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(dian)池(chi)一(yi)般是低電(dian)壓或(huo)者是沒有電(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(yi)下，根據測(ce)試內阻結果進行簡單對比也能區分電池的好壞(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(chang)時(shi)間(jian)使用的(de)(de)(de)鋰離(li)子(zi)電(dian)(dian)(dian)池(chi)(chi)的(de)(de)(de)金屬表面(mian)會有一(yi)定程度(du)的(de)(de)(de)氧化，導(dao)致電(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)極生(sheng)(sheng)銹，使得電(dian)(dian)(dian)池(chi)(chi)與(yu)用電(dian)(dian)(dian)設備導(dao)線接觸不好，鋰離(li)子(zi)電(dian)(dian)(dian)池(chi)(chi)使用時(shi)間(jian)變短，而用橡皮棕或其(qi)他清潔(jie)工具可擦(ca)除(chu)表面(mian)的(de)(de)(de)生(sheng)(sheng)銹物質，可以降低電(dian)(dian)(dian)路電(dian)(dian)(dian)阻，提高(gao)導(dao)電(dian)(dian)(dian)率(lv)。

2、冷熱交替法修復18650鋰離子電池：低溫能使鋰離子(zi)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)內部的(de)電(dian)(dian)(dian)解液發生(sheng)變(bian)化(hua)，促使剛剛經過(guo)冷凍的(de)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)發生(sheng)化(hua)學(xue)反應。鋰離子(zi)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)的(de)使用過(guo)程(cheng)其實是一個充放電(dian)(dian)(dian)過(guo)程(cheng)。在這期間，18650電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)內的(de)陰電(dian)(dian)(dian)荷和陽電(dian)(dian)(dian)荷相(xiang)互交撞。電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)之所(suo)以會(hui)越(yue)來越(yue)不經用，是因為(wei)在正常的(de)室(shi)溫下(xia)，電(dian)(dian)(dian)子(zi)內部的(de)動能比(bi)較大(da)，因而電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)處(chu)于活(huo)躍狀態(tai)，漏電(dian)(dian)(dian)情況相(xiang)對頻繁(fan)。而將(jiang)鋰離子(zi)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)放入(ru)低溫環境里，鋰離子(zi)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)表面(mian)的(de)鋰膜與電(dian)(dian)(dian)解液的(de)微觀結構，以及它們的(de)交界面(mian)都會(hui)發生(sheng)分明變(bian)化(hua)，導致電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)內部暫不活(huo)躍，漏電(dian)(dian)(dian)流減少。所(suo)以再次充電(dian)(dian)(dian)后，電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)容量可以一定程(cheng)度的(de)恢復。

3、深度放電法修復電池：對手(shou)機進行(xing)深(shen)度放(fang)電(dian)(dian)(dian)，就(jiu)是通過耗盡內部電(dian)(dian)(dian)能，來達到(dao)更(geng)深(shen)程度的再(zai)充電(dian)(dian)(dian)，這(zhe)要采用一些非(fei)常(chang)規(gui)的辦法。想方法將18650電(dian)(dian)(dian)池與(yu)一個1.5V小燈泡(pao)相(xiang)連(lian)，鋰離子電(dian)(dian)(dian)池內部的電(dian)(dian)(dian)量會傳(chuan)輸到(dao)小燈泡(pao)上，直(zhi)到(dao)全(quan)部都放(fang)光。電(dian)(dian)(dian)池要通過較低的電(dian)(dian)(dian)壓慢慢耗盡電(dian)(dian)(dian)能。放(fang)完電(dian)(dian)(dian)后，再(zai)次充電(dian)(dian)(dian)的電(dian)(dian)(dian)池可(ke)以使(shi)用更(geng)長(chang)時間。

4、高壓充電辦法修復電池：用(yong)鋰離子電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)高壓(ya)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)（5V，300MA）充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)5分(fen)鐘(zhong)，充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)可以是手機充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)、充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)頭，但是不能(neng)用(yong)萬能(neng)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)，因為萬能(neng)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)要識別電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)，五分(fen)鐘(zhong)后(hou)，再次探測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)V，倘若電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)升到1V，持續充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)（每隔5分(fen)鐘(zhong)一測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)）。充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)到3V。