Welding mark protection device

Abstract

The utility model provides a welding mark protection device. The welding mark protection device comprises a protection cover and a paint spraying unit, wherein the protection cover covers a welding mark; a cavity for accommodating the welding marks is formed in the protective cover; the paint spraying unit can be driven to move to the position above the protective cover, the paint spraying unit is provided with a spraying head capable of stretching into the cavity, and the spraying head is used for spraying paint on the welding marks. The welding mark protection device can spray paint to a welding mark position, a protection paint film is formed at the welding mark position, protection of the welding mark is achieved, and therefore the problems that in the prior art, in the rubberizing process, an adhesive tape falls off, in the dispensing process, the thickness of an adhesive film is large, and wire drawing machine equipment is complex can be solved. Therefore, not only can welding marks be well protected, but also good insulativity and use effect are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery manufacturing, in particular to a welding mark protection device. Background Art

[0002] In the production process of lithium-ion batteries, the laser welding process is used to weld the tabs and cover plates or the connecting pieces and cover plates. The weld marks after laser welding need to be protected to prevent the welding slag from falling off and being oxidized. The falling welding slag has the risk of puncturing the diaphragm and causing the battery cell to short-circuit and catch fire. The oxidation of the weld marks has the risk of causing a large temperature rise and insufficient overcurrent, which in turn leads to a decrease in battery cell performance.

[0003] There are two commonly used methods for protecting laser welding weld marks: one method is to stick a layer of protective tape on the weld mark to cover it. The other method is to apply a layer of glue on the weld mark to cover it.

[0004] However, the adhesive tape structure reduces its viscosity as the electrolyte soaking time increases, which may cause the tape to fall off and cannot provide protection after it falls off. The glue point structure has a volcanic crater shape and thick edges, which affects the bending space. Wiredrawing is likely to occur after glue point, and the glue gun is prone to clogging if it is stopped for more than 1 hour. Accelerated curing equipment is required when the glue is cured, which has high manufacturing costs. Utility Model Content

[0005] In view of this, the utility model aims to provide a weld mark protection device, so as to be able to spray a protective paint film on the weld mark surface, thereby facilitating better protection of the weld mark.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A welding mark protection device comprises a protective cover arranged on the welding mark, and a paint spraying unit;

[0008] The protective cover is provided with a cavity for accommodating the welding mark;

[0009] The paint spraying unit can be driven to move above the protective cover, and the paint spraying unit has a spray head that can extend into the cavity, and the spray head is used to spray paint on the weld print.

[0010] Furthermore, the paint spraying unit includes a paint storage bin, and the spray head is provided at the bottom of the paint storage bin.

[0011] Furthermore, the paint storage bin is provided with a control device for adjusting the amount of paint sprayed by the spray head and / or the spray width.

[0012] Furthermore, the spray heads are multiple and are arranged at intervals on the bottom of the paint storage bin.

[0013] Furthermore, the protective cover is provided with a dust removal port for connecting a dust removal device, and the dust removal device is used to remove dust from the cavity.

[0014] Furthermore, the weld mark is in the shape of a long strip; in the length direction of the weld mark, the distance H1 between the inner wall of the cavity and the end edge of the weld mark is between 0.5 mm and 3 mm; and / or, in the width direction of the weld mark, the distance H2 between the inner wall of the cavity and the side edge of the weld mark is between 0.5 mm and 3 mm.

[0015] Furthermore, the weld mark protection device also includes a paint film drying device, and the paint film drying device is used to dry the sprayed paint film.

[0016] Furthermore, it also includes a driving device, a connecting frame is provided at the power output end of the driving device, and the paint film drying device and the paint spraying unit are respectively arranged at both ends of the connecting frame; the connecting frame can move between a first position and a second position, when in the first position, the nozzle of the paint spraying unit is located above the weld mark, and when in the second position, the paint film drying device is located above the weld mark after painting.

[0017] Furthermore, the paint film drying device includes a heating lamp tube.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The weld mark protection device described in the utility model has a protective cover arranged on the weld mark and a paint spraying unit for spraying paint on the weld mark position, so that the weld mark position is sprayed with paint and a paint film is formed, and the weld mark is protected by the paint film, thereby solving the problems of tape falling off in the gluing process, thick film thickness in the gluing process, and complex wire drawing and equipment in the prior art, thereby not only being able to better protect the weld mark, but also having good insulation and use effect.

