JP2017192215A - Power control unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bring a charging rate of a storage battery for vehicle nearer to a target charging rate.SOLUTION: An abnormality determination part (21) determines whether or not an abnormality has occurred while a charge and discharge circuit (17) is executing a series of processing procedures for charging or discharging an electric vehicle (2). A resumption control part (22), when it is determined that an abnormality has occurred, makes the charge and discharge circuit (17) resume a series of processing procedures for charging or discharging an electric vehicle (2).SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power control apparatus that charges or discharges an electric vehicle or the like.

  In recent years, electric vehicles driven by electric power have begun to spread in place of vehicles using an internal combustion engine that has a large environmental load due to exhaust gas. An electric vehicle is equipped with a large-capacity storage battery (battery) for storing electric power used during traveling. Therefore, conventionally, as a new method of using electric vehicles, the power in the storage battery of the electric vehicle is supplied to each load (equipment) in the home at the time of a power failure, and the electric power of the commercial power system is used during a time when power demand is high It has been proposed to supply power to each load in the home from an electric vehicle in an assisting manner.

  In many cases, a so-called charging / discharging device having both charging and discharging functions is used for charging an electric vehicle and supplying (discharging) electric power from the electric vehicle to the home. When the charging / discharging device charges the electric vehicle, power supplied from the commercial power system is used. Therefore, when a power failure occurs during charging of the electric vehicle, charging of the electric vehicle by the charging / discharging device is interrupted, and as a result, there is a possibility that the state of charge (SOC) of the storage battery becomes insufficient.

  Conventionally, various techniques for dealing with such a problem have been proposed. For example, Patent Documents 1 to 3 disclose examples of a charging device that has a function of resuming charging after a power failure occurs during charging.

JP 2013-106378 A (published May 30, 2013) JP 7-298512 A (published on November 10, 1995) Japanese Patent Laid-Open No. 10-209533 (released on October 27, 1998)

  The technique of each literature mentioned above is related with charge resumption when a power failure occurs during charge. However, since the problem that the charging rate of the storage battery becomes insufficient may occur even when a power failure does not occur, these conventional techniques cannot solve this problem.

  For example, a conventional charging / discharging device automatically stops charging when an abnormality occurs during charging of an electric vehicle. Thereafter, unless the user operates the charging / discharging device to instruct charging of the electric vehicle again, the charging / discharging device continues to maintain a state incapable of charging. In this case, since charging of the electric vehicle is interrupted in the way that the user does not want, the charging rate of the storage battery becomes insufficient.

  In addition, the conventional charging / discharging device automatically stops the charging sequence when an abnormality occurs during the charging sequence for charging the electric vehicle. Thereafter, unless the user operates the charging / discharging device again to instruct the start of the charging operation of the electric vehicle, the charging / discharging device continues to maintain a state incapable of charging. In this case, since the storage battery is not charged at all, the charge rate of the storage battery becomes insufficient.

  In addition, the conventional charging / discharging device is periodically notified of the charging rate of the storage battery calculated by the electric vehicle from the electric vehicle during charging of the electric vehicle. The conventional charging / discharging device automatically stops charging the electric vehicle when the notified charging rate reaches a target charging rate preset in the charging / discharging device during charging of the electric vehicle.

  However, the calculation of the charging rate of the storage battery by the electric vehicle may not always be accurate. Specifically, a value higher than the actual charging rate may be calculated depending on conditions and notified to the charging / discharging device. Specifically, the calculation result of the charging rate may differ from the actual charging rate depending on whether or not the storage battery is being charged or discharged, or the temperature of the storage battery. In this case, the charging / discharging device stops charging the electric vehicle because the charging rate of the electric vehicle has reached the target charging rate even though the actual charging rate of the storage battery has not reached the target charging rate. It will be. Thereby, the problem that the charging rate of a storage battery becomes inadequate arises.

  In addition, the conventional charging / discharging device automatically stops charging the electric vehicle when a third party depresses the stop button of the charging / discharging device while charging the electric vehicle. In this case, unless the user operates the charging / discharging device to instruct charging of the electric vehicle again, the charging / discharging device continues to maintain an unchargeable state. In this case, charging of the electric vehicle is interrupted in a manner not desired by the user, which causes a problem that the charging rate of the storage battery becomes insufficient.

  The above problem may also occur when the charging / discharging device discharges the storage battery of the electric vehicle.

  The present invention has been made to solve the above problems. And the objective is to implement | achieve the electric power control apparatus which can make the charging rate of the storage battery of a vehicle close | similar to a target charging rate.

  In order to solve the above-described problem, a power control device according to aspect 1 of the present invention is a power control device that charges or discharges a storage battery mounted on a vehicle, and performs power control that charges or discharges the storage battery. A determination unit for determining whether an abnormality has occurred while the power control unit is executing a series of processing procedures for charging or discharging the storage battery, and determining that the abnormality has occurred In this case, the power control unit includes a restarting unit that terminates the series of processing steps being executed by the power control unit, and then restarts the power control unit.

  According to the above configuration, the power control device performs a series of operations for charging or discharging when an abnormality occurs during a series of processing procedures for performing charging or discharging of a storage battery mounted on the vehicle. Start the procedure again. Thereafter, if no abnormality occurs, the power control device can normally charge or discharge the storage battery of the vehicle. As a result, even if the charging or discharging of the storage battery does not reach the target charging rate because charging or discharging of the storage battery is not started or interrupted due to the occurrence of an abnormality, charging or discharging of the storage battery is performed again. Since this can be expected, it can be expected that the charging rate of the storage battery will be closer to the target charging rate.

  As described above, the power control apparatus can bring the charging rate of the storage battery of the vehicle closer to the target charging rate.

  In the power control device according to aspect 2 of the present invention, in the above aspect 1, when the restarting unit determines that the abnormality has occurred while the power control unit is performing charging or discharging of the storage battery, Causing the power control unit to stop charging or discharging the storage battery, and then ending the series of processing steps being executed to the power control unit, and then causing the power control unit to start the series of processing steps again. It is a feature.

  According to the above configuration, after charging or discharging of the storage battery is interrupted due to the occurrence of an abnormality, charging or discharging is resumed unless an abnormality occurs again, so that the state of insufficient charging or discharging of the storage battery is maintained. Can be prevented.

  In the power control device according to aspect 3 of the present invention, in the aspect 1 or 2, the restart unit determines that the abnormality has occurred before the charging or discharging is started during the execution of the series of processing procedures. In this case, the power control unit terminates the series of processing procedures being executed, and then causes the power control unit to restart the series of processing procedures.

  According to the above configuration, after the execution of a series of processing steps for charging or discharging the storage battery is stopped due to the occurrence of an abnormality, if the abnormality does not occur again, the series of processing steps are newly executed. Therefore, it is possible to prevent the state where the storage battery is not charged or discharged at all.

  The power control device according to aspect 4 of the present invention is the power control apparatus according to any one of the aspects 1 to 3, wherein the restarting unit performs the series of processing procedures again to the power control unit when it is determined that the abnormality has occurred. It is characterized by waiting for a specified time before starting.

  According to the above configuration, it is expected that the abnormality that has occurred can be naturally resolved before resuming a series of processing procedures. Therefore, there is a possibility that the storage battery can be charged or discharged without any abnormality after resumption. Get higher.

  In the power control device according to aspect 5 of the present invention, in the above aspect 4, when the resuming unit determines that the abnormality has repeatedly occurred, the power control device waits for a longer specified time as the number of occurrences increases. It is said.

  According to the above configuration, it is better to expect that the abnormality that has occurred will be resolved naturally before resuming a series of processing procedures for charging or discharging. The possibility that the storage battery can be charged or discharged without increasing becomes higher.

  The power control device according to aspect 6 of the present invention is the power control apparatus according to any one of the aspects 1 to 4, wherein the restart unit determines that the abnormality has repeatedly occurred a predetermined number of times, The processing procedure is not restarted.

  According to the above configuration, when the abnormality occurs repeatedly for a specified number of times, the power control device does not charge or discharge the storage battery by not restarting the series of processing procedures any more. Even if a minor abnormality occurs repeatedly, it is likely that the abnormality will not be resolved even if the power control unit is restarted or a series of processing procedures is restarted, or these abnormalities are serious. It is assumed that there is a high possibility of causing a serious problem. Therefore, according to the above configuration, it is possible to prevent the unsuccessful resuming process from being repeated unnecessarily or a dangerous situation from occurring.

  The power control device according to aspect 7 of the present invention further includes an abnormality occurrence notifying unit that notifies that the abnormality has occurred when it is determined in any of the aspects 1 to 6 that the abnormality has repeatedly occurred. It is characterized by having.

  According to said structure, the user can take an appropriate response | compatibility according to the content of the notified abnormality.

  The power control device according to aspect 8 of the present invention is the power control device according to any one of the above aspects 1 to 7, wherein the abnormality is an abnormality in a control system, an input / output system, a communication system, or a weak electric system in the power control device, and the power control unit. Is at least one of an abnormality when communicating with the vehicle and an abnormality of an inspection system before charging or discharging of the vehicle is started.

  According to the above configuration, these abnormalities are minor and are often resolved naturally. Therefore, no abnormalities occur after resuming a series of processing procedures, and the power control unit operates the vehicle storage battery normally. There is a high possibility that the battery can be charged or discharged.

  In order to solve the above-described problem, a power control device according to aspect 9 of the present invention is a power control device that charges or discharges a storage battery mounted on a vehicle, and performs power control that charges or discharges the storage battery. And the operation unit for stopping the operation of the power control device, and whether or not the operation unit is pressed while the power control unit is executing a series of processing procedures for charging or discharging the storage battery. When it is determined that the determination unit and the operation unit have been pressed, the power control unit terminates a series of processing procedures being executed, and when a predetermined time has passed, And a restarting unit that restarts the power control unit.

  According to the above configuration, in the power control device, the operation unit for stopping the operation of the power control device is pressed during the execution of a series of processing procedures for charging or discharging the storage battery mounted on the vehicle. Thereafter, when a predetermined time elapses, a series of processing procedures for charging or discharging is started again. Thereafter, if the operation unit is not pressed again, the power control device can normally charge or discharge the storage battery of the vehicle. Thereby, since the third party pressed the operation unit of the power control device by mischief, after charging or discharging was interrupted while the charging rate of the storage battery was insufficient, charging or discharging of the storage battery is performed again, The charging rate of the storage battery can be further increased.

  As described above, the power control apparatus can bring the charging rate of the storage battery of the vehicle closer to the target charging rate.

  A power control apparatus according to aspect 10 of the present invention is the power control apparatus according to aspect 9, wherein a cable for charging or discharging the storage battery, a connector provided at one end of the cable, connected to the vehicle, and the cable And a connection confirmation line for confirming the connection between the vehicle and the connector, and the restarting unit terminates a series of processing procedures being executed by the power control unit, and then defines When it is detected that the connection confirmation line is not conducting before the time elapses, the power control unit does not restart the series of processing procedures.

  According to said structure, possibility that a series of processing procedures for charge or discharge can be restarted normally can be made high.

  In order to solve the above-described problem, a power control device according to an aspect 11 of the present invention is a power control device that charges or discharges a storage battery mounted on a vehicle, and performs power control that charges or discharges the storage battery. And a determination unit for determining whether or not a charge rate of the storage battery has reached a specified value while the power control unit is executing a series of processing procedures for charging or discharging the storage battery, and the storage battery When the charging rate is determined to have reached a specified value, the power control unit terminates a series of processing procedures being executed, and then a restarting unit that causes the power control unit to restart the series of processing procedures. It is characterized by having.

  According to the above configuration, when the power control device determines that the charging rate of the storage battery has reached the specified value during the execution of a series of processing procedures for charging or discharging the storage battery mounted on the vehicle, The charging or discharging of the storage battery is stopped, and then a series of processing procedures is started again. Thereafter, when it is determined that the charging rate of the storage battery has not reached the specified value, the power control device can charge or discharge the storage battery of the vehicle again.

