CN219677283U - Single pole plate, single cell and fuel cell stack - Google Patents

Abstract

The utility model provides a single pole plate, a single cell and a fuel cell stack, and relates to the technical field of fuel cells. The monopole plate comprises a monopole plate body and a sealing adhesive tape; the single-pole plate body is provided with a sealing groove extending along the circumferential direction of the single-pole plate body, and the width of the sealing groove is larger than that of the sealing adhesive tape; the side wall of the sealing groove is provided with a glue feeding groove and a glue discharging groove, and the bottom wall of the glue feeding groove and the bottom wall of the glue discharging groove are level with the bottom wall of the sealing groove; the sealing rubber strip is fixedly connected with the sealing groove. The monopole plate solves the technical problems of low installation efficiency, poor reliability, low precision and influence on the service life of a galvanic pile of sealing rubber strips in the prior art.

Description

Single pole plate, single cell and fuel cell stack

Technical Field

The utility model relates to the technical field of fuel cells, in particular to a monopole plate, a single cell and a fuel cell stack.

Background

A hydrogen fuel cell is a chemical device that directly converts chemical energy of a hydrogen fuel into electric energy, and a fuel cell stack is composed of a large number of identical unit cells, each unit cell being composed of a cathode plate, an anode plate, and a membrane electrode.

A cooling liquid chamber is formed between two adjacent single cells, so one side of the cathode plate and one side of the anode plate are gas sides, the other side of the cathode plate and the anode plate are cooling liquid sides, one side of the membrane electrode is a cathode side, and the other side of the membrane electrode is an anode side. In the prior art, a sealing rubber strip is generally arranged on the cooling liquid side of a cathode plate, and sealing of cooling liquid and reaction gas is realized by compressing the sealing rubber strip between two adjacent single cells in a galvanic pile. The general sealing rubber strip is formed through prefabrication, and then the formed sealing rubber strip is adhered to the cooling liquid side of the cathode plate; the installation process has low efficiency, poor reliability and low precision through bonding, and the service life of the bonding sealing adhesive tape also restricts the service life of the whole galvanic pile.

Disclosure of Invention

The utility model aims to provide a single pole plate, a single cell and a fuel cell stack so as to solve the technical problems of low installation efficiency, poor reliability, low precision and influence on the service life of the stack of sealing rubber strips in the prior art.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows:

in a first aspect, the monopolar plate provided by the utility model comprises a monopolar plate body and a sealing rubber strip;

the monopole plate body is provided with a sealing groove extending along the circumferential direction of the monopole plate body, and the width of the sealing groove is larger than that of the sealing rubber strip;

the side wall of the sealing groove is provided with a glue inlet groove and a glue outlet groove, and the bottom wall of the glue inlet groove and the bottom wall of the glue outlet groove are level with the bottom wall of the sealing groove;

and the sealing rubber strip is fixedly connected with the sealing groove.

Further, the glue inlet groove and the glue outlet groove are respectively positioned at two ends of the monopole plate body.

Still further, advance the gluey groove with the row of gluey groove all is provided with a plurality ofly, a plurality of advance gluey groove and a plurality of the row of gluey groove all is followed the extending direction interval setting of seal groove.

Still further, the lateral wall of seal groove still is equipped with the recess, the diapire of recess with the diapire parallel and level of seal groove.

Still further, the bottom wall of the recess is provided in a serpentine configuration with a serpentine angle of 120 ° -175 °.

Still further, the recess is provided with a plurality of, and a plurality of the recess is followed the extending direction interval setting of seal groove.

Still further, the seal grooves include a main seal groove and a plurality of first secondary seal grooves, and the unipolar plate body is provided with a first manifold port and a second manifold port;

the first manifold port and the second manifold port are arranged at intervals along the width direction of the unipolar plate body and are positioned at the first end of the unipolar plate body;

the main seal groove extends along the circumferential direction of the monopole plate body, the first seal groove is arranged on the periphery of the first manifold port and the periphery of the second manifold port, and the first seal is communicated with the main seal groove;

and the joint of the main sealing groove and the first sealing groove is provided with the glue inlet groove.

Still further, the sealing groove further comprises a plurality of second sealing grooves, and the unipolar plate body is further provided with a third manifold port and a fourth manifold port;

the third manifold port and the fourth manifold port are arranged at intervals along the width direction of the unipolar plate body and are both positioned at the second end of the unipolar plate body;

the second seal groove is arranged on the periphery of the third manifold port and the periphery of the fourth manifold port, and the second seal is communicated with the main seal groove;

and the joint of the main sealing groove and the secondary sealing groove is provided with the glue discharging groove.

