Power in Flux

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Type: Posts; User: DRZ400

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  1. Replies
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    Looks like the battery box is dangerously low?

    Looks like the battery box is dangerously low?
  2. I bought 3 packs for my E-bike from ebay,...

    I bought 3 packs for my E-bike from ebay, batteries labeled as Samsung. Working great all summer!
  3. Better yet use hover board batteries. On ebay...

    Better yet use hover board batteries. On ebay dirt cheap with BMS
  4. Look for battery packs used for Hover Boards on...

    Look for battery packs used for Hover Boards on ebay. They are 10S2P 36v4ah. Use 5 in parallel for 36v 20ah. They already have a BMS. Only buy ones that state Samsung or LG cells. Also buy a...
  5. Go to monster scooter parts and buy a 36v 600...

    Go to monster scooter parts and buy a 36v 600 watt scooter motor, 36v ESC and throttle. (3) 12v AGM 12ah batteries and a 36v 3amp charger. You will have to fab up a motor sprocket.
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    Next you need to upgrade to Altrax SMP72400.... ...

    Next you need to upgrade to Altrax SMP72400.... the pull is MUCH stronger than the sluggish Kelly! MUCH!!
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    Great to here! Remember to check your brushes at...

    Great to here! Remember to check your brushes at 2k miles.....I didn't and was left stranded on the highway! Figured they last longer then that!
  8. Thread: dc-dc booster

    by DRZ400
    Replies
    17
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    1,764

    Ive been using the BMS battery 600W charger going...

    Ive been using the BMS battery 600W charger going on 4 years and 4800 miles. Never had a problem. Charge to 90v @ 6 amps.
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    How much is the $500 motor and controller? How...

    How much is the $500 motor and controller? How many hours? My agni ate its brushes..... no one stocks them.
  10. Thread: dc-dc booster

    by DRZ400
    Replies
    17
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    1,764

    Use 3 cheap 36v scooter chargers in series

    Use 3 cheap 36v scooter chargers in series
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    Wow, $250 and 3-4 weeks for India! Maybe time...

    Wow, $250 and 3-4 weeks for India! Maybe time to go brushless!
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    542

    Agni Motor short brush life?

    Cruising down the highway at 65mph last Friday I suddenly lost power, no bang, no burning smell. I pull over check fuse, contactor and power to Controller. All looks good. Call a tow and suspect the...
  13. Replies
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    Just the diodes, no caps or resistors. Use 100...

    Just the diodes, no caps or resistors. Use 100 amp blocking diodes (search on ebay, 100 amp diode). One may be enough.
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    How about 2 power diodes with the + output in...

    How about 2 power diodes with the + output in series to drop ~1.4v
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    You mean WHEN not IF! "Interested to see if will...

    You mean WHEN not IF! "Interested to see if will someone release an opensource hack to release the 5kw". Lots of tech savvy people are buying these cars!
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    Tesla is promoting and selling it as a 70kw...

    Tesla is promoting and selling it as a 70kw vehicle though, they just don't see the need to manufacture/stock both a 70 & 75kw pack.
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    Gotcha!

    Gotcha!
  18. Replies
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    6,365

    Kelly controllers do ~ 1/2 their rated value (I...

    Kelly controllers do ~ 1/2 their rated value (I had 2). My 400 amp rated Kelly maxed out at 240 amps. My SPM72400 hits 450 amps. BIG difference in acceleration and pull!! On the other hand you...
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    Simple, I adjust my charger to stop at 90 volts...

    Simple, I adjust my charger to stop at 90 volts (~4.1/cell). I also set the LVC on my controller to 75 volts. This way I can run without a BMS by avoiding the cliffs at both ends. You give up a...
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    Go with 11 the Leaf cells! Sooo much better than...

    Go with 11 the Leaf cells! Sooo much better than building up a 18650 pack. The performance over your present pack will be astounding! Can supply more then your ME1003 will ask for. I have over 150...
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    Just use 11 leaf cells and gear for 5% more then...

    Just use 11 leaf cells and gear for 5% more then your max speed not to exceed 6000 rpm. My bike is geared for 13/72, top speed ~75 mph, rpm just under 6K. Keep in mind the Leaf cells voltage curve...
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    The OP was saying using gearing to increase top...

    The OP was saying using gearing to increase top speed from 110 with 4:1 going to 1:1! So top speed goes from 110 to 440 mph!!!!
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    The current draw is SO HIGH over 75 Mph......

    The current draw is SO HIGH over 75 Mph... especially in a low voltage system. I'd like to know the Power required to keep an SR at 110mph, Likely 15KW or more? Let alone switching to 1:1! I'd...
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    Isn't it nice to have A grade EV cells available...

    Isn't it nice to have A grade EV cells available from the local wrecking Yard! No more crappy mis-matched Lifepo4 from China!
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    Cool....those batteries will give you about 8...

    Cool....those batteries will give you about 8 mile range. When I first built mine I used (6) 35ah AGM mobility batteries from PowerStar in Ill. I got 16-20 miles. They were only $55 each.
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