Sealing element and galvanic pile assembly with same

Abstract

The utility model provides a sealing element and a galvanic pile assembly with the same, the sealing element is arranged in a mounting hole on a galvanic pile shell, the sealing element is provided with a through hole, the through hole is used for accommodating a copper bar, the sealing element is made of an elastic material, the sealing element can seal a gap between the copper bar and the mounting hole, and the periphery of the sealing element is provided with a limiting structure. And the limiting structure can limit the displacement of the sealing element relative to the galvanic pile shell in the thickness direction of the galvanic pile shell. By means of the technical scheme, the problem that in the prior art, sealing of an electric pile assembly is tedious can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, and particularly to a sealing member and a stack assembly having the same. Background Art

[0002] At present, in the field of fuel cells, copper bars are usually used in the stack assembly of fuel cells to transmit current inside and outside the fuel cell. The copper bar needs to pass through the stack housing and be connected to the outside. In order to ensure the waterproof and dustproof performance of the stack, a sealing ring is usually arranged between the copper bar and the stack housing to seal the stack assembly.

[0003] In the prior art, a sealing groove is usually reserved on the stack housing, the copper bar passes through the sealing groove, then a sealing ring is installed between the copper bar and the sealing groove, and finally a sealing cover is installed on the cover plate of the stack assembly and fastened by bolts to achieve sealing. However, this sealing solution has a low integration level, requires more parts, and the process is relatively cumbersome, which is not conducive to reducing production costs and improving production efficiency. Summary of the Utility Model

[0004] The utility model provides a sealing member and a stack assembly having the same to solve the problem that the sealing of the stack assembly in the prior art is relatively cumbersome.

[0005] According to one aspect of the utility model, a sealing member is provided. The sealing member is arranged in an installation hole on a stack housing. The sealing member has a through perforation for passing a copper bar. The sealing member is made of an elastic material and can seal the gap between the copper bar and the installation hole. The outer periphery of the sealing member has a limiting structure, and the limiting structure can limit the displacement of the sealing member relative to the stack housing in the thickness direction of the stack housing.

[0006] Further, the limiting structure includes a limiting groove which is arranged around the side wall of the sealing member, and a part of the stack housing is embedded in the limiting groove.

[0007] Further, the sealing member includes a main body and a protruding portion. The perforation is arranged on the main body. There are two protruding portions, and the two protruding portions are respectively located at opposite ends of the main body along the extending direction of the perforation. The two protruding portions and the side wall of the main body cooperate to form a limiting groove.

[0008] Further, the outer peripheral edge of the protruding portion has a first guiding surface to guide the installation of the sealing member, and the outer peripheral dimension of the protruding portion gradually increases along the direction from the protruding portion to the main body.

[0009] Further, along the extending direction of the sealing member, the outer peripheral dimensions of the two protruding portions are not equal.

[0010] Further, the protrusion includes a first protrusion and a second protrusion. The first protrusion is located on the side of the stack housing away from the interior of the stack, and the second protrusion is located on the side of the stack housing close to the interior of the stack. Along the extending direction of the seal, the outer peripheral dimension of the first protrusion is smaller than that of the second protrusion.

[0011] Further, the thicknesses of the two protrusions are not equal.

[0012] Further, second guiding surfaces are provided at two ports where the perforations are oppositely arranged to guide the installation of the copper busbar. The inner diameter of the perforation at the second guiding surface gradually increases in the direction from the end of the perforation to the middle of the perforation.

[0013] According to another aspect of the present utility model, a stack assembly is provided. The stack assembly includes a stack housing, a stack core, and a copper busbar. An installation hole is provided on the stack housing, and the copper busbar is inserted through the installation hole. A seal is provided between the copper busbar and the installation hole, and the seal is the above-mentioned seal.

[0014] Further, the end of the copper busbar for passing through the installation hole has a third guiding surface to guide the installation of the copper busbar, and the outer peripheral dimension of the end of the copper busbar with the third guiding surface gradually increases in the direction towards the stack core.

