CN218070005U

CN218070005U - Battery and top cap subassembly thereof

Info

Publication number: CN218070005U
Application number: CN202221715391.1U
Authority: CN
Inventors: 齐朗; 袁志巍; 温世森; 陶芝勇; 郑鹏
Original assignee: Shenzhen Topband Battery Co ltd; Nantong Tuobang Youneng Technology Co ltd
Current assignee: Shenzhen Topband Battery Co ltd; Nantong Tuobang Youneng Technology Co ltd
Priority date: 2022-07-04
Filing date: 2022-07-04
Publication date: 2022-12-16
Anticipated expiration: 2032-07-04

Abstract

The utility model provides a battery top cap subassembly, including the top cap piece, an electrode, a fixing member, first gasket and second gasket, be equipped with first through-hole on the first gasket, be equipped with the second through-hole on the second gasket, be equipped with the third through-hole on the top cap piece, electrode and/or mounting are worn to establish first through-hole, in second through-hole and the third through-hole, electrode and mounting are fixed together and electric connection, the electrode mounting compresses tightly first gasket, top cap piece and second gasket, realize battery top cap subassembly's monolithic stationary, first gasket keeps apart and sealing electrode and top cap piece, second gasket keeps apart and sealing mounting and top cap piece. The utility model also provides a battery, include the shell and establish foretell battery top cap subassembly on the shell. The battery and the top cover assembly thereof have simple structure and fewer parts, reduce the thickness of the top cover assembly of the battery and are beneficial to improving the energy density of the battery; and the material consumption is reduced, thereby reducing the cost.

Description

Battery and top cap subassembly thereof

Technical Field

The utility model belongs to the technical field of the battery and specifically relates to a battery and top cap subassembly thereof is related to.

Background

In the production and manufacturing process and the design process, the energy density is higher and higher, the overall requirement structure of the battery cover plate is simplified, and the energy density is improved.

Referring to fig. 1-2, a conventional top cap assembly of a battery includes a top cap sheet 51, an electrode post 52, an upper plastic part 53 and a lower plastic part 54, the electrode post 52 passes through the lower plastic part 54 and the top cap sheet 51 from the lower side, the upper plastic part 53 is mounted on the upper end of the electrode post 52 at the upper side, and since the upper plastic part 53 plays a role of fixing, it is made of plastic material, and needs a relatively thick thickness in order to endure high mechanical strength, thereby affecting the thickness of the whole cap sheet and affecting the total energy density of a cell design. Moreover, the lower plastic 54 only plays an insulating role, and an additional sealing ring 55 is required to seal the electrode column 52 and the lower plastic 54.

There is a need for a battery and a cap assembly thereof that is simple in construction and facilitates increasing the energy density of the battery.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the present invention is to provide an improved battery and top cap assembly thereof to the above-mentioned defects in the related art.

The utility model provides a technical scheme that its technical problem adopted includes: the utility model provides a battery top cover subassembly, includes top cap piece, electrode, mounting, first gasket and second gasket, be equipped with first through-hole on the first gasket, be equipped with the second through-hole on the second gasket, be equipped with the third through-hole on the top cap piece, first through-hole, the second through-hole with the third through-hole aligns, first gasket is established the electrode with between the top cap piece, the second gasket is established the mounting with between the top cap piece, the electrode and/or the mounting wears to establish first through-hole, the second through-hole with in the third through-hole, the mounting with the top cap piece is fixed together and electric connection, the electrode with the mounting compresses tightly from both sides first gasket, top cap piece and second gasket, first gasket keeps apart and seals the electrode with the top cap piece, the second gasket keeps apart and seals the mounting with the top cap piece.

Preferably, one of the electrode and the fixing member includes a base portion and a connection portion electrically connected to the other through the first through hole, the second through hole and the third through hole.

Preferably, a convex ring protruding in the thickness direction of the main body part is arranged on the first gasket or the second gasket, surrounds the connecting part, is located between the connecting part and the top cover sheet, and isolates the base part from the top cover sheet.

Preferably, the fixing member is in the form of a plate parallel to the top flap.

Preferably, one side of the second gasket, which faces the fixing piece, is provided with a concave position matched with the fixing piece, and the fixing piece is sunk into the concave position.

Preferably, one side of the electrode facing the first gasket is provided with a first rotation prevention portion for preventing the electrode from rotating, and the first rotation prevention portion presses on the first gasket.

Preferably, the first rotation prevention part is rugged.

