JP2021016243A - Charging and discharging system - Google Patents

Abstract

To provide a charging and discharging system in which an industrial vehicle having a secondary battery can be introduced, and a charging device for quickly charging industrial vehicles can be introduced.SOLUTION: A charging and discharging system 10 includes an industrial vehicle charging device 21 that charges a secondary battery 101 included in a battery forklift 100, a facility power distribution system 30 that supplies power from a system power source 90 to the industrial vehicle charging device 21, an electric-automobile charging and discharging device 41 that charges and discharges a secondary battery 201 included in an electric automobile 200, and a control unit 50 that controls the industrial vehicle charging device 21 and the electric-automobile charging and discharging device 41. The control unit 50 controls the electric-automobile charging and discharging device 41 to discharge the secondary battery 201 of the electric mobile 200 on the basis of the amount of power being supplied from the system power source 90 to the facility power distribution system 30 and/or the amount of power being supplied from the facility power distribution system 30 to the industrial vehicle charging device 21.SELECTED DRAWING: Figure 1

Description

The present invention relates to a charge / discharge system.

The logistics network system disclosed in Patent Document 1 includes a charger / discharger as a charging device for an industrial vehicle for charging a secondary battery of an industrial vehicle such as a forklift or an automatic guided vehicle in a distribution center. The charger / discharger charges the secondary battery by converting the AC power supplied from the power network into DC power and supplying it to the secondary battery. The charger / discharger also converts the DC power of the secondary battery into AC power and discharges it to the power network.

JP-A-2017-158363

By the way, in recent years, the capacity of secondary batteries for industrial vehicles has been increasing. Along with this, the time to supply power from the grid power supply to the industrial vehicle charging device becomes longer, and the amount of power supplied from the grid power supply per hour increases by introducing the industrial vehicle charging device for quick charging. To do. Therefore, there is a risk of being caught in the limit value of the electric energy of the existing facility distribution system, and eventually it may be necessary to reinforce the facility distribution system.

The present invention has been made by paying attention to the problems existing in such a conventional technique, and an object of the present invention is to introduce an industrial vehicle having a secondary battery without changing an existing facility power distribution system. The purpose is to provide a charging / discharging system capable of introducing a charging device for an industrial vehicle for quick charging.

The charging / discharging system that solves the above problems includes a charging device for an industrial vehicle that charges a secondary battery of an industrial vehicle, a facility distribution system that supplies power from a system power source to the charging device for the industrial vehicle, and an electric vehicle. A charging / discharging system including a charging / discharging device for an electric vehicle for charging / discharging a secondary battery, a charging device for an industrial vehicle, and a control unit for controlling the charging / discharging device for the electric vehicle. Discharge the secondary battery of the electric vehicle based on at least one of the amount of power supplied from the system power source to the facility distribution system and the amount of power supplied from the facility distribution system to the industrial vehicle charging device. The charging / discharging device for the electric vehicle is controlled as described above.

According to this, the electric power charged in the secondary battery of the electric vehicle can be supplied to the charging device for industrial vehicles. Therefore, we provide a charge / discharge system that can introduce an industrial vehicle with a secondary battery or a charging device for an industrial vehicle for quick charging without making changes such as strengthening the facility distribution system. It becomes possible to do.

In the above charging / discharging system, the control unit includes an industrial vehicle charging controller that controls the industrial vehicle charging device and an electric vehicle charging / discharging controller that controls the electric vehicle charging / discharging device. The charging controller for an industrial vehicle is based on at least one of the amount of power supplied from the system power source to the facility distribution system and the amount of power supplied from the facility distribution system to the charging device for the industrial vehicle. A request is output to the charge / discharge controller for the electric vehicle to discharge the secondary battery, and the charge / discharge controller for the electric vehicle receives the request and receives the request based on the information regarding the operation schedule of the electric vehicle. It is preferable to control the charging / discharging device for the electric vehicle so as to determine whether or not the secondary battery of the electric vehicle can be discharged, and if it is determined that the secondary battery of the electric vehicle can be discharged, the secondary battery of the electric vehicle is discharged.

According to this, the charge / discharge controller for the electric vehicle determines whether or not the secondary battery of the electric vehicle can be discharged based on the information regarding the operation schedule of the electric vehicle. Therefore, when it is time to use the electric vehicle by discharging the electric power charged in the secondary battery of the electric vehicle, it is possible to prevent the use from being hindered.

