JP5490834B2 - Charge / feed device, charge / feed management device, energy management system, and charge / feed management method - Google Patents

Description

  The present invention relates to a charger / feeder, a charging / feeding management device, an energy management system, and a charging / feeding management method for managing charging / feeding of a plurality of mobile units on which secondary batteries are mounted.

  2. Description of the Related Art Conventionally, from the viewpoint of global environmental conservation, a mobile body equipped with a secondary battery as a drive source with a small environmental load has attracted attention. Such a mobile body normally receives power from a commercial power source and stores the received power in a secondary battery. And it propels with an electric motor using the electric power accumulate | stored in the secondary battery. In recent years, the capacity of secondary batteries has been increasing, and such secondary batteries are widely installed in, for example, logistics vehicles including turrets (turret trucks) and forklifts, golf carts, automobiles, buses, and the like.

  Usually, a mobile body equipped with a secondary battery is charged from a commercial outlet by a charger installed at a charging stand or a charger mounted on a vehicle, and power is supplied to the charger from a commercial power source. In a commercial power source, since there is generally a power demand peak in the daytime, a power charge is set higher in the daytime than at nighttime. Thus, the following methods have been proposed in order to equalize the power demand and reduce the power cost consumed for charging.

For example, Patent Document 1 describes a method for leveling an electric load at an office. This method uses the power during non-peak power demand at business sites or midnight power to charge each secondary battery of multiple vehicles and release the power stored in the secondary battery at the peak power demand. The power load is leveled.
In Patent Document 2, a bidirectional power converter is provided between the commercial power source and the secondary battery, and the secondary battery mounted on the automobile is charged using the commercial power source during the night power hours. And when the charge power of a secondary battery is surplus, the method of using the surplus power with a load is described.

  Furthermore, as a related technique, Patent Document 3 proposes a power supply method capable of transferring power between electric vehicles. In this method, a secondary battery for an electric vehicle is discharged to extract electric power, and the extracted electric power is supplied to a secondary battery for another electric vehicle.

JP 2007-282383 A JP 2011-200012 A JP 2007-252118 A

  By the way, in a facility in which a plurality of mobile objects equipped with secondary batteries are operated, when the operation modes such as the operation start time and the operation time of the mobile objects are different, it is required to control these charging and feeding in an integrated manner. It is done. For example, as in the case of a sauce operated in the market, the opening time is different in the wholesale area and the intermediate wholesale area, and therefore the operation mode of the sauce is also different. Conventionally, a driver or a dedicated charging worker has charged a large number of sauces collected at a charging stand according to the operation mode. However, depending on the technology of the contractor who grasped each operation mode of multiple sauces, charging was not completed by the start time of the sauce operation, and different electricity charges were taken into account at peak power demand and time zones. Efficient use of power was not possible.

Although Patent Document 1 and Patent Document 2 contribute to leveling of the electric power load, it is difficult to apply to a plurality of moving bodies having different operation modes. In particular, it has been difficult to integrally manage charging and feeding of a large number of moving objects such as sauces used in the market.
Further, Patent Document 3 mainly performs inter-vehicle charging and feeding in response to a power sale request and a charge request, and is not intended for leveling power demand.

  The present invention has been made in view of the above-described circumstances, and is a charge / feed power management technology capable of effectively using the power stored in the secondary battery of the mobile body without affecting the operation of the mobile body. The purpose is to provide.

The charging / feeding management device for a mobile body according to the first invention of the present invention is a charging / feeding management device for a mobile body that manages charging / feeding of a plurality of mobile bodies on which secondary batteries are mounted,
An information acquisition unit that acquires identification information of the mobile body connected to a charger / discharger among the plurality of mobile bodies, a battery state including a current remaining charge, and mobile body information including a next scheduled operation time; and Based on the mobile body information input from the information acquisition section, a schedule creation section that creates a charging / feeding schedule for the mobile body, and charging of the secondary battery mounted on the mobile body according to the charging / feeding schedule or A charge / discharge control unit for controlling discharge, and the schedule creation unit is configured to acquire the current time based on the time acquisition unit, the current time, the scheduled operation time, and the current battery state. Charge / discharge determining means for selecting either charging or discharging or standby of the vehicle, and start time determining means for determining charge / discharge start time of the mobile body, A plurality of power supplies that supply power to the charger / discharger are connected to the charger / discharger, and the schedule generator generates the power from the plurality of power supplies based on the mobile object information and the power charges of the power supplies. A power supply selection means for selecting a power supply for supplying power to the mobile body and a power supply time zone from the power supply;
Further, the schedule creation unit is configured to calculate the virtual power of the electric power stored in the secondary battery from the amount of charge charged in the secondary battery of the mobile body, the charging efficiency at that time, and the power charge at the time of charging. Cost calculating means for calculating a cost, wherein the power supply selection means compares the virtual power costs with each other when there are the plurality of moving objects, and further compares with the power charges of the other power supply Then, an inexpensive power charge is selected as the power supply.

  Thus, when a plurality of power supplies are connected to the charger / discharger, based on the mobile object information and the power charge of each power supply, the power supply that supplies power to the mobile body, and the power supply from the power supply By selecting the power supply time zone, it is possible to suppress the power charge at a low cost and measure the smoothing of the power demand.

  In this case, the power supply selection unit is configured to use the commercial power supply as the power supply for the mobile body having the charging start time in a time zone in which the power charge of the commercial power supply, which is one of the power supplies, is inexpensive. And the power supply time zone is selected as an inexpensive time zone of the power charge, and the mobile unit having the charging start time outside the inexpensive time zone of the power charge is regenerated as the power supply source. An energy type power generator may be selected.

  When using a commercial power supply as one of the power supplies, of course, for mobiles that have a charge start time in a time zone where the power rate of the commercial power source is low, of course, select a time zone where the power rate is low and supply power from the commercial power source. By doing so, the electricity charge can be reduced. On the other hand, for mobiles that have a charging start time outside the time zone where the power charge is cheap, the power charge can be kept low without using expensive power by selecting the regenerative energy generator as the power supply. it can. Further, since the power charge is usually set high during a time period when the power demand is high, the peak power of the commercial power supply can be cut by suppressing the use of the commercial power supply during the high power charge time period.

