US 12,417,866 B2
Method for confectioning resistors, resistor, and heating device
Julio Abraham Carrera Garcia, Vigo (ES)
Assigned to BorgWarner Inc., Auburn Hills, MI (US)
Filed by BorgWarner Inc., Auburn Hills, MI (US)
Filed on Dec. 17, 2021, as Appl. No. 17/554,739.
Claims priority of application No. 21210554 (EP), filed on Nov. 25, 2021.
Prior Publication US 2023/0162895 A1, May 25, 2023
Int. Cl. H01C 17/00 (2006.01); B23K 26/351 (2014.01); F24H 9/1818 (2022.01); G01R 31/01 (2020.01); H01C 1/01 (2006.01); H01C 1/14 (2006.01); H01C 7/02 (2006.01); H01C 17/24 (2006.01); H05B 3/06 (2006.01); H05B 3/44 (2006.01)
CPC H01C 17/00 (2013.01) [B23K 26/351 (2015.10); G01R 31/013 (2013.01); H01C 1/1406 (2013.01); H01C 7/021 (2013.01); H05B 3/06 (2013.01); H05B 3/44 (2013.01); F24H 9/1827 (2013.01); H01C 1/01 (2013.01); H01C 17/24 (2013.01); H05B 2203/017 (2013.01); H05B 2203/02 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method for confectioning resistors that each comprise a PTC ceramic plate and metallic electrode layers covering opposite faces of the ceramic plate, said method comprising:
measuring an electrical resistance of each resistor to be confectioned by applying an electrical potential to one of the electrode layers such that an electric current flows from the one electrode layer through the ceramic plate to the electrode layer on the opposite face of the ceramic plate;
comparing the measured resistance to a target resistance;
identifying at least one resistor wherein the measured resistance is lower than the target resistance; and
removing a section of at least one of the electrode layers of the at least one resistor as a function of a difference between the target resistance and the measured resistance.