High-temperature fuel cell structure and series-parallel stack structure

Abstract

The utility model relates to the technical field of fuel cells, in particular to a high-temperature fuel cell structure and a series-parallel galvanic pile structure, which comprise an anode plate, a cathode plate, an anode plate, an anode plate, a cathode plate, an anode plate, an anode plate, a cathode plate, an anode plate, a cathode plate, an anode plate and a cathode plate, and are characterized in that the anode plate extends along a first direction and is provided with a fuel gas inlet and a fuel gas distribution area; the cathode plate extends along the first direction and is provided with a fuel gas outlet and a cathode gas collecting area which is arranged in the cathode plate and is communicated with the fuel gas outlet; the battery cell array is arranged between the anode plate and the cathode plate in the second direction through a supporting base body fixedly connected to the inner side of the anode plate and the inner side of the cathode plate and makes flexible contact with the supporting base body, the two ends of the battery cell array communicate with the fuel gas distribution area and the cathode gas collection area correspondingly, and the first direction is perpendicular to the second direction. According to the structure, rigid fixation and flexible contact are combined, so that the thermal deformation of the battery cell array is protected, the stacking work of a plurality of battery cells is realized, and the stability and durability of battery operation are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, and in particular to a high-temperature fuel cell structure and a series-parallel fuel cell stack structure. Background Art

[0002] Solid oxide fuel cell (SOFC) is a highly efficient, low-pollution energy conversion technology that uses solid oxide as an electrolyte to directly convert chemical energy into electrical energy. The working principle of SOFC is based on redox reactions, in which fuels such as hydrogen and methane react with oxygen at high temperatures to produce electrons and oxygen ions. The electrons pass through an external circuit to generate current, and the oxygen ions are transferred to the cathode through the electrolyte and combine with the electrons again to form products such as water or carbon dioxide.

[0003] Since SOFC works at high temperatures of 600-1000℃, it has the advantages of high efficiency, high power density and fuel flexibility, and is considered to be the best choice for the prime mover of the cogeneration system. However, its single chip power is low and it is difficult to use it alone. It needs to be installed in the same structure to better play its function; therefore, how to eliminate inter-chip stress and high-temperature thermal stress has always been a difficulty in the installation structure. Utility Model Content

[0004] The purpose of the utility model is to provide a high-temperature fuel cell structure and a series-parallel stack structure, which protects the thermal deformation of the battery cell array by combining rigid fixation and flexible contact, realizes the stacking of multiple battery cells, and avoids the situation where the solid fuel cell is damaged and loses its function due to thermal deformation and brittle cracking of the matrix when working at high temperature, so as to solve the problems pointed out in the background technology.

[0005] The embodiment of the utility model is realized by the following technical solution: a high temperature fuel cell structure, comprising:

[0006] an anode plate extending in a first direction, wherein the anode plate is provided with a fuel gas inlet and a fuel gas distribution area opened inside the anode plate and connected to the fuel gas inlet;

[0007] A cathode plate extending in a first direction, wherein the cathode plate is provided with a fuel gas outlet and a cathode gas collecting area opened inside the cathode plate and connected to the fuel gas outlet;

[0008] The battery cell array is arranged between the anode plate and the cathode plate along the second direction through a supporting substrate fixedly connected to the inner side of the anode plate and the cathode plate and is in flexible contact with the supporting substrate, and the two ends of the battery cell array are respectively connected to the fuel gas distribution area and the cathode gas collection area, and the first direction is perpendicular to the second direction.

[0009] According to a preferred embodiment, the support substrate is provided with a grid hole array along a first direction, and the battery cell array is embedded in the grid hole array.

[0010] According to a preferred embodiment, a gap is left between the battery cell array and the grid hole array.

[0011] According to a preferred embodiment, elastic sealant is poured into the gap between the battery cell array and the grid hole array.

