Fixing components for fuel cell stacks

Abstract

The present invention provides a fixing assembly for a fuel cell stack, which includes a group of binding members and a group of first fasteners, wherein each of the binding members has two fixed ends and a binding portion extending between the fixed ends, wherein the first fasteners are respectively arranged at the fixed ends of the binding members, and the first fasteners are arranged to be connected to each other.

Description

Technical Field

[0001] The present invention relates to a fuel cell, and in particular to a fixing assembly for a fuel cell stack. Background Art

[0002] A fuel cell, such as a proton exchange membrane fuel cell, is a power generation device that converts the chemical energy in a fuel directly into electrical energy through an electrochemical reaction. However, the voltage and output power that a single fuel cell (or fuel cell monomer) can provide are relatively low. In practical applications, multiple fuel cell monomers are generally stacked together to form a fuel cell stack that can provide high voltage and high power. Accordingly, since a fuel cell stack is formed by stacking multiple fuel cell monomers together, and each fuel cell monomer requires good airtightness, the assembly or assembly of the fuel cell stack has to be carefully designed to reduce its manufacturing cost and ensure the stable quality of the fuel cell.

[0003] Japanese patent application number JP1999069590 discloses a fixing assembly that can stack multiple fuel cell units together to form a fuel cell stack. The fixing assembly disclosed in this patent application uses fixing screws inserted into the separators of the fuel cell stack to secure the entire fuel cell stack together. However, since the screws can only provide pressure to the fuel cell stack through the bolts on them, to ensure uniform force across all areas of the fuel cell stack and that the fuel cell stack is well secured, the fuel cell stack must be equipped with multiple fixing screws, and these fixing screws must be evenly distributed. In other words, the fixing screws of the fuel cell stack disclosed in this patent application have to occupy the area of ​​the plate that should be used to set the flow field. This inevitably leads to an increase in the size of the fuel cell stack and an increase in the manufacturing cost of the fuel cell stack. In addition, since both the plate and separator of the fuel cell stack are provided with at least two through-holes, the processing and manufacturing of the fuel cell stack's plate are also increased. Summary of the Invention

[0004] The main purpose of the present invention is to provide a fixing assembly for a fuel cell stack, wherein the fixing assembly for a fuel cell stack of the present invention is configured to apply force to the bearing surface of the end plate of the fuel cell stack to ensure that the fuel cell stack is fixed.

[0005] Another object of the present invention is a fixing assembly for a fuel cell stack, wherein the fixing element of the fixing assembly for a fuel cell stack does not need to pass through the plate, thereby preventing the fixing assembly from affecting the structure of the plate of the fuel cell stack.

[0006] Another object of the present invention is a mounting assembly for a fuel cell stack. The mounting assembly is positioned externally to the fuel cell stack, significantly increasing the area of ​​the fuel cell stack's plates available for providing a flow field. Consequently, the mounting assembly can significantly reduce the fuel cell stack's volume and improve its power-to-volume ratio.

[0007] Another object of the present invention is to provide a fixing assembly for a fuel cell stack, wherein the fixing assembly for a fuel cell stack of the present invention can optimize the assembly process of the fuel cell stack and reduce the manufacturing difficulty and manufacturing cost of the fuel cell stack.

[0008] Another object of the present invention is a mounting assembly for a fuel cell stack, wherein the mounting assembly for a fuel cell stack of the present invention is configured to apply pressure to the fuel cell stack through the load-bearing surface of the end plate of the fuel cell stack. In other words, the force provided by the mounting assembly for a fuel cell stack of the present invention is applied directly to the load-bearing surface of the end plate, rather than to a smaller area of ​​the end plate, thereby avoiding uneven force application to different areas of the fuel cell stack.

[0009] Another object of the present invention is a fixing assembly for a fuel cell stack, wherein the fixing assembly for a fuel cell stack of the present invention is configured to be fixed to the fuel cell stack through the guide grooves and limit grooves of the end plate of the fuel cell stack, thereby reducing the assembly difficulty of the fuel cell stack and improving the assembly accuracy.

[0010] Another object of the present invention is to provide a fixing assembly for a fuel cell stack, wherein the fixing assembly for a fuel cell stack of the present invention does not require precise components and a complex structure, and has a simple manufacturing process and low cost.

[0011] Other objects and features of the present invention will be more fully apparent from the following detailed description and will be achieved by means of the combination of means and devices particularly pointed out in the appended claims.

