KR101951078B1 - High temperature Fuel Cell Unit-cell Assembly with Homopolar plates - Google Patents

Abstract

A pressurizable high-temperature type fuel cell unit cell assembly according to the present invention comprises: a stretchable hollow cell box; A plurality of cathode common plates arranged to be electrically integrated with the cell box in the cell box; A plurality of anode common plates disposed between the plurality of cathode anode plates in the cell box and connected to fuel inlet and outlet ends of the cell box; An electrolyte supporting matrix having a structure in which the anode common plate and the cathode common plate are surrounded to physically separate the plurality of anode common plates and the plurality of cathode common plates; A cathode electrode disposed between the plurality of cathode common plates and the electrolyte supporting matrix; And an anode electrode disposed between the plurality of anode common plates and the electrolyte supporting matrix, wherein the plurality of cathode common plates, the cathode electrode, and the cell box are electrically integrated to function as a cathode.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a high-temperature fuel cell unit cell assembly,

The present invention relates to a high temperature type fuel cell unit cell assembly capable of being pressurized, and more particularly, to a fuel cell unit cell assembly in which when a cell deteriorates due to an elapse of operation time or a performance of a cell due to a certain reason is reduced, And more particularly to a fuel cell unit cell assembly which can be used for a fuel cell.

A fuel cell is a device that directly converts chemical energy into electric energy through hydrogen oxidation reaction in the anode and oxygen reduction reaction in the cathode (cathode). As an embodiment of the fuel cell, a molten carbonate fuel cell injects a fuel gas convertible into hydrogen into a fuel electrode, and supplies carbon dioxide and air (oxygen) to the air electrode to induce an electrochemical reaction under a certain operating temperature It produces electricity.

The molten carbonate fuel cell having a method of converting the fuel gas into hydrogen in the battery is called an internal reforming molten carbonate fuel cell. The steam reforming reaction (steam reforming reaction, CH ₄ + 2H ₂ O ⇒ 4H2 + CO ₂ ), and commercial products are sold by FuelCell Energy and POSCO Energy in the US.

The steam reforming reaction is an endothermic reaction requiring proper heat energy to produce hydrogen. Since the reaction heat of the fuel cell is used as a direct energy source, when a certain amount of the reforming catalyst is placed inside the cell, the thermal equilibrium of the endothermic- So that an appropriate operating temperature can be maintained.

The fuel cell has a bipolar plate 0 composed of an anode current collector (or gas diffusion layer) having a gas flow path on both sides and a cathode current collector. An anode and a cathode are attached to each current collector to form a cell package When stacking the cell package and electrolyte membrane (or matrix) on the end plate according to the planned output and applying a constant load between the upper and lower end plates to improve the adhesion between the cell parts, Stack is completed.

However, in the case of polymer electrolyte fuel cells (PEMFC, DMFC) or medium temperature fuel cell (PAFC) operated at low temperature, since components constituting the cell package can be separated at room temperature, However, a molten carbonate fuel cell or a solid oxide fuel cell, which is a high temperature type fuel cell, has a structure in which separation-reloading is impossible. This is because, in the case of a molten carbonate fuel cell, the electrolyte in a liquid state is uniformly distributed in the fuel electrode and the air electrode at the operating temperature, and when the temperature is lowered, a matrix between the cell package and the cell package and a solid body in which the electrolyte in the fuel electrode- .

Since the solid oxide fuel cell uses a solid oxide which is susceptible to thermal deformation as an electrode and a support component and is manufactured from an electrode assembly in which an anode, an electrolyte and a cathode are integrated in the manufacturing process in order to minimize contact resistance, It becomes difficult. In addition, when the fastening load is removed, if there is a weak vicinity due to any reason, it will cause breakage such as a crack and cause permanent damage.

Therefore, in a high temperature type fuel cell, it is not possible to separate only the cells from the assembly in the prior art, even if the performance of one or several cells in a stack of several hundred cell packages is reduced or a fatal defect occurs. We have no choice but to dispose of ourselves.

