Ultrasonic welding device

Abstract

The utility model discloses an ultrasonic welding device, and relates to the technical field of ultrasonic welding. Comprising a negative electrode welding seat which is installed on a welding machine and used for placing a to-be-welded tab and a to-be-welded pole piece; the left end and the right end of the negative electrode welding head are connected with the welding machine, the negative electrode welding head is provided with a plurality of welding faces in the circumferential direction, each welding face is provided with a welding spot set, the welding spot sets are located over the pole pieces, and welding of the pole pieces and the pole pieces is completed through contact between the welding spot sets and the pole pieces. According to the ultrasonic welding device, a pole piece and a pole lug are welded through the welding spot set on the negative electrode welding head, when the welding spot set is seriously abraded and needs to be replaced, the negative electrode welding head is rotated, the welding spot set on the other welding face is made to be located above the negative electrode welding base, the pole piece and the pole lug are welded, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to ultrasonic welding technical field more particularly relates to a kind of ultrasonic welding devices. BACKGROUND

[0002] At present, battery plays an important role in new energy vehicles, and the pole tab needs to be welded in the production process. Ultrasonic welding is to use high-frequency vibration wave to transmit to the surface of two objects to be welded, and under pressure, the surface of two objects is rubbed to form the fusion between molecular layers. Ultrasonic technology is widely used in plastic welding, metal welding and other processing fields.

[0003] During the production process of negative electrode sheet, the nickel tab and copper foil are welded using ultrasonic waves, which reduces the service life of the negative electrode welding head and requires frequent replacement of the welding head, affecting the production efficiency of the equipment and increasing the maintenance cost of the equipment. UTILITY MODEL CONTENT

[0004] Therefore, the utility model provides an ultrasonic welding device to improve the service life of the welding head and reduce the maintenance cost.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides an ultrasonic welding device, which is connected with an ultrasonic welding machine and used for welding a pole tab and a pole piece, and comprises:

[0007] A negative electrode welding seat is installed on the welding machine and used for placing the pole tab and the pole piece to be welded.

[0008] A negative electrode welding head is connected with the welding machine at its left and right ends, and is provided with a plurality of welding surfaces in the circumferential direction. Each welding surface is provided with a welding point group, and the welding point group is located directly above the pole piece and contacts the pole tab to complete the welding of the pole tab and the pole piece.

[0009] Further, each welding point group comprises three welding points.

[0010] Further, each welding surface is provided with two welding point groups, and the distance from the two welding point groups to the center of the welding surface is the same.

[0011] Further, the left and right ends of the negative electrode welding head are rotationally connected with the welding machine.

[0012] Further, the negative electrode welding seat comprises a plurality of welding surfaces, and the plurality of welding surfaces are distributed in the circumferential direction of the negative electrode welding seat.

[0013] Compared with the prior art, the ultrasonic welding device provided by the utility model discloses a kind of, pole piece and pole lug are placed in negative electrode welding seat in turn, and pole piece and pole lug are welded by the welding point group on negative electrode welding head, when welding point group needs to be replaced when wearing seriously, negative electrode welding head is disassembled, negative electrode welding head is rotated, and negative electrode welding head is reinstalled, and welding point group on another welding surface is located above negative electrode welding seat and is welded to pole piece and pole lug, reduce maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0015] Figure 1 The structure diagram of the ultrasonic welding device provided by the utility model is shown in the figure.

[0016] Figure 2 The structure diagram of the negative electrode welding head provided by the utility model is shown in the figure.

[0017] Figure 3 The sectional view of the ultrasonic welding device provided by the utility model is shown in the figure.

[0018] Figure 4 The structure diagram of the negative electrode welding seat provided by the utility model is shown in the figure.

[0019] In the figure: 1, negative electrode welding head; 2, negative electrode welding seat; 3, welding point; 4, welding surface; 5, welding surface; 6, pole lug; 7, pole piece. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] Referring to Figures 1-4 The utility model embodiment discloses an ultrasonic welding device, connect with ultrasonic welding machine, be used for the welding of pole lug 6 and pole piece 7, it includes:

[0022] Negative electrode welding seat 2, negative electrode welding seat 2 is installed on welding machine, for placing the pole lug 6 and pole piece 7 to be welded;

[0023] The negative electrode welding head 1 is connected with the welding machine at both ends, and a plurality of welding surfaces 4 are arranged on the negative electrode welding head 1 in the circumferential direction. Each welding surface 4 is provided with a welding point group, and the welding point group is located directly above the pole piece 7. The welding point group is in contact with the pole lug to complete the welding of the pole lug 6 and the pole piece 7.

