Reading error

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Reading error

Postby pitox » Thu May 21, 2020 1:28 pm

Hello,
I have many laptop batteries that come for warranty and what i find is that the controller reports 1 cell as having 0 voltage.
I open up the battery and all cell have the same or very close voltage.
Customers report that the battery discharge fast.
Is there anything that can be done to this batteries to reset the controllers so that they can "see" the cell that is reported with 0v, but in fact it is charged?
pitox
 
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Re: Reading error

Postby skeleton » Thu May 21, 2020 8:18 pm

Discharge one of these batteries from 100% to 0% with the analyzer and paste result here so we can see what is the problem. Can be bad connection from the cells to the PCB.
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Re: Reading error

Postby pitox » Fri May 22, 2020 9:37 am

I have attached pictures. These are unopened batteries.
Attachments
BATTERY1-2.PNG
Acer AS10D51
BATTERY1-2.PNG (109.29 KiB) Viewed 1044 times
battery2.PNG
Asus K72 Battery
battery2.PNG (182.41 KiB) Viewed 1044 times
battery1.PNG
Acer AS10D51
battery1.PNG (188.57 KiB) Viewed 1044 times
pitox
 
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Re: Reading error

Postby skeleton » Fri May 22, 2020 1:31 pm

Cell 4 voltage is 0 because there is NO cell 4! Its completely normal. The battery configuration is 3 cells in series + 2 cells in paralel. If you had a 4 cell battery then you will see the voltage of cell 4. The battery is draining fast because the cells are old and worn out, so they need to be replaced and also the chip to be reset.
Last edited by skeleton on Thu Jun 11, 2020 10:50 pm, edited 1 time in total.
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Re: Reading error

Postby pitox » Fri May 22, 2020 2:40 pm

This is logical. Sorry for being a noob.
But the reported full charge capacity is close to the designed capacity.
Can this be reported wrong by the chip?
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Re: Reading error

Postby pitox » Fri May 22, 2020 2:45 pm

I have discharged these batteries with 2 24V car lighbulbs in series that were drawing 1700-1800mA.
It took both batteries 120-130 minutes to get to 0% charge.
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Re: Reading error

Postby pitox » Fri May 22, 2020 2:50 pm

This battery has lasted 150 minutes discharging at 1700mA.
Would you consider this battery used?
Attachments
battery2-2.PNG
battery2-2.PNG (18.91 KiB) Viewed 1033 times
pitox
 
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Re: Reading error

Postby skeleton » Fri May 22, 2020 7:07 pm

In order to properly diagnose the battery you have to monitor the cells discharge curve from 100% to 0% like i told you before.EACH INDIVIDUAL CELL GROUP VOLTAGE. The software that you use doesnt give enough info.Use the BE2WORKS analyzer discharge to from full to 3.0v and paste the full report here! Then we will see what is the problem. And yes the FCC can be reported wrong by the chip.
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Re: Reading error

Postby pitox » Wed May 27, 2020 12:59 pm

Hi. I have tried running the analyzer, but i get this:

Ready.
Waiting for load.
You have 0 seconds to connect.
No load detected.
Measurement terminated.

What should i do?
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Re: Reading error

Postby admin » Wed May 27, 2020 5:47 pm

You should connect load while counting.
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