KR20130099684A - Method for self-humidifying fuel cell system and fuel cell system using the same - Google Patents

Abstract

PURPOSE: A self humidifying method of a fuel cell device is provided to easily humidify a room without a humidifier; reduce the size of the fuel cell system without a separate cell for humidification; increase a fuel power density. CONSTITUTION: A self humidifying method of a fuel cell device in which more than one alkali anion exchange membrane fuel cell or a stack and more than one polymer electrolyte membrane fuel cell or the stack are arranged by turns comprises the following: a step of supplying hydrogen gas to the alkali anion exchange membrane fuel cell or the stack; a step of supplying the hydrogen gas which is emitted from the alkali anion exchange membrane fuel cell or the stack, and which is humidified with the water which is generated in the alkali anion exchange membrane fuel cell or the stack to the polymer electrolyte membrane fuel cell or the stack.

Description

Method for self-humidification of fuel cell device and fuel cell device using same {Method for self-humidifying fuel cell system and fuel cell system using the same}

The present specification relates to a self-humidifying method of a fuel cell and a fuel cell device using the same.

Currently, polymer electrolyte membrane fuel cell technology employs a hydrocarbon-based polymer or a perfluorinated polymer membrane having a sulfonic acid group.

These materials show a tendency to be divided into hydrophilic and hydrophobic regions by micro face separation. Here, the hydrophilic region forms a channel, which channel comprises water.

Polymers with sulfonic acid groups have a high proton conductivity, but only show high proton conductivity when sufficiently moistened with water. That is, since the proton conductivity depends on the water content, maintaining the humidification of the polymer membrane is very important for fuel cell performance. For example, when dry gas is supplied at an operating temperature of 60 ° C. to 80 ° C., or when the operating temperature is increased to 100 ° C. or higher to evaporate water, proton conductivity may be lowered, resulting in deterioration of cell performance.

Accordingly, polymer electrolyte membrane fuel cell and stacks based on PFSA membranes, such as Nafion, are generally operated using humidified gases.

Non-Patent Document 1 discloses a stack system for use in a robot operating in a hazardous environment. The stack system consists of seven humidifier cells and 22 polymer electrolyte membrane fuel cell cells. Although 22 active cells provide energy, the seven humidifier cells are blind cells, the purpose of which is only to move water from the outlet air stream to the fuel gas stream supplied to the stack. Is used only.

However, according to the results of the present inventors, the above technique has a problem that the humidifier cell still takes up a lot of space. That is, although the technology describes that the cell stack size is reduced, there is still a problem that the blind cells occupy space.

Non Patent Literature 1: S.Y. Lee et al., J. Fuel Cell Sci. Tech., 2010 (7), 31006-1-7.

In embodiments of the present invention, a self-humidizable fuel cell system capable of humidifying fuel or air (oxygen) without a separate humidifier device, does not require a separate blind cell to replace the humidifier, It is to provide a method and apparatus for self-humidifying a fuel cell that can be easily performed.

In embodiments of the present invention, a method of self-humidifying a fuel cell device in which one or more alkaline anion exchange membrane fuel cell (AAEMFC) cells or stacks and one or more polymer electrolyte membrane fuel cell (PEMFC) cells or stacks are alternately disposed, Supplying hydrogen gas to an alkali anion exchange membrane fuel cell or stack; And supplying hydrogen gas discharged from the alkali anion exchange membrane fuel cell or stack to the polymer electrolyte membrane fuel cell or stack, the hydrogen gas moistened by water generated in the alkali anion exchange membrane fuel cell or stack. It provides a method of self-humidifying a fuel cell device comprising a.

Embodiments of the invention also provide a self-humidifying method of a fuel cell device in which one or more alkaline anion exchange membrane fuel cell (AAEMFC) cells or stacks and one or more polymer electrolyte membrane fuel cell (PEMFC) cells or stacks are alternately disposed. Supplying air or oxygen to the polymer electrolyte membrane fuel cell or stack; And supplying air or oxygen discharged from the polymer electrolyte membrane fuel cell or stack to the alkali anion exchange membrane fuel cell or stack, wherein the air or oxygen moistened by the water generated in the polymer electrolyte membrane fuel cell or stack is supplied to the alkali anion exchange membrane fuel cell or stack. It provides a method of self-humidifying a fuel cell device comprising a.