  As a result, the charging rate of the storage battery notified from the vehicle is lower or higher than the actual value, so that the charging or discharging was interrupted even though the actual charging rate of the storage battery did not reach the specified value. Thereafter, the storage battery is charged or discharged again. Thereby, the charge rate of a storage battery can be raised more.

  As described above, the power control apparatus can bring the charging rate of the storage battery of the vehicle closer to the target charging rate.

  In the power control device according to aspect 12 of the present invention, in the above aspect 11, the resuming unit causes the power control unit to restart the series of processing procedures a predetermined number of times, and then the charging rate of the storage battery is defined. When it is determined that the value has been reached, the power control unit is not allowed to restart the series of processing procedures.

  According to said structure, it can prevent that a series of processing procedures for charge or discharge are repeated unnecessarily.

  In the power control device according to aspect 13 of the present invention, in the above aspect 11 or 12, the resuming unit causes the power control unit to end the series of processing procedures, and when a predetermined time has elapsed, the power control unit The above-described series of processing procedures is restarted.

  According to said structure, since it can anticipate having the charging rate of the storage battery notified from a vehicle approaching an actual value, the charging rate of the storage battery of a vehicle can be brought closer to a target charging rate.

  The power control device according to aspect 14 of the present invention is the power control apparatus according to any one of the aspects 1 to 13, wherein when the resuming unit causes the power control unit to restart a series of processing procedures, charging or discharging of the storage battery resumes. It is further characterized by further comprising a restart notifying unit for notifying that it is being performed.

  According to said structure, the user can grasp | ascertain that charge or discharge of the storage battery of the vehicle was restarted for some reason.

  According to one aspect of the present invention, there is an effect that the charging rate of the storage battery of the vehicle can be made closer to the target charging rate.

It is a figure which shows the structure of the charging / discharging apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the flow of a process when the charging / discharging apparatus which concerns on Embodiment 1 of this invention performs a charge driving | operation. It is a flowchart which shows the flow of a process when the charging / discharging apparatus which concerns on Embodiment 1 of this invention performs a reservation driving | operation. It is a flowchart which shows the flow of a process when the charging / discharging apparatus which concerns on Embodiment 2 of this invention performs a charge driving | operation. It is a flowchart which shows the flow of the other process in which the charging / discharging apparatus which concerns on Embodiment 2 of this invention performs a reservation driving | operation. It is a figure which shows the structure of the charging / discharging apparatus which concerns on Embodiment 3 of this invention. It is a flowchart which shows the flow of a process when the charging / discharging apparatus which concerns on Embodiment 3 of this invention performs a charge driving | operation. It is a flowchart which shows the flow of a process when the charging / discharging apparatus which concerns on Embodiment 3 of this invention performs a reservation driving | operation. It is a figure which shows the structure of the charging / discharging apparatus which concerns on Embodiment 4 of this invention. It is a flowchart which shows the flow of a process when the charging / discharging apparatus which concerns on Embodiment 4 of this invention performs a charge driving | operation. It is a flowchart which shows the flow of a process when the charging / discharging apparatus which concerns on Embodiment 4 of this invention performs a reservation driving | operation.

Embodiment 1
Embodiment 1 according to the present invention will be described below with reference to FIGS.

(Configuration of charging / discharging device 1)
FIG. 1 is a diagram showing a configuration of a charge / discharge device 1 according to Embodiment 1 of the present invention. As shown in this figure, the charging / discharging device 1 (power control device) includes an input device 11 (operation unit), an input unit 12 (detection unit, reception unit), a display panel 13 and a display unit 14 (resumption notification unit, abnormality). Occurrence notification unit), control circuit 15, transformer 16, charge / discharge circuit 17 (power control unit), charge / discharge cable 18 (cable), charge / discharge connector 19 (connector), reserved operation control unit 20, abnormality determination unit 21 (determination) Section) and a restart control section 22 (resume section).

  The charging / discharging device 1 is used for both charging from a commercial power system 4 to a storage battery mounted on an electric vehicle 2 (vehicle) and supplying power from the storage battery of the electric vehicle 2 to each load 32 in the building 3. . Usually, the charging / discharging device 1 is installed outside the building 3 (in a garage or the like). In the present embodiment, the charging / discharging device 1 is a device that can charge / discharge the electric vehicle 2 and is compatible with, for example, the CHAdeMO (registered trademark) standard. Similarly, the electric vehicle 2 is an electric vehicle corresponding to the CHAdeMO standard, for example.

  The building 3 is a building used for a person to perform various activities such as life or labor inside, such as a house, a store, an office building, or a factory. Commercial AC power having a specified voltage (100 V / 200 V) is supplied from the commercial power system 4 into the building 3. This AC power is supplied to each load 32 (lighting device, home appliance, electronic device, etc.) in the building 3 through the distribution board 31 in the building 3. Each load 32 operates using supplied power (or DC power converted therefrom).

  The charging / discharging device 1 is connected to the secondary side (downstream) of the distribution board 31 in the building 3 via an AC power line. When the commercial AC power is normally supplied into the building 3, the charging / discharging device 1 can be supplied with this AC power through the distribution board 31. The charging / discharging device 1 uses, as a control power source for the charging / discharging device 1, commercial AC power supplied to the charging / discharging device 1 from the commercial power system 4 via the distribution board 31. The control power supply is a power supply for obtaining a control power of a predetermined voltage (for example, 12V) necessary for the activation and subsequent operation of the charging / discharging device 1.

  The input device 11 is a device used by a user to operate the charging / discharging device 1 or inputting information to the charging / discharging device 1. For example, it is implemented as various buttons or switches. The input device 11 may be a touch panel. The input device 11 includes at least a start button and a stop button (operation unit).

  The start button is a kind of button for controlling the operation of the charging / discharging device 1, and more specifically, is a button for starting the operation. If the user presses the start button while the charging / discharging device 1 is stopped, the charging / discharging device 1 starts a set type of operation (charging operation, independent operation, or grid interconnection operation).

  The stop button is a kind of button for controlling the operation of the charging / discharging device 1, and more specifically, is a button for causing the charging / discharging device 1 to stop the current operation. If the user presses the stop button, the charging / discharging device 1 stops the operation currently being executed, and then shifts to a standby state.

  The input unit 12 receives various inputs (operations) by the user with respect to the input device 11.

  The display panel 13 is a device for displaying various information, and is realized as a liquid crystal display panel, for example.

  The display unit 14 displays the information on the display panel 13 by outputting various types of information for display to the display panel 13.

  The control circuit 15 comprehensively controls the operation (charging, discharging) of the charging / discharging device 1. In the present embodiment, a reserved operation control unit 20, an abnormality determination unit 21, and a restart control unit 22 are provided in the control circuit 15.

  The transformer 16 converts the supplied AC power into AC power having another specified voltage. Note that the charging / discharging device 1 may have a configuration in which the charging / discharging circuit 17 has an insulating portion from the AC power line, and the insulating portion functions as a transformer. In this case, the transformer 16 is not necessary for the charge / discharge device 1.

  The charging / discharging circuit 17 charges a storage battery of the electric vehicle 2 by performing a prescribed procedure (charging sequence or discharging sequence) between the charging / discharging device 1 and the electric vehicle 2, or a storage battery of the electric vehicle 2. The power is supplied into the building 3 by discharging the power stored in the building 3. The charge / discharge circuit 17 executes, for example, a charge sequence or a discharge sequence corresponding to the CHAdeMO standard.

  The charge / discharge cable 18 is a cable that can charge and discharge the electric vehicle 2 and that is compatible with, for example, the CHAdeMO standard. As shown in FIG. 1, one end of the charge / discharge cable 18 is connected to the main body of the charge / discharge device 1. The charge / discharge cable 18 includes a power line 18a and a signal line 18b. In the figure, only one power line 18a and one signal line 18b are shown for the sake of simplicity, but in reality, there are two power lines 18a (positive power line and negative electrode line) in the charge / discharge cable 18. Power lines) and a plurality of signal lines 18b. Two of the plurality of signal lines 18b are signal lines capable of bidirectional communication for transmitting / receiving various signals between the charge / discharge circuit 17 and the electric vehicle 2 by CAN (Controller Area Network) communication. It is. The rest is for transmitting a specific signal such as a charge start signal, a charge permission signal, or a charge prohibition signal from the charge / discharge circuit 17 to the electric vehicle 2 or from the electric vehicle 2 to the charge / discharge circuit 17. This is a signal line (control line) capable of only one-way communication.

  In the charge / discharge cable 18, a connection confirmation line (not shown) for confirming physical connection (fitting) between the charge / discharge connector 19 and the electric vehicle 2 is further provided. When the charge / discharge connector 19 is correctly connected to the electric vehicle 2, the connection confirmation line is conductive. On the other hand, when the charge / discharge connector 19 is not correctly connected to the electric vehicle 2, the connection confirmation line is not conductive. The charging / discharging device 1 can determine whether or not the charging / discharging connector 19 is connected to the electric vehicle 2 by confirming whether or not the connection confirmation line is conductive.

  The charging / discharging connector 19 is a connector that can charge / discharge the electric vehicle 2 and is compatible with, for example, the CHAdeMO standard. As shown in FIG. 1, the charge / discharge connector 19 is attached to the other end of the charge / discharge cable 18. The charge / discharge connector 19 is connected to a charge / discharge port provided in the electric vehicle 2. When the charging / discharging connector 19 is connected to the charging / discharging port and a prescribed procedure (charging sequence or discharging sequence) between the charging / discharging device 1 and the electric vehicle 2 is completed, the storage battery of the electric vehicle 2 using the charging / discharging device 1 Can be charged, or the electric power stored in the storage battery of the electric vehicle 2 can be supplied into the building 3 at the time of a power failure.

  Hereinafter, charging or discharging of a storage battery mounted on the electric vehicle 2 may be simply referred to as charging or discharging of the electric vehicle 2.

  The charging / discharging connector 19 is provided with a locking mechanism, and the charging / discharging connector 19 is locked to the electric vehicle 2 by this locking mechanism for ensuring safety when the electric vehicle 2 is charged or discharged from the electric vehicle 2. Thereby, it is possible to prevent the charge / discharge connector 19 from being accidentally detached from the electric vehicle 2 during charging or discharging of the electric vehicle 2.

  The reserved operation control unit 20 controls the reserved operation in the charge / discharge device 1. Details of the reserved operation will be described later.

  The abnormality determination unit 21 determines whether or not an abnormality has occurred while the charge / discharge circuit 17 is executing a series of processing procedures for charging or discharging the electric vehicle 2. Details of this determination will be described later.

  The restart control unit 22 causes the charge / discharge circuit 17 to restart a series of processes for charging or discharging the electric vehicle 2 when an abnormality occurs. Details of the restart process will be described later.

  The charging / discharging device 1 is not limited to the electric vehicle 2 but can be driven by various types of vehicles (hybrids) in which a driving storage battery is mounted and the power in the storage battery is converted into driving force. Vehicles, plug-in hybrid vehicles, fuel cell vehicles, etc.).

  The charging / discharging device 1 can perform various operations related to charging or discharging of the electric vehicle 2 (charging operation, independent operation, grid interconnection operation, reservation operation, etc.). Below, the outline | summary of each driving | operation which the charging / discharging apparatus 1 can perform is demonstrated.

(Charging operation)
The charging operation is an operation mode when the charging / discharging device 1 charges the storage battery of the electric vehicle 2. During the charging operation, AC power is supplied from the building 3 to the transformer 16 of the charging / discharging device 1. The transformer 16 converts the supplied AC power into AC power having other specified voltage, and supplies the converted AC power to the charge / discharge circuit 17. The charge / discharge circuit 17 converts the AC power supplied from the transformer 16 into DC power having a specified voltage (for example, 400 V) suitable for charging the electric vehicle 2, and connects the converted DC power to the electric vehicle 2. The power is supplied to the electric vehicle 2 through the power line 18 a and the charge / discharge connector 19 in the charge / discharge cable 18. Thereby, the storage battery in the electric vehicle 2 is charged.

