I'm trying to determine the max amp output of a battery pack that has 28 cells in it. To be more specific towards what I'm doing: I'm trying to size up a diode for the charge port; the battery charges at 29.4V max. On the website where I bought the e-bike it says it's a 466Wh battery. So, doing conventional math 466 / 29.4 = 15.85A. But, theoretically if a cell says it's rated at 7.56Wh, and the voltage drops from 4.2v to 3.7v, the battery would have to increase amps to maintain 7.56Wh. In my case my battery may be putting out 15.85A at 29.4V, but when the battery is low at 25.9V does it put out 17.99A? One website recommended using a diode that's twice the rating as the output to reduce the need for a heat sink. In this case I would be looking at a diode rated at 58.8v and 35.98A.
Update 10:44AM: I need a diode between the battery harness and battery charger; the charger gives me an error that says it's receiving current from the battery, so it's unwilling to charge the battery pack. It makes sense as it would be better to not have current flowing from the charge port.