A fuel cell unit and a fuel cell power plant

Abstract

The application discloses a fuel cell unit and a fuel cell power generation device. A thin sheet-shaped reaction module of the fuel cell unit can directly supply power to the control system, so that the fuel cell unit can be started without setting a backup power supply or in the case that the voltage of the set backup power supply is too low. Meanwhile, a plurality of fuel cell units can be cascaded to form the fuel cell power generation device, so as to improve the output power and output voltage of the fuel cell power generation device.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more specifically to a fuel cell unit and a fuel cell power generation device. Background Technology

[0002] In existing technologies, fuel cells are started using active power. Fuel cells are typically equipped with a backup power source to power the fuel cell control system, ensuring normal startup. Existing fuel cell stacks are usually composed of a large number of stacked, thin-film fuel cell modules, forming a cylindrical stack. Each thin-film fuel cell module in the stack has its two sides tightly pressed together, preventing natural air intake. Therefore, the stack has numerous gas inlets on its sides for introducing cooling air, reaction air, and hydrogen. These reaction and cooling gases must be forced into these small-diameter inlets by a high-power compressor. Thus, existing fuel cell stacks require an auxiliary power source to drive the compressor for startup. These auxiliary power sources, the bulky and power-consuming compressors, and the gas flow structure result in a large fuel cell stack size and weight, limiting its application to heavy equipment such as vehicles and preventing its use in aviation or personal portable devices. Furthermore, the high energy consumption of the compressor limits the energy conversion efficiency of the fuel cell stack. Furthermore, the electrical and gas management connections of each fuel cell module in this type of fuel cell stack are designed based on the structure and size of the entire cylindrical fuel cell stack. After manufacturing, it is difficult to add or remove some fuel cell modules. Fuel cell stacks with different sizes and connection methods must be redesigned. Therefore, the cost of redesigning and testing existing fuel cells for different applications is very high, and they lack design flexibility.

[0003] Therefore, the industry needs to develop a new type of fuel cell power generation device that can start automatically without auxiliary power, and is small in size and weight to be suitable for mobile applications where the total power requirement is not high. Summary of the Invention

[0004] To address or partially address the problems existing in related technologies, this invention provides a fuel cell unit and a fuel cell power generation device. The thin-film reactor module of the fuel cell unit can directly power the control system, enabling the fuel cell unit to start up without a backup power supply or with a backup power supply having an excessively low voltage. Simultaneously, several fuel cell units can be cascaded to form a fuel cell power generation device, thereby increasing its output power and output voltage.

[0005] This invention provides a fuel cell unit comprising:

[0006] A sheet-shaped reaction module includes an air contact surface; a plurality of gas through holes are distributed on the first surface of the air contact surface, and a fuel gas diffusion cavity is provided on the second surface of the air contact surface;

[0007] The control system is used to ensure the stable operation of the fuel cell unit and to manage the output electrical power generated by the fuel cell unit.

[0008] The sheet-shaped reaction module supplies power to the control system;

[0009] The fuel cell unit also includes an air inlet and an air outlet for allowing fuel gas to flow into and out of the fuel cell unit. The air inlet and air outlet are matched with each other so that the fuel outlet can be combined with the air inlet of an adjacent fuel cell unit to form an interconnected fuel gas channel.

[0010] The control system further includes a current input interface and a current output interface, wherein the current input interface and the current output interface are matched to each other, so that the current input / output interface can be electrically connected to the current output / input interface of an adjacent fuel cell unit.

[0011] Optionally, the fuel cell unit further includes:

[0012] The first one-way valve is installed on the pipeline near the air inlet to allow fuel gas to flow downstream to the sheet-shaped reaction module.

[0013] Optionally, the fuel cell unit further includes:

[0014] A second one-way valve is installed on the pipeline near the gas outlet to allow fuel gas to flow from the sheet-shaped reaction module to the gas outlet.

[0015] Optionally, the fuel cell unit further includes:

[0016] A solenoid valve is installed on the pipeline near the gas outlet and connected between the sheet-shaped reaction module and the gas outlet. The control system is electrically connected to the solenoid valve to control the opening and closing of the solenoid valve.

[0017] Optionally, the control system includes:

[0018] Controller; and

[0019] The power conversion module, which is electrically connected to the controller, is used to convert the electrical power output by the fuel cell, which has a first voltage and a first current, into output electrical power with a second voltage and a second current, and output it from the current input interface and the current output interface.

