Volvo Truck Corporation

Ud Trucks Corporation

Volvo Lastvagnar Ab

Volvo Lastvagnar Aktiebolag

Takayuki Tsuchiya

Kunihiko Hikiri

Yoshiaki Yamada

Noriaki Miyake

Shigemi Kobayashi

Koichi Itani

Masayuki Nakane

Hiroshi Toyama

Kouichi Itani

A charge/discharge system includes a controller to control an electric power converter placed between a capacitor and a secondary battery connected in parallel. The controller includes: a request power calculation unit configured to calculate request input/output power for the electric motor generator based on current and voltage of the capacitor and input output current of the electric power converter; a capacitor discharging bias factor map configured to specify a ratio of electric power to be supplied from the capacitor to the electric motor generator to the request input power of the electric motor generator; a capacitor charging bias factor map configured to specify a ratio of electric power to be stored in the capacitor from the electric motor generator to the request output power of the electric motor generator; and a subtraction unit configured to calculate charge/discharge power of the secondary battery by subtracting, from the request input/output power, the charge/discharge power of the capacitor.

Charge/discharge system

A charge/discharge system includes first and second electric chargers that supplies electric power to a motor generator and charges electric power generated by the motor generator, an electric power converter that complementarily performs charging/discharging between the first and second electric chargers, and a controller. The controller controls the electric power converter based on charging conditions of the first and second electric chargers such that electric power charged in the first electric charger is charged in the second electric charger, or electric power charged in the second electric charger is charged in the first electric charger.

A storage apparatus includes a plurality of storage cells connected in series. Each storage cell comprises a storage element that stores a charge, a container that houses the storage element, a reception antenna capable of receiving power transmitted from a transmission antenna of a feeding facility provided in a wireless power transfer system, and a charging control circuit that charges the storage element using the power received by the reception antenna. The plurality of storage cells are charged concurrently and wirelessly, and therefore charging can be performed on all of the storage cells without overcharging or undercharging.

Power storage apparatus

A power supply device for supplying power to a load by combining a secondary battery and a capacitor includes a switching element which switches the supply of power to the load from the capacitor, a DC-DC converter which enables a voltage of the capacitor to be stepped up and supplied to the load and a control unit which enables power to be supplied to the load by pulse-controlling the switching element, controlling the DC-DC converter to output a pulse current alternately with the switching element and combining the alternately output pulse currents if the voltage of the capacitor drops below a minimum voltage capable of driving the load.

Power supply device

A power supply device for supplying power to a load by combining a secondary battery and a capacitor includes a bypass switch which enables power to be directly supplied to the load from the capacitor by being switched to a connected state when a voltage of the capacitor is a voltage capable of driving the load, and a first DC-DC converter which enables the voltage of the capacitor to be stepped up and supplied to the load when the voltage of the capacitor drops below a minimum voltage capable of driving the load.

A power supply device for supplying power to a load by combining a secondary battery and a capacitor connected in parallel to the secondary battery includes an insulation type DC-DC converter with a primary coil connected in parallel to the secondary battery and configured to accumulate energy by a current supplied from the secondary battery and a secondary coil connected in series to the capacitor and configured such that an induction current flows therein by the accumulated energy from the primary coil.

Power supply device for supplying power to a load by combining a secondary battery and a capacitor

A storage apparatus comprises a plurality of storage cells connected in series. Each storage cell comprises a storage element that stores a charge, a container that houses the storage element, a reception antenna capable of receiving power transmitted from a transmission antenna of a feeding facility provided in a wireless power transfer system, and a charging control circuit that charges the storage element using the power received by the reception antenna. The plurality of storage cells are charged concurrently and wirelessly, and therefore charging can be performed on all of the storage cells without overcharging or undercharging.

A power supply device supplies power to a load by combining a secondary battery and a capacitor connected in parallel to the secondary battery. The power supply device includes an insulation type DC-DC converter with a primary coil connected in parallel to the secondary battery and configured to accumulate energy by a current supplied from the secondary battery and a secondary coil configured such that an induction current flows thereinto from the primary coil by the accumulated energy, and a switching circuit configured to selectively connect the secondary coil in series to the capacitor in forward and opposite directions.

An electric storage cell includes a film-like casing configured to house a layered charge collector and electrolyte, and an electrode terminal connected to the charge collector and exposed to an outside of the film-like casing, the electric storage cell being chargeable/dischargeable using the electrode terminal, wherein bending portions of the film-like casing are formed in parallel.

Electric storage cell

An accessory drive mechanism for a hybrid vehicle, capable of operating accessories irrespective of the travel state of the vehicle, and also capable of smoothly switching between the power which is transmitted from the traveling motor side and the power which is transmitted from the accessory drive motor side. The accessory drive mechanism is provided with a drive power take-off mechanism () for taking out the power from a travel drive system (D). An accessory () is connected to the drive power take-off mechanism (). A first one-way clutch (C) which can transmit the power only to the accessory () side is disposed between the drive power take-off mechanism () and the accessory (). An accessory driving motor (an auxiliary motor ()) is connected to the side of the accessory () which is on the opposite side from the drive power take-off mechanism (). A second one-way clutch (C) which can transmit the power only to the accessory () side is disposed between the accessory () and the accessory driving motor ().

Growing community of inventors

Saitama, Japan

Takayuki Tsuchiya