In the above charge / discharge system, when the control unit controls the charge / discharge device for the electric vehicle so as to discharge the secondary battery of the electric vehicle at night, the control unit is constantly parked at night. It is preferable to preferentially control the charging / discharging device for the electric vehicle to which the electric vehicle is connected.

According to this, for example, the electric power charged in the secondary battery of the company-owned vehicle, which is an electric vehicle that is constantly parked at night, can be supplied to the charging device for industrial vehicles. Therefore, the secondary battery of the industrial vehicle can be charged without imposing an excessive load on the facility distribution system.

In the above charge / discharge system, when the control unit controls the charge / discharge device for the electric vehicle so as to discharge the secondary battery of the electric vehicle in the daytime, the control unit is constantly parked in the daytime. It is preferable to preferentially control the charging / discharging device for the electric vehicle to which the electric vehicle is connected.

According to this, for example, the electric power charged in the secondary battery of the employee vehicle owned by the employee, which is an electric vehicle that is constantly parked in the daytime, can be supplied to the charging device for industrial vehicles. .. Therefore, the secondary battery of the industrial vehicle can be charged without excessively imposing a load on the facility distribution system.

According to the present invention, an industrial vehicle having a secondary battery can be introduced, or an industrial vehicle charging device for quick charging can be introduced.

The schematic which showed the 1st Embodiment of a charge / discharge system. The schematic which showed the 2nd Embodiment of the charge / discharge system. The schematic which showed the 3rd Embodiment of the charge / discharge system.

<First Embodiment>
Hereinafter, the first embodiment in which the charge / discharge system is embodied will be described with reference to FIG.
As shown in FIG. 1, the charging / discharging system 10 includes a charging system 20 for an industrial vehicle, a facility distribution system 30, a charging / discharging system 40 for an electric vehicle, and a control unit 50.

The charging system 20 for an industrial vehicle is provided, for example, on the premises of a factory. The industrial vehicle charging system 20 includes a plurality of industrial vehicle charging devices 21 for charging the secondary battery 101 of the battery forklift 100 as an industrial vehicle. The plurality of charging devices 21 for industrial vehicles are arranged, for example, at charging stations on the premises of a factory. As the secondary battery 101, for example, a lithium ion battery or a lead storage battery is adopted.

The charging / discharging system 40 for an electric vehicle is provided, for example, in a company-owned car parking lot or an employee car parking lot outside the factory premises. The electric vehicle charging / discharging system 40 includes a plurality of electric vehicle charging / discharging devices 41 that charge / discharge the secondary battery 201 of the electric vehicle 200. The charging / discharging device 41 for an electric vehicle of the present embodiment has a bidirectional power conversion device 42. The electric vehicle 200 includes, for example, EV (Electric Vehicle), PHV (Plug in Hybrid Vehicle), PHEV (Plug in Hybrid Electric Vehicle), and the like.

The facility distribution system 30 is provided, for example, on the premises of a factory. The facility distribution system 30 is provided to supply the electric power supplied from the system power supply 90 to the factory load 91, the charging device 21 for industrial vehicles, and the charging / discharging device 41 for electric vehicles. The facility distribution system 30 includes a factory distribution board 31, a lift charging distribution board 34, and an electric vehicle distribution board 36. The factory distribution board 31 has an upper breaker 32 connected to the system power supply 90, and a plurality of first lower breakers 33 electrically connected to the upper breaker 32. Each of the plurality of first lower breakers 33 is connected in series with the upper breaker 32. One of the plurality of first lower breakers 33 is electrically connected to the lift charging distribution board 34 and the electric vehicle distribution board 36. Except for the first lower breaker 33 electrically connected to the lift charging distribution board 34 and the electric vehicle distribution board 36, the other first lower breakers 33 are electrically connected to different factory loads 91. ing. The facility distribution system 30 generally has an existing configuration in a factory. The lift charging distribution board 34 has a plurality of second lower breakers 35. Each of the plurality of second lower breakers 35 is electrically connected in series with one of the plurality of first lower breakers 33 of the factory distribution board 31. Further, the plurality of second lower breakers 35 are connected in series to different charging devices 21 for industrial vehicles. The distribution board 36 for an electric vehicle has a plurality of third lower breakers 37. Each of the plurality of third lower breakers 37 is electrically connected in series with one of the plurality of first lower breakers 33 of the factory distribution board 31. Further, the plurality of third lower breakers 37 are connected in series to different charging / discharging devices 41 for electric vehicles.

