KR20230131093A - Fuel cell stack assembly in which the contact area of the polymeric ion exchange membrane of the seperator is maintained - Google Patents

Abstract

The present invention relates to a fuel cell stack assembly. According to the present invention, a stack (stack); Electrode plates respectively attached to the front and back sides of the stack to transmit current; an electrode lead connected to the electrode plate and exposed to the outside; a first frame portion installed on the rear side of the stack and in contact with an outer surface of the electrode plate; A second frame part installed on the front side of the stack and in contact with the outer surface of the electrode plate and provided with a spring to press the stack, and a third frame part to fix the spacing between the first and second frame parts. A fuel cell stack assembly can be provided.

Description

Fuel cell stack assembly in which the contact area of the polymer ion exchange membrane of the separator is maintained {FUEL CELL STACK ASSEMBLY IN WHICH THE CONTACT AREA OF THE POLYMERIC ION EXCHANGE MEMBRANE OF THE SEPERATOR IS MAINTAINED}

The present invention relates to a fuel cell stack assembly in which the contact area of the polymer ion exchange membrane of the separator is maintained. More specifically, it relates to a fuel cell stack assembly that can increase the durability of the stack by continuously maintaining the assembly pressure using a plurality of springs. , relates to a fuel cell stack assembly in which the contact area of the polymer ion exchange membrane of the separator is maintained.

A fuel cell is a device that generates electrical energy by electrochemically reacting fuel and an oxidant. This chemical reaction is carried out by a catalyst within a catalyst layer, and generally, continuous power generation is possible as long as fuel is continuously supplied.

In addition, fuel cells can be classified into alkaline type (AFC), polymer electrolyte type (PEMFC), phosphoric acid type (PAFC), molten carbonate (MCFC), and solid oxide (SOFC) fuel cells depending on the type of electrolyte and operating temperature. , Polymer electrolyte fuel cells can be further divided into fuel cells using hydrogen as fuel and direct methanol fuel cells (DMFC) using methanol liquid as fuel.

Among these, the polymer electrolyte fuel cell has a porous anode and an air electrode attached on both sides centered on a polymer electrolyte membrane. The anode conducts electrical oxidation of hydrogen, which is the fuel, and the air electrode produces oxygen, which is an oxidizing agent. Electrochemical reduction occurs and electrical energy is generated.

Recently, there have been efforts to improve energy yield by effectively stacking polymer electrolyte membranes.

At this time, a separator is inserted between the polymer electrolyte membranes to supply the reaction gas to each polymer electrolyte membrane. If gas tightness between the polymer electrolyte membranes and the separator is not secured, the fuel leaks to the outside, reducing the energy yield. There is a problem that the efficiency of the fuel cell decreases due to low fuel consumption, waste of fuel, and increased contact resistance.

(Republic of Korea) Registered Patent Publication No. 10-0627285

In order to solve the above problem, the present invention utilizes a plurality of springs to continuously maintain the assembly pressure, thereby maintaining the contact area of the polymer ion exchange membrane of the separator plate and continuously maintaining the fluid leakage prevention performance of the gasket. The purpose is to provide a fuel cell stack assembly in which the contact area of the polymer ion exchange membrane of the separator is maintained, which can increase the durability of the stack by maintaining it.

A fuel cell stack assembly in which the contact area of the polymer ion exchange membrane of the separator according to one aspect of the present invention is maintained includes a stack, electrode plates respectively attached to the front and back of the stack to transmit current, and connected to the electrode plate. an electrode lead exposed to the outside, a first frame portion installed on the rear side of the stack to be in contact with the outer surface of the electrode plate, and installed on the front side of the stack to be in contact with the outer surface of the electrode plate, and provided with a spring. It includes a second frame part that presses the stack and a third frame part that fixes a distance between the first and second frame parts, wherein the stack includes a pair of through holes and a plurality of stacked battery cells, A pair of jig plates formed in a plate shape and disposed on both sides before and after the battery cell, including a stacking groove formed on one side to seat the battery cell and a rod hole formed at a position corresponding to the through hole, penetrating through the through hole. and a support rod inserted into the rod hole and installed on the jig plate, and the stack further includes an alignment auxiliary portion installed between the pair of jig plates to align the plurality of battery cells, and the alignment auxiliary portion , is formed to penetrate the jig plate from the front and back, and is installed in the moving hole formed to have a length along each circumferential surface and the moving hole of the pair of jig plates, and is in contact with the battery cell and follows the moving hole. It includes an alignment unit that moves to align a plurality of battery cells, wherein the alignment unit includes a moving bar that is inserted into the moving hole and moves along the moving hole, an alignment plate that aligns in contact with the battery cells, and a space between the moving bar and the alignment plate. It is formed in and includes an elastic member that provides elasticity to the alignment plate.

