JP2013141360A - Charging system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control a total supply of electrical energy from a charging section within a maximum supply of electrical energy even if a communication blackout occurs between the charging section and a charge control section.SOLUTION: A charge control section 18 and charging stands 15A, 15B store a blackout setting value (preset value) as a current command value in case of blackout of communication by communication sections 20, 21A, 21B. In the event of a blackout of communication by the communication sections 20, 21A, 21B, the charging stand with the communication blackout continues charging on the basis of the blackout setting value. The charge control section 18, on the other hand, decides a current command value such that the charging stand without any communication blackout supplies the electrical energy that is the remainder of the subtraction of a supply of electrical energy based on the blackout setting value from a maximum supply of electrical energy. The charge control section 18 can thus implement current control of each charging stand 15A, 15B even in the event of a communication blackout.

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. In the charging system of Patent Document 1, even when a plurality of vehicles are charged at the same time, the charging is controlled so as not to exceed the contracted capacity. Specifically, when the amount of charging power exceeds a predetermined threshold, control is performed to reduce the amount of charging power supplied to the vehicle.

JP 2011-125178 A

  By the way, the above-described control can be accurately executed when transmission / reception of an instruction signal is established between the control unit and a charging unit that performs charging in response to an instruction from the control unit. However, if the communication between the control unit and the charging unit is interrupted due to some factor, there is a possibility that the control of the charging power amount cannot be performed on the control unit side.

  The present invention has been made paying attention to such problems existing in the prior art, and its purpose is to charge even if communication interruption occurs between the charging control unit and the charging unit. It is in providing the charging system which can be controlled so that the sum total of the electric energy which a part supplies becomes below the maximum supply electric energy.

  In order to solve the above-mentioned problems, the invention according to claim 1 is a charging system for charging a storage battery mounted on a vehicle, wherein the vehicle is supplied with electric power for charging the storage battery mounted on the vehicle. A plurality of charging units to be supplied, a power supply unit that receives externally supplied power and distributes the received power to each charging unit, and the total amount of power supplied by each charging unit is less than or equal to the maximum supply power amount A charging control unit for controlling the power for charging so as to be, and a communication unit for transmitting and receiving signals between the charging control unit and the charging unit, the charging control unit is a predetermined amount from each charging unit A charging command value for supplying the charging power is transmitted to the charging unit via the communication unit, and the charging command value is transmitted to at least one of the charging control unit and the charging unit. Is communicated by the communication unit. When the communication is interrupted, a setting value for interruption is stored as a charge command value for supplying a predetermined amount of charging power from the charging unit where communication is interrupted. The interrupted charging unit performs charging based on the setting value for interruption, while the charging control unit performs subtraction after subtracting the amount of power supplied based on the setting value for interruption from the maximum supply power amount. The gist is to determine the charging command value so that the amount of electric power is supplied by a charging unit that is not disconnected, and to transmit the determined charging command value to the charging unit that is not disconnected.

  According to this, the charging control unit determines the charging command value so that the total amount of power supplied by each charging unit is equal to or less than the maximum supplied power when communication interruption with the charging unit has not occurred. In addition, the amount of power can be controlled by instructing each charging unit with the determined charging command value. On the other hand, when a communication interruption occurs between the charging unit and the charging unit, the charging command value of the charging unit in which the communication interruption has occurred is set as a setting value for interruption, so that the charging unit in which the communication interruption has occurred and It is possible to control the amount of power of each charging unit in which communication interruption has not occurred. That is, the charging control unit determines the charging command value so that the subtracted power amount obtained by subtracting the amount of power supplied based on the set value for interruption from the maximum supply power amount is supplied by the charging unit that is not disconnected. By doing so, the total amount of power supplied by each charging unit can be controlled to be equal to or less than the maximum amount of power supplied.

