Thermal management method and system for commercial vehicle using fuel cell

Abstract

The invention discloses a thermal management method and system for a fuel cell vehicle, and relates to the field of energy management and exchange. The method comprises the following steps: monitoring the temperature of a gas-electricity system and a power battery of the commercial vehicle; when the temperature of the gas-electricity system is higher than a gas-electricity specified value, liquid fuel in a fuel supply system is controlled to be gasified through a fuel heat exchanger connected with the gas-electricity system and then transmitted to the gas-electricity system; and when the temperature of the gas-electricity system is higher than a gas-electricity specified value and the temperature of the power battery is lower than a battery specified value, the power battery is controlled to be heated through a battery heat exchanger connected with the gas-electricity system. When it is monitored that the temperature of the gas-electricity system is too high and waste heat is generated, the waste heat with heat can be used for heating the power battery and the fuel supply system, so that energy exchange among the gas-electricity system, the power battery and the fuel supply system is achieved, resources are reasonably utilized, and energy waste is avoided.

Description

Technical Field

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

[0002] As a highly efficient, pollution-free and reliable energy conversion device, hydrogen fuel cells have received widespread attention in the automotive industry. Currently, the fuel of commercial fuel cell vehicles is mainly stored in a high-pressure gaseous state, which has disadvantages such as low energy density and large volume. Liquid hydrogen storage has high energy density, which greatly reduces the space of fuel cell vehicles, making their space utilization higher, and can make full use of the cold energy of liquid hydrogen to deal with the waste heat of fuel cells. With the development of fuel cell hydrogen storage system technology, low-temperature liquid hydrogen storage has gradually been applied to fuel cell commercial vehicles.

[0003] The fuel cell system of a commercial vehicle generally includes: a fuel-electric system, a lithium-ion power battery and a fuel supply system. The fuel-electric system will generate a large amount of heat energy during operation. The hydrogen supply system needs to heat the liquid hydrogen to a certain temperature before it can be added to the fuel-electric system. The temperature of the lithium-ion power battery used to assist in providing power for the ignition system needs to be maintained in the range of 20℃-35℃ to achieve maximum efficiency.

[0004] It can be seen that the above-mentioned fuel-electric system, lithium-ion power battery and fuel supply system will each generate heat when working and have an interactive working relationship. How to utilize the energy of the fuel-electric system, lithium-ion power battery and fuel supply system to each other and avoid energy loss is a very practical problem to be solved. Summary of the invention

[0005] In view of the defects in the prior art, the technical problem solved by the present invention is: how to utilize the heat of the fuel-electric system, lithium-ion power batteries and hydrogen supply system to exchange the energy of the fuel-electric system, lithium-ion power batteries and hydrogen supply system, thereby rationally utilizing resources.

[0006] To achieve the above objectives, in a first aspect, an embodiment of the present application provides a thermal management method for a commercial vehicle using a fuel cell, the method comprising the following steps:

[0007] Monitor the temperature of the fuel-electric system and power battery of commercial vehicles;

[0008] When the temperature of the fuel-electric system is above the specified value of the fuel-electric system, the liquid fuel in the fuel supply system is controlled to be gasified through the fuel heat exchanger connected to the fuel-electric system and then transmitted to the fuel-electric system;

[0009] When the temperature of the fuel-electric system is above the fuel-electric specified value and the temperature of the power battery is below the battery specified value, the power battery is controlled to be heated through a battery heat exchanger connected to the fuel-electric system.

[0010] In a second aspect, an embodiment of the present application provides a thermal management system for a commercial vehicle using a fuel cell, the system comprising a fuel-electric cooling subsystem, a fuel supply subsystem and a power battery subsystem; the fuel-electric cooling subsystem comprises a fuel-electric temperature control device, the fuel supply subsystem comprises a gasification device, and the power battery subsystem comprises a battery temperature control device;

[0011] The fuel-electric cooling subsystem and the fuel supply subsystem are connected via a fuel heat exchanger; the fuel-electric cooling subsystem and the power battery subsystem are connected via a battery heat exchanger;

[0012] The fuel-electric cooling subsystem is used to: cool or cool the fuel-electric system through the fuel-electric temperature control device;

