KR101105050B1 - Fuel cell stack - Google Patents

Abstract

The present invention relates to an integrated fuel cell stack.
The fuel cell stack according to the present invention is formed at the center of a thin metal body having four vertices and is formed between a reaction gas channel protruding from a first surface to a second surface and the reaction gas channel protruding from the second surface. A channel portion formed of a coolant channel formed in the channel portion, a manifold portion formed on both sides of the channel portion, and a gasket formed at a portion requiring an edge and sealing of the metal body including an outer portion of the manifold portion, The gasket of the region adjacent to the vertex portion is rounded so that the electrode terminal portion of the stack voltage detecting device is coupled to any one of the four vertex portions of the metal body, and a triangular electrode terminal is coupled to the region between the vertex and the gasket. A fuel cell metal separator plate provided with an area; And a membrane-electrode assembly (MEA) disposed between the metal separator plates for the fuel cell.

Description

Fuel Cell Stack {FUEL CELL STACK}

The present invention relates to a fuel cell stack, and more particularly, to a technique for easily coupling and monitoring a voltage detection device to a fuel cell stack.

A fuel cell is a device that produces electricity electrochemically using hydrogen gas and oxygen gas. The fuel cell converts fuel (hydrogen) and air (oxygen) continuously supplied from the outside into electrical energy and thermal energy by an electrochemical reaction. Device.

Such a fuel cell generates electric power using an oxidation reaction at an anode and a reduction reaction at a cathode. At this time, a membrane-electrode assembly (MEA) composed of a catalyst layer and a polymer electrolyte membrane containing platinum or platinum-ruthenium metal, etc. is used to promote the oxidation and reduction reactions. The separator is fastened to form a cell structure.

The cell structure is stacked to form a fuel cell stack. The fuel cell is currently researched and used for various purposes as an alternative energy source, and is typically a polymer electrolyte membrane fuel cell. Fuel Cell; PEMFC). Polymer electrolyte membrane fuel cells have various advantages such as high output density, high energy conversion efficiency, and miniaturization and sealing.

Therefore, it is used as alternative energy in various fields such as pollution-free automobiles, household power generation systems, mobile communication equipment, military equipment, and medical equipment.

On the other hand, in general, in order to manufacture a stack used in a fuel cell vehicle, a plurality of cells must be stacked, and the stacked plurality of cell voltages must be measured at all times so as to prevent degradation of stack performance, such as reversal or short circuit, during operation. do.

In other words, the evaluation of the fuel cell stack is performed by measuring current and voltage generated in the fuel cell stack. In particular, the voltage measurement of each cell becomes an important data indicating the performance and characteristics of each cell during stack operation. .

Therefore, in order to operate the fuel cell stack stably in an optimal state and to stop operation due to sudden decrease in performance, it is necessary to accurately monitor the voltage of each cell, thereby requiring the accuracy of the cell voltage measuring device.

Conventionally, in order to detect the plurality of cell voltages, a method of soldering wires and pins by the number of separator plates in a stack and fixing the wires and pins to a support has been used.

However, if the voltage of the stack cell is detected by the above method, the pin may fall out due to the shaking of the stack. There was a possibility that the wires shorted as the stack temperature increased.

Therefore, a method of manufacturing the pin in the form of a terminal and fixing the separator to the separator was used.

1 is a schematic diagram showing a stack voltage detection apparatus according to the prior art.

Referring to FIG. 1, as a main configuration, a membrane-electrode assembly (MEA; Membrane Electrode Assembly) (101, MEA), which is an assembly of an electrode that causes an electrochemical reaction and an electrolyte membrane that transfers hydrogen ions generated by the electrochemical reaction, is supported. It consists of a separator plate (103).

Among fuel cells having such a structure, in particular, fuel cell vehicles, individual unit cells CELL are stacked as needed to obtain higher power and used as a fuel cell stack 100.

The fuel cell stack 100 includes two end plates 113 and 115 that support both ends of the plurality of stacked separator plates 103 by a fastening rod 117, and the separator plate 103. A gas diffusion layer (GDL) may be disposed between the membrane and the electrode assembly 101 (MEA) for efficient gas exchange.

