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Thread: My new LiFePO4 pack

  1. #1
    Membership #: 84 Free member Award Moderator G0DZB's Avatar
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    My new LiFePO4 pack

    I've been building a LiFePO4 pack using 4 of these 15Ah cells from http://eclipsebikes.com/headway-life...ah-p-1053.html
    The "raw cells" had their first outing a few days ago
    My new LiFePO4 pack-lifepo4-kxpa-png
    But now they are in a nice box complete with LCD Voltage/Current/Power and Energy display
    My new LiFePO4 pack-lifepo4working-png
    Best 73 tu
    Peter G0DZB

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    Membership #: 46 Full Member WD5IKX's Avatar
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    Re: My new LiFePO4 pack

    Very interesting Peter. How much does this battery pack weigh?

    John WD5IKX
    Texas, USA

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    Membership #: 84 Free member Award Moderator G0DZB's Avatar
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    Re: My new LiFePO4 pack

    I haven't weighed it, but the specs on the page I linked to give 480g for each cell.
    Best 73 tu
    Peter G0DZB

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    Membership #: 381 Free member G1YBB's Avatar
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    Re: My new LiFePO4 pack

    that's a very cool and neat build. Did you 3D print the orange end pieces?
    I take it that's a linear it's powering? Does that come with powerpole DC connectors or did you modify it?
    Steve G1YBB
    http://g1ybb.uk

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    Re: My new LiFePO4 pack

    Quote Originally Posted by G1YBB View Post
    that's a very cool and neat build. Did you 3D print the orange end pieces?
    No, I bought them with the batteries. The mounting is not ideal and I'm half expecting the epoxy that holds the cells in place to eventually give way. If it does, then I'll investigate some 3D printed parts if I can find someone to make them for me.
    I take it that's a linear it's powering? Does that come with powerpole DC connectors or did you modify it?
    It is an Elecraft KXPA-100 and it has two powerpole "sockets" on the back. One to connect to power supply, and one to provide power to a KX3.
    Due to the way powerpoles stack together I had to use a "non-standard" layout on the battery box to be able to mount sockets for KXPA,KX3 and PX3.
    I hope to get out /P later today and give the battery another cycle :-)
    Best 73 tu
    Peter G0DZB

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    Membership #: 381 Free member G1YBB's Avatar
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    Re: My new LiFePO4 pack

    Quote Originally Posted by G0DZB View Post
    No, I bought them with the batteries. The mounting is not ideal and I'm half expecting the epoxy that holds the cells in place to eventually give way. If it does, then I'll investigate some 3D printed parts if I can find someone to make them for me.

    It is an Elecraft KXPA-100 and it has two powerpole "sockets" on the back. One to connect to power supply, and one to provide power to a KX3.
    Due to the way powerpoles stack together I had to use a "non-standard" layout on the battery box to be able to mount sockets for KXPA,KX3 and PX3.
    I hope to get out /P later today and give the battery another cycle :-)
    That's a cool looking linear!
    Good luck today, my conditions widget isn't looking too promising!
    Steve G1YBB
    http://g1ybb.uk

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    Re: My new LiFePO4 pack

    I'm not intending to put up anything "big" today, just to operate from the car with these http://www.peteronion.org.uk/G0DZB/MagMount.html.
    Best 73 tu
    Peter G0DZB

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    Re: My new LiFePO4 pack

    Quote Originally Posted by G0DZB View Post
    I'm not intending to put up anything "big" today, just to operate from the car with these http://www.peteronion.org.uk/G0DZB/MagMount.html.
    That's interesting work. Before I 'stepped up' to becoming a radio amateur I did similar experiment builds with ¼w verticals for 27FM. In the end I went for a straight unloaded vertical using a fishing rod araldited into a 3/8 mount (I seem to remember someone making me one to my request and chrome plating it but I may be remembering incorrectly) and then taking the outer jacket off a length of RG213, scrunching up the braid, removing the centre then smoothing/stretching it out over the fishing rod and finally an outer jacket of heatshrink. Worked pretty good! I also used it moving mobile, atop my mini 1000
    Steve G1YBB
    http://g1ybb.uk

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