鋰電放電倍率是什么？鋰電池放(fang)電(dian)率(lv)越(yue)(yue)(yue)大(da)(da)越(yue)(yue)(yue)好么？我們都知道，鋰(li)(li)電(dian)池(chi)(chi)隨著充放(fang)電(dian)次數的增加(jia)，容量(liang)會越(yue)(yue)(yue)來越(yue)(yue)(yue)少，直接表現就是(shi)(shi)鋰(li)(li)電(dian)池(chi)(chi)的性能越(yue)(yue)(yue)來越(yue)(yue)(yue)差。同款電(dian)池(chi)(chi)，長期(qi)大(da)(da)倍(bei)率(lv)放(fang)電(dian)，對循環壽(shou)命(ming)也是(shi)(shi)有影響的，循環壽(shou)命(ming)會衰(shuai)減的更快。那么鋰(li)(li)電(dian)放(fang)電(dian)倍(bei)率(lv)是(shi)(shi)什么？鋰(li)(li)電(dian)池(chi)(chi)放(fang)電(dian)率(lv)越(yue)(yue)(yue)大(da)(da)越(yue)(yue)(yue)好么？

鋰電(dian)放電(dian)倍率是什么？

放(fang)(fang)電(dian)(dian)(dian)倍率(lv)，是(shi)(shi)指電(dian)(dian)(dian)池(chi)在規(gui)定(ding)的(de)(de)時間(jian)內(nei)(nei)放(fang)(fang)出其額(e)定(ding)容(rong)(rong)量(liang)時所需要的(de)(de)電(dian)(dian)(dian)流值，它(ta)在數(shu)據值上(shang)等于電(dian)(dian)(dian)池(chi)額(e)定(ding)容(rong)(rong)量(liang)的(de)(de)倍數(shu)，通常以字母(mu)C表示。每(mei)一個(ge)電(dian)(dian)(dian)池(chi)的(de)(de)容(rong)(rong)量(liang)在一定(ding)時間(jian)內(nei)(nei)是(shi)(shi)一定(ding)量(liang)的(de)(de)，鋰電(dian)(dian)(dian)池(chi)的(de)(de)放(fang)(fang)電(dian)(dian)(dian)倍率(lv)是(shi)(shi)指與常規(gui)放(fang)(fang)電(dian)(dian)(dian)相比(bi)，在同(tong)(tong)(tong)等時間(jian)內(nei)(nei)，放(fang)(fang)電(dian)(dian)(dian)量(liang)是(shi)(shi)常規(gui)放(fang)(fang)電(dian)(dian)(dian)的(de)(de)幾倍。在不(bu)(bu)同(tong)(tong)(tong)電(dian)(dian)(dian)流下(xia)能放(fang)(fang)出的(de)(de)能量(liang)，一般而言，電(dian)(dian)(dian)芯都需要測試(shi)在不(bu)(bu)同(tong)(tong)(tong)恒流情況下(xia)的(de)(de)放(fang)(fang)電(dian)(dian)(dian)性能。

當用(yong)電(dian)(dian)(dian)池(chi)1C容量的N倍電(dian)(dian)(dian)流(liu)放電(dian)(dian)(dian)，其(qi)放出容量在(zai)電(dian)(dian)(dian)池(chi)1C容量的85%以上時，我們(men)認為電(dian)(dian)(dian)池(chi)的放電(dian)(dian)(dian)倍率為N倍率。放電(dian)(dian)(dian)平臺(tai)與(yu)電(dian)(dian)(dian)池(chi)的放電(dian)(dian)(dian)倍率(電(dian)(dian)(dian)流(liu))相關(guan)，放電(dian)(dian)(dian)倍率越高放電(dian)(dian)(dian)平臺(tai)電(dian)(dian)(dian)壓越低，

測驗鋰電池放電倍率：正常鋰電放電倍率標準是1C，在的單(dan)個(ge)電池上指(zhi)放電電流為1.1A，如果(guo)要測試(shi)1C的時間，可(ke)以接個(ge)4瓦左右功率用電器來測試(shi)。