[0013] The fuel supply subsystem is used to: when the temperature of the fuel-electricity system is lower than the specified value of fuel-electricity, convert the liquefied fuel into gasified fuel through the gasification device and then transmit it to the fuel-electricity system; when the temperature of the fuel-electricity system is higher than the specified value of fuel-electricity, convert the liquefied fuel into gasified fuel through the fuel heat exchanger and then transmit it to the fuel-electricity system;

[0014] The power battery subsystem is used to: heat up or cool down the power battery through the battery temperature control device; when the temperature of the power battery is lower than the specified value of the battery and the temperature of the fuel-electric system is higher than the specified value of the fuel-electric system, heat up the power battery through the battery heat exchanger.

[0015] In combination with the second aspect, in one embodiment, the fuel-electric temperature control device includes: a radiator, a fuel-electric heat dissipation water pump, and a fuel-electric temperature sensor; the use state of the fuel-electric temperature control device is: the radiator, the fuel-electric heat dissipation water pump, the fuel-electric temperature sensor, and the fuel-electric system form a fuel-electric heat dissipation loop, and the pipeline of the fuel-electric heat dissipation loop is filled with coolant;

[0016] The fuel-electric temperature control device is used to: increase the speed of the fuel-electric cooling water pump when the fuel-electric temperature sensor detects that the temperature of the fuel-electric system is above the fuel-electric specified value; reduce the speed of the fuel-electric cooling water pump when the fuel-electric temperature sensor detects that the temperature of the fuel-electric system is lower than the fuel-electric specified value.

[0017] In combination with the second aspect, in one embodiment, the fuel supply subsystem further includes a gas delivery pipeline, and the use state of the fuel supply subsystem is: a fuel gasification pipeline and a heat exchange gasification pipeline are connected in parallel between the liquefied fuel storage tank and the gas delivery pipeline, the gasification device is arranged on the fuel gasification pipeline, and the fuel heat exchanger is arranged on the heat exchange gasification pipeline;

[0018] When the temperature of the fuel-electric system is lower than the specified value of the fuel-electric system, the liquefied fuel in the liquefied fuel storage tank is converted into gasified fuel through the gasification device and then transmitted to the fuel-electric system through the gas transmission pipeline;

[0019] When the temperature of the fuel-fired power system is above the specified value of the fuel-fired power system, the liquefied fuel in the liquefied fuel storage tank is converted into gasified fuel through the fuel heat exchanger and then transmitted to the fuel-fired power system through the gas transmission pipeline.

[0020] In combination with the second aspect, in one embodiment, a fuel heat exchange shutoff valve is provided on the heat exchange gasification pipeline, and the gasification device includes a gasifier and a gasification shutoff valve; a delivery shutoff valve and a one-way valve are provided on the gas delivery pipeline;

[0021] When the temperature of the fuel-electric system is lower than the specified value of fuel-electric, the gasification stop valve and the delivery stop valve are opened, and the fuel heat exchange stop valve is closed; the liquid fuel in the liquefied fuel storage tank is gasified into gaseous fuel by the gasifier and then transmitted to the fuel-electric system through the one-way valve;

[0022] When the temperature of the fuel-fired power system is above the specified value of the fuel-fired power system, the fuel heat exchange shut-off valve and the delivery shut-off valve are opened, and the vaporization shut-off valve is closed; the liquid fuel in the liquefied fuel storage tank is vaporized into gaseous fuel through the fuel heat exchanger and then transmitted to the fuel-fired power system through the one-way valve.

[0023] In combination with the second aspect, in one embodiment, a buffer tank for buffering gas is further provided on the gas delivery pipeline.

