CN218472096U

CN218472096U - Bottom limit structure and secondary cylinder battery

Info

Publication number: CN218472096U
Application number: CN202221759309.5U
Authority: CN
Inventors: 何金磊; 赵艺惠; 张方超
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2022-07-08
Filing date: 2022-07-08
Publication date: 2023-02-10
Anticipated expiration: 2032-07-08

Abstract

The utility model relates to a bottom limit structure and secondary cylinder battery, bottom limit structure includes cylindrical shell (1) and sets up bottom (2) in shell (1) bottom, the inner wall of shell (1) near the bottom on be provided with boss (11) that are used for bottom (2) axial positioning, bottom (2) edge top butt boss (11), still be provided with on bottom (2) and be used for supporting the arch (21) of electric core; the secondary cylindrical battery comprises the bottom cover limiting structure. Compared with the prior art, the utility model has the advantages of efficient, with low costs does benefit to batch production.

Description

Bottom limit structure and secondary cylinder battery

Technical Field

The utility model relates to a cylinder battery technical field, concretely relates to bottom limit structure and secondary cylinder battery.

Background

The cylindrical battery is a battery with high capacity, long cycle life and wide temperature of use environment, and generally comprises a shell, a battery core and electrolyte contained in the shell, and a cap. The shell is generally a cylindrical groove body made of metal materials, the cap is connected with the notch of the shell in a positioning mode, and the cap and the shell are insulated and sealed through the sealing rubber ring, so that the integrity and the sealing performance of the shell are kept. However, the cylindrical battery bottom cover or the cylindrical battery shell is usually made of steel, a groove is difficult to manufacture for positioning, turning is adopted, the cost is high, the efficiency is low, and the horn mouth formed by using a mold is inaccurate in positioning.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a bottom limit structure and secondary cylinder battery, reduce cost raises the efficiency.

The purpose of the utility model can be realized through the following technical scheme: the utility model provides a bottom limit structure, includes cylindrical casing and sets up the bottom in the casing bottom, the casing be close to and be provided with the boss that is used for bottom axial positioning on the inner wall of bottom, bottom edge top butt boss still is provided with the arch that is used for supporting electric core on the bottom.

Preferably, the shell is a steel shell.

Preferably, the distance between the boss and the bottom of the shell is equal to the thickness of the bottom cover.

Preferably, the end part of the lug boss is of a spherical structure.

Preferably, the bottom cover is of a circular plate-shaped structure, and a plurality of protrusions are arranged at intervals on the top of the bottom cover.

A secondary cylindrical battery comprises the bottom cover limiting structure.

Preferably, the secondary cylindrical battery further comprises a central tube, a bare cell, a positive current collecting disc and a negative current collecting disc which are arranged in the shell; naked electric core ring establish on the center tube, positive pole current collecting disc and negative pole current collecting disc set up the upper and lower both sides at naked electric core respectively. Electrolyte is arranged in the battery.

Further preferably, the secondary cylindrical battery further comprises an anode post, the anode post is electrically connected with the bare cell through an anode current collecting disc, and the shell is electrically connected with the bare cell through a cathode current collecting disc.

Still further preferably, one end of the positive pole is located outside the casing, and the other end of the positive pole is located inside the casing and connected with the positive current collecting plate.

Still further preferably, the positive pole is fixed on the housing through a fixing disc, and positive pole upper plastic and positive pole lower plastic are arranged between the fixing disc and the housing.

Preferably, the fixed disk is arranged outside the positive pole in a surrounding mode, and the fixed disk is fixed on the shell through a clamping groove formed in the outer ring of the fixed disk in a surrounding mode.

Further preferably, plastic on the positive pole is arranged between the upper side of the clamping groove and the shell, and plastic under the positive pole is arranged between the lower side of the clamping groove and the shell.

Preferably, the fixed disk is a stainless steel fixed disk.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model can axially position the bottom cover through the design of the boss in the shell, thereby avoiding the arrangement of grooves, reducing the cost and improving the efficiency;

2. the shell of the utility model does not need mechanical processing, which is beneficial to reducing cost and improving efficiency, the boss is formed by laser dotting, and the utility model has the advantages of firmness, high efficiency, low cost and being beneficial to batch production;

3. the utility model uses the bulge to support the battery cell by the arrangement of the bulge structure on the bottom cover, increases the clearance between the bottom cover and the battery cell, further increases the infiltration speed of the electrolyte at the bottom of the battery, and can avoid the coating from reaching the bottom of the aluminum shell;

4. the utility model can improve the installation stability of the positive pole column on the shell through the arrangement of the fixed disk;

5. the utility model discloses a plastic and the setting of plastic under the positive pole on the positive pole can improve insulating nature, leakproofness and the stability of utmost point post installation.

Drawings

Fig. 1 is a schematic view of a bottom cover limiting structure of the present invention;

fig. 2 is a schematic structural view of the bottom cover of the present invention;

fig. 3 is a plan view of the secondary cylindrical battery of the present invention;

FIG. 4 isbase:Sub>A cross-sectional view taken along plane A-A of FIG. 3;

in the figure: 1-shell, 11-boss, 2-bottom cover, 21-bulge, 3-central tube, 4-naked electric core, 5-positive pole current collecting disc, 6-negative pole current collecting disc, 7-positive pole, 8-fixed disc, 9-positive pole upper plastic and 10-positive pole lower plastic.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The following examples are carried out on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following examples.

