CN214753888U - Cylinder lithium cell electricity core - Google Patents

Abstract

The utility model discloses a cylindrical lithium battery cell, which comprises a cylindrical shell, a positive pole and a negative pole; openings are arranged at two end parts of the cylindrical shell, and the anode and the cathode are arranged corresponding to the openings at the two end parts; a sealing groove is formed in the opening of the cylindrical shell, and sealing convex strips are arranged on the outer surfaces of the anode and the cathode; after the opening is closed, the sealing convex strip is embedded into the sealing groove. The method mainly comprises the steps of improving the connection between a cylindrical shell and a positive electrode and a negative electrode; the structure of the sealing convex strips and the sealing grooves can improve the connection firmness between the anode and the cathode and the cylindrical shell, and can prevent the anode and the cathode from being separated from the cylindrical shell due to the action of tensile force, so that the service life of a lithium battery cell is prolonged; the electrolyte solution in the lithium battery cell is not easy to leak, and the sealing yield is improved.

Description

Cylinder lithium cell electricity core

Technical Field

The utility model belongs to the technical field of the lithium cell technique and specifically relates to indicate a cylinder lithium cell electricity core.

Background

With the popularization and development of mobile terminal devices. Lithium batteries have received increasing attention for their high capacity and high power performance. Conventionally, due to current collection problems, the lithium battery industry generally accepted that low capacity conventional batteries were produced using a small cylindrical process and high capacity or high power batteries were produced using a square lamination process.

However, the positive electrode and the negative electrode of the existing cylindrical lithium battery are not firmly connected, and the positive electrode and the negative electrode are separated under the action of the tension force, so that the overall service life of the lithium battery is short.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model discloses to the disappearance that prior art exists, its main objective provides a cylinder lithium cell electricity core, and its structure sets up rationally, solves current lithium cell effectively and has the not high problem of life.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a cylindrical lithium battery cell comprises a cylindrical shell, a positive electrode and a negative electrode; openings are formed in two end portions of the cylindrical shell, and the anode and the cathode are arranged corresponding to the openings in the two end portions; wherein

A sealing groove is formed in the opening of the cylindrical shell, and sealing convex strips are arranged on the outer surfaces of the anode and the cathode; after the opening is closed, the sealing convex strip is embedded into the sealing groove.

As a preferred embodiment: the sealing groove transversely extends and is arranged at the opening, and the sealing convex strip extends to extend and is arranged at the anode and the cathode.

As a preferred embodiment: the openings are arranged at the top and the bottom of the cylindrical shell, the anode is arranged in the opening at the top, and the cathode is arranged in the opening at the bottom.

As a preferred embodiment: the bottom of the sealing convex strip of the positive electrode is provided with a first inclined plane, and the bottom of the sealing groove corresponding to the opening at the top is provided with a second inclined plane;

the top of the sealing convex strip of the negative electrode is provided with a first inclined plane, and the top of the sealing groove corresponding to the opening at the bottom is provided with a second inclined plane.

As a preferred embodiment: the positive electrode and the negative electrode are embedded in the base, extend upwards to expose the upper surface of the base and extend downwards to expose the lower surface of the base.

As a preferred embodiment: the base comprises a disc and a substrate, and the substrate is vertically arranged in the center of the disc;

and the anode and the cathode are embedded in the base, extend upwards to expose the top of the substrate, and extend downwards to expose the bottom of the disc.

As a preferred embodiment: the sealing convex strips are arranged on the front side surface and the rear side surface of the substrate and extend left and right.

