Charge / discharge system, control device, control method, and program

Abstract

The device must be able to discharge power from the mobile unit's battery even if the power supply from the grid is interrupted while the control device has stopped sequence processing with the mobile unit. [Solution] The charge / discharge system A1 comprises a charge / discharge device 1 and a control device 2. The charge / discharge device 1 exchanges power between the battery 101 of the mobile body 100 and at least one of the grid power supply 90 and the load 81. The control device 2 performs sequence processing with the mobile body 100 and controls the charge / discharge device 1. If the power supply from the grid power supply 90 is stopped while the sequence processing has been stopped after the exchange of power between the mobile body 100 and the charge / discharge device 1 has been permitted in the sequence processing, the control device 2 receives power from an auxiliary power supply PS1 different from the grid power supply 90 and restarts the sequence processing. The control device 2 performs power outage power supply processing to start power supply from the battery 101.

Description

Technical Field

[0001] The present disclosure generally relates to a charge-discharge system, a control device, a control method, and a program. More specifically, the present disclosure relates to a charge-discharge system for charging and discharging a battery of a moving object, a control device, a control method of the control device, and a program.

Background Art

[0002] An example is given of the charge-discharge device (charge-discharge system) described in Patent Document 1. The charge-discharge device described in Patent Document 1 is connected to an electric vehicle via a charge-discharge connector of a charge-discharge cable. The electric vehicle has a battery and a vehicle control unit. Further, the charge-discharge device described in Patent Document 1 charges and discharges the battery of the electric vehicle.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The charge-discharge device (control device) performs communication (sequence processing) with an electric vehicle (moving object) and performs charge-discharge control based on the battery information received from the electric vehicle. When the charge-discharge device stops communicating with the electric vehicle while being connected to the electric vehicle via a charge-discharge cable and a power outage occurs in the commercial power system (system power supply), the charge-discharge device cannot receive power supply from the commercial power system and stops operating. Therefore, there is a problem that the charge-discharge device cannot perform communication (sequence processing) with the electric vehicle and cannot start discharging from the battery of the electric vehicle.

[0005] The purpose of this disclosure is to provide a charge / discharge system, control device, control method, and program that can discharge the battery of a mobile body even when the power supply from the grid is interrupted while the control device has stopped sequence processing with the mobile body. [Means for solving the problem]

[0006] A charge / discharge system according to one aspect of the present disclosure comprises a charge / discharge device and a control device. The charge / discharge device exchanges power between the battery of a mobile body having a battery and at least one of a grid power source and a load. The control device performs sequence processing with the mobile body and controls the charge / discharge device. If the power supply from the grid power source is stopped while the sequence processing has been stopped after the exchange of power between the mobile body and the charge / discharge device has been permitted in the sequence processing, the control device receives power from an auxiliary power source different from the grid power source and performs power supply processing during a power outage. The power supply processing during a power outage includes restarting the sequence processing and starting power supply from the battery.

[0007] A control device according to one aspect of the present disclosure is capable of controlling a charge / discharge device. The charge / discharge device exchanges power between the battery of a mobile body having a battery and at least one of a grid power source and a load. The control device performs sequence processing with the mobile body. If the power supply from the grid power source is stopped while the sequence processing has been stopped after the exchange of power between the mobile body and the charge / discharge device has been permitted in the sequence processing, the control device receives power from an auxiliary power source different from the grid power source and performs power supply processing during a power outage. Power supply processing during a power outage includes restarting the sequence processing and starting power supply from the battery.

[0008] One aspect of the present disclosure is a control method for a control device capable of controlling a charge / discharge device. The charge / discharge device exchanges power between the battery of a mobile body having a battery and at least one of a grid power source and a load. The control device performs sequence processing with the mobile body. If the power supply from the grid power source is stopped while the sequence processing has been stopped after the exchange of power between the mobile body and the charge / discharge device has been permitted in the sequence processing, the control device receives power from an auxiliary power source different from the grid power source and performs power supply processing during a power outage. The power supply processing during a power outage includes restarting the sequence processing and starting power supply from the battery.

[0009] A program according to one aspect of this disclosure is a program that causes one or more processors to execute the control method. [Effects of the Invention]

[0010] According to this disclosure, even if the power supply from the grid is interrupted while the control device has stopped sequence processing with the mobile unit, it is possible to discharge from the mobile unit's battery. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 is a block diagram of the charge / discharge system according to this embodiment. [Figure 2] Figure 2 is a schematic diagram of the remote control for the charging and discharging system described above. [Figure 3] Figure 3 is a graph showing the changes in charging power and discharging power for the same charging and discharging system. [Figure 4] Figure 4 is an explanatory diagram illustrating the number of times the sequence processing is stopped in the same charge / discharge system. [Figure 5] Figure 5 is a block diagram of a modified charge / discharge system according to this embodiment. [Modes for carrying out the invention]

[0012] Hereinafter, the charge-discharge system according to the embodiment will be described with reference to the drawings. Note that the configurations described in the following embodiments are merely examples of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications can be made according to the design and the like as long as the effects of the present disclosure can be achieved.

[0013] (Embodiment) Hereinafter, the charge-discharge system A1 according to the embodiment will be described with reference to FIGS. 1 to 4.

[0014] <Overview> FIG. 1 is a schematic system configuration diagram of the charge-discharge system A1 according to the present embodiment.

[0015] The charge-discharge system A1 includes, for example, a charge-discharge device 1 and a control device 2.

[0016] The charge-discharge device 1 exchanges electric power between the storage battery 101 of the moving body 100 having the storage battery 101 and at least one of the grid power supply 90 and the load 81.

[0017] The control device 2 of the present embodiment can control the charge-discharge device 1 that exchanges electric power between the storage battery 101 of the moving body 100 having the storage battery 101 and at least one of the grid power supply 90 and the load 81.

[0018] The control device 2 performs sequence processing with the moving body 100 and controls the charge-discharge device 1.

[0019] If the power supply from the grid power source 90 is interrupted while the control device 2 has stopped sequence processing after permission has been granted for the transfer of power between the mobile unit 100 and the charge / discharge device 1 in sequence processing, the control device 2 receives power from an auxiliary power source PS1, which is different from the grid power source 90, and performs power outage power supply processing. The power outage power supply processing performed by the control device 2 includes restarting sequence processing and starting power supply from the storage battery 101. For example, after permission has been granted for the transfer of power between the mobile unit 100 and the charge / discharge device 1 in sequence processing, the control device 2 stops sequence processing if predetermined stop conditions (for example, the first stop condition and the second stop condition described later) set for purposes such as reducing the power consumption of the mobile unit 100 are met. Then, if the power supply from the grid power source 90 is interrupted while the control device 2 has stopped sequence processing, the control device 2 receives power from an auxiliary power source PS1, which is different from the grid power source 90, and performs power outage power supply processing.

[0020] Here, the mobile unit 100 has a battery 101 for supplying power to the drive motor. The mobile unit 100 is an electric vehicle that moves by driving the drive motor with the power stored in the battery 101. An electric vehicle is, for example, an electric vehicle (BEV: Battery Electronic Vehicle) or a plug-in hybrid vehicle (PHEV: Plug-in Hybrid Electronic Vehicle). In the following description, the battery 101 of the mobile unit 100 may be referred to as the first battery 101. In the following description, the battery 101 of the mobile unit 100 may be referred to as the first battery 101 in order to distinguish it from the second battery 4 connected to the control device 2. In Figure 1, the battery 101 is referred to as the first battery 101.

[0021] The charging and discharging device 1 is installed, for example, in a parking space of a facility used by the user of the moving body 100. The facility used by the user is, for example, a building for residential use such as a detached house or an apartment house. Note that the facility is not limited to a building for residential use, and may be a non-residential building such as an office building, a commercial facility, a supermarket, a store, a school facility, a hospital, etc. The parking space is a parking space provided outside or inside the facility (e.g., underground, etc.), and is a space for parking the moving body 100 charged by the charging and discharging system A1.

[0022] Note that there are multiple types of charging methods for the moving body 100. The charging and discharging system A1 of the present embodiment adopts, for example, a charging method conforming to the CHAdeMO (registered trademark) standard. Also, the moving body 100 and the charging and discharging system A1 of the present embodiment correspond to a V2H (Vehicle to Home) system capable of supplying power from the first battery 101 of the moving body 100 to the load 81 via the charging and discharging system A1. That is, the fact that the charging and discharging device 1 exchanges power between the first battery 101 of the moving body 100 and at least one of the system power source 90 and the load 81 means that the charging and discharging device 1 performs at least one of the charging operation and the discharging operation of the first battery 101. In the charging operation of the first battery 101, the charging and discharging device 1 charges the first battery 101 with the power supplied from the system power source 90. Also, in the discharging operation of the first battery 101, the charging and discharging device 1 supplies the power discharged from the first battery 101 to at least one of the system power source 90 and the load 81.

