在evm板上，对单节电池进行了电量学习，并拿到GPC_CEDV文件。
现在将4节电池串在一起，然后根据《TI电量计应用指导》文档，修改了EMF和EDVR0的值。4节串联的电池充满电后，放电到3.1V，甚至放到2.8V后，EDV2和EDV1都没有亮红色，这是为什么呢？
单节电池满电放电后，EDV2会亮红色：
单节电池的学习报告：
GPC CEDV tool, rev=60 Configuration used in present fit ProcessingType=1 NumCellSeries=1 CellTermV=3000 LearnSOC%=10 FitMaxSOC%=12 FitMinSOC%=6 ChemType=1 ElapsedTimeColumn=0 VoltageColumn=1 TemperatureColumn=2 CurrentColumn=3 CEDV parameters resulting from the fit. If EDVV bit is set to 1, EMF and EDVR0 have to be multiplied by the number of serial cells when written to data flash EMF 3582 EDVC0 132 EDVC1 0 EDVR1 992 EDVR0 484 EDVT0 609 EDVTC 11 VOC75 3935 VOC50 3808 VOC25 3752 Recommended SOC deviation tolerance at EDV2 point is < 5% for low temperature and <3% for room and high temperature Deviations for this set of parameters are given below for each file file SOC error, % pass roomtemp_lowrate.csv -0.118295471881373 1 roomtemp_highrate.csv -0.310936483014437 1 hightemp_lowrate.csv 0.103482113199268 1 hightemp_highrate.csv 0.978585026499113 1 lowtemp_lowrate.csv 0.377752707353737 1 lowtemp_highrate.csv -0.713995294834259 1 Deviations are within recomended range. CEDV parameters are suitable for programming the gauge
根据《TI电量计应用指导》来修改 EMF 和 EDVR0 值：
但电池放电电压在3.1V，甚至2.8V后，出没有见EVD2或EVD1亮红色：
请问，这是什么原因呢？