[0012] According to one aspect of the present invention, a fixing assembly for a fuel cell stack of the present invention that can achieve the aforementioned and other objects and purposes includes:

[0013] a set of restraints; and

[0014] A group of first fasteners, wherein each of the binding members has two fixed ends and a binding portion extending between the fixed ends, wherein the first fasteners are respectively arranged at the fixed ends of the binding members, wherein the first fasteners are arranged to be connected together.

[0015] According to another aspect of the present invention, the present invention further provides a fuel cell stack comprising:

[0016] two end plates;

[0017] at least one fuel cell, wherein the fuel cell is stacked between two end plates; and

[0018] A group of restraints, wherein the restraints are arranged to be restrained on the outside of the two end plates along the stacking direction of the fuel cell monomers, and the restraints are arranged to apply restraining force to the end plates, thereby ensuring that the fuel cell monomers are stacked between the two end plates.

[0019] According to a preferred embodiment of the present invention, the restraining member can be any object having a restraining function. Preferably, the restraining member is in the shape of a belt.

[0020] According to another aspect of the present invention, the present invention further provides an end plate for a fuel cell stack, wherein the end plate has an outer side and a plurality of limiting groove pairs arranged on the outer side, wherein each of the limiting groove pairs includes two relatively arranged limiting grooves.

[0021] Furthermore, the end plate further has a set of guide grooves, wherein the guide grooves are arranged parallel to each other and there is a preset distance between the guide grooves.

[0022] Preferably, the width of the guide groove of the end plate is the same as the width of the binding portion of the binding member of the fixing assembly for the fuel cell stack of the present invention.

[0023] According to another aspect of the present invention, the present invention further provides a stacking method for a fuel cell stack, comprising the following steps:

[0024] (A) positioning the restraints of the restraint assembly laterally and horizontally;

[0025] (B) making the restraining members of the restraining member set parallel to each other;

[0026] (C) placing an end plate longitudinally on the tie member so that the outer side of the end plate is located at a predetermined position of the tie portion of each tie member of the tie member set;

[0027] (D) stacking a fuel cell monomer on the end plate;

[0028] (E) stacking another fuel cell unit on the previous fuel cell unit;

[0029] (F) repeating step (E) a preset number of times;

[0030] (G) placing another end plate longitudinally above the uppermost fuel cell cell; and

[0031] (H) Connect the two fixed ends of each binding member of the binding member group together and tighten them.

[0032] Further objects and purposes of the present invention will become more fully apparent through an understanding of the following description and accompanying drawings.

[0033] These and other objects, features and purposes of the present invention will become more fully apparent from the following detailed description, accompanying drawings and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 FIG. 4 is a front view of a fuel cell stack according to a preferred embodiment of the present invention.

[0035] Figure 2 1 is an exploded view of a fuel cell stack according to a preferred embodiment of the present invention.

[0036] Figure 3 3D is a perspective view of a fixing assembly of a fuel cell stack according to a preferred embodiment of the present invention.

[0037] Figure 4 3D is a perspective view of a restraining member of a fixing assembly of a fuel cell stack according to a preferred embodiment of the present invention.

[0038] Figure 5 1 is an enlarged view of a first fastener of a fixing assembly of a fuel cell stack according to a preferred embodiment of the present invention.

[0039] Figure 6 3D is a perspective view of an end plate of a fuel cell stack according to a preferred embodiment of the present invention.

[0040] Figure 7 FIG. 1 is a top view of a fuel cell stack according to a preferred embodiment of the present invention, wherein the fuel cell stack shown in the figure is fixed.

[0041] Figure 8 FIG. 1 is a perspective view of a fuel cell stack according to a preferred embodiment of the present invention, wherein the fuel cell stack shown in the figure is stacked and to be fixed.

