technical Field

[0001] The present application relates to the field of automotive thermal management technology, and in particular to a liquid hydrogen heavy-duty truck engine thermal management system and control method with waste heat utilization. Background Art

[0002] The hydrogen fuel engine thermal management system can ensure that the engine operates at an appropriate temperature. The reasonable design and optimization of the engine thermal management system can not only improve the performance and thermal efficiency of the engine, but also has extremely important significance for the efficient and safe operation of the entire vehicle.

[0003] In related technologies, the cooling needs of hydrogen fuel engines are mostly met by coolant heat dissipation, that is, the coolant is used to carry the large amount of heat energy emitted by the engine when it is working to the radiator, so that the cooling air flows quickly on the surface of the radiator to achieve engine cooling; and for the needs of warm air heating, battery heating, liquid hydrogen vaporization, etc., the coolant is heated by inputting power to the PTC (Positive Temperature Coefficien) heater, thereby achieving the purpose of heating, heating the battery, or achieving liquid hydrogen vaporization after absorbing heat.

[0004] However, in the cooling process of the existing technical solution, the working heat of the liquid hydrogen engine cannot be fully utilized, and the waste heat of the coolant is directly discharged into the atmosphere and wasted. In order to meet the needs of cab heating, battery heating, liquid hydrogen vaporization, etc., additional electricity is mostly required to heat the PTC heater, which leads to problems such as increased energy consumption of the whole vehicle and reduced vehicle driving range. At the same time, the cooling and heating requirements of the system in the existing technical solution are unrelated to each other, and the degree of coupling is low. Summary of the Invention

[0005] In view of the above problems, the present application is proposed to provide a liquid hydrogen heavy-duty truck engine thermal management system and control method with waste heat utilization, so as to fully utilize the waste heat of the hydrogen fuel engine, reduce the engine cooling cycle load, reduce the heating energy consumption of the warm air system, liquid hydrogen vaporization, etc., improve the coupling of the system cooling and heating functions, and thus achieve the technical effect of reducing the vehicle's power and energy consumption, increasing the cruising range, and improving the vehicle's economy.

[0006] According to the first aspect of the present application, a liquid hydrogen heavy truck engine thermal management system with waste heat utilization is provided, the liquid hydrogen heavy truck engine thermal management system comprising: an engine system, a heating system, and a liquid hydrogen vaporization system.

[0007] The engine system includes at least a hydrogen fuel engine and an FCE heat dissipation module; the heating system includes at least a heating core, a heating system water pump, and a heating system heater; and the liquid hydrogen vaporization system includes at least a liquid hydrogen vaporization device;

[0008] The engine system, heating system, and liquid hydrogen vaporization system are all provided with pipelines and waterways for circulating coolant. The liquid hydrogen heavy truck engine thermal management system is also provided with multiple control valves for controlling the connectivity between the pipelines and waterways.

[0009] The control valve comprises at least a first control valve and a second control valve, wherein:

[0010] A first branch of the first pipeline waterway of the hydrogen fuel engine is connected to a first end of the pipeline waterway of the heater core, a second branch of the first pipeline waterway of the hydrogen fuel engine is connected to a first end of the FCE heat dissipation module, a first branch of the second pipeline waterway of the hydrogen fuel engine is connected to the first control valve, and a second branch of the second pipeline waterway of the hydrogen fuel engine is connected to a second end of the FCE heat dissipation module;

[0011] The first end of the pipeline waterway of the heater core passes through the heater system water pump, the heater system heater, the first control valve, and the second control valve in sequence, and is connected to the second end of the pipeline waterway of the heater core. At the same time, the first branch of the second pipeline waterway of the hydrogen fuel engine passes through the first control valve and the second control valve in sequence, and is connected to the second end of the pipeline waterway of the heater core.

[0012] The first pipeline waterway of the liquid hydrogen vaporization system is connected to the first branch of the first pipeline waterway of the hydrogen fuel engine and the first end of the pipeline waterway of the heater core respectively, and the second pipeline waterway of the liquid hydrogen vaporization system is connected to the second control valve.

[0013] Optionally, the first control valve and the second control valve are both three-way valves, and a temperature control valve is provided on the second pipeline waterway of the hydrogen fuel engine.

[0014] Optionally, the first branch of the first pipeline waterway of the hydrogen fuel engine is connected to the first valve port of the first control valve after passing through the heating system water pump and the heating system heater; the first branch of the second pipeline waterway of the hydrogen fuel engine is connected to the third valve port of the first control valve;

[0015] The first end of the water channel of the heating core passes through the heating system water pump and the heating system heater, and is connected to the first valve port of the first control valve, and is connected to the second end of the water channel of the heating core through the second valve port of the first control valve, the second valve port of the second control valve, and the first valve port of the second control valve;

[0016] The second pipeline waterway of the liquid hydrogen vaporization system passes through the third valve port of the second control valve and the first valve port of the second control valve, and is connected to the second end of the pipeline waterway of the heater core.

