BQ4050: 满电后，恒流放电时，RSOC电量百分比突然掉下去，什么原因？

您好，导入GPCCEDV报告推荐的参数以后是否完整的学习。需要更新EDV0-EDV2的数据。

GPC_CEDE:

GPC CEDV tool, rev=60
Configuration used in present fit
ProcessingType=1
NumCellSeries=1
CellTermV=2500
LearnSOC%=7
FitMaxSOC%=9
FitMinSOC%=3
ChemType=4
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 3558
EDVC0 427
EDVC1 0
EDVR1 231
EDVR0 1446
EDVT0 1106
EDVTC 11
VOC75 3317
VOC50 3291
VOC25 3240


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 1.03935862717195 1
roomtemp_highrate.csv -1.00978888520085 1
hightemp_lowrate.csv -0.606935153142983 1
hightemp_highrate.csv -1.38639747773708 1
lowtemp_lowrate.csv -0.275100967537564 1
lowtemp_highrate.csv -0.840727922727811 1

Deviations are within recomended range. CEDV parameters are suitable for programming the gauge

************************************************

OCV11:

SOC, % OCV, mV
0 2513
10 3036
20 3097
30 3118
40 3145
50 3162
60 3177
70 3187
80 3191
90 3194
100 3301

我看到TMR文档有介绍，但看不明白这些公式。上面是CEDV-report的信息，请问应该如何来确定EDV0-EDV2的数据?

CEDV模式，可以将EDV0-EDV2这些参数读出来？

您好，CEDV模式，EDV0这些参数是不能读取的， BQ4050 为例，设置参数 Settings >> Configuration >> CEDV Gauging Configuration [EDV_CMP]=1 即可用 Compensated EDV，动态计算 EDV2/EDV1/EDV0 电压。

详细请参考下面文档3.2 CEDV 电量计算法原理

www.ti.com.cn/.../zhcaaf7.pdf

将cedv-report参数写到cedv-cfg了，然后学习一次电量，max error是8%，是学习成功了？

但从RC与FCC来看，与电池的容量是匹配的。

您好，

Max error just counts up as a function of senseR size and amount of charge accumulated. it gets reset to 2% when you get a value FCC update. The use is just a way to show that you have not successfully learned FCC in a while and you could have potential coulomb counter error accumulated. 

FCCX will toggle for every FCC update performed. with a Max Error of 8% FCC learning was not done for some amount of time. Meaning a "qualified" discharge never happened for a bit. 

在电量学习中，放电时，我看到VDQ和EDV2都有效了（变红色），并且电量也达到了7%，为什么还出现不符合的学习呢？

您好， 放电不合格可能和您的放电条件和温度等因素有关。