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(shi)低(di)電(dian)(dian)壓或者是(shi)沒(mei)有電(dian)(dian)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鋰電池內阻一般在30毫歐以下，根(gen)據測試內阻結(jie)果進行簡(jian)單(dan)對比(bi)也能區(qu)分電池的好(hao)壞(huai)。

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(shi)間(jian)使(shi)用(yong)(yong)的(de)鋰(li)離子(zi)電(dian)(dian)(dian)池的(de)金屬(shu)表(biao)面會有一定程度的(de)氧化，導(dao)(dao)致電(dian)(dian)(dian)池電(dian)(dian)(dian)極(ji)生銹，使(shi)得電(dian)(dian)(dian)池與(yu)用(yong)(yong)電(dian)(dian)(dian)設備(bei)導(dao)(dao)線接(jie)觸不好，鋰(li)離子(zi)電(dian)(dian)(dian)池使(shi)用(yong)(yong)時(shi)間(jian)變短(duan)，而用(yong)(yong)橡皮棕(zong)或其他清潔(jie)工(gong)具(ju)可(ke)擦除表(biao)面的(de)生銹物質，可(ke)以降低電(dian)(dian)(dian)路電(dian)(dian)(dian)阻，提高導(dao)(dao)電(dian)(dian)(dian)率。

2、冷熱交替法修復18650鋰離子電池：低溫能使鋰(li)離子電(dian)(dian)(dian)池(chi)(chi)(chi)內(nei)(nei)部的(de)(de)電(dian)(dian)(dian)解液發生變化，促使剛剛經(jing)(jing)過冷凍的(de)(de)電(dian)(dian)(dian)池(chi)(chi)(chi)發生化學反應。鋰(li)離子電(dian)(dian)(dian)池(chi)(chi)(chi)的(de)(de)使用過程(cheng)(cheng)其實(shi)是(shi)一個充(chong)放電(dian)(dian)(dian)過程(cheng)(cheng)。在這期間，18650電(dian)(dian)(dian)池(chi)(chi)(chi)內(nei)(nei)的(de)(de)陰電(dian)(dian)(dian)荷(he)和陽電(dian)(dian)(dian)荷(he)相(xiang)互交撞。電(dian)(dian)(dian)池(chi)(chi)(chi)之所以會(hui)越來越不經(jing)(jing)用，是(shi)因為在正常(chang)的(de)(de)室溫下，電(dian)(dian)(dian)子內(nei)(nei)部的(de)(de)動能比(bi)較大，因而(er)電(dian)(dian)(dian)池(chi)(chi)(chi)處(chu)于活(huo)躍狀態，漏電(dian)(dian)(dian)情況相(xiang)對頻(pin)繁。而(er)將(jiang)鋰(li)離子電(dian)(dian)(dian)池(chi)(chi)(chi)放入低溫環境里(li)，鋰(li)離子電(dian)(dian)(dian)池(chi)(chi)(chi)表(biao)面(mian)的(de)(de)鋰(li)膜與(yu)電(dian)(dian)(dian)解液的(de)(de)微觀結構，以及它們的(de)(de)交界(jie)面(mian)都會(hui)發生分(fen)明變化，導致電(dian)(dian)(dian)池(chi)(chi)(chi)內(nei)(nei)部暫(zan)不活(huo)躍，漏電(dian)(dian)(dian)流減(jian)少。所以再次(ci)充(chong)電(dian)(dian)(dian)后，電(dian)(dian)(dian)池(chi)(chi)(chi)容量(liang)可以一定程(cheng)(cheng)度的(de)(de)恢復。

3、深度放電法修復電池：對(dui)手機進行深(shen)度放(fang)(fang)電(dian)，就是(shi)通(tong)過耗(hao)盡內部(bu)電(dian)能，來達到更(geng)(geng)深(shen)程度的(de)再充電(dian)，這要采用一些非常規的(de)辦法(fa)。想(xiang)方法(fa)將(jiang)18650電(dian)池與一個1.5V小燈(deng)泡(pao)相(xiang)連，鋰離子電(dian)池內部(bu)的(de)電(dian)量會傳(chuan)輸到小燈(deng)泡(pao)上，直到全部(bu)都放(fang)(fang)光。電(dian)池要通(tong)過較(jiao)低的(de)電(dian)壓慢慢耗(hao)盡電(dian)能。放(fang)(fang)完電(dian)后，再次(ci)充電(dian)的(de)電(dian)池可以使用更(geng)(geng)長時(shi)間(jian)。

4、高壓充電辦法修復電池：用鋰離(li)子電池高壓(ya)(ya)(ya)充(chong)(chong)電器(qi)(qi)（5V，300MA）充(chong)(chong)電5分(fen)鐘，充(chong)(chong)電器(qi)(qi)可以是(shi)手(shou)機充(chong)(chong)電器(qi)(qi)、充(chong)(chong)電頭，但是(shi)不能用萬能充(chong)(chong)電器(qi)(qi)，因為萬能充(chong)(chong)電器(qi)(qi)要識別電壓(ya)(ya)(ya)，五分(fen)鐘后，再次探測(ce)電池電壓(ya)(ya)(ya)V，倘(tang)若(ruo)電壓(ya)(ya)(ya)升(sheng)到1V，持(chi)續充(chong)(chong)電（每隔(ge)5分(fen)鐘一測(ce)電壓(ya)(ya)(ya)）。充(chong)(chong)電到3V。