JP7272240B2 - Power cable and charging control method - Google Patents

Description

TECHNICAL FIELD Embodiments of the present invention relate to a power cable and a charging control method.

In recent years, introduction of electric vehicles (EV) and plug-in hybrid vehicles (PHEV) is progressing. In order to charge EV/PHEV, it is necessary to deploy facilities such as charging stations, but the number of facilities installed has not reached a sufficient level. As an alternative to such equipment, a power cable for charging an EV/PHEV with AC power or the like supplied from an outlet or the like is known (see, for example, Patent Document 1). Standards (IEC61851-1, etc.) are defined to ensure the safety and quality of such power cables. Users can safely charge each device by identifying and using a power cable that complies with the standard.
Patent Literature 1 describes a charging cable that enables charging of one or a plurality of cascaded EVs/PHEVs from one outlet.

JP 2014-140289 A

However, according to Patent Literature 1, the charging cable communicates using a single communication path such as a power line, but communication becomes impossible when the communication path is interrupted. When such an event occurs, it becomes impossible to detect the presence of a charging cable that requires charging, and the reliability of control for transferring power may decrease.
In addition, when a charging facility is installed in each home and the EV/PHEV is charged by the charging facility, the main breaker may trip if the received power increases. For this reason, in homes where electric water heaters heat water at midnight, EV/PHEV cannot be charged late at night.
SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide a power supply capable of improving the reliability of control for supplying power to a moving body that is driven using power. The object of the present invention is to provide a cable and a charging control method.

One aspect of the present invention is a power cable that includes a plug connected to a power supply side and a connector connectable to a mobile body, and supplies power to the mobile body via the plug and the connector. creating a receiving current request, which is a signal requesting a receiving current value, which is the power supplied by the main trunk, to a smart meter that monitors the current flowing through the main trunk, and the smart meter transmits in response to the created receiving current request. a management unit that determines whether or not to suppress the charging power of the moving object based on the received power current value included in the received power response, and transmits the received power request created by the management unit to the smart meter. and receiving the power receiving current response transmitted by the smart meter in response to the transmitted power receiving current request, and establishing a communication path between the moving body electrically connected to the own power supply cable via the connector a communication unit that communicates using a and, when the management unit determines to suppress the charging power of the moving object, derives a charging current value based on the received power current value, and converts the derived charging current value to and a control unit that uses the communication path to notify the moving object, and an ampere breaker that cuts off the current detects the current flowing through the main trunk, and then based on the detected current, the the time required to cut off the current, and the time required for the communication unit to transmit the power reception current request and receive the power reception current response transmitted by the smart meter in response to the transmitted power reception current request; , the time required for the moving object to change the charging current after the control unit transmits information indicating the charging current value to the moving object, and the control unit determines the charging current value is the power cable that adjusts the time required to derive the
In the power cable according to one aspect of the present invention, the management unit changes the cycle of generating the received current request based on whether or not to suppress the charging power of the moving object.
In the power cable according to one aspect of the present invention, the management unit shortens the cycle of generating the received current request when the received current value is higher than a first charging current threshold.
In the power cable of one aspect of the present invention, the management unit lengthens the cycle of generating the received current request when the received current value is lower than a second charging current threshold.
In the power cable of one aspect of the present invention, when changing the charging power to the moving body, the control unit changes the charging power value at a predetermined ratio based on the received current value.
In the power cable of one aspect of the present invention, when changing the charging power to the moving body, the control unit changes the charging power value to a predetermined value based on the received current value.
One aspect of the present invention includes a plug that connects to a power supply side and a connector that can connect a moving body, and a power cable that supplies power to the moving body through the plug and the connector. A charging control method comprising: creating a received current request, which is a signal for requesting a received current value, which is power supplied from the main trunk, to a smart meter that monitors the current flowing through the main trunk; On the other hand, a step of determining whether or not to suppress the charging power of the moving body based on the received power current value included in the received power current response transmitted by the smart meter; transmitting a request and receiving a power receiving current response transmitted by the smart meter in response to the transmitted power receiving current request; and deriving a charging current value, and notifying information indicating the derived charging current value to the moving object using a communication path, wherein the step of notifying includes an ampere that cuts off the current A breaker detects a current flowing through the main trunk until it cuts off the current based on the detected current; The time required for the smart meter to receive the received power response, and the time required for the mobile body to change the charging current after the information indicating the charging current value is transmitted to the mobile body. and adjusting the time required to derive the charging current value based on the charging control method.

According to the embodiments of the present invention, it is possible to improve the reliability of control for supplying electric power to a moving object that is driven using electric power.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the outline|summary of the charging system which concerns on embodiment. It is a block diagram showing an example of a power cable included in the charging system according to the embodiment. FIG. 2 is a diagram showing an example 1 of procedures for controlling a charging current to an electric vehicle EV; FIG. 5 is a diagram showing an example 2 of procedures for controlling a charging current to an electric vehicle EV; 4 is a sequence chart showing an example of the operation of the charging system according to the embodiment; FIG. 7 is a block diagram showing an example of a power cable included in a charging system according to Modification 1 of the embodiment; FIG. 9 is a diagram showing an example of a procedure for controlling charging current to an electric vehicle by a power cable according to Modification 1 of the embodiment; 9 is a sequence chart showing an example of the operation of the charging system according to Modification 1 of the embodiment; FIG. 11 is a block diagram showing an example of a power cable and a smart meter included in a charging system according to Modification 2 of the embodiment; FIG. 10 is a sequence chart showing an example of the operation of the charging system of modification 2 of the embodiment; FIG.

Next, the power cable and charging control method of this embodiment will be described with reference to the drawings. The embodiments described below are merely examples, and embodiments to which the present invention is applied are not limited to the following embodiments.
In addition, in all the drawings for explaining the embodiments, the same reference numerals are used for the parts having the same functions, and repeated explanations are omitted.
In addition, "based on XX" in the present application means "based on at least XX", and includes cases based on other elements in addition to XX. Moreover, "based on XX" is not limited to the case of using XX directly, but also includes the case of being based on what has been calculated or processed with respect to XX. "XX" is an arbitrary element (for example, arbitrary information).

(embodiment)
(charging system)
FIG. 1 is a diagram showing an overview of a charging system according to an embodiment.
The charging system of the embodiment is installed in a general house H. In the house H, electric power is supplied to electric appliances such as a dryer D, an ecocute EC, an electromagnetic cooker IH, etc. via a utility pole PP, a distribution line DL, a smart meter SM, and a distribution board PB. In addition, in the house H, electric power is supplied to a moving body such as an electric vehicle EV via a utility pole PP, a distribution line DL, a smart meter SM, a distribution board PB, a charging outlet CE, and a power cable 1. is supplied. The distribution board PB includes a charging facility PS. Hereinafter, as an example, the case where electric power is supplied to the electric vehicle EV will be described.
An electric vehicle EV is, for example, a battery electric vehicle (BEV) or a plug-in hybrid vehicle (PHEV). The electric vehicle EV includes a storage battery BT (not shown), and uses power from the storage battery BT for running the vehicle. The storage battery BT stores power by charging power from a charging facility PS or the like connected to the electric vehicle EV.

The distribution board PB includes an ampere breaker AB. The specifications of the distribution board PB determine the type of charging, such as normal charging and rapid charging, and are categorized according to the current capacity during charging. Normal charging is, for example, a mode of charging with power from an AC outlet C. As shown in FIG. Rapid charging is, for example, a form of charging using a dedicated charging station or the like. In addition, in the case of normal charging, one electric vehicle EV is charged with electric power from one outlet C (power supply system), or the electric power is distributed to a plurality of electric vehicles EV and their electricity is charged. It is possible to charge an automobile EV.