[0024] The pole piece 7 and the pole lug 6 are placed on the negative electrode welding seat 2 in turn, and the pole piece 7 and the pole lug 6 are welded by the welding point group on the negative electrode welding head 1.

[0025] In some embodiments, two welding surfaces 4 are arranged on each negative electrode welding head 1, and the two welding surfaces 4 are arranged oppositely.

[0026] When the welding point group on one welding surface 4 needs to be replaced due to serious damage, the negative electrode welding seat 2 is disassembled, the negative electrode welding head 1 is rotated, another welding surface 4 on the negative electrode welding head 1 is replaced above the negative electrode welding seat 2, and the negative electrode welding head 1 is installed, thereby completing the replacement of the negative electrode welding head 1 and reducing the maintenance cost.

[0027] In some embodiments, each welding point group includes three welding points 3.

[0028] In some embodiments, two welding point groups are arranged on each welding surface 4, and the distance from the two welding point groups to the center of the welding surface 4 is the same.

[0029] Two welding point groups are arranged on each welding surface 4. When one welding point group needs to be replaced due to serious wear, the negative electrode welding head 1 is adjusted left and right so that another welding point group on the welding surface 4 is located above the pole lug 6, and the welding of the pole lug 6 and the pole piece 7 is continued. Each welding surface 4 can have two welding groups to weld the pole lug 6 and the pole piece 7, thereby prolonging the service life of the negative electrode welding head 1, ensuring sufficient welding residue, meeting the large-current charging and discharging requirements of the battery cell, and reducing the equipment maintenance cost.

[0030] When both welding point groups on one welding surface 4 are seriously worn, the negative electrode welding head 1 is rotated, and the welding surface 4 used in the welding process is replaced, so that one welding point group on another welding surface 4 welds the pole lug 6 and the pole piece 4.

[0031] In some embodiments, the left and right ends of the negative electrode welding head 1 are rotationally connected with the welding machine.

[0032] In some embodiments, the negative electrode welding seat 2 includes a plurality of welding surfaces 5, and the plurality of welding surfaces 5 are distributed along the circumference of the negative electrode welding seat 2.

[0033] In some embodiments, four welding surfaces 5 are arranged on each negative electrode welding seat 2.

[0034] In some embodiments, four supporting surfaces are arranged on each welding surface 5.

[0035] When one support surface of a welding surface 5 is severely worn, the left-right or front-back position of the negative electrode welding seat 2 is adjusted, and the electrode 7 and electrode tab 6 are placed on another support surface of this welding surface 5. When all four support surfaces on the same welding surface 5 are severely worn, the negative electrode welding head 1 is rotated to replace the new welding surface 5 for operation, thus reducing maintenance costs.

[0036] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0037] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An ultrasonic welding apparatus, connected to an ultrasonic welding machine, for welding electrode tabs and electrode sheets, characterized in that, include: A negative electrode welding socket, which is mounted on the welding machine, is used to hold the electrode tabs and electrode sheets to be welded; The negative electrode welding head is connected to the welding machine at both its left and right ends. The negative electrode welding head has multiple welding surfaces arranged circumferentially. Each welding surface has a group of welding points, which are located directly above the electrode sheet. The welding points contact the electrode tab to complete the welding between the electrode tab and the electrode sheet.

2. The ultrasonic welding apparatus according to claim 1, characterized in that, Each of the aforementioned solder joint groups comprises three solder joints.

3. The ultrasonic welding apparatus according to claim 1, characterized in that, Two sets of weld points are provided on each welding surface, and the two sets of weld points are equidistant from the center of the welding surface.

4. The ultrasonic welding apparatus according to claim 1, characterized in that, The left and right ends of the negative electrode welding head are rotatably connected to the welding machine.

5. The ultrasonic welding apparatus according to claim 1, characterized in that, The negative electrode welding socket includes multiple welding surfaces, which are distributed circumferentially along the negative electrode welding socket.

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