An ultrasonic welding auxiliary device

Abstract

The utility model discloses an ultrasonic welding auxiliary equipment, including welding equipment body and set up in the pressing mechanism of welding equipment body inboard, the pressing mechanism includes the pressing plate, and the pressing plate is established with the limited groove to one side of pole piece contact, the pressing plate is used to carry out the pressing of pole piece, when the pressing plate and pole piece contact, the tab of waiting to weld is located in the limited groove to carry out the limitation of both sides of tab. Make the tab keep stable in the welding process, can avoid the situation that pole piece foil appears wrinkle break, also can prevent the positive and negative pole material on pole piece and appear and fall off, can guarantee the quality of tab welding.

Description

Technical Field

[0001] This utility model relates to the field of electrode welding technology, specifically to an ultrasonic welding auxiliary device. Background Technology

[0002] Tabs are an important component of lithium-ion polymer batteries, primarily used to connect the positive and negative electrodes from the cell, forming contact points during charging and discharging. Tabs are composed of a metal strip and a film; the positive electrode metal strip is typically made of aluminum, while the negative electrode metal strip is made of nickel or nickel-plated copper. Ultrasonic welding uses high-frequency vibration waves to apply energy to the surface of the object to be welded. While pressure is applied, these high-frequency vibration waves cause friction on the surface, promoting fusion between molecular layers. It is widely used in welding thyristor leads, fuse elements, electrical leads, and tabs.

[0003] A battery cell tab ultrasonic welding mechanism, disclosed in CN108453363A, includes a lower mold support seat mounted on the upper part of an adjusting support base, with an ultrasonic welding bottom mold mounted in the middle of the upper part of the lower mold support seat. A set of electrode roller assemblies are respectively arranged on the left and right sides of the ultrasonic welding bottom mold on the upper part of the lower mold support seat. A welding adjustment mechanism is located above the lower mold support seat. The welding adjustment mechanism includes an ultrasonic welding head, an ultrasonic welding head seat for fixing the ultrasonic welding head, a welding head connecting plate for fixing the ultrasonic welding head seat, and a welding head driving device mounted on the upper part of the welding head connecting plate. The welding head driving device includes a welding head driving cylinder and a support seat for fixing the welding head driving cylinder. The piston rod of the welding head driving cylinder passes through the support seat, and the lower end of the piston rod is connected to the welding head connecting plate. This invention is used for ultrasonic welding of lithium battery cell tabs, automatically welding the cell tabs onto the electrode sheets using an ultrasonic metal welding machine.

[0004] The existing technology has the following shortcomings: When welding the tabs, the ultrasonic vibration of the existing ultrasonic welding equipment can easily cause the electrode foil to wrinkle and break. At the same time, it can easily cause the positive and negative electrode materials on the electrode to fall off, which not only affects the quality of the welding of the tabs and electrode sheets, but also affects the performance and safety of the battery. Utility Model Content

[0005] The purpose of this invention is to provide an ultrasonic welding auxiliary device. By setting a pressure plate, the electrode tabs and electrode sheets during the welding process can be pressed and constrained, so that the electrode tabs remain stable during the welding process. This can prevent the electrode foil from wrinkling and breaking, and can also prevent the positive and negative electrode materials on the electrode sheet from falling off, thus ensuring the quality of electrode tab welding and solving the above-mentioned shortcomings in the technology.

[0006] To achieve the above objectives, this utility model provides an ultrasonic welding auxiliary device, including a welding device body and a pressing mechanism disposed inside the welding device body. The pressing mechanism includes a pressure plate, and a limiting groove is formed on the side of the pressure plate that contacts the electrode. The pressure plate is used to press the electrode. When the pressure plate contacts the electrode, the electrode tab to be welded is located in the limiting groove, thereby limiting both sides of the electrode tab.

[0007] Furthermore, the welding equipment body includes a mounting base, on which a driving cylinder is provided. The output end of the driving cylinder is connected to a mounting plate. On the side of the mounting plate away from the driving cylinder, there are two welding head fixing seats. The two welding head fixing seats are spaced apart, and an ultrasonic welding head is provided between them. The ultrasonic welding head is located in the limiting groove.

[0008] Furthermore, a guide assembly is provided between the mounting base and the mounting plate. The guide assembly includes at least one guide rod bearing seat on the mounting base and at least one guide rod on the mounting plate. The guide rod can slide within the guide bearing seat.

