CN113540490A

CN113540490A - Fuel cell electrode plate, fuel cell monomer and fuel cell

Info

Publication number: CN113540490A
Application number: CN202110689893.5A
Authority: CN
Inventors: 崔龙; 陈楠; 孙宗华; 李利; 韩建
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2021-10-22
Anticipated expiration: 2041-06-22
Also published as: CN113540490B

Abstract

The invention relates to a fuel cell electrode plate, a fuel cell monomer and a fuel cell, and relates to the technical field of fuel cells. The fuel cell electrode plate comprises a bottom plate and a plurality of supporting ridges, wherein the supporting ridges are arranged on the same side of the bottom plate at intervals, gas flow channels are formed adjacent to the supporting ridges, a plurality of vent grooves are formed in the supporting ridges at intervals, and the vent grooves penetrate through the upper surface and at least one side wall of the supporting ridges. The fuel cell monomer applies the fuel cell electrode plate, the fuel cell applies the fuel cell monomer, the gas transmission efficiency of hydrogen and oxygen (or air) to a gas diffusion layer of a membrane electrode is improved, and water generated by the reaction of the hydrogen and the oxygen (or air) can flow into a gas flow channel along the vent groove and is blown out by airflow, so that the performance of the fuel cell is improved.

Description

Fuel cell electrode plate, fuel cell monomer and fuel cell

Technical Field

The invention relates to the technical field of fuel cells, in particular to a fuel cell electrode plate, a fuel cell monomer and a fuel cell.

Background

The fuel cell is a clean power generation technology for directly converting chemical energy in fuel and oxidant into electric energy through electrocatalysis reaction, and has the advantages of high energy conversion efficiency, simple structure, low emission, low noise and the like. The bipolar plate is one of the core components of the fuel cell, and accounts for 70-80% of the weight of the whole cell and more than 45% of the cost. Meanwhile, the bipolar plate plays many roles in a fuel cell, and has the functions of distributing fuel, connecting each single cell in a cell stack in series, collecting current, supporting a membrane electrode and the like. The bipolar plates include a graphite bipolar plate made of a graphite material, and a metal bipolar plate made of a metal material such as stainless steel.

The proton exchange membrane fuel cell is one of the main technical routes of new energy automobiles, the bipolar plate of the fuel cell is a key part of the fuel cell, and the fuel cell is mainly characterized in that an anode flow field plate and a cathode flow field plate clamp a Membrane Electrode (MEA) to obtain a single fuel cell structure. The anode plate and the cathode plate are combined together to form the bipolar plate. The bipolar plate provides fuel and oxidant for the fuel cell, the reaction generates electricity, simultaneously discharges the water generated by the reaction, and leads out the generated heat.

The bipolar plate flow field structure comprises a gas conveying channel and a supporting ridge contacted with the membrane electrode, and reaction gas permeates and diffuses to a gas diffusion layer and a catalyst layer in the membrane electrode, but the ridge supported by the bipolar plate is pressed by two sides, so that the compaction degree of the gas diffusion layer under the contact part of the ridge surface and the membrane electrode is higher, the gas permeation and diffusion are difficult, water generated by reaction is easy to accumulate and is difficult to discharge, and the performance of the fuel cell is influenced.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a fuel cell electrode plate, a fuel cell unit and a fuel cell, which are capable of solving the problem of difficulty in gas permeation and diffusion of a fuel cell with a bipolar plate flow field structure.

According to an aspect of the present application, there is provided a fuel cell electrode plate including:

a base plate; and

the supporting ridges are arranged on the same side of the bottom plate at intervals, gas flow channels are formed by adjacent supporting ridges, a plurality of vent grooves are formed in the supporting ridges at intervals, and the vent grooves penetrate through the upper surface and at least one side wall of the supporting ridges.

In this way, the hydrogen and oxygen (or air) are respectively transmitted to the gas diffusion layer of the membrane electrode through the vent grooves of the fuel cell electrode plate positioned on the supporting ridges, the gas transmission efficiency of the hydrogen and oxygen (or air) to the gas diffusion layer of the membrane electrode is improved, and water generated by the reaction of the hydrogen and oxygen (or air) can flow into the gas flow channels along the vent grooves and is blown out by the gas flow, so that the performance of the fuel cell is improved.