[0023] Also, the control device 2 performs sequence processing with the moving body 100 by communicating with the moving body 100. More specifically, the control device 2 performs sequence processing with the controller of the moving body 100. The controller of the moving body 100 is, for example, an ECU (Electronic Control Unit) or the like. The sequence processing is a process performed between the control device 2 and the moving body 100, and means a series of process groups including a plurality of processes in which the order for starting or stopping the power exchange between the moving body 100 and the charging and discharging device 1 is defined.

[0024] Furthermore, the auxiliary power supply PS1 is a power source different from the grid power supply 90. The auxiliary power supply PS1 is a power source that can supply power to the control device 2 when the power supply from the grid power supply 90 stops while the control device 2 has stopped sequence processing. The auxiliary power supply PS1 is, for example, a second battery 4 that is charged with power supplied from the grid power supply 90, but it may also be a distributed power source 30 installed in the facility. The distributed power source 30 is a power source installed in the facility or an area including the facility, and includes, for example, a solar cell module 30A and an energy storage device 10.

[0025] The control device 2 stops the sequence processing if, for example, after power transfer between the mobile body 100 and the charge / discharge device 1 is permitted during sequence processing, at least one of the first stop condition and the second stop condition is met. The first stop condition is that the period during which the power value of the charging power of the first battery 101 is less than or equal to the first threshold P1 is a predetermined period T1 or longer. The second stop condition is that the period during which the power value of the discharge power of the first battery 101 is less than or equal to the second threshold P2 is a predetermined period T2 or longer. In this case, if the power values ​​of the charging power and discharge power of the first battery 101 are small, the charging efficiency and discharge efficiency of the first battery 101 will deteriorate, and the power consumption of the mobile body 100 will increase. Therefore, the control device 2 stops the sequence processing if at least one of the first stop condition and the second stop condition is met, thereby suppressing the deterioration of the charging efficiency and discharge efficiency of the first battery 101. As a result, the power consumption of the mobile body 100 can be reduced in the charge / discharge system A1. The power value of the charging power of the battery 101 may be, for example, the instantaneous power value, or the amount of energy obtained by accumulating the charging power per unit time. The conditions under which the control device 2 stops sequence processing are not limited to the first and second stop conditions described above, and can be changed as appropriate.

[0026] Furthermore, if the power supply from the grid power supply 90 is interrupted while the control device 2 has stopped sequence processing, the control device 2 receives power from the auxiliary power supply PS1 and performs power supply processing during a power outage. Therefore, even if the power supply from the grid power supply 90 is interrupted, the control device 2 can receive power from the auxiliary power supply PS1 and restart sequence processing with the mobile body 100, and start supplying power from the battery 101. Thus, in the charge / discharge system A1 of this embodiment, even if the power supply from the grid power supply 90 is interrupted while the control device 2 has stopped sequence processing with the mobile body 100, the battery 101 of the mobile body 100 can be discharged.

[0027] <Details> The charging and discharging system A1 according to this embodiment will be described below with reference to Figures 1 to 4.

[0028] (1) Charging and discharging system The charge / discharge system A1 includes, for example, a charge / discharge device 1, a control device 2, an energy storage device 10, a power device 20, a solar cell module 30A, and a remote control 40, as shown in Figure 1.

[0029] The charge / discharge system A1 is electrically connected to, for example, the mobile body 100 and charges the battery (first battery) 101 of the mobile body 100. The mobile body 100 is, for example, an electric vehicle (e.g., an electric car) and has the first battery 101. The first battery 101 is, for example, a lithium-ion battery. The charge / discharge system A1 also discharges the first battery 101 and supplies the power stored in the first battery 101 to the energy storage device 10 and the load 81 connected to the distribution board 80 described later. In Figure 1, one load 81 is connected to the distribution board 80, but multiple loads 81 may be connected to the distribution board 80. Note that the first battery 101 is not limited to a lithium-ion battery, but may be, for example, a nickel-metal hydride battery, a lead-acid battery, etc.

[0030] (2) Each component of the charge / discharge system (2.1)Charge / discharge device The charge / discharge device 1 charges and discharges the first battery 101 of the mobile unit 100. The charge / discharge device 1 is electrically connected to the first battery 101. More specifically, the charge / discharge device 1 is connected to the mobile unit 100 via a charge / discharge cable CB1. The mobile unit 100 is provided with a first connector CN1, and a second connector CN2, provided on the charge / discharge cable CB1, is detachably attached to the first connector CN1. By connecting the second connector CN2 to the first connector CN1, the mobile unit 100 and the charge / discharge device 1 are electrically connected via the charge / discharge cable CB1. The charge / discharge cable CB1 includes a power line for power supply and a communication line for communication.

[0031] Furthermore, the charging / discharging device 1 is electrically connected to the energy storage device 10 and the power supply device 20.

[0032] As described above, the charge / discharge device 1 of this embodiment is connected to the mobile body 100 via a charge / discharge cable CB1 on which a second connector CN2 is attached to a first connector CN1 of the mobile body 100. Here, the second connector CN2 is provided with a locking part 7. The locking part 7 can be switched between a locked state and an unlocked state when the second connector CN2 is connected to the first connector CN1. The locked state is when the second connector CN2 cannot be removed from the first connector CN1. The unlocked state is when the second connector CN2 can be removed from the first connector CN1.

[0033] For example, when the second connector CN2 is connected to the first connector CN1, a latch on the second connector CN2 engages with a part of the first connector CN1, preventing the second connector CN2 from detaching from the first connector CN1. The second connector CN2 is provided with a release button or the like to release the latch state, but the locking unit 7 disables the operation of the release button, thereby locking the second connector CN2 so that it cannot be detached from the first connector CN1. The locking unit 7 also enables the operation of the release button, thereby unlocking the second connector CN2 so that it can be detached from the first connector CN1. The locking unit 7 switches between the locked state and the unlocked state in accordance with a control signal input from the control device 2.

[0034] (2.2) Control device The control device 2 is implemented, for example, by a computer system having one or more processors and one or more memories. In other words, the functions of the control device 2 are realized by one or more processors executing a program stored in memory. The program may be pre-stored in memory, provided via a telecommunication line such as the Internet, or provided on a non-temporary recording medium such as a memory card. The control device 2 is electrically connected to the charge / discharge device 1, the power device 20, and the energy storage device 10. The control device 2 is also electrically connected to the mobile body 100. Note that the control device 2 is not limited to being implemented by a computer having one or more processors and one or more memories; for example, it may be implemented by a processor composed of multiple components, or it may be implemented by a single processor in combination with other functions and configurations.

[0035] The control device 2 controls, for example, the charge / discharge device 1. More specifically, the control device 2 controls the charge / discharge device 1 so that it charges and discharges the first storage battery 101.

[0036] Furthermore, the control device 2 communicates with the mobile body 100 via the communication line of the charge / discharge cable CB1. The control device 2, for example, communicates with the mobile body 100 using CAN (Controller Area Network). The control device 2 also sends and receives signals containing information about the processing to be performed with the mobile body 100. The control device 2 also performs sequence processing with the mobile body 100. Sequence processing refers to processing performed between the control device 2 and the mobile body 100, and means a series of processes that include a defined sequence for starting or stopping the transfer of power between the mobile body 100 and the charge / discharge device 1.

[0037] The control device 2 controls the charge / discharge device 1 to charge and discharge the first battery 101 after the transfer of power between the mobile body 100 and the charge / discharge device 1 is permitted in the sequence processing.

[0038] Furthermore, the control device 2 communicates with the power device 20. The control device 2 sends and receives signals that include, for example, information about the charge / discharge device 1 (e.g., setting information).

[0039] Furthermore, the control device 2 controls, for example, the energy storage device 10. More specifically, the control device 2 controls, for example, the power conversion device 11 in the energy storage device 10, which will be described later. The control device 2 also controls the charge / discharge device 1 and the power conversion device 11 when power is exchanged between the first battery 101 and the energy storage unit 12 in the energy storage device 10, which will be described later. In other words, the control device 2 controls the charge / discharge device 1 and the power conversion device 11 when charging and discharging are performed between the first battery 101 and the energy storage unit 12.

[0040] The control device 2 operates using power supplied, for example, from the grid power supply 90 via the power switching unit 70 and the power device 20. Furthermore, if the power supply from the grid power supply 90 to the control device 2 is interrupted, the control device 2 operates using power supplied from the auxiliary power supply PS1.

