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    Bypass-Type BMS?

    Very insightful. I'm definitely on board with that logic. But taking that logic to the other extreme, the solution becomes to not even have a bms on the vehicle, only use one for charging. I'd have the reserve (that the pilot wouldn't know about) but in an emergency I'd want to bleed the cells...
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    Bypass-Type BMS?

    I am working on a project in university with a manned heli. I'm looking at a 9kwh pack (restricted by weight). With a pack this large and a discharge current of 300A, around 5C, there is a decent margin for the pack to become unbalanced during a single discharge, correct? Obviously the proper...
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    Bypass-Type BMS?

    I'm rather surprised they dont. Seems like the obvious design choice for a BMS in almost any application. Cost savings would be the only reason I can think of. If anyone from ES is capable of creating such a BMS I would like to get in contact with you. Alternatively, is this the kind of...
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    Bypass-Type BMS?

    Hello ES, I'm working on a rather specialized project and am looking for a 32s BMS with 150A continuous rating and a voltage cut off around 2.7, but also with a few special conditions. When the low voltage kicks in for a low cell, I need the BMS to bypass that cell and continue functioning...
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    Motor getting power, not turning?

    Yep, referenced the ebikes.ca link from before. Not sure the colors line up with the ones in the pdf, but I tested every combination of terminals out of curiousity. The only one that is irregular is the one in the video. The combination giving the problem does not seem to be the ground wire, is...
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    Motor getting power, not turning?

    Hello again ES, Just found a minute to give an update on my motor. Got readings on my hall sensors finally. One was at a constant .63v, not jumping between 0v and 5v as expected. See the video below for more detail. I'm assuming this means replacing my hall sensor? Again, I know very little...
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    Motor getting power, not turning?

    Can you offer some suggestions on my next steps? I know what hall sensors do, but not how they work or how to replace them. At this point I'd be blindly uncoiling things if left to my own devices. A quick google search tells me im looking for 5v jumps on each wire, but if i dont find that, how...
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    Motor getting power, not turning?

    Not the freewheel or the planetary set. Check out the video and let me know what you think. Not sure what I'm looking at :( https://youtu.be/6p5Hi2boDyc 6p5Hi2boDyc
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    Motor getting power, not turning?

    Hello ES, Some of you may have read a recent thread I made lauding the budget super-bike kit from cyclone. I stand by that post, as I have brutally abused it for 300+ miles to date, but this morning my Motor cut out! The problem: When throttled, motor makes the usual high pitch noise, heats up...
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    Battery Compatibility Question; Differing C rates?

    Hi ES, My exact type of battery just went out of production or something and can only find a similar model from the same company. I'm running Floureon 4s 13000mah 25c batteries in series. One cell died, therefore I am purchasing another battery. The closest thing I have found available is a...
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    3 kW Cyclone Middrive, The Budget Dream Kit

    Please do! Sorry, obviously still new here :lol:
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    3 kW Cyclone Middrive, The Budget Dream Kit

    First, a big thanks to wesnewell, dogman dan, and greg_p, as well as everyone else who helped me on my first build. Second, a word of encouragement to first builders. Complexity of a high power or full suspension build is something the veterans here rightfully warn noobs against, but if you do...
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    So Many Lipo Questions! Please Help (First Build)

    3 more questions if youre still here, The maximum voltage will be 84v on my 20s pack. Are you sure it wont cook the 36-72v controller on a full charge? Can i use a 20s bms with only 16s if i decide against having all that voltage? Why no wire nuts? I would be using them between the battery packs
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    So Many Lipo Questions! Please Help (First Build)

    ^ this guy deserves a raise
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    So Many Lipo Questions! Please Help (First Build)

    That was super helpful! So all I need now is this...
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    So Many Lipo Questions! Please Help (First Build)

    HI ES, I'm completely new to Lipo. I've done some research, but I'm struggling to find a bunch of answers still. Please help with as many questions as you can! I want to put 5 of these in series making 74v...
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    Costco Jumper Batteries? Crazy?

    I definitely will, but before I even spend that $60, could you explain the logistics of what I would be getting myself into? how intensive is the build process for a battery like what I'm looking for? what extra costs would the project incur? Is there any other solution for my needs that you...
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    Costco Jumper Batteries? Crazy?

    I honestly can't find a good cheap source for them. Ideally I'm looking for 10Ah at 72v, 30-40 amp continuous draw. I am also on my first build so I am hesitant to wire my own packs up. I am willing to learn, but if anyone has any ready-made solutions for around $500, let me know.
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    Costco Jumper Batteries? Crazy?

    Hello, ES http://www.costco.com/.product.100230151.html?cm_sp=RichRelevance-_-itempageVerticalRight-_-CategorySiloedViewCP&cm_vc=itempageVerticalRight|CategorySiloedViewCP Is it insane to hook 6 of these up to make an 8Ah, 72v battery? The continuous amps certainly seem capable and its the...
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    First Build, Battery Decisions Are HARD

    I guess I'm still a little fuzzy on how to know if a battery will support the draw I ask of it. It's not all about its continuous rating? Could you share your rule of thumb? If I was going to let my dream of 3kw die, are any of those other options going to fit my needs almost as well (will they...
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    First Build, Battery Decisions Are HARD

    Hi ES, Posted once before, but have since simplified my parts list immensely. Just want to make sure these parts are logical together. I am definitely getting cyclone's 3 chainwheel 3kw middrive: http://www.cyclone-tw.com/order-3chain.htm I plan on using it on some steep uphills for mountain...
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    First Build/Conversion, Double Check Me?

    Totally would not have the restraint, good call 8) How about this battery: https://bmsbattery.com/ebike-battery/623-high-c-rate-48v10ah-lifepo4-alloy-07-case-battery-pack-battery.html - Rated for 30Amps, Temporary good to 60. If I get a monitor that lets me watch my amps while I ride, I can...
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    First Build/Conversion, Double Check Me?

    EDIT: Thanks for the link, some good stuff on there - Motor is in one of the drop down menus toward the bottom of the motors - Bike has rim brakes, not disc. Not sure if/how thats relevant though
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    First Build/Conversion, Double Check Me?

    Hi ES, Been lurking for a while and it's time for me to start my first build. I am planning on ordering parts this weekend, so any thoughts that save me time, money, and failure are greatly appreciated. I am new to all of this, so pointing out flaws and explaining alternatives would be...
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