United States of America As Represented by the Administrator of Nasa

John J Darst

Gary A Bayles

Steven L Rickman

William Q Walker

Bruce Lee Drolen

Eric C Dimpault-Darcy

Eric Darcy

Richard A Hagen

Christiaan Khurana

Safan Abbasi

Romil Patil

Zoran Bilc

Angad Mehrotra

David Petrushenko

Peter J Hughes

Ryan P Brown

Natalie N Anderson

Damien T Calderon

A system for measuring a heat response of a battery cell includes a cell chamber configured to receive the battery cell therein. The cell chamber is configured to trigger a battery cell into a thermal runaway event while in the cell chamber, which causes the battery cell to eject an electrode winding, particles, and gas. The system also includes an ejecta bore muffler configured to receive the electrode winding, the particles, and the gas. The system also includes an ejecta basket configured to be positioned at least partially within the ejecta bore muffler. The ejecta basket is configured to capture the electrode winding while allowing at least a portion of the particles, the gas, or both to pass therethrough. The system also includes a gas collection system configured to receive at least a portion of the gas that passes through the ejecta basket.

Large format-fractional thermal runaway calorimeter

A method for testing a battery cell includes directing a laser radiation from a laser at a radiation-receiving location on a can of the battery cell to trigger a thermal runaway event. A power, a wavelength, and a beam size of the laser radiation are selected based on a test stability of the battery cell when triggering the thermal runaway event. The test stability includes a likelihood that the can will breach in response to triggering the thermal runaway event. The method also includes ceasing to contact the radiation-receiving location with the laser radiation in response to the thermal runaway event.

Laser-based method and system for triggering thermal runaway of a battery

A system for measuring a heat response of a cell during a thermal runaway event includes a housing. An insulation is positioned within the housing. A calorimeter is positioned within the insulation and the housing. The calorimeter is configured to have the cell positioned therein. The calorimeter is configured to measure a temperature increase of the cell, one or more components of the calorimeter, or a combination thereof during the thermal runaway event of the cell. A total energy yield of the thermal runaway event is configured to be determined based at least partially upon the temperature increase. A ratio is configured to be determined based at least partially upon the temperature increase. The ratio includes energy released through a casing of the cell during the thermal runaway event vs. energy released through ejecta material from the cell during the thermal runaway event.

Systems and methods for measuring a heat response of a battery cell in thermal runaway

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Houston, TX, United States of America

John J Darst