Actuellement, la batterie lithium-fer-phosphate est l'une des plus utilis\u00e9es sur le march\u00e9. Ce type de batterie offre une s\u00e9curit\u00e9 \u00e9lev\u00e9e et une longue dur\u00e9e de vie. Cependant, ses performances \u00e0 basse temp\u00e9rature sont l\u00e9g\u00e8rement inf\u00e9rieures \u00e0 celles des batteries d'autres syst\u00e8mes techniques.<\/p>\n
Les basses temp\u00e9ratures ont un impact sur les \u00e9lectrodes positive et n\u00e9gative, l'\u00e9lectrolyte et le liant du phosphate de fer lithium. L'\u00e9lectrode positive en phosphate de fer lithium pr\u00e9sente une conductivit\u00e9 \u00e9lectronique relativement faible et est sujette \u00e0 la polarisation \u00e0 basse temp\u00e9rature, r\u00e9duisant ainsi la capacit\u00e9 de la batterie. Sous l'effet des basses temp\u00e9ratures, la vitesse d'insertion du lithium graphite est r\u00e9duite et le lithium m\u00e9tallique risque de pr\u00e9cipiter \u00e0 la surface de l'\u00e9lectrode n\u00e9gative. Si elle n'est pas laiss\u00e9e suffisamment longtemps apr\u00e8s la charge, le lithium m\u00e9tallique ne peut plus \u00eatre enti\u00e8rement int\u00e9gr\u00e9 au graphite. Une partie du lithium m\u00e9tallique persiste \u00e0 la surface de l'\u00e9lectrode n\u00e9gative, ce qui risque fort de former des dendrites de lithium, ce qui compromet la s\u00e9curit\u00e9 de la batterie. \u00c0 basse temp\u00e9rature, la viscosit\u00e9 de l'\u00e9lectrolyte augmente, tout comme la r\u00e9sistance \u00e0 la migration des ions lithium. De plus, dans le processus de production du phosphate de fer lithium, l'adh\u00e9sif est un facteur crucial, et les basses temp\u00e9ratures ont un impact majeur sur ses performances.<\/p>\n
Par cons\u00e9quent, il n\u2019est pas recommand\u00e9 d\u2019utiliser les batteries au lithium fer phosphate \u00e0 basse temp\u00e9rature.<\/p>","protected":false},"excerpt":{"rendered":"
At present, lithium iron phosphate battery is one of the most widely used batteries on the market. This kind of 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