Lithium battery tab welding device

Abstract

The utility model relates to a lithium battery tab welding device, and belongs to the technical field of tab welding. The lithium battery tab welding device comprises an operation table, and a spot welding machine and a placing table are installed at the top end of the operation table; the limiting mechanism comprises a fixing plate fixedly connected to one side of the placing table and an installation rod installed on the fixing plate, and the installation rod is installed on the fixing plate; according to the scheme, when an amplitude-change pole and a welding head of the spot welding machine move downwards for welding, the limiting mechanism can be driven to operate synchronously, and when the welding head of the spot welding machine moves downwards and is still located above a tab material, under the action of a driving plate, a cylinder, a round rod, a second spring, a movable rod and a first spring, the movable rod can move downwards; the limiting plates synchronously limit the tab materials on the two sides of the welding head, so that the tabs and the pole pieces are kept stable in the process that the welding head continues to move downwards for welding, dislocation of the welding positions of the tabs and the pole pieces is avoided, and the welding effect of the tabs and the pole pieces is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of electrode welding technology, and in particular to a lithium battery electrode welding device. Background Technology

[0002] The tab is a raw material for lithium-ion polymer battery products. Batteries have positive and negative electrodes, and the tab is a metal conductor that leads the positive and negative electrodes out of the cell. In the manufacturing process of lithium-ion batteries, welding the tab to the electrode sheet is a crucial step.

[0003] Currently, ultrasonic metal spot welding machines are commonly used to weld tabs and electrode sheets. When welding with an ultrasonic metal spot welding machine, the tabs and electrode sheets are placed on the welding table of the ultrasonic metal spot welding machine as required. The welding head of the ultrasonic metal spot welding machine contacts the tab material and transmits ultrasonic energy to the welding area to achieve local melting and connection of the tabs and electrode sheets, thereby completing the welding.

[0004] However, since the tabs are usually made of thin aluminum, nickel, or nickel-plated copper, when the tabs and electrodes are placed on the welding table, the tabs are easily deformed by external forces due to their own material properties. This can lead to misalignment of the welding parts between the tabs and electrodes, affecting the welding effect between the tabs and electrodes. Utility Model Content

[0005] Therefore, it is necessary to provide a lithium battery tab welding device to address the problem that the tab is easily deformed by external forces due to its own material, which leads to misalignment at the welding point between the tab and the electrode and affects the welding effect between the tab and the electrode.

[0006] The device includes: an operating table, on the top of which a spot welding machine and a placement platform are mounted; and a limiting mechanism, which includes a fixed plate fixedly connected to one side of the placement platform and an mounting rod mounted to the fixed plate. A movable rod is slidably connected to one side of the mounting rod. A first spring is fixedly connected between the bottom end of the movable rod and the inner wall of the mounting rod. A cylinder is fixedly connected to the end of the movable rod away from the mounting rod. A round rod is slidably connected to the inner wall of the cylinder. A second spring is fixedly connected between the top end of the round rod and the inner top wall of the cylinder. The bottom end of the round rod extends through the cylinder and is fixedly connected to a connecting rod. A limiting plate is fixedly connected to one end of the connecting rod.

[0007] In one embodiment, the limiting mechanism further includes a drive plate, and a mounting block is fixedly connected to the surface of the spot welding machine amplitude transformer. The drive plate and the mounting block are installed by bolts and nuts. The mounting block allows for a detachable structure between the drive plate and the spot welding machine amplitude transformer, improving the practicality of the device during use.

[0008] In one embodiment, damping pads are fixedly connected to both the bottom end of the drive plate and the top end of the cylinder, with the two damping pads located on the same vertical plane. When the drive plate is subjected to vibration from the amplitude transformer of the spot welding machine, the force of the drive plate vibration is transmitted to the two damping pads. The interaction between the two damping pads helps to absorb the vibration of the drive plate, thereby ensuring the stability of the drive plate in pushing the cylinder downward.

[0009] In one embodiment, the limiting plate is U-shaped, and its center point coincides with the center point of the placement platform. This facilitates simultaneous positioning of the tab materials located on both sides of the welding head, improving the positioning effect of the tab materials.

[0010] In one embodiment, a contact pad, which is a rubber component, is fixedly connected to the bottom end of the limiting plate. This helps to enhance the stability of the limiting plate when limiting the tab material.

[0011] In one embodiment, a limiting rod is fixedly connected to one end of the limiting plate, and a ring is fixedly connected to the surface of the mounting rod. The end of the limiting rod away from the limiting plate extends through the ring. This facilitates limiting the movement path of the limiting plate.

[0012] In one embodiment, a groove matching the movable rod is provided on one side of the mounting rod. This facilitates limiting the movement path of the movable rod.

