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鋰電池一(yi)般(ban)是低電壓(ya)或者是沒有電壓(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(li)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(zai)30毫歐以下，根據測(ce)試(shi)內阻結果進行簡單對比也能區(qu)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)的(de)鋰(li)離(li)子電(dian)池(chi)的(de)金屬表面會有一定(ding)程度的(de)氧化，導致電(dian)池(chi)電(dian)極(ji)生(sheng)銹，使得電(dian)池(chi)與用(yong)電(dian)設備導線接(jie)觸(chu)不好，鋰(li)離(li)子電(dian)池(chi)使用(yong)時間(jian)變(bian)短，而用(yong)橡皮棕或其(qi)他清潔工具可擦除表面的(de)生(sheng)銹物質，可以降低電(dian)路(lu)電(dian)阻，提(ti)高導電(dian)率。

2、冷熱交替法修復18650鋰離子電池：低溫(wen)能使鋰離子(zi)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)內(nei)部的(de)電(dian)(dian)(dian)解液發(fa)(fa)生變化(hua)，促(cu)使剛剛經過(guo)冷凍(dong)的(de)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)發(fa)(fa)生化(hua)學(xue)反應(ying)。鋰離子(zi)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)的(de)使用過(guo)程其實是(shi)一個(ge)充(chong)放電(dian)(dian)(dian)過(guo)程。在這期(qi)間，18650電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)內(nei)的(de)陰電(dian)(dian)(dian)荷和陽(yang)電(dian)(dian)(dian)荷相互交(jiao)撞。電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)之所以會越來越不經用，是(shi)因為在正常(chang)的(de)室溫(wen)下，電(dian)(dian)(dian)子(zi)內(nei)部的(de)動能比較大，因而(er)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)處于活躍狀態(tai)，漏電(dian)(dian)(dian)情況相對頻繁(fan)。而(er)將鋰離子(zi)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)放入低溫(wen)環(huan)境(jing)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(wei)觀結構，以及它(ta)們的(de)交(jiao)界(jie)面(mian)都會發(fa)(fa)生分(fen)明(ming)變化(hua)，導(dao)致(zhi)電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)內(nei)部暫不活躍，漏電(dian)(dian)(dian)流減少。所以再次充(chong)電(dian)(dian)(dian)后(hou)，電(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)容量可以一定程度的(de)恢復。

3、深度放電法修復電池：對手機進(jin)行深度放電(dian)(dian)(dian)(dian)，就是通(tong)過耗盡內部電(dian)(dian)(dian)(dian)能，來(lai)達(da)到更深程度的(de)再充電(dian)(dian)(dian)(dian)，這要采用一些非常(chang)規的(de)辦法。想方法將18650電(dian)(dian)(dian)(dian)池與一個(ge)1.5V小燈泡相連，鋰離子電(dian)(dian)(dian)(dian)池內部的(de)電(dian)(dian)(dian)(dian)量會傳輸到小燈泡上，直到全部都(dou)放光(guang)。電(dian)(dian)(dian)(dian)池要通(tong)過較低的(de)電(dian)(dian)(dian)(dian)壓慢慢耗盡電(dian)(dian)(dian)(dian)能。放完電(dian)(dian)(dian)(dian)后，再次充電(dian)(dian)(dian)(dian)的(de)電(dian)(dian)(dian)(dian)池可以使用更長時間。

4、高壓充電辦法修復電池：用(yong)鋰離子(zi)電(dian)(dian)(dian)池(chi)高壓充(chong)(chong)電(dian)(dian)(dian)器(qi)（5V，300MA）充(chong)(chong)電(dian)(dian)(dian)5分鐘，充(chong)(chong)電(dian)(dian)(dian)器(qi)可以(yi)是手機充(chong)(chong)電(dian)(dian)(dian)器(qi)、充(chong)(chong)電(dian)(dian)(dian)頭，但是不(bu)能用(yong)萬能充(chong)(chong)電(dian)(dian)(dian)器(qi)，因為(wei)萬能充(chong)(chong)電(dian)(dian)(dian)器(qi)要識別電(dian)(dian)(dian)壓，五分鐘后，再次探測(ce)電(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)壓V，倘(tang)若(ruo)電(dian)(dian)(dian)壓升到1V，持續充(chong)(chong)電(dian)(dian)(dian)（每隔(ge)5分鐘一測(ce)電(dian)(dian)(dian)壓）。充(chong)(chong)電(dian)(dian)(dian)到3V。