JP5398866B2 - Charge / discharge control device - Google Patents

Description

  The present invention relates to a charge / discharge control device, and more particularly, to a charge / discharge control device that transfers power between an electric vehicle and an electric power system.

  Concerns over power supply and demand stemming from large-scale disasters and instability of the electric power system due to the massive introduction of renewable energy as an alternative to nuclear power generation that is currently under investigation, have been accumulated in electric vehicles Attention has been focused on a technique for avoiding the above problems by discharging the generated power to the power system.

  With regard to this technology, Patent Document 1 realizes leveling of power demand by enabling both power supply from a household power source of a house to an electric vehicle and power supply and demand from the electric vehicle to the house. A power management system has been disclosed in which predetermined power is secured in an automobile so that it can cope with a sudden outing.

Japanese Patent No. 3985390

  In the conventional power management system as described in Patent Document 1 mentioned above, when a device built in the charge / discharge control device or a device such as an EMS (Energy Management System) or a vehicle provided outside loses its function, The in-vehicle battery installed in the electric vehicle has lost the function of securing sufficient power, making the electric vehicle unusable or not having sufficient mileage, which may impair user convenience. .

  The present invention has been made to solve the above problems, and even when the discharge function or the communication function of the charge / discharge control device is lost, a predetermined amount of electric power of the on-vehicle battery of the electric vehicle is secured. An object of the present invention is to provide a charge / discharge control device that can prevent a disadvantage for a user and can ensure convenience for the user.

The aspect of the charge / discharge control apparatus according to the present invention charges system power supplied from an external power system to an in-vehicle battery mounted on an electric vehicle to be connected, and discharges the electric power stored in the in-vehicle battery. A charge / discharge control device for supplying power to the power system, wherein at least one charging device that converts the system power into power suitable for the electric vehicle, and power stored in the in-vehicle battery, The charging that selects between the charging path connected to the charging apparatus and the discharging path connected to the discharging apparatus for the connection between the electric vehicle and at least one discharging apparatus that converts the electric power suitable for a discharge switching device, the charging device, and a monitoring and control device for controlling and monitoring of the discharge device and the charge and discharge switching device, system pipe installed outside A first communication device that exchanges control signals and data between the system and the monitoring / control device, and a second communication device that exchanges control signals and data between the electric vehicle and the monitoring / control device. comprising a communication device, and each of the charging device and the discharging device has an abnormality detection unit for detecting the status of the operational state and hypofunction of its own, provide a detection information to the monitoring and control device, The monitoring / control device controls the charging device, the discharging device and the charging / discharging switching device based on a charging instruction or discharging instruction given from the outside, and charges / discharges the electric power of the in-vehicle battery. When the loss of the discharge function is detected based on the detection information given from the discharge device, the charge mode for performing only the charge is started from the charge / discharge mode. Proceeds to de, also has a function of detecting the status of the operational state and depression of the first and second communication device, wherein when running the charge and discharge mode, detecting a loss of communication function When it does, it transfers to the said charge mode from the said charge / discharge mode .

  According to the charging / discharging control device of the present invention, when the discharging function of the charging / discharging control device is lost, the charging / discharging mode is shifted to the charging mode, so that a predetermined amount of electric power of the in-vehicle battery built in the electric vehicle is secured. In addition, it is possible to prevent a disadvantage for the user such that the travelable distance of the electric vehicle is remarkably reduced from the user's expected value, or the electric vehicle cannot travel.

It is a block diagram which shows the charging / discharging system | strain of the charging / discharging control apparatus of embodiment which concerns on this invention. It is a block diagram which shows the communication system of the charging / discharging control apparatus of embodiment which concerns on this invention. It is a block diagram which shows the notification system of the charging / discharging control apparatus of embodiment which concerns on this invention. It is a block diagram which shows the structural example 1 of the charging device in the charging / discharging control apparatus of embodiment which concerns on this invention. It is a block diagram which shows the structural example 2 of the charging device in the charging / discharging control apparatus of embodiment which concerns on this invention. It is a block diagram which shows the structural example 1 of the discharge device in the charging / discharging control apparatus of embodiment which concerns on this invention. It is a block diagram which shows the structural example 2 of the discharge device in the charging / discharging control apparatus of embodiment which concerns on this invention. It is a flowchart explaining operation | movement of the charging / discharging control apparatus of embodiment which concerns on this invention. It is a figure which shows an example of the urgency with respect to the functional loss of the charging / discharging control apparatus of embodiment which concerns on this invention.

