WO2019208147A1 - Electricity storage device, electricity storage device control device, and electricity storage device control method - Google Patents

Abstract

This electricity storage device is provided with: a first terminal unit connected to a first device in an energizable manner; a second terminal unit connected to a second device in an energizable manner; an electricity storage unit; a wire for connecting the first terminal unit, the second terminal unit, and the electricity storage unit in an energizable manner; a first switch provided in the wire; and a control unit. When detecting an operation abnormality of the second device, the control unit opens the first switch to interrupt the energization between the first terminal unit and the second terminal unit and between the electricity storage unit and the second terminal unit while the first terminal unit and the electricity storage unit are connected to each other in an energizable manner.

Description

Power storage device, power storage device control device, and power storage device control method Cross-reference of related applications

This application claims the priority of Japanese Patent Application No. 2018-82162 filed in Japan on April 23, 2018, the entire disclosure of which is incorporated herein by reference.

The present disclosure relates to a power storage device, a power storage device control device, and a power storage device control method.

Conventionally, there has been known a technique for cutting off power from a power storage device when an abnormality occurs in the power storage device. For example, Patent Document 1 discloses an inspection safety device that cuts off the power supply from the battery pack to the load so that no further charging can be performed when a battery pack formed by combining a plurality of storage batteries is in an abnormal state. .

JP 2017-073906 A

A power storage device according to an embodiment of the present disclosure includes a first terminal unit connected to be energized with a first device, a second terminal unit connected to be energized with a second device, and a power storage unit. , An electric wire connecting the first terminal portion, the second terminal portion, and the power storage portion so as to be energized, a first switch provided on the electric wire, and a control portion. When the control unit detects an abnormal operation of the second device, the control unit opens the first switch and connects the first terminal unit and the power storage unit so as to be energized. The energization between the first terminal unit and the power storage unit and the second terminal unit is interrupted.

A control device according to an embodiment of the present disclosure includes a first terminal unit connected to be energized with a first device, a second terminal unit connected to be energized with a second device, and a power storage unit. A control device capable of controlling a power storage device comprising: an electric wire connecting the first terminal portion, the second terminal portion, and the power storage portion so as to be energized; and a first switch provided on the electric wire. is there. The control device causes the power storage device to detect an abnormal operation of the second device. When the control device detects an abnormal operation of the second device, the control device opens the first switch so that the first terminal unit and the power storage unit can be energized. In this state, the energization between the first terminal unit and the power storage unit and the second terminal unit is interrupted.

A control method according to an embodiment of the present disclosure includes a first terminal unit connected to be energized with a first device, a second terminal unit connected to be energized with a second device, and a power storage unit. A control method for a power storage device comprising: an electric wire that connects the first terminal portion, the second terminal portion, and the power storage portion so that energization is possible; and a first switch provided on the electric wire. The control method includes a step of detecting an operation abnormality of the second device. In the control method, when an operation abnormality of the second device is detected, the first switch is opened and the first terminal unit and the power storage unit are connected to be energized. Including a step of interrupting energization between the first terminal unit and the power storage unit and the second terminal unit.

1 is a schematic configuration diagram of a power storage system according to an embodiment of the present disclosure. 2 is a sequence chart illustrating an example of an operation of the power storage system illustrated in FIG. 1. 6 is a sequence chart of another example of the operation of the power storage system illustrated in FIG. 1. 3 is a flowchart illustrating an example of processing executed by the power storage device illustrated in FIG. 1. 6 is a flowchart of another example of processing executed by the power storage device illustrated in FIG. 1. It is a sequence chart of the example of the process which the electrical storage system of FIG. 1 performs.

Conventionally, when an abnormality occurs in some of the plurality of power storage devices, a technology for controlling the power storage device to continuously operate a power storage device that does not have an abnormality and can operate normally. Further improvement of usability is desired. The present disclosure provides a power storage device, a power storage device control device, and a power storage device control method that improve the usefulness of a technology for controlling the power storage device.

(Configuration of power storage system)
FIG. 1 is a schematic configuration diagram illustrating an example of a power storage system 1 according to an embodiment of the present disclosure. The power storage system 1 may include devices such as the power conditioner 10 and the power storage devices 20A, 20B, and 20C. In FIG. 1, the power storage devices 20 </ b> A, 20 </ b> B, and 20 </ b> C are connected in parallel by an electric wire 40 and are connected to the power system 60 via the power conditioner 10. In the present specification, among devices connected via the electric wire 40, a device connected to a position closer to the power system 60 is referred to as an “upper” device, and a device connected to a farther position is referred to as a “lower” device. It is called equipment. In FIG. 1, each device is connected in the order of the power conditioner 10 and the power storage devices 20 </ b> A, 20 </ b> B, and 20 </ b> C so that the power conditioner 10 is positioned at the highest level and the power storage device 20 </ b> C is positioned at the lowest level. For example, when focusing on the power storage device 20A, it can be said that the power conditioner 10 is a device connected to a higher level of the power storage device 20A, and the power storage devices 20B and 20C are devices connected to a lower level of the power storage device 20A. In FIG. 1, the electric wire 40 is indicated by a solid line. The power storage system 1 is connected to the power system 60 and supplies power to a load 70 and the like connected to the power system 60. The load 70 may include any electric device that consumes electric power, such as an illumination, an air conditioner, or an information processing device. In addition, the power storage system 1 stores the power supplied from the power grid 60 in the power storage devices 20A, 20B, and 20C. Hereinafter, when the power storage devices 20A, 20B, and 20C are not particularly distinguished, they are simply referred to as a power storage device 20 in general. In the power storage system 1, devices included in the power storage system 1 such as the power conditioner 10 and the power storage device 20 are communicably connected to each other via a communication line 50. In FIG. 1, the communication line 50 is indicated by a dotted line. The communication line 50 can be configured in a bus type, for example. In FIG. 1, a power storage system 1 including one power conditioner 10 and three power storage devices 20 is illustrated as an example, but the configuration and number of devices included in the power storage system 1 are arbitrarily determined. May be. For example, the power conditioner 10 and the power storage device 20 may be added or removed according to requirements such as the power storage capacity required for the power storage system 1. The communication line 50 may be wired or wireless.

