CN212161864U

CN212161864U - Flange cylinder battery

Info

Publication number: CN212161864U
Application number: CN202020950877.8U
Authority: CN
Inventors: 曹振武; 曹锦东
Original assignee: Dongguan Baien Electronic Technology Co ltd
Current assignee: SHENZHEN BEIZEER ELECTRONICS Co.,Ltd.
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2020-12-15
Anticipated expiration: 2030-05-29

Abstract

The utility model discloses a flange cylinder battery mainly solves the problem that the battery that exists among the prior art takes place to warp easily and the weeping at the in-process that uses. The battery comprises a battery shell, a sealing member and a battery cover; the composite electrode body consisting of at least one positive plate, at least one negative plate and at least one isolating component is arranged in a sealed cavity formed by the battery shell, the sealing piece and the battery cover. The side wall of the battery case comprises a side wall lower section, a middle section and an upper section, wherein the diameter of the middle section is larger than that of the lower section and that of the upper section; the upper section of the battery shell is contracted inwards to provide an annular pressure belt, so that the pressure area between the battery cover and the sealing piece is increased, and the battery is prevented from deforming and leaking; the lower section of the battery shell is of a single-layer wall structure, so that the battery shell can be contracted inwards, and the volume of the battery is reduced; by the proposal, the utility model discloses reached and prevented deformation, weeping and more saved the purpose of volume, had very high practical value and spreading value.

Description

Flange cylinder battery

Technical Field

The utility model belongs to the technical field of the battery, specifically say, relate to a flange cylinder battery.

Background

The battery is widely applied in life, relates to electronic products such as mobile phones and the like, remote controllers, gas stoves and the like, and has a plurality of types including lead-acid storage batteries, UPS storage batteries, cylindrical batteries, button batteries and the like, wherein the button batteries are widely applied to various small-sized electronic products. Button cells, also known as button cells, are generally large in diameter, thin in thickness, and look like buttons. The button cell is small in appearance and regular in shape. The chemical button cell mainly comprises a cell positive electrode, a cell negative electrode, electrolyte and the like, wherein the cell positive shell and the cell negative shell are made of stainless steel materials, and a sealing part is arranged between the positive shell and the negative shell for sealing and insulating.

However, the button cell in the prior art is easy to deform and leak during use, and has a large volume, which affects the normal use and the use reliability of the cell. Although the problems of deformation and leakage are solved to a certain extent in a button cell shell structure, a button cell and an electric device (hereinafter referred to as a comparison document 1) of the chinese patent application No. 201811314209.X and a button cell (hereinafter referred to as a comparison document 2) of the chinese patent application No. 201610089695.4, the

comparison documents

1 and 2 have poor sealing contact stability, and the comparison document 2 has a large volume and affects installation. Therefore, how to solve the problems existing in the prior art is a problem which needs to be solved urgently by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flange cylinder battery mainly solves the battery that exists among the prior art and takes place the problem of deformation and weeping easily at the in-process that uses.

A flanged cylindrical battery, comprising:

a battery cover: one end of the battery cover is closed, and the other end of the battery cover is opened;

battery case: one end of the battery shell is closed, the other end of the battery shell is opened, and the battery cover and the battery shell are oppositely buckled and mounted;

the battery shell comprises a battery shell side wall lower section, a battery shell side wall middle section and a battery shell side wall upper section; the diameter of the middle section of the side wall of the battery shell is always larger than that of the lower section of the side wall of the battery shell, and is also always larger than that of the upper section of the side wall of the battery shell;

sealing element: the sealing element is arranged between the battery cover and the battery shell and plays a role in sealing and insulating;

the battery cover, the sealing element and the battery case form a closed inner cavity, and a composite electrode body formed by at least one positive plate, at least one negative plate and at least one isolation component is arranged in the inner cavity.

Further, the top of the lower section of the side wall of the battery shell extends outwards in the radial direction to form a flange structure with an axial cylindrical side wall; the flange structure comprises a battery shell side wall extension part which is connected with the lower section of the battery shell side wall and is of a platform structure, and an axial battery shell side wall middle section which is vertically fixed on the outer edge of the battery shell side wall extension part, wherein the ratio of the diameter of the side wall middle section on the outer side of the battery shell flange structure to the height of a battery body satisfies 1: 0.1-20.