In a second aspect, the present utility model provides a cell comprising a membrane electrode and a unipolar plate as defined in any one of the preceding claims;

the monopole plates are respectively arranged on two sides of the membrane electrode, and the surface of the monopole plate, which is away from the sealing groove, is opposite to the membrane electrode.

In a third aspect, the present utility model provides a fuel cell stack comprising a single cell as described above.

In summary, the technical effects achieved by the utility model are analyzed as follows:

the monopole plate provided by the utility model comprises a monopole plate body and a sealing rubber strip; the single-pole plate body is provided with a sealing groove extending along the circumferential direction of the single-pole plate body, and the width of the sealing groove is larger than that of the sealing adhesive tape; the side wall of the sealing groove is provided with a glue feeding groove and a glue discharging groove, and the bottom wall of the glue feeding groove and the bottom wall of the glue discharging groove are level with the bottom wall of the sealing groove; the sealing rubber strip is fixedly connected with the sealing groove. The width of seal groove is greater than joint strip's width, and the lateral wall of seal groove is equipped with into gluey groove and row's gluey groove, makes the place that corresponds with mould and seal groove can stretch into in the seal groove in order to support whole mould, realizes that the mould can be steady install on the unipolar plate body, and then conveniently to the injection liquid between mould and the seal groove, adopts the injection molding technology to realize joint strip and unipolar plate body's connection. Because the sealing rubber strip is installed by adopting an injection molding process, the problems of low installation efficiency, poor reliability and low precision of the sealing rubber strip are solved; the sealing rubber strip is installed by adopting an injection molding process, so that the sealing rubber strip is required to be made of a material suitable for injection molding, and compared with the common glue, the sealing rubber strip has long service life, and the problem that the sealing rubber strip affects the service life of a galvanic pile is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a unipolar plate body according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a unipolar plate body according to an embodiment of the present disclosure;

FIG. 3 is a schematic cross-sectional view at A-A of FIG. 2;

FIG. 4 is a schematic cross-sectional view at B-B in FIG. 2;

fig. 5 is a schematic processing diagram of a unipolar plate body according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a single cell according to an embodiment of the present utility model;

fig. 7 is a cross-sectional view of a fuel cell stack according to an embodiment of the present utility model.

Icon:

100-monopolar plate body; 110-sealing the groove; 111-a main seal groove; 112-first seal groove; 113-second seal groove; 120-a glue feeding groove; 130-a glue discharging groove; 140-grooves; 150-a first manifold port; 160-a second manifold port; 170-a third manifold port; 180-fourth manifold ports; 121-a glue feeding point; 131-glue discharging points; 200-sealing rubber strips; 400-membrane electrode; 510-upper template; 520-upper mold core; 521-glue inlet; 522-a glue outlet; 530-lower template; 540-lower mold core; 531-heating means.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

Example 1

The monopole plate provided by the embodiment of the utility model comprises a monopole plate body 100 and a sealing rubber strip 200; the unipolar plate body 100 is provided with a sealing groove 110 extending along the circumferential direction of the unipolar plate body 100, and the width of the sealing groove 110 is greater than the width of the sealing rubber strip 200; the side wall of the sealing groove 110 is provided with a glue inlet groove 120 and a glue outlet groove 130, and the bottom wall of the glue inlet groove 120 and the bottom wall of the glue outlet groove 130 are level with the bottom wall of the sealing groove 110; the sealing strip 200 is fixedly connected with the sealing groove 110. The width of seal groove 110 is greater than the width of joint strip 200, and the lateral wall of seal groove 110 is equipped with into gluey groove 120 and row's gluey groove 130, makes the place that corresponds with mould and seal groove 110 can stretch into in order to support whole mould in the seal groove 110, realizes that the mould can be steady install on unipolar plate body 100, and then conveniently to the injection liquid between mould and the seal groove 110, adopts the injection molding technology to realize joint strip 200 and unipolar plate body 100's connection. Because the sealing rubber strip 200 is installed by adopting an injection molding process, the problems of low installation efficiency, poor reliability and low precision of the sealing rubber strip 200 are solved; the sealing rubber strip 200 is installed by adopting an injection molding process, so that the sealing rubber strip 200 is required to be made of a material suitable for injection molding, and compared with the common glue, the sealing rubber strip 200 has a long service life, and the problem that the service life of a galvanic pile is influenced is avoided.

