KR20190072327A - Appratus and method for reparing fuel cell - Google Patents

Abstract

The present invention relates to a fuel cell repair device for repairing a fuel battery cell, which includes: an electrolyte membrane having a membrane-reinforced layer embedded therein; an anode electrode formed on one surface of the electrolyte membrane; and a cathode electrode formed on the other surface of the electrolyte membrane. The present invention includes: a charging unit which charges an air flow path connected to the cathode electrode with a dispersion solution, wherein a particulate filler having a predetermined size is dispersed in working fluid capable of passing through the pores of the membrane-reinforced layer, in order to fill the pores of the membrane-reinforced layer; and a pumping unit which pumps the dispersion solution for the dispersion solution to be injected into the exposed part of the membrane-reinforced layer exposed to the outside due to damage of the electrolyte membrane, transfers the working fluid to the hydrogen flow path connected to the anode electrode through the pores of the membrane-reinforced layer, and fills the pores of the membrane-reinforced layer with the particulate filler. The present invention is improved to enable a selective repair.

Description

[0001] APPARATUS AND METHOD FOR REPELLING FUEL CELL [0002]

The present invention relates to an apparatus and method for repairing a fuel cell.

The fuel cell stack is a main power supply source of a fuel cell vehicle, and is a device that generates electricity through oxidation-reduction reaction of hydrogen and oxygen. This fuel cell stack has a structure in which a plurality of fuel cell cells are stacked.

Each of the fuel cell cells has a structure in which an electrolyte membrane, an anode, a cathode, a separation plate, and the like are stacked. The anode is supplied with high purity hydrogen from a hydrogen storage tank, and the cathode of the stack is supplied with atmospheric air supplied by an air compressor or other air supply device.

In the anode, the oxidation reaction of hydrogen proceeds to generate hydrogen ions (protons) and electrons. The generated hydrogen ions and electrons are transferred to the cathode through the polymer electrolyte membrane and the separator, respectively. Further, in the cathode, a reduction reaction involving hydrogen ions and electrons transferred from the anode and oxygen in the air supplied by the air supply apparatus proceeds to generate water, and at the same time, electrical energy is generated by the flow of electrons.

Generally, these fuel cell cells are connected in series. Therefore, if the electrolyte membrane of some fuel cell cells is damaged due to hotspots, chemical deterioration, or other causes, the overall performance of the fuel cell stack may deteriorate. Therefore, when it is determined that the electrolyte membrane of a part of the fuel cells has been damaged, the fuel cell stack is detached from the vehicle and all the fuel cells are disassembled while the electrolyte membrane is damaged. However, when the fuel cell cell having the electrolyte membrane damaged is damaged, it takes a lot of time to disassemble and reassemble the fuel cell. Also, when the fuel cell is disassembled and reassembled, There is a problem that secondary damage such as damage to a portion where the electrolyte membrane is damaged occurs and a problem that it takes a lot of cost to replace the fuel cell cell in which the electrolyte membrane is damaged with a normal fuel cell.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus and method for repairing a fuel cell cell in which an electrolyte membrane is reformed to be reusable without replacing a damaged fuel cell cell.

It is still another object of the present invention to provide an apparatus and method for repairing a fuel cell cell in which a fuel cell cell damaged in an electrolyte membrane can be selectively repaired without decomposing the fuel cell cells included in the fuel cell stack .

According to an aspect of the present invention, there is provided an apparatus for repairing a fuel cell cell, including: an electrolyte membrane embedded with a membrane-reinforced layer; an anode electrode formed on one surface of the electrolyte membrane; and a cathode electrode formed on the other surface of the electrolyte membrane The fuel cell cell maintenance apparatus for repairing a fuel cell cell according to any one of claims 1 to 3, wherein a particulate filler having a predetermined size to fill the pores of the membrane-reinforced layer is dispersed in a working fluid capable of passing through the pores of the membrane- A charging unit charging the air flow channel connected to the cathode electrode; And pumping the dispersion so that the dispersion liquid is injected into an exposed portion of the membrane-reinforced layer exposed to the outside due to damage of the electrolyte membrane, so that the working fluid flows through the pores of the membrane- And a pumping unit for filling the pores of the membrane-reinforced layer with the particulate filler.

Preferably, the diameter range of the particulate filler is larger than the diameter range of the pores of the cathode electrode, and falls within the diameter range of the pores of the film strengthening layer.

