CN116454309A - Connector for solid oxide fuel cell - Google Patents
Connector for solid oxide fuel cell Download PDFInfo
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- CN116454309A CN116454309A CN202310453441.6A CN202310453441A CN116454309A CN 116454309 A CN116454309 A CN 116454309A CN 202310453441 A CN202310453441 A CN 202310453441A CN 116454309 A CN116454309 A CN 116454309A
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- 238000002407 reforming Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 16
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- 238000003487 electrochemical reaction Methods 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims description 19
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- 230000000694 effects Effects 0.000 description 5
- 229910021529 ammonia Inorganic materials 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
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- 238000007789 sealing Methods 0.000 description 3
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Classifications
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- 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
- H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
-
- 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
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
- H01M8/1231—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte with both reactants being gaseous or vaporised
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- 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
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
- H01M8/124—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte
- H01M8/1246—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte the electrolyte consisting of oxides
-
- 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
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
- H01M2008/1293—Fuel cells with solid oxide electrolytes
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention provides a connector for a solid oxide fuel cell, which is used for a large-size flat plate type solid oxide fuel cell, and is provided with a plurality of groups of S-shaped parallel flow channels, wherein the heat absorbed by reforming the first half part of fuel in each group of S-shaped fuel gas channels can be provided by heat release of fuel electrochemical reaction in other groups of S-shaped gas channels; the distributed utilization of reforming heat absorption can be realized by designing a plurality of groups of parallel short flow channels, the concentration of a heat absorption area is reduced, the uniformity of the temperature distribution in the battery is effectively improved, the thermal stress in the battery is reduced, and the flow resistance and the auxiliary power consumption can be effectively reduced; the self-heating feedback design can also improve the power of the battery, and the technical route has low cost and simple process; compared with the prior art, the internal flow passage of the connector of the solid oxide fuel cell with the internal reforming fuel is optimally designed.
Description
Technical Field
The invention relates to the field of solid oxide fuel cells, in particular to a connector for a solid oxide fuel cell.
Background
The Solid Oxide Fuel Cell (SOFC) is used as a novel energy conversion technology, can realize the direct conversion of chemical energy into electric energy, is not limited by Carnot cycle, and greatly improves the energy conversion efficiency. SOFCs have many advantages over other fuel cells: the energy density is high, the output power is high, and the energy source device can be used for mobile equipment and large-scale energy equipment; the method can directly use carbon-based fuels such as natural gas, synthetic gas, blast furnace gas and the like, has wide sources, is convenient to transport and store and is safe to use; noble metals are not needed as catalysts, and common metals such as nickel, copper, ceramic materials and the like are used for reducing the cost; the medium-temperature and high-temperature operation can generate high-quality heat energy, can be combined with a gas turbine and a steam turbine to form lower circulation or upper circulation, and can realize cogeneration so as to realize energy cascade utilization; the fuel cell is safer and more reliable than a molten carbonate fuel cell without liquid corrosive medium.
SOFC stacks operate at high temperatures with strong coupling of internal flow, heat transfer, and electrochemical reaction processes, and internal thermal management of the cell is an important aspect of cell design. Uneven thermal stress can be generated due to uneven temperature distribution in the electric pile, so that the sealing performance of the electric pile is directly affected, and the service life of a battery is reduced. Thermal management inside the cell includes both reaction heat generation and flow heat exchange. On the one hand, the electrochemical reaction process of the fuel in the cell can simultaneously generate and release a large amount of heat, so that the local temperature is increased; on the other hand, combustion at lower temperatures, typically by being piled up, is usedThe flow of the material gas or air in the polar plate flow channel can absorb heat and carry the heat out, so as to realize battery cooling. The flow and distribution conditions of fuel gas and air in the bipolar plate flow channels of the battery not only can influence the electrochemical reaction exothermic process in the electric pile, but also can influence the cooling effect, and are key to carrying out the heat design of the battery. Ammonia (NH) 3 ) The fuel is an emerging zero-carbon fuel, and has the dual advantages of energy conservation and emission reduction when being applied to SOFC power generation. And NH 3 Compared with the conventional hydrocarbon fuel (such as methane and the like), the fuel has unique advantages that carbon deposition is not generated in the cracking process, and the reforming cracking reaction can be directly carried out in the fuel cell, so that an external reformer can be omitted, the system is simplified, and the cost is reduced. However, the endothermic effect of direct internal reforming of ammonia and the exothermic heat of electrochemical reactions bring about higher temperature differentials than hydrogen SOFCs, which are more difficult to thermally manage and require special design.
