CN218005151U

CN218005151U - Anti-bulging cylindrical battery

Info

Publication number: CN218005151U
Application number: CN202221981442.5U
Authority: CN
Inventors: 范叶平; 华春忠; 杨敏伟
Original assignee: Wuxi Mingyang New Energy Co ltd
Current assignee: Wuxi Mingyang New Energy Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-12-09
Anticipated expiration: 2032-07-29

Abstract

The utility model discloses a prevent bloated cylinder battery, including the casing that the bottom cavity internal fixation was provided with the battery core, the top of casing sets up the opening, and the opening is fixed to be set up the closure piece, sets up a plurality of through-hole on the closure piece, slides in the through-hole and sets up the closed post, and the outer wall setting of closed post is used for sealing the flange with through-hole inner wall cooperation confined. The utility model aims at providing a can in time exhaust gas prevent bulging cylinder battery.

Description

Anti-bulging cylindrical battery

Technical Field

The utility model relates to a battery technology especially relates to an anti-bulging cylinder battery.

Background

A lithium ion battery is a secondary battery (i.e., a battery used for repeated charging) that mainly operates by movement of lithium ions between a positive electrode and a negative electrode. During charging and discharging, lithium ions are intercalated and deintercalated between the two electrodes: during charging, lithium ions are extracted from the positive electrode and are inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; on the contrary, when discharged, lithium ions are extracted from the negative electrode and inserted into the positive electrode through the electrolyte, and the positive electrode is in a lithium-rich state. Since the lithium battery was invented, the technology of the lithium battery has been gradually matured after research and development for nearly 30 years. With the rising price of traditional fuels, new energy automobiles adopting lithium ion batteries as power sources are increasingly popular in the market, so that the application of the lithium ion batteries is increased explosively. Meanwhile, the safety of lithium ion batteries is also becoming more and more important.

In the use process of the existing lithium ion battery, along with the influence of a plurality of factors such as the increase of the number of charge-discharge cycles, long-time shelf and the like, trace hydrofluoric acid gas or other gases possibly generated in the battery can react, so that different degrees of swelling can be generated gradually and the swelling reaches the pressure bearing capacity, in order to release the internal pressure, the battery is broken to leak liquid slightly, and explodes and fires seriously, so that the serious loss of life and property can be brought to people possibly.

Disclosure of Invention

Utility model purpose: the utility model aims at providing a can in time exhaust gas prevent bulging cylinder battery.

The technical scheme is as follows: a prevent cylinder battery that expands, be provided with the casing of battery core including bottom cavity internal fixation, the top of casing sets up the opening, the fixed closed piece that sets up of opening, set up a plurality of through-hole on the closed piece, slide in the through-hole and set up the closed post, the outer wall setting of closed post is used for sealing the flange with through-hole inner wall cooperation confined.

Furthermore, the shell is fixedly provided with a wrapping ring at the top of the opening, and the edge of the closing sheet is fixedly connected with the wrapping ring.

Furthermore, a top cap is fixedly arranged above the sealing sheet, a plurality of exhaust holes are formed in the top cap, a spring used for resetting the sealing column is arranged between the top cap and the sealing column, and the upper end and the lower end of the spring are fixedly connected with the top cap and the sealing column respectively.

Further, the bottom of the closed column is provided with a bottom flange for increasing the contact surface with gas.

Further, an outer sealing ring is fixedly arranged on the inner wall of the through hole.

Further, the sealing flange is an inner sealing ring.

Furthermore, the top of the battery core is fixedly connected with the bottom end of the positive electrode lead-out piece, and the top end of the positive electrode lead-out piece is fixedly connected with the sealing piece.

Furthermore, a negative electrode lead-out piece is fixedly arranged at the bottom of the shell, the top end of the negative electrode lead-out piece is connected with the bottom of the battery core, and the bottom end of the negative electrode lead-out piece is connected with the bottom end of the shell.

Has the beneficial effects that: compared with the prior art, the utility model, have following advantage: when no gas exists in the battery, the sealing flange on the outer wall of the sealing column is matched and sealed with the inner wall of the through hole; when gas exists in the battery, the gas pushes the sealing column upwards, the sealing flange and the inner wall of the through hole cannot be matched with each other to form sealing, the gas in the shell can be discharged to the atmosphere to protect the shell from bulging, the spring pushes the sealing column to return to the original position after the gas is discharged, the original sealing state is formed, the battery can be continuously used, and the actions of exhausting and resetting can be repeatedly carried out. Compare the tradition and adopt the battery of disposable explosion-proof aluminum sheet or rupture membrane, can not used repeatedly after its pressure release, and the utility model discloses still can used repeatedly after the pressure release, avoid the waste of battery resource, make the contribution to the environmental protection.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

fig. 3 is an enlarged view of fig. 2 at B.

