JP2013207904A - Sharing charging method and system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sharing charging method that prevents the total of electric power supplied to respective vehicles from exceeding the maximum usable electric power of charging facilities even when a vehicle charged according to a suppliable electric power value transmitted from power reception facilities and a vehicle charged without reference to the suppliable electric power value transmitted from the power reception facilities are both present.SOLUTION: A charging amount control section 9 in power reception facilities 3 calculates, as suppliable electric power values Xa, amounts of charging by which respective vehicles 10 can be supplied with electric power from the power reception facilities 3 on the basis of the numbers of vehicles 10 connected to respective charging stations 2. Vehicles which can be brought under charging control among the vehicles 10 are informed of the suppliable electric power values Xa from the power reception facilities 3, and are started to be charged by corresponding charging amounts. The charging amount control section 9 supplies electric power to the respective charging stations 2 which charge the vehicles which can be brought under the charging control by charging amounts corresponding to the suppliable electric power values Xa respectively, and allocates charging amounts Xb corresponding to the number of vehicles which cannot be brought under the charging control on a time-division basis to respective charging stations 2 which charge the vehicles which cannot be brought under the charging control to supply electric power.

Description

  The present invention relates to a sharing charging system that supplies power to a plurality of vehicles from one power receiving facility.

  In recent years, plug-in hybrid vehicles and EV vehicles (electric vehicles: electric vehicles) have been rapidly developed (hereinafter referred to as “EV vehicles etc.” or simply “vehicles”), charging stations for charging vehicles and home charging. Widespread use of chargers and other charging stations.

A user of such a vehicle connects the vehicle with a charging cable to a charging stand installed at the charging station, and charges the storage battery of the vehicle.
Or recently, non-contact charging technology that enables charging of a vehicle without connecting a charging cable by simply moving the vehicle over a non-contact charger connected to a charging station and embedded in the ground, etc. It is being put into practical use.

  Here, the operator of the charging station installs a plurality of charging stations in order to perform efficient management. The operator operates a charging station by connecting a power contract with a specified capacity with a power company, and a main breaker is installed in a power receiving facility that supplies power to a charging station.

  In such a case, when a plurality of vehicles charge from the charging station, it is necessary to prevent the total amount of power used for charging each vehicle from exceeding the contracted power amount set for the main breaker. If the total power consumption exceeds the contracted power consumption, the main breaker of the charging station will be dropped, which will have a major impact on users and operators.

  Therefore, when a plurality of charging stations are operated at the charging station, a sharing charging technique is required that charges efficiently while sharing electric power from the plurality of charging stations to each vehicle.

  As a prior art of the sharing charging system, for example, there is one that supplies electric power for charging a storage battery to a plurality of automatic guided vehicles from one power receiving facility (for example, a technique described in Patent Document 1). In this sharing charging system, the power supplied to each automatic guided vehicle is changed so that the sum of the power supplied to each automatic guided vehicle does not exceed the maximum usable power of the power receiving facility.

  Moreover, as another prior art of the sharing charging system, for example, there is one that supplies electric power for charging a storage battery to a plurality of electric vehicles from one power receiving facility (for example, a technology described in Patent Document 2). In this sharing charging system, electric power is supplied to each electric vehicle in a time-sharing manner.

  However, in any of the above-described sharing charging systems, a vehicle that performs charging according to the suppliable power value transmitted from the power receiving facility and a vehicle that performs charging according to the suppliable power value transmitted from the power receiving facility are mixed. In this case, there is a problem that the sum of the electric power supplied to each vehicle exceeds the usable electric power of the power receiving facility, and the power receiving facility may be broken.

JP 2004-229355 A JP-A-5-336673

  Even if a vehicle that performs charging according to the suppliable power value transmitted from the power receiving facility and a vehicle that performs charging without complying with the suppliable power value transmitted from the power receiving facility are mixed, the present invention It is an object of the present invention to provide a sharing charging system capable of preventing the total sum of electric powers from exceeding the maximum usable electric power of the charging facility.

