CN211347260U

CN211347260U - Lithium battery helium leak detection vacuum box

Info

Publication number: CN211347260U
Application number: CN202020206861.6U
Authority: CN
Inventors: 张果; 蓝峰; 李健; 雷福元; 瞿骑龙
Original assignee: Ulvac Orient Chengdu Co Ltd
Current assignee: Ulvac Orient Chengdu Co Ltd
Priority date: 2020-02-25
Filing date: 2020-02-25
Publication date: 2020-08-25
Anticipated expiration: 2030-02-25

Abstract

The utility model discloses a lithium cell helium leak hunting vacuum chamber, including last box and with the lower box of last box adaptation, be provided with two lithium cell standing grooves in the lower box, two lithium cell standing groove lateral wall all is provided with the location arch, it places the helium pipe that fills that the frame corresponds with the lithium cell to be provided with two in the last box, go up the internal vacuum tube that still is provided with of box. The novel lithium battery box is simple in structure, can be used for placing two lithium batteries simultaneously, is tight in sealing, prevents the lithium batteries from shaking, and avoids the problem of helium leakage by mistake.

Description

Lithium battery helium leak detection vacuum box

Technical Field

The utility model relates to a lithium cell detects technical field, especially relates to a lithium cell helium leak hunting vacuum chamber.

Background

With the development of society, lithium batteries have been increasingly applied to our lives. In the use process of the lithium battery, if quality problems such as electric leakage, short circuit combustion and the like occur, very large damage is easily caused, so that the quality detection of the lithium battery is a very important link in the production process of the lithium battery. The detection of the sealing performance of the lithium battery is a very important quality detection link. The existing lithium battery tightness detection generally adopts a helium leak detection mode, a lithium battery is placed in a vacuum box, helium is filled into the lithium battery, and then the content of the helium in the vacuum box is detected to judge whether the lithium battery leaks air or not and whether the sealing is tight or not.

The vacuum box of current lithium cell helium leak hunting usefulness can only place a lithium cell once, and detection efficiency is low, and the lithium cell rocks easily in the vacuum box, causes the helium condition of leaking by mistake when aerifing easily.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a lithium cell helium leak hunting vacuum chamber, the fine above-mentioned problem of having solved, its simple structure can place two lithium cells simultaneously, and is sealed tight, has prevented rocking of lithium cell, has avoided the problem that the helium mistake was let out.

The technical scheme of the utility model a lithium cell helium leak hunting vacuum chamber, including last box and with the lower box of last box adaptation, be provided with two lithium cell standing grooves in the lower box, two lithium cell standing groove lateral wall all is provided with the location arch, it places the helium pipe that fills that the frame corresponds with the lithium cell to be provided with two in the upper box, still be provided with vacuum tube in the upper box.

Furthermore, a sealing groove is formed in the contact surface of the lower box body and the upper box body, and a sealing ring is arranged in the sealing groove. The upper box body and the lower box body are tightly sealed, so that the phenomenon that the vacuum environment is damaged due to the entering of external air in a vacuum state is avoided.

Furthermore, a helium detection device is arranged in the upper box body. The helium content detector is used for detecting the helium content in a closed space formed between the upper box body and the lower box body.

Furthermore, a compressed air pipe is arranged in the upper box body. The compressed air pipe is connected with a compressed air source and is used for filling air into a closed space formed by the upper box body and the lower box body, so that the vacuum state of the closed space is relieved, and residual helium is blown off.

Furthermore, a rubber sealing gasket is arranged at the end part of the helium filling pipe. The helium filling pipe is used for being connected with an inlet of a lithium battery to be detected, helium is filled into the lithium battery, the rubber sealing gasket is used for sealing between the lithium battery and the helium filling pipe, and the helium is prevented from leaking into the vacuum box from the outside of the connection.

Further, the side wall of the lithium battery placing groove is provided with a vent groove. The air channel makes the space between lithium cell standing groove and the lithium cell communicate each other, and the evacuation pipe of being convenient for extracts the air in the airtight space, avoids the exhaust of air to the greatest extent.