鋰電池放(fang)電率越(yue)大(da)越(yue)好？

首先，過高和過低(di)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)量狀態(tai)對鋰電(dian)(dian)(dian)(dian)(dian)池的(de)(de)(de)壽命有最(zui)不利(li)的(de)(de)(de)影響(xiang)，而充(chong)放(fang)電(dian)(dian)(dian)(dian)(dian)循(xun)環次(ci)數反(fan)而是(shi)次(ci)要的(de)(de)(de)。其實，大多數售賣電(dian)(dian)(dian)(dian)(dian)器或電(dian)(dian)(dian)(dian)(dian)池上標識的(de)(de)(de)可反(fan)復充(chong)電(dian)(dian)(dian)(dian)(dian)次(ci)數，都是(shi)以(yi)放(fang)電(dian)(dian)(dian)(dian)(dian)百分(fen)之80為(wei)基(ji)準測試得出的(de)(de)(de)。長期(qi)低(di)電(dian)(dian)(dian)(dian)(dian)量或者無電(dian)(dian)(dian)(dian)(dian)量的(de)(de)(de)狀態(tai)則會(hui)使電(dian)(dian)(dian)(dian)(dian)池內部對電(dian)(dian)(dian)(dian)(dian)子移(yi)動的(de)(de)(de)阻力越(yue)來越(yue)大，于是(shi)導致電(dian)(dian)(dian)(dian)(dian)池容(rong)量變小。

其次(ci)，溫(wen)度對鋰(li)電池(chi)壽命(ming)也(ye)有較大的(de)影響。冰點以(yi)下的(de)環境有可能使鋰(li)電池(chi)在(zai)電子產(chan)品(pin)打開的(de)瞬(shun)間燒毀，而(er)過熱的(de)環境則會縮減電池(chi)的(de)容量。

鋰電池(chi)(chi)放電放得(de)越盡，電池(chi)(chi)的損耗就會越大。給電池(chi)(chi)充電充得(de)越滿，電池(chi)(chi)的損耗也會越大。鋰電池(chi)(chi)最好是處于電量(liang)的中間狀態，那樣的話電池(chi)(chi)壽命最長。不同(tong)于正常充放電循(xun)環，在過充條件(jian)下充電倍(bei)率(lv)越小則對于鋰離子電池(chi)(chi)的壽命衰降越嚴重。

限制鋰電池(chi)的(de)充放電倍率性(xing)能的(de)因素

1.鋰電池的內阻

一般在(zai)正極活(huo)性物(wu)質內(nei)部會添加導(dao)電(dian)(dian)劑，從而降低活(huo)性物(wu)質之(zhi)間、活(huo)性物(wu)質與正極基體/集流(liu)體的接觸電(dian)(dian)阻(zu)，改善正極材(cai)料的電(dian)(dian)導(dao)率(lv)(離(li)子和電(dian)(dian)子電(dian)(dian)導(dao)率(lv))，提升倍(bei)率(lv)性能。不同(tong)材(cai)料不同(tong)形(xing)狀的導(dao)電(dian)(dian)劑，都會對鋰(li)電(dian)(dian)池的內(nei)阻(zu)產生影響(xiang)，進(jin)而影響(xiang)其倍(bei)率(lv)性能。

2.電(dian)解(jie)質(zhi)的離(li)子(zi)電(dian)導率(lv)

電(dian)解(jie)質的(de)離(li)子(zi)電(dian)導率(lv)如同水的(de)阻(zu)力一樣，對鋰(li)離(li)子(zi)游泳的(de)速度有(you)非常(chang)大(da)的(de)影(ying)響。目前鋰(li)離(li)子(zi)電(dian)池所(suo)采用的(de)有(you)機電(dian)解(jie)質，不管(guan)是液體電(dian)解(jie)質，還是固(gu)體電(dian)解(jie)質，其離(li)子(zi)電(dian)導率(lv)都不是很(hen)高。電(dian)解(jie)質的(de)電(dian)阻(zu)成為整(zheng)個電(dian)池電(dian)阻(zu)的(de)重要組成部分(fen)，對鋰(li)電(dian)池高倍率(lv)性能的(de)影(ying)響不容忽(hu)視(shi)。

鋰(li)離(li)子電(dian)池(chi)(chi)的(de)充(chong)放電(dian)倍率，決(jue)定(ding)了我們(men)可(ke)以(yi)以(yi)多快的(de)速(su)度，將一定(ding)的(de)能(neng)(neng)量存儲到電(dian)池(chi)(chi)里(li)面，或者以(yi)多快的(de)速(su)度，將電(dian)池(chi)(chi)里(li)面的(de)能(neng)(neng)量釋放出來一般(ban)而言，過放電(dian)會(hui)使(shi)鋰(li)電(dian)池(chi)(chi)內壓升高(gao)，正負極(ji)活性物質可(ke)逆(ni)性受(shou)到破壞，即使(shi)充(chong)電(dian)也只能(neng)(neng)部分(fen)恢復，容量也會(hui)有明顯衰(shuai)減。