In the fuel cell stack 100 having the structure as described above, current generated by the mutual chemical reaction flows through the separator plate 103 of the conductor, and is extracted through the electrode at the end of the separator plate 103. In addition, the generated water may be partially used to discharge to the outside or to cause a chemical reaction. In this case, a fuel cell flowing as much current as possible becomes more efficient.

Conventional cell voltage measuring apparatus for measuring the cell voltage of the fuel cell stack, as shown in FIG. 1, by forming a protrusion on the side of the separator plate 103 of the fuel cell stack 100, the protrusion of the socket type Wires 109 are formed to fix the electrode terminal 130 and connect the respective separators 103 inserted into the electrode terminal 130 with the connector 107. At this time, the electrode terminal 130 may be formed in a form that can be fitted at the same time the entire separation plate 103, or may be formed in a divided form that can be divided into a predetermined number of groups.

However, the electrode terminal 111 of the socket type as described above has the inconvenience of considering the formation of a separate protrusion when manufacturing the metal separator plate, there is a problem that the shape of the separator plate is complicated due to the shape of the protrusion.

2 is a schematic diagram illustrating a coupling relationship between a socket type electrode terminal and a separator according to the related art.

Referring to FIG. 2, five metal separators 110 are formed, and protrusions 120 to which the electrode terminals 130 can be fitted are formed on the side surfaces of each separator. In this case, a slit 140 corresponding to the protrusion 120 is formed on an inner surface of the electrode terminal 130, and a metal separation plate 110 inserted into the slit 140 on a surface opposite to the surface on which the slit 140 is formed. Electrical wires 109 are formed that are electrically connected and lead to the connector 107 of FIG. 1.

Here, the protrusions 120 must be uniformly formed to be easily fitted into the slits 140, and the metal separators 110 must be formed on all the slits 140 formed on the electrode terminals 130 until the alignment is made correctly. Can be fitted.

Since this process is a very complicated and difficult task, the workability is very bad, and when detached and detached by repeated experiments, the protrusion may be damaged. In addition, since the size of the protrusion is limited, when the contact area is insufficient, it may not be possible to measure the correct cell voltage.

In addition, as illustrated in FIG. 1, the electrode terminal 130 is connected to the connector 107 by a wire 109 formed through the end plate 113. In this case, as well as the wires must be arranged individually, there is an inconvenience to separate the wires from each separation plate to match the connector 107.

Due to the above problems, the performance of each cell of the fuel cell stack cannot be accurately measured, and if the performance of each cell suddenly decreases due to a shortage or shortage of supply gas, the fuel cell stack is monitored and monitored. Problems may arise, such as failing to take prompt action, leading to deterioration of the fuel cell stack.

According to the present invention, by using a socket-type electrode terminal disposed at a corner of a fuel cell stack, a separate projecting part can be avoided, thereby improving separation plate manufacturing and alignment efficiency, and easily detachable at any corner. This enables the measurement of accurate characteristics according to the characteristics of each cell, freely adjusting the contact area, and including a printed circuit board unit including various elements for performing detection and a display unit capable of displaying results. It is an object of the present invention to provide an integrated fuel cell stack in which the performance of each cell is easily monitored and a quick action on the fuel cell stack is taken when a problem occurs.

The fuel cell stack according to the present invention is formed at the center of a thin metal body having four vertices and is formed between a reaction gas channel protruding from a first surface to a second surface and the reaction gas channel protruding from the second surface. A channel portion formed of a coolant channel formed in the channel portion, a manifold portion formed on both sides of the channel portion, and a gasket formed at a portion requiring an edge and sealing of the metal body including an outer portion of the manifold portion, The gasket of the region adjacent to the vertex portion is rounded so that the electrode terminal portion of the stack voltage detecting device is coupled to any one of the four vertex portions of the metal body, and a triangular electrode terminal coupling is formed between the vertex portion and the gasket. Fuel cell metal separator plate and fuel cell metal separator plate It characterized in that it comprises a membrane-electrode assembly (MEA) is arranged.

