Cylindrical battery positive tab ultrasonic welding positioning assembly and ultrasonic welding device

Abstract

The utility model provides a cylindrical battery positive tab ultrasonic welding positioning assembly and an ultrasonic welding device. The cylindrical battery positive tab ultrasonic welding positioning assembly comprises a base, a welding seat and a profiling positioning support. The welding seat is arranged on the base, a positioning groove is formed in the welding seat and faces a welding head of the ultrasonic welding machine, a laminated welding area is arranged in the positioning groove, and the positioning groove is used for limiting and guiding one end of a positive tab on the cap to the laminated welding area; the profiling positioning support is arranged at the side part of the base, the profiling positioning support is provided with a limiting groove, the limiting groove is matched with the cylindrical battery shell, the cylindrical battery shell is arranged in the limiting groove, and one end of a positive tab on a battery cell in the cylindrical battery shell is arranged in the positioning groove and extends to the laminated welding area; wherein one end of the positive tab on the cap and one end of the positive tab on the battery cell are partially overlapped in the laminated welding area.

Description

Technical Field

[0001] This utility model relates to the field of cylindrical battery tab welding technology, and in particular to an ultrasonic welding positioning component and ultrasonic welding device for the positive tab of a cylindrical battery. Background Technology

[0002] A cylindrical battery mainly consists of a casing, a cap, a cell, and positive and negative tabs. The negative tab is usually welded to the bottom of the casing, while the positive tab is mainly divided into two parts: one part connects to the cell, and the other part connects to the cap.

[0003] Among them, such as Figure 1 As shown, the positive tabs of the two parts are usually manually ultrasonically welded using an existing ultrasonic welding machine. The specific operation method is as follows: the production personnel manually support the cylindrical battery casing and cap, so that one end of the positive tab on the cell and one end of the positive tab on the cap overlap on the welding station, which is the welding station of the ultrasonic welding machine. At this time, the welding head is controlled to move towards the welding station, and ultrasonic frequency mechanical vibration energy is applied to the two positive tabs, so that the welding part can achieve ultrasonic solid-state welding in a non-melting state.

[0004] However, in the actual operation of the above-mentioned ultrasonic welding method, the positive tab on the cell and the positive tab on the cap are usually overlapped by the production personnel based on their work experience or welding skills. That is, the positive tabs of the two parts of the welding part are manually pre-positioned. This makes it easy for the welding part to be misaligned at the moment of welding due to the production personnel's lack of concentration or hand tremors. This can lead to problems such as weak positive tab welding, short circuit or affecting the subsequent performance of the battery.

[0005] Therefore, there is an urgent need for a device that can effectively prevent the positive electrode tab from shifting during ultrasonic welding. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide an ultrasonic welding positioning component and ultrasonic welding device for the positive electrode tab of a cylindrical battery that can better prevent welding misalignment of the positive electrode tab during the welding process.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] An ultrasonic welding and positioning assembly for the positive electrode tab of a cylindrical battery includes:

[0009] Base;

[0010] A welding seat is arranged on the base, the welding seat is provided with a positioning groove, the positioning groove is arranged towards the welding head of the ultrasonic welding machine, and a laminated welding area is arranged in the positioning groove. The positioning groove is used to limit and guide one end of the positive electrode lug on the cap to the laminated welding area.

[0011] A profiled positioning support is arranged on the side of the base, the profiled positioning support is provided with a limiting groove, the limiting groove is matched with the cylindrical battery shell, the cylindrical battery shell is arranged in the limiting groove, one end of the positive electrode lug on the battery cell in the cylindrical battery shell is arranged in the positioning groove, and extends to the laminated welding area.

[0012] Wherein, one end of the positive electrode lug on the cap and one end of the positive electrode lug on the battery cell partially overlap in the laminated welding area.

[0013] In one embodiment, the width of the positioning groove is greater than the width of the positive electrode lug on the cap and the width of the positive electrode lug on the battery cell.

[0014] In one embodiment, the difference between the width of the positioning groove and the width of the positive electrode lug on the cap is 0.2mm-0.5mm; the difference between the width of the positioning groove and the width of the positive electrode lug on the battery cell is 0.2mm-0.5mm.

[0015] In one embodiment, the laminated welding area is arranged in alignment with the welding head of the ultrasonic welding machine, and the laminated welding area is located directly below the welding head of the ultrasonic welding machine.

[0016] In one embodiment, the base comprises a bottom plate and a mounting block arranged in a stack; the mounting block is provided with a mounting groove, the welding seat is arranged in the mounting groove, the bottom plate is arranged on the welding platform at the front end of the ultrasonic welding machine, and the bottom plate is movably connected with the welding platform.

[0017] In one embodiment, the welding seat and the mounting groove are clearance fitted.

