Hydrogen fuel power plant and control method

Abstract

The application discloses a hydrogen fuel power generation device and a control method, which comprise a stack module, a first transmission module, a second transmission module, a humidity detection module and a control module. The stack module is provided with a membrane electrode assembly in a cavity to be separated into a first chamber and a second chamber. The stack module is provided with a first air inlet communicated with the first chamber and a second air inlet communicated with the second chamber. The first transmission module is docked with the first air inlet, and the second transmission module is docked with the second air inlet. The humidity detection module is used for detecting a humidity detection value in the first chamber. The control module is electrically connected with the humidity detection module and at least one of the first transmission module and the second transmission module to control the pressure difference on both sides of the membrane electrode assembly by controlling the operation of at least one of the first transmission module and the second transmission module, so that the humidity detection value is in a humidity preset range. The design optimizes the structure, reduces the production cost and reduces the volume.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy, in particular to a hydrogen fuel power generation device and a control method. BACKGROUND

[0002] With the rapid development and increasing demand of hydrogen fuel cell technology, the application field of hydrogen fuel cell is continuously expanding. Currently, hydrogen fuel cell is mainly applied to vehicle power and other application scenarios, and basically provides high-power power supply. Therefore, the structure is complex and the manufacturing cost is high.

[0003] Specifically, the hydrogen fuel cell generally includes a stack module, a membrane electrode assembly is arranged in the stack module to divide the stack module cavity into a first chamber and a second chamber, a catalytic material is arranged in the first chamber, and when the reaction is performed, hydrogen is provided for the first chamber and oxygen or air is provided for the second chamber. Hydrogen is catalyzed by the catalytic material to generate hydrogen ions and passes through the membrane electrode assembly, and the catalyst surface in the second chamber reacts with oxygen to output electric energy to the external circuit. However, the precondition for the proton exchange membrane to transmit hydrogen ions is to be in a relatively humid environment.

[0004] Therefore, in the past, high-power hydrogen fuel cells need to be equipped with humidifiers, water vapor separators and other equipment. Hydrogen enters the first chamber after being humidified by the humidifier, continuously humidifies the membrane electrode assembly and reacts, at the same time, the excess hydrogen leaves the first chamber and needs to be dried by the water vapor separator, so that the hydrogen is in a relatively dry state (at least cannot form water droplets). Therefore, the volume and weight of the hydrogen fuel cell are relatively large, which is not suitable for small power scenarios. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a hydrogen fuel power generation device and a control method, which optimizes the structure, reduces the production cost, reduces the volume, reduces the weight and improves the compatibility.

[0006] The hydrogen fuel power generation device according to the first aspect of the present application comprises: a stack module, which is internally provided with a cavity, and is provided with a membrane electrode assembly in the cavity, the membrane electrode assembly divides the cavity into a first chamber and a second chamber, the stack module is provided with a first gas inlet communicating with the first chamber and a second gas inlet communicating with the second chamber; a first transmission module, which is connected to the first gas inlet to input hydrogen into the first chamber; a second transmission module, which is connected to the second gas inlet to input oxygen or air into the second chamber; a humidity detection module, which is used to detect a humidity detection value in the first chamber; and a control module, which is electrically connected to the humidity detection module, and is electrically connected to at least one of the first transmission module and the second transmission module to control the pressure difference on both sides of the membrane electrode assembly by controlling the operation of at least one of the first transmission module and the second transmission module, so that the humidity detection value is in a preset humidity range.

[0007] The hydrogen fuel power generation device according to the present application has at least the following beneficial effects:

[0008] The hydrogen fuel power generation device according to the present application has at least the following beneficial effects:

[0009] According to some embodiments of the present application, the stack module is further provided with a first gas outlet communicating with the first chamber, the stack module is provided with a first catalytic assembly in the first chamber, the first catalytic assembly is located between the first gas inlet and the first gas outlet, the first transmission module comprises a first gas supply pipe group and a recovery pipe group, one end of the first gas supply pipe group is used for connecting with a gas source, one end of the recovery pipe group communicates with the first gas outlet in a butt joint manner, and the other end of the recovery pipe group communicates with the other end of the first gas supply pipe group and the first gas inlet in a butt joint manner respectively.

