CN116565246A - Fuel cell flow field plate - Google Patents

Fuel cell flow field plate Download PDF

Info

Publication number
CN116565246A
CN116565246A CN202310431416.8A CN202310431416A CN116565246A CN 116565246 A CN116565246 A CN 116565246A CN 202310431416 A CN202310431416 A CN 202310431416A CN 116565246 A CN116565246 A CN 116565246A
Authority
CN
China
Prior art keywords
flow
columns
fuel cell
column
field plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310431416.8A
Other languages
Chinese (zh)
Inventor
邹雨廷
花仕洋
陈琛
胡志忠
叶东浩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan Research Institute Of Marine Electric Propulsion No 712 Research Institute Of China Shipbuilding Corp
Wuhan Hydrogen Energy and Fuel Cell Industry Technology Research Institute Co Ltd
Original Assignee
Wuhan Research Institute Of Marine Electric Propulsion No 712 Research Institute Of China Shipbuilding Corp
Wuhan Hydrogen Energy and Fuel Cell Industry Technology Research Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan Research Institute Of Marine Electric Propulsion No 712 Research Institute Of China Shipbuilding Corp, Wuhan Hydrogen Energy and Fuel Cell Industry Technology Research Institute Co Ltd filed Critical Wuhan Research Institute Of Marine Electric Propulsion No 712 Research Institute Of China Shipbuilding Corp
Priority to CN202310431416.8A priority Critical patent/CN116565246A/en
Publication of CN116565246A publication Critical patent/CN116565246A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H01M8/0265—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant the reactant or coolant channels having varying cross sections
    • 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

Abstract

Embodiments of the present application provide a fuel cell flow field plate. A fuel cell flow field plate comprising a bottom plate and a flow-disturbing column: a bottom plate having an inlet and an outlet, a flow passage being formed between the inlet and the outlet; the turbulent flow columns protrude out of the surface of the bottom plate and are uniformly distributed in the flow channels; the orthographic projection profile of at least one turbulent flow column on the bottom plate is of a trapezoid structure, and the trapezoid structure comprises at least two fillets. According to the embodiment of the application, the turbulent flow columns are arranged in the flow channel, and the gaseous medium collides with the turbulent flow columns when flowing in the flow channel, so that two branched air flows are forced to be branched, and the two branched air flows can be converged with the branched air flows in the adjacent upper and lower identical structures. Therefore, the continuous cross mixing disturbance of the gases in different areas in the flow channel is realized, and the pressure difference is reduced due to the increase of the flow area, so that the phenomenon that liquid water in independent flow channels in parallel flow channels or wave-shaped flow channels continuously accumulates to cause water blockage is avoided.