[0018] In one embodiment, the mounting groove penetrates through both sides of the base; and / or,

[0019] The edge of the slot of the positioning groove is formed with a guide slope; and / or,

[0020] The depth of the positioning groove is 0.5mm-1mm.

[0021] In one embodiment, the mounting block is further provided with a through hole, the through hole is in communication with the mounting groove, and the through hole is used to place a fastening pin.

[0022] In one of the embodiments, the profiling positioning support is detachably connected with the mounting block.

[0023] An ultrasonic welding device comprises the cylindrical battery positive lug ultrasonic welding positioning assembly of any of the above embodiments.

[0024] Compared with the prior art, the utility model has at least the following advantages:

[0025] The cylindrical battery shell is placed in the limiting groove, and one end of the positive lug on the battery core extends to the laminated welding area, that is, the cylindrical battery shell is positioned and placed through the limiting groove, preferably replacing the manual holding mode of the cylindrical battery shell, thereby avoiding the shaking of the cylindrical battery shell. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0027] Figure 1 It is a physical map of the ultrasonic welding machine in the prior art.

[0028] Figure 2 It is a structural schematic view of the cylindrical battery positive lug ultrasonic welding positioning assembly in one embodiment.

[0029] Figure 3 It is a structural schematic view of the cylindrical battery positive lug ultrasonic welding positioning assembly. Figure 2 It is a partial enlarged view of position A of the cylindrical battery positive lug ultrasonic welding positioning assembly.

[0030] Figure 4 It is a partial structural explosion schematic view of the cylindrical battery positive lug ultrasonic welding positioning assembly. Figure 2 It is a structural schematic view of the cylindrical battery positive lug ultrasonic welding positioning assembly.

[0031] Figure 5 It is a structural schematic view of the cylindrical battery positive lug ultrasonic welding positioning assembly. Figure 2 It is a structural schematic view of the cylindrical battery positive lug ultrasonic welding positioning assembly.

[0032] Reference signs: cylindrical battery positive lug ultrasonic welding positioning assembly 10; cylindrical battery positive lug ultrasonic welding positioning assembly 10; base 100; bottom plate 110; mounting block 120; mounting groove 1201; through hole 1202; welding seat 200; positioning groove 201; laminated welding area 202; guide inclined surface 210; ultrasonic welding machine 300; cap 400; profiling positioning support 500; limiting groove 501; cylindrical battery shell 600. DETAILED DESCRIPTION

[0033] For the purpose of facilitating the understanding of the present application, a more complete understanding of the present application can be had by reference to the following description and accompanying drawings. In the drawings, a preferred embodiment of the present application is depicted. It is to be understood that the present application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It is intended that the present application be considered as encompassing all such aspects of the present application.

[0034] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein, the terms "vertical", "horizontal", "left", "right" and the like are merely used for the purpose of illustration and are not intended to limit the present application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0036] The present disclosure provides a cylindrical battery positive lug ultrasonic welding positioning assembly, comprising a base, a welding seat and a profiling positioning support. The welding seat is arranged on the base, the welding seat is provided with a positioning groove, the positioning groove is arranged towards the welding head of an ultrasonic welding machine, and a laminated welding area is arranged in the positioning groove. The positioning groove is used to limit and guide one end of the positive lug on the cap to the laminated welding area. The profiling positioning support is arranged on the side of the base, the profiling positioning support is provided with a limiting groove, the limiting groove is matched with a cylindrical battery shell, and the cylindrical battery shell is arranged in the limiting groove. One end of the positive lug on the cylindrical battery shell is arranged in the positioning groove and extends to the laminated welding area. One end of the positive lug on the cap and one end of the positive lug on the cylindrical battery shell partially overlap in the laminated welding area.

[0037] Please refer toFigures 2 to 5 In order to better understand the cylindrical battery positive tab ultrasonic welding positioning assembly 10 of the present application, the cylindrical battery positive tab ultrasonic welding positioning assembly 10 is further explained as follows:

[0038] The cylindrical battery positive tab ultrasonic welding positioning assembly 10 of an embodiment includes a base 100, a welding seat 200, and a profiling positioning support 500. The welding seat 200 is arranged on the base 100, the welding seat 200 is provided with a positioning groove 201, the positioning groove 201 is arranged towards the welding head of an ultrasonic welding machine 300, and the positioning groove 201 is provided with a laminated welding area 202, the positioning groove 201 is used to limit and guide one end of the positive tab on the cap 400 to the laminated welding area 202; the profiling positioning support 500 is arranged on the side of the base 100, the profiling positioning support 500 is provided with a limiting groove 501, the limiting groove 501 is matched with the cylindrical battery shell 600, the cylindrical battery shell 600 is arranged in the limiting groove 501, so that one end of the positive tab on the battery cell in the cylindrical battery shell 600 is arranged in the positioning groove 201 and extends to the laminated welding area 202; wherein one end of the positive tab on the cap 400 and one end of the positive tab on the battery cell partially overlap in the laminated welding area 202.