  Alternatively, in this case, the power supply selection unit may use the power supply as the power supply for the mobile body having the charging start time in a time zone in which the power charge of a commercial power supply that is one of the power supplies is inexpensive. For the mobile unit that selects a commercial power source and selects a cheap time zone of the power charge as the power feeding time zone, and the charging start time is outside the cheap time zone of the power charge, the power supply power source Other moving bodies may be selected.

  Thereby, similarly to the above, the power charge can be reduced by selecting an inexpensive time zone of the power charge and supplying power from the commercial power source. In addition, for mobiles that have a charge start time outside the time zone where the power charges are cheap, by selecting another mobile body as the power supply, the power charges can be kept low without using expensive power. Can do. In addition, it is desirable that the other mobile body is supplied with power from a commercial power source in an inexpensive time zone in the previous and next charging or from a regenerative energy type power generation device.

  Further, according to the present invention, the schedule creation unit is configured to store the electric power stored in the secondary battery from the amount of charge charged in the secondary battery of the mobile body, the charging efficiency at that time, and the power charge at the time of charging. Cost calculating means for calculating the virtual power cost of the power supply, and the power supply selection means compares the virtual power costs with each other when the plurality of the moving bodies exist, Compared with the power charge, an inexpensive power charge is selected as the power supply.

  Thus, the cost calculation means for calculating the virtual power cost of the power stored in the secondary battery from the amount of charge charged in the secondary battery of the mobile body, the charging efficiency at that time, and the power charge at the time of charging. Compared with the virtual power cost of a mobile that is one of a plurality of power supplies, and the power charges of other power supplies such as commercial power supplies and renewable energy power generators, from the viewpoint of power charges By selecting the power supply, it is possible to make the power charge the cheapest. For example, in the case where the charging is normally set from a commercial power source, charging and feeding are performed between the mobile units if the virtual power cost of the mobile unit is the lowest. Therefore, it is possible to reduce the power charge at a lower cost than charging from a commercial power source. Of course, the power charges may be compared between a plurality of other power supplies other than the mobile body, or the virtual power costs may be compared between the mobile bodies.

A charging / feeding management device for a moving body according to a reference invention is a charging / feeding management device for a moving body that manages charging / feeding of a plurality of moving bodies on which secondary batteries are mounted,
An information acquisition unit that acquires identification information of the mobile body connected to a charger / discharger among the plurality of mobile bodies, a battery state including a current remaining charge, and mobile body information including a next scheduled operation time;
Based on the mobile body information input from the information acquisition section, a schedule creation section that creates a charging / feeding schedule for the mobile body, and charging the secondary battery mounted on the mobile body according to the charging / feeding schedule Or a charge / discharge control unit for controlling discharge, and the schedule creation unit is configured to acquire the current time based on the time acquisition unit, the current time, the scheduled operation time, and the current battery state. Charge / discharge determining means for selecting either charging / discharging or standby of the body, and start time determining means for determining charge / discharge start time of the mobile body, and further, as the power supply by the schedule creation unit When commercial power is selected,
When the schedule creation unit estimates that the power demand exceeds or exceeds the contract power of the commercial power source based on information on the surrounding environment in which the mobile unit operates, it is necessary to perform power peak cut When the peak cut determining means and the peak cut determining means determine that the power peak cut is necessary, the mobile power is charged from the commercial power source before the peak time, and power is supplied from the mobile body at the peak time. It further has a peak cut means for performing.

In this way, the mobile power is charged from the commercial power source before the power demand becomes higher than the contract power of the commercial power source, and when the power demand increases, the mobile body is connected to another mobile body or the commercial power source. The power demand can be leveled by supplying power to the power system.
In addition, when a renewable energy type power generation device is used as one of the power supplies, the schedule creation unit may create a charge / feed schedule that takes into account output fluctuations of renewable energy. Specifically, the information acquisition unit acquires power generation status information in the renewable energy power generation apparatus, and creates a charge / power supply schedule based on information including the power generation status information in addition to the above-described mobile body information. Thereby, it becomes possible to smooth the output fluctuation of the regenerative energy type power generation apparatus and to stably supply power to the system.

In the mobile charging / supply management device according to the first aspect of the invention , the information acquisition unit acquires a health state of the secondary battery mounted on the mobile body as the battery state in the mobile body information, and The schedule creation unit may create the charge / power supply schedule in consideration of the health condition.
In this way, the schedule creation unit creates the schedule by taking into account the health condition such as the deterioration state of the secondary battery in addition to the scheduled operation time of the mobile body and the remaining charge of the secondary battery, thereby creating the secondary Battery life can be extended.

Moreover, it is preferable that the energy management system which concerns on 2nd invention is equipped with the some mobile body by which a secondary battery is mounted, the charger / feeder to which the said some mobile body is connected, and the said charging / feeding management apparatus. .
Thereby, it is possible to comprehensively manage charging and feeding in a plurality of mobile objects while effectively using the electric power stored in the secondary battery of the mobile object without affecting the operation of the mobile object.

