Reliable, Safe, Lithium-ion Battery Enabled by a Robust Battery Management System Navy STTR FY2015.A Sol No.: Navy STTR FY2015.A Topic No.: N15A-T001 Topic Title: Reliable, Safe, Lithium-ion Battery Enabled by a Robust Battery Management System Proposal No.: N15A-001-0123 Firm: Texas Research Institute Austin, Inc. 9063 Bee Caves Road Austin, Texas 78733 Contact: Rengaswamy Srinivasan Phone: (240) 228-6378 Abstract: Texas Research Institute Austin (TRI/Austin) teaming with Johns Hopkins University Applied Physics Laboratory proposes to develop a robust battery management system (BMS) based on technology that a) non-invasively maintains the internal states (SoC, Rint, Tint and Ecv) of each cell in the battery well within the safety limits at all times, b) establishes cell balancing and Ah-capacity monitoring, and c) uses external sensors to monitor the battery's ambient temperature, humidity, pressure, and arcing. Of these nine sensors, the four internal state sensors have been developed at APL over the past four years. The arc-fault-detector is also an APL-developed sensor used extensively in the US Navy surface ships and submarines. For the four external sensors (ambient temperature, humidity, pressure and cell balancing), COTS technology will be used. The BMS will be built and demonstrated in steps with the sensors for monitoring the internal states being integrated in the Phase I Base and three of the external sensors and Ah-Capacity will be integrated into the breadboard BMS in the Phase I Option. Cell balancing and arc fault detection will be integrated in the Phase II effort. Benefits: The development of a robust battery management system for Li-ion batteries will result in the increased use of Li-ion batteries because of increased safety, faster charge capability, decreased fire potential, and improved cell life. The robust BMS will make the Li-ion battery a more cost effective energy storage system than the legacy Li-ion BMS because of the ability to use the Li-ion batteries more efficiently due to more rapid charging, internal temperature control preventing chemical degradation of the internal components, and the ability to use more Li-ion batteries for electrical needs in sensitive systems. Return