CN216872222U

CN216872222U - Lithium battery cover plate annotate liquid hole sealing structure

Info

Publication number: CN216872222U
Application number: CN202123289503.XU
Authority: CN
Inventors: 张飞龙; 曹峰; 魏家兴; 张春艳; 徐娟
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Hefei Gotion High Tech Power Energy Co Ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-07-01
Anticipated expiration: 2031-12-24

Abstract

The utility model discloses a sealing structure of a liquid injection hole of a lithium battery cover plate, which comprises a cover plate body, a plugging piece, a rotating rod, a transmission mechanism, an extension rod and a shell, wherein: the cover plate body is provided with a liquid injection hole, and the blocking piece is detachably arranged in the liquid injection hole; the extension rod is vertically and slidably mounted on the plugging piece, the lower end of the extension rod extends out of the plugging piece, and the shell is fixed below the extension rod; the rotating rod is transversely and rotatably arranged on the shell and is rotated to be clamped on the cover plate body; drive mechanism establishes between extension rod and dwang, and the extension rod vertical movement in-process drives the driving plate through drive mechanism and rotates. According to the sealing structure of the liquid injection hole of the lithium battery cover plate, the sealing element is convenient to detach on the premise of ensuring the sealing effect.

Description

Lithium battery cover plate annotate liquid hole sealing structure

Technical Field

The utility model relates to the technical field of lithium battery liquid injection hole sealing devices, in particular to a liquid injection hole sealing structure of a lithium battery cover plate.

Background

The lithium battery is a battery which uses lithium metal or lithium alloy as a positive/negative electrode material and uses a non-aqueous electrolyte solution, the liquid injection and sealing of the lithium battery are important processes in the post-manufacturing process of the battery, for example, fig. 1 shows a common cover plate structure of the lithium battery, the two ends of the common cover plate structure are respectively a positive electrode and a negative electrode, a liquid injection hole and an explosion-proof valve are arranged between the positive electrode and the negative electrode, the liquid injection and sealing of the lithium battery basically adopt direct hole opening on the cover plate for liquid injection, and after the liquid injection and sealing, the liquid injection and sealing are usually carried out by steel ball extrusion dispensing and prototype aluminum sheet welding.

However, the traditional steel ball extrusion dispensing sealing and the steel ball extrusion dispensing sealing operation process of the prototype aluminum sheet welding in the using process are complicated and low in efficiency, the steel ball is easy to burst out, and the explosion point generated in the prototype aluminum sheet welding easily causes scrapping of the battery, and the stability is low.

Therefore, it is necessary to provide a new sealing structure for a liquid filling hole of a lithium battery cover plate to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems in the background art, the utility model provides a sealing structure of a liquid injection hole of a lithium battery cover plate.

The utility model provides a liquid injection hole sealing structure of a lithium battery cover plate, which comprises a cover plate body, a plugging part, a rotating rod, a transmission mechanism, an extension rod and a shell, wherein:

the cover plate body is provided with a liquid injection hole, the blocking piece is detachably arranged in the liquid injection hole, the blocking piece can be a bolt in the prior art, and is fixed in the liquid injection hole in a threaded mode or can be a clamping column clamped in the liquid injection hole;

the extension rod is vertically and slidably mounted on the plugging piece, the lower end of the extension rod extends out of the plugging piece, and the shell is fixed below the extension rod;

the rotating rod is transversely and rotatably arranged on the shell, the rotating rod is rotated to be clamped on the cover plate body or to be clamped along the length direction of the blocking piece, so that the blocking piece is convenient to take out;

drive mechanism establishes between extension rod and dwang, and the extension rod vertical movement in-process drives the driving plate through drive mechanism and rotates, drives the dwang through vertical removal extension rod and rotates the bottom conflict or the separation that makes dwang and apron body and then realize being convenient for further fix or take out stifled plug member to the plug member.

In order to further realize the fixation of the blocking piece, the blocking piece fixing device further comprises a limiting block, wherein the limiting block is fixed at one end of the rotating rod, which is far away from the blocking piece, the bottom of the cover plate body is provided with a limiting groove, and the limiting block is in sliding connection with the limiting groove.

As a further optimized scheme of the utility model, the two rotating rods are arranged oppositely, so that the efficiency of fixing the blocking piece is further increased.