[0020] Optionally, the control system further includes:

[0021] A pressure detection module electrically connected to the controller is used to detect fuel gas pressure;

[0022] When the fuel pressure detected by the pressure detection module is lower than the set pressure, the controller cuts off the output and shuts down the machine in an orderly manner.

[0023] Optionally, the control system further includes:

[0024] An input voltage detection module electrically connected to the controller is used to detect the input voltage of the fuel cell;

[0025] An output voltage detection module electrically connected to the controller is used to detect the output voltage of the fuel cell;

[0026] A current detection module electrically connected to the controller is used to detect the load current; and / or

[0027] A temperature detection module electrically connected to the controller is used to detect the temperature of the fuel cell;

[0028] The output is controlled by detecting the input voltage of the fuel cell, the output voltage of the fuel cell, the load current and / or the temperature of the fuel cell, thereby ensuring that the fuel cell operates in an orderly and stable manner.

[0029] Optionally, the solenoid valve is a normally open solenoid valve; when the fuel cell supplies power to the control system and the control system is started, the controller controls the opening or closing of the solenoid valve.

[0030] Optionally, when the control system detects that the current input interface is not connected to the current output interface of an adjacent fuel cell unit, it controls the solenoid valve to close.

[0031] Optionally, the fuel cell is a flat-plate fuel cell.

[0032] Optionally, the fuel cell unit further includes a parallel inlet and a parallel outlet for allowing fuel gas to flow into and out of the fuel cell unit. The parallel inlet and the parallel outlet are matched to each other, such that the parallel outlet of the fuel cell unit is connected to the parallel inlet of the adjacent fuel cell unit to form a second interconnected fuel gas channel.

[0033] On the other hand, the present invention also provides a fuel cell power generation device, which includes:

[0034] Multiple fuel cell units, each fuel cell unit including an air inlet and a gas outlet for allowing fuel gas to flow into and out of the fuel cell unit, the air inlet and outlet being matched to each other so that the fuel gas outlet can be combined with the air inlet of an adjacent fuel cell unit to form a series fuel gas channel.

[0035] The control system includes a current input interface and a current output interface, wherein the current input interface and the current output interface are matched with each other, so that the current input / output interface can be electrically connected to the current output / input interface of an adjacent fuel cell unit.

[0036] The air inlet of each fuel cell unit is connected to the air outlet of the adjacent fuel cell unit or a fuel gas source, so that the fuel gas in the fuel gas source flows through multiple fuel cell units in sequence.

[0037] Each fuel cell unit's current input / output interface is connected to the current input / output interface of an adjacent fuel cell unit, or connected to a load circuit outside the fuel cell power generation device, so that multiple fuel cell units are electrically connected to each other to form an interconnected circuit, supplying power to the load circuit.

[0038] Optionally, each fuel cell unit is further provided with a one-way valve at its air inlet and air outlet, so that high-pressure gas from the fuel gas source flows into or through the fuel cell unit through the one-way valve, while preventing air from flowing into the fuel cell unit through the two one-way valves.

[0039] Optionally, each fuel cell unit includes a thin-film reaction module for reacting fuel gas flowing into the reaction module with external air to form a first electrical power, and also includes a control system that controls the operation of the fuel cell unit after receiving the first electrical power.

[0040] Optionally, each fuel cell unit's outlet also includes a solenoid valve, which the control system closes when it detects that the fuel cell unit's current input / output interface is not electrically connected to an adjacent fuel cell unit.

[0041] Optionally, the fuel gas source is a hydrogen cylinder or a hydrogen generator.

[0042] The technical solution provided by this invention may include the following beneficial effects:

[0043] The present invention provides a fuel cell unit in which the thin-film reactor module can directly power the control system of the fuel cell unit, enabling the fuel cell unit to start up without a backup power supply or with a backup power supply voltage that is too low.

[0044] The present invention also provides a fuel cell power generation device, which is composed of a number of fuel cell units cascaded together, thereby improving the output power and output voltage of the fuel cell power generation device.

