Power storage device management device, power storage device management system, power storage device management method, and program

Abstract

To provide a power storage device management device capable of appropriately managing a power storage amount of a power storage device, a power storage device management system, a power storage device management method, and a program.SOLUTION: A cloud servers 1 includes: a control information notification unit 114 that generates control information based on an operation mode of a PCS 51 specified by a user and a specified charge / discharge amount of a power storage device specified by the user and transmits it to the PCS 51; a charge / discharge amount calculation unit 116 that calculates a differential charge / discharge amount corresponding to a differential between a first cumulative charge / discharge amount at operation start time when the PCS 51 starts operation based on the control information and a second cumulative charge / discharge amount at a switching time point when the operation mode is switched when the operation mode of the PCS 51 is switched after the PCS 51 starts the operation based on the control information; and a charge / discharge success / failure determination unit 117 that determines whether or not the charge / discharge of the power storage device specified by the user is successful depending on whether or not the differential charge / discharge amount is less than the specified charge / discharge amount.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a power storage device management device, a power storage device management system, a power storage device management method, and a program. [Background technology]

[0002] A power management system has been proposed that includes a power conversion device having a power conversion unit connected to a storage battery and a control unit that controls the amount of charge or discharge of the storage battery, and a power management device that sends instructions to the power conversion device (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-205746 Summary of the Invention [Problem to be solved by the invention]

[0004] In the power management system described in Patent Document 1, there are cases where a power conversion device is controlled so as to charge a storage battery by a specified charge amount or discharge a specified discharge amount. In this case, when control of the power conversion device is completed, it is required to be able to appropriately manage the amount of electricity stored in the storage battery by determining whether charging or discharging has been completed as specified.

[0005] The present disclosure has been made in consideration of the above-mentioned reasons, and aims to provide a storage device management device, a storage device management system, a storage device management method, and a program that can appropriately manage the amount of electricity stored in a storage device. [Means for solving the problem]

[0006] In order to achieve the above object, the power storage device management device according to the present disclosure includes: a power storage device management device that switches an operation mode between a charge mode for charging a power storage device and a discharge mode for discharging the power storage device based on first control information for charging or discharging the power storage device, and manages the amount of power stored in the power storage device by controlling a power conversion device whose operation mode is switched according to a power usage situation in a power consumption area where the power storage device is installed, a control information notification unit that generates the first control information based on the operation mode of the power electronics device designated by a user and a designated charge / discharge amount of the power storage device designated by the user, and transmits the first control information to the power electronics device; a charge / discharge amount calculation unit that, when the operation mode is switched from either the charge mode or the discharge mode to the other after the power conversion device has started operation based on the first control information, calculates a difference in charge / discharge amount corresponding to a difference between a first accumulated charge / discharge amount from a preset reference time point at the start of operation when the power conversion device has started operation based on the first control information and a second accumulated charge / discharge amount from the reference time point at a switching time point when the operation mode is switched; and a charge / discharge success / failure determination unit that determines whether charging / discharging of the power storage device designated by the user has been successful, depending on whether the difference in charge / discharge amount is less than the designated charge / discharge amount. [Effects of the Invention]

[0007] According to the present disclosure, when the power conversion device starts operating based on the control information and then switches the operating mode, the charge / discharge amount calculation unit calculates a differential charge / discharge amount corresponding to the difference between the first cumulative charge / discharge amount from the reference point at the start of the operation and the second cumulative charge / discharge amount from the reference point at the switching point. Then, the charge / discharge success / failure determination unit determines whether the charging / discharging of the power storage device specified by the user was successful based on whether the calculated differential charge / discharge amount is less than the specified charge / discharge amount. This allows the user to determine whether the charging / discharging of the power storage device specified by the user was successful when the operating mode of the power conversion device is switched after specifying the charge / discharge amount and starting charging / discharging of the power storage device. This allows the user to appropriately manage the amount of stored power in the power storage device. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic configuration diagram of a power storage device management system according to a first embodiment of the present disclosure; [Figure 2] FIG. 1 is a block diagram showing a hardware configuration of a power storage device management system according to a first embodiment. [Figure 3] FIG. 1 is a block diagram showing a functional configuration of a power storage device management system according to a first embodiment. [Figure 4] 1A is a diagram showing an example of information stored in an electric energy storage unit according to the first embodiment, and FIG. 1B is a diagram showing an example of information stored in a charge / discharge amount storage unit according to the first embodiment. [Figure 5] FIG. 1 is a sequence diagram illustrating an example of an operation of the power storage device management system according to the first embodiment. [Figure 6] FIG. 1 is a sequence diagram illustrating an example of an operation of the power storage device management system according to the first embodiment. [Figure 7] FIG. 10 is a diagram showing an example of a status notification image displayed on a display unit of a terminal device according to the first embodiment; [Figure 8] FIG. 1 is a sequence diagram illustrating an example of an operation of the power storage device management system according to the first embodiment. [Figure 9] 1 is a flowchart showing an example of the flow of a charge / discharge amount measurement process executed by the power amount measurement device according to the first embodiment; [Figure 10] 10 is a flowchart showing an example of the flow of a power storage device management process executed by a cloud server according to the first embodiment. [Figure 11] FIG. 10 is a block diagram showing a functional configuration of a power storage device management system according to a second embodiment. [Figure 12] 10 is a flowchart showing an example of the flow of a power storage device management process executed by a cloud server according to a second embodiment. [Figure 13] 10 is a schematic configuration diagram of a power storage device management system according to a third embodiment of the present disclosure. [Figure 14] FIG. 10 is a block diagram showing a functional configuration of a power storage device management system according to a third embodiment. [Figure 15]10 is a flowchart showing an example of the flow of a power storage device management process executed by a cloud server according to a third embodiment. [Figure 16] 10 is a flowchart showing an example of the flow of a power storage device management process executed by a cloud server according to a third embodiment. [Figure 17] FIG. 10 is a diagram showing an example of a status notification image displayed on a display unit of a terminal device according to a third embodiment; DETAILED DESCRIPTION OF THE INVENTION

[0009] (Embodiment 1) A power storage device management system according to the present embodiment will be described below with reference to the drawings. The power storage device management system according to the present embodiment includes a power conversion device whose operation mode is switched between a charge mode for charging the power storage device and a discharge mode for discharging the power storage device based on control information for charging or discharging the power storage device, and whose operation mode is switched according to the power usage status of the power consumption area where the power storage device is installed, and a power storage device management device that manages the amount of stored power in the power storage device by controlling the power conversion device. The power storage device management device includes a control information notification unit that generates control information and transmits it to the power conversion device based on the operation mode of the power conversion device specified by a user and the specified charge / discharge amount of the power storage device specified by the user, a charge / discharge amount calculation unit, and a charge / discharge success / failure determination unit. When the operation mode is switched from one of the charge mode and the discharge mode to the other after the power conversion device starts operation based on the control information, the charge / discharge amount calculation unit calculates a differential charge / discharge amount corresponding to the difference between a first accumulated charge / discharge amount from a preset reference point at the start of operation when the power conversion device starts operation based on the control information and a second accumulated charge / discharge amount from the reference point at the switching point at which the operation mode is switched. The charge / discharge success / failure determination unit determines whether the charging / discharging of the power storage device specified by the user has been successful depending on whether the differential charge / discharge amount is less than the specified charge / discharge amount.

[0010] The power storage device management system according to this embodiment manages the charge / discharge amount of a power storage device 52 in a building H, which is an electricity consumption area in which the power storage device 52 is installed, as shown in FIG. 1 . The building H is also equipped with a distribution board 61 that branches and supplies power supplied from a power conditioner (hereinafter referred to as “PCS”) 51 or a power grid PS to each electrical device 4, and a power metering device 62 that measures the amount of power supplied to the PCS 51 and the electrical device 4. The building H is also equipped with a broadband router (hereinafter referred to as “BBR”) 7 that can communicate with the power metering device 62 and the PCS 51 via a local network NW2 established within the building H. The BBR 7 is connected to a wide area network NW1 such as the Internet. The local network NW2 is a wireless local area network (LAN) or a wired LAN. The power storage device management system according to this embodiment includes the PCS 51, a cloud server 1, and a terminal device 3. The terminal device 3 and the cloud server 1 are capable of communicating with each other via a wide area network NW1. The electrical appliances 4 are, for example, air conditioners, lighting fixtures, floor heating systems, refrigerators, induction heating (IH) cookers, televisions, etc. The electrical appliances 4 are installed in each residence and receive power from a distribution board 61.