Further, the distance between any one point of the side wall extension part of the battery shell and the platform area of the closed end of the battery shell is always not less than 0.1 mm. And a battery shell side wall inclined part for transition is arranged between the middle section of the battery shell side wall and the upper section of the battery shell side wall.

Further, the length of the upper section of the side wall of the battery shell is not less than 0.1 mm.

Further, the battery cover side wall comprises a battery cover side wall upper section and a battery cover side wall lower section.

Specifically, at least one surface of the positive plate is coated with a battery positive electrode material; at least one surface of the negative plate is coated with a battery negative material.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the utility model discloses the battery cover body is installed in the flange structure inner chamber of battery case, forms an airtight space with seal part, and the utility model discloses a battery case lateral wall upper segment reduces, presses to the battery cover lateral wall, and the slight deformation of battery cover lateral wall pressurized shrink forms an annular pressure area under the effect of sealing member to form and closely cooperate, for comparison file 1 and comparison file 2, the utility model discloses a leakproofness is better, has improved the reliability and the security of battery, thereby has guaranteed that the electrode body still can not warp and weeping under the pressure and the expanded circumstances in electric core.

(2) The utility model discloses a battery case lateral wall hypomere is for the inside shrink in flange structure lateral wall middle section, for the structure in the comparison file 2, the utility model discloses because the diameter of lateral wall hypomere is less than the diameter of flange structure, promptly the utility model discloses for the structure of comparison file 2, the lateral wall hypomere is single-layer wall structure, has reduced the holistic size of battery, and the required space that occupies is littleer, more easy to assemble.

Drawings

Fig. 1 is a schematic diagram of the system structure of the present invention.

Fig. 2 is a schematic view of the rotated structure of fig. 1.

Fig. 3 is a cross-sectional view of fig. 1A-a.

In the drawings, the names of the parts corresponding to the reference numerals are as follows:

1-battery case, 2-battery cover, 3-sealing member, 11-battery case side wall lower section, 12-battery case side wall extension, 13-battery case side wall middle section, 14-battery case side wall inclined section, 15-battery case side wall upper section, 21-battery cover side wall upper section, 22-battery cover side wall lower section, and 4-composite electrode body.

Detailed Description

The present invention will be further described with reference to the following drawings and examples, and embodiments of the present invention include, but are not limited to, the following examples.

Examples

As shown in fig. 1 to fig. 3, a flange cylindrical battery comprises a battery case 1, a sealing member 3 which is tightly attached to an inner wall port of the battery case 1, has sealing and insulating functions, and is formed by injection molding or hot press molding, and a battery cover 2 which is fastened on the battery case 1 and integrally sealed by the sealing member 3; the top of the lower section 11 of the side wall of the battery shell 1 extends outwards in the radial direction to form a flange structure with an axial cylindrical side wall; the flange structure comprises a battery shell side wall extension 12 connected with the battery shell side wall lower section 11, and an axial battery shell side wall middle section 13 vertically fixed on the outer edge of the battery shell side wall extension 12; the lower end of the battery case side wall middle section 13 is fixedly connected with the upper end of the battery case side wall middle section, the upper end of the battery case side wall inclined section 14 faces the inside of the accommodating cavity, and the battery case side wall upper section 15 is vertically fixed at the upper end of the battery case side wall inclined section 14, wherein the battery case side wall inclined section 14 and the battery case side wall upper section 15 are radially inwards converged, the diameter of the battery case side wall inclined section 14 and the diameter of the battery case side wall upper section 15 are smaller than the maximum diameter of the. Wherein the distance between any point of the side wall extension part 12 of the battery case and the platform area of the closed end of the battery case is always not less than 0.1 mm. Preferably, 0.5mm or more; distance is herein understood to be the distance from any point on the platform structure 12 to the point at which the closed end of the battery case is axially furthest away; the length of the upper section 15 of the side wall of the battery shell is not less than 0.1 mm. Preferably, it is 0.3mm or more. The side wall of the battery cover 2 comprises a battery cover side wall upper section 21 and a battery cover side wall lower section 22, and the diameter of the battery cover side wall lower section 22 is larger than that of the battery cover side wall upper section 21.

