我們(men)前面講過(guo),鋰(li)(li)電(dian)(dian)太陽(yang)能(neng)路(lu)燈和(he)(he)太陽(yang)能(neng)庭院燈系統中(zhong)使用的(de)鋰(li)(li)電(dian)(dian)池(chi)(chi)(chi)(chi)是由鋰(li)(li)電(dian)(dian)芯+BMS保(bao)(bao)護(hu)(hu)板+支架或者外(wai)殼+導(dao)線+其(qi)它輔料組成的(de),那么這個保(bao)(bao)護(hu)(hu)板(BMS或稱PCM)究竟是做什么的(de)呢?一般離電(dian)(dian)池(chi)(chi)(chi)(chi)保(bao)(bao)護(hu)(hu)板要(yao)具有(you)過(guo)充保(bao)(bao)護(hu)(hu),過(guo)放保(bao)(bao)護(hu)(hu),過(guo)流(liu)保(bao)(bao)護(hu)(hu),短路(lu)保(bao)(bao)護(hu)(hu)等(deng)對鋰(li)(li)電(dian)(dian)池(chi)(chi)(chi)(chi)的(de)保(bao)(bao)護(hu)(hu)功能(neng)。這是因為(wei)鋰(li)(li)電(dian)(dian)池(chi)(chi)(chi)(chi)在(zai)正(zheng)常(chang)使用過(guo)程(cheng)中(zhong),其(qi)內(nei)(nei)部(bu)(bu)要(yao)進(jin)行電(dian)(dian)能(neng)與化(hua)學(xue)能(neng)相互轉化(hua)的(de)化(hua)學(xue)反應,但(dan)在(zai)某些(xie)特(te)殊(shu)條件(jian)下,如(ru)鋰(li)(li)電(dian)(dian)池(chi)(chi)(chi)(chi)發(fa)生(sheng)過(guo)充電(dian)(dian)、過(guo)放電(dian)(dian)和(he)(he)過(guo)電(dian)(dian)流(liu)等(deng)現象將會導(dao)致電(dian)(dian)池(chi)(chi)(chi)(chi)內(nei)(nei)部(bu)(bu)發(fa)生(sheng)非(fei)正(zheng)常(chang)化(hua)學(xue)反應,將嚴重影響電(dian)(dian)池(chi)(chi)(chi)(chi)的(de)性(xing)能(neng)與使用壽命(ming),這時(shi)候還可(ke)能(neng)產(chan)生(sheng)大量氣體,使電(dian)(dian)池(chi)(chi)(chi)(chi)內(nei)(nei)部(bu)(bu)壓力迅(xun)速增大后造成爆炸,因此所有(you)的(de)鋰(li)(li)離子(zi)電(dian)(dian)池(chi)(chi)(chi)(chi)都會設計(ji)保(bao)(bao)護(hu)(hu)電(dian)(dian)路(lu),用于對鋰(li)(li)電(dian)(dian)池(chi)(chi)(chi)(chi)的(de)充、放電(dian)(dian)狀(zhuang)態進(jin)行有(you)效監測和(he)(he)控制,并在(zai)某些(xie)條件(jian)下關斷充、放電(dian)(dian)回路(lu)以防止(zhi)對電(dian)(dian)池(chi)(chi)(chi)(chi)發(fa)生(sheng)損害(hai)。
我們(men)(men)常用的(de)(de)(de)太陽能(neng)(neng)(neng)(neng)路燈(deng)和(he)(he)太陽能(neng)(neng)(neng)(neng)庭院燈(deng)鋰電(dian)池的(de)(de)(de)電(dian)芯(xin)(xin)一般都是(shi)18650,這(zhe)些個(ge)(ge)數(shu)字都代(dai)(dai)表(biao)什么意思呢?簡(jian)單的(de)(de)(de)說這(zhe)些數(shu)字代(dai)(dai)表(biao)這(zhe)個(ge)(ge)電(dian)芯(xin)(xin)是(shi)圓柱形(xing)鋰電(dian)電(dian)芯(xin)(xin),18代(dai)(dai)表(biao)這(zhe)個(ge)(ge)電(dian)芯(xin)(xin)的(de)(de)(de)直徑是(shi)18mm,650是(shi)電(dian)芯(xin)(xin)長度65.0mm,其對應的(de)(de)(de)電(dian)池容量(liang)2800mAH。相對應的(de)(de)(de)我們(men)(men)太陽能(neng)(neng)(neng)(neng)路燈(deng)和(he)(he)太陽能(neng)(neng)(neng)(neng)庭院燈(deng)廠家(jia)較少使(shi)用的(de)(de)(de)26650也(ye)是(shi)圓柱形(xing),其電(dian)芯(xin)(xin)直徑26mm,電(dian)芯(xin)(xin)的(de)(de)(de)長度65.0mm,其對應的(de)(de)(de)電(dian)池容量(liang)5000mAH