[0011] The PCS 51 is a power conversion device whose operation mode is switched depending on the power usage status of the building H. Here, the operation mode of the PCS 51 may be switched autonomously based on the direction and magnitude of power flow detected by a power flow detection unit 513, or may be switched manually by a user. The PCS 51 includes a bidirectional DC / DC converter 5111 and a bidirectional DC / AC converter 5112 interposed between the power storage device 52 and the distribution board 61, and a converter control unit 512 that controls the operation of the bidirectional DC / DC converter 5111 and the bidirectional DC / AC converter 5112. The PCS 51 also includes a power flow detection unit 513 that detects the direction and magnitude of power flow between the PCS 51 and the distribution board 61 using a power flow detection current transformer CT511 interposed between the PCS 51 and the distribution board 61. Converter control unit 512 controls the operations of bidirectional DC / DC converter 5111 and bidirectional DC / AC converter 5112 based on the direction and magnitude of the tidal current measured by tidal current detection unit 513. PCS 51 switches its operation mode between a charge mode for charging power storage device 52 and a discharge mode for discharging power storage device 52, based on control information for charging or discharging power storage device 52 transmitted from cloud server 1. When operating in the charge mode, PCS 51 outputs power input from distribution board 61 to power storage device 52, and when operating in the discharge mode, PCS 51 outputs power output from power storage device 52 to distribution board 61. Furthermore, when starting operation in the charge mode or the discharge mode, based on the control information transmitted from cloud server 1, PCS 51 generates operation notification information including operation mode information indicating the operation mode at the start of operation, operation status information indicating that the PCS is operating, and power storage device identification information for identifying power storage device 52 connected to PCS 51, and transmits the operation notification information to cloud server 1. Furthermore, the PCS 51 autonomously switches the operation mode according to the direction and magnitude of the current measured by the current detection unit 513. Here, when the PCS 51 switches the operation mode after starting operation in either the charge mode or the discharge mode, the PCS 51 generates operation switch notification information that includes the power storage device identification information of the power storage device 52 connected to the PCS 51 and notifies the cloud server 1 that the operation mode has been switched, and transmits the operation switch notification information to the cloud server 1.

[0012] The power meter 62 is a so-called smart meter that periodically measures the amount of power supplied from the distribution board 61 to the PCS 51 and each electrical device 4 at each power measurement interval, which occurs at a predetermined cycle, using a current transformer CT 621 inserted between the distribution board 61 and the PCS 51 and current transformers CT 622 inserted in branch lines from the distribution board 61 to each electrical device 4. The power meter 62 measures the amount of power supplied from the distribution board 61 to the PCS 51 and each electrical device 4 between adjacent power measurement intervals. The power measurement intervals can be set to occur at intervals of, for example, several minutes to several tens of minutes. The power meter 62 includes a power information generation unit 621 that generates power information indicating the amount of power supplied to the PCS 51 and each electrical device 4 based on the current values ​​measured by the current transformers CT 621 and CT 622, and a timer unit 622 that measures the date and time corresponding to the power measurement interval. The power metering device 62 also includes a power amount storage unit 623 that stores power amount information indicating the amount of power supplied to the PCS 51 and the electrical appliance 4, in association with date and time information indicating the time when the power amount was measured and device identification information of the power supply destination, and a power amount notification unit 624. The power amount information generation unit 621 stores the power amount information generated based on the current values ​​measured by the current transformers CT 621 and CT 622 in association with date and time information indicating the time when the power amount was measured, measured by the timer unit 622, and device identification information identifying the PCS 51 and the electrical appliance 4. Here, the power amount indicated by the power amount information is set to, for example, a positive value when power is supplied from the distribution board 61 to the PCS 51, i.e., when the power storage device 52 is charged, and a negative value when power is supplied from the PCS 51 to the distribution board 61, i.e., when the power storage device 52 is discharged.

[0013] When the power amount notification unit 624 receives, from the cloud server 1, power amount information request information requesting the cloud server 1 to transmit power amount information, the power amount notification unit 624 references the power amount information stored in the power amount information storage unit and associated with the device identification information of the PCS 51 to calculate the cumulative charge / discharge amount from a predetermined reference point at the time the power amount information request information was received. The power amount notification unit 624 calculates the sum of the power amounts indicated by the power amount information, taking into account whether the amount is positive or negative from the reference point. The reference point can be set, for example, to a point several hours or several days before the time the power amount information request information was received, or to a point corresponding to an integer multiple of the cycle at which the power amount measurement period arrives. Alternatively, the reference point can be set to a predetermined time of each day or a predetermined date and time of each month. The power amount notification unit 624 then generates and transmits power amount notification information to the cloud server 1. The power amount notification information includes cumulative charge / discharge amount information indicating the calculated cumulative charge / discharge amount and stored power amount identification information identifying the power storage device 52 connected to the PCS 51.

[0014] The terminal device 3 is, for example, a smartphone, and includes, as shown in FIG. 2, a CPU (Central Processing Unit) 301, a main memory 302, an auxiliary memory 303, a display 304, an input unit 305, and a communication unit 306. The main memory 302 is a volatile memory used as a work area for the CPU 301, and the auxiliary memory 303 is a non-volatile memory such as a semiconductor flash memory, and stores programs for implementing various functions of the terminal device 3. The display 304 is a liquid crystal display, an organic EL (Electro-Luminescence) display, or the like, and displays various information. The input unit 305 is, for example, a touchpad placed on the display 304, and receives various operation information in response to user operations and outputs the received operation information to the CPU 301. The communication unit 306 has an interface for connecting to the wide area network NW1.

[0015] The CPU 301 reads out the program stored in the auxiliary storage unit 303 into the main storage unit 302 and executes it, thereby functioning as a charge / discharge command notification unit 311, an operation status acquisition unit 312, a display control unit 313, and a determination result acquisition unit 314, as shown in Fig. 3. The auxiliary storage unit 303 shown in Fig. 2 also has a designated charge / discharge amount storage unit 331, an operation status storage unit 332, and a designated charge / discharge success / failure storage unit 333, as shown in Fig. 3. The designated charge / discharge amount storage unit 331 stores charge / discharge amount information indicating the amount of charge / discharge of the power storage device 52 by the PCS 51 designated by the user and operation mode information indicating the operation mode of the PCS 51 designated by the user, in association with power storage device identification information that identifies the power storage device 52 connected to the PCS 51.

[0016] The operation status storage unit 332 stores operation status information indicating the operation status of the PCS 51 in association with power storage device identification information that identifies the power storage device 52 connected to the PCS 51. The specified charge / discharge success / failure storage unit 333 stores specified charge / discharge success / failure information that indicates whether charging or discharging of the power storage device 52 specified by the user in the PCS 51 was successful or not in association with the power storage device identification information that identifies the power storage device 52.

[0017] When the user performs a charge / discharge command operation to input the charge / discharge amount and the operation mode of the PCS 51 to the input unit 305, the charge / discharge command notification unit 311 stores charge / discharge amount information indicating the charge / discharge amount specified by the user and operation mode information indicating the operation mode of the PCS 51 specified by the user in association with the storage device identification information of the power storage device 52 connected to the PCS 51. Then, the charge / discharge command notification unit 311 generates charge / discharge command information including the above-mentioned charge / discharge amount information and operation mode information and the storage device identification information of the power storage device 52 corresponding to the charge / discharge amount information and operation mode information, and transmits the charge / discharge command information to the cloud server 1.

[0018] When the operation status acquisition unit 312 acquires operation status notification information including operation status information of the PCS 51 transmitted from the cloud server 1, it extracts the operation status information and the power storage device identification information included in the acquired operation status notification information, associates the extracted information with each other, and stores the associated information in the operation status storage unit 332. When the determination result acquisition unit 314 acquires the determination result notification information transmitted from the cloud server 1, it extracts the designated charge / discharge success / failure information and the power storage device identification information included in the acquired determination result notification information, and associates the extracted information with each other and stores the associated information in the designated charge / discharge success / failure storage unit 333.

[0019] The display control unit 313 forms a status notification image for notifying the user of the status of the PCS 51 based on the charge / discharge amount specified by the user, charge / discharge amount information indicating the operation mode of the PCS 51, and operation mode information stored in the specified charge / discharge amount storage unit 331, the operation status information stored in the operation status storage unit 332, and the commanded charge / discharge success / failure information stored in the specified charge / discharge success / failure storage unit 333, and causes the display unit 304 to display the image. Here, when the operation status indicated by the operation status information stored in the operation status storage unit 332 for each PCS 51 indicates "operating," the display control unit 313 selects "commanding" as the message indicating the status of the PCS 51. Furthermore, when the operation status indicated by the operation status information stored in the operation status storage unit 332 for each PCS 51 indicates "stopped" and there is no operation history based on control information from the cloud server 1 within the immediately preceding preset operation history determination period, the display control unit 313 selects "standby" as the message indicating the status of the PCS 51. This operation history determination period is set, for example, to about several hours to one day. Furthermore, for each PCS 51, if the operation status indicated by the operation status information stored in the operation status storage unit 332 indicates “stopped” and the designated charge / discharge success / failure information stored in the designated charge / discharge success / failure storage unit 333 corresponding to the PCS 51 that operated based on control information from the cloud server 1 during the most recent operation history determination period indicates “success,” the display control unit 313 selects “completed” as the message indicating the status of the PCS 51. Furthermore, for each PCS 51, if the operation status indicated by the operation status information stored in the operation status storage unit 332 indicates “stopped” and the designated charge / discharge success / failure information stored in the designated charge / discharge success / failure storage unit 333 corresponding to the PCS 51 that operated based on control information from the cloud server 1 during the most recent operation history determination period indicates “failed,” the display control unit 313 selects “cancelled” as the message indicating the status of the PCS 51. Then, the display control unit 313 forms a status notification image including a message image representing the selected message.

