CN219336477U

CN219336477U - Laser welding visor and lithium battery laser welding equipment

Info

Publication number: CN219336477U
Application number: CN202320541807.0U
Authority: CN
Inventors: 梁建林; 汪鹏; 潘健良; 李荣强; 黄亮; 廖子阳; 黄莹
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2023-03-10
Filing date: 2023-03-10
Publication date: 2023-07-14
Anticipated expiration: 2033-03-10

Abstract

The utility model discloses a laser welding protective cover and lithium battery laser welding equipment with the laser welding protective cover, wherein the laser welding protective cover comprises a protective cover main body and at least one dust hood, the protective cover main body is provided with at least one through hole, the side wall of the through hole is provided with at least one air suction port, the dust hood is connected with an opening at one end of the through hole, the dust hood is open at one end far away from the through hole, and a light transmission piece is arranged at the opening at one end of each through hole far away from the dust hood in a sealing way. When the vacuum suction device is used, laser can penetrate through the light-transmitting part and weld workpieces positioned in the dust hood, and one end of the through hole is sealed by the light-transmitting part, so that when the vacuum suction device is vacuumized, larger suction force can be generated in the through hole and the dust hood, welding slag generated during welding can be better sucked away, the welding slag is reduced to be accumulated on the inner wall of the through hole or the inner wall of the dust hood, the influence of the welding slag on the welding workpieces is reduced, and the yield of welding products is improved.

Description

Laser welding visor and lithium battery laser welding equipment

Technical Field

The utility model relates to the technical field of lithium battery production, in particular to a laser welding protective cover and lithium battery laser welding equipment.

Background

At present, two main modes of communicating and conducting between a battery current collector and an end cover of a lithium battery applied to an electric automobile are adopted, wherein one mode is that the battery current collector is directly connected with the end cover of the lithium battery through a tab, and the other mode is that the battery current collector is connected with the end cover through a tab and a connecting sheet. In the process of producing lithium batteries, enterprises can adopt laser welding equipment to directly weld and combine the lugs of the battery current collector with the end covers, or adopt the laser welding equipment to weld the lugs of the battery current collector with the connecting sheets, and then weld and combine the connecting sheets with the end covers, but welding slag or dust can be generated in the welding process. In order to reduce the cross contamination of welding slag, dust and other parts generated in the welding process, a laser welding protective cover is generally arranged on laser welding equipment in the current industry, and the electrode lugs, the connecting sheets and the end covers to be welded are covered in the laser welding protective cover by the laser welding protective cover to form a welding area, so that the cross contamination of the welding slag and other parts generated in the welding process is avoided as much as possible.

The existing laser welding protective cover generally comprises a protective cover main body, wherein a through hole penetrating through the whole protective cover main body is formed in the protective cover main body, and an air suction port capable of being connected with external vacuum negative pressure equipment is formed in the side wall of the through hole.

When the welding device is used, the laser welding protective cover covers a workpiece to be welded in the through hole, the air suction port formed in the side wall of the through hole is connected with external vacuum negative pressure equipment, then the vacuum negative pressure equipment is started to vacuumize, laser emitted by the laser welding head of the laser welding equipment is emitted into the through hole from the other end of the through hole and welds the workpiece, welding slag generated in the welding process is blocked by the inner wall of the through hole, cross contamination of the welding slag and other parts is effectively prevented, the vacuum negative pressure equipment can suck floating welding, but the welding slag attached to the inner wall of the through hole due to too small suction force can not be sucked away, accumulated welding slag can block the laser along with the pushing of the using time, and the phenomenon of poor welding such as broken welding and high internal resistance of a battery cell occurs.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the laser welding protective cover, which can prevent welding slag from splashing and reduce the accumulation of welding slag in the laser welding protective cover.

The utility model further provides lithium battery laser welding equipment with the laser welding protective cover.

According to a first aspect of the present utility model, a laser welding protective cover is applied to a lithium battery laser welding device, and comprises: the protective cover comprises a protective cover body, a cover and a cover, wherein the protective cover body is provided with at least one through hole penetrating through the protective cover body, and the side wall of the through hole is provided with at least one air suction port; at least one dust hood, which is connected with one end of the through hole and is open, wherein the dust hood is hollow and communicated with the through hole, and one end of the dust hood far away from the through hole is open; and an opening at one end of each through hole far away from the dust hood is hermetically provided with a light-transmitting piece.

