WO2013122073A1 - Power charging and supplying device, power charging and supplying management device, energy management system, and power charging and supplying management method - Google Patents

Abstract

An industrial vehicle power charging and supplying management device manages the charging and supplying of power to a plurality of industrial vehicles (10 (10A, 10B)) on which secondary batteries (11) are mounted. The power charging and supplying management device comprises: an information acquiring unit (52) for acquiring industrial vehicle information including the identification information, current battery states, and next operation schedule times of the industrial vehicles (10) connected to a charging and discharging device (20); a schedule creating unit (53) for, based on the industrial vehicle information, creating the power charging and supplying schedules of the industrial vehicles; and a charging and discharging control unit (27) for, according to the power charging and supplying schedules, controlling the charging or discharging of the secondary batteries (11) mounted on the industrial vehicles (10). The schedule creating unit (53) has: a time acquiring means (53) for acquiring current time; a charging and discharging determination means (54) for, based on the current time, the operation schedule times, and the current battery states, selecting the charging, discharging, or standby of the industrial vehicles; and a start-time determination means (55) for determining the charging and discharging start times of the industrial vehicles.

Description

Charging and feeding device, charging and feeding management device, energy management system, and charging and feeding management method

The present invention relates to a charging / charging device and charging / charging management device that manages charging / discharging of a plurality of industrial vehicles mounted with secondary batteries, an energy management system, and a charging / charging management method.

BACKGROUND ART Conventionally, from the viewpoint of global environmental protection, attention has been focused on industrial vehicles equipped with secondary batteries as a driving source with a small environmental load. Such an industrial vehicle normally receives power from a commercial power source, and stores the received power in a secondary battery. Then, the motor is propelled by using the power stored in the secondary battery. In recent years, the capacity of secondary batteries has been increased, and such secondary batteries are widely mounted on, for example, distribution vehicles including turrets (turret trucks) and forklifts, construction machines such as motor graders, and the like.

Usually, an industrial vehicle equipped with a secondary battery is charged from a commercial outlet by a charger installed in a charging stand or an on-board charger, and power is supplied to the charger from a commercial power source. In the commercial power source, since the power demand peak generally exists in the daytime, the power rate is set higher in the daytime than in the nighttime. Therefore, the following methods have been proposed in order to level power demand and reduce the power cost consumed for charging.

For example, Patent Document 1 describes a method of leveling the power load in a business office. In this method, each secondary battery of a plurality of vehicles is charged using power at non-peak power demand at the business site or late-night power, and the power stored in the secondary battery is released at the time of peak power demand. We try to level the power load.
Further, in Patent Document 2, a bidirectional power converter is provided between a commercial power supply and a secondary battery, and the secondary battery mounted on a car is charged using the commercial power supply during the nighttime power period. In addition, when the charging power of the secondary battery is surplus, a method of using the surplus power as a load is described.

Furthermore, as a related technology, Patent Document 3 proposes a power supply method capable of exchanging power between electric vehicles. In this method, the vehicle secondary battery of the electric vehicle is discharged to extract power, and the obtained power is supplied to the vehicle secondary battery of another electric vehicle.

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

By the way, in a facility where a plurality of industrial vehicles equipped with secondary batteries are operated, if the operation start time, the operation time of the industrial vehicle, and the operation mode such as the operation time zone are different, these charging and feeding are integrally controlled. It is required to For example, as in the case of TALE operated in the market, the opening time is different between the wholesale area and the mid-career area, and hence the operation start time, the operation time, the operating time zone and the like of the TALE are also different. Heretofore, the driver or the person in charge of charging work charges a large number of tares collected at the charging station according to the operation start time, the operation time, the operation time zone, and the like. However, the part that relies on the technology of the vendor who grasped each operation start time, operation time, operation time zone, etc. of multiple tares is large, and charging can not be completed by the operation start time of the tare, and power demand peak or It was not possible to make efficient use of power in consideration of different power rates in the time zone.

Although patent documents 1 and patent documents 2 contribute to equalization of electric power load, it is difficult to apply to a plurality of industrial vehicles from which operation start time, operation time, an operating time zone, etc. differ. In particular, it has been difficult to manage in an integrated manner the charging and feeding of many industrial vehicles such as tare 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 to equalize the power demand.

The present invention has been made in view of the above-mentioned circumstances, and a charging / feeding management technology capable of effectively utilizing the power stored in the secondary battery of the industrial vehicle without affecting the operation of the industrial vehicle Intended to provide.

The charging and feeding management device for an industrial vehicle according to the present invention is a charging and feeding management device for an industrial vehicle that manages charging and feeding of a plurality of industrial vehicles mounted with secondary batteries, and among the plurality of industrial vehicles, charging and discharging management device An information acquisition unit for acquiring industrial vehicle information including identification information of the industrial vehicle connected to an electric appliance, a battery state including a current charge remaining amount, and a next operation scheduled time; and the industry input from the information acquisition unit A schedule creation unit that creates a charging / feeding schedule of the industrial vehicle based on vehicle information; and a charge / discharge control unit that controls charging or discharging of the secondary battery mounted on the industrial vehicle according to the charging / charging schedule And the schedule creating unit is configured to obtain the current time, and the industrial vehicle based on the current time, the scheduled operation time, and the current battery state. And having the charging and discharging determining means for selecting either the charging or discharging, or standby, and a start time determining means for determining a discharge start time of the industrial vehicle.

