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Thread: What are my options for new batteries in 2019 ?

              
   
   
  1. #1
    Senior Member Hugues's Avatar
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    What are my options for new batteries in 2019 ?

    Hi guys,

    Been a while since my last visit/post.

    I'm still very happy with my build (pics here: https://www.facebook.com/zvexx.motorbike/).

    I'm running on 26 Leaf cells, first gen bought in September 2014, they were supposed to be new. Been riding since spring 2015 with them, never had any problems. The 26 cells are paired by 2, then the 13 pairs are in series. I can pull 600 amps peak without too much strain.

    Now, after 4 years, my range has reduced somehow, not catastrophic, but there are days I would like to ride longer and pull hard on pack.

    So I'm thinking about installing new batteries next winter, starting in October.

    What are my options in 2019 ?

    I attach a picture showing how my pack is built, with dimensions.
    Current Leaf pack.jpg

    The least amount of work for me would be to buy new Leaf cells and just swap them. I saw some here (and they seem to ship abroad, I live in Switzerland):
    https://greentecauto.com/hybrid-batt...ry-module-7-6v

    But if these are not new, i might end up with not so much more range than currently.

    I would be ready to redesign the pack if i could get a significant increase in range (and not loose on peak power, i need to pull 600 amps for a second or two).

    Would this Tesla module make any sense ?:
    https://greentecauto.com/hybrid-batt...-battery-cells

    At 25 V, I would need 4 to reach my current voltage of around 100 volts. That would be 21 kWh, that would be awesome, compared to my 13kWh when my Leaf pack was new. They don't rate max Amps of that module, I guess they can handle 600 amps for a second or two ?

    Any other options ?
    Last edited by Hugues; 3 Weeks Ago at 0622.
    Regards from Switzerland
    My 2.5 Upgrade Thread

  2. #2
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    Hughes,

    I would definitely not buy any Gen 1 modules. I have seven Gen 2?-Gen 3? modules from a 2015 Leaf in my cargo bike. They had low mileage on them when I got them in July of 2015. I pulled 53 Ah, out of them on my first long ride in August that year. After 22233 miles, and 7728 Ah total, I was able to pull 42 Ah out of them on a ride this week. The first two years I never thought twice doing 150 mile rides. Now I have to watch my fooling around to make 125 miles.

    http://www.evalbum.com/5173

    I will probably hold out for another year, at least. I hope to get some of the NMC cells from the new 62 kWh Leaf. They appear to be about same physical size, but packed as individual cells.

    https://cdn.motor1.com/images/mgl/PY...tery-video.jpg

  3. #3
    Senior Member Hugues's Avatar
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    Thanks Warren, these new Leaf cells could be an option. Any specs somewhere so we can see energy and power density versus Leaf Gen 1 ? I like the way they built them.
    Regards from Switzerland
    My 2.5 Upgrade Thread

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    Not much info yet. They have apparently started selling them in Europe already. None in the US yet. There are 288 cells, 96s,3p. I suspect the 3 parallel cells may be welded together at the tabs.

    https://insideevs.com/news/342009/he...battery-video/

  5. #5
    Senior Member Hugues's Avatar
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    well good to read that the pack energy is higher but the size is mostly the same.
    Looking forward to seeing them on the market.
    thanks
    Regards from Switzerland
    My 2.5 Upgrade Thread

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    Senior Member Stevo's Avatar
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    What are your plans for the tired pack? I was thinking of playing with some solar panels to try and build a portable solar charger with my old leaf cells. They still have some useful life left in them. I hate to waste them for recycling just yet.
    Current rides: '96 Honda Ohlins VFR, '03 Cannondale C440R, '03 Cannondale Cannibal, '06 Yamaha 450 Wolverine 4x4
    Current builds: WORX.VOR.v3.2

  7. #7
    Senior Member Hugues's Avatar
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    Quote Originally Posted by Stevo View Post
    What are your plans for the tired pack? I was thinking of playing with some solar panels to try and build a portable solar charger with my old leaf cells. They still have some useful life left in them. I hate to waste them for recycling just yet.
    I would surely try to sell them and post here in the forum.
    Regards from Switzerland
    My 2.5 Upgrade Thread

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