US 12,230,844 B2
Safety layer for battery cells
Jiang Fan, San Diego, CA (US)
Assigned to American Lithium Energy Corporation, Carlsbad, CA (US)
Appl. No. 17/255,356
Filed by American Lithium Energy Corporation, Carlsbad, CA (US)
PCT Filed Jun. 25, 2019, PCT No. PCT/US2019/039054
§ 371(c)(1), (2) Date Dec. 22, 2020,
PCT Pub. No. WO2020/005988, PCT Pub. Date Jan. 2, 2020.
Claims priority of provisional application 62/689,746, filed on Jun. 25, 2018.
Prior Publication US 2021/0376432 A1, Dec. 2, 2021
Int. Cl. H01M 50/581 (2021.01); H01M 4/66 (2006.01); H01M 50/574 (2021.01)
CPC H01M 50/581 (2021.01) [H01M 4/667 (2013.01); H01M 50/574 (2021.01); H01M 2200/10 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A battery cell, comprising:
a first electrode;
a second electrode having an opposite polarity as the first electrode; a first current collector electrically coupled with the first electrode;
a second current collector electrically coupled with the second electrode; and
a safe layer interposed between the first electrode and first current collector, the safe layer responding to being exposed to a target temperature by at least interrupting a current flow in the battery cell, the safe layer interrupting the current flow in the battery cell by at least decomposing and/or delaminating upon exposure to the target temperature to form a non-conductive gap between the first electrode and the first current collector, the safe layer including polyhedral oligomeric silsesquioxane (POSS) and one or more electrically conductive additives, the one or more electrically conductive additives rendering the safe layer electrically conductive at temperatures below the target temperature, and the safe layer forming the non-conductive gap at the target temperature due to the polyhedral oligomeric silsesquioxane (POSS) decomposing upon exposure to the target temperature.