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BQ40Z50-R2: Full available capacity和Qmax的区别

LIU LEI
Prodigy 10 points
Part Number: BQ40Z50-R2


(1) .我在论坛看见说，Full available capacity指的是当电池处于极小电流（C/20)放电条件下可以释放出来的电量。感觉Qmax也是指在小电流放电条件下能释放出来的电量。两者有什么区别？

(2) . 根据阻抗跟踪算法，FCC＝Qstart+PassedCharge+RM      

                               RM＝(DOD final-DOD present)*Qmax

因为有电流和温度补偿，所以DOD final不是0%的OCV对应的DOD.

但如果是FAC的话，因为不计算电流和温度补偿，所以用的DOD final就是0%的OCV对应的DOD。

FCC和FAC计算公式的前2部分一样，只是RM中DOD final不一样，

可以这么理解吗？

  • 0
    TI__Guru*** 130456 points

    您好

    1， Qmax: Maximum battery chemical capacity, FAC是 the fully charged state to the terminate voltage, in mAh or mWh。一般QMAX要比FAC大。

    2， 是的，FAC未补偿，FCC有补偿

    FAC是This read-only command pair returns the uncompensated (less than C/20 load) capacity of the battery when fully charged. 

    FCC 是compensated (less than C/20 load) capacity of the battery when fully charged.