<aside> 🏠
</aside>
Lumped thermal model
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.
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.
| Version | Release Date | Comments |
|---|---|---|
| 1.0 | 14 Mar 2023 | First release |
| 2.0 | 23 April 2025 | - Rename $Q_\text{cool}$ to $Q_\text{ext}$ |