JP2017192275A - Power control unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve more complete execution of reserved operation.SOLUTION: A chargeable state determination part (21) determines whether or not a charge and discharge circuit (17) is under such a state as to be capable of charging or discharging a storage battery of an electric vehicle (2). A connector lock control part (22) maintains a charge and discharge connector (19) kept locked against the electric vehicle 2 until starting time of reserved operation after the charge and discharge circuit (17) is under such a state as to be capable of charging or discharging the storage battery of the 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.

  The user of the charging / discharging device can reserve in advance in the charging / discharging device a time period during which the charging / discharging device performs charging or discharging. Such charging or discharging operation based on reservation is hereinafter referred to as reservation operation. The user can charge the electric vehicle by using the charging / discharging device corresponding to the reserved driving, for example, when he / she is absent (for example, when he / she goes out) or at a time when the electricity rate is low (for example, at midnight).

  However, the conventional charging / discharging device has a problem that the reserved operation may not actually be performed because the charging / discharging device cannot normally charge or discharge the electric vehicle at the start of the reserved operation. Such non-execution of the reserved operation may occur due to some abnormality or setting in the charging / discharging device or the electric vehicle.

  Examples of the abnormality on the charge / discharge device side include that the charge / discharge connector is not properly connected to the electric vehicle, that the charge / discharge connector is not locked, and that the charge / discharge cable is disconnected. In addition, as a setting on the charging / discharging device side, it may be mentioned that a reserved discharge operation is set for an electric vehicle that does not support discharge.

  For example, on the electric vehicle side, the electric vehicle is not parked, the ignition of the electric vehicle is turned on, the operation reservation of the air conditioner is made on the electric vehicle side, or the electric vehicle side The charging operation is reserved by a different charging method different from the charging method of the charging / discharging device.

  If there is a factor that hinders the charging or discharging of the electric vehicle by the charging / discharging device, the charging / discharging device should normally perform the reserved charging or discharging even if the user correctly sets the reserved driving. I can't. Therefore, in the conventional charging / discharging device, for example, even if the user makes a reservation with the charging / discharging device to charge the electric vehicle at midnight, the reserved charging is not actually performed. There was a risk of a situation that would not be possible even if one wanted to use an electric vehicle.

  One technique capable of coping with such a problem is disclosed in Patent Document 1. In Patent Document 1, after a connector cable is connected to an electric vehicle, when a charge request signal is input to a charging reservation stand, information is exchanged between the quick charger and the electric vehicle using a control line and a communication line. A charging method is disclosed in which the connection status of the connector cable is confirmed by a connection confirmation device of the quick charger.

  In the technique of Patent Document 1, the connection state between the charging reservation stand and the electric vehicle is confirmed in advance before the charging start time, and when this confirmation is made normally, the connection between the two is cut off. Thereafter, the charging reservation stand waits until the charging start time, and when the time comes, it connects to the electric vehicle and starts charging. As described above, according to the technique of Patent Document 1, since normal connection with the electric vehicle has been confirmed in advance before the start of reserved charging, it is expected that reserved charging is performed normally.

JP2013-27204A (published February 4, 2013)

  However, Patent Document 1 makes no mention of connector lock control after the connection situation is over. If the connector is unlocked after the connection status has been confirmed, the connector may be accidentally pulled out of the electric vehicle before the charging start time arrives. Therefore, the technique of Patent Document 1 has a problem in that charging of the electric vehicle may not be started reliably even if the charging order comes after the connection state has been normally completed.

  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 perform reservation driving | operation more reliably.

  In order to solve the above problems, 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 charging or discharging of the storage battery. A cable, a connector provided at one end of the cable, connected to the vehicle, a power control unit for charging or discharging the storage battery through the cable and the connector, and a series for charging or discharging the storage battery A determination unit that determines whether or not the power control unit is in a state in which the storage battery can be charged or discharged before a prescribed start condition for starting the processing procedure of the power control unit is established; From the time when the power control unit determines that the storage battery is in a chargeable or dischargeable state until the prescribed start condition is satisfied, Connector is characterized in that it comprises a and a lock control unit that maintains a state of being locked.

  According to said structure, a power control apparatus will start a series of processing procedures for charging or discharging the storage battery of a vehicle, if the regular start condition is satisfied. Such an operation of the power control apparatus is hereinafter referred to as a reserved operation. The power control device determines whether or not the power control unit is in a state in which the storage battery of the vehicle can be charged or discharged before the reserved driving start condition is satisfied. As a result, it is possible to prevent a situation in which the reserved operation start condition is established in a state where the power control device cannot charge or discharge the storage battery, and as a result, the reserved operation is not normally executed.

  If the power control unit determines that the storage battery can be charged or discharged before the reservation operation start condition is satisfied, the power control device then waits until the reservation operation start condition is satisfied. Maintain the connector lock on the vehicle. As a result, it is possible to prevent the connector from being removed from the vehicle by mischief before the reserved operation is started, so that it is possible to more reliably prevent the reserved operation from being started.

  As described above, the power control apparatus has an effect that the reserved operation can be more reliably performed.

  In the power control device according to aspect 2 of the present invention, in the aspect 1, the power control unit starts a series of processing procedures for charging or discharging the storage battery before the start condition is satisfied. Further, when the power control unit determines that the storage battery is in a chargeable or dischargeable state during execution of the series of processing procedures, the series of processing procedures is terminated.

  According to said structure, since it is not necessary to maintain the preparation state for charging or discharging a storage battery until the start conditions of a reservation driving | operation are satisfied, the power consumption in a power control apparatus can be reduced. Furthermore, it is possible to prevent consumption of the storage battery of the electric vehicle.

  In the power control device according to aspect 3 of the present invention, in the above aspect 2, the determination unit is configured such that communication between the power control unit and the vehicle is established while the power control unit is executing the series of processing steps. When the power control unit determines that the storage battery can be charged or discharged, while the power control unit does not establish communication with the vehicle during the series of processing steps, The power control unit determines that the storage battery is not in a chargeable or dischargeable state.

