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Cell Gap High After Flights

Discussion in 'Electronics' started by Zach Beggs, Aug 20, 2013.

  1. Zach Beggs

    Zach Beggs Member

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    Some lipos will come back from the field with a high cell gap. Sometimes .030, one was .050 (QC8000s).

    As for my QC1200s, one of them is at a 0.123 of a cell gap from the field.

    They seem to charge fine as they return to normal ranges upon full charge. But just curious as I don't have as much experience with lipos as some of you guys do.

    Any advice would be helpful!

    I also have been paracharging, but there has been no issue there (minimal cell gap on full charge).
     
  2. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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    I may reveal my ignorance here, but I don't even bother checking the cell gap. I let the Hyperion charger worry about that.
    That said, I am not paracharging.

    Andy
     
  3. Gary Haynes

    Gary Haynes Administrator
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    Zach I don't check mine after flight. Did that one time and they vary widely but balance with little to no gap.
     
  4. Steve Maller

    Steve Maller UAV Grief Counselor

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    I've checked periodically, although I don't make a standard practice of it. What I find is that my main 4S flight batteries (Zippys and Quadropowers) tend to stay pretty close, with the cells reading (for example) 3.78 3.81 3.80 3.76 which I consider fine. Where I've seen the greater variation is in the little 1200 and 1600 3S LiPos I use for the camera stuff, where I end up with numbers like 3.61 3.80 3.72 but even that seems OK. They charge up to 4.2 4.19 4.21 or something like that, so I don't worry. I'm paracharging the 4S batts but not the 3S. I charge all my batteries at 1.5-2C
     

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