Transfer welding tool for lithium battery tabs

Abstract

The utility model relates to a lithium battery tab transfer welding tool, which comprises a positioning base, a welding copper block, a cover plate seat, a cover plate and a nickel strap pressing claw, the rear end of the positioning base is fixedly connected with the cover plate seat, the cover plate seat is in pin joint with the cover plate, the cover plate is opened and closed relative to the positioning base through a pin shaft, the cover plate is fixedly connected with the nickel strap pressing claw, and the nickel strap pressing claw is in pin joint with the welding copper block. The positioning base is provided with a positioning groove for placing a battery to be welded along the length direction of the positioning base, the front end of the positioning groove is provided with a positive tab positioning groove and a nickel strap positioning groove, a nickel strap magnet is embedded in the nickel strap positioning groove corresponding to a nickel strap placing part, and a welding copper block is embedded in the bottom of the positioning base. A plurality of tools are used in turn, so that battery placement and welding operation are carried out simultaneously, and the welding efficiency and the equipment utilization rate are improved. And each set of tool is consistent in size and precision and has interchangeability, and two positioning sleeves are arranged at the bottom, so that the accuracy and consistency of the position when the tool is placed at a welding station are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium-ion batteries, and in particular to a transfer welding tool for lithium battery tabs. Background Art

[0002] Lithium-ion batteries offer advantages such as high voltage, high specific energy, a high number of cycles, and long storage life. They are widely used not only in portable electronic devices such as mobile phones, digital cameras, and laptops, but also in large and medium-sized electric equipment such as electric vehicles, electric bicycles, and power tools. Consequently, the performance requirements for lithium-ion batteries are becoming increasingly demanding. Polymer batteries require the positive aluminum tab to be welded to a nickel tab before the packaging process. How to accurately, securely, and efficiently complete this tab welding has become a pressing issue.

[0003] The existing tab transfer welding technology is: using a laser welder to weld, placing the battery to be welded on the workbench, placing the nickel strip, pressing the claws, triggering the laser to start welding, and removing the battery after welding is completed. The disadvantage of this operation is that it takes a long time to place the battery and nickel strip. During this time, the laser welder is in a waiting state, and the welding efficiency is very low, which cannot meet the production progress of the line. Therefore, it is urgent to improve the welding efficiency and produce efficient and stable special welding tooling. Utility Model Content

[0004] The utility model aims to overcome the deficiencies in the prior art and provides a transfer welding tool for lithium battery tabs, thereby ensuring the relative position and compaction of the nickel strip and the positive tab. Multiple tools are placed on the battery and welded in turn, thereby ensuring welding efficiency.

[0005] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions: a transfer welding tool for a lithium battery tab, comprising a positioning base, a welding copper block, a cover plate seat, a cover plate and a nickel strip pressure claw. The rear end of the positioning base is fixedly connected to the cover plate seat, the cover plate seat is pinned to the cover plate, the cover plate is opened and closed relative to the positioning base through a pin shaft, the cover plate is fixedly connected to the nickel strip pressure claw, the positioning base is provided with a positioning groove for placing the battery to be welded along its length direction, the front end of the positioning groove is provided with a positive tab positioning groove and a nickel strip positioning groove, the nickel strip positioning groove is inlaid with a nickel strip magnet at the nickel strip placement position corresponding to the nickel strip, and the welding position is inlaid with a welding copper block.

[0006] Furthermore, the positioning base is made of red bakelite.

[0007] Furthermore, two positioning copper sleeves are provided at corresponding welding positions on the bottom of the positioning base.

[0008] Furthermore, the positioning base is provided with an avoidance groove in a direction perpendicular to the positioning groove of the battery to be welded for manual removal of the battery.

[0009] Furthermore, a battery top block is placed at the rear end of the positioning groove of the battery to be welded on the positioning base, and the battery top block presses the battery to be welded to a limited position through two compression springs installed on the cover seat.

[0010] Furthermore, the cover plate seat is made of POM material.

[0011] Furthermore, the cover is made of POM material, and two upper pressing magnets are embedded on the inner surface of the cover. When the cover is closed, the upper pressing magnets are attracted to the lower pressing magnets on the positioning base.

[0012] Furthermore, the nickel strip pressing claw is made of spring steel material, and the contact portion between the nickel strip pressing claw and the nickel strip is an open structure.