Preferably, one side of the top cover plate facing the electrode is provided with a second rotation prevention portion for preventing the electrode from rotating, the second rotation prevention portion corresponds to the first rotation prevention portion and is in a rugged shape, and the first gasket is tightly pressed between the first rotation prevention portion and the second rotation prevention portion.

Preferably, the electrode and the fixing member are welded by laser welding.

The utility model provides a technical scheme that its technical problem adopted includes: a battery is provided, which comprises a shell and the battery top cover component arranged on the shell.

Implement the technical scheme of the utility model, following beneficial effect has at least: the battery and the electrode and the fixing piece of the top cover component of the battery are fixed together and electrically connected, the first gasket, the top cover plate and the second gasket are compressed from two sides, the integral fixation of the top cover component of the battery can be realized, the structure is simple, the number of parts is less, the thickness of the top cover component of the battery is reduced, and the energy density of the battery is favorably improved; the material consumption is reduced, so that the cost is reduced; meanwhile, the first gasket is used for isolating and sealing the electrode and the top cover plate, the second gasket is used for isolating and sealing the fixing piece and the top cover plate, a sealing ring is not required to be added, and the structure is further simplified.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a perspective view of a cap assembly of a battery in the related art.

Fig. 2 is an exploded view of the cap assembly of fig. 1.

Fig. 3 is a perspective view of a battery top cap assembly according to an embodiment of the present invention.

Fig. 4 is a perspective view of the battery top cap assembly of fig. 3.

Fig. 5 isbase:Sub>A sectional view taken atbase:Sub>A positionbase:Sub>A-base:Sub>A in fig. 3.

Fig. 6 is a partially enlarged view of a portion B in fig. 5.

Fig. 7 is an exploded view of the battery top cap assembly of fig. 3.

Fig. 8 is an exploded view of the battery top cap assembly of fig. 3.

Fig. 9 is a perspective view of an electrode of the battery top cap assembly of fig. 3.

Fig. 10 is a front view of a battery according to an embodiment of the present invention.

The reference numerals in the figures denote: the top cover plate 1, the third through hole 11, the second rotation prevention part 12, the electrode 21, the first rotation prevention part 211, the fixing part 22, the base part 23, the connecting part 24, the first gasket 31, the first through hole 311, the second gasket 32, the second through hole 321, the convex ring 33, the housing 4, the top cover plate 51 of the background art, the electrode column 52 of the background art, the upper plastic part 53 of the background art, the lower plastic part 54 of the background art, and the sealing ring 55 of the background art.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that if the terms "upper", "lower", "top", "bottom", etc. are used herein to indicate an orientation or positional relationship based on that shown in the drawings, the terms are constructed and operate in a specific orientation for convenience of description, and do not indicate that the device or component being referred to must have a specific orientation, and therefore should not be construed as limiting the present invention. It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and the like are intended to be inclusive and mean that there may be, for example, a fixed connection, a removable connection, or an integral part; either directly or indirectly through intervening media, either internally or in any other relationship. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or intervening elements may also be present. If the terms "first", "second", "third", etc. are used herein only for convenience in describing the present technical solution, they should not be taken as indicating or implying any relative importance or to implicitly indicate the number of technical features indicated, whereby the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of those features. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

Referring to fig. 3 to 9, a battery top cap assembly according to an embodiment of the present invention includes a top cap sheet 1, an electrode 21, a fixing member 22, a first gasket 31 and a second gasket 32, wherein the first gasket 31 is provided with a first through hole 311 penetrating in a thickness direction, the second gasket 32 is provided with a second through hole 321, the top cap sheet 1 is provided with a third through hole 11, the first through hole 311, the second through hole 321 and the third through hole 11 are aligned, the first gasket 31 is provided between the electrode 21 and the top cap sheet 1, the second gasket 32 is provided between the fixing member 22 and the top cap sheet 1, the electrode 21 and/or the fixing member 22 are provided through the first through hole 311, the second through hole 321 and the third through hole 11, the electrode 21 and the fixing member 22 are fixed together and electrically connected, the fixing member 22 and the top cap sheet 1 are pressed along the thickness direction of the top cap sheet 1 from both sides, the first gasket 31 isolates and seals the electrode 21 from the top cap sheet 1, the second gasket 32 isolates and seals the fixing member 22 from the top cap sheet 1, thereby isolating the electrode 21 from the top cap sheet 1 and the top cap sheet 21 from each other side, and the top cap sheet 31, and the top cap 21 is not electrically connected to each other, and the top cap 31, thereby preventing the short circuit between the electrode 21 and the top cap 31 from being short circuit; the fixing member 22 and the top cover sheet 1 are separated by the second gasket 32 so as not to contact each other to prevent the fixing member 22 and the top cover sheet 1 from being electrically connected to cause short circuit, and the second gasket 32 seals a gap between the fixing member 22 and the top cover sheet 1.

