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EDIT FCC BQ8050 FOR DELL V79Y0

brahimsami1982
(@brahimsami1982)
Trusted Member Customer

Hello freind.

I have this dell battery for XPS 14Z with bq8050 IC

it has imbalance in two pair cell.

after precharge it and reset it i observe that the full charge capacity can',t be changed

i try to correct It by calibration but the charging process stop in 44%

Can you help me to solve it.

DELL XPS14 2
DELL XPS14
DELL XPS14 3

 

Quote
Topic starter Posted : 20/09/2021 5:02 am
Nicusor
(@azzido)
Member Admin

Go to Reset Tab and increase the FCC value until you obtain desired value.

Why do you want to increase the FCC for such a bad cells ? It is useless, the FCC should reflect the actual capacity of the cells. It will be modified by the chip after each cycle.

I see that in the Calibration tab the Charging did not stop at SoC=44%. I still see positive charging current. Looking at the voltage, the pack has 16283mV, this means that a cell has over 4000mV which is for sure not the equivalent of SoC=44%. So, your battery reports the SoC incorrectly. In this case Check both options Ignore SoC in the Calibration tab and let it do a full cycle. It is known that some Sanyo firmware have a very slow charging process near the full voltage.

NLBA Laptop Battery Analyzer with Chip Reset & Repair Option

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Posted : 20/09/2021 5:48 am
DjiBattWorkshop
(@djibattworkshop)
Member Moderator
Posted by: @azzido

Looking at the voltage, the pack has 16283mV, this means that a cell has over 4000mV which is for sure not the equivalent of SoC=44%. So, your battery reports the SoC incorrectly

This is because chip reset was done before. Sanyo firmwares drop RSoC to 0% after soft reset. Then it calculates it from the scratch using coulumb-counter and passed charge untill FC bit is set. As soon as tamper conditions is reached it adjust RSoC to 100%. But this battery has imbalance around 60mV which could prevent to reach Full Charge. Anyway customer even did not wait this event as there is small Charging Current in progress.

 

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Posted : 20/09/2021 11:18 am
DjiBattWorkshop
(@djibattworkshop)
Member Moderator
Posted by: @brahimsami1982

after precharge it and reset

Why did you reset cycle counter and manufacture date on battery with old cells?

What do you want to achieve?

 

ReplyQuote
Posted : 20/09/2021 11:20 am
batFix
(@batfix)
Reputable Member

I would guess - make a fake healthy battery to full someone.

Lets Make NLBA Great ! Together.

ReplyQuote
Posted : 20/09/2021 1:14 pm
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