WO2014068732A1 - Quick charger - Google Patents

Abstract

This quick charger (1-1) comprises: a first power receiving means (6) that receives power from a commercial power supply; a second power receiving means (8) that is connected to the first power receiving means and that receives power from a power supply other than the commercial power supply; and a storage battery (10) that is connected to the first power receiving means and the second power receiving means. The quick charger has the function of charging an external device (EV). The maximum input power from the first power receiving means is preferably less than 50% of the maximum output power to the external device. The second power receiving means preferably receives power from a solar power generation device.

Description

Quick charger

The present invention relates to a quick charger.

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.

JP 2011-130593 A

In a quick charger having a power receiving means for receiving power from a commercial power source, it is desired that received power can be reduced.

An object of the present invention is to provide a quick charger that can reduce power received from a commercial power source.

The quick charger according to the present invention includes a first power receiving unit that receives power from a commercial power source, a second power receiving unit that is connected to the first power receiving unit and receives power from a power source other than the commercial power source, and the first power receiving unit. And a storage battery connected to the second power receiving means, and has a function of charging an external device.

In the above quick charger, the maximum input power by the first power receiving means is preferably less than 50% of the maximum output power to the external device.

In the quick charger, tmax is a maximum charging time for the external device, Pb is the output power of the storage battery, Qb is the effective capacity of the storage battery, Pomax is the maximum output power, and Pb> 0.5 × It is preferable that Pomax and Qb> 0.5 × Pomax × tmax.

In the quick charger, when charging the external device, power corresponding to 50% of the maximum output power for the external device is output from the storage battery, and the power output from the storage battery and the second power receiving means It is preferable that the first power receiving unit receives power that is insufficient with the first power.

In the quick charger, the second power receiving means preferably receives power from a solar power generation device.

It is preferable that the quick charger further includes a power converter connected to the storage battery, and the solar power generation device is connected to the storage battery side of the power converter.

In the quick charger, the second power receiving means preferably receives power from a wind power generator.

In the above quick charger, the second power receiving means preferably receives power from a power storage facility.

In the quick charger, it is preferable that the charging of the external device is stopped when the remaining power of the storage battery decreases and a predetermined output cannot be obtained.

The quick charger further includes a notification unit, and when charging the external device is started, the quick charger is more than a value corresponding to a product of 50% of the maximum output power for the external device and a maximum charging time. When the remaining amount of electricity stored in the storage battery is small, it is preferable to notify the user that charging may stop in the middle by the notification means.

In the quick charger, when charging of the external device is started, the sum of the output power determined by the remaining storage amount and the maximum charging time of the storage battery and the set value of the received power by the first power receiving means Is preferably the maximum charging power for the external device.

The quick charger further includes a notification unit, and when charging the external device is started, the quick charger is more than a value corresponding to a product of 50% of the maximum output power for the external device and a maximum charging time. When the remaining power of the storage battery is small, it is preferable to notify the user of a delay in starting charging by the notification means.

The quick charger according to the present invention includes a first power receiving unit that receives power from a commercial power source, a second power receiving unit that is connected to the first power receiving unit and receives power from a power source other than the commercial power source, and a first power receiving unit. And a storage battery connected to the second power receiving means, and has a function of charging an external device. According to the quick charger according to the present invention, it is possible to reduce the received power from the commercial power source.

FIG. 1 is a schematic configuration diagram of a quick charger according to the first embodiment. FIG. 2 is a flowchart showing the operation of the quick charger according to the first embodiment. FIG. 3 is an operation explanatory diagram when the facility storage battery is fully charged. FIG. 4 is an explanatory diagram of power storage for the facility storage battery. FIG. 5 is an explanatory diagram of power storage for a storage battery for facilities using input power from the solar power generation device. FIG. 6 is an explanatory diagram of reverse power transmission to the store side. FIG. 7 is a schematic configuration diagram of a quick charger according to the second embodiment.

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.

