JP7261983B2 - POWER SUPPLY DEVICE, POWER SUPPLY SYSTEM, POWER SUPPLY METHOD, PROGRAM - Google Patents

Description

TECHNICAL FIELD The present disclosure generally relates to a power supply device, power supply system, power supply method, and program, and more particularly to a power supply device, power supply system, power supply method, and program for charging a storage battery of a mobile object.

Patent Literature 1 discloses a vehicle charging system capable of charging a plurality of vehicles with power supplied from a power system. A vehicle charging system includes a charging controller, a plurality of charging cables, and a plurality of regulators.

Vehicles equipped with storage batteries are detachably connected to the plurality of charging cables. A plurality of regulators regulate charging current supplied to the vehicle through corresponding ones of the plurality of charging cables.

The charging control device includes a control section. The control unit calculates idle power, which is the difference between the upper limit power of the electric power system and the power consumed by loads other than the vehicle, that is, the sum of the charging power supplied to the vehicle via the plurality of adjusting devices at any given point in time. Control multiple regulators so that they are not exceeded.

The control unit of the charging control device monitors changes in the idle power at relatively short first time intervals, and depending on the change in the idle power, only some of the adjusting devices that are supplying the charging current. Increase or decrease the charging current.

JP 2013-225971 A

In a power supply system such as the vehicle charging system of Patent Document 1, even if the control unit of the charging control device transmits a command to change the charging current to a certain adjusting device, whether or not the command is rejected by the adjusting device. cannot be confirmed. Therefore, there is room for improvement in the reliability of power supply control.

The present disclosure has been made in view of the above reasons, and aims to improve the reliability of power supply control.

A power supply device according to an aspect of the present disclosure supplies charging power to a mobile object. The moving body has a power section, a storage battery that supplies power to the power section, and a charging circuit that charges the storage battery with charging power that does not exceed a maximum value. The power supply device includes an upper limit value receiving unit, a maximum value transmitting unit, a prohibiting unit, and a replying unit. The upper limit value receiving unit receives an upper limit value signal indicating an upper limit value of the maximum value from an external device. The maximum value transmission unit transmits a maximum value signal indicating the maximum value to the moving object based on the upper limit value. The prohibition unit transmits another maximum value signal indicating a maximum value different from the maximum value to the moving body until a predetermined prohibition period elapses after transmitting the maximum value signal. prohibited. The reply unit sends a non-acceptance signal to the external device when the upper limit value receiving unit receives another upper limit value signal indicating an upper limit value different from the upper limit value from the external device within the prohibition period. Reply.

A power supply system according to an aspect of the present disclosure includes the power supply device and the external device.

A power supply method according to an aspect of the present disclosure is performed by a power supply device that supplies charging power to a mobile body. The moving body has a power section, a storage battery that supplies power to the power section, and a charging circuit that charges the storage battery with charging power that does not exceed a maximum value. The power supply method includes an upper limit value receiving step, a maximum value transmitting step, a prohibiting step, and a replying step. In the upper limit receiving step, an upper limit signal indicating the upper limit of the maximum value is received from an external device. In the maximum value transmission step, a maximum value signal indicating the maximum value is transmitted to the moving object based on the upper limit value. In the prohibition step, transmission of another maximum value signal indicating a maximum value different from the maximum value to the moving body is prohibited until a predetermined prohibition period elapses after transmission of the maximum value signal. In the returning step, when another upper limit value signal indicating an upper limit value different from the upper limit value is received from the external device within the prohibition period, a non-acceptance signal is returned to the external device.

A program according to an aspect of the present disclosure is a program for causing one or more processors to execute the power supply method.

A power supply system according to an aspect of the present disclosure includes a power supply device and an external device. The power supply device supplies charging power to the mobile body. The moving body has a power section, a storage battery that supplies power to the power section, and a charging circuit that charges the storage battery with charging power that does not exceed a predetermined maximum value. The external device transmits an upper limit signal indicating an upper limit of the maximum value. The power supply device includes an upper limit value receiver and a maximum value transmitter. The upper limit receiver receives the upper limit signal from the external device. The maximum value transmission unit transmits a maximum value signal indicating the maximum value to the moving object based on the upper limit value. The external device includes an upper limit transmission unit and a prohibition unit. The upper limit value transmission unit transmits the upper limit value signal. The prohibition unit sends another upper limit value signal indicating an upper limit value different from the upper limit value from the upper limit value sending unit until a predetermined standby time elapses after the upper limit value sending unit sends the upper limit signal. are prohibited from sending

According to the present disclosure, there is an advantage that the reliability of power supply control can be improved.