[0039] In this embodiment, the cylindrical battery shell 600 is placed in the limiting groove 501, and one end of the positive tab on the battery cell extends to the laminated welding area 202, that is, the cylindrical battery shell 600 is positioned and placed by the limiting groove 501, which better replaces the manual holding method of the cylindrical battery shell 600, thereby avoiding the shaking of the cylindrical battery shell 600; at the same time, the production personnel only need to manually guide one end of the positive tab on the cap 400 to the laminated welding area 202 through the positioning groove 201, so that one end of the positive tab on the cap 400 and one end of the positive tab on the battery cell can be limited in displacement by the positioning groove 201, and then the two parts of the positive tab are partially overlapped, which can better prevent the welding position of the positive tab from being offset during welding, and avoid the problems of loose welding of the positive tab, short circuit, or affecting the subsequent battery performance.

[0040] As Figure 2 and Figure 3As shown in the drawings, in one of the embodiments, the width of the positioning groove 201 is greater than the width of the positive electrode tab on the cap 400 and the width of the positive electrode tab on the battery cell. In this way, the production personnel can place one end of the positive electrode tab on the battery cell in the cylindrical battery shell 600 and one end of the positive electrode tab on the cap 400 in the positioning groove 201, respectively, and position and limit the two parts of the positive electrode tab through the positioning groove 201, and make the two parts overlap to form a predetermined position of the welding part of the positive electrode tab, so as to wait for the welding head of the ultrasonic welding machine 300 to ultrasonically weld the welding part of the positive electrode tab.

[0041] It should be noted that in the present embodiment, the working principle of the ultrasonic welding machine 300 is prior art, which will not be described here.

[0042] As shown in the drawings, Figure 2 and Figure 3 in one of the embodiments, the difference between the width of the positioning groove 201 and the width of the positive electrode tab on the cap 400 is 0.2-0.5 mm; the difference between the width of the positioning groove 201 and the width of the positive electrode tab on the battery cell is 0.2-0.5 mm. In this way, by selecting a suitable width difference, the smoothness of placing the positive electrode tab in the positioning groove 201 can be improved, and at the same time, the situation of excessive relative displacement of the two parts of the positive electrode tab can be avoided, thereby ensuring the welding quality of the positive electrode tab; in the present embodiment, the difference between the width of the positioning groove 201 and the width of the positive electrode tab on the cap 400 and the difference between the width of the positioning groove 201 and the width of the positive electrode tab on the battery cell are both 0.3 mm.

[0043] As shown in the drawings, Figure 2 and Figure 3 in one of the embodiments, the laminated welding area 202 is arranged in alignment with the welding head of the ultrasonic welding machine 300, and the laminated welding area 202 is located directly below the welding head of the ultrasonic welding machine 300. In this way, the welding head of the ultrasonic welding machine 300 can quickly ultrasonically weld the overlapping part of one end of the positive electrode tab on the cap 400 and one end of the positive electrode tab on the battery cell, i.e. the welding part of the positive electrode tab.

[0044] As shown in the drawings, Figures 2 to 5 in one of the embodiments, the base 100 comprises a bottom plate 110 and a mounting block 120 arranged in a stack; the mounting block 120 is provided with a mounting groove 1201, and the welding seat 200 is arranged in the mounting groove 1201; the bottom plate 110 is arranged on a welding platform at the front end of the ultrasonic welding machine 300, and the bottom plate 110 is movably connected with the welding platform.

[0045] It can be understood that, due to the frequent contact and friction between the welding seat 200 and the welding head of the ultrasonic welding machine 300 during the welding process, the welding seat 200 needs to be made of a material with high hardness and wear resistance, while the mounting block 120 only needs to be made of a general material. Therefore, the mounting block 120 and the welding seat 200 are combined and spliced to place the welding seat 200 in the mounting groove 1201.

[0046] In this embodiment, the bottom plate 110 can be adjusted in the horizontal position on the welding platform, thereby driving the mounting block 120 and the welding seat 200 on the bottom plate 110 to move relative to the welding head of the ultrasonic welding machine 300. When the bottom plate 110 moves to the predetermined position, the bottom plate 110 is locked and positioned on the welding platform by the fastening screw.

[0047] As shown in Figure 4 and Figure 5 , in one embodiment, the welding seat 200 is in clearance fit with the mounting groove 1201. In this way, production personnel can easily disassemble the welding seat 200 with more wear.

[0048] As shown in Figure 4 and Figure 5 , in one embodiment, the mounting groove 1201 penetrates through both sides of the base 100.

