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Lenovo 00HW002 chip 045A20 LGC charging issue in calibration

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FJ
 FJ
(@brs)
Noble Member Customer
image

left the battery in last state after stopping charging manually. then tried to charge but current is not increasing. rather injected capacity is decreased -1mah due to little discharge current of LED.

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Topic starter Posted : 09/06/2024 3:14 pm
FJ
 FJ
(@brs)
Noble Member Customer

but after a little discharge at this point, charging will complete without any issue.

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Topic starter Posted : 09/06/2024 3:16 pm
FJ
 FJ
(@brs)
Noble Member Customer
image
image

charging continues with no unbalance after this.

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Topic starter Posted : 09/06/2024 3:46 pm
FJ
 FJ
(@brs)
Noble Member Customer
image
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Topic starter Posted : 09/06/2024 4:08 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator
Posted by: @brs

could you find this imbalance in charge log as well?

 No. But it was detected on Calibration tab and Charge snapshots. 

 

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Posted : 09/06/2024 7:07 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator
Posted by: @brs

how the software calculates this imbalance which is not recorded in log

 The only software developer could tell this exactly. 

 

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Posted : 09/06/2024 7:09 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator
Posted by: @brs

charging continues with no unbalance after this

 So now charge is Ok ?.. 

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Posted : 09/06/2024 7:10 pm
FJ
 FJ
(@brs)
Noble Member Customer
Posted by: @djibattworkshop

No. But it was detected on Calibration tab and Charge snapshots.

charge/calibration logs are from same screenshots process. it should reflect in logs as well

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Topic starter Posted : 10/06/2024 11:26 am
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

 Yes. But they are too long to inspect visually every cells voltage value. Probably its logged somewhere. Me just checked the moments where charge was stopped. Ans such a big unbalance was not found. On Cells Check tab its also not detected. 

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Posted : 10/06/2024 11:31 am
FJ
 FJ
(@brs)
Noble Member Customer
Posted by: @djibattworkshop

So now charge is Ok ?.

every time in charging, when soc reaches at around 70% or 80% charging current drops to -12mv and stays constant.

after stopping charge manually, if charging is started again even after much delay, current remains -12mv.

at this point, AFTER A LITTLE DISCHARGE, if charging is started then charging completes 100% without any issue.

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Topic starter Posted : 10/06/2024 11:37 am
FJ
 FJ
(@brs)
Noble Member Customer
Posted by: @djibattworkshop

But they are too long to inspect visually every cells voltage value. Probably its logged somewhere.

i tried to find in the log from start to end, but could not find.

in an other battery's calibration, i noted that software was showing imbalance of 65mv while discharging but when i looked on cells voltages, difference was above 130mv between 2 cells. didn't took screenshot for reference.

can there be some error in software?

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Topic starter Posted : 10/06/2024 11:46 am
DjiBattWorkshop
(@djibattworkshop)
Member Moderator
Posted by: @brs

imbalance of 65mv while discharging but when i looked on cells voltages, difference was above 130mv between 2 cells. didn't took screenshot for reference.

can there be some error in software?

 Software does not track unbalance in low voltage range. No idea why. 

 It was even created Feature Request topic to extend unbalance monitoring range. Otherwise it looks like unbalance obfuscation so poor batteries looks like good. 

https://www.laptopu.ro/community/features-request-for-nlba/extending-unbalance-monitoring-range/  

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Posted : 10/06/2024 12:28 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator
Posted by: @brs

every time in charging, when soc reaches at around 70% or 80% charging current drops to -12mv and stays constant

 Try to charge the battery from BatInfo tab. Check if same issue could be observed there. 

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Posted : 10/06/2024 12:35 pm
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