A copper bar integrated structure for a hydrogen fuel cell and a hydrogen fuel cell

Abstract

The utility model discloses a copper bar integrated structure and hydrogen fuel cell for hydrogen fuel cell relates to hydrogen fuel cell technical field, including direct connection copper bar assembly, with the second copper bar connection of direct connection copper bar assembly connection, with the first copper bar connection of second copper bar connection, first copper bar fixed that at least two first copper bar fixeds of setting up on first copper bar connection is fixed in the package machine shell, first copper bar connection and second copper bar connection horizontal transverse arrangement, first copper bar connection and / or second copper bar connection are the soft copper bar of the lateral assembly size tolerance of being able to adjust, direct connection copper bar assembly vertical arrangement is set up with the adjustment hole of being able to adjust vertical assembly size tolerance and deviation on direct connection copper bar assembly. The utility model discloses soft copper bar, absorbs and compensates the size change caused by the thermal expansion and cold shrink of electric pile core and other factors.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen fuel cell technology, and more specifically to a copper busbar integrated structure for hydrogen fuel cells and the field of hydrogen fuel cell technology. Background Technology

[0002] The copper busbar is one of the important components in the integrated structure of a fuel cell system. Its function is to transfer the current collected by the current collector to the outside of the fuel cell system and connect it to the DC (direct current converter). The copper busbar is required to have excellent pressure resistance, insulation performance and corrosion resistance.

[0003] The assembly process of copper busbars is demanding, but there are many parts and transitions involved, as well as dimensional and assembly tolerances. As a result, assembly is often not smooth and may even require multiple disassembly and reassembly of the copper busbars.

[0004] During operation, the fuel cell stack is deformed due to factors such as thermal expansion and contraction of the stack core, and flexible connections are needed to absorb and compensate for the deformation.

[0005] The copper busbar assembly involves many parts and complex steps, eliminating the risks of repeated disassembly and assembly, and greatly improving product assembly efficiency and reliability. Utility Model Content

[0006] The purpose of this utility model is to solve the above-mentioned technical problems by providing a copper busbar integrated structure for hydrogen fuel cells and a hydrogen fuel cell.

[0007] To achieve the above objectives, this utility model specifically adopts the following technical solution: The first aspect of this utility model provides a copper busbar integrated structure for a hydrogen fuel cell, including a direct-connect copper busbar assembly, a second copper busbar connection connected to the direct-connect copper busbar assembly, and a first copper busbar connection connected to the second copper busbar connection, wherein at least two first copper busbar fixations fixed to the encapsulation housing are provided on the first copper busbar connection. The first copper busbar connection and the second copper busbar connection are arranged horizontally and laterally. Both the first copper busbar connection and / or the second copper busbar connection are soft copper busbars that can adjust the lateral assembly dimension tolerance. The direct-connect copper busbar assembly is arranged vertically, and the direct-connect copper busbar assembly is provided with adjustment holes that can adjust the vertical assembly dimensional tolerances and deviations.

[0008] Specifically, the first and second copper busbar connections utilize flexible copper busbars, allowing for adjustment of dimensional tolerances during lateral assembly. Vertical adjustment holes in the copper busbars allow for adjustment of dimensional tolerances and deviations during longitudinal assembly. The use of flexible copper busbars absorbs and compensates for dimensional changes caused by factors such as thermal expansion and contraction of the fuel cell stack core.

[0009] In one embodiment, the direct-connect copper busbar assembly includes a negative connection copper busbar, a positive connection copper busbar, an insulating support, and an L-shaped connection copper busbar; the negative connection copper busbar and the positive connection copper busbar are vertically arranged on the insulating support, the longitudinal side of the L-shaped connection copper busbar extends into the bottom of the insulating support and communicates with the positive connection copper busbar, and a locking hole is provided on the transverse side of the L-shaped connection copper busbar; (the positive connection copper busbar and the L-shaped connection copper busbar can be formed by bending a single copper busbar, or the positive connection copper busbar and the L-shaped connection copper busbar can be welded together).

