JP6922666B2 - Electricity rate calculation system - Google Patents

Description

The present disclosure relates to an electricity rate calculation system.

In recent years, hybrid vehicles and electricity that can be charged by the electric power supplied from the electric power system via a charging device such as an external charging stand and can supply electric power to external facilities such as homes and business establishments. There are vehicles that can be charged and discharged, such as automobiles. Promoting the spread of chargeable / discharging vehicles is useful from the viewpoint of the environment as well as from the viewpoint of increasing the capacity to respond to peak times of electric power demand. For example, when the total amount of electric power that can be supplied from the electric power system is insufficient for the electric power demand, the electric load stored in the chargeable / dischargeable vehicle is used to operate the electric load in the external facility such as the electric equipment in the house. This is because it can be made to. In this way, when charge / dischargeable vehicles become widespread, it becomes possible to utilize a large number of charge / dischargeable vehicle power storage devices as a part of the power grid.

As a plan for promoting the spread of such chargeable / discharging vehicles, the real unit price applied to the amount of electric power used in facilities outside the vehicle such as homes and business establishments is set as the first real unit price. At that time, a charge system that applies a second real unit price, which is cheaper than the first real unit price, to the amount of electric power used in the chargeable / dischargeable vehicle may be useful. However, when such a charge system is used, when the power supplied from the power system to the chargeable / dischargeable vehicle through the charging device of the house is supplied to the facility outside the vehicle without being used by the chargeable / dischargeable vehicle, this supplied power is supplied. The second real unit price will be applied to the vehicle even though it is used in a facility outside the vehicle. Therefore, if the power supply from the chargeable / discharging vehicle to the facility outside the vehicle is unlimited, it may not be possible to calculate an appropriate electricity charge.

Therefore, in the electricity rate calculation system described in Patent Document 1 below, when electric power is supplied from a chargeable / discharging vehicle to an external facility, the first real unit price is applied to the electric energy amount.

Japanese Unexamined Patent Publication No. 2016-25682

By the way, in the electricity charge calculation system described in Patent Document 1, a vehicle capable of charging / discharging using an external charging device other than the charging / discharging device in the system, for example, a charging device installed in a parking area of a highway. If the power storage device is charged, it may not be possible to calculate an appropriate electricity rate. Specifically, when the power storage device is charged by using the charging device outside the system, the electricity charge for the charged power is usually paid when the charging is completed. Therefore, when power is subsequently supplied from the chargeable / dischargeable vehicle to the facility outside the vehicle, if the user of the vehicle is billed for the electricity charge to which the first real unit price is applied to the power, the power consumption is charged. There is a risk of double billing.

The present disclosure has been made in view of such circumstances, and the purpose of the present disclosure is to calculate an appropriate electricity rate even when the electricity storage device of the vehicle is charged by using the charging device outside the system. The purpose is to provide a calculation system.

The electricity charge calculation system (1) that solves the above problems includes a charge / discharge device (26) capable of charging and discharging the power storage device (400) mounted on the vehicle (40), and a power storage device from the charge / discharge device to the vehicle. A computing device (20) that calculates the amount of power to be charged based on the amount of power charged in the vehicle and the amount of power discharged from the power storage device of the vehicle to the charging / discharging device. The computing device calculates the amount of off-system charging power charged to the vehicle's power storage device from a charging device other than the charging / discharging device, and subtracts the amount of out-of-system charging power from the amount of discharging power of the power storage device. Adjust the electricity bill for.

According to this configuration, when the power storage device of the vehicle is charged by the charging device outside the system and then the vehicle discharges to the charging / discharging device, the discharge power amount is used to determine the outside of the system. The electricity charge is adjusted for the remaining electric energy excluding the electric energy charged in. As a result, the electricity charge can be adjusted so that there is no inconvenience with respect to the amount of electricity discharged using the electric power charged by the charging / discharging device in the system, so that an appropriate electricity charge can be calculated. ..

The reference numerals in parentheses described in the above means and claims are examples showing the correspondence with the specific means described in the embodiments described later.

According to the present disclosure, it is possible to provide an electricity charge calculation system capable of calculating an appropriate electricity charge even when the electricity storage device of a vehicle is charged by using an out-of-system charging device.