[0041] The auxiliary power supply PS1 includes, for example, a second battery 4 provided in a housing 60 that houses the charge / discharge device 1 and the control device 2. The second battery 4 is, for example, a secondary battery such as a lithium-ion battery, a capacitor, or an electric double-layer capacitor. The housing 60 also houses a first power supply circuit 5 and a second power supply circuit 6 for charging the second battery 4. The first power supply circuit 5 converts AC power supplied from the grid power supply 90 via the power switching unit 70 into DC power to charge the second battery 4. The second power supply circuit 6 is connected, for example, via a third connector CN3 to the power supply terminal of the mobile unit 100 (for example, a cigarette lighter socket or USB outlet provided on the mobile unit 100). The second power supply circuit 6 converts the voltage value of the DC voltage supplied from the battery (not shown) of the mobile unit 100 via the third connector CN3 to charge the second battery 4.

[0042] In this embodiment, when the second connector CN2 of the charge / discharge cable CB1 is connected to the first connector CN1 of the mobile body 100, for example, if the first stop condition or the second stop condition is met, the control device 2 stops sequence processing with the mobile body 100. If the power supply from the grid power source 90 to the control device 2 is stopped while the control device 2 has stopped sequence processing with the mobile body 100, the control device 2 can receive power from the auxiliary power source PS1, restart sequence processing, and start supplying power from the first battery 101. Therefore, in the charge / discharge system A1 of this embodiment, even if the power supply from the grid power source 90 is stopped while the control device 2 has stopped sequence processing with the mobile body 100, the battery 101 of the mobile body 100 can be discharged.

[0043] Furthermore, the control device 2 switches the locking unit 7 to a locked or unlocked state by outputting a control signal to the locking unit 7 while the second connector CN2 is connected to the first connector CN1.

[0044] (2.3) Energy storage devices The energy storage device 10 is a device that stores electricity generated by a power generation device (in the example in Figure 1, a solar cell module 30A). The energy storage device 10 includes, for example, a power converter 11 and an energy storage unit 12. The energy storage unit 12 is, for example, a lithium-ion battery. However, the energy storage unit 12 is not limited to a lithium-ion battery, but may be, for example, a nickel-metal hydride battery, a lead-acid battery, etc.

[0045] The power converter 11 converts the first DC power into the second DC power. The power converter 11 converts the first DC power from at least one of the charge / discharge device 1 and the power device 20 into the second DC power and supplies the second DC power to the energy storage unit 12. The power converter 11 also converts the second DC power into the first DC power. The power converter 11 converts the second DC power from the energy storage unit 12 into the first DC power and supplies the first DC power to at least one of the charge / discharge device 1 and the power device 20. In short, the power converter 11 is a bidirectional converter (bidirectional DC-DC converter). The power converter 11 is electrically connected to the energy storage unit 12, the charge / discharge device 1 and the power device 20.

[0046] (2.4) Power equipment The power device 20 includes, for example, a first power converter 21, a second power converter 22, and a power control device 23.

[0047] The first power converter 21 converts the first DC power to the first AC power. The first power converter 21 converts the first DC power from at least one of the charge / discharge device 1 and the energy storage device 10 to the first AC power and supplies the first AC power to at least one of the distribution board 80 and the grid power supply 90. The first power converter 21 also converts the first AC power to the first DC power. The first power converter 21 converts the first AC power from at least one of the distribution board 80 and the grid power supply 90 to the first DC power and supplies the first DC power to at least one of the charge / discharge device 1 and the energy storage device 10. In short, the first power converter 21 is a bidirectional converter (bidirectional AC-DC converter). The first power converter 21 is electrically connected to the charge / discharge device 1, the power converter 11, and the second power converter 22. Furthermore, the first power converter 21 is electrically connected to the distribution board 80 via the power switching unit 70, which will be described later. Also, the first power converter 21 is electrically connected to the grid power supply 90 via the power switching unit 70.

[0048] The power switching unit 70 is a device that electrically connects the first power converter 21 to the distribution board 80 or the grid power supply 90. The power switching unit 70 switches to either a first connection state or a second connection state according to instructions from, for example, the power control device 23 of the power device 20. The first connection state is the connection state when the power device 20 operates in conjunction with the grid power supply 90 (grid-connected operation), and in the first connection state, the distribution board 80 is connected to the circuit that connects the grid-connected input / output terminals of the first power converter 21 to the grid power supply 90. The second connection state is the connection state when the power device 20 operates independently, and in the second connection state, the output on the independent operation side of the first power converter 21 is connected to the distribution board 80.

[0049] The distribution board 80 is electrically connected to the grid power supply 90 via the power switching unit 70. The distribution board 80 is also electrically connected to the first power converter 21 via the power switching unit 70. One or more loads 81 are connected to the distribution board 80. The loads 81 are, for example, electrical equipment such as lighting fixtures or air conditioning equipment, hot water supply equipment, outlets, wiring devices, etc. Wiring devices are, for example, wall switches.

[0050] The grid power supply 90 is, for example, a commercial power supply. The grid power supply 90 supplies second AC power to at least one of the power device 20 and the distribution board 80.

[0051] The second power converter 22 converts the third DC power to the first DC power. The second power converter 22 is a DC-DC converter. The second power converter 22 converts the third DC power from the solar cell module 30A, which is a distributed power source 30, to the first DC power and supplies the first DC power to at least one of the first power converter 21, the charge / discharge device 1, and the power converter 11. The second power converter 22 is electrically connected to the first power converter 21, the charge / discharge device 1, and the power converter 11. The second power converter 22 is also electrically connected to the solar cell module 30A.

[0052] The power control device 23 is implemented, for example, by a computer system having one or more processors and one or more memories. In other words, the functions of the power control device 23 are realized by one or more processors executing a program stored in memory. The program may be pre-stored in memory, provided via a telecommunication line such as the Internet, or provided on a non-temporary recording medium such as a memory card. The power control device 23 is electrically connected to the first power converter 21 and the second power converter 22. The power control device 23 is also electrically connected to the remote control 40, the control device 2, and the power switching unit 70.

[0053] The power control device 23 controls, for example, the first power converter 21 and the second power converter 22. The power control device 23 also accepts operations from the remote control 40. For example, the power control device 23 accepts changes to the settings of the charge / discharge device 1 from the remote control 40. When the power control device 23 accepts a change to the settings of the charge / discharge device 1 from the remote control 40, it transmits a signal containing information about the change to the settings of the charge / discharge device 1 to the control device 2. The power control device 23 accepts not only changes to the settings of the charge / discharge device 1 from the remote control 40, but also changes to the settings of the charge / discharge system A1 from the remote control 40.

[0054] (2.5) Solar cell modules In this embodiment, a solar cell module 30A is connected to the charge / discharge system A1 as a distributed power source 30. The solar cell module 30A includes, for example, multiple solar cells. The multiple solar cells generate electricity from sunlight. The multiple solar cells supply the generated electricity (third DC power) to the second power converter 22. In other words, the solar cell module 30A supplies third DC power to the second power converter 22. The solar cell module 30A is electrically connected to the second power converter 22. Note that although there are multiple solar cells, there may be only one.

[0055] (2.6) Remote control The remote control 40 is configured to change the settings of the charging and discharging system A1, for example. The remote control 40 has a display unit 41, an operation unit 42, and a control unit, as shown in Figure 2, for example.

[0056] The display unit 41 is, for example, a display (e.g., a liquid crystal display). The display unit 41 is electrically connected to the control unit. The display unit 41 displays information from the control unit. In the example in Figure 2, information (setting information) regarding the type (vehicle type) of the mobile unit 100 is displayed on the display unit 41.

[0057] The operation unit 42 is configured to allow, for example, the modification of information (e.g., setting information) displayed on the display unit 41. The operation unit 42 is, for example, an operation button. The operation unit 42 is electrically connected to the control unit.

[0058] The control unit transmits, for example, a signal containing information regarding setting changes to the power control device 23 of the power device 20. The control unit is implemented, for example, by a computer system having one or more processors and one or more memories. In other words, the functions of the control unit are realized by one or more processors executing a program stored in memory. The program may be pre-stored in memory, provided via a telecommunication line such as the Internet, or provided on a non-temporary recording medium such as a memory card.

[0059] The user can set whether or not the control device 2 will perform power supply processing during a power outage when the power supply from the grid power source 90 is interrupted while the control device 2 has stopped sequence processing, by operating the remote control 40. In other words, the charge / discharge system A1 of this embodiment further includes a remote control 40 that allows the user to set whether or not the control device 2 will perform power supply processing during a power outage when the power supply from the grid power source 90 to the control device 2 is interrupted while the control device 2 has stopped sequence processing. Therefore, the user can set whether or not the control device 2 will perform power supply processing during a power outage by operating the remote control 40.

