CN219350438U

CN219350438U - Cylindrical battery cover plate structure

Info

Publication number: CN219350438U
Application number: CN202222985451.8U
Authority: CN
Inventors: 许飞; 赵永锋; 杲绍芒; 王昌权; 王震; 马红涛; 席鹏飞; 仲启方; 葛增乐; 王晓晓; 别深超; 刘统军
Original assignee: Guangxi Ningfu New Energy Technology Co ltd
Current assignee: Guangxi Ningfu New Energy Technology Co ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-07-14
Anticipated expiration: 2032-11-10

Abstract

The utility model discloses a cylindrical battery cover plate structure, which comprises a pole column, a positive electrode cover plate, a switching piece and an insulating sealing piece which is integrally formed between the positive electrode cover plate and the switching piece through injection molding; a welding boss is integrally formed at the top of the adapter plate, and a welding hole is formed in the center of the positive electrode cover plate; the welding boss passes through the welding hole and then is welded with the pole; the pole comprises a main body part and an extension part, wherein the main body part and the extension part are integrally formed, and a limit groove is formed in the periphery of the extension part; the utility model integrally forms the insulating sealing piece between the anode cover plate and the adapter plate through injection molding; the gap can be filled with plastic, so that the combination of the insulating sealing piece and the pole is firmer, and the sealing is more reliable.

Description

Cylindrical battery cover plate structure

Technical Field

The utility model relates to the field of battery cover plate structures, in particular to a cylindrical battery cover plate structure.

Background

Currently, a large cylindrical battery includes a case, an electrode assembly, and a cap plate assembly, taking a conventional large cylindrical battery as an example, the large cylindrical battery includes a case, an electrode assembly, a first cap plate assembly, and a second cap plate assembly; the casing provides a confined space to hold electrode assembly and electrolyte, and the electric energy of battery draws forth outside the confined space from the confined space through positive and negative pole post of positive and negative pole apron subassembly, in the current apron subassembly, the apron is the metal sheet and sets up the through-hole, sets up priming device and relief valve device on the apron.

In the prior art, the cover plate assembly has the defects of more parts, complex connection, low space utilization rate, complex process and certain potential safety hazard; therefore, there is a need for an optimized design of the cover assembly structure, which reduces the number of components of the cover assembly, simplifies the connection process, improves the space utilization and the connection reliability, so as to achieve the purpose of reducing the cost.

Disclosure of Invention

The utility model aims to provide a cylindrical battery cover plate structure.

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

a cylindrical battery cover plate structure comprises a pole column, a positive electrode cover plate, a switching piece and an insulating sealing piece which is integrally formed between the positive electrode cover plate and the switching piece through injection molding;

a welding boss is integrally formed at the top of the adapter plate, and a welding hole is formed in the center of the positive electrode cover plate; the welding boss passes through the welding hole and then is welded with the pole;

the pole comprises a main body part and an extension part, wherein the main body part and the extension part are integrally formed, and a limiting groove is formed in the periphery of the extension part.

Further, a welding groove is formed in the bottom of the extension portion, the welding boss is welded in the welding groove, and a top groove is formed in the top surface of the main body portion.

Further, the positive electrode cover plate is provided with a liquid injection hole.

Further, the liquid injection hole is fixedly connected with a sealing rubber plug and a sealing aluminum cap, and the top surface of the sealing aluminum cap is not higher than the top surface of the positive electrode cover plate.

Further, the positive electrode cover plate is rectangular or circular.

Further, the insulating sealing member comprises an upper insulating member and a lower insulating member, the upper insulating member is wrapped on the periphery of the pole, and the lower insulating member is arranged between the bottom surface of the positive electrode cover plate and the top surface of the adapter plate.

Further, a plurality of reinforcing ribs are distributed on the bottom surface of the lower insulating part, the reinforcing ribs and the bottom surface of the lower insulating part form a plurality of liquid injection cavities, liquid injection grooves are formed in the reinforcing ribs, and the liquid injection cavities are mutually communicated through the liquid injection grooves.

Further, the insulating sealing member is made of one or more of PP, PPS, PBT or PA, and glass fiber or carbon fiber is added into the insulating sealing member.

Compared with the prior art, the utility model has the advantages and positive effects that:

the utility model integrally forms the insulating sealing piece between the anode cover plate and the adapter plate through injection molding; the gap can be filled with plastic, so that the combination of the insulating sealing piece and the pole is firmer, and the sealing is more reliable.

The insulating sealing element adopts one or more of PP, PPS, PBT or PA; in order to prevent the expansion and contraction speed of the plastic from being higher than that of the metal, part of fibers (glass fibers or carbon fibers) are added, so that the expansion and contraction speed of the plastic is similar to that of the metal, and the phenomenon that the first cover plate or the pole is separated from the insulating sealing member in the cold and hot alternating environment in the later use process is reduced.

Drawings

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

FIG. 1 is a front cross-sectional view of the present utility model;

FIG. 2 is a block diagram of a pole of the present utility model;

fig. 3 is a bottom perspective view of the lower insulator of the present utility model.