[0012] According to a preferred embodiment, the anode plate and / or cathode plate is provided with a cooling structure, the cooling structure comprising a cooling medium inlet, a cooling medium outlet and a cooling medium channel located between the cooling medium inlet and the cooling medium outlet, and the two ends of the cooling medium channel are respectively connected to the cooling medium inlet and the cooling medium outlet.

[0013] According to a preferred embodiment, two or more cooling medium channels are provided.

[0014] According to a preferred embodiment, the cooling medium inlet and the cooling medium outlet are connected with outlet pipes.

[0015] According to a preferred embodiment, a cooling device is provided on the outer side of the anode plate and / or the cathode plate.

[0016] The utility model also provides a series-parallel stack structure composed of the above-mentioned high-temperature fuel cell structure, including N of the above-mentioned high-temperature fuel cell structures, and two adjacent high-temperature fuel cell structures are connected by lead-out pipes to form a series or parallel stack, and N is a positive integer greater than or equal to 2.

[0017] The technical solution of a high-temperature fuel cell structure and a series-parallel stack structure in the embodiment of the utility model has at least the following advantages and beneficial effects: the high-temperature fuel cell structure protects the thermal deformation of the battery cell array by combining rigid fixation and flexible contact, realizes the stacking of multiple battery cells, and avoids the situation where the solid fuel cell is damaged and loses its function due to thermal deformation and brittle cracking of the matrix when working at high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a high-temperature fuel cell provided in Example 1 of the utility model;

[0019] Figure 2 A front view of a high temperature fuel cell structure provided in Example 1 of the utility model;

[0020] Figure 3 A side view of a high temperature fuel cell structure provided in Example 1 of the utility model;

[0021] Figure 4 A schematic diagram of the structure of the support base provided in Example 2 of the utility model;

[0022] Figure 5 A schematic diagram of the connection gap between the cell array and the grid hole array provided in Example 2 of the utility model;

[0023] Figure 6 A schematic diagram of the structure of a high-temperature fuel cell provided in Example 3 of the present utility model;

[0024] Figure 7 and Figure 8 A schematic diagram of the cooling structure provided in Example 3 of the utility model;

[0025] Fig. 9 for Figure 7 AA cross-section diagram;

[0026] Fig.10 for Figure 8 BB cross-section diagram;

[0027] Fig.11 A bottom view of a high temperature fuel cell structure provided in Example 3 of the utility model;

[0028] Fig.12 A side view of a high temperature fuel cell structure provided in Example 3 of the present utility model;

[0029] Icon: 1- anode plate, 2- cathode plate, 3- battery cell array, 4- supporting substrate, 401- grid hole array, 5- cooling medium channel, 6- lead-out pipe, 7- gap. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Example 1

[0032] See also Figure 1 As shown, Figure 1 A schematic diagram of a high temperature fuel cell structure provided in an embodiment of the utility model. Specifically in this embodiment, the high temperature fuel cell structure is generally composed of an anode plate 1, a cathode plate 2 and a cell array 3. In one embodiment, the anode plate 1 and the cathode plate 2 of the high temperature fuel cell structure are rectangular plates, and the anode plate 1 and the cathode plate 2 are arranged at intervals.

[0033] The anode plate 1 extends along a first direction, and the anode plate 1 is provided with a fuel gas inlet and a fuel gas distribution area opened inside the anode plate 1 and connected to the fuel gas inlet. Regarding the fuel gas distribution area, in one implementation of the present embodiment, the fuel gas distribution area includes a plurality of cylindrical protrusions in an array combination, which can play a role in disturbing the flow, further disperse the fuel gas flow entering the battery cell array 3, and facilitate the uniform distribution of the fuel gas flow in the battery cell array 3. For more details, see Figure 2 As shown, the fuel gas inlet is an opening that passes through the front side of the anode plate 1 .

[0034] It should be noted and understood that the first direction in the present embodiment is the direction of the long sides of the anode plate 1 and the cathode plate 2 of the high-temperature fuel cell structure, and the second direction is the height direction of the anode plate 1 and the cathode plate 2 of the high-temperature fuel cell structure. The first direction and the second direction are perpendicular to each other. In addition, it should be understood that the verticality in the present invention is not absolutely vertical, and can be 90° or 90°±5°.

