JP7136785B2 - POWER SYSTEM, POWER STORAGE DEVICE, CONTROL METHOD OF POWER SYSTEM, AND MOVING OBJECT - Google Patents

Description

Cross-reference to related applications

This application claims priority from Japanese Patent Application No. 2017-166071 filed in Japan on August 30, 2017, and the entire disclosure of this earlier application is incorporated herein for reference.

The present disclosure relates to a power system, a power storage device, and a method of controlling the power system.

Conventionally, there is known a technique of selling electric power from a consumer facility to a commercial power source. For example, Patent Literature 1 discloses an energy system that sells power from a private power storage device to the grid side.

JP 2012-186963 A

A power system according to an embodiment of the present disclosure includes a power storage device and a power device. The power device receives supply of power from the power storage device. When the power storage device and the power device are connected, the power storage device or the power device supplies power received from the power storage device based on charge/discharge history information related to charging/discharging of the power storage device. to control. The charge/discharge history information includes a first parameter that increases according to the amount of power charged from the first charging device that satisfies a predetermined condition, and increases according to the amount of power that is charged from the second charging device that does not satisfy the predetermined condition. and a second parameter. The power storage device or the power device prohibits the power device from accepting supply of power from the power storage device when the second parameter is not zero. The predetermined condition includes a condition that the charging device supplies electric power generated using renewable energy and is associated with the user of the power storage device. The first charging device stores a correspondence relationship between the user and the first charging device when owned or borrowed by the user.

A power storage device according to an embodiment of the present disclosure supplies power to a power device. The power storage device includes a control unit. The control unit, when connected to the power device, controls supply of power received by the power device from the power storage device based on charge/discharge history information relating to charge/discharge of the power storage device. The charge/discharge history information includes a first parameter that increases according to the amount of power charged from the first charging device that satisfies a predetermined condition, and increases according to the amount of power that is charged from the second charging device that does not satisfy the predetermined condition. and a second parameter. The power storage device or the power device prohibits the power device from accepting supply of power from the power storage device when the second parameter is not zero. The predetermined condition includes a condition that the charging device supplies electric power generated using renewable energy and is associated with the user of the power storage device. The first charging device stores a correspondence relationship between the user and the first charging device when owned or borrowed by the user.

A power system control method according to an embodiment of the present disclosure is a power system control method including a power storage device and a power device. The power device receives supply of power from the power storage device. In the control method of the power system, when the power storage device or the power device is connected to the power storage device, the power device receives power from the power storage device and controls the charging and discharging of the power storage device. including a step of controlling based on the charge/discharge history information regarding. The charge/discharge history information includes a first parameter that increases according to the amount of power charged from the first charging device that satisfies a predetermined condition, and increases according to the amount of power that is charged from the second charging device that does not satisfy the predetermined condition. and a second parameter. The power system control method includes the step of prohibiting the power storage device or the power device from accepting supply of power from the power storage device when the second parameter is not zero. The predetermined condition includes a condition that the charging device supplies electric power generated using renewable energy and is associated with the user of the power storage device. The power system control method further includes storing a correspondence relationship between the user and the first charging device when the first charging device is owned or rented by the user.
A mobile object according to an embodiment of the present disclosure is a mobile object equipped with a power storage device that supplies electric power to a power device. When the power storage device and the power device are connected, the power storage device or the power device supplies power received from the power storage device based on charge/discharge history information related to charging/discharging of the power storage device. to control. The charge/discharge history information includes a first parameter that increases according to the amount of power charged from the first charging device that satisfies a predetermined condition, and increases according to the amount of power that is charged from the second charging device that does not satisfy the predetermined condition. and a second parameter. The power storage device or the power device prohibits the power device from accepting supply of power from the power storage device when the second parameter is not zero. The predetermined condition includes a condition that the charging device supplies electric power generated using renewable energy and is associated with the user of the power storage device. The first charging device stores a correspondence relationship between the user and the first charging device when owned or borrowed by the user.

1 is a diagram showing a schematic configuration of a power system according to an embodiment of the present disclosure; FIG. 2 is a block diagram showing a schematic configuration of the power storage device of FIG. 1; FIG. 2 is a block diagram showing a schematic configuration of the power device of FIG. 1; FIG. 2 is a block diagram showing a schematic configuration of the charging device of FIG. 1; FIG. It is a figure which shows the example of charge/discharge log|history information. 4 is a sequence diagram showing operations of a power storage device and a power device according to an embodiment of the present disclosure; FIG. FIG. 4 is a sequence diagram showing operations of a power storage device and a power device according to another embodiment of the present disclosure;

Conventionally, it has been desired to improve the convenience of technology for selling electric power. The present disclosure relates to an electric power system, a power storage device, and a control method of the electric power system that improve the convenience of technology for selling electric power. According to the power system, power storage device, and power system control method according to an embodiment of the present disclosure, the convenience of the technology for selling power is improved. Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

(Power system configuration)
FIG. 1 is a diagram showing a schematic configuration of a power system 1 according to an embodiment of the present disclosure. The power system 1 includes a power storage device 10 , a power device 20 , a charging device 30 and a mobile object 40 . The numbers of power storage devices 10, power devices 20, charging devices 30, and moving bodies 40 may be determined arbitrarily.

