{"id":5396,"date":"2023-03-17T15:33:45","date_gmt":"2023-03-17T07:33:45","guid":{"rendered":"https:\/\/www.ray-tron.com\/?p=5396"},"modified":"2023-09-01T13:40:24","modified_gmt":"2023-09-01T05:40:24","slug":"ele5362","status":"publish","type":"post","link":"https:\/\/www.ray-tron.com\/en\/ele5362\/","title":{"rendered":"What is the role 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, used for interconnection of solar cells and providing connection to the junction box. Photovoltaic welding rods are tinned copper strips 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 rods and<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>In a typical silicon solar cell, both are needed.<\/p><p>Interconnect bars are soldered directly onto the silicon crystals to connect the solar cells in a solar panel to each other. Interconnect bars carry the current generated by the solar cells to the PV bus ribbons. PV bus ribbons are hot-dip tinned copper conductors installed around the periphery of the solar panel. PV bus ribbons connect the interconnect bars to the junction box. Thin-film solar panels generally only require bus ribbons.<\/p><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 welding rods can also improve the production efficiency of solar panels and reduce the scrap rate. The quality of photovoltaic welding rods and their welding with solar cells are important factors in ensuring the efficiency and durability of solar panels.<\/p><p>1. At present, the welding rods on the market are mainly divided into silver-containing welding rods and silver-free welding rods. 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><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>\r\n<figure id=\"attachment_7264\" aria-describedby=\"caption-attachment-7264\" style=\"width: 450px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-7264 lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/06\/2023060615122772.jpg\" alt=\"Photovoltaic busbar manufacturer\" width=\"450\" height=\"300\" \/><figcaption id=\"caption-attachment-7264\" class=\"wp-caption-text\"><noscript><img decoding=\"async\" class=\"size-full wp-image-7264 lazyload\" src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/06\/2023060615122772.jpg\" alt=\"Photovoltaic busbar manufacturer\" width=\"450\" height=\"300\" srcset=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/06\/2023060615122772.jpg 450w, https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/06\/2023060615122772-300x200.jpg 300w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/><\/noscript> <a href=\"https:\/\/www.ray-tron.com\/en\/pvbusbar\/\" data-internallinksmanager029f6b8e52c=\"20\" title=\"Photovoltaic busbar supplier_Solar busbar manufacturer_Photovoltaic busbar wholesaler\">Photovoltaic busbar manufacturer<\/a><\/figcaption><\/figure><p>2. The resistance of the welding rod is mainly determined by the size and specifications of the welding rod 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 welding rod.<\/p><p>Increasing the width or thickness of the solder rod can reduce the resistance of the solder rod. This improvement works equally well in traditional soldering methods and new low-temperature joining methods (such as conductive silver glue or conductive ribbon joining).<\/p><p>However, electrodes wider than the front electrode width will block the incident light and cause current loss. We recommend using thicker electrodes without affecting the film yield.<\/p><p>3. The solar cell covered by the welding rod cannot absorb sunlight. Some welding rod companies have launched reflective welding rods. The front of the welding rod is a silver-plated and rolled longitudinal groove structure.<\/p><p>This structure can reflect the light incident on the welding rod to the inner surface of the glass layer of the component at a certain angle, and project it onto 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, theoretically increasing the efficiency of the component by about 2%.<\/p><p>4. Key quality parameters of photovoltaic welding rods<\/p><p>The performance indicators of photovoltaic welding rods 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 welding rods is very important to prevent failure of the solder joints between the busbars and the interconnector bars. Such failures can occur due to extension\/tension caused by temperature oscillations during solar panel operation.<\/p><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 extremely intense temperature fluctuations.<\/p><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 welding rods on module power generation lies not only in the design materials of the welding rods themselves, but also in the selection of welding rods, lamination process and quality control of welding rod production. We need to understand welding rods from all aspects, although the industry may pay more attention to packaging materials and solar cells.<\/p>","protected":false},"excerpt":{"rendered":"<p>Photovoltaic ribbon is an important component of every mainstream solar panel, used to interconnect solar cells and provide connections to the junction box. Photovoltaic welding rod is a tinned copper strip, wide [\u2026]<\/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-5396","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\/5396","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=5396"}],"version-history":[{"count":0,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/posts\/5396\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/media?parent=5396"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/categories?post=5396"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/tags?post=5396"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}