Extreme fast charging (XFC) battery technology specialist StoreDot has successfully developed its first prismatic XFC silicon-dominant battery cells.

Prismatic cells, characterized by their rectangular shape and layered arrangement, have become the preferred form factor for many EV manufacturers. The flat surface of these cells simplifies integration into electric vehicles, Storedot says, and improves thermal management while reducing pack assembly costs and complexity.

The shift from pouch to prismatic cells, particularly the incorporation of silicon-based chemistry with XFC capability in prismatic packaging, poses various engineering and manufacturing challenges.

Storedot has addressed these challenges by carefully designing stack thickness, managing formation currents and pressure regimes, and handling the swelling associated with silicon-dominant anode technology and high currents within a prismatic hard case enclosure.

The company continues to refine the design of the cells, aiming for a cell capacity of up to 170Ah and a volumetric energy density exceeding 700 Wh/L.

The development follows StoreDot’s announcement earlier this year of its I-BEAM XFC design, a cell-to-pack concept facilitating the integration of XFC from the cell to the vehicle level.

“Successfully producing and passing initial tests of prismatic cells represents a huge leap toward delivering our XFC batteries in a format that can easily integrate into mass-produced EVs” said Dr Doron Myersdorf, CEO StoreDot.

“By mastering prismatic XFC cell design, we are now able to offer our OEM partners batteries in the format they need with the game-changing charging speed of our XFC technology – 100 miles of range in five minutes of charging.”