一、鋰電池電芯由什么構成

鋰電池主要由電芯和(he)保護板兩(liang)部分組成(cheng)。PCM動力電(dian)(dian)池(chi)一般稱為(wei)電(dian)(dian)池(chi)管理系統BMS。電(dian)(dian)池(chi)的(de)心(xin)臟，管理系統相當于鋰電(dian)(dian)池(chi)的(de)大腦，電(dian)(dian)池(chi)主要(yao)(yao)由正極構成(cheng)。目前市場上(shang)的(de)鋰離子二(er)次電(dian)(dian)池(chi)充(chong)電(dian)(dian)電(dian)(dian)解液(ye)主要(yao)(yao)由碳(tan)酸鹽類有(you)機(ji)溶(rong)劑六氟磷酸鋰和(he)一些添加劑組成(cheng)。電(dian)(dian)芯主要(yao)(yao)由正極板、隔膜、負極板電(dian)(dian)解液(ye)組成(cheng)。層壓、封裝、填(tian)充(chong)電(dian)(dian)解液(ye)、封裝。

而鋰(li)(li)(li)離子電(dian)(dian)池電(dian)(dian)芯由正極(ji)、負極(ji)、隔(ge)膜、電(dian)(dian)解(jie)液(ye)、外(wai)殼五部分組(zu)成。正極(ji)活性物(wu)質為鈷酸鋰(li)(li)(li)或其他鋰(li)(li)(li)氧化物(wu)，如錳酸鋰(li)(li)(li)三(san)元材(cai)料等，負極(ji)石墨(mo)電(dian)(dian)解(jie)液(ye)為六氟磷酸鋰(li)(li)(li)溶(rong)解(jie)于(yu)多種混合溶(rong)劑，制(zhi)成隔(ge)膜PPPE材(cai)質，外(wai)殼一般有鋁殼和鋼殼。

二、鋰電池電芯是什么材料

鋰電池電芯具有高能(neng)量密度(du)、長壽命、環保等(deng)特點，廣(guang)泛應用于移動電源(yuan)、儲能(neng)系統、智(zhi)能(neng)終端等(deng)領域。鋰電池電芯的材料類型如下：

1、正極材料

鋰電(dian)池電(dian)芯的(de)正極(ji)材(cai)(cai)料(liao)一般(ban)為鈷酸鋰、三(san)元(yuan)材(cai)(cai)料(liao)或鐵鋰材(cai)(cai)料(liao)。其中，鈷酸鋰材(cai)(cai)料(liao)能(neng)夠(gou)提供較(jiao)高(gao)的(de)放電(dian)電(dian)壓和能(neng)量(liang)密(mi)度(du)，但(dan)價格(ge)較(jiao)貴；三(san)元(yuan)材(cai)(cai)料(liao)價格(ge)適中，能(neng)夠(gou)提供較(jiao)好的(de)性能(neng)表現；鐵鋰材(cai)(cai)料(liao)價格(ge)相對便宜，但(dan)能(neng)量(liang)密(mi)度(du)較(jiao)低。

2、負極材料

鋰電池電芯的(de)負極材(cai)料一般(ban)為石墨材(cai)料。石墨材(cai)料具有較好(hao)的(de)導(dao)電性(xing)能和(he)穩(wen)定性(xing)，能夠承(cheng)受較大的(de)電化(hua)學反應，但在高(gao)溫環境下易發生(sheng)導(dao)電性(xing)能下降和(he)容量衰減等(deng)問題(ti)。

3、電解液

鋰電(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)芯的電(dian)(dian)(dian)(dian)(dian)解(jie)液(ye)一般(ban)為有(you)(you)機(ji)液(ye)體(ti)電(dian)(dian)(dian)(dian)(dian)解(jie)質(zhi)、聚合物電(dian)(dian)(dian)(dian)(dian)解(jie)質(zhi)或無機(ji)固體(ti)電(dian)(dian)(dian)(dian)(dian)解(jie)體(ti)。有(you)(you)機(ji)液(ye)體(ti)電(dian)(dian)(dian)(dian)(dian)解(jie)質(zhi)具有(you)(you)良(liang)好(hao)的導(dao)電(dian)(dian)(dian)(dian)(dian)性(xing)能和(he)電(dian)(dian)(dian)(dian)(dian)化學穩(wen)定性(xing)，但在高(gao)(gao)溫環境下易燃易爆；聚合物電(dian)(dian)(dian)(dian)(dian)解(jie)質(zhi)的熱(re)穩(wen)定性(xing)和(he)電(dian)(dian)(dian)(dian)(dian)化學穩(wen)定性(xing)較(jiao)強(qiang)，但導(dao)電(dian)(dian)(dian)(dian)(dian)性(xing)能較(jiao)差(cha)；無機(ji)固體(ti)電(dian)(dian)(dian)(dian)(dian)解(jie)體(ti)具有(you)(you)較(jiao)強(qiang)的電(dian)(dian)(dian)(dian)(dian)導(dao)率和(he)穩(wen)定性(xing)，但價格(ge)較(jiao)高(gao)(gao)。