Welding head structure and welding device

Abstract

The utility model relates to a welding head structure and a welding device. The welding head structure comprises a welding head body and a welding tooth assembly, wherein the welding head body is provided with a welding surface; the welding tooth assembly is arranged on the welding face and comprises a first welding tooth set and a second welding tooth set, and the first welding tooth set comprises a plurality of first welding teeth arranged in an array mode; the second welding tooth set comprises a plurality of second welding teeth arranged at intervals, the second welding teeth are arranged around the periphery of the first welding tooth set at intervals, each second welding tooth is provided with a first circumferential side wall, and the included angle alpha between the first circumferential side wall and the welding face is larger than or equal to 45 degrees and smaller than or equal to 60 degrees. The welding head structure has good use performance.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a welding head structure and a welding device. Background Art

[0002] Ultrasonic welding is generally used in the pre-welding of multi-layer tabs of conventional square shell batteries. The tabs are first welded by ultrasonic flat-tooth welding to form a strong and rough weld mark, and then the tab weld mark is welded together with the pins of the top cover by laser welding to achieve conduction between the battery cell and the top cover, so that the battery cell can better flow current to the top cover pole. However, the common welding head texture may cause cracking of the tab weld mark edge during the welding process, or cause the tab weld mark edge to be blurred, thereby reducing the accuracy of the laser welding equipment's scanning of the weld mark. Utility Model Content

[0003] In view of this, the present application provides a welding head structure and a welding device, wherein the welding head structure has good performance.

[0004] The present application provides a welding head structure, which includes: a welding head body and a welding tooth assembly, wherein the welding head body has a welding surface; the welding tooth assembly is arranged on the welding surface, and the welding tooth assembly includes a first welding tooth group and a second welding tooth group, wherein the first welding tooth group includes a plurality of first welding teeth arranged in an array; the second welding tooth group includes a plurality of second welding teeth arranged at intervals, wherein the plurality of second welding teeth are arranged at intervals around the outer periphery of the first welding tooth group, and the second welding tooth has a first peripheral side wall, and the range of the angle α between the first peripheral side wall and the welding surface is: 45°≤α≤60°.

[0005] Further, the area of ​​the surface of the first welding tooth facing away from the welding surface is greater than or equal to the area of ​​the surface of the second welding tooth facing away from the welding surface.

[0006] Furthermore, the surface of the first welding tooth away from the welding surface has an inscribed circle, the radius of the inscribed circle is r1, and the radius of the equivalent circle of the surface of the second welding tooth away from the welding surface is r2, then the relationship is satisfied: r2≤r1.

[0007] Furthermore, an equivalent circle radius r2 of a surface of the second welding tooth away from the welding surface satisfies the range: 0.34 mm ≤ r2 ≤ 0.5 mm.

[0008] Furthermore, a side of the second welding tooth facing away from the welding surface has a chamfer, and a radius r3 of the chamfer satisfies the range: 0.1 mm≤r3≤0.2 mm.

[0009] Further, the height h1 of the first welding tooth protruding from the welding surface satisfies the range: 0.15 mm ≤ h1 ≤ 0.2 mm, and the height h2 of the second welding tooth protruding from the welding surface satisfies the range: 0.15 mm ≤ h2 ≤ 0.2 mm.

[0010] Further, the first welding tooth has a second circumferential side wall, and the included angle between the second circumferential side wall and the welding surface is β, then the relational expression is satisfied: 0.9 ≤ α / β ≤ 1.1.

[0011] Further, the first welding tooth is a frustum of a pyramid, and the second welding tooth is a frustum of a cone.

[0012] Further, the surface of the first welding tooth facing away from the welding surface is a rhombus and has a first diagonal line and a second diagonal line. The first diagonal line of each first welding tooth extends along a first direction, and the second diagonal line of each first welding tooth extends along a second direction; along the first direction, the first diagonal lines of two adjacent first welding teeth are staggeredly arranged; along the second direction, the second diagonal lines of two adjacent first welding teeth are staggeredly arranged, wherein the first direction intersects with the second direction.

[0013] The present application provides a welding device, which includes: a device body and the welding head structure provided by the present application. The welding head structure is arranged on the device body to weld a target object.

