WO2014097409A1 - Rapid charger - Google Patents

Rapid charger Download PDF

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Publication number
WO2014097409A1
WO2014097409A1 PCT/JP2012/082841 JP2012082841W WO2014097409A1 WO 2014097409 A1 WO2014097409 A1 WO 2014097409A1 JP 2012082841 W JP2012082841 W JP 2012082841W WO 2014097409 A1 WO2014097409 A1 WO 2014097409A1
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WO
WIPO (PCT)
Prior art keywords
power
amount
storage battery
target
soct
Prior art date
Application number
PCT/JP2012/082841
Other languages
French (fr)
Japanese (ja)
Inventor
敬峰 向井
Original Assignee
Ｊｆｅエンジニアリング株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Ｊｆｅエンジニアリング株式会社 filed Critical Ｊｆｅエンジニアリング株式会社
Priority to PCT/JP2012/082841 priority Critical patent/WO2014097409A1/en
Publication of WO2014097409A1 publication Critical patent/WO2014097409A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/46—Accumulators structurally combined with charging apparatus
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a quick charger.
  • Patent Document 1 includes a single quick charger for an electric vehicle and a quick charge distributor that distributes power from the quick charger for the electric vehicle to each of n charging adapters.
  • a quick charger for electric vehicles When charging an electric vehicle using a quick charger for electric vehicles, the total of the current values flowing through each charging adapter is maximized within the range of the maximum output current value of the quick charger for electric vehicles, A technique for charging a single electric vehicle is disclosed.
  • a quick charger having a power receiving means for receiving power from a commercial power supply, it is desired that the amount of power received through the power receiving means can be reduced.
  • An object of the present invention is to provide a quick charger that can reduce the amount of power received from a commercial power source.
  • the quick charger of the present invention includes a power receiving means connected to a commercial power source, a storage battery connected to the power receiving means, an output connected to the power receiving means and the storage battery, and outputs electric power for charging to an external device. And a target value for the amount of electricity stored in the storage battery varies according to the power received via the power receiving means.
  • the target value of the charged amount when the power received through the power receiving unit is small is larger than the target value of the stored amount when the power received through the power receiving unit is large. Is preferred.
  • the target value of the charged amount is a charging time per time for the external device, a maximum power output to the external device, and a power received via the power receiving means. Is preferably based on
  • the upper limit of the target value of the storage amount corresponds to a product of the maximum output of the storage battery and the charging time per time.
  • the electric power received through the power receiving means is based on an external command value, and the target value of the charged amount is further changed by a change range per time of the external command value. Is preferably based on
  • the target value of the storage amount of the storage battery changes according to the power received through the power receiving means. According to the quick charger according to the present invention, there is an effect that the amount of power received from the commercial power source can be reduced.
  • FIG. 1 is a schematic configuration diagram of a quick charger according to the embodiment.
  • FIG. 2 is a diagram illustrating a relationship between the received power and the target power storage amount according to the embodiment.
  • FIG. 3 is a time chart relating to charging and discharging of the quick charger according to the embodiment.
  • FIG. 4 is another diagram illustrating the relationship between the received power and the target power storage amount according to the embodiment.
  • FIG. 5 is a diagram illustrating a relationship between the received power and the target power storage amount according to the second modification of the embodiment.
  • FIG. 1 is a schematic configuration diagram of a quick charger according to the embodiment.
  • a quick charger 1-1 shown in FIG. 1 is connected to an AC / DC converter 6 as a power receiving means, an equipment storage battery 10 connected to the AC / DC converter 6, and an AC / DC converter 6 and the equipment storage battery 10. And a first DC / DC converter 7 as output means for outputting electric power for charging to an external device.
  • the quick charger 1-1 can function as a power storage facility that can store electric power received from a commercial power source. Further, the quick charger 1-1 can function as a power storage facility capable of appropriately discharging the power stored in the facility storage battery 10 to the store side via the AC / DC converter 6.
  • the quick charger 1-1 includes a bus 5, an AC / DC converter 6, a first DC / DC converter 7, a power conditioner 8, a second DC / DC converter 9, and a storage battery for equipment. 10, an output line 11, and a control device 20.
  • the distribution board 2 is connected to the commercial power line 1.
  • the distribution board 2 is connected to a store power line 3 and a charger power line 4. That is, the quick charger 1-1 is connected to the store via the charger power line 4, the distribution board 2, and the store power line 3.
  • the store power line 3 supplies power to a power consumption facility outside the quick charger 1-1, for example, a store such as a convenience store.
  • the quick charger 1-1 and the store are connected to a commercial power source through a common circuit including the distribution board 2.
  • the bus 5 is connected to the power supply line 4 for the charger via the AC / DC converter 6.
  • the AC / DC converter 6 converts the alternating current input from the power supply line 4 for the charger into a direct current and outputs it to the bus 5, and converts the direct current input from the bus 5 into an alternating current for the charger.
  • the power can be output to the power line 4.
  • the output line 11 is connected to the bus 5 via the first DC / DC converter 7.
  • the output line 11 is a power supply line that supplies electric power to a battery of an external device, in this embodiment, a battery mounted on an electric vehicle (EV).
  • the electric vehicle EV includes not only one having no power source other than the electric motor but also a hybrid vehicle having a power source such as an internal combustion engine in addition to the electric motor.
  • the first DC / DC converter 7 converts the direct current voltage of the bus 5 into a target voltage and outputs it to the output line 11.
  • a storage battery 10 for equipment is connected to the bus 5 via a second DC / DC converter 9.
  • the storage battery 10 for facilities can be charged and discharged.
  • the storage battery 10 for equipment of this embodiment is a lithium ion storage battery.
  • the effective capacity (storage capacity) of the facility storage battery 10 is Qb (kWh).
  • the effective capacity Qb is a capacity in a range used in the charge / discharge control among the total capacity of the facility storage battery 10. For example, when charge / discharge control is performed in the range of 10% to 90% of the total capacity of the storage battery 10 for facilities, the effective capacity Qb is a value of 80% of the total capacity.
  • the second DC / DC converter 9 converts the voltage of the direct current of the bus 5 into a target voltage and outputs it to the facility storage battery 10, and the target voltage of the direct current discharged from the facility storage battery 10 Can be output to the bus 5. Even if the voltage of the storage battery 10 for facilities changes according to the storage amount SOC, the second DC / DC converter 9 can suppress fluctuations in the voltage output to the bus 5. Therefore, the stability of the voltage supplied to the electric vehicle EV can be improved. In addition, since the second DC / DC converter 9 is arranged, the number of batteries of the storage battery 10 for facilities (the number of series connection) can be changed without reassembling the circuit.
  • a solar power generation device 12 is connected to the bus 5 via a power conditioner 8.
  • the solar power generation device 12 converts the light energy of sunlight into electrical energy and outputs a direct current.
  • the maximum value of the generated power is 20 kW.
  • the power conditioner 8 has a DC / DC converter and can execute MPPT (Maximum Power Point Tracking) control.
  • the MPPT control is control for causing the solar power generation device 12 to generate power at a voltage and current value that can maximize the output.
  • the current generated by the solar power generation device 12 is output to the bus 5 via the power conditioner 8.
  • the power conditioner 8 increases the output voltage to the bus 5 higher than the voltage of the storage battery 10 for facilities in the control of the input power Pg input from the solar power generator 12 to the bus 5. When the input power Pg becomes equal to the generated power of the solar power generation device 12, the balance is automatically made. Note that the power conditioner 8 controls the output voltage to the bus 5 to be equal to or lower than the voltage when the storage battery 10 for facilities is fully charged.
  • the control device 20 controls the quick charger 1-1.
  • the control device 20 of the present embodiment is connected to the AC / DC converter 6, the first DC / DC converter 7, the second DC / DC converter 9, the storage battery 10 for equipment, and the power conditioner 8, respectively. 6. Control the first DC / DC converter 7, the second DC / DC converter 9, the storage battery 10 for equipment, and the power conditioner 8.
  • the facility storage battery 10 has a monitoring device that monitors the temperature and voltage of the facility storage battery 10, the storage amount SOC (kWh), the current value to be charged and discharged, and the like.
  • the control device 20 acquires information related to the facility storage battery 10 from the monitoring device for the facility storage battery 10.
  • the storage amount SOC is calculated in the range of the effective capacity Qb. For example, when charge / discharge control is performed within the range of 10% to 90% of the total capacity of the storage battery 10 for facilities, the storage amount SOC is calculated by setting the remaining amount of 10% of the total capacity to 0 (kWh) of the storage amount SOC. Is done.
  • the storage rate (%) of the facility storage battery 10 is such that the remaining amount of 10% of the total capacity of the facility storage battery 10 is 0% of the storage rate, and the remaining amount of 90% of the total capacity is 100% of the storage rate. It becomes.
  • Control device 20 determines transmission / reception power Pqc (kW) that is power received from charger power supply line 4 via AC / DC converter 6 or discharged to charger power supply line 4 via AC / DC converter 6. .
  • Control device 20 outputs a command value of voltage and current to be output to bus 5 or a command value of voltage and current to be discharged to charger power supply line 4 based on transmission / reception power Pqc.
  • the AC / DC converter 6 controls the voltage and current output to the bus 5 or the voltage and current discharged to the charger power supply line 4 based on the command value received from the control device 20.
  • a current value input / output via the AC / DC converter 6 is referred to as an exchange current value Iqc.
  • the control device 20 sets the output power Po (kW) to be supplied to the electric vehicle EV in response to a charging request from the electric vehicle EV connected to the output line 11.
  • the maximum output power Pomax which is the maximum value of the output power Po, is 50 kW, but it may be any value.
  • the control device 20 outputs to the first DC / DC converter 7 a voltage and current command value to be output to the output line 11 based on a request from the electric vehicle EV.