At present, reports on heat exchange design of SOFC bipolar plates and flow channels are very limited. Among them, officer and soldier et al put forward a SOFC connector structure in domestic patent application CN115000455A, and it forms gradual change type runner structure that air runner quantity gradually reduces according to the flow direction of air current through the change of long rib and short rib quantity and arrangement mode in every runner subregion on the snakelike runner to increase the flow velocity of air in the runner, reduce the inside temperature of battery, reduce the thermal stress that the battery receives inside. However, the method can only realize unidirectional cooling, which can cause adverse effects such as uneven cooling, and additionally increase cooling flow channels, which can also increase auxiliary machine power consumption and have low regulation and control degrees of freedom. Liu Shaoming et al propose a SOFC connector structure in domestic patent application CN112397743A, its inside is equipped with the internal flow channel that supplies cooling gas to pass through, can effectually carry out thermal management to the electric pile, avoids producing too big temperature gradient in the electric pile, can reduce the air mass flow of cathode side simultaneously, improves the effective utilization ratio of air, improves system efficiency to the life-span of extension connector. But the cooling gas channel is added to realize the internal cooling of the battery, so that the processing technology is complex. In addition to the improved flow channel arrangement described above, chen Shuoshuo et al in the domestic patent application CN109755608B disclose a solid oxide fuel cell connector comprising a cathode plate, an anode plate and a sealing interlayer disposed between the cathode plate and the anode plate, the sealing interlayer being provided with a high temperature heat pipe therein; the high-temperature heat pipe comprises a capillary core and a working medium. The embedded heat pipe design is adopted to reduce the temperature gradient in the SOFC electric pile, optimize the electric pile heat management efficiency and improve the capacity of the electric pile for bearing rapid temperature rise. Tu Zhengkai et al in domestic patent application CN115188983a disclose a SOFC bipolar plate connector, the front face of the connector being provided with a front flow field, the back face of the connector being provided with a back flow field; the front flow field is divided into four first flow fields with the same structure, the back flow field is divided into four second flow fields with the same structure, and the first flow fields and the second flow fields corresponding to the right lower part of the first flow fields are in a rotationally symmetrical structure; an L-shaped flow channel is arranged in the first flow field, gas inlets and outlets are arranged at two ends of the L-shaped flow channel, and reaction gas enters the L-shaped flow channel through one gas inlet and outlet and flows out from the other gas inlet and outlet. The bipolar plate connector of the solid oxide fuel cell has a simple structure, is provided with an L-shaped flow channel, improves the uniformity of reaction heat release by improving the uniformity of air flow distribution, and ensures that the temperature in a cell stack is lower and the distribution is more uniform so as to achieve the purpose of reducing the temperature gradient in the cell. However, this method only considers the exothermic reaction process, and does not consider the cooling process, which has limited effect.