Furthermore, a one-way valve for exhausting air outwards is arranged on the side wall of the lower box body. The check valve can only be by the internal outside exhaust air of nowel, and external air can not enter into the nowel by the check valve in, can be fine keep last box and the vacuum state of the airtight space that forms between the nowel, simultaneously also can be fine with the gas outgoing in the airtight space, like the helium that leaks etc. the airtight space of abundant discharge, clearance convenient and fast has avoided the influence of remaining helium to next measuring.

The utility model has the advantages that:

1. the utility model discloses a vacuum box comprises upper box and lower box, can place two lithium cells in a vacuum box, has improved the efficiency of helium leak hunting, and two lithium cells correspond two respectively and fill the helium pipe simultaneously, fill the helium to the lithium cell respectively, have further improved detection efficiency;

2. set up the lithium cell standing groove in the box down, fix a position the lithium cell through the location arch of lithium cell standing groove lateral wall simultaneously, prevented rocking of lithium cell, make and fill the helium pipe can be stable tight dock with the lithium cell and aerify, avoided the mistake of helium to leak, improved the detection precision.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the present invention (including a lithium battery to be tested);

fig. 2 is a schematic perspective view of a first embodiment of the present invention (without the lithium battery to be tested);

FIG. 3 is a schematic perspective view of the upper case according to the first embodiment of the present invention;

FIG. 4 is a schematic perspective view of a lower case according to a second embodiment of the present invention;

in the figure: 1. an upper box body; 2. a lower box body; 3. a lithium battery placement groove; 4. positioning the projection; 5. charging a helium pipe; 6. vacuumizing a tube; 7. a sealing groove; 8. a seal ring; 9. a helium detection device; 10. compressing the air pipe; 11. A rubber gasket; 12. a vent channel; 13. a one-way valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the utility model is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows: as shown in fig. 1-3, the utility model provides a lithium cell helium leak hunting vacuum chamber, including last box 1 and with the lower box 2 of last box 1 adaptation, be provided with two lithium cell standing grooves 3, two in the box 2 down 3 lateral walls of lithium cell standing groove all are provided with location arch 4, it places the helium pipe 5 that fills that the frame corresponds with the lithium cell to be provided with two in the box 1, still be provided with vacuum tube 6 in the last box 1.

The utility model discloses a vacuum box comprises upper box 1 and lower box 2, can place two lithium cells in a vacuum box, has improved the efficiency of helium leak hunting, and two lithium cells correspond two respectively and fill helium pipe 5 simultaneously, fill the helium to the lithium cell respectively, have further improved detection efficiency; set up lithium cell standing groove 3 in box 2 down, fix a position the lithium cell through the protruding 4 in location of 3 lateral walls of lithium cell standing groove simultaneously, prevented rocking of lithium cell, make and fill that helium pipe 5 can be stable tight dock with the lithium cell and aerify, avoided the mistake of helium to leak, improved the detection precision.

And a helium detection device 9 is arranged in the upper box body 1. The helium content detector is used for detecting the helium content in a closed space formed between the upper box body 1 and the lower box body 2. A compressed air pipe 10 is arranged in the upper box body 1. The compressed air pipe 10 is connected with a compressed air source and is used for filling air into the closed space formed by the upper box body 1 and the lower box body 2, so that the vacuum state is relieved, and residual helium is blown off. The end part of the helium filling pipe 5 is provided with a rubber sealing gasket 11. The helium filling pipe 5 is used for being connected with an inlet of a lithium battery to be detected, helium is filled into the lithium battery, and the rubber sealing gasket 11 is used for sealing between the lithium battery and the helium filling pipe 5, so that the helium is prevented from leaking into the vacuum box from the outside of the connection. The contact surface of lower box 2 and last box 1 is provided with seal groove 7, be provided with sealing ring 8 in the seal groove 7. The upper box body 1 and the lower box body 2 are tightly sealed, and the phenomenon that the vacuum environment is damaged due to the entering of external air in a vacuum state is avoided.