Compared with the traditional top cover assembly of the battery, the electrode 21 and the fixing part 22 of the top cover assembly of the battery are together and electrically connected, and the first gasket 31, the top cover plate 1 and the second gasket 32 are pressed from two sides, so that the whole fixation of the top cover assembly of the battery can be realized, the structure is simple, the number of parts is less, the thickness (also called height) of the top cover assembly of the battery is reduced, and the energy density of the battery is favorably improved; the material consumption is reduced, so that the cost is reduced; meanwhile, the first gasket 31 is used for isolating and sealing the electrode 21 and the top cover plate 1, the second gasket 32 is used for isolating and sealing the fixing piece 22 and the top cover plate 1, a sealing ring does not need to be added, and the structure is further simplified.

The first pad 31 and the second pad 32 may be made of insulating plastic or PFA.

Preferably, one of the electrode 21 and the fixing member 22 includes a base portion 23 and a connecting portion 24, and the connecting portion 24 is electrically connected to the other through the first through hole 311, the second through hole 321, and the third through hole 11, and may be connected by welding (e.g., laser welding). Specifically, in the first embodiment, referring to fig. 9, the electrode 21 includes a base 23 and a connecting portion 24, and the connecting portion 24 passes through the first through hole 311, the second through hole 321, and the third through hole 11 to electrically connect to the fixing member 22; in the second embodiment, the fixing member 22 includes a base portion 23 and a connecting portion 24, and the connecting portion 24 passes through the first through hole 311, the second through hole 321 and the third through hole 11 to electrically connect the electrode 21. Wherein the width of the connecting portion 24 is smaller than the width of the base portion 23 (when the connecting portion 24 is cylindrical, the width is the radial dimension).

Preferably, the first gasket 31 or the second gasket 32 is provided with a convex ring 33 protruding along the thickness direction of the main body, and the convex ring 33 surrounds the side surface of the connecting part 24 and is positioned between the connecting part 24 and the top cover sheet 1 to separate the base part 23 and the top cover sheet 1.

Preferably, in the first embodiment, referring to fig. 7-8, the fixing member 22 is in the shape of a sheet parallel to the top cover sheet 1, and may be in the shape of a polygonal, circular or irregular sheet, which is beneficial to reducing the thickness of the battery top cover assembly.

Preferably, the side of the second pad 32 facing the fixing member 22 is provided with a recess 322 matching the fixing member 22, and the fixing member 22 is recessed into the recess 322 to prevent the fixing member 22 from rotating.

Preferably, a side of the electrode 21 facing the first gasket 31 is provided with a first rotation preventing part 211 for preventing the electrode 21 from rotating, and the first rotation preventing part 211 is pressed on the first gasket 31 around the periphery of the first through hole 311, thereby preventing rotation by friction and physical structural characteristics. The first rotation-preventing portion 211 may be uneven to increase friction and enhance rotation-preventing effect. Further, one side of the top cover plate 1 facing the electrode 21 is provided with a second rotation preventing portion 12 for preventing the electrode 21 from rotating, the second rotation preventing portion 12 corresponds to the first rotation preventing portion 211 and is uneven and surrounds the periphery of the third through hole 11, the first gasket 31 is pressed between the first rotation preventing portion 211 and the second rotation preventing portion 12, and therefore the rotation preventing effect of the first rotation preventing portion 211 and the second rotation preventing portion 12 is further enhanced through the first gasket 31.

Preferably, the electrode 21 and the fixing member 22 are welded by laser welding, so that the machining efficiency is high, the stability is high, and the cost is low.

To sum up, compared with the traditional top cover assembly of the battery, the electrode 21 and the fixing part 22 of the top cover assembly of the battery are together and electrically connected, and the first gasket 31, the top cover plate 1 and the second gasket 32 are pressed from two sides, so that the whole fixation of the top cover assembly of the battery can be realized, the structure is simple, the number of parts is less, the thickness (also called height) of the top cover assembly of the battery is reduced, and the energy density of the battery is favorably improved; the material consumption is reduced, so that the cost is reduced; meanwhile, the first gasket 31 can be used for isolating and sealing the electrode 21 and the top cover plate 1, and the second gasket 32 can be used for isolating and sealing the fixing piece 22 and the top cover plate 1, so that a sealing ring is not required to be added, and the structure is further simplified; the first gasket 31 is arranged between the first rotation preventing part 211 and the second rotation preventing part 12, and the rotation preventing effect of the first rotation preventing part 211 and the second rotation preventing part 12 is further enhanced through the first gasket 31; the electrode 21 and the fixing piece 22 are welded through laser welding, and the processing efficiency is high, the stability is strong, and the cost is low.

