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)池一般是低(di)電(dian)(dian)壓(ya)(ya)或者是沒有(you)電(dian)(dian)壓(ya)(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鋰電池內阻一(yi)般在30毫歐以下，根據測試內阻結果進(jin)行簡(jian)單對比也(ye)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(jian)使用(yong)(yong)的(de)鋰離子(zi)電(dian)(dian)池(chi)的(de)金屬表面會(hui)有一定(ding)程(cheng)度的(de)氧(yang)化(hua)，導(dao)致電(dian)(dian)池(chi)電(dian)(dian)極(ji)生銹，使得電(dian)(dian)池(chi)與用(yong)(yong)電(dian)(dian)設備導(dao)線接觸不好，鋰離子(zi)電(dian)(dian)池(chi)使用(yong)(yong)時間(jian)變(bian)短，而用(yong)(yong)橡皮(pi)棕或其他清潔工(gong)具可(ke)擦除表面的(de)生銹物質(zhi)，可(ke)以降(jiang)低(di)電(dian)(dian)路電(dian)(dian)阻，提(ti)高導(dao)電(dian)(dian)率。

2、冷熱交替法修復18650鋰離子電池：低(di)溫能使鋰(li)離(li)子(zi)(zi)電(dian)(dian)(dian)(dian)(dian)池(chi)內(nei)部(bu)(bu)的電(dian)(dian)(dian)(dian)(dian)解液(ye)發生變化(hua)，促(cu)使剛剛經(jing)(jing)過(guo)冷凍的電(dian)(dian)(dian)(dian)(dian)池(chi)發生化(hua)學反應。鋰(li)離(li)子(zi)(zi)電(dian)(dian)(dian)(dian)(dian)池(chi)的使用過(guo)程(cheng)(cheng)其(qi)實是(shi)(shi)一個(ge)充(chong)放電(dian)(dian)(dian)(dian)(dian)過(guo)程(cheng)(cheng)。在這期間，18650電(dian)(dian)(dian)(dian)(dian)池(chi)內(nei)的陰電(dian)(dian)(dian)(dian)(dian)荷(he)和陽電(dian)(dian)(dian)(dian)(dian)荷(he)相(xiang)互交撞。電(dian)(dian)(dian)(dian)(dian)池(chi)之所以(yi)會(hui)越來越不經(jing)(jing)用，是(shi)(shi)因(yin)為在正(zheng)常的室溫下，電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)內(nei)部(bu)(bu)的動能比較大，因(yin)而電(dian)(dian)(dian)(dian)(dian)池(chi)處(chu)于活(huo)躍狀態，漏電(dian)(dian)(dian)(dian)(dian)情況相(xiang)對頻繁。而將鋰(li)離(li)子(zi)(zi)電(dian)(dian)(dian)(dian)(dian)池(chi)放入低(di)溫環(huan)境里，鋰(li)離(li)子(zi)(zi)電(dian)(dian)(dian)(dian)(dian)池(chi)表面的鋰(li)膜與電(dian)(dian)(dian)(dian)(dian)解液(ye)的微觀結構，以(yi)及它們的交界面都會(hui)發生分明變化(hua)，導致電(dian)(dian)(dian)(dian)(dian)池(chi)內(nei)部(bu)(bu)暫不活(huo)躍，漏電(dian)(dian)(dian)(dian)(dian)流減少。所以(yi)再次充(chong)電(dian)(dian)(dian)(dian)(dian)后(hou)，電(dian)(dian)(dian)(dian)(dian)池(chi)容量可以(yi)一定程(cheng)(cheng)度的恢復(fu)。

3、深度放電法修復電池：對手機進行(xing)深度放(fang)(fang)電(dian)(dian)，就是通(tong)過(guo)耗盡內(nei)部(bu)電(dian)(dian)能(neng)，來(lai)達到更(geng)深程度的再充(chong)電(dian)(dian)，這要采用一(yi)些非常規的辦法(fa)。想方法(fa)將18650電(dian)(dian)池與一(yi)個(ge)1.5V小燈泡相連(lian)，鋰離子電(dian)(dian)池內(nei)部(bu)的電(dian)(dian)量會傳輸到小燈泡上，直(zhi)到全部(bu)都放(fang)(fang)光。電(dian)(dian)池要通(tong)過(guo)較低的電(dian)(dian)壓慢(man)慢(man)耗盡電(dian)(dian)能(neng)。放(fang)(fang)完(wan)電(dian)(dian)后，再次(ci)充(chong)電(dian)(dian)的電(dian)(dian)池可(ke)以使用更(geng)長時間。

4、高壓充電辦法修復電池：用(yong)(yong)鋰離子(zi)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)高壓(ya)(ya)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)（5V，300MA）充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)5分鐘(zhong)，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)可以是手機(ji)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)、充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)頭(tou)，但(dan)是不(bu)能(neng)用(yong)(yong)萬能(neng)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)，因為萬能(neng)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)要識別電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)，五分鐘(zhong)后，再次探測電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)V，倘若電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)升(sheng)到1V，持續充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)（每隔5分鐘(zhong)一測電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)）。充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)到3V。