JP5957971B2 - Charging system - Google Patents

Description

  The present invention relates to a charging system for charging a storage battery mounted on a vehicle.

  A charging system that charges a storage battery mounted on a vehicle such as an EV (Electric Vehicle) or a PHV (Plug in Hybrid Vehicle) is disclosed in Patent Document 1, for example. And in the charging system of patent document 1, when charging several vehicles simultaneously, it controls so that the maximum supply electric energy of the power supply device which supplies electric power to each charger may not be exceeded. Specifically, even if a predetermined amount of charge is desirable as the amount of charge to be supplied to the charging target, if charging is being performed by another charger, the power supplied by these chargers The remaining power amount obtained by subtracting the amount from the maximum power supply amount of the power supply device is assigned to the charging target.

JP 2004-229355 A

  The above control can prevent the maximum supply power amount of the power supply device from being exceeded when the charging target side is configured to be charged with the instructed charge amount. However, the above-mentioned vehicles include, as charging specifications, compatible vehicles that can be charged by varying the charge amount and non-compliant vehicles that cannot be charged by varying the charge amount. In the non-compliant vehicle, even if the control unit instructs the charge amount, it is not known whether or not the charge is performed with the charge amount. For this reason, in a charging system, even when these vehicles are mixed and charged, it is desired to perform control so as not to exceed the maximum power supply amount determined on the power supply side.

  The present invention has been made paying attention to such problems existing in the prior art, and its purpose is to set the maximum supply power amount determined on the power supply side regardless of the charging specifications of the vehicle. The object is to provide a charging system capable of charging so as not to exceed.

In order to solve the above-described problems, the invention described in each claim includes a plurality of charging units that supply power for charging a storage battery mounted on a vehicle to the vehicle, and charging each externally supplied power. And a power supply unit that supplies power to the vehicle, a switching unit that switches a charging path for supplying power to the vehicle between the energized state and the non-energized state, and the charging unit to the vehicle. A determination unit that determines whether or not charging is possible, and a charging control unit that controls charging, wherein the charging control unit has an upper limit of the amount of power that each charging unit supplies to the vehicle. The upper limit power amount is set so that the total upper limit power amount does not exceed the maximum supply power amount of the entire system, and the upper limit power amount of each charging unit does not exceed the maximum supply power amount for each charging unit. Set the upper limit energy of each charging unit, and Each charging unit determines whether or not the upper limit power amount can be set to the maximum supply power amount for each charging unit when the number of charging units determined to be in a chargeable state by the determination unit increases. A maximum determination process that is determined based on the total upper limit power amount of the unit and the maximum supply power amount of the entire system, and when it is determined that setting is possible in the maximum determination process, a newly chargeable state The gist is to set the upper limit power amount of the charging unit determined to be the maximum power supply amount for each charging unit and to switch the charging path of the charging unit to the energized state.

  According to this, charging is performed by switching the charging path of the charging unit to the energized state so that the total amount of charging power by the charging unit in a chargeable state does not exceed the maximum supply power amount of the entire system. In other words, when the total amount of charging power exceeds the maximum supply power amount of the entire system, the charging path of the charging unit is switched to the energized state without exceeding. For this reason, the maximum amount of power supplied on the power supply side, regardless of the vehicle charging specifications, such as when vehicles that can be charged with variable charge and vehicles that cannot be charged with variable charge are mixed. The battery can be charged so as not to exceed.

In addition, by determining the maximum power supply amount for each charging unit, it is possible to perform charging by a plurality of charging units within the range of the maximum power supply amount of the entire system without biasing the power amount to a specific charging unit. . As a result, the efficiency of the entire system can be improved.
Furthermore, when setting the upper limit power amount of the charging unit for newly starting charging, the upper limit power amount is set as the maximum supply power amount. That is, it is possible to set the upper limit power amount without determining in advance the charging specifications of the vehicle to be charged by the charging unit.

In particular the invention according to claim 1, before Symbol charge controller, the upper limit electric energy of said maximum determining Charging unit If it is determined to be set is determined to be a new possible state of charge in When the maximum supply power amount for each charging unit is set, the charging path of the charging unit is switched to the energized state, and when it is determined that setting is not possible in the maximum determination process, the charging unit other than the charging unit to be set Performs a change determination process for determining whether there is a vehicle that can be charged following the change in the upper limit electric energy among the vehicles to be charged, and can be charged following the change determination process. When there is a vehicle, the upper limit electric energy of the charging unit that is newly determined to be rechargeable is reduced by reducing the upper limit electric energy of the charging unit for charging the vehicle. Electric power And summarized in that for switching the charging path of the charging unit energized and sets the.

According to this, when it is not possible to set the maximum amount of power supply as the upper limit amount of power, if a rechargeable vehicle to follow the change of the charging subject to the vehicle upper limit electric energy of the other charging unit, the charging The upper limit power amount is set to the maximum supply power amount by decreasing the upper limit power amount of the unit. For this reason, it can charge so that it may not exceed the maximum supply electric energy defined on the electric power supply side. And since the largest supply electric energy of the whole system is distributed to a some charging part, it can charge with a some charging part and can improve the efficiency of the whole system.

Invention according to claim 2, wherein the change in the charging system of claim 1, wherein the charge control section, the vehicle charging unit which is determined to be a new possible state of charge is to be charged When the determination process is executed and the change determination process determines that the vehicle can be recharged, the upper limit power amount of the charging unit determined to be newly chargeable and the upper limit power amount are decreased. The gist is to execute a leveling process for leveling the upper limit power amount of the charged part.

  According to this, if the vehicle which becomes the charge object of the charge part which starts charge newly is a vehicle which can be charged following the change of an upper limit electric energy, between the charge parts which reduced the upper limit electric energy. Level the upper limit power. For this reason, it can suppress that the upper limit electric energy of another charging part reduces extremely, and the efficiency of the said charging part falls. As a result, the efficiency of the entire system can be improved.

In particular the invention described in claim 3, the pre-Symbol charging control unit, the charging unit other than the charging portion is determined if it is determined that the non set a new possible state of charge in the maximum determination process is A change determination process for determining whether there is a vehicle that can be charged following the change in the upper limit electric energy among the vehicles to be charged is executed, and a vehicle that cannot be charged following the change determination process Is switched to the non-energized state and the maximum determination process is executed again. If it is determined that the maximum determination process can be set, a new charge is performed. The gist is to set the upper limit power amount of the charging unit determined to be in a possible state to the maximum power supply amount for each charging unit and to switch the charging path of the charging unit to the energized state.

According to this, when it is not possible to set the maximum amount of power supply as the upper limit amount of power, if non-rechargeable vehicle to follow the change of the charging subject to the vehicle upper limit electric energy of the other charging unit, the charging The upper limit electric energy is set to the maximum supply electric energy by switching the charging path of the unit to the non-energized state. For this reason, it can charge so that it may not exceed the maximum supply electric energy defined on the electric power supply side.