  • the first DC / DC converter 7 controls the voltage and current output from the bus 5 to the output line 11 based on the command value from the control device 20.
  • the control device 20 acquires input power Pg (voltage and current) generated by the solar power generation device 12 and input to the bus 5 from the power conditioner 8.
  • the control device 20 can instruct the power conditioner 8 to shut off the solar power generation device 12 and the bus 5 and set the input power Pg to zero.
  • the control device 20 determines the discharge power Pb of the facility storage battery 10 and outputs a voltage and current command value output from the facility storage battery 10 to the bus 5 based on the discharge power Pb, or outputs from the bus 5 to the facility storage battery 10.
  • the voltage and current command values are output to the second DC / DC converter 9.
  • the second DC / DC converter 9 controls the voltage and current output from the facility storage battery 10 to the bus 5 or the voltage and current output from the bus 5 to the facility storage battery 10 based on the command value from the control device 20. To do.
  • the demand controller 15 is connected to the control device 20.
  • the demand controller 15 is an external control device that controls the power-receiving demand by combining the power consumption equipment connected to the store power line 3 and the quick charger 1-1.
  • the demand controller 15 detects the power received from the commercial power supply line 1 via the distribution board 2 and calculates the amount of power received per predetermined time.
  • the demand controller 15 outputs a command value (allowable maximum power) indicating the maximum value of power that can be received by the quick charger 1-1 based on the calculated power amount.
  • the quick charger 1-1 determines the transfer power Pqc based on the allowable maximum power output from the demand controller 15.
  • the power received from the commercial power supply via the AC / DC converter 6 is set to be equal to or lower than the allowable maximum power.
  • the control device 20 receives the power via the AC / DC converter 6 with the transmission / reception power Pqc as the allowable maximum power.
  • the control device 20 causes the facility storage battery 10 to discharge when the exchanged power Pqc is insufficient with respect to the output power Po.
  • control device 20 outputs at least a part of the output power Po that is insufficient with the exchanged power Pqc from the input power Pg from the solar power generation device 12 and discharges it to the facility storage battery 10 when the power is insufficient. It can also be made to do.
  • the amount of power received from a commercial power source can be reduced.
  • the amount of power received can be reduced during the daytime when the unit price of the power rate is relatively high or during peak hours when the power demand is high.
  • the target value of the storage amount SOC of the facility storage battery 10 changes according to the power received via the AC / DC converter 6 as the power receiving means.
  • the target value of the stored electricity amount SOC can be appropriately determined according to the received power, and the received power amount can be reduced.
  • the target value of the storage amount SOC is the upper limit of the storage amount SOC when the facility storage battery 10 is stored. Therefore, even if the charged amount SOC exceeds the target value, it is not necessary to reduce the charged amount SOC to the target value.
  • FIG. 2 is a diagram illustrating a relationship between the received power and the target power storage amount according to the embodiment.
  • the horizontal axis indicates the received power received from the commercial power supply via the AC / DC converter 6, and the vertical axis indicates the target value of the storage amount SOC (hereinafter referred to as “target storage amount SOCt”).
  • the received power on the horizontal axis may be the power actually received by the quick charger 1-1 or the command value from the demand controller 15, that is, the allowable maximum power.
  • FIG. 2 shows the relationship between the received power and the target charged amount SOCt when the maximum output of the facility storage battery 10 is equal to or greater than the maximum output power Pomax for the electric vehicle EV.
  • the maximum output power Pomax is 50 kW. Therefore, when the maximum output of the facility storage battery 10 is 50 kW or more, the target storage amount SOCt is determined based on the correspondence shown in FIG.
  • the target storage amount SOCt when the received power is small is larger than the target storage amount SOCt when the received power is large. Therefore, when large electric power can be received from the commercial power source, the charged amount SOC can be kept low, and the received power amount from the commercial power source can be suppressed.
  • the relationship between the received power and the target charged amount SOCt is linear, and the target charged amount SOCt decreases as the received power increases.
  • the target charged amount SOCt is determined by the charging time Tchg per time for an external device, the maximum power output to the external device (maximum output power Pomax), and AC / Based on the power received via the DC converter 6.
  • the target power storage amount SOCt can continue to output the maximum output power Pomax to the electric vehicle EV by the received power from the commercial power source and the discharge power Pb of the facility storage battery 10 during one charging time Tchg. It is stipulated in.
  • the target storage amount SOCt is determined so that, for example, the charging of the electric vehicle EV can be completed by the discharge power Pb of the facility storage battery 10 even when the received power is 0 kW.
  • the charging time Tchg (maximum charging time) per electric vehicle EV is 30 min (0.5 h).
  • the storage amount SOC needs to be 25 kWh.
  • the target storage amount SOCt when the received power is 0 kW is 25 kWh. If the storage amount SOC is 25 kWh at the start of charging of the electric vehicle EV, the charging of the electric vehicle EV can be completed by the facility storage battery 10 even if the received power is 0 kW.
  • the target storage amount SOCt when the received power is 50 kW or more is 0 kWh. If the received power is 50 kW or more, it is possible to complete charging of the electric vehicle EV with the received power even if the storage amount SOC of the facility storage battery 10 is 0 kWh. If the storage battery 10 for facilities is stored based on the target storage amount SOCt shown in FIG. 2, the output power Po of 50 kW is continuously supplied to the electric vehicle EV during the charging time Tchg regardless of the received power. be able to.
  • the target charged amount SOCt is set to a minimum value that can complete the charging of the electric vehicle EV. Therefore, the amount of power received from the commercial power source can be minimized.
  • FIG. 3 is a time chart relating to charging / discharging of the quick charger 1-1 according to the present embodiment.
  • the horizontal axis indicates time
  • the vertical axis indicates the storage amount SOC.
  • the electric vehicle EV is charged between time t1 and t2 (first time), between time t3 and t4 (second time), and between time t5 and t6 (third time). Done.
  • the storage amount SOC after the first charge and the second charge is larger than the target storage amount SOCt, respectively. Accordingly, the storage of the facility storage battery 10 is not performed after the charging is completed.
  • the storage amount SOC after the third charge is less than the target storage amount SOCt.
  • the electrical storage with respect to the storage battery 10 for facilities is started from the time t6.
  • the storage amount SOC recovers to the target storage amount SOCt at time t7, the power reception from the commercial power supply is ended, and the storage of the facility storage battery 10 is ended. Thereafter, when the storage amount SOC falls below the target storage amount SOCt, the facility storage battery 10 is charged.
  • the storage amount SOC of the facility storage battery 10 can be kept to the minimum necessary for completing the charging of the electric vehicle EV. It is possible to suppress the amount of power received from the.
  • the method for determining the target charged amount SOCt may be performed constantly or when a predetermined condition is satisfied.
  • the method for determining the target storage amount SOCt as described above may be performed during a predetermined period or a predetermined time period.
  • the predetermined time zone can be, for example, a time zone in which the unit price of the power rate is relatively high in one day, for example, daytime time.
  • the predetermined time zone may be a time zone (heavy load time, peak time) when power demand is large.
  • the predetermined period can be, for example, summer.
  • the target power storage amount SOCt during the time period excluding the predetermined time period may be different from the target power storage amount SOCt during the predetermined time period.
  • the target power storage amount SOCt in the time zone excluding the predetermined time zone is desirably equal to or greater than the target power storage amount SOCt in the predetermined time zone, and is preferably larger than the target power storage amount SOCt in the predetermined time zone. In this way, in preparation for the discharge in the next predetermined time zone, the charged amount SOC can be sufficiently recovered in the time zone excluding the predetermined time zone.
  • the target power storage amount SOCt when the received power is large may be made larger than the target power storage amount SOCt when the received power is low, contrary to the predetermined time zone.
  • the target power storage amount SOCt when the power reception amount is 0 kW may be common between the predetermined time zone and a time zone other than the predetermined time zone.
  • the target power storage amount SOCt when the received power in the time zone other than the predetermined time zone is 0 kW may be 25 kWh.
  • the relationship between the target power storage amount SOCt and the received power in a time zone other than the predetermined time zone can be linear, for example.
  • the target storage amount SOCt in the time period excluding the predetermined time period may be a constant value, for example, the maximum value (storage rate 100%) of the storage amount SOC.
  • the facility storage battery 10 can be charged to the maximum extent in preparation for discharge in the next predetermined time period.
  • FIG. 4 is another diagram showing the relationship between the received power and the target charged amount SOCt according to the embodiment.
  • FIG. 4 shows the relationship between the received power and the target charged amount SOCt when the maximum output of the facility storage battery 10 is less than the maximum output power Pomax for the electric vehicle EV.
  • the maximum value of the target storage amount SOCt is the maximum amount of power output from the facility storage battery 10 in one charge time Tchg.
  • the relationship between the received power and the target storage amount SOCt shown in FIG. 4 is that the maximum output of the facility storage battery 10 is 25 kW and the charging time Tchg is 0.5 h, and the maximum value of the target storage amount SOCt is 12.5 kWh. It is.
  • the upper limit of the target storage amount SOCt corresponds to the product of the maximum output of the facility storage battery 10 and the charging time Tchg per time.
  • the target storage amount SOCt is constant at the maximum value of 25 kWh.
  • the target charged amount SOCt is variable.
  • the target charged amount SOCt when the received power is small is larger than the target charged amount SOCt when the received power is large.
  • the relationship between the received power and the target charged amount SOCt is linear in the received power region greater than 25 kW.
  • the storage when storing in the facility storage battery 10, the storage is stopped when the storage amount SOC reaches the target storage amount SOCt.
  • the storage using the input power Pg from the solar power generation device 12 is not performed. It may be performed separately. That is, the target storage amount SOCt can be the upper limit of the storage amount SOC when the facility storage battery 10 is stored by receiving power from a commercial power source.
