鋰電池組均衡處理的意義
鋰電池電(dian)(dian)(dian)包通(tong)(tong)常(chang)由一個(ge)或(huo)幾個(ge)電(dian)(dian)(dian)池(chi)組(zu)并聯,每個(ge)電(dian)(dian)(dian)池(chi)組(zu)由3到(dao)4個(ge)電(dian)(dian)(dian)池(chi)串聯構成(cheng)。這(zhe)種組(zu)合方式能同(tong)時滿足筆記(ji)本電(dian)(dian)(dian)腦、醫療設備、測試儀器及(ji)工業應(ying)用所需(xu)的(de)(de)(de)電(dian)(dian)(dian)壓和(he)功(gong)率要求。然而,這(zhe)種應(ying)用普遍的(de)(de)(de)配(pei)置(zhi)通(tong)(tong)常(chang)并不能發揮其最大功(gong)效,因為如(ru)果某個(ge)串聯電(dian)(dian)(dian)池(chi)的(de)(de)(de)容量(liang)與其它電(dian)(dian)(dian)池(chi)不匹配(pei)將會(hui)降低整個(ge)電(dian)(dian)(dian)池(chi)包的(de)(de)(de)容量(liang)。
電池容(rong)量的不匹配包括充電狀態(SOC)失配和容(rong)量/能量(C/E)失配。在兩(liang)種情況下,電池包的總容(rong)量都只能達(da)到最弱電池的容(rong)量。
在大多(duo)數情況下,引起電(dian)(dian)池(chi)失配的原因是(shi)工(gong)藝(yi)(yi)控制和檢測手段的不完(wan)善(shan),而不是(shi)鋰離(li)子本身的化學屬(shu)性變化。棱(leng)柱形鋰電(dian)(dian)池(chi)(Lilon prismatic cell)在生產時(shi)需要更強的機械壓力,電(dian)(dian)池(chi)之間(jian)(jian)更容易產生差(cha)異(yi)。此外,鋰離(li)子聚(ju)合物電(dian)(dian)池(chi)也會(hui)因為采(cai)用新的工(gong)藝(yi)(yi)而出現電(dian)(dian)池(chi)之間(jian)(jian)的差(cha)異(yi)。
采用(yong)電(dian)池(chi)均(jun)衡(heng)處理技術可(ke)解決SOC和C/E失配問題(ti)(ti),從(cong)而(er)改進(jin)(jin)串聯鋰(li)電(dian)池(chi)包的性能(neng)。通過(guo)(guo)在初始調節(jie)過(guo)(guo)程(cheng)(cheng)中對電(dian)池(chi)進(jin)(jin)行(xing)均(jun)衡(heng)處理可(ke)以矯(jiao)正(zheng)電(dian)池(chi)失配問題(ti)(ti),此后只需在充電(dian)過(guo)(guo)程(cheng)(cheng)中進(jin)(jin)行(xing)均(jun)衡(heng)即可(ke),而(er)CE失配則(ze)必(bi)須在充、放電(dian)過(guo)(guo)程(cheng)(cheng)都進(jin)(jin)行(xing)均(jun)衡(heng)。盡管(guan)對于(yu)某個電(dian)池(chi)廠商而(er)言其產品缺(que)陷(xian)率(lv)可(ke)能(neng)很低,但為了避(bi)免出(chu)現電(dian)池(chi)使用(yong)壽命過(guo)(guo)短的問題(ti)(ti),我們仍然(ran)有(you)必(bi)要提供進(jin)(jin)一步的質量保證。