The power conditioner 10 is also referred to as a PCS (Power Conditioning System). The power conditioner 10 controls, for example, input / output of power from the power storage device 20 to the power system 60 or the load 70, or converts DC power output from the power storage device 20 into AC power to convert the power system 60 or Output to load 70 and the like. When any of the power storage devices 20 of the power storage system 1 is damaged or malfunctions, the power conditioner 10 may disconnect all of the power storage devices 20 connected lower than the power conditioner 10. Thereby, electricity supply with the electrical storage system 1 and the exterior is interrupted | blocked, and operation | movement, such as charging / discharging of the electrical storage system 1 whole, may be interrupted.

The power storage device 20 supplies power to the load 70 and the like connected to the power system 60. The power storage device 20 may supply power that can be sold to the power system 60. In addition, the power storage device 20 stores the power supplied from the power system 60. The power storage device 20 may perform operations such as supply and storage of power and provision of information regarding the power storage device 20 itself based on the control signal received from the power conditioner 10.

In the power storage system 1 according to an embodiment of the present disclosure, when any of the power storage devices 20 in the system is damaged or malfunctions and becomes abnormal in operation, the power storage device 1 is positioned above the abnormal storage device as will be described in detail later. The switch of the power storage device or the switch of the power storage device itself with abnormal operation can be opened. As a result, the power storage device that has become abnormal in operation is disconnected, and operations such as charging / discharging of the power storage system 1 can be continued in a degenerated state by some power storage devices. Hereinafter, the power storage device itself is also referred to as a self device.

(Configuration of power storage device)
Below, schematic structure of the electrical storage apparatus 20 which is an example of the electrical storage apparatus which concerns on one Embodiment of this indication is shown. In FIG. 1, the power storage device 20 includes a control unit 21, a power storage unit 22, a first terminal unit 23, a second terminal unit 24, an electric wire 25, a first switch 26, a second switch 27, and a communication unit. 28, a functional unit such as a storage unit 29, a notification unit 30, and an input unit 31.

The control unit 21 is one or more processors that provide control and processing capabilities for realizing each function of the power storage device 20, as will be described in detail later. The control unit 21 may be configured by a processor such as a CPU (Central Processing Unit) that executes a program that defines a control procedure, or a dedicated processor specialized for processing of each function.

The control unit 21 is connected to each functional unit of the power storage device 20 described above by wire or wirelessly, and controls and manages all or a part of the power storage device 20 including these functional units. The control unit 21 obtains a program stored in the storage unit 29 and executes this program, thereby realizing various functions related to each functional unit of the power storage device 20. Control characteristic of the present embodiment performed by the control unit 21 will be further described later.

The power storage unit 22 charges and discharges electric power based on the control of the control unit 21. The power storage unit 22 is arranged to be energized to the outside of the power storage device 20 via two first terminal units 23 and a second terminal unit 24 described later. The charging and discharging of electric power in the power storage unit 22 may be controlled and managed by the control unit 21 in units of cells constituting the power storage unit 22. The power storage unit 22 may include a plurality of cells. The cells may be controlled and managed by the control unit 21 in units of modules in which a plurality of cells are connected.

The first terminal portion 23 and the second terminal portion 24 include terminals to which the electric wires 40 and the like are connected from the outside of the power storage device 20. In the present embodiment, it is assumed that the power storage device 20 is connected to other devices by a single-phase two-wire system. Therefore, the first terminal portion 23 and the second terminal portion 24 may include a positive electrode terminal 23A (24A) and a negative electrode terminal 23B (24B), respectively. For example, there are various methods for connecting power storage devices including the power storage device 20, such as a single-phase two-wire method, a single-phase three-wire method, a three-phase three-wire method, and a three-phase four-wire method. The number of terminals included in the first terminal portion 23 and the second terminal portion 24 can be any number depending on the connection method of the power storage device.

The first terminal portion 23 and the second terminal portion 24 are connected to different devices through the electric wires 40 so as to be energized. The 1st terminal part 23 is connected with the 1st apparatus so that electricity supply is possible. The 2nd terminal part 24 is connected with the 2nd apparatus so that electricity supply is possible. The first device and the second device may be devices such as the power conditioner 10 or the power storage device 20, for example. The devices connected by the electric wires 40 are not limited to the power conditioner 10 and the power storage device 20. For example, any power supply device including a solar cell, a wind power generation device, a hydroelectric power generation device, a fuel cell, or an information processing device may be used. Any device may be included. In the present embodiment, the first device may be a higher device among the two devices connected to the power storage device 20, and the second device may be a lower device.

1, the positive terminal 23A and the negative terminal 23B of the first terminal portion 23 of the power storage device 20A are connected to the positive terminal and the negative terminal of the power conditioner 10 through the electric wires 40A and 40B, respectively. The positive terminal 24A and the negative terminal 24B of the second terminal portion 24 of the power storage device 20A are connected to the positive terminal 23A and the negative terminal 23B of the first terminal portion 23 of the power storage device 20B via electric wires 40C and 40D, respectively. Further, the positive terminal 24A and the negative terminal 24B of the second terminal portion 24 of the power storage device 20B are connected to the positive terminal 23A and the negative terminal 23B of the first terminal portion 23 of the power storage device 20C via the electric wires 40E and 40F, respectively. The Thereby, in power storage system 1, power storage devices 20A, 20B, and 20C are connected in parallel. In the present embodiment, the power storage device 20 is described as including two terminal portions, ie, a first terminal portion 23 and a second terminal portion 24, but the number of terminal portions is an arbitrary number equal to or greater than two. Also good.

1st terminal part 23, 2nd terminal part 24, and electrical storage part 22 are connected by electric wire 25 so that electricity supply is possible. The number of the electric wires 25 may be an arbitrary number. In FIG. 1, the electric wire 25 includes an electric wire 25 </ b> A that connects the positive terminals of the first terminal portion 23, the second terminal portion 24, and the power storage unit 22, and an electric wire 25 </ b> B that connects the negative terminals. It is included.

