鋰電池的可用容量：

鋰電池的容量中還有一個對應的容量就是可用容量，可用容量實際上也許只用了80-90%！因為剛才講的是電池的化學容量，鋰電池的化學容量是在電流很小的時候測得的容量，它更多的是由電池本身的特性決定的。那實際在電池的使用過程中，這么多容量不是都能夠放得出來的，在實際的使用過程中，由于有一定的放電電流，所以放電曲線會比開路電壓曲線低，大家可以看到這條曲線，由于存在電池的內阻，實際的放電曲線是藍色的這條曲線，由藍色的曲線和紅色的曲線對應的值得到Quse，Quse實際指的是電池的可用容量，在這張曲線中我們發現，由于電池內阻的存在使這個曲線的位置往下移了，那么放電的時候會更早的達到放電終止電壓，也就是更早的達到EDV，所以Quse一般是小于Qmax。

從(cong)這(zhe)個曲線中(zhong)我們也可以看出，電(dian)流越大，Quse會越小.。在這(zhe)曲線當中(zhong)，Rbat就(jiu)是(shi)指的由于內阻的存在，造成電(dian)池端電(dian)壓的下降。

鋰電池的剩余(yu)容(rong)量：

RM在不(bu)同的(de)放電速率下是不(bu)一樣(yang)的(de)。

下(xia)面(mian)介紹的(de)(de)(de)(de)(de)是(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)(de)(de)(de)剩(sheng)(sheng)余(yu)容(rong)(rong)(rong)量(liang)(liang)。剩(sheng)(sheng)余(yu)容(rong)(rong)(rong)量(liang)(liang)是(shi)(shi)(shi)(shi)指(zhi)當前(qian)狀態放(fang)(fang)(fang)到(dao)EDV的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)容(rong)(rong)(rong)量(liang)(liang)，EDV也(ye)就(jiu)是(shi)(shi)(shi)(shi)終止放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)壓(ya)。圖中(zhong)當前(qian)狀態A在(zai)一(yi)(yi)個給定的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)流下(xia)進行放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)，放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)到(dao)3.0V的(de)(de)(de)(de)(de)時(shi)(shi)候，對(dui)(dui)應的(de)(de)(de)(de)(de)剩(sheng)(sheng)余(yu)容(rong)(rong)(rong)量(liang)(liang)從圖中(zhong)標出(chu)的(de)(de)(de)(de)(de)就(jiu)是(shi)(shi)(shi)(shi)R1。那(nei)如果在(zai)狀態A的(de)(de)(de)(de)(de)情況下(xia)，同比較大的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)流放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)，這(zhe)(zhe)個時(shi)(shi)候這(zhe)(zhe)個曲線(xian)的(de)(de)(de)(de)(de)位置(zhi)會(hui)比開(kai)路電(dian)(dian)(dian)(dian)(dian)壓(ya)更(geng)(geng)低(di)(di)(di)一(yi)(yi)點，也(ye)會(hui)比剛才的(de)(de)(de)(de)(de)小(xiao)(xiao)電(dian)(dian)(dian)(dian)(dian)流放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)RM1對(dui)(dui)應的(de)(de)(de)(de)(de)位置(zhi)更(geng)(geng)低(di)(di)(di)一(yi)(yi)點，那(nei)這(zhe)(zhe)個時(shi)(shi)候得到(dao)的(de)(de)(de)(de)(de)剩(sheng)(sheng)余(yu)容(rong)(rong)(rong)量(liang)(liang)是(shi)(shi)(shi)(shi)RM2。RM2和(he)RM1對(dui)(dui)應的(de)(de)(de)(de)(de)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)曲線(xian)它們的(de)(de)(de)(de)(de)區(qu)別在(zai)于(yu)使用(yong)(yong)的(de)(de)(de)(de)(de)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流是(shi)(shi)(shi)(shi)不(bu)(bu)(bu)一(yi)(yi)樣(yang)的(de)(de)(de)(de)(de)，放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流越(yue)大，曲線(xian)的(de)(de)(de)(de)(de)位置(zhi)越(yue)低(di)(di)(di)，剩(sheng)(sheng)余(yu)容(rong)(rong)(rong)量(liang)(liang)就(jiu)越(yue)小(xiao)(xiao)，所以電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)(de)(de)(de)剩(sheng)(sheng)余(yu)容(rong)(rong)(rong)量(liang)(liang)是(shi)(shi)(shi)(shi)與放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)速率有關的(de)(de)(de)(de)(de)，不(bu)(bu)(bu)同的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)流下(xia)面(mian)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)(de)(de)(de)剩(sheng)(sheng)余(yu)容(rong)(rong)(rong)量(liang)(liang)是(shi)(shi)(shi)(shi)不(bu)(bu)(bu)一(yi)(yi)樣(yang)的(de)(de)(de)(de)(de)。有的(de)(de)(de)(de)(de)用(yong)(yong)戶在(zai)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)(de)(de)(de)實際(ji)使用(yong)(yong)過程中(zhong)在(zai)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)情況下(xia)，會(hui)發現(xian)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)(de)(de)(de)容(rong)(rong)(rong)量(liang)(liang)由少變(bian)多(duo)，他感到(dao)不(bu)(bu)(bu)可(ke)理解，實際(ji)這(zhe)(zhe)里(li)可(ke)以解釋(shi)一(yi)(yi)下(xia)，這(zhe)(zhe)種情況是(shi)(shi)(shi)(shi)由于(yu)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流的(de)(de)(de)(de)(de)變(bian)化造成(cheng)的(de)(de)(de)(de)(de)，當我們看到(dao)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)容(rong)(rong)(rong)量(liang)(liang)由少變(bian)多(duo)的(de)(de)(de)(de)(de)情況，這(zhe)(zhe)個通常是(shi)(shi)(shi)(shi)由于(yu)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流突然變(bian)小(xiao)(xiao)造成(cheng)的(de)(de)(de)(de)(de)，因為在(zai)不(bu)(bu)(bu)同的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)流下(xia)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)可(ke)以放(fang)(fang)(fang)出(chu)的(de)(de)(de)(de)(de)容(rong)(rong)(rong)量(liang)(liang)是(shi)(shi)(shi)(shi)不(bu)(bu)(bu)一(yi)(yi)樣(yang)的(de)(de)(de)(de)(de)，當放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流變(bian)小(xiao)(xiao)的(de)(de)(de)(de)(de)時(shi)(shi)候，它可(ke)以放(fang)(fang)(fang)出(chu)的(de)(de)(de)(de)(de)容(rong)(rong)(rong)量(liang)(liang)是(shi)(shi)(shi)(shi)可(ke)以增(zeng)加的(de)(de)(de)(de)(de)。