The power storage device 10 is used, for example, by a user who is a consumer. As will be described later, the power storage device 10 is charged by a charging device 30 installed at, for example, the user's home or a charging station. The power storage device 10 may supply power to a load device installed in the user's home. Power storage device 10 has portability. In this embodiment, the power storage device 10 is mounted on a mobile object 40, which will be described later. For example, power supplied from the power storage device 10 may be consumed by the mobile object 40 . Specifically, the electric power supplied from power storage device 10 to mobile object 40 may be consumed for movement of mobile object 40, driving of accessories mounted on mobile object 40, and the like. In another embodiment, power storage device 10 may be portable by the user. Details of the power storage device 10 will be described later.

The power device 20 may be installed anywhere. For example, power device 20 may be installed in any facility other than the home of the user of power storage device 10 . Specifically, power device 20 may be installed in facilities such as convenience stores, supermarkets, department stores, restaurants, hospitals, or parking lots. Power device 20 receives supply of power from power storage device 10 . As will be described later, the user may be rewarded according to the amount of power supplied from the power storage device 10 to the power device 20 . Hereinafter, supplying power from the power storage device 10 to the power device 20 is also referred to as selling power by the power storage device 10 . In the present disclosure, “selling power” includes supplying power in exchange for money, and supplying power considering the power itself as a virtual currency. The amount of power supplied from the power storage device 10 to the power device 20 is also referred to as the amount of power sold. The power device 20 may supply the electric power sold from the power storage device 10 to, for example, a load device or a storage battery provided in the facility where the power device 20 is installed. Power device 20 may function as a charger that charges power storage device 10 . In such a case, the power device 20 supplies power to the power storage device 10 from, for example, a commercial power source or a storage battery provided in the facility where the power device 20 is installed. Details of the power device 20 will be described later.

The charging device 30 may be installed at any location different from the installation location of the power device 20, for example. For example, the charging device 30 may be installed in the home of the user of the power storage device 10 or in a facility such as a charging station. Charging device 30 functions as a charger that charges power storage device 10 . Charging device 30 can supply electric power derived from renewable energy or exhaustible energy to power storage device 10 . Power from renewable sources may include, for example, power generated using energy such as solar, wind, hydro, or geothermal. Power from renewable energy may include power generated using fossil energy, such as oil, coal, or natural gas. Hereinafter, the charging device 30 that supplies electric power derived from renewable energy is also referred to as a first charging device 30a. For example, the charging device 30 connected to the photovoltaic power generation device can function as the first charging device 30a. Hereinafter, the charging device 30 that supplies power derived from exhaustible energy is also referred to as a second charging device 30b. For example, a charging device 30 connected to a commercial power source derived from exhaustible energy may function as a second charging device 30b. As will be described later, when the power storage device 10 is charged by the charging device 30, the power storage device 10 receives information that enables identification of whether the charging device 30 is the first charging device 30a or the second charging device 30b. remembered. Charging device 30 may supply power to any load device connected to charging device 30 . For example, charging device 30 and load equipment may be installed in the home of the user of power storage device 10 . Charging device 30 may function as an EMS (Energy Management System). Charging device 30 can supply power to at least one of power storage device 10 and a load device. The charging device 30 may supply power to the load device, for example, when the power storage device 10 is not connected. Details of the charging device 30 will be described later.

The moving body 40 is equipped with the power storage device 10 . Mobile object 40 may include any device that can be moved. The moving object 40 may or may not use the power supplied from the power storage device 10 to move. When not using power supplied from power storage device 10 for movement, mobile body 40 may be used simply to carry power storage device 10 . For example, the mobile object 40 may include a vehicle, a walking robot, a flying device, and the like. For example, vehicles may include electric vehicles, hybrid electric vehicles, gasoline vehicles, bicycles, and the like. For example, flying devices may include drones, multicopters, and the like. Mobile object 40 may be driven or steered by a user. At least some of the user operations related to driving or steering the mobile object 40 may be automated. The mobile object 40 may be autonomously movable without depending on user operation. In the present embodiment, an example in which the moving body 40 is an electric vehicle that moves using power supplied from the power storage device 10 will be described. The mobile body 40 may use at least part of the regenerated electric power generated by the regenerative braking to charge the power storage device 10 . Details of the moving body 40 will be described later.

