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鋰電(dian)(dian)池一般(ban)是低電(dian)(dian)壓(ya)或者是沒有電(dian)(dian)壓(ya)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(li)電(dian)池內阻(zu)一般在(zai)30毫歐以下，根據(ju)測試內阻(zu)結(jie)果進行簡(jian)單(dan)對(dui)比也能區分電(dian)池的(de)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(chang)時(shi)間使用(yong)的鋰(li)離(li)子電(dian)(dian)池(chi)的金(jin)屬表(biao)面會有一定程度的氧化，導致(zhi)電(dian)(dian)池(chi)電(dian)(dian)極生銹，使得電(dian)(dian)池(chi)與(yu)用(yong)電(dian)(dian)設(she)備導線接觸不好，鋰(li)離(li)子電(dian)(dian)池(chi)使用(yong)時(shi)間變(bian)短，而(er)用(yong)橡皮(pi)棕或其他清潔工具可擦除表(biao)面的生銹物質(zhi)，可以(yi)降低電(dian)(dian)路電(dian)(dian)阻(zu)，提(ti)高導電(dian)(dian)率(lv)。

2、冷熱交替法修復18650鋰離子電池：低溫能使(shi)鋰(li)(li)離子(zi)(zi)(zi)(zi)電(dian)(dian)(dian)(dian)(dian)(dian)池內(nei)(nei)部(bu)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)解(jie)液發(fa)(fa)生變化(hua)(hua)，促使(shi)剛剛經過(guo)(guo)冷凍的(de)電(dian)(dian)(dian)(dian)(dian)(dian)池發(fa)(fa)生化(hua)(hua)學反應。鋰(li)(li)離子(zi)(zi)(zi)(zi)電(dian)(dian)(dian)(dian)(dian)(dian)池的(de)使(shi)用(yong)過(guo)(guo)程(cheng)(cheng)其實是(shi)一個充放電(dian)(dian)(dian)(dian)(dian)(dian)過(guo)(guo)程(cheng)(cheng)。在(zai)這(zhe)期間，18650電(dian)(dian)(dian)(dian)(dian)(dian)池內(nei)(nei)的(de)陰電(dian)(dian)(dian)(dian)(dian)(dian)荷和陽電(dian)(dian)(dian)(dian)(dian)(dian)荷相(xiang)互交(jiao)撞。電(dian)(dian)(dian)(dian)(dian)(dian)池之所以(yi)會越來越不經用(yong)，是(shi)因為(wei)在(zai)正常的(de)室(shi)溫下，電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi)內(nei)(nei)部(bu)的(de)動能比較(jiao)大(da)，因而電(dian)(dian)(dian)(dian)(dian)(dian)池處于活躍(yue)狀態，漏電(dian)(dian)(dian)(dian)(dian)(dian)情況相(xiang)對(dui)頻繁。而將鋰(li)(li)離子(zi)(zi)(zi)(zi)電(dian)(dian)(dian)(dian)(dian)(dian)池放入(ru)低溫環境里，鋰(li)(li)離子(zi)(zi)(zi)(zi)電(dian)(dian)(dian)(dian)(dian)(dian)池表面的(de)鋰(li)(li)膜(mo)與電(dian)(dian)(dian)(dian)(dian)(dian)解(jie)液的(de)微觀結構，以(yi)及(ji)它們(men)的(de)交(jiao)界(jie)面都會發(fa)(fa)生分明變化(hua)(hua)，導致(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)池內(nei)(nei)部(bu)暫不活躍(yue)，漏電(dian)(dian)(dian)(dian)(dian)(dian)流減少。所以(yi)再次充電(dian)(dian)(dian)(dian)(dian)(dian)后，電(dian)(dian)(dian)(dian)(dian)(dian)池容量可以(yi)一定程(cheng)(cheng)度(du)的(de)恢(hui)復(fu)。

3、深度放電法修復電池：對手(shou)機進行深度放(fang)電(dian)(dian)，就是通過耗盡(jin)內(nei)部(bu)電(dian)(dian)能(neng)，來達到(dao)更深程度的再充電(dian)(dian)，這要采用一些非常(chang)規的辦法(fa)。想方法(fa)將18650電(dian)(dian)池(chi)(chi)(chi)與(yu)一個1.5V小燈泡相(xiang)連，鋰離子電(dian)(dian)池(chi)(chi)(chi)內(nei)部(bu)的電(dian)(dian)量會傳(chuan)輸到(dao)小燈泡上，直(zhi)到(dao)全部(bu)都(dou)放(fang)光。電(dian)(dian)池(chi)(chi)(chi)要通過較低的電(dian)(dian)壓(ya)慢慢耗盡(jin)電(dian)(dian)能(neng)。放(fang)完(wan)電(dian)(dian)后，再次(ci)充電(dian)(dian)的電(dian)(dian)池(chi)(chi)(chi)可以使用更長時間。

4、高壓充電辦法修復電池：用(yong)鋰離(li)子電(dian)(dian)池高壓(ya)充(chong)電(dian)(dian)器(qi)(qi)（5V，300MA）充(chong)電(dian)(dian)5分鐘，充(chong)電(dian)(dian)器(qi)(qi)可(ke)以是(shi)手機充(chong)電(dian)(dian)器(qi)(qi)、充(chong)電(dian)(dian)頭，但是(shi)不能用(yong)萬能充(chong)電(dian)(dian)器(qi)(qi)，因為萬能充(chong)電(dian)(dian)器(qi)(qi)要識別電(dian)(dian)壓(ya)，五分鐘后，再次(ci)探測電(dian)(dian)池電(dian)(dian)壓(ya)V，倘若電(dian)(dian)壓(ya)升到1V，持續充(chong)電(dian)(dian)（每隔5分鐘一測電(dian)(dian)壓(ya)）。充(chong)電(dian)(dian)到3V。