FIG. 1 is a block diagram showing a schematic configuration of the electricity rate calculation system of the embodiment. FIG. 2 is a flowchart showing a part of the processing executed by the HEMS apparatus of the embodiment. FIG. 3 is a flowchart showing a part of the processing executed by the HEMS apparatus of the embodiment.

Hereinafter, an embodiment of the electricity rate calculation system will be described with reference to the drawings. In order to facilitate understanding of the description, the same components are designated by the same reference numerals as much as possible in each drawing, and duplicate description is omitted.
As shown in FIG. 1, the electricity charge calculation system 1 of the present embodiment includes a HEMS (Home Energy Management System) device 20, a photovoltaic power generation device 21, a distribution board 22, and the HEMS (Home Energy Management System) device 20 provided inside the house 10. It includes a measuring device 23, a power storage device 24, and an electric device 25. Further, the electricity charge calculation system 1 includes a charging / discharging device 26 provided outside the house 10.

The photovoltaic power generation device 21 generates electricity by converting the energy of sunlight into DC power by a solar panel arranged on the roof of a house. The DC power generated by the photovoltaic power generation device 21 is converted into AC power that can be used in the house 10 by a PCS (Power Conditioning System) (not shown), and then supplied to the distribution board 22.

The distribution board 22 supplies AC power supplied from the power system 30 and the photovoltaic power generation device 21 to the power storage device 24, various electric devices 25, the charging / discharging device 26, and the like. The electric device 25 is a device in the house 10 that is driven by AC power supplied directly from the distribution board 22 or via an outlet or the like. The distribution board 22 has a function of detecting the individual power consumption of the power storage device 24, the charging / discharging device 26, the electric device 25, and the like. The distribution board 22 also has a function of detecting the amount of power generated by the photovoltaic power generation device 21.

The measuring device 23 measures the amount of AC power supplied from the power system 30 to the distribution board 22, that is, the amount of power consumed by the entire house 10.
The power storage device 24 charges the AC power supplied from the power system 30 and the photovoltaic power generation device 21 via the distribution board 22 after converting the AC power into power suitable for charging. The power storage device 24 can supply charging power to the charging / discharging device 26 and various electric devices 25 via the distribution board 22.

The charging / discharging device 26 charges the power storage device 400 mounted on the vehicle 40 based on the AC power supplied from the power system 30, the photovoltaic power generation device 21, the power storage device 24, etc. via the distribution board 22. It is a device of. Further, the charging / discharging device 26 can also supply electric power to the power storage device 24 and the electric device 25 via the distribution board 22 by discharging the power storage device 24 of the vehicle 40. The charging / discharging device 26 includes a power amount measuring unit 260, a data communication unit 261, an operation unit 262, and a cable 263.

The operation unit 262 is a part operated by the user. The operation unit 262 can select, for example, whether to charge or discharge the in-vehicle power storage device 400. Further, the operation unit 262 can also perform an operation of interrupting charging and an operation of interrupting discharging.
A connection portion 263a is provided at the tip of the cable 263. By connecting the connecting portion 263a to the connected portion of the vehicle 40, the in-vehicle power storage device 400 can be charged and discharged. The vehicle 40 is provided with a lock mechanism 401 that locks the connection portion 263a when charging or discharging of the in-vehicle power storage device 400 is started after the connection portion 263a is connected to the connected portion. The lock mechanism 401 unlocks the connection portion 263a when the charging or discharging of the vehicle-mounted power storage device 400 is completed, or when the charging interrupting operation or the discharging interrupting operation is performed. This makes it possible to remove the connecting portion 263a from the connected portion of the vehicle 40.

The electric energy measuring unit 260 measures the amount of electric power charged in the in-vehicle electric energy storage device 400 and the amount of electric power discharged from the in-vehicle electric energy storage device 400.
The data communication unit 261 can communicate with the data communication unit 402 of the vehicle 40 by wired communication or wireless communication via the cable 263. The data communication unit 261 can acquire various information of the vehicle 40 by communicating with the data communication unit 402 of the vehicle 40. The information that the data communication unit 261 can acquire from the vehicle 40 includes, for example, information on the current remaining electric energy of the in-vehicle power storage device 400, information on the total electric energy consumed by the in-vehicle power storage device 400 up to now, and the lock mechanism 401. Information on locking and unlocking the connection portion 263a is included.