A usage example of the power system 1 by a user will be described. The user charges the power storage device 10 mounted on the mobile object 40 by using the charging device 30 provided, for example, at the user's home or at a charging station. The user moves with the mobile body 40 to the facility where the power device 20 is installed. The user connects power storage device 10 and power device 20 to start selling power by power storage device 10 . When the power sale ends, the user is given a reward according to the amount of power sold. The content of the reward given to the user may be determined arbitrarily. For example, the reward may include money, virtual currency, points that can be used for a given service, and the like. For example, the reward may include the right to reduce the user's bill at the facility where the power device 20 is installed. Such facilities may include, for example, commercial facilities such as restaurants and electronics stores and their associated parking lots. Granting of the reward may be performed, for example, by issuing a ticket corresponding to the reward. Granting of the reward may be performed by storing electronic data corresponding to the reward in association with the user's identification information. In this embodiment, awarding of rewards is performed by power unit 20 . In other embodiments, awarding of rewards may be performed by an external server that can communicate with power device 20 via a communications network, such as the Internet. For example, when the user clicks a settlement start button on a smartphone application, the power device 20 ends the power receiving operation in response to communication from the external server. The power device 20 calculates a reward for the power sold from the power storage device 10 so far, and transmits the calculated reward to the external server. The external server creates a code image such as a bar code or QR code (registered trademark) corresponding to the reward and transmits it to the user's smart phone. The user can receive a reduction in payment by presenting the code image displayed on the smartphone, for example, when paying for a meal or purchasing a product.

In this way, a user using the power system 1 can sell the power stored in the power storage device 10, for example, at any place where the power device 20 is installed. Therefore, the opportunity for the user to sell power increases, and the convenience of the technology for selling power improves. In addition, since the use of the electric power accumulated in the power storage device 10 is promoted, the use efficiency of the electric power is improved for the user. Moreover, the user can be motivated to move to the place where the power device 20 is installed. Therefore, for example, economic activity of the user at the location is activated.

(Configuration of power storage device)
FIG. 2 is a block diagram showing a schematic configuration of power storage device 10 of FIG. In this embodiment, the power storage device 10 includes a storage battery 11 , a communication section 12 , a sensor section 13 , a storage section 14 and a control section 15 . In another embodiment, at least one of the storage battery 11, the communication unit 12, the sensor unit 13, the storage unit 14, and the control unit 15 may be provided in the moving body 40 on which the power storage device 10 is mounted.

Storage battery 11 includes any type of rechargeable battery. For example, the storage battery 11 may include lead-acid batteries, lithium-ion batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and the like.

The communication unit 12 may include a first interface that transmits and receives information and power to and from an external device. The first interface may include a module and a connector compatible with any standard regarding charging and discharging methods of the storage battery 11 . Standards for charging and discharging methods may include standards such as CHAdeMO (registered trademark) and USB (registered trademark). In this embodiment, the communication unit 12 can transmit and receive information and power to and from each of the power device 20 and the charging device 30 via the first interface. The communication unit 12 may include a second interface that transmits and receives information to and from an external device. The second interface may include a communication module that supports any communication standard via wire or wireless. The communication standard may include, for example, a communication standard via an in-vehicle network such as CAN (Controller Area Network). In this embodiment, the communication unit 12 can transmit and receive information to and from the moving object 40 via the second interface. The communication unit 12 may include, for example, a third interface that transmits and receives information to and from an external device via a communication network such as the Internet. The third interface may include, for example, a communication module compatible with any wireless communication standard. The communication unit 12 may be connected to an external server via the third interface and communication network to transmit and receive information on power and location. The communication unit 12 may receive more advanced service information from the server.

Sensor unit 13 includes one or more arbitrary sensors or sensing mechanisms. For example, the sensor unit 13 may include a charge/discharge power sensor and a remaining capacity sensor. The charge/discharge power sensor measures the current using, for example, a CT (Current Transformer) to detect the charge/discharge power amount of the storage battery 11 . For example, the charge/discharge power sensor may detect the amount of power sold when power is sold to the power device 20 . The charging/discharging power sensor may detect the charging power amount during charging by the charging device 30 . The remaining capacity sensor monitors the amount of discharge current and the amount of charge current of the storage battery 11 using CT, for example, and detects the remaining capacity. Any algorithm can be used to detect the remaining capacity. For example, a remaining capacity estimation algorithm such as a current integration method or an open-circuit voltage method may be employed to detect the remaining capacity.

Storage unit 14 includes one or more memories. For example, the storage unit 14 may include semiconductor memory, magnetic memory, optical memory, or the like. The storage unit 14 may function, for example, as a primary storage device or a secondary storage device. Storage unit 14 may store arbitrary information used for operation of power storage device 10 . For example, the storage unit 14 may store in advance a power storage device ID that uniquely identifies the power storage device 10 . The storage unit 14 may store charge/discharge history information, which will be described later.

Control unit 15 includes one or more processors. Processors may include general-purpose processors and special-purpose processors specialized for particular processes. In another embodiment, a processor such as an ECU (Electronic Control Unit) provided in the mobile object 40 may function as the control unit 15 . Control unit 15 controls the operation of power storage device 10 as a whole. A specific example of the operation of power storage device 10 will be described later.

(Configuration of power device)
FIG. 3 is a block diagram showing a schematic configuration of the power device 20 of FIG. 1. As shown in FIG. In this embodiment, the power device 20 includes a communication section 21 , a sensor section 22 , a storage section 23 and a control section 24 .

