CN218731068U - Bipolar plate for fuel cell - Google Patents
Bipolar plate for fuel cell Download PDFInfo
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- CN218731068U CN218731068U CN202222871297.1U CN202222871297U CN218731068U CN 218731068 U CN218731068 U CN 218731068U CN 202222871297 U CN202222871297 U CN 202222871297U CN 218731068 U CN218731068 U CN 218731068U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The utility model belongs to the technical field of fuel cells and discloses a fuel cell bipolar plate, which comprises a bipolar plate body, wherein the bipolar plate body comprises an anode plate and a cathode plate; the outer side surface of the anode plate is provided with an anode flow field, and the anode flow field comprises a plurality of snake-shaped flow channels; the outer side surface of the cathode plate is provided with a cathode flow field, and the cathode flow field comprises a plurality of parallel flow channels; the inner side surface of the anode plate is connected with the inner side surface of the cathode plate, and the inner side surface of one of the anode plate and the cathode plate is provided with a cooling liquid flow field which comprises a plurality of cooling liquid flow channels. The utility model provides a fuel cell bipolar plate, fluid distribution homogeneity is good, and current density's distribution is even, has stronger thermal control ability, effectively avoids appearing the water logging phenomenon.
Description
Technical Field
The utility model relates to a fuel cell technical field especially relates to a fuel cell bipolar plate.
Background
The bipolar plate is an important component of the fuel cell, plays roles of electric conduction, heat conduction, water drainage, gas distribution and the like in the fuel cell, and the performance of the bipolar plate mainly depends on a flow field structure.
In the prior art, the same flow field structure is generally adopted on the anode plate and the cathode plate, and the difference of the anode and cathode reaction systems and the property of reaction gas is not considered, so that the distribution uniformity of fluid and the distribution uniformity of current density in the battery are influenced, the heat control capability is poor, and the flooding phenomenon is easy to occur.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a fuel cell bipolar plate, fluid distribution homogeneity is good, and current density's distribution is even, has stronger thermal control ability, effectively avoids appearing the water logging phenomenon.
To achieve the purpose, the utility model adopts the following technical proposal:
a fuel cell bipolar plate comprises a bipolar plate body including an anode plate and a cathode plate; wherein the content of the first and second substances,
an anode flow field is arranged on the outer side surface of the anode plate and comprises a plurality of snake-shaped flow channels;
a cathode flow field is arranged on the outer side surface of the cathode plate and comprises a plurality of parallel flow channels;
the inner side surface of the anode plate is attached to the inner side surface of the cathode plate, a cooling liquid flow field is arranged on the inner side surface of one of the anode plate and the cathode plate, and the cooling liquid flow field comprises a plurality of cooling liquid flow channels.
Optionally, a fuel main port, a cooling liquid main port and an oxidant main port are arranged on both sides of the bipolar plate body along the first direction; wherein the content of the first and second substances,
the coolant main port is arranged between the fuel main port and the oxidant main port on the same side, and the two fuel main ports and the two oxidant main ports are arranged diagonally.
Optionally, the two fuel trunk ports are a fuel trunk inlet and a fuel trunk outlet, the two coolant trunk ports are a coolant trunk inlet and a coolant trunk outlet, and the two oxidant trunk ports are an oxidant trunk inlet and an oxidant trunk outlet, respectively; wherein the content of the first and second substances,
the fuel main duct inlet, the coolant main duct outlet, and the oxidant main duct outlet are located on a first side of the first direction;
the fuel main duct outlet, the coolant main duct inlet, and the oxidant main duct inlet are located on a second side of the first direction.
Optionally, a cross-sectional area of the fuel trunk inlet is smaller than or equal to a cross-sectional area of the fuel trunk outlet, a cross-sectional area of the cooling liquid trunk inlet is smaller than or equal to a cross-sectional area of the cooling liquid trunk outlet, and a cross-sectional area of the oxidant trunk inlet is smaller than or equal to a cross-sectional area of the oxidant trunk outlet.
Optionally, the cross-sectional area of the fuel trunk opening is less than the cross-sectional area of the oxidant trunk opening.