  According to the present invention, charging can be performed so as not to exceed the maximum power supply amount determined on the power supply side, regardless of the charging specifications of the vehicle.

The block diagram which shows the structure of a charging system. The graph which shows the transition example of the charging current value with respect to electric current command value. (A), (b) is explanatory drawing explaining the specific example of the charging control performed with the charging system in 1st Embodiment. (A)-(d) is explanatory drawing explaining a specific example similarly. (A)-(d) is explanatory drawing explaining a specific example similarly. (A)-(d) is explanatory drawing explaining a specific example similarly. (A)-(c) is explanatory drawing explaining the specific example of the charging control performed with the charging system in 2nd Embodiment. Explanatory drawing explaining another example.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, a storage battery 11 that stores power supplied to an electric motor (motor) (not shown) that serves as a prime mover of the vehicle 10 </ b> A is mounted on a vehicle 10 </ b> A such as an EV or a PHV. In addition, a vehicle control unit 12 that controls charging of the storage battery 11 is mounted on the vehicle 10A. In addition, a power converter 13 is mounted on the vehicle 10A. Further, the vehicle 10A is equipped with a communication unit 14 serving as an information receiving unit and an information transmitting unit. Then, the storage battery 11 of the vehicle 10A is charged by the power converted from the power supplied from the vehicle charging system K by the power converter 13. In addition, the storage battery 11, the vehicle control part 12, the power converter 13, and the communication part 14 are mounted also about the other vehicles 10B and 10C shown in FIG. 1 similarly to the vehicle 10A. And the storage battery 11 mounted in these vehicles 10B and 10C is also charged with the electric power supplied from the charging system K.

Hereinafter, a specific configuration of the charging system K will be described with reference to FIG.
The charging system K is connected to the power receiving facility 15 that receives power transmitted from the power system, and to the power receiving facility 15 and charging stations 16A and 16B that are connected to the vehicles 10A to 10C via the charging plug P during charging. , 16C. Charging stands 16A to 16C serve as a charging unit that supplies power for charging storage batteries 11 of vehicles 10A to 10C. The power receiving facility 15 is connected to a load facility as a power supply target to which power is supplied from the power receiving facility 15. The load facility is an object to which electric power is supplied by the power receiving facility 15 such as a lighting stand 16A to 16C or a lighting fixture arranged at a location where the charging system K is installed.

  In FIG. 1, for convenience of explanation, three charging stations 16 </ b> A to 16 </ b> C connected to the power receiving facility 15 are illustrated, and other load facilities are not illustrated. Moreover, charging stand 16A-16C is the same structure. Therefore, in FIG. 1, the detailed configuration of the charging stand 16A is illustrated, and the detailed configuration of the other charging stands 16B and 16C is not shown. The electric power system is a power transmission system for transmitting electric power and is owned by an electric power company. The charging plug P includes a power line for transmitting power and a signal line for transmitting and receiving information. The power receiving facility 15 and the charging stations 16A to 16C are connected by the power line L1 and the signal line L2.

  The power receiving facility 15 is provided with a power cut-off unit 17 serving as a main breaker that cuts off the power supply circuit when power that can be consumed from the power system is exceeded. The power available from the power system is determined by a supply and demand contract between the installer of the charging system K and the power company. In addition, the power receiving facility 15 is provided with a power supply unit 18 that supplies the power received from the power system to the charging stations 16A to 16C. The power received from the power system is the power supplied from the outside.

  The power receiving facility 15 is provided with a power measuring unit 19 that measures the amount of power supplied to each of the charging stations 16A to 16C. The power measuring unit 19 also measures a current value and a voltage value. The power receiving facility 15 is provided with a main control unit 20 that controls the charging stations 16A to 16C in an integrated manner. The main control unit 20 transmits a control signal for causing the charging stations 16A to 16C to perform charging. In addition, the main control unit 20 acquires the power value that is the measurement result of the power measurement unit 19 as the power value for each of the charging stations 16A to 16C. In addition, the power receiving facility 15 is provided with a communication unit 22 serving as an information transmission unit and an information reception unit.

  Each charging station 16 </ b> A to 16 </ b> C is provided with a sub-control unit 23 that separately controls charging of the vehicles 10 </ b> A to 10 </ b> C based on a control signal from the main control unit 20 of the power receiving facility 15. Each charging station 16A to 16C is provided with a communication unit 24 serving as an information transmission unit and an information reception unit. Each charging station 16A to 16C is provided with a power cut-off unit 25 serving as a branch breaker that cuts off the power supply circuit when the power handling capacity of the transmission line (power line L1) that supplies power to the vehicles 10A to 10C is exceeded. It has been.

  In addition, each of the charging stations 16A to 16C is provided with an electromagnetic contactor (magnet contactor) MC as a switching device on the power line L1 between the power cutoff unit 25 and the charging plug P. The magnetic contactor MC has a contact (normally open contact). Then, the contact of the magnetic contactor MC switches the power line L1 between an energized state and a non-energized state. More specifically, the contact of the magnetic contactor MC makes the power line L1 in a non-energized state in the open state (OFF state), and turns on the power line L1 in the closed state (ON state). And when the contact of electromagnetic contactor MC is an open state, it will be in a non-energized state and electric power supply to vehicle 10A-10C will not be performed from charging stand 16A-16C. On the other hand, when the contact of the magnetic contactor MC is in a closed state, power is supplied and power is supplied from the charging stations 16A to 16C to the vehicles 10A to 10C. In this embodiment, the contact state of the magnetic contactor MC is controlled by the control signal output from the sub-control unit 23. The magnetic contactor MC is provided in each of the charging stations 16A to 16C.

  Each sub-control unit 23 determines whether there is a vehicle to be charged based on information transmitted from the vehicles 10A to 10C via the signal line L2, that is, whether the charging plug P is connected to the vehicle. To detect. In this detection, the charging system K of the present embodiment uses the CPLT (control pilot) function to check the connection with the vehicles 10A to 10C. The vehicle control unit 12 is activated when the signal voltage rises to the initial voltage, and lowers the signal voltage from the initial voltage to a predetermined voltage after activation. When the sub-control unit 23 confirms the change in the signal voltage from the initial voltage, it detects that the charging plug P is connected to the vehicle. And each sub-control part 23 will transmit a vehicle connection signal to the main control part 20, if a connection is detected. In the present embodiment, the main control unit 20 determines whether or not the charging unit can charge the vehicle by receiving the vehicle connection signal. Therefore, the main control unit 20 of the present embodiment functions as a determination unit. Further, the vehicle control unit 12 that has lowered the signal voltage to a predetermined voltage starts preparation for charging, and further lowers the signal voltage after preparation. And if the change of this signal voltage is further detected, the main control part 20 and the sub control part 23 will start charge. In the operation of CPLT, if the voltage does not change from 9V to 6V, the preparation for charging is not completed and charging is not started, so it is determined that the vehicle is not connected in terms of power distribution control. It is also possible to do. That is, it is also possible to determine the “extraction” state as the insertion / extraction state shown in FIGS.

