Fixing the Biggest Problems on My Fat Tire E-Bike! (Will It Work?)

PCBWay link pcbway.com/g/3...
,72 volt electric bike has BMS and hall effect issues in this build and test video
3d model of the 10mm croc thing www.cgtrader.c....
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[@alasdair4161]

Great work. You should look at fitting an active cell balancer. I use them on all my high power batteries and the version I use will deliver up to 5A balancing current out of the average even during use, and they maintain cells within 1mV of each other. The only downside is they do have a slight draw at all times, so I keep the packs in storage charge when not being used by using a small boost module dialled in to 50% charge voltage (3.7V/Cell x S count) with just a 1A plug pack to maintain that required voltage. I also add a tiny audible low voltage alarm which has saved me once when the plug was knocked out. Cheers.

[@DktheWelder]

Good idea I will look into that thank

[@Hogla287]

I'm just impressed with how easily you're throwing around that pig. Looks heavy!

[@jthoney]

Finaly dk the welder uploaded again

[@DktheWelder]

Haha, sorry been awhile and had some issues should be more videos coming up

[@connerlabs]

Watching from Scotland, a bit jealous of the NZ summer right now!

[@DktheWelder]

The weather is so good here at the moment, I need to make the most of it

[@adrianio1000]

So a tip for DIY-ers: CRIMP, DO NOT SOLDER. If you solder a crimped connector the heat form soldering quenches the metal and decreases the friction between the copper and the terminal. Either solder or crimp, never both. Also soldering is ill-advised in any kind of automotive environment since vibrations can cause brittle solder to fail.

[@DktheWelder]

I didn’t know that thanks for telling me, I will check the connections

[@ABCustoms]

hey Daniel! I suspect that your controller needs to go through the self-learning mode again because the Hall position is no longer correct. I also think that a lot more power can be extracted from the motor look at the power from my buggy, and that is only at 60 volts. hey and be careful with that battery! if you get too much imbalance your battery can catch fire and everything is gone! all in all a very cool thing!

[@DktheWelder]

I have run the self learn a couple of times it is working pretty well, the battery balance is a pain I can’t get the bms to do it

[@motorhead1884]

The coolest E-bike i have seen on youtube man. I want one 😫

[@DktheWelder]

It is pretty cool, I might build another one to sell once I have done more testing 👍

[@BruceLyeg]

You make a fairly heavy bike look somewhat graceful. What are your next plans for the bike? A little debugging and some fine adjustments is probably about all it needs to be a reliably fun and useful bike

[@DktheWelder]

It is pretty good how it is, a hub motor in the front wheel for 2wd would be cool. I will keep doing rides on it testing on different terrain

[@clickbaitnumberone1403]

Might be an idea to springload the battery and the control unit so they don't get the hard pushes. So that they are not tight connected to the frame, well I think you get it ;-))

[@DktheWelder]

The battery and bms are in a padded enclosure. I’m not sure how much vibration everything can take a big learning curve

[@Paulman50]

I use a controller that doesn't use the hall effects cencers. Be a good unit to have on hand for testing. Looking forward to seeing the beach testing.

[@DktheWelder]

Can you do that? Is that how those rc motors work?

[@stvheat]

Awesome video mate. You know a lot about electronics!!!

[@DktheWelder]

I knew nothing before this project I got forced to learn quickly haha

[@Erroct1]

You could run it sensorless. Motors have back emf and u can read position with that. Depends if controller supports it. Hall sensor always be breaking man

[@DktheWelder]

I didn’t know that. Another guy mentioned that too it is a far driver controller not sure if it does I will try find out

[@ryan266846]

What a weapon of a bike!

[@andyredvolvo9434]

Awesome job👀👌🏴󠁧󠁢󠁥󠁮󠁧󠁿

[@DktheWelder]

Thanks 👍

[@onbedoeldekut1515]

Have you seen the At-At that a bloke made to ride on, it walks and is amazing! I'm sure it'd be high in the search returns.

[@DktheWelder]

Yeah James brutton made that super clever guy!

[@onbedoeldekut1515]

You could attach pontoons to this and have an amphibious bike!

[@DktheWelder]

I was thinking that haha

[@selwynellison8504]

I'm have same problem with E bike . Have burnt out all the hallagixs sensors and had to replace the whole internals of motor .

[@DktheWelder]

Glad I didn’t have to do that! It was bad enough trying to work out what was wrong

[@nullc0ntext]

ACK I was just waiting for there to be a croc in that creek man, haha.