The electrode manufacturing process of the molten carbonate fuel cell is performed by a separate process in which the electrode size is 7,000 cm 2 or more to assure the output per unit cell of 850 W or more. The slurry in which the organic material and the raw material are mixed is evenly dispersed to form a long roll, or the metal powder as a raw material is uniformly distributed on a support and then sintered in a high-temperature reduction furnace. After the anode and the cathode are adhered to the anode reaction part and the cathode reaction part in the cell package assembling process, the prepared electrode is made to be one cell package by increasing the contact degree by applying a certain load. However, the electrode manufacturing process of the prior art requires an expensive manufacturing apparatus and has a disadvantage of high manufacturing cost because it is composed of a plurality of processes.

On the other hand, in the conventional technology in which the separator is introduced, the output limitation of the stack due to the increase of the contact resistance is recognized as a serious technical difficulty. In the process of making the cell package, a plurality of metal plates are overlapped and welded, and an electrode manufactured through a separate process is physically attached. In this case, a corrosion layer is formed at the contact point between the electrode and the metal plate, and the formed corrosion layer acts as an electrical resistance between the electrode and the metal plate, thereby increasing the resistance, resulting in a voltage drop and a local temperature rise, And shorter life span. In addition, stacks fabricated by laminating hundreds of cells have a phenomenon in which they are deflected in one direction from a certain vicinity due to a temperature gradient in the stack height direction and a temperature gradient occurring between the inlet and outlet of each cell sheet. This results in a load distribution that deflects the distribution of the applied fastening force in a specific direction using an external structure to improve the contact of the cells, and as a result makes contact between the cell parts difficult.

In order to solve this problem, the prior art attempts to adjust the distribution of the reforming catalyst inside the stack, to improve the quality of parts production, or to uniformize the temperature and composition of the reaction gas introduced into the stack, The contact resistance generation and deepening can not be completely controlled.

Since the manufacture of a cell package also requires assembling and integrating a number of components, a large amount of adhesive must be used at room temperature. This is a material that is not needed for the electrochemical reaction that produces electricity and is removed through a separate pretreatment process.

(Patent Document 1) KR10-1137055 B

(Patent Document 2) KR10-1270456 B

(Patent Document 3) KR10-1264163 B

(Patent Document 4) KR10-1198851 B

(Patent Document 5) KR10-1198629 B

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a homopolar plate cell package which can not be realized in a conventional bipolar plate fuel cell cell package, The purpose of that is to do. It is still another object of the present invention to provide a method of manufacturing an electrode which is disposed on a common electrode plate and a common electrode plate in a cell package box capable of cell separation.

Specifically, one cell package box has a structure in which several anode (anode) cathode plates and cathode (cathode) cathode plates are sequentially disposed in a box and surrounded by a matrix impregnated with an electrolyte, and the cathode plate has a plurality of pores There is an electrolyte reservoir for buffering changes in the composition of the electrolyte during a long-term operation for several tens of thousands of hours, and the cathode cathode plate is integrated with the cell box to become the cathode An anode plate is integrally formed with a fuel distributor of a gas inlet and a cathode and finally a single cell composed of an anode and a cathode is realized and a method of manufacturing the same, a method of manufacturing a unit cell using the cell package, Temperature fuel cell capable of being replaced.

In order to accomplish the above object, the present invention provides a pressurizable high-temperature type fuel cell unit cell assembly, wherein a plurality of anode common plates and cathode cathode plates are sequentially disposed in one cell box, and a plurality of cathode cathode plates are arranged in parallel And a plurality of anode common plates disposed inside the cell box are connected in parallel with the fuel inlet and outlet ends to form an anode.

The anode plate consists of a reaction part, a wet seal part, an inlet gas distributor, an outlet gas collector, and a fuel supply distributor. Each part must be electrically integrated so as to have an anode polarity. .

