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Very Low Impedance Battery Architecture for Electrified Vehicles

Rolled-Ribbon is design and manufacturing method for battery cells that incorporates features of very short path length to bring current flow as well as heat from the cell and battery. Disc-shaped cells can be stacked to form a dense and efficient battery architecture for electrified vehicles. Relative to competing architectures, Rolled-Ribbon combines the low-cost winding and dimensional stability of the cylindrical format with fullytabbed, very short electrodes of a prismatic (that is replicated by winding). The very short electrode of the cells and the quasi-bipolar arrangement approximately lower cell structural impedance (ACIR) by 50% and DCpulse impedance by 25% for Li-ion battery. As such, Rolled-Ribbon overcomes the power/energy tradeoffs faced by competing architectures. Specific energy is increased with larger cells and high power is maintained.