The shape and structure of the unipolar plate are described in detail below:

in an alternative scheme of the embodiment of the utility model, the unipolar plate comprises a cathode plate and an anode plate, both the cathode plate and the anode plate are provided with sealing grooves 110, and sealing rubber strips 200 are arranged in the sealing grooves 110.

In an alternative embodiment of the present utility model, the glue inlet groove 120 and the glue outlet groove 130 are respectively located at two ends of the unipolar plate body 100.

Specifically, in this embodiment, referring to fig. 1 to 4, the width of the bottom wall of the sealing groove 110 is 0.8-2mm greater than the width of the sealing strip 200, and the sealing strip 200 is centrally installed, and the positions left on both sides of the sealing strip 200 are the positions of the edge seals of the mold.

The glue inlet groove 120 and the glue outlet groove 130 are respectively positioned at two ends of the unipolar plate body 100, so that when the sealing rubber strip 200 is subjected to injection molding, liquid enters the sealing groove 110 from the glue inlet point 121 of the glue inlet groove 120, flows to the glue outlet point 131 of the glue outlet groove 130 along the extending direction of the sealing groove 110, and flows out to form the complete sealing rubber strip 200.

In an alternative embodiment of the present utility model, a glue inlet 121 is disposed in the glue inlet 120.

Specifically, the glue inlet point 121 is 200-4mm away from the sealing rubber strip.

The bottom wall of the glue inlet groove 120 is flush with the bottom wall of the sealing groove 110 and is a plane, so that the edge sealing of the die is convenient to extend into the glue inlet groove 120, and liquid is input to the glue inlet point 121; the bottom wall of the glue inlet groove 120 provides a supporting force for the edge sealing of the die, so that the die can be stably mounted on the unipolar plate body 100.

In an alternative embodiment of the present utility model, a glue discharging point 131 is disposed in the glue discharging groove 130.

Specifically, the glue discharging point 131 is 200-4mm away from the sealing rubber strip.

The bottom wall of the glue discharging groove 130 is flush with the bottom wall of the sealing groove 110, is planar, facilitates the edge sealing of the die to extend into the glue discharging groove 130, and outputs liquid from the glue discharging point 131; the bottom wall of the glue drain groove 130 provides a supporting force for the edge sealing of the die, so that the die can be stably mounted on the unipolar plate body 100.

In an alternative scheme of the embodiment of the present utility model, a plurality of glue inlet grooves 120 and glue outlet grooves 130 are provided, and the plurality of glue inlet grooves 120 and the plurality of glue outlet grooves 130 are all arranged at intervals along the extending direction of the sealing groove 110.

Specifically, the unipolar plate body 100 is provided in a rectangular shape.

The glue inlet grooves 120 and the glue outlet grooves 130 are all provided with a plurality of glue outlet grooves, so that liquid can be injected or output from different positions, and the sealing rubber strips 200 formed by injection molding are even.

In an alternative embodiment of the present utility model, the side wall of the sealing groove 110 is further provided with a groove 140, and the bottom wall of the groove 140 is flush with the bottom wall of the sealing groove 110.

Specifically, the side wall of the seal groove 110 near the center of the unipolar plate body 100 is provided with a groove 140 to avoid occupying the edge position of the unipolar plate body 100 and reduce the strength of the unipolar plate body 100.

The bottom wall of the groove 140 is flush with the bottom wall of the sealing groove 110 and is planar, so that the sealing edge of the die can conveniently extend into the groove 140, and the bottom wall of the groove 140 provides supporting force for the sealing edge of the die, so that the die can be stably mounted on the unipolar plate body 100. In addition, the glue inlet 121 or the glue outlet 131 may be disposed in the groove 140.

In an alternative embodiment of the present utility model, a plurality of grooves 140 are provided, and a plurality of grooves 140 are spaced apart along the extending direction of the sealing groove 110.

Specifically, the space between the two grooves 140 is determined according to the number of the glue injection points and the glue discharge points 131 in actual requirements, and typically 3-10 single sides of the monopole plate body 100 are provided. In this embodiment, referring to fig. 1, six grooves 140 are provided, three of which are located on the right side of the unipolar plate body 100, and the other three of which are located on the left side of the unipolar plate body 100. Of course, the number of the grooves 140 is set to other numbers, for example, two, four or eight, etc., and also falls within the scope of the present utility model.

The plurality of grooves 140 provides a plurality of support points for the edge seal of the die to provide a more stable mounting of the die to the unipolar plate body 100.