In order to increase the sealing effect, as a further optimized scheme of the utility model, the liquid injection hole is a T-shaped hole, and the liquid injection device further comprises a sealing gasket which is sleeved on the plugging piece and is positioned on the step surface of the T-shaped hole.

As a further optimized scheme of the utility model, the sealing device further comprises a sealing cover, wherein the sealing cover is detachably arranged on the cover plate body and is positioned above the liquid injection hole, so that the blocking piece is protected conveniently, the blocking piece is prevented from being oxidized due to long-time contact with air, and the sealing effect is further ensured.

As a further optimized scheme of the utility model, a sealing ring is arranged below the sealing cover and is abutted against the upper surface of the cover plate body, so that the sealing effect is improved.

As a further optimized scheme of the utility model, the sealing cover is detachably mounted on the cover plate body through a fixing piece, the fixing piece can be a screw or a fixing pin in the prior art, and in order to avoid the loss of the sealing cover in the process of detaching the sealing cover, the sealing cover can be rotatably mounted on the cover plate body.

In order to move the extension rod conveniently, the novel extension rod further comprises a threaded rod, the threaded rod is rotatably installed on the cover plate body, the lower end of the threaded rod is connected with the extension rod in a threaded mode, and the threaded rod is rotated to drive the extension rod to slide in the vertical direction.

In some embodiments, the device further comprises a rotating shaft, the rotating shaft is transversely and rotatably mounted on the housing, the rotating shaft is rotated around a rotating axis perpendicular to an axis of the housing, the transmission mechanism comprises a first transmission mechanism and a second transmission mechanism, the first transmission mechanism is arranged between the rotating shaft and the rotating shaft, the rotating shaft drives the rotating shaft to rotate through the rotation of the first transmission mechanism, the second transmission mechanism is arranged between the rotating shaft and the threaded rod or the extension rod, the second transmission mechanism is used for driving the rotating shaft to rotate, when the second transmission mechanism is arranged between the threaded rod and the rotating shaft, the rotating shaft can be driven to rotate by the rotation of the threaded rod, so the second rotating mechanism can be a worm gear and worm transmission mechanism or a bevel gear transmission mechanism, when the second transmission mechanism is arranged between the extension rod and the rotating shaft, the extension rod moves downwards to drive the rotating shaft to rotate, and the second transmission mechanism can be a gear rack transmission mechanism.

The first transmission mechanism drives the two rotating parts with vertical rotating axes to rotate, so that the first transmission mechanism can be a bevel gear transmission mechanism and can also be other transmission mechanisms.

According to the sealing structure for the liquid injection hole of the lithium battery cover plate, the liquid injection hole can be detachably sealed through the sealing piece, the sealing piece is reinforced when the liquid injection hole is sealed through the rotating rod, the sealing effect is prevented from being influenced by the movement of the sealing piece relative to the liquid injection hole, and the sealing piece is convenient to detach on the premise of ensuring the sealing effect.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a schematic view of a prior art cover plate structure;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a cross-sectional view of the limiting block and the limiting groove of the present invention.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar designations denote like elements or elements having like or similar functionality throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in fig. 2-3, the sealing structure for the electrolyte filling hole of the lithium battery cover plate comprises: a cover plate body 1; the liquid injection hole 2 is formed in the top of the cover plate body 1; the bolt 3 is installed in the liquid injection hole 2 in a threaded mode; the sealing gasket 4 is a T-shaped hole, the sealing gasket 4 is movably sleeved on the bolt 3, and the sealing gasket 4 is movably connected with the part of the inner wall with larger inner diameter above the liquid injection hole 2; the sliding groove 5 is formed in the bottom of the bolt 3; the extension rod 6 is vertically and slidably mounted on the inner wall of the sliding groove 5, and the bottom end of the extension rod 6 extends out of the sliding groove 5; when the mutual sliding grooves 5 of the extension rods 6 move to the uppermost end, namely the extension rods 6 seal the tops of the sliding grooves 5, the shell 7 is fixedly arranged at the bottom end of the extension rods 6; the two rotating rods 8 are symmetrically and transversely arranged on the inner wall of the shell 7 in a rotating mode; the two limiting grooves 9 are symmetrically formed in the bottom of the cover plate body 1; the limiting block 10 is fixedly arranged on the rotating rod 8, and the limiting block 10 is movably connected with the inner wall of the limiting groove 9;

the sealing cover 11 is rotatably arranged at the top of the cover plate body 1; the sealing ring 12 is fixedly arranged at the bottom of the sealing cover 11, and the sealing ring 12 is movably connected with the cover plate body 1 in a sealing way; and the screw 13 is installed on the sealing cover 11 in a threaded manner, and the screw 13 is in threaded connection with the cover plate body 1.