[0060] (3) Operation of the charging and discharging system The control device 2 shown in Figure 1 stops the sequence processing between the control device 2 and the mobile unit 100 when the period during which the power value of the charging power of the first battery 101 is less than or equal to the first threshold P1 is longer than or equal to a predetermined period T1. The control device 2 also stops the sequence processing when the period during which the power value of the discharge power of the first battery 101 is less than or equal to the second threshold P2 is longer than or equal to a predetermined period T2. The first threshold P1 is a positive value, for example, 1 kW. The second threshold P2 is, for example, the same value (absolute value) as the first threshold P1. The predetermined period T2 is, for example, the same period as the predetermined period T1. The first threshold P1 and the second threshold P2 are stored in the memory of the control device 2 in advance. "Power value of the charging power of the first battery 101" refers to the power value (positive value) of the power when the charge / discharge device 1 charges the first battery 101. Furthermore, the "power value of the discharge power of the first battery 101" refers to the power value (positive value) of the power when the charge / discharge device 1 discharges the first battery 101. The power values ​​of the charging power and discharge power of the first battery 101 are positive values, but in Figure 3, in order to make it easier to visually understand the charging and discharging states of the first battery 101, the power value of the charging power of the first battery 101 is represented as a positive value, and the power value of the discharge power of the first battery 101 is represented as a negative value. In addition, the first threshold P1 and the second threshold P2 are positive values, but in Figure 3, in order to make it easier to visually understand the charging and discharging states of the first battery 101, the first threshold P1 is represented as a positive value, and the second threshold P2 is represented as a negative value.

[0061] Time point t1 in Figure 3 represents the point in time when the control device 2 starts sequence processing. Time point t2 in Figure 3 represents the point in time when power transfer between the mobile body 100 and the charge / discharge device 1 is permitted. Time point t3 in Figure 3 represents the point in time when the power value of the charging power of the first battery 101 is at the first threshold P1. Time point t4 in Figure 3 represents the point in time when the period during which the power value of the charging power of the first battery 101 is less than or equal to the first threshold P1 has reached a predetermined period T1. Time point t5 in Figure 3 represents the point in time when the control device 2 resumes sequence processing. Time point t6 in Figure 3 represents the point in time when the power value of the discharge power of the first battery 101 is at the second threshold P2. Time point t7 in Figure 3 represents the point in time when the period during which the power value of the discharge power of the first battery 101 is less than or equal to the second threshold P2 has reached a predetermined period T2.

[0062] The control device 2 of the charge / discharge system A1 stops sequence processing, for example, when the period during which the power value of the charging power of the first battery 101 is less than or equal to the first threshold P1 is greater than or equal to a predetermined period T1, and when the period during which the power value of the discharge power of the first battery 101 is less than or equal to the second threshold P2 is greater than or equal to a predetermined period T2. In other words, the control device 2 stops sequence processing when the power values ​​of the charging power and discharge power of the first battery 101 are small, because the charging efficiency and discharge efficiency of the first battery 101 deteriorate, and the power consumption of the mobile unit 100 increases. As a result, the power consumption of the mobile unit 100 can be reduced in the charge / discharge system A1. In particular, when the controller of the mobile unit 100 performs sequence processing with the control device 2 of the charge / discharge system A1, the power consumption of the mobile unit 100 tends to increase. Furthermore, if the mobile unit 100 is a vehicle with high power consumption (for example, a vehicle equipped with a battery with a battery voltage of 800V), the power consumption tends to be significantly higher than if the mobile unit 100 is a vehicle with low power consumption (for example, a vehicle equipped with a battery with a battery voltage of 450V). For example, if the upper limit of the voltage exchanged between the mobile unit 100 and the charge / discharge device 1 is 450V, then in a vehicle equipped with a battery with a battery voltage of 800V, the output voltage of the battery needs to be reduced (the output voltage of the battery needs to be reduced from 800V to 450V), which increases power consumption. Therefore, the power consumption of the mobile unit 100 can be reduced by using the charge / discharge system A1. In addition, the power consumption of the charge / discharge system A1 can also be reduced.

[0063] The control device 2 stops sequence processing when the period during which the power value of the charging power of the first battery 101 is less than or equal to the first threshold is a predetermined period T1 or longer. However, it may also stop sequence processing when both the period during which the power value of the charging power of the first battery 101 is less than or equal to the first threshold P1 and the period during which the power value of the discharge power of the first battery 101 is less than or equal to the second threshold P2 (for example, the sum of consecutive periods) is a predetermined period T1 or a predetermined period T2 or longer. In other words, the control device 2 only needs to stop sequence processing when at least one of the periods during which the power value of the charging power of the first battery 101 is less than or equal to the first threshold P1 and the period during which the power value of the discharge power of the first battery 101 is less than or equal to the second threshold P2 is a predetermined period T1 or a predetermined period T2 or longer. Note that the conditions under which the control device 2 stops sequence processing are not limited to the above conditions and can be changed as appropriate.

[0064] Furthermore, as described above, the control device 2 of the charge / discharge system A1 is configured to perform sequence processing with the mobile body 100 and to control the charge / discharge device 1 that charges and discharges the first battery 101 of the mobile body 100. As described above, the control device 2 controls the charge / discharge device 1 to charge and discharge the first battery 101 after the transfer of power between the mobile body 100 and the charge / discharge device 1 is permitted in the sequence processing. Also, as described above, the control device 2 stops the sequence processing when at least one of the periods in which the power value of the charging power of the first battery 101 is less than or equal to the first threshold P1 and the power value of the discharge power of the first battery 101 is less than or equal to the second threshold P2 is greater than or equal to a predetermined period T1 or a predetermined period T2. As a result, the control device 2 can reduce the power consumption of the mobile body 100, similar to the charge / discharge system A1 described above. Furthermore, the control device 2 can also reduce the power consumption of the charge / discharge system A1, similar to the charge / discharge system A1 described above.

[0065] Incidentally, the remote control 40 shown in Figure 2 is configured to allow, for example, whether or not the control device 2 performs power supply processing during a power outage. The user can use the operation unit 42 to set whether or not to perform power supply processing during a power outage, and the remote control 40 transmits the user's setting information to the control device 2 via the power supply unit 20. The control device 2 switches whether or not to perform power supply processing during a power outage based on the setting information from the remote control 40.

[0066] The remote control 40 is configured to allow selection of the type of mobile unit 100. For example, the remote control 40 is configured to allow selection of the vehicle type ID that indicates the type of mobile unit 100. "Vehicle type ID" means, for example, an identification number used to identify the vehicle type of mobile unit 100. The memory of the remote control 40 stores setting information for each type of mobile unit 100 (vehicle type ID) to determine whether or not to perform power supply processing during a power outage. For example, since there are types (vehicle types) of mobile unit 100 that do not support power supply processing during a power outage, setting information for each type of mobile unit 100 to determine whether or not to perform power supply processing during a power outage is stored. When a user operates the operation unit 42 of the remote control 40 to select the type of mobile unit 100, the remote control 40 reads the setting information corresponding to the selected type of mobile unit 100 from the memory and transmits it to the control device 2 via the power supply unit 20. The control device 2 switches whether or not to perform power supply processing during a power outage based on the setting information from the remote control 40. In this way, the remote control 40 sets whether or not to perform power supply processing during a power outage according to the selected type of mobile unit 100. Therefore, the user can set whether or not to perform power supply processing during a power outage simply by selecting the type of mobile device 100.

[0067] The remote control 40 may also transmit vehicle type information (e.g., vehicle type ID) related to the type of mobile device 100 selected by the user to the control device 2 via the power supply unit 20. The control device 2's memory is pre-stored with setting information that corresponds to the vehicle type information of the mobile device 100 and determines whether or not to perform power supply processing during a power outage. The control device 2 reads the setting information corresponding to the vehicle type information input from the remote control 40 from the memory and switches whether or not to perform power supply processing during a power outage based on the read setting information.

[0068] Furthermore, the remote control 40 shown in Figure 2 is configured to allow, for example, the presence or absence of the first threshold P1 and the second threshold P2 settings. Also, the remote control 40 is configured to allow, for example, the change of the values ​​of the first threshold P1 and the second threshold P2 if they are set. As a result, the charging and discharging system A1 can enable or disable the settings of the first threshold P1 and the second threshold P2 based on, for example, the user's operation of the remote control 40. In addition, the charging and discharging system A1 can change the first threshold P1 and the second threshold P2 based on the user's operation of the remote control 40. In other words, the charging and discharging system A1 can meet a variety of user needs.