Methods of charging an electric vehicle EV include a case of using alternating current and a case of using direct current, and there are standards that define these methods. Interface specifications for using alternating current are defined in IEC (International Electrotechnical Commission) 61851-1 and the like. Interface specifications for using direct current are defined in IEC61851-23 and the like. The power cable 1 shown in this embodiment conforms to, for example, the above standards. According to IEC61851-1, the minimum current value of the current to be supplied during the charging operation is specified for each electric vehicle EV. When charging an electric vehicle EV with power from an electrical outlet in compliance with IEC61851-1, it is stipulated that the current flowing through the electric vehicle EV should be equal to or greater than this minimum current value. In this embodiment, a case of charging an electric vehicle EV using alternating current will be described.

For example, the following loads are connected to the charging outlet CE of the charging system shown in FIG. A power cable 1 is connected to the charging outlet CE. The power cable 1 controls the supply of power supplied from the charging outlet CE and supplies the power to the electric vehicle EV. The power cable 1 notifies the corresponding electric vehicle EV of the amount of power that can be supplied.
Thus, by using the charging outlet CE and the power cable 1, the electric vehicle EV can be charged by the normal charging method described above.

Details of a case of charging using the charging outlet CE and the power cable 1 will be described below.
FIG. 2 is a block diagram illustrating an example of a power cable included in the charging system according to the embodiment; In the example shown in FIG. 2, charging outlet CE is provided from smart meter SM via ampere breaker AB. The smart meter SM monitors the current flowing through the main trunk.
The charging outlet CE on the power supply side is provided with a plurality of terminals to which low-voltage alternating current is applied and a ground terminal that is grounded. The rms value of the low voltage nominal voltage is, for example, 100V (volts) or 200V. Note that the ground terminal of the power cable 1 may be grounded with this ground terminal.
The power cable 1 includes a plug (first terminal) 11, a mobile body connector (second terminal) 12, and a control box 14 (hereinafter referred to as "CBOX 14").

The plug 11 is formed, for example, in a shape that can be attached to and detached from a charging outlet CE on the power feeding side.
The mobile object connector 12 is formed in a shape that can be attached to and detached from the electric vehicle EV, and is connected to the electric vehicle EV. For example, the mobile body connector 12 may be shaped to have a grip (not shown) so that it can be easily held.
A cable LN 1 is connected to the plug 11 , and a cable LN 2 is connected to the mobile unit connector 12 . The plug 11 and the mobile body connection connector 12 are connected via a cable LN1, a cable LN2 and a cable LN3. Cable LN1 includes a ground wire connected to the ground terminal of each plug 11 . Cable LN2 includes a ground wire connected to the ground terminal of each mobile unit connector 12. FIG.

A CBOX 14 is provided between the plug 11 connected to the cable LN1 and the mobile object connector 12 connected to the cable LN2. As shown in FIG. 2, the CBOX 14 is electrically connected to the plug 11 via the cable LN1 and electrically connected to the mobile unit connector 12 via the cable LN2. The CBOX 14 is provided with a ground terminal, and the power cable 1 is used with the terminal grounded. The ground terminal of the CBOX 14 may be provided independently of the terminals of the plug 11, mobile unit connector 12, etc., or may also serve as the ground terminal inside the plug 11. FIG.
By integrating the plug 11 and the CBOX 14, the cable LN1 can be omitted, and by integrating the CBOX 14 and the mobile object connector 12, the cable LN2 can be omitted.
The plug 11 includes a set of terminals (first terminal) for electrically connecting the power cable 1 to an AC supply source, and a ground terminal.

The mobile object connector 12 includes a set of terminals (second terminals) for electrically connecting the power cable 1 to the electric vehicle EV, and a ground terminal. The set of terminals may include terminals for communicating with an electric vehicle EV.
A measuring unit 141, an earth leakage breaker (RCD (Residual Current Device)) 142, and a switch 143 are provided between the plug 11 (first terminal) and the mobile body connection connector 12 (second terminal). ing.
The weighing unit 141 is a weighing instrument that measures the amount of power, the number of charging times, and the charging time. In the following description, a case where the measuring unit 141 measures the amount of power will be described, but the present invention is not limited to this. For example, the weighing unit 141 may be a so-called smart meter. The measuring unit 141 of the embodiment includes a detection unit that detects the power amount, a communication control unit that notifies the detected power amount, and a communication unit that communicates under the control of the communication control unit. For example, the weighing unit 141 communicates with the PLC modulation unit 1441 of the CBOX 14 through its communication unit.

The earth leakage circuit breaker 142 detects an earth leakage occurring on the electric vehicle EV side from the earth leakage circuit breaker 142, and cuts off the circuit when a leakage current equal to or greater than a predetermined value is detected. For example, the earth leakage breaker 142 detects an earth leakage occurring in the range from the earth leakage breaker 142 in the CBOX 14 to the connection to the electric vehicle EV, for example, the cable LN2 or the mobile object connection connector 12, and the user detects the cable LN2 and This prevents an electric shock when touching the mobile body connector 12. - 特許庁
The switch 143 is set to a conductive state under the control of the controller 147 . For example, the switch 143 enables the supply of electric power to the electric vehicle EV connected to the mobile body connector 12 when it is in a conducting state, and restricts the supply of power when it is in an interrupted state. .

[Detailed configuration of power supply system in CBOX 14]
A more specific configuration within the CBOX 14 in the embodiment will be illustrated.
For example, as shown in FIG. 2, the weighing unit 141, the earth leakage circuit breaker 142, and the switch 143 are serially arranged from the plug 11 side along the direction from the plug 11 to the mobile object connector 12. It is connected to the. That is, the measuring unit 141 is provided closer to the plug 11 than the earth leakage circuit breaker 142, and measures the power supplied from the power cable 1 to the electric vehicle EV and the power consumed by the power cable 1 for supplying the power. do.
Cable LN1 drawn into CBOX 14 is connected to one end of earth leakage breaker 142, and the other end of earth leakage breaker 142 is connected to one end of cable LN3. One end of the switch 143 is connected to the other end of the cable LN3, and the other end of the switch 143 is connected to the cable LN2.
The weighing unit 141 measures the power that the power cable 1 supplies to the electric vehicle EV.
Such a power cable 1 supplies electric power to an electric vehicle EV via a plug 11 and a mobile object connector 12 . In the electric vehicle EV, the electric power supplied to the electric vehicle EV is charged in a power storage unit BT of the electric vehicle EV as electric power for driving the electric vehicle EV.

[Detailed configuration of control system in CBOX 14]
The CBOX 14 includes a communication section 144 , a setting section 145 , an input section 146 , a control section 147 and a power supply section 148 .
Communication unit 144 includes PLC modulation unit 1441 and communication IF unit 1444 .
Under the control of the control unit 147, the PLC modulation unit 1441 uses the cable LN1 or the like as a medium to communicate with devices such as the weighing unit 141 connected to the cable LN1 or the like using the power line carrier communication (PLC communication) method. Communicate by This PLC communication method may select a known general method.
The PLC modulation unit 1441 uses PLC communication to communicate with the electric vehicle EV that is electrically connected to its own power supply cable 1 via the mobile body connection connector 12 .
Communication IF section 1444 communicates using wireless communication. The communication IF unit 1444 is connected to an external device such as a smart meter SM through the power cable 1 and communicates with the external device. The connection between the communication IF unit 1444 and the external device may use wireless communication such as wireless LAN, close proximity wireless communication, mobile communication network, Wi-SUN (Wireless Smart Utility Network), or wired communication. good. In this embodiment, the case where the communication IF unit 1444 and the smart meter SM perform wireless communication will be described. Specifically, the case where the communication IF unit 1444 and the smart meter SM establish a Wi-SUN B route connection will be described. The communication IF 1444 transmits the power reception current request output by the control unit 147 to the smart meter SM. Here, the power receiving current request is a signal requesting a power receiving current value, which is the power supplied by the master. The communication IF 1444 receives the power reception current response transmitted by the smart meter SM in response to the transmitted power reception current request. Communication IF 1444 outputs the received power reception current response to management unit 1475 .
In the following description, a communication path based on PLC communication may be referred to as a first communication path, and a communication path based on wireless communication may be referred to as a second communication path.