Moreover, the charger / discharger according to the third invention is a charger / discharger to which a plurality of moving bodies on which a secondary battery is mounted is connected and controls charging / discharging of the moving body,
A mobile body connection end to which the mobile body is connected, a grid connection end to which a power system is connected, a power generation apparatus connection end to which a renewable energy power generation apparatus is connected, and an AC to which one end is connected to the grid connection end A DC converter, a DC-DC converter connected between the AC-DC converter and the moving body connection end, and a charge / feed management device that manages charging / discharging of the moving body,
The charge / power management device includes an information acquisition unit that acquires identification information of the mobile body connected to the mobile body connection end, a battery state including a current remaining charge amount, and mobile body information including a next scheduled operation time; A charge / discharge control unit that controls charging or discharging of the mobile body based on a charge / power supply schedule set based on the mobile body information;
Furthermore, a plurality of power supplies for supplying power to the mobile body are connected to the charger / discharger,
The schedule creation unit is configured to supply power from the plurality of power supplies to the mobile based on the mobile information and the power charge of each of the power supplies, and a power supply time zone from the power supplies Power supply selection means for selecting
Further, the schedule creation unit is configured to calculate the virtual power of the electric power stored in the secondary battery from the amount of charge charged in the secondary battery of the mobile body, the charging efficiency at that time, and the power charge at the time of charging. Cost calculating means for calculating a cost, wherein the power supply selection means compares the virtual power costs with each other when there are the plurality of moving objects, and further compares with the power charges of the other power supply Then, an inexpensive power charge is selected as the power supply.

According to the charger / discharger, the electric power supplied from the electric power system is input to the AC-DC converter at one end and converted from AC to DC, then converted in voltage through the DC-DC converter, and then moved. Power is supplied to the body. On the other hand, the two moving bodies connected to the moving body connecting end are connected via a DC-DC converter, and the voltage can be converted by the DC-DC converter, so that direct-current vehicle-to-vehicle power feeding is possible. is there. By using the charger / discharger with such a configuration, the bidirectional configuration between the two moving bodies, between the moving body and the power system, or between the moving body and the regenerative energy power generation device can be achieved with a simple configuration. Power can be supplied.
Moreover, the charger / discharger of the third invention is an invention related to the charger / discharger corresponding to the first invention, and has the same effects as the first invention .

A charging / feeding management method for a moving body according to a fourth invention is a charging / feeding management method for a moving body that manages charging / feeding of a plurality of moving bodies on which secondary batteries are mounted,
An information acquisition step for acquiring mobile body information including identification information of a mobile body connected to a charger / discharger among the plurality of mobile bodies, a battery state including a current remaining charge level, and a next scheduled operation time; and the operation Creating a schedule for selecting one of charging and discharging of the mobile body based on the scheduled time and the current battery state and the current time, and determining a charging / discharging start time of the mobile body to create a charging / feeding schedule And a charge / discharge control step for controlling charging or discharging of the secondary battery mounted on the mobile body according to the charging / feeding schedule, wherein the schedule creating step acquires a current time; Based on the current time, the scheduled operation time, and the current battery state, the mobile body is not charged or discharged or waited A charge / discharge determination step for selecting the charge and a start time determination step for determining a charge / discharge start time of the mobile body, and a plurality of power supplies for supplying power to the mobile body are provided to the charger / discharger. The schedule creation unit is connected to a power supply that supplies power to the mobile body from the plurality of power supplies based on the mobile object information and a power charge of each of the power supplies. A power supply selection step for selecting a power supply time zone of
Further, the schedule creation unit is configured to calculate the virtual power of the electric power stored in the secondary battery from the amount of charge charged in the secondary battery of the mobile body, the charging efficiency at that time, and the power charge at the time of charging. A cost calculation step of calculating a cost, wherein the power supply selection step compares the virtual power costs when there are the plurality of moving objects, and further compares with a power charge of the other power supply Then, an inexpensive power charge is selected as the power supply.

Moreover, the mobile charging / feeding management method according to the fourth aspect of the invention is an invention relating to the charging / feeding management method of the mobile body corresponding to the first invention, and has the same effects as the first invention .

  ADVANTAGE OF THE INVENTION According to this invention, the effective utilization of the electric power stored in the secondary battery of a mobile body can be aimed at, without affecting the operation | movement of a mobile body.

1 is an overall configuration diagram of an energy management system according to an embodiment of the present invention. It is a figure explaining the 1st Example of a charge-and-power-supply management function. It is a figure explaining the 1st reference example of a charge-and-power-supply management function. It is a figure explaining the 2nd reference example of a charge-and-power-supply management function. It is a figure explaining the 3rd reference example of a charge-and-power-supply management function. It is a figure explaining the 4th reference example of a charge-and-power-supply management function. It is a figure explaining the 5th reference example of a charge-and-power-supply management function. It is a figure explaining the 6th reference example of a charge-and-power-supply management function. It is a figure explaining the 7th reference example of a charge-and-power-supply management function. It is a figure which shows the modification of the energy management system which concerns on this embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, and are merely illustrative examples. Only.

  With reference to FIG. 1, the energy management system which concerns on 1st Embodiment of this invention is demonstrated. Here, FIG. 1 is an overall configuration diagram of the energy management system according to the first embodiment of the present invention. The present embodiment can be widely applied to facilities in which a secondary battery is mounted and a plurality of moving bodies having different operation modes are operated. Examples include logistics vehicles including forklifts, golf carts, automobiles, buses, and the like.

As shown in FIG. 1, the energy management system mainly includes a plurality of vehicles 10 (10A, 10B) on which secondary batteries 11 are mounted, a charger / discharger 20 to which the vehicle 10 is connected, and a charger / discharger 20. And an EMS (Energy Management System) controller that manages charging and feeding.
In FIG. 1, as a power source for the vehicle 10, a power system 41 connected to the commercial power source 40, a solar power generation device 43 that is a regenerative energy power generation device, a private power generation device 46, and charge / discharge are possible. 1 shows a vehicle 10 on which a secondary battery 11 is mounted.

The vehicle 10 includes a secondary battery 11 and includes a battery controller 12 that monitors and controls the state of the secondary battery 11 and a vehicle information storage unit 13 that stores vehicle information.
Here, the secondary battery 11 drives the motor of the vehicle 10 by discharging the charged power. Furthermore, power can be supplied to a load outside the vehicle 10. For example, a lithium ion secondary battery is preferably used as the secondary battery 11.