  In one example, a sharing charging method using a plurality of charging stations for charging a vehicle and a power receiving facility for supplying power to the plurality of charging stations, respectively, is electrically connected to each charging station. Based on the number of vehicles, the amount of charge that can be supplied to each vehicle from the power receiving facility is calculated as the amount of charge that can be supplied. , The chargeable amount of charge is notified and charging is started at the amount of charge corresponding to the available chargeable amount, and predetermined charging is performed on vehicles that cannot be controlled among the vehicles electrically connected to each charging station. Charging is started at a certain amount, and the charging amount corresponding to the amount of charge that can be supplied is supplied to each charging station that charges a vehicle that can be charged from the receiving facility, and charging control is not possible from the receiving facility Supplied by assigning a time the charge quantity split corresponding to the number of vehicles that can not be its charging control for each charging station for charging a vehicle.

  According to the present invention, in a sharing charging system that supplies power to a plurality of vehicles from one power receiving facility, a vehicle that performs charging according to a suppliable power value transmitted from the power receiving facility, and a supply that can be transmitted from the power receiving facility Even when vehicles that charge without following the power value coexist, it is possible to prevent the sum of the power supplied to each vehicle from exceeding the maximum usable power of the charging facility.

It is a figure which shows the sharing charge system of the 1st Embodiment of this invention. It is a flowchart for demonstrating operation | movement of the sharing charge system of embodiment. (A) is a figure which shows a sharing charge system when only a vehicle in which charge control is possible is connected to a charge stand, (b) is a vehicle in which charge control is possible and a vehicle incapable of charge control are mixed and connected to the charge stand It is a figure which shows the sharing charge system at the time of being carried out. It is a figure which shows the example (the 1) of a charge control process when a vehicle in which charge control is possible, and a vehicle in which charge control is impossible are mixed and connected to a charging stand. It is a figure which shows the example (the 2) of a charge control process when a vehicle in which charge control is possible, and a vehicle in which charge control is impossible are mixed and connected to a charging stand. It is a figure which shows the example (the 3) of a charge control process when a vehicle in which charge control is possible, and a vehicle in which charge control is impossible are mixed and connected to a charging stand. It is a figure which shows the sharing charge system of the 2nd Embodiment of this invention.

FIG. 1 is a diagram showing a sharing charging system according to a first embodiment of the present invention.
A sharing charging system 1 shown in FIG. 1 includes a plurality of charging stations 2 and a power receiving facility 3 that supplies power to the charging stations 2.

Each charging stand 2 includes a control unit 4, a communication unit 5, a blocking unit 6, and a power measurement unit 7.
The power receiving facility 3 includes a power supply unit 8 (power supply unit) that supplies power to each charging station 2 and a charge amount control unit 9 (charge amount control unit).

  When a vehicle 10 such as an electric vehicle or a plug-in hybrid vehicle and the charging stand 2 are connected via a charging cable and charging is started according to an instruction from a user (driver), the charging control unit 12 in the vehicle 10 A charge power instruction is given to the power storage unit 11 in the apparatus 10. When the power storage unit 11 pulls power from the charging stand 2 based on the charging power instruction, power is supplied from the power supply unit 8 of the power receiving facility 3 to the power storage unit 11 of the vehicle 10 via the blocking unit 6 of the charging stand 2. A storage battery (not shown) mounted on the vehicle 10 is charged.

As types of the vehicle 10, there are a vehicle capable of charge control (hereinafter referred to as “vehicle capable of charge control”) and a vehicle capable of charge control (hereinafter referred to as “vehicle not capable of charge control”).
The charge controllable vehicle includes a communication unit 13, and when the vehicle 10 is connected to the charging stand 2, the communication unit 13 receives a suppliable power value Xa transmitted from the communication unit 5 of the charging stand 2. . In addition, the communication unit 13 sends the received suppliable power value Xa to the charging control unit 12, and the charging control unit 12 gives a charging power instruction indicating the suppliable power value Xa to the power storage unit 11. As a result, the storage battery of the charge-controllable vehicle is charged with power corresponding to the suppliable power value Xa transmitted from the charging stand 2. For example, the communication units 5 and 13 notify the suppliable power value Xa from the charging station 2 to the charge controllable vehicle using a control pilot (CPLT) signal transmitted on the charging cable. Alternatively, the communication units 5 and 13 notify, for example, the suppliable power value Xa superimposed on the wireless communication signal. The wireless communication signal is, for example, a WiFi (Wireless Fidelity) communication system that is certified by the industry group WiFi Alliance and conforms to the IEEE 802.11 communication standard.

