I have been trying to understand if it is possible to connect two identical batteries in parallel (same: number of cells, manufacturer, capacity, CRate, usage).
I want to create a circuit to select between the battery pack (two batteries in parallel) and a DC input. With a relay and diodes I manage to select this.
However I'd also need to be able to charge the batteries. I don't know if I need to split them before charging and if they both have to be charged at the same time (so they both have the same voltage after charge). This part I could do with just a manual switch. And if I put them in parallel and introduce a diode in series with each battery for protection - this diode wouldn't let the battery to receive current (won't be charged).
Could anyone explain if it is possible to do this?
update: Ah ok. So in this schematic I don't need the ON/OFF charge button?