Murari Iyengar
Ansys Employee

Hi, 


For conditions where the electric load does not change much, the NTGK model can be used for simulating the battery charging / discharging cycle. However, should the sudden surges in the electric load occur, such as in a real driving cycle, the NTGK model will not account for the inertial changes. For simulations of such abrupt fluctuations in the electric load, you can use the Ansys Fluent Equivalent Circuit Model (ECM) model.

You can find more information about the ECM model and parameters here.
20.2. Electro-Chemical Models (ansys.com)

You can find more information about the NTGK model here.
20.2.1. NTGK Model (ansys.com)