Assembly tool and assembly method of molten carbonate fuel cell stack

Abstract

The present invention provides an assembly tool and assembly method for a molten carbonate fuel cell stack, the assembly tool comprising: a tray having a supporting surface suitable for parallel abutment with the bottom surface of a lower packaging plate; a ruler having multiple rulers vertically arranged on the supporting surface of the tray, the multiple rulers enclosing a polygonal structure, and the ruler having scales distributed along its length; each ruler is suitable for corresponding to the pores of the diaphragm and the bipolar plate, and the diaphragm and the bipolar plate are suitable for sliding through each ruler. The tray and the ruler in the present invention are arranged vertically, so that the tray and the lower packaging plate are parallel to each other to ensure that each ruler remains vertical; the scales on the ruler are used to determine whether the various penetration parts of the bipolar plate and the diaphragm are at the same height, and the angle is adjusted according to the actual situation to ensure that the bipolar plates and diaphragms of each layer are parallel to the lower packaging plate. The above-mentioned tool can ensure that the upper and lower packaging plates, the bipolar plates and the diaphragms are arranged parallel to each other, and avoid up and down offsets between the layers of the battery stack.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to an assembly tool and an assembly method for a molten carbonate fuel cell stack. Background Art

[0002] Molten carbonate fuel cells are a highly efficient, pollution-free, modularly assembled power generation device that can be used in fixed or distributed power generation scenarios. It is currently a power generation method that achieves near-zero carbon dioxide emissions.

[0003] The battery stack is composed of several single cells, with diaphragms and electrolytes placed between the cells to form a battery stack. The battery stack uses a wet seal at high temperatures, that is, the electrolyte dissolves and penetrates into the diaphragm to prevent gas leakage and escape.

[0004] At present, molten carbonate fuel cells are assembled manually and by machine. The assembly process is affected by the errors between single cells, which can easily lead to insufficient vertical accuracy of the battery stack and cause certain upward and downward offsets in each layer. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that each layer is prone to upward and downward displacement during the assembly process of the battery stack, thereby providing an assembly tool and an assembly method for a molten carbonate fuel cell stack.

[0006] In order to solve the above technical problems, the present invention provides an assembly tool for a molten carbonate fuel cell stack, comprising:

[0007] The tray has a supporting surface adapted to abut parallel to the bottom surface of the lower packaging plate;

[0008] A ruler is provided, which has a plurality of rulers vertically arranged on the supporting surface of the tray, and the plurality of rulers enclose a polygonal structure, and the ruler has scales distributed along its length direction; each of the rulers is suitable for corresponding to the pores of the diaphragm and the bipolar plate, and the diaphragm and the bipolar plate are suitable for sliding through each ruler.

[0009] Furthermore, the ruler has a plurality of marks arranged at intervals along its length direction, and the marks are used to determine whether the diaphragm and the bipolar plate correspond to it.

[0010] Furthermore, the mark is a notch provided on the ruler.

[0011] Furthermore, the mark is a protrusion extending out of the edge of the ruler, and the pores of the diaphragm and the bipolar plate are provided with a sleeve hole suitable for passing the protrusion.

[0012] Furthermore, the scale has four scales corresponding one-to-one to the pores of the diaphragm and the pores of the bipolar plate.

[0013] A method for assembling a molten carbonate fuel cell stack, the stack comprising: an upper packaging plate, a lower packaging plate, a bipolar plate and a diaphragm, wherein the upper packaging plate, the lower packaging plate and the diaphragm are all provided with pores, and the pores of the three are relatively connected up and down, and the battery stack is assembled using the assembly tool described in any one of the above schemes, comprising the following steps:

[0014] After the air holes on the lower packaging plate correspond to each scale one by one, the lower packaging plate is passed through each scale from top to bottom, and the bottom surface of the lower packaging plate is fitted with the supporting surface of the tray;

[0015] The diaphragm and the bipolar plate are sequentially penetrated on each scale, and the bipolar plate is located between two diaphragms; during the penetration of the diaphragm, the positions of the penetration parts on the same diaphragm are adjusted and kept at the same height by comparing the scale values ​​on each scale; during the penetration of the bipolar plate, the positions of the penetration parts on the same bipolar plate are determined and kept at the same height by comparing the scale values ​​on each scale;

[0016] When the diaphragm and bipolar plate are penetrated to the preset height, the diaphragm and bipolar plate are compared with the marks on the scales to determine whether the diaphragm and bipolar plate are skewed.

[0017] After completing the installation of the diaphragm and bipolar plate, proceed with the installation of the upper packaging plate;

[0018] After the upper packaging plate is penetrated, a vertical load is applied, and the upper packaging plate is connected to the lower packaging plate by means of prefabricated screws;

[0019] After completing the connection between the upper packaging plate and the lower packaging plate, withdraw the assembly tooling.

[0020] Furthermore, during the installation of the diaphragm and the bipolar plate, an electrolyte sheet needs to be placed in the circumferential direction between the diaphragm and the bipolar plate.

[0021] Furthermore, a groove having the same shape as the tray is provided on the bottom surface of the lower packaging plate, and the depth of the groove is consistent with the thickness of the tray.

