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[Solved] Dell XCMRD BQ30423 cells voltage differece is not match with actual cell voltage

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Habib Ullah
(@sajid)
Reputable Member Customer
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Dear sir during resetting from BQEVSW everything was fine, when 3C normal cmd applied to unlock the chip after this BMS not presenting actual voltages as it receive from cells, eventhough pack voltages are correct 9944mV in dashboard.

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Topic starter Posted : 29/10/2023 2:00 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

 Read the battery with Test Demo software and check cells voltages on different channels 

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Posted : 29/10/2023 2:09 pm
Habib Ullah
(@sajid)
Reputable Member Customer

@djibattworkshop same result

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Topic starter Posted : 30/10/2023 2:14 am
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

Reflash with initial backup eeprom. 

 

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Posted : 30/10/2023 8:57 am
Habib Ullah
(@sajid)
Reputable Member Customer

@djibattworkshop it is not going to reset tab

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Topic starter Posted : 30/10/2023 10:59 am
DjiBattWorkshop
(@djibattworkshop)
Member Moderator
Posted by: @sajid

Dear sir during resetting from BQEVSW everything was fine,

You have used bqEVSW instead of NLBA1 to reset the chip ?.. 

 

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Posted : 30/10/2023 11:31 am
Habib Ullah
(@sajid)
Reputable Member Customer

@djibattworkshop yes 

 
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Topic starter Posted : 30/10/2023 12:58 pm
Habib Ullah
(@sajid)
Reputable Member Customer

now it is not accepting unlock cmd

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Topic starter Posted : 30/10/2023 12:59 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

 bq30423 is supported by NLBA1 software. Just press Unseal button and thats it. Any reason to use bqEVSW to unseal it ?.. 

 

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Posted : 30/10/2023 1:15 pm
Habib Ullah
(@sajid)
Reputable Member Customer

@djibattworkshop I have done 1st unseal from NLBA1 but due to updation of EEPROM redesigning capacity for new cells .etc I have used the bqevsw I made a mistake to run unseal cmd (6789-6789 to 3C) from bqevsw but result is not right as normally other chips works. 

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Topic starter Posted : 30/10/2023 1:26 pm
Habib Ullah
(@sajid)
Reputable Member Customer

@djibattworkshop I have observed that NLBA1 is very good in unsealing and reseting the FCC .etc but it could not update the individual cell capacity in EEPROM also some time we have to re-enter charging current manually through BQEVSW

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Topic starter Posted : 30/10/2023 1:31 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

 If you want to see any new features in the NLBA1 feel free to offer your suggestions in the Feature Request subforum. 

Posted by: @sajid

I have used the bqevsw I made a mistake to run unseal cmd (6789-6789 to 3C) from bqevsw but result is not right as normally

 it could not be the reason of the issue which is described in the topic 

 It looks like chip eeprom was not correctly edited or chip was reflashed with dump from different battery. 

 

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Posted : 30/10/2023 1:41 pm
Habib Ullah
(@sajid)
Reputable Member Customer

@djibattworkshop

Posted by: @djibattworkshop

chip eeprom was not correctly edited

May be I have made a mistake

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Topic starter Posted : 30/10/2023 1:46 pm
Habib Ullah
(@sajid)
Reputable Member Customer
Posted by: @djibattworkshop

chip was reflashed with dump from different battery

I already know the cons of wrong flash so did not do this

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Topic starter Posted : 30/10/2023 1:47 pm
Habib Ullah
(@sajid)
Reputable Member Customer

@djibattworkshop Is there any solution to this problem? Problems are always raised for learners, so this is a good thing we are learning from good teachers. 

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Topic starter Posted : 30/10/2023 1:50 pm
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