The first switch 26 is provided on the electric wire 25. Specifically, when the first switch 26 is closed while the second switch 27 is closed, the first switch unit 26 and the second terminal unit 24 are connected to each other. It is provided in the electric wire 25 so that the electrical storage part 22 may be connected so that electricity supply is possible. Thereby, the electrical storage part 22 of the electrical storage apparatus 20 and the apparatus connected to each of the 1st terminal part 23 and the 2nd terminal part 24 are connected so that electricity supply is possible. On the other hand, when the first switch 26 is opened with the second switch 27 closed, the first switch 26 connects the first terminal unit 23 and the power storage unit 22 so as to be energized. In this state, the electric wire 25 is provided so as to cut off energization between the first terminal unit 23 and the power storage unit 22 and the second terminal unit 24. As a result, the first device connected to the first terminal unit 23 and the power storage unit 22 of the power storage device 20 are connected so as to be energized, and the first device and the power storage unit 22 and the second terminal unit are connected. The energization with the second device connected to 24 is cut off. The number of the first switches 26 may be an arbitrary number. When the electric wire 25 includes a plurality of electric wires 25A and 25B, the first switch 26 may be provided for each of the plurality of electric wires.

The second switch 27 is provided on the electric wire 25. Specifically, when the second switch 27 is closed in a state where the first switch 26 is closed, the second switch 27 includes the first terminal portion 23 and the second terminal portion 24. It is provided in the electric wire 25 so that the electrical storage part 22 may be connected so that electricity supply is possible. On the other hand, the second switch 27 energizes the first terminal portion 23 and the second terminal portion 24 when the second switch 27 is opened with the first switch 26 closed. It is provided in the electric wire 25 so as to cut off the energization between the first terminal portion 23 and the second terminal portion 24 and the power storage unit 22 in a connected state. Therefore, the second switch 27 enables energization of the power storage unit 22 of the power storage device 20 and external devices connected to the first terminal unit 23 and the second terminal unit 24, respectively. Can be blocked. The number of the second switches 27 may be an arbitrary number. When the electric wires 25 include a plurality of electric wires 25A and 25B, the second switch 27 may be provided for each of the plurality of electric wires.

The first switch 26 and the second switch 27 may be configured to be able to be repeatedly opened and closed. The first switch 26 and the second switch 27 may include arbitrary switching elements such as transistors or MOSFETs, for example. In such a case, the first switch 26 and the second switch 27 can be repeatedly opened and closed without the user's work by controlling these switching elements. Thereby, the convenience of the user of power storage device 20 is improved. On the other hand, the first switch 26 and the second switch 27 may be configured to irreversibly transition from a closed state to an open state. According to such a configuration, the first switch 26 and the second switch 27 cannot be returned to the closed state once opened. The first switch 26 and the second switch 27 may include an element such as a fuse, for example. In such a case, the first switch 26 and the second switch 27 cannot be closed when an element such as a fuse is blown. Therefore, the power storage device 20 can be used again, for example, by replacing the switch itself or replacing an element such as a fuse by a user or the like. Thereby, the opportunity of confirming the safety | security of the electrical storage apparatus 20 may be given with respect to a user before closing the switch once opened. The first switch 26 and the second switch 27 may have any configuration and any number of times that can be opened and closed depending on the application of the power storage device 20.

The communication unit 28 communicates with other devices based on the control of the control unit 21. The communication unit 28 may include, for example, a CAN (Controller Area Network) communication module, a wired LAN communication module, or a wireless LAN (Local Area Network) communication module. In FIG. 1, the communication unit 28 of the power storage device 20 </ b> A is connected to a common communication line 50 together with the power conditioner 10 and the power storage devices 20 </ b> B and 20 </ b> C included in the power storage system 1. Thereby, 20 A of electrical storage apparatuses can operate | move based on the received control signal, for example, receiving the control signal which controls an apparatus from the other apparatus contained in the electrical storage system 1. FIG. The control signal includes a signal for starting an operation such as charging / discharging of the power storage device, a signal for stopping the operation, a signal for restarting the operation, and the like, but is not limited thereto. In addition, the power storage device 20 </ b> A can transmit and receive a signal indicating an abnormal operation of the device to and from other devices included in the power storage system 1. In these signals, for example, information for identifying a device such as a signal transmission source device, a signal transmission destination device, or a device in which an operation abnormality has occurred may be set. For example, the device connected to the communication line 50 including the power storage device 20 may be previously assigned an identifier (ID) for uniquely identifying the device when performing communication. In such a case, the signal may include an ID as information for specifying the above-described device.

The storage unit 29 includes, for example, a semiconductor memory, a magnetic memory, an optical memory, or the like. The storage unit 29 may function as, for example, a main storage device or an auxiliary storage device. The storage unit 29 may be a cache memory of a processor included in the control unit 21. The storage unit 29 may be a volatile storage device or a non-volatile storage device. The storage unit 29 stores information and programs used for control and processing for realizing each function of the power storage device 20. The storage unit 29 may store, for example, information for uniquely specifying the first device connected to the first terminal unit 23 and the second device connected to the second terminal unit 24. . For example, the above-described ID or the like may be included in the information for uniquely identifying the device. In addition, the storage unit 29 may store a condition used for determining whether or not an operation abnormality of the device described later has occurred. At least a part of the information and programs stored in the storage unit 29 may be shared or synchronized with other devices.

The notification unit 30 notifies information by sound, vibration, light lighting, images, and the like. For example, the notification unit 30 includes at least one of a speaker, a vibrator, a light, a display device, and the like. The display device can be, for example, a liquid crystal display or an organic EL display. The notification unit 30 is based on the control of the control unit 21, the ID of the power storage device 20, the information on the remaining amount of power stored in the power storage device 20, and the open / close state of the first switch 26 or the second switch 27. Alternatively, at least one of information on whether or not an abnormal operation of the power storage device 20 has occurred may be notified.

The input unit 31 receives an input operation from the user. The input unit 31 may include, for example, an input device such as a touch panel, a keyboard, a mouse, a camera, or a microphone that is provided integrally with the display device of the notification unit 30. When the input unit 31 detects a user operation, the input unit 31 transmits the user operation to the control unit 21 as electronic information. At least one of the notification unit 30 and the input unit 31 may be provided in, for example, a remote control, a tablet terminal, a personal computer, or a control device that is physically separated from the power storage device 20.

