US 12,308,412 B2
Battery pack system with thermal runaway mitigation features
Chih-hung Yen, Bloomfield Hills, MI (US); Taeyoung Han, Bloomfield Hills, MI (US); Bahram Khalighi, Holladay, UT (US); and Peter Paul Andruskiewicz, IV, Ann Arbor, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM Global Technology Operations LLC, Detroit, MI (US)
Filed on May 16, 2022, as Appl. No. 17/745,117.
Prior Publication US 2023/0369682 A1, Nov. 16, 2023
Int. Cl. H01M 10/6595 (2014.01); H01M 10/647 (2014.01); H01M 10/6555 (2014.01); H01M 50/209 (2021.01); H01M 50/211 (2021.01); H01M 50/293 (2021.01)
CPC H01M 10/6595 (2015.04) [H01M 10/647 (2015.04); H01M 10/6555 (2015.04); H01M 50/209 (2021.01); H01M 50/211 (2021.01); H01M 50/293 (2021.01); H01M 2200/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A battery pack system comprising
a stack of battery cells wherein each battery cell has a first end, a second end opposite the first end, and side edges extending from the first end to the second end and wherein at least one of the side edges of each battery cell are adjacent to at least one side edge of another of the battery cells,
a gap defined by the first end and an inner surface of a frame where the gap separates the stack of battery cells from a thermochemical material,
a cooling system which releases a coolant into the gap through a one-way valve upon a predetermined threshold being reached, and
the thermochemical material is a hydrated salt or hydrated zeolite that undergoes endothermic dehydration reaction at temperatures above 50° C. and that has a ΔHdehydration of at least 150 kilojoules/kilogram,
wherein the thermomechanical material (a) is deposited as a layer on the inner surface of the frame, (b) is embedded in the inner surface of the frame, (c) is adhered or embedded in a portion of a gas manifold, wherein the gas manifold is in fluid communication with the gap, or (d) is deposited as a layer on or is embedded in a solid, porous, or lattice structure inserted into the gas manifold.