{"id":33575,"date":"2025-04-23T16:46:22","date_gmt":"2025-04-23T08:46:22","guid":{"rendered":"https:\/\/www.ray-tron.com\/?p=33575"},"modified":"2025-04-23T16:46:29","modified_gmt":"2025-04-23T08:46:29","slug":"202501-2","status":"publish","type":"post","link":"https:\/\/www.ray-tron.com\/en\/202501-2\/","title":{"rendered":"How is the weldability of copper clad aluminum strip?"},"content":{"rendered":"<p>The weldability of copper-clad aluminum strip determines whether it can be widely used in<strong><a href=\"https:\/\/www.ray-tron.com\/en\/pvribbon\/\" data-internallinksmanager029f6b8e52c=\"43\" title=\"Photovoltaic welding ribbon\">Photovoltaic welding ribbon<\/a>, battery leads, electronic packaging<\/strong>Because its structure is a composite material of &quot;outer copper + inner aluminum&quot;, its weldability is different and challenging compared to pure copper.<strong>Good welding results can be achieved through high-quality material design and process optimization<\/strong>.<\/p><hr class=\"wp-block-separator has-alpha-channel-opacity\"\/><h2 class=\"wp-block-heading\">1. Welding performance characteristics of copper clad aluminum strip<\/h2><h3 class=\"wp-block-heading\">1. <strong>Surface copper has excellent solderability<\/strong><\/h3><ul class=\"wp-block-list\"><li>Copper itself has excellent welding properties (especially with alloys such as tin, lead, and silver).<\/li>\n\n<li>If the copper layer is thick enough (\u22655\u03bcm), reliable soldering can be guaranteed without exposing the aluminum base.<\/li>\n\n<li>Multilayer composite copper strip<a href=\"https:\/\/www.ray-tron.com\/en\/\" data-internallinksmanager029f6b8e52c=\"19\" title=\"Ruichuang 2\">Raytron<\/a>The product produced has a performance close to pure copper in the welding area.<\/li><\/ul><h3 class=\"wp-block-heading\">2. <strong>The welding process requires heat control<\/strong><\/h3><ul class=\"wp-block-list\"><li>The thermal conductivity of aluminum is higher than that of copper, but the overall thermal conductivity of copper-clad aluminum is still slightly lower than that of pure copper, so the temperature or time needs to be appropriately increased during welding.<\/li>\n\n<li>Overheating during welding may cause the copper layer to melt through and the aluminum to oxidize, so temperature control is very critical.<\/li><\/ul><h3 class=\"wp-block-heading\">3. <strong>Soldering stability depends on the quality of copper layer bonding<\/strong><\/h3><ul class=\"wp-block-list\"><li>If the copper layer is not firmly bonded to the aluminum base (such as uneven electroplating or loose rolling), the copper layer may peel or peel off during high-temperature welding, resulting in poor welding.<\/li>\n\n<li>High-end manufacturers such as Ruichuang use high-precision composite rolling technology to effectively ensure the firmness of the copper-aluminum bond.<\/li><\/ul><hr class=\"wp-block-separator has-alpha-channel-opacity\"\/><h2 class=\"wp-block-heading\">2. Several key factors affecting the weldability of copper-clad aluminum<\/h2><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>factor<\/th><th>Impact Statement<\/th><th>Recommendations<\/th><\/tr><\/thead><tbody><tr><td>Copper layer thickness<\/td><td>Too thin a copper layer will affect solder joint strength and soldering stability<\/td><td>Recommended \u22655\u03bcm, special requirements can reach 8~12\u03bcm<\/td><\/tr><tr><td>Copper-aluminum bonding<\/td><td>Poor bonding can easily lead to peeling during welding<\/td><td>Choose calendaring bonding process, which is better than electroplating bonding<\/td><\/tr><tr><td>Surface cleanliness<\/td><td>Oxidation or contamination can seriously affect welding<\/td><td>Store tightly sealed and clean the surface before use<\/td><\/tr><tr><td>Soldering temperature<\/td><td>If the temperature is too low, the welding will not be strong, and if it is too high, the structure will be damaged.<\/td><td>Need to match equipment for process debugging<\/td><\/tr><\/tbody><\/table><\/figure><hr class=\"wp-block-separator has-alpha-channel-opacity\"\/><h2 class=\"wp-block-heading\">3. Applicable welding methods<\/h2><p>Copper clad aluminum strip is suitable for many common welding processes:<\/p><ul class=\"wp-block-list\"><li>\u2705 <strong>Soldering\/ Reflow<\/strong><\/li>\n\n<li>\u2705 <strong>Laser welding\/ultrasonic welding<\/strong><\/li>\n\n<li>\u2705 <strong>Infrared hot pressing welding<\/strong><\/li>\n\n<li>\u26a0\ufe0f Direct use of high temperature and high pressure spot welding is not recommended (it may damage the copper layer)<\/li><\/ul><hr class=\"wp-block-separator has-alpha-channel-opacity\"\/><h2 class=\"wp-block-heading\">Summarize<\/h2><blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><a href=\"https:\/\/www.ray-tron.com\/en\/tongbaolvdai\/\" data-internallinksmanager029f6b8e52c=\"178\" title=\"Copper clad aluminum strip manufacturer_Copper clad aluminum wire supplier_Copper clad aluminum strip wholesaler manufacturer\">Copper clad aluminum strip<\/a><strong>Good welding performance<\/strong>, but the premise is<strong>The copper layer thickness is sufficient, the bonding strength is high, the surface is clean and free of oxidation, and the welding process is properly matched<\/strong>High-quality products such as Ruichuang&#039;s copper-clad aluminum photovoltaic welding ribbon show very high welding stability and consistency in mass production, and can completely replace traditional copper ribbons.<\/p><\/blockquote>","protected":false},"excerpt":{"rendered":"<p>\u94dc\u5305\u94dd\u5e26\u7684\u710a\u63a5\u6027\u662f\u51b3\u5b9a\u5176\u80fd\u5426\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5149\u4f0f\u710a\u5e26\u3001\u7535\u6c60\u5f15\u7ebf\u3001\u7535\u5b50\u5c01\u88c5\u7b49\u9886\u57df\u7684\u5173\u952e\u6027\u80fd\u4e4b\u4e00\u3002\u7531\u4e8e\u5176\u7ed3\u6784\u662f\u201c\u5916\u5c42\u94dc+ [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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