Electrode assembly, secondary battery, and method of manufacture

US12087947B2 · kind B2 · utility

Assignee

• Enovix Corporation · US

Inventors

• Robert S. Busacca · San Francisco, US
• Ashok Lahiri · Mainz, DE
• Murali Ramasubramanian · Fremont, US
• Bruno A. Valdes · Sunnyvale, US
• Gardner Cameron Dales · Los Gatos, US
• Christopher J. Spindt · Menlo Park, US
• Geoffrey Matthew Ho · San Ramon, US
• Harrold J. Rust, III · Alamo, US
• James D. Wilcox · Cadillac, US
• John F. Varni · Campbell, US
• Kim Han Lee · Pleasanton, US
• Nirav S. Shah · Pleasanton, US
• Richard J. Contreras · Campbell, US
• Lynn Van Erden · Pollock Pines, US
• Ken S. Matsubayashi · Fremont, US
• Jeremie J. Dalton · San Jose, US
• Jason Howard · Lawrenceville, US
• Robert K. Rosen · Midland, US
• Jonathan Doan · Mountain View, US
• Michael J. Armstrong · Central City, US
• Anthony Calcaterra · Milpitas, US
• Benjamin L. Cardozo · Palo Alto, US
• Joshua David Winans · Mountain View, US
• Neelam Singh · Houston, US
• Jeffrey Glenn Buck · Salinas, US
• Thomas John Schuerlein · Pleasanton, US
• Kim Lester Fortunati · Pleasanton, US
• Neal Sarswat · Pleasanton, US

Key dates

• Filing date: Sep 10, 2021
• Grant date: Sep 10, 2024
• Expiry date: Jul 15, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/50
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

Secondary batteries and methods of manufacture thereof are provided. A secondary battery can comprise an offset between electrode and counter-electrode layers in a unit cell. Secondary batteries can be prepared by removing a population of negative electrode subunits from a negative electrode sheet, the negative electrode sheet comprising a negative electrode sheet edge margin and at least one negative electrode sheet weakened region that is internal to the negative electrode sheet edge margin, removing a population of separator layer subunits from a separator sheet, and removing a population of positive electrode subunits from a positive electrode sheet, the positive electrode sheet comprising a positive electrode edge margin and at least one positive electrode sheet weakened region that is internal to the positive electrode sheet edge margin, and stacking members of the negative electrode subunit population, the separator layer subunit population and the positive electrode subunit population.