Tab welding and pressing mechanism and welding device

Abstract

The utility model relates to the technical field of tab welding, and provides a tab welding pressing mechanism and a welding device. The electrode lug welding and pressing mechanism comprises a base, a pressing cutter and at least one elastic piece, a cavity penetrating through the two opposite sides of the base is formed in the base, the pressing cutter is slidably connected into the cavity and used for pressing an electrode lug, one end of the pressing cutter extends out of the cavity, the pressing cutter is provided with a first laser hole, and the elastic piece is a metal piece and contained in the cavity. One end of the elastic piece elastically abuts against the base, the other end of the elastic piece elastically abuts against the pressing knife, and the laser sequentially penetrates through the cavity and the first laser hole and acts on the tab. Compared with the prior art, the elastic piece made of metal is adopted to replace a rubber piece, the elastic piece made of metal is difficult to influence by high temperature generated by laser, so that the performance of the tab welding and pressing mechanism is stable and reliable in the using process, the risk of poor batch welding of tabs is greatly reduced, and the reliability of the tab welding and pressing mechanism is improved. And the yield of tab welding can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tab welding, in particular to a tab welding pressing mechanism and a welding device. Background Art

[0002] During the battery production process, tab welding operations are required to weld the tabs and metal parts (such as connecting pieces, shells, etc.) together. In the tab welding process, a clamping mechanism is required to clamp the tabs. At present, the clamping mechanism includes two layers of steel and a layer of rubber block, wherein the rubber block is located between the two layers of steel, and the rubber block and the steel are bonded together by glue, and both the steel and the rubber block are provided with laser holes. When the clamping mechanism clamps the tabs, the laser acts on the tabs through the laser holes. However, during the welding process of the existing clamping mechanism, the rubber block will be burned and aged by the high temperature generated by the laser, causing the steel and rubber parts to separate and fall off, thereby resulting in poor batch welding of the tabs. Utility Model Content

[0003] The purpose of the utility model is to provide a tab welding clamping mechanism and a welding device, aiming to solve the technical problem that the existing clamping mechanism is easily damaged, resulting in a high defective rate of tab welding.

[0004] In the first aspect, the present application provides a tab welding clamping mechanism, comprising a base, a pressing knife and at least one elastic member, wherein the base is provided with a cavity running through opposite sides of the base, the pressing knife is slidably connected in the cavity and is used to clamp the tab, one end of the pressing knife extends out of the cavity, the pressing knife is provided with a first laser hole, the elastic member is a metal member and is accommodated in the cavity, one end of the elastic member is elastically abutted against the base, and the other end of the elastic member is elastically abutted against the pressing knife, wherein the laser passes through the cavity and the first laser hole in sequence and acts on the tab.

[0005] The beneficial effects of the tab welding and clamping mechanism provided by the present invention are as follows: when the tab welding and clamping mechanism is used, and when the pressing cutter contacts the tab, as the base continuously approaches the tab, the pressing cutter gradually extends into the cavity under the action of the tab, and compresses the elastic member to fix the tab. After the pressing cutter presses the tab, the laser enters the first laser hole of the pressing cutter through the cavity opened on the base, and finally is emitted from the first laser hole and acts on the tab, thereby achieving welding of the tab and the metal part. After the welding operation is completed, the base gradually moves away from the tab, and the pressing cutter is reset under the action of the elastic member. Compared with the prior art, the present application uses an elastic member made of metal instead of a rubber member, and the high temperature generated by the laser is difficult to affect the above-mentioned elastic member made of metal, so that the performance of the tab welding and clamping mechanism is stable and reliable during use, which greatly reduces the risk of poor batch welding of the tabs and is conducive to improving the yield rate of the tab welding.

[0006] Optionally, the base includes a main body and a connecting block detachably connected to the main body, the main body is provided with an installation cavity passing through the main body, the pressing knife is accommodated in the installation cavity, the connecting block is provided with a second laser hole for the laser to pass through, the installation cavity and the second laser hole together constitute a cavity, and the elastic member is elastically abutted against the connecting block.

