{"id":30599,"date":"2024-12-25T17:06:53","date_gmt":"2024-12-25T09:06:53","guid":{"rendered":"https:\/\/www.ray-tron.com\/?p=30599"},"modified":"2024-12-25T17:06:53","modified_gmt":"2024-12-25T09:06:53","slug":"clc0095","status":"publish","type":"post","link":"https:\/\/www.ray-tron.com\/en\/clc0095\/","title":{"rendered":"What are the requirements for the substrate 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>The base material is mainly copper (or copper alloy), because copper has good conductivity, which can ensure that the current is<a href=\"https:\/\/www.ray-tron.com\/en\/\" data-internallinksmanager029f6b8e52c=\"14\" title=\"Photovoltaic modules\">Photovoltaic modules<\/a>The quality and characteristics of the copper substrate directly affect the electrical performance, mechanical strength and corrosion resistance of the photovoltaic ribbon, thereby affecting the efficiency and life of the entire photovoltaic module. In order to ensure that the photovoltaic ribbon can work stably in the photovoltaic module for a long time, the substrate needs to meet the following key requirements:<\/p>\n<h3>1. <strong>Good electrical conductivity<\/strong><\/h3>\n<p>Copper is the most commonly used substrate for photovoltaic ribbons because it has very excellent electrical conductivity. Good conductivity means that current can be efficiently transmitted through the ribbon, reducing power losses and improving the overall efficiency of photovoltaic modules. Copper&#039;s conductivity is about 97% of silver, but the cost is lower, so it is widely used in photovoltaic ribbons.<\/p>\n<ul>\n<li><strong>Require<\/strong>: The electrical conductivity of the copper substrate must be high, and the electrical conductivity of copper is usually required to reach 100% IACS (International Copper Standard).<\/li>\n<\/ul>\n<h3>2. <strong>High mechanical strength<\/strong><\/h3>\n<p>Photovoltaic welding ribbons not only need to have good electrical conductivity, but also need sufficient mechanical strength to ensure that the welding ribbons are not easily broken, deformed or damaged during use. The welding ribbons need to undergo high-temperature welding and bending during the production of photovoltaic panels, so the mechanical strength of the base material is very important.<\/p>\n<ul>\n<li><strong>Require<\/strong>\uff1aThe copper substrate needs to have high tensile strength and fatigue resistance. The yield strength of copper is usually required to be no less than 200MPa.<\/li>\n<\/ul>\n<h3>3. <strong>Corrosion resistance<\/strong><\/h3>\n<p>Photovoltaic ribbons are usually used in outdoor environments and are exposed to ultraviolet rays, rain and moisture in the air for a long time, so the corrosion resistance of the substrate is very critical. If the surface of the ribbon or the substrate is corroded, it may lead to increased resistance and poor contact, which will eventually affect the long-term stability and power generation efficiency of the photovoltaic module.<\/p>\n<ul>\n<li><strong>Require<\/strong>\uff1aThe copper substrate needs to have good corrosion resistance, especially in a humid and salty environment. Usually, the copper surface is treated with tin plating, silver plating, etc. to improve its corrosion resistance.<\/li>\n<\/ul>\n<h3>4. <strong>Good welding performance<\/strong><\/h3>\n<p>The base material of photovoltaic welding ribbon needs to have good welding performance and be able to connect well with the battery cell and other photovoltaic module materials. The welding process is a key link in the use of photovoltaic welding ribbon. The quality of the welding point directly affects the current conduction efficiency and contact resistance.<\/p>\n<ul>\n<li><strong>Require<\/strong>\uff1aThe substrate needs to be easy to solder at low temperature, and can ensure that the contact resistance after welding is small and the welding point is firm. The copper substrate generally needs to be surface treated (such as tin plating) to improve the welding performance.<\/li>\n<\/ul>\n<figure id=\"attachment_30600\" aria-describedby=\"caption-attachment-30600\" style=\"width: 500px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-30600 lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2024\/12\/20241225170610100.jpg\" alt=\"\" width=\"500\" height=\"666\" \/><figcaption id=\"caption-attachment-30600\" class=\"wp-caption-text\"><noscript><img decoding=\"async\" class=\"size-full wp-image-30600 lazyload\" src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2024\/12\/20241225170610100.jpg\" alt=\"\" width=\"500\" height=\"666\" srcset=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2024\/12\/20241225170610100.jpg 500w, https:\/\/www.ray-tron.com\/wp-content\/uploads\/2024\/12\/20241225170610100-225x300.jpg 225w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/noscript> Photovoltaic welding ribbon<\/figcaption><\/figure>\n<h3>5. <strong>Proper flexibility<\/strong><\/h3>\n<p>Photovoltaic ribbons need to have appropriate flexibility so that they are not easily broken or damaged when welding the cells during the manufacturing process. Especially in automated production processes, photovoltaic ribbons need to be able to withstand a certain amount of mechanical stretching or bending without losing their original conductivity.