  In the above-described configuration, the suppliable power value Xa is notified from the charging station 2 to the vehicle that can be charged. However, what is notified is not limited to the power value, and the suppliable charge amount is As long as it is shown, it may be a current value or a voltage value.

  The vehicle incapable of charge control does not include the communication unit 13 and cannot receive the suppliable power value Xa transmitted from the charging station 2. Therefore, the electric power drawn from the charging station 2 to the vehicle that cannot be charged cannot be controlled by the suppliable electric power value Xa transmitted from the charging station 2. That is, the vehicle incapable of charge control charges the storage battery without following the suppliable power value Xa transmitted from the charging station 2. Therefore, as described above, the sum of the power supplied to each vehicle 10 may exceed the available power X of the power receiving facility 3. For example, if the available power X of the power receiving facility 3 is 100 W and five vehicles 10 are connected to the charging stand 2, 100 W is distributed if all the five vehicles 10 are vehicles that can be charged. In addition, since the storage battery of each vehicle 10 can be charged with 20 W of power, the total power supplied to each vehicle 10 does not exceed the usable power X of the power receiving facility 3. However, if one or more of the five vehicles 10 are vehicles that can be controlled for charging, and the vehicles that cannot be controlled for charging charge storage batteries with a power higher than 20 W, the power supplied to each vehicle 10 The sum exceeds the usable power X of the power receiving facility 3.

  Therefore, in the sharing charging system 1 of the present embodiment, when a vehicle that can be charged and a vehicle that cannot be charged are connected to the charging stand 2 in a mixed manner, the vehicle is pulled from the vehicle that can be charged and the vehicle that cannot be charged. The usable power X is temporally distributed while supplying the usable power X to vehicles that can be controlled for charging or vehicles that cannot be controlled for charging so that the total sum of the generated power does not exceed the usable power X of the power receiving equipment 3. And is supplied to vehicles capable of charge control and vehicles that cannot charge control.

In the above-described configuration, the charge amount control unit 9 corresponds to a supplyable charge amount calculation unit and a charge amount control unit, and the control unit 4, the communication unit 5, and the communication unit 13 correspond to a supplyable charge amount notification unit.
FIG. 2 is a flowchart for explaining the operation of the sharing charging system 1 in the case where a vehicle that can be charged and a vehicle that cannot be charged are mixed and connected to the charging station 2.

  First, when a signal indicating that charging of the vehicle 10 is being performed from any one of the plurality of charging stations 2 to the power receiving facility 3 (Yes in S1), the power receiving facility 3 The power supply unit 8 sends a signal indicating the usable power X to the charge amount control unit 9 (S2). The charge amount control unit 9 stops all the power supply to each charging station 2 other than the charging station 2 where the vehicle 10 starts to be newly charged, and uses the available power X of the power supply unit 8 to each current charging station. 2 is divided by the total number N of vehicles 10 that are being charged, and the calculation result X / N is the power value that can be supplied per vehicle 10 that each charging station 2 is currently charging (suppliable power). Value) Xa. For example, when the usable power X of the power supply unit 8 is 100 W and the five vehicles 10 are charging at each charging stand 2, the suppliable power value Xa per vehicle 10 is 20 W. The above-described method for calculating the suppliable power value Xa is an example, and is not limited to this and can be set arbitrarily.

Next, the charge amount control unit 9 transmits the calculated suppliable power value Xa to the control unit 4 of the charging station 2 where the vehicle 10 newly starts charging (S3).
Next, the control unit 4 of the charging station 2 at which the vehicle 10 newly starts charging transmits the received suppliable power value Xa to the vehicle 10 that is being charged via the communication unit 5 ( S4).

