就目前的電池管理技術,能夠解決電池組一致性問題的技術只有電池均衡技術。而要實現電池容量的充分利用,則必須要求電池均(jun)衡(heng)(heng)(heng)器同(tong)時支持(chi)放(fang)電均(jun)衡(heng)(heng)(heng)、充(chong)電均(jun)衡(heng)(heng)(heng)和靜態均(jun)衡(heng)(heng)(heng),此外,由于(yu)不同(tong)容(rong)量電池的存在,充(chong)放(fang)電末(mo)期存在較高(gao)的電壓差,因此,電池均(jun)衡(heng)(heng)(heng)器還必須(xu)具(ju)有寬(kuan)幅的均(jun)衡(heng)(heng)(heng)電流(liu)和高(gao)效的電能轉(zhuan)換效率,既(ji)能實現高(gao)效均(jun)衡(heng)(heng)(heng)又能減(jian)少在充(chong)分利用容(rong)量期間的損失(shi)。

好消息是,具(ju)有這種技(ji)術(shu)要求(qiu)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)池(chi)均(jun)衡(heng)技(ji)術(shu)已(yi)經(jing)被(bei)科研(yan)工作(zuo)者(zhe)研(yan)發出來,經(jing)過(guo)不間斷的(de)(de)(de)(de)持(chi)續改進,性能(neng)越(yue)來越(yue)好,很小的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)壓差就可(ke)(ke)以獲(huo)得非(fei)常大(da)(da)的(de)(de)(de)(de)均(jun)衡(heng)電(dian)(dian)(dian)(dian)流(liu),5A以內均(jun)衡(heng)電(dian)(dian)(dian)(dian)流(liu)的(de)(de)(de)(de)設(she)計(ji),可(ke)(ke)以實(shi)現1A/13mV;10～15A均(jun)衡(heng)電(dian)(dian)(dian)(dian)流(liu)的(de)(de)(de)(de)設(she)計(ji),可(ke)(ke)以實(shi)現1A/10mV,從而實(shi)現高速均(jun)衡(heng),該技(ji)術(shu)的(de)(de)(de)(de)鮮(xian)明優(you)勢是同(tong)時支持(chi)高速放電(dian)(dian)(dian)(dian)均(jun)衡(heng)和(he)高速充電(dian)(dian)(dian)(dian)均(jun)衡(heng),這是很多電(dian)(dian)(dian)(dian)池(chi)均(jun)衡(heng)器技(ji)術(shu)不具(ju)備的(de)(de)(de)(de)。在(zai)高速放電(dian)(dian)(dian)(dian)均(jun)衡(heng)期間,大(da)(da)容量電(dian)(dian)(dian)(dian)池(chi)多釋放的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)池(chi)容量不經(jing)過(guo)小容量電(dian)(dian)(dian)(dian)池(chi),而是直接進入放電(dian)(dian)(dian)(dian)通道(dao)對(dui)負(fu)載供電(dian)(dian)(dian)(dian),小容量電(dian)(dian)(dian)(dian)池(chi)由于實(shi)際放電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)降(jiang)低,因內阻原因引起的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)池(chi)溫升大(da)(da)幅度(du)降(jiang)低,也(ye)降(jiang)低了熱失控的(de)(de)(de)(de)風險。

高(gao)速放(fang)電(dian)(dian)均衡最(zui)重(zhong)要的(de)(de)意義在于能發揮(hui)電(dian)(dian)池容量(liang)(liang)的(de)(de)最(zui)大(da)功效,讓(rang)應該做功的(de)(de)容量(liang)(liang)全部利用起來(lai),例(li)如(ru)99串20Ah容量(liang)(liang),而不是讓(rang)其閑(xian)置不用。真正(zheng)意義上的(de)(de)高(gao)速放(fang)電(dian)(dian)均衡包含多方面的(de)(de)含義:實時(shi)均衡、支持大(da)電(dian)(dian)流均衡、電(dian)(dian)能轉(zhuan)換效率(lv)要高(gao)。

仍以99串20Ah電(dian)池組(zu)為例,假(jia)設電(dian)池組(zu)的(de)放(fang)電(dian)電(dian)流為0.2C,即(ji)20A,那么,本(ben)文(wen)均衡(heng)(heng)器(qi)的(de)最大(da)(da)均衡(heng)(heng)電(dian)流只要達到4.5～5.0A即(ji)可滿足(zu)該(gai)電(dian)池組(zu)安(an)全放(fang)電(dian)、并且(qie)所有(you)20Ah的(de)電(dian)量都可以正常釋放(fang)的(de)要。同樣,假(jia)如電(dian)池組(zu)的(de)放(fang)電(dian)電(dian)流提高(gao)到0.4C,即(ji)40A,則(ze)最大(da)(da)均衡(heng)(heng)電(dian)流要9～9.5A,普通電(dian)池均衡(heng)(heng)器(qi)是無法滿足(zu)要求的(de)，而本(ben)文(wen)采用的(de)同步整流技術的(de)實時(shi)高(gao)功(gong)率、高(gao)效率轉移式(shi)電(dian)池均衡(heng)(heng)器(qi)則(ze)可以輕(qing)松(song)應對。

均衡電流越(yue)大(da),對小容量電池(chi)(chi)(chi)的過充、過放電保(bao)護(hu)能力越(yue)強(qiang),電池(chi)(chi)(chi)組的運行越(yue)安全,允許電池(chi)(chi)(chi)間的差異(yi)越(yue)大(da)。