[0045] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of this invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the structure of a fuel cell unit in one embodiment of the present invention;

[0048] Figure 2 This is a schematic diagram of the structure of a fuel cell unit in another embodiment of the present invention. Detailed Implementation

[0049] Embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be more thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0050] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0051] It should be understood that although the terms "first," "second," "third," etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] This invention provides a fuel cell unit 100 and a fuel cell power generation device. The fuel cell unit 100 includes a thin-film reactor module 101 and a control system 102. The thin-film reactor module 101 can directly supply power to the control system 102, enabling the fuel cell unit 100 to start up without a backup power supply or with a backup power supply voltage that is too low. Several fuel cell units 100 can be cascaded to form a fuel cell power generation device to improve their output power and output voltage.

[0053] The technical solutions of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0054] Please see Figure 1 This invention provides a fuel cell unit 100, which generally includes: a sheet-shaped reaction module 101, a control system 102, an air inlet 103, an air outlet 104, a current input interface 105, and a current output interface 106. The sheet-shaped reaction module 101 is used to convert the chemical energy present in the fuel and oxidant into electrical energy and directly power the control system 102, so as to ensure that the fuel cell unit 100 can start up without a backup power supply or when the voltage of the backup power supply is too low.

[0055] The specific structure of the sheet-shaped reaction module 101 in this invention can be found in patent CN214336753U filed by the same applicant. Specifically, the sheet-shaped reaction module 101 includes an air contact surface, a plurality of gas through holes are distributed on the first surface of the air contact surface, and a fuel gas diffusion cavity is provided on the second surface of the air contact surface. The control system 102 is used to ensure the stable operation of the fuel cell and manage the output power generated by the fuel cell unit 100. The air inlet 103 and the air outlet 104 are provided on the sheet-shaped reaction module 101 to allow fuel gas to flow into and out of the fuel cell unit 100. The air inlet 103 and the air outlet 104 are matched with each other so that the fuel gas outlet 104 can be combined with the air inlet 103 of the adjacent fuel cell unit 100 to form an interconnected fuel gas channel. The current input interface 105 and the current output interface 106 are matched with each other so that the current input / output interface can be electrically connected to the current output / input interface of the adjacent fuel cell unit 100.

[0056] In this embodiment, the fuel cell unit 100 further includes a first one-way valve 107. The first one-way valve 107 is disposed on a pipeline near the air inlet 103 for receiving fuel gas and allowing the fuel gas to flow downstream to the sheet-shaped reaction module 101.

[0057] Specifically, the first one-way valve 107 only allows external fuel gas to enter the fuel gas diffusion chamber through the inlet 103, and does not allow gas in the fuel gas diffusion chamber to flow back into the inlet 103. Specifically, when the gas pressure at the inlet of the first one-way valve 107 is greater than the gas pressure in the fuel gas diffusion chamber, the first one-way valve 107 automatically opens, allowing external fuel gas to enter the fuel gas diffusion chamber through the inlet 103; when the gas pressure at the inlet of the first one-way valve 107 is less than or equal to the gas pressure in the fuel gas diffusion chamber, the first one-way valve 107 automatically closes, preventing gas in the fuel gas diffusion chamber from flowing out through the inlet 103.

[0058] In this embodiment, the fuel cell unit 100 further includes a second one-way valve 108. The second one-way valve 108 is disposed on a pipeline near the outlet 104 and is used to allow fuel gas in the sheet-shaped reaction module 101 to flow out through the pipeline of the outlet 104.

[0059] Specifically, the second one-way valve 108 only allows gas in the fuel gas diffusion chamber to flow out through the outlet 104, while preventing external gas from flowing into the fuel gas diffusion chamber through the outlet 104. Specifically, when the gas pressure in the fuel gas diffusion chamber is greater than the gas pressure at the outlet of the second one-way valve 108, the second one-way valve 108 automatically opens, allowing gas in the fuel gas diffusion chamber to flow out through the outlet 104; when the gas pressure in the fuel gas diffusion chamber is less than or equal to the gas pressure at the outlet of the second one-way valve 108, the second one-way valve 108 automatically closes, preventing external gas from entering the fuel gas diffusion chamber through the outlet 104.

[0060] It should be noted that during the initial startup of the fuel cell unit 100, the gas inside the fuel cell unit 100 flows out sequentially through the pipeline of the air inlet 103, the fuel gas diffusion chamber, and the pipeline of the air outlet 104. However, during the stable operation phase, the fuel cell unit 100 continuously produces water (reaction product). The water produced during this phase is directly exposed to the air through the air contact surface and does not need to flow out through the aforementioned gas passage.

