"The Cayenne is the first Porsche EV battery to do away with a traditional frame, instead mounting individual modules directly to the car's body. Schmerbeck likens the old way to putting a box in a boxcells inside modules, modules inside a larger pack. Gallery: Porsche Cayenne Electric (Technical Workshop) In ditching the frame, Porsche saves weight over a comparable battery pack."
"There's also an increase in energy density, because more of the space of the pack is dedicated to the cells. It's also simpler to make, as this design requires fewer fasteners. It should offer easier repairability, because the modules can be dropped out of the car from underneath, after you remove the fiberglass underbody panel. Each module can be individually replaced."
Porsche's long-running engineering philosophy favors evolution over revolution, demonstrated by decades of rear-mounted flat-six engines. The Cayenne Electric represents a more significant change with a frameless battery that mounts individual modules directly to the car body instead of using a separate pack frame. Removing the frame saves weight and increases energy density by allocating more pack volume to cells. The design reduces fasteners and simplifies manufacturing. Modules are cooled from above and below and can be dropped out from underneath after removing the fiberglass underbody panel, enabling individual-module replacement and easier repairability. The Cayenne uses pouch cells, differing from the Macan Electric's prismatic-cell, framed approach.
Read at insideevs.com
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