CN220774548U

CN220774548U - Battery end cover assembly and battery

Info

Publication number: CN220774548U
Application number: CN202322391537.2U
Authority: CN
Inventors: 黄伟; 汪洋; 任盛华
Original assignee: Huajin New Energy Power Zhejiang Co ltd
Current assignee: Huajin New Energy Power Zhejiang Co ltd
Priority date: 2023-09-04
Filing date: 2023-09-04
Publication date: 2024-04-12
Anticipated expiration: 2033-09-04

Abstract

The utility model provides a battery end cover assembly and a battery, wherein the battery end cover assembly comprises: a cover plate having a mounting through hole therein; the first side surface of the cover plate is also provided with a plurality of reinforcing blocks which are looped around the mounting through holes; the insulating piece is arranged on the second side surface of the cover plate, and an electric connection through hole corresponding to the installation through hole is formed in the insulating piece; the pole assembly is arranged in the mounting through hole; the pole assembly comprises a pole and an injection molding piece, wherein the pole is arranged in the mounting through hole and extends out of the first side surface; a gap is formed between the pole and the mounting through hole, and the injection molding piece is formed in the gap and extends to the first side surface to cover the reinforcing block. The battery end cover assembly provided by the utility model has the advantages of good sealing effect, simple structure and convenience in assembly.

Description

Battery end cover assembly and battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery end cover assembly and a battery.

Background

Secondary batteries, also called rechargeable batteries or secondary batteries, refer to batteries that can be used continuously by activating an active material by charging after the battery is discharged. Compared with the primary battery, the secondary battery is a chemical power supply widely used in the world, and has the advantages of stable voltage, safety, reliability, low price, wide application range, rich raw materials, high recycling rate and the like. In recent years, in order to cope with environmental problems, gasoline price problems, and energy storage problems, the application of secondary batteries has been rapidly expanded to hybrid electric vehicles, and energy storage systems.

In order to draw out the electric energy inside the secondary battery to the outside, the battery top cover is provided with a mounting through hole, but because the secondary battery is internally provided with electrolyte, in order to prevent the electrolyte from leaking to the outside to cause safety accidents, a sealing piece is required to be arranged between the end cover and the electrode terminal for sealing, and the tightness between the end cover and the electrode terminal is an important key for guaranteeing the safety of the battery. At present, the end cover and the electrode terminal are generally fixed by arranging a plastic package part outside the end cover, and a sealing ring is arranged between a through hole in the end cover and the electrode terminal to realize sealing between the end cover and the electrode terminal.

Disclosure of Invention

Accordingly, in order to overcome the above problems, the present utility model provides a battery end cap assembly including a high-strength injection molded part, which is a core sealing member, which is simple to assemble, and a battery corresponding to the battery end cap assembly.

According to a first aspect, the present utility model provides a battery end cap assembly comprising:

a cover plate having a mounting through hole therein; the first side surface of the cover plate is also provided with a plurality of reinforcing blocks which are looped around the mounting through holes;

the insulating piece is arranged on the second side surface of the cover plate, and an electric connection through hole corresponding to the installation through hole is formed in the insulating piece;

the pole assembly is arranged in the mounting through hole; the pole assembly comprises a pole and an injection molding piece, wherein the pole is arranged in the mounting through hole and extends out of the first side surface; a gap is formed between the pole and the mounting through hole, and the injection molding piece is formed in the gap and extends to the first side surface to cover the reinforcing block.

In an alternative embodiment, the distance between the reinforcing block and the axis of the pole increases gradually as it moves away from the first side.

In an alternative embodiment, the mounting through hole comprises a first hole section and a second hole section, the second hole section is located at an end of the mounting through hole close to the first side, and the aperture of the second hole section is larger than the aperture of the first hole section.

In an alternative embodiment, the pole comprises a first pole section and a second pole section, the first pole section being located in the mounting through hole, the second pole section extending outside the first side, the diameter of the second pole section being greater than the diameter of the first pole section.

In an alternative embodiment, the pole further comprises a reinforcing ring, and the reinforcing ring is fixedly sleeved outside the second pole section; the injection molding piece coats the reinforcing ring.

According to a second aspect, the utility model also provides a battery comprising:

a housing, an electrode assembly, and a battery end cap assembly according to any one of the embodiments of the first aspect, the electrode assembly being disposed within the housing, the battery end cap assembly covering an opening of the housing; the electrode post is electrically connected with the electrode assembly.

