Abstract: A high voltage power supply device has a plurality of battery modules connected to each other in series by coupling a safety plug unit to a safety plug unit connecting base to output a series voltage from a power supply output coupler. The safety plug unit connects/disconnects electrode terminals of all the battery modules to each other. Female electrode bodies electrically connected to power supply terminals of the respective battery modules are collectively positioned in a limited area and are arranged at equal intervals on the safety plug unit connecting base. An output voltage of each battery module is set to be lower than 50V to reduce the risk of injury during use, inspection or maintenance of the high voltage power supply device and to downsize the device.

Abstract: A power supply system that supplies high-voltage power to a vehicle drive motor is provided to achieve reduction in size, weight and cost of power supply. The power supply system includes a plurality of battery modules connected in series. With the intermediate connection point of the battery modules as an electrical neutral point, power is supplied to a three-level inverter via a three-level-potential high-voltage power supply line having potentials of +150V and ?150V relative to this neutral point. In the three-level inverter, direct-current electric power is converted into three-phase alternating-current electric power to drive an electric motor. Accordingly, the withstand-voltage performance required of control units or control elements connected to the high-voltage power supply line can be halved as compared with the related art, thereby allowing a reduction in the size, weight, and cost of the power supply system.

Abstract: A power supply system that supplies high-voltage power to a vehicle drive motor is provided to achieve reduction in size, weight and cost of power supply. The power supply system includes a plurality of battery modules connected in series. With the intermediate connection point of the battery modules as an electrical neutral point, power is supplied to a three-level inverter via a three-level-potential high-voltage power supply line having potentials of +150V and ?150V relative to this neutral point. In the three-level inverter, direct-current electric power is converted into three-phase alternating-current electric power to drive an electric motor. Accordingly, the withstand-voltage performance required of control units or control elements connected to the high-voltage power supply line can be halved as compared with the related art, thereby allowing a reduction in the size, weight, and cost of the power supply system.

Abstract: A high voltage power supply device has a plurality of battery modules connected to each other in series by coupling a safety plug unit to a safety plug unit connecting base to output a series voltage from a power supply output coupler. The safety plug unit connects/disconnects electrode terminals of all the battery modules to each other. Female electrode bodies electrically connected to power supply terminals of the respective battery modules are collectively positioned in a limited area and are arranged at equal intervals on the safety plug unit connecting base. An output voltage of each battery module is set to be lower than 50V to reduce the risk of injury during use, inspection or maintenance of the high voltage power supply device and to downsize the device.