The vehicle 40 is a hybrid vehicle, an electric vehicle, or the like that can charge the in-vehicle power storage device 400 and can supply electric power to an external facility such as a home or a business establishment by discharging the in-vehicle power storage device 400. It is a chargeable / dischargeable vehicle. The power storage device 400 can be charged not only by the charging / discharging device 26 in the system installed in the house 10, but also by, for example, an out-of-system charging device installed in a parking area of a highway.

The HEMS device 20 is mainly composed of a microcomputer having an arithmetic unit, a storage device, and the like. The HEMS device 20 is communicably connected to the distribution board 22, the measuring device 23, and the charging / discharging device 26. The HEMS device 20 acquires information such as individual power consumption of the power storage device 24, the electric device 25, and the like, and the amount of power generated by the photovoltaic power generation device 21 from the distribution board 22. The HEMS device 20 acquires information on the power consumption of the entire house 10 from the measuring device 23. In the HEMS device 20, information on the charging power amount and the discharging power amount of the vehicle 40, information on whether or not the charging / discharging operation is performed on the charging / discharging device 26, and the connection unit 263a are provided from the charging / discharging device 26. Obtain information and the like regarding whether or not the vehicle is connected to the vehicle 40. Further, the HEMS device 20 acquires various information about the vehicle 40 from the charging / discharging device 26. Various information about the vehicle 40 includes information on the current remaining electric energy of the in-vehicle power storage device 400, information on the total electric energy consumed by the in-vehicle power storage device 400 up to now, and locking and locking of the connection portion 263a by the lock mechanism 401. Contains information about cancellation. The HEMS device 20 manages the electric power of the house 10 based on the electric power information acquired from the distribution board 22, the measuring device 23, the charging / discharging device 26, and the like.

Further, the HEMS device 20 is communicably connected to the management center 60 via the network line 50. The HEMS device 20 notifies the management center 60 of the power information of the house 10 via the network line 50. The management center 60 determines the electricity charge to be charged to the resident of the house 10 based on the electric power information transmitted from the HEMS device 20.

Specifically, with respect to the electricity rate of the house 10, the first real unit price is applied to the amount of electric power consumed by the electric device 25 or the like. On the other hand, in order to promote rechargeable vehicles, the second real unit price, which is cheaper than the first real unit price, has come to be applied to the amount of electric power used to charge the in-vehicle power storage device 400. There is. As the second real unit price, for example, a fixed monthly electricity rate can be used.

In view of such a charge system, the HEMS device 20 manages information on the amount of electric power charged from the charging / discharging device 26 to the vehicle 40, and the management center 60 uses this electric energy as the second real unit price applicable electric energy E20. Notify to. Further, the HEMS device 20 acquires information on the power consumption of the entire house 10 from the measuring device 23, and subtracts the second real unit price applicable power amount E20 from the acquired power consumption of the entire house 10 to obtain the power amount. 1 Notify the management center 60 as the actual unit price applicable electric energy E10. The management center 60 multiplies the charge obtained by multiplying the first real unit price applied electric energy E10 notified from the HEMS apparatus 20 by the first real unit price, and the second real unit price applied electric energy E20 by the second real unit price. By adding the charge obtained by doing so, the electricity charge to be charged to the resident of the house 10 is determined.

By the way, when such a charge system is used, the second real unit price is applied to the amount of electric power discharged from the vehicle 40 to the facility outside the vehicle such as the charging / discharging device 26. Since such discharge power is not used in the vehicle 40, it is the power to which the first real unit price should be applied. However, if the first real unit price is uniformly applied to the discharge power of the vehicle 40, inconvenience may occur.

Specifically, when the user charges the in-vehicle power storage device 400 using an external charging device other than the charging / discharging device 26 of the system 1, the payment of the electricity charge for the charged power is charging. Is done when is completed. In such a situation, when the vehicle 40 discharges to the charging / discharging device 26 or the like using this charging power, if the first real unit price is applied to the discharging power, it is inconvenient because it will be charged twice. be.

Therefore, in the electricity charge calculation system 1 of the present embodiment, the amount of power charged outside the system, which is the amount of power charged to the in-vehicle power storage device 400 by the charging device outside the system, is excluded from the billing target. In other words, in the electricity charge calculation system 1 of the present embodiment, the HEMS device 20 calculates the remaining electric energy obtained by subtracting the out-of-system charging electric energy from the electric energy discharged from the in-vehicle power storage device 400, and this electric energy. The charge to which the first real unit price is applied is included in the electricity charge charged to the residents of the house 10. Hereinafter, the discharge power to which the first real unit price is applied will be referred to as “chargeable discharge power” for convenience. As described above, in the present embodiment, the HEMS device 20 corresponds to the arithmetic unit that calculates the electric energy to be charged.