In an exemplary embodiment of the present invention, a portion of the humidified hydrogen is supplied back to an alkali anion exchange membrane fuel cell or stack, or hydrogen gas released from the polymer electrolyte membrane fuel cell or stack is supplied to an alkali anion exchange membrane fuel cell. The air or oxygen released from the cell or stack, or a portion of the humidified air or oxygen back to the polymer electrolyte membrane fuel cell or stack, or the air or oxygen released from the alkali anion exchange membrane fuel cell or stack Feed back to the battery cell or stack.

In an exemplary embodiment of the invention, the power generated in one or more polymer electrolyte membrane fuel cell or stack or one or more alkali anion exchange membrane fuel cell or stack is used as the main power of the energy consuming device and supplies the main power. Alkali anion exchange membrane fuel cell or stack or polymer electrolyte membrane fuel cell or stack which is not used is used as an auxiliary power to the main power instead of the charging power of the secondary battery or the secondary battery.

In an exemplary embodiment of the invention, the method measures the humidity of humidified hydrogen gas and / or humidified air or oxygen and corresponds to the measurement an alkali anion exchange membrane fuel cell or stack and / or polymer electrolyte membrane. Adjust the current or voltage supplied to the fuel cell or stack.

In an exemplary embodiment of the invention, the alkali anion exchange membrane fuel cell or stack and the polymer electrolyte membrane fuel cell or stack are operated at the same or different voltages.

In embodiments of the present invention, a fuel cell device in which one or more alkali anion exchange membrane fuel cell or stack and one or more polymer electrolyte membrane fuel cell or stack are disposed alternately, wherein A fuel cell device in which an outflowing hydrogen gas flow tube flows into a polymer electrolyte membrane fuel cell or stack, and an air or oxygen gas flow tube from the polymer electrolyte membrane fuel cell or stack enters an alkali anion exchange membrane fuel cell or stack Its own humidification device is provided.

In an exemplary embodiment of the invention, the hydrogen gas flow tubes from the alkali anion exchange membrane fuel cell or stack are branched, one of the branched tubes flows into the alkali anion exchange membrane fuel cell or stack, and the remaining tubes are The polymer electrolyte membrane is introduced into a fuel cell or stack.

In an exemplary embodiment of the invention, the hydrogen gas flow tubes from the polymer electrolyte membrane fuel cell or stack are introduced into the alkali anion exchange membrane fuel cell or stack.

In an exemplary embodiment of the invention, the air or oxygen gas flow tubes from the polymer electrolyte membrane fuel cell or stack are branched, one of the branched tubes enters the polymer electrolyte membrane fuel cell or stack, and the remaining tubes are Alkali anion exchange membrane is introduced into the fuel cell or stack.

In an exemplary embodiment of the invention, air or oxygen flow tubes from an alkali anion exchange membrane fuel cell or stack are introduced into the polymer electrolyte membrane fuel cell or stack.

In an exemplary embodiment of the present invention, in the fuel cell device, the alkali anion exchange membrane fuel cell or the hydrogen gas supplied to the alkali anion exchange membrane fuel cell or stack passes through the alkali anion exchange membrane fuel cell or stack. Humidified by water generated in the stack.

In an exemplary embodiment of the present invention, in the fuel cell device, air or oxygen supplied to the polymer electrolyte membrane fuel cell or stack passes through the polymer electrolyte membrane fuel cell or stack, It is humidified by the resulting water and then supplied to an alkali anion exchange membrane fuel cell or stack.

In an exemplary embodiment of the invention, the fuel cell device comprises one or more alkali anion exchange membrane fuel cell or stack and one or more polymer electrolyte membrane fuel cell or stack arranged in series or in parallel.

In an exemplary embodiment of the invention, the power generated in one or more polymer electrolyte membrane fuel cell or stack or one or more alkali anion exchange membrane fuel cell or stack is used as the main power of the energy consuming device and supplies the main power. Alkali anion exchange membrane fuel cell or stack or polymer electrolyte membrane fuel cell or stack which is not used is used as an auxiliary power to the main power instead of the charging power of the secondary battery or the secondary battery.