  A second aspect of the present invention is the charging system according to the first aspect, further comprising an input unit that inputs the maximum power supply amount and the number of the charging units, and the charge control unit includes the maximum power supply amount and When the input operation of at least one of the number of charging units is performed, the setting value for interruption is determined and the setting value for interruption is transmitted to each charging unit via the communication unit This is the gist.

  According to this, when a communication interruption occurs because the charging control unit determines the setting value for interruption and transmits it to each charging unit when an input operation of the maximum amount of power supply or the number of charging units is performed The control according to the configuration of the charging system at the time of the occurrence can be executed. As a result, it is possible to suppress a decrease in charging efficiency when communication is interrupted. Note that the maximum input power amount and the number of charging units are input at the initial stage when the system is initially introduced, and are also input when the system configuration is changed after the introduction.

  According to a third aspect of the present invention, in the charging system according to the second aspect, the charging control unit has a charging command value for supplying an electric energy obtained by dividing the maximum supplied electric energy by the number of the charging units. The gist is to determine the set value for interruption.

  According to this, it is possible to suppress a bias such that the set value for interruption is extremely large or small. In other words, it is possible to suppress the charging command value of the charging unit in which communication interruption has not occurred from becoming extremely large or small. Therefore, it is possible to suppress a decrease in charging efficiency when communication is interrupted.

  According to a fourth aspect of the present invention, in the charging system according to the first aspect, each of the charging units is provided with a power cut-off unit that cuts off a current flow when an overcurrent flows. The gist of the hourly set value is set to the maximum allowable value of the power cut-off unit.

  According to this, since the set value for interruption is determined to be the maximum allowable value of the power cut-off unit, the process for determining the set value for interruption can be omitted, and the control configuration can be simplified. .

  According to the present invention, even when communication interruption occurs between the charging control unit and the charging unit, the total amount of power supplied by the charging unit can be controlled to be equal to or less than the maximum supplied power amount. .

The block diagram which shows the structure of a charging system. The flowchart which shows a prior setting process. The flowchart which shows a process at the time of communication interruption. (A) is a schematic diagram which shows the aspect of the current control at the time of normal, (b) is a schematic diagram which shows the aspect of the current control at the time of communication interruption. Explanatory drawing explaining another example.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, vehicles 10A and 10B such as EVs and PHVs are equipped with storage batteries 11A and 11B that store power supplied to an electric motor (motor) (not shown) that serves as a prime mover of the vehicles 10A and 10B. Moreover, vehicle control part 12A, 12B which controls charge to storage battery 11A, 11B is mounted in vehicle 10A, 10B. Moreover, power converters AA and BB are mounted on the vehicles 10A and 10B. The storage batteries 11A and 11B of the vehicles 10A and 10B are charged with the power supplied from the vehicle charging system K by the power converters AA and BB, and the converted power. The vehicles 10A and 10B are equipped with information receiving units and communication units 13A and 13B serving as information transmitting units.

Hereinafter, a specific configuration of the charging system K will be described with reference to FIG.
Charging system K is connected to power receiving facility 14 that receives power transmitted from the power system, and to power receiving facility 14, and is connected to vehicles 10A and 10B via charging plug P when charging vehicles 10A and 10B. It consists of charging stands 15A and 15B. Charging stands 15A and 15B serve as charging units that supply power to charge storage batteries 11A and 11B of vehicles 10A and 10B. In addition, a load facility to which power is supplied from the power receiving facility 14 is connected to the power receiving facility 14. The load facility is an object to which electric power is supplied by the power receiving facility 14 such as a lighting stand 15A, 15B or a lighting fixture provided at a place where the charging system K is installed.

  In FIG. 1, for convenience of explanation, two charging stations 15A and 15B connected to the power receiving facility 14 are illustrated, and other load facilities are not illustrated. 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. And the power receiving equipment 14 and charging stand 15A, 15B are connected by the power line L1 and the signal line L2.