[0010] According to some embodiments of the present application, the first gas supply pipe group comprises a first constant pressure valve, one end of the first constant pressure valve is used for connecting with the gas source through a pipeline, the other end of the first constant pressure valve communicates with the other end of the first gas supply pipe group and the first gas inlet in a butt joint manner through a pipeline respectively, and the control module is connected with the first constant pressure valve.

[0011] According to some embodiments of the present application, the recovery pipe group comprises a one-way valve, a booster pump and a proportional valve, the one-way valve, the booster pump and the proportional valve are connected through pipelines to constitute at least part of a recovery pipeline, one end of the recovery pipeline communicates with the first gas outlet in a butt joint manner, and the other end of the recovery pipeline communicates with the other end of the first gas supply pipe group and the first gas inlet in a butt joint manner respectively.

[0012] According to some embodiments of the present application, the stack module is further provided with a second gas outlet communicating with the second chamber, the stack module is provided with a second catalytic assembly in the second chamber, the second catalytic assembly is located between the second gas inlet and the second gas outlet, the second transmission module comprises a second gas supply pipe group and an exhaust pipe group, the second gas supply pipe group communicates with the second gas inlet in a butt joint manner, and the exhaust pipe group communicates with the second gas outlet in a butt joint manner.

[0013] According to some embodiments of the present application, the second gas supply pipe group comprises a blower and a second constant pressure valve, one end of the second constant pressure valve is connected with the blower through a pipeline, the other end of the second constant pressure valve communicates with the second gas inlet in a butt joint manner through a pipeline, the exhaust pipe group comprises a third constant pressure valve, one end of the third constant pressure valve communicates with the second gas outlet in a butt joint manner through a pipeline, and the control module is connected with the second constant pressure valve and the third constant pressure valve respectively.

[0014] According to some embodiments of the present application, the stack module is provided with a temperature detection module in the first chamber, and the temperature detection module is connected with the control module.

[0015] According to some embodiments of the present application, the hydrogen fuel power generation device further comprises a charging and discharging module, an energy storage module and an inverter module, the charging and discharging module is connected with the stack module, the energy storage module and the inverter module respectively, and the control module is connected with the charging and discharging module.

[0016] According to the control method of the second aspect of the embodiments of the present application, the control method is applied to the hydrogen fuel power generation device disclosed in any of the above embodiments, and the control method comprises: controlling at least one of the first transmission module and the second transmission module to operate, so that the gas pressure of the first chamber is higher than the gas pressure of the second chamber; obtaining the humidity detection value; when the humidity detection value is higher than the humidity preset range, controlling at least one of the first transmission module and the second transmission module to operate, so that the gas pressure difference between the first chamber and the second chamber is increased; and when the humidity detection value is lower than the humidity preset range, controlling at least one of the first transmission module and the second transmission module to operate, so that the gas pressure difference between the first chamber and the second chamber is reduced.

[0017] According to the control method of the embodiments of the present application, at least the following beneficial effects are achieved:

[0018] According to the control method of the present application, by controlling at least one of the first transmission module and the second transmission module, the gas pressure difference between the two sides of the membrane electrode assembly is adjusted, on the basis of satisfying the low hydrogen and oxygen flow and the slightly higher gas pressure on the hydrogen side than on the oxygen side, the gas pressure values on the two sides of the membrane electrode assembly are reduced, so that water can penetrate from the oxygen side to the hydrogen side of the membrane electrode assembly, at this time, when hydrogen flows through the membrane electrode assembly, it combines with the water that has penetrated to reach the reaction condition of humidity, in addition, the humidity of the first chamber is detected by the humidity detection module, when the humidity is too high, the gas pressure difference between the two sides of the membrane electrode assembly is increased to prevent the humidity of hydrogen from being too high, and at the same time, the humidity can be adjusted when it is too low, so that the hydrogen fuel power generation device operates stably, the design can optimize the structure of the hydrogen fuel power generation device, reduce the production cost, reduce the volume, reduce the weight, and improve the compatibility.

