CN216541344U - Ultrasonic welding head with special-shaped teeth - Google Patents
Ultrasonic welding head with special-shaped teeth Download PDFInfo
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- CN216541344U CN216541344U CN202120891400.1U CN202120891400U CN216541344U CN 216541344 U CN216541344 U CN 216541344U CN 202120891400 U CN202120891400 U CN 202120891400U CN 216541344 U CN216541344 U CN 216541344U
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Abstract
The utility model discloses an ultrasonic welding head of a special-shaped tooth, which comprises a welding head main body and a standard round table; the welding head main body comprises a welding head front section and a welding head end section; the standard round platform, the tail section of the welding head and the front section of the welding head are sequentially and fixedly connected end to end; the welding surface of the front section of the welding head is provided with special-shaped teeth; the special-shaped teeth comprise a plurality of protruding welding teeth, the top of each protruding welding tooth is of a planar approximately hemispherical structure, and the circular outline of each protruding welding tooth can reduce the damage to the foil; and the tooth diameter and the tooth depth of the foremost row of convex welding teeth positioned at the front section of the welding head are smaller than those of the plurality of groups of back row convex welding teeth, the plurality of groups of back row convex welding teeth can ensure the welding strength, meanwhile, the welding mark formed by the foremost row convex welding teeth is shallower, and the damage degree to the foil is reduced.
Description
Technical Field
The utility model relates to the field of ultrasonic welding, in particular to an ultrasonic welding head with special-shaped teeth.
Background
Ultrasonic welding has the excellent characteristics of high welding strength, low resistivity, high efficiency, low energy consumption, no molten bead splashing and the like, so that the ultrasonic welding is increasingly applied to the lithium ion battery industry, and the quality requirement on an ultrasonic welding head is also increasingly high. Along with the continuous improvement of lithium ion battery energy density demand and the continuous reduction of electric core thickness, the thickness of mass flow body foil is also in continuous attenuate, and 6um foil is more and more used in lithium ion battery production process as the mass flow body at present. For example, patent CN208101083U discloses a die for ultrasonic welding with rhombic teeth, and in the ultrasonic welding process of 6um foil, because of the vertical downward acting force of the welding teeth of the ultrasonic welding head, the foil is stressed to form a welding mark which is concave downward, and no matter the rhombic teeth or the rhombic teeth, because of the great damage to the foil caused by the profile of the rhombic teeth at the edge, the joint between the welded area and the unwelded area is broken, and lithium embedding cannot be performed on the negative plate of the foil fracture layer or lithium ion embedding cannot be performed at the positive end in the formation process, so that the capacity of the battery cell is lost. Therefore, in order to meet the increasing demand and the development trend of increasing the energy density of the battery cell, a novel tooth-shaped welding head is researched for the increasingly thinned current collector foil, so that the project which needs to be completed at present is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of how to solve the problem of welding crack in the welding process of the high-energy-density and ultrathin current collector foil.
The utility model solves the technical problems through the following technical means:
an ultrasonic welding head with special-shaped teeth comprises a welding head main body and a standard round table; the welding head main body comprises a welding head front section and a welding head end section; the standard round table, the welding head tail section and the welding head front section are sequentially fixedly connected end to end; the front section of the welding head comprises a welding surface, and special-shaped teeth are arranged on the welding surface; the special-shaped teeth comprise a plurality of protruding welding teeth; a plurality of convex welding teeth are regularly arranged; the top of each protruding welding tooth is of a planar approximately hemispherical structure, and the tooth diameter and the tooth depth of the most front row of protruding welding teeth positioned at the front section of the welding head are smaller than those of the rear rows of the protruding welding teeth.
The foil welding device is provided with the plurality of regularly arranged protruding welding teeth, and the top of each protruding welding tooth is of a planar approximately hemispherical structure, so that compared with the existing helical teeth or rhombic teeth, the foil welding device has the advantages that the damage to foil materials can be reduced due to the round outline of the approximately hemispherical structure with the planar top; and the tooth diameter and the tooth depth of the foremost row of the protruding welding teeth positioned on the front section of the welding head are smaller than those of the plurality of groups of the protruding welding teeth positioned on the back section, the plurality of groups of the protruding welding teeth positioned on the back section can ensure the welding strength, meanwhile, the welding mark formed by the protruding welding teeth positioned on the foremost row is shallower, and the damage degree to the foil is reduced.
Preferably, each protruding welding tooth in the same row is arranged at equal intervals.
Preferably, the front and rear rows of raised weld teeth are spaced apart.
Preferably, a plurality of protruding welding teeth in the profile teeth are arranged in a rectangular array.
Preferably, the length and width dimensions of the rectangular array of shaped teeth are equal to or slightly less than the length and width of the side of the front section of the horn.
Preferably, the number of the protruding welding teeth is 90, and the number of the protruding welding teeth in each row is 30.
Preferably, the front section of the welding head is of a cuboid and trapezoid structure which are connected together.
Preferably, the end of the welding head is of a cylindrical structure.
