CN218918962U - Polar plate and single cell - Google Patents

Abstract

The utility model discloses a polar plate and a single cell, wherein the polar plate comprises: the cooling device comprises two manifold port areas, a distribution area, a reaction area and a guide runner, wherein the two manifold port areas are arranged at two ends of the polar plate in the length direction, the manifold port areas comprise cooling medium manifold ports, the distribution area is arranged between the two manifold port areas, a blank area is arranged between the distribution area and the manifold port areas, the reaction area is arranged between the two distribution areas, the reaction area is provided with the cooling runner, the guide runner is arranged on the blank area, one end of the guide runner is communicated with the cooling medium manifold port, the other end of the guide runner is communicated with the cooling runner, the guide runner is defined by a guide piece, and the guide piece is formed by injection molding. Therefore, the processing difficulty of the guide piece is low, the processing cost can be reduced, the uniform distribution of the cooling medium is realized, the guide piece cannot influence the sealing effect of the sealing structure on one side of the pole plate back away from the guide piece, the avoidance of the sealing structure is not needed, the guide piece can be arranged longer, and the uniform distribution effect of the cooling medium can be effectively improved.

Description

Polar plate and single cell

Technical Field

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

Background

The anode plate of the single cell and manifold port areas at two ends of the cathode plate are provided with cathode manifold ports through which cathode gas flows, anode manifold ports through which anode gas flows and cooling medium manifold ports through which cooling medium flows, the cooling medium can cool the single cell when the single cell generates heat, the cooling medium freely flows from the cooling medium manifold ports to a cooling flow channel in the process of flowing from the cooling medium manifold ports to a blank area between the manifold port area and a distribution area, the cooling medium is difficult to uniformly distribute to all parts of the single cell, the local hot spots of the single cell can be caused by uneven distribution of the cooling medium, and the power generation performance of the single cell can be reduced.

In the related art, the cooling medium is guided by stamping the guiding structure on the blank area of the anode plate or the cathode plate, but based on the sealing requirement of the single cell, the sealing structure is required to be arranged on the back side of the blank area (namely between the anode plate and the membrane electrode assembly and between the cathode plate and the membrane electrode assembly), and the guiding piece is required to avoid the area where the sealing structure is located so as to avoid the sealing failure of the sealing structure caused by the guiding piece, so that the space of the area where the guiding piece is arranged is limited, the cooling medium cannot be effectively guided, and the cooling medium is difficult to uniformly distribute.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the polar plate, and the cooling medium on the polar plate is more uniformly distributed and has better cooling effect.

The utility model also provides a single cell.

According to an embodiment of the present application, a polar plate includes: the cooling device comprises a pole plate, and is characterized in that two manifold port areas, a distribution area, a reaction area and a guide runner are arranged at two ends of the pole plate in the length direction, the manifold port areas comprise cooling medium manifold ports, the distribution area is positioned between the two manifold port areas, a blank area is arranged between the distribution area and the manifold port areas, the reaction area is positioned between the two distribution areas, the reaction area is provided with the cooling runner, the guide runner is arranged on the blank area, one end of the guide runner is communicated with the cooling medium manifold ports, the other end of the guide runner is communicated with the cooling runner, the guide runner is defined by a guide piece, and the guide piece is formed by injection molding.

According to the polar plate of this application embodiment, through setting up alone and injection moulding's water conservancy diversion spare, on the one hand, the processing degree of difficulty of water conservancy diversion spare is low, can reduce processing cost, and preliminary realization cooling medium's evenly distributed, more importantly, the water conservancy diversion spare can not lead to the fact the influence to the sealing effect of the sealing structure of polar plate back from water conservancy diversion spare one side, need not to dodge sealing structure, makes the longer that the water conservancy diversion spare can set up, can effectively improve cooling medium's evenly distributed effect.

In some embodiments, the side of the cooling medium manifold port facing the guide flow channel comprises a first rounded corner and a second rounded corner at two ends, and a straight edge connected with the first rounded corner and the second rounded corner respectively; the flow guide member includes: a first reference guide member, a second reference guide member, and a third reference guide member, wherein,

an axis of at least a portion of the first reference baffle proximate the coolant manifold port coincides with the first rounded bisector;

an axis of at least a portion of the second reference baffle proximate the coolant manifold aperture coincides with a midline of the straight edge;

an axis of at least a portion of the third datum guide proximate the coolant manifold port coincides with the second rounded bisector.

