The preliminary study into an innovative approach to determining a battery´s full charge capacity

Physicists and electro-chemists have attempted to define a battery and all its characteristics as an equivalent electronic circuit. To take into account every nuance of a battery´s charge and discharge qualities, as well as its aging characteristics, the equivalent electronics circuit model becomes quite complex. When aging characteristics such as plate degradation, recombination efficiencies and temperature degradation are taken into account, not only does the equivalent circuit become immense, so to does the uncertainty between the real model and the analytical model. However, when a battery reaches its charging equilibrium while attached to a constant voltage DC source, the equivalent circuit can theoretically be simplified to a few definable components. The equivalent circuit of a fully charged battery, attached to a constant voltage DC source, can be theorized very closely using proven chemical and physical correlations. This paper presents an example of how a fully charged battery, while attached to a constant voltage source, can be defined nondimensionally and analytically. This paper further presents an innovative and practical method of measuring a battery´s capacity by using this nondimensional and analytical definition as a correlation of easily measured parameters. This paper presents both an analytical proof as well as preliminary experimental data to verify or disprove this theoretical correlation. This paper proposes a preliminary method of utilizing the ´battery full-charge capacity´ correlation to produce a simple, accurate and easy to implement ´state of charge´ monitor