In this way, the facility distribution system 30 supplies the system power supplied from the system power supply 90 to the plurality of first lower breakers 33 via the upper breakers 32 of the factory distribution board 31. The system power supplied to the plurality of first lower breakers 33 is supplied to the factory load 91 and also to the lift charging distribution board 34 and the electric vehicle distribution board 36. The system power supplied to the lift charging distribution board 34 is supplied to the plurality of industrial vehicle charging devices 21 via the plurality of second lower breakers 35. When the battery forklift 100 is connected to the industrial vehicle charging device 21, the secondary battery 101 of the battery forklift 100 is charged via the industrial vehicle charging device 21.

Further, the system power supplied to the electric vehicle distribution board 36 is supplied to the plurality of electric vehicle charge / discharge devices 41 via the plurality of third lower breakers 37. If the electric vehicle 200 is connected to the electric vehicle charging / discharging device 41, the system power supply 90 supplies the electric vehicle charging / discharging device 41 to the electric vehicle charging / discharging device 41 via the factory distribution board 31 and the electric vehicle distribution board 36. The generated electric power is converted into DC electric power by the bidirectional power conversion device 42, and the secondary battery 201 of the electric vehicle 200 is charged. Further, the charging / discharging device 41 for an electric vehicle converts the power charged in the secondary battery 201 of the electric vehicle 200 into AC power by the bidirectional power conversion device 42, and the distribution board 36 for the electric vehicle and the lift. It has a function of supplying electric power to the charging device 21 for industrial vehicles via the charging distribution board 34. That is, the charging / discharging system 40 for an electric vehicle has a function of charging / discharging the secondary battery 201 of the electric vehicle 200.

The control unit 50 controls the charging device 21 for industrial vehicles and the charging / discharging device 41 for electric vehicles. The control unit 50 includes an industrial vehicle charging controller 51 that controls the industrial vehicle charging device 21, and an electric vehicle charging / discharging controller 52 that controls the electric vehicle charging / discharging device 41.

The industrial vehicle charge controller 51 can communicate with the industrial vehicle charge device 21 by the communication line L1.
The electric vehicle charge / discharge controller 52 can communicate with the electric vehicle charge / discharge device 41 via the communication line L2.

The charge controller 51 for industrial vehicles and the charge / discharge controller 52 for electric vehicles can communicate with each other via the communication line L3.
When it is transmitted via the communication line L1 that the industrial vehicle charging controller 51 is connected to the battery forklift 100 from the industrial vehicle charging device 21, the battery forklift 100 is transmitted from the industrial vehicle charging device 21 through the communication line L1. Issue a command to the industrial vehicle charging device 21 to supply power to the vehicle. Upon receiving a command from the industrial vehicle charging controller 51, the industrial vehicle charging device 21 transfers the electric power supplied from the system power supply 90 to the lift charging distribution board 34 via the factory distribution board 31 of the battery forklift 100. It is supplied to the secondary battery 101.

When the charging / discharging controller 52 for the electric vehicle is informed via the communication line L2 that the charging / discharging device 41 for the electric vehicle is connected to the electric vehicle 200, the charging / discharging device 41 for the electric vehicle transmits the charging / discharging controller 52. A command is issued to the charging / discharging device 41 for the electric vehicle to supply power to the electric vehicle 200. When the electric vehicle charge / discharge device 41 receives a command from the electric vehicle charge / discharge controller 52 to supply power to the electric vehicle 200, the electric vehicle charge / discharge device 41 is transferred from the system power source 90 to the electric vehicle distribution board 36 via the factory distribution board 31. The supplied electric power is supplied to the electric vehicle 200.

The charging controller 51 for an industrial vehicle is based on at least one of the electric energy supplied from the system power source 90 to the facility distribution system 30 and the electric energy supplied from the facility distribution system 30 to the industrial vehicle charging device 21. A request is output to the electric vehicle charge / discharge controller 52 via the communication line L3 so as to discharge the electric energy charged in the secondary battery 201.