The setting unit 145 includes an LCD (liquid crystal display) or the like, displays information to be set on the control unit 147, and sets according to an operation performed on the displayed information. For example, the information displayed on the setting unit 145 includes status display indicating the control status of the power cable 1 and the like.
The input unit 146 detects a user's operation on the setting unit 145 and provides information on the detected operation to the control unit 147 . The input unit 146 may be configured as a touch panel provided on the display surface of the setting unit 145, for example. The information that the input unit 146 acquires from the user's operation includes information about the amount of charging power to be suppressed when charging power to the electric vehicle EV is suppressed.

The control unit 147 includes, for example, a computer including a CPU and a storage unit (not shown), and performs various processes as the CPU executes programs.
Control unit 147 includes SW control unit 1471 , CPLT (Control Pilot) unit 1472 , power amount control unit 1474 , and management unit 1475 .
SW control unit 1471 controls the conduction state of switch 143 . For example, the SW control unit 1471 makes it possible to supply electric power to the electric vehicle EV by bringing the switch 143 into a conductive state.
The CPLT unit 1472 communicates with the electric vehicle EV. The communication interface specification of the CPLT unit 1472 may conform to IEC61851-24, for example. In this case, communication between the CPLT unit 1472 and the electric vehicle EV is performed via terminals provided in the mobile body connection connector 12 . For example, the CPLT unit 1472 transmits information for controlling the state of the electric vehicle EV with which the CPLT unit 1472 communicates to the electric vehicle EV through communication using the CPLT signal. Specifically, the CPLT unit 1472 transmits information indicating the charging current value to the electric vehicle EV.

Based on a command from the management unit 1475, the power amount control unit 1474 controls so that the storage battery BT of the electric vehicle EV can be charged with a desired amount of power. Electric energy control unit 1474 performs main control for charging storage battery BT of electric vehicle EV. The power amount control unit 1474 acquires information indicating that the charging power is to be suppressed (hereinafter referred to as “charging power suppression information”) output by the management unit 1475 described later, and controls the electric vehicle based on the acquired charging power suppression information. Suppress EV charging power. When suppressing the charging power of the electric vehicle EV, the power amount control unit 1474 may suppress the charging power based on a predetermined ratio such as 1/2 or 1/3 of the current charging power. , 0 A, or the like. Settings related to the charging power such as the charging power value may be performed by the user by operating the input unit 146 . Power amount control section 1474 derives a charging current value based on the charging power value, and outputs information indicating the derived charging current value to CPLT section 1472 . In the following description, the processing performed by the power amount control unit 1474 may be described as the processing of the control unit 147. FIG.

Management unit 1475 receives notification that power is supplied to power supply unit 148 and that power supply unit 148 has detected it, and detects a state in which power is being supplied to power cable 1 . Management unit 1475 collects the results of weighing by weighing unit 141 . The management unit 1475 detects whether or not the electric vehicle EV is being charged from the result of weighing by the weighing unit 141 . For example, if the measurement result (power or current) is equal to or less than a predetermined value, it is determined that the battery is not in a charged state.
Management unit 1475 includes a storage area for storing information regarding the control state of power cable 1 . For example, the information about the control state of the power cable 1 includes the identification number of the power cable itself, the identification number of the power cable acquired by communication (for example, the identification number of the CBOX 14), the information specifying the power cable that permits charging, the charging This includes the number of power cables, etc. The management unit 1475 causes the setting unit 145 to display the collected various information.
The management unit 1475 acquires information from the smart meter SM by communicating with the smart meter SM. Specifically, the management unit 1475 causes the communication IF unit 1444 to perform connection processing with the smart meter SM. After connection processing is performed between the communication IF unit 1444 and the smart meter SM, the management unit 1475 creates a power receiving current request, which is a signal requesting a power receiving current value, and sends the created power receiving current request to the communication IF. It is transmitted from the unit 1444 to the smart meter SM.

The smart meter SM receives the power receiving current request transmitted by the power cable 1 and detects the power receiving current based on the received power receiving current request. The smart meter SM creates a power reception current response including information indicating the detected power reception current value. The smart meter SM transmits the generated power reception current response to the CBOX 14 .
In CBOX 14, communication IF unit 1444 receives the power reception current response transmitted by smart meter SM. Management unit 1475 acquires the power reception current response received by communication IF unit 1444 . The management unit 1475 determines whether or not the received power current value is greater than or equal to the received power current threshold based on the received power current value included in the acquired received power current response. If the management unit 1475 determines that the received current value is equal to or greater than the received current threshold, the management unit 1475 creates charging power suppression information and outputs the created charging power suppression information to the power amount control unit 1474 . When the management unit 1475 determines that the received current value is less than the received current threshold, the management unit 1475 ends the process of suppressing the charging power.

Here, a specific example of processing of the control unit 147 will be described.
[Determination of electric vehicle EV to be charged]
The control unit 147 is electrically connected to the electric vehicle EV via, for example, the mobile body connection connector 12 of the power cable 1, and communicates with the electric vehicle EV via the first communication path using wired communication. When communication is established and communication is established through the second communication path, it may be determined which electric vehicle EV is allowed to transfer electric power to and from the electric vehicle EV. For example, the above wired communication is PLC communication using cable LN1 or the like. In this way, the charging system has a plurality of communication paths with the other party of communication, so that each communication path can be used according to the purpose.

Note that the control unit 147 is connected to the own power cable 1 even when there is an electric vehicle EV that is electrically connected via the moving body connection connector 12 of another power cable different from the own power cable 1. The same processing as in the electric vehicle EV may be performed. That is, the control unit 147 determines that there is an electric vehicle EV that is electrically connected via the mobile body connection connector 12 of another power cable, communication is established by the first communication path using wired communication, and the second communication is established. When communication is established through the path, the transfer of electric power to and from the electric vehicle EV may be permitted. In this way, the propriety of the transfer of electric power to and from the electric vehicle EV in the charging system is determined by the control unit 147 based on the information collected using the communication through the plurality of communication paths between the plurality of power cables 1. is judged in
In the above case, the control unit 147 uses the first communication path to collect identification information of other power cables, and based on the collected identification information, can exchange power with other power cables. state may be detected using the second communication path.

The control unit 147 causes the communication unit 144 to establish the second communication path using the wireless communication line and establish the first communication path using the wired communication line. For example, the control unit 147 may cause the communication unit 144 to establish the first communication path using power line carrier in a wired communication line. For example, in the process of establishing the communication path, predetermined information (message) is obtained from the other party of communication, and the information includes identification information for specifying the other party of communication. and includes processing up to continuing acquisition of information based on the identification information.

[Determination of amount of electric power exchanged with electric vehicle EV]
The control unit 147 determines the number of power cables 1 allowed to transfer power to and from the electric vehicle EV, including the number of other power cables that are ready to transfer power to and from the electric vehicle EV. to decide. Based on the determined number, the control unit 147 may determine the specified value of the amount of power that can be supplied from another power cable to the electric vehicle EV corresponding to that power cable. For example, when the number of other power cables capable of transmitting and receiving power is one, and the own power cable 1 is not in a state capable of transmitting and receiving power, the control unit 147 selects the target to which power is to be supplied. Assume that the total number of power cables 1 is one. Alternatively, when the self-power cable 1 is in a state in which power can be transferred, the total number of power cables 1 to which power is supplied is set to two.

Based on the current value at that time, if the determined number is plural, the control unit 147 uses a coefficient to reduce the current supplied by each power cable 1 . For example, when the determined number is two, the control unit 147 distributes power to these two power cables 1 .
The coefficient at that time is set to 0.5, which is half of the case of one. Also, when the number determined by the control unit 147 is N, the value is 1/N of the case of one (1 /N).
Based on the determined number, the control unit 147 determines the specified value of the amount of power that can be supplied to the electric vehicle EV electrically connected to the own power cable 1 . By determining the coefficients in this way, the control unit 147 determines the specified value of the amount of electric power that can be supplied to the electric vehicle EV electrically connected to the own power cable 1 based on the coefficients corresponding to the determined number. can be evenly
Note that the control unit 147 may adjust the current value supplied to the electric vehicle EV so as not to fall below the lower limit value of the current set for the electric vehicle EV.

