The United States of America As Represented by the Administrator of the

United States of America As Represented by the Administrator of Nasa

Eric C Dimpault-Darcy

Bruce Lee Drolen

Gary A Bayles

Steven L Rickman

John J Darst

William Q Walker

Christiaan Khurana

Bobby J Bragg

Zoran Bilc

Natalie N Anderson

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

A protective device for one battery or serially arranged battery cells is adapted to fit between one battery and its terminal connector or between adjacent battery cells. The device incorporates a disk of positive temperature coefficient material having a pair of circular end faces for contact. The disk is supported by a ring adhesively joined thereto, the ring having a central axial opening to enable the button terminal of a battery cell to contact against the disk as the disk and battery cell are arranged in a single battery application or in serial contact with similar battery cells.

Thermal switch disc for short circuit protection of batteries

Growing community of inventors

Houston, TX, United States of America

Eric C Dimpault-Darcy