Battery stacks with many cells per string require sophisticated balancing hardware for capacity maximization, safe operation, and extended lifetime. This paper proposes a simplified control architecture for redistributive battery balancing topologies. A high level controller defines the link currents to be actuated by flyback DC/DC converters. Linear transformations are used to rewrite the balancing problem as a regulation problem that can be solved with a saturated LQR. To reduce the overall system complexity and cost, the low-level control requirements are minimized using feedforward approaches based on pulse width and pulse frequency modulation. The control system is developed using MATLAB/Simulink/PLECS and validated experimentally.
Simplified control for redistributive balancing systems using bidirectional flyback converters
2015-06-01
2872647 byte
Conference paper
Electronic Resource
English
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