[0014] In the present application, on the one hand, the plurality of second welding teeth are arranged at intervals around the outer periphery of the first welding tooth group. When the welding head structure is used to weld a target object, the welding head structure can form a weld mark on the surface of the target object and the edge of the weld mark is clear. When a scanned piece is used to scan the target object, the edge of the weld mark can be clearly captured, and the size of the weld mark can be clearly obtained, so as to improve the recognition accuracy and imaging accuracy of the scanned piece for the target object and facilitate the further positioning and processing of the target object. On the other hand, the included angle α between the first circumferential side wall of the second welding tooth and the welding surface satisfies the range of 45° ≤ α ≤ 60°, so that stress concentration can be avoided during the process of the welding head structure welding the target object, and the risk of cracking at the edge of the target object during the process of the welding head structure welding the target object can be reduced, and the service performance of the welding head structure can be improved. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0016] Figure 1 Structural schematic diagram of a welding head structure according to an embodiment of the present application;

[0017] Figure 2 Top view structural schematic diagram of a welding head structure according to an embodiment of the present application;

[0018] Figure 3 is Figure 2 Cross-sectional view in the A-A direction in

[0019] Figure 4 is Figure 3 Enlarged view of the B dashed box in

[0020] Figure 5 is Figure 2 Enlarged view of the C dashed box in

[0021] Figure 6 is Figure 1 Enlarged view of the D dashed box in

[0022] Figure 7 is Figure 2 Cross-sectional view in the E-E direction in

[0023] Figure 8 is Figure 7 Enlarged view of the F dashed box in

[0024] Figure 9 Structural schematic diagram of a welding device according to an embodiment of the present application.

[0025] Explanation of reference numerals:

[0026] 100 - Welding head structure, 110 - Welding head body, 111 - Welding surface, 120 - Welding tooth assembly, 121 - First welding tooth group, 122 - Second welding tooth group, 123 - First welding tooth, 1231 - Second circumferential side wall, 1232 - First diagonal line, 1233 - Second diagonal line, 124 - Second welding tooth, 1241 - First circumferential side wall, 1242 - Chamfer, 200 - Welding device, 210 - Device body. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0028] In the description and claims of this application, and in the above-mentioned drawings, terms such as "first" and "second" are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products or devices.

[0029] Reference to "embodiment" or "embodiment mode" in this context means that a specific feature, structure or characteristic described in connection with the embodiment or embodiment mode may be included in at least one embodiment of this application. The occurrence of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] In the conventional multi-layer tab pre-welding of square shell battery cells, ultrasonic welding is generally used. First, the tabs are welded by ultrasonic flat tooth welding to form a strong and rough weld mark, and then the tab weld mark is welded to the pin of the top cover by laser welding to achieve the conduction between the battery cell and the top cover, so that the battery cell can better conduct current to the top cover terminal.

[0031] During the welding process of common welding head patterns, when the edge of the welding head compacts the tab and starts to vibrate, the edge of the tab weld mark cracks. In addition, if the pattern of the welding head is blurred, it may cause the edge of the tab weld mark to be blurred. When the laser welding equipment further laser-welds the pre-welded tabs, the scanning parts of the laser welding equipment, such as CCD cameras, take pictures of the tabs, and the accuracy of capturing the weld mark edge is reduced, resulting in frequent cases of incorrect edge grasping dimensions, which is not conducive to the further welding of the tabs by the laser welding equipment.

[0032] Please refer to Figures 1 to 4 , this application provides a welding head structure 100, the welding head structure 100 includes: a welding head body 110 and a welding tooth assembly 120, the welding head body 110 has a welding surface 111; the welding tooth assembly 120 is arranged on the welding surface 111, the welding tooth assembly 120 includes a first welding tooth group 121 and a second welding tooth group 122, the first welding tooth group 121 includes a plurality of first welding teeth 123 arranged in an array; the second welding tooth group 122 includes a plurality of second welding teeth 124 arranged at intervals, the plurality of second welding teeth 124 are arranged at intervals around the outer periphery of the first welding tooth group 121, the second welding tooth 124 has a first circumferential side wall 1241, and the range of the angle α between the first circumferential side wall 1241 and the welding surface 111 is: 45° ≤ α ≤ 60°.

[0033] Specifically, the value of the included angle α between the first circumferential side wall 1241 of the second solder tooth 124 and the welding surface 111 can be, but is not limited to, 45°, 47°, 49°, 50°, 52°, 53°, 54°, 56°, 57°, 58°, 59°, 60°, etc.