[0017] Optionally, the control valve further includes a third control valve, which is connected to a third branch of the first pipeline water channel of the hydrogen fuel engine, wherein the third control valve is a two-way valve.

[0018] Optionally, the liquid hydrogen heavy truck engine thermal management system further includes a battery system, wherein:

[0019] The battery system at least includes a power battery, a battery heat exchanger, a battery system water pump, a battery system heater, and a battery system water temperature sensor.

[0020] Optionally, the third branch of the first pipeline waterway of the hydrogen fuel engine is connected to the first end of the pipeline waterway of the battery system through the third control valve, and the third branch of the second pipeline waterway of the hydrogen fuel engine is connected to the second end of the pipeline waterway of the battery system.

[0021] Optionally, an FCE water temperature sensor is provided on the pipeline waterway of the engine system, and a heater water temperature sensor is provided on the pipeline waterway of the heater system.

[0022] Optionally, the liquid hydrogen vaporization system is further provided with a liquid hydrogen vaporization system heater for promoting liquid hydrogen vaporization, and the liquid hydrogen vaporization system heater is connected to the liquid hydrogen vaporization device.

[0023] According to a second aspect of the present application, a control method for a liquid hydrogen heavy truck engine thermal management system with waste heat utilization as described in any one of the first aspects above is provided, the method comprising:

[0024] Detecting the real-time temperature of target equipment in the liquid hydrogen heavy truck engine thermal management system, wherein the target equipment includes at least one of the following: a hydrogen fuel engine, a heater core, a power battery, and a liquid hydrogen vaporization device;

[0025] When the real-time temperature of the target device meets the preset temperature condition, the liquid hydrogen heavy truck engine thermal management system is controlled to connect to the corresponding coolant circulation flow branch.

[0026] Optionally, the method comprises:

[0027] When the real-time temperature of the hydrogen fuel engine is not less than the preset temperature T1, the temperature control valve of the hydrogen fuel engine is controlled to open to form a cooling branch of the hydrogen fuel engine;

[0028] When the real-time temperature of the hydrogen fuel engine is lower than the preset temperature T2, the temperature control valve of the hydrogen fuel engine is controlled to close. If the real-time temperature of the heater core is lower than the preset temperature T H , the warm air system water pump and the warm air system heater are controlled to open, and at the same time, the first valve port and the second valve port of the first control valve are controlled to be connected, the third valve port of the first control valve is closed, and the first valve port and the second valve port of the second control valve are controlled to be connected to form a cab PTC heating branch.

[0029] When the real-time temperature of the hydrogen fuel engine is not less than the preset temperature T2, and the real-time temperature of the heater core is less than the set temperature T H When the temperature control valve of the hydrogen fuel engine is controlled to open, and the second valve port and the third valve port of the first control valve are controlled to be connected, the first valve port of the first control valve is closed, and the first valve port and the second valve port of the second control valve are connected to form a first branch for utilizing waste heat of the engine;

[0030] When the real-time temperature of the hydrogen fuel engine is not less than the preset temperature T3 and the power battery needs to be heated, the temperature control valve of the hydrogen fuel engine is controlled to open, and the third control valve is controlled to be connected to form a second branch for utilizing the waste heat of the engine;

[0031] When the real-time temperature of the hydrogen fuel engine is lower than the preset temperature T2, the temperature control valve of the hydrogen fuel engine is controlled to be closed, and the water pump and the heater of the heating system are controlled to be turned on, and at the same time, the first valve port and the second valve port of the first control valve are controlled to be connected, the third valve port of the first control valve is closed, and the second valve port and the third valve port of the second control valve are controlled to be connected, so as to form a liquid hydrogen vaporization PTC heating branch;

[0032] When the real-time temperature of the hydrogen fuel engine is not less than the preset temperature T2 and the real-time temperature meets the operating temperature of the liquid hydrogen vaporization device, the temperature control valve of the hydrogen fuel engine is controlled to open, and the second valve port and the third valve port of the first control valve are controlled to be connected, the first valve port of the first control valve is closed, and the second valve port and the third valve port of the second control valve are connected to form a third branch for utilizing the waste heat of the engine.

