CN115613063A - Flat-plate type solid oxide electrolytic cell stack - Google Patents
Flat-plate type solid oxide electrolytic cell stack Download PDFInfo
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- CN115613063A CN115613063A CN202211620979.3A CN202211620979A CN115613063A CN 115613063 A CN115613063 A CN 115613063A CN 202211620979 A CN202211620979 A CN 202211620979A CN 115613063 A CN115613063 A CN 115613063A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/70—Assemblies comprising two or more cells
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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 invention provides a flat plate type solid oxide electrolytic cell stack, belongs to the technical field of solid oxide electrolytic cells, and solves the problems of poor integration level, poor high-temperature sealing performance, poor gas distribution uniformity and poor impact resistance of the stack in the prior art. The electric pile comprises a front end plate, an anode plate, a repeating unit, a cathode plate and a rear end plate which are connected in sequence. Wherein, the repeating unit includes the battery pack unit of multiunit range upon range of, and each battery pack unit all is equipped with battery sealing pad, battery, connecting plate, the runner plate that connects gradually. The connecting plate adopts a hollow outer frame structure, the runner plate is provided with a runner with a matrix concave-convex structure, and the connecting plate and the runner plate are sealed on one side of the battery in sequence by laser welding so as to form a fuel air cavity inside the battery pack unit; the battery sealing gasket is sealed at the other side of the battery and covers the edge of the battery, so that an air cavity is formed outside the battery pack unit. The rear end plate is provided with a fuel gas inlet and outlet and an air inlet and outlet.
Description
Technical Field
The invention relates to the technical field of solid oxide electrolytic cells, in particular to a flat plate type solid oxide electrolytic cell stack.
Background
The hydrogen energy and fuel cell technology is an important innovative technology for promoting economic society to realize low-carbon environmental protection development, and is a strategic choice for China to deal with global climate change, ensure national energy supply safety and realize sustainable development.
The electrolysis of water by a Solid Oxide Electrolysis Cell (SOEC) to produce hydrogen is not accompanied by any pollution and greenhouse gas emissions. The SOEC reactor runs at high temperature (600-800 ℃), and has the advantages of using a cheap nickel electrode due to the dynamic advantages, having various structural designs and mainly adopting two types, namely a tubular type and a flat type. Compared with a tubular structure, the flat plate structure has the advantages of simple preparation process, low manufacturing cost, shorter current acquisition flow, higher power density and better superiority.
At present, a series of problems of poor pile integration level, poor high-temperature sealing performance, poor gas distribution uniformity, poor impact resistance and the like exist in the application process of the conventional flat-plate SOEC pile.
Disclosure of Invention
In view of the above analysis, the embodiment of the present invention is directed to provide a planar solid oxide electrolytic cell stack, so as to solve the problems of poor integration level, poor high-temperature sealing performance, poor gas distribution uniformity, and poor impact resistance of the prior art stack.
The embodiment of the invention provides a flat-plate type solid oxide electrolytic cell pile, which comprises a front end plate, an anode plate, a repeating unit, a cathode plate and a rear end plate which are sequentially connected; wherein the content of the first and second substances,
the repeating unit comprises a plurality of groups of stacked battery pack units, and each battery pack unit is provided with a battery sealing gasket, a battery, a connecting plate and a runner plate which are connected in sequence; the connecting plate adopts a hollow outer frame structure, the runner plate is provided with a runner with a matrix concave-convex structure, and the connecting plate and the runner plate are welded and sealed on one side of the battery in sequence to form a fuel air cavity inside the battery pack unit; the battery sealing gasket is sealed at the other side of the battery and covers the edge of the battery so that an air cavity is formed outside the battery pack unit;
the rear end plate is provided with a fuel gas inlet and outlet communicated with the fuel gas cavity and an air inlet and outlet communicated with the air cavity.
The beneficial effects of the above technical scheme are as follows: different structural designs are carried out on the solid oxide electrolytic cell pile, the repeating units are integrated, and the anode plate and the cathode plate are respectively arranged at two ends of the repeating units, so that the integration level is higher, the high-temperature sealing performance is better, and the gas distribution uniformity is also better. Because the battery sealing gaskets are arranged between the battery pack units, the shock resistance is better.