(Independent operation)
Independent operation is an operation mode in which the charging / discharging device 1 extracts DC power from the storage battery of the electric vehicle 2 and converts it into AC power and supplies it to the building 3 at the time of a power failure. When a power failure occurs, AC power is no longer supplied from the commercial power system 4 into the building 3. The charging / discharging device 1 takes out the electric power stored in the storage battery in the electric vehicle 2 in order to supply electric power to the building 3 from an electric power supply source other than the commercial power system 4 at the time of a power failure, and uses this as an AC for the building 3 It can be converted into electric power and supplied to the building 3. During the self-sustaining operation of the charging / discharging device 1, the circuit breaker in the distribution board has a role of electrically disconnecting the charging / discharging device from the commercial power system 4 (preventing color mixing).

  The charging / discharging device 1 starts a self-sustained operation by driving a power supply circuit (not shown) using electric power of a battery (not shown) in the charging / discharging device 1. After that, when the electric power taken out from the storage battery is converted into AC power and started to be supplied to the power system in the building 3, the independent operation is continued by driving the power supply circuit with the AC power.

  During the self-sustained operation, the charge / discharge circuit 17 extracts DC power of a specified voltage (for example, 400 V) from the storage battery in the electric vehicle 2 through the charge / discharge cable 18. The charge / discharge circuit 17 converts the DC power extracted from the electric vehicle 2 into AC power having a predetermined voltage and supplies the AC power to the transformer 16. The transformer 16 converts the supplied AC power into AC power having a specified voltage (for example, 100 V or 200 V) that can be used in the building 3, and passes through a power line for AC power that connects the transformer 16 and the distribution board 31. To the secondary side of the distribution board 31 in the building 3. The AC power thus supplied from the charging / discharging device 1 to the building 3 is supplied to each load 32 via the secondary side of the distribution board 31. Each load 32 operates using AC power supplied from the charging / discharging device 1.

(System interconnection operation)
The charging / discharging device 1 can also convert the electric power stored in the storage battery of the electric vehicle 2 into the specified AC power and supply it to the building where the distribution board 31 is provided even when there is no power failure. At this time, AC power is supplied to the distribution board 31 from both the commercial power system 4 and the charge / discharge device 1. The operation state of the charging / discharging device 1 when the AC power supply in such a manner is performed on the building 3 is particularly referred to as grid interconnection operation.

(Reserved driving)
The charge / discharge device 1 can immediately start the charge operation or the grid interconnection operation when receiving an operation start instruction from the user. On the other hand, when the predetermined start condition preset in the charge / discharge device 1 is satisfied, the charge / discharge circuit 17 starts the charge sequence or the discharge sequence, and the preset in the charge / discharge device 1 The charging operation or the grid interconnection operation for causing the charging / discharging circuit 17 to stop the charging sequence or the discharging sequence can also be executed when the end condition is satisfied. The operation mode in which the start and end of the charge sequence or the discharge sequence are controlled based on the establishment of such a start condition and an end condition is hereinafter referred to as a reserved operation.

  For example, since the user causes the discharge device 1 to execute the reserved operation, the user can set the discharge device 1 in advance with a time zone for executing the reserved operation. When there is this setting, the charging / discharging device 1 automatically executes a specified type of operation (charging operation or grid interconnection operation) in the set time zone.

  By performing such a reserved operation, the user of the charging / discharging device 1 enjoys the following benefits. For example, the user can use the fully charged electric vehicle 2 immediately after getting up by causing the charging / discharging device 1 to execute a reserved operation of the electric vehicle 2 at midnight while sleeping. Therefore, the user does not need to wait until the electric vehicle 2 is fully charged after getting up.

  Further, depending on the contents of the power contract, the following advantages can be obtained by the reserved operation. That is, the user causes the charging / discharging device 1 to charge the electric vehicle 2 at midnight, which is a time zone where the electricity rate is cheap, while the grid charging operation is performed on the charging / discharging device 1 in the daytime where the electricity rate is high. Can be executed. Thereby, the household electricity bill which a user bears can be reduced.

  Note that the reserved driving mode is not limited to that based on the setting of the time zone described above. In addition, for example, when the charging / discharging device 1 includes a plurality of charging / discharging cables 18 and charging / discharging connectors 19 and a plurality of different electric vehicles 2 can be connected to the charging / discharging device 1 for charging through the charging / discharging devices 1 The mode in which the apparatus 1 sets the order for charging each electric vehicle 2 and sequentially charges the electric vehicles 2 that have arrived at the charging order is also included in the category of reserved operation. In this aspect, the arrival of the charging order set for an electric vehicle 2 corresponds to the establishment of a start condition for starting a reserved operation.

  The charging / discharging device 1 according to the present embodiment has an advantage that the charging rate of the storage battery of the electric vehicle 2 can be made closer to a preset target charging rate (specified value). A specific method for realizing this will be described in detail below.

(Processing flow for charging operation)
FIG. 2 is a flowchart showing a flow of processing when the charging / discharging device 1 according to Embodiment 1 of the present invention performs a charging operation. Hereinafter, the case where the charging / discharging device 1 executes the charging operation will be described as an example. However, when the discharging operation (that is, the self-sustained operation or the grid interconnection operation) is performed, only the charging is changed to discharging. There is no essential difference in the flow.

  When the user wants the charging / discharging device 1 to perform the charging operation, first, the charging / discharging connector 19 of the charging / discharging device 1 is connected to a dedicated charging port provided in the electric vehicle 2 (S1).

  Thereafter, the user operates the input device 11 to select an operation mode to be executed by the charge / discharge device 1. If the operation mode has already been selected, or if the operation mode is determined only by a signal from the input device 11, this selection operation is not necessary. Here, “charging operation” is selected. Upon detecting this selection, the input unit 12 sets the charging operation to the charging / discharging device 1 as an operation mode to be executed by the charging / discharging device 1. The user further operates the input device 11 to input a target charging rate desired to reach the storage battery of the electric vehicle 2. For example, when it is desired to fully charge the storage battery, the user inputs 100% as the target charging rate. In addition, for example, when it is desired to charge the storage battery to a certain charging rate, a value smaller than 100%, such as 80% or 90%, is input as the target charging rate. The input unit 12 detects the input value, and sets the detected value in the charging / discharging device 1 as a target charging rate of the storage battery when the charging / discharging circuit 17 charges the electric vehicle 2. Note that this input operation is not necessarily required when the target charging rate has been set in advance.

  Next, the user presses a start button provided in the input device 11 of the charging / discharging device 1 (S2). The input unit 12 detects this pressing operation. Since the setting related to the charging operation is made in the charging / discharging device 1, the input unit 12 receives an instruction to start the charging operation for the charging / discharging device 1 from the user based on this detection.

  The input unit 12 notifies the charge / discharge circuit 17 that a charge operation start instruction has been accepted. Upon receiving this notification, the charge / discharge circuit 17 immediately starts a charge sequence (S3). The charging sequence means a series of processing procedures for charging the electric vehicle 2. In the present embodiment, the charging / discharging circuit 17 starts a charging sequence based on the CHAdeMO (registered trademark) standard for rapid charging of an electric vehicle or the like.

(Charge sequence flow)
A flow of a charging sequence performed between the charging / discharging circuit 17 and the electric vehicle 2 will be described. After the start of the charging sequence, first, the charging / discharging circuit 17 transmits a charging start signal to the electric vehicle 2 through a dedicated signal line 18b for transmitting the charging start. When the electric vehicle 2 receives the charging start signal, the electric vehicle 2 recognizes that the charging operation by the charging / discharging device 1 has started, and transmits parameters such as the maximum voltage and capacity of the storage battery via the CAN communication signal line 18b. To the charge / discharge circuit 17.

  Based on the parameters received from the electric vehicle 2, the charge / discharge circuit 17 confirms whether or not the electric vehicle 2 is an electric vehicle 2 that can be charged by the charge / discharge device 1. If confirmed, the charging / discharging circuit 17 transmits parameters such as the maximum output voltage and the maximum output current of the charging / discharging device 1 to the electric vehicle 2 by CAN communication. The electric vehicle 2 determines whether or not there is compatibility with the electric vehicle 2 based on the received parameters. If there is no problem, the electric vehicle 2 transmits a charging permission signal to the charging / discharging device 1 through a dedicated signal line 18b for transmitting permission of charging. To do.

  When the charging / discharging device 1 receives the charging start signal, the charging / discharging device 1 understands that the electric vehicle 2 permits charging, locks the charging / discharging connector 19, and then supplies an electric current to the electric vehicle 2. Test for abnormalities such as short circuit or ground fault. If there is no abnormality, the charging / discharging circuit 17 transmits a charging start signal to the electric vehicle 2 through a dedicated signal line 18b for notifying that all preparations on the charging / discharging device 1 side have been completed. This completes preparation for charging. Thereafter, charging of the storage battery by the control on the electric vehicle 2 side is started.

  The charging / discharging circuit 17 sequentially executes a series of processing procedures included in the charging sequence after the start of the charging sequence. And if the charge permission signal is received from the electric vehicle 2, the charge / discharge connector 19 is locked to the electric vehicle 2 (S4). Thereafter, the charge / discharge circuit 17 sequentially proceeds with the remaining processing steps included in the charge sequence. The charging / discharging circuit 17 completes preparation for charging when the charging start signal for transmitting that all the preparations of the charging / discharging device 1 are completed is transmitted to the electric vehicle 2 (S5). Thereby, the charging / discharging circuit 17 will be in the state which can charge the electric vehicle 2. FIG. Thereafter, the charge / discharge circuit 17 starts charging (current supply) of the storage battery of the electric vehicle 2 (S6).

  In addition, the charging / discharging apparatus 1 complete | finishes the charge sequence in process, when some abnormality generate | occur | produces after a charge sequence is started until charge preparation is completed. Thereby, the process of FIG. 2 ends.

  After the start of charging, the input unit 12 detects whether or not the stop button provided in the input device 11 has been pressed, and determines whether or not the stop button has been pressed based on the result (S7). When S7 is NO, the abnormality determination unit 21 determines whether a serious abnormality has occurred during charging of the electric vehicle 2 (S8). The serious abnormality here is an abnormality that has a relatively high possibility of leading to a dangerous accident such as a fire or an electric shock. For example, the emergency stop of the charging / discharging device 1 or the strong electric system (power) of the charging / discharging device 1 Or abnormalities in the inspection system (ground fault, short circuit) of the charging / discharging device 1 during charging.

  If S8 is NO, the charging / discharging circuit 17 next determines whether or not a minor abnormality has occurred (S9). The minor abnormality here is an abnormality that is relatively unlikely to lead to a dangerous accident such as a fire or an electric shock. For example, a control system, an input / output system, a communication system, or a weak electric power in the charging / discharging device 1 is used. An abnormality of the system or an abnormality when the charge / discharge circuit 17 communicates with the electric vehicle 2 can be mentioned.

  The charging / discharging circuit 17 and the electric vehicle 2 exchange various parameters for charging by CAN communication through the signal line 18b while the electric vehicle 2 is being charged. At this time, when communication for exchanging parameters cannot be executed, the charge / discharge circuit 17 notifies the abnormality determination unit 21 to that effect. For example, the abnormality determination unit 21 determines that an abnormality has occurred when the charge / discharge circuit 17 communicates with the electric vehicle 2 based on this notification.

  When S9 is NO, the charge / discharge circuit 17 determines whether the charge rate of the storage battery periodically notified from the electric vehicle 2 has reached the target charge rate set in the charge / discharge device 1 ( S10).

  When S10 is NO, the process shown in FIG. 2 returns to S7. Therefore, when no abnormality occurs during charging, the stop button is not pressed, and the charging rate of the storage battery does not reach the target charging rate, the charging / discharging circuit 17 continues to charge the electric vehicle 2.

(Forced termination of charging operation)
On the other hand, if S7 is YES, the input unit 12 notifies the control circuit 15 that the stop button has been pressed. Upon receiving this notification, the control circuit 15 instructs the charge / discharge circuit 17 to stop charging the electric vehicle 2. Upon receiving this instruction, the charge / discharge circuit 17 stops charging the electric vehicle 2 (S11). The charge / discharge circuit 17 starts an end procedure for ending the charge sequence after stopping the charge. The charge / discharge circuit 17 advances the termination procedure to a stage where the lock of the charge / discharge connector 19 can be released, and then releases the lock of the charge / discharge connector 19 (S12). Thereafter, the charging / discharging circuit 17 ends the charging sequence (S13). Thereby, the process shown in FIG. 2 is completed.