[First Embodiment]
The first embodiment will be described with reference to FIGS. 1 to 6. The present embodiment relates to a quick charger. FIG. 1 is a schematic configuration diagram of a quick charger according to the first embodiment of the present invention, and FIG. 2 is a flowchart showing an operation of the quick charger according to the first embodiment.

The quick charger 1-1 shown in FIG. 1 has a function of charging an external device. 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 controller 8, a second DC / DC converter 9, and a storage battery for equipment. 10, an output line 11, a notification means 15, and a control device 20.

The distribution board 2 is connected to a commercial power line 1, a store power line 3 and a charger power line 4. The quick charger 1-1 is connected to the commercial power line 1 and the store power line 3 via the charger power line 4 and the distribution board 2, respectively. The store power line 3 supplies power to a store such as a convenience store. The bus 5 is connected to the charger power line 4 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). 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.

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. In this embodiment, since the facility storage battery 10 having a total capacity of 20 kWh is used in the range of 10 to 90% of the total capacity, the effective capacity Qb is 16 kWh.

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 electrical storage remaining 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 controller 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 controller 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 controller 8.

The power controller 8 increases the output voltage to the bus 5 higher than the voltage of the facility storage battery 10 in the control of the input power P2 input to the bus 5 from the solar power generation device 12. When the input power P2 becomes equal to the generated power of the solar power generation device 12, the balance is automatically made. The power controller 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 notification means 15 is a device that notifies the user of the quick charger 1-1. The notification means 15 of this embodiment notifies the user of information by displaying visual information such as characters and graphics on the display screen. Note that the notification means 15 may notify information by sound or light instead of or in addition to characters or graphics.

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, the power controller 8, and the notification means 15, respectively. The AC / DC converter 6, the first DC / DC converter 7, the second DC / DC converter 9, the facility storage battery 10, the power controller 8 and the notification means 15 are controlled. Further, the control device 20 has a function of acquiring the power consumption of the electric load connected to the store power line 3 through communication or the like.

The facility storage battery 10 has a monitoring device that monitors the temperature and voltage of the facility storage battery 10, the remaining power SOC (%), 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 remaining power SOC is calculated in the range of the effective capacity Qb. For example, when charge / discharge control is performed within a range of 10% to 90% of the total capacity of the storage battery 10 for equipment, the remaining amount of 10% of the total capacity is 0% of the remaining power storage SOC, and 90% of the total capacity. % Remaining is 100% of the remaining power storage SOC.

The control device 20 determines received power P1 (kW) received from the charger power supply line 4 via the AC / DC converter 6, and outputs voltage and current command values to be output to the bus 5 based on the received power P1. To do. The AC / DC converter 6 controls the voltage and current output to the bus 5 based on the command value received from the control device 20.

Further, the control device 20 sets the charging 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 charging power Po, is 50 kW, but 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, from the power controller 8, input power P <b> 2 (voltage and current) generated by the solar power generation device 12 and input to the bus 5. The control device 20 can instruct the power controller 8 to shut off the solar power generation device 12 and the bus 5 and set the input power P2 to zero.

The control device 20 determines the output 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 output power Pb, or outputs from the bus 5 to the facility storage battery 10. The voltage and current command values to be output 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 quick charger 1-1 according to the present embodiment receives a first power receiving means (AC / DC converter 6) that receives power from the commercial power line 1, and a first power receiving device 12 that is a power source other than the commercial power source. 2 power receiving means (power controller 8) and a storage battery 10 for equipment. Thereby, the amount of power received from the commercial power source can be suppressed. The output of the solar power generation device 12 that is relatively likely to fluctuate can be supplemented by receiving power from a stable commercial power source, and the electric vehicle EV can be stably charged. In addition, the quick charger 1-1 has the storage battery 10 for the facility, so that the fluctuation of the output of the photovoltaic power generation device 12 is absorbed by the charging / discharging of the storage battery 10 for the facility, and the output to the electric vehicle EV is further stabilized. Can do.

