CN213752970U

CN213752970U - Gasket of cylindrical lithium battery

Info

Publication number: CN213752970U
Application number: CN202023015977.0U
Authority: CN
Inventors: 杨宪宝; 李锐辉
Original assignee: Zhangzhou Huarui Lithium New Energy Technology Co ltd
Current assignee: Zhangzhou Huarui Lithium New Energy Technology Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-07-20
Anticipated expiration: 2030-12-15

Abstract

The utility model discloses a gasket of cylinder type lithium cell, including battery case and annular baffle, battery case inner wall bottom fixedly connected with annular baffle, the battery case is inside to be equipped with the permeable formation gasket, permeable formation gasket bottom fixed mounting has the supporting layer gasket, and permeable formation gasket and the supporting layer gasket outside all closely contact with the battery case inner wall, supporting layer gasket bottom and annular baffle contact, the through-hole has been seted up to the equidistant inside of supporting layer gasket, the utmost point ear hole has been seted up to bottom one side of supporting layer gasket, the utility model discloses a composite construction that has utmost point ear hole guarantees the permeability of electrolyte, and foreign matter such as other metallic impurity is then filtered on the permeable formation, can not get into the roll core; guarantee simultaneously that the intensity of gasket passes through operation stop device, can realize that the gasket is whole to have certain stability after the installation, when other parts in the installation battery, be difficult for causing the skew to the gasket, be convenient for demolish the gasket is whole simultaneously.

Description

Gasket of cylindrical lithium battery

Technical Field

The utility model relates to a lithium cell technical field specifically is a gasket of cylinder type lithium cell.

Background

A lithium ion battery is a secondary battery (rechargeable battery) that mainly operates by movement of lithium ions between a positive electrode and a negative electrode. During charging and discharging, Li + is inserted and extracted back and forth between two electrodes: during charging, Li + is extracted from the positive electrode and is inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge.

The cylindrical lithium ion battery generally adopts a structure of a metal shell and a top cover, in order to prevent the anode and the cathode in a winding core from generating contact short circuit with the metal shell and the top cover, gaskets need to be placed on the winding core to play an insulation role, and the traditional gaskets are mostly of a single-layer structure, so that the insulating effect is not easily achieved, and the effect of preventing internal short circuit caused by the fact that impurities enter the inside of the winding core is achieved; in addition, conventional gaskets lack some stability after installation, which can easily cause the gasket to shift when other components of the battery are installed.

Therefore, we propose a gasket of a cylindrical lithium battery.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gasket of cylinder type lithium cell to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a gasket of cylinder type lithium cell, includes battery case and ring baffle, battery case inner wall bottom fixedly connected with ring baffle, the inside permeable formation gasket that is equipped with of battery case, permeable formation gasket bottom fixed mounting has the supporting layer gasket, and the permeable formation gasket and the supporting layer gasket outside all with battery case inner wall in close contact with, supporting layer gasket bottom and ring baffle contact, the through-hole has been seted up to the inside equidistance of supporting layer gasket, the utmost point ear hole has been seted up to bottom one side of supporting layer gasket, supporting layer gasket externally mounted has stop device.

Preferably, stop device includes mounting groove, mount pad, spacing groove, slider, spring shim, hemisphere type piece and hemisphere type groove, four mounting grooves have been seted up to supporting layer gasket outside equidistance, mounting groove inner wall fixedly connected with mount pad, the mount pad is made by insulating material, the spacing groove has been seted up to the mount pad inner wall, spacing inslot wall sliding connection has the slider, slider one side fixedly connected with spring shim, and one side and spring shim fixed connection that the slider was kept away from to spacing inslot wall, spring shim is made by the polytetrafluoroethylene material, one side fixedly connected with hemisphere type piece that spring shim was kept away from to the slider, battery case inner wall is close to the bottom equidistance and has seted up hemisphere type groove, and four hemisphere type pieces respectively with four hemisphere type groove joints.