The reaction part is composed of a perforated sheet including a plurality of pores, an inner support for supporting a gas flow and a load inside, and the piercing part of the reaction part has the same current collecting function as the current collector in the prior art separating plate The electrode supporting function, which is another role of the current collector of the prior art, is performed by the inner supporting member located inside the anode coater plate, that is, below the reaction unit.

When the inner support is used as the gas flow portion, only the inner support is used when the hydrogen gas is used, and when the natural gas which makes hydrogen by the steam reforming reaction or the fuel having the similar property is supplied, the catalyst is completed.

The inner support of the anode anode plate is capable of progressive form and has the function of supplying the same amount of gas to both sides of the anode anode plate. The inner support is fabricated by machining a thin sheet of stainless steel and is designed to withstand the fluid flow uniformity and constant load at operating temperature.

The boundary between the reaction part and the? Seal part of the anode anode plate has a height step as much as the electrode height.

The method of positioning the anode in the reaction part can be performed by a coating technique such as electrostatic powder spray coating, electrostatic spray deposition, or arc plasma coating, (Ni-Cr) alloy powder or nickel-chromium aluminum (Ni-Cr-Al) alloy powder. The porous sintered anode or the in- It can be fixed with an adhesive.

The reaction part and the? Sealing part are covered with the matrix with respect to the anode common plate including the anode, and when the electrolyte is melted and filled at the operating temperature, the gas leakage can be blocked. Particularly, the matrix and the electrolyte are uniformly applied to the side portion of the reaction part of the anode common plate to constitute an ionic electric circuit.

The inlet gas distributor of the anode anode plate is made to be dispersed in a triangular shape having a specific angle in the fuel supply distributor of the gas supply section so that fuel having a uniform composition and flow rate is drawn into the reaction section, It is also possible to produce a hollow rectangular shape with a baffle for changing the flow path and ensuring uniformity.

Bellows is located between the gas distributor and the fuel distributor to buffer the thermal expansion of the material, especially at the operating temperature, and the fuel distributor that supplies a constant flow rate has as many supply tubes as the number of gas distributors. The collecting device at the outlet end for collecting the anode exhaust gas is also made to have the same structure as the gas distributor, so that the anode separator can secure complete gas tightness and have a structure capable of being pressurized.

Therefore, the anode anode plate is manufactured by forming a stainless steel sheet into a plate metal mold, completing the shape by laser or plasma welding, directly growing the electrode using a coating technique such as an arc plasma coating method, When the matrix is sequentially stacked, a cell box capable of producing electric power of about 1 kW is completed.

The cathode anode plate has a reaction part, a sealing part and an inner support body which are the same as the structure of the anode anode plate, except that the gas distributor is present only at the fuel outlet. The boundary between the reaction part and the seal part has a height step as much as the electrode height,

Nickel, nickel oxide or nickel, which is the raw material of the cathode, and electrolyte (electrolyte) are deposited on the reaction part by coating techniques such as electrostatic powder spray coating, electrostatic spray deposition and arc plasma coating. A powder mixture or a mixture of nickel oxide and an electrolyte powder is directly grown on the anode plate reaction part. When the porous sintered cathode or the in-situ cathode is fixed to the reaction part, it can be fixed using an adhesive.

The gas inlet portion of the cathode anode plate is an open type without a triangular plenum having a corrugated tube used in the anode copper plate, and the gas outlet portion has a triangular plenum with corrugated tubes. The reason that the cathode gas inlet is opened is to uniformly introduce the reactant gas having the same composition and the same temperature, and the temperature of the cathode inlet determines the operating temperature of the stack composed of dozens of cell boxes.

The characteristics of the cathode anode plate include a solid cathode anode plate and a cathode cathode anode plate. The cathode cathode plate is electrically integrated with the inner wall of the cell box by a welding method such as resistance welding.

