Intercell Currents in Assembly of Modules: Quality Control Considerations

摘要

Quality control considerations in battery fabrication with regard to intercellcurrents in an assembly of modules of thin cell, bipolar plate design connected in parallel electrically and in series hydraulically, are examined. The effects on battery performance of a statistical distribution in the parameters of the porous cathode structure, as well as unequal compression/expansion of the module and unequal number of cells in modules, are investigated. The discharge performance of modules with defective cells is also considered. Modeling methods are general, however, the examples used to illustrate pertain to the Li/SOC12 system.