Optionally, a fuel bridge runner communicated with the fuel main runner opening and a fuel branch runner communicated with the fuel bridge runner are arranged between the fuel main runner opening and the anode flow field, and the fuel branch runner is communicated with each serpentine runner of the anode flow field;
an oxidant gap bridge runner communicated with the oxidant main runner opening and an oxidant branch runner communicated with the oxidant gap bridge runner are arranged between the oxidant main runner opening and the cathode flow field, and the oxidant branch runner is communicated with each parallel runner of the cathode flow field;
and a cooling liquid bridge runner communicated with the cooling liquid main runner opening and a cooling liquid transition area communicated with the cooling liquid bridge runner are arranged between the cooling liquid main runner opening and the cooling liquid flow field, and the cooling liquid transition area is communicated with each cooling liquid runner of the cooling liquid flow field.
Optionally, the fuel bridge channel and the oxidant bridge channel are both shorter than the coolant bridge channel.
Optionally, both ends of the cathode flow field in the first direction are provided with an oxidant transition region, the oxidant transition region is configured as a dot matrix flow field formed by a plurality of protrusions, and the sum of the areas of the two oxidant transition regions is less than or equal to 10% -20% of the area of the cathode flow field.
Optionally, the width of the serpentine channel is less than or equal to the width of the parallel channel, and the depth of the serpentine channel is less than or equal to the depth of the parallel channel.
Optionally, the width of each of the serpentine flow channel and the parallel flow channel is less than or equal to the width of the cooling liquid flow channel.
The utility model has the advantages that:
the utility model provides a fuel cell bipolar plate can learn from bipolar plate reaction principle that the required fuel flow in the positive pole flow field on the positive plate is little, and the required oxidant flow in the negative pole flow field on the negative plate is big. The anode flow field adopts the design of a serpentine flow channel, so that the anode flow field has larger pressure drop, even if the fuel flow is small, the diffusion of the fuel is facilitated, the fuel is uniformly diffused, and the drainage performance of the anode flow field is excellent due to the larger pressure drop; the cathode flow field adopts the design of parallel flow channels, so that the cathode flow field has smaller pressure drop, even if the flow of the oxidant is large, the oxidant can be uniformly distributed, and the water generated by the reaction can be discharged in time by matching the large flow of the oxidant with the small pressure drop of the cathode flow field. In the case of uniform fuel diffusion and uniform oxidant distribution, the current density distribution is made uniform. In addition, a cooling liquid flow field is designed between the anode plate and the cathode plate, so that the heat control capability of the bipolar plate of the battery is effectively improved, and the safety of the fuel battery is guaranteed.
Drawings
Fig. 1 is a schematic outer side view of an anode plate provided by the present invention;
fig. 2 is a schematic inner side view of an anode plate provided by the present invention;
FIG. 3 is a schematic view of the inside surface of the cathode plate provided by the present invention;
fig. 4 is a schematic diagram of the outer side surface of the cathode plate provided by the utility model.
In the figure:
100. an anode plate; 110. an anode flow field; 111. a snake-shaped flow passage;
200. a cathode plate; 210. a cathode flow field; 211. a parallel flow channel; 220. an oxidant transition zone; 221. a protrusion;
300. a coolant flow field; 310. a coolant flow passage;
411. a fuel main duct inlet; 412. a fuel main duct outlet; 421. an inlet of a main coolant channel; 422. an outlet of the coolant main channel; 431. an oxidant main duct inlet; 432. an oxidant main duct outlet;
510. a fuel gap bridge runner; 521. a fuel branch groove; 522. a fuel branch through hole;
610. an oxidant gap bridge runner; 620. an oxidant branch trunk;
710. a cooling liquid bridge flow channel; 720. a coolant transition zone;
810. a sealing groove; 820. positioning a groove; 830. a routing inspection port; 840. and (7) positioning the holes.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
Referring to fig. 1 to 4, the present embodiment provides a fuel cell bipolar plate including a bipolar plate body including an anode plate 100 and a cathode plate 200; an anode flow field 110 is arranged on the outer side surface of the anode plate 100, and the anode flow field 110 comprises a plurality of snake-shaped flow channels 111; a cathode flow field 210 is arranged on the outer side surface of the cathode plate 200, and the cathode flow field 210 comprises a plurality of parallel flow channels 211; the inner side of the anode plate 100 is attached to the inner side of the cathode plate 200, and the inner side of one of the anode plate 100 and the cathode plate 200 is provided with a cooling fluid flow field 300, and the cooling fluid flow field 300 includes a plurality of cooling fluid channels 310.