The fuel cell stack assembly in which the contact area of the polymer ion exchange membrane of the separator plate according to the embodiment of the present invention is maintained as described above utilizes a plurality of springs to continuously maintain the assembly pressure of fuel cells such as PEMFC, thereby separating The contact area of the plate's polymer ion exchange membrane can be maintained and the fluid leak prevention performance of the end plate can be continuously maintained.

Accordingly, the durability of the stack can be increased, and power production can be maintained for a long time to ensure output stability.

1 is a perspective view showing a fuel cell stack assembly according to a first embodiment of the present invention.
FIG. 2 is an exploded perspective view showing the fuel cell stack assembly of FIG. 1.
Figure 3 is an exploded rear perspective view showing the fuel cell stack assembly of Figure 1.
FIG. 4 is a side cross-sectional view showing the fuel cell stack assembly of FIG. 1.
FIG. 5A is a projected perspective view showing the second frame of the fuel cell stack assembly of FIG. 1 before being coupled to the third frame portion.
FIG. 5B is a projected perspective view showing the second frame of the fuel cell stack assembly of FIG. 1 coupled to the third frame portion through bolts.
Figure 6 is a perspective view showing the stack of Figure 1;
Figure 7 is an exploded perspective view showing the stack of Figure 6;
Figure 8 is a front view showing the jig plate of Figure 7.
Figure 9 is a rear perspective view showing an auxiliary member installed in the stack of the fuel cell stack assembly according to the first embodiment of the present invention.
FIGS. 10A to 10C are exemplary diagrams sequentially showing the installation of the auxiliary members of FIG. 9.
Figure 11 is a perspective view showing an alignment auxiliary part formed in the stack of the fuel cell stack assembly according to the first embodiment of the present invention.
Figure 12 is a side view of Figure 11.
Figure 13a is a projected perspective view showing the second frame of the fuel cell stack assembly according to the second embodiment of the present invention before being coupled to the third frame portion.
Figure 13b is a projection perspective view showing the second frame of the fuel cell stack assembly according to the second embodiment of the present invention coupled to the third frame portion by a coupling protrusion.

Hereinafter, the description of the present invention with reference to the drawings is not limited to specific embodiments, and various changes may be made and various embodiments may be possible. In addition, the content described below should be understood to include all conversions, equivalents, and substitutes included in the spirit and technical scope of the present invention.

In the following description, the terms first, second, etc. are terms used to describe various components, and their meaning is not limited, and is used only for the purpose of distinguishing one component from other components.

Like reference numerals used throughout this specification refer to like elements.

As used herein, singular expressions include plural expressions, unless the context clearly dictates otherwise. In addition, terms such as “comprise,” “provide,” or “have” used below are intended to designate the presence of features, numbers, steps, operations, components, parts, or a combination thereof described in the specification. It should be construed and understood as not excluding in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying FIGS. 1 to 13B.

FIG. 1 is a perspective view showing a fuel cell stack assembly according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view showing the fuel cell stack assembly of FIG. 1, and FIG. 3 is a fuel cell stack assembly of FIG. 1. It is an separated rear perspective view, FIG. 4 is a side cross-sectional view showing the fuel cell stack assembly of FIG. 1, and FIG. 5A shows the second frame of the fuel cell stack assembly of FIG. 1 before being coupled to the third frame portion. It is a projection perspective view, and FIG. 5B is a projection perspective view showing the second frame of the fuel cell stack assembly of FIG. 1 coupled to the third frame portion through bolts.

1 to 4, the fuel cell stack assembly 1 according to the first embodiment of the present invention includes a stack 10, electrode plates 20a and 20b, electrode leads 30a and 30b, and It may include a first frame part 40, a second frame part 50, and a third frame part 60.