[0033] From the above, it can be seen that at least one of the above technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects: a liquid hydrogen heavy-duty truck engine thermal management system with waste heat utilization is provided, the liquid hydrogen heavy-duty truck engine thermal management system includes: an engine system, a heater system, and a liquid hydrogen vaporization system, the engine system includes at least a hydrogen fuel engine and an FCE heat dissipation module, the heater system includes at least a heater core, a heater system water pump, and a heater system heater, and the liquid hydrogen vaporization system includes at least a liquid hydrogen vaporization device; the engine system, the heater system, and the liquid hydrogen vaporization system are all provided with pipelines for circulating coolant, and the liquid hydrogen heavy-duty truck engine thermal management system is also provided with multiple control valves for controlling the connectivity between the pipelines; the present application adjusts the multiple control valves in the thermal management system so that the liquid hydrogen heavy-duty truck engine thermal management system can connect different coolant circulation branches, thereby enhancing the correlation between the cooling function and the heating function of the entire vehicle system. At the same time, based on the traditional hydrogen fuel engine cooling cycle, this application adds three hydrogen fuel engine waste heat utilization branches to fully recycle the waste heat of the coolant in the pipeline water channel when the hydrogen fuel engine is working, and use it to meet the heating needs of the power battery and the heating of the cab, or use it as a heat source for liquid hydrogen vaporization; by designing a separate electric heating circuit, when the coolant temperature in the hydrogen fuel engine pipeline water channel is low, the lack of coolant waste heat in the engine pipeline is compensated, thereby reducing the heat dissipation load of the hydrogen fuel engine heat dissipation module and reducing the energy consumption of the entire vehicle system, thereby achieving the technical effect of increasing cruising range and improving the economy of the entire vehicle.

[0034] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0036] Figure 1 This is a schematic structural diagram of a liquid hydrogen heavy truck engine thermal management system with waste heat utilization in one embodiment of the present application;

[0037] Figure 2 This is a flow chart of a control method for a liquid hydrogen heavy truck engine thermal management system with waste heat utilization in one embodiment of the present application.

[0038] In the figure: 101, hydrogen fuel engine; 102, FCE water temperature sensor; 103, FCE heat dissipation module; 104, temperature control valve; 105, heater core; 106, heater system water pump; 107, heater system heater; 108, first control valve; 109, second control valve; 110, heater water temperature sensor; 111, liquid hydrogen vaporization device; 112, liquid hydrogen vaporization system heater; 113, third control valve; Q 11 Indicates the first valve port of the first control valve; Q 12 Indicates the second valve port of the first control valve; Q 13 Indicates the third valve port of the first control valve; Q 21 Indicates the first valve port of the second control valve; Q 22 Indicates the second valve port of the second control valve; Q 23 Indicates the third valve port of the second control valve. DETAILED DESCRIPTION

[0039] The following describes exemplary embodiments of the present application in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0040] As mentioned above, the cooling and heating requirements in the thermal management system of the existing technical solution are less correlated. During the cooling process of the liquid hydrogen engine, heat is often wasted. At the same time, in order to meet various heating requirements, additional electricity is required to power the PTC heater, thereby increasing the energy consumption of the entire vehicle and reducing the vehicle's cruising range.

[0041] Based on this, a liquid hydrogen heavy-duty truck engine thermal management system and control method with waste heat utilization are proposed in the embodiment of the present application, so as to fully utilize the waste heat of the hydrogen fuel engine, reduce the cooling cycle load of the hydrogen fuel engine, reduce the energy consumption of the warm air system heating, power battery and liquid hydrogen vaporization device heating; improve the coupling of the system cooling function and heating function, and thus achieve the technical effect of reducing the vehicle's power and energy consumption, increasing the cruising range, and improving the economy of the vehicle.

[0042] The technical concept of this application is that, on the one hand, based on the traditional hydrogen fuel engine cooling cycle, three hydrogen fuel engine waste heat utilization branches are added to fully recycle the waste heat of the coolant in the pipeline waterway when the hydrogen fuel engine is working, and use it to meet the heating needs of the power battery and the heating of the cab, or use it as a heat source for liquid hydrogen vaporization; on the other hand, by designing a separate electric heating circuit, when the coolant temperature in the hydrogen fuel engine pipeline waterway is low, the electric heating circuit can be used to make up for the lack of coolant waste heat in the engine pipeline. This reduces the heat dissipation load of the hydrogen fuel engine heat dissipation module and reduces the energy consumption of the entire vehicle system. At the same time, this application integrates six circulation paths for coolant circulation, enhancing the correlation between the cooling function and the heating function of the entire vehicle system.

[0043] It is worth noting that the present application is applicable to liquid hydrogen heavy trucks, which refer to heavy trucks that use liquid hydrogen as a power fuel. The engine in the present application is a hydrogen fuel engine. Therefore, the control method described in the present application is applicable to the thermal management system of liquid hydrogen heavy trucks.

[0044] The following describes in detail the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0045] In one embodiment of the present application, a liquid hydrogen heavy truck engine thermal management system with waste heat utilization is proposed, such as Figure 1 As shown, the liquid hydrogen heavy-duty truck engine thermal management system includes at least the pipeline waterway area of ​​the engine system, the pipeline waterway area of ​​the heater system, and the pipeline waterway area of ​​other circuits (including but not limited to the battery circuit), and the multiple pipeline waterway areas are interconnected.

