{"id":6038,"date":"2023-05-26T17:06:09","date_gmt":"2023-05-26T09:06:09","guid":{"rendered":"https:\/\/www.ray-tron.com\/?p=6038"},"modified":"2023-07-21T09:37:53","modified_gmt":"2023-07-21T01:37:53","slug":"ele5821","status":"publish","type":"post","link":"https:\/\/www.ray-tron.com\/en\/ele5821\/","title":{"rendered":"Theoretical calculation method for lithium battery tab design"},"content":{"rendered":"<p>The positive and negative terminals of a general lithium battery are connected to the negative and positive caps through internal nickel tabs (nickel-plated copper) or aluminum tabs. Of course, the design of the tabs has an important influence on the current capacity. The following introduces the tab design theory.<\/p>\n<p>1. Theoretical parameters of the lug material<\/p>\n<p>(1) The safe current carrying value of nickel tabs is 11-13A\/mm2, the conductivity of nickel is 140000 S\/cm, and the melting point is 1200\u2103\uff5e1400\u2103.<\/p>\n<p>Nickel lug current capacity table<\/p>\n<table cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td valign=\"top\" width=\"177\">Tab thickness\/mm<\/td>\n<td valign=\"top\" width=\"168\">Tab width\/mm<\/td>\n<td valign=\"top\" width=\"170\">Current capacity\/A<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"184\">0.1<\/td>\n<td valign=\"top\" width=\"168\">3<\/td>\n<td valign=\"top\" width=\"170\">3.5<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"184\">0.1<\/td>\n<td valign=\"top\" width=\"168\">4<\/td>\n<td valign=\"top\" width=\"170\">4.5<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"184\">0.1<\/td>\n<td valign=\"top\" width=\"168\">5<\/td>\n<td valign=\"top\" width=\"170\">5.5<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"184\">0.1<\/td>\n<td valign=\"top\" width=\"168\">6<\/td>\n<td valign=\"top\" width=\"170\">6.5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>(2) The safe current carrying value of the copper tab is 5-8A\/mm2, the electrical conductivity of copper is 584000 S\/cm, and the melting point is \u22481000\u2103.<\/p>\n<p>(3) The safe current carrying value of the aluminum tab is 3-5A\/mm2, the conductivity of nickel is 369000 S\/cm and the melting point is \u2248660\u2103.<\/p>\n<p>2. Theoretical design of the influence of the geometric position of the tab on impedance<\/p>\n<p>The farther the current collector (foil) is from the tab, the weaker the overcurrent;<\/p>\n<p>The average current value is half of the current collector. Simply put, the effective impedance Reff is half of the current collector impedance Ro.<\/p>\n<p>Reff = Rc\/2 or Ra\/2<\/p>\n<p>in<\/p>\n<p>\u2460 Rc is the positive current collector impedance value<\/p>\n<p>\u2461 Ra is the negative current collector impedance value<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6039 lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617045396.png\" alt=\"\" width=\"378\" height=\"113\" \/><noscript><img decoding=\"async\" class=\"alignnone size-full wp-image-6039 lazyload\" src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617045396.png\" alt=\"\" width=\"378\" height=\"113\" srcset=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617045396.png 378w, https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617045396-300x90.png 300w\" sizes=\"(max-width: 378px) 100vw, 378px\" \/><\/noscript><\/p>\n<p>(1) The pole ear is located in the middle of the pole piece<\/p>\n<p>E=\uff08I\/2\uff09^2*\uff08Ro\/4\uff09+\uff08I\/2\uff09^2*\uff08Ro\/4\uff09= I^2*\uff081\/8\uff09Ro=I^2*Reff<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6040 lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617051763.png\" alt=\"\" width=\"378\" height=\"76\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6040 lazyload\" src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617051763.png\" alt=\"\" width=\"378\" height=\"76\" srcset=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617051763.png 378w, https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617051763-300x60.png 300w\" sizes=\"(max-width: 378px) 100vw, 378px\" \/><\/noscript><\/p>\n<p>(2) The pole ear is located at 1\/3 of the pole piece<\/p>\n<p>E=\uff08I\/3\uff09^2*\uff08Ro\/6\uff09+\uff082I\/3\uff09^2*\uff082Ro\/6\uff09= I^2*\uff081\/6\uff09Ro<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6041 lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617052945.png\" alt=\"\" width=\"378\" height=\"76\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6041 lazyload\" src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617052945.png\" alt=\"\" width=\"378\" height=\"76\" srcset=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617052945.png 378w, https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617052945-300x60.png 300w\" sizes=\"(max-width: 378px) 100vw, 378px\" \/><\/noscript><\/p>\n<p>(3) The single pole ear is located at any position<\/p>\n<p>E=I^2*[x^2*x\/2+\uff081-x\uff09^2*\uff081-x\uff09\/2]Ro<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6042 lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617054776.png\" alt=\"\" width=\"378\" height=\"76\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6042 lazyload\" src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617054776.png\" alt=\"\" width=\"378\" height=\"76\" srcset=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617054776.png 378w, https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617054776-300x60.png 300w\" sizes=\"(max-width: 378px) 100vw, 378px\" \/><\/noscript><\/p>\n<p>(4) The bipolar tabs are located at any position<\/p>\n<p>E=\uff08I\/3\uff09^2*\uff08Ro\/6\uff09+\uff08I\/3\uff09^2*\uff08Ro\/6\uff09+\uff08I\/3\uff09^2*\uff08Ro\/6\uff09<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6043 lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617055658.png\" alt=\"\" width=\"378\" height=\"76\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6043 lazyload\" src=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617055658.png\" alt=\"\" width=\"378\" height=\"76\" srcset=\"https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617055658.png 378w, https:\/\/www.ray-tron.com\/wp-content\/uploads\/2023\/05\/2023052617055658-300x60.png 300w\" sizes=\"(max-width: 378px) 100vw, 378px\" \/><\/noscript><\/p>","protected":false},"excerpt":{"rendered":"<p>The positive and negative terminals of a general lithium battery are connected to the negative and positive caps through internal nickel tabs (copper-plated nickel) or aluminum tabs. Of course, the design of the tabs has an impact on the current capacity.<\/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":[253,244],"class_list":["post-6038","post","type-post","status-publish","format-standard","hentry","category-blog","tag-blog","tag-dianchijier"],"_links":{"self":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/posts\/6038","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=6038"}],"version-history":[{"count":0,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/posts\/6038\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/media?parent=6038"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/categories?post=6038"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/tags?post=6038"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}