Electric pile assembly tool

Abstract

The utility model discloses an electric pile assembly tool. Belongs to the technical field of fuel cells, the stack assembly tool is used for assembling a stack of the fuel cell, the stack comprises a first end plate and a second end plate which are oppositely arranged, the stack assembly tool comprises a limiting column, the limiting column is suitable for penetrating through the first end plate and is connected with the second end plate, and scale marks are arranged on the outer surface of the limiting column. According to the technical scheme, the size of the stack core of the stack can be read in real time through the scale marks, so that the stack core of the stack is compressed to the preset size, the stack assembly efficiency is improved, the problem of overpressure of the stack core can be prevented, and the stack assembly quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, and more specifically, to a stack assembly tooling. Background Art

[0002] In the initial stage of fuel cell development, the industry usually chooses to first assemble small fuel cell stacks to verify the assembly process, testing methods, and the performance of each component, and then gradually transition to the assembly of high-power fuel cells. In the process of assembling small fuel cells, in order to reduce equipment and tooling investment and transformation, manual assembly methods are mostly selected.

[0003] When manually assembling the stack of a fuel cell, the stack is usually press-fitted with a fixed size controlled manually, that is, the core of the stack is compressed to a preset size. In this process, it is necessary to frequently measure whether the actual size of the core of the stack reaches the preset size, and it is necessary to stop the press-fitting in time when the core of the stack is compressed to the preset size. The efficiency of stack assembly is low, and it is easy to occur that due to untimely measurement of the size (failure to measure the actual size of the core in real time), the core size of the stack after press-fitting is smaller than the preset size, and the core is over-compressed, reducing the assembly quality of the stack. In addition, the core size of the stack is large, and it is difficult to measure the actual size of the core with external tools, and it is easy to have inaccurate measurement problems. Summary of the Utility Model

[0004] The utility model aims to at least partly solve one of the above technical problems in the prior art. For this reason, the utility model provides a stack assembly tooling, which is beneficial to improving the efficiency and quality of stack assembly.

[0005] According to the stack assembly tooling of the embodiment of the utility model, the stack assembly tooling is used for assembling the stack of a fuel cell. The stack includes a first end plate and a second end plate which are oppositely arranged. The stack assembly tooling includes a limit post, and the limit post is adapted to pass through the first end plate and be connected with the second end plate. The outer surface of the limit post has scale lines.

[0006] According to the stack assembly tooling of the embodiment of the utility model, the limit post passes through the first end plate of the stack and is connected with the second end plate. The outer surface of the limit post has scale lines. When assembling the stack, the core size of the stack can be read in real time through the scale lines, so as to compress the core of the stack to the preset size, which is beneficial to improving the efficiency of stack assembly and can prevent the problem of over-pressing of the core, thus being beneficial to improving the assembly quality of the stack.

[0007] According to some embodiments of the present utility model, the limiting column includes a connected connection section and a scale section. The connection section is adapted to be inserted and connected to the second end plate, the scale section is adapted to pass through the first end plate, and a plurality of the scale lines are provided on the outer surface of the scale section, and the plurality of scale lines are arranged at intervals along the axial direction of the scale section.

[0008] According to some embodiments of the present utility model, the distance d between any two adjacent scale lines is equal, and the distance d satisfies the relational expression: 0.5 mm ≤ d ≤ 10 mm.

[0009] According to some embodiments of the present utility model, the scale lines are annular.

[0010] According to some embodiments of the present utility model, the connection section includes a guiding portion and a connecting portion. The connecting portion is connected between the guiding portion and the scale section. Both the guiding portion and the connecting portion are adapted to abut against the second end plate within the second end plate. In the direction away from the connecting portion of the guiding portion, the diameter of the guiding portion gradually decreases.

[0011] According to some embodiments of the present utility model, the guiding portion has a frustum structure.

[0012] According to some embodiments of the present utility model, the limiting column further includes a flange section. The flange section is connected to one end of the scale section away from the connection section, and at least a part of the flange section is located radially outside the scale section.