FIG. 1 is a block diagram showing the configuration of the power supply system of one embodiment. FIG. 2 is a schematic diagram showing a usage example of the same power supply system. FIG. 3 is a block diagram showing a power supply device used in the same power supply system. FIG. 4 is a time chart for explaining the operation of the power supply device used in the same power supply system. FIG. 5 is a flowchart for explaining the operation of the same power supply system. FIG. 6 is a block diagram showing the configuration of the power supply system of Modification 2. As shown in FIG. FIG. 7 is a block diagram showing the configuration of the power supply system of Modification 3. As shown in FIG. FIG. 8 is a block diagram showing the configuration of a power supply device according to one modification.

A power supply device 1 according to an embodiment and a power supply system 10 including the power supply device 1 will be described below with reference to the drawings.

(1) Overview The power supply system 10 is installed in residential facilities such as detached houses or collective housing, or in non-residential facilities such as offices, stores, nursing homes, etc. It controls power supply (charging) to 3 (vehicle 30, etc.). In this embodiment, as an example, as shown in FIG. 2, a case where the power supply system 10 is introduced into a house H1, which is a detached house, will be described.

As shown in FIG. 1, the power supply system 10 includes a power supply device 1 and a device control device 2 (external device).

The power supply device 1 is a device that supplies charging power to the moving object 3 .

The moving body 3 includes a power unit such as an electric motor (motor), and a storage battery 300 as a power source that supplies electric power to the power unit. The moving body 3 converts electrical energy (electric power) output from the storage battery 300 into mechanical energy (driving force) in the power section, and uses this mechanical energy to move. The mobile object 3 has a charging circuit 301 . Charging circuit 301 charges storage battery 300 with charging power that does not exceed a predetermined maximum value.

The mobile object 3 is a vehicle 30 here. Vehicle 30 is, for example, an electric vehicle that runs using electrical energy stored in storage battery 300 . An “electric vehicle” as used in the present disclosure is, for example, an electric vehicle that runs on the output of an electric motor, or a plug-in hybrid vehicle that runs on a combination of the output of an engine and the output of an electric motor. The electric vehicle may be a senior car, a two-wheeled vehicle (electric motorcycle), a tricycle, an electric bicycle, or the like.

As shown in FIG. 1 , the power supply device 1 includes a first communication section 11 , a vehicle communication section 12 and a processing section 13 .

The first communication unit 11 is communicably connected to the device control device 2 . The first communication unit 11 receives the upper limit value signal from the device control device 2 . The upper limit signal includes upper limit information indicating the upper limit. The upper limit value is a value for designating the maximum value of charging power with which the charging circuit 301 of the vehicle 30 charges the storage battery 300 when the power supply device 1 charges the storage battery 300 of the vehicle 30 . Here, the upper limit specifies the maximum value of the charging current. In short, the power supply device 1 includes an upper limit value receiving unit (first communication unit 11 ) that receives an upper limit value signal from the device control device 2 .

Vehicle communication unit 12 is communicably connected to vehicle 30 . Vehicle communication unit 12 transmits a maximum value signal to vehicle 30 . The maximum value signal includes maximum value information indicating the maximum value. The maximum value specified by the maximum value signal is the maximum value of charging power (charging current) with which the charging circuit 301 of the vehicle 30 charges the storage battery 300 described above. The maximum value specified by the maximum value signal is set by the processing unit 13 based on the upper limit value included in the upper limit value signal received by the first communication unit 11 . In short, the power supply device 1 includes a maximum value transmission unit (vehicle communication unit 12) that transmits a maximum value signal indicating a predetermined maximum value to the vehicle 30 based on the upper limit value.

The processing unit 13 includes a clock unit 131 , a prohibition unit 132 and a reply unit 133 .