[0069] Furthermore, the remote control 40 is configured to allow selection of the type of mobile body 100 (in the example in Figure 2, the vehicle type ID). Depending on the selected type of mobile body 100, the remote control 40 changes, for example, whether or not to set the first threshold P1 and the second threshold P2, and the values ​​of the first threshold P1 and the second threshold P2. As a result, in the charging / discharging system A1, for example, the user can set the first threshold P1 and the second threshold P2 that are appropriate for the type of mobile body 100 simply by selecting the type of mobile body 100 displayed on the display unit 41. In other words, in the charging / discharging system A1, the user can set the optimal parameters (for example, the first threshold P1 and the second threshold P2) corresponding to the vehicle type of mobile body 100 owned by the user. For example, in the charging / discharging system A1, if the mobile body 100 is a vehicle with high power consumption, the first threshold P1 is set higher and the second threshold P2 is set lower than when the mobile body 100 is a vehicle with low power consumption.

[0070] The control device 2 shown in Figure 1, for example as shown in Figure 4, changes the first threshold P1 (see Figure 3) and the second threshold P2 (see Figure 3) so that their absolute values ​​decrease (become smaller values) if the number of times the sequence processing is stopped within a predetermined period (first predetermined period) T3 is equal to or greater than a first predetermined number. In other words, when the control device 2 determines that the number of times the sequence processing is stopped within the first predetermined period T3 is equal to or greater than a first predetermined number, it changes the first threshold P1 and the second threshold P2 so that their absolute values ​​decrease (become smaller values) than the values ​​at the time of determination. Furthermore, when the number of times the sequence processing is stopped within the first predetermined period T3 is less than a first predetermined number, the control device 2 changes the first threshold P1 and the second threshold P2 so that their absolute values ​​increase (become larger values). In other words, if the control device 2 determines that the number of times the sequence processing is stopped within the first specified period T3 is less than the first predetermined number, it changes the values ​​of the first threshold P1 and the second threshold P2 so that they increase from the values ​​at the time of determination (so that they become larger than the values ​​at the time of determination). In short, if the number of times the sequence processing is stopped within the first specified period T3 is equal to or greater than the first predetermined number, the control device 2 changes the values ​​of the first threshold P1 and the second threshold P2 so that the number of times the sequence processing is stopped does not increase.

[0071] Furthermore, if the number of times the sequence processing is stopped within the first specified period T3 is less than the first predetermined number, the control device 2 changes the values ​​of the first threshold P1 and the second threshold P2 to increase the number of times the sequence processing is stopped. The first specified period T3 is, for example, half a day. The first specified period T3 and the first predetermined number are stored in the memory of the control device 2. The times t14 to t19 in Figure 4 represent the times when the control device 2 stopped the sequence processing. The example in Figure 4 shows the number of times the sequence processing is executed and stopped in half a day, and represents the case where the sequence processing is executed 7 times. The first specified period T3 is not limited to half a day, but may be, for example, one day.

[0072] For example, when the first predetermined number of times is set to 6, the control device 2 changes the first threshold P1 and the second threshold P2 to smaller values ​​if the number of times the sequence processing is stopped within the first predetermined period T3 is 6, as shown in Figure 4. Also, if the number of times the sequence processing is stopped within the first predetermined period T3 is 4, the control device 2 changes the first threshold P1 and the second threshold P2 to larger values. As a result, in the charge / discharge system A1, for example, if the number of times the sequence processing is stopped within the first predetermined period T3 is high, the increase in the number of sequence processing stops can be suppressed, thus extending the lifespan of components used in the mobile body 100 and the charge / discharge system A1 (for example, contact devices). In particular, contact devices such as relays in the mobile body 100 are consumable parts, and the number of times the contacts are turned on and off (number of uses) is finite, so it is not desirable to repeatedly stop and restart the sequence processing. Therefore, in the charge / discharge system A1, for example, if the number of sequence processing stops within the first specified period T3 is high, the values ​​of the first threshold P1 and the second threshold P2 are changed so as not to increase the number of sequence processing stops, in order to prevent the lifespan of the components used in the mobile body 100 from being reached prematurely. Also, in the charge / discharge system A1, for example, if the number of sequence processing stops within the first specified period T3 is low, the number of sequence processing stops can be increased, thereby further reducing the power consumption of the mobile body 100.

[0073] Here, the control device 2 may change the durations of predetermined periods T1 (see Figure 3) and T2 (see Figure 3) so that they increase (become longer periods) if the number of times the sequence processing is stopped within the first predetermined period T3 is equal to or greater than the first predetermined number. In other words, the control device 2 may change the durations of predetermined periods T1 and T2 so that they increase (become longer periods) than the duration at the time of determination if it is determined that the number of times the sequence processing is stopped within the first predetermined period T3 is equal to or greater than the first predetermined number. Furthermore, the control device 2 may change the durations of predetermined periods T1 and T2 so that they decrease (become shorter periods) if the number of times the sequence processing is stopped within the first predetermined period T3 is less than the first predetermined number. In other words, if the control device 2 determines that the number of times the sequence processing is stopped within the first specified period T3 is less than the first predetermined number, it may change the duration of the predetermined period T1 and predetermined period T2 so that they are shorter than the duration at the time of determination. This allows the charge / discharge system A1 to further suppress the increase in the number of sequence processing stops within the first specified period T3, for example, if the number of sequence processing stops within the first specified period T3 is high, thereby further extending the lifespan of the mobile body 100 and the components used in the charge / discharge system A1. Also, if the charge / discharge system A1 has a low number of sequence processing stops within the first specified period T3, for example, the number of sequence processing stops can be further increased, thereby further reducing the power consumption of the mobile body 100.

[0074] The control device 2 shown in Figure 1 preferably stops sequence processing when the charge / discharge device 1 is not charging or discharging the first battery 101. In other words, the control device 2 preferably stops sequence processing when it is not the charging or discharging period for the first battery 101. This allows the power consumption of the mobile unit 100 to be further reduced in the charge / discharge system A1. Furthermore, it is even more preferable for the control device 2 to stop sequence processing when the state in which the charge / discharge device 1 is not charging or discharging the first battery 101 continues for a predetermined period of time (for example, 5 minutes). This allows the charge / discharge system A1 to accurately detect periods in which the charge / discharge device 1 is not charging or discharging the first battery 101, thereby suppressing, for example, the erroneous stopping of sequence processing. Note that "when the charge / discharge device 1 is not charging or discharging the first battery 101" means, for example, periods other than the charging / discharging period for the charge / discharge device 1 (for example, the standby period of the charge / discharge device 1). Furthermore, "a state in which the charge / discharge device 1 is not charging or discharging the first battery 101" means, for example, a state in which the charge / discharge device 1 is not charging or discharging the first battery 101 (in other words, the charge / discharge device 1 is in a standby state).

[0075] It is preferable for the control device 2 to stop sequence processing when the first battery 101 has been charged by the charge / discharge device 1 and is fully charged. More specifically, it is preferable for the control device 2 to stop sequence processing when the first battery 101 is fully charged in a mode in which the charge / discharge device 1 performs only charging (one of the operating modes described later). This allows the charge / discharge system A1 to further reduce the power consumption of the mobile body 100. Furthermore, the charge / discharge system A1 can reduce the degradation of the first battery 101 of the mobile body 100. It is even more preferable for the control device 2 to stop sequence processing when the state in which the first battery 101 has been charged by the charge / discharge device 1 and is fully charged continues for the aforementioned certain period of time. This allows the charge / discharge system A1 to accurately detect when the first battery 101 is fully charged, thereby suppressing, for example, the erroneous stopping of sequence processing. Furthermore, "the state in which the first battery 101 is fully charged" means, for example, a state in which the first battery 101 cannot be charged, and includes, for example, a state in which the charge rate (SOC: State of Charge) of the first battery 101 is 100%. However, "the state in which the first battery 101 is fully charged" is not limited to a state in which the charge rate of the first battery 101 is 100%, but also includes, for example, a state in which the charge rate of the first battery 101 is 80% or higher, and also includes a state in which the first battery 101 cannot be charged during a specific time period due to a setting of the charge rate of the first battery 101 by user operation (for example, operation of the remote control 40 by the user).

[0076] Furthermore, it is preferable that the control device 2 stops sequence processing when the first battery 101 has been discharged by the charge / discharge device 1 and is at its discharge limit. More specifically, it is preferable that the control device 2 stops sequence processing when the first battery 101 is at its discharge limit in a mode in which the charge / discharge device 1 performs only discharge (one of the operating modes described later). This allows the charge / discharge system A1 to further reduce the power consumption of the mobile body 100. It is even more preferable that the control device 2 stops sequence processing when the state in which the first battery 101 has been discharged by the charge / discharge device 1 and is at its discharge limit continues for a certain period of time. This allows the charge / discharge system A1 to accurately detect when the first battery 101 is at its discharge limit, thereby suppressing, for example, the erroneous stopping of sequence processing. Furthermore, "the state in which the first battery 101 is at its discharge limit" means, for example, a state in which the first battery 101 cannot be discharged, and includes, for example, a state in which the charge level of the first battery 101 is 20% or less.