Preferably, the particulate filler is dispersed in the working fluid in colloidal form.

Preferably, the working fluid is water.

Preferably, the pumping unit includes a vacuum pump capable of forming a vacuum atmosphere in the hydrogen passage so that a negative pressure acts on the exposed portion of the film reinforcing layer.

Preferably, the vacuum pump forms the vacuum atmosphere in the hydrogen passage through the hydrogen discharge manifold of the fuel cell stack in which the fuel cell is installed.

Preferably, the vacuum pump discharges the working fluid transferred to the hydrogen flow path to the outside of the fuel cell stack through the hydrogen discharge manifold.

Preferably, the charging unit charges the dispersion liquid through the air supply manifold of the fuel cell stack in which the fuel cell is installed.

Preferably, the fuel cell further includes a filler removing unit for sweeping the potential of the fuel cell cell to remove the particulate filler deposited on the surface of the cathode electrode.

Preferably, the filler removal unit sweeps the potential using at least one of an electronic load and a heater electrically connected to the fuel cell.

According to another aspect of the present invention, there is provided a method of repairing a fuel cell, comprising: forming an electrolyte membrane having a membrane-reinforced layer embedded therein, an anode electrode formed on one surface of the electrolyte membrane, and a cathode electrode formed on the other surface of the electrolyte membrane (A) a particulate filler having a predetermined size so as to fill the pores of the membrane-reinforced layer, the method comprising the steps of: (a) providing a working fluid capable of passing through the pores of the membrane- Filling the dispersed dispersion liquid into an air flow path connected to the cathode electrode; And (b) pumping the dispersion so that the dispersion is injected into an exposed portion of the membrane-reinforced layer exposed to the outside due to damage of the electrolyte membrane, thereby allowing the working fluid to flow through the pores of the membrane- And passing the pores of the membrane-reinforced layer with the particulate filler.

Preferably, the diameter range of the particulate filler is larger than the diameter range of the pores of the cathode electrode, and falls within the diameter range of the pores of the film strengthening layer.

Preferably, the particulate filler is dispersed in the working fluid in colloidal form.

Preferably, the working fluid is water.

Preferably, the step (b) is performed by forming a vacuum atmosphere in the hydrogen passage so that a negative pressure is applied to an exposed portion of the membrane layer using a vacuum pump.

Preferably, the step (b) is performed by forming the vacuum atmosphere in the hydrogen flow path through the hydrogen discharge manifold of the fuel cell stack in which the fuel cell is installed.

Preferably, the operation (b) is performed by discharging the working fluid transferred to the hydrogen flow path to the outside of the fuel cell stack by using the vacuum pump.

Preferably, the step (a) is performed by charging the dispersion liquid into the air flow path through an air supply manifold of a fuel cell stack provided with the fuel cell.

Preferably, the method further comprises the step of (c) after the step (b), sweeping the potential of the fuel cell cell to remove the particulate filler deposited on the surface of the cathode electrode.

Preferably, the step (c) sweeps the potential using at least one of an electronic load and a heater electrically connected to the fuel cell.

The present invention relates to an apparatus and method for repairing a fuel cell, and has the following effects.

First, the present invention can repair a fuel cell having a damaged electrolyte membrane in a reusable manner, so that it is possible to reduce the cost of replacement of the fuel cell cell in which the electrolyte membrane is damaged.

Second, since the present invention can repair a fuel cell cell in which an electrolyte membrane is damaged without having to disassemble and reassemble the fuel cell cells, time required for disassembly and reassembly of the fuel cell cells can be reduced, It is possible to prevent secondary damage such as damage to the airtight portion of the gasket during the process of disassembly and reassembly.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a fuel cell repair apparatus according to a preferred embodiment of the present invention; FIG.
2 is a view showing a schematic configuration of a fuel cell;
3 is a view showing a state in which a dispersion liquid is filled in an air flow path of a fuel cell;
4 is a view showing an aspect in which a damaged portion of an electrolyte membrane is repaired by a dispersion liquid;
5 is a view showing an aspect in which a damaged portion of an electrolyte membrane is repaired by a dispersion liquid;
6 is a graph showing an aspect of sweeping the potential of the fuel cell.
FIG. 7 is a flowchart illustrating a method of repairing a fuel cell using the fuel cell repair apparatus shown in FIG. 1. FIG.
8 is a graph showing a crossover current of a normal fuel cell and a crossover current of a fuel cell in which an electrolyte membrane is damaged.
9 is a graph showing a crossover current of a normal fuel cell and a crossover current of a fuel cell repaired by the fuel cell repair apparatus.
10 is a graph showing the performance of the normal fuel cell and the performance of the fuel cell cell repaired by the fuel cell repair apparatus.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. Also, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a schematic configuration of a fuel cell repairing apparatus according to a preferred embodiment of the present invention, and FIG. 2 is a diagram showing a schematic configuration of a fuel cell.

