some weeks ago I made a decision to change motor and voltage used by my skateboard (24V previously and 48V currently). I have new motor, 4x 3S LiPo packs in series, 12S BMS, VESC, Charger for 48V battery. Everything is almost finished, but I wonder how to make a power switch. Previously I used car relay and it worked generally fine. Do you know any cheap solution for 48V setup? I haven’t found any 48V relays with size of car relay. I don’t want to spend to much money for dedicated switch specially for VESC.
I suppose that XT90 “loop key” is one of the cheapest for sure, but I would prefer to have button if I may
BTW. Previously i used car relay (12V on ‘connectors’ propably and 24V coil) for 24V setup. Could it cause restarting skateboard after some minutes of driving? I had a problem like that before and why it was happening. Temperatures on VESC maybe were ok, but this relay was a weak point.
Thank you really for any help
I will always recommend xt90s.
Simple, easy, cheapo, fail proof, not very aesthetic
If you still haven’t invested in the bms maybe you can look for I’ve with switch.
Thank you for answer. I have a BMS already (same like that for LiPos: https://pl.aliexpress.com/item/High-quality-36V-12S-43-8V-Lifepo4-battery-BMS-and-lifepo4-18650-or-Lipo-battery-with/32455728066.html )
If there won’t be any choices for me so I will use XT90 Antispark as you said. Power switch looked and worked awesome for now
It’s not just about voltage,it’s about amperage and wattage, if let’s say you use 100A discharge at 12S you’re looking at 5000+watts you need to put through the switch. I don’t know of any reliable enough switch to do that other than using a loopkey
Get the ones from @goldenHusky they are good, I has those on all my builds
@scepterr, there was 50A (limited using BLDC Tool) on 24V maximally earlier. A car relay I used was ‘high-current ready’ (on the box was 80A)
Now I want to limit to 30A on 48V.
No doubt it is hard to find cheap solution.
@Eboosted, thank you for recommendation. I will look at this in a moment and think about it
Oh my bad I thought you were doing dual motors for some reason, yeah for 1, 50A batt