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  1. E

    Using the Cycle Analyst

    You can set current limit and you can also set a max speed using the plug in CA. You need to ensure the controller is suitably equipped and that the controller is suitable for your type of motor. I do not believe you require hall sensors on your motor for the CA to limit the controller in this...
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    Group Buy on Tongxin Motors

    I'm not a consumer and the last time I bought motors it was 10,000USD worth. Tongxin don't answer emails and from what I have seen they are very unreliable motors. They can keep their motors as there are plenty of other companies that do respond and have motors that don't fall apart if you look...
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    Titanium bike. ultimate donor bike?

    There's a nice looking cylindrical battery pack that is now becoming available that has a mounting to go onto the washer bottle. This is a 36V, 9Ah Li Ion pack. Also seen some 7Ah packs that are a bit smaller that bolt onto the seat tube or could go somewhere else. The kits that Bafang offer...
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    Titanium bike. ultimate donor bike?

    What's so special about the Dapush or Dapu setup? I've tried it and didn't find it any better or worse than other stuff that is available from Bafang or Ananda. I found it very similar in size and performance to the Ananda 108 motor, smaller than the Bafang front motor but not as quiet. I...
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    Depth of discharge?

    That's absolutely spot on and this is how packs in EVs can have such a long lifecycle. The only problem with actually trying to implement this on your average ebike is that although you can control the DOD it's not so easy to control the charging level. The BMS inside is fixed to certain values...
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    Depth of discharge?

    There's 2 terms commonly used, DOD, Depth of Discharge and SOC, State of Charge. DOD of 100% is completely discharged, no more power remaining. 100% SOC is fully charged and is related to temperature as well as voltage so it's not as simple as saying 100% SOC is 3.65V for LifePO4. The same...
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    Highest energy density and highest power cells available

    No worries I'm only having a laugh :) Nothing wrong with some extra strong watts and you've always got to consider the tolerances in such things and different rolling radius of tyres etc ect just to ensure that everyone gets their fair share ;)
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    Highest energy density and highest power cells available

    A 20A controller on a 36V 250W ebike :eek: Is that legal? ;)
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    Highest energy density and highest power cells available

    Yeah I do believe it is feasible but I don't really have the time right now to take on another small project like engineering a complete solution. I have a big pack that is already overdue and it has been big headaches and untold time sorting out all the little details. Also I'm not so sure...
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    Highest energy density and highest power cells available

    Yeah of course RC lipo is good stuff but if over charged or over discharged it is liable to burst into flames. They sell fire proof bags for charging :eek: You can only get good lifecycles if you are very careful with not going to deep discharge levels. It is not forgiving and the prices are...
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    Highest energy density and highest power cells available

    I was only referring to the cells themselves and yes I didn't state LiFePO4 in the but I did in the message. The 20Ah cells are generally 467g and are 3.3V nominal, 20Ah, so 66Whrs per cell. So they have an energy density of 141.3Whrs/kg combined with very high power density of something like...
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    Highest energy density and highest power cells available

    I do take note and will look at trying to offer some more options. The A123 26650s in a small pack can still give great power if you haven't got far to go. There are also various Li Polymer and LiFePO4 pouch cells that give good performance in a compact package with sufficient current to easily...
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    Highest energy density and highest power cells available

    Thanks Paul :) Yeah I know these cells are not for everyone but if you were looking to have a slightly illegal bike... then these fit the bill very nicely. I will try to diversify a bit more in the future and start to supply packs with lower C ratings and price tags :)
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    Highest energy density and highest power cells available

    Unfortunately I doubt these cells would fit into a typical ebike battery enclosure. The enclosures tend to be narrower than these cells. The 15Ah cells are approximately 15cm wide. The main hurdle to changing the cells in your batteries would be that LiPoly is typically smaller and lighter...
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    20C constant Prismatic LiFePO4 Packs/Cells

    Gents, just thought I'd give my fellow countrymen the opportunity to get some really top quality Battery Packs at very competitive prices. I'm keeping the prices in USD as I think this is the fairest way as it is pretty much pegged to the Chinese RMB and I'd rather give everyone a level...
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    Highest energy density and highest power cells available

    I should add that I will happily supply the parts necessary for self assembly and this would save a bit. With the assembly parts I've developed it really isn't so difficult to assemble a pack yourself and no special tools are required. So if you were willing to get your hands dirty and let them...
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    Puma 500W Motors 160USD plus shipping

    Yes of course :)
  18. E

    Highest energy density and highest power cells available

    I really think most do not comprehend the difference between a pack of these cells and run of the mill cells. The power they deliver is unbelievable. A pack like that would be 450USD for the cells (37.50USD a pc), about 80USD for assembly and parts, BMS 45USD, 5A charger 60USD, so 635USD or...
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    Highest energy density and highest power cells available

    Hi Gents, I've not been getting onto Pedelecs so much recently as I've been a bit busy with some rather special cells I've been working with. These cells are LiFePO4 and are produced by a very famous and regarded by many as the no. 1 cell manufacturer in the world. They certainly perform and...
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    Reliable, no really RELIABLE High End E-Bike Recommendations?

    Hi Tex, why don't you look at a reasonably powerful Geared Hub motor? 2 motors that would work well for you IMO are the Bafang BPM climber and the Puma motors. These are not the smallest motors but they are very powerful, maybe more power than you would want (although both offer lower powered...