Actuellement, la batterie lithium-fer-phosphate est l'une des plus utilis\u00e9es. Ce type de batterie offre une s\u00e9curit\u00e9 \u00e9lev\u00e9e et une longue dur\u00e9e de vie. Cependant, elle pr\u00e9sente un inconv\u00e9nient majeur\u00a0: ses performances \u00e0 basse temp\u00e9rature sont sup\u00e9rieures \u00e0 celles des autres syst\u00e8mes techniques. La batterie est l\u00e9g\u00e8rement moins performante.<\/p>\n
La basse temp\u00e9rature a un impact sur les \u00e9lectrodes positives et n\u00e9gatives, l'\u00e9lectrolyte et le liant du phosphate de fer et de lithium.
\nL'\u00e9lectrode positive en phosphate de fer et de lithium elle-m\u00eame pr\u00e9sente une conductivit\u00e9 \u00e9lectronique relativement faible et est sujette \u00e0 la polarisation dans les environnements \u00e0 basse temp\u00e9rature, r\u00e9duisant ainsi la capacit\u00e9 de la batterie\u00a0;<\/p>\n
Sous l'effet des basses temp\u00e9ratures, le taux d'insertion du lithium dans le graphite est r\u00e9duit et le lithium m\u00e9tallique risque de pr\u00e9cipiter \u00e0 la surface de l'\u00e9lectrode n\u00e9gative. Si le lithium m\u00e9tallique ne peut pas \u00eatre compl\u00e8tement int\u00e9gr\u00e9 dans le graphite apr\u00e8s une charge insuffisante, il est tr\u00e8s probable qu'il se forme \u00e0 la surface de l'\u00e9lectrode n\u00e9gative. Les dendrites de lithium affectent la s\u00e9curit\u00e9 des batteries\u00a0;<\/p>\n
\u00c0 basse temp\u00e9rature, la viscosit\u00e9 de l'\u00e9lectrolyte augmente, tout comme la r\u00e9sistance \u00e0 la migration des ions lithium. De plus, lors de la production du phosphate de fer lithium, l'adh\u00e9sif est un facteur crucial, et une basse temp\u00e9rature affecte \u00e9galement ses performances. L'impact est donc plus important. Nous sugg\u00e9rons donc une plage de temp\u00e9rature de -20 \u00b0C \u00e0 +75 \u00b0C pour les batteries au phosphate de fer lithium.<\/p>","protected":false},"excerpt":{"rendered":"
At present, lithium iron phosphate battery is one of the most used batteries. This kind of battery has high safety 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