Welder wave-free welding-bearing wheel and welding-bearing wheel seat

Abstract

The utility model discloses a welding machine wave-free bearing welding wheel and a bearing welding wheel seat, the welding machine wave-free bearing welding wheel is applied to the bearing welding wheel seat of an ultrasonic seam welder, the welding machine wave-free bearing welding wheel comprises a bearing welding wheel body, a bearing welding surface is arranged on the outer circumference of the bearing welding wheel body, and raised bearing welding lines are arranged on the bearing welding surface; wherein the welding lines comprise at least one of diamond-shaped lines, rectangular lines, conical lines, cylindrical lines, spherical lines and etched lines. According to the wave-free welding-bearing wheel of the welding machine, the protruding welding-bearing lines are arranged on the welding-bearing face, so that the problems that the number of metal scraps is large, the number of welding penetrating holes is large, and the welding efficiency is low are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery manufacturing, and particularly relates to a welding machine non-wave bearing welding wheel and a bearing welding wheel seat. Background Art

[0002] During the production process of lithium batteries, metal foils are usually selected as current collectors. Among them, aluminum foil is selected as the positive current collector, and copper foil is selected as the negative current collector. To improve the energy density and safety of the battery, a composite current collector obtained by compounding a polymer film and a metal coating has gradually attracted attention. However, since the composite current collector includes an insulating layer formed of a polymer material, the tab of the composite current collector cannot output the current in the battery cell to the electrode terminal. Therefore, it is necessary to use a foil (aluminum foil or copper foil) to transfer the tab of the composite current collector so as to output the current in the battery cell. To achieve the transfer of the foil (aluminum foil or copper foil) and the tab of the composite current collector, the tab needs to be connected by welding to meet the subsequent overcurrent requirements. With the development of lithium battery technology, the capacity and volume of lithium batteries are getting larger and larger, so there is a trend that the full-tab welding mark length is getting longer and longer.

[0003] In the related art, ultrasonic metal welding is a process between cold pressure welding and friction welding. Ultrasonic metal welding includes two welding methods: pressure welding and roll welding. In the traditional method of tab welding, the pressure welding process is mostly used. However, when welding the tabs of batteries with longer welding marks, under the premise of meeting the production beat, multiple ultrasonic welding machines need to be set at the positive and negative electrodes respectively, resulting in waste of resources and increased costs.

[0004] Therefore, in the current related art, roll welding is used for tab welding. The ultrasonic roll welding device is based on the rotation of the roll welding head driven by a motor and the vibration effect of ultrasonic waves to realize the welding of battery tabs.

[0005] However, due to the prior art, when an ultrasonic rolling welding machine with the publication number of CN108393573A uses roll welding to perform integral welding on battery tabs, the welding mark length is long, resulting in a large amount of metal debris, many welding perforations, and slow welding efficiency during the entire welding process. Summary of the Utility Model

[0006] In order to overcome the problems of a large amount of metal debris, many welding perforations, and slow welding efficiency when welding battery tabs in the prior art, the utility model provides a welding machine non-wave bearing welding wheel and a bearing welding wheel seat.

[0007] The technical solution of the utility model is as follows:

[0008] On the one hand, the utility model provides a welding machine non-wave bearing welding wheel, which is applied to a bearing welding wheel seat of an ultrasonic roll welding machine. The welding machine non-wave bearing welding wheel includes:

[0009] The welding support wheel body, a welding support surface is provided on the outer circumference of the welding support wheel body, and raised welding support lines are provided on the welding support surface;

[0010] Among them, the welding support lines include at least one of diamond-shaped lines, rectangular lines, conical lines, cylindrical lines, spherical lines and etched lines.

[0011] As an embodiment of the present invention, the welding support lines cover the welding support surface.

[0012] As an embodiment of the present invention, a plurality of the welding support lines are provided, and the plurality of welding support lines are evenly spaced on the welding support surface.

[0013] As an embodiment of the present invention, the plurality of welding support lines are of the same type of lines.

[0014] As an embodiment of the present invention, the plurality of welding support lines are respectively different types of lines.

[0015] As an embodiment of the present invention, a rotating shaft hole that cooperates with the rotating shaft of the welding support wheel seat is provided in the middle of the welding support wheel body.