[0015] Applying the technical solution of the present utility model, the copper busbar can pass through the installation hole to realize the connection between the inside and the outside of the stack assembly. A seal is provided between the copper busbar and the installation hole to block the gap between the copper busbar and the installation hole, which can ensure the sealing performance of the stack assembly and achieve dust and water protection for the stack assembly. Moreover, the limiting structure on the outer periphery of the seal can realize the limitation of the seal and the stack housing, prevent the seal from falling off, and ensure the stable installation of the seal. In this application, the seal is installed through its own limiting structure. Compared with the complex fixing structures in the prior art, it can reduce the parts usage, lower the manufacturing cost, and at the same time reduce the assembly process. It only needs to fix the seal on the stack housing, thus simplifying the assembly process and improving the overall production efficiency of the fuel cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0017] Figure 1 shows a schematic structural diagram of the seal provided by the present utility model;

[0018] Figure 2 shows a partial structural diagram of the stack housing of the stack assembly provided by the present utility model;

[0019] Figure 3 The figure shows a schematic structural diagram of the stack housing and the seal of the stack assembly provided by the present utility model after assembly;

[0020] Figure 4 The figure shows a schematic structural diagram of the cooperation between the copper busbar and the seal of the stack assembly provided by the present utility model.

[0021] Among them, the above-mentioned drawings include the following reference numerals:

[0022] 10, perforation;

[0023] 11, body;

[0024] 12, protrusion; 121, first protrusion; 122, second protrusion;

[0025] 20, limiting groove;

[0026] 30, first guiding surface;

[0027] 40, second guiding surface;

[0028] 100, stack housing;

[0029] 110, mounting hole;

[0030] 200, copper busbar. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way restrictive of the present utility model and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0032] As Figures 1 to 4 shown, an embodiment of the present utility model provides a seal. The seal is arranged in the mounting hole 110 on the stack housing 100. The seal has a through perforation 10 for passing through the copper busbar 200. The seal is made of an elastic material. The seal can seal the gap between the copper busbar 200 and the mounting hole 110. The outer periphery of the seal has a limiting structure, and the limiting structure can limit the displacement of the seal relative to the stack housing 100 in the thickness direction of the stack housing 100.

[0033] Applying the technical solution of the present utility model, the copper busbar 200 can pass through the mounting hole 110 to realize the connection between the inside and the outside of the stack assembly. A seal is provided between the copper busbar 200 and the mounting hole 110 to block the gap between the copper busbar 200 and the mounting hole 110, which can ensure the sealing performance of the stack assembly and achieve dust and water protection for the stack assembly. Moreover, the limiting structure on the outer periphery of the seal can realize the limitation of the seal and the stack housing 100, prevent the seal from falling off, and ensure the stable installation of the seal. In this application, the seal is installed through its own limiting structure. Compared with the complex fixing structures used in the prior art, it can reduce the number of parts, lower the manufacturing cost, and at the same time reduce the assembly process. It only needs to fix the seal on the stack housing 100, thus simplifying the assembly process and improving the overall production efficiency of the fuel cell.

[0034] Specifically in this application, the seal is made of an elastic material. With such a setting, after the copper busbar 200 is inserted into the through-hole 10, the copper busbar 200 and the mounting hole 110 can jointly squeeze the seal, causing the seal to undergo a certain elastic deformation to achieve the sealing of the gap between the copper busbar 200 and the mounting hole 110.

[0035] Preferably, the elastic material can be a rubber material, such as nitrile rubber or ethylene propylene diene monomer rubber, etc. While achieving the sealing effect of the stack assembly, it can also ensure the insulation performance of the stack assembly.

[0036] Specifically in this application, after the copper busbar 200 is inserted, the seal is in an interference fit with both the copper busbar 200 and the mounting hole 110 to ensure the sealing performance of the seal.

[0037] In the embodiment of this application, the limiting structure includes a limiting groove 20. The limiting groove 20 is arranged around the side wall of the seal, and a part of the stack housing 100 is embedded in the limiting groove 20. Through the above setting, the side walls at both ends of the limiting groove 20 can limit the displacement of the seal relative to the stack housing 100 in the thickness direction of the seal, preventing the seal from falling off.

[0038] Specifically, the seal includes a body 11 and a protruding portion 12. The through-hole 10 is arranged on the body 11. There are two protruding portions 12, and the two protruding portions 12 are respectively arranged at both ends of the body 11 opposite to each other along the extending direction of the through-hole 10. The two protruding portions 12 and the side wall of the body 11 cooperate to form the limiting groove 20. Through the above setting, the two protruding portions 12 can clamp the stack housing 100 in the thickness direction of the seal to realize the installation of the seal.

[0039] Furthermore, the two protruding portions 12 are in abutting fit with the stack housing 100 to further ensure the sealing performance of the seal.

[0040] Specifically, the end faces of the two protrusions 12 in contact and cooperation with the stack housing 100 are flat surfaces to ensure the sealing area between the protrusions 12 and the stack housing 100.

