{"id":722,"date":"2024-12-03T11:09:00","date_gmt":"2024-12-03T11:09:00","guid":{"rendered":"https:\/\/cnsfdz.com\/%e6%96%b0%e8%83%bd%e6%ba%90%e6%b1%bd%e8%bd%a6bms%e7%94%b5%e6%b5%81%e6%a3%80%e6%b5%8b%e6%8a%80%e6%9c%af%e6%b7%b1%e5%ba%a6%e8%a7%a3%e6%9e%90%ef%bc%9a%e5%88%86%e6%b5%81%e5%99%a8vs%e9%9c%8d%e5%b0%94\/"},"modified":"2026-02-04T16:11:24","modified_gmt":"2026-02-04T16:11:24","slug":"analyse-approfondie-de-la-technologie-de-detection-de-courant-bms-pour-les-vehicules-a-energie-nouvelle-2","status":"publish","type":"post","link":"https:\/\/cnsfdz.com\/fr\/analyse-approfondie-de-la-technologie-de-detection-de-courant-bms-pour-les-vehicules-a-energie-nouvelle-2\/","title":{"rendered":"Technologie de d\u00e9tection de courant dans le syst\u00e8me de gestion des v\u00e9hicules \u00e0 \u00e9nergie nouvelle : shunt ou capteur \u00e0 effet Hall"},"content":{"rendered":"<h2>I. Importance de la d\u00e9tection du courant par le BMS<\/h2>\n<p>Le syst\u00e8me de gestion de la batterie (BMS) est le principal composant de s\u00e9curit\u00e9 des v\u00e9hicules \u00e0 \u00e9nergie nouvelle, et la d\u00e9tection du courant est l'une des fonctions les plus critiques du BMS. La mesure pr\u00e9cise du courant affecte directement :<\/p>\n<ul>\n<li><strong>Pr\u00e9cision de l'estimation du SOC<\/strong>L'int\u00e9grale du courant est la base du calcul du SOC, et les erreurs de mesure du courant peuvent s'accumuler et provoquer des \u00e9carts de SOC.<\/li>\n<li><strong>\u00c9valuation du SOH<\/strong>La sant\u00e9 de la batterie : analyse de la sant\u00e9 de la batterie en fonction des caract\u00e9ristiques du courant de charge et de d\u00e9charge<\/li>\n<li><strong>protection de la s\u00e9curit\u00e9<\/strong>La protection contre les surintensit\u00e9s et les courts-circuits repose sur la surveillance du courant en temps r\u00e9el.<\/li>\n<li><strong>Contr\u00f4le de l'\u00e9galisation<\/strong>L'\u00e9galisation active n\u00e9cessite un retour d'information pr\u00e9cis sur le courant<\/li>\n<\/ul>\n<p>Selon la norme GB\/T 38661-2020 \"Battery Management System Technical Conditions for Electric Vehicles\", la pr\u00e9cision de la mesure du courant du BMS ne doit pas d\u00e9passer \u00b11%FS, et certains \u00e9quipementiers exigent \u00b10,5%FS, voire plus.<\/p>\n<h2>Programme de d\u00e9tection du courant shunt<\/h2>\n<h3>2.1 Principes de fonctionnement<\/h3>\n<p>Le shunt est une r\u00e9sistance de pr\u00e9cision \u00e0 faible r\u00e9sistance connect\u00e9e en s\u00e9rie dans le circuit principal de la batterie. Lorsque le courant circule, selon la loi d'Ohm V=IR, une chute de tension proportionnelle au courant est g\u00e9n\u00e9r\u00e9e \u00e0 travers le shunt. En mesurant cette tension minuscule \u00e0 l'aide d'un CAN de haute pr\u00e9cision, la valeur du courant peut \u00eatre calcul\u00e9e.