An electrical battery is a combination of one or more electrochemical cells, used to convert stored chemical energy into electrical energy.
Batteries form the main storage component for energy storage systems with a huge range of technologies and chemistries available from single lead acid, to more exotics such as Li-Ion, Ni-Cd sodium sulphur (Nas) and Vanadium redox flow.
The prime function of the Battery Energy Storage System (BESS) is to provide spinning reserve in the event of power plant or transmission line equipment failure. For these systems rechargeable batteries are used to store electricity in the form of chemical energy. ABB so far has two different kinds of BESS equipped with the corresponding converter.