CN220914283U

CN220914283U - Copper bar sealing structure of electric device, fuel cell stack and vehicle

Info

Publication number: CN220914283U
Application number: CN202322753998.XU
Authority: CN
Inventors: 戴斌; 原强
Original assignee: Shanghai Fuel Cell Vehicle Powertrain Co ltd
Current assignee: Shanghai Fuel Cell Vehicle Powertrain Co ltd
Priority date: 2023-10-13
Filing date: 2023-10-13
Publication date: 2024-05-07
Anticipated expiration: 2033-10-13

Abstract

The utility model provides an electric device copper bar sealing structure, a fuel cell stack and a vehicle, wherein the electric device copper bar sealing structure comprises a sealing piece and a pressing plate for fixing the sealing piece on an electric device shell; the sealing element is used for being sleeved on the part of the copper bar extending out of the electric device shell, the pressing plate is used for being connected with the electric device shell, an accommodating space is formed between the pressing plate and the electric device shell, the sealing element can be restrained in the accommodating space and extruded by the inner wall of the accommodating space, and the sealing element is abutted between the copper bar and the inner wall of the accommodating space. According to the copper bar sealing structure of the electric device, the sealing piece sleeved on the copper bar is enabled to be restrained in the accommodating space between the pressing plate and the electric device shell, when the pressing plate is connected with the electric device shell, the sealing piece can be extruded through the inner wall of the accommodating space, and the sealing piece is enabled to be abutted between the copper bar and the inner wall of the accommodating space, so that the gap between the electric device shell and the copper bar is sealed, and a good sealing effect is achieved.

Description

Copper bar sealing structure of electric device, fuel cell stack and vehicle

Technical Field

The utility model relates to the technical field of electrical devices, in particular to a copper bar sealing structure of an electrical device. Meanwhile, the utility model also relates to a fuel cell stack and a vehicle.

Background

In the prior art, through holes are arranged on the electric device shell, and copper bars penetrate through the through holes on the electric device shell to be used for realizing connection between the electric device and an external component. For example, copper bars on the fuel cell stack housing, sealing requirements are placed on the connection between the fuel cell stack housing and the copper bars, and sealing rings are typically sleeved on the copper bars. The sealing ring is tightly matched with the copper bar, and the sealing effect between the electric device shell and the copper bar is achieved by filling gaps between the copper bar and the inner wall of the through hole with the sealing ring. However, the sealing scheme is difficult to assemble, is unfavorable for improving the assembly efficiency, and has poor sealing effect.

Disclosure of utility model

In view of the above, the present utility model is directed to an electrical device copper bar sealing structure to improve the sealing effect between the electrical device housing and the copper bar.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

An electric device copper bar sealing structure is used for sealing a gap between an electric device shell and a copper bar penetrating out of the electric device shell, and comprises a sealing piece and a pressing plate for fixing the sealing piece on the electric device shell;

the sealing element is used for being sleeved on the part, extending out of the electric device shell, of the copper bar, the pressing plate is used for being connected with the electric device shell, an accommodating space is formed between the pressing plate and the electric device shell in a surrounding mode, and the sealing element can be restrained in the accommodating space, extruded by the inner wall of the accommodating space and abutted between the copper bar and the inner wall of the accommodating space.

Further, a first accommodating groove for accommodating the sealing element is formed in the electric device shell;

the first accommodating groove comprises a pressing portion, and the inner wall of the pressing portion is provided with a first conical surface, and the first conical surface presses the sealing piece and radially contracts the sealing piece to be abutted with the copper bar.

Further, a first matching surface is arranged at one end, close to the electric device shell, of the sealing element;

the first conical surface is extruded on the first matching surface, and the first matching surface is an inclined surface which is matched with the first conical surface.

Further, the first accommodating groove comprises a cylindrical portion connected with the pressing portion, and the sealing member is provided with a cylindrical portion matched with the cylindrical portion.

Further, a second accommodating groove is formed in the pressing plate, at least part of the side wall of the second accommodating groove is provided with a second conical surface, and the second conical surface presses the sealing piece and enables the sealing piece to radially shrink to be abutted against the copper bar.

Further, a second matching surface is arranged at one end, close to the pressing plate, of the sealing element;

The second conical surface is extruded on the second matching surface, and the second matching surface is an inclined surface which is matched with the second conical surface.

Further, the pressing plate is connected with the electric device shell through a screw pair in a screw connection mode.

Further, the thread pairs are arranged at intervals around the copper bars.