  When S8 is YES, the abnormality determination unit 21 instructs the charge / discharge circuit 17 to stop charging the electric vehicle 2. In response to this instruction, the charge / discharge circuit 17 stops charging the electric vehicle 2 (S11). Subsequent processing is the same as the above-described example. Moreover, also when S10 is YES, the charging / discharging circuit 17 stops charge of the electric vehicle 2 (S11). Subsequent processing is the same as the above-described example.

  On the other hand, if S9 is YES, that is, if it is determined that a minor abnormality has occurred during charging of the electric vehicle 2, the abnormality determination unit 21 notifies the restart control unit 22 to that effect. The abnormality determination unit 21 also notifies the restart control unit 22 of the content of the abnormality that has occurred. The restart control unit 22 records the notified abnormality content in a storage unit (not shown) as a history of occurrence of the abnormality. In addition, the restart control unit 22 instructs the charge / discharge circuit 17 to end the current charge sequence.

  Upon receiving this instruction, the charge / discharge circuit 17 stops charging the electric vehicle 2 (S14). After charging is stopped, the charge / discharge circuit 17 starts an end procedure for ending the charge sequence. However, the charge / discharge circuit 17 proceeds with the end procedure until the lock of the charge / discharge connector 19 can be released, and then maintains the charge / discharge connector 19 without releasing the lock (S15). Thereafter, the charge / discharge circuit 17 ends the charge sequence while maintaining the lock of the charge / discharge connector 19 (S16). Thereby, the charging operation of the charging / discharging device 1 is once ended.

  When the charging / discharging circuit 17 ends the charging sequence, the charging / discharging circuit 17 notifies the restart control unit 22 to that effect. In response to this notification, the resumption control unit 22 refers to the history of the storage unit to determine whether or not a minor abnormality has repeatedly occurred a prescribed number of times (here, 3 times) (S17). If S17 is YES, the process shown in FIG. 2 ends. That is, the charging / discharging device 1 restarts the charging sequence of the electric vehicle 2 when a minor abnormality repeatedly occurs a predetermined number of times (all may be the same abnormality or different abnormality). To avoid. When S17 is YES, the charge / discharge circuit 17 may release the lock of the charge / discharge connector 19 immediately (automatically), or after that, when the pressing operation of the stop button is detected. Also good.

  If the abnormality determination unit 21 determines that the abnormality has repeatedly occurred a prescribed number of times, the abnormality determination unit 21 may instruct the display unit 14 to display a message notifying the user that the abnormality has occurred. By displaying this message on the display panel 13, the user can take an appropriate action according to the notified content of the abnormality.

(Resumption of charging operation)
On the other hand, when S17 is NO, the restart control unit 22 notifies the display unit 14 that charging of the electric vehicle 2 is restarted. Upon receiving this notification, the display unit 14 displays a message on the display panel 13 for notifying the user that the charging / discharging device 1 is resuming charging of the electric vehicle 2 (S18). Accordingly, the user can grasp that charging of the electric vehicle 2 has been resumed for some reason. The charging / discharging device 1 may cause a light emitting unit (such as a light emitting diode element) indicating that charging is being resumed to emit light instead of displaying a message on the display panel 13.

  After S18, the restart control unit 22 instructs the charge / discharge circuit 17 to restart the charge sequence. In response to this instruction, the process of FIG. 2 returns to S3, and the charge / discharge circuit 17 starts the charge sequence again (S3). Thereafter, the processes of S4 and subsequent steps are sequentially executed, whereby charging of the storage battery of the electric vehicle 2 is resumed. In addition, since the charging / discharging connector 19 is already locked when the charging sequence is restarted, the locking of the charging / discharging connector 19 in S4 is not necessarily required. The charging / discharging circuit 17 may lock the charging / discharging connector 19 again when the processing procedure is advanced to a stage where the charging / discharging connector 19 can be locked after resuming the charging sequence, or add any locking of the charging / discharging connector 19. There is no need to control (lock maintenance).

  As described above, when an abnormality occurs during the execution of the charging sequence, the charging / discharging device 1 ends the charging sequence being executed, and then starts the charging sequence again. Thereafter, if no abnormality occurs, the charging / discharging device 1 can normally charge or discharge the storage battery of the electric vehicle 2. As a result, even if the charging rate of the storage battery does not reach the target charging rate because charging or discharging of the storage battery is not started or interrupted due to the occurrence of an abnormality, the charging or discharging of the storage battery is performed again. Therefore, it can be expected that the charging rate of the storage battery is closer to the target charging rate.

  Moreover, the charging / discharging apparatus 1 does not restart a charging sequence, when it determines with abnormality having generate | occur | produced repeatedly only the specified number of times. Thereby, the charging / discharging apparatus 1 will be in the state which does not charge or discharge a storage battery by not restarting a charge sequence any more, when abnormality generate | occur | produces only the specified number of times. If an abnormality occurs repeatedly, it is highly likely that the abnormality will not be resolved even if the power control device is restarted or a series of processing steps is restarted, or the abnormality may cause a serious problem. It is expected to be high. Therefore, according to the above configuration, it is possible to prevent an unsuccessful charging sequence from being repeated unnecessarily or a dangerous situation from occurring.

  When it is determined that a minor abnormality has occurred, the restart control unit 22 may wait for a specified time until the charge sequence is restarted by the charge / discharge circuit 17. Thereby, since it can be expected that the abnormality that has occurred is naturally resolved before resuming the charging sequence, there is a high possibility that the battery can be charged or discharged without any abnormality after the resumption.

  Further, when it is determined that the abnormality has repeatedly occurred, the restart control unit 22 may wait for a longer specified time as the number of occurrences increases. In this case, before restarting the charging sequence, it is better to expect that the abnormality that occurred will be resolved naturally, so each time you restart, there is a possibility that the storage battery can be charged or discharged without occurrence of abnormality. Get higher.

(Reserved driving process flow)
FIG. 3 is a flowchart showing the flow of processing when the charge / discharge device 1 according to Embodiment 1 of the present invention performs a reserved operation. In the following, the case where the charging / discharging device 1 performs a reserved operation for charging will be described as an example. However, when performing a reserved operation for discharging (reserved grid interconnection operation), the charge is discharged. There is no essential difference in the flow of processing.

  When the user wants the charging / discharging device 1 to execute a reserved operation, first, the charging / discharging connector 19 of the charging / discharging device 1 is connected to a dedicated charging port provided in the electric vehicle 2 (S1).

  Thereafter, the user operates the input device 11 to select an operation mode to be executed by the charge / discharge device 1. If the operation mode has already been selected, or if the operation mode is determined only by a signal from the input device 11, this selection operation is not necessary. Here, “reserved operation” is selected. When detecting this selection, the input unit 12 sets the reserved operation in the charge / discharge device 1 as the operation mode to be executed by the charge / discharge device 1. The user further operates the input device 11 to input a time period (operation reserved time period) in which the charging / discharging device 1 executes the reserved operation. Note that this input operation is not necessarily required when the time zone has been set in advance. At that time, the user inputs at least the time for starting the reserved operation and the time for ending. The input unit 12 detects these inputs and, as a result, notifies the reserved operation control unit 20 of the time zone from the input start time to the end time as the reserved operation time zone. The reserved operation control unit 20 sets the notified reserved operation time zone in the charging / discharging device 1.

  For example, when 23:00 pm is input as the start time of the reserved operation and 5:00 am is input as the end time, 6 hours from 23:00 pm to 5:00 am is set in the charge / discharge device 1 as the operation reservation time zone. The

  The user further operates the input device 11 to input a target charging rate desired to reach the storage battery of the electric vehicle 2. The details are the same as in FIG. Note that this input operation is not necessarily required when the target charging rate has been set in advance.

  Next, the user presses a start button provided in the input device 11 of the charging / discharging device 1 (S2). The input unit 12 detects this pressing operation. Since the setting related to the reserved operation is made in the charge / discharge device 1, the input unit 12 receives an instruction to start the reserved operation for the charge / discharge device 1 from the user based on this detection.

  The input unit 12 notifies the control circuit 15 that the reservation operation start instruction has been accepted. The reserved operation control unit 20 instructs the charge / discharge circuit 17 to lock the charge / discharge connector 19 based on the notification to the control circuit 15. In response to this instruction, the charge / discharge circuit 17 acquires information about the electric vehicle 2 from the electric vehicle 2 (S21). The acquisition of the information related to the electric vehicle 2 here refers to the processing until the charging / discharging circuit 17 starts the charging sequence and then the charging / discharging circuit 17 acquires the charging permission signal transmitted from the electric vehicle 2. Then, the charging sequence is terminated. The charging / discharging circuit 17 locks the charging / discharging connector 19 to the electric vehicle 2 when the information regarding the electric vehicle 2 can be normally acquired (S22).

  Thereafter, the charging / discharging device 1 continues the standby process until the start time of the reserved operation. Specifically, the input unit 12 detects whether or not a stop button provided in the input device 11 is pressed, and determines whether or not the stop button is pressed based on the result (S23). If S23 is YES, the input unit 12 notifies the control circuit 15 to that effect. Based on this notification, the control circuit 15 instructs the charge / discharge circuit 17 to unlock the charge / discharge connector 19. Based on this instruction, the charge / discharge circuit 17 unlocks the charge / discharge connector 19. (S24). Further, the reserved operation control unit 20 cancels the setting of the reserved operation set in the charge / discharge device 1 based on the notification to the control circuit 15. As a result, the process shown in FIG. 3 ends. Therefore, the charging / discharging device 1 does not execute the reserved operation.

  On the other hand, when S23 is NO, the reserved operation control unit 20 determines whether or not the current time is within the reserved operation time zone set in the charge / discharge device 1 (S25). For example, when the current time coincides with the reserved operation start time, S25 is YES. When S25 is NO, the process shown in FIG. 3 returns to S23. Therefore, the processes of S23 and S25 are repeated until S25 becomes YES. That is, after the start button is pressed, the charging / discharging device 1 stands by until the set reserved operation start time arrives.

  When S25 is YES, the reserved operation control unit 20 instructs the charge / discharge circuit 17 to start the charge sequence. In response to this instruction, the charge / discharge circuit 17 starts a charge sequence (S3). If the time when the user presses the start button is already within the reserved operation time zone, the determination result in S25 is immediately YES after S23. Therefore, after the start button is pressed, the charging / discharging device 1 immediately starts the reserved operation without waiting until the reserved operation start time comes.

  Since S3 to S13 in FIG. 3 are basically the same as S3 to S13 in FIG. 2, detailed description thereof is omitted. However, since the charging / discharging connector 19 is already locked to the electric vehicle 2, the charging / discharging circuit 17 may or may not execute the locking process of the charging / discharging connector 19 in S4 as in the case of resuming the charging sequence. Further, the processing after S10 is different from that in FIG.

  First, when S10 is NO, that is, when it is determined that the charging rate of the storage battery of the electric vehicle 2 has not reached the target charging rate, the reserved operation control unit 20 determines that the current time is the reserved operation time zone. It is determined whether it is outside (S26). Specifically, the reserved operation control unit 20 determines whether the current time is before the reserved operation start time or after the reserved operation end time. For example, when the current time coincides with the reserved operation end time, S26 becomes YES.

(Resumption of charging sequence due to abnormality)
When S26 is NO, the process shown in FIG. 3 returns to S7, and the charge / discharge circuit 17 continues to charge the electric vehicle 2. In this way, when the reserved operation is performed, as long as no abnormality occurs during charging, the stop button is not pressed, the charge rate of the storage battery does not reach the target charge rate, and the reserved operation end time does not arrive The charging / discharging circuit 17 continues to charge the electric vehicle 2.

