StoreDot manufactured its first-ever prismatic XFC (extreme fast charging) silicon-dominant battery cells. Prismatic cells, which are rectangular and stacked in layers, now represent the form factor of choice for a growing number of EV manufacturers, StoreDot said. These types of cells offer added mechanical protection and performance advantages, while the flat surface simplifies the integration into electric vehicles with better thermal management and safety considerations – thus reducing pack assembly cost and complexity.

However, StoreDot the transition from pouch to prismatic cells, and the integration of silicon-based chemistry with XFC capability in prismatic packaging, introduce several engineering challenges and manufacturing complexities. StoreDot’s solution is based on the design of the stack thickness, formation currents and pressure regimes, as well as managing the associated swelling of silicon-dominant anode technology and high currents in a prismatic hard case enclosure.

StoreDot said it’s shown its XFC technology is factor-agnostic and can be adapted to different cell form factors needed by automakers. The company said it will continue to update the design to achieve up to 170Ah of cell capacity and over 700 Wh/L volumetric energy density.

The announcement follows StoreDot’s news earlier this year that it unveiled an XFC concept for taking extreme fast charging from the cell to the vehicle level with its new I-Beam XFC design, a cell-to-pack concept that will also accelerate XFC integration into EVs, it said.