[0019] According to some embodiments of the present application, the hydrogen fuel power generation device further comprises a charge-discharge module, an energy storage module and an inverter module, the charge-discharge module is connected with the stack module, the energy storage module and the inverter module respectively, and the control module is connected with the charge-discharge module; the control method further comprises: obtaining an output voltage of the stack module, an energy storage voltage of the energy storage module and a load output voltage of the inverter module; in a starting stage, the energy storage module outputs power for the first transmission module, the second transmission module and the control module to start the stack module, and the inverter module is controlled not to output until the fuel output voltage reaches the load output voltage, the energy storage module output is reduced, and the inverter module is controlled to output; in a low-power stage or when the fuel output voltage is higher than the load output voltage and the fuel output voltage is higher than the energy storage voltage, the stack module output is controlled to supply the output of the inverter module and the stack module output is controlled to charge the energy storage module; in a high-power stage or when the fuel output voltage is lower than the load output voltage, the stack module output and the energy storage module discharge are controlled to supply the output of the inverter module.

[0020] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0022] Figure 1 Structure diagram of one embodiment of the hydrogen fuel power generation device of the present application;

[0023] Figure 2 Structure diagram of one embodiment of the hydrogen fuel power generation device of the present application;

[0024] Figure 3 Flow chart of one embodiment of the control method of the present application.

[0025] Reference Signs:

[0026] Stack module 100, membrane electrode assembly 110, first chamber 120, first gas inlet 121, first gas outlet 122, first catalytic assembly 123, second chamber 130, second gas inlet 131, second gas outlet 132, second catalytic assembly 133, first transmission module 200, first gas supply pipe group 210, first constant pressure valve 211, recovery pipe group 220, one-way valve 221, booster pump 222, proportional valve 223, second transmission module 300, second gas supply pipe group 310, air blower 311, second constant pressure valve 312, exhaust pipe group 320, third constant pressure valve 321, control module 400, humidity detection module 500, temperature detection module 600, charge and discharge module 700, energy storage module 800, inverter module 900. DETAILED DESCRIPTION

[0027] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components or components having the same or similar functions are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended only to explain the present application, and cannot be understood as limiting the present application.

[0028] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] In the description of the present application, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If it is described as first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of indicated technical features.

[0030] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] AsFigure 1 、 2 As shown in FIG. 1, a hydrogen fuel power generation device according to the first aspect of the present application comprises a stack module 100, a first transmission module 200, a second transmission module 300, a humidity detection module 500 and a control module 400. The stack module 100 is provided with a cavity. The stack module 100 is provided with a membrane electrode assembly 110 in the cavity. The membrane electrode assembly 110 divides the cavity into a first chamber 120 and a second chamber 130. The stack module 100 is provided with a first gas inlet 121 communicating with the first chamber 120 and a second gas inlet 131 communicating with the second chamber 130. The first transmission module 200 is connected to the first gas inlet 121 for inputting hydrogen into the first chamber 120. The second transmission module 300 is connected to the second gas inlet 131 for inputting oxygen or air into the second chamber 130. The humidity detection module 500 is used for detecting a humidity detection value in the first chamber 120. The control module 400 is electrically connected to the humidity detection module 500. The control module 400 is electrically connected to at least one of the first transmission module 200 and the second transmission module 300 to control the pressure difference on both sides of the membrane electrode assembly 110 by controlling the operation of at least one of the first transmission module 200 and the second transmission module 300, so that the humidity detection value is in a humidity preset range.