Hereinafter, control of each function of the power storage device 20 by the control unit 21 will be described. When the control unit 21 detects an abnormal operation of the second device, the control unit 21 opens the first switch 26 with the second switch 27 closed, and the first terminal unit 23, the power storage unit 22, Is connected to the first terminal portion 23, the power storage portion 22, and the second terminal portion 24. For example, the control unit 21 of the power storage device 20A opens the first switch 26 when detecting an operation abnormality of the power storage device 20B that is the second device. Accordingly, the control unit 21 energizes between the first terminal unit 23 and the power storage unit 22 and the second terminal unit 24 in a state where the first terminal unit 23 and the power storage unit 22 are connected to be energized. Shut off. On the other hand, the control unit 21 of the power storage device 20A does not open the first switch 26 when detecting an operation abnormality of a device other than the power storage device 20B, for example, the power conditioner 10 or the power storage device 20C.

The control unit 21 may detect an abnormal operation of the second device by any method. The control unit 21 may detect an operation abnormality of the second device by a method or a combination of methods exemplified below. For example, the control unit 21 may detect the operation abnormality of the second device by receiving a signal indicating the operation abnormality of the second device in the communication unit 28. The signal indicating the abnormal operation of the second device may include information identifying the device, such as a device ID. The control unit 21 compares the ID of the second device stored in the storage unit 29 with the ID of the device included in the signal indicating the operation abnormality of the second device. It may be determined whether or not a signal indicating is received.

The signal indicating an abnormal operation of the second device may be a signal transmitted when an abnormal operation of the second device occurs. The signal may be transmitted when, for example, abnormal heat generation is detected in the second device, when an abnormal current amount is detected, or when an abnormal voltage increase or decrease is detected. . Further, the signal indicating the abnormal operation of the second device may be a signal transmitted other than when the abnormal operation of the second device occurs. For example, as a signal indicating an abnormal operation of the second device, a signal for notifying the operation state of the device, which is periodically transmitted regardless of the abnormality or the normal time, may be used. The control unit 21 may determine that the signal indicating the operation abnormality of the second device has been received based on the information included in the signal notifying the operation state of the second device. For example, when the second device is a power storage device, the signal may include information such as the temperature, current amount, or voltage value of the power storage device. When the value such as the temperature, the current amount, or the voltage value included in the signal that notifies the operation state of the power storage device that is the second device exceeds a predetermined threshold, the control unit 21 operates abnormally. It may be determined that a signal indicating is received. The signal indicating the abnormal operation of the second device may be transmitted from any device. For example, a signal indicating an abnormal operation of the second device may be transmitted directly from the second device itself, or may be transmitted from a device other than the second device such as the power conditioner 10.

The control unit 21 may detect an abnormal operation of the second device due to the communication unit 28 having lost communication with the second device. For example, the power storage device 20 may periodically communicate with other devices connected to the communication line 50 during normal operation. The communication may be transmission / reception of a signal for notifying the operation state of the device described above. Alternatively, the communication may be a so-called heartbeat, which is a transmission / reception of a signal that is periodically transmitted in order to confirm that the devices connected via the network are effective in mutual connection. The control unit 21 may determine that communication with the second device is interrupted when reception of a signal from the second device fails. In this determination, the control unit 21 repeats a condition that the predetermined period has elapsed without receiving a signal from the second device, or a predetermined number of transmission requests from the own device, and then from the second device. The determination may be made using a condition that the signal cannot be received.

The control unit 21 may detect the operation abnormality of the second device when information indicating the operation abnormality of the second device is detected in the sensor of the own device. Therefore, the power storage device 20 may include a sensor such as a temperature sensor, an ammeter, or a voltmeter.

The control unit 21 can operate the power storage device 20 with the first switch 26 opened. For example, in FIG. 1, when the first switches 26 of the power storage devices 20A, 20B, and 20C are closed, the power storage system 1 includes three power storage devices 20A, 20B, and 20C connected in parallel. It can operate as a storage system. On the other hand, when the first switch 26 of the power storage device 20B is opened, the power storage devices 20A and 20B and the power storage device 20C are not energized, so the power storage system 1 includes only the power storage devices 20A and 20B in parallel. It can operate as a power storage system connected to. Further, when the first switch 26 of the power storage device 20A is opened, the energization between the power storage device 20A and the power storage device 20B is interrupted. When energization between power storage device 20A and power storage device 20B is interrupted, energization between power storage device 20A and all the power storage devices connected lower than power storage device 20B is also interrupted. For this reason, power storage system 1 can operate as a power storage system to which only power storage device 20A is connected.

When the control unit 21 detects an operation abnormality of the own device, the control unit 21 transmits a signal indicating the operation abnormality of the own device from the communication unit 28. The signal indicating the operation abnormality of the own device may include information identifying the device in which the operation abnormality has occurred, such as the ID of the own device. Moreover, the control part 21 may transmit the said signal by arbitrary methods. For example, the control unit 21 may transmit a signal to all devices connected to the communication line 50 without specifying a device to be transmitted. In addition, the control unit 21 may designate a transmission target using the above-described ID or the like and transmit a signal to a specific device. Further, the signal may be directly transmitted from the communication unit 28 to another device. Alternatively, the signal may be transmitted once to a control device that controls the entire power storage system 1, for example, the power conditioner 10, and further transmitted from the control device to another power storage device 20 included in the power storage system 1. Good.

The control unit 21 may detect an abnormal operation of the own device by any method. The control unit 21 may detect the operation abnormality of the own device when information indicating the operation abnormality of the own device is detected in the sensor of the own device. Therefore, the power storage device 20 may include a sensor such as a temperature sensor, an ammeter, or a voltmeter. In addition, the control unit 21 detects an operation abnormality of any of the functional units included in the power storage device 20 described above, or the control unit 21 becomes unable to control any of the functional units. May be detected.

When the control unit 21 detects an operation abnormality of the device itself, the control unit 21 opens the second switch 27 with the first switch 26 closed, and the first terminal unit 23 and the second terminal unit 24. May be interrupted between the first terminal portion 23 and the second terminal portion 24 and the power storage unit 22. As a result, the control unit 21 maintains its power supply between the first device connected to the first terminal unit 23 and the second device connected to the second terminal unit 24 in its own device. Only the power storage unit 22 can be cut off. This process may be performed alternatively to the process of transmitting a signal indicating an abnormal operation of the own apparatus from the communication unit 28 described above. For example, when an operation abnormality of the own device is detected, the control unit 21 transmits a signal indicating the operation abnormality of the own device from the communication unit 28 according to the content of the operation abnormality, and sends the own device to another device. It may be determined whether to disconnect or to open the second switch 27 to disconnect itself from other devices. For example, if the control unit 21 determines that the operation abnormality of the own device does not affect the safety of the operation of the other power storage device unless charging / discharging by the power storage unit 22 of the own device is performed, The switch 27 may be opened.