  • Power storage using the input power Pg from the solar power generation device 12 may be executed regardless of the target power storage amount SOCt. For example, power may be stored using the input power Pg up to the maximum power storage amount SOC.
  • the relationship between the received power and the target charged amount SOCt when the target charged amount SOCt changes according to the received power is not limited to linear.
  • the target storage amount SOCt may change stepwise with respect to a change in received power.
  • the target power storage amount SOCt may be decreased by a certain amount every time the received power increases by a certain amount.
  • FIG. 5 is a diagram illustrating a relationship between the received power and the target charged amount SOCt according to the second modification of the embodiment.
  • the target charged amount SOCt is indicated by a white circle ( ⁇ ).
  • the solid line shown in FIG. 5 is the minimum storage amount SOC required to complete the charging of the electric vehicle EV when the received power is constant.
  • a predetermined margin hereinafter referred to as “addition amount ⁇ S” is added to the minimum required storage amount SOC in preparation for fluctuations in the maximum allowable power to determine the target storage amount SOCt. ing.
  • the allowable maximum power output from the demand controller 15 can fluctuate according to the detected amount of power received. Even when the allowable maximum power is reduced, it is preferable that the charging of the electric vehicle EV can be completed in one charging time Tchg.
  • the target power storage amount SOCt includes the addition amount ⁇ S.
  • the addition amount ⁇ S may be a constant value or may be variable according to the received power.
  • the addition amount ⁇ S may be a predetermined ratio (for example, 5% or 10%) with respect to the minimum required storage amount SOC (value on the straight line in FIG. 5) determined from the current received power, for example. Good.
  • the addition amount ⁇ S when the received power is large may be smaller than the addition amount ⁇ S when the received power is small.
  • the shortage of the output power Po when charging the electric vehicle EV is suppressed because the target charged amount SOCt includes the added amount ⁇ S.
  • charging can be completed even when the allowable maximum power is reduced during charging of the electric vehicle EV.
  • the time interval at which the demand controller 15 changes the allowable maximum power is preferably equal to or longer than the charging time Tchg. In this way, even if the allowable maximum power changes during charging of the electric vehicle EV, the number of times is at most one. Therefore, it is possible to secure a minimum required storage amount SOC in preparation for a decrease in the allowable maximum power, and to suppress an excessive storage in the facility storage battery 10 and an increase in the amount of received power. .
  • the target of charging by the quick charger 1-1 is the electric vehicle EV.
  • the present invention is not limited to this, and other external devices may be charged.
  • the quick charger 1-1 may be one that does not receive power from an external power generator such as the solar power generator 12.
  • the quick charger 1-1 may receive power from a power generation device other than the solar power generation device 12, for example, a wind power generation device.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

A rapid charger, comprising: a power reception means connected to a commercial power supply; a storage battery connected to the power reception means; and an output means which is connected to the power reception means and the storage battery, and which outputs power for charging to an external device. The storage amount target value (SOCt) for the storage battery varies depending on the power received via the power reception means. The storage amount target value (SOCt), when the amount of power received via the power reception means is small, is preferably greater than the storage amount target value (SOCt) when the amount of power received via the power reception means is large.

Description

急速充電器Quick charger
　本発明は、急速充電器に関する。 The present invention relates to a quick charger.
　従来、急速充電器がある。例えば、特許文献１には、１台の電気自動車用急速充電器と、その電気自動車用急速充電器からの電力をｎ個の各充電アダプタに分配するようにした急速充電ディストリビューターとを備えた電気自動車用急速充電装置を用いて電気自動車を充電するに際して、各充電アダプタに流れる電流値の合計が電気自動車用急速充電器の最大出力電流値以下の範囲で最大となるようにしながら、同時に複数台の電気自動車の充電を行うようにする技術が開示されている。 Conventionally, there is a quick charger. For example, Patent Document 1 includes a single quick charger for an electric vehicle and a quick charge distributor that distributes power from the quick charger for the electric vehicle to each of n charging adapters. When charging an electric vehicle using a quick charger for electric vehicles, the total of the current values flowing through each charging adapter is maximized within the range of the maximum output current value of the quick charger for electric vehicles, A technique for charging a single electric vehicle is disclosed.
特開２０１１－１３０５９３号公報JP 2011-130593 A
　商用電源から受電する受電手段を有する急速充電器において、受電手段を介して受電する電力量を低減できることが望まれている。 In a quick charger having a power receiving means for receiving power from a commercial power supply, it is desired that the amount of power received through the power receiving means can be reduced.
　本発明の目的は、商用電源から受電する電力量を低減することができる急速充電器を提供することである。 An object of the present invention is to provide a quick charger that can reduce the amount of power received from a commercial power source.
　本発明の急速充電器は、商用電源と接続された受電手段と、前記受電手段と接続された蓄電池と、前記受電手段および前記蓄電池と接続され、外部の装置に対する充電用の電力を出力する出力手段と、を備え、前記蓄電池の蓄電量の目標値が、前記受電手段を介して受電する電力に応じて変化することを特徴とする。 The quick charger of the present invention includes a power receiving means connected to a commercial power source, a storage battery connected to the power receiving means, an output connected to the power receiving means and the storage battery, and outputs electric power for charging to an external device. And a target value for the amount of electricity stored in the storage battery varies according to the power received via the power receiving means.
　上記急速充電器において、前記受電手段を介して受電する電力が小さい場合の前記蓄電量の目標値は、前記受電手段を介して受電する電力が大きい場合の前記蓄電量の目標値よりも大きいことが好ましい。 In the quick charger, the target value of the charged amount when the power received through the power receiving unit is small is larger than the target value of the stored amount when the power received through the power receiving unit is large. Is preferred.
　上記急速充電器において、前記蓄電量の目標値は、前記外部の装置に対する１回当たりの充電時間と、前記外部の装置に対して出力する最大電力と、前記受電手段を介して受電する電力とに基づくことが好ましい。 In the quick charger, the target value of the charged amount is a charging time per time for the external device, a maximum power output to the external device, and a power received via the power receiving means. Is preferably based on
　上記急速充電器において、前記蓄電量の目標値の上限は、前記蓄電池の最大出力と前記１回当たりの充電時間との積に相当することが好ましい。 In the quick charger, it is preferable that the upper limit of the target value of the storage amount corresponds to a product of the maximum output of the storage battery and the charging time per time.
　上記急速充電器において、前記受電手段を介して受電する電力は、外部からの指令値に基づいており、前記蓄電量の目標値は、更に、前記外部からの指令値の１回当たりの変更幅に基づくことが好ましい。 In the quick charger, the electric power received through the power receiving means is based on an external command value, and the target value of the charged amount is further changed by a change range per time of the external command value. Is preferably based on
　本発明に係る急速充電器は、蓄電池の蓄電量の目標値が、受電手段を介して受電する電力に応じて変化する。本発明に係る急速充電器によれば、商用電源から受電する電力量を低減することができるという効果を奏する。 In the quick charger according to the present invention, the target value of the storage amount of the storage battery changes according to the power received through the power receiving means. According to the quick charger according to the present invention, there is an effect that the amount of power received from the commercial power source can be reduced.
図１は、実施形態に係る急速充電器の概略構成図である。FIG. 1 is a schematic configuration diagram of a quick charger according to the embodiment. 図２は、実施形態に係る受電電力と目標蓄電量との関係を示す図である。FIG. 2 is a diagram illustrating a relationship between the received power and the target power storage amount according to the embodiment. 図３は、実施形態の急速充電器の充放電に係るタイムチャートである。FIG. 3 is a time chart relating to charging and discharging of the quick charger according to the embodiment. 図４は、実施形態に係る受電電力と目標蓄電量との関係を示す他の図である。FIG. 4 is another diagram illustrating the relationship between the received power and the target power storage amount according to the embodiment. 図５は、実施形態の第２変形例に係る受電電力と目標蓄電量との関係を示す図である。FIG. 5 is a diagram illustrating a relationship between the received power and the target power storage amount according to the second modification of the embodiment.
　以下に、本発明の実施形態に係る急速充電器につき図面を参照しつつ詳細に説明する。なお、この実施形態によりこの発明が限定されるものではない。また、下記の実施形態における構成要素には、当業者が容易に想定できるものあるいは実質的に同一のものが含まれる。 Hereinafter, a quick charger according to an embodiment of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.
［実施形態］
　図１から図４を参照して、実施形態について説明する。本実施形態は、急速充電器に関する。図１は、実施形態に係る急速充電器の概略構成図である。 [Embodiment]
The embodiment will be described with reference to FIGS. 1 to 4. The present embodiment relates to a quick charger. FIG. 1 is a schematic configuration diagram of a quick charger according to the embodiment.
　図１に示す急速充電器１－１は、受電手段としてのＡＣ／ＤＣコンバータ６と、ＡＣ／ＤＣコンバータ６と接続された設備用蓄電池１０と、ＡＣ／ＤＣコンバータ６および設備用蓄電池１０と接続され、外部の装置に対して充電用の電力を出力する出力手段としての第一ＤＣ／ＤＣコンバータ７とを含んで構成されている。急速充電器１－１は、商用電源から受電した電力を蓄電することができる蓄電設備として機能することができる。また、急速充電器１－１は、設備用蓄電池１０に蓄電した電力をＡＣ／ＤＣコンバータ６を介して適宜店舗側に放電することが可能な蓄電設備として機能することができる。 A quick charger 1-1 shown in FIG. 1 is connected to an AC / DC converter 6 as a power receiving means, an equipment storage battery 10 connected to the AC / DC converter 6, and an AC / DC converter 6 and the equipment storage battery 10. And a first DC / DC converter 7 as output means for outputting electric power for charging to an external device. The quick charger 1-1 can function as a power storage facility that can store electric power received from a commercial power source. Further, the quick charger 1-1 can function as a power storage facility capable of appropriately discharging the power stored in the facility storage battery 10 to the store side via the AC / DC converter 6.