Other reports on SOFC bipolar plate and runner designs have been found to take improvement of gas flow distribution uniformity as a starting point. Hong Weirong et al in domestic patent application CN115642269a propose a SOFC cell structure, in which two layers of gas passages in a well-shaped structure are provided inside the anode substrate, and the inside of each layer of gas passage is mutually communicated; the anode current collecting strips are arranged along the central line of the width direction of the anode matrix; the cathode connector is provided with a plurality of ribs which are arranged at intervals on one side facing the cathode, and the width of the ribs is gradually enlarged along the gas flow direction, so that the width of an air passage in the gas flow direction is gradually reduced. The aim is to reduce the ohmic losses of current transport on the anode substrate and to improve the output performance and durability of the cell, and no consideration or design is given to heat exchange cooling. Wu Gejin et al disclose in the domestic patent application CN1635653A a novel medium temperature solid oxide fuel cell bipolar plate and application thereof, the bipolar plate is formed by fixedly connecting an anode runner plate, a partition plate, a cathode runner plate and a cathode flow field plate which are identical in shape and size in sequence, gas channels are respectively arranged at the periphery of each plate, and the corresponding gas channels between the plates are mutually communicated. Shu Zhenglong et al in domestic patent application CN114927714a propose a connection for SOFCs. The connecting body is provided with a two-stage turbulent flow structure, a plurality of groups of runner groups which are arranged in a ladder shape and are independent from each other are matched, each runner group also comprises a plurality of runners, and two ends of each runner group are respectively provided with an independent second turbulent flow groove structure, so that the uniformity of the content of fluid entering each runner can be maintained in the whole process from entering to exiting. However, these practical problems only consider the uniformity of gas distribution, and are not designed for the thermal management of SOFCs, which are prone to uneven distribution of thermal stress inside the cell, and reduce the service life of the cell, and improvement is needed.
Disclosure of Invention
The invention provides a connector for a solid oxide fuel cell, which is characterized in that in the operation of a direct ammonia fuel cell, ammonia fuel firstly generates cracking reaction to absorb heat and then generates electrochemical reaction to release heat after entering the cell, the heat complementary effect exists between the early stage heat absorption process and the later stage heat release process, the heat release reaction area is cooled by utilizing the early stage heat absorption effect through reasonable design, and self-absorption heat cooling is realized to improve the internal temperature uniformity of the cell.
In order to solve the problems, the technical scheme provided by the invention is as follows:
the embodiment of the invention provides a connector for a solid oxide fuel cell, which comprises a polar plate body, wherein the polar plate body comprises a first end part and a second end part, the first end part is provided with a first through hole, the second end part is provided with a second through hole, and a plurality of flow channel groups are arranged between the first through hole and the second through hole;
the polar plate body further comprises a first drainage groove and a second drainage groove, the first through hole is communicated with inlets of the flow channel groups through the first drainage groove, and the second through hole is communicated with outlets of the flow channel groups through the second drainage groove;
each S-shaped parallel flow passage comprises a first linear flow passage, a second linear flow passage and a third linear flow passage which are arranged in parallel, a first turning flow passage communicated between the first linear flow passage and the second linear flow passage, and a second turning flow passage communicated between the second linear flow passage and the third linear flow passage;
in each S-shaped parallel flow passage, the first linear flow passage is a reforming endothermic reaction zone of fuel, and the third linear flow passage is an electrochemical exothermic reaction zone of fuel; in the process that fuel flows through the adjacent three flow channel groups, heat absorption of a first linear flow channel of the second flow channel group is provided by heat release of a third linear flow channel of the first flow channel group, and heat release of the third linear flow channel of the second flow channel group is absorbed by the first linear flow channel of the third flow channel group, so that heat matching of gas reforming heat absorption and electrochemical reaction heat release in the polar plate body is realized.
According to an alternative embodiment of the invention, each of the flow channel groups consists of a single S-shaped parallel flow channel or more than two S-shaped parallel flow channels.
According to an alternative embodiment of the present invention, a plurality of the flow channel groups are arranged in parallel.
According to an alternative embodiment of the present invention, the first diversion flow passage and the second diversion flow passage are straight line segments or arc segments.
According to an alternative embodiment of the present invention, the ratio of the area of all the flow channel groups to the area of the corresponding part of the polar plate body ranges from 0.5 to 2.
According to an alternative embodiment of the invention, in each S-shaped parallel flow channel, the gradient of the first, second and third straight flow channels ranges between 0 ° -30 °.
According to an alternative embodiment of the present invention, the first through hole and the second through hole are located on two sides of the plurality of flow channel groups.
According to an alternative embodiment of the present invention, the first through holes and the second through holes are disposed on diagonal lines on two sides of the plurality of flow channel groups.
According to an alternative embodiment of the present invention, the cross section of the S-shaped parallel flow channels in each flow channel group is one of rectangular, triangular, trapezoidal, elliptical and circular; the first through hole, the second through hole, the first drainage groove and the second drainage groove are rectangular, triangular, trapezoidal, elliptic and circular.