  The power receiving facility 14 includes a power supply unit 16 that supplies power received from the power system to the charging stations 15A and 15B, and a power measuring unit 17 that measures the amount of power supplied to the charging stations 15A and 15B. ing. The power received from the power system becomes the power supplied from the outside. The power measuring unit 17 also measures a current value and a voltage value. Further, the power receiving facility 14 is provided with a charge control unit 18 that instructs a current command value for charging when charging the storage batteries 11A and 11B of the vehicles 10A and 10B. The current command value is a charge command value for supplying a predetermined amount of charging power from each of the charging stations 15A and 15B. Further, the power receiving facility 14 is provided with a communication unit 20 serving as an information transmission unit and an information reception unit.

  In addition, an input unit 24 for setting a peak power set value (maximum supply power amount) Px and the number of stands N is connected to the charge control unit 18 of the power receiving facility 14 by an input operation of the installer. The peak power setting value Px is a value indicating the maximum amount of power supplied that is the sum of the amounts of power supplied by the charging stations 15A and 15B. The number N of stands is the number (number) of charging stations to which the power receiving facility 14 supplies power.

  Each charging station 15A, 15B is provided with a communication unit 21A, 21B serving as an information transmission unit and an information reception unit. Each charging stand 15A, 15B is provided with storage units 22A, 22B for storing information received by the communication units 21A, 21B. Each charging stand 15A, 15B is provided with power interrupting portions 23A, 23B that interrupt the flow of current when an overcurrent flows. Each electric power interruption | blocking part 23A, 23B interrupts | blocks the flow of the electric current between the power receiving installation 14 and vehicle 10A, 10B. The overcurrent is a current that exceeds the maximum current value allowed by the power cut-off units 23A and 23B. Further, the third and subsequent charging stations connected to the power receiving facility 14 also include a communication unit, a storage unit, and a power cut-off unit, similarly to the charging stations 15A and 15B.

  In the charging system K of the present embodiment, the charging control unit 18 determines a current command value that is instructed to the charging stations 15A and 15B to which the vehicles 10A and 10B to be charged are connected. At this time, the charging control unit 18 determines the current command value so that the total amount of power supplied by the charging stations 15A and 15B does not exceed the peak power setting value Px. Further, the charging control unit 18 determines the current command value in consideration of the maximum charging current value for each of the vehicles 10A and 10B. When determining the current command value, the charging control unit 18 first determines a power setting value to be distributed to the charging stations 15A and 15B. Then, the charging control unit 18 determines the current command value from the voltage value and the power setting value that are the measurement results of the power measuring unit 17.

  The maximum charging current value is a maximum current value that can be handled when the vehicle control units 12A and 12B of the vehicles 10A and 10B charge the storage batteries 11A and 11B, and this value constitutes the vehicle control units 12A and 12B. It is determined by the conversion capability of the power converter. That is, when charging the vehicles 10A and 10B, even if a current command value larger than the maximum charging current value is instructed, the vehicles 10A and 10B cannot charge based on the instructed current command value. On the other hand, when a current command value smaller than the maximum charging current value is instructed, the vehicles 10A and 10B can charge based on the instructed current command value, but the charging efficiency decreases.

  For this reason, it is preferable to determine the current command value within a range that does not exceed the peak power setting value Px and a value that matches or is close to the maximum charging current value. The current command value is likely to become a value that matches or is close to the maximum charging current value as the number of vehicles 10A and 10B to be charged simultaneously decreases, and is smaller than the maximum charging current value as the number increases. May be a value. That is, the current command value varies depending on the number of vehicles 10A and 10B to be charged and the specifications (conversion capability of the power converter). The vehicles 10A and 10B include a vehicle that can variably control the charging current value and a vehicle that uses a fixed charging current value.

