I can easily run a test at up 200W dissipation using my rather clever electronic load (Rigol DL3021) - but that’s only 10Amps at full voltage (22V). I’ll do that first to confirm that these cells do have something close to their rated capacity.
I could risk taking more current out of the BMS connection on just one of the cells, but the BMS wiring may not be up to that. If I do that, I can test up to 40A discharge on a single cell (and have some smelly cabling to contend with!). Or I can break the pack apart and get direct acces to the individual cell terminals.
Then, I have some high power (500W) resistors that I can configure to take 700W out of the whole pack, but that’s still ‘only’ 33Amps. I have a fluke thermal imager than can show me where hot spots are developing.
From then on, It gets tricky trying to take out 150Amps – that’s 3.3KW of power to get rid of!
What I need is a big cooling fan and something that can take this load…….!!
If only Paul Pdwhite would deliver my Christmas present of a Build 5 paramotor BEFORE christmas!! Hows it going Paul??