[0010] The second copper busbar is located below the longitudinal edge of the L-shaped connecting copper busbar. One end of the second copper busbar is connected to the negative terminal connecting copper busbar, and the other end is connected to the first copper busbar by a screw.

[0011] In one embodiment, the negative electrode connecting copper busbar, the positive electrode connecting copper busbar, the insulating support, and the top plate of the hydrogen fuel cell are integrally formed by aluminum-plastic casting.

[0012] Specifically, the negative electrode connecting copper busbar, positive electrode connecting copper busbar, insulation support, and top plate are molded together as a single aluminum-plastic composite, saving the time of installing each part separately, improving production efficiency, and achieving the goals of improving integration, assembly efficiency, and reliability. The overall consistency is good, and it is also more aesthetically pleasing.

[0013] In one embodiment, the positive and negative copper busbars are arranged side by side on an insulating support, and the positive and negative copper busbars are located on the same plane.

[0014] The adjustment holes are vertically shaped holes set on the positive and negative copper busbars respectively.

[0015] The L-shaped connecting copper busbar has at least two threaded locking holes at the end of its lateral side. The L-shaped connecting copper busbar is locked onto the fuel cell stack through the threaded locking holes.

[0016] The L-shaped connecting copper busbar has an upward-protruding, adjustable flexible copper busbar at the middle of its horizontal side.

[0017] The second aspect of this invention provides a hydrogen fuel cell, including a copper busbar integrated structure for a hydrogen fuel cell as described in Example 2.

[0018] It also includes a packaging housing, a top plate set on top of the packaging housing, a fuel cell stack set inside the packaging housing, and the direct connection copper busbar assembly, the first copper busbar connection and the second copper busbar connection are all set above the fuel cell stack. The direct-connect copper busbar assembly is fastened to the top of the fuel cell stack with screws.

[0019] The top plate is provided with strip-shaped holes that allow the negative terminal copper busbar, the positive terminal copper busbar, and the insulating support to pass through; The top plate is also equipped with first and second copper busbar mounting holes for easy installation of screws.

[0020] The installation steps for a hydrogen fuel cell are as follows: S1. Process and produce negative electrode connection copper busbars and positive electrode connection copper busbars according to requirements; S2, the negative electrode connecting copper busbar, the positive electrode connecting copper busbar, the insulating support and the top plate are integrally cast and molded together using aluminum-plastic composite; Alternatively, the negative and positive copper busbars and insulating supports can be cast together first, and then molded together with the top plate using an integrated aluminum-plastic casting process. S3. Then assemble the second copper busbar and fix it to the top plate, and then assemble the third copper busbar and fix it. S4. Then assemble the second copper busbar and connect it to the direct-connect copper busbar assembly; S5. Install the first copper busbar connection, and at the same time install the first copper busbar connection and fix it to the packaging machine housing; S6. The copper busbar is integrated onto the fuel cell stack using screws through the first copper busbar mounting hole and the second copper busbar mounting hole.

[0021] In addition, during the injection molding of the copper busbars, the vertical copper busbars are wrapped, increasing their strength. Limiting the movement of the copper busbars reduces vibration amplitude during product transportation, thus protecting the product.

[0022] The beneficial effects of this utility model are as follows: 1. The first and / or second copper busbar connections of this utility model use soft copper busbars, which can adjust the dimensional tolerances in the horizontal assembly; the copper busbars have vertical adjustment holes, which can adjust the dimensional tolerances and deviations in the longitudinal assembly. The use of soft copper busbars absorbs and compensates for dimensional changes caused by factors such as thermal expansion and contraction of the fuel cell core.

[0023] 2. Through high integration and the design of soft copper busbars and waist-shaped hole structures, the assembly efficiency and reliability of the product are greatly improved.