Next, with reference to FIGS. 2 and 3, a specific procedure for calculating the chargeable discharge power executed by the HEMS device 20 will be described. The HEMS device 20 repeatedly executes the processes shown in FIGS. 2 and 3 at a predetermined cycle.
As shown in FIG. 2, the HEMS device 20 first determines whether or not the vehicle 40 is connected to the charging / discharging device 26 by communication with the charging / discharging device 26 as the process of step S10. When the HEMS apparatus 20 makes a negative determination in the process of step S10, the HEMS device 20 ends a series of processes shown in FIGS. 2 and 3.

If the HEMS device 20 makes an affirmative decision in the process of step S10, the HEMS device 20 determines whether or not there is a charge / discharge request by communicating with the charge / discharge device 26 as the process of step S11. Specifically, the HEMS device 20 determines that a charge / discharge request has been made when a charge operation or a discharge operation is performed on the operation unit 262 of the charge / discharge device 26. When the HEMS device 20 makes a negative determination in the process of step S11, as the process of step S12, the HEMS device 20 determines whether or not the connection between the charge / discharge device 26 and the vehicle 40 has been disconnected by communication with the charge / discharge device 26. do. Specifically, the HEMS device 20 determines that the connection portion 263a of the cable 263 of the charging / discharging device 26 has been removed from the vehicle 40, thereby determining that the connection between the charging / discharging device 26 and the vehicle 40 has been released. If the HEMS apparatus 20 makes a negative determination in the process of step S12, the HEMS device 20 returns to the process of step S11. When the HEMS device 20 makes a positive judgment in the process of step S12 while the negative judgment is made in the process of step S11, that is, the charging operation or the discharging operation is not performed on the charging / discharging device 26, that is, the charging / discharging device 20 is charged. When the connection between the discharge device 26 and the vehicle 40 is disconnected, the series of processes shown in FIGS. 2 and 3 is terminated.

When the HEMS device 20 makes an affirmative decision in the process of step S11, that is, when the charging / discharging operation is performed on the charging / discharging device 26, the HEMS device 20 and the charging / discharging device 26 are treated as the process of step S13. Through communication, the current power consumption E1 which is the total power consumed by the in-vehicle power storage device 400 up to now is acquired. Since the vehicle 40 normally charges or discharges the in-vehicle power storage device 400 by the in-vehicle power storage device 26 after traveling, the current power consumption E1 is the total power consumed by the in-vehicle power storage device 400 by the time after the vehicle 40 travels. It can be said to be a quantity.

Following the process of step S13, the HEMS device 20 performs the process of step S14, which is the total amount of power consumed by the in-vehicle power storage device 400 from the previous charge / discharge of the vehicle 40 to the current charge / discharge of the vehicle 40 during the current travel. Calculate the power consumption E3. Specifically, the storage device of the HEMS device 20 consumes the total amount of power consumed by the in-vehicle power storage device 400 by the time of the completion of the previous charge / discharge by the process of step S30 shown in FIG. Information on the electric energy E2 is stored. The HEMS device 20 calculates the current running power consumption E3 by subtracting the previous power consumption E2 from the current power consumption E1.

Following the process of step S14, the HEMS device 20 calculates the remaining charge power amount E5 in the system as the process of step S15. The remaining charge power amount E5 in the system indicates the charge power amount charged from the charge / discharge device 26 to the vehicle-mounted power storage device 400 among the power amounts currently charged to the vehicle-mounted power storage device 400. Specifically, the HEMS device 20 charges the in-system charging power amount E4, which is the amount of power charged from the charging / discharging device 26 to the in-vehicle power storage device 400 at the time of the previous charge completion by the process of step S19 shown in FIG. Information is obtained from the charging / discharging device 26. The HEMS device 20 calculates the remaining charge power amount E5 in the system by subtracting the power consumption amount E3 during traveling this time from the charge power amount E4 in the system.

