CN218887334U

CN218887334U - Battery case assembly

Info

Publication number: CN218887334U
Application number: CN202222756833.3U
Authority: CN
Inventors: 杨建林; 周勤勇
Original assignee: Wuxi Jinyang New Material Co ltd
Current assignee: Wuxi Jinyang New Material Co ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-04-18
Anticipated expiration: 2032-10-19

Abstract

The utility model belongs to the technical field of batteries, and relates to a battery shell assembly, which comprises a shell, wherein the lower end of the shell is provided with an opening, the upper end of the shell is provided with an integrally connected end panel, the rotation center of the end panel is provided with a through hole, and the end panel is matched and connected with a sealing ring; the sealing washer is including the upper ring body, the lower floor's ring body that are parallel to each other and be used for connecting the sealing washer connecting portion of upper ring body and lower floor's ring body, the annular spacing portion of outside extension is followed to the upper end outside of upper ring body circle body coupling, and the both sides of end panel are arranged in with lower floor's ring body branch to the upper ring body, and the rivet is connected sealing washer and end panel riveting. The product of the utility model has reasonable and ingenious structure, the shell structure effectively reduces parts, and the reliability of the product is effectively improved while the production cost of the product is reduced; simultaneously the utility model discloses the sealed effect of product is better.

Description

Battery case assembly

Technical Field

The utility model belongs to the technical field of the battery, a battery case subassembly is related to.

Background

A lithium ion battery is a type of rechargeable battery that mainly relies on lithium ions moving between a positive electrode and a negative electrode to operate. During charging and discharging, li + is inserted and extracted back and forth between two electrodes: during charging, li + is extracted from the positive electrode and is inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. Because the lithium ion battery has the characteristics of small volume, light weight, strong electric quantity, environmental protection and the like, the lithium ion battery is widely applied to industrial production and daily life.

The battery case is an important component of the lithium battery, the existing battery case generally adopts a structure that the lower end is opened and the upper end is provided with a battery case cover plate, and the battery case is internally provided with components such as a battery core and the like. The structure has the problems that the structure of the cover plate of the battery case is complex, the related parts are more, the reliability of the battery in the working process is lower, and meanwhile, the production efficiency of products is lower due to more parts. The riveting problem exists in the course of working of current battery case, and the processing has the problem because the riveting mode is single to the battery of different length specifications, and production efficiency is low.

Disclosure of Invention

The utility model aims at the above problem, a battery case assembly is provided, and this subassembly structure is succinct, and the reliability is high.

According to the technical scheme of the utility model: the utility model provides a battery case assembly, includes the casing, the lower extreme of casing sets up opening, its characterized in that: the upper end of the shell is provided with an integrally connected end plate, the rotation center of the end plate is provided with a through hole, and the end plate is connected with a sealing ring in a matching way;

the sealing washer is including the upper ring body, the lower floor's ring body that are parallel to each other and be used for connecting the sealing washer connecting portion of upper ring body and lower floor's ring body, the annular spacing portion of outside extension is followed to the upper end outside of upper ring body circle body coupling, and the both sides of end panel are arranged in with lower floor's ring body branch to the upper ring body, and the rivet is connected sealing washer and end panel riveting.

As a further improvement of the utility model, the lower floor's circle body bottom surface sets up the annular, and the annular is located the outer lane of rivet, annular and the coaxial setting of perforating hole.

As a further improvement of the utility model, the rivet head of the rivet is matched and arranged at the inner side of the annular limiting part.

As a further improvement of the utility model, the radial outer end of the lower ring body extends to the inner wall of the shell.

As a further improvement of the utility model, the shell is constructed into a cylindrical barrel, and the joint of the end panel of the shell and the barrel part is set into circular arc transition.

The technical effects of the utility model reside in that: the product of the utility model has reasonable and ingenious structure, the shell structure effectively reduces parts, and the reliability of the product is effectively improved while the production cost of the product is reduced; simultaneously the utility model discloses the sealed effect of product is better.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 1.

Fig. 3 is a partial enlarged view of fig. 2 at I.

Fig. 4 is a schematic structural view of the present invention riveted from the inside of the housing.

Fig. 5 is a schematic structural view of the present invention riveted from the outside of the housing.

Fig. 6 is a schematic structural view of the present invention riveted from the inside and outside of the housing.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings.

Fig. 1~6 includes a rivet 1, a seal ring 2, an upper ring body 21, a lower ring body 22, a seal ring connecting portion 23, an annular stopper portion 24, an annular groove 25, a housing 3, an end plate 4, a through hole 5, and the like.

