{"id":5562,"date":"2023-03-31T16:23:06","date_gmt":"2023-03-31T08:23:06","guid":{"rendered":"https:\/\/www.ray-tron.com\/?p=5562"},"modified":"2023-09-01T13:50:40","modified_gmt":"2023-09-01T05:50:40","slug":"ele5703","status":"publish","type":"post","link":"https:\/\/www.ray-tron.com\/en\/ele5703\/","title":{"rendered":"How to classify photovoltaic welding ribbon projects"},"content":{"rendered":"<p>Welding strip in<a href=\"https:\/\/www.ray-tron.com\/en\/\" data-internallinksmanager029f6b8e52c=\"14\" title=\"Photovoltaic modules\">Photovoltaic modules<\/a>In applications, they are mainly divided into interconnection strips and busbars. Interconnection strips mainly include conventional flat strips, MBB strips, low temperature strips, low resistance strips, special-shaped strips, etc.; busbars mainly include conventional busbars, perforated strips, black strips, curved strips, etc. At present, the mainstream on the market<a href=\"https:\/\/www.ray-tron.com\/en\/pvribbon\/\" data-internallinksmanager029f6b8e52c=\"43\" title=\"Photovoltaic welding ribbon\">Photovoltaic welding ribbon<\/a>The product is an MBB welding ribbon for multi-grid components, with a diameter of 0.28~0.35mm, which is thinner than the previous 5BB conventional flat welding ribbon. It is beneficial to reduce the shading of the battery cells and make more effective use of sunlight. At the same time, it increases the number of main grids, which is beneficial to shorten the lateral current collection path of the battery cells, reduce the series resistance, and reduce the power loss of the battery cells.<\/p>\n<p>Photovoltaic welding ribbon consists of substrate and surface coating:<\/p>\n<p>(1) The base material is copper of different specifications, which requires precise specifications, good conductivity and certain strength;<\/p>\n<p>(2) The surface coating can be made by special processes such as electroplating, vacuum deposition, spraying or hot-dip plating, and the coating materials such as tin alloy can be evenly wrapped on the surface of the copper substrate with a certain composition ratio and thickness. Since the copper substrate itself does not have good welding performance, the main function of the tin alloy layer is to make the photovoltaic strip meet the weldability and firmly weld the photovoltaic strip to the main grid of the battery, thereby playing a good role in guiding current.<\/p>\n<p>Photovoltaic<a href=\"https:\/\/www.ray-tron.com\/en\/duxitongdai\/\" data-internallinksmanager029f6b8e52c=\"164\" title=\"Tinned copper strip supplier_Tinned copper strip manufacturer_Tinned copper strip wholesaler manufacturer\">Tinned copper strip<\/a>It is generally composed of copper as the main substrate and tin alloy coating.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-5563 aligncenter lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/2023033116225775.jpg\" alt=\"\" width=\"600\" height=\"400\" \/><noscript><img decoding=\"async\" class=\"alignnone size-full wp-image-5563 aligncenter lazyload\" src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/2023033116225775.jpg\" alt=\"\" width=\"600\" height=\"400\" srcset=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/2023033116225775.jpg 600w, https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/2023033116225775-300x200.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/noscript><\/p>\n<p><strong>Lead content of tinned copper strip<\/strong><\/p>\n<p>Copper base: imported refined strong oxygen-free copper\/T2 copper, copper content \u226599.99%, conductivity \u226598%.