According to the charging and feeding management device of the industrial vehicle, the industrial vehicle information of the industrial vehicle connected to the charger / discharger is acquired by the information acquiring unit, and the industrial vehicle is processed by the schedule creating unit based on the acquired industrial vehicle information. And either charging or discharging or standby is selected and the charge / discharge start time is determined. As a result, the industrial vehicle capable of supplying power is determined from the charging time (required charging time and charging start time) and the battery state (for example, the remaining amount of charging), and power can be supplied from the powered industrial vehicle and can not be supplied. By charging only the vehicle, it is possible to effectively use the power stored in the secondary battery of the industrial vehicle without affecting the operation of the industrial vehicle. That is, based on the battery information including the current charge remaining amount, it can be determined whether or not the power that can be supplied to the other remains in the secondary battery. Further, the required charging time can be estimated from the current remaining charge amount, and from the required charging time and the scheduled operation time of the industrial vehicle, a surplus time excluding the time spent for charging can be obtained. Therefore, it is possible to judge that the industrial vehicle can be used to feed power within the surplus time if the remaining charge amount is sufficient for feeding and the surplus time. Further, by determining the charge / discharge start time of the industrial vehicle based on such industrial vehicle information, charge / discharge can be performed without affecting the operation of the industrial vehicle. Furthermore, when the industrial vehicle information includes the identification information of the industrial vehicle, charging / discharging of a plurality of industrial vehicles can be comprehensively managed.
The current battery state includes, for example, the cost of stored electricity, the state of health of the battery, and the like, in addition to the charge remaining amount. In addition to the industrial vehicle information, the information acquisition unit may acquire a power generation state or the like if a regenerative energy type power generation device exists as one of the power demand or the power supply to the industrial vehicle. The schedule creation unit can create a schedule based on these pieces of information.

In the charging and feeding management device for an industrial vehicle, the schedule creating unit may receive the quick charge request from the industrial vehicle by the information acquisition unit, or may select the quick charge by the charge / discharge determination unit. Among other industrial vehicles connected to the charger / discharger, there is further provided a rapid charge setting means for supplying power to the industrial vehicle that has output the rapid charge request from the industrial vehicle whose discharge can be selected by the charge / discharge determination means You may

In general, when performing quick charging from a power system connected to a commercial power source, it is necessary to add a transformer or storage battery or the like compatible with a large amount of power to the charger / discharger. Therefore, the equipment cost is increased, and the installation of such additional equipment may be difficult when there is a restriction on the equipment on the power system side. Therefore, by performing rapid charging between industrial vehicles, it is possible to reduce facility investment on the power system side, and also to use existing facilities without installing new additional facilities on the power system side. .

In the charging and feeding management device for an industrial vehicle, a plurality of power supplies for supplying power to the industrial vehicle are connected to the charger / discharger, and the schedule creation unit is configured to receive information on the industrial vehicle and the power of each power supply. The power supply system may further include a power supply selection unit that selects a power supply that supplies power to the industrial vehicle from the plurality of power supplies, and a power feeding time zone from the power supply based on a charge.

Thus, when a plurality of power supplies are connected to the charger / discharger, a power supply that supplies power to the industrial vehicle based on the industrial vehicle information and the power rate of each power supply, and the power supply from the power supply By selecting the power supply time zone, the power rate can be reduced at a low price, and the smoothing of the power demand can be measured.

In this case, for the industrial vehicle having the charge start time in a time zone in which the electricity charge of the commercial power source which is one of the power sources is low, the commercial power source as the power source is the commercial power source. For the industrial vehicle where the charge start time is outside the inexpensive time slot of the power charge as the power feeding time zone and the cheap time slot of the power charge is selected. An energy generator may be selected.

When using a commercial power supply as one of the power supplies, of course, for an industrial vehicle that has a charge start time in a time zone where the power rate of the commercial power supply is cheap, select an inexpensive time zone of the power rate and supply power from the commercial power supply By doing this, the electricity bill can be reduced. On the other hand, for industrial vehicles that have a charge start time outside the time zone where the power charges are cheap, it is possible to reduce the power charges inexpensively without using expensive power by selecting the regenerative energy type power generation device as a power supply. it can. Further, since the power rate is usually set high in the time zone where the power demand is high, the power peak cut of the commercial power source can be achieved by suppressing the use of the commercial power in the time zone where the power rate is high.

Alternatively, in this case, the power supply selection unit may use the power supply as the power supply for the industrial vehicle having the charge 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. For the industrial vehicle, which selects a commercial power source and also selects an inexpensive time zone of the power charge as the power feeding time zone and has the charge start time outside the inexpensive time slot of the power charge, The other industrial vehicles may be selected as

As a result, power rates can be reduced by selecting an inexpensive time zone of the power rates and supplying power from a commercial power source. In addition, for industrial vehicles that have a charge start time outside of a time zone where electricity charges are cheap, by selecting another industrial vehicle as a power supply, it is possible to suppress electricity charges inexpensively without using expensive electricity. Can. In addition, it is desirable that other industrial vehicles are supplied with power from a commercial power source of a cheap time zone at the previous and next charging, or from a regenerative energy type power generator.

Furthermore, at this time, the schedule creation unit is configured to store the amount of charge of the industrial vehicle in the secondary battery, the charge efficiency at that time, and the power charge stored in the secondary battery from the charge during the charge. The power supply selection unit further includes a cost calculation unit that calculates a virtual power cost, and the power supply selection unit is configured to calculate the virtual power cost of the industrial vehicle as the plurality of power supplies and a power charge of at least one other power supply. And the inexpensive one of the power rates may be selected as the power supply.

As described above, cost calculation means for calculating the virtual power cost of the power stored in the secondary battery from the charge amount charged in the secondary battery of the industrial vehicle, the charge efficiency at that time, and the power charge at the time of charge And compare the virtual electricity cost of the industrial vehicle that is one of multiple electricity sources with the electricity charges of other electricity sources such as commercial power sources and regenerative energy generators, from the viewpoint of electricity charges By selecting the power supply, the power charge can be made the least expensive. For example, in the case of setting to normally charge from a commercial power source, if the virtual power cost of the industrial vehicle is the lowest, charging and feeding are performed between the industrial vehicles. Therefore, it is possible to suppress the electricity charge at a lower cost than charging from a commercial power source. Of course, the power rates may be compared among the plurality of power supplies other than the industrial vehicle, or the virtual power costs may be compared among the industrial vehicles.