Preferably, one side of the inner wall of the limit groove, which is far away from the spring gasket, is fixedly connected with a square frame, and the square frame is in contact with the hemispherical block.

Preferably, the bottom of the supporting layer gasket is fixedly connected with a bar-shaped knob, and the outer surface of the bar-shaped knob is fixedly connected with columnar bulges at equal intervals.

Preferably, the permeation layer gasket is made of a non-woven fabric material, and the support layer gasket is made of a polypropylene material.

Preferably, sealing rubber gaskets are arranged at the positions, in close contact with the battery shell, of the outer sides of the permeation layer gasket and the supporting layer gasket.

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

1. the utility model is a composite structure with the pole ear hole, the permeable layer gasket is provided with a porous permeable layer, the electrolyte and the gas can rapidly pass through the permeable layer, the permeability of the electrolyte is ensured, and foreign matters such as other metal impurities are filtered on the permeable layer and can not enter the winding core; the supporting layer gasket is a supporting layer with certain mechanical strength, and is provided with a small hole structure, so that the electrolyte can be ensured to flow smoothly, and the strength of the gasket is ensured.

2. Through operation stop device, can realize that the gasket is whole to have certain stability after the installation, when other parts in the installation battery, be difficult for causing the skew to the gasket, be convenient for wholly demolish the gasket simultaneously.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of a spacer structure of a support layer according to the present invention;

fig. 3 is a schematic sectional structural view of the battery case of the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 3;

FIG. 5 is a schematic cross-sectional view of the permeable layer gasket of the present invention;

FIG. 6 is a schematic cross-sectional view of a spacer layer of the present invention;

fig. 7 is a schematic structural view of the limiting device of the present invention.

In the figure: 1. a battery case; 2. an annular baffle; 3. a permeable layer gasket; 4. a support layer gasket; 5. a through hole; 6. a pole ear hole; 7. a limiting device; 71. mounting grooves; 72. a mounting seat; 73. a limiting groove; 74. A slider; 75. a spring washer; 76. a hemispherical block; 77. a hemispherical groove; 8. a square frame; 9. a bar-shaped knob; 10. and (4) columnar bulges.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, 2, 3, 5 and 6, a gasket for a cylindrical lithium battery in the figures includes a battery case 1 and a ring baffle 2, the ring baffle 2 is fixedly connected to the bottom of the inner wall of the battery case 1, a permeable layer gasket 3 is arranged inside the battery case 1, the permeable layer gasket 3 is a permeable layer with pores, electrolyte and gas can rapidly pass through the permeable layer to ensure the permeability of the electrolyte, foreign matters such as other metal impurities are filtered on the permeable layer and cannot enter a roll core, a supporting layer gasket 4 is fixedly installed at the bottom of the permeable layer gasket 3, the outer sides of the permeable layer gasket 3 and the supporting layer gasket 4 are both in close contact with the inner wall of the battery case 1, the bottom of the supporting layer gasket 4 is in contact with the ring baffle 2, and the ring baffle 2 can prevent the supporting layer gasket 4 from falling off after being installed at the bottom of the inner wall of the battery case 1, through-hole 5 has been seted up to the inside equidistance of supporting layer gasket 4, and supporting layer gasket 4 is for the supporting layer that has certain mechanical strength, and it has a plurality of through-hole 5 structures, can guarantee that electrolyte smoothly flows through, guarantees the intensity of gasket simultaneously, utmost point ear hole 6 has been seted up to bottom one side of supporting layer gasket 4, and the integrated gasket is for having the composite construction of utmost

point ear hole

6, 4 externally mounted of supporting layer gasket have stop device 7, realize spacing when installing the gasket through stop device 7.

