QUANTUMSCAPE BATTERY, INC.

The present disclosure concerns lithium phosphate species for coated cathode active materials, which are useful in cathodes (i.e., positive electrodes) of rechargeable lithium-batteries for reversibly storing lithium ions (Li + ).

The present disclosure sets forth an all solid-state battery that includes a positive electrode having cathode active material, binder, and catholyte material; a solid-state buffer on at least one side of the positive electrode layer; a bonding layer, and a lithium-stuffed garnet electrolyte separator.

The instant disclosure sets forth multiphase lithium-stuffed garnet electrolytes having secondary phase inclusions, wherein these secondary phase inclusions are material(s) which is/are not a cubic phase lithium-stuffed garnet, but which is/are entrapped or enclosed within a lithium-stuffed garnet. When the secondary phase inclusions described herein are included in a lithium-stuffed garnet at 30-0.1 volume %, the inclusions stabilize the multiphase matrix and allow for improved sintering of the lithium-stuffed garnet. The electrolytes described herein, which include lithium-stuffed garnet with secondary phase inclusions, have an improved sinterability and density compared to phase pure cubic lithium-stuffed garnet having the formula Li 7 La 3 Zr 2 O 12 .

Provided herein are rapid, high quality film sintering processes that include high-throughput continuous sintering of lithium-lanthanum zirconium oxide (lithium-stuffed garnet). The instant disclosure sets forth equipment and processes for making high quality, rapidly-processed ceramic electrolyte films. These processes include high-throughput continuous sintering of lithium-lanthanum zirconium oxide for use as electrolyte films. In certain processes, the film is not in contact with any surface as it sinters (i.e., during the sintering phase).

Described herein are acid-treated solid-state electrolytes, processes for acid-treating solid-state electrolyte thin films, and electrochemical devices comprising acid-treated solid-state electrolyte thin films.

The present disclosure concerns electrochemical stacks with frames for solid-state cathodes and processes of assembling electrochemical stacks with frames for solid-state batteries.

Provided herein are processing apparatuses for producing high-quality films of sintered ceramics. The instant disclosure sets forth equipment and processes for making high quality, rapidly processed ceramic electrolyte films. These processes include high-throughput continuous sintering of oxides for use as electrolyte films. In certain processes, the film is not in contact with any surface as it sinters (i.e., during the sintering phase). Set forth herein are processes for making and using bilayers comprising a green body layer on a metal layer and bilayers comprising a sintered oxide layer on a metal layer. Set forth herein are processes for rapidly sintering thin bilayers comprising a green body layer on a metal layer in order to produce bilayers comprising a sintered oxide layer on a metal layer.

A battery management system (BMS) for a vehicle includes a module for estimating the state of a rechargeable battery, such as its state of charge, in real time. The module includes a learning model for predicting the state of a battery based on the vehicle's usage and related factors unique to the vehicle, in addition to a sensed voltage, current and temperature of a battery.

Set forth herein are processes for making sintered bilayers and sintered bilayers made by such processes. The process includes rapidly sintering thin bilayers that comprise a green body layer on a metal layer in order to produce bilayers that have a sintered oxide layer on a metal layer.

Provided herein is a module with at least two electrochemical stack assemblies (ESA), wherein each ESA individually, in each instance, includes one or more electrochemical cells, each electrochemical cell including a solid-state electrolyte; a frame surrounding the one or more electrochemical cells; and a laminated pouch surrounding the frame and the one or more electrochemical. Also set forth herein are methods of making and using the same.