Panasonic Intellectual Property Management Co., Ltd.

Sanyo Electric Co., Ltd.

Panasonic Holdings Corporation

Panasonic Energy Co., Ltd.

Takashi Iida

Shinya Nishikawa

Changhui Yang

Takashi Matsuda

Tohru Watanabe

Kazufumi Nishikawa

Masaharu Amaike

Haruo Hatanaka

Tomokazu Sada

Ryosuke Nagase

Naoki Chiba

Jun Yamasaki

Yusuke Itakura

Masaaki Takegata

Kohji Matsumura

Shigeyuki Yamakita

An information processing method, by a computer, includes: instructing a charger for charging a battery to: repeat a charge control including a set of charging having a first interval and charging suspension having a second interval; and finish the charge control when a charge amount reaches a predetermined amount; and acquiring operational data indicating a voltage and a charge capacity of the battery at an end time of each second interval of the charge control.

Information processing method, and charge control device

An information processing device acquires power consumption information indicating information corresponding to a power consumption amount per use unit of an electric apparatus driven by a battery; acquires initial capacity information indicating an initial capacity of the battery; calculates a first end of life of the battery on the basis of the power consumption information and the initial capacity information; acquires a second end of life of the battery set according to characteristics of the battery; and outputs a shorter one of the first end of life and the second end of life as a third end of life of the battery.

Information processing method and information processing system

An information processing device acquires charge/discharge information indicating a charge/discharge amount per unit period of a battery having a plurality of cells; acquires first relationship information indicating a relationship between the charge/discharge amount per the unit period and a deterioration degree of the battery; acquires second relationship information indicating a relationship between an elapsed time or the charge/discharge amount, and a voltage difference generated between the plurality of cells; acquires first cost information indicating a first cost generated by deterioration of the battery and second cost information indicating a second cost required for reducing the voltage difference; and determines, on the basis of the charge/discharge information, the first and second relationship information, and the first cost and second information, work timing at which the work in a charge/discharge plan is performed, the work timing being timing at which a sum of the first and second cost satisfies a predetermined requirement.

Information processing method, and information processing system

An information processing method includes: acquiring a weight of an electric mobile body; acquiring an amount of power consumption of the mobile body for each of numbers of one or more batteries mounted on the mobile body, the amount of power consumption being calculated based on the number of batteries; calculating a degradation cost of batteries for each of the numbers of the one or more batteries, the degradation cost being calculated based on the amount of power consumption and on the number of batteries; calculating a charging cost for each of the numbers of the one or more batteries, the charging cost being calculated based on the weight; and determining a number of batteries to be actually mounted on the mobile body, in accordance with the degradation cost and the charging cost, and outputting the number of batteries to be mounted.

Information processing method, information processing device, and information processing program

In a calculation system, a data acquisition unit is configured to acquire operation data of a battery, the operation data including at least voltages and currents measured by a management device at a plurality of time points, and states of charge (SOCs) estimated based on at least one of the voltages and the currents, the management device being configured to manage the battery. An extraction unit is configured to, extract, as sample data, a set of an SOC and a voltage from sets of the SOCs and the voltages the plurality of time points included in the operation data in a period in which the battery is regarded as resting, the period being specified based on the currents. An estimation unit is configured to estimate an SOC-open circuit voltage (OCV) characteristic of the battery based on the extracted sample data.

Calculation system, battery characteristic estimation method, and battery characteristic estimation program

A voltage of a battery cell is measured, and a current flowing through the battery cell is measured. An open circuit voltage (OCV) of the battery cell is estimated based on the measured voltage, the measured current, and an equivalent circuit model based on electrochemistry of the battery cell. At least one of a positive electrode and negative electrode of the battery cell is a mixed electrode containing a plurality of materials. The equivalent circuit model is a model including a diffusion resistance component for each of the plurality of materials for use in the positive electrode and the negative electrode.

Battery state estimation device, battery state estimation method, and battery system

An information processing method executed by a computer includes: acquiring an acceleration request for a mobile body that moves using a battery; calculating an output current in the battery based or the acceleration request; calculating a degradation degree of the battery based on the output current; generating an acceleration control instruction in response to the acceleration request in accordance with the degradation degree of the battery; and outputting the generated acceleration control instruction.