<\/p>\n<ul>\n<li><strong>Require<\/strong>\uff1aThe base material needs to have appropriate ductility and flexibility to ensure that it will not break during welding and installation. The copper base material is usually alloyed to improve its flexibility.<\/li>\n<\/ul>\n<h3>6. <strong>Appropriate thickness and surface flatness<\/strong><\/h3>\n<p>The substrate of photovoltaic welding ribbon needs to have consistent thickness and surface flatness, which is crucial to improving welding quality and current conduction efficiency. Uneven thickness or uneven surface of welding ribbon may lead to poor welding or poor contact, affecting the performance of the entire photovoltaic module.<\/p>\n<ul>\n<li><strong>Require<\/strong>: The thickness of the copper substrate needs to be uniform and the surface needs to be smooth without obvious defects in order to achieve good welding quality.<\/li>\n<\/ul>\n<h3>7. <strong>Good high temperature resistance<\/strong><\/h3>\n<p>Photovoltaic welding ribbons will face large temperature fluctuations during long-term use, especially<a href=\"https:\/\/www.ray-tron.com\/en\/\" data-internallinksmanager029f6b8e52c=\"15\" title=\"Solar panels\">Solar Cells<\/a>When the board is exposed to strong sunlight, the surface temperature of the component will rise significantly. The substrate needs to be able to maintain good electrical properties and mechanical strength under high temperature conditions to avoid performance degradation due to problems such as thermal expansion.<\/p>\n<ul>\n<li><strong>Require<\/strong>\uff1aThe substrate should be able to withstand long-term high temperatures and maintain a low temperature coefficient to avoid excessive resistance in high temperature environments, which would affect current transmission.<\/li>\n<\/ul>\n<h3>8. <strong>Adapt to different environmental conditions<\/strong><\/h3>\n<p>Photovoltaic ribbons need to work stably under various environmental conditions, including high temperature, low temperature, moisture, ultraviolet light, salt spray, etc. In order to ensure the stability of the ribbons in these environments, the copper substrate needs to have a certain durability.<\/p>\n<ul>\n<li><strong>Require<\/strong>: The copper substrate needs to have high environmental adaptability, especially when exposed to outdoor environment for a long time, the welding strip is required to have strong weather resistance.<\/li>\n<\/ul>\n<h3>Summarize<\/h3>\n<p>The base material requirements of photovoltaic welding ribbons are very high, mainly including good conductivity, high mechanical strength, corrosion resistance, excellent welding performance, appropriate flexibility, uniform thickness and good high temperature tolerance. These characteristics not only ensure the current transmission efficiency of the welding ribbon in the photovoltaic panel, but also effectively extend the service life of the photovoltaic module and improve its long-term stability. Therefore, selecting a suitable copper substrate and performing appropriate surface treatment on it can improve the overall performance of the photovoltaic welding ribbon and further enhance the efficiency and reliability of the photovoltaic module.<\/p>","protected":false},"excerpt":{"rendered":"<p>The substrate of photovoltaic welding ribbon is mainly copper substrate (or copper alloy), because copper has good conductivity, which can ensure the efficient transmission of current in photovoltaic modules. The copper substrate [\u2026]<\/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":"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":[],"class_list":["post-30599","post","type-post","status-publish","format-standard","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/posts\/30599","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=30599"}],"version-history":[{"count":0,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/posts\/30599\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/media?parent=30599"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/categories?post=30599"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/tags?post=30599"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}