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    Water inside my hub motor

    I think it does have, Iv'e attached a photo of the hub motor disassembled below, Are you saying that i can just go ahead and cover all the internals with spray paint\epoxy? metals\wires\magnets? Most of the corrosion can be seen on the metal leaves (not sure how to call them, like these in a...
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    Water inside my hub motor

    So the other day the front wheel of my xiaomi m365 (hub motor) started to get stiff and vibrate during ride. Then in the following rides it started spinning normal, then again stiff in the middle of the ride. Ive opened the hub, and water came out of it as i opened it. The inside was wet, and i...
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    BMS low cutoff voltage rather low

    The cutoff of the controller will affect the auxilliary pack as well?
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    BMS low cutoff voltage rather low

    Is there any cheap component/circuit i can add just to limit the voltage of that pack?
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    BMS low cutoff voltage rather low

    All the controllers from China i look at have an LVC of below 3.0v, so i dont have any other alternative (for my budget)
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    BMS low cutoff voltage rather low

    Hi, I'm building a 10S4P pack for an escooter, and im going to use the BMS in the photo: The BMS low voltage cutoff is rated at 2.8v, which sounds too low to me, how do I make the LVC higher (do i need to add another component)? And what is the recommended LVC? I will mention that this pack...
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    What drain rating (18650) is sufficient enough for a battery pack for a 250W hub motor?

    10S3P LG M26 cells inside my Xiaomi M365 scooter. Btw, many times i see people building power packs with a lot of different cells, like this one for example: Whats the logic behind that? And how can it possibly yield good results?
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    What drain rating (18650) is sufficient enough for a battery pack for a 250W hub motor?

    Wouldn't 2 cells in parallel with different capacities balance each other at their total output together? I vaguely remember something like that being said in electronics class in high school 17 years ago :lol:
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    What drain rating (18650) is sufficient enough for a battery pack for a 250W hub motor?

    great explanation, Just to see if i understand it correctly, with the drain rate aside, i should make the extra pack cells (and total pack wattage) identical in mAh and Wh to the original pack? Then it will use most of the juice from all packs, though max drain rate will still be determined by...
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    What drain rating (18650) is sufficient enough for a battery pack for a 250W hub motor?

    Thanks, Does it matter if the cells in the auxilliary pack have a slightly different voltage/capacity than the original pack? I mean, I'm going to use a BMS, it should just "block" the auxilliary pack once it's drained isn't it?
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    What drain rating (18650) is sufficient enough for a battery pack for a 250W hub motor?

    Hi, I intend to build an external battery pack for my Xiaomi M365 (250W hub motor), to connect in parallel with the existing one. I know the one it currently uses are LG MG1 with a 10A max drain rating, but for that specific application, can I get away with 18650 cells with a drain rate of...
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    Xiaomi Power Bank as E-Skate Battery Pack?

    I thought the new Xiaomi powerbank uses 18650, but i was wrong, the 20,000mah version that cost less than 20$ is made of two 3.7v 10,000mah lipos - returning to the original question, you think we can somehow modify it (while eventually keeping them in their enclosures) so we can daisychain a...
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    Xiaomi M365 and battery modification so it can be taken on flights

    Hi all, I'll start with a quote from another thread (sorry cannot remember the person's name): "Iv'e found the Achilles' heel of traveling with an E-scooter. Flights.". As we all know, most airlines limit carrying of spare lithium batteries to 100WH of power. But Iv'e also noticed that most of...
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    thoughts on cheapest diy commuter electric skateboard trike?

    so, any progress with this thing? :)
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    18v drill motor for a short distance oriented board?

    Hi, Iv'e thought about making a small simple board to help me get into the metro station and back, and one i can take with me to cover small distances when my main board is too bulky to hang with. I need it to be small, light weight, don't have to be too fast (15km/h will be perfectly fine). I...
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    Assorted Technical Questions

    Hi, Instead of bothering you all with tons of threads, i thought i might just gather all my newbie questions in one single thread :) 1) This is an idea + a question: Thought about implementing a honk on my remote, have anyone ever done this before? Because the board is relatively...
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    Xiaomi Power Bank as E-Skate Battery Pack?

    I think it's even cheaper than 4 bare LG 18650 (which iv'e seen for 4$+ ech). Anyway, in the meantime i have found another interesting battery pack to possibly replace my triple 12v 7AH SLAs (always looking for some)...
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    Xiaomi Power Bank as E-Skate Battery Pack?

    Hi, Iv'e noticed you can get this 10,000mAh (5V) power banks pretty cheap: http://www.banggood.com/Original-XIAOMI-5_1V-2_1A-10000mAh-Power-Bank-For-Smartphone-p-977406.html?utmid=57 (Will be 11.99$ in a promotion next week). Why not get a bunch of them (They also weigh only ~200gr a pack) and...
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    can you help me to build a E-mountainboard?

    Where do you get suitable wheels and shock-absorbed trucks from?
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    Trying to understand this basic power calculation

    That leads me to another question, As @whitepony said earlier, even at crazy speeds (for a skateboard) of 40kmh, the motor will use about 650W of power, that means that the ESC will provide roughly around 30A@22V - if so, why does many people use such a high rated ESCs (120A, 150A)?
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    Trying to understand this basic power calculation

    So, how do you know what is the "strength" (for lack of a better word) of a specific engine? In cars it's usually the engine size (although not always) that reflect how much strength will the engine have, bigger engine usually implies more horsepower, is this the same with electric engines...
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    Trying to understand this basic power calculation

    I do it all the time :shock: This is actually the first time i have ever owned any kind of board, and i have it only for 3 days, hope i haven'r done any damage. I did notice my motor (although brushed) gets incredibly hot, i will kick start from now own. So this all Max Power thing reminds me...
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    Trying to understand this basic power calculation

    hi, I'm new here so sorry if this question sounds trivial, but i want to understand this basic calculation about maximum power in motors. i see many brushless outrunner motors rated at a couple of thousand Watts @ 6S (e.g 22.2v), and i understand the basic concept of V x A = P, assuming we...
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    Skatey 600 — Replacing The Batteries To LiPo

    I guess i will need a balanced charger of some sort, do you have any recommendation on a budget? In the meantime while i'm still using the Lead Acid batteries, how many charging cycles do they usually give until the they start to weaken? Already charged them twice today, and i am afraid they...
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    Skatey 600 — Replacing The Batteries To LiPo

    thanks, another question, the motor is rated at 36V, a voltage i can't get from combining LiPo cells. Should i just use the closest combination (33.3V)?
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