La n\u00e9cessit\u00e9 d'une protection pour les batteries au lithium d\u00e9pend de leurs caract\u00e9ristiques. Le mat\u00e9riau de la batterie au lithium lui permettant de r\u00e9sister aux surcharges, aux d\u00e9charges excessives, aux surintensit\u00e9s, aux courts-circuits et aux temp\u00e9ratures de charge et de d\u00e9charge ultra-\u00e9lev\u00e9es, ses composants sont toujours dot\u00e9s d'une protection de pointe.<\/p>\n
Les cartes de protection de batterie au lithium ordinaires comprennent g\u00e9n\u00e9ralement des circuits int\u00e9gr\u00e9s de contr\u00f4le, des commutateurs MOS, des r\u00e9sistances, des condensateurs et des dispositifs auxiliaires FUSE, PTC, NTC, ID, m\u00e9moire, etc. Parmi eux, le circuit int\u00e9gr\u00e9 de contr\u00f4le contr\u00f4le l'interrupteur MOS pour qu'il s'allume dans toutes les conditions normales pour faire conduire la cellule et le circuit externe, et lorsque la tension de la cellule ou le courant de boucle d\u00e9passe la valeur sp\u00e9cifi\u00e9e, il contr\u00f4le imm\u00e9diatement l'interrupteur MOS pour qu'il s'\u00e9teigne afin de prot\u00e9ger la s\u00e9curit\u00e9 de la cellule.<\/p>\n
Lorsque la carte de protection est normale, Vdd est \u00e9lev\u00e9, Vss et VM sont faibles, et DO et CO sont \u00e9lev\u00e9s. Toute modification d'un param\u00e8tre de Vdd, Vss ou VM entra\u00eene une modification du niveau de DO ou CO.
\n1. Tension de d\u00e9tection de surcharge : dans des conditions normales, Vdd augmente progressivement jusqu'\u00e0 la tension entre VDD et VSS lorsque la borne CO passe du niveau haut au niveau bas.
\n2. Tension de d\u00e9charge de surcharge : Dans l'\u00e9tat de charge, Vdd diminue progressivement jusqu'\u00e0 la tension entre VDD et VSS lorsque la borne CO passe du niveau bas au niveau haut.
\n3. Tension de d\u00e9tection de d\u00e9charge excessive : dans des conditions normales, Vdd diminue progressivement jusqu'\u00e0 la tension entre VDD et VSS lorsque la borne DO passe du niveau haut au niveau bas.
\n4. Tension de d\u00e9charge excessive : dans l'\u00e9tat de d\u00e9charge excessive, Vdd augmente progressivement jusqu'\u00e0 la tension entre VDD et VSS lorsque la borne DO passe du niveau bas au niveau haut.
\n5. Tension de d\u00e9tection de surintensit\u00e9 1 : Dans des conditions normales, VM augmente progressivement jusqu'\u00e0 la tension entre VM et VSS lorsque DO passe du niveau haut au niveau bas.
\n6. Tension de d\u00e9tection de surintensit\u00e9 2 : Dans l'\u00e9tat normal, VM passe de OV \u00e0 la tension entre VM et VSS lorsque la borne DO passe de haut \u00e0 bas \u00e0 une vitesse de 1 ms ou plus et de 4 ms ou moins.
\n7. Tension de d\u00e9tection de court-circuit de charge : Dans des conditions normales, VM d\u00e9marre \u00e0 partir de OV et monte jusqu'\u00e0 la tension entre VM et VSS lorsque la borne DO passe du niveau haut au niveau bas \u00e0 une vitesse de 1 \u03bcS ou plus et de 50 \u03bcS ou moins.
\n8. Tension de d\u00e9tection du chargeur : dans l'\u00e9tat de d\u00e9charge excessive, VM diminue progressivement avec OV jusqu'\u00e0 la tension entre VM et VSS lorsque DO passe du niveau bas au niveau haut.
\n9. Consommation de courant pendant le fonctionnement normal : Dans des conditions normales, le courant (IDD) circulant \u00e0 travers la borne VDD est la consommation de courant pendant le fonctionnement normal.
\n10. Consommation de courant de d\u00e9charge excessive : Dans l'\u00e9tat de d\u00e9charge, le courant (IDD) circulant \u00e0 travers la borne VDD est la consommation de courant de d\u00e9charge de surintensit\u00e9.<\/p>","protected":false},"excerpt":{"rendered":"
The reason why lithium batteries need protection is determined by their own characteristics. Since the material of the lithium battery 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