  According to said structure, it can determine earlier whether the electric power control part exists in the state which can charge or discharge a storage battery.

  The power control device according to aspect 4 of the present invention is the power control apparatus according to any one of the aspects 2 or 3, wherein the determination unit is charged by the power control unit from the vehicle or while the power control unit is executing the series of processes. When receiving a signal permitting discharge, the power control unit determines that the storage battery is in a chargeable or dischargeable state, while the power control unit is executing the series of processes. However, when the signal which permits charge or discharge from the said vehicle is not received, the said electric power control part determines with not being in the state which can charge or discharge the said storage battery.

  According to said structure, it can determine more reliably whether the electric power control part exists in the state which can charge or discharge a storage battery.

  The power control device according to aspect 5 of the present invention is the power control device according to any one of the aspects 2 to 4, wherein the determination unit is actually connected to the vehicle while the power control unit is executing the series of processes. When charging or discharging can be performed, the power control unit determines that the storage battery can be charged or discharged, while the power control unit is executing the series of processes. When the unit cannot actually charge or discharge the vehicle, the power control unit determines that the storage battery is not in a chargeable or dischargeable state.

  According to said structure, it can determine most reliably whether the electric power control part exists in the state which can charge or discharge the storage battery of a vehicle.

  The power control device according to aspect 6 of the present invention is the power control apparatus according to any one of the above aspects 2 to 5, wherein the power control unit is configured to finish the series of processing procedures until the prescribed start condition is satisfied. The series of processing procedures is restarted, and the determination unit determines whether the power control unit can charge or discharge the storage battery while the power control unit performs the series of processing procedures again. It is characterized by determining again whether or not.

  According to the above configuration, once it is determined that the power control unit is in a state where the storage battery can be charged or discharged, it is determined again whether or not an abnormality has occurred before the reserved operation is started. be able to.

  The power control device according to aspect 7 of the present invention is the power control device according to any one of the aspects 1 to 5, wherein a connection confirmation line for confirming connection between the vehicle and the connector is provided in the cable. The determination unit determines that the power control unit is in a state where the storage battery can be charged or discharged when the connection confirmation line is conductive, while the connection confirmation line is not conductive when the connection confirmation line is not conductive. The power control unit determines that the storage battery is not in a chargeable state.

  The process of confirming whether or not the connection confirmation line is conductive can be performed earlier than the series of processes for charging or discharging the storage battery. Therefore, according to said structure, it can be determined earliest whether the electric power control part exists in the state which can charge or discharge a storage battery.

  The power control device according to aspect 8 of the present invention further includes a reception unit that receives an instruction to set the prescribed condition in any of the above aspects 1 to 7, and the determination unit includes the instruction When accepted, the power control unit determines whether or not the storage battery can be charged or discharged.

  According to said structure, according to the setting instruction | indication of reservation driving | operation, it can be determined whether an electric power control part exists in the state which can charge or discharge a storage battery.

  The power control apparatus which concerns on aspect 9 of this invention notifies that when it determines with the said power control part being in the state which can charge or discharge the said storage battery in any one of the said aspects 1-8. It further comprises a status notification unit.

  According to said structure, when it determines with a power control part being in the state which can charge or discharge a storage battery, since a user can know that, he can leave | separate from a power control apparatus in comfort. .

  The power control device according to aspect 10 of the present invention, in any of the above aspects 1 to 9, when the power control unit determines that the storage battery is not in a chargeable or dischargeable state, an abnormality has occurred. Further, an abnormality occurrence notification unit for notifying is provided.

  According to the above configuration, when it is determined that the power control unit is not in a state in which the storage battery can be charged or discharged, the user can know that an abnormality has occurred, so that it is appropriate to deal with the abnormality. Can take action.

  The power control device according to aspect 11 of the present invention further includes, in any one of the above aspects 1 to 10, an operation unit for stopping the operation of the power control device, and a detection unit that detects an operation on the operation unit. The lock control unit includes the operation unit between the time when the power control unit is determined to be in a state in which the storage battery can be charged or discharged and until the prescribed condition is satisfied. When it is detected that the connector is pressed, the connector is unlocked with respect to the vehicle.

  According to said structure, since the operation part for exclusive use for canceling | releasing a connector lock is unnecessary, the structure of a power control apparatus can be simplified more.

  The power control device according to aspect 12 of the present invention is characterized in that, in any of the above aspects 1 to 11, the prescribed start condition is that the current time coincides with the prescribed start time.

  According to said structure, the electric power control apparatus can start charge or discharge of the storage battery of a vehicle normally, when the present time becomes start time.

  The power control device according to aspect 13 of the present invention is the power control device according to any one of the aspects 1 to 12, wherein the power control unit stops charging or discharging the storage battery when a specified end condition is satisfied, and the lock control unit Is characterized in that the connector is locked to the vehicle after the power control unit stops charging or discharging the storage battery.

  According to the above configuration, since the connector lock is maintained after the reserved operation is completed, it is possible to prevent the connector from being accidentally removed from the vehicle until the next reserved operation start condition is satisfied.

  In the power control device according to aspect 14 of the present invention, in the aspect 13, the specified end condition is that the current time coincides with the specified end time, the charge rate of the storage battery reaches a specified value, And / or a prescribed time has elapsed since the prescribed start condition is satisfied.

  According to said structure, the electric power control apparatus can complete | finish the charge or discharge of a storage battery normally, when either completion | finish conditions are satisfied.

  According to one aspect of the present invention, there is an effect that the reserved operation can be executed more reliably.

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 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 reservation driving | operation.

Embodiment 1
Embodiment 1 according to the present invention will be described below with reference to FIGS. 1 and 2.

(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 (state 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, chargeable state determination unit 21 (Determination unit) and a connector lock control unit 22 (lock control unit).

  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.