In an exemplary embodiment of the invention, the fuel cell device further comprises a sensor for measuring the humidity of the humidified hydrogen gas and / or humidified air or oxygen, corresponding to the degree of humidification measured by the sensor, alkali And a current or voltage regulating device for regulating the current or voltage supplied to the anion exchange membrane fuel cell or stack and / or the polymer electrolyte membrane fuel cell or stack.

In an exemplary embodiment of the invention, the alkali anion exchange membrane fuel cell or stack and the polymer electrolyte membrane fuel cell or stack are operated at the same or different voltages.

According to embodiments of the present invention, the humidification is possible without a separate humidifier device, but without an additional humidifying cell, alternately arranging an alkali anion exchange membrane fuel cell or stack and a polymer electrolyte membrane fuel cell or stack. As a result, the size of the fuel cell system can be reduced, and the fuel power density can be increased.

In addition, an alkali anion exchange membrane fuel cell or stack and a polymer electrolyte membrane fuel cell or stack are provided separately, and there is no sharing of each component such as a gas diffusion layer or a current collector, so that individual control of current or voltage is not possible. It is easy.

1 is a schematic diagram illustrating a fuel cell device and its own humidification concept according to an embodiment of the present invention.
2 is a view showing in detail the gas flow in the fuel cell device of FIG.
FIG. 3 is a diagram illustrating an alkali anion exchange membrane fuel cell or stack and a polymer electrolyte membrane fuel cell or stack connected in parallel in an exemplary embodiment of the invention.
4 is a diagram showing that an alkali anion exchange membrane fuel cell or stack and a polymer electrolyte membrane fuel cell or stack are connected in series in another exemplary embodiment of the present invention.
5-7 illustrate examples of using dummy rods in an exemplary embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail.

In the present specification, a cell of an alkali anion exchange membrane fuel cell or a polymer electrolyte membrane fuel cell means a cell including all of an anode, a cathode, a membrane, a separator, and a gas diffusion layer.

In the present specification, self-humidification means humidifying hydrogen gas or air or oxygen by itself without a separate water supply from the outside of the fuel cell device.

In this specification, the humidification may mean not only humidifying the dry gas, but additional humidification of some humidified parts may be included in the meaning of humidification.

As used herein, the energy-using device includes all types of energy-using devices that are powered from a fuel cell device, such as automobiles, drones, motorcycles, ships, airplanes, submarines, robots, laptops, cell phones, etc. Includes all devices Such energy use devices include not only power supplied from a fuel cell device but also hybrid type energy use devices powered from a secondary battery.

Embodiments of the present invention share a gas flow of fuel and / or air (oxygen) in a fuel cell device comprising an alkali anion exchange membrane fuel cell and a polymer electrolyte membrane fuel cell.

1 is a schematic diagram illustrating a fuel cell device and a humidification concept according to an embodiment of the present invention, and FIG. 2 is a detailed view of gas flow in the fuel cell device of FIG. 1.

1 and 2, a fuel cell device according to an embodiment of the present invention is a fuel in which one or more alkali anion exchange membrane fuel cell or stack and one or more polymer electrolyte membrane fuel cell or stack are alternately disposed. As the battery device, the flow of hydrogen or air (oxygen) gas connects two different kinds of fuel cells as shown in Figs.

1 and 2 show that a polymer electrolyte membrane fuel cell stack is disposed on an alkali anion exchange membrane fuel cell stack. Here, the number of cells constituting each stack may be 1, 2, 3, ... n. Here, n is not particularly limited and may be 10000, for example. The total number of alkaline anion exchange membrane fuel cell stacks may be, for example, 1 to 1000. In addition, the total number of the polymer electrolyte membrane fuel cell stacks may also be 1 to 1000, for example.

As an example, in the embodiments of the present invention, one polymer electrolyte membrane fuel cell stack is composed of six polymer electrolyte membrane fuel cell cells as an arrangement of an alkali anion exchange membrane fuel cell stack and a polymer electrolyte membrane fuel cell stack, and two alkali Anion exchange membrane fuel cells can be constructed as one stack and placed together.

Alternatively, for example, three polymer electrolyte membrane fuel cell, one alkali anion exchange membrane fuel cell, three polymer electrolyte membrane fuel cell, and one alkali anion exchange membrane fuel cell can be arranged alternately. Alternatively, for example, one polymer electrolyte membrane fuel cell and one alkali anion exchange membrane fuel cell may be alternately arranged.

