# US 11,122,649 B2 · Electrically heatable layer stack > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,122,649 B2 - Document ID: US11122649B2 - Status: Granted - Kind: B2 - Application number: 15/482,178 - Filed: 2017-04-07 - Published: 2017-11-16 - Granted: 2021-09-14 - Earliest claimed: 2016-05-10 - Assignees: Airbus Operations GmbH - Applicants: Airbus Operations GmbH - Inventors: Peter Linde - Web page: https://patentgrep.com/patent/US11122649B2 ## CPC - H05B 3/145: {Carbon only, e.g. carbon black, graphite} - B32B 27/08: of synthetic resin - B32B 38/0036: {Heat treatment (for heating or cooling of layers during lamination B32B37/06, B32B37/08)} - B64D 15/12: by electric heating (heating arrangements specially adapted for transparent or reflecting areas H05B3/84) - H05B 1/0236: {for vehicles} - H05B 3/267: {the insulating base being an organic material, e.g. plastic (H05B3/262 takes precedence)} - H05B 6/46: Dielectric heating (H05B6/64 takes precedence) - B32B 2250/42: Alternating layers, e.g. ABAB(C), AABBAABB(C) - B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer - B32B 2255/20: Inorganic coating - B32B 2307/206: Insulating - B32B 2605/18: Aircraft - H05B 2214/04: Heating means manufactured by using nanotechnology - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT ## Abstract An electrically heatable layer stack is disclosed. The electrically heatable layer stack includes at least two substrate layers, and at least one carbon nanotubes-, CNT-, layer, which is arranged between the substrate layers and which is configured to conduct an electric current. The substrate layers and the at least one CNT-layer are configured to produce heating of at least one of the substrate layers when an electric current is applied to the at least one CNT-layer. A vehicle assembly group, an aircraft, a method and a system for manufacturing an electrically heatable layer stack are also disclosed. ## Claims ### Claim 1 An electrically heatable layer stack, comprising: at least two substrate layers; a plurality of carbon nanotubes (CNT) layers, each of the CNT-layers configured to conduct an electric current; and at least one electrode configured for applying an electric current to a corresponding CNT-layer of the plurality of CNT-layers, wherein at least a portion of the at least one electrode is sandwiched between one substrate layer and one of the plurality of CNT-layers, wherein the at least one electrode extends beyond an edge of the electrically heatable layer stack and the at least one electrode is adjacent to both the plurality of CNT-layers and the one substrate layer; wherein the substrate layers and the plurality of CNT-layers are configured to produce heating of at least one of the substrate layers when an electric current is applied to the one of the plurality of CNT-layers; wherein the substrate layers and the CNT-layers are arranged alternately in the layer stack. ### Claim 2 (depends on 1) The electrically heatable layer stack according to claim 1, wherein the substrate layers and the CNT-layers are configured to produce the heating at least by remote Joule heating in the at least one of the substrate layers. ### Claim 3 (depends on 1) The electrically heatable layer stack according to claim 1, wherein the each of the CNT-layers comprise a mesh of mutually crossing carbon nanotubes, CNTs, which extend in a plane of each of the CNT-layers. ### Claim 4 (depends on 1) The electrically heatable layer stack according to claim 1, wherein the substrate layers comprise electrically insulating material. ### Claim 5 (depends on 1) The electrically heatable layer stack according to claim 1, wherein the substrate layers comprise polymer resin. ### Claim 6 (depends on 5) The electrically heatable layer stack according to claim 5, wherein the polymer resin is a thermoplastic resin. ### Claim 7 (depends on 1) The electrically heatable layer stack according to claim 1, wherein a thickness of the substrate layers lies within a range from 0.05 mm to 1.0 mm. ### Claim 8 A vehicle assembly group, comprising an electrically heatable layer stack, the electrically heatable layer stack comprising: at least two substrate layers; a plurality of carbon nanotubes (CNT) layers, each of the CNT-layers configured to conduct an electric current; and at least one electrode configured for applying an electric current to a corresponding CNT-layer of the plurality of CNT-layers, wherein at least a portion of the at least one electrode is sandwiched between one substrate layer and one of the plurality of CNT-layers, wherein the at least one electrode extends beyond an edge of the electrically heatable layer stack and the at least one electrode is adjacent to both the plurality of CNT-layers and the one substrate layer; wherein the substrate layers and the plurality of CNT-layers are configured to produce heating of at least one of the substrate layers when an electric current is applied to the one of the plurality of CNT-layers; wherein the substrate layers and the CNT-layers are arranged alternately in the layer stack. ### Claim 9 (depends on 8) The vehicle assembly group according to claim 8, wherein the vehicle assembly group is an aircraft assembly group. ### Claim 10 (depends on 9) The vehicle assembly group according to claim 9, wherein the vehicle assembly group comprises at least parts of a wing of an aircraft, and the electrically heatable layer stack is arranged at least partly in a region corresponding to a leading edge of the wing of the aircraft. ### Claim 11 (depends on 8) An aircraft, comprising a vehicle assembly group according to claim 8.