CN215658402U - Ultrasonic welding head and ultrasonic welding equipment with same - Google Patents

Abstract

The utility model discloses an ultrasonic welding head and ultrasonic welding equipment with the same, wherein the ultrasonic welding head comprises: an installation part; welding head portion, welding head portion locates the one end of installation department, welding head portion is formed with the welding tooth district on at least one side surface of first direction, first direction perpendicular to ultrasonic vibration direction, the welding tooth district includes a plurality of welding teeth that the interval set up, every the welding tooth includes tooth main part and arch, the tooth main part with welding head portion links to each other, the arch forms keeping away from of tooth main part one side of welding head portion, be formed with at least one edges and corners on the bellied circumference lateral wall, at least one the orientation of edges and corners is roughly parallel to ultrasonic vibration direction. According to the ultrasonic welding head disclosed by the utility model, the composite current collector can be pierced by fully utilizing the energy in ultrasonic vibration, the welding quality of a welded piece is improved, the charging and discharging performance of a battery is further improved, and in addition, the welding teeth can be conveniently machined and formed.

Description

Ultrasonic welding head and ultrasonic welding equipment with same

Technical Field

The utility model relates to the technical field of welding, in particular to an ultrasonic welding head and ultrasonic welding equipment with the same.

Background

At present, ultrasonic welding is adopted for welding a lug and a flexible connection of a common current collector (copper foil and aluminum foil), and for the lug adopting a composite film (a composite copper film and a composite aluminum film) as the current collector, the problem that the firmness between welded parts is poor and the temperature rise resistance of a welding area on the welded parts is large exists when the lug is welded with the flexible connection, so that the charging and discharging performance of a battery can be influenced.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides an ultrasonic welding head which can improve the welding quality of a welded part and is beneficial to improving the charging and discharging performance of a battery.

The utility model also provides ultrasonic welding equipment with the ultrasonic welding head.

An ultrasonic horn according to a first aspect of the utility model comprises: an installation part; welding head portion, welding head portion locates the one end of installation department, welding head portion is formed with the welding tooth district on at least one side surface of first direction, first direction perpendicular to ultrasonic vibration direction, the welding tooth district includes a plurality of welding teeth that the interval set up, every the welding tooth includes tooth main part and arch, the tooth main part with welding head portion links to each other, the arch forms keeping away from of tooth main part one side of welding head portion, be formed with at least one edges and corners on the bellied circumference lateral wall, at least one the orientation of edges and corners is roughly parallel to ultrasonic vibration direction.

According to the ultrasonic welding head disclosed by the embodiment of the utility model, the protrusion is formed on the tooth body of the welding tooth, and the peripheral wall of the protrusion is provided with at least one edge angle which is approximately parallel to the ultrasonic vibration direction, so that the composite current collector can be pierced by fully utilizing the energy in the ultrasonic vibration process, the resistance of the welding head in the welding process is reduced, the piercing effect of the welding tooth on the composite current collector in the welding process is greatly improved, the welding quality of a welded piece is improved, the charging and discharging performance of a battery is further improved, in addition, the orientation of the edge angle is approximately parallel to the ultrasonic vibration direction, and the processing and forming of the welding tooth on the welding head part can be facilitated.

According to some embodiments of the present invention, the protrusion has a plurality of edges formed on a circumferential side wall thereof, wherein two of the edges are disposed opposite to each other in a vibration direction of the ultrasonic wave.

In some embodiments, the protrusion is formed in a polygonal shape in cross section, and the corner is defined between two adjacent side faces in the circumferential direction of the protrusion.

Further, the cross section of the protrusion is formed in a quadrangular shape, and two of the edges of the protrusion are disposed opposite to each other in the vibration direction of the ultrasonic wave.

According to some embodiments of the utility model, the angle of the edge ranges from 30 to 150 °.

According to some embodiments of the present invention, the protrusion has a circumferential sidewall formed with a plurality of corners, and an angle of the corner in the ultrasonic vibration direction is smaller than an angle of the corner in other directions.

According to some embodiments of the utility model, the tooth body is formed in a convex dot shape, and each of the welding teeth includes the tooth body and one of the projections.

