BQ2084 Questions

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BQ2084 Questions

Postby TN-Notebooks » Thu May 18, 2017 10:36 am

Hallo

i have a Pack with a BQ2084DTM v1.40

All cells have been replaced with new ones
Old Types 9 EA Samsung IRC18650-22FU
New Cells 9 EA Samsung IRC18650-26JM

on calibration Page i changed the Values from 6600 mAh to 7800 mAh
Spec Info is at 0021

by saving there is a Error Displayed
Error at Address 0076 --- Calibration ok

I discharged the Pack and charged with external Power Source to 12,6 V End Voltage
I discharge with Load to 3,00 Volt and charge again external
BQ2084DTM Firmware 1.40 - Max Error 2 %

Cell Impedance
Cell 1 at 35 mOhm
Cell 2 at 23 mOhm
Cell 3 at 26 mOhm

Is there something else i have to do ?
due to different Cells ( change fro 2200 to 2800 ) is the Spec Info ok or do have to change something ?

What is the Error at 0076 ?
Defect Chip ?
Can i use every Firmware version of new Chip if the Chip have to replaced ? V133 -V140 - V143

Charge Current is calibrated to 4000
if i charge the Pack : somewhere over 90 % the setting change to 300 and at 100 % the setting change to 0
If i discharge vice versa
Is this normal ?


Thanks for help
Last edited by TN-Notebooks on Thu May 18, 2017 6:42 pm, edited 1 time in total.
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Re: BW2084 Questions

Postby admin » Thu May 18, 2017 4:41 pm

by saving there is a Error Displayed
Error at Address 0076

This means the sowhware didn't manage to wite to address 76h.
You had press OK at message window and then press Write button again.
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Re: BQ2084 Questions

Postby TN-Notebooks » Thu May 18, 2017 6:45 pm

Hallo

if i press write Button again same Error.
Batterie Pack disconnected , Computer rebooted
Same Error everytime
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Re: BQ2084 Questions

Postby admin » Thu May 18, 2017 7:43 pm

What version do you use and what adapter?
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Re: BQ2084 Questions

Postby TN-Notebooks » Sun Jun 18, 2017 9:44 am

Hallo

I used the 4.39
i use now the 4.40 Version with a TI GPIO USB Adapter and same Behavior
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Re: BQ2084 Questions

Postby admin » Sun Jun 18, 2017 11:47 am

It looks like flash is phisically damadged at address 76h and software can't write to it.
But probably it's not critical and battery can normally work.
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Re: BQ2084 Questions

Postby TN-Notebooks » Sun Jun 18, 2017 11:59 am

Hallo,

no seem to be a other Problem because 4 Akkus are affected exactly with same Message and same Adress
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Re: BQ2084 Questions

Postby admin » Sun Jun 18, 2017 12:16 pm

But if reset is made then it must be OK.
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