Although the answer might be easy, I am a newbie and want to ask before burning my house down.
I've seen a lot of battery packs tutorials. Now I have to use my knowledge to connect two 7S packs in parallel. Now I am worried that my tools aren't the best and the voltages of the two packs might be different and cause a big current flow that will destroy something in the dual BMS. I want to safely equalize the voltages between the packs. Everyone mentions how easy it is to balance a 2 cell battery but I didn't see anywhere how to balance two xS batteries. I am thinking of a resistor across them outside the bms and leave them until they equalize, what are your suggestions and is this a good idea?