一、鋰電池電芯由什么構成

鋰電池主要由電芯和保護板(ban)兩部(bu)分(fen)組成。PCM動力(li)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)一般稱(cheng)為電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)管理(li)系(xi)統BMS。電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)心臟(zang)，管理(li)系(xi)統相當于(yu)鋰(li)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)大腦，電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)主(zhu)(zhu)要由(you)正極(ji)(ji)構成。目前市場上的(de)鋰(li)離子二次電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)充電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)解液(ye)主(zhu)(zhu)要由(you)碳酸(suan)鹽類有機溶劑(ji)(ji)六氟磷酸(suan)鋰(li)和一些(xie)添加劑(ji)(ji)組成。電(dian)(dian)(dian)(dian)(dian)芯(xin)主(zhu)(zhu)要由(you)正極(ji)(ji)板(ban)、隔膜、負極(ji)(ji)板(ban)電(dian)(dian)(dian)(dian)(dian)解液(ye)組成。層壓、封(feng)裝、填充電(dian)(dian)(dian)(dian)(dian)解液(ye)、封(feng)裝。

而鋰離(li)子電池電芯由正極(ji)、負(fu)極(ji)、隔膜、電解(jie)液、外殼五部(bu)分組成。正極(ji)活性物質為鈷酸鋰或其他鋰氧化物，如錳酸鋰三元材料等，負(fu)極(ji)石墨電解(jie)液為六氟(fu)磷(lin)酸鋰溶解(jie)于多(duo)種混合溶劑，制成隔膜PPPE材質，外殼一般(ban)有鋁殼和鋼(gang)殼。

二、鋰電池電芯是什么材料

鋰電(dian)(dian)池電(dian)(dian)芯具有高能(neng)量密度、長壽命、環(huan)保等特點，廣泛(fan)應用于移(yi)動電(dian)(dian)源、儲能(neng)系統、智能(neng)終端等領(ling)域(yu)。鋰電(dian)(dian)池電(dian)(dian)芯的材料類型如(ru)下：

1、正極材料

鋰(li)(li)電池(chi)電芯的正極材料(liao)一(yi)般為(wei)鈷酸鋰(li)(li)、三元(yuan)材料(liao)或鐵鋰(li)(li)材料(liao)。其(qi)中(zhong)，鈷酸鋰(li)(li)材料(liao)能(neng)(neng)夠提供較(jiao)高的放電電壓和能(neng)(neng)量密(mi)度，但價(jia)(jia)格(ge)較(jiao)貴；三元(yuan)材料(liao)價(jia)(jia)格(ge)適中(zhong)，能(neng)(neng)夠提供較(jiao)好的性能(neng)(neng)表(biao)現；鐵鋰(li)(li)材料(liao)價(jia)(jia)格(ge)相對(dui)便宜(yi)，但能(neng)(neng)量密(mi)度較(jiao)低。

2、負極材料

鋰電池電芯的負極材(cai)(cai)料一(yi)般(ban)為石(shi)墨材(cai)(cai)料。石(shi)墨材(cai)(cai)料具有較好的導(dao)電(dian)性能(neng)和(he)穩定(ding)性，能(neng)夠承受較大的電(dian)化學反應，但(dan)在(zai)高溫環境(jing)下易發生導(dao)電(dian)性能(neng)下降和(he)容量衰減等問題。

3、電解液

鋰電(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)芯的(de)電(dian)(dian)(dian)(dian)(dian)解(jie)(jie)液一般為有機液體(ti)電(dian)(dian)(dian)(dian)(dian)解(jie)(jie)質(zhi)、聚合物(wu)電(dian)(dian)(dian)(dian)(dian)解(jie)(jie)質(zhi)或無機固(gu)體(ti)電(dian)(dian)(dian)(dian)(dian)解(jie)(jie)體(ti)。有機液體(ti)電(dian)(dian)(dian)(dian)(dian)解(jie)(jie)質(zhi)具有良(liang)好的(de)導(dao)電(dian)(dian)(dian)(dian)(dian)性(xing)(xing)能(neng)(neng)和電(dian)(dian)(dian)(dian)(dian)化(hua)學穩定(ding)性(xing)(xing)，但在(zai)高(gao)溫環(huan)境(jing)下易(yi)燃易(yi)爆；聚合物(wu)電(dian)(dian)(dian)(dian)(dian)解(jie)(jie)質(zhi)的(de)熱穩定(ding)性(xing)(xing)和電(dian)(dian)(dian)(dian)(dian)化(hua)學穩定(ding)性(xing)(xing)較強，但導(dao)電(dian)(dian)(dian)(dian)(dian)性(xing)(xing)能(neng)(neng)較差；無機固(gu)體(ti)電(dian)(dian)(dian)(dian)(dian)解(jie)(jie)體(ti)具有較強的(de)電(dian)(dian)(dian)(dian)(dian)導(dao)率和穩定(ding)性(xing)(xing)，但價格較高(gao)。