It can be seen from the bipolar plate reaction principle that the anode flow field 110 on the anode plate 100 requires a small fuel flow rate and the cathode flow field 210 on the cathode plate 200 requires a large oxidant flow rate. In this embodiment, the design of the serpentine flow channel 111 is adopted in the anode flow field 110, so that a large pressure drop is provided in the anode flow field 110, even if the fuel flow is small, the diffusion of the fuel is facilitated, the fuel diffusion is uniform, and the large pressure drop enables the drainage performance of the anode flow field 110 to be excellent; the cathode flow field 210 adopts the design of the parallel flow channels 211, so that the cathode flow field 210 has smaller pressure drop, even if the flow rate of the oxidant is large, the oxidant can be uniformly distributed, and the water generated by the reaction can be discharged in time by matching the large flow rate of the oxidant with the small pressure drop of the cathode flow field 210. In the case of uniform fuel diffusion and uniform oxidant distribution, the current density distribution is made uniform. In addition, a cooling fluid flow field 300 is designed between the anode plate 100 and the cathode plate 200, so that the thermal control capability of the bipolar plate of the battery is effectively improved, and the safety of the fuel battery is guaranteed.
Preferably, the bipolar plate body is rectangular in shape.
Preferably, the anode plate 100 and the cathode plate 200 are made of graphite.
Preferably, the fuel is hydrogen and the oxidant is air or oxygen.
Preferably, the shape of the parallel flow channels 211 may be wavy to increase the pressure drop of the cathode flow field 210, and further improve the drainage capability of the cathode flow field 210.
Preferably, the inner side of the cathode plate 200 is provided with the cooling liquid flow field 300, and the thickness of the anode plate 100 is smaller than that of the cathode plate 200, so that the thickness of the bipolar plate body is reduced as much as possible to improve the volume power density of the stack under the condition of ensuring the strength of the bipolar plate body. Of course, the thickness of the anode plate 100 may be equal to the thickness of the cathode plate 200.
Because the flow of the fuel is less than the flow of the oxidant in the reaction process of the oxidant and the fuel, in this embodiment, the width of the serpentine channel 111 is preferably less than the width of the parallel channel 211, which effectively ensures that the linear velocity of the air is greater than the linear velocity of the hydrogen, so that the oxidant and the fuel react sufficiently, and the serpentine channel has the effect of enhancing the drainage capacity, thereby avoiding the flooding phenomenon. Of course, the width of the serpentine channel 111 can be equal to the width of the parallel channels 211.
Preferably, the depth of the serpentine flow channels 111 is less than the depth of the parallel flow channels 211 to further ensure that the linear velocity of the air is greater than the linear velocity of the hydrogen. Of course, the depth of the serpentine channels 111 can be equal to the depth of the parallel channels 211.
Since the cooling liquid has a higher viscosity than the gas and a poor fluidity, in the embodiment, the widths of the serpentine flow channel 111 and the parallel flow channel 211 are preferably smaller than the width of the cooling liquid flow channel 310, so as to ensure the fluidity of the cooling liquid, increase the contact area for heat dissipation, and improve the heat dissipation capability. Of course, the width of the serpentine channels 111 and the parallel channels 211 may be equal to the width of the coolant channels 310.
In this embodiment, the two sides of the bipolar plate body along the first direction are provided with a fuel main port, a cooling liquid main port and an oxidant main port; wherein, the cooling liquid main channel opening is arranged between the fuel main channel opening and the oxidant main channel opening on the same side, and the two fuel main channel openings and the two oxidant main channel openings are arranged in opposite angles. In this embodiment, the coolant main channel opening is disposed between the fuel main channel opening and the oxidant main channel opening to improve the cooling effect of the coolant flow field 300, and the two fuel main channel openings and the two oxidant main channel openings are disposed diagonally to each other to facilitate the full reaction of the fuel and the oxidant. Wherein the first direction is a direction in fig. 1, i.e. the length direction of the bipolar plate body.
Specifically, a fuel main channel port, a coolant main channel port, and an oxidant main channel port all penetrate through the anode plate 100 and the cathode plate 200.