According to an alternative embodiment of the invention, the material of the polar plate body is SUS430, crofer22APU,One or more of the following; and one or more materials selected from spinel, active oxide coating and perovskite coating are sprayed on the surfaces of the flow channel groups.
The beneficial effects are that: the embodiment of the invention provides a connector for a solid oxide fuel cell, which is provided with a polar plate body of a self-heat-absorption cooling flow channel, and aims to carry out heat matching design of reforming heat absorption and electrochemical reaction heat release. Compared with the existing long-flow back-shaped flow channels, the invention can realize the distributed utilization of reforming heat absorption by designing a plurality of groups of parallel short-flow channels, reduce the concentration of heat absorption areas, effectively improve the uniformity of temperature distribution inside the battery, reduce the thermal stress inside the battery, effectively reduce the flow resistance and the auxiliary power consumption, and the self-heating feedback design can also improve the power of the battery.
Drawings
In order to more clearly illustrate the embodiments or the technical solutions in the prior art, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic front view of a connector for a solid oxide fuel cell according to an embodiment of the present disclosure.
Fig. 2 is an enlarged schematic view of a single S-shaped parallel flow channel in a connector for a solid oxide fuel cell according to an embodiment of the present application.
Fig. 3 is an enlarged schematic view of another single S-shaped parallel flow channel in a connector for a solid oxide fuel cell according to an embodiment of the present application.
Fig. 4 is a schematic view of heat flow in yet another single S-shaped parallel flow channel in a connector for a solid oxide fuel cell according to an embodiment of the present application.
Fig. 5 is a schematic view of heat flow in a single S-shaped parallel flow channel in a connector for a solid oxide fuel cell according to an embodiment of the present application.
Fig. 6 is a schematic front view of another connector for a solid oxide fuel cell according to an embodiment of the present disclosure.
Fig. 7 is an enlarged schematic view of a single S-shaped parallel flow channel in another connector for a solid oxide fuel cell according to an embodiment of the present application.
Labeling: the electrode plate comprises an electrode plate body 100, a first end part 200, a second end part 300, a first through hole 1, a second through hole 2, a third through hole 3, a fourth through hole 4, a first drainage groove 11, a second drainage groove 12, a flow channel group 101 and an S-shaped parallel flow channel 111.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the description of the present application, it should be understood that the terms "longitudinal," "transverse," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "straight line," and the like indicate an orientation or a positional relationship based on that shown in the drawings, merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a 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 features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. In the present application, "/" means "or" in the meaning. In the drawings, like elements are denoted by the same reference numerals, and broken lines in the drawings indicate that they are not present in the structure, and only the shape and position of the structure are described. The present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed.
The embodiment of the application provides a connector for solid oxide fuel cell, the connector includes the polar plate body, and the polar plate body includes first tip and second tip, and first tip is provided with first through-hole, and the second tip is provided with the second through-hole, is provided with a plurality of runner groups between first through-hole and the second through-hole. The polar plate body still includes first drainage groove and second drainage groove, and first through-hole passes through the entry intercommunication of first drainage groove and a plurality of runner group, and the second through-hole passes through the export intercommunication of second drainage groove and a plurality of runner group.
Each flow channel group consists of an S-shaped parallel flow channel, and each flow channel group in the embodiment consists of a single S-shaped parallel flow channel. Each S-shaped parallel flow passage comprises a first linear flow passage, a second linear flow passage and a third linear flow passage which are arranged in parallel, a first turning flow passage communicated between the first linear flow passage and the second linear flow passage, and a second turning flow passage communicated between the second linear flow passage and the third linear flow passage. In each S-shaped parallel flow passage, a first straight flow passage is a reforming endothermic reaction zone of fuel, and a third straight flow passage is an electrochemical exothermic reaction zone of fuel; in the process that fuel flows through the adjacent three flow channel groups, heat absorption of a first linear flow channel of the second flow channel group is provided by heat release of a third linear flow channel of the first flow channel group, and heat release of the third linear flow channel of the second flow channel group is absorbed by the first linear flow channel of the third flow channel group, so that heat matching of gas reforming heat absorption and electrochemical reaction heat release in the polar plate body is realized.