FIG. 3 is a view showing a state in which a dispersion liquid is filled in the air passage of a fuel cell, FIG. 4 is a diagram showing a state in which a damaged portion of the electrolyte membrane is repaired by a dispersion, And Fig.

The fuel cell cell repair apparatus 1 according to the preferred embodiment of the present invention is configured to reuse the fuel cell 3 in which the electrolyte membrane 3a of the fuel cell 3 provided in the fuel cell stack 2 is damaged So that it can be repaired. Referring to FIG. 1, the fuel cell repair apparatus 1 may include a charging unit 10, a pumping unit 20, a filler removing unit 30, and the like. Hereinafter, the fuel cell repair apparatus 1 will be described with reference to a schematic configuration of the fuel cell 3 for convenience of explanation.

2, the fuel cell 3 includes an electrolyte membrane 3a in which a membrane-reinforced layer 3h is embedded, an anode electrode 3b laminated on one surface of the electrolyte membrane 3a, A plurality of gas diffusion layers 3d and 3e laminated on one surface of the cathode electrode 3c and one surface of the anode electrode 3b and a plurality of gas diffusion layers 3d 3e, and the like, which are stacked on the base plates 3e, 3e, respectively. Here, the electrolyte membrane 3a may include a pair of ionomer layers 3m and a membrane-reinforced layer 3h interposed between the ionomer layers 3m and impregnated with an ionomer. The film reinforcing layer 3h may be composed of a high-strength film made of a porous material for reinforcing the strength of the electrolyte film 3a. For example, the film strengthening layer 3h may be composed of PTFE (polytetrafluoroethylene). The pores of the film strengthening layer 3h are smaller than the pores of the gas diffusion layer 3e and have a larger diameter than the pores of the cathode electrode 3c. For example, the diameter range of the pores of the membrane reinforcing layer 3h may be 300 nm to 450 nm, the diameter range of the pores of the gas diffusion layer 3e may be 10 m to 100 m, and the diameter of the cathode electrode 3c The range may be between 10 nm and 100 nm.

Since the fuel cell 3 has the same configuration as that of the fuel cell stack included in the general fuel cell stack, a detailed description thereof will be omitted.

First, the charging unit 10 is a device for charging a dispersion liquid D for repairing the fuel cell 3 in which the electrolyte membrane 3a is damaged, into the air flow path 3j of the fuel cell 3. As shown in Fig. 2, the air passage 3j can be formed on one surface of the separator plate 3g facing the gas diffusion layer 3e as a channel for supplying air to the cathode electrode 3c. The air passage 3j of each fuel cell 3 included in the fuel cell stack 2 is connected to the air supply manifold 2a and the air discharge manifold 2b of the fuel cell stack 2 .

The dispersion liquid D is formed by dispersing the particulate filler F having a predetermined size in the working fluid W capable of passing through the pores of the film strengthening layer 3h so as to fill the pores of the film reinforcing layer 3h .

The particulate filler F has a diameter corresponding to the pore of the membrane-reinforced layer 3h so as to fill the pores of the membrane-reinforced layer 3h. For example, the diameter range of the particulate filler (F) is smaller than the diameter range of the pores of the gas diffusion layer (3e) so as to pass through the pores of the gas diffusion layer (3e) and can not pass through the cathode electrode Is larger than the diameter range of the pores of the cathode electrode 3c and belongs to the diameter range of the pores of the film strengthening layer 3h so as to be inserted into the pores of the film strengthening layer 3h to fill the pores of the film strengthening layer 3h. Preferably, the diameter range of the particulate filler (F) may be between 300 nm and 400 nm. The particulate filler F is preferably dispersed in the working fluid W in a colloidal state, but is not limited thereto.

The working fluid W is a fluid for conveying the particulate filler F so that the particulate filler F can stably reach the pores of the film strengthening layer 3h. The type of the working fluid W is not particularly limited. For example, the working fluid W may be water.