[0009] Furthermore, the mounting plate has at least one mounting hole, and the pressing mechanism also includes a fixing plate disposed on the side of the mounting plate away from the driving cylinder. The fixing plate is connected to the mounting plate by connecting bolts and the mounting hole.

[0010] Furthermore, a movable seat is provided at the end of the pressure plate away from the limiting groove, and a limiting rod is slidably inserted through the movable seat. A movable groove is opened on the side of the fixed plate away from the mounting plate, and the limiting rod is installed in the movable groove. A plurality of spaced adjustment holes are opened on the fixed plate, which are connected to the movable groove and perpendicular to the movable groove. A fixed hole is opened on the movable seat corresponding to the adjustment hole. A fastening bolt is threaded into the inner wall of one of the adjustment holes, and the bottom outer wall of the fastening bolt is threaded to the inner wall of the fixed hole.

[0011] In the above technical solution, the technical effects and advantages provided by this utility model are as follows: by setting a pressure plate, the electrode sheet can be pressed during the welding process, which can prevent the electrode foil from wrinkling and breaking, and can also prevent ultrasonic waves from being transmitted to the area of ​​the electrode sheet covered with positive and negative electrode materials, causing the positive and negative electrode materials on the electrode sheet to fall off. The setting of the limiting groove can limit the electrode tab to be welded, which can ensure the quality of electrode tab welding, thereby solving the above-mentioned shortcomings in the technology. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a three-dimensional structural diagram of the mounting part of the pressing mechanism of this utility model.

[0015] Figure 3 This is a left vertical sectional view of the pressing mechanism of this utility model.

[0016] Figure 4 This utility model Figure 3 Enlarged view of part A.

[0017] Figure 5 This is a three-dimensional structural diagram of the mounting plate of this utility model.

[0018] Figure 6 This is an exploded three-dimensional view of the pressing mechanism of this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Welding equipment body; 101. Mounting base; 102. Drive cylinder; 103. Mounting plate; 104. Welding head fixing seat; 105. Ultrasonic welding head; 106. Guide rod bearing seat; 107. Guide rod; 108. Mounting hole;

[0021] 2. Pressing mechanism; 201. Fixing plate; 202. Connecting bolt; 203. Movable groove; 204. Adjustment hole; 205. Limiting rod; 206. Movable seat; 207. Pressing plate; 208. Limiting groove; 209. Fixing hole; 210. Fastening bolt. Detailed Implementation

[0022] This utility model provides, for example Figures 1-2 An ultrasonic welding auxiliary device is shown, comprising a welding device body 1 and a pressing mechanism 2 disposed inside the welding device body 1. The welding device body 1 includes a mounting base 101, on which a drive cylinder 102 is mounted. The output end of the drive cylinder 102 is connected to a mounting plate 103. Two welding head fixing seats 104 are provided on the side of the mounting plate 103 away from the drive cylinder 102, spaced apart, with an ultrasonic welding head 105 disposed between them. (Continue reading) Figures 1-2The pressing mechanism 2 includes a pressing plate 207, on the side of the pressing plate 207 that contacts the electrode sheet, a limiting groove 208 is provided; the pressing plate 207 is used to press the electrode sheet, and when the pressing plate 207 contacts the electrode sheet, the electrode tab to be welded is located in the limiting groove 208 to limit both sides of the electrode tab. The ultrasonic welding head 105 is located in the limiting groove 208.

[0023] In another embodiment, to ensure the stability of the drive cylinder 102 driving the mounting plate 103, a guide assembly is provided between the mounting base 101 and the mounting plate 103. The guide assembly includes at least one guide rod bearing seat 106 disposed on the mounting base 101 and at least one guide rod 107 disposed on the mounting plate 103. The guide rod 107 can slide within the guide bearing seat 106. In this embodiment, there are two guide rod bearing seats 106 and two guide rods 107. This number is not limited, and other numbers of guide assemblies are also feasible.

[0024] The pressing mechanism 2 is also mounted on the mounting plate 103. When the driving cylinder 102 drives the mounting plate 103 to move, it can also drive the pressing mechanism 2 to move synchronously. The structure of the pressing mechanism 2 mounted on the mounting plate 103 is described in detail below.