Further, the two fuel trunk ports are respectively a fuel trunk inlet 411 and a fuel trunk outlet 412, the two coolant trunk ports are respectively a coolant trunk inlet 421 and a coolant trunk outlet 422, and the two oxidant trunk ports are respectively an oxidant trunk inlet 431 and an oxidant trunk outlet 432; wherein the fuel main channel inlet 411, the coolant main channel outlet 422, and the oxidant main channel outlet 432 are located on a first side of the bipolar plate body in a first direction; the fuel main channel outlet 412, the coolant main channel inlet 421 and the oxidant main channel inlet 431 are located on the second side of the bipolar plate body along the first direction, so that the fuel and the oxidant flow in the reverse direction, uniform distribution and balance of water inside the fuel cell are facilitated, the ionic conductivity of the diaphragm is increased, and the performance of the fuel cell is further improved.
Preferably, the cross-sectional area of the fuel main inlet 411 is smaller than the cross-sectional area of the fuel main outlet 412, which effectively balances the flow of the fuel in the anode flow field 110, so that the fuel is uniformly distributed in the anode flow field 110. Of course, the cross-sectional area of the fuel main inlet 411 may also be equal to the cross-sectional area of the fuel main outlet 412.
Preferably, the sectional area of the inlet 421 of the coolant main channel is smaller than the sectional area of the outlet 422 of the coolant main channel, so as to effectively balance the flow of the oxidant in the cathode flow field 210, and thus the oxidant is uniformly distributed in the cathode flow field 210. Of course, the cross-sectional area of the inlet 421 may be equal to the cross-sectional area of the outlet 422.
Preferably, the sectional area of the inlet 431 of the main oxidizer channel is smaller than that of the outlet 432 of the main oxidizer channel, so as to effectively balance the flow rate of the cooling fluid in the cooling fluid flow field 300, and thus the cooling fluid is uniformly distributed in the cooling fluid flow field 300. Of course, the sectional area of the oxidant main duct inlet 431 may be equal to the sectional area of the oxidant main duct outlet 432.
The flow of the oxidant is larger than the flow of the fuel, and the linear velocity of the oxidant is required to be ensured to be larger than that of the fuel in the reaction process of the oxidant and the fuel. In this embodiment, the cross-sectional area of the fuel trunk opening is smaller than the cross-sectional area of the oxidant trunk opening, so that the drainage capacity can be enhanced, and the flooding phenomenon can be avoided.
In the present embodiment, a fuel bridge runner 510 communicated with the fuel main runner opening and a fuel branch runner communicated with the fuel bridge runner 510 are disposed between the fuel main runner opening and the anode flow field 110, and the fuel branch runners are communicated with the serpentine runners 111 of the anode flow field 110. In the present embodiment, the fuel sequentially flows through the fuel main channel inlet 411, the fuel bridge-passing channel 510 and the fuel branch main channel on the first side of the bipolar plate body, each serpentine channel 111, the fuel bridge-passing channel 510 and the fuel branch main channel on the second side of the bipolar plate body, and the fuel main channel outlet 412, and the design of the fuel bridge-passing channel 510 and the fuel branch main channel enables the oxidant to smoothly flow through each serpentine channel 111, so that the oxidant is uniformly distributed in each serpentine channel 111.
Specifically, the fuel bridge flow path 510 extends along a first direction and is provided in plurality side by side along a second direction. Wherein the second direction is the b direction in fig. 1, i.e. the width direction of the bipolar plate body.
Specifically, the fuel branch trunk extends in the second direction.
Specifically, taking the inner side surface of the cathode plate 200 as an example to be provided with the coolant flow field 300, the fuel bridge flow channel 510 is disposed on the inner side surface of the cathode plate 200, the fuel branch trunk includes a fuel branch groove 521 disposed on the inner side surface of the cathode plate 200 and communicated with the fuel main trunk opening, the fuel branch trunk further includes a fuel branch through hole 522 disposed on the anode plate 100 and communicated with the fuel branch groove 521, and the fuel branch through hole 522 is communicated with each serpentine flow channel 111 of the anode flow field 110.