[0024] 3. The negative electrode connecting copper busbar, positive electrode connecting copper busbar, insulation support and top plate are cast together in one piece using aluminum-plastic molding, which saves the time of installing each part separately, improves production efficiency, and ensures good product consistency, thereby achieving the goal of improving integration, assembly efficiency and reliability. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a hydrogen fuel cell with an integrated copper busbar structure for use in hydrogen fuel cells. Figure 2 This is a structural schematic diagram of the direct-connect copper busbar assembly; Figure 3 This is a structural schematic diagram of the top slab; Reference numerals: 1. Encapsulation housing; 2. Fuel cell stack; 3. First copper busbar fixing; 4. First copper busbar connection; 5. Second copper busbar fixing; 6. Direct-connect copper busbar assembly; 7. Second copper busbar connection; 8. Third copper busbar fixing; 9. Screw; 10. Top plate; 11. First copper busbar mounting hole; 12. Second copper busbar mounting hole; 601. Negative electrode connection copper busbar; 602. Positive electrode connection copper busbar; 603. Insulation support. Detailed Implementation

[0027] To make the technical problems, technical solutions, and technical effects of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Example 1 This embodiment provides a copper busbar integrated structure for hydrogen fuel cells, including a direct copper busbar assembly 6, a second copper busbar connection 7 connected to the direct copper busbar assembly 6, and a first copper busbar connection 4 connected to the second copper busbar connection 7. The first copper busbar connection 4 is provided with at least two first copper busbar fixings 3 fixed to the encapsulation housing. The first copper busbar connection 4 and the second copper busbar connection 7 are arranged horizontally and laterally. The first copper busbar connection 4 and / or the second copper busbar connection 7 are soft copper busbars that can adjust the lateral assembly dimension tolerance. The direct-connect copper busbar assembly 6 is arranged vertically, and the direct-connect copper busbar assembly 6 is provided with adjustment holes that can adjust the vertical assembly dimension tolerances and deviations.

[0032] Specifically, the first and / or second copper busbar connections use flexible copper busbars, which allows for adjustment of dimensional tolerances in the lateral assembly; the copper busbars have vertical adjustment holes, allowing for adjustment of dimensional tolerances and deviations in the longitudinal assembly. The use of flexible copper busbars absorbs and compensates for dimensional changes caused by factors such as thermal expansion and contraction of the fuel cell stack core.

[0033] Example 2 This embodiment provides a copper busbar integrated structure for hydrogen fuel cells, including a direct copper busbar assembly 6, a second copper busbar connection 7 connected to the direct copper busbar assembly 6, and a first copper busbar connection 4 connected to the second copper busbar connection 7. The first copper busbar connection 4 is provided with at least two first copper busbar fixations fixed to the encapsulation housing. The first copper busbar connection 4 and the second copper busbar connection 7 are arranged horizontally. Both the first copper busbar connection 4 and the second copper busbar connection 7 are soft copper busbars that can adjust the lateral assembly dimension tolerance. The direct-connect copper busbar assembly 6 is arranged vertically, and the direct-connect copper busbar assembly 6 is provided with adjustment holes that can adjust the vertical assembly dimension tolerances and deviations.

[0034] The direct-connect copper busbar assembly 6 includes a negative connection copper busbar 601, a positive connection copper busbar 602, an insulating support 603, and an L-shaped connection copper busbar; the negative connection copper busbar 601 and the positive connection copper busbar 602 are vertically arranged on the insulating support 603, the longitudinal side of the L-shaped connection copper busbar extends into the bottom of the insulating support 603 and is connected to the positive connection copper busbar 602, and a locking hole is provided on the transverse side of the L-shaped connection copper busbar; The second copper busbar connection 7 is located below the longitudinal edge of the L-shaped connecting copper busbar. One end of the second copper busbar connection 7 is connected to the negative terminal connecting copper busbar 601, and the other end is connected to the first copper busbar connection 4 by a screw.