The communication unit 21 may include a first interface that transmits and receives information and power to and from an external device. In this embodiment, the communication unit 21 can transmit and receive information and power to and from the power storage device 10 via the first interface. The communication unit 21 may include a third interface that transmits and receives information to and from an external device via a communication network. The communication unit 21 may be connected to an external server via the third interface and the communication network to transmit and receive information related to charge/discharge history. According to such a configuration, for example, when the amount of past measurement data increases and cannot be stored in the storage unit 23 described later, at least part of the charge/discharge history information can be stored in the server. becomes.

Sensor portion 22 includes any one or more sensors or sensing mechanisms. For example, sensor unit 22 may include a charge/discharge power sensor. The charging/discharging power sensor measures current using, for example, a CT, and detects the amount of charging/discharging power of the power storage device 10 connected via the communication unit 21 . For example, the charge/discharge power sensor may detect the amount of power sold when power is sold to the power device 20 .

Storage unit 23 includes one or more memories. For example, the storage unit 23 may include semiconductor memory, magnetic memory, optical memory, or the like. The storage unit 23 may function, for example, as a primary storage device or a secondary storage device. Storage unit 23 may store arbitrary information used for operation of power device 20 .

Control unit 24 includes one or more processors. Processors may include general-purpose processors and special-purpose processors specialized for specific processes. The control unit 24 controls the operation of the power device 20 as a whole. A specific example of the operation of the power device 20 will be described later.

(Configuration of charging device)
FIG. 4 is a block diagram showing a schematic configuration of charging device 30 of FIG. The charging device 30 includes a communication section 31 , a sensor section 32 , a storage section 33 and a control section 34 .

The communication unit 31 may include a first interface that transmits and receives information and power to and from an external device. In this embodiment, the communication unit 31 can transmit and receive information to and from the power storage device 10 via the first interface. The communication unit 31 can transmit power to the power storage device 10 via the first interface. Specifically, the communication unit 31 of the first charging device 30 a can transmit power derived from renewable energy to the power storage device 10 . On the other hand, the communication unit 31 of the second charging device 30b can transmit power derived from exhaustible energy to the power storage device 10 . The communication unit 31 may include a third interface that transmits and receives information to and from an external device via a communication network. The communication unit 31 may connect to an external server via the third interface and the communication network to transmit and receive information about power. For example, when the charging device 30 is connected to the photovoltaic power generation device and the load device, the communication unit 31 may acquire information such as real-time weather information or past power generation results from the server as information on power. good. According to such a configuration, for example, when both the power storage device 10 and the load device are connected to the charging device 30, the charging device 30 gives priority to either the power storage device 10 or the load device based on the information on power. power can be distributed according to

Sensor portion 32 includes any one or more sensors or sensing mechanisms. For example, sensor unit 32 may include a charging power sensor. The charging power sensor measures current using a CT, for example, and detects the amount of charging power of the power storage device 10 connected via the communication unit 31 .

Storage unit 33 includes one or more memories. For example, the storage unit 33 may include semiconductor memory, magnetic memory, optical memory, or the like. The storage unit 33 may function, for example, as a primary storage device or a secondary storage device. Storage unit 33 may store arbitrary information used for operation of charging device 30 .

Control unit 34 includes one or more processors. Processors may include general-purpose processors and special-purpose processors specialized for specific processes. Control unit 34 controls the operation of charging device 30 as a whole. For example, when charging the power storage device 10, the control unit 34 may notify the power storage device 10 of which of the first charging device 30a and the second charging device 30b is the charging device 30 that performs charging.

(Composition of moving body)
A mobile object 40 shown in FIG. 1 includes one or more auxiliary devices, one or more processors, and an in-vehicle network. Auxiliaries may include, for example, an air conditioner, a navigation device, and the like. A processor may include an ECU, for example. The processor controls the overall operation of mobile unit 40 . For example, the processor may use at least part of the regenerative electric power generated by the regenerative braking of the moving body 40 to charge the power storage device 10 .

(Operation of power storage device and power device)
The operation of power storage device 10 and power device 20 will be specifically described. The operation is an operation related to selling power from power storage device 10 to power device 20 .

The control unit 15 of the power storage device 10 stores charge/discharge history information in the storage unit 14 each time the power storage device 10 is charged/discharged, for example. The charge/discharge history information may include any history relating to charge/discharge of power storage device 10 . For example, as shown in FIG. 5, the charge/discharge history information includes user ID, power storage device ID, date and time, charge/discharge power amount, attribute, remaining capacity, first parameter, and second parameter. include.

A user ID is information that can uniquely identify a user. The power storage device ID is information that can uniquely identify the power storage device ID as described above.

The date and time is a time stamp at which charging/discharging of power storage device 10 was performed. For example, when charging/discharging of the power storage device 10 is completed, the control unit 15 may store the date and time when charging/discharging is completed in the storage unit 14 .

The charge/discharge power amount is the charge/discharge power amount when the power storage device 10 is charged/discharged. In FIG. 5, the charging power amount is indicated by a positive numerical value, and the discharging power amount is indicated by a negative numerical value. For example, when charging/discharging of the power storage device 10 is completed, the control unit 15 may store the charge/discharge power amount detected using the sensor unit 13 in the storage unit 14 . At this time, the charge/discharge power amount may be calculated in consideration of the discharge efficiency and the charge efficiency. In the following description, when specific numerical values of charge/discharge power are used, the charge efficiency and the discharge efficiency are assumed to be 1.0 for the sake of simplification.

