Welding head device for relay welding

Abstract

The present invention discloses a welding head device for relay welding. The welding head device for relay welding comprises a first welding mechanism and a second welding mechanism. The first welding mechanism comprises a first welding head body, a first welding tooth base base, and a first welding tooth assembly. A plurality of first welding tooth base bases are provided on the first welding head body, and a first welding tooth assembly is connected to some of the first welding tooth base bases. The second welding mechanism comprises a second welding head body, a second welding tooth base base, and a second welding tooth assembly. A plurality of second welding tooth base bases are provided on the second welding head body, and a second welding tooth assembly is connected to some of the second welding tooth base bases. When in use, the second welding head body is provided opposite to the first welding head body, and a plurality of second welding tooth assemblies on the second welding tooth base base are distributed with a displacement from a plurality of first welding tooth assemblies on the first welding tooth base base. The above-mentioned welding head device for relay welding can effectively solve the phenomenon that the welding head is welded during the welding process and can improve the welding bonding force and welding efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and in particular, to a welding head device for relay welding.

Background Art

[0002] When welding a welding workpiece such as a composite current collector, since the heat resistance of the composite current collector is low, a relay welding method is adopted in the prior art, that is, a layer of conventional foil material is placed between the composite current collectors and used as a relay body. Relay welding is performed by an ultrasonic welding device that vibrates the atoms of the adjacent composite current collector and the relay body by high-frequency vibration to weld the composite current collector and the relay body together. In order to increase the frictional force between the welding head and the material and ensure that the welding head can move the material to vibrate at high frequency, there are a plurality of welding teeth such as spherical teeth and conical teeth on the working surface that presses the material of the welding head.

[0003] The conventional relay welding method has the following deficiencies. The first is that there is a phenomenon that the welding head is welded during the welding process, metal chips are generated, which easily causes internal short circuits and affects the safety performance of the battery. The second is that there are problems with the shape of the welding teeth of the welding head. For example, the periphery of the spherical teeth is smooth and prone to slipping, and the conical teeth are prone to piercing the welding workpiece such as a composite current collector, but are prone to causing perforation on the surface layer of the welding workpiece, resulting in poor welding quality. The third is that the flow of the relay welding operation is relatively complicated and affects the welding efficiency.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Based on this, regarding the phenomenon in conventional relay welding where metal chips are generated, the welding head is prone to being welded, the welding teeth of the welding head are prone to slipping and easily piercing into the welding workpiece, and the process flow of relay welding is relatively complex and affects the welding efficiency, an embodiment of the present invention provides a welding head device for relay welding. The welding head device for relay welding of the present invention can effectively solve the phenomenon that the welding head is welded during the welding process and can improve the welding bonding force and welding efficiency between the relay body and the composite current collector.

Means for Solving the Problem

[0005] It includes a first welding head body, a first welding tooth base base, and a first welding tooth assembly. Several of the first welding tooth base bases are provided on the first welding head body, and the first welding tooth assembly is connected to some of the first welding tooth base bases. The first welding tooth assembly includes a first welding mechanism with several first welding tooth heads. It includes a second welding head body, a second welding tooth base base, and a second welding tooth assembly. Several of the second welding tooth base bases are provided on the second welding head body, and the second welding tooth assembly is connected to some of the second welding tooth base bases. The second welding tooth assembly includes a second welding mechanism with several second welding tooth heads. When in the use state, the second welding head body is provided opposite to the first welding head body, and a plurality of the second welding tooth assemblies on the second welding tooth base base are distributed with a displacement relative to a plurality of the first welding tooth assemblies on the first welding tooth base base. It is a welding head device for relay welding.

[0006] In some of its embodiments, on one side of the first welding head body for mating with the second welding head body, there is a first welding mating surface where several of the first welding tooth base bases are provided.

[0007] In some of these embodiments, on one side of the second welding head body for mating with the first welding head body, there is a second welding joint surface where several of the second welding tooth base bases are provided.