In the figure: 1. a battery case; 2. a battery cell; 31. a positive electrode cover plate; 311. welding holes; 32. a pole; 321. a main body portion; 3211. a top groove; 322. an extension; 3221. a limit groove; 3222. a welding groove; 33. an insulating seal; 331. an upper insulating member; 332. a lower insulating member; 333. a liquid injection groove; 334. reinforcing ribs; 335. a liquid injection cavity; 34. a liquid injection hole; 341. sealing the aluminum cap; 342. sealing the rubber plug; 35. a transfer sheet; 351. welding the boss.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. 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, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present utility model; the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally coupled, 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.

As shown in figures 1-3 of the drawings,

a cylindrical battery cover plate structure is fixed at the opening of a battery shell 1, and a battery core 2 is fixedly connected inside the battery shell; the positive electrode cover plate 31, the adapter plate 35 and the insulating sealing member 33 are integrally formed between the positive electrode cover plate 31 and the adapter plate 35 through injection molding; the plastic can fill the gap, so that the combination of the insulating sealing member 33 and the pole 32 is more firm, and the sealing is more reliable.

The insulating sealing member 33 is made of one or more of PP, PPS, PBT or PA; in order to prevent the expansion and contraction speed of the plastic from being higher than that of the metal, part of fiber (glass fiber or carbon fiber) is added to enable the expansion and contraction of the plastic to be similar to that of the metal, thereby reducing the phenomenon that the first cover plate or pole is separated from the insulating sealing member 33 in the environment of alternating cold and hot in the later use process

A welding boss 351 is integrally formed at the top of the adapter plate 35, and a welding hole 311 is formed in the center of the positive electrode cover plate 31; the welding boss 351 passes through the welding hole 311 and is welded with the pole 32;

the pole 32 comprises a main body 321 and an extension 322, the main body 321 and the extension 322 are integrally formed, a limit groove 3221 is formed in the periphery of the extension 322, the insulation sealing element 33 after injection molding can be prevented from falling off through the limit groove 3221, and the connection between the insulation sealing element 33 and the pole 32 is reinforced, so that firm and non-loosening battery assembly is ensured.

In this embodiment, the bottom of the extension portion 322 is provided with a welding groove 32222, the welding boss 351 is welded in the welding groove 32222, and the top surface of the main body portion 321 is provided with a top groove 3211, so as to avoid the welding spot from affecting the serial-parallel connection of the batteries.

In this embodiment, the positive electrode cover plate 31 is provided with a liquid injection hole 34.

In this embodiment, the sealing rubber plug 342 and the sealing aluminum cap 341 are fixedly connected in the liquid injection hole 34, and the top surface of the sealing aluminum cap 341 is not higher than the top surface of the positive electrode cover plate 31.

In this embodiment, the positive electrode cover plate 31 is one of rectangular or circular.

In this embodiment, the insulating seal member 33 includes an upper insulating member 331 and a lower insulating member 332, the upper insulating member 331 is wrapped around the outer periphery of the pole 32, and the lower insulating member 332 is disposed between the bottom surface of the positive electrode cover plate 31 and the top surface of the adaptor tab 35.

In this embodiment, a plurality of reinforcing ribs 334 are distributed on the bottom surface of the lower insulating member 332, the reinforcing ribs 334 and the bottom surface of the lower insulating member 332 form a plurality of liquid injection chambers 335, liquid injection chambers 333 are formed on the reinforcing ribs 334, and the liquid injection chambers 335 are mutually communicated through the liquid injection chambers 333.

All other embodiments, modifications, equivalents, improvements, etc., which are apparent to those skilled in the art without the benefit of this disclosure, are intended to be included within the scope of this utility model.

Claims

1. A cylindrical battery cover plate structure is characterized in that: the insulation sealing piece is integrally formed between the positive electrode cover plate and the switching piece through injection molding;

2. The cylindrical battery cover plate structure according to claim 1, wherein: the bottom of extension has seted up the welding groove, welding boss welds in the welding groove, set up the top recess on the top surface of main part.

3. The cylindrical battery cover plate structure according to claim 1, wherein: and the positive electrode cover plate is provided with a liquid injection hole.

4. A cylindrical battery cover plate structure according to claim 3, wherein: the liquid injection hole is internally and fixedly connected with a sealing rubber plug and a sealing aluminum cap, and the top surface of the sealing aluminum cap is not higher than the top surface of the positive electrode cover plate.

5. The cylindrical battery cover plate structure according to claim 1, wherein: the positive electrode cover plate is rectangular or circular.

6. The cylindrical battery cover plate structure according to claim 1, wherein: the insulating sealing piece comprises an upper insulating piece and a lower insulating piece, wherein the upper insulating piece is wrapped on the periphery of the pole, and the lower insulating piece is arranged between the bottom surface of the positive electrode cover plate and the top surface of the switching piece.

7. The cylindrical battery cover plate structure according to claim 6, wherein: the bottom surface of the lower insulating part is provided with a plurality of reinforcing ribs, the reinforcing ribs and the bottom surface of the lower insulating part form a plurality of liquid injection cavities, liquid injection grooves are formed in the reinforcing ribs, and the liquid injection cavities are mutually communicated through the liquid injection grooves.