The attribute is information indicating a device that supplied charging power to power storage device 10 or a device to which power storage device 10 supplied discharging power. For example, the attribute may indicate either the power device 20, the first charging device 30a, the second charging device 30b, or the vehicle 40. For example, when the power storage device 10 is charged and discharged while the power storage device 10 and the power device 20 are connected, the control unit 15 may store the attribute as “power device” in the storage unit 14 . For example, when the power storage device 10 is charged while the power storage device 10 and the charging device 30 are connected, the control unit 15 causes the charging device 30 to perform the first charging based on the notification obtained from the charging device 30 . Either the device 30a or the second charging device 30b may be specified. Control unit 15 may store the attribute as “first charging device” or “second charging device” in storage unit 14 according to the identification result of charging device 30 . For example, when power storage device 10 is charged/discharged while power storage device 10 is not connected to power device 20 or charging device 30, control unit 15 stores the attribute as “moving object” in storage unit 14. You may

The remaining capacity is the remaining capacity of storage battery 11 when charging/discharging of power storage device 10 is completed. The control unit 15 may store the remaining capacity detected using the sensor unit 13 in the storage unit 14 .

The first parameter is a parameter corresponding to the amount of power derived from renewable energy in the remaining capacity of the storage battery 11 . The control unit 15 may increase the first parameter according to the charging power amount from the first charging device 30a. For example, the control unit 15 may increase the first parameter by the charging power amount from the first charging device 30a.

The second parameter is a parameter corresponding to the amount of power derived from exhaustible energy in the remaining capacity of the storage battery 11 . The control unit 15 may increase the second parameter according to the charging power amount from the second charging device 30b. For example, the control unit 15 may increase the charging power amount from the second charging device 30b.

As described above, power storage device 10 can also be charged by regenerative braking of moving body 40 . In this embodiment, the control unit 15 increases the second parameter according to the amount of power charged by the regenerative braking of the moving body 40 . For example, the control unit 15 may increase the second parameter by the amount of charge output by the regenerative braking of the moving body 40 . Such a configuration is based on the concept described below. That is, it is relatively rare for power storage device 10 to store only renewable energy-derived power, and power storage device 10 stores both renewable energy-derived power and exhaustible energy-derived power. Highly probable. Therefore, it can be considered that mobile body 40 consumes both renewable energy-derived power and exhaustible energy-derived power accumulated in power storage device 10 . The regenerative braking recovers part of the electric power consumed by the traveling of the mobile body 40 . Therefore, the electric power charged by regenerative braking can be considered to be part of the electric power derived from exhaustible energy. In the present embodiment, the second parameter increases according to the amount of electric power charged by the regenerative braking of the mobile object 40 . According to such a configuration, the accuracy of the first parameter corresponding to the amount of power derived from renewable energy in the remaining capacity of the storage battery 11 is improved.

In another embodiment, the control unit 15 may increase the first parameter according to the amount of electric power charged by the regenerative braking of the moving body 40 . Such a configuration is based on the concept described below. That is, the regenerative braking recovers part of the electric power consumed for running the moving body 40 as described above. Power recovered by regenerative braking differs from power derived from exhaustible energy, for example, in that the generation of power does not involve the emission of carbon dioxide. For this reason, it can be considered that the electric power charged by regenerative braking has a property closer to electric power derived from renewable energy than electric power derived from exhaustible energy. In another embodiment, the first parameter increases according to the amount of electric power charged by the regenerative braking of the mobile object 40 . Therefore, the accuracy of the second parameter corresponding to the amount of power derived from exhaustible energy in the remaining capacity of the storage battery 11 is improved.

The control unit 15 may decrease the first parameter according to the amount of power sold from the power storage device 10 to the power device 20 . For example, the control unit 15 may decrease the first parameter by the amount of power sold to the power device 20 . Such a configuration corresponds to preferentially using power derived from renewable energy in selling power from the power storage device 10 to the power device 20 .

When power storage device 10 is discharged other than by selling power to power device 20, control unit 15 may decrease the total value of the first parameter and the second parameter according to the amount of discharged power. When decreasing the total value of the first parameter and the second parameter, for example, if the second parameter is greater than zero, the control unit 15 may decrease the second parameter preferentially over the first parameter. Such a configuration corresponds to preferentially using power derived from exhaustible energy in discharging from the power storage device 10 to the electric power device 20 other than selling power.

Specific contents indicated by the charge/discharge history information in FIG. 5 will be described. In the explanation of the charge/discharge history information, the value of each power amount is a provisional numerical value for explanation and does not necessarily match the actual numerical value.

The first line of the charge/discharge history information indicates the initial state of power storage device 10 . Specifically, in the initial state, the remaining capacity of power storage device 10 is 0 kWh. The first and second parameters are each 0 points.

