Overclocker
10 kW
so i was planning on building a "hybrid" pack composed of 17s6p Samsung 26F 2600mah, paralleled to 17s6p Amperex INR18650 2200mah. the amperex cells are older and have a bit higher internal resistance
so i set them up with their own volt/ammeters to show independent readings, then wired them up in parallel to a ~20W resistor load. the amperex on the left (blue), pink samsung on the right:
as expected, the cell with the lower internal resistance puts out more current. but the interesting thing is that when the load if removed the cell with the higher voltage, depending on where it is on its discharge curve, starts charging the other cell:
PS these ammeters cannot show negative currents so it doesn't show the amperex cell actually charging
so i set them up with their own volt/ammeters to show independent readings, then wired them up in parallel to a ~20W resistor load. the amperex on the left (blue), pink samsung on the right:
as expected, the cell with the lower internal resistance puts out more current. but the interesting thing is that when the load if removed the cell with the higher voltage, depending on where it is on its discharge curve, starts charging the other cell:
PS these ammeters cannot show negative currents so it doesn't show the amperex cell actually charging