[0061] In this embodiment, the fuel cell unit 100 further includes a solenoid valve 109. Preferably, the solenoid valve 109 is a normally open solenoid valve.

[0062] The solenoid valve 109 is installed on the pipeline near the outlet 104, located between the sheet-shaped reaction module 101 and the outlet 104. The solenoid valve 109 installed on the fuel cell unit 100 is used to ensure that the pipeline of the outlet 104 of the fuel cell unit 100 used alone or the pipeline of the rightmost outlet 104 of several fuel cell units 100 used in cascade can be closed normally.

[0063] The control system 102 is electrically connected to the solenoid valve 109 to control the opening and closing of the solenoid valve 109. The sheet-shaped reaction module 101 supplies power to the control system 102, which then starts and controls the opening or closing of the solenoid valve 109.

[0064] In this embodiment, if a single fuel cell unit 100 is used, the control system controls the solenoid valve 109 of that fuel cell unit 100 to close; if several cascaded fuel cell units 100 are used, the control system of the rightmost fuel cell unit 100 controls the rightmost solenoid valve 109 to close. This embodiment prevents external gas from flowing back into the fuel cell unit 100 through the aforementioned control method of the solenoid valve 109.

[0065] Specifically, when the control system 102 detects that the current input interface 105 is not connected to the current output interface 106 of the adjacent fuel cell unit 100, it controls the solenoid valve 109 to close.

[0066] In this embodiment, the control system 102 includes a controller and a power conversion module. The power conversion module is electrically connected to the controller and is used to convert the electrical power output by the fuel cell, which has a first voltage and a first current, into output electrical power with a second voltage and a second current, and output it from the current input interface 105 and the current output interface 106.

[0067] In this embodiment, the control system 102 further includes a pressure detection module. The pressure detection module is electrically connected to the controller and is used to detect fuel gas pressure; when the fuel pressure detected by the pressure detection module is less than a set pressure, the controller cuts off the output and shuts down in an orderly manner.

[0068] In this embodiment, the control system 102 further includes: an input voltage detection module, an output voltage detection module, a current detection module, and a temperature detection module. The input voltage detection module is electrically connected to the controller and is used to detect the input voltage of the fuel cell; the output voltage detection module is electrically connected to the controller and is used to detect the output voltage of the fuel cell; the current detection module is electrically connected to the controller and is used to detect the load current; the temperature detection module is electrically connected to the controller and is used to detect the temperature of the fuel cell.

[0069] The controller can control the output based on the detected input voltage of the fuel cell, the output voltage of the fuel cell, the load current and / or the temperature of the fuel cell, thereby ensuring that the fuel cell operates in an orderly and stable manner.

[0070] In this embodiment, the fuel cell is a flat-panel fuel cell.

[0071] It should be noted that the term "flat plate" in this embodiment is only a definition of shape, and does not impose any specific definition on its size (such as thickness, length, and width).

[0072] In this embodiment, the fuel cell unit 100 further includes a backup power supply. The backup power supply supplies power to the control system 102 when the fuel supply is less than a preset supply amount, wherein the preset supply amount is a variable and can be set by those skilled in the art according to actual working conditions.

[0073] Please see Figure 2 In other embodiments, the fuel cell unit 200 is essentially the same as the fuel cell unit 100 in the above embodiments, except that the fuel cell unit 200 further includes a parallel inlet 203 and a parallel outlet 205. The parallel inlet 203 and the parallel outlet 205 are used to allow fuel gas to flow into and out of the fuel cell unit 200. The parallel inlet 203 and the parallel outlet 205 are matched to each other, such that the parallel outlet 205 of the fuel cell unit 200 is connected to the parallel inlet 203 of the adjacent fuel cell unit 200, forming an interconnected second fuel gas channel.

[0074] In this embodiment, the fuel cell unit 200 further includes a parallel solenoid valve 206. The parallel solenoid valve 206 is a normally closed solenoid valve. When the fuel cell unit 200 generates current and causes the control system 202 to operate, the control system 202 detects whether the parallel outlet of the current fuel cell unit 200 is connected to the parallel outlet of an adjacent fuel cell unit 200. If connected, the parallel solenoid valve 206 is opened, allowing the fuel gas in the current fuel cell unit 200 to be transported to another fuel cell unit 200 connected in parallel through the parallel outlet 205.

