The Rise and Fall of my DIY Ebike 

Battery technician here, though you've used a BMS and checked the voltage of the cells, you've forgotten to check to capacity of the separate cells. The parallel groups need to be the same total capacity for the pack to properly function. An imbalance might occur after a couple of cycles. Your best option is to charge the pack fully until the BMS cuts off and then manually charge the parallel groups that aren't 4.2V up to 4.2V. During discharge the weakest parallel group will cause the BMS to cut off early, but during charging everything will be nicely balanced once the pack reaches 42V again. This prevents overcharging of a single group, as those BMS's often only cut off at 4.28V.

When you flipped the board and the surface mount components were missing I have to admit I about spit my coffee out! 😂 thanks for taking the time to show everything.

That intro is awesome

This is legit!! You seriously do a bunch of my dream experiments!! 😄

Hey Tanner, You did a great job of building that e bike and its battery. Great video editing too. Hope you can get a better motor to replace that little chain drive unit. Keep up the great videos!

Please post more, you just showed up in my feed tonight and I am really enjoying your virus

The ad on this video was for an exercise bike, irony 😂

I had a motor exactly like that one that I ground the sprocket thinner on to use the derailer on it and was able to feed it 2000 watts at 68 volts and it worked well without failure.

Great job, there is so much more work making a pack than most people think. I just made 4 x 80 packs for my kayaks each with its own fuse so 320 fuses haha.

I did something similar, except I used a weedwacker engine. It was extremely fast for its size. At some point I started running nitrous oxide from a whipped cream bottle and it was even faster. It was so fun until the shaft on the engine sheared off 😅

Imagine now with the hub motors where the motor is in the wheel

I once saw a guy trying to DIY Ebike his bike with only 50€. He used a conventional cordless drill with exchangable batteriemodules. He fixated the drill behind the seat onto a plate and just run down a additional chain to the backweel with an extra gear down there. Left everything other the same. So pretty simmilar to what you did. Just without the need of a special motor or motor controll. Then some Trigger mechanism to the front, and it worked pretty well ngl.

That freewheel is the same as many bicycles, you should be able to get that swapped out with a nicer one at a bicycle shop, you could even change the gearing

Hey Tanner i have some questions for you involving building a xenon strobe circuit with a high flash frequency or modifying an existing circuit to flash faster how can i reach you to discuss this you are very good at explaining things so id love if i could get your help

What ?... You can't fix it ?? Also no data about the larger battery ride/test...

awesome video

That ending with piano is sick, what is it?

How do you support all these awesome hobbies? Love the channel btw!

Those are 18650 cells? Do you have really small hands? 😅 Most expensive part of an ebike, next to the motor, might as well not even bother getting a bike and just glue a seat to a child's skateboard, 😂 I wondered how long that 3d printed part might last for, also what stops people stealing your batteries? Maybe a slip or clutch to stop the gear being over torqued?

so sad ;_;

Keep going .Great work bro. Please give me your email