[0007] Optionally, one end of the pressing knife near the connecting block is raised to form a protrusion, and one end of the mounting cavity near the connecting block is recessed to form a recess for accommodating the protrusion, and the recess has an abutment surface for limiting abutment with the protrusion.

[0008] Optionally, at least one first receiving groove for receiving the elastic member is formed on a surface of the pressing knife close to the connecting block, and the elastic member elastically abuts against a wall surface of the first receiving groove.

[0009] Optionally, at least one second accommodating groove for accommodating the elastic member is formed on a surface of the connecting block close to the pressing knife, and the elastic member elastically abuts against a wall surface of the second accommodating groove.

[0010] Optionally, the pressing tool is further provided with a through groove connected to the first laser hole, and the main body is provided with a dust removal channel, one end of the dust removal channel passes through the surface of the main body, and the other end of the dust removal channel passes through the installation cavity and is connected to the through groove.

[0011] Optionally, the main body further includes a fastener, the connecting block is provided with a through hole penetrating the connecting block, the main body is provided with a threaded hole, and the fastener passes through the through hole and is threadedly connected to the threaded hole.

[0012] Optionally, the cross-sectional area of ​​the first laser hole gradually increases along the direction in which the pressing knife approaches the connecting block.

[0013] Optionally, the elastic member is a spring.

[0014] Optionally, the elastic member is made of copper.

[0015] In a second aspect, the present application provides a welding device comprising the above-mentioned tab welding clamping mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 A cross-sectional view of a tab welding and clamping mechanism provided in an embodiment of the present utility model;

[0018] Figure 2 for Figure 1A magnified view of middle A;

[0019] Figure 3 An exploded view of the tab welding and clamping mechanism provided in an embodiment of the present utility model;

[0020] Figure 4 A cross-sectional view of a main body provided in an embodiment of the present utility model;

[0021] Figure 5 for Figure 4 Enlarged view of middle B;

[0022] Figure 6 This is a structural diagram of the connection block provided in an embodiment of the utility model.

[0023] Among them, the reference numerals in the figures are:

[0024] 100. Tab welding and clamping mechanism; 10. Base; 20. Pressing knife;

[0025] 30. Elastic member; 11. Cavity; 12. Main body;

[0026] 13. Connecting block; 14. Fastener; 121. Mounting cavity;

[0027] 122. Dust removal channel; 123. Threaded hole; 131. Second laser hole;

[0028] 132. Second receiving groove; 133. Through hole; 1211. Recessed portion;

[0029] 1212. Abutment surface; 21. First laser hole; 22. Raised portion; 23. First receiving groove; 24. Through groove. DETAILED DESCRIPTION

[0030] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment" or "in some embodiments" appear in various places throughout this specification, not all references are to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0032] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 on the present invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0034] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0035] Please refer to Figures 1 to 6 Now, the tab welding and clamping mechanism 100 and the welding device in the embodiment of the present invention are described.

[0036] Please refer to Figures 1 to 3 The present application provides a tab welding and clamping mechanism 100 including a base 10, a pressing knife 20 and at least one elastic member 30. The base 10 is provided with a cavity 11 running through opposite sides of the base 10. The pressing knife 20 is slidably connected in the cavity 11 for clamping the tab. One end of the pressing knife 20 extends out of the cavity 11. The pressing knife 20 is provided with a first laser hole 21. The elastic member 30 is a metal member and is accommodated in the cavity 11. One end of the elastic member 30 is elastically abutted against the base 10, and the other end of the elastic member 30 is elastically abutted against the pressing knife 20. The laser passes through the cavity 11 and the first laser hole 21 in sequence and acts on the tab.