[0077] It is preferable for the control device 2 to stop sequence processing when the first battery 101 or the energy storage unit 12 is fully charged. More specifically, it is preferable for the control device 2 to stop sequence processing when the first battery 101 or the energy storage unit 12 is fully charged when power is being exchanged between the first battery 101 and the energy storage unit 12. It is also preferable for the control device 2 to stop sequence processing when the first battery 101 or the energy storage unit 12 is at its discharge limit. More specifically, it is preferable for the control device 2 to stop sequence processing when the first battery 101 or the energy storage unit 12 is at its discharge limit when power is being exchanged between the first battery 101 and the energy storage unit 12. This allows the power consumption of the mobile body 100 to be further reduced in the charge / discharge system A1. It is also preferable for the control device 2 to stop sequence processing when the first battery 101 or the energy storage unit 12 remains fully charged for the aforementioned certain period of time. Furthermore, it is more preferable for the control device 2 to stop the sequence processing if the state in which the first battery 101 or the energy storage unit 12 is at the discharge limit continues for the aforementioned certain period of time. This allows the charge / discharge system A1 to accurately detect whether the first battery 101 or the energy storage unit 12 is fully charged or at the discharge limit, thereby suppressing, for example, the erroneous stopping of the sequence processing.

[0078] In this case, if the power supply from the grid power 90 stops while the control device 2 has stopped sequence processing with the mobile unit 100, the control device 2 will continue operation by receiving power from the second battery 4. The power control device 23 of the power device 20 also monitors whether or not power is being supplied from the grid power 90, and when the power supply from the grid power 90 stops, it instructs the power switching unit 70 to switch from the first connection state to the second connection state. At this time, the power switching unit 70 switches from the first connection state to the second connection state and connects the output of the self-sustaining operation side of the first power converter to the distribution board 80. Furthermore, when the power control device 23 of the power device 20 detects that the power supply from the grid power 90 has stopped, it outputs a notification signal to the control device 2 to notify it of the power outage. For example, when the control device 2 receives a power outage notification signal from the power control device 23, it determines that the power supply from the grid power 90 has stopped, receives power from the second battery 4, and resumes sequence processing. Then, when the control device 2 is authorized to exchange power between the mobile body 100 and the charge / discharge device 1 during sequence processing, it controls the charge / discharge device 1 to discharge the first battery 101. At this time, the charge / discharge device 1 converts the DC voltage output from the first battery 101 of the mobile body 100 into an AC voltage and outputs it to the power device 20. The power device 20 converts the DC voltage output from the charge / discharge device 1 into an AC voltage and supplies it to the load 81 via the power switching unit 70 and the distribution board 80.

[0079] Thus, in this embodiment, the auxiliary power supply PS1 is a second battery 4 that is charged with power supplied from the grid power supply 90. The second battery 4 can also be charged with power supplied from, for example, a distributed power supply 30 such as a solar cell module 30A and a power storage device 10, or from a first battery 101 provided in the mobile unit 100. Here, the second battery 4 can be charged by an external power supply PS2 provided outside the housing 60 that houses the charge / discharge device 1 and the control device 2. The external power supply PS2 may include, for example, at least one of a distributed power supply 30 such as a solar cell module 30A and a power storage device 10, the grid power supply 90, and a first battery 101 provided in the mobile unit 100. In other words, the second battery 4 may be charged with power supplied from the distributed power supply 30, or with power supplied from the first battery 101 of the mobile unit 100. In other words, the auxiliary power supply PS1 is a second battery 4 that is charged with power supplied from an external power supply PS2, and the control device 2 operates by receiving power from the second battery 4 from the time it resumes sequence processing until power supply from the first battery 101 becomes possible. Therefore, even if the power supply from the grid power supply 90 to the control device 2 is stopped while sequence processing is stopped, the control device 2 can resume sequence processing by receiving power from the second battery 4, which is the auxiliary power supply PS1. Thus, the charge / discharge system A1 can discharge from the first battery 101 of the mobile body 100. After the control device 2 resumes sequence processing, once power supply from the first battery 101 becomes possible, the control device 2 operates with power supplied from the first battery 101. Therefore, the second battery 4 only needs to have a storage capacity that can store enough power to operate the control device 2 during the third predetermined period (for example, several minutes to several tens of minutes) from the time the control device 2 resumes sequence processing until power supply from the first battery 101 becomes possible.

[0080] By the way, when the charge / discharge device 1 is discharging the first battery 101 of the mobile body 100, it is preferable that the locking part 7 prevents the second connector CN2 from detaching from the first connector CN1. Before the control device 2 stopped sequence processing, the charge / discharge device 1 was charging and discharging the first battery 101, so the control device 2 switched the locking part 7 to the locked state. Here, when the control device 2 resumes sequence processing from a stopped state, if the locking part 7 has been switched to the locked state, the control device 2 does not need to switch the locking part 7 to the locked state, and maintains the locking part 7 in the locked state. In other words, when the locking part 7 has been switched to the locked state while sequence processing is stopped, the power supply processing during a power outage performed by the control device 2 includes the process of maintaining the locking part 7 in the locked state. On the other hand, when the control device 2 resumes sequence processing from a stopped state, if the locking part 7 has been switched to the unlocked state, the control device 2 switches the locking part 7 to the locked state. In other words, the power supply process performed by the control device 2 when it resumes sequence processing during a power outage further includes a process to switch the locking unit 7 to a locked state. As a result, when the control device 2 performs the power supply process during a power outage and starts supplying power from the first battery 101, the locking unit 7 is locked, which reduces the possibility of the second connector CN2 detaching from the first connector CN1 of the mobile body 100.

[0081] Furthermore, if the power supply from the grid power source 90 is interrupted while the control device 2 has stopped sequence processing, and the charging voltage of the second battery 4 is below the third threshold, the control device 2 does not perform the power outage power supply process and switches the lock unit 7 to the unlocked state. Here, if the charging voltage of the second battery 4 is higher than the third threshold, the second battery 4 can supply power to the control device 2 for a third predetermined period or longer. If the charging voltage of the second battery 4 is below the third threshold, there is a possibility that the power supply from the second battery 4 to the control device 2 will be interrupted between the time the control device 2 resumes sequence processing and the time when power supply from the first battery 101 becomes possible. In this case, the control device 2 does not perform the power outage power supply process and switches the lock unit 7 to the unlocked state, thereby suppressing unnecessary power consumption of the first battery 101 of the mobile body 100.

[0082] (4) Variations The above embodiments are merely one of many embodiments of this disclosure. The above embodiments can be modified in various ways depending on the design, etc., as long as the objectives of this disclosure are achieved. Furthermore, functions similar to those of the control device 2 provided in the charge / discharge system A1 may be embodied in a control method for the control device 2, a computer program, or a non-temporary recording medium on which the program is stored. One embodiment of the control method for the control device 2 is a control method for the control device 2 that can control a charge / discharge device 1 that exchanges power between the battery 101 of a mobile body 100 having a battery 101 and at least one of the grid power supply 90 and the load 81. The control method for the control device 2 performs sequence processing with the mobile body 100. In the control method for the control device 2, if the power supply from the grid power supply 90 is stopped while the sequence processing is stopped after the exchange of power between the mobile body 100 and the charge / discharge device 1 has been permitted in the sequence processing, the control device 2 receives power from an auxiliary power supply PS1 different from the grid power supply 90 and the battery 101 and performs power supply processing during a power outage. Power supply processing during a power outage includes restarting the sequence processing and starting power supply from the battery 101. A (computer) program according to one embodiment is a program that causes one or more processors to execute a control method for the control device 2.

[0083] The following lists some modifications of the above embodiment. The modifications described below can be combined and applied as appropriate.

