Apparatus for a prismatic battery cell with built-in springs

A system comprising:

• a device including a prismatic battery cell including:
• a hard outer case defining an internal volume;
• an electrode stack disposed within the internal volume and including a pair of an anode electrode and a cathode electrode and including a plurality of electrode pair layers stacked parallel to each other, wherein the electrode pair layers each include a planar surface, wherein the anode electrode is a high-expansion anode electrode and expands in volume by at least 50% between a fully delithiated state to a fully lithiated state;
• and
• a plurality of built-in springs configured for pressing against the electrode stack in a direction perpendicular to the planar surface of each of the electrode pair layers;
• wherein the plurality of electrode pair layers stacked parallel to each other include a first plurality of electrode pair layers stacked parallel to each other, a second plurality of electrode pair layers stacked parallel to each other, and a third plurality of electrode pair layers stacked parallel to each other with the plurality of built-in spring including a first plurality of built-in springs located between the first plurality of electrode pair layers stacked parallel to each other and the second plurality of electrode pair layers stacked parallel to each other and a second plurality of built-in springs located between the second plurality of electrode pair layers stacked parallel to each other and the third plurality of electrode pair layers stacked parallel to each other.