  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, a chargeable state determination unit 21, and a connector lock control unit 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 chargeable state determination unit 21 determines whether or not the charge / discharge circuit 17 is in a state where the electric vehicle 2 can be charged or discharged. Details of this determination will be described later.

  The connector lock control unit 22 controls the lock of the charge / discharge connector 19 with respect to the electric vehicle. Details of the connector lock control 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 31 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 time zone for executing the reserved operation in the charge / discharge device 1 in advance. 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. In other words, the user causes the charging / discharging device 1 to charge the electric vehicle 2 at midnight, which is a time zone when the electricity rate is cheap, while the grid charging operation is performed in the charging / discharging device 1 during the daytime when 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 reserved operation can be executed more reliably than the conventional technology. A specific method for realizing this will be described in detail below.

(Reserved driving process flow)
FIG. 2 is a flowchart showing a flow of processing when the charging / discharging device 1 according to the embodiment of the present invention performs a reserved operation. In the following, the case where the charging / discharging device 1 executes a reserved operation for charging will be described as an example. However, 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.

  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. Here, “reserved operation” is selected. Note that this selection operation is not necessarily required when the reserved operation has been set in advance in the charge / discharge device 1 as the operation mode. 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. In addition, when the time slot | zone has already been set to the charging / discharging apparatus 1, this input operation is not necessarily required. 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

  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 reserved operation control unit 20 and the chargeable state determination unit 21 that the reservation operation start instruction has been accepted.

(Determination of chargeable state)
In the present embodiment, the following condition 1 is set in the charging / discharging device 1 as a condition for determining that the charging / discharging circuit 17 is in a state in which the electric vehicle 2 can be charged:
Condition 1: The connection confirmation line with the electric vehicle 2 is conductive.

  Based on the notification from the input unit 12 to the control circuit 15, the chargeable state determination unit 21 determines whether or not the condition 1 is satisfied immediately, that is, before the start time of the reserved operation comes. Specifically, the chargeable state determination unit 21 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. Determine (S3).

(Notification of abnormal occurrence)
When S3 is NO, the chargeable state determination unit 21 determines that the charge / discharge circuit 17 is not in a state in which the electric vehicle 2 can be charged, and notifies the display unit 14 and the reserved operation control unit 20 to that effect. Based on the notification from the chargeable state determination unit 21, the display unit 14 generates a message for notifying that an abnormality has occurred and displays the message on the display panel 13. Thereby, the charging / discharging device 1 notifies the user of the occurrence of abnormality (S4). Further, the reserved operation control unit 20 cancels the setting of the reserved operation set in the charging / discharging device 1 based on the notification from the chargeable state determining unit 21. As a result, the process shown in FIG. Therefore, the charging / discharging device 1 does not execute the reserved operation.

In the present embodiment, the charging / discharging device 1 displays a message prompting confirmation of the connection state of the charging / discharging connector 19 on the display panel 13 in S4. As a message displayed at this time, for example,
・ Check the connection (fitting) state of the charge / discharge connector 19 to the electric vehicle 2 ・ Check the lock state of the charge / discharge connector 19 to the electric vehicle 2 ・ Try to insert / remove the charge / discharge connector 19 to / from the electric vehicle 2 Various messages such as requests are listed.

  When the user confirms that a message indicating the occurrence of abnormality is displayed on the display unit 14 in S4, the user takes an action for eliminating the abnormality. At that time, the message displayed on the display panel 13 can be referred to as appropriate. When the user resolves the abnormality, the user can instruct the charging / discharging device 1 to start the reserved operation by pressing the start button again. Thereafter, the process of S3 is performed again. Since the abnormality has been eliminated, it is highly likely that the next will be YES in S3.

(Notification of rechargeable state)
On the other hand, when S3 is YES, the chargeable state determination unit 21 determines that the charge / discharge circuit 17 is in a chargeable state, and notifies the display unit 14 and the connector lock control unit 22 to that effect. Upon receiving this notification, the connector lock control unit 22 instructs the charge / discharge circuit 17 to lock the charge / discharge connector 19. Upon receiving this instruction, the charge / discharge circuit 17 locks the charge / discharge connector 19 (S5).

  After S5, the display unit 14 displays a message on the display panel 13 notifying that the charge / discharge circuit 17 has been determined to be in a chargeable state based on the notification from the chargeable state determination unit 21. This notifies the user that the charge / discharge circuit 17 is in a chargeable state (S6). By confirming this notification message through the display panel 13, the user can know that the electric vehicle 2 is connected to the charging / discharging device 1 so that it can be normally charged by the charging / discharging device 1. it can. Therefore, the user can leave the charging / discharging device 1 with peace of mind.

  After S6, the charging / discharging device 1 stands by until the reserved operation is started. Meanwhile, the input unit 12 detects whether or not the stop button provided in the input device 11 is pressed, and determines whether or not the stop button is pressed based on the result (S7). If S7 is YES, the input unit 12 notifies the connector lock control unit 22 to that effect. In response to this notification, the connector lock control unit 22 notifies the charge / discharge circuit 17 to release the lock of the charge / discharge connector 19. Upon receiving this notification, the charge / discharge circuit 17 unlocks the charge / discharge connector 19 (S8). After S8, the process shown in FIG. 2 ends.

  The stop button is a button for stopping various operations in the charge / discharge device 1. In this embodiment, this stop button also functions as a button for releasing the lock of the charge / discharge connector 19. Thus, in this embodiment, since it is not necessary to provide the input device 11 with a dedicated button (dedicated operation unit) for unlocking the charge / discharge connector 19, the configuration of the input device 11 is further simplified. Can do.

  When S7 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 (S9). For example, when the current time coincides with the reserved operation start time, S9 becomes YES.

  When S9 is NO, the process shown in FIG. 2 returns to S7. Therefore, the processes of S7 and S9 are repeated until S7 becomes YES. That is, after it is determined that the charge / discharge circuit 17 is in a chargeable state, the charge / discharge device 1 waits until the set reserved operation start time arrives.