As a further improvement of the above technical solution:

in one embodiment, the slotting direction of the vent groove and the flowing direction of the gas in the gas flow channel form an included angle of less than 90 degrees.

Thus, the gas flowing along the gas flow passage can enter the vent groove conveniently.

In one embodiment, the ventilation grooves are formed on two sides of the supporting ridge, the ventilation groove on each side penetrates through one side wall and the upper surface of the supporting ridge, and the ventilation grooves on two sides of the same supporting ridge are independent.

So, all seted up the air channel in the both sides of supporting the ridge, the gas in the gas flow channel of being convenient for support ridge both sides all can get into the air channel of same support ridge, has improved the gaseous volume that gets into in the air channel in the unit interval to further strengthened gaseous to the intraformational gas transmission and the diffusion efficiency of membrane electrode.

In one embodiment, a distance of the vent groove perpendicular to a flow direction of the gas in the gas flow channel is less than one-half of a width of the support ridge.

In this way, even if the vent grooves on both sides of the same supporting ridge are disposed oppositely, the vent grooves on both sides of the same supporting ridge do not communicate with each other.

In one embodiment, the height of the vent channel is less than or equal to one-half of the height of the support ridge.

The above is only the preferred technical solution of the present invention.

In one embodiment, the distance between adjacent vent grooves is less than the sum of the width of the support ridge and the width of the gas flow channel.

In one embodiment, two sides of the bottom plate along the extending direction of the supporting ridge are provided with sealing connection parts, and when two fuel cell electrode plates form a single fuel cell, the two fuel cell electrode plates are connected in a sealing manner through the sealing connection parts.

Thus, when two fuel cell electrode plates are clamped on the membrane electrode to form a fuel cell unit, the two fuel cell electrode plates are mutually matched through the sealing connection parts along the two sides of the extension direction of the supporting ridge, so that the fuel cell unit is sealed along the two sides of the extension direction of the supporting ridge, and gas is prevented from leaking from the fuel cell unit along the two sides of the extension direction of the supporting ridge.

In one embodiment, the seal connecting portion of one of the two fuel cell electrode plates includes a projection, and the other of the two fuel cell electrode plates includes a groove, and the two fuel cell electrode plates are sealingly connected to the groove via the projection.

The above is only the preferred technical solution of the present invention.

According to another aspect of the present application, there is provided a fuel cell including:

two of the above fuel cell electrode plates; and

and the two fuel cell electrode plates are clamped on the membrane electrode.

According to still another aspect of the present application, there is provided a fuel cell including a plurality of the above fuel cell units, and the plurality of the fuel cell units are connected in series with each other.

The fuel cell electrode plate comprises a bottom plate and a plurality of supporting ridges, wherein the supporting ridges are arranged on the same side of the bottom plate at intervals, gas flow channels are formed between adjacent supporting ridges, a plurality of vent grooves are arranged at intervals on the supporting ridges, and the vent grooves penetrate through the upper surface and at least one side wall of the supporting ridges. The fuel cell monomer comprises two fuel cell electrode plates and a membrane electrode, and the two fuel cell electrode plates are clamped on the membrane electrode. The fuel cell comprises a plurality of fuel cell units, and the plurality of fuel cell units are connected in series. Compared with the prior supporting ridge without the vent grooves, the fuel cell electrode plate provided by the invention improves the gas transmission efficiency of the hydrogen and the oxygen (or the air) to the gas diffusion layer of the membrane electrode, and water generated by the reaction of the hydrogen and the oxygen (or the air) can flow into the gas flow channel along the vent grooves and is blown out by the gas flow, thereby improving the performance of the fuel cell.

Drawings

Fig. 1 is a schematic structural diagram of a fuel cell electrode plate according to an embodiment of the present invention;

fig. 2 is a top view of a fuel cell electrode plate according to an embodiment of the present invention;

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

fig. 4 is a schematic structural diagram of a fuel cell according to an embodiment of the present invention.

