Fuel cell air system, control method and device thereof and storage medium

Abstract

The invention discloses a fuel cell air system, a control method and device thereof and a storage medium, the system comprises a liquid water separator, an air turbine and a back pressure regulator, and the method comprises the following steps: obtaining the liquid level height of the liquid water separator; generating a liquid water quantity adjusting instruction according to the liquid level height of the liquid water separator; and controlling a backpressure regulator or an air turbine according to the liquid water quantity regulation instruction so as to reduce the quantity of liquid water entering the air turbine. Thus, the air turbine is prevented from working in a humid state for a long time, the air turbine is protected from being eroded by liquid water, and therefore the service life of the air turbine is prolonged, and the size of the liquid water separator is minimized.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell air systems, and in particular to a control method for a fuel cell air system, a computer-readable storage medium, a control device for a fuel cell air system, and a fuel cell air system. Background Art

[0002] A fuel cell air module typically consists of a compressor that increases the air pressure inside the air module, and a humidifier (to humidify the fresh intake air from the fuel cell stack outlet gas) to provide the necessary air for the fuel cell stack to react with hydrogen. If the air module includes an air turbine, a water separator is required to protect the turbine from water corrosion.

[0003] Typically, a water separator is used to remove liquid water. However, in operating modes that generate a large amount of liquid water, such as cold start or preheating mode, the water separator is very likely to be unable to separate all the liquid water. On the one hand, some liquid water enters the air turbine and causes droplet erosion, affecting the service life of the turbine. On the other hand, although the size of the liquid water separator can be increased to enable it to separate more liquid water, a larger-sized water separator will greatly increase the system design cost. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the first object of the present invention is to provide a control method for a fuel cell air system, which can prevent the air turbine from working in a humid state for a long time, protect the air turbine from being corroded by liquid water, thereby extending the service life of the air turbine and facilitating minimizing the size of the liquid water separator.

[0005] A second object of the present invention is to provide a computer-readable storage medium.

[0006] The third object of the present invention is to provide a control device for a fuel cell air system.

[0007] A fourth object of the present invention is to provide a fuel cell air system.

[0008] To achieve the above-mentioned purpose, an embodiment of the first aspect of the present invention proposes a control method for a fuel cell air system, wherein the system includes a liquid water separator, an air turbine and a back pressure regulator, and the method includes: obtaining the liquid level height of the liquid water separator; generating a liquid water quantity adjustment instruction according to the liquid level height of the liquid water separator; and controlling the back pressure regulator or the air turbine according to the liquid water quantity adjustment instruction to reduce the amount of liquid water entering the air turbine.

[0009] According to the control method of the fuel cell air system of the embodiment of the present invention, the liquid level height of the liquid water separator can be obtained, and a liquid water quantity adjustment instruction can be generated according to the liquid level height of the liquid water separator, and the back pressure regulator or the air turbine can be controlled according to the liquid water quantity adjustment instruction to reduce the amount of liquid water entering the air turbine. Thus, the air turbine is prevented from working in a humid state for a long time, and the air turbine is protected from liquid water erosion, thereby extending the service life of the air turbine and minimizing the size of the liquid water separator.

[0010] In addition, the control method of the fuel cell air system according to the above embodiment of the present invention may also include the following additional technical features:

[0011] According to one embodiment of the present invention, the back pressure regulator is arranged between the gas outlet of the liquid water separator and the air inlet of the air turbine, and the back pressure regulator is controlled according to the liquid water amount adjustment instruction, including: if the liquid level height of the liquid water separator is greater than or equal to a preset liquid level upper limit value, then the back pressure regulator is controlled to bypass the air turbine; if the liquid level height of the liquid water separator is less than a preset liquid level lower limit value, then the back pressure regulator is controlled to connect the liquid water separator and the air turbine.

[0012] According to one embodiment of the present invention, the back-pressure regulator is arranged at the exhaust port of the air turbine, and the back-pressure regulator is controlled according to the liquid water volume adjustment instruction, including: if the liquid level height of the liquid water separator is greater than or equal to a preset liquid level upper limit value, then increasing the opening of the back-pressure regulator to reduce the pressure in the air turbine; if the liquid level height of the liquid water separator is less than a preset liquid level lower limit value, then reducing the opening of the back-pressure regulator to increase the pressure in the air turbine.

