深(shen)度分析(xi)12V锂电池保护板电路图工作原(yuan)理与特点(dian)应用-KIA MOS管
信息来源：本站 日期(qi)：2018-01-10
12V锂(li)(li)电池(chi)保护板(ban)(ban)，16串磷酸铁锂(li)(li)电池(chi)保护板(ban)(ban)，18650电池(chi)维护板(ban)(ban)，线路板(ban)(ban)厂在双面线路板(ban)(ban)设计(ji)时(shi)都(dou)(dou)会优(you)先思索锂(li)(li)电池(chi)保护板(ban)(ban)工(gong)作原(yuan)理(li)，电池(chi)之都(dou)(dou)带大家看(kan)一个单节电芯的(de)锂(li)(li)电池(chi)保护板(ban)(ban)原(yuan)理(li)，希望能起(qi)到触类旁(pang)通的(de)作用。
锂(li)电池保护(hu)板(ban)依据运用IC，电压等不同(tong)而电路及参数(shu)有所(suo)不同(tong)，下面以(yi)DW01配(pei)MOS管8810A停止散布，其(qi)中包括其(qi)锂(li)电池保护(hu)板(ban)的正常工作行(xing)为(wei)。
当电(dian)(dian)芯电(dian)(dian)压(ya)在2.5V至4.3V之间(jian)时(shi)(shi)(shi)，DW01 的(de)(de)(de)第(di)(di)1脚(jiao)、第(di)(di)3脚(jiao)均输(shu)出高电(dian)(dian)平(等于(yu)供电(dian)(dian)电(dian)(dian)压(ya))，第(di)(di)二(er)脚(jiao)电(dian)(dian)压(ya)为0V。此时(shi)(shi)(shi)DW01 的(de)(de)(de)第(di)(di)1脚(jiao) 、第(di)(di)3脚(jiao)电(dian)(dian)压(ya)将分别加到8810的(de)(de)(de)第(di)(di)5、4脚(jiao)，8810内的(de)(de)(de)两个电(dian)(dian)子(zi)开关因(yin)其G极接(jie)到来自DW01 的(de)(de)(de)电(dian)(dian)压(ya)，故均处于(yu)导通(tong)状态(tai)，即两个电(dian)(dian)子(zi)开关均处于(yu)开状态(tai)。此时(shi)(shi)(shi)电(dian)(dian)芯的(de)(de)(de)负极与维(wei)护板(ban)的(de)(de)(de)P-端相当于(yu)直接(jie)连通(tong)，维(wei)护板(ban)有电(dian)(dian)压(ya)输(shu)出。
当电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)(xin)(xin)(xin)经(jing)(jing)过(guo)(guo)外接的(de)(de)负载停止放(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)时(shi)(shi)(shi)，电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)(xin)(xin)(xin)的(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)将(jiang)渐(jian)渐(jian)降(jiang)低(di)，同时(shi)(shi)(shi)DW01内部(bu)将(jiang)经(jing)(jing)过(guo)(guo)R1电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻实(shi)时(shi)(shi)(shi)监测(ce)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)(xin)(xin)(xin)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)，当电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)(xin)(xin)(xin)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)降(jiang)落到约2.3V时(shi)(shi)(shi)DW01将(jiang)以为电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)(xin)(xin)(xin)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)已处于(yu)(yu)过(guo)(guo)放(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)状(zhuang)态(tai)(tai)，便立刻(ke)断开(kai)第1脚的(de)(de)输出电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)，使第1脚电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)变为0V，8810内的(de)(de)开(kai)关(guan)管因第5脚无电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)而关(guan)闭。此(ci)时(shi)(shi)(shi)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)(xin)(xin)(xin)的(de)(de)B-与维(wei)护(hu)(hu)板的(de)(de)P-之(zhi)间处于(yu)(yu)断开(kai)状(zhuang)态(tai)(tai)。即电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)(xin)(xin)(xin)的(de)(de)放(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)回路被切断，电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)(xin)(xin)(xin)将(jiang)中(zhong)止放(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)。保(bao)护(hu)(hu)板处于(yu)(yu)过(guo)(guo)放(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)状(zhuang)态(tai)(tai)并不断坚(jian)持(chi)。