Tool for detecting welding sealing performance of sealing aluminum nail and helium detection system

Abstract

The utility model provides a tool for detecting the welding sealing performance of a sealing aluminum nail and a helium detection system, and relates to the technical field of battery production equipment.The tool for detecting the welding sealing performance of the sealing aluminum nail comprises a detection main pipe and a detection auxiliary pipe; the adsorption port is used for abutting against a liquid injection hole of a battery cover plate, the electromagnetic chuck is used for magnetically sucking a sealing aluminum nail on the battery cover plate, and the detection auxiliary pipe is used for being connected with a negative pressure device. According to the tool for detecting the welding sealing performance of the sealing aluminum nail, the adsorption opening of the detection main pipe can correspond to the liquid injection hole, the negative pressure adsorption device enables the interior of the detection main pipe to be in a negative pressure state, the electromagnetic chuck enables the plastic nail body to move upwards, and a gap is formed between the liquid injection hole and the plastic nail body; the helium moves to the upper part of the rubber nail main body, and if a gap is welded on the sealing aluminum nail, the helium can enter the detection main pipe from the gap, so that whether the sealing cover plate of the sealing aluminum nail is well welded with the battery cover plate or not is judged.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production equipment, in particular to a tooling for detecting the welding tightness of a sealed aluminum nail and a helium detection system. Background Technique

[0002] When a lithium battery is completed, it is necessary to detect the air tightness of the lithium battery, and the commonly used detection method is helium detection. At present, the ammonia detection method is generally used to detect the tightness of batteries with larger volumes, that is, helium is filled into the battery before sealing, and then the helium concentration leaked from the battery is detected in a negative pressure environment to judge the seal of the battery.

[0003] Generally, there are many reasons for helium detection NG, such as poor full welding, poor pole column injection molding, poor explosion-proof valve welding, shell damage, poor sealed aluminum nail welding, etc. Therefore, when helium detection is poor, on-site technicians need to spend a lot of time troubleshooting the reasons, resulting in waste of manpower and material resources. Content of the Utility Model

[0004] The purpose of the utility model is to provide a tooling for detecting the welding tightness of a sealed aluminum nail, so as to alleviate the technical problems of time-consuming and laborious troubleshooting when helium detection has problems.

[0005] The utility model provides a tooling for detecting the welding tightness of a sealed aluminum nail, which includes a detection main pipe and a detection auxiliary pipe, and the detection auxiliary pipe is connected and communicated with the detection main pipe;

[0006] One end of the detection main pipe has an adsorption port, and the adsorption port is communicated with the detection auxiliary pipe; an electromagnetic chuck is arranged in the detection main pipe;

[0007] The adsorption port is used to abut against the liquid injection hole of the battery cover plate, the electromagnetic chuck is used to magnetically attract the sealed aluminum nail on the battery cover plate, and the detection auxiliary pipe is used to connect with a negative pressure device.

[0008] In an optional embodiment, a sealing nozzle is arranged at the adsorption port, and the sealing nozzle is screwed on the detection main pipe.

[0009] In an optional embodiment, the material of the sealing nozzle is silica gel.

[0010] In an optional embodiment, the sealing nozzle has a circular opening, and the inner diameter of the circular opening is larger than the inner diameter of the liquid injection hole.

[0011] In an optional embodiment, an installation hole is arranged in the detection main pipe, and an installation column matching the installation hole is arranged on the electromagnetic chuck, and the electromagnetic chuck is connected with the detection main pipe through the installation column.

[0012] In an alternative embodiment, a sealing ring is provided on the circumferential side of the electromagnetic chuck, and the sealing ring is used to seal the gap between the electromagnetic chuck and the inner wall of the detection main pipe.

[0013] In an alternative embodiment, the detection main pipe is made of plastic.

[0014] In an alternative embodiment, a wiring hole is provided at the upper end of the detection main pipe.

[0015] The adsorption port of the detection main pipe of the tooling for detecting the welding tightness of the sealed aluminum nail provided by the present utility model can correspond to the liquid injection hole. By connecting the negative pressure adsorption device with the detection auxiliary pipe, a negative pressure state is created inside the detection main pipe. The electromagnetic chuck is used to adsorb the glue nail body of the sealed aluminum nail, causing the glue nail body to move upward, creating a gap between the liquid injection hole and the glue nail body, enabling helium to move above the glue nail body. If there is a gap in the welding of the sealed aluminum nail, helium can enter the detection main pipe through the gap, thereby determining whether the sealing cover plate of the sealed aluminum nail is well welded to the battery cover plate.

[0016] The present utility model provides a helium detection system, including the tooling for detecting the welding tightness of the sealed aluminum nail according to any one of the foregoing embodiments.