It should be noted that, in general, the composite electrode body 4 is electrically connected to the battery cover 2 to form a negative electrode terminal, the composite electrode body 4 is electrically connected to the battery case 1 to form a positive electrode terminal, at least one surface of the positive electrode terminal is coated with one or more positive electrode materials selected from lithium cobaltate, lithium iron phosphate, lithium manganate, lithium nickel cobalt manganate, and lithium nickel cobalt aluminate, and at least one surface of the negative electrode terminal is coated with one or more negative electrode materials selected from graphite, graphene, silicon carbon, lithium alloy, silicon oxide, lithium compound, and lithium titanate.

The sealing member 3 is fitted over the side wall of the battery cover 2, the composite electrode body 4 is placed in the battery cover 2, then the negative electrode end of the composite electrode body 4 is electrically connected to the battery cover 2 to facilitate electrical conduction, and the positive electrode end of the composite electrode body 4 is electrically connected to the battery can 1. The combined battery cover 2, sealing member 3 and composite electrode body 4 are tightly assembled in the battery shell 1, and the upper section 15 area of the battery shell side wall on the battery shell 1 is applied with a pressing force to be tightened and pressed to the battery cover side wall area, so that the corresponding position of the battery cover is subjected to shrinkage deformation to form an annular strip-shaped pressure area, and a sufficient binding force is generated, thereby the battery has sufficient tightness. Meanwhile, the upper section of the side wall of the battery cover shrinks during extrusion, so that the diameter of the upper section of the side wall of the battery cover is smaller than that of the lower section of the side wall of the battery cover, and the sealing element 3 is attached to the inner wall of the flange structure, so that the bearing capacity of the internal pressure of the battery in the axial direction is increased. And the shape of the battery case inclined portion 14 of the present invention is not limited to the oblique side in the drawings, and may be an arc shape.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "electrically connected," "disposed," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Through the research on the structure of the button cell in the prior art, the button cell is easy to deform and leak, and meanwhile, the button cell has a large relative volume due to the defects of the structural design.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not a limitation to the protection scope of the present invention, but all the changes made by adopting the design principle of the present invention and performing non-creative work on this basis should belong to the protection scope of the present invention.

Claims

1. A flanged cylindrical battery, comprising:

battery cover (2): one end of the battery cover is closed, and the other end of the battery cover is opened;

battery case (1): one end of the battery shell is closed, the other end of the battery shell is opened, and the battery cover and the battery shell are oppositely buckled and mounted;

the battery shell (1) comprises a battery shell side wall lower section (11), a battery shell side wall middle section (13) and a battery shell side wall upper section (15); the diameter of the middle section (13) of the side wall of the battery case is always larger than that of the lower section (11) of the side wall of the battery case, and is also always larger than that of the upper section (15) of the side wall of the battery case;

seal (3): the sealing element is arranged between the battery cover (2) and the battery shell (1) and plays a role in sealing and insulating;

the battery cover, the sealing element and the battery case form a closed inner cavity, and a composite electrode body (4) consisting of at least one positive plate, at least one negative plate and at least one isolating component is arranged in the inner cavity.

2. A flanged cylindrical battery according to claim 1, characterized in that the top of the lower section (11) of the side wall of the battery can (1) is extended radially outwards to form a flanged structure with an axial cylindrical side wall; the flange structure includes battery case lateral wall extension (12) that is connected and is the platform structure with battery case lateral wall hypomere (11), and one is vertically fixed axial battery case lateral wall middle section (13) along outside battery case lateral wall extension (12), wherein, the ratio of the diameter of the lateral wall middle section (13) in the battery case flange structure outside and the height of the battery body satisfies 1: 0.1-20.

3. A flanged cylindrical battery according to claim 2, characterized in that the distance between any point of the battery case side wall extension (12) and the closed end plateau region of the battery case is always not less than 0.1 mm.

4. A flanged cylindrical battery according to claim 1, wherein a transitional battery case side wall slope (14) is provided between the battery case side wall middle section (13) and the battery case side wall upper section (15).

5. A flanged cylindrical battery according to claim 1, characterized in that the length of the upper section (15) of the side wall of the battery case is not less than 0.1 mm.

6. A flanged cylindrical battery according to claim 1, characterized by the battery lid (2) side walls comprising a battery lid side wall upper section (21) and a battery lid side wall lower section (22).

7. The flanged cylindrical battery according to claim 1, wherein at least one side of the positive electrode sheet is coated with a battery positive electrode material; at least one surface of the negative plate is coated with a battery negative material.