In the charging and feeding management device for an industrial vehicle, when the commercial power source is selected as the power supply by the schedule creating unit, the schedule creating unit generates electric power based on the information of the surrounding environment in which the industrial vehicle operates. When it is determined by the peak cut determining means that determines the necessity of peak cut and the power cut by the peak cut determining means, power is supplied to the industrial vehicle from the commercial power source before the peak time, and the peak time is determined And the peak cut means for supplying power from the industrial vehicle.

As described above, the commercial power source charges the industrial vehicle before the power demand increases, and when the power demand increases, the industrial vehicle feeds the power system connected to other industrial vehicles or the commercial power source. By doing this, the demand for electricity can be leveled.
In addition, when a renewable energy type power generation apparatus is used as one of the power supplies, the schedule creation unit may create a charging / feeding schedule in consideration of output fluctuation of renewable energy. Specifically, the information acquisition unit acquires power generation status information in the regenerative energy type power generation apparatus, and creates a charging and feeding schedule based on information including the power generation status information in addition to the above-described industrial vehicle information. As a result, it is possible to smooth the output fluctuation of the regenerative energy type power generation apparatus and to stably supply power to the grid.

In the charging and feeding management device for an industrial vehicle, the information acquisition unit acquires a health condition of the secondary battery mounted on the industrial vehicle as the battery condition in the industrial vehicle information, and the schedule creation unit The charging and feeding schedule may be created in consideration of the health condition.
Thus, in addition to the scheduled operation time of the industrial vehicle and the charge remaining amount of the secondary battery, the schedule creation unit creates the schedule in consideration of the health status such as the deterioration status of the secondary battery. It can extend the life of the battery.

An energy management system according to the present invention includes a secondary battery mounted thereon, a plurality of industrial vehicles different in operation start time, operation time, operation time zone, etc., a charging / discharging device to which the plurality of industrial vehicles are connected, It is preferable to provide a charging / feeding management device.
As a result, charging and feeding of a plurality of industrial vehicles can be comprehensively managed while effectively utilizing the power stored in the secondary battery of the industrial vehicle without affecting the operation of the industrial vehicle.

A charge / discharge device according to the present invention is a charge / discharge device connected to a plurality of industrial vehicles on which a secondary battery is mounted and controlling charge / discharge of the industrial vehicle, and the industrial vehicle connection to which the industrial vehicle is connected End, a grid connection end to which a power grid is connected, a generator connection end to which a regenerative energy type power generator is connected, an AC-DC converter whose one end is connected to the grid connection end, the AC-DC converter And a DC-DC converter connected between the industrial vehicle connection end and a charging / feeding management device for managing charging / discharging of the industrial vehicle, the charging / charging management device being connected to the industrial vehicle connection end An information acquisition unit for acquiring industrial vehicle information including the identified identification information of the industrial vehicle, the battery state including the current charge remaining amount, and the next scheduled operation time, and a charging schedule set based on the industrial vehicle information And having a discharge control unit for controlling the charge or discharge of the industrial vehicle on the basis of.

According to the charge / discharge device, the power supplied from the power system is input to the AC-DC converter at one end, converted from AC to DC, and then converted to voltage via the DC-DC converter. Power is supplied to the vehicle. On the other hand, two industrial vehicles connected to the industrial vehicle connection end are connected via a DC-DC converter, and the voltage can be converted by the DC-DC converter. is there. With such a configuration of the charge / discharge device, the two-way vehicle between the two industrial vehicles, between the industrial vehicle and the electric power system, or between the industrial vehicle and the regenerative energy type power generation device with a simple configuration. Power can be supplied.

A method of managing charging and feeding of an industrial vehicle according to the present invention is a method of managing charging and feeding of an industrial vehicle for managing charging and feeding of a plurality of industrial vehicles having a secondary battery mounted thereon, the charging and discharging management method of the plurality of industrial vehicles An information acquisition step of acquiring industrial vehicle information including identification information of an industrial vehicle connected to an electric appliance, a battery state including a current charge remaining amount, and a next operation scheduled time, the operation scheduled time and the current charge remaining amount And selecting a charge or discharge or standby of the industrial vehicle based on the current time and a schedule generation step of determining a charge / discharge start time of the industrial vehicle to create a charging / discharging schedule; And charging / discharging control step of controlling charging or discharging of the secondary battery mounted on the industrial vehicle according to a power feeding schedule.

According to the method of controlling charging and feeding of the industrial vehicle, the charging and feeding of a plurality of industrial vehicles is controlled while effectively utilizing the power stored in the secondary battery of the industrial vehicle without affecting the operation of the industrial vehicle. Management.

According to the present invention, the industrial vehicle information of the industrial vehicle connected to the charge / discharge device is acquired by the information acquisition unit, and based on the acquired industrial vehicle information, the schedule preparation unit charges or discharges or waits for the industrial vehicle. And one of them is selected and the charge / discharge start time is determined. As a result, the industrial vehicle that can be fed is determined from the charging time and the remaining amount of charge, power is supplied from the industrial vehicle that can be fed, and the non-powerable industrial vehicle is only charged, which affects the operation of the industrial vehicle. It is possible to effectively utilize the power stored in the secondary battery of the industrial vehicle without giving it. Further, by determining the charge / discharge start time of the industrial vehicle based on the industrial vehicle information, charge / discharge can be performed without affecting the operation of the industrial vehicle. Furthermore, when the industrial vehicle information includes the identification information of the industrial vehicle, charging / discharging of a plurality of industrial vehicles can be comprehensively managed.

