Abstract
Zinc/bromine batteries were developed by Meidensha Corporation for load leveling under the “Moon Light Project” by Ministry of International Trade and Industry (MITI). One of problems in the bipolar cell assembly of zinc/bromine batteries is shunt current loss which causes not only a decrease in electrical efficiencies but also non-uniform zinc metal deposition. Computer simulations based on an equivalent circuit model were carried out for estimation of charge and discharge characteristics of a string of the 1MW scale zinc/bromine batteries. The round-trip efficiencies, the residual zinc metal after discharge, the stack currents and the terminal voltage were estimated. The effects of battery configurations and the fluctuation of cell parameters on charge and discharge characteristics are discussed.
