Modeling of Lithium-Ion Cell Performance

Quallion LLC proposes to continue development of its reference electrode technology into a commercial scale prototype and partner with the University of South Carolina to develop a life prediction model for cells cycled at high depths of discharge. In Phase II, Quallion will refine its reference electrode design based on lessons learned in Phase I, incorporate a reference electrode into commercial satellite cell designs, and build prototype cells with reference electrode for testing to validate their performance and to generate data for the modeling effort. Quallion will also build cells using the current 72Ah commercial cell design utilizing the new Gen2 chemistry and perform life testing on these cells at 60% DOD. The modeling effort will evaluate two methods of predicting capacity fade, one based on operational capacity checks and the other on on-line monitoring of parameters during cycling. Parameters will include data gathered by the reference electrode. Phase II will develop long-term cycling data on test regimes and further develop the model capability for prediction of cycle life under different test regimes and DODs.