# US 12,119,467 B2 · Composite thermal management sheet, method of manufacture, and articles using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,119,467 B2 - Document ID: US12119467B2 - Status: Granted - Kind: B2 - Application number: 17/689,420 - Filed: 2022-03-08 - Published: 2022-09-15 - Granted: 2024-10-15 - Earliest claimed: 2021-03-09 - Assignees: Rogers Corporation - Applicants: Rogers Corporation - Inventors: Max Kristy; Kenneth A. Mazich - Web page: https://patentgrep.com/patent/US12119467B2 ## CPC - H01M 10/653: characterised by electrically insulating or thermally conductive materials - H01M 10/6551: Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings - H01M 10/658: by thermal insulation or shielding - H01M 10/6595: by chemical reactions other than electrochemical reactions of the cells, e.g. catalytic heaters or burners - H01M 10/625: Vehicles - H01M 50/24: adapted for protecting batteries from their environment, e.g. from corrosion (thermal insulation H01M10/658) - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A composite thermal management sheet for a battery includes a silicone foam layer; and a reactive filler composition disposed within the silicone foam layer, the reactive filler composition including a first filler that decomposes to generate water upon initial exposure to heat; and a second filler different from the first filler, wherein the second filler forms a thermal barrier layer with a decomposition product of the first filler, or absorbs the water, or both. ## Claims ### Claim 1 A composite thermal management sheet for a battery, the composite thermal management sheet comprising: a single silicone foam layer; and a reactive filler composition disposed within the single silicone foam layer, the reactive filler composition comprising a first filler that decomposes to generate water upon initial exposure to heat; and a second filler different from the first filler, wherein the second filler forms a thermal barrier layer with a decomposition product of the first filler, or absorbs the water, or both, wherein the composite thermal management sheet is a single layer and does not comprise another layer on the single silicone foam layer. ### Claim 2 (depends on 1) The composite thermal management sheet of claim 1, wherein the thermal barrier layer comprises a borosilicate glass layer. ### Claim 3 (depends on 2) The composite thermal management sheet of claim 2, wherein the borosilicate glass comprises silicon derived from decomposition of the silicone foam layer. ### Claim 4 (depends on 1) The composite thermal management sheet of claim 1, wherein the reactive filler composition comprises aluminum trihydrate and zinc borate. ### Claim 5 (depends on 1) The composite thermal management sheet of claim 1, having a thickness of 1 to 6 millimeters. ### Claim 6 (depends on 1) The composite thermal management sheet of claim 1, having a density of 5 to 65 pounds per cubic foot (80 to 1,041 kilograms per cubic meter); a compression force deflection of 0.2 to 125 pounds per square inch (1 to 862 kilopascals), at 25% deflection and determined in accordance with ASTM D3574-17; a compression set of 0 to 15%, determined in accordance with ASTM D 3574-95 Test D at 70° C.; or a combination thereof. ### Claim 7 (depends on 1) The composite thermal management sheet of claim 1, wherein the reactive filler composition consists of aluminum trihydrate and zinc borate. ### Claim 8 (depends on 1) An assembly for a battery, comprising a first electrochemical cell comprising a first surface and a second surface opposite the first surface; an adjacent second electrochemical cell comprising a first surface facing the first electrochemical cell and a second surface opposite the first surface; and the composite thermal management sheet of claim 1 disposed directly on the first surface of the first electrochemical cell, and the first surface of the adjacent second electrochemical cell. ### Claim 9 A composite thermal management sheet for a battery, the composite thermal management sheet comprising: a silicone foam layer; and a reactive filler composition disposed within the silicone foam layer, the reactive filler composition comprising a first filler that decomposes to generate water upon initial exposure to heat, and a second filler different from the first filler, wherein the second filler forms a thermal barrier layer comprising a borosilicate glass layer with a decomposition product of the first filler, wherein the composite thermal management does not comprise another layer on the silicone foam layer. ### Claim 10 A composite thermal management sheet for a battery, the composite thermal management sheet comprising: a silicone foam layer; and a reactive filler composition disposed within the silicone foam layer, the reactive filler composition comprising borax and hydrous sodium silicate, or comprising aluminum trihydrate, zinc borate, and hydrous sodium silicate, or comprising borax and zinc borate, or comprising borax, zinc borate, and aluminum trihydrate, or comprising a superabsorbent polymer, or consisting of aluminum trihydrate and zinc borate, wherein the composite thermal management does not comprise another layer on the silicone foam layer. ### Claim 11 (depends on 10) The composite thermal management sheet of claim 10, wherein the reactive filler composition comprises the superabsorbent polymer and a different reactive filler, the superabsorbent polymer, the different reactive filler, or both decomposes to generate water upon initial exposure to heat, and the superabsorbent polymer forms a thermal barrier layer with a decomposition product of the different filler, or absorbs the water, or both; the different filler forms a thermal barrier layer with a decomposition product of the superabsorbent polymer, or absorbs the water, or both; or both. ### Claim 12 (depends on 10) The composite thermal management sheet of claim 10, wherein the reactive filler composition consists of aluminum trihydrate and zinc borate. ### Claim 13 (depends on 10) The composite thermal management sheet of claim 10, wherein the first filler and the second filler are aluminum trihydrate, ammonium nitrate, borax, hydrous sodium silicate, magnesium hydroxide, magnesium carbonate hydroxide pentahydrate, magnesium phosphate tribasic octahydrate, zinc borate, waterglass, or a combination thereof; and the superabsorbent polymer. ### Claim 14 (depends on 13) The composite thermal management sheet of claim 13, wherein the reactive filler composition comprises aluminum trihydrate, hydrous sodium silicate, magnesium carbonate hydroxide pentahydrate, magnesium phosphate tribasic octahydrate, waterglass, or a combination thereof; and the superabsorbent polymer. ### Claim 15 (depends on 13) The composite thermal management sheet of claim 13, wherein the reactive filler composition comprises ammonium nitrate, borax, hydrous sodium silicate, magnesium hydroxide, magnesium carbonate hydroxide pentahydrate, magnesium phosphate tribasic octahydrate, zinc borate, or a combination thereof; and the superabsorbent polymer. ### Claim 16 (depends on 13) The composite thermal management sheet of claim 13, wherein the reactive filler composition comprises aluminum trihydrate; and the superabsorbent polymer. ### Claim 17 (depends on 10) The composite thermal management sheet of claim 10, wherein the reactive filler composition comprises borax and hydrous sodium silicate. ### Claim 18 (depends on 10) The composite thermal management sheet of claim 10, wherein the reactive filler composition comprises aluminum trihydrate, zinc borate, and hydrous sodium silicate. ### Claim 19 (depends on 10) The composite thermal management sheet of claim 10, wherein the reactive filler composition comprises borax and zinc borate. ### Claim 20 (depends on 10) The composite thermal management sheet of claim 10, wherein the reactive filler composition comprises borax, zinc borate, and aluminum trihydrate.