<Embodiment>
<Device configuration>
FIG. 1 is a block diagram showing a charge / discharge system of a charge / discharge control apparatus 100 according to an embodiment of the present invention.

  A charge / discharge control device 100 shown in FIG. 1 is an electric vehicle (EV) that obtains power by driving a motor using electric power charged in a secondary battery (battery) as a drive source, or a plug that uses a gasoline engine and a motor together. The in-vehicle battery 31 of the electric vehicle 3 including an in-hybrid vehicle (PHEV) is charged with commercial power (system power) supplied from the power system 1 of the electric power company, or the discharged power from the in-vehicle battery 31 is used as power. It has a function of supplying to the system 1.

  Therefore, the charge / discharge control device 100 includes a charging device 11, a discharging device 12, a charging / discharging switching device 13, and a monitoring / control device 15.

  The charging device 11 converts alternating current (AC) power supplied from an external power system 1 into direct current (DC) power or alternating current (AC) power suitable for the electric vehicle 3 to be charged, and is a charge / discharge switching device. 13 and has a function of charging the in-vehicle battery 31 mounted on the electric vehicle 3. In addition, the charging device 11 has a function of constantly monitoring its own operating state, the presence or absence of functional deterioration such as failure and deterioration, and transmitting the result to the monitoring / control device 15.

  The discharge device 12 receives direct current (DC) power stored in the in-vehicle battery 31 mounted on the electric vehicle 3 via the charge / discharge switching device 13 and converts it into alternating current (AC) power suitable for the external power system 1. It has a function of converting and supplying power to the power system.

Based on an instruction from the monitoring / control device 15, the charge / discharge switching device 13 selects which of the charging path connected to the charging device 11 and the discharging path connected to the discharging device 12 is connected to the power line PL. It has a route switching function.

  A charge plug 14 is provided at the tip of the power line PL, and the charge / discharge control device 100 is connected to the charge port 33 of the electric vehicle 3 through the charge plug 14 to charge / discharge the in-vehicle battery 31 of the electric vehicle 3. it can.

  The monitoring / control device 15 monitors and controls the charging device 11, the discharging device 12, and the charge / discharge switching device 13.

  In addition, although the structure provided with the charging device 11 and the discharging device 12 one each was demonstrated to the charging / discharging control apparatus 100 mentioned above, it is not limited to this, Two or more same or different charging devices, There may be two or more of the same or different discharge devices.

  For example, some electric vehicles currently on the market have only one of an AC charging port and a DC charging port, so that the charging device includes an AC charging device and a DC charging device as a discharging device. By providing the AC discharge device and the DC discharge device, it is possible to deal with the electric vehicle as described above.

  FIG. 2 is a block diagram illustrating a communication system of the charge / discharge control apparatus 100 according to the embodiment of the present invention. In addition to the configuration for charge / discharge illustrated in FIG. 1, for communication with the electric vehicle 3. The communication device 16 and the communication device 17 are shown.

  As shown in FIG. 2, in the charge / discharge control device 100, control signals and data are exchanged between the power system management system 4 provided outside and the monitoring / control device 15 via the communication device 16. .

  Here, the power system management system 4 is a system that reduces energy consumption by rationalizing energy use and optimizing facility management based on the energy use situation or the load situation of the power system. This is a system that gives a charge / discharge instruction to the charge / discharge control device 100 in accordance with the load factor. Examples of the system include an EMS (Energy Management System) having a charge / discharge function for a battery such as an EV.

  In addition, the charge / discharge control device 100 exchanges control signals and data between the monitoring / control device 15 and the electric vehicle 3 via the communication device 17.

  Communication between the communication device 17 and the electric vehicle 3 may be performed by exchanging control signals and data by power line communication (PLC: Power Line Communication) in which a communication signal is superimposed on the power line PL connected to the charging plug 14. However, it is also possible to provide a connection terminal for connecting the communication line CL to the charging port 33 so that control signals and data can be exchanged by the communication line CL independent of the power line PL, or both can be used together. 2 shows a configuration in which communication is performed with the in-vehicle communication device 34 of the electric vehicle 3 using the communication line CL independent of the power line PL.

  Note that the monitoring / control device 15 has a function of detecting the operating state of the communication device 16 and the communication device 17 and the presence or absence of functional degradation such as failure and deterioration. That is, since the communication signal is input to the monitoring / control device 15 via the communication device 16 and the communication device 17, the communication signal is received by receiving a failure flag from the communication device 16 and the communication device 17. It is possible to detect the operational state of the device 16 and the communication device 17 and the presence or absence of functional degradation such as failure and degradation, and based on that, it can be determined whether or not the communication function is lost.