[0042] Figure 9 is a flow chart of a stacking method for a fuel cell stack according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0043] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0044] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, which 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 orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0045] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0046] Reference to the accompanying drawings Figures 1 to 8 As shown, a fuel cell stack according to a preferred embodiment of the present invention is illustrated, wherein the fuel cell stack includes two end plates 10, a group of fuel cell cells 20, and a group of restraints 30. The fuel cell cells (or fuel cell cell groups) 20 are stacked between the two end plates 10. The restraints 30 are respectively arranged to restrain the outer sides 11 of the two end plates 10 along the stacking direction of the fuel cell cells 20. The restraints 30 are configured to apply a restraining force to the end plates 10, thereby ensuring that the fuel cell cells 20 are stacked between the two end plates 10. In other words, when the restraints 30 are restrained by the two end plates 10 of the fuel cell stack, the restraining force provided by the restraints 30 is applied to the fuel cell cells (groups) 20 of the fuel cell stack through the end plates 10, thereby squeezing the fuel cell cells 20 together under the action of force. It will be appreciated by those skilled in the art that the end plates 10 of the fuel cell stack can be of any shape. However, it is apparent that when the end plates 10 are square, it is more convenient to stack the fuel cell stack and restrain the fuel cell cells 20 by the restraints 30. Therefore, preferably, the end plates 10 of the fuel cell stack of the present invention are square. More preferably, the end plates 10 of the fuel cell stack of the present invention are elongated, and the fuel cell stack of the present invention is an elongated (or elongated) fuel cell stack. It is understood that the two end plates 10 of the fuel cell stack of the present invention serve to support the fuel cell monomers 20 and, therefore, can also be considered support plates.

[0047] It is worth noting that the fuel cell stack of the present invention can be a proton exchange membrane fuel cell or other types of fuel cells, such as a methane fuel cell. The fuel cell of the present invention can be air-cooled or water-cooled. In other words, the type of fuel cell stack in the examples of the present invention should not limit the scope of protection of the present invention. For example, the fuel cell stack of the present invention is a hydrogen fuel cell stack, and each fuel cell monomer 10 includes at least an anode plate, a cathode plate, and a membrane electrode assembly disposed therebetween.

[0048] As shown in the attached figure Figures 1 to 8 As shown, the restraining member 30 of the fuel cell stack according to a preferred embodiment of the present invention includes two fixed ends 31 and a restraining portion 32 extending between the two fixed ends 31. The restraining member 30 is adapted to be restrained to the end plate 10 of the fuel cell stack by connecting the fixed ends 31 together. It will be appreciated that the restraining portion 32 of the restraining member 30 of the fuel cell stack of the present invention may be any mechanism capable of restraining the outer side 11 of the end plate 10 of the fuel cell stack. Preferably, the restraining portion 32 of the restraining member 30 is a restraining belt.

[0049] As shown in the attached figure Figures 1 to 8 As shown, the fuel cell stack according to a preferred embodiment of the present invention further includes a set of first fasteners 40, wherein the first fasteners 40 are respectively disposed at the fixed ends 31 of the restraining member 30, wherein the first fasteners 40 are configured to be connected together. Furthermore, the first fasteners 40 include a main body 41 and two fastening tabs 42 extending outward from the main body 41, wherein the fastening tabs 42 have a through hole 420. It will be understood that the two first fasteners 40 respectively disposed at the fixed ends 31 of the restraining member 30 can be connected and fixed together through their through holes 420. Preferably, the through holes 420 of the first fasteners 40 extend in the same direction as the restraining portion 32 of the restraining member 30, thereby facilitating the two first fasteners 40 disposed at the fixed ends 31 of the restraining member 30 to be fixed together.

[0050] It is noteworthy that the length of the main body 41 of the first fastener 40 of the fuel cell stack of the present invention is set to be no less than the width of the fixed end 31 of the restraining member 30, so that the fixed end 31 can be fixed to the main body 41 of the first fastener 40. Furthermore, the width of the restraining portion 32 of the restraining member 30 is set to be no greater than the width of the fixed end 31, so that the user can adjust the length of the restraining portion 32 of the restraining member 30 restrained to the fuel cell stack by wrapping the restraining portion 32 of the restraining member 30 around the main body 41 of the first fastener 40 or wrapping the restraining portion 32 around the main body 41 of the first fastener 40.

[0051] As shown in the attached figure Figures 1 to 8 As shown, the main body 41 of the first fastener 40 of the fuel cell stack according to a preferred embodiment of the present invention further has a set of fixing holes 410 , wherein the fixing end 31 of the restraining member 30 is fixed to the main body 41 through the fixing holes 410 .

[0052] As shown in the attached figure Figure 7 and Figure 8 As shown, the fuel cell stack according to a preferred embodiment of the present invention further includes a set of second fasteners 50, each of which includes a fastening screw 51 and a fastening nut 52 threadedly connected to the fastening screw 51. The threaded end 511 of the fastening screw 51 is configured to pass through the through-hole 420 of the fastening joint 42 of the first fastener 40. The user can adjust the distance between the two first fasteners 40 respectively provided at the fixed end 31 of the restraint 30 by adjusting the fastening nut 52 threaded thereon, thereby adjusting the restraining strength of the restraint 30 on the end plate 10 (or the fuel cell cell 20) of the fuel cell stack. It can be understood that because the first fasteners 40 of the fuel cell stack of the present invention are fixed together by the second fasteners 50, the connection between the two first fasteners 40 provided on the same restraint 30 can be easily released.