Compared with the prior art, the utility model obvious advantage and beneficial effect have, particularly, can know by above-mentioned technical scheme: the method mainly comprises the steps of improving the connection between a cylindrical shell and a positive electrode and a negative electrode; the structure of the sealing convex strips and the sealing grooves can improve the connection firmness between the anode and the cathode and the cylindrical shell, and can prevent the anode and the cathode from being separated from the cylindrical shell due to the action of tensile force, so that the service life of a lithium battery cell is prolonged; the electrolyte solution in the lithium battery cell is not easy to leak, and the sealing yield is improved;

secondly, the guiding function can be achieved by means of the arrangement of the first inclined surface and the second inclined surface; the smoothness and the reliability of the sealing convex strips embedded into the sealing grooves are facilitated, and the yield of the sealed lithium battery cell is further improved;

in addition, the base plate is arranged, the base plate can be grabbed by the aid of a manipulator, and then the disc is arranged in the lithium battery cell through the opening; further, the disk can further enhance the firmness of the positive electrode and the negative electrode after mounting.

To illustrate the structural features and functions of the present invention more clearly, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic perspective view of a lithium battery cell according to a preferred embodiment of the present invention;

FIG. 2 is a schematic partial structure view (positive electrode part) of the preferred embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic view of a portion of the structure of FIG. 2 at A;

FIG. 5 is a schematic view of a portion of the structure of FIG. 2 at A;

FIG. 6 is a schematic view of a partial structure (cathode portion) of a preferred embodiment of the present invention;

fig. 7 is a partially enlarged view of fig. 6 at B.

The attached drawings indicate the following:

10. cylindrical housing 11, opening

12. Seal groove 121, second inclined surface

20. Positive electrode 21 and sealing bead

22. First inclined surface 23, disc

24. A substrate 30 and a negative electrode.

Detailed Description

Referring to fig. 1 to 7, a specific structure of a preferred embodiment of the present invention is shown, which is a cylindrical lithium battery cell, including a cylindrical housing 10, an anode 20 and a cathode 30.

The cylindrical case 10 has openings 11 formed at both ends thereof, and the positive electrode 20 and the negative electrode 30 are disposed corresponding to the openings 11 formed at both ends thereof. In the embodiment of the present application, the cylindrical housing 10 is provided with a sealing groove 12 at the opening 11, and the outer surfaces of the positive electrode 20 and the negative electrode 30 are provided with sealing ribs 21; after the opening 11 is closed, the sealing rib 21 is inserted into the sealing groove 12. Specifically, by the arrangement of the sealing convex strip 21 and the sealing groove 12, when the opening 11 of the cylindrical shell 10 is sealed, the sealing convex strip 21 can be inserted into the sealing groove 12 for connection; on one hand, the firmness of the connection between the anode 20 and the cathode 30 and the cylindrical shell 10 can be improved, and the anode 20 and the cathode 30 can be prevented from being separated from the cylindrical shell 10 due to the action of tensile force, so that the service life of a lithium battery cell is prolonged; on the other hand, the electrolyte solution in the lithium battery cell is not easy to leak, and the sealing yield is improved. Compared with the mode of welding the anode 20 and the cathode 30 by electric welding, the assembling process can be simplified, and the production efficiency of the lithium battery cell is improved.

The openings 11 are arranged at the top and the bottom of the cylindrical shell 10, the anode 20 is arranged in the opening 11 at the top, and the cathode 30 is arranged in the opening 11 at the bottom; in the embodiment of the application, the sealing groove 12 extends transversely to be arranged at the opening 11, and the sealing convex strip 21 extends towards to be arranged at the anode 20 and the cathode 30; the length of the sealing rib 21 is the same as the length of the sealing groove 12, and it can be understood that the sealing rib 21 is adapted to the sealing groove 12. Preferably, the bottom of the sealing protrusion 21 of the positive electrode 20 is provided with a first inclined surface 22, and the bottom of the sealing groove 12 corresponding to the top opening 11 is provided with a second inclined surface 121; the top of the sealing protrusion 21 of the negative electrode 30 is provided with a first inclined surface 22, and the top of the sealing groove 12 corresponding to the opening 11 at the bottom is provided with a second inclined surface 121. The cylindrical shell 10 can achieve the guiding function by means of the arrangement of the first inclined surface 22 and the second inclined surface 121 in the process of sealing; the smoothness and the reliability of the sealing convex strips 21 embedded in the sealing grooves 12 are facilitated, and the yield of the lithium battery cell after sealing is further improved.