<\/p>\n<h3>2.2 Avantages du programme shunt<\/h3>\n<ul>\n<li><strong>tr\u00e8s pr\u00e9cis<\/strong>Pr\u00e9cision de classe jusqu'\u00e0 0,1%, excellente lin\u00e9arit\u00e9<\/li>\n<li><strong>peu co\u00fbteux<\/strong>Les avantages en termes de co\u00fbts des shunts par rapport aux capteurs \u00e0 effet Hall<\/li>\n<li><strong>large bande<\/strong>Temps de r\u00e9ponse rapide, d\u00e9tecte les variations de courant \u00e0 haute fr\u00e9quence<\/li>\n<li><strong>Pas de d\u00e9rive du z\u00e9ro<\/strong>Capteurs \u00e0 effet Hall : pas de probl\u00e8me de d\u00e9rive de la temp\u00e9rature au point z\u00e9ro avec les capteurs \u00e0 effet Hall<\/li>\n<li><strong>haute fiabilit\u00e9<\/strong>Les appareils de mesure de la qualit\u00e9 de l'air : aucune alimentation n'est n\u00e9cessaire, appareil purement passif, taux de d\u00e9faillance tr\u00e8s faible.<\/li>\n<\/ul>\n<h3>2.3 Les d\u00e9fis du programme shunt<\/h3>\n<ul>\n<li><strong>perte de puissance<\/strong>Les courants \u00e9lev\u00e9s g\u00e9n\u00e8rent de la chaleur, la dissipation de la chaleur doit \u00eatre prise en compte.<\/li>\n<li><strong>Mesures non isol\u00e9es<\/strong>Le shunt est directement connect\u00e9 au bus haute tension et n\u00e9cessite un circuit d'isolation pour prot\u00e9ger le c\u00f4t\u00e9 basse tension.<\/li>\n<li><strong>tension de mode commun<\/strong>Tension de mode commun \u00e9lev\u00e9e lors de la d\u00e9tection du c\u00f4t\u00e9 haut, exigences \u00e9lev\u00e9es en mati\u00e8re d'amplificateurs opto\u00e9lectroniques<\/li>\n<\/ul>\n<h3>2.4 S\u00e9lection des param\u00e8tres typiques<\/h3>\n<p>Plages de param\u00e8tres typiques pour les shunts dans la GTB EV :<\/p>\n<ul>\n<li>R\u00e9sistance : 25\u03bc\u03a9 - 100\u03bc\u03a9<\/li>\n<li>Courant nominal : \u00b1500A - \u00b11000A<\/li>\n<li>TCR : \u226450ppm\/\u00b0C<\/li>\n<li>Pr\u00e9cision : 0,5% ou mieux<\/li>\n<\/ul>\n<h2>Programme de capteurs de courant \u00e0 effet Hall<\/h2>\n<h3>3.1 Principes de fonctionnement<\/h3>\n<p>Les capteurs \u00e0 effet Hall utilisent l'effet Hall pour mesurer le courant : le courant mesur\u00e9 g\u00e9n\u00e8re un champ magn\u00e9tique, et l'\u00e9l\u00e9ment Hall d\u00e9tecte la variation du champ magn\u00e9tique et la convertit en un signal de sortie sous forme de tension. Selon le mode de fonctionnement, on peut distinguer deux cat\u00e9gories : la boucle ouverte et la boucle ferm\u00e9e.<\/p>\n<h3>3.2 Capteurs \u00e0 effet Hall en boucle ouverte<\/h3>\n<ul>\n<li>Structure simple et faible co\u00fbt<\/li>\n<li>Pr\u00e9cision moyenne, environ 1-3%<\/li>\n<li>D\u00e9rive importante en temp\u00e9rature, environ 1%\/\u00b0C<\/li>\n<li>La bande passante est limit\u00e9e et g\u00e9n\u00e9ralement&lt;50kHz<\/li>\n<\/ul>\n<h3>3.3 Capteurs \u00e0 effet Hall en boucle ferm\u00e9e<\/h3>\n<ul>\n<li>Adoption du principe d'\u00e9quilibrage magn\u00e9tique, plus grande pr\u00e9cision (environ 0,5%)<\/li>\n<li>D\u00e9rive en temp\u00e9rature inf\u00e9rieure \u00e0 la boucle ouverte<\/li>\n<li>Largeur de bande plus \u00e9lev\u00e9e, jusqu'\u00e0 100 kHz ou plus<\/li>\n<li>Des co\u00fbts plus \u00e9lev\u00e9s<\/li>\n<\/ul>\n<h3>3.4 Avantages des capteurs \u00e0 