　本実施形態に係る急速充電器１－１は、バス５と、ＡＣ／ＤＣコンバータ６と、第一ＤＣ／ＤＣコンバータ７と、パワーコンディショナー８と、第二ＤＣ／ＤＣコンバータ９と、設備用蓄電池１０と、出力ライン１１と、制御装置２０とを含んで構成されている。 The quick charger 1-1 according to the present embodiment includes a bus 5, an AC / DC converter 6, a first DC / DC converter 7, a power conditioner 8, a second DC / DC converter 9, and a storage battery for equipment. 10, an output line 11, and a control device 20.
　分電盤２は、商用電源ライン１に接続されている。分電盤２には、店舗用電源ライン３および充電器用電源ライン４が接続されている。つまり、急速充電器１－１は、充電器用電源ライン４、分電盤２および店舗用電源ライン３を介して店舗と接続されている。店舗用電源ライン３は、急速充電器１－１の外部の電力消費設備、例えばコンビニエンスストア等の店舗に電力を供給する。本実施形態では、急速充電器１－１と店舗とは、分電盤２を含む共通の回路を介して商用電源に接続されている。 The distribution board 2 is connected to the commercial power line 1. The distribution board 2 is connected to a store power line 3 and a charger power line 4. That is, the quick charger 1-1 is connected to the store via the charger power line 4, the distribution board 2, and the store power line 3. The store power line 3 supplies power to a power consumption facility outside the quick charger 1-1, for example, a store such as a convenience store. In the present embodiment, the quick charger 1-1 and the store are connected to a commercial power source through a common circuit including the distribution board 2.
　バス５は、ＡＣ／ＤＣコンバータ６を介して充電器用電源ライン４と接続されている。ＡＣ／ＤＣコンバータ６は、充電器用電源ライン４から入力される交流電流を直流電流に変換してバス５に出力すること、およびバス５から入力される直流電流を交流電流に変換して充電器用電源ライン４に出力することができる。 The bus 5 is connected to the power supply line 4 for the charger via the AC / DC converter 6. The AC / DC converter 6 converts the alternating current input from the power supply line 4 for the charger into a direct current and outputs it to the bus 5, and converts the direct current input from the bus 5 into an alternating current for the charger. The power can be output to the power line 4.
　バス５には、第一ＤＣ／ＤＣコンバータ７を介して出力ライン１１が接続されている。出力ライン１１は、外部の装置の電池、本実施形態では電気自動車（ＥＶ）に搭載された電池に対して電力を供給する電源ラインである。ここで、電気自動車ＥＶは、電動機以外の動力源を有しないものだけでなく、電動機に加えて内燃機関等の動力源を有するハイブリッド自動車も含む。第一ＤＣ／ＤＣコンバータ７は、バス５の直流電流の電圧を目標とする電圧に変換して出力ライン１１に出力する。 The output line 11 is connected to the bus 5 via the first DC / DC converter 7. The output line 11 is a power supply line that supplies electric power to a battery of an external device, in this embodiment, a battery mounted on an electric vehicle (EV). Here, the electric vehicle EV includes not only one having no power source other than the electric motor but also a hybrid vehicle having a power source such as an internal combustion engine in addition to the electric motor. The first DC / DC converter 7 converts the direct current voltage of the bus 5 into a target voltage and outputs it to the output line 11.
　バス５には、第二ＤＣ／ＤＣコンバータ９を介して設備用蓄電池１０が接続されている。設備用蓄電池１０は、充電および放電が可能なものである。本実施形態の設備用蓄電池１０は、リチウムイオン蓄電池である。設備用蓄電池１０の有効容量（蓄電容量）は、Ｑｂ（ｋＷｈ）である。なお、有効容量Ｑｂは、設備用蓄電池１０の全容量のうち、充放電制御において使用される範囲の容量である。例えば、設備用蓄電池１０の全容量の１０％から９０％の範囲で充放電制御を行う場合、有効容量Ｑｂは、全容量の８０％の値である。 A storage battery 10 for equipment is connected to the bus 5 via a second DC / DC converter 9. The storage battery 10 for facilities can be charged and discharged. The storage battery 10 for equipment of this embodiment is a lithium ion storage battery. The effective capacity (storage capacity) of the facility storage battery 10 is Qb (kWh). The effective capacity Qb is a capacity in a range used in the charge / discharge control among the total capacity of the facility storage battery 10. For example, when charge / discharge control is performed in the range of 10% to 90% of the total capacity of the storage battery 10 for facilities, the effective capacity Qb is a value of 80% of the total capacity.
　第二ＤＣ／ＤＣコンバータ９は、バス５の直流電流の電圧を目標とする電圧に変換して設備用蓄電池１０に出力すること、および設備用蓄電池１０から放電される直流電流を目標とする電圧に変換してバス５に出力することが可能である。第二ＤＣ／ＤＣコンバータ９は、蓄電量ＳＯＣに応じて設備用蓄電池１０の電圧が変化したとしても、バス５に出力する電圧の変動を抑制することができる。従って、電気自動車ＥＶに対して供給する電圧の安定性を向上させることができる。また、第二ＤＣ／ＤＣコンバータ９が配置されていることで、回路の組み直しをすることなく設備用蓄電池１０のバッテリの個数（直列つなぎの個数）を変更することができる。 The second DC / DC converter 9 converts the voltage of the direct current of the bus 5 into a target voltage and outputs it to the facility storage battery 10, and the target voltage of the direct current discharged from the facility storage battery 10 Can be output to the bus 5. Even if the voltage of the storage battery 10 for facilities changes according to the storage amount SOC, the second DC / DC converter 9 can suppress fluctuations in the voltage output to the bus 5. Therefore, the stability of the voltage supplied to the electric vehicle EV can be improved. In addition, since the second DC / DC converter 9 is arranged, the number of batteries of the storage battery 10 for facilities (the number of series connection) can be changed without reassembling the circuit.
　バス５には、パワーコンディショナー８を介して太陽光発電装置１２が接続されている。太陽光発電装置１２は、太陽光の光エネルギーを電気エネルギーに変換して直流電流を出力する。本実施形態の太陽光発電装置１２は、発電電力の最大値が２０ｋＷである。パワーコンディショナー８は、ＤＣ／ＤＣコンバータを有しており、ＭＰＰＴ（Maximum　Power　Point　Tracking）制御を実行することができる。ＭＰＰＴ制御は、出力を最大化できる電圧および電流値で太陽光発電装置１２に発電を行わせる制御である。太陽光発電装置１２により発電された電流は、パワーコンディショナー８を介してバス５に出力される。 A solar power generation device 12 is connected to the bus 5 via a power conditioner 8. The solar power generation device 12 converts the light energy of sunlight into electrical energy and outputs a direct current. In the solar power generation device 12 of the present embodiment, the maximum value of the generated power is 20 kW. The power conditioner 8 has a DC / DC converter and can execute MPPT (Maximum Power Point Tracking) control. The MPPT control is control for causing the solar power generation device 12 to generate power at a voltage and current value that can maximize the output. The current generated by the solar power generation device 12 is output to the bus 5 via the power conditioner 8.
　パワーコンディショナー８は、太陽光発電装置１２からバス５に入力する入力電力Ｐｇの制御において、バス５への出力電圧を設備用蓄電池１０の電圧よりも高めていく。入力電力Ｐｇが太陽光発電装置１２の発電電力に等しくなると、自動的にバランスする。なお、パワーコンディショナー８は、バス５への出力電圧を設備用蓄電池１０の満充電時の電圧以下に制御する。 The power conditioner 8 increases the output voltage to the bus 5 higher than the voltage of the storage battery 10 for facilities in the control of the input power Pg input from the solar power generator 12 to the bus 5. When the input power Pg becomes equal to the generated power of the solar power generation device 12, the balance is automatically made. Note that the power conditioner 8 controls the output voltage to the bus 5 to be equal to or lower than the voltage when the storage battery 10 for facilities is fully charged.
　制御装置２０は、急速充電器１－１を制御する。本実施形態の制御装置２０は、ＡＣ／ＤＣコンバータ６、第一ＤＣ／ＤＣコンバータ７、第二ＤＣ／ＤＣコンバータ９、設備用蓄電池１０およびパワーコンディショナー８とそれぞれ接続されており、ＡＣ／ＤＣコンバータ６、第一ＤＣ／ＤＣコンバータ７、第二ＤＣ／ＤＣコンバータ９、設備用蓄電池１０およびパワーコンディショナー８を制御する。 The control device 20 controls the quick charger 1-1. The control device 20 of the present embodiment is connected to the AC / DC converter 6, the first DC / DC converter 7, the second DC / DC converter 9, the storage battery 10 for equipment, and the power conditioner 8, respectively. 6. Control the first DC / DC converter 7, the second DC / DC converter 9, the storage battery 10 for equipment, and the power conditioner 8.