The charging controller 51 for an industrial vehicle of the present embodiment monitors the amount of electric power supplied from the system power supply 90 to the factory distribution board 31, and the system power supply 90 is set to the set value of the electric energy set in the upper breaker 32. When the amount of electric energy supplied to the upper breaker 32 is reached, the above request is output to the electric vehicle charge / discharge controller 52.

The set value is, for example, a value set with respect to the amount of power that can be supplied by the system power supply 90, and is set lower than the upper limit of the contracted power, which is the amount of power that can be used by the entire factory. That is, the set value is set from the viewpoint of not stopping the factory load 91 and the like, and the viewpoint of not stopping the function of the entire factory.

The charging / discharging controller 52 for an electric vehicle is based on information on the operation schedule of the electric vehicle 200 and information on the remaining capacity of the secondary battery 201 of the electric vehicle 200 by inputting a request output from the charging controller 51 for an industrial vehicle. It is determined whether or not the electric power charged in the secondary battery 201 of the electric vehicle 200 can be supplied to the charging device 21 for industrial vehicles. Specifically, the information regarding the operation schedule is information regarding the use of the electric vehicle 200, and includes at least the time for using the electric vehicle 200.

In the present embodiment, the information regarding the operation schedule is stored in the charge / discharge controller 52 for the electric vehicle.
Further, in the present embodiment, in addition to the information on the time when the electric vehicle 200 is used and the information on the remaining capacity of the secondary battery 201, which are the information on the operation schedule, the information on the charging is also used to use the secondary battery of the electric vehicle 200. It is determined whether or not the electric power charged in 201 can be supplied to the industrial vehicle charging device 21.

The information on charging includes the time required to charge each electric vehicle 200 from the remaining capacity of the secondary battery 201, which is determined to be undischargeable, to the capacity required for use for the planned usage period. If the charging / discharging device 41 for an electric vehicle has a function capable of inputting a desired charging start time or charging completion time, it is the input charging start time or charging completion time.

When it is time to use the electric vehicle 200 by discharging the electric power charged in the secondary battery 201, the charge / discharge controller 52 for the electric vehicle determines whether or not the use is hindered and can discharge the electric vehicle. When it is determined, the electric vehicle is charged and discharged so that the electric power charged in the secondary battery 201 is supplied to the industrial vehicle charging device 21 via the electric vehicle distribution board 36 and the lift charging distribution board 34. It controls the device 41. The charge / discharge controller 52 for an electric vehicle may calculate the dischargeable time and control the discharge so as to discharge only for the calculated time, and if the calculated time is short, it is determined that the discharge is impossible. You may. Further, the electric vehicle charge / discharge controller 52 recharges the secondary battery 201 when it is time to use the electric vehicle 200 after discharging so as not to interfere with the use.

In this way, the control unit 50 is a charging / discharging device for an electric vehicle so as to discharge the power charged in the secondary battery 201 of the electric vehicle 200 based on the amount of electric power supplied from the system power supply 90 to the facility distribution system 30. It has a function of controlling 41.

When the control unit 50 controls the charging / discharging device 41 for an electric vehicle so as to discharge the electric power charged in the secondary battery 201 of the electric vehicle 200 at night, the electric vehicle is constantly parked at night. The charging / discharging device 41 for an electric vehicle to which the 200 is connected is preferentially controlled. Here, the electric vehicle 200 that is constantly parked at night is, for example, a company-owned vehicle. Company-owned vehicles generally operate infrequently at night and are regularly parked at night.

Further, when the control unit 50 controls the charging / discharging device 41 for an electric vehicle so as to discharge the electric power charged in the secondary battery 201 of the electric vehicle 200 in the daytime, the control unit 50 is constantly parked in the daytime. The charging / discharging device 41 for an electric vehicle to which the electric vehicle 200 is connected is preferentially controlled. Here, the electric vehicle 200 that is constantly parked in the daytime is, for example, an employee vehicle owned by an employee of a factory. Employee vehicles generally operate infrequently during the day when employees work in factories and are parked regularly during the day. As described above, in this embodiment, the control is carried out by paying attention to the usage mode that changes depending on the ownership mode of the electric vehicle 200. As a method of determining the usage mode of the electric vehicle 200, for example, a method of providing a dedicated charging / discharging device 41 for the electric vehicle can be considered for each usage mode.

