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Thread: Stacking chargers (Just in case you wanted to know.)

              
   
   
  1. #1
    Old EV Racer EVcycle's Avatar
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    Stacking chargers (Just in case you wanted to know.)

    Yes Dorthy you can mix and match chargers if you do it right (This may have been discussed already), Here is my setup.

    In the photo you will see 3 chargers Juicing up our Legend dragcar. I use a similar, but different, setup on my Drag bike (more on that later)

    20200922_140432.jpg

    There are three chargers, one 100.8V 8A charger. It is a smart charger, but with no reverse protection. I know it this as I had a millisecond short and the second 100.8 V 8A one that was on the board toasted itself even with proper fusing.

    The other two (stacked) ones are 50.4 4A really smart chargers I got cheap while I wait on some more 8A ones to arrive from China.

    They are charging the same battery pack. (6P2S 100V 1350A) Chevy Volt packs

    The two smaller chargers are in series to give me 100.8 at 4A and are connected via a 10 foot cord to the front of the battery pack.

    The 8A charger is on a 15 foot cord and connected at the other end of the pack. There is enough resistance in the cords and batteries that the changers do not fight each
    thinking there is a full charge until there really is one.

    On the dragbike I have a 50.4V 12A and a 67.2v 12A charger (2 Chevy Volt Packs) The packs are split with a contactor in between them so that each battery has it own charger.

    It all works great. Recharge times at the track are from 20 to 45 minutes depending on if we are at a 1/8 or 1/4 mile event.

    Enjoy!

    Ed
    EV Ed
    Never let being a responsible adult get in the way of passion and curiosity.
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  2. #2
    Senior Member Stevo's Avatar
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    Are you going to add your own reverse protection? I used a solar panel diode between my 2 Mean Wells. I had one on both power supply's + outputs and probably not necessary as these MeanWells have reverse protection built into them. One of the diodes fried on the + to battery pack output after months of charges. They are rated for 50 amp. I havent had any more issues for months of charging now.
    I was wondering how others are charging their packs. Thanks for sharing.
    Current rides: '96 Honda Ohlins VFR, '03 Cannondale C440R, '03 Cannondale Cannibal, '06 Yamaha 450 Wolverine 4x4
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  4. #3
    Old EV Racer EVcycle's Avatar
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    Quote Originally Posted by Stevo View Post
    Are you going to add your own reverse protection?
    I was not planning on it. I am the one that made the error so I paid the price. The new ones have that.
    EV Ed
    Never let being a responsible adult get in the way of passion and curiosity.
    Motenergy.com
    Ev album 2456, 2458, 2457, 2681, 3456, 3630

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