[0013] Beneficial effects

[0014] 1. In this solution, when the amplitude rod and welding head of the spot welding machine move downward to weld, it is beneficial to drive the limiting mechanism to operate synchronously. When the welding head of the spot welding machine moves downward and is still above the electrode material, under the action of the drive plate, cylinder, rod, second spring and first spring of the moving rod, the limiting plate synchronously limits the electrode material on both sides of the welding head, thereby ensuring that the electrode and electrode remain stable during the welding process as the welding head continues to move downward, avoiding misalignment of the welding parts of the electrode and electrode, thus ensuring the welding effect of the electrode and electrode.

[0015] 2. When the cylinder is pushed downward by the drive plate, two damping pads that abut against each other are set between the drive plate and the cylinder. When the drive plate is subjected to the vibration of the spot welding machine's amplitude rod, the vibration force of the drive plate will be transmitted to the two damping pads. Under the interaction of the two damping pads, the vibration of the drive plate is absorbed, thereby ensuring the stability of the drive plate pushing the cylinder downward. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the installation structure of the limiting mechanism of this utility model;

[0019] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle

[0020] Figure 4 This is a schematic diagram of the limiting mechanism structure of this utility model;

[0021] Figure 5 This is an exploded view of the mounting rod and fixing plate of this utility model.

[0022] Figure label:

[0023] 100. Operating table; 200. Spot welding machine; 300. Placement platform; 400. Limiting mechanism; 410. Fixing plate; 420. Mounting rod; 421. Ring; 430. Moving rod; 431. First spring; 440. Cylinder; 441. Round rod; 442. Second spring; 450. Connecting rod; 460. Limiting plate; 461. Contact pad; 462. Limiting rod; 470. Mounting block; 480. Drive plate; 490. Damping pad. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0029] The following is combined with Figures 1-5 This invention describes a lithium battery tab welding device.

[0030] In one embodiment, a lithium battery tab welding device includes: an operating table 100, with a spot welding machine 200 and a placement table 300 mounted on the top of the operating table 100; a limiting mechanism 400, which includes a fixed plate 410 fixedly connected to one side of the placement table 300 and an mounting rod 420 mounted to the fixed plate 410. A movable rod 430 is slidably connected to one side of the mounting rod 420. A first spring 431 is fixedly connected between the bottom end of the movable rod 430 and the inner wall of the mounting rod 420. A cylinder 440 is fixedly connected to the end of the movable rod 430 away from the mounting rod 420. A round rod 441 is slidably connected to the inner wall of the cylinder 440. A second spring 442 is fixedly connected between the top end of the round rod 441 and the inner top wall of the cylinder 440. The bottom end of the round rod 441 passes through the cylinder 440 and is fixedly connected to a connecting rod 450. A limiting plate 460 is fixedly connected to one end of the connecting rod 450.

[0031] It should be noted that the spot welding machine 200 includes an ultrasonic generator that converts mains power into a high-frequency AC signal to provide energy for welding; a transducer that converts the high-frequency electrical signal generated by the ultrasonic generator into mechanical vibration; an amplitude transformer that amplifies the vibration amplitude generated by the transducer and transmits the energy to the welding head; a welding head that directly contacts the electrode material and transmits ultrasonic energy to the welding area to achieve local melting and bonding; a pressure application device that applies appropriate pressure to the electrode during the welding process to ensure tight contact at the welding interface; and a control system that monitors and adjusts various parameters during the welding process to ensure stable welding quality.

[0032] The operating principle of the spot welding machine 200 is a known existing technology and a known welding device. The technical solution of this application is aimed at the problem of electrode tab welding limit. The spot welding machine 200 is not closely related to this technical solution and is only used in conjunction with this technical solution. Therefore, the internal structure of the spot welding machine 200 is not labeled and described in detail. The spot welding machine 200 is drawn with reference to existing machines.

[0033] In this embodiment, the welding head of the spot welding machine 200 is located above the placement table 300, and the center point of the welding head of the spot welding machine 200 coincides with the center point of the placement table 300.

[0034] The mounting rod 420 and the fixing plate 410 are installed with bolts. In the initial state, the horizontal height of the bottom end of the limiting plate 460 is lower than the horizontal height of the bottom end of the welding head of the spot welding machine 200.

[0035] like Figure 3 and Figure 4As shown, the limiting mechanism 400 also includes a drive plate 480. A mounting block 470 is fixedly connected to the surface of the amplitude transformer of the spot welding machine 200. The drive plate 480 and the mounting block 470 are installed by bolts and nuts. A damping pad 490 is fixedly connected to one side of the bottom end of the drive plate 480 and the top end of the cylinder 440. The two damping pads 490 are located on the same vertical plane.

[0036] In this embodiment, when the device is in use, after the drive plate 480 is installed with bolts and nuts, the drive plate 480 is in a horizontal state, the cylinder 440 is located below the drive plate 480, and the opposite ends of the two damping pads 490 are in contact.

[0037] like Figure 3 and Figure 4 As shown, the overall shape of the limiting plate 460 is U-shaped, and the center point of the limiting plate 460 coincides with the center point of the placement platform 300.

[0038] In this embodiment, when welding the electrode tab, the welding head of the spot welding machine 200 enters the inner side of the limiting plate 460 and contacts the opposite side of the limiting plate 460. Therefore, when the spot welding machine 200 moves downward to weld the electrode tab, the welding head of the spot welding machine 200 and the limiting plate 460 do not affect each other.