  The charging control unit 18 transmits the determined current command value to the communication units 21A and 21B of the charging stations 15A and 15B through the communication unit 20. The charging stations 15B and 15B instruct the vehicle control units 12A and 12B of the vehicles 10A and 10B via the communication units 21A and 21B. The vehicle control units 12A and 12B that have received the current command value charge the storage batteries 11A and 11B based on the current command value. The power receiving facility 14 and the charging stands 15A and 15B transmit and receive signals at a predetermined time by the communication unit 20 and the communication units 21A and 21B. For example, when the vehicles 10A and 10B are connected to the charging stations 15A and 15B via the charging plug P, the communication units 21A and 21B of the charging stations 15A and 15B transmit a vehicle connection signal to the power receiving facility 14, and The communication unit 20 of the power receiving facility 14 that has received the vehicle connection signal transmits a connection confirmation signal to the charging stations 15A and 15B. In addition, when the communication unit 20 of the power receiving facility 14 starts charging, the communication unit 20 transmits a charging start signal to the charging stations 15A and 15B. Upon receiving the charging start signal, the communication units 21A and 21B of the charging stations 15A and 15B transmit the charging start signal to the vehicles 10A and 10B, and the communication units 13A and 10B of the vehicles 10A and 10B that have received the charging start signal. When 13B is ready to start charging, it transmits a charging permission signal to charging stations 15A and 15B. When the communication units 21A and 21B of the charging stations 15A and 15B receive the charging permission signal, the communication units 21A and 21B transmit the charging permission signal to the power receiving facility 14.

  In this way, the power receiving facility 14 and the charging stations 15A and 15B can detect whether the communication state between the two is normal or the communication is interrupted by transmitting and receiving signals when an event occurs. That is, the power receiving facility 14 and the charging stations 15A and 15B detect that the communication side is interrupted when a signal that the other party responds to the transmitted signal is not received. The charging is led by the vehicles 10 </ b> A and 10 </ b> B to draw power through the power supply unit 16 of the power receiving facility 14. For this reason, the power receiving facility 14 can detect that the communication is interrupted when power is supplied from the power supply unit 16 in a state where the charging permission signal is not received.

  In the charging system K of the present embodiment, even if communication interruption between the power receiving facility 14 and the charging stations 15A and 15B occurs, the total amount of power supplied by the charging stations 15A and 15B is the peak power setting value. The current control (power control) can be executed so as not to exceed Px. Note that the charging system K of the present embodiment is configured to be able to execute current control regardless of the number of charging stations 15A and 15B that are in a communication-disrupted state, and all charging stations connected to the power receiving facility 14 are configured. Even if 15A and 15B are in a communication interruption state, it is possible to execute current control.

  In order to perform current control when communication interruption occurs, the charging control unit 18 of the power receiving facility 14 pre-sets a preset value (setting value for interruption) Pj as a charge command value used when communication interruption occurs. decide. When the peak power set value Px and the number of stands N are input through the input unit 24 during the initial introduction of the charging system K, the charge control unit 18 receives the peak power set value Px and the number of stands N through the input unit 24 after introduction. When the change is input, the preset value Pj is determined.

Hereinafter, a preset process for the charge controller 18 to determine and set the preset value Pj will be described with reference to FIG.
The charging control unit 18 acquires the peak power set value Px and the number of stands N input through the input unit 24 (step S10). The peak power set value Px and the number N of stands are set (stored) in the charge control unit 18 when input via the input unit 24. Then, the charging control unit 18 calculates a preset value Pj for communication interruption based on the peak power setting value Px and the number of stands N acquired in step S10 (step S20). In step S20, the charging control unit 18 calculates a charging power value obtained by dividing the peak power setting value Px by the number N of stands. Then, the charging control unit 18 calculates a current command value for supplying the calculated charging power value as the preset value Pj. That is, according to this calculation method, the preset value Pj is an equal value.

  Next, the charge control unit 18 that has calculated the preset value Pj in step S20 transmits a signal indicating the preset value Pj to each of the charging stations 15A and 15B (step S30). The preset value Pj calculated in step S20 is also set (stored) in the charging control unit 18. Then, when each charging station 15A, 15B receives a signal indicating the preset value Pj, the preset value Pj indicated by the signal is set and stored in the respective storage units 22A, 22B.