[0024] In combination with the second aspect, in one embodiment, the battery temperature control device includes a power battery cooling water pump, a heater and a battery temperature sensor; the battery temperature control device is in use when: the power battery cooling water pump, the battery temperature sensor, the heater and the power battery form a battery cooling loop, and the pipe of the battery cooling loop is filled with coolant; the battery heat exchanger is arranged on the battery cooling loop;

[0025] When the battery temperature sensor detects that the temperature of the power battery is above the battery temperature setting range, the speed of the power battery cooling water pump is increased, and the power battery cooling water pump drives the coolant to flow to cool the power battery;

[0026] When the battery temperature sensor detects that the temperature of the power battery is lower than the battery temperature setting range, and the temperature of the fuel-electric system is lower than the fuel-electric specified value, the heater turns on, reduces the speed of the power battery cooling water pump, and heats the coolant through the heater;

[0027] When the battery temperature sensor detects that the temperature of the power battery is lower than the battery temperature setting range and the temperature of the fuel-electric system is above the fuel-electric specified value, the power battery cooling water pump is turned on to exchange the heat generated by the fuel-electric system with the coolant through the battery heat exchanger.

[0028] In combination with the second aspect, in one embodiment, the system further comprises a heat exchange circuit provided with a battery heat exchange cut-off valve, the battery heat exchanger is arranged on the heat exchange circuit; the heat exchange circuit is connected to the fuel-electric system;

[0029] When the temperature of the power battery is lower than the specified value of the battery and the temperature of the fuel-electric system is higher than the specified value of the fuel-electric system, the battery heat exchange shut-off valve opens.

[0030] In combination with the second aspect, in one embodiment, the power battery subsystem further includes a refrigerant circuit, an air conditioning compressor, a condenser and an electronic expansion valve are provided on the refrigerant circuit, and a pipe of the refrigerant circuit is filled with refrigerant; the battery heat dissipation circuit and the refrigerant circuit are connected via a refrigerant heat exchanger;

[0031] The refrigerant circuit is used for: When the battery temperature sensor detects that the temperature of the power battery is above the battery temperature setting range, the air-conditioning compressor, condenser and electronic expansion valve are opened, and the refrigerant exchanges heat with the coolant in the battery cooling circuit through the refrigerant heat exchanger.

[0032] In a third aspect, an embodiment of the present application provides a computer-readable storage medium, on which a thermal management program for a commercial vehicle using a fuel cell is stored, wherein when the thermal management program for a commercial vehicle using a fuel cell is executed, the steps of the method mentioned in the first aspect are implemented.

[0033] Compared with the prior art, the advantages of the present invention are:

[0034] When the present invention detects that the temperature of the fuel-electric system is too high and waste heat is generated, the waste heat with heat can be used to heat the power battery and the fuel supply system, thereby realizing energy exchange among the fuel-electric system, the power battery and the fuel supply system, rationally utilizing resources and avoiding energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A schematic diagram of the structure of a thermal management system for a commercial vehicle using a fuel cell in an embodiment of the present invention;

[0037] Figure 2 It is a schematic diagram of the principle of gasifying fuel by the fuel supply subsystem itself in an embodiment of the present invention;

[0038] Figure 3 It is a schematic diagram of the principle of the fuel supply subsystem in the embodiment of the present invention utilizing the fuel-electric system to gasify the fuel;

[0039] Figure 4 This is a schematic diagram of the hardware structure of a thermal management device for a commercial vehicle using a fuel cell involved in an embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0041] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0042] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0043] In a first aspect, an embodiment of the present application provides a thermal management method for a commercial vehicle (a truck in this embodiment) using a fuel cell, the method comprising the following steps:

[0044] Monitor the temperature of the fuel-electric system and power battery of commercial vehicles;

[0045] When the temperature of the fuel-electric system is lower than the specified value of the fuel-electric system, it means that the fuel-electric system itself is not capable enough, so the fuel supply system (using liquefied hydrogen fuel in this embodiment) works according to its own workflow (i.e., the fuel supply system gasifies the liquid fuel and transmits it to the fuel-electric system);

[0046] When the temperature of the fuel-fired power system is above the specified value of the fuel-fired power system, it means that the heat of the fuel-fired power system itself is too high and there will be residual heat (i.e. waste heat). At this time, the liquid fuel in the fuel supply system is controlled to be gasified through the fuel heat exchanger connected to the fuel-fired power system and then transmitted to the fuel-fired power system;

[0047] When the temperature of the fuel-electric system is lower than the fuel-electric specified value, and the temperature of the power battery is lower than the battery specified value, it means that the fuel-electric system itself is not capable enough, so the power battery heats up itself;

[0048] When the temperature of the fuel-electric system is above the fuel-electric specified value and the temperature of the power battery is lower than the battery specified value, it means that the heat of the fuel-electric system itself is too high, that is, waste heat will be generated; at this time, the power battery is controlled to heat up through the battery heat exchanger connected to the fuel-electric system.