[0053] As shown in the attached figure Figures 6 to 8 As shown, the end plate 10 of the fuel cell stack according to a preferred embodiment of the present invention further comprises a plurality of retaining groove pairs 100, wherein each retaining groove pair 100 includes two spaced retaining grooves 101, wherein the distance between the two retaining grooves 101 of the retaining groove pair 100 is set to be the same as the length of the main body 41 of the first fastener 40, and the shape and size of the two retaining grooves 101 of the retaining groove pair 100 are respectively designed to be based on the shape and size of the fastening joint 42 of the first fastener 40, so that the fastening joint 42 of the first fastener 40 can be respectively placed in the retaining grooves 101 of the retaining groove pair 100, thereby preventing the restraining member 30 from sliding relative to the outer side 11 of the end plate 10 under the action of external force after being restrained to the end plate 10 of the fuel cell stack by the first fastener 40. In particular, the restraining member 30 is prevented from sliding relative to the end plate 10 when the user adjusts the restraining strength of the restraining member 30 on the fuel cell stack via the second fastener 50.

[0054] As shown in the attached figure Figures 6 to 8As shown, the end plate 10 of the fuel cell stack according to a preferred embodiment of the present invention has a set of guide grooves 102, wherein the guide grooves 102 are transversely disposed on the outer side 11 of the end plate 10. The width of the guide grooves 102 is configured to be the same as the width of the restraining portion 32 of the restraining member 30, so that the restraining portion 32 of the restraining member 30 can be precisely positioned within the guide grooves 102, thereby preventing the restraining portion 32 of the restraining member 30 from sliding longitudinally. Preferably, the guide grooves 102 of the end plate 10 of the fuel cell stack according to the present invention are respectively disposed between the two guide grooves 101 of the guide groove pair 100, so that when the fixed end 32 of the restraining member 30 is secured together by the first fastener 40 and the second fastener 50, the restraining portion 32 of the restraining member 30 can be precisely positioned within the guide grooves 102, thereby preventing the restraining portion 32 of the restraining member 30 from sliding longitudinally. It can be understood that, under the action of the limiting groove 101 and the guide groove 102 of the end plate 10, after the restraining member 30 is restrained to the fuel cell stack, the sliding of the restraining member 30 relative to the end plate 10 is effectively prevented. In other words, unless the connection between the two fixed ends 32 of the restraining member 30 is broken by an external force tool, the restraining member 30 disposed on the end plate 10 of the fuel cell stack will be difficult to fall off the end plate 10. More preferably, the guide grooves 102 are arranged parallel to each other, and a predetermined distance is provided between each adjacent guide groove 102. Most preferably, the predetermined distances between the guide grooves 102 are the same.

[0055] As shown in the attached figure Figures 6 to 8 As shown, further, the guide groove 102 of the end plate 10 of the fuel cell stack of the present invention has a bottom wall 1020, wherein the bottom wall 1020 of the guide groove 102 has two guide ends 1021, wherein the guide ends 1021 form an arc-shaped guide surface 1022 extending from the inside to the outside, so as to guide the restraining portion 32 of the restraining member 30 into the guide groove 102 when the user restrains the restraining member 30 to the end plate 10 of the fuel cell stack. Preferably, the bottom wall 1020 of the guide groove 102 is configured so that when the restraining member 30 is placed in the guide groove 102, the restraining portion 32 of the restraining member 30 can closely fit the bottom wall 1020 of the guide groove 102 of the end plate 10, so that the restraining member 30 can be stably restrained to the end plate 10 of the fuel cell stack and is not likely to slip.

[0056] It is worth noting that the limiting groove 101 and the guide groove 102 of the end plate 10 can be arranged to be interconnected and further arranged to be able to hide the first fastener 40 and the fixed end 31 and the restraining portion 32 of the restraining member 30 of the fuel cell stack of the present invention within the limiting groove 101 and the guide groove 102 of the end plate 10, so as to facilitate the use and subsequent assembly of the fuel cell stack of the present invention. It is known to those skilled in the art that when the first fastener 40 and / or the fixed end 31 and the restraining portion 32 of the restraining member 30 of the fuel cell stack of the present invention are protruding from the outside of the end plate 10, it will not only affect the external appearance of the fuel cell stack, but also affect the stable placement of the fuel cell stack, and may even affect the subsequent assembly and use of the fuel cell stack, such as connecting the fuel cell stack with a fuel supply device so that the fuel supply device can provide fuel to the fuel cell stack.