The battery controller 12 outputs necessary power amount information as power necessary for charging to the control unit 26 of the charger / discharger 20 via the signal line 36 at the start of charging. The required power amount information is a required power according to the free capacity of the secondary battery 11. Further, at the start of discharge, dischargeable power amount information is output to the control unit 26 of the charger / discharger 20 through the signal line 36 as dischargeable power. Further, the battery controller 12 constantly monitors the remaining amount of the secondary battery 11 during charging or discharging, and outputs battery information including the remaining charging amount to the control unit 26 via the signal line 36 as a monitoring result. . Here, the battery state includes, for example, stored power cost, battery health, and the like in addition to the remaining charge.
The vehicle information storage unit 13 stores vehicle information including identification information of the vehicle 10, operation start time information, and battery information including a remaining charge. Further, the vehicle 10 may be equipped with an hour meter, thereby obtaining one operation time or accumulated operation time of the vehicle, and storing the operation time information in the vehicle information storage unit 13. . Furthermore, the power consumption (power consumption rate) information of the vehicle 10 may be acquired and stored in the vehicle information storage unit 13.

The charger / discharger 20 includes a bidirectional AC-DC converter 21, a bidirectional DC-DC converter 22, a control unit 26, wattmeters 23, 24 </ b> A, 24 </ b> B, 25, and connection terminals 31 to 34.
Here, the bidirectional AC-DC converter 21 converts the AC power of the power system 41 connected to the commercial power supply 40 into a DC current / voltage suitable for charging.
The bidirectional DC-DC converter 22 converts the input DC power into a current / voltage suitable for feeding.

The wattmeter 23 is connected between the power system 41 and the AC-DC converter 21, and measures the power value supplied from the power system 41 to the charger / discharger 20 when the mobile body 10 is charged. In addition, it is preferable that the smart meter 42 is interposed between the electric power system 41 and the charger / discharger 20. The smart meter 42 is a power meter having a communication function, and is connected to an EMS controller 50 (described later) via a communication line, and may transmit the current power rate and power consumption to the EMS controller 50.
The wattmeters 24 </ b> A and 24 </ b> B measure electric power values exchanged between the vehicles 10 </ b> A and 10 </ b> B and the bidirectional DC-DC converter 22.
The wattmeter 25 measures the power value supplied from the solar power generation device 43 to the charger / discharger 20. Here, since the electric power generated by the solar power generation device 43 is direct current, the connection end 34 of the solar power generation device 43 is connected to the bidirectional DC-DC converter 22.

  The control unit 26 is connected via the communication line 36 at the same time when the vehicles 10A and 10B and the bidirectional DC-DC converter 22 are connected by the power line 35 during charging and discharging of the vehicles 10A and 10B. Moreover, it connects with the EMS controller 50 mentioned later via a communication line. Then, the vehicle information stored in the vehicle information storage unit 13 and the battery controller 12 is acquired by the information acquisition unit 28, and charging / feeding of the vehicle is controlled based on the charging / feeding schedule from the EMS controller 50. Further, the control unit 26 measures the health state of each secondary battery 11 mounted on the vehicles 10A and 10B connected to the charger / discharger 20, and sends the information to the EMS controller 50 in addition to the vehicle information. May be. In addition, the vehicle 10A, 10B may be provided with means for measuring the health state of the secondary battery 11. In that case, the health state is acquired from the vehicles 10A, 10B together with the vehicle information such as the remaining charge amount, and these information are obtained. Send to EMS controller 50.

The EMS controller 50 is a device that mainly manages charging / feeding of a plurality of vehicles 10, and includes a storage unit 51, an information acquisition unit 52, and a schedule creation unit 53.
Here, the information acquisition unit 52 further acquires the vehicle information acquired by the information acquisition unit 28 of the charger / discharger 20 via a communication line.
The storage unit 51 stores the vehicle information acquired by the information acquisition unit 52. Therefore, the storage unit 51 mainly stores the identification information of the vehicle 10 connected to the charger / discharger 20, the operation start time, the remaining charge amount, and the virtual power cost. Furthermore, it is desirable to store the charge / power supply schedule created by the schedule creation unit 53 and to overwrite and store it every time the charge / power supply schedule is updated.

  The schedule creation unit 53 creates a vehicle charging / feeding schedule based on the vehicle information acquired by the information acquisition unit 52. The schedule creation unit 53 mainly includes a time acquisition unit 54, a charge / discharge determination unit 55, a start time determination unit 56, a quick charge setting unit 57, a power supply selection unit 58, a cost calculation unit 59, a peak. And cutting means 60.

Here, the time acquisition means 54 acquires the current time.
The charging / discharging determining means 55 selects charging, discharging, or standby of the vehicle 10 based on the scheduled operation time and the current remaining charge amount in the vehicle information.
The start time determination unit 56 determines the charge / discharge start time of the vehicle 10 based on the scheduled operation time and the current remaining charge amount in the vehicle information.
The quick charge setting means 57 is discharged by the charge / discharge determination means 55 in the vehicle 10 connected to the charger / discharger 20 when a quick charge request is input or when there is no time delay before the operation start time. Is set to supply power to the vehicle 10 that has output a quick charge request from the vehicle 10 selected.

  The power supply selection means 58 selects a power supply that supplies power to the vehicle 10 from a plurality of power supplies and a power supply time zone from the power supplies based on the vehicle information and the power charges of each power supply. As described above, when a plurality of power supplies are connected to the charger / discharger 20, a power supply that supplies power to the vehicle 10 based on the vehicle information and the power charge of each power supply, and the power supply from the power supply By selecting the power supply time zone, it is possible to suppress the power charge at a low cost and measure the smoothing of the power demand.