Description

Fuel cell flow field plate
Technical Field
The present application relates to the field of fuel cell technology, and in particular, to a fuel cell flow field plate.
Background
The bipolar plate is one of important components of the fuel cell, and has the main function of providing good working medium pressure concentration for each region distribution in the reaction region, so that the fuel cell can fully utilize reactants to achieve good power generation conditions.
The main flow field flow channels used in the main flow field of the existing large-area fuel cell are usually wave flow fields or parallel flow fields, and the wave flow fields have better disturbance effect on air flow compared with the parallel flow fields, so that the wave flow field fuel cell is generally considered to have higher performance in the aspect of disturbance effect, for example, the Chinese patent application No. CN201810720941.0 describes a bipolar plate of a proton exchange membrane fuel cell, and the Chinese patent application No. CN201721583861.2 describes a bipolar plate of a fuel cell, and all wave flow channel flow fields are adopted. However, compared with a parallel flow field, the wave flow field is mainly used for enhancing mass transfer by increasing the flow length in a single flow channel and wave disturbance, so that the pressure drop of the wave flow field is larger than that of the parallel flow field, and the edge flow channel of the wave flow field is not matched with the linear edge of the polar plate and the common membrane electrode, so that the edge flow channel area or the local reaction area of the edge of the membrane electrode is wasted. The chinese patent application No. CN202210574254.9 discloses a droplet-shaped flow field structure of the fuel cell, which enhances the turbulence degree of the gas in the flow channel, and improves the performance of the fuel cell, but the internal flow-splitting and direct-merging flow design can generate almost vertical impact of the gas flow or the internal liquid droplets in the converging region, so that the unsmooth arc profile design is not beneficial to drainage and increases the pressure drop.
In summary, the flow field plate in the prior art has the technical problems of large pressure drop, waste of flow passage area or local reaction area at the edge of the membrane electrode, and adverse drainage.
Disclosure of Invention
The application provides a fuel cell flow field plate aiming at the defects of the prior art, which is used for solving the technical problems that the flow field plate has larger pressure drop, wastes flow passage area or local reaction area at the edge of a membrane electrode and is not beneficial to drainage in the prior art.
Embodiments of the present application provide a fuel cell flow field plate comprising:
a base plate having an inlet and an outlet, a flow path being formed between the inlet and the outlet;
the turbulent flow columns protrude out of the surface of the bottom plate and are uniformly distributed in the flow channel;
the front projection outline of at least one vortex column on the bottom plate is of a trapezoid structure, and the trapezoid structure comprises at least two fillets.
In some embodiments of the present application, the flow channel comprises a parallel flow channel, the inlet and the outlet are respectively positioned at two ends of the parallel flow channel, and the cross-sectional area of the inlet is equal to the cross-sectional area of the outlet.
In some embodiments of the present application, the orthographic projection profile of the spoiler column on the bottom plate is an axisymmetric regular trapezoid, and an upper bottom and a lower bottom of the regular trapezoid are both parallel to the extending direction of the runner.
In some embodiments of the present application, a gap exists between two adjacent spoiler posts in the same column, and at least one spoiler post in the adjacent column is flush with the gap.
In some embodiments of the present application, the orthographic projection profile of at least two of the spoiler columns in the same column on the bottom plate is the same.
In some embodiments of the present application, the profile of the spoiler columns in the odd numbered columns is opposite to the profile of the spoiler columns in the even numbered columns.
In some embodiments of the present application, the fuel cell flow field plate includes a spoiler unit, each spoiler unit includes two spoiler posts in adjacent columns, and two spoiler posts in the same spoiler unit are arranged in a central symmetry manner.
In some embodiments of the present application, a longitudinal period between the spoiler units is not less than 2mm and not more than 2.4 mm, and a lateral period is not less than 19 mm and not more than 21 mm.
In some embodiments of the present application, a longitudinal pitch between two spoiler posts in the same spoiler unit is not less than 0.4mm and not more than 0.5 mm, and a lateral pitch is not less than 9mm and not more than 11 mm.
In some embodiments of the present application, the spoiler column includes a solid boss protruding from the floor or a hollow groove with a sidewall protruding from the floor.
The beneficial technical effects that technical scheme that this application embodiment provided brought include: according to the embodiment of the application, the turbulent flow columns are arranged in the flow channel, and the gaseous medium collides with the turbulent flow columns when flowing in the flow channel, so that two branched air flows are forced to be branched, and the two branched air flows can be converged with the branched air flows in the adjacent upper and lower identical structures. The flow dividing and converging flow is arranged in each area in the flow channel, which is equivalent to adding a plurality of wave-shaped flow channels which continuously exchange gas in the whole flow field, thereby realizing continuous cross mixing disturbance on the gas in different areas in the flow channel, and reducing the pressure difference due to increasing the flow area, and the phenomenon that liquid water in independent flow channels is continuously accumulated and blocked in parallel flow channels or wave-shaped flow channels is avoided, and the generated liquid water is continuously collided and separated along with the separation and the combination of the gas flows, so that smaller liquid drop state is kept in the flow field as much as possible, and the liquid water can be more conveniently discharged. The flow field structure realizes continuous staggered flow distribution disturbance of gaseous medium in the flow field on the flow disturbing column, thereby enhancing the drainage effect and the power generation performance of liquid medium.
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, in which:
fig. 1 is a schematic structural diagram of a flow field plate of a fuel cell according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a spoiler column according to an embodiment of the present application.
The marks in the figure:
