Abstract: Provided is a cold plate that can improve cooling efficiency and simultaneously suppress an increase in size in the thickness direction. A heat-transfer-medium flow space 2 is formed between a heat dissipation surface of a base plate and a cover plate, the base plate has a plurality of heat transfer portions 14 that are provided so as protrude from the heat dissipation surface toward the cover plate 20 and that transfer, to a heat-transfer medium flowing through the heat-transfer-medium flow space 2, heat released from the heat dissipation surface, and concave portions 22, into which at least a portion of tips of the plurality of heat transfer portions 14 are inserted, are formed in a surface of the cover plate facing the heat-transfer-medium flow space.

Abstract: Provided is a cold plate that can improve cooling efficiency and simultaneously suppress an increase in size in a thickness direction. A heat-transfer-medium flow space 2 is formed between a heat dissipation surface 13 of a base plate 10 and a cover plate 20. The base plate 10 has a plurality of heat transfer portions 14 that are provided so as to protrude from the heat dissipation surface 13 toward the cover plate 20 and that transfer, to a heat-transfer medium flowing through the heat-transfer-medium flow space 2, heat released from the heat dissipation surface 13. A heat transfer joining portion 32 that joins at least a portion of tips of the heat transfer portions 14 to the cover plate 20 is formed between at least the portion of the tips of the plurality of heat transfer portions 14 and a surface of the cover plate 20 facing the heat-transfer-medium flow space 2.

Abstract: Power reception device includes a plurality of secondary coils which interlinks with magnetic flux output by primary coil and at least one power reception side capacitor electrically connected to the plurality of secondary coils, and receives power without contact from power transmission device including primary coil. The plurality of secondary coils are connected in series to each other. Central axes of the plurality of secondary coils are oriented in mutually different directions. The plurality of secondary coils and power reception side capacitors configure one power reception side resonance circuit. According to the present aspect, power reception side resonance circuit can be easily designed, and a decrease of power transmission efficiency can be suppressed.