  In this case, the power supply selection means 58 selects the commercial power supply as the power supply for the vehicle 10 that has the charging start time in the time zone when the power charge of the commercial power supply 40 is inexpensive and sets the power charge as the power supply time zone. An inexpensive time zone may be selected, and the solar power generation device 43 may be selected as the power supply for the vehicle 10 that has a charging start time outside the inexpensive time zone of the power charge. Of course, for the vehicle 10 having the charging start time in a time zone where the power charge of the commercial power supply 40 is cheap, the power charge can be reduced by selecting a time zone where the power charge is cheap and supplying power from the commercial power supply. On the other hand, for the vehicle 10 whose charging start time is outside the time zone where the power rate is low, the power rate can be kept low without using expensive power by selecting the solar power generation device 43 as the power supply. it can. Further, since the power charge is usually set high during a time period when the power demand is high, the peak power of the commercial power supply can be cut by suppressing the use of the commercial power supply during the high power charge time period.

  Alternatively, for the vehicle 10 that has a charging start time in a time zone in which the power charge of the commercial power supply 40 is inexpensive, the commercial power supply 40 is selected as the power supply power and the inexpensive time zone of the power charge is selected as the power supply time zone. The other vehicle 10 may be selected as the power supply for the vehicle 10 whose charging start time is outside the inexpensive time zone of the power charge. As a result, the power charge can be reduced by selecting a time zone with a low power charge and supplying power from the commercial power supply 40. In addition, for a vehicle 10 that has a charging start time outside a time zone where the power rate is cheap, by selecting another vehicle 10 as a power supply, the power rate can be kept low without using expensive power. Can do. The other vehicle 10 is supplied with power from the commercial power source 40 or the solar power generation device 43 at an inexpensive time zone in the previous charging, and the next charging is performed at an inexpensive time zone or from the solar power generation device. It is desirable to be done.

The cost calculation means 59 calculates the virtual power cost of the electric power stored in the secondary battery from the amount of charge charged in the secondary battery 11 of the vehicle 10, the charging efficiency at that time, and the power charge at the time of charging.
In the case of having such a cost calculation means 59, the power supply selection means 58 includes a virtual power cost of a standby vehicle to which power can be supplied, a commercial power supply 40, a regenerative energy power generator 43, etc. It is also possible to compare the power charges of other power supplies and select the cheapest power supply from these. At this time, when there are a plurality of standby vehicles, the virtual power costs of the standby vehicles are compared with each other, the standby vehicle having the cheapest virtual power cost is selected as a power supply, and charging and feeding are performed between the vehicles. As a result, by charging and feeding between the two vehicles 10A and 10B, it is possible to prevent the power charge from becoming high and to reliably suppress the power charge at low cost.

  In addition, when the information acquisition unit 52 acquires the health state of the secondary battery 11 mounted on the vehicles 10A and 10B as the battery state in the vehicle information, the schedule creation unit 53 considers the health state and sets the schedule. It is preferable to create. Thereby, the lifetime of the secondary battery 11 can be extended.

Furthermore, the information acquisition unit 52 may acquire the power generation status information of the regenerative energy type power generation device in addition to the vehicle information, and create a charging / feeding schedule based on the information.
In general, since there are many regenerative energy type power generation devices that are affected by the surrounding environment, output fluctuation may be large. In particular, in a power generation apparatus using renewable energy such as sunlight and wind power, the output is likely to fluctuate in a short time. When power is supplied from the regenerative energy generator to the power system 41 on the premises, if the power supply fluctuates, the burden on power stabilization on the power supply side of the commercial power supply 40 is increased.
Therefore, in this embodiment, the power generation status information of the solar power generation device 43 that is a renewable energy type power generation device is acquired, and the power supply from the solar power generation device 43 to the power system 41 is leveled based on this information. Create a charging and power supply schedule. For example, when the power generation output of the solar power generation device 43 is small, the power stored in the vehicles 10A and 10B is supplied to the power system 41, and when the power generation output of the solar power generation device 43 is large, the vehicle 10A, Power supply from 10B is stopped, and charging to vehicles 10A and 10B is performed as necessary. Thereby, the output fluctuation of the solar power generation device 43 can be smoothed and the power can be stably supplied to the power system 41.

Next, specific examples and reference examples of the charge management function using the energy management system configured as described above will be described with reference to FIGS. In FIG. 2 to FIG. 9, detailed portions of each device are omitted, and therefore description will be made using the names of FIG. 1.
FIG. 2 is a diagram for explaining a first embodiment of the charge / supply management function. In the first embodiment, the case of delivery of vehicle power between vehicles 10A and 10B, which has a virtual power cost lower than the commercial power charge, is shown.
In FIG. 2, the vehicle 10A and the vehicle 10B have different operation modes. For example, the vehicle 10A is a vehicle that can use nighttime power, that is, a vehicle that operates in the daytime, and the vehicle 10B is a vehicle that cannot use nighttime power, that is, a vehicle that operates at nighttime. Further, in the figure, the case where the vehicle 10B is the object to be charged and the vehicle 10B is another vehicle 10A and the commercial power source 40 are illustrated as the power supply. The EMS controller 50 may recognize a vehicle connected to the charger / discharger 20 other than the vehicle 10B to be charged as a power supply.

  Here, when the other vehicle 10B charges the secondary battery 11 mounted on itself, the amount of charge charged in the secondary battery 11 by the cost calculation means 59, the charging efficiency at that time, and the power at the time of charging. The virtual power cost is calculated from the fee and stored in the vehicle information storage unit 13. This virtual power cost is preferably updated each time the battery is charged. Further, the virtual power cost may not be stored in the vehicle information storage unit 13 but may be stored in the storage unit 51 of the EMS controller 50 together with the identification number of the vehicle 10B.

  The EMS controller 50 selects a power supply for the vehicle 10A from the other vehicle 10B and the commercial power supply 40 that are power supplies. That is, the virtual power cost of the other vehicle 10B is compared with the power charge of the commercial power supply 40, and the one with the lower power charge is selected as the power supply. At this time, when there is a regenerative energy power generation device 43 (see FIG. 1) or a plurality of other vehicles as the power supply, the power charges in the plurality of power supplies may be compared.

