16850 cylindrical battery terminal cap laser welding machine
2019-12-09
Battery ear laser welding machineIt is a process for welding the cylindrical battery ear to the battery cap, which requires the use of a laser spot welding machine for good welding. Since the positive electrode material is aluminum, it can be spot welded with four or six points. Regardless of the number of points, this type of welding requires tensile welding later. Normally, we determine whether it is well welded based on a force of 1-3 kg. Due to the variety of models of cylindrical batteries, the tensile strength after welding the ear to the cap varies. Cylindrical batteries include 18650/22650/26650/32650. In the market, compared to soft-pack and square aluminum shell batteries, this type of cylindrical battery is relatively uniform in industry specifications, and the industry has basically reached a consensus.
The cylindrical battery cap laser welding machine requires several laser welding processes for a single cap. Since the cylindrical battery cap is composed of several components, they all need to be welded one by one before they can be combined. Generally, explosion-proof caps include porous grooves (hole plates), explosion-proof aluminum sheets, rubber rings, peripheral sealing rubber rings, stainless steel (nickel-plated steel) top covers, and outer concave aluminum grooves! The welding involves spot welding of the explosion-proof aluminum sheet and the porous groove. Some are welded with four points, while others are with six points. The function of this explosion-proof sheet is understood by everyone, so we won't elaborate further!
Therefore, the welding area is the connection between the explosion-proof sheet and the bottom connection piece. Its welding tensile strength is similar to the anti-welding and explosion-proof capability. When the internal pressure of the battery exceeds, it will cause the explosion-proof sheet to reverse, thus pulling apart its welding point to achieve power disconnection. If the pressure continues to rise and reaches the explosion-proof capability of the anti-welding sheet, the explosion-proof sheet will rupture, thus preventing battery explosion. The explosion-proof sheet wraps around the edge of the porous top cover; some are wrapped around the edge of the top cover and then welded, while others are wrapped around the edge of the top cover after welding, making the welding traces invisible. These weldings can be arc welding or linear welding, and the structure differs, so the selectable welding methods vary. However, seemingly similar weldings have different power.Cap laser welding machineThe power also varies accordingly.
Summary: The important role of the 18650 cylindrical battery cap is to achieve power disconnection and explosion-proofing, which is realized through spot welding with the ear!
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Shenzhen SHINHOP Laser Equipment Co., Ltd. It is a scientific and technological enterprise specializing in the research and development, production and sales of industrial laser processing equipment. It has been deeply engaged in the new energy industry for 20 years, focusing on the non-standard customization of automatic lithium battery cell assembly line and module PACK production line. It has successively obtained the national high-tech and specialized new enterprise certification.
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Company Address：Building 6, Jingneng Science and Technology Environmental Protection Industrial Park, No.3 Baolong 2nd Road, Longgang District, Shenzhen City, Guangdong Province
Customer service hotline:18898357350
Customer service E-mail:info@shinhop.com
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