Charge percentage is off

[hill115side]

I have a DNA250C with a Hyperion 2800mah and looks like the charge percentage is off.

I have added an image from the Device Monitor screen for reference.  Has anyone else had this issue and what could I do yo fix it?

[retird]

Not many folks have a 4 cell 250C.   Your cell 3 seems to be out of balance in the screenshot.    You might compare this CSV file to your CSV.  Save your battery CSV file and load this one (attached file) if you want to see if that helps or you can run battery analyzer to create a CSV for that battery pack..  Screenshot of my 4 cell 250C while still charging:

 

4cellcsv.csv

[hill115side]

My CSV file is really close to yours. 

mine.csv

[retird]

I updated my previous post...

[hill115side]

running the analyzer now.

[hill115side]

Also, I have balanced charged my lipo a few weeks back and still the percentage was not 100%.  After the balance charge, all cells where at ~4.2.

[Wayneo]

21 minutes ago, retird said:

Your cell 3 seems to be out of balance in the screenshot

No use running the analyzer now. Over time, leaving your mod charging, it should rebalance, unless you can bring up cell 3 on your own. 

[retird]

So it doesn't balance charge in the device?

[hill115side]

No, it will not balance charge in the device.  The best I get is 70% in the device.

 

[retird]

So even at 70% each cell isn't balanced?

[hill115side]

no, cell 3 will be around 3.9 and others are 4.2.  I would assume that the pack percentage would be higher than 70% at that point. 

 

[hill115side]

Current screen for reference. 

[retird]

The 70% peak may be a CSV file thing but the balance  issue may be a battery internal thing or a charger circuit thing in the device. But you say you can externally charge the battery and it is balanced at 100%.

Screenshot of my 4 cell completely charged in the device.  Shows 99%  charge reading.  My Battery is not the same one as yours.

 

[hill115side]

I will do an external balance charge and then see what the percentage on the DNA is.  Thanks for all your help.

[retird]

OK, please let us know what goes.....

[hill115side]

I will, thanks.

 

[Wayneo]

@hill115sideAFTER your external balance charge do another printscreen like your last one. 

[hill115side]

SUCCESS, the pack is now fully charged and balanced.  After I removed the pack from the mod, it still would not balance charge on the external balance charger.   What I did was discharge the pack to the storage voltage level (3.8) and started a balance charge again, that seems to have done the trick. 

Hope this helps someone else that has a similar issue. 

 

 

Edited August 28, 2019 by hill115side

[retird]

Great you got it sorted out... but it would be good to keep the battery in the device, use it till it gets to the point it needs to be charged,  and charge it within the device to make sure the charging circuit balance charges the battery up to 99% again....... 😉

[hill115side]

The pack has been sitting the mod plugged to the charger, the battery is currently at 98%.

 

Edited August 29, 2019 by hill115side

[Thatguy]

I had the same thing happen on my new boards, I thought it was BC I wasn't running a ground (aluminum case, board is grounded to case) so I added a ground and it didn't help. Then I set the mod settings to the correct 2 18650's and uploaded and it works perfectly.