{"id":33516,"date":"2025-03-26T16:59:32","date_gmt":"2025-03-26T08:59:32","guid":{"rendered":"https:\/\/www.ray-tron.com\/?p=33516"},"modified":"2025-03-26T16:59:45","modified_gmt":"2025-03-26T08:59:45","slug":"the-main-material-composition-of-photovoltaic-welding-ribbon","status":"publish","type":"post","link":"https:\/\/www.ray-tron.com\/en\/the-main-material-composition-of-photovoltaic-welding-ribbon\/","title":{"rendered":"The main material composition of photovoltaic welding ribbon"},"content":{"rendered":"<p><a href=\"https:\/\/www.ray-tron.com\/en\/pvribbon\/\" data-internallinksmanager029f6b8e52c=\"43\" title=\"Photovoltaic welding ribbon\">Photovoltaic welding ribbon<\/a>(Photovoltaic Ribbon) is usually composed of <strong>High conductivity copper<\/strong> It serves as the base material and is plated with a suitable solder material (mainly tin or other alloys) to enhance soldering performance, prevent oxidation and improve long-term reliability.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u26a1 <strong>1. Base material: high purity copper (Cu)<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Material Type:<\/strong> Main Use <strong>T2 oxygen-free copper (C1100) or OFE copper<\/strong>, copper content \u2265 99.95%.<\/li>\n\n\n\n<li><strong>Electrical conductivity:<\/strong> High-purity copper substrate has excellent electrical conductivity (conductivity \u2265 97% IACS), which can effectively reduce<a href=\"https:\/\/www.ray-tron.com\/en\/\" data-internallinksmanager029f6b8e52c=\"14\" title=\"Photovoltaic modules\">Photovoltaic modules<\/a>The resistance loss in .<\/li>\n\n\n\n<li><strong>Ductility:<\/strong> It has good ductility and weldability, and can withstand the thermal cycles and stress changes of photovoltaic modules to prevent solder joints from breaking.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83e\uddea <strong>2. Surface coating: tin or alloy coating<\/strong><\/h3>\n\n\n\n<p>The choice of coating directly affects the welding performance, oxidation resistance and durability of the welding strip. Common coating types include:<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u2705 <strong>(1) SN60PB40 (60% tin + 40% lead)<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Traditional tin-lead alloy:<\/strong> Melting point is about <strong>183\u00b0C-190\u00b0C<\/strong>.<\/li>\n\n\n\n<li><strong>advantage:<\/strong> Good wettability, low melting point, stable welding performance, easy to achieve high-quality solder joints.<\/li>\n\n\n\n<li><strong>shortcoming:<\/strong> Due to environmental issues with lead, it is currently being phased out in some markets.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u2705 <strong>(2) SN100 (pure tin layer)<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Lead-free solder:<\/strong> Melting point is about <strong>232\u00b0C<\/strong>.<\/li>\n\n\n\n<li><strong>advantage:<\/strong> Environmental protection, in compliance with RoHS standards, and good corrosion resistance.<\/li>\n\n\n\n<li><strong>shortcoming:<\/strong> Compared with lead-containing solder, the soldering temperature is higher and the soldering process requirements are higher.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u2705 <strong>(3) SN97AG3 (97% tin + 3% silver)<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>High Performance Lead-Free Alloys:<\/strong> Melting point is about <strong>221\u00b0C<\/strong>.<\/li>\n\n\n\n<li><strong>advantage:<\/strong> Good oxidation resistance and high temperature stability, suitable for welding of high reliability components.<\/li>\n\n\n\n<li><strong>shortcoming:<\/strong> The cost is high and the welding process is complicated.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udccf <strong>3. Tin coating thickness requirements<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Conventional thickness: 5\u03bcm \u2013 30\u03bcm.<\/li>\n\n\n\n<li><strong>Tin plating is too thick:<\/strong> It may cause tin overflow or cold soldering problems.<\/li>\n\n\n\n<li><strong>Tin plating is too thin:<\/strong> Poor welding effect affects reliability.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u2699\ufe0f <strong>4. Special coating of reflective solder tape<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/www.ray-tron.com\/en\/fanguang\/\" data-internallinksmanager029f6b8e52c=\"55\" title=\"Reflective copper tape supplier_Reflective busbar manufacturer_Reflective welding tape wholesaler manufacturer\">Reflective welding tape<\/a>:<\/strong> The plating layer is usually a silver plating layer on top of the tin layer, and adopts a rolled groove structure, which can reflect part of the light back to the battery cell and improve the photoelectric conversion efficiency of the component.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Summary: Key points for selecting photovoltaic welding ribbon materials<\/strong><\/h2>\n\n\n\n<p>\u2705 High purity oxygen-free copper substrate (T2 or C1100), conductivity \u2265 97% IACS.<br>\u2705 Choose the appropriate tin layer type (SN60PB40, SN100 or SN97AG3) according to environmental protection and welding requirements.<br>\u2705 The coating thickness is uniform and meets welding standards, ensuring that the solder joints are firm and stable.<\/p>\n\n\n\n<p>Choosing high-quality photovoltaic welding ribbons can not only improve the welding quality of photovoltaic modules, but also extend the service life of the modules!<\/p>","protected":false},"excerpt":{"rendered":"<p>Photovoltaic ribbon is usually made of high-conductivity copper as the base material and coated with a layer of suitable welding material on the surface [\u2026]<\/p>","protected":false},"author":1,"featured_media":9300,"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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