The utility model has the advantages that:
1. the foil welding device is provided with the plurality of regularly arranged protruding welding teeth, and the top of each protruding welding tooth is of a planar approximately hemispherical structure, so that compared with the existing helical teeth or rhombic teeth, the foil welding device has the advantages that the damage to foil materials can be reduced due to the round outline of the approximately hemispherical structure with the planar top; and the tooth diameter and the tooth depth of the foremost row of the protruding welding teeth positioned on the front section of the welding head are smaller than those of the plurality of groups of the protruding welding teeth positioned on the back section, the plurality of groups of the protruding welding teeth positioned on the back section can ensure the welding strength, meanwhile, the welding mark formed by the protruding welding teeth positioned on the foremost row is shallower, and the damage degree to the foil is reduced.
2. A plurality of protruding welding teeth in the dysmorphism tooth are equidistant and arrange, but the homodisperse vibration power avoids foil local atress inhomogeneous and impaired.
3. The special-shaped teeth approximately cover the side face of the front section of the whole welding head, the vibration force is dispersed in a large area as much as possible, the local stress of the foil is reduced to the maximum extent, and the integrity of the foil is ensured.
4. The ultrasonic welding head designed by the utility model effectively solves the problem of foil welding crack in the process of welding the cell lug of the high-energy-density and ultrathin current collector foil, and ensures the welding quality of the cell.
Drawings
FIG. 1 is a schematic structural view of an ultrasonic horn of a shaped tooth according to the present invention;
FIG. 2 is a side view schematic of a weld head body according to an embodiment of the present invention;
fig. 3 is an enlarged schematic structural diagram of a in the embodiment of the present invention.
The reference numbers illustrate:
1. a weld head body; 11. a front section of the welding head; 12. a welding head end section; 2. a standard circular table; 3. and (5) protruding and welding teeth.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, the present embodiment discloses an ultrasonic horn with shaped teeth, which includes a horn body 1 and a standard circular truncated cone 2.
The horn body 1 of the present embodiment includes a horn front section 11 and a horn end section 12;
specifically, with the orientation of fig. 1 as a reference, the front welding head section 11 includes a cuboid and a trapezoidal structure which are connected together and can also be integrally formed, and the rear welding head section 12 is a cylindrical structure; the left end of the cuboid is welded and fixed with the right end of the trapezoid body, and the cuboid can also be integrally formed, wherein the thickness of the trapezoid body is 14.2mm, and the length of the trapezoid body is 14.3 mm; the length of the welding head end section 12 is 20.46mm, and the diameter is 47.7 mm;
as shown in fig. 1, and specifically with reference to the orientation of fig. 1, the right end of the end horn 12 is welded to the left end of the front horn segment 11, or may be integrally formed, and the junction between the right end of the end horn 12 and the left end of the front horn segment 11 is over-rounded, and the over-rounded junction is R19 mm.
As shown in fig. 1, the right end of the standard circular truncated cone 2 of the present embodiment is coaxially welded and fixed to the left end of the welding head end section 12, or may be integrally formed, the length of the standard circular truncated cone 2 is 44.1mm, the diameter of the standard circular truncated cone 2 is 50mm, and the total length of the standard circular truncated cone 2 and the welding head body 1 is 113.3 mm.
As shown in fig. 1 and 2, the front section of the welding head of the present embodiment has a welding surface, the welding surface is provided with special-shaped teeth, the special-shaped teeth include a plurality of protruding welding teeth 3, the plurality of protruding welding teeth 3 are divided into a plurality of groups and regularly arranged, each protruding welding tooth 3 located in the same row is arranged at equal intervals, the protruding welding teeth 3 in the front and rear rows are arranged at intervals, and the plurality of protruding welding teeth 3 are arranged in a rectangular array;
as shown in fig. 2 and 3, each protruding welding tooth 3 is of a structure with a plane top and an approximate hemisphere shape, and the bottom section of the protruding welding tooth 3 is welded and fixed with one side of the cuboid of the front section 11 of the welding head; the left-right distance between two adjacent protruding welding teeth 3 in the same row is 1.45mm, and the front-back distance between two adjacent protruding welding teeth 3 in the front-back row is 1.40 mm; as shown in fig. 2, the tooth diameter and tooth depth of the front-most row or the back-most row of the convex welding teeth 3 positioned at the front section 11 of the welding head are smaller than those of the other rows of the convex welding teeth 3; in the embodiment, the size of the front row of the protruding welding teeth 3 is small, and the size of the back row of the protruding welding teeth 3 is large.
The embodiment provides a specific size example, the size can meet the requirement that the contact area between the special-shaped teeth and the foil is large when the ultrasonic welding head is held by a hand for operation, and the specific size is as follows: the diameter of the top plane of the front row of the projection welding teeth 3 is phi 0.2, the diameter of the bottom is phi 0.7, and the tooth depth is 0.2 mm; the diameter of the top plane of a plurality of rows of protruding welding teeth 3 positioned at the rear end is phi 0.25, the diameter of the bottom is phi 0.8, the tooth depth is 0.25mm, and the arc of the tooth side surface is phi 0.3.