Further, the flow guide member further includes: a plurality of sub-guide pieces are arranged between the first reference guide piece and the second reference guide piece and between the second reference guide piece and the third reference guide piece.

In some embodiments, further comprising: the sealing piece is arranged outside the cooling medium manifold port, the blank area, the distribution area and the reaction area in a surrounding mode, and the communication piece is located at one end of the flow guiding piece in the height direction and used for connecting the flow guiding piece with the sealing piece.

Specifically, the communicating member includes first communicating member and second communicating member, the one end of first communicating member with be located cooling medium manifold mouth one side sealing member is connected, and is used for with first benchmark water conservancy diversion spare, second benchmark water conservancy diversion spare, the one end and the a plurality of sub-water conservancy diversion spare of third benchmark water conservancy diversion spare connect gradually, the second communicating member is used for with the other end of third benchmark water conservancy diversion spare with be located cooling medium manifold mouth opposite side sealing member is connected.

Further, the widths of the first communicating piece and the second communicating piece are larger than 2mm, and the widths of the first reference flow guiding piece, the second reference flow guiding piece, the third reference flow guiding piece and the sub-flow guiding piece are 2mm-4mm.

Further, the seal member has a first fillet relief opposite the anode manifold port, a second fillet relief opposite the cathode manifold port, and a third reference deflector is disposed opposite and concentric with the first fillet relief to define a merge region.

Further, the height of the flow guide member is larger than the height of the communicating member, and the cross-sectional area of the end portion of the communicating member in the height direction is gradually reduced.

Further, the flow guide member is configured as a rubber member and is integrally formed with the sealing member.

A single cell according to an embodiment of the second aspect of the present application includes: the cathode plate and/or the anode plate are/is the electrode plates in the above embodiment, and the membrane electrode assembly is disposed between the cathode plate and the anode plate.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic structural view of a pole plate according to an embodiment of the present application;

fig. 2 is a schematic structural view of a single cell according to an embodiment of the present application;

FIG. 3 is a schematic illustration of plate area division according to an embodiment of the present application;

fig. 4 is a schematic view of a baffle according to an embodiment of the present application.

Reference numerals:

the unit cells 100 are formed in a single-cell structure,

a cathode plate 10, a cathode flow channel 11,

an anode plate 20, an anode flow channel 21,

the membrane electrode assembly 30 is provided with a plurality of electrodes,

a deflector 40, a first reference deflector 41, a second reference deflector 42, a third reference deflector 43, a sub-deflector 44, a junction region 45,

a manifold port region 50, a coolant manifold port 51, a cathode manifold port 52, an anode manifold port 53,

distribution zone 60, reaction zone 70, first communication member 81, second communication member 82, sealing member 90, first fillet relief 91, second fillet relief 92.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

A plate and a cell 1000 according to an embodiment of the present application are described below with reference to fig. 1-4.

As shown in fig. 1 and 2, a polar plate according to an embodiment of the present application includes: two manifold port regions 50, a distribution region 60, a reaction region 70 and a guide flow channel at both ends in the plate length direction.

The electrode plate may be a cathode plate 10 or an anode plate 20, two manifold port regions 50 are arranged at two ends of the length direction of the electrode plate, the manifold port regions 50 comprise cooling medium manifold ports 51, a distribution region 60 is arranged between the two manifold port regions 50, a blank region is arranged between the distribution region 60 and the manifold port regions 50, a reaction region 70 is arranged between the two distribution regions 60, a cooling runner is arranged on the reaction region 70, a guide runner is arranged on the blank region, one end of the guide runner is communicated with the cooling medium manifold ports 51, the other end of the guide runner is communicated with the cooling runner, the guide runner is defined by a guide piece 40, and the guide piece 40 is formed by injection molding.

Specifically, in the working process of the polar plate, the cooling medium enters from the cooling medium manifold port 51 at one end and flows through the guide flow passage at one end, the cooling flow passage at the other end and the guide flow passage at the other end in sequence, and then flows out from the cooling medium manifold port 51 at the other end, so that the cooling effect on the polar plate is realized, and the cooling effect of the single cell 100 adopting the polar plate in the embodiment of the application is effectively reduced.

