This setup sounds perfect for a mountain bike evbike good informative video well explained

I clicked on your notification not realizing it was you lol . Pleasant surprise, I miss seeing your videos. LiFePO4 sounds like a great option for lifespan/charging cycles and perhaps safety. Great video and project, I hope you share more. I wish you all the best.

@successfulengineer

3 жыл бұрын

Thanks for the message mate! Yeah, have to stay out-of-trouble somehow, enjoying focusing on these types of projects for a bit.

welcome back buddy good to see you back making a video.looling forward to seeing this video through👍👍

@successfulengineer

3 жыл бұрын

Thanks for the message mate.

Fantastic job on that electric bike. Its about the weight and safety. thumbs up /cheers ScrapBongo

@successfulengineer

3 жыл бұрын

Thanks for the comments mate, always nice to hear from you.

Um, so, AMAZING JOB, really only thing I can say. Nice video.

@successfulengineer

3 жыл бұрын

Thanks Mike, gotta stay busy somehow!

Gidday stranger welcome back ole mate

@successfulengineer

3 жыл бұрын

Appreciate the message Trevor, yeah, something a bit different. Definitely less profitable than Gold recovery, but quite rewarding as a project!

Same welcome back

@successfulengineer

3 жыл бұрын

Thanks mate.

Well now I know why your gold was so pure .your one smart man .this is so interesting .if you need anything from Australia pls contact me . amazing .Tim from Australia.

@successfulengineer

3 жыл бұрын

Always nice to hear from you Tim, appreciate the offer, will be in touch if anything pops up.

Nice job, yeah it takes ages to make a battery pack. My kayak packs are 2 x 96x18650 so thats over 400 hours testing etc before you even connect them

@successfulengineer

3 жыл бұрын

Yeah man, I guess even with the brand new cells I'm still going to have to check them.Thinking of now building a bunch of my cell testers, use them to test the 200ish 32700s and then sell them off.

You are underestimating your 5kw motor. Main problem is your battery. It is good only for ebike not for moped. Just looked at battery meter and see that voltage sag is high enough. So you need good battery with same high current drain cells but 72v and some 40Ah.Controller should be able to feed 400A phase to motor and some 200A dc peak. Your gearing is 1 to 5 so it's good and motor can run some 12kw peak without problems for few minutes.I wouldn't rush to buy 10kw motor in your case. If you decided for upgrade go with qs 138 70h v3 motor with reduction gear box built in.

@successfulengineer

3 жыл бұрын

Hi there, thank you very much for taking the time to leave such a detailed message. Initially I did not believe you were right, but I switched over to look at V instead of current and you are 100% right, the Voltage is sagging to around 40V (From 54V). I was very surprised to see this! I have ordered cells now to build a 40Ah pack, so hopefully that will improve the performance under load! That QS138 also looks very good for a very good price! Thanks again for you guidance.

@vincentpernicano3277

2 жыл бұрын

@@successfulengineer qs 138 v3 with reduction is a beast I can personally attest to this. Handles 17kw peak no problem, have maybe got it to 140 degrees farenheight no matter how hard I ride, weight is 400lbs with me on the bike.

Nice

Hi there!! its been a while. see you find another hobbie (great) how`s that gold fever? it never goes away. this lithium project is very interesting. i see you also make a powerwall. i am doing exacly the same, playing with 18650 batts testing sorting the best ones from laptop batteries and testing for amps and resistance. my project is a solar generator and them a powerwall. keep comming videos interchange opinions and load tests. Love the Electric fast motor bike.,,,regards

@successfulengineer

3 жыл бұрын

Hi Luis, I know what you mean about the Gold fever! I still miss the recovery and find it hard to walk past a piece of E-waste that someone is throwing out! The 18650 testing is always quite fun, almost like hunting for treasure, quite nice when you find some very good cells! Most 18650 testing is done at 500mA, but I have found it much better to test cells at 1A discharge, it really highlights the cells with high internal resistance much better.

I really liked your project and video Just one question don't you think using a transmission connected motor we can achieve better top speed ?

@successfulengineer

2 жыл бұрын

Hi there, yes! I did try to think about whether it would be possible to re-use the motorcycle transmission somehow, it would allow better acceleration and better top speed. In the end, it is quite hard to mount a big motor and the batteries and a transmission in the space available.

A lot of detail in the video. Chain drives are much too noisy for an electric. I think the shaft drives are best, have a cx500 thinking of making it electric because of the shaft drive. It may be possible to reuse the transmission also, but I'm thinking of using a fairly big motor instead, I'm surprised people can get by with such small motors.

@successfulengineer

2 жыл бұрын

Hi, yeah, I reckon a shaft drive would be very nice, the key thing you get with the sprockets is ease of changing the drive ratio, with a shaft, you might have to retain some of the gearbox as you mentioned. The motor shown here was definitely too small, if you look at some of my later videos, you will see I changed to a 10kW PM DC motor, that works well for good torque off the line + top speed of around 100km/h

@murraymadness4674

2 жыл бұрын

@@successfulengineer The shaft drive has about 3.5:1 gearing, which is enough if you have a big motor. You can use a belt drive to replace the chain if you go that route.

nice what the db loss over the wire between the call and the motor

@successfulengineer

3 жыл бұрын

Thanks mate, I don't think the cable losses would be too much, I'm using around 2AWG cable between the battery and Controller, so at 100A-200A the drop across a short length would be minimal. The biggest problem I've seen so far is actually just battery sag, I simply don't have enough capacity yet.

how come you went with mid drive instead of hub motor?

@successfulengineer

2 жыл бұрын

The compliance system in New Zealand is a PITA, so I figured a mid-drive system keeps me closer to the weight distribution of the stock motorbike. It is also conceptually a very simple conversion with a mid-drive motor, just put the motor sprocket exactly where the engine sprocket was and you are set.

what to do reduce noise

@successfulengineer

3 жыл бұрын

The major source of noise now is the chain and sprockets, I see a lot of commercial electric bikes will come out with pulleys and drive belts to get around that.

If you're still riding this in akl I'd love to go for a ride with you. I'm converting a suzuki fxr150. 20s20p Panasonic ncr18650bd battery pack running a qs motors 8-12kw hub motor

@successfulengineer

2 жыл бұрын

Hi, Im waiting for level 2 to start the LVV compliance, but yeah, would be keen to meet up at some point, what part of Auckland are you in?

@kazoolordhd6591

2 жыл бұрын

@@successfulengineer I'm about 50km south of the cbd. Currently spot welding the other half of my pack. Then it's just assembly and paint😀. I'm hoping I have about 100km range so I can theoretically get to work and back without charging if I forget. I'm not electrical like you so this is all new to me. I'm a machinist though so all the brackets and things are easy enough to do at work.

@kazoolordhd6591

2 жыл бұрын

@@successfulengineer I've just uploaded 2 short videos of the project so far if you want to have a look

@successfulengineer

2 жыл бұрын

Looks great, I look forward to watching your progress! Feel free to reach out if you get stuck anywhere on the electrical or electronic side.

@kazoolordhd6591

2 жыл бұрын

@@successfulengineer yup will do. I'll try find diagrams for my pre charge circuit when it arrives which is the only issue I can foresee currently. If you need any parts machined just let me know amd send me a drawing and I'd be happy to do it for free depending on the size and quantity