  When S9 is YES, the reserved operation control unit 20 instructs the charge / discharge circuit 17 to start the reserved operation. In response to this instruction, the charging / discharging circuit 17 starts a charging sequence for charging the electric vehicle 2 (S10). 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.

  As described above, in the charging / discharging device 1, charging / discharging is performed after it is determined that the connection confirmation line is conductive (the charging / discharging circuit 17 is in a chargeable state) until the start time of the reserved operation comes. The lock of the discharge connector 19 is maintained. Thereby, after a user leaves | separates from the charging / discharging apparatus 1, the third party cannot unplug the charging / discharging connector 19 from the electric vehicle 2 by mischief. Therefore, since the charge / discharge connector 19 can be normally connected to the electric vehicle 2 until the reserved operation is started, the charge / discharge device 1 can more reliably execute the reserved operation.

  Since the locking mechanism of the charge / discharge connector 19 is a latch type, power is required at the moment of the locking operation, but power for maintaining the locked state once established is unnecessary.

(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.

  After S10, the charge / discharge circuit 17 sequentially advances each processing procedure included in the charge sequence. Since the charge / discharge connector 19 is already locked when the reserved operation start time arrives, the charge / discharge circuit 17 starts the charge sequence with the charge / discharge connector 19 locked. When the charge test circuit 17 transmits to the electric vehicle 2 a charge start signal for notifying that the insulation test is completed and all the preparations for the charge / discharge device 1 are completed, the charge preparation is completed (S11). After completing the preparation for charging, the charging / discharging circuit 17 starts charging (current supply) to the electric vehicle 2 (S12).

(Forced termination of reserved driving)
The input unit 12 detects whether or not the stop button provided in the input device 11 is pressed during charging of the electric vehicle 2, and determines whether or not the stop button is pressed based on the result (S13). . When S13 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. Upon receiving this instruction, the charging / discharging circuit 17 stops the charging (current supply) of the electric vehicle 2 (S14). 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 (S15). Thereafter, the charging / discharging circuit 17 ends the charging sequence (S16). Thereby, the process shown in FIG. 2 is completed.

  Thus, if the user presses the stop button of the charging / discharging device 1 during the execution of the reserved operation, the execution of the reserved operation is immediately stopped and the lock of the charge / discharge connector 19 is released. Thereafter, the user can remove the charge / discharge connector 19 from the electric vehicle 2 and get on the electric vehicle 2.

  When S13 is NO, the reserved operation control unit 20 determines whether or not the current time is outside the reserved operation time zone (S17). Specifically, the charge / discharge circuit 17 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, S17 becomes YES.

  When S17 is NO, the process shown in FIG. 2 returns to S13, and the charge / discharge circuit 17 continues to charge the electric vehicle 2. Thus, the process shown in FIG. 2 repeats S13 and S17 until S17 becomes YES. That is, the charging / discharging device 1 continues to charge the electric vehicle 2 after the reserved operation is started until the stop button is not pressed and the reserved operation end time comes.

(Normal completion of reserved operation)
When S17 is YES, the reserved operation control unit 20 notifies the charge / discharge circuit 17 and the connector lock control unit 22 to that effect. Based on this notification, the connector lock control unit 22 instructs the charge / discharge circuit 17 to maintain the lock of the charge / discharge connector 19. On the other hand, the charge / discharge circuit 17 stops charging the electric vehicle 2 based on the notification from the reserved operation control unit 20 (S18). 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 based on an instruction from the charge / discharge connector 19 and then maintains the charge / discharge connector 19 without releasing the lock ( S19). Thereafter, the charge / discharge circuit 17 terminates the charge sequence while maintaining the lock of the charge / discharge connector 19 (S20). As a result, the reserved operation is temporarily terminated.

  If S17 is YES, the reserved operation control unit 20 maintains the reserved operation setting. Therefore, after S20, the process shown in FIG. 2 returns to S7. As a result, after completion of the reserved operation, the charging / discharging device 1 shifts itself to the standby state again until the next reserved operation start time comes. Thereby, since the power consumption for maintaining the charge preparation state for charging the electric vehicle 2 becomes unnecessary until the next reserved driving is started, the power consumption in the charging / discharging device 1 is reduced. Can do. Furthermore, consumption of the storage battery of the electric vehicle 2 can be prevented.

  Furthermore, when the reserved operation ends normally, the lock of the charge / discharge connector 19 is maintained after the end of the charging sequence. Since the charging / discharging connector 19 is locked by a latch mechanism, power is consumed when the lock is executed, but power consumption for maintaining the locked state is unnecessary. In the charging / discharging device 1, since the lock of the charging / discharging connector 19 is maintained after the reserved operation is completed, the charging / discharging connector 19 cannot be disconnected from the electric vehicle 2 by a third party. Therefore, since the charging / discharging connector 19 can continue to be normally connected to the electric vehicle 2 until the next reserved operation is started, the charging / discharging device 1 more reliably executes the reserved operation in the next time zone. Can do.

  Although not particularly shown in FIG. 2, the charge / discharge circuit 17 sets the charging rate of the electric vehicle 2 to a preset target charging rate (specified value) before the scheduled operation end time arrives. When it reaches, the charging of the electric vehicle 2 may be stopped. Alternatively, the charging of the electric vehicle 2 may be stopped when a predetermined time has elapsed since the reserved operation was started before the scheduled operation end time arrives. Also in this case, the reserved operation ends normally by executing the processes of S18 to S20.

(Re-execution of chargeable state determination)
The charging / discharging device 1 may determine again whether or not the charging / discharging circuit 17 is in a chargeable state until the start time of the reserved operation arrives after entering the standby state. That is, the process of FIG. 2 may return to S3 instead of S7 when a certain period of time has elapsed since the charging / discharging device 1 enters the standby state and S9 is NO. In this case, the chargeable state determination unit 21 confirms again whether or not the connection confirmation line is conductive (S3). When S3 is YES, the charging / discharging device 1 notifies the user that the charging / discharging circuit 17 is in a chargeable state while maintaining the lock of the charging / discharging connector 19. On the other hand, in the case of NO, the user is notified of an abnormality. At that time, the lock of the charging / discharging connector 19 may be forcibly (automatically) released, or may be released after the pressing operation of the stop button is detected.

