CN115613063B

CN115613063B - Plate type solid oxide electrolysis Chi Diandui

Info

Publication number: CN115613063B
Application number: CN202211620979.3A
Authority: CN
Inventors: 孙长建; 刘亚迪; 胡浩然
Original assignee: Beijing Siweite New Energy Technology Co ltd
Current assignee: Beijing Siweite New Energy Technology Co ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-05-05
Anticipated expiration: 2042-12-16
Also published as: CN115613063A

Abstract

The invention provides a flat plate type solid oxide electrolysis Chi Diandui, 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 shock resistance of a galvanic pile in the prior art. The galvanic 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. The repeated 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, a runner plate is provided with a runner with a matrix concave-convex structure, and the connecting plate and the runner plate are sequentially sealed on one side of the battery through laser welding so that a fuel air cavity is formed inside the battery unit; the battery gasket seals the other side of the battery and covers the battery edge so that an air cavity is formed outside the battery unit. The rear end plate is provided with a fuel gas inlet and a fuel gas outlet and an air inlet and outlet.

Description

Plate type solid oxide electrolysis Chi Diandui

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 pile.

Background

The hydrogen energy and fuel cell technology is an important innovative technology for promoting the economic society to realize low-carbon and environment-friendly development, and is a strategic choice for coping with global climate change, guaranteeing national energy supply safety and realizing sustainable development in China.

A Solid Oxide Electrolytic Cell (SOEC) electrolyzes water to produce hydrogen without any accompanying pollution and greenhouse gas emissions. The SOEC stack operates at a high temperature (600-800 ℃) and has the advantage of dynamics that the SOEC stack can use low-cost nickel electrodes and has various structural designs, and at present, a pipe type and a flat plate type are mainly adopted. Compared with the tubular structure, the flat plate structure has the advantages of simple preparation process, low manufacturing cost, shorter current collection flow, higher power density and more superiority.

At present, the existing flat plate SOEC pile has a series of problems of poor pile integration level, poor high-temperature sealing performance, poor distribution uniformity, poor shock resistance and the like in the application process.

Disclosure of Invention

In view of the above analysis, the embodiment of the invention aims to provide a flat plate type solid oxide electrolysis Chi Diandui for solving the problems of poor integration level, poor high-temperature sealing performance, poor gas distribution uniformity and poor shock resistance of a galvanic pile in the prior art.

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 connected in sequence; wherein, the liquid crystal display device comprises a liquid crystal display device,

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, a runner plate is provided with a runner with a matrix concave-convex structure, and the connecting plate and the runner plate are sequentially welded and sealed on one side of the battery so that a fuel air cavity is formed inside the battery unit; the battery sealing gasket is sealed on 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 a fuel gas outlet which are communicated with the fuel gas cavity and an air inlet and an air outlet which are communicated with the air cavity.

The beneficial effects of the technical scheme are as follows: the solid oxide electrolytic cell pile is subjected to different structural designs, the repeated units are integrated, the anode plate and the cathode plate are respectively arranged at two ends of the repeated units, the integration level is higher, the high-temperature sealing performance is better, and the gas distribution uniformity is also better. The battery gasket is arranged between the battery pack units, so that the shock resistance is good.

Based on a further improvement of the device, the electrolytic cell pile further comprises a pressurizing component for pressurizing and sealing the electrolytic cell pile; wherein, the liquid crystal display device comprises a liquid crystal display device,

the pressurizing component further comprises a cover nut, a nut gasket, a T-shaped screw and a screw gasket; the T-shaped screw rod is combined with the rear end plate through a screw rod gasket, and the rod body of the T-shaped screw rod is arranged in an air cavity channel of the electrolytic cell pile, penetrates out of the front end plate and is then pressurized and fixed through a nut gasket and a cover nut in sequence.

Further, the electrolytic cell stack also comprises a front end plate sealing gasket and a rear end plate sealing gasket; wherein, the liquid crystal display device comprises a liquid crystal display device,

the front end plate sealing gasket is arranged between the front end plate and the anode plate and is used for realizing electric 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 polar plate and is used for realizing electric isolation of the back end plate and the cathode polar plate, and an air channel leading to an air cavity and a fuel gas channel of a fuel gas cavity of the electrolytic cell stack are formed between the back end plate and the back end plate sealing gasket.