[0057] As shown in the attached figure Figures 1 to 8 As shown, according to a preferred embodiment of the present invention, the present invention further provides an end plate 10 for a fuel cell stack, wherein the end plate 10 has an outer side 11 and a plurality of limiting groove pairs 100 arranged on the outer side 11, wherein each limiting groove pair 100 includes two limiting grooves 101 arranged opposite to each other. Furthermore, the end plate 10 further has a set of guide grooves 102, wherein the guide grooves 102 are respectively arranged between the two limiting grooves 101 of the limiting groove pair 100. Preferably, the guide grooves 102 are arranged parallel to each other, and there is a preset distance between each two adjacent guide grooves 102. More preferably, the preset distances between the guide grooves 102 are the same.

[0058] As shown in the attached figure Figures 1 to 8 As shown, according to a preferred embodiment of the present invention, the present invention further provides a fixing assembly for a fuel cell stack, which includes a group of restraining members 30 and a group of first fasteners 40, wherein each of the restraining members 30 has two fixed ends 31 and a restraining portion 32 extending between the fixed ends 31, wherein the first fasteners 40 are respectively arranged at the fixed ends 31 of the restraining members 30, wherein the first fasteners 40 are arranged to be connected together.

[0059] As shown in the attached figure Figures 1 to 8As shown, the first fastener 40 of the fuel cell stack fastening assembly of the present invention includes a main body 41 and two fastening tabs 42 extending outward from the main body 41. Each fastening tab 42 has a through-hole 420. Accordingly, the two first fasteners 40 of the fastening assembly can be connected and secured together via their through-holes 420. Preferably, the length of the main body 41 of the first fastener 40 is set to be no less than the width of the fixed end 31 of the restraining member 30, so that the fixed end 31 can be secured to the main body 41 of the first fastener 40. More preferably, the width of the restraining portion 32 of the restraining member 30 is set to be no greater than the width of the fixed end 31, allowing the user to adjust the length of the restraining portion 32 of the restraining member 30 restrained to the fuel cell stack by wrapping the restraining portion 32 of the restraining member 30 around the main body 41 of the first fastener 40 or around the main body 41 of the first fastener 40.

[0060] As shown in the attached figure Figures 1 to 8 As shown, the fixing assembly for the fuel cell stack of the present invention further includes a group of second fasteners 50, wherein each of the second fasteners 50 includes a fastening screw 51 and a fastening nut 52 suitable for being threaded onto the fastening screw 51, wherein the threaded end 511 of the fastening screw 51 is configured to pass through the through hole 420 of the fastening joint 42 of the first fastener 40, and allows the user to adjust the distance between the two first fasteners 40 respectively arranged at the fixed end 31 of the restraint 30 by adjusting the fastening nut 52 threaded thereon, so as to adjust the restraining strength of the restraint 30 on the end plate 10 (or the fuel cell monomer 20) of the fuel cell stack.

[0061] As shown in the attached figure Figures 1 to 8 As shown, the fixing assembly for the fuel cell stack of the present invention further has a plurality of limit groove pairs 100 suitable for being arranged on the outer side of the end plate of the fuel cell stack, wherein each limit groove pair 100 includes two limit grooves 101 arranged at intervals, wherein the distance between the two limit grooves 101 of the limit groove pair 100 is set to be the same as the length of the main body 41 of the first fastener 40, and the shape and size of the two limit grooves 101 of the limit groove pair 100 are respectively designed according to the shape and size of the fastening joint 42 of the first fastener 40, so that the fastening joint 42 of the first fastener 40 can be placed in the limit groove 101 of the limit groove pair 100 respectively.

[0062] As shown in the attached figure Figures 1 to 8As shown, the fixing assembly for a fuel cell stack of the present invention further comprises a set of guide grooves 102 adapted to be disposed on the outer side of the end plate of the fuel cell stack, wherein the width of the guide grooves 102 is configured to be the same as the width of the restraining portion 32 of the restraining member 30, so that the restraining portion 32 of the restraining member 30 can be precisely placed within the guide grooves 102. Preferably, the guide grooves 102 of the fixing assembly for a fuel cell stack of the present invention are respectively disposed between the two guide grooves 101 of the guide groove pair 100.