The present embodiment provides a new structure of a connector for a solid oxide fuel cell for internally reforming fuel, the fuel gas undergoing two stages in the flow channels: the reforming endothermic reaction in the first half section reacts with the electrochemical exothermic reaction of the reformed fuel in the second half section. The heat absorption of the first half of the fuel gas can be provided by the heat release of the second half of the electrochemical reaction of the adjacent flow channel group, and the heat release of the second half of the fuel gas can be absorbed by the first half reforming heat absorption reaction of the adjacent flow channel group. The distributed cooling and self-heating feedback in the battery can be realized, the efficient heat management in the battery is realized, the heat stress distribution in the battery is reduced, the pressure loss is small, and the service life of the battery can be prolonged.
Example 1
As shown in fig. 1, a schematic front view of a connector for a solid oxide fuel cell according to an embodiment of the present application is provided. The connector comprises a polar plate body 100, wherein the polar plate body 100 is made of SUS430, crofer22APU,One or more of the following. Preferably, the plate body 100 is made of SUS430 material.
The electrode plate body 100 includes a first end 200 and a second end 300, the first end 200 is provided with a first through hole 1 and a fourth through hole 4, the second end 300 is provided with a second through hole 2 and a third through hole 3, and the fourth through hole 4 and the third through hole 3 are spare through holes. A plurality of flow channel groups 101 are arranged between the first through holes and the second through holes; the plurality of flow channel groups 101 are preferably arranged horizontally on the plate body 100. The first through hole 1, the second through hole 2, the third through hole 3 and the fourth through hole 4 are preferably arranged throughout the whole electrode plate body 100. The first through holes 1 and the second through holes 2 are positioned at both sides of the plurality of flow channel groups. Preferably, the first through holes 1 and the second through holes 2 are disposed on diagonal lines on both sides of the plurality of flow channel groups 101.
The electrode plate body 100 further comprises a first drainage groove 11 and a second drainage groove 12, the first drainage groove 11 is preferably a groove, the second drainage groove 12 is preferably a groove, the first through hole 1 is communicated with inlets of the plurality of runner groups 101 through the first drainage groove 11, and the second through hole 2 is communicated with outlets of the plurality of runner groups 101 through the second drainage groove 12.
The first through hole 1, the second through hole 2, the first drainage groove 11 and the second drainage groove 12 are rectangular, triangular, trapezoidal, elliptic and circular, or a diversion plate-shaped diversion channel can be additionally arranged, preferably, the first through hole 1 and the second through hole 2 are rectangular, and the first drainage groove 11 and the second drainage groove 12 are triangular.
Each flow channel group 101 is composed of S-shaped parallel flow channels 111, and the surfaces of the plurality of flow channel groups 10 are sprayed with one or more of spinel, active oxide coating and perovskite coating. Preferably, the surfaces of the plurality of runner groups 10 are sprayed with LSM coating. The section of the S-shaped parallel flow passage in each flow passage group is one of rectangle, triangle, trapezoid, ellipse and circle; preferably, the cross section of the S-shaped parallel flow channels in each flow channel group is rectangular. The ratio of the area of all the flow channel groups 101 to the area of the corresponding part of the polar plate body ranges from 0.5 to 2. Preferably, the ratio of the area of all the flow channel groups 101 to the area of the corresponding partial polar plate body is 1.
The S-shaped parallel flow channels 111 in the plurality of flow channel groups 101 are preferably identical in shape and length. As shown in fig. 2, each of the S-shaped parallel flow passages 111 includes a first straight flow passage 111-2, a second straight flow passage 111-4, and a third straight flow passage 111-6 arranged in parallel with each other, a first diverting flow passage 111-3 communicating between the first straight flow passage 111-2 and the second straight flow passage 111-4, and a second diverting flow passage 111-5 communicating between the second straight flow passage 111-4 and the third straight flow passage 111-6; the end of the first straight flow channel 111-2 is provided with an inlet 111-1, the end of the third straight flow channel 111-6 is provided with an outlet 111-7, and both the inlet 111-1 and the outlet 111-7 are rectangular. The first diverting flow path 111-3 and the second diverting flow path 111-5 are straight line segments.