Further, the battery sealing gasket is arranged at the anode end of the battery and is prepared from a high-temperature-resistant elastic insulating material.

Further, a metal supporting structure is arranged on the periphery of the battery, and the cathode end of the battery is sealed with the connecting plate and the runner plate by laser welding in sequence to form a fuel air cavity; wherein, the liquid crystal display device comprises a liquid crystal display device,

the size of the runner on the runner plate is matched with the volumes of the air cavity and the fuel air cavity of the electrolytic cell pile so as to make the fuel air flow and the air flow at the two sides of the cell equal.

Furthermore, the matrix concave-convex structure on the runner plate adopts a high-temperature resistant rigid material, and the size of the matrix concave-convex structure enables the matrix concave-convex structure to play a role of reinforcing ribs and enables the battery unit where the matrix concave-convex structure is located to have compression resistance and flatness.

Further, inside the repeating unit, the air side salient points of the matrix concave-convex structure on the runner plate of each battery unit are uniformly contacted and connected with the battery anode end of the next battery unit, so that the repeating unit has electric continuity; and, in addition, the processing unit,

the end face of the anode plate, which faces the repeating unit, is provided with salient points with the same shape and size as the runner plate, and the salient points are used for uniformly contacting and connecting with the anode ends of the batteries of the first-stage battery pack unit.

Further, an air passage formed between the rear end plate and the rear end plate gasket adopts a structure in which air entering the cell stack is divided into two.

Further, the nut gasket and the screw gasket are both high-temperature sealing gaskets; and, in addition, the processing unit,

the surfaces of the anode plate and the cathode plate are coated with gold plating layers, the thickness of the gold plating layers is 10-20 mu m, and the gold plating layers are used for improving the conductivity of the plates.

Further, a fuel gas inlet and a fuel gas outlet and an air inlet on the rear end plate are all in tubular structures capable of being provided with three-way clamping sleeve connectors, and are provided with temperature and pressure monitoring units;

the anode plate and the cathode plate are provided with plate-shaped lugs for installing voltage outgoing lines.

Compared with the prior art, the invention has at least one of the following beneficial effects:

1. and due to the adoption of a mature welding technology, 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 properties and better thermal shock resistance of the galvanic pile.

3. Excellent heat conduction performance, so that the galvanic pile has high start-stop speed.

4. With a more compact volume, lower manufacturing costs are achieved.

5. And the power density of the electric pile is improved by adopting a lightweight design structure.

6. Compared with a pile adopting a glass sealing structure, the pile has better thermal shock resistance by the structural design that the high-temperature resistant elastic sealing gasket and the metal support body battery pack unit are repeatedly overlapped.

The 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 is a schematic view showing the constitution of a flat plate type solid oxide electrolytic cell stack of example 1;

FIG. 2 is a schematic view showing the composition of a flat plate type solid oxide electrolytic cell stack of example 2;

fig. 3 shows a schematic view of the battery cell structure of embodiment 2;

FIG. 4 is a schematic view showing the outer side structure of the electrolytic cell stack of example 2 (front end plate side);

fig. 5 shows a schematic view of the outside structure of the electrolytic cell stack of example 2 (rear end plate side).

Reference numerals:

1-a cap nut; 2-nut washers; 3-a front end plate; 4-front end plate gasket; 5-anode plate; 6-battery gasket; 7-cell; 8-connecting plates; 9-runner plates; 10-sets of repeating units; 11-an electrode plate sealing gasket; 12-cathode plate; 13-a rear end plate gasket; 14-a rear end plate; 15-a screw gasket; 16-T 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 illustrated in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to 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 "comprising" and variations thereof as used herein means open ended, i.e., "including but not limited to. The term "or" means "and/or" unless specifically stated otherwise. 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 object. Other explicit and implicit definitions are also possible below.

Example 1

In one embodiment of the present invention, a flat plate type solid oxide electrolytic cell stack is disclosed, 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 sequentially connected. The connection relationship is various, and may be a bolt fixed connection, an adhesive connection, or a clamping connection, which is not limited herein.