1-a bottom plate; 2-turbulent flow column;
21-a first spoiler column; 22-second spoiler column.
Detailed Description
Embodiments of the present application are described below with reference to the drawings in the present application. It should be understood that the embodiments described below with reference to the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application, and the technical solutions of the embodiments of the present application are not limited.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of other features, information, data, steps, operations, elements, components, and/or groups thereof, etc. that may be implemented as desired in the art. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled.
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings. It should be noted that the following embodiments may be referred to, or combined with each other, and the description will not be repeated for the same terms, similar features, similar implementation steps, and the like in different embodiments.
An embodiment of the present application provides a fuel cell flow field plate, as shown in fig. 1, and fig. 1 is a schematic structural diagram of the fuel cell flow field plate provided in the embodiment of the present application.
A fuel cell flow field plate comprising a bottom plate 1 and a spoiler column 2:
a base plate 1 having an inlet and an outlet, a flow path being formed between the inlet and the outlet;
the turbulent flow columns 2 protrude out of the surface of the bottom plate 1 and are uniformly distributed in the flow channel;
the front projection profile of at least one spoiler column 2 on the bottom plate 1 is a trapezoid structure, and the trapezoid structure comprises at least two fillets.
In this embodiment of the present application, through arranging the turbulent flow column 2 in the flow channel, the gaseous medium collides with the turbulent flow column 2 when flowing in the flow channel, so as to forcedly split two partial flows, and the two partial flows can be converged with the air flows split in the adjacent upper and lower identical structures. The flow dividing and converging flow is arranged in each area in the flow channel, which is equivalent to adding a plurality of wave-shaped flow channels which continuously exchange gas in the whole flow field, thereby realizing continuous cross mixing disturbance on the gas in different areas in the flow channel, and reducing the pressure difference due to increasing the flow area, and the phenomenon that liquid water in independent flow channels is continuously accumulated and blocked in parallel flow channels or wave-shaped flow channels is avoided, and the generated liquid water is continuously collided and separated along with the separation and the combination of the gas flows, so that smaller liquid drop state is kept in the flow field as much as possible, and the liquid water can be more conveniently discharged. The method realizes continuous staggered and split flow disturbance of the gaseous medium in the flow field on the turbulent flow column 2, thereby enhancing the drainage effect and the power generation performance of the liquid medium.
In some embodiments of the present application, the flow channel comprises a parallel flow channel, the inlet and the outlet are respectively positioned at two ends of the parallel flow channel, and the cross-sectional area of the inlet is equal to the cross-sectional area of the outlet.
In some embodiments, the flow channels comprise serpentine flow channels and the flow field plates are square.
In other embodiments, the flow channels comprise parallel flow channels and the flow field plates are rectangular. And a part of the turbulence columns 2 are arranged in the flow channel in an array manner, the flow channel is divided into a plurality of sub-flow channels by the turbulence columns 2, and the sub-flow channels are basically communicated with each other. A gap exists between two adjacent turbulent flow columns 2 in the same row, and the gap is a sub-runner.
The medium flows along the flow passage from the inlet to the outlet, and the same stream of gaseous medium passes through a sub-flow passage formed between the turbulence columns 2 of the previous row until the gaseous medium hits the turbulence columns 2 of the next row to be split. Specifically, the medium collides with the oblique side or the acute angle of the regular trapezoid, and the medium which collides with the oblique side flows to the side close to the upper bottom of the regular trapezoid in a direction of deflection; the medium that hits the acute angle is split into two parts, one part flows to the side near the upper bottom of the regular trapezoid, and the other part flows to the side near the lower bottom of the regular trapezoid.
The medium flowing toward the side close to the upper bottom of the regular trapezoid in the flow channel is merged with the medium flowing toward the side close to the lower bottom of the regular trapezoid in the adjacent flow channel, and the adjacent flow channel refers to a turbulent flow column 2 facing the side close to the upper bottom of the regular trapezoid in the flow channel. Similarly, the medium flowing toward the bottom side of the regular trapezoid in the flow channel merges with the medium flowing toward the upper bottom side of the regular trapezoid in the adjacent flow channel, and the adjacent flow channel refers to the turbulence post 2 facing the lower bottom side of the regular trapezoid.
In some embodiments of the present application, the orthographic projection profile of the spoiler column 2 on the bottom plate 1 is an axisymmetric regular trapezoid, and an upper bottom and a lower bottom of the regular trapezoid are parallel to the extending direction of the runner.
In this embodiment, the direction from the inlet to the outlet is the extending direction of the flow channel, the basic unit of the flow field plate is the turbulent flow column 2, and the upper base and the lower base of the right trapezoid in the turbulent flow column 2 are parallel to the extending direction of the flow channel.
The side walls of the flow field plate, and the upper and lower bottoms of the spoiler column 2 are all planar surfaces, and the planar surfaces are parallel to the extending direction of the flow channels. When flowing through the turbulent flow column 2 and the side wall of the flow field plate in the flow channel, the medium is in linear contact with the turbulent flow column 2 and the side wall of the flow field plate, namely, the contact points of the medium and the turbulent flow column 2 and the side wall of the flow field plate are continuous and are in a straight line in the sectional view.
Compared with a wave-shaped flow field, the medium generates nonlinear contact when flowing through the wave-shaped edge, namely the wave-shaped edge is provided with a periodical concave-convex structure, the medium generates a trend of moving towards the center of the flow channel when flowing from the concave structure to the convex structure, and the medium cannot be rapidly attached to the edge when flowing from the convex structure to the next concave structure, so that nonlinear contact is generated, and a larger cavity appears.