The operation of the quick charger 1-1 according to this embodiment will be described with reference to FIG. The control flow shown in FIG. 2 is repeatedly executed at a predetermined interval, for example. In step S1, the control device 20 determines whether or not there is EV charging. The control device 20 determines whether or not there is a charge request from the electric vehicle EV connected to the output line 11. As a result of the determination in step S1, if it is determined that there is EV charging (step S1-Y), the process proceeds to step S2, and if not (step S1-N), the process proceeds to step S3.

In step S2, the control device 20 performs first storage battery output control. In the first storage battery output control, the command value of the output power Pb of the facility storage battery 10 is calculated by the following equation (1).
Pb = SOC / tch (1)
Here, tch is a charging time setting value. The charging time set value tch is set to a time shorter than the maximum charging time tmax. The maximum charging time tmax is a maximum value of one charging time for the electric vehicle EV, and can be set to, for example, 30 minutes or 1 hour. The output power Pb is a value that exceeds 50% of the maximum output power Pomax. When the output power Pb calculated by the above equation (1) is 50% or less of the maximum output power Pomax, the command value of the output power Pb is a value exceeding 50% of the maximum output power Pomax.

The charging power Po is a predetermined set value or a required value from the electric vehicle EV, and is 50 kW, for example. The received power P1 is calculated by the following equation (2).
P1 = Po-Pb-P2 (2)
In the above formula (2), the input power P2 is obtained by multiplying the average power input from the solar power generation device 12 in the past certain time by the coefficient k1. The coefficient k1 is a value smaller than 1, and is determined in consideration of, for example, fluctuations in the output of the solar power generation device 12. Note that the input power P2 may be a value obtained by multiplying the average power by time for a certain period in the past by a coefficient k1. That is, the input power P2 based on the past average power in the time zone including the current time may be used in the above equation (2).

The received power P1 is further determined so as to satisfy the following formula (3).
P1 <0.5 × Pomax (3)
When the received power P1 calculated by the above formula (2) is 50% or more of the maximum output power Pomax, the command value of the received power P1 is a value within a range where the above formula (3) is satisfied, for example, the above formula ( It is set to a predetermined maximum value within the range in which 3) holds.

The control device 20 sends the calculated command value of the received power P1 to the AC / DC converter 6, the command value of the charging power Po to the first DC / DC converter 7, and the command value of the output power Pb to the second DC / DC converter. Output to 9 respectively. When step S2 is executed, this control flow ends.

In step S3, the control device 20 performs second storage battery output control. In the second storage battery output control, the command value of the output power Pb of the facility storage battery 10 is calculated by the following equation (4).
Pb = − (P1 + P2) (4)
That is, in the second storage battery output control, the facility storage battery 10 is charged with the received power P1 and the input power P2 from the solar power generation device 12. The input power P2 in the above equation (4) is calculated in the same manner as the input power P2 in the first storage battery output control in step S2. The facility storage battery 10 has an allowable maximum stored power Pinmax, which is the maximum power allowed for power storage. When the magnitude of the output power Pb calculated by the above equation (4) exceeds the allowable maximum stored power Pinmax, the magnitude of the command value of the output power Pb is limited to the allowable maximum stored power Pinmax or less. The allowable maximum stored power Pinmax is based on, for example, 1.5 times the number of the capacity of the facility storage battery 10. For example, when the total capacity is 20 kWh, 20 × 1.5 = 30, and the allowable maximum stored power Pinmax of the present embodiment is a value in the vicinity of 30 kW.

Further, the received power P1 of the above formula (4) is calculated by the following formula (5).
P1 = 0.5 × Pomax−P2 (5)
The command value of the received power P1 is a value less than 50% of the maximum output power Pomax. Further, when the sum of the received power P1 and the input power P2 exceeds the allowable maximum stored power Pinmax, the received power P1 is reduced so that the following formula (6) is satisfied.
P1 + P2 ≦ Pinmax (6)
The control device 20 outputs the calculated command value of the received power P1 to the AC / DC converter 6 and the command value of the output power Pb to the second DC / DC converter 9, respectively. When step S3 is executed, the control flow ends.

