jus have someone build you a pack
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true that, but more in a low work check cells, replace, done style
that thing that 12 screws per module (they were 3d printed and therefore not that easy to screw in)
it was hell screwing it with an unpowered one
iâm mostly talking about the cells that could need fixing
Just get a professionally built pack and save yourself the worry.
lol
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yeah got that thing too C4 and the small chisel tip. had it for years!
Screen is starting to say goodnight.
Im overvaulting that thing to 27 volts (might be whyâŚ) with a mean well power supply. and some thin 20 awg silicone cables.
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Hey guys, how hot itâs too hot for a Stormcore?
I have a 100D and I think Iâm getting to itâs limit as Iâm reaching 55-60°C.
The thing is that i donât want to push it harder (i could) as it is enclosed in a box without a heatsink.
Do you think mounting a heatsink to the stormcore inside the box (no external airflow) will make a good difference?
Or should I take the time to integrate a heatsink on top of the box?
(A benefit of not integrating it in the box itâs waterproofing, and cheapeness, as i would have to buy a cncâd heatsink for putting it on display, but i could just take an aluminum block make 4 holes and use it as an âinternalâ heatsink.)
80° is hot, ~90 is the ceiling, for me at least if i were to ever bit that
youâre fine at 50-60
stock values for temp cutoff is 80 start 100 end, so itâs probably something else limiting you
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A thermal mass like a chunk of aluminum mounted to the esc will wick heat away from it, but not remove any heat from your closed system. If youâre getting short spikes of high temp reported on the Stormcore, a block of something with high thermal conductivity will smooth out those spikes.
However, if your temps tend to climb to 55-60 and stay there, thatâs probably roughly the temp of your entire enclosure. Youâve saturated everything inside to that temp. Adding a thermal mass will do nothing to reduce that, only slow its onset. You need to reduce temps with something like a heat sink mounted with access to colder air. Thereâs no getting around that. If this is the case, you should also be worrying about any other electronics, battery, etc inside your box. >60C heat accelerates cell aging and increases safety risk.
You can still seal around a heatsink to maintain some level of waterproofing (butyl tape, silicone adhesive, etc). And your heat sink can be a simple block of aluminum, no fins required, although that would be more efficient. Actually the heatsinks we tend to use are pretty poor as far as surface area, fin #, etc go. Theyâre mainly just pretty blocks of aluminum. Look at legit PC builds - their heatsinks have hundreds of ulta thin fins and they agonize over perfect mounting techniques.
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I mean, Iâm not being limited by the stormcore, but i donât want to push it harder in case i get it too hot. But If stock cut off itâs on 80°C Iâm alright for now⌠I anyways donât want to get that hot as the plastic enclosure might deform.
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I think LaCroix made sure this doesnât happen until youâre far beyond the limit. ^^
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Idk which specific mounting etc it is (see Justinâs link above for more detail) but this is the rough region of the site. These guys charge the lowest shipping/ordering fee and ship stuff insanely quickly out of the suppliers operating in Ireland so I assume theyâre similar in brexitland
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I know! But i was wondering that if I add enough thermal mass i will maybe not be able to get the esc to 60C° in 18 mins of riding hard, and instead increase that to half an hour or more. As most my rides arenât very long.
Thatâs good to know, i do get spikes as i live surrounded by hills so when Iâm going 50kmh uphill temps go up rapidly.
Currently nothing to worry about besides the reciever as the esc itâs in an independent box.
I donât really know what my temps tend to be as i donât have telemetry recording (yet) so if I have done a hard hill or something i check the vesc app to see how high the temperatures are and slow the pace down. Iâve never reached the thermal cutout.
Slowing it down doesnât seem so bad if I can get enough runtime, the point is not feeling fear of burning something when doing a series of uphill runs.
Youâre right, but i think theyâre not bad as thin fins are easily bendable in case of a crash or just putting your board upside down for maintenance.
Thanks a lot for the help man, i guess I will be going for an externally mounted heatsink.
Here in Seville we get like 40-45°C wether in the summer so it isnât going to get very cold air but i guess at least something itâs good.
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Iâm sure of that! But im not worried about the stormcore plastic itself, but about the plastic case i bought from Amazon where the stormcore itâs stored.
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The stormcore app does recordings.
you should be good. it starts to slowly throttle down if you get it above 80C. So climbing all the way to the hard cut off at 100 should not be possible when riding really.
If you feel uneasy by all means play around with heatsinks. how effective the different options are idk. but id imagine fresh air would be way more effective.
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If I remember correctly, it is only for iphone 
Iâm currently waiting on an iremote and a ilogger form @WavRX which will solve all my recording needs!
Oh that itâs cool, then itâs kind of like the battery cutoff⌠i was also scared because I had a cutout going full throttle bc of my motor sensors and I didnât want to test my luck with a temperature cutout.
Btw, do you know if the temp sensor got fucked for any reason, and suddenly marked something like 120°C (even though the vesc isnât at that temperature) will it cut power Inmediately?
Just bought a good priced infinity heatsink, i will be installing it when ir arrives so I will be ready for the hot summers we get here in Spain.
I have also thought about carrying a cold water bottle in my backpack just in case i get into a very very hot situation 
Does anyone know if the LLT smart BMS forgets settings if you disconnect it from the battery?
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it does not
@futuremotion take notes dumbasses.
repeat after me
BMS FIRMWARE DOES NOT BELONG ON VOLATILE MEMORY
/rant
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what sort of performance difference should I expect if I swap out 2x FS 6384 170kv motors with 2s FS 6354 140kv? keeping the same gear ratio of 2.78 and at 12s and 50 battery Amps and 100 motor amps per motor.
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You will get very short runtimes as the motors will get very hot very fast!
They have less mass so they heat up faster, also, youâll be facing less torque per amp, as the stator and magnets are smaller.
I donât know how much the torque will change given the kV change but 100 motor amps itâs too much for such small motors
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