The method may further include a buffer layer on the sidewall of the fuel cell stack for insulating and protecting the metal separator, wherein the electrode terminal coupling region is marked or marked by plating. The metal separation plate sidewall of the electrode terminal coupling region is characterized in that the coupling groove for coupling with the electrode terminal portion is further formed, the coupling groove is characterized in that formed in a semi-circular or polygonal shape, At least one sidewall of each metal separator plate of the electrode terminal coupling region may be formed or continuously formed to have a sawtooth shape.

The stack voltage detection apparatus of a fuel cell according to the present invention uses a socket-type electrode terminal disposed at an edge of a fuel cell stack, so that a separate protrusion is not formed on the separator plate, so that the cost of manufacturing the separator plate can be lowered. To provide the effect.

In addition, the fuel cell stack including the stack voltage detecting apparatus according to the present invention does not need to align the protrusions for the terminal coupling when the separator is aligned, so that only the vertices of the metal separator are aligned. Alignment efficiency can be improved. In addition, the terminals are coupled in the form of molding the corners of the stack, providing a structure that can be monitored while protecting the outer surface of the stack, thereby improving the appearance of the fuel cell stack and improving the robustness of the stack. To provide.

In addition, since any edge of the stack can be easily attached and detached, it is possible to measure accurate characteristics according to the characteristics of each cell, and the contact area of the terminal can be freely adjusted to easily monitor and troubleshoot the performance of each cell. It provides the effect of taking prompt action on the cell stack when it occurs.

1 is a schematic diagram showing a stack voltage detection apparatus according to the prior art.
2 is a schematic diagram showing a coupling relationship between a socket-type electrode terminal and a separator according to the prior art;
3 is a schematic diagram showing a coupling relationship between a socket type electrode terminal and a metal separator plate according to the present invention;
4 and 5 are schematic views showing embodiments of a fuel cell stack voltage detection apparatus according to the present invention.
Figure 6 is a schematic diagram showing a stack voltage detection device and a fuel cell stack including the same of the integrated fuel cell according to the present invention.
7 to 9 are plan views illustrating a coupling relationship between a metal separator and an electrode terminal constituting a fuel cell stack according to the present invention.

Hereinafter, a stack voltage detecting apparatus for an integrated fuel cell and a fuel cell stack including the same according to the present invention will be described in detail.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent with reference to the embodiments and drawings described in detail below. However, it is to be understood that the present invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It is intended that the disclosure of the present invention be limited only by the terms of the appended claims.

That is, the following detailed description of the present invention will be described using a polymer electrolyte fuel cell (PEMFC) as an example.

However, this is for convenience of explanation and understanding, and the technical spirit of the present invention should not be understood as necessarily limited to the polymer fuel cell. In particular, as a fuel cell using a polymer membrane as an electrolyte, terms such as SPEFC (Solid Polymer Electrolyte Fuel Cell), SPFC (Solid Polymer Fuel Cell), PEFC (Polymer Electrolyte Fuel Cell) and PEMFC (Proton-Exchange Membrane Fuel Cell) As it is used, it is to be understood that the present invention generally applies to the field of fuel cells, including metal separators and current collectors.

3 is a schematic diagram illustrating a coupling relationship between a socket type electrode terminal and a metal separator according to the present invention.

Referring to FIG. 3, it can be seen that the metal separation plate 210 and the electrode terminal 230 are formed.

Here, if the first look at the metal separating plate 210, it can be seen that no protrusion is formed in the center of the metal separating plate 210. As such, in the present invention, it is possible to maintain the original shape of the metal separating plate 210 without using a protrusion that wastes material and causes unnecessary problems by a separate process, thereby improving manufacturing efficiency of the metal separating plate and When connecting the voltage detection device, the socket type electrode terminal can be easily connected.