In some embodiments, the tooth main body is formed in a convex strip shape, each of the welding teeth includes the tooth main body and a plurality of protrusions, the plurality of protrusions are arranged at intervals along an extending direction of the tooth main body, and the extending direction of the tooth main body is parallel to a vibration direction of the ultrasonic wave.

According to some embodiments of the utility model, the height of the welding tooth is h, and the value of h ranges from 0.2mm to 5 mm.

According to some embodiments of the utility model, the welding tooth region comprises a plurality of tooth groups, each tooth group comprises at least one welding tooth, the tooth groups are arranged at intervals along a second direction, the second direction is perpendicular to the vibration direction of the ultrasonic wave and perpendicular to the first direction, when the tooth groups comprise a plurality of welding teeth, the welding teeth are arranged at intervals in the vibration direction of the ultrasonic wave, and the distance between two adjacent tooth groups is larger than the maximum width of the welding teeth in the second direction.

Further, the distance between two adjacent tooth groups is s1, and the value range of s1 is 2mm-10 mm.

Furthermore, the value range of s1 is 3.5mm-10 mm.

According to some embodiments of the utility model, the tooth body has a decreasing cross-sectional area in a direction from the horn portion to the projection, the tooth body has a bottom surface with a width s2 in the second direction, and s2 has a value in the range of 0.2mm to 3 mm; the width of the top surface of the tooth main body in the second direction is s3, the value range of s3 is 0.2mm-3mm, and s2> s 3.

According to some embodiments of the present invention, the welding tooth region includes a plurality of tooth groups, the tooth groups are spaced apart along a second direction, the second direction is perpendicular to the vibration direction of the ultrasonic wave and perpendicular to the first direction, when each of the tooth groups includes a plurality of welding teeth, the welding teeth are spaced apart in the vibration direction of the ultrasonic wave, and the distance between two adjacent tooth groups is greater than the distance between two adjacent welding teeth in each of the tooth groups.

An ultrasonic welding apparatus according to a second aspect of the present invention includes: the ultrasonic horn according to the first aspect of the present invention.

According to the ultrasonic welding equipment provided by the embodiment of the utility model, the ultrasonic welding head of the first aspect is arranged, so that the welding quality can be improved, and the resistance of a welding part and the heat generation amount in the charging and discharging processes of the battery can be reduced.

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

FIG. 1 is a schematic view of an ultrasonic horn according to one embodiment of the present invention;

FIG. 2 is a schematic view of another angle of the ultrasonic horn shown in FIG. 1;

FIG. 3 is a schematic view of yet another angle of the ultrasonic horn shown in FIG. 1;

FIG. 4 is a schematic view of the tooth area of the ultrasonic horn shown in FIG. 3;

FIG. 5 is an enlarged view of encircled portion A in FIG. 2;

FIG. 6 is a schematic view of an ultrasonic horn according to another embodiment of the present invention;

FIG. 7 is a schematic view of another angle of the ultrasonic horn shown in FIG. 6;

FIG. 8 is a schematic view of yet another angle of the ultrasonic horn shown in FIG. 6;

FIG. 9 is a schematic view of the tooth area of the ultrasonic horn shown in FIG. 8;

fig. 10 is an enlarged view of circled portion B in fig. 7.

Reference numerals:

ultrasonic horn 100:

the mounting portion 1, the connecting portion 2,

the welding head part 3, the boss 31, the welding tooth area 32, the tooth group 321, the welding tooth 33, the tooth main body 331, the protrusion 332 and the edge 333.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

An ultrasonic horn 100 according to an embodiment of the first aspect of the present invention will be described with reference to fig. 1 to 10.

Referring to fig. 1-3 or 6-8, an ultrasonic horn 100 according to an embodiment of the first aspect of the present invention includes: a mounting portion 1 and a horn portion 3.

Specifically, the ultrasonic welding head 100 may be used for welding a tab of a battery and a flexible connection, wherein a current collector of the tab may be a composite current collector such as a composite copper film, a composite aluminum film, or the like.