[0034] It can be understood that the first solder tooth group 121 is arranged at the center of the welding surface 111, and a plurality of second solder teeth 124 of the second solder tooth group 122 are arranged at intervals around the outer periphery of the first solder tooth group 121.

[0035] In this embodiment, on the one hand, the plurality of second solder teeth 124 are arranged at intervals around the outer periphery of the first solder tooth group 121. When the welding head structure 100 is used to weld a target object, the welding head structure 100 can form a welding mark on the surface of the target object and the edge of the welding mark is clear. When using a scanned part to scan the target object, the edge of the welding mark can be clearly captured, and the size of the welding mark can be clearly obtained, so as to improve the recognition accuracy and imaging accuracy of the scanned part for the target object, and facilitate the further positioning and processing of the target object. On the other hand, the included angle α between the first circumferential side wall 1241 of the second solder tooth 124 and the welding surface 111 satisfies the range of 45° ≤ α ≤ 60°, so as to avoid stress concentration during the welding process of the welding head structure 100 to the target object, reduce the risk of cracking at the edge of the target object during the welding process of the welding head structure 100 to the target object, and improve the service performance of the welding head structure 100.

[0036] It can be understood that the area of the welding mark formed by the welding head structure 100 on the target object corresponds to the area where the solder tooth assembly 120 of the welding head structure 100 is located.

[0037] Optionally, in some embodiments, the target object is a multi-layer tab, and the welding head structure 100 is used to weld the multi-layer tab into one body and generate a welding mark. The welding head structure 100 is used to weld the multi-layer tab, so that the welding mark left on the multi-layer tab is clear and will not cause cracking at the edge of the welding mark of the multi-layer tab, which is beneficial for the scanned part of the laser welding equipment to scan and locate the welding mark, and is convenient for the laser welding equipment to further process the multi-layer tab.

[0038] Optionally, in some embodiments, the shape of the surface of the first solder tooth 123 facing away from the welding surface 111 can be, but is not limited to, a rhombus, a square, a rectangle, a parallelogram, a pentagon, etc.

[0039] Optionally, the shape of the surface of the second solder tooth 124 facing away from the welding surface 111 can be, but is not limited to, a circle, an ellipse, a quasi-circle, etc., where the quasi-circle is between a circle and an ellipse.

[0040] In some embodiments, the area of the surface of the first welding tooth 123 facing away from the welding surface 111 is greater than or equal to the area of the surface of the second welding tooth 124 facing away from the welding surface 111.

[0041] In this embodiment, the area of the surface of the first welding tooth 123 facing away from the welding surface 111 is greater than or equal to the area of the surface of the second welding tooth 124 facing away from the welding surface 111, so as to ensure that the first welding tooth 123 has a larger welding surface area when welding the target object. In addition, it is also beneficial to arrange each second welding tooth 124 at intervals between two adjacent first welding teeth 123, improving the density of the first welding tooth 123 and the second welding tooth 124 arranged on the welding surface 111. When the welding tooth structure is used to weld the target object, it is beneficial to increase the area of the welding mark, thereby facilitating the further processing of the target object and improving the service performance of the welding head structure 100.

[0042] Please refer to Figure 5 , in some embodiments, the surface of the first welding tooth 123 facing away from the welding surface 111 has an inscribed circle, the radius of the inscribed circle is r1, and the equivalent circle radius of the surface of the second welding tooth 124 facing away from the welding surface 111 is r2, then the relational expression is satisfied: r2 ≤ r1.

[0043] It can be understood that the shape of the surface of the first welding tooth 123 facing away from the welding surface 111 is a regular polygon, and the first welding tooth 123 has an inscribed circle.

[0044] It can be understood that the shape of the surface of the second welding tooth 124 facing away from the welding surface 111 is circular, elliptical or quasi-circular, etc. Among them, the quasi-circular shape is between the circular and elliptical shapes. When the shape of the surface of the second welding tooth 124 facing away from the welding surface 111 is circular, the equivalent circle radius of the surface of the second welding tooth 124 facing away from the welding surface 111 is the radius of the circle.