The timer 131 measures the elapsed time since the vehicle communication unit 12 transmitted the maximum value signal. The prohibition unit 132 keeps the vehicle communication unit 12 from turning off the vehicle 30 until the elapsed time measured by the clock unit 131 reaches the predetermined prohibition period, in other words, until the predetermined prohibition period elapses after the transmission of the maximum value signal. It is forbidden to send another maximum value signal to indicate a maximum value different from the current maximum value. The reply unit 133 returns a non-acceptance signal to the device control device 2 when the first communication unit 11 receives another upper limit value signal from the device control device 2 within the prohibition period.

According to the power supply device 1 according to the present embodiment, the processing unit 13 receives an upper limit value signal indicating an upper limit value (referred to as a “first upper limit value” for convenience) from the device control device 2 during a period other than the prohibited period. Upon receipt, a maximum value (for convenience, referred to as "first maximum value") is set based on the first upper limit value. Then, the processing unit 13 causes the vehicle communication unit 12 to transmit a maximum value signal indicating the first maximum value to the vehicle 30 . As a result, the maximum value of the charging power with which the charging circuit 301 of the vehicle 30 charges the storage battery 300 is changed to the first maximum value.

On the other hand, even if the processing unit 13 receives an upper limit value signal indicating an upper limit value different from the current upper limit value (referred to as a “second upper limit value” for convenience) from the device control device 2 during the prohibition period, A maximum value based on the second upper limit value (referred to as a “second maximum value” for convenience) is not set. Therefore, the processing unit 13 does not transmit the maximum value signal indicating the second maximum value to the vehicle 30 even if the upper limit value signal indicating the second upper limit value is received from the device control device 2 during the prohibition period. Therefore, the maximum value of the charging power with which the charging circuit 301 of the vehicle 30 charges the storage battery 300 does not change from the current value. Then, the processing unit 13 causes the first communication unit 11 to return a non-acceptance signal to the device control device 2 in response to receiving the upper limit value signal indicating the second upper limit value from the device control device 2 during the prohibition period.

In this way, the power supply device 1 receives the maximum value signal (the “second maximum If the maximum value signal indicating the value”) is not transmitted, a non-acceptance signal is returned to the device control device 2 . Therefore, the equipment control device 2 can know that the acceptance of the setting has been rejected even though the power supply device 1 has normally received the command to change the maximum value due to the transmission of the upper limit value signal. . Therefore, the device control device 2 can perform processing such as retransmitting the upper limit value signal after receiving the non-acceptance signal, for example, thereby improving the reliability of the power supply control.

Further, when the power supply device 1 transmits the maximum value signal indicating the maximum value (first maximum value) to the vehicle 30, the power supply device 1 continues to display a different maximum value (second maximum value) until the timing of the prohibition period ends. do not send the maximum value signal. In short, in the power supply system 10 of the present embodiment, the maximum value of the charging current is not changed until the prohibition period elapses after the maximum value of the charging current is changed. Therefore, the possibility of fluctuation (increase or decrease) in the charging current is reduced, the possibility of adversely affecting charging control is reduced, and the reliability of power supply control is improved.

(2) Details The power supply system 10 according to the present embodiment will be described in more detail below with reference to FIGS. 1 to 5. FIG.

(2.1) Overall Configuration First, the overall configuration of the power supply system 10 will be described with reference to FIGS. 1 and 2. FIG.

As described above, the power supply system 10 includes the power supply device 1 and the device control device 2 . In this embodiment, the power supply device 1 and the device control device 2 cooperate with each other to realize the function of the power supply system 10 .

The power supply device 1 and the equipment control device 2 are configured to be able to communicate with each other. In the present disclosure, “communicable” means that information can be exchanged directly or indirectly via a network, a repeater, or the like, by an appropriate communication method such as wired communication or wireless communication. That is, the power supply device 1 and the device control device 2 can exchange information with each other. In this embodiment, the power supply device 1 and the device control device 2 are bi-directionally communicable with each other. Both sending information to the device 1 are possible.

As shown in FIG. 2, the equipment control device 2 is installed inside the house H1. The device control device 2 is a device that controls various devices (including devices and facilities) to be controlled, including at least the power supply device 1 . The device control device 2 outputs to the power supply device 1 a “charging start signal” for instructing the start of charging and a “charging stop signal” for instructing the stop of charging. It controls the start and stop of charging of the storage battery 300 of the vehicle 30 by the device 1 .