Compared with the prior art, the utility model has the following advantages:

According to the copper bar sealing structure of the electric device, the sealing piece sleeved on the copper bar is used, the sealing piece can be restrained in the accommodating space between the pressing plate and the electric device shell, when the pressing plate is connected with the electric device shell, the sealing piece can be extruded through the inner wall of the accommodating space, and the sealing piece is abutted between the copper bar and the inner wall of the accommodating space, so that the gap between the electric device shell and the copper bar is sealed, the installation is convenient, and the sealing effect is good.

In addition, the first conical surface that sets up on first holding tank and the last extrusion part can guide first holding tank to extrude the sealing member for the sealing member radially contracts and with the copper bar butt, does benefit to the extrusion effect that improves the sealing member, thereby does benefit to the sealing member and realizes better sealed effect. Through first mating surface and first conical surface direction cooperation, do benefit to further improve the effect of pressing of first conical surface to the sealing member, and then promote the sealed effect of sealing member. The cylindrical part arranged on the first accommodating groove is beneficial to improving the accommodating and positioning effect of the first accommodating groove on the bottom of the sealing element, and can also be abutted against the cylindrical part of the sealing element when the sealing element is extruded, so that the sealing effect of the sealing element and the electric device shell is improved.

In addition, the second holding groove and the second conical surface on the second holding groove can guide the second holding groove to extrude the sealing element, so that the extrusion effect of the sealing element is improved, the sealing element radially contracts and abuts against the copper bar, and the sealing element can achieve a good sealing effect. The second mating surface is matched with the second conical surface in a guiding way, so that the pressing effect of the second conical surface on the sealing element is further improved, and the sealing effect of the sealing element is further improved. The pressing plate is connected with the electric device shell through the screw pair in a screwed mode, so that the connection mode is simple, the connection effect is good, the operation is easy, and meanwhile, the sealing piece can be extruded. The multiple screw thread pairs are matched with each other, so that the connection effect is good, and the pressing force on the sealing element is stable.

In addition, another object of the present utility model is to provide a fuel cell stack in which the copper bar sealing structure of the electric device as described above is provided.

The utility model also relates to a vehicle in which a fuel cell stack as described above is arranged.

The fuel cell stack and the vehicle have the same beneficial effects as the copper bar sealing structure of the electric device, and are not repeated here.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

Fig. 1 is a schematic structural diagram of a copper bar sealing structure of an electrical device in an initial state according to an embodiment of the present utility model;

Fig. 2 is a schematic view of the internal structure of a copper bar sealing structure of an electrical device in an initial state according to an embodiment of the present utility model;

Fig. 3 is a schematic structural diagram of a copper bar sealing structure of an electrical device in a connection state according to an embodiment of the present utility model;

Fig. 4 is a schematic structural diagram of the copper bar sealing structure of the electrical device in a connection state according to the first embodiment of the present utility model;

FIG. 5 is a schematic view of a seal according to an embodiment of the utility model;

fig. 6 is a schematic partial structure of an electrical device housing according to an embodiment of the utility model;

Fig. 7 is a schematic structural diagram of a pressing plate according to an embodiment of the utility model.

Reference numerals illustrate:

1. An electric device housing; 2. a copper bar; 3. a seal; 4. a pressing plate; 5. a bolt;

100. A stack housing;

101. a boss; 102. a threaded blind hole; 103. a first accommodation groove; 104. a first conical surface;

301. A first mating surface; 302. a second mating surface; 303. a columnar portion;

401. a second accommodation groove; 402. and a second conical surface.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that, if terms indicating an azimuth or a positional relationship such as "upper", "lower", "inner", "back", and the like are presented, they are based on the azimuth or the positional relationship shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, if any, are also used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

The present embodiment relates to an electrical device copper bar sealing structure for sealing a gap between an electrical device case 1 and a copper bar 2 penetrating out of the electrical device case 1.

The electrical device copper bar sealing structure comprises a sealing element 3 and a pressing plate 4 for fixing the sealing element 3 on a device shell. The sealing element 3 is used for sleeving the part of the copper bar 2 extending out of the electric device shell 1. The pressing plate 4 is used to be connected to the electric device case 1 and is formed with a receiving space therebetween. The seal 3 can be restrained in the accommodation space and pressed by the inner wall of the accommodation space, abutting between the copper bar 2 and the inner wall of the accommodation space.