[0017] In an alternative embodiment, it further includes a helium detection device, and the helium detection device is connected to the detection auxiliary pipe.

[0018] Compared with the prior art, the helium detection system provided by the present utility model has the tooling for detecting the welding tightness of the sealed aluminum nail provided by the present utility model, and thus has all the beneficial effects of the tooling for detecting the welding tightness of the sealed aluminum nail provided by the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of the tooling for detecting the welding tightness of the sealed aluminum nail provided by the embodiment of the present utility model;

[0021] Figure 2 For Figure 1 It is a schematic structural diagram of the A - A cross - section of the tooling for detecting the welding tightness of the sealed aluminum nail shown;

[0022] Figure 3 For Figure 1 the structural schematic diagram of the electromagnetic chuck of the tooling for detecting the welding tightness of the sealed aluminum nail as shown;

[0023] Figure 4 For Figure 1 the structural schematic diagram of the sealing nozzle of the tooling for detecting the welding tightness of the sealed aluminum nail as shown;

[0024] Figure 5 the structural schematic diagram of the longitudinal section of the sealed aluminum nail used in conjunction with the tooling for detecting the welding tightness of the sealed aluminum nail provided by the embodiment of the present utility model;

[0025] Figure 6 For Figure 5 the partial enlarged view of B of the structural schematic diagram of the longitudinal section of the sealed aluminum nail as shown;

[0026] Figure 7 the structural schematic diagram of the battery cover plate of the prior art.

[0027] Icon: 100 - Detection main pipe; 200 - Detection auxiliary pipe; 300 - Electromagnetic chuck; 400 - Sealing nozzle; 500 - Wiring hole; 600 - Circular opening; 700 - Mounting post; 800 - Sealing cover plate; 801 - First mounting groove; 900 - Spring piece; 110 - Glue nail body; 111 - Column sealing section; 1111 - First clamping groove; 1112 - Spiral groove; 120 - Battery cover plate; 130 - Liquid injection hole. Detailed implementation manners

[0028] The terms "first", "second", "third", etc. are only used for distinguishing descriptions, do not represent the serial number of arrangement, and cannot be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0030] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "inside", "outside", "left", "right", "up", "down", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0031] In the description of the present application, unless otherwise clearly defined and limited, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components.

[0032] The technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0033] Refer to Figures 1 - 7 , the present utility model provides a tool for detecting the welding tightness of a sealed aluminum nail, including a detection main pipe 100 and a detection auxiliary pipe 200, and the detection auxiliary pipe 200 is connected and communicated with the detection main pipe 100;

[0034] One end of the detection main pipe 100 has an adsorption port, and the adsorption port is communicated with the detection auxiliary pipe 200; an electromagnetic chuck 300 is arranged in the detection main pipe 100;

[0035] The adsorption port is used to abut against the liquid injection hole 130 of the battery cover plate 120, the electromagnetic chuck 300 is used to magnetically attract the sealed aluminum nail on the battery cover plate 120, and the detection auxiliary pipe 200 is used to connect with a negative pressure device.

[0036] In some embodiments, the tool for detecting the welding tightness of the sealed aluminum nail is applied to a corresponding battery cover plate assembly, and the battery cover plate assembly has an integrated automatic rebound type sealing rubber nail. Refer to Figure 5 , Figure 6 and Figure 7 , the integrated automatic rebound type sealing rubber nail includes a sealing cover plate 800, a spring piece 900 and a rubber nail body 110; the sealing cover plate 800, the spring piece 900 and the rubber nail body 110 cooperate to form an integrated structure;

[0037] A first installation groove 801 is arranged on the lower end surface of the sealing cover plate 800; the spring piece 900 is assembled in the first installation groove 801, and the edge of the outer circumference of the spring piece 900 is connected with the sealing cover plate 800; a first clamping groove 1111 is arranged on the outer circumference of the rubber nail body 110, and the inner ring of the spring piece 900 is clamped in the first clamping groove 1111; the rubber nail body 110 includes a columnar sealing section 111, and the columnar sealing section 111 is used for interference fitting in the liquid injection hole 130 and sealing the liquid injection hole 130; a spiral groove 1112 is arranged on the circumferential side of the columnar sealing section 111, and the upper end of the spiral groove 1112 is communicated with the first clamping groove 1111, and the other end extends outside the columnar sealing section 111.

[0038] The material of the sealing cover plate 800 of the integrated automatic rebound sealing glue nail is generally aluminum, and the material of the glue nail body 110 is plastic, or it can be other materials; the outer ring of the spring piece 900 is welded in the first installation groove 801 on the sealing cover plate 800, and the inner ring of the spring piece 900 is clamped in the first clamping groove 1111.