In some embodiments of the present application, a gap exists between two adjacent spoiler posts 2 in the same column, and at least one spoiler post 2 in the adjacent column is flush with the gap.
In this embodiment, a part of the spoiler columns 2 are arranged in an array, and the other part of the spoiler columns are staggered with the first part of the spoiler columns 2. The first portion of the spoiler column 2 is defined as a first spoiler column 21, and the other portion of the spoiler column 2 is defined as a second spoiler column 22. The first spoiler columns 21 and the second spoiler columns 22 are arranged in an array, but in different embodiments, the first spoiler columns 21 and the second spoiler columns 22 may be the same array or belong to different arrays.
The first turbulence columns 21 and the second turbulence columns 22 are alternately arranged in a row direction, the row direction is parallel to the extending direction of the flow channel, and the column direction is perpendicular to the extending direction of the flow channel.
The two adjacent rows of spoiler posts 2 are the first spoiler post 21 and the second spoiler post 22, respectively, and the first spoiler post 21 and the second spoiler post 22 in the same row have a horizontal space and a vertical space.
In the adjacent two rows of the first spoiler columns 21, only a horizontal distance exists between the first spoiler columns 21 in the same row, and the first spoiler columns are flush in the row direction. The above embodiment and the following embodiments are both exemplified by the first spoiler column 21, and the second spoiler column 22 is actually similar thereto, and will not be described again.
Since the gap between the two first spoiler posts 21 is flush with the at least one second spoiler post 22. After the same strand of gaseous medium passes through the sub-flow channel between two adjacent first turbulence columns 21 in the same row, the same strand of gaseous medium collides with a second turbulence column 22 which is flush with the sub-flow channel so as to be split. One part of the liquid crystal display device is divided into two parts, one part flows to the side close to the upper bottom of the regular trapezoid, and the other part flows to the side close to the lower bottom of the regular trapezoid.
The medium flowing toward the side close to the upper bottom of the regular trapezoid in the sub-flow passage is merged with the medium flowing toward the side close to the lower bottom of the regular trapezoid in the adjacent sub-flow passage, and the adjacent first turbulence column 21 faces the side close to the upper bottom of the regular trapezoid in the flow passage. Similarly, the medium flowing toward the bottom side of the regular trapezoid will merge with the medium flowing toward the top side of the regular trapezoid in the adjacent runner, where adjacent means the first turbulence post 21 toward the bottom side of the regular trapezoid.
In some embodiments of the present application, the orthographic projection profile of at least two spoiler posts 2 in the same column on the bottom plate 1 is the same.
In the present embodiment, the spoiler posts 2 in the same row are oriented identically, and are the first spoiler post 21 or the second spoiler post 22, and the areas of at least two spoiler posts 2 are identical. The turbulent flow columns 2 with the same area are positioned at the relatively central position of the flow passage. In practical production, due to practical design requirements in a flow field plate, when the flow field is filled regularly, the turbulence columns 2 with different sizes may occur that the rest area close to the flow channel side wall is insufficient to place one turbulence column 2, where the flow channel side wall refers to the periphery of the bottom plate 1. At this time, the size of the regular trapezoid can be properly reduced in an equal proportion to fill, the cross-sectional size of the flow channel is ensured, the structure connected with the side wall of the flow channel is prevented from being arranged, an excessively wide protruding structure is avoided in the flow field, the excessively wide protruding structure can influence mass transfer and drainage in the area, and a turbulence column 2 for cutting off a part is used in the inlet and outlet area for keeping edge consistency.
In some embodiments of the present application, the profile of the spoiler column 2 in the odd numbered columns is opposite to the profile of the spoiler column 2 in the even numbered columns.
In this embodiment, the longitudinal array features are parallel and spaced apart by a distance that may be determined based on actual staggered flow channel usage.
In the present embodiment, the flow of the turbulent flow column 2 having a positive trapezoid is branched in two directions. Specifically, the positive trapezoid has larger flow split near the upper bottom and smaller flow split near the lower bottom. If all the turbulence columns 2 are arranged in the same direction, the uniformity of the medium in the non-direction-changing area is poor. The spoiler posts 2 on the same column face the same direction, and the spoiler posts 2 on adjacent columns face opposite directions. The odd number columns are first turbulence columns 21, the even number columns are second turbulence columns 22, the upper bottoms of the first turbulence columns 21 are oriented towards the same direction as the lower bottoms of the second turbulence columns 22, and the lower bottoms of the first turbulence columns 21 are oriented towards the same direction as the upper bottoms of the second turbulence columns 22.
In some embodiments of the present application, the fuel cell flow field plate includes a spoiler unit, each spoiler unit includes two spoiler posts 2 in adjacent columns, and two spoiler posts 2 in the same spoiler unit are arranged in a central symmetry manner.
In this embodiment, in the same row, one oblique side of the regular trapezoid of the first spoiler column 21 is parallel to and a certain distance away from one oblique side of the regular trapezoid of the second spoiler column 22 in the adjacent column, and the distance away can be determined according to the actual usage situation of the staggered flow channels.
The first spoiler column 21 is rotated 180 degrees around a certain base point to coincide with the second spoiler column 22.
In some embodiments of the present application, a longitudinal period between the spoiler units is not less than 2mm and not more than 2.4 mm, and a lateral period is not less than 19 mm and not more than 21 mm.
Optionally, the longitudinal period in the turbulence unit is 2.2mm, and the transverse period is 20.16mm.
In some embodiments of the present application, a longitudinal pitch between two spoiler posts 2 in the same spoiler unit is not less than 0.4mm and not more than 0.5 mm, and a lateral pitch is not less than 9mm and not more than 11 mm.
