一、18650鋰電池怎么測量好壞

1、準備好萬用表，將萬用表表筆分別接觸18650電池的正負極，進行簡單的電壓測試，一般好的18650鋰電池的電壓在3.20V左右，壞的18650鋰(li)電池一(yi)般是(shi)低(di)電壓或者是(shi)沒有電壓的。

2、準備好內阻測試儀，將18650鋰電池放到內阻測試夾具上進行內阻測試，壞的18650鋰電池沒有內阻或者內阻阻值很小很小，而好的18650鋰電池內(nei)阻一般在(zai)30毫(hao)歐以下，根據測試內(nei)阻結果進行簡單對比也能區分電池的好壞。

二、18650鋰電池壞了怎么修復

1、18650鋰離子電池表面有鐵銹的修復辦法：長時間使(shi)用(yong)(yong)的鋰離子電(dian)(dian)池的金屬表(biao)面會有一(yi)定程度(du)的氧化，導(dao)(dao)致電(dian)(dian)池電(dian)(dian)極(ji)生銹(xiu)，使(shi)得電(dian)(dian)池與用(yong)(yong)電(dian)(dian)設備導(dao)(dao)線接觸(chu)不好(hao)，鋰離子電(dian)(dian)池使(shi)用(yong)(yong)時間變短，而用(yong)(yong)橡(xiang)皮棕(zong)或其他清潔工具可(ke)擦除表(biao)面的生銹(xiu)物(wu)質，可(ke)以降低電(dian)(dian)路電(dian)(dian)阻，提高導(dao)(dao)電(dian)(dian)率。

2、冷熱交替法修復18650鋰離子電池：低溫能使(shi)鋰(li)離(li)(li)子電(dian)(dian)(dian)(dian)池內(nei)(nei)部(bu)(bu)的(de)(de)電(dian)(dian)(dian)(dian)解液發(fa)生變化(hua)，促使(shi)剛(gang)剛(gang)經過(guo)冷凍的(de)(de)電(dian)(dian)(dian)(dian)池發(fa)生化(hua)學反應。鋰(li)離(li)(li)子電(dian)(dian)(dian)(dian)池的(de)(de)使(shi)用(yong)過(guo)程其實是一個充放電(dian)(dian)(dian)(dian)過(guo)程。在(zai)這期(qi)間，18650電(dian)(dian)(dian)(dian)池內(nei)(nei)的(de)(de)陰電(dian)(dian)(dian)(dian)荷和陽電(dian)(dian)(dian)(dian)荷相互交撞。電(dian)(dian)(dian)(dian)池之(zhi)所以會越來(lai)越不(bu)(bu)經用(yong)，是因(yin)為在(zai)正常的(de)(de)室溫下(xia)，電(dian)(dian)(dian)(dian)子內(nei)(nei)部(bu)(bu)的(de)(de)動能比(bi)較大，因(yin)而電(dian)(dian)(dian)(dian)池處于(yu)活躍狀態，漏電(dian)(dian)(dian)(dian)情況相對(dui)頻繁。而將鋰(li)離(li)(li)子電(dian)(dian)(dian)(dian)池放入低溫環境里，鋰(li)離(li)(li)子電(dian)(dian)(dian)(dian)池表面(mian)的(de)(de)鋰(li)膜(mo)與電(dian)(dian)(dian)(dian)解液的(de)(de)微觀結(jie)構(gou)，以及它們的(de)(de)交界面(mian)都(dou)會發(fa)生分明變化(hua)，導致電(dian)(dian)(dian)(dian)池內(nei)(nei)部(bu)(bu)暫不(bu)(bu)活躍，漏電(dian)(dian)(dian)(dian)流減少。所以再次充電(dian)(dian)(dian)(dian)后，電(dian)(dian)(dian)(dian)池容量可(ke)以一定程度的(de)(de)恢復(fu)。

3、深度放電法修復電池：對(dui)手機進行深度(du)放電(dian)(dian)(dian)，就(jiu)是通過(guo)耗(hao)盡內(nei)部電(dian)(dian)(dian)能，來達到(dao)更深程(cheng)度(du)的(de)(de)(de)再(zai)充電(dian)(dian)(dian)，這要采用一些(xie)非常規的(de)(de)(de)辦法。想(xiang)方法將18650電(dian)(dian)(dian)池(chi)(chi)與一個1.5V小燈泡相連(lian)，鋰離子電(dian)(dian)(dian)池(chi)(chi)內(nei)部的(de)(de)(de)電(dian)(dian)(dian)量會傳輸到(dao)小燈泡上，直(zhi)到(dao)全部都放光。電(dian)(dian)(dian)池(chi)(chi)要通過(guo)較低的(de)(de)(de)電(dian)(dian)(dian)壓(ya)慢(man)慢(man)耗(hao)盡電(dian)(dian)(dian)能。放完(wan)電(dian)(dian)(dian)后，再(zai)次充電(dian)(dian)(dian)的(de)(de)(de)電(dian)(dian)(dian)池(chi)(chi)可(ke)以(yi)使(shi)用更長時間。

4、高壓充電辦法修復電池：用鋰離子電(dian)池高壓(ya)充(chong)(chong)(chong)電(dian)器（5V，300MA）充(chong)(chong)(chong)電(dian)5分鐘，充(chong)(chong)(chong)電(dian)器可以是手機充(chong)(chong)(chong)電(dian)器、充(chong)(chong)(chong)電(dian)頭，但是不(bu)能(neng)(neng)用萬能(neng)(neng)充(chong)(chong)(chong)電(dian)器，因為萬能(neng)(neng)充(chong)(chong)(chong)電(dian)器要識別電(dian)壓(ya)，五分鐘后，再(zai)次探測電(dian)池電(dian)壓(ya)V，倘(tang)若電(dian)壓(ya)升到1V，持續充(chong)(chong)(chong)電(dian)（每隔5分鐘一測電(dian)壓(ya)）。充(chong)(chong)(chong)電(dian)到3V。