The goal is to build a 200 V Lithium-ion battery pack using 21700 cells.
I am trying to make a design decision on lithium-ion battery pack architecture for an electric vehicle and it boiled down to below two options:
Approach 1: 100 V lithium ion module on the left side of the vehicle and another 100 V Lithium ion module on the right side of the vehicle with high voltages wires connecting in series to stack the voltage to 200 V.
Approach 2: A single battery rated for 200 V.
Would like to prefer approach I from dynamics point of view. Barring the vehicle dynamics discussion, is there a concern in terms of battery performance and losses to worry about between "Approach 1" and "Approach 2". Is there an added complexity to think about BMS communication or not really?
Each battery pack will of course consider of lithium ion modules and the overall number of cells in the battery are based on energy sizing requirements of the vehicle.