[0032] It should be noted that the stack module 100 is also provided with a first gas outlet 122 communicating with the first chamber 120. The stack module 100 is provided with a first catalytic assembly 123 in the first chamber 120. The first catalytic assembly 123 is located between the first gas inlet 121 and the first gas outlet 122. The stack module 100 is also provided with a second gas outlet 132 communicating with the second chamber 130. The stack module 100 is provided with a second catalytic assembly 133 in the second chamber 130. The second catalytic assembly 133 is located between the second gas inlet 131 and the second gas outlet 132. Specifically, the first catalytic assembly 123 and the second catalytic assembly 133 can be selected from conventional materials according to actual needs. The first catalytic assembly 123 is used for catalyzing hydrogen, and the second catalytic assembly 133 is used for catalyzing oxygen.

[0033] The pressure difference between the hydrogen side of the first chamber 120 and the oxygen side of the second chamber 130 on both sides of the membrane electrode assembly 110 can be controlled at 0.01-0.05 MPa. Specifically, the pressure difference can be adjusted according to the start-up stage, the low-power stage or the high-power stage of the hydrogen fuel power generation device. For example, the pressure difference is adjusted to 0.01 MPa at the start-up stage. The pressure difference is adjusted to 0.05 MPa at the high-power (full load) stage. The pressure difference is adjusted to between 0.01-0.05 MPa at the low-power stage or the non-full load stage.

[0034] The humidity preset range can be set according to the specific membrane electrode assembly 110, so as to adjust the permeation amount of water in the membrane electrode assembly 110.

[0035] The control module 400 can be composed of a CPU or an MCU processing chip and an auxiliary circuit.

[0036] The hydrogen fuel power generation device is based on the reaction characteristics of the stack module 100 of the hydrogen fuel power generation device. The gas pressure on the hydrogen side of the two sides of the membrane electrode assembly 110 needs to be higher than that on the oxygen side. Only in this way, hydrogen ions can pass through the membrane electrode assembly 110 to the oxygen side to react with oxygen, so that the stack module 100 generates electricity. However, the reaction of hydrogen ions and oxygen will generate water. Therefore, water needs to be added to the respective cavities on both sides. The excess water is carried out of the respective cavities by the higher gas flow on both sides. The control module 400 controls at least one of the first transmission module 200 and the second transmission module 300 to adjust the gas pressure difference on both sides of the membrane electrode assembly 110. On the basis of satisfying the condition that the gas pressure on the hydrogen side is higher than that on the oxygen side, the gas pressure difference on both sides of the membrane electrode assembly 110 is reduced. In this way, water can slightly penetrate from the oxygen side of the membrane electrode assembly 110 to the hydrogen side. At this time, when hydrogen gas flows through one side of the membrane electrode assembly 110, it reaches an appropriate degree of wetness. The generated protons can smoothly pass through the membrane electrode assembly 110. In addition, the humidity detection module 500 detects the humidity of the first cavity 120. When the humidity is too high, the gas pressure difference on both sides of the membrane electrode assembly 110 is increased to prevent the humidity of the hydrogen gas from being too high. It should be noted that since water only slightly penetrates from the oxygen side of the membrane electrode assembly 110 to the hydrogen side, it only serves to wet the surface of the membrane electrode assembly. Therefore, it will not cause the hydrogen gas discharged from the second gas outlet 132 to carry a large amount of water vapor. At the same time, the hydrogen fuel power generation device can be adjusted when the humidity is too low, so that the hydrogen fuel power generation device can stably operate. The design optimizes the structure, reduces the production cost, reduces the volume, reduces the weight, and improves the compatibility.