[0046] It can be understood that since hydrogen is very easy to achieve lean combustion when used as fuel for the internal combustion engine of new energy vehicles, and has the advantages of low pollutant emissions and high thermal efficiency, the engine in the liquid hydrogen heavy-duty truck engine thermal management system described in this application is a hydrogen fuel engine, and in the embodiment of this application, the coolant in the liquid hydrogen heavy-duty truck engine thermal management system refers to a cooling liquid with antifreeze properties.

[0047] like Figure 1 As shown, the liquid hydrogen heavy-duty truck engine thermal management system with waste heat utilization includes: an engine system, a heating system, and a liquid hydrogen vaporization system. The engine system includes at least a hydrogen fuel engine 101 and an FCE heat dissipation module 102 (FCE, FuelCellEngine, fuel cell engine). The heating system includes at least a heating core 105, a heating system water pump 106, and a heating system heater 107. The liquid hydrogen vaporization system includes at least a liquid hydrogen vaporization device 111. At the same time, the liquid hydrogen vaporization device 111 is also provided with a liquid hydrogen inlet and a hydrogen outlet.

[0048] In this embodiment, the engine system, heater system, and liquid hydrogen vaporization system are all provided with pipeline waterways for circulating coolant. The liquid hydrogen heavy-duty truck engine thermal management system is also provided with multiple control valves for controlling the connectivity between the pipeline waterways. Specifically, the control valves include at least a first control valve 108 and a second control valve 109.

[0049] The first branch of the first pipe waterway of the hydrogen fuel engine 101 is connected to the first end of the pipe waterway of the heater core 105, the second branch of the first pipe waterway of the hydrogen fuel engine 101 is connected to the first end of the FCE heat dissipation module 103, the first branch of the second pipe waterway of the hydrogen fuel engine 101 is connected to the first control valve 108, and the second branch of the second pipe waterway of the hydrogen fuel engine 101 is connected to the second end of the FCE heat dissipation module 103;

[0050] The first end of the pipe waterway of the heater core 105 passes through the heater system water pump 106, the heater system heater 107, the first control valve 108, and the second control valve 109 in sequence, and is then connected to the second end of the pipe waterway of the heater core 105. At the same time, the first branch of the second pipe waterway of the hydrogen fuel engine 101 passes through the first control valve 108 and the second control valve 109 in sequence, and is then connected to the second end of the pipe waterway of the heater core 105.

[0051] The first pipeline waterway of the liquid hydrogen vaporization system is connected to the first branch of the first pipeline waterway of the hydrogen fuel engine 101 and the first end of the pipeline waterway of the heater core 105 respectively, and the second pipeline waterway of the liquid hydrogen vaporization system is connected to the second control valve 109.

[0052] In an embodiment of the present application, by adjusting the connectivity of multiple control valves in the thermal management system, the liquid hydrogen heavy truck engine thermal management system can form the following coolant circulation flow branches: hydrogen fuel engine cooling branch, cab PTC heating branch, liquid hydrogen vaporization PTC heating branch, first engine waste heat utilization branch, second engine waste heat utilization branch, and third engine waste heat utilization branch. It can be seen that the present application integrates six coolant circulation flow branches for realizing the cooling or heating function of the entire vehicle system. Not only does it add three hydrogen fuel engine waste heat utilization branches on the basis of the traditional hydrogen fuel engine cooling cycle, but it also designs a separate electric heating circuit. When the coolant temperature in the hydrogen fuel engine pipeline water channel is low, the electric heating circuit can be used to compensate for the lack of coolant waste heat in the engine pipeline. This not only enhances the correlation between the cooling and heating functions of the entire vehicle system, but also saves the energy consumption of the entire vehicle.

[0053] In one embodiment of the present application, Figure 1 As shown, the first control valve 108 and the second control valve 109 are both three-way valves, and a temperature control valve 104 (such as a thermostat or other temperature control valve) is provided on the second pipeline waterway of the hydrogen fuel engine 101.

[0054] Furthermore, the first branch of the first pipeline waterway of the hydrogen fuel engine 101 passes through the heating system water pump 106 and the heating system heater 107 and is connected to the first valve port Q of the first control valve. 11 The first branch of the second pipeline waterway of the hydrogen fuel engine 101 and the third valve port Q of the first control valve 13 connect;

[0055] The first end of the pipe water path of the heating core 105 passes through the heating system water pump 106 and the heating system heater 107 and is connected to the first valve port Q of the first control valve. 11 connected, and through the second valve port Q of the first control valve 12 , the second valve port Q of the second control valve 22 , the first valve port Q of the second control valve 21 Then connected to the second end of the pipe waterway of the heater core 105;

[0056] The second pipeline waterway of the liquid hydrogen vaporization system passes through the third valve port Q of the second control valve 23 , the first valve port Q of the second control valve 21 Then, it is connected to the second end of the pipe water channel of the warm air core 105.

