摘要: |
Researchers at the University of Idaho have been investigating the possibility of using lead acid batteries in electric and hybrid vehicles for more than ten years, and the funding from UTC Program helped support this continuing effort. The lead acid battery uses horizontal plates and improved conductor structures to provide high power discharge capabilities. Our first task was to design a baseline cell to provide 35 w-hr/kg at the two-hour discharge rate, 200 w-hr/kg at 100 percent state of charge (SOC) and 100 cycles at 80 percent depth of discharge (DOD). This initial design was developed with the expectation of establishing a cell development program with battery manufacturers. The baseline cells, as developed, could serve as the foundation for the future development of advanced cells and eventually, the commercialization of the REHEV. We used conductivity and diffusion computer models previously developed at the University of Idaho to evaluate the performance of advanced cells having high performance plates. These plates had various conductive and non-conductive additives incorporated into the positive paste to improve energy performance. Our models show that, in theory, we should be able to increase the energy performance of the baseline cells from 30-35 w-hr/kg to 60-65 w-hr/kg. |