[0037] In some embodiments of the present application, as shown in Figure 1 The first transmission module 200 includes a first gas supply pipe group 210 and a recovery pipe group 220. One end of the first gas supply pipe group 210 is used to be connected with a gas source. One end of the recovery pipe group 220 is connected in communication with the first gas outlet 122. The other end of the recovery pipe group 220 is connected in communication with the other end of the first gas supply pipe group 210 and the first gas inlet 121, respectively.

[0038] The gas supply source can provide hydrogen to the first chamber 120 through the first gas supply pipe group 210. Due to the barrier with the first catalytic assembly 123 in the first chamber 120, the hydrogen enters the first chamber 120 from the first gas inlet 121, passes through the first catalytic assembly 123, and reacts with oxygen through the hydrogen ions of the first catalytic assembly 123. At this time, the hydrogen consumption is added to the gas resistance of the first chamber 120, so the gas pressure at the first gas outlet 122 is lower than that at the first gas inlet 121. During the reaction process, the hydrogen in the first chamber 120 needs to be in a flowing state, so the first gas outlet 122 needs to discharge hydrogen. In order to save resources, the recycling pipe group 220 can recycle the discharged hydrogen to the first gas inlet 121.

[0039] In some embodiments of the present application, the first gas supply pipe group 210 includes a first constant pressure valve 211. One end of the first constant pressure valve 211 is connected to the gas supply source through a pipeline. The other end of the first constant pressure valve 211 is connected to the other end of the first gas supply pipe group 210 and the first gas inlet 121 through a pipeline, respectively. The control module 400 is connected to the first constant pressure valve 211.

[0040] The gas supply source supplies gas to the first chamber 120 through the first constant pressure valve 211. The first gas pressure threshold of the first chamber 120 can be set through the first constant pressure valve 211. When the gas pressure of the first chamber 120 is higher than the first gas pressure threshold, the gas supply flow of the first constant pressure valve 211 is correspondingly reduced. When the gas pressure of the first chamber 120 is lower than the first gas pressure threshold, the gas supply flow of the first constant pressure valve 211 is correspondingly increased, thereby effectively stabilizing the gas pressure of the first chamber 120, and facilitating the control module 400 to adjust the gas pressure difference between the two sides of the membrane electrode assembly 110. Specifically, the first constant pressure valve 211 can be a balance valve.

[0041] In some embodiments of the present application, as shown in Figure 1 The recycling pipe group 220 includes a one-way valve 221, a booster pump 222, and a proportional valve 223, which are connected by pipelines to form at least part of the recycling pipeline. One end of the recycling pipeline is connected to the first gas outlet 122, and the other end of the recycling pipeline is connected to the other end of the first gas supply pipe group 210 and the first gas inlet 121, respectively.

[0042] Since the gas pressure at the first gas inlet 121 is higher than that at the first gas outlet 122, the one-way valve 221 is provided to prevent the backflow of hydrogen and affect the flow direction of hydrogen in the first chamber 120. The booster pump 222 can apply pressure to make the hydrogen at the low pressure side of the first gas outlet 122 flow to the first gas inlet 121.

[0043] And due to the output power of the hydrogen fuel power generation device is different, the consumption of hydrogen also changes accordingly, the booster pump 222 can keep the operating power unchanged, the control module 400 controls the proportional valve 223 to adjust the size of the passage, thereby adjusting the hydrogen return flow, for example, when the reaction process, hydrogen consumption is large, the proportional valve 223 can reduce the on-off rate of the passage, so as to keep the air pressure of the first chamber 120 stable.

[0044] In some embodiments of the present application, as shown in Figure 1 The second transmission module 300 includes a second air supply pipe group 310 and an exhaust pipe group 320, the second air supply pipe group 310 is connected to the second air inlet 131, and the exhaust pipe group 320 is connected to the second air outlet 132.

[0045] The second air supply pipe group 310 can be connected to the external environment to provide air for the second chamber 130, and the exhaust pipe group 320 is also connected to the external environment to keep the air in the second chamber 130 flowing continuously, which can carry the moisture and heat generated by the reaction to the outside, so as to heat the hydrogen fuel power generation device in time and make the power generation process stable.