  Next, when the communication unit 13 is provided in the new vehicle 10, the charging control unit 12 of the vehicle 10 indicates a charging power instruction (current or voltage) indicating that the storage battery is charged with the received suppliable power value Xa. May be an instruction) to the power storage unit 11 to start charging the storage battery (S5). When the communication unit 13 is not provided in the new vehicle 10, when the vehicle 10 starts charging at the charging stand 2, the charging control unit 12 has a preset power value (current or voltage value). The charging power instruction for charging the storage battery is issued to the power storage unit 11 and charging of the storage battery is started.

  Next, the power measuring unit 7 of the charging station 2 at which the vehicle 10 newly starts charging measures the power drawn from the power supply unit 8 to the vehicle 10 (S6), and sends the measured power to the control unit 4. (S7).

  Next, based on the power measured by the power measurement unit 7 and the suppliable power value Xa transmitted to the vehicle 10, the control unit 4 can control the vehicle that is charging the vehicle 10 that can be charged and It is determined whether the vehicle is one incapable of charge control, and the determination result is transmitted to the charge amount control unit 9 of the power receiving facility 3 (S8).

  For example, when the power measured by the power measuring unit 7 is approximately equal to the suppliable power value Xa, the control unit 4 may pull the power based on the suppliable power value Xa from the power supplying unit 8. When it is determined that the vehicle is a chargeable vehicle that can be charged and the power measured by the power measuring unit 7 is different from the suppliable power value Xa, the new vehicle 10 supplies power that is not based on the suppliable power value Xa. It is determined that the vehicle cannot be charged and is pulled from 8. The control unit 4 determines that the new vehicle 10 is a charge-controllable vehicle when the power measured by the power measurement unit 7 is less than or equal to the suppliable power value Xa, and is measured by the power measurement unit 7. When the electric power is larger than the suppliable electric power value Xa, the new vehicle 10 may be determined to be a vehicle incapable of charge control.

  Whether the vehicle is a charge-controllable vehicle or a vehicle that is not charge-controllable is identified by other identifying means such as a determination of a control signal (for example, a CPLT signal) between the charging station and the vehicle 10. It may be.

  The charge amount control unit 9 of the power receiving facility 3 then determines the determination result of the control unit 4 of the charging stand 2 where the vehicle 10 newly starts charging or the control unit 4 of the charging stand 2 where the vehicle 10 started charging in the past. Based on the determination result, power is supplied to the vehicle 10 that is currently charging each charging station 2 (S9).

  As basic control in this case, the charging amount (power, current, voltage) corresponding to the suppliable electric power value Xa is set for each charging station 2 that charges the vehicle that can be charged from the power receiving facility 3. Supplied. In addition, the charging amount corresponding to the number of vehicles that cannot be charged is allocated and supplied to each charging station 2 that charges vehicles that cannot be charged from the power receiving facility 3 in a time-sharing manner.

  For example, when the charge amount control unit 9 determines that all the vehicles 10 that are charged by the respective charging stands 2 are charge controllable vehicles based on the respective determination results, as shown in FIG. The available power X is divided by the total number N1 of charge controllable vehicles, and the amount of power corresponding to the calculation result X / N1 is supplied to each charging station 2 where the charge controllable vehicle charges. That is, when it is determined that each charging station 2 is charging only a vehicle that can be charged, the charge amount control unit 9 supplies the available power X evenly distributed to each vehicle that can be charged. That is, this electric energy is equal to the suppliable power value Xa.

  For example, as shown in FIG. 3B, the charge amount control unit 9 is charged with a mixture of vehicles that can be controlled for charging and vehicles that cannot be controlled for charging as shown in FIG. 4, as shown in FIG. 4, the charging amount (power, current, voltage) corresponding to the suppliable power value Xa for each charging station 2 that charges the vehicle capable of charge control from the power receiving facility 3. Are supplied respectively. In addition, each charging station 2 that charges vehicles that cannot be charged from the power receiving facility 3 is supplied with a charge amount Xb corresponding to the number of vehicles that cannot be charged in a time-sharing manner. The That is, for example, the charge amount control unit 9 is based on each determination result, as shown in FIG. When the determination is made, as shown in FIG. 5, the power Xb is supplied in order for each of the N2 non-chargeable vehicles, and the power corresponding to the suppliable power value Xa is distributed to each chargeable vehicle. Supply. In addition, as shown in FIG. 6, the available power X is distributed and supplied to each charge-controllable vehicle, and the total sum of power drawn from each charge-control impossible vehicle does not exceed the usable power X. Distributing and supplying the usable power X to the vehicles that cannot be charged may be alternately repeated. For example, if the total power drawn from N2 non-controllable vehicles exceeds the usable power X at time T2 shown in FIG. 6, the usable power among N2 non-controllable vehicles. After charging the storage batteries of vehicles that cannot be controlled to charge that does not exceed X, the remaining storage batteries of vehicles that cannot be controlled to charge may be charged at the next time T4.