In order to couple the electrode terminal 230 without modifying the shape of the metal separator 210 as described above, it is preferable to couple to the vertex portion of the metal separator 210. To this end, one of the four vertices of the metal separation plate 210 is provided with an electrode terminal coupling region 215 on one side, and mark or mark using ink or paint, or performing a plating process to the electrode terminal coupling region 215 The identification of can be made easy. In this case, the conductive material may be included in the ink or the paint to be coated on the entire surface of the electrode terminal coupling region 215, and only the boundary part may be displayed using only a general material. In addition, by performing a plating process using a metal material having good conductivity, voltage detection may be more easily performed when the electrode terminal 230 is coupled.

Here, as described above, the mark display or the plated display may be displayed in various forms, and these matters are additional, and thus, the mark display or the plating display may not be necessarily formed on the metal separator 210. It is not limited.

Next, referring to the electrode terminal 230, a terminal hole 250 having a slit shape in which a vertex portion of the metal separator 210 is inserted is formed therein, and the outside of the terminal hole 250 may be protected. An outer cover is formed. At this time, the outer cover form is shown in the form of a triangular prism, but is not necessarily limited thereto. In addition, it is preferable that the material of the outer cover is formed of a general polymer material, but any material having insulation and robustness can be used without limitation.

Here, the terminal holes 250 are disposed at intervals corresponding to the intervals of the metal separator 210 disposed in the fuel cell stack, and the line widths thereof are formed to be 10 to 20% thicker than the metal separator 210. It is preferable. In addition, the cross-sectional shape of the terminal hole 250 with respect to the surface parallel to the metal separator 210 may be formed in a shape corresponding to the shape of the vertex of the metal separator 210. This is because the tightness of the coupling can be improved only by exactly matching the shape of the vertex.

In addition, the terminal hole 250 includes a metal terminal for electrically connecting the metal separator 210 and the voltage detection device, and the terminals include a printed circuit board unit (not shown) and a display for voltage detection and monitoring. Directly connected to the part (not shown).

In this case, there may be a difference in the manner in which the voltage detection device and the printed circuit board unit or the display unit are connected.

4 and 5 are schematic views showing embodiments of the fuel cell stack voltage detection apparatus according to the present invention.

4 illustrates a case in which the socket-type electrode terminal portion is formed to surround the entire edge of the stack, and FIG. 5 illustrates the socket-type electrode terminal portion coupled to the edge portion of the stack in a divided form.

First, referring to FIG. 4, a membrane-electrode assembly 220A is formed in a region between the fuel cell metal separators 210A as a main configuration of the fuel cell stack 200A. At this time, the metal separator 210A is formed in a thin thin like a real paper, and two sheets may be bonded to each other, but in this drawing, one thick layer is shown.

Next, a gas diffusion layer (not shown) may be further formed in the region between the membrane-electrode assembly 220A and the metal separator 210A, but is not illustrated here.

The reaction gas is injected into the fuel cell stack 200A having the above structure to generate a voltage. In order to maintain the shape of the fuel cell stack 200A, end plates 230A and 235A are formed at both sides of the stack. The end plates 230A and 235A are formed in a structure capable of compressing the stack by the fastening rods 240A.

The electrode terminal part 250A of the embodiment as described above is formed in a form surrounding the whole one side edge portion of the stack 200A in which the metal separation plate 210A is stacked. Thus, it can be seen that the shape of the stack 200A is shown concisely. As such, the stack 200A may be integrated into the stack 200A without wasteful space, and may be more firmly coupled to the stack 200A, and the coupling of the printed circuit board and the display unit may be facilitated as shown in FIG. 6. have.

Next, in another embodiment according to the present invention, the stack voltage detecting device may be formed at both corner portions appearing at the top surface of the stack instead of at only one corner portion, or at all four corner portions of the stack. In this case, the robustness of the stack can be further improved by that amount.

In this case, the stack may be divided into two parts and the electrode terminal parts formed on both sides of each divided area may be connected to each other. In this way, when the segmentation detection is performed, the detection process can be performed more quickly, and the problem can be found more quickly.