[0084] The entity executing the charge / discharge device 1, the control device 2, or the control method for the control device 2 in this disclosure includes a computer system. The computer system mainly consists of a processor and memory as hardware. The processor executes a program recorded in the memory of the computer system, thereby realizing the function of the entity executing the charge / discharge device 1, the control device 2, or the control method for the control device 2 in this disclosure. The program may be pre-recorded in the memory of the computer system, provided via a telecommunications line, or provided on a non-temporary recording medium such as a memory card, optical disk, or hard disk drive that can be read by the computer system. The processor of the computer system consists of one or more electronic circuits including semiconductor integrated circuits (ICs) or large-scale integrated circuits (LSIs). The integrated circuits such as ICs and LSIs referred to here are named differently depending on the degree of integration, and include integrated circuits called system LSIs, VLSIs (Very Large Scale Integration), or ULSIs (Ultra Large Scale Integration). Furthermore, FPGAs (Field-Programmable Gate Arrays) programmed after the LSI is manufactured, or logic devices capable of reconfiguring internal junctions or circuit compartments within an LSI, can also be used as processors. Multiple electronic circuits may be integrated onto a single chip or distributed across multiple chips. Multiple chips may be integrated into a single device or distributed across multiple devices. The computer system referred to here includes a microcontroller having one or more processors and one or more memories. Therefore, the microcontroller also consists of one or more electronic circuits, including semiconductor integrated circuits or large-scale integrated circuits.

[0085] In the above embodiment, the auxiliary power supply PS1 was the second battery 4, but the auxiliary power supply PS1 may also be the distributed power supply 30. That is, the auxiliary power supply PS1 may be the distributed power supply 30 capable of supplying power to at least one of the mobile body 100 and the load 81. The control device 2 operates by receiving power from the distributed power supply 30 from the time the sequence processing is restarted until power can be supplied from the battery (first battery) 101. Therefore, even if the power supply from the grid power supply 90 to the control device 2 is stopped while the sequence processing is stopped, the control device 2 can receive power from the distributed power supply 30, which is the auxiliary power supply PS1, and restart the sequence processing. Thus, the charge / discharge system A1 can discharge from the first battery 101 of the mobile body 100.

[0086] In the above embodiment, the second threshold P2 is the same value (absolute value) as the first threshold P1, but it may be a different value (absolute value). The predetermined period T2 is the same period as the predetermined period T1, but it may be a different period.

[0087] The remote control 40 is configured to allow the setting of the first threshold P1 and the second threshold P2 to be changed, but it may also be configured to allow the setting of other parameters, such as a predetermined period T1 and a first predetermined number of times, in addition to the setting of the first threshold P1 and the second threshold P2. Furthermore, the remote control 40 is configured to allow the values ​​of the first threshold P1 and the second threshold P2 to be changed, but it may also be configured to allow the setting of other parameters, such as the duration of the predetermined period T1 and the value of the first predetermined number of times, in addition to the values ​​of the first threshold P1 and the second threshold P2.

[0088] In the above embodiment, the distributed power source 30 is a solar cell module 30A and an energy storage device 10. However, the distributed power source 30 is not limited to a solar cell module 30A and an energy storage device 10, and may be, for example, a small hydroelectric power generation system, a wind power generation system, or a fuel cell.

[0089] The charge / discharge system A1 may include, for example, a power switching unit 70 and a distribution board 80. The charge / discharge system A1 also includes a power device 20 and a solar cell module 30A, but does not necessarily include the power device 20 and the solar cell module 30A. In this case, the remote control 40 is electrically connected to the control device 2. Furthermore, the charge / discharge system A1 includes a remote control 40, but does not necessarily include the remote control 40. Also, the charge / discharge system A1 includes an energy storage device 10, but does not necessarily include the energy storage device 10.

[0090] The charging and discharging system A1 supplies the power stored in the first battery 101 to the energy storage device 10 and the distribution board 80, but it may also supply it to the grid power supply 90, for example.

[0091] The charge / discharge system A1 may further include a power converter 3, as shown in Figure 5, for example. The power converter 3 converts the first AC power to the first DC power. The power converter 3 also converts the first DC power to the first AC power. In short, the power converter 3 is a bidirectional converter (bidirectional AC-DC converter). In this case, the power converter 3 is electrically connected to the charge / discharge device 1 and the first power converter 21 of the power device 20. The power converter 3 is also electrically connected to the distribution board 80 via a power switching unit 70. The power converter 3 is also electrically connected to the grid power supply 90 via a power switching unit 70. The power converter 3 supplies the first DC power to the charge / discharge device 1. The power converter 3 also supplies the first AC power to at least one of the power device 20, the distribution board 80, and the grid power supply 90.

[0092] In the above embodiment, the mobile unit 100 is an electric vehicle, but it may also be an electric motorcycle or the like, and the mobile unit 100 is not limited to a vehicle.

[0093] Furthermore, in the above explanation, where "less than or equal to" is used in the comparison of two values, it may also be used as "less than." In other words, whether or not the case where the two values ​​are equal is included in the comparison of two values ​​can be arbitrarily changed depending on the setting of the reference value, etc., so there is no technical difference between using "less than or equal to" and "less than." Similarly, where "greater than or equal to" is used, it may also be used as "greater than."

[0094] (summary) Based on the embodiments described above, the following aspects are disclosed.

[0095] A first embodiment of the charge / discharge system (A1) comprises a charge / discharge device (1) and a control device (2). The charge / discharge device (1) exchanges power between the battery (101) of a mobile body (100) having a battery (101) and at least one of the grid power supply (90) and the load (81). The control device (2) performs sequence processing with the mobile body (100) and controls the charge / discharge device (1). If the power supply from the grid power supply (90) is stopped while the sequence processing has been stopped after the exchange of power between the mobile body (100) and the charge / discharge device (1) has been permitted in the sequence processing, the control device (2) receives power from an auxiliary power supply (PS1) different from the grid power supply (90) and performs power supply processing during a power outage. Power supply processing during a power outage includes restarting the sequence processing and starting power supply from the battery (101).

[0096] According to this embodiment, if the power supply from the grid power source (90) is stopped while the sequence processing is stopped, the control device (2) can operate by receiving power from an auxiliary power source (PS1) different from the grid power source (90). The control device (2) restarts the sequence processing and performs a power supply process during a power outage to start supplying power from the battery (101), so that even if the power supply from the grid power source (90) is stopped while the sequence processing is stopped, the battery (101) of the mobile unit (100) can be discharged.

[0097] In the second embodiment of the charge / discharge system (A1), the battery (101) of the mobile body (100) is the first battery (101) as in the first embodiment. The auxiliary power supply (PS1) is the second battery (4), which is charged with power supplied from an external power supply (PS2). The control device (2) operates by receiving power from the second battery (4) from the time sequence processing is resumed until power supply from the first battery (101) becomes possible.

[0098] According to this embodiment, even if the power supply from the grid power source (90) is stopped while the control device (2) is stopped from sequence processing, it can receive power from the second battery (4) and restart sequence processing.

[0099] In the third embodiment of the charge / discharge system (A1), in the second embodiment, the charge / discharge device (1) is connected to the mobile body (100) via a charge / discharge cable (CB1) having a second connector (CN2) that is detachable from a first connector (CN1) on the mobile body (100). The second connector (CN2) is provided with a locking part (7). The locking part (7) can be switched between a locked state and an unlocked state. The locked state is when the second connector (CN2) is connected to the first connector (CN1) and the second connector (CN2) cannot be removed from the first connector (CN1). The unlocked state is when the second connector (CN2) is connected to the first connector (CN1) and the second connector (CN2) can be removed from the first connector (CN1). When the locking part (7) is switched to the locked state while sequence processing is stopped, the power supply processing during a power outage further includes processing to maintain the locking part (7) in the locked state.

[0100] According to this embodiment, when power supply processing is performed during a power outage and discharge occurs from the first battery (101) of the mobile unit (100), the possibility of the second connector (CN2) becoming detached from the first connector (CN1) can be reduced.

[0101] In the fourth embodiment of the charge / discharge system (A1), in the third embodiment, if the power supply from the grid power source (90) is stopped while the control device (2) has stopped sequence processing, and the charging voltage of the second battery (4) is below the third threshold, the control device (2) does not perform the power supply processing during a power outage and switches the lock unit (7) to the unlocked state.

[0102] According to this embodiment, the possibility of power supply from the second battery (4) to the control device (2) being interrupted between the time the control device (2) resumes sequence processing and the time when power supply from the first battery (101) of the mobile body (100) begins is reduced.

[0103] In the fifth embodiment of the charge / discharge system (A1), in the first embodiment, the auxiliary power supply (PS1) is a distributed power supply (30) capable of supplying power to at least one of the mobile body (100) and the load (81). The control device (2) operates by receiving power from the distributed power supply (30) from the time sequence processing is resumed until power can be supplied from the battery (101).

[0104] According to this embodiment, even if the power supply from the grid power source (90) is stopped while the control device (2) is stopped from sequence processing, it can receive power from the distributed power source (30) and restart sequence processing.

