US 12,288,973 B2
Bus bar cooling structure
Masaaki Katayama, Tokyo (JP); and Atsushi Hayashi, Susono (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Dec. 16, 2022, as Appl. No. 18/083,076.
Claims priority of application No. 2022-026899 (JP), filed on Feb. 24, 2022.
Prior Publication US 2023/0268728 A1, Aug. 24, 2023
Int. Cl. H02G 5/10 (2006.01); H05K 7/20 (2006.01)
CPC H02G 5/10 (2013.01) [H05K 7/20445 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A bus bar cooling structure, comprising:
a plurality of bus bars, each bus bar including
a current-carrying portion that forms a portion from a start point to an end point of a current path, and
a heat transfer portion that is not included in the current path; and
an insulating cooling portion in which only the heat transfer portion of each bus bar is embedded, the insulating cooling portion being provided so as to be in contact with the heat transfer portion,
current paths of the plurality of bus bars having different length lengths from start points to end points of the current paths,
a contact area between the heat transfer portion of each bus bar and the cooling portion being set to an area proportional to a length of the bus bar.