　設備用蓄電池１０は、設備用蓄電池１０の温度や電圧、蓄電量ＳＯＣ（ｋＷｈ）、充放電する電流値等を監視する監視装置を有している。制御装置２０は、設備用蓄電池１０の監視装置から、設備用蓄電池１０に関する情報を取得する。なお、蓄電量ＳＯＣは、有効容量Ｑｂの範囲で算出される。例えば、設備用蓄電池１０の全容量の１０％から９０％の範囲内で充放電制御がなされる場合、全容量の１０％の残量を蓄電量ＳＯＣの０（ｋＷｈ）として蓄電量ＳＯＣが算出される。また、設備用蓄電池１０の蓄電率（％）は、設備用蓄電池１０の全容量の１０％の残量が蓄電率の０％であり、全容量の９０％の残量が蓄電率の１００％となる。 The facility storage battery 10 has a monitoring device that monitors the temperature and voltage of the facility storage battery 10, the storage amount SOC (kWh), the current value to be charged and discharged, and the like. The control device 20 acquires information related to the facility storage battery 10 from the monitoring device for the facility storage battery 10. The storage amount SOC is calculated in the range of the effective capacity Qb. For example, when charge / discharge control is performed within the range of 10% to 90% of the total capacity of the storage battery 10 for facilities, the storage amount SOC is calculated by setting the remaining amount of 10% of the total capacity to 0 (kWh) of the storage amount SOC. Is done. The storage rate (%) of the facility storage battery 10 is such that the remaining amount of 10% of the total capacity of the facility storage battery 10 is 0% of the storage rate, and the remaining amount of 90% of the total capacity is 100% of the storage rate. It becomes.
　制御装置２０は、充電器用電源ライン４からＡＣ／ＤＣコンバータ６を介して受電、あるいはＡＣ／ＤＣコンバータ６を介して充電器用電源ライン４に放電する電力である授受電力Ｐｑｃ（ｋＷ）を決定する。制御装置２０は、授受電力Ｐｑｃに基づいてバス５に出力する電圧および電流の指令値、あるいは充電器用電源ライン４に放電する電圧および電流の指令値を出力する。ＡＣ／ＤＣコンバータ６は、制御装置２０から受け取った指令値に基づいて、バス５に出力する電圧および電流あるいは充電器用電源ライン４に放電する電圧および電流を制御する。本明細書では、ＡＣ／ＤＣコンバータ６を介して入出力する電流値を授受電流値Ｉqcと称する。 Control device 20 determines transmission / reception power Pqc (kW) that is power received from charger power supply line 4 via AC / DC converter 6 or discharged to charger power supply line 4 via AC / DC converter 6. . Control device 20 outputs a command value of voltage and current to be output to bus 5 or a command value of voltage and current to be discharged to charger power supply line 4 based on transmission / reception power Pqc. The AC / DC converter 6 controls the voltage and current output to the bus 5 or the voltage and current discharged to the charger power supply line 4 based on the command value received from the control device 20. In the present specification, a current value input / output via the AC / DC converter 6 is referred to as an exchange current value Iqc.
　また、制御装置２０は、出力ライン１１に接続された電気自動車ＥＶからの充電要求に応じて、電気自動車ＥＶに対して供給する出力電力Ｐｏ（ｋＷ）を設定する。本実施形態では、出力電力Ｐｏの最大値である最大出力電力Ｐｏｍａｘは、５０ｋＷとするが、いずれの値であっても構わない。制御装置２０は、電気自動車ＥＶからの要求に基づいて出力ライン１１に出力する電圧および電流の指令値を第一ＤＣ／ＤＣコンバータ７に出力する。第一ＤＣ／ＤＣコンバータ７は、制御装置２０からの指令値に基づいて、バス５から出力ライン１１に出力する電圧および電流を制御する。制御装置２０は、パワーコンディショナー８から、太陽光発電装置１２によって発電されてバス５に入力される入力電力Ｐｇ（電圧および電流）を取得する。制御装置２０は、パワーコンディショナー８に指令して太陽光発電装置１２とバス５とを遮断し、入力電力Ｐｇを０とすることが可能である。 Further, the control device 20 sets the output power Po (kW) to be supplied to the electric vehicle EV in response to a charging request from the electric vehicle EV connected to the output line 11. In the present embodiment, the maximum output power Pomax, which is the maximum value of the output power Po, is 50 kW, but it may be any value. The control device 20 outputs to the first DC / DC converter 7 a voltage and current command value to be output to the output line 11 based on a request from the electric vehicle EV. The first DC / DC converter 7 controls the voltage and current output from the bus 5 to the output line 11 based on the command value from the control device 20. The control device 20 acquires input power Pg (voltage and current) generated by the solar power generation device 12 and input to the bus 5 from the power conditioner 8. The control device 20 can instruct the power conditioner 8 to shut off the solar power generation device 12 and the bus 5 and set the input power Pg to zero.
　制御装置２０は、設備用蓄電池１０の放電電力Ｐｂを決定し、放電電力Ｐｂに基づいて設備用蓄電池１０からバス５に出力する電圧および電流の指令値、あるいはバス５から設備用蓄電池１０に出力する電圧および電流の指令値を第二ＤＣ／ＤＣコンバータ９に出力する。第二ＤＣ／ＤＣコンバータ９は、制御装置２０からの指令値に基づいて、設備用蓄電池１０からバス５に出力する電圧および電流、あるいはバス５から設備用蓄電池１０に出力する電圧および電流を制御する。 The control device 20 determines the discharge power Pb of the facility storage battery 10 and outputs a voltage and current command value output from the facility storage battery 10 to the bus 5 based on the discharge power Pb, or outputs from the bus 5 to the facility storage battery 10. The voltage and current command values are output to the second DC / DC converter 9. The second DC / DC converter 9 controls the voltage and current output from the facility storage battery 10 to the bus 5 or the voltage and current output from the bus 5 to the facility storage battery 10 based on the command value from the control device 20. To do.
　制御装置２０には、デマンドコントローラ１５が接続されている。デマンドコントローラ１５は、店舗用電源ライン３に接続された電力消費設備と、急速充電器１－１とを合わせた受電のデマンドをコントロールする外部の制御装置である。デマンドコントローラ１５は、分電盤２を介して商用電源ライン１から受電する電力を検出し、所定時間当たりに受電する電力量を算出する。デマンドコントローラ１５は、算出した電力量に基づいて、急速充電器１－１が受電可能な電力の最大値を示す指令値（許容最大電力）を出力する。 The demand controller 15 is connected to the control device 20. The demand controller 15 is an external control device that controls the power-receiving demand by combining the power consumption equipment connected to the store power line 3 and the quick charger 1-1. The demand controller 15 detects the power received from the commercial power supply line 1 via the distribution board 2 and calculates the amount of power received per predetermined time. The demand controller 15 outputs a command value (allowable maximum power) indicating the maximum value of power that can be received by the quick charger 1-1 based on the calculated power amount.
　急速充電器１－１は、デマンドコントローラ１５から出力される許容最大電力に基づいて授受電力Ｐｑｃを決定する。ＡＣ／ＤＣコンバータ６を介して商用電源から受電する電力は、許容最大電力以下とされる。例えば、制御装置２０は、電気自動車ＥＶに対する充電を行う場合に、授受電力Ｐｑｃを許容最大電力としてＡＣ／ＤＣコンバータ６を介して受電する。制御装置２０は、出力電力Ｐｏに対して授受電力Ｐｑｃが不足する場合、設備用蓄電池１０に放電させる。また、制御装置２０は、出力電力Ｐｏに対して授受電力Ｐｑｃで不足する分の少なくとも一部を太陽光発電装置１２からの入力電力Ｐｇから出力し、更に不足する場合に設備用蓄電池１０に放電させるようにすることもできる。 The quick charger 1-1 determines the transfer power Pqc based on the allowable maximum power output from the demand controller 15. The power received from the commercial power supply via the AC / DC converter 6 is set to be equal to or lower than the allowable maximum power. For example, when charging the electric vehicle EV, the control device 20 receives the power via the AC / DC converter 6 with the transmission / reception power Pqc as the allowable maximum power. The control device 20 causes the facility storage battery 10 to discharge when the exchanged power Pqc is insufficient with respect to the output power Po. Further, the control device 20 outputs at least a part of the output power Po that is insufficient with the exchanged power Pqc from the input power Pg from the solar power generation device 12 and discharges it to the facility storage battery 10 when the power is insufficient. It can also be made to do.
　ここで、商用電源からの受電量を低減できることが望まれている。例えば、比較的電力料金の単価が高い昼間や、電力需要が多いピーク時間帯における受電量を低減できることが好ましい。 Here, it is desired that the amount of power received from a commercial power source can be reduced. For example, it is preferable that the amount of power received can be reduced during the daytime when the unit price of the power rate is relatively high or during peak hours when the power demand is high.
　本実施形態に係る急速充電器１－１では、設備用蓄電池１０の蓄電量ＳＯＣの目標値が、受電手段としてのＡＣ／ＤＣコンバータ６を介して受電する電力に応じて変化する。これにより、受電電力に応じて適宜蓄電量ＳＯＣの目標値を定めることができ、受電量を低減することが可能となる。なお、蓄電量ＳＯＣの目標値は、設備用蓄電池１０に蓄電をするときの蓄電量ＳＯＣの上限である。従って、蓄電量ＳＯＣが目標値を上回っているとしても、蓄電量ＳＯＣを目標値まで低下させる必要はない。 In the quick charger 1-1 according to the present embodiment, the target value of the storage amount SOC of the facility storage battery 10 changes according to the power received via the AC / DC converter 6 as the power receiving means. Thereby, the target value of the stored electricity amount SOC can be appropriately determined according to the received power, and the received power amount can be reduced. Note that the target value of the storage amount SOC is the upper limit of the storage amount SOC when the facility storage battery 10 is stored. Therefore, even if the charged amount SOC exceeds the target value, it is not necessary to reduce the charged amount SOC to the target value.