[0045] In this embodiment, when the radius r1 of the inscribed circle and the equivalent circle radius r2 of the surface of the second welding tooth 124 facing away from the welding surface 111 satisfy the relational expression r2 ≤ r1, the equivalent circle radius of the surface of the second welding tooth 124 facing away from the welding surface 111 is within a reasonable range, so that when the plurality of second welding teeth 124 are arranged at intervals around the outer periphery of the first welding tooth group 121, each second welding tooth 124 can be arranged at intervals between two adjacent first welding teeth 123 and be closely arranged with the first welding tooth 123. On the one hand, it can ensure the welding surface area of the welding head structure 100 when welding the target object, and on the other hand, it can make the welding mark left by the welding head structure 100 on the target object have a clear boundary, which is convenient for subsequent scanning of the welding mark of the welding head structure 100 on the target object and improves the service performance of the welding head structure 100.

[0046] Preferably, the equivalent circle radius of the surface of the second welding tooth 124 facing away from the welding surface 111 is equal to the radius of the inscribed circle, so that each second welding tooth 124 can be arranged at intervals between two adjacent first welding teeth 123, and the second welding tooth 124 and the first welding tooth 123 are closely arranged.

[0047] In some embodiments, the equivalent circle radius r2 of the surface of the second welding tooth 124 facing away from the welding surface 111 satisfies the range: 0.34 mm ≤ r2 ≤ 0.5 mm.

[0048] Specifically, the value of the equivalent circle radius r2 of the surface of the second welding tooth 124 facing away from the welding surface 111 can be, but is not limited to, 0.34 mm, 0.35 mm, 0.37 mm, 0.39 mm, 0.4 mm, 0.41 mm, 0.42 mm, 0.45 mm, 0.46 mm, 0.48 mm, 0.49 mm, and 0.5 mm, etc.

[0049] When the equivalent circular radius r2 of the surface of the second welding tooth 124 facing away from the welding surface 111 satisfies the range 0.34 mm ≤ r2 ≤ 0.5 mm, the equivalent circular radius of the surface of the second welding tooth 124 facing away from the welding surface 111 is within a reasonable range, so that when the welding head structure 100 is used to weld a target object, the contact area between the second welding tooth 124 and the target object is within a reasonable range, which is beneficial to realizing effective welding of the target object, improving the welding performance, and making the size of the welding mark left by the welding head structure 100 on the target object within a reasonable range, facilitating the subsequent processing of the target object. When the equivalent circular radius of the surface of the second welding tooth 124 facing away from the welding surface 111 is too large, it is difficult to arrange the second welding tooth 124 between two adjacent first welding teeth 123, increasing the distance between the first welding tooth 123 and the second welding tooth 124, making the distance between the welding mark left by the first welding tooth 123 on the target object and the welding mark left by the second welding tooth 124 on the target object too large, which is not convenient for the subsequent processing of the target object. When the equivalent circular radius of the surface of the second welding tooth 124 facing away from the welding surface 111 is too small, during the welding process of the welding head structure 100 to the target object, stress concentration may occur, causing the edge of the target object to crack, reducing the service performance of the welding head structure 100.

[0050] Optionally, the ratio A of the equivalent circular radius of the surface of the second welding tooth 124 facing away from the welding surface 111 to the equivalent circular radius of the surface of the second welding tooth 124 facing the welding surface 111 satisfies the range: 0.68 ≤ A ≤ 0.77 mm. Wherein, the ratio A of the equivalent circular radius of the surface of the second welding tooth 124 facing away from the welding surface 111 to the equivalent circular radius of the surface of the second welding tooth 124 facing the welding surface 111 is within a reasonable range, so that the contact area between the second welding tooth 124 and the target object is within a reasonable range, and stress concentration of the second welding tooth 124 during the welding process can be avoided, causing the edge of the target object to crack, and improving the service performance of the welding head structure 100.

[0051] Please refer to Figure 4 and Figure 6 , in some embodiments, the side of the second welding tooth 124 facing away from the welding surface 111 has a chamfer 1242, and the radius r3 of the chamfer 1242 satisfies the range: 0.1 mm ≤ r3 ≤ 0.2 mm.

[0052] Specifically, the value of the radius r3 of the chamfer 1242 can be, but is not limited to, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, and 0.2 mm, etc.

