Dust removal device for battery welding

Abstract

The battery welding dust removal device comprises a dust removal pipeline for laser to penetrate through, the bottom end of the dust removal pipeline is detachably connected with a dust removal cover in a floating mode, and the diameter of an opening in the top end of the dust removal cover is larger than that of an opening in the bottom end of the dust removal pipeline. A dust removal opening communicated with the interior of the dust removal pipeline is formed in the upper part of the side surface of the dust removal pipeline. According to the utility model, the risk of short circuit caused by the fact that metal powder splashed outwards during welding is splashed to the battery cover plate can be effectively shielded through the structure of the dust removal cover in floating connection, and the structure in floating connection plays a role in buffering and supporting contact when the dust removal cover is in contact with a connecting piece to be welded.

Description

Technical Field

[0001] The utility model relates to the technical field of battery welding dust removal, in particular to a battery welding dust removal device. Background Art

[0002] In the production process of prismatic lithium batteries, the tabs and connecting pieces on the battery cells need to be welded to the battery cover to connect the guide posts on the cover to the battery cells. Laser welding is usually used in the existing technology.

[0003] Laser welding dust removal device for existing battery connecting piece and battery cover, such as Figure 1 As shown, it includes an upper dust removal pipe 100, a lower dust removal pipe 200, and a dust removal duct 300. The principle is: when the cover plate and the connecting piece are placed in the welding tooling, press the start switch button, the cover plate and the connecting piece tooling are moved to the exact position under the laser head through the slide rail, and the dust removal device is driven downward by the cylinder, and the lower dust removal port is in contact with the surface of the connecting piece; then the laser head emits a laser to weld the connecting piece and the battery cover together. After the welding step is completed, the dust removal device is automatically lifted, and the cover plate and the connecting piece move out with the tooling. The employee can take the welded cover plate, replace the next cover plate and connecting piece and repeat the above action. During the process, the dust removal pipe continues to absorb dust.

[0004] In the above-mentioned laser welding dust removal device, the upper dust suction port is completely open, and some air volume will be lost during the dust suction process, reducing the dust removal effect; the upper and lower dust removal pipes are perpendicular to the dust removal pipe that passes through the laser, and the dust removal pipes have an arc, which will affect the dust suction wind speed; the rectangular upper part of the dust removal pipe and the square lower part of the dust removal pipe have larger spaces, which are easy to store powder and dust, and vortices will be generated at the four corners to increase wind resistance and reduce the dust removal effect. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies and defects of the prior art and to provide a battery welding dust removal device, in particular to a laser welding dust removal device for a battery connecting piece and a battery cover.

[0006] A battery welding dust removal device includes a dust removal pipe for transmitting laser light, a dust cover detachably floatingly connected to the bottom end of the dust removal pipe, a top opening diameter of the dust cover larger than the bottom opening diameter of the dust removal pipe, and a dust removal port communicating with the interior of the dust removal pipe on the upper side of the dust removal pipe.

[0007] The upper end of the dust removal duct is open, and an upper sealing plate with a laser transparent sheet is detachably arranged on the upper part of the dust removal duct.

[0008] Wherein, a mounting slot is arranged on the dust removal duct, and the upper sealing plate is detachably mounted in the mounting slot.

[0009] Wherein, the dust removal port is arranged to be tilted upward, and the dust removal port includes an upper dust removal port and a lower dust removal port, and the upper dust removal port and the lower dust removal port are arranged spaced apart from each other; the axes of the upper dust removal port and the lower dust removal port are parallel.

[0010] Wherein, the upper dust removal port and the lower dust removal port are tubular bodies with circular cross-sections.

[0011] The cross section of the dust removal duct is an oblong hole structure, which is formed by flattening a conical cylinder, and the outer edge of the top end is larger than the outer edge of the bottom end.

[0012] Wherein, the lower outer wall of the dust removal duct is connected to the inner wall of the dust removal cover through an elastic buffer device.

[0013] In which, the elastic buffer device includes at least two relatively arranged connecting rings on the lower outer wall of the dust removal duct, and an internal threaded part corresponding to the inner wall of the dust removal cover, two positioning pins and two elastic buffers. The two positioning pins each pass through one of the connecting rings and are threadedly connected to an internal threaded part respectively. There are two positioning pin sets, and the elastic buffer is located between the connecting ring and the internal threaded hole.