[@DktheWelder]

No crocs in New Zealand. Only the ones on my feet haha

[@MasterIvo]

did you try to adjust the hall sensors to get a higher max speed/tork?

[@DktheWelder]

I haven’t tried, I am pretty sure the auto learn sorts that out anyways, the torque is good I could gear it higher for more top speed but it is for mostly off-road so I think I will leave it how it is

[@knoxieman]

The hall sensors in most Chinese motors are not good, swap them out for some properly sourced branded ones from digikey or mouser as there are a lot of fakes online and keep a board ready because those Chinese ones will fail again, they don't like getting hot either, i always used Honeywell ones and ive been doing this since the mid 90s. and never had them fail.

[@DktheWelder]

Thanks I will keep that in mind. It is a pain dealing with such a cheap part failing

[@thelonewrangler1008]

Thanks, actually learned a few a things

[@DktheWelder]

That’s good I definitely learned a lot in this video

[@Ben-Dixey]

Fun video! Enjoyed it. 😀

[@andreworlando7374]

Happy to see you bro😊

[@DktheWelder]

Thanks for watching 😊

[@rickburnout666]

Can this be charged with solar panels while riding?

[@DktheWelder]

Yes that would be possible but it would change really slowly with a small panel

[@rickburnout666]

@DktheWelder that might be a good idea if it could give enough charge to keep you riding for a fair bit longer, It all looks like magicians work to me.

[@chris993361]

I just fixed my electric bike. Now the first thing I should do is take it in the water! 😂

[@DktheWelder]

I know I really wanted to go deeper but really don’t want to ruin something!

[@stevensmith9895]

NIce to See a kiwi on you tube and inventing (making) things

[@DktheWelder]

Need more kiwis on KZbin!

[@sergiososa5855]

exceelenteeeeeeeeeeeeeeeeeeeeeeeee men!!!⚡⚡⚡⚡⚡

[@Epsonblade]

You would have sht mixed all those other bikes brother... I know it hurts. Keep pushing!

[@DktheWelder]

Haha, thanks

[@mrglasecki]

😂 boss those are steel belted car tires, it might float if they were 2 ply floatation tires,. 350# might need duals 🤣

[@DktheWelder]

I know I have been looking for some better tires but just can’t find any light tires in the size I want haha

[@Kapil-Patel]

sick as 🔥

[@UserUnknownError]

what type of welding hood/rig is that?

[@DktheWelder]

It is a 3m adflow setup really expensive I used it at work but have a company one to use now so took that one home👍

[@LACARRINDANGA]

Hi again. Is your speedo in km or mph ?

[@DktheWelder]

Kph , it’s not fast but I will leave the gearing like that for more torque 👍

[@retrofitter]

It would work great in the sand with tyres that wide

[@DktheWelder]

I am hoping to try it on the beach soon👍

[@tn8584]

Such a cool toy

[@DktheWelder]

Thanks 👍

[@DANFUL1]

Nice

[@xpndblhero5170]

You are fkn insane for riding this barefoot.... 😂

[@DktheWelder]

I had safety crocs on most of the time

[@Tombilicus]

**BMS** STANDS FOR **B** OWEL **M** OVEMENT **S** MELL

[@DktheWelder]

I didn’t know that thanks haha

[@knoxieman]

Battery Murdering System, they caused more hassle and damage with my builds than they were worth, in the end i used to balance charge with cell monitoring and just watch the terminal voltage when riding, badly made BMS units can drain cells and wreck batteries, if you are careful and you leave a good bottom limit in your cells you dont need active BMS on a bike like this, just balance charge and monitor terminal volts, in most cases failing cells will have already failed by the time the BMS catches it.

[@raitshots]

Us standart car battery and capciator. . Easy variant your motorcycles project. Well us little battery ok compact. Later time little battery energy defects. Again rebuild . But easy us car battery energy. View size your e motorcycle frame . Little battery not cheap and rebuild time home 😂😂. Test us car battery . Ok weight car battery but good project for e motorcycles system . Make strong electronic generator & battery energy systems power transformator. Drive generator upload energy back . This later time Dakar dune rally cross versia. Good project 😎👍

[@raitshots]

Nja video view test off road river😂😂😂😂 Don't us coal engine electro. But BL motor eletcro no problem off road drive swamp or river water (waterprof)