On the other hand, the entire structure of the cell box electrically connects each of the cathode anode plates to the cell box, and the cell box thus manufactured is electrically integrated with the cathode cathode plate existing therein to become a cathode electrode. The contact resistance caused by the lowering of the physical contact rate can be minimized.

In the prior art stack of several hundred kW class, hundreds of bipolar and matrix matched with the anode electrode and the cathode electrode attached to the upper end and the lower end of the separator are sequentially stacked. However, when a cell is broken or a fatal defect is expected in a stack composed of several hundred cells during operation, it is not possible to separate only the corresponding cell due to the structural characteristics of the separator, The electrochemical reaction of the fuel cell is completely blocked, and additional costs are excessively incurred in view of operation maintenance.

On the contrary, since the modular 1kW cell box proposed in the present invention has the cell box and the cell box separately electrically and physically, it is possible to separate the cell box and the cell box according to need, Also, it is possible to pre-process only the 1 kW cell box itself, which is not possible with the prior art, and thus it is possible to provide only the number of replacement cells according to the time required.

On the other hand, since the cell box capable of 1kW-class modularization is formed by integrating the enclosure stainless steel plate and the cathode anode plate constituting the cell box using separate connecting bodies and forming the anode anode plate and the electric circuit, The contact resistance between the separator plate-current collector and the current collector-electrode which is a technical difficulty of the technology can be significantly reduced, so that the reduction rate of the power generation amount and the power generation efficiency can be minimized compared with the prior art, and economical efficiency can be secured.

In the case of a dicarbonate fuel cell in the prior art, it is absolutely necessary to perform a pretreatment process for decomposing and removing all the organic materials used in the production process and for performing in situ oxidation-reacification in which a cathode composed of nickel and an electrolyte is reacted with lithium ions. The pretreatment process should proceed from the room temperature to the operating temperature of the product for about 200 hours while varying the gas flow rate and composition. The emphasis should be placed on the thermal distribution management inside the stack during the pretreatment process. If the temperature management fails, the product may fail to exhibit performance and may be subject to disposal. However, since the main components of the 1 kW class module cell box proposed in the present invention, that is, the anode, the cathode and the matrix are manufactured by directly growing the same on the anode plate, no organic material is used, There is no need to carry out the process. Also, when it is necessary to confirm the power generation performance through the same process as the pre-treatment process, the process can be completed within about 100 hours, and only one cell box can be pretreated. This technical advantage is the best way to reduce the manufacturing cost.

The size of one cell of the stack produced in the prior art has a reaction area of up to 8,000 cm ² and the flow direction is a cross flow type in which the anode gas and the cathode gas cross each other. The temperature difference between the maximum and minimum temperatures of one cell is about 120 ° C because the temperature of the cell region near the anode exit side and the cathode exit side is relatively high. This temperature difference causes a stress distribution in the height direction of the stack, and changes the physical properties of the electrode in the corresponding region, adversely affecting performance and lifetime.

However, since the cell box using the anode plate proposed in the present invention has a reaction area of about 1500 cm 2, it has the same effect as laminating one cell of the prior art into several cells, The mechanical dynamic behavior due to the reaction and the heat flow is relatively small, and the change in physical properties of the electrode is relatively small. Therefore, the ease of thermal management has been greatly increased as the number of cells with small reaction area is increased.

The prior art fixes independent manifolds at the inlet-outlet of the anode and at the outlet of the cathode because the gas supply is cross flow. Due to the characteristic of the cross flow, the heat of reaction is transferred to a specific region where the anode outlet and the cathode outlet meet during the heat transfer process, thereby forming a high-temperature reaction region. This portion has a relatively high temperature, so that the volatilization rate of the electrolyte is high, and the physical properties of the electrode are large, which causes the performance of the cell to be reduced.

However, the cell box technology proposed in the present invention is capable of both a coflow flow and a counter flow flow in which the anode gas and the cathode gas flow in the same direction, thereby minimizing the high temperature reaction region of the prior art , Thereby prolonging the long-term operating life of the stack and maintaining high power generation efficiency for a long time.

