電池容量指的是電量大小，也可以理解為“容積”，下面從電池容量單位、電池容量計算、電池容量檢測、電池容量kwh等這幾方面來深入理解電池容量的具體含義。

1、電池容量單(dan)位

鋰(li)電池的容量單位是(shi)毫安時(shi)，安時(shi)，瓦時(shi)。

用符(fu)合表示：毫(hao)安(an)時mah（MAH）；安(an)時ah（AH）；瓦時Wh。

通(tong)俗點講電池(chi)容量的物理意思就是指該(gai)電池(chi)能夠容納或釋(shi)放多少(shao)電荷，我們常(chang)用Ah（安時）或mAh（毫安時）來表示。

根據電(dian)流的(de)定義式(shi)：I＝Q／t，可知Q＝It，電(dian)流I的(de)單(dan)(dan)位(wei)時mA（毫安），t代表的(de)是時間(jian)，單(dan)(dan)位(wei)hour(時)，因此我(wo)們的(de)電(dian)池容量單(dan)(dan)位(wei)就為mAh。

也就(jiu)是說如果(guo)一塊電(dian)池容量表示1000mAh，如果(guo)他工作時的電(dian)流時100mA，則理論(lun)上可以供電(dian)使用10小時。

不過從公式中我們(men)可(ke)以(yi)看(kan)到Q=It，并未(wei)涉及(ji)到電(dian)(dian)(dian)壓，因(yin)此這一單位只能(neng)說(shuo)明(ming)(ming)電(dian)(dian)(dian)池(chi)內(nei)部能(neng)夠(gou)容納多少庫侖的(de)電(dian)(dian)(dian)荷(he)。但不能(neng)說(shuo)明(ming)(ming)這個電(dian)(dian)(dian)池(chi)能(neng)夠(gou)做多少的(de)功(gong)，以(yi)及(ji)電(dian)(dian)(dian)池(chi)可(ke)提供(gong)的(de)最大(da)功(gong)率是(shi)多少。不同(tong)(tong)類型的(de)產品的(de)工作電(dian)(dian)(dian)壓是(shi)不同(tong)(tong)的(de)。因(yin)此我們(men)有常常會看(kan)到在mAh的(de)旁(pang)邊還(huan)會有一個以(yi)Wh為單位的(de)數字。電(dian)(dian)(dian)池(chi)可(ke)做的(de)功(gong)W=UIt=UQ，電(dian)(dian)(dian)壓U*電(dian)(dian)(dian)流I的(de)單位為W（瓦），因(yin)此電(dian)(dian)(dian)池(chi)里的(de)W用Wh來表示，它表示電(dian)(dian)(dian)池(chi)能(neng)夠(gou)做多少的(de)功(gong)。

2、電池容量(liang)計算(suan)

電(dian)(dian)池(chi)容量(liang)（C）的(de)計算方(fang)法：容量(liang)C=放電(dian)(dian)電(dian)(dian)池(chi)（恒流）Ix放電(dian)(dian)時間（小(xiao)(xiao)時）T反過來(lai)：放電(dian)(dian)時間T=容量(liang)C/放電(dian)(dian)電(dian)(dian)流（恒流）I比如一個電(dian)(dian)池(chi)用500MA（毫安(an)）的(de)恒定電(dian)(dian)流放了2個小(xiao)(xiao)時，那(nei)么這個電(dian)(dian)池(chi)的(de)容量(liang)就(jiu)等于500MA*2H=1000MAH=1AH再如一個電(dian)(dian)池(chi)用5安(an)的(de)電(dian)(dian)流放了2個小(xiao)(xiao)時，那(nei)么該電(dian)(dian)池(chi)的(de)容量(liang)就(jiu)是10AH。

3、電(dian)池容量和功率(lv)換算(suan)

從單(dan)位(wei)來(lai)看功(gong)率的單(dan)位(wei)瓦特（W），由(you)P=UI，1W=1V.A（一(yi)瓦等于(yu)一(yi)伏(fu)安）電(dian)池(chi)容量mA.h（毫安時）很(hen)明(ming)顯(xian)這(zhe)兩個部(bu)位(wei)不同。

進一步找(zhao)找(zhao)關系(xi)：

電(dian)能電(dian)功單位(wei)焦耳（J）由W=Pt可知(zhi)：1.J=1W.s=1V.A.s（一焦等于一伏安秒）如(ru)果電(dian)池(chi)的(de)(de)電(dian)壓已知(zhi)，用電(dian)壓乘以電(dian)池(chi)容量你看(kan)看(kan)得到什么：單位(wei)V.m.A.h其實和電(dian)能的(de)(de)單位(wei)本質(zhi)是一樣(yang)的(de)(de)，換算下：

1V.mA.h=1V*10^-3A*3600s=3.6V.A.s=3.6.7

蓄電池容量kwh什么(me)意思

蓄(xu)電(dian)(dian)(dian)池(chi)的(de)額定(ding)容(rong)量C，單位安(an)時(shi)(Ah)，它是放(fang)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)安(an)(A)和(he)放(fang)電(dian)(dian)(dian)時(shi)間(jian)小時(shi)(h)的(de)乘積。由于(yu)對同(tong)(tong)一(yi)個電(dian)(dian)(dian)池(chi)采(cai)用不同(tong)(tong)的(de)放(fang)電(dian)(dian)(dian)參(can)數所得出的(de)Ah是不同(tong)(tong)的(de)，為了(le)便(bian)于(yu)對電(dian)(dian)(dian)池(chi)容(rong)量進行描(miao)述、測量和(he)比較，必須(xu)事(shi)先設定(ding)統一(yi)的(de)條件(jian)。實踐中，電(dian)(dian)(dian)池(chi)容(rong)量被定(ding)義(yi)為：用設定(ding)的(de)電(dian)(dian)(dian)流(liu)把電(dian)(dian)(dian)池(chi)放(fang)電(dian)(dian)(dian)至設定(ding)的(de)電(dian)(dian)(dian)壓所給出的(de)電(dian)(dian)(dian)量。也可以說(shuo)電(dian)(dian)(dian)池(chi)容(rong)量是：用設定(ding)的(de)電(dian)(dian)(dian)流(liu)把電(dian)(dian)(dian)池(chi)放(fang)電(dian)(dian)(dian)至設定(ding)的(de)電(dian)(dian)(dian)壓所經歷的(de)時(shi)間(jian)和(he)這個電(dian)(dian)(dian)流(liu)的(de)乘積。

為(wei)了設(she)定(ding)(ding)統一的(de)(de)條件，首先根(gen)據電(dian)(dian)(dian)(dian)(dian)(dian)池構造(zao)特征和(he)用(yong)途的(de)(de)差異，設(she)定(ding)(ding)了若(ruo)干個(ge)放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)時(shi)(shi)(shi)率(lv)，最常見(jian)的(de)(de)有20小(xiao)(xiao)時(shi)(shi)(shi)、10小(xiao)(xiao)時(shi)(shi)(shi)時(shi)(shi)(shi)率(lv)、電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)車專用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)池為(wei)2小(xiao)(xiao)時(shi)(shi)(shi)率(lv)，寫做(zuo)C20、C10和(he)C2，其中C代表電(dian)(dian)(dian)(dian)(dian)(dian)池容量(liang)，后面跟隨(sui)的(de)(de)數(shu)字表示該(gai)類電(dian)(dian)(dian)(dian)(dian)(dian)池以某種強度的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)到(dao)設(she)定(ding)(ding)電(dian)(dian)(dian)(dian)(dian)(dian)壓的(de)(de)小(xiao)(xiao)時(shi)(shi)(shi)數(shu)。于(yu)是(shi)，用(yong)容量(liang)除小(xiao)(xiao)時(shi)(shi)(shi)數(shu)即得出額定(ding)(ding)放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)。也就是(shi)說，容量(liang)相同而(er)放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)時(shi)(shi)(shi)率(lv)不同的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)池，它們的(de)(de)標稱(cheng)放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)卻相差甚遠。比如(ru)，一個(ge)電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)自行車用(yong)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)池容量(liang)10Ah、放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)時(shi)(shi)(shi)率(lv)為(wei)2小(xiao)(xiao)時(shi)(shi)(shi)，寫做(zuo)10Ah2，它的(de)(de)額定(ding)(ding)放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)為(wei)10(Ah)/2(h)=5A;而(er)一個(ge)汽(qi)車啟動(dong)用(yong)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)池容量(liang)為(wei)54Ah、放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)時(shi)(shi)(shi)率(lv)為(wei)20小(xiao)(xiao)時(shi)(shi)(shi)，寫做(zuo)54Ah20，它的(de)(de)額定(ding)(ding)放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)僅(jin)為(wei)54(Ah)/20(h)=2.7A!換一個(ge)角度講，這兩種電(dian)(dian)(dian)(dian)(dian)(dian)池如(ru)果分別用(yong)5A和(he)2.7A的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)，則(ze)應該(gai)分別能持續2小(xiao)(xiao)時(shi)(shi)(shi)和(he)20小(xiao)(xiao)時(shi)(shi)(shi)才下(xia)降(jiang)到(dao)設(she)定(ding)(ding)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓。

上述所謂設(she)定的電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)是指(zhi)終止(zhi)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(單(dan)位(wei)V)。終止(zhi)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)可以(yi)(yi)簡單(dan)的理解為：放(fang)(fang)電(dian)(dian)(dian)(dian)時電(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)下降到(dao)不至(zhi)于造成損壞(huai)的最低(di)(di)限度值(zhi)(zhi)。終止(zhi)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)(zhi)不是固定不變的，它隨著放(fang)(fang)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)(liu)的增大而(er)降低(di)(di)，同一個(ge)蓄(xu)電(dian)(dian)(dian)(dian)池(chi)放(fang)(fang)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)(liu)越大，終止(zhi)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)可以(yi)(yi)越低(di)(di)，反之應(ying)該越高。也(ye)就是說，大電(dian)(dian)(dian)(dian)流(liu)(liu)放(fang)(fang)電(dian)(dian)(dian)(dian)時容(rong)許蓄(xu)電(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)下降到(dao)較(jiao)低(di)(di)的值(zhi)(zhi)，而(er)小電(dian)(dian)(dian)(dian)流(liu)(liu)放(fang)(fang)電(dian)(dian)(dian)(dian)就不行，否(fou)則會造成損害。

電(dian)(dian)(dian)(dian)池(chi)(chi)在(zai)(zai)(zai)工作(zuo)中的(de)電(dian)(dian)(dian)(dian)流(liu)強度還常(chang)常(chang)使用(yong)倍(bei)(bei)(bei)(bei)率(lv)(lv)(lv)來表(biao)示，寫做NCh。N是一(yi)個倍(bei)(bei)(bei)(bei)數(shu)(shu)，C代表(biao)容(rong)量(liang)的(de)安時(shi)數(shu)(shu)，h表(biao)示放(fang)電(dian)(dian)(dian)(dian)時(shi)率(lv)(lv)(lv)規定的(de)小(xiao)(xiao)時(shi)數(shu)(shu)。在(zai)(zai)(zai)這(zhe)里h的(de)數(shu)(shu)值僅作(zuo)為提(ti)示相(xiang)關(guan)電(dian)(dian)(dian)(dian)池(chi)(chi)是屬(shu)于(yu)那種放(fang)電(dian)(dian)(dian)(dian)時(shi)率(lv)(lv)(lv)，所以在(zai)(zai)(zai)具(ju)體(ti)描述某個時(shi)率(lv)(lv)(lv)的(de)電(dian)(dian)(dian)(dian)池(chi)(chi)時(shi)，倍(bei)(bei)(bei)(bei)率(lv)(lv)(lv)常(chang)常(chang)寫成NC的(de)形(xing)式而不寫下標。倍(bei)(bei)(bei)(bei)數(shu)(shu)N乘以容(rong)量(liang)C就等于(yu)電(dian)(dian)(dian)(dian)流(liu)A。比(bi)如20Ah電(dian)(dian)(dian)(dian)池(chi)(chi)采(cai)用(yong)0.5C倍(bei)(bei)(bei)(bei)率(lv)(lv)(lv)放(fang)電(dian)(dian)(dian)(dian)，0.5×20=10A。換(huan)一(yi)個角度舉例(li)：某汽車啟動蓄電(dian)(dian)(dian)(dian)池(chi)(chi)容(rong)量(liang)54Ah，測得輸出電(dian)(dian)(dian)(dian)流(liu)為5.4A，那么它此時(shi)的(de)放(fang)電(dian)(dian)(dian)(dian)倍(bei)(bei)(bei)(bei)率(lv)(lv)(lv)N為5.4/54=0.1C。下圖是某20小(xiao)(xiao)時(shi)率(lv)(lv)(lv)的(de)電(dian)(dian)(dian)(dian)池(chi)(chi)產(chan)品在(zai)(zai)(zai)不同(tong)放(fang)電(dian)(dian)(dian)(dian)倍(bei)(bei)(bei)(bei)率(lv)(lv)(lv)下的(de)終止電(dian)(dian)(dian)(dian)壓和(he)放(fang)電(dian)(dian)(dian)(dian)時(shi)間的(de)關(guan)系(xi)，這(zhe)些數(shu)(shu)值對(dui)通常(chang)的(de)鉛酸蓄電(dian)(dian)(dian)(dian)池(chi)(chi)具(ju)有代表(biao)性。

同一個電(dian)池在不同的(de)(de)(de)放(fang)(fang)電(dian)電(dian)流下所得(de)出的(de)(de)(de)Ah(電(dian)流和(he)時(shi)(shi)間的(de)(de)(de)乘(cheng)積)數是不同的(de)(de)(de)。假(jia)設(she)電(dian)池的(de)(de)(de)容(rong)量為10Ah，以(yi)(yi)0.6C倍率也(ye)就是6A放(fang)(fang)電(dian)時(shi)(shi)間只能(neng)持續1小時(shi)(shi)，能(neng)夠(gou)放(fang)(fang)出的(de)(de)(de)電(dian)量僅為6A×1h=6Ah。而(er)以(yi)(yi)0.05C也(ye)就是0.5A放(fang)(fang)電(dian)時(shi)(shi)間可以(yi)(yi)持續20小時(shi)(shi)，放(fang)(fang)出電(dian)量0.5A×20h=10Ah。盡管前者(zhe)的(de)(de)(de)終(zhong)止(zhi)電(dian)壓(ya)比后(hou)者(zhe)低得(de)多，但能(neng)夠(gou)放(fang)(fang)出的(de)(de)(de)電(dian)量要(yao)遠小于后(hou)者(zhe)。