Furthermore, the guide members 40 are made to be injection molded, a guide flow channel is defined between the adjacent guide members 40, the cost of the guide members 40 formed by injection molding alone is lower, in addition, the guide structures do not need to be stamped on the polar plates to form, the sealing structures between the polar plates and the membrane electrode assemblies 30 do not need to be avoided on the premise of realizing uniform distribution of cooling media, the sealing structures between the polar plates and the membrane electrode assemblies 30 do not lose efficacy, the sealing performance is improved, the guide members 40 can be arranged longer, and the uniform distribution effect of the cooling media can be further improved.

According to the polar plate of this application embodiment, through setting up alone and injection moulding's water conservancy diversion spare 40, on the one hand, the processing degree of difficulty of water conservancy diversion spare 40 is low, can reduce processing cost, and preliminary realization cooling medium's evenly distributed, more importantly, water conservancy diversion spare 40 can not lead to the fact the influence to the sealing effect of the sealing structure of polar plate back from water conservancy diversion spare 40 one side, need not to dodge sealing structure, makes the longer that water conservancy diversion spare 40 can set up, can effectively improve cooling medium's evenly distributed effect.

According to some embodiments of the present application, the side of the cooling medium manifold port 51 facing the guide flow passage includes a first rounded corner and a second rounded corner at both ends, and straight sides connected to the first rounded corner and the second rounded corner, respectively, and the flow guide 40 includes: the first reference guide 41, the second reference guide 42, and the third reference guide 43, wherein an axis of at least a portion of the first reference guide 41 near the cooling medium manifold port 51 coincides with the first rounded bisector, an axis of at least a portion of the second reference guide 42 near the cooling medium manifold port 51 coincides with a center line of the straight edge, and an axis of at least a portion of the third reference guide 43 near the cooling medium manifold port 51 coincides with the second rounded bisector.

Specifically, the cathode plate 10 defines a cathode flow channel 11 protruding towards a direction away from the membrane electrode assembly 30, the anode plate 20 defines an anode flow channel 21 protruding towards a direction away from the membrane electrode assembly 30, the anode plates 10 of two adjacent single cells 100 are attached to the cathode plate 20, a cooling flow channel is defined between the outer wall surfaces of the anode flow channel 11 and the cathode flow channel 12, one end of the cooling flow channel in the length direction is opposite to the inner side edge (namely, the side edge facing the guiding flow channel) of the cooling medium manifold port 51 at one end in the length direction, the other end of the cooling flow channel in the length direction is opposite to the inner side edge (namely, the side edge facing the guiding flow channel) of the cooling medium manifold port 51 at the other end in the length direction, so that the cooling medium manifold ports 51 at the two ends are defined as cooling inlets and cooling outlets to form a complete cooling medium circulation path, and a round corner structure is arranged on the cooling inlets and the cooling outlets, so that the flow stability of the cooling medium can be improved, the turbulence phenomenon is avoided, and the uniformity of the cooling medium can be improved.

The first reference flow guiding element 41, the second reference flow guiding element 42 and the third reference flow guiding element 43 are arranged at intervals, the second reference flow guiding element 42 is located between the first reference flow guiding element 41 and the third reference flow guiding element 43, the cooling medium manifold port 51 is constructed in a rounded rectangular structure, and both ends of the inner side edge of the cooling medium manifold port 51 in the width direction are rounded transitions to define a first rounded corner and a second rounded corner.

Therefore, three reference flow guide members are defined first, and the cooling medium flowing into the blank area can be generally limited to flow towards one side area of the distribution area 60 in the width direction, the middle area of the distribution area 60 and the other side area of the distribution area 60 in the width direction according to the arrangement positions of the three reference flow guide members, so that preliminary distribution of the cooling medium is realized, the uniformity of the cooling medium in the distribution area 60 and the reaction area 70 is improved, and the heat dissipation effect is improved.

It should be noted that the two ends of the three reference guides in the length direction may be defined as one end close to the cooling medium manifold port 51 and the other end far from the cooling medium manifold port 51, and at least part of the axis of the one end close to the cooling medium manifold port 51 may coincide with the corresponding first rounded bisector, second rounded bisector, or a center line, while the axis of the other end is not particularly limited, and may coincide with the corresponding first rounded bisector, second rounded bisector, or a center line, or may not coincide.

As shown in fig. 3 and 4, the flow guide 40 further includes: a plurality of sub-guides 44 are provided between the first reference guide 41 and the second reference guide 42, and between the second reference guide 42 and the third reference guide 43.