[0063] As shown in the attached figure Figure 9 As shown, according to a preferred embodiment of the present invention, the present invention further provides a stacking method for a fuel cell stack, which includes the following steps:

[0064] (A) positioning the restraints of the restraint assembly laterally and horizontally;

[0065] (B) making the restraining members of the restraining member set parallel to each other;

[0066] (C) placing an end plate longitudinally on the tie member so that the outer side of the end plate is located at a predetermined position of the tie portion of each tie member of the tie member set;

[0067] (D) stacking a fuel cell monomer on the end plate;

[0068] (E) stacking another fuel cell unit on the previous fuel cell unit;

[0069] (F) repeating step (E) a preset number of times;

[0070] (G) placing another end plate longitudinally above the uppermost fuel cell cell; and

[0071] (H) Connect the two fixed ends of each binding member of the binding member group together and tighten them.

[0072] Furthermore, the step (H) comprises the following steps:

[0073] (H1) connecting together the two fixed ends of each tie member of the tie member set; and

[0074] (H2) respectively adjusting the distance between the two fixed ends of each restraining member of the restraining member group, thereby adjusting the restraining force applied by the restraining member to the end plate to a preset size, and making each restraining member tightened on the end plate.

[0075] Furthermore, preferably, two adjacent restraining members of the restraining member group of the fuel cell stack of the present invention are spaced apart by a preset distance.

[0076] Furthermore, the stacking method for a fuel cell stack of the present invention comprises the following steps:

[0077] (L) The binding portion of each binding member of the binding member set is placed in the guide groove of the end plate, wherein the guide grooves are respectively set at the preset positions.

[0078] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only for illustrative purposes and are not intended to limit the present invention.

[0079] The purpose of the present invention has been completely and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be modified or altered in any way without departing from the principles.

Claims

1. A fixing assembly for a fuel cell stack, characterized in that: include: two end plates; a set of restraints; A set of first fasteners, wherein each of the tie members has two fixed ends and a tie portion extending between the fixed ends, wherein the first fasteners are respectively arranged at the fixed ends of the tie members, and the first fasteners are arranged to be connected to each other, and the first fasteners include a main body and two fastening joints respectively extending outward from the main body, wherein the fastening joints have a through hole; A plurality of limit groove pairs and a group of guide grooves are all arranged on the end plate, wherein each limit groove pair includes two limit grooves arranged at intervals, wherein the distance between the two limit grooves of the limit groove pair is set to be the same as the length of the main body of the first fastener, and the shapes and sizes of the two limit grooves of the limit groove pair are respectively designed according to the shape and size of the fastening joint of the first fastener, and the guide groove is respectively arranged between the two limit grooves of the limit groove pair, and the guide groove has a bottom wall, wherein the bottom wall of the guide groove has two guide ends, wherein a part of the binding portion of the binding member is wrapped around the main body of the first fastener, so that the binding portion of the binding member is tightly fitted on the bottom wall of the guide groove.

2. The fixing assembly according to claim 1, characterized in that: A group of second fasteners are included, wherein each of the second fasteners includes a fastening screw and a fastening nut suitable for being threaded onto the fastening screw, wherein the threaded end of the fastening screw is configured to be able to pass through the through hole of the fastening joint of the first fastener, and allows the user to adjust the distance between the two first fasteners respectively arranged at the fixed ends of the tie by adjusting the fastening nut threaded thereon.

3. The fixing assembly according to claim 1, characterized in that: The width of the guide groove is set to be the same as the width of the tie portion of the tie member.

4. The fixing assembly according to claim 2, characterized in that: The width of the guide groove is set to be the same as the width of the tie portion of the tie member.

5. The fixing assembly according to claim 1, characterized in that: The guide end forms an arc-shaped guide surface extending from the inside to the outside.

6. The fixing assembly according to claim 2, characterized in that: The guide end forms an arc-shaped guide surface extending from the inside to the outside.

7. The fixing assembly according to any one of claims 1 to 6, characterized in that: The length of the main body of the first fastener is set to be not less than the width of the fixed end of the tie member.

8. The fixing assembly according to any one of claims 1 to 6, characterized in that: The width of the tie portion of the tie piece is set to be no greater than the width of the fixed end.

9. The fixing assembly according to any one of claims 1 to 6, characterized in that: The guide grooves are arranged parallel to each other, and there is a preset distance between every two adjacent guide grooves.

10. The fixing assembly according to claim 9, characterized in that: The preset distances between the guide grooves are the same.

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