[0105] In the sixth embodiment of the charge / discharge system (A1), in the fifth embodiment, the charge / discharge device (1) is connected to the mobile body (100) via a charge / discharge cable (CB1) having a second connector (CN2) that is detachable from a first connector (CN1) on the mobile body (100). The second connector (CN2) is provided with a locking part (7). The locking part (7) can be switched between a locked state and an unlocked state when the second connector (CN2) is connected to the first connector (CN1). The locked state is when the second connector (CN2) is connected to the first connector (CN1) and the second connector (CN2) cannot be removed from the first connector (CN1). The unlocked state is when the second connector (CN2) is connected to the first connector (CN1) and the second connector (CN2) can be removed from the first connector (CN1). If the lock unit (7) is switched to the locked state while the sequence processing is stopped, the power supply processing during a power outage further includes processing to maintain the lock unit (7) in the locked state.

[0106] According to this embodiment, when power supply processing is performed during a power outage and discharge occurs from the first battery (101) of the mobile unit (100), the possibility of the second connector (CN2) becoming detached from the first connector (CN1) can be reduced.

[0107] The seventh embodiment of the charge / discharge system (A1) further includes a remote control (40) that can be set whether or not the control device (2) performs power supply processing during a power outage, in any of the first to sixth embodiments.

[0108] According to this embodiment, the user can use the remote control (40) to set whether or not the control device (2) will perform power supply processing during a power outage when the power supply from the grid power source (90) is stopped while sequence processing is stopped.

[0109] In the eighth aspect of the charging and discharging system (A1), in the seventh aspect, the remote control (40) is configured to select the type of mobile body (100), and sets whether or not to perform power supply processing during a power outage depending on the selected type of mobile body (100).

[0110] According to this embodiment, by selecting the type of mobile body (100), it is possible to set whether or not to perform power supply processing during a power outage, thus simplifying the setup process.

[0111] The control device (2) of the ninth embodiment is capable of controlling the charge / discharge device (1). The charge / discharge device (1) exchanges power between the battery (101) of a mobile body (100) having a battery (101) and at least one of the grid power supply (90) and the load (81). The control device (2) performs sequence processing with the mobile body (100). If the power supply from the grid power supply (90) is stopped while the sequence processing has been stopped after the exchange of power between the mobile body (100) and the charge / discharge device (1) has been permitted in the sequence processing, the control device (2) receives power from an auxiliary power supply (PS1) different from the grid power supply (90) and performs power supply processing during a power outage. Power supply processing during a power outage includes restarting the sequence processing and starting power supply from the battery (101).

[0112] According to this embodiment, if the power supply from the grid power source (90) is stopped while the sequence processing is stopped, the control device (2) can operate by receiving power from an auxiliary power source (PS1) different from the grid power source (90). The control device (2) restarts the sequence processing and performs a power supply process during a power outage to start supplying power from the battery (101), so that even if the power supply from the grid power source (90) is stopped while the sequence processing is stopped, the battery (101) of the mobile unit (100) can be discharged.

[0113] The control method of the tenth embodiment is a control method for a control device (2) capable of controlling a charge / discharge device (1). The charge / discharge device (1) exchanges power between the battery (101) of a mobile body (100) having a battery (101) and at least one of the grid power supply (90) and the load (81). The control device (2) performs sequence processing with the mobile body (100). If the power supply from the grid power supply (90) is stopped while the sequence processing is stopped after the exchange of power between the mobile body (100) and the charge / discharge device (1) has been permitted in the sequence processing, the control device (2) receives power from an auxiliary power supply (PS1) different from the grid power supply (90) and performs power supply processing during a power outage. Power supply processing during a power outage includes restarting the sequence processing and starting power supply from the battery (101).

[0114] According to this embodiment, if the power supply from the grid power source (90) is stopped while the sequence processing is stopped, the control device (2) can operate by receiving power from an auxiliary power source (PS1) different from the grid power source (90). The control device (2) restarts the sequence processing and performs a power supply process during a power outage to start supplying power from the battery (101), so that even if the power supply from the grid power source (90) is stopped while the sequence processing is stopped, the battery (101) of the mobile unit (100) can be discharged.

[0115] The program of the eleventh embodiment is a program that causes one or more processors to execute the control method described in the tenth embodiment.

[0116] According to this embodiment, even if the power supply from the grid power source (90) is stopped while the control device (2) has stopped sequence processing with the mobile body (100), the battery (101) of the mobile body (100) can be discharged.

[0117] Not limited to the above embodiments, various configurations (including modifications) of the control device (2) according to the above embodiment can be embodied in a control method for the control device (2), a (computer) program, or a non-temporary recording medium on which the program is recorded.

[0118] The configurations relating to the second to eighth aspects are not essential to the charge / discharge system (A1) and can be omitted as appropriate. [Explanation of Symbols]

[0119] 1 Charge / discharge device 2 Control device 4. Second Battery 7 Locking mechanism 30 Distributed power supply 40 Remote Controls 81 load 90 Grid power supply 100 Mobile Units 101 Storage Battery (First Storage Battery) A1 Charging and discharging system CB1 Charging and Discharging Cable CN1 First Connector CN2 Second Connector PS1 auxiliary power supply PS2 external power supply

Claims

1. A mobile body having a storage battery, and a charging / discharging device that exchanges power between the storage battery and at least one of the grid power supply and the load, The system includes a control device that performs sequence processing with the mobile body and controls the charging and discharging device, The control device is If, after power transfer is permitted between the mobile body and the charging / discharging device during the sequence processing, the power supply from the grid power source is interrupted while the sequence processing is stopped, the system will receive power from an auxiliary power source different from the grid power source, restart the sequence processing, and perform a power outage power supply process to start power supply from the battery. Charging and discharging system.

2. The battery possessed by the mobile body is the first battery, The aforementioned auxiliary power supply is a second battery that is charged with power supplied from an external power source. The control device operates by receiving power from the second battery from the time the sequence processing is resumed until power can be supplied from the first battery. The charge / discharge system according to claim 1.

3. The charging and discharging device is connected to the mobile body via a charging and discharging cable having a second connector that is detachable from a first connector on the mobile body. The second connector is provided with a locking mechanism that allows switching between a locked state in which the second connector cannot be removed from the first connector and an unlocked state in which the second connector can be removed from the first connector, when the second connector is connected to the first connector. When the locking unit is switched to the locked state while the sequence processing is stopped, the power supply processing during a power outage further includes a process to maintain the locking unit in the locked state. The charge / discharge system according to claim 2.

4. If the power supply from the grid power source is interrupted while the control device has stopped the sequence processing, and the charging voltage of the second battery is below the third threshold, the control device will not perform the power outage power supply processing and will switch the lock unit to the unlocked state. The charge / discharge system according to claim 3.

5. The auxiliary power supply is a distributed power supply capable of supplying power to at least one of the mobile body and the load. The control device operates by receiving power from the distributed power source from the time the sequence processing is resumed until power can be supplied from the battery. The charge / discharge system according to claim 1.

6. The charging and discharging device is connected to the mobile body via a charging and discharging cable having a second connector that is detachable from a first connector on the mobile body. The second connector is provided with a locking mechanism that allows switching between a locked state in which the second connector cannot be removed from the first connector and an unlocked state in which the second connector can be removed from the first connector, when the second connector is connected to the first connector. When the locking unit is switched to the locked state while the sequence processing is stopped, the power supply processing during a power outage further includes a process to maintain the locking unit in the locked state. The charge / discharge system according to claim 5.

7. The control device further includes a remote control capable of setting whether or not to perform the power supply process during a power outage. The charge / discharge system according to claim 1.

8. The aforementioned remote control is The type of the aforementioned mobile body can be selected. Depending on the type of the selected mobile body, it is set whether or not to perform the power supply process during a power outage. The charge / discharge system according to claim 7.

9. A control device capable of controlling a charge / discharge device that exchanges power between the battery of a mobile body having a battery and at least one of a grid power supply and a load, Sequence processing is performed with the aforementioned moving body, If, after power transfer is permitted between the mobile body and the charging / discharging device during the sequence processing, the power supply from the grid power source is interrupted while the sequence processing is stopped, the system will receive power from an auxiliary power source different from the grid power source, restart the sequence processing, and perform a power outage power supply process to start power supply from the battery. Control device.

10. A control method for a control device capable of controlling a charge / discharge device that exchanges power between a battery in a mobile body having a battery and at least one of a grid power supply and a load, Sequence processing is performed with the aforementioned moving body, If, after power transfer is permitted between the mobile body and the charging / discharging device during the sequence processing, the power supply from the grid power source is interrupted while the sequence processing is stopped, the system will receive power from an auxiliary power source different from the grid power source, restart the sequence processing, and perform a power outage power supply process to start power supply from the battery. Control method.

11. One or more processors are used to execute the control method described in claim 10, program.

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