That is, the plurality of sub-guides 44 are disposed with reference to the first, second and third reference guides 41, 42 and 43, the plurality of sub-guides 44 are spaced apart at the gaps of the three reference guides 40, and the plurality of guides 40 are arranged so as to further distribute the plurality of cooling medium flows primarily distributed by the reference guides, so that the guides 40 have better fluid distribution, and the cooling medium can be uniformly distributed in the cooling flow passage.

Preferably, the plurality of sub-guides 44 may be equally spaced between adjacent reference guides.

The cooling medium manifold mouth 51 is arranged at the edge of the short side (edge in the width direction) of the polar plate, the cooling medium manifold mouth 51 is an inlet and an outlet of the cooling medium, the cooling medium enters the cooling flow passage from the cooling medium manifold mouth 51 at one end, the cooling medium is discharged from the cooling flow passage from the cooling medium manifold mouth 51 at the other end, a plurality of flow guide pieces 40 are arranged at the blank area close to the inner edge of the cooling medium manifold mouth 51, the plurality of flow guide pieces 40 are arranged in different directions around the inner edge of the cooling medium manifold mouth 51, and thus, the cooling medium can be guided in different directions, so that the cooling medium can correspondingly flow into different cooling flow passages and be uniformly distributed in a plurality of cooling flow passages. The flow guiding member 40 may have various structures such as rectangle, rectangle-like, circular, etc., and may be set according to requirements without limitation.

As shown in fig. 4, further, the electrode plate further includes: a seal member 90 and a communication member, the seal member 90 being disposed around the cooling medium manifold port 51, the blank area, the distribution area 60, and the reaction area 70, the communication member being located at one end of the flow guide member 40 in the height direction and being used to connect the flow guide member 40 with the seal member 90.

Wherein, can avoid coolant to spill over through sealing member 90 with coolant and external spaced apart, improve single cell 100's job stabilization nature, the connecting piece is connected guide member 40 and sealing member 90, makes sealing member 90, connecting piece and guide member 40 link to each other, and the one shot of three injection moulding of being convenient for can improve the processing convenience, improves machining efficiency.

The longitudinal direction, the height direction and the width direction according to the present application are based on the electrode plate, that is, the defined longitudinal direction, the defined height direction and the defined width direction correspond to the longitudinal direction, the defined width direction and the defined width direction of the electrode plate.

It should be noted that the end of the communicating member located in the height direction of the flow guiding member 40 means that, in the embodiment in which the flow guiding member 40 is provided on the anode plate 20, the communicating member is located on the side of the flow guiding member 40 facing the anode plate 20 in the height direction; in embodiments in which the baffle 40 is disposed on the cathode plate 10, the communicating member is located on a side of the baffle 40 that faces the cathode plate 10 in the height direction.

As shown in fig. 2 and 3, the communication members include a first communication member 81 and a second communication member 82, one end of the first communication member 81 is connected to a sealing member 90 located on one side of the coolant manifold port 51 (on the side of the coolant manifold port 51 adjacent to the cathode manifold port 52), and is used to sequentially connect the first reference guide 41, the second reference guide 42, one end of the third reference guide 43, and the plurality of sub-guides 44, and the second communication member 82 is used to connect the other end of the third reference guide 43 to a sealing member 90 located on the other side of the coolant manifold port 51 (on the side of the coolant manifold port 51 adjacent to the anode manifold port 53).

That is, the plurality of sub-guides 44, three reference guides, and the portion of the seal 90 between the coolant manifold port 51 and the cathode manifold port 52 may be connected by the first communication member 81, while the second communication member 82 connects the other end of the third reference guide 43, which is long, and the portion of the seal 90 between the coolant manifold port 51 and the anode manifold port 53, so that the communication member and the seal 90 are configured as a closed loop, improving the integrity of the guide 40.

Specifically, the widths of the first communication member 81 and the second communication member 82 are all greater than 2mm, and the widths of the first reference guide member 41, the second reference guide member 42, the third reference guide member 43 and the sub-guide member 44 are 2mm to 4mm, so that the connection between the communication members and the guide member 40 is facilitated.

As shown in fig. 2 and 3, the seal 90 has a first fillet relief 91 opposite the anode manifold port 53, a second fillet relief 92 opposite the cathode manifold port 52, and the third reference deflector 43 is disposed opposite and concentric with the first fillet relief 91 to define the merge region 45.

