How could I control the thermal coupling between two elements (e.g. two battery cell)?
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I would like to control thermal connection between two or more battery cells acc. to input about the coupled cells in parallel and series?
Is there some switch function block for thermal connection? Or are there other possibilities?
Thank you for your answer in advance.
Javier Gazzarri on 9 Jan 2020
Thank you for your question.
Simscape Electrical has a battery cell block which has the option of turning on the thermal behavior, and you can then right-click on the block, select Block Options, and enable the thermal port. This port is a thermal connection that you can use to thermally link the battery cell to its environment via conduction, convection, and radiation.
Please let me know if this helps.
Javier Gazzarri on 14 Jan 2020
Thank you for your good wishes.
What you are trying to do is possible, but using Simscape makes it much easier because it works with acausal physical networks instead of signals. This means that you assemble your model as if you were drawing a schematic of the system. Doing it using only Simulink requires the implementation of the physical equations in mathematical form and also establishing their interactions.
The way to programmatically construct a model with a user-defined number of elements (battery cells in this case) is to use the MATLAB functions add_block and add_line. These functions bring library blocks onto the canvas and connect them, respectively. This is applicable to any Simulink component, including Simscape.
Please see the attachment I created as a simple example.
Please let me know if you have any further question.
Javier Gazzarri on 15 Jan 2020
Thank you for your clarification.
If you need to switch heat transfer on and off in a thermal circuit you can use a variable thermal resistance from the Simscape Foundation Library and assign a very large resistance when you need to open the circuit. This block was introduced in 17b.
Please let me know if this solves your problem.