[0013] According to one embodiment of the present invention, the air turbine is a variable airflow turbocharger, and the air turbine is controlled according to the liquid water amount adjustment instruction, including: if the liquid level of the liquid water separator is greater than or equal to a preset liquid level upper limit, then increasing the variable cross-section of the variable airflow turbocharger to reduce the pressure inside the air turbine; if the liquid level of the liquid water separator is less than a preset liquid level lower limit, then reducing the variable cross-section of the variable airflow turbocharger to increase the pressure inside the air turbine.

[0014] To achieve the above-mentioned purpose, a computer-readable storage medium is proposed in the second aspect of the present invention, on which a control program of a fuel cell air system is stored. When the control program of the fuel cell air system is executed by a processor, the control method of the fuel cell air system of the above-mentioned embodiment of the present invention is implemented.

[0015] According to the computer-readable storage medium of an embodiment of the present invention, by means of a processor executing the control program of the fuel cell air system stored thereon, it is possible to prevent the air turbine from operating in a humid state for a long time, protect the air turbine from erosion by liquid water, thereby extending the service life of the air turbine and facilitating minimizing the size of the liquid water separator.

[0016] To achieve the above-mentioned purpose, the third aspect of the present invention proposes a control device for a fuel cell air system, wherein the system includes a liquid water separator, an air turbine and a back pressure regulator, and the device includes: an acquisition module for acquiring the liquid level height of the liquid water separator; a generation module for generating a liquid water volume adjustment instruction according to the liquid level height of the liquid water separator; and a control module for controlling the back pressure regulator or the air turbine according to the liquid water volume adjustment instruction to reduce the amount of liquid water entering the air turbine.

[0017] According to the control device of the fuel cell air system of the embodiment of the present invention, the liquid level height of the liquid water separator is obtained by the acquisition module, and the liquid water amount adjustment instruction is generated by the generation module according to the liquid level height of the liquid water separator, and the back pressure regulator or the air turbine is controlled by the control module according to the liquid water amount adjustment instruction to reduce the amount of liquid water entering the air turbine. Thus, the air turbine is prevented from working in a humid state for a long time, and the air turbine is protected from liquid water erosion, thereby extending the service life of the air turbine and minimizing the size of the liquid water separator.

[0018] In addition, the control device of the fuel cell air system according to the above embodiment of the present invention may also have the following additional technical features:

[0019] According to one embodiment of the present invention, the back pressure regulator is arranged between the gas outlet of the liquid water separator and the air inlet of the air turbine, and the control module is used to control the back pressure regulator to bypass the air turbine if the liquid level height of the liquid water separator is greater than or equal to a preset liquid level upper limit value; if the liquid level height of the liquid water separator is less than a preset liquid level lower limit value, control the back pressure regulator to connect the liquid water separator and the air turbine.

[0020] According to one embodiment of the present invention, the back-pressure regulator is arranged at the exhaust port of the air turbine, and the control module is used to increase the opening of the back-pressure regulator to reduce the pressure in the air turbine if the liquid level height of the liquid water separator is greater than or equal to a preset liquid level upper limit value; if the liquid level height of the liquid water separator is less than a preset liquid level lower limit value, reduce the opening of the back-pressure regulator to increase the pressure in the air turbine.

[0021] According to one embodiment of the present invention, the air turbine is a variable airflow turbocharger, and the control module is used to increase the variable cross-section of the variable airflow turbocharger to reduce the pressure inside the air turbine if the liquid level height of the liquid water separator is greater than or equal to a preset liquid level upper limit value; if the liquid level height of the liquid water separator is less than a preset liquid level lower limit value, reduce the variable cross-section of the variable airflow turbocharger to increase the pressure inside the air turbine.

[0022] To achieve the above-mentioned purpose, a fuel cell air system provided in an embodiment of a fourth aspect of the present invention includes a control device for the fuel cell air system as in the above-mentioned embodiment of the present invention.