　図２は、実施形態に係る受電電力と目標蓄電量との関係を示す図である。図２において、横軸はＡＣ／ＤＣコンバータ６を介して商用電源から受電する受電電力、縦軸は、蓄電量ＳＯＣの目標値（以下、「目標蓄電量ＳＯＣｔ」と称する。）を示す。横軸の受電電力は、急速充電器１－１が実際に受電する電力であっても、デマンドコントローラ１５からの指令値、すなわち許容最大電力であってもよい。なお、図２は、設備用蓄電池１０の最大出力が、電気自動車ＥＶに対する最大出力電力Ｐｏｍａｘ以上である場合の受電電力と目標蓄電量ＳＯＣｔとの関係を示している。本実施形態では、最大出力電力Ｐｏｍａｘが５０ｋＷである。従って、設備用蓄電池１０の最大出力が５０ｋＷ以上である場合に図２に示す対応関係に基づいて目標蓄電量ＳＯＣｔが決定される。 FIG. 2 is a diagram illustrating a relationship between the received power and the target power storage amount according to the embodiment. In FIG. 2, the horizontal axis indicates the received power received from the commercial power supply via the AC / DC converter 6, and the vertical axis indicates the target value of the storage amount SOC (hereinafter referred to as “target storage amount SOCt”). The received power on the horizontal axis may be the power actually received by the quick charger 1-1 or the command value from the demand controller 15, that is, the allowable maximum power. FIG. 2 shows the relationship between the received power and the target charged amount SOCt when the maximum output of the facility storage battery 10 is equal to or greater than the maximum output power Pomax for the electric vehicle EV. In the present embodiment, the maximum output power Pomax is 50 kW. Therefore, when the maximum output of the facility storage battery 10 is 50 kW or more, the target storage amount SOCt is determined based on the correspondence shown in FIG.
　図２に示すように、受電電力が小さい場合の目標蓄電量ＳＯＣｔは、受電電力が大きい場合の目標蓄電量ＳＯＣｔよりも大きい。これにより、商用電源から大きな電力を受電できる場合に蓄電量ＳＯＣを低く保ち、商用電源からの受電量を抑制することができる。本実施形態では、受電電力と目標蓄電量ＳＯＣｔとの関係は線形であり、受電電力が大きくなるに従って目標蓄電量ＳＯＣｔが減少する。 As shown in FIG. 2, the target storage amount SOCt when the received power is small is larger than the target storage amount SOCt when the received power is large. Thereby, when large electric power can be received from the commercial power source, the charged amount SOC can be kept low, and the received power amount from the commercial power source can be suppressed. In the present embodiment, the relationship between the received power and the target charged amount SOCt is linear, and the target charged amount SOCt decreases as the received power increases.
　本実施形態では、以下に説明するように、目標蓄電量ＳＯＣｔは、外部の装置に対する１回当たりの充電時間Ｔchgと、外部の装置に対して出力する最大電力（最大出力電力Ｐｏｍａｘ）と、ＡＣ／ＤＣコンバータ６を介して受電する電力とに基づく。目標蓄電量ＳＯＣｔは、１回の充電時間Ｔchgの間、商用電源からの受電電力と設備用蓄電池１０の放電電力Ｐｂとによって電気自動車ＥＶに対して最大出力電力Ｐｏｍａｘを出力し続けることができるように定められている。 In the present embodiment, as will be described below, the target charged amount SOCt is determined by the charging time Tchg per time for an external device, the maximum power output to the external device (maximum output power Pomax), and AC / Based on the power received via the DC converter 6. The target power storage amount SOCt can continue to output the maximum output power Pomax to the electric vehicle EV by the received power from the commercial power source and the discharge power Pb of the facility storage battery 10 during one charging time Tchg. It is stipulated in.
　目標蓄電量ＳＯＣｔは、例えば、受電電力が０ｋＷであっても設備用蓄電池１０の放電電力Ｐｂによって電気自動車ＥＶに対する充電を完了することができるように定められる。本実施形態では、電気自動車ＥＶに対する１回当たりの充電時間Ｔchg（最大充電時間）は、３０ｍｉｎ（０．５ｈ）である。設備用蓄電池１０が最大出力電力Ｐｏｍａｘである５０ｋＷを０．５ｈ出力し続けるためには、蓄電量ＳＯＣが２５ｋＷｈ必要である。図２に示すように、受電電力が０ｋＷである場合の目標蓄電量ＳＯＣｔは、２５ｋＷｈである。電気自動車ＥＶに対する充電開始時に蓄電量ＳＯＣが２５ｋＷｈであれば、受電電力が０ｋＷであっても設備用蓄電池１０によって電気自動車ＥＶに対する充電を完了することが可能である。 The target storage amount SOCt is determined so that, for example, the charging of the electric vehicle EV can be completed by the discharge power Pb of the facility storage battery 10 even when the received power is 0 kW. In the present embodiment, the charging time Tchg (maximum charging time) per electric vehicle EV is 30 min (0.5 h). In order for the facility storage battery 10 to continue to output 50 kW, which is the maximum output power Pomax, for 0.5 h, the storage amount SOC needs to be 25 kWh. As shown in FIG. 2, the target storage amount SOCt when the received power is 0 kW is 25 kWh. If the storage amount SOC is 25 kWh at the start of charging of the electric vehicle EV, the charging of the electric vehicle EV can be completed by the facility storage battery 10 even if the received power is 0 kW.
　また、受電電力が５０ｋＷ以上である場合の目標蓄電量ＳＯＣｔは、０ｋＷｈである。受電電力が５０ｋＷ以上であれば、設備用蓄電池１０の蓄電量ＳＯＣが０ｋＷｈであっても、受電電力によって電気自動車ＥＶに対する充電を完了することが可能である。図２に示す目標蓄電量ＳＯＣｔに基づいて設備用蓄電池１０に蓄電するようにすれば、受電電力にかかわらず、充電時間Ｔchgの間、電気自動車ＥＶに対して５０ｋＷの出力電力Ｐｏを供給し続けることができる。 In addition, the target storage amount SOCt when the received power is 50 kW or more is 0 kWh. If the received power is 50 kW or more, it is possible to complete charging of the electric vehicle EV with the received power even if the storage amount SOC of the facility storage battery 10 is 0 kWh. If the storage battery 10 for facilities is stored based on the target storage amount SOCt shown in FIG. 2, the output power Po of 50 kW is continuously supplied to the electric vehicle EV during the charging time Tchg regardless of the received power. be able to.
　また、本実施形態の急速充電器１－１では、目標蓄電量ＳＯＣｔは、電気自動車ＥＶに対する充電を完了可能な最小限の値とされている。従って、商用電源からの受電量を必要最小限に抑えることが可能となる。 Further, in the quick charger 1-1 of the present embodiment, the target charged amount SOCt is set to a minimum value that can complete the charging of the electric vehicle EV. Therefore, the amount of power received from the commercial power source can be minimized.
　図３は、本実施形態の急速充電器１－１の充放電に係るタイムチャートである。図３において、横軸は時間、縦軸は蓄電量ＳＯＣを示す。図３に示すように、時刻ｔ１からｔ２の間（第１回目）、時刻ｔ３からｔ４の間（第２回目）、時刻ｔ５からｔ６の間（第３回目）にそれぞれ電気自動車ＥＶに対する充電が行われる。 FIG. 3 is a time chart relating to charging / discharging of the quick charger 1-1 according to the present embodiment. In FIG. 3, the horizontal axis indicates time, and the vertical axis indicates the storage amount SOC. As shown in FIG. 3, the electric vehicle EV is charged between time t1 and t2 (first time), between time t3 and t4 (second time), and between time t5 and t6 (third time). Done.
　第１回目および第２回目の充電後の蓄電量ＳＯＣは、それぞれ目標蓄電量ＳＯＣｔよりも大きい。従って、充電完了後に設備用蓄電池１０に対する蓄電は行われない。第３回目の充電後の蓄電量ＳＯＣは目標蓄電量ＳＯＣｔを下回っている。これにより、時刻ｔ６から設備用蓄電池１０に対する蓄電が開始される。時刻ｔ７に蓄電量ＳＯＣが目標蓄電量ＳＯＣｔまで回復すると、商用電源からの受電が終了し、設備用蓄電池１０に対する蓄電が終了する。その後は、蓄電量ＳＯＣが目標蓄電量ＳＯＣｔを下回ると、設備用蓄電池１０に対する蓄電がなされる。 The storage amount SOC after the first charge and the second charge is larger than the target storage amount SOCt, respectively. Accordingly, the storage of the facility storage battery 10 is not performed after the charging is completed. The storage amount SOC after the third charge is less than the target storage amount SOCt. Thereby, the electrical storage with respect to the storage battery 10 for facilities is started from the time t6. When the storage amount SOC recovers to the target storage amount SOCt at time t7, the power reception from the commercial power supply is ended, and the storage of the facility storage battery 10 is ended. Thereafter, when the storage amount SOC falls below the target storage amount SOCt, the facility storage battery 10 is charged.
　このように、本実施形態に係る急速充電器１－１によれば、設備用蓄電池１０の蓄電量ＳＯＣを電気自動車ＥＶに対する充電を完了するために必要な最小限としておくことができ、商用電源からの受電量を抑制することが可能となる。 As described above, according to the quick charger 1-1 according to the present embodiment, the storage amount SOC of the facility storage battery 10 can be kept to the minimum necessary for completing the charging of the electric vehicle EV. It is possible to suppress the amount of power received from the.
　なお、本実施形態に係る目標蓄電量ＳＯＣｔの決定方法は、常時行われても、所定の条件が成立する場合に行われるようにしてもよい。例えば、予め定められた所定期間や予め定められた所定時間帯に上記のような目標蓄電量ＳＯＣｔの決定方法が行われてもよい。所定時間帯は、例えば、１日のうちで電力料金の単価が比較的高額な時間帯、例えば昼間時間とすることができる。所定時間帯は、電力需要が大きい時間帯（重負荷時間、ピーク時間）とされてもよい。所定期間は、例えば、夏期とすることができる。 It should be noted that the method for determining the target charged amount SOCt according to the present embodiment may be performed constantly or when a predetermined condition is satisfied. For example, the method for determining the target storage amount SOCt as described above may be performed during a predetermined period or a predetermined time period. The predetermined time zone can be, for example, a time zone in which the unit price of the power rate is relatively high in one day, for example, daytime time. The predetermined time zone may be a time zone (heavy load time, peak time) when power demand is large. The predetermined period can be, for example, summer.