As shown in fig. 2, fig. 2 is a schematic structural diagram of a spoiler column 2 according to an embodiment of the present disclosure.
The turbulent flow unit comprises a first turbulent flow column 21 and a second turbulent flow column 22, wherein the first turbulent flow column 21 takes the middle point of a trapezoid as a rotation center, and the outline of the first turbulent flow column is the same as that of the second turbulent flow column 22 after rotating 180 degrees.
Alternatively, in the same spoiler unit, the longitudinal distance between the first spoiler column 21 and the second spoiler column 22 is 0.45mm, and the transverse distance is 10mm.
For a single turbulent flow column 2, the distance between the upper bottom and the lower bottom is 1.48mm, the included angle alpha between the upper bottom and the inclined side is 161 degrees, the bottom angle of the boss is rounded, the radius R=0.45 mm of the rounded corner, the circle centers of the rounded corners are 9mm apart, and the height of the turbulent flow column 2 is 0.4mm.
In some embodiments of the present application, the spoiler column 2 includes a solid boss protruding from the bottom plate 1 or a hollow groove with a side wall protruding from the bottom plate 1.
In one embodiment, the spoiler column 2 is a solid structure. The flow field plate further comprises a cover plate, the cover plate is relatively attached to the bottom plate 1, a certain gap exists between the cover plate and the bottom plate, the upper surface of the turbulent flow column 2 is in contact with the cover plate, the lower surface of the turbulent flow column is in contact with the bottom plate 1, namely, the gap between the cover plate and the bottom plate 1 is the thickness of the turbulent flow column 2. The spoiler column 2 presents a boss.
In another embodiment, the spoiler column 2 is a hollow structure. The flow field plate further comprises a cover plate, the cover plate is relatively attached to the bottom plate 1 and has a certain gap, and through holes with side walls are formed in the cover plate and the bottom plate 1 and are opposite to the spoiler column 2. After the cover plate is attached to the bottom plate 1, the through holes correspond to each other, and the side walls are connected with each other. The spoiler column 2 presents a groove.
The example was subjected to two-stream transient simulation. The gas flow enters from the right side simultaneously with the liquid water, and the liquid water undulates in the flow field as seen from the flow process (upper left-upper right-lower left-lower right). After the flow is stable, because a small area except for an inlet is provided with some accumulated water near a gas-liquid mixing inlet in the whole flow field, the liquid water in other areas is blown to a liquid water area which basically does not reside along with the staggered disturbance of the airflow, the total water content volume fraction is not more than 0.1% all the time according to calculation, and the water and the air can be smoothly discharged. In the use of an actual fuel cell, liquid water permeates from the lower part of the flow channel and is converged by the air flow, and more liquid water flow is gradually formed at the rear part in the flow field, so that the simulation working condition is worse than the actual cell environment, and the design also has better air flow disturbance and drainage effect in the use of the actual fuel cell.
Compared with the prior art, the method and the device can realize at least the following beneficial effects: in this embodiment of the present application, through arranging the turbulent flow column 2 in the flow channel, the gaseous medium collides with the turbulent flow column 2 when flowing in the flow channel, so as to forcedly split two partial flows, and the two partial flows can be converged with the air flows split in the adjacent upper and lower identical structures. The flow dividing and converging flow is arranged in each area in the flow channel, which is equivalent to adding a plurality of wave-shaped flow channels which continuously exchange gas in the whole flow field, thereby realizing continuous cross mixing disturbance on the gas in different areas in the flow channel, and reducing the pressure difference due to increasing the flow area, and the phenomenon that liquid water in independent flow channels is continuously accumulated and blocked in parallel flow channels or wave-shaped flow channels is avoided, and the generated liquid water is continuously collided and separated along with the separation and the combination of the gas flows, so that smaller liquid drop state is kept in the flow field as much as possible, and the liquid water can be more conveniently discharged. The method realizes continuous staggered and split flow disturbance of the gaseous medium in the flow field on the turbulent flow column 2, thereby enhancing the drainage effect and the power generation performance of the liquid medium.
In the description of the present application, the directions or positional relationships indicated by the words "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on the exemplary directions or positional relationships shown in the drawings, are for convenience of description or simplifying the description of the embodiments of the present application, and do not indicate or imply that the apparatus or components referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. 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 application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.
Those of skill in the art will appreciate that the various operations, methods, steps in the flow, actions, schemes, and alternatives discussed in the present application may be alternated, altered, combined, or eliminated. Further, other steps, means, or steps in a process having various operations, methods, or procedures discussed in this application may be alternated, altered, rearranged, split, combined, or eliminated. Further, steps, measures, schemes in the prior art with various operations, methods, flows disclosed in the present application may also be alternated, altered, rearranged, decomposed, combined, or deleted.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited in order and may be performed in other orders, unless explicitly stated herein. Moreover, at least some of the steps in the flowcharts of the figures may include a plurality of sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, the order of their execution not necessarily being sequential, but may be performed in turn or alternately with other steps or at least a portion of the other steps or stages.
The foregoing is only a part of the embodiments of the present application, and it should be noted that, for those skilled in the art, other similar implementation means based on the technical ideas of the present application are adopted without departing from the technical ideas of the solutions of the present application, and also belong to the protection scope of the embodiments of the present application.