Each of these stacks or cells may be mounted on a separate frame to configure a corresponding fuel cell device with a plurality of frames, or may be mounted on one frame.

As shown in FIGS. 1 and 2, the fuel cell device includes at least one alkali anion exchange membrane fuel cell or stack and at least one polymer electrolyte membrane fuel cell or stack disposed adjacent to each other. They are connected to one another by a gas flow line of hydrogen gas or air or oxygen.

1 and 2, hydrogen reacts with hydroxide ions to produce water in an anode of an alkali anion exchange membrane fuel cell. Therefore, when hydrogen is supplied to the anode side of the alkali anion exchange membrane fuel cell (No. 1 in FIG. 1), the remaining hydrogen gas which is not used for the reaction in the hydrogen gas passes through the alkali anion exchange membrane fuel cell and exchanges the alkali anion. It can be self-humidified by the water produced in the membrane fuel cell. Here, the hydrogen gas provided on the anode side of the alkali anion exchange membrane fuel cell mainly uses dry hydrogen gas, but does not exclude the case of intentionally humidifying a part or the case of further humidification by self-humidification.

The self-humidified hydrogen is released from the alkali anion exchange membrane fuel cell (No. 2 in FIG. 1), and is supplied to the polymer electrolyte membrane fuel cell. Here, some of the released hydrogen (self-humidified hydrogen) may be circulated back to the anode side (No. 1 in FIG. 1) of the alkali anion exchange membrane fuel cell.

The humidified hydrogen supplied to the anode of the polymer electrolyte membrane fuel cell is decomposed into hydrogen ions and electrons. Hydrogen remaining without decomposition is discharged from the polymer electrolyte membrane fuel cell (No. 3 in FIG. 1). Here too, the released hydrogen (through the polymer electrolyte membrane fuel cell and again dried) can be circulated back to the anode side (No. 1 in FIG. 1) of the alkali anion exchange membrane fuel cell.

On the other hand, in the cathode of the polymer electrolyte membrane fuel cell, oxygen reacts with hydrogen ions to generate water. Therefore, when air or oxygen is supplied to the cathode side of the polymer electrolyte membrane fuel cell (No. 4 in FIG. 1), the remaining air or oxygen not used for the reaction in the air or oxygen passes through the polymer electrolyte membrane fuel cell, The water produced in the electrolyte membrane fuel cell can be self-humidified. The air or oxygen supplied to the cathode side of the polymer electrolyte membrane fuel cell may be dry air or oxygen, but rather it is the polymer that provides the air or oxygen in a somewhat humidified state and allows further humidification as it passes through the polymer electrolyte membrane fuel cell. Electrolytic membranes are preferred for operation of fuel cell or stack.

The humidified air or oxygen is discharged from the polymer electrolyte membrane fuel cell (No. 5 in FIG. 1) and supplied to the alkali anion exchange membrane fuel cell. On the other hand, it is preferable for the operation of the polymer electrolyte membrane fuel cell or stack so that the air or oxygen humidified in the fifth position is circulated back to the fourth position to be provided to the polymer electrolyte membrane fuel cell in the humidified state. .

Humidified air or oxygen is supplied to the cathode of the alkali anion exchange membrane fuel cell, of which oxygen reacts with water to produce hydroxide ions. Water in the humidified air or oxygen is removed by this reaction and electroosmotic drag. Dry air from which water has been removed is discharged from the alkaline anion exchange membrane fuel cell (No. 6 in FIG. 1). The air or oxygen released here can be circulated back to the fourth position.

More specifically, for example, at 65 ° C., the gas may absorb 9 mmol of water per liter. At this temperature, 1 liter of gas is composed of 37 mmoles of molecules, so under fully hydrated conditions it can be expected to consist of 28 mmoles of hydrogen and 9 mmoles of water.

In an alkali anion exchange membrane fuel cell anode reaction, 1 mmol of hydrogen produces 2 mmol of water. When the stoichiometric ratio is 7.2, 7.2 equivalents of hydrogen are fed to the alkali anion exchange membrane fuel cell, 6.2 equivalents of hydrogen and 2 equivalents of water are released from the alkali anion exchange membrane fuel cell, thus creating a fully humidified gas stream. have. If the stoichiometric ratio is 7.5, a 7.5% humidified gas stream can be produced if 7.5 equivalents of hydrogen are supplied.