[0035] Example 3 This embodiment is a further optimization based on embodiment 2, specifically: The positive electrode connecting copper busbar 601, the positive electrode connecting copper busbar 602, the insulating support 603, and the top plate 10 of the hydrogen fuel cell are integrally formed by aluminum-plastic casting.

[0036] Specifically, the negative electrode connecting copper busbar 601, the positive electrode connecting copper busbar 602, the insulating support 603, and the top plate 10 are integrally cast and molded together using aluminum-plastic composite, saving the time of installing each part separately, improving production efficiency, and achieving the goal of improving integration, assembly efficiency, and reliability. The overall consistency is good, and it is also more aesthetically pleasing.

[0037] Example 4 This embodiment is a further optimization based on embodiment 2, specifically: The positive terminal connecting copper busbar 602 and the negative terminal connecting copper busbar 601 are arranged side by side on the insulating support 603, and the positive terminal connecting copper busbar 602 and the negative terminal connecting copper busbar 601 are located on the same plane.

[0038] The adjustment holes are vertically shaped holes set on the positive terminal connecting copper busbar 602 and the negative terminal connecting copper busbar 601, respectively.

[0039] Example 5 This embodiment is a further optimization based on embodiment 2, specifically: At least two threaded locking holes are provided at the end of the lateral side of the L-shaped connecting copper busbar, and the L-shaped connecting copper busbar is locked to the fuel cell stack 2 through the threaded locking holes.

[0040] The L-shaped connecting copper busbar has an upward-protruding, adjustable flexible copper busbar at the middle of its horizontal side.

[0041] Example 6 This embodiment provides a hydrogen fuel cell, including the copper busbar integrated structure for hydrogen fuel cells disclosed in Embodiment 5. It also includes a housing 1, a top plate 10 disposed on top of the housing 1, and a fuel cell stack 2 disposed inside the housing 1. The direct-connect copper busbar assembly 6, the first copper busbar connection 4, and the second copper busbar connection 7 are all disposed above the fuel cell stack 2. The direct-connect copper busbar assembly 6 is locked to the top of the fuel cell stack 2 by screws 9.

[0042] The top plate 10 is provided with a strip-shaped hole that allows the negative terminal connection copper busbar 601, the positive terminal connection copper busbar 602 and the insulating support 603 to pass through; The top plate 10 is also provided with a first copper busbar mounting hole 11 and a second copper busbar mounting hole 12 for easy installation of screws 9.

[0043] The installation steps for a hydrogen fuel cell are as follows: S1. Process and produce the negative electrode connection copper busbar 601 and the positive electrode connection copper busbar 602 according to requirements; S2, negative electrode connecting copper busbar 601, positive electrode connecting copper busbar 602, insulating support 603 and top plate 10 are integrally cast and molded together using aluminum-plastic composite; Alternatively, the negative terminal connecting copper busbar 601, the positive terminal connecting copper busbar 602, and the insulating support 603 can be cast together first, and then cast together with the top plate 10 using an integrated aluminum-plastic molding process. S3. Then, install the second copper busbar 5 onto the top plate 10, and then install the third copper busbar 8. S4. Then assemble the second copper busbar connection 7 onto the direct copper busbar assembly 6; S5. Install the first copper busbar connection 4, and at the same time install the first copper busbar 3 to fix the first copper busbar connection 4 to the packaging housing 1. S6. The copper busbar is assembled onto the fuel cell stack 2 using screws 9 through the first copper busbar mounting hole 11 and the second copper busbar mounting hole 12.

[0044] In addition, during the injection molding of the copper busbars, the vertical copper busbars are wrapped, increasing their strength. Limiting the movement of the copper busbars reduces vibration amplitude during product transportation, thus protecting the product.