Here, the fuel cell is a polymer electrolyte membrane fuel cell (PEMFC), which is a low-temperature fuel cell with an average operating temperature of 80°C. It basically operates on oxygen and hydrogen, and uses a hydrogen-rich reformed gas containing dioxide and It can also be operated using oxygen in the air. It is not limited to this.

The stack 10 that produces electricity will be described in more detail below.

The electrode plates 20a and 20b are formed in a plate shape and are attached to the front and rear surfaces of the stack 10, respectively, so that electricity produced in the stack 10 can be transmitted to the load through the electrode leads 30a and 30b.

The electrode plates 20a and 20b may be composed of an anode plate 20a and a cathode plate 20b, and the anode plate 20b may be attached to the front of the stack 10, and the anode plate 20a may be attached to the rear of the stack 10. It is not limited to this.

The electrode leads 30a and 30b extend from each electrode plate 20a and 20b and are exposed to the outside of the fuel cell stack assembly 1, thereby enabling connection to a load. The generated electricity can be delivered to the connected load.

The first frame portion 40 may be installed on the rear side of the stack 10 in contact with the outer surface of the electrode plates 20a and 20b, and may include a first frame 41 and a first end plate 42. You can.

The first frame 41 is formed in a plate shape and is coupled with the third frame portion 60, so that the separation distance from the first frame 41 can be fixed. This first frame 41 may be formed at the rear of the enclosure portion of the fuel cell stack assembly 1.

The first frame 41 may have at least one bolt groove formed along the circumference of the first frame 41 for coupling to the third frame portion 60 . However, the coupling method of the first frame 41 and the third frame portion 60 is not limited to bolt coupling, and the shape may be modified in various ways depending on the coupling method.

Additionally, the first frame 41 may further include a coupling hole for coupling to the first end plate 42.

The first end plate 42 is installed in contact with the electrode plates 20a and 20b attached to the rear of the stack 10 to block electricity generated from the stack 10 from flowing to places other than the electrode plates 20a and 20b. You can.

For this purpose, the first end plate 42 has an electrode groove formed on the inner surface, and as the electrode plates 20a and 20b are inserted into the electrode groove, the electrode plates 20a and 20b, excluding the surface in contact with the stack 10, are formed. By combining to surround the remaining portion, the airtightness of the first end plate 42 and the electrode plates 20a and 20b can be improved.

Additionally, the first end plate 42 may include a fastening protrusion that is inserted into and coupled to the fastening hole of the first frame 41.

The second frame portion 50 is installed on the front side of the stack 10 so as to contact the outer surfaces of the electrode plates 20a and 20b, and is provided with a spring 54 to pressurize the stack 10.

The second frame portion 50 can continuously maintain the assembly pressure of the fuel cell stack assembly 1 by pressing the stack 10 through the spring 54. Accordingly, the contact area of the polymer ion exchange membrane of the separator plate can be maintained and the fluid leak prevention performance of the first and second end plates 42 and 52 can be continuously maintained. Through this, the durability of the stack 10 can be increased, and power production can be maintained for a long time to ensure output stability.

Specifically, the second frame unit 50 may include a second frame 51, a second end plate 52, a pressure plate 53, and a spring 54.

The second frame 51 is formed in a plate shape, and as it is coupled with the third frame portion 60, the separation distance from the first frame 41 can be fixed. At this time, as the second frame 51 is coupled and fixed to the third frame portion 60, the spring 54 is compressed, so that the stack 10 is pressured by the spring 54.

This second frame 51 may be configured as the front of the enclosure portion of the fuel cell stack assembly 1.

Additionally, the second frame 51 may include a spring groove 510 and a bolt groove.

At least one spring groove 510 may be formed on the inner surface of the second frame 51, and a plurality of spring grooves 510 may be formed, but are not limited thereto.

In addition, when a plurality of spring grooves 510 are formed, they are formed symmetrically with respect to the center of the inner surface of the second frame 51, and as the spring 54 is installed in each spring groove 510, the spring pressure is applied to the pressing plate. It can be delivered evenly to the surface of (53).

At least one bolt groove may be formed along the circumference of the second frame 51 so that it can be fixed to the third frame part 60 by a bolt. However, the coupling method of the second frame 51 and the third frame portion 60 is not limited to bolt coupling, and the shape may be modified in various ways depending on the coupling method.