[0008] In some of these embodiments, the plurality of first welding tooth heads are distributed in a matrix pattern on the first welding tooth base base, and / or the plurality of second welding tooth heads are distributed in a matrix pattern on the second welding tooth base base.

[0009] In some of these embodiments, the first welding tooth head has an anti-welding coating, and / or the second welding tooth head has an anti-welding coating.

[0010] In some of these embodiments, the material of the anti-welding coating is an Al-Cu-Fe quasi-crystalline coating, and / or the thickness of the anti-welding coating is 5 μm to 30 μm, and / or the anti-welding coating is manufactured by a method of physical spraying, vapor phase growth or ion plating.

[0011] In some of these embodiments, the height of the first welding tooth base base relative to the first welding head body is greater than or equal to the height of the first welding tooth head relative to the first welding tooth base base, and / or the height of the second welding tooth base base relative to the second welding head body is greater than or equal to the height of the second welding tooth head relative to the second welding tooth base base.

[0012] In some of these embodiments, the plurality of first welding tooth base bases are distributed in a matrix pattern on the first welding head body, and / or the plurality of second welding tooth base bases are distributed in a matrix pattern on the second welding head body.

[0013] In some of these embodiments, the first welding tooth base is in the form of one or more of a polygonal frustum, a conical frustum, a hemisphere, and an arc body. And / or, the second welding tooth base is in the form of one or more of a polygonal frustum, a conical frustum, a hemisphere, and an arc body.

[0014] In some of these embodiments, the welding head device for the relay welding is connected to the first welding head body and / or the second welding head body, and further includes a driving mechanism used to drive the first welding head body and the second welding head body to approach or separate from each other.

Advantages of the Invention

[0015] The above-mentioned welding head device for relay welding can effectively solve the phenomenon that the welding head is welded during the welding process, and can improve the welding bonding force and welding efficiency between the relay body and the composite current collector. When in use, the above-mentioned welding head device for relay welding uses a conventional foil material on each of both sides of the composite current collector as a relay body. The relay welding is performed by an ultrasonic welding device, which vibrates the atoms of the adjacent composite current collector and the relay body with high-frequency vibration to weld the metal foils of the composite current collector and the relay body together. That is, the welding process adopts a method in which the first welding head body and the second welding head body perform welding synchronously, improving the welding efficiency, avoiding the use of the lower die in the prior art, and canceling the steps of accurately positioning and firmly and stably installing the lower die in the prior art, further improving the welding efficiency.

Brief Description of the Drawings

[0016] To more clearly illustrate the technical aspects in the embodiments of the present application, the drawings required for use in the following description of the embodiments will be briefly introduced below. The drawings in the following description are only some embodiments of the present application, and it is obvious that those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0017] To more fully understand the present application and its beneficial effects, the following will be described with reference to the drawings. Here, the same reference numerals in the following description represent the same parts.

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Explanation of Reference Numerals

[0019] 10... Relay welding head device, 100... First welding mechanism, 101... First welding head body, 102... First welding tooth base base, 103... First welding tooth assembly, 1031... First welding tooth head, 200... Second welding mechanism, 201... Second welding head body, 202... Second welding tooth base base, 203... Second welding tooth assembly, 2031... Second welding tooth head, 20... Composite current collector, 21... Relay body.

Embodiments for Carrying Out the Invention

[0020] To make the above objects, features, and advantages of the present invention more clearly and easily understood, the following will describe in detail the specific embodiments of the present invention with reference to the drawings. In the following description, many specific details are described to enable a full understanding of the present invention. However, the present invention can be implemented in many other forms different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific examples disclosed below.

[0021] In the description of the present invention, the orientation or positional relationship indicated by terms such as "center", "longitudinal direction", "lateral direction", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction", "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for facilitating the description of the present invention and simplifying the description, and does not indicate or imply that such a device or element must have a specific orientation and be configured and operated in a specific orientation. It is necessary to understand that it cannot be understood as limiting the present invention.

