Recent content by cjorgensenmd

I'm looking into anti-spark switches now because the spark is not as big of a problem, but the inrush current might be. Both for the BMS and the controller. It looks like Maytech makes a few, though maybe a DIY option would be better.

My BMS has bluetooth and a common port, so the short was between B- and C-. I will have to wait until I get home tonight to try those current tests you mentioned. It's interesting that you mentioned charging capacitance current. I used to have a Kelly controller that bit the dust. (bad hall...

I've examined all the balance wires fairly thoroughly and have found no evidence of a short, but when I rebuild, I am going to be taking extra special care to isolate and shield all the balance wires per your suggestion. I haven't found anywhere else that would suggest a short and it's honestly...

Ok so I tore the BMS apart and discovered one of the mosfets was blown and shorted out. So that would explain a lot except why did the mosfet blow? The only thing I can think of is possible mechanical compression when I was putting the new battery case top on. Anyone have other thoughts? Is...

So before changing the top on the battery, it had been sitting unused at about 54v. The smart BMS came with a small digital switch that is supposed to tell the battery to turn on or off. Either enabling or disabling the output. My daughter had previously ridden on the battery several times...

A few months ago I built a 14s6p battery pack from Samsung INR21700-40T cells. I recently took the top case off in order to install a new top with a VESC and 48v->12v converter. Everything was going great until I connected a voltage display. It should not have shown...