The second line of the charge/discharge history information indicates that 30 kWh of power was charged from the first charging device 30a to the power storage device 10 at 8:00 on July 28th. The remaining capacity of power storage device 10 increases from 0 kWh to 30 kWh. Since the charging is performed by the first charging device 30a, the first parameter increases from 0 points to 30 points. On the other hand, the second parameter remains 0 points.

The third line of the charge/discharge history information indicates that 5 kWh of electric power was discharged from the power storage device 10 to the moving body 40 at 9:00 on July 28th. The remaining capacity of power storage device 10 is reduced from 30 kWh to 25 kWh. The total value of the first parameter and the second parameter is reduced from 30 points to 25 points because it is a discharge other than power selling. Specifically, since the second parameter is 0 points, the first parameter is reduced from 30 points to 25 points. On the other hand, the second parameter remains 0 points.

The fourth line of the charge/discharge history information indicates that at 9:01 on July 28, power storage device 10 was charged with a power amount of 1 kWh by regenerative braking of moving body 40 . The remaining capacity of power storage device 10 is increased from 25 kWh to 26 kWh. The second parameter is increased from 0 points to 1 point because it is charging by regenerative braking. On the other hand, the first parameter remains 25 points.

The fifth line of the charge/discharge history information indicates that 20 kWh of power was charged from the second charging device 30b to the power storage device 10 at 10:00 on July 28th. The remaining capacity of power storage device 10 is increased from 26 kWh to 46 kWh. Since it is charging by the second charging device 30b, the second parameter increases from 1 point to 21 points. On the other hand, the first parameter remains 25 points.

The sixth line of the charge/discharge history information indicates that 5 kWh of electric energy was discharged from the power storage device 10 to the moving body 40 at 11:00 on July 28th. The remaining capacity of power storage device 10 is reduced from 46 kWh to 41 kWh. The total value of the first parameter and the second parameter is reduced from 46 points to 41 points because it is a discharge other than power selling. Specifically, since the second parameter is greater than 0 points, the second parameter that takes precedence over the first parameter is reduced from 21 points to 16 points. On the other hand, the second parameter remains 25 points.

The seventh line of the charge/discharge history information indicates that at 11:01 on July 28, power storage device 10 was charged with a power amount of 1 kWh by regenerative braking of moving body 40 . The remaining capacity of power storage device 10 increases from 41 kWh to 42 kWh. The second parameter is increased from 16 points to 17 points because it is charging by regenerative braking. On the other hand, the first parameter remains 25 points.

The eighth line of the charge/discharge history information indicates that 5 kWh of power was sold from power storage device 10 to power device 20 at 12:00 on July 28th. The remaining capacity of power storage device 10 is reduced from 42 kWh to 37 kWh. Since the power is sold to the power device 20, the first parameter is reduced from 25 points to 20 points. On the other hand, the second parameter remains 17 points.

When power storage device 10 and power device 20 are communicably connected, control unit 15 controls power sales by power storage device 10 based on charge/discharge history information. Specifically, the control unit 15 may determine the upper limit power amount based on the first parameter included in the charge/discharge history information. For example, the control unit 15 may determine the upper limit power amount to be a value equal to or less than the first parameter. The control unit 15 permits power selling up to the upper limit power amount. Specifically, the control unit 15 may end power selling when the power selling amount reaches the upper limit power amount after the start of power selling. The control unit 15 may start selling power from the power storage device 10 to the power device 20 . When the power sale ends, the control unit 24 of the power device 20 gives the user a reward according to the amount of power sold.

6 is a sequence diagram showing the operation of the power storage device 10 and the power device 20 according to one embodiment of the present disclosure.

Step S<b>100 : The power storage device 10 stores charge/discharge history information regarding charging/discharging of the power storage device 10 .

Step S101: The power storage device 10 determines the upper limit power amount based on the first parameter of the charge/discharge history information.

Step S102: The power storage device 10 permits power selling up to the upper limit power amount.

Step S<b>103 : The power storage device 10 starts selling power to the power device 20 .

Step S<b>104 : After completing the power sale, the power device 20 gives the user a reward according to the amount of power sold.

As described above, in the electric power system 1 , the power storage device 10 controls power sales by the power storage device 10 based on the charge/discharge history information regarding the charge/discharge of the power storage device 10 . According to such a configuration, it is possible to sell power in consideration of the origin of the power accumulated in the power storage device 10 . Therefore, the convenience of the technology for selling electric power is improved.

For example, the charge/discharge history information may include a first parameter and a second parameter. The first parameter increases according to the amount of charging power from the first charging device 30a that supplies renewable energy-derived power. The second parameter increases according to the amount of charging power from the second charging device 30b that supplies power derived from exhaustible energy. The power storage device 10 may permit power selling up to an upper limit power amount determined based on the first parameter. Such a configuration may correspond to permitting the sale of only renewable energy-derived power among the power accumulated in the power storage device 10 . According to such a configuration, it is possible to motivate the user to charge power storage device 10 using power derived from renewable energy. Therefore, the use of electric power derived from renewable energy is promoted, and the occurrence of adverse effects on the environment is reduced. Therefore, the convenience of the technology for selling electric power is further improved.

