電池放電深度是(shi)什么意(yi)思呢，其實這(zhe)個電池的放電深度有兩個層(ceng)面的解讀意(yi)思，一(yi)(yi)個是(shi)在電池健康使(shi)用安(an)全內的放電深度，另一(yi)(yi)個是(shi)超出電池使(shi)用健康安(an)全的放電深度。

1、電池健康(kang)使用安全內的放電深度(du)

放(fang)電(dian)(dian)深度(du)指從電(dian)(dian)池(chi)(chi)(chi)取出(chu)電(dian)(dian)量(liang)（放(fang)電(dian)(dian)量(liang)）占額(e)定容量(liang)的(de)百(bai)分比。淺循(xun)(xun)環電(dian)(dian)池(chi)(chi)(chi)的(de)放(fang)電(dian)(dian)深度(du)不應超過80%，深循(xun)(xun)環電(dian)(dian)池(chi)(chi)(chi)則(ze)可(ke)釋放(fang)100%的(de)電(dian)(dian)量(liang)。因(yin)為電(dian)(dian)池(chi)(chi)(chi)壽命受電(dian)(dian)池(chi)(chi)(chi)的(de)平均充電(dian)(dian)狀態所影響，因(yin)此(ci)我們在設計一(yi)個電(dian)(dian)池(chi)(chi)(chi)應用系統時必須(xu)協調(diao)好電(dian)(dian)池(chi)(chi)(chi)的(de)循(xun)(xun)環深度(du)和(he)容量(liang)之(zhi)間的(de)關系。

電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)有效容量(liang)(liang)的(de)一(yi)個重要限(xian)制是充放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)停(ting)(ting)止(zhi)條件(jian)。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)生產(chan)商指導(dao)用戶在電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)降到(dao)指定闌值時(shi)停(ting)(ting)止(zhi)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)。這導(dao)致(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)可用容量(liang)(liang)會隨著充放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流的(de)變化而變化。當以最小的(de)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流對電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)進行放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)時(shi)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)與其內部電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)或者(zhe)開(kai)路(lu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)相等，這是電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)SOC最好的(de)外部指標。當單(dan)體電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)達到(dao)低關斷(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)時(shi)，單(dan)體電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)真正放(fang)(fang)(fang)完(wan)額定容量(liang)(liang)。這這樣情況(kuang)下使用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)的(de)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)深度不會造成電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)理論衰減之外的(de)傷害。

2、超出電(dian)池(chi)使(shi)用健康安(an)全(quan)的放(fang)電(dian)深度有什(shen)么危害

電(dian)(dian)(dian)池(chi)在規定的(de)(de)(de)(de)(de)用電(dian)(dian)(dian)情況下用完電(dian)(dian)(dian)之后(hou)的(de)(de)(de)(de)(de)放(fang)(fang)電(dian)(dian)(dian)深度是(shi)(shi)100%，這(zhe)(zhe)個是(shi)(shi)對于當前使用情況下的(de)(de)(de)(de)(de)說法，但并不是(shi)(shi)說電(dian)(dian)(dian)池(chi)是(shi)(shi)完全沒有電(dian)(dian)(dian)量了(le)，而(er)是(shi)(shi)在這(zhe)(zhe)樣的(de)(de)(de)(de)(de)狀態下，剩(sheng)余(yu)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)量無(wu)法支撐(cheng)當前用電(dian)(dian)(dian)器(qi)使用。如(ru)果換成對電(dian)(dian)(dian)壓電(dian)(dian)(dian)流需求(qiu)更小(xiao)的(de)(de)(de)(de)(de)用電(dian)(dian)(dian)器(qi)來使用的(de)(de)(de)(de)(de)話，電(dian)(dian)(dian)池(chi)還是(shi)(shi)可以(yi)一(yi)定程度上繼(ji)續進行(xing)放(fang)(fang)電(dian)(dian)(dian)的(de)(de)(de)(de)(de)，但是(shi)(shi)這(zhe)(zhe)樣是(shi)(shi)超出了(le)安(an)全使用要求(qiu)標準的(de)(de)(de)(de)(de)，是(shi)(shi)屬于過(guo)放(fang)(fang)的(de)(de)(de)(de)(de)情況，這(zhe)(zhe)個對電(dian)(dian)(dian)池(chi)傷害(hai)比較大(da)(da)(da)，會大(da)(da)(da)大(da)(da)(da)減少電(dian)(dian)(dian)池(chi)的(de)(de)(de)(de)(de)使用循環壽(shou)命次數。

鋰(li)電池(chi)向任何電器(qi)定量(liang)供給電流(liu)(liu)時，電池(chi)內部的電阻會跟(gen)著容(rong)量(liang)的下(xia)降而添加，那當放電深度(du)較大時分，電阻添加而電流(liu)(liu)恒(heng)定，就(jiu)需求電池(chi)供給更(geng)多的電力(li)，并以熱(re)量(liang)的形(xing)式浪費掉。

鋰離子電(dian)(dian)池本來較為(wei)平穩放電(dian)(dian)曲(qu)線在放電(dian)(dian)深(shen)度較大時會急劇變化，因此，將放電(dian)(dian)深(shen)度限(xian)定在一(yi)個(ge)相對平整的范(fan)圍內(nei)，可以使顧(gu)客對電(dian)(dian)量有一(yi)個(ge)更好的把控，也能得到(dao)更好的運(yun)用(yong)體會。

在電(dian)(dian)(dian)池(chi)放電(dian)(dian)(dian)進(jin)程中需(xu)求注意(yi)問題(ti)，電(dian)(dian)(dian)池(chi)放電(dian)(dian)(dian)其實便(bian)是(shi)要弄清楚影響(xiang)鋰離子電(dian)(dian)(dian)池(chi)放電(dian)(dian)(dian)的因素，重要需(xu)求在放電(dian)(dian)(dian)時刻上面做好相關的操作，這樣也有(you)利于電(dian)(dian)(dian)池(chi)更持久的運用。

鋰(li)電(dian)池(chi)(chi)放(fang)電(dian)深度越深電(dian)池(chi)(chi)的(de)(de)損(sun)耗(hao)就(jiu)會(hui)越大(da)；鋰(li)電(dian)池(chi)(chi)充(chong)電(dian)充(chong)得(de)越滿(man)，電(dian)池(chi)(chi)的(de)(de)損(sun)耗(hao)也會(hui)越大(da)。電(dian)池(chi)(chi)最(zui)好是處于(yu)電(dian)量的(de)(de)中間狀態，那樣的(de)(de)話電(dian)池(chi)(chi)壽數最(zui)長。