Based on the further improvement of the device, the electrolytic cell stack also comprises a pressurizing component for pressurizing and sealing the electrolytic cell stack; wherein, the first and the second end of the pipe are connected with each other,
the pressurizing component further comprises a cover-shaped nut, a nut gasket, a T-shaped screw and a screw gasket; the T-shaped screw is combined with the rear end plate through the screw gasket, the rod body of the T-shaped screw is arranged in an air cavity channel of the electrolytic cell stack, and the T-shaped screw penetrates out of the front end plate and then is fixed through the nut gasket and the cover nut in a pressurizing mode.
Furthermore, the electrolytic cell stack also comprises a front end plate sealing gasket and a rear end plate sealing gasket; wherein the content of the first and second substances,
the front end plate sealing gasket is arranged between the front end plate and the anode plate and used for realizing the electrical isolation of the front end plate and the anode plate;
the back end plate sealing gasket is arranged between the back end plate and the cathode plate and used for realizing the electrical isolation of the back end plate and the cathode plate, and an air channel leading to the air cavity of the electrolytic cell stack and a fuel gas channel of the fuel gas cavity are formed between the back end plate and the back end plate sealing gasket.
Furthermore, the battery sealing gasket is arranged at the anode end of the battery and is made of high-temperature-resistant elastic insulating materials.
Furthermore, a metal supporting structure is arranged on the periphery of the battery, and the cathode end of the metal supporting structure is sealed with the connecting plate and the runner plate in sequence by laser welding to form a fuel air cavity; wherein the content of the first and second substances,
the size of the flow channel on the flow channel plate is matched with the volume of the air cavity and the fuel air cavity of the electrolytic cell stack, so that the fuel air flow and the air flow on two sides of the cell are equal.
Further, the matrix concave-convex structure on the runner plate is made of high-temperature-resistant rigid materials, the matrix concave-convex structure is enabled to play a role of reinforcing ribs by the size of the matrix concave-convex structure, and the battery pack unit where the matrix concave-convex structure is located is enabled to have compression resistance and flatness.
Further, inside the repeating unit, the air side convex points of the matrix type concave-convex structure on the flow channel plate of each battery pack unit are uniformly contacted and connected with the battery anode end of the next battery pack unit, so that the repeating unit has electrical continuity; and the number of the first and second electrodes,
the end surface of the anode pole plate facing the repeating unit is provided with a salient point with the same shape and size as the runner plate and is used for being in uniform contact connection with the battery anode end of the first-stage battery unit.
Further, an air passage formed between the rear end plate and the rear end plate gasket is of a structure that divides air entering the electrolytic cell stack into two.
Furthermore, the nut gasket and the screw gasket are high-temperature gaskets; and the number of the first and second electrodes,
gold-plated layers are coated on the surfaces of the anode plate and the cathode plate, and the thickness of each gold-plated layer is 10-20 mu m and is used for improving the conductivity of the plates.
Further, a fuel gas inlet and a fuel gas outlet and an air inlet and a fuel gas outlet on the rear end plate are both of tubular structures capable of being provided with three-way ferrule joints, and are provided with temperature and pressure monitoring units;
the anode plate and the cathode plate are both provided with plate-shaped tabs for mounting voltage outgoing lines.
Compared with the prior art, the invention can realize at least one of the following beneficial effects:
1. and a mature welding technology is adopted, so that the cell stack is easy to seal, and the service time and the heat preservation performance of the cell stack are effectively ensured.
2. Has good mechanical property and better thermal shock resistance.
3. The excellent heat conduction performance enables the electric pile to have high start-stop speed.
4. A more compact volume is used with lower manufacturing costs.
5. And a lightweight design structure is adopted, so that the power density of the galvanic pile is improved.
6. Compared with the galvanic pile adopting a glass sealing structure, the galvanic pile has better thermal shock resistance due to the repeated overlapping structure design of the high-temperature resistant elastic sealing gasket and the metal support battery pack unit.
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the disclosure, nor is it intended to be used to limit the scope of the disclosure.
Drawings
The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.
FIG. 1 shows a schematic diagram of the cell stack composition of the planar solid oxide electrolytic cell of example 1;
FIG. 2 is a schematic diagram showing the composition of a planar solid oxide electrolytic cell stack according to example 2;
fig. 3 shows a schematic view of the battery cell structure of example 2;
FIG. 4 is a schematic view showing the outer side structure of the cell stack of example 2 (front end plate side);
fig. 5 shows a second external structural view (rear end plate side) of the cell stack of example 2.
