阅读说明：本技术 一种用于质子交换膜燃料电池金属双极板 (Metal bipolar plate for proton exchange membrane fuel cell ) 是由 任杰 施忠贵 孟洪亮 张洋 徐小龙 于 2021-08-24 设计创作，主要内容包括：本申请涉及一种用于质子交换膜燃料电池金属双极板,其包括电极组件,所述电极组件包括背部相焊接的阳极板和阴极板,阳极板上设有第一氢气入口和第一氧气入口,阳极板上还设有第一氢气出口和第一氧气出口,阴极板上设有第二氢气入口第二氧气入口,阴极板上还设有第二氢气出口和第二氧气出口,阳极板远离阴极板一侧的中间位置设有第一导流区,第一导流区内设置有蛇形分布的氢气通道,第一氢气入口和第一氢气出口均与氢气通道相连通,阴极板远离阳极板一侧的中间位置设有第二导流区,第二导流区内设置有多条氧气通道,第二氧气入口和第二氧气出口均与氧气通道相连通。本申请具有使氢气和氧气反应的更加充分,提高燃料电池的输出性能的效果。(The application relates to a metal bipolar plate for a proton exchange membrane fuel cell, which comprises an electrode component, the electrode assembly comprises a back-phase welded anode plate and a cathode plate, a first hydrogen inlet and a first oxygen inlet are formed in the anode plate, a first hydrogen outlet and a first oxygen outlet are formed in the anode plate, a second hydrogen inlet and a second oxygen inlet are formed in the cathode plate, a second hydrogen outlet and a second oxygen outlet are formed in the cathode plate, a first flow guide area is arranged at the middle position, away from one side of the cathode plate, of the anode plate, a hydrogen channel distributed in a snake shape is formed in the first flow guide area, the first hydrogen inlet and the first hydrogen outlet are communicated with the hydrogen channel, a second flow guide area is formed in the middle position, away from one side of the anode plate, of the cathode plate, a plurality of oxygen channels are arranged in the second flow guide area, and the second oxygen inlet and the second oxygen outlet are communicated with the oxygen channel. The fuel cell has the advantages that the reaction of hydrogen and oxygen is more sufficient, and the output performance of the fuel cell is improved.)

1. A metal bipolar plate for a proton exchange membrane fuel cell, comprising: the hydrogen-gas separation electrode comprises an electrode assembly (1), wherein the electrode assembly (1) comprises an anode plate (11) and a cathode plate (12) which are welded on the back sides, a first hydrogen inlet (111), a first condensing agent inlet (112) and a first oxygen inlet (113) are arranged on the anode plate (11), a first hydrogen outlet (114), a first condensing agent outlet (115) and a first oxygen outlet (116) are further arranged on the anode plate (11), a second hydrogen inlet (123), a second condensing agent inlet (124) and a second oxygen inlet (125) are arranged on the cathode plate (12), a second hydrogen outlet (126), a second condensing agent outlet (127) and a second oxygen outlet (128) are further arranged on the cathode plate (12), a first flow guide area (2) is arranged at the middle position of one side, far away from the cathode plate (12), of the anode plate (11) and a hydrogen channel (21) distributed in a serpentine shape are arranged in the first flow guide area (2), the first hydrogen inlet (111) and the first hydrogen outlet (114) are communicated with the hydrogen channel (21), a second flow guide area (3) is arranged in the middle of one side, away from the anode plate (11), of the cathode plate (12), a plurality of oxygen channels (31) are arranged in the second flow guide area (3), and the second oxygen inlet (125) and the second oxygen outlet (128) are communicated with the oxygen channels (31).

2. A metal bipolar plate for a pem fuel cell according to claim 1 wherein: the hydrogen channels (21) are distributed in a snake shape along the length direction of the anode plate (11), the oxygen channels (31) are arranged along the length direction of the cathode plate (12), and each oxygen channel (31) is wavy.

