CN115882027A - Metal flat tube solid oxide fuel cell stack structure - Google Patents

Abstract

The present application discloses a metal flat tube solid oxide fuel cell stack structure, which includes a cell array composed of a plurality of metal flat tube solid oxide fuel cells, and the metal flat tube solid oxide fuel cell includes a metal support Body and the battery functional layer arranged on the upper and lower sides of the metal support, the metal flat tube solid oxide fuel single cells in the same layer are electrically connected through the side contact of the metal support to form a parallel structure The battery packs of different layers are electrically connected through connectors to form a series structure, and the connectors of adjacent layers are also separated by insulating members. The metal flat tube solid oxide fuel cell stack structure can simplify and compact the entire battery structure, improve the thermal shock resistance of the battery, improve power generation efficiency and operation stability, and can also reduce the manufacturing cost of the battery.

Description

A Metal Flat Tube Solid Oxide Fuel Cell Stack Structure

technical field

The invention belongs to the technical field of fuel cell manufacturing, in particular to a metal flat tube solid oxide fuel cell stack structure.

Background technique

A fuel cell is a device that directly converts the chemical energy of fuel gas into electrical energy. According to the different electrolytes of the battery, it can be divided into alkaline fuel cells, phosphate fuel cells, molten carbonate fuel cells, proton exchange membrane fuel cells and Solid Oxide Fuel Cell. Among them, solid oxide fuel cells have the following advantages: high unit energy density, high energy efficiency, all solid materials used, and adjustable power generation scale, and hydrocarbon gases such as natural gas, liquefied petroleum gas, and coal gas can be used as fuel gases. .

A current technical trend is that the operating temperature of solid oxide fuel cells is developing towards a low-to-medium temperature. Due to the reduction in battery operating temperature, porous metal can be used as a battery support, which will further reduce the manufacturing cost of the battery. At the same time Improving the stability of the battery has a positive effect. Generally speaking, battery systems are assembled from single cells. However, there is no precedent in the prior art for stacking metal flat tube solid oxide fuel cells.

Contents of the invention

In order to solve the above problems, the present invention provides a metal flat tube solid oxide fuel cell stack structure, which can simplify and compact the entire battery structure, improve the thermal shock resistance of the battery, improve power generation efficiency and operation stability, and also The manufacturing cost of the battery can be reduced.

A metal flat tube solid oxide fuel cell stack structure provided by the present invention includes a cell array composed of a plurality of metal flat tube solid oxide fuel cells, and the metal flat tube solid oxide fuel cell includes a metal support body and the battery functional layers arranged on the upper and lower sides of the metal support, and the metal flat tube solid oxide fuel single cells in the same layer are electrically connected through the side contact of the metal support to form a parallel structure The battery packs of different layers are electrically connected through connectors to form a series structure, and the connectors of adjacent layers are also separated by insulating components.

Preferably, in the above metal flat tube solid oxide fuel cell stack structure, the side of the metal support is further sealed with a sealing member.

Preferably, in the above metal flat tube solid oxide fuel cell stack structure, the insulating component is an insulating gasket.

Preferably, in the above metal flat tube solid oxide fuel cell stack structure, the insulating component is a ceramic or mica insulating component.

Preferably, in the above metal flat tube solid oxide fuel cell stack structure, the cross section of the metal support body is a parallelogram.

Preferably, in the above metal flat tube solid oxide fuel cell stack structure, the metal support is a ferritic stainless steel support or an iron-chromium alloy support.

Preferably, in the above metal flat tube solid oxide fuel cell stack structure, the battery functional layer includes an anode connected to the metal support, an electrolyte layer connected to the anode, and the electrolyte layer The other side is connected to the cathode.

Preferably, in the above metal flat tube solid oxide fuel cell stack structure, there is an air channel at the part where the connecting body contacts the cathode.

Preferably, in the above metal flat tube solid oxide fuel cell stack structure, the metal support has a fuel gas channel inside.

It can be seen from the above description that the metal flat tube solid oxide fuel cell stack structure provided by the present invention includes a cell array composed of a plurality of metal flat tube solid oxide fuel cells, and the metal flat tube solid oxide fuel cell The single cell includes a metal support and battery functional layers arranged on the upper and lower sides of the metal support, and the metal flat tube solid oxide fuel single cells in the same layer are contacted by the side of the metal support. Connected to form a battery pack in parallel structure, the battery packs of different layers are electrically connected through connectors to form a series structure, and the connectors of adjacent layers are also separated by insulating components, thus realizing the solid oxidation of metal flat tubes The stack of biofuel cells can simplify and compact the entire battery structure, improve the thermal shock resistance of the battery, improve the power generation efficiency and operation stability, and also reduce the manufacturing cost of the battery.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is a single cell schematic diagram of an embodiment of a metal flat tube solid oxide fuel cell stack structure provided by the present invention;

Fig. 2 is an overall schematic diagram of an embodiment of a metal flat tube solid oxide fuel cell stack structure provided by the present invention.

Detailed ways

The core of the present invention is to provide a metal flat tube solid oxide fuel cell stack structure, which can simplify and compact the entire battery structure, improve the thermal shock resistance of the battery, improve the power generation efficiency and the stability of operation, and can also reduce the battery life. manufacturing cost.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

An embodiment of a metal flat tube solid oxide fuel cell stack structure provided by the present invention is shown in Figure 1 and Figure 2, and Figure 1 is an implementation of a metal flat tube solid oxide fuel cell stack structure provided by the present invention Figure 2 is an overall schematic diagram of an embodiment of a metal flat tube solid oxide fuel cell stack structure provided by the present invention, the metal flat tube solid oxide fuel cell stack structure may include multiple A battery array composed of metal flat tube solid oxide fuel cells 1, the metal flat tube solid oxide fuel cells 1 include a metal support 11 and a battery function layer 12 arranged on the upper and lower sides of the metal support 11, in the same layer The metal flat tube solid oxide fuel single cells are electrically connected in contact through the side 111 of the metal support 11 to form a battery pack in parallel structure. The battery packs of different layers are electrically connected through the connector 2 to form a series structure. The connecting bodies 2 are also separated by insulating components 3 .

