CN219319686U

CN219319686U - Lithium battery shell air tightness detection device

Info

Publication number: CN219319686U
Application number: CN202223467774.4U
Authority: CN
Inventors: 薛韶军
Original assignee: Suzhou Beirui Technology Co ltd
Current assignee: Suzhou Beirui Technology Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-07-07
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses a lithium battery shell air tightness detection device which comprises a box body and a battery shell, wherein an inner cavity is formed in the box body, an upper supporting plate and a lower supporting plate are fixedly connected to the inner wall of the inner cavity, a fixing assembly capable of fixing the battery shell is connected to the surface of the upper supporting plate, a testing assembly is connected to the surface of the lower supporting plate, and the lithium battery shell air tightness detection device relates to the technical field of lithium batteries.

Description

Lithium battery shell air tightness detection device

Technical Field

The utility model relates to the technical field of lithium batteries, in particular to a lithium battery shell air tightness detection device.

Background

The patent with the publication number of CN217483791U discloses a lithium battery shell air tightness testing device in the lithium battery detection field, the structure of the device comprises a sealing fixing plate, a fresh air module, a shell, a detection module, a lithium battery shell, an electromagnetic fixer and a guide rod, wherein the fresh air module is fixedly connected above the shell, the detection module is arranged on the right side of the shell, the electromagnetic fixer is arranged at the upper end of the shell, the lithium battery shell is arranged on the right side of the sealing fixing plate, the guide rod is arranged at the lower end of the right side of the sealing fixing plate, an inflation valve and a pressure release valve are matched to control the air pressure inside the lithium battery shell, the positive pressure method is adopted to rapidly detect the air tightness defect of the lithium battery shell, the air tightness detection accuracy of the lithium battery shell can be accurately detected by utilizing the air pressure difference matched detection module, the detection error rate is reduced, and the testing efficiency of the air tightness test of the lithium battery shell is improved.

The above patent detects the helium concentration through the detection module, and judges whether the air tightness of the lithium battery shell is good through the concentration change, however, the method cannot be used for mass detection in factory production, if the air tightness of the battery shell is good, but the air leakage speed is slow, a great deal of time is required to be consumed by the method to detect the obvious change of the concentration, and the method is not suitable for mass detection in factory production in turn.

Therefore, we propose a lithium battery shell air tightness detection device.

Disclosure of Invention

The present utility model has been made in view of the above-mentioned and/or problems occurring in the prior art for detecting the air tightness of a lithium battery case.

Therefore, the utility model is to connect the testing component on the surface of the lower supporting plate, fix the sealing plate and the box body together by utilizing the electromagnetic fixing block and the magnetic attraction, so that the sealing plate and the lower supporting plate form a sealing environment, after water is injected through the water inlet pipe, air is introduced into the battery shell, and whether the air tightness of the battery shell is good is judged by observing whether air bubbles are generated on the surface of the battery shell, so as to solve the problem that a great amount of time is required for detection in the background technology.

The utility model provides a lithium cell casing gas tightness detection device, includes box and battery casing, the inside inner chamber that is equipped with of box, the inner wall fixedly connected with of inner chamber goes up backup pad and lower backup pad, the surface connection of going up the backup pad has the fixed subassembly that can fix the battery casing, the surface connection of lower backup pad has test assembly.

As a preferable scheme of the lithium battery shell air tightness detection device, the fixing assembly comprises a motor, wherein the motor is fixedly connected to the upper surface of the upper supporting plate, and an output shaft of the motor extends to the lower part of the upper supporting plate and is fixedly connected with a threaded rod.

As a preferable scheme of the lithium battery shell air tightness detection device, the surface of the threaded rod is connected with a threaded sleeve in a threaded manner, and the bottom end of the threaded sleeve is fixedly connected with a fixing plate.

As a preferable scheme of the lithium battery shell air tightness detection device, two ends of the fixing plate are fixedly connected with sliding blocks, sliding grooves are formed in the inner walls of two sides of the inner cavity, and the surfaces of the sliding blocks are in sliding connection with the inner walls of the sliding grooves.

As a preferable scheme of the lithium battery shell air tightness detection device, the test assembly comprises a sealing ring, the sealing ring is fixedly connected to the upper surface of the lower base plate, the two side surfaces of the inner cavity are respectively communicated with a water inlet pipe and a water outlet pipe, and the upper surface of the lower base plate is fixedly connected with the sealing ring.