[0023] According to the fuel cell air system of an embodiment of the present invention, by adopting the aforementioned fuel cell air system control device, it is possible to prevent the air turbine from working in a humid state for a long time, protect the air turbine from erosion by liquid water, thereby extending the service life of the air turbine and facilitating minimizing the size of the liquid water separator.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a flow chart of a method for controlling a fuel cell air system according to an embodiment of the present invention;

[0026] Figure 2 is a schematic structural diagram of a fuel cell air system according to a specific embodiment of the present invention;

[0027] Figure 3 is a schematic structural diagram of a fuel cell air system according to a specific embodiment of the present invention;

[0028] Figure 4 is a schematic structural diagram of a fuel cell air system according to a specific embodiment of the present invention;

[0029] Figure 5 A block diagram of a control device for a fuel cell air system according to an embodiment of the present invention;

[0030] Figure 6 A block diagram of a fuel cell air system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] A control method of a fuel cell air system, a computer-readable storage medium, a control device of a fuel cell air system, and a fuel cell air system according to embodiments of the present invention will be described below with reference to the accompanying drawings.

[0033] Figure 1 4 is a flow chart of a control method of a fuel cell air system according to an embodiment of the present invention.

[0034] Specifically, in some embodiments of the present invention, the fuel cell air system includes a liquid water separator, an air turbine and a back pressure regulator, wherein Figure 1 As shown, a control method for a fuel cell air system includes:

[0035] S101, obtaining the liquid level height of the liquid water separator.

[0036] It can be understood that in this embodiment of the present invention, the liquid level height of the liquid water separator can be obtained in real time by the liquid level transmitter, and the liquid level height can be fed back to the liquid level controller, wherein the liquid level height of the liquid water separator can be used to characterize the liquid water separation ability of the liquid water separator, and the liquid water separation ability of the liquid water separator increases with the decrease of the liquid level height of the liquid water separator.

[0037] S102, generating a liquid water volume adjustment instruction according to the liquid level height of the liquid water separator.

[0038] It can be understood that in this embodiment of the present invention, after receiving the liquid level height of the liquid water separator fed back by the liquid level transmitter, the liquid level controller can generate a corresponding liquid water volume adjustment instruction according to the liquid level height of the liquid water separator, so as to utilize the liquid water volume adjustment instruction to realize the back pressure adjustment of the air turbine.

[0039] S103, controlling the back pressure regulator or the air turbine according to the liquid water amount adjustment instruction to reduce the amount of liquid water entering the air turbine.

[0040] It can be understood that in this embodiment of the present invention, the liquid level controller can control the back pressure regulator or the air turbine according to the liquid water amount adjustment instruction to achieve back pressure adjustment of the air turbine, thereby reducing the amount of liquid water entering the air turbine, thereby avoiding the air turbine from working in a humid state for a long time, protecting the air turbine from liquid water erosion, thereby extending the service life of the air turbine and helping to minimize the size of the liquid water separator.

[0041] Further, in some embodiments of the present invention, Figure 2 As shown, the back pressure regulator 101 can be arranged between the gas outlet of the liquid water separator 102 and the air inlet of the air turbine 103, and the back pressure regulator is controlled according to the liquid water amount adjustment instruction, including: if the liquid level height of the liquid water separator is greater than or equal to the preset liquid level upper limit value, then the back pressure regulator is controlled to bypass the air turbine; if the liquid level height of the liquid water separator is less than the preset liquid level lower limit value, then the back pressure regulator is controlled to connect the liquid water separator and the air turbine.

[0042] It can be understood that in this embodiment of the present invention, the back pressure regulator can be arranged between the gas outlet of the liquid water separator and the air inlet of the air turbine to play a role similar to a bypass valve, wherein when the liquid level height of the liquid water separator is greater than or equal to the preset liquid level upper limit value, the liquid water separator reaches saturation in its separation capacity for liquid water, and there is a risk of liquid water entering the air turbine. At this time, the air turbine can be bypassed by controlling the back pressure regulator so that the air flow with liquid water bypasses the air turbine, thereby reducing the amount of liquid water entering the air turbine, and when the liquid level height of the liquid water separator is less than the preset liquid level lower limit value, the liquid water separator has the ability to separate liquid water. At this time, the liquid water separator and the air turbine can be connected by controlling the back pressure regulator so that the air flow flows through the air turbine, thereby meeting the working requirements of the fuel cell air system. In this way, the air turbine is prevented from working in a humid state for a long time, and the air turbine is protected from liquid water erosion, thereby extending the service life of the air turbine and minimizing the size of the liquid water separator.