  In the charging / discharging control device 100 having such a configuration, the user connects not only the charging mode to the in-vehicle battery 31 of the electric vehicle 3 from the power system 1 by connecting the charging plug 14 to the charging port 33, but also the charging mode. The charge / discharge mode in cooperation with the power system management system 4 is possible.

  That is, in the charge / discharge mode, the power system management system 4 gives a charge instruction or a discharge instruction to the monitoring / control device 15 via the communication device 16 based on the energy usage status or the load status of the power system. In a mode in which the control device 15 controls the charging device 11, the discharging device 12 and the charging / discharging switching device 13 based on the given charging instruction or discharging instruction, and charges or discharges the electric power of the in-vehicle battery 31 of the electric vehicle 3. is there.

  In the charge / discharge mode, for example, when the load of the electric power system 1 is high and the power demand is tight, the electric power stored in the in-vehicle battery 31 of the electric vehicle 3 is a discharge mode for supplying the electric power system 1. If the discharge mode is maintained even when the charge / discharge control function or the communication function of the charge / discharge control device 100 is lost, for example, the discharge continues in a state where the remaining charge amount of the in-vehicle battery 31 cannot be monitored. There is a possibility that sufficient electric power cannot be secured or a sufficient traveling distance cannot be secured.

  Therefore, the monitoring / control device 15 has a function of detecting the loss of the charging / discharging function or the communication function of the charging / discharging control device 100, and when the monitoring / control device 15 detects the loss of the charging / discharging function or the communication function. Controls each part in the charge / discharge control apparatus 100 so as to automatically switch from the charge / discharge mode to the charge mode.

  FIG. 3 is a block diagram showing a notification system of the charge / discharge control apparatus 100 according to the embodiment of the present invention, and shows a display device 18 in addition to the configuration of the communication system shown in FIG. Further, a display device 35 connected to the in-vehicle communication device 34 is shown inside the electric vehicle, and the Internet such as a personal computer connected to a network (not shown) is provided outside the charge / discharge control device 100. A terminal 41 and a mobile terminal 42 such as a mobile phone or a smart phone are shown. Note that the Internet terminal 41 and the mobile terminal 42 are configured to be wirelessly connectable to the power system management system 4.

  By having such a configuration, when the monitoring / control device 15 detects the loss of the charge / discharge function or communication function of the charge / discharge control device 100 and switches from the charge / discharge mode to the charge mode, the charge / discharge control device 100 includes The charging mode is automatically switched from the charging / discharging mode to the user via the display device 18, the display device 35 in the electric vehicle 3, the internet terminal 41 outside the charge / discharge control device 100, and the portable terminal 42. By notifying that the switch has been made, the convenience of the user can be improved.

  In addition, the charging completion time or the like from the user via the display device 18 in the charge / discharge control device 100, the display device 35 in the electric vehicle 3, the Internet terminal 41 outside the charge / discharge control device 100, or the mobile terminal 42 By configuring so that a change instruction regarding a state of charge (SOC) at the completion of charging can be transmitted, the charge / discharge schedule can be changed, and convenience can be improved.

  The structure of each part of the charge / discharge control apparatus 100 described above will be further described with reference to FIGS.

<Configuration Example 1 of Charging Device>
As a configuration example 1 of the charging device 11, a configuration of the charging device 11a is shown in a block diagram in FIG. The charging device 11a shown in FIG. 4 is a DC charging device that converts alternating current (AC) power supplied from the electric power system 1 into direct current (DC) power suitable for the electric vehicle 3 to be connected by the built-in power converter 21. It is.

  In addition, the charging device 11a includes a monitoring sensor 15a (abnormality detection unit) that detects the operating state of the charging device 11a, the presence or absence of a malfunction such as failure and deterioration, and the monitoring sensor 15a monitors the detection result. A function to be given to the control device 15 is provided.

  The monitoring / control device 15 that has received the detection result information from the monitoring sensor 15a determines that there is a problem with the charge / discharge function if the detection result indicates malfunction of the operating state or functional deterioration such as failure or deterioration. Switch from discharge mode to charge mode.

