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深入了解鋁殼電池

2022-03-22

深入了解鋁殼電池

鋁殼電池是一種由鋁合金材料制成的電池殼,對于方形鋰離子電池來說非常重要。其采用鋁殼包裝,因?yàn)殇X殼比鋼殼更輕、更安全。鋁殼電池常見設(shè)計(jì)有方角和圓角兩種,常見材質(zhì)為鋁錳合金,還含有Mn、Cu、Mg、Si、Fe等成分,并且這些成分對鋁殼電池來說非常重要,Cu和Mg起到增強(qiáng)電池強(qiáng)度和硬度的作用,Mn提高耐腐蝕性,Si增強(qiáng)鎂合金的熱處理效果,F(xiàn)e提高高溫強(qiáng)度。

鋁殼電池的結(jié)構(gòu)具有顯著的安全性能,可以用材料厚度和膨脹系數(shù)來表示。相同容量的鋁殼電池要比鋼殼電池更輕,因?yàn)殇X殼可以做得更薄。從鋁殼電池的工作機(jī)理來看,充電時鋰離子被脫嵌,正極體積膨脹。在放電過程中,鋰離子從正極嵌入,負(fù)極膨脹。適當(dāng)?shù)暮辖鹋浞娇梢越档团蛎浵禂?shù)。

鋁殼電池是目前液體鋰離子電池的主流,幾乎應(yīng)用于鋰離子電池所涉及的所有領(lǐng)域?;仡櫰涞陌l(fā)展歷史,可以說它是在鋼殼的基礎(chǔ)上發(fā)展起來的。重量輕、安全,以及由此產(chǎn)生的性能優(yōu)勢,使鋁殼成為外殼的主流。鋁殼電池還在向高硬度、輕量化的技術(shù)發(fā)展,這將為市場提供更優(yōu)越的技術(shù)。

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