In the charging system K of the present embodiment configured as described above, the following charging control is performed.
The main control unit 20 of the power receiving facility 15 determines the amount of power to be allocated to the charging stations 16A to 16C that perform charging. This electric energy indicates the upper limit electric energy (charging electric energy) distributed to the charging stations 16A to 16C in the charging control of the main control unit 20. And in this embodiment, the main control part 20 determines the upper limit electric energy of each charging station 16A-16C so that the 1st condition and the 2nd condition may be satisfied.

  The first condition is that the total amount of power supplied from the power receiving facility 15, that is, the total amount of power supplied from the charging stations 16 </ b> A to 16 </ b> C does not exceed the maximum supplied power amount determined for the entire charging system K. Is to do. The maximum amount of power supplied by the charging system K is the amount of power on a supply-demand contract that can be used from the power system. When the maximum supply power amount is exceeded in the charging system K, the power cut-off unit 17 cuts off the power supply circuit. Hereinafter, the first condition may be referred to as “system condition”.

  Next, the second condition is that the amount of power supplied from each charging station 16A to 16C does not exceed the maximum amount of power supplied for each charging station 16A to 16C. The maximum power supply amount for each of the charging stations 16A to 16C is an electric energy determined according to the facility specifications of the charging stations 16A to 16C. When the maximum supply power amount is exceeded in the charging stations 16 </ b> A to 16 </ b> C, the power cut-off unit 25 cuts off the power supply circuit. Hereinafter, the second condition may be referred to as “stand-specific condition”. Note that the maximum supply power amount of the charging system K is larger than the maximum supply power amount for each of the charging stations 16A to 16C.

  The main control unit 20 sets the upper limit for the charging stations 16A to 16C to be charged, that is, the charging stations 16A to 16C receiving the vehicle connection signal, so as to satisfy the above-described system conditions and stand-specific conditions. Determine the amount of power. For example, when receiving a vehicle connection signal from the charging station 16A, the main control unit 20 determines the upper limit power amount of the charging station 16A. Moreover, the main control part 20 determines the upper limit electric energy of each charging station 16A, 16B, when the vehicle connection signal is received from charging station 16A, 16B.

  The main control unit 20 determines the upper limit power amount of each of the charging stations 16A to 16C according to the number of charging stations to be charged. Specifically, the main control unit 20 increases the maximum power supply amount as the upper limit power amount as the number of charging stations that are in a charged state capable of supplying power to the vehicle side due to the connection of the charging plug P decreases. It is easy to determine a near power amount. On the other hand, the main control unit 20 may determine a lower amount of power than the maximum power supply amount as the upper limit power amount as the number of charging stations in a charged state increases. Further, the main control unit 20 determines the upper limit power amount according to a change in increase / decrease in the number of charging stations. Specifically, when the number of charging stations in the charging state increases, the main control unit 20 reduces the amount of power distributed to the charging stations that have already started charging, to newly charge the charging station. The upper limit power amount to the charging station is secured.

  The main control unit 20 that has determined the upper limit power amount as described above, based on the upper limit power amount and the voltage value that is the measurement result of the power measurement unit 19, serves as a command value to each charging station 16 </ b> A to 16 </ b> C. Calculate the command value. In addition, the main control unit 20 transmits the current command value to the sub-control units 23 of the charging stations 16A to 16C via the communication unit 22 and the communication unit 24. Then, the sub-control unit 23 that has received the current command value transmits the current command value to the vehicle control unit 12 of the vehicles 10A to 10C to be charged by the charging stations 16A to 16C. In addition, the sub-control unit 23 that has received the current command value controls the electromagnetic contactor MC to be closed along with the transmission of the current command value. The sub-control unit 23 maintains the electromagnetic contactor MC in the closed state until the charging is completed, and returns the electromagnetic contactor MC to the open state after the charging is completed. Thereby, each vehicle control part 12 charges the storage battery 11 based on the received electric current command value, and electric power is supplied to the vehicles 10A to 10C from the charging stations 16A to 16C. In the present embodiment, the main control unit 20 and each sub control unit 23 constitute a charge control unit.

  In the vehicles 10A to 10C, a corresponding type vehicle that can change and control the charging current value so as to follow the current command value after the change due to the change in the upper limit electric energy, and the current command value that can be followed are fixed values. There is a non-compliant vehicle that cannot change and control the charging current value. The charging current value is a value of a current that actually flows to the vehicle 10A to 10C side during charging. This charging current value can be measured as a measurement result of the power measuring unit 19. In the case of a compatible vehicle, the current command value matches the charging current value, or the charging current value falls within a predetermined error range with respect to the current command value. The compatible vehicle can be charged following the change in the upper limit electric energy. On the other hand, in the case of a non-compliant vehicle, the charging current value may be outside the predetermined error range with respect to the current command value. The non-compliant vehicle cannot be charged following the change in the upper limit electric energy.

FIG. 2 shows a transition example of the charging current value in the compatible vehicle and the non-compatible vehicle.
In addition, the continuous line which attaches | subjects code | symbol "X" in a figure shows an electric current command value. Moreover, the dashed-dotted line which attach | subjects code | symbol "Y" in a figure shows the charging current value in a corresponding | compatible vehicle. Also, the alternate long and short dash line with the symbol “Z” in the figure indicates the charging current value in the non-compatible vehicle.

  In the transition example of FIG. 2, the current command value has a period Tz1 as a current command value Ia and a period Tz2 as a current command value Ib. Further, “Iy1” in the figure indicates an error range set for the current command value Ia, and “Iy2” in the figure indicates an error range set for the current command value Ib.

  As shown in FIG. 2, when the current command value is changed (variable) from the current command value Ia to the current command value Ib, the charging current value Y of the corresponding vehicle follows the current command values Ia and Ib. On the other hand, as shown in FIG. 2, the charging current value Z of the non-compliant vehicle does not follow the current command value after the change with the change of the current command value. FIG. 2 shows an example in which the charging current value Z follows the current command value Ia and the charging current value Z does not follow the current command value Ib. However, depending on the specification of the incompatible vehicle, FIG. The charging current value Z may not follow both the current command values Ia and Ib.