[Procedure for ending charging of an electric vehicle EV]
In the charging system of the embodiment, the value of the current for charging the electric vehicle EV from each power cable 1 is determined based on the number of power cables 1 for charging, as described above. The electric vehicles EV that have accumulated a predetermined amount of charge finish charging one by one and are disconnected from the corresponding power cable 1 .
For example, when the number of electric vehicles EV to be charged using the power cable 1 changes, the charging system suspends charging by the control unit 147 and resets the current value to be distributed. The procedure for resetting the current value may follow the same procedure as the above procedure for setting the current value. As a result, even if the number of electric vehicles EV connected to the system of the power cable 1, that is, the number of power cables for charging increases or decreases, the target electric vehicles EV are reviewed. The electric vehicle EV can be charged with proper electric power without being affected by

[Procedure for controlling charging current to electric vehicle EV]
Regarding the procedure for controlling the charging current to the electric vehicle EV, the connection processing is started between the communication IF unit 1444 and the smart meter SM, and the connection processing is performed between the communication IF unit 1444 and the smart meter SM. A case where communication is performed and a case where communication is performed will be described separately.
A case will be described where communication is started from connection processing between the communication IF unit 1444 and the communication unit smart meter SM.
FIG. 3 is a diagram showing an example 1 of procedures for controlling the charging current to the electric vehicle EV. In FIG. 3, the upper, middle, and lower diagrams show the case where the charging current is controlled independently.
In FIG. 3, the upper diagram represents the power receiving current detected by the smart meter SM. In the upper diagram of FIG. 3, the horizontal axis is time, and the vertical axis is the receiving current value. In the upper part of FIG. 3, a received current value equal to or greater than the contracted ampere was detected at time ta1, a received current value equal to or greater than the contracted ampere was continuously detected from time ta1 to time Ta, and time ta2 after time Ta has passed since time ta1. shows an example in which a received current value less than the contract ampere was detected.
In FIG. 3, the middle diagram shows the time from when the ampere breaker AB detects a current exceeding the contracted ampere value to when the supply of electricity is automatically stopped. In the middle diagram of FIG. 3, the horizontal axis is time. Ampere breaker AB detects the current flowing through the main trunk. In the middle part of FIG. 3, the ampere breaker AB turns on the timer until it trips when a received current value equal to or greater than the contracted amperage is detected at time tb1, and the time Tb starts from the time tb1 when the turned-on timer expires. An example of tripping at elapsed time tb2 is shown. An example of the time Tb from when the ampere breaker AB detects a received current value equal to or greater than the contracted ampere until it trips is 30 [sec].

In FIG. 3, the lower diagram shows the operation of the control unit 147 of the CBOX 14. As shown in FIG. In this example, the control unit 147 starts connection processing with the smart meter SM at time tc1, and at time tc5 when time Tc (<Tb) has elapsed from time tc1, starts charging current to the electric vehicle EV. Complete the process to control.
In the lower diagram of FIG. 3, the horizontal axis is time. In the lower part of FIG. 3, Tc1, Tc2, Tc3, and Tc4 are respectively shown below.
Tc1 (from time tc1 to time tc2) is the time required for control unit 147 to cause communication IF unit 1444 to perform connection processing with smart meter SM. In the control unit 147, the management unit 1475 performs initial settings for requesting the receiving current from the smart meter SM. The management unit 1475 causes the communication IF unit 1444 to perform connection processing with the smart meter SM. The management unit 1475 causes the communication IF unit 1444 to perform an active scan in which the last eight characters of the B route authentication ID are specified as the PairingID in order to search for the channel on which the smart meter SM is operating. The management unit 1475 sets the channel of the smart meter SM responding to the active scan to the communication IF unit 1444, thereby establishing a connection with the smart meter SM. The management unit 1475 saves the channel of the smart meter SM after the connection with the smart meter SM is completed.

Tc2 (from time tc2 to time tc3) is the time required for the control unit 147 to cause the communication IF unit 1444 to transmit the received power request to the smart meter SM, This is the sum of the time required to receive the received power response sent by the meter SM. The time required for control unit 147 to cause communication IF unit 1444 to transmit a power reception current request to smart meter SM, and control unit 147 to communication IF unit 1444 receive the power reception current response transmitted by smart meter SM. An example of the sum Tc2 with the time required for the operation is 32 [msec] according to the "HEMS-smart meter B route operation guideline 4.0". Therefore, in this embodiment, Tc2 is assumed to be 1 [sec].
Tc3 (from time tc3 to time tc4) is required for control unit 147 to determine whether or not the received power current value is greater than or equal to the received power current threshold value, and to create charging power suppression information based on the determination result. It is the sum of the time, the time required to derive the charging power value based on the charging power suppression information, and the time required to derive the charging current value based on the derived charging power value. This time corresponds to the processing time such as CPLT change processing in the CBOX 14, and is assumed to be 4 [sec] at maximum in this embodiment.
At Tc4 (from time tc4 to time tc5), the control unit 147 transmits information for controlling the state of the electric vehicle EV to the electric vehicle EV based on the derived charging current value through communication using the CPLT signal. and the time required for the electric vehicle EV to control the state based on the information for controlling the state of the electric vehicle EV. According to IEC61851-1, the maximum time from the CPLT change process to the change of the charging current of the vehicle is 10 [sec], so in this embodiment, it is assumed to be 10 [sec].

According to FIG. 3, by setting Tc<Tb, if tc1≦tb1, the electric vehicle EV can control the state of the electric vehicle EV before the ampere breaker AB trips. It is possible to prevent the ampere breaker AB from tripping.
Further, by setting Tc<Tb, if tc1>tb1, then by adjusting Tc3 so that tc5<tb2, before the ampere breaker AB trips, the electric vehicle EV However, since it controls the state of the electric vehicle EV, it can prevent the ampere breaker AB from tripping. Since Tc1, Tc2, and Tc4 are defined and difficult to adjust, Tc3 is adjusted.

Next, a case where communication is performed while connection processing is being performed between the communication IF 1444 and the smart meter SM will be described.
FIG. 4 is a diagram showing example 2 of the procedure for controlling the charging current to the electric vehicle EV. In FIG. 4, the upper, middle, and lower diagrams show the case where the charging current is controlled independently.
In FIG. 4 , the upper diagram represents the power receiving current detected by the smart meter SM, and is the same as the upper diagram in FIG. 3 .
In FIG. 4, the middle diagram shows the time from when the ampere breaker detects a current exceeding the contracted ampere value to when the electricity supply is automatically stopped, similar to the middle diagram of FIG. be.

In FIG. 4 , the lower diagram shows the operation of the control section 147 of the CBOX 14 . In this example, control unit 147 starts connection processing with smart meter SM, and at time t1d4 when time T1d (<Tb) has elapsed from time t1d1, performs processing for controlling the charging current to electric vehicle EV. complete.
In the lower diagram of FIG. 4, the horizontal axis is time. In the lower part of FIG. 4, T1d1, T1d2, and T1d3 are shown below, respectively.
T1d1 (from time t1d1 to time t1d2) is the time required for the control unit 147 to cause the communication IF unit 1444 to transmit the received power request to the smart meter SM, This is the sum of the time required to receive the received power response sent by the meter SM. The time required for control unit 147 to cause communication IF unit 1444 to transmit a power reception current request to smart meter SM, and control unit 147 to communication IF unit 1444 receive the power reception current response transmitted by smart meter SM. An example of the sum T1d1 with the time required for the operation is 32 [msec] according to "HEMS-smart meter B route operation guideline 4.0". Therefore, in this embodiment, T1d1 is assumed to be 1 [sec].
T1d2 (from time t1d2 to time t1d3) is required for control unit 147 to determine whether or not the received power current value is equal to or greater than the received power current threshold, and to create charging power suppression information based on the determination result. It is the sum of the time, the time required to derive the charging power value based on the charging power suppression information, and the time required to derive the charging current value based on the derived charging power value.
At T1d3 (from time t1d3 to time t1d4), the control unit 147 transmits information for controlling the state of the electric vehicle EV to the electric vehicle EV based on the derived charging current value through communication using the CPLT signal. and the time required for the electric vehicle EV to control the state based on the information for controlling the state of the electric vehicle EV.

