Honda Motor Co., Ltd.

Jun Kudo

Hiroyuki Kanazawa

Takayuki Sakurai

Thomas Stephen Pontefract

Ayano Otogasako

Satoru Shinzaki

Keiichiro Honma

Keiichiro Homma

Naoya Sakakibara

A power calculation apparatus calculates an amount of power suppliable and demandable between a battery and a power grid. The power calculation apparatus includes a microprocessor and a memory connected to the microprocessor. The microprocessor is configured to perform: predicting the amount of power suppliable and demandable between the battery and the power grid at a predetermined point in time to calculate a prediction value of the amount of power suppliable and demandable; and switching a calculation logic to be applied to a calculation of the prediction value, based on a length of duration from a present point in time to the predetermined point in time.

Power calculation apparatus and power calculation method

A power calculation apparatus predicting and calculating an amount of power suppliable from a vehicle having a battery to a power grid via a connection apparatus, the power calculation apparatus includes a microprocessor and a memory connected to the microprocessor. The microprocessor is configured to perform: predicting a position of the vehicle after a predetermined duration; predicting a degree of likelihood of connection of the vehicle to the connection apparatus after the predetermined duration, based on a predicted position of the vehicle after the predetermined duration and the connection apparatus; and predicting the amount of power suppliable from the vehicle to the power grid after the predetermined duration, based on the degree of likelihood.

A power calculation apparatus includes a microprocessor and a memory. The microprocessor is configured to perform: acquiring a power amount information regarding amounts of power input to and output from a plurality of vehicles, the amounts of power being detected by a plurality of measuring instruments provided in the plurality of vehicles or interposed between a power grid and the plurality of vehicles; classifying the plurality of measuring instruments based on errors possessed by the plurality of measuring instruments to set a plurality of groups; and calculating a total power input and output in each of the groups, based on the power amount information. The setting the plurality of groups includes setting the plurality of groups such that a mean value of errors of amounts of power in the groups is a predetermined value or less.

A power calculation apparatus calculating an amount of power suppliable to a power system by an energy source connectable, at a connection point, to the power system and capable of power generation and power storing, the power calculation apparatus includes: a microprocessor and a memory connected to the microprocessor, wherein the microprocessor is configured to perform: specifying a position of the connection point of the energy source in connection with the power system; acquiring a capacity information indicating a power generation capacity or a remaining storage capacity of the energy source; and calculating an amount of power suppliable by the energy source to the power system in an area within a predetermined range including the connection point, based on the capacity information and the position of the connection point.

A power transmission management apparatus includes a first connector electrically connectable to energy storages respectively provided in transportation units, a second connector electrically connectable to an external power system. A processor is configured to obtain charge state information, obtain power system request information to be input to or output from the external power system, control power transmission between the first connector and the second connector according to the power system request information, determine whether a degree of variation in the charging states in the energy storages is greater than or equal to a threshold value, and control power transmission between at least two among the energy storages to reduce the degree of variation before controlling the power transmission between the first connector and the second connector according to the power system request information if the degree of variation is determined to be greater than or equal to the threshold value.

Power transmission management apparatus and power transmission method

A charging control device includes a charging current control unit which sets a target value (Isp) of a charging current from an external power supply to a high-voltage battery, a charging current adjusting circuit which adjusts the charging current to the Isp, a supply voltage sensor which detects a supply voltage from the external power supply to the high-voltage battery, and a supply voltage monitoring unit which detects or predicts presence or absence of a decrease in the supply voltage from a predetermined normal charging voltage using an output of the supply voltage sensor, where when the decrease is not detected or predicted, the Isp is set to a predetermined normal target value, and when the decrease is detected or predicted, the Isp is changed to be equal to or lower than the normal target value and maintained at a value at which the supply voltage reaches a determination voltage.

Charging control device

A charging/discharging device includes an electricity storage unit provided in transport equipment, a power conversion unit for performing conversion of power exchanged between the electricity storage unit and an external power system, and a control unit for controlling an operation of the power conversion unit in accordance with a reception signal. A server device that manages charge/discharge of the electricity storage unit performs demand/supply prediction of power in the power system, decides a time, at which discharge of the electricity storage unit to the power system or charge of the electricity storage unit by power supplied from the power system is performed, and transmits an instruction including the decided time, at which the discharge or the charge is performed, to the charging/discharging device.

Server device

A charging/discharging device includes an electricity storage unit provided to a transport equipment, a power conversion unit that performs conversion of power exchanged between the electricity storage unit and an external power system, a reception unit that receives an instruction transmitted from a server device that decides a time at which discharge of the electricity storage unit to the power system or charge of the electricity storage unit by power supplied from the power system is performed, the instruction including the time at which the discharge or the charge is performed, and a control unit that starts up or stops based on the time indicated by the instruction received in the reception unit and controls an operation of the power conversion unit.

Charging/discharging device and charge/discharge control method for controlling charge or discharge of an electricity storage unit

An energy storage system includes an energy storage provided in a transportation unit, a connector electrically connectable to an external power transmission management apparatus, a power transmission circuit, and a processor. The processor is configured to control the power transmission circuit in accordance with an output from the external power transmission management apparatus to perform power transmission between the energy storage and an external power system, and control the power transmission circuit in accordance with an output from the external power transmission management apparatus, if a degree of variation in charging states in the energy storage and one or more external energy storages is greater than or equal to a threshold value, to perform power transmission between the energy storage and the one or more external energy storages to reduce the degree of variation before performing the power transmission between the energy storage and the external power system.

Energy storage system, transportation unit, and method of controlling energy storage system

A V2G system includes: a power system; a charging/discharging device including an electricity storage unit, a power conversion unit that converts power transferred between the electricity storage unit and the power system, a reception unit, and a control unit that controls an operation of the power conversion unit based on a received signal; and a server device that manages charging and discharging of the electricity storage unit. The server device determines a period of time during which power is discharged from the electricity storage unit to the power system or during which the electricity storage unit is charged using power supplied from the power system, and transmits an instruction including the period of time to the charging/discharging device. The control unit of the charging/discharging device starts up or stop based on the period of time indicated by the instruction from the server device.

V2G system and charge/discharge control method based on an estimated power supply-demand state, a minimum trading unit of an amount of power, and a total amount of power secured for selling to a power system

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Saitama, Japan

Jun Kudo