Creating if loop connecting output of subsystem to input of main system

I am modifying a model of a 6s2p battery pack. The current model has a drive cycle input where the file consists of time and current input.

I would like to modify the drive cycle such that it starts charging with 0.1C constant current until one of the cells in the subsystem of the pack reaches 4.2V, then a constant voltage drive cycle is inputted for 7200s. Next, the pack is discharged at 0.1C constant current until it reaches 2.5V.

After conducting this, I would like to cycle the pack. This is done by introducing the same profile as above but at 0.5C. After 50 cycles, I would like it to rerun the initial 0.1C test.

I am new to Simulink and Simscape and appreciate any help in terms of code and advice.

I have attached pictures of the model.

[Yaashiene Pukazhendi]

I am also including the subsystem image

Answer 1

[Animesh]

Hello Yaashiene,

I understand that you wish to modify the “drive_cycle” input in your battery pack model according to your requirements.

You can modify the “drive_cycle” input according to your desired values and conditions using a MATLAB function block in Simulink and then connecting it to the “variable load” block using Simulink-PS Converter. A MATLAB function block, in your case, would enable you to modify the current supplied by “drive_cycle” input depending on the voltage of cells in the subsystem.

For more information on using a function block and Simulink-PS converter, please consider going through the following resources:

1. Implement MATLAB Functions in Simulink with MATLAB Function Blocks: https://in.mathworks.com/help/simulink/ug/what-is-a-matlab-function-block.html
2. Connecting Simscape Diagrams to Simulink Sources and Scopes: https://in.mathworks.com/help/simscape/ug/connecting-simscape-diagrams-to-simulink-sources-and-scopes.html

I hope this helps!