The second end plate 52 is installed to be in contact with the electrode plates 20a and 20b attached to the front of the stack 10 to block electricity generated from the stack 10 from flowing to places other than the electrode plates 20a and 20b. You can.

The second end plate 52 also has an electrode groove formed on its inner surface, so that when the electrode plates 20a and 20b are inserted into the electrode groove, the remainder of the electrode plates 20a and 20b except for the surface in contact with the stack 10. Can be combined to surround parts. Accordingly, the tightness of the joint between the second end plate 52 and the electrode plates 20a and 20b can be improved, and the electrical blocking function can be preferably achieved.

The pressing plate 53 is formed in a plate shape and is connected to a spring 54 on the outer surface, so that it can receive pressure from the spring 54 and pressurize the second end plate 52 that is located and contacted on the inner surface. . Accordingly, pressure is transmitted to the electrode plates 20a and 20b and the stack 10.

Additionally, the pressure plate 53 may include a spring groove 530.

At least one spring groove 530 of the pressure plate 53 may be formed on the outer surface of the pressure plate 53, and it may be desirable to form a plurality of spring grooves 530.

When a plurality of spring grooves 530 are formed, they are formed symmetrically with respect to the center of the outer surface of the pressure plate 53, so that the spring 54 can be inserted into each spring groove 530.

At least one spring 54 is installed between the second frame 51 and the pressure plate 53, and is compressed by the second frame 51 to apply pressure to the pressure plate 53. A plurality of springs 54 are provided. It may be more desirable to have it installed.

As shown in the drawing, it is preferable that a plurality of springs 54 are disposed on the entire inner surface area of the pressure plate 53 so as to evenly transmit pressure to the surface of the pressure plate 53.

In addition, the spring 54 is preferably fixed to the second frame 51 and in contact with the pressure plate 53, but is not fixed, but is not limited to this.

Pressure can be applied to the stack 10 through the second frame unit 50 configured in this way. As shown in FIGS. 5A and 5B, the second frame 51 is coupled to the third frame unit 60. In order to do so, the second frame 51 is pressed and coupled to the third frame portion 60 by the bolt V, so that the spring 54 is compressed to form the pressure plate 53 and the second end plate 52. The spring pressure is transmitted to, and ultimately, the electrode plates 20a and 20b and the stack 10 receive pressure, thereby improving durability.

The third frame part 60 can fix the spacing between the first frame part 40 and the second frame part 50, and is coupled to the first frame part 40 and the second frame part 50. It is composed of the top, bottom, left, and right sides of the outer case of the fuel cell stack assembly 1, and can protect the internal components of the fuel cell stack assembly 1, such as the stack 10.

This third frame portion 60 may include an upper and lower frame 61 and a side frame 62.

The upper and lower frames 61 can be coupled to the upper and lower sides of the first frame 41 and the second frame 51, respectively, and can be coupled to the first frame 41 and the second frame 51 by bolts. May include holes.

The side frame 62 can be coupled to the second frame 51 and the side of the second frame 51, and has a bolt hole so that it can be coupled to the first frame 41 and the second frame 51 by bolts. may include.

Meanwhile, the stack 10 will be described in detail using FIGS. 6 to 12.

FIG. 6 is a perspective view showing the stack of FIG. 1, FIG. 7 is an exploded perspective view showing the stack of FIG. 6, FIG. 8 is a front view showing the jig plate of FIG. 7, and FIG. 9 is a first view of the present invention. It is a rear perspective view showing an auxiliary member installed in the stack of a fuel cell stack assembly according to an embodiment, FIGS. 10A to 10C are exemplary views sequentially showing the installation of the auxiliary member of FIG. 9, and FIG. 11 is an example of the present invention. It is a perspective view showing the alignment auxiliary part formed in the stack of the fuel cell stack assembly according to the first embodiment, and FIG. 12 is a side view of FIG. 11.

The stack 10 is composed of a plurality of battery cells 11 connected in series and includes a battery cell 11, and a jig plate 12 and a support rod for aligning the plurality of battery cells 11 ( 13) may further be included.