It should be noted that in the prior art, single-layer and separated batteries are used, but this embodiment realizes the stacking of batteries to form a stack, so the energy density is higher, and each The number of single cells in one layer is not limited, and it can match the length of the connecting body 2. The actual installation process is to contact and assemble the single cells 1 in order to fix them, and then install the connecting body 2. Between every two layers of connecting bodies 2 Insulating components 3 are installed between them to separate them, and finally, the single cells in a single layer are in a parallel structure, and the cells in different layers are in a series structure.

It can be seen from the above description that in the embodiment of the metal flat tube solid oxide fuel cell stack structure provided by the present invention, since it includes a cell array composed of a plurality of metal flat tube solid oxide fuel cells, the metal flat tube solid oxide fuel cell The material fuel single cell includes a metal support body and battery functional layers arranged on the upper and lower sides of the metal support body. The metal flat tube solid oxide fuel single cells in the same layer are electrically connected through the side contact of the metal support body to form a parallel connection. Structured battery packs, the battery packs of different layers are electrically connected through connectors to form a series structure, and the connectors of adjacent layers are also separated by insulating parts, thus realizing the stacking of metal flat tube solid oxide fuel cells, thereby The structure of the whole battery can be simplified and compacted, the thermal shock resistance of the battery can be improved, the power generation efficiency and the stability of operation can be improved, and the manufacturing cost of the battery can also be reduced.

In a specific embodiment of the above-mentioned metal flat tube solid oxide fuel cell stack structure, the side of the metal support 11 can also be sealed with a seal. This is because the metal support is used, so it needs to be sealed In order to achieve insulation from the surroundings, it can be directly sealed during manufacture, or can be sealed in a subsequent step. There is no limitation here, and ceramic glass sealant can be used for sealing, or laser welding or brazing can be used to achieve sealing.

In another specific embodiment of the above-mentioned metal flat tube solid oxide fuel cell stack structure, the insulating member 3 can preferably be an insulating gasket, and this insulating gasket can be provided with a sufficiently large thickness to achieve effective insulation, further , the insulating member 3 may preferably be a ceramic or mica insulating member, both of which can achieve high insulation and low cost, of course, other materials can also be selected for insulation according to actual needs, which is not limited here.

In yet another specific embodiment of the above-mentioned metal flat tube solid oxide fuel cell stack structure, the cross-section of the metal support 11 can preferably be a parallelogram, as shown in Figures 1 and 2, so that the upper and lower sides can be conveniently The working surface of the battery is set, and the left and right sides are convenient for electrical connection with the adjacent cells. Of course, other shapes can be selected according to actual needs, which is not limited here.

In a preferred embodiment of the above-mentioned metal flat tube solid oxide fuel cell stack structure, the metal support body 11 can be a ferritic stainless steel support body or an iron-chromium alloy support body, which not only can ensure a sufficiently high support strength, but also The cost is relatively low, and of course, support bodies of other materials can also be selected according to actual needs, which is not limited here.

In another preferred embodiment of the above metal flat tube solid oxide fuel cell stack structure, continue to refer to FIG. 1 , the battery functional layer 12 may include an anode 121 connected in contact with the metal support 11, and an electrolyte connected to the anode 121 layer 122, and a cathode 123 connected to the other side of the electrolyte layer 122. Further, continuing to refer to FIG. 2 , there is an air channel 4 at the part where the connecting body is in contact with the cathode, and the metal support 11 may have a fuel gas channel 5 inside.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A metal flat tube solid oxide fuel cell stack structure, characterized in that it comprises a battery array composed of a plurality of metal flat tube solid oxide fuel cells, and the metal flat tube solid oxide fuel cells include The metal support and the battery functional layers arranged on the upper and lower sides of the metal support, the metal flat tube solid oxide fuel single cells in the same layer are electrically connected through the side contact of the metal support, forming For battery packs in parallel structure, the battery packs of different layers are electrically connected through connectors to form a series structure, and the connectors of adjacent layers are also separated by insulating components. 2 . The metal flat tube solid oxide fuel cell stack structure according to claim 1 , characterized in that, the side of the metal support is also sealed with a sealing member. 3 . 3 . The metal flat tube solid oxide fuel cell stack structure according to claim 1 , wherein the insulating member is an insulating gasket. 4 . 4 . The metal flat tube solid oxide fuel cell stack structure according to claim 1 , wherein the insulating component is a ceramic or mica insulating component. 5 . The metal flat tube solid oxide fuel cell stack structure according to claim 1 , characterized in that the cross section of the metal support body is a parallelogram. 6 . The metal flat tube solid oxide fuel cell stack structure according to claim 1 , wherein the metal support is a ferritic stainless steel support or an iron-chromium alloy support. 7. The metal flat tube solid oxide fuel cell stack structure according to any one of claims 1-6, characterized in that, the battery functional layer includes an anode connected to the metal support, and an anode connected to the metal support. An electrolyte layer connected to the anode, and a cathode connected to the other side of the electrolyte layer. 8 . The metal flat-tube solid oxide fuel cell stack structure according to claim 7 , wherein an air channel is provided at a portion where the connecting body contacts the cathode. 9 . 9 . The metal flat tube solid oxide fuel cell stack structure according to claim 8 , wherein the metal support body has a fuel gas channel inside.

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