The operation and effect of this embodiment will be described.
(1-1) In the present embodiment, the electric power charged in the secondary battery 201 of the electric vehicle 200 can be supplied to the charging device 21 for an industrial vehicle. Therefore, for example, the battery forklift 100 as an industrial vehicle having a secondary battery 101 or the charging device 21 for an industrial vehicle for quick charging is introduced without making changes such as strengthening the facility distribution system 30. It is possible to provide a charging / discharging system 10 capable of performing the charging / discharging system.

(1-2) In the present embodiment, the charge / discharge controller 52 for an electric vehicle determines whether or not the secondary battery 201 of the electric vehicle 200 can be discharged based on the information regarding the operation schedule of the electric vehicle 200. Therefore, when it is time to use the electric vehicle 200 by discharging the electric power charged in the secondary battery 201, it is possible to prevent the use from being hindered.

(1-3) In the present embodiment, for example, the electric power charged in the secondary battery 201 of the company-owned vehicle, which is an electric vehicle 200 that is constantly parked at night, is supplied to the industrial vehicle charging device 21. be able to. Therefore, the secondary battery 101 of the battery forklift 100 can be charged without imposing an excessive load on the facility distribution system 30.

(1-4) In the present embodiment, for example, the electric power charged in the secondary battery 201 of the employee vehicle owned by the employee, which is the electric vehicle 200 that is constantly parked in the daytime, is charged for the industrial vehicle. It can be supplied to the device 21. Therefore, the secondary battery 101 of the battery forklift 100 can be charged without excessively applying a load to the facility distribution system 30.

(1-5) In the present embodiment, the amount of electric power supplied from the system power supply 90 to the facility distribution system 30 is temporarily increased by temporarily increasing the amount of electric power supplied to the industrial vehicle charging device 21. Can be suppressed. Therefore, even if the number of charging devices 21 for industrial vehicles is increased, or the battery forklift 100 equipped with the large-capacity secondary battery 201 or the quick charger is introduced, it is not necessary to make changes such as strengthening the facility distribution system 30. ..

<Second embodiment>
Hereinafter, a second embodiment of the charge / discharge system will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 2, the control unit 50 further includes a management server 53. The management server 53 can communicate with the charge controller 51 for industrial vehicles and the charge / discharge controller 52 for electric vehicles by the communication line L4. The management server 53 has a function of relaying mutual communication between the charge controller 51 for industrial vehicles and the charge / discharge controller 52 for electric vehicles. When the request in the first embodiment is output from the industrial vehicle charge controller 51 to the electric vehicle charge / discharge controller 52, the request is output to the electric vehicle charge / discharge controller 52 through the management server 53 via the communication line L4. In the present embodiment, the charge / discharge controller 52 for the electric vehicle stores the information on the operation schedule of the electric vehicle 200 as in the first embodiment. For example, the information on the operation schedule is stored in the management server 53. It may have been done.

In this embodiment, the following effects can be obtained in addition to the effects of the first embodiment.
(2-1) Since the processing performed by the industrial vehicle charge controller 51 and the electric vehicle charge / discharge controller 52 is reduced by providing the management server 53, the industrial vehicle charge controller 51 and the electric vehicle charge / discharge controller 52 are inexpensive. Can be a thing.

Each of the above embodiments can be modified as follows. Each of the above embodiments and the following modified examples can be implemented in combination with each other within a technically consistent range.
〇 The electric vehicle 200, which is regularly parked in the daytime, is used as an employee vehicle, but it is not limited to this. For example, the electric vehicle 200 that is regularly parked in the daytime may include a company-owned vehicle that is constantly parked in the daytime depending on the working hours of the customer. That is, the electric vehicle 200 that is constantly parked in the daytime may be owned by a company-owned vehicle.

〇 The electric vehicle 200, which is regularly parked at night, is a company-owned vehicle, but it is not limited to this. For example, the electric vehicle 200 that is regularly parked at night may include an employee vehicle owned by an employee who works night shifts at the factory. That is, the electric vehicle 200 that is constantly parked at night may be owned by an employee vehicle.

