Enhanced Cell Designs for Improved Internal Heat Transfer for High Rate and Power Capable, Large-Format Batteries

For this SBIR, InvenTek provides its unique disc-shaped Li-ion cells to meet the high-rate requirements of a shipboard battery. These cells consist of short electrode (13mm tall) and massive connection to cell terminals to boost cell power and internal heat dissipation. The anisotropic thermal properties of conventional cylindrical and prismatic cells create thermal management problems for the Navys shipboard battery objectives. InvenTek large-format cells (15-35Ah capacity) will demonstrate the improved heat dissipation that is required for high rate (at least 10C-rate discharge) performance to improve battery safety and life. As requested, this unique cell architecture provides a hardware solution that can be applied to most all Li-ion cell chemistries. InvenTek also supplies a number of the large disc-shaped cells for specialized Navy testing to evaluate safety and thermal properties. Phase I develops a prototype cell design for a shipboard battery demonstration in Phase II.