The working principle of the embodiment is as follows: the utility model provides an ultrasonic welding head with special-shaped teeth, which is provided with a plurality of groups of arranged protruding welding teeth 3, and the top of each protruding welding tooth 3 is of a planar approximately hemispherical structure, so that compared with the existing helical teeth or rhombic teeth, the circular profile of the approximately hemispherical structure with the planar top can reduce the damage to foil; and the tooth diameter and tooth depth of the foremost row of convex welding teeth 3 positioned at the front section of the welding head are smaller than the tooth diameter and tooth depth of the plurality of groups of convex welding teeth 3 positioned at the back section, the plurality of groups of convex welding teeth 3 positioned at the back section can ensure the welding strength, meanwhile, the welding seal formed by the foremost row of convex welding teeth 3 is shallower, and the damage degree to the foil is reduced, in the welding process, the plurality of groups of convex welding teeth 3 positioned at the back section press the foil firstly, at the moment, the foil is pressed to form a plurality of first welding seals which are sunken downwards and are similar to hemispheres, the joint of the welding seal and the non-welding area is subjected to a first tensile force stretching towards the first welding seal direction, then the foremost row of convex welding teeth start to contact and press the foil to form a second welding seal, when the foremost row of convex welding teeth just contacts the foil, at the moment, the first welding seal has completed a part of the whole depth, and the foil at the peripheral non-welding area moves to the first welding position after being subjected to the first tensile force, when the front row of protruding welding teeth are pressed downwards, the foil between the first welding mark and the second welding mark has enough stretching amount to meet the requirement of welding with the residual depth, so that the foil between the first welding mark and the second welding mark is prevented from being broken due to large tensile force. The different time contact foil of protruding welding tooth of variation in size can play excessive effect to the atress of foil, reduces the damage degree of welding and not welding regional foil.
The ultrasonic welding head designed by the utility model effectively solves the problem of foil welding crack in the process of welding the cell lug of the high-energy-density and ultrathin current collector foil, and ensures the welding quality of the cell.
Example two
The present embodiment differs from the above embodiments in that: the number of the protruding welding teeth 3 of this embodiment is 90, 90 protruding welding teeth 3 are evenly divided into three rows, and are arranged into three rows, each row is provided with 30 protruding welding teeth, and the tooth diameter and the tooth depth of the most front protruding welding teeth 3 are smaller than the tooth diameter and the tooth depth of the other two rows of protruding welding teeth 3, forming the special-shaped teeth.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides an ultrasonic bonding tool of dysmorphism tooth which characterized in that: the welding head comprises a welding head body and a standard round table; the welding head main body comprises a welding head front section and a welding head end section; the standard round table, the welding head tail section and the welding head front section are sequentially fixedly connected end to end; the front section of the welding head comprises a welding surface, and special-shaped teeth are arranged on the welding surface; the special-shaped teeth comprise a plurality of protruding welding teeth; a plurality of convex welding teeth are regularly arranged; the top of each protruding welding tooth is of a planar approximately hemispherical structure, and the tooth diameter and the tooth depth of the most front row of protruding welding teeth positioned at the front section of the welding head are smaller than those of the rear rows of the protruding welding teeth.
2. The shaped tooth ultrasonic horn of claim 1 wherein: each protruding welding tooth positioned in the same row is arranged at equal intervals.
3. The shaped tooth ultrasonic horn of claim 2 wherein: the front and back rows of convex welding teeth are arranged at intervals.
4. An ultrasonic horn for shaped teeth as defined in any one of claims 1 to 3 wherein: a plurality of protruding welding teeth in the special-shaped teeth are arranged in a rectangular array.
5. The shaped tooth ultrasonic horn of claim 4 wherein: the length and width of the special-shaped teeth in the rectangular array are equal to the length and width of the side face of the front section of the welding head.
6. The ultrasonic horn of claim 4 wherein: the number of the protruding welding teeth is 90, and the number of the protruding welding teeth in each row is 30.
7. The shaped tooth ultrasonic horn of claim 1 wherein: the front section of the welding head is of a cuboid and trapezoid structure which are connected together.
8. The shaped tooth ultrasonic horn of claim 7 wherein: the tail section of the welding head is of a cylindrical structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120891400.1U CN216541344U (en) | 2021-04-27 | 2021-04-27 | Ultrasonic welding head with special-shaped teeth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120891400.1U CN216541344U (en) | 2021-04-27 | 2021-04-27 | Ultrasonic welding head with special-shaped teeth |
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| CN216541344U true CN216541344U (en) | 2022-05-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024113482A1 (en) * | 2022-11-30 | 2024-06-06 | 宁德时代新能源科技股份有限公司 | Machining mechanism and ultrasonic welding device |
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- 2021-04-27 CN CN202120891400.1U patent/CN216541344U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024113482A1 (en) * | 2022-11-30 | 2024-06-06 | 宁德时代新能源科技股份有限公司 | Machining mechanism and ultrasonic welding device |
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