Les batteries au lithium fer phosphate se composent g\u00e9n\u00e9ralement d'une \u00e9lectrode positive, d'une \u00e9lectrode n\u00e9gative, d'un s\u00e9parateur, d'un \u00e9lectrolyte, d'un bo\u00eetier et d'autres accessoires.<\/p>\n
Le mat\u00e9riau actif de l'\u00e9lectrode positive est le phosphate de fer et de lithium de type olivine (LiFePO4), qui ne peut \u00eatre utilis\u00e9 qu'apr\u00e8s modification telle que le rev\u00eatement en carbone et le dopage.<\/p>\n
Les mat\u00e9riaux actifs de l'\u00e9lectrode n\u00e9gative sont des mat\u00e9riaux en graphite tels que le graphite naturel et le graphite artificiel, ainsi que des mat\u00e9riaux en carbone tels que le carbone dur et le carbone mou, qui n\u00e9cessitent \u00e9galement un traitement appropri\u00e9 avant de pouvoir \u00eatre utilis\u00e9s.<\/p>\n
Le diaphragme est compos\u00e9 d'un ou deux mat\u00e9riaux parmi le poly\u00e9thyl\u00e8ne (PE) et le polypropyl\u00e8ne (PP). Il est souvent utilis\u00e9 comme film composite monocouche ou multicouche. Il existe \u00e9galement des moyens d'augmenter la couche de c\u00e9ramique inorganique \u00e0 la surface du film, am\u00e9liorant ainsi dans une certaine mesure la s\u00e9curit\u00e9 des batteries.<\/p>\n
L'\u00e9lectrolyte est une solution de sel de lithium avec du carbonate en cha\u00eene ou cyclique comme solvant, et des additifs sp\u00e9ciaux y sont ajout\u00e9s.<\/p>\n
La coque ext\u00e9rieure est le contenant qui contient les autres composants de la batterie. Elle est g\u00e9n\u00e9ralement compos\u00e9e d'acier inoxydable haute r\u00e9sistance et r\u00e9sistant \u00e0 la corrosion, d'alliage d'aluminium, de plastiques sp\u00e9ciaux et d'autres mat\u00e9riaux. Certaines batteries sont \u00e9galement dot\u00e9es d'une coque ext\u00e9rieure en film composite aluminium-plastique. En utilisation r\u00e9elle, une coque ext\u00e9rieure haute r\u00e9sistance est n\u00e9cessaire pour assurer la protection.<\/p>\n
De plus, il existe des agents conducteurs qui augmentent la conductivit\u00e9 des \u00e9lectrodes positives et n\u00e9gatives de la batterie, le liant qui fixe le mat\u00e9riau actif, la feuille de cuivre et la feuille d'aluminium qui supportent le mat\u00e9riau en poudre et le collecteur de courant, et connectent l'int\u00e9rieur et l'ext\u00e9rieur de la batterie et la pi\u00e8ce de connexion conductrice, les accessoires auxiliaires tels que les languettes et les p\u00f4les.<\/p>","protected":false},"excerpt":{"rendered":"
Lithium iron phosphate batteries generally consist of a positive electrode, a negative electrode, a separator, an electrolyte, a casing and 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