　上記の所定時間帯を除く時間帯の目標蓄電量ＳＯＣｔは、上記所定時間帯の目標蓄電量ＳＯＣｔと異なるようにしてもよい。所定時間帯を除く時間帯の目標蓄電量ＳＯＣｔは、所定時間帯の目標蓄電量ＳＯＣｔ以上であることが望ましく、所定時間帯の目標蓄電量ＳＯＣｔよりも大きな値であることが好ましい。このようにすれば、次の所定時間帯での放電に備えて、所定時間帯を除く時間帯に蓄電量ＳＯＣを十分に回復させておくことができる。 The target power storage amount SOCt during the time period excluding the predetermined time period may be different from the target power storage amount SOCt during the predetermined time period. The target power storage amount SOCt in the time zone excluding the predetermined time zone is desirably equal to or greater than the target power storage amount SOCt in the predetermined time zone, and is preferably larger than the target power storage amount SOCt in the predetermined time zone. In this way, in preparation for the discharge in the next predetermined time zone, the charged amount SOC can be sufficiently recovered in the time zone excluding the predetermined time zone.
　例えば、所定時間帯を除く時間帯には、所定時間帯とは反対に、受電電力が大きい場合の目標蓄電量ＳＯＣｔを受電電力が小さい場合の目標蓄電量ＳＯＣｔよりも大きくするようにしてもよい。この場合に、受電量が０ｋＷであるときの目標蓄電量ＳＯＣｔは、所定時間帯と所定時間帯以外の時間帯とで共通とされてもよい。例えば、所定時間帯の目標蓄電量ＳＯＣｔが図２に示すように定められている場合、所定時間帯以外の時間帯における受電電力が０ｋＷのときの目標蓄電量ＳＯＣｔは２５ｋＷｈとされてもよい。所定時間帯以外の時間帯の目標蓄電量ＳＯＣｔと受電電力との関係は、例えば、線形とすることができる。 For example, in the time zone excluding the predetermined time zone, the target power storage amount SOCt when the received power is large may be made larger than the target power storage amount SOCt when the received power is low, contrary to the predetermined time zone. . In this case, the target power storage amount SOCt when the power reception amount is 0 kW may be common between the predetermined time zone and a time zone other than the predetermined time zone. For example, when the target power storage amount SOCt in a predetermined time zone is determined as shown in FIG. 2, the target power storage amount SOCt when the received power in the time zone other than the predetermined time zone is 0 kW may be 25 kWh. The relationship between the target power storage amount SOCt and the received power in a time zone other than the predetermined time zone can be linear, for example.
　なお、所定時間帯を除く時間帯の目標蓄電量ＳＯＣｔは、一定値とされてもよく、例えば、蓄電量ＳＯＣの最大値（蓄電率１００％）とされてもよい。このようにした場合、次の所定時間帯における放電に備えて設備用蓄電池１０に最大限の蓄電を行っておくことができる。 It should be noted that the target storage amount SOCt in the time period excluding the predetermined time period may be a constant value, for example, the maximum value (storage rate 100%) of the storage amount SOC. In this case, the facility storage battery 10 can be charged to the maximum extent in preparation for discharge in the next predetermined time period.
　図４は、実施形態に係る受電電力と目標蓄電量ＳＯＣｔとの関係を示す他の図である。図４には、設備用蓄電池１０の最大出力が、電気自動車ＥＶに対する最大出力電力Ｐｏｍａｘ未満である場合の受電電力と目標蓄電量ＳＯＣｔとの関係が示されている。目標蓄電量ＳＯＣｔの最大値は、１回の充電時間Ｔchgにおいて設備用蓄電池１０が出力する最大電力量とされている。図４に示す受電電力と目標蓄電量ＳＯＣｔとの関係は、設備用蓄電池１０の最大出力が２５ｋＷ、充電時間Ｔchgが０．５ｈのものであり、目標蓄電量ＳＯＣｔの最大値は、１２．５ｋＷｈである。これは、１回の充電時間（０．５ｈ）において、設備用蓄電池１０が最大出力（２５ｋＷ）で放電し続けた場合に出力する電力量に相当する。言い換えると、目標蓄電量ＳＯＣｔの上限は、設備用蓄電池１０の最大出力と、１回当たりの充電時間Ｔchgとの積に相当する。このように目標蓄電量ＳＯＣｔの最大値を設定することで、設備用蓄電池１０に対して必要以上に蓄電がなされることを抑制し、受電量を抑制することができる。 FIG. 4 is another diagram showing the relationship between the received power and the target charged amount SOCt according to the embodiment. FIG. 4 shows the relationship between the received power and the target charged amount SOCt when the maximum output of the facility storage battery 10 is less than the maximum output power Pomax for the electric vehicle EV. The maximum value of the target storage amount SOCt is the maximum amount of power output from the facility storage battery 10 in one charge time Tchg. The relationship between the received power and the target storage amount SOCt shown in FIG. 4 is that the maximum output of the facility storage battery 10 is 25 kW and the charging time Tchg is 0.5 h, and the maximum value of the target storage amount SOCt is 12.5 kWh. It is. This corresponds to the amount of electric power that is output when the storage battery 10 for facilities continues to be discharged at the maximum output (25 kW) in one charging time (0.5 h). In other words, the upper limit of the target storage amount SOCt corresponds to the product of the maximum output of the facility storage battery 10 and the charging time Tchg per time. By setting the maximum value of the target power storage amount SOCt in this way, it is possible to suppress power storage more than necessary for the facility storage battery 10 and to suppress the power reception amount.
　２５ｋＷ以下の受電電力の領域では、目標蓄電量ＳＯＣｔが最大値の２５ｋＷｈで一定である。一方、２５ｋＷよりも大きい受電電力の領域では、目標蓄電量ＳＯＣｔは、可変である。２５ｋＷよりも受電電力が大きい場合、受電電力が小さい場合の目標蓄電量ＳＯＣｔは、受電電力が大きい場合の目標蓄電量ＳＯＣｔよりも大きい。本実施形態では、２５ｋＷよりも大きい受電電力の領域では、受電電力と目標蓄電量ＳＯＣｔとの関係が線形である。 In the region of the received power of 25 kW or less, the target storage amount SOCt is constant at the maximum value of 25 kWh. On the other hand, in the region of received power greater than 25 kW, the target charged amount SOCt is variable. When the received power is larger than 25 kW, the target charged amount SOCt when the received power is small is larger than the target charged amount SOCt when the received power is large. In the present embodiment, the relationship between the received power and the target charged amount SOCt is linear in the received power region greater than 25 kW.
　なお、本実施形態では、設備用蓄電池１０に蓄電する場合に、蓄電量ＳＯＣが目標蓄電量ＳＯＣｔに達したら蓄電を停止することとしたが、太陽光発電装置１２からの入力電力Ｐｇによる蓄電はこれとは別に行われてもよい。すなわち、目標蓄電量ＳＯＣｔは、商用電源からの受電によって設備用蓄電池１０に対する蓄電を行う場合の蓄電量ＳＯＣの上限とすることができる。太陽光発電装置１２からの入力電力Ｐｇによる蓄電は、目標蓄電量ＳＯＣｔにかかわらず実行されてもよく、例えば、最大の蓄電量ＳＯＣまで入力電力Ｐｇによって蓄電がなされてもよい。 In this embodiment, when storing in the facility storage battery 10, the storage is stopped when the storage amount SOC reaches the target storage amount SOCt. However, the storage using the input power Pg from the solar power generation device 12 is not performed. It may be performed separately. That is, the target storage amount SOCt can be the upper limit of the storage amount SOC when the facility storage battery 10 is stored by receiving power from a commercial power source. Power storage using the input power Pg from the solar power generation device 12 may be executed regardless of the target power storage amount SOCt. For example, power may be stored using the input power Pg up to the maximum power storage amount SOC.
［実施形態の第１変形例］
　実施形態の第１変形例について説明する。受電電力に応じて目標蓄電量ＳＯＣｔが変化する場合の受電電力と目標蓄電量ＳＯＣｔとの関係は、線形には限定されない。目標蓄電量ＳＯＣｔは、例えば、受電電力の変化に対して階段状に変化してもよい。例えば、受電電力が一定量増加する毎に目標蓄電量ＳＯＣｔが一定量減少するようにしてもよい。 [First Modification of Embodiment]
A first modification of the embodiment will be described. The relationship between the received power and the target charged amount SOCt when the target charged amount SOCt changes according to the received power is not limited to linear. For example, the target storage amount SOCt may change stepwise with respect to a change in received power. For example, the target power storage amount SOCt may be decreased by a certain amount every time the received power increases by a certain amount.
［実施形態の第２変形例］
　実施形態の第２変形例について説明する。図５は、実施形態の第２変形例に係る受電電力と目標蓄電量ＳＯＣｔとの関係を示す図である。図５では、白丸（○）によって目標蓄電量ＳＯＣｔが示されている。図５に示す実線は、受電電力が一定である場合に電気自動車ＥＶに対する充電を完了するために最低限必要とされる蓄電量ＳＯＣである。本変形例では、許容最大電力の変動に備えて、最低限必要とされる蓄電量ＳＯＣに所定のマージン（以下、「加算量ΔＳ」と称する。）が加算されて目標蓄電量ＳＯＣｔが定められている。 [Second Modification of Embodiment]
A second modification of the embodiment will be described. FIG. 5 is a diagram illustrating a relationship between the received power and the target charged amount SOCt according to the second modification of the embodiment. In FIG. 5, the target charged amount SOCt is indicated by a white circle (◯). The solid line shown in FIG. 5 is the minimum storage amount SOC required to complete the charging of the electric vehicle EV when the received power is constant. In the present modification, a predetermined margin (hereinafter referred to as “addition amount ΔS”) is added to the minimum required storage amount SOC in preparation for fluctuations in the maximum allowable power to determine the target storage amount SOCt. ing.