The sealing structure of the copper bar of the electric device of the embodiment is characterized in that the sealing element 3 is sleeved on the copper bar 2, the sealing element 3 can be restrained in the accommodating space between the pressing plate 4 and the electric device shell 1, when the pressing plate 4 is connected with the electric device shell 1, the sealing element 3 can be extruded through the inner wall of the accommodating space, and the sealing element 3 is abutted between the copper bar 2 and the inner wall of the accommodating space, so that the gap between the electric device shell 1 and the copper bar 2 is sealed, the installation is convenient, and the sealing effect is good.

Based on the above general description, an exemplary structure of the copper bar sealing structure of the electrical device according to the present embodiment is shown in fig. 1 to 4. In which fig. 1 and 2 illustrate the sealing structure in an initial state, and fig. 3 and 4 illustrate the sealing structure in a coupled state. In order to highlight the copper bar sealing structure of the electric device in this embodiment, only a part of the structure of the electric device case 1 and the application of the sealing structure to one copper bar 2 are illustrated in the drawings.

In addition, the electrical device of the embodiment may be a product in which the copper bar 2 is disposed on the housing in the prior art, such as a fuel cell stack, and a sealing requirement is provided between the copper bar 2 and the electrical device housing 1. The copper bar 2 can be a negative copper bar 2 or a positive copper bar 2, so long as the use requirement is met.

As a preferred embodiment, a predetermined gap is formed between the inner peripheral wall of the seal 3 and the outer peripheral wall of the copper bar 2. The setting of clearance is preset here, does benefit to the smoothness and the convenience of operation that improve sealing member 3 cover was established and was removed on copper bar 2 for sealing member 3's installation need not to use the lubricant, not only does benefit to and improves installation effectiveness, still does benefit to reduction in production cost. The preset gap here may be 0.15 to 0.35mm. For example, the preset gap may be 0.2mm, and in practical implementation, the size of the preset gap may be set according to the use requirement.

The sealing member 3 in this embodiment is specifically a sealing ring so as to be sleeved on the copper bar 2, and the sealing member 3 is preferably made of a sealing ring made of rubber in the prior art, so as to have a better sealing effect.

As shown in fig. 2 and 6, the electric device case 1 is provided with a first accommodation groove 103 for accommodating the seal member 3, the first accommodation groove 103 including a pressing portion, an inner wall of the pressing portion being provided as a first tapered surface 104, the first tapered surface 104 pressing the seal member 3 and radially contracting the seal member 3 to abut against the copper bar 2. In this embodiment, radial contraction of the seal 3 means that the diameter of the inner contour surface of the seal 3 becomes smaller.

The first accommodation groove 103 in the present embodiment is for accommodating the bottom of the seal member 3, and constitutes a part of the accommodation space. When the pressing plate 4 is connected with the electric device case 1, not only the bottom of the sealing member 3 can be positioned by the first accommodation groove 103, but also the pressing effect of the inner wall of the first accommodation groove 103 on the sealing member 3 can be improved by the guiding of the first tapered surface 104. The extruded sealing member 3 radially contracts to reduce the diameter of the inner contour of the sealing member 3 and to increase the diameter of the outer contour of the sealing member 3, thereby enabling the bottom inner wall of the sealing member 3 to fill the preset gap between the sealing ring and the copper bar 2, and realizing the sealing between the electrical device housing 1 and the copper bar 2.

As a preferred embodiment, as shown in fig. 2 and 5, the end of the sealing member 3 near the electric device housing 1 is provided with a first mating surface 301. The first conical surface 104 presses on the first matching surface 301, and the first matching surface 301 is a bevel adapted to the first conical surface 104. The first matching surface 301 is in guiding fit with the first conical surface 104, so that the pressing effect of the first conical surface 104 on the sealing element 3 is further improved, and the sealing effect of the sealing element 3 is further improved.

As shown in fig. 2 and 6, in the present embodiment, the first accommodation groove 103 includes a cylindrical portion that meets the pressing portion, and the seal member 3 is provided with a columnar portion 303 that fits the cylindrical portion. Here, by providing the cylindrical portion, not only the housing and positioning effect of the first housing groove 103 on the bottom of the sealing member 3 can be improved, but also the sealing member 3 can be abutted against the columnar portion 303 of the sealing member 3 when the sealing member 3 is pressed, thereby improving the sealing effect of the sealing member 3 and the electrical device housing 1.

As a preferred embodiment, as shown in fig. 2 and 7, the pressing plate 4 is provided with a second accommodating groove 401, at least part of the side wall of the second accommodating groove 401 is provided with a second conical surface 402, and the second conical surface 402 presses the sealing member 3 and radially contracts the sealing member 3 to abut against the copper bar 2. The second accommodation groove 401 here is capable of accommodating the top of the sealing member 3, and cooperates with the second accommodation groove 401 to constitute the accommodation space described above.