  When S9 is YES, that is, when a slight abnormality occurs during charging of the electric vehicle 2, S14 to S18 for resuming the charging sequence are executed as in FIG. Since these processes are the same as those in FIG. 2, detailed description thereof is omitted. In the example of FIG. 3, after S20, the restart control unit 22 instructs the reserved operation control unit 20 to start the reserved operation again. Therefore, the process of FIG. 3 returns to S23. When receiving this instruction, the reserved operation control unit 20 determines whether or not the current time is within the reserved operation time zone, and if so, instructs the charge / discharge circuit 17 to start the charging sequence. . Thereby, the reserved charging of the electric vehicle 2 is resumed. In other words, even if charging of the electric vehicle 2 is stopped due to a minor abnormality, the charging sequence is not resumed if the reserved operation end time has passed.

(Normal completion of reserved operation)
On the other hand, when S10 is YES, that is, when it is determined that the charging rate of the storage battery of the electric vehicle 2 has reached the target charging rate, the charging / discharging circuit 17 stops the charging of the electric vehicle 2 (S27). After charging is stopped, the charge / discharge circuit 17 starts an end procedure for ending the charge sequence. However, the charge / discharge circuit 17 proceeds with the end procedure to a stage where the lock of the charge / discharge connector 19 can be released, and then maintains the charge / discharge connector 19 without releasing the lock (S28). Thereafter, the charge / discharge circuit 17 terminates the charge sequence while maintaining the lock of the charge / discharge connector 19 (S29). As a result, the reserved operation is temporarily terminated.

  When S10 is YES, the charge / discharge circuit 17 notifies the reserved operation control unit 20 to that effect. Upon receiving this notification, the reserved operation control unit 20 maintains the reserved operation setting. Thereafter, the processing shown in FIG. 3 returns to S23. Thus, when the charge / discharge device 1 stops the reserved operation because the charge rate of the storage battery of the electric vehicle 2 has reached the target charge rate, the charge / discharge device 1 does not charge until the next reserved operation start time arrives. The standby process is continued again while maintaining the lock of the discharge connector 19.

  Similarly, also when S26 is YES, after the process of S27-S29 is performed, the process of FIG. 3 returns to S23. Thus, even if the charging / discharging device 1 stops the reserved operation because the scheduled operation end time has arrived, the charge / discharge device 19 remains locked until the next reserved operation start time arrives. The standby process is continued again.

  As described above, the charging / discharging device 1 can bring the charging rate of the electric vehicle 2 closer to the target charging rate, similarly to the normal charging operation, even when the reservation operation is executed.

[Embodiment 2]
A second embodiment according to the present invention will be described below with reference to FIGS. The configuration of the charge / discharge device 1 according to the present embodiment is the same as that of the first embodiment. However, unlike the first embodiment, the charging / discharging device 1 according to the present embodiment restarts the charging sequence when an abnormality occurs before the charging starts during the execution of the charging sequence, not during the charging of the electric vehicle 2. .

(Processing flow for charging operation)
FIG. 4 is a flowchart showing a flow of processing when the charging / discharging device 1 according to Embodiment 2 of the present invention performs a charging operation. Hereinafter, the case where the charging / discharging device 1 executes the charging operation will be described as an example. However, even when the discharging operation (system interconnection operation) is performed, the charging is changed to discharging, and the process flow is essential. There is no difference.

  Steps S31 to S33 are the same as S1 to S3 in FIG. When the charging / discharging circuit 17 starts the charging sequence, the charging / discharging circuit 17 appropriately notifies the abnormality determining unit 21 of the result of each processing procedure. Abnormality determination unit 21 determines whether or not a serious abnormality has occurred before the start of charging during the execution of the charging sequence, based on the result notified from charging / discharging circuit 17 and the internal state of charging / discharging device 1. (S34). The serious abnormality here is an abnormality that has a relatively high possibility of leading to a dangerous accident such as a fire or an electric shock. For example, the emergency stop of the charging / discharging device 1 or the strong electric system (power) of the charging / discharging device 1 System) abnormalities.

  When S34 is YES, the abnormality determination unit 21 instructs the charge / discharge circuit 17 to end the charging sequence. In response to this instruction, the charging / discharging circuit 17 ends the charging sequence (S35). Thereafter, the process shown in FIG. 4 ends.

  On the other hand, when S34 is NO, the abnormality determination unit 21 determines whether a minor abnormality has occurred before the start of charging during the execution of the charging sequence (S36). The minor abnormality here is an abnormality that is relatively unlikely to lead to a dangerous accident such as a fire or an electric shock. For example, a control system, an input / output system, a communication system, or a weak electric power in the charging / discharging device 1 is used. An abnormality in the system, an abnormality in the inspection system (ground fault, short circuit) of the charge / discharge device 1 when the charge / discharge circuit 17 communicates with the electric vehicle 2, or an abnormality when the charge / discharge circuit 17 communicates with the electric vehicle 2 Can be mentioned.

  In the present embodiment, the charging / discharging circuit 17, for example, when communication with the electric vehicle 2 is not established or a charge permission signal is not received from the electric vehicle 2, or insulation diagnosis such as a short circuit or a ground fault is performed. When there is an abnormality sometimes, it can be determined whether or not an abnormality has occurred when the charge / discharge circuit 17 communicates with the electric vehicle 2.

  When S36 is NO, when the charge / discharge circuit 17 receives the charge permission signal from the electric vehicle 2, the charge / discharge circuit 19 locks the charge / discharge connector 19 to the electric vehicle 2 (S37). Thereafter, the charge / discharge circuit 17 sequentially proceeds with the remaining processing steps included in the charge sequence. The charging / discharging circuit 17 completes preparation for charging when transmitting a charging start signal for notifying that all the preparations of the charging / discharging device 1 are completed to the electric vehicle 2 (S38). Thereby, the charging / discharging circuit 17 will be in the state which can charge the electric vehicle 2. FIG. Thereafter, the charge / discharge circuit 17 starts charging the storage battery of the electric vehicle 2 (S39).

  Thereafter, the input unit 12 detects whether or not the stop button provided in the input device 11 has been pressed, and determines whether or not the stop button has been pressed based on the result (S40). When S40 is NO, the charging / discharging circuit 17 determines whether or not the charging rate of the storage battery periodically notified from the electric vehicle 2 has reached the target charging rate set in the charging / discharging device 1 ( S41). When S41 is NO, the process of FIG. 4 returns to S40. Therefore, when the stop button is not pressed during charging and the charging rate of the storage battery does not reach the target charging rate, the charging / discharging circuit 17 continues to charge the electric vehicle 2.

  On the other hand, if S40 is YES, the input unit 12 notifies the control circuit 15 to that effect. Upon receiving this notification, the control circuit 15 instructs the charge / discharge circuit 17 to stop charging the electric vehicle 2. In response to this instruction, the charge / discharge circuit 17 stops the charging of the electric vehicle 2 (S42). The charge / discharge circuit 17 starts an end procedure for ending the charge sequence after stopping the charge. The charge / discharge circuit 17 releases the lock of the charge / discharge connector 19 after proceeding to the end procedure until the lock of the charge / discharge connector 19 can be released (S43). Thereafter, the charging / discharging circuit 17 ends the charging sequence (S44). Thereby, the process shown in FIG. 2 is completed.

  Moreover, also when S41 is YES, the charging / discharging circuit 17 stops charge of the electric vehicle 2 (S42). Subsequent processing is the same as the above-described example. Moreover, also when some abnormality generate | occur | produces during charge of the electric vehicle 2, the charging / discharging circuit 17 stops charge of the electric vehicle 2 (S42). Subsequent processing is the same as the above-described example.

  On the other hand, if S36 is YES, that is, if it is determined that a minor abnormality has occurred before the charging is started during the execution of the charging sequence, the abnormality determination unit 21 notifies the restart control unit 22 to that effect. To do. The abnormality determination unit 21 also notifies the restart control unit 22 of the content of the abnormality that has occurred. The restart control unit 22 records the notified abnormality content in a storage unit (not shown) as a history of occurrence of the abnormality. In addition, the restart control unit 22 instructs the charge / discharge circuit 17 to end the current charge sequence.

  Upon receiving this instruction, the charge / discharge circuit 17 ends the charge sequence (S45). Thereby, the charging operation of the charging / discharging device 1 is temporarily stopped. When the charging / discharging circuit 17 ends the charging sequence, the charging / discharging circuit 17 notifies the restart control unit 22 to that effect. Upon receiving this notification, the restart control unit 22 refers to the history of the storage unit to determine whether or not a minor abnormality has occurred a prescribed number of times (here, 3 times) (S46). If S46 is YES, the process shown in FIG. 4 ends. That is, the charging / discharging device 1 avoids resuming the charging sequence when a minor abnormality repeatedly occurs a specified number of times.

  On the other hand, when S46 is NO, the restart control unit 22 notifies the display unit 14 that the charging sequence is restarted. Upon receiving this notification, the display unit 14 displays a message on the display panel 13 for notifying the user that the charging / discharging device 1 is resuming charging of the electric vehicle 2 (S47).

  After S47, the restart control unit 22 instructs the charge / discharge circuit 17 to restart the charge sequence. Upon receiving this instruction, the process of FIG. 4 returns to S33, and the charge / discharge circuit 17 starts the charging sequence again (S33). Then, a series of processes for charging the storage battery of the electric vehicle 2 is resumed by sequentially executing each step from S34.

  As described above, when an abnormality occurs before charging is started during the execution of the charging sequence, the charging / discharging device 1 ends the charging sequence being executed, and then starts the charging sequence again. Thereafter, if no abnormality occurs, the charging / discharging device 1 can normally charge or discharge the storage battery of the electric vehicle 2. As a result, even if the charging rate of the storage battery does not reach the target charging rate because charging or discharging of the storage battery is not started or interrupted due to the occurrence of an abnormality, the charging or discharging of the storage battery is performed again. Therefore, it can be expected that the charging rate of the storage battery is closer to the target charging rate.

  More specifically, the charging / discharging device 1 can normally perform the charging sequence after resumption if the abnormality does not occur again after completing the charging sequence before starting charging due to the occurrence of abnormality, It is possible to prevent the state where the storage battery is not charged or discharged at all.

(Reserved driving process flow)
FIG. 5 is a flowchart showing a process flow when the charging / discharging device 1 according to the second embodiment of the present invention performs a reserved operation. In the following, the case where the charging / discharging device 1 performs a reserved operation for charging will be described as an example. However, when performing a reserved operation for discharging (reserved grid interconnection operation), the charge is discharged. There is no essential difference in the flow of processing.

  S31 to S32 in FIG. 5 are the same as S31 to S32 in FIG. If the instruction | indication of reservation driving | operation start is received in S32, the charging / discharging circuit 17 will acquire the information regarding the electric vehicle 2 from the electric vehicle 2 (S51). Since this process is the same as S31 of FIG. 3, detailed description thereof is omitted. The charging / discharging circuit 17 locks the charging / discharging connector 19 to the electric vehicle 2 when the information regarding the electric vehicle 2 can be normally acquired (S52).

  Thereafter, the charging / discharging device 1 continues the standby process until the start time of the reserved operation. Specifically, the input unit 12 detects whether or not a stop button provided in the input device 11 is pressed, and determines whether or not the stop button is pressed based on the result (S53). If S53 is YES, the input unit 12 notifies the control circuit 15 to that effect. Based on this notification, the control circuit 15 instructs the charge / discharge circuit 17 to unlock the charge / discharge connector 19. Based on this instruction, the charge / discharge circuit 17 unlocks the charge / discharge connector 19. (S54). Further, the reserved operation control unit 20 cancels the setting of the reserved operation set in the charge / discharge device 1 based on the notification to the control circuit 15. As a result, the process shown in FIG. 5 ends. Therefore, the charging / discharging device 1 does not execute the reserved operation.

  On the other hand, when S53 is NO, the reserved operation control unit 20 determines whether or not the current time is within the reserved operation time zone set in the charge / discharge device 1 (S55). For example, when the current time coincides with the reserved operation start time, S55 becomes YES.

  If S55 is NO, the process shown in FIG. 5 returns to S53. Therefore, the processes of S53 and S55 are repeated until S53 becomes YES. That is, after the start button is pressed, the charging / discharging device 1 stands by until the set reserved operation start time arrives.