In an alternative embodiment of the utility model, the bottom wall of the groove 140 is provided in a serpentine configuration, the serpentine angle being set at 120 ° -175 °, the serpentine wavelength being set at 5-10mm.

The bottom wall of the groove 140 can bear the pressure of the injection mold, so that the sealing rubber strip 200 can be injection molded.

In an alternative to the embodiment of the present utility model, the seal groove 110 includes a main seal groove 111 and a plurality of first sub seal grooves 112, and the unipolar plate body 100 is provided with a first manifold port 150 and a second manifold port 160; the first manifold port 150 and the second manifold port 160 are disposed at intervals along the width direction of the unipolar plate body 100 and are each located at a first end of the unipolar plate body 100; the main seal groove 111 extends along the circumferential direction of the unipolar plate body 100, the outer circumferences of the first and second manifold ports 150 and 160 are each provided with a first seal groove 112, and the first seal communicates with the main seal groove 111; the joint of the main seal groove 111 and the first seal groove 112 is provided with a glue inlet groove 120.

Specifically, a fifth manifold port is also provided between the first and second manifold ports 150, 160. Further, a groove 140 is provided in the main seal groove 111.

The first sealing groove 112 is formed around the outer periphery of the first manifold port 150 and the second manifold port 160, and the sealing adhesive tape 200 is installed in the first sealing groove 112, so that the first manifold port 150 and the second manifold port 160 are sealed, and the sealing performance of the unipolar plate body 100 is improved. The intersection of the first seal groove 112 and the main seal groove 111 reduces the intersection fillet to form the glue inlet groove 120, increases the area of the intersection, facilitates the edge sealing of the die to extend in, and further realizes the stable installation of the die.

In an alternative of the embodiment of the present utility model, the sealing slot 110 further includes a plurality of second sealing slots 113, and the unipolar plate body 100 is further provided with a third manifold port 170 and a fourth manifold port 180; the third and fourth manifold ports 170, 180 are spaced apart along the width direction of the unipolar plate body 100 and are each located at a second end of the unipolar plate body 100; the outer circumferences of the third and fourth manifold ports 170, 180 are each provided with a second secondary seal groove 113, and the second secondary seals communicate with the primary seal groove 111; the joint of the main seal groove 111 and the secondary seal groove 113 is provided with a glue discharging groove 130.

Specifically, a sixth manifold port is also provided between the third and fourth manifold ports 170, 180.

The second sealing groove 113 is arranged on the periphery of the third manifold port 170 and the periphery of the fourth manifold port 180, and the sealing rubber strip 200 is arranged in the second sealing groove 113, so that the third manifold port 170 and the fourth manifold port 180 are sealed, and the sealing performance of the monopole plate body 100 is improved. The intersection of the secondary seal groove 113 and the main seal groove 111 reduces the intersection fillet to form a glue discharging groove 130, increases the area of the intersection, facilitates the extension of the edge sealing of the die, and further realizes the stable installation of the die.

In an alternative embodiment of the present utility model, the sealing strip 200 is made of a material with low viscosity and good fluidity.

Specifically, the sealing rubber strip 200 is made of liquid or solid silica gel, fluororubber or ethylene propylene diene monomer.

The material with low viscosity and good fluidity is convenient to flow in the sealing groove 110, so that the formed sealing rubber strip 200 is prevented from being notched.

The process of injection molding the sealing strip 200 is described as follows:

referring to fig. 5, the mold includes an upper mold plate 510, an upper mold core 520, a lower mold plate 530 and a lower mold core 540, wherein the upper mold plate 510 and the lower mold plate 530 are disposed opposite to each other and are provided with mounting holes; the upper die core 520 is installed in the installation hole of the upper die plate 510, the lower die core 540 is installed in the installation hole of the lower die plate 530, and the unipolar plate body 100 is clamped between the upper die core 520 and the lower die core 540; the upper die core 520 is provided with a glue inlet 521 and a glue outlet 522; the lower mold plate 530 is provided with a heating device 531. More preferably, the heating means 531 is provided as a plurality of straight cylindrical heating rods.

Liquid silica gel is injected into the glue inlet 521 of the mold by using injection molding equipment, and when the glue overflows from the glue outlet of the mold, the mold is filled with the glue, the heating device 531 solidifies the glue, and the continuous sealing rubber strip 200 is formed in the sealing groove 110.

Example two

The single cell provided by the embodiment of the utility model comprises the single pole plate in the first embodiment, so that all the beneficial effects in the first embodiment are also achieved, and the description is omitted here.