The area of the blank area on the side of the second fillet avoidance portion 92 is small, the distribution distance for distributing the cooling medium to the cooling outlet is short, the distribution is uniform, and the blank area on the side of the first fillet avoidance portion 91 is large, so that the third reference guide member 43 is designed into a strip shape, and is designed into a concentric fillet with the first fillet avoidance portion 91, and a converging area 45 is defined between the first fillet avoidance portion 91 and the third reference guide member 43, so that the cooling medium in the blank area on the side of the first fillet avoidance portion 91 can also uniformly flow.

As shown in fig. 4, specifically, one end of the third reference guide 43 is connected to the first communication member 81, and the other end of the third reference guide 43 is bent outward and connected to the second communication member 82.

Further, the height of the flow guide 40 is greater than the height of the communicating member, and the cross-sectional area of the end portion of the communicating member in the height direction is gradually reduced.

Specifically, both ends of the communicating member in the plate height direction are rounded, that is, the communicating member is disposed between one cathode plate 10 and one anode plate 20 that are disposed in a fitted state, and when the communicating member is disposed on the cathode plate 10, it extends toward the anode plate 20 that is disposed in a fitted state, and the cross-sectional area of both ends in the extending direction is gradually reduced (that is, the ends in the height direction); when the communicating member is arranged on the anode plate 20, the communicating member extends towards the corresponding cathode plate 10, the cross sectional area of two ends in the extending direction is gradually reduced, so that the communicating member forms a draft angle larger than 60 degrees, the communicating member is arranged in such a structure, so that the communicating member can be integrally formed with the sealing member 90, and is convenient for demolding, the sealing member 90 can be prevented from being influenced, the end part of the communicating member is in a rounded structure with the end part of the communicating member in a cooling flow channel defined by the cathode plate 10, the height of the guiding member 40 is larger than that of the communicating member, the cooling medium can be prevented from being blocked, and the smooth flow of the cooling medium in the cooling flow channel between the two single cells 100 can be ensured.

Further, the flow guide 40 is constructed as a rubber member and is integrally formed with the sealing member 90. The guide member 40 is connected with the sealing member 90 through the communicating member, and can be manufactured by adopting a rubber injection molding mode, and all structures are connected in the injection molding process, so that all structures can be injection molded at one time, the manufacturing mode is simpler, and the manufacturing precision is higher.

It should be noted that the height of the flow guide 40 in the natural state is greater than the height of the interval between the cathode plate 10 and the anode plate 20, which are attached to each other between the adjacent unit cells 100; or the thickness of the sealing member 90 is consistent, so that the flow guide member 40 constructed as a rubber member can be deformed by 5% -10% in the thickness direction during the compression packaging process, thereby preventing shaking and improving the flow guide effect.

As shown in fig. 2, a single cell 100 according to an embodiment of the present application includes: the cathode plate 10, the anode plate 20, and the membrane electrode assembly 30, the cathode plate 10 and/or the anode plate 20 being the electrode plates in the above embodiments, the membrane electrode assembly 30 being disposed between the cathode plate 10 and the anode plate 20.

Specifically, the membrane electrode assembly 30 is disposed between the cathode plate 10 and the anode plate 20, and the cathode plate 10 and the anode plate 20 each include: the two manifold port regions 50 at both ends in the length direction of the unit cell 100, the distribution region 60 between the two manifold port regions 50, the reaction region 70 between the two distribution regions 60, the manifold port region 50 and the distribution region 60 having a blank region therebetween, the cooling medium manifold port 51 of the manifold port region 50 at one end being formed as a cooling inlet, the cooling medium manifold port 51 of the manifold port region 50 at the other end being formed as a cooling outlet, the reaction region 70 having a cooling flow path thereon, the flow guide 40 being disposed on the blank region of the cathode plate 10 and/or the anode plate 20 to form a guide flow path between the cooling medium manifold port 51 and the cooling flow path.