3. A metal bipolar plate for a pem fuel cell according to claim 1 wherein: the area of the second oxygen inlet (125) is larger than that of the first hydrogen inlet (111).

4. A metal bipolar plate for a pem fuel cell according to claim 1 wherein: the first hydrogen inlet (111) and the first hydrogen outlet (114) as well as the second oxygen inlet (125) and the second oxygen outlet (128) are all in an isosceles trapezoid shape, the lower bottom edges of the first hydrogen inlet (111) and the first hydrogen outlet (114) face the first flow guide area (2), and the upper bottom edges of the second oxygen inlet (125) and the second oxygen outlet (128) face the second flow guide area (3).

5. A metal bipolar plate for a pem fuel cell according to claim 1 wherein: the negative plate (12) is located and is fixed with a plurality of water conservancy diversion strips (121) below second oxygen entry (125), and a plurality of water conservancy diversion strips (121) set up along the width direction of negative plate (12), one side slope that second oxygen entry (125) was kept away from in water conservancy diversion strip (121) sets up.

6. A metal bipolar plate for a PEM fuel cell according to claim 5 wherein: a plurality of dispersion columns (122) are arranged between the flow guide strips (121) and the oxygen channel (31), and the plurality of dispersion columns (122) are arranged along the width direction of the cathode plate (12).

7. A metal bipolar plate for a pem fuel cell according to claim 1 wherein: the back of the cathode plate (12) and the back of the anode plate (11) form a condensation field (4).

8. A metal bipolar plate for a pem fuel cell according to claim 7 wherein: the back of the anode plate (11) is provided with a first condensation area (41), a plurality of first condensation channels (411) are arranged in the first condensation area (41), each first condensation channel (411) is arranged along the width direction of the anode plate (11), a second condensation area (42) is arranged at the back of the cathode plate (12), a plurality of wavy second condensation channels (421) are arranged in the second condensation area (42), each second condensation guide channel is arranged along the length direction of the cathode plate (12), a plurality of third condensing agent inlets (117) and a plurality of third condensing agent outlets (118) are respectively arranged at two sides of the cathode plate (12) and the anode plate (11) in the length direction, the third condensing agent inlet (117) and the third condensing agent outlet (118) are both communicated with the first condensing channel (411), the second condensing agent inlet (124) and the second condensing agent outlet (127) are communicated with the second condensing channel (421).

Technical Field

The present application relates to the field of fuel cells, and more particularly to a metal bipolar plate for a proton exchange membrane fuel cell.

Background

Proton exchange membrane fuel cells are, in principle, equivalent to "reverse" devices for the electrolysis of water. The fuel cell is composed of a bipolar plate and a proton exchange membrane, wherein the proton exchange membrane is the core of the fuel cell, and the bipolar plate plays roles in collecting current, distributing gas and the like in the fuel cell.

The present chinese utility model patent with the publication number CN203760565U discloses a proton exchange membrane fuel cell metal bipolar plate, which comprises a cathode unipolar plate and an anode unipolar plate made of metal sheets, the back of the cathode unipolar plate is opposite to the back of the anode unipolar plate, the surfaces of the cathode unipolar plate and the anode unipolar plate which are deviated from each other are all provided with a fuel gas cavity, a cooling medium cavity and an oxidant gas cavity which are correspondingly overlapped, the middle parts of the cathode unipolar plate and the anode unipolar plate are all provided with a flow field area, and the flow field area is provided with a plurality of bosses and grooves which are arc-shaped and correspond to each other.

Hydrogen enters the flow field region through the fuel gas cavity, oxygen enters the flow field region through the oxidant gas cavity, and the hydrogen and the oxygen react in the flow field region to generate electrons, so that the fuel cell outputs current.