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 charging / charging management function. It is a figure explaining 2nd Example of a charging / discharging management function. It is a figure explaining the 3rd Example of a charging / discharging management function. It is a figure explaining the 4th Example of a charging / feeding management function. It is a figure explaining the 5th Example of a charging / feeding management function. It is a figure explaining the 6th Example of a charging / feeding management function. It is a figure explaining the 7th Example of a charging / discharging management function. It is a figure explaining the 8th Example of a charging / feeding management function. It is a figure showing the modification of the energy management system concerning this embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the attached 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 to this unless there is a specific description, and are merely illustrative. Only.

An energy management system according to a first embodiment of the present invention will be described with reference to FIG. Here, FIG. 1 is a whole block diagram of the energy management system based on 1st Embodiment of this invention. In this embodiment, a secondary battery is mounted, and a plurality of industrial vehicles having different operation modes such as operation start time, operation time, operation time zone, etc. are widely used in facilities, facilities, systems, etc. It is applied.

An example of this industrial vehicle is a vehicle operated in a certain operating area such as a wholesale area and a distribution area or a distribution vehicle including a forklift operating in a factory, such as a tare operated in the market is there.
Since the opening time also differs between such wholesale area and the wholesale area, the plurality of tares in the market are operated differently from the operation start time, the operation time, the operation time zone, and the like. In addition, the operation start time, the operation time, or the operation time zone differs depending on the operation time of the factory, the loading / unloading time zone of the transported object, etc. like a forklift in the factory yard.
Furthermore, the same applies to construction machines such as motor graders used at construction sites. In addition, the present invention is also applied to a cargo handling and transporting vehicle operated in a certain area of each site such as a warehouse, a delivery center, a station, a port wharf, and an airport.

As shown in FIG. 1, the energy management system mainly includes a plurality of industrial vehicles (hereinafter referred to as vehicles 10 (10A, 10B)) on which the secondary battery 11 is mounted, and a charger / discharger 20 to which the vehicle 10 is connected. And an EMS (Energy Management System) controller that manages charging and discharging by the charger / discharger 20.
In FIG. 1, a power system 41 connected to a commercial power source 40 as a power supply to the vehicle 10, a solar power generation apparatus 43 which is a regenerative energy type power generation apparatus, and a private power generation apparatus 46 can be charged and discharged. And a vehicle 10 on which the secondary battery 11 is mounted.

The vehicle 10 is equipped with 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, it is also possible to supply power to a load outside the vehicle 10. For example, a lithium ion secondary battery is suitably used as the secondary battery 11.

At the start of charging, the battery controller 12 outputs necessary power amount information as power necessary for charging to the control unit 26 of the charge / discharge device 20 via the signal line 36. The required power amount information is the required power according to the free capacity of the secondary battery 11. At the start of discharge, dischargeable power amount information is output to the control unit 26 of the charge / discharge device 20 via the signal line 36 as the dischargeable power. Furthermore, 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 charge amount as a monitoring result to the control unit 26 via the signal line 36. . Here, the battery state includes, for example, the cost of stored electricity, the state of health of the battery, and the like, in addition to the charge remaining amount.
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 charge remaining amount. Furthermore, the vehicle 10 may be equipped with an hour meter, whereby one operation time or cumulative operation time of the vehicle may be acquired and the operation time information may be stored in the vehicle information storage unit 13. Furthermore, electricity cost (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 bi-directional AC-DC converter 21, a bi-directional DC-DC converter 22, a control unit 26, power meters 23, 24A, 24B, 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 bi-directional DC-DC converter 22 converts the input DC power into a current / voltage suitable for power supply.

The power meter 23 is connected between the power system 41 and the AC-DC converter 21 and measures the value of the power supplied from the power system 41 to the charger / discharger 20 when the vehicle 10 is charged. Preferably, a smart meter 42 is interposed between the power system 41 and the charge / discharge device 20. The smart meter 42 is a power meter having a communication function, and is connected to the later-described EMS controller 50 via a communication line, and may transmit the current power rate and power consumption to the EMS controller 50.
The power meters 24A and 24B measure the values of power transmitted and received between the vehicles 10A and 10B and the bidirectional DC-DC converter 22.
The power meter 25 measures the value of the power supplied from the solar power generation device 43 to the charge / discharge device 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 simultaneously connected via the communication line 36 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 information acquisition unit 28 acquires vehicle information stored in the vehicle information storage unit 13 and the battery controller 12, and controls charging and feeding of the vehicle based on the charging and feeding schedule from the EMS controller 50. Further, the control unit 26 measures the health status of each of the secondary batteries 11 mounted on the vehicles 10A and 10B connected to the charge / discharge device 20, adds the information to the vehicle information, and sends it to the EMS controller 50. May be The vehicles 10A and 10B may be provided with means for measuring the health condition of the secondary battery 11. In this case, the health condition is acquired from the vehicles 10A and 10B together with vehicle information such as the remaining charge, and such information is obtained. It sends to the EMS controller 50.

The EMS controller 50 is a device that mainly manages charging and feeding of the 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 charge / discharge device 20 via the 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 charge / discharge device 20, the operation start time, the remaining charge amount, and the virtual power cost. Furthermore, it is desirable to store the charging / feeding schedule created by the schedule creation unit 53, and to overwrite and store it each time the charging / feeding schedule is updated.

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

Here, the time acquisition unit 54 acquires the current time.
The charge / discharge determination unit 55 selects any of charging, discharging, or standby of the vehicle 10 based on the scheduled operation time and the current remaining charge amount of the vehicle information.
The start time determination means 56 determines the charge / discharge start time of the vehicle 10 based on the scheduled operation time of the vehicle information and the current charge remaining amount.
The quick charge setting means 57 discharges the charge / discharge determination means 55 among the vehicles 10 connected to the charge / discharge device 20 when the 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 the quick charge request from the selected vehicle 10.