The first, second and third linear flow passages 111-2, 111-4, 111-6 have slopes ranging from 0 deg. -30 deg.. Preferably, the slopes of the first, second and third straight flow passages 111-2, 111-4 and 111-6 are 0 °.
As shown in fig. 3, the first diversion flow passage 111-3 and the second diversion flow passage 111-5 are arc sections, and other structures are similar to those of fig. 2, and will not be repeated here. As shown in FIG. 4, the inlet 111-1 and the outlet 111-7 are horn-shaped, and the other structures are similar to those of FIG. 2, and will not be repeated here.
Referring to fig. 3 in combination with fig. 5, in one S-shaped parallel flow channel 111, the first straight flow channel 111-2 is a reforming endothermic reaction zone of fuel, and is also a low temperature zone in fig. 3; the third linear flow channel 111-6 is an electrochemical exothermic reaction zone of fuel, and is also a high temperature zone in fig. 3, the high temperature hot flow of the third linear flow channel 111-6 flows from bottom to top, and the low temperature hot flow of the first linear flow channel 111-2 cools the lower heat flow from top to bottom.
During the process of fuel flowing through the adjacent three flow channel groups, the heat absorption of the first linear flow channel 111-2 of the second flow channel group is provided by the heat release of the third linear flow channel 111-6 of the first flow channel group, and the heat release of the third linear flow channel 111-6 of the second flow channel group is absorbed by the first linear flow channel 1111-2 of the third flow channel group, so that the heat absorption of the gas reforming inside the polar plate body is matched with the heat release of the electrochemical reaction.
Example 2
As shown in fig. 6, a schematic front view of another connector for a solid oxide fuel cell according to an embodiment of the present application is provided. Each flow channel group 101 in this embodiment is composed of two S-shaped parallel flow channels 111, and other structures are similar to those in fig. 1, and will not be described here again.
Referring to fig. 7 in combination with fig. 6, in one flow path group 101, the flow path group 101 includes a first S-shaped parallel flow path including a first straight flow path 111-21, a second straight flow path 111-41, and a third straight flow path 111-61 arranged in parallel with each other, a first diverting flow path 111-31 communicating between the first straight flow path 111-21 and the second straight flow path 111-41, and a second diverting flow path 111-51 communicating between the second straight flow path 111-41 and the third straight flow path 111-61. The second S-shaped parallel flow passage comprises a first straight flow passage 111-22, a second straight flow passage 111-42 and a third straight flow passage 111-62 which are arranged in parallel, a first turning flow passage 111-32 communicated between the first straight flow passage 111-22 and the second straight flow passage 111-42, and a second turning flow passage 111-52 communicated between the second straight flow passage 111-42 and the third straight flow passage 111-62. The flow channel group 101 is further provided with an inlet 111-1 and an outlet 111-7, and the inlet 111-1 and the outlet 111-7 are rectangular or trumpet-shaped. The first diversion flow passage and the second diversion flow passage are straight line segments or arc segments.
In other embodiments each flow channel group consists of more than two S-shaped parallel flow channels.
The electrode plate body is made of SUS430, crofer22APU,One or more of the following; the surfaces of the flow channel groups are sprayed with one or more of spinel, active oxide coating and perovskite coating.
In other embodiments, the air side flow channels on the plate body may be the same as the fuel side flow channels, and other types of flow channel designs, such as parallel gas flow channels, may be used. The air-side air flow direction may be the same as the fuel-side air flow direction or may be opposite to the fuel-side air flow direction. Preferably, the air side flow channel of the polar plate body adopts the same flow channel as the fuel side, and the flow direction is opposite to the fuel side.
In summary, although the present invention has been described in terms of the preferred embodiments, the above-mentioned embodiments are not intended to limit the invention, and those skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention, so that the scope of the invention is defined by the appended claims.