[0039] like Figure 4 As shown, a contact pad 461 is fixedly connected to the bottom end of the limiting plate 460, and the contact pad 461 is a rubber component.

[0040] In this embodiment, when the limiting plate 460 moves downward to limit the electrode tab, the surface of the contact pad 461 contacts the electrode tab. Since the contact pad 461 has the characteristic of high temperature resistance, the contact pad 461 is in a stable state of fixing the electrode tab during the welding process.

[0041] like Figure 4 As shown, a limiting rod 462 is fixedly connected to one end of the limiting plate 460, and a ring 421 is fixedly connected to the surface of the mounting rod 420. The end of the limiting rod 462 away from the limiting plate 460 passes through the ring 421.

[0042] In this embodiment, the surface of the limiting rod 462 is slidably connected to the inner wall of the ring 421, and the interaction between the limiting rod 462 and the ring 421 limits the movement path of the limiting plate 460.

[0043] like Figure 4 As shown, a groove matching the movable rod 430 is provided on one side of the mounting rod 420.

[0044] In this embodiment, the first spring 431 is located inside the slide groove, and the surface of the moving rod 430 is slidably connected to the inner wall of the slide groove.

[0045] Working principle: When welding the tab and electrode sheet, the tab and electrode sheet are placed on the placement table 300 according to the welding requirements. The spot welding machine 200 is started by the controller. When the amplitude rod and welding head of the spot welding machine 200 move downward to weld, it will drive the drive plate 480 to move downward synchronously, so that the two damping pads 490 press against each other and push the cylinder 440 downward. At this time, the cylinder 440 drives the moving rod 430 to move downward and compresses the first spring 431. At the same time, under the action of the second spring 442, the cylinder 440 will drive the second spring 442, the round rod 441, the connecting rod 450 and the limiting plate 460 to move downward synchronously. When the limiting plate 460 drives the contact pad 461 and the tab material... Upon contact, the limiting plate 460 cannot move further downward, thus limiting the tab material. At this time, the bottom end of the welding head of the spot welding machine 200 is above the horizontal height of the limiting plate 460. As the amplitude rod and welding head of the spot welding machine 200 continue to move downward to make the welding head contact the tab material, the cylinder 440 and the rod 441 will squeeze the second spring 442, causing the second spring 442 to compress. When the welding head contacts the tab material, it transmits ultrasonic energy to the welding area, realizing the local melting and connection of the tab and the electrode, thus completing the welding. When the welding is completed, when the amplitude rod and welding head of the spot welding machine 200 move upward, the first spring 431 and the second spring 442 lose the squeezing force and return to the initial state.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A lithium battery tab welding device, characterized in that, include: An operating table (100) is provided, on the top of which a spot welding machine (200) and a placement table (300) are mounted; A limiting mechanism (400) includes a fixed plate (410) fixedly connected to one side of a placement platform (300) and a mounting rod (420) mounted to the fixed plate (410). A movable rod (430) is slidably connected to one side of the mounting rod (420). A first spring (431) is fixedly connected between the bottom end of the movable rod (430) and the inner wall of the mounting rod (420). The movable rod (430) is located away from the mounting rod. One end of the rod (420) is fixedly connected to a cylinder (440), and a round rod (441) is slidably connected to the inner wall of the cylinder (440). A second spring (442) is fixedly connected between the top end of the round rod (441) and the inner top wall of the cylinder (440). The bottom end of the round rod (441) passes through the cylinder (440) and is fixedly connected to a connecting rod (450). One end of the connecting rod (450) is fixedly connected to a limit plate (460).

2. The lithium battery tab welding device according to claim 1, characterized in that, The limiting mechanism (400) also includes a drive plate (480), and an mounting block (470) is fixedly connected to the surface of the amplitude rod of the spot welding machine (200). The drive plate (480) and the mounting block (470) are installed by bolts and nuts.

3. The lithium battery tab welding device according to claim 2, characterized in that, The bottom side of the drive plate (480) and the top of the cylinder (440) are both fixedly connected to damping pads (490), and the two damping pads (490) are located on the same vertical plane.

4. The lithium battery tab welding device according to claim 1, characterized in that, The limiting plate (460) has an overall U-shaped shape, and the center point of the limiting plate (460) coincides with the center point of the placement platform (300).

5. The lithium battery tab welding device according to claim 1, characterized in that, The bottom end of the limiting plate (460) is fixedly connected to a contact pad (461), which is a rubber component.

6. The lithium battery tab welding device according to claim 1, characterized in that, One end of the limiting plate (460) is fixedly connected to a limiting rod (462), and a ring (421) is fixedly connected to the surface of the mounting rod (420). The end of the limiting rod (462) away from the limiting plate (460) passes through the ring (421).

7. The lithium battery tab welding device according to claim 1, characterized in that, The mounting rod (420) has a groove on one side that matches the moving rod (430).

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