I’m using 56v and 60v batteries on a Bafang 48v motor. The Bafang system will detect an over voltage situation at 61.5v (error code 7H), so some combination of 60v and 58v batteries in parallel tends to keep voltages within acceptable peak charging. 40v Ryobi batteries for lawnmowers are 6aH. The major brands for 56v and 60v batteries are Greenworks, Ego, Echo and Toro. A lot of choices to use here.
Nathan grant: do have a schematic of your setup. did you have to change the voltage level at the controller board. Does the controller board give you a option to change the watts from 750 watts to 500 watts? You have an interesting setup.
A note, you should not be recommending users to parallel two batteries without balancing them first. You will get one battery discharging to charge the other battery, which can be unsafe if the voltage differences are great. If you want to balance two, you should get them to charge as close as possible, and then set up a large resistor between the two. Alternatively, you can use a single larger battery, or use a transfer switch, or manually swap the batteries.
You should post your video on your Linkedin! Love the battery mounts you guys made! How did you guys come up with your power usage calculators? Hope your team got a good grade on your project 🤙
Have you guys ran the bafang with just one ryobi battery? Will the bms in the battery shutdown from the amp draw? Not sure what the max continuous current is on those batteries.
This is the reason puts people off buying bikes these days cos bikes in general and then ebikes cost so much when they shouldn't , well done for showing the world how it can be done and shame on you greedy bike companies for ripping people off congratulations on your marketing for getting people to buy a motor and a few tubes priced like cars that have 10000 more parts to people who more money than sense.
Hi All, Can anyone help me modify the files for a Trek 7.2FX commuter bike? I have no idea what I am doing but I do have access to a 3-D printer through our public library. Thank you! Jacob
Do you have a version of this 3D printed part that has a flat backside?? I want to use this for something other than a bicycle, and need it to lay flat. Thanks in advance!!!!
They made the Fusion 360 files available. If you've used that software before, you can open the model and modify it as you would like, including making the back flat.
The link in the description shows everything they used. The particular motor they used is rated for 48v, but as stated in the video and description, they're using 40v batteries.
When you buy a name brand battery instead of a counterfeit, you're paying for reliability, consistency, and durability. Worth it if you rely on your bike for transportation, without a doubt.
LOL...taking a BAFANG to "a local bike shop and they will be happy to help"....Uh no. If you walk into a Local Bike Shop (LBS) with anything BAFANG or Rad Power and you will be laughed at. No LBS is going to touch those motors or bikes for liability reasons alone. Especially in 2021 with how bike parts are scarce as well as bike mechanics. Yeah, no one will help with these motors - you're on your own.
Yesterday, I took my Voilamart rear hub motor to my LBS. The freewheel sounded like a garbage disposal. They offered to grease or tighten it, or replace it. They mounted a new freewheel for $15 and wouldn’t let me pay for their labor. What’s sad is that the trek I bought from them 15 years ago is my daily commuter. It was $200 new, and the only thing I’ve replaced is tires. So I’ve only seen them twice in 15 years. The other 2 bike shops in town went out of business this year.
![DIY eBike Battery Build with 18650 Batteries [ How to Tutorial ]](/img/1.gif)
Please provide info on the throttle and controller used in this project. Thank you for a great project!
Great Project, AND It's Open Source! Absolutely Amazing Work; If I Make a DIY E-Bike I'll probably use this method.
This is amazing way to use the batteries that already with us.
Excellent work y'all.
I’m using 56v and 60v batteries on a Bafang 48v motor. The Bafang system will detect an over voltage situation at 61.5v (error code 7H), so some combination of 60v and 58v batteries in parallel tends to keep voltages within acceptable peak charging.
40v Ryobi batteries for lawnmowers are 6aH. The major brands for 56v and 60v batteries are Greenworks, Ego, Echo and Toro. A lot of choices to use here.
Nathan grant: do have a schematic of your setup. did you have to change the voltage level at the controller board. Does the controller board give you a option to change the watts from 750 watts to 500 watts? You have an interesting setup.