[0020] In addition, the setting of the paint storage bin is conducive to the storage of paint and the timely spraying of the nozzle to the welding and printing position. The control device set on the paint storage bin can adjust the amount of paint sprayed by the nozzle and the spray width, thereby improving the quality of painting at the welding and printing position. The nozzle is arranged in multiple intervals, which is conducive to meeting the needs of long welding and printing spraying and also helps to further ensure the quality of spraying.

[0021] Secondly, the dust removal port on the protective cover is conducive to dust removal of the weld marks in the cavity, ensuring the adhesion effect of the paint film after spraying, and improving the quality of the paint film. By limiting the distance between the end edge and the side edge corresponding to the weld marks of each side wall of the cavity, it is conducive to ensuring that the sprayed paint fully covers the weld marks, and can ensure the overall protection effect of the weld.

[0022] In addition, the paint film drying device is provided to dry the sprayed paint film, thereby facilitating the rapid solidification of the paint film. The driving device is provided to facilitate the movement of the paint spraying unit and the paint film drying device, and to improve the automation level of the equipment. The paint spraying unit and the paint film drying device are provided at both ends of the connecting frame, and the paint spraying unit and the paint film drying device are operated alternately, which is conducive to improving the spraying rhythm and improving production efficiency. The paint film drying device adopts a heating lamp tube, which has a relatively simple structure, is easy to install, and has a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0024] Figure 1 A top view of the welding mark protection device according to an embodiment of the utility model;

[0025] Figure 2 It is a left view of the welding mark protection device according to the embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the protective cover according to an embodiment of the utility model;

[0027] Figure 4 This is a schematic structural diagram of a paint spraying unit according to an embodiment of the utility model;

[0028] Description of reference numerals:

[0029] 1. Soldering station; 2. Protective cover; 3. Paint spraying unit; 4. Paint film drying device; 5. Connecting frame;

[0030] 21. Cavity; 22. Dust removal port; 30. Spray nozzle; 31. Paint storage bin; 32. Control device;

[0031] 10. Tab; 11. Welding mark; 20. Cover plate. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0033] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0036] The present embodiment relates to a weld mark protection device, which can spray a protective paint film on the surface of the weld mark 11, thereby utilizing the protective paint film to better protect the weld mark 11.

[0037] In terms of overall structure, see Figure 1 and Figure 2 As shown, the welding mark protection device of this embodiment includes a protective cover 2 which is covered on the welding mark 11, and a paint spraying unit 3. The protective cover 2 is provided with a cavity 21 for accommodating the welding mark 11. The paint spraying unit 3 can be driven to move above the protective cover 2, and the paint spraying unit 3 has a spray head 30 which can be extended into the cavity 21, and the spray head 30 is used to spray paint on the welding mark 11.

[0038] At this time, as in the above structure, the protective cover 2 can cover the weld mark 11, so that the covered area in the cavity 21 forms a painting area at the position of the weld mark 11, which can effectively prevent the paint from splashing to other positions, and after painting, a paint film is formed at the position of the weld mark 11, and the weld mark 11 is protected by the paint film, thereby solving the problems of tape falling off in the gluing process in the prior art, and the thick film thickness and wire drawing and complex equipment in the gluing process. Therefore, not only can the weld mark 11 be better protected, but also it has good insulation and use effect.

[0039] It should be noted that the welding mark protection device of this embodiment can protect the welding mark 11 after the laser welding process is used between the tab 10 and the cover plate 20, or it can protect the welding mark 11 after the laser welding process is used between the connecting piece and the cover plate 20. Of course, it can be understood that it can also protect the welding mark 11 after other structural parts are welded.

[0040] For more details, see Figure 1 and Figure 2 , and combined with Figure 3 As shown, as a preferred embodiment, in this embodiment, the protective cover 2 is in the shape of a long strip in the overall structure, and the protective cover 2 is formed by a plurality of side panels connected in sequence, and a cavity 21 is formed between the plurality of side panels. When in use, the protective cover 2 is placed on two welded components, and the weld mark 11 between the two components is located in the cavity 21, and the projection of the cavity 21 on the plane where the weld mark 11 is located forms a spray painting area.