Claims (10)

1. A fuel cell flow field plate comprising:
a base plate having an inlet and an outlet, a flow path being formed between the inlet and the outlet;
the turbulent flow columns protrude out of the surface of the bottom plate and are uniformly distributed in the flow channel;
the front projection outline of at least one vortex column on the bottom plate is of a trapezoid structure, and the trapezoid structure comprises at least two fillets.
2. The fuel cell flow field plate of claim 1, wherein the flow channels comprise parallel flow channels, the inlet and the outlet are located at opposite ends of the parallel flow channels, respectively, and the cross-sectional area of the inlet is equal to the cross-sectional area of the outlet.
3. The fuel cell flow field plate of claim 2, wherein the orthographic projection profile of the turbulator post on the bottom plate is an axisymmetric regular trapezoid, and both the upper and lower bases of the regular trapezoid are parallel to the extending direction of the flow channels.
4. The fuel cell flow field plate of claim 1, wherein a gap exists between two adjacent ones of said flow-disturbing columns in a same column, at least one of said flow-disturbing columns in an adjacent column being flush with said gap.
5. The fuel cell flow field plate of claim 1, wherein the orthographic projection profile of at least two of the flow-disturbing columns in a same column on the bottom plate is identical.
6. The fuel cell flow field plate of claim 1, wherein the profile of the flow-disturbing columns in the odd columns is in the opposite direction to the profile of the flow-disturbing columns in the even columns.
7. The fuel cell flow field plate of claim 6, comprising flow-disturbing elements, each flow-disturbing element comprising two flow-disturbing columns in adjacent rows, two flow-disturbing columns in the same flow-disturbing element being arranged in central symmetry.
8. The fuel cell flow field plate of claim 7, wherein the longitudinal period between the flow-disturbing elements is not less than 2mm and not more than 2.4 mm, and the transverse period is not less than 19 mm and not more than 21 mm.
9. The fuel cell flow field plate of claim 7, wherein a longitudinal spacing between two of the turbulators in a same one of the turbulators is no less than 0.4mm and no more than 0.5 mm, and a transverse spacing is no less than 9mm and no more than 11 mm.
10. The fuel cell flow field plate of claim 1, wherein the turbulator posts comprise solid bosses protruding from the bottom plate or hollow grooves with side walls protruding from the bottom plate.
CN202310431416.8A 2023-04-20 2023-04-20 Fuel cell flow field plate Pending CN116565246A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310431416.8A CN116565246A (en) 2023-04-20 2023-04-20 Fuel cell flow field plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310431416.8A CN116565246A (en) 2023-04-20 2023-04-20 Fuel cell flow field plate

