US 12,484,201 B2
Electric device with immersed electronic components and elongated busbar forming an upward flow
Takahiro Sunaga, Mie (JP); Hideyuki Kuboki, Mie (JP); and Masayoshi Hirota, Mie (JP)
Assigned to AUTONETWORKS TECHNOLOGIES, LTD., Mie (JP); SUMITOMO WIRING SYSTEMS, LTD., Mie (JP); and SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 18/013,950
Filed by AUTONETWORKS TECHNOLOGIES, LTD., Mie (JP); SUMITOMO WIRING SYSTEMS, LTD., Mie (JP); and SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
PCT Filed Jun. 17, 2021, PCT No. PCT/JP2021/022971
§ 371(c)(1), (2) Date Dec. 30, 2022,
PCT Pub. No. WO2022/004400, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. 2020-115388 (JP), filed on Jul. 3, 2020.
Prior Publication US 2023/0292473 A1, Sep. 14, 2023
Int. Cl. H05K 7/20 (2006.01); H05K 5/04 (2006.01); H05K 7/14 (2006.01)
CPC H05K 7/20927 (2013.01) [H05K 5/04 (2013.01); H05K 7/14329 (2022.08); H05K 7/20236 (2013.01); H05K 7/20872 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An electric device comprising:
a case;
a circuit substrate that is disposed in the case; and
a plurality of electronic components that are disposed in the case, and generate different amounts of heat when energized,
wherein the case is filled with a liquid insulating-and-cooling medium,
the circuit substrate is disposed in an orientation in which a normal line of a substrate surface that is a plate surface of the circuit substrate is horizontal, and
the plurality of electronic components are disposed in the case such that the different amounts of heat generated by the plurality of electronic components when energized decrease upward from below, and are immersed in the liquid insulating-and-cooling medium,
wherein the plurality of electronic components are disposed such that a total amount of heat generated by electronic components positioned below ½ of an inner height of the case in an up-down direction accounts for 70% or more of an amount of heat generated by all of the plurality of electronic components when energized.