[0049] It can be seen from this that when the present invention detects that the temperature of the fuel-electric system is too high and waste heat is generated, it can use the waste heat with heat to heat the power battery and the fuel supply system, thereby realizing energy exchange between the fuel-electric system, the power battery and the fuel supply system, rationally utilizing resources and avoiding energy waste.

[0050] In a second aspect, an embodiment of the present application also provides a thermal management system for a commercial vehicle using a fuel cell, the system comprising a fuel-electric cooling subsystem, a fuel supply subsystem and a power battery subsystem; the fuel-electric cooling subsystem comprises a fuel-electric temperature control device, the fuel supply subsystem comprises a gasification device, and the power battery subsystem comprises a battery temperature control device.

[0051] See also Figure 1 As shown, the fuel-electric cooling subsystem and the fuel supply subsystem are connected via a fuel heat exchanger (HRQ3); the fuel-electric cooling subsystem and the power battery subsystem are connected via a battery heat exchanger (HRQ1).

[0052] The fuel-electricity cooling subsystem is used to monitor the temperature of the fuel-electricity system:

[0053] When the temperature of the fuel-electric system is above the specified value, the fuel-electric temperature control device is used to cool the fuel-electric system;

[0054] When the temperature of the fuel-electricity system is lower than the specified value of the fuel-electricity system, the fuel-electricity system is heated up by the fuel-electricity temperature control device.

[0055] The fuel supply subsystem is used to:

[0056] (1) When the temperature of the fuel-fired power system is lower than the specified value of the fuel-fired power system, the liquefied fuel is converted into gasified fuel through the gasification device and then transmitted to the fuel-fired power system;

[0057] (2) When the temperature of the fuel-fired power system is above the fuel-fired power specified value, the liquefied fuel is converted into gasified fuel through the fuel heat exchanger (HRQ3) and then transmitted to the fuel-fired power system.

[0058] The power battery subsystem is used to: monitor the temperature of the power battery:

[0059] When the temperature of the power battery is above the specified value of the battery, the power battery is cooled down by the battery temperature control device;

[0060] When the temperature of the power battery is lower than the specified value of the battery, the power battery is heated by the battery temperature control device.

[0061] When the temperature of the power battery is lower than the specified value of the battery and the temperature of the fuel-electric system is higher than the specified value of the fuel-electric system, the power battery is heated by the battery heat exchanger (HRQ1).

[0062] In one embodiment, see Figure 1 As shown, the system also includes a heat exchange circuit provided with a battery heat exchange shut-off valve (G1), and a battery heat exchanger (HRQ1) is also provided on the heat exchange circuit; when working, the heat exchange circuit is connected to the power battery and the fuel-electric system (FCS) respectively.

[0063] When the temperature of the power battery is lower than the specified value of the battery and the temperature of the fuel-electric system is higher than the specified value of the fuel-electric system, the battery heat exchange shut-off valve (G1) is opened. At this time, the waste heat generated by the fuel-electric system will flow into the power battery subsystem through the battery heat exchanger (HRQ1) in the heat exchange circuit, thereby achieving the purpose of heating the power battery.

[0064] In one embodiment, see Figure 1 As shown, the fuel-electric temperature control device specifically includes: a radiator, a fuel-electric heat dissipation water pump (water pump A) and a fuel-electric temperature sensor (T3). When working, the radiator, the fuel-electric heat dissipation water pump (water pump A), the fuel-electric temperature sensor (T3) and the fuel-electric system (FCS) form a fuel-electric heat dissipation circuit, and the pipes of the fuel-electric heat dissipation circuit are filled with coolant.