[0057] In a preferred embodiment of the present application, the control valve also includes a third control valve 113, which is connected to the third branch of the first pipeline waterway of the hydrogen fuel engine 101, and is connected to the pipeline waterways of other circuits in the vehicle system through the third control valve 113. It can be understood that the other circuits include but are not limited to the pipeline waterways of the power battery system, etc. At the same time, in the embodiment of the present application, the third control valve 113 is a two-way valve.

[0058] Furthermore, the liquid hydrogen heavy truck engine thermal management system also includes a battery system, wherein the battery system includes at least a power battery (BAT, BATTERY, i.e., a power battery), a battery heat exchanger, a battery system water pump, a battery system heater, and a battery system water temperature sensor (for the sake of simplicity, not shown in the figure). The third branch of the first pipeline waterway of the hydrogen fuel engine 101 is connected to the first end of the pipeline waterway of the battery system through the third control valve 113, and the third branch of the second pipeline waterway of the hydrogen fuel engine is connected to the second end of the pipeline waterway of the battery system.

[0059] I understand. Figure 1 The display of the engine system, heating system, liquid hydrogen vaporization system and the connection method of their pipelines and waterways, as well as the coolant circulation branch, is only for the convenience of explanation and simplified description and cannot be regarded as a limitation of this application.

[0060] In one embodiment of the present application, the engine system's pipeline waterway is equipped with an FCE water temperature sensor 102 connected to the hydrogen fuel engine 101. The heater system's pipeline waterway is equipped with a heater water temperature sensor 110 connected to the heater core 105. The liquid hydrogen vaporization system is also equipped with a water temperature sensor connected to the liquid hydrogen vaporization device 111 (not shown in the figure for simplicity). These water temperature sensors are respectively used to detect the real-time temperatures of the corresponding hydrogen fuel engine, heater core, power battery, and liquid hydrogen vaporization device.

[0061] In another embodiment of the present application, the liquid hydrogen vaporization system may further be provided with a liquid hydrogen vaporization system heater 112 for promoting vaporization of liquid hydrogen, and the liquid hydrogen vaporization system heater 112 is connected to the liquid hydrogen vaporization device 111 .

[0062] It is understood that the liquid hydrogen vaporization system heater can also promote the vaporization of liquid hydrogen. In other words, the liquid hydrogen vaporization system heater can provide compensatory heating when the engine coolant's waste heat is insufficient. Of course, the liquid hydrogen vaporization system in this application may not include a heater. Furthermore, the various circulation branches described in the embodiments of this application are not intended to be limiting of this application, and the coolant circulation path may be further adjusted and configured based on the specific usage scenario.

[0063] In some embodiments of the present application, Figure 2 As shown, a control method for a liquid hydrogen heavy truck engine thermal management system with waste heat utilization as described in any one of the above embodiments is also provided, the method comprising:

[0064] Step S210, detecting the real-time temperature of target equipment in the liquid hydrogen heavy truck engine thermal management system, wherein the target equipment includes at least one of the following: a hydrogen fuel engine, a heater core, a power battery, and a liquid hydrogen vaporization device;

[0065] Step S220: When the real-time temperature of the target device meets the preset temperature condition, the liquid hydrogen heavy truck engine thermal management system is controlled to connect to the corresponding coolant circulation flow branch.

[0066] Furthermore, the control method can be applied to the following situations:

[0067] In the first scenario, when the real-time temperature of the hydrogen fuel engine is not less than the preset temperature T1, the temperature control valve 104 of the hydrogen fuel engine is controlled to open, thereby forming a hydrogen fuel engine cooling branch. Specifically, in this cooling branch, the coolant in the pipeline waterway of the hydrogen fuel engine 101 flows through the FCE heat dissipation module 103 and is cooled before flowing back into the pipeline of the hydrogen fuel engine 101, thereby achieving the hydrogen fuel engine cooling function.

[0068] Case 2: When the real-time temperature of the hydrogen fuel engine is lower than the preset temperature T2, the temperature control valve 104 of the hydrogen fuel engine is controlled to be closed. If the real-time temperature of the heater core is lower than the preset temperature T H , then the heating system water pump 106 and the heating system heater 107 are controlled to be turned on, and the first valve port Q of the first control valve is controlled at the same time. 11 and the second valve port Q of the first control valve 12 The third valve port of the first control valve is closed. 13 , controls the first valve port Q of the second control valve 21 and the second valve port Q of the second control valve 22 Connected, the third valve port Q of the second control valve 23 Can be opened or closed to form the cab PTC heating branch;

[0069] In this heating branch, the coolant in the water path of the heating core pipe passes through the heating system water pump 106, the heating system heater 107, the first valve port Q of the first control valve, and the second valve port Q of the first control valve. 11 and the second valve port Q of the first control valve 12 , the second valve port Q of the second control valve 22 and the first valve port Q of the second control valve 21 Afterwards, it flows back to the pipe waterway of the heater core 105; in this circulation branch, the coolant is heated by the heater and then exchanges heat with the air in the heater core, thereby heating the cabin air, thereby realizing the PTC heating function of the cab.