  When S55 is YES, the reserved operation control unit 20 instructs the charge / discharge circuit 17 to start the charging sequence. In response to this instruction, the charge / discharge circuit 17 starts a charge sequence (S33). If the time when the user presses the start button is already within the reserved operation time zone, the determination result in S55 is immediately YES after S53. Therefore, after the start button is pressed, the charging / discharging device 1 immediately starts the reserved operation without waiting until the reserved operation start time comes.

  5 are basically the same as S33 to S47 in FIG. 4, and thus detailed description thereof is omitted. However, since the charging / discharging connector 19 is already locked to the electric vehicle 2, the locking process of the charging / discharging connector 19 in S37 may or may not be executed as in the case of resuming the charging sequence. Further, after S47, the processing shown in FIG. 5 returns to S53. Therefore, when a minor abnormality occurs during the execution of the charging sequence, a series of processes for charging the electric vehicle 2 is resumed if the current time is the reserved driving time zone.

  In FIG. 5, the processing after S41 is different from that in FIG. Specifically, when S41 is NO, that is, when it is determined that the charging rate of the storage battery of the electric vehicle 2 has not reached the target charging rate, the reserved operation control unit 20 determines that the current time is reserved. It is determined whether or not it is outside the operation time zone (S56). Specifically, the reserved operation control unit 20 determines whether the current time is before the reserved operation start time or after the reserved operation end time. For example, when the current time coincides with the reserved operation end time, S56 becomes YES.

  When S56 is NO, the process shown in FIG. 5 returns to S40, and the charge / discharge circuit 17 continues to charge the electric vehicle 2. As described above, when the reserved operation is executed, the charge / discharge circuit 17 is not connected to the electric vehicle 2 unless the stop button is pressed, the storage battery charge rate does not reach the target charge rate, and the reserved operation end time does not arrive. Continue charging.

  On the other hand, when S41 is YES, that is, when it is determined that the charging rate of the storage battery of the electric vehicle 2 has reached the target charging rate, the charging / discharging circuit 17 stops the charging of the electric vehicle 2 (S57). After charging is stopped, the charge / discharge circuit 17 starts an end procedure for ending the charge sequence. However, the charge / discharge circuit 17 proceeds with the end procedure to a stage where the lock of the charge / discharge connector 19 can be released, and then maintains the charge / discharge connector 19 without releasing the lock (S58). Thereafter, the charge / discharge circuit 17 terminates the charge sequence while maintaining the lock of the charge / discharge connector 19 (S59). As a result, the reserved operation is temporarily terminated.

  When S41 is YES, the charge / discharge circuit 17 notifies the reserved operation control unit 20 to that effect. Upon receiving this notification, the reserved operation control unit 20 maintains the reserved operation setting. Therefore, the process shown in FIG. 5 returns to S53 after S59. Thus, when the charge / discharge device 1 stops the reserved operation because the charge rate of the storage battery of the electric vehicle 2 has reached the target charge rate, the charge / discharge device 1 does not charge until the next reserved operation start time arrives. The standby process is continued again while maintaining the lock of the discharge connector 19.

  Similarly, also when S56 is YES, after the process of S57-S59 is performed, the process of FIG. 5 returns to S53. Thus, even if the charging / discharging device 1 stops the reserved operation because the scheduled operation end time has arrived, the charge / discharge device 19 remains locked until the next reserved operation start time arrives. The standby process is continued again.

  As described above, the charging / discharging device 1 can bring the charging rate of the electric vehicle 2 closer to the target charging rate, similarly to the normal charging operation, even when the reservation operation is executed.

[Embodiment 3]
Embodiment 3 according to the present invention will be described below with reference to FIGS. Each member common to the above-described first or second embodiment is denoted by the same reference numeral, and detailed description thereof is omitted.

FIG. 6 is a diagram showing a configuration of a charging / discharging device 1A according to Embodiment 3 of the present invention. As shown in this figure, the charging / discharging device 1A (power control device) includes an input device 11 (operation unit), an input unit 12 (detection unit, reception unit), a display panel 13, a display unit 14 (resumption notification unit), Control circuit 15A,
Transformer 16, charge / discharge circuit 17 (power control unit), charge / discharge cable 18 (cable), charge / discharge connector 19 (connector), reserved operation control unit 20, restart control unit 22 (restart unit), and stop button determination unit 23 (Determination unit).

  Since members other than the control circuit 15A and the stop button determination unit 23 included in the charging / discharging device 1A are the same as those illustrated in FIG. 1, detailed description thereof is omitted. A restart control unit 22 and a stop button determination unit 23 are provided in the control circuit 15A. The stop button determination unit 23 determines whether or not the stop button is pressed during charging of the electric vehicle 2 and notifies the restart control unit 22 of the result. In the present embodiment, the restart control unit 22 controls the restart of the charging sequence based on this notification.

(Processing flow for charging operation)
FIG. 7 is a flowchart showing a process flow when the charging / discharging device 1A according to the second embodiment of the present invention executes the charging operation. Hereinafter, the case where the charging / discharging device 1A executes the charging operation will be described as an example. However, when the discharging operation (self-sustained operation or grid interconnection operation) is performed, the charging only changes to discharging. There is no essential difference in the flow.

  Since S61 to S66 of FIG. 7 are the same as S1 to S6 of FIG. After S66, during charging of the electric vehicle 2, the input unit 12 detects whether or not a stop button provided in the input device 11 has been pressed, and notifies the stop button determination unit 23 of the result. Based on this notification, the stop button determination unit 23 determines whether or not the stop button is pressed during charging of the electric vehicle 2 (S67). When S67 is NO, the subsequent S68 to S71 are basically the same as S41 to S44 of FIG.

  If S67 is YES, that is, if it is determined that the stop button has been pressed during the execution of the charging sequence (during charging of the electric vehicle 2), the stop button determination unit 23 notifies the control circuit 15A to that effect. The restart control unit 22 instructs the charge / discharge circuit 17 to end the charge sequence based on the notification to the control circuit 15A. Upon receiving this instruction, the charge / discharge circuit 17 stops charging the electric vehicle 2 (S72). Thereafter, the charge / discharge circuit 17 maintains the charge / discharge connector 19 (S73), and further ends the charge sequence (S74). Thereby, the charging operation of the charging / discharging device 1A is temporarily stopped.

  When the charging / discharging circuit 17 ends the charging sequence, the charging / discharging circuit 17 notifies the restart control unit 22 to that effect. Upon receiving this notification, the restart control unit 22 determines whether or not the charging / discharging device 1A has been operated (S75). For example, when a user operation on the input device 11 is detected by the input unit 12 and the resumption control unit 22 is notified to that effect, the resumption control unit 22 determines that the charge / discharge device 1A has been operated.

  When S75 is YES, the charge / discharge circuit 17 releases the charge / discharge connector 19 (S76). Thereafter, the process shown in FIG. 7 ends. Thus, the charging / discharging device 1A stops the charging operation as usual when the charging / discharging device 1A is operated immediately after the stop button is pressed. That is, the charging restart process is not performed. Thereby, when the pressing operation of the stop button is made by the intention of the owner of the electric vehicle 2 rather than the mischief of a third party, the charging operation can be normally stopped as desired by the owner.

  When S75 is NO, the restart control unit 22 determines whether or not the connection confirmation line for confirming the connection between the charge / discharge connector 19 provided in the charge / discharge cable 18 and the electric vehicle 2 is conductive. (S77). When S77 is NO, the charging / discharging device 1 does not resume the charging sequence. Thereby, the process of FIG. 7 is completed. When the connection confirmation line is not conductive, there is a high possibility that the charging / discharging connector 19 is not normally connected to the electric vehicle 2, so there is a high possibility that the charging sequence will not succeed even if the charging sequence is restarted. Since the charging / discharging device 1 does not restart the charging sequence when S77 is NO, the charging / discharging device 1 can prevent the charging sequence that is likely not to be successful from being restarted wastefully.

  On the other hand, when S77 is YES, the restart control unit 22 determines whether or not a predetermined time (here, 5 minutes) has elapsed since the stop button was pressed (S78). If S78 is NO, the process of FIG. 7 returns to S75. Thus, 1 A of charging / discharging apparatuses repeat the process of S75, S77, and S78 until S78 becomes YES. That is, the charging / discharging device 1A performs the charging operation until 5 minutes elapses after the stop button determination unit 23 is pressed during charging and the charging / discharging device 1A is not operated and the connection recognition line is conductive. Wait in a stopped state.

  When S78 is YES, the restart control unit 22 notifies the display unit 14 that charging of the electric vehicle 2 is restarted. Upon receiving this notification, the display unit 14 displays a message on the display panel 13 for notifying the user that the charging / discharging device 1A is resuming charging of the electric vehicle 2 (S79). In addition, 1 A of charging / discharging apparatuses may make it light-emit the light emission part (light emitting diode element etc.) which shows the resumption of charging instead of displaying a message on the display panel 13.

  After S79, the restart control unit 22 notifies the charge / discharge circuit 17 to start the charge sequence again. Upon receiving this notification, the process of FIG. 7 returns to S63, and the charge / discharge circuit 17 starts the charging sequence again (S63). Thereafter, the processes of S64 and subsequent steps are sequentially executed, so that charging of the storage battery of the electric vehicle 2 is resumed.

As described above, the charging / discharging device 1 is in a state in which the connection confirmation line is in a conductive state after the stop button for stopping the operation of the charging / discharging device 1 is pressed during the execution of the charging sequence. When elapses, the charging sequence starts again. Thereafter, if the stop button is not pressed again, the charging / discharging device 1 can normally charge the storage battery of the electric vehicle 2. Thereby, since the charging sequence is resumed in a state where the charging / discharging connector 19 is normally connected to the electric vehicle 2, it is possible to avoid a situation where the charging sequence is not resumed normally. Furthermore, since the third party pressed the operation unit of the charging / discharging device 1 by mischief, the charging of the storage battery may be performed again after the charging is interrupted without the charging rate of the storage battery reaching the target charging rate. Since it can do, the charge rate of a storage battery can be raised more. Also,
Therefore, the charging / discharging device 1A can bring the charging rate of the storage battery of the electric vehicle 2 closer to the target charging rate.

(Reserved driving process flow)
FIG. 8 is a flowchart showing a flow of processing when the charging / discharging device 1A according to the second embodiment of the present invention executes a reserved operation. In the following, the case where the charging / discharging device 1A executes a reserved operation for charging will be described as an example. However, even when the reserved operation for discharging (reserved grid connection operation) is executed, the charge is discharged. There is no essential difference in the flow of processing.

  S61 to S62 in FIG. 8 are the same as S61 to S62 in FIG. When an instruction to start a reserved operation is received in S62, the charge / discharge circuit 17 acquires information related to the electric vehicle 2 from the electric vehicle 2 (S81). Since this process is the same as S31 of FIG. 3, detailed description thereof is omitted. When the charging / discharging circuit 17 has successfully acquired this information, the charging / discharging connector 19 locks the charging / discharging connector 19 to the electric vehicle 2 (S82).

  Thereafter, the charging / discharging device 1 continues the standby process until the start time of the reserved operation. Specifically, the input unit 12 detects whether or not the stop button provided in the input device 11 has been pressed, and determines whether or not the stop button has been pressed based on the result (S83). If S83 is YES, the input unit notifies the control circuit 15A accordingly. Based on this notification, the control circuit 15A instructs the charge / discharge circuit 17 to unlock the charge / discharge connector 19. Based on this instruction, the charge / discharge circuit 17 unlocks the charge / discharge connector 19. (S84). Further, the reserved operation control unit 20 cancels the setting of the reserved operation set in the charge / discharge device 1 based on the notification to the control circuit 15. As a result, the process shown in FIG. 8 ends. Therefore, the charging / discharging device 1 does not execute the reserved operation.

  On the other hand, when S83 is NO, the reserved operation control unit 20 determines whether or not the current time is within the reserved operation time zone set in the charging / discharging device 1A (S85). For example, when the current time coincides with the reserved operation start time, S85 becomes YES.