　デマンドコントローラ１５から出力される許容最大電力は、検出された受電量に応じて変動し得る。許容最大電力が低減された場合であっても、１回の充電時間Ｔchgで電気自動車ＥＶに対する充電を完了できることが好ましい。本変形例では、目標蓄電量ＳＯＣｔは、加算量ΔＳを含んでいる。これにより、デマンドコントローラ１５から出力される許容最大電力が低下した場合に、電気自動車ＥＶに対する出力電力Ｐｏが不足する可能性を低減できる。 The allowable maximum power output from the demand controller 15 can fluctuate according to the detected amount of power received. Even when the allowable maximum power is reduced, it is preferable that the charging of the electric vehicle EV can be completed in one charging time Tchg. In the present modification, the target power storage amount SOCt includes the addition amount ΔS. Thereby, when the permissible maximum power output from the demand controller 15 decreases, the possibility that the output power Po for the electric vehicle EV is insufficient can be reduced.
　加算量ΔＳは、一定値とされても、受電電力に応じて可変とされてもよい。加算量ΔＳは、例えば、現在の受電電力から決まる最低限必要な蓄電量ＳＯＣ（図５の直線上の値）に対して所定の割合（例えば、５％や１０％）の値とされてもよい。受電電力が大きい場合の加算量ΔＳは、受電電力が小さい場合の加算量ΔＳよりも小さくされてもよい。 The addition amount ΔS may be a constant value or may be variable according to the received power. The addition amount ΔS may be a predetermined ratio (for example, 5% or 10%) with respect to the minimum required storage amount SOC (value on the straight line in FIG. 5) determined from the current received power, for example. Good. The addition amount ΔS when the received power is large may be smaller than the addition amount ΔS when the received power is small.
　加算量ΔＳは、デマンドコントローラ１５が許容最大電力を変化させるときの１回当たりの変更ピッチ（変更幅）に基づいて決定されてもよい。加算量ΔＳは、例えば、変更ピッチ分だけ許容最大電力が低下した場合であっても充電時間Ｔchg内に電気自動車ＥＶに対する充電を完了することが可能となるように定められる。許容最大電力の１回当たりの変更ピッチをΔＰｉとすると、加算量ΔＳは、例えば下記式（１）で算出される。
　ΔＳ＝Ｔchg×ΔＰｉ…（１） The addition amount ΔS may be determined based on a change pitch (change width) per time when the demand controller 15 changes the allowable maximum power. For example, the amount of addition ΔS is determined so that charging of the electric vehicle EV can be completed within the charging time Tchg even when the allowable maximum power is reduced by the change pitch. Assuming that the change pitch per allowable maximum power is ΔPi, the addition amount ΔS is calculated by the following equation (1), for example.
ΔS = Tchg × ΔPi (1)
　本変形例によれば、目標蓄電量ＳＯＣｔが加算量ΔＳを含んでいることにより、電気自動車ＥＶに対する充電時の出力電力Ｐｏの不足が抑制される。例えば、電気自動車ＥＶに対する充電中に許容最大電力が低下した場合であっても充電を完了させることが可能となる。 According to this modification, the shortage of the output power Po when charging the electric vehicle EV is suppressed because the target charged amount SOCt includes the added amount ΔS. For example, charging can be completed even when the allowable maximum power is reduced during charging of the electric vehicle EV.
　なお、デマンドコントローラ１５が許容最大電力を変化させる時間間隔は、充電時間Ｔchg以上であることが好ましい。このようにすれば、電気自動車ＥＶに対する充電中に許容最大電力が変化するとしても、その回数は多くとも１回である。従って、許容最大電力の低下に備えて最低限必要な蓄電量ＳＯＣを確保しておくことができ、かつ設備用蓄電池１０に過大に蓄電してしまい受電量が増加することを抑制することができる。 Note that the time interval at which the demand controller 15 changes the allowable maximum power is preferably equal to or longer than the charging time Tchg. In this way, even if the allowable maximum power changes during charging of the electric vehicle EV, the number of times is at most one. Therefore, it is possible to secure a minimum required storage amount SOC in preparation for a decrease in the allowable maximum power, and to suppress an excessive storage in the facility storage battery 10 and an increase in the amount of received power. .
［実施形態の第３変形例］
　実施形態の第３変形例について説明する。上記実施形態では、急速充電器１－１による充電の対象が電気自動車ＥＶであったが、これに限らず、他の外部の装置に対して充電がなされてもよい。また、急速充電器１－１は、太陽光発電装置１２のような外部の発電装置から受電しないものであってもよい。急速充電器１－１は、太陽光発電装置１２以外の発電装置、例えば風力発電装置から受電してもよい。 [Third Modification of Embodiment]
A third modification of the embodiment will be described. In the above embodiment, the target of charging by the quick charger 1-1 is the electric vehicle EV. However, the present invention is not limited to this, and other external devices may be charged. Further, the quick charger 1-1 may be one that does not receive power from an external power generator such as the solar power generator 12. The quick charger 1-1 may receive power from a power generation device other than the solar power generation device 12, for example, a wind power generation device.
　上記の実施形態および変形例に開示された内容は、適宜組み合わせて実行されることができる。 The contents disclosed in the above embodiments and modifications can be executed in appropriate combination.
　１－１　急速充電器
　１　商用電源ライン
　２　分電盤
　３　店舗用電源ライン
　４　充電器用電源ライン
　６　ＡＣ／ＤＣコンバータ（受電手段）
　７　第一ＤＣ／ＤＣコンバータ（出力手段）
　９　第二ＤＣ／ＤＣコンバータ
　１０　設備用蓄電池（蓄電池）
　１１　出力ライン
　１５　デマンドコントローラ
　２０　制御装置
　Ｐｑｃ　授受電力
　Ｐｇ　入力電力
　Ｐｂ　放電電力
　Ｐｏ　出力電力
　Ｔchg　充電時間
　ΔＳ　加算量 1-1 Quick charger 1 Commercial power line 2 Distribution board 3 Store power line 4 Charger power line 6 AC / DC converter (power receiving means)
7 First DC / DC converter (output means)
9 Second DC / DC converter 10 Equipment storage battery (storage battery)
11 Output line 15 Demand controller 20 Control device Pqc Transfer power Pg Input power Pb Discharge power Po Output power Tchg Charging time ΔS Addition amount

Claims (5)

  1. 　商用電源と接続された受電手段と、
    　前記受電手段と接続された蓄電池と、
    　前記受電手段および前記蓄電池と接続され、外部の装置に対する充電用の電力を出力する出力手段と、
    　を備え、
    　前記蓄電池の蓄電量の目標値が、前記受電手段を介して受電する電力に応じて変化する
    　ことを特徴とする急速充電器。     Power receiving means connected to a commercial power source;
    A storage battery connected to the power receiving means;
    Output means connected to the power receiving means and the storage battery, and for outputting electric power for charging to an external device;
    With
    The quick charger, wherein the target value of the amount of electricity stored in the storage battery changes according to the electric power received through the power receiving means.
  2. 　前記受電手段を介して受電する電力が小さい場合の前記蓄電量の目標値は、前記受電手段を介して受電する電力が大きい場合の前記蓄電量の目標値よりも大きい
    　請求項１に記載の急速充電器。     The target value of the amount of electricity stored when the power received through the power receiving unit is small is larger than the target value of the amount of electricity stored when the power received through the power receiving unit is large. Charger.
  3. 　前記蓄電量の目標値は、前記外部の装置に対する１回当たりの充電時間と、前記外部の装置に対して出力する最大電力と、前記受電手段を介して受電する電力とに基づく
    　請求項１に記載の急速充電器。     The target value of the amount of power storage is based on a charging time per time for the external device, a maximum power output to the external device, and a power received via the power receiving means. The described quick charger.
  4. 　前記蓄電量の目標値の上限は、前記蓄電池の最大出力と前記１回当たりの充電時間との積に相当する
    　請求項３に記載の急速充電器。     The quick charger according to claim 3, wherein an upper limit of the target value of the storage amount corresponds to a product of a maximum output of the storage battery and the charging time per time.
  5. 　前記受電手段を介して受電する電力は、外部からの指令値に基づいており、
    　前記蓄電量の目標値は、更に、前記外部からの指令値の１回当たりの変更幅に基づく
    　請求項１に記載の急速充電器。     The power received through the power receiving means is based on an external command value,
    The quick charger according to claim 1, wherein the target value of the charged amount is further based on a change width per one time of the command value from the outside.
PCT/JP2012/082841 2012-12-18 2012-12-18 Rapid charger WO2014097409A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007535282A (en) * 2003-07-10 2007-11-29 エアロヴァイロンメント インコーポレイテッド Battery charging system and method
JP2009105998A (en) * 2007-10-19 2009-05-14 Sumitomo Electric Ind Ltd Electrical storage device
JP2011200104A (en) * 2010-01-08 2011-10-06 Jfe Engineering Corp Quick charging system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007535282A (en) * 2003-07-10 2007-11-29 エアロヴァイロンメント インコーポレイテッド Battery charging system and method
JP2009105998A (en) * 2007-10-19 2009-05-14 Sumitomo Electric Ind Ltd Electrical storage device
JP2011200104A (en) * 2010-01-08 2011-10-06 Jfe Engineering Corp Quick charging system

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