  In this way, the main control unit 20 compares the current command values Ia and Ib with the charging current values Z and Y that are the measurement results of the power measuring unit 19, so that the current command value and the charging current value follow from each other. It is possible to determine whether the vehicle is a compliant vehicle or a non-compliant vehicle. That is, the main control unit 20 can determine from the followability by actually changing the current command value. In addition, the maximum charging current value that can be handled when the vehicle control unit 12 of each of the vehicles 10A to 10C charges the storage battery 11 is determined for the vehicles 10A to 10C according to the charging specifications of the vehicles. The maximum charging current value is determined by the conversion capability of the power converter 13 included in the vehicles 10A to 10C. For this reason, when the current command value instructed by the main control unit 20 exceeds the maximum charging current value that can be handled by the vehicle, the vehicle is charged at the maximum charging current value. Thereby, the charging current value may not follow the current command value. Therefore, when determining whether the vehicle is a compatible vehicle or a non-compliant vehicle based on the followability of the charging current value with respect to the current command value, it is necessary to change the current command value.

  In addition, when the current command value less than the maximum charging current value of the vehicle is instructed to the non-compliant vehicle, the vehicle is charged with the maximum charging current value. That is, in this case, a current equal to or greater than the current command value flows through the vehicle. However, the charging stations 16A to 16C can flow a current equal to or greater than the current command value to the vehicles 10A to 10C.

Hereinafter, the operation of the charging system K of the present embodiment will be described.
The operation will be described based on the specific examples shown in FIGS.
In this specific example, the charging system K is constructed by three charging stations 16A to 16C. In addition, the current value corresponding to the maximum power supply amount of each charging station 16A to 16C is [16 (A)], and the current value corresponding to the maximum power supply amount of the charging system K is [40 (A)]. In the present embodiment, the current value [40A] is the maximum current value that can be allocated to the upper limit electric energy of the charging stations 16A to 16C. According to this setting, each of the charging stations 16A to 16C can supply the amount of electric power corresponding to the current value [16 (A)] to the vehicles 10A to 10C to be charged, respectively, with the maximum amount of electric power supplied. Further, according to this setting, the charging system K can supply each of the charging stations 16A to 16C with the amount of power corresponding to the current value [40 (A)] as the maximum amount of power supply.

  FIG. 3A shows a setting in an initial state where the number of uses of the charging system K is [0]. In the initial state, since the vehicles 10A to 10C are not connected to any of the charging stations 16A to 16C, no vehicle connection signal is output. In the “insertion / removal state” column of each figure, “insertion” is described in the charging station to which the vehicle is connected, and “extraction” is described in the charging station to which the vehicle is not connected. In the initial state, the current command value of each of the charging stations 16A to 16C is 0 (A), and the charging current value that is the measurement result of the power measuring unit 19 is also 0 (A).

  When one vehicle arrives in the initial state and the number of uses of the charging system K reaches [1], as shown in FIG. 3B, a charging stand to which the vehicle is connected (in the specific example, a charging stand 16A). The insertion / removal state of is “insertion”. And the main control part 20 will perform the setting for starting charge of 10 A of vehicles connected to the charging stand 16A, if a vehicle connection signal is received from the charging stand 16A. The main control unit 20 determines the upper limit electric energy of the charging station 16A so as to satisfy the above-described system conditions and conditions for each station, and transmits a current command value to the charging station 16A. At this stage, since only the vehicle 10A uses the charging system K, there is a sufficient margin as the maximum power supply amount of the charging system K. Moreover, the main control unit 20 determines the upper limit power amount in a state where it is not recognized whether the vehicle 10A is a compatible vehicle. For this reason, as shown in FIG. 4A, the main control unit 20 determines the maximum power supply amount of the charging station 16A as the upper limit power amount, and has a maximum value as a current command value corresponding to the power amount. Assign 16 (A). That is, the main control unit 20 determines that the maximum supply power amount can be set as the upper limit power amount of the charging station in the maximum determination process for determining whether or not the maximum supply power amount can be set.

  Then, the sub-control unit 23 of the charging station 16A that has received the current command value switches the electromagnetic contactor MC from the open state to the closed state to bring the power line L1 into the energized state, and uses the received current command value for the vehicle of the vehicle 10A. Transmit to the control unit 12. Thereby, charging of the vehicle 10A is started. At this time, electric power corresponding to the current command value is supplied to the vehicle 10A as the upper limit electric energy. In this specific example, as shown in FIG. 4B, the amount of power supplied to the charging stand 16A is the upper limit power amount (the amount of power corresponding to 16 (A)), and the power measuring unit 19 performs charging. As a current value, 16 (A) is measured.

  Next, when another vehicle arrives while the vehicle 10A is being charged and the number of uses of the charging system K becomes [2], a new vehicle is connected as shown in FIG. 4 (c). The insertion / extraction state of the charging stand (in the specific example, the charging stand 16B) is “insertion”. And the main control part 20 will perform the setting for starting charge of the vehicle 10B connected to the charging stand 16B, if a vehicle connection signal is received from the charging stand 16B. The main control unit 20 determines the upper limit electric energy of the charging stations 16A and 16B so as to satisfy the system conditions and the conditions for each station, and transmits a current command value to the charging stations 16A and 16B. At this stage, even if each of the charging stations 16A and 16B supplies the maximum power supply amount, there is a sufficient margin as the maximum power supply amount of the charging system K. The main control unit 20 determines the upper limit power amount in a state where the vehicle 10A, 10B does not recognize whether or not the vehicle is a compatible vehicle. For this reason, as shown in FIG. 4 (d), the main control unit 20 determines the maximum power supply amount of the charging stations 16A and 16B as the respective upper limit power amounts, and sets the current command value corresponding to the power amount. The maximum value of 16 (A) is assigned. That is, in the maximum determination process, the main control unit 20 determines that the maximum power supply amount can be set as the upper limit power amount of the charging station 16B to which the vehicle is newly connected.

  Then, the sub-control unit 23 of the charging station 16B that has received the current command value switches the electromagnetic contactor MC from the open state to the closed state to bring the power line L1 into the energized state, and uses the received current command value for the vehicle of the vehicle 10B. Transmit to the control unit 12. Thereby, charging of the vehicle 10B is newly started. At this time, electric power corresponding to the current command value is supplied to the vehicles 10A and 10B as the upper limit electric energy. In this specific example, as shown in FIG. 5A, the amount of power supplied to the charging stations 16A and 16B is the upper limit power amount (power amount corresponding to 16 (A)), and the power measuring unit 19 Then, 16 (A) is measured as each charging current value. Further, the total value of the charging current values is 32 (A).

