Panasonic Ev Energy Co., Ltd.

Tetsuya Mizoguchi

Masahiko Suzuki

Kunio Kanamaru

Yasushi Matsukawa

Yukie Uemura

Kouta Togashi

Duncan Bullock

A power supply device that enables completion of precharging to be accurately determined without increasing manufacturing cost. The power supply device includes a battery pack, a positive main contactor, a precharge contactor, and a precharge resistor. The battery pack supplies DC power to an inverter. A smoothing capacitor is arranged between input terminals of the inverter. The positive main contact disconnects the inverter from a positive electrode of the battery pack. A voltmeter detects the voltage between a negative electrode of the battery pack and a connection node of the precharge contactor and precharge resistor. Voltage detection values taken by the voltmeter immediately before precharging and during precharging are used to determine precharging completion.

Power supply device

An inverter according to the invention includes an open circuit instructing device (ECU, Steps Sto S). The open circuit instructing device is for opening a switching circuit based on resistor inter-terminal voltage Vrb and resistor current Irb.

Circuit controller, inrush current limiting circuit, inrush current limiting circuit with battery, inverter, and inverter with battery

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Kosai, Japan

Tetsuya Mizoguchi