In addition, 1kW modularized cell box made of co-extruded plate has the merit of making customized product with power generation capacity demanded by consumers, so it is possible to launch a product that can respond to various demands immediately and expand application field .

1 is a schematic view of a cell box constituting a fuel cell unit cell assembly according to the present invention,
Fig. 2 is a schematic view of the configuration of the cathode anode plate proposed in the present invention, and Fig.
3 is a schematic view of the anode common plate and the fuel cell unit cell assembly proposed in the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of other various forms of implementation, and that these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know completely. Wherein like reference numerals refer to like elements throughout.

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 present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components 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. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

Hereinafter, a high temperature type fuel cell unit cell assembly capable of being pressurized according to the present invention will be described with reference to FIGS. 1 to 3. FIG.

The cell box 100 using the co-current plate proposed in the present invention is intended to produce a power of 1 kW through the generation of a voltage of less than 1 V and a current of 1000 A or more. For this purpose, it is preferable that three anode anode plates 410, two cathode anode plates 220, and two cathode anode plates 210 are provided, but in order to increase the amount of power according to the design capacity, It is also possible to increase the number of anode anode plates and cathode cathode plates to 3 or more in the box. For an output of 1 kW, when the apparent area of the anode and the cathode on one side of the anode plate is 1500 cm 2, one anode plate has an apparent reaction area of 3000 cm 2 in total.

The anode plate is manufactured by forming the upper and lower plates of the anode plates 210, 220 and 410 through the mold design and forming the inner supports 221 and 401, the plenums 223 and 403, the bellows 224 and 406, 229, and 407, respectively.

The anode anode plate is prepared by loading the reforming catalyst in accordance with the internal reforming rate design of the manufactured inner support, then fixing it on the lower plate, and then integrating the upper plate and the lower plate through laser welding. When the plenum 403 and the bellows 406 are welded to the integrated anode plate in this order, the anode anode plate is completed.

The anode electrode is fabricated by directly coating the upper and lower anode portions of the anode using a transfer coating method or an arc plasma coating method. The anode material is a Ni-Cr-Al alloy powder that is commonly used in MCFC technology. It is coated with a porosity of 45% or more and a thickness of 0.1 mm or more as determined through experiments. For example, the anode electrode manufacturing process using the arc plasma coating method has a plasma generating DC current of 60 A or more, and a working distance between the plasma nozzle and the anode plate is 60 mm or more. Instead of completely dissolving the raw material powder into the plasma, The reaction part had to be coagulated and coated, and it was possible to secure a thickness of 0.1 mm and a porosity of 45% or more.

The cathode anode plate is subjected to the same manufacturing process as that of the anode anode plate. However, there is a difference between preparing the inner support body 221 in which the electrolyte is loaded in the inner support body and preparing the electrolyte supplement 228. In more detail, after the inner support body 221 loaded with the electrolyte is fixed to the bottom plate of the cathode copper plate, the top plate is positioned thereon and integrated by laser welding. Then, the gas outlet side plenum 223 and the bellows 224 are sequentially welded. Next, the nickel powder or the nickel oxide powder is sequentially coated on the upper and lower reaction parts using the arc plasma coating method. In the electrode production using the arc plasma coating method and the nickel powder as raw materials, the thickness was 0.75 mm or more and the porosity was 78%. In order to secure the optimum power of the molten carbonate fuel cell, an electrolytic suspension in which the calculated required electrolytes are subdivided into a cathode electrode plate 200 and a cathode electrode 200 manufactured by an arc plasma coating method located on the lower plate, It is prepared by applying the calculated amount by natural infiltration several times. The electrolyte applied to the cathode electrode is naturally permeated into the micropores by the capillary force and gravity, and a suspension having electrolyte particles smaller than the size of the micropores should be used for smoothly proceeding. The electrolyte impregnated amount of the cathode electrode thus formed was able to be impregnated into the cathode pores by 50 vol% or more.

