A battery component is described that has at least one ceramic layer that includes ceramic particles and a binder. The ceramic particles may include -alumina or -alumina. The ceramic layer may be characterized by a porosity of greater than or about 40 vol %. In additional embodiments, the one or more ceramic layers may have a weight ratio of ceramic particles to binder is greater than or about 90:10. The battery component may be a battery separator that is characterized by a MacMullin number of less than or about 40 and a thermal shrinkage of less than or about 1 vol. % after 1 hour at 140 C.
Patent
BriefPatent brief
Problem
How can battery fires and thermal runaway in EV packs be prevented?
Novelty
The ceramic particles may include -alumina or -alumina.
Uses
EV packs, Battery modules, Rechargeable cells
Assignee
APPLE INC.
Published
Mar 10, 2026
Inventors
Mikyong Yoo, Soonho Ahn, Sang Young Yoon
Domain
Mobility / storage
Problem
How can battery fires and thermal runaway in EV packs be prevented?
Solution
battery component is described that has at least one ceramic layer that includes ceramic particles and a binder.
Key novelty
The ceramic particles may include -alumina or -alumina.
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