Custom Table-Based Battery Cell Model for SimScape Battery Builder

I have a non-standard chemistry for a cell that I am trying to build into a utility scale battery pack but so far I have only been able successfully build using the default Table-Based battery model.

I have tried creating a new element in the SimScape battery Library and I have tried modifying the default values in the default Table-Based battery model. While the SimScape library reflects these changes when I try to use these cell models in the Battery builder from the parallel assembly on up the original default table-based model is used by battery builder.

I had thought that maybe this was a function of the graphical battery builder so I tried using the code based battery builder and defined my cell model to be the desired model in the SimScape library by changing the CellModelBlockPath. The resulting assembly still utilized the default table-based values even though I have them changed in the SimScape Library.

Am I missing something or is it just not a funciton of the battery builder to allow for user defined custom cell models?

Answer 1

[Hassaan]

Here are some steps and considerations that might help you troubleshoot and achieve the desired outcome:

1. Confirm Compatibility: Ensure that the version of MATLAB and SimScape you are using supports custom cell models in the Battery Builder. Sometimes, features are version-specific.
2. Check the Implementation of Custom Model:

• Ensure that your custom cell model adheres to the requirements and format expected by the Battery Builder. This might include specific block parameters or interfaces.
• Verify that your model is saved correctly within the SimScape library and that there are no errors in the model itself that might be causing it to revert to default settings.

1. Examine CellModelBlockPath:

• When using the code-based approach to define the CellModelBlockPath, ensure that the path is correctly pointing to your custom model. It's easy to make a mistake in the path, leading to the Battery Builder defaulting to the standard model.
• Check if there are any overrides or settings within the Battery Builder that might be forcing it to use the default model despite the CellModelBlockPath being set.

1. Investigate Graphical vs. Code-Based Battery Builder:

• If the graphical Battery Builder consistently reverts to the default model, but the code-based approach seems to accept the custom model (even if not fully functional), it might indicate a limitation or bug in the graphical interface.
• If both graphical and code-based approaches fail, the issue is likely deeper, possibly with how the custom model is integrated into SimScape.

1. Consult Documentation and Support:

• Thoroughly review MATLAB's documentation on custom cell models in SimScape to ensure all steps are correctly followed.
• If the problem persists, consider reaching out to MATLAB's technical support or consulting forums. Sometimes, issues like this can be specific to the software version or require insight from the software developers.

1. Debugging and Testing:

• Try creating a very simple custom model and see if that is accepted by the Battery Builder. This can help determine if the issue is with the complexity of your model or with the integration process itself.
• Use MATLAB's debugging tools to track how the Battery Builder interacts with the custom model. This might provide insights into where the process is failing.

1. Check for Updates or Patches:

• Sometimes, software bugs can limit functionality. Check if there are any updates or patches for MATLAB or SimScape that might address this issue.

If, after all these steps, you find that it's not possible to integrate a custom cell model using the Battery Builder, you may need to consider building your battery model more manually within SimScape, without relying on the automated features of the Battery Builder. This approach can be more labor-intensive but might offer the flexibility you need for your specific battery chemistry.

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