Battery Electric - Lithium Choices

Discussion in 'Projects & Proposals' started by Guest625101138, Sep 28, 2009.

  1. Guest625101138

    Guest625101138 Previous Member

    I thought it time to start collecting information on lithium batteries in one location as there are quite a few battery electric projects under way.

    It would be nice to have a point of reference for this emerging technology.

    I have started to dabble with lithium. My first purchase was a 5Ah 22V LiPo. It is scary power for 715g. I purchased a charger that can be selected for a range of batteries. The cells go to 4.1V on charge.

    My latest Ryobi battery power tool has a lithium battery. It does a nice job but very early days.

    I am particularly interested in large format batteries. There are some here:
    http://lithiumenergy.jp/en/products/index.html
    I saw these close up at a car show. I do not think you can buy them yet.

    Someone pointed this lot out:
    http://www.valence.com/?q=products/battery_modules/u-charge_xp/specifications

    OK - who has lithium batteries and how are they performing?

    Rick W
     
  2. Submarine Tom

    Submarine Tom Previous Member

    5Ah 22v from a 715 kg LiPo battery?

    You got ripped off man!

    That IS scary.
     
    1 person likes this.
  3. Guest625101138

    Guest625101138 Previous Member

    Thanks Tom. I have corrected the original.

    Rick
     
  4. cameron.d.mm
    Joined: Mar 2009
    Posts: 68
    Likes: 1, Points: 8, Legacy Rep: 14
    Location: Ontario, Canada

    cameron.d.mm Junior Member

  5. Guest625101138

    Guest625101138 Previous Member

    Cameron
    Have you any first hand experience with lithium batteries or do you know anyone one using recent Thundersky batteries?

    Rick
     
  6. sigurd
    Joined: Jun 2004
    Posts: 827
    Likes: 8, Points: 18, Legacy Rep: 65
    Location: norway

    sigurd Pompuous Pangolin

    So what does the saphion cost ? And are the Altairnano available to consumers?

    edit - Cameron, looks like a nice offering. i added it to this here spreadsheet in excel 5.0 format that i made. feel free to modify etc.
     

    Attached Files:

  7. marshmat
    Joined: Apr 2005
    Posts: 4,127
    Likes: 149, Points: 63, Legacy Rep: 2043
    Location: Ontario

    marshmat Senior Member

    We used Saehan Enertech lithium polymer cells in the last solar car I worked on..... depending on conditions and discharge profile, we were getting from 4 to 5 kWh out of a pack that weighed about 30 kg including controller. Great little cells, if a tad finicky. A couple of cars before that, we had a Molicel Li-ion pack made by E-One Moli Energy; I think that pack is in storage now and about 10-12 years old but was still strong enough to run a car when we checked it a couple of years ago.
     
    1 person likes this.
  8. Guest625101138

    Guest625101138 Previous Member

  9. DGreenwood
    Joined: Aug 2004
    Posts: 722
    Likes: 40, Points: 28, Legacy Rep: 507
    Location: New York

    DGreenwood Senior Member

  10. jmolan
    Joined: Dec 2008
    Posts: 66
    Likes: 2, Points: 8, Legacy Rep: 65
    Location: Mexico/Oregon/Alaska

    jmolan Junior Member

  11. cameron.d.mm
    Joined: Mar 2009
    Posts: 68
    Likes: 1, Points: 8, Legacy Rep: 14
    Location: Ontario, Canada

    cameron.d.mm Junior Member

    Rick Willoughby,

    No, I haven't used them myself (my car will be a lead sled when I get it done) but a lot of people have used them. I'm not so sure on the recent TS batteries, but I know that some horror stories circulated about the older ones.

    There are a fair number of people at www.diyelectriccar.com who have gone the lithium route. I think there are some Australians too. Check the 'garage' section of the site and you might find some local owners. Generally people there seem happy to answer questions and share experiences.
     
  12. Guest625101138

    Guest625101138 Previous Member

  13. Guest625101138

    Guest625101138 Previous Member

  14. BertKu
    Joined: May 2009
    Posts: 2,521
    Likes: 47, Points: 58, Legacy Rep: 223
    Location: South Africa Little Brak River

    BertKu Senior Member

    What will be the correct way to connect LifePO4 batteries parallel?. I assume with diodes to protect the one battery from discharging/charging other packs. But maybe also with Power MosFets.

    My apology Rick, I may have been converted to the LiFePO4 concept. I may have gone overboard with the NiMH batteries. Tonight I will show the multiple NiMH pack I am building on the other thread.

    Bert
     

  15. Guest625101138

    Guest625101138 Previous Member

Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.