[0075] This embodiment adds parallel air inlets 203 and parallel air outlets 205 to the fuel cell unit 200, thereby connecting the gas paths of multiple fuel cell units 200 to form a network structure, which makes it easier to achieve optimal uniform distribution of hydrogen in multiple different fuel cell units 200.

[0076] Based on the same inventive concept, this invention also provides a fuel cell power generation device, which is composed of several fuel cell units 100 cascaded together, which can improve its output power and output voltage.

[0077] In this embodiment, the fuel cell power generation device generally includes:

[0078] Multiple fuel cell units 100, each fuel cell unit 100 includes an air inlet 103 and a gas outlet 104 for allowing fuel gas to flow into and out of the fuel cell unit 100. The air inlet 103 and the gas outlet 104 are matched with each other so that the fuel gas outlet 104 can be combined with the air inlet 103 of the adjacent fuel cell unit 100 to form a series fuel gas channel.

[0079] The control system 102 includes a current input interface 105 and a current output interface 106, wherein the current input interface 105 and the current output interface 106 are matched with each other, so that the current input / output interface can be electrically connected to the current output / input interface of the adjacent fuel cell unit 100.

[0080] Each fuel cell unit 100 has an air inlet 103 connected to an air outlet 104 of an adjacent fuel cell unit 100 or a fuel gas source, so that the fuel gas in the fuel gas source flows through multiple fuel cell units 100 in sequence.

[0081] The current input / output interface of each fuel cell unit 100 is connected to the current input / output interface of the adjacent fuel cell unit 100, or connected to a load circuit outside the fuel cell power generation device, so that multiple fuel cell units 100 are electrically connected to each other to form an interconnected circuit and supply power to the load circuit.

[0082] In this embodiment, a one-way valve is also provided at the air inlet 103 and the air outlet 104 of each fuel cell unit 100, so that high-pressure gas from the fuel gas source flows into or through the fuel cell unit 100 through the one-way valve, while preventing air from flowing into the fuel cell unit 100 through the two one-way valves.

[0083] In this embodiment, each fuel cell unit 100 includes a thin-film reaction module 101 for reacting fuel gas flowing into the reaction module with external air to form a first electrical power. It also includes a control system 102, which controls the operation of the fuel cell unit 100 after receiving the first electrical power.

[0084] In this embodiment, each fuel cell unit 100 also includes a solenoid valve 109 at its outlet. When the control system 102 detects that the current input / output interface of the fuel cell unit 100 is not electrically connected to the adjacent fuel cell unit 100, it closes the solenoid valve 109.

[0085] In this embodiment, the fuel gas source is a hydrogen cylinder or a hydrogen generator.

[0086] The above description is merely an embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and scope of the present invention are included within the scope of protection of the present invention.

Claims

1. A fuel cell unit, characterized by, Include: A sheet-shaped reaction module includes an air contact surface; a plurality of gas through holes are distributed on a first surface of the air contact surface, and a fuel gas diffusion chamber is provided on a second surface opposite to the air contact surface; water continuously generated by the fuel cell unit during stable operation is directly exposed to the air through the air contact surface. The control system is used to ensure the stable operation of the fuel cell unit and to manage the output electrical power generated by the fuel cell unit. The sheet-shaped reaction module supplies power to the control system; The fuel cell unit also includes an air inlet and an air outlet for allowing fuel gas to flow into and out of the fuel cell unit. The air inlet and air outlet are matched with each other so that the fuel outlet can be combined with the air inlet of an adjacent fuel cell unit to form an interconnected fuel gas channel. The control system further includes a current input interface and a current output interface, wherein the current input interface and the current output interface are matched to each other, so that the current input / output interface can be electrically connected to the current output / input interface of an adjacent fuel cell unit. The fuel cell unit also includes: a solenoid valve disposed on a pipeline near the outlet, connected between the sheet-shaped reaction module and the outlet, and the control system electrically connected to the solenoid valve to control the opening and closing of the solenoid valve; When the control system detects that the current input interface is not connected to the current output interface of the adjacent fuel cell unit, it controls the solenoid valve to close.

2. The fuel cell unit of claim 1, wherein The fuel cell unit also includes: The first one-way valve is installed on the pipeline near the air inlet to allow fuel gas to flow downstream to the sheet-shaped reaction module.

3. The fuel cell unit of claim 1, wherein The fuel cell unit also includes: A second one-way valve is installed on the pipeline near the gas outlet to allow fuel gas to flow from the sheet-shaped reaction module to the gas outlet.