  In the example of FIG. 4, the monitoring sensor 15a is attached to the power converter 21, and the input voltage and output voltage, output current, temperature, failure flag, control power supply voltage, etc. of the power converter 21 are monitored. Thus, the operating state of the power converter 21 and the presence or absence of functional deterioration such as failure and deterioration are detected.

<Configuration Example 2 of Charging Device>
As a configuration example 2 of the charging device 11, a configuration of the charging device 11b is shown in a block diagram in FIG. The charging device 11b shown in FIG. 5 is an AC charging device that converts AC power supplied from the power system 1 into AC power suitable for the electric vehicle 3 connected as it is or by a built-in power converter 22.

  The charging device 11b includes a power converter 22 that converts one or both of the voltage and frequency of AC power supplied from the power system 1, and a path that supplies the AC power supplied from the power system 1 to the power converter 22. The path switching device 22b that selects the path to be given to the bypass line 22a that bypasses the power converter 22, and the path that uses the output of the power converter 22 as the output of the charging apparatus 11b, or the output of the bypass line 22a that is the output of the charging apparatus 11b And a path switching device 22c for selecting a path to be output.

  The AC charging apparatus having such a configuration corresponds to a configuration in which the electric vehicle 3 includes the in-vehicle charger 37, and the supplied AC power is converted into DC power in the vehicle to charge the in-vehicle battery 31. be able to.

  When the AC power supplied from the power system 1 has the same voltage and frequency as the AC power suitable for the electric vehicle 3, the power is supplied to the charge / discharge switching device 13 via the bypass line 22a. When one or both of the voltage and frequency of the supplied AC power are not compatible with the electric vehicle 3 (not compatible with the in-vehicle charger 37), one or both of the voltage and frequency are supplied via the power converter 22. Convert both.

The route between the bypass line 22a and the route through the power converter 22 is selected by the monitoring / control device 15 detecting the frequency and voltage of the system power 1 based on the information from the power system management system 4, Further, it is determined by detecting the specification of the electric vehicle 3 based on the information from the electric vehicle 3 and controlling the path switching devices 22b and 22c.

  Note that the frequency of the power system 1 is determined by the country or region, but the charge / discharge control device 100 having the above-described charging device 11b is effective for an electric vehicle that requires power supply at other frequencies. It is.

  The power converter 22 has been described as converting one or both of the voltage and frequency of the AC power supplied from the power system 1, but converts only the voltage when the need to convert the frequency is low. It is good also as a structure.

  Further, the power converter 22 is not limited to one that realizes both voltage and frequency conversion by one device, and includes a device that converts voltage and a device that converts frequency, and selectively selects both devices. By using it, the case of converting only the voltage, the case of converting only the frequency, or the case of converting both may be supported.

  In addition, the charging device 11b has a monitoring sensor 15b (abnormality detection unit) that detects whether the charging device 11b has an operation state, malfunction or deterioration, and the monitoring sensor 15b monitors the detection result. A function to be given to the control device 15 is provided.

  The monitoring / control device 15 that has received the detection result information from the monitoring sensor 15b indicates that there is a problem with the charge / discharge function if the detection result indicates malfunction of the operating state or functional deterioration such as failure or deterioration. Switch from discharge mode to charge mode.

  In the example of FIG. 5, the monitoring sensor 15b is attached to the power converter 22, and the input voltage and output voltage of the power converter 22, the output current, the frequency of the output current, the temperature, the failure flag, the control power supply voltage, etc. By making it a monitoring target, the operating state of the power converter 22 and the presence or absence of functional deterioration such as failure and deterioration are detected.

<Configuration Example 1 of Discharge Device>
As a configuration example 1 of the discharge device 12, FIG. 6 is a block diagram showing the configuration of the discharge device 12a. The charging device 12a shown in FIG. 6 is a DC discharge device that converts DC power stored in an in-vehicle battery 31 mounted on the electric vehicle 3 into AC power having a voltage suitable for the power system 1 by a built-in power converter 23. It is.

  The AC power output from the power converter 23 can be supplied to the power system 1 by being synchronized with the power system 1 by the system linkage controller 24.

  In addition, the discharge device 12a includes monitoring sensors 15b and 15c (abnormality detection units) that detect the operating state of the discharge device 12a, the presence or absence of functional degradation such as failure and deterioration, and the monitoring sensors 15b and 15c It has a function of giving the detection result to the monitoring / control device 15.

  The monitoring / control device 15 that has received the detection result information from the monitoring sensors 15b and 15c has a problem in the charge / discharge function when the detection result indicates malfunction of the operating state or functional deterioration such as failure or deterioration. Switching from the charge / discharge mode to the charge mode is performed.

