Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Yasuo Yamada

Hirokazu Oguma

Yoshihiro Kanamaru

Minoru Nagasawa

Arata Ohishi

Naoki Maruno

Kazuhiro Araki

Noritaka Sekiya

Kei Kuroki

Yoshihisa Kato

A power storage system includes a first battery including two power storages, and a switch unit which switches between two voltage states in series and in parallel, a three-phase motor having a neutral point, an inverter connected on a power transmission path between the first battery and the three-phase motor, a DC power supply circuit connected to a connection portion on a power transmission path between the inverter and the first battery, a branch circuit branched from the DC power supply circuit on a positive side thereof and connected to a coil of one phase in the three-phase motor, a capacitor, a pre-charge circuit connected to a power transmission path between the inverter and the first battery, a converter connected to the pre-charge circuit, and a second battery connected to the converter and having a voltage lower than voltages of the first battery in the two voltage states.

Power storage system

A vehicle control device includes processor configured to execute computer-readable instructions to perform. The processor is configured to acquiring a state of a first battery and a state of a second battery, acquiring at least first actual output power of the first battery, calculating a first upper power limit value based on the state of the first battery, calculating a second upper power limit value based on the state of the second battery, and controlling a power conversion process of a power convertor based on the calculated upper power limit values, requested power from a vehicle to be output to a motor, and the first actual output power. The controlling of the power conversion process includes, when output instruction content for iteratively issuing an instruction is determined, calculating the second requested power obtained by correcting currently requested power based on a difference between previously requested power and the first actual output power.

Vehicle control device, vehicle control method, and storage medium

A vehicle control device includes a processor configured to execute computer-readable instructions to perform. The processor is configured to acquiring a state of a first battery and a state of a second battery having lower capacity and higher power than the first battery, calculating a first upper power limit value based on the state of the first battery, calculating a second upper power limit value based on the state of the second battery, and calculating a power output ratio between amounts of electric power to be supplied from the first battery and the second battery to a motor that outputs motive power for traveling based on the first upper power limit value and the second upper power limit value, and controlling electric power to be output to the motor based on a traveling mode of a vehicle, a maximum driving force in the motor, and the power output ratio. The controlling of the electric power includes changes the maximum amount of electric power based on whether or not the traveling mode is a first traveling mode in which traveling performance has higher priority than that in another traveling mode.

A power supply system includes: a first power circuit having a first battery and a first power line; a second power circuit having a second battery and a second power line; a voltage converter; a power converter; a first voltage acquisition unit which acquires a first closed circuit voltage lower limit CCVminof the first battery; a second voltage acquisition unit which acquires a second closed circuit voltage lower limit CCVminof the second battery; and a power control unit which operates the second power circuit based on a requested power, in which the power control unit isolates the second battery from the second power lines, in a case of a voltage difference between the first closed circuit voltage lower limit CCVminand the second closed circuit voltage lower limit CCVminbecoming less than a first voltage threshold value A while output limitation of the second battery is being requested.

Power supply system

A power supply system includes: a first power circuit having a first battery, a second power circuit having a second battery, a voltage converter which converts voltage between the first power circuit and the second power circuit, a power converter which converts power between the first power circuit and the drive motor, a power control unit which controls charge/discharge of the first and second batteries by operating the voltage converter and the power converter, a first voltage parameter acquisition unit which calculates an effective value for the closed circuit voltage of the first battery as a first voltage parameter, a second voltage parameter acquisition unit which calculates the static voltage of the second battery as a second voltage parameter, in which the power control unit causes power to discharge from the second battery so that the second voltage parameter becomes no more than the first voltage parameter.

A power supply system includes power circuit which connects first and second batteries with a drive motor, and a management ECU which controls transfer of power between the batteries and the drive motor. The management ECU limits the output power of the second battery to no more than a second output upper limit, during combined output travel which drives the drive motor by way of the combined output of the first and second batteries. In addition, the management ECU sets the second output upper limit to a second maximum output of the second battery in the case of the first SOC of the first batter being greater than a remaining amount warning threshold, and sets the second output upper limit to a range extending upper limit which is smaller than the second maximum output, in the case of the first SOC being less than the remaining amount warning threshold.

An exhaust gas purifying device is provided with an exhaust manifold having a collecting section, and a catalytic converter provided downstream of the exhaust manifold. The catalytic converter has upstream and downstream catalysts. The upstream catalyst includes a carrier, a first layer located on the carrier containing Pd, a second layer located on the first layer containing Rh, and a third layer located on the second layer containing Pd. The downstream catalyst includes a carrier, a first layer located on the carrier containing Pd, and a second layer located on the first layer containing Pt and Rh. The collecting section connects to the catalytic converter after passing, in order from the upstream side, through a flow regulating path and a neck section which is provided in the flow regulating path. The flow regulating path has a predetermined length and a width which is gradually reduced to the downstream side.

Exhaust gas purifying device

A remaining charge detection device for a power storage unit including a current detection unit which detects the current value of a charging current and a discharging current of a power storage unit; a voltage detection unit which detects the voltage value of a terminal voltage of the power storage unit; and a current accumulation remaining charge calculation means which accumulates the current value detected by the current detection unit to obtain an accumulated charging current and discharging current and calculates a remaining charge of the power storage unit. The remaining charge detection device further includes a no-load state detection unit which detects a no-load state of the power storage unit, and a remaining charge for calibration calculation unit which calculates a remaining charge for calibration for the remaining charge of the power storage unit.

Growing community of inventors

Saitama, Japan

Yasuo Yamada