About:Lumped Thermal
0D Lumped Temperature Model - Ensure safe, efficient operation with thermal performance modeling
Overview
About:Lumped is a simple thermal model which defines a lumped heat capacity for the whole battery. This model predicts the temperature evolution of a battery depending on internal heat generation rate, cooling efficiency, and external temperature.
Technical Description
About:Lumped solves a 0D heat equation for the average cell temperature, considering a lumped (total) heat capacity for the cell, internal heat generation, and cooling. Internal heat generation is equal to the power dissipation of the cell as irreversible losses (product of overvoltage with current). Cooling is expressed using a user-defined lumped heat transfer coefficient describing cooling from the cell exterior, according to Newton’s law of cooling.
Local thermal heterogeneity of the cell is ignored. Radiative cooling is not included.
Effectively isothermal behaviour can be achieved by setting \(C_\mathrm{p,cell}\) to an infinite value.
Key features
- Compatible with any core battery model
Key applications
- Cell comparison and selection
- Determination of empirical cooling system requirements