[0020] Returning to FIG. 2 , the cloud server 1 is, for example, a computer used as a server, and includes a processing unit 101, a main memory unit 102, an auxiliary memory unit 103, a communication unit 106, and a bus 109 connecting the various units. The cloud server 1 functions as a power storage device management device that manages the amount of power stored in the power storage device 52. The processing unit 101 is, for example, a multi-core processor. The main memory unit 102 is a volatile memory and is used as a work area for the processing unit 101. The auxiliary memory unit 103 has non-volatile memory, functions as a ROM (Read Only Memory) and storage, and stores programs for implementing various functions of the cloud server 1. The communication unit 106 communicates with the PCS 51 and the power metering device 62 via the wide area network NW1 and BBR 7, and with the terminal device 3 via the wide area network NW1.

[0021] The processing unit 101 reads out the program stored in the auxiliary storage unit 103 into the main storage unit 102 and executes it, thereby functioning as an electric energy information acquisition unit 111, an operation information acquisition unit 112, a charge / discharge command acquisition unit 113, a control information notification unit 114, an operation state notification unit 115, a charge / discharge amount calculation unit 116, a charge / discharge success / failure determination unit 117, and a determination result notification unit 118, as shown in Fig. 3. Furthermore, the auxiliary storage unit 103 shown in Fig. 2 has an electric energy storage unit 131, an operation state storage unit 132, a charge / discharge amount storage unit 133, and a specified charge / discharge amount storage unit 134, as shown in Fig. 3. The power amount memory unit 131 stores, in association with the power storage device identification information, first cumulative charge / discharge amount information indicating the cumulative charge / discharge amount at the time when the PCS51 starts operation based on the control information transmitted from the cloud server 1, and second cumulative charge / discharge amount information indicating the cumulative charge / discharge amount at the time when the operation mode of the PCS51 is switched, as shown in FIG. 4(A), for example.

[0022] Returning to FIG. 3 , the operation status storage unit 132 stores operation mode information indicating the operation mode of the PCS 51 and operation status information indicating the operation status of the PCS 51 in association with the power storage device identification information of the power storage device 52 connected to the PCS 51. Here, the operation status includes a state in which the PCS 51 is operating in a charge mode or a discharge mode, and a stopped state. For example, as shown in FIG. 4B , the charge / discharge amount storage unit 133 stores differential charge / discharge amount information indicating a differential charge / discharge amount corresponding to the difference between the first cumulative charge / discharge amount and the second cumulative charge / discharge amount in association with the power storage device identification information. Here, the differential charge / discharge amount indicates a positive value when the PCS 51 operates in the charge mode and a negative value when the PCS 51 operates in the discharge mode. In the example shown in FIG. 4B , the PCS 51 connected to the power storage device 52 identified by the power storage device identification information IDB[0] operates in the charge mode, thereby charging 1000 kWh to the power storage device 52. On the other hand, the PCS 51 connected to the storage device 52 identified by the storage device identification information IDB[i] (i is a positive integer) indicates that it has discharged 1000 kWh of power into the storage device 52 by operating in a discharge mode.

[0023] Returning to Figure 3, the specified charge / discharge amount memory unit 134 stores charge / discharge amount information indicating the charge / discharge amount of the storage device 52 by the PCS 51 specified by the user, and operation mode information indicating the operation mode of the PCS 51 specified by the user, in association with storage device identification information that identifies the storage device 52 connected to the PCS 51 owned by the user.

[0024] When the charge / discharge command acquisition unit 113 acquires the above-mentioned charge / discharge command information transmitted from the terminal device 3, it extracts, from the acquired charge / discharge command information, charge / discharge amount information indicating the charge / discharge amount specified by the user, operation mode information indicating the operation mode of the PCS 51 specified by the user, and power storage device identification information. Then, the charge / discharge command acquisition unit 113 stores the extracted charge / discharge amount information and power storage device identification information in association with each other in the designated charge / discharge amount storage unit 134. Furthermore, the charge / discharge command acquisition unit 113 notifies the control information notification unit 114 of the extracted charge / discharge amount information, operation mode information, and power storage device identification information. Furthermore, when the charge / discharge command acquisition unit 113 acquires stop command information for stopping the operation of the PCS 51 transmitted from the terminal device 3, it notifies the control information notification unit 114 of the acquired stop command information.

[0025] When the control information notification unit 114 is notified of the charge / discharge amount information, operation mode information, and power storage device identification information from the charge / discharge command acquisition unit 113, the control information notification unit 114 generates control information for operating the PCS 51 in a charge mode or a discharge mode based on the notified information, and transmits the generated control information to the PCS 51. At this time, the control information notification unit 114 notifies the power amount information acquisition unit 111 of operation start notification information notifying that the operation of the PCS 51 is to start, and the power storage device identification information. Furthermore, when the control information notification unit 114 is notified of stop command information from the charge / discharge command acquisition unit 113, it generates control information for stopping the operation of the PCS 51, and transmits the generated control information to the PCS 51.

[0026] When operation information acquisition unit 112 acquires operation notification information transmitted from PCS 51, it extracts operation mode information, operation status information, and power storage device identification information included in the acquired operation notification information, and stores the extracted information in association with each other in operation status storage unit 132. Furthermore, when operation information acquisition unit 112 acquires operation switching notification information transmitted from PCS 51, it extracts operation mode information indicating the post-switching operation mode, operation status information, and power storage device identification information included in the acquired operation switching notification information, and stores the extracted information in association with each other in operation status storage unit 132. At this time, operation information acquisition unit 112 notifies power amount information acquisition unit 111 of the operation switching notification information and the power storage device identification information.

[0027] When the power amount information acquiring unit 111 is notified of the operation start notification information and the power storage device identification information by the control information notifying unit 114, the power amount information acquiring unit 111 generates the above-mentioned power amount information request information including the notified power storage device identification information and transmits the generated power amount information to the power amount measuring device 62. As a result, the power amount information acquiring unit 111 acquires power amount notification information including first accumulated charge / discharge amount information indicating a first accumulated charge / discharge amount to the PCS 51 connected to the power storage device 52 identified by the power storage device identification information. The power amount information acquiring unit 111 then extracts the accumulated charge / discharge amount information and the power storage device identification information included in the acquired power amount notification information, and stores the extracted accumulated charge / discharge amount information in the power amount storage unit 131 in association with the extracted power storage device identification information as the first accumulated charge / discharge amount information. Furthermore, when the power amount information acquiring unit 111 is notified of the operation switch notification information and the power storage device identification information by the operation information acquiring unit 112, the power amount information acquiring unit 111 generates the above-mentioned power amount information request information including the notified power storage device identification information and transmits the generated power amount information to the power amount measuring device 62. As a result, the power amount information acquisition unit 111 acquires power amount notification information including cumulative charge / discharge amount information indicating the cumulative charge / discharge amount of the PCS 51 connected to the power storage device 52 identified by the power storage device identification information. Then, the power amount information acquisition unit 111 extracts the cumulative charge / discharge amount information and the power storage device identification information included in the acquired power amount notification information, and stores the extracted cumulative charge / discharge amount information in the power amount storage unit 131 in association with the extracted power storage device identification information as second cumulative charge / discharge amount information.

[0028] The operation state notification unit 115 generates operation state notification information including the operation mode information, operation state information, and power storage device identification information stored in the operation state storage unit 132, and transmits the generated operation state notification information to the terminal device 3.

[0029] The charge / discharge amount calculation unit 116 calculates a differential charge / discharge amount corresponding to the difference between the first cumulative charge / discharge amount from the reference time point at which the PCS 51 starts operation based on the control information and the second cumulative charge / discharge amount from the reference time point at which the operation mode of the PCS 51 is switched. The charge / discharge amount calculation unit 116 refers to the operation mode information stored in the operation status storage unit 132 and determines that the operation mode has switched from one of the charge mode and the discharge mode to the other after the PCS 51 starts operation based on the control information transmitted from the cloud server 1. In this case, the charge / discharge amount calculation unit 116 calculates a differential charge / discharge amount obtained by subtracting the first cumulative charge / discharge amount indicated by the first cumulative charge / discharge amount information from the second cumulative charge / discharge amount indicated by the second cumulative charge / discharge amount information stored in the power amount storage unit 131. The charge / discharge amount calculation unit 116 then stores the calculated differential charge / discharge amount information in the charge / discharge amount storage unit 133 in association with the power storage device identification information.

[0030] The charge / discharge success / failure determination unit 117 determines whether charging / discharging of the power storage device 52 designated by the user has been successful, depending on whether the aforementioned difference in charge / discharge amount is less than the designated charge / discharge amount stored in the designated charge / discharge amount storage unit 134. When new difference in charge / discharge amount information is stored in the charge / discharge amount storage unit 133, the charge / discharge success / failure determination unit 117 identifies power storage device identification information corresponding to the difference in charge / discharge amount information. Furthermore, the charge / discharge success / failure determination unit 117 identifies designated charge / discharge amount information stored in the designated charge / discharge amount storage unit 134 that corresponds to the identified power storage device identification information. Then, the charge / discharge success / failure determination unit 117 determines whether the absolute value of the difference in charge / discharge amount indicated by the difference in charge / discharge amount information newly stored in the charge / discharge amount storage unit 133 is less than the designated charge / discharge amount indicated by the identified designated charge / discharge amount information, and if the absolute value of the difference in charge / discharge amount is equal to or greater than the designated charge / discharge amount, determines that charging / discharging of the power storage device 52 designated by the user has been successful. On the other hand, if the absolute value of the charge / discharge amount difference is less than the designated charge / discharge amount, the charge / discharge success / failure determination unit 117 determines that the charging / discharging of the power storage device 52 designated by the user has failed. The charge / discharge success / failure determination unit 117 notifies the determination result notification unit 118 of designated charge / discharge success / failure information indicating the determination result. When the determination result notification unit 118 is notified of the designated charge / discharge success / failure information, it generates determination result notification information including the notified designated charge / discharge success / failure information and transmits it to the terminal device 3.