On the other hand, the electrode terminal portion of the shape surrounding the entire corner portion also serves as a molding portion to reinforce the appearance of the stack, it may play a role to be performed by dividing the detection and monitoring.

Next, referring to FIG. 5, it can be seen that the electrode terminal parts 250B and 255B are formed in a divided form. This is to combine the metal separating plate 210B by a predetermined group to form the electrode terminal portion (250B, 255B) for each group. In addition, other reference numerals follow the description of the following reference numerals.

In the illustrated form, although the electrode terminal portions 250B and 255B for each neighboring group are arranged in a staggered form, they are not limited thereto. It may be formed between the corners symmetrical to each other, or may be formed utilizing all four corners.

In this case, although the role as a molding part for reinforcing the structure of the fuel cell stack 200B is reduced than in the case of being integrally formed as shown in FIG. 4, the metal separator 210B is further subdivided, thereby providing more sophisticated voltage detection and Monitoring is possible. In addition, the coupling of the printed circuit board unit and the display unit of various forms may be facilitated.

In addition, the problem occurrence area can be further divided and detected, and the positions of the electrode terminal parts 250B and 255B can be freely changed according to the environment in which the fuel cell stack 200B is installed, thereby providing a wider range of applications.

As described above, the stack voltage detection apparatus of the fuel cell according to the present invention may be formed in various embodiments according to the shape of the socket type electrode terminal portion coupled to the corner portion.

Here, the printed circuit board unit and the display unit may be formed on the surface formed by the fuel cell stack, respectively, which will be described in detail with reference to FIG. 6.

As described above, the shape of the socket-type electrode terminal portion used in the stack voltage detection device of the integrated fuel cell according to the present invention and the metal separation plate capable of accommodating the same are as described above. And the examples are to be examined.

6 is a schematic diagram illustrating a stack voltage detection apparatus of an integrated fuel cell and a fuel cell stack including the same according to the present invention.

Referring to FIG. 6, the main components of the fuel cell stack 300 include a metal separator plate for fuel cells and a membrane-electrode assembly formed in a region therebetween. The specific form is as shown in FIG. 1, but it is briefly illustrated as only one block form and is represented by a metal separator 310.

Next, a gas diffusion layer (not shown) may be further formed in the region between the metal separators 310, but is not illustrated here. In addition, in order to maintain the shape of the fuel cell stack 300, end plates (not shown) are formed on both sides of the stack, and the end plates are formed in a structure capable of compressing the stack by a fastening rod (not shown). Since this structure also follows the form shown in FIG. 1, it will be omitted here.

Next, as an important feature of the present invention, the electrode terminal portion 350 according to the present invention is formed in a form surrounding the entire one side edge portion of the stack 300 formed by stacking the metal separator 310.

As such, when the electrode terminal portion 350 is coupled to the corner portion, it can be seen that the shape of the stack 300 is first concise. It can be combined in an integrated form in the stack 300 without wasting unnecessary space, and thus can be combined more firmly than before.

In addition, by further forming the printed circuit board unit 360 and the display unit 370 as shown above the surfaces formed by the stack 300, a device for detecting the voltage of the fuel cell is formed integrally with the fuel cell stack. can do.

Here, the printed circuit board unit 360 includes various circuit elements for performing voltage detection and monitoring in-situ. If the stack is large, all the elements may be included in the printed circuit board unit 360. Otherwise, the elements may be connected to the external monitoring device by the auxiliary interface terminal 380 and the connector 390. In addition, the printed circuit board unit 360 according to the present invention may further include circuit elements capable of communicating with an external monitoring device in a wireless manner.

The printed circuit board 360 may be directly connected by the electrode terminal 350 formed at the edge of the stack and the first solder or the first wire 365, and the metal is separated from the printed circuit board 360. In the region between the plates 310, a buffer layer (not shown) for insulation and buffering may be further formed.

