本發明涉及電(dian)池技術領域,具體是一(yi)種光伏(fu)鋰離子電(dian)池電(dian)極的水性組方及生產(chan)工藝。
背景技術:
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化(hua)(hua)學(xue)(xue)(xue)能(neng)轉(zhuan)換(huan)成電(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)的(de)裝置叫化(hua)(hua)學(xue)(xue)(xue)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi),一(yi)般簡稱(cheng)為電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)后(hou),能(neng)夠用充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)方式使(shi)(shi)內部(bu)活性物質(zhi)再生(sheng)——把(ba)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)儲存為化(hua)(hua)學(xue)(xue)(xue)能(neng);需要放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)時(shi)再次把(ba)化(hua)(hua)學(xue)(xue)(xue)能(neng)轉(zhuan)換(huan)為電(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)。在(zai)(zai)冬(dong)天,當鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)在(zai)(zai)低(di)溫情況下(xia)(xia)運行時(shi),各種活性物質(zhi)的(de)活度降低(di),則充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)明顯下(xia)(xia)降。低(di)溫條件下(xia)(xia)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian),鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)接受能(neng)力差(cha),充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)不足,需提高充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓和延長(chang)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)時(shi)間(jian)。為延長(chang)鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)使(shi)(shi)用壽命,現在(zai)(zai)還沒(mei)有通過在(zai)(zai)技術上改進(jin)來實現的(de)方式,大都是(shi)通過鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)在(zai)(zai)低(di)溫下(xia)(xia)使(shi)(shi)用時(shi)應(ying)采取防凍保(bao)溫措施(shi),充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)時(shi)鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)應(ying)放在(zai)(zai)溫暖環(huan)境中進(jin)行,不僅麻煩(fan),而且效(xiao)果差(cha)。
技術實現要素:
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本發明所(suo)要(yao)解(jie)決的技術(shu)問(wen)題(ti)在于提供(gong)一種低溫下的充電性能優(you)異,使用壽命(ming)長的清掃車的耐低溫光(guang)伏鋰電池(chi)。
為了(le)實現本發(fa)明所要(yao)達(da)到的目(mu)的,采用(yong)以下的技術方案:
一種(zhong)光伏鋰離子電池電極(ji)的水性組方,其特征在(zai)于:由以下重量(liang)份組分制成,
所述的(de)耐低溫劑按重量份包括以下組分,氯化鉀0.1~0.5份、甲基(ji)磺酸錫0.1~0.5和鎢酸亞鈷0.01~0.08份。
一種光伏鋰(li)離子(zi)電池電極(ji)的水性(xing)組方的生(sheng)產(chan)工(gong)藝(yi),其特征在于:
1).取40-60%去離子水加(jia)0.5-2%食用速(su)溶(rong)性(xing)CMC制膠,加(jia)入到混合攪拌機桶內攪拌0.5~2小時制的增稠劑(ji)備(bei)用;
2).分次(ci)(ci)投(tou)料(liao)浸(jin)泡(pao)(pao)活(huo)性物(wu)質:首次(ci)(ci)將稱取活(huo)性物(wu)總量的(de)(de)50%投(tou)入(ru)容器中,加入(ru)去離子(zi)水(shui)總量的(de)(de)25%,待水(shui)份吸收后再進行二次(ci)(ci)投(tou)料(liao),將剩余的(de)(de)活(huo)性物(wu)質50%以及全部耐低溫劑(ji)投(tou)入(ru)容器中,再加入(ru)去離子(zi)水(shui)總量的(de)(de)25%,充(chong)分浸(jin)泡(pao)(pao)2~4小時;
3).將(jiang)已制好的膠加入到浸泡好的活性物質,進行攪拌(ban)1~2小(xiao)時;
4).加入增(zeng)稠(chou)劑混合,進行攪(jiao)拌0.5~1小時;
5).測粘度,粘度控制需達到工藝要求;
6).將(jiang)漿料用100~120目的篩(shai)網(wang)過濾(lv);