[0022] Also, the terms "first" and "second" are merely for the purpose of explanation and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the technical features being referred to. Thus, the features limited by "first" and "second" can explicitly or implicitly include at least one of such features. In the description of the present invention, unless otherwise clearly and specifically limited, the meaning of "a plurality" is at least two, for example, two, three, etc.

[0023] In the present invention, unless otherwise clearly defined and limited, terms such as "attach", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or a relationship of internal communication between two elements or the interaction between two elements. A person skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation.

[0024] In the present invention, unless otherwise clearly defined and limited, for the first feature to be "above" or "below" the second feature, it may mean that the first feature and the second feature are in direct contact, or the first feature and the second feature are indirectly in contact through an intermediate medium. Further, for the first feature to be "above", "upward" and "upper surface" of the second feature, it may mean that the first feature is directly above and obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. For the first feature to be "below", "downward" and "lower surface" of the second feature, it may mean that the first feature is directly below and obliquely below the second feature, or simply indicates that the horizontal height of the first feature is smaller than that of the second feature.

[0025] In addition, when an element is said to be "fixed to" or "provided on" another element, it may be directly on the other element, or there may be intervening elements. When an element is considered to be "connected to" another element, it may be directly connected to the other element, or intervening elements may also be present at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this document are for illustrative purposes only and do not represent the only embodiment.

[0026] In the description of the present invention, the meaning of "several" is one or more, the meaning of "a plurality" is two or more, greater than a certain number, less than a certain number, exceeding a certain number, etc. are understood not to include that number, and greater than or equal to a certain number, less than or equal to a certain number, within a certain number, etc. are understood to include that number. When described as "first", "second", etc., they are only for distinguishing technical features and cannot be understood as indicating or implying relative importance, implicitly indicating the quantity of the indicated technical features, or implicitly indicating the context of the indicated technical features.

[0027] Unless otherwise defined, all technical and scientific terms used in this document have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. In this document, the terms used in the specification of the present invention are only for explaining specific embodiments and are not intended to limit the present invention. The term "and / or" used in this document includes any and all combinations of one or more of the related listed items.

[0028] The embodiment of the present application provides a welding head device 10 for relay welding to solve the problems that metal chips are generated in conventional relay welding, the welding head is likely to be welded, the welding teeth of the welding head are likely to slip and easily pierce into the welding work, and the process of relay welding operation is relatively complicated and affects the welding efficiency. The following will be described with reference to the drawings.

[0029] Regarding the welding head device 10 for relay welding according to an embodiment of the present application, for example, referring to FIG. 1, FIG. 1 is a schematic structural diagram of the welding head device 10 for relay welding according to an embodiment of the present application. The welding head device 10 for relay welding according to the present application can be used for welding the composite current collector 20.

[0030] To more clearly explain the structure of the welding head device 10 for relay welding, the welding head device 10 for relay welding will be introduced below with reference to the drawings.

[0031] For example, referring to FIG. 1, FIG. 1 is a schematic structural diagram of the welding head device 10 for relay welding according to an embodiment of the present application. The welding head device 10 for relay welding includes a first welding mechanism 100 and a second welding mechanism 200.

[0032] The first welding mechanism 100 includes a first welding head body 101, a first welding tooth base base 102, and a first welding tooth assembly 103. Several first welding tooth base bases 102 are provided on the first welding head body 101. The first welding tooth assembly 103 is connected to some of the first welding tooth base bases 102. The first welding tooth assembly 103 includes several first welding tooth heads 1031.

[0033] The second welding mechanism 200 includes a second welding head body 201, a second welding tooth base base 202, and a second welding tooth assembly 203. Several second welding tooth base bases 202 are provided on the second welding head body 201. The second welding tooth assembly 203 is connected to some of the second welding tooth base bases 202. The second welding tooth assembly 203 includes several second welding tooth heads 2031.