[0043] Further, in some embodiments of the present invention, Figure 3 As shown, the back pressure regulator 101 can be arranged at the exhaust port of the air turbine 103, and the back pressure regulator is controlled according to the liquid water volume adjustment instruction, including: if the liquid level height of the liquid water separator is greater than or equal to the preset liquid level upper limit value, then the opening of the back pressure regulator is increased to reduce the pressure in the air turbine; if the liquid level height of the liquid water separator is less than the preset liquid level lower limit value, then the opening of the back pressure regulator is reduced to increase the pressure in the air turbine.

[0044] It can be understood that, since the water storage capacity of the gas also depends on the pressure and temperature of the gas, in this embodiment of the present invention, the back pressure regulator can be arranged at the exhaust port of the air turbine to play a role similar to that of a solenoid valve, wherein, when the liquid level height of the liquid water separator is greater than or equal to the preset liquid level upper limit value, the liquid water separator reaches saturation in its separation capacity for liquid water, and there is a risk of liquid water entering the air turbine. At this time, the pressure in the air turbine can be reduced by increasing the opening of the back pressure regulator, thereby reducing the amount of liquid water entering the air turbine, and, when the liquid level height of the liquid water separator is less than the preset liquid level lower limit value, the liquid water separator has the ability to separate liquid water, and at this time, the pressure in the air turbine can be increased by reducing the opening of the back pressure regulator, thereby meeting the working requirements of the fuel cell air system. Thus, the air turbine is prevented from working in a humid state for a long time, and the air turbine is protected from liquid water erosion, thereby extending the service life of the air turbine and minimizing the size of the liquid water separator.

[0045] Further, in some embodiments of the present invention, Figure 4 As shown, the air turbine 103 is a variable airflow turbocharger (VNT), which controls the air turbine according to the liquid water quantity adjustment instruction, including: if the liquid level height of the liquid water separator is greater than or equal to the preset liquid level upper limit value, then the variable cross-section of the variable airflow turbocharger is increased to reduce the pressure in the air turbine; if the liquid level height of the liquid water separator is less than the preset liquid level lower limit value, then the variable cross-section of the variable airflow turbocharger is reduced to increase the pressure in the air turbine.

[0046] It can be understood that, since the water storage capacity of the gas also depends on the pressure and temperature of the gas, in this embodiment of the present invention, the air turbine can be set as a variable airflow turbocharger, wherein, when the liquid level height of the liquid water separator is greater than or equal to the preset liquid level upper limit value, the liquid water separator reaches saturation in its separation capacity for liquid water, and there is a risk of liquid water entering the air turbine. At this time, the variable cross section of the variable airflow turbocharger can be increased to reduce the pressure in the air turbine, thereby reducing the amount of liquid water entering the air turbine, and when the liquid level height of the liquid water separator is less than the preset liquid level lower limit value, the liquid water separator has the ability to separate liquid water, and at this time, the variable cross section of the variable airflow turbocharger can be reduced to increase the pressure in the air turbine, thereby meeting the working requirements of the fuel cell air system. In this way, the air turbine is prevented from working in a humid state for a long time, and the air turbine is protected from liquid water erosion, thereby extending the service life of the air turbine and minimizing the size of the liquid water separator.

[0047] It should be noted that, in the above-mentioned embodiment of the present invention, the internal pressure of the air turbine can be adjusted by adjusting the geometric shape (ie, the variable cross-section) of the variable airflow turbocharger, thereby adjusting the amount of liquid water entering the air turbine.

[0048] In summary, according to the control method of the fuel cell air system of the embodiment of the present invention, the liquid level height of the liquid water separator can be obtained, and a liquid water volume adjustment instruction can be generated according to the liquid level height of the liquid water separator, and the back pressure regulator or the air turbine can be controlled according to the liquid water volume adjustment instruction to reduce the amount of liquid water entering the air turbine. In this way, the air turbine is prevented from working in a humid state for a long time, and the air turbine is protected from liquid water erosion, thereby extending the service life of the air turbine and minimizing the size of the liquid water separator.

[0049] Based on the control method of the fuel cell air system of the aforementioned embodiment of the present invention, the embodiment of the present invention also proposes a computer-readable storage medium, on which a control program of the fuel cell air system is stored. When the control program of the fuel cell air system is executed by a processor, the control method of the fuel cell air system as in the aforementioned embodiment of the present invention is implemented.