等到保(bao)护(hu)(hu)板的(de)(de)P与P-间接上充电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)后(hou)，DW01经(jing)(jing)B-检测(ce)到充电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)后(hou)便立刻(ke)中(zhong)止过(guo)(guo)放(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)状(zhuang)态(tai)(tai)，重新(xin)在第1脚输出高电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)，使8810内的(de)(de)过(guo)(guo)放(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)控制(zhi)管导通，即电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)(xin)(xin)(xin)的(de)(de)B-与维(wei)护(hu)(hu)板的(de)(de)P-又重新(xin)接上，电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)(xin)(xin)(xin)经(jing)(jing)充电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)直接充电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)。
当电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池经过(guo)充(chong)(chong)(chong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器正常充(chong)(chong)(chong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)时(shi)，随着充(chong)(chong)(chong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)时(shi)间(jian)的(de)(de)增加(jia)，电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)的(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压将越来越高，当电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压升高到4.4V时(shi)，DW01将以为电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压已处于过(guo)充(chong)(chong)(chong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压状态，便立刻(ke)断(duan)开(kai)第3脚的(de)(de)输出电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压，使(shi)第3脚电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压变为0V，8810内(nei)的(de)(de)开(kai)关管因第4脚无电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压而关闭。此时(shi)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)的(de)(de)B-与(yu)维(wei)(wei)护(hu)板的(de)(de)P-之(zhi)间(jian)处于断(duan)开(kai)状态。即(ji)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)的(de)(de)充(chong)(chong)(chong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)回(hui)路(lu)被切断(duan)，电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)将中止(zhi)充(chong)(chong)(chong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)。保护(hu)板处于过(guo)充(chong)(chong)(chong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)状态并不断(duan)坚持(chi)。等(deng)到保护(hu)板的(de)(de)P与(yu)P-间(jian)接(jie)上放(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)负载(zai)后，因而时(shi)固然过(guo)充(chong)(chong)(chong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)控(kong)制开(kai)关管关闭，但其内(nei)部的(de)(de)二(er)极管正方(fang)向与(yu)放(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)回(hui)路(lu)的(de)(de)方(fang)向相同，故(gu)放(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)回(hui)路(lu)能够停止(zhi)放(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，当电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)的(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压被放(fang)到低于4.3V时(shi)，DW01中止(zhi)过(guo)充(chong)(chong)(chong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)维(wei)(wei)护(hu)状态重新(xin)在第3脚输出高电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压，使(shi)8810内(nei)的(de)(de)过(guo)充(chong)(chong)(chong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)控(kong)制管导通，即(ji)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)的(de)(de)B-与(yu)维(wei)(wei)护(hu)板P-又重新(xin)接(jie)上，电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)又能停止(zhi)正常的(de)(de)充(chong)(chong)(chong)放(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)。