[0041] See also Figure 1 As shown, the weld mark of this embodiment is in the shape of a long strip, and in the length direction of the weld mark, the distance H1 between the inner wall of the cavity 21 and the end edge of the weld mark 11 is between 0.5mm-3mm, and in the width direction of the weld mark, the distance H2 between the inner wall of the cavity 21 and the side edge of the weld mark 11 is between 0.5mm-3mm. At this time, the limitation of the distance between the side wall of the cavity 21 and the corresponding edge of the weld mark 11 is conducive to ensuring that the sprayed paint completely covers the weld mark 11, and can ensure the overall protection effect of the weld mark 11.

[0042] In specific implementation, the value of the distance H1 can be set to 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm, and the value of the distance H2 can also be set to 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm, etc. Of course, it can be understood that the value of the distance H1 and the value of the distance H2 can be set to the same value or different values, as long as it is ensured that the weld mark 11 can be fully covered.

[0043] In order to ensure the adhesion effect of the paint film after spraying and the quality of the paint film forming, in this embodiment, Figure 3 As shown, the protective cover 2 is also provided with a dust removal port 22 for connecting a dust removal device, and the dust removal device is used to remove dust from the cavity 21. Thus, the cavity 21 where the weld mark 11 is located can be dusted by the dust removal device, thereby preventing the influence of debris or dust on the paint film during painting, thereby improving the quality of the paint film forming.

[0044] It should be noted that the dust removal device can be, for example, a dust collector in the prior art, so that the dust removal pipe of the dust collector is connected to the dust removal port 22. Of course, it is understandable that the dust removal device can adopt a negative pressure dust removal method or a positive pressure blowing method. It should also be noted that the dust removal device can also be used to collect splashed paint when spraying.

[0045] Combination Figure 1 , Figure 2 and Figure 4 As shown, the paint spraying unit 3 of this embodiment includes a paint storage bin 31, and a spray head 30 is provided at the bottom of the paint storage bin 31. The setting of the paint storage bin 31 is conducive to the storage of paint, and is conducive to the spray head 30 spraying paint to the weld mark 11 position in time, ensuring the smooth progress of the paint spraying operation of the weld mark 11.

[0046] As a preferred embodiment, in this embodiment, a control device 32 for adjusting the amount of paint and / or the spray width sprayed by the nozzle 30 is provided on the paint storage bin 31. The control device 32 includes, for example, a flow meter for adjusting the amount of paint sprayed by the nozzle 30, or a spray width adjusting member for adjusting the spray width, thereby effectively ensuring the thickness of the paint sprayed at the weld mark 11 position by controlling the flow rate, spray width, and spray time of the paint.

[0047] See also Figure 4 As shown, in this embodiment, the nozzles 30 are multiple and spaced apart at the bottom of the paint storage bin 31. The arrangement of multiple nozzles 30 is conducive to meeting the demand for spraying paint on the weld print 11 with a longer length, and is also conducive to further ensuring the quality of spraying paint.

[0048] In addition, in this embodiment, still refer to Figure 1 and Figure 2 As shown, the weld mark protection device of this embodiment further includes a paint film drying device 4, which is used to dry the sprayed paint film. At this time, the setting of the paint film drying device 4 can quickly dry the sprayed paint film, thereby facilitating the rapid solidification of the paint film. In specific implementation, the paint film drying device 4 of this embodiment includes a heating lamp tube, which has a relatively simple structure, is easy to install, and has a low cost.

[0049] It is worth noting that, in addition to using a heating lamp, the paint film drying device 4 may also use a hot air blower or the like to achieve rapid curing of the paint film.

[0050] As a preferred embodiment, the weld mark protection device of this embodiment also includes a driving device not shown in the figure, and a connecting frame 5 is provided at the power output end of the driving device, and the paint film drying device 4 and the paint spraying unit 3 are respectively arranged at both ends of the connecting frame 5, and the connecting frame 5 is driven by the driving device to move between a first position and a second position. In the first position, the nozzle 30 of the paint spraying unit 3 is located above the weld mark 11, and in the second position, the paint film drying device 4 is located above the weld mark 11 after painting.