Here, the charging of all the storage batteries of the N1 charge-controllable vehicles may be completed before the charging of all the storage batteries of the N2 charge-controllable vehicles is completed.
As described above, in the sharing charging system 1 of the present embodiment, when it is determined that the charging controllable vehicle and the charging impossible vehicle are mixedly connected to each charging stand 2, the charge controllable vehicle and the charging control are performed. Charging the usable power X while supplying the usable power X to the charge-controllable vehicle or the vehicle that cannot be charge-controlled so that the total power drawn from the impossible vehicle does not exceed the usable power X It is distributed in time to vehicles that can be controlled and vehicles that cannot be charged. As a result, even when vehicles capable of charge control and vehicles not charge-controllable are connected to each charging station 2, the sum of the power supplied to each vehicle 10 becomes the usable power X of the power receiving facility 3. It is possible to control so as not to exceed.

  FIG. 7 is a diagram showing a sharing charging system according to the second embodiment of the present invention. In the configuration of FIG. 7, parts having the same functions as those in the configuration of FIG. 1 according to the first embodiment are denoted by the same reference numerals. The configuration of FIG. 7 is different from the configuration of FIG. 1 in that charging from the charging station 2 to the vehicle 10 is performed not by a charging cable but by a non-contact charging method based on the principle of electromagnetic induction or the principle of resonance. is there. In order to carry out this non-contact charging, for example, the charging stand 2 is configured to be embedded in the ground where the vehicle 10 can stop. Then, the power supplied from the power supply unit 8 in the power receiving facility 3 to the charging station 2 is transmitted from the non-contact charging unit 100 in the charging station 2 to the non-contact charging unit 101 in the vehicle 10 stopped above. The In the vehicle 10, the power received by the non-contact charging unit 101 is charged to a storage battery (not shown) via the power storage unit 11. In the configuration of FIG. 7, the communication unit 13 in the charging station 2 and the communication unit 13 in the vehicle 10 which is a vehicle capable of charging control, for example, notify the suppliable power value Xa superimposed on the wireless communication signal. To do. The wireless communication signal is, for example, a WiFi communication method.

  With the configuration of the second embodiment described above, even in the sharing charging system adopting the non-contact charging method, as in the case of the first embodiment, each charging stand 2 can be charged with a vehicle whose charging can be controlled and charging control is impossible. Even when vehicles are mixed and connected, it is possible to control so that the total sum of the power supplied to each vehicle 10 does not exceed the usable power X of the power receiving facility 3.

  In the first or second embodiment described above, when another vehicle starts a new charge, there is a possibility that the usable electric energy may be exceeded momentarily. When the start of new charging is confirmed, when power is distributed (in the case of control for a vehicle that can be charged), it is possible to determine whether the vehicle can be controlled by charging or the vehicle that cannot be controlled by reducing the chargeable amount. . The chargeable charge amount at that time can be within the usable power amount range. When the time is dispersed (in the case of control for a vehicle that cannot be charged), it is possible to determine whether the vehicle is capable of charge control / the vehicle that cannot be charged by stopping charging once.

