300A current. The capacity is 45,000mAh. The config has 15 in parallel. I would be pulling 200A for about 13 minutes or so before the cells reach their minimum voltage and the bms shuts it down300A or Ah?
Samsung might have a chart on individual 30Q cells heat of cell under various loads. Assuming there are enough in parallel I would think not much of a heat rise.
a 14s100p 30q battery would be a 300AH battery. A 200A load would be a .66C load. How long would you be pulling 200A out of the battery?
Ah I see so using that formula for a 13s15p pack, I get the following:Never really thought about it, but my guess would be the sum of:
1. NumberOfCells * IR(20mOhm?) * CurrentPerCell^2, so using floydR's values: 112 Watts of heat
2. All wires and fuses that will heat up under high loads, using same formula ( Power = Resistance * Current^2 )
Only current matters, not voltage. Thus you'll want to maximize voltage and minimize current to reduce heat losses.
Thank you! So for my analysis I will probably take the second formula since it factors in how much current each cell contributes to the load and run the CFD based on the 693 watts of heat which is probably more accurate than taking the max discharge current for a 30Q cellYes. As you can see, going from 20A -> 13.33A reduces heat output to less than 1/2!
Not entirely sure about the actual IR of the 30Q. Some sites state as low as 12mOhm, others state 40+mOhm.