High Energy Density Li-ion Battery with Enhanced Safety, Durability, and Sustainability

Period of Performance: 01/01/2011 - 12/31/2011

$150K

Phase 1 SBIR

Recipient Firm

Inventek Corp.
320 Willow Street
New Lenox, IL 60451
Principal Investigator

Abstract

Conventional Li-ion cells/batteries for hybrid and electric vehicles have difficulty meeting USABC goals for performance/cost that are required for commercially-viable EV. The prevailing large format pouch/prismatic has the advantage of low packaging weight/volume, 10% at cell level, but is doubled (100% increase) in transitioning to the battery. Aside from the reduced energy density (accommodation for thermal management), pouch/prismatic has drawbacks in durability (internal gas buildup degrades performance) and cost of battery assembly (extensive weld assembly with a fragile cell packaging). Li-ion batteries must be more cost effective for broad adoption, generally 50% lower cost prospects, to realize promise of significantly reduced oil dependency. InvenTeks Rolled-Ribbon Technology is evolved for high energy density to show competitive advantages in comparison to the prevailing pouch/prismatic cell packaging. A Rolled-Ribbon cell, sized for EV, also has low packaging weight/volume (10%) to rival the pouch/prismatic cell packaging. Further, a stacked-cell battery with Rolled-Ribbon cells (adding only 10% weight/volume over cells) doesnt require a welded assembly. This configuration provides outstanding battery thermal management. With comparable Li-ion chemistry, battery-level energy density for Rolled-Ribbon is doubled. To further tackle the EV battery cost issue, Rolled-Ribbon cells rejuvenated via OnTo Technology processing may cut life cost in half.Commercial Applications and Other Benefits: Rolled-Ribbon battery sees primary application as in hybrid and electric vehicles. Other applications involve smart-grid as regulatory power storage, solar/wind energy storage, backup power for data centers, etc. Affordable hybrid and electric vehicles can reduce the USAs dependence on foreign oil, but also reduce air pollution and greenhouse gas emissions. The US needs to compete in the world market for green energy and industries. A high performance low-cost battery will support these critical objectives