The welding head part 3 is arranged at one end of the mounting part 1, at least one side surface of the welding head part 3 along a first direction (for example, a direction shown in fig. 1 or 2) is provided with a welding tooth area 32, the first direction can be perpendicular to the vibration direction of the ultrasonic wave (for example, a direction shown in fig. 2 or 3), the welding tooth area 32 can comprise a plurality of welding teeth 33 arranged at intervals, each welding tooth 33 can comprise a tooth main body 331 and a protrusion 332, wherein the tooth main body 331 is connected with the welding head part 3, the protrusion 332 is formed at one side of the tooth main body 331 far away from the welding head part 3, at least one edge 333 is formed on the side wall of the protrusion 332 along the circumferential direction, and the at least one edge 333 faces to be approximately parallel to the vibration direction of the ultrasonic wave.

For example, as shown in fig. 1 and 2 or fig. 6 and 7, the mounting portion 1 may be formed in a cylindrical shape, the horn portion 3 is located at one end of the mounting portion 1 in the axial direction, and the vibration direction of the ultrasonic wave on the ultrasonic horn 100 and the axial direction of the mounting portion 1 are parallel to each other. Both the upper side surface and the lower side surface of the welding head part 3 in the first direction may be formed with the welding tooth region 32, of course, only the upper side surface may be formed with the welding tooth region 32, or only the lower side surface may be formed with the welding tooth region 32, the welding tooth region 32 may be provided with a plurality of welding teeth 33 arranged at intervals, and optionally, the welding tooth region 32 is a plane.

For example, as shown in fig. 4 and 5 or fig. 9 and 10, each welding tooth 33 may include a tooth main body 331 and a protrusion 332, where the tooth main body 331 is connected to the surface of the welding tooth region 32 of the welding head portion 3, the protrusion 332 is formed on a side surface of the tooth main body 331 facing away from the welding head portion 3, at least one corner 333 is formed on a peripheral wall of the protrusion 332, and the corner 333 faces in a direction substantially parallel to the vibration direction of the ultrasonic wave, so that the corner 333 coincides with the vibration direction of the ultrasonic wave, and energy generated during the ultrasonic wave vibration may be fully utilized to pierce the composite current collector, and resistance applied by the welding head during welding may be reduced, thereby greatly improving piercing effect of the welding tooth 33 on the composite current collector during welding, improving welding firmness, reducing resistance and temperature rise of the welded region, and further contributing to improving battery charging and discharging performance.

Here, the fact that the direction of the ridge 333 is substantially parallel to the vibration direction of the ultrasonic wave means that the included angle between the direction of the ridge 333 and the vibration direction of the ultrasonic wave is nearly parallel, but may not be completely parallel, and for example, the included angle between the direction of the ridge 333 and the vibration direction of the ultrasonic wave may be in the range of plus or minus 5 °, which facilitates the forming of the tooth 33 in the horn unit 3 and improves the tolerance during the forming.

According to the ultrasonic welding head 100 of the embodiment of the utility model, the protrusion 332 is formed on the tooth main body 331 of the welding tooth 33, and the peripheral wall of the protrusion 332 is provided with at least one edge 333 which is approximately parallel to the ultrasonic vibration direction, so that the energy in the ultrasonic vibration can be fully utilized to pierce the composite current collector, the energy loss of the ultrasonic wave can be reduced, the resistance of the welding head in the welding process can be reduced, the piercing effect of the welding tooth 33 on the composite current collector in the welding process can be greatly improved, the welding quality of a workpiece to be welded can be improved, the phenomena of large resistance and large heat generation of a welding zone caused by false welding or weak welding can be avoided, the charging and discharging performance of a battery can be further improved, in addition, the orientation of the edge 333 is approximately parallel to the ultrasonic vibration direction, and the processing and forming of the welding tooth 33 on the welding head part 3 can be facilitated.

According to some embodiments of the present invention, a plurality of edges 333 may be formed on the circumferential sidewall of the protrusion 332, wherein at least two edges 333 may be disposed opposite to each other in the ultrasonic vibration direction, so that, by increasing the number of the edges 333 of the protrusion 332 in the ultrasonic vibration direction, the piercing capability of the welding tooth 33 in the ultrasonic vibration direction for a welded component such as a composite current collector may be further improved, which is beneficial to improving the overall piercing capability of the welding tooth 33, and thus, the welding firmness may be improved, and the resistance and temperature rise of the welding zone may be reduced.