In view of the above-mentioned related technologies, the inventor believes that the grooves corresponding to the flow field regions of the anode unipolar plate and the cathode unipolar plate have the same structure, and oxygen and hydrogen are diffused in the grooves, but since hydrogen has a diffusion rate higher than that of oxygen, the supply rate of oxygen cannot match that of hydrogen, and a part of hydrogen enters the flow field region and is discharged without reacting, so that the reaction between hydrogen and oxygen is insufficient, and the output performance of the fuel cell is reduced.

Disclosure of Invention

In order to enable the reaction of hydrogen and oxygen to be more complete and improve the output performance of the fuel cell, the application provides a metal bipolar plate for a proton exchange membrane fuel cell.

The application provides a metal bipolar plate for a proton exchange membrane fuel cell, which adopts the following technical scheme:

a metal bipolar plate for a proton exchange membrane fuel cell comprises an electrode assembly, wherein the electrode assembly comprises an anode plate and a cathode plate, the back of the anode plate is welded with the back of the cathode plate, the anode plate is provided with a first hydrogen inlet, a first condensing agent inlet and a first oxygen inlet, the anode plate is also provided with a first hydrogen outlet, a first condensing agent outlet and a first oxygen outlet, the cathode plate is provided with a second hydrogen inlet, a second condensing agent inlet and a second oxygen inlet, the cathode plate is also provided with a second hydrogen outlet, a second condensing agent outlet and a second oxygen outlet, a first flow guide area is arranged at the middle position of one side of the anode plate, which is far away from the cathode plate, a hydrogen channel distributed in a snake shape is arranged in the first flow guide area, the first hydrogen inlet and the first hydrogen outlet are communicated with the hydrogen channel, and a second flow guide area is arranged at the middle position of one side of the cathode plate, which is far away from the anode plate, and a plurality of oxygen channels are arranged in the second diversion area, and the second oxygen inlet and the second oxygen outlet are communicated with the oxygen channels.

Through adopting above-mentioned technical scheme, hydrogen gets into first water conservancy diversion district from first hydrogen entry to along the diffusion of hydrogen passageway, finally discharge at first hydrogen export, oxygen at first passes through first oxygen entry, then gets into second water conservancy diversion district from the second oxygen entry, and along the diffusion of oxygen passageway, finally discharge at the second oxygen export, the hydrogen passageway is snakelike can prolong the diffusion path of hydrogen, makes hydrogen can be abundant react with oxygen, thereby improves fuel cell's output performance.

Optionally, the hydrogen channels are distributed in a serpentine shape along the length direction of the anode plate, the oxygen channels are arranged along the length direction of the cathode plate, and each oxygen channel is wavy.

Through adopting above-mentioned technical scheme, the hydrogen passageway sets up along the width direction of anode plate mostly, and the oxygen passageway sets up along the length direction of cathode plate, and hydrogen passageway and oxygen passageway form the passageway of crisscross distribution to wavy oxygen passageway can prolong the diffusion path of oxygen, oxygen and hydrogen make the area of contact of hydrogen and oxygen bigger when oxygen passageway and hydrogen passageway internal diffusion, react more fully.

Optionally, the area of the second oxygen inlet is larger than the area of the first hydrogen inlet.

By adopting the technical scheme, when the hydrogen and the oxygen react, the content of the required oxygen is greater than that of the hydrogen, so that the area of the second oxygen inlet is greater than that of the first hydrogen inlet, more oxygen can enter and participate in the reaction, and the hydrogen and the oxygen can fully react.

Optionally, the first hydrogen inlet and the first hydrogen outlet, and the second oxygen inlet and the second oxygen outlet are both isosceles trapezoids, lower bottom edges of the first hydrogen inlet and the first hydrogen outlet face the first flow guide region, and upper bottom edges of the second oxygen inlet and the second oxygen outlet face the second flow guide region.

By adopting the technical scheme, the length of the upper bottom edge of the isosceles trapezoid is smaller than that of the lower bottom edge, so that the pressure of hydrogen entering the first hydrogen inlet can be reduced, the rate of hydrogen entering the hydrogen inlet is further slowed down, meanwhile, the pressure of oxygen entering the second oxygen inlet can be increased, and the rate of oxygen entering the second oxygen inlet is enhanced.