The laser welding protective cover according to the embodiment of the first aspect of the utility model has at least the following beneficial effects: the through hole is kept away from the sealed printing opacity spare that is provided with of one end opening of suction hood, during the use, the suction hood is kept away from the other end of through-hole and is hugged closely the work piece and make the work piece that waits to weld be located the suction hood inside, laser can pass printing opacity spare and weld the work piece that is located the suction hood inside, moreover because the one end of through-hole is sealed by the printing opacity spare, when consequently vacuum negative pressure equipment evacuation, can produce bigger suction in through-hole and suction hood inside, and then can suck away the welding slag that produces when welding better, reduce the welding slag and gather in through-hole inner wall or suction hood inner wall, therefore reduce the influence of welding slag to the work piece, help improving the yields of welding product.

According to some embodiments of the utility model, a placing position is arranged on the inner wall of one end of the through hole away from the dust hood, and the light-transmitting piece is embedded in the through hole and is abutted to the placing position.

According to some embodiments of the utility model, the light transmissive element is a transparent glass element.

According to some embodiments of the utility model, the side wall of the dust hood is provided with a plurality of first air passing holes at intervals.

According to some embodiments of the utility model, the dust hood is funnel-shaped or straight-cylindrical, and the first air passing holes are uniformly arranged on the side wall of the dust hood at intervals.

According to some embodiments of the utility model, at least one notch groove is formed in one end, far away from the through hole, of the dust hood, and the notch groove is communicated with the interior of the dust hood.

According to some embodiments of the utility model, the protective cover body has two mutually isolated or communicated through holes, and one end opening of each through hole is covered with the dust hood.

According to some embodiments of the utility model, the dust hood is of unitary construction with the protective cover body.

According to some embodiments of the utility model, the dust hood is detachably connected with the protective cover body.

According to a second aspect of the utility model, a laser welding device for lithium battery comprises a laser welding device body and the laser welding protective cover, wherein the laser welding protective cover is movably arranged on the laser welding device body.

The vehicle according to the embodiment of the second aspect of the utility model has at least the following advantageous effects: by adopting the laser welding protective cover, the lithium battery laser welding equipment can better absorb welding slag in the process of welding workpieces, reduce the accumulation of the welding slag on the laser welding protective cover to block laser, reduce the probability of accidental falling of the welding slag on the workpieces, and improve the yield of welded products.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of a laser welding protective cover according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the laser welded protective cover shown in FIG. 1 at another angle;

fig. 3 is a schematic view of the internal structure of the laser welding protective cover shown in fig. 1.

Reference numerals:

a protective cover main body 100, a through hole 110, a placement position 111, an air inlet 120,

A dust hood 200, a first air passing hole 210 and a notch groove 220.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 to 3, the laser welding protection cover according to the first aspect of the present utility model is applied to a lithium battery laser welding apparatus, and includes a protection cover body 100 having a substantially rectangular parallelepiped shape and a dust hood 200, and it should be noted that the shape of the protection cover body 100 may be freely designed into a cylindrical shape, a square shape, a spherical shape, or other irregular shape according to actual needs, and is not limited to a rectangular parallelepiped shape. The middle part of the protective cover main body 100 is provided with a through hole 110 penetrating through the protective cover main body 100, the side wall of the through hole 110 is provided with at least one air suction port 120, in this embodiment, the through hole 110 is a rectangular through hole, and four side walls of the rectangular through hole are provided with one air suction port 120. In use, an external vacuum negative pressure device may be connected to the four suction ports 120 via tubing. It is understood that the number of the air inlets 120 formed on the sidewall of the through hole 110 may be one, two, three or more according to the need, and may be specifically, but not limited to four according to the actual need. The dust hood 200 is covered at one end of the through hole 110, the dust hood 200 is hollow and is communicated with the through hole 110, and one end of the dust hood 200 away from the through hole 110 is open, so that the dust hood 200 can be covered at the periphery of a workpiece to be welded through the open mask, and a light transmitting piece is hermetically arranged at one end of the through hole 110 away from the dust hood 200.

Through adopting above-mentioned structure for when laser welding visor of this embodiment is used for welding the work piece, the dust hood 200 will wait to weld the work piece cover in the inside of dust hood 200, external vacuum equipment is connected with induction port 120 through the pipeline simultaneously, then start vacuum equipment and inhale the vacuum, laser that laser welding equipment during operation produced passes the printing opacity piece and welds the work piece that is located dust hood 200 inside, because the one end that the dust hood 200 was kept away from to through-hole 110 is sealed by the printing opacity piece, therefore when vacuum equipment inhales the vacuum, can produce bigger suction at through-hole 110 and dust hood 200 inside, and then the welding that produces when can sucking the welding better, reduce the welding slag accumulation through-hole 110 inner wall or dust hood 200 inner wall, avoid the welding slag to block laser welding work piece, also can prevent that the welding slag from accidentally dropping in the work piece, help improving the yields of welding product.