[0035] Furthermore, the cathode plate 2 also extends in the first direction, and is provided with an exhaust gas outlet and a cathode gas collecting area opened inside the cathode plate 2 and connected to the exhaust gas outlet. More specifically, the exhaust gas outlet is an opening penetrating the front side of the cathode plate 2.

[0036] See also Figure 3 As shown, the inner sides of the anode plate 1 and the cathode plate 2 are fixedly connected with a support substrate 4, and the support substrate 4 is used for installing the battery cell array 3, and respectively forms a sealed gas chamber with the anode plate 1 and the cathode plate 2. More specifically, the battery cell array 3 is arranged between the anode plate 1 and the cathode plate 2 along the second direction through the support substrate 4 and is in flexible contact with the support substrate 4, and the two ends of the battery cell array 3 are respectively connected with the fuel gas distribution area and the cathode gas collection area; the fuel gas enters the fuel gas distribution area from the fuel gas inlet of the anode plate 1, and then enters the battery cell array 3 through the fuel gas distribution area, enters the cathode gas collection area after the reaction, and discharges the exhaust gas through the exhaust outlet.

[0037] In summary, the high-temperature fuel cell structure protects the thermal deformation of the battery cell array 3 by combining rigid fixation and flexible contact, realizes the stacking of multiple battery cells, and avoids the situation where the solid fuel cell is damaged and loses its function due to thermal deformation and brittle cracking of the matrix when working at high temperature.

[0038] Example 2

[0039] In this embodiment, see Figure 4As shown, the support base 4 is provided with a grid hole array 401 along the first direction, and the battery cell array 3 is embedded in the grid hole array 401. The grid hole array 401 plays a role in fixing and supporting the battery cell array 3, thereby ensuring the rigidity of the support base 4 structure. It should be noted that the groove depth of the grid hole array 401 needs to ensure the sealing of the two ends of the battery cell array 3 and the matching of the anode plate 1, cathode plate 2 of the high-temperature fuel cell structure with the battery cell array 3.

[0040] In one implementation of this embodiment, see Figure 5 As shown, a gap 7 is left between the battery cell array 3 and the grid hole array 401, and an elastic sealant is poured into the gap 7 between the battery cell array 3 and the grid hole array 401, which not only plays a sealing role, but also because the elastic sealant is a flexible body with a certain elasticity, it works together with the grid hole array 401 to make the supporting substrate 4 have a certain elasticity with respect to the battery cell array 3, thereby eliminating the assembly stress between the sheets of the battery cell array 3 and the stress and dimensional change caused by thermal deformation of the battery when working at high temperature, and ultimately achieving the effect of preventing the battery from being broken due to deformation and expansion caused by high temperature, making the battery work safe and reliable and increasing the service life.

[0041] Example 3

[0042] In this embodiment, see Figure 6 As shown, the anode plate 1 and / or cathode plate 2 is provided with a cooling structure. In one implementation of this embodiment, both the anode plate 1 and the cathode plate 2 are provided with a cooling structure. More specifically, the cooling structure includes a cooling medium inlet, a cooling medium outlet, and a cooling medium channel 5 located between the cooling medium inlet and the cooling medium outlet. The cooling medium channel 5 is provided with two or more; see Fig.11 As shown, the cooling medium inlet and the cooling medium outlet are connected with the lead-out pipe 6, and the two ends of the cooling medium channel 5 are respectively connected with the cooling medium inlet and the cooling medium outlet. The reaction heat generated by the battery cell array 3 is absorbed by the cooling medium channel 5 through heat conduction and is taken out through the lead-out pipe 6, which not only cools the two poles of the battery but also brings the heat energy to the required equipment outside the battery for recycling.