A cathode half-shell plate is prepared in the same manner, and a drying process is performed to remove all of the solvent of the applied electrolyte suspension. Drying is performed using a dry box that is shut off from the outside, and after the outside air is drawn into the drying box at a fixed temperature of 50 ° C or higher, the solvent is volatilized through the discharge to the outside. More preferably, a drying furnace capable of continuous drying is useful for mass production.

The dried cathode is again coated with Al ₂ O ₃ or LiAlO ₂ to form a matrix layer. For example, the matrix produced by the arc plasma coating method has a thickness of 0.4 t or more and a porosity of 45 vol%, preferably a plasma main power of 100 A or more, and a working distance between the plasma torch and the cathode of 60 mm or more

1, the cell box includes a cell enclosure 100, a cathode electrode 200, a cathode half-cathode plate 210, a cathode cathode plate 220, a cathode connection terminal 225, an electrolyte- 300, an anode electrode 400, and an anode common electrode plate 410.

In a cell box of the present invention, a high-temperature type fuel cell is provided with a cushioning balloons (hereinafter referred to as " cushion balloons ") capable of buffering the expansion and contraction 110). The cathode anode plate 220 is a principle in which the cathode connection terminal 225 is welded to the cell box 100 so as to electrically connect the cell box 100, and as a result, the cell box becomes a cathode.

The anode anode plate 410 should be physically non-contact with the cell box 100 and connected to the anode solder 407 in FIG. 3 to become one anode. Since the cell box of the present invention has a precondition that ion conduction between the anode and the cathode should be perfect, the electrolyte-matrix is formed between the anode common electrode plate 410 and the cathode common electrode plate 220, the anode common electrode plate 410, The plate 210 must be present.

2, it is necessary that an electrolyte for ion conduction be present at a site physically contacting the cell box 100, and for this purpose, the electrolyte supplement 227 is connected to the cathode common electrode plate 220).

The configuration of the cathode anode plate will be described with reference to Fig.

The cathode anode plate 220 manufactured by metal mold processing is constituted of a cathode inner support 221, a cathode electrode 200 and a seal portion 226 for supporting a load and a pivot plate 222 for aligning a height difference have.

The reaction part in which the cathode 200 of the cathode anode plate is located includes a plurality of pores and serves as a support for supplying air, carbon dioxide, water vapor, and maintaining the shape of the electrode. The diameter of the perforation is preferably 0.5 mm or less, and preferably 20 or more per unit area, and is manufactured by perforating mold or laser processing.

In order to supply the proper electrolyte of the cell box, the inner support 221 is loaded with an electrolyte and includes an electrolyte supplement 228 for automatically supplying the electrolyte consumed during long-term operation in real time.

In order to minimize the reaction resistance, the thickness of the cathode electrode 200 is preferably 0.7 t or more, which is proposed in the literature, and the size of the cathode is preferably 500 mm or 300 mm. When the cathode anode plate 220 made up of various parts is completed, a gas trapping portion composed of the plenum 223 and the bellows 224 is joined to the cathode outlet side by laser welding to form the cathode cathode plate 220 having the final cathode electrode and the electrolyte. .

Two cathode cathode plates and two cathode cathode plates 210 are placed in the cell box, and a half cathode plate is manufactured in the same manner. Then, the four gas collecting parts are welded to one cathode outlet header to integrate the same to obtain the same polarity.

An anode common plate and an assembly will be described with reference to FIG.

In the anode common electrode plate 410, the anode electrode 400 is located in the anode reaction portion, and the anode inner support 401 and the reforming catalyst 402 are present therein.

In order to prevent the mixing of the anode gas and the cathode gas, a sealing portion 403 is disposed at the end of the anode electrode. As discussed in the cathode anode plate, the anode anode plate also has a simplicity 405 to match the height difference of the anode electrode and the anode.