[0022] The technical solution of the present invention has the following advantages:

[0023] 1. The assembly tooling of the molten carbonate fuel cell stack provided by the present invention has a tray and a ruler arranged vertically, and each ruler is ensured to be in a vertical state by making the tray parallel to the lower packaging plate; the scales on the ruler are used to determine whether the penetration parts of the bipolar plate and the diaphragm are at the same height, and the angle is adjusted according to the actual situation, thereby ensuring that the bipolar plates and diaphragms of each layer are parallel to the lower packaging plate. Through the above-mentioned tooling, it is possible to ensure that the upper and lower packaging plates, bipolar plates and diaphragms are arranged parallel to each other, thereby avoiding the occurrence of up and down deviations between the layers of the battery stack.

[0024] 2. The assembly tooling for the molten carbonate fuel cell stack provided by the present invention has marks arranged at intervals on the ruler, which is used for secondary detection of whether there is an upward and downward deviation between the layers of the battery stack, so as to make adjustments and ensure the installation quality.

[0025] 3. In the assembly method of the molten carbonate fuel cell stack provided by the present invention, an electrolyte sheet is placed circumferentially between the diaphragm and the bipolar plate to avoid wrinkles on the diaphragm and the bipolar plate when a vertical load is applied. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a front view of the assembly tool provided in the present invention.

[0028] Figure 2 It is a top view of the assembly tool provided in the present invention.

[0029] Figure 3 A schematic diagram of the battery stack structure.

[0030] Description of reference numerals:

[0031] 1. Tray; 2. Ruler; 3. Mark; 4. Upper packaging plate; 5. Lower packaging plate; 6. Diaphragm; 7. Bipolar plate; 8. Prefabricated screw; 9. Electrolyte sheet; 10. Electrode. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] Embodiment 1

[0037] The assembly tool for the molten carbonate fuel cell stack provided in this embodiment includes: a tray 1 and a ruler 2 connected to the tray 1 .

[0038] like Figure 1 , Figure 2 As shown, the tray 1 is a rectangular plate, the cross-sectional dimensions of the rectangular plate are consistent with the groove on the bottom surface of the lower packaging plate 5, and the thickness of the rectangular plate is consistent with the depth of the groove; after the tray 1 is embedded in the groove, the bottom surface of the tray 1 is flush with the bottom surface of the lower packaging plate 5. Multiple rulers 2 are vertically connected to the supporting surface of the tray 1, and multiple rulers 2 form a polygonal structure; since the pores on the diaphragm 6 and the bipolar plate 7 are distributed in a rectangular shape, and each has four, the ruler 2 in this embodiment has four corresponding pores.

[0039] like Figure 1 As shown, each of the rulers 2 has scales distributed along its length, and the scales are used to record the height values ​​of each penetration portion of the diaphragm 6 and the bipolar plate 7. The ruler 2 has a plurality of marks 3 arranged at intervals along its length, and the marks 3 are used to determine whether the diaphragm 6 and the bipolar plate 7 correspond to it; in this embodiment, the marks 3 are notches arranged on the ruler 2, and the positions of the notches are set according to the thickness of the diaphragm 6 and the bipolar plate 7, and each notch should correspond to and be flush with the diaphragm 6; if there is a phenomenon of non-correspondence or non-flatness, it means that the installed diaphragm 6 and the bipolar plate 7 are deflected up and down, and need to be adjusted.

[0040] As an alternative embodiment, the mark 3 is a protrusion extending from the edge of the scale 2, and the pores of the diaphragm 6 and the bipolar plate 7 are provided with a sleeve hole suitable for passing the protrusion. The position of the protrusion is set according to the thickness of the diaphragm 6 and the bipolar plate 7, and each protrusion should be embedded in the sleeve hole of the diaphragm 6; if the protrusion is not embedded in the sleeve hole of the diaphragm 6, it means that the installed diaphragm 6 and the bipolar plate 7 are tilted up and down and need to be adjusted. Wherein, the protrusion is an arc structure or a sharp angle structure.

[0041] Embodiment 2

[0042] like Figure 3 As shown, the molten carbonate fuel cell stack is composed of an upper packaging plate 4, a lower packaging plate 5, a plurality of bipolar plates 7 and a plurality of diaphragms 6. The upper packaging plate 4, the lower packaging plate 5 and the diaphragm 6 are all provided with air holes, and the air holes of the three are relatively connected up and down; the assembly steps of the above-mentioned battery stack are as follows:

[0043] Step 1: After the air holes on the lower packaging plate 5 correspond one by one to each scale 2, the lower packaging plate 5 is penetrated on each scale 2 from top to bottom; the tray 1 is embedded in the groove on the bottom surface of the lower packaging plate 5, and the bottom surface of the tray 1 is flush with the bottom surface of the lower packaging plate 5.