In this embodiment, an oxidant bridge flow channel 610 communicated with the oxidant main channel opening and an oxidant branch flow channel 620 communicated with the oxidant bridge flow channel 610 are disposed between the oxidant main channel opening and the cathode flow field 210, and the oxidant branch flow channel 620 is communicated with each parallel flow channel 211 of the cathode flow field 210. In this embodiment, the oxidizer sequentially flows through the oxidizer main channel inlet 431, the oxidizer bridge-passing flow channel 610 and the oxidizer branch main channel 620 on the second side of the bipolar plate body, each parallel flow channel 211, the oxidizer bridge-passing flow channel 610 and the oxidizer branch main channel 620 on the first side of the bipolar plate body, and the oxidizer main channel outlet 432, and the design of the oxidizer bridge-passing flow channel 610 and the oxidizer branch main channel 620 enables the oxidizer to smoothly flow through each parallel flow channel 211, so that the oxidizer is uniformly distributed in each parallel flow channel 211.
Specifically, the oxidant bridge flow channel 610 extends along a first direction and is provided in plurality side by side along a second direction.
Specifically, the oxidant branch trunk 620 is extended in the second direction to homogenize the oxidant flowing through each of the parallel flow channels 211.
Specifically, taking the example of the cathode plate 200 having the coolant flow field 300 on the inside thereof, the oxidant bridge flow channel 610 is disposed on the inside of the cathode plate 200, and the oxidant branch trunk channel 620 is configured to penetrate the oxidant branch through-holes of the cathode plate 200.
It should be noted that, the two ends of the cathode flow field 210 along the length direction of the bipolar plate body are both provided with an oxidant transition area 220, the oxidant transition area 220 is configured as a lattice flow field formed by a plurality of protrusions 221, and channels can be formed between adjacent protrusions 221, so that the oxidant flowing through each parallel channel 211 can be homogenized effectively.
Specifically, the outer circumferential side wall of the protrusion 221 may be provided in a curved surface shape or a polyhedral shape. Preferably, the protrusion 221 is configured as a cylinder or a hemisphere, so as to avoid forming a sharp part in the flow channel formed by the protrusion 221 to affect the flow rate and the flow direction of the oxidant, so that the oxidant flows more smoothly.
Specifically, the protrusions 221 may be randomly distributed or staggered in multiple rows, and the specific arrangement of the protrusions 221 is not limited. Preferably, the protrusions 221 are arranged in a plurality of rows along the first direction, and the protrusions 221 in two adjacent rows are arranged in a staggered manner, wherein the oxidant branch trunk 620 is arranged in the same row as the protrusion 221 in the outermost row, so that the oxidant flowing through each parallel flow channel 211 can be further homogenized.
Preferably, the protrusions 221 may be integrally formed with the cathode plate 200, so that the connection between the protrusions 221 and the cathode plate 200 has high strength. Of course, the protrusions 221 may be provided to be made of an elastic material, thereby increasing the shock-resistant and cushioning properties of the bipolar plate body.
In this embodiment, too large or too small a proportion of the oxidant transition region 220 may affect the uniformity of the oxidant flowing through each parallel flow channel 211, and preferably, the sum of the areas of the two oxidant transition regions 220 is less than or equal to 10% -20% of the area of the cathode flow field 210, so as to uniformly distribute the oxidant in each parallel flow channel 211.
Preferably, the sum of the areas of the two oxidant transition zones 220 is 12%, 15%, 16%, or 18% of the area of the cathode flow field 210.
Preferably, the areas of the two oxidant transition zones 220 are equal in size.
In this embodiment, a coolant bridge flow channel 710 communicated with the coolant main channel opening and a coolant transition region 720 communicated with the coolant bridge flow channel 710 are disposed between the coolant main channel opening and the coolant flow field 300, and the coolant transition region 720 is communicated with each coolant flow channel 310 of the coolant flow field 300.
Specifically, the coolant bridge passage 710 extends along a first direction and is arranged in a plurality of rows along a second direction.
Specifically, the coolant flow channel 310 may be serpentine, or may be straight or have other shapes, which are not limited herein.
Specifically, the coolant flow channel 310 is exemplified by a straight line shape extending in the first direction, and the coolant transition region 720 is configured as a cooling groove extending in the second direction.
