BQ28Z610-R1: How long lifetime data is written to RAM?

Hello,

The device keeps the data in RAM and data is only written to DF under certain conditions. Please see below.



Regards,

Jose Couso

Thanks,but this didn't resolve my issue. I mean in the condition of LF_EN=1 and no PF,how long is the duration time of voltage then the voltage data will be recored in RAM?  not the time RAM data update to DF.

Hello Ran,

Would you please elaborate more on your question?

Regards,
Jose

If I am understanding right your question, the gauge will update the cell voltage every 1 second, if there's a change in cell voltage within 250 ms, chances are the gauge will miss this value.

Regards,
Jose

Hello Jose,

Thanks, and if a change in cell voltage over 250ms can this value be recored by the gauge? 

if there is AOLD(31ms) or ASCC(427us) or ASCD(427us),the gauge will miss this current value,is it right? 

Hello Ran,

It will still not be recorded since the gauge samples/stores every 1 second. The gauge will store the cell voltage measured at the 250ms * 4 = 1000 ms

Ran Zhang said:

if there is AOLD(31ms) or ASCC(427us) or ASCD(427us),the gauge will miss this current value,is it right? 

The gauge is validated and tested to respond  and act upon protections. The gauge will sense the current, and trigger protections. The difference here is that gauge will data log every 1 second, but the gauge will still respond.

Regards,
Jose Couso

Jose Couso said:

It will still not be recorded since the gauge samples/stores every 1 second. The gauge will store the cell voltage measured at the 250ms * 4 = 1000 ms

Hello Jose,

Suppose that during the first 250ms cell voltage is 4500mV,during the second 250ms cell voltage is 4550mV,during the third 250ms cell voltage is 4600mV,during the fourth  250ms cell voltage is 4570mV,then 4600mV is record in gauge,is it right?

Hello Ran,

That is correct. Although, I do not expect the cell voltage to change that fast. The gauge is accurate enough to record a smooth sequence of cell voltages. 

Regards,
Jose