The inner wall of the liquid injection hole 2 is provided with threads, and the bolt 3 is matched with the threads.

Fixed mounting has first worm wheel 14 on dwang 8, transversely rotate in the casing 7 and install first worm 15, first worm 15 and the meshing of first worm wheel 14.

Rotate on the top inner wall of casing 7 and install second worm 16, fixed cover is equipped with second worm wheel 17 on the first worm 15, second worm 16 and the meshing of second worm wheel 17.

The top inner wall of the sliding groove 5 is rotatably provided with a threaded rod 18, the threaded rod 18 is a screw rod, the threaded rod 18 is connected with the extension rod 6 in a threaded mode, the threaded rod 18 is rotated to drive the extension rod 6 to vertically slide, the top end of the second worm 16 extends out of the shell 7, the second worm 16 is fixedly connected with the threaded rod 18, the threaded rod 18 is rotated to drive the second worm 16 to rotate, specifically, the bottom of the threaded rod 18 is provided with a connecting groove which is arranged on a rotating shaft together with the second worm 16, the rotating shaft extends into the connecting groove, the side wall of the connecting groove is provided with a sliding groove along the axial direction of the threaded rod 18, the top of the rotating shaft is provided with a connecting rod along the radial direction of the connecting rod, the connecting rod is connected with the sliding groove in a sliding mode, and is connected with the sliding groove through the connecting rod, so that the threaded rod 18 rotates to drive the second worm 16 to rotate, and the second worm 16 vertically moves along with the shell and the extension rod 6 relative to the threaded rod 18, the top end of the threaded rod 18 extends out of the sliding groove 5, the threaded rod 18 is rotatably connected with the bolt 3, and in order to increase the sealing property, an elastic sealing ring or an elastic sealing cover can be additionally arranged at the joint of the threaded rod 18 and the bolt 3;

two lugs are symmetrically and fixedly mounted on the extension rod 6, two grooves are symmetrically formed in the inner wall of the sliding groove 5, and the lugs are connected with the inner walls of the corresponding grooves in a sliding mode.

The working principle of the sealing structure of the liquid injection hole of the lithium battery cover plate provided by the utility model is as follows:

when in use, the sealing gasket 4 is sleeved on the bolt 3, and the bolt 3 is arranged in the liquid injection hole 2, so that the operation process is simple, the efficiency is high, and the liquid injection hole is not easy to spray out; screwing the threaded rod 18 to drive the extension rod 6 to vertically move, so that the extension rod 6 drives the shell 7 to move conveniently; meanwhile, the threaded rod 18 drives the second worm 16 to rotate, the second worm 16 drives the second worm wheel 17 to rotate, the second worm wheel 17 drives the first worm 15 to rotate, the first worm 15 drives the first worm wheel 14 to rotate, the first worm wheel 14 drives the rotating rod 8 to rotate, and the rotating rod 8 drives the limiting block 10 to rotate, so that the limiting block 10 can be in contact with and extruded with the inner wall of the limiting groove 9, the stability and firmness after the bolt 3 is meshed with the threads on the inner wall of the liquid injection hole 2 are increased, and loosening and leakage are avoided; rotating seal lid 11 and driving sealing washer 12 and rotate, making sealing washer 12 and apron body 1 contact extrusion, can fixing seal lid 11 through screw 13, being convenient for protect bolt 3 and sealed 4 of filling up, avoid taking place the oxidation with the air contact for a long time, influence life and take place the weeping.

