VEHICLE POWER SUPPLY

To provide a vehicle power supply capable of preventing discharge of a capacitor installed on a connection path between a power supply inside a vehicle and a charging port of a DC power supply.SOLUTION: The vehicle power supply includes: a quick charge port 9 to which a DC power supply 10 is connected; capacitors 31, 32, 33 connected between a positive electrode and a negative electrode of the quick charge port 9; an electric load 4 connected to a battery 51; a first switch 11 for opening and closing a connection path between a positive electrode of the battery 51 and the capacitors 31, 32, 33; a second switch 12 for opening and closing a connection path between the positive electrode of the battery 51 and the electric load 4; a third switch 13 for opening and closing a connection path between the positive electrode of the battery 51 and a positive electrode of the quick charge port 9; a fourth switch 14 for opening and closing a connection path between the negative electrode of the battery 51 and the capacitors 31, 32, 33; a fifth switch 15 for opening and closing a connection path between the negative electrode of the battery 51 and the electrical load 4; and a sixth switch 16 for opening and closing a connection path between the negative electrode of the battery 51 and the negative electrode of the quick charge port 9.SELECTED DRAWING: Figure 2 【課題】車両内部の電源と直流電源の充電口との接続経路上に設置されたキャパシタが放電することを防止することができる車両用電源装置を提供すること。【解決手段】直流電源１０が接続される急速充電口９と、急速充電口９の正極と負極との間に接続されるキャパシタ３１、３２、３３と、バッテリ５１と接続される電装負荷４と、バッテリ５１の正極とキャパシタ３１、３２、３３との接続経路を開閉する第一スイッチ１１と、バッテリ５１の正極と電装負荷４との接続経路を開閉する第二スイッチ１２と、バッテリ５１の正極と急速充電口９の正極との接続経路を開閉する第三スイッチ１３と、バッテリ５１の負極とキャパシタ３１、３２、３３との接続経路を開閉する第四スイッチ１４と、バッテリ５１の負極と電装負荷４との接続経路を開閉する第五スイッチ１５と、バッテリ５１の負極と急速充電口９の負極との接続経路を開閉する第六スイッチ１６と、を備える。【選択図】図２