Here, the battery cell 11 includes a positive plate, a coolant gasket, an MEA (Membrane-Electrode-Assembly), a separator plate, etc., and the MEA includes a gas diffusion layer (GDL), a catalyst layer, It can be composed of PEM (Proton Exchange Membrane), catalyst layer, and gas diffusion layer. Since this battery cell 11 is already a widely known technology, detailed description will be omitted.

In the present invention, the battery cell 11 is formed with a through hole 110 through which the support rod 13 can pass, so that a plurality of battery cells 11 are integrally connected by the support rod 13, forming a pair. It can be aligned between jig plates (12).

The jig plate 12 allows a plurality of battery cells 11 to be easily stacked in series, and can be formed as a pair. It is formed in the shape of a plate with a certain thickness, and has the battery cells 11 on one side. A stacking groove 126 capable of accommodating the battery cell 11 may be formed in a shape corresponding to the shape.

Additionally, the jig plate 12 may include a rod hole 120.

The rod hole 120 is formed symmetrically with respect to the center of the jig plate 12 so that the support rod 13 can be inserted. At this time, the rod hole 120 may be formed to be disposed in a diagonally symmetrical position with respect to the center of the jig plate 12, as shown in FIG. 8, but is not limited to this.

Meanwhile, the rod hole 120 of one of the pair of jig plates 12 will be replaced in the form of a groove, and only the rod hole 120 of the other jig plate 12 will be formed in the shape of a hole. This is to prevent the support rod 13 from penetrating the jig plate 12 and causing the stack 10 to be uncoupled.

Additionally, the jig plate 12 may further include an air inlet/outlet hole 121, a fuel in/out hole 122, and a coolant inlet/outlet hole 123. Since air, fuel, coolant, etc. are required to generate electricity in the battery cell 11, these can be said to be configurations formed to install air passages, fuel passages, and coolant passages that supply them.

The air inlet hole 121 is formed in the jig plate 12, and an air flow path for supplying air can be installed so that air can be supplied to the battery cell 11. The air inlet hole 121 may be composed of an air inlet hole and an air outlet hole.

The fuel entrance hole 122 is formed in the jig plate 12, and a fuel flow path for supplying fuel may be installed so that fuel (hydrogen) is supplied to the battery cell 11, and may be composed of a fuel inlet hole and a fuel discharge hole. You can.

The coolant inlet/outlet hole 123 may be formed in the jig plate 12 and may be installed with a coolant flow path for supplying coolant to the battery cell 11, and may be composed of a coolant inlet hole and a coolant discharge hole.

The support rod 13 is formed in the form of a thin rod and is inserted into the rod hole 120 of a pair of jig plates 12 to connect the pair of jig plates 12.

In addition, the support rod 13 allows the battery cells 11 to pass through and be stacked between a pair of jig plates 12, and can fix the position of the battery cells 11 so that a plurality of battery cells 11 are aligned. there is.

In addition, it is preferable that the length of the support rod 13 is equal to or shorter than the combined thickness of the jig plate 12 and the thickness of the plurality of battery cells 11 integrally connected, which means that the stack 10 is 2 This is to prevent the support rod 13 from coming into contact with the electrode plates 20a and 20b when pressed by the frame portion 50.

Referring to FIG. 9, the stack 10 may further include an auxiliary member 14, and the jig plate 12 may further include an auxiliary member installation hole 124 and an auxiliary member fixing groove 125.

For convenience of explanation of the auxiliary member 14, the auxiliary member installation hole 124 and the auxiliary member fixing groove 125 will be described first.

The auxiliary member installation hole 124 is formed to penetrate the jig plate 12 from the front and back, and may be formed to have a length along each peripheral surface. Accordingly, one auxiliary member 14 can be installed by passing through the auxiliary member installation hole 124 of the pair of jig plates 12.

Additionally, the auxiliary member installation hole 124 may include auxiliary member seating grooves 124a formed on the upper surface at regular intervals along the longitudinal direction. At this time, the auxiliary member seating groove 124a may be formed at a position corresponding to the auxiliary member fixing groove 125.

The auxiliary member fixing grooves 125 may be formed on each peripheral surface of the jig plate 12 at regular intervals along the longitudinal direction. In addition, since the auxiliary member fixing groove 125 is open to the outside, as shown in FIG. 9, the auxiliary member 14 bent through the auxiliary member installation hole 124 can be seated and fixed.