Compared with the prior art, the sealing structure of the liquid injection hole of the lithium battery cover plate has the following beneficial effects:

the utility model provides a sealing structure of a liquid injection hole of a lithium battery cover plate, wherein a bolt 3 is installed in the liquid injection hole 2 in a threaded manner, a sealing gasket 4 is movably sleeved on the bolt 3, the sealing gasket 4 is movably connected with the inner wall of the liquid injection hole 2, the operation process is simple, the efficiency is high, the sealing gasket is not easy to burst out, the liquid injection hole 2 can be sealed, liquid leakage is avoided, two rotating rods 8 are symmetrically and rotatably installed on the inner wall of a shell 7, two limiting grooves 9 are symmetrically arranged at the bottom of the cover plate body 1, a limiting block 10 is fixedly installed on the rotating rods 8, the limiting block 10 is movably connected with the inner wall of the limiting groove 9, the limiting block 10 can be in contact extrusion with the inner wall of the limiting groove 9, the stability and firmness after the bolt 3 is meshed with the threads on the inner wall of the liquid injection hole 2 are convenient to increase, and loose liquid leakage is avoided, sealed lid 11 rotates to be installed the top of apron body 1, sealing washer 12 fixed mounting be in the bottom of sealed lid 11, just sealing washer 12 with the sealed swing joint of apron body 1 is convenient for protect bolt 3 and sealed 4 of filling up, avoids taking place the oxidation with the air contact for a long time, influences life and takes place the weeping.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. The utility model provides a lithium battery cover plate annotate liquid hole sealing structure, its characterized in that, includes apron body, jam spare, dwang, drive mechanism, extension rod and casing, wherein:

the cover plate body is provided with a liquid injection hole, and the blocking piece is detachably arranged in the liquid injection hole;

the rotating rod is transversely and rotatably arranged on the shell and is rotated to be clamped on the cover plate body;

drive mechanism establishes between extension rod and dwang, and the extension rod vertical movement in-process drives the driving plate through drive mechanism and rotates.

2. The sealing structure for the liquid injection hole of the lithium battery cover plate as claimed in claim 1, further comprising a limiting block, wherein the limiting block is fixed at one end of the rotating rod away from the blocking member, the bottom of the cover plate body is provided with a limiting groove, and the limiting block is slidably connected with the limiting groove.

3. The structure of sealing the injection hole of a lithium battery cap plate according to claim 1, wherein two rotation levers are provided, and the two rotation levers are disposed opposite to each other.

4. The sealing structure for the electrolyte injection hole of the lithium battery cover plate as claimed in claim 1, wherein the electrolyte injection hole is a T-shaped hole, and further comprising a sealing gasket, the sealing gasket is sleeved on the blocking member and is positioned on the step surface of the T-shaped hole.

5. The sealing structure for the liquid injection hole of the lithium battery cover plate as claimed in claim 1, further comprising a sealing cover, wherein the sealing cover is detachably arranged on the cover plate body, and the sealing cover is positioned above the liquid injection hole.

6. The sealing structure for the liquid injection hole of the lithium battery cover plate as claimed in claim 5, wherein a sealing ring is provided below the sealing cover, and the sealing ring abuts against the upper surface of the cover plate body.

7. The structure for sealing the injection hole of a lithium battery lid as claimed in claim 5, wherein the sealing lid is detachably mounted on the lid body by a fixing member.

8. The sealing structure for the liquid injection hole of the lithium battery cover plate as claimed in any one of claims 1 to 7, further comprising a threaded rod rotatably mounted on the cover plate body, wherein the lower end of the threaded rod is connected with the extension rod in a threaded manner, and the rotation of the threaded rod drives the extension rod to slide in the vertical direction.

9. The sealing structure for the liquid injection hole of the lithium battery cap plate as claimed in claim 8, further comprising a rotating shaft, wherein the rotating shaft is transversely rotatably mounted on the case, the axis of the rotating shaft is perpendicular to the axis of the rotating rod rotating relative to the case, the transmission mechanism comprises a first transmission mechanism and a second transmission mechanism, the first transmission mechanism is disposed between the rotating rod and the rotating shaft, the rotating shaft rotates through the first transmission mechanism to drive the rotating rod to rotate, the second transmission mechanism is disposed between the rotating shaft and the threaded rod or the extension rod, and the second transmission mechanism is used for driving the rotating shaft to rotate.

10. The structure of sealing the injection hole of a lithium battery cap plate according to claim 9, wherein the first transmission mechanism is a worm gear transmission mechanism, the second transmission mechanism is provided between the shaft and the threaded rod, and the second transmission mechanism is a worm gear transmission mechanism.