鋰電池充電電流一般是多大這個不能一概而論，而是要看鋰電池本身性能決定，現(xian)在市面上有(you)支持1C~10C充電(dian)(dian)電(dian)(dian)流大小，不過(guo)實際上，要想鋰離子電(dian)(dian)池(chi)壽命長，基本上是(shi)以(yi)0.1~0.3C充電(dian)(dian)10~4H。也就是(shi)說，容量為1500mAh的電(dian)(dian)池(chi)，假如以(yi)0.2C充電(dian)(dian)，則充電(dian)(dian)電(dian)(dian)流為0.2×1500=300mA，充電(dian)(dian)5小時。

18650鋰(li)離(li)子(zi)電(dian)(dian)(dian)池(chi)常規容量型1800-2400（三元材料），充(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流一(yi)般為0.5C，即(ji)1A。而(er)倍率型1200-1500，充(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流也為0.5C，不(bu)過(guo)只有0.7A。鋰(li)離(li)子(zi)電(dian)(dian)(dian)池(chi)一(yi)般上采用小電(dian)(dian)(dian)流充(chong)(chong)放的(de)形(xing)式，假如加大電(dian)(dian)(dian)流，會(hui)(hui)造成充(chong)(chong)電(dian)(dian)(dian)嵌鋰(li)速度(du)過(guo)快，對(dui)正極(ji)負(fu)極(ji)材料結構的(de)影響將是毀滅性的(de)，壽(shou)命會(hui)(hui)在十(shi)幾周內迅速終結并且可能(neng)還會(hui)(hui)帶(dai)來安全問題。

鋰(li)離子(zi)電(dian)(dian)池的充(chong)(chong)電(dian)(dian)方法有很多種(zhong)，按充(chong)(chong)電(dian)(dian)效率可分為常規(gui)充(chong)(chong)電(dian)(dian)和(he)(he)快速充(chong)(chong)電(dian)(dian)。其中(zhong)常規(gui)充(chong)(chong)電(dian)(dian)方法包括：恒(heng)流充(chong)(chong)電(dian)(dian)、恒(heng)壓(ya)充(chong)(chong)電(dian)(dian)、階段充(chong)(chong)電(dian)(dian)和(he)(he)間(jian)歇充(chong)(chong)電(dian)(dian)，而快速充(chong)(chong)電(dian)(dian)包括脈沖(chong)充(chong)(chong)電(dian)(dian)和(he)(he)Reflex充(chong)(chong)電(dian)(dian)。

日常表述(shu)中的鋰離子電(dian)池(chi)充(chong)電(dian)電(dian)流(liu)是(shi)針對鋰離子電(dian)池(chi)在充(chong)電(dian)過程中所處(chu)快(kuai)速(su)充(chong)電(dian)階(jie)段(duan)(duan)的充(chong)電(dian)電(dian)流(liu)而言的，作為(wei)一個(ge)動態的過程，鋰離子電(dian)池(chi)最充(chong)電(dian)電(dian)流(liu)實際上是(shi)分(fen)為(wei)三個(ge)階(jie)段(duan)(duan)的。

1、預充(chong)(chong)電(dian)(dian)時的(de)最佳電(dian)(dian)流(liu)(liu)：即(ji)當鋰離子(zi)電(dian)(dian)池的(de)初始(shi)/空載電(dian)(dian)壓低于(yu)預充(chong)(chong)電(dian)(dian)閾(yu)值時，首先要經(jing)過(guo)一(yi)(yi)個預充(chong)(chong)電(dian)(dian)階(jie)段(duan)，就單個鋰離子(zi)電(dian)(dian)池而言，這個閾(yu)值一(yi)(yi)般為(wei)3.0V，在此(ci)階(jie)段(duan)，預充(chong)(chong)電(dian)(dian)電(dian)(dian)流(liu)(liu)大約為(wei)下一(yi)(yi)個階(jie)段(duan)恒流(liu)(liu)充(chong)(chong)電(dian)(dian)階(jie)段(duan)電(dian)(dian)流(liu)(liu)的(de)10%左(zuo)右。

2、恒(heng)流(liu)(liu)充電(dian)時(shi)的(de)最(zui)佳電(dian)流(liu)(liu)：所謂恒(heng)流(liu)(liu)就(jiu)(jiu)是電(dian)流(liu)(liu)恒(heng)定(ding)，電(dian)壓逐(zhu)漸(jian)升高，此(ci)時(shi)進入快(kuai)速充電(dian)階(jie)段。大(da)多數的(de)恒(heng)流(liu)(liu)充電(dian)電(dian)流(liu)(liu)設定(ding)為0.4~0.6C之(zhi)間(jian)，可(ke)以(yi)理解(jie)為0.5C，也就(jiu)(jiu)是在不考慮其他因素的(de)情(qing)況下(xia)，大(da)約兩個(ge)小時(shi)可(ke)以(yi)充滿。之(zhi)所以(yi)選擇0.5C，是因為這個(ge)電(dian)流(liu)(liu)很好地做到了(le)充電(dian)時(shi)間(jian)與充電(dian)安(an)全性的(de)平衡。

3、恒壓充(chong)電(dian)(dian)時的(de)(de)充(chong)電(dian)(dian)電(dian)(dian)流(liu)：就(jiu)單節鋰(li)離子電(dian)(dian)池而言，當電(dian)(dian)池達到一定(ding)電(dian)(dian)壓值(zhi)時，即進入恒定(ding)電(dian)(dian)壓充(chong)電(dian)(dian)，這(zhe)個電(dian)(dian)壓值(zhi)一般(ban)為(wei)4.2V，在此階(jie)段(duan)，電(dian)(dian)壓不變，電(dian)(dian)流(liu)減(jian)小；這(zhe)種電(dian)(dian)流(liu)減(jian)小是個依次遞減(jian)過程(cheng)，大多(duo)數的(de)(de)鋰(li)離子電(dian)(dian)池保護選擇0.01C為(wei)終(zhong)止電(dian)(dian)流(liu)，這(zhe)也就(jiu)意味著充(chong)電(dian)(dian)過程(cheng)進入結束(shu)狀態。一旦充(chong)電(dian)(dian)結束(shu)，則充(chong)電(dian)(dian)電(dian)(dian)流(liu)降為(wei)零。