  When the charging / discharging device 1 stands by before the start of the reserved operation, the user is likely to be in a place away from the charging / discharging device 1. For example, it is assumed that the user is in the building 3 or is out. Therefore, instead of displaying a notification message on the display panel 13, the charging / discharging device 1 is a user who is away from the charging / discharging device 1 based on the determination result of the chargeable state during standby for the reserved operation. May be notified using means capable of notifying.

  For example, when the charging / discharging device 1 is connected to an indoor display panel (not shown) installed in the building 3, the charging / discharging device 1 displays a notification message on the indoor display panel. Alternatively, when the charging / discharging device 1 has a wireless communication function, the charging / discharging device 1 transmits an e-mail including a notification message in the text to the user's e-mail address.

  Based on these notifications, the user can know again whether or not a situation that prevents execution of the reserved operation has occurred before starting the reserved operation. Therefore, for example, when a notification of occurrence of an abnormality is received, it is possible to appropriately take measures to remove the abnormality before the reserved operation starts. As a result, no abnormality has occurred immediately after the start button is pressed, but the occurrence of a situation in which the reserved operation is not performed after all due to an abnormality occurring while the charging / discharging device 1 is on standby. Can be prevented.

  The charging / discharging device 1 determines that the connection confirmation line is conductive immediately after the start button is pressed (the charging / discharging circuit 17 is in a chargeable state), and then enters the standby state, and then reserves. Until the start time of the operation arrives, it may be periodically determined again whether or not the connection confirmation line is conductive a plurality of times.

  In addition, the user sets both the time zone (charge reservation time zone) in which the charge / discharge device 1 performs the charge operation and the time zone (discharge reservation time zone) in which the charge / discharge device 1 performs the grid connection operation. The charging / discharging device 1 can be set. However, it is necessary to set so that the respective time zones do not overlap. In this case, after the charging / discharging device 1 enters a standby state while maintaining the lock of the charging / discharging connector 19, the charging (charging operation) of the electric vehicle 2 starts when the charging reservation time zone arrives, while the discharging reservation is performed. When the time zone arrives, the electric vehicle 2 starts discharging (system interconnection operation). Therefore, for example, after the reserved charging is completed, the charging / discharging device 1 enters a standby state while maintaining the lock of the charging / discharging connector 19, and then starts the reserved discharge this time when the reserved discharge time zone arrives. When the discharge time zone has passed, the standby state is resumed, and when the reserved charging time zone arrives again, the reserved charging can be started again.

[Embodiment 2]
A second embodiment according to the present invention will be described below with reference to FIG. 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 charge / discharge device 1 according to the present embodiment can charge the electric vehicle 2 by the charge / discharge circuit 17 only by satisfying the condition 1 (determining that the connection confirmation line is on). It is not determined to be in a state. The charging / discharging device 1 executes the charging sequence before starting the reserved operation after confirming that the connection confirmation line is conductive, and the charging / discharging circuit 17 can charge the electric vehicle 2 during the execution. It is determined whether or not at least one of the other conditions 2 to 4 that can be considered to be satisfied. Then, after the condition 1 is satisfied, when at least one of the conditions 2 to 4 is further satisfied, the charge / discharge circuit 17 determines that the electric vehicle 2 is in a chargeable state.

(Reserved driving flow)
FIG. 3 is a flowchart showing a flow of processing when the charging / discharging device 1 according to the embodiment of the present invention performs a reserved operation. Hereinafter, a case where the charging / discharging device 1 performs a reserved operation for charging will be described as an example. However, in the case of a reserved operation for discharging (reserved grid interconnection operation), the charging only changes to discharging, There is no essential difference in the flow of processing.

  Since S1 to S4 in FIG. 3 are the same as S1 to S4 in FIG. 2, detailed description thereof is omitted. When S3 is YES, that is, when the condition 1 is satisfied (determined that the connection confirmation line is conductive), the chargeable state determination unit 21 notifies the charge / discharge circuit 17 to start the charge sequence. To do. Upon receiving this notification, the charging / discharging circuit 17 starts the charging sequence immediately, that is, before the scheduled driving start time arrives (S21). This charging sequence is not for performing charging based on the setting of the reserved operation, but for determining in advance before the start of the reserved operation whether or not the charge / discharge circuit 17 is in a state in which the electric vehicle 2 can be charged. Executed.

  After starting the charging sequence in S21, the charging / discharging circuit 17 sequentially executes each processing procedure included in the charging sequence. At that time, the charging / discharging circuit 17 appropriately notifies the chargeable state determination unit 21 of information regarding the success or failure of each processing procedure in the middle of the regulation in the charging sequence. Based on the notification from the charge / discharge circuit 17, the chargeable state determination unit 21 determines whether the charge / discharge circuit 17 is in a state in which the electric vehicle 2 can be charged (S22).

In the present embodiment, there are a plurality of conditions under which it can be determined during the execution of the charging sequence that the charge / discharge circuit 17 is in a state in which the electric vehicle 2 can be charged. In particular,
Condition 2: CAN communication with the electric vehicle 2 is established. Condition 3: A charge permission signal is received from the electric vehicle 2. Condition 4: The electric vehicle 2 can be actually charged. The user can set in advance to the charging / discharging device 1 whether the charging / discharging device 1 determines the success or failure of the conditions 2 to 4 as the determination condition for the chargeable state. The chargeable state determination unit 21 determines the presence / absence of a chargeable state by determining success or failure up to a set condition. Details of the determination of the chargeable state based on each of the conditions 2 to 4 will be described below.