7).將漿(jiang)料均(jun)勻涂在金(jin)屬箔(bo)上,通(tong)過涂布機烘箱烘干,再由對(dui)輥壓實(shi)后,沖切成各種型號的極片。
所述(shu)溶劑為水、乙醇(chun)、乙二醇(chun)、甲醇(chun)、異丙醇(chun)、丙酮(tong)和N-甲基吡咯烷酮(tong)中(zhong)的一(yi)種或多(duo)種。
所述的(de)粘結劑是丁本橡(xiang)膠或聚偏氟乙烯。
所述的漿料的粘度達(da)到1000~15000mPa·s。
氯(lv)化鉀、甲基磺酸(suan)(suan)錫和鎢酸(suan)(suan)亞鈷在鋰電池中起(qi)著重要(yao)的作用,能夠大(da)大(da)提高鋰電池的耐低溫性(xing)能,提高低溫下(xia)充(chong)(chong)電電壓和延長充(chong)(chong)電時間(jian)。
本(ben)發明出料(liao)時粘(zhan)度、漿料(liao)固含量(liang)、均能(neng)很好控(kong)制。
本(ben)發(fa)明的配方在涂(tu)布過程中涂(tu)布流暢無氣泡、無劃痕、漿料流動性(xing)好。
本發明做(zuo)出電池內阻(zu)小(xiao),以(yi)實(shi)施例(li)3為例(li),內阻(zu)可控制在0.2mΩ(以(yi)使用日置內阻(zu)儀HIOKI 3554測量(liang))。
本發明(ming)做(zuo)出(chu)電池(chi)容(rong)量遞減率下降(jiang)緩慢、循環性能好,電池(chi)壽命(ming)長。以(yi)實施例(li)3為例(li),容(rong)量在(zai)循環2000次以(yi)后容(rong)量遞減率可控制在(zai)20%以(yi)內。
本發(fa)明的(de)有益(yi)效果是:本發(fa)明在冬天(tian)溫度(du)較低的(de)情況下充電性能仍然(ran)優異,可以(yi)延長(chang)其使用壽(shou)命。
具體實施方式:
為了使本發明(ming)(ming)實現的技術手段、創作(zuo)特征、達成目的與功效(xiao)易(yi)于明(ming)(ming)白了解(jie),下面結合具(ju)體實例,進一步闡述本發明(ming)(ming)。
一(yi)種光伏鋰離子電(dian)池電(dian)極(ji)的(de)水性組方,由以(yi)下重量份(fen)組分制成,
耐(nai)低(di)溫劑按(an)重量份(fen)包括以下組分,氯化鉀(jia)0.1~0.5份(fen)、甲(jia)基磺酸錫(xi)0.1~0.5和鎢酸亞鈷0.01~0.08份(fen)。
一種光伏鋰離子(zi)電(dian)池(chi)電(dian)極的水性組方的生產工藝,
1).取(qu)40-60%去離子水加(jia)0.5-2%食用速溶性CMC制(zhi)膠,加(jia)入到(dao)混合攪(jiao)拌(ban)(ban)機桶內(nei)攪(jiao)拌(ban)(ban)0.5~2小時制(zhi)的(de)增(zeng)稠劑備用;
2).分(fen)次投料浸泡活性(xing)物質(zhi):首次將稱取活性(xing)物總(zong)量的(de)50%投入容(rong)器中,加入去(qu)(qu)離子水(shui)(shui)總(zong)量的(de)25%,待水(shui)(shui)份吸收(shou)后再(zai)進行二(er)次投料,將剩余的(de)活性(xing)物質(zhi)50%以及全(quan)部耐低溫(wen)劑(ji)投入容(rong)器中,再(zai)加入去(qu)(qu)離子水(shui)(shui)總(zong)量的(de)25%,充分(fen)浸泡2~4小時;
3).將已制好的膠加入到(dao)浸泡好的活(huo)性(xing)物(wu)質,進行攪拌1~2小時;
4).加入增稠劑混合,進(jin)行攪拌(ban)0.5~1小時;
5).測(ce)粘(zhan)度,粘(zhan)度控(kong)制需達到(dao)工藝要求;
6).將漿(jiang)料用(yong)100~120目(mu)的篩網過(guo)濾;
7).將漿料均勻(yun)涂在金(jin)屬箔上,通過涂布機烘箱烘干(gan),再由(you)對(dui)輥壓實后,沖切(qie)成各種(zhong)型(xing)號的(de)極片。
溶劑為水(shui)、乙醇、乙二醇、甲醇、異丙醇、丙酮和N-甲基吡(bi)咯烷酮中的(de)一種或多種。
粘結劑是(shi)丁本(ben)橡膠或聚偏氟(fu)乙烯。
漿料(liao)的粘(zhan)度達到(dao)1000~15000mPa·s。
以(yi)上顯示和(he)(he)描述了本(ben)(ben)(ben)發(fa)(fa)明(ming)(ming)(ming)的(de)(de)基本(ben)(ben)(ben)原理(li)和(he)(he)主(zhu)要(yao)特征(zheng)和(he)(he)本(ben)(ben)(ben)發(fa)(fa)明(ming)(ming)(ming)的(de)(de)優點。本(ben)(ben)(ben)行業的(de)(de)技術(shu)人員應該了解,本(ben)(ben)(ben)發(fa)(fa)明(ming)(ming)(ming)不(bu)受上述實施(shi)例(li)的(de)(de)限制,上述實施(shi)例(li)和(he)(he)說(shuo)明(ming)(ming)(ming)書中描述的(de)(de)只(zhi)是(shi)說(shuo)明(ming)(ming)(ming)本(ben)(ben)(ben)發(fa)(fa)明(ming)(ming)(ming)的(de)(de)原理(li),在不(bu)脫離本(ben)(ben)(ben)發(fa)(fa)明(ming)(ming)(ming)精神(shen)和(he)(he)范(fan)圍的(de)(de)前提下,本(ben)(ben)(ben)發(fa)(fa)明(ming)(ming)(ming)還會(hui)有各種變化和(he)(he)改(gai)進,這(zhe)些變化和(he)(he)改(gai)進都落入要(yao)求保護(hu)的(de)(de)本(ben)(ben)(ben)發(fa)(fa)明(ming)(ming)(ming)范(fan)圍內。本(ben)(ben)(ben)發(fa)(fa)明(ming)(ming)(ming)要(yao)求保護(hu)范(fan)圍由所附的(de)(de)權利要(yao)求書及其(qi)等效物界定。