Recent content by DanJohnson

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    Grad Student Looking for Research in used Lithium 18650 Cells

    Looks like @Paddy72 deleted his comment, If you'd still be willing to share your info about your friends research I'd be happy to help collaborate. I'm very close to a working prototype and in the interest of opensource community resources I may be able to provide helpful information to them in...
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    What is the average impedance of new 18650 cells?

    Additionally would these base impedance levels differ across chemistries of L-ION cells?
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    What is the average impedance of new 18650 cells?

    I’ve found manufacturers specs that say new cells shouldn’t exceed anything from 70-100 mΩ but that doesn’t tell me what the average impedance would be for new cells. Obviously it’s not going to be 0 but I’d just like to know what y’all expect impedance of new cells to be to give me a better...
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    Grad Student Looking for Research in used Lithium 18650 Cells

    Thank you everyone who contributed! I learned a lot from the links and resources you all connected me to. Wolf, big thanks to you too, your data excel sheet has been extremely valuable in helping me design my idea and I'm working on a prototype for could potentially increase the speed of your...
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    Grad Student Looking for Research in used Lithium 18650 Cells

    Hello, I'm a first semester graduate student in the USA and I have recently gotten super interested in Lithium Batteries! I have a ton of used 18650 cell's I've harvested from all sorts of products and while I was building an E-bike battery last year I was beating my head against the wall trying...
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