Acer BQ20Z955 reset

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Acer BQ20Z955 reset

Postby Batterycomp » Thu Nov 24, 2016 9:24 am

Hi
I have a Acer battery based on BQ20Z955 chip....I have changed cells then I want to reset the chip with your software. I can read battery status, manufacturer status also the dump is ok (D led light) but when i enter calibration parameters and press "Save this parameters..." button, the software say "Not supported firmware".

Battery status:
DesignCapacity: 4400 mAh
FullChargeCapacity: 1156 mAh
CycleCount: 0
Date: 2010.08.23 yyyy.mm.dd
DesignVoltage: 11100 mV
ManufName: SMP-SDI22
DeviceName: AS10D75
SerialNumber: 2C6C
ChargingCurrent: 3520 mA
ChargingVoltage: 12600 mV
DeviceChemistry: LION
Temperature: 19.3 C
Voltage: 12259 mV
Current: 0 mA
RelativeSOC: 100%
AbsoluteSOC: 27%
RemainingCapacity: 1156 mAh
VCELL4: 0000 mV
VCELL3: 4087 mV
VCELL2: 4088 mV
VCELL1: 4085 mV
SpecificationInfo: 0031 Hex
Battery Status:
INIT|DSG|


Manufacturer status:
MaxError: 1%
Operation Status:
PRES|LDMD|DSG|VOK|QEN|
Safety Status: OK
PFStatus: OK
Charging Status:
RSVD10|
FETControl: 0006
Update Status: 6
Qmax Cell0: 3695
Qmax Cell1: 3690
Qmax Cell2: 3736
Qmax Cell3: 4400
Qmax Pack : 3690
Cell0 R_a flag : 0055
Cell1 R_a flag : 0055
Cell2 R_a flag : 0055
Cell3 R_a flag : FF55
Device Type: 0955
Firmware Version: 1.02
Hardware Version: A6
Manufacturer Status:
RSVD10|ST0|
Chemistry ID: 0227

What can I do to reset it?
Batterycomp
 
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Re: Acer BQ20Z955 reset

Postby Batterycomp » Thu Nov 24, 2016 3:56 pm

I try to charge the battery but charging stops at 35% with a COV error in Safety status....I believe it's because the Qmax Cell values are no reseted....So one cell is charging more quickly than others...
How can I reset the qmax cell values to default (4400)?
Batterycomp
 
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Re: Acer BQ20Z955 reset

Postby Batterycomp » Fri Nov 25, 2016 10:52 am

Hi admin...Can you help me with this?
Batterycomp
 
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Re: Acer BQ20Z955 reset

Postby admin » Sat Dec 03, 2016 12:31 am

COV means CellsOverVoltage.
You have cells imbalanse during charging process.
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Re: Acer BQ20Z955 reset

Postby Batterycomp » Mon Dec 19, 2016 10:08 am

Hi
The battery is still with me...And have the same problem...The cells were new but for whatever reason one cell is charging/disgharging faster than the 2 other....
How can I balance the cells?
Can you explain the procedure?
Batterycomp
 
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Re: Acer BQ20Z955 reset

Postby admin » Mon Dec 19, 2016 10:49 am

Your cells are bad.
They have different impedance.
That's why one of them is charging and discharging faster then the others.
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Re: Acer BQ20Z955 reset

Postby Batterycomp » Mon Dec 19, 2016 11:01 am

But they are new...And a use the same cells in other batteries and work well....Never happened until now to find a new bad cell.
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Re: Acer BQ20Z955 reset

Postby admin » Mon Dec 19, 2016 11:13 am

You have battery analyzer and can test you cells.
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Re: Acer BQ20Z955 reset

Postby Batterycomp » Mon Dec 19, 2016 2:03 pm

Yes , I have battery analyzer and , strange enough, that cell pair look bad....I will replace the 2 cells with other new ones and try again.

Rgds
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