The anode plate 5 and the cathode plate 12 are used for being connected with the positive electrode and the negative electrode 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 overall structure of the electrolytic cell stack and uniformly distributing the pretightening force on the other components.

The repeating unit 10 includes a plurality of groups of stacked battery cells, each of which is provided with a battery gasket 6, a battery 7, a connection plate 8, and a flow path plate 9, which are connected in sequence. The composition of the first set of battery cells is given in fig. 1, and subsequent battery cells within the repeat unit are omitted, with only the repeat units identified for ease of understanding.

The connecting plate 8 adopts a hollow outer frame structure, the runner plate 9 is provided with a runner with a matrix concave-convex structure, and the connecting plate 8 and the runner plate 9 are sequentially sealed on one side of the battery 7 through laser welding so that a fuel air cavity is formed in the battery unit, and the fuel air cavity is filled with water vapor and hydrogen gas mixture to be used as 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 chamber is formed outside the battery unit to allow air to pass through.

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 layer 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 and outlet (fuel gas inlet and outlet) communicating with the fuel gas chamber and an air inlet and outlet (air inlet and outlet) communicating with the air chamber.

In practice, the front end plate 3 and the rear end plate 14 together act as end plates of the cell stack, and the anode plate 5 and the cathode plate 12 together act as plates of the cell stack, such that the cell stack comprises only end plates, plates and repeating units. The repeating unit is composed of a battery sealing gasket 6, a battery 7, a connecting plate 8 and a runner plate 9.

When the electric pile is operated, electrochemical reaction occurs when high-temperature water vapor in the fuel air cavity passes through the battery 7 to generate hydrogen. The high-temperature fuel gas (mixed gas of water vapor and hydrogen) enters the cell stack through a fuel gas inlet on the rear end plate, and enters each fuel gas cavity of the cell stack through a fuel gas channel formed by stacking the repeated units to react on the cell 7, and is discharged out of the 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 cell stack through an air inlet on the rear end plate, enters each air cavity of the cell stack through an air channel formed by stacking the repeating units, and the reacted oxygen-enriched air is discharged out of the cell stack through the air channel and an air outlet on the rear end plate.

Compared with the prior art, the solid oxide electrolytic cell pile provided by the embodiment has different structural designs, integrates the repeated units, and respectively places the anode plate 5 and the cathode plate 12 at two ends of the repeated units, so that the integration level is higher, the high-temperature sealing performance is better, and the gas distribution uniformity is also better. The battery gasket 6 is arranged between the battery pack units, so that the shock resistance is better.

Example 2

The improvement based on the embodiment 1 is that in order to satisfy the uniform compression of each cell 7 and ensure good electrical contact performance of the whole cell 7, a design of uniform thickness is adopted for the cell gasket 6, the flow passage plate 9 and the connection plate 8 in the repeating unit.

Preferably, the cell stack further comprises a pressurizing member for pressurizing and sealing the cell stack.

The pressurizing component further comprises a cap nut 1, a nut gasket 2 (also called a nut gasket), a T-shaped screw 16 and a screw gasket 15 (also called a screw gasket), 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 a rod body of the T-shaped screw is arranged in an air cavity channel (also called an air channel) of the electrolytic cell pile, penetrates out from the front end plate 3 and is then pressurized and fixed through the nut gasket 2 and the cover nut 1 in sequence. The simplified internal structure reduces the volume of the electric pile and improves the power density of the electric pile.

Preferably, both the nut gasket 2 and the screw gasket 15 use high temperature gaskets to ensure the tightness of the air chamber.

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 and is used for realizing electric 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 polar plate 12, is used for realizing electric isolation of the rear end plate 14 and the cathode polar plate 12, forms an air channel leading to an air cavity of the electrolytic cell stack and a fuel gas channel of a fuel air cavity 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 battery gasket 6 is provided at the anode end (upper side in fig. 3) of the battery 7, and is made of a high temperature resistant elastic insulating material, for example, a 0.5mm gasket, having a resistance value of 0.5mΩ, and a gasket compression ratio of 27% and a rebound ratio of 29% under a 1MPa surface pressure by 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 sheet structure of the electric pile in the stacking process of a plurality of 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 the prior patent CN201110003823.6, also called a metal support body), and the cathode end of the cell is sealed with the connecting plate 8 and the flow channel plate 9 by laser welding in order to form a fuel gas cavity. Compared with the cells of the electrolyte supporting structure and the anode supporting structure, the cells of the metal supporting structure are not limited by the materials of the ceramic supporting body, and the metal supporting body has excellent heat conduction performance, so that the galvanic pile has higher start-stop speed.

