US 12,316,061 B2
Method for making electrical contact with a superconductive strip conductor
Otto Batz, Leutenbach (DE); Michael Frank, Uttenreuth (DE); Peter Kummeth, Herzogenaurach (DE); and Marijn Pieter Oomen, Erlangen (DE)
Assigned to Siemens Energy Global GmbH & Co. KG, Bayern (DE)
Appl. No. 17/284,059
Filed by Siemens Energy Global GmbH & Co. KG, Bayern (DE)
PCT Filed Oct. 15, 2019, PCT No. PCT/EP2019/077835
§ 371(c)(1), (2) Date Apr. 9, 2021,
PCT Pub. No. WO2020/078937, PCT Pub. Date Apr. 23, 2020.
Claims priority of application No. 10 2018 217 612.4 (DE), filed on Oct. 15, 2018.
Prior Publication US 2021/0408700 A1, Dec. 30, 2021
Int. Cl. H01R 43/02 (2006.01); H01R 4/68 (2006.01); H01R 4/02 (2006.01)
CPC H01R 4/68 (2013.01) [H01R 43/02 (2013.01); H01R 4/029 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for forming an electrical contacting between a first superconducting strip conductor and a further electrical conductor element, wherein the first superconducting strip conductor comprises a superconducting material that provides a first electrical path through the first superconducting strip conductor and an outermost stabilizing layer that provides a backup electrical path through the first superconducting strip conductor, wherein the outermost stabilizing layer is configured to maintain electrical continuity of the first superconducting strip conductor when a resistance of the superconducting material increases, the method comprising:
bringing a contact region of the outermost stabilizing layer of the first superconducting strip conductor into areal contact with a first main surface of a reactive multilayer film,
bringing a second main surface of the reactive multilayer film that faces away from the first main surface into areal contact with the further electrical conductor element,
forming a permanent electrically conductive connection between the first superconducting strip conductor and the further electrical conductor element by subsequently triggering an exothermic chemical reaction in the reactive multilayer film, wherein a reaction temperature of the exothermic chemical reaction is between 1000° C. and 2000° C.,
locally melting a surface of the outermost stabilizing layer during the exothermic chemical reaction so that the permanent electrically conductive connection comprises material of the outermost stabilizing layer, and
wherein a lateral propagation speed of the exothermic chemical reaction and a heat capacity of the first superconducting strip conductor are configured to ensure a temperature of superconducting material adjacent the contact region remains below 200° C. throughout the forming of the permanent electrically conductive connection.