effet Hall<\/h3>\n<ul>\n<li><strong>l'isolement naturel<\/strong>Isolation \u00e9lectrique du circuit test\u00e9 par rapport au signal de sortie<\/li>\n<li><strong>pas de consommation d'\u00e9nergie<\/strong>Pas de pertes dans le circuit principal<\/li>\n<li><strong>Facile \u00e0 installer<\/strong>Mesure sans contact, pas besoin de d\u00e9connecter les circuits<\/li>\n<\/ul>\n<h3>3.5 D\u00e9fauts du capteur \u00e0 effet Hall<\/h3>\n<ul>\n<li><strong>d\u00e9rive du point z\u00e9ro<\/strong>Les variations de temp\u00e9rature peuvent provoquer des d\u00e9calages du z\u00e9ro qui affectent les mesures de petits courants.<\/li>\n<li><strong>hyst\u00e9r\u00e9sis<\/strong>: Il existe une erreur d'hyst\u00e9r\u00e9sis<\/li>\n<li><strong>sensible aux interf\u00e9rences<\/strong>Les champs magn\u00e9tiques externes peuvent affecter la pr\u00e9cision des mesures<\/li>\n<li><strong>Des co\u00fbts plus \u00e9lev\u00e9s<\/strong>Produits de haute pr\u00e9cision en boucle ferm\u00e9e<\/li>\n<\/ul>\n<h2>IV. comparaison globale des deux programmes<\/h2>\n<table>\n<tr>\n<th>Projet de comparaison<\/th>\n<th>Programme de fractionnement<\/th>\n<th>Solutions pour les capteurs \u00e0 effet Hall<\/th>\n<\/tr>\n<tr>\n<td>pr\u00e9cis<\/td>\n<td>0,1%-0,5%, excellent<\/td>\n<td>0,5%-3%, g\u00e9n\u00e9ral<\/td>\n<\/tr>\n<tr>\n<td>les co\u00fbts (de fabrication, de production, etc.)<\/td>\n<td>\u4f4e<\/td>\n<td>moyenne-\u00e9lev\u00e9e<\/td>\n<\/tr>\n<tr>\n<td>l'isolement<\/td>\n<td>N\u00e9cessite un circuit d'isolation suppl\u00e9mentaire<\/td>\n<td>l'isolement naturel<\/td>\n<\/tr>\n<tr>\n<td>gaspillage d'\u00e9nergie<\/td>\n<td>\u6709<\/td>\n<td>Aucune (circuit principal)<\/td>\n<\/tr>\n<tr>\n<td>stabilit\u00e9 de la temp\u00e9rature<\/td>\n<td>\u597d<\/td>\n<td>habituel<\/td>\n<\/tr>\n<tr>\n<td>d\u00e9rive du point z\u00e9ro<\/td>\n<td>\u65e0<\/td>\n<td>\u6709<\/td>\n<\/tr>\n<tr>\n<td>largeurs de bande<\/td>\n<td>\u9ad8<\/td>\n<td>mod\u00e9r\u00e9<\/td>\n<\/tr>\n<tr>\n<td>Complexit\u00e9 de l'installation<\/td>\n<td>doivent \u00eatre connect\u00e9s \u00e0 un circuit<\/td>\n<td>installation sans contact<\/td>\n<\/tr>\n<\/table>\n<h2>V. Tendances technologiques \u00e9mergentes<\/h2>\n<h3>5.1 Capteurs Fluxgate<\/h3>\n<p>Les capteurs Fluxgate, qui combinent la haute pr\u00e9cision des shunts avec les caract\u00e9ristiques d'isolation des capteurs \u00e0 effet Hall, sont de plus en plus utilis\u00e9s dans les syst\u00e8mes de gestion des b\u00e2timents de nouvelle g\u00e9n\u00e9ration. Sa pr\u00e9cision peut atteindre 0,1%, sa d\u00e9rive en temp\u00e9rature&lt;0,01%\/\u00b0C, ce qui en fait la solution privil\u00e9gi\u00e9e pour les v\u00e9hicules \u00e9lectriques haut de gamme.<\/p>\n<h3>5.2 Capteurs de courant TMR<\/h3>\n<p>Les capteurs \u00e0 effet magn\u00e9tor\u00e9sistif \u00e0 effet tunnel (TMR) constituent la derni\u00e8re g\u00e9n\u00e9ration d'\u00e9l\u00e9ments magn\u00e9tiques sensibles pr\u00e9sentant les avantages d'une faible consommation d'\u00e9nergie, d'une faible d\u00e9rive en temp\u00e9rature, d'une grande sensibilit\u00e9, etc., qui devraient remplacer \u00e0 l'avenir les capteurs \u00e0 effet Hall traditionnels.