Next, the display unit 370 is formed to surround one surface of the fuel cell stack 300 and is integrally formed with the electrode terminal unit 350 according to the present invention. The display unit 370 is formed of an LED display panel or an LCD panel, and can display various data detected by the printed circuit board 360 in real time, and can quickly display various graph information or error code information. .

Like the printed circuit board 360, the display unit 370 may also be directly connected by the electrode terminal unit 350 and the second solder or the second wire 375, and the metal separator 310 and the display unit 370 may be directly connected to each other. A buffer layer may be further formed therebetween.

In addition, the surface of the stack 300 on which the printed circuit board unit 360 and the display unit 370 are formed is not limited, and any form may be used as long as it is connected to the electrode terminal unit 350 integrally.

Therefore, the electrode terminal 350 according to the present invention is formed not only at one corner but also at both corners of the upper surface of the stack 300, that is, in the form of holding both sides of the printed circuit board 360. Can be. In addition, it can be applied to the display unit 370 in the same form, in this case it is possible to further improve the robustness of the stack 300.

In this case, the metal separators 310 included in the stack 300 may be divided and connected to one of the electrode terminal units 350 formed at both sides of each of the divided regions.

As a result, the detection process can be performed more quickly, and when a problem occurs, it is possible to find a problem part more quickly. As such, the electrode terminal part 350 covering the entire corner part also serves as a molding part to reinforce the appearance of the stack 300, and may serve to divide and perform detection and monitoring. Therefore, the same electrode terminal portion 350 may be formed on all four corners of the stack 300.

In addition, the electrode terminal unit 350 may be divided and used, and by further subdividing the metal separator 310, more sophisticated voltage detection and monitoring may be performed. In addition, the problem occurrence area can be detected more finely, and the position of the electrode terminal part 350 can be freely changed according to the environment in which the stack 300 is installed, thereby providing a wider range of applications.

As described above, the stack voltage detection apparatus of the fuel cell according to the present invention may be formed in various embodiments according to the shape of the socket type electrode terminal portion coupled to the corner portion.

In addition, the socket-type electrode terminal unit according to the present invention can be used in various embodiments depending on the shape of the metal separator constituting the stack, looking at the fuel cell stack of the present invention including such a configuration as follows.

7 to 9 are plan views illustrating a coupling relationship between a metal separator and an electrode terminal constituting a fuel cell stack according to the present invention.

FIG. 7 illustrates only a part of the metal separator constituting the fuel cell stack according to the present invention. First, a metal body 510 having a rectangular thin plate shape having four vertices is formed.

Next, at the center of the metal body 510, a channel part 520 including a reaction gas channel protruding from the first surface to the second surface and a coolant channel formed between the reaction gas channel protruding from the second surface is provided. Is formed. Here, when the surface shown on the front is called the first surface, the reaction gas flows in the illustrated surface, and when the illustrated surface is the second surface, the coolant flows in the illustrated surface.

Next, manifold portions 530, 535, and 540 are formed on both side surfaces of the channel portion 520. Here, one side manifold portion is omitted, and the manifold portion is divided into a manifold 530 through which air circulates, a manifold 535 through which cooling water circulates, and a manifold 540 through which hydrogen is circulated, and in the order described above. It can be arranged freely without limitation.

Next, a gasket 560 is formed on the outer circumference of the manifold portions 530, 535, and 540 and the edge of the metal body 510, and other portions that require sealing. At this time, the gasket 560 adjacent to the four vertices of the metal body 510 is rounded to ensure a space to which the electrode terminal of the present invention can be coupled as described above.

In this case, the contact area may be adjusted in proportion to the radius of curvature R1 of the rounded gasket 560. Thus, as shown in the drawing, the coupling area of the terminal hole 550 included in the electrode terminal part may be displayed.

In the case of FIG. 8, the radius of curvature R2 of the gasket 660 is greater than that of FIG. 7. In this case, it can be seen that the area in which the terminal holes 650 are coupled increases significantly.

As such, according to the present invention, the coupling area of the socket-type electrode terminal portion coupled to the vertex portion of the metal separator plate, that is, the corner portion of the stack formed by stacking the metal separator plate, can be freely adjusted according to the curvature radius of the gasket 660. It is possible.