  If S85 is NO, the process shown in FIG. 8 returns to S83. Therefore, the processes of S83 and S85 are repeated until S85 becomes YES. That is, after the start button is pressed, the charging / discharging device 1A waits until the set reserved operation start time arrives.

  When S85 is YES, the reserved operation control unit 20 instructs the charge / discharge circuit 17 to start the charging sequence. In response to this instruction, the charge / discharge circuit 17 starts a charge sequence (S63). If the time when the user presses the start button is already within the reserved operation time zone, the determination result in S85 immediately becomes YES after S83. Therefore, 1 A of charging / discharging apparatuses start reservation operation immediately, without waiting until arrival of reservation operation start time, after a start button is pushed down.

  Since S63 to S79 in FIG. 8 are basically the same as S63 to S79 in FIG. 7, detailed description thereof is omitted. However, since the charging / discharging connector 19 is already locked to the electric vehicle 2, the charging / discharging circuit 17 may or may not execute the locking process of the charging / discharging connector 19 in S64 as in the case of resuming the charging sequence. Further, after S79, the process shown in FIG. 8 returns to S83. Therefore, when the stop button is pressed during charging of the electric vehicle 2, a series of processes for charging the electric vehicle 2 is resumed if the current time is within the reserved driving time zone.

  In FIG. 8, the processing after S68 is different from that in FIG. When S68 is NO, the reserved operation control unit 20 determines whether or not the current time is outside the reserved operation time zone (S86). Specifically, the reserved operation control unit 20 determines whether the current time is before the reserved operation start time or after the reserved operation end time. For example, when the current time coincides with the reserved operation end time, S86 becomes YES.

  When S86 is NO, the process shown in FIG. 8 returns to S67, and the charge / discharge circuit 17 continues to charge the electric vehicle 2. As described above, when the reserved operation is executed, the charge / discharge circuit 17 does not press the stop button during charging, the charge rate of the storage battery does not reach the target charge rate, and the reserved operation end time does not arrive. Continue charging the electric vehicle 2.

  On the other hand, when S68 is YES, that is, when it is determined that the charging rate of the storage battery of the electric vehicle 2 has reached the target charging rate, the charging / discharging circuit 17 stops charging the electric vehicle 2 (S87). After charging is stopped, the charge / discharge circuit 17 starts an end procedure for ending the charge sequence. However, the charge / discharge circuit 17 proceeds with the end procedure until the lock of the charge / discharge connector 19 can be released, and then maintains the charge / discharge connector 19 without releasing the lock (S88). Thereafter, the charge / discharge circuit 17 ends the charge sequence while maintaining the lock of the charge / discharge connector 19 (S89). As a result, the reserved operation is temporarily terminated.

  When S68 is YES, the charge / discharge circuit 17 notifies the reserved operation control unit 20 to that effect. Upon receiving this notification, the reserved operation control unit 20 maintains the reserved operation setting. Therefore, the process shown in FIG. 8 returns to S83 after S89. Thus, when the charge / discharge device 1 stops the reserved operation because the charge rate of the storage battery of the electric vehicle 2 has reached the target charge rate, the charge / discharge device 1 does not charge until the next reserved operation start time arrives. The standby process is continued again while maintaining the lock of the discharge connector 19.

  Similarly, also when S86 is YES, after the process of S87-S89 is performed, the process of FIG. 8 returns to S83. Thus, even if the charging / discharging device 1 stops the reserved operation because the scheduled operation end time has arrived, the charge / discharge device 19 remains locked until the next reserved operation start time arrives. The standby process is continued again.

  As described above, the charging / discharging device 1 </ b> A can bring the charging rate of the electric vehicle 2 closer to the target charging rate, similarly to the normal charging operation, even when the reservation operation is executed.

[Embodiment 4]
Embodiment 4 according to the present invention will be described below with reference to FIGS. Each member common to any of Embodiments 1 to 3 described above is given the same reference numeral, and detailed description thereof is omitted.

  FIG. 9 is a diagram showing a configuration of a charge / discharge device 1B according to Embodiment 4 of the present invention. As shown in this figure, the charging / discharging device 1B (power control device) includes an input device 11 (operation unit), an input unit 12 (detection unit, reception unit), a display panel 13, a display unit 14 (resumption notification unit), Control circuit 15B, transformer 16, charge / discharge circuit 17 (power control unit), charge / discharge cable 18 (cable), charge / discharge connector 19 (connector), reserved operation control unit 20, resumption control unit 22 (resumption unit), and charging A rate determination unit 24 (determination unit) is provided.

  Since members other than the control circuit 15B and the charging rate determination unit 24 included in the charge / discharge device 1B are the same as those illustrated in FIG. 1, detailed description thereof is omitted. In the control circuit 15B, a reserved operation control unit 20, a restart control unit 22, and a charge rate determination unit 24 are provided. The charging rate determination unit 24 determines whether or not the charging rate of the storage battery of the electric vehicle 2 has reached the target charging rate during charging of the electric vehicle 2 and notifies the restart control unit 22 of the result. In the present embodiment, the restart control unit 22 controls the restart of the charging sequence based on this notification.

(Processing flow for charging operation)
FIG. 10 is a flowchart showing a flow of processing when the charging / discharging device 1B according to the fourth embodiment of the present invention performs the charging operation. Hereinafter, the case where the charging / discharging device 1B executes the charging operation will be described as an example. However, when the discharging operation (that is, the self-sustaining operation or the grid interconnection operation) is performed, only the charging is changed to discharging. There is no essential difference in the flow.

  Since S91 to S96 in FIG. 10 are the same as S1 to S6 in FIG. 2, detailed description thereof is omitted. After S96, during charging of the electric vehicle 2, the input unit 12 detects whether or not the stop button provided in the input device 11 has been pressed, and based on the result, the stop button is charged during charging of the electric vehicle 2. It is determined whether or not the button has been pressed (S97). When S97 is NO, the charging rate determination unit 24 has reached the charging rate of the storage battery periodically notified from the electric vehicle 2 to the charging / discharging circuit 17 has reached the target charging rate set in the charging / discharging device 1B. It is determined whether or not (S98).

  When S98 is NO, the process of FIG. 10 returns to S97. Therefore, when the stop button is not pressed during charging and the charging rate of the storage battery does not reach the target charging rate, the charging / discharging circuit 17 continues to charge the electric vehicle 2.

(Forced termination of charging operation)
On the other hand, when S98 is YES, the charging rate determination unit 24 determines that the charging rate of the storage battery of the electric vehicle 2 has reached the target charging rate during charging of the electric vehicle 2 (the third time here). Whether or not (S99). When S99 is YES, the charging rate determination unit 24 instructs the charging / discharging circuit 17 to end the charging sequence. In response to this instruction, the charging / discharging circuit 17 stops charging the electric vehicle 2 (S100). Thereafter, the charging / discharging circuit 17 unlocks the charging / discharging connector 19 (S101), and ends the charging sequence (S102). Thereafter, the process of FIG. 10 ends.

(Resumption of charging sequence)
When S97 is YES, the control circuit 15B instructs the charging / discharging circuit 17 to end the charging sequence. In response to this instruction, the charge / discharge circuit 17 stops the charging of the electric vehicle 2 (S100). Subsequent processing is the same as the above-described example.

  On the other hand, when S99 is NO, that is, when the charging rate of the storage battery of the electric vehicle 2 has reached the target charging rate during the charging of the electric vehicle 2 is less than the third time, the charging rate determination unit 24 does so. Is notified to the resumption control unit 22. Upon receiving this notification, the restart control unit 22 instructs the charge / discharge circuit 17 to end the charging sequence. Further, the charging rate determination unit 24 stores the number of times that the charging rate of the storage battery of the electric vehicle 2 has reached the target charging rate during charging of the electric vehicle 2 in the storage unit. Upon receiving this instruction, the charge / discharge circuit 17 stops charging the electric vehicle 2 (S103). Thereafter, the charge / discharge circuit 17 maintains the lock of the charge / discharge connector 19 (S104), and further ends the charge sequence (S105). Thereby, the charging operation of the charging / discharging device 1B is temporarily stopped.

  The charge / discharge circuit 17 notifies the restart control unit 22 of the completion of the charge sequence. The restart control unit 22 determines whether or not a predetermined time (here, 5 minutes) has elapsed since the end of the charging sequence. When S106 is NO, the restart control unit 22 stands by as it is. On the other hand, when S106 is YES, the restart control unit 22 notifies the display unit 14 that charging of the electric vehicle 2 is restarted. In response to this notification, the display unit 14 displays a message notifying the user that the charging / discharging device 1B is resuming charging of the electric vehicle 2 on the display panel 13 (S107). In addition, instead of displaying a message on the display panel 13, the charging / discharging device 1 </ b> B may cause a light emitting unit (such as a light emitting diode element) indicating that charging is being resumed to emit light.

  After S107, the restart control unit 22 instructs the charge / discharge circuit 17 to restart the charge sequence. Upon receiving this instruction, the process of FIG. 10 returns to S93, and the charge / discharge circuit 17 starts the charge sequence again (S93). After that, the processes of S94 and subsequent steps are sequentially executed, whereby charging of the storage battery of the electric vehicle 2 is resumed.

  As described above, when the charging / discharging device 1 determines that the charging rate of the storage battery has reached the specified value for charging the storage battery mounted on the electric vehicle 2, the charging sequence is once terminated, and then the charging sequence is performed. Try again. Thereafter, when it is determined that the charging rate of the storage battery is lower than the specified value, the charging / discharging device 1 charges the storage battery of the vehicle again. As a result, since the charging rate of the storage battery notified from the electric vehicle 2 is higher than the actual value, the charging of the storage battery is stopped after the charging is interrupted even though the actual charging rate of the storage battery has not reached the specified value. Charging is performed again. Thereby, the charge rate of a storage battery can be raised more. Therefore, the charging / discharging device 1 can bring the charging rate of the storage battery of the vehicle closer to the target charging rate.

  In addition, the restart control unit 22 causes the charge sequence to be charged to the charge / discharge circuit 17 when it is determined that the charge rate of the storage battery has reached the specified value after causing the charge / discharge circuit 17 to restart the charge sequence a specified number of times. Do not start again. Thereby, it is possible to prevent the charging sequence from being repeated unnecessarily.

  The resumption control unit 22 causes the charge / discharge circuit 17 to restart the charge sequence after a predetermined time has elapsed after the end of the charge sequence. The calculation result of the charging rate of the storage battery in the electric vehicle 2 may be different depending on the temperature of the storage battery. It can be expected that the temperature of the storage battery of the electric vehicle 2 will decrease if a specified time elapses after the end of the charging sequence. If the temperature of the storage battery decreases, it can be expected that the electric vehicle 2 calculates a charging rate closer to the actual charging rate of the storage battery and notifies this to the charging / discharging device 1B. Therefore, the actual charging rate of the electric vehicle 2 can be made closer to the target charging rate.

  Note that if the specified time elapses after the end of the charging sequence, the storage battery may be slightly discharged, and the charge rate of the storage battery may slightly decrease. Since charging / discharging device 1B restarts the charging sequence after a specified time, even if the charging rate slightly decreases, charging can be performed to compensate for the decreased amount by the charging sequence after restarting. Therefore, such a slight decrease in the charging rate is not a problem.

(Reserved driving process flow)
FIG. 11 is a flowchart showing a flow of processing when the charge / discharge device 1B according to Embodiment 4 of the present invention performs a reserved operation. In the following, the case where the charging / discharging device 1B executes a reserved operation for charging will be described as an example. However, even when the reserved operation for discharging (reserved grid connection operation) is executed, the charge is discharged. There is no essential difference in the flow of processing.

  Since S91 to S92 in FIG. 11 are the same as S91 to S92 in FIG. 10, detailed description thereof is omitted. When an instruction to start a reserved operation is received in S92, the charge / discharge circuit 17 acquires information related to the electric vehicle 2 from the electric vehicle 2 (S111). Since this process is the same as S31 of FIG. 3, detailed description thereof is omitted. The charging / discharging circuit 17 locks the charging / discharging connector 19 to the electric vehicle 2 when this information can be acquired normally (S112).