  Next, when another vehicle arrives while the vehicles 10A and 10B are being charged and the number of uses of the charging system K becomes [3], as shown in FIG. The insertion / extraction state of the connected charging stand (in the specific example, the charging stand 16C) is “insertion”. And the main control part 20 will perform the setting for starting charge of the vehicle 10C connected to the charging stand 16C, if a vehicle connection signal is received from the charging stand 16C. The main control unit 20 determines the upper limit electric energy of the charging stations 16A to 16C so as to satisfy the above-described system conditions and conditions for each station, and transmits a current command value to the charging stations 16A to 16C. At this stage, since each of the charging stations 16A and 16B supplies the maximum power supply amount, the remaining power amount is less than the maximum power supply amount of the charging station 16C. In other words, the remainder is 40 (A) corresponding to the maximum power supply amount of the charging system K, and 32 (A) which is the sum of the charging current values corresponding to the power amounts supplied by the charging stations 16A and 16B. The amount of power is equivalent to 8 (A) after subtraction. Therefore, the main control unit 20 cannot secure the maximum power supply amount as the upper limit power amount of the charging station 16C. That is, the main control unit 20 determines that the maximum power supply amount cannot be set as the upper limit power amount of the charging station 16C to which a vehicle is newly connected in the maximum determination process.

  As described above, the main control unit 20 determines the upper limit power amount in a state in which the vehicles 10A to 10C are not aware of whether or not they are compatible vehicles. For this reason, if charging is started with the upper limit electric energy of the charging station 16C as the remaining electric energy equivalent to 8 (A), the system condition, that is, the maximum supply electric energy of the charging system K may be exceeded. is there. That is, when the vehicle 10C is a compatible vehicle, the charging current value follows the current command value even if the current command value is 8 (A). Does not exceed the maximum power supply. However, when the vehicle 10C is a non-compliant vehicle, the charging current value may not follow the current command value. That is, the charging current value may exceed the current command value. As a result, the system condition is satisfied in terms of control, that is, on the basis of the current command value, but actually, the total charging current value exceeds 40 (A) and is not satisfied.

  Accordingly, when determining the upper limit electric energy of the charging station 16C, the main control unit 20 determines whether the vehicle connected to the charging stations 16A and 16B that are already being charged is a compatible vehicle or a non-compatible vehicle. It is determined whether it exists (change determination process). In this determination, the main control unit 20 performs control to change the current command values of the charging stations 16A and 16B. Specifically, the main control unit 20 determines the upper limit electric energy to be allocated to the other charging stations 16A and 16B so that the current command value to the charging station 16C becomes a value corresponding to the maximum supplied electric energy. In a specific example, the electric energy corresponding to 24 (A) obtained by subtracting 16 (A) from 40 (A) is equally allocated as the upper limit electric energy of the charging stations 16A and 16B. That is, as shown in FIG.5 (c), upper limit electric energy is determined so that the electric current command value to charging stand 16A, 16B may be 12 (A), and the electric current command value is transmitted. At this time, the sum of the current command values of the charging stations 16A and 16B decreases from 32 (A) to 24 (A) as shown in FIG.

  Then, the main control unit 20 determines whether the vehicles 10A and 10B to be charged in the charging stations 16A and 16B are compliant vehicles based on the measurement result of the power measurement unit 19 after the transmission of the current command value. Alternatively, it is determined whether the vehicle is a non-compatible vehicle. Specifically, the main control unit 20 compares the current command value with the charging current value, and determines whether or not the charging current value follows the current command value. In the specific example, as shown in FIG. 5D, the current command value and the charging current value are both 12 (A) for the charging station 16A, and the current command value is 12 (A) for the charging station 16B. In contrast, the charging current value is 16 (A). That is, in this case, the vehicle 10A of the charging station 16A can be determined as a compatible vehicle because the charging current value follows the current command value. On the other hand, the vehicle 10B of the charging station 16B can be determined as a non-compliant vehicle because the charging current value does not follow the current command value.

  And the main control part 20 determines the upper limit electric energy to charge stand 16A-16C based on said determination result. More specifically, the main control unit 20 determines the upper limit power amount of the charging station 16B for charging a non-compliant vehicle as a maximum supply power amount, that is, an amount with which the current command value is 16 (A). In addition, the main control unit 20 determines the upper limit power amount of the charging station 16C as the maximum supply power amount, that is, an amount with which the current command value is 16 (A). Then, the main control unit 20 determines the upper limit electric energy of the charging station 16A as an electric energy obtained by subtracting the total electric energy of the upper limit electric energy of the charging stations 16B and 16C from the maximum supply electric energy of the charging system K. That is, the main control unit 20 determines the upper limit electric energy of the charging station 16A to be an electric energy corresponding to 8 (A) obtained by subtracting 32 (A) from 40 (A). Then, as shown in FIG. 6A, the main control unit 20 transmits a current command value corresponding to the upper limit electric energy of the charging stations 16A and 16B determined as described above. In this specific example, as shown in FIG. 6A, the current command value of the charging station 16A is 8 (A), and the current command value of the charging station 16B is 16 (A).

  Next, the main control unit 20 determines whether the charging stations 16A and 16B follow the current command value with respect to the charging current value based on the measurement result of the power measuring unit 19 after the transmission of the current command value. Determine whether. When the main control unit 20 determines that the charging current value follows the current command value at the charging stands 16A and 16B, as shown in FIG. Thus, the current command value 16 (A) is transmitted to the charging station 16C. As a result, the sum of the current command values to the charging stations 16A to 16C is 40 (A) corresponding to the maximum power supply amount of the charging system K. Then, the sub-control unit 23 of the charging station 16C that has received the current command value switches the electromagnetic contactor MC from the open state to the closed state to bring the power line L1 into the energized state, and uses the received current command value for the vehicle of the vehicle 10C. Transmit to the control unit 12. Thereby, charging of the vehicle 10C is newly started.

  With the above control, as shown in FIG. 6 (d), the vehicle 10A is supplied with electric power corresponding to 8 (A) as the current command value as the upper limit electric energy, and the vehicles 10B and 10C are supplied with the current command. Electric power corresponding to 16 (A) as a value is supplied as the upper limit electric energy. As a result, as shown in FIG. 6D, the power measuring unit 19 measures 8 (A) as the charging current value of the charging station 16A and 16 (A) as the charging current value of the charging stations 16B and 16C. ) Is measured. Further, the total value of the charging current value is 40 (A).

  Thereafter, when the vehicle connection signals from the charging stations 16A to 16C are not received, the main control unit 20 determines that charging of the charging stations 16A to 16C has been completed. In addition, when a new vehicle is connected to the charging station that has completed charging, the main control unit 20 performs the above-described control in the same manner to perform charging. In the change control shown in FIGS. 5C and 5D, when any charging station 16A, 16B does not follow the charging current value with respect to the current command value, that is, neither the vehicle 10A, 10B In the case of a compatible vehicle, the main control unit 20 does not start charging the charging station 16C. That is, in the case of a non-compliant vehicle, the maximum power supply amount cannot be secured as the upper limit power amount of the charging station 16C. Therefore, the main control unit 20 does not start charging because it does not know whether the vehicle 10C to be charged by the charging stand 16C is a compatible vehicle or a non-compatible vehicle.