Optionally, a plurality of diversion strips are fixed below the second oxygen inlet of the cathode plate, the diversion strips are arranged along the width direction of the cathode plate, and one side of each diversion strip, which is far away from the second oxygen inlet, is obliquely arranged.

Through adopting above-mentioned technical scheme, the second oxygen entry is located one side of negative plate, when oxygen entered from the second oxygen entry, most of oxygen can diffuse to the oxygen passageway that is close to the second oxygen entry, and the oxygen content in the oxygen passageway of keeping away from the second oxygen entry is less, be unfavorable for the reaction of oxygen and hydrogen, through setting up the water conservancy diversion strip, make oxygen get into the second water conservancy diversion district from the second oxygen entry, along the length direction diffusion to near each oxygen passageway of water conservancy diversion strip, be convenient for hydrogen and oxygen fully contact and take place the reaction.

Optionally, a plurality of dispersion columns are arranged between the flow guide strip and the oxygen channel, and the plurality of dispersion columns are arranged along the width direction of the cathode plate.

Through adopting above-mentioned technical scheme, oxygen passes through the water conservancy diversion strip and diffuses near each oxygen passageway, in the dispersion post gets into the oxygen passageway, the dispersion post can disperse oxygen and make the even entering oxygen passageway of oxygen in, the hydrogen of being convenient for and oxygen reaction more abundant.

Optionally, the back of the cathode plate and the back of the anode plate form a condensation field.

By adopting the technical scheme, the reaction heat can be generated by the reaction of the hydrogen and the oxygen, the heat of the reaction is taken away through the condensation field, and the performance of the fuel cell is improved.

Optionally, the back of anode plate is provided with first condensation area, be provided with many first condensation passageways in the first condensation area, every first condensation passageway all sets up along the width direction of anode plate, the back of cathode plate is provided with the second condensation area, be provided with many wavy second condensation passageways in the second condensation area, every the second is led the condensation passageway and all is set up along the length direction of cathode plate, a plurality of third condensing agent entries and a plurality of third condensing agent export have been seted up respectively to the length direction both sides of cathode plate and anode plate, third condensing agent entry and third condensing agent export all are linked together with first condensation passageway, second condensing agent entry and second condensing agent export all are linked together with the second condensation passageway.

By adopting the technical scheme, the condensing agent enters from the first condensing agent inlet and the third condensing agent inlet respectively, is conveyed in the first condensing channel and the second condensing channel, and is discharged from the first condensing agent outlet and the third condensing agent outlet finally.

In summary, the present application includes at least one of the following beneficial technical effects:

1. hydrogen enters the first flow guide area from the hydrogen inlet, diffuses along the hydrogen channel and is finally discharged from the hydrogen outlet, oxygen enters the second flow guide area from the oxygen inlet, diffuses along the oxygen channel and is finally discharged from the oxygen outlet, and the hydrogen channel is snakelike and can prolong the diffusion path of the hydrogen, so that the hydrogen can fully react with the oxygen, and the output performance of the fuel cell is improved;

2. when the hydrogen and the oxygen react, the required oxygen content is greater than that of the hydrogen, so that the area of the second oxygen inlet is greater than that of the first hydrogen inlet, more oxygen can enter and participate in the reaction, and the hydrogen and the oxygen can fully react;

3. the oxygen entry is located one side of negative plate, and when oxygen entered from the oxygen entry, most of oxygen can diffuse to the oxygen passageway that is close to the oxygen entry in, and the oxygen content in the oxygen passageway of keeping away from the oxygen entry is less, is unfavorable for the reaction of oxygen and hydrogen, through setting up the water conservancy diversion strip, makes oxygen from the oxygen entry and then the second water conservancy diversion zone time, diffuses to each oxygen passageway in along the length direction of water conservancy diversion strip, and the hydrogen and the oxygen of being convenient for fully contact and take place the reaction.

