CN219610584U

CN219610584U - Lamination type button cell for improving longitudinal space utilization rate

Info

Publication number: CN219610584U
Application number: CN202320247235.5U
Authority: CN
Inventors: 陈喻斯
Original assignee: Guangdong Vdl New Energy Co ltd
Current assignee: Guangdong Vdl New Energy Co ltd
Priority date: 2023-02-18
Filing date: 2023-02-18
Publication date: 2023-08-29
Anticipated expiration: 2033-02-18

Abstract

The utility model discloses a laminated button cell for improving the utilization rate of longitudinal space, which comprises a shell, a cell arranged in the shell and an upper cover plate arranged at the top of the shell, wherein the cell comprises a positive plate, a diaphragm and a negative plate which are sequentially laminated, a first chord surface is arranged on the side wall of the shell, a liquid injection hole is formed in the first chord surface, a sealing steel sheet for sealing the liquid injection hole is welded at the liquid injection hole, and a second chord surface matched with the first chord surface of the shell in shape is arranged on the side wall of the cell; the utility model has safe and stable structure, effectively improves the energy density in the interior, has higher utilization rate of the longitudinal space in the interior and provides larger electric quantity.

Description

Lamination type button cell for improving longitudinal space utilization rate

Technical Field

The utility model relates to the technical field of batteries, in particular to a laminated button battery capable of improving the utilization rate of longitudinal space.

Background

With the increasing progress of electronic technology and the development of life intellectualization, portable electronic devices on the market are designed to be lighter and thinner for portability, and thus, it is also required that the laminated button cells for providing power are designed to be smaller and have larger energy density.

However, even if the laminated button cell is designed to be small, the size of the laminated button cell is limited by the specification classification, and therefore, in the laminated button cell with the same specification, since the structural design of the laminated button cell generally opens a small injection hole at the top positive surface or the bottom negative surface of the laminated button cell, and a sealing sheet is assembled after the injection, the structural design of the laminated button cell has the following defects: under the condition of longitudinal space limitation of the same specification and size, the sealing sheet structure increases the thickness of the laminated button cell, so that the lamination thickness of the battery core of the laminated button cell is reduced, and the laminated button cell is low in energy density and low in longitudinal space utilization rate.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide a laminated button cell for improving the utilization rate of a longitudinal space, and the energy density in the laminated button cell is effectively improved.

In order to achieve the above purpose, the utility model provides a laminated button cell for improving the utilization rate of longitudinal space, which comprises a shell, a cell arranged in the shell and an upper cover plate arranged at the top of the shell, wherein the cell comprises a positive plate, a diaphragm and a negative plate which are sequentially laminated, a first chord surface is arranged on the side wall of the shell, a liquid injection hole is formed in the first chord surface, a sealing steel sheet for sealing the liquid injection hole is welded at the liquid injection hole, and a second chord surface matched with the first chord surface of the shell in shape is arranged on the side wall of the cell.

Preferably, the upper cover plate comprises an outer end plate and a positive pole column arranged in the middle of the outer end plate and insulated from the outer end plate, and the positive pole column is electrically connected with the positive pole plate.

Preferably, the edge of the outer wall of the outer end piece is welded with the top of the shell into a whole.

Preferably, the side wall of the outer end piece is provided with a chord edge matched with the top of the first chord surface of the shell; wherein the chordal edge of the outer end piece is welded together with the top seal of the first chordal face of the housing.

Preferably, the outer end piece and the outer shell are both steel members.

Preferably, a hot melt adhesive layer for insulation is adhered between the outer end piece and the positive pole in the vertical direction; the hot melt adhesive layer is used for adhering the outer end piece and the positive pole together on one hand, and on the other hand, the outer end piece is insulated from the positive pole.

Preferably, a positive tab is arranged above the battery cell, and the positive tab is electrically connected with the positive post and the positive plate respectively.

Preferably, a negative electrode ear strip is arranged below the battery cell, and the negative electrode ear strip is respectively and electrically connected with the negative electrode sheet and the bottom of the shell.

Preferably, the liquid injection hole and the sealing steel sheet are both circular in shape.

Preferably, the circular area of the liquid injection hole is smaller than the circular area of the sealing steel sheet.