As described above, in the quick charger 1-1 according to the present embodiment, the maximum input power P1max, which is the maximum value of the received power P1 from the commercial power line 1, is less than 50% of the maximum output power Pomax. Thereby, the amount of power received from the commercial power source can be suppressed. For example, when the contract power is 50 kW and the maximum output power Pomax is 50 kW, two quick chargers 1-1 are installed, and two quick chargers 1-1 are simultaneously connected within the contract power range. The vehicle EV can be charged. By appropriately determining the maximum input power P1max, the number of quick chargers 1-1 that can simultaneously charge the electric vehicle EV can be increased. For example, when three quick chargers are installed and three electric vehicles EV can be charged simultaneously, the maximum input power P1max may be less than 1/3 of the maximum output power Pomax.

In the quick charger 1-1 according to the present embodiment, the effective capacity Qb of the facility storage battery 10 is determined so that the following formula (7) is established.
Qb> 0.5 × Pomax × tmax (7)
Therefore, the storage battery 10 for facilities has the capacity | capacitance which can continue outputting the electric power exceeding 50% of the maximum output electric power Pomax at the time of one charge with respect to the electric vehicle EV. In step S2, the output power Pb of the facility storage battery 10 is desirably a value that satisfies the following equation (8).
Qb> Pb × tmax> 0.5 × Pomax × tmax (8)

The above equation (8) indicates that power corresponding to 50% of the maximum output power Pomax is output from the storage battery 10 for facilities when charging the electric vehicle EV. Further, the above formula (2) indicates that the first power receiving means receives power that is insufficient between the power (Pb) output from the facility storage battery 10 and the power (P2) from the second power receiving means. Yes. Thereby, the maximum input power P1max by the first power receiving means is less than 50% of the maximum output power Pomax. In the present embodiment, the maximum input power P1max is 24.5 kW, and the output power Pb of the facility storage battery 10 is 30.5 kW (efficiency 90%).

FIG. 3 is an operation explanatory diagram when the facility storage battery 10 is fully charged. The quick charger 1-1 according to the present embodiment is a solar power generation device when the facility storage battery 10 is fully charged (for example, the remaining power SOC is 100%) and the electric vehicle EV is not charged. 12 is supplied to the store power line 3. The quick charger 1-1 controls the input power P2 so as not to generate a reverse power flow to the commercial power supply line 1.

The control device 20 controls the input power P2 from the solar power generation device 12 with, for example, steady power consumption in the store as an upper limit. For example, when the store has a constant power consumption of 10 kW, the upper limit of the input power P2 is 10 kW. The control device 20 may use the actual power consumption in the store as the upper limit of the input power P2 from the solar power generation device 12.

The quick charger 1-1 can cope with the output power Pb of the storage battery 10 for facilities when receiving power from the commercial power supply line 1 is restricted when charging the electric vehicle EV. For example, when the power consumption in the store increases and the received power P1 determined in step S2 cannot be received, the command value of the output power Pb calculated by the following equation (9) is sent to the second DC / DC converter 9. Is output.
Pb = Po-P1-P2 (9)
Thereby, the amount of power received from the commercial power source combining the quick charger 1-1 and the store can be suppressed.

The quick charger 1-1 stores power in the facility storage battery 10 when surplus power is generated when charging the electric vehicle EV. FIG. 4 is an explanatory diagram of power storage for the facility storage battery 10. For example, when charging the electric vehicle EV, the quick charger 1-1 has a case where the sum of the maximum input power P1max and the input power P2 from the solar power generation device 12 is larger than the charging power Po, that is, When (10) holds, the storage battery 10 is charged.
Po <P1max + P2 (10)
When the power consumption of the store is large and the maximum input power P1max cannot be received, the maximum received power P1 that can be received within the contract power range is used in place of the maximum input power P1max in the above formula (10). It is done.