In this case, the electrode terminal coupling region controlled by the radius of curvature of the gasket 660 may be processed in various forms such as a mark display and a fastening groove as described in FIG. 2.

In the case of FIG. 9, a fastening groove is formed in the electrode terminal coupling region.

Fastening grooves 715a and 715b are further formed on sidewalls of the metal main body 710 of the electrode terminal coupling region 715 for tight coupling with the electrode terminal portion.

Here, the fastening grooves 715a and 715b may be formed in various shapes such as semicircles or polygons. In addition, one or more fastening grooves 715a and 715b may be formed on the sidewalls of each of the metal separation plates of the electrode terminal coupling region 715, and may be continuously formed to have a sawtooth shape.

In this case, the guide protrusions 755a and 755b are further formed in the terminal holes 750 formed inside the electrode terminal parts so as to correspond to the fastening grooves 715a and 715b. It can be made more robust.

As described above, the apparatus for detecting a stack voltage of a fuel cell according to the present invention uses an electrode terminal portion of a socket type, but does not use a fuel cell stack having the same protruding coupling portion as the conventional electrode, but can be coupled to an edge portion. By using the terminal portion and the metal separator plate, it is possible to form a voltage detection device that can be easily combined while simplifying the fuel cell stack manufacturing process. In particular, the socket-type electrode terminal portion according to the present invention can be utilized as a molding portion surrounding the edge of the stack, it can be used freely in a divided form.

In addition, as described above, by combining a device for performing voltage detection and monitoring, such as a printed circuit board unit and a display unit, as a stack, it is possible to quickly grasp information of each cell.

In such an integrated structure, since separate cables do not need to be provided, the fuel cell stack manufacturing process is facilitated, and failures and failure rates due to shorts or disconnections of the cables can be significantly reduced.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

210, 210A, 210B, 310: Metal Separator
215: electrode terminal coupling region
230: electrode terminal
250, 550, 650, 750: terminal hole
200A, 200B, 300: Stack
220A, 220B: Membrane-electrode assembly
230A, 235A, 230B, 235B: End Plate
240A, 240B: Fastening bar
250A, 250B, 255B, 350: electrode terminal portion
360: printed circuit board portion 365, 375: first and second wire
370: display unit 380: interface terminal
390: connectors 510, 610, 710: metal body
520: channel portion 530: manifold through which air is circulated
535: manifold circulating cooling water 540: manifold circulating hydrogen
560, 660: gasket 715: electrode terminal coupling region
715a, 715b: fastening groove 755a, 755b: guide protrusion

Claims (6)

A channel consisting of a reaction gas channel formed at a center of a thin metal body having four vertices and protruding from a first surface to a second surface, and a cooling water channel formed between the reaction gas channel protruding from the second surface. And a gasket formed on a portion of the metal body including a manifold portion formed on both side surfaces of the channel portion, and a portion requiring an edge and sealing of the metal body including an outer portion of the manifold portion. The gasket of the region adjacent to the vertex portion is rounded so that any one of the electrode terminal portion of the stack voltage detection device is coupled, so that a triangular electrode terminal coupling region is provided in the region between the vertex and the gasket. Separators; And
And a membrane-electrode assembly (MEA) disposed between the metal separator plates for the fuel cell.
The method of claim 1,
And a buffer layer on the sidewall of the fuel cell stack for insulating and protecting the metal separator.
The method of claim 1,
The electrode terminal coupling region is marked or marked by plating.
The method of claim 1,
And a fastening groove for coupling with the electrode terminal part is further formed on the sidewall of the metal separation plate of the electrode terminal coupling region.
The method of claim 4, wherein
The fastening groove is a fuel cell stack, characterized in that formed in a semi-circular or polygonal shape.
The method of claim 4, wherein
The fastening groove is formed on at least one side wall of each metal separation plate of the electrode terminal coupling region, or a fuel cell stack, characterized in that continuously formed so as to be sawtooth-shaped.

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