[0053] In this embodiment, a chamfer 1242 is provided on the side of the second welding tooth 124 facing away from the welding surface 111. On the one hand, when the welding head structure 100 is used to weld a target object, the chamfer 1242 can buffer between the second welding tooth 124 and the target object, preventing the junction between the surface of the second welding tooth 124 facing away from the welding surface 111 and the first circumferential side wall 1241 from being too sharp and causing the edge of the target object to crack, thereby improving the performance of the welding head structure 100. On the other hand, the chamfer 1242 can reduce the stress of the welding head structure 100 during welding of the target object, thereby reducing the degree of wear on the edge of the welding head body 110 having the welding surface 111, which is beneficial to extending the service life of the welding head structure 100. When the radius r3 of the chamfer 1242 satisfies the range of 0.1 mm ≤ r3 ≤ 0.2 mm, the radius of the chamfer 1242 is within a reasonable range, which can not only prevent the welding head structure 100 from piercing the edge of the target object during welding of the target object, but also prevent the chamfer 1242 from being too large and reducing the area of the surface of the second welding tooth 124 facing away from the welding surface 111, enabling the second welding tooth 124 to have a large contact area with the target object and leaving a large weld mark on the target object, facilitating further processing of the target object and improving the performance of the welding head structure 100.

[0054] Optionally, in some embodiments, the end face of the first welding tooth 123 facing away from the welding surface 111 is flush with the end face of the second welding tooth 124 facing away from the welding surface 111, facilitating the welding of the welding head structure 100 to the target object.

[0055] Please refer to Figure 4 、 Figure 7 and Figure 8 , in some embodiments, the height h1 of the first welding tooth 123 protruding from the welding surface 111 satisfies the range: 0.15 mm ≤ h1 ≤ 0.2 mm, and the height h2 of the second welding tooth 124 protruding from the welding surface 111 satisfies the range: 0.15 mm ≤ h2 ≤ 0.2 mm.

[0056] Specifically, the value of the height h1 of the first welding tooth 123 protruding from the welding surface 111 can be, but is not limited to, 0.15 mm, 0.155 mm, 0.16 mm, 0.165 mm, 0.17 mm, 0.175 mm, 0.18 mm, 0.185 mm, 0.19 mm, 0.195 mm, and 0.2 mm, etc.

[0057] Specifically, the value of the height h2 of the second welding tooth 124 protruding from the welding surface 111 may be, but is not limited to, 0.15 mm, 0.155 mm, 0.16 mm, 0.165 mm, 0.17 mm, 0.175 mm, 0.18 mm, 0.185 mm, 0.19 mm, 0.195 mm, 0.2 mm, etc.

[0058] It can be understood that the height of the first welding tooth 123 protruding from the welding surface 111 and the height of the second welding tooth 124 protruding from the welding surface 111 directly affect the energy transfer efficiency during the welding process of the welding head structure 100 to the target object and the fusion degree of the welding interface. In this embodiment, when the height h1 of the first welding tooth 123 protruding from the welding surface 111 satisfies the range 0.15 mm ≤ h1 ≤ 0.2 mm, and the height h2 of the second welding tooth 124 protruding from the welding surface 111 satisfies the range 0.15 mm ≤ h2 ≤ 0.2 mm, the height of the first welding tooth 123 protruding from the welding surface 111 and the height of the second welding tooth 124 protruding from the welding surface 111 are both within a reasonable range, so that the first welding tooth 123 and the second welding tooth 124 can ensure the effective transmission of ultrasonic vibration energy to the welding interface. When the welding head structure 100 is used to weld the target object, the first welding tooth 123 and the second welding tooth 124 leave welding marks on the target object, which is convenient for further processing of the target object. Specifically, when the target object is a multi-layer tab, the height of the first welding tooth 123 protruding from the welding surface 111 and the height of the second welding tooth 124 protruding from the welding surface 111 are sufficient to weld the multi-layer tab into one body and leave welding marks on the multi-layer tab, so as to facilitate subsequent laser welding equipment to further weld the multi-layer tab. When the height of the first welding tooth 123 protruding from the welding surface 111 and the height of the second welding tooth 124 protruding from the welding surface 111 are too large, the first welding tooth 123 and the second welding tooth 124 may generate too much heat, resulting in excessive melting or oxidation of the target object at the welding interface, reducing the welding performance of the welding head structure 100. When the height of the first welding tooth 123 protruding from the welding surface 111 and the height of the second welding tooth 124 protruding from the welding surface 111 are too small, the first welding tooth 123 and the second welding tooth 124 cannot heat the target object to a sufficient temperature, resulting in a poor welding effect of the welding head structure 100 on the target object. Specifically, when the target object is a multi-layer tab, it may be difficult to weld the multi-layer tab together.