Referring to fig. 1, 2, 3, 4, 6 and 7, the limiting device 7 includes a mounting groove 71, a mounting seat 72, a limiting groove 73, a sliding block 74, a spring washer 75, a hemispherical block 76 and a hemispherical groove 77, four mounting grooves 71 are equidistantly formed on the outer side of the support layer washer 4, the mounting seat 72 is fixedly connected to the inner wall of the mounting groove 71, the mounting seat 72 is made of an insulating material, the joint between the inner wall of the mounting groove 71 and the mounting seat 72 is closed to prevent the electrolyte and the gas from passing through the joint, the limiting groove 73 is formed on the inner wall of the mounting seat 72, the sliding block 74 is slidably connected to the inner wall of the limiting groove 73, the spring washer 75 is fixedly connected to one side of the sliding block 74, the side of the inner wall of the limiting groove 73 far from the sliding block 74 is fixedly connected to the spring washer 75, and the spring washer 75 is made of a polytetrafluoroethylene material, so that the spring washer 75 has good insulation, the mechanical strength is good, one side of the sliding block 74 far away from the spring gasket 75 is fixedly connected with hemispherical blocks 76, the inner wall of the battery shell 1 is provided with hemispherical grooves 77 at equal intervals near the bottom, the four hemispherical blocks 76 are respectively clamped with the four hemispherical grooves 77, when the gasket is integrally installed, the two permeation layer gaskets 3 and the supporting layer gasket 4 are simultaneously placed in the inner wall of the battery shell 1, so that the outer sides of the permeation layer gasket 3 and the supporting layer gasket 4 simultaneously slide with the inner wall of the battery shell 1, the spring gasket 75 is extruded, the hemispherical blocks 76 are extruded into the limiting groove 73, when the bottom of the supporting layer gasket 4 is contacted with the annular baffle 2, the hemispherical blocks 76 and the hemispherical grooves 77 are at the same horizontal height, the bottom of the supporting layer gasket 4 can be rotated to adjust, and therefore the four hemispherical blocks 76 and the four hemispherical grooves 77 are clamped in pairs, the installation process is completed, and the semi-spherical block 76 and the semi-spherical groove 77 are clamped, so that the supporting layer gasket 4 has certain stability, and when other elements in the battery are installed, the supporting layer gasket 4 is not easy to deviate, and the whole gasket is convenient to detach.

Referring to fig. 7, a square frame 8 is fixedly connected to a side of the inner wall of the limiting groove 73, which is far away from the spring gasket 75, and the square frame 8 contacts with the hemispherical block 76, so as to prevent the hemispherical block 76 from popping out of the limiting groove 73 in the mounting seat 72 due to the action of the spring gasket 75 when the supporting layer gasket 4 is not mounted, thereby avoiding influencing the subsequent mounting process.

Referring to fig. 2, the bottom of the supporting layer gasket 4 is fixedly connected with a bar-shaped knob 9, the outer surface of the bar-shaped knob 9 is fixedly connected with columnar protrusions 10 at equal intervals, the supporting layer gasket 4 can be conveniently adjusted in a rotating manner by rotating the bar-shaped knob 9, and the columnar protrusions 10 play a role in increasing friction force.

Referring to fig. 5 and 6, the permeation layer gasket 3 is made of non-woven fabric, so that the permeation layer gasket 3 has good permeation and filtration functions, and the support layer gasket 4 is made of polypropylene and has high mechanical strength.

Referring to fig. 2 and 3, sealing rubber gaskets are respectively installed at the tight contact positions of the outer sides of the permeation layer gasket 3 and the support layer gasket 4 and the battery case 1, so that the sealing performance of the contact positions of the permeation layer gasket 3 and the support layer gasket 4 and the battery case 1 is enhanced, and the electrolyte and other foreign metal impurities are prevented from penetrating through a gap between the gasket and the battery case 1.