[0016] As an embodiment of the present invention, a plurality of circumferentially evenly arranged mounting holes are provided on the welding support wheel body, and the mounting holes cooperate with the fixing members of the welding support wheel seat to fix the welding support wheel body on the rotating shaft of the welding support wheel seat.

[0017] As an embodiment of the present invention, the raised height of the welding support lines does not exceed 1 mm.

[0018] On the other hand, the present invention provides a welding support wheel seat, which is applied to an ultrasonic roll welding machine. The welding support wheel seat includes a rotating shaft support, a rotating shaft movably installed on the rotating shaft support, and a welding machine non-wave welding support wheel as described in any of the above embodiments installed on the rotating shaft.

[0019] As an embodiment of the present invention, an annular fixing member is sleeved on the rotating shaft, and the welding machine non-wave welding support wheel is fixed on the rotating shaft through the fixing member.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] The non-wave welding wheel of the welding machine provided by the utility model has raised welding lines on the welding surface of the welding wheel body. During the welding process in cooperation with the welding head, intermittent welding can be achieved. During the welding process, there is less metal debris, reducing the damage to the battery caused by the splashing of metal debris and having fewer welding perforations. During the intermittent welding process, it can effectively prevent the tearing of the root of the battery tab when the tab is folded, and effectively reduce the thickness of the welding mark after welding, improving the welding efficiency and welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is the front view of the non-wave welding wheel of the welding machine in Embodiment 1 of the present utility model;

[0024] Figure 2 It is the side view of the non-wave welding wheel of the welding machine in Embodiment 1 of the present utility model;

[0025] Figure 3 It is the side view of the non-wave welding wheel of the welding machine in Embodiment 2 of the present utility model;

[0026] Figure 4 It is the side view of the non-wave welding wheel of the welding machine in Embodiment 3 of the present utility model;

[0027] Figure 5 It is the side view of the non-wave welding wheel of the welding machine in Embodiment 4 of the present utility model;

[0028] Figure 6 It is the structural schematic diagram of the welding wheel seat in Embodiment 5 of the present utility model.

[0029] In the figure,

[0030] 1. Welding wheel body; 11. Welding surface; 12. Welding lines; 13. Rotating shaft hole; 14. Mounting hole; 2. Rotating shaft support; 3. Rotating shaft; 4. Fixing part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, it is stated that the embodiments described below are only used to explain the present utility model and are not used to limit the present utility model.

[0032] It should be noted that the terms "installation", "setting", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application. The meaning of "a plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] Please refer to Figure 1 、 Figure 2, this embodiment provides a non-wave welding wheel, which is applied to the welding wheel seat of an ultrasonic rolling welder. The welding wheel seat supports the welding part of the foil and the tab of the composite current collector through the non-wave welding wheel of the welder to cooperate with the welding wheel of the ultrasonic rolling welder for tab welding. The non-wave welding wheel of the welder includes a welding wheel body 1. A welding surface 11 is provided on the outer circumference of the welding wheel body 1, and raised welding patterns 12 are provided on the welding surface 11. The welding patterns 12 include at least one of diamond patterns, rectangular patterns, conical patterns, cylindrical patterns, spherical patterns, and etched patterns. Among them, the diamond pattern is composed of multiple diamond-shaped protrusions and is regularly distributed in a parallelogram in a certain area; the rectangular pattern is composed of multiple rectangular protrusions and is regularly distributed in a parallelogram in a certain area; the conical pattern is composed of multiple conical protrusions and is regularly distributed in a parallelogram in a certain area; the cylindrical pattern is composed of multiple cylindrical protrusions and is regularly distributed in a parallelogram in a certain area; the spherical pattern is composed of multiple spherical protrusions and is regularly distributed in a parallelogram in a certain area. The etched pattern is composed of multiple protrusions with irregular shapes and is irregularly distributed in a certain area. It should be noted that for the processing of the above various patterns, the pattern processing technology on the welding head of the ultrasonic rolling welder in the prior art can be used, such as grid pattern processing. Whether it is a diamond pattern, a rectangular pattern, a conical pattern, a cylindrical pattern, a spherical pattern, or an etched pattern, the size of the distribution area, the specific density of the pattern, and the arrangement direction of the pattern can be adjusted according to the requirements of actual product processing. No specific limitation is made in this embodiment, as long as it can meet the welding process requirements of products such as tabs.