[0059] In some embodiments, the first welding tooth 123 has a second circumferential side wall 1231, and the included angle between the second circumferential side wall 1231 and the welding surface 111 is β, then the relational expression is satisfied: 0.9 ≤ α / β ≤ 1.1.

[0060] Optionally, in some embodiments, the included angle α between the first circumferential side wall 1241 and the welding surface 111 is greater than the included angle β between the second circumferential side wall 1231 and the welding surface 111; in other embodiments, the included angle α between the first circumferential side wall 1241 and the welding surface 111 is less than the included angle β between the second circumferential side wall 1231 and the welding surface 111.

[0061] Preferably, the included angle α between the first circumferential side wall 1241 and the welding surface 111 is equal to the included angle β between the second circumferential side wall 1231 and the welding surface 111.

[0062] In this embodiment, when the included angle α between the first circumferential side wall 1241 and the welding surface 111 and the included angle β between the second circumferential side wall 1231 and the welding surface 111 satisfy the relation: 0.9 ≤ α / β ≤ 1.1, the inclination degrees of the first circumferential side wall 1241 and the second circumferential side wall 1231 are within a reasonable range. Understandably, the inclination degrees of the first circumferential side wall 1241 and the second circumferential side wall 1231 are equal or close. When the welding tooth assembly 120 is disposed on the welding surface 111, it can ensure that the areas of the surfaces of the first welding tooth 123 facing away from the welding surface 111 and the second welding tooth 124 facing away from the welding surface 111 are within a reasonable range, so that the welding surface areas of the first welding tooth 123 and the second welding tooth 124 are relatively large. When the welding head structure 100 is used to weld a target object, it can make the target object have a relatively large welding mark, which is convenient for further processing of the target object and improves the service performance of the welding head structure 100. On the other hand, it can ensure that the side of the first welding tooth 123 close to the welding surface 111 and the side of the second welding tooth 124 close to the welding surface 111 are closely arranged, increasing the arrangement density of the first welding tooth 123 and the second welding tooth 124 disposed on the welding surface 111, so as to increase the welding area when the welding head structure 100 welds the target object.

[0063] Please refer to Figure 5 , optionally, the distance d1 between two adjacent first welding teeth 123 satisfies the range: 0.11 mm ≤ d1 ≤ 0.21 mm. The distance between two adjacent first welding teeth 123 is within a reasonable range, so that after the welding head structure 100 welds the target object and forms a welding mark on the target object, the area of the welding mark formed by the first welding tooth 123 on the target object is within a reasonable range, which is convenient for further processing of the target object.

[0064] Specifically, the distance d1 between two adjacent first welding teeth 123 may be, but is not limited to, 0.11 mm, 0.13 mm, 0.15 mm, 0.17 mm, 0.19 mm, 0.2 mm, 0.21 mm, etc.

[0065] Optionally, the distance d2 between two adjacent second welding teeth 124 satisfies the range: 0.69 mm ≤ d2 ≤ 0.99 mm. The distance between two adjacent second welding teeth 124 is within a reasonable range, so that after the welding head structure 100 welds the target object and forms a weld mark on the target object, the weld mark of the target object has a clear edge, and the area of ​​the weld mark formed by the second welding teeth 124 on the target object is within a reasonable range, which is convenient for further processing of the target object.

[0066] Specifically, the distance d2 between two adjacent second welding teeth 124 may be, but is not limited to, 0.69 mm, 0.75 mm, 0.78 mm, 0.8 mm, 0.82 mm, 0.85 mm, 0.89 mm, 0.9 mm, 0.92 mm, 0.94 mm, 0.96 mm, 0.97 mm, and 0.99 mm.

[0067] See also Figure 2 and Figure 5 In some embodiments, the first welding tooth 123 is a prism, and the second welding tooth 124 is a frustum.

[0068] In this embodiment, when the first welding tooth 123 is a prism, the shape of the surface of the first welding tooth 123 facing the welding surface 111 and the shape of the surface of the first welding tooth 123 away from the welding surface 111 are both rhombuses; when the second welding tooth 124 is a truncated cone, the shape of the surface of the second welding tooth 124 facing the welding surface 111 and the shape of the surface of the second welding tooth 124 away from the welding surface 111 are both circular. When the plurality of truncated cone-shaped second welding teeth 124 are arranged at intervals around the outer periphery of the first welding tooth group 121, compared with the prism-shaped first welding teeth 123, the edges of the truncated cone-shaped second welding teeth 124 are smoother, which can reduce the risk of cracking of the target object during the welding of the target object by the welding head structure 100, and improve the performance of the welding head structure 100.