[0043] See also Figures 7 to 10 As shown, this embodiment provides two cooling structures, both of which are equipped with two cooling medium channels 5; Figure 7 A cooling structure is provided in which a cooling medium inlet and a cooling medium outlet are provided on both the front and back sides of an anode plate 1 and a cathode plate 2; Figure 8 A cooling structure is provided in which a cooling medium inlet and a cooling medium outlet are opened on the inner side of the anode plate 1 and the cathode plate 2. Fig. 9 and Fig.10 These are cross-sectional views of the cooling medium channel 5 .

[0044] More specifically, in order to improve the heat conduction effect of the cooling medium channel 5, a wavy flow channel can be designed to avoid adverse problems caused by excessive temperature of the anode plate 1 and the cathode plate 2 of the high-temperature fuel cell structure, effectively improve the thermal management capability of the high-temperature fuel cell structure, and enhance the stability and durability of the operation of the high-temperature fuel cell structure.

[0045] Example 4

[0046] Different from Example 3, the high-temperature fuel cell structure provided in this embodiment does not adopt the method of processing the cooling medium channel 5 on the anode plate 1 and the cathode plate 2, but chooses to set a cooling device on the outside of the anode plate 1 and / or the cathode plate 2.

[0047] Example 5

[0048] The present embodiment provides a series-parallel stack structure composed of the high-temperature fuel cell structure described in Example 3, including N of the high-temperature fuel cell structures. Two adjacent high-temperature fuel cell structures are connected and extended by a lead-out pipe 6 to form a series or parallel stack, thereby realizing multi-stack linkage operation, and N is a positive integer greater than or equal to 2.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high temperature fuel cell structure, characterized in that: include: An anode plate (1) extending in a first direction, the anode plate (1) being provided with a fuel gas inlet and a fuel gas distribution area opened inside the anode plate (1) and connected to the fuel gas inlet; A cathode plate (2) extending in a first direction, the cathode plate (2) being provided with a fuel gas outlet and a cathode gas collecting area opened inside the cathode plate (2) and connected to the fuel gas outlet; A cell array (3) is arranged between the anode plate (1) and the cathode plate (2) along a second direction through a support substrate (4) fixedly connected to the inner sides of the anode plate (1) and the cathode plate (2) and in flexible contact with the support substrate (4), and two ends of the cell array (3) are respectively connected to a fuel gas distribution area and a cathode gas collection area, and the first direction and the second direction are perpendicular to each other.

2. The high temperature fuel cell structure according to claim 1, characterized in that: The support base (4) is provided with a grid hole array (401) along a first direction, and the battery cell array (3) is embedded in the grid hole array (401).

3. The high temperature fuel cell structure according to claim 2, characterized in that: A gap (7) is left between the battery cell array (3) and the grid hole array (401).

4. The high temperature fuel cell structure according to claim 3, characterized in that: The gap (7) between the battery cell array (3) and the grid hole array (401) is filled with elastic sealant.

5. The high temperature fuel cell structure according to any one of claims 1 to 4, characterized in that: The anode plate (1) and / or cathode plate (2) is provided with a cooling structure, the cooling structure comprising a cooling medium inlet, a cooling medium outlet and a cooling medium channel (5) located between the cooling medium inlet and the cooling medium outlet, and the two ends of the cooling medium channel (5) are respectively connected to the cooling medium inlet and the cooling medium outlet.

6. The high temperature fuel cell structure according to claim 5, characterized in that: The cooling medium channels (5) are provided with two or more.

7. The high temperature fuel cell structure according to claim 5, characterized in that: The cooling medium inlet and the cooling medium outlet are connected with an outlet pipe (6).

8. The high temperature fuel cell structure according to any one of claims 1 to 4, characterized in that: A cooling device is provided on the outside of the anode plate (1) and / or the cathode plate (2).

9. A series-parallel fuel cell stack structure composed of the high-temperature fuel cell structure according to any one of claims 7 to 8, characterized in that: It comprises N high-temperature fuel cell structures, two adjacent high-temperature fuel cell structures are connected via a lead-out pipe (6) to form a series or parallel stack, and N is a positive integer greater than or equal to 2.

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