{"id":23746,"date":"2013-01-25T10:52:33","date_gmt":"2013-01-25T10:52:33","guid":{"rendered":"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/?p=23746"},"modified":"2013-02-17T07:19:10","modified_gmt":"2013-02-17T07:19:10","slug":"un-examen-approfondi-dune-batterie-incertaine","status":"publish","type":"post","link":"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2013\/01\/25\/un-examen-approfondi-dune-batterie-incertaine\/","title":{"rendered":"Un examen approfondi d&rsquo;une batterie incertaine"},"content":{"rendered":"<p>Dans le cadre de l&rsquo;enqu\u00eate am\u00e9ricaine sur les incidents de batteries ayant perturb\u00e9 les r\u00e9cents vols du Boeing 787, il est int\u00e9ressant de consulter l&rsquo;examen approfondi d&rsquo;une batterie GS-Yuasa de 8 \u00e9l\u00e9ments en s\u00e9rie de 75 Ah, publi\u00e9 de fa\u00e7on totalement transparente par le NTSB (National Transportation Safety Board).<\/p>\n<p>La pr\u00e9sence de traces de court-circuit dans un accumulateur (on peut invoquer l&rsquo;effet d&rsquo;une dendrite peut-\u00eatre caus\u00e9e par une impuret\u00e9 pass\u00e9e en solution ?? ) peut expliquer la surcharge intempestive des accumulateurs voisins malgr\u00e9 une tension de charge volontairement faible (32V) pour 8 accumulateurs en s\u00e9rie.<\/p>\n<p><a href=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2013\/01\/GS-YUASA-battery-scan.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter  wp-image-23747\" title=\"GS-YUASA battery scan\" src=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2013\/01\/GS-YUASA-battery-scan-300x243.jpg\" alt=\"\" width=\"400\" height=\"325\" srcset=\"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2013\/01\/GS-YUASA-battery-scan-300x243.jpg 300w, https:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2013\/01\/GS-YUASA-battery-scan-75x60.jpg 75w, https:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2013\/01\/GS-YUASA-battery-scan.jpg 800w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>La trop forte capacit\u00e9 de ces accumulateurs nippons, chacun constitu\u00e9 en interne de 3 ensembles spiral\u00e9s de 25 Ah, assembl\u00e9s en parall\u00e8le, est certainement une des raisons majeures de la gravit\u00e9 et de la r\u00e9p\u00e9tition des incidents rencontr\u00e9s en exploitation.<\/p>\n<p>Le bidouillage\u00a0 mis en \u0153uvre dans la d\u00e9finition et la r\u00e9alisation de ces accumulateurs est d&rsquo;\u00e9vidence totalement inadapt\u00e9 aux contraintes de s\u00e9curit\u00e9 de l&rsquo;application. Un retour\u00a0 de Boeing \u00e0 la technologie Ni-Cd longuement \u00e9prouv\u00e9e me semble \u00eatre une option s\u00e9rieuse \u00e0 envisager par cette prestigieuse compagnie.\u00a0 D\u00e9velopper une nouvelle batterie au Lithium-Ion supposerait d&rsquo;utiliser des \u00e9l\u00e9ments prismatiques de plus faibles capacit\u00e9s, \u00e9quip\u00e9s de coupe-circuit activ\u00e9s en cas de surpression interne,\u00a0 accumulateurs assembl\u00e9s en batterie par un montage en S\u00e9rie-Parall\u00e8le. Mais quelle entreprise raisonnable osera apr\u00e8s ces avanies techniques et m\u00e9diatiques se lancer dans cette aventure tr\u00e8s risqu\u00e9e avec Boeing?<\/p>\n<p><a href=\"http:\/\/www.leblogenergie.com\/2013\/02\/15\/airbus-abandonne-la-technologie-lithium-ion-pour-ses-futures-batteries\/\">A SUIVRE!<\/a><\/p>\n<p>CONSULTER\u00a0 <a href=\"http:\/\/www.ntsb.gov\/investigations\/2013\/boeing_787\/JAL_B-787_1-24-13.pdf\" target=\"_blank\">la remarquable publication du NTSB<\/a> sur le sujet.<\/p>\n<p>Le 25 Janvier 2013<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dans le cadre de l&rsquo;enqu\u00eate am\u00e9ricaine sur les incidents de batteries ayant perturb\u00e9 les r\u00e9cents vols du Boeing 787, il est int\u00e9ressant de consulter l&rsquo;examen approfondi d&rsquo;une batterie GS-Yuasa de 8 \u00e9l\u00e9ments en s\u00e9rie de 75 Ah, publi\u00e9 de fa\u00e7on totalement transparente par le NTSB (National Transportation Safety Board). La pr\u00e9sence de traces de court-circuit [&hellip;]<\/p>\n","protected":false},"author":341,"featured_media":23747,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[2207],"class_list":["post-23746","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-slider"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Un examen approfondi d&#039;une batterie incertaine - leblogenergie.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2013\/01\/25\/un-examen-approfondi-dune-batterie-incertaine\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Un examen approfondi d&#039;une batterie incertaine - leblogenergie.com\" \/>\n<meta name=\"twitter:description\" content=\"Dans le cadre de l&rsquo;enqu\u00eate am\u00e9ricaine sur les incidents de batteries ayant perturb\u00e9 les r\u00e9cents vols du Boeing 787, il est int\u00e9ressant de consulter l&rsquo;examen approfondi d&rsquo;une batterie GS-Yuasa de 8 \u00e9l\u00e9ments en s\u00e9rie de 75 Ah, publi\u00e9 de fa\u00e7on totalement transparente par le NTSB (National Transportation Safety Board). 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