In the lower part of FIG. 4, T2d1, T2d2, and T2d3 are shown below, respectively.
T2d1 (from time t2d1 to time t2d2) is the same as T1d1. It is the sum of the time required for the IF unit 1444 to receive the power reception current response transmitted by the smart meter SM. The time required for control unit 147 to cause communication IF unit 1444 to transmit a power reception current request to smart meter SM, and control unit 147 to communication IF unit 1444 receive the power reception current response transmitted by smart meter SM. An example of the sum T1d1 with the time required for the operation is 32 [msec] according to "HEMS-smart meter B route operation guideline 4.0". Therefore, in this embodiment, T2d1 is assumed to be 1 [sec].
T2d2 (from time t2d2 to time t2d3) is the same as T1d2, and the control unit 147 determines whether or not the received power current value is equal to or greater than the received power current threshold value, and based on the determination result, sets the charging power suppression information. , the time required to derive the charging power value based on the charging power suppression information, and the time required to derive the charging current value based on the derived charging power value. be.
T2d3 (from time t2d3 to time t2d4) is the same as T1d3, and the control unit 147 receives information for controlling the state of the electric vehicle EV based on the derived charging current value through communication using the CPLT signal. , is the sum of the time required to transmit to the electric vehicle EV and the time required for the electric vehicle EV to control the state based on the information for controlling the state of the electric vehicle EV.

According to FIG. 4, by setting Tc<Tb, if t1d1≦tb1, the electric vehicle EV can control the state of the electric vehicle EV before the ampere breaker AB trips. It is possible to prevent the ampere breaker AB from tripping.
Further, by setting Tc<Tb, if t1d1>tb1, T1d2 can be adjusted so that t1d4<tb2. Since the electric vehicle EV can control the state of the electric vehicle EV before the ampere breaker AB trips, it is possible to prevent the ampere breaker AB from tripping. Since T1d1 and T1d3 are defined and difficult to adjust, T1d2 is adjusted.

[Operation of charging system]
FIG. 5 is a sequence chart showing an example of the operation of the charging system according to the embodiment. In the example shown in FIG. 5, the operation after the electric vehicle EV is connected to the charging outlet CE via the power cable 1 and charging is started will be described. In the example shown in FIG. 5, a case will be described in which communication is started from connection processing between the communication IF unit 1444 and the smart meter SM.
(Step S1)
In the CBOX 14, the management unit 1475 performs initial settings for requesting the receiving current from the smart meter SM.
(Step S2)
In the CBOX 14, the management unit 1475 causes the communication IF unit 1444 to perform connection processing with the smart meter SM. The management unit 1475 causes the communication IF unit 1444 to perform an active scan in which the last eight characters of the B route authentication ID are specified as the PairingID in order to search for the channel on which the smart meter SM is operating. The management unit 1475 sets the channel of the smart meter SM responding to the active scan to the communication IF unit 1444, thereby establishing a connection with the smart meter SM. The management unit 1475 saves the channel of the smart meter SM after the connection with the smart meter SM is completed.
(Step S3)
In CBOX 14 , management section 1475 creates a power receiving current request and outputs the created power receiving current request to communication IF section 1444 .
(Step S4)
In the CBOX 14, the communication IF unit 1444 acquires the power receiving current request output by the management unit 1475 and transmits the acquired power receiving current request to the smart meter SM.

(Step S5)
The smart meter SM receives the power receiving current request transmitted by the power cable 1 and detects the power receiving current based on the received power receiving current request. The smart meter SM creates a power reception current response including information indicating the detected power reception current value.
(Step S6)
The smart meter SM transmits the generated power reception current response to the CBOX 14 .
(Step S7)
In CBOX 14, communication IF unit 1444 receives the power reception current response transmitted by smart meter SM. Management unit 1475 acquires the power reception current response received by communication IF unit 1444 . The management unit 1475 determines whether or not the received power current value is equal to or greater than the received power current threshold based on the information indicating the received power current included in the acquired power receiving current response. Here, the case where the received power current value is equal to or greater than the received power current threshold will be continued.
(Step S8)
In CBOX 14 , management unit 1475 creates charging power suppression information and outputs the created charging power suppression information to power amount control unit 1474 . The power amount control unit 1474 acquires the charging power suppression information output by the management unit 1475, and starts suppressing the charging power based on the acquired charging power suppression information. The power amount control unit 1474 creates information indicating the charging current value based on the charging power suppression information.
(Step S9)
In CBOX 14 , power amount control section 1474 outputs information indicating the created charging current value to CPLT section 1472 . The CPLT unit 1472 acquires information indicating the charging current value output by the power amount control unit 1474, and transmits the acquired information indicating the charging current value to the electric vehicle EV.

In the above-described embodiment, the case where the smart meter SM and the CBOX 14 are wirelessly connected has been described, but the present invention is not limited to this example. For example, smart meter SM and CBOX 14 may be connected by wire. Specifically, smart meter SM and PLC modulation unit 1441 may be connected via cable LN1. In this case, the smart meter SM and the PLC modulating section 1441 communicate by the PLC communication method. The PLC modulation section 1441 acquires the signal output by the smart meter SM and outputs the acquired signal to the management section 1475 .
In the above-described embodiment, the case where the smart meter SM and the ampere breaker AB are separate devices has been described, but the present invention is not limited to this example. For example, the smart meter SM may incorporate an ampere breaker AB.

According to the charging system of the embodiment, the power cable 1 includes a plug 11 connected to the power supply side, and a connector 12 connectable to a moving object. The power cable 1 supplies power to the mobile object via the plug 11 and the connector 12 . The power cable 1 creates a receiving current request, which is a signal requesting a receiving current value that is the power supplied by the main to the smart meter SM that monitors the current flowing through the main trunk, and responds to the created receiving current request by the smart meter SM. A management unit 1475 that determines whether or not to suppress the charging power of the moving object based on the received power current value included in the received power current response transmitted by the SM, and a received power request created by the management unit 1475 to the smart meter SM. , receives a power reception current response transmitted by the smart meter SM in response to the transmitted power reception current request, and establishes a communication path between the mobile body electrically connected to the own power cable 1 via the connector 12 and the management unit 1475 derives a charging current value based on the received current value when the management unit 1475 determines to suppress the charging power of the mobile body, and the derived charging current value is and a control unit 147 that notifies the mobile unit using the communication path. The ampere breaker AB that cuts off the current detects the current flowing through the main trunk until it cuts off the current based on the detected current, and the communication unit 144 transmits and transmits the received current request. The amount of time required to receive the power reception current response transmitted by the smart meter SM in response to the power reception current request and the control unit 147 transmitting information indicating the charging current value to the mobile body, and the mobile body receiving the charging current. Control unit 147 adjusts the time required to derive the charging current value based on the time required for the change. By configuring in this way, the ampere breaker AB can suppress the charging power of the moving object during the time required from detecting the current flowing through the main trunk to cutting off the current based on the detected current. Breaker AB can be prevented from interrupting the current. Therefore, it is possible to increase the reliability of the control for supplying power to a moving body that is driven using power.