(Condition 2)
When the condition 2 is set in the charging / discharging device 1, the charging / discharging circuit 17 notifies the chargeable state determination unit 21 of the result of attempting to establish CAN communication with the electric vehicle 2 after the start of the charging sequence. The chargeable state determination unit 21 succeeds in establishing CAN communication with the electric vehicle 2 based on the result of attempting to establish CAN communication with the electric vehicle 2 notified from the charge / discharge circuit 17. It is determined whether or not.

  When the determination result is NO, the chargeable state determination unit 21 determines that the charge / discharge circuit 17 is not in a chargeable state (NO in S22). On the other hand, when the condition 2 is set as the determination condition for the chargeable state, the chargeable state determination unit 21 determines that the charge / discharge circuit 17 is in the chargeable state when the determination result is YES (in S22). YES)

  The charging / discharging circuit 17 establishes CAN communication with the electric vehicle 2 during execution of the charging sequence before the charging / discharging circuit 17 receives the charging permission signal. The charge / discharge circuit 17 receives the charge permission signal before the charge / discharge circuit 17 can actually charge the electric vehicle 2. Therefore, the determination regarding Condition 2 is always performed before the determination regarding Condition 3 and Condition 4. In other words, when the condition 2 is set in the charging / discharging device 1, the determination of the conditions 3 and 4 is unnecessary, and thus the chargeable state determination unit 21 determines whether the charge / discharge circuit 17 is in a chargeable state. Can be determined immediately after the case of determining only on condition 1 (example of the first embodiment).

(Condition 3)
When the condition 3 is set in the charging / discharging device 1, the chargeable state determining unit 21 can charge the charging / discharging circuit 17 only when the condition 2 is satisfied (that is, the CAN communication with the electric vehicle 2 is established). It is not determined to be in a state. After the CAN communication with the electric vehicle 2 is established, the charging / discharging circuit 17 waits for a predetermined time until a charge permission signal is received from the electric vehicle 2. The charge / discharge circuit 17 notifies the chargeable state determination unit 21 of the reception result of the charge permission signal. The chargeable state determination unit 21 determines whether or not the charge / discharge circuit 17 has received a charge permission signal based on the notified result.

  When the determination result is NO, the chargeable state determination unit 21 determines that the charge / discharge circuit 17 is not in a chargeable state (NO in S22). On the other hand, when the condition 3 is set as the determination condition for the chargeable state, the chargeable state determination unit 21 determines that the charge / discharge circuit 17 is in the chargeable state when the determination result is YES (in S22). YES) In this case, since the electric vehicle 2 permits charging / discharging to the charging / discharging circuit 17, the charging / discharging circuit 17 is more electrically connected than the conditions 1 and 2 at the time when such permission is not obtained. It can be more reliably determined whether or not the automobile 2 is in a chargeable state.

(Condition 4)
When the condition 4 is set to the charging / discharging device 1, the chargeable state determination unit 21 can charge the charging / discharging circuit 17 only when the condition 3 is satisfied (that is, the charging permission signal is received from the electric vehicle 2). It is not determined to be in a state. After receiving the charging permission signal from the electric vehicle 2, the charging / discharging circuit 17 further proceeds with the charging sequence and locks the charging / discharging connector 19 to the electric vehicle 2 to complete the preparation for charging. The charging / discharging circuit 17 then attempts actual charging of the electric vehicle 2 and notifies the chargeable state determination unit 21 of the result (charging success or failure). The chargeable state determination unit 21 determines whether or not the charging / discharging circuit 17 has successfully charged the electric vehicle 2 based on the notified result.

  When the determination result is NO, the chargeable state determination unit 21 determines that the charge / discharge circuit 17 is not in a chargeable state (NO in S22). On the other hand, when the condition 4 is set as the determination condition for the chargeable state, the chargeable state determination unit 21 determines that the charge / discharge circuit 17 is in the chargeable state when the determination result is YES (in S22). YES) In this case, since it has been confirmed that the charging of the electric vehicle 2 is actually successful, it can be most reliably confirmed whether or not the charging / discharging device 1 is actually in a state where the electric vehicle 2 can be charged.

(Notification of abnormal occurrence)
When S22 is NO, the chargeable state determination unit 21 determines that the charge / discharge circuit 17 is not in a state in which the electric vehicle 2 can be charged, and displays that fact, the display unit 14, the reserved operation control unit 20, and the charge / discharge circuit. 17 is notified. Upon receiving this notification, the charge / discharge circuit 17 ends the charge sequence (S23). In S <b> 22, when the determination of condition 2 or the determination of condition 3 is performed, the charge / discharge connector 19 is not locked to the electric vehicle 2. Therefore, the charge / discharge circuit 17 ends the charge sequence without locking the charge / discharge connector 19 as it is. On the other hand, if the determination of condition 4 is made in S22, the charge / discharge connector 19 is already locked when S22 becomes NO. In this case, the charging / discharging circuit 17 may end the charging sequence after unlocking the charging / discharging connector 19, or may end the charging sequence while maintaining the locking of the charging / discharging connector 19, and then When the pressing operation of the stop button is detected, the charging / discharging connector 19 may be unlocked.

  After S23, the display unit 14 generates a message for notifying that an abnormality has occurred based on the notification from the chargeable state determination unit 21, and displays the message on the display panel 13. Thereby, the charging / discharging device 1 notifies the user of the occurrence of abnormality (S4). Further, the reserved operation control unit 20 cancels the setting of the reserved operation set in the charging / discharging device 1 based on the notification from the chargeable state determining unit 21. As a result, the process shown in FIG. 3 ends. Therefore, the charging / discharging device 1 does not execute the reserved operation.

  In the present embodiment, the display unit 14 generates an abnormality notification message corresponding to the type of condition set in the charging / discharging device 1 and displays it on the display panel 13. Specific examples of messages for each condition will be described below.