[0034] When in use, the second welding head body 201 is provided opposite to the first welding head body 101, and a plurality of second welding tooth assembly 203 on the second welding tooth base base 202 are distributed with a displacement relative to a plurality of first welding tooth assembly 103 on the first welding tooth base base 102. When distributed with a displacement, when the second welding head body 201 abuts against the first welding head body 101, the second welding tooth base base 202 having the second welding tooth assembly 203 cooperates with the first welding tooth base base 102 lacking the first welding tooth assembly 103, and the second welding tooth base base 202 lacking the second welding tooth assembly 203 cooperates with the first welding tooth base base 102 having the first welding tooth assembly 103. In this way, when the second welding head body 201 and the first welding head body 101 cooperate to process the composite current collector 20, it can be ensured that there are either the second welding tooth assembly 203 or the first welding tooth assembly 103 between the second welding tooth base base 202 facing the first welding tooth base base 102 in each group. The design of distributed with a displacement can not only avoid the damage of the welding tooth head that may be caused by ultrasonic resonance, but also increase the welding strength by the meshing action with each other. Also, the upper and lower welding heads of the first welding tooth base base 102 and the opposing second welding tooth base base 202 can not only perform the action of ultrasonic welding, but also support each other.

[0035] The welding head device 10 of the above-mentioned relay welding can effectively solve the phenomenon that the welding head is welded during the welding process, and can improve the welding bonding force and welding efficiency between the relay body 21 and the composite current collector 20. When in use, the welding head device 10 of the above-mentioned relay welding uses a conventional foil material of one layer on each of the two sides of the composite current collector 20 as the relay body 21. The relay welding uses an ultrasonic welding device to vibrate the atoms of the adjacent composite current collector and the relay body by high-frequency vibration, so as to weld the metal foils of the composite current collector 20 and the relay body 21 together. That is, the welding process adopts a method in which the first welding head body 101 and the second welding head body 201 perform welding synchronously, improves the welding efficiency, avoids the use of the lower die in the prior art, and cancels the steps that need to accurately position and firmly and stably install the lower die in the prior art, further improving the welding efficiency.

[0036] In some of these embodiments, on one side of the first welding head body 101 for mating with the second welding head body 201, there is a first welding mating surface. A plurality of first welding tooth base bases 102 are provided on the first welding mating surface.

[0037] In some of these embodiments, on one side of the second welding head body 201 for mating with the first welding head body 101, there is a second welding mating surface. A plurality of second welding tooth base bases 202 are provided on the second welding mating surface. During processing, the first welding mating surface and the second welding mating surface are provided parallel to each other.

[0038] In some of these embodiments, a plurality of first welding tooth heads 1031 are distributed in a matrix on the first welding tooth base base 102. For example, in one specific example, referring to what is shown in FIG. 6, a plurality of first welding tooth heads 1031 are distributed in 3 rows and 3 columns on the first welding tooth base base 102. It is not difficult to understand that in other specific examples, the number of rows and columns in which the plurality of first welding tooth heads 1031 are distributed in a matrix on the first welding tooth base base 102 may not be equal.

[0039] In some of these embodiments, a plurality of second welding tooth heads 2031 are distributed in a matrix pattern on the second welding tooth base base 202. For example, in one specific example, referring to that shown in FIG. 6, the plurality of second welding tooth heads 2031 are distributed in a 3-row and 3-column pattern on the second welding tooth base base 202. In other specific examples, it is not difficult to understand that the number of rows and columns in which the plurality of second welding tooth heads 2031 are distributed in a matrix pattern on the second welding tooth base base 202 may not be equal.

[0040] In some of these embodiments, the first welding tooth head 1031 has an anti-welding coating. The anti-welding coating effectively solves the phenomenon that the welding head is welded during the welding process, and also improves the welding bonding force and welding efficiency between the relay body 21 and the composite current collector 20.

[0041] In some of these embodiments, the second welding tooth head 2031 has an anti-welding coating. The anti-welding coating effectively solves the phenomenon that the welding head is welded during the welding process, and also improves the welding bonding force and welding efficiency between the relay body 21 and the composite current collector 20.

[0042] In some of these embodiments, the material of the anti-welding coating is an Al-Cu-Fe quasicrystalline coating.