[0070] Case 3: When the real-time temperature of the hydrogen fuel engine is not less than the preset temperature T2, and the real-time temperature of the heater core is less than the set temperature T H When the temperature control valve 104 of the hydrogen fuel engine is controlled to open, the second valve port Q of the first control valve is controlled 12 and the third valve port Q of the first control valve 13 The first valve port Q of the first control valve is connected 11 Close the first valve port Q of the second control valve 21 and the second valve port Q of the second control valve 22 Connected, the third valve port Q of the second control valve 23 It can be opened or closed to form the first branch of engine waste heat utilization;

[0071] In the first branch of waste heat utilization, the coolant in the pipeline of the hydrogen fuel engine 101 passes through the temperature control valve 104, the third valve port Q of the first control valve, and the 13 and the second valve port Q of the first control valve 12 , the second valve port Q of the second control valve 22 and the first valve port Q of the second control valve 21 , the heater core 105, and then returns to the pipeline of the hydrogen fuel engine after heat exchange with the cabin air in the heater core 105, thereby realizing the cab heating (engine waste heat) function.

[0072] Case 4: When the ambient temperature is low, in order to ensure that the vehicle's power battery charges and discharges at an efficient operating temperature, it is necessary to heat the power battery to a certain temperature. Therefore, in the embodiment of the present application, the power battery can also be heated by utilizing the engine's waste heat. Specifically, when the real-time temperature of the hydrogen fuel engine is not less than the preset temperature T3 and the power battery needs to be heated, the temperature control valve of the hydrogen fuel engine is controlled to open, and the third control valve is controlled to be connected, thereby forming a second branch for utilizing the engine's waste heat.

[0073] In the second branch of waste heat utilization, the coolant in the pipeline of the hydrogen fuel engine 101 flows through the temperature control valve 104, the battery circuit (or other circuit), and the third control valve 113 in sequence, and then exchanges heat with the coolant in the battery circuit, thereby realizing the battery heating (engine waste heat) function.

[0074] Case 5: When the real-time temperature of the hydrogen fuel engine is lower than the preset temperature T2, the temperature control valve 104 of the hydrogen fuel engine is controlled to be closed, and the water pump 106 and the heater 107 of the heating system are controlled to be opened, and the first valve port Q of the first control valve is controlled to be closed. 11 and the second valve port Q of the first control valve 12Connected to the third valve port Q of the first control valve 13 Close, control the second valve port Q of the second control valve 22 and the third valve port Q of the second control valve 23 The first valve port Q of the second control valve is connected 21 It can be opened or closed to form a PTC heating branch of the liquid hydrogen vaporizer;

[0075] In the PTC heating branch of the liquid hydrogen vaporization device, the coolant flows sequentially through the warm air system water pump 106, the warm air system heater 107, the first valve port Q of the first control valve, and the second valve port Q of the first control valve. 11 and the second valve port Q of the first controller 12 , the second valve port Q of the second controller 22 and the third valve port Q of the second controller 23 , and then flows back to the warm air system water pump 106 after the liquid hydrogen vaporization device 111. In this circulation branch, the coolant is heated in the warm air system heater and then releases heat in the liquid hydrogen vaporization device to help the liquid hydrogen phase change into gaseous state, thereby realizing the liquid hydrogen vaporization PTC heating function.

[0076] Case 6: When the real-time temperature of the hydrogen fuel engine is not less than the preset temperature T2 and the real-time temperature meets the operating temperature of the liquid hydrogen vaporization device, the temperature control valve 104 of the hydrogen fuel engine is controlled to open, and the second valve port Q of the first control valve is controlled to open. 12 and the third valve port Q of the first control valve 13 The first valve port Q of the first control valve is connected 11 Close the second valve port Q of the second control valve 22 and the third valve port Q of the second control valve 23 The first valve port Q of the second control valve is connected 21 It can be opened or closed to form a third branch for utilizing the engine's waste heat;

[0077] In the third branch of the engine waste heat utilization, the coolant in the hydrogen fuel engine pipeline passes through the temperature control valve 104, the third valve port Q of the first control valve, and the 13 and the second valve port Q of the first control valve 12 , the second valve port Q of the second control valve 22 and the third valve port Q of the second control valve 23After the liquid hydrogen vaporization device 111, it flows back to the pipeline waterway of the hydrogen fuel engine 101. In this cycle, the coolant with a higher temperature in the hydrogen fuel engine pipeline releases heat in the liquid hydrogen vaporization device to help the liquid hydrogen phase change into gaseous state, thereby realizing the liquid hydrogen vaporization heating (engine waste heat) function. It can be understood that in this embodiment, a heater can be set in the liquid hydrogen vaporization system. When the waste heat of the engine coolant is insufficient, the heater can play a role of compensating heating.