For example, in FIG. 1, when the first switches 26 of the power storage devices 20A, 20B, and 20C are closed, the power storage system 1 includes three power storage devices 20A, 20B, and 20C connected in parallel. It can operate as a storage system. Thereafter, control unit 21 of power storage device 20B opens second switch 27 when an operation abnormality of power storage device 20B is detected. As a result, the control unit 21 of the power storage device 20B connects the first terminal unit 23 and the second terminal unit 24 to the power storage unit in a state where the first terminal unit 23 and the second terminal unit 24 are connected so as to be energized. The power supply to the part 22 is cut off. In such a case, energization between power storage devices 20A and 20C and power storage device 20B is interrupted while power supply between power storage devices 20A and 20C is maintained. Therefore, power storage system 1 can operate as a power storage system in which only power storage devices 20A and 20C are connected in parallel.

When the first switch 26 of the own device is opened, the control unit 21 may notify the notification unit 30 that the first switch 26 has been opened. In such a case, the user who sees the notified information can determine that the operation of the power storage system 1 using the power storage device and the device installed in the higher rank can be continued. In addition, the user can determine that an operation abnormality has occurred in a device installed below the power storage device. Further, when the first switch 26 of the own device is opened, the control unit 21 stops at least a part of the operation of the own device, and notifies the fact that the first switch 26 is opened. You may notify from. At least a part of the operation of the own device to be stopped may include, for example, charging and discharging of the power storage unit 22. After that, for example, a user who desires to continue the operation of the power storage device 20 performs an operation of inputting an instruction to resume at least a part of the operation with the first switch 26 opened. When the control unit 21 receives an instruction to restart at least a part of the operation with the first switch 26 opened, the input unit 31 receives at least the operation with the first switch 26 opened. Some may be resumed.

In the present disclosure, some or all of the functions of the power storage device 20 including the control unit 21 described above may be provided by a control device that controls the power storage device 20. The control device may be included in power storage device 20 or may be provided separately from power storage device 20. When provided separately, the control device is, for example, a home energy management system (HEMS), a battery management system (BMS), a remote control, a mobile phone, a smartphone, a tablet terminal, or a PC (Personal computer). ) And the like, an information processing device that can control the power storage device 20 may be used. The control device may be the above-described power conditioner 10 or another power storage device 20.

For example, the control device may include the notification unit 30 and the input unit 31 described above. In that case, the control device may notify from its notification unit 30 that the first switch 26 of the power storage device 20 has been opened. Therefore, the control unit 21 of the power storage device 20 may transmit a signal notifying that the first switch 26 is opened from the communication unit 28 to the control device. In such a case, the control device that has received the signal can determine that the operation of the power storage system 1 using the power storage device 20 and a device installed in a higher rank thereof can be continued. In addition, the control device may accept an instruction to restart at least a part of the operation of the power storage device 20 with the input unit 31 in a state where the first switch 26 of the power storage device 20 is opened. Thereafter, the control device may transmit a signal for resuming at least a part of the operation of the power storage device 20 to the power storage device 20 in a state where the first switch 26 of the power storage device 20 is opened. The control unit 21 of the power storage device 20 sends a signal transmitted from the control device to the communication unit 28 to restart at least a part of the operation of the power storage device 20 with the first switch 26 of the power storage device 20 opened. Receive.

(Operation example 1 of power storage system)
With reference to FIG.1 and FIG.2, an example of control of the electrical storage apparatus 20 which the electrical storage system 1 which concerns on one Embodiment of this indication performs is demonstrated. The power storage system 1 shown in FIG. 1 includes devices such as a power conditioner 10 and power storage devices 20A, 20B, and 20C. In the power storage system 1, the power storage devices 20A, 20B, and 20C are connected in parallel. Each power storage device 20 obtains an ID of its own device for performing communication via the communication line 50 and an ID of a device connected to each of the first terminal unit 23 and the second terminal unit 24 of the own device. Remember. The IDs of the power conditioner 10 and the power storage devices 20A, 20B, and 20C are ID10, ID20A, ID20B, and ID20C, respectively. In the power storage system 1, the power conditioner 10 is used as a control device for the power storage devices 20A, 20B, and 20C. Therefore, it is assumed that the user of the power storage system 1 can operate the devices included in the power storage system 1 using the remote controller of the power conditioner 10. Hereinafter, the power storage device 20 will be described assuming that this operation is started in a state where the first switch 26 and the second switch 27 are closed.

Referring to FIG. 2, when the user performs an operation for causing power storage system 1 to start operation with a remote controller, a signal for starting the operation is transmitted from power conditioner 10 to power storage devices 20A, 20B, and 20C. When power storage devices 20A, 20B, and 20C receive an instruction to start operation, power storage devices 20A, 20B, and 20C start operations including charging / discharging of power storage unit 22 according to the instructions. During the operation of the power storage system 1, the power storage devices 20A, 20B, and 20C monitor whether or not an operation abnormality of the own device or another device is detected. For example, when an operation abnormality occurs in the power storage device 20 </ b> B, the power storage device 20 </ b> B transmits a signal indicating the operation abnormality of the own device via the communication line 50 to the power conditioner 10 that is another device connected to the communication line 50. And transmitted to the power storage devices 20A and 20C. The other device detects an abnormal operation of the power storage device 20B by receiving the signal. Thereafter, the power storage device 20B stops charging / discharging of the power storage device 20B when it can be stopped.

The power storage devices 20A and 20C determine whether or not the power storage device 20B is a second device connected to the second terminal unit 24 of the own device when detecting an abnormal operation of the power storage device 20B. The power storage device 20A opens the first switch 26 of the own device because the power storage device 20B is a second device connected to the second terminal portion 24 of the own device. On the other hand, the power storage device 20C does not open the first switch 26 of the own device because the power storage device 20C is not the second device connected to the second terminal portion 24 of the own device. As a result, in the power storage system 1, the power storage device connected to the lower level than the power storage device 20A is disconnected. For this reason, the power storage system 1 can be operated in a degenerated state in which only the power storage device 20A is connected. The power storage device 20A displays on the display of its own device that the first switch 26 of its own device has been opened. For safety, each of the power storage devices 20 included in the power storage system 1 stops charging / discharging by the power storage unit 22 when an operation abnormality of the power storage device 20B is detected.