[0014] Wherein, the elastic buffer adopts a spring.

[0015] Wherein, the dust removal cover is funnel-shaped or conical-cylinder-shaped, and the diameter of the top end is larger than the diameter of the bottom end.

[0016] The battery welding dust removal device of the present invention can effectively block the metal powder flying outward during welding from splashing onto the battery cover plate and causing the risk of short circuit through the structure of the floating connection dust removal hood. The floating connection structure plays a buffering and supporting contact role when the dust removal hood contacts the connecting piece to be welded, which can prevent the laser-transmitting dust removal pipe and the dust removal hood from being completely closed, avoiding the formation of a closed space and preventing damage to the dust collector. The upper opening of the dust removal pipe is sealed by the upper sealing plate with a laser-transmitting piece, which can prevent part of the dust removal air volume from being lost from the upper opening of the dust removal pipe, indirectly increasing the dust removal air volume and optimizing the dust removal effect. The dust removal port is arranged at an angle to change the dust suction wind direction, reduce the wind resistance during dust suction, and achieve vertical dust suction as much as possible, thereby maximizing the wind speed and dust removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a welding dust removal device under the prior art.

[0018] Figure 2 yes Figure 1 Schematic top view of .

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the battery welding dust removal device of the present invention.

[0020] Figure 4 This is an enlarged view of the quick-change structure of the battery welding dust removal device of the present invention.

[0021] Figure 5 This is an exploded view of the battery welding dust removal device of the present invention.

[0022] Figure 6 This is a schematic diagram of the layout of the battery welding dust removal device of the utility model when it is working.

[0023] Among them: 1 upper dust removal port; 2 lower dust removal port; 3 dust removal duct; 4 upper port sealing plate; 5 dust removal cover; 6 positioning pin; 7 connecting ring; 8 elastic buffer; 9 battery cover; 10 connecting piece; 11 welding tooling. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] See also Figures 3 to 6 As shown, a battery welding dust removal device in the utility model includes a dust removal pipe 3 for transmitting laser, and the bottom end of the dust removal pipe is detachably floatingly connected with a dust removal cover 5, the top opening diameter of the dust removal cover is larger than the diameter of the bottom opening of the dust removal pipe, and the upper side of the dust removal pipe is provided with a dust removal port connected to the interior of the dust removal pipe 3.

[0026] In some embodiments, the upper end of the dust removal duct 3 is open, and a top cover plate 4 with a laser transparent sheet is detachably arranged on the upper portion of the dust removal duct. The laser transparent sheet can be a corresponding glass sheet.

[0027] In some embodiments, the dust removal duct 3 is provided with an installation slot, and the upper sealing plate 4 is detachably installed in the installation slot. The upper sealing plate 4 is made into a pull-out structure through the installation slot, which is convenient for removal and installation, and convenient for maintenance and cleaning. The upper sealing plate 4 can be provided with an insertion hole for a glass lens, so that the glass lens can be loaded into the upper sealing plate through the reserved hole, which is convenient for replacement. Since the metal welding slag generated during welding may splash onto the glass lens, the pulling method can facilitate the regular replacement of the protective lens, thereby improving the efficiency of cleaning and maintenance. Moreover, because the upper sealing plate 4 with a glass lens is added, the upper opening of the dust removal channel 3 is blocked, preventing a part of the dust removal air volume from being lost from the upper opening of the dust removal channel 3, indirectly increasing the dust removal air volume and optimizing the dust removal effect, thereby increasing the dust suction wind speed and the dust removal effect. By using an anemometer to test, the improved dust removal wind speed increased from 5.5m / s to 28m / s.