The power supply selection unit 58 selects a power supply that supplies electric power from the plurality of power supplies to the vehicle 10 and a power supply time zone from the power supply based on the vehicle information and the power rate 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 rates of the respective power supplies, and the power supply from the power supplies. By selecting the power supply time zone, the power rate can be reduced at a low price, and the smoothing of the power demand can be measured.

In this case, for the vehicle 10 having the charge start time in the time zone where the power rate of the commercial power source 40 is inexpensive, the power source selection means 58 selects the commercial power source as the power source and the power rate as the power supply time zone. An inexpensive time zone may be selected, and the solar power generation apparatus 43 may be selected as a power supply for the vehicle 10 having a charge start time outside the inexpensive time zone of the power rate. Of course, for the vehicle 10 having a charge start time in a time zone where the power rate of the commercial power source 40 is inexpensive, the power rate can be reduced by selecting an inexpensive time zone of the power rate and supplying power from the commercial power source. On the other hand, for the vehicle 10 having the charge start time outside the time zone where the power charge is inexpensive, the power charge can be suppressed inexpensively without using the expensive power by selecting the solar power generation device 43 as a power supply. it can. Further, since the power rate is usually set high in the time zone where the power demand is high, the power peak cut of the commercial power source can be achieved by suppressing the use of the commercial power in the time zone where the power rate is high.

Alternatively, for the vehicle 10 having a charge start time in a time zone where the power rate of the commercial power source 40 is inexpensive, select the commercial power source 40 as a power supply and select an inexpensive time zone of the power rate as a power supply time zone. For a vehicle 10 having a charge start time outside the inexpensive time zone of the power charge, another vehicle 10 may be selected as a power supply. Thus, the power rate can be reduced by selecting an inexpensive time zone of the power rate and supplying power from the commercial power source 40. Further, for the vehicle 10 having a charge start time outside the time zone where the power rate is low, by selecting another vehicle 10 as a power supply, the power rate can be suppressed inexpensively without using expensive power. Can. It should be noted that the other vehicle 10 is supplied with power from the commercial power supply 40 in a cheap time zone at the previous charging, or from the solar power generator 43, and the next charging is from a cheap time zone or power feeding from the solar power generator It is desirable to be done.

The cost calculation means 59 calculates the virtual power cost of the power stored in the secondary battery from the charge amount charged in the secondary battery 11 of the vehicle 10, the charge efficiency at that time, and the power charge at the time of charge.
In the case of having such cost calculation means 59, in the power supply selection means 58, the virtual power cost of the standby vehicle capable of supplying power from among the plurality of power supplies, the commercial power source 40, the regenerative energy type power generation device 43, etc. From the power supply rates of the other power supplies, the cheapest power supply may be selected. At this time, when there are a plurality of standby vehicles, the virtual power costs of the respective standby vehicles are compared with each other, the standby vehicle having the lowest virtual power cost is selected as a power supply, and charging and feeding are performed between the vehicles. As a result, by charging and supplying power between the two vehicles 10A and 10B, it is possible to prevent an increase in the power rate and reliably suppress the power rate at a low price.

When the information acquisition unit 52 acquires the health condition of the secondary battery 11 mounted on the vehicles 10A and 10B as the battery condition in the vehicle information, the schedule creation unit 53 takes the schedule in consideration of the health condition. It is preferable to create. Thereby, the life of the secondary battery 11 can be extended.

Furthermore, in addition to the vehicle information, the information acquisition unit 52 may acquire power generation status information of the regenerative energy type power generation apparatus, and create a charging / feeding schedule based on these pieces of information.
In general, the power generation apparatus may have a large output fluctuation because many of them are affected by the surrounding environment. In particular, in a power generation device using renewable energy such as sunlight or wind power, the output tends to fluctuate in a short time. When supplying electric power from the regenerative energy type power generating apparatus to the power system 41 in the premises, if the power supply fluctuates, the burden on the power stabilization on the power supply side of the commercial power supply 40 will be increased.
Therefore, in the present embodiment, the power generation status information of the solar power generation device 43 which is a regenerative energy type power generation device is acquired, and the power supply from the solar power generation device 43 to the electric power system 41 is leveled based on this information. Create a charging and feeding schedule that 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, if necessary, the vehicles 10A and 10B are charged. Thereby, it is possible to smooth the output fluctuation of the solar power generation device 43 and stably supply the power to the power system 41.

