CN221019106U - Ultrasonic welding head and welding equipment - Google Patents
Ultrasonic welding head and welding equipment Download PDFInfo
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- CN221019106U CN221019106U CN202322791095.0U CN202322791095U CN221019106U CN 221019106 U CN221019106 U CN 221019106U CN 202322791095 U CN202322791095 U CN 202322791095U CN 221019106 U CN221019106 U CN 221019106U
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- 238000003466 welding Methods 0.000 title claims abstract description 193
- 230000007704 transition Effects 0.000 claims abstract description 19
- 239000011159 matrix material Substances 0.000 claims description 4
- 239000011888 foil Substances 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 9
- 239000002184 metal Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of ultrasonic welding processing, and discloses an ultrasonic welding head and welding equipment. The ultrasonic welding head comprises a welding head body, wherein the welding head body is provided with an ultrasonic welding tooth surface, the ultrasonic welding tooth surface comprises a welding area, transition areas are arranged on two sides of the welding area along a first direction, and the first direction is the vibration direction of the welding head body; the welding area is uniformly provided with a plurality of first welding teeth, the transition area is uniformly provided with a plurality of second welding teeth, and the height of the second welding teeth is lower than that of the first welding teeth. When the ultrasonic welding head is used for welding the multi-layer tab foil, the problem that batteries are scrapped due to frequent welding cracks in the welding process of the multi-layer tab foil is solved, the reject ratio and the rejection rate of the batteries are reduced, the welding surface is guaranteed to be free from breakage and cracks, and the welding quality is improved so as to meet the actual production quality requirement.
Description
Technical Field
The utility model relates to the technical field of ultrasonic welding processing, in particular to an ultrasonic welding head and welding equipment.
Background
Secondary batteries, also called rechargeable batteries or secondary batteries, are batteries that can be used continuously by activating active materials by charging after the battery is discharged. The battery core is used as a core component of the secondary battery and is manufactured by a positive pole piece, a diaphragm and a negative pole piece through a winding or lamination process, and in the assembly process of the secondary battery, a plurality of layers of tab foils on the positive pole piece or the negative pole piece are reliably connected with the adapter piece through welding to conduct current.
In the prior art, a multi-layer tab foil on a positive plate and a negative plate is welded with a transfer plate by adopting an ultrasonic welding technology, the working principle of ultrasonic welding is that an energy transducer is utilized to convert electric energy into high-frequency mechanical vibration energy, under the condition of pressurization, two metal plates (tab foil and transfer plate) to be welded are clamped between a welding head and a base, high-frequency vibration waves are transmitted to the surface of an upper metal plate (tab foil) along the welding head, the welding head drives the upper metal plate to vibrate at high frequency, the base fixes a lower metal plate (transfer plate or tab foil), so that high-frequency friction is generated between the two metal plates, and molecules at the joint of the metal plates are mutually penetrated and combined together to form tight connection.
However, in the prior art, the ultrasonic welding method has the following problems that in the ultrasonic welding process, the tab foil on the surface layer is very thin (about 4-15 μm), so that the tab foil on the outermost layer along the high-frequency vibration direction of the welding head is easily broken or cracked, metal scraps can be generated, and the quality of the battery is affected.
Based on this, there is a need for an ultrasonic horn and a welding apparatus that solve the above-mentioned problems.
Disclosure of utility model
Based on the above, the utility model aims to provide an ultrasonic welding head and welding equipment, which solve the problem of battery scrapping caused by frequent welding crack in the welding process of multi-layer tab foil, reduce the reject ratio and the rejection rate of the battery, ensure that the welding surface is free from breakage and crack, and improve the welding quality so as to meet the actual production quality requirement.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
In one aspect, an ultrasonic welding head is provided, including a welding head body, the welding head body is provided with an ultrasonic welding tooth surface, the ultrasonic welding tooth surface includes a welding area, two sides of the welding area along a first direction are provided with transition areas, and the first direction is a vibration direction of the welding head body;
The welding area is uniformly provided with a plurality of first welding teeth, the transition area is uniformly provided with a plurality of second welding teeth, and the height of the second welding teeth is lower than that of the first welding teeth.
As a preferable technical scheme of the ultrasonic welding head, the shape of the first welding tooth is a spherical surface.
As a preferred technical solution of the ultrasonic welding head, the welding area is provided with the transition area along two sides of the second direction, and the first direction is perpendicular to the second direction.
As a preferred technical solution of the ultrasonic welding head, the height of the second welding tooth is half of the height of the first welding tooth.
As a preferable technical scheme of the ultrasonic welding head, the second welding teeth are ellipsoids.
As a preferred embodiment of the ultrasonic horn, the ellipsoid extends along the second direction.
As a preferable technical scheme of the ultrasonic welding head, a round angle is arranged on the circumferential direction of the ultrasonic welding tooth surface.
As a preferable technical scheme of the ultrasonic welding head, a plurality of the first welding teeth are arranged in a matrix.
As a preferred technical solution of the ultrasonic welding head, the height of the first welding tooth ranges from 0.2mm to 0.5mm.