〇 When the control unit 50 controls the charging / discharging device 41 for an electric vehicle so as to discharge the secondary battery 201 of the electric vehicle 200 in the daytime, the electric vehicle 200 that is constantly parked in the daytime is connected. The charging / discharging device 41 for an electric vehicle is preferentially controlled. Further, when the control unit 50 controls the charging / discharging device 41 for an electric vehicle so as to discharge the secondary battery 201 of the electric vehicle 200 at night, the electric vehicle 200 that is constantly parked at night is connected. The charging / discharging device 41 for an electric vehicle is preferentially controlled. However, the present invention is not limited to this, and for example, the control unit 50 may control the charging / discharging device 41 for an electric vehicle to which the electric vehicle 200 parked for a long time is connected regardless of daytime or nighttime. The electric vehicle 200 parked for a long time is an electric vehicle 200 parked during the working hours of a customer or a factory employee as described in the above modification. Therefore, the control unit 50 controls the charging / discharging device 41 for the electric vehicle so as to discharge the secondary battery 201 of the electric vehicle 200 according to the working hours of the customer and the working hours of the employees of the factory. May be good.

〇 The request output from the charge controller 51 for industrial vehicles is input to the charge / discharge controller 52 for electric vehicles. The electric vehicle charging / discharging controller 52 controls the electric vehicle charging / discharging device 41 so as to discharge the secondary battery 201 when it is determined that the secondary battery 201 can be discharged, but the present invention is not limited to this.

For example, the management server 53 of the second embodiment may be modified to output a request to the charge / discharge controller 52 for an electric vehicle. In this case, the management server 53 of the electric vehicle 200 is based on at least one of the electric energy supplied from the system power source 90 to the facility distribution system 30 and the electric energy supplied from the facility distribution system 30 to the industrial vehicle charging device 21. It is preferable to have a function of outputting a request to the electric vehicle charge / discharge controller 52 so as to discharge the electric power charged in the secondary battery 201.

〇 In the above modification example, the management server 53 may further have a function of determining whether or not the secondary battery 201 can be discharged. Then, when the management server 53 determines that the secondary battery 201 can be discharged, the electric vehicle charging / discharging controller 52 may be changed to issue a command to operate the electric vehicle charging / discharging device 41. .. That is, the charging controller 51 for industrial vehicles and the charging / discharging controller 52 for electric vehicles are changed so as to have only a function of controlling the charging device 21 for industrial vehicles and the charging / discharging device 41 for electric vehicles based on a command from the management server 53. You may.

〇 In each of the above embodiments, one of the plurality of first lower breakers 33 of the factory distribution board 31 is combined with the second lower breaker 35 of the lift charging distribution board 34 and the third lower of the electric vehicle distribution board 36. The breaker 37 was electrically connected, but is not limited to this. For example, the second lower breaker 35 of the electric vehicle distribution board 36 and the third lower breaker 37 of the electric vehicle distribution board 36 may be electrically connected to different first lower breakers 33. It may be changed as follows.

As shown in FIG. 3, the third lower breaker 37 of the electric vehicle distribution board 36 may be directly connected to the upper breaker 32 of the factory distribution board 31. Further, the second lower breaker 35 of the electric vehicle distribution board 36 may also be directly connected to the upper breaker 32 of the factory distribution board 31.

〇 The charging device 21 for an industrial vehicle has a function of charging the secondary battery 101 of the battery forklift 100, but may have a function of discharging the secondary battery 101, for example. When the function of discharging the secondary battery 101 is added to the charging device 21 for an industrial vehicle, for example, the control unit 50 supplies the electric power discharged from the secondary battery 101 of the battery forklift 100 to the charging / discharging device 41 for an electric vehicle. It may be changed as follows. At this time, the charging controller 51 for industrial vehicles determines whether or not the secondary battery 101 can be discharged based on the information regarding the operation schedule of the battery forklift 100 by inputting the request from the charging / discharging controller 52 for electric vehicles. You may. Then, the industrial vehicle charging controller 51 may control the industrial vehicle charging device 21 so as to discharge the secondary battery 101 when it is determined that the secondary battery 101 can be discharged.

〇 In each of the above embodiments, the charging controller 51 for industrial vehicles monitors the amount of power supplied from the system power supply 90 to the factory distribution board 31, and sets the power amount set in the upper breaker 32. When the amount of electric energy supplied from the system power supply 90 to the upper breaker 32 is reached, the above request is output to the electric vehicle charge / discharge controller 52, but the present invention is not limited to this. For example, the industrial vehicle charge controller 51 may output the above request to the electric vehicle charge / discharge controller 52 when the total amount of electric energy supplied to the plurality of first lower breakers 33 reaches the above set value. Good. Even with this change, the industrial vehicle charging controller 51 uses the electric vehicle charging / discharging device 41 to discharge the secondary battery 201 based on the amount of power supplied from the system power supply 90 to the facility distribution system 30. I'm in control.