[0065] The fuel-electric temperature control device is used for: after the fuel-electric system is working, the fuel-electric cooling water pump (water pump A) is turned on, and the heat of the fuel-electric system (FCS) is transferred to the radiator for cooling during the circulation of the coolant in the fuel-electric cooling circuit, that is, the fuel-electric temperature sensor (T3) detects the outlet temperature of the fuel-electric system (FCS) in the fuel-electric cooling circuit, and is used to control the speed of the fuel-electric cooling water pump (water pump A) to stabilize the temperature of the coolant within the set range, specifically:

[0066] When the fuel-electricity temperature sensor (T3) detects that the water outlet temperature of the fuel-electricity system (FCS) is above the fuel-electricity specified value, the speed of the fuel-electricity cooling water pump (water pump A) is increased, thereby accelerating the flow rate of the coolant, thereby achieving cooling of the fuel-electricity system (FCS);

[0067] When the fuel-electric temperature sensor (T3) detects that the outlet temperature of the fuel-electric system (FCS) is lower than the fuel-electric specified value, the speed of the fuel-electric cooling water pump (water pump A) is reduced or the fuel-electric cooling water pump (water pump A) is turned off, thereby slowing down the flow rate of the coolant, thereby achieving heating for the fuel-electric system (FCS).

[0068] In one embodiment, the fuel supply subsystem includes a gas delivery pipeline, a fuel vaporization pipeline and a heat exchange vaporization pipeline are connected in parallel between the liquefied fuel storage tank and the gas delivery pipeline, the vaporization device is arranged on the fuel vaporization pipeline, and the fuel heat exchanger (HRQ3) is respectively arranged on the heat exchange vaporization pipeline and the above-mentioned fuel-electricity heat dissipation circuit.

[0069] When the temperature of the fuel-fired power system (FCS) is lower than the specified value of the fuel-fired power system, the liquefied fuel in the liquefied fuel storage tank is converted into gasified fuel through the gasification device on the fuel gasification pipeline, and then transmitted to the fuel-fired power system through the gas transmission pipeline;

[0070] When the temperature of the fuel-fired power system (FCS) is above the specified value of the fuel-fired power system, the liquefied fuel in the liquefied fuel storage tank is converted into gasified fuel through the fuel heat exchanger (HRQ3) on the heat exchange gasification pipeline, and then transmitted to the fuel-fired power system through the gas transmission pipeline.

[0071] For details, see Figure 1 As shown, a fuel heat exchange stop valve (G2) is arranged on the heat exchange gasification pipeline, the gasification device includes a gasifier and a gasification stop valve (G3), and a gas delivery stop valve (G4) and a one-way valve (DX) are arranged on the gas delivery pipeline.

[0072] When the fuel temperature sensor (T3) detects that the temperature of the fuel system (FCS) is lower than the fuel specified value, refer to Figure 2 As shown, the vaporization stop valve (G3) and the delivery stop valve (G4) are opened, and the fuel heat exchange stop valve (G2) is closed; the liquid fuel (liquid hydrogen) in the liquefied fuel storage tank (liquid hydrogen tank in the figure) is vaporized into gaseous fuel (gaseous hydrogen) through the vaporizer and heated to the set temperature, and then transmitted to the fuel-fired power system (FCS) through the one-way valve (DX).

[0073] When the fuel temperature sensor (T3) detects that the temperature of the fuel system (FCS) is above the fuel specified value, Figure 3 As shown, the fuel heat exchange stop valve (G2) and the delivery stop valve (G4) are opened, and the vaporization stop valve (G3) is closed; the liquid fuel (liquid hydrogen) in the liquefied fuel storage tank (liquid hydrogen tank in the figure) is vaporized into gaseous fuel (gaseous hydrogen) through the fuel heat exchanger (HRQ3) and heated to the set temperature, and then transmitted to the fuel-fired power system (FCS) through the one-way valve (DX).

[0074] For further information, see Figure 1 As shown, a buffer tank for buffering gas is also provided on the gas delivery pipeline.

