Atualmente, a bateria de fosfato de ferro-l\u00edtio \u00e9 uma das baterias mais utilizadas. Esse tipo de bateria possui alta seguran\u00e7a e longa vida \u00fatil. No entanto, a bateria de fosfato de ferro-l\u00edtio tem uma desvantagem fatal: seu desempenho em baixas temperaturas \u00e9 superior ao de outros sistemas t\u00e9cnicos. A bateria \u00e9 um pouco pior.<\/p>\n
A baixa temperatura tem impacto nos eletrodos positivos e negativos, no eletr\u00f3lito e no ligante de fosfato de ferro-l\u00edtio.
\nO pr\u00f3prio eletrodo positivo de fosfato de ferro-l\u00edtio tem condutividade eletr\u00f4nica relativamente baixa e \u00e9 propenso \u00e0 polariza\u00e7\u00e3o em ambientes de baixa temperatura, reduzindo assim a capacidade da bateria;<\/p>\n
Afetada pela baixa temperatura, a taxa de inser\u00e7\u00e3o de l\u00edtio na grafite \u00e9 reduzida, e o l\u00edtio met\u00e1lico tende a precipitar na superf\u00edcie do eletrodo negativo. Se o l\u00edtio met\u00e1lico n\u00e3o puder ser totalmente incorporado \u00e0 grafite novamente, mesmo ap\u00f3s o carregamento por tempo insuficiente, \u00e9 muito prov\u00e1vel que se forme na superf\u00edcie do eletrodo negativo. Os dendritos de l\u00edtio afetam a seguran\u00e7a da bateria;<\/p>\n
Em baixas temperaturas, a viscosidade do eletr\u00f3lito aumenta e a resist\u00eancia \u00e0 migra\u00e7\u00e3o de \u00edons de l\u00edtio tamb\u00e9m aumenta. Al\u00e9m disso, no processo de produ\u00e7\u00e3o de fosfato de ferro-l\u00edtio, o adesivo tamb\u00e9m \u00e9 um fator muito cr\u00edtico, e baixas temperaturas tamb\u00e9m afetam o desempenho do adesivo. Isso tem um impacto maior. Portanto, sugerimos que a faixa de temperatura da bateria de fosfato de ferro-l\u00edtio seja de -20\u00b0C a +75\u00b0C.<\/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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