  In the example of FIG. 6, the monitoring sensor 15 b is attached to the power converter 23, and the monitoring sensor 15 c is attached to the system linkage controller 24, and the input voltage and output voltage of the power converter 23 and the system linkage controller 24. The output current, temperature, failure flag, control power supply voltage, and the like are monitored, and the operational state of the power converter 23 and the system linkage controller 24, and the presence or absence of functional deterioration such as failure and deterioration are detected.

<Configuration Example 2 of Discharge Device>
As a configuration example 2 of the discharge device 12, a configuration of the discharge device 12b is shown in a block diagram in FIG. The discharge device 12b shown in FIG. 7 converts the DC power stored in the in-vehicle battery 31 mounted on the electric vehicle 3 into AC power having a voltage suitable for the power system 1 as it is or with the built-in power converter 25. AC discharge device.

  The DC power stored in the in-vehicle battery 31 of the electric vehicle 3 is converted into AC power by the in-vehicle charger 37 mounted on the electric vehicle 3 and output from the charging plug 14, and is discharged through the charge / discharge switching device 13. 12b.

  The discharging device 12b includes a power converter 25 that converts one or both of the voltage and frequency of AC power supplied from the electric vehicle 3, and a path that supplies the AC power supplied from the electric vehicle 3 to the power converter 25. A path switching device 25b that selects a path to be given to the bypass line 25a that bypasses the power converter 25, and a path that uses the output of the power converter 25 as an output of the discharge device 12b, or an output of the bypass line 25a of the discharge device 12b. And a path switching device 25c for selecting a path to be output. In addition, the system | strain cooperation controller 24 is provided in the back | latter stage of the path | route switching apparatus 25c.

  In the AC discharge device having such a configuration, the electric vehicle 3 has the in-vehicle charger 37, and the supplied AC power is converted into DC power in the vehicle to charge the in-vehicle battery 31. It is possible to correspond to a configuration in which the DC power stored in 31 can be converted into AC power and output.

  When the AC power supplied from the electric vehicle 3 has the same voltage and frequency as the AC power of the power system 1, the AC power is supplied to the system linkage controller 24 via the bypass line 25 a and supplied from the electric vehicle 3. When one or both of the voltage and frequency of the AC power are not compatible with the AC power of the power system 1, one or both of the voltage and frequency are converted via the power converter 25.

The route between the bypass line 25a and the route through the power converter 25 is selected by the monitoring / control device 15 detecting the specification of the electric vehicle 3 based on the information from the electric vehicle 3, and the power system. This is determined by detecting the frequency and voltage of the system power 1 based on information from the management system 4 and controlling the path switching devices 25b and 25c.

  The frequency of the power system 1 is determined by the country or region, but the charge / discharge control device 100 having the charging device 12b described above is effective for an electric vehicle that requires power supply at a frequency other than this. It is.

  The power converter 25 has been described as converting one or both of the voltage and frequency of the AC power supplied from the electric vehicle 3. However, when the necessity for converting the frequency is low, only the voltage is converted. It is good also as a structure.

  Further, the power converter 25 is not limited to one that realizes both voltage and frequency conversion by one device, and includes a device that converts voltage and a device that converts frequency, and selectively selects both devices. By using it, the case of converting only the voltage, the case of converting only the frequency, or the case of converting both may be supported.

  In addition, the discharge device 12b includes monitoring sensors 15b and 15c that detect the operating state of the discharge device 12b and the presence or absence of functional deterioration such as failure and deterioration. The monitoring sensors 15b and 15c monitor and detect the detection results. It has a function to be given to the control device 15.

  The monitoring / control device 15 that has received the detection result information from the monitoring sensors 15b and 15c has a problem in the charge / discharge function when the detection result indicates malfunction of the operating state or functional deterioration such as failure or deterioration. Switching from the charge / discharge mode to the charge mode is performed.

  In the example of FIG. 7, the monitoring sensor 15 b is attached to the power converter 25, and the monitoring sensor 15 c is attached to the system linkage controller 24, and the input voltage and output voltage of the power converter 25 and the system linkage controller 24. By detecting the output current, frequency of output current, temperature, failure flag, control power supply voltage, etc., it is possible to detect whether the power converter 25 and the system linkage controller 24 are functioning, such as malfunctions and deterioration. doing.