[0075] In one embodiment, see Figure 1 As shown, the battery temperature control device includes a power battery cooling water pump (water pump B), a PTC heater (Positive Temperature Coefficient) and a battery temperature sensor (T1 and T2). When in use, the power battery cooling water pump (water pump B), the battery temperature sensor (T1 and T2), the PTC heater and the power battery form a battery cooling loop, and the pipes of the battery cooling loop are filled with coolant; the battery heat exchanger (HRQ1) is arranged on the battery cooling loop.

[0076] When the battery temperature sensor (T1 or T2) detects that the temperature of the power battery is within the battery temperature setting range, the power battery subsystem does not operate.

[0077] When the battery temperature sensor (T1 or T2) detects that the temperature of the power battery is above the battery temperature setting range, the speed of the power battery cooling water pump (water pump B) is increased, and the battery heat exchange shut-off valve (G1) is closed at this time; the coolant is driven to flow through the power battery cooling water pump (water pump B) to cool the power battery.

[0078] When the battery temperature sensor (T1 or T2) detects that the temperature of the power battery is lower than the battery temperature setting range, and the detection value of the fuel-electric temperature sensor (T3) is lower than the fuel-electric specified value, it means that the fuel-electric system itself does not have enough heat and cannot perform heat exchange; at this time, turn on the PTC heater to reduce the speed of the power battery cooling water pump (water pump B); heat the coolant through the PTC heater to increase the temperature of the power battery.

[0079] When the battery temperature sensor (T1 or T2) detects that the temperature of the power battery is lower than the battery temperature setting range, and the detection value of the fuel-electric temperature sensor (T3) is above the fuel-electric specified value, the fuel-electric system has generated waste heat; at this time, the power battery cooling water pump (water pump B) and the battery heat exchange shut-off valve (G1) are opened to achieve heat exchange between the waste heat generated by the fuel-electric system and the coolant through the battery heat exchanger (HRQ1), thereby heating the power battery.

[0080] See also Figure 1 As shown, the power battery subsystem also includes a refrigerant circuit, which is provided with an air-conditioning compressor, a condenser, an electronic expansion valve (PZF), and a pressure sensor (P), and the pipes of the refrigerant circuit are filled with refrigerant; the above-mentioned battery heat dissipation circuit and the refrigerant circuit are connected through a refrigerant heat exchanger.

[0081] The refrigerant circuit is used for: when the battery temperature sensor (T1 or T2) detects that the temperature of the power battery is above the battery temperature setting range, the air-conditioning compressor, condenser and electronic expansion valve (PZF) are turned on, and the refrigerant exchanges heat with the coolant in the battery cooling circuit through the refrigerant heat exchanger, thereby further cooling the power battery.

[0082] In a third aspect, an embodiment of the present application provides a thermal management device for a commercial vehicle using a fuel cell. The thermal management device for a commercial vehicle using a fuel cell can be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0083] Reference Figure 4 , Figure 4 The hardware structure diagram of the thermal management device of a commercial vehicle using a fuel cell involved in the embodiment of the present application is shown in FIG. In the embodiment of the present application, the thermal management device of a commercial vehicle using a fuel cell may include a processor, a memory, a communication interface, and a communication bus.

[0084] The communication bus may be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0085] The communication interface includes an input / output (I / O) interface, a physical interface, and a logical interface, etc., which are used to interconnect the devices inside the thermal management device of a commercial vehicle using a fuel cell, and an interface used to interconnect the thermal management device of a commercial vehicle using a fuel cell with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, an optical fiber interface, an ATM interface, etc.; the user device can be a display, a keyboard, etc.

[0086] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0087] The processor may be a general-purpose processor, which may call the thermal management program for a commercial vehicle using a fuel cell stored in the memory and execute the thermal management method for a commercial vehicle using a fuel cell provided in the embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the thermal management program for a commercial vehicle using a fuel cell is called may refer to the various embodiments of the thermal management method for a commercial vehicle using a fuel cell in the present application, which will not be repeated here.

[0088] Those skilled in the art will understand that Figure 4 The hardware structure shown in the figure does not constitute a limitation on the present application, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0089] In a fourth aspect, an embodiment of the present application also provides a computer-readable storage medium.

[0090] The computer-readable storage medium of the present application stores a thermal management program for a commercial vehicle using a fuel cell, wherein when the thermal management program for a commercial vehicle using a fuel cell is executed by a processor, the steps of the thermal management method for a commercial vehicle using a fuel cell as described above are implemented.