A note, you should not be recommending users to parallel two batteries without balancing them first. You will get one battery discharging to charge the other battery, which can be unsafe if the voltage differences are great.
If you want to balance two, you should get them to charge as close as possible, and then set up a large resistor between the two. Alternatively, you can use a single larger battery, or use a transfer switch, or manually swap the batteries.
What connectors did you use to connect to the battery and then to the XT60 connector? "power timer contacts"?
Where do you get the "power timer connectors?"
You should post your video on your Linkedin! Love the battery mounts you guys made! How did you guys come up with your power usage calculators? Hope your team got a good grade on your project 🤙
Very Clean Install and great instructions!
your work is awsome
4Ah x 2 = 1280 Wh
Throttle Assist Range 50 Approximate Miles
Pedal Assist Range Approximate Miles
Wrong! 4Ahx2x40V = 320 Wh
I dont see a parts list for the bits you have to buy? I checked the github too
It is there
EBike XProject Written Documentation.pdf
uploading written documentation
Have you guys ran the bafang with just one ryobi battery? Will the bms in the battery shutdown from the amp draw? Not sure what the max continuous current is on those batteries.
I want this!
This is the reason puts people off buying bikes these days cos bikes in general and then ebikes cost so much when they shouldn't , well done for showing the world how it can be done and shame on you greedy bike companies for ripping people off congratulations on your marketing for getting people to buy a motor and a few tubes priced like cars that have 10000 more parts to people who more money than sense.
This costs MORE than pre built ebike, Those are EXPENSIVE batteries and joining them up like that in parallel is a really bad idea.
Amazing Idea.
Hi All,
Can anyone help me modify the files for a Trek 7.2FX commuter bike? I have no idea what I am doing but I do have access to a 3-D printer through our public library.
Thank you!
Jacob
What's up with your audio? Can't hear it.
Do you have a version of this 3D printed part that has a flat backside?? I want to use this for something other than a bicycle, and need it to lay flat. Thanks in advance!!!!
They made the Fusion 360 files available. If you've used that software before, you can open the model and modify it as you would like, including making the back flat.
@@BenjaminNelsonX Sorry, but no, I have never tried any 3D modeling.
Great project! Did you use a 36v motor?
The link in the description shows everything they used. The particular motor they used is rated for 48v, but as stated in the video and description, they're using 40v batteries.
25w/hr per mile!?!? That seems a little on the low side
WOW⚡⚡⚡⚡👌👌👌👌👌👏👏👏👏👏👏⭐⭐⭐⭐⭐
*EBAY BATTERIES ARE WAY MUCH CHEAPER*
Ebay 40v ryobi batteries are crap though.. i bought a 6ah batt and it weighed less on a scale than my oem 4ah battery.
When you buy a name brand battery instead of a counterfeit, you're paying for reliability, consistency, and durability. Worth it if you rely on your bike for transportation, without a doubt.
LOL...taking a BAFANG to "a local bike shop and they will be happy to help"....Uh no. If you walk into a Local Bike Shop (LBS) with anything BAFANG or Rad Power and you will be laughed at. No LBS is going to touch those motors or bikes for liability reasons alone. Especially in 2021 with how bike parts are scarce as well as bike mechanics. Yeah, no one will help with these motors - you're on your own.
People able to make this usally repairs their own bike, atleast I do.
Yesterday, I took my Voilamart rear hub motor to my LBS. The freewheel sounded like a garbage disposal. They offered to grease or tighten it, or replace it. They mounted a new freewheel for $15 and wouldn’t let me pay for their labor.
What’s sad is that the trek I bought from them 15 years ago is my daily commuter. It was $200 new, and the only thing I’ve replaced is tires.
So I’ve only seen them twice in 15 years. The other 2 bike shops in town went out of business this year.
Some places do, some don't. People just should not get upset if they do not.
100% true, unfortunately
lol open source? Yall just bought an ebike kit and spliced 2 power tool batteries together then act like it was some kind of achievement...
pls tech suport
I started with Woodglut plans.