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一、锂电池的可(ke)用容(rong)量

可(ke)用容(rong)量可(ke)能只能用80-90%。锂电(dian)(dian)(dian)(dian)池的(de)(de)化学容(rong)量是在(zai)电(dian)(dian)(dian)(dian)流很小(xiao)的(de)(de)时(shi)候测量的(de)(de)，它更(geng)多的(de)(de)是由电(dian)(dian)(dian)(dian)池本(ben)身的(de)(de)特性(xing)决定(ding)的(de)(de)。实(shi)际(ji)的(de)(de)，锂电(dian)(dian)(dian)(dian)池在(zai)实(shi)际(ji)使用过程中，因为有一(yi)定(ding)的(de)(de)放(fang)(fang)(fang)电(dian)(dian)(dian)(dian)电(dian)(dian)(dian)(dian)流，放(fang)(fang)(fang)电(dian)(dian)(dian)(dian)曲(qu)线(xian)(xian)(xian)将低(di)于(yu)开路电(dian)(dian)(dian)(dian)压曲(qu)线(xian)(xian)(xian)，这条(tiao)曲(qu)线(xian)(xian)(xian)可(ke)以看出，由于(yu)电(dian)(dian)(dian)(dian)池内(nei)阻(zu)的(de)(de)存(cun)(cun)在(zai)，实(shi)际(ji)放(fang)(fang)(fang)电(dian)(dian)(dian)(dian)曲(qu)线(xian)(xian)(xian)是蓝(lan)色的(de)(de)，蓝(lan)色曲(qu)线(xian)(xian)(xian)和红色曲(qu)线(xian)(xian)(xian)对应于(yu)Quse，实(shi)际(ji)上是指电(dian)(dian)(dian)(dian)池的(de)(de)可(ke)用容(rong)量。在(zai)这条(tiao)曲(qu)线(xian)(xian)(xian)中，我们发(fa)现由于(yu)电(dian)(dian)(dian)(dian)池内(nei)阻(zu)的(de)(de)存(cun)(cun)在(zai)，这条(tiao)曲(qu)线(xian)(xian)(xian)的(de)(de)位置向下移动，所以放(fang)(fang)(fang)电(dian)(dian)(dian)(dian)会(hui)更(geng)早到达(da)放(fang)(fang)(fang)电(dian)(dian)(dian)(dian)终止电(dian)(dian)(dian)(dian)压，也就(jiu)是更(geng)早到达(da)EDV。所以Quse一(yi)般(ban)小(xiao)于(yu)Qmax。

二、锂电池的剩余(yu)容(rong)量

剩余(yu)(yu)容量(liang)(liang)是(shi)指电(dian)池(chi)在当前状态(tai)(tai)下放(fang)(fang)(fang)入EDV的(de)(de)(de)容量(liang)(liang)，即终止放(fang)(fang)(fang)电(dian)电(dian)压(ya)。在图(tu)中，电(dian)流(liu)(liu)(liu)(liu)状态(tai)(tai)A在给定(ding)的(de)(de)(de)电(dian)流(liu)(liu)(liu)(liu)下被释放(fang)(fang)(fang)。当放(fang)(fang)(fang)电(dian)达到3.0V时(shi)，对(dui)应的(de)(de)(de)剩余(yu)(yu)容量(liang)(liang)记为R1。如果在状态(tai)(tai)A的(de)(de)(de)情(qing)况下，释放(fang)(fang)(fang)了更(geng)大的(de)(de)(de)电(dian)流(liu)(liu)(liu)(liu)，这条(tiao)曲线的(de)(de)(de)位(wei)(wei)置会比开路(lu)电(dian)压(ya)略低(di)，也会比RM1小电(dian)流(liu)(liu)(liu)(liu)放(fang)(fang)(fang)电(dian)所对(dui)应的(de)(de)(de)位(wei)(wei)置略低(di)，那(nei)么此时(shi)得到的(de)(de)(de)剩余(yu)(yu)容量(liang)(liang)为RM2。RM2和RM1的(de)(de)(de)区别(bie)在于使(shi)用的(de)(de)(de)放(fang)(fang)(fang)电(dian)电(dian)流(liu)(liu)(liu)(liu)不同。放(fang)(fang)(fang)电(dian)电(dian)流(liu)(liu)(liu)(liu)越大，曲线位(wei)(wei)置越低(di)，剩余(yu)(yu)容量(liang)(liang)越小。因(yin)此，电(dian)池(chi)的(de)(de)(de)剩余(yu)(yu)容量(liang)(liang)与放(fang)(fang)(fang)电(dian)速率有关，不同电(dian)流(liu)(liu)(liu)(liu)下电(dian)池(chi)的(de)(de)(de)剩余(yu)(yu)容量(liang)(liang)是(shi)不同的(de)(de)(de)。