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鋰電池(chi)一般(ban)是(shi)低電壓或者(zhe)是(shi)沒有(you)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(chi)內(nei)阻一般(ban)在30毫歐以下，根據測試內(nei)阻結果進行簡單對比也(ye)能區分電池(chi)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)用的鋰(li)離子(zi)電(dian)(dian)池(chi)(chi)的金屬表面會有一定程度(du)的氧化(hua)，導致電(dian)(dian)池(chi)(chi)電(dian)(dian)極(ji)生(sheng)銹(xiu)，使(shi)得(de)電(dian)(dian)池(chi)(chi)與(yu)用電(dian)(dian)設備(bei)導線接觸不(bu)好，鋰(li)離子(zi)電(dian)(dian)池(chi)(chi)使(shi)用時間變(bian)短，而(er)用橡(xiang)皮棕或其他清(qing)潔工具可擦(ca)除表面的生(sheng)銹(xiu)物質，可以降低電(dian)(dian)路(lu)電(dian)(dian)阻(zu)，提高導電(dian)(dian)率。

2、冷熱交替法修復18650鋰離子電池：低溫能(neng)使鋰(li)離(li)子(zi)電(dian)(dian)(dian)(dian)池(chi)(chi)內(nei)(nei)部的(de)(de)電(dian)(dian)(dian)(dian)解(jie)液發生變化，促使剛剛經(jing)過(guo)冷凍(dong)的(de)(de)電(dian)(dian)(dian)(dian)池(chi)(chi)發生化學反(fan)應。鋰(li)離(li)子(zi)電(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)使用過(guo)程其(qi)實是一(yi)個充放電(dian)(dian)(dian)(dian)過(guo)程。在這期間，18650電(dian)(dian)(dian)(dian)池(chi)(chi)內(nei)(nei)的(de)(de)陰電(dian)(dian)(dian)(dian)荷(he)和陽電(dian)(dian)(dian)(dian)荷(he)相互(hu)交撞。電(dian)(dian)(dian)(dian)池(chi)(chi)之所以(yi)會(hui)越來越不(bu)經(jing)用，是因為在正常的(de)(de)室溫下，電(dian)(dian)(dian)(dian)子(zi)內(nei)(nei)部的(de)(de)動能(neng)比較大，因而電(dian)(dian)(dian)(dian)池(chi)(chi)處于活躍狀態，漏電(dian)(dian)(dian)(dian)情況相對(dui)頻繁。而將鋰(li)離(li)子(zi)電(dian)(dian)(dian)(dian)池(chi)(chi)放入(ru)低溫環(huan)境里，鋰(li)離(li)子(zi)電(dian)(dian)(dian)(dian)池(chi)(chi)表面的(de)(de)鋰(li)膜與電(dian)(dian)(dian)(dian)解(jie)液的(de)(de)微(wei)觀結構，以(yi)及(ji)它們的(de)(de)交界面都會(hui)發生分明變化，導(dao)致電(dian)(dian)(dian)(dian)池(chi)(chi)內(nei)(nei)部暫不(bu)活躍，漏電(dian)(dian)(dian)(dian)流減少(shao)。所以(yi)再次(ci)充電(dian)(dian)(dian)(dian)后，電(dian)(dian)(dian)(dian)池(chi)(chi)容量可以(yi)一(yi)定程度的(de)(de)恢復。

3、深度放電法修復電池：對手(shou)機進行深度(du)放(fang)(fang)電(dian)，就(jiu)是通過耗(hao)(hao)盡內部電(dian)能，來達到(dao)更深程度(du)的(de)再充電(dian)，這要采用(yong)一些非常(chang)規的(de)辦法(fa)。想方法(fa)將18650電(dian)池與一個1.5V小燈(deng)泡(pao)相(xiang)連，鋰(li)離子電(dian)池內部的(de)電(dian)量會傳輸到(dao)小燈(deng)泡(pao)上(shang)，直到(dao)全部都放(fang)(fang)光。電(dian)池要通過較低的(de)電(dian)壓(ya)慢慢耗(hao)(hao)盡電(dian)能。放(fang)(fang)完電(dian)后，再次充電(dian)的(de)電(dian)池可以使用(yong)更長時間。

4、高壓充電辦法修復電池：用鋰離(li)子(zi)電(dian)(dian)(dian)池高壓(ya)(ya)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)器(qi)（5V，300MA）充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)5分(fen)鐘(zhong)，充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)器(qi)可以(yi)是(shi)手(shou)機充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)器(qi)、充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)頭，但是(shi)不能(neng)用萬能(neng)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)器(qi)，因為萬能(neng)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)器(qi)要識別(bie)電(dian)(dian)(dian)壓(ya)(ya)，五(wu)分(fen)鐘(zhong)后(hou)，再次(ci)探測(ce)電(dian)(dian)(dian)池電(dian)(dian)(dian)壓(ya)(ya)V，倘若電(dian)(dian)(dian)壓(ya)(ya)升(sheng)到1V，持續充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)（每(mei)隔(ge)5分(fen)鐘(zhong)一(yi)測(ce)電(dian)(dian)(dian)壓(ya)(ya)）。充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)到3V。