[0031] Next, the operation of the power storage device management system according to this embodiment will be described with reference to Figs. 5 to 7. First, as shown in Fig. 5, it is assumed that a user performs the above-mentioned charge / discharge command operation on the input unit 305 of the terminal device 3. In this case, the terminal device 3 generates charge / discharge command information including charge / discharge amount information indicating the charge / discharge amount specified by the user and operation mode information indicating the operation mode of the PCS 51 specified by the user (step S1). At this time, the terminal device 3 stores the charge / discharge amount information and the operation mode information in association with the power storage device identification information of the power storage device 52 connected to the PCS 51. Next, the generated charge / discharge command information is transmitted from the terminal device 3 to the cloud server 1 (step S2).

[0032] On the other hand, when the cloud server 1 acquires the charge / discharge command information, it extracts the charge / discharge amount information, operation mode information, and power storage device identification information included in the acquired charge / discharge command information, and stores the extracted information in the specified charge / discharge amount storage unit 134 in association with each other (step S3). Next, the cloud server 1 generates control information for operating the PCS 51 in the charge mode or the discharge mode based on the extracted charge / discharge amount information, operation mode information, and power storage device identification information (step S4). Thereafter, the generated control information is transmitted from the cloud server 1 to the PCS 51 (step S5).

[0033] Meanwhile, the PCS 51 starts operation in the charge mode or the discharge mode based on the control information transmitted from the cloud server 1 (step S6). At this time, the PCS 51 generates operation notification information including operation mode information indicating the operation mode at the start of operation, operation status information indicating that the PCS 51 is operating, and power storage device identification information identifying the power storage device 52 connected to the PCS 51 (step S7), and the generated operation notification information is transmitted from the PCS 51 to the cloud server 1 (step S8). Meanwhile, upon receiving the operation notification information transmitted from the PCS 51, the cloud server 1 extracts the operation mode information, operation status information, and power storage device identification information included in the received operation notification information, and stores the extracted information in the operation status storage unit 132 in association with each other (step S9).

[0034] Furthermore, after transmitting the above-mentioned control information to the PCS 51, the cloud server 1 generates power energy information request information including identification information of the power storage device connected to the PCS 51 that is the destination of the control information (step S10), and the generated power energy information request information is transmitted from the cloud server 1 to the power energy metering device 62 (step S11). Meanwhile, upon receiving the power energy information request information from the cloud server 1, the power energy metering device 22, in response to the power energy information request information, refers to the power energy information stored in the power energy information storage unit and calculates the cumulative charge / discharge amount to / from the PCS 51 since the reference point in time at which the power energy information request information was received. The power energy metering device 22 then generates power energy notification information including cumulative charge / discharge amount information indicating the calculated cumulative charge / discharge amount and stored energy identification information that identifies the power storage device 52 connected to the PCS 51 (step S12), and the generated power energy notification information is transmitted from the power energy metering device 22 to the cloud server 1 (step S13).

[0035] On the other hand, when the cloud server 1 acquires the power amount notification information transmitted from the power amount measuring device 22, it extracts the accumulated charge / discharge amount information and the power storage device identification information included in the acquired power amount notification information, and stores the extracted accumulated charge / discharge amount information in the power amount storage unit 131 in association with the extracted power storage device identification information as first accumulated charge / discharge amount information (step S14). Next, the cloud server 1 generates operation state notification information including operation mode information, operation state information, and power storage device identification information to be stored in the operation state storage unit 132 (step S15), and the generated operation state notification information is transmitted from the cloud server 1 to the terminal device 3 (step S16). On the other hand, when the terminal device 3 acquires the operation state notification information transmitted from the cloud server 1, it extracts the operation state information and the power storage device identification information included in the acquired operation state notification information, and stores the extracted information in the operation state storage unit 332 in association with each other (step S17). Next, as shown in FIG. 6, the terminal device 3 forms a status notification image to notify the user of the status of the PCS51 based on the charge / discharge amount specified by the user, charge / discharge amount information indicating the operation mode of the PCS51, and operation mode information stored in the specified charge / discharge amount memory unit 331, the operation status information stored in the operation status memory unit 332, and the command charge / discharge success / failure information stored in the specified charge / discharge success / failure memory unit 333, and displays the image on the display unit 304 (step S18).

[0036] 7, for example, and displays it on the display unit 304. This status notification image GA1 includes a message image M11 indicating the power storage device identification information, an input field image B11 for specifying the specified charge / discharge amount, an input field image B12 for specifying the operation mode, a message image M12 indicating the operation state of the PCS 51, and a button image BU1 selected when starting or stopping the operation of the PCS 51.

[0037] 6, assume again that an operation mode switching event occurs in the PCS 51, causing the PCS 51 to switch the operation mode. In this case, the PCS 51 generates operation switching notification information that includes power storage device identification information of the power storage device 52 connected to the PCS 51 and notifies the cloud server 1 that the operation mode has been switched (step S19), and the generated operation switching notification information is transmitted from the PCS 51 to the cloud server 1 (step S20). Meanwhile, upon receiving the operation switching notification information transmitted from the PCS 51, the cloud server 1 extracts operation mode information, operation status information, and power storage device identification information that indicate the post-switching operation mode, which are included in the received operation switching notification information, and stores the extracted information in association with each other in the operation status storage unit 132 (step S21).

[0038] Thereafter, the cloud server 1 generates power energy information request information including the power storage device identification information of the power storage device 52 connected to the PCS 51 that transmitted the operation switching notification information (step S22), and the generated power energy information request information is transmitted from the cloud server 1 to the power energy metering device 62 (step S23). Meanwhile, upon receiving the power energy information request information from the cloud server 1, the power energy metering device 22, in response to the power energy information request information, refers to the power energy information stored in the power energy information storage unit and calculates the cumulative charge / discharge amount to the PCS 51 since the reference point in time at which the power energy information request information was received. Then, the power energy metering device 22 generates power energy notification information including cumulative charge / discharge amount information indicating the calculated cumulative charge / discharge amount and stored power amount identification information that identifies the power storage device 52 connected to the PCS 51 (step S24), and the generated power energy notification information is transmitted from the power energy metering device 62 to the cloud server 1 (step S25).

[0039] On the other hand, when the cloud server 1 acquires the power amount notification information, it extracts the accumulated charge / discharge amount information and the power storage device identification information included in the acquired power amount notification information, and stores the extracted accumulated charge / discharge amount information in the power amount storage unit 131 in association with the extracted power storage device identification information as second accumulated charge / discharge amount information (step S26). Next, the cloud server 1 generates operation state notification information including operation mode information indicating the post-switch operation mode, operation state information, and power storage device identification information to be stored in the operation state storage unit 132 (step S27), and the generated operation state notification information is transmitted from the cloud server 1 to the terminal device 3 (step S28). On the other hand, when the terminal device 3 acquires the operation state notification information transmitted from the cloud server 1, it extracts the operation state information and the power storage device identification information included in the acquired operation state notification information, and stores the extracted information in the operation state storage unit 332 in association with each other (step S29).

[0040] Next, the cloud server 1 calculates a difference in charge / discharge amount corresponding to the difference between the first accumulated charge / discharge amount indicated by the first accumulated charge / discharge amount information stored in the power amount storage unit 131 and the second accumulated charge / discharge amount indicated by the second accumulated charge / discharge amount information (step S30). Here, the cloud server 1 stores the difference in charge / discharge amount information indicating the calculated difference in charge / discharge amount in the charge / discharge amount storage unit 133 in association with the power storage device identification information.

[0041] Thereafter, the cloud server 1 determines whether or not the charging / discharging of the power storage device 52 designated by the user has been successful, depending on whether or not the aforementioned difference in charging / discharging amount is less than the designated charging / discharging amount stored in the designated charging / discharging amount storage unit 134 (step S31). Next, the cloud server 1 generates determination result notification information including designated charging / discharging success / failure information indicating the determination result of whether or not the charging / discharging of the power storage device 52 designated by the user has been successful, and power storage device identification information (step S32). As shown in Fig. 8, the generated determination result notification information is transmitted from the cloud server 1 to the terminal device 3 (step S33). Meanwhile, upon receiving the determination result notification information transmitted from the cloud server 1, the terminal device 3 extracts the designated charging / discharging success / failure information and the power storage device identification information included in the received determination result notification information, and stores the extracted information in the designated charging / discharging success / failure storage unit 333 in association with each other (step S34). Next, the terminal device 3 forms a status notification image to notify the user of the status of the PCS51 based on the charge / discharge amount specified by the user, charge / discharge amount information indicating the operation mode of the PCS51, and operation mode information stored in the specified charge / discharge amount memory unit 331, the operation status information stored in the operation status memory unit 332, and the command charge / discharge success / failure information stored in the specified charge / discharge success / failure memory unit 333, and displays the image on the display unit 304 (step S35).