3, the charging unit 10 discharges the dispersion liquid D through the air supply manifold 2a of the fuel cell stack 2 to the air flow path (not shown) of each fuel cell 3 3j. The structure of the charging unit 10 is not particularly limited. 1, the charging unit 10 includes a storage tank 12 in which a dispersion liquid D is stored, and a storage tank 12 in which the dispersion liquid D stored in the storage tank 12 is pumped, 2 for injecting air into the air supply manifold 2a.

Next, the pumping unit 20 is a device for filling the pores located in the exposed portion 31 of the membrane-reinforced layer 3h with the particulate filler F, the electrolyte membrane 3a being damaged and exposed to the outside.

As shown in FIG. 3, if the ionomer layers 3m of the electrolyte membrane 3a are damaged due to hot spots, chemical deterioration, or other causes, the ionomer layers 3m are damaged, The cathode electrode 3c and the gas diffusion layers 3d and 3e are destroyed along the damaged ionomer layers 3m so that the membrane reinforcement layer 3c located at the damaged portion 3k of the ionomer layers 3m is removed, (3h) is exposed to the outside. When the fuel cell stack 2 is driven in such a state that the ionomer layers 3m are damaged so that the membrane-reinforced layer 3h is exposed to the outside, hydrogen passing through the hydrogen channel 3i flows into the membrane- The crossover phenomenon occurs, which is transmitted to the air flow path 3j through the pores located in the exposed portion 31 of the fuel cell 3. In this case, the performance of the fuel cell 3 is remarkably deteriorated, (3) may be burned. As shown in Fig. 3, the hydrogen flow path 3i can be formed on one surface of the separation plate 3f facing the gas diffusion layer 3d as a flow path for supplying hydrogen to the anode electrode 3b. The hydrogen flow path 3i of each fuel cell 3 included in the fuel cell stack 2 is connected to the hydrogen supply manifold 2c and the hydrogen discharge manifold 2d of the fuel cell stack 2 . For convenience of explanation, hereinafter, the case in which the ionomer layers 3m of the electrolyte membrane 3a are damaged so that the membrane strengthening layer 3h is exposed to the outside will be referred to as a case where the electrolyte membrane 3a is damaged.

The structure of the pumping unit 20 is not particularly limited. 1, the pumping unit 20 is provided with a vacuum pump 22 capable of forming a vacuum atmosphere (V) in the hydrogen flow path 3i of each fuel cell 3 . 1, the vacuum pump 22 is connected to the hydrogen flow path 3i of each fuel cell 3 through a hydrogen discharge manifold 2d of the fuel cell stack 2 in a vacuum atmosphere V) can be formed. 4, when a vacuum atmosphere (V) is applied to the hydrogen flow path 3i of each fuel cell 3 by using the vacuum pump 22, the electrolyte membrane 3a of the fuel cell 3 The dispersion liquid D filled in the air passage 3j of the damaged fuel cell 3 can be injected into the pores located in the exposed portion 31 of the film strengthening layer 3h. 4, the working fluid W among the dispersion liquid D injected into the exposed portion 31 of the membrane-reinforced layer 3h is introduced into the hydrogen channel 3i through the pores of the membrane-reinforced layer 3h, Lt; / RTI > 4 and 5, the particulate filler F in the dispersion liquid D injected into the exposed region 31 of the film strengthening layer 3h is filled with the pores of the film strengthening layer 3h Closing. That is, the particulate filler F is applied to the exposed portion of the film strengthening layer 3h to prevent the hydrogen crossover phenomenon from occurring through the pores located in the exposed portion 31 of the film strengthening layer 3h 3l) to close the pores.

The working fluid W transferred to the hydrogen flow path 3i through the exposed portion 31 of the film strengthening layer 3h is pumped by the vacuum pump 22 to be supplied to the hydrogen discharge manifold 3 of the fuel cell stack 2, (2d).

6 is a graph showing an aspect of sweeping the potential of the fuel cell.

Next, the filler removing unit 30 is a device for removing the particulate filler F deposited on the surface of the cathode electrode 3c from the cathode electrode 3c.

4, the working fluid W of the dispersion liquid D filled in the air flow path 3j flows through the electrolyte membrane 3a, the film reinforcing layer 3h, the electrodes 3b and 3c, The hydrogen can be transferred to the hydrogen passage 3j through the openings 3d and 3e. 5, when the working fluid W is injected into the gas diffusion layer 3e, the particulate filler F transferred by the working fluid W does not pass through the gas diffusion layer 3e And can be stacked on the surface of the cathode electrode 3e. The filler removing unit 30 is for removing the particulate filler F deposited on the surface of the cathode electrode 3c during the repair of the fuel cell 3 as described above.