<Operation>
<Operation in charge / discharge mode>
The operation of the charge / discharge control apparatus 100 described above will be described using the flowchart shown in FIG. 8 with reference to FIGS.

  As shown in FIG. 8, when the charge / discharge control device 100 starts the control operation, for example, when the power is turned on, first, the monitoring / control device 15 operates the operation state of the communication device 16 and the communication device 17, While detecting the presence or absence of functional deterioration such as failure and deterioration, and receiving the information of the detection result of presence or absence of functional deterioration such as operating state, failure and deterioration, given from the charging device 11 and discharging device 12, based on them, It is determined whether or not the communication function is lost (step S1), whether or not the charging function is lost (step S2), and whether or not the discharging function is lost (step S3). When it is determined that none of the functions has been lost, the mode shifts to the charge / discharge mode (step S4).

  When the monitoring / control device 15 receives a charge / discharge instruction from the power system management system 4 outside the charge / discharge control device 100 in the charge / discharge mode (step S5), the monitoring / control device 15 determines whether it is a charge instruction or a discharge instruction. If it is a charge instruction, the charging device 11 and the charge / discharge switching device 13 are controlled to charge the vehicle-mounted battery 31 of the electric vehicle 3 (step S7). On the other hand, when the instruction is a discharge instruction, the discharge device 12 and the charge / discharge switching device 13 are controlled to execute a discharge for supplying the electric power stored in the in-vehicle battery 31 of the electric vehicle 3 to the power system 1 (step S8). ).

  After performing charging or discharging, the monitoring / control device 15 determines whether or not the in-vehicle battery 31 satisfies an end determination condition defined by a predetermined charge amount or a predetermined remaining charge (step S9) When the termination determination condition is satisfied, the charging / discharging is terminated. However, when the termination determination condition is not satisfied, the operations after step S1 are repeated. Note that the determination operation in step S9 is repeated at predetermined time intervals, for example.

<Operation when communication function is lost>
When it is determined in step S1 that the communication function has been lost, the monitoring / control device 15 checks which of the communication device 16 and the communication device 17 has failed (step S11). Hereinafter, the communication device 16 is referred to as the communication device 1, and the communication device 17 is referred to as the communication device 2.

  The communication device 1 exchanges control signals and data between the power system management system 4 and the monitoring / control device 15, and the communication device 2 transmits control signals and data between the electric vehicle 3 and the monitoring / control device 15. Send and receive data.

  Therefore, if it is determined in step S11 that a failure has occurred in the communication device 1, the monitoring / control device 15 determines that the communication function with the power system 1 has been lost (step S12), and charge / discharge control. The function loss information such as the operation state, communication state, and failure state of the device is displayed on the display device 18 in the apparatus 100 and the display device 35 in the electric vehicle 3 (step S13), and the process proceeds to step S31. Hereinafter, the display device 18 is referred to as the display device 1, and the display device 35 is referred to as the display device 2.

  On the other hand, when it is determined in step S11 that a failure has occurred in the communication device 2, the monitoring / control device 15 determines that the communication function with the electric vehicle 3 has been lost (step S14).

  Then, the monitoring / control device 15 determines the degree of urgency for dealing with the user based on the state of loss of function (step S15), and determines the level of urgency (step S16).

  If it is determined in step S16 that the degree of urgency is low, the function loss information such as the operation state, communication state, and failure state of the device is displayed on the display device 18 in the charge / discharge control device 100 and the display device 35 in the electric vehicle 3. Is displayed (step S18), and the process proceeds to step S33.

  On the other hand, if it is determined in step S16 that the degree of urgency is high, the mode is changed to a charging mode (step S17), and functions such as the operation state, communication state, and failure state of the device are added to the Internet terminal 41 and portable terminal 42 of the user. Loss information is communicated (step S19).

  In this way, prior to the transition from charge / discharge mode to charge mode, the urgency of dealing with loss of function is evaluated, and the method of notifying function loss information to the user is changed according to the evaluated urgency. Respond based on the state of loss.

  In addition, by receiving notification of the loss of function information, the user can know that the travelable distance of the electric vehicle 3 may be significantly reduced from the user's expected value, or the electric vehicle may be unable to travel. Since the user can change the travel schedule and route of the electric vehicle 3 based on the loss information, convenience for the user can be ensured.

  Here, an example of the urgency with respect to the functional loss of the charge / discharge control apparatus 100 is shown in FIG. In FIG. 9, the type of lost function, urgency, failure event, and notification method are shown as a table.

