{"id":33493,"date":"2025-03-17T16:47:12","date_gmt":"2025-03-17T08:47:12","guid":{"rendered":"https:\/\/www.ray-tron.com\/?p=33493"},"modified":"2025-03-17T16:47:19","modified_gmt":"2025-03-17T08:47:19","slug":"what-are-the-differences-between-different-types-of-tin-plating-for-photovoltaic-ribbons","status":"publish","type":"post","link":"https:\/\/www.ray-tron.com\/en\/what-are-the-differences-between-different-types-of-tin-plating-for-photovoltaic-ribbons\/","title":{"rendered":"What are the differences between different types of tin plating for photovoltaic ribbons?"},"content":{"rendered":"

Photovoltaic welding ribbon<\/a>The tin plating type mainly refers to the coating composition on the surface of the solder strip. Different tin plating alloy formulas have differentPhotovoltaic modules<\/a>The welding performance, conductivity and reliability will have a significant impact.<\/p>

Common photovoltaic ribbon tinning types:<\/strong><\/h2>
Tin plating type<\/th>Ingredient ratio<\/th>Melting point<\/th>Features<\/th>Application Scenario<\/th><\/tr><\/thead>
SN60PB40<\/strong><\/td>60% Tin + 40% Lead<\/td>183-190\u2103<\/td>Strong weldability, good wettability, strong oxidation resistance<\/td>Traditional crystalline silicon photovoltaic modules<\/td><\/tr>
SN100<\/strong><\/td>99.9% pure tin<\/td>232\u2103<\/td>Environmentally friendly and lead-free, strong corrosion resistance and better conductivity<\/td>High-efficiency HJT and TOPCon batteries<\/td><\/tr>
SN62PB36AG2<\/strong><\/td>62% Tin + 36% Lead + 2% Silver<\/td>179\u2103<\/td>Excellent welding strength and strong crack resistance<\/td>High reliability photovoltaic modules<\/td><\/tr>
SN-Bi alloy<\/strong><\/td>Tin + Bismuth<\/td>140-170\u2103<\/td>Low temperature welding to prevent thermal damage to the battery cells<\/td>Flexible photovoltaic modules<\/td><\/tr>
SN-Ag alloy<\/strong><\/td>Tin+Silver<\/td>221\u2103<\/td>High conductivity, high temperature resistance<\/td>N-type photovoltaic cells<\/td><\/tr><\/tbody><\/table><\/figure>

Specific differences between various types of tin plating:<\/strong><\/h2>

\u2705 1. SN60PB40 (with lead-tin layer)<\/strong><\/h3>
  • Features<\/strong>: The most commonly used coating in traditional solder strips, containing 40% lead, with excellent soldering performance.<\/li>\n\n
  • Advantages<\/strong>: Good wettability, strong solder joints, stable soldering process and low cost.<\/li>\n\n
  • shortcoming<\/strong>: Contains lead, is not environmentally friendly, and does not comply with European RoHS environmental standards.<\/li>\n\n
  • Application Scenario<\/strong>: Traditional crystalline silicon photovoltaic cells (PERC cells).<\/li><\/ul>

    \u2705 2. SN100 (pure tin layer)<\/strong><\/h3>
    • Features<\/strong>: Made of 99.9% high purity tin, completely lead-free.<\/li>\n\n
    • Advantages<\/strong>: Strong conductivity, good oxidation resistance, strong corrosion resistance, and meets environmental protection standards.<\/li>\n\n
    • shortcoming<\/strong>: The melting point is relatively high (232\u00b0C), which requires higher string welding process.<\/li>\n\n
    • Application Scenario<\/strong>: HJT (heterojunction battery), TOPCon, IBC and other high-efficiency battery cells.<\/li><\/ul>