6 (a) and 6 (b), the filler removing unit 30 sweeps the potential of the fuel cells 3 to form a particulate filler F) can be removed. The method of sweeping the potential of the fuel cell 3 is not particularly limited. For example, the filler removal unit 30 can sweep the potential of the fuel cell 3 using the electronic load 40 or the heater 50 electrically connected to the fuel cell stack 2. The heater 50 is preferably a COD integrated heater capable of removing residual hydrogen and residual oxygen remaining in the fuel cell 3, but is not limited thereto.

FIG. 7 is a flowchart illustrating a method for repairing a fuel cell using the fuel cell repair apparatus shown in FIG. 1. Referring to FIG.

Hereinafter, a fuel cell repair method using the fuel cell repair apparatus 1 will be described with reference to the drawings.

First, the charging unit 10 is operated to charge the dispersion liquid D into the air flow path 3j of the fuel cell units 3. [

Next, the pumping unit 20 is operated to form a vacuum atmosphere V in the hydrogen flow path 3i of the fuel cell 3. The dispersion liquid D filled in the air flow path 3j of the fuel cell 3 in which the electrolyte membrane 3a of the fuel cell 3 is damaged is exposed to the exposed portion 31 of the membrane reinforcing layer 3h Is injected into the pores located in the exposed portion 31 of the film strengthening layer 3h by the applied negative pressure. The working fluid W contained in the dispersion liquid D injected into the exposed region 31 of the film reinforcing layer 3h is discharged through the pores located in the exposed region 31 of the film reinforcing layer 3h, (3a) is transferred to the hydrogen passage (3i) of the damaged fuel cell (3). The particulate filler F contained in the dispersion liquid D injected into the exposed region 31 of the film strengthening layer 3h is filled with the pores located in the exposed region 31 of the film strengthening layer 3h .

Thereafter, the filler removing unit 30 is operated to sweep the potential of the fuel cell 3. Then, the particulate filler F deposited on the surface of the cathode electrode 3c can be removed from the cathode electrode 3c without passing through the pores of the cathode electrode 3c.

FIG. 8 is a graph showing a crossover current of a normal fuel cell and a fuel cell damaged by an electrolyte membrane, and FIG. 9 is a graph showing a crossover current of a normal fuel cell and a fuel cell repaired by the fuel cell repair device And FIG. 10 is a graph showing the performance of a fuel cell cell repaired by a normal fuel cell cell and a fuel cell repair device.

8, the fuel cell 3, in which the electrolyte membrane 3a is damaged, is damaged due to a crossover phenomenon of hydrogen through the exposed portion 31 of the film strengthening layer 3h, The performance of the fuel cell 3 is significantly lower than that of the fuel cell 3, and there is a risk that the fuel cell 3 is burned due to a direct reaction between hydrogen and oxygen. On the other hand, as shown in Figs. 9 and 10, the fuel cell 3, which is repaired using the particulate filler F, has almost the same performance as the normal fuel cell 3. Therefore, according to the fuel cell cell repair apparatus 1, the fuel cell 3 damaged by the electrolyte film 3a can be repaired in a reusable manner, so that the replacement (replacement) of the fuel cell 3 in which the electrolyte film 3a is damaged Thereby reducing the cost incurred by the user.

The fuel cell cell repair apparatus 1 can selectively repair the fuel cell 3 in which the electrolyte membrane 3a is damaged in a state where the fuel cell 3 is mounted on the fuel cell stack 2 . Therefore, according to this fuel cell cell repair apparatus 1, since the electrolyte membrane 3a can repair the damaged fuel cell 3 without the need to disassemble and reassemble the fuel cell 3, 3) can be reduced, and secondary damage such as damage to the airtight portion of the gasket during the disassembly and reassembly of the fuel cell 3 can occur Can be prevented.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

1: Fuel cell cell repair device
2: Fuel cell stack
3: Fuel cell
10: Charging unit
12: Storage tank
14: Pump
20: pumping unit
22: Vacuum pump
30: filler removal unit
40: Electronic load
50: heater
D: dispersion
W: working fluid
F: particulate filler

Claims (20)