〇 Further, the charging controller 51 for industrial vehicles monitors the amount of electric power supplied from the system power supply 90 to the charging device 21 for industrial vehicles, and the first lower breaker 33 connected to the lift charging distribution board 34. When the amount of electric energy supplied from the system power supply 90 to the first lower breaker 33 via the upper breaker 32 reaches the set value of the electric energy set in, the above request is output to the electric vehicle charging / discharging device 41. It may be changed as follows. The set value is, for example, a value set for the amount of power that can be supplied from the system power supply 90 to the lift charging distribution board 34, and is lower than the upper limit of the amount of power that can be used for charging the battery forklift 100. It has been set. That is, the set value is set from the viewpoint of not stopping the charging of the battery forklift 100. That is, even if the charging controller 51 for an industrial vehicle controls the charging / discharging device 41 for an electric vehicle so as to discharge the secondary battery 201 based on the amount of electric energy supplied from the system power supply 90 to the charging device 21 for the industrial vehicle. Good.

〇 As a method of monitoring the amount of electric power supplied from the system power supply 90 to the industrial vehicle charging device 21 by the industrial vehicle charging controller 51, for example, electric power is generated between the factory distribution board 31 and the lift charging distribution board 34. A device for monitoring the power may be provided. The industrial vehicle charge controller 51 may output the above request to the electric vehicle charge / discharge controller 52 when the electric energy monitored by the device reaches the set value of the above modification example. Even with this change, the industrial vehicle charging controller 51 is an electric vehicle charging / discharging device that discharges the secondary battery 201 based on the amount of electric energy supplied from the system power supply 90 to the industrial vehicle charging device 21. 41 is controlled.

〇 The industrial vehicle charge controller 51 monitors the electric power supplied to the industrial vehicle charging device 21 from the plurality of second lower breakers 35 of the lift charging distribution board 34, and the total electric energy thereof is When the set value of the above modification example is reached, the above request may be output to the electric vehicle charge / discharge controller 52. Even with this change, the industrial vehicle charging controller 51 is an electric vehicle charging / discharging device that discharges the secondary battery 201 based on the amount of electric energy supplied from the system power supply 90 to the industrial vehicle charging device 21. 41 is controlled.

〇 The charging controller 51 for industrial vehicles may control the charging / discharging device 41 for electric vehicles so as to discharge the secondary battery 201 based on the amount of electric energy supplied from the system power source 90 to the charging device 21 for industrial vehicles. However, the amount of power supplied from the system power source 90 to the charging device 21 for industrial vehicles may be, for example, the amount of power to be supplied to the battery forklift 100. In this case, it is preferable that the number of battery forklifts 100 coming to the charging station for charging can be grasped in advance based on the information on the operation schedule of the battery forklifts 100.

〇 The set value in the first embodiment may be set from the viewpoint of reducing the amount of carbon dioxide generated in the factory. Further, from the viewpoint that the set value in the first embodiment does not exceed, for example, the withstand voltage of the first lower breaker 33 connected to the upper breaker 32, the lift charging distribution board 34, and the electric vehicle distribution board 36. It may be set. Therefore, the set value in the first embodiment can be appropriately changed according to the needs of the customer when the charging / discharging system 10 described in the present embodiment is adopted.

〇 For example, the industrial vehicle charging controller 51 monitors the number of industrial vehicle charging devices 21 used for charging, and when the number reaches the set number, the above request is made to the electric vehicle. It may be output to the charge / discharge controller 52. If the amount of power per unit time supplied from each industrial vehicle charging device 21 to the battery forklift 100 is known in advance, the amount of power supplied from the facility distribution system 30 to the industrial vehicle charging device 21 by this method as well. Can be confirmed.

〇 The industrial vehicle charge controller 51 may be mounted on the industrial vehicle charge device 21. Further, the charge / discharge controller 52 for an electric vehicle may be mounted on the charge / discharge device 41 for an electric vehicle.