7.5 If the alkaline anion exchange membrane fuel cell stack and the polymer electrolyte membrane fuel cell stack use the same current, and the polymer electrolyte membrane fuel cell stack has a 2.5 stoichiometric ratio, 7.5 stoichiometric ratio released from the alkali anion exchange membrane fuel cell stack The gas having can be divided into three hydrogen gas streams to supply 97% humidified hydrogen gas streams to three polymer electrolyte membrane fuel cell stacks each having a 2.5 stoichiometric ratio.

If a dry air stream is supplied to the polymer electrolyte membrane fuel cell stack anode at a stoichiometric ratio of 2.0, the air will consist of 2 equivalents of oxygen and 8 equivalents of nitrogen. The gas discharged from the polymer electrolyte membrane fuel cell stack anode is composed of 8 equivalents of nitrogen, 1 equivalent of oxygen, and 2 equivalents of water, and the gas flow has a relative humidity of 75%.

In the above calculation, the alkali anion exchange membrane fuel cell stack is 1/3 of the polymer electrolyte membrane fuel cell stack size, so the gas flow rate is tripled, and the alkali anion exchange membrane fuel cell stack gas flow has a humidity of 75%. Having a stoichiometric ratio, 24 equivalents of nitrogen, 3 equivalents of oxygen, and 6 equivalents of water are released from the alkali anion exchange membrane fuel cell stack. Thus, the total stack is 24 equivalents of nitrogen, 2 equivalents of oxygen, and 4 equivalents of water (ie, 55% relative humidity).

In embodiments of the present invention, self-humidification may be facilitated by alternately arranging an alkali anion exchange membrane fuel cell or stack and a polymer electrolyte membrane fuel cell or stack.

In addition, in the embodiments of the present invention, for example, when using a secondary battery together, the role of the alkaline anion exchange membrane fuel cell or stack and the polymer electrolyte membrane fuel cell or stack can be shared to increase the applicability.

That is, any one of the above two kinds of cells or stacks may be used for primary power production and the other may be used for charging the secondary battery for providing additional power (peak power) or for providing additional power itself. .

For example, it is preferred that the alkali anion exchange membrane fuel cell or stack be used to charge the secondary battery, and the polymer electrolyte membrane fuel cell or stack be used to produce basic power.

In addition, an alkali exchange membrane fuel cell or stack (or polymer electrolyte membrane fuel cell or stack) itself may be used to provide peak power (alternatively provided power at peak time), and an alkali exchange membrane fuel cell A cell or stack (or polymer electrolyte membrane fuel cell or stack) can be used with the secondary cell to provide peak power (power supplementally provided at the peak time).

For reference, a secondary battery is generally used together with a fuel cell to serve to receive excessive energy (charging of a secondary battery) or to provide additional power (discharging of a secondary battery).

In an exemplary embodiment, the fuel cell device preferably further comprises a sensor for measuring the humidity of humidified hydrogen gas and / or humidified air or oxygen. This sensor can be located in FIG. 1, for example, at 2 or 5 to measure the humidified state.

In exemplary embodiments of the invention, the current or voltage supplied to the alkali anion exchange membrane fuel cell or stack and / or the polymer electrolyte membrane fuel cell or stack is adjusted in response to the degree of humidification measured by the sensor. It may further include a current or voltage regulation device.

In embodiments of the present invention, in particular, an alkali anion exchange membrane fuel cell or stack and a polymer electrolyte membrane fuel cell or stack are provided separately, and there is no sharing of each component such as a gas diffusion layer or current collector, Individual control of current or voltage is easy.

Using this, the humidity of humidified hydrogen gas and / or humidified air or oxygen is sensed and the alkali anion exchange membrane fuel cell or stack and / or the polymer electrolyte membrane fuel cell or stack is corresponding to this sensing value. By adjusting the current or voltage to adjust the current or voltage supplied to the humidification degree, it is possible to adjust the degree of humidification, and further, to control the performance of each fuel cell or stack. Here, the current or voltage regulating device may be a processor or a computer that adjusts a required current or voltage according to the sensing value.

