Flipsky 75100 FOC 75V 100A Single ESC Based on VESC® for Electric Skateboard

Righto I’ve got mine as well so I’ll post a couple of pictures and observations, but I’ve got nothing to contribute on performance other than these until I’ve had a few weeks to get used to them

First interesting and weird part; the MOSFETs are mounted on a chunky heatsink block so that’s nice. However, TO220 packages usually have their Drain connected to the metal tab, and to avoid shorting these out they’re mounted with a layer of kapton tape, and plastic washers. The screws seem to be metal but I didn’t think too much about it while it was open, it’s on my list of stuff to check when they get opened again (and I can’t find info in the data sheet for these mosfets to see which terminal is connected to the tab).

There’s a decent amount of thermal paste between the back of the heatsink and aluminium extrusion casing, and they’re screwed together. There’s also an NTC mounted pretty well into the heatsink, connected to the PCB here

Speaking of that housing, oh boi. There are clearly slots that the PCB is supposed to slot into, but it’s only slotted in and supported in any substantive way on one side. The other side is screwed in to be fair (as mentioned above, heatsink to housing) so it’s wedged pretty well into the opposing slot but I’d like some other opinions on this.

I don’t personally think the soldering is that bad tbh. I do not like that the bus bars are exposed, it would likely take a pretty catastrophic mechanical problem for them to contact the enclosure, and it is anodised, but it doesn’t feel great. Again, other opinions wanted.

Lastly on the dangling capacitors; it’s not as bad as it looks? It’s not good, but the legs are quite unusually stiff and covered by heatshrink or some sleeve. Also at least one or two of them rest on inductors (can’t remember if it’s all, will check at some point). I was thinking of printing a sleeve or holder of some description, and silicone-ing them down.

7 Likes