The anode anode plate has an anode plenum 404 at each of the inlet and outlet in order to uniformly supply the anode gas having a constant flow rate and composition, and has a bellows 406 for alleviating the thermal expansion contraction during the operation temperature.

In particular, the anode plenum 404 maintains the shape of a triangular shape biased to one side. This is to prevent overlap with the position of the cathode plenum 223. A baffle is also provided inside the plenum to distribute the gas direction and flow rate to direct the feed gas that has passed through the plenum uniformly to the anode reaction zone. The anode anode plates thus fabricated are integrated with the anode hooders 407 to complete the anode electrode assembly having the same polarity.

The reforming catalyst 402 located inside the anode anode plate is a catalyst capable of converting natural gas, diesel, biogas, and anaerobic digestion gas into hydrogen, and is loaded with different shapes, .

Hereinafter, a manufacturing process of the high temperature type fuel cell unit cell assembly according to the present invention will be described with reference to FIGS. 1 to 3. FIG.

As shown in FIG. 1, the manufactured anode and cathode anode plates are sequentially laminated in a cell box divided into a left-side portion and a right-side portion, followed by a laser welding process.

At this time, in order to replenish the electrolyte during the long-term operation of the cathode electrode, the anode common electrode plate and the cathode common electrode plate should be laminated while the electrolyte supplement 228 described in FIG. 2 is positioned above and below the cathode common electrode plate.

In order to improve the contact between the anode and the cathode electrode during stacking, the cell box receives a surface pressure of 6 kgf / cm 2 or more on the left and right sides.

In order to improve the electrical contact between the cathode anode plate and the cell box, the cathode connection terminal 225 is inserted into the cathode anode plate and the cell box, and is integrated by resistance welding or laser welding.

As shown in FIG. 3, in order to electrically integrate the anode current collector plate, three ballozles of the anode current collector plate are integrally welded to the anode current collector. More specifically, the anode current collector is composed of two left- The left side that meets the bellows has 3 holes at the time of manufacture, and the bellows is inserted into the bellows, and the weld is integrated by welding from the inside of the header, and the right side of the header is welded to the left side.

When manufactured in this way, it can be seen that the three anode anode plates become the anode with the same polarity. The outlet bellows of the cathode cathode plate and the cathode cathode plate header are welded in the same process.

When the above manufacturing and assembling process is completed, a modularized cell box having an anode and a cathode polarity as shown in FIG. 1 is completed.

As described above, the pressurizable high-temperature type fuel cell unit cell assembly according to the present invention can be separated as needed because the plurality of cell boxes are electrically and physically separated from each other. Thus, compared to the prior art in which the stack itself is replaced, It is possible to pre-process only the 1 kW cell box itself, which is not possible with the prior art, and thus it is possible to provide only the number of replacement cells according to the required time.

It is to be understood that the terms "comprises", "comprising", or "having" as used in the foregoing description mean that the constituent element can be implanted unless specifically stated to the contrary, But should be construed as further including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

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.

Claims (17)