Therefore, according to the present embodiment, the following effects can be obtained.
(1) The charging paths (power lines L1) of the charging stations 16A to 16C are switched to the energized state so as not to exceed the maximum power supply amount of the charging system K. That is, in the present embodiment, when the maximum power supply amount of the charging system K is exceeded, the charging path is switched to the energized state without exceeding. For this reason, when a compatible vehicle and a non-compatible vehicle coexist, charging can be performed so as not to exceed the maximum supply power amount determined on the power supply side regardless of the charging specifications of the vehicle.

  (2) Further, by determining the maximum power supply amount for each of the charging stations 16A to 16C, the plurality of charging stations are within the range of the maximum power supply amount of the charging system K without biasing the power amount to a specific charging station. Charge by 16A-16C can be performed. As a result, the efficiency of the charging system K can be improved.

  (3) When setting the upper limit power amount of the charging station for newly starting charging, the upper limit power amount is set as the maximum supply power amount. For this reason, an upper limit electric energy can be set, without discriminating beforehand the charge specification of the vehicle used as the charge object of the charge stand. If the maximum power supply amount cannot be set as the upper limit power amount and the vehicle to be charged at another charging station is a compatible vehicle, the upper limit power amount is reduced by reducing the upper limit power amount of the charging station. Set to the maximum power supply. For this reason, it can charge so that it may not exceed the maximum supply electric energy defined on the electric power supply side. And since the maximum supply electric energy of the charging system K is distributed to a some charging stand, it can charge with a some charging stand and can improve the efficiency of the charging system K. FIG.

  (4) In the change determination process, since it is determined whether the vehicle is a compatible vehicle from the change in the charging current value when the current command value is actually varied, the determination can be made directly, and the accurate determination It can be performed. And according to the change determination process of this embodiment, it is not necessary to preset a parameter (vehicle type information etc.) beforehand for determination. Therefore, the configuration of the charging system K can be simplified.

  (5) Since it is determined according to the insertion / extraction state of the charging plug P whether the charging stations 16A to 16C are in a charging state or a non-charging state, an accurate determination can be made with a simple configuration. .

  (6) Since the main control unit 20 determines the upper limit electric energy based on the determination result of the insertion / extraction state of the charging plug P, the upper limit electric energy is allocated to the charging station in the non-charged state, and the unnecessary electric energy is allocated. It will not be generated. That is, since the main control unit 20 assigns the upper limit power amount to the charging station in the charged state, it suppresses the generation of wasted power. As a result, charging efficiency can be improved.

  (7) Since the main control unit 20 determines the upper limit electric energy based on the determination result of the insertion / extraction state of the charging plug P, the main control unit 20 always uses the electric power corresponding to the maximum supply electric energy of the charging system K for charging. be able to. In the charging system K, not all charging stations are always charging. For this reason, the control of this embodiment can suppress the generation of useless power, and can perform charging at a plurality of charging stations without excessively increasing the contract power by redistribution of power or the like. . Therefore, the cost of the installer of the charging system K can be suppressed by suppressing the contract power.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to FIG.
In addition, about the same structure as embodiment already demonstrated in the following embodiment, the overlapping description is abbreviate | omitted or simplified by attaching | subjecting the same code | symbol.

  In the present embodiment, in addition to the control of the first embodiment, after the change of the current command value, a leveling process for leveling the upper limit electric energy between the corresponding vehicles is executed. Hereinafter, the leveling process executed by the main control unit 20 will be described with reference to FIG.

  The upper limit electric energy of each charging station 16A to 16C shown in FIG. 6 (d) is greatly reduced from the upper electric energy of the charging station 16A for charging the corresponding vehicle. For this reason, the main control unit 20 determines whether the vehicle 10C connected to the charging station 16C is a compatible vehicle or a non-compatible vehicle. That is, as shown in FIG. 7A, the main control unit 20 reduces the upper limit power amount of the charging station 16C. In the case of a specific example, the main control unit 20 determines the upper limit electric energy of the charging station 16C so that the current command value of the charging station 16C becomes 12 (A). Then, the main control unit 20 transmits a current command value to the charging station 16C. In the specific example, the reason why the upper limit electric energy of the charging station 16C is determined to be the electric energy at which the current command value is 12 (A) is to equalize the current command values of the charging stations 16A and 16C as the same value. .

  Next, based on the measurement result of the power measurement unit 19 after the transmission of the current command value, the main control unit 20 determines whether the vehicle 10C to be charged by the charging station 16C is a compatible vehicle or is not compatible. It is determined whether it is a type vehicle. That is, the main control unit 20 compares the current command value transmitted to the charging station 16C with the charging current value, and determines whether or not the charging current value follows the current command value. Then, as shown in FIG. 7B, the main control unit 20 can determine that the vehicle 10C of the charging station 16C is a compatible vehicle when the current command value of the charging station 16C matches the charging current value. .

  Then, the main control unit 20 determines the upper limit electric energy to the charging stations 16A and 16C whose charging targets are compatible vehicles based on the above determination result. In the specific example, since the upper limit power amounts of the charging stations 16A and 16C are leveled, the upper limit power amount is determined so that the current command value for both is 12 (A). As a result, the upper limit electric energy of the charging station 16A is reduced to the electric energy equivalent to 8 (A) as shown in FIG. 6B by the third visitor, but the leveling process described in this embodiment is performed. To increase the amount of power corresponding to 12 (A). When the vehicle 10C of the charging station 16C is a non-compliant vehicle, the main control unit 20 performs charging while maintaining the state of FIG.

Therefore, according to this embodiment, in addition to the effects (1) to (7) of the first embodiment, the following effects can be obtained.
(8) If the vehicle 10C is a vehicle that can be charged following the change in the upper limit electric energy, the upper limit electric energy is leveled with the charging station 16A in which the upper limit electric energy is reduced. For this reason, it can suppress that the upper limit electric energy of another charging stand reduces extremely, and the efficiency of the said charging stand falls. As a result, the efficiency of the entire charging system K can be improved.