[0034] Please refer to Figure 2 , in some specific embodiments, the welding pattern 12 adopts a diamond pattern.

[0035] Please refer to Figure 3 , in some specific embodiments, the welding pattern 12 adopts a rectangular pattern.

[0036] Please refer to Figure 4 , in some specific embodiments, the welding pattern 12 adopts a cylindrical pattern.

[0037] Please refer to Figure 5 , in some specific embodiments, the welding pattern 12 adopts a spherical pattern.

[0038] In some specific embodiments, the welding pattern 12 adopts a conical pattern.

[0039] In some specific embodiments, the welding pattern 12 adopts an etched pattern.

[0040] In some specific embodiments, the welding pattern 12 adopts a diamond pattern, a conical pattern, and a spherical pattern.

[0041] In some specific embodiments, the soldering lines 12 are rectangular lines, cylindrical lines, and etched lines.

[0042] The utility model provides a raised welding groove 12 on the welding surface 11 of the welding wheel body 1, and can realize intermittent welding in the welding process of the welding head (ultrasonic welding is performed only when the welding groove 12 contacts the battery ear and the corresponding area of ​​the battery ear is pressed against the welding groove 12 under the action of the welding head). There are few metal debris in the welding process, which reduces the damage to the battery caused by the splash of metal debris and reduces the welding perforation. In the intermittent welding process, the tearing of the root of the battery ear is effectively prevented when the ear is folded, and the thickness of the weld mark after welding is effectively reduced, thereby improving the welding efficiency and welding quality.

[0043] See also Figures 2 to 5 In one embodiment, the welding pattern 12 covers the entire welding surface 11 of the welding wheel. The welding pattern 12 can be at least one of diamond pattern, rectangular pattern, conical pattern, cylindrical pattern, spherical pattern and etched pattern. There is no specific limitation in this embodiment, as long as the welding process requirements of products such as tabs can be met.

[0044] In one embodiment, a plurality of welding lines 12 are provided, and the plurality of welding lines 12 are evenly spaced on the welding surface 11. The plurality of welding lines 12 may be the same line or different lines, and there is no specific limitation in this embodiment, as long as the welding process requirements of products such as tabs can be met.

[0045] During welding, due to the presence of gaps between the multiple welding lines 12, a gap area is formed. Since the height of the gap area is lower than the height of the area with the welding lines 12, when the welding wheel body 1 rotates to the gap area, the battery tab will not be pressed by the welding head, so the battery tab will not be welded in the gap area, thereby forming a gap segmented welding on the tab.

[0046] See also Figure 1 In one embodiment, a rotating shaft hole 13 matching with the rotating shaft 3 of the welding wheel seat is provided in the middle of the welding wheel body 1. By providing the rotating shaft hole 13, the welding wheel body 1 can be sleeved on the rotating shaft 3 of the welding wheel seat to complete the fixing of the welding wheel body 1.

[0047] See also Figure 1 , Figure 6, in one embodiment, a plurality of mounting holes 14 are circumferentially and uniformly arranged on the welding wheel body 1. The mounting holes 14 cooperate with the fixing member 4 of the welding wheel seat to fix the welding wheel body 1 on the rotating shaft 3 of the welding wheel seat. By fixing the welding wheel body 1 on the rotating shaft 3 of the welding wheel seat by means of the cooperation between the mounting holes 14 and the fixing member 4, the welding wheel body 1 can be firmly fixed on the rotating shaft 3 of the welding wheel seat, making the non-wave welding wheel of the welding machine more stable and reliable during operation.

[0048] In one embodiment, the protruding height of the welding texture 12 does not exceed 1 mm. By setting the protruding height of the welding texture 12 not to exceed 1 mm, the impact and friction on the foil and the composite current collector tab during the welding process can be reduced, thereby reducing the damage to the foil and the composite current collector tab; when the tab is folded, it can better adapt to the shape and size of the tab, reduce stress concentration, and effectively prevent the tearing of the root of the battery tab.