The power supply device 1 is charging equipment for charging the vehicle 30 . The power supply device 1 is installed outside (outdoors) of the house H1 by being attached to an outer wall, a support, or the like of the house H1. A charging cable 101 is electrically connected to the power supply device 1 . Charging cable 101 has charging connector 102 at its distal end. As shown in FIGS. 2 and 3 , charging connector 102 is removably connected to a charging inlet of vehicle 30 . Power supply device 1 is electrically connected to vehicle 30 via charging cable 101 while charging connector 102 is connected to the charging inlet, and thus can supply power to vehicle 30 via charging cable 101 . becomes, and charging of the storage battery 300 becomes possible.

Moreover, in the power supply system 10 according to the present embodiment, the device control device 2 can control various devices other than the power supply device 1 . Specifically, as shown in FIG. 2, the device control device 2 includes a distribution board 61 installed in the house H1, a load 62 including electric devices such as lighting fixtures and air conditioners, and a photovoltaic power generation facility 7. is configured to be able to communicate with Here, the device control device 2 is connected to the router 64 and communicates with the distribution board 61 and the load 62 directly or indirectly via the router 64 . As a result, the equipment control device 2 acquires information about the state of the load 62 (for example, turning on/off in the case of a lighting fixture) from the load 62, and transmits information for controlling the load 62 to the load 62. It is possible to

A power supply device 1 and a load 62 are electrically connected to the distribution board 61 . Further, the power distribution board 61 is electrically connected to a power system 63 such as a commercial power supply and the photovoltaic power generation equipment 7 . Thereby, the distribution board 61 can supply the power supplied from the power system 63 or the solar power generation equipment 7 to the power supply device 1 and other loads 62 .

In this embodiment, the photovoltaic power generation facility 7 has a solar cell 71 , a power storage device 72 and a power conditioner 73 . The solar cell 71 outputs power corresponding to the amount of solar radiation to the solar cell 71 as generated power. The power storage device 72 is configured to store power generated by the solar cell 71 and power supplied from the power system 63 . The power storage device 72 outputs power (electrical energy) accumulated in the power storage device 72 as discharged power. The power conditioner 73 converts the power generated by the solar cell 71 or the discharged power of the power storage device 72 into AC power and outputs the AC power to the distribution board 61 . Moreover, the power conditioner 73 may convert the AC power supplied from the distribution board 61 into DC power to charge the power storage device 72 during a time period when the electricity rate is low, such as at night.

The photovoltaic power generation facility 7 is configured to be interconnected with the grid. “Grid connection” as used in the present disclosure refers to a state in which a power generation facility such as the photovoltaic power generation facility 7 is electrically connected to the power system 63, and both the power generation facility and the power system 63 are connected to the load. It means a state in which power can be supplied to 62 . That is, the photovoltaic power generation facility 7 supplies the power generated by the solar cell 71 (or the discharged power of the power storage device 72 ) to the load 62 together with the power from the power system 63 or instead of the power from the power system 63 .

The distribution board 61 divides the power supplied from the power system 63, the power supplied from the photovoltaic power generation equipment 7, and the power consumption of the load 62 and the like (including the power supply device 1 and the photovoltaic power generation equipment 7) into current It has a function of measuring with a sensor or the like. Therefore, the device control device 2 communicates with the distribution board 61 to distribute information about the power supplied from the power system 63, the power supplied from the solar power generation equipment 7, and the power consumption of the load 62 and the like. It can be obtained from the board 61 as appropriate.

Further, in this embodiment, the device control device 2 is connected to a network 65 such as the Internet via a router 64 . As a result, the device control device 2 can communicate with the information terminal 4 inside the house H1 via the router 64 and can communicate with the information terminal 4 outside the house H1 via the router 64 and the network 65 . The information terminal 4 is, for example, a terminal such as a smart phone or a tablet terminal. A server 5 is further connected to the network 65 . As a result, the device control device 2 can communicate with the information terminal 4 and the server 5 .

(2.2) Device Control Device Next, the configuration of the device control device 2 will be described. As described above, in this embodiment, the device control device 2 is a part of the power supply system 10 and configures the power supply system 10 together with the power supply device 1 .

