CCS/BQ27510-G3: BQ27510-G3

1,In our application, deadband of new firmware is 68. Leakage current on our board is 0.2mA when board is put in shelf. According to chemical characteristic, 100% cell will decrease 20% capacity after one year. 

What is soc reading after one year storage for one 100% cell? How about 2 years? Could you evaluate soc reading in one and two years period? Is it higher than real capacity and how much? Is it possible that soc reading is 75% but real capacity is 0% during storage? Could it make sure that cell with 75% or higher soc reading has at least 15% real capacity during two years storage period? How much is deviation between soc reading and real capacity during 2 years storage?

2,For example, soc reading of one 100% cell at the beginning of storage becomes 98%, but real capacity of cell is 80% after one year storage. Does soc reading increase from 98% to 100% when this cell is charged again after one year storage ? Or does soc reading fall to 80% and then increase to 100% ? When does this cell complete learning current characteristic? When can soc reading be accurate?

Thanks!

Sorry for so many questions, appreciate if you can answer me one by one in detail!

hi

With Smoothing enabled, if the current is less than 1mA, with a ccdeadband of 17mA, that will be discarded. The filtered SOC which is what will be reported will stay constant. The true SOC will reflect the actual value because of Rem cap simulations at grid points. If there is a tempeature change of more than 5 degrees in storage, a rem cap simulation would occur that will adjust the filtered SOC to the true SOC.

in question 2, when charging starts a rem cap simuation is run. The filtered SOC will increase to 100%. It will not jump to 80%.

pls note that the gauge reports both true SOC and filtered SOC. After being in storage, you can force filtered SOC to be equal to true by issuing a reset command or charge the cells to full (taper conditions)) or discharge to terminate voltage for the true SOC and filtered SOC to be come equal.

thanks
Onyx

Thanks for your answer above! I have further questions.
1, Is truesoc accurate in storage mode if it can't see 0.2mA leakage? Can trucesoc take capacity loss of chemical characteristic and leakage current into consideration during long term storage? How can you make sure truesoc is equal to real capacity during long term storage? How many accuracy does it have between truesoc and real capacity?
2,Our FG will be SEALED mode in production line. Could you write process about how to rest FG step by step?
3,According to your explanation, soc reading of one 100% cell will still be 100% after one year storage, but real capacity of cell will be 40%. When it is charged again after this one year storage, soc reading will increase form 100%. Is this understanding right?
4,If I disable smoothing soc function, does I need to do learning cycle again?
5,If I disable smoothing function to align soc with truesoc, what disadvantage does FG have? What happen to FG truesoc reading?
6,How does rem cap simulation work?
7,What influence does coulomb counter have for soc and truesoc during storage mode?

Thanks a lot!

Add one more question.

Thanks for your answer above! I have further questions.
1, Is truesoc accurate in storage mode if it can't see 0.2mA leakage? Can trucesoc take capacity loss of chemical characteristic and leakage current into consideration during long term storage? How can you make sure truesoc is equal to real capacity during long term storage? How many accuracy does it have between truesoc and real capacity?
2,Our FG will be SEALED mode in production line. Could you write process about how to rest FG step by step?
3,According to your explanation, soc reading of one 100% cell will still be 100% after one year storage, but real capacity of cell will be 40%. When it is charged again after this one year storage, soc reading will increase form 100%. Is this understanding right?
4,If I disable smoothing soc function, does I need to do learning cycle again?
5,If I disable smoothing function to align soc with truesoc, what disadvantage does FG have? What happen to FG truesoc reading?
6,How does rem cap simulation work?
7,What influence does coulomb counter have for soc and truesoc during storage mode?

8,When I set operation configuration D[SMTHEN] to 0, it disables smoothing function and soc will be same with unfiltered soc. Is this understanding right?

Thanks a lot!

Thanks for your answer above! I have further questions.
1, Is truesoc accurate in storage mode if it can't see 0.2mA leakage? Can trucesoc take capacity loss of chemical characteristic and leakage current into consideration during long term storage? How can you make sure truesoc is equal to real capacity during long term storage? How many accuracy does it have between truesoc and real capacity?
2,Our FG will be SEALED mode in production line. Could you write process about how to rest FG step by step?
3,According to your explanation, soc reading of one 100% cell will still be 100% after one year storage, but real capacity of cell will be 40%. When it is charged again after this one year storage, soc reading will increase form 100%. Is this understanding right?
4,If I disable smoothing soc function, does I need to do learning cycle again?
5,If I disable smoothing function to align soc with truesoc, what disadvantage does FG have? What happen to FG truesoc reading?
6,How does rem cap simulation work?
7,What influence does coulomb counter have for soc and truesoc during storage mode?

8,When I set operation configuration D[SMTHEN] to 0, it disables smoothing function and soc will be same with unfiltered soc. Is this understanding right?

Thanks a lot!