Recent content by cocoon

https://www.youtube.com/watch?v=6m_iIbX0gmA i see the future in this type of motors (axial flux with permanent magnets). It is very easy to cool the coils becouse they are on each side of the rotor and not moving. Even some cryogenic cooling is possible in future. This can boost engine peak...

hey guys :) U-motor is ya friend https://www.uumotor.com/webstore/ they have all wicked stuff you need and they have somwhere on normal prices. this looks RAD :) https://www.uumotor.com/webstore/scooter-motor/10-inch-fat-tire-10x6-55-electric-scooter-motor i think it can chew 1000 w...

Hi cocoon, thank you for your support ! :wink: God I realize I haven't updated this thread in ages. I'm curious to see which solution you came with, and also which layout / wheel sizes you're going to use ? Will it be a 1WD ? Stator directly mounted on the frame may be a nice solution to...

Hi! nice job man! im also developing engine for inline skates. I hope i will have working prototype assambled in next week. It is special kind of motor.. wheel is part of motor. Stator is mounted on the chassis. Setup is very light.. we will see about power and efficiency. I managed to mount...

Im satisfied with result.. nice and easy to use commuter bike with top speed of 35kmh on flat. End price 500 €.. :)

Hi everyone! i will upload finished pack pictures but i have one question.. today i charged the battery and then i wanted to check the voltage on charging pin.. i made a nasty shortcut... Arc melted 1cm of my multimeter rod and bike was not working any more.. i disasambled the pack and...

Thx. No, pipe is plastic and is not part of the frame :) Today i finished with battery... im still waiting for BMS. One was lost on way from China. I ordered second BMS from UK. But i tried to charge battery today with 2.1 A 41,6 V (hoverboard) charger and i cant belive but cells are even full...

Here is my progress. i decided to go with tesla style fuses. Pack is bolted together (you cant see on this picture) but i will also use some more hot glue to make it even more rigid. I'm a bit worried that vibrations could damage connections. Fuses are 0,3 mm copper wires (12 A). I'm impressed...

I'm about to make connections today. What do you think of tesla styl fuses yes/no?

Hi everyone! I just want to share a way to make simple and rigid battery pack for your ebike.. My goal was to make simple, stealth, cheap and good battery pack. I came up with idea to put batterys in sewage PPE 110 mm pipe. It is not finished yet but i will post progress in this topic. Any...

This could be my "fast" charger...

I'm planning to charge 10s7p battery with 2A charger. Do you know any EU source for faster chargers? Panasonic cells i have are now uniform charged. I tested all 70 cells and voltage is 3.50v

I will reconsider about using onboard charger.. The slow ones are cheap so i can have one at office and one at home. With this setup i will have an option to use fast charger if neaded and avoid possible problems with onboard charger. Now ill just have to wait for 18650 battery holders from...

Source (YT - comment) is referring to BMS balancing.. Cmmenter said That balancing with low currents couses crystal formation.. I didn't find any sources to comfirm that. Night temperatures here are low also in the summer, they are below 20C My bike will be stored in AC office and at home on...

Hi guys and girls of ES! :) I'm building new battery pack for my new daily commuter. I live in Ljubljana (EU) where city is almost flat. I have chosen 350 w geared motor (i like freewheeling option when i sprint from office to home 8) ). Controller is KT24, 36V, rated current 7 A, max current...