As a preferable scheme of the lithium battery shell air tightness detection device, guide holes are formed in the top end and the two sides of the bottom end of the box body, and guide rods are connected to the inner walls of the guide holes in a sliding mode.

As a preferable scheme of the lithium battery shell air tightness detection device, one end of the guide rod extending to the outside of the box body is fixedly connected with a sealing plate, one side surface of the sealing plate, which is close to the box body, is fixedly connected with a sealing strip, and an observation port is formed in the sealing plate.

As a preferable scheme of the lithium battery shell air tightness detection device, the magnetic attraction block is fixedly connected to the top end of one side of the sealing plate, which is close to the box body, the electromagnetic fixing block is connected to the top end of one side of the box body, which is close to the sealing plate, and the bottom end of the battery shell is respectively communicated with the air inlet valve and the air outlet valve.

Compared with the prior art, the method has the advantages that: through setting up connection test assembly, utilize electromagnetism fixed block and magnetism to inhale and fix shrouding and box together, make shrouding and lower backup pad form sealing environment, through the inlet tube water injection back, to the inside gas that lets in of battery case, whether have the bubble to produce through observing the battery case surface and judge whether the gas tightness of battery case is good.

Drawings

FIG. 1 is a schematic diagram of a lithium battery case air tightness detection device;

FIG. 2 is a front view of the inside of a lithium battery case body of the lithium battery case body air tightness detection device;

FIG. 3 is a top cross-sectional view of a lithium battery case tightness detection device;

fig. 4 is a right side cross-sectional view of a lithium battery case air tightness detection device;

fig. 5 is a rear view of a sealing plate of the lithium battery case air tightness detection device.

In the figure: the box body 1, the inner cavity 11, the water inlet pipe 12, the water outlet pipe 13, the upper supporting plate 14, the lower supporting plate 15, the battery shell 2, the motor 31, the threaded rod 32, the threaded sleeve 33, the sliding block 34, the fixing plate 35, the sliding groove 36, the sealing ring 51, the guide hole 52, the guide rod 53, the sealing strip 54, the sealing plate 55, the observation port 56, the magnetic suction block 57, the electromagnetic fixing block 58, the air inlet valve 6 and the air outlet valve 7.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

The utility model provides a lithium battery shell air tightness detection device, which is shown in fig. 1, 2, 3, 4 and 5, and comprises a box body 1 and a battery shell 2, wherein an inner cavity 11 is arranged in the box body 1, an upper support plate 14 and a lower support plate 15 are fixedly connected to the inner wall of the inner cavity 11, a fixing component capable of fixing the battery shell 2 is connected to the surface of the upper support plate 14, a testing component is connected to the surface of the lower support plate 15, the inner cavity 11 of the box body 1 is used for arranging the upper support plate 14 and the lower support plate 15, the upper support plate 14 is connected with the fixing component and used for fixing the battery shell 2, and the lower support plate 15 is connected with the testing component and used for detecting the air tightness of the battery shell 2.

The fixed subassembly includes motor 31, motor 31 fixed connection is at the upper surface of upper supporting plate 14, the output shaft of motor 31 extends to the below of upper supporting plate 14 and fixedly connected with threaded rod 32, threaded rod 32's surface threaded connection has threaded sleeve 33, threaded sleeve 33's bottom fixedly connected with fixed plate 35, fixed plate 35's both ends fixedly connected with slider 34, spout 36 has been seted up to the both sides inner wall of inner chamber 11, slider 34's surface and spout 36 inner wall sliding connection, motor 31 is used for providing power, drive threaded rod 32 through motor 31 and rotate, utilize threaded rod 32 and threaded sleeve 33's threaded connection to drive fixed plate 35 and lift, thereby can utilize fixed plate 35 to fix battery case 2, slider 34 slides at spout 36 inner wall and is used for spacing fixed plate 35.