Reference numerals:

100. a fuel cell electrode plate; 110. a base plate; 120. a support ridge; 121. an upper surface; 122. a side wall; 123. a vent channel; 130. a gas flow channel; 140. sealing the connection part; 200. a membrane electrode; 300. a fuel cell.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, fig. 1 shows a schematic structural diagram of a fuel cell electrode plate according to an embodiment of the present invention, which is a fuel cell according to an embodiment of the present invention, so as to reduce difficulty in permeation and diffusion of fuel cell gas into a gas diffusion layer of a membrane electrode 200 in a bipolar plate flow field structure, thereby improving gas permeation and diffusion efficiency of the fuel cell in the bipolar plate flow field structure, and improving performance of the fuel cell.

As described in the background art, the existing bipolar plate flow field structure includes gas transmission channels and supporting ridges in contact with the membrane electrode, and the reaction gas permeates and diffuses into the gas diffusion layer and the catalyst layer in the membrane electrode, but the ridges supported by the bipolar plate are subjected to pressure on both sides, so that the degree of compaction of the gas diffusion layer under the contact portion between the ridge surface and the membrane electrode is high, the gas permeation and diffusion are difficult, and water generated by the reaction is easily accumulated and is difficult to discharge, thereby affecting the performance of the fuel cell.

In order to solve the above problem, the present embodiment provides a fuel cell including a plurality of fuel cells 300. The plurality of fuel cell units 300 are connected in series, and the plurality of fuel cell units 300 are stacked in a gap manner, so that a cooling flow field is formed between two connected fuel cell units 300. Because the fuel cell can generate heat in the discharging process, the cooling flow field is arranged between the single fuel cell 300, the single fuel cell 300 can be conveniently cooled, and the influence on the discharging efficiency and the safety performance of the fuel cell caused by the overhigh temperature of the single fuel cell 300 is avoided.

Specifically, referring to fig. 4, fig. 4 shows a schematic structural diagram of a fuel cell unit according to an embodiment of the present invention, the fuel cell unit 300 includes two fuel cell electrode plates 100 and a membrane electrode 200, and the two fuel cell electrode plates 100 are an anode plate and a cathode plate of the fuel cell unit 300, respectively. One surface of the membrane electrode 200 is attached to an anode plate, the other surface of the membrane electrode 200 is attached to a cathode plate, the anode plate is used for providing hydrogen to the fuel cell unit 300, the cathode plate is used for providing oxygen to the fuel cell unit 300, the hydrogen and the oxygen are respectively diffused to the membrane electrode 200, proton exchange is carried out through a proton exchange membrane of the membrane electrode 200, an electric reaction is carried out, water is generated, and energy is released.

In the fuel cell 300 provided in the present embodiment, the anode plate is used to supply hydrogen to the fuel cell 300, and the cathode plate is used to supply oxygen to the fuel cell 300. Of course, it is understood that the anode plate may also be used to provide other fuels to the fuel cell 300, and the cathode plate may also be used to provide other oxygen-containing gases, such as air, to the fuel cell 300. The anode plate is used to supply hydrogen to the fuel cell 300, and the cathode plate is used to supply oxygen to the fuel cell 300. The above is only a preferred embodiment of the present invention, and is not limited herein.

Referring to fig. 1, fig. 2 and fig. 3, fig. 1 is a schematic structural diagram of a fuel cell electrode plate according to an embodiment of the present invention, fig. 2 is a top view of the fuel cell electrode plate according to the embodiment of the present invention, and fig. 3 is a cross-sectional view of a-a section in fig. 2.