Next, specific examples of the charge management function using the energy management system having the above-described configuration will be described with reference to FIGS. Note that, in FIGS. 2 to 9, since the detailed parts of the respective devices are omitted, the explanation will be made using the name of FIG.
FIG. 2 is a diagram for explaining a first embodiment of the charging / feeding management function. In the first embodiment, the case of delivery between vehicle 10A and 10B of vehicle power, which has a virtual power cost lower than the commercial power rate, is shown.
In FIG. 2, the vehicle 10A and the vehicle 10B have different operation modes such as an operation start time, an operation time, and an operation time zone. For example, the vehicle 10A is a vehicle that can use night power, that is, a vehicle that operates in the daytime, and the vehicle 10B is a vehicle that can not use night power, that is, a vehicle that operates in the night. Further, in the drawing, the vehicle 10B is a charge target, and as the power supply, a case where there is a vehicle 10A other than the vehicle 10B and a commercial power supply 40 is illustrated. The EMS controller 50 may recognize a vehicle connected to the charge / discharge device 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 by itself, the charge amount with which the secondary battery 11 is charged by the cost calculation means 59, the charge efficiency at that time, and the power at the time of charge The virtual power cost is calculated from the charge and stored in the vehicle information storage unit 13. This virtual power cost is preferably updated each time charging. In addition, the virtual power cost may not be stored in the vehicle information storage unit 13, and 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 from among the other vehicle 10B serving as a power supply and the commercial power supply 40 with respect to the vehicle 10A. That is, the virtual power cost of the other vehicle 10B is compared with the power rate of the commercial power source 40, and the one with the lower power rate is selected as the power source. At this time, when there is a regenerated energy type power generation device 43 (see FIG. 1) or a plurality of other vehicles as the power supply, the power rates of 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. The vehicle 10B is charged in the daytime as described above.
The EMS controller 50 searches the vehicle 10B that has detected the charging request for a power supply that can supply power at the lowest cost.
On the other hand, the EMS controller 50 selects discharge from the charge remaining time and the charge start time when the charge remaining at the time of operation termination is, for example, 30% as the charge / discharge schedule of the vehicle 10A where nighttime power can be used. 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 source 40 has a power rate set according to the time zone, and usually, the nighttime power rate is set cheaper than the daytime power rate. In the vehicle 10A, when charging with nighttime 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 10A with the daytime power rate of the commercial power source 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 a power supply. Then, the remaining charge amount is supplied to another vehicle 10B via the charge / discharge device 20. At this time, the vehicle 10B is a vehicle that can not use the nighttime power, and therefore the power stored in the vehicle 10B becomes inexpensive power by supplying power from the vehicle 10A charged with the nighttime power, which reduces the power cost Can be The vehicle 10B may supply power from a plurality of vehicles. For example, when the remaining charge of the vehicle 10B is 10%, the remaining charge becomes 40% by supplying power from the first vehicle 10A, and the second vehicle The remaining charge can be further increased by supplying power from the vehicle 10A '.

FIG. 3 is a diagram for explaining a second embodiment of the charging / feeding management function. In the second embodiment, the case where the vehicle 10A is rapidly charged to the vehicle 10B is shown.
In FIG. 3, in a state where a vehicle 10A having a surplus in the remaining amount of charge is connected to the charger / discharger power network that is DC-connected to the same charger / discharger 20, when there is a rapid charge request from the vehicle 10B, That is, when the vehicle 10B is connected to the rapid charging vehicle connection end, part or all of the charging to the vehicle 10B is performed by the rapid charging from the vehicle 10A. As a result, even if charging from power system 41 is difficult due to limitations in cost and facilities on the grid side, only the facilities on vehicles 10A and 10B need only be compatible with rapid charging, and costs can be reduced. . It can also be easily added to existing equipment.

When the quick charge command switch is provided on the vehicle 10B side, the position information of the charge / discharge device 20 may be notified to the vehicle 10B by switch operation. Specifically, the vehicle 10B includes the wireless communication terminal 110 and the on-vehicle display 111, and the charger / discharger 20 includes the wireless communication terminal 120. When the rapid 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 10B receives the position information via the wireless communication terminal 110 and causes the on-vehicle display 111 to display the position information. Thereby, when rapid charging is required, it is possible to reliably find out the rapidly chargeable charger / discharger 20, and it is possible to perform charging quickly.

FIG. 4 is a diagram for explaining a third embodiment of the charging / feeding management function. In the third embodiment, the vehicle 10B which can not use the nighttime power is charged using the charger / discharger 20 connected to the solar power generation apparatus 43 by a DC bus.
In FIG. 4, a vehicle 10 </ b> B is a vehicle that can not use electric power at night. In this case, although charging in the daytime has to be performed, charging in the daytime from the commercial power source 40 is expensive, and there is a possibility that the power demand peak may be further increased. Therefore, power is preferentially supplied from the solar power generation device 43 to the vehicle 10B which can not use the nighttime power. As a result, the power cost can be reduced and the power demand can be leveled. Further, 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 for explaining a fourth embodiment of the charging / feeding management function. In the fourth embodiment, the case where the remaining power after operation of the vehicle 10A that can use the nighttime power is returned to the power system 41 in the daytime is shown.
In FIG. 5, the vehicle 10A capable of utilizing 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 charge / discharge device 20. On the other hand, regarding the vehicle 10B which can not use the nighttime power, even if the power remains in the secondary battery 11 after the operation, the vehicle 10B is not returned to the power system 41. Thereby, the daytime power consumption in the whole installation can be suppressed.

FIG. 6 is a diagram for explaining a fifth embodiment of the charging / feeding management function. In the fifth embodiment, the EMS controller 50 estimates whether the power demand exceeds the contract power of the commercial power source 40 based on the environment information of the surroundings of the vehicle 10, and determines that the contract power is exceeded. Make peak cut settings. In the peak cut setting, power is supplied to the non-operating vehicle 10A from the power grid 41 before the peak of the power demand, and power is supplied to the power grid 41 from the power charged to the secondary battery 11 at the peak. Thereby, the vehicle 10A can be used as a storage battery of the electric power system 41, and peak cut of the power demand can be achieved.

FIG. 7 is a diagram for explaining a sixth embodiment of the charging / feeding management function. In this sixth embodiment, a vehicle which switches or charges the power supply in consideration of the operating time or desired charging completion time for each of the vehicles 10A to 10X, the current charge remaining amount, and the photovoltaic power generation state in addition thereto. It is designed to switch between That is, based on the operation time of each vehicle 10, the charge start time and end time of the vehicle are set. For example, the charging time of the vehicle 10A is 12 o'clock to 13 o'clock, the charging time of the vehicle 10B is 13 o'clock to 13:30, and the charging time of the vehicle 10X is 22 o'clock to 1 o'clock. At this time, the connection state of the vehicles 10A to 10X to the charge / discharge device 20 may be maintained, and only the charge control is switched. On the other hand, the power supply from the commercial power source 40 is set to the nighttime power from 22:00 to 7 o'clock, and the power supply from the solar power generation device 43 is set to a time zone in which the power generation efficiency is high from 12 to 16 o'clock. This makes it possible to create an optimal vehicle charging schedule without affecting the operation of the vehicle and at a low power rate.

