I was wondering where the connection point should be on a "massive" parallel block of lithium batteries. Let's say there is a pack of 100 LiFePo4 18650 batteries all spot welded together with nickel tabs (1S100P). Nominal voltage is 3.2V and total capacity of 100AH (each cell is 1000mAh).
Where would the best place for the positive and negative wires attach to the pack? Is 4 gauge wire sufficient for the "short" run to the connector termination (assuming a 1C pull on the pack)?
My thought is if you were to connect the positive and negative leads to the single cell closest to the exit that it would receive the most abuse with the load becoming less and less until the furthest cell is reached, but this doesn't really make sense as they are all a single cell now that they are welded together.