dSPACE eases battery management system development
July 5, 2013 by John Day
Battery Cell Voltage Measurement and Balancing system performs high-precision measurement and control of cell voltages in Li-ion batteries.
New rapid control prototyping (RCP) offerings from dSPACE are said to simplify the development of critical battery management algorithms by enabling precise, fast measurement and control of cell voltages for modern Li-ion batteries.
Quick iterations with maximum control
Battery management systems (BMS) interact with several vehicle systems such as the powertrain, energy management, vehicle safety, infotainment, etc. These systems cannot be developed in isolation, but require easy-to-use, in-vehicle rapid control prototyping (RCP) systems that allow quick iterations with maximum control capability. dSPACE is extending its RCP portfolio to fulfill this need by introducing its Battery Cell Voltage Measurement and Balancing system.
dSPACE said its new development system for battery management systems meets all the requirements for performance and safety when using high-voltage Li-ion battery packs during development.
The modular in-vehicle system can be assembled to create configurations of up to 200 battery cells, and 846 V total voltage. It provides ±3 mV measurement precision for each cell with a frequency of up to 1 kHz, regardless of the number of cells. This makes it possible to study the performance characteristics of various cell chemistries in a real-world environment.
Convenient balancing functions
The system features critical cell-balancing functionality to maintain individual cell charges at the same level, enhancing operational safety by preventing thermal runaway conditions and extending battery life.
In “manual balancing” mode, users have the option to balance cells individually or collectively, and at any desired time intervals. The “automatic balancing” feature allows users to conveniently specify target voltages and cut-off times, leaving them free to focus on the more important BMS algorithms.
Extensive error detection and alarms
Reliable safety measures are vital for handling the high voltage of a Li-ion battery pack. dSPACE’s Battery Cell Voltage Measurement and Balancing system provides extensive cell monitoring, error detection and alarm functions. These safety features include warnings about errors in hardware, communication and synchronization, cell overheating, isolation faults, and undervoltages and overvoltages at both cell and pack levels.