在保(bao)护板对外(wai)放(fang)(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)过(guo)程(cheng)中(zhong)，8810内(nei)(nei)的(de)(de)(de)两个(ge)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)子开(kai)(kai)关(guan)(guan)(guan)(guan)并不(bu)完整等(deng)效(xiao)于(yu)(yu)(yu)(yu)两个(ge)机械开(kai)(kai)关(guan)(guan)(guan)(guan)，而是(shi)(shi)(shi)等(deng)效(xiao)于(yu)(yu)(yu)(yu)两个(ge)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)很(hen)小(xiao)的(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)，并称为8810的(de)(de)(de)导(dao)(dao)通(tong)(tong)内(nei)(nei)阻(zu)(zu)，每个(ge)开(kai)(kai)关(guan)(guan)(guan)(guan)的(de)(de)(de)导(dao)(dao)通(tong)(tong)内(nei)(nei)阻(zu)(zu)约为30mU03a9共约为60mU03a9，加(jia)在G极(ji)上的(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)实践上是(shi)(shi)(shi)直接控(kong)(kong)制(zhi)每个(ge)开(kai)(kai)关(guan)(guan)(guan)(guan)管(guan)的(de)(de)(de)导(dao)(dao)通(tong)(tong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)的(de)(de)(de)大小(xiao)当(dang)G极(ji)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)大于(yu)(yu)(yu)(yu)1V时，开(kai)(kai)关(guan)(guan)(guan)(guan)管(guan)的(de)(de)(de)导(dao)(dao)通(tong)(tong)内(nei)(nei)阻(zu)(zu)很(hen)小(xiao)(几十毫(hao)欧)，相当(dang)于(yu)(yu)(yu)(yu)开(kai)(kai)关(guan)(guan)(guan)(guan)闭合，当(dang)G极(ji)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)小(xiao)于(yu)(yu)(yu)(yu)0.7V以下(xia)时，开(kai)(kai)关(guan)(guan)(guan)(guan)管(guan)的(de)(de)(de)导(dao)(dao)通(tong)(tong)内(nei)(nei)阻(zu)(zu)很(hen)大(几MΩ)，相当(dang)于(yu)(yu)(yu)(yu)开(kai)(kai)关(guan)(guan)(guan)(guan)断开(kai)(kai)。电(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)UA就是(shi)(shi)(shi)8810的(de)(de)(de)导(dao)(dao)通(tong)(tong)内(nei)(nei)阻(zu)(zu)与(yu)放(fang)(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)产生的(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)，负载电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)增(zeng)(zeng)大则UA必然增(zeng)(zeng)大，因UA0.006L&TImes;IUA又称为8205A的(de)(de)(de)管(guan)压(ya)(ya)降，UA能够简接标明放(fang)(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)的(de)(de)(de)大小(xiao)。上升到0.2V时便以为负载电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)抵达了极(ji)限(xian)值(zhi)，于(yu)(yu)(yu)(yu)是(shi)(shi)(shi)中(zhong)止第1脚的(de)(de)(de)输出电(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)，使第1脚电(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)变为0V、8810内(nei)(nei)的(de)(de)(de)放(fang)(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)控(kong)(kong)制(zhi)管(guan)关(guan)(guan)(guan)(guan)闭，切断电(dian)(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)的(de)(de)(de)放(fang)(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)回路，将关(guan)(guan)(guan)(guan)断放(fang)(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)控(kong)(kong)制(zhi)管(guan)。换言之(zhi)DW01 允(yun)许(xu)输出的(de)(de)(de)最大电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)是(shi)(shi)(shi)3.3A，完成了过(guo)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)保(bao)护。