Reference numerals:
1-cap type nuts; 2-nut washer; 3-front end plate; 4-front end plate gasket; 5-anode plate; 6-a battery gasket; 7-a battery; 8-connecting plates; 9-a runner plate; 10-multiple sets of repeat units; 11-a plate gasket; 12-a cathode plate; 13-rear endplate gasket; 14-a rear end plate; 15-screw washer; 16-T type screw.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The term "including" and variations thereof as used herein is intended to be open-ended, i.e., "including but not limited to". Unless specifically stated otherwise, the term "or" means "and/or". The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like may refer to different or the same objects. Other explicit and implicit definitions are also possible below.
Example 1
One embodiment of the invention discloses a flat-plate solid oxide electrolytic cell stack, as shown in fig. 1, comprising a front end plate 3, an anode plate 5, a repeating unit 10, a cathode plate 12 and a rear end plate 14 which are connected in sequence. The connection relationship is various, and may be bolt fixing connection, or adhesive connection, or clamping connection, which may not be limited herein.
The anode plate 5 and the cathode plate 12 are used for connecting with the anode and the cathode of an external power supply, and are key components for supplying power for the operation of the electrolytic cell pile.
The front end plate 3 and the rear end plate 14 are used for protecting other components (such as the anode plate 5 and the cathode plate 12) in the integral structure of the electrolytic cell pile and uniformly distributing pretightening force on the other components.
The repeating unit 10 includes a plurality of stacked battery units, each of which is provided with a battery gasket 6, a battery 7, a connecting plate 8, and a flow channel plate 9, which are connected in sequence. The composition of the first group of battery cells is given in fig. 1, with subsequent battery cells within the repeating cells being omitted, and only the repeating cells being identified for ease of understanding.
Connecting plate 8 adopts hollow outline structure, is equipped with matrix concave-convex structure's runner on the runner board 9, and connecting plate 8, runner board 9 loop through laser welding and seal up in one side of battery 7 and make the inside fuel air cavity that forms of this group battery unit to let in vapor and hydrogen gas mixture, as the fuel gas.
The battery gasket 6 is sealed at the other side of the battery 7 and covers the edge of the battery 7, so that an air cavity is formed outside the battery pack unit for introducing air.
The battery gasket 6 is made of a material having good high-temperature sealability and insulation properties, and simultaneously plays a role in balancing the stack sheet structure in the process of stacking a plurality of groups of repeating units.
The rear end plate 14 is provided with a fuel gas inlet/outlet (fuel gas inlet/outlet) communicating with the fuel gas chamber, and an air inlet/outlet (air inlet/outlet) communicating with the air chamber.
In practice, the front end plate 3 and the rear end plate 14 together serve as an end plate of the cell stack, and the anode plate 5 and the cathode plate 12 together serve as a plate of the cell stack, so that the cell stack includes only the end plate, the plate, and the repeating unit. The repeating unit consists of a battery gasket 6, a battery 7, a connecting plate 8 and a runner plate 9.
When the electric pile operates, high-temperature steam in the fuel gas cavity generates electrochemical reaction to generate hydrogen when passing through the cell 7. High-temperature fuel gas (mixed gas of water vapor and hydrogen) enters the electric pile from a fuel gas inlet on the rear end plate, enters each fuel gas cavity of the electrolytic cell electric pile through a fuel gas channel formed by stacking the repeated units to react on the cell 7, and is discharged out of the electrolytic cell electric pile through the fuel gas channel and a fuel gas outlet of the rear end plate in sequence after the reaction. High-temperature air enters the electric pile from an air inlet on the rear end plate, enters each air cavity of the electrolytic cell electric pile through an air channel formed by stacking the repeating units, and the oxygen-enriched air after reaction is discharged out of the electrolytic cell electric pile through the air channel and an air outlet on the rear end plate.
Compared with the prior art, the solid oxide electrolytic cell galvanic pile provided by the embodiment is subjected to different structural designs, the repeating units are integrated, the anode plate 5 and the cathode plate 12 are respectively arranged at two ends of the repeating units, the integration level is higher, the high-temperature sealing performance is better, and the gas distribution uniformity is also better. Because the battery sealing gaskets 6 are arranged between the battery pack units, the shock resistance is better.