[0078] It can be seen that compared with traditional technical solutions, the control method of the liquid hydrogen heavy-duty truck engine thermal management system with waste heat utilization can achieve the following functions: first, the waste heat of the hydrogen fuel engine is used to heat the cab air, reduce the power consumption of heating, and reduce the heat dissipation load of the hydrogen fuel engine; second, the waste heat of the hydrogen fuel engine is used to heat the battery to the operating temperature, reduce the power consumption of the whole vehicle, and reduce the heat dissipation load of the hydrogen fuel engine; third, the coolant of the hydrogen fuel engine is introduced into the liquid hydrogen vaporization device, and the waste heat of the hydrogen fuel engine is used to heat the liquid hydrogen to help complete the vaporization process.

[0079] From the above, it can be seen that at least one of the above technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects: a liquid hydrogen heavy-duty truck engine thermal management system with waste heat utilization is provided, the liquid hydrogen heavy-duty truck engine thermal management system includes: an engine system, a heater system, and a liquid hydrogen vaporization system, the engine system includes at least a hydrogen fuel engine and an FCE heat dissipation module, the heater system includes at least a heater core, a heater system water pump, and a heater system heater, and the liquid hydrogen vaporization system includes at least a liquid hydrogen vaporization device; the engine system, the heater system, and the liquid hydrogen vaporization system are all provided with pipelines for circulating coolant, and the liquid hydrogen heavy-duty truck engine thermal management system is also provided with multiple control valves for controlling the connectivity between the pipelines; the present application adjusts the multiple control valves in the thermal management system so that the liquid hydrogen heavy-duty truck engine thermal management system can connect different coolant circulation branches, thereby enhancing the correlation between the cooling function and the heating function of the entire vehicle system. At the same time, based on the traditional hydrogen fuel engine cooling cycle, this application adds three hydrogen fuel engine waste heat utilization branches to fully recycle the waste heat of the coolant in the pipeline water channel when the hydrogen fuel engine is working, and use it to meet the heating needs of the power battery and the heating of the cab, or use it as a heat source for liquid hydrogen vaporization; by designing a separate electric heating circuit, when the coolant temperature in the hydrogen fuel engine pipeline water channel is low, the lack of coolant waste heat in the engine pipeline is compensated, thereby reducing the heat dissipation load of the hydrogen fuel engine heat dissipation module and reducing the energy consumption of the entire vehicle system, thereby achieving the technical effect of increasing cruising range and improving the economy of the entire vehicle.

[0080] It should be noted that the above embodiments illustrate rather than limit the present application, and that a person skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbols placed between brackets 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. The present application may be implemented by means of hardware comprising several different elements and by means of appropriately programmed computers. In a unit claim 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 may be interpreted as names.

Claims

1. A liquid hydrogen heavy truck engine thermal management system with waste heat utilization, characterized in that: The liquid hydrogen heavy truck engine thermal management system includes: engine system, heating system, liquid hydrogen vaporization system, The engine system includes at least a hydrogen fuel engine and an FCE heat dissipation module; the heating system includes at least a heating core, a heating system water pump, and a heating system heater; and the liquid hydrogen vaporization system includes at least a liquid hydrogen vaporization device; The engine system, heating system, and liquid hydrogen vaporization system are all provided with pipelines and waterways for circulating coolant. The liquid hydrogen heavy truck engine thermal management system is also provided with multiple control valves for controlling the connectivity between the pipelines and waterways. The control valve comprises at least a first control valve and a second control valve, wherein: A first branch of the first pipeline waterway of the hydrogen fuel engine is connected to a first end of the pipeline waterway of the heater core, a second branch of the first pipeline waterway of the hydrogen fuel engine is connected to a first end of the FCE heat dissipation module, a first branch of the second pipeline waterway of the hydrogen fuel engine is connected to the first control valve, and a second branch of the second pipeline waterway of the hydrogen fuel engine is connected to a second end of the FCE heat dissipation module; The first end of the pipeline waterway of the heater core passes through the heater system water pump, the heater system heater, the first control valve, and the second control valve in sequence, and is connected to the second end of the pipeline waterway of the heater core. At the same time, the first branch of the second pipeline waterway of the hydrogen fuel engine passes through the first control valve and the second control valve in sequence, and is connected to the second end of the pipeline waterway of the heater core. The first pipe waterway of the liquid hydrogen vaporization system is connected to the first branch of the first pipe waterway of the hydrogen fuel engine and the first end of the pipe waterway of the heater core, respectively, and the second pipe waterway of the liquid hydrogen vaporization system is connected to the second control valve; The first control valve and the second control valve are both three-way valves, and a temperature control valve is provided on the second pipeline waterway of the hydrogen fuel engine; The first branch of the first pipeline water circuit of the hydrogen fuel engine is connected to the first valve port of the first control valve after passing through the heating system water pump and the heating system heater; the first branch of the second pipeline water circuit of the hydrogen fuel engine is connected to the third valve port of the first control valve; The first end of the water channel of the heating core passes through the heating system water pump and the heating system heater, and is connected to the first valve port of the first control valve, and is connected to the second end of the water channel of the heating core through the second valve port of the first control valve, the second valve port of the second control valve, and the first valve port of the second control valve; The second pipeline waterway of the liquid hydrogen vaporization system passes through the third valve port of the second control valve and the first valve port of the second control valve, and is connected to the second end of the pipeline waterway of the heater core.

