https://docs.google.com/document/d/1__XgN5KwcSGN4PDO7op1BnbrN98TiNxS-JX0baDGL14/edit?usp=sharing
What is the ideal pack configuration?
Rectangle (Packing Density: 0.785) | Honeycomb (Packing Density: 0.907) |
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2S vs 4S Modules
An even number of cells in series required to keep the gusset plates on top.
Area = 0.23928 m2
PROS:
More gap area between modules, possibly better airflow and cooling for batteries
Reduced complexity per module, only one busbar connection on bottom
Module arrangement has positive and negative terminals on same side
Area in top center for hardware components
More modules means damage is more isolated and cheaper to fix
CONS:
More module to module connections, greater contact resistance and possibly greater energy loss in connections compared to 4S?
Have to create and assemble “double” the modules
Takes up more area
Area = 0.22403 m2
PROS:
Module arrangement has positive and negative terminals on same side
Area in top right for hardware components
Only have to create “half” the number of modules
Less energy loss in module to module connections
CONS:
More complex modules, need 5 busbar connections
Very long (86.7 cm)
Area = 0.20163 m2
PROS:
Smallest area required
Only have to create “half” the number of modules
Less energy loss in module to module connections
CONS:
Positive and negative terminals on opposite sides.
More complex modules, need 5 busbar connections
Cell Arrangement
What to do with empty spaces?
kinda sus
