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锂电池Pack技术八项原则

2022-07-21

锂电池

锂电池Pack技术八项原则

1、容(rong)量一致性:1C电(dian)(dian)(dian)(dian)(dian)流恒(heng)流充(chong)(chong)电(dian)(dian)(dian)(dian)(dian)至(zhi)3.65V然(ran)后转至(zhi)恒(heng)压(ya)充(chong)(chong)电(dian)(dian)(dian)(dian)(dian),当电(dian)(dian)(dian)(dian)(dian)流为0.03Cs时(shi)就停(ting)止充(chong)(chong)电(dian)(dian)(dian)(dian)(dian);当电(dian)(dian)(dian)(dian)(dian)池放电(dian)(dian)(dian)(dian)(dian)时(shi),电(dian)(dian)(dian)(dian)(dian)压(ya)为2.0V时(shi)终止放电(dian)(dian)(dian)(dian)(dian),放电(dian)(dian)(dian)(dian)(dian)响应不(bu)低于额定容(rong)量的(de)95%。

2、恒(heng)(heng)流(liu)比原则:1C恒(heng)(heng)流(liu)至(zhi)2.0V时,再在1C恒(heng)(heng)流(liu)至(zhi)3.65V时,再在3.65V恒(heng)(heng)压充电(dian)(dian)(dian),电(dian)(dian)(dian)流(liu)下降至(zhi)0.03C时停止,恒(heng)(heng)流(liu)充电(dian)(dian)(dian)与总充电(dian)(dian)(dian)之比,充电(dian)(dian)(dian)恒(heng)(heng)流(liu)倍率不(bu)低于93%。

3、放(fang)电(dian)平(ping)台(tai)(tai)要求(qiu):锂电(dian)池充满(man)电(dian)后,在1C恒定(ding)电(dian)流到(dao)(dao)2.0V,并记录到(dao)(dao)3.1V的时(shi)间。放(fang)电(dian)平(ping)台(tai)(tai)不少于48。

4、自放(fang)(fang)电(dian)要求:在(zai)55℃和2℃下存放(fang)(fang)7天、在(zai)25±5℃下存放(fang)(fang)28天、45℃±2℃存放(fang)(fang)10天,测量(liang)(liang)电(dian)压(ya)、不(bu)带(dai)电(dian)25土5℃30天,测量(liang)(liang)电(dian)压(ya)。充电(dian)保持率(lv)不(bu)低于95%。开路电(dian)压(ya)不(bu)小于2.80V。

5、内阻要求:电池内阻之间的误差小于5mω。

6、锂(li)电池组之间的电压差(cha)小于5mV。

7、锂电池组间一(yi)致性(xing)越高越好。

8、循环寿(shou)命:同(tong)(tong)一(yi)批次材料、同(tong)(tong)一(yi)工艺、同(tong)(tong)一(yi)设备同(tong)(tong)时生产的同(tong)(tong)一(yi)型号电池,可组装成同(tong)(tong)一(yi)电池组;45±2℃1C条件(jian)下(xia)充(chong)放电,循环200次后,充(chong)放电容(rong)(rong)量(liang)不低于(yu)初始1C5容(rong)(rong)量(liang)的95%。


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