Preferably, the runner size on the runner plate 9 is matched with the volumes of the air cavity and the fuel air cavity of the electrolytic cell stack so as to make the fuel air flow and the air flow at two sides of the cell 7 equal, and the concave-convex points of the runner plate are designed into a net shapeThe high density article is arranged in a shape like Chinese character 'pin', and mutually matched to form a plurality of articles with a cross section of about 0.5mm ² The special flow channel design ensures the fluid uniformity of fuel gas and air at two sides of the battery 7, and improves the utilization rate of fuel gas.

Preferably, the matrix concave-convex structure on the runner plate 9 is made of a high-temperature resistant rigid material, and the size of the matrix concave-convex structure is such that the matrix concave-convex structure plays a role of a reinforcing rib (i.e. the length, the thickness and the width meet a set relation), and the battery unit where the matrix concave-convex structure is located has set compression resistance and flatness (all the convex points are on the same horizontal plane).

Laser welding provides excellent electrical conductivity between the metal plates of the battery cells.

Preferably, the air side bumps of the matrix concave-convex structure on the flow channel plate 9 of each battery unit are uniformly contacted and connected with the anode end of the battery 7 of the next battery unit inside the repeating unit, so that the repeating unit has electrical continuity.

In order to meet the requirement that each cell 7 is uniformly pressed and to ensure good electrical contact performance of the whole cell, a design of uniform thickness is adopted for the cell gasket 6, the flow passage plate 9 and the connecting plate 8 in the repeating unit, as shown in fig. 3.

Preferably, a plate gasket 11 is also provided between the last group of battery cells (the battery cell closest to the cathode substrate 12) and the cathode substrate 12. Which 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 mu m for improving the conductivity of the plates.

Preferably, the same salient points as the runner plate 9 are machined on the rear end face of the anode plate 5 and are 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 pack unit is ensured.

Preferably, the air passage formed between the rear end plate 14 and the rear end plate gasket 13 is constructed in a structure of dividing the air entering the cell stack into two, i.e., having one input end and two output ends. The air channel formed by the repeated unit stack is penetrated by a T-shaped screw rod to provide compaction force for the electric pile.

Preferably, the fuel gas inlet and outlet and the air inlet and outlet on the rear end plate 14 are all in tubular structures capable of being provided with three-way clamping sleeve connectors, and are provided with temperature and pressure monitoring units (comprising temperature sensors and pressure sensors). A fuel gas passage 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 are provided with plate-shaped lugs for facilitating the installation of a voltage outgoing line. The abundant interface functions can help to monitor the performance of the electric pile in real time, adjust the power of the electric pile and exert the maximum performance of the electric pile. The external shape of the whole electrolytic cell stack is shown in fig. 4-5.

In practice, high-temperature fuel gas (mixed gas of water vapor and hydrogen) enters the electric pile through a fuel gas inlet on the rear end plate 14, a fuel gas channel formed by stacking the repeated units enters the fuel gas cavity of the battery 7 to react on the battery 7, and the reacted fuel gas is discharged out of the electric pile through the fuel gas channel and a fuel gas outlet of the rear end plate. The high temperature air enters the pile through the air inlet on the rear end plate 14, enters the air cavity of the battery 7 through the air channel formed between the rear end plate 14 and the rear end plate sealing gasket 13 and the air channel formed by stacking the repeated units, and the oxygen-enriched air after reaction is discharged out of the pile through the air channel and the 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:

4. With a more compact volume, lower manufacturing costs are achieved.

6. Compared with a pile adopting a glass sealing structure, the pile has better thermal shock resistance by the structural design that the high-temperature resistant elastic sealing gasket (the battery sealing gasket 6) and the battery pack unit of the metal support body are repeatedly overlapped.