[0043] In some of these embodiments, the thickness of the anti-welding coating is 5 μm to 30 μm. For example, in one specific example, the thickness of the anti-welding coating is 5 μm. In another specific example, the thickness of the anti-welding coating is 30 μm. In other examples, it is not difficult to understand that the thickness of the anti-welding coating may be 6 μm, 8 μm, 9 μm, 10 μm, 12 μm, 15 μm, 16 μm, 18 μm, 19 μm, 20 μm, 22 μm, 25 μm, 26 μm, 28 μm, 29 μm or other parameters.

[0044] In some of these embodiments, the anti-welding coating is produced by physical spraying, vapor deposition, or ion plating methods.

[0045] In some of these embodiments, the height of the first welding tooth base 102 relative to the first welding head body 101 is greater than or equal to the height of the first welding tooth head 1031 relative to the first welding tooth base 102.

[0046] In some of these embodiments, the height of the second welding tooth base 202 relative to the second welding head body 201 is greater than or equal to the height of the second welding tooth head 2031 relative to the second welding tooth base 202.

[0047] In some of these embodiments, the plurality of first welding tooth bases 102 are distributed in a matrix on the first welding head body 101. In one specific example, referring to what is shown in FIGS. 2 and 3, the plurality of first welding tooth bases 102 are distributed in 3 rows and 7 columns on the first welding head body 101. In this case, for the 7 first welding tooth bases 102 in each row, the first welding tooth heads 1031 are distributed at intervals. Preferably, referring to what is shown in FIG. 3, the first welding tooth heads 1031 are distributed on the first welding tooth bases 102 located at the 2nd, 4th, and 6th column positions in the first row, the first welding tooth heads 1031 are distributed on the first welding tooth bases 102 located at the 1st, 3rd, 5th, and 7th column positions in the second row, and the first welding tooth heads 1031 are distributed on the first welding tooth bases 102 located at the 2nd, 4th, and 6th column positions in the third row.

[0048] In some of these embodiments, a plurality of second welding tooth base bases 202 are distributed in a matrix on the second welding head body 201. In one specific example, referring to what is shown in FIGS. 4 and 5, the plurality of second welding tooth base bases 202 are distributed in 3 rows and 7 columns on the second welding head body 201. Preferably, referring to what is shown in FIG. 5, the second welding tooth heads 2031 are distributed on the second welding tooth base bases 202 located at the positions of the 1st, 3rd, 5th, and 7th columns in the first row, the second welding tooth heads 2031 are distributed on the second welding tooth base bases 202 located at the positions of the 2nd, 4th, and 6th columns in the second row, and the second welding tooth heads 2031 are distributed on the second welding tooth base bases 202 located at the positions of the 1st, 3rd, 5th, and 7th columns in the third row.

[0049] In some of these embodiments, the first welding tooth base base 102 exhibits one or more of a polygonal frustum, a conical frustum, a hemispherical body, and an arcuate body.

[0050] In some of these embodiments, the second welding tooth base base 202 exhibits one or more of a polygonal frustum, a conical frustum, a hemispherical body, and an arcuate body.

[0051] In some of these embodiments, the first welding tooth head 1031 exhibits a spherical shape, a hemispherical shape, an ellipsoidal shape, a semi-ellipsoidal shape, or other structures, and the orthographic projection of the first welding tooth head 1031 on the first welding tooth base base 102 presents a circular shape. The second welding tooth head 2031 exhibits a spherical shape, a hemispherical shape, an ellipsoidal shape, a semi-ellipsoidal shape, or other structures, and the orthographic projection of the second welding tooth head 2031 on the first welding tooth base base 102 presents a circular shape.

