Sanyo Electric Co., Ltd.

Kaoru Nakajima

Hideki Sakata

Nobuyuki Ohsumi

Akinobu Tsunesada

A first power storage portion stores power generated by a generator in a vehicle, and supplies power to a motor for starting an engine and an electric device in the vehicle. A second power storage portion is connected to the first power storage portion in parallel, and stores power generated by the generator, and supplies power to the electric device in the vehicle. The first power storage portion and the second power storage portion are connected each other in parallel. A first switch is inserted in a path between the first power storage portion and the second power storage portion. A diode is connected in parallel with the first switch such that a cathode side thereof is connected to the second power storage portion side. A second switch is provided between the path and the second power storage portion.

Vehicle power supply device

A first power storage portion is configured to store power generated by a generator in a vehicle, and to supply power to a motor for starting an engine and an electric device in the vehicle. A second power storage portion is connected to the first power storage portion in parallel, and configured to store power generated by the generator, and to supply power to the electric device in the vehicle. A first switch is inserted in a path between those portions. A diode is connected in parallel with the first switch such that a cathode side thereof is connected to the second power storage portion side. The controlling portion monitors a voltage of the first power storage portion and a voltage of the second power storage portion, and detects an abnormal state of the switch by comparing a voltage difference therebetween with a forward voltage drop of the diode.

Power supply device for vehicles

A power supply device comprises a lead-acid battery disposing a plurality of cells in a battery case of a rectangular parallelepiped shape having a pair of facing walls and a pair of end surface walls at the circumference of a rectangular bottom surface plate, and a power storage device connected in parallel to the lead-acid battery. The power storage device has a larger storage capacity by regenerative braking than that of the lead-acid battery, and the power storage device has an external case having a heat radiation plate disposed in a thermally connected state to the facing wall of the lead-acid battery, and the heat radiation plate is thermally connected to the facing wall of the lead-acid battery.

Power supply device for vehicle performing regenerative braking

A vehicle comprises an engine, a starter motor, and a starter battery supplying power to the starter motor, further an auxiliary power storage system connected in parallel to the starter battery, an alternator for generating regenerative power and charging the starter battery and the auxiliary power storage system, an engine room for disposing the engine, and a cabin for disposing the auxiliary power storage system. The auxiliary power storage system comprises a power storage portion for electric equipment connected in parallel to the starter battery through a relay, and a relay controlling circuit configured to carry out the ON control of the relay at power generation of the alternator, and the OFF control of the relay at restarting the engine in a state of idling stop, and further the relay is disposed in the engine room.

Vehicle performing idling stop

An in-vehicle battery system comprises a first power storage module including a lead-acid battery, and a second power storage module including a power storage portion having a higher energy density than that of the lead-acid battery. The lead-acid battery and the power storage portion are electrically connected in parallel to a power generating portion which converts a regenerative energy to electric power. The first power storage module and the second power storage module are provided in an engine room of a vehicle. The second power storage module is disposed more distantly than the first power storage module from an engine.

Growing community of inventors

Hyogo, Japan

Kaoru Nakajima