Worldwide the markets are demanding battery systems with higher energy densities, longer lifetimes, and lower costs, but without compromising safety. Consequently, the efforts to design suitable battery management systems according to these requirements are getting higher. To help developers, engineers and researchers worldwide, Fraunhofer IISB has established the free and open source Battery Management System (BMS) development platform ”foxBMS” (www.foxbms.org).
The second generation of the foxBMS platform is used for the demonstrator vehicle of the SELFIE project (see Figure above). The results of the Hazard analysis and risk assessment (HARA), the Design Failure Mode Effects Analysis (DFMEA) and the safety analysis conducted within the SELFIE project are incorporated into the system architecture, as well as the according documentation and development processes of foxBMS 2.
Optimized battery performance is achieved by accurate battery state estimation algorithms for state of charge (SOC), state of health (SOH) or state of safety (SOS). The project goals of SELFIE are enabled by transferring this knowledge into optimized operating strategies.