[0052] For example, in one specific example, the first welding tooth base base 102 presents a frustum of a square pyramid, a plurality of first welding tooth heads 1031 in the first welding tooth base base 102 present hemispheres, and a plurality of first welding tooth heads 1031 in the first welding tooth base base 102 are evenly distributed in a 3-row and 3-column pattern. Referring to what is shown in FIG. 7, the height h1 of the first welding tooth base base 102 is greater than or equal to the diameter R1 of the first welding tooth head 1031, and the included angle α1 between the side surface and the bottom surface of the first welding tooth base base 102 is 45° to 75°. Referring to what is shown in FIG. 6, the spacing distance d1 between adjacent first welding tooth heads 1031 in each row is equal to the spacing distance d1 between adjacent first welding tooth heads 1031 in each column, provided that d1 is smaller than R1. R1 is smaller than the side length L1 of the top surface of the first welding tooth base base 102. Furthermore, R1 is smaller than 1 / 2L1. Correspondingly, the second welding tooth base base 202 presents a frustum of a square pyramid, a plurality of second welding tooth heads 2031 in the second welding tooth base base 202 present hemispheres, and a plurality of second welding tooth heads 2031 in the second welding tooth base base 202 are evenly distributed in a 3-row and 3-column pattern. The diameter R2 of the second welding tooth head 2031 is equal to R1, the height h2 of the second welding tooth base base 202 is equal to h1, and the included angle α2 between the side surface and the bottom surface of the second welding tooth base base 202 is equal to α1. The spacing distance d2 between adjacent second welding tooth heads 2031 in each row is equal to d1. The side length L2 of the top surface of the second welding tooth base base 202 is equal to L1. That is, the second welding head body 201 and the first welding head body 101 are substantially the same in shape and size, but are different in that a plurality of second welding tooth assemblies 203 in the second welding tooth base base 202 are distributed with a displacement from a plurality of first welding tooth assemblies 103 in the first welding tooth base base 102.

[0053] For example, in one specific example, when the first welding tooth base 102 presents a triangular frustum, a hemisphere, or an arc-shaped body, the diameter of the circle of the perpendicular orthographic projection of the first welding tooth head 1031 on the first welding tooth base 102 is smaller than 1 / 2 times the value of the axis of symmetry of the perpendicular orthographic projection plane of the first welding head body 101 of the first welding tooth base 102. Correspondingly, the second welding head body 201 and the first welding head body 101 are substantially the same in shape and size, but are different in that the plurality of second welding tooth assemblies 203 on the second welding tooth base 202 are distributed with a displacement from the plurality of first welding tooth assemblies 103 on the first welding tooth base 102.

[0054] In some of these embodiments, the welding head device 10 for relay welding further includes a drive mechanism. The drive mechanism is connected to the first welding head body 101 and / or the second welding head body 201. The drive mechanism is used to drive the first welding head body 101 and the second welding head body 201 to approach or separate from each other. Preferably, the drive mechanism is connected to the first welding head body 101 located above, the second welding head body 201 is fixed, and the drive mechanism drives the first welding head body 101 to move, realizing the approach or separation of the first welding head body 101 from the second welding head body 201.

Embodiment

[0055] This embodiment employs the above-described welding head device 10 for relay welding to weld the composite copper current collector.

[0056] In this embodiment, the polymer base material of the composite current collector 20 is polyethylene terephthalate (PET), the relay body 21 is a 6-μm copper foil, ultrasonic welding is performed by the above-described welding head device 10 for relay welding, and the welding head device 10 for relay welding is as shown in FIG. 1.

[0057] Referring to what is shown in FIGS. 1 and 3, the first welding tooth base base 102 located at the positions of the 2nd, 4th, and 6th columns in the first row has the first welding tooth heads 1031 distributed thereon. The first welding tooth base base 102 located at the positions of the 1st, 3rd, 5th, and 7th columns in the second row has the first welding tooth heads 1031 distributed thereon. The first welding tooth base base 102 located at the positions of the 2nd, 4th, and 6th columns in the third row has the first welding tooth heads 1031 distributed thereon. Referring to what is shown in FIG. 5, the second welding tooth base base 202 located at the positions of the 1st, 3rd, 5th, and 7th columns in the first row has the second welding tooth heads 2031 distributed thereon. The second welding tooth base base 202 located at the positions of the 2nd, 4th, and 6th columns in the second row has the second welding tooth heads 2031 distributed thereon. The second welding tooth base base 202 located at the positions of the 1st, 3rd, 5th, and 7th columns in the third row has the second welding tooth heads 2031 distributed thereon.