Drawings

Fig. 1 is a schematic view showing the structure of an electrode assembly in this embodiment.

Fig. 2 is a schematic structural diagram of the anode plate in the present embodiment.

Fig. 3 is a schematic structural view of the integrated cathode plate in this embodiment.

Fig. 4 is a schematic structural view showing the first condensation zone and the first condensation passage in the present embodiment.

Fig. 5 is a schematic structural view embodying the second condensation zone and the second condensation passage in the present embodiment.

Description of reference numerals: 1. an electrode assembly; 11. an anode plate; 111. a first hydrogen inlet; 112. a first refrigerant inlet; 113. a first oxygen inlet; 114. a first hydrogen outlet; 115. a first refrigerant outlet; 116. an oxygen outlet; 117. a third condensing agent inlet; 118. a third condensing agent outlet; 12. a cathode plate; 121. a flow guide strip; 122. a dispersion column; 123. a second hydrogen inlet; 124. a second condensing agent inlet; 125. a second oxygen inlet; 126. a second hydrogen outlet; 127. a second refrigerant outlet; 128. a second oxygen outlet; 2. a first flow guide area; 21. a hydrogen gas passage; 3. a second flow guide zone; 31. an oxygen channel; 4. a condensation field; 41. a first condensation zone; 411. a first condensing passage; 42. a second condensation zone; 421. a second condensing passage.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a metal bipolar plate for a proton exchange membrane fuel cell. Referring to fig. 1, the metal bipolar plate includes an electrode assembly 1, the electrode assembly 1 includes a set of anode and cathode plates 11 and 12 welded at the back, the anode and cathode plates 11 and 12 each have a rectangular shape, and the anode and cathode plates 11 and 12 are made of a metal sheet. A first hydrogen inlet 111, a first condensing agent inlet 112 and a first oxygen inlet 113 are formed on one side of the anode plate 11, the first hydrogen inlet 111, the first condensing agent inlet 112 and the first oxygen inlet 113 are formed along the width direction of the anode plate 1, and a second hydrogen inlet 123, a second condensing agent inlet 124 and a second oxygen inlet 125 are formed on the cathode plate 12 at positions corresponding to the anode plate 11. A first hydrogen outlet 114, a first condensing agent outlet 115 and a first oxygen outlet 116 are opened through the anode plate 11 at a side opposite to the first hydrogen inlet 111, the first condensing agent inlet 112 and the first oxygen inlet 113, and a second hydrogen outlet 126, a second condensing agent outlet 127 and a second oxygen outlet 128 are opened through the cathode plate 12 at a position corresponding to the anode plate 11.

When the back of the anode plate 11 is buckled with the back of the cathode plate 12, the first hydrogen inlet 111 and the second hydrogen inlet 123 are corresponding to and communicated with each other, the first condensing agent inlet 112 and the second condensing agent inlet 124 are corresponding to and communicated with each other, the first oxygen inlet 113 and the second oxygen inlet 125 are corresponding to and communicated with each other, the first hydrogen outlet 114 and the second hydrogen outlet 126 are corresponding to and communicated with each other, the first condensing agent outlet 115 and the second condensing agent outlet 127 are corresponding to and communicated with each other, and the first oxygen outlet 116 and the second oxygen outlet 128 are corresponding to and communicated with each other.

