High temperature electrochemical cell structures, and methods for making

US9806380B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Sundeep Kumar · Mainz, DE
• Thomas Martin Angeliu · Clifton Park, US
• Mohamed Rahmane · Clifton Park, US
• Arunabh Basak · Bengaluru, IN
• Raghavendra Rao Adharapurapu · Bengaluru, IN
• Tobias Juetting · Niskayuna, US

Key dates

• Filing date: Jul 1, 2014
• Grant date: Oct 31, 2017
• Expiry date: Nov 9, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/4911
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

An electrochemical cell is described, including an anodic chamber and a cathodic chamber separated by an electrolyte separator tube, all contained within a cell case. The cell also includes an electrically insulating ceramic collar positioned at an opening of the cathodic chamber, and defining an aperture in communication with the opening; along with a cathode current collector assembly; and at least one metallic ring that has a coefficient of thermal expansion (CTE) in the range of about 3 to about 7.5 ppm/° C., contacting at least a portion of a metallic component within the cell, and an adjacent ceramic component. An active braze alloy composition attaches and hermetically seals the ring to the metallic component and the collar. Sodium metal halide batteries that contain this type of cell are also described, along with methods for sealing structures within the cell.