A system or method for individualized coolant flow to each of a plurality of energy storage devices 10 housed in an electric vehicle. Each energy storage device 10 includes a heat exchanger 11 coupled in thermal conductivity with a segmented battery module 13. The segmented battery module 13 includes battery cells 13B and sensors (13C, 13D, and 13E). The heat exchanger 11 includes an HE flow controller 11C. Individual sensor information for each energy storage device 10 is collected via the BMU 13A of each segmented battery module 13. The charging SCC 22 uses this individual sensor information to calculate the HE flow rate of coolant pumped through each energy storage device's 10 heat exchanger 11 to cool the battery cells 13B of the energy storage device 10. Coolant delivered to the heat exchangers 11 is cooled by an external cooling unit 21 of a power source 20 during each charging session.