[0049] As shown in Figure 3 , in one embodiment, the edge of the slot opening of the positioning slot 201 is formed with a guide slope 210. In this way, the guide slope 210 improves the convenience and smoothness of positioning and placing the two parts of the positive electrode lug in the positioning slot 201.

[0050] As shown in Figure 3 , in one embodiment, the depth of the positioning slot 201 is 0.5mm-1mm. It can be understood that, in this embodiment, the depth of the positioning slot 201 is 0.5mm.

[0051] As shown in Figure 4 and Figure 5 , in one embodiment, the mounting block 120 is also provided with a through hole 1202, which is in communication with the mounting groove 1201, and the through hole 1202 is used to place a fastening pin.

[0052] It can be understood that, by penetrating the fastening pin in the through hole 1202, the welding seat 200 in the mounting groove 1201 can be clamped and fastened, thereby preventing the welding seat 200 from loosening, and also facilitating the disassembly and assembly of the welding seat 200.

[0053] As shown in Figure 4As shown, in one of the embodiments, the profiling positioning support 500 is detachably connected with the mounting block 120.

[0054] The application also provides an ultrasonic welding device comprising the cylindrical battery positive lug ultrasonic welding positioning assembly 10 of any of the above embodiments.

[0055] In the embodiment, the ultrasonic welding device applies the cylindrical battery positive lug ultrasonic welding positioning assembly, which can better prevent the welding deviation of the positive lug welding position during the welding process, avoid the problems of the unfirm welding of the positive lug, short circuit or influence on the subsequent battery performance, and effectively ensure the quality of the ultrasonic welding of the positive lug.

[0056] Compared with the prior art, the utility model has at least the following advantages:

[0057] The cylindrical battery shell is placed in the limiting groove, and one end of the positive lug on the battery core extends to the laminated welding area, that is, the cylindrical battery shell is positioned and placed by the limiting groove, which better replaces the manual manual holding mode of the cylindrical battery shell, thereby avoiding the shaking of the cylindrical battery shell.

[0058] The above embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A cylindrical battery positive tab ultrasonic welding positioning assembly, characterized by, It comprises: a base; a welding seat provided on the base, the welding seat is provided with a positioning groove, the positioning groove is arranged towards the welding head of the ultrasonic welding machine, and a laminated welding area is arranged in the positioning groove, the positioning groove is used for limiting and guiding one end of the positive lug on the cap to the laminated welding area; a profiling positioning support provided on the side of the base, the profiling positioning support is provided with a limiting groove, the limiting groove is matched with the cylindrical battery shell, the cylindrical battery shell is arranged in the limiting groove, one end of the positive lug on the battery cell in the cylindrical battery shell is arranged in the positioning groove, and extends to the laminated welding area; wherein one end of the positive lug on the cap and one end of the positive lug on the battery cell partially overlap in the laminated welding area.

2. The cylindrical battery positive tab ultrasonic welding positioning assembly of claim 1, wherein, The width of the positioning groove is greater than the width of the positive lug on the cap and the width of the positive lug on the battery cell.

3. The cylindrical battery positive tab ultrasonic welding positioning assembly of claim 2, wherein, The difference between the width of the positioning groove and the width of the positive lug on the cap is 0.2mm-0.5mm; the difference between the width of the positioning groove and the width of the positive lug on the battery cell is 0.2mm-0.5mm.

4. The cylindrical battery positive tab ultrasonic welding positioning assembly of claim 1, wherein, The laminated welding area is arranged in alignment with the welding head of the ultrasonic welding machine, and the laminated welding area is located directly below the welding head of the ultrasonic welding machine.

5. The cylindrical battery positive tab ultrasonic welding positioning assembly of claim 1, wherein, The base comprises a bottom plate and a mounting block arranged in a stack; the mounting block is provided with a mounting groove, the welding seat is arranged in the mounting groove, the bottom plate is arranged on the welding platform at the front end of the ultrasonic welding machine, and the bottom plate is movably connected with the welding platform.

6. The cylindrical battery positive tab ultrasonic welding positioning assembly of claim 5, wherein, The welding seat and the mounting groove are gap fitted.

7. The cylindrical battery positive tab ultrasonic welding positioning assembly of claim 6, wherein, The mounting groove penetrates through both sides of the base; and / or, The groove edge of the positioning groove is formed with a guide inclined surface; and / or, The depth of the positioning groove is 0.5mm-1mm.

8. The cylindrical battery positive tab ultrasonic welding positioning assembly of claim 7, wherein, The mounting block is also provided with a through hole, the through hole is in communication with the mounting groove, and the through hole is used for placing a fastening pin.

9. The cylindrical battery positive tab ultrasonic welding positioning assembly of claim 5, wherein, The profiling positioning support is detachably connected with the mounting block.

10. An ultrasonic welding device characterized by comprising: It comprises the cylindrical battery positive lug ultrasonic welding positioning assembly of any one of claims 1-9.

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