[0044] Step 2: The plates are sequentially penetrated on each scale 2, and the bipolar plate 7 is located between two diaphragms 6; in the process of penetrating the diaphragm 6, the positions of the penetration parts on the same diaphragm 6 are adjusted and kept at the same height by comparing the scale values ​​on each scale 2; in the process of penetrating the bipolar plate 7, the positions of the penetration parts on the same bipolar plate 7 are determined and kept at the same height by comparing the scale values ​​on each scale 2;

[0045] At the same time, during the installation of the diaphragm 6 and the bipolar plate 7, an electrolyte sheet 9 needs to be placed in the circumferential direction between the diaphragm 6 and the bipolar plate 7. The upper and lower ends of the bipolar plate 7 both have electrodes 10 protruding outwards, and the protruding distance of the electrode 10 is 0.2 mm, so the thickness of the electrolyte sheet 9 is set to 0.2 mm.

[0046] Step 3: When the diaphragm 6 and the bipolar plate 7 are penetrated to a preset height, the diaphragm 6 and the bipolar plate 7 are compared with the marks 3 on the scales 2 to determine whether the penetrated diaphragm 6 and the bipolar plate 7 are skewed;

[0047] Step 4: After completing the installation of the diaphragm 6 and the bipolar plate 7, the upper packaging plate 4 is installed;

[0048] Step 5: After the upper packaging plate 4 is penetrated, a vertical load is applied, and the upper packaging plate 4 is connected to the lower packaging plate 5 by means of a prefabricated screw 8;

[0049] Step 6: After completing the connection between the upper packaging plate 4 and the lower packaging plate 5, remove the assembly tool.

[0050] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An assembly tool for a molten carbonate fuel cell stack, characterized in that: include: The tray (1) has a supporting surface suitable for parallel abutment with the bottom surface of the lower packaging plate (5); A ruler (2) having a plurality of rulers vertically arranged on the supporting surface of the tray (1), the plurality of rulers (2) forming a polygonal structure, the ruler (2) having scales distributed along its length direction; each of the rulers (2) is suitable for corresponding to the pores of the diaphragm (6) and the bipolar plate (7), and the diaphragm (6) and the bipolar plate (7) are suitable for slidingly penetrating each of the rulers (2); The scale (2) has a plurality of marks (3) arranged at intervals along its length, and the marks (3) are used to determine whether the diaphragm (6) and the bipolar plate (7) correspond to it; The battery stack comprises: an upper packaging plate (4), a lower packaging plate (5), a bipolar plate (7) and a diaphragm (6), wherein the upper packaging plate (4), the lower packaging plate (5) and the diaphragm (6) are all provided with air holes, and the air holes of the three are relatively connected up and down; The method for assembling a fuel cell stack using the assembly tool of the molten carbonate fuel cell stack comprises the following steps: After the air holes on the lower packaging plate (5) correspond to the scales (2) one by one, the lower packaging plate (5) is inserted into the scales (2) from top to bottom, and the bottom surface of the lower packaging plate (5) is made to fit the supporting surface of the tray (1); The diaphragm (6) and the bipolar plate (7) are sequentially penetrated on each scale (2), and the bipolar plate (7) is located between two diaphragms (6); during the penetration of the diaphragm (6), the positions of the penetration parts on the same diaphragm (6) are adjusted and kept at the same height by comparing the scale values ​​on each scale (2); during the penetration of the bipolar plate (7), the positions of the penetration parts on the same bipolar plate (7) are determined and kept at the same height by comparing the scale values ​​on each scale (2); When the diaphragm (6) and the bipolar plate (7) are penetrated to a preset height, by comparing with the marks (3) on the scales (2), it is determined whether the penetrated diaphragm (6) and the bipolar plate (7) are deflected; After the diaphragm (6) and the bipolar plate (7) are drilled, the upper packaging plate (4) is drilled; After the upper packaging plate (4) is penetrated, a vertical load is applied, and the upper packaging plate (4) is connected to the lower packaging plate (5) by means of a prefabricated screw rod (8); After the connection between the upper packaging plate (4) and the lower packaging plate (5) is completed, the assembly tool is withdrawn.

2. The assembly tool for a molten carbonate fuel cell stack according to claim 1, characterized in that: The mark (3) is a notch arranged on the ruler (2).

3. The assembly tool for a molten carbonate fuel cell stack according to claim 1, characterized in that: The mark (3) is a protrusion extending out of the edge of the scale (2), and the pores of the diaphragm (6) and the bipolar plate (7) are provided with a sleeve hole suitable for passing the protrusion.

4. The assembly tool for a molten carbonate fuel cell stack according to claim 1, characterized in that: The scale (2) has four scales corresponding one-to-one to the pores of the diaphragm (6) and the pores of the bipolar plate (7).

5. The assembly tool for a molten carbonate fuel cell stack according to claim 1, characterized in that: During the process of installing the diaphragm (6) and the bipolar plate (7), an electrolyte sheet (9) needs to be placed in the circumferential direction between the diaphragm (6) and the bipolar plate (7).

6. The assembly tool for a molten carbonate fuel cell stack according to claim 1, characterized in that: The bottom surface of the lower packaging plate (5) is provided with a groove having the same shape as the tray (1), and the depth of the groove is consistent with the thickness of the tray (1).

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