bq8030 only DSG flag

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bq8030 only DSG flag

Postby boss87 » Tue Mar 14, 2017 5:03 pm

Hi,
I replaced cells, reset the chip, everything works fine.
I discharged battery, and I cant charge it.

Fuse is ok, when I dischargnig battery witch current >300mA I can see the charge fet is turning on. But it is off when charger is connected.

What I am doing wrong ? Maybe there is some PF flag ?
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Re: bq8030 only DSG flag

Postby boss87 » Wed Mar 22, 2017 8:24 pm

Hi Guys,
any advices how to handle with it ?

flags FD and DSG are active, that is strange...
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Re: bq8030 only DSG flag

Postby admin » Wed Mar 22, 2017 9:27 pm

<flags FD and DSG are active, that is strange.>
DSG flag always appear when battery is not charging.
Even if load is not connected.
Because there is always self discharge carrent is running.

When you reset BQ8030 PF flags are cleared.
If it appear again then it's a battery hardware problem or most likely cells imbalance is too high.
Also check if temperature is correct.
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Re: bq8030 only DSG flag

Postby boss87 » Sat Apr 01, 2017 10:37 am

Cells are balanced +-5mV, temperature reading is ok, ~25*C.
Cell Voltage is circa 4.0V, discharging them to 3.0V may help ?
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Re: bq8030 only DSG flag

Postby admin » Sat Apr 01, 2017 10:59 pm

Discharge your battey with battery analyzer and show the result.
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Re: bq8030 only DSG flag

Postby boss87 » Sun Apr 02, 2017 7:53 am

But CHG fet and DSG fet are not open, i can do this by connecting to cells directly
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Re: bq8030 only DSG flag

Postby admin » Sun Apr 02, 2017 8:02 am

You must do this by connecting to battery terminals.
If you made reset but FETs are not open then check if you need connect pin SYS_PRES to GND.
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