The anode 20 and the cathode 30 are both embedded in the base and extend upwards to expose the upper surface of the base and extend downwards to expose the lower surface of the base; specifically, the susceptor includes a disk 23 and a base plate 24, the base plate 24 being vertically disposed at the center of the disk 23; the anode 20 and the cathode 30 are embedded in the base, extend upwards to expose the top of the substrate 24, and extend downwards to expose the bottom of the disc 23; by arranging the base, the installation between the positive electrode 20 and the negative electrode 30 can be more convenient; if the assembly is carried out by adopting automatic equipment, the substrate 24 can be grabbed by the manipulator and then the disc 23 is arranged in the lithium battery cell through the opening 11; further, the disk 23 can further enhance the firmness of the positive electrode 20 and the negative electrode 30 after mounting. The seal beads 21 are preferably provided on both front and rear side surfaces of the base plate 24 and extend in the left-right direction.

The utility model discloses a design focus lies in: mainly, the connection between the cylindrical shell 10 and the anode 20 and the cathode 30 is improved; the structure of the sealing convex strip 21 and the sealing groove 12 can improve the connection firmness between the anode 20 and the cathode 30 and the cylindrical shell 10, and can prevent the anode 20 and the cathode 30 from being separated from the cylindrical shell 10 due to the action of tensile force, so that the service life of the lithium battery cell is prolonged; the electrolyte solution in the lithium battery cell is not easy to leak, and the sealing yield is improved;

secondly, the guiding function can be achieved by the arrangement of the first inclined surface 22 and the second inclined surface 121; the smoothness and the reliability of the sealing convex strips 21 embedded in the sealing grooves 12 are facilitated, and the yield of the sealed lithium battery cell is further improved;

additionally, a substrate 24 is provided, which can be grasped by a manipulator and then the disc 23 is mounted inside the lithium battery cell through the opening 11; further, the disk 23 can further enhance the firmness of the positive electrode 20 and the negative electrode 30 after mounting.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", 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 in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.

Claims (7)

1. The utility model provides a cylinder lithium cell electricity core which characterized in that: comprises a cylindrical shell, a positive electrode and a negative electrode; openings are formed in two end portions of the cylindrical shell, and the anode and the cathode are arranged corresponding to the openings in the two end portions; wherein:

a sealing groove is formed in the opening of the cylindrical shell, and sealing convex strips are arranged on the outer surfaces of the anode and the cathode; after the opening is closed, the sealing convex strip is embedded into the sealing groove.

2. The cylindrical lithium battery cell of claim 1, characterized in that: the sealing groove transversely extends and is arranged at the opening, and the sealing convex strip extends to extend and is arranged at the anode and the cathode.

3. The cylindrical lithium battery cell of claim 2, characterized in that: the openings are arranged at the top and the bottom of the cylindrical shell, the anode is arranged in the opening at the top, and the cathode is arranged in the opening at the bottom.

4. The cylindrical lithium battery cell of claim 3, characterized in that: the bottom of the sealing convex strip of the positive electrode is provided with a first inclined plane, and the bottom of the sealing groove corresponding to the opening at the top is provided with a second inclined plane;

the top of the sealing convex strip of the negative electrode is provided with a first inclined plane, and the top of the sealing groove corresponding to the opening at the bottom is provided with a second inclined plane.

5. The cylindrical lithium battery cell of claim 4, characterized in that: the positive electrode and the negative electrode are embedded in the base, extend upwards to expose the upper surface of the base and extend downwards to expose the lower surface of the base.

6. The cylindrical lithium battery cell of claim 5, characterized in that: the base comprises a disc and a substrate, and the substrate is vertically arranged in the center of the disc;

and the anode and the cathode are embedded in the base, extend upwards to expose the top of the substrate, and extend downwards to expose the bottom of the disc.

7. The cylindrical lithium battery cell of claim 6, characterized in that: the sealing convex strips are arranged on the front side surface and the rear side surface of the substrate and extend left and right.

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