[0037] The present tab welding clamping mechanism 100 is used, and when the pressing knife 20 contacts the tab, as the base 10 continuously approaches the tab, the pressing knife 20 gradually extends into the cavity 11 under the action of the tab, and compresses the elastic member 30 to fix the tab. After the pressing knife 20 presses the tab, the laser enters the first laser hole 21 of the pressing knife 20 through the cavity 11 opened on the base 10, and finally is emitted from the first laser hole 21 and acts on the tab, thus achieving welding of the tab and the metal part. After the welding operation is completed, the base 10 gradually moves away from the tab, and the pressing knife 20 is reset under the action of the elastic member 30. Compared with the prior art, the present application uses an elastic member 30 made of metal instead of a rubber part, and the high temperature generated by the laser is unlikely to affect the above-mentioned elastic member 30 made of metal, so that the performance of the present tab welding clamping mechanism 100 is stable and reliable during use, greatly reducing the risk of poor batch welding, which is conducive to improving the yield rate of tab welding.

[0038] In another embodiment of this application, please refer to Figure 2 and Figure 3 The base 10 includes a main body 12 and a connecting block 13 detachably connected to the main body 12. The main body 12 is provided with a mounting cavity 121 that passes through the main body 12. The pressing knife 20 is accommodated in the mounting cavity 121. The connecting block 13 is provided with a second laser hole 131 for laser passing through. The mounting cavity 121 and the second laser hole 131 together constitute the cavity 11. The elastic member 30 elastically abuts against the connecting block 13.

[0039] Specifically, please refer to Figure 2 and Figure 3 The connecting block 13 is detachably connected to one side of the main body 12 in the first direction. A second laser hole 131 is provided on the surface of the connecting block 13 away from the main body 12. The second laser hole 131 extends along the first direction and passes through the surface of the connecting block 13 close to the main body 12. A mounting cavity 121 is provided on the surface of the main body 12 close to the connecting block 13. The mounting cavity 121 passes along the first direction to the surface of the main body 12 away from the connecting block 13. The second laser hole 131 is connected to the mounting cavity 121. When welding the tab, the laser enters the second laser hole 131, the mounting cavity 121 and the first laser hole 21 in sequence, and finally is emitted from the first laser hole 21 and acts on the tab. During assembly, the pressing tool 20 is first placed in the mounting cavity 121, and then the elastic member 30 is placed in the mounting cavity 121. Finally, the connecting block 13 is connected to the main body 12. In this embodiment, the connecting block 13 is detachably connected to the main body 12. With such an arrangement, when the service life of the pressing knife 20 reaches an upper limit, that is, the pressing knife 20 can no longer be used, the connecting block 13 can be removed from the main body 12, and then the pressing knife 20 can be replaced alone, without replacing the entire tab welding clamping mechanism 100, thereby greatly reducing the cost of use.

[0040] It is understandable that the shape of the first laser hole 21 can be square, circular, elliptical or other irregular shapes, as long as it can allow laser light to pass through, and is not limited here.

[0041] Likewise, the shape of the mounting cavity 121 may be square, circular, oval or other irregular shapes, etc., as long as the pressing blade 20 can slide in the mounting cavity 121 , and is not limited here.

[0042] In another embodiment of this application, please refer to Figure 4 and Figure 5 The end of the pressing blade 20 near the connecting block 13 is raised to form a raised portion 22, and the end of the mounting cavity 121 near the connecting block 13 is recessed to form a recessed portion 1211 for accommodating the raised portion 22. The recessed portion 1211 has an abutting surface 1212 for limiting abutment with the raised portion 22. The presence of the recessed portion 1211 forms a stepped surface between the end of the mounting cavity 121 away from the connecting block 13 and the recessed portion 1211. The stepped surface is the abutting surface 1212, which is used to abut against the raised portion 22 of the pressing blade 20, ensuring that the pressing blade 20 always slides within the mounting cavity 121 and preventing the pressing blade 20 from falling out of the mounting cavity 121, thereby greatly improving practicality.

[0043] In another embodiment of this application, please refer to Figure 3 At least one first receiving groove 23 for accommodating the elastic member 30 is formed on the surface of the pressing blade 20 near the connecting block 13. The elastic member 30 elastically abuts against the wall of the first receiving groove 23. This configuration can reduce the volume of the mounting cavity 121, thereby reducing the overall volume of the tab welding and clamping mechanism 100.