When the lithium battery positioning device is used, two lithium batteries to be tested are placed in the lithium battery placing groove 3 of the lower box body 2, the lithium batteries can be positioned and fixed through the positioning bulge 4, then the upper box body 1 covers the lower box body 2, the upper box body 1 and the lower box body 2 can be tightly sealed through the gravity of the upper box body 1, downward pressure can be applied to the upper box body 1, or upward jacking force can be applied to the lower box body 1, and the upper box body 1 and the lower box body 1 are tightly fixed and sealed; then, a vacuum pumping pipe 6 is adopted to pump vacuum to the vacuum box, helium is filled into the two lithium batteries respectively through a helium filling air pipe 5, after the helium filling of the first lithium battery is completed, a helium detection device 9 is adopted to detect the inside of the vacuum box, if no helium is detected, the first lithium battery is qualified, helium is filled into the second lithium battery, secondary helium detection is carried out, when the first lithium battery is unqualified, a compressed air pipe 10 is adopted to ventilate the inside of the vacuum box, the vacuum environment is relieved, the unqualified lithium battery is taken out, then the compressed air pipe 10 is adopted to sweep the vacuum box, residual helium is discharged, the operation is repeated, and the detection of the next lithium battery is carried out. The utility model discloses a vacuum box can carry out the detection of two lithium cells in a vacuum environment, has improved detection efficiency, has shortened check-out time, has also reduced the detection cost.

Example two: as shown in fig. 4, in addition to the first embodiment, a ventilation groove 12 is provided on the side wall of the lithium battery housing groove 3. The vent groove 12 enables the space between the lithium battery placing groove 3 and the lithium battery to be communicated with each other, so that the vacuumizing tube 6 can conveniently extract air in the closed space, and the air is prevented from being exhausted.

And a one-way valve 13 for exhausting air outwards is arranged on the side wall of the lower box body 2. Check valve 13 can only be by in lower box 2 to external exhaust air, and external air can not enter into lower box 2 by check valve 13 in, can be fine keep the vacuum state of the airtight space that forms between box 1 and the lower box 2, simultaneously also can be fine with the gas outgoing in the airtight space, like the helium that leaks etc. the airtight space of abundant discharge, clearance convenient and fast has avoided the influence of remaining helium to next detection.

The utility model discloses can place two lithium cells simultaneously, it is sealed tight, prevent rocking of lithium cell, avoid the problem that the helium mistake was let out.

Of course, the present invention may have other embodiments, and those skilled in the art may make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the protection scope of the appended claims.

Claims

1. The utility model provides a lithium cell helium leak hunting vacuum chamber which characterized in that: the lithium battery box comprises an upper box body (1) and a lower box body (2) matched with the upper box body (1), wherein two lithium battery placing grooves (3) and two positioning protrusions (4) are arranged in the lower box body (2), two helium filling pipes (5) corresponding to lithium battery placing frames are arranged in the upper box body (1), and a vacuumizing pipe (6) is further arranged in the upper box body (1).

2. The lithium battery helium leak detection vacuum box according to claim 1, characterized in that: the contact surface of lower box (2) and last box (1) is provided with seal groove (7), be provided with sealing ring (8) in seal groove (7).

3. The lithium battery helium leak detection vacuum box according to claim 1, characterized in that: and a helium detection device (9) is arranged in the upper box body (1).

4. The lithium battery helium leak detection vacuum box according to claim 1, characterized in that: a compressed air pipe (10) is arranged in the upper box body (1).

5. The lithium battery helium leak detection vacuum box according to claim 1, characterized in that: the end part of the helium filling pipe (5) is provided with a rubber sealing gasket (11).

6. The lithium battery helium leak detection vacuum box according to claim 1, characterized in that: the side wall of the lithium battery placing groove (3) is provided with a vent groove (12).

7. The lithium battery helium leak detection vacuum box according to claim 1, characterized in that: and a one-way valve (13) for exhausting air outwards is arranged on the side wall of the lower box body (2).