The fuel cell electrode plate 100 comprises a base plate 110 and a plurality of supporting ridges 120, wherein the supporting ridges 120 are arranged on the same side of the base plate 110 at intervals, the membrane electrode 200 is in contact with the upper surfaces of the supporting ridges 120, gas flow channels 130 are formed between adjacent supporting ridges 120, a plurality of vent grooves 123 are formed in the supporting ridges 120 at intervals, and the vent grooves 123 penetrate through the upper surface 121 and at least one side wall 122 of the supporting ridge 120. Hydrogen or oxygen flows into the fuel cell electrode plate 100 from one end of the gas flow channels 130 between the plurality of supporting ridges 120, and the hydrogen or oxygen flows along the gas flow channels 130 into the vent grooves 123 located on the supporting ridges 120. Since the membrane electrode 200 is in contact with the upper surfaces of the plurality of support ridges 120 and the vent grooves 123 penetrate the upper surfaces 121 of the support ridges 120 and the at least one side wall 122, hydrogen or oxygen that enters the inside of the vent grooves 123 permeates and diffuses directly toward the membrane electrode 200 from the upper side of the support ridges 120.

In the fuel cell electrode plate 100 provided in this embodiment, the bottom plate 110 is a rectangular plate-shaped structure, the supporting ridges 120 are rectangular prism-shaped structures, and the supporting ridges 120 are uniformly arranged on the same side of the bottom plate 110 at regular intervals, so that the gas flow channels 130 formed by adjacent supporting ridges 120 are straight flow channels. Of course, it is understood that the base plate 110 may have other configurations, such as a square plate-like configuration; the support ridges 120 may have other structures, such as a rectangular cross section, a curved three-dimensional structure extending in a curved direction, etc., and accordingly, the gas flow channels 130 formed by adjacent support ridges 120 are curved flow channels. The bottom plate 110 is a rectangular plate-shaped structure, the supporting ridges 120 are rectangular parallelepiped columnar structures, and the supporting ridges 120 are uniformly arranged on the same side of the bottom plate 110 at fixed intervals.

In the fuel cell electrode plate 100, the groove opening direction of the vent groove 123 forms an angle smaller than 90 degrees with the gas flowing direction in the gas flow channel 130. Since the hydrogen or oxygen flows into the gas channel 130 from one end of the gas channel 130 and enters the vent groove 123 along the gas channel 130, the slotting direction of the vent groove 123 is designed to form an included angle α smaller than 90 degrees with the flowing direction of the gas in the gas channel 130, so that the hydrogen or oxygen can enter the vent groove 123 along the gas channel 130.

Preferably, the slotting direction of the vent slots 123 forms an angle α of 30 ° to 60 ° with the flowing direction of the gas in the gas flow channels 130, and in the fuel cell electrode plate 100 provided in the present embodiment, the slotting direction of the vent slots 123 forms an angle α of 45 ° with the flowing direction of the gas in the gas flow channels 130. When hydrogen or oxygen flows into the gas flow channel 130 from one end of the gas flow channel 130 and enters the vent groove 123 at the vent groove 123 of the support ridge 120 in the grooving direction of the vent groove 123.

The depth of the gas channel 130 is 0.5mm, the width D is 0.5mm, and the width D of the supporting ridge 120 is 0.6 mm. The surface of the support ridge 120 contacting the membrane electrode 200 is provided with a vent groove 123 for allowing air to enter. The depth H of the vent groove 123 is not more than 1/2H, and is 0.25 mm. The entire area of the vent grooves 123 accounts for 10 to 30% of the contact area of the support ridges 120 with the membrane electrode 200.

In the fuel cell electrode plate 100 provided in the present embodiment, the grooving direction of the vent grooves 123 makes an angle α of 45 ° with the flow direction of the gas in the gas flow channels 130. Of course, it is understood that the slotting direction of the vent slots 123 and the flowing direction of the gas in the gas flow channel 130 can also form other included angles α smaller than 90 degrees, and preferably, the slotting direction of the vent slots 123 and the flowing direction of the gas in the gas flow channel 130 form an included angle α of 30 ° to 60 °. The slotting direction of the vent grooves 123 forms an angle α of 45 ° with the flow direction of the gas in the gas channel 130, which is only a preferred technical solution of the present invention and is not limited herein.