It should be noted that the shape of the through hole 110 may be a circle, a triangle, an ellipse, or other shapes, and is not limited to the rectangle described above.

Referring to fig. 1 and 3, in order to facilitate the installation of the light-transmitting member on the protective cover main body 100, in some embodiments of the present utility model, a rest 111 is disposed on an inner wall of an end of the through hole 110, which is far from the dust hood 200, and the light-transmitting member is embedded in the through hole 110 and abuts against the rest 111. In this embodiment, the rest 111 is a slot formed on the inner wall of the through hole 110, and only the light-transmitting member is required to be embedded into the through hole 110 and rest on the slot during installation, so that the installation is simpler and more convenient. Note that, the placement portion 111 may be a bump disposed on the inner peripheral wall of the through hole 110, and may be specifically determined according to actual needs.

In order to make the laser better pass through the transparent member and weld the workpiece located in the dust hood 200, in some embodiments of the present utility model, the transparent member is a transparent glass member, specifically, the transparent member is a transparent glass sheet matched with the shape of the through hole 110, and when the transparent glass sheet is installed, only the transparent glass sheet needs to be embedded in the through hole 110 and abutted against the rest 111. By adopting the transparent glass piece as the light-transmitting piece, the interference of the light-transmitting piece on laser can be reduced, and meanwhile, the production cost of the laser welding protective cover can be greatly reduced. Besides the transparent glass member, a transparent quartz member may be used as the transparent member, and the transparent glass member is not limited to the transparent glass member.

Further, in order to make the vacuum negative pressure apparatus better suck the welding slag, in some embodiments of the present utility model, the sidewall of the dust hood 200 is provided with a plurality of first air passing holes 210 at intervals. Specifically, the dust hood 200 has a funnel shape or a straight cylindrical shape, and the plurality of first air passing holes 210 are uniformly arranged at intervals on the sidewall of the dust hood 200. In this embodiment, the plurality of first air holes 210 have a small hole structure with a smaller diameter, and the diameter of the first air holes 210 is preferably 0.5mm to 2.5mm. Through adopting above-mentioned structure for when vacuum negative pressure equipment works and absorbs the inside air of through-hole 110 and suction hood 200, the outside air can pass above-mentioned a plurality of first gas holes 210 fast and get into to through-hole 110 and suction hood 200 inside, and the air is in the above-mentioned a plurality of first gas holes 210 in-process of passing, and the air can take away welding slag and the dust of attaching to suction hood 200 inner wall, further prevents welding slag and dust and adheres to the accumulation at suction hood 200's inner wall, reaches the effect that reduces the welding slag and drop in welding work piece and stop laser and produce the welding defect.

Referring to fig. 2 and 3, in order to make the dust hood 200 better absorb welding slag and dust, in some embodiments of the present utility model, the dust hood 200 is a funnel-shaped hood member with a rectangular cross section, a notch groove 220 is formed around one end of the dust hood 200 away from the through hole 110, the notch groove 220 is communicated with the inside of the dust hood 200, the notch groove 220 is a groove structure with a smaller height, and the groove depth is preferably 1.5mm to 3.5mm. . In use, the end of the dust hood 200 with the notch 220 is placed against the workpiece and the workpiece to be welded is housed therein. When the vacuum negative pressure equipment is vacuumized, the notch grooves 220 form an air flow channel, so that the outside air can quickly flow into the dust hood 200 from the four notch grooves 220, and at the moment, the air can synchronously take away welding slag and dust on the surface of the workpiece, so that the function of cleaning the workpiece is achieved. It should be noted that the number of the notch grooves 220 formed in the dust hood 200 may be one, two, three or more, but is not limited to four, and may be specifically determined according to practical needs.

Further, in order to facilitate the production of the laser welding protective cover, in some embodiments of the present utility model, the dust hood 200 and the protective cover body 100 are integrally formed, and in particular, the dust hood 200 and the protective cover body 100 may be integrally cast or the dust hood 200 may be welded to the protective cover body 100. By the structure, the production cost of the laser welding protective cover can be reduced.

