2022-06-29
锂电池组通(tong)常由一个或多个电池组并(bing)联组成,可满足笔记(ji)本电脑、医疗设(she)备、测试仪(yi)器和(he)(he)工业(ye)应(ying)用的电压和(he)(he)功率要求,但其(qi)很能发挥出(chu)大(da)功效,因(yin)为(wei)电池串联的容(rong)量不匹配将减少整(zheng)个电池组的容(rong)量。
电池容(rong)(rong)量(liang)失配包括充电状(zhuang)态(tai)(SOC)失配和容(rong)(rong)量(liang)/能量(liang)(C/E)失配。在这两种情况下,锂电池组的总容(rong)(rong)量(liang)只(zhi)是弱电池的容(rong)(rong)量(liang)。
在大多数情况下,电池(chi)(chi)不(bu)匹配是由不(bu)完善(shan)的(de)(de)工(gong)艺(yi)控制(zhi)和检测造(zao)(zao)成的(de)(de),而(er)不(bu)是由锂(li)离(li)子本(ben)身(shen)的(de)(de)化(hua)学性质的(de)(de)变化(hua)。棱柱形锂(li)电池(chi)(chi)在制(zhi)造(zao)(zao)时(shi)需(xu)要(yao)更(geng)(geng)多的(de)(de)机械压力(li),电池(chi)(chi)之间的(de)(de)差异(yi)(yi)更(geng)(geng)大。此外,由于采用(yong)了(le)新工(gong)艺(yi),聚合物(wu)锂(li)离(li)子电池(chi)(chi)也可能(neng)因电池(chi)(chi)而(er)异(yi)(yi)。
电(dian)池(chi)(chi)均衡技术可(ke)以解决SOC和C/E不匹配(pei)(pei)问(wen)题,从而提高(gao)串联锂电(dian)池(chi)(chi)组(zu)的性能(neng)。可(ke)以通过在初(chu)始(shi)调整过程中对电(dian)池(chi)(chi)进(jin)(jin)行(xing)均衡来纠正(zheng)电(dian)池(chi)(chi)不匹配(pei)(pei)的问(wen)题,然后(hou)在充电(dian)过程中进(jin)(jin)行(xing)均衡,而CE不匹配(pei)(pei)必(bi)须在充放电(dian)过程中都进(jin)(jin)行(xing)均衡。
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