Although the present disclosure has been described with reference to drawings and embodiments, it should be noted that various variations and modifications can be easily made by those skilled in the art based on the present disclosure. Therefore, it should be noted that these variations and modifications are included within the scope of this disclosure. For example, the functions included in each means or each step can be rearranged so as not to be logically inconsistent. A plurality of means or steps etc. may be combined together or divided.

For example, at least part of the operation of power storage device 10 in the above-described embodiments may be performed by power device 20 . For example, steps S100 to S102 described above may be performed by power device 20 communicably connected to power storage device 10 .

For example, the power device 20 in the embodiments described above may be divided into multiple devices communicatively connected to each other. Among the plurality of devices, for example, at least one device that performs the operation of giving the user a reward according to the amount of power sold may be arranged in the facility where the power device 20 is installed. According to such a configuration, the user can be motivated to enter the facility in order to receive the reward. Therefore, activation of the user's economic activities in the facility can be promoted.

In the above-described embodiment, as a method of controlling the power sale by the power storage device 10 based on the charge/discharge history information, power sale is permitted up to the upper limit power amount determined based on the first parameter included in the charge/discharge history information. described the configuration that The method of controlling power sales based on charge/discharge history information is not limited to the above-described embodiment. In another embodiment, for example, the control unit 15 of the power storage device 10 may allow the power storage device 10 to sell power when the second parameter included in the charge/discharge history information is 0 points. Control unit 15 may prohibit power storage device 10 from selling power to power storage device 10 when the second parameter included in the charge/discharge history information is not 0 points.
FIG. 7 is a sequence diagram showing operations of the power storage device 10 and the power device 20 according to another embodiment of the present disclosure.

Step S<b>200 : The power storage device 10 stores charge/discharge history information related to charging/discharging of the power storage device 10 .

Step S201: The power storage device 10 permits the power storage device 10 to sell power when the second parameter included in the charge/discharge history information is 0 points, and prohibits it when the second parameter is not 0 points. Here, it is assumed that power storage device 10 is permitted to sell power.

Step S<b>202 : The power storage device 10 starts selling power to the power device 20 .

Step S<b>203 : After completing the power sale, the power device 20 gives the user a reward according to the amount of power sold.

Steps S200 to S202 described above may be performed by power device 20 communicably connected to power storage device 10 .

In the embodiment described above, the configuration in which the first parameter increases according to the amount of power charged by the first charging device 30a that supplies power derived from renewable energy has been described. In another embodiment, only for a specific first charging device 30a, a configuration is possible in which the first parameter increases according to the amount of power charged by the first charging device 30a. The specific first charging device 30a may be, for example, the first charging device 30a associated with the user of the power storage device 10 . The first charging device 30a associated with the user may be, for example, the first charging device 30a owned or rented by the user. For example, first charging device 30a may store the correspondence relationship between the user and first charging device 30a according to the user's operation when owned or borrowed by the user. According to such a configuration, the user can be motivated to own or rent the first charging device 30a. Therefore, the use of electric power derived from renewable energy is promoted, and the occurrence of adverse effects on the environment is reduced. Therefore, the convenience of the technology for selling electric power is further improved.

In the above-described embodiment, a configuration will be described in which the amount of electric power discharged from the power storage device 10 to the mobile body 40 and the amount of power charged to the power storage device 10 by the regenerative braking of the mobile body 40 are separately stored in the charge/discharge history information. did. In another embodiment, the amount of power discharged from the power storage device 10 to the moving body 40 and the amount of power charged to the power storage device 10 by the regenerative braking of the moving body 40 may be collectively accumulated in the charge/discharge history information. In general, the amount of power discharged from power storage device 10 to moving body 40 is greater than the amount of power charged to power storage device 10 by regenerative braking of moving body 40 . Therefore, the remaining capacity of power storage device 10 at the end of movement of mobile body 40 is smaller than at the start of movement of mobile body 40 . Therefore, the total value of the first parameter and the second parameter may decrease as described above according to the amount of decrease in the state of charge of power storage device 10 before and after movement of moving body 40 .

In other embodiments, charging device 30 may be a single device that has the functionality of both first charging device 30a and second charging device 30b. Such charging device 30 can selectively use renewable energy-derived power or non-renewable energy-derived power, for example, by performing arbitrary processing such as internal switching and power measurement separately. can. The charging device 30 supplies power derived from renewable energy as the first charging device 30a, and supplies power derived from exhaustible energy as the second charging device 30b when the supply of power derived from renewable energy is stopped. can be done.

In other embodiments, charging device 30 may include a storage battery. For example, when charging the storage battery only with power derived from renewable energy, the charging device 30 may function as the first charging device 30a capable of supplying power derived from renewable energy accumulated in the storage battery. good.