[0091] Among them, the method implemented when the thermal management program of a commercial vehicle using a fuel cell is executed can refer to the various embodiments of the thermal management method of a commercial vehicle using a fuel cell in this application, and will not be repeated here.

[0092] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0093] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0094] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0095] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0096] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0097] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0098] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0099] The above are only specific implementations of the embodiments of the present invention, but the protection scope of the embodiments of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the embodiments of the present invention, and these modifications or replacements should be included in the protection scope of the embodiments of the present invention. Therefore, the protection scope of the embodiments of the present invention shall be based on the protection scope of the claims.

Claims

1. A thermal management method for a commercial vehicle using a fuel cell, characterized in that: The method comprises the following steps: Monitor the temperature of the fuel-electric system and power battery of commercial vehicles; When the temperature of the fuel-electric system is above the specified value of the fuel-electric system, the liquid fuel in the fuel supply system is controlled to be gasified through the fuel heat exchanger connected to the fuel-electric system and then transmitted to the fuel-electric system; When the temperature of the fuel-electric system is above the fuel-electric specified value and the temperature of the power battery is below the battery specified value, the power battery is controlled to be heated through a battery heat exchanger connected to the fuel-electric system.

2. A thermal management system for a commercial vehicle using a fuel cell, characterized in that: The system includes a fuel-electric cooling subsystem, a fuel supply subsystem and a power battery subsystem; the fuel-electric cooling subsystem includes a fuel-electric temperature control device, the fuel supply subsystem includes a gasification device, and the power battery subsystem includes a battery temperature control device; The fuel-electric cooling subsystem and the fuel supply subsystem are connected via a fuel heat exchanger; The fuel-electric cooling subsystem and the power battery subsystem are connected via a battery heat exchanger; The fuel-electric cooling subsystem is used to: cool or cool the fuel-electric system through the fuel-electric temperature control device; The fuel supply subsystem is used to: when the temperature of the fuel-electricity system is lower than the specified value of fuel-electricity, convert the liquefied fuel into gasified fuel through the gasification device and then transmit it to the fuel-electricity system; when the temperature of the fuel-electricity system is higher than the specified value of fuel-electricity, convert the liquefied fuel into gasified fuel through the fuel heat exchanger and then transmit it to the fuel-electricity system; The power battery subsystem is used to: heat up or cool down the power battery through the battery temperature control device; when the temperature of the power battery is lower than the specified value of the battery and the temperature of the fuel-electric system is higher than the specified value of the fuel-electric system, heat up the power battery through the battery heat exchanger.

3. The thermal management system for a commercial vehicle using a fuel cell according to claim 2, characterized in that: The fuel-electricity temperature control device comprises: a radiator, a fuel-electricity heat dissipation water pump and a fuel-electricity temperature sensor; the use state of the fuel-electricity temperature control device is: the radiator, the fuel-electricity heat dissipation water pump, the fuel-electricity temperature sensor and the fuel-electricity system form a fuel-electricity heat dissipation loop, and the pipeline of the fuel-electricity heat dissipation loop is filled with coolant; The fuel-electric temperature control device is used to: increase the speed of the fuel-electric cooling water pump when the fuel-electric temperature sensor detects that the temperature of the fuel-electric system is above the fuel-electric specified value; reduce the speed of the fuel-electric cooling water pump when the fuel-electric temperature sensor detects that the temperature of the fuel-electric system is lower than the fuel-electric specified value.

4. The thermal management system for a commercial vehicle using a fuel cell according to claim 2, characterized in that: The fuel supply subsystem also includes a gas delivery pipeline. The use state of the fuel supply subsystem is: a fuel gasification pipeline and a heat exchange gasification pipeline are connected in parallel between the liquefied fuel storage tank and the gas delivery pipeline, the gasification device is arranged on the fuel gasification pipeline, and the fuel heat exchanger is arranged on the heat exchange gasification pipeline; When the temperature of the fuel-electric system is lower than the specified value of the fuel-electric system, the liquefied fuel in the liquefied fuel storage tank is converted into gasified fuel through the gasification device and then transmitted to the fuel-electric system through the gas transmission pipeline; When the temperature of the fuel-fired power system is above the specified value of the fuel-fired power system, the liquefied fuel in the liquefied fuel storage tank is converted into gasified fuel through the fuel heat exchanger and then transmitted to the fuel-fired power system through the gas transmission pipeline.

