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    Molicel P42a cycle test

    Hi, thanks for your response. I am trying to figuring out the reason why li-po is prefered to use in multicopters instead of li-ion. By comparing the C rate and energy density, this P42A is a good candidate. Actually, we have build the P42A package (12S6P) for using in my drone but the response...
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    Molicel P42a cycle test

    I am thinking about the voltage response Do you have experience about this aspect, comparing Lion and Lipo? I mean I would love to know how much delay the P42A will take. Can you set up experiement to measure this?
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    Molicel P42a cycle test

    I meant, "battery packing" (combining cells into a 12s6p battery). Could you give me some tips on this "packing" technique (any remarks on the using strips, welding...)
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    Molicel P42a cycle test

    Our company orders huge amount of them, directly from the factory. However, it could be like what you said - not "A" grade. By the way, any tips for packing? Thanks!
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    Molicel P42a cycle test

    that's really helpful. Thanks a lot. In my case, stopping at 36V (for 12s, so 3V for each "s"), the cell could reach up to 77 degreeC, really hot (ambient temp was 25-30degreeC). Still looking for the causes!! I used the cell holders, of course they have the air gap. I used copper but not...
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    Molicel P42a cycle test

    actually, 15Amp at room temperature: 25 to 30 degreeC
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    Molicel P42a cycle test

    Very nice! Could you go with higher current please, from 15A is a great appreciation. Thanks.
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    Molicel P42a cycle test

    You might mean the ambient temperature < 0C? If so, I am sorry that it is impossible for me to do. We just can conduct tests in 25 - 35 degree C. Packing the cells in close spaced keep the temperature rising quickly.
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    Molicel P42a cycle test

    Thanks Frank, I also expect that my system went wrong. To figure it out, I need advices from the you guys. I am willing to share my configuration and your helps are valuable. Moreover, if you have experienced this situation before, it is good to know that the cell itself has problems (at high...
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    Molicel P42a cycle test

    Thanks. I am trying in next few days. However the heat problem is different from the stop discharging problem. As I stated, when I try to go over 4400W (about 16A-20A for each cell), the entire battery will stop discharging for a short moment (1s - 2s) and after that, it recover back. Do you...
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    Molicel P42a cycle test

    Hi, have packed 12S6P. I discharge it around 10 - 12min from full 50.4V down to 36V at 4000W-4400W. I do not have connected to any controller at all. I made myself the current/voltage/power measuring tool for monitoring (I make drones so the power measuring tool works fine and precisely)...
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    Molicel P42a cycle test

    So "cut-off" here is made by you, not the battery itself, am I right? I also discharge high current (12S6P), 110A in total, about 18A for 1 cell. The cell seems to get hot (about 77 degree C) and I have the power lost. For while, nearly 30s to 1 minute, it came back as normal. Is that the...
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    Molicel P42a cycle test

    Hello, I have seen your temperature cut-off test. To my understanding, if the temperature of this P42A reaches the limit, the battery will discharge no more. Following the datasheet, it claimed the battery could work at maximum 60 degree C. The tests that you conducted, the temperature range for...
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