Example 2
The improvement is carried out on the basis of the embodiment 1, and in order to meet the requirements that each battery 7 is uniformly pressed and the whole battery 7 has good electric contact performance, the design of balanced thickness is adopted for the battery sealing gasket 6, the flow channel plate 9 and the connecting plate 8 in the repeating unit.
Preferably, the cell stack further comprises a pressing member for press-sealing the cell stack.
The pressurizing component is further composed of a cap nut 1, a nut gasket 2 (also called nut gasket), a T-shaped screw 16 and a screw gasket 15 (also called screw gasket), and as shown in fig. 2, other components can be added according to actual requirements. The T-shaped screw 16 is combined with the rear end plate 14 through a screw gasket 15, and the body of the T-shaped screw is arranged in an air cavity channel (also called as an air channel) of the electrolytic cell stack, penetrates out of the front end plate 3, and then is pressed and fixed through the nut gasket 2 and the cap nut 1 in sequence. The simplified internal structure reduces the volume of the galvanic pile and improves the power density of the galvanic pile.
Preferably, the nut gasket 2 and the screw gasket 15 are both high-temperature gaskets to ensure the tightness of the air cavity.
Preferably, the cell stack further comprises a front end plate gasket 4, a rear end plate gasket 13. The front end plate sealing gasket 4 is arranged between the front end plate 3 and the anode plate 5, is used for realizing the electrical isolation of the front end plate 3 and the anode plate 5, and is prepared from a high-temperature-resistant insulating material. The rear end plate sealing gasket 13 is arranged between the rear end plate 14 and the cathode plate 12 and used for realizing the electrical isolation of the rear end plate 14 and the cathode plate 12, and a fuel gas channel leading to an air channel and a fuel gas cavity of the air cavity of the electrolytic cell stack is formed between the rear end plate 14 and the rear end plate sealing gasket 13, is also prepared by adopting a high-temperature-resistant insulating material and has a structure capable of forming the fuel gas channel.
Preferably, the cell gasket 6 is provided at the anode end (upper side in fig. 3) of the cell 7 and is made of a high temperature resistant elastic insulating material, such as a 0.5mm gasket, having a resistance value of 0.5M Ω, and having a gasket compression ratio of 27% and a spring back ratio of 29% when tested at a surface pressure of 1MPa for a high temperature of 700 ℃ for 4 hours. The high-temperature-resistant elastic insulating material has good high-temperature sealing property and insulating property, and can play a role in balancing the pile layer sheet structure in the stacking process of multiple groups of repeating units.
Preferably, the outer periphery of the cell 7 has a metal support structure (see, for example, the metal sealing structure in CN201110003823.6, also called a metal support), and the cathode end of the cell is sealed with the connecting plate 8 and the runner plate 9 in sequence by laser welding to form a fuel gas chamber. Compared with the batteries with the electrolyte supporting structure and the anode supporting structure, the batteries with the metal supporting structure are not limited by the ceramic supporting body material, and the metal supporting body has excellent heat conduction performance, so that the electric pile has higher start-stop speed.
Preferably, the size of the flow channel on the flow channel plate 9 is matched with the volume of the air cavity and the fuel air cavity of the electrolytic cell stack, so that the fuel air flow and the air flow on two sides of the cell 7 are equal, the concave-convex points of the flow channel plate are designed to be arranged in a net-shaped high-density delta shape, and are matched with each other to form a plurality of strips with the cross section of about 0.5mm 2 The special flow channel ensures the fluid uniformity of fuel gas and air at two sides of the battery 7, and improves the utilization rate of the fuel gas.
Preferably, the matrix-type concave-convex structure on the runner plate 9 is made of a high-temperature-resistant rigid material, and the size of the matrix-type concave-convex structure enables the matrix-type concave-convex structure to function as a reinforcing rib (that is, the length, the thickness and the width meet a set relationship), and enables the battery pack unit where the matrix-type concave-convex structure is located to have a set compression resistance and a set flatness (all the convex points are located on the same horizontal plane).
Laser welding provides excellent electrical conductivity between the metal plates of the battery cells.
Preferably, inside the repeating unit, the air-side protrusions of the matrix-type concavo-convex structure of the flow channel plate 9 of each battery cell are uniformly connected in contact with the anode terminals of the cells 7 of the next battery cell, so that the repeating unit has electrical continuity.
In order to satisfy the uniform compression of each battery 7 and ensure good electrical contact performance of the whole battery, the design of uniform thickness is adopted for the battery sealing gasket 6, the flow channel plate 9 and the connecting plate 8 in the repeating unit, as shown in fig. 3.