Compared with the prior art, the utility model has the beneficial effects that:

1. the first chord surface is arranged on the side wall of the shell, the transverse space of the laminated button cell is not increased, and the liquid injection hole is formed and the sealing steel sheet is welded, so that the longitudinal space structure of the laminated button cell is simpler, the thickness of the battery cell can be increased, namely the lamination number of the positive plate, the diaphragm and the negative plate of the battery cell is increased, and the energy density of the laminated button cell is increased.

2. The laminated button cell for improving the utilization rate of the longitudinal space provided by the utility model has the advantages that the structure is safe and stable, the energy density in the cell is effectively improved, the utilization rate of the longitudinal space in the cell is higher, and the provided electric quantity is larger.

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 required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an exploded view of a laminated button cell for improving the utilization of a longitudinal space according to an embodiment of the present utility model;

fig. 2 is a front cross-sectional view of a laminated button cell for improving the utilization of a longitudinal space according to an embodiment of the present utility model;

FIG. 3 is a front cross-sectional view of an upper covering sheet provided by an embodiment of the present utility model;

FIG. 4 is a front cross-sectional view of a positive post and a cell provided by an embodiment of the present utility model;

fig. 5 is a partial enlarged view of the letter a in fig. 2.

The drawings include:

1. a housing; 10. a first chord plane; 11. a liquid injection hole; 12. sealing steel sheet; 2. a battery cell; 20. a second chord plane; 21. a positive plate; 22. a diaphragm; 23. a negative electrode sheet; 24. positive electrode tab strips; 25. a negative electrode ear strip; 3. an upper cover plate; 30. a chord edge; 31. an outer end piece; 32. a hot melt adhesive layer; 33. and a positive electrode post.

Detailed Description

The technical solutions of the present embodiment of the present utility model will be clearly and completely described below with reference to the drawings in the present embodiment of the present utility model, and it is apparent that the described present embodiment is one embodiment of the present utility model, but not all the present embodiments. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

Referring to fig. 1 to 5, the embodiment of the utility model provides a laminated button cell for improving the utilization rate of longitudinal space, which comprises a housing 1, a cell 2 arranged in the housing 1 and an upper cover plate 3 arranged at the top of the housing 1, wherein the cell 2 comprises a positive plate 21, a diaphragm 22 and a negative plate 23 which are sequentially laminated, the upper cover plate 3 comprises an outer end piece 31 and a positive post 33 arranged in the middle of the outer end piece 31 and insulated from the outer end piece 31, the positive post 33 is electrically connected with the positive plate 21, the negative plate 23 is electrically connected with the bottom of the housing 1, the side wall of the housing 1 is provided with a first chord surface 10, a liquid injection hole 11 is formed in the first chord surface 10, a sealing steel sheet 12 for sealing the liquid injection hole 11 is welded at the position of the liquid injection hole 11, when the cell 2 is arranged in the housing 1, the second chord surface 20 of the cell 2 is attached to the first chord surface 10 of the housing 1, so that the cell 2 is arranged in the housing 1, the side wall of the cell 2 is arranged in the housing 1, the cell 2 is arranged in the middle of the housing 1, the positive post 33 is electrically connected with the positive post 33, the negative post 23 is electrically connected with the bottom of the housing 1, the side wall is provided with the first chord surface 31, the side wall 31 is arranged on the side wall of the housing 1, the side wall is welded with the first chord surface 10, and the top of the housing 1 is sealed, the side wall is sealed with the side wall is sealed, and the side of the top of the housing 1 is sealed, and the side is sealed with the side 31 is sealed, and the side of the top is sealed with the top chord 31 is sealed, and is sealed with the top side is sealed with the side 31.

As shown in fig. 2, a hot melt adhesive layer 32 for insulation is bonded between the outer end tab 31 and the positive electrode tab 33 in the vertical direction. The purpose of the hot melt adhesive layer 32 arrangement: first, for adhering the outer end piece 31 and the positive electrode post 33 together, ensuring the sealability between the outer end piece 31 and the positive electrode post 33, and second, insulating the outer end piece 31 from the positive electrode post 33.

A positive electrode lug 24 is arranged above the battery core 2, and the positive electrode lug 24 is respectively and electrically connected with the positive electrode post 33 and the positive electrode plate 21.

