Hey everyone, I’m planning to rebuild my dual motor Evolve GTX battery pack. The original pack uses flat Li-ion pouch cells (pictures attached), and I’m replacing it with a 10S4P 18650 configuration.
Planned setup:
10S4P
Molicel P28A (2800mAh, 35A)
Pure nickel strip 0.2mm × 10mm
Spot welded connections
Stock BMS
Stock ESC and everything else remains unchanged
This would give me roughly 11.2Ah (403Wh), which is slightly more than the original pack.
I 3D scanned the GTX enclosure to check fitment. It looks like I may need to stagger the cells slightly (up/down orientation) to make them fit within the stock case. If necessary, I’m considering designing and printing a spacer to slightly extend the battery case downward for proper clearance.
Before I purchase the cells, I wanted to ask:
Does anyone see an issue running P28A in 10S4P with the GTX BMS?
Are there any other cells you’d recommend instead?
Do I need to check every battery, or since I’m getting it from a reliable source its fine?
Has anyone here rebuilt a GTX pack and kept the stock BMS?
Everything else on the board will remain stock. I’m not changing voltage (still 10S).
This is the way. Go for higher capacity cells, you will need the spacer anyway.
I made some good experience with long-term-elastic glues for spacera. Since the enclosure is bolted to the deck you could even use silicone I would think. Just make sure the “glue” is and stays flexible and ist also a good seelant.
I had a video as well, but this fits in the enclosure so much nicer than a 10s4p 18650 and you don’t need to modify the enclosure, just add the spacer.
there is zero reason to go for 18650, unless you are getting the cells for free
If on the off chance you’re local, as in New Zealand, I’ve made a mould for laying up glass enclosures that hold 12S8p 18650 and are four flexible segments. Requires the deck to get a little extra sanding on the bottom, followed by glassing.
Did my first GTX expecting it would be a waste of time, but it’s turned out to be my favourite board, reliable AF, and extremely cheap to own.
Okay, thank you so much, I’ve been convinced to make a 10s3p battery pack from 21700s. Where did you get those connections for the batteries, and it looks like 10–12 AWG silicone wire to connect them?
Okay, I definitely will need to make it water proof or at least make it water resistant. Ill see what type of silicone my local homedepot has. Thank you!
Unfortunately I’m over here in New York. But according to glyphiks its possible to use the stock enclosure with 21700. But i would love to see some photos of what you have done for your enclosure!
These are my two, I did another for a mate. I bought 3000 used 18650’s, hence double stacking those instead of using grown-up cells like all the cool kids. When I made them, I was looking at eboosteds but the freight was expensive and I can cheaply fit 1kwh in these - something I couldn’t do with off the shelf options.
On paper these boards should be mediocre, but that one with the white wheels is my favourite, board I own. Neither of these are slow, and the split angle rebated rear truck has helped too a little. I think dkp get bad rap due to sloppy pivot cups mostly. I print my own from TPU and make them a little tighter than stock, they’ve been surprisingly good.