(Condition 2)
When it is determined that the charge / discharge circuit 17 is not in a chargeable state because the charge / discharge circuit 17 cannot establish CAN communication with the electric vehicle 2, the display unit 14 prompts confirmation of the connection state of the charge / discharge connector 19. The message is displayed on the display panel 13. As a message displayed at this time, for example,
・ Check the connection (fitting) state of the charge / discharge connector 19 to the electric vehicle 2 ・ Check the lock state of the charge / discharge connector 19 to the electric vehicle 2 ・ Whether the normal charging cable is connected to the electric vehicle 2 Various messages, such as asking for confirmation, are listed.

(Condition 3)
When it is determined that the charge / discharge circuit 17 is not in a chargeable state because the charge / discharge circuit 17 cannot receive the charge / discharge permission signal from the electric vehicle 2, the display unit 14 prompts confirmation of the state of the electric vehicle 2. Is displayed on the display panel 13. As a message displayed at this time, for example,
・ Check whether the cable for normal charging is connected to the electric vehicle 2 ・ Check whether the electric vehicle 2 has a reservation for normal charging ・ Operation of the air conditioner in the electric vehicle 2 Asking for confirmation as to whether or not there is a reservation-Various messages such as asking for confirmation as to whether or not the ignition of the electric vehicle 2 is turned on may be mentioned. If the content of the abnormality at the time of connection is clear, the display unit 14 may display a coping method for removing the abnormality on the display panel 13. The normal charging is charging of the electric vehicle 2 using a cable (AC cable) for transmitting AC power to the electric vehicle 2.

(Condition 4)
When the display unit 14 determines that the charge / discharge circuit 17 is not in a chargeable state because the charge / discharge circuit 17 could not actually charge the electric vehicle 2, the cause of the charge failure is that the charge / discharge device 1 or A message corresponding to which one of the electric vehicles 2 is present is displayed on the display panel 13. As a message displayed at this time, for example,
-When the abnormality occurs in the charging / discharging device 1, it is notified.-When the SOC (State of Charge) has reached the maximum charge capacity, it is notified.-When the abnormality occurs in the electric vehicle 2. Communicate that.

-When a normal stop instruction is received from the electric vehicle 2, various messages such as notification to that effect are given. If the content of the abnormality that occurs when charging / discharging device 1 attempts to charge electric vehicle 2 is clear, display unit 14 may display a countermeasure for removing the abnormality on display panel 13.

  On the other hand, when S22 is YES, the charge / discharge circuit 17 locks the charge / discharge connector 19 (S24). When condition 4 is set as the determination condition for the chargeable state, charge / discharge connector 19 is already locked to electric vehicle 2 before S22 becomes YES. Therefore, it is not always necessary to lock the charge / discharge connector 19 in S24. The charge / discharge circuit 17 may lock the charge / discharge connector 19 again in S24, or may not additionally control the lock of the charge / discharge connector 19 (lock maintenance). As described above, even when any of the conditions 2 to 4 is set, it is ensured that the charge / discharge connector 19 is always locked to the electric vehicle 2 after the determination of the chargeable state is completed.

  After S24, the charging / discharging circuit 17 starts an ending procedure for ending the charging 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 (S25). Thereafter, the charging / discharging circuit 17 ends the charging sequence while maintaining the lock of the charging / discharging connector 19 (S26). When the determination of condition 4 is made in S22, the charging / discharging circuit 17 first ends the charging of the electric vehicle 2, and then starts a charging sequence end procedure.

  After S <b> 26, the display unit 14 displays a message on the display panel 13 notifying that the charge / discharge circuit 17 is determined to be in a chargeable state based on the notification from the chargeable state determination unit 21. This notifies the user that the charge / discharge circuit 17 is in a chargeable state (S6). Since S6 to S20 in FIG. 3 are the same as S6 to S20 in FIG. 2, detailed description thereof is omitted.

  As described above, the charging / discharging device 1 according to this embodiment determines that the charging / discharging circuit 17 is in a chargeable state during execution of the charging sequence before starting the reserved operation, and then the start time of the reserved operation has arrived. Until then, the charge / discharge connector 19 is kept locked. Thereby, like Embodiment 1, after a user leaves | separates from the charging / discharging apparatus 1, the third party cannot unplug the charging / discharging connector 19 from the electric vehicle 2 by mischief. Therefore, since the charge / discharge connector 19 can be normally connected to the electric vehicle 2 until the reserved operation is started, the charge / discharge device 1 can more reliably execute the reserved operation.

  Moreover, the charging / discharging apparatus 1 which concerns on this embodiment is charged, maintaining the lock | rock of the charging / discharging connector 19, when it determines with the charging / discharging circuit 17 being in a chargeable state during execution of the charging sequence before a reservation driving | operation start. End the sequence and then go to the standby state. Thereby, since the power consumption for maintaining the charge preparation state for charging the electric vehicle 2 becomes unnecessary until a reservation driving | operation is started, the power consumption in the charging / discharging apparatus 1 can be reduced. . Furthermore, consumption of the storage battery of the electric vehicle 2 can be prevented.

(Re-execution of chargeable state determination)
The charging / discharging device 1 may determine again whether or not the charging / discharging circuit 17 is in a chargeable state until the start time of the reserved operation arrives after entering the standby state. That is, the process of FIG. 3 may return to S3 instead of S7 when a certain period of time has elapsed since the charging / discharging device 1 is in a standby state and S9 is NO. In this case, the chargeable state determination unit 21 confirms whether the connection confirmation line is conductive (S3). When S3 is YES, the charging / discharging circuit 17 starts again the charging sequence for determining the chargeable state (S21). The chargeable state determination unit 21 determines again whether or not the charge / discharge circuit 17 is in a chargeable state based on various notifications from the charge / discharge circuit 17 that is executing the charge sequence again (S22). When this determination is YES, the charging / discharging device 1 ends the charging sequence while maintaining the lock of the charging / discharging connector 19, and further notifies the user that the charging / discharging circuit 17 is in a chargeable state. On the other hand, in the case of NO, the charging sequence is terminated, and further the occurrence of abnormality is notified to the user.