[0042] Next, the charge / discharge amount measurement process executed by the power amount metering device 62 according to this embodiment will be described with reference to Fig. 9. This charge / discharge amount measurement process is started when the power amount metering device 62 is powered on. First, the power amount information generation unit 621 determines whether the aforementioned power amount measurement time has arrived (step S201). If the power amount information generation unit 621 determines that the power amount measurement time has not yet arrived (step S201: No), the process of step S203, which will be described later, is executed. On the other hand, if the power amount information generation unit 621 determines that the power amount measurement time has arrived (step S201: Yes), the power amount information generation unit 621 generates power amount information indicating the amount of power supplied to the PCS 51 and the electric appliance 4 based on the current values ​​measured by the current transformers CT621 and CT622. Then, the power amount information generation unit 621 stores the generated power amount information in the power amount memory unit 623 in association with date and time information indicating the time when the power amount was measured as measured by the timing unit 622 and device identification information identifying the PCS 51 and the electrical device 4 (step S202).

[0043] Next, the power amount notification unit 624 determines whether or not the above-mentioned power amount information request information transmitted from the cloud server 1 has been acquired (step S203). If the power amount notification unit 624 determines that the power amount information request information has not been acquired (step S203: No), the process of step S201 is executed again. On the other hand, if the power amount notification unit 624 determines that the power amount information request information has been acquired (step S203: Yes), it sets the above-mentioned reference time point for calculating the accumulated charge / discharge amount (step S204). Next, the power amount notification unit 624 refers to the power amount information associated with the device identification information of the PCS 51, which is stored in the power amount information storage unit, and calculates the accumulated charge / discharge amount from the preset reference time point at the time when the power amount information request information was acquired (step S205). Thereafter, the power amount notification unit 224 generates power amount notification information including accumulated charge / discharge amount information indicating the calculated accumulated charge / discharge amount and stored power amount identification information for identifying the power storage device 52 connected to the PCS 51, and transmits the power amount notification information to the cloud server 1 (step S206). Next, the process of step S201 is executed again.

[0044] Next, the power storage device management process executed by the cloud server 1 according to this embodiment will be described with reference to Fig. 10. This power storage device management process is started when a program for executing the power storage device management process is started in the cloud server 1. In parallel with this power storage device management process, the charge / discharge command acquisition unit 113 acquires stop command information for stopping the operation of the PCS 51, transmitted from the terminal device 3, and notifies the control information notification unit 114 of the acquired stop command information, and the control information notification unit 114 generates control information for stopping the operation of the PCS 51, and transmits the generated control information to the PCS 51, when the control information notification unit 114 is notified of the stop command information from the charge / discharge command acquisition unit 113.

[0045] First, the charge / discharge command acquisition unit 113 determines whether or not the charge / discharge command information transmitted from the terminal device 3 has been acquired (step S101). If the charge / discharge command acquisition unit 113 determines that the charge / discharge command information has not been acquired (step S101: No), the process of step S110, which will be described later, is executed. On the other hand, if the charge / discharge command acquisition unit 113 determines that the charge / discharge command information has been acquired (step S101: Yes), the charge / discharge command acquisition unit 113 extracts, from the acquired charge / discharge command information, charge / discharge amount information indicating the charge / discharge amount specified by the user, operation mode information indicating the operation mode of the PCS 51 specified by the user, and power storage device identification information. Then, the charge / discharge command acquisition unit 113 associates the extracted charge / discharge amount information and the power storage device identification information with each other and stores them in the specified charge / discharge amount storage unit 134 (step S102). Here, charge / discharge command acquisition unit 113 notifies control information notification unit 114 of the extracted charge / discharge amount information, operation mode information, and power storage device identification information.

[0046] Next, the control information notification unit 114 generates control information for operating the PCS 51 in the charge mode or the discharge mode based on the charge / discharge amount information, operation mode information, and power storage device identification information notified by the charge / discharge command acquisition unit 113, and transmits the generated control information to the PCS 51 (step S103). At this time, the control information notification unit 114 notifies the power amount information acquisition unit 111 of operation start notification information notifying that the PCS 51 is to start operating, and the power storage device identification information.

[0047] Subsequently, when the operation information acquisition unit 112 acquires operation notification information transmitted from the PCS 51 (step S104), it extracts the operation mode information, operation state information, and power storage device identification information included in the acquired operation notification information, and stores the extracted information in the operation state storage unit 132 in association with one another (step S105). Furthermore, when the power amount information acquisition unit 111 is notified of the operation start notification information and the power storage device identification information from the control information notifying unit 114, it generates the above-mentioned power amount information request information including the notified power storage device identification information and transmits it to the power amount metering device 62 (step S106). As a result, the power amount information acquisition unit 111 acquires power amount notification information including first accumulated charge / discharge amount information indicating a first accumulated charge / discharge amount to / from the PCS 51 connected to the power storage device 52 identified by the power storage device identification information (step S107). Then, the power amount information acquisition unit 111 extracts the cumulative charge / discharge amount information and the storage device identification information included in the acquired power amount notification information, and stores the extracted cumulative charge / discharge amount information in the power amount memory unit 131 in association with the extracted storage device identification information as first cumulative charge / discharge amount information (step S108).

[0048] Thereafter, the operation state notification unit 115 generates operation state notification information including the operation mode information, operation state information, and power storage device identification information stored in the operation state memory unit 132, and transmits the generated operation state notification information to the terminal device 3 (step S109).

[0049] Next, the operation information acquisition unit 112 determines whether or not it has acquired operation switching notification information transmitted from the PCS 51 (step S110). If the operation information acquisition unit 112 determines that it has not acquired operation switching notification information (step S110: No), the process of step S101 is executed again. On the other hand, if the operation information acquisition unit 112 determines that it has acquired operation switching notification information (step S110: Yes), it extracts operation mode information indicating the post-switching operation mode, operation state information, and power storage device identification information included in the acquired operation switching notification information, and stores the extracted information in the operation state storage unit 132 in association with each other (step S111). At this time, the operation information acquisition unit 112 notifies the power amount information acquisition unit 111 of the operation switching notification information and the power storage device identification information.

[0050] Next, when the operation information acquisition unit 112 notifies the power amount information acquisition unit 111 of the operation switching notification information and the power storage device identification information, the power amount information acquisition unit 111 generates the above-mentioned power amount information request information including the notified power storage device identification information and transmits the request information to the power amount metering device 62 (step S112). As a result, the power amount information acquisition unit 111 acquires power amount notification information including cumulative charge / discharge amount information indicating the cumulative charge / discharge amount of the PCS 51 connected to the power storage device 52 identified by the power storage device identification information (step S113). Thereafter, the power amount information acquisition unit 111 extracts the cumulative charge / discharge amount information and the power storage device identification information included in the acquired power amount notification information, and stores the extracted cumulative charge / discharge amount information in the power amount storage unit 131 in association with the extracted power storage device identification information as second cumulative charge / discharge amount information (step S114).

[0051] Next, the operating state notification unit 115 generates operating state notification information including operating mode information indicating the post-switching operating mode, operating state information, and power storage device identification information stored in the operating state memory unit 132, and transmits the generated operating state notification information to the terminal device 3 (step S115).

[0052] Next, the charge / discharge success / failure determination unit 117 determines whether the charging / discharging of the power storage device 52 designated by the user has been successful, depending on whether the aforementioned difference in charge / discharge amount is less than the designated charge / discharge amount stored in the designated charge / discharge amount storage unit 134 (step S116). Here, the charge / discharge success / failure determination unit 117 determines whether the absolute value of the difference in charge / discharge amount indicated by the difference in charge / discharge amount information newly stored in the charge / discharge amount storage unit 133 is less than the designated charge / discharge amount indicated by the designated charge / discharge amount information. Furthermore, the charge / discharge success / failure determination unit 117 notifies the determination result notifying unit 118 of the designated charge / discharge success / failure information indicating the determination result. Thereafter, when the determination result notifying unit 118 is notified of the designated charge / discharge success / failure information, the determination result notifying unit 118 generates determination result notification information including the notified designated charge / discharge success / failure information and transmits it to the terminal device 3 (step S117). Next, the process of step S101 is executed again.

[0053] As described above, in the power storage device management system according to this embodiment, when the PCS 51 starts operating based on control information transmitted from the cloud server 1 and then switches the operation mode, the charge / discharge amount calculation unit 116 calculates a differential charge / discharge amount corresponding to the difference between the first cumulative charge / discharge amount from the reference point at the start of the operation and the second cumulative charge / discharge amount from the reference point at the switching point. Then, the charge / discharge success / failure determination unit 117 determines whether the charging / discharging of the power storage device 52 specified by the user was successful based on whether the calculated differential charge / discharge amount is less than the specified charge / discharge amount. This allows the user to determine whether the charging / discharging of the power storage device 52 specified by the user was successful when the operation mode of the PCS 51 switches after specifying the charge / discharge amount and starting charging / discharging of the power storage device 52. This allows the user to appropriately manage the amount of power stored in the power storage device 52.