[0049] Please refer to Figure 6 , in one embodiment, the present utility model further provides a welding wheel seat applied to an ultrasonic welding machine. The welding wheel seat includes a rotating shaft support 2, a rotating shaft 3 movably installed on the rotating shaft support 2, and a non-wave welding wheel of the welding machine as described in any of the above embodiments installed on the rotating shaft 3. Specifically, when the welding wheel seat is applied to an ultrasonic welding machine, it is installed directly below the welding head of the ultrasonic welding machine, and the welding surface 11 of the non-wave welding wheel of the welding machine faces the welding surface of the welding head. This design can ensure that the position of the welding wheel and the welding head is relatively fixed, reduce the error caused by position deviation, and improve the welding accuracy and stability. Since the non-wave welding wheel of the welding machine is installed on the rotating shaft 3, during welding, the non-wave welding wheel of the welding machine will rotate synchronously with the rotating shaft 3. This design can ensure that the rotation speed of the welding wheel during the welding process matches the movement of the welding head, thus better adapting to the welding requirements and improving the welding efficiency and quality.

[0050] Please refer to Figure 6 , in one embodiment, an annular fixing member 4 is sleeved on the rotating shaft 3, and the non-wave welding wheel of the welding machine is fixed on the rotating shaft 3 through the fixing member 4 to realize the assembly of the non-wave welding wheel of the welding machine and the rotating shaft 3. Specifically, a plurality of mounting holes 14 are circumferentially and uniformly arranged on the welding wheel body 1. The mounting holes 14 cooperate with the fixing member 4 of the welding wheel seat to fix the welding wheel body 1 on the rotating shaft 3 of the welding wheel seat. By fixing the welding wheel body 1 on the rotating shaft 3 of the welding wheel seat by means of the cooperation between the mounting holes 14 and the fixing member 4, the welding wheel body 1 can be firmly fixed on the rotating shaft 3 of the welding wheel seat, making the non-wave welding wheel of the welding machine more stable and reliable during operation.

[0051] In other embodiments, the non-wave welding wheel of the welding machine can also be integrally designed with the rotating shaft 3.

[0052] It should be understood that those of ordinary skill in the art can make improvements or modifications based on the above description, and all such improvements and modifications shall fall within the protection scope of the appended claims of this utility model.

[0053] The above has described the patent of this utility model by way of example in conjunction with the accompanying drawings. Obviously, the implementation of the patent of this utility model is not limited by the above-mentioned manner. As long as various improvements are made by adopting the method concept and technical solution of the patent of this utility model, or the concept and technical solution of the patent of this utility model are directly applied to other occasions without improvement, they are all within the protection scope of this utility model.

Claims

1. A wave-free welding wheel for a welding machine, characterized in that: Applied to the welding wheel seat of the ultrasonic seam welding machine, the welding machine non-wave welding wheel comprises: A welding wheel body, wherein a welding surface is arranged on the outer circumference of the welding wheel body, and a raised welding pattern is arranged on the welding surface; Wherein, the welding pattern includes at least one of a diamond pattern, a rectangular pattern, a conical pattern, a cylindrical pattern and a spherical pattern; A rotating shaft hole matched with the rotating shaft of the welding wheel seat is arranged in the middle of the welding wheel body, and a plurality of mounting holes evenly arranged in the circumferential direction are arranged on the welding wheel body, and the mounting holes are matched with the fixing parts of the welding wheel seat to fix the welding wheel body on the rotating shaft of the welding wheel seat; The protrusion height of the welding pattern does not exceed 1mm.

2. The wave-free welding wheel for welding machine according to claim 1, characterized in that: The welding lines are all over the welding surface.

3. The wave-free welding wheel for welding machine according to claim 1, characterized in that: A plurality of the welding lines are provided, and the plurality of welding lines are evenly spaced and arranged on the welding surface.

4. The wave-bearing welding wheel for welding machine according to claim 3, characterized in that: The plurality of welding lines are of the same kind.

5. The wave-bearing welding wheel for welding machine according to claim 3, characterized in that: The plurality of welding lines are respectively different lines.

6. A welding wheel seat, characterized in that: Applied to an ultrasonic seam welding machine, the welding wheel seat comprises a rotating shaft support, a rotating shaft movably mounted on the rotating shaft support, and a welding machine waveless welding wheel as described in any one of claims 1 to 5 mounted on the rotating shaft.

7. The welding wheel seat according to claim 6, characterized in that: An annular fixing piece is sleeved on the rotating shaft, and the wave-bearing welding wheel of the welding machine is fixed on the rotating shaft through the fixing piece.

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