[0028] In some embodiments, the dust removal port is arranged at an upward angle, and includes an upper dust removal port 1 and a lower dust removal port 2 for connection to a vacuum cleaner tube to collect dust. The upper dust removal port and the lower dust removal port are arranged spaced apart from each other; the axes of the upper dust removal port and the lower dust removal port are parallel. More preferably, the upper dust removal port 1 and the lower dust removal port 2 are installed on the same side of the dust removal duct 3. For aerodynamic applications, the configuration of two dust removal ports on the same side can better concentrate power on a single area compared to configurations on both sides, providing a more efficient cleaning effect. The dust removal port is inclined, which can change the dust collection wind direction, reduce wind resistance during dust collection, and achieve vertical dust collection as much as possible, maximizing wind speed and dust removal effect.

[0029] In some embodiments, the upper dust removal port and the lower dust removal port are tubular bodies with circular cross-sections.

[0030] In some embodiments, the cross-section of the dust removal duct is an oblong hole-shaped structure, which is formed by flattening a conical cylinder. The outer edge of the top is larger than the outer edge of the bottom. This can avoid the defects of vortices generated at the four corners of the square and rectangular duct cross-sections, increase wind resistance, affect the dust removal effect, and easily accumulate powder. It can reduce wind resistance, enhance the dust removal effect, and prevent powder accumulation.

[0031] In some embodiments, the lower outer wall of the dust removal duct is connected to the inner wall of the dust removal hood by an elastic buffer device. More preferably, the elastic buffer device includes at least two relatively arranged connecting rings on the lower outer wall of the dust removal duct, and internal threaded parts corresponding to the inner wall of the dust removal hood, two positioning pins and two elastic buffers 8. The two positioning pins 6 are each threadedly connected to an internal threaded part after passing through one of the connecting rings 7. There are two sets of positioning pins 6, and the elastic buffer 8 is located between the connecting ring 7 and the internal threaded hole. In the embodiment of the present application, when in use, the welding dust removal device of the embodiment of the present application is driven by the cylinder to move toward the connecting piece. When welding, the dust removal hood 6 will press on the surface of the connecting piece. When the dust removal hood contacts the surface of the connecting piece, since the elastic buffer 8 is sleeved on the positioning pin 6, during the downward pressing process, the elastic buffer 8 will be deformed by the squeezing of the connecting ring 7, playing a role of buffering and supporting, which can prevent the dust removal duct through which the laser passes and the dust removal hood from completely closing, avoiding the formation of a closed space, and preventing damage to the dust collector.

[0032] In the embodiment of the present application, the dust hood and the dust removal duct are made into separate parts, and the two parts are connected by an elastic buffer device. They are connected or disassembled through the threads on the surface of the locating pin and the screw holes on the inner wall of the dust hood, which makes it easy to disassemble and clean metal foreign matter splashed on the inside of the dust removal duct during welding.

[0033] Among them, the connecting ring 7 is fixed on both sides of the dust removal pipe 3 by welding, the positioning pin 6 passes through the connecting ring 7, the elastic buffer 8 is sleeved on the positioning pin 6, and the positioning pin 6 is then connected and fixed with the internal thread part on the inner wall of the dust removal cover 5 through the surface thread.

[0034] In some embodiments, the elastic buffer is a spring or a similar elastic mechanism, such as a rubber sleeve.

[0035] The dust cover is funnel-shaped or conical, with a larger diameter at the top than at the bottom. The funnel-shaped dust cover completely encloses the dust collection duct, blocking any metal shavings that might fly through the spring and onto the battery cover, preventing them from splashing onto the battery cover and potentially causing a short circuit.

[0036] In some embodiments, the dust removal duct is provided with an air pipe (not shown) connected to blow nitrogen. Since nitrogen has very stable chemical properties, it can effectively prevent the metal from chemically reacting with oxygen at high temperatures during the metal welding process, which not only ensures the quality of welding, but also has a cooling effect.