  For example, when the charging function is lost, the emergency level is always determined as “high”, and the user is notified via the Internet terminal 41 and the portable terminal 42.

  In addition, when the discharging function is lost, the charging state (SOC) at the completion of charging instructed by the user or the charging completion time cannot be achieved, and the malfunction of the charging function is detected The degree of urgency is determined as “high”, and the user is notified via the Internet terminal 41 and the portable terminal 42. Even when the discharge function is lost, if the charge state (SOC) at the completion of charge and the charge completion time instructed by the user can be achieved, it is determined that the degree of urgency is “low”, and the display devices 1 and 2 Notify the user via

  In addition, when the communication function is lost, the charging state (SOC) at the completion of charging instructed by the user or the charging completion time cannot be achieved, and the malfunction of the charging function is detected The degree of urgency is determined as “high”, and the user is notified via the Internet terminal 41 and the portable terminal 42. Even when the communication function is lost, when the charge state (SOC) at the completion of charging and the charge completion time instructed by the user can be achieved, it is determined that the urgency is “low”, and the display devices 1 and 2 Notify the user via

  Here, the description returns to FIG. In step S19, the user who has been notified of the operation state, communication state, and failure state of each device of the charge / discharge control device 100 via the display device 1 and the display device 2 is charged with the charging completion time, the SOC at the time of charging completion, etc. The change instruction regarding the charging pattern can be performed via any one of the display device 1, the display device 2, the Internet terminal 41, and the mobile terminal 42.

  For example, when the in-vehicle battery 31 of the electric vehicle 3 is not fully charged by the scheduled departure time, the setting can be changed so that the charged state is not 80% but 80%. In addition, when the display device 1 or the display device 2 has a touch panel function, the above-described change may be performed via the touch panel. What is necessary is just to make it the structure which changes by operating a key.

  The monitoring / control device 15 of the charge / discharge control device 100 confirms the presence / absence of a charge pattern change instruction from the user (step S21), and when there is a change instruction, starts charging with the charge pattern indicated by the user. (Step S22).

  For example, if the user's instruction is not full charge but change to 80% charge state, the charge state is monitored until reaching 80% charge state, and if it is determined that charging is complete (step S23). ), Charging and discharging are terminated.

  Thus, by setting the charging pattern instructed by the user as the target value, it is possible to determine the amount of charging necessary for the user, and to ensure convenience for the user.

  As described above, according to the charging / discharging control device 100 according to the present invention, when the communication function is lost, the charging / discharging mode is shifted to the charging mode, so that electric power necessary for traveling of the electric vehicle 3 is ensured. It becomes possible to do. As a result, it is possible to prevent the in-vehicle battery 31 from becoming empty and making it impossible to start the electric vehicle 3, running distance being insufficient and charging required during traveling, and inability to travel during traveling. .

<Operation when charging function is lost>
If it is determined in step S2 that the charging function has been lost, the subsequent charging cannot be performed, and the monitoring / control device 15 sends the device operating status and communication status to the Internet terminal 41 and portable terminal 42 of the user. Then, the failure status is communicated (step S41), and the charging / discharging is terminated.

  As described above, when the charging function is lost, the urgency level is always “high”, so the urgency level is not determined.

<Operation when the discharge function is lost>
If it is determined in step S3 that the discharge function has been lost, and if the operation status, communication status, and failure status of the device are displayed on the display devices 1 and 2 in step S13, the user is determined based on the function lost status. The urgent level of the contact is determined (step S31), and the level of the urgent level is determined (step S32). If it is determined in step S32 that the degree of urgency is low, the charging / discharging mode is shifted to the charging mode (step S33), and the on-vehicle battery 31 of the electric vehicle 3 is charged (step S34). In addition, also when the operation state, communication state, and failure state of the device are displayed on the display devices 1 and 2 in step S18, the process proceeds to step S33 to shift from the charge / discharge mode to the charge mode.

  In the charging mode, if the user has set the charging completion time or charging state in advance, charging is performed using that as a target value.If the user has not set the charging completion time or charging state, the target value is set. When the charging state is set, for example, the charging / discharging control device 100 and the electric vehicle 3 can tolerate the maximum charging state that does not place a burden on the in-vehicle battery 31 and can ignore the functional degradation. It shall be charged with a charging current.

  Thereby, the amount of charge can be determined easily, so that the burden on the user can be reduced, and the burden on the in-vehicle battery 31 is not applied during charging, and the deterioration of the function can be prevented.