[0013] According to some embodiments of the present utility model, the stack assembly tooling further includes a positioning pointer. The positioning pointer is detachably connected to the scale section and is movable along the axial direction of the scale section.

[0014] According to some embodiments of the present utility model, the positioning pointer is rotatable about the axis of the scale section.

[0015] According to some embodiments of the present utility model, the number of the limiting columns is multiple.

[0016] Some additional aspects and advantages of the present utility model will be given in the following description, some will become obvious from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0017] Figure 1 is a schematic diagram of a stack assembly tooling and a stack according to an embodiment of the present utility model;

[0018] Figure 2 is a cross-sectional view of a limiting column, a first end plate and a second end plate according to an embodiment of the present utility model;

[0019] Figure 3 Yes Figure 2 A three-dimensional perspective view after magnification at A;

[0020] Figure 4 It is a schematic diagram of a positioning pointer and a scale segment according to an embodiment of the present invention.

[0021] Reference numerals:

[0022] Limit post 1; connecting section 11; guiding part 111; connecting part 112; scale segment 12; scale line 121; flange segment 13;

[0023] Positioning pointer 2; pointer end 21; mounting end 22; opening 221;

[0024] Stack assembly tooling 10;

[0025] Stack 20; first end plate 201; second end plate 202; mounting hole 2021; stack core 203. Detailed implementation manners

[0026] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "horizontal", "bottom", "inner", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0029] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "attachment", "fixation" and the like shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection, an electrical connection or a connection capable of mutual communication; it may be a direct connection, or an indirect connection through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] The following will Figures 1 - 4 describe in detail the stack assembly tooling 10 according to an embodiment of the present utility model.

[0031] Referring to Figures 1 - 4 As shown, for the stack assembly tooling 10 according to an embodiment of the present utility model, the stack assembly tooling 10 is used for assembling the stack 20 of a fuel cell. The stack 20 includes a first end plate 201 and a second end plate 202 which are oppositely arranged. The stack assembly tooling 10 includes a limit post 1. The limit post 1 is adapted to pass through the first end plate 201 and be connected to the second end plate 202. A scale line 121 is provided on the outer surface of the limit post 1. When the stack 20 is assembled, the stack size of the stack 20 can be read in real time through the scale line 121, which is beneficial to quickly and accurately assemble the stack 20.

[0032] Wherein, the stack 20 of the fuel cell may further include an insulating plate, a current collector plate and a single cell. The insulating plate, the current collector plate and the single cell may form the stack core 203 of the stack 20 and be located between the first end plate 201 and the second end plate 202. The single cell may include a bipolar plate and an MEA (Membrane Electrode Assembly). When the stack 20 is assembled, a pressing force needs to be applied to assemble the first end plate 201, the insulating plate, the current collector plate, a plurality of single cells and the second end plate 202 together to form the stack 20, and compress the stack core 203 of the stack 20 to a preset size, thereby completing the assembly of the stack 20.

[0033] It can be understood that the limiting post 1 passes through the first end plate 201 and is connected to the second end plate 202. The limiting post 1 plays a guiding role for the first end plate 201. When the fuel cell stack 20 is assembled, under the action of the pressing force, the first end plate 201 can move along the axial direction of the limiting post 1 towards the direction close to the second end plate 202 to realize the press-fitting of the fuel cell stack 20. Through the scale line 121 aligned with the upper surface or the lower surface of the first end plate 201, the core size of the fuel cell stack 20 can be read in real time, without frequently measuring the core size of the fuel cell stack 20, so as to compress the core 203 of the fuel cell stack 20 to a preset size, which is beneficial to improving the assembly efficiency of the fuel cell stack 20, and can avoid the problem that the size measurement of the core 203 of the fuel cell stack 20 is not timely and exceeds the preset size, preventing the problem of overpressure of the core 203, and thus is beneficial to improving the assembly accuracy of the fuel cell stack 20 and the assembly quality of the fuel cell stack 20.

