u/PEV_Pro — reddlx

Hi all,

Im able to build custom hv batteries, and I can design 3d models and print them with my 3d printer.

Im wanting to vesc my onewheel+ XR and I wondering what the safe maximum voltage would be for the stock motor. Im looking for a substantial power upgrade with 25+ miles range (200lb).

I know that if I want to use 21700 cells, ill have to make a new battery enclosure which im totally willing to do.

Affordability is also a concern. I have around $300 budget for everything I need for the vesc conversion (excluding battery and bms cost).

What kind of vesc controllers should I consider?

What voltage should I run?

What would the battery config look like? 20s?

Thanks!

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u/PEV_Pro — 11 days ago

▲ 85 r/18650masterrace

Thank you guys! With all the helpful tips, I was able to build my battery relatively easily without any hiccups.

All thats left is some kapton tape, fishpaper and shrinkwrap.

u/PEV_Pro — 13 days ago

▲ 22 r/18650masterrace

I decided to try the copper nickel sandwich technique for welding batteries, and i can get a very secure hold. My main concern is the heat generated and if it looks like it would be too much?

The cells used are dead cells that i used for practice.

Second photo is the tear off test.

Im basically maxing out my awithz uf20b spot welder.

u/PEV_Pro — 14 days ago

▲ 20 r/diybattery

u/PEV_Pro — 14 days ago

▲ 4 r/batteries

Im reusing cells from a 10s2p pack, and i noticed some electrolyte leaked unto the fishpaper. I cant visibly see where the leak it on any of the cells.

If I measured internal resistance and voltage, would the leaky cell be immediately obvious? Are there any good ways to test for that?

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u/PEV_Pro — 16 days ago

▲ 6 r/batteries

Hi,

Im replacing the cells is multiple 10s2p packs, and im not sure if the bms from those packs work. If they don't, i would need to replace the bms with something off the market. I cant find any 10s 35a bms anywhere! Especially with this form factor.

I don't need a Bluetooth bms. Just something simple and inexpensive.

I did find a 30a bms, but im uncertain it would be wise to use in battery that would be used for esk8. Esk8 in question is a meepo v3.

Third picture is the 30a bms. (It also seems very light compared to the 35a bms which makes me question the quality.)

I appreciate the help.

u/PEV_Pro — 16 days ago

▲ 1 r/wheel

Custom battery on onewheel XR hw 4210 sw 4216?

Hi all,

Im planning on buying a used onewheel and upgrading the battery with better cells. For this onewheel xr configuration (hw 4210 sw 4216), what would be needed to be able to put in a custom battery? Could I re-use the bms on the original battery? If I wanted higher capacity, what would I need to do?

Im looking for the cheapest DIY solution. I have all the tools and skills necessary. I've built lots of custom esk8 battery packs, but I need a bit of help navigating the "owie" chip.

Appreciate the help.

Edit: sw version is 4165 not 4216

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u/PEV_Pro — 18 days ago