In an exemplary embodiment, if there is water flooding in the polymer electrolyte membrane fuel cell or stack (eg, it may be due to an external high temperature and high humidity environment), it is sensed by a humidity sensor and From this sensed result, the output voltage of the alkali anion exchange membrane fuel cell or stack can be adjusted to decrease. Conversely, if a polymer electrolyte membrane fuel cell or stack needs to be highly humidified (eg, due to an external low temperature drying environment), it can be sensed by a humidity sensor and from this sensed result The alkali anion exchange membrane can be adjusted to increase the power output of the fuel cell or stack.

In an exemplary embodiment, the alkali anion exchange membrane fuel cell or stack and the polymer electrolyte membrane fuel cell or stack can be operated at the same or different voltages.

3 is a diagram showing an alkali anion exchange membrane fuel cell or stack and a polymer electrolyte membrane fuel cell or stack in parallel in an exemplary embodiment of the invention, and FIG. 4 is an alkali in another exemplary embodiment of the invention. The anion exchange membrane fuel cell or stack and the polymer electrolyte membrane fuel cell or stack are shown in series.

In the case of parallel connection as shown in FIG. 3, the voltage is the same in each cell or stack, but the current changes according to the performance of each cell or stack.

On the other hand, in the case of being connected in series as shown in Figure 4, the voltage is different in each cell or stack, but the current is the same. As such, when the currents are the same, the alkali anion exchange membrane fuel cell or stack may limit the performance of the polymer electrolyte membrane fuel cell or stack. Therefore, as shown in FIGS. 1 and 2, the flow of gas is connected, but electrically preventing each fuel cell cell or stack separately may prevent the problem of the above performance limitation.

On the other hand, in the case of parallel or series connection, it is possible to adjust the difference in voltage and to prevent the reverse voltage through the additional use of a dummy load or a resistor (see FIGS. 5 to 7).

The fuel cell device according to the embodiment of the present invention may be connected to various energy use devices such as automobiles, unmanned aerial vehicles, motorcycles, ships, airplanes, submarines, robots, laptops, cell phones, and the like to transmit power.

According to the fuel cell device as described above, it is possible to humidify without a separate humidifier device, but alternately an alkaline anion exchange membrane fuel cell or stack and a polymer electrolyte membrane fuel cell or stack without a separate humidification cell. By arranging, the size of the fuel cell system can be reduced, and the fuel power density can be increased by 30% or more, for example, 32% or more.

While the invention has been described above with reference to exemplary embodiments, of course, various changes in technical details are possible without departing from the scope of the invention as set forth in the claims.

Claims (17)