As shown in FIG. 1, the device control device 2 includes a second communication section 21, an upper limit setting section 22, a control section 23, a display control section 24, an input interface 25, a display section 26, and an external communication section 27. there is

The upper limit value setting unit 22, the control unit 23, and the display control unit 24 of the device control device 2 are configured by microcontrollers having one or more processors and memories. In other words, at least a part of the device control device 2 is realized by a computer system having one or more processors and memory, and the one or more processors execute a program stored in the memory, whereby the computer system functions as at least part of the device control device 2 . Although the program is pre-recorded in the memory of the device control device 2 here, it may be provided through an electric communication line such as the Internet or recorded in a non-temporary recording medium such as a memory card. At least part of the device control device 2 may be configured by, for example, an FPGA (Field-Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit).

The second communication unit 21 communicates with the power supply device 1 directly or indirectly via a network, a repeater, or the like. As a communication method between the second communication unit 21 and the power supply device 1, an appropriate communication method such as wireless communication or wired communication is adopted. In this embodiment, as an example, the communication method between the second communication unit 21 and the power supply device 1 is wired communication conforming to a communication standard such as a wired LAN (Local Area Network). A communication protocol for communication between the second communication unit 21 and the power supply device 1 is, for example, Ethernet (registered trademark) or ECHONET Lite (registered trademark).

The upper limit setting unit 22 sets the upper limit. As described above, the upper limit value is a value for specifying the maximum value of charging power with which the charging circuit 301 of the vehicle 30 charges the storage battery 300 when the power supply device 1 charges the storage battery 300 of the vehicle 30 . be.

The upper limit value setting unit 22 sets the upper limit value based on the information about the power supplied from the power system 63, the power supplied from the solar power generation equipment 7, the power consumption of the load 62, etc., acquired from the distribution board 61. settings. The upper limit setting unit 22 sets the upper limit so that the current flowing through the main breaker of the distribution board 61, that is, the supply current supplied from the power system 63 to the distribution board 61 does not exceed the rated current of the main breaker. set the value. For example, the upper limit setting unit 22 sets the upper limit to a value obtained by subtracting the difference between the total current consumption of the load 62 and the current supplied from the photovoltaic power generation equipment 7 from the rated current of the main breaker. Here, the "total current consumption of the load 62" is the total amount of current flowing from the distribution board 61 to one or more loads 62 (not including the power supply device 1) connected to the distribution board 61 (total quantity). The “current supplied from the photovoltaic power generation facility 7 ” is the current flowing from the power conditioner 73 of the photovoltaic power generation facility 7 to the distribution board 61 . The “difference between the total current consumption of the load 62 and the current supplied from the photovoltaic power generation equipment 7” is a value obtained by subtracting the current supplied from the photovoltaic power generation equipment 7 from the total current consumption of the load 62 . When the current supplied from the photovoltaic power generation facility 7 is larger than the total current consumption of the load 62, the "difference between the total current consumption of the load 62 and the current supplied from the photovoltaic power generation facility 7" is negative. can be the value of

The control unit 23 causes the second communication unit 21 to transmit the charging start signal and the charging stop signal to the power supply device 1 according to the operation signal from the input interface 25 . That is, when control unit 23 receives an operation signal for stopping charging of storage battery 300 during charging of storage battery 300, control unit 23 outputs a charging stop signal. Further, when control unit 23 receives an operation signal for starting charging of storage battery 300 while charging of storage battery 300 is stopped, control unit 23 outputs a charging start signal.

Further, the control unit 23 causes the second communication unit 21 to transmit an upper limit signal indicating the upper limit set by the upper limit setting unit 22 to the power supply device 1, for example, when transmitting the charging start signal. Further, when the upper limit setting unit 22 changes the upper limit, the control unit 23 causes the second communication unit 21 to transmit an upper limit signal indicating the changed upper limit to the power supply device 1 . Further, when receiving the non-acceptance signal from the power supply device 1, the control unit 23 waits for the same length of time as the prohibition period, and then transmits the upper limit signal from the second communication unit 21 to the power supply device 1 ( resend). The length of the prohibited period is stored, for example, in the memory of the microcontroller that constitutes the control section 23 .

