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  • commuter ebikes
    replied
    Originally posted by Ebike1 View Post
    I'm sorry I missed this post some how .
    If you run 2 battery's in series then you would need to have the proper BMS because the volts rise when in cells are in series
    I have two 36V LiMn 18650 batteries in series and, although I never draw over 30A continuous, I use a 100A BMS on each 36V battery.

    When I had this setup and used a 50A BMS on each 36V battery, 75% of the BMS units burned. Back then, though, I did not limit my current so it was more like 45A continuous with 1 to 2 second bursts of about 82A.

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  • Ebike1
    replied
    I'm sorry I missed this post some how .
    If you run 2 battery's in series then you would need to have the proper BMS because the volts rise when in cells are in series

    Leave a comment:


  • Dale H
    replied
    More sound advice from one who has been there!!! Commuter Ebikes has some seriously sweet rides, and some good vids on Youtube, under Industial Ebikes. I like the idea of overbuilding if you can afford it, then no worries about your equipment failing.

    Leave a comment:


  • commuter ebikes
    replied
    Originally posted by Green Werks View Post
    Greetings
    I pose a question for the pro's
    I have a entry level set up
    52v 24 ah battery
    sine wave controller set to 50 amps
    and a edge 1500 watt DD pushed to 2600w
    do you think that I could run two of these batteries together to up my voltage
    would my CA work with that much voltage
    and get a new controller to handle it
    This is the controller I am thinking about https://electricrt.com/blogs/news/sa...ller-tech-info
    what say you
    thankx in advance
    The fully charged voltage of a 96V battery is about 111.9V, so be aware that hot off the charger you may be sending up to 111.9V X 50A = 5595W to your 1500W motor which would heat up the motor quickly. In practice, you would have to limit the current so that your motor doesn't overheat. I have 50mm magnet motor and heat issues present themselves at about 50 continuous Amps at 72V (3600W). A 50mm magnet motor is rated at 3000W continuous, 6000W peak: http://www.qs-motor.com/product/1000...rop-out-150mm/.

    My CA V3 has seen up to 115.6A with no problems.

    I have found that overbuilding a system (motor/controller/cells/BMS) works well in order to stave off heat issues. For example, one could use a 50mm magnet motor, 24 FET controller, 3400mAh high drain cells with a 100-150A BMS and then limit the current so as to run the system under 3000W. This setup would not strain or overheat any component. I call this "sending a man to do a boy's job".
    Last edited by commuter ebikes; 05-07-2017, 11:12 PM.

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  • Dale H
    replied
    HAHAHA, ain't love grand lol. But seriously fwb now works for Luna, and will is probably out riding somewhere. Yeah EB1 is the real deal for sure, I believe he will be able to help ya out. Good luck on the upgrade and keep us posted of progress. Dale out.

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  • Green Werks
    replied
    Dale ma Man what up dude
    I am hoping that EB1 can tighten me up
    WTF happened to fwb and will ride those guys just disappeared
    I thought that I read some where that they fell in love on the forum and have run off together
    to SF to open up a ebike shop
    Cheers my Brother
    Billy.

    Leave a comment:


  • Dale H
    replied
    GW, long time no chat!! I think the dude you want to talk to would be EBike 1, he has a similar voltage on a much bigger rear hub. I'd give him a shout to see what he says. Seems to me as long as you have the controller and your Edge can take that kind of voltage it shouldn't be a problem, but I'm no expert so take what I suggest with a grain of salt. Ride on safely my friend, Dale

    Leave a comment:


  • Green Werks
    started a topic is it doable

    is it doable

    Greetings
    I pose a question for the pro's
    I have a entry level set up
    52v 24 ah battery
    sine wave controller set to 50 amps
    and a edge 1500 watt DD pushed to 2600w
    do you think that I could run two of these batteries together to up my voltage
    would my CA work with that much voltage
    and get a new controller to handle it
    This is the controller I am thinking about https://electricrt.com/blogs/news/sa...ller-tech-info
    what say you
    thankx in advance
    Last edited by Green Werks; 05-07-2017, 06:18 AM.
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