{"id":82289,"date":"2024-01-14T13:12:20","date_gmt":"2024-01-14T13:12:20","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/pile-aaa-taille-poids-et-applications\/"},"modified":"2024-01-23T12:58:28","modified_gmt":"2024-01-23T12:58:28","slug":"pile-aaa-taille-poids-et-applications","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/fr\/pile-aaa-taille-poids-et-applications\/","title":{"rendered":"Pile AAA | Taille, poids et applications"},"content":{"rendered":"<h2>Batterie AAA : Vue d&rsquo;ensemble<\/h2>\n<p>La batterie AAA est un type de pile cylindrique \u00e0 cellule unique tr\u00e8s r\u00e9pandue. Commun\u00e9ment utilis\u00e9e dans les appareils \u00e9lectroniques portables, les jouets et les t\u00e9l\u00e9commandes, elle se d\u00e9cline en plusieurs chimies diff\u00e9rentes. La tension nominale, la capacit\u00e9 et les taux de d\u00e9charge pratiques varient selon la chimie de la cellule, mais les appareils con\u00e7us pour les piles AAA acceptent g\u00e9n\u00e9ralement des tensions de 1.2 \u00e0 1.5 V, sauf indication contraire du fabricant.<\/p>\n<h2>Types de Batteries AAA<\/h2>\n<p>Les batteries AAA se divisent en deux cat\u00e9gories principales : les piles primaires et secondaires.<\/p>\n<ul>\n<li><strong>Batterie Primaire<\/strong> : inclut les piles alcalines, au lithium m\u00e9tallique, au zinc-carbone et au zinc-chlorure.<\/li>\n<li><strong>Batterie Secondaire<\/strong> : comprend les piles NiMH (nickel-m\u00e9tal hydrure) et NiCd (nickel-cadmium).<\/li>\n<\/ul>\n<h2>Dimensions et Poids<\/h2>\n<p>Une pile AAA mesure 10,5 mm de diam\u00e8tre et 44,5 mm de longueur, avec un poids variant selon sa chimie : environ 11,5 g pour l&rsquo;alcaline, 7,6 g pour le lithium et 14 \u00e0 15 g pour la NiMH.<\/p>\n<h2>Principe de Fonctionnement<\/h2>\n<p>Un \u00e9l\u00e9ment fondamental de la pile \u00e9lectrochimique est la r\u00e9action redox spontan\u00e9e entre deux \u00e9lectrodes, s\u00e9par\u00e9es par un \u00e9lectrolyte conducteur ionique et isolant \u00e9lectriquement. Ce processus transforme l&rsquo;\u00e9nergie chimique stock\u00e9e en \u00e9nergie \u00e9lectrique, fournissant ainsi une force \u00e9lectromotrice.<\/p>\n<h2>Caract\u00e9ristiques des Batteries AAA<\/h2>\n<ul>\n<li><strong>Tension de Cellule<\/strong> : La tension est g\u00e9n\u00e9r\u00e9e par la diff\u00e9rence de potentiel des mat\u00e9riaux des \u00e9lectrodes. Pour les piles alcalines, elle est d&rsquo;environ 1.5 V.<\/li>\n<li><strong>Tension de Coupure<\/strong> : C&rsquo;est la tension minimale admissible, d\u00e9finissant l&rsquo;\u00e9tat \u00ab vide \u00bb de la batterie.<\/li>\n<li><strong>Capacit\u00e9<\/strong> : La capacit\u00e9 coulombique totale disponible lors de la d\u00e9charge d&rsquo;une batterie \u00e0 un courant sp\u00e9cifique.<\/li>\n<li><strong>Taux de C<\/strong> : Utilis\u00e9 pour exprimer la vitesse de d\u00e9charge ou de charge relative \u00e0 sa capacit\u00e9 maximale.<\/li>\n<li><strong>Auto-d\u00e9charge<\/strong> : Les batteries se d\u00e9chargent progressivement m\u00eame lorsqu&rsquo;elles ne sont pas utilis\u00e9es. Les piles alcalines perdent 2 \u00e0 3 % de leur charge originale par an \u00e0 temp\u00e9rature ambiante.<\/li>\n<li><strong>D\u00e9gradation<\/strong> : Une certaine d\u00e9gradation se produit \u00e0 chaque cycle de charge-d\u00e9charge, affectant la dur\u00e9e de vie de la batterie.<\/li>\n<\/ul>\n<h2>Chimie des Batteries Alcalines<\/h2>\n<p>Dans une batterie alcaline, l&rsquo;\u00e9lectrode n\u00e9gative est le zinc et l&rsquo;\u00e9lectrode positive est le dioxyde de mangan\u00e8se (MnO<sub>2<\/sub>). L&rsquo;\u00e9lectrolyte de hydroxyde de potassium (KOH) n&rsquo;est pas consomm\u00e9 durant la r\u00e9action. Les demi-r\u00e9actions sont :<\/p>\n<p>Zn(s) + 2OH<sup>\u2212<\/sup>(aq) \u2192 ZnO(s) + H<sub>2<\/sub>O(l) + 2e<sup>\u2212<\/sup> [E<sub>oxydation<\/sub><sup>\u00b0<\/sup> = +1.28 V]<\/p>\n<p>2MnO<sub>2<\/sub>(s) + H<sub>2<\/sub>O(l) + 2e<sup>\u2212<\/sup> \u2192 Mn<sub>2<\/sub>O<sub>3<\/sub>(s) + 2OH<sup>\u2212<\/sup>(aq) [E<sub>r\u00e9duction<\/sub><sup>\u00b0<\/sup> = +0.15 V]<\/p>\n<p>R\u00e9action globale : Zn(s) + 2MnO<sub>2<\/sub>(s) \u21cc ZnO(s) + Mn<sub>2<\/sub>O<sub>3<\/sub>(s) [e<sup>\u00b0<\/sup> = +1.43 V]<\/p>\n<h2>Autres Types de Batteries<\/h2>\n<p>Outre les batteries AAA, il existe de nombreux autres types de batteries, class\u00e9es par taille, chimie, application et tension. Parmi elles, on trouve les batteries AA, AAAA, C, D, les batteries lithium-ion, lithium-polym\u00e8re, LiFePo4, et bien d&rsquo;autres.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.electricity-magnetism.org\/wp-content\/uploads\/2022\/11\/AAA-battery-size-weight-applications-2.png\" alt=\"AAA Battery\" \/><\/p>\n<div style=\"text-align: center; font-size: 20px;\">\n    <a href=\"https:\/\/www.electricity-magnetism.org\/electric-battery\/aaa-battery\/\">Original Article<\/a>\n<\/div>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Une pile AAA est une cellule unique qui mesure 10,5 mm (0,41 po) de diam\u00e8tre et 44,5 mm (1,75 po) de longueur. La pile AAA est l\u2019un des types de piles cylindriques unicellulaires les plus courantes.<\/p>\n","protected":false},"author":1,"featured_media":5097,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","footnotes":""},"categories":[10],"tags":[],"class_list":["post-82289","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-classifiee","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 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Pile AAA | Taille, poids et applications<\/title>\n<meta name=\"description\" content=\"Une pile AAA est une cellule unique qui mesure 10,5 mm (0,41 po) de diam\u00e8tre et 44,5 mm (1,75 po) de longueur. 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