In addition, you may change the said embodiment as follows.
○ In the embodiment, as shown in FIG. 5B, when it is determined that the maximum power supply amount cannot be set in the charging station 16C in the maximum determination process, the change determination process is executed. If it is determined that it is impossible, the upper limit power amount of the charging station 16C may not be set, and the electromagnetic contactor MC may be maintained in the open state. In this case, the power line L1 of the charging station 16C is in a non-energized state. And in this example of another, when the sum total of the upper limit electric energy of other charge stand 16A, 16B falls, the maximum determination process is performed about charge stand 16C again. If it is possible to set as a result of the maximum determination process, the upper limit power amount of the charging station 16C may be set to the maximum supply power amount, and the electromagnetic contactor MC may be closed, that is, the power line L1 may be energized. Thereby, the charging station 16C can charge the vehicle 10C. According to this example, charging cannot be started when the upper limit power amount of the charging station at which charging is newly started cannot be set as the maximum supply power amount. Therefore, charging can be performed so as not to exceed the maximum power supply amount determined on the power supply side. In addition, the upper limit electric energy can be set without determining in advance the charging specifications of the vehicle to be charged in the charging station where charging is newly started, and the control can be simplified.

  In the embodiment, as shown in FIG. 5B, when it is determined that the maximum power supply amount cannot be set in the charging station 16C in the maximum determination process, the change determination process is executed, and the result of the process is received for each charging station. The upper limit electric energy of 16A-16C is set. Instead, when there is a non-compliant vehicle in the change determination process, the charging of the charging station for charging the non-compliant vehicle is interrupted. If the maximum determination process can be performed again and set, the upper limit power amount of the new charging station is set to the maximum supply power amount, and the electromagnetic contactor MC is closed, that is, the power line L1 is turned on. good. If it demonstrates using the specific example of embodiment, since the vehicle 10B of the charge stand 16B is a non-correspondence type vehicle, the charge of the charge stand 16B will be interrupted. Instead, the upper limit power amount of the charging station 16C is set to the maximum supply power amount, and the power line L1 is turned on to start charging the vehicle 10C. In addition, about the charge stand which interrupted charge, charge will be restarted if it will be in the state which can set the maximum supply electric energy as an upper limit electric energy of the said charge stand. According to this alternative example, if the upper limit power amount of the charging station for starting charging anew cannot be set as the maximum supply power amount, if the non-compliant vehicle is charged at another charging stand, the charging is performed. Stop charging the stand and start charging a new charging stand. Therefore, charging can be performed so as not to exceed the maximum power supply amount determined on the power supply side. In addition, the upper limit electric energy can be set without determining in advance the charging specifications of the vehicle to be charged in the charging station where charging is newly started, and the control can be simplified.

  In the above example, the charging of the non-compliant vehicle is interrupted. However, the priority order may be set in advance, and the charging of the charging station with the lower priority order may be interrupted. For example, as described above, the priority of the corresponding vehicle may be set higher than the priority of the non-compatible vehicle as described above. Moreover, as a priority order, the order with respect to a charging stand may be sufficient, and you may rank according to the some amount of charge amount or charge elapsed time. Moreover, you may rank in order of charge start as a priority.

  ○ When the vehicle 10A to 10C or the power receiving equipment 15 is equipped with a timer function for setting the charging start time, it is determined whether the charging time is reached or not depending on whether the timer time has arrived. You may do it. In addition, when the timer function is mounted in the vehicles 10A to 10C, the main control unit 20 determines that the vehicle is in a charged state when receiving a charging permission signal from the vehicles 10A to 10C.

  (Circle) you may set the maximum supply electric energy of the charging system K for satisfying the system condition in the case of determining the upper limit electric energy of charging stand 16A-16C as follows. That is, when the power supply target of the power receiving facility 15 is added to the charging stand as another load facility, the maximum of the charging system K that distributes the amount of power necessary for the load facility in advance to the charging stations 16A to 16C. The amount of power supply may be used. Moreover, when determining the upper limit power amount of the charging stations 16A to 16C, the amount of power supplied to other load facilities may be taken into consideration each time.

  The main control unit 20 and the sub control unit 23 use the measurement result of the power measuring unit 19 as the amount of charging power by the charging station in a chargeable state so that the total does not exceed the maximum supply power amount of the charging system K. In addition, the power line L1 may be switched to the energized state.

  The main control unit 20 may be provided outside the power receiving facility 15. Further, any one of the plurality of sub-control units 23 may function as the main control unit 20. In this case, each charging station 16 </ b> A to 16 </ b> C transmits information to the charging station provided with the sub-control unit 23 that functions as the main control unit 20.

O It may be detected whether or not the charging plug P is connected by power line communication (PLC) using the power line as a communication line.
The current command value instructed by the main control unit 20 may be changed to a power command value or a voltage command value.

  The main control unit 20 may determine the upper limit power amount and transmit a command value indicating the power amount to the sub control unit 23, and the sub control unit 23 may calculate the current command value. In this case, if the voltage value in the charging system K is a constant value, the sub-control unit 23 can calculate the current command value from the electric energy. The sub-control unit 23 may calculate the current command value by regarding the voltage value as constant.

O Information transmission / reception with vehicles 10A-10C, charge stands 16A-16C, and power receiving equipment 15 may be performed by wireless communication.
○ The number of charging stations provided in the charging system K may be changed to three or more.

The charging system K may be embodied as a public facility (such as an educational institution or a public hall), a commercial facility (such as an accommodation facility, a shopping facility, or a charging station) or a household facility.
Each embodiment is embodied in the charging system K that performs charging by mechanically connecting the charging plug P to the vehicles 10A to 10C, but without using the charging plug P, the vehicle and the charging unit (ground side equipment) ) May be embodied in a non-contact charging system in which charging is performed by electrical connection. As shown in FIG. 8, in the non-contact charging system, the power receiving side coil 35 attached to the vehicle 10 side and the power transmitting side coil 37 of the ground side equipment 36 embedded in the floor of the charging station are aligned. Thus, the vehicle 10 is stopped. At this time, the power reception side coil 35 and the power transmission side coil 37 are separated and brought into a non-contact state. In the non-contact charging system, the storage battery of the vehicle 10 is charged by receiving the power from the power transmission side coil 37 by the power reception side coil 35. Such a contactless charging system includes a resonance method and an electromagnetic induction method. In the non-contact charging system, the vehicle-side controller 38 mounted on the vehicle 10 and the power-side controller 39 installed on the ground-side facility 36 can communicate wirelessly. That is, transmission / reception of a signal necessary for charging, such as a charging start / stop signal, is performed by wireless communication between the vehicle-side controller 38 and the power supply-side controller 39. In the non-contact charging system, the ground-side equipment 36 corresponds to the charging stations 16A and 16B serving as the charging units in the embodiment, and the power receiving equipment 15 is provided in the charging station. In the case of a non-contact type charging system, it may be determined that the power receiving side coil 35 of the vehicle 10 and the power transmitting side coil 37 of the ground side facility 36 are arranged in a charged state. Moreover, it can be said that being arranged in alignment is a state where power can be transmitted.

