一、18650鋰電池充電電壓是多少

4.2V是電池充電的最高限制電壓。18650鋰電池的(de)(de)電(dian)壓(ya)一(yi)般都(dou)在(zai)3.6V、3.8V和4.2V，遠高(gao)于鎳(nie)鎘(ge)和鎳(nie)氫(qing)電(dian)池的(de)(de)1.2V電(dian)壓(ya)。

一般(ban)認為將鋰電(dian)(dian)池(chi)的空載電(dian)(dian)壓(ya)充(chong)到(dao)4.2V就(jiu)認為電(dian)(dian)充(chong)滿了，電(dian)(dian)池(chi)充(chong)電(dian)(dian)過程中,電(dian)(dian)池(chi)的電(dian)(dian)壓(ya)在3.7V逐漸(jian)上升到(dao)4.2V，鋰電(dian)(dian)池(chi)充(chong)電(dian)(dian)不(bu)能將空載電(dian)(dian)壓(ya)充(chong)到(dao)4.2V以上的，否則(ze)也(ye)會損害電(dian)(dian)池(chi)，這就(jiu)是鋰電(dian)(dian)池(chi)特殊的地方。

鋰離子電池充(chong)(chong)電(dian)(dian)(dian)(dian)過程分為恒(heng)流(liu)(liu)(liu)快(kuai)充(chong)(chong)階段和恒(heng)壓電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)下降階段。恒(heng)流(liu)(liu)(liu)快(kuai)速(su)充(chong)(chong)電(dian)(dian)(dian)(dian)階段，電(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)壓逐漸上(shang)升至電(dian)(dian)(dian)(dian)池(chi)標(biao)準電(dian)(dian)(dian)(dian)壓，然后在控制芯片的控制下進入恒(heng)壓階段。電(dian)(dian)(dian)(dian)量統(tong)計芯片通(tong)過對放(fang)電(dian)(dian)(dian)(dian)曲(qu)線(xian)的記錄，可以(yi)對電(dian)(dian)(dian)(dian)池(chi)進行采樣計算。鋰離(li)子電(dian)(dian)(dian)(dian)池(chi)使用次數多了，放(fang)電(dian)(dian)(dian)(dian)曲(qu)線(xian)就會發生(sheng)變化，雖然鋰離(li)子電(dian)(dian)(dian)(dian)池(chi)沒有記憶效應，但如果充(chong)(chong)電(dian)(dian)(dian)(dian)不(bu)當(dang)，會對電(dian)(dian)(dian)(dian)池(chi)的性能造成很大的影響(xiang)。

二、18650鋰電池充不進電怎么修復

造成18650充(chong)不(bu)進(jin)電(dian)(dian)的原(yuan)因有電(dian)(dian)池(chi)的電(dian)(dian)極觸(chu)點生(sheng)銹(xiu)或是不(bu)干凈，導(dao)致(zhi)接觸(chu)電(dian)(dian)阻太大(da)(da)造成壓降太大(da)(da)，使得充(chong)電(dian)(dian)時充(chong)電(dian)(dian)裝置認為已經充(chong)滿電(dian)(dian)而(er)對其停止(zhi)充(chong)電(dian)(dian)，這種情(qing)況只(zhi)需要將電(dian)(dian)極觸(chu)電(dian)(dian)進(jin)行清潔即可。

排除電(dian)池本身問(wen)題(ti)的情況下，檢(jian)查(cha)是否是充電(dian)器(qi)或是充電(dian)線存在問(wen)題(ti)，如果有其(qi)他充電(dian)設備可(ke)以更換一下試(shi)試(shi)，因為充電(dian)器(qi)和線出(chu)現(xian)故障(zhang)也會引起18650充不進電(dian)。

如(ru)果是內部電(dian)(dian)(dian)路、電(dian)(dian)(dian)池本(ben)身以及電(dian)(dian)(dian)池壽命(ming)問題導致充(chong)不進電(dian)(dian)(dian)，建議(yi)直(zhi)接(jie)更換電(dian)(dian)(dian)池。如(ru)果你非(fei)要拆解(jie)18650電(dian)(dian)(dian)池的話(hua)，要把(ba)電(dian)(dian)(dian)池中的電(dian)(dian)(dian)全部放掉，不過強烈建議(yi)不要進行這(zhe)樣的操作(zuo)。