2022-10-28
锂电池(chi)参数不一致(zhi)主要是指容量、内阻和开路电压(ya)的不一致(zhi)。如(ru)果(guo)锂电池(chi)的电芯不一致(zhi)，则会(hui)出现以下(xia)问题：
1、容(rong)(rong)量(liang)损耗(hao)。锂(li)电(dian)池(chi)的电(dian)芯单体组成电(dian)池(chi)组，容(rong)(rong)量(liang)符合 “木桶(tong)原理(li)”。差的电(dian)芯的容(rong)(rong)量(liang)决定了整个锂(li)电(dian)池(chi)组的容(rong)(rong)量(liang)。
2、使用寿(shou)(shou)(shou)命损失。同样，锂电池(chi)组的(de)(de)寿(shou)(shou)(shou)命由寿(shou)(shou)(shou)命短的(de)(de)电芯(xin)决定(ding)。使用寿(shou)(shou)(shou)命短的(de)(de)电芯(xin)很(hen)可(ke)能(neng)是容量较小的(de)(de)电芯(xin)。小容量的(de)(de)电芯(xin)每(mei)次都充满了，而且它(ta)的(de)(de)输出(chu)太强，很(hen)可(ke)能(neng)首先(xian)达到使用寿(shou)(shou)(shou)命的(de)(de)终点，那么(me)一组焊(han)接在(zai)一起的(de)(de)电芯(xin)也将跟随寿(shou)(shou)(shou)命的(de)(de)结束。
3、内(nei)(nei)(nei)阻增(zeng)大。不(bu)同(tong)(tong)的内(nei)(nei)(nei)阻流(liu)过(guo)相(xiang)同(tong)(tong)的电(dian)流(liu)，内(nei)(nei)(nei)阻大的电(dian)芯(xin)的热量(liang)相(xiang)对较多。电(dian)池温度过(guo)高(gao)(gao)，导致更快的劣化(hua)和(he)内(nei)(nei)(nei)部电(dian)阻的进一步增(zeng)加。内(nei)(nei)(nei)阻和(he)温升(sheng)，形成(cheng)一对负反馈，使高(gao)(gao)内(nei)(nei)(nei)阻电(dian)芯(xin)加速劣化(hua)。
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