As a specific example, the EMS controller 50 selects a power supply for the vehicle 10B as follows. Note that the vehicle 10B is charged in the daytime as described above.
The EMS controller 50 searches for a power supply that can supply power at the lowest cost to the vehicle 10B that has detected the charging request.
On the other hand, when the remaining charge amount at the end of operation is 30%, for example, as the charge / discharge schedule of the vehicle 10A that can use nighttime power, the EMS controller 50 selects discharge from the remaining charge amount and the charge start time. That is, in the EMS controller 50, the vehicle 10A is recognized as a power supply. Therefore, the power supply connected to the charger / discharger 20 is the commercial power supply 40 and the vehicle 10A. The commercial power supply 40 has a power charge set according to the time zone, and the night power charge is usually set at a lower price than the daytime power charge. When the vehicle 10 </ b> A is charged with night power, a virtual power cost is calculated and stored in the vehicle information storage unit 13 or the storage unit 51.

  The EMS controller 50 compares the virtual power cost of the vehicle 10 </ b> A with the daytime power charge of the commercial power supply 40. Here, it is assumed that the virtual power cost is cheaper than the daytime power charge. In this case, the EMS controller 50 selects the vehicle 10A as the power supply. Then, the remaining charge is supplied to the other vehicle 10 </ b> B via the charger / discharger 20. At this time, the vehicle 10B is a vehicle in which night power cannot be used. Therefore, when power is supplied from the vehicle 10A charged with night power, the power stored in the vehicle 10B is also reduced, and the power cost is reduced. Can be planned. The vehicle 10B may be powered from a plurality of units. For example, when the remaining charge amount of the vehicle 10B is 10%, the remaining charge amount becomes 40% by supplying power from the first vehicle 10A. The remaining charge can be further increased by supplying power from the vehicle 10A ′.

FIG. 3 is a diagram illustrating a first reference example of the charge / feed management function. In the first reference example, a case where quick charging is performed from the vehicle 10A to the vehicle 10B is shown.
In FIG. 3, when there is a quick charge request from the vehicle 10B in a state where the vehicle 10A having a surplus charge remaining is connected to the charger / discharger power network that is DC-connected to the same charger / discharger 20, That is, when the vehicle 10B is connected to the vehicle connection end for rapid charging, part or all of charging to the vehicle 10B is performed by rapid charging from the vehicle 10A. Thereby, in the case of charging from the power system 41, even if the cost and system side equipment are limited and difficult, only the equipment on the vehicle 10A, 10B side needs to support rapid charging, and the cost can be reduced. . It can also be easily added to existing equipment.

  Moreover, when the quick charge command switch is provided on the vehicle 10B side, the position information of the charger / discharger 20 may be notified to the vehicle 10B by a switch operation. Specifically, the vehicle 10B includes a wireless communication terminal 110 and an in-vehicle display 111, and the charger / discharger 20 includes a wireless communication terminal 120. When the quick charge command switch of the vehicle 10B is turned ON, the charger / discharger 20 to which the standby vehicle 10A is connected transmits its position information to the vehicle 10B via the wireless communication terminal 120. The vehicle 10 </ b> B receives the position information via the wireless communication terminal 110 and displays it on the in-vehicle display 111. Thereby, when quick charge is required, the charger / discharger 20 that can be surely fast charged can be found, and can be charged quickly.

FIG. 4 is a diagram illustrating a second reference example of the charge / feed management function. In the second reference example, a case where the vehicle 10B that cannot use nighttime power is charged by using the charger / discharger 20 connected to the solar power generation device 43 by a DC bus is shown.
In FIG. 4, a vehicle 10B is a vehicle that cannot use nighttime power. In this case, it is unavoidable to charge in the daytime, but the daytime charging from the commercial power source 40 is costly and may increase the power demand peak. Therefore, power is supplied from the solar power generation device 43 preferentially to the vehicle 10B that cannot use nighttime power. As a result, the power cost can be reduced and the power demand can be leveled. In addition, since power is supplied from a power supply connected by a DC bus, conversion loss due to power conversion can be reduced, and charging can be performed with high efficiency.

FIG. 5 is a diagram illustrating a third reference example of the charge / feed management function. This third reference example shows a case where the remaining power after operation of the vehicle 10A that can use nighttime power is returned to the power system 41 in the daytime.
In FIG. 5, the vehicle 10 </ b> A that can use nighttime power is charged at night, and the power remaining in the secondary battery 11 after operation is returned to the power system 41 via the charger / discharger 20. On the other hand, regarding the vehicle 10B that cannot use nighttime power, even if power remains in the secondary battery 11 after operation, it is not returned to the power system 41. Thereby, the electric power consumption in the daytime in the whole installation can be suppressed.

FIG. 6 is a diagram illustrating a fourth reference example of the charge / feed management function. In the fourth reference example, when the EMS controller 50 estimates whether the power demand exceeds the contract power of the commercial power source 40 based on the environmental information around the vehicle 10, and determines that the contract power is exceeded. Next, set the peak cut. In the peak cut setting, power is supplied to the non-operating vehicle 10A from the power system 41 before the peak of power demand, and power is supplied to the power system 41 from the power charged in the secondary battery 11 at the peak time. Thereby, the vehicle 10A can be used as a storage battery of the electric power system 41, and the peak cut of electric power demand can be achieved.

FIG. 7 is a diagram illustrating a fifth reference example of the charge / feed management function. In this fifth reference example, the vehicle 10A to 10X is switched to a power source or is charged in consideration of the operation time or desired charging completion time, the current remaining charge amount, and the photovoltaic power generation situation in addition to this. Is switched. That is, the charging start time and end time of the vehicle are set based on the operating time of each vehicle 10. For example, the charging time of the vehicle 10A is from 12:00 to 13:00, the charging time of the vehicle 10B is from 13:00 to 13:30, and the charging time of the vehicle 10X is from 22:00 to 1 o'clock. At this time, the connection state of the vehicles 10A to 10X to the charger / discharger 20 may be maintained, and only the charging control is switched. On the other hand, power supply from the commercial power supply 40 is set to night power from 22:00 to 7:00, and power supply from the solar power generation device 43 is set to a time zone in which power generation efficiency is high from 12:00 to 16:00. As a result, it is possible to create an optimal vehicle charging schedule that does not affect the operation of the vehicle and keeps the power charge low.