Referring to fig. 10, a battery according to an embodiment of the present invention includes a housing 4 and the above-mentioned battery top cap assembly disposed on the housing 4. Between electrode 21 and the mounting 22 and between battery top cap subassembly and the shell 4 can adopt laser welding to realize sealing connection, and machining efficiency is higher than moulding plastics, and stability is strong, and is with low costs.

To sum up, compared with the traditional battery, the battery of the utility model adopts the top cover component, the electrode 21 and the fixing part 22 are together and electrically connected, and the first gasket 31, the top cover plate 1 and the second gasket 32 are pressed from both sides, so that the battery top cover component can be integrally fixed, the structure is simple, the number of parts is less, the height of the battery is reduced, and the energy density of the battery is favorably improved; the material consumption is reduced, so that the cost is reduced; meanwhile, the first gasket 31 can be used for isolating and sealing the electrode 21 and the top cover plate 1, and the second gasket 32 can be used for isolating and sealing the fixing piece 22 and the top cover plate 1, so that a sealing ring is not required to be added, and the structure is further simplified; the first gasket 31 is arranged between the first rotation preventing part 211 and the second rotation preventing part 12, and the rotation preventing effect of the first rotation preventing part 211 and the second rotation preventing part 12 is further enhanced through the first gasket 31; the electrode 21 and the fixing piece 22 are welded through laser welding, and the processing efficiency is high, the stability is strong, and the cost is low.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications, combinations, and variations may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides a battery top cap subassembly, characterized in that, includes top cover plate (1), electrode (21), mounting (22), first gasket (31) and second gasket (32), be equipped with first through-hole (311) on first gasket (31), be equipped with second through-hole (321) on second gasket (32), be equipped with third through-hole (11) on top cover plate (1), establish first gasket (31) electrode (21) with between top cover plate (1), establish second gasket (32) mounting (22) with between top cover plate (1), electrode (21) and/or mounting (22) wear to establish first through-hole (311), second through-hole (321) with in third through-hole (11), electrode (21) with mounting (22) are fixed together and electric connection, mounting (22) with top cover plate (1) compresses tightly from both sides first gasket (31), top cover plate (1) and second gasket (32), first gasket (31) and second gasket (31) seal up and seal up mounting (22) and second gasket (22) and seal up mounting (22).

2. The battery top cap assembly of claim 1, wherein one of the electrode (21) and the fixing member (22) comprises a base portion (23) and a connecting portion (24), and the connecting portion (24) is electrically connected to the other through the first through hole (311), the second through hole (321), and the third through hole (11).

3. The battery top cover assembly according to claim 2, wherein the first gasket (31) or the second gasket (32) is provided with a convex ring (33) which is convex along the thickness direction of the main body part, and the convex ring (33) surrounds the connecting part (24) and is positioned between the connecting part (24) and the top cover sheet (1) to isolate the base part (23) and the top cover sheet (1).

4. The battery top cap assembly of claim 1, wherein the securing member (22) is in the form of a sheet parallel to the top cap sheet (1).

5. The battery top cap assembly of claim 1, wherein a side of the second gasket (32) facing the fixing member (22) is provided with a recess (322) matching the fixing member (22), and the fixing member (22) is sunk into the recess (322).

6. The battery top cap assembly according to claim 1, wherein a side of the electrode (21) facing the first gasket (31) is provided with a first rotation preventing part (211) for preventing the electrode (21) from rotating, and the first rotation preventing part (211) is pressed against the first gasket (31).

7. The battery top cap assembly of claim 6, wherein the first anti-rotation portion (211) is rugged.

8. The battery top cover assembly according to claim 7, wherein a side of the top cover sheet (1) facing the electrode (21) is provided with a second rotation prevention part (12) for preventing the electrode (21) from rotating, the second rotation prevention part (12) corresponds to the first rotation prevention part (211) and is rugged, and the first gasket (31) is compressed between the first rotation prevention part (211) and the second rotation prevention part (12).

9. The battery top cap assembly of claim 8, wherein the electrode (21) and the fixture (22) are welded by laser welding.

10. A battery comprising a housing (4) and a battery top cap assembly according to any one of claims 1-9 disposed on said housing (4).