[0051] At this time, the setting of the driving device can facilitate the movement of the paint spraying unit 3 and the paint film drying device 4, and help improve the degree of automation of the equipment. In addition, the paint spraying unit 3 and the paint film drying device 4 are set at both ends of the same connecting frame 5 and driven to move by the same driving device, which can save the number of driving devices set and make the structure more compact.

[0052] When the connecting frame 5 is in the first position, the nozzle 30 is located above the weld mark 11, so as to spray paint on the weld mark 11. When the connecting frame 5 is in the second position, the paint film drying device 4 is located above the weld mark 11 after spraying paint, and can heat the paint film so that the paint film is quickly cured. This structural setting allows the painting operation of the paint spraying unit 3 and the drying operation of the paint film drying device 4 to be performed alternately, which is conducive to improving the spraying cycle and improving production efficiency.

[0053] It is worth noting that the driving device of this embodiment adopts a robot, for example, and the connecting frame 5 is connected to the execution end of the robot, which can ensure the accuracy of the moving position of the connecting frame 5 and is also conducive to improving the efficiency of painting and paint film curing.

[0054] The weld mark protection device of this embodiment is specifically used, and the weld mark 11 after the pole ear 10 and the cover plate 20 are laser welded is used as an example to explain in detail. First, after the pole ear 10 is laser welded with the cover plate 20 on the welding table 1, a weld mark 11 is formed between the pole ear 10 and the cover plate 20. Then, the weld mark 11 is covered with the protective cover 2, and the position of the protective cover 2 is adjusted so that the distance between the side wall of the protective cover 2 and the corresponding edge of the weld mark 11 meets the requirements. Then, the connecting frame 5 is moved to the first position by the driving device, and then the position of the weld mark 11 is sprayed with paint by the nozzle 30 in the paint spraying unit 3. After the painting is completed, the driving device drives the connecting frame 5 to move to the second position, and then the paint film on the weld mark 11 is dried and cured by the paint film drying device 4.

[0055] The weld mark protection device of this embodiment protects the laser weld mark 11 by using spray paint instead of the gluing or dispensing method in the prior art. It can not only solve the problems of tape falling off in the gluing process in the prior art, thick film thickness in the dispensing process, complex wire drawing and equipment, etc., but also can better protect the weld mark 11, and at the same time has good insulation and use effect.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding mark protection device, characterized in that: It includes a protective cover provided on the welding print, and a painting unit; The protective cover is provided with a cavity for accommodating the welding mark; The paint spraying unit can be driven to move above the protective cover, and the paint spraying unit has a spray head that can extend into the cavity, and the spray head is used to spray paint on the weld print.

2. The welding mark protection device according to claim 1, characterized in that: The paint spraying unit comprises a paint storage bin, and the spray head is arranged at the bottom of the paint storage bin.

3. The welding mark protection device according to claim 2, characterized in that: The paint storage bin is provided with a control device for adjusting the amount of paint sprayed from the spray head and / or the spray width.

4. The welding mark protection device according to claim 2, characterized in that: The spray heads are multiple and are arranged at intervals on the bottom of the paint storage bin.

5. The welding mark protection device according to claim 1, characterized in that: The protective cover is provided with a dust removal port for connecting a dust removal device, and the dust removal device is used to remove dust from the cavity.

6. The welding mark protection device according to claim 1, characterized in that: The weld mark is in the shape of a long strip; In the length direction of the weld, the distance H1 between the inner wall of the cavity and the edge of the weld end is between 0.5 mm and 3 mm; and / or In the width direction of the weld mark, a distance H2 between the inner wall of the cavity and the side edge of the weld mark is between 0.5 mm and 3 mm.

7. The weld mark protection device according to any one of claims 1 to 6, characterized in that: The weld mark protection device also includes a paint film drying device, and the paint film drying device is used to dry the sprayed paint film.

8. The welding mark protection device according to claim 7, characterized in that: It also includes a driving device, wherein a connecting frame is provided at the power output end of the driving device, and the paint film drying device and the paint spraying unit are respectively arranged at two ends of the connecting frame; The connecting frame can move between a first position and a second position. In the first position, the nozzle of the paint spraying unit is located above the weld mark. In the second position, the paint film drying device is located above the weld mark after painting.

9. The welding mark protection device according to claim 7, characterized in that: The paint film drying device comprises a heating lamp tube.

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