An Electric Scooter Community on a Mission to Stamp out Transportation Mediocrity.

Micro mobility projects built using electric scooter components.
By oznet
Posts
#20830
Got a Ninebot Max for my son this christmas. At first the 18mph seemed fast, but quickly we wanted more.
I saw this youtube video and decided to try to add more voltage.

I didn't want to take the battery out and swap it with a 48v, as it was essentially new (only 4 complete charge cycles)
So I decided to make a pack to put in series. I wanted the option to put the scooter back completely to stock. Since there were XT60 connectors on the inside, I decided to make a wiring harness that would just plug in.

I ordered 18 Sony VTC6 batteries, to create a 3s6p battery. I 3D printed a cell holder I created on tinkercad, based on a 18650 compression holder I saw on thingiverse. I molded it to hug the neck at the bottom of the scooter. Velcro straps will hold it on. There will be 3 of the green battery pack stacked on top of each other. The only downside is that you need to charge the extra battery separately. You can short the plug I added to run the scooter stock voltage at any time.

The battery in bubble wrap was just to test...
Its all still coming together, but decided to put this up in case anyone else was interested.


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By JonDon
Posts
#24759
Madyicstik wrote:
Mon Sep 14, 2020 12:01 pm
just wondering how did this little overvolting project turned out for you?
Works great up to 62V/15s. You can add an additional 5s4p battery pack all internal. For the 15s setup you connect a 5s battery pack in series with the main 10s battery.

3s4p battery in place of the built in charger
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2s4p battery in the front tube
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All batteries in series: 15s = 62V
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The 5s4p battery is charged with an extra 21V charger
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