One or more auxiliary members 14 are installed between a pair of jig plates 12 to fix a pair of jig plates 12 with a plurality of battery cells 11 stacked therebetween, and the battery cells ( 11) It can exhibit a heat dissipation effect by contacting it.

For this purpose, the auxiliary member 14 may be formed of aluminum, etc., which is flexible and can exhibit a heat dissipation effect.

In addition, the auxiliary member 14 may include an auxiliary member body 140 formed in a bar shape and a member fixing part 141 formed at one end of the auxiliary member body 140 to prevent the auxiliary member from being removed from the installation hole 124. there is.

As shown in FIG. 9, the member fixing part 141 is formed larger than the auxiliary member installation hole 124 to prevent it from passing through the auxiliary member installation hole 124, so that the auxiliary member 14 can be inserted into the auxiliary member installation hole 124. When passing, the position of a group can be fixed by the member fixing part 141 without moving any further.

Referring to FIGS. 10A to 10C, the operation of the auxiliary member 14 will be described in detail.

First, Figure 10a is a state before the auxiliary member 14 is installed on the jig plate 12.

Figure 10b shows the auxiliary member body 140 inserted into the rear jig plate 12 from the rear to the front, and as shown in Figure 9, the member fixing part 141 does not pass through the auxiliary member installation hole 124 and is fixed. It can be.

Finally, as shown in Figure 10c, the flexible auxiliary member 14 passes through the auxiliary member installation hole 124 and then bends the other end upward in line with the jig plate 12 to settle in the auxiliary member fixing groove 125. It can be fixed according to . Accordingly, a pair of jig plates 12 can be connected and fixed.

At this time, the auxiliary member 14 is first seated in the auxiliary member seating groove 124a, and the auxiliary member 14 is bent and fixed in the auxiliary member fixing groove 125, thereby preventing the auxiliary member 14 from shaking and increasing the fixing force. It can be improved further.

By installing one or more auxiliary members 14 in this way, the coupling of the stack 10 can be improved and the battery cell 11 can be cooled effectively.

Referring to FIGS. 11 and 12 , the stack 10 may further include an alignment assistant 15.

The alignment auxiliary unit 15 is installed between a pair of jig plates 12 to align the plurality of battery cells 11.

Specifically, the alignment auxiliary unit 15 may include a moving hole 150 and an alignment unit 151.

The moving hole 150 is formed to penetrate the jig plate 12 from the front and back, and may be formed to have a length along each peripheral surface. Accordingly, the alignment unit 151 can move along the moving hole 150, thereby aligning the surfaces of the plurality of battery cells 11.

The alignment unit 151 is installed in the moving hole 150 of a pair of jig plates 12 and moves along the moving hole 150 while coming into contact with the battery cells 11 to align the plurality of battery cells 11. You can do it.

This alignment unit 151 may include a moving bar 151a, an alignment plate 151b, and an elastic member 151c.

The movable bar 151a is formed in a bar shape, and one end and the other end are respectively inserted into the symmetrical movable hole 150 in a pair of jig plates 12, so that it can move along the movable hole 150.

The alignment plate 151b is formed in a plate shape with a length in the forward-backward direction, and can be aligned in contact with the battery cell 11.

The elastic member 151c is formed between the moving bar 151a and the alignment plate 151b, and provides elasticity to the alignment plate 151b, allowing the alignment plate 151b to apply pressure to the battery cell.

The plurality of battery cells 11 can be aligned more neatly through the alignment auxiliary unit 15 configured in this way.

FIG. 13A is a projected perspective view showing the second frame of the fuel cell stack assembly according to the second embodiment of the present invention before being coupled to the third frame portion, and FIG. 13B is the fuel cell according to the second embodiment of the present invention. This is a projected perspective view showing the second frame of the stack assembly coupled to the third frame portion by a coupling protrusion.

13A and 13B, the second frame 51 of the fuel cell stack assembly 1 according to the second embodiment of the present invention includes a coupling protrusion 511, and the third frame portion 60 The upper and lower frames 61 and side frames 62 may include coupling holes 610 and 620.

Here, a coupling protrusion 511 is formed in place of the bolt groove of the second frame 51, and coupling holes 610 and 620 are formed in the upper and lower frames 61 and the side frames 62, respectively. The fuel cell stack assembly 1 according to the embodiment can be said to be substantially the same as the first embodiment of the present invention described above.