FIG. 8 is a diagram for explaining a seventh embodiment of the charging / feeding management function. In this seventh embodiment, all the vehicles 10A to 10X are connected to the charger / discharger 20 in an emergency where power from the system is cut off, and all charging power stored in all the vehicles 10A to 10X is stored in the power system 41. Supply to the As a result, power can be supplied to power using devices such as a refrigerator / freezer and an elevator where power supply is prioritized in the facility.

FIG. 9 is a view for explaining an eighth embodiment of the charging / feeding management function. In the eighth embodiment, a plurality of charge / discharge devices 20A to 20C are provided, and vehicles 10A to 10X can be connected to each charge / discharge device. Further, a power system 41 in the facility is connected to the charge / discharge devices 20A to 20C, and AC power is supplied from the power system 41 to the freezer 101 and the lighting.

Here, although the capacity of the secondary battery 11 of the vehicle 10 can be selected in a stepwise manner to some extent, the operation time and the operation load are variously different, and all the vehicles use the battery capacity fully. Does not mean that Therefore, the operation result data of each of the vehicles 10A to 10C is acquired by the hour meter, and the minimum value of the charge termination charge remaining amount is set for each vehicle. If charging can not be performed efficiently due to transient disturbances such as fluctuations in photovoltaic power generation due to sunshine conditions, feeding response at the time of power peaking, rapid charging of priority vehicles, etc. It is possible to reduce the power cost due to charging within a range that does not affect the use of the vehicle, and does not charge to the charge, but to charge to the minimum value of the charge termination charge remaining value.
The plurality of charge / discharge devices 20A to 20C may be connected to each other by the DC line 48. Thereby, for example, when it is desired to rapidly charge the vehicle 10A connected to the charge / discharge device 20A, even if the rapidly chargeable standby vehicle is not connected to the charge / discharge device 20A, another DC line 48 is used. Power can also be supplied from a standby vehicle connected to the charge / discharge devices 20B and 20C. Moreover, when installing the solar power generation device 47, you may connect to DC line 4, and, thereby, it can electrically feed from a solar power generation device 47 to a vehicle, without passing through an inverter etc.

As described above, in the present embodiment, the vehicle information of the vehicle 10 connected to the charger / discharger 20 is acquired by the information acquisition unit 52, and the schedule creation unit 53 is configured to acquire the vehicle 10 based on the acquired vehicle information. And either charging or discharging or standby is selected and the charge / discharge start time is determined. Thus, the vehicle 10 capable of supplying power is determined from the charging time (the required time for charging and the charge / discharge start time) and the remaining amount of charging, and power can be supplied from the vehicle 10 capable of supplying power. Thus, the power stored in the secondary battery of the vehicle 10 can be effectively used without affecting the operation of the vehicle 10.
Further, by determining the charge / discharge start time of the vehicle 10 based on such vehicle information, charge / discharge can be performed without affecting the operation of the vehicle 10.
Furthermore, when the vehicle information includes the identification information of the vehicle 10, charging / discharging of the plurality of vehicles 10 can be comprehensively managed.

Although the embodiments of the present invention have been described in detail, it is needless to say that the present invention is not limited thereto, and various improvements and modifications may be made without departing from the scope of the present invention.

For example, in the embodiment, the industrial vehicle and the cargo handling vehicle have been described, but the present invention is not limited to the industrial vehicle and the cargo handling vehicle, and other mobile bodies (cars, trucks, buses, etc.) It goes without saying that this also includes the case where a plurality of mobile units with different operation modes such as operation start time, operation time, operation time zone, etc. are operated in a certain operation area.

Further, for example, in the energy management system shown in FIG. 1, the solar power generation apparatus 43 is illustrated as a power supply, but other renewable energy type power generation apparatuses such as a wind power generation apparatus, a tidal power generation apparatus, and a geothermal power generation apparatus are used. Good. In this case, one or more regenerative energy type power generation devices can be used.
Although the energy management system shown in FIG. 1 shows an example in which the in-house power generation device 46 is linked to the electric power system connected to the commercial power supply 40, the in-house power generation device 46 may not be provided.

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, it is good also as a structure provided on the charger / discharger 20 side, as shown in FIG. Here, FIG. 10 is a view showing a modified example of the energy management system according to the present embodiment. In this case, the control unit 26 ′ of the charge / discharge device 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 creating unit 83 includes a time acquisition unit 91, a charge / discharge determination unit 92, a start time determination unit 93, a rapid charge setting unit 94, a power supply selection unit 95, a cost calculation unit 59, and a peak cut. And means 100. In addition, since each of these site | parts have the same function as 1st Embodiment, detailed description is abbreviate | omitted. Thus, the charging / feeding management function according to the present embodiment may be installed at any position, and may be installed at different positions as divided units.