A method of self-humidification of a fuel cell device in which at least one alkali anion exchange membrane fuel cell or stack and at least one polymer electrolyte membrane fuel cell or stack are disposed alternately,
Supplying hydrogen gas to an alkali anion exchange membrane fuel cell or stack; And
Supplying hydrogen gas discharged from the alkali anion exchange membrane fuel cell or stack to the polymer electrolyte membrane fuel cell or the stack; Self-humidifying method of a fuel cell device comprising a. The method of claim 1,
The method includes supplying air or oxygen to a polymer electrolyte membrane fuel cell or stack; And
Supplying air or oxygen moistened by water generated in the polymer electrolyte membrane fuel cell or stack to the alkali anion exchange membrane fuel cell or stack, as air or oxygen released from the polymer electrolyte membrane fuel cell or stack; Self-humidifying method of the fuel cell device comprising a. A method of self-humidification of a fuel cell device in which at least one alkali anion exchange membrane fuel cell or stack and at least one polymer electrolyte membrane fuel cell or stack are disposed alternately,
Supplying air or oxygen to the polymer electrolyte membrane fuel cell or stack; And
Supplying air or oxygen moistened by water generated in the polymer electrolyte membrane fuel cell or stack to the alkali anion exchange membrane fuel cell or stack, as air or oxygen released from the polymer electrolyte membrane fuel cell or stack; Self-humidifying method of the fuel cell device comprising a. The method according to any one of claims 1 to 3,
A portion of the humidified hydrogen is fed back to an alkali anion exchange membrane fuel cell or stack, or
Supply hydrogen gas released from the polymer electrolyte membrane fuel cell or stack back to the alkali anion exchange membrane fuel cell or stack,
Supplying part of the humidified air or oxygen back to the polymer electrolyte membrane fuel cell or stack;
A method of self-humidification of a fuel cell device, characterized by supplying air or oxygen released from an alkali anion exchange membrane fuel cell or stack back to the polymer electrolyte membrane fuel cell or stack. The method according to any one of claims 1 to 3,
The method measures the humidity of humidified hydrogen gas or humidified air or oxygen and in response to the measurement one or more cells selected from the group consisting of alkali anion exchange membrane fuel cell or stack and polymer electrolyte membrane fuel cell or stack. Or regulating a current or voltage of the stack. The method according to any one of claims 1 to 3,
The alkali anion exchange membrane fuel cell or stack and the polymer electrolyte membrane fuel cell or stack are connected in series or in parallel. A fuel cell device in which at least one alkali anion exchange membrane fuel cell or stack and at least one polymer electrolyte membrane fuel cell or stack are disposed alternately,
Hydrogen gas flow tubes from the alkali anion exchange membrane fuel cell or stack are introduced into the polymer electrolyte membrane fuel cell or stack,
Self-humidifying apparatus of a fuel cell device, characterized in that air or oxygen gas flow tubes from a polymer electrolyte membrane fuel cell or stack are introduced from an alkali anion exchange membrane fuel cell or stack. The method of claim 7, wherein
Hydrogen gas flow tubes from the alkaline anion exchange membrane fuel cell or stack are branched, one of the branched tubes flows into the alkali anion exchange membrane fuel cell or stack, and the other tube is transferred to the polymer electrolyte membrane fuel cell or stack. Self-humidifying device of the fuel cell device, characterized in that the flow. The method of claim 7, wherein
The hydrogen gas flow tube from the polymer electrolyte membrane fuel cell or stack is introduced into the alkali anion exchange membrane fuel cell or stack. The method of claim 7, wherein
The air or oxygen gas flow tubes from the polymer electrolyte membrane fuel cell or stack are branched, one of the branched tubes enters the polymer electrolyte membrane fuel cell or stack, and the remaining tubes are alkali anion exchange membrane fuel cell or stack. Self-humidifying device of the fuel cell device, characterized in that flowing into. The method of claim 7, wherein
The air or oxygen flow tube from the alkali anion exchange membrane fuel cell or stack flows into the polymer electrolyte membrane fuel cell or stack. The method of claim 7, wherein
In the fuel cell device, the hydrogen gas supplied to the alkali anion exchange membrane fuel cell or stack is humidified by water generated in the alkali anion exchange membrane fuel cell or stack while being discharged from the alkali anion exchange membrane fuel cell or stack. And then supplied to the polymer electrolyte membrane fuel cell or stack. 13. The method according to claim 7 or 12,
The fuel cell device may include an alkali after humidifying air or oxygen supplied to a polymer electrolyte membrane fuel cell or stack by water generated in the polymer electrolyte membrane fuel cell or stack while passing through the polymer electrolyte membrane fuel cell or stack. A fuel cell device characterized by being supplied to an anion exchange membrane fuel cell or stack. The method of claim 7, wherein
The power generated in the polymer electrolyte membrane fuel cell or stack or the alkali anion exchange membrane fuel cell or stack is used as the main power of the energy consuming device and does not supply the main power. Or the polymer electrolyte membrane fuel cell or stack is used as an auxiliary power to the main power instead of the charging power of the secondary battery or the secondary battery. The method of claim 7, wherein
The fuel cell device is characterized in that the alkali anion exchange membrane fuel cell or stack and the polymer electrolyte membrane fuel cell or stack are connected in series or in parallel. The method of claim 15,
And a dummy load is further connected to the alkali anion exchange membrane fuel cell or stack and the polymer electrolyte membrane fuel cell or stack. The method of claim 7, wherein
The fuel cell apparatus further includes a sensor for measuring humidity of at least one of humidified hydrogen gas and humidified air or oxygen, and corresponding to the degree of humidification measured by the sensor, an alkali anion exchange membrane fuel cell or stack; And a current or voltage regulating device for regulating a current or voltage supplied to at least one fuel cell or stack selected from the group consisting of a polymer electrolyte membrane fuel cell or a stack.

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