When power is stored in the facility storage battery 10 during charging of the electric vehicle EV, the stored power Pbin is calculated by the following equation (11).
Pbin = (P1 + P2) −Po (11)
The received power P1 is adjusted so that the stored power Pbin is equal to or lower than the allowable maximum stored power Pinmax.

When the charging power Po is less than the input power P2 from the solar power generation device 12, the quick charger 1-1 stores the storage battery 10 for facilities. FIG. 5 is an explanatory diagram of power storage for the facility storage battery 10 by the input power P <b> 2 from the solar power generation device 12. The control device 20 stores the facility storage battery 10 using the input power P <b> 2 from the solar power generation device 12. The stored power Pbin is calculated by the following formula (12).
Pbin = P2-Po (12)

Furthermore, when surplus power is generated even when the stored power Pbin is set to the allowable maximum stored power Pinmax when charging the electric vehicle EV, the surplus power is output to the store power line 3. Output power (reverse transmission power) P1out from the AC / DC converter 6 to the store side is calculated by the following equation (13).
P1out = P2- (Po + Pinmax) (13)
At this time, the input power P2 from the solar power generation device 12 is limited so that the reverse transmission power P1out does not exceed the power consumption in the store.

The quick charger 1-1 performs reverse power transmission to the store power line 3 when the power consumption of the store exceeds the contract power. FIG. 6 is an explanatory diagram of reverse power transmission to the store side. The control device 20 outputs power from the storage battery 10 for equipment so that the following formula (14) is established.
P1out + Po = P2 + Pb (14)
The reverse transmission power P1out is a difference between the power consumption of the store and the contract power. However, the reverse transmission power P1out is limited if the reverse transmission power P1out is not sufficient for the difference between the power consumption of the store and the contract power even if the output power Pb of the facility storage battery 10 is the maximum allowable value Pbmax.

The quick charger 1-1 may stop charging the electric vehicle EV when the remaining charge SOC of the facility storage battery 10 decreases during charging of the electric vehicle EV and a predetermined output cannot be obtained. Good. For example, charging may be stopped when the output power Pb that satisfies the following formula (15) cannot be output from the storage battery 10 for facilities.
Pb = Po−P1max−P2 (15)

The quick charger 1-1 may notify the user that charging may stop in the middle when the remaining power SOC is insufficient. For example, when charging of the electric vehicle EV is started, if the remaining amount of storage SOC is less than a value corresponding to the product of 50% of the maximum output power Pomax and the maximum charging time tmax, the user is being charged Inform them that there is a possibility of stopping at. As an example, a message “Automatic stop when the remaining battery level decreases during charging” is displayed on the display screen of the notification means 15.

In addition, when the remaining power SOC is insufficient, the quick charger 1-1 starts charging the electric vehicle EV after the remaining power SOC is sufficiently recovered, and delays the charging start to the user. You may make it notify (waiting time). For example, when the remaining power SOC is less than the value corresponding to the product of 50% of the maximum output power Pomax and the maximum charging time tmax, the time required for the remaining power SOC to recover to the value corresponding to the product is calculated. Predict and display this required time on the display screen of the notification means 15. As an example, a message “Please wait for (after the start of charging) and ○ minutes” is displayed on the display screen.

The quick charger 1-1 may determine the maximum charging power Polim for the electric vehicle EV based on the remaining amount of stored power when the remaining amount of stored SOC is not sufficient. The maximum charging power Polim is calculated by the following equation (16). That is, when the quick charger 1-1 starts charging the electric vehicle EV, the set value of the output power Pb determined by the remaining power storage SOC and the maximum charging time tmax and the received power P1 by the first power receiving means. Is the maximum charging power Polim for the electric vehicle EV. In the following formula (16), the received power P1 may be the maximum input power P1max.
Polim = P1 + SOC / tmax (16)

The quick charger 1-1 preferably informs the user of the maximum charging power Polim. For example, a message “currently operating as a kW charger” is displayed on the display screen of the notification means 15. Further, the quick charger 1-1 can communicate the maximum amperage that can be output to the electric vehicle EV based on the maximum charging power Polim.

