MEGAWATT Cooling Fan Questions
It's cooling fan modification time. The louvered cutout on the aluminum case has 4 spot-welds in the hub. Any idea why? I am planning on full-circle cut-out the holes on both Megawatts, then use...
Forum Discussion
Chris Bryant wrote:
A couple of comments- why no liquid cooling? If case space is a concern, liquid would certainly help, moving the radiators outside.
As to the whole design-Two-stage charging presents a challenge to engineer when flexible voltage plus flexible time is involved.
This is taylor made for an Arduino- depending on the precision you need it would be trivial to measure current, voltage, temperature and whatever else you need to control a digital potentiometer controlling the megawatt.
Whose budget is this coming out of, yours, or mex's? :h
I bought a VW e-Golf last week.. 24.2kwh of lithium power. VW's clever engineers didn't see fit to water cooling either on the battery pack or the 7.2kwh chargers, but I assure you, it will suck down 30 amps of 240V for 3 to 4 hours to take the battery pack from empty to full, air cooled.
What is really bad for that battery is sticking a 50kwh DC charger and blast charging to 80% SOC in 20 to 30 minutes, with no cooling system present. Really, really not good for a very, very expensive Li battery pack.
A regular old EVSE for me, thank you.
DIY EVSE system for EV's.