Next, communication interruption processing for the charge control unit 18 to perform current control when communication interruption occurs will be described with reference to FIG.
When the communication control unit 18 detects a communication interruption, the charging control unit 18 calculates a current command value of another normal charging station in consideration of causing the communication station that has lost communication to perform charging based on the preset value Pj (step S40). ). In step S40, the charging control unit 18 subtracts the charging power value when charging is performed based on the preset value Pj from the peak power setting value Px, and supplies the power amount after the subtraction at a normal charging stand. Determine the current command value of the normal charging station. Then, the charging control unit 18 transmits the current command value determined in step S40 to a normal charging station (step S50).

Next, the contents of control on the charging stand 15A, 15B side will be described.
When the charging station 15A, 15B detects a communication interruption with the power receiving facility 14, the charging station 15A, 15B transmits the preset value Pj stored and held in the storage units 22A, 22B to the vehicles 10A, 10B as a current command value. Thereby, vehicle control part 12A, 12B of vehicle 10A, 10B charges storage battery 11A, 11B with the electric current command value based on preset value Pj. On the other hand, the normal charging stations 15A and 15B that are not in communication with the power receiving facility 14 are transmitted via the communication unit 20 of the power receiving facility 14 and receive the current command value determined by the charging control unit 18. And communication part 21A, 21B of charge stand 15A, 15B which received the electric current command value transmits the received electric current command value to vehicle 10A, 10B. Thereby, vehicle control part 12A, 12B of vehicle 10A, 10B charges storage battery 11A, 11B based on an electric current command value.

  Hereinafter, the operation of the charging system K of the present embodiment will be described with reference to FIGS. 4 (a) and 4 (b). 4A and 4B illustrate the case where three charging stations 15A, 15B, and 15C are connected to the power receiving facility 14. FIG. 4A and 4B, the configuration of the power receiving facility 14 is illustrated in a simplified manner, and only the charging control unit 18 and the power supply unit 16 are illustrated.

First, a case where the communication state between the power receiving facility 14 and all the charging stations 15A to 15C is in a normal state will be described with reference to FIG.
In this case, the charging control unit 18 of the power receiving facility 14 sets each charging stand 15A so that the total amount of power supplied by each charging stand 15A to 15C (the amount of power based on the charging power value) does not exceed the peak power setting value Px. The current command value instructed to ~ 15C is determined. And the charge control part 18 transmits the determined electric current command value to each charging stand 15A-15C. Specifically, when the current control value 18 is determined as the current command value of the charging station 15A, the charging control unit 18 transmits the current command value X. Moreover, the charging control part 18 transmits the current command value Y, when the current command value Y is determined as a current command value of the charging stand 15B. Moreover, the charging control part 18 transmits the current command value Z, when the current command value Z is determined as a current command value of the charging stand 15C. The charging stations 15A, 15B, and 15C that have received these current command values X, Y, and Z transmit the current command values X, Y, and Z to the vehicles 10A, 10B, and 10C that are to be charged, respectively. Thereby, each vehicle 10A, 10B, 10C receives the electric power corresponding to charging electric power value X, Y, Z based on electric current command value X, Y, Z from electric power supply part 16, and is charged.

  Next, a case where a communication interruption state is detected as a communication state between the power receiving facility 14 and the charging stations 15A to 15C will be described with reference to FIG. FIG. 4B illustrates a case where the communication state of the charging stations 15A and 15B is normal, while the communication state of the charging station 15C is a communication interruption state.