In some embodiments, the cross section of the protrusion 332 in the axial direction of the mounting portion 1 may be formed in a polygonal shape, and at this time, an edge 333 is defined between two adjacent side surfaces in the circumferential direction of the protrusion 332, thereby making the welding tooth 33 simple in structure and convenient to machine.

Further, referring to fig. 4 and 9, the cross section of the protrusion 332 may be formed in a quadrilateral shape, for example, the cross section of the protrusion 332 may be formed in a square shape, a rectangular shape, or a diamond shape, in which two corners 333 of the protrusion 332 are disposed opposite to each other in the vibration direction of the ultrasonic wave, so that the number of the corners 333 of the protrusion 332 in the vibration direction of the ultrasonic wave may be increased, the penetration capability of the welding tooth 33 to a member to be welded may be further improved, and further, the welding firmness may be improved, and the resistance and the temperature rise of the welding region may be reduced.

For example, as shown in fig. 4, the cross section of the protrusion 332 is formed into a square, and two edges 333 of the protrusion 332 along one diagonal of the square may be oppositely disposed in the vibration direction of the ultrasonic wave, so that the piercing capability of the protrusion 332 on a welded member such as a composite current collector during welding may be improved, thereby avoiding the occurrence of false welding and the like, which is helpful for improving welding quality, and meanwhile, the ultrasonic energy may be fully utilized, and energy loss may be reduced.

According to some embodiments of the present invention, the angle range of the corner 333 is 30 to 150 °, for example, the angle of the corner 333 may be 30 °, 45 °, 60 °, 90 °, 120 °, or 150 °, and the angle value of the corner 333 may be reasonably selected according to actual needs, so that it is avoided that when the angle of the corner 333 is too small, the corner 333 portion of the protrusion 332 is easily broken, dulled, or worn more, and it is also avoided that the piercing ability is reduced due to the too large angle of the corner 333, thereby affecting the welding effect.

According to some embodiments of the present invention, a plurality of corners 333 may be formed on the circumferential sidewall of the protrusion 332, wherein the angle of the corner 333 in the ultrasonic vibration direction may be smaller than the angle of the corner 333 in other directions, so that the ultrasonic energy at the corner 333 in the ultrasonic vibration direction may be more concentrated, which is more beneficial to improve the penetration capability of the corner 333 in the ultrasonic vibration direction to the welded part, and thus, the penetration capability of the entire protrusion 332 may be improved.

According to some embodiments of the present invention, referring to fig. 9 and 10, the tooth main body 331 is formed in a convex shape, where the convex shape means that lengths of the tooth main body 331 in all directions are not different, and a cross-sectional area of the tooth main body 331 is much smaller than an area of the tooth region 32, each welding tooth 33 may include a tooth main body 331 and a protrusion 332, and exactly one protrusion 332 may be received on the tooth main body 331, so that ultrasonic energy on each welding tooth 33 may be concentrated on one protrusion 332, thereby greatly improving piercing ability of a single protrusion 332 to the composite current collector, and further improving welding quality, and meanwhile, the welding tooth 33 has a simpler structure and is convenient to machine.

For example, as shown in fig. 9, the tooth main body 331 is formed substantially as a truncated pyramid, of course, the tooth main body 331 may also be formed as a truncated cone or its shape, the cross section of the truncated pyramid in the horizontal direction is formed as a square, that is, the length of each side wall of the tooth main body 331 in the circumferential direction is equal, meanwhile, the cross section area of the tooth main body 331 is much smaller than the area of the tooth welding zone 32, the cross section of the protrusion 332 is formed as a square, each vertex of the cross section of the protrusion 332 is located on the circumferential edge of one end face of the tooth main body 331 away from the welding head portion 3, that is, just one protrusion 332 can be accommodated on the tooth main body 331, so that the ultrasonic energy on each welding tooth 33 can be concentrated on one protrusion 332, thereby greatly improving the piercing ability of the single protrusion 332 for piercing the composite current collector, and further improving the welding quality, and meanwhile, the structure of the welding tooth 33 is simpler and is convenient for processing and forming.