  In the following, for convenience, description will be made assuming that the in-vehicle battery 31 of the electric vehicle 3 is fully charged as a target value. However, since the charging function of the in-vehicle battery 31 may be reduced when fully charged, in practice, The amount of charge is less than full charge.

  The monitoring / control device 15 monitors the state of charge until it reaches full charge. When it is determined that charging is complete (step S35), charging / discharging is terminated, but if charging is not complete, charging is performed. To continue. Note that the determination operation in step S35 is repeated at predetermined time intervals, for example.

  If it is determined in step S32 that the degree of urgency is high, the process proceeds to step S19 to notify the Internet terminal 41 and portable terminal 42 of the user of the operation state, communication state, and failure state of the device, and step S20 and subsequent steps. Execute the operation.

  The present invention can be freely combined with each other within the scope of the present invention, or can be appropriately modified or omitted.

DESCRIPTION OF SYMBOLS 1 Power system, 3 Electric vehicle, 4 Power system management system, 11 Charging apparatus, 12 Discharge apparatus, 13 Charge / discharge switching apparatus, 15 Monitoring / control apparatus, 16, 17 Communication apparatus, 100 Charge / discharge control apparatus.

Claims (8)

A charging / discharging control device for charging system power supplied from an external power system to an in-vehicle battery mounted on an electric vehicle to be connected, and discharging the electric power stored in the in-vehicle battery to supply the power system There,
At least one charging device for converting the grid power into power suitable for the electric vehicle;
At least one discharge device that converts electric power stored in the in-vehicle battery into electric power suitable for the grid power;
A charge / discharge switching device that selects a connection with the electric vehicle via a charging path connected to the charging device or a discharging path connected to the discharging device;
A monitoring / control device for controlling and monitoring the charging device, the discharging device and the charging / discharging switching device;
A first communication device that exchanges control signals and data between a system management system installed outside and the monitoring / control device;
A second communication device that exchanges control signals and data between the electric vehicle and the monitoring / control device ,
Each of the charging device and the discharging device has an abnormality detecting unit that detects the operating state of the own device and the presence or absence of functional degradation, and provides detection information to the monitoring / control device,
The monitoring / control device includes:
When the charging device, the discharging device, and the charging / discharging switching device are controlled based on a charging instruction or discharging instruction given from the outside, and a charge / discharge mode for charging or discharging the electric power of the in-vehicle battery is executed. When the loss of the discharge function is detected based on the detection information given from the discharge device, the charge / discharge mode is shifted to the charge mode in which only the charge is performed , and the first and second communication devices If the loss of communication function is detected when the charge / discharge mode is executed when the charge / discharge mode is executed, the mode is shifted from the charge / discharge mode to the charge mode. A charge / discharge control device. The monitoring / control device includes:
After shifting from the charge / discharge mode to the charge mode, charge based on a predetermined target value,
The charge / discharge control device according to claim 1 , wherein the charging is terminated after reaching the predetermined target value . The predetermined target value is
The charge / discharge control device according to claim 2 , wherein the charge-discharge control device is in a maximum charged state that does not impose a burden on the in-vehicle battery and can ignore a function deterioration . The monitoring / control device includes:
When the loss of the communication function due to the malfunction of the second communication device is detected, and after shifting from the charge / discharge mode to the charge mode, charging is performed based on a predetermined target value,
Charging is terminated after reaching a predetermined target value, the charge and discharge control device according to claim 1. The predetermined target value is
The charge / discharge control apparatus according to claim 2, wherein the charge / discharge control apparatus has a preset value . The predetermined target value is
It is the maximum state of charge that does not place a burden on the in-vehicle battery and can ignore the functional degradation,
The monitoring / control device includes:
Charging with the maximum charging current that can be allowed by the charge / discharge control device and the electric vehicle based on the information on the state of charge of the in-vehicle battery received from the electric vehicle immediately before the failure of the second communication device. and wherein estimating the maximum time to reach the charge state when the continue charging until the time has elapsed, determines that the time has reached the predetermined target value by elapsed,請 Motomeko 4. The charge / discharge control device according to 4. The monitoring / control device includes:
Prior to the transition from the charge / discharge mode to the charge mode, evaluate the urgency of dealing with the loss of function,
The charging / discharging control apparatus of Claim 2 or Claim 4 which changes the method of the notification of the loss-of-function information to the outside according to the evaluated urgency level . The predetermined target value is
The charge / discharge control device according to claim 7 , which is given from the outside in response to the loss of function information .

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