[0039] A spiral groove 1112 is arranged on the circumferential side of the glue nail body 110. The upper end of the spiral groove 1112 is arranged at the lower end of the first clamping groove 1111, and the other end extends to the outside of the columnar sealing section 111; in this way, when performing helium leak detection, the electromagnetic chuck 300 can suck and move the spring piece 900 upward, which can drive the lower part of the glue nail body 110 to move upward, and the helium gas in the battery can flow to the upper end of the glue nail body 110 through the spiral groove 1112; then, by detecting the amount of helium gas, it can be determined whether the welding of the sealing cover plate 800 and the battery cover plate 120 is qualified; this avoids being unable to judge whether the welding of the sealing cover plate 800 and the battery cover plate 120 is qualified due to the glue nail body 110 sealing the liquid injection hole 130 during helium leak detection.

[0040] After the helium leak detection is completed, the electromagnetic chuck 300 is removed, and the glue nail body 110 is reset under the action of the spring piece 900, so that the glue nail body 110 seals the liquid injection hole 130; the integrated automatic rebound sealing glue nail has a rebound effect, so that the sealing section seals the liquid injection hole 130, realizing the sealing of the liquid injection hole 130, so that the welding condition of the external sealing cover plate 800 can be detected, ensuring that the secondary battery is in a sealed state.

[0041] Refer to Figure 2 and Figure 4 In an alternative embodiment, a sealing nozzle 400 is provided at the adsorption port, and the sealing nozzle 400 is screwed onto the detection main pipe 100.

[0042] In an alternative embodiment, the material of the sealing nozzle 400 is silicone.

[0043] In an alternative embodiment, the sealing nozzle 400 has a circular opening 600, and the inner diameter of the circular opening 600 is larger than the inner diameter of the liquid injection hole 130.

[0044] When the tool for detecting the sealing performance of the sealed aluminum nail welding is frequently used, after the sealing nozzle 400 is worn, replace the sealing nozzle 400; when the tool for detecting the sealing performance of the sealed aluminum nail welding is used, the circular opening 600 of the sealing nozzle 400 corresponds to the liquid injection hole 130 on the battery cover plate 120. Since the sealing nozzle 400 is made of silica gel, the sealing nozzle 400 can well correspond to the liquid injection hole 130 and seal the gap between the sealing nozzle 400 and the battery cover plate 120; connect the negative pressure device to the detection auxiliary pipe 200, and the negative pressure device extracts the gas in the detection main pipe 100 and makes the detection main pipe 100 in a negative pressure state; after the electromagnetic chuck 300 is energized, it magnetically attracts the spring piece 900, and after the spring piece 900 drives the glue nail body 110 upward, at this time, helium can enter the upper end of the glue nail body 110 from the liquid injection hole 130; weld the sealing cover plate 800 of the sealed aluminum nail to the battery cover plate 120; when the welding is poor, helium can enter the detection main pipe 100 and then enter the detection auxiliary pipe 200 and then enter the helium detection device, and determine whether the welding of the sealing cover plate 800 and the battery cover plate 120 is qualified by detecting the amount of helium.

[0045] In an alternative embodiment, an installation hole is provided in the detection main pipe 100, and an installation post 700 matching the installation hole is provided on the electromagnetic chuck 300, and the electromagnetic chuck 300 is connected to the detection main pipe 100 through the installation post 700.

[0046] The electromagnetic chuck 300 is detachably connected to the detection main pipe 100. After the electromagnetic chuck 300 is energized, it generates magnetic force. When the electromagnetic chuck 300 is powered off, it loses magnetic force; when the electromagnetic chuck 300 generates magnetic force, the electromagnetic chuck 300 can magnetically attract the spring piece 900. When the electromagnetic chuck 300 loses magnetic force, the spring piece 900 reseals the liquid injection hole 130 with the glue nail body 110.

[0047] An installation post 700 is provided on the electromagnetic chuck 300, and an installation hole is provided on the detection main pipe 100. The installation post 700 is screwed into the installation hole, that is, the electromagnetic chuck 300 is assembled in the detection main pipe 100; the electrical connection between the electromagnetic chuck 300 and the detection main pipe 100 is similar to the connection between a light bulb and a lamp socket, and the electrical connection between the electromagnetic chuck 300 and the detection main pipe 100 is realized.

[0048] In an alternative embodiment, a sealing ring is provided on the periphery of the electromagnetic chuck 300, and the sealing ring is used to seal the gap between the electromagnetic chuck 300 and the inner wall of the detection main pipe 100.

[0049] In an alternative embodiment, the detection main pipe 100 is made of plastic.

[0050] In an alternative embodiment, a wiring hole 500 is provided at the upper end of the detection main pipe 100.