电(dian)(dian)池在(zai)对负载正常放电(dian)(dian)过(guo)程中，放电(dian)(dian)电(dian)(dian)流(liu)在(zai)经过(guo)串联的2个(ge)MOSFET时(shi)，由(you)于MOSFET的导通阻抗，会在(zai)其(qi)(qi)两端产(chan)生一个(ge)电(dian)(dian)压(ya)(ya)，该电(dian)(dian)压(ya)(ya)值U=I*RDS*2，RDS为(wei)单个(ge)MOSFET导通阻抗，控(kong)制(zhi)IC上的“V-”脚对该电(dian)(dian)压(ya)(ya)值停止检测，若负载因某种缘由(you)招(zhao)致异常，使(shi)回(hui)(hui)路电(dian)(dian)流(liu)增大，当回(hui)(hui)路电(dian)(dian)流(liu)大到使(shi)U》0.1V(该值由(you)控(kong)制(zhi)IC决议，不(bu)同的IC有(you)不(bu)同的值)时(shi)，其(qi)(qi)“DO”脚将由(you)高电(dian)(dian)压(ya)(ya)转变为(wei)零(ling)电(dian)(dian)压(ya)(ya)，使(shi)T2由(you)导通转为(wei)关断(duan)，从而切断(duan)了放电(dian)(dian)回(hui)(hui)路，使(shi)回(hui)(hui)路中电(dian)(dian)流(liu)为(wei)零(ling)，起到过(guo)电(dian)(dian)流(liu)维护作用。
发(fa)(fa)如今控(kong)制(zhi)(zhi)IC检(jian)测(ce)到(dao)过电流(liu)(liu)发(fa)(fa)作至发(fa)(fa)出关(guan)断T2信号之间(jian)，也有一段延(yan)时(shi)(shi)(shi)时(shi)(shi)(shi)间(jian)，该延(yan)时(shi)(shi)(shi)时(shi)(shi)(shi)间(jian)的(de)长短由C2决(jue)议，通(tong)常(chang)为(wei)13毫秒左(zuo)右(you)，以防止因干扰而形(xing)成误判别(bie)。在上述控(kong)制(zhi)(zhi)过程中可(ke)知，其(qi)(qi)过电流(liu)(liu)检(jian)测(ce)值大(da)小(xiao)(xiao)不只取(qu)决(jue)于(yu)控(kong)制(zhi)(zhi)IC的(de)控(kong)制(zhi)(zhi)值，还取(qu)决(jue)于(yu)MOSFET的(de)导(dao)通(tong)阻抗，当MOSFET导(dao)通(tong)阻抗越(yue)大(da)时(shi)(shi)(shi)，对同样的(de)控(kong)制(zhi)(zhi)IC，其(qi)(qi)过电流(liu)(liu)维护值越(yue)小(xiao)(xiao)。
短路保(bao)(bao)(bao)护(hu)(hu)(hu)控制过(guo)程短路保(bao)(bao)(bao)护(hu)(hu)(hu)是(shi)过(guo)电(dian)流保(bao)(bao)(bao)护(hu)(hu)(hu)的一种极(ji)限(xian)方式，其(qi)控制过(guo)程及原理(li)与过(guo)电(dian)流保(bao)(bao)(bao)护(hu)(hu)(hu)一样，短路只是(shi)在相当于在P-间加(jia)上一个阻(zu)值小的电(dian)阻(zu)(约为0Ω)使保(bao)(bao)(bao)护(hu)(hu)(hu)板的负(fu)载(zai)电(dian)流瞬时到(dao)达10A以上，维护(hu)(hu)(hu)板立刻停止(zhi)过(guo)电(dian)流保(bao)(bao)(bao)护(hu)(hu)(hu)。
锂(li)离(li)子电(dian)池以其优秀的特性(xing)，被(bei)普遍应用(yong)于： 手(shou)机(ji)、摄录像(xiang)机(ji)、笔(bi)记本(ben)电(dian)脑、无绳电(dian)话、电(dian)开(kai)工具、遥控(kong)或电(dian)动玩具、照相机(ji)等便携式电(dian)子设备中(zhong)。
锂(li)(li)(li)离(li)子(zi)(zi)电(dian)(dian)池的负极(ji)(ji)(ji)为石(shi)墨晶(jing)体，正(zheng)极(ji)(ji)(ji)通常为二氧化(hua)锂(li)(li)(li)。充(chong)电(dian)(dian)时锂(li)(li)(li)离(li)子(zi)(zi)由正(zheng)极(ji)(ji)(ji)向负极(ji)(ji)(ji)运动而嵌入(ru)石(shi)墨层(ceng)中(zhong)(zhong)。放(fang)电(dian)(dian)时，锂(li)(li)(li)离(li)子(zi)(zi)从石(shi)墨晶(jing)体内(nei)负极(ji)(ji)(ji)外表脱离(li)移向正(zheng)极(ji)(ji)(ji)。所以(yi)，在该(gai)电(dian)(dian)池充(chong)放(fang)电(dian)(dian)过程中(zhong)(zhong)锂(li)(li)(li)总是以(yi)锂(li)(li)(li)离(li)子(zi)(zi)形(xing)态呈现，而不是以(yi)金(jin)属锂(li)(li)(li)的形(xing)态呈现。因此(ci)这种(zhong)电(dian)(dian)池叫做锂(li)(li)(li)离(li)子(zi)(zi)电(dian)(dian)池，简称(cheng)锂(li)(li)(li)电(dian)(dian)池。
锂电(dian)池具有(you)：体积小(xiao)、容(rong)(rong)量大(da)、重量轻、无污(wu)染(ran)、单节电(dian)压高(gao)、自放(fang)电(dian)率低(di)、电(dian)池循环(huan)次数多等优(you)点，但(dan)价钱较贵。镍镉电(dian)池因(yin)容(rong)(rong)量低(di)，自放(fang)电(dian)严重，且(qie)对环(huan)境(jing)有(you)污(wu)染(ran)，正逐渐被淘(tao)汰。镍氢电(dian)池具有(you)较高(gao)的性(xing)能(neng)价钱比，且(qie)不污(wu)染(ran)环(huan)境(jing)，但(dan)单体电(dian)压只要(yao)1.2V，因(yin)此在运用(yong)范围上(shang)遭(zao)到(dao)限制。
相(xiang)关搜索：
联系方式(shi)：邹先生（KIA MOS管）
手机：18123972950
QQ：2880195519
联系地址：深圳市福田(tian)区车公庙天安数码城天吉(ji)大(da)厦CD座5C1
关(guan)注KIA半导(dao)体工程专辑请搜微(wei)信号(hao):“KIA半导(dao)体”或点(dian)击本文下方(fang)图片扫一(yi)扫进入官方(fang)微(wei)信“关(guan)注”
长按(an)二维码识别(bie)关注
