{"id":80564,"date":"2024-01-14T13:10:01","date_gmt":"2024-01-14T13:10:01","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/baterias-a-base-de-niquel-caracteristicas-e-aplicacoes\/"},"modified":"2024-01-20T09:53:09","modified_gmt":"2024-01-20T09:53:09","slug":"baterias-a-base-de-niquel-caracteristicas-e-aplicacoes","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/pt-br\/baterias-a-base-de-niquel-caracteristicas-e-aplicacoes\/","title":{"rendered":"Baterias \u00e0 base de n\u00edquel | Caracter\u00edsticas e aplica\u00e7\u00f5es"},"content":{"rendered":"<h2>Baterias \u00e0 Base de N\u00edquel: Evolu\u00e7\u00e3o e Aplica\u00e7\u00f5es<\/h2>\n<p>As baterias \u00e0 base de n\u00edquel foram uma das mais comuns no s\u00e9culo passado, sendo amplamente utilizadas em dispositivos port\u00e1teis. O uso de n\u00edquel nesses dispositivos oferece maior densidade energ\u00e9tica e maior capacidade de armazenamento a um custo mais baixo. Apesar da emerg\u00eancia de novos tipos de baterias tornando o mercado global mais competitivo, as baterias \u00e0 base de n\u00edquel ainda s\u00e3o amplamente utilizadas em diversas aplica\u00e7\u00f5es.<\/p>\n<h2>Principais Tipos de Baterias \u00e0 Base de N\u00edquel<\/h2>\n<p>Existem dois tipos principais de baterias \u00e0 base de n\u00edquel: as baterias de N\u00edquel-Metal Hidreto (NiMH) e as baterias de N\u00edquel-C\u00e1dmio (NiCd). Al\u00e9m disso, o n\u00edquel \u00e9 extensivamente utilizado em baterias de \u00edon de l\u00edtio, com dois dos tipos mais comuns, N\u00edquel Cobalto Alum\u00ednio (NCA) e N\u00edquel Mangan\u00eas Cobalto (NMC), usando 80% e 33% de n\u00edquel, respectivamente. As formula\u00e7\u00f5es mais recentes de NMC est\u00e3o se aproximando de 80% de n\u00edquel.<\/p>\n<h2>Bateria de N\u00edquel-Metal Hidreto (NiMH)<\/h2>\n<p>A bateria NiMH, introduzida comercialmente em 1989, \u00e9 uma bateria recarreg\u00e1vel com eletrodo positivo de hidr\u00f3xido de n\u00edquel e eletrodo negativo de hidreto met\u00e1lico. Tornou-se popular em ve\u00edculos el\u00e9tricos h\u00edbridos, representando 10% do mercado total de baterias recarreg\u00e1veis. Comparativamente \u00e0s baterias NiCd, as NiMH oferecem 40% mais energia espec\u00edfica, resultando em aproximadamente o dobro da capacidade. S\u00e3o menos afetadas pela depress\u00e3o de tens\u00e3o e n\u00e3o cont\u00eam c\u00e1dmio t\u00f3xico. Al\u00e9m disso, apresentam menor efeito de mem\u00f3ria e menor resist\u00eancia interna do que as baterias alcalinas.<\/p>\n<h2>Bateria de N\u00edquel-C\u00e1dmio (NiCd)<\/h2>\n<p>A bateria Ni-Cd, usando \u00f3xido de hidr\u00f3xido de n\u00edquel como c\u00e1todo e c\u00e1dmio met\u00e1lico como \u00e2nodo, tem baixa imped\u00e2ncia interna e alta capacidade de fornecer energia, mas uma capacidade de armazenamento de energia menor em compara\u00e7\u00e3o com outros sistemas. Seu maior inconveniente \u00e9 o conte\u00fado de c\u00e1dmio, que \u00e9 extremamente t\u00f3xico. S\u00e3o utilizadas principalmente em dispositivos port\u00e1teis de pequeno porte, como ferramentas el\u00e9tricas e brinquedos.<\/p>\n<h2>Caracter\u00edsticas das Baterias NiMH<\/h2>\n<ul>\n<li><strong>Tens\u00e3o de C\u00e9lula:<\/strong> As baterias NiMH t\u00eam uma tens\u00e3o de circuito aberto comum de 1,2V.<\/li>\n<li><strong>Tens\u00e3o de Corte:<\/strong> O corte de tens\u00e3o, definindo o estado &#8220;vazio&#8221; da bateria, \u00e9 normalmente de 1,0 V por c\u00e9lula para NiMH e NiCd.<\/li>\n<li><strong>Capacidade:<\/strong> As baterias NiMH AA possuem uma capacidade nominal de 2000-2700 mAh, enquanto as Ni-Cd AA t\u00eam entre 600-1000 mAh.<\/li>\n<li><strong>Taxa C:<\/strong> As baterias NiMH de alta taxa C podem ser carregadas a 1C e totalmente carregadas em pouco mais de uma hora.<\/li>\n<li><strong>Auto-descarga:<\/strong> As baterias NiMH t\u00eam alta auto-descarga, podendo perder at\u00e9 20% de sua carga nas primeiras 24 horas.<\/li>\n<\/ul>\n<h2>Por Que as Baterias Alcalinas S\u00e3o 1,5V Enquanto as \u00e0 Base de N\u00edquel S\u00e3o 1,2V?<\/h2>\n<p>As baterias alcalinas come\u00e7am com 1,5 volts e caem para 1,2 volts, continuando at\u00e9 1,0 volt, onde o aparelho para de funcionar. J\u00e1 as c\u00e9lulas secund\u00e1rias operam mais uniformemente, mesmo com apenas 1,2 volts. Isso se deve \u00e0 sua qu\u00edmica diferente. As c\u00e9lulas secund\u00e1rias t\u00eam descarga plana, mantendo-se em 1,2 volts at\u00e9 serem esgotadas e, em seguida, caindo rapidamente para abaixo de 1,0 volt. Dispositivos eletr\u00f4nicos geralmente s\u00e3o feitos para funcionar com tens\u00f5es de c\u00e9lula de 1,0 a 1,5 volts, portanto, baterias alcalinas e recarreg\u00e1veis se comportam de maneira semelhante.<\/p>\n<h2>Outros Tipos de Baterias<\/h2>\n<p>Existem v\u00e1rios outros tipos de baterias, classificadas por tamanho, qu\u00edmica, aplica\u00e7\u00e3o e tens\u00e3o. Entre elas, destacam-se as baterias de l\u00edtio-\u00edon, l\u00edtio-pol\u00edmero, l\u00edtio cobalto \u00f3xido e l\u00edtio mangan\u00eas \u00f3xido, al\u00e9m das baterias de chumbo-\u00e1cido e de gel, cada uma com suas caracter\u00edsticas e aplica\u00e7\u00f5es espec\u00edficas.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.electricity-magnetism.org\/wp-content\/uploads\/2022\/10\/Nickel-based-batteries-characteristics.png\" alt=\"\" \/><\/p>\n<div style=\"text-align: center; font-size: 20px;\">\n    <a href=\"https:\/\/www.electricity-magnetism.org\/electric-battery\/nickel-based-batteries\/\">Original Article<\/a>\n<\/div>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>As baterias \u00e0 base de n\u00edquel foram uma das baterias mais comuns no s\u00e9culo passado e foram usadas em quase todos os dispositivos port\u00e1teis da \u00e9poca.<\/p>\n","protected":false},"author":1,"featured_media":4531,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","footnotes":""},"categories":[14],"tags":[],"class_list":["post-80564","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nao-categorizado","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - 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