[0058] The first welding tooth base base 102 presents a frustum of a square pyramid, and the included angle α1 between the side surface and the bottom surface of the first welding tooth base base 102 is 60°. The plurality of first welding tooth heads 1031 on the first welding tooth base base 102 present hemispheres, and the plurality of first welding tooth heads 1031 on the first welding tooth base base 102 are evenly distributed in a 3-row and 3-column pattern. The contact surface of the first welding tooth head 1031 is an Al-Cu-Fe quasi-crystalline coating with a thickness of 10 μm applied by a spraying method. Referring to what is shown in FIG. 7, the height h1 of the first welding tooth base base 102 is not less than the diameter R1 of the first welding tooth head 1031. Referring to what is shown in FIG. 6, the spacing distance d1 between adjacent first welding tooth heads 1031 in each row is equal to the spacing distance d1 between adjacent first welding tooth heads 1031 in each column, provided that d1 is smaller than R1. R1 is smaller than the side length L1 of the top surface of the first welding tooth base base 102. Furthermore, R1 is equal to 0.2L1.

[0059] Correspondingly, the second welding tooth base 202 presents a frustum of a square pyramid, a plurality of second welding tooth heads 2031 on the second welding tooth base 202 present hemispheres, and a plurality of second welding tooth heads 2031 on the second welding tooth base 202 are distributed at equal intervals in three rows and three columns. The diameter R2 of the second welding tooth head 2031 is equal to R1, the height h2 of the second welding tooth base 202 is equal to h1, and the included angle α2 between the side surface and the bottom surface of the second welding tooth base 202 is equal to α1. The distance d2 between adjacent second welding tooth heads 2031 in each row is equal to d1. The side length L2 of the top surface of the second welding tooth base 202 is equal to L1. That is, the second welding head body 201 and the first welding head body 101 are substantially the same in shape and size, but are different in that a plurality of second welding tooth assemblies 203 on the second welding tooth base 202 are distributed with a displacement from a plurality of first welding tooth assemblies 103 on the first welding tooth base 102.

[0060] During welding, the welding energy is 38 J, the welding amplitude is 28 μm, and the welding pressure is 20 PSI. Driven by the driving mechanism, the first welding head body 101 is driven to move, realizing the approach of the first welding head body 101 to the second welding head body 201 to complete the relay welding of the composite copper current collector, and there is no welding phenomenon in the welding process. In the test of the product after welding in this embodiment, the maximum T-shaped peel load is 260 N. Compared with the maximum T-shaped peel load of 200 N of the comparative sample under the same welding conditions by the conventional welding machine, it is shown that the welding head device 10 for relay welding of the present invention can effectively improve the welding bonding force of the composite current collector 20 and increase the welding efficiency.

Embodiment

[0061] This embodiment employs a welding head device 10 for relay welding to weld a composite aluminum current collector.

[0062] In this embodiment, the polymer base material of the composite current collector 20 is selected as polyethylene terephthalate (PET), the relay body 21 is a 12-μm aluminum foil, and ultrasonic welding is performed by the welding head device 10 for relay welding described above. The welding head device 10 for relay welding is substantially the same as the welding head device 10 for relay welding in Embodiment 1, but is different in that the first welding tooth base base 102 presents a quadrangular frustum, and the included angle α1 between the side surface and the bottom surface of the first welding tooth base base 102 is 55°. R1 is equal to 0.25L1.

[0063] During welding, the welding energy is 40 J, the welding amplitude is 30 μm, and the welding pressure is 20 PSI. The driving mechanism drives the first welding head body 101 to move, realizes the approach of the first welding head body 101 to the second welding head body 201, and completes the relay welding of the composite copper current collector. There is no welding phenomenon during the welding process. In the test of the product after welding in this embodiment, the maximum T-shaped peeling load is 270 N. Compared with the maximum T-shaped peeling load of the comparative sample under the same welding conditions by a conventional welding machine being 245 N, it is shown that the welding head device 10 for relay welding of the present invention can effectively improve the welding bonding force of the composite current collector 20 and increase the welding efficiency.