In other embodiments, referring to fig. 4 and 5, the tooth main body 331 may be formed in a convex strip shape, where the convex strip shape means that the length of the tooth main body 331 in one direction is much longer than the length of the tooth main body 331 in the other direction, so that the protrusion 332 is formed in a strip shape, at this time, each welding tooth 33 may include the tooth main body 331 and a plurality of protrusions 332, the plurality of protrusions 332 may be arranged at intervals along the extending direction of the tooth main body 331, and the extending direction of the tooth main body 331 may be parallel to the vibration direction of the ultrasonic wave, thereby, a single welding tooth 33 may weld a plurality of portions to be welded simultaneously, and meanwhile, compared with the case where the protrusions 332 are arranged densely on the tooth main body 331, under the condition that the surface area of the tooth main body 331 is not changed, since the plurality of protrusions 332 are arranged at intervals, the number of protrusions 332 on the tooth main body 331 is reduced, the pressure of each protrusion 332 on the current collector during welding may be increased, thereby facilitating the protrusion 332 to pierce the current collector, the welding quality is improved.

For example, as shown in fig. 5, the tooth main body 331 may be formed in a truncated pyramid shape, the length of the tooth main body 331 is much greater than the width of the tooth main body 331, the longitudinal direction of the tooth main body 331 and the vibration direction of the ultrasonic wave are parallel to each other, that is, the longitudinal direction of the tooth main body 331 and the axial direction of the mounting portion 1 are parallel to each other, a plurality of protrusions 332 are provided on the tooth main body 331, the plurality of protrusions 332 are provided at intervals along the longitudinal direction of the tooth main body 331, the cross section of each protrusion 332 is formed in a square shape, and two vertexes of each protrusion 332 in the direction perpendicular to the axial direction of the mounting portion 1 are respectively located on the long sides of one end face of the tooth main body 331 away from the welding head portion 3. From this, a plurality of positions that a piece can be treated to single welding tooth 33 weld simultaneously, compare with protruding 332 intensive the arranging on tooth main part 331, under the unchangeable condition of surface area of tooth main part 331, because a plurality of protruding 332 intervals set up, the quantity of the protruding 332 on the tooth main part 331 reduces, can increase the pressure of every arch 332 to the current collector to be favorable to protruding 332 to pierce through the current collector, improve welding quality.

According to some embodiments of the present invention, the height of the welding tooth 33 is h, and the value of h ranges from 0.2mm to 5mm, for example, the value of h may be 0.2mm, 0.3mm, 0.5mm, 1mm, 1.1mm, 2mm, 3mm, 4mm or 5mm, and in this range, it may be prevented that when the height of the welding tooth 33 is too small, for example, less than 0.2mm, the height of the protrusion 332 is too small, so that the protrusion 332 cannot pierce the current collector or the piercing effect is poor, the welding quality is poor, the welding is not firm, and the processing is difficult, and it may be avoided that when the height of the welding tooth 33 is too large, for example, more than 5mm, the welding tooth 33 is easily broken or the abrasion of the welding tooth 33 is aggravated.

Preferably, the height h of the welding tooth 33 may range from 0.2mm to 0.3mm or from 1.1mm to 5mm, and at this time, the welding tooth 33 of this embodiment can ensure that the welding tooth 33 can effectively pierce through the composite current collector to be welded, can prevent the welding tooth 33 from being worn and broken, and is convenient for processing and forming.

According to some embodiments of the present invention, referring to fig. 9, the tooth zone 32 may include a plurality of tooth groups 321, each tooth group 321 may include at least one welding tooth 33, the plurality of tooth groups 321 may be spaced along a second direction (e.g., a b direction shown in fig. 4 or fig. 9), the second direction is perpendicular to the vibration direction of the ultrasonic wave, and the second direction is perpendicular to the first direction, when the tooth group 321 includes a plurality of welding teeth 33, the plurality of welding teeth 33 may be spaced in the vibration direction of the ultrasonic wave, and the spacing between two adjacent tooth groups 321 is greater than the maximum width of the welding teeth 33 in the second direction (i.e., the maximum value of s2 described below), that is, the spacing between two adjacent welding teeth 33 in the second direction is greater than the maximum width of a single welding tooth 33 in the second direction, so that the pivot density of the distribution of the welding teeth 33 can be more reasonable, and the layout can be optimized, can be when arch 332 pierces through compound mass flow body, provide the space of dodging for the compound mass flow body of deformation to under equal exogenic action, weld tooth 33 and be bigger to the pressure that compound mass flow body produced, pierce through compound mass flow body when the welding more easily, thereby promote welding quality and welded firm degree.