[0013] Beneficial Effects: Compared to existing technologies, this new tooling system utilizes multiple tools in rotation, allowing battery placement and welding operations to proceed simultaneously, improving welding efficiency and equipment utilization. This new tooling system incorporates a built-in battery positioning mechanism and welding pressure claws. Once the battery and nickel strip are positioned, the pressure claws secure the relative positioning of the nickel strip and the tabs, allowing for laser welding. Each tooling set is designed to be interchangeable, with consistent dimensions and precision. Two positioning sleeves on the bottom ensure accurate and consistent positioning when placed in the welding station. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 yes Figure 1 Open the state structure diagram;

[0016] Figure 3 yes Figure 1 Open the structural diagram after removing the battery;

[0017] Figure 4 yes Figure 1 Schematic diagram of the bottom structure;

[0018] Figure 5 It is a schematic diagram of the structure of the battery tab to be welded;

[0019] Figure 6 It is a schematic diagram of the structure of the welded battery tab.

[0020] In the figure: 1. Positioning base, 1-1. Lower pressing magnet, 1-2. Welding copper block, 1-3. Nickel strip magnet, 1-4. Positioning copper sleeve, 1-5. Positioning slot for placing the battery to be welded, 1-6. Positive ear positioning slot, 1-7. Nickel strip positioning slot, 1-8. Avoidance slot for manual removal of batteries, 2. Battery to be welded, 2-1. Welded battery, 3. Nickel strip, 4. Cover seat, 4-1. Pin, 5. Cover, 5-1. Upper pressing magnet, 6. Nickel strip pressure claw, 7. Battery top block, 8. Compression spring. DETAILED DESCRIPTION

[0021] The following is a detailed description of the specific implementation method provided by the present invention in combination with the preferred embodiment: See the accompanying drawings for details. This embodiment provides a transfer welding tool for lithium battery pole ears, including a positioning base 1, a welding copper block 1-2, a cover plate seat 4, a cover plate 5 and a nickel strip pressure claw 6. The rear end of the positioning base is fixedly connected to the cover plate seat, and the cover plate seat is pinned with the cover plate. The cover plate is opened and closed relative to the positioning base through the pin shaft 4-1. The cover plate is fixedly connected to the nickel strip pressure claw 6. The positioning base is provided with a positioning groove 1-5 for placing the battery 2 to be welded along its length direction, and the front end of the positioning groove is provided with a positive ear positioning groove 1-6 and a nickel strip positioning groove 1-7. The nickel strip positioning groove is inlaid with a nickel strip magnet 1-3 at the nickel strip placement position corresponding to the nickel strip, and the welding position is inlaid with a welding copper block 1-2.

[0022] A preferred solution of this embodiment is that the positioning base is made of red bakelite.

[0023] The preferred solution of this embodiment is that two positioning copper sleeves 1-4 are provided at the bottom of the positioning base corresponding to the welding position. The two positioning copper sleeves ensure that the position of the tooling is accurately fixed when the tooling is placed in turn, thereby ensuring that the laser welding position is accurate.

[0024] A preferred solution of this embodiment is that the positioning base is provided with avoidance grooves 1-8 for manual removal of batteries in a direction perpendicular to the positioning grooves of the batteries to be welded, so as to facilitate manual operation.

[0025] A preferred solution of this embodiment is to place a battery support block 7 at the rear end of the positioning groove of the battery to be welded on the positioning base. This support block 7 is secured to the battery to be welded in a defined position by two compression springs 8 mounted on the cover base 4. This ensures the positive tab welding position. The compression springs 8 have moderate force, ensuring that the battery to be welded is properly positioned without causing any deformation.

[0026] The preferred solution of this embodiment is that the cover plate seat 4 is made of POM material and is fixed to the positioning base 1 by screws.

[0027] The preferred solution of this embodiment is that the cover is made of POM material, and two upper clamping magnets 5-1 are embedded on the inner surface of the cover. When the cover is closed, the upper clamping magnet is attracted to the lower clamping magnet 1-1 on the positioning base 1, and drives the pressure claw 6 to clamp the nickel strip to facilitate welding, thereby preventing gaps between the nickel strip 3 and the positive electrode ear from causing welding explosions and cold welds.