Referring to fig. 2, a first flow guiding area 2 is disposed at a middle position of the anode plate 11, a hydrogen channel 21 is disposed in the first flow guiding area 2, the hydrogen channel 21 is distributed in a serpentine shape along a length direction of the anode plate 11, a first hydrogen inlet 111 and a first hydrogen outlet 114 are both communicated with the hydrogen channel 21, and the first flow guiding area 2 and the hydrogen channel 21 are both formed by stamping. The hydrogen enters the hydrogen channel 21 through the first hydrogen inlet 11 and diffuses in the first flow guide area 2 along the hydrogen channel 21, and since the diffusion rate of the hydrogen is greater than that of the oxygen, the serpentine hydrogen channel 21 is used for prolonging the diffusion path of the hydrogen, so that the hydrogen can stay in the first flow guide area 2 for a longer time, and the possibility that the hydrogen is discharged from the first hydrogen outlet 114 without reacting with the oxygen is reduced, so that the hydrogen and the oxygen react more fully, and the output performance of the fuel cell is improved.

Referring to fig. 3, a second flow guiding area 3 is disposed at the middle position of the cathode plate 12, a plurality of parallel oxygen channels 31 are disposed in the second flow guiding area 3, each oxygen channel 31 is disposed along the length direction of the cathode plate 12, the oxygen channels 31 are wavy, the second oxygen inlet 125 and the second oxygen outlet 128 are both communicated with the oxygen channels 31, and the second flow guiding area 3 and the oxygen channels 31 are both formed by punching. The oxygen firstly passes through the first oxygen inlet 113, then enters the second flow guiding area 3 from the second oxygen inlet 125, and is diffused along the oxygen channel 31, and the wavy oxygen channel 31 can prolong the oxygen diffusion path and increase the residence time of the oxygen in the oxygen channel 31. Since the hydrogen channels 21 are mostly arranged in the width direction of the anode plate 12 and the oxygen channels 31 are arranged along the length of the cathode plate 11, the contact area of hydrogen and oxygen can be increased, and the reaction of oxygen and hydrogen can be more sufficient. And the oxygen channel 31 on the cathode plate 12 is relatively short, so the water generated on the cathode plate 12 can be rapidly discharged in the oxygen channel 31, the influence of the water on the reaction of the hydrogen and the oxygen is reduced, and the performance of the fuel cell is improved.

Referring to fig. 1 and 4, a plurality of electrode assemblies 1 constitute a pem fuel cell, and anode plates 11 and cathode plates 12 of adjacent electrode assemblies 1 correspond, with a pem interposed between adjacent electrode assemblies 1. A condensation field 4 is formed between an anode plate 11 and a cathode plate 12 in the electrode assembly 1, the condensing agent flows in the condensation field 4, certain reaction heat can be generated in the process of generating electrons through the reaction of hydrogen and oxygen, and the condensing field 4 is arranged, so that the condensing agent can exchange heat with the reaction heat, the heat in the reaction is taken away, and the surface temperature of the proton exchange membrane is uniformly distributed.

The middle of the back of the anode plate 11 is provided with a first condensation area 41, a plurality of parallel first condensation channels 411 are arranged in the first condensation area 41, each first condensation channel 411 is arranged along the width direction of the anode plate 11, and the first condensation area 41 and the first condensation channels 411 are formed by punching.

Referring to fig. 5, the structure of the back of the cathode plate 12 is completely the same as that of the back of the cathode plate 12, a second condensation area 42 is formed at the middle position of the back of the cathode plate 12, a plurality of second condensation channels 421 are formed in the second condensation area 42, a plurality of third condensing agent inlets 117 are formed at one sides of the anode plate 11 and the cathode plate 12 along the length direction, a plurality of third condensing agent outlets 118 are further formed at the cathode plate 12 and the anode plate 11, the third condensing agent outlets 118 are located at the opposite side of the third condensing agent inlets 117, and the third condensing agent inlets 117 and the third condensing agent outlets 118 are both communicated with the second condensation channels 421.

Referring to fig. 4 and 5, when the anode plate 11 and the cathode plate 12 are fastened, the first condensation channel 411 and the second condensation channel 421 are alternately distributed to form a grid shape, and when the condensing agent enters from the first condensing agent inlet 112 and the third condensing agent inlet 117, the condensing agent can be distributed on each part of the cathode plate 12 and the anode plate 11, so that the condensing effect of the condensing agent can be improved.