[0054] Furthermore, in the power storage device management system according to the present embodiment, the operation status notification unit 115 of the cloud server 1 generates operation status notification information indicating the operation status of the PCS 51 and transmits it to the terminal device 3, and the determination result notification unit 118 generates determination result notification information indicating the result of determining whether charging or discharging of the power storage device 52 specified by the user has been successful and transmits it to the terminal device 3. Then, based on the operation status notification information and the determination result notification information, the terminal device 3 forms a status notification image that notifies the user of the statuses of the power storage device 52 and the PCS 51 and displays it on the display unit 304. This allows the user to know whether charging or discharging of the power storage device 52 has been completed as specified by checking the status notification image displayed on the display unit 304 of the terminal device 3, thereby providing the advantage of facilitating operation management of the power storage device 52 and the PCS 51.

[0055] (Embodiment 2) The energy storage device management system of this embodiment differs from embodiment 1 in that it includes a PCS status acquisition unit that acquires PCS status information indicating the status of the PCS51 sent from the PCS51 when the cloud server 1 determines by the charge / discharge success / failure determination unit that charging / discharging of the energy storage device 52 specified by the user has failed, and a target charge / discharge amount calculation unit that calculates a target charge / discharge amount corresponding to the difference between the specified charge / discharge amount and the differential charge / discharge amount when it determines that the PCS51 is normal based on the PCS status information.

[0056] The hardware configuration of the power storage device management system according to this embodiment is the same as the hardware configuration of the energy management system according to embodiment 1. Therefore, in the description of this embodiment, the hardware configuration will be described using the symbols shown in Fig. 2 as appropriate. When PCS 51 shown in Fig. 11 acquires PCS status request information that requests transmission of PCS status information indicating the status of its own device, transmitted from cloud server 2001, PCS 51 generates PCS status notification information including PCS status information indicating the status of its own device and power storage device identification information of power storage device 52 connected to its own device, and transmits the PCS status notification information to cloud server 2001. This PCS status information is power conversion device status information that indicates whether its own device is normal or whether an abnormality has occurred in its own device.

[0057] Furthermore, in the cloud server 2001 according to this embodiment, the processing unit 101 reads out a program stored in the auxiliary storage unit 103 into the main storage unit 102 and executes it, thereby functioning as an energy information acquisition unit 111, an operation information acquisition unit 112, a charge / discharge command acquisition unit 113, a control information notification unit 2114, an operation status notification unit 115, a charge / discharge amount calculation unit 116, a charge / discharge success / failure determination unit 117, a determination result notification unit 118, a PCS status acquisition unit 2119, and a target charge / discharge amount calculation unit 2120. Note that in FIG. 11, the same components as those in the first embodiment are denoted by the same reference numerals as in FIG. 3. The PCS status acquisition unit 2119 is a power electronics device status acquisition unit that acquires the aforementioned PCS status notification information transmitted from the PCS 51. When the charge / discharge success / failure determination unit 117 determines that the charging / discharging of the power storage device 52 designated by the user has failed, the PCS status acquisition unit 2119 generates the aforementioned PCS status request information and transmits it to the PCS 51. As a result, when the PCS status acquisition unit 2119 acquires the aforementioned PCS status notification information transmitted from the PCS 51, it extracts the PCS status information and the storage device identification information contained in the acquired PCS status notification information, and notifies the target charge / discharge amount calculation unit 2120 of the extracted information.

[0058] When the PCS status notification information notified by the PCS status acquisition unit 2119 indicates that the PCS 51 is normal, the target charge / discharge amount calculation unit 2120 identifies the designated charge / discharge amount information stored in the designated charge / discharge amount storage unit 134 and associated with the notified power storage device identification information, and the differential charge / discharge amount information stored in the charge / discharge amount storage unit 133 and associated with the notified power storage device identification information. Furthermore, the target charge / discharge amount calculation unit 2120 calculates a target charge / discharge amount corresponding to the difference between the designated charge / discharge amount indicated by the identified designated charge / discharge amount information and the differential charge / discharge amount indicated by the identified differential charge / discharge amount information. The target charge / discharge amount calculation unit 2120 then notifies the control information notification unit 2114 of the target charge / discharge amount information indicating the calculated target charge / discharge amount. On the other hand, if the PCS state notification information notified from the PCS state acquisition unit 2119 indicates that an abnormality has occurred in the PCS 51, the target charge / discharge amount calculation unit 2120 notifies the operating state notification unit 115 of the PCS abnormality notification information and the storage device identification information.

[0059] The control information notification unit 2114 has the same function as the control information notification unit 114 described in the first embodiment, and generates control information based on operation mode information indicating an operation mode designated by a user and stored in the designated charge / discharge amount storage unit 134, and the calculated target charge / discharge amount, and transmits the control information to the PCS 51. Here, when the control information notification unit 2114 is notified of the target charge / discharge amount information from the target charge / discharge amount calculation unit 2120, it generates control information based on the operation mode information stored in the designated charge / discharge amount storage unit 134 and the notified target charge / discharge amount, and transmits the control information to the PCS 51.

[0060] When the operation status notification unit 115 receives PCS abnormality notification information and storage device identification information from the target charge / discharge amount calculation unit 2120, it generates operation status notification information including operation status information indicating that the PCS 51 connected to the storage device 52 identified by the storage device identification information is stopped, and transmits the information to the terminal device 3.

[0061] Next, the power storage device management process executed by the cloud server 2001 according to this embodiment will be described with reference to Fig. 12. Note that in Fig. 12, the same processes as those in the first embodiment are denoted by the same reference numerals as those in Fig. 10. First, after a series of processes from steps S101 to S115 are executed, the charge / discharge success / failure determination unit 117 determines whether charging / discharging of the power storage device 52 designated by the user has been successful, depending on whether the differential charge / discharge amount described in the first embodiment is less than the designated charge / discharge amount stored in the designated charge / discharge amount storage unit 134 (step S2101). Here, when the charge / discharge success / failure determination unit 117 determines that charging / discharging of the power storage device 52 designated by the user has been successful (step S2101: Yes), it generates determination result notification information including charge / discharge success / failure information indicating that charging / discharging of the power storage device 52 designated by the user has been successful, and transmits the determination result notification information to the terminal device 3 (step S117).

[0062] On the other hand, it is assumed that the charge / discharge success / failure determination unit 117 determines that the charging / discharging of the power storage device 52 specified by the user has failed (step S2101: No). In this case, the PCS status acquisition unit 2119 generates the above-mentioned PCS status request information and transmits it to the PCS 51 (step S2102). As a result, when the PCS status acquisition unit 2119 acquires the above-mentioned PCS status notification information transmitted from the PCS 51 (step S2103), it extracts the PCS status information and power storage device identification information included in the acquired PCS status notification information, and notifies the target charge / discharge amount calculation unit 2120 of the extracted information.

[0063] Next, the target charge / discharge amount calculation unit 2120 determines whether the PCS state notification information notified from the PCS state acquisition unit 2119 indicates that the PCS 51 is normal (step S2104). If the target charge / discharge amount calculation unit 2120 determines that the PCS state notification information indicates that an abnormality has occurred in the PCS 51 (step S2104: No), it notifies the operation state notification unit 115 of the PCS abnormality notification information. Then, the operation state notification unit 115 generates operation state notification information including operation state information indicating that the PCS 51 connected to the power storage device 52 identified by the power storage device identification information is stopped, and transmits the operation state notification information to the terminal device 3 (step S2105), and the processing of step S101 is executed again.

[0064] On the other hand, when the target charge / discharge amount calculation unit 2120 determines that the PCS 51 is normal (step S2104: Yes), it calculates the target charge / discharge amount based on the designated charge / discharge amount information stored in the designated charge / discharge amount storage unit 134 and associated with the notified power storage device identification information, and the difference charge / discharge amount information stored in the charge / discharge amount storage unit 133 and associated with the notified power storage device identification information (step S2106). At this time, the target charge / discharge amount calculation unit 2120 notifies the control information notification unit 2114 of the target charge / discharge amount information indicating the calculated target charge / discharge amount. Next, the control information notification unit 2114 generates control information based on the operation mode information stored in the designated charge / discharge amount storage unit 134 and the notified target charge / discharge amount, and transmits the control information to the PCS 51 (step S2107). Thereafter, the process of step S104 is executed again.

[0065] As described above, according to the power storage device management system of this embodiment, when charging / discharging of the power storage device 52 by the PCS 51 is stopped, charging / discharging is resumed as is unless there is an abnormality in the PCS 51. Therefore, the user does not need to perform any operation to resume charging / discharging of the power storage device 52 by the PCS 51, thereby improving user convenience.

[0066] (Embodiment 3) The energy storage device management system of this embodiment differs from embodiments 1 and 2 in that the cloud server includes an excess power status determination unit 3121 that determines whether or not there is excess power on the side of the PCS 51 opposite the energy storage device 52 when the charge / discharge success / failure determination unit 117 determines that charging / discharging of the energy storage device 52 specified by the user has failed.