The user examines whether or not to resume the operation of the power storage system 1 for only the power storage device 20A based on the information displayed on the display of the power storage device 20A. Thereafter, the user inputs an instruction to restart charging / discharging by the power storage unit 22 on the touch panel of the power storage device 20A. When power storage device 20A receives an instruction to resume charging / discharging, power storage device 22A resumes charging / discharging by power storage unit 22 with first switch 26 of power storage device 20A being opened.

(Operation example 2 of power storage system)
With reference to FIG.1 and FIG.3, the other example of control of the electrical storage apparatus 20 which the electrical storage system 1 which concerns on one Embodiment of this indication performs is demonstrated. In the operation example 1, the control of the power storage device 20 when the power storage system 1 detects an operation abnormality of another power storage device has been described. In this operation example, the control of the power storage device 20 when an abnormal operation of the own device is detected in the power storage system 1 will be described. Hereinafter, the power storage device 20 will be described assuming that this operation is started in a state where the first switch 26 and the second switch 27 are closed.

Referring to FIG. 3, for example, it is assumed that an abnormal operation of the own device is detected in power storage device 20B. When the second switch 27 of the power storage device 20 </ b> B can be controlled, the power storage device 20 </ b> B opens the second switch 27 of the self device, and the first terminal unit 23, the second terminal unit 24, Is connected in a state where electricity can be passed, the power storage unit 22 is disconnected. Thereafter, the power storage device 20B stops charging / discharging of the power storage device 20B when it can be stopped. Accordingly, in the power storage system 1, the power storage devices 20A and 20C connected to the first terminal unit 23 and the second terminal unit 24 of the power storage device 20B are connected to be energized, and the power storage device Only charging / discharging of the power storage unit 22 of 20B is not performed. For this reason, the power storage system 1 can be operated in a degenerated state in which only the power storage devices 20A and 20C are connected in parallel.

Similarly to Operation Example 1, each of the power storage devices 20 included in the power storage system 1 stops charging / discharging by the power storage unit 22 for safety. When the power storage devices 20A and 20C receive an instruction to restart the operation of the power storage system 1 by the user, the power storage devices 20A and 20C restart charging / discharging by the respective power storage units 22.

(Processing example 1 of power storage device)
With reference to FIG. 4, an example of a process executed by the power storage device 20 that is the power storage device according to an embodiment of the present disclosure will be described. In this processing example, a process executed by the power storage device 20 when an operation abnormality of another device is detected will be described. Hereinafter, the power storage device 20 will be described as operating in a state in which the first switch 26 and the second switch 27 are closed.

Step S101: The control unit 21 detects an abnormal operation of the second device.

Step S102: The control unit 21 opens the first switch 26 and connects the first terminal unit 23 and the power storage unit 22 with the first terminal unit 23 and the power storage unit 22 in a state where the first terminal unit 23 and the power storage unit 22 can be energized. The current supply between the two terminal portions 24 is cut off.

Step S103: The control unit 21 stops at least a part of the operation of the own device.

Step S104: The control unit 21 notifies the notification unit 30 that the first switch 26 has been opened.

Step S105: The control unit 21 determines whether or not the input unit 31 has received an instruction to resume at least a part of the operation of the own device with the first switch 26 opened. When the control unit 21 does not accept the instruction (step S105—No), the control unit 21 repeats this step.

Step S106: When the control unit 21 receives a signal for resuming at least a part of the operation with the first switch 26 opened (Yes in Step S105), the first switch 26 is opened. Resume at least part of the operation

(Processing example 2 of power storage device)
With reference to FIG. 5, another example of the process executed by the power storage device 20 that is the power storage device according to the embodiment of the present disclosure will be described. In this processing example, a process executed by the power storage device 20 when an operation abnormality of the own device is detected will be described. Hereinafter, the power storage device 20 will be described as operating in a state in which the first switch 26 and the second switch 27 are closed.

Step S111: The control unit 21 detects an abnormal operation of the own device.

Step S112: The control unit 21 determines whether or not the second switch 27 can be controlled.

Step S113: When the second switch 27 is controllable (step S112—Yes), the control unit 21 opens the second switch 27, and the first terminal unit 23, the second terminal unit 24, Are connected to each other so as to be energized, and the power supply between the first terminal portion 23 and the second terminal portion 24 and the power storage unit 22 is cut off.

Step S114: When the second switch 27 is not controllable (step S112-No), the control unit 21 transmits a signal indicating an operation abnormality of the own device from the communication unit 28.

Step S115: The control unit 21 stops at least a part of the operation of the own device.

(Example of storage system processing)
With reference to FIG. 6, an example of the process which the electrical storage system 1 which concerns on one Embodiment of this indication performs is demonstrated. The power storage system 1 shown in FIG. 1 includes a power conditioner 10 and power storage devices 20A, 20B, and 20C that are power storage devices. In the power storage system 1, the power conditioner 10 is used as a control device for the power storage device 20. Hereinafter, the power storage device 20 will be described assuming that the operation starts with the first switch 26 and the second switch 27 closed based on a remote control operation of the power conditioner 10 by the user.

Step S201: When receiving the user operation for starting the operation of the power storage system 1, the power conditioner 10 transmits a signal for starting the operation to the power storage devices 20A, 20B, and 20C. The power storage devices 20A, 20B, and 20C start operating based on the signals.

Step S202: It is assumed that an abnormal operation occurs in the power storage device 20C during the operation of the power storage devices 20A, 20B, and 20C. When the power storage device 20B detects an operation abnormality of the self device, the power storage device 20B transmits a signal indicating the operation abnormality of the self device from the communication unit 28 to the power conditioner 10 and the power storage devices 20A and 20C.

Step S203: When the power storage device 20A detects an abnormal operation of the power storage device 20C, the power storage device 20C is not the second device, and therefore, for example, charging / discharging the power storage unit 22 without opening the first switch 26 For example, at least a part of the operation of the device itself is stopped.

Step S204: When the power storage device 20B detects an abnormal operation of the power storage device 20C, the power storage device 20C is the second device, so the first switch 26 is opened and the first terminal unit 23 and the power storage device 20B are stored. In a state in which the unit 33 is connected to be energized, the energization between the first terminal unit 23 and the power storage unit 22 and the second terminal unit 24 is interrupted. Thus, the power storage device 20B and the power storage device 20C are disconnected from each other in a state where the power storage device 20A and the power storage device 20B are connected to be energized.