[0046] In some embodiments of the present application, as shown in Figure 1 The second air supply pipe includes a blower 311 and a second constant pressure valve 312, one end of the second constant pressure valve 312 is connected to the blower 311 through a pipe, the other end of the second constant pressure valve 312 is connected to the second air inlet 131 through a pipe, the exhaust pipe group 320 includes a third constant pressure valve 321, one end of the third constant pressure valve 321 is connected to the second air outlet 132 through a pipe, and the control module 400 is connected to the second constant pressure valve 312 and the third constant pressure valve 321.

[0047] The blower 311 can be provided with a filter screen or filter material to filter out dust, harmful gas and oil.

[0048] The control module 400 can set a second air valve threshold for the second constant pressure valve 312 and the third constant pressure valve 321, when the air pressure of the second chamber 130 is higher than the second air pressure threshold, the air supply flow of the second constant pressure valve 312 is reduced or the exhaust flow of the third constant pressure valve 321 is increased, when the air pressure of the second chamber 130 is lower than the second air pressure threshold, the air supply flow of the second constant pressure valve 312 is increased or the exhaust flow of the third constant pressure valve 321 is reduced, so as to effectively stabilize the air pressure of the second chamber 130.

[0049] In some embodiments of the present application, the temperature detection module 600 is arranged in the first chamber 120, and the temperature detection module 600 is connected to the control module 400.

[0050] The temperature threshold can be set here. When the temperature detection module 600 detects that the temperature of the first chamber 120 is too high, the air blower 311, the first constant pressure valve 211, the second constant pressure valve 312 and the third constant pressure valve 321 can be controlled by the control module 400 accordingly, so as to speed up the air flow in the second chamber 130 and speed up heat dissipation. At the same time, the pressure difference on both sides of the membrane electrode assembly 110 is also taken into account. Specifically, the working temperature of the hydrogen fuel power generation device is generally 65-75℃.

[0051] In some embodiments of the application, a charge and discharge module 700, an energy storage module 800 and an inverter module 900 are further included. The charge and discharge module 700 is connected with the stack module 100, the energy storage module 800 and the inverter module 900 respectively. The control module 400 is connected with the charge and discharge module 700.

[0052] The charge and discharge module 700 can be selected in a conventional charge and discharge circuit. The energy storage module 800 can be a storage battery, etc. The inverter module 900 can be a conventional direct-current-to-alternating-current inverter. Through control of the charge and discharge module 700, the output of the membrane electrode assembly 110 can be inverted into power supply for a load after output to the inverter module 900, or the electrical energy can be stored in the energy storage module 800. The energy storage module 800 can also provide a starting voltage for the membrane electrode assembly 110 through the charge and discharge circuit. The energy storage module 800 can also be inverted into power supply for a load after output to the inverter module 900 through the charge and discharge circuit.

[0053] According to the control method of the second aspect of the application, the control method is applied to the hydrogen fuel power generation device disclosed in any of the above embodiments. As shown in the figure, the control method comprises: Figure 3 As shown in the figure, the control method comprises:

[0054] S100, controlling at least one of the first transmission module and the second transmission module to operate, so that the air pressure of the first chamber is higher than that of the second chamber;

[0055] S200, obtaining a humidity detection value;

[0056] S300, when the humidity detection value is higher than the humidity preset range, controlling at least one of the first transmission module and the second transmission module to operate, so that the air pressure difference between the first chamber and the second chamber increases;

[0057] S400, when the humidity detection value is lower than the humidity preset range, controlling at least one of the first transmission module and the second transmission module to operate, so that the air pressure difference between the first chamber and the second chamber decreases.