FIG. 8 is a diagram for explaining a sixth reference example of the charge / supply management function. In the sixth reference example, in an emergency where power from the system is interrupted, all the vehicles 10A to 10X are connected to the charger / discharger 20, and all the charging power stored in all the vehicles 10A to 10X is supplied to the power system 41. To supply. Thereby, electric power can be supplied to electric power utilization apparatuses, such as a refrigerator, a freezer, and an elevator, where electric power supply has the highest priority in the facility.

FIG. 9 is a diagram for explaining a seventh reference example of the charge / supply management function. In the seventh reference example, a plurality of chargers / dischargers 20A to 20C are provided, and vehicles 10A to 10X can be connected to the chargers / dischargers. Furthermore, the power system 41 in the facility is connected to the chargers / dischargers 20A to 20C, and AC power is supplied from the power system 41 to the freezer 101 and the lighting.

Here, the capacity of the secondary battery 11 of the vehicle 10 can be selected in a stepwise manner, but the operation time and the operation load are various, and all the vehicles use the battery capacity fully. I am not doing. Therefore, the operation result data of each of the vehicles 10A to 10C is acquired by an hour meter, and the minimum value of the charge end charge remaining amount is set for each vehicle. And if it becomes impossible to charge efficiently due to transient disturbances such as fluctuations in photovoltaic power generation due to sunshine conditions, power supply at peak power, rapid charging of priority vehicles, etc. Instead of charging up to charging, charging is limited to the minimum value of the remaining charge at the end of charging, and power costs due to charging can be suppressed within a range that does not affect the use of the vehicle.
The plurality of chargers / dischargers 20 </ b> A to 20 </ b> C may be connected to each other by the DC line 48. As a result, for example, when it is desired to rapidly charge the vehicle 10A connected to the charger / discharger 20A, another vehicle can be connected via the DC line 48 even if a standby vehicle capable of rapid charging is not connected to the charger / discharger 20A. Power can also be supplied from a standby vehicle connected to the charger / discharger 20B, 20C. Moreover, when installing the solar power generation device 47, you may connect to the DC line 4, and it can supply electric power to the vehicle from the solar power generation device 47 without going through an inverter etc. by this.

As described above, in the present embodiment, vehicle information of the vehicle 10 connected to the charger / discharger 20 is acquired by the information acquisition unit 52, and based on the acquired vehicle information, the schedule creation unit 53 causes the vehicle 10 to The charging / discharging start time is determined while selecting one of charging, discharging or standby. As a result, the vehicle 10 that can supply power is determined from the charging time (required charging time and charging / discharging start time) and the remaining charge amount, power is supplied from the vehicle 10 that can supply power, and the vehicle 10 that cannot supply power only charges. Thus, it is possible to effectively use the electric power stored in the secondary battery of the vehicle 10 without affecting the operation of the vehicle 10.
Further, by determining the charging / discharging start time of the vehicle 10 based on such vehicle information, charging / discharging can be executed without affecting the operation of the vehicle 10.
Furthermore, since the vehicle information includes the identification information of the vehicle 10, charge / discharge of the plurality of vehicles 10 can be comprehensively managed.

  As mentioned above, although embodiment of this invention was described in detail, it cannot be overemphasized that this invention is not limited to this, In the range which does not deviate from the summary of this invention, various improvement and deformation | transformation may be performed.

For example, in the energy management system shown in FIG. 1, the solar power generation device 43 is exemplified as the power supply, but other renewable energy type power generation devices such as a wind power generation device, a tidal current power generation device, and a geothermal power generation device may be used. In this case, one or a plurality of renewable energy power generators can be used.
Moreover, although the energy management system shown in FIG. 1 showed the example which made the private power generation device 46 cooperate with the electric power system connected to the commercial power supply 40, it is good also as a structure which does not have the private power generation device 46. FIG.

  Furthermore, although the energy management system shown in FIG. 1 showed the example which gave the charging / discharging management function mainly to the EMS controller 50, as shown in FIG. 10, it is good also as a structure given to the charger / discharger 20 side. Here, FIG. 10 is a figure which shows the modification of the energy management system which concerns on this embodiment. In this case, the control unit 26 ′ of the charger / discharger 20 includes a storage unit 81, an information acquisition unit 82, a schedule creation unit 83, and a charge / discharge control unit 84. Furthermore, the schedule creation unit 83 includes a time acquisition unit 91, a charge / discharge determination unit 92, a start time determination unit 93, a quick charge setting unit 94, a power supply selection unit 95, a cost calculation unit 59, a peak cut. Means 100. Each of these parts has the same function as that of the first embodiment, and thus detailed description thereof is omitted. Thus, the charge / supply management function according to the present embodiment may be installed anywhere, and may be installed at different positions as divided units.

DESCRIPTION OF SYMBOLS 10, 10A, 10B Vehicle 11 Secondary battery 12 Battery controller 13 Vehicle information storage part 15 Normal charge end 16 Normal charge plug insertion port 17 Quick charge plug insertion port 20 Charger / Discharger 21 Bidirectional AC-DC converter 22 Both DC-DC converter 26 Control unit 27 Charge / discharge control unit 28 Information acquisition unit 31 Vehicle connection end for normal charging 32 Vehicle connection end for quick charging 33 Power system connection end 34 Photovoltaic power generation connection end 46 Private power generation device 50 EMS controller 51 Storage unit 52 Information acquisition unit 53 Schedule creation unit 54 Time acquisition unit 55 Charge / discharge determination unit 56 Start time determination unit 57 Quick charge setting unit 58 Cost calculation unit 59 Peak cut unit

Claims (7)