[0051] One or more sealing rings are arranged on the circumferential side of the electromagnetic chuck 300. The seal is used to seal the gap between the electromagnetic chuck 300 and the inner wall of the detection main pipe 100, so as to prevent gas from entering the detection main pipe 100 through the gap between the circumferential side of the electromagnetic chuck 300 and the inner wall of the detection main pipe 100, which may affect the helium leak detection.

[0052] The material of the detection main pipe 100 is generally plastic or other non-ferromagnetic materials; the electromagnetic chuck 300 cannot magnetically attract the detection main pipe 100.

[0053] The adsorption port of the detection main pipe 100 of the tooling for detecting the welding tightness of the sealed aluminum nail provided by the present utility model can correspond to the liquid injection hole 130. The negative pressure adsorption device is connected to the detection auxiliary pipe 200 to make the inside of the detection main pipe 100 in a negative pressure state. The electromagnetic chuck 300 is used to adsorb the glue nail body 110 of the sealed aluminum nail, so that the glue nail body 110 moves upward, creating a gap between the liquid injection hole 130 and the glue nail body 110, enabling helium to move above the glue nail body 110. If there is a gap in the welding of the sealed aluminum nail, helium can enter the detection main pipe 100 from the gap, thereby determining whether the sealing cover plate 800 of the sealed aluminum nail is well welded to the battery cover plate 120.

[0054] The present utility model provides a helium detection system, including the tooling for detecting the welding tightness of the sealed aluminum nail according to any one of the foregoing embodiments.

[0055] In an alternative embodiment, it further includes a helium detection device, and the helium detection device is connected to the detection auxiliary pipe 200.

[0056] In some embodiments, the helium detection device of the helium detection system is connected to the detection auxiliary pipe 200. The helium detection device can extract the gas in the detection auxiliary pipe 200 and detect the gas, and determine whether the welding of the sealing cover plate 800 and the battery cover plate 120 is qualified by detecting the amount of helium; this avoids the situation where it is impossible to determine whether the welding of the sealing cover plate 800 and the battery cover plate 120 is qualified during helium leak detection due to the glue nail body 110 sealing the liquid injection hole 130.

[0057] Compared with the prior art, the helium detection system provided by the present utility model has the tooling for detecting the welding tightness of the sealed aluminum nail provided by the present utility model, and thus has all the beneficial effects of the tooling for detecting the welding tightness of the sealed aluminum nail provided by the present utility model.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tool for detecting the welding tightness of sealed aluminum nails, characterized in that It includes a detection main pipe (100) and a detection auxiliary pipe (200), and the detection auxiliary pipe (200) is connected and communicated with the detection main pipe (100); One end of the detection main pipe (100) has an adsorption port, and the adsorption port is communicated with the detection auxiliary pipe (200); an electromagnetic chuck (300) is arranged in the detection main pipe (100); The adsorption port is used to abut against the liquid injection hole (130) of the battery cover plate (120), the electromagnetic chuck (300) is used to magnetically attract the sealing aluminum nail on the battery cover plate (120), and the detection auxiliary pipe (200) is used to connect with a negative pressure device.

2. The tooling for detecting the welding tightness of sealed aluminum nails according to claim 1, characterized in that, A sealing nozzle (400) is arranged at the adsorption port, and the sealing nozzle (400) is screwed on the detection main pipe (100).

3. The tooling for detecting the welding tightness of sealed aluminum nails according to claim 2, characterized in that, The material of the sealing nozzle (400) is silica gel.

4. The tool for detecting the welding tightness of the sealed aluminum nails according to claim 2, characterized in that The sealing nozzle (400) has a circular opening (600), and the inner diameter of the circular opening (600) is larger than the inner diameter of the liquid injection hole (130).

5. The tooling for detecting the welding tightness of sealed aluminum nails according to claim 1, characterized in that An installation hole is arranged in the detection main pipe (100), and an installation column (700) matching the installation hole is arranged on the electromagnetic chuck (300), and the electromagnetic chuck (300) is connected with the detection main pipe (100) through the installation column (700).

6. The tooling for detecting the welding tightness of the sealed aluminum nails according to claim 1, characterized in that, A sealing ring is arranged on the periphery of the electromagnetic chuck (300), and the sealing ring is used to seal the gap between the electromagnetic chuck (300) and the inner wall of the detection main pipe (100).

7. The tooling for detecting the welding tightness of sealed aluminum nails according to claim 1, characterized in that The material of the detection main pipe (100) is plastic.

8. The tooling for detecting the welding tightness of sealed aluminum nails according to claim 1, characterized in that, A wiring hole (500) is arranged at the upper end of the detection main pipe (100).

9. A helium detection system, characterized in that, It includes the tooling for detecting the welding tightness of the sealing aluminum nail according to any one of claims 1-8.

10. The helium detection system according to claim 9, characterized in that, It further includes a helium detection device, and the helium detection device is connected with the detection auxiliary pipe (200).

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