[0034] In some embodiments, the core size of the fuel cell stack 20 is read by aligning the lower surface of the first end plate 201 with the scale line 121. After the limiting post 1 is connected to the second end plate 202, the distance from the scale line 121 to the upper surface of the second end plate 202 can be the preset size of the core 203. When the fuel cell stack 20 is press-fitted, the lower surface of the first end plate 201 is pressed to align with the scale line 121, and the core 203 can be compressed to the preset size.

[0035] In other embodiments, referring to Figure 2 As shown, the core size of the fuel cell stack 20 is read by aligning the upper surface of the first end plate 201 with the scale line 121 for easy reading of the scale. The thickness of the first end plate 201 is b, the preset size of the core 203 is c, and after the limiting post 1 is connected to the second end plate 202, the distance from the scale line 121 to the upper surface of the second end plate 202 is a, and a = b + c. When the fuel cell stack 20 is press-fitted, the upper surface of the first end plate 201 is pressed to align with the scale line 121, and the core 203 can be compressed to the preset size.

[0036] For the fuel cell stack assembly tooling 10 according to the embodiment of the present invention, the limiting post 1 passes through the first end plate 201 of the fuel cell stack 20 and is connected to the second end plate 202. The outer surface of the limiting post 1 has a scale line 121. When the fuel cell stack 20 is assembled, the core size of the fuel cell stack 20 can be read in real time through the scale line 121, so as to compress the core 203 of the fuel cell stack 20 to a preset size, which is beneficial to improving the assembly efficiency of the fuel cell stack 20, and can prevent the problem of overpressure of the core 203, and thus is beneficial to improving the assembly quality of the fuel cell stack 20.

[0037] In some embodiments of the present invention, referring to Figure 2As shown, the limit post 1 includes a connected connection section 11 and a scale section 12. The connection section 11 is adapted to be inserted and connected with the second end plate 202, and the scale section 12 is adapted to pass through the first end plate 201. The outer surface of the scale section 12 has a plurality of scale lines 121, and the plurality of scale lines 121 are arranged at intervals along the axial direction of the scale section 12, so as to press the core 203 of the stack 20 to a preset size.

[0038] It can be understood that the connection section 11 is inserted and connected with the second end plate 202. During the assembly of the stack 20, the connection section 11 can be inserted into the second end plate 202. After the assembly of the stack 20 is completed, the connection section 11 can be taken out of the second end plate 202. The use of the limit post 1 is relatively flexible and convenient, which is beneficial to improving the convenience of the assembly of the stack 20.

[0039] The scale section 12 passes through the first end plate 201, and the scale section 12 can play a guiding role for the first end plate 201. During the assembly of the stack 20, the first end plate 201 can move along the axial direction of the scale section 12 towards the second end plate 202 under the action of the pressing force, realizing the press-fitting of the stack 20. Through the scale lines 121 aligned with the upper surface or the lower surface of the first end plate 201, the core size of the stack 20 can be read in real time, without frequently measuring the core size of the stack 20, so as to compress the core 203 of the stack 20 to a preset size, which is beneficial to improving the assembly efficiency of the stack 20.

[0040] In some embodiments of the present invention, the distance d between any two adjacent scale lines 121 is equal, and the distance d satisfies the relationship: 0.5 mm ≤ d ≤ 10 mm. For example, d can be 0.5 mm, 1 mm, 5 mm, 10 mm, etc., so as to facilitate reading the scale and accurately measure the core size of the stack 20 in a timely manner to ensure the assembly accuracy of the stack 20.

[0041] It can be understood that when d < 0.5 mm, the distance between any two adjacent scale lines 121 is relatively small, the scale lines 121 are relatively dense, and it is difficult to read the scale. When d > 10 mm, the distance between any two adjacent scale lines 121 is relatively large, the scale lines 121 are relatively sparse, and it is difficult to measure the core size of the stack 20 accurately in a timely manner. In this embodiment, d is in the range of 0.5 mm to 10 mm, and the distance between any two adjacent scale lines 121 is moderate, so as to facilitate reading the scale and accurately measure the core size of the stack 20 in a timely manner, which is beneficial to ensuring the assembly accuracy of the stack 20.