Example 1

The utility model provides a bottom limit structure, as shown in fig. 1-2, includes cylindrical casing 1 and sets up bottom 2 in casing 1 bottom, and casing 1 is provided with boss 11 on being close to the inner wall of bottom, and bottom 2 marginal top butt boss 11 for the axial positioning of bottom 2 still is provided with the arch 21 that is used for supporting electric core on the bottom 2.

In this embodiment, boss 11 is for utilizing laser to beat some formation in the position that casing 1 inner wall is close to the oral area, and casing 1 itself need not machining, is favorable to reduce cost and raises the efficiency, and laser beats boss 11 of formation of dotting firmly, and is efficient, and is with low costs, does benefit to batch production.

Example 2

A bottom cover limiting structure is characterized in that a bottom cover 2 is made into a non-porous structure, a bulge 21 is formed in the bottom cover, a battery cell is supported by the bulge 21, the gap between the bottom cover 2 and the battery cell is increased, the infiltration speed of electrolyte at the bottom of a battery is increased, and the bottom of an aluminum shell can be prevented from being coated.

Example 3

A secondary cylindrical battery, as shown in figures 3-4, comprises a shell 1, a bottom cover 2, a central tube 3, a bare cell 4, a positive current collecting disc 5, a negative current collecting disc 6, a positive pole 7, a fixed disc 8, positive pole upper plastic 9 and positive pole lower plastic 10.

Casing 1 is cylindrical box hat, and the bottom is provided with disc bottom 2, is provided with the boss 11 that is used for 2 axial positioning of bottom on casing 1 is close to the inner wall of bottom, 2 marginal top butt bosses 11 of bottom, still is provided with the arch 21 that is used for supporting electric core on the bottom 2. Center tube 3 sets up intermediate position in casing 1, and naked electric core 4 ring is established in the center tube 3 outside, and positive pole current collecting disc 5 and negative pole current collecting disc 6 set up respectively in the upper and lower both sides of naked electric core 4, and positive post 7 is connected with naked electric core 4 electric connection through positive current collecting disc 5, and one end is located the casing 1 outside, and the other end is located casing 1 inboard and is connected with positive current collecting disc 5, and casing 1 passes through negative pole current collecting disc 6 and naked electric core 4 electric connection.

The positive post 7 is fixed on the casing 1 through the fixed disk 8 that the ring was established in its outside, and the fixed disk 8 is fixed on the casing 1 through the draw-in groove of ring establishing in its outer lane, sets up plastic 9 on the positive pole between draw-in groove upside and the casing 1, sets up plastic 10 under the positive pole between draw-in groove downside and the casing 1.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.

Claims

1. The utility model provides a bottom limit structure, its characterized in that includes cylindrical casing (1) and sets up bottom (2) in casing (1) bottom, casing (1) be close to and be provided with boss (11) that are used for bottom (2) axial positioning on the inner wall of bottom, bottom (2) marginal top butt boss (11), still be provided with arch (21) that are used for supporting electric core on bottom (2).

2. The bottom cover limiting structure according to claim 1, wherein the distance between the boss (11) and the bottom of the shell (1) is equal to the thickness of the bottom cover (2).

3. The bottom cover limiting structure as claimed in claim 1, wherein the bottom cover (2) is a circular plate-shaped structure, and a plurality of protrusions (21) are arranged at intervals on the top.

4. A secondary cylindrical battery comprising the bottom cap limiting structure according to any one of claims 1 to 3.

5. The secondary cylindrical battery according to claim 4, further comprising a central tube (3), a bare cell (4), a positive current collecting plate (5) and a negative current collecting plate (6) disposed in the case (1); naked electric core (4) ring establish on center tube (3), positive pole current collecting disc (5) and negative pole current collecting disc (6) set up the upper and lower both sides at naked electric core (4) respectively.

6. The secondary cylindrical battery according to claim 5, further comprising a positive pole (7), wherein the positive pole (7) is electrically connected with the bare cell (4) through a positive current collecting plate (5), and the casing (1) is electrically connected with the bare cell (4) through a negative current collecting plate (6).

7. The secondary cylindrical battery according to claim 6, wherein one end of the positive pole (7) is located outside the case (1), and the other end is located inside the case (1) and connected with the positive current collecting plate (5).

8. The cylindrical secondary battery as claimed in claim 6, wherein the positive electrode post (7) is fixed on the case (1) by a fixing disk (8), and an upper plastic (9) and a lower plastic (10) are disposed between the fixing disk (8) and the case (1).

9. The secondary cylindrical battery according to claim 8, wherein the fixed disk (8) is arranged around the outer side of the positive pole (7), and the fixed disk (8) is fixed on the shell (1) through a clamping groove arranged around the outer ring of the fixed disk.

10. The secondary cylindrical battery according to claim 9, wherein an upper plastic (9) of the positive electrode is disposed between the upper side of the slot and the case (1), and a lower plastic (10) of the positive electrode is disposed between the lower side of the slot and the case (1).