Step S205: The power storage device 20B stops at least a part of the operation of the power storage device 22 such as charging / discharging of the power storage unit 22, for example.

Step S206: The power storage device 20B transmits a signal notifying that the first switch 26 of its own device has been opened from the communication unit 28 to the power conditioner 10.

Step S207: The power conditioner 10 displays on the remote controller or the like that the switch of the power storage device 20B has been opened.

Step S208: When receiving the user operation for resuming the operation of the power storage system 1, the power conditioner 10 transmits a signal for resuming at least a part of the operation to the power storage devices 20A and 20B.

Step S209: The power storage devices 20A and 20B restart at least a part of the operation based on the signal. As a result, the power storage system 1 resumes operation in the degenerated state.

Step S210: When the user repairs the power storage device 20C, when receiving a user operation for stopping the operation of the power storage system 1, the power conditioner 10 transmits a signal for stopping the operation to the power storage devices 20A, 20B, and 20C. To do. The power storage devices 20A, 20B, and 20C stop operating based on the signal. Thereafter, the user repairs the power storage device 20C.

Step S211: After the repair of the power storage device 20C by the user is completed, when the power conditioner 10 receives a user operation for starting the operation of the power storage system 1, the power conditioner 10 sends a signal for starting the operation to the power storage devices 20A, 20B, and 20C. Send. The power storage devices 20A, 20B, and 20C start operating based on the signals. Thereby, the electrical storage system 1 starts operation in a normal state.

As described above, according to the present embodiment, the power storage device 20 includes the first terminal unit 23 connected to the first device so as to be energized and the second terminal connected to the second device so as to be energized. Terminal portion 24, power storage portion 22, first terminal portion 23, second terminal portion 24, and electric wire 25 that connects power storage portion 22 to be energized, and first switch 26 provided in electric wire 25. And a control unit 21. When the control unit 21 detects an abnormal operation of the second device, the first switch 26 is opened and the first terminal unit 23 and the power storage unit 22 are connected to be energized in the first state. The terminal portion 23 and the power storage portion 22 and the second terminal portion 24 are cut off from energization. According to such a configuration, the power storage device 20 can automatically disconnect other devices connected to a lower level than the own device. Thereby, the power storage system 1 including the power storage device 20 can continuously operate some power storage devices that can operate normally. Thereby, the usefulness of the technique which controls an electrical storage apparatus improves.

According to the present embodiment, the power storage device 20 further includes the communication unit 28. The control unit 21 detects an operation abnormality of the second device by receiving a signal indicating an operation abnormality of the second device in the communication unit 28. According to such a configuration, the power storage device 20 detects an operation abnormality of the second device based on a signal transmitted from another device even when the operation error of the second device cannot be specified by the own device. Can do. Thereby, the usefulness of the technique which controls an electrical storage apparatus improves.

According to the present embodiment, the control unit 21 of the power storage device transmits a signal indicating the operation abnormality of the own device from the communication unit 28 when the operation abnormality of the own device is detected. According to this configuration, the power storage device 20 can cause the other device connected higher than the own device to disconnect the own device when an operation abnormality occurs in the own device. Thereby, the power storage system 1 including the power storage device 20 can continuously operate some power storage devices that can operate normally. Thereby, the usefulness of the technique which controls an electrical storage apparatus improves.

According to the present embodiment, the power storage device 20 further includes the second switch 27. When the control unit 21 detects an operation abnormality of its own device, the control unit 21 opens the second switch 27 and connects the first terminal unit 23 and the second terminal unit 24 so that energization is possible. The energization between the first terminal portion 23 and the second terminal portion 24 and the power storage unit 22 is cut off. According to such a configuration, the power storage device 20 has its own power storage unit 22 in a state in which energization of other devices connected to the upper and lower levels of the own device is maintained when an operation abnormality occurs in the own device. Can be separated. Thereby, the power storage system 1 including the power storage device 20 can continuously operate some power storage devices that can operate normally. Thereby, the usefulness of the technique which controls an electrical storage apparatus improves.

According to the present embodiment, the power storage device 20 further includes the notification unit 30. When the first switch 26 of the own device is opened, the control unit 21 notifies the notification unit 30 that the first switch 26 has been opened. According to such a configuration, the power storage device 20 can notify the user that a device connected higher than the device itself can operate normally. In addition, the power storage device 20 can notify the user that an abnormality has occurred in a device connected to a lower level of the own device. Thereby, the usefulness of the technique which controls an electrical storage apparatus improves.

According to the present embodiment, the power storage device 20 includes the input unit 31 in addition to the notification unit 30. When the first switch of the own device is opened, the control unit 21 stops at least a part of the operation of the own device and notifies the notification unit that the first switch 26 has been opened. . When the control unit 21 receives an instruction to restart at least a part of the operation with the first switch 26 opened, the input unit 31 receives at least the operation with the first switch 26 opened. Resume part. According to this configuration, the power storage device 20 stops the operation of the own device when an operation abnormality occurs in the second device, and asks the user to determine whether the operation of the own device needs to be continued. Thus, the operation of the own device can be resumed. Thereby, since the user is given an opportunity to determine whether or not the power storage system 1 is continuously operated when an operation abnormality occurs in the second device, the usefulness of the technology for controlling the power storage device is improved. To do.

According to the present embodiment, when the first switch 26 of the own device is opened from the communication unit 28, the control unit 21 of the power storage device 20 sends a signal notifying that the first switch 26 has been opened. Send. According to this configuration, the power storage device 20 can notify other devices that a device connected to a higher rank than the self device in the power storage system 1 can operate normally. In addition, the power storage device 20 can notify other devices that an abnormality has occurred in a device connected to a lower level of the power storage device 20. Thereby, the usefulness of the technique which controls an electrical storage apparatus improves.