[0042] In some embodiments of the present invention, the scale lines 121 are annular, and the scale can be read at any angle in the circumferential direction of the scale section 12, which is beneficial to reading the core size of the stack 20.

[0043] In some embodiments of the present invention, refer toFigure 2 As shown, the connecting section 11 includes a guiding portion 111 and a connecting portion 112. The connecting portion 112 is connected between the guiding portion 111 and the scale section 12. Both the guiding portion 111 and the connecting portion 112 are adapted to abut against the second end plate 202 within the second end plate 202. In the direction away from the connecting portion 112 of the guiding portion 111, the diameter of the guiding portion 111 gradually decreases. The outer peripheral wall of the guiding portion 111 is configured as an inclined surface, which can play a guiding role when inserting the limiting post 1 into the second end plate 202, so as to facilitate the insertion of the limiting post 1 into the second end plate 202.

[0044] Referring to Figure 2 As shown, the second end plate 202 has a mounting hole 2021. The connecting section 11 is adapted to be inserted into the mounting hole 2021. The bottom surface of the guiding portion 111 is adapted to abut against the bottom wall of the mounting hole 2021. The second end plate 202 can support the limiting post 1 through the bottom wall of the mounting hole 2021. The side surfaces of both the guiding portion 111 and the connecting portion 112 are adapted to abut against the side wall of the mounting hole 2021, so as to radially limit the limiting post 1 and prevent the limiting post 1 from axially tilting.

[0045] It should be noted that the axial length of the connecting section 11 can be the same as the hole depth of the mounting hole 2021. The starting position of the scale line 121 on the scale section 12 can be the position where the scale section 12 is connected to the connecting section 11. Referring to Figure 2 As shown, the connecting section 11 is located within the mounting hole 2021, and the starting position of the scale line 121 is flush with the upper surface of the second end plate 202.

[0046] In some embodiments, the core size of the stack 20 is read by aligning the lower surface of the first end plate 201 with the scale line 121. Among them, the distance between the scale line 121 aligned with the lower surface of the first end plate 201 and the upper surface of the second end plate 202 is the size of the core 203. When the stack 20 is press-fitted, the lower surface of the first end plate 201 is pressed to align with the scale line 121 at a preset distance from the upper surface of the second end plate 202, and the core 203 can be compressed to the preset size.

[0047] In some other embodiments, referring to Figure 2 As shown, the core size of the stack 20 is read by aligning the upper surface of the first end plate 201 with the scale line 121 to facilitate reading the scale. Among them, the thickness of the first end plate 201 is b, the preset size of the core 203 is c. When the core 203 is at the preset size, the distance between the scale line 121 aligned with the upper surface of the first end plate 201 and the upper surface of the second end plate 202 is a, and a = b + c. When the stack 20 is press-fitted, the upper surface of the first end plate 201 is pressed to align with the scale line 121 at a distance of a from the upper surface of the second end plate 202, and the core 203 can be compressed to the preset size.

[0048] In some embodiments of the present invention, referring to Figure 2 As shown, the guide portion 111 is a truncated cone structure, and the bottom wall of the guide portion 111 is a plane, which is beneficial to improving the contact area between the guide portion 111 and the second end plate 202, thereby helping to improve the stability and reliability of the second end plate 202 in supporting the limiting column 1. The outer peripheral wall of the guide portion 111 is an inclined surface, which can play a guiding role, so that the limiting column 1 can be inserted into the second end plate 202.

[0049] In some embodiments of the present invention, referring to Figure 2 As shown, the limit column 1 also includes a flange section 13, which is connected to one end of the scale section 12 away from the connecting section 11. At least part of the flange section 13 is located radially outside the scale section 12. The flange section 13 can be used as a fulcrum of the limit column 1, which makes it convenient to use tools to remove the limit column 1 through the flange section 13, thereby facilitating the removal of the limit column 1.