[0050] It should be noted that the specific implementation of the computer-readable storage medium of the embodiment of the present invention can refer to the specific implementation of the control method of the fuel cell air system of the aforementioned embodiment of the present invention, and will not be repeated here to reduce redundancy.

[0051] In summary, according to the computer-readable storage medium of an embodiment of the present invention, by means of a processor executing the control program of the fuel cell air system stored thereon, it is possible to prevent the air turbine from operating in a humid state for a long time, protect the air turbine from erosion by liquid water, thereby extending the service life of the air turbine and facilitating minimizing the size of the liquid water separator.

[0052] Figure 5 A block diagram of a control device for a fuel cell air system according to an embodiment of the present invention.

[0053] Specifically, in some embodiments of the present invention, the fuel cell air system includes a liquid water separator, an air turbine and a back pressure regulator, such as Figure 5 As shown, the control device 100 of the fuel cell air system includes: an acquisition module 10 , a generation module 20 and a control module 30 .

[0054] Among them, the acquisition module 10 is used to obtain the liquid level height of the liquid water separator; the generation module 20 is used to generate a liquid water volume adjustment instruction according to the liquid level height of the liquid water separator; the control module 30 is used to control the back pressure regulator or the air turbine according to the liquid water volume adjustment instruction to reduce the amount of liquid water entering the air turbine.

[0055] Furthermore, in some embodiments of the present invention, a back pressure regulator is disposed between the gas outlet of the liquid water separator and the air inlet of the air turbine, and the control module 30 is used to control the back pressure regulator to bypass the air turbine if the liquid level of the liquid water separator is greater than or equal to a preset upper limit of the liquid level; and to control the back pressure regulator to connect the liquid water separator and the air turbine if the liquid level of the liquid water separator is less than a preset lower limit of the liquid level.

[0056] Furthermore, in some embodiments of the present invention, a back pressure regulator is disposed at the exhaust port of the air turbine, and the control module 30 is used to increase the opening of the back pressure regulator to reduce the pressure in the air turbine if the liquid level of the liquid water separator is greater than or equal to a preset liquid level upper limit; if the liquid level of the liquid water separator is less than a preset liquid level lower limit, reduce the opening of the back pressure regulator to increase the pressure in the air turbine.

[0057] Furthermore, in some embodiments of the present invention, the air turbine is a variable airflow turbocharger, and the control module 30 is used to increase the variable cross-section of the variable airflow turbocharger to reduce the pressure inside the air turbine if the liquid level of the liquid water separator is greater than or equal to a preset liquid level upper limit; if the liquid level of the liquid water separator is less than a preset liquid level lower limit, reduce the variable cross-section of the variable airflow turbocharger to increase the pressure inside the air turbine.

[0058] It should be noted that the specific implementation of the control device of the fuel cell air system of the embodiment of the present invention corresponds one to one with the specific implementation of the control method of the fuel cell air system of the aforementioned embodiment of the present invention, and will not be repeated here to reduce redundancy.

[0059] In summary, according to the control device of the fuel cell air system of the embodiment of the present invention, the liquid level height of the liquid water separator is obtained by the acquisition module, and the liquid water volume adjustment instruction is generated by the generation module according to the liquid level height of the liquid water separator, and the back pressure regulator or the air turbine is controlled by the control module according to the liquid water volume adjustment instruction to reduce the amount of liquid water entering the air turbine. In this way, the air turbine is prevented from working in a humid state for a long time, and the air turbine is protected from liquid water erosion, thereby extending the service life of the air turbine and minimizing the size of the liquid water separator.

[0060] Figure 6 A block diagram of a fuel cell air system according to an embodiment of the present invention.

[0061] Specifically, in some embodiments of the present invention, Figure 6 As shown, the fuel cell air system 1000 includes the control device 100 of the fuel cell air system according to the aforementioned embodiment of the present invention.

[0062] It should be noted that the specific implementation of the fuel cell air system of the embodiment of the present invention corresponds one to one with the specific implementation of the control method of the fuel cell air system of the aforementioned embodiment of the present invention, and will not be repeated here to reduce redundancy.

[0063] In summary, according to the fuel cell air system of an embodiment of the present invention, by adopting the aforementioned fuel cell air system control device, it is possible to prevent the air turbine from working in a humid state for a long time, protect the air turbine from liquid water erosion, thereby extending the service life of the air turbine and helping to minimize the size of the liquid water separator.