The technical scheme of the utility model has the following advantages:

1. according to the battery end cover assembly provided by the utility model, the first side surface of the cover plate is provided with the plurality of reinforcing blocks which are looped around the mounting through holes, and the injection molding piece which is formed between the mounting through holes and the polar posts to fill the gaps between the mounting through holes and the polar posts is arranged, so that the sealing effect is achieved, and meanwhile, the strength of the injection molding piece and the bonding compactness between the injection molding piece and the end cover can be improved by arranging the injection molding piece to extend to the first side surface to cover the reinforcing blocks; furthermore, the sealing requirement of the battery end cover assembly is met only through one injection molding piece, and the assembly steps of the battery end cover assembly are simplified.

2. According to the battery end cover assembly provided by the utility model, the mounting through hole is arranged to comprise the first hole section and the second hole section, and the aperture of the second hole section is larger than that of the first hole section, so that a step surface is formed on the part of the injection molding part positioned in the mounting through hole, and the sealing effect of the injection molding part is further improved.

3. According to the battery end cover assembly provided by the utility model, the pole post comprises the first pole section and the second pole section, and the second pole section extends out of the first side surface, and the diameter of the second pole section is larger than that of the first pole section, so that the injection molding piece forms a step surface at the position of the first side surface corresponding to the plane, and the sealing effect of the injection molding piece is further improved.

4. According to the battery end cover assembly provided by the utility model, the reinforcing ring is sleeved outside the second column section and is coated by the injection molding piece, so that the strength of the injection molding piece can be further improved, and the sealing effect of the injection molding piece is further improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a battery end cap assembly according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a battery end cap assembly according to an embodiment of the present utility model;

FIG. 3 is a partial cross-sectional view of a battery end cap assembly provided in an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of an injection molded part according to an embodiment of the present utility model;

reference numerals illustrate:

1-a cover plate; 11-mounting through holes; 11 a-a first bore section; 11 b-a second bore section; 12-reinforcing blocks;

2-an insulator; 2 a-electrical connection vias;

a 3-pole assembly; 31-pole; 31 a-a first column section; 31 b-a second column section; 31 c-a reinforcing ring; 32-injection molding; 32 a-a first step surface; 32 b-a second step surface.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

It is important to note that the construction and arrangement of the present application as shown in a variety of different exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present utility model. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present utility models. Therefore, the utility model is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the utility model, or those not associated with practicing the utility model). And the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

The embodiment of the utility model provides a battery which can be applied to the fields of oil-electricity hybrid electric vehicles or electric vehicles and the like. Specifically, the battery comprises a shell, an electrode assembly and a battery end cover assembly, wherein the electrode assembly is arranged in the shell, the battery end cover assembly covers the opening of the shell, and a pole column (comprising a positive pole column and a negative pole column) in the battery end cover assembly is electrically connected with the electrode assembly.

Referring to fig. 1 to 4, a schematic structural diagram of a battery end cap assembly according to an embodiment of the present utility model is provided, and the battery end cap assembly includes a cover plate 1, an insulating member 2 and a post assembly 3. Wherein, the cover plate 1 is internally provided with a mounting through hole 11, and the first side surface of the cover plate 1 is also provided with a plurality of reinforcing blocks 12 which are looped around the mounting through hole 11; the insulating member 2 is arranged on the second side surface of the cover plate 1, and the insulating member 2 is internally provided with an electric connection through hole 2a corresponding to the mounting through hole 11; the pole assembly 3 is arranged in the installation through hole 11; the pole assembly 3 includes a pole 31 and an injection molding piece 32, the pole 31 is disposed in the mounting through hole 11 and extends outside the first side, a gap is formed between the pole 31 and the mounting through hole 11, and the injection molding piece 32 is formed in the gap and extends to the first side to cover the reinforcing block 12.

Specifically, the second side surface refers to a side surface of the cover plate 1 facing the casing when the battery end cover assembly covers the opening of the casing of the battery, and the second side surface may also be referred to as an inner side surface; the first side is the side opposite the second side, which may also be referred to as the outer side.

Specifically, the portion of the injection molding 32 extending outside the mounting through hole 11 covers the reinforcing block 12 and also covers the column circumferential surface of the pole 31.

Specifically, the injection molding 32 may be a rubber injection molding.

Specifically, the number of the electrode post assemblies 3 in the battery end cover assembly may be two, the electrode posts 31 in the two electrode post assemblies 3 are respectively a positive electrode post and a negative electrode post, and the structures of the two electrode post assemblies 3 are identical except that the metal materials of the positive electrode post and the negative electrode post are different.

