CN218211767U

CN218211767U - Be used for explosion-proof valve shutoff anchor clamps of lithium cell package gas tightness test

Info

Publication number: CN218211767U
Application number: CN202222055462.6U
Authority: CN
Inventors: 王雪友; 刘超辉; 谢强胜; 谢文杰; 毕超奇; 唐铭
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Hefei Gotion High Tech Power Energy Co Ltd
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2023-01-03
Anticipated expiration: 2032-08-05

Abstract

The utility model discloses an explosion-proof valve plugging clamp for air tightness test of a lithium battery pack, which comprises an explosion-proof valve, wherein the upper surface of the explosion-proof valve is provided with a pore, and the explosion-proof valve also comprises a clamping arm which is arranged on the upper surface of the explosion-proof valve; the lower surface of the clamping arm seals the upper surface of the explosion-proof valve, the clamping arm is provided with a first sealing channel, the first sealing channel is positioned above the explosion-proof valve, the first sealing channel is provided with a first opening and a second opening, the first opening and the second opening are respectively positioned at two sides of the explosion-proof valve, the first opening and the second opening are both provided with elastic sealing assemblies, sealing liquid is arranged in the first sealing channel, and a telescopic device is arranged in the first sealing channel; the telescopic device drives the sealing liquid to move, the elastic sealing assembly is driven by the sealing liquid to be fixed with the side face of the explosion-proof valve, sealing of the explosion-proof valve is achieved, sealing performance is improved, errors of explosion-proof valve test data caused by gas leakage are reduced, and test accuracy is improved.

Description

Be used for explosion-proof valve shutoff anchor clamps of lithium cell package gas tightness test

Technical Field

The utility model relates to a lithium cell test technical field especially relates to a be used for explosion-proof valve shutoff anchor clamps of lithium cell package gas tightness test.

Background

It is known that, in lithium cell package production process, need detect its gas tightness condition to the battery package to judge the waterproof dustproof ability of battery package, need aerify and test battery package internal pressure to battery package inside during the detection, and then reach the purpose of test battery package gas tightness.

However, an explosion-proof valve is arranged on one side of the battery pack, a plurality of pores are formed in the explosion-proof valve and can be communicated with the outside air, and when the air tightness of the battery pack is detected, the pores in the explosion-proof valve influence the accuracy of the test of the battery pack.

In the prior art, the patent number is CN110657921B discloses a lithium cell package gas tightness test explosion-proof valve shutoff anchor clamps, through the apron, the cooperation of seal receptacle and both sides drag hook design, realize sealed effect of compressing tightly and the quick seal to explosion-proof valve, bearing capacity and efficiency of software testing when having improved the test, the accuracy of test has been guaranteed, but need pass through the screw rod among the above-mentioned prior art and drive the apron rebound together through the boss, the apron drives the drag hook and upwards stimulates, thereby reverse effort has been formed to the seal receptacle, compress tightly downwards, make sealed tight and explosion-proof valve laminating together, reach sealed effect, this kind of sealed effect has following two point problems:

1. the screw rod is easy to slip with the boss after being rotated for a plurality of times for a long time, so that the plugging clamp loses the clamping effect and further loses the sealing effect on the explosion-proof valve;

2. this shutoff anchor clamps carry out the shutoff through sealed the end of ventilating of filling up to explosion-proof valve, but sealed the pad for a long time with explosion-proof valve contact friction, the damage can take place for the surface, can take place gas leakage phenomenon in the testing process, and then has reduced the accuracy of lithium cell package gas tightness test.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems existing in the background technology, the utility model provides an explosion-proof valve plugging clamp for air tightness test of a lithium battery pack;

an explosion-proof valve plugging clamp for a lithium battery pack airtightness test comprises an explosion-proof valve, a clamp arm and a clamping head, wherein a pore is formed in the upper surface of the explosion-proof valve; the lower surface of the clamping arm seals the upper surface of the explosion-proof valve, the clamping arm is provided with a first sealing channel, the first sealing channel is positioned above the explosion-proof valve, the first sealing channel is provided with a first opening and a second opening, the first opening and the second opening are respectively positioned at two sides of the explosion-proof valve, the first opening and the second opening are both provided with elastic sealing components, sealing liquid is arranged in the first sealing channel, and a telescopic device is arranged in the first sealing channel; the telescopic device drives the sealing liquid to move, and the elastic sealing assembly is driven by the sealing liquid to be fixed with the side face of the explosion-proof valve.