A stretchable hollow cell box;
A plurality of cathode common plates arranged to be electrically integrated with the cell box in the cell box;
A plurality of anode common plates disposed between the plurality of cathode anode plates in the cell box and connected to fuel inlet and outlet ends of the cell box;
An electrolyte supporting matrix having a structure in which the anode common plate and the cathode common plate are surrounded to physically separate the plurality of anode common plates and the plurality of cathode common plates;
A cathode electrode disposed between the plurality of cathode common plates and the electrolyte supporting matrix; And
And an anode electrode disposed between the plurality of anode common plates and the electrolyte supporting matrix,
Wherein the plurality of cathode common plates, the cathode electrode, and the cell box are electrically integrated to function as a cathode.
A pressurizable high temperature type fuel cell unit cell assembly.
The method according to claim 1,
Wherein the cathode-
A reaction part constituting between the cathode electrodes, a? Seal part arranged outside the reaction part, and an inner support constituting the reaction part,
Wherein a boundary point between the reaction part and the < RTI ID = 0.0 > seal < / RTI >
A pressurizable high temperature type fuel cell unit cell assembly.
3. The method of claim 2,
Wherein the cathode-
Wherein the inner support is in a progressive form and the cathode cathode plate supplies an equal amount of gas to both sides,
A pressurizable high temperature type fuel cell unit cell assembly.
3. The method of claim 2,
Wherein the cathode-
A main cathode anode plate disposed at regular intervals in the cell box and a half cathode cathode plate welded to the inner surface of the cell box through welding,
A pressurizable high temperature type fuel cell unit cell assembly.
3. The method of claim 2,
Wherein the cathode-
Nickel, nickel, and an electrolyte powder mixture through any one of coating methods including electrostatic powder spray coating, electrostatic spray deposition, and arc plasma coating. And cathode raw materials including a mixture of nickel oxide and an electrolyte powder are directly grown on the reaction part of the cathode cathode plate in the anode plate reaction part,
A pressurizable high temperature type fuel cell unit cell assembly.
6. The method of claim 5,
Wherein the electrolyte supporting matrix is formed by direct coating on the cathode anode plate,
A pressurizable high temperature type fuel cell unit cell assembly.
The method according to claim 6,
Wherein the electrolyte supporting matrix is supplied as a suspension onto the cathode or cathode electrode,
A pressurizable high temperature type fuel cell unit cell assembly.
3. The method of claim 2,
The reacting portion of the cathode copper plate may include:
And a plurality of pores for preventing the deformation of the cathode anode plate, wherein the reaction gas introduced through the inner support is directly supplied to the cathode electrode,
A pressurizable high temperature type fuel cell unit cell assembly.
The method according to claim 1,
Wherein the anode common plate comprises:
A fuel gas distributor for supplying fuel to the reaction part, an inlet gas distributor, and an outlet gas collector for collecting the reacted gas in the reaction part. Wherein the reaction unit includes a perforated plate including a plurality of perforations, and an inner support for supporting a gas flow and an internal load,
A pressurizable high temperature type fuel cell unit cell assembly
6. The method of claim 5,
A nickel-chromium (Ni-Cr) alloy powder or a nickel-chromium alloy powder may be formed through any one of coating methods including electrostatic powder spray coating, electrostatic spray deposition, and arc plasma coating. Nickel-chromium aluminum (Ni-Cr-Al) is directly grown on the reaction part of the anode-
A pressurizable high temperature type fuel cell unit cell assembly.
6. The method of claim 5,
Wherein the anode common plate comprises:
Wherein the inner support is in a progressive form and supplies the same amount of gas to both sides of the anode common plate,
A pressurizable high temperature type fuel cell unit cell assembly.
6. The method of claim 5,
Wherein a boundary point between the reaction part of the anode common electrode and the < RTI ID = 0.0 > seal < / RTI >
A pressurizable high temperature type fuel cell unit cell assembly.
10. The method of claim 9,
Wherein a corrugated tube is disposed between the fuel supply distributor and the inlet gas distributor,
A pressurizable high temperature type fuel cell unit cell assembly.
10. The method of claim 9,
Wherein the inlet gas distributor includes a baffle for smooth distribution of gas,
A pressurizable high temperature type fuel cell unit cell assembly.
10. The method of claim 9,
Wherein the anode common plate of the cell box has a structure electrically connected to the fuel supply distributor,
A pressurizable high temperature type fuel cell unit cell assembly.
The method according to claim 1,
The cell box includes:
A buffer bellows for buffering expansion and contraction generated during an operation process and buffering deformation of the cell box,
A pressurizable high temperature type fuel cell unit cell assembly.
The method according to claim 1,
The cell box includes:
And an electrolyte supplement between the cathode side and the side surface of the cathode cathode plate,
In order to ensure the operation performance and long-term operation stability,
A pressurizable high temperature type fuel cell unit cell assembly.

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