In the fuel cell electrode plate 100 according to another embodiment of the present invention, the vent grooves 123 are formed on both sides of the supporting ridge 120, the vent groove 123 on each side penetrates through one sidewall 122 of the supporting ridge 120 and the upper surface 121, and the opposite vent grooves 123 on both sides of the supporting ridge 120 are not communicated. The two sides of the supporting ridge 120 are respectively provided with the vent grooves 123, so that the gas in the gas flow channels 130 on the two sides of the supporting ridge 120 can enter the vent grooves 123 of the same supporting ridge 120 conveniently, the amount of the gas entering the vent grooves 123 in unit time is increased, and the gas transmission and diffusion efficiency of the gas in the gas diffusion layer of the membrane electrode is further enhanced.

Meanwhile, the opposite vent grooves 123 on both sides of the support ridge 120 are not communicated, and hydrogen or oxygen enters the vent grooves 123 from the openings of the vent grooves 123 on the side walls 122 of the support ridge 120, and as the amount of hydrogen or oxygen flowing into the vent grooves 123 increases, the hydrogen or oxygen stored in the vent grooves 123 is forced to transmit and diffuse gas from the openings of the vent grooves 123 on the upper surface of the support ridge 120 into the gas diffusion layer of the membrane electrode, thereby further improving the gas transmission and diffusion efficiency of gas into the gas diffusion layer of the membrane electrode.

The distance of the vent groove 123 perpendicular to the flow direction of the gas in the gas flow channel 130 is less than half the width of the support ridge 120. In the fuel cell electrode plate 100 provided in the present embodiment, the distance of the vent grooves 123 perpendicular to the flow direction of the gas in the gas flow channels 130 is equal to one third of the width d of the support ridge 120. In this way, even if the vent grooves 123 on both sides of the same supporting ridge 120 are oppositely disposed, the vent grooves 123 on both sides of the same supporting ridge 120 are independent from each other and do not communicate with each other. Of course, it is understood that the distance of the vent groove 123 perpendicular to the flow direction of the gas in the gas flow channel 130 is equal to one third of the width d of the supporting ridge 120, which is only a preferred embodiment of the present invention and is not limited thereto.

The height of the vent groove 123 is less than or equal to one-half of the height of the support ridge 120. In the fuel cell electrode plate 100 provided in the present embodiment, the height H of the vent groove 123 is equal to one third of the height H of the support ridge 120. Of course, it should be understood that the height H of the vent groove 123 is equal to one third of the height H of the supporting ridge 120, which is only a preferred embodiment of the present invention and is not limited thereto.

The distance between adjacent vent grooves 123 on the same support ridge 120 is less than the sum of the width D of the support ridge 120 and the width D of the gas flow channel 130. In the fuel cell electrode plate 100 provided in the present embodiment, the distance between the same support ridge 120 and the vent grooves 123 is equal to three-quarters of the sum of the width D of the support ridge 120 and the width D of the gas flow channels 130. Of course, it is understood that the distance between adjacent vent grooves 123 is equal to three quarters of the sum of the width D of the support ridge 120 and the width D of the gas flow channel 130, which is only a preferred embodiment of the present invention and is not limited thereto.

In the fuel cell electrode plate 100, the bottom plate 110 is further provided with sealing connection portions 140 at two sides along the extending direction of the supporting ridge 120, and when the two fuel cell electrode plates 100 sandwich the membrane electrode 200 to form a single fuel cell 300, the two fuel cell electrode plates 100 are connected in a sealing manner through the sealing connection portions 140. When two fuel cell electrode plates 100 are clamped to the membrane electrode 200 to form a fuel cell 300, the two fuel cell electrode plates 100 are mutually matched through the sealing connection parts 140 along the two sides of the extension direction of the supporting ridge 120, so that the two sides of the fuel cell 300 along the extension direction of the supporting ridge 120 are sealed, and gas is prevented from leaking from the two sides of the fuel cell 300 along the extension direction of the supporting ridge 120.