In this embodiment, the second accommodating groove 401 and the second taper surface 402 thereon are configured, so that when the pressing plate 4 is connected with the electric device housing 1, the second accommodating groove 401 is guided to press the sealing member 3 by the second taper surface 402, and the pressing effect of the inner wall of the second accommodating groove 401 on the sealing member 3 is improved. The extruded seal 3 radially contracts, reducing the diameter of the inner contour of the seal 3 and increasing the diameter of the outer contour of the seal 3, so that the top inner wall of the seal 3 can fill the preset gap between the sealing ring and the copper bar 2, realizing the seal between the electrical device housing 1 and the copper bar 2.

Further, as shown in fig. 2, the end of the sealing member 3 near the pressing plate 4 is provided with a second mating surface 302, the second conical surface 402 is pressed against the second mating surface 302, and the second mating surface 302 is a slope adapted to the second conical surface 402. The second matching surface 302 and the second conical surface 402 are in guiding fit, so that the pressing effect of the second conical surface 402 on the sealing element 3 is further improved, and the sealing effect of the sealing element 3 is further improved.

In the present embodiment, by the cooperation of the first accommodation groove 103 and the second accommodation groove 401, it is possible to press the sealing member 3 when the pressing plate 4 and the electric device case 1 are connected, and make the sealing member 3 constitute the seal of the gap between the electric device case 1 and the copper bar 2. Here, the first accommodation groove 103 and the second accommodation groove 401 are simple in structure, convenient for structural molding, and good in use effect. The shape of the inner peripheral surface of the seal 3 is set to follow the shape of the outer peripheral surface, that is, the bottom and the bottom of the inner peripheral surface of the seal 3 are inclined surfaces, the inclined surface of the top is consistent with the second mating surface 302, the inclined surface of the bottom is consistent with the first mating surface 301, and the middle of the inner peripheral surface of the seal 3 is columnar.

It should be noted that, in this embodiment, it is also possible to provide only the first accommodation groove 103 or the second accommodation groove 401, and in this case, the sealing member 3 can also have an effect of sealing the copper bar 2 by pressing the sealing member 3 through the inner wall of the first accommodation groove 103.

As a preferred embodiment, the pressure plate 4 is screwed to the electrical device housing 1 by means of a screw pair. The pressing plate 4 is connected with the electric device shell 1 through the screw pair in a screwed mode, so that the connection mode is simple, the connection effect is good, the operation is easy, and meanwhile, the sealing element 3 can be extruded. In specific implementation, referring to fig. 1, the screw thread pairs are a plurality of screw thread pairs arranged at intervals around the copper bar 2. The multiple thread pairs are matched with each other, so that the connection effect is good, and the pressing force on the sealing element 3 is more uniform and stable.

As shown in fig. 1, the screw pair in the present embodiment includes four screw blind holes 102 arranged at intervals around the copper bar 2, and four bolts 5 provided through the pressing plate 4 in one-to-one correspondence with the respective screw blind holes 102. Wherein, two blind threaded holes 102 are arranged at intervals on both sides of the width direction of the copper bar 2. With the fastening connection of the bolt 5 and the threaded blind hole 102, the sealing element 3 is extruded to achieve a better sealing effect. In specific implementation, the electric device housing 1 may be provided with a boss 101 protruding upwards, the copper bar 2 is disposed through the boss 101, and each threaded blind hole 102 is disposed on the boss 101. Of course, the number of screw thread pairs can also be set according to the use requirements.

In the copper bar sealing structure of the electrical device in this embodiment, when the copper bar sealing structure is installed, the sealing element 3 is sleeved on the copper bar 2, the bottom of the sealing element 3 is abutted against the bottom of the first accommodating groove 103, then the pressing plate 4 is sleeved on the copper bar 2, when the bottom of the second accommodating groove 401 is abutted against the top of the sealing element 3, each bolt 5 is pre-installed in the corresponding threaded blind hole 102, the pressing plate 4 is fixedly installed on the electrical device shell 1, the first matching surface 301 is in guiding fit with the first conical surface 104, the second matching surface 302 is in guiding fit with the second conical surface 402, so that the sealing element 3 is abutted against the copper bar 2 by the pressing plate 4 and the electrical device shell 1, and is radially contracted, and thus the sealing between the electrical device shell 1 and the copper bar 2 is realized.