<\/p>\n<h3>5.3 Programmes d'int\u00e9gration<\/h3>\n<p>De plus en plus de fournisseurs de puces introduisent des puces frontales BMS avec d\u00e9tection de courant int\u00e9gr\u00e9e, qui simplifient la conception du syst\u00e8me en int\u00e9grant l'interface shunt, l'amplificateur et l'ADC.<\/p>\n<h2>VI. Recommandations pour la s\u00e9lection des candidatures<\/h2>\n<ol>\n<li><strong>Applications de pr\u00e9cision, sensibles aux co\u00fbts<\/strong>S\u00e9lection de solutions de shunt avec des ADC isol\u00e9s de haute pr\u00e9cision<\/li>\n<li><strong>Applications avec des exigences d'isolation \u00e9lev\u00e9es et un espace d'installation limit\u00e9<\/strong>Capteurs de Hall \u00e0 boucle ferm\u00e9e : S\u00e9lection de capteurs de Hall \u00e0 boucle ferm\u00e9e<\/li>\n<li><strong>V\u00e9hicules haut de gamme, applications exigeantes en termes de performances<\/strong>Les capteurs \u00e0 vanne de flux : Envisager des capteurs \u00e0 vanne de flux<\/li>\n<li><strong>Applications de s\u00e9curit\u00e9 fonctionnelle n\u00e9cessitant une conception redondante<\/strong>D\u00e9tection double avec des capteurs \u00e0 shunt et \u00e0 effet Hall possible<\/li>\n<\/ol>\n<h2>VII. r\u00e9sum\u00e9<\/h2>\n<p>Dans le domaine de la d\u00e9tection du courant dans le syst\u00e8me de gestion des b\u00e2timents pour les v\u00e9hicules \u00e0 \u00e9nergie nouvelle, les shunts et les capteurs \u00e0 effet Hall ont leurs propres avantages et inconv\u00e9nients. Avec sa grande pr\u00e9cision, son faible co\u00fbt et l'absence de d\u00e9rive du z\u00e9ro, le shunt occupe une place importante dans la recherche d'applications de haute performance, tandis que les capteurs \u00e0 effet Hall sont irrempla\u00e7ables dans certains sc\u00e9narios gr\u00e2ce aux avantages de l'isolation naturelle et de la facilit\u00e9 d'installation. Les ing\u00e9nieurs doivent choisir la solution optimale en tenant compte des exigences sp\u00e9cifiques de l'application, du budget et de l'architecture du syst\u00e8me. Comme les v\u00e9hicules \u00e9lectriques continuent d'am\u00e9liorer leur autonomie et leurs exigences en mati\u00e8re de s\u00e9curit\u00e9, la technologie de d\u00e9tection de courant de haute pr\u00e9cision et tr\u00e8s fiable continuera d'\u00e9voluer.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u5bf9\u6bd4\u5206\u6790BMS\u7cfb\u7edf\u4e2d\u5206\u6d41\u5668\u548c\u970d\u5c14\u4f20\u611f\u5668\u4e24\u79cd\u4e3b\u6d41\u7535\u6d41\u68c0\u6d4b\u65b9\u6848\u7684\u4f18\u7f3a\u70b9\u53ca\u5e94\u7528\u9009\u62e9\u3002<\/p>","protected":false},"author":1,"featured_media":748,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-722","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tech-articles"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v26.9) - 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