[0041] When installing the seal provided in this application, the seal can first be abutted against the mounting hole 110, and the seal is pressed to cause elastic deformation of one of the protrusions 12 on the side in contact with the stack housing 100, so that the protrusion 12 can pass through the mounting hole 110, and the stack housing 100 can enter the limiting groove 20 to complete the installation of the seal.

[0042] In this application, the outer peripheral edge of the protrusion 12 has a first guiding surface 30 to guide the installation of the seal. The outer peripheral dimension of the protrusion 12 gradually increases along the direction from the protrusion 12 to the body 11. Through the above settings, the first guiding surface 30 can play a guiding role in the installation of the seal and facilitate the installation of the seal.

[0043] Specifically, the first guiding surface 30 can be a flat surface or an arc surface.

[0044] Specifically, the outer peripheral edges of the two protrusions 12 can be provided with the first guiding surface 30 to facilitate the installation of the seal from multiple directions.

[0045] In some feasible embodiments of this application, along the extension direction of the seal, the outer peripheral dimensions of the two protrusions 12 are not equal. Through the above settings, one of the protrusions 12 with a smaller outer peripheral dimension is more likely to pass through the mounting hole 110 after elastic deformation, which facilitates the installation of the seal. At the same time, it can also reduce the material consumption of the seal, thereby reducing the manufacturing cost.

[0046] Specifically, the protrusion 12 includes a first protrusion 121 and a second protrusion 122. The first protrusion 121 is located on the side of the stack housing 100 away from the inside of the stack, and the second protrusion 122 is located on the side of the stack housing 100 close to the inside of the stack. Along the extension direction of the seal, the outer peripheral dimension of the first protrusion 121 is smaller than that of the second protrusion 122. Through the above settings, the first protrusion 121 and the second protrusion 122 can respectively limit the displacement of the seal in the direction towards the inside of the stack assembly and away from the inside of the stack assembly, preventing the seal from falling off. At the same time, the outer peripheral dimension of the first protrusion 121 is smaller than that of the second protrusion 122, which facilitates the installation of the seal. Specifically, during the installation of the seal, on the side of the stack housing 100 close to the inside of the stack assembly, the end face of the first protrusion 121 with a smaller outer peripheral dimension can be abutted against the stack housing 100, and then the seal is squeezed to cause elastic deformation of the first protrusion 121 so that the first protrusion 121 can pass through the mounting hole 110 to complete the installation of the seal, improving the convenience of seal installation.

[0047] In some other feasible embodiments of the present application, the thicknesses of the two protrusions 12 are not equal. Specifically, the thickness of one of the protrusions 12 can be less than that of the other protrusion 12. With such a setting, the protrusion 12 with a smaller thickness is more likely to undergo elastic deformation. During the installation process of the seal, the protrusion 12 with a smaller thickness can pass through the mounting hole 110, facilitating the installation of the seal. Moreover, such a setting can also reduce the material consumption of the seal, thereby reducing the manufacturing cost. Specifically, the thickness of the first protrusion 121 can be set to be less than the thickness of the second protrusion 122, further improving the convenience of seal installation.

[0048] Furthermore, at two opposite ports of the perforation 10, there are second guiding surfaces 40 for guiding the installation of the copper bar 200. The inner diameter of the perforation 10 at the second guiding surfaces 40 gradually increases in the direction from the end of the perforation 10 towards the middle of the perforation 10. Since during the assembly process of the fuel cell stack assembly, it is necessary to first fix the seal to the fuel cell stack housing 100 and then insert the copper bar 200 into the perforation 10. By providing the second guiding surfaces 40 at two opposite ports of the perforation 10, the insertion action of the copper bar 200 can be guided, facilitating the alignment and insertion of the copper bar 200 through the perforation 10.

[0049] Similarly, the second guiding surface 40 can also be a plane or a curved surface.

[0050] According to an embodiment of the present invention, there is also provided a fuel cell stack assembly, which includes a fuel cell stack housing 100, a stack core, and a copper bar 200. The fuel cell stack housing 100 is provided with a mounting hole 110, the copper bar 200 is inserted into the mounting hole 110, and a seal is provided between the copper bar 200 and the mounting hole 110, and the seal is the above-mentioned seal.

[0051] By using the seal provided in the present application, while ensuring the sealing performance of the fuel cell stack assembly, the seal can be limited and installed with the fuel cell stack housing 100 through its own limiting structure, and the stability of seal installation can also be ensured. Moreover, by applying the seal of the present application, compared with the existing fuel cell stack assembly, the overall number of parts of the fuel cell stack assembly can be reduced, the manufacturing cost can be lowered, and at the same time, the assembly process can be reduced, thereby improving the overall production efficiency of the fuel cell.