As shown in fig. 1 and 2, the utility model relates to a battery case assembly, this battery case assembly includes a cylindric casing 3, the lower extreme structure of casing 3 is open structure, the end panel 4 of the integrative connection of upper end structure of casing 3, the centre of gyration of end panel 4 sets up perforating hole 5, cooperation connection sealing washer 2 is gone up to perforating hole 5, sealing washer 2 is fixed in on end panel 4 through rivet 1 riveting, other battery pack such as electric core are installed to casing 3 in, in the battery use, rivet 1 constitutes the positive pole of battery, casing 3 forms the negative pole of battery. The end plate 4 forms a circular arc transition connection with the axial barrel part of the housing 3. The wall thickness of the housing 3 is preferably 0.4 mm.

In order to realize reliable sealing of the battery, the sealing ring 2 is configured to include an upper ring body 21 and a lower ring body 22 which are parallel to each other, the upper ring body 21 and the lower ring body 22 are respectively disposed at two sides of the end plate 4, wherein the upper ring body 21 is disposed at the outer side of the casing 3 and attached to the outer surface of the end plate 4, the lower ring body 22 is disposed in the casing 3 and attached to the inner bottom surface of the end plate 4, and the radial outer end of the lower ring body 22 extends to the inner wall of the casing 3. The upper ring body 21 and the lower ring body 22 are connected by a seal ring connecting portion 23, a radially outer end of the upper ring body 21 forms an annular limiting portion 24 extending radially, and an outer end of the rivet 1 is disposed in the annular limiting portion 24 in a matching manner.

Further, since the lower ring body 22 has a long radial extension length, when the seal ring 2 is riveted to the end plate 4 by the rivet 1, the middle portion of the lower ring body 22 directly contacts the rivet 1, and the edge of the lower ring body 22 is raised by a riveting force. In order to effectively avoid the problem that the edge of the lower ring body 22 is warped due to the action of the rivet 1, a ring groove 25 is formed in the outer ring of the lower ring body 22 corresponding to the rivet 1, and a buffer belt is formed through the ring groove 25, so that the problem that the edge of the lower ring body 22 is warped can be effectively avoided, and a reliable sealing effect is ensured. In particular production practice, the thickness of the annular groove 25 is preferably 0.3mm, and the thickness of the sealing ring 2 is preferably 0.5mm.

As shown in fig. 3, the utility model provides a cylinder barrel lower extreme opening position of casing 3 is provided with one section regional M that becomes the wall thickness, and this regional length is no longer than 0.5mm, and the thickness more than or equal to two-thirds of wall thickness of this regional lower extreme, and the internal diameter that becomes wall thickness regional M makes progress smooth transition from the lower extreme along the axial, and the lower extreme internal diameter is big, and the upper end internal diameter diminishes along the axial gradually.

The product of the utility model has reasonable and ingenious structure, effectively reduces parts compared with the existing battery shell structure, and has better sealing performance and high reliability; additionally, the utility model discloses the structure of product can follow 3 the inside riveting of casing when riveting sealing washer 2 and end panel 4 through rivet 1, also can follow 3 outsides of casing and rivet, can effectively make things convenient for processing.

As shown in figure 4, the utility model discloses the product is in production and processing process, to the shorter battery of 3 lengths of casing, can convenient and fast rivet from 3 insides of casing, this kind of riveting process convenient and fast. As shown in fig. 5, for the battery with the long housing 3, the riveting operation can be performed from the outside of the housing 3 to realize the convenient and fast processing operation. As shown in fig. 6, in some specific cases, a battery may be processed by performing a caulking operation from the inside and outside of the case at the same time.

Claims

1. A battery case assembly, includes casing (3), the lower extreme of casing (3) sets up the opening, its characterized in that: an integrally connected end plate (4) is arranged at the upper end of the shell (3), a through hole (5) is formed in the rotation center of the end plate (4), and a sealing ring (2) is connected to the end plate (4) in a matched mode;

sealing washer (2) are including the upper ring body (21), lower floor's ring body (22) that are parallel to each other and be used for connecting sealing washer connecting portion (23) of upper ring body (21) and lower floor's ring body (22), the upper end outside of upper ring body (21) encloses an organic whole and connects along the cyclic annular spacing portion (24) of the outside extension of axial, and the both sides of end panel (4) are arranged in respectively to upper ring body (21) and lower floor's ring body (22), and rivet (1) is connected sealing washer (2) and end panel (4) riveting.

2. The battery case assembly of claim 1, wherein: the bottom surface of the lower-layer ring body (22) is provided with an annular groove (25), the annular groove (25) is located on the outer ring of the rivet (1), and the annular groove (25) and the through hole (5) are coaxially arranged.

3. The battery case assembly of claim 1, wherein: the nail head of the rivet (1) is arranged on the inner side of the annular limiting part (24) in a matching way.

4. The battery case assembly of claim 1, wherein: the radial outer end of the lower ring body (22) extends to the inner wall of the shell (3).

5. The battery case assembly of claim 1, wherein: the shell (3) is constructed into a cylindrical barrel, and the joint of the end panel (4) of the shell (3) and the barrel is in circular arc transition.