[0037] When the welding device of the embodiment of the present application is used, the laser enters from top to bottom through the dust removal pipe to perform welding work. The welding dust removal device is fixedly installed on the laser welding platform. The welding dust removal device is fixedly connected to the cylinder by welding. The welding dust removal device can be moved up and down by the cylinder. When not welding, the welding tool 11 for placing the cover and the connecting piece is outside the welding equipment. The battery cover 9 and the connecting piece 10 are placed in the welding tool 11, and the start switch button is pressed. The welding tool 11 automatically moves to the exact position under the laser head through the slide rail. After the sensor receives the signal, the cylinder drives the welding dust removal device to move and press down in the direction of the connecting piece, and presses the dust cover 5 on the surface of the connecting piece 10. Since the elastic buffer 8 is sleeved on the positioning pin 6, the positioning pin 6 passes through the connecting ring 7 and is fixed on the dust cover 5 through the threaded hole. During the downward pressing process, the elastic buffer 8 will be deformed by the extrusion of the connecting ring 7, which plays a buffering and supporting role; then the laser head emits a laser to weld the connecting piece 10 and the battery cover 9 together. After the welding step is completed, the welding dust removal device is automatically lifted, and the battery cover 9 and the connecting piece 10 are moved out of the welding equipment with the welding tool 11. The employee can take the welded battery cover 9, replace the next battery cover 9 and the connecting piece 10 and repeat the above actions, and continue to vacuum during the process.

[0038] The welding dust removal device of the embodiment of the present application is used to improve the dust removal effect of the laser welding dust removal device of the connecting plate and the battery cover. It can maximize the wind speed and dust removal effect, and can avoid the formation of a closed space to cause damage to the dust collector; the funnel-type dust hood can prevent metal chips after welding from splashing onto the battery cover or other places, which may cause the risk of short circuit. The dust removal duct and the dust removal hood are made into separate structures and adopt a detachable design with threaded connection, which is convenient for cleaning metal chips on the dust removal hood, making the tooling structure simple without affecting laser welding, and can also increase the dust removal wind speed to optimize the dust removal effect.

[0039] The basic principles, main features and advantages of the present invention are shown and described above. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention.

[0040] Therefore, no matter from which point of view, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of equivalent elements of the claims are included in the present invention.

[0041] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. Battery welding dust removal device, characterized in that, It includes a dust removal pipe for transmitting laser light, the bottom end of the dust removal pipe is detachably and floatingly connected to a dust removal cover, the top opening diameter of the dust removal cover is larger than the bottom opening diameter of the dust removal pipe, and the upper side of the dust removal pipe is provided with a dust removal port that communicates with the interior of the dust removal pipe.

2. The battery welding dust removal device according to claim 1, characterized in that: The upper end of the dust removal pipe is open, and an upper sealing plate with a laser transparent sheet is detachably arranged on the upper part of the dust removal pipe.

3. The battery welding dust removal device according to claim 2, characterized in that: An installation slot is arranged on the dust removal duct, and the upper sealing plate is detachably installed in the installation slot.

4. The battery welding dust removal device according to claim 3, characterized in that: The dust removal port is arranged to be tilted upward, and the dust removal port includes an upper dust removal port and a lower dust removal port. The upper dust removal port and the lower dust removal port are arranged spaced apart from each other, and the axes of the upper dust removal port and the lower dust removal port are parallel.

5. The battery welding dust removal device according to claim 4, characterized in that: The upper dust removal port and the lower dust removal port are tubular bodies with circular cross-sections.

6. The battery welding dust removal device according to claim 1, characterized in that: The cross section of the dust removal duct is an oblong hole structure, which is formed by flattening a conical cylinder, and the outer edge of the top end is larger than the outer edge of the bottom end.

7. The battery welding dust removal device according to claim 1, characterized in that: The lower outer wall of the dust removal duct is connected to the inner wall of the dust removal cover through an elastic buffer device.

8. The battery welding dust removal device according to claim 7, characterized in that: The elastic buffer device includes at least two relatively arranged connecting rings on the lower outer wall of the dust removal pipe, and an internal threaded part corresponding to the inner wall of the dust removal cover, two positioning pins and two elastic buffers. The two positioning pins each pass through a connecting ring and are threadedly connected to an internal threaded part respectively. There are two positioning pins in the set, and the elastic buffer is located between the connecting ring and the internal threaded hole.

9. The battery welding dust removal device according to claim 7, characterized in that: The elastic buffer adopts a spring.

10. The battery welding dust removal device according to claim 1, characterized in that: The dust removal cover is funnel-shaped or conical-cylinder-shaped, and the diameter of the top end is larger than the diameter of the bottom end.

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