我們購買或使(shi)用電(dian)池(chi)的(de)時候，經常會聽到關于電(dian)池(chi)的(de)放電(dian)平臺(tai)和工作電(dian)壓，以及電(dian)池(chi)的(de)充放電(dian)倍率這幾個概念，它們分別是指什么意(yi)思呢？了解它們有什么作用？

什么(me)是(shi)電池(chi)放電平臺?

簡單地說，在電(dian)(dian)池恒(heng)流放(fang)電(dian)(dian)時，電(dian)(dian)壓(ya)的變(bian)化是(shi)：下降(jiang)、平(ping)(ping)穩、下降(jiang)，其中的平(ping)(ping)穩階段(duan)就是(shi)放(fang)電(dian)(dian)平(ping)(ping)臺。

對于鋰電池而言，鋰(li)電(dian)池(chi)(chi)放(fang)(fang)電(dian)平臺主要表征的(de)是電(dian)池(chi)(chi)在滿荷(he)電(dian)狀態下、在制(zhi)定的(de)放(fang)(fang)電(dian)條件下(如倍率和溫度等(deng))放(fang)(fang)電(dian)至額定電(dian)壓的(de)時間或容量(liang)，這段(duan)時間越長(放(fang)(fang)電(dian)容量(liang)越大)表明鋰(li)電(dian)池(chi)(chi)放(fang)(fang)電(dian)平臺越高，即(ji)該電(dian)池(chi)(chi)性能(neng)越好。

一般規(gui)定(ding)，鋰電(dian)(dian)池放電(dian)(dian)平(ping)臺是恒(heng)壓(ya)充(chong)(chong)到(dao)電(dian)(dian)壓(ya)為4.2V并且電(dian)(dian)電(dian)(dian)流小于(yu)0.01C時(shi)停充(chong)(chong)電(dian)(dian)，然后擱置10分鐘(zhong)，在任何倍(bei)率的放電(dian)(dian)電(dian)(dian)流下(xia)放電(dian)(dian)至3.6V時(shi)的放電(dian)(dian)時(shi)間。是衡量電(dian)(dian)池好(hao)壞的重(zhong)要標(biao)準。

放電(dian)平(ping)(ping)臺曲線(xian)平(ping)(ping)滑無倒勾(gou)，且在(zai)一(yi)定電(dian)壓(ya)處的(de)(de)持續時(shi)間長，不(bu)同倍(bei)率下平(ping)(ping)臺電(dian)壓(ya)是(shi)(shi)不(bu)同的(de)(de)，但是(shi)(shi)不(bu)要一(yi)味的(de)(de)追(zhui)求高(gao)的(de)(de)平(ping)(ping)臺，有的(de)(de)時(shi)候平(ping)(ping)臺電(dian)壓(ya)高(gao)，反而是(shi)(shi)因(yin)為容(rong)量下降了(le)，所以，平(ping)(ping)臺的(de)(de)問題要多(duo)方面考(kao)慮，容(rong)量高(gao)且在(zai)某一(yi)電(dian)壓(ya)持續時(shi)間長，平(ping)(ping)臺電(dian)壓(ya)高(gao)，才算是(shi)(shi)好電(dian)池。

什么(me)是電池工作電壓?

又(you)稱端電(dian)(dian)(dian)壓(ya)，是指(zhi)電(dian)(dian)(dian)池(chi)在工作(zuo)狀(zhuang)態下即電(dian)(dian)(dian)路(lu)中(zhong)有電(dian)(dian)(dian)流(liu)過時(shi)(shi)電(dian)(dian)(dian)池(chi)正負極之間電(dian)(dian)(dian)勢(shi)差。在電(dian)(dian)(dian)池(chi)放(fang)電(dian)(dian)(dian)工作(zuo)狀(zhuang)態下，當電(dian)(dian)(dian)流(liu)流(liu)過電(dian)(dian)(dian)池(chi)內部時(shi)(shi)，不需克服電(dian)(dian)(dian)池(chi)的(de)內阻所造成阻力，故工作(zuo)電(dian)(dian)(dian)壓(ya)總(zong)是低于開路(lu)電(dian)(dian)(dian)池(chi)，充電(dian)(dian)(dian)時(shi)(shi)則與(yu)之相反。Li-ion的(de)放(fang)電(dian)(dian)(dian)工作(zuo)電(dian)(dian)(dian)壓(ya)在3.6V左右。

什(shen)么是(shi)(充放電)倍率?時率?

是指電池在(zai)規定(ding)的時(shi)間內放出其額(e)定(ding)容量(liang)時(shi)所需要的電流值，它在(zai)數(shu)據值上等于電池額(e)定(ding)容量(liang)的倍數(shu)，通常(chang)以(yi)字母(mu)C表示(shi)。如(ru)電池的標稱額(e)定(ding)容量(liang)為(wei)(wei)600mAh為(wei)(wei)1C(1倍率)，300mAh則為(wei)(wei)0.5C,6A(600mAh)為(wei)(wei)10C.以(yi)此類推.

時(shi)率又稱小時(shi)率,時(shi)指電(dian)(dian)池以一定(ding)(ding)(ding)的(de)(de)電(dian)(dian)流(liu)放(fang)完(wan)其額定(ding)(ding)(ding)容量所需要的(de)(de)小時(shi)數.如電(dian)(dian)池的(de)(de)額定(ding)(ding)(ding)容量為600mAh,以600mAh的(de)(de)電(dian)(dian)流(liu)放(fang)完(wan)其額定(ding)(ding)(ding)容量需1小時(shi),故稱600mAh的(de)(de)電(dian)(dian)流(liu)為1小時(shi)率,以此類推.