  Thereafter, the charging / discharging device 1 continues the standby process until the start time of the reserved operation. Specifically, the input unit 12 detects whether or not a stop button provided in the input device 11 has been pressed, and determines whether or not the stop button has been pressed based on the result (S113). When S113 is YES, the input unit notifies the control circuit 15B to that effect. Based on this notification, the control circuit 15B instructs the charge / discharge circuit 17 to unlock the charge / discharge connector 19. Based on this instruction, the charge / discharge circuit 17 unlocks the charge / discharge connector 19. (S114). Further, the reserved operation control unit 20 cancels the setting of the reserved operation set in the charge / discharge device 1 based on the notification to the control circuit 15. As a result, the process shown in FIG. 11 ends. Therefore, the charging / discharging device 1 does not execute the reserved operation.

  On the other hand, when S113 is NO, the reserved operation control unit 20 determines whether or not the current time is within the reserved operation time zone set in the charge / discharge device 1B (S115). For example, when the current time coincides with the reserved operation start time, S115 is YES. When S115 is NO, the process shown in FIG. 11 returns to S113. Therefore, the processes of S113 and S115 are repeated until S115 becomes YES. That is, after the start button is pressed, the charging / discharging device 1B waits until the set reserved operation start time arrives.

  When S115 is YES, the reserved operation control unit 20 instructs the charge / discharge circuit 17 to start the charge sequence. In response to this instruction, the charge / discharge circuit 17 starts a charge sequence (S93). If the time when the user presses the start button is already within the reserved operation time zone, the determination result in S115 is immediately YES after S113. Therefore, after the start button is pressed, the charging / discharging device 1B immediately starts the reserved operation without waiting until the reserved operation start time comes.

  Since S93 to S107 in FIG. 11 are basically the same as S93 to S107 in FIG. 11, detailed description thereof is omitted. However, since the charging / discharging connector 19 has been locked to the electric vehicle 2, the locking process of the charging / discharging connector 19 in S94 may or may not be executed as in the case of resuming the charging sequence. Further, after S107, the processing shown in FIG. 11 returns to S113. Therefore, when the charge rate of the storage battery of the electric vehicle 2 has reached the target charge rate during charging of the electric vehicle 2 is less than three times, if the current time is within the reserved operation time zone, the charging sequence Is resumed.

  In FIG. 11, the processing after S97 is different from FIG. Specifically, when S97 is NO, the reserved operation control unit 20 determines whether or not the current time is outside the reserved operation time zone (S116). Specifically, the reserved operation control unit 20 determines whether the current time is before the reserved operation start time or after the reserved operation end time. For example, when the current time coincides with the reserved operation end time, S116 is YES.

  If S116 is NO and then S99 is NO, the process shown in FIG. 11 returns to S97. Therefore, when the reserved operation is performed, the charging / discharging circuit 17 is in the electric vehicle unless the stop button is pressed during charging, the charge rate of the storage battery does not reach the target charge rate, and the reserved operation end time does not arrive. Continue charging 2.

(Normal completion of reserved operation)
On the other hand, when S116 is YES, the reserved operation control unit 20 notifies the charge / discharge circuit 17 to end the charging sequence. Upon receiving this notification, the charge / discharge circuit 17 stops charging the electric vehicle 2 (S117). Thereafter, the charge / discharge circuit 17 maintains the lock of the charge / discharge connector 19 (S118), and further ends the charge sequence (S119). As a result, the reserved operation is temporarily terminated.

  When S116 is YES, the reserved operation control unit 20 maintains the reserved operation setting. Thereafter, the processing shown in FIG. 11 returns to S113 after S119. As described above, when the reserved operation is stopped because the scheduled operation end time has arrived, the charge / discharge device 1B maintains the lock of the charge / discharge connector 19 until the next reserved operation start time arrives. The standby process is continued again.

  When S102 is YES, the charge / discharge circuit 17 notifies the reserved operation control unit 20 to that effect and stops charging the electric vehicle 2 (S117). Thereafter, S118 and S119 are executed, and the reserved operation is once ended. Further, the reserved operation control unit 20 maintains the reserved operation setting based on the notification from the charge / discharge circuit 17. Thereafter, the processing shown in FIG. 11 returns to S113. Thus, even when the charge / discharge device 1B stops the reserved operation because the charge rate of the storage battery of the electric vehicle 2 has reached the target charge rate for the third time, the next reserved operation start time The standby process is continued again while the lock of the charge / discharge connector 19 is maintained until the time is reached.

  As described above, the charging / discharging device 1 </ b> B can bring the charging rate of the electric vehicle 2 closer to the target charging rate, similarly to the normal charging operation, even when the reservation operation is executed.

(Various aspects of the device)
In the first to fourth embodiments, examples of the charge / discharge devices 1 to 1B that can perform both charging of the electric vehicle 2 and discharging from the electric vehicle 2 have been described. However, each embodiment of the present invention is not limited to this. That is, the present invention is also realized as various power converters that can charge or discharge the electric vehicle 2. More specifically, a charging device capable of charging only among charging and discharging of the electric vehicle 2 and a discharging device capable of discharging only among charging and discharging of the electric vehicle 2 are also included in the technical scope of the present invention. It is.

[Example of software implementation]
Control blocks of charging / discharging device 1 (especially input unit 12, display unit 14, reserved operation control unit 20, abnormality determination unit 21, resumption control unit 22), control blocks of charging / discharging device 1A (particularly input unit 12, display unit 14) , Reserved operation control unit 20, resumption control unit 22, stop button determination unit 23), and control block of charge / discharge device 1B (particularly input unit 12, display unit 14, reserved operation control unit 20, resumption control unit 22, charge rate) The determination unit 24) may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or may be realized by software using a CPU (Central Processing Unit). . In the latter case, the charge / discharge device 1 includes a CPU that executes instructions of a program that is software for realizing each function, and a ROM (Read Only Memory) in which the program and various data are recorded so as to be readable by a computer (or CPU). Alternatively, a storage device (these are referred to as “recording media”), a RAM (Random Access Memory) that expands the program, and the like are provided. And the objective of this invention is achieved when a computer (or CPU) reads the said program from the said recording medium and runs it. As the recording medium, a “non-temporary tangible medium” such as a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. The program may be supplied to the computer via an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program. The present invention can also be realized in the form of a data signal embedded in a carrier wave in which the program is embodied by electronic transmission.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims. Embodiments obtained by appropriately combining technical means disclosed in different embodiments are also included in the technical scope of the present invention. A new technical feature can also be formed by combining the technical means disclosed in each embodiment.

  For example, the charging / discharging devices 1 to 1B may be devices corresponding to other standards (such as COMBO standards) for charging or discharging the storage battery of the electric vehicle 2 that are different from the CHAdeMO standards. In this case, the charge / discharge cable 18 and the charge / discharge connector 19 are cables and connectors corresponding to the other standards. Further, the charge / discharge circuit 17 executes a charge sequence (or a discharge sequence) corresponding to the other standard. In addition, when the charging / discharging apparatus 1 is an apparatus corresponding to another standard, the electric vehicle 2 that is charged or discharged by the charging / discharging apparatus 1 also needs to comply with the standard.

  The electric vehicle 2 can notify the charge / discharge devices 1 to 1B of the remaining battery capacity and the total battery capacity of the storage battery instead of the charge rate of the storage battery. In this case, the charge / discharge circuit 17 calculates the charging rate of the storage battery based on the received remaining battery capacity and the total battery capacity, and determines whether the calculated charging rate has reached the target charging rate.

1 Charging / discharging device (power control device)
2 Electric vehicle (vehicle)
3 Building 4 Commercial power system 11 Input device (operation unit)
12 Input unit (detection unit, reception unit)
13 Display Panel 14 Display Unit (Resume Notification Unit)
15 to 15B Control circuit 16 Transformer 17 Charge / discharge circuit (power control unit)
18 Charging / discharging cable (cable)
18a Power line 18b Signal line 20 Reserved operation control unit 21 Abnormality determination unit (determination unit)
22 Resume control part (Resume part)
23 Stop button determination unit (determination unit)
24 Charging rate determination unit (determination unit)
31 Distribution board 32 Load

Claims (14)

A power control device for charging or discharging a storage battery mounted on a vehicle,
A power control unit for charging or discharging the storage battery;
A determination unit that determines whether an abnormality has occurred while the power control unit is executing a series of processing steps for charging or discharging the storage battery;
When it is determined that the abnormality has occurred, the power control unit ends the series of processing procedures being executed, and then includes a restart unit that causes the power control unit to restart the series of processing procedures. The power control apparatus characterized by the above-mentioned.   When it is determined that the abnormality has occurred while the power control unit is charging or discharging the storage battery, the restarting unit first causes the power control unit to stop charging or discharging the storage battery, and then executes The power control apparatus according to claim 1, wherein the power control unit terminates the series of processing procedures therein, and then causes the power control unit to restart the series of processing procedures.   When it is determined that the abnormality has occurred before the charging or discharging is started during execution of the series of processing procedures, the restarting unit ends the series of processing procedures being executed to the power control unit. The power control apparatus according to claim 1, wherein the power control unit is restarted by the power control unit.   The restarting unit waits for a specified time until the power control unit restarts the series of processing steps when it is determined that the abnormality has occurred. The power control apparatus according to claim 1.   5. The power control apparatus according to claim 4, wherein, when it is determined that the abnormality has repeatedly occurred, the restarting unit waits for the specified time longer as the number of occurrences of the abnormality increases.   The said restarting part does not make the said electric power control part start again the said process sequence, when it determines with the said abnormality having repeatedly generate | occur | produced the specified number of times. The power control device described in 1.   The power control according to any one of claims 1 to 6, further comprising: an abnormality occurrence notifying unit that notifies that the abnormality has occurred when it is determined that the abnormality has repeatedly occurred. apparatus.   The abnormality includes an abnormality in a control system, an input / output system, a communication system, or a weak electric system in the power control apparatus, an abnormality when the power control unit communicates with the vehicle, and before charging or discharging of the vehicle is started. The power control apparatus according to claim 1, wherein the power control apparatus is at least one of abnormalities in the inspection system. A power control device for charging or discharging a storage battery mounted on a vehicle,
A power control unit for charging or discharging the storage battery;
An operation unit for stopping the operation of the power control device;
A determination unit for determining whether or not the operation unit is pressed while the power control unit is executing a series of processing steps for charging or discharging the storage battery;
When it is determined that the operation unit has been pressed, the power control unit terminates a series of processing procedures being executed, and when the predetermined time has elapsed, the power control unit is caused to restart the series of processing procedures. A power control apparatus comprising: a resuming unit. A cable for charging or discharging the storage battery;
A connector provided at one end of the cable and connected to the vehicle;
A connection confirmation line for confirming a connection between the vehicle and the connector, provided in the cable;
The resuming unit terminates a series of processing procedures being executed by the power control unit, and detects that the connection confirmation line is not conductive before a predetermined time elapses, The power control apparatus according to claim 9, wherein the power control unit does not restart the procedure. A power control device for charging or discharging a storage battery mounted on a vehicle,
A power control unit for charging or discharging the storage battery;
A determination unit that determines whether or not the charging rate of the storage battery has reached a specified value while the power control unit is executing a series of processing procedures for charging or discharging the storage battery;
When it is determined that the charging rate of the storage battery has reached a specified value, a restarting unit that terminates a series of processing procedures being executed by the power control unit, and then causes the power control unit to restart the series of processing procedures. And a power control device.   The restarting unit restarts the power control unit a predetermined number of times, and then determines that the charging rate of the storage battery has reached a specified value, the processing sequence is The power control apparatus according to claim 11, wherein the power control unit is not restarted.   The restarting unit causes the power control unit to end the series of processing procedures, and causes the power control unit to restart the series of processing procedures after a predetermined time has elapsed. 12. The power control apparatus according to 12.   The resumption unit further includes a resumption notification unit for notifying that charging or discharging of the storage battery is resumed when the power control unit restarts the series of processing procedures. The power control apparatus according to any one of 1 to 13.

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