According to this embodiment, when the first switch 26 of the power storage device 20 is opened, the control unit 21 of the power storage device 20 stops at least a part of the operation of the device itself, and the first communication unit 28 starts the first operation. A signal notifying that the switch 26 is opened is transmitted. When the communication unit 28 receives a signal for resuming at least a part of the operation with the first switch 26 opened, the control unit 21 receives at least the operation with the first switch 26 opened. Resume part. According to this configuration, the power storage device 20 stops the operation of the own device when an operation abnormality occurs in the second device, and determines whether or not the operation of the own device needs to be continued by the device that can be operated by the user. After looking up, the operation of the device can be resumed. Thereby, when an operation abnormality occurs in the second device, it is determined whether or not the power storage system 1 is to be continuously operated for other users who are remote from the power storage device 20 via another device. Therefore, the usefulness of the technology for controlling the power storage device is improved.

According to the present embodiment, the first switch 26 of the power storage device 20 makes an irreversible transition from the closed state to the opened state. According to this configuration, the power storage device 20 can operate with the first switch 26 of the power storage device 20 closed only when the first switch 26 or its components are replaced. This gives the user an opportunity to confirm the safety of the second device and the power storage device 20, thereby improving the usefulness of the technology for controlling the power storage device.

The above-described embodiment has been described as a representative example, but it will be apparent to those skilled in the art that many changes and substitutions can be made within the spirit and scope of the present disclosure. Accordingly, the present disclosure should not be construed as being limited by the above-described embodiments, and various modifications and changes can be made without departing from the scope of the claims. For example, functions and the like included in each means or each step can be rearranged so as not to be logically contradictory, and a plurality of means or steps can be combined into one or divided. .

For example, in the above-described embodiment, an example in which devices such as the power storage device 20 are connected in parallel in the power storage system 1 is shown, but this is not a limitation. Devices such as the power storage device 20 may be connected in series.

For example, in the above-described embodiment, the power storage device may be any device that can supply power to the outside. The power storage device may be any power supply device including, for example, a solar cell, a wind power generator, a hydroelectric generator, a fuel cell, and the like. In such a case, the power storage system described above may be a power supply system, and the power storage unit may be a power supply unit that generates power and supplies power.

For example, in the above-described embodiment, an example in which each device connected to the communication line 50 is assigned one ID for uniquely identifying the device is not limited to this. Each device may be provided with an ID group including a plurality of IDs. In such a case, the ID included in the ID group uniquely identifies the device and may include additional information regarding the device. The additional information regarding the device may be the operating state of the device. For example, the power storage device 20 uniquely identifies the power storage device 20, indicates that the own device is operating normally, and uniquely identifies the power storage device 20, indicating that the own device is abnormal in operation. An ID group including the ID shown may be given.

1 power storage system 10 power conditioner 20 power storage device 21 control unit 22 power storage unit 23 first terminal unit 24 second terminal unit 25 electric wire 26 first switch 27 second switch 28 communication unit 29 storage unit 30 notification Section 31 Input section 40 Electric wire 50 Communication line 60 Power system 70 Load

Claims (11)

1. A first terminal connected to the first device so as to be energized;
   A second terminal connected to the second device so as to be energized;
   A power storage unit;
   An electric wire that connects the first terminal portion, the second terminal portion, and the power storage portion so as to be energized;
   A first switch provided on the electric wire;
   A control unit;
   With
   When the control unit detects an abnormal operation of the second device, the control unit opens the first switch and connects the first terminal unit and the power storage unit so as to be energized. Cutting off energization between the first terminal unit and the power storage unit and the second terminal unit;
   Power storage device.
2. The power storage device according to claim 1,
   A communication unit;
   The control unit detects an operation abnormality of the second device by receiving a signal indicating an operation abnormality of the second device in the communication unit;
   Power storage device.
3. The power storage device according to claim 2,
   When the control unit detects an operation abnormality of the own device, the control unit transmits a signal indicating the operation abnormality of the own device from the communication unit.
   Power storage device.
4. The power storage device according to claim 1 or 2,
   A second switch provided on the electric wire;
   When the control unit detects an abnormal operation of its own device, the control unit opens the second switch and connects the first terminal unit and the second terminal unit so that energization is possible. Cutting off energization between the first terminal part and the second terminal part and the power storage part;
   Power storage device.
5. The power storage device according to any one of claims 1 to 4,
   Further comprising a notification unit;
   When the first switch of its own device is opened, the control unit notifies the notification unit that the first switch is opened.
   Power storage device.
6. The power storage device according to any one of claims 1 to 4,
   A notification unit and an input unit;
   The controller is
   When the first switch of the own device is opened, at least part of the operation of the own device is stopped, and the notification unit notifies that the first switch is opened,
   When the input unit receives an instruction to resume at least a part of the operation with the first switch opened, at least a part of the operation is performed with the first switch opened. To resume,
   Power storage device.
7. The power storage device according to claim 2 or 3,
   When the first switch of the device is opened from the communication unit, the control unit transmits a signal notifying that the first switch has been opened.
   Power storage device.
8. The power storage device according to claim 2 or 3,
   The controller is
   When the first switch of the own device is opened, at least a part of the operation of the own device is stopped, and a signal notifying that the first switch is opened is transmitted from the communication unit. ,
   When the communication unit receives a signal for resuming at least a part of the operation with the first switch opened, at least a part of the operation is performed with the first switch opened. To resume,
   Power storage device.
9. The power storage device according to any one of claims 1 to 8,
   The first switch irreversibly transitions from a closed state to an open state;
   Power storage device.
10. A first terminal connected to be energized with the first device, a second terminal connected to be energized with the second device, a power storage unit, the first terminal, and the second A control device capable of controlling a power storage device including a terminal unit and an electric wire connecting the power storage unit so as to be energized, and a first switch provided on the electric wire,
    Causing the power storage device to detect an abnormal operation of the second device;
    When an abnormal operation of the second device is detected in the power storage device, the first switch is opened, and the first terminal unit and the power storage unit are connected to be energized, Cutting off energization between the first terminal unit and the power storage unit and the second terminal unit;
    Control device.
11. A first terminal connected to be energized with the first device, a second terminal connected to be energized with the second device, a power storage unit, the first terminal, and the second A power storage device comprising: an electric wire connecting the terminal portion and the power storage portion so as to be energized; and a first switch provided on the electric wire,
    Detecting an operation abnormality of the second device;
    The first terminal unit is opened in a state where the first switch is opened and the first terminal unit and the power storage unit are connected to be energized when an operation abnormality of the second device is detected. And cutting off the energization between the power storage unit and the second terminal unit,
    Including a control method.
    

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