Schematic representations of different battery pack topologies: (a) single cell; (b) parallel connection of two cells; (c) series connection of three cells; (d) parallel connection of two strings of three serially connected cells; (e) series connection of three modules consisting of two cells connected in parallel. [...]
The individual topologies are classified into passive, hybrid, and active PFC rectifier systems. With the recent advancements in semiconductor technology, active PFCs are widely used in EV charging stations. Depending on the power level, both single-phase as well as three-phase topologies are used in EV charging stations.
The ultimate choice of a power topology boils down to the intended use case of that specific EV Charger namely the targeted power levels, efficiency & power density targets to name a few.
Simply, connect both of the batteries in series where you will get 24V and the same ampere hour rating i.e. 200Ah. Keep in mind that battery discharge slowly in series connection as compared to parallel batteries connection. You can do it with any number of batteries i.e. to get 36V, 48V, 72V DC and so on by connecting batteries in series.
The pack configuration directly imposes specific charger requirements, such as charging voltage and current. In addition to these factors, inside a battery-powered device, a charging source must be identified to replenish the battery in a reasonable amount of time. Typical power sources include dedicated charging adapters and USB supplies.
Six (6) batteries each of 12V, 200Ah are connected in Series-Parallel configuration. i.e. And then the pair of these batteries are connected in parallel i.e. two parallel sets of three batteries are connected in series. i.e. Set 1 = B1, B3, B5 = Series Set 2 = B2, B4, B6 = Series And then, Set 1 & Set 2 = In Parallel.