      \u2705 3. SN62PB36AG2 (with silver alloy plating)<\/strong><\/h3>
      • Features<\/strong>: Adding 2% silver element enhances welding strength and crack resistance.<\/li>\n\n
      • Advantages<\/strong>: Low melting point (179\u00b0C), reducing thermal damage to battery cells; strong crack resistance after welding.<\/li>\n\n
      • shortcoming<\/strong>: The cost is higher.<\/li>\n\n
      • Application Scenario<\/strong>: High-end photovoltaic modules such as N-type photovoltaic cells and bifacial cells.<\/li><\/ul>

        \u2705 4. SN-Bi (tin-bismuth alloy layer)<\/strong><\/h3>
        • Features<\/strong>: Low temperature welding, melting point is only 140-170\u2103.<\/li>\n\n
        • Advantages<\/strong>: Applicable to flexible photovoltaic modules to avoid high temperature damage to the cells.<\/li>\n\n
        • shortcoming<\/strong>: Low strength and easy to crack.<\/li>\n\n
        • Application Scenario<\/strong>: Flexible photovoltaic modules, thin-film photovoltaic cells.<\/li><\/ul>

          \u2705 5. SN-Ag (tin-silver alloy layer)<\/strong><\/h3>
          • Features<\/strong>: Formulated with silver to improve welding strength and conductivity.<\/li>\n\n
          • Advantages<\/strong>: High temperature resistance, strong oxidation resistance.<\/li>\n\n
          • shortcoming<\/strong>: The cost is higher.<\/li>\n\n
          • Application Scenario<\/strong>: N-type battery cells, TOPCon battery cells.<\/li><\/ul>

            Key factors for choosing different tin plating types<\/strong><\/h2>
            parameter<\/th>SN60PB40<\/th>SN100<\/th>SN62PB36AG2<\/th>SN-Bi<\/th>SN-Ag<\/th><\/tr><\/thead>
            Electrical conductivity<\/td>\u2605\u2605\u2605\u2606\u2606<\/td>\u2605\u2605\u2605\u2605\u2606<\/td>\u2605\u2605\u2605\u2605\u2606<\/td>\u2605\u2605\u2605\u2606\u2606<\/td>\u2605\u2605\u2605\u2605\u2605<\/td><\/tr>
            Solder Wettability<\/td>\u2605\u2605\u2605\u2605\u2605<\/td>\u2605\u2605\u2605\u2606\u2606<\/td>\u2605\u2605\u2605\u2605\u2605<\/td>\u2605\u2605\u2605\u2606\u2606<\/td>\u2605\u2605\u2605\u2605\u2605<\/td><\/tr>
            Antioxidant<\/td>\u2605\u2605\u2605\u2606\u2606<\/td>\u2605\u2605\u2605\u2605\u2606<\/td>\u2605\u2605\u2605\u2605\u2606<\/td>\u2605\u2605\u2605\u2606\u2606<\/td>\u2605\u2605\u2605\u2605\u2605<\/td><\/tr>
            Environmental protection<\/td>\u2606\u2606\u2606\u2606\u2606<\/td>\u2605\u2605\u2605\u2605\u2605<\/td>\u2605\u2606\u2606\u2606\u2606<\/td>\u2605\u2605\u2605\u2605\u2605<\/td>\u2605\u2605\u2605\u2605\u2605<\/td><\/tr>
            cost<\/td>\u2605\u2605\u2605\u2606\u2606<\/td>\u2605\u2605\u2605\u2606\u2606<\/td>\u2605\u2605\u2605\u2605\u2606<\/td>\u2605\u2605\u2605\u2606\u2606<\/td>\u2605\u2605\u2605\u2605\u2605<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"

            The tin plating type of photovoltaic solder strip mainly refers to the coating composition on the surface of the solder strip. Different tin plating alloy formulas will have an impact on the welding performance, conductivity and reliability of photovoltaic modules.<\/p>","protected":false},"author":1,"featured_media":9299,"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 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-33493","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/posts\/33493","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=33493"}],"version-history":[{"count":0,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/posts\/33493\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/media\/9299"}],"wp:attachment":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/media?parent=33493"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/categories?post=33493"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/tags?post=33493"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}