In addition, the copper bar sealing structure of the electric device has the advantages of being simple in structure, easy to assemble, capable of improving assembly efficiency, good in sealing effect and good in sealing consistency.

Example two

The embodiment also relates to a fuel cell stack, wherein the copper bar sealing structure of the electric device is arranged.

In specific implementation, as shown in fig. 1 and fig. 3, the fuel cell stack includes a stack housing 100, a mounting hole is formed at the top of the stack housing 100, a cover plate for plugging the mounting hole is disposed on the stack housing 100, and the above-mentioned electrical device housing 1 is specifically a cover plate, and the cover plate is provided with the electrical device copper bar sealing structure in the first embodiment.

The bottom ends of the positive copper bar 2 and the negative copper bar 2 on the fuel cell stack are respectively connected with a pile connecting end positioned in the pile housing 100, and the top ends of the positive copper bar 2 and the negative copper bar 2 are respectively connected with a connecting end positioned in a DC/DC housing above the pile housing 100. Sealing member 3 and clamp plate 4 set up with anodal copper bar 2 and negative pole copper bar 2 one-to-one respectively to realize between anodal copper bar 2 and the apron, and the sealing of clearance between negative pole copper bar 2 and the apron, and have better sealed effect, thereby satisfy the user demand of fuel cell stack.

The fuel cell stack of the embodiment can improve the sealing effect between the copper bar 2 and the cover plate by arranging the copper bar sealing structure of the electric device, thereby improving the use safety of the fuel cell stack.

Furthermore, the present embodiment also relates to a vehicle in which the fuel cell stack as described above is provided.

The vehicle of the present embodiment has the same advantages as the fuel cell stack described above, and will not be described here again.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. An electric device copper bar sealing structure for sealing a gap between an electric device shell (1) and a copper bar (2) penetrating out of the electric device shell (1), which is characterized in that:

The electric device copper bar sealing structure comprises a sealing piece (3) and a pressing plate (4) for fixing the sealing piece (3) on the electric device shell (1);

The sealing element (3) is used for being sleeved on the part, extending out of the electric device shell (1), of the copper bar (2), the pressing plate (4) is used for being connected with the electric device shell (1), an accommodating space is formed between the pressing plate and the electric device shell, the sealing element (3) can be restrained in the accommodating space and extruded by the inner wall of the accommodating space, and is abutted between the copper bar (2) and the inner wall of the accommodating space.

2. The electrical device copper bar sealing structure according to claim 1, wherein:

The electric device shell (1) is provided with a first accommodating groove (103) for accommodating the sealing element (3);

The first accommodating groove (103) comprises a pressing part, the inner wall of the pressing part is provided with a first conical surface (104), and the first conical surface (104) presses the sealing piece (3) and radially contracts the sealing piece (3) to be abutted with the copper bar (2).

3. The electrical device copper bar sealing structure according to claim 2, wherein:

A first matching surface (301) is arranged at one end, close to the electric device shell (1), of the sealing element (3);

The first conical surface (104) is extruded on the first matching surface (301), and the first matching surface (301) is an inclined surface which is matched with the first conical surface (104).

4. The electrical device copper bar sealing structure according to claim 2, wherein:

The first accommodating groove (103) comprises a cylindrical part connected with the extrusion part, and the sealing element (3) is provided with a cylindrical part (303) matched with the cylindrical part.

5. The electrical device copper bar sealing structure according to claim 1, wherein:

The pressing plate (4) is provided with a second accommodating groove (401), at least part of the side wall of the second accommodating groove (401) is provided with a second conical surface (402), and the second conical surface (402) presses the sealing piece (3) and enables the sealing piece (3) to radially shrink to be abutted with the copper bar (2).

6. The electrical device copper bar sealing structure according to claim 5, wherein:

a second matching surface (302) is arranged at one end, close to the pressing plate (4), of the sealing element (3);

The second conical surface (402) is pressed on the second matching surface (302), and the second matching surface (302) is an inclined surface which is matched with the second conical surface (402).

7. The electrical device copper bar sealing structure according to any one of claims 1 to 6, wherein:

The pressing plate (4) is connected with the electric device shell (1) through a screw pair in a screw mode.

8. The electrical device copper bar sealing structure according to claim 7, wherein:

The thread pairs are arranged at intervals around the copper bars (2).

9. A fuel cell stack characterized by:

the fuel cell stack is provided with the electrical device copper bar sealing structure according to any one of claims 1 to 8.

10. A vehicle, characterized in that:

the fuel cell stack according to claim 9 is provided in the vehicle.