Information processing method, information processing device, and information processing system

Controller determines an output limit value that defines an upper limit of a current or power recommended for suppressing cell deterioration based on a voltage, a current, and a temperature of each cell, and notifies host controller in electric vehicle of the determined output limit value. When electric vehicle climbs a hill, controller calculates a current value or power value to be discharged from power storage unit, the current value or power value being required for electric vehicle to climb the hill at a speed not less than a set minimum speed, while suppressing an amount of deterioration of cells within an allowable range, and when the calculated current value or power value is larger than the output limit value, replaces the output limit value with the calculated current value or power value.

Power source system and management device

An acquisition unit of in-vehicle notification device mounted on electric vehicle acquires a discharge current value discharged from secondary battery in electric vehicle to motor for running in electric vehicle. According to the acquired discharge current value, a notification unit notifies the driver of information indicating an impact of a current driving condition by the driver of electric vehicle on degradation of secondary battery.

In-vehicle notification device, notification program, and calculation device

The power conditioner determines possible total power and working individual power to be in a range that possible individual power of each of the power supply units is not exceeded. The possible total power is determined from the possible individual power, of each of the power supply units, determined based on the battery information detected by each of the unit controllers, collected by a master controller from each of the unit controllers. The working individual power is determined based on a power deviation indicating a difference of charging and discharging power between the power supply units. The power conditioner causes charging and discharging of each of the power supply units within the calculated working individual power.

Power supply system, control system and power control method for power supply system

A voltage of a battery cell is measured, and a current flowing through the battery cell is measured. An open circuit voltage (OCV) of the battery cell is estimated based on the measured voltage, the measured current, and an equivalent circuit model based on electrochemistry of the battery cell, and a state of charge (SOC) of the battery cell is estimated based on the estimated OCV, SOC-OCV characteristics on a charge side of the battery cell, and SOC-OCV characteristics on a discharge side of the battery cell. At least one of a positive electrode and negative electrode of the battery cell is a mixed electrode containing a plurality of materials. Estimated is a current flowing through a material in which capacity-OCV characteristics are different between the charge side and the discharge side, the material being included in the plurality of materials contained in the mixed electrode, and a ratio between the SOC-OCV characteristics on the charge side and the SOC-OCV characteristics on the discharge side is determined based on the current.

A voltage measurer measures a voltage of a battery cell. A controller controls charging-discharging of the battery cell. The controller performs control to apply a reverse current for canceling a polarization voltage of the battery cell through the battery cell after the completion of charging-discharging of the battery cell. For example, after the charging-discharging of the battery cell completes, the controller sets a current command value, in a power converter, that instructs flow of a reverse current of a preset value for a preset time.

Battery system and battery management device for cancelling polarization voltage by applying a reverse current

A voltage detector detects a voltage of each cell of a plurality of cells that are series-connected. A plurality of discharge circuits are respectively parallel-connected to the plurality of cells. A controller performs a control to equalize voltages or capacities of the plurality of cells to a target value by controlling discharge time of the plurality of discharge circuits, based on the voltages of the plurality of cells detected by the voltage detector. The controller sets the target value higher as an amount of change in the voltages of the plurality of cells in a predetermined period is larger.

Management device, power storage system

A power storage unit includes a plurality of power storage module groups connected in parallel, each having a plurality of power storage modules connected in series or in series and parallel. A plurality of temperature adjustment units is installed in each of the power storage module groups constituting the power storage unit, and cools or heats the power storage module groups. A management unit controls the plurality of temperature adjustment units corresponding to each of the power storage module groups to make resistances of the plurality of power storage module groups come close.

Power storage system and management device

A smoothing unit smoothes a detected voltage of each power storage block based on previous data during a certain period. A calculator calculates a difference between a smoothing voltage of one power storage block in the n power storage blocks and a representative value of the smoothing voltages of the other power storage blocks or all the power storage blocks. A determination unit determines a power storage block whose difference against the representative value enlarges more than or equal to a set value during a predetermined period as a power storage block containing an abnormal power storage cell.

Growing community of inventors

Hyogo, Japan

Takashi Iida