[0069] In some embodiments, the surface of the first welding tooth 123 facing away from the welding surface 111 is rhombus-shaped and has a first diagonal line 1232 and a second diagonal line 1233. The first diagonal line 1232 of each first welding tooth 123 is along a first direction (eg Figure 2 The second diagonal line 1233 of each of the first welding teeth 123 extends along the second direction (as shown in the X direction). Figure 2extends in the Y direction as shown; in the first direction, the first diagonals 1232 of two adjacent first welding teeth 123 are staggeredly arranged; in the second direction, the second diagonals 1233 of two adjacent first welding teeth 123 are staggeredly arranged, wherein the first direction intersects with the second direction.

[0070] Optionally, in some embodiments, the first direction is perpendicular to the second direction.

[0071] It can be understood that the first diagonal 1232 and the second diagonal 1233 are perpendicular.

[0072] It can be understood that in the first direction, the adjacent first welding teeth 123 are staggeredly arranged, so in the first direction, at least one first welding tooth 123 is located between two adjacent first welding teeth 123; in the second direction, the adjacent first welding teeth 123 are staggeredly arranged, so in the second direction, at least one first welding tooth 123 is located between two adjacent first welding teeth 123.

[0073] In this embodiment, in the first direction, the first diagonals 1232 of two adjacent first welding teeth 123 are staggeredly arranged; in the second direction, the second diagonals 1233 of two adjacent first welding teeth 123 are staggeredly arranged, then the first diagonals 1232 of two adjacent first welding teeth 123 do not coincide; in the second direction, the second diagonals 1233 of two adjacent first welding teeth 123 do not coincide. The multiple first welding teeth 123 are closely arranged on the welding surface 111, and the gap between two adjacent first welding teeth 123 is small, so that when the welding head structure 100 is used to weld the target object, it is beneficial to increase the area of the welding mark, thereby facilitating the further processing of the target object and improving the use performance of the welding head structure 100.

[0074] When the first welding tooth 123 is a frustum of a pyramid, the side length of the surface of the first welding tooth 123 facing away from the welding surface 111 is d3, then d3 satisfies the range: 0.78mm ≤ d3 ≤ 1mm. The side length of the surface of the first welding tooth 123 facing away from the welding surface 111 is within a reasonable range, so that the first welding tooth 123 has a large contact area with the target object, improving the use performance of the welding head structure 100.

[0075] Specifically, the value of the side length d3 of the surface of the first welding tooth 123 facing away from the welding surface 111 can be but is not limited to 0.78mm, 0.79mm, 0.80mm, 0.82mm, 0.84mm, 0.86mm, 0.88mm, 0.9mm, 0.92mm, 0.95mm, 0.98mm and 1mm, etc.

[0076] When the first welding tooth 123 is a frustum, the side length of the surface of the first welding tooth 123 facing the welding surface 111 is d4, and d4 satisfies the range: 1 mm ≤ d4 ≤ 1.3 mm. The side length of the surface of the first welding tooth 123 facing the welding surface 111 is within a reasonable range, so that the first welding tooth 123 is closely arranged on the welding surface 111, improving the service performance of the welding head structure 100.

[0077] Specifically, the value of the side length d4 of the surface of the first welding tooth 123 facing the welding surface 111 can be, but is not limited to, 1 mm, 1.05 mm, 1.08 mm, 1.1 mm, 1.12 mm, 1.15 mm, 1.18 mm, 1.2 mm, 1.22 mm, 1.25 mm, 1.28 mm, 1.3 mm, etc.

[0078] Please refer to Figure 9 , this application provides a welding device 200, and the welding device 200 includes: a device body 210 and the welding head structure 100 provided by this application. The welding head structure 100 is arranged on the device body 210 to weld a target object.

[0079] It can be understood that the welding device 200 is an ultrasonic welding device 200.

[0080] In this embodiment, the welding head structure 100 is arranged on the device body 210, and the device body 210 converts electrical energy into high-frequency vibration energy to make the welding head structure 100 vibrate at a high frequency. When the welding device 200 welds a target object, the welding head structure 100 vibrates at a high frequency and frictions with the target object, so that the welding head structure 100 converts vibration energy into heat on the contact surface with the target object, causing the target object to melt. When the ultrasonic wave stops, the welding head structure 100 stops contacting and fricturing with the target object, and the melt of the target object forms a welding mark on the target object, so that the welding head structure 100 realizes the welding of the target object.