In the fuel cell electrode plate 100 provided in the present embodiment, the seal connection part 140 includes a projection and a groove, and the projection may be fitted to the groove. Specifically, grooves are provided on both sides of the bottom plate 110 of the anode plate of the fuel cell unit 300 in the extending direction of the support ridge 120, protrusions are provided on both sides of the bottom plate 110 of the cathode plate of the fuel cell unit 300 in the extending direction of the support ridge 120, and the grooves may be fitted with the protrusions. When the fuel cell is assembled, the anode plate and the cathode plate of the fuel cell 300 are clamped in a membrane electrode 200, and the protrusions at the two sides of the bottom plate 110 of the cathode plate along the extending direction of the supporting ridge 120 are embedded in the grooves at the two sides of the bottom plate 110 of the anode plate along the extending direction of the supporting ridge 120, the width of the sealing connection part 140 is 3.5mm, the width of the protrusion structure is 3mm, the height of the protrusion structure is 0.2mm, the width of the groove structure is 3.5mm, and the depth of the groove structure is 0.2 mm; the width of the protruding part is smaller than that of the groove part, so that the assembly of two polar plates is facilitated, a certain gap is reserved, and then the connecting seam of the protrusion and the groove is sealed by using a bonding agent, so that the sealing effect of the two sides of the fuel cell monomer 300 along the extending direction of the supporting ridge part 120 is further enhanced.

In another fuel cell electrode plate 100 provided in the present embodiment, the seal connection part 140 includes a protrusion and a groove, and the protrusion may be fitted to the groove. Specifically, grooves are formed on two sides of the bottom plate 110 of the cathode plate of the fuel cell 300 along the extending direction of the supporting ridge 120, protrusions are formed on two sides of the bottom plate 110 of the anode plate of the fuel cell 300 along the extending direction of the supporting ridge 120, and the grooves can be matched with the protrusions.

Of course, it is understood that the sealing connection portion 140 may also include other structural forms as long as it is capable of sealing both sides of the bottom plate 110 of the anode plate of the fuel cell unit 300 in the extending direction of the support ridge 120 and both sides of the bottom plate 110 of the cathode plate of the fuel cell unit 300 in the extending direction of the support ridge 120 to each other. The sealing connection portion 140 includes a protrusion and a groove, and the protrusion is adapted to the groove, which is only a preferred embodiment of the present invention and is not limited herein.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A fuel cell electrode plate, characterized by comprising:

a base plate; and

the supporting ridges are arranged on the same side of the bottom plate at intervals, gas flow channels are formed by adjacent supporting ridges, and a plurality of vent grooves are arranged at intervals on the supporting ridges, and each vent groove penetrates through the upper surface and at least one side wall of the supporting ridge.

2. The fuel cell electrode plate of claim 1, wherein the vent grooves are oriented at an angle of less than 90 degrees relative to the direction of gas flow in the gas flow channels.

3. The fuel cell electrode plate according to claim 1, wherein the vent grooves are formed on both sides of the supporting ridge, the vent groove on each side penetrates through one side wall and the upper surface of the supporting ridge, and the vent grooves on both sides of the same supporting ridge are independent of each other.

4. The fuel cell electrode plate according to claim 3, wherein a distance of the vent groove perpendicular to a flow direction of the gas in the gas flow channel is less than half of a width of the support ridge.

5. The fuel cell electrode plate according to claim 1, wherein the height of the vent groove is less than or equal to one-half of the height of the support ridge.

6. The fuel cell electrode plate of claim 1, wherein a distance adjacent the vent grooves is less than a sum of a width of the support ridge and a width of the gas flow channel.

7. The fuel cell electrode plate according to claim 1, wherein the bottom plate is provided with sealing joints on both sides in the extending direction of the support ridge, and when the two fuel cell electrode plates form a single fuel cell, the two fuel cell electrode plates are hermetically connected through the sealing joints.

8. The fuel cell electrode plate according to claim 7, wherein the seal-connecting portion of one of the two fuel cell electrode plates includes a projection, and the other of the two fuel cell electrode plates includes a groove, and the two fuel cell electrode plates are sealingly connected to the groove via the projection.

9. A fuel cell, comprising:

two fuel cell electrode plates according to any one of claims 1 to 8; and

and the two fuel cell electrode plates are clamped on the membrane electrode.

10. A fuel cell comprising a plurality of the fuel cell cells according to claim 9, wherein the plurality of fuel cell cells are connected in series with each other.