Let us now summarize the main learnings from this module on Battery Technologies for EVs. In addition, we have prepared some exercises which would help you revise some of the important concepts you learned this week.

So, we learnt that Electrochemical storage devices used in EV must fulfill certain requirements, so that the EV can perform in a satisfactory manner. The key requirements are as follows:

• • • High specific energy to ensure a satisfactory range
    • High specific power so that drivers acceleration expectations can be met
    • Long, maintenance free lifetime
    • Safe operation under a wide range of conditions
    • End of life disposal has minimum environmental impact
    • High efficiency in charge and discharge cycles.

Furthermore we learnt:

• • • To interpret Ragone plots
    • To calculate the energy content and capacity of batteries
    • Atomic scale working of batteries About the trade-off between energy density and power density in designing batteries
    • About factors which determine the battery life of EVs
    • About the significance of the Battery Management System
    • About the application of Buck/Boost converters to step down/ step up voltage for power transfer between battery and motor in EVs