Specifically, both ends in the length direction of the electrode plate are provided with a manifold port area 50, one end of the manifold port area 50 is used for flowing in hydrogen, oxygen or air and a cooling medium, the other end of the manifold port area 50 is used for flowing out hydrogen, oxygen or air and a cooling medium, each manifold port area 50 is internally provided with a cathode manifold port 52, an anode manifold port 53 and a cooling medium manifold port 51 therebetween, the cathode manifold ports 52 are used for flowing in oxygen or air, the cathode flow channels 11 of the cathode plate 10 are communicated with the two cathode manifold ports 52 at both ends so that oxygen or air flows in from the cathode manifold ports 52 at one end and flows out from the cathode manifold ports 52 at the other end, oxygen or air is uniformly distributed in the cathode flow channels 11, the anode manifold ports 53 are used for flowing in hydrogen from the anode flow channels 21 of the anode plate 20 and the two anode manifold ports 53 at both ends, so that hydrogen flows out from the anode manifold ports 53 at the other end, and the plurality of single cells 100 are sequentially stacked, the anode manifold ports 50 at both ends of the single cells 100 are communicated, so that oxygen or air flows in from the two manifold ports 52 at both ends, the anode manifold ports 50 at both ends can be supplied with oxygen and an electron current in the membrane assembly 30, and the two electron current can be moved in the membrane assembly to generate and generate a water and an electron current reaction.

Further, the plurality of unit cells 100 are stacked, that is, the cathode plate 10 of one unit cell 100 is attached to the anode plate 20 of another unit cell 100, so that the plurality of unit cells 100 are stacked in sequence according to the rule, and thus, cooling channels are defined between adjacent anode channels 21 on the anode plate 20 and between adjacent cathode channels 11 on the cathode plate 10, and a plurality of cooling channels are defined between the cathode channel 11 of one of the adjacent unit cells 100 and the outer wall surface of the anode channel 21 of the other unit cell, the cooling medium manifold port 51 at one end is formed as a cooling inlet, the cooling medium manifold port 51 at the other end is formed as a cooling outlet, both ends of the cooling channels are respectively formed as a liquid inlet and a liquid outlet, and the cooling medium can flow out into the cooling channels from the cooling inlet, flow out into the guiding channels at the other end from the liquid outlet, and be discharged from the cooling outlet.

Furthermore, a guide flow channel is arranged in the blank area, one end of the guide flow channel extends to the cooling inlet or the cooling outlet, the other end of the guide flow channel correspondingly extends to the liquid inlet or the liquid outlet, a plurality of guide flow channels are divided in the blank area, and each guide flow channel is correspondingly communicated with one cooling flow channel so as to realize uniform supply of cooling medium.

Specifically, as shown in fig. 3, the cathode plate 10 and the anode plate 20 are divided into a plurality of regions including: the manifold mouth region 50, the distribution region 60 and the reaction region 70, the manifold mouth region 50 is located at two ends of the cathode plate 10 and the anode plate 20, a plurality of manifold mouths are sequentially distributed in the width direction of the single cells 100, the manifold mouth region 50, the distribution region 60 and the reaction region 70 are sequentially distributed in the length direction of the single cells 100, a plurality of single cells 100 are sequentially overlapped in the height direction, a gap between the manifold mouth region 50 and the distribution region 60 is a blank region, the blank region is provided with the flow guide piece 40, a solid part of the flow guide piece 40 can be opposite to the anode flow channel 21 and/or the cathode flow channel 11, and a guide flow channel defined between the adjacent flow guide pieces 40 realizes the flow guide of the cooling medium, so that the cooling medium is uniformly distributed in the plurality of cooling flow channels.

It should be noted that, the guide member 40 is disposed on the blank area of the cathode plate 10 and/or the anode plate 20, the guide member 40 may be disposed on the blank area of the cathode plate 10 or the blank area of the anode plate 20, or both the guide member 40 may be disposed on the blank area, preferably, the guide member 40 is disposed on the plate with the larger blank area compared with the size of the blank area on the cathode plate 10 and the anode plate 20, and the guide member 40 may not be disposed on the plate with the smaller blank area, and the blank area is still in a plate structure, so as to improve the sealing performance of the single cell 100.

More importantly, the guide piece 40 is detachably arranged on the anode plate 20 and/or the cathode plate 10, a guide structure is not required to be punched on the anode plate 20 or the cathode plate 10, the guide piece 40 is arranged on the premise of realizing uniform distribution of cooling media, avoiding of a sealing structure is not required, the sealing structure between the anode plate 20 and the membrane electrode assembly 30 and between the cathode plate 10 and the membrane electrode assembly 30 is not required to be invalid, sealing performance is improved, meanwhile, the guide piece 40 can be arranged longer, and the uniform distribution effect of the cooling media can be further improved.