<\/p>\n<p>Copper-based resistivity: oxygen-free copper \u2264 0.0165\u03a9mm2\/m T2 copper \u2264 0.0172\u03a9mm2\/m<\/p>\n<p>Coating composition: 63%Sn37%Pb, 60%Sn40%Pb (optional)<\/p>\n<p>Coating thickness: single-sided coating 0.01~0.05mm, uniform coating, bright and smooth surface<\/p>\n<p>Coating melting point: 183\u2103, 190\u2103<\/p>\n<p>Tensile strength: soft state \u2265 25kgf\/\u33a1 semi-soft state \u2265 30kgf\/\u33a1<\/p>\n<p>Welding strip elongation: soft state \u226535% 3\/4 soft state \u226525% 1\/2 soft state \u226515% Width error: \u00b10.1mm<\/p>\n<p>Thickness error: interconnecting strip is \u00b10.01mm, settlement strip is \u00b10.015mm<\/p>\n<p><strong>Lead-silver-tin-plated copper strip (higher cost)<\/strong><\/p>\n<p>Copper base: imported refined strong oxygen-free copper\/T2 copper, copper content \u226599.99%, conductivity \u226598%.<\/p>\n<p>Copper-based resistivity: oxygen-free copper \u2264 0.0165\u03a9mm2 \/ m T2 copper \u2264 0.0172\u03a9mm2 \/ m<\/p>\n<p>Coating composition: 63%Sn35%Pb2%Ag (optional)<\/p>\n<p>Coating thickness: single-sided coating is 0.01~0.05mm, the coating is uniform, and the surface is bright and smooth.<\/p>\n<p>Coating melting point: 179\u00b0C.<\/p>\n<p>Tensile strength: soft state \u226525kgf\/\u33a1, semi-soft state \u226530kgf\/\u33a1.<\/p>\n<p>Welding strip elongation: soft state \u226535% 3\/4 soft state \u226525% 1\/2 soft state \u226515<\/p>\n<p>Width error: \u00b10.1mm<\/p>\n<p>Thickness error: interconnecting strip is \u00b10.01mm, converging strip is \u00b10.015mm<\/p>\n<p><strong>Advantages of silver solder strips:<\/strong><\/p>\n<p>Increase the metallurgical bond between the solder and the metal being welded. The mechanical strength and electrical conductivity after welding will be better;<\/p>\n<p>After adding silver, the melting point of the ternary alloy is slightly lower than that of the binary alloy, and its solderability and fluidity are improved;<\/p>\n<p>The resistivity will decrease and the high temperature resistance will increase.<\/p>\n<p>Lead-free environmentally friendly tinned copper strip<\/p>\n<p>Copper base: imported refined strong oxygen-free copper\/T2 copper, copper content \u226599.99%, conductivity \u226598%.<\/p>\n<p>Copper-based resistivity: oxygen-free copper \u2264 0.0165\u03a9mm2 \/ m T2 copper \u2264 0.0172\u03a9mm2 \/ m<\/p>\n<p>Coating composition: 96.5%Sn3.0Ag0.5%Cu, 96.5%Sn3.5Ag (optional).<\/p>\n<p>Coating thickness: single-sided coating 0.01-0.05mm, uniform coating, bright and smooth surface<\/p>\n<p>Coating melting point: 217\u2103, 221\u2103.<\/p>\n<p>Tensile strength: soft state \u2265 25kgf\/\u33a1 semi-soft state \u2265 30kgf\/\u33a1<\/p>\n<p>Welding strip elongation: soft state \u226535% 3\/4 soft state \u226525% 1\/2 soft state \u226515<\/p>\n<p>Width error: \u00b10.1mm<\/p>\n<p>Thickness error: interconnecting strip \u00b10.01mm, converging strip \u00b10.015mm<\/p>","protected":false},"excerpt":{"rendered":"<p>In photovoltaic module applications, welding ribbons are mainly divided into interconnection ribbons and busbar ribbons. Interconnection ribbons mainly include conventional flat ribbons, MBB ribbons, low-temperature ribbons, low-resistance ribbons, special-shaped ribbons, etc.; busbar ribbons mainly include conventional busbar ribbons, perforated ribbons, black ribbons, curved ribbons, etc.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"","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":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[19],"tags":[253,227],"class_list":["post-5562","post","type-post","status-publish","format-standard","hentry","category-blog","tag-blog","tag-guangfuhandai"],"_links":{"self":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/posts\/5562","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/comments?post=5562"}],"version-history":[{"count":0,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/posts\/5562\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/media?parent=5562"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/categories?post=5562"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/tags?post=5562"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}