Preferably, a plate gasket 11 is further provided between the last group of battery cells (the battery cells closest to the cathode substrate 12) and the cathode substrate 12. It adopts a hollow frame structure, as shown in fig. 2.
Preferably, gold plating layers are coated on the surfaces of the anode plate 5 and the cathode plate 12, and the thickness of the gold plating layers is 10-20 μm, so as to improve the conductivity of the plates.
Preferably, the same salient points as the flow channel plate 9 are processed on the rear end surface of the anode plate 5 to be uniformly contacted and connected with the anode end of the battery 7, and meanwhile, the uniformity of fluid in the air cavity of the first-stage battery unit is ensured.
Preferably, the air passage formed between the rear end plate 14 and the rear end plate gasket 13 is of a structure that divides the air entering the cell stack into two, i.e., has one input end and two output ends. A T-shaped screw penetrates through an air channel formed by the repeated unit stack to provide pressing force for the cell stack.
Preferably, the fuel gas inlet and outlet and the air inlet and outlet on the rear end plate 14 are both tubular structures capable of being provided with three-way ferrule joints, and are provided with temperature and pressure monitoring units (including temperature sensors and pressure sensors). A fuel gas channel is formed between the fuel gas inlet and outlet on the rear end plate 14 and the repeating unit.
Preferably, the anode plate 5 and the cathode plate 12 each have a plate-shaped tab for easy installation of the voltage outlet. Abundant interface function can help the performance of real-time supervision galvanic pile, adjusts the power of galvanic pile, exerts the maximum performance of galvanic pile. The external shape of the entire cell stack is shown in figure 4~5.
When the fuel cell is in operation, high-temperature fuel gas (mixed gas of water vapor and hydrogen) enters the fuel cell stack from a fuel gas inlet on the rear end plate 14, enters a fuel gas cavity of the cell 7 through a fuel gas channel formed by stacking the repeating units to react on the cell 7, and is discharged out of the fuel cell stack through the fuel gas channel and a fuel gas outlet of the rear end plate after the reaction. High-temperature air enters the electric pile from an air inlet on the rear end plate 14, enters the air cavity of the battery 7 through an air channel formed between the rear end plate 14 and the rear end plate sealing gasket 13 and an air channel formed by stacking the repeating units, and oxygen-enriched air after reaction is discharged out of the electric pile through the air channel and an air outlet of the rear end plate 14.
Compared with the prior art, the solid oxide electrolytic cell system provided by the embodiment has the following beneficial effects:
1. and a mature welding technology is adopted, so that the cell stack is easy to seal, and the service time and the heat preservation performance of the cell stack are effectively ensured.
2. Has good mechanical property and better thermal shock resistance.
3. The excellent heat conduction performance enables the electric pile to have high start-stop speed.
4. A more compact volume is used with lower manufacturing costs.
5. And a lightweight design structure is adopted, so that the power density of the galvanic pile is improved.
6. Compared with the galvanic pile adopting a glass sealing structure, the galvanic pile has better thermal shock resistance due to the structural design of repeated superposition of the high-temperature resistant elastic sealing gasket (the battery sealing gasket 6) and the battery pack unit of the metal supporting body.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles of the embodiments, the practical application, or improvements made to the prior art, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. A flat-plate solid oxide electrolytic cell pile is characterized by comprising a front end plate (3), an anode plate (5), a repeating unit (10), a cathode plate (12) and a rear end plate (14) which are connected in sequence; wherein the content of the first and second substances,
the repeating unit (10) comprises a plurality of groups of stacked battery pack units, and each battery pack unit is provided with a battery sealing gasket (6), a battery (7), a connecting plate (8) and a runner plate (9) which are connected in sequence; the connecting plate (8) adopts a hollow outer frame structure, the runner plate (9) is provided with runners with a matrix concave-convex structure, and the connecting plate (8) and the runner plate (9) are welded and sealed on one side of the battery (7) in sequence to form a fuel air cavity inside the battery pack unit; the battery sealing gasket (6) is sealed at the other side of the battery (7) and covers the edge of the battery (7) so that an air cavity is formed outside the battery pack unit;
the rear end plate (14) is provided with a fuel gas inlet and outlet communicated with the fuel gas cavity and an air inlet and outlet communicated with the air cavity.