(Modification 1 of Embodiment)
(charging system)
FIG. 1 can be applied to the outline of the charging system according to Modification 1 of the embodiment. However, instead of the power cable 1, a power cable 1a is provided.
FIG. 6 is a block diagram showing an example of a power cable included in a charging system according to Modification 1 of the embodiment.
Compared to the power cable 1 of the embodiment, the power cable 1a of the second embodiment includes a CBOX 14a instead of the CBOX 14, a control unit 147a instead of the control unit 147, and a management unit 1475 instead of the management unit 1475. 1475a is provided.

The management unit 1475a can apply the management unit 1475a. However, the management unit 1475a is different in that it performs the following processing when it acquires the power reception current response received by the communication IF unit 1444 . The management unit 1475a determines whether or not the received power current value is equal to or greater than the received power current threshold based on the information indicating the received power current included in the acquired power receiving current response. When the management unit 1475 a determines that the received current value is equal to or greater than the received current threshold, the management unit 1475 a creates charging power suppression information and outputs the created charging power suppression information to the power amount control unit 1474 . Further, when the management unit 1475a determines that the received power current value is equal to or greater than the received power current threshold, the management unit 1475a changes the cycle for creating the received power current request to a shorter cycle. When the management unit 1475a determines that the received current value is less than the received current threshold, the management unit 1475a ends the process of suppressing the charging power. Further, when the management unit 1475a determines that the received power current value is less than the received power current threshold value, the management unit 1475a changes the cycle for creating the received power current request to a longer cycle.

[Procedure for controlling charging current to electric vehicle EV]
A procedure for controlling the charging current to the electric vehicle EV will be described. The embodiment can be applied to a case where communication is started from connection processing between the communication IF unit 1444 and the smart meter SM. A case will be described where communication is performed while connection processing is being performed between the communication IF 1444 and the smart meter SM.
FIG. 7 is a diagram illustrating an example of a procedure in which the power cable according to Modification 1 of the embodiment controls the charging current to the electric vehicle. In FIG. 7 , the upper, middle, and lower diagrams show the case where the charging current is controlled independently.
In FIG. 7 , the upper diagram represents the received power current detected by the smart meter SM, and is the same as the upper diagram in FIG. 3 . In FIG. 7, the middle diagram shows the time from when the ampere breaker detects a current exceeding the contracted ampere value to when the electricity supply is automatically stopped, similar to the middle diagram of FIG. be.

In FIG. 7, the lower diagram shows the operation of the control section 147a of the CBOX 14a. In the lower diagram, the control unit 147a suppresses the charging current to the electric vehicle EV at time t1e4 when time T1e (<Tb) has elapsed from time t1e1 after starting connection processing with the smart meter SM. An example is shown in which the process to do is completed.
Further, in the lower diagram, the control unit 147a controls the electric vehicle EV at time t2e3 when time T2e (<Tb) has elapsed from time t2e1 after completion of the process of controlling the charging current to the electric vehicle EV at time t1e4. An example is shown in which the process of controlling the charging current to the automobile EV is completed. Further, in the lower diagram, the control unit 147a controls the electric vehicle EV at time t3e3 when time T3e (<Tb) has elapsed from time t3e1 after completion of the process of controlling the charging current to the electric vehicle EV. An example is shown in which the process of controlling the charging current to the automobile EV is completed. Here, the time t1e1 to time t2e1 represented by T1 is shorter than the time t2e1 to time t3e1 represented by T2.

In the lower part of FIG. 7, T1e1, T1e2, and T1e3 are respectively shown below.
T1e1 (from time t1e1 to time t1e2) is the time required for the control unit 147a to cause the communication IF unit 1444 to transmit the received power request to the smart meter SM, This is the sum of the time required to receive the received power response sent by the meter SM. The time required for the control unit 147a to cause the communication IF unit 1444 to transmit the power reception current request to the smart meter SM, and the control unit 147a to the communication IF unit 1444 receive the power reception current response transmitted by the smart meter SM. An example of the sum T1e1 with the time required for the operation is 32 [msec] according to "HEMS-smart meter B route operation guideline 4.0". Therefore, in Modification 1 of the embodiment, T1e1 is assumed to be 1 [sec].
T1e2 (from time t1e2 to time t1e3) is required for the control unit 147a to determine whether or not the received power current value is equal to or greater than the received power current threshold, and to create the charging power suppression information based on the determination result. It is the sum of the time, the time required to derive the charging power value based on the charging power suppression information, and the time required to derive the charging current value based on the derived charging power value.
At T1e3 (time t1e3 to time t1e4), the control unit 147a transmits information for controlling the state of the electric vehicle EV to the electric vehicle EV based on the derived charging current value through communication using the CPLT signal. and the time required for the electric vehicle EV to control the state based on the information for controlling the state of the electric vehicle EV. When the controller 147a determines that the received power current value is equal to or greater than the received power current threshold, the controller 147a changes the cycle for creating the received power current request to the short cycle T1.

In the lower part of FIG. 7, T2e1 and T2e2 are respectively shown below.
T2e1 (from time t2e1 to time t2e2) is the same as T1e1. It is the sum of the time required for the IF unit 1444 to receive the power reception current response transmitted by the smart meter SM. The time required for the control unit 147a to cause the communication IF unit 1444 to transmit the power reception current request to the smart meter SM, and the control unit 147a to the communication IF unit 1444 receive the power reception current response transmitted by the smart meter SM. An example of the sum T2e1 with the time required for the operation is 32 [msec] according to the "HEMS-smart meter B route operation guideline 4.0". Therefore, in Modification 1 of the embodiment, T2e1 is assumed to be 1 [sec].
T2e2 (time t2e2 to time t2e3) is the time required for the control unit 147a to determine whether or not the received current value is greater than or equal to the received current threshold. Here, the controller 147a determines that the received current value is less than the received current. When the control unit 147a determines that the received power current value is less than the received power current threshold, the controller 147a changes the cycle for generating the received power current request to a longer cycle T2.

In the lower part of FIG. 9, T3e1 and T3e2 are respectively shown below.
T3e1 (from time t3e1 to time t3e2) is the same as T1e1 and T2e1, and is the time required for the control unit 147a to cause the communication IF unit 1444 to transmit the received power request to the smart meter SM, and the control unit 147a is the sum of the time required for the communication IF unit 1444 to receive the power reception current response transmitted by the smart meter SM. The time required for the control unit 147a to cause the communication IF unit 1444 to transmit the power reception current request to the smart meter SM, and the control unit 147a to the communication IF unit 1444 receive the power reception current response transmitted by the smart meter SM. An example of the sum T3e1 with the time required for the operation is 32 [msec] according to the "HEMS-smart meter B route operation guideline 4.0". Therefore, in Modification 1 of the embodiment, T3e1 is assumed to be 1 [sec].
T3e2 (from time t3e2 to time t3e3) is the same as T2e2, and is the time required for the control unit 147a to determine whether the received current value is equal to or greater than the received current threshold. Here, the controller 147a determines that the received current value is less than the received current. When the control unit 147a determines that the received power current value is less than the received power current threshold, the controller 147a changes the cycle for generating the received power current request to a longer cycle T2. Here, since the control unit 147a sets the cycle for creating the received current request to the cycle T2, the setting is maintained.

According to FIG. 7, by setting T1<Tb, if t1e1≦tb1, the electric vehicle EV can control the state of the electric vehicle EV before the ampere breaker AB trips. It is possible to prevent the ampere breaker AB from tripping.
Further, by setting T1<Tb, if t1e1>tb1, T1e2 can be adjusted so that t1d4<tb2. Since the electric vehicle EV can control the state of the electric vehicle EV before the ampere breaker AB trips, it is possible to prevent the ampere breaker AB from tripping. Since T1e1 and T1e3 are defined and difficult to adjust, T1e2 is adjusted.
Further, by setting T2<Tb, if t2e1≦tb1, the electric vehicle EV can control the state of the electric vehicle EV before the ampere breaker AB trips. It can prevent tripping.
Further, by setting T2<Tb, if t2e1>tb1, T2e2 can be adjusted so that t2d3<tb2. Since the electric vehicle EV can control the state of the electric vehicle EV before the ampere breaker AB trips, it is possible to prevent the ampere breaker AB from tripping. Since T2e1 is defined and difficult to adjust, T2e2 is adjusted.