4. The fuel cell unit according to any one of claims 1 to 3, characterized in that, The control system includes: Controller; and The power conversion module, which is electrically connected to the controller, is used to convert the electrical power output by the fuel cell, which has a first voltage and a first current, into output electrical power with a second voltage and a second current, and output it from the current input interface and the current output interface.

5. The fuel cell unit as described in claim 4, characterized in that, The control system further includes: A pressure detection module electrically connected to the controller is used to detect fuel gas pressure; When the fuel pressure detected by the pressure detection module is lower than the set pressure, the controller cuts off the output and shuts down the machine in an orderly manner.

6. The fuel cell unit as described in claim 4, characterized in that, The control system further includes: An input voltage detection module electrically connected to the controller is used to detect the input voltage of the fuel cell; An output voltage detection module electrically connected to the controller is used to detect the output voltage of the fuel cell; A current detection module electrically connected to the controller is used to detect the load current; and / or A temperature detection module electrically connected to the controller is used to detect the temperature of the fuel cell; The output is controlled by detecting the input voltage of the fuel cell, the output voltage of the fuel cell, the load current and / or the temperature of the fuel cell, thereby ensuring that the fuel cell operates in an orderly and stable manner.

7. The fuel cell unit as described in claim 4, characterized in that, When the fuel cell supplies power to the control system, and the control system is started, the controller controls the opening or closing of the solenoid valve.

8. The fuel cell unit as claimed in claim 1, characterized in that, The fuel cell is a flat-plate fuel cell.

9. The fuel cell unit as claimed in claim 1, characterized in that, The fuel cell unit also includes a parallel inlet and a parallel outlet for allowing fuel gas to flow into and out of the fuel cell unit. The parallel inlet and the parallel outlet are matched to each other, so that the parallel outlet of the fuel cell unit is connected to the parallel inlet of the adjacent fuel cell unit to form a second interconnected fuel gas channel.

10. A fuel cell power generation device, characterized in that, The fuel cell power generation device includes: Multiple fuel cell units are provided, each including an air inlet and an air outlet for fuel gas to flow into and out of the fuel cell unit. The air inlet and outlet are matched so that the fuel gas outlet can be combined with the air inlet of an adjacent fuel cell unit to form a series fuel gas channel. Each fuel cell unit includes a sheet-shaped reaction module, each reaction module including an air contact surface. A plurality of gas through holes are distributed on a first surface of the air contact surface, and a fuel gas diffusion chamber is provided on a second surface opposite to the air contact surface. Water continuously generated by the fuel cell unit during stable operation is directly exposed to the air through the air contact surface. Each fuel cell unit also includes a control system for ensuring stable operation of the fuel cell unit and managing the output power generated by the fuel cell unit. The control system includes a current input interface and a current output interface, wherein the current input interface and the current output interface are matched with each other, so that the current input / output interface can be electrically connected to the current output / input interface of an adjacent fuel cell unit. The air inlet of each fuel cell unit is connected to the air outlet of the adjacent fuel cell unit or a fuel gas source, so that the fuel gas in the fuel gas source flows through multiple fuel cell units in sequence. Each fuel cell unit's current input / output interface is connected to the current input / output interface of an adjacent fuel cell unit, or connected to a load circuit outside the fuel cell power generation device, so that multiple fuel cell units are electrically connected to form an interconnected circuit, supplying power to the load circuit. Each fuel cell unit's outlet also includes a solenoid valve, which the control system closes when it detects that the fuel cell unit's current input / output interface is not electrically connected to an adjacent fuel cell unit.

11. The fuel cell power generation device as described in claim 10, characterized in that, Each fuel cell unit is also equipped with a one-way valve at its air inlet and air outlet, allowing high-pressure gas from the fuel gas source to flow into or through the fuel cell unit via the one-way valve, while preventing air from flowing into the fuel cell unit via the two one-way valves.

12. The fuel cell power generation device as described in claim 10, characterized in that, Each fuel cell unit includes a thin-film reaction module for reacting fuel gas flowing into the reaction module with external air to generate a first electrical power. It also includes a control system that controls the operation of the fuel cell unit after receiving the first electrical power.

13. The fuel cell power generation device as described in claim 10, characterized in that, The fuel gas source is a hydrogen cylinder or a hydrogen generator.

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