In addition, because the composite current collector is different from a conventional copper foil, the composite current collector cannot conduct electricity along the thickness direction of the composite current collector and can only conduct electricity along the copper layer on the surface of the composite current collector, and therefore, when a larger distance is reserved between two adjacent tooth groups 321, the integrity of the copper layer of the composite current collector in the second direction can be ensured, and the overcurrent capacity of the composite current collector can be ensured.

Further, the distance between two adjacent tooth sets 321 is s1, and the value range of s1 is 2mm-10mm, for example, the value range of s1 may be 2mm, 2.5mm, 3mm, 3.5mm, 5mm, 8mm, or 10mm, so that it may be prevented that, when the distance between two adjacent tooth sets 321 is too small, for example, less than 2mm, the arrangement of the welding teeth 33 in the second direction is too dense, which may cause the piercing capability of the welding teeth 33 to decrease and the overcurrent capability of the conforming current collector strip to decrease, and also may be prevented that, when the distance between two adjacent tooth sets 321 is too large, for example, greater than 10mm, the arrangement of the welding teeth 33 is too sparse, which may cause a decrease in welding efficiency, and the number of welding points of the multi-layer composite current collector after welding is too small, which may cause the resistance at the welding point to be too large, which may also increase the heat generation amount, and even may cause a decrease in reliability of the connections to be connected.

Preferably, the value range of s1 is 3.5mm-10mm, for example, the value of s1 may be 3.5mm, 5mm, 6mm, 8mm or 10mm, and the value of s1 may be reasonably selected according to actual needs, so that not only can the welding teeth 33 be ensured to have sufficient piercing capacity for the composite current collector, but also the integrity of the copper layer of the composite current collector along the second direction can be further ensured, the contact area of a plurality of parts to be welded after welding is ensured to be sufficiently large, the resistance and the heat generation amount at the welding position are reduced, and the reliability of connection of the parts to be welded is improved.

According to some embodiments of the present invention, referring to fig. 5 and 10, the cross-sectional area of the tooth main body 331 may be gradually reduced in the direction from the welding head portion 3 to the projection 332, so that the energy loss during ultrasonic welding may be reduced, and the defects of false welding and over-welding which may be caused during welding may be avoided.

The width of the bottom surface of the tooth main body 331 in the second direction is s2, and the value of s2 ranges from 0.2mm to 3mm, for example, s2 may be 0.2mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, or 3mm, where the maximum value of s2 is the maximum value of the width of the welding tooth 33 in the second direction; the width of the top surface of the tooth main body 331 in the second direction is s3, the range of s3 is 0.2mm-3mm, for example, the range of s3 may be 0.2mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm or 3mm, and here, the minimum value of s3 is the minimum value of the welding tooth 33 in the second direction, so that not only the difficulty in processing caused by the too small size of the tooth main body 331 of the welding tooth 33 can be avoided, but also the weakening of the piercing capability of the composite current collector when the size of the welding tooth 33 is too large can be avoided.

In addition, s2> s3, that is, the width of the bottom surface of the tooth main body 331 in the second direction is always greater than the width of the top surface of the tooth main body 331 in the second direction, that is, the cross-sectional area of the tooth main body 331 in the direction from the bottom surface to the top surface is gradually reduced, so that the energy loss during ultrasonic welding can be reduced, the defects of false welding and over welding which may be caused during welding can be avoided, and the welding quality is improved.

Preferably, the width s2 of the bottom surface of the tooth main body 331 in the second direction may range from 0.2mm to 0.5mm or from 2.1mm to 3mm, the width s3 may range from 0.2mm to 0.5mm or from 2.1mm to 3mm, and s2> s3, whereby it is possible to ensure sufficient penetration ability of the welding tooth 33 to a welded member to ensure welding quality while facilitating processing.

