Abstract: An electrical device such as a power control apparatus comprises a case and at least one electrical component accommodated in the case. The case has a flow path for a cooling fluid. The flow path is formed between a bottom portion and a cover. The flow path is elongated generally along a U shape. The bottom portion and the cover are joined by welding. The cover is formed with protruding portions protruding into the flow path. The protruding portions have shapes to reduce stress concentration on welding portions. A stress caused by a pressure of the cooling fluid may acts on a distal end formed inside of the U shape in a concentration manner.

Abstract: An electric power converter apparatus includes a case. The case includes a case main body and a lower cover. A recess is formed at a main body floor of the case main body and is covered with the lower cover to form a floor passage. The floor passage includes an upstream passage and a downstream passage. The lower cover includes joint plate portions, a passage plate portion and beads. The joint plate portions are arranged side by side in a width direction of the floor passage while the floor passage is interposed between the joint plate portions. The passage plate portion extends over the joint plate portions in the width direction of the floor passage. Each bead is formed between the passage plate portion and a corresponding one of the joint plate portions and extends in an intersecting direction that intersects the passage plate portion.

Abstract: A member for electric conduction, comprising a metal member and a resin member that is joined to at least a part of a surface of the metal member, the metal member having a roughness index, which is obtained by dividing a true surface area (m2) measured by a krypton adsorption method by a geometric surface area (m2), of 4.0 or more.

Abstract: Provided is an electronic device housing including a metal member and a plastic antenna cover that are joined and integrated by insert molding. In this electronic device housing, the plastic antenna cover is a molded product of a thermoplastic resin composition containing a thermoplastic polyester resin having a melting point Tm equal to or higher than 250° C.