DESCRIPTION OF SYMBOLS 1 Sharing charge system 2 Charging stand 3 Power receiving equipment 4 Control part 5 Communication part 6 Blocking part 7 Electric power measurement part 8 Electric power supply part 9 Charge amount control part 10 Vehicle 11 Power storage part 12 Charge control part 13 Communication part 100, 101 Non-contact Charging part

Claims (10)

A sharing charging method using a plurality of charging stations each for charging a vehicle and a power receiving facility for supplying power to each of the plurality of charging stations,
Based on the number of each vehicle electrically connected to each charging station, the amount of charge that can be supplied to each vehicle from the power receiving facility is calculated as a chargeable charge amount,
Among vehicles electrically connected to each charging station, vehicles capable of charge control are notified of the chargeable charge amount to start charging with a charge amount corresponding to the chargeable charge amount,
In vehicles that are not electrically chargeable among vehicles electrically connected to each charging station, start charging with a predetermined charge amount,
A charging amount corresponding to the chargeable charge amount is supplied to each charging station that charges the vehicle capable of charge control from the power receiving facility, and the vehicle that cannot perform the charge control is charged from the power receiving facility. A charge amount corresponding to the number of vehicles for which the charge control is impossible is allocated to each charging station for performing the time-division supply.
A sharing charging method characterized by that. Measure each charge amount of any one or more of each power, voltage, or current being charged to each vehicle connected to each charging station, and measure each charge amount and the supply possible Identifying whether a vehicle connected to each charging station is a vehicle capable of the charge control or a vehicle capable of the charge control based on a magnitude relationship with a charge amount;
The sharing charging method according to claim 1, wherein: Charging the vehicle from the charging stand via a charging cable,
For the vehicle capable of charge control from the charging stand, the controllable pilot signal transmitted over the charging cable is superimposed on the amount of charge that can be supplied,
The sharing charging method according to claim 1, wherein the sharing charging method is performed. Charging the vehicle from the charging stand via a charging cable,
For the vehicle capable of charge control, the amount of charge that can be supplied is notified by being superimposed on a wireless communication signal.
The sharing charging method according to claim 1, wherein the sharing charging method is performed. Charge the vehicle from the charging stand in a non-contact charging manner,
For the vehicle capable of charge control, the amount of charge that can be supplied is notified by being superimposed on a wireless communication signal.
The sharing charging method according to claim 1, wherein the sharing charging method is performed. A sharing charging system comprising a plurality of charging stations each for charging a vehicle, and a power receiving facility for supplying power to each of the plurality of charging stations,
A chargeable charge amount calculating unit that calculates a chargeable amount that can be supplied from the power receiving facility to each vehicle based on the number of vehicles that are electrically connected to the charging stations;
Supply capable of notifying the supplyable charge amount and starting charging at a charge amount corresponding to the supplyable charge amount to vehicles capable of charge control among vehicles electrically connected to the charging stations. Charge amount notification unit;
A charging amount corresponding to the chargeable charge amount is supplied to each charging station that charges the vehicle capable of charge control from the power receiving facility, and the vehicle that cannot perform the charge control is charged from the power receiving facility. A charge amount control unit that allocates and supplies, in a time-sharing manner, a charge amount corresponding to the number of vehicles in which the charge control is impossible for each charging station,
A sharing charging system characterized by comprising:   Measure each charge amount of any one or more of each power, voltage, or current being charged to each vehicle connected to each charging station, and measure each charge amount and the supply possible A vehicle identification unit for identifying whether a vehicle connected to each charging station is a vehicle that can perform the charging control or a vehicle that cannot perform the charging control based on a magnitude relationship with a charge amount The sharing charging system according to claim 6. Charging the vehicle from the charging stand via a charging cable,
The supplyable charge amount notification unit notifies the vehicle of chargeable control from the charging stand, the supplyable charge amount superimposed on a control pilot signal transmitted on the charging cable,
The sharing charging system according to claim 6, wherein the sharing charging system is provided. Charging the vehicle from the charging stand via a charging cable,
The supplyable charge amount notification unit notifies the vehicle of chargeable control with the supplyable charge amount superimposed on a wireless communication signal.
The sharing charging system according to claim 6, wherein the sharing charging system is provided. The vehicle from the charging stand is charged by a non-contact charging method,
The supplyable charge amount notification unit notifies the vehicle of chargeable control with the supplyable charge amount superimposed on a wireless communication signal.
The sharing charging system according to claim 6, wherein the sharing charging system is provided.