Referring to fig. 9, the tip region 32 may include a plurality of tip groups 321, and the plurality of tip groups 321 may be spaced apart in a second direction, which is perpendicular to the vibration direction of the ultrasonic waves, and the second direction is perpendicular to the first direction, when each tooth group 321 comprises a plurality of welding teeth 33, the plurality of welding teeth 33 are arranged at intervals in the vibration direction of the ultrasonic wave, the distance between two adjacent tooth groups 321 is larger than the distance between two adjacent welding teeth 33 in each tooth group 321, therefore, when the parts to be welded are composite current collectors, because the composite current collectors are different from conventional copper foils, it cannot conduct electricity along its own thickness direction, but only along the copper layer on the surface of the composite current collector, therefore, when a larger distance is reserved between two adjacent tooth groups 321, the integrity of the copper layer of the composite current collector in the second direction can be ensured, so that the overcurrent capacity of the composite current collector can be ensured.

According to some embodiments of the present invention, as shown in fig. 5 and 10, the arc transition connection between the bottom of the peripheral wall of the tooth body 331 of the tooth 33 and the tooth zone 32 can reduce the ultrasonic energy loss on one hand, and on the other hand, can reduce the risk of fatigue fracture of the tooth 33, which helps to prolong the working life of the welding head, and at the same time, has a simple structure and is easy to process.

According to some embodiments of the present invention, referring to fig. 1 and 2 or fig. 6 and 7, at least one side of the end of the welding head portion 3 facing away from the mounting portion 1 is formed with a boss 31 along the circumference thereof, the boss 31 is formed as a flat surface along the outer end surface of the welding head portion 3 in the radial direction, and at least a part of the outer end surface of the boss 31 is formed as a tooth zone 32, so that, by providing the boss 31, on one hand, the ultrasonic energy is gathered, and on the other hand, since the boss 31 has a certain height, when an interference object is present around the welded member, the boss 31 can facilitate the avoidance of the welding tooth 33 from the interference object, thereby facilitating the welding, and further, the boss 31 can provide a receiving space for the welding tooth 33, thereby facilitating the machining and forming of the welding tooth 33.

In some embodiments, referring to fig. 2 and 3 or fig. 7 and 8, ultrasonic horn 100 may further comprise: connecting portion 2, specifically, connecting portion 2 locates between installation department 1 and bonding tool portion 3, and connecting portion 2 is used for connecting installation department 1 and bonding tool portion 3, and wherein, the cross-sectional area of bonding tool portion 3 is less than the cross-sectional area of connecting portion 2, and the cross-sectional area of connecting portion 2 is less than the cross-sectional area of installation department 1, and the both ends of connecting portion 2 are connected with installation department 1 and bonding tool portion 3 circular arc respectively, can further avoid ultrasonic energy loss from this, help improving the welding effect.

The following table is a comparison table of the welding effect of the ultrasonic horn 100 according to the embodiment of the present invention and the welding area of the ultrasonic horn in the related art after the welding of the workpiece to be welded is completed.

Table-welding zone temperature rise comparison table

Resistance comparison meter for current collector welding area of two different layers of meter

The comparative examples 1 to 7 in the table one are comparison tables of temperature rise conditions of the welding region on the composite current collector at different times when the ultrasonic welding head 100 of the embodiment of the present invention and the ultrasonic welding head 100 as a reference act on the same composite current collector in the welding process, and it can be seen from the table one that the ultrasonic welding head 100 of the embodiment of the present invention has stronger piercing capability on the composite current collector, so that the connection effect of the welded member is better, the temperature rise of the welding region on the welded member is lower, and the improvement of the charge and discharge performance of the battery is facilitated.

The comparative examples 1 to 7 in the second table are tables comparing resistance conditions of welding areas on different layers of composite current collectors after the ultrasonic welding head 100 of the second embodiment of the present invention and the ultrasonic welding head 100 used as a reference finish welding the multilayer composite current collectors of the battery, and it can be seen from the second table that the ultrasonic welding head 100 of the second embodiment of the present invention has stronger piercing capability on the composite current collectors, so that the connection effect of the welding areas on the composite current collectors is better, the resistance of the welding areas is reduced, and the charging and discharging performance of the battery is improved.

An ultrasonic welding apparatus according to an embodiment of the second aspect of the present invention is described below.

An ultrasonic welding apparatus according to a second aspect of the present invention includes: an ultrasonic horn 100 according to the above-described embodiment of the present invention.