[0050] In the related art, when the battery stack is installed, the entire core may shift horizontally and press against the limit column, causing the limit column to be stressed. Since the limit column has no fulcrum, it is difficult to remove the limit column. Figure 2 As shown, the flange section 13 and the scale section 12 can form a "T"-shaped structure, and the flange section 13 can be used as a fulcrum for the limit column 1, so that the limit column 1 can be removed through the flange section 13 using tools, thereby facilitating the removal of the limit column 1.

[0051] In some embodiments of the present invention, referring to Figure 4 As shown, the stack assembly tool 10 also includes a positioning pointer 2, which is detachably connected to the scale segment 12 and movable along the axial direction of the scale segment 12, so as to quickly measure the size of the core 203 of the stack 20 at various positions.

[0052] Reference Figure 4As shown, the positioning pointer 2 may have a pointer end 21 and a mounting end 22. The mounting end 22 may have an opening 221. When installing the positioning pointer 2, the mounting end 22 may be sleeved on the scale section 12 through the opening 221. The pointer end 21 is adapted to point to the stack 20. In the axial direction of the scale section 12, the core 203 of the stack 20 may be divided into multiple segments. By moving the positioning pointer 2, the pointer end 21 of the positioning pointer 2 can be made to point to the edge of any segment of the core 203. The size of each segment of the core 203 can be quickly measured through the scale where the mounting end 22 of the positioning pointer 2 is located. By measuring the size of each segment of the core 203, the pressure received by each segment of the core 203 can be detected, so as to verify whether the pressure inside the stack 20 is evenly distributed. In addition, when disassembling and assembling the limit post 1, the positioning pointer 2 can be removed from the scale section 12 to avoid interference between the positioning pointer 2 and the first end plate 201, which is convenient for the disassembly and assembly of the limit post 1.

[0053] In some embodiments, the positioning pointer 2 can be made of an elastic material such as spring steel. The positioning pointer 2 can be configured as a "C" - shaped structure. The mounting end 22 can be sleeved on the scale section 12 through the opening 221 and can be clamped on the scale section 12 by elastic force to achieve the installation of the positioning pointer 2. By pulling the positioning pointer 2 forcefully at the end far from the opening 221, the positioning pointer 2 can be separated from the limit post 1 to achieve the disassembly of the positioning pointer 2.

[0054] In some other embodiments, the positioning pointer 2 can be detachably connected to the scale section 12 through a fastener. Among them, the positioning pointer 2 can be configured as a "C" - shaped structure. The positioning pointer 2 can have a threaded hole, and the axis of the threaded hole can be perpendicular to the axis of the scale section 12. The fastener can be a screw. Screwing the fastener into the threaded hole can make the fastener abut against the scale section 12 to achieve the installation of the positioning pointer 2. Removing the fastener from the threaded hole can make the fastener separate from the scale section 12 to achieve the disassembly of the positioning pointer 2.

[0055] In some embodiments of the present utility model, the positioning pointer 2 can rotate around the axis of the scale section 12. By rotating the positioning pointer 2, the pointer end 21 of the positioning pointer 2 can be made to point to the core 203 of the stack 20, which is convenient for accurately measuring the size of the core 203 of the stack 20 at various positions.

[0056] In some embodiments of the present utility model, the number of the positioning pointers 2 can be multiple. The size of the core 203 of the stack 20 at various positions can be measured simultaneously through multiple positioning pointers 2, which is beneficial to simultaneously measuring the size of each segment of the core 203, so as to quickly verify whether the pressure inside the stack 20 is evenly distributed.