The test assembly comprises a sealing ring 51, the sealing ring 51 is fixedly connected to the upper surface of the lower bottom plate, the two side surfaces of the inner cavity 11 are respectively communicated with a water inlet pipe 12 and a water outlet pipe 13, the upper surface of the lower bottom plate is fixedly connected with the sealing ring 51, the insides of the two sides of the top end and the bottom end of the box body 1 are respectively provided with a guide hole 52, the inner wall of the guide hole 52 is slidably connected with a guide rod 53, one end of the guide rod 53 extending to the outside of the box body 1 is fixedly connected with a sealing plate 55, one side surface of the sealing plate 55 close to the box body 1 is fixedly connected with a sealing strip 54, an observation port 56 is arranged in the sealing plate 55, one side top end of the sealing plate 55 close to the box body 1 is fixedly connected with a magnetic suction block 57, the top of one side of box 1 near shrouding 55 is connected with electromagnetic fixing piece 58, the bottom of battery casing 2 communicates respectively has admission valve 6 and air outlet valve 7, sealing washer 51 is used for sealing battery casing 2 bottom, avoid water to flow from the inside of lower backup pad 15, inlet tube 12 is connected with outside water source, be used for intaking, test battery casing 2, guide bar 53 and guiding hole 52 are used for leading shrouding 55, electromagnetic fixing piece 58 and magnetic attraction piece 57 make shrouding 55 fixed with box 1, shrouding 55 and lower backup pad 15 form sealing environment when shrouding 55 is fixed with box 1, sealing washer 54 is used for sealing the place that shrouding 55 and lower backup pad 15 contacted, viewing aperture 56 is transparent glass.

Working principle: when the battery shell 2 is specifically used, the battery shell 2 is placed on the upper surface of the sealing ring 51, the motor 31 is turned on, the threaded rod 32 is driven to rotate by utilizing the rotation of the output shaft of the motor 31, the fixing plate 35 is driven to descend by the threaded connection of the threaded rod 32 and the threaded sleeve 33, so that the battery shell 2 can be fixed by utilizing the fixing plate 35, the sealing plate 55 is pushed inwards, the electromagnetic fixing block 58 and the magnetic attraction fix the sealing plate 55 with the box body 1 together, water is injected into the inner cavity 11 through the water inlet pipe 12 until the top end of the battery shell 2 is cleared, air is introduced into the battery shell 2 through the air inlet valve 6, whether air bubbles are generated on the surface of the battery shell 2 is observed through the observation port 56, if so, the air tightness of the battery shell 2 is poor, and if not, the air tightness of the battery shell 2 is good.

Although the utility model has been described hereinabove with reference to embodiments, various modifications thereof may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the features of the disclosed embodiments may be combined with each other in any manner as long as there is no structural conflict, and the exhaustive description of these combinations is not given in this specification merely for the sake of omitting the descriptions and saving resources. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides a lithium battery shell gas tightness detection device, includes box (1) and battery shell (2), the inside inner chamber (11) that is equipped with of box (1), its characterized in that, the inner wall fixedly connected with of inner chamber (11) goes up backup pad (14) and lower backup pad (15), the surface of going up backup pad (14) is connected with the fixed subassembly that can fix battery shell (2), the surface of lower backup pad (15) is connected with test assembly;

the fixing assembly comprises a motor (31), the motor (31) is fixedly connected to the upper surface of the upper supporting plate (14), and an output shaft of the motor (31) extends to the lower part of the upper supporting plate (14) and is fixedly connected with a threaded rod (32);

the surface of the threaded rod (32) is in threaded connection with a threaded sleeve (33), and the bottom end of the threaded sleeve (33) is fixedly connected with a fixing plate (35);

the two ends of the fixed plate (35) are fixedly connected with sliding blocks (34), sliding grooves (36) are formed in the inner walls of the two sides of the inner cavity (11), and the surfaces of the sliding blocks (34) are in sliding connection with the inner walls of the sliding grooves (36);

the testing assembly comprises a sealing ring (51), the sealing ring (51) is fixedly connected to the upper surface of the lower base plate, the two side surfaces of the inner cavity (11) are respectively communicated with a water inlet pipe (12) and a water outlet pipe (13), and the sealing ring (51) is fixedly connected to the upper surface of the lower base plate.

2. The lithium battery shell air tightness detection device according to claim 1, wherein guide holes (52) are formed in the top end and the two side inner parts of the bottom end of the box body (1), and guide rods (53) are slidably connected to the inner walls of the guide holes (52).

3. The lithium battery shell air tightness detection device according to claim 2, wherein one end of the guide rod (53) extending to the outside of the box body (1) is fixedly connected with a sealing plate (55), one side surface of the sealing plate (55) close to the box body (1) is fixedly connected with a sealing strip (54), and an observation port (56) is formed in the sealing plate (55).

4. A lithium battery shell air tightness detection device according to claim 3, characterized in that a magnetic attraction block (57) is fixedly connected to the top end of one side of the sealing plate (55) close to the box body (1), an electromagnetic fixing block (58) is connected to the top end of one side of the box body (1) close to the sealing plate (55), and an air inlet valve (6) and an air outlet valve (7) are respectively communicated with the bottom end of the battery shell (2).