2. The planar solid oxide cell stack of claim 1, further comprising a pressurizing member for pressure sealing the cell stack; wherein the content of the first and second substances,
the pressurizing component further comprises a cover-shaped nut (1), a nut gasket (2), a T-shaped screw (16) and a screw gasket (15); the T-shaped screw (16) is combined with the rear end plate (14) through a screw gasket (15), the rod body of the T-shaped screw is arranged in an air cavity channel of the electrolytic cell stack, penetrates out of the front end plate (3) and then is pressed and fixed through the nut gasket (2) and the cover-shaped nut (1) in sequence.
3. The planar solid oxide electrolysis cell stack according to claim 1 or 2, further comprising a front end plate gasket (4), a rear end plate gasket (13); wherein the content of the first and second substances,
the front end plate sealing gasket (4) is arranged between the front end plate (3) and the anode plate (5) and is used for realizing the electrical isolation of the front end plate (3) and the anode plate (5);
the rear end plate sealing gasket (13) is arranged between the rear end plate (14) and the cathode plate (12) and used for realizing the electrical isolation of the rear end plate (14) and the cathode plate (12), and an air channel leading to each air cavity of the electrolytic cell pile and a fuel gas channel of each fuel air cavity are formed between the rear end plate (14) and the rear end plate sealing gasket (13).
4. The planar solid oxide electrolysis cell stack according to claim 3, wherein the cell gasket (6) is disposed at the anode end of the cell (7) and is made of a high temperature resistant elastic insulating material.
5. The flat plate solid oxide electrolysis cell stack according to claim 4, characterized in that the periphery of the cell (7) is provided with a metal support structure, and the cathode end of the metal support structure is sealed with the connecting plate (8) and the runner plate (9) in turn by laser welding to form a fuel gas cavity; wherein, the first and the second end of the pipe are connected with each other,
the size of the flow channel on the flow channel plate (9) is matched with the volume of the air cavity and the fuel air cavity of the electrolytic cell stack, so that the fuel air flow and the air flow on two sides of the cell (7) are equal.
6. The planar solid oxide electrolytic cell stack according to claim 5, wherein the matrix-like relief structure on the flow channel plate (9) is made of a high temperature resistant rigid material, and has a size such that the matrix-like relief structure functions as a reinforcing rib and the battery unit thereof has a compressive resistance and a flatness.
7. The flat solid oxide cell stack according to claim 6, wherein inside the repeating unit, the air side convex points of the matrix type concavo-convex structure on the flow channel plate (9) of each cell unit are uniformly connected in contact with the anode terminals of the cells (7) of the next cell unit to provide electrical continuity to the repeating unit; and also,
the end surface of the anode plate (5) facing the repeating unit is provided with a salient point with the same shape and size as the flow channel plate (9) and is used for being in uniform contact connection with the anode end of the battery (7) of the first-stage battery pack unit.
8. The flat solid oxide electrolysis cell stack according to any one of claims 4 to 7, wherein the air passage formed between the rear end plate (14) and the rear end plate gasket (13) is of a structure that divides the air entering the cell stack into two.
9. The flat plate solid oxide electrolytic cell stack according to claim 2, characterized in that the nut gasket (2) and the screw gasket (15) are high temperature gaskets; and the number of the first and second electrodes,
the surfaces of the anode plate (5) and the cathode plate (12) are coated with gold plating layers, and the thickness of the gold plating layers is 10-20 mu m and is used for improving the conductivity of the plates.
10. The flat-plate solid oxide electrolytic cell stack according to any one of claims 1, 2, 4, 5, 6, 7 and 9, wherein the fuel gas inlet and outlet and the air inlet and outlet on the rear end plate (14) are both of tubular structures capable of being provided with three-way snap-fit connectors, and temperature and pressure monitoring units are respectively arranged at the inlet and the outlet; and the number of the first and second electrodes,
the anode plate (5) and the cathode plate (12) are both provided with plate-shaped tabs for mounting voltage outgoing lines.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211620979.3A CN115613063B (en) | 2022-12-16 | 2022-12-16 | Plate type solid oxide electrolysis Chi Diandui |
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| CN202211620979.3A CN115613063B (en) | 2022-12-16 | 2022-12-16 | Plate type solid oxide electrolysis Chi Diandui |
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| CN115613063B CN115613063B (en) | 2023-05-05 |
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