The display control unit 24 performs control for displaying various screens on the display unit 26 . That is, the display control unit 24 generates a screen to be displayed on the display unit 26 and controls the display unit 26 to display various screens on the display unit 26 . A “screen” as used in the present disclosure means an image (including various objects, characters, etc.) displayed on the display unit 26 . In this embodiment, the display control unit 24 displays a setting screen for allowing the user to operate the input interface 25 . The display control unit 24 may display these screens on a display unit of an external device such as the information terminal 4 instead of or in addition to the display unit 26 .

The input interface 25 receives a user's operation and outputs an operation signal according to the user's operation. A user's "operation" in the present disclosure includes operation on a touch panel, mechanical switch, or the like, voice input, gesture, or the like. Therefore, the input interface 25 is implemented by, for example, a touch panel display, a mechanical switch, an audio input unit, a camera, or the like. Alternatively, the input interface 25 may indirectly accept a user's operation on an external device such as the information terminal 4 through communication with the external device. Alternatively, the input interface 25 may be provided in an external device such as the information terminal 4 or the like.

The display unit 26 displays a screen generated by the display control unit 24. FIG. The display unit 26 is implemented by a display such as a liquid crystal display or an organic EL (Electro Luminescence) display. The display section 26 displays a screen according to the video signal output from the display control section 24 .

In this embodiment, the device control device 2 is equipped with a touch panel display, and the touch panel display functions as the input interface 25 and the display section 26 . However, the input interface 25 is not limited to a touch panel display, and may be, for example, a keyboard, pointing device, mechanical switch, or the like.

The external communication unit 27 communicates with external devices such as the information terminal 4 and the server 5 directly or indirectly via a network or relay device. The “external device” referred to in the present disclosure is a device that is not included in the components of the power supply system 10. As an example, in addition to the information terminal 4 and the server 5, the distribution board 61, the load 62, and the solar power generation equipment Including 7. As a communication method between the external communication unit 27 and the external device, an appropriate communication method such as wireless communication or wired communication is adopted. In this embodiment, as an example, the external communication unit 27 uses a standard such as Wi-Fi (registered trademark), Bluetooth (registered trademark), ZigBee (registered trademark), or a low-power radio that does not require a license (specified low-power radio). Adopt wireless communication that uses radio waves as a communication medium.

(2.3) Power supply device Next, the configuration of the power supply device 1 will be described. In this embodiment, the power supply device 1 is a part of the power supply system 10 and configures the power supply system 10 together with the device control device 2 .

As shown in FIG. 1 , the power supply device 1 includes a relay 14 , a protection circuit 15 and an allowable value setting section 16 in addition to a first communication section 11 , a vehicle communication section 12 and a processing section 13 .

The first communication unit 11 communicates with the device control device 2 (second communication unit 21) directly or indirectly via a network, a repeater, or the like. As a communication method between the first communication unit 11 and the device control device 2 (second communication unit 21), an appropriate communication method such as wireless communication or wired communication is adopted. In this embodiment, as an example, the communication method between the first communication unit 11 and the device control device 2 is wired communication conforming to a communication standard such as a wired LAN (Local Area Network). A communication protocol for communication between the first communication unit 11 and the device control device 2 is, for example, Ethernet (registered trademark) or ECHONET Lite (registered trademark).

The vehicle communication unit 12 communicates with the vehicle 30 directly or indirectly via a network, repeater, or the like. As a communication method between the vehicle communication unit 12 and the vehicle 30, an appropriate communication method such as wireless communication or wired communication is adopted. In this embodiment, as an example, the vehicle communication unit 12 performs wired communication with the vehicle 30 via a transmission line 1012 (described later) of the charging cable 101 . In this embodiment, as an example, the vehicle communication unit 12 performs communication for confirming the connection between the power supply device 1 and the vehicle 30, confirming the state of the vehicle 30, and the like, using at least a CPLT (Control Pilot) signal.

As shown in FIG. 3 , the relay 14 is inserted in a power supply line (feeder line 1011 to be described later) from the distribution board 61 to the storage battery 300 . Specifically, in power supply device 1 , relay 14 is inserted between a connection terminal with distribution board 61 and a connection terminal with charging cable 101 . As a result, when the relay 14 is on (conducting state), the distribution board 61 and the vehicle 30 are electrically connected, and the power supply source (the power system 63 or the solar power generation equipment 7) is connected to the vehicle 30 ( It becomes possible to supply power to the storage battery 300). On the other hand, if the relay 14 is off (disconnected state), the distribution board 61 and the vehicle 30 are electrically disconnected, and the vehicle 30 (storage battery 300) is no longer powered. The relay 14 may be either a mechanical relay having mechanical contacts or a semiconductor relay having no mechanical contacts as long as it can be controlled by the processing unit 13 . In this embodiment, as an example, the relay 14 is realized by a mechanical relay.

