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BQ27441-G1: Jump in SOC reading

Part Number: BQ27441-G1

Hi,

Please find the attached  Graph lower half represents, graph between SOC and time, it has three section, first section we are making some mistake during calibration ie not updating battery capacity all configuration are at default value.  

My first question even though I am not updating capacity and other  2-3  parameters described in  SLUUAP7 ie Quick start guide for BQ27441-G1   my understanding is it should show linear (although reading will not be correct )behaviour of  SOC not sudden jump as shown in graph. Please let me understand the how this  IC predicts SOC and why it is not showing linear behaviour. 

Third section of lower half ie discharging curve showing linear behaviour is obtained after updating 4 parameters described in  SLUUAP7 ie Quick start guide for BQ27441-G1. We observed that still there is jump in SOC ie 3-4% that two happen after some GSM transmission (ie higher current requirment). 

1) Please let me understand why this jump happening?

2) Does  IC take the average of reading? 

3) We are reading SOC every 10  min and transmitting data over cloud after every 1 hour. It takes 2-3 reading to come back again at previous reading. so   I  am assuming sudden burst current should not disturb 2-3 reading ie reading for 30 min.