聚合物鋰電池充電方法
目前(qian)鋰充(chong)(chong)電(dian)(dian)主要是限(xian)壓(ya)(ya)限(xian)流法,初期恒(heng)流(CC)充(chong)(chong)電(dian)(dian),電(dian)(dian)池接受能力最強,隨著(zhu)充(chong)(chong)電(dian)(dian)過程(cheng)不(bu)斷進行,極化作用加強,溫升(sheng)加劇,電(dian)(dian)壓(ya)(ya)上(shang)升(sheng),當荷電(dian)(dian)達到(dao)約70~80%時(shi)(shi),電(dian)(dian)壓(ya)(ya)達到(dao)最高充(chong)(chong)電(dian)(dian)限(xian)制(zhi)電(dian)(dian)壓(ya)(ya),轉入恒(heng)壓(ya)(ya)(CV)充(chong)(chong)電(dian)(dian)階(jie)段。在(zai)恒(heng)壓(ya)(ya)階(jie)段,有稱(cheng)涓流充(chong)(chong)電(dian)(dian),大約花(hua)費30%的(de)時(shi)(shi)間(jian)充(chong)(chong)入10%的(de)電(dian)(dian)量,電(dian)(dian)流強度(du)減小(xiao),溫升(sheng)不(bu)再增加。
這種過(guo)(guo)(guo)程(cheng)考(kao)慮電(dian)(dian)池(chi)(chi)組(zu)總電(dian)(dian)壓(ya)或平(ping)均電(dian)(dian)壓(ya)控(kong)制,其實總有單體電(dian)(dian)壓(ya)較高者,相(xiang)對(dui)組(zu)內(nei)其它電(dian)(dian)池(chi)(chi)已經進入過(guo)(guo)(guo)充電(dian)(dian)階(jie)段(duan)。同理,在(zai)放(fang)(fang)電(dian)(dian)時,在(zai)組(zu)內(nei)就有過(guo)(guo)(guo)放(fang)(fang)電(dian)(dian)電(dian)(dian)池(chi)(chi),過(guo)(guo)(guo)充過(guo)(guo)(guo)放(fang)(fang)對(dui)電(dian)(dian)池(chi)(chi)的(de)損害(hai)都(dou)是致(zhi)命(ming)的(de),不同之處僅在(zai)于(yu)過(guo)(guo)(guo)充產生大(da)量氣(qi)體、易自燃和(he)爆炸、表象劇烈(lie);過(guo)(guo)(guo)放(fang)(fang)外觀(guan)變化和(he)緩、但(dan)失效速度卻(que)極(ji)快,在(zai)正(zheng)常使(shi)用(yong)中都(dou)應嚴(yan)格避免(mian)出現(xian)。
對此,就有一(yi)種稱為并聯控制、均衡(heng)(heng)管(guan)(guan)理(li)的新的鋰電充電方(fang)法(fa),能夠(gou)對每一(yi)節電蕊單(dan)獨進(jin)行充放(fang)電管(guan)(guan)理(li),均衡(heng)(heng)控制,這種動態(tai)均衡(heng)(heng)集中了放(fang)電均衡(heng)(heng)與充電均衡(heng)(heng)兩種均衡(heng)(heng)的優點,盡管(guan)(guan)單(dan)體電蕊之間初(chu)始容量、電壓、內阻等(deng)有差(cha)異,在工(gong)作(zuo)中卻能保證相對的充放(fang)電強度和深(shen)度的一(yi)致性(xing),漸進(jin)達(da)到共同的壽命終點。這種方(fang)法(fa)對大(da)電流放(fang)電特(te)別適(shi)用。
因此,在(zai)給(gei)鋰電(dian)(dian)(dian)(dian)池(chi)(chi)充電(dian)(dian)(dian)(dian)時,一定要使(shi)(shi)用(yong)專用(yong)的(de)鋰電(dian)(dian)(dian)(dian)充電(dian)(dian)(dian)(dian)器(qi),特別(bie)是(shi)要注(zhu)意與所使(shi)(shi)用(yong)的(de)電(dian)(dian)(dian)(dian)蕊(rui)的(de)參數(shu)要配套,要一致(zhi),當鋰電(dian)(dian)(dian)(dian)池(chi)(chi)組合使(shi)(shi)用(yong)時,一定要給(gei)電(dian)(dian)(dian)(dian)池(chi)(chi)組加(jia)PCB保(bao)護(hu)板(ban),才可(ke)能(neng)避免電(dian)(dian)(dian)(dian)芯豉包、漏液、甚(shen)至起(qi)火、爆(bao)炸,盡可(ke)能(neng)的(de)延長電(dian)(dian)(dian)(dian)池(chi)(chi)的(de)使(shi)(shi)用(yong)壽命(ming),不過(guo)充不過(guo)放,增加(jia)電(dian)(dian)(dian)(dian)池(chi)(chi)的(de)循(xun)環(huan)使(shi)(shi)用(yong)次數(shu)。
鋰聚合物電池保養方法
作為鋰離(li)子電(dian)(dian)池之后進(jin)行革新得到的(de)新電(dian)(dian)池產品,鋰聚合物電(dian)(dian)池在使(shi)用中有一(yi)些需要注意的(de)地(di)方。
首先,是鋰(li)(li)聚(ju)合(he)物(wu)電(dian)池(chi)(chi)(chi)的(de)(de)特(te)點(dian)。相比較(jiao)鋰(li)(li)離子電(dian)池(chi)(chi)(chi),鋰(li)(li)聚(ju)合(he)物(wu)電(dian)池(chi)(chi)(chi)改善了電(dian)池(chi)(chi)(chi)漏(lou)液(ye)的(de)(de)問題,但也(ye)并沒有徹底(di)的(de)(de)改善。此外鋰(li)(li)聚(ju)合(he)物(wu)電(dian)池(chi)(chi)(chi)能夠(gou)制(zhi)作成(cheng)超薄型電(dian)池(chi)(chi)(chi),0.5mm的(de)(de)厚度(du)就可以達到3.6V400毫安(an)時的(de)(de)容量(liang),而且在(zai)放電(dian)量(liang)上(shang),鋰(li)(li)聚(ju)合(he)物(wu)電(dian)池(chi)(chi)(chi)也(ye)比傳(chuan)統鋰(li)(li)離子電(dian)池(chi)(chi)(chi)高出10%。
而在日常使用中,同樣作為鋰離子電池的一種,鋰聚合物電池也常害怕電池內部的短、外部短、過充這些情況的。原因是因為鋰的化學性質非常的活躍,當電池放電充電的(de)時(shi)候,電池的(de)內(nei)部就會不(bu)斷的(de)升溫(wen),當溫(wen)度(du)過高的(de)時(shi)候,就有(you)可能產(chan)生爆炸。
因此,當使(shi)用電池(chi)的(de)(de)(de)時候,盡(jin)(jin)量注(zhu)意不(bu)(bu)要過充(chong)過放,也就(jiu)是(shi)平穩(wen)有計(ji)劃(hua)的(de)(de)(de)使(shi)用電池(chi),不(bu)(bu)要輕易(yi)讓電池(chi)電量耗盡(jin)(jin),也不(bu)(bu)要充(chong)電的(de)(de)(de)時候連續充(chong)太(tai)長的(de)(de)(de)時間(一般來說8個小時以(yi)內是(shi)最合適的(de)(de)(de))。