  The chargeable state determination unit 21 may skip the determination process of whether or not the connection confirmation line is conductive. In this case, when the user presses the start button, the charging / discharging circuit 17 is charged for determining in advance whether or not the charging / discharging circuit 17 is in a state in which the electric vehicle 2 can be charged before starting the reserved operation. The sequence starts immediately. The chargeable state determination unit 21 determines whether or not the charge / discharge circuit 17 is in a state in which the electric vehicle 2 can be charged based on various notifications from the charge / discharge circuit 17 during execution of the charge sequence.

(Various aspects of the device)
In the first and second embodiments, the example of the charging / discharging device 1 that can perform both charging of the electric vehicle 2 and discharging from the electric vehicle 2 has been described. However, the 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]
The control blocks of the charging / discharging device 1 (in particular, the input unit 12, the display unit 14, the reserved operation control unit 20, the chargeable state determination unit 21, and the connector lock control unit 22) are logics formed in an integrated circuit (IC chip) or the like. It may be realized by a circuit (hardware) 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 device 1 may be a device that is different from the CHAdeMO standard and is compatible with other standards (such as the COMBO standard) for charging or discharging the storage battery of the electric vehicle 2. 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.

1 Charging / discharging device (power control device)
2 Electric vehicle (vehicle)
3 Building 4 Commercial power system 11 Input device 12 Input unit (operation unit)
13 Display panel 14 Display part (status notification part, abnormality occurrence notification part)
15 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 Chargeable state determination unit (determination unit)
22 Connector lock controller (lock controller)
31 Distribution board 32 Load

Claims (14)

A power control device for charging or discharging a storage battery mounted on a vehicle,
A cable for charging or discharging the storage battery;
A connector provided at one end of the cable and connected to the vehicle;
A power control unit for charging or discharging the storage battery through the cable and the connector;
Whether or not the power control unit is capable of charging or discharging the storage battery before a predetermined start condition is established for causing the power control unit to start a series of processing steps for charging or discharging the storage battery. A determination unit for determining whether or not,
The state in which the connector is locked to the vehicle is maintained from when the power control unit is determined to be in a state where the storage battery can be charged or discharged, until the prescribed start condition is satisfied. And a lock control unit.   The power control unit starts a series of processing procedures for charging or discharging the storage battery before a start condition for starting the charging or discharging of the storage battery is established in the power control unit. 2. When the power control unit determines that the storage battery can be charged or discharged during execution of the processing procedure, the series of processing procedures is terminated. Power control device.   When the communication between the power control unit and the vehicle is established while the power control unit is executing the series of processing procedures, the determination unit is configured so that the power control unit can charge or discharge the storage battery. On the other hand, if communication with the vehicle is not established while the power control unit is executing the series of processing steps, it is determined that the power control unit is not in a state in which the storage battery can be charged. The power control apparatus according to claim 2.   When the power control unit receives a signal permitting charging or discharging from the vehicle while the power control unit is executing the series of processing steps, the power control unit can charge the storage battery. If it is determined that the battery is in a dischargeable state, and the power control unit does not receive a signal permitting charging or discharging from the vehicle while the power control unit is executing the series of processing steps, the power The power control apparatus according to claim 2, wherein the control unit determines that the storage battery is not in a chargeable or dischargeable state.   The determination unit can charge the storage battery when the power control unit can actually charge or discharge the vehicle while the power control unit executes the series of processing steps. Alternatively, when it is determined that the vehicle is in a dischargeable state, while the power control unit cannot actually charge or discharge the vehicle while the power control unit is executing the series of processing steps, The power control device according to claim 2, wherein the power control unit determines that the storage battery is not in a chargeable or dischargeable state. The power control unit restarts the series of processing procedures from the end of the series of processing procedures until the prescribed start condition is satisfied,
The determination unit is configured to determine again whether the power control unit is in a state in which the storage battery can be charged or discharged while the power control unit performs the series of processing procedures again. The power control apparatus according to any one of claims 2 to 5. A connection confirmation line for confirming the connection between the vehicle and the connector is provided in the cable.
The determination unit determines that the power control unit is in a state in which the storage battery can be charged or discharged when the connection confirmation line is conductive, while the connection confirmation line is not conductive. The power control apparatus according to any one of claims 1 to 6, wherein the power control unit determines that the storage battery is not in a chargeable state. It further includes a reception unit that receives an instruction for setting the above-mentioned conditions.
The said determination part will determine whether the said electric power control part is in the state which can charge or discharge the said storage battery, if the said instruction | indication is received, The any one of Claims 1-7 characterized by the above-mentioned. The power control device described in 1.   When it determines with the said electric power control part being in the state which can charge or discharge the said storage battery, the state notification part which notifies that is further provided further, The any one of Claims 1-8 characterized by the above-mentioned. The power control device according to item.   10. An abnormality occurrence notifying unit for notifying that an abnormality has occurred when the power control unit determines that the storage battery is not in a chargeable or dischargeable state. The power control apparatus according to any one of the above. An operation unit for stopping charging or discharging of the power control device;
A detection unit for detecting an operation on the operation unit,
The lock control unit determines that the operation unit has been pressed after the power control unit is determined to be in a state where the storage battery can be charged or discharged and until the specified condition is satisfied. The power control apparatus according to any one of claims 1 to 10, wherein when the power is detected, the connector is unlocked with respect to the vehicle.   The power control apparatus according to any one of claims 1 to 11, wherein the prescribed start condition is that a current time coincides with a prescribed start time. The power control unit stops charging or discharging the storage battery when a predetermined termination condition is satisfied,
The lock control unit maintains a state in which the connector is locked to the vehicle after the power control unit stops charging or discharging the storage battery. The power control device described in 1.   The specified end condition is that the current time coincides with the specified end time, that the charge rate of the storage battery has reached a specified value, and that the specified time has elapsed since the specified start condition is satisfied. The power control apparatus according to claim 13, wherein the power control apparatus is at least one of the above.