The negative electrode lug 25 is arranged below the battery cell 2, and the negative electrode lug 25 is respectively and electrically connected with the negative electrode piece 23 and the bottom of the shell 1.

The positive tab group formed by the positive tab strip 24 and the negative tab group formed by the negative tab strip 25 are respectively arranged at one side of the battery core 2, and the arrangement can also improve the longitudinal space utilization rate of the laminated button cell.

The liquid injection hole 11 and the sealing steel sheet 12 are circular in shape.

The circular area of the liquid injection hole 11 is smaller than the circular area of the sealing steel sheet 12.

The outer end piece 31 and the housing 1 are both steel members.

The top of the positive tab 24 is welded to the bottom of the positive post 33.

The bottom of the negative electrode lug is welded with the bottom of the shell 1.

According to the laminated button cell for improving the utilization rate of longitudinal space, the upper cover plate 3 is integrated by the outer end plate 31, the hot melt adhesive layer 32 and the positive pole 33, the edge of the upper cover plate 3 is welded with the top of the shell 1 into a whole, meanwhile, the cell 2 is arranged in the shell 1, electrolyte is poured onto the cell 2 through the liquid injection hole 11 of the side wall of the shell 1, and then the cell is sealed and arranged through the sealing steel sheet 12; the laminated button cell structure capable of improving the utilization rate of the longitudinal space is safe and stable, the energy density in the laminated button cell structure is effectively improved, the utilization rate of the longitudinal space in the laminated button cell structure is higher, and the provided electric quantity is larger.

The foregoing is only illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the utility model, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present utility model.

Claims

1. The utility model provides an improve lamination formula button cell of vertical space utilization, includes shell (1), installs at the inside electric core (2) of shell (1) and installs upper cover plate (3) at shell (1) top, electric core (2) are including positive plate (21), diaphragm (22) and negative plate (23) of laminating in proper order, a serial communication port, shell (1) lateral wall is equipped with first chord face (10), annotate liquid hole (11) have been seted up on first chord face (10), annotate liquid hole (11) department welding has sealed steel sheet (12) that are used for sealed annotating liquid hole (11), electric core (2) lateral wall be equipped with first chord face (10) shape assorted second chord face (20) of shell (1).

2. The laminated button cell for improving the utilization rate of the longitudinal space according to claim 1, wherein the upper cover plate (3) comprises an outer end plate (31) and a positive pole (33) arranged in the middle of the outer end plate (31) in an insulating manner with the outer end plate (31), and the positive pole (33) is electrically connected with the positive pole plate (21).

3. The laminated button cell for improving the utilization rate of the longitudinal space according to claim 2, wherein the edge of the outer wall of the outer end piece (31) is welded with the top of the casing (1) into a whole.

4. The laminated button cell with improved longitudinal space utilization according to claim 2, wherein the side wall of the outer end piece (31) is provided with a chord edge (30) matched with the top of the first chord surface (10) of the casing (1).

5. The laminated button cell for improving the utilization rate of the longitudinal space according to claim 2, wherein the outer end piece (31) and the outer shell (1) are steel material components.

6. A laminated button cell with improved longitudinal space utilization according to claim 2, characterized in that a hot melt adhesive layer (32) for insulation is bonded between the outer end piece (31) and the positive electrode post (33) in the vertical direction.

7. The laminated button cell for improving the utilization rate of the longitudinal space according to claim 2, wherein a positive tab (24) is arranged above the electric core (2), and the positive tab (24) is electrically connected with the positive post (33) and the positive plate (21) respectively.

8. The laminated button cell for improving the utilization rate of the longitudinal space according to claim 1, wherein a negative electrode lug (25) is arranged below the electric core (2), and the negative electrode lug (25) is electrically connected with the negative electrode piece (23) and the bottom of the shell (1) respectively.

9. The laminated button cell for improving the utilization rate of the longitudinal space according to claim 1, wherein the liquid injection holes (11) and the sealing steel sheets (12) are circular in shape.

10. The laminated button cell for improving the utilization rate of the longitudinal space according to claim 9, wherein the circular area of the liquid injection hole (11) is smaller than the circular area of the sealing steel sheet (12).