They come all the way down to the size of a child’s hand on mini bikes, cheap but pretty well made, mini bike racing is a thing
Yep!
A kx65 or rm65 has a pretty small radiator. Other bikes to search would be Cr80 Ktm 50sx
Oil coolers are even smaller and would work I think.
straight distilled water, with water wetter (a surfactant) will work the best.
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Oil coolers have a wall that is too thick, an additive needs to be used if using water wetter or straight h2o
Like this https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F152375410510
Actually that weight aton in context of esk8,maybe a PC rad would be better for choice/cost, put a guard on it if debris could hit it
I think the first step before designing a cooling system is actually to just do temperature logging.
Get a bunch of temp sensors, an arduino, maybe see if it can log amperage draw and other stuff too.
Figure out how much heat you’ll be needing to move, and where.
Once you figure that out it will become pretty clear what radiator you’ll need, or if you’ll be able to rely on passive solutions like heat pipes.
Hey I’m in Phoenix. I actually had a mishap during the middle of the summer cause of the heat. Ran it till my 4.12 vesc till it overheated.
Normal mosfet can’t take the heat for shit. Direct fets make a huge difference though. I get much harder acceleration out of my focboxes even in cooler temperatures. Even on a single drive they fare well in the heat.
In my second build, I used metal enclosures in boosted board style with a vesc connected to one case with thermal paste. Haven’t gotten to test it in the summer heat though.
As for dealing with the heat yourself, keep moving. The wind really does help.
Also there was a previous thread with ideas for air cooling.
http://www.suntekstore.com/goods.php?id=10010855&utm_source=gbus&utm_medium=paid
Just put in battery box and vent out
Seems like cooling pipes zig zag across battery followed by a exposed PC cooling radiator with a small pump.
Those still really need to be used with a heat sink, it can’t pull away any more heat than it can radiate out.
And instead of buying a whole assembled product that you need to tear apart, you can just buy the peltier elements themselves for much cheaper.
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Better buy didn’t see those
Its one of those things where you need to know what the name of it is in order to search for it, but you can’t search for it without knowing what its called.
I’ve been planing a watercooled board proof of concept for a while (I used to wc pc’s back in 2004 before all the ‘kits’ arrived) this is vaguely what I was thinking…
for rad was thinking something as small as this (with custom enc. designed for airflow) https://www.amazon.co.uk/Alphacool-NexXxoS-Copper-Single-radiator/dp/B01A9L2NQI?th=1
for res and pump I think the only way to go is a combined unit
but I do have a couple of these lying around that I THINK might just survive the vibration
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watercooling is so bulky… so many components and very many failure points. i thought people like slender builds. Or are we talking about exchanging battery volume for all the required components?
I am with @Hummie on this one, passive heat pipes are awesome. You could even reuse some from old laptops or PC’s and have a sick looking kit without fearing a spill or pump failure or whatever else.
You know you can buy heat pipes Aliexpress.