It should be noted that the fuel bridge flow channel 510 and the oxidant bridge flow channel 610 are both shorter than the coolant bridge flow channel 710, and the coolant bridge flow channel 710 forms a relief, so as to ensure that the sealing performance of the three fluids, i.e., the fuel, the oxidant and the coolant, in each flowing area reaches the practical requirement.
In this embodiment, the inside and outside of the anode plate 100 and the cathode plate 200 are both provided with sealing grooves 810, the number and arrangement of the sealing grooves 810 depend on the specific structure of the bipolar plate body, and sealing rings are installed in the sealing grooves 810 to ensure the sealing performance of the fuel, oxidant and coolant in each flowing area to meet practical requirements.
Specifically, taking the case of the cooling fluid flow field 300 disposed on the inner side of the cathode plate 200 as an example, the outer side of the anode plate 100 is provided with a sealing groove 810 around the anode flow field 110 and the fuel branch through hole 522, and the outer side of the anode plate 100 is provided with a sealing groove 810 around the fuel main trunk opening, around the cooling fluid main trunk opening, and around the oxidant main trunk opening respectively.
Further, the outer side of the cathode plate 200 is provided with a sealing groove 810 around the oxidant transition region 220, the oxidant branch trunk 620 and the cathode flow field 210, and the outer side of the cathode plate 200 is provided with a sealing groove 810 around the fuel trunk opening, around the coolant trunk opening and around the oxidant trunk opening respectively.
Further, a sealing groove 810 is formed in the inner side surface of the cathode plate 200 along the edge of the inner side surface of the cathode plate 200, the sealing groove 810 is formed in the inner side surface of the cathode plate 200 around the coolant flow field 300, the coolant main trunk opening, the coolant bridge flow passage 710 and the coolant transition region 720, the sealing groove 810 is formed in the inner side surface of the cathode plate 200 around the fuel main trunk opening, the fuel bridge flow passage 510 and the fuel branch trunk opening on the same side, and the sealing groove 810 is formed in the inner side surface of the cathode plate 200 around the oxidant main trunk opening, the oxidant bridge flow passage 610 and the oxidant branch trunk opening 620 on the same side.
It is worth mentioning that the depth of the sealing groove 810 is not greater than the depth of the serpentine flow channel 111 and the parallel flow channel 211.
In the present embodiment, at least one positioning groove 820 is correspondingly disposed on the peripheral sides of the anode plate 100 and the cathode plate 200, so as to facilitate positioning and assembling of the bipolar plate body.
In this embodiment, at least one inspection opening 830 is correspondingly disposed on the peripheral sides of the anode plate 100 and/or the cathode plate 200, so as to facilitate inspection of the bipolar plate body.
In the embodiment, the anode plate 100 and the cathode plate 200 are correspondingly provided with positioning holes 840 for matching with positioning shafts to facilitate the positioning and installation of the bipolar plate main body in the fuel cell. Specifically, the positioning holes 840 are provided at corners of the anode plate 100 and the cathode plate 200, and preferably, two or four positioning holes 840 are provided, and the positioning holes 840 are provided diagonally when two are provided.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A fuel cell bipolar plate, comprising a bipolar plate body including an anode plate (100) and a cathode plate (200); wherein the content of the first and second substances,
an anode flow field (110) is arranged on the outer side surface of the anode plate (100), and the anode flow field (110) comprises a plurality of serpentine flow channels (111);
a cathode flow field (210) is arranged on the outer side surface of the cathode plate (200), and the cathode flow field (210) comprises a plurality of parallel flow channels (211);
the inner side surface of the anode plate (100) is attached to the inner side surface of the cathode plate (200), a cooling liquid flow field (300) is arranged on the inner side surface of one of the anode plate (100) and the cathode plate (200), and the cooling liquid flow field (300) comprises a plurality of cooling liquid flow channels (310).
2. The fuel cell bipolar plate of claim 1, wherein a fuel main port, a coolant main port, and an oxidant main port are provided on both sides of the bipolar plate body in the first direction; wherein the content of the first and second substances,
the coolant main port is arranged between the fuel main port and the oxidant main port on the same side, and the two fuel main ports and the two oxidant main ports are arranged diagonally.