Preferably, the lower surface of the clamping arm is provided with a sealing groove, a sealing gasket is arranged in the sealing groove, and the sealing gasket seals the pore of the explosion-proof valve.

Preferably, a second sealing channel is formed between the clamping arm and the side face of the explosion-proof valve, and the second sealing channel is communicated with the sealing groove.

Preferably, a sealing film is arranged between the second sealing channel and the side face of the explosion-proof valve, and the outer side of the sealing film is attached to the side face of the explosion-proof valve.

Preferably, the telescopic device comprises a driving assembly and an elastic piece, one end of the elastic piece is fixed on the first sealing channel, the other end of the elastic piece is connected with a first sliding plug, and the first sliding plug is connected with the driving assembly.

Preferably, the number of the elastic parts is two, the elastic parts are symmetrically arranged in the first sealing channel, the number of the first sliding plugs is two, the two first sliding plugs are respectively connected with the two elastic parts, and the driving assembly is connected with the two first sliding plugs.

Preferably, the driving assembly comprises a rotating rod and a rotating plate, the rotating rod is rotatably connected with the first sealing channel, the rotating rod is fixedly connected with the rotating plate, the rotating plate is connected with the two first sliding plugs, and the rotating plate drives the two first sliding plugs to move close to or away from each other.

Preferably, the rotating plate is a diamond plate, and a diamond groove matched with the diamond plate is arranged at the joint of the two first sliding plugs and the diamond plate.

Preferably, the elastic sealing assembly comprises an elastic part and a clamping block, the elastic part is connected with the first sealing channel, the clamping block is fixed on one side, facing the explosion-proof valve, of the elastic part, and clamping grooves matched with the clamping block are formed in two side faces of the explosion-proof valve.

To sum up, the utility model discloses following beneficial effect has:

by designing the first sealing channel, the telescopic device in the first sealing channel pushes the sealing liquid to move so as to drive the clamping block to be fixed with the explosion-proof valve, and the sealing gasket completely seals the upper surface of the explosion-proof valve, so that the operation is simple and stable, and the sealing effect on the explosion-proof valve cannot be lost; further, design the sealed passageway of second and seal membrane, when sealed the pad surface when appearing damaged, the air current gets into the seal membrane of the sealed passageway of second, and the seal membrane is outwards bloated, tightly encircles on attached lateral wall around the explosion-proof valve top, prevents that gas from continuing to leak, has also improved the leakproofness, has reduced because gas leaks and causes explosion-proof valve test data's error, has improved the accuracy of test.

Additional aspects and advantages of the invention 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 invention.

Drawings

FIG. 1 is a schematic front sectional view of the present invention;

FIG. 2 is a schematic top view of the propulsion device of the present invention;

fig. 3 is an enlarged schematic view of the second sealing channel of the present invention.

Reference numbers: 1. a second spool; 2. a second sealing channel; 3. sealing liquid; 4. a knob; 5. a diamond plate; 6. a first spool; 7. an elastic member; 8. a gasket; 9. a first sealing channel; 10. a clamping block; 11. An explosion-proof valve; 12. and (5) sealing the film.

Detailed Description

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

It is to 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 in describing the invention and to simplify the description, 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 are not to be construed as limiting the invention.

