{"id":5372,"date":"2023-03-16T16:49:55","date_gmt":"2023-03-16T08:49:55","guid":{"rendered":"https:\/\/www.ray-tron.com\/?p=5372"},"modified":"2023-09-01T13:40:50","modified_gmt":"2023-09-01T05:40:50","slug":"01005-2","status":"publish","type":"post","link":"https:\/\/www.ray-tron.com\/en\/01005-2\/","title":{"rendered":"What is the material 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>Every mainstream<a href=\"https:\/\/www.ray-tron.com\/en\/\" data-internallinksmanager029f6b8e52c=\"15\" title=\"Solar panels\">Solar Cells<\/a>An important component of the board, photovoltaic welding ribbon is also called tinned copper strip, with a width of 1-6mm, a thickness of 0.08-0.5mm, and a flux coating thickness of 10-30\u03bcM.<\/p><p>Application<a href=\"https:\/\/www.ray-tron.com\/en\/\" data-internallinksmanager029f6b8e52c=\"14\" title=\"Photovoltaic modules\">Photovoltaic modules<\/a>There are two forms of photovoltaic welding rods: interconnecting bars and bus bars. In typical silicon solar cells, both interconnecting bars and bus bars are required.<\/p>\r\n<p>Interconnect bars can be soldered directly onto silicon crystals to connect the solar cells in a solar panel to each other. The interconnect bars carry the electricity generated by the solar cells to the<a href=\"https:\/\/www.ray-tron.com\/en\/pvbusbar\/\" data-internallinksmanager029f6b8e52c=\"90\" title=\"Photovoltaic busbar supplier_Solar busbar manufacturer_Photovoltaic busbar wholesaler\">Photovoltaic busbar<\/a>PV busbars are hot-dip tinned copper conductors installed around the perimeter of the solar panel. PV busbars connect the interconnects to the junction box. Thin-film solar panels generally only require busbars.<\/p><figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-5390 aligncenter lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/2-1.jpg\" alt=\"\" \/><noscript><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"533\" class=\"wp-image-5390 aligncenter lazyload\" src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/2-1.jpg\" alt=\"\" srcset=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/2-1.jpg 800w, https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/2-1-300x200.jpg 300w, https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/2-1-768x512.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/noscript><\/figure><p><\/p>\r\n<p>Photovoltaic welding rods are key components of solar panels and are an important factor in improving the efficiency and durability of solar panels. Only when high-quality photovoltaic welding rods are properly installed on solar panels can the high efficiency and durability of solar panels be achieved.<\/p><p>High-quality photovoltaic ribbons can also improve the production efficiency of solar panels and reduce scrap rates. The quality of photovoltaic ribbons and their welding to solar cells is an important factor in ensuring the efficiency and durability of solar panels.<\/p><p>1. At present, photovoltaic welding strips on the market are mainly divided into silver-containing welding strips and silver-free welding strips. In addition to being expensive, silver-containing welding rods also have their own advantages.<\/p><p>1) Improve the metallurgical bonding between solder and the metal being welded. After welding, the mechanical strength and electrical conductivity will be better.<\/p>\r\n<p>2) After adding silver, the melting point of the ternary alloy is lower than that of the binary alloy, and its weldability and fluidity are improved.<\/p><p>3) The resistivity will decrease and the high temperature resistance will increase.<\/p><p>2. The resistance of the soldering strip is mainly determined by the size and specifications of the soldering strip itself and the material of the copper substrate. The composition of the tin coating on the surface will not have a significant effect on the resistance of the soldering strip.<\/p><p>Increasing the width or thickness of the solder ribbon can reduce the resistance of the ribbon. This improvement works equally well in traditional soldering methods and new low-temperature connection methods (such as conductive silver glue or conductive ribbon connection).<\/p><p>However, a welding rod wider than the front electrode width will block the incident light and cause current loss. We recommend using thicker PV ribbons without affecting the wafer yield.<\/p><figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-5391 aligncenter lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/3-1.jpg\" alt=\"\" \/><noscript><img decoding=\"async\" width=\"800\" height=\"533\" class=\"wp-image-5391 aligncenter lazyload\" src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/3-1.jpg\" alt=\"\" srcset=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/3-1.jpg 800w, https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/3-1-300x200.jpg 300w, https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/3-1-768x512.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/noscript><\/figure><p>3. Solar cells covered by photovoltaic ribbons cannot absorb sunlight, so<a href=\"https:\/\/www.ray-tron.com\/en\/\" data-internallinksmanager029f6b8e52c=\"19\" title=\"Ruichuang 2\">Raytron<\/a>Also launched<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>, or<a href=\"https:\/\/www.ray-tron.com\/en\/buguang\/\" data-internallinksmanager029f6b8e52c=\"54\" title=\"Light-catching welding tape supplier_light-catching copper tape manufacturer_light-catching busbar manufacturer wholesaler\">Light-catching welding strip<\/a>The front of the reflective ribbon is a silver-plated and rolled longitudinal groove structure, which can reflect the light incident on the reflective ribbon to the inner surface of the glass layer of the component at a certain angle, and project it to the surface of the cell after being completely reflected at the glass-air interface. The captured light can enable the component to generate additional power, which can theoretically increase the efficiency of the component by about 2%.<\/p><p>4. Key quality parameters of photovoltaic ribbons<\/p><p>The performance indicators of photovoltaic welding ribbons are important in themselves. The type and purity of copper determine the conductivity of the material and the maximum softness of the welding rod. The composition of the flux, the thickness of the covering layer and the composition of the covering affect the quality of the solder joint and thus the durability of the solar panel.<\/p><p>High ductility of PV ribbons is important to prevent failure of the solder joints between the bus ribbon and the interconnector. Such failures can occur due to extension\/tension caused by temperature oscillations during solar panel operation.<\/p>\r\n<p>The solder joints are put to the test during the service life of a solar panel (25 years on average) by constant and sometimes particularly violent temperature fluctuations.<\/p><figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-5392 aligncenter lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/4.jpg\" alt=\"\" \/><noscript><img decoding=\"async\" width=\"800\" height=\"533\" class=\"wp-image-5392 aligncenter lazyload\" src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/4.jpg\" alt=\"\" srcset=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/4.jpg 800w, https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/4-300x200.jpg 300w, https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/03\/4-768x512.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/noscript><\/figure><p>Two parameters that are critical to most PV ribbon manufacturers are bend and yield strength. Many PV ribbon manufacturers find it difficult to achieve a high level of ribbon flexibility while ensuring its straightness.<\/p><p>Achieving adequate flexibility and low curvature can mean the difference between winning and losing a supply contract. Therefore, manufacturers must strive to improve their rolling, annealing, tinning and material handling techniques to meet the ever-increasing requirements of product performance indicators.<\/p><p>Therefore, the impact of photovoltaic ribbons on module power generation lies not only in the design materials of the photovoltaic ribbons themselves, but also in the selection of photovoltaic ribbons, lamination process and quality control of welding rod production. We need to understand photovoltaic ribbons from all aspects, although the industry may pay more attention to packaging materials and solar cells.<\/p>","protected":false},"excerpt":{"rendered":"<p>Photovoltaic welding ribbon is an important component of every mainstream solar panel. Photovoltaic welding ribbon is also called tinned copper strip. It has a width of 1-6mm and a thickness of 0.08-0.5mm.<\/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-5372","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\/5372","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=5372"}],"version-history":[{"count":0,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/posts\/5372\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/media?parent=5372"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/categories?post=5372"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/tags?post=5372"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}