After the user of the vehicle 40 charges the in-vehicle power storage device 400 using the external charging device during the period from the previous charge / discharge to the current charge / discharge, the charging power of the in-vehicle power storage device 400 is greatly consumed. In this case, the power consumption E3 during running this time may be larger than the charging power E4 in the system. That is, the remaining charge power amount E5 in the system may be a negative value. In this case, the HEMS device 20 sets the remaining charge power amount E5 in the system to zero.

Following the process of step S15, the HEMS device 20 acquires the remaining electric energy E6 of the current in-vehicle power storage device 400 from the charge / discharge device 26 as the process of step S16.
Following the process of step S16, the HEMS device 20 calculates the amount of off-system charging power E7, which is the amount of power charged to the in-vehicle power storage device 400 by the off-system charging device, as the process of step S17. Specifically, the HEMS device 20 calculates the out-of-system charging electric energy E7 by subtracting the in-system remaining charging electric energy E5 from the remaining electric energy E6.

Following the process of step S17, the HEMS device 20 determines whether or not charging of the in-vehicle power storage device 400 is completed as the process of step S18, as shown in FIG. If the HEMS device 20 makes a negative determination in the process of step S18, the HEMS device 20 determines whether or not the discharge of the in-vehicle power storage device 400 is completed as the process of step S21. If the HEMS apparatus 20 makes a negative determination in the process of step S21, the HEMS device 20 returns to the process of step S18. In this way, the HEMS device 20 monitors whether or not the charging or discharging of the in-vehicle power storage device 400 is completed.

When the HEMS device 20 makes an affirmative decision in the process of step S18, that is, when the charging of the in-vehicle power storage device 400 is completed, the in-vehicle power storage device 400 is charged from the charge / discharge device 26 as the process of step S19. Information on the amount of electric power charged in the system E4, which is the amount of electric power, is acquired from the charging / discharging device 26. Further, the HEMS device 20 records the in-system charging electric energy E4 as the second real unit price applicable electric energy E20 as the process of step S20.

When the HEMS device 20 makes an affirmative decision in the process of step S21, that is, when the discharge of the in-vehicle power storage device 400 is completed, the in-vehicle power storage device 400 is discharged from the charge / discharge device 26 as the process of step S22. Acquires information on the electric energy E8. Subsequently, the HEMS device 20 calculates the chargeable discharge electric energy E9 to which the first real unit price should be applied as the process of step S23. Specifically, the HEMS device 20 calculates the chargeable discharge electric energy E9 by subtracting the out-of-system charge electric energy E7 from the discharge electric energy E8.

Following the process of step S23, the HEMS device 20 determines whether or not the chargeable discharge power amount E9 is less than zero as the process of step S24. When the HEMS device 20 makes an affirmative decision in the process of step S24, that is, when the chargeable discharge power amount E9 is less than zero, the in-vehicle power storage device 400 discharges within the range of the out-of-system charge power amount E7. Judge that it was damaged. In this case, the HEMS device 20 updates the out-of-system charge electric energy E7 by storing the absolute value of the chargeable discharge electric energy E9 in the storage device as a new out-of-system charge electric energy E7 as the process of step S25. ..

When the HEMS device 20 makes a negative determination in the process of step S24, that is, when the chargeable discharge electric energy E9 is a positive value, the discharge of the in-vehicle power storage device 400 covers the range of the out-of-system charge electric energy E7. It is determined that the charge power in the system exceeds the range of E4. In this case, the HEMS apparatus 20 records the chargeable discharge electric energy E9 as the first real unit price applicable electric energy E10 as the process of step S26. At this time, the chargeable discharge electric energy E9 is subtracted from the second real unit price applicable electric energy E20. As a result, with respect to the chargeable discharge electric energy E9, the normal first real unit price is applied instead of the second real unit price.

Following the process of step S26, the HEMS device 20 sets the out-of-system charge electric energy E7 to zero as the process of step S27, and sets the in-system charge electric energy E4 to the chargeable discharge electric energy as the process of step S28. The in-system charging electric energy E4 is updated by storing the value obtained by subtracting E9 as a new in-system charging electric energy E4 in the storage device.

