Nissan Motor Company Limited

Renault S.a.s.

Tomohiro Umino

Hirofumi Shimizu

Yasuyuki Kubota

Soichi Ishii

A power converter () includes a power converter circuit (), a cooler (), and a cover member (). The power converter circuit is configured to convert input electric power into DC power or AC power. The power converter circuit is placed on the cooler. The cooler is configured to cool the power converter. The power converter circuit is housed between the cooler and the cover member. The cooler () includes a main body (), a coolant flow passage (), and a coolant input/output portion (). The coolant flow passage is formed inside the main body. A coolant is circulatable through the coolant flow passage. The coolant input/output portion is coupled to the coolant flow passage. The coolant input/output portion includes a coolant introduction pipe () and a coolant discharge pipe (). The coolant introduction pipe introduces the coolant from outside the cooler. The coolant discharge pipe discharges the coolant to outside the cooler. The coolant input/output portion () is joined to the main body. The joined part () has a joining strength lower than a strength of the main body.

Power convertor

An in-vehicle power conversion device includes a drive unit, a casing and a plurality of busbars. The drive unit converts and transmits electric power. The casing includes electrical input-output parts and a main body. The main body includes a housing portion that houses the drive unit, and a lid body that closes the housing portion. The busbars electrically connect the drive unit and the electrical input-output parts of the casing to and from which electric power is inputted and outputted. The electrical input-output parts are routed outside of the casing. The busbars have heat-dissipating portions that are arranged along the casing to transfer heat to the casing outside of the housing portion.

In-vehicle power conversion device

A rotating electrical machine system integrally includes a rotating electrical machine housed in a first chamber of a housing and a semiconductor module housed in a second chamber of the housing and electrically coupled to the rotating electrical machine. The rotating electrical machine includes a stator secured to an inner circumference surface of the first chamber and a rotor rotatably disposed with respect to the stator. The rotating electrical machine system further includes a cooler disposed between a bottom portion of the second chamber and the semiconductor module to cool the semiconductor module and the stator by coolant that passes through an inside of the cooler.

Growing community of inventors

Kanagawa, Japan

Tomohiro Umino