3. A fuel cell bipolar plate as claimed in claim 2, wherein two of said fuel trunk inlets are a fuel trunk inlet (411) and a fuel trunk outlet (412), two of said coolant trunk inlets are a coolant trunk inlet (421) and a coolant trunk outlet (422), and two of said oxidant trunk inlets are an oxidant trunk inlet (431) and an oxidant trunk outlet (432), respectively; wherein the content of the first and second substances,
the fuel main channel inlet (411), the coolant main channel outlet (422), and the oxidant main channel outlet (432) are located on a first side of the first direction;
the fuel main channel outlet (412), the cooling liquid main channel inlet (421), and the oxidant main channel inlet (431) are located on a second side of the first direction.
4. A fuel cell bipolar plate as claimed in claim 3, wherein a sectional area of the fuel main channel inlet (411) is equal to or less than a sectional area of the fuel main channel outlet (412), a sectional area of the coolant main channel inlet (421) is equal to or less than a sectional area of the coolant main channel outlet (422), and a sectional area of the oxidizer main channel inlet (431) is equal to or less than a sectional area of the oxidizer main channel outlet (432).
5. The fuel cell bipolar plate of claim 2, wherein a cross-sectional area of said fuel stem opening is less than a cross-sectional area of said oxidant stem opening.
6. The fuel cell bipolar plate of claim 2, wherein a fuel bridge runner (510) communicated with the fuel main runner port and a fuel branch runner communicated with the fuel bridge runner (510) are arranged between the fuel main runner port and the anode flow field (110), and the fuel branch runners are communicated with the serpentine runners (111) of the anode flow field (110);
an oxidant bridge runner (610) communicated with the oxidant main runner opening and an oxidant branch runner (620) communicated with the oxidant bridge runner (610) are arranged between the oxidant main runner opening and the cathode flow field (210), and the oxidant branch runner (620) is communicated with each parallel runner (211) of the cathode flow field (210);
a cooling liquid bridge flow channel (710) communicated with the cooling liquid main flow channel and a cooling liquid transition area (720) communicated with the cooling liquid bridge flow channel (710) are arranged between the cooling liquid main flow channel and the cooling liquid flow field (300), and the cooling liquid transition area (720) is communicated with each cooling liquid flow channel (310) of the cooling liquid flow field (300).
7. The fuel cell bipolar plate of claim 6, wherein said fuel bridge flow channels (510) and said oxidant bridge flow channels (610) are each shorter than said coolant bridge flow channels (710).
8. The fuel cell bipolar plate according to any one of claims 1 to 7, wherein both ends of the cathode flow field (210) in the first direction are provided with an oxidant transition region (220), the oxidant transition region (220) is configured as a lattice flow field consisting of a plurality of protrusions (221), and the sum of the areas of the two oxidant transition regions (220) is 10% -20% of the area of the cathode flow field (210).
9. The fuel cell bipolar plate according to any one of claims 1 to 7, wherein the width of the serpentine flow channels (111) is equal to or less than the width of the parallel flow channels (211), and the depth of the serpentine flow channels (111) is equal to or less than the depth of the parallel flow channels (211).
10. The fuel cell bipolar plate according to any one of claims 1 to 7, wherein the width of each of the serpentine flow channels (111) and the parallel flow channels (211) is equal to or less than the width of the coolant flow channel (310).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222871297.1U CN218731068U (en) | 2022-10-28 | 2022-10-28 | Bipolar plate for fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222871297.1U CN218731068U (en) | 2022-10-28 | 2022-10-28 | Bipolar plate for fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218731068U true CN218731068U (en) | 2023-03-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117457933A (en) * | 2023-12-20 | 2024-01-26 | 上海治臻新能源股份有限公司 | Pile, fuel cell and electrolytic tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117457933A (en) * | 2023-12-20 | 2024-01-26 | 上海治臻新能源股份有限公司 | Pile, fuel cell and electrolytic tank |
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Address after: 516000 Plot Factory, No. ZKD-005-02, Sanhe Village, Tonghu Town, Zhongkai High tech Zone, Huizhou City, Guangdong Province Patentee after: Huizhou Yiwei Hydrogen Energy Co.,Ltd. Address before: 516000 Plot Factory, No. ZKD-005-02, Sanhe Village, Tonghu Town, Zhongkai High tech Zone, Huizhou City, Guangdong Province Patentee before: Huizhou Yiwei Fuel Cell Co.,Ltd. |
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