To reduce the number of components of the whole of a power control unit including a water pump by combining and integrating components of the water pump and components of the power control unit to downsize the power control unit.SOLUTION: A power control unit for an electric vehicle includes: an inverter which controls a supply voltage to a vehicle driving motor from a high-voltage battery 41; a DC/DC converter 10 which steps down the voltage of the high-voltage battery 41 to a voltage capable charging a low-voltage battery 42 serving as a power source for an in-vehicle auxiliary machine; a circuit board 102 which is mounted with a first electrical circuit element constituting the inverter or the DC/DC converter 10; a heat sink which cools the first electrical circuit element; a water pump which circulates a refrigerant in a refrigerant passage of the heat sink; a water pump control circuit which controls the operation of the water pump. A coolant to flow to a refrigerant passage of the heat sink; and a water pump control circuit controlling operation of the water pump. A second electrical circuit element constituting the water pump control circuit is mounted on the circuit board 102 together with the first electrical circuit element.SELECTED DRAWING: Figure 6

    【課題】ウォータポンプの構成部品をパワーコントロールユニットの構成部品に組み合わせて一体化することにより、ウォータポンプを含むパワーコントロールユニット全体の部品点数を削減してパワーコントロールユニットを小型化する。【解決手段】電動車両において、高圧バッテリ41から車両駆動用モータへの供給電圧を制御するインバータと、高圧バッテリ41の電圧を、車両内補機類の電源となる低圧バッテリ42を充電可能な電圧まで降圧するDCDCコンバータ10と、インバータ又はDCDCコンバータ10を構成する第1電気回路素子を搭載する回路基板102と、第1電気回路素子を冷却するヒートシンクと、ヒートシンクの冷媒通路に冷媒を通流させるウォータポンプと、ウォータポンプの作動を制御するウォータポンプ制御回路と、を備え、ウォータポンプ制御回路を構成する第2電気回路素子は、回路基板102に第1電気回路素子と共に搭載されている。【選択図】図6


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    Title :

    POWER CONTROL UNIT FOR ELECTRIC VEHICLE


    Additional title:

    電動車両用パワーコントロールユニット


    Contributors:

    Publication date :

    2023-05-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern



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