[0058] The control method of the application adjusts the air pressure difference on both sides of the membrane electrode assembly by controlling at least one of the first transmission module and the second transmission module, reduces the air pressure values on both sides of the membrane electrode assembly on the basis of satisfying the low hydrogen and oxygen flow and the air pressure on the hydrogen side being slightly higher than the air pressure on the oxygen side, so that water can penetrate from the oxygen side of the membrane electrode assembly to the hydrogen side, at this time, the hydrogen flows through the membrane electrode assembly and combines with the penetrated water to reach the reaction condition of humidity, in addition, the humidity of the first chamber is detected by the humidity detection module, when the humidity is too high, the air pressure difference on both sides of the membrane electrode assembly is increased to prevent the humidity of hydrogen from being too high, and the hydrogen fuel power generation device can also be adjusted when the humidity is too low to ensure stable operation, the design can optimize the structure of the hydrogen fuel power generation device, reduce the production cost, reduce the volume and weight, and improve the compatibility.

[0059] In some embodiments of the application, the hydrogen fuel power generation device further comprises a charge and discharge module, an energy storage module and an inverter module, the charge and discharge module is connected with the stack module, the energy storage module and the inverter module respectively, and the control module is connected with the charge and discharge module; the control method further comprises: obtaining the output voltage Ufc of the stack module, the energy storage voltage Ub of the energy storage module and the load output voltage Ul of the inverter module; in the starting stage, the energy storage module outputs power for the first transmission module, the second transmission module and the control module to start the stack module, and the inverter module does not output, until the fuel output voltage Ufc reaches the load output voltage Ul, the output of the energy storage module is reduced, and the inverter module outputs; in the low power stage or when the fuel output voltage Ufc is higher than the load output voltage Ul and the fuel output voltage Ufc is higher than the energy storage voltage Ub, the stack module outputs to supply the output of the inverter module and controls the stack module to output to charge the energy storage module; in the high power stage or when the fuel output voltage Ufc is lower than the load output voltage Ul, the stack module outputs and the energy storage module discharges to supply the output of the inverter module, wherein the hydrogen fuel power generation device provides output with constant current load, if the energy storage module is within the rated output range, the energy storage voltage Ub is greater than or equal to the load output voltage Ul, and the output of the energy storage module stabilizes the load output voltage, the design reasonably allocates the output of the stack module and the output of the energy storage module to ensure stable operation of the hydrogen fuel power generation device and stable output of power supply for the load.

[0060] The technical features of the above-mentioned embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0061] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely divergences of the principles and application of the present application and that numerous modifications, changes, substitutions, and alterations can be made thereto without departing from the spirit and scope of the present application, which is defined by the following claims and their equivalents.