The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of the prior art, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A flat plate type solid oxide electrolyte Chi Diandui, which 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, and a pressurizing component for pressurizing and sealing a galvanic pile; wherein, the liquid crystal display device comprises a liquid crystal display device,

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 a runner with a matrix concave-convex structure, concave-convex points of the runner plate are designed to be arranged in a net-shaped high-density delta shape, and a plurality of channels with the cross section of 0.5mm are formed ² The gas channel of the battery pack unit is formed by welding and sealing a connecting plate (8) and a runner plate (9) on one side of the battery (7) in sequence; the battery sealing gasket (6) is sealed on 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 a fuel gas outlet which are communicated with the fuel gas cavity and an air inlet and an air outlet which are communicated with the air cavity;

the air side salient points of the matrix concave-convex structure on the runner plate (9) of each battery unit are uniformly contacted and connected with the anode end of the battery (7) of the next battery unit in the repeating unit, so that the repeating unit has electric continuity; the end face of the anode plate (5) facing the repeating unit is provided with convex points with the same shape and size as the runner plate (9) and used for being uniformly contacted and connected with the anode end of the battery (7) of the first-stage battery pack unit;

the pressurizing component further comprises a cover type 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), and the rod body of the T-shaped screw is arranged in an air cavity channel of the electrolytic cell pile, penetrates out from the front end plate (3) and is then pressurized and fixed through the nut gasket (2) and the cover nut (1) in sequence.

2. The flat plate type solid oxide electrolyte Chi Diandui according to claim 1, further comprising a front end plate gasket (4) and a rear end plate gasket (13); wherein, the liquid crystal display device comprises a liquid crystal display device,

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 electric 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 polar plate (12) and is used for realizing electric isolation of the rear end plate (14) and the cathode polar plate (12), and an air channel leading to each air cavity and a fuel gas channel of each fuel gas cavity of the electrolytic cell stack are formed between the rear end plate (14) and the rear end plate sealing gasket (13).

3. The flat plate type solid oxide electrolysis Chi Diandui according to claim 2, wherein the battery sealing gasket (6) is arranged at the anode end of the battery (7) and is made of a high-temperature-resistant elastic insulating material.

4. A flat plate type solid oxide electrolysis Chi Diandui according to claim 3, wherein the periphery of the battery (7) is provided with a metal supporting structure, and the cathode end of the battery is sealed with the connecting plate (8) and the runner plate (9) by adopting laser welding in sequence to form a fuel air cavity; wherein, the liquid crystal display device comprises a liquid crystal display device,

the size of the runner on the runner plate (9) is matched with the volumes of the air cavity and the fuel air cavity of the electrolytic cell pile so as to make the fuel air flow and the air flow at the two sides of the cell (7) equal.

5. The flat plate type solid oxide electrolyte Chi Diandui according to claim 4, wherein the matrix concave-convex structure on the runner plate (9) is made of a high-temperature resistant rigid material, and the size of the matrix concave-convex structure is such that the matrix concave-convex structure plays a role of reinforcing ribs and the battery unit where the matrix concave-convex structure is located has compression resistance and flatness.

6. A plate type solid oxide electrolyte Chi Diandui according to any one of claims 2 to 5, wherein the air passage formed between the rear end plate (14) and the rear end plate gasket (13) is constructed so as to divide air entering the cell stack into two.

7. The flat plate type solid oxide electrolysis Chi Diandui according to claim 1, wherein the nut gasket (2) and the screw gasket (15) are both high-temperature sealing gaskets; and, in addition, the processing unit,

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, so that the conductivity of the plates is improved.

8. The flat plate type solid oxide electrolysis Chi Diandui according to any one of claims 1, 2, 3, 4, 5 and 7, wherein a fuel gas inlet and a fuel gas outlet and an air inlet on the rear end plate (14) are respectively in a tubular structure capable of being provided with a three-way clamping sleeve connector, and a temperature and pressure monitoring unit is respectively arranged at an inlet and an outlet; and, in addition, the processing unit,

the anode plate (5) and the cathode plate (12) are provided with plate-shaped lugs for installing voltage outgoing lines.