When any of the processes of steps S20, S25, and S28 is executed, the HEMS device 20 determines whether or not the lock of the connection portion 263a of the cable 263 by the lock mechanism 401 has been released as the process of step S29. If the HEMS device 20 makes an affirmative decision in the process of step S29, the HEMS device 20 updates the previous power consumption amount E2 as the process of step S30. Specifically, the HEMS device 20 uses the charge / discharge device 26 to obtain the total amount of power consumed by the vehicle-mounted power storage device 400 up to now, that is, the total amount of power consumed by the vehicle-mounted power storage device 400 by the time of the completion of the current charge / discharge. At the same time as acquiring, the previous power consumption amount E2 is updated by storing the acquired power consumption amount information as the previous power consumption amount E2 in the storage device.

In this way, the HEMS device 20 calculates the amount of off-system charging power E7 charged in the in-vehicle power storage device 400 from an out-of-system charging device different from the charging / discharging device 26 of the system 1, and discharges the in-vehicle power storage device 400. The electricity charge for the remaining electric energy E9 obtained by subtracting the out-of-system charging electric energy E7 from the electric energy E8 is adjusted. As a result, when the in-vehicle power storage device 400 is charged by the off-system charging device and then the vehicle 40 is discharged to the charging / discharging device 26, the in-vehicle power storage device 400 is charged outside the system based on the amount of discharged power. The electricity charge for the remaining electric energy excluding the discharged electricity is adjusted. As a result, the electricity charge can be adjusted so that there is no inconvenience with respect to the amount of electricity discharged using the electric power charged by the charging / discharging device 26 in the system, so that an appropriate electricity charge can be calculated.

The above embodiment can also be implemented in the following embodiments.
The HEMS device 20 may manage the electric energy E1 to E10, the first real unit price applied electric energy E10, and the second real unit price applied electric energy E20 for each of a plurality of vehicles. Specifically, when a vehicle is connected to the charging / discharging device 26, the HEMS device 20 identifies the vehicle connected to the charging / discharging device 26 by acquiring information on the identification number of the vehicle. As a result, even when a plurality of vehicles are connected to the charging / discharging device 26, the HEMS device 20 can identify the vehicle currently connected to the charging / discharging device 26. Then, the HEMS device 20 individually executes the processes shown in FIGS. 2 and 3 for the identification number of the vehicle. As a result, it is possible to manage the electric energy E1 to E10, the first real unit price applicable electric power amount E10, and the second real unit price applied electric power amount E20 for each of the plurality of vehicles.

-The configuration of the electricity charge calculation system 1 of the above embodiment can be applied to a system in which a plurality of charge / discharge devices 26 are provided. In this case, if the plurality of charge / discharge devices share the amount of electric power required for calculating the electricity charge and execute the processes shown in FIGS. 2 and 3, the appropriate electricity charge can be calculated.

The means and / or functions provided by the HEMS device 20 can be provided by software stored in a substantive storage device and a computer, software only, hardware only, or a combination thereof that executes the software. For example, when the HEMS device 20 is provided by an electronic circuit which is hardware, it can be provided by a digital circuit including a large number of logic circuits or an analog circuit.

-The present disclosure is not limited to the above specific examples. Specific examples described above with appropriate design changes by those skilled in the art are also included in the scope of the present disclosure as long as they have the features of the present disclosure. Each element included in each of the above-mentioned specific examples, and their arrangement, conditions, shape, and the like are not limited to those illustrated, and can be changed as appropriate. The combinations of the elements included in each of the above-mentioned specific examples can be appropriately changed as long as there is no technical contradiction.

1: Electricity charge calculation system 20: HEMS device (arithmetic device)
26: Charging / discharging device 40: Vehicle 400: Power storage device

Claims (2)

A charging / discharging device (26) capable of charging and discharging the power storage device (400) mounted on the vehicle (40), and a charging / discharging device (26).
A calculation device that calculates the amount of power to be charged based on the amount of power charged from the charge / discharge device to the power storage device of the vehicle and the amount of power discharged from the power storage device of the vehicle to the charge / discharge device ( 20) and
The arithmetic unit
The amount of off-system charging power charged to the power storage device of the vehicle from a charging device different from the charging / discharging device is calculated.
An electricity charge calculation system that adjusts the electricity charge for the remaining electric energy obtained by subtracting the charge power amount outside the system from the discharge electric energy of the power storage device. The arithmetic unit
Obtain the identification number of the vehicle and
The electricity charge calculation system according to claim 1, wherein the amount of electric power to be charged is calculated individually for the identification number.

Images