It should be understood by those skilled in the art that, in addition to the post assembly 3, the battery end cap assembly should further include a liquid injection hole, an explosion-proof valve, etc., but this is not a core innovation point of the present embodiment, and thus the present application will not be repeated. The structure of the liquid injection hole and the explosion-proof valve in this embodiment may be any one of the existing structures.

In this embodiment, in order to further improve the sealing effect of the injection molding 32, as shown in fig. 2 to 4, the mounting through hole 11 may be provided to include a first hole section 11a and a second hole section 11b, the second hole section 11b is located at an end of the mounting through hole 11 near the first side, and the aperture of the second hole section 11b is larger than that of the first hole section 11 a. At this time, the injection molding 32 will generate the first step surface 32a corresponding to the transition plane of the first hole section 11a and the second hole section 11b, and the sealability of the injection molding 32 will be improved.

In this embodiment, in order to further improve the sealing effect of the injection molding member 32, as shown in fig. 2-4, the pole 31 may include a first pole segment 31a and a second pole segment 31b, where the first pole segment 31a is located in the mounting through hole 11, the second pole segment 31b extends outside the first side, and the diameter of the second pole segment 31b is greater than that of the first pole segment 31 a. At this time, the injection molding 32 will generate the second step surface 32b corresponding to the transition surface of the first and second column sections 31a and 31b, and the sealability of the injection molding 32 will be improved.

In this embodiment, in order to further increase the strength of the injection-molded part 32, as shown in fig. 2 and 3, it may be provided that the distance between the reinforcing block 12 and the axis of the pole 31 gradually increases in the process of being away from the first side surface. The pole 31 may further include a reinforcing ring 31c, the reinforcing ring 31c is fixedly sleeved outside the second column section 31b, the injection molding member 32 wraps the reinforcing ring 31c, and strength is further improved.

In summary, in the battery end cover assembly in the embodiment of the utility model, the first side surface of the cover plate 1 is provided with the plurality of reinforcing blocks 12 which are arranged around the mounting through hole 11, and the injection molding piece 32 which is formed between the mounting through hole 11 and the pole 31 to fill the gap between the mounting through hole 11 and the pole 31 is arranged, so that the sealing effect is achieved, and meanwhile, the injection molding piece 32 is arranged to extend to the first side surface to cover the reinforcing blocks 12, so that the strength of the injection molding piece 32 and the bonding compactness between the injection molding piece 32 and the end cover are improved, and the sealing effect of the injection molding piece 32 is further ensured; furthermore, the sealing requirements of the battery end cap assembly are met by only one injection molding 32, simplifying the assembly steps of the battery end cap assembly.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. A battery end cap assembly, comprising:

a cover plate (1) having a mounting through hole (11) therein; the first side surface of the cover plate (1) is also provided with a plurality of reinforcing blocks (12) which are looped around the mounting through holes (11);

the insulating piece (2) is arranged on the second side surface of the cover plate (1), and an electric connection through hole (2 a) corresponding to the mounting through hole (11) is formed in the insulating piece (2);

the pole assembly (3) is arranged in the mounting through hole (11); the pole assembly (3) comprises a pole (31) and an injection molding piece (32), wherein the pole (31) is arranged in the mounting through hole (11) and extends out of the first side surface; a gap is formed between the pole (31) and the mounting through hole (11), and the injection molding piece (32) is formed in the gap and extends to the first side surface to cover the reinforcing block (12).

2. The battery end cap assembly of claim 1, wherein the distance between the reinforcing block (12) and the axis of the post (31) increases progressively away from the first side.

3. The battery end cap assembly of claim 1, wherein the mounting through hole (11) comprises a first hole section (11 a) and a second hole section (11 b), the second hole section (11 b) is located at an end of the mounting through hole (11) near the first side, and the second hole section (11 b) has a larger pore size than the first hole section (11 a).

4. A battery end cap assembly according to any of claims 1-3, wherein the post (31) comprises a first post section (31 a) and a second post section (31 b), the first post section (31 a) being located within the mounting through hole (11), the second post section (31 b) extending beyond the first side, the second post section (31 b) having a diameter that is larger than the diameter of the first post section (31 a).

5. The battery end cap assembly of claim 4, wherein the post (31) further comprises a reinforcement ring (31 c), the reinforcement ring (31 c) being fixedly sleeved outside the second post segment (31 b); the injection molding (32) covers the reinforcing ring (31 c).

6. A battery, comprising:

a housing, an electrode assembly disposed within the housing, and the battery end cap assembly of any one of claims 1-5 covering an opening of the housing; the post (31) is electrically connected to the electrode assembly.