[Operation of charging system]
FIG. 8 is a sequence chart showing an example of the operation of the charging system according to Modification 1 of the embodiment. In the example shown in FIG. 8, the operation after the electric vehicle EV is connected to the charging outlet CE and charging is started will be described.
Since steps S3 to S6 described with reference to FIG. 5 can be applied to steps S11 to S14, descriptions thereof will be omitted here.
(Step S15)
In the CBOX 14a, the communication IF unit 1444 receives the power reception current response transmitted by the smart meter SM. The management unit 1475a acquires the power reception current response received by the communication IF unit 1444 . The management unit 1475a determines whether or not the received power current value is equal to or greater than the received power current threshold based on the information indicating the received power current included in the acquired power receiving current response.
(Step S16)
In the CBOX 14 a , the management unit 1475 a creates charging power suppression information and outputs the created charging power suppression information to the power amount control unit 1474 when the received current value is equal to or greater than the received current threshold. The power amount control unit 1474 acquires the charging power suppression information output by the management unit 1475a, and starts suppressing the charging power based on the acquired charging power suppression information. The power amount control unit 1474 creates information indicating the charging current value based on the charging power suppression information.
(Step S17)
In CBOX 14 a , power amount control section 1474 outputs information indicating the created charging current value to CPLT section 1472 . The CPLT unit 1472 acquires information indicating the charging current value output by the power amount control unit 1474, and transmits the acquired information indicating the charging current value to the electric vehicle EV.
(Step S18)
In the CBOX 14a, when the management unit 1475a determines that the received current value is equal to or greater than the received current threshold, the management unit 1475a changes the cycle T0 for generating the received current request to a cycle T1 that is shorter than the cycle T0. When the management unit 1475a determines that the received current value is less than the received current threshold, the management unit 1475a changes the cycle T0 for generating the received current request to a cycle T2 that is longer than the cycle T0. After that, the process moves to step S11.

In the first modification of the above-described embodiment, when the management unit 1475a determines that the received current value is equal to or greater than the received current threshold, the cycle T0 for generating the received current request is set to a cycle shorter than the cycle T0. Although the case of changing to T1 has been described, the present invention is not limited to this example. For example, if the received current value is greater than or equal to the received current threshold and is higher than the first charging current threshold (>charging current threshold) for changing the cycle of generating the received current request, the received current The cycle for making requests may be shortened. In addition, the management unit 1475a may set a plurality of first charging current thresholds, and based on each of the set plurality of first charging current thresholds, may stepwise shorten the period for creating the power receiving current request. .
In the first modification of the above-described embodiment, when the management unit 1475a determines that the received current value is less than the received current threshold, the cycle T0 for generating the received current request is set to a cycle longer than the cycle T0. Although the case of changing to T2 has been described, the present invention is not limited to this example. For example, when the received current value is less than the received current threshold and the received current value is lower than the second charging current threshold (<charging current threshold) for changing the cycle of generating the received current request, the received current The cycle for making requests may be lengthened. In addition, the management unit 1475a may set a plurality of second charging current thresholds, and based on each of the plurality of set second charging current thresholds, may change the cycle of generating the receiving current request to be longer in stages. .

According to the modification 1 of the embodiment, in the power cable 1a, the management unit 1475a changes the cycle of generating the receiving current request based on whether or not the charging power of the moving body is suppressed. By configuring in this manner, the cycle of generating the received current request can be shortened when the charging power of the moving body is suppressed, and the cycle of generating the receiving current request can be lengthened when the received power of the moving body is not suppressed. Therefore, it is possible to adjust the cycle of generating the received current request according to the situation.
Furthermore, in the power cable 1a, the management unit 1475a shortens the cycle of generating the power reception current request when the power reception current value is higher than the first charging current threshold. By configuring in this way, when the power receiving current value is high, the power receiving current request can be transmitted in a short cycle, so that it is possible to cope with changes in the power receiving current.
Furthermore, in the power cable 1a, the management unit 1475a lengthens the cycle of generating the power reception current request when the power reception current value is lower than the second charging current threshold. With this configuration, when the power receiving current value is low, the power receiving current request can be transmitted in a long cycle, so the number of times the power receiving current request is transmitted can be reduced.

(Modification 2 of Embodiment)
(charging system)
FIG. 1 can be applied to the outline of the charging system according to Modification 2 of the embodiment. However, instead of the power cable 1, a power cable 1b is provided.
FIG. 9 is a block diagram illustrating an example of a power cable and a smart meter included in a charging system according to Modification 2 of the embodiment.
Compared to the power cable 1 of the embodiment, the power cable 1b according to Modification 2 of the embodiment includes a CBOX 14b instead of the CBOX 14, a control unit 147b instead of the control unit 147, and a management unit 1475 instead of It differs in that it includes a management unit 1475b and includes a power amount control unit 1474b instead of the power amount control unit 1474. FIG.

The management unit 1475b can apply the management unit 1475b. However, the management unit 1475b is different in that it performs the following processing when it acquires the received power current response received by the communication IF unit 1444 . The management unit 1475b determines whether or not the received power current value is equal to or greater than the received power current threshold based on the information indicating the received power current included in the acquired power receiving current response. When the management unit 1475b determines that the received current value is equal to or greater than the received current threshold, the management unit 1475b creates charging power suppression information and outputs the created charging power suppression information to the power amount control unit 1474b. If the management unit 1475b determines that the received current value is less than the received current threshold, the management unit 1475b creates charging power promotion information and outputs the created charging power promotion information to the power amount control unit 1474b.
The power amount control unit 1474b can apply the power amount control unit 1474. However, when the power amount control unit 1474b acquires either the charging power suppression information or the received power promotion information output by the management unit 1475b, Perform the following processing. When the charging current suppression information is acquired, the power amount control unit 1474b changes the direction to suppress the charging power of the electric vehicle EV based on the acquired charging power suppression information. Specifically, when the electric power amount control unit 1474b suppresses the charging power of the electric vehicle EV, the charging power is suppressed based on a predetermined ratio such as 1/2 or 1/3 of the current charging power. or to a predetermined value such as 6A or 0A. Further, when the charging current promotion information is acquired, the power amount control unit 1474b changes the charging power of the electric vehicle EV to the direction of promoting the charging power based on the acquired charging power promotion information. Specifically, when promoting the charging power of the electric vehicle EV, the power amount control unit 1474b changes to the direction of suppressing the charging power based on a predetermined ratio such as double or triple the current charging power. Alternatively, the charging power may be changed to a predetermined value such as 6A, 12A, or 18A.
[Procedure for controlling charging current to electric vehicle EV]
As for the procedure for controlling the charging current to the electric vehicle EV, the embodiment described with reference to FIGS. 3 and 4 can be applied.

[Operation of charging system]
FIG. 10 is a sequence chart showing an example of the operation of the charging system according to Modification 2 of the embodiment. In the example shown in FIG. 10, the operation after the electric vehicle EV is connected to the charging outlet CE and charging is started will be described.
Since steps S3 to S6 described with reference to FIG. 5 can be applied to steps S21 to S24, descriptions thereof will be omitted here.
(Step S25)
In CBOX 14b, communication IF unit 1444 receives the power reception current response transmitted by smart meter SM. The management unit 1475b acquires the received power current response received by the communication IF unit 1444 . The management unit 1475b determines whether or not the received power current value is equal to or greater than the received power current threshold based on the information indicating the received power current included in the acquired power receiving current response.
(Step S26)
In the CBOX 14b, the management unit 1475b creates charging power suppression information and outputs the created charging power suppression information to the power amount control unit 1474b when the received current value is equal to or greater than the received current threshold. The power amount control unit 1474b acquires the charging power suppression information output by the management unit 1475b, and starts suppressing the charging power based on the acquired charging power suppression information. The power amount control unit 1474b creates information indicating the charging current value based on the charging power suppression information.
(Step S27)
In the CBOX 14b, the management unit 1475b creates charging power promotion information and outputs the created charging power promotion information to the power amount control unit 1474b when the received current value is less than the received current threshold. The power amount control unit 1474b acquires the charging power promotion information output by the management unit 1475b, and starts promoting the charging power based on the acquired charging power promotion information. The power amount control unit 1474b creates information indicating the charging current value based on the charging power promotion information.
(Step S28)
In the CBOX 14 b , the power amount control section 1474 b outputs information indicating the created charging current value to the CPLT section 1472 . The CPLT unit 1472 acquires information indicating the charging current value output by the power amount control unit 1474b, and transmits the acquired information indicating the charging current value to the electric vehicle EV. After that, the process moves to step S21.