Claims

1. A copper busbar integrated structure for hydrogen fuel cells, characterized in that, It includes a direct-connect copper busbar assembly (6), a second copper busbar connection (7) connected to the direct-connect copper busbar assembly (6), and a first copper busbar connection (4) connected to the second copper busbar connection (7). The first copper busbar connection (4) is provided with at least two first copper busbar fixations (3) fixed to the packaging housing. The first copper busbar connection (4) and the second copper busbar connection (7) are arranged horizontally and laterally. The first copper busbar connection (4) and / or the second copper busbar connection (7) are both soft copper busbars that can adjust the lateral assembly dimension tolerance. The direct-connect copper busbar assembly (6) is arranged vertically, and the direct-connect copper busbar assembly (6) is provided with adjustment holes that can adjust the vertical assembly dimension tolerance and deviation.

2. The copper busbar integrated structure for hydrogen fuel cells according to claim 1, characterized in that, The direct-connect copper busbar assembly (6) includes a negative connection copper busbar (601), a positive connection copper busbar (602), an insulating support (603), and an L-shaped connection copper busbar; the negative connection copper busbar (601) and the positive connection copper busbar (602) are vertically arranged on the insulating support (603), the longitudinal side of the L-shaped connection copper busbar extends into the bottom of the insulating support (603) and communicates with the positive connection copper busbar (602), and a locking hole is provided on the transverse side of the L-shaped connection copper busbar; The second copper busbar connection (7) is located below the longitudinal edge of the L-shaped connecting copper busbar. One end of the second copper busbar connection (7) is connected to the negative electrode connecting copper busbar (601), and the other end is connected to the first copper busbar connection (4) by a screw.

3. The copper busbar integrated structure for hydrogen fuel cells according to claim 2, characterized in that, The negative electrode connecting copper busbar (601), the positive electrode connecting copper busbar (602), the insulating support (603), and the top plate (10) of the hydrogen fuel cell are integrally formed by aluminum-plastic casting.

4. The copper busbar integrated structure for hydrogen fuel cells according to claim 2, characterized in that, The positive electrode connecting copper busbar (602) and the negative electrode connecting copper busbar (601) are arranged side by side on the insulating support (603), and the positive electrode connecting copper busbar (602) and the negative electrode connecting copper busbar (601) are located on the same plane.

5. The copper busbar integrated structure for hydrogen fuel cells according to claim 2, characterized in that, The adjustment hole is a waist-shaped hole in the vertical direction, which is respectively set on the positive terminal connecting copper busbar (602) and the negative terminal connecting copper busbar (601).

6. The copper busbar integrated structure for hydrogen fuel cells according to claim 2, characterized in that, The L-shaped connecting copper busbar has at least two threaded locking holes at the end of its lateral side, and the L-shaped connecting copper busbar is locked onto the fuel cell stack (2) through the threaded locking holes.

7. The copper busbar integrated structure for hydrogen fuel cells according to claim 5, characterized in that, The L-shaped connecting copper busbar has an upwardly protruding, adjustable flexible copper busbar at the middle of its horizontal side.

8. A hydrogen fuel cell, characterized in that, The invention includes a copper busbar integrated structure for a hydrogen fuel cell as described in any one of claims 1 to 7.

9. A hydrogen fuel cell according to claim 8, characterized in that, Includes a packaging housing (1) and a top plate (10) disposed on the top of the packaging housing (1). A fuel cell stack (2) is disposed inside the packaging housing (1). The direct-connect copper busbar assembly (6), the first copper busbar connection (4) and the second copper busbar connection (7) are all disposed above the fuel cell stack (2). The direct-connect copper busbar assembly (6) is secured to the top of the fuel cell stack (2) by screws (9).

10. A hydrogen fuel cell according to claim 9, characterized in that, The top plate (10) is provided with a strip-shaped hole that allows the negative electrode connecting copper busbar (601), the positive electrode connecting copper busbar (602) and the insulating support (603) to pass through; The top plate (10) is also provided with a first copper busbar mounting hole (11) and a second copper busbar mounting hole (12) for easy installation of the screw (9).

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