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)池一般(ban)是(shi)低電(dian)壓或者是(shi)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(li)電池沒有內阻或者內阻阻值很小很小，而好的18650鋰(li)電池內阻一(yi)般在30毫歐以下，根據測試內阻結果進行簡單對比也能區分電池的(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：長時間使(shi)用的鋰(li)(li)離子電(dian)(dian)池(chi)的金屬表(biao)面(mian)(mian)會有(you)一(yi)定程(cheng)度的氧(yang)化(hua)，導致電(dian)(dian)池(chi)電(dian)(dian)極生銹(xiu)，使(shi)得電(dian)(dian)池(chi)與用電(dian)(dian)設備導線接(jie)觸不好(hao)，鋰(li)(li)離子電(dian)(dian)池(chi)使(shi)用時間變短，而用橡皮(pi)棕或其他清潔工具(ju)可擦除表(biao)面(mian)(mian)的生銹(xiu)物質，可以降低電(dian)(dian)路電(dian)(dian)阻，提高(gao)導電(dian)(dian)率。

2、冷熱交替法修復18650鋰離子電池：低溫(wen)能使(shi)(shi)鋰離子(zi)電(dian)(dian)池(chi)內部(bu)的(de)(de)電(dian)(dian)解(jie)液發生變化，促使(shi)(shi)剛(gang)剛(gang)經(jing)(jing)過冷凍的(de)(de)電(dian)(dian)池(chi)發生化學反(fan)應(ying)。鋰離子(zi)電(dian)(dian)池(chi)的(de)(de)使(shi)(shi)用(yong)過程其實是(shi)(shi)一個充放(fang)電(dian)(dian)過程。在(zai)這期間，18650電(dian)(dian)池(chi)內的(de)(de)陰電(dian)(dian)荷和陽(yang)電(dian)(dian)荷相互交(jiao)撞(zhuang)。電(dian)(dian)池(chi)之所以會越來越不經(jing)(jing)用(yong)，是(shi)(shi)因為在(zai)正常的(de)(de)室溫(wen)下，電(dian)(dian)子(zi)內部(bu)的(de)(de)動能比較大，因而電(dian)(dian)池(chi)處(chu)于活躍狀(zhuang)態，漏電(dian)(dian)情況(kuang)相對(dui)頻繁。而將(jiang)鋰離子(zi)電(dian)(dian)池(chi)放(fang)入低溫(wen)環境(jing)里，鋰離子(zi)電(dian)(dian)池(chi)表面(mian)的(de)(de)鋰膜與電(dian)(dian)解(jie)液的(de)(de)微觀(guan)結構，以及它們的(de)(de)交(jiao)界面(mian)都會發生分明變化，導(dao)致電(dian)(dian)池(chi)內部(bu)暫不活躍，漏電(dian)(dian)流(liu)減少。所以再次充電(dian)(dian)后，電(dian)(dian)池(chi)容量可以一定(ding)程度的(de)(de)恢復。

3、深度放電法修復電池：對手機進(jin)行深度(du)放電(dian)(dian)(dian)，就是通(tong)過耗盡內(nei)部(bu)電(dian)(dian)(dian)能，來達到(dao)更深程度(du)的(de)(de)再充電(dian)(dian)(dian)，這要采(cai)用一(yi)些非常規的(de)(de)辦法(fa)。想方法(fa)將18650電(dian)(dian)(dian)池與一(yi)個1.5V小燈泡相(xiang)連，鋰(li)離(li)子(zi)電(dian)(dian)(dian)池內(nei)部(bu)的(de)(de)電(dian)(dian)(dian)量會傳輸到(dao)小燈泡上，直到(dao)全部(bu)都放光(guang)。電(dian)(dian)(dian)池要通(tong)過較(jiao)低(di)的(de)(de)電(dian)(dian)(dian)壓慢慢耗盡電(dian)(dian)(dian)能。放完電(dian)(dian)(dian)后，再次充電(dian)(dian)(dian)的(de)(de)電(dian)(dian)(dian)池可以(yi)使用更長時間。

4、高壓充電辦法修復電池：用鋰離子電(dian)(dian)(dian)(dian)池高(gao)壓(ya)(ya)(ya)充(chong)電(dian)(dian)(dian)(dian)器（5V，300MA）充(chong)電(dian)(dian)(dian)(dian)5分(fen)鐘，充(chong)電(dian)(dian)(dian)(dian)器可(ke)以是(shi)(shi)手機充(chong)電(dian)(dian)(dian)(dian)器、充(chong)電(dian)(dian)(dian)(dian)頭，但是(shi)(shi)不(bu)能用萬能充(chong)電(dian)(dian)(dian)(dian)器，因為萬能充(chong)電(dian)(dian)(dian)(dian)器要識別電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)，五分(fen)鐘后，再次探測電(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)V，倘若電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)升到1V，持續充(chong)電(dian)(dian)(dian)(dian)（每隔5分(fen)鐘一測電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)）。充(chong)電(dian)(dian)(dian)(dian)到3V。