10, 10A, 10B Vehicles (Industrial Vehicles)
11 secondary battery 12 battery controller 13 vehicle information storage section 15 normal charging end 16 plug connector for normal charge 17 plug connector for quick charge 20 charger / discharger 21 bidirectional AC-DC converter 22 bidirectional DC-DC converter 26 Control unit 27 charge / discharge control unit 28 information acquisition unit 31 vehicle connection end for normal charge 32 vehicle connection end for quick charge 33 power system connection end 34 solar power generation connection end 46 private power generation apparatus 50 EMS controller 51 storage unit 52 information acquisition unit 53 schedule creation unit 54 time acquisition means 55 charge / discharge determination means 56 start time determination means 57 rapid charge setting means 58 cost calculation means 59 peak cut means

Claims (11)

An industrial vehicle charging and feeding management device that manages charging and feeding of a plurality of industrial vehicles equipped with a secondary battery,
An information acquisition unit for acquiring industrial vehicle information including identification information of the industrial vehicle connected to the charge / discharge device among the plurality of industrial vehicles, a battery state including a current charge remaining amount, and a next operation scheduled time;
A schedule creation unit that creates a charging / feeding schedule of the industrial vehicle based on the industrial vehicle information input from the information acquisition unit;
And a charge / discharge control unit that controls charging or discharging of the secondary battery mounted on the industrial vehicle according to the charging / feeding schedule.
The schedule creation unit selects either charging or discharging or standby of the industrial vehicle based on time acquisition means for acquiring current time, the current time, the scheduled operation time, and the current battery state. A charge and supply management device for an industrial vehicle, comprising: charge and discharge determination means; and start time determination means for determining charge and discharge start time of the industrial vehicle. The said schedule preparation part is another industry connected to the said charging / discharging device, when the rapid charge request | requirement is acquired from the said industrial vehicle by the said information acquisition part, or when rapid charge is selected by the said charging / discharging determination means. The vehicle according to claim 1, further comprising: a rapid charge setting means for supplying power to the industrial vehicle that has output the rapid charge request from the industrial vehicle whose discharge can be selected by the charge / discharge determination means among the vehicles. Power supply management device for industrial vehicles. A plurality of power supplies for supplying power to the industrial vehicle are connected to the charger / discharger,
The schedule creation unit is configured to supply power from the plurality of power supplies to the industrial vehicle based on the industrial vehicle information and the power rates of the power supplies, and a power supply time zone from the power supplies. The system according to claim 1, further comprising a power supply selection means for selecting a power supply. The power supply selecting means selects the commercial power as the power supply for the industrial vehicle having the charge start time in a time zone where the power charge of the commercial power which is one of the power supplies is inexpensive In addition, for the industrial vehicle having the charge start time outside the inexpensive time zone of the power rate, a renewable energy type power generation is selected as the power source, while selecting an inexpensive time zone of the power rate as the power feeding time zone. The apparatus according to claim 3, wherein the apparatus is selected. The power supply selecting means selects the commercial power as the power supply for the industrial vehicle having the charge start time in a time zone where the power charge of the commercial power which is one of the power supplies is inexpensive In addition, for the industrial vehicle where the charge start time is outside the inexpensive time zone of the power rate, the inexpensive time zone of the power rate is selected as the power feeding time zone, and the other power industry as the power supply The charging and feeding management device for an industrial vehicle according to claim 3, wherein a vehicle is selected. The schedule creation unit is configured to calculate a virtual power cost of the power stored in the secondary battery from the charge amount of the industrial vehicle charged in the secondary battery, the charge efficiency at that time, and the power charge at the time of charge. It further comprises cost calculation means for calculating
The power supply selecting means compares the virtual power cost of the industrial vehicle as the plurality of power supplies with the power charge of at least one other power supply to obtain an inexpensive power charge. The charging and feeding management device for an industrial vehicle according to claim 3, which is selected as a power source. In the case where a commercial power source is selected as the power source by the schedule creation unit,
The schedule creation unit determines that the power peak cut is necessary by the peak cut determination unit that determines the necessity of the power peak cut based on the information of the surrounding environment in which the industrial vehicle operates, and the peak cut determination unit 2. The industrial vehicle according to claim 1, further comprising: peak cut means for charging the industrial vehicle from the commercial power source before the peak time and supplying power from the industrial vehicle at the peak time. Power supply management device. The information acquisition unit acquires a health state of the secondary battery mounted on the industrial vehicle as the battery state in the industrial vehicle information.
The apparatus according to claim 1, wherein the schedule creation unit creates the charging / discharging schedule in consideration of the health condition. Several industrial vehicles equipped with a secondary battery,
A charging / discharging device to which the plurality of industrial vehicles are connected;
An energy management system comprising: the charging / discharging management device according to any one of claims 1 to 8. A charge / discharge device connected to a plurality of industrial vehicles equipped with a secondary battery and controlling charge / discharge of the industrial vehicle,
An industrial vehicle connection end to which the industrial vehicle is connected;
A grid connection end to which a power grid is connected;
A generator connection terminal to which a regenerative energy generator is connected;
An AC-DC converter whose one end is connected to the grid connection end;
A DC-DC converter connected between the AC-DC converter and the industrial vehicle connection end;
A charging / feeding management device for managing charging / discharging of the industrial vehicle;
The charge and supply management device includes an information acquisition unit for acquiring industrial vehicle information including identification information of the industrial vehicle connected to the industrial vehicle connection end, a battery state including a current charge remaining amount, and a next operation scheduled time; ,
And a charge / discharge control unit configured to control charge or discharge of the industrial vehicle based on a charge / discharge schedule set based on the industrial vehicle information. A method of managing charging and feeding of an industrial vehicle for managing charging and feeding of a plurality of industrial vehicles equipped with a secondary battery, comprising:
An information acquisition step of acquiring industrial vehicle information including identification information of an industrial vehicle connected to a charge / discharge device among the plurality of industrial vehicles, a battery state including a current charge remaining amount, and a next operation scheduled time;
The charging / discharging schedule of the industrial vehicle is determined based on the scheduled operation time, the current battery state and the current time, and the charging / discharging start time of the industrial vehicle is determined to determine the charging / discharging schedule. Schedule creation step to create
A charging / discharging control step of controlling charging or discharging of the secondary battery mounted on the industrial vehicle according to the charging / discharging schedule.

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