In the present embodiment, the external device to be charged is the electric vehicle EV, but is not limited to this. The quick charger 1-1 may charge a device other than the electric vehicle EV. Moreover, in this embodiment, although the storage battery 10 for facilities was connected to the bus | bath 5 via the 2nd DC / DC converter 9, the storage battery 10 for facilities is a power converter, such as the 2nd DC / DC converter 9. It may be connected to the bus 5 without being interposed.

[First Modification of First Embodiment]
In the first embodiment, the second power receiving means receives power from the solar power generation device 12, but instead of this, may receive power from the wind power generation device. The second power receiving unit may receive power from the power storage facility. The power storage facility is, for example, a storage battery installed outside the quick charger 1-1 or a storage battery 10 for other quick charger 1-1.

[Second Modification of First Embodiment]
The quick charger 1-1 may have a function as an emergency power source. For example, the quick charger 1-1 may supply power to an electrical device in a store instead of a commercial power source at the time of a power failure. In this case, the quick charger 1-1 is operated independently by the power of the facility storage battery 10 and the input power P2 from the solar power generator 12 and the output power Pb of the facility storage battery 10 are passed through the AC / DC converter 6. To the store power line 3. When the remaining power storage SOC is equal to or less than the threshold value, the operation of the quick charger 1-1 is prohibited in order to suppress overdischarge.

[Third Modification of First Embodiment]
In the first embodiment, the quick charger 1-1 has the power controller 8. However, the power controller 8 may be provided outside the quick charger 1-1. In this case, it is preferable to provide a controller that is communicably connected to each of the quick charger 1-1 and the power controller 8. The controller includes a quick charger 1-1, a charging power Po for the electric vehicle EV, an output power Pb (voltage and current) of the storage battery 10 for the facility, an input power P2 (voltage and current) from the solar power generation device 12, The power (voltage and current) of the AC / DC converter 6, the remaining power SOC (converted to kWh), the chargeable / dischargeable power (current limit value) of the storage battery 10 for equipment, and the like are acquired by communication. Further, the controller communicates with the power controller 8 the conversion power command (voltage, current, power upper limit command) of the power controller 8, the power command (voltage, current, power upper limit command) of the AC / DC converter 6 and the like. Output.

[Fourth Modification of First Embodiment]
In the quick charger 1-1 of the first embodiment, the second power receiving unit that receives power from the solar power generation device 12 may be omitted. The quick charger 1-1 having the facility storage battery 10 has an effect of reducing the received power from the commercial power source.

[Second Embodiment]
A second embodiment will be described with reference to FIG. In the second embodiment, components having the same functions as those described in the first embodiment are given the same reference numerals, and duplicate descriptions are omitted. FIG. 7 is a schematic configuration diagram of a quick charger according to the second embodiment. The quick charger 1-2 according to the present embodiment is different from the quick charger 1-1 of the first embodiment in that the solar power generator 12 is connected to the facility storage battery 10 without going through the power converter. It is a point that has been.

As shown in FIG. 7, the connection line 14 of the solar power generation device 12 is connected to a line that connects the storage battery 10 for equipment and the second DC / DC converter 9. A connection box 13 is disposed on the connection line 14. The connection box 13 includes a contactor and a controller, and cuts off or connects the solar power generation device 12 and the quick charger 1-2. The junction box 13 does not have a power converter. The connection box 13 shuts off the photovoltaic power generator 12 and the quick charger 1-2 when an overcurrent flows through the connection line 14 or when the voltage of the facility storage battery 10 is too high. For example, the connection box 13 disconnects the solar power generator 12 and the quick charger 1-2 at a voltage when the remaining storage SOC of the facility storage battery 10 is 100%.

