Model-Order Reduction for Thermal Management in Battery and Power Electronics

From 2012 Automotive Simulation World Congress: For cooling systems in battery and power electronics, CFD models have been used successfully, but transient CFD simulations are time consuming. When a systems-level simulation is desired, you need a thermal model that runs in a fraction of a second. To accommodate this, model-order reduction (MOR) can create a fast and accurate thermal model. This presentation is based on transfer function matching MOR. The transfer function of the thermal system is calculated numerically based on CFD results. Then a MOR is created such that it has the same transfer function. This can then be used to replace the original CFD model for fast transient thermal analysis and system-level thermal analysis.