Wherein: 1. a cladding ring; 2. a sealing sheet; 201. a through hole; 202. an outer seal ring; 3. a top cap; 301. an exhaust hole; 4. a spring; 5. closing the column; 501. a bottom flange; 502. an inner seal ring; 6. a positive electrode lead-out sheet; 7. a battery cell; 8. and a negative electrode lead-out piece.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1 to 3, the anti-swelling cylindrical battery of the present invention includes a casing having a battery core 7 fixedly disposed in a bottom cavity, the top of the casing is provided with an opening, the casing is fixedly provided with a covering ring 1 at the top of the opening, the edge of a sealing sheet 2 is fixedly connected with the covering ring 1, the sealing sheet 2 is provided with a through hole 201, an outer sealing ring 202 is fixedly disposed on the inner wall of the through hole 201, a sealing post 5 is slidably disposed in the outer sealing ring 202, the bottom of the sealing post 5 is provided with a bottom flange 501 for increasing a contact surface with a gas, and the outer wall of the sealing post 5 is provided with an inner sealing ring 502 for cooperating with the outer sealing ring 202 to seal; a top cap 3 is fixedly arranged above the sealing sheet 2, a plurality of exhaust holes 301 are formed in the top cap 3, a spring for resetting the sealing column 5 is arranged between the top cap 3 and the sealing column 5, and the upper end and the lower end of the spring 4 are fixedly connected with the top cap 3 and the sealing column 5 respectively; the top of the battery core 7 is fixedly connected with the bottom end of the positive electrode lead-out piece 6, and the top end of the positive electrode lead-out piece 6 is fixedly connected with the sealing piece 2; the fixed negative pole of setting of the bottom of casing is drawn forth piece 8, and the top that the negative pole was drawn forth piece 8 is connected with the bottom of battery core 7, and the bottom that the negative pole was drawn forth piece 8 is connected with the casing bottom.

The above embodiments are merely illustrative of the preferred embodiments of the present invention, and those skilled in the art should be able to make various modifications and parameter changes without departing from the spirit of the present invention.

Claims

1. An anti-bulging cylindrical battery characterized in that: the battery pack is characterized in that a casing of a battery cell (7) is fixedly arranged in a cavity at the bottom, an opening is formed in the top of the casing, a sealing sheet (2) is fixedly arranged at the opening, a plurality of through holes (201) are formed in the sealing sheet (2), a sealing column (5) is arranged in the through holes (201) in a sliding mode, and a sealing flange matched and sealed with the inner walls of the through holes (201) is arranged on the outer wall of the sealing column (5).

2. The anti-bulging cylindrical battery according to claim 1, wherein: the shell is fixedly provided with a wrapping ring (1) at the top of the opening, and the edge of the closing sheet (2) is fixedly connected with the wrapping ring (1).

3. The anti-bulging cylindrical battery according to claim 1 or 2, characterized in that: the fixed top cap (3) that sets up in top of sealing piece (2), set up a plurality of exhaust hole (301) on top cap (3), set up spring (4) that are used for sealing post (5) and reset between top cap (3) and the closed post (5), the upper and lower both ends of spring (4) respectively with top cap (3) and closed post (5) fixed connection.

4. The anti-ballooning cylindrical battery of claim 1, wherein: the bottom of the closed column (5) is provided with a bottom flange (501) used for increasing the contact surface with gas.

5. The anti-bulging cylindrical battery according to claim 1, wherein: an outer sealing ring (202) is fixedly arranged on the inner wall of the through hole (201).

6. The anti-bulging cylindrical battery according to claim 1, wherein: the sealing flange is an inner sealing ring (502).

7. The anti-ballooning cylindrical battery of claim 1, wherein: the top of the battery core (7) is fixedly connected with the bottom end of the positive electrode leading-out piece (6), and the top end of the positive electrode leading-out piece (6) is fixedly connected with the sealing piece (2).

8. The anti-ballooning cylindrical battery of claim 1, wherein: and a negative lead-out piece (8) is fixedly arranged at the bottom of the shell, the top end of the negative lead-out piece (8) is connected with the bottom of the battery core (7), and the bottom end of the negative lead-out piece (8) is connected with the bottom end inside the shell.