Unlike the first embodiment, since the power controller 8 is not provided, the power controller 8 cannot narrow down the output of the solar power generation device 12. However, when the input power P2 from the solar power generation device 12 is unnecessary, the solar power generation device 12 is disconnected by the connection box 13 if the storage battery 10 for facilities is fully charged. Therefore, the quick charger 1-2 can exhibit the same function as the quick charger 1-1 of the first embodiment.

In each of the above-described embodiments and modifications, a plurality of quick chargers 1-1 and 1-2 may be installed in one store. When a plurality of quick chargers 1-1 and 1-2 are installed, it is preferable that the charging loads of the quick chargers 1-1 and 1-2 in a predetermined period, for example, one day be equal. For example, the users of the quick chargers 1-1 and 1-2 having a large remaining power SOC of the facility storage battery 10 than the quick chargers 1-1 and 1-2 of the facility storage battery 10 having a small remaining power SOC. The quick chargers 1-1 and 1-2 may perform display or the like so that is preferentially induced.

The contents disclosed in the above embodiments and modifications can be executed in appropriate combination.

1-1 Quick Charger 1 Commercial Power Supply Line 5 Bus 6 AC / DC Converter 7 First DC / DC Converter 8 Power Controller 9 Second DC / DC Converter 10 Storage Battery 12 Solar Power Generator 20 Controller P1 Received Power P1max Maximum input power P2 Input power Pb Output power Po Charging power Pomax Maximum output power Qb Effective capacity tmax Maximum charging time

Claims (12)

First power receiving means for receiving power from a commercial power source;
A second power receiving means connected to the first power receiving means and receiving power from a power source other than the commercial power source;
A storage battery connected to the first power receiving means and the second power receiving means;
A quick charger characterized by having a function of charging an external device. The quick charger according to claim 1, wherein a maximum input power by the first power receiving unit is less than 50% of a maximum output power to the external device. Pb> 0.5 × Pomax and Qb> 0, where tmax is the maximum charging time for the external device, Pb is the output power of the storage battery, Qb is the effective capacity of the storage battery, and Pomax is the maximum output power. The quick charger according to claim 2, which is 0.5 × Pomax × tmax. When charging the external device, power corresponding to 50% of the maximum output power for the external device is output from the storage battery, and the power output from the storage battery and the power from the second power receiving means are insufficient. The quick charger according to any one of claims 1 to 3, wherein electric power is received by the first power receiving means. The quick charger according to any one of claims 1 to 4, wherein the second power receiving means receives power from a solar power generation device. And a power converter connected to the storage battery,
The quick charger according to claim 5, wherein the solar power generation device is connected to the storage battery side with respect to the power converter. The quick charger according to any one of claims 1 to 4, wherein the second power receiving means receives power from a wind power generator. The quick charger according to any one of claims 1 to 4, wherein the second power receiving means receives power from a power storage facility. The rapid charger according to any one of claims 1 to 8, wherein charging to the external device is stopped when a remaining amount of electricity stored in the storage battery decreases and a predetermined output cannot be obtained. Furthermore, a notification means is provided,
When the remaining charge of the storage battery is less than a value corresponding to the product of 50% of the maximum output power for the external device and the maximum charging time when charging the external device is started, the notification means The quick charger according to any one of claims 1 to 9, wherein a user is informed that charging may stop in the middle. When charging of the external device is started, the sum of the output power determined by the remaining amount of storage of the storage battery and the maximum charging time and the set value of the received power by the first power receiving means is applied to the external device. The quick charger according to any one of claims 1 to 9, wherein the maximum charging power is used. Furthermore, a notification means is provided,
When the remaining charge of the storage battery is less than a value corresponding to the product of 50% of the maximum output power for the external device and the maximum charging time when charging the external device is started, the notification means The quick charger according to any one of claims 1 to 9, wherein a user is notified of a delay in starting charging.

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