1. A fuel cell cell repair apparatus for repairing a fuel cell cell comprising an electrolyte membrane having a membrane-reinforced layer embedded therein, an anode electrode formed on one surface of the electrolyte membrane, and a cathode electrode formed on the other surface of the electrolyte membrane,
A charging unit for charging a dispersion liquid in which a particulate filler having a predetermined size to fill the pores of the film reinforcing layer is dispersed in a working fluid capable of passing through the pores of the film reinforcing layer into an air flow path connected to the cathode electrode; And
The dispersion liquid is pumped so as to be injected into an exposed portion of the membrane-reinforced layer exposed to the outside due to the damage of the electrolyte membrane so that the working fluid flows into the hydrogen channel connected to the anode electrode through the pores of the membrane- And a pumping unit for filling the pores of the membrane-reinforced layer with the particulate filler. The method according to claim 1,
Wherein the diameter range of the particulate filler is larger than the diameter range of the pores of the cathode electrode and belongs to the diameter range of the pores of the membrane reinforcing layer. The method according to claim 1,
Wherein the particulate filler is dispersed in the working fluid in a colloidal form. The method according to claim 1,
Wherein the working fluid is water. The method according to claim 1,
Wherein the pumping unit includes a vacuum pump capable of forming a vacuum atmosphere in the hydrogen flow path so that negative pressure acts on the exposed portion of the film reinforcing layer. 6. The method of claim 5,
Wherein the vacuum pump forms the vacuum atmosphere in the hydrogen flow path through a hydrogen discharge manifold of a fuel cell stack in which the fuel cell is installed. The method according to claim 6,
Wherein the vacuum pump discharges the working fluid transferred to the hydrogen flow path to the outside of the fuel cell stack through the hydrogen discharge manifold. The method according to claim 1,
Wherein the charging unit charges the dispersion liquid into the air flow path through an air supply manifold of a fuel cell stack in which the fuel cell is installed. The method according to claim 1,
Further comprising a filler removing unit for sweeping the potential of the fuel cell cell to remove the particulate filler deposited on the surface of the cathode electrode. 10. The method of claim 9,
Wherein the filler removing unit sweeps the potential using at least one of an electronic load and a heater electrically connected to the fuel cell. A fuel cell repair method for repairing a fuel cell cell having an electrolyte membrane having a membrane-reinforced layer embedded therein, an anode electrode formed on one surface of the electrolyte membrane, and a cathode electrode formed on the other surface of the electrolyte membrane,
(a) filling a dispersion liquid in which a particulate filler having a predetermined size to fill pores of the membrane-reinforced layer is dispersed in a working fluid capable of passing through pores of the membrane-reinforced layer, into an air flow path connected to the cathode electrode; And
(b) pumping the dispersion so that the dispersion is injected into an exposed portion of the film-strengthening layer exposed to the outside due to damage of the electrolyte membrane, so that the working fluid is connected to the anode electrode through the pores of the film- And passing the pores of the membrane-reinforced layer to the hydrogen flow path and filling the pores of the membrane-reinforced layer with the particulate filler. 12. The method of claim 11,
Wherein the diameter range of the particulate filler is larger than the diameter range of the pores of the cathode electrode and belongs to the diameter range of the pores of the membrane reinforcing layer. 12. The method of claim 11,
Wherein the particulate filler is dispersed in the working fluid in a colloidal form. 12. The method of claim 11,
Wherein the working fluid is water. 12. The method of claim 11,
Wherein the step (b) is performed by forming a vacuum atmosphere in the hydrogen passage so that a negative pressure is applied to an exposed portion of the membrane layer using a vacuum pump. 16. The method of claim 15,
Wherein the step (b) is performed by forming the vacuum atmosphere in the hydrogen flow path through the hydrogen discharge manifold of the fuel cell stack in which the fuel cell is installed. 17. The method of claim 16,
Wherein the step (b) is performed by discharging the working fluid transferred to the hydrogen flow path to the outside of the fuel cell stack using the vacuum pump. 12. The method of claim 11,
Wherein the step (a) is performed by charging the dispersion liquid into the air flow path through the air supply manifold of the fuel cell stack in which the fuel cell is installed. 12. The method of claim 11,
(c) after the step (b), further comprising the step of sweeping the potential of the fuel cell cell to remove the particulate filler deposited on the surface of the cathode electrode . 20. The method of claim 19,
Wherein the step (c) sweeps the potential using at least one of an electronic load and a heater electrically connected to the fuel cell.

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