In another aspect, a welding device is provided, including an ultrasonic base and the ultrasonic welding head according to any of the above schemes, an ultrasonic welding tooth surface of the ultrasonic welding head is located above the ultrasonic base, and the ultrasonic welding tooth surface and the ultrasonic base are used for welding a workpiece to be welded.
The beneficial effects of the utility model are as follows:
the utility model provides an ultrasonic welding head and welding equipment, when a welding head body vibrates along a first direction and a workpiece to be welded is welded, as the height of a second welding tooth of a transition area is lower than that of a first welding tooth, the impact force of the workpiece to be welded can be reduced, the transition effect is further realized, the transmission of peripheral energy can be effectively reduced by shallower second welding teeth, and the damage of the workpiece to be welded at the periphery of the welding area is prevented. When the ultrasonic welding head is used for welding the multi-layer tab foil, the problem that batteries are scrapped due to frequent welding cracks in the welding process of the multi-layer tab foil is solved, the reject ratio and the rejection rate of the batteries are reduced, the welding surface is guaranteed to be free from breakage and cracks, and the welding quality is improved so as to meet the actual production quality requirement.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.
FIG. 1 is a front view of an ultrasonic horn provided in accordance with an embodiment of the present utility model;
FIG. 2 is an enlarged view of a portion of an ultrasonic horn according to an embodiment of the present utility model;
FIG. 3 is a schematic view of an ultrasonic welding tooth surface according to an embodiment of the present utility model;
FIG. 4 is a side view of an ultrasonic horn provided in accordance with an embodiment of the present utility model;
Fig. 5 is a schematic structural view of a welding apparatus according to an embodiment of the present utility model.
The figures are labeled as follows:
10. A workpiece to be welded;
1. a welding head body; 11. ultrasonic welding tooth surfaces; 12. a first welding tooth; 13. a second welding tooth; 14. round corners;
2. And an ultrasonic base.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
In the prior art, the ultrasonic welding mode has the following problems that in the ultrasonic welding process, the tab foil on the surface layer is very thin, so that the tab foil on the outermost layer along the high-frequency vibration direction of the welding head is easily broken or cracked, metal scraps can be generated, and the quality of a battery is affected.
In order to solve the above-mentioned problems, as shown in fig. 1-4, the present embodiment provides an ultrasonic welding head, which includes a welding head body 1, the welding head body 1 is provided with an ultrasonic welding tooth surface 11, the ultrasonic welding tooth surface 11 includes a welding region, two sides of the welding region along a first direction are provided with transition regions, and the first direction is a vibration direction of the welding head body 1; the welding area is evenly provided with a plurality of first welding teeth 12, and the transition area is evenly provided with a plurality of second welding teeth 13, and the height of the second welding teeth 13 is lower than the height of the first welding teeth 12. In this embodiment, the workpiece 10 to be welded is a tab foil and a transfer sheet. In this embodiment, the first direction is the X direction. As shown in fig. 2, the first welding tooth 12 has a height a, the second welding tooth 13 has a height b, and the height a of the first welding tooth 12 is greater than the height b of the second welding tooth 13.
The height difference between the second welding tooth 13 and the first welding tooth 12 is not particularly limited in the embodiment of the present application, and in one possible implementation, the ratio of the height of the second welding tooth 13 to the height of the first welding tooth 12 is between 0.1 and 0.9, and preferably, the height of the second welding tooth 13 is between 1/4 and 3/4 of the height of the first welding tooth 12.
In other possible embodiments, the plurality of second welding teeth 13 may be the same height, or may be different heights, for example, the plurality of second welding teeth 13 may be disposed along a direction away from the first welding teeth 12, and the height of the second welding teeth 13 may be gradually reduced, which is only illustrated by way of example and not limitation.
When the welding head body 1 vibrates along the first direction and the workpiece 10 to be welded is welded, the impact force of the workpiece 10 to be welded can be reduced due to the fact that the height of the second welding teeth 13 in the transition area is lower than that of the first welding teeth 12, the transition effect is achieved, the transmission of peripheral energy can be effectively reduced through the shallower second welding teeth 13, and the workpiece 10 to be welded around the welding area is prevented from being damaged. When the ultrasonic welding head is used for welding the multi-layer tab foil, the problem that batteries are scrapped due to frequent welding cracks in the welding process of the multi-layer tab foil is solved, the reject ratio and the rejection rate of the batteries are reduced, the welding surface is guaranteed to be free from breakage and cracks, and the welding quality is improved so as to meet the actual production quality requirement.
In this embodiment, as shown in fig. 2-4, the first welding teeth 12 are spherical in shape, which ensures the capability of penetrating into the workpiece 10 to be welded, and because the top is spherical, the surface welding is not easy to be damaged. Furthermore, the plurality of first welding teeth 12 ensure that the welding area pressure and amplitude are uniform and stable, and the single first welding teeth 12 cannot be damaged due to partial abrasion.
In this embodiment, two sets of ultrasonic welding tooth surfaces 11 are symmetrically disposed on the welding head body 1.
