Technical Paper
Design of a High Voltage Lithium Ion Energy Storage System
2013-04-08
2013-01-0564
One of the deliverables for the GM/DOE sponsored EcoCAR2 competition involved the design and validation of an energy storage system (ESS) that could withstand 20g of acceleration in the longitudinal direction, 20g of acceleration in the lateral direction, and 8g of acceleration in the vertical direction with a minimum safety factor of 2, in the event of a crash. Rose-Hulman Institute of Technology (RHIT) elected to base their energy storage system off of A123 battery modules (7×15s2p) and components. The design included a thermal analysis for various drive cycles and a mechanical analysis of the enclosure built to support and protect the battery modules. The thermal analysis investigated passive cooling versus active cooling and, after identifying active cooling as the best strategy, an appropriately sized cooling loop was developed. The mechanical analysis involved the use of Siemens NX7.5 to develop CAD models for the ESS enclosure components.
