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  1. K

    Evoke Motorcycles

    The motor is made by QS motor and rated to 19 kW compared to 25 kW in The Zero DS. The Evoke controller is 400A@99V, I believe. The Zero is 550A, but with lower voltage. 0-60 mph is said to be 6.0 sec compared to 5 sec for the DS (FX and SR are quicker). Batteries are Samsung SDI which should...
  2. K

    Evoke electric motorcycle using Hub motor

    The zero is quite a step up in price when you compare the battery size. The Zero however is equipped with ABS, which halves the possibility of you killing yourself while riding. For a commuter, that would be worth a lot.
  3. K

    Evoke electric motorcycle using Hub motor

    Just read the news about the Urban S now using Samsung SDI cells instead. This is interesting. The only thing (not so small unfortunately) keeping me from buying one immediately is the lack of ABS.
  4. K

    Evoke electric motorcycle using Hub motor

    Could you link some reviews? I'll just run them in google translate.
  5. K

    Evoke electric motorcycle using Hub motor

    To bad that you didn't have the chance to try it out. I still haven't seen any reviews of the bike on the Internet, which is odd since they have been selling it for a while now.
  6. K

    Evoke electric motorcycle using Hub motor

    Where do you see the European dealer? Has anyone actually tried in of these? Google doesn't actually tell me that much more..
  7. K

    Low voltage cutoff for cold lithium batteries

    Wow, that was really good. So what they basically are saying is that under load or when it is cold, it is okay to go below the regular low voltage cutoff, since the voltage is lowered by higher internal resistance, not by battery energy depletion.
  8. K

    Low voltage cutoff for cold lithium batteries

    It's not the cold itself I'm worried about. The cell can handle -45°C on discharge. What I'm worried about is the voltage during acceleration going below what is normally the low voltage cutoff.
  9. K

    Low voltage cutoff for cold lithium batteries

    I'm using lifepo-batteries in my electric motorcycle. The motorcycle has 24 cells and thus a nominal voltage of around 77V. During normal temperatures the voltage dips around 5-7 Volt when high power is pulled from the pack during max acceleration. When the cells are cold, i.e. 0°C or below...
  10. K

    Cold killed my 12V LiFeYPo

    Its only 45W, so it should take around 6 days on average to fill the battery. Yesterday there was some shade in the afternoon where the boat lies, but tomorrow it will be in the sun the whole day. Lets se if that gives me any extra amp hours.
  11. K

    Cold killed my 12V LiFeYPo

    I did connect the battery to a regular 12V lead acid battery charger, and it did charge the battery up to 13V. After that I connected it to my regular solar panel setup in the boat. It seems like it's stuck at 13.1V though, so I guess some cell(s) is/are damaged. I haven't drilled a hole yet to...
  12. K

    New e-bike project

    Some news on this project. The Keyde motor apparently didn't work in rain. It was flooded and stopped working. Now Keyde want me to send the motor back at my own cost (> 70 USD). Of course that is not reasonable since they obviously sent me a broken item at the first time. The motor is supposed...
  13. K

    New e-bike project

    Of course it's an RCA-connector. But with a shorter middle pin. It does fit perfectly with an ordinary RCA though. A little report from last run; Did 12 km with the bike. Average speed 24 km/h, max seems to be around 32 km/h. The 6.8Ah battery had a voltage if 33.6V afterwards. Not sure about...
  14. K

    New e-bike project

    Assembled the bike with the keyde motor. Runs really good. I get around 32 km/h with minimal input from my legs. Haven't tried for distance yet with my 6,8Ah battery, but after 15 km the battery voltage was 33,6V. Bad quality on the battery LED indicator strip. That thing died the first day...
  15. K

    New e-bike project

    Deans are nice, but the female battery connector is built into the battery itself. See the connector inside the red ring. I could of course chop of the connector and build an adapter from it..
  16. K

    New e-bike project

    The Keyde rear hub motor arrived last week. Looking good so far. Does anyone know what connector they are using for their battery? It looks like some kind of coax, about 10 mm outside diameter, 3 mm pin diameter.
  17. K

    New e-bike project

    260 rpm it is then. Let's hope they can get the wheel rim size correct.. I wonder a 10 speed Shimano 105 5700 cassette will fit. I don't see any measurements on the keyde hub motor.
  18. K

    New e-bike project

    I will go for this motor in the end: http://www.keyde.com/?do=product&lang=en&event=view&ids=12 However, I'm not sure about the RMP. My goal is to use this motor for high end assist on flat road. I normally pedal at around 20-25 km/h and would like to have assistance between 15-35 km/h. It looks...
  19. K

    Cold killed my 12V LiFeYPo

    Yes, I did charge up 8V using 2S setting, and then 3S setting up to 10V. However I need to do a full charge to see if any cells are dead according to dogmans suggestion above, so I'm currently looking for a suitable charger that I can use LiFePo-cells, RC-packs and my e-bike project. Drilling...
  20. K

    New e-bike project

    Ah, there is the keyde.com site up and running again. It was actually the Bompton thread over at the pedelec uk forums that I first read about these small hub motors. But the keyde.com website was down all yesterday, so I thought they were out of business. Their bottle batteries looks really...
  21. K

    New e-bike project

    That sounds good. Has anyone actually tried the kit they are selling or know which brand of motor it is? I'm also a bit curious about how many gears that will fit and if the gear switch handles are compatible with different number of gears on the rear wheel.
  22. K

    New e-bike project

    I'm looking to build a commuter e-bike using my Ridley X-bow 1317A Cyclocross. I'll try to go for a rear hub drive of 250W if possible and I have been looking at the kit from ciclotekstore: http://www.ciclotekstore.eu/b2c/producto/9822112/2/mk-e-bike-motor-kit-rear-...
  23. K

    Cold killed my 12V LiFeYPo

    You are right. My charger doesn't handle the correct LiFePo4 voltage cutoff.
  24. K

    Cold killed my 12V LiFeYPo

    The B6AC-charger charged up to 11,2V, then it gave me a "vol sel error". I guess some cells are bad, so I'll have to cut it up.
  25. K

    Cold killed my 12V LiFeYPo

    Sorry, my bad. I'm only using the MiniBMS-Display component, which monitors the energy of the pack. http://minibms.mybigcommerce.com/products/EV-Display.html For low/high voltage cutoff I use a CMP12 solar pwm regulator: http://www.elvet.co.rs/Solarni%20kontroler%203%20%20KEMO.pdf Which uses 20...
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