In an alternative scheme of the embodiment of the utility model, the single cell comprises a membrane electrode 400, wherein a single pole plate is respectively arranged on two sides of the membrane electrode 400, and the surface of the single pole plate, which is away from the sealing groove, is opposite to the membrane electrode.

Specifically, referring to fig. 6, the unipolar plates include an anode plate and a cathode plate, and two unipolar plates are provided as the anode plate and the cathode plate, respectively, within one single cell; the membrane electrode 400 is sandwiched between the cathode plate and the anode plate, so that the hydrogen oxidation reaction and the oxygen reduction reaction respectively occur at the two sides of the membrane electrode 400.

The cathode plate and the anode plate play roles of conducting, isolating gas and supporting in the single cell.

Example III

The fuel cell stack provided by the embodiment of the utility model comprises the single cells in the second embodiment, so that all the beneficial effects in the second embodiment are also achieved, and the details are not repeated here.

In an alternative embodiment of the present utility model, referring to fig. 7, a plurality of single cells are provided, and a plurality of single cells are stacked in sequence.

Specifically, a 100KW fuel cell stack is formed by stacking 300-400 single cells.

A plurality of single cells are stacked to increase the power of the fuel cell stack.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. A monopolar plate, comprising: a unipolar plate body (100) and a sealing strip (200);

the monopole plate body (100) is provided with a sealing groove (110) extending along the circumferential direction of the monopole plate body (100), and the width of the sealing groove (110) is larger than that of the sealing rubber strip (200);

the side wall of the sealing groove (110) is provided with a glue inlet groove (120) and a glue outlet groove (130), and the bottom wall of the glue inlet groove (120) and the bottom wall of the glue outlet groove (130) are flush with the bottom wall of the sealing groove (110);

the sealing rubber strip (200) is fixedly connected with the sealing groove (110).

2. The unipolar plate of claim 1, wherein the glue inlet slot (120) and the glue outlet slot (130) are located at each end of the unipolar plate body (100).

3. The unipolar plate of claim 2, wherein the glue inlet slot (120) and the glue outlet slot (130) are each provided in plurality, and the glue inlet slot (120) and the glue outlet slot (130) are each disposed at intervals along the extending direction of the seal slot (110).

4. The unipolar plate of claim 1, wherein the side wall of the seal groove (110) is further provided with a groove (140), a bottom wall of the groove (140) being flush with a bottom wall of the seal groove (110).

5. The unipolar plate of claim 4, wherein the grooves (140) are provided in a plurality, the plurality of grooves (140) being spaced apart along the direction of extension of the seal groove (110).

6. The unipolar plate according to claim 5, characterized in that the bottom wall of the recess (140) is provided in a serpentine configuration, the serpentine angle being set between 120 ° and 175 °.

7. The unipolar plate of claim 1, characterized in that the seal slot (110) includes a primary seal slot (111) and a plurality of primary seal slots (112), the unipolar plate body (100) being provided with a first manifold port (150) and a second manifold port (160);

the first manifold port (150) and the second manifold port (160) are disposed at intervals along the width direction of the unipolar plate body (100) and are both located at a first end of the unipolar plate body (100);

the main seal groove (111) extends along the circumferential direction of the monopole plate body (100), the first sub seal groove (112) is arranged on the periphery of each of the first manifold port (150) and the second manifold port (160), and the first sub seal is communicated with the main seal groove (111);

the joint of the main sealing groove (111) and the first sealing groove (112) is provided with the glue inlet groove (120).

8. The unipolar plate of claim 7, wherein the seal slot (110) further includes a plurality of second seal slots (113), the unipolar plate body (100) further being provided with third and fourth manifold ports (170, 180);

the third manifold port (170) and the fourth manifold port (180) are disposed at intervals along the width direction of the unipolar plate body (100) and are both located at the second end of the unipolar plate body (100);

the second seal groove (113) is arranged on the periphery of the third manifold port (170) and the periphery of the fourth manifold port (180), and the second seal is communicated with the main seal groove (111);

the joint of the main sealing groove (111) and the secondary sealing groove (113) is provided with the glue discharging groove (130).

9. A single cell characterized by comprising a membrane electrode (400) and a single plate according to any one of claims 1-7;

the monopole plates are respectively arranged on two sides of the membrane electrode (400), and the surface of the monopole plate, which is away from the sealing groove, is opposite to the membrane electrode (400).

10. A fuel cell stack comprising the single cell according to claim 9.