According to the single cell 100 of the embodiment of the application, by arranging the guide runner with one end communicated with the cooling inlet and the other end communicated with the cooling outlet in the blank area of the cathode plate 10 and/or the anode plate 20, and injection molding the guide piece 40 instead of directly punching the polar plate, on one hand, the guide piece 40 can not influence the sealing effect of the sealing structure between the anode plate 20 and the membrane electrode assembly 30 and between the cathode plate 10 and the membrane electrode assembly 30, so that the sealing performance of the single cell 100 can be improved; on the other hand, the length of the flow guiding member 40 can be longer, so that the cooling medium can be uniformly distributed in a plurality of cooling flow channels of the single cell 100, the temperature of the whole parts of the membrane electrode assembly 30 can be reduced, the generation of local hot spots of the single cell 100 can be avoided, the service life of the membrane electrode assembly 30 can be prolonged, and the power generation performance of the single cell 100 can be improved.

In the description of the present application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like indicate an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present application. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A pole plate, comprising:

two manifold port regions (50) at both ends in the longitudinal direction of the electrode plate, the manifold port regions (50) including cooling medium manifold ports (51),

a distribution region (60), said distribution region (60) being located between two of said manifold port regions (50), said distribution region (60) and said manifold port regions (50) having a void area therebetween,

a reaction zone (70), wherein the reaction zone (70) is positioned between the two distribution zones (60), a cooling runner is arranged on the reaction zone (70),

the guide runner is arranged on the blank area, one end of the guide runner is communicated with the cooling medium manifold port (51), the other end of the guide runner is communicated with the cooling runner, the guide runner is defined by a guide piece (40), and the guide piece (40) is formed by injection molding.

2. The plate of claim 1, wherein the side of the coolant manifold port (51) facing the guide flow channel includes first and second rounded corners at both ends, and straight sides connected to the first and second rounded corners, respectively; the deflector (40) comprises: a first reference deflector (41), a second reference deflector (42) and a third reference deflector (43), wherein

-the axis of at least part of the first datum guide (41) near the cooling medium manifold mouth (51) coincides with the first rounded bisector;

-the axis of at least part of the second reference guide (42) near the cooling medium manifold mouth (51) coincides with the midline of the straight edge;

an axis of at least a portion of the third datum guide (43) proximate the coolant manifold port (51) coincides with the second rounded bisector.

3. The plate according to claim 2, wherein the flow guide (40) further comprises: and a plurality of sub-guide pieces (44) are arranged between the first reference guide piece (41) and the second reference guide piece (42) and between the second reference guide piece (42) and the third reference guide piece (43).

4. The plate of claim 3, further comprising: the sealing piece (90) and the communicating piece, the sealing piece (90) is enclosed and established outside the cooling medium manifold mouth (51), the blank area, the distribution area (60) and the reaction area (70), the communicating piece is located the one end of water conservancy diversion spare (40) direction of height, and is used for with water conservancy diversion spare (40) with sealing piece (90).

5. The plate according to claim 4, characterized in that the communication members include a first communication member (81) and a second communication member (82), one end of the first communication member (81) being connected to the sealing member (90) located at one side of the cooling medium manifold port (51) and being used for sequentially connecting one end of the first reference guide member (41), the second reference guide member (42), the third reference guide member (43) and a plurality of sub-guide members (44), the second communication member (82) being used for connecting the other end of the third reference guide member (43) to the sealing member (90) located at the other side of the cooling medium manifold port (51).

6. The pole plate according to claim 4, characterized in that the width of the first communicating member (81) and the second communicating member (82) is larger than 2mm, and the width of the first reference flow guiding member (41), the second reference flow guiding member (42), the third reference flow guiding member (43) and the sub-flow guiding member (44) is 2mm-4mm.

7. The plate of claim 4, wherein the seal (90) has a first fillet relief (91) opposite the anode manifold port (53), a second fillet relief (92) opposite the cathode manifold port (52), and the third datum guide (43) is disposed opposite and concentric to the first fillet relief (91) to define a merge region (45).

8. The plate according to claim 4, wherein the height of the flow guide member (40) is larger than the height of the communication member, and the cross-sectional area of the end portion of the communication member in the height direction is gradually reduced.

9. The pole plate according to any of claims 4-8, characterized in that the flow guide (40) is constructed as a rubber part and is integrally formed with the sealing element (90).

10. A single cell, characterized by comprising:

a cathode plate (10) and an anode plate (20), the cathode plate (10) and/or the anode plate (20) being the electrode plate according to any one of claims 1 to 9,

a membrane electrode assembly (30), the membrane electrode assembly (30) being disposed between the cathode plate (10) and the anode plate (20).

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