[0067] The power storage device management system according to the present embodiment manages the charge / discharge amount of a power storage device 52 in a building H in which a power generation facility 3082 that uses sunlight, a photovoltaic (PV) converter 3081 that supplies power generated by the power generation facility 3082 to a distribution board 61, and a power storage device 52 are installed together, as shown in Fig. 13 . Note that in Fig. 13 , the same components as in the first embodiment are denoted by the same reference numerals as in Fig. 1. The PV converter 3081 has a DC / AC converter and has a function of converting DC power supplied from the power generation facility 3082 into AC power and outputting it to the distribution board 61 side. A PCS 3051 shown in Fig. 13 has a function similar to that of the PCS 51 described in the first embodiment. Here, the power flow detection unit 513 of the PCS3051 detects the direction and magnitude of power flow between the PCS51 and the distribution board 61 using a current transformer CT511 inserted between the PCS51 and the distribution board 61, and detects the direction and magnitude of power flow between the distribution board 61 and the system power supply PS using a current transformer CT512 inserted between the distribution board 61 and the system power supply PS. The PCS3051 has a function of generating power flow information that indicates the direction and magnitude of power flow between the distribution board 61 and the system power supply PS detected by the power flow detection unit 513. When the PCS51 receives power flow information request information that requests the transmission of power flow information from the cloud server 3001, it generates power flow information in response and transmits it to the cloud server 3001.

[0068] The hardware configuration of the power storage device management system according to this embodiment is the same as the hardware configuration of the energy management system according to embodiment 1. Therefore, in the description of this embodiment, the hardware configuration will be described using the symbols shown in FIG. 2 as appropriate. In the cloud server 3001 according to this embodiment, the processing unit 101 reads out a program stored in the auxiliary storage unit 103 into the main storage unit 102 and executes it, thereby functioning as an energy amount information acquisition unit 3111, an operation information acquisition unit 112, a charge / discharge command acquisition unit 113, a control information notification unit 2114, an operation status notification unit 115, a charge / discharge amount calculation unit 116, a charge / discharge success / failure determination unit 117, a determination result notification unit 118, a PCS status acquisition unit 2119, a target charge / discharge amount calculation unit 2120, and a surplus energy amount status determination unit 3121, as shown in FIG. 14. Note that in FIG. 14, the same components as those in embodiments 1 and 2 are denoted by the same symbols as those in FIGS. 3 and 11. When the charge / discharge success / failure determination unit 117 determines that charging / discharging of the power storage device 52 specified by the user has failed, the surplus power status determination unit 3121 generates the above-mentioned power flow information request information and transmits it to the PCS 3051. In response to this, the surplus power status determination unit 3121 acquires the power flow information transmitted from the PCS 3051. Then, when the acquired power flow information indicates a power flow in the direction from the distribution board 61 to the grid power supply PS, i.e., a reverse power flow, the surplus power status determination unit 3121 determines that there is surplus power. On the other hand, when the acquired power flow information indicates a power flow from the grid power supply PS to the distribution board 61, the surplus power status determination unit 3121 determines that there is no surplus power.

[0069] When the PCS status notification information notified from the PCS status acquisition unit 2119 indicates that the PCS 51 is normal, and the operation mode of the PCS 3051 specified by the user is the charge mode and the surplus power status determination unit 3121 determines that there is surplus power, the target charge / discharge amount calculation unit 2120 calculates a target charge amount equivalent to the difference between the specified charge amount specified by the user and the differential charge / discharge amount. Also, when the PCS status notification information notified from the PCS status acquisition unit 2119 indicates that the PCS 51 is normal, and the operation mode of the PCS 3051 specified by the user is the discharge mode and the surplus power status determination unit 3121 determines that there is no surplus power, the target charge / discharge amount calculation unit 2120 calculates a target discharge amount equivalent to the difference between the specified discharge amount specified by the user and the differential charge / discharge amount.

[0070] Next, the power storage device management process executed by the cloud server 3001 according to this embodiment will be described with reference to FIGS. 15 to 17. Note that in FIGS. 15 and 16, the same processes as those in the first and second embodiments are denoted by the same reference numerals as those in FIG. 10 or 12. First, after a series of processes from steps S101 to S115 are executed, the charge / discharge success / failure determination unit 117 determines whether charging / discharging of the power storage device 52 designated by the user has been successful, depending on whether the differential charge / discharge amount described in the first embodiment is less than the designated charge / discharge amount stored in the designated charge / discharge amount storage unit 134 (step S2101). Here, when the charge / discharge success / failure determination unit 117 determines that charging / discharging of the power storage device 52 designated by the user has been successful (step S2101: Yes), it generates determination result notification information including charge / discharge success / failure information indicating that charging / discharging of the power storage device 52 designated by the user has been successful, and transmits the determination result notification information to the terminal device 3 (step S116).

[0071] On the other hand, it is assumed that the charge / discharge success / failure determination unit 117 determines that the charge / discharge of the power storage device 52 specified by the user has failed (step S2101: No). In this case, the PCS status acquisition unit 2119 executes the processes of steps S2102 and S2103, extracts the PCS status information and the power storage device identification information included in the acquired PCS status notification information, and notifies the target charge / discharge amount calculation unit 2120 and the surplus power status determination unit 3121 of the extracted information.

[0072] Next, the target charge / discharge amount calculation unit 2120 and the surplus power status determination unit 3121 determine whether the PCS state notification information notified by the PCS state acquisition unit 2119 indicates that the PCS 51 is normal (step S2104). If the target charge / discharge amount calculation unit 2120 determines that the PCS state notification information indicates that an abnormality has occurred in the PCS 51 (step S2104: No), it notifies the operation state notification unit 115 of the PCS abnormality notification information. Then, the operation state notification unit 115 generates operation state notification information including operation state information indicating that the PCS 51 connected to the power storage device 52 identified by the power storage device identification information is stopped, and transmits the operation state notification information to the terminal device 3 (step S2105), and the processing of step S101 is executed again.

[0073] On the other hand, if the surplus power status determination unit 3121 determines that the PCS 51 is normal (step S2104: Yes), after a preset time has elapsed, it generates the power flow information request information and transmits it to the PCS 3051 (step S3101). Here, the preset time can be set to, for example, a length between several minutes and several hours. As a result, as shown in FIG. 16, the surplus power status determination unit 3121 acquires the power flow information transmitted from the PCS 3051 (step S3102). Next, the surplus power status determination unit 2121 determines whether the operation mode commanded by the charge / discharge command information is the charge mode (step S3103). Here, if the surplus power status determination unit 2121 determines that the operation mode commanded by the charge / discharge command information is the charge mode (step S3103: Yes), it determines whether there is surplus power based on the acquired power flow information (step S3104). If the surplus power status determining unit 2121 determines that there is no surplus power (step S3104: No), the process proceeds to step S2105.

[0074] In this case, when the terminal device 3 acquires the operation status notification information transmitted from the cloud server 3001, the display control unit 313 may form a status notification image GA2 as shown in Fig. 17, for example, and display it on the display unit 304. The status notification image GA2 includes a message image M3012 including "waiting for restart," which indicates that the PCS 3052 can be operated again in charging mode when surplus power occurs, for example. Note that in Fig. 17, the same components as those in the status notification image GA1 described in the first embodiment are denoted by the same reference numerals as in Fig. 7.

[0075] Returning to FIG. 16 , on the other hand, it is assumed that the surplus power status determination unit 2121 determines that there is surplus power (step S3104: Yes). In this case, the target charge / discharge amount calculation unit 3120 calculates the target charge amount based on the designated charge amount information stored in the designated charge / discharge amount storage unit 134 and associated with the notified power storage device identification information, and the differential charge amount information stored in the charge / discharge amount storage unit 133 and associated with the notified power storage device identification information (step S3105). At this time, the target charge / discharge amount calculation unit 2120 notifies the control information notification unit 2114 of target charge amount information indicating the calculated target charge amount. Next, the control information notification unit 2114 generates control information based on the operation mode information stored in the designated charge / discharge amount storage unit 134 and the notified target charge amount information, and transmits the control information to the PCS 3051 (step S3106). Thereafter, the process of step S104 is executed again.

[0076] Furthermore, if the surplus power status determination unit 2121 determines in step S3103 that the operation mode commanded by the charge / discharge command information is the discharge mode (step S3103: No), it determines whether or not there is surplus power based on the acquired instantaneous power information (step S3107). Here, if the surplus power status determination unit 2121 determines that there is surplus power (step S3107: No), the process of step S2105 is executed. On the other hand, it is assumed that the surplus power status determination unit 2121 determines that there is no surplus power (step S3107: Yes). In this case, the target charge / discharge amount calculation unit 3120 calculates the target discharge amount based on the designated discharge amount information associated with the notified power storage device identification information stored in the designated charge / discharge amount storage unit 134 and the differential discharge amount information associated with the notified power storage device identification information stored in the charge / discharge amount storage unit 133 (step S3108). At this time, the target charge / discharge amount calculation unit 2120 notifies the control information notification unit 2114 of target discharge amount information indicating the calculated target discharge amount. Next, the control information notification unit 2114 generates control information based on the operation mode information stored in the specified charge / discharge amount storage unit 134 and the notified target discharge amount information, and transmits the control information to the PCS 51 (step S3106). Thereafter, the process of step S104 is executed again.

[0077] As described above, according to the energy storage device management system of this embodiment, the operating mode of PCS3051 is set depending on whether or not there is surplus power on the distribution board 61 side of PCS3051, so that charging and discharging of the energy storage device 52 by PCS3051 can be performed appropriately.

[0078] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments. For example, the power storage device management system according to embodiment 3 may be applied to a building H in which a power generation facility 3082 and a PV converter 3081 are not installed.

