I'm a new guy to the whole EV scene. I've started my journey ~2 months ago when I purchased an 'used' Super Soco TS (it had 2km on it).It's been a blast to drive, I really like the looks and the handling, however the acceleration and topspeed are starting to bug me more and more especially when the battery voltages starts dropping... So I'm planning on doing something about it.
I'll try to place all required info here, if something is missing or unclear just let me know.
If I'm posting in the wrong thread let me know.
I'll update here as well regarding any progress with some pictures / video's (if anyone would be interested).
- Me: 72kg, 178cm, from the Netherlands.
- I only drive onroad and it will mainly be used as a commute 3 times a week.
- The commute is 40km on flat terrain. (I do manage this distance with the current 60V26A battery)
Good, Fast & Cheap
Okay, some more details then
- Range: Min 50km (The commute distance should not be an issue on a single charge and would prefer to keep the battery between 20% & 80%.)
- Top speed: 80kmh (will not drive that a whole lot, but would be nice if I can reach it)
- Commute speed: ~60kmh
- Budget: Depends. Generally I aim for decent quality/cost. So not top of the line but also no complete rubbish.
- Several 'driving' modes like I currently have
- Alarm (sound + wheel locking)
What did I already find out?
I've tried to do my homework as good as possible. It's a really interesting little world and I've loved reading reviews, build thread and watching video's. What's I've come up with so far (also thanks to flippy for his help):
- Motor: 17" QS273 4KW v3 (4KW = max allowable KW in the Netherlands)
- Controller: Sabvoton 72150 (not unlocked), Kelly 7245N, Votol EM-150/200
- Battery: 18650 20S16P based on Samsung 29E7 (should make 72V/46A which makes 3.3KW)
- BMS: unknown (bluetooth would be nice in order to check voltages for unbalance)
- Charger: unknown (charging up to max 4.1v) and slower charging is no issue for me (slower = better for the battery)
- Converter: unknown
- Spotwelder: Sunko something
- Tyre: 130mm Continental / Pirelle / Dunlop something (the 273 wants 120-130 and stock is 100) and wider looks better, going even wider requires a new rear arm
I'm open for all feedback. So if this setup is overkill, the quality of the components is rubbish or whatever please let me know. If you have alternatives I will definitely be open to that since I'm still a n00b.
Sabvoton vs Kelly. I'm reading more negative things about the Kelly and I do like the looks of Sabvoton better (/care).
I'm also contemplating about also using a new display since I don't want to overcomplicate stuff with keeping the old display and the Sabvoton can be ordered incl. a screen. https://www.aliexpress.com/item/4000215320240.html
- Are the Samsung 29E7 okay? (they are one of the cheapest and perform well according to some test I've seen here)
- Honeycomb structure layout because that will give the biggest density and easiert to build pack within this space (150x180x330mm)
- 2 Stacks of 10S16P.
- Nickelstrips (20mm x 0.2mm) https://www.aliexpress.com/item/33034381554.html
- Spacers: https://www.aliexpress.com/item/4000158813837.html or https://www.aliexpress.com/item/32847248791.html
- Soldering the balancing wires between the cells not on them
- Adding busbars on the + & - over the total length with 6/8AWG wires (soldering before spotwelding)
20S 72V 150A (same port or parallel port)?
- Yzpower 84V 5A https://nl.aliexpress.com/item/32847999146.html
- Yzpower 84V 10A https://nl.aliexpress.com/item/32848536207.html?? 84V 12A
Anythign else i'm forgetting
Rough estimates of what I'm guessing the cost will be so far:
- Motor: €600
- Controller + display: €400
- Battery cells: €800
- Battery BMS: €150
- Battery Misc: €200
- (rear)Tyre: €100
- Transformer: €100
- Charger: €150
- Spotwelder: €150