How can I build a 4s6p module using battery builder with cells of different capacities?

I'm interested in using Battery Builder to build a 4s6p module. My requirement is that each of the 24 cells have different capacities and internal resistances. How can I achieve this?

I've already tried this, but I can only build ParallelAssembly, Module, and ModuleAssembly with the same cell type.

Answer 1

[Gayathri]

Hi @Victor Olivero,

Currently I am not sure if there is any function to create a battery pack of cells with different capacitance and internal resistance. It is achievable by creating single cell of required configuration and then stacking them in series or parallel as required.

This can also be achieved by coding from MATLAB. A sample example can be seen below.

battPset = batteryParallelAssembly(battCell, 1,"Rows",1);
battModule = batteryModule(battPset);
battPset1 = batteryParallelAssembly(battCell, 1,"Rows",1);
battModule1 = batteryModule(battPset5, Position=[0,0.01,0]);
batteryModAssembly = batteryModuleAssembly([battModule,battModule1], StackingAxis="X", CircuitConnection="Parallel"); % The circuit connection can be mentioned as series when required
buildBattery(batteryModAssembly, LibraryName="Option1")

The desired battery pack can created in this way using loops to connect 24 cells. Please make sure to mention the required resistance and capacitance for each cell. The resistance and capacitance can be set by using the properties mentioned in the below link.

https://www.mathworks.com/help/simscape-battery/ref/simscape.battery.builder.parallelassembly.html

Please refer to the documentation link below to build a simple battery module.

https://www.mathworks.com/help/simscape-battery/ug/build-battery-module.html

Answer 2

[Sebastian Arias Alfaro]

Hello Victor,

The pack builder has a property just for this purpose. You can apply a manufacturing variability to the parameters of the cell models by following this example: https://www.mathworks.com/help/simscape-battery/ug/apply-parameter-variation-to-cells-module.html. Hope it helps.