[0028] The preferred solution of this embodiment is that the nickel strip pressure claw 6 is made of spring steel material. The contact part between the nickel strip pressure claw and the nickel strip is an open structure to ensure that the laser passes through the welding part. At the same time, the two small claws can compact the nickel strip and the positive ear. Spring steel material has high hardness and strong elasticity, and can compact it tightly.

[0029] Working process:

[0030] During the tab transfer welding operation, about 6 work pieces are prepared, two operators are responsible for loading the batteries, and one operator is responsible for welding.

[0031] The specific operation process is as follows: two operators respectively take the empty transfer welding tool, open the cover 5, put in the battery 2 to be welded, align the positive ear with the positive ear positioning groove on the positioning base, at this time, the compression spring 8 presses the battery 2 to be welded to a fixed position through the battery top block 7, and then takes a nickel strip 3 and puts it on the positive ear through the nickel strip positioning groove. At this time, the nickel strip magnet 1-3 sucks the nickel strip 3 tightly, closes the cover 5, and the pressure claw 6 presses the nickel strip and the positive ear to the welding copper block 1-2 through the magnetic force of the lower pressing magnet 1-1 and the upper pressing magnet 5-1. At this time, the operator in charge of welding puts the tool on the welding workbench and positions it through the positioning copper sleeve 1-4 and the positioning pin on the workbench, triggers the laser switch, starts welding, and completes welding instantly. Remove the tool, open the cover 5, take out the welded battery 2-1, and pass the empty tool to the operator in front who is responsible for loading the battery. Then take a tool with a good battery to the welding station for welding, and repeat this process to ensure maximum utilization of the laser welding machine and improve welding efficiency and production capacity.

[0032] The positive ear positioning groove of the utility model fixes the position of the positive ear, the nickel strip positioning groove and the nickel strip magnet fix the position of the nickel strip, the pressing claw presses the nickel strip and the positive ear on the welding copper block, the positioning copper sleeve ensures the welding position, and multiple toolings weld in turn to ensure welding efficiency.

[0033] The above-mentioned detailed description of the transfer welding tool for lithium battery tabs with reference to the embodiment is illustrative rather than restrictive, and several embodiments can be listed according to the limited scope. Therefore, changes and modifications without departing from the overall concept of the present invention should fall within the scope of protection of the present invention.

Claims

1. A transfer welding tool for lithium battery tabs, characterized by: It includes a positioning base, a welding copper block, a cover plate seat, a cover plate and a nickel strip pressure claw. The rear end of the positioning base is fixedly connected to the cover plate seat, the cover plate seat is pinned to the cover plate, the cover plate is opened and closed relative to the positioning base through a pin shaft, the cover plate is fixedly connected to the nickel strip pressure claw, the positioning base is provided with a positioning groove for placing the battery to be welded along its length direction, the front end of the positioning groove is provided with a positive ear positioning groove and a nickel strip positioning groove, the nickel strip positioning groove is inlaid with a nickel strip magnet at the nickel strip placement position corresponding to the nickel strip, and the welding position is inlaid with a welding copper block.

2. The transfer welding tool for lithium battery tabs according to claim 1, characterized in that: The positioning base is made of red bakelite material.

3. The transfer welding tool for lithium battery tabs according to claim 1 or 2, characterized in that: Two positioning copper sleeves are provided at the bottom of the positioning base corresponding to the welding positions.

4. The transfer welding tool for lithium battery tabs according to claim 3, characterized in that: The positioning base is provided with an avoidance groove in a direction perpendicular to the positioning groove of the battery to be welded for manual removal of the battery.

5. The transfer welding tool for lithium battery tabs according to claim 4, characterized in that: A battery top block is placed at the rear end of the positioning groove of the battery to be welded on the positioning base, and the battery top block presses the battery to be welded to a defined position via two compression springs mounted on the cover base.

6. The transfer welding tool for lithium battery tabs according to claim 1, characterized in that: The cover plate seat is made of POM material.

7. The transfer welding tool for lithium battery tabs according to claim 1, characterized in that: The cover is made of POM material, and two upper pressing magnets are embedded on the inner surface of the cover. When the cover is closed, the upper pressing magnets are attracted to the lower pressing magnets on the positioning base.

8. The transfer welding tool for lithium battery tabs according to claim 1, characterized in that: The nickel strip pressing claw is made of spring steel material, and the contact portion between the nickel strip pressing claw and the nickel strip is an open structure.

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