In this embodiment, the welding area is rectangular, and the transition area is located at the short side of the welding area.
Preferably, the welding area is provided with transition areas on both sides in the second direction, the first direction being perpendicular to the second direction. The transition area is also arranged at the long side of the welding area, and the transition areas are arranged around the welding area, so that welding cracks in the tab foil welding process are further prevented. In this embodiment, the second direction is the Y direction.
In this embodiment, the diameter of the first welding teeth 12 is in the range of 1mm-2mm, and the height of the first welding teeth 12 is in the range of 0.2mm-0.5mm, so as to adapt to workpieces 10 to be welded with different thicknesses.
Preferably, the plurality of first welding teeth 12 are arranged in a matrix, so that the processing is convenient, the stress uniformity of welding parts is ensured, and the welding quality is improved. In other embodiments, the plurality of first welding teeth 12 may be distributed irregularly, and the first welding teeth 12 mainly perform a function of transmitting high-frequency vibration during the ultrasonic welding process, so that the workpieces 10 to be welded are effectively fused.
In this embodiment, the second welding teeth 13 are ellipsoidal, so as to increase the contact area with the workpiece 10 to be welded, and prevent the first welding teeth 12 from slipping during the welding process. It is further preferable that the long sides of the ellipsoids extend in the second direction, the first direction is perpendicular to the second direction, the contact area with the workpiece 10 to be welded is increased as much as possible, and the effect of preventing the slippage of the workpiece to be welded with the strap is improved. In other embodiments, the second tooth 13 may also be spherical, the diameter of the second tooth 13 being half the diameter of the first tooth 12. In this embodiment, the shorter side of the ellipsoid is in the range of 0.5mm-1mm and the longer side is in the range of 0.8mm-1.3mm.
Preferably, the second teeth 13 are distributed in a matrix or other irregular distribution.
Preferably, the height of the second welding teeth 13 is half that of the first welding teeth 12, and the effect of preventing the workpiece 10 to be welded from cracking is remarkable.
Preferably, the ultrasonic welding tooth surface 11 is circumferentially provided with a fillet 14. The fillet 14 is used for the transition of the welding zone and the non-welding zone, so that the deformation is small, the welding surface is ensured to be free from breakage and cracks, and the welding quality is improved.
Further, as shown in fig. 5, the present embodiment also provides a welding apparatus, which includes the ultrasonic base 2 and the ultrasonic welding head described above, the ultrasonic welding tooth surface 11 of the ultrasonic welding head is located above the ultrasonic base 2, and the workpiece 10 to be welded is welded between the ultrasonic welding tooth surface 11 and the ultrasonic base 2.
Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.
Claims (10)
1. The ultrasonic welding head is characterized by comprising a welding head body (1), wherein the welding head body (1) is provided with an ultrasonic welding tooth surface (11), the ultrasonic welding tooth surface (11) comprises a welding area, transition areas are arranged on two sides of the welding area along a first direction, and the first direction is the vibration direction of the welding head body (1);
The welding area is uniformly provided with a plurality of first welding teeth (12), the transition area is uniformly provided with a plurality of second welding teeth (13), and the height of the second welding teeth (13) is lower than that of the first welding teeth (12).
2. The ultrasonic horn according to claim 1, characterized in that the first tooth (12) is spherical in shape.
3. The ultrasonic horn of claim 1, wherein the weld zone is provided with the transition zone on both sides in a second direction, the first direction being perpendicular to the second direction.
4. An ultrasonic horn according to claim 1, characterized in that the height of the second tooth (13) is half the height of the first tooth (12).
5. An ultrasonic horn according to claim 1, characterized in that the second tooth (13) is ellipsoidal.
6. The ultrasonic horn of claim 5 wherein the length of the ellipsoid extends in the second direction.
7. An ultrasonic horn according to claim 1, characterized in that the ultrasonic horn face (11) is provided with rounded corners (14) in the circumferential direction.
8. The ultrasonic horn according to any one of claims 1 to 7, characterized in that a plurality of said first teeth (12) are arranged in a matrix.
9. The ultrasonic horn according to any one of claims 1 to 7, characterized in that the height of the first tooth (12) ranges from 0.2mm to 0.5mm.
10. Welding apparatus, characterized in that it comprises an ultrasonic foot (2) and an ultrasonic horn according to any one of claims 1-9, the ultrasonic welding flank (11) of which is located above the ultrasonic foot (2), between the ultrasonic welding flank (11) and the ultrasonic foot (2) for welding a workpiece (10) to be welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322791095.0U CN221019106U (en) | 2023-10-17 | 2023-10-17 | Ultrasonic welding head and welding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322791095.0U CN221019106U (en) | 2023-10-17 | 2023-10-17 | Ultrasonic welding head and welding equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221019106U true CN221019106U (en) | 2024-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322791095.0U Active CN221019106U (en) | 2023-10-17 | 2023-10-17 | Ultrasonic welding head and welding equipment |
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|---|---|
| CN (1) | CN221019106U (en) |
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2023
- 2023-10-17 CN CN202322791095.0U patent/CN221019106U/en active Active
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