According to the ultrasonic welding equipment of the utility model, by arranging the ultrasonic welding head 100 of the embodiment, the welding quality can be improved, and the resistance of a welding part and the heat generation amount in the charging and discharging processes of the battery can be reduced.

Other configurations of ultrasonic welding apparatus, such as ultrasonic generators, transducers, etc., and operations according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (15)

1. An ultrasonic horn, comprising:

an installation part;

the welding head part is arranged at one end of the mounting part, a welding tooth area is formed on at least one side surface of the welding head part in a first direction, the first direction is perpendicular to the vibration direction of the ultrasonic wave, the welding tooth area comprises a plurality of welding teeth arranged at intervals,

each welding tooth comprises a tooth main body and a protrusion, the tooth main body is connected with the welding head portion, the protrusion is formed on one side, far away from the welding head portion, of the tooth main body, at least one edge angle is formed on the circumferential side wall of the protrusion, and the direction of the at least one edge angle is approximately parallel to the vibration direction of ultrasonic waves.

2. The ultrasonic horn of claim 1 wherein the raised peripheral sidewall has a plurality of corners formed thereon, two of the corners being disposed opposite in the direction of ultrasonic vibration.

3. The ultrasonic horn of claim 1 wherein the cross-section of the projection is formed as a polygon, the corners being defined between two circumferentially adjacent sides of the projection.

4. The ultrasonic horn of claim 3 wherein the cross-section of the projection is formed in a quadrilateral shape, two of the corners of the projection being disposed opposite in the direction of vibration of the ultrasonic wave.

5. An ultrasonic horn according to claim 1 wherein the angle of the ridge is in the range of 30-150 °.

6. The ultrasonic horn of claim 1 wherein the raised peripheral sidewall has a plurality of corners formed thereon, the corners in the direction of ultrasonic vibration having a smaller angle than the corners in other directions.

7. The ultrasonic horn of claim 1 wherein the tooth bodies are formed in the shape of a raised dot, each of the welding teeth comprising the tooth body and one of the projections.

8. The ultrasonic horn of claim 1 wherein the tooth body is formed in a convex strip shape, each of the welding teeth comprising the tooth body and a plurality of the projections arranged at intervals along an extending direction of the tooth body, the extending direction of the tooth body being parallel to a vibration direction of the ultrasonic wave.

9. The ultrasonic horn of claim 1 wherein the teeth have a height h, the h being in the range of 0.2mm to 5 mm.

10. An ultrasonic horn according to any one of claims 1 to 9 wherein the horn tip region comprises a plurality of sets of teeth, each set of teeth comprising at least one of the horn tips, the plurality of sets of teeth being spaced apart in a second direction perpendicular to the direction of vibration of the ultrasonic waves and perpendicular to the first direction, the plurality of horn tips being spaced apart in the direction of vibration of the ultrasonic waves when the set of teeth comprises a plurality of the horn tips, the spacing between adjacent sets of teeth being greater than the maximum width of the horn tip in the second direction.

11. The ultrasonic horn of claim 10 wherein the spacing between adjacent sets of teeth is s1, and s1 is in the range of 2mm to 10 mm.

12. An ultrasonic horn according to claim 11 wherein s1 has a value in the range 3.5mm to 10 mm.

13. The ultrasonic horn of claim 10 wherein the tooth body has a decreasing cross-sectional area in a direction from the horn portion to the projection, the tooth body has a bottom surface with a width in the second direction of s2, s2 ranging from 0.2mm to 3 mm;

the width of the top surface of the tooth main body in the second direction is s3, the value range of s3 is 0.2mm-3mm, and s2> s 3.

14. The ultrasonic horn of claim 1 wherein the horn tip region comprises a plurality of sets of tips spaced apart in a second direction perpendicular to the direction of ultrasonic vibration and perpendicular to the first direction, wherein when each set of tips comprises a plurality of the horn tips, the plurality of horn tips are spaced apart in the direction of ultrasonic vibration, and wherein the spacing between two adjacent sets of tips is greater than the spacing between two adjacent horn tips in each set.

15. An ultrasonic welding apparatus, comprising: the ultrasonic horn of any one of claims 1-14.

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