Unitized solid-state battery cell and assembly

Abstract

A solid-state battery is assembled from a set of unitized solid-state battery cells. Each unitized cell includes a stainless steel current collector laminated on one side with three layers of solid electrolyte. The three layers include a negative active material layer, a separator layer, and a positive active material layer. One of the layers may be coated directly onto the current collector. The other two layers may be coated onto a carrier film and then transferred. All three layers are densified together. When assembled into a series connected battery structure, the only interface between layers that were not densified together is an electron migration interface. All ion migration interfaces are densified together, reducing resistance.

Dependencies are inferred from the claim text.