Therefore, only the coupling protrusion 511 and the coupling holes 610 and 620 will be described in detail.

The coupling protrusions 511 are formed to be spaced apart along the circumference of the second frame 51, and as the second frame 51 is pressed inward for coupling with the third frame part 60, the third frame part 60 ) can be inserted and fixed into the coupling holes (610,620).

It is preferable that at least one of these coupling protrusions 511 is formed on each side along the circumference of the second frame 51, and it may be preferable that they are formed to slope downward from the outer side to the inner side.

Accordingly, as shown in FIGS. 13A and 13B, the third frame portion 60 and the second frame 51 can be coupled simply by pressing the second frame 51, thereby improving assembly efficiency. .

The coupling holes 610 and 620 are formed in front of the upper and lower frames 61 and the side frames 62, into which the coupling protrusions 511 can be inserted.

As described above, the fuel cell stack assembly according to an embodiment of the present invention utilizes a plurality of springs to continuously maintain the assembly pressure of a fuel cell such as a PEMFC, thereby increasing the contact area of the polymer ion exchange membrane of the separator plate. It is possible to maintain the fluid leak prevention performance of the end plate continuously.

Accordingly, the durability of the stack can be increased, and power production can be maintained for a long time to ensure output stability.

In the above, the fuel cell stack assembly according to the embodiment of the present invention has been described by dividing it into the first and second embodiments, but this is explained by dividing the embodiments for convenience of explanation and ease of understanding, and the fuel cell stack assembly is limited to each embodiment. This is not the case, and the configurations of the embodiments can be applied to each other by changing the design.

Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art can realize that the present invention can be implemented in other specific forms without changing the technical idea or essential features of the present invention. You will be able to understand it. Therefore, the embodiments described above are illustrative in all respects and are not restrictive.

1: Fuel cell stack assembly
10: stack
11: battery cell
110: Through hole
12: Jig plate
120: Bonhol
121: Air entrance hole
122: Fuel access hole
123: Cooling water entry/exit hole
124: Auxiliary member installation hole
124a: Auxiliary member seating groove
125: Auxiliary member fixing groove
126: Laminated groove
13: support rod
14: Auxiliary member
140: Auxiliary member body
141: Member fixing unit
15: Alignment auxiliary unit
150: Mobile Hall
151: Alignment unit
151a: moving bar
151b: alignment plate
151c: Elastic member
20a, 20b: electrode plate
30a, 30b: Electrode lead
40: first frame part
41: first frame
42: first end plate
50: second frame part
51: second frame
510: Spring Home
511: Combined protrusion
52: second end plate
53: Pressure plate
530: Spring Home
54: spring
60: Third frame part
61: Upper and lower frames
610: coupling hole
62: Side frame
620: coupling hole

Claims (1)

stack;
Electrode plates respectively attached to the front and back sides of the stack to transmit current;
an electrode lead connected to the electrode plate and exposed to the outside;
a first frame portion installed on the rear side of the stack and in contact with an outer surface of the electrode plate;
A second frame part installed on the front side of the stack in contact with the outer surface of the electrode plate and provided with a spring to press the stack, and
It includes a third frame part that fixes the separation distance between the first and second frame parts,
The stack is,
A pair of through holes are formed and a plurality of battery cells are stacked;
A pair of jig plates formed in a plate shape and disposed on both sides before and after the battery cells, including a stacking groove formed on one side to seat the battery cells and a rod hole formed at a position corresponding to the through hole;
It includes a support rod that penetrates the through hole, is inserted into the rod hole, and is installed on the jig plate,
The stack is,
It further includes an alignment auxiliary unit installed between the pair of jig plates to align the plurality of battery cells,
The alignment auxiliary unit,
A moving hole is formed to penetrate the jig plate from the front and back, and has a length along each circumferential surface, and
An alignment unit installed in the moving hole of the pair of jig plates and moving along the moving hole while contacting the battery cells to align a plurality of battery cells,
The sorting unit,
a moving bar inserted into the moving hole and moving along the moving hole;
An alignment plate that is in contact with and aligns the battery cells, and
A fuel cell stack assembly including an elastic member formed between the moving bar and the alignment plate to provide elasticity to the alignment plate.