PROJECT TITLE :

A New State-of-Charge Control Derivation Method for Hybrid Battery Type Integration - 2017

ABSTRACT:

The hybrid of ex-transportation and typical new battery system integration has started gaining interests within energy storage systems as variety of electrical vehicle on-road will increase. Every module among such a system might contains batteries with completely different charging/discharging rates, characteristics and additionally completely different nominal voltage levels. Control of these hybrid batteries within the identical system is more challenging compared to standard battery management systems, that mainly house the homogeneous battery system. One of the key problems is how to control the state-of-charge trajectory of the hybrid modules to maximise the investment on the new hybrid battery system. To cater this downside, this paper brings a replacement rigorous derivation methodology of state-of-charge control primarily based on converter sample time. The proposed method generates desired current reference in each time step to distribute the power among hybrid modules such that their discharging or charging trajectories finish at the identical time. This technique makes positive that the energy delivered/absorbed from each cell in a very uniform manner maximizing the overall lifespan. Detailed derivation of the present sharing method and appropriate module based mostly adaptive bidirectional control design has conjointly been presented. Modeling, analysis, and experimental validations are performed on a three-module-primarily based grid-tie hybrid battery energy storage system prototype to validate analysis.