In the non-contact charging system described in the above other example, signal transmission / reception between the vehicle controller 38 and the power supply controller 39 may be superimposed on power transmission.
The charging system K may be constructed by mixing the mechanical stand for connecting the charging plug P to the vehicle described in the embodiment and the non-contact type stand described in the above-described another example.

  (Circle) you may provide the electric power measurement part 19 for every charge stand 16A-16C. In this case, each power measurement unit 19 transmits the measurement result to the main control unit 20. Moreover, the electric power measurement part 19 for every charging stand 16A-16C may be incorporated in each charging stand 16A-16C, and the electric power line L1 which connects the electric power supply part 18 of the receiving device 15 and each charging stand 16A-16C It may be arranged.

  O When the voltage value is constant in the charging system K or when the voltage value is considered constant, a current measuring unit may be provided instead of the power measuring unit 19. In this case, the electric energy can be calculated from the measurement result by measuring the current.

Next, a technical idea that can be grasped from the above embodiment and another example will be added below.
(A) The power supply unit supplies power to a plurality of power supply targets including the charging unit, and the charge control unit does not exceed the maximum supply power amount of the entire system. as such, charging system that and sets the upper limit electric energy of each charging unit.

(B) When the upper limit power amount is set, the charge control unit determines whether the upper limit power amount can be set as the maximum supply power amount for each charging unit, and determines whether the total upper limit power amount of each charging unit and the entire system When the maximum determination process that is determined based on the maximum supply power amount is performed and it is determined that the maximum determination process can be set, the upper limit power amount of the charging unit to be set is set as the maximum supply power amount for each charging unit. When setting, the charging path of the charging unit is switched to the energized state, and when it is determined that setting is not possible in the maximum determination process, the charging path of the charging unit with the lower priority is de-energized according to a predetermined priority order. When the state is switched to the state and the maximum determination process is executed again and it is determined that the maximum determination process can be set, the upper limit power amount of the charging unit to be set is set to the maximum supply power amount for each charging unit. Both charging system that is characterized in that switching the charging path of the charging unit energized.

(C) Priorities are set lower for vehicles that can be charged following the change in the upper limit power amount than vehicles that cannot be charged following the change, and the charge control unit cannot be set in the maximum determination process. Change determination that determines whether there is a vehicle that can be charged following the change in the upper limit electric energy among the vehicles that are charged by charging units other than the charging unit that is the setting target. processing is executed, charging system that is characterized in that switching the charging path of the charging unit for the vehicle and be charged in a non-energized state when the non-rechargeable vehicle to follow the change decision there.

  DESCRIPTION OF SYMBOLS 10A-10C ... Vehicle, 11 ... Storage battery, 16A-16C ... Charging stand, 18 ... Electric power supply part, 20 ... Main control part, 23 ... Sub control part, K ... Charging system, L1 ... Power line, MC ... Electromagnetic contactor.

Claims (3)

In a charging system comprising: a plurality of charging units that supply power for charging a storage battery mounted on a vehicle to the vehicle; and a power supply unit that supplies externally supplied power to each charging unit.
A switching device for switching a charging path for supplying power to the vehicle between each charging unit between an energized state and a non-energized state;
A determination unit for determining whether or not the charging unit is in a state in which the vehicle can be charged; and
A charge control unit for controlling charging,
The charging control unit sets an upper limit power amount that is an upper limit of the amount of power that each charging unit supplies to the vehicle, and the total of the upper limit power amount does not exceed the maximum supply power amount of the entire system, and Set the upper limit power amount of each charging unit so that the upper limit power amount of the charging unit does not exceed the maximum supply power amount for each charging unit,
The charging control unit determines whether the upper limit power amount can be set to the maximum power supply amount for each charging unit when the number of charging units determined to be in a chargeable state by the determination unit increases. , Performing a maximum determination process that is determined based on the total upper limit power amount of each charging unit and the maximum power supply amount of the entire system,
When it is determined that setting is possible in the maximum determination process, the upper limit power amount of the charging unit determined to be in a newly chargeable state is set to the maximum supply power amount for each charging unit and the charging unit Switch the charging path to the energized state ,
If it is determined in the maximum determination process that setting is impossible, a charging unit other than the charging unit determined to be in a newly chargeable state follows the change in the upper limit electric energy in the vehicle to be charged. Change determination processing to determine whether there is a vehicle that can be recharged,
When there is a vehicle that can be recharged in the change determination process, the charging unit that is newly determined to be in a chargeable state is reduced by reducing the upper limit electric energy of the charging unit that is charged for the vehicle. A charging system, wherein an upper limit electric energy is set to a maximum supply electric energy for each charging unit and a charging path of the charging unit is switched to an energized state . The charging control unit is a vehicle capable of performing the change determination process on a vehicle to be charged by a charging unit that is determined to be in a newly chargeable state, and charging in accordance with the change determination process. If it is determined that there is, a leveling process for leveling the upper limit power amount of the charging unit determined to be in a newly chargeable state and the upper limit power amount of the charging unit in which the upper limit power amount is reduced is executed. The charging system according to claim 1 . In a charging system comprising: a plurality of charging units that supply power for charging a storage battery mounted on a vehicle to the vehicle; and a power supply unit that supplies externally supplied power to each charging unit.
A switching device for switching a charging path for supplying power to the vehicle between each charging unit between an energized state and a non-energized state;
A determination unit for determining whether or not the charging unit is in a state in which the vehicle can be charged; and
A charge control unit for controlling charging,
The charging control unit sets an upper limit power amount that is an upper limit of the amount of power that each charging unit supplies to the vehicle, and the total of the upper limit power amount does not exceed the maximum supply power amount of the entire system, and Set the upper limit power amount of each charging unit so that the upper limit power amount of the charging unit does not exceed the maximum supply power amount for each charging unit,
The charging control unit determines whether the upper limit power amount can be set to the maximum power supply amount for each charging unit when the number of charging units determined to be in a chargeable state by the determination unit increases. , Performing a maximum determination process that is determined based on the total upper limit power amount of each charging unit and the maximum power supply amount of the entire system,
When it is determined that setting is possible in the maximum determination process, the upper limit power amount of the charging unit determined to be in a newly chargeable state is set to the maximum supply power amount for each charging unit and the charging unit Switch the charging path to the energized state,
If it is determined in the maximum determination process that setting is impossible, a charging unit other than the charging unit determined to be in a newly chargeable state follows the change in the upper limit electric energy in the vehicle to be charged. Change determination processing to determine whether there is a vehicle that can be recharged,
When there is a vehicle that cannot be recharged following in the change determination process, the charging path of the charging unit for charging the vehicle is switched to a non-energized state and the maximum determination process is performed again. If it is determined that it can be set, the upper limit power amount of the charging unit determined to be in a newly chargeable state is set to the maximum power supply amount for each charging unit and the charging path of the charging unit is energized charging systems that wherein the switching state.