Referring to fig. 2 and 3, the first hydrogen inlet 111 and the first hydrogen outlet 114 are both isosceles trapezoids, the lower bases of the first hydrogen inlet 111 and the first hydrogen outlet 114 are both disposed toward the first flow guiding region 2, and since the width of the lower base is greater than that of the upper base, the pressure of hydrogen entering the first hydrogen inlet 111 can be reduced, thereby slowing down the rate of hydrogen entering the hydrogen passage 21. The second oxygen inlet 125 and the second oxygen outlet 128 are also in the shape of an isosceles trapezoid, and the upper bottom edges of the second oxygen inlet 125 and the second oxygen outlet 128 are both arranged towards the second flow guiding area 3, so that the pressure of oxygen entering the second oxygen inlet 125 can be increased, and the rate of oxygen entering the oxygen channel 31 can be increased. The area of the first oxygen inlet 113 and the first oxygen outlet 116 is larger than that of the first hydrogen inlet 111 and the first hydrogen outlet 114, and since the required amount of oxygen is larger than that of hydrogen when hydrogen and oxygen react, more oxygen is allowed to enter the oxygen channel 31, facilitating the sufficient reaction of hydrogen and oxygen.

Referring to fig. 3, a plurality of guide strips 121 are fixedly connected to the cathode plate 12 below the second oxygen inlet 125, and the guide strips 121 close to the second condensing agent inlet 124 are obliquely arranged, since the second oxygen inlet 124 is located at one side of the cathode plate 12, when entering the oxygen channel 31 from the second oxygen inlet 125, most of the oxygen may enter along the oxygen channel 31 below the second oxygen inlet 125, and the oxygen content in the oxygen channel 31 far away from the second oxygen inlet 125 is less, resulting in insufficient reaction between the hydrogen and the oxygen, and by arranging the guide strips 121, the oxygen is diffused along the length direction of the guide strips 121, and the oxygen is dispersed to the vicinity of each oxygen channel 31.

A plurality of dispersion columns 122 are fixedly connected between the flow guide strips 121 and the oxygen channel 31, and the plurality of dispersion columns 122 are arranged along the width direction of the cathode plate 12, when oxygen enters from the second oxygen inlet 125, the oxygen firstly disperses to the second flow guide zone 3 through the flow guide strips 121, and then enters the oxygen channel 31 from between the dispersion columns 122, and under the action of the dispersion columns 122, the oxygen can uniformly enter the oxygen channel 31, so that the reaction of the hydrogen and the oxygen is more sufficient.

The implementation principle of the metal bipolar plate for the proton exchange membrane fuel cell in the embodiment of the application is as follows:

the hydrogen gas enters the first flow guiding region 2 from the first hydrogen inlet 111, diffuses in the first flow guiding region 2 along the hydrogen channel 21, and is finally discharged at the second hydrogen outlet 114. .

The oxygen firstly passes through the first oxygen inlet 113, then enters the second diversion area 3 from the second oxygen inlet 125, then expands to the vicinity of each oxygen channel 31 through the diversion strips 121, and under the action of the dispersion columns 122, the oxygen uniformly enters each hydrogen channel 21, and finally is discharged at the second oxygen outlet 128.

The hydrogen and oxygen gases diffuse in the hydrogen passage 21 and the oxygen passage 31, respectively, and the hydrogen and oxygen gases come into contact and react.

The condensing agent enters the first condensing area 41 and the second condensing area 42 from the first condensing agent inlet 112 and the third condensing agent inlet 117, and is finally discharged from the first condensing agent outlet 115 and the third condensing agent outlet 118, and the condensing agent can carry away hydrogen and oxygen to generate reaction heat during reaction when being conveyed in the first condensing channel 411 and the second condensing channel 421, so that the conveying performance of the fuel cell is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.