[0081] Optionally, the welding device 200 further includes a base for supporting the device body 210. The device body 210 includes an ultrasonic generator, a transducer, and an amplitude modulator. The ultrasonic generator, the transducer, and the amplitude modulator are electrically connected in sequence. Among them, the ultrasonic generator is used to convert electrical energy into high-frequency electrical energy, the transducer is used to convert high-frequency electrical energy into mechanical vibration energy, the amplitude modulator is used to transmit mechanical vibration energy and adjust the amplitude of the mechanical vibration energy, and the amplitude modulator is connected to the welding head structure 100 so that the welding head structure 100 vibrates and contacts and frictions with the target object, and finally realizes the welding of the target object.

[0082] In this application, the mention of "embodiment" or "implementation manner" means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of this application. The appearance of the phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in this application can be combined with other embodiments. In addition, it should also be understood that the features, structures or characteristics described in each embodiment of this application can be arbitrarily combined with each other without contradiction to form another embodiment that does not depart from the spirit and scope of the technical solution of this application.

[0083] Finally, it should be noted that the above implementation manners are only used to illustrate the technical solutions of this application and not to limit them. Although the technical solutions of this application have been described in detail with reference to the above preferred implementation manners, those of ordinary skill in the art should understand that modifications or equivalent replacements can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A welding head structure, characterized in that: The welding head structure comprises: A welding head body having a welding surface; and A welding tooth assembly, wherein the welding tooth assembly is arranged on the welding surface, the welding tooth assembly comprises a first welding tooth group and a second welding tooth group, the first welding tooth group comprises a plurality of first welding teeth arranged in an array; the second welding tooth group comprises a plurality of second welding teeth arranged at intervals, the plurality of second welding teeth are arranged at intervals around the outer periphery of the first welding tooth group, the second welding tooth has a first peripheral side wall, and the range of the angle α between the first peripheral side wall and the welding surface is: 45°≤α≤60°.

2. The welding head structure according to claim 1, characterized in that: An area of ​​a surface of the first welding tooth facing away from the welding surface is greater than or equal to an area of ​​a surface of the second welding tooth facing away from the welding surface.

3. The welding head structure according to claim 2, characterized in that: The surface of the first welding tooth away from the welding surface has an inscribed circle, the radius of the inscribed circle is r1, and the radius of the equivalent circle of the surface of the second welding tooth away from the welding surface is r2, then the relationship is satisfied: r2≤r1.

4. The welding head structure according to claim 1, characterized in that: The equivalent circle radius r2 of the surface of the second welding tooth away from the welding surface satisfies the range: 0.34mm≤r2≤0.5mm.

5. The welding head structure according to claim 1, characterized in that: The second welding tooth has a chamfer on a side facing away from the welding surface, and the radius r3 of the chamfer satisfies the range: 0.1mm≤r3≤0.2mm.

6. The welding head structure according to claim 1, characterized in that: A height h1 of the first welding tooth protruding from the welding surface satisfies the range of 0.15 mm ≤ h1 ≤ 0.2 mm, and a height h2 of the second welding tooth protruding from the welding surface satisfies the range of 0.15 mm ≤ h2 ≤ 0.2 mm.

7. The welding head structure according to claim 1, characterized in that: The first welding tooth has a second peripheral side wall, and the angle between the second peripheral side wall and the welding surface is β, which satisfies the relationship: 0.9≤α / β≤1.

1.

8. The welding head structure according to any one of claims 1 to 7, characterized in that: The first welding tooth is a prism, and the second welding tooth is a frustum.

9. The welding head structure according to claim 8, characterized in that: The surface of the first welding tooth away from the welding surface is rhombus-shaped and has a first diagonal and a second diagonal, the first diagonal of each of the first welding teeth extends along the first direction, and the second diagonal of each of the first welding teeth extends along the second direction; along the first direction, the first diagonals of two adjacent first welding teeth are staggered; along the second direction, the second diagonals of two adjacent first welding teeth are staggered, wherein the first direction intersects with the second direction.

10. A welding device, characterized in that: The welding device comprises: The device body; and The welding head structure according to any one of claims 1 to 9 is arranged on the device body to weld the target object.

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