[0044] Furthermore, the outer peripheral surface of the elastic member 30 contacts the wall surface of the first receiving groove 23. This arrangement can reduce the degree of bending of the elastic member 30 when pressed, thereby improving the movement accuracy of the pressing blade 20, and further improving the pressing quality of the pressing blade 20 on the tab, which is conducive to improving the welding quality of the tab.

[0045] In another embodiment of this application, please refer to Figure 6 The surface of the connecting block 13 near the pressing blade 20 is provided with at least one second receiving groove 132 for accommodating the elastic member 30. The elastic member 30 elastically abuts against the wall of the second receiving groove 132. This configuration can reduce the volume of the mounting cavity 121, thereby reducing the overall volume of the tab welding and clamping mechanism 100.

[0046] Furthermore, the outer peripheral surface of the elastic member 30 contacts the wall surface of the second receiving groove 132. This arrangement can reduce the degree of bending of the elastic member 30 when pressed, thereby improving the movement accuracy of the pressing blade 20, and further improving the pressing quality of the pressing blade 20 on the tab, which is conducive to improving the welding quality of the tab.

[0047] It is understood that the number of elastic members 30, the number of first receiving grooves 23, and the number of second receiving grooves 132 can be one, two, or more. Among the elastic members 30, the first receiving grooves 23, and the second receiving grooves 132, the number of two of them can be the same, the number of all three can be the same, or the number of all three can be different, and this is not limited here. In this embodiment, the number of elastic members 30, the number of first receiving grooves 23, and the number of second receiving grooves 132 are all two, wherein the two first receiving grooves 23 are respectively located at opposite ends of the pressing blade 20, and the two second receiving grooves 132 are respectively located at opposite ends of the connecting block 13, and the two first receiving grooves 23 and the two second receiving grooves 132 correspond one to one.

[0048] In another embodiment of this application, please refer to Figure 2 and Figure 3 The press blade 20 further defines a through slot 24 that communicates with the first laser hole 21. The main body 12 defines a dust removal passage 122. One end of the dust removal passage 122 extends through the surface of the main body 12, and the other end of the dust removal passage 122 extends through the mounting cavity 121 and communicates with the through slot 24. This arrangement allows metal dust and welding exhaust gases generated during welding to be discharged through the through slot 24 and the dust removal passage 122.

[0049] It is understandable that the end of the dust removal passage 122 away from the pressing blade 20 can be connected to a vacuum pump, and the vacuum pump can form a negative pressure in the dust removal passage 122. The vacuum pump is a prior art and is very common, so it will not be described in detail here.

[0050] In another embodiment of this application, please refer to Figure 3 The main body 12 further includes a fastener 14. The connecting block 13 defines a through hole 133 extending therethrough. The main body 12 defines a threaded hole 123. The fastener 14 penetrates the through hole 133 and is threadedly connected to the threaded hole 123. Specifically, the surface of the connecting block 13 facing away from the main body 12 defines a through hole 133. The through hole 133 extends along a first direction through the surface of the connecting block 13 facing the main body 12. The surface of the main body 12 facing the connecting block 13 defines a threaded hole 123. The use of the fastener 14 in a locking manner to achieve a detachable connection between the connecting block 13 and the main body 12 can improve the connection strength between the connecting block 13 and the main body 12.

[0051] It is understandable that the fastener 14 can be a screw or a bolt, etc., which is not limited here.

[0052] In another embodiment of this application, please refer to Figure 2As the press blade 20 approaches the connection block 13, the cross-sectional area of ​​the first laser aperture 21 gradually increases. Specifically, in this embodiment, the cross-sectional area of ​​the first laser aperture 21 is circular. As the press blade 20 approaches the connection block 13, the diameter of the first laser aperture 21 increases, resulting in a bell-shaped first laser aperture 21. Laser welding requires a certain deflection angle, and the bell-shaped first laser aperture 21 accommodates this angle.

[0053] In another embodiment of the present application, the elastic member 30 is a spring.