[0052] It should be noted that in the present application Figures 2 to 4 The shown fuel cell stack housing 100 is a partial housing of the fuel cell stack assembly, and the fuel cell stack housing 100 can be the top cover, side cover, or bottom cover of the fuel cell stack housing.

[0053] Further, the end of the copper busbar 200 for passing through the mounting hole 110 has a third guiding surface for guiding the installation of the copper busbar 200, and the outer peripheral dimension of the end of the copper busbar 200 with the third guiding surface gradually increases in the direction towards the core. Through the above arrangement, the third guiding inclined surface provided at the end of the copper busbar 200 can guide the threading action of the copper busbar 200, facilitating the alignment and passing of the copper busbar 200 through the through-hole 10.

[0054] Similarly, the third guiding surface can also be a flat surface or an arc surface.

[0055] Preferably, the third guiding surface can be set as an arc surface. By setting the third guiding surface as an arc surface, the probability of the outer peripheral edge of the copper busbar 200 scratching the seal during the threading process can be reduced, preventing scratches from appearing between the copper busbar 200 and the seal, and further ensuring the sealing performance of the seal.

[0056] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or their combinations.

[0057] Unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions, and values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters denote similar items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0058] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present utility model; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0059] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper...", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation other than the orientation described in the drawings for the device. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0060] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without separate declaration, the above words have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present utility model.

[0061] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A sealing member, characterized in that: The sealing member is arranged in a mounting hole (110) on a battery stack shell (100), the sealing member has a through hole (10), the through hole (10) is used to accommodate a copper busbar (200), the sealing member is made of an elastic material, the sealing member can seal a gap between the copper busbar (200) and the mounting hole (110), the outer periphery of the sealing member has a limiting structure, the limiting structure can limit the displacement of the sealing member relative to the battery stack shell (100) in the thickness direction of the battery stack shell (100).

2. The seal according to claim 1, characterized in that The limiting structure comprises a limiting groove (20), the limiting groove (20) being arranged on the side wall of the sealing component, and a part of the battery stack housing (100) being embedded in the limiting groove (20).

3. The seal according to claim 2, characterized in that The sealing component comprises a main body (11) and a protrusion (12); the through hole (10) is arranged on the main body (11); two protrusions (12) are arranged; the two protrusions (12) are respectively located at two opposite ends of the main body (11) along the extension direction of the through hole (10); the two protrusions (12) cooperate with the side wall of the main body (11) to form the limiting groove (20).

4. The seal according to claim 3, characterized in that The outer periphery of the protrusion (12) has a first guide surface (30) to guide the installation of the sealing member, and the outer periphery size of the protrusion (12) gradually increases along the direction from the protrusion (12) to the body (11).

5. The seal according to claim 3, characterized in that Along the extending direction of the sealing element, the outer circumferential dimensions of the two protrusions (12) are unequal.

6. The seal according to claim 5, characterized in that The protrusion (12) comprises a first protrusion (121) and a second protrusion (122), wherein the first protrusion (121) is located on a side of the stack shell (100) away from the interior of the stack, and the second protrusion (122) is located on a side of the stack shell (100) close to the interior of the stack, and along the extension direction of the seal, the outer peripheral size of the first protrusion (121) is smaller than the outer peripheral size of the second protrusion (122).

7. The seal according to claim 3, characterized in that The thicknesses of the two protrusions (12) are unequal.

8. The seal according to claim 1, characterized in that The through hole (10) has a second guide surface (40) at two oppositely disposed ends to guide the installation of the copper busbar (200), and the inner diameter of the through hole (10) at the second guide surface (40) gradually increases from the end of the through hole (10) toward the middle of the through hole (10).

9. A battery stack assembly, characterized in that: The stack assembly comprises a stack shell (100), a stack core and a copper busbar (200); a mounting hole (110) is provided on the stack shell (100); the copper busbar (200) is inserted into the mounting hole (110); a seal is provided between the copper busbar (200) and the mounting hole (110); the seal is the seal described in any one of claims 1 to 8.

10. The battery stack assembly according to claim 9, characterized in that: The end of the copper bar (200) for passing through the installation hole (110) has a third guide surface to guide the installation of the copper bar (200), and the outer circumference of the end of the copper bar (200) having the third guide surface gradually increases in a direction toward the core.

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