It should be noted that, in some embodiments of the present utility model, the dust hood 200 and the protecting cover main body 100 may be configured as a split structure, and at this time, the dust hood 200 and the protecting cover main body 100 may be detachably connected, specifically, the dust hood 200 may be locked to the protecting cover main body 100 by a bolt, or the dust hood 200 may be mounted to the protecting cover main body 100 by a fastening structure, which may be specific according to practical needs. By adopting the above structure, the dust hood 200 and the protective cover main body 100 can be produced separately and then assembled, and when the dust hood 200 or the protective cover main body 100 is damaged, the dust hood and the protective cover main body can be replaced separately, thereby reducing maintenance cost.

Referring to fig. 1 to 3, in order to make the laser welding protective cover better applicable to welding workpieces, in some embodiments of the present utility model, the protective cover body 100 has two through holes 110 isolated from or communicating with each other, and one end opening of each through hole 110 is covered with a dust hood 200. Through adopting above-mentioned structure for one of them dust hood 200 of laser welding visor of this embodiment can be applied to the anodal of welding the work piece, and another dust hood 200 can be applied to the negative pole of welding the work piece, and it is more convenient to use, helps improving welding efficiency.

Referring to fig. 1 to 3, a laser welding apparatus for a lithium battery according to a second aspect of the present utility model includes a laser welding apparatus body and the above-mentioned laser welding protection cover, wherein the laser welding protection cover is movably mounted on the laser welding apparatus body, and specifically, a cylinder or a motor for driving the laser welding protection cover to move is disposed on the laser welding apparatus body. When the laser welding protective cover is used, the cylinder or the motor can drive the laser welding protective cover to lift so as to conveniently place a workpiece to be welded on the laser welding equipment body, and then the cylinder or the motor drives the laser welding protective cover to compress and cover the workpiece so as to conveniently weld the workpiece by the follow-up laser welding equipment body.

The lithium battery laser welding equipment of the embodiment can better absorb welding slag in the process of welding workpieces by adopting the laser welding protective cover, reduce the accumulation of welding slag on the laser welding protective cover to block laser, reduce the probability of accidental falling of welding slag on the workpieces, and improve the yield of welded products.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The present embodiment has been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiment, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit.

Claims

1. Laser welding visor is applied to lithium cell laser welding equipment, its characterized in that includes:

a protective cover main body (100) provided with at least one through hole (110) penetrating through the protective cover main body (100), wherein at least one air suction port (120) is formed in the side wall of the through hole (110);

at least one dust hood (200) is connected with one end of the through hole (110) in an opening way, the dust hood (200) is hollow and communicated with the through hole (110), and one end of the dust hood (200) far away from the through hole (110) is open;

wherein, each through hole (110) is far away from the one end opening sealing of the dust hood (200) and is provided with a light transmission piece.

2. The laser welding protective cover according to claim 1, wherein a placement position (111) is arranged on an inner wall of one end of the through hole (110) far away from the dust hood (200), and the light-transmitting member is embedded in the through hole (110) and is abutted to the placement position (111).

3. The laser welded protective cover according to claim 1 or 2, wherein the light-transmitting member is a transparent glass member.

4. The laser welding protective cover according to claim 1, wherein a plurality of first air passing holes (210) are formed in a sidewall of the dust hood (200) at intervals.

5. The laser welding protective cover according to claim 4, wherein the dust hood (200) is funnel-shaped or straight cylindrical, and the plurality of first air passing holes (210) are uniformly arranged at intervals on the side wall of the dust hood (200).

6. The laser welding protective cover according to claim 1, 4 or 5, wherein at least one notch groove (220) is formed in an end of the dust hood (200) away from the through hole (110), and the notch groove (220) is communicated with the inside of the dust hood (200).

7. The laser welding protective cover according to claim 1, wherein the protective cover body (100) has two through holes (110) isolated or communicating with each other, and one end opening of each through hole (110) is covered with the dust hood (200).

8. The laser welding protective cover according to claim 1 or 2 or 4 or 5 or 7, characterized in that the dust hood (200) is of unitary construction with the protective cover body (100).

9. The laser welding protective cover according to claim 1 or 2 or 4 or 5 or 7, characterized in that the dust hood (200) is detachably connected with the protective cover body (100).

10. Lithium battery laser welding equipment, characterized by comprising a laser welding equipment body and the laser welding protective cover according to any one of claims 1 to 9, wherein the laser welding protective cover is movably mounted on the laser welding equipment body.