[0054] In another embodiment of the present application, the elastic member 30 is made of copper. Considering the need to use alcohol to clean the tab welding and clamping mechanism 100, copper is preferably used as the material for the elastic member 30. This further improves the reliability of the tab welding and clamping mechanism 100 during use and further reduces the risk of poor tab welding in batches.

[0055] In the tab welding and clamping mechanism 100 provided in this application, the contact surface between the pressing blade 20 and the tab can be adjusted by a spring to ensure the level of contact between the pressing blade 20 and the tab, thereby improving the pressing quality of the pressing blade 20 on the tab and, in turn, improving the quality of the tab welding. In addition, the use of the abutment surface 1212 and the fastening of the connecting block 13 to the main body 12 via the fastener 14 can prevent parts from falling off during use of the tab welding and clamping mechanism 100.

[0056] The present application also provides a welding device, which includes the above-mentioned tab welding clamping mechanism 100.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A tab welding clamping mechanism, characterized in that: include: A base (10) is provided with a cavity (11) extending through two opposite sides of the base (10); A pressing knife (20) is slidably connected to the cavity (11) and is used for pressing the tab. One end of the pressing knife (20) extends out of the cavity (11). The pressing knife (20) is provided with a first laser hole (21). At least one elastic member (30), the elastic member (30) being a metal member and being accommodated in the cavity (11), one end of the elastic member (30) elastically abutting against the base (10), and the other end of the elastic member (30) elastically abutting against the pressing blade (20); The laser passes through the cavity (11) and the first laser hole (21) in sequence and acts on the tab.

2. The tab welding clamping mechanism according to claim 1, characterized in that: The base (10) includes a main body (12) and a connecting block (13) detachably connected to the main body (12); the main body (12) is provided with a mounting cavity (121) penetrating the main body (12); the pressing knife (20) is accommodated in the mounting cavity (121); the connecting block (13) is provided with a second laser hole (131) for allowing laser to pass through; the mounting cavity (121) and the second laser hole (131) together constitute the cavity (11); and the elastic member (30) elastically abuts against the connecting block (13).

3. The tab welding clamping mechanism according to claim 2, characterized in that: One end of the pressing knife (20) close to the connecting block (13) is raised to form a raised portion (22), and one end of the mounting cavity (121) close to the connecting block (13) is recessed to form a recessed portion (1211) for accommodating the raised portion (22), and the recessed portion (1211) has an abutting surface (1212) for limiting abutment with the raised portion (22).

4. The tab welding clamping mechanism according to claim 2, characterized in that: At least one first receiving groove (23) for receiving the elastic member (30) is provided on the surface of the pressing knife (20) close to the connecting block (13), and the elastic member (30) elastically abuts against the wall of the first receiving groove (23).

5. The tab welding and clamping mechanism according to claim 2, characterized in that: The surface of the connecting block (13) close to the pressing knife (20) is provided with at least one second receiving groove (132) for receiving the elastic member (30), and the elastic member (30) elastically abuts against the wall of the second receiving groove (132).

6. The tab welding clamping mechanism according to claim 2, characterized in that: The pressing knife (20) is further provided with a through groove (24) connected to the first laser hole (21); the main body (12) is provided with a dust removal channel (122); one end of the dust removal channel (122) passes through the surface of the main body (12); the other end of the dust removal channel (122) passes through the installation cavity (121) and is connected to the through groove (24).

7. The tab welding and clamping mechanism according to claim 2, characterized in that: The main body (12) further includes a fastener (14); the connecting block (13) is provided with a through hole (133) penetrating the connecting block (13); the main body (12) is provided with a threaded hole (123); the fastener (14) passes through the through hole (133) and is threadedly connected to the threaded hole (123).

8. The tab welding and clamping mechanism according to claim 2, characterized in that: Along the direction in which the pressing knife (20) approaches the connecting block (13), the cross-sectional area of ​​the first laser hole (21) gradually increases.

9. The tab welding clamping mechanism according to any one of claims 1 to 8, characterized in that: The elastic member (30) is a spring; and / or, The elastic member (30) is made of copper.

10. A welding device, characterized in that: It comprises the tab welding clamping mechanism (100) as claimed in any one of claims 1 to 9.

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