[0064] In the above embodiments, the descriptions of each embodiment focus on their respective points. For parts not detailed in a certain embodiment, reference can be made to the related descriptions of other embodiments.

[0065] The technical features of each of the above-described embodiments can be arbitrarily combined. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as these technical feature combinations do not conflict, they should be regarded as within the scope described in this specification.

[0066] The embodiments described above merely illustrate some embodiments of the present invention, and although the description is specific and detailed, it cannot be understood as limiting the scope of the patent of the present invention. It should be noted that those skilled in the art can make some further modifications and improvements on the premise of not departing from the concept of the present invention, and all of these belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be in accordance with the appended claims.

Claims

1. A first welding head body, a first welding tooth base base, and a first welding tooth assembly, wherein several of the first welding tooth base bases are provided on the first welding head body, and the first welding tooth assembly is connected to some of the first welding tooth base bases, and the first welding tooth assembly includes a first welding mechanism with several first welding tooth heads; A second welding head body, a second welding tooth base base, and a second welding tooth assembly, wherein several of the second welding tooth base bases are provided on the second welding head body, and the second welding tooth assembly is connected to some of the second welding tooth base bases, and the second welding tooth assembly includes a second welding mechanism with several second welding tooth heads; When in use, the second welding head body is provided opposite to the first welding head body, and a plurality of the second welding tooth assemblies on the second welding tooth base base are distributed with a displacement from a plurality of the first welding tooth assemblies on the first welding tooth base base. A welding head device for relay welding, characterized in that.

2. On one side of the first welding head body for mating with the second welding head body, there is a first welding mating surface where several of the first welding tooth base bases are provided. The welding head device for relay welding according to claim 1, characterized in that.

3. On one side of the second welding head body for mating with the first welding head body, there is a second welding mating surface where several of the second welding tooth base bases are provided. The welding head device for relay welding according to claim 1, characterized in that.

4. The plurality of the first welding tooth heads are distributed in a matrix on the first welding tooth base base, And / or, the plurality of the second welding tooth heads are distributed in a matrix on the second welding tooth base base. The welding head device for relay welding according to any one of claims 1 to 3, characterized in that.

5. The first welding tooth head has an anti-welding coating, And / or, the second welding tooth head has an anti-welding coating. The welding head device for relay welding according to any one of claims 1 to 3, characterized in that.

6. The material of the anti-welding coating is an Al-Cu-Fe quasicrystal coating, And / or, the thickness of the anti-welding coating is 5 μm to 30 μm. and / or, the anti-welding coating is manufactured by a physical spraying, vapor deposition or ion plating method, The welding head device for relay welding according to claim 5, characterized in that.

7. The height of the first welding tooth base with respect to the first welding head body is equal to or greater than the height of the first welding tooth with respect to the first welding tooth base of the first welding head, and / or, the height of the second welding tooth base with respect to the second welding head body is equal to or greater than the height of the second welding tooth with respect to the second welding tooth base of the second welding head, The welding head device for relay welding according to any one of claims 1 to 3 and 6, characterized in that.

8. A plurality of the first welding tooth bases are distributed in a matrix on the first welding head body, and / or, a plurality of the second welding tooth bases are distributed in a matrix on the second welding head body, The welding head device for relay welding according to any one of claims 1 to 3 and 6, characterized in that.

9. The first welding tooth base exhibits one or more of a frustum of a pyramid, a frustum of a cone, a hemisphere and an arc-shaped body, and / or, the second welding tooth base exhibits one or more of a frustum of a pyramid, a frustum of a cone, a hemisphere and an arc-shaped body, The welding head device for relay welding according to any one of claims 1 to 3 and 6, characterized in that.

10. Further comprising a drive mechanism connected to the first welding head body and / or the second welding head body and used to drive the first welding head body and the second welding head body to approach or separate from each other, The welding head device for relay welding according to claim 9, characterized in that.

Images