In another embodiment, the charge/discharge history information regarding the charging/discharging of power storage device 10 may be stored in a device other than power storage device 10 . Other devices may include, for example, a computer provided at the home of the user of power storage device 10, a storage device mounted on mobile object 40, a server connected to a communication network, and the like. In such a case, the control unit 15 of the power storage device 10 transmits the charge/discharge history information to the other device via the communication unit 12, for example, each time the power storage device 10 is charged/discharged. The other device stores the charge/discharge history information received from power storage device 10 .

1 power system 10 power storage device 11 storage battery 12 communication unit 13 sensor unit 14 storage unit 15 control unit 20 power device 21 communication unit 22 sensor unit 23 storage unit 24 control unit 30 charging device 30a first charging device 30b second charging device 31 communication Unit 32 Sensor unit 33 Storage unit 34 Control unit 40 Moving object

Claims (10)

A power system comprising a power storage device and a power device that receives supply of power from the power storage device,
When the power storage device and the power device are connected, the power storage device or the power device supplies power received from the power storage device based on charge/discharge history information related to charging/discharging of the power storage device. controlled by
The charge/discharge history information includes a first parameter that increases according to the amount of power charged from the first charging device that satisfies a predetermined condition, and increases according to the amount of power that is charged from the second charging device that does not satisfy the predetermined condition. a second parameter, and
the power storage device or the power device prohibits the power device from accepting supply of power from the power storage device when the second parameter is not zero ;
The predetermined condition includes a condition that the charging device supplies power generated using renewable energy and is associated with the user of the power storage device,
The power system , wherein the first charging device stores a correspondence relationship between the user and the first charging device when owned or rented by the user . The power system of claim 1, wherein
The electric power system, wherein the power storage device or the power device permits the power device to accept power supply from the power storage device when the second parameter is zero. 3. The power system according to claim 1 or 2 ,
When the power storage device is discharged other than by supplying power to the power device, the total value of the first parameter and the second parameter is reduced by the amount of discharged power,
A power system wherein the second parameter is preferentially decreased when the second parameter is greater than zero. A power system according to any one of claims 1 to 3 ,
The power system according to claim 1, wherein, when supplying power to the power device, the power storage device reduces the first parameter by the amount of power supplied to the power device. A power system according to any one of claims 1 to 4 ,
The power storage device is mounted on a moving body that charges the power storage device by regenerative braking,
The electric power system, wherein the second parameter increases according to the amount of electric power charged by the regenerative braking of the moving body. A power system according to any one of claims 1 to 5 ,
The charge/discharge history information is transmitted from the power storage device to the power device when the power storage device and the power device are connected,
When the charge/discharge history information is transmitted from the power storage device to the power device, the power storage device or the power device determines whether or not to prohibit the power device from accepting supply of power from the power storage device. power system. A power system according to any one of claims 1 to 6 ,
The power device provides a user of the power storage device with a reward according to the amount of power supplied by the power storage device,
The power system, wherein the reward includes points available to a user at a facility where the power device is installed. A power storage device that supplies power to a power device,
a control unit that controls the supply of power received from the power storage device by the power device when connected to the power device based on charge/discharge history information related to charging/discharging of the power storage device;
The charge/discharge history information includes a first parameter that increases according to the amount of power charged from the first charging device that satisfies a predetermined condition, and increases according to the amount of power that is charged from the second charging device that does not satisfy the predetermined condition. a second parameter, and
the power storage device or the power device prohibits the power device from accepting supply of power from the power storage device when the second parameter is not zero ;
The predetermined condition includes a condition that the charging device supplies power generated using renewable energy and is associated with the user of the power storage device,
The first charging device is a power storage device that stores a correspondence relationship between the user and the first charging device when owned or rented by the user . A control method for a power system comprising a power storage device and a power device that receives supply of power from the power storage device,
When the power storage device or the power device is connected to the power storage device, the power device receives power supply from the power storage device based on charge/discharge history information related to charging/discharging of the power storage device. wherein the charge/discharge history information includes a first parameter that increases according to the amount of charging power from the first charging device that satisfies a predetermined condition, and a a second parameter that increases according to the amount of charging power;
a step in which the power storage device or the power device prohibits the power device from accepting power supply from the power storage device when the second parameter is not zero ;
The predetermined condition includes a condition that the charging device supplies power generated using renewable energy and is associated with the user of the power storage device,
The method of controlling a power system, further comprising storing a correspondence relationship between the user and the first charging device when the first charging device is owned or rented by the user . A mobile body equipped with a power storage device that supplies power to a power device,
When the power storage device and the power device are connected, the power storage device or the power device supplies power received from the power storage device based on charge/discharge history information related to charging/discharging of the power storage device. controlled by
The charge/discharge history information includes a first parameter that increases according to the amount of power charged from the first charging device that satisfies a predetermined condition, and increases according to the amount of power that is charged from the second charging device that does not satisfy the predetermined condition. a second parameter, and
the power storage device or the power device prohibits the power device from accepting supply of power from the power storage device when the second parameter is not zero ;
The predetermined condition includes a condition that the charging device supplies power generated using renewable energy and is associated with the user of the power storage device,
A moving object , wherein the first charging device stores a correspondence relationship between the user and the first charging device when owned or rented by the user .

Images