[0025] like Figure 2 , 3 As shown in Figures 5 and 6, the mounting plate 103 has at least one mounting hole 108. The pressing mechanism 2 also includes a fixing plate 201 disposed on the side of the mounting plate 103 away from the driving cylinder 102. The fixing plate 201 is connected to the mounting plate 103 by connecting bolts 202 and the mounting hole 108. In this embodiment, the number of mounting holes 108 and connecting bolts 202 are two each. This number is not limited, and other numbers of mounting holes 108 and connecting bolts 202 are also feasible.

[0026] See Figures 3-6 Different widths or types of electrodes require different positions for the pressing plate 207 of the pressing mechanism 2, necessitating an adjustable position for the pressing plate 207. A movable seat 206 is located at the end of the pressing plate 207 furthest from the limiting groove 208. A limiting rod 205 slidably passes through the movable seat 206. A movable groove 203 is formed on the side of the fixed plate 201 furthest from the mounting plate 103, and the limiting rod 205 is installed within the movable groove 203. The fixed plate 201 has several spaced-apart adjusting holes 204 that communicate with and are perpendicular to the movable groove 203. A fixing hole 209 is formed on the movable seat 206 corresponding to the position of the adjusting hole 204. A fastening bolt 210 is threaded into the inner wall of one of the adjusting holes 204, with the bottom outer wall of the fastening bolt 210 threadedly connected to the inner wall of the fixing hole 209. Connecting the fastening bolt 210 to different adjusting holes 204 allows for adjustment of the position of the pressing plate 207, resulting in a simple and convenient structure.

[0027] By setting the pressure plate 207, the electrode sheet can be pressed during the welding process, which can prevent the electrode foil from wrinkling and breaking, and also prevent the ultrasonic waves from reaching the area of ​​the electrode sheet covered with positive and negative electrode materials, causing the positive and negative electrode materials on the electrode sheet to fall off. The setting of the limiting groove 208 can limit the electrode tab to be welded, which can ensure the quality of electrode tab welding and solve the above-mentioned shortcomings in the technology.

[0028] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An ultrasonic welding auxiliary device, comprising a welding device body (1), characterized in that, It also includes a pressing mechanism (2) disposed inside the welding equipment body (1). The pressing mechanism (2) includes a pressure plate (207). The side of the pressure plate (207) that contacts the electrode sheet has a limiting groove (208). The pressure plate (207) is used to press the electrode sheet. When the pressure plate (207) contacts the electrode sheet, the electrode tab to be welded is located in the limiting groove (208) to limit both sides of the electrode tab.

2. The ultrasonic welding auxiliary equipment according to claim 1, characterized in that: The welding equipment body (1) includes a mounting base (101), on which a driving cylinder (102) is provided. The output end of the driving cylinder (102) is connected to a mounting plate (103). On the side of the mounting plate (103) away from the driving cylinder (102), there are two welding head fixing seats (104). The two welding head fixing seats (104) are spaced apart, and an ultrasonic welding head (105) is provided between them. The ultrasonic welding head (105) is located in the limiting groove (208).

3. The ultrasonic welding auxiliary equipment according to claim 2, characterized in that: A guide assembly is provided between the mounting base (101) and the mounting plate (103). The guide assembly includes at least one guide rod bearing seat (106) on the mounting base (101) and at least one guide rod (107) on the mounting plate (103). The guide rod (107) can slide within the guide rod bearing seat (106).

4. The ultrasonic welding auxiliary equipment according to claim 2, characterized in that: The mounting plate (103) has at least one mounting hole (108), and the pressing mechanism (2) further includes a fixing plate (201) disposed on the side of the mounting plate (103) away from the driving cylinder (102). The fixing plate (201) is connected to the mounting plate (103) by connecting bolts (202) and the mounting hole (108).

5. The ultrasonic welding auxiliary equipment according to claim 4, characterized in that: The pressure plate (207) has a movable seat (206) at one end away from the limiting groove (208). A limiting rod (205) is slidably inserted on the movable seat (206). The fixed plate (201) has a movable groove (203) on one side away from the mounting plate (103). The limiting rod (205) is installed in the movable groove (203). The fixed plate (201) has a plurality of spaced adjustment holes (204) that are connected to the movable groove (203) and perpendicular to the movable groove. The movable seat (206) has a fixed hole (209) corresponding to the adjustment hole (204). A fastening bolt (210) is threaded into the inner wall of one of the adjustment holes (204). The bottom outer wall of the fastening bolt (210) is threaded to the inner wall of the fixed hole (209).

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