[0079] In the embodiment, an example has been described in which, when the above-described operation mode switching event occurs in the PCS 51, the PCS 51 generates the above-described operation switching notification information and transmits it to the cloud server 1, and the cloud server 1 acquires the operation switching notification information to detect the switching of the operation mode of the PCS 51. However, this is not limiting, and the cloud server 1 may periodically acquire operation mode information indicating the operation mode of the PCS 51 from the PCS 51, and detect the switching of the operation mode of the PCS 51 based on the acquired operation mode information.

[0080] Furthermore, the various functions of the cloud server 1, 2001, information collection device 2, 2002, and terminal device 3, 2003 according to the present disclosure may be realized by software, firmware, or a combination of software and firmware. In this case, the software or firmware may be written as a program, and the program may be stored and distributed on a computer-readable recording medium such as a flexible disk, CD-ROM (Compact Disc Read Only Memory), DVD (Digital Versatile Disc), or MO (Magneto-Optical Disc). The program may then be read and installed on a computer to configure a computer capable of realizing each of the aforementioned functions. Furthermore, if each function is realized by sharing the work between an operating system (OS) and an application, or by cooperation between the OS and the application, only the parts other than the OS may be stored on the recording medium.

[0081] Furthermore, each program can be superimposed on a carrier wave and distributed over a network. For example, the program can be posted on a bulletin board system (BBS) on the network and distributed over the network. These programs can then be started and run under the control of the OS in the same way as other application programs, thereby enabling the above-mentioned processing to be performed. [Industrial Applicability]

[0082] The present disclosure is suitable for an energy management system having a function of downloading information relating to power amount information to a terminal device. [Explanation of symbols]

[0083] 1,2001,3001 Cloud server, 3 Terminal device, 4 Electrical equipment, 7 BBR, 51,3051 PCS, 52 Power storage device, 61 Distribution board, 62 Power amount measuring device, 31 Controller, 32 Water heater power measurement unit, 39,229 Communication adapter, 61 BBR, 101 Processing unit, 102,302 Main memory unit, 103,303 Auxiliary memory unit, 106,306 Communication unit, 109,309 Bus, 111 Power amount acquisition unit, 112 Operation information acquisition unit, 113 Charge / discharge command acquisition unit, 114,2114 Control information notification unit, 115 Operation status notification unit, 116 Charge / discharge amount calculation unit, 117 Charge / discharge success / failure determination unit, 118 Determination result notification unit, 131,623 Power amount memory unit, 132,332 Operation status memory unit, 133 charge / discharge amount memory unit, 134, 331 specified charge / discharge amount memory unit, 301 CPU, 304 display unit, 305 input unit, 311 charge / discharge command notification unit, 312 operation status acquisition unit, 313 display control unit, 314 judgment result acquisition unit, 333 specified charge / discharge success / failure memory unit, 512 converter control unit, 513 power flow detection unit, 621 power amount information generation unit, 622 timing unit, 624 power amount notification unit, 2119 PCS status acquisition unit, 2120, 3120 target charge / discharge amount calculation unit, 3121 surplus power status determination unit, 3081 PV converter, 3082 power generation equipment, 5111 bidirectional DC / DC converter, 5112 bidirectional DC / AC converter, B11, B12 input field image, BU11 Button image, CT511,CT512,CT621,CT622 current transformers, GA1,GA2 status notification image, H building, M11,M12,M22 message image, NW1 wide area network, NW2 local network, PS system power supply

Claims

1. a power storage device management device that switches an operation mode between a charge mode for charging a power storage device and a discharge mode for discharging the power storage device based on first control information for charging or discharging the power storage device, and manages the amount of power stored in the power storage device by controlling a power conversion device whose operation mode is switched according to a power usage situation in a power consumption area where the power storage device is installed, a control information notification unit that generates the first control information based on the operation mode of the power electronics device designated by a user and a designated charge / discharge amount of the power storage device designated by the user, and transmits the first control information to the power electronics device; a charge / discharge amount calculation unit that, when the operation mode is switched from either the charge mode or the discharge mode to the other after the power conversion device has started operation based on the first control information, calculates a difference in charge / discharge amount corresponding to a difference between a first accumulated charge / discharge amount from a preset reference time point at the start of operation when the power conversion device has started operation based on the first control information and a second accumulated charge / discharge amount from the reference time point at a switching time point when the operation mode is switched; a charge / discharge success / failure determination unit that determines whether charging / discharging of the power storage device designated by the user has been successful depending on whether the difference in charge / discharge amount is less than the designated charge / discharge amount. Power storage device management device.

2. a power conversion device status acquisition unit that acquires power conversion device status information indicating a status of the power conversion device, the power conversion device status information being transmitted from the power conversion device when the charge / discharge success / failure determination unit determines that charging / discharging of the power storage device designated by the user has failed; a target charge / discharge amount calculation unit that calculates a target charge / discharge amount corresponding to a difference between the designated charge / discharge amount and the difference charge / discharge amount when it is determined that the power conversion device is normal based on the power conversion device state information, the control information notification unit generates second control information for charging or discharging the power storage device based on the operation mode designated by a user and the calculated target charge / discharge amount, and transmits the second control information to the power conversion device. The power storage device management device according to claim 1 .

3. an excess power status determination unit that determines whether or not there is excess power on the opposite side of the power storage device in the power conversion device when the charge / discharge success / failure determination unit determines that the charge / discharge of the power storage device designated by the user has failed; a target charge / discharge amount calculation unit that calculates a target charge amount corresponding to the difference between a designated charge amount designated by the user and the charge / discharge difference amount when it is determined that the operation mode designated by the user is the charge mode and there is surplus power, and that calculates a target discharge amount corresponding to the difference between a designated discharge amount designated by the user and the charge / discharge difference amount when it is determined that the operation mode designated by the user is the discharge mode and there is no surplus power, The power storage device management device according to claim 1 .

4. a power conversion device whose operation mode is switched between a charge mode for charging the power storage device and a discharge mode for discharging the power storage device based on first control information for charging or discharging the power storage device, and whose operation mode is switched according to the power usage status of a power consumption area where the power storage device is installed; a control information notification unit that generates the first control information based on the operation mode of the power electronics device designated by a user and a designated charge / discharge amount of the power storage device designated by the user, and transmits the first control information to the power electronics device; a charge / discharge amount calculation unit that, when the operation mode is switched from either the charge mode or the discharge mode to the other after the power conversion device has started operation based on the first control information, calculates a difference in charge / discharge amount corresponding to a difference between a first accumulated charge / discharge amount from a preset reference time point at the start of operation when the power conversion device has started operation based on the first control information and a second accumulated charge / discharge amount from the reference time point at a switching time point when the operation mode is switched; a charge / discharge success / failure determination unit that determines whether charging / discharging of the power storage device designated by the user has been successful depending on whether the difference in charge / discharge amount is less than the designated charge / discharge amount. Energy storage device management system.

5. a terminal device having a display unit; an operation state notification unit that generates operation state notification information indicating an operation state of the power electronics device and transmits the information to the terminal device; a determination result notifying unit that generates determination result notification information indicating a result of determining whether charging or discharging of the power storage device designated by the user has been successful, and transmits the determination result notification information to the terminal device; the terminal device forms a status notification image notifying a user of the statuses of the power storage device and the power conversion device based on the operation status notification information and the determination result notification information, and displays the image on the display unit. The power storage device management system according to claim 4 .

6. A power storage device management method in which an operation mode is switched to either a charge mode for charging a power storage device or a discharge mode for discharging the power storage device based on first control information in order to charge or discharge the power storage device, and an amount of stored power in the power storage device is managed by controlling a power conversion device whose operation mode is switched in accordance with a power usage situation in a power consumption area where the power storage device is installed, generating the first control information based on the operation mode of the power electronics device designated by a user and a designated charge / discharge amount of the power storage device designated by the user, and transmitting the first control information to the power electronics device; When the operation mode is switched from either the charge mode or the discharge mode to the other after the power conversion device starts operation based on the first control information, calculating a differential charge / discharge amount corresponding to a difference between a first accumulated charge / discharge amount from a preset reference point at the start of operation when the power conversion device starts operation based on the first control information and a second accumulated charge / discharge amount from the reference point at a switching point at which the operation mode is switched; determining whether or not the charging / discharging of the power storage device designated by the user has been successful depending on whether or not the difference in charging / discharging amount is less than the designated charging / discharging amount; Energy storage device management method.

7. Computer, a control information notification unit that generates and transmits the first control information to the power conversion device based on an operation mode of a power conversion device, the operation mode of which is switched between a charge mode for charging the power storage device and a discharge mode for discharging the power storage device, based on first control information specified by a user for charging or discharging the power storage device, and the operation mode is switched depending on a power usage situation in a power consumption area where the power storage device is installed, and a specified charge / discharge amount of the power storage device specified by the user; a charge / discharge amount calculation unit that, when the operation mode is switched from either the charge mode or the discharge mode to the other after the power conversion device has started operation based on the first control information, calculates a difference in charge / discharge amount corresponding to a difference between a first accumulated charge / discharge amount from a preset reference time point at the start of operation when the power conversion device has started operation based on the first control information and a second accumulated charge / discharge amount from the reference time point at a switching time point when the operation mode is switched; a charge / discharge success / failure determination unit that determines whether or not the charge / discharge of the power storage device designated by the user has been successful, depending on whether or not the difference in charge / discharge amount is less than the designated charge / discharge amount; A program to function as a

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