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深入了解铝壳电池

2022-03-22

深入了解铝壳电池

铝(lv)(lv)(lv)壳(qiao)电(dian)池(chi)是一种由铝(lv)(lv)(lv)合金材料(liao)制成的电(dian)池(chi)壳(qiao),对(dui)于方形锂离(li)子(zi)电(dian)池(chi)来说非常(chang)重(zhong)要。其(qi)采用铝(lv)(lv)(lv)壳(qiao)包装,因为铝(lv)(lv)(lv)壳(qiao)比(bi)钢壳(qiao)更轻、更安全。铝(lv)(lv)(lv)壳(qiao)电(dian)池(chi)常(chang)见设计(ji)有方角(jiao)和圆(yuan)角(jiao)两种,常(chang)见材质为铝(lv)(lv)(lv)锰(meng)合金,还含有Mn、Cu、Mg、Si、Fe等成分,并且这些(xie)成分对(dui)铝(lv)(lv)(lv)壳(qiao)电(dian)池(chi)来说非常(chang)重(zhong)要,Cu和Mg起到增(zeng)强(qiang)(qiang)电(dian)池(chi)强(qiang)(qiang)度和硬度的作(zuo)用,Mn提(ti)高耐腐(fu)蚀性,Si增(zeng)强(qiang)(qiang)镁合金的热处理(li)效果,Fe提(ti)高高温强(qiang)(qiang)度。

铝壳(qiao)(qiao)(qiao)电(dian)池的结构具有显著的安全性能,可(ke)以(yi)用材料厚度和膨(peng)(peng)胀(zhang)系数(shu)来(lai)表示。相同容量的铝壳(qiao)(qiao)(qiao)电(dian)池要比钢壳(qiao)(qiao)(qiao)电(dian)池更轻,因为铝壳(qiao)(qiao)(qiao)可(ke)以(yi)做得(de)更薄。从铝壳(qiao)(qiao)(qiao)电(dian)池的工作(zuo)机(ji)理来(lai)看,充电(dian)时锂离子被脱嵌(qian),正极(ji)(ji)体积(ji)膨(peng)(peng)胀(zhang)。在放电(dian)过(guo)程中,锂离子从正极(ji)(ji)嵌(qian)入,负极(ji)(ji)膨(peng)(peng)胀(zhang)。适当的合金配(pei)方可(ke)以(yi)降低膨(peng)(peng)胀(zhang)系数(shu)。

铝(lv)壳(qiao)电(dian)池(chi)是目前液体锂离子电(dian)池(chi)的(de)(de)(de)主流,几(ji)乎(hu)应用于锂离子电(dian)池(chi)所(suo)涉(she)及的(de)(de)(de)所(suo)有领域。回顾其的(de)(de)(de)发展(zhan)(zhan)历史,可以(yi)说它是在(zai)钢壳(qiao)的(de)(de)(de)基础(chu)上发展(zhan)(zhan)起来的(de)(de)(de)。重量轻、安全,以(yi)及由此产生的(de)(de)(de)性能(neng)优(you)势,使(shi)铝(lv)壳(qiao)成为外壳(qiao)的(de)(de)(de)主流。铝(lv)壳(qiao)电(dian)池(chi)还在(zai)向高(gao)硬度、轻量化的(de)(de)(de)技术(shu)发展(zhan)(zhan),这(zhei)将为市场提(ti)供更优(you)越的(de)(de)(de)技术(shu)。

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