A charging / feeding management device for a moving body that manages charging / feeding of a plurality of moving bodies on which a secondary battery is mounted,
An information acquisition unit that acquires identification information of the mobile body connected to a charger / discharger among the plurality of mobile bodies, a battery state including a current remaining charge, and mobile body information including a next scheduled operation time;
Based on the moving body information input from the information acquisition section, a schedule creating section that creates a charging / feeding schedule for the moving body;
A charge / discharge control unit for controlling charging or discharging of the secondary battery mounted on the mobile body according to the charging / feeding schedule;
The schedule creation unit selects one of charging, discharging or standby of the mobile body based on time acquisition means for acquiring the current time, the current time, the scheduled operation time, and the current battery state. Charge / discharge determination means; and start time determination means for determining charge / discharge start time of the mobile body;
Furthermore, a plurality of power supplies for supplying power to the mobile body are connected to the charger / discharger,
The schedule creation unit is configured to supply power from the plurality of power supplies to the mobile based on the mobile information and the power charge of each of the power supplies, and a power supply time zone from the power supplies Power supply selection means for selecting
Further, the schedule creation unit is configured to calculate the virtual power of the electric power stored in the secondary battery from the amount of charge charged in the secondary battery of the mobile body, the charging efficiency at that time, and the power charge at the time of charging. A cost calculating means for calculating the cost;
The power supply selection means compares the virtual power costs when there are a plurality of the moving bodies, and further compares the power charges of the other power supplies with an inexpensive power charge. A charging / feeding management device for a moving body, wherein the charging / feeding management device is selected as a power supply.   The power supply selection means selects the commercial power supply as the power supply for the mobile body having the charging start time in a time zone in which the power charge of the commercial power supply that is one of the power supply is inexpensive. In addition, the power supply time zone is selected as an inexpensive time zone of the power charge, and the mobile body having the charging start time outside the inexpensive time zone of the power charge is used as a regenerative energy type power generation as the power supply. The charging / feeding management device for a moving body according to claim 1, wherein the device is selected.   The power supply selection means selects the commercial power supply as the power supply for the mobile body having the charging start time in a time zone in which the power charge of the commercial power supply that is one of the power supply is inexpensive. In addition, an inexpensive time zone of the power charge is selected as the power supply time zone, and for the mobile body having the charging start time outside the inexpensive time zone of the power charge, the other mobile as the power supply The charge / feed management apparatus for a moving body according to claim 2, wherein the body is selected. The information acquisition unit acquires a health state of the secondary battery mounted on the mobile body as the battery state in the mobile body information, and the schedule creation unit considers the health state and charges and supplies power The charging / feeding management apparatus for a moving body according to claim 1 , wherein a schedule is created . A plurality of mobile units on which secondary batteries are mounted;
A charger / feeder to which the plurality of moving bodies are connected;
An energy management system comprising the charge / feed management device according to claim 1. A plurality of moving bodies on which a secondary battery is mounted are connected, and a charger / discharger that controls charging / discharging of the moving body,
A moving body connecting end to which the moving body is connected;
A grid connection end to which the power grid is connected;
A power generation device connection end to which a renewable energy type power generation device is connected;
An AC-DC converter having one end connected to the system connection end;
A DC-DC converter connected between the AC-DC converter and the moving body connection end;
A charge / feed management device for managing charge / discharge of the mobile body,
The charge / power management device includes an information acquisition unit that acquires identification information of the mobile body connected to the mobile body connection end, a battery state including a current remaining charge amount, and mobile body information including a next scheduled operation time; ,
A charge / discharge control unit that controls charging or discharging of the mobile body based on a charge / feed schedule set based on the mobile body information;
Furthermore, a plurality of power supplies for supplying power to the mobile body are connected to the charger / discharger,
The schedule creation unit is configured to supply power from the plurality of power supplies to the mobile based on the mobile information and the power charge of each of the power supplies, and a power supply time zone from the power supplies Power supply selection means for selecting
Further, the schedule creation unit is configured to calculate the virtual power of the electric power stored in the secondary battery from the amount of charge charged in the secondary battery of the mobile body, the charging efficiency at that time, and the power charge at the time of charging. A cost calculating means for calculating the cost;
The power supply selection means compares the virtual power costs when there are a plurality of the moving bodies, and further compares the power charges of the other power supplies with an inexpensive power charge. A charger / discharger selected as a power supply. A charging / feeding management method for a moving body that manages charging / feeding of a plurality of moving bodies on which a secondary battery is mounted,
An information acquisition step of acquiring mobile body information including identification information of a mobile body connected to a charger / discharger among the plurality of mobile bodies, a battery state including a current remaining charge, and a next scheduled operation time;
Based on the scheduled operation time and the current battery state and the current time, one of charging and discharging of the moving body is selected, and a charging / discharging start time of the moving body is determined to create a charging / feeding schedule. A schedule creation step;
A charge / discharge control step for controlling charging or discharging of the secondary battery mounted on the mobile body according to the charging / feeding schedule,
The schedule creation step selects one of charging, discharging or standby of the mobile body based on a time acquisition step of acquiring a current time, the current time, the scheduled operation time, and the current battery state. A charge / discharge determination step; and a start time determination step for determining a charge / discharge start time of the mobile body,
Furthermore, a plurality of power supplies for supplying power to the mobile body are connected to the charger / discharger,
The schedule creation unit is configured to supply power from the plurality of power supplies to the mobile based on the mobile information and the power charge of each of the power supplies, and a power supply time zone from the power supplies A power supply selection step for selecting
Further, the schedule creation unit is configured to calculate the virtual power of the electric power stored in the secondary battery from the amount of charge charged in the secondary battery of the mobile body, the charging efficiency at that time, and the power charge at the time of charging. A cost calculating step for calculating the cost;
In the power supply selection step, the virtual power costs are compared with each other when the plurality of the moving bodies are present, and compared with the power charges of the other power supplies, the low power charge is A method for managing charge / feed of a moving body, wherein the power supply is selected as a power supply.

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