[0057] In some embodiments of the present utility model, referring to Figure 1 and Figure 2As shown, the number of the limiting posts 1 is multiple. The multiple limiting posts 1 can correspond to multiple parts of the first end plate 201. Each limiting post 1 is adapted to guide the corresponding part of the first end plate 201. When the fuel cell stack 20 is assembled, the multiple parts of the first end plate 201 can move synchronously along the axes of the corresponding multiple limiting posts 1 in the direction close to the second end plate 202, so that the scales corresponding to each part of the first end plate 201 are the same. There is no need for manual determination of the parallelism of the fuel cell stack 20 by means of point-by-point measurement, which is beneficial to improving the pressing efficiency of the fuel cell stack 20, facilitating the fuel cell stack 20 to reach the preset parallelism, and thus ensuring the quality of the fuel cell stack 20.

[0058] Among them, the first end plate 201 can be a rectangular plate, and the number of the limiting posts 1 can be six. They are grouped in pairs and arranged at intervals along the length direction of the first end plate 201. The two limiting posts 1 in each group are arranged at intervals in the width direction of the first end plate 201.

[0059] In some embodiments of the present invention, the fuel cell can be a hydrogen fuel cell. The first end plate 201 can be a blind end plate, and the second end plate 202 can be an air port end plate. Gases participating in the reaction such as hydrogen and air can enter the fuel cell through the air port end plate. The blind end plate is adapted to seal the fuel cell stack 20 to prevent gas leakage in the fuel cell stack 20.

[0060] According to the fuel cell stack assembly tooling 10 of the embodiment of the present invention, by marking scale lines 121 on the outer surface of the limiting posts 1 and using the multiple limiting posts 1 to guide the first end plate 201, the stack core size and parallelism of the fuel cell stack 20 can be quickly locked after stacking, pressing and offline of the fuel cell.

[0061] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0062] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A stack assembly tool, characterized in that: The stack assembly tool is used for assembling a fuel cell stack (20), the stack (20) comprising: a first end plate (201) and a second end plate (202) arranged opposite to each other, the stack assembly tool comprising: a limit column (1), the limit column (1) being suitable for passing through the first end plate (201) and being connected to the second end plate (202), the outer surface of the limit column (1) having scale marks (121).

2. The stack assembly tool according to claim 1, characterized in that: The limiting column (1) comprises: a connected connecting section (11) and a scale section (12), wherein the connecting section (11) is suitable for being plugged and connected to the second end plate (202), and the scale section (12) is suitable for passing through the first end plate (201), and the outer surface of the scale section (12) has a plurality of scale lines (121), and the plurality of scale lines (121) are arranged at intervals along the axial direction of the scale section (12).

3. The stack assembly tool according to claim 2, characterized in that: The distance d between any two adjacent scale lines (121) is equal, and the distance d satisfies the relationship: 0.5 mm ≤ d ≤ 10 mm.

4. The stack assembly tool according to claim 2, characterized in that: The scale mark (121) is in the shape of a ring.

5. The stack assembly tool according to claim 2, characterized in that: The connecting section (11) comprises: a guiding portion (111) and a connecting portion (112); the connecting portion (112) is connected between the guiding portion (111) and the scale section (12); the guiding portion (111) and the connecting portion (112) are both suitable for abutting against the second end plate (202) inside the second end plate (202); and the diameter of the guiding portion (111) gradually decreases in a direction in which the guiding portion (111) moves away from the connecting portion (112).

6. The stack assembly tool according to claim 5, characterized in that: The guide portion (111) is a truncated cone structure.

7. The stack assembly tool according to claim 2, characterized in that: The limiting column (1) further comprises: a flange section (13), the flange section (13) being connected to an end of the scale section (12) away from the connecting section (11), and at least a portion of the flange section (13) being located radially outside the scale section (12).

8. The stack assembly tool according to claim 2, characterized in that: The stack assembly tool further comprises: a positioning pointer (2), the positioning pointer (2) being detachably connected to the scale segment (12), and the positioning pointer (2) being movable along the axial direction of the scale segment (12).

9. The stack assembly tool according to claim 8, characterized in that: The positioning pointer (2) is rotatable around the axis of the scale segment (12).

10. The stack assembly tool according to any one of claims 1 to 9, characterized in that: The number of the limiting columns (1) is multiple.

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