Claims (10)
1. A connector for a solid oxide fuel cell, the connector comprising a plate body, the plate body comprising a first end and a second end, the first end being provided with a first through hole, the second end being provided with a second through hole, a plurality of flow channel groups being provided between the first through hole and the second through hole;
the polar plate body further comprises a first drainage groove and a second drainage groove, the first through hole is communicated with inlets of the flow channel groups through the first drainage groove, and the second through hole is communicated with outlets of the flow channel groups through the second drainage groove;
each S-shaped parallel flow passage comprises a first linear flow passage, a second linear flow passage and a third linear flow passage which are arranged in parallel, a first turning flow passage communicated between the first linear flow passage and the second linear flow passage, and a second turning flow passage communicated between the second linear flow passage and the third linear flow passage;
in each S-shaped parallel flow passage, the first linear flow passage is a reforming endothermic reaction zone of fuel, and the third linear flow passage is an electrochemical exothermic reaction zone of fuel; in the process that fuel flows through the adjacent three flow channel groups, heat absorption of a first linear flow channel of the second flow channel group is provided by heat release of a third linear flow channel of the first flow channel group, and heat release of the third linear flow channel of the second flow channel group is absorbed by the first linear flow channel of the third flow channel group, so that heat matching of gas reforming heat absorption and electrochemical reaction heat release in the polar plate body is realized.
2. The connection for a solid oxide fuel cell according to claim 1, wherein each of the flow channel groups is composed of a single S-shaped parallel flow channel or two or more S-shaped parallel flow channels.
3. The connector for solid oxide fuel cell according to claim 1, wherein a plurality of the flow channel groups are arranged in parallel.
4. The connection for a solid oxide fuel cell of claim 1, wherein the first redirecting flow channel and the second redirecting flow channel are straight or arcuate segments.
5. The connector for solid oxide fuel cells of claim 1, wherein a ratio of an area of all of the flow channel groups to an area of a corresponding part of the plate body ranges from 0.5 to 2.
6. The connection for a solid oxide fuel cell of claim 1, wherein in each S-shaped parallel flow passage, the first, second and third linear flow passages have a slope in the range of 0 ° -30 °.
7. The connection body for a solid oxide fuel cell according to claim 1, wherein the first through hole and the second through hole are located on both sides of a plurality of the flow passage groups.
8. The connection body for a solid oxide fuel cell according to claim 7, wherein the first through hole and the second through hole are provided on diagonal lines on both sides of a plurality of the flow passage groups.
9. The connection body for a solid oxide fuel cell according to claim 1, wherein the cross section of the S-shaped parallel flow channels in each flow channel group is one of rectangular, triangular, trapezoidal, elliptical and circular; the first through hole, the second through hole, the first drainage groove and the second drainage groove are rectangular, triangular, trapezoidal, elliptic and circular.
10. The connector for solid oxide fuel cell according to claim 1, wherein the plate body is made of SUS430, crofer22APU,232G 10; and one or more materials selected from spinel, active oxide coating and perovskite coating are sprayed on the surfaces of the flow channel groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310453441.6A CN116454309A (en) | 2023-04-25 | 2023-04-25 | Connector for solid oxide fuel cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310453441.6A CN116454309A (en) | 2023-04-25 | 2023-04-25 | Connector for solid oxide fuel cell |
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| CN116454309A true CN116454309A (en) | 2023-07-18 |
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| KR101410478B1 (en) * | 2012-12-28 | 2014-06-27 | (주)퓨얼셀 파워 | Fuel cell and pemfc bipolar plate and method for manufacturing pemfc bipolar plate |
| CN115354262A (en) * | 2022-09-22 | 2022-11-18 | 上海氢程科技有限公司 | Preparation method of metal connector for solid oxide battery and metal connector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20050191539A1 (en) * | 2004-02-26 | 2005-09-01 | Mitsubishi Denki Kabushiki Kaisha | Fuel cell |
| CN2893939Y (en) * | 2006-04-12 | 2007-04-25 | 中国科学院大连化学物理研究所 | Proton exchange film fuel battery flow field structure |
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| KR20110008925A (en) * | 2009-07-21 | 2011-01-27 | 고등기술연구원연구조합 | Flow channel plate for fuel cell |
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