  The charging control unit 18 of the power receiving facility 14 that has detected the communication interruption with the charging station 15C determines the charging power value when the charging is performed based on the preset value Pj set in the charging station 15C as the peak power setting value Px. Subtract from Then, the charging control unit 18 instructs the charging stations 15A and 15B so that the total amount of power supplied by the charging stations 15A and 15B in the normal communication state does not exceed the value after the previous subtraction. Determine the value. Then, the charging control unit 18 transmits the determined current command value to the charging stations 15A and 15B. Specifically, when the current control value 18 is determined as the current command value of the charging station 15A, the charging control unit 18 transmits the current command value X. Moreover, the charging control part 18 transmits the current command value Y, when the current command value Y is determined as a current command value of the charging stand 15B. The charging stations 15A and 15B that have received these current command values X and Y transmit the current command values X and Y to the vehicles 10A and 10B to be charged, respectively. As a result, the vehicles 10A and 10B are charged by receiving power corresponding to the charging power values X and Y based on the current command values X and Y from the power supply unit 16.

  On the other hand, the charging station 15C that detects the communication interruption transmits the set preset value Pj to the vehicle 10C to be charged. As a result, the vehicle 10C is charged by receiving power corresponding to the charging power value Pj based on the preset value Pj from the power supply unit 16.

  As described above, in the charging system K of the present embodiment, even when communication interruption occurs, the amount of power supplied from each charging station is controlled so as not to exceed the peak power setting value Px. That is, the charging control unit 18 can perform normal current control of the charging station after grasping the amount of power supplied from the charging station where the communication interruption has occurred. FIG. 4B illustrates the case where one charging station 15C has lost communication. However, even when a plurality of charging stations have lost communication, current control by the charging control unit 18 is the same as described above. It can be performed. That is, in the charging system K of this embodiment, since the preset value Pj of each charging station is determined, charging of normal charging stations can be performed by considering the preset value Pj of all charging stations that have lost communication. Current command value can be determined. Similarly, even when all charging stations are disconnected, it is possible to control so that the amount of power supplied from each charging station does not exceed the peak power setting value Px.

Therefore, according to the present embodiment, the following effects can be obtained.
(1) When no communication interruption has occurred, the charging control unit 18 issues a current command so that the total amount of power supplied by the charging stations 15A and 15B is equal to or less than the maximum supplied power amount (peak power setting value Px). Determine the value. And the charge control part 18 controls electric energy by instruct | indicating the determined electric current command value to each charging stand 15A, 15B. On the other hand, when a communication interruption occurs, the charging control unit 18 sets a preset value Pj as a current command value of the charging station where the communication interruption has occurred, so that the charging station and the communication interruption where the communication interruption has occurred are determined. It is possible to control the amount of power of each charging station that is not generated. That is, the charging control unit 18 supplies a current command so as to supply the subtracted power amount obtained by subtracting the charging power value when charging is performed based on the preset value Pj from the maximum supply power amount at a charging station where communication is not interrupted. Determine the value. Thereby, the sum total of the electric energy which each charging stand 15A, 15B supplies can be controlled below to the maximum supply electric energy.

  (2) The charging control unit 18 determines the preset value Pj when the peak power set value Px or the number of stands N is input. For this reason, when communication interruption occurs, control according to the configuration of the charging system K at the time of occurrence can be executed. As a result, it is possible to suppress a decrease in charging efficiency when communication is interrupted.

  (3) The preset value Pj is determined to be an equal value. According to this, it is possible to suppress a bias such that the preset value Pj becomes extremely large or small. In other words, it is possible to suppress the current command value of the charging station where communication interruption has not occurred from becoming extremely large or small. Therefore, it is possible to suppress a decrease in charging efficiency when communication is interrupted.

  (4) The preset value Pj is set to a value exceeding “0”. For this reason, charging can be performed even at a charging station where communication interruption has occurred. Therefore, it is possible to suppress a decrease in charging efficiency when communication is interrupted.

  (5) In addition, charging is performed even at a charging station where communication interruption has occurred, so that the waiting time of the user is not increased and the user is not dissatisfied. Also, maintenance such as elucidation of the cause of communication interruption and repair can be performed at the convenience of the installer. In other words, even if a communication interruption occurs, the charging station is still in operation, so there is no need for immediate repair.