5. The thermal management system for a commercial vehicle using a fuel cell according to claim 4, characterized in that: The heat exchange gasification pipeline is provided with a fuel heat exchange stop valve, and the gasification device includes a gasifier and a gasification stop valve; the gas delivery pipeline is provided with a delivery stop valve and a one-way valve; When the temperature of the fuel-electric system is lower than the specified value of fuel-electric, the gasification stop valve and the delivery stop valve are opened, and the fuel heat exchange stop valve is closed; the liquid fuel in the liquefied fuel storage tank is gasified into gaseous fuel by the gasifier and then transmitted to the fuel-electric system through the one-way valve; When the temperature of the fuel-fired power system is above the specified value of the fuel-fired power system, the fuel heat exchange shut-off valve and the delivery shut-off valve are opened, and the vaporization shut-off valve is closed; the liquid fuel in the liquefied fuel storage tank is vaporized into gaseous fuel through the fuel heat exchanger and then transmitted to the fuel-fired power system through the one-way valve.

6. The thermal management system for a commercial vehicle using a fuel cell according to claim 5, characterized in that: The gas delivery pipeline is also provided with a buffer tank for buffering gas.

7. The thermal management system for a commercial vehicle using a fuel cell according to claim 2, characterized in that: The battery temperature control device comprises a power battery cooling water pump, a heater and a battery temperature sensor; the battery temperature control device is in use when: the power battery cooling water pump, the battery temperature sensor, the heater and the power battery form a battery cooling loop, and the pipe of the battery cooling loop is filled with coolant; the battery heat exchanger is arranged on the battery cooling loop; When the battery temperature sensor detects that the temperature of the power battery is above the battery temperature setting range, the speed of the power battery cooling water pump is increased, and the power battery cooling water pump drives the coolant to flow to cool the power battery; When the battery temperature sensor detects that the temperature of the power battery is lower than the battery temperature setting range, and the temperature of the fuel-electric system is lower than the fuel-electric specified value, the heater turns on, reduces the speed of the power battery cooling water pump, and heats the coolant through the heater; When the battery temperature sensor detects that the temperature of the power battery is lower than the battery temperature setting range and the temperature of the fuel-electric system is above the fuel-electric specified value, the power battery cooling water pump is turned on to exchange the heat generated by the fuel-electric system with the coolant through the battery heat exchanger.

8. The thermal management system for a commercial vehicle using a fuel cell according to claim 7, characterized in that: The system also includes a heat exchange circuit provided with a battery heat exchange cut-off valve, and the battery heat exchanger is arranged on the heat exchange circuit; the heat exchange circuit is connected to the fuel-electric system; When the temperature of the power battery is lower than the specified value of the battery and the temperature of the fuel-electric system is higher than the specified value of the fuel-electric system, the battery heat exchange shut-off valve opens.

9. The thermal management system for a commercial vehicle using a fuel cell according to claim 7, characterized in that: The power battery subsystem further includes a refrigerant circuit, on which an air-conditioning compressor, a condenser and an electronic expansion valve are arranged, and the pipeline of the refrigerant circuit is filled with refrigerant; the battery heat dissipation circuit and the refrigerant circuit are connected via a refrigerant heat exchanger; The refrigerant circuit is used for: When the battery temperature sensor detects that the temperature of the power battery is above the battery temperature setting range, the air-conditioning compressor, condenser and electronic expansion valve are opened, and the refrigerant exchanges heat with the coolant in the battery cooling circuit through the refrigerant heat exchanger.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a thermal management program for a commercial vehicle using a fuel cell, wherein when the thermal management program for a commercial vehicle using a fuel cell is executed, the steps of the thermal management method for a commercial vehicle using a fuel cell as claimed in claim 1 are implemented.

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