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 explicitly defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. 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. 1-3, an explosion-proof valve plugging fixture for testing air tightness of a lithium battery pack comprises an explosion-proof valve 11, a fine hole is formed in the upper surface of the explosion-proof valve 11, and a clamping arm, wherein the lower surface of the clamping arm seals the upper surface of the explosion-proof valve 11, the clamping arm is provided with a first sealing channel 9, the first sealing channel 9 is in a convex shape, the first sealing channel 9 is located on the upper surface and two side surfaces of the explosion-proof valve 11, sealing liquid 3 is arranged in the first sealing channel 9, the first sealing channel 9 is provided with a telescopic device, and the telescopic device is located at the top of the first sealing channel 9; the first sealing channel 9 is provided with two openings which are respectively positioned at two sides of the explosion-proof valve 11, and the two openings of the first sealing channel 9 are both provided with elastic sealing components.

Specifically, the outside of the bottom of the first sealing channel 9 is provided with a sealing groove, a sealing gasket 8 is arranged in the sealing groove, the upper surface of the explosion-proof valve 11 is completely sealed by the sealing gasket 8, a second sealing channel 2 is formed between the side surfaces of the clamping arm and the explosion-proof valve 11, one end of the second sealing channel 2 is attached to the sealing gasket 8, a gap of 1 mm exists between the second sealing channel 2 and the sealing gasket 8, the other end of the second sealing channel 2 is provided with a sealing film 12, and the outside of the sealing film 12 is attached to the side wall of the explosion-proof valve 11.

Specifically, in this embodiment, the telescoping device includes the dwang, diamond plate 5, two elastic components 7, two first sliding plugs 6, the dwang is vertical to be interlude in the last bottom face of first sealed passageway 9, the dwang upper end is equipped with knob 4, the lower extreme of dwang rotates and connects on the inner wall of first sliding plug 6 passageway, fixed cover has connect diamond plate 5 on the dwang, diamond plate 5 both sides are connected with two first sliding plugs 6, two first sliding plugs 6 all are equipped with the rhombus groove with diamond plate 5 junction, two first sliding plugs 6 sliding connection are in first sealed passageway 9, two elastic components 7 one end are fixed in the inner wall of first sealed passageway 9, the other end is connected with two first sliding plugs 6 respectively, it drives two first sliding plugs 6 and makes the motion that is close to each other or keep away from each other to rotate diamond plate 5.

In other embodiments, the telescopic device may also be designed as a connecting pipe vertically communicated with the first sealing channel 9, a first sliding plug 6 and an elastic member 7 are arranged in the connecting pipe, the elastic member 7 is respectively connected with the first sliding plug 6 and the lower bottom surface of the inner cavity of the first sealing channel 9, and pushes the first sliding plug 6 to drive the sealing liquid to move to the two openings of the first sealing channel 9.

Specifically, the elastic sealing assembly comprises an elastic part 1 and a clamping block 10, the elastic part 1 is connected with the first sealing channel 9, the clamping block 10 is fixed on one side, facing the explosion-proof valve 11, of the elastic part 1, and clamping grooves matched with the clamping block 10 are formed in two side faces of the explosion-proof valve 11.

The working process is as follows:

in the process of testing the air tightness of the lithium battery pack, the sealing gasket 8 at the lower end of the first sealing channel 9 is placed on the upper surface of the explosion-proof valve 11, at the moment, the two short ends of the rhombic plate 5 are connected with the two first sliding plugs 6, then the rotary knob 4 is rotated to drive the rhombic plate 5 to rotate, so that the two long ends of the rhombic plate 5 abut against the rhombic grooves of the two first sliding plugs 6, the two first sliding plugs 6 move away from each other, the two first sliding plugs 6 compress the elastic part 7, the two first sliding plugs 6 push the sealing liquid 3 in the first sealing channel 9 to move towards the two second sliding plugs 1, and the two second sliding plugs 1 respectively push the fixture block 10 to slide out of the first sealing channel 9 and abut against the two side surfaces of the explosion-proof valve 11 to be arranged in the clamping grooves matched with the fixture block 10.