In addition, you may change the said embodiment as follows.
The preset value Pj may be the maximum allowable value of the power cut-off units 23A and 23B provided in the charging stations 15A and 15B. According to this, since the preset value Pj is determined to be the maximum allowable value of the power cut-off units 23A and 23B, the process for determining the preset value Pj can be omitted, and the control configuration can be simplified. it can.

  It may be determined whether or not communication is interrupted by providing a current detector on the power line L1 connected to each charging station 15A, 15B and transmitting the detection result to the charging control unit 18. That is, when the current detector detects a current in a state where no signal is received, the charge control unit 18 detects that communication is interrupted.

The charging control unit 18 may be provided outside the power receiving facility 14.
(Circle) you may provide the charge control part 18 in either of the several charging stand 15A, 15B. In this case, the charging station provided with the charging control unit 18 and the other charging station are connected by a signal line so as to transmit and receive signals. And the charging control part 18 performs electric current control similarly to embodiment, when the communication interruption with another charging stand is detected.

O The installer may be able to set the preset value Pj to an arbitrary value by an input operation of the input unit 24.
○ The calculation method of the preset value Pj may be changed. For example, the preset value Pj may be a fixed value, and the value may be any value larger or smaller than the value calculated in the embodiment.

  ○ “0” may be set as the preset value Pj. In this case, it becomes impossible to charge at the charging station where communication has been interrupted. For this reason, it is preferable that the preset value Pj is set to a value exceeding “0” in order to charge the charging station that has been disconnected and to increase the charging efficiency of the charging system K.

The charging command value instructed by the charging control unit 18 may be a power command value or a voltage command value instead of the current command value.
O When the voltage value is constant in the charging system K, the power measurement unit 17 may be changed to a current measurement unit. That is, when the voltage value is constant, the power value supplied from the measurement result can be calculated by measuring the current. For this reason, the charging control unit 18 determines the current command value based on the measurement result of the current measuring unit so that the total amount of power supplied by the charging stations 15A and 15B does not exceed the peak power setting value Px. .

  ○ The preset value Pj may be changed to a power command value. According to this, when communication interruption occurs, the charging control unit 18 subtracts the preset value Pj, which is the power command value, from the peak power setting value Px, and the amount of power after the subtraction from the normal charging stand. The current command value is determined so as to be supplied. Further, when transmitting the preset value Pj to the charging stations 15A and 15B, the charging control unit 18 may transmit it as a power command value, or may change to a current command value and transmit it.

  In the embodiment, the preset value Pj is stored in each of the charging control unit 18 and the charging stations 15A and 15B, but may be stored in either one. Specifically, when the charging control unit 18 transmits a current command value at normal time, if the transmitted current command value is set as a preset value, a preset value is determined in advance on the charging stations 15A and 15B. You do not have to remember. In this case, the charging station where communication has been interrupted is charged even after communication is interrupted with the current command value received before communication is interrupted. For this reason, by storing the current command value transmitted by the charging control unit 18, the charging control unit 18 performs other normal charging based on the current command value transmitted to the charging station where communication has been interrupted. The current command value to be transmitted to the stand can be determined, and control can be performed so as not to exceed the peak power set value Px.

  In addition, the preset value Pj may be stored on the charging stand 15A, 15B side and not stored on the charging control unit 18 side. In this case, the charging control unit 18 calculates the amount of power supplied to the charging station where communication has been interrupted based on the measurement result of the power measuring unit 17, and subtracts the calculated amount of power from the peak power setting value Px. The current command value is determined so that the electric energy after the subtraction is supplied from a normal charging station. Thereby, it can control so that peak power setting value Px may not be exceeded.