In the modification 2 of the embodiment described above, the management unit 1475b outputs charging power suppression information to the power amount control unit 1474b when determining that the received current value is equal to or greater than the received current threshold. Although the power amount control unit 1474b acquires the charging power suppression information output by the management unit 1475b and suppresses the charging power of the electric vehicle EV based on the acquired charging power suppression information, the case is limited to this example. can't For example, when suppressing the charging power of the electric vehicle EV, the power amount control unit 1474b may change the charging power value at a predetermined ratio based on the received power current value, or reduce the charging power value to a predetermined value. You may change the power value. For example, the predetermined ratio may change from a high value to a low value as the received current value decreases from a large value. Further, for example, the predetermined value may be changed from a high value to a low value as the receiving current value decreases from a large value.
In the modified example 2 of the embodiment described above, the management unit 1475b outputs charging power promotion information to the power amount control unit 1474b when determining that the received current value is less than the received current threshold. Although the power amount control unit 1474b acquires the charging power promotion information output by the management unit 1475b and promotes the charging power of the electric vehicle EV based on the acquired charging power promotion information, the case is limited to this example. can't For example, when promoting the charging power of the electric vehicle EV, the power amount control unit 1474b may change the charging power value at a predetermined ratio based on the received power current value, or reduce the charging power value to a predetermined value. You may change the power value. For example, the predetermined ratio may change from a high value to a low value as the received current value decreases from a large value. Further, for example, the predetermined value may be changed from a high value to a low value as the receiving current value decreases from a large value.

According to the modification 2 of the embodiment, in the power cable 1b, when changing the charging power to the moving body, the control unit 147b changes the charging power value at a predetermined rate based on the received current value. . By configuring in this way, it is possible to prevent a sudden change in the charging power value.
In the power cable 1b, the control unit 147b reduces the charging power value to a predetermined value based on the receiving current value when changing the charging power of the moving body. By configuring in this way, it is possible to prevent a sudden change in the charging power value.

In addition, the control unit 147, the control unit 147a, and the control unit 147b according to the embodiment include a computer system. The control unit 147, the control unit 147a, and the control unit 147b record a program for realizing the above processing on a computer-readable recording medium, and cause the computer system to read and execute the program recorded on the recording medium. By doing so, the various processes described above may be performed. Note that the “computer system” referred to here may include hardware such as an OS and peripheral devices. In addition, "computer-readable recording medium" means writable non-volatile memory such as flexible disk, magneto-optical disk, ROM, flash memory, etc., portable medium such as CD-ROM, hard disk built in computer system, etc. storage device.

Furthermore, "computer-readable recording medium" means a volatile memory (e.g., DRAM (Dynamic Random Access Memory)), which holds the program for a certain period of time, is also included. Further, the above program may be transmitted from a computer system storing this program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in a transmission medium. Here, the "transmission medium" for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. Further, the program may be for realizing part of the functions described above. Further, it may be a so-called difference file (difference program) that can realize the above-described functions in combination with a program already recorded in the computer system.

As described above, the mode for carrying out the present invention has been described using the embodiments, but the present invention is not limited to such embodiments at all, and various modifications and replacements can be made without departing from the scope of the present invention. can be added. For example, modifications and the like shown in the embodiment can be applied to other embodiments. Further, modification 1 of the embodiment and modification 2 of the embodiment may be combined. Further, in the embodiment, the storage battery BT mounted on the electric vehicle EV was described as an example of the storage battery. may be the target of

DESCRIPTION OF SYMBOLS 1, 1a, 1b... power cable, 11... plug, 12... connector, 14, 14a, 14b... CBOX, 141... measurement part, 142... earth leakage breaker, 143... switch, 144... communication part, 147, 147a, 147b... control unit 1474, 1474b... power amount control unit 1475, 1475a, 1475b... management unit PS... power supply facility AB... ampere breaker CE... charging outlet LN1, LN2, LN3... cable EV... electricity car

Claims (7)

A power cable comprising a plug connected to a power supply side and a connector connectable to a mobile object, and supplying power to the mobile object via the plug and the connector,
A receiving current request is created, which is a signal requesting a receiving current value, which is power supplied from the main trunk, to a smart meter that monitors the current flowing through the main trunk, and the smart meter transmits in response to the created receiving current request. a management unit that determines whether or not to suppress the charging power of the moving object based on the received power current value included in the received power current response;
The receiving current request created by the management unit is transmitted to the smart meter, the receiving current response transmitted by the smart meter in response to the transmitted receiving current request is received, and a self-power cable is provided via the connector. a communication unit that communicates using a communication path between the mobile body electrically connected to
When the management unit determines to suppress the charging power of the moving object, a charging current value is derived based on the received power current value, and the derived charging current value is transmitted to the mobile object using the communication path. a control unit that notifies the moving body;
with
An ampere breaker that cuts off a current detects a current flowing through the main trunk until it cuts off the current based on the detected current, and the communication unit transmits the received current request. a time required for receiving the received power response transmitted by the smart meter in response to the transmitted received power request, and a time after the control unit transmits information indicating the charging current value to the moving body , the power cable, wherein the controller adjusts the time required for deriving the charging current value based on the time required for the moving body to change the charging current. 2. The power cable according to claim 1, wherein said management unit changes a cycle of generating said receiving current request based on whether or not said charging power of said moving body is to be suppressed. 3. The power cable according to claim 2, wherein said management unit shortens a cycle of generating said received current request when said received current value is higher than a first charging current threshold. 4 . The power cable according to claim 2 , wherein the management unit lengthens a cycle of generating the received current request when the received current value is lower than a second charging current threshold. 5. The control unit according to any one of claims 1 to 4, wherein when changing the charging power to the moving object, the control unit changes the charging power value at a predetermined ratio based on the received current value. power cable described in . 4. The control unit according to any one of claims 1 to 3, wherein when changing the charging power to the moving object, the control unit changes the charging power value to a predetermined value based on the received current value. power cable described in . A charging control method comprising a plug connected to a power supply side and a connector connectable to a mobile body, wherein a power cable that supplies power to the mobile body via the plug and the connector executes a charging control method,
creating a received current request, which is a signal requesting a received current value, which is the power supplied by the main trunk, to a smart meter that monitors the current flowing through the main trunk;
a step of transmitting the generated received power request to the smart meter;
receiving a power receiving current response transmitted by the smart meter in response to the transmitted power receiving current request;
determining whether or not to suppress the charging power of the moving body based on the received power current value included in the received power current response;
When it is determined that the charging power of the mobile body is to be suppressed, a charging current value is derived based on the received power current value, and information indicating the derived power receiving current value is transmitted to the mobile body using a communication path. and notifying
has
In the step of notifying, the ampere breaker that cuts off the current detects the current flowing through the main trunk until it cuts off the current based on the detected current, and transmits the received current request. and changing the charging current after transmitting information indicating the charging current value and the time required for receiving the receiving current response transmitted by the smart meter in response to the transmitted receiving current request to the moving object. and adjusting the time required to derive the charging current value based on the time required to

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