[0064] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0065] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0067] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0068] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0069] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0071] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A control method for a fuel cell air system, characterized in that: The system includes a liquid water separator, an air turbine and a back pressure regulator, and the method includes: Obtaining the liquid level height of the liquid water separator; generating a liquid water volume adjustment instruction according to the liquid level height of the liquid water separator; The back pressure regulator or the air turbine is controlled according to the liquid water amount adjustment instruction to reduce the amount of liquid water entering the air turbine.

2. The control method of the fuel cell air system according to claim 1, characterized in that: The back pressure regulator is disposed between the gas outlet of the liquid water separator and the air inlet of the air turbine, and the back pressure regulator is controlled according to the liquid water amount adjustment instruction, including: If the liquid level of the liquid water separator is greater than or equal to a preset liquid level upper limit, controlling the back pressure regulator to bypass the air turbine; If the liquid level of the liquid water separator is less than a preset lower limit of the liquid level, the back pressure regulator is controlled to connect the liquid water separator and the air turbine.

3. The control method of the fuel cell air system according to claim 1, characterized in that: The back pressure regulator is disposed at the exhaust port of the air turbine, and the back pressure regulator is controlled according to the liquid water volume adjustment instruction, including: If the liquid level of the liquid water separator is greater than or equal to a preset upper limit of the liquid level, increasing the opening of the back pressure regulator to reduce the pressure in the air turbine; If the liquid level of the liquid water separator is less than a preset lower limit of the liquid level, the opening of the back pressure regulator is reduced to increase the pressure in the air turbine.

4. The control method of the fuel cell air system according to claim 1, characterized in that: The air turbine is a variable airflow turbocharger, and the air turbine is controlled according to the liquid water amount adjustment instruction, including: If the liquid level of the liquid water separator is greater than or equal to a preset upper limit of the liquid level, increasing the variable cross-section of the variable airflow turbocharger to reduce the pressure in the air turbine; If the liquid level of the liquid water separator is less than a preset lower limit of the liquid level, the variable cross-section of the variable airflow turbocharger is reduced to increase the pressure in the air turbine.

5. A computer-readable storage medium, characterized in that: A control program of a fuel cell air system is stored thereon, and when the control program of the fuel cell air system is executed by a processor, a control method of a fuel cell air system as claimed in any one of claims 1 to 4 is implemented.

6. A control device for a fuel cell air system, characterized in that: The system comprises a liquid water separator, an air turbine and a back pressure regulator, and the device comprises: An acquisition module, used for acquiring the liquid level height of the liquid water separator; A generating module, used for generating a liquid water volume adjustment instruction according to the liquid level height of the liquid water separator; A control module is used to control the back pressure regulator or the air turbine according to the liquid water amount adjustment instruction to reduce the amount of liquid water entering the air turbine.

7. The control device of the fuel cell air system according to claim 6, characterized in that: The back pressure regulator is arranged between the gas outlet of the liquid water separator and the air inlet of the air turbine, and the control module is used to control the back pressure regulator to bypass the air turbine if the liquid level height of the liquid water separator is greater than or equal to the preset liquid level upper limit value; if the liquid level height of the liquid water separator is less than the preset liquid level lower limit value, control the back pressure regulator to connect the liquid water separator and the air turbine.

8. The control device of the fuel cell air system according to claim 6, characterized in that: The back-pressure regulator is arranged at the exhaust port of the air turbine, and the control module is used to increase the opening of the back-pressure regulator to reduce the pressure in the air turbine if the liquid level height of the liquid water separator is greater than or equal to the preset liquid level upper limit value; if the liquid level height of the liquid water separator is less than the preset liquid level lower limit value, reduce the opening of the back-pressure regulator to increase the pressure in the air turbine.

9. The control device of the fuel cell air system according to claim 6, characterized in that: The air turbine is a variable airflow turbocharger, and the control module is used to increase the variable cross-section of the variable airflow turbocharger to reduce the pressure inside the air turbine if the liquid level height of the liquid water separator is greater than or equal to a preset liquid level upper limit value; if the liquid level height of the liquid water separator is less than a preset liquid level lower limit value, reduce the variable cross-section of the variable airflow turbocharger to increase the pressure inside the air turbine.

10. A fuel cell air system, characterized in that: The fuel cell air system comprises a control device for the fuel cell air system according to any one of claims 6-9.

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