  The embodiment is embodied in the charging system K that performs charging by mechanically connecting the charging plug P to the vehicles 10A and 10B. However, the vehicle and the charging unit (ground side equipment) can be used without using the charging plug P. It may be embodied in a non-contact charging system in which charging is performed by electrically connecting the two. As shown in FIG. 5, in the non-contact charging system, the power receiving side coil 30 attached to the vehicle 10 side and the power transmitting side coil 32 of the ground side equipment 31 embedded in the floor of the charging station are aligned. Thus, the vehicle 10 is stopped. At this time, the power receiving side coil 30 and the power transmitting side coil 32 are separated and brought into a non-contact state. In the non-contact vehicle charging system, the storage battery of the vehicle 10 is charged by receiving the power from the power transmission side coil 32 by the power reception side coil 30. Such a contactless charging system includes a resonance method and an electromagnetic induction method. In the non-contact charging system, the vehicle-side controller 33 mounted on the vehicle 10 and the power-side controller 34 installed on the ground-side facility 31 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 33 and the power-supply side controller 34. In the non-contact charging system, the ground-side equipment 31 corresponds to the charging stations 15A and 15B serving as charging units in the embodiment, and the power receiving equipment 14 is provided in the charging station.

  In the non-contact type vehicle charging system described in the above other example, signal transmission / reception between the vehicle controller 33 and the power supply controller 34 may be superimposed on power transmission.

Next, a technical idea that can be grasped from the above embodiment and another example will be added below.
(A) The power receiving system according to any one of claims 1 to 4, wherein the charging control unit is provided in a power receiving facility that receives power transmitted from an electric power system.

  (B) The charging system according to any one of claims 1 to 4, wherein the charging command value and the set value for interruption are current values.

  10A to 10C ... Vehicle, 11A, 11B ... Storage battery, 15A-15C ... Charging stand, 16 ... Power supply unit, 17 ... Power measurement unit, 18 ... Charge control unit, 20 ... Communication unit, 21A, 21B ... Communication unit, 23A , 23B ... Power cutoff unit, 24 ... Input unit, K ... Charging system, X to Z ... Current set value, Pj ... Pre-set value.

Claims (4)

A charging system for charging a storage battery mounted on a vehicle,
A plurality of charging units for supplying the vehicle with electric power for charging a storage battery mounted on the vehicle;
A power supply unit that receives externally supplied power and distributes the received power to each charging unit;
A charge control unit that controls charging power so that the total amount of power supplied by each charging unit is equal to or less than the maximum supply power amount;
A communication unit that transmits and receives signals between the charging control unit and the charging unit,
The charging control unit determines a charging command value for supplying a predetermined amount of charging power from each charging unit and transmits the charging command value to the charging unit via the communication unit;
As at least one of the charging control unit and the charging unit, as a charging command value for supplying a predetermined amount of charging power from the charging unit in which communication is interrupted when communication by the communication unit is interrupted The set value for interruption is stored,
When communication by the communication unit is interrupted,
While the charging unit that has lost communication performs charging based on the setting value for the interruption,
The charging control unit is configured to supply a charging command value so as to supply a subtracted electric energy obtained by subtracting an amount of electric power supplied based on the set value for interruption from the maximum supply electric energy by a charging unit that is not disconnected. A charging system comprising: determining and transmitting the determined charging command value to a charging unit that has not lost communication. An input unit for inputting the maximum power supply amount and the number of charging units;
The charging control unit determines the set value for breakage when an input operation of at least one of the maximum power supply amount and the number of the charging units is performed, and the each setting unit via the communication unit The charging system according to claim 1, wherein the set value for interruption is transmitted to a charging unit.   The charge control unit determines a charge command value for supplying an electric energy obtained by dividing the maximum supply electric energy by the number of the charging units as the set value for interruption. Charging system.   Each charging unit is provided with a power cut-off unit that cuts off a current flow when an overcurrent flows, and the set value for interruption is set to a maximum allowable value of the power cut-off unit. The charging system according to claim 1.