When the surface of the sealing gasket 8 is damaged in use, the airflow of the explosion-proof valve 11 flows into the sealing groove and enters the second sealing channel 2, the air pressure in the second sealing channel 2 is increased, so that the sealing membrane 12 at the other end of the second sealing channel 2 bulges outwards and tightly surrounds the side wall attached to the periphery of the top end of the explosion-proof valve 11, further gas is prevented from continuously leaking, errors of the test data of the explosion-proof valve 11 caused by gas leakage are reduced, and the test accuracy is improved.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The explosion-proof valve plugging clamp for the air tightness test of the lithium battery pack comprises an explosion-proof valve (11), wherein a fine hole is formed in the upper surface of the explosion-proof valve (11), and the explosion-proof valve plugging clamp is characterized by further comprising a clamping arm, wherein the clamping arm is mounted on the upper surface of the explosion-proof valve (11); the lower surface of the clamping arm seals the upper surface of the explosion-proof valve (11), the clamping arm is provided with a first sealing channel (9), the first sealing channel (9) is positioned above the explosion-proof valve (11), the first sealing channel (9) is provided with a first opening and a second opening, the first opening and the second opening are respectively positioned at two sides of the explosion-proof valve (11), the first opening and the second opening are both provided with elastic sealing components, sealing liquid (3) is arranged in the first sealing channel (9), and the first sealing channel (9) is provided with a telescopic device; the telescopic device drives the sealing liquid (3) to move, and the sealing liquid (3) moves to drive the elastic sealing assembly to be fixed with the side face of the explosion-proof valve (11).

2. The sealing clamp for the explosion-proof valve in the air tightness test of the lithium battery pack as claimed in claim 1, wherein a sealing groove is formed in the lower surface of the clamping arm, a sealing gasket (8) is arranged in the sealing groove, and the sealing gasket (8) seals the pores of the explosion-proof valve (11).

3. The sealing clamp for the lithium battery pack airtightness test explosion-proof valve according to claim 2, wherein a second sealing channel (2) is formed between the clamping arm and the side surface of the explosion-proof valve (11), and the second sealing channel (2) is communicated with the sealing groove.

4. The explosion-proof valve plugging fixture for the air tightness test of the lithium battery pack as claimed in claim 3, wherein a sealing film (12) is disposed between the second sealing channel (2) and the side surface of the explosion-proof valve (11), and the outer side of the sealing film (12) is attached to the side surface of the explosion-proof valve (11).

5. The explosion-proof valve plugging fixture for the tightness test of the lithium battery pack according to claim 1, wherein the telescopic device comprises a driving assembly and an elastic member (7), one end of the elastic member (7) is fixed to the first sealing channel (9), the other end of the elastic member (7) is connected with a first sliding plug (6), and the first sliding plug (6) is connected with the driving assembly.

6. The explosion-proof valve plugging fixture for the tightness test of the lithium battery pack as claimed in claim 5, wherein there are two elastic members (7), the elastic members (7) are symmetrically arranged in the first sealing channel (9), there are two first sliding plugs (6), the two first sliding plugs (6) are respectively connected with the two elastic members (7), and the driving assembly is connected with the two first sliding plugs (6).

7. The sealing clamp for the explosion-proof valve in the tightness test of the lithium battery pack according to claim 6, wherein the driving assembly comprises a rotating rod and a rotating plate, the rotating rod is rotatably connected with the first sealing channel (9), the rotating rod is fixedly connected with the rotating plate, the rotating plate is connected with the two first sliding plugs (6), and the rotating plate drives the two first sliding plugs (6) to move towards or away from each other.

8. The explosion-proof valve plugging fixture for the air tightness test of the lithium battery pack as claimed in claim 7, wherein the rotating plate is a diamond-shaped plate (5), and a diamond-shaped groove matched with the diamond-shaped plate (5) is formed at the joint of the two first sliding plugs (6) and the diamond-shaped plate (5).

9. The explosion-proof valve plugging fixture for tightness test of lithium battery packs according to claim 1, wherein the elastic sealing assembly comprises an elastic member (1) and a fixture block (10), the elastic member (1) is connected with the first sealing channel (9), the fixture block (10) is fixed on one side of the elastic member (1) facing the explosion-proof valve (11), and two side surfaces of the explosion-proof valve (11) are provided with clamping grooves matched with the fixture block (10).