Publications (1)

Publication Number Publication Date
CN116565246A true CN116565246A (en) 2023-08-08

Family

ID=87495603

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310431416.8A Pending CN116565246A (en) 2023-04-20 2023-04-20 Fuel cell flow field plate

Country Status (1)

Country Link
CN (1) CN116565246A (en)

Similar Documents

Publication Publication Date Title
US5944094A (en) Dry-air-surface heat exchanger
CN101944618B (en) Tree-structured flow field proton exchange membrane fuel cell bipolar plate
CA2578009A1 (en) Fuel cell having buffer with inclined surface
JP2020092092A (en) Fuel cell cooling plate
US11811103B2 (en) Separator plate for an electrochemical system
KR101569366B1 (en) Fill for cross flow type of cooling tower
KR20080034192A (en) Separator for fuel cell and fuel cell
CN105305226A (en) Microchannel heatsink having backwater layer provided with staggered inclined cylindrical flow-disturbing ridges
KR20060013421A (en) Fuel cell and heating device for a fuel cell
CN116565246A (en) Fuel cell flow field plate
CN114109516A (en) Turbine blade end wall cooling structure
CN103296329B (en) A kind of power supply chiller
JPH02129858A (en) Cooling plate for fuel cell
US8338048B2 (en) Fuel cell
CN114318391A (en) Novel electrolytic cell electrode plate with optimized structure, electrolytic unit and application
US9506483B2 (en) Fluid tube increasing uniformity of fluid flow and apparatus including the same
JP2008226811A (en) Fuel cell
CN115507681B (en) Plate heat exchanger
JP4191783B2 (en) Fuel cell separator and fuel cell
JP2023501300A (en) Lattice-like symmetrical distributing or collecting elements
JP2007207744A (en) Separator for fuel cell, and fuel cell
CN111540925B (en) Single fuel cell, fuel cell stack and working mode
CN115275248A (en) Fuel cell and bipolar plate assembly thereof
CN116565247A (en) Proton exchange membrane fuel cell flow field plate
JP5373468B2 (en) Cooling tower filler and filler sheet

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination