1.有必要帶均衡的情況：在電池組生產完成存放時間比較長的情況下，由于保護板各路靜態功耗的不同和各個電芯的自放電率不同，形成整組電池各串電池的電壓不一致，從而有明顯的壓差，但保證容量一致的情況下，均衡對電池組有均衡電壓的功能，從而能達到電池組容量的滿充、滿放的功效，使電池組發揮大的功效。

2.均(jun)(jun)(jun)衡(heng)不(bu)起用(yong)途(tu)的(de)(de)情況(kuang)：好(hao)多(duo)人認為電(dian)(dian)(dian)池(chi)組(zu)(zu)(zu)在使用(yong)到中、后(hou)(hou)期時均(jun)(jun)(jun)衡(heng)有起用(yong)途(tu)，其(qi)實(shi)電(dian)(dian)(dian)池(chi)組(zu)(zu)(zu)在使用(yong)到中、后(hou)(hou)期時，由于各個電(dian)(dian)(dian)芯(xin)(xin)的(de)(de)容(rong)(rong)量(liang)(liang)(liang)(liang)損耗不(bu)同，引起一(yi)個容(rong)(rong)量(liang)(liang)(liang)(liang)差，靠保(bao)護板均(jun)(jun)(jun)衡(heng)是(shi)(shi)無法來(lai)彌補電(dian)(dian)(dian)芯(xin)(xin)容(rong)(rong)量(liang)(liang)(liang)(liang)的(de)(de)，表面上電(dian)(dian)(dian)池(chi)組(zu)(zu)(zu)各串的(de)(de)電(dian)(dian)(dian)壓是(shi)(shi)一(yi)致(zhi)的(de)(de)，但由于容(rong)(rong)量(liang)(liang)(liang)(liang)的(de)(de)不(bu)一(yi)致(zhi)，在充(chong)(chong)放(fang)電(dian)(dian)(dian)是(shi)(shi)往往是(shi)(shi)容(rong)(rong)量(liang)(liang)(liang)(liang)低的(de)(de)單串電(dian)(dian)(dian)芯(xin)(xin)先過放(fang)保(bao)護和過充(chong)(chong)保(bao)護，因此電(dian)(dian)(dian)池(chi)組(zu)(zu)(zu)的(de)(de)容(rong)(rong)量(liang)(liang)(liang)(liang)也就是(shi)(shi)以容(rong)(rong)量(liang)(liang)(liang)(liang)低的(de)(de)單串電(dian)(dian)(dian)芯(xin)(xin)來(lai)體現。因此我們該明白(bai)保(bao)護板均(jun)(jun)(jun)衡(heng)的(de)(de)是(shi)(shi)電(dian)(dian)(dian)壓，而(er)容(rong)(rong)量(liang)(liang)(liang)(liang)是(shi)(shi)無法來(lai)補充(chong)(chong)的(de)(de)。

3.均(jun)(jun)(jun)衡(heng)用途存在的矛盾：均(jun)(jun)(jun)衡(heng)一般有(you)兩個要素：A：均(jun)(jun)(jun)衡(heng)開(kai)啟電(dian)壓設(she)置(zhi)：均(jun)(jun)(jun)衡(heng)電(dian)壓設(she)置(zhi)低了(le)，保護(hu)(hu)板(ban)(ban)開(kai)啟均(jun)(jun)(jun)衡(heng)時(shi)間(jian)就長了(le)，均(jun)(jun)(jun)衡(heng)效(xiao)果(guo)比較明(ming)顯，但是(shi)保護(hu)(hu)板(ban)(ban)在均(jun)(jun)(jun)衡(heng)的同時(shi)會出現熱量，均(jun)(jun)(jun)衡(heng)時(shi)間(jian)越(yue)(yue)長，出現熱量越(yue)(yue)多，直(zhi)接影響保護(hu)(hu)板(ban)(ban)性能或保護(hu)(hu)板(ban)(ban)損(sun)(sun)壞(huai)；均(jun)(jun)(jun)衡(heng)電(dian)壓設(she)置(zhi)高了(le)，均(jun)(jun)(jun)衡(heng)開(kai)啟時(shi)間(jian)短了(le)，均(jun)(jun)(jun)衡(heng)效(xiao)果(guo)不明(ming)顯。B:均(jun)(jun)(jun)衡(heng)電(dian)流設(she)置(zhi)：均(jun)(jun)(jun)衡(heng)電(dian)流設(she)置(zhi)大了(le)，均(jun)(jun)(jun)衡(heng)效(xiao)果(guo)明(ming)顯，但是(shi)均(jun)(jun)(jun)衡(heng)是(shi)出現熱量厲(li)害(hai)，會損(sun)(sun)壞(huai)保護(hu)(hu)板(ban)(ban)；均(jun)(jun)(jun)衡(heng)電(dian)流設(she)置(zhi)小了(le)，均(jun)(jun)(jun)衡(heng)效(xiao)果(guo)不明(ming)顯，均(jun)(jun)(jun)衡(heng)時(shi)間(jian)也短。

目前鋰電池組均(jun)(jun)衡(heng)(heng)方(fang)法最(zui)常(chang)見的兩種方(fang)式，分別是耗能式均(jun)(jun)衡(heng)(heng)和轉能式均(jun)(jun)衡(heng)(heng)。

鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)組(zu)耗能式(shi)(shi)均衡顧名思(si)義(yi)就(jiu)(jiu)是(shi)把鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)組(zu)中某節電(dian)(dian)(dian)(dian)(dian)壓高(gao)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)池(chi)用(yong)電(dian)(dian)(dian)(dian)(dian)阻(zu)把多余電(dian)(dian)(dian)(dian)(dian)量(liang)耗盡。這種方(fang)式(shi)(shi)的(de)(de)(de)(de)(de)均衡的(de)(de)(de)(de)(de)成本較(jiao)(jiao)低，設計也(ye)是(shi)相對簡單(dan)，在(zai)鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)組(zu)中單(dan)節鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)之(zhi)間(jian)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓不(bu)能達到一(yi)致時能夠起到一(yi)定的(de)(de)(de)(de)(de)作用(yong)，但是(shi)相對的(de)(de)(de)(de)(de)，這種方(fang)式(shi)(shi)的(de)(de)(de)(de)(de)均衡也(ye)較(jiao)(jiao)為容(rong)(rong)易出現故障，而且均衡時鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)所(suo)發出的(de)(de)(de)(de)(de)溫度(du)較(jiao)(jiao)高(gao)。而且有一(yi)點，因為鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)組(zu)中各個單(dan)節電(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)都不(bu)盡相同，所(suo)以每次充電(dian)(dian)(dian)(dian)(dian)，容(rong)(rong)量(liang)較(jiao)(jiao)小(xiao)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)(dian)量(liang)會很(hen)快的(de)(de)(de)(de)(de)達到飽和，由于容(rong)(rong)量(liang)較(jiao)(jiao)大的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)池(chi)還在(zai)充電(dian)(dian)(dian)(dian)(dian)中，容(rong)(rong)量(liang)較(jiao)(jiao)小(xiao)的(de)(de)(de)(de)(de)鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)就(jiu)(jiu)會均衡，以類似于放電(dian)(dian)(dian)(dian)(dian)額(e)形(xing)式(shi)(shi)去耗除電(dian)(dian)(dian)(dian)(dian)量(liang)一(yi)直循環直到大容(rong)(rong)量(liang)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)(dian)量(liang)飽和為止(zhi)，所(suo)以大家可以想象時間(jian)久了，容(rong)(rong)量(liang)較(jiao)(jiao)小(xiao)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)池(chi)整體性(xing)能就(jiu)(jiu)會大大額(e)下降，這個就(jiu)(jiu)跟(gen)我們(men)手機(ji)電(dian)(dian)(dian)(dian)(dian)池(chi)長時間(jian)用(yong)性(xing)能下降是(shi)一(yi)個道理。所(suo)以鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)組(zu)耗能式(shi)(shi)均衡存(cun)在(zai)著很(hen)大的(de)(de)(de)(de)(de)弊端。

鋰(li)電(dian)(dian)(dian)池(chi)(chi)(chi)組能(neng)量(liang)轉(zhuan)移(yi)(yi)式均(jun)(jun)衡(heng)也很好(hao)理(li)解，就(jiu)(jiu)是(shi)(shi)讓電(dian)(dian)(dian)池(chi)(chi)(chi)組中能(neng)量(liang)較高(gao)額(e)鋰(li)電(dian)(dian)(dian)池(chi)(chi)(chi)轉(zhuan)移(yi)(yi)到(dao)能(neng)量(liang)較低的鋰(li)電(dian)(dian)(dian)池(chi)(chi)(chi)上，這(zhe)種方(fang)式的均(jun)(jun)衡(heng)乍一(yi)聽確實很實用(yong)，但是(shi)(shi)在實際情況(kuang)下(xia)，目前的能(neng)量(liang)轉(zhuan)移(yi)(yi)式均(jun)(jun)衡(heng)并(bing)不是(shi)(shi)很完善，因(yin)為這(zhe)種方(fang)式的均(jun)(jun)衡(heng)并(bing)不能(neng)通過(guo)檢測(ce)單(dan)節電(dian)(dian)(dian)池(chi)(chi)(chi)的電(dian)(dian)(dian)壓來(lai)進(jin)行能(neng)量(liang)轉(zhuan)移(yi)(yi)的，而是(shi)(shi)通過(guo)電(dian)(dian)(dian)池(chi)(chi)(chi)容量(liang)來(lai)進(jin)行能(neng)量(liang)轉(zhuan)移(yi)(yi)的，當高(gao)能(neng)量(liang)的電(dian)(dian)(dian)池(chi)(chi)(chi)向低能(neng)量(liang)的電(dian)(dian)(dian)池(chi)(chi)(chi)轉(zhuan)移(yi)(yi)能(neng)量(liang)的時(shi)候，因(yin)為均(jun)(jun)衡(heng)電(dian)(dian)(dian)流以及充電(dian)(dian)(dian)電(dian)(dian)(dian)流時(shi)固定的，不可控的，所以在轉(zhuan)移(yi)(yi)的時(shi)候，低容量(liang)的電(dian)(dian)(dian)池(chi)(chi)(chi)可能(neng)會(hui)達到(dao)過(guo)充值，鋰(li)電(dian)(dian)(dian)池(chi)(chi)(chi)保護板就(jiu)(jiu)會(hui)工作從而停止充電(dian)(dian)(dian)，那(nei)么(me)整個循環就(jiu)(jiu)會(hui)因(yin)此終止。