Claims

1. A hydrogen fuel cell power generation device, characterized in that, include: A fuel cell stack module has a cavity inside. A membrane electrode assembly is disposed in the cavity. The membrane electrode assembly divides the cavity into a first chamber and a second chamber. The fuel cell stack module is provided with a first air inlet communicating with the first chamber and a second air inlet communicating with the second chamber. A first transmission module is connected to the first air inlet to supply hydrogen to the first chamber; The second transmission module is connected to the second air inlet to supply oxygen or air to the second chamber. A humidity detection module is used to detect the humidity value inside the first chamber; A control module is electrically connected to the humidity detection module. The control module is also electrically connected to at least one of the first transmission module and the second transmission module to control the air pressure difference across the membrane electrode assembly by controlling the operation of at least one of the first transmission module and the second transmission module, so that the humidity detection value is within a preset humidity range. The fuel cell stack module is further provided with a first gas outlet communicating with the first chamber. The fuel cell stack module is provided with a first catalytic component in the first chamber. The first catalytic component is located between the first gas inlet and the first gas outlet. The first transmission module includes a first gas supply pipe group and a recovery pipe group. One end of the first gas supply pipe group is used to connect to a gas supply source. One end of the recovery pipe group is connected to the first gas outlet. The other end of the recovery pipe group is connected to the other end of the first gas supply pipe group and the first gas inlet, respectively. The first gas supply pipe assembly includes a first constant pressure valve. One end of the first constant pressure valve is connected to the gas supply source via a pipe, and the other end of the first constant pressure valve is connected to the other end of the first gas supply pipe assembly and the first air inlet via pipes. The control module is connected to the first constant pressure valve. The fuel cell stack module is also provided with a second air outlet communicating with the second chamber. The fuel cell stack module is provided with a second catalytic component in the second chamber. The second catalytic component is located between the second air inlet and the second air outlet. The second transmission module includes a second air supply pipe group and an exhaust pipe group. The second air supply pipe group is connected to the second air inlet, and the exhaust pipe group is connected to the second air outlet. The second air supply pipe assembly includes a blower and a second constant pressure valve. One end of the second constant pressure valve is connected to the blower through a pipe, and the other end of the second constant pressure valve is connected to the second air inlet through a pipe. The exhaust pipe assembly includes a third constant pressure valve. One end of the third constant pressure valve is connected to the second air outlet through a pipe. The control module is connected to the second constant pressure valve and the third constant pressure valve respectively. The fuel cell module is equipped with a temperature detection module in the first chamber, and the temperature detection module is connected to the control module. When the temperature detection module detects that the temperature in the first chamber is too high, the control module controls the blower, the first constant pressure valve, the second constant pressure valve and the third constant pressure valve to increase the air flow in the second chamber.

2. A hydrogen fuel cell power generation device according to claim 1, characterized in that: The recovery pipeline includes a one-way valve, a booster pump, and a proportional valve. The one-way valve, the booster pump, and the proportional valve are connected by a pipeline to form at least a partial recovery pipeline. One end of the recovery pipeline is connected to the first air outlet, and the other end of the recovery pipeline is connected to the other end of the first air supply pipeline and the first air inlet, respectively.

3. A hydrogen fuel cell power generation device according to claim 1, characterized in that, It also includes a charging and discharging module, an energy storage module, and an inverter module. The charging and discharging module is connected to the fuel cell stack module, the energy storage module, and the inverter module, respectively. The control module is connected to the charging and discharging module.

4. A control method, characterized in that, The control method, applied to any one of the hydrogen fuel cell power generation devices as described in claims 1 to 3, comprises: Control the operation of at least one of the first transmission module and the second transmission module such that the air pressure in the first chamber is higher than the air pressure in the second chamber; Obtain the humidity detection value; When the humidity detection value is higher than the preset humidity range, at least one of the first transmission module and the second transmission module is controlled to operate, so as to increase the air pressure difference between the first chamber and the second chamber. When the humidity detection value is lower than the preset humidity range, at least one of the first transmission module and the second transmission module is controlled to operate, so as to reduce the air pressure difference between the first chamber and the second chamber.

5. The control method according to claim 4, characterized in that, The hydrogen fuel power generation device further includes a charging and discharging module, an energy storage module, and an inverter module. The charging and discharging module is connected to the fuel cell stack module, the energy storage module, and the inverter module, respectively. The control module is connected to the charging and discharging module. The control method further includes: The output voltage of the fuel cell stack module, the energy storage voltage of the energy storage module, and the load output voltage of the inverter module are obtained. During the startup phase, the energy storage module outputs power to the first transmission module, the second transmission module, and the control module to start the fuel cell stack module, and controls the inverter module to not output until the fuel output voltage reaches the load output voltage, at which point the energy storage module output is reduced, and the inverter module output is controlled. During low-power phases or when the fuel output voltage is higher than the load output voltage and the fuel output voltage is higher than the energy storage voltage, the fuel cell module output is controlled to supply the output of the inverter module and the fuel cell module output is controlled to charge the energy storage module. During high-power phases or when the fuel output voltage is lower than the load output voltage, the stack module output and the energy storage module discharge to supply the output of the inverter module.

Images