The working principle is as follows: the permeable layer gasket 3 is a permeable layer with pores, electrolyte and gas can rapidly pass through the permeable layer, so that the permeability of the electrolyte is ensured, and foreign matters such as other metal impurities are filtered on the permeable layer and cannot enter the winding core; the supporting layer gasket 4 is a supporting layer with certain mechanical strength and is provided with a plurality of through holes 5, so that the electrolyte can flow smoothly, and the strength of the gasket can be ensured; the integral gasket is of a composite structure with a polar ear hole 6; the limiting device 7 is used for limiting the gasket during installation; when installing the gasket wholly, put into 1 inner wall of battery case simultaneously through inciting somebody to action two permeable formation gaskets 3 and supporting layer gasket 4, make the outside of permeable formation gasket 3 and supporting layer gasket 4 slide with 1 inner wall of battery case simultaneously, spring shim 75 receives the extrusion, hemisphere type piece 76 is extruded into inside the spacing groove 73, when supporting layer gasket 4 bottom and annular baffle 2 contact, hemisphere type piece 76 is in same level with hemisphere type groove 77, the rotatory supporting layer gasket 4 bottom of accessible is adjusted, thereby make four hemisphere type pieces 76 and four two liang of joints in hemisphere type groove 77, accomplish the installation.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a gasket of cylinder type lithium cell, includes battery case (1) and ring baffle (2), its characterized in that: battery case (1) inner wall bottom fixedly connected with ring baffle (2), battery case (1) inside is equipped with permeable formation gasket (3), permeable formation gasket (3) bottom fixed mounting has supporting layer gasket (4), and the permeable formation gasket (3) and the supporting layer gasket (4) outside all with battery case (1) inner wall in close contact with, supporting layer gasket (4) bottom and ring baffle (2) contact, through-hole (5) have been seted up to supporting layer gasket (4) inside equidistance, utmost point ear hole (6) have been seted up to bottom one side of supporting layer gasket (4), supporting layer gasket (4) externally mounted has stop device (7).

2. The gasket for a cylindrical lithium battery as claimed in claim 1, wherein: the limiting device (7) comprises a mounting groove (71), a mounting seat (72), a limiting groove (73), a sliding block (74), a spring gasket (75), a hemispherical block (76) and a hemispherical groove (77), wherein four mounting grooves (71) are formed in the outer side of the supporting layer gasket (4) at equal intervals, the mounting seat (72) is fixedly connected to the inner wall of the mounting groove (71), the mounting seat (72) is made of an insulating material, the limiting groove (73) is formed in the inner wall of the mounting seat (72), the sliding block (74) is connected to the inner wall of the limiting groove (73) in a sliding manner, the spring gasket (75) is fixedly connected to one side of the sliding block (74), one side of the inner wall of the limiting groove (73), which is far away from the sliding block (74), is fixedly connected with the hemispherical block (76), the spring gasket (75) is made of polytetrafluoroethylene, and one side of the sliding block (74), which is far away from the spring gasket (75), the battery shell (1) inner wall is close to the bottom equidistance and has been seted up hemisphere type groove (77), and four hemisphere type blocks (76) respectively with four hemisphere type grooves (77) joint.

3. The gasket for a cylindrical lithium battery as claimed in claim 2, wherein: one side of the inner wall of the limiting groove (73) far away from the spring gasket (75) is fixedly connected with a square frame (8), and the square frame (8) is in contact with the hemispherical block (76).

4. The gasket for a cylindrical lithium battery as claimed in claim 2, wherein: the bottom of the supporting layer gasket (4) is fixedly connected with a bar-shaped knob (9), and columnar bulges (10) are fixedly connected to the outer surface of the bar-shaped knob (9) at equal intervals.

5. The gasket for a cylindrical lithium battery as claimed in claim 4, wherein: the permeable layer gasket (3) is made of non-woven fabric, and the supporting layer gasket (4) is made of polypropylene.

6. The gasket for a cylindrical lithium battery as claimed in claim 5, wherein: and sealing rubber pads are arranged at the tight contact positions of the outer sides of the permeable layer gasket (3) and the supporting layer gasket (4) and the battery shell (1).