〇 The industrial vehicle charge controller 51 may be changed so as to be mounted on any one of the plurality of industrial vehicle charge devices 21. Further, the electric vehicle charge / discharge controller 52 may be changed so as to be mounted on any one of the plurality of electric vehicle charge / discharge devices 41. When changed in this way, the industrial vehicle charging controller 51 mounted on any one of the plurality of industrial vehicle charging devices 21 replaces the industrial vehicle charging device 21 not equipped with the industrial vehicle charging controller 51. Control. Similarly, the electric vehicle charge / discharge controller 52 mounted on any one of the plurality of electric vehicle charge / discharge devices 41 is an electric vehicle charge / discharge device 41 that is not equipped with the electric vehicle charge / discharge controller 52. Control.

〇 The charging device 21 for industrial vehicles converts the AC power from the system power supply 90 into DC power and supplies it to the battery forklift 100 even if the AC power from the system power supply 90 is supplied to the battery forklift 100. It may be. When AC power from the system power supply 90 is supplied to the battery forklift 100, a power conversion device for converting AC power into DC power is mounted inside the battery forklift 100.

〇 The communication lines L1, L2, L3, and L4 may be wireless.
〇 The battery forklift 100 was mentioned as an industrial vehicle, but it is not limited to this. For example, an automatic guided vehicle may be adopted as an industrial vehicle. Any industrial vehicle having the secondary battery 101 may be changed. Although a lithium ion battery has been adopted as the secondary battery 101, the type of battery may be changed as appropriate.

〇 In each of the above embodiments, the charge / discharge system 10 has been described on the premise that it is used in a factory, but it may be, for example, a distribution center. That is, the charge / discharge system 10 of the present embodiment can be applied to the facility where the industrial vehicle having the secondary battery 101 is used.

10 ... Charging / discharging system, 20 ... Charging system for industrial vehicles, 21 ... Charging device for industrial vehicles, 30 ... Facility distribution system, 31 ... Factory distribution board, 34 ... Lift charging distribution board, 40 ... Charging for electric vehicles Discharge system, 41 ... Charge / discharge device for electric vehicle, 50 ... Control unit, 51 ... Charge controller for industrial vehicle, 52 ... Charge / discharge controller for electric vehicle, 90 ... System power supply, 100 ... Battery forklift, 101 ... Secondary battery, 200 ... electric vehicle, 201 ... secondary battery.

Claims (4)

A charging device for industrial vehicles that charges the secondary batteries of industrial vehicles,
A facility distribution system that supplies power from a grid power supply to the industrial vehicle charging device, and
A charging / discharging device for electric vehicles that charges / discharges the secondary battery of an electric vehicle,
A charging / discharging system including a charging device for an industrial vehicle and a control unit for controlling a charging / discharging device for an electric vehicle.
The control unit is the secondary of the electric vehicle based on at least one of the electric energy supplied from the system power source to the facility distribution system and the electric energy supplied from the facility distribution system to the industrial vehicle charging device. A charging / discharging system characterized in that the charging / discharging device for an electric vehicle is controlled so as to discharge a battery. The control unit
An industrial vehicle charging controller that controls the industrial vehicle charging device,
The electric vehicle charging / discharging controller for controlling the electric vehicle charging / discharging device is provided.
The industrial vehicle charging controller is based on at least one of the electric energy supplied from the system power source to the facility distribution system and the electric energy supplied from the facility distribution system to the industrial vehicle charging device. A request is output to the electric vehicle charge / discharge controller to discharge the secondary battery.
The charge / discharge controller for the electric vehicle determines whether or not the secondary battery of the electric vehicle can be discharged based on the information about the operation schedule of the electric vehicle when the request is input, and determines that the secondary battery of the electric vehicle can be discharged. The charging / discharging system according to claim 1, wherein the charging / discharging device for the electric vehicle is controlled so as to discharge the secondary battery of the electric vehicle when the electric vehicle is charged. When the control unit controls the charging / discharging device for the electric vehicle so as to discharge the secondary battery of the electric vehicle at night, the electric vehicle that is constantly parked at night is connected to the control unit. The charging / discharging system according to claim 1 or 2, wherein the charging / discharging device for an electric vehicle is preferentially controlled. When the control unit controls the charging / discharging device for the electric vehicle so as to discharge the secondary battery of the electric vehicle in the daytime, the electric vehicle that is constantly parked in the daytime is connected to the control unit. The charging / discharging system according to any one of claims 1 to 3, wherein the charging / discharging device for an electric vehicle is preferentially controlled.