2. The liquid hydrogen heavy truck engine thermal management system according to claim 1, characterized in that: The control valve further includes a third control valve, which is connected to a third branch of the first pipeline waterway of the hydrogen fuel engine, wherein the third control valve is a two-way valve.

3. The liquid hydrogen heavy truck engine thermal management system according to claim 2, characterized in that: The liquid hydrogen heavy truck engine thermal management system also includes a battery system, wherein: The battery system at least includes a power battery, a battery heat exchanger, a battery system water pump, a battery system heater, and a battery system water temperature sensor.

4. The liquid hydrogen heavy truck engine thermal management system according to claim 3, characterized in that: The third branch of the first pipeline waterway of the hydrogen fuel engine is connected to the first end of the pipeline waterway of the battery system through the third control valve, and the third branch of the second pipeline waterway of the hydrogen fuel engine is connected to the second end of the pipeline waterway of the battery system.

5. The liquid hydrogen heavy truck engine thermal management system according to claim 1, characterized in that: An FCE water temperature sensor is provided on the pipeline waterway of the engine system, and a heater water temperature sensor is provided on the pipeline waterway of the heater system.

6. The liquid hydrogen heavy truck engine thermal management system according to claim 1, characterized in that: The liquid hydrogen vaporization system is further provided with a liquid hydrogen vaporization system heater for promoting the vaporization of liquid hydrogen, and the liquid hydrogen vaporization system heater is connected to the liquid hydrogen vaporization device.

7. A control method for a liquid hydrogen heavy truck engine thermal management system with waste heat utilization according to any one of claims 1 to 6, characterized in that: The method comprises: Detecting the real-time temperature of target equipment in the liquid hydrogen heavy truck engine thermal management system, wherein the target equipment includes at least one of the following: a hydrogen fuel engine, a heater core, a power battery, and a liquid hydrogen vaporization device; When the real-time temperature of the target device meets the preset temperature condition, the liquid hydrogen heavy truck engine thermal management system is controlled to connect to the corresponding coolant circulation flow branch.

8. The control method according to claim 7, characterized in that: The method comprises: When the real-time temperature of the hydrogen fuel engine is not less than the preset temperature T1, the temperature control valve of the hydrogen fuel engine is controlled to open to form a cooling branch of the hydrogen fuel engine; When the real-time temperature of the hydrogen fuel engine is lower than the preset temperature T2, the temperature control valve of the hydrogen fuel engine is controlled to be closed. If the real-time temperature of the heater core is lower than the preset temperature TH, the heater system water pump and the heater are controlled to be turned on. At the same time, the first valve port and the second valve port of the first control valve are controlled to be connected, the third valve port of the first control valve is closed, and the first valve port and the second valve port of the second control valve are controlled to be connected, so as to form a PTC heating branch for the cab. When the real-time temperature of the hydrogen fuel engine is not less than the preset temperature T2, and the real-time temperature of the heater core is less than the set temperature TH, the temperature control valve of the hydrogen fuel engine is controlled to open, and the second valve port and the third valve port of the first control valve are controlled to be connected, the first valve port of the first control valve is closed, and the first valve port and the second valve port of the second control valve are connected to form a first branch for utilizing the waste heat of the engine; When the real-time temperature of the hydrogen fuel engine is not less than the preset temperature T3 and the power battery needs to be heated, the temperature control valve of the hydrogen fuel engine is controlled to open, and the third control valve is controlled to be connected to form a second branch for utilizing the waste heat of the engine; When the real-time temperature of the hydrogen fuel engine is lower than the preset temperature T2, the temperature control valve of the hydrogen fuel engine is controlled to be closed, and the water pump and the heater of the heating system are controlled to be turned on, and at the same time, the first valve port and the second valve port of the first control valve are controlled to be connected, the third valve port of the first control valve is closed, and the second valve port and the third valve port of the second control valve are controlled to be connected, so as to form a liquid hydrogen vaporization PTC heating branch; When the real-time temperature of the hydrogen fuel engine is not less than the preset temperature T2 and the real-time temperature meets the operating temperature of the liquid hydrogen vaporization device, the temperature control valve of the hydrogen fuel engine is controlled to open, and the second valve port and the third valve port of the first control valve are controlled to be connected, the first valve port of the first control valve is closed, and the second valve port and the third valve port of the second control valve are connected to form a third branch for utilizing the waste heat of the engine.

Images