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Workbench dedicated to the creation of battery packs in FreeCAD. Mainly focused on 18650-based battery packs.

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Athanaze/Battery-Pack-Workbench

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Battery Pack Workbench

Workbench dedicated to the creation of battery packs in FreeCAD. Mainly focused on 18650-based battery packs.

Only generates battery pack as an "ortholinear grid" of cells.

Use cases

  • Quickly calculate the capacity, voltage, amps, weight, of different battery configuration (brand, 2S, 3S, etc...)
  • Generate the model to check fit and dimensions
  • Prepare for building the actual battery (e.g. the worbench gives you an estimate of how much nickel strip is required)

Preferences

Preferences can be modified by changing the values in preferences.py The easiest way to load the new preferences is to restart freecad

Usage on non-manjaro platforms/distros : bugs, errors

I only use manjaro so you might get some errors concerning the path of scripts, assets, etc... or other issues when running this addon on other platforms/distros. If you are able to fix those, I would happily include the fixes in the project.

TODO

  • Pie graph for the weight : 90% cells, 8% holders, 2% nickel strip...
  • Graphs to compare differents battery packs (select them first, then click "Comparison")

Note on the included models

I have chosen to include some .step models with the workbench. This is why this workbench is relatively "heavy" to download. I am not sure if this is the proper way to do it in FreeCAD so I am open to suggestion to fix this.

Credits

BMS

https://grabcad.com/library/bms-10s-up-to-5p-1

t-plug

https://grabcad.com/library/tplug-male-female-t-plug-t-plug-1

XT-60

https://grabcad.com/library/xt60h-connector-correct-contact-spacing-1

18650 Holder

https://grabcad.com/library/1p-18650-battery-bracket-1

18650 spreadsheets

Note: I have not checked every values in this spreadsheets, so I recommend always checking with the producer's datasheets. The main function of these spreadsheets is to provide autocomplete and a rough idea of weight and performance. There are prices and link to sellers for some parts. I am not in any way associated with these sellers (maybe the creator of the spreadsheets is ?). I kept the informations in to give a rough idea of the price.

Additional notes from IvanStroganov

"Note: Max values are only possible at ideal temperatures (5 to 45°C). Esp. low temperatures (-20 to 5°C) can drastically reduce performance. If only one value is given, consider it Max."

Documentation used

Workbench creation

https://wiki.freecadweb.org/Workbench_creation

Pyside basics

https://wiki.freecadweb.org/PySide_Beginner_Examples

Pyside docs

https://srinikom.github.io/pyside-docs/PySide/QtGui/QLabel.html#PySide.QtGui.QLabel

Matplotlib colors

https://matplotlib.org/stable/gallery/color/named_colors.html

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Workbench dedicated to the creation of battery packs in FreeCAD. Mainly focused on 18650-based battery packs.

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