The protection circuit 15 is, for example, a circuit that protects the vehicle 30 and the power supply system 10 by turning off the relay 14 when an abnormality such as a short circuit or overcurrent is detected. Protection circuit 15 may have an element that cuts off the power supply to vehicle 30 , apart from relay 14 .

The allowable value setting unit 16 sets the allowable maximum value of the charging current indicated by the maximum value signal. The allowable value setting unit 16 has an input interface such as a DIP switch. In the allowable value setting unit 16, for example, the allowable value is set to one of two values (eg, 16A and 32A) according to ON/OFF of the DIP switch. Of course, the allowable value setting unit 16 may be configured so as to be able to set an allowable value among three or more values.

The processing unit 13 is composed of a microcontroller having one or more processors and memory. In other words, the processing unit 13 is realized by a computer system having one or more processors and a memory, and the computer system functions as the processing unit 13 by executing a program stored in the memory by the one or more processors. Function. Although the program is pre-recorded in the memory of the processing unit 13 here, it may be provided through an electric communication line such as the Internet or recorded in a non-temporary recording medium such as a memory card. The processing unit 13 may be configured by FPGA, ASIC, or the like, for example.

The processing unit 13 controls energization from the power supply device 1 to the vehicle 30 . As shown in FIG. 1, the processing unit 13 includes a timing unit 131, a prohibition unit 132, and a reply unit 133, as well as an opening/closing control unit 134, a maximum value determination unit 135, and a communication control unit 136. there is In FIG. 1, the timer 131, the prohibition unit 132, the reply unit 133, the open/close control unit 134, the maximum value determination unit 135, and the communication control unit 136 do not show actual configurations, and are realized by the processing unit 13. functions that are

The switching control unit 134 controls energization of the vehicle 30 by driving the relay 14 according to the charging start signal and the charging stop signal from the equipment control device 2 . Basically, when the first communication unit 11 receives a charging start signal from the device control device 2, the opening/closing control unit 134 turns on the relay 14 (conducting state), and the power supply device 1 to the vehicle 30 is switched on. By enabling energization, the storage battery 300 is charged. On the other hand, when the first communication unit 11 receives the charging stop signal from the device control device 2, the opening/closing control unit 134 turns off the relay 14 (shutdown state) to prohibit energization from the power supply device 1 to the vehicle 30. By doing so, the charging of the storage battery 300 is stopped.

The maximum value determination unit 135 determines the maximum value described above. The maximum value determination unit 135 determines the maximum value based on the upper limit value indicated by the upper limit value signal received by the first communication unit 11 . The maximum value determination unit 135 here determines the maximum value based on the upper limit value indicated by the upper limit value signal and the allowable value set by the allowable value setting unit 16 . The maximum value determining unit 135, for example, sets the smaller one of the upper limit value and the allowable value as the maximum value. In short, when the upper limit value indicated by the upper limit signal is larger than the allowable value set by the allowable value setting unit 16, the allowable value is set as the maximum value. Further, when the upper limit value indicated by the upper limit signal is changed from the current upper limit value, the maximum value determining unit 135 determines a new maximum value based on the changed upper limit value.

The communication control unit 136 controls operations of the first communication unit 11 and the vehicle communication unit 12 . The communication control unit 136 controls the first communication unit 11 to receive the charging start signal and the charging stop signal transmitted from the second communication unit 21 of the device control device 2 . The communication control section 136 controls the first communication section 11 to receive the upper limit value signal transmitted from the second communication section 21 of the device control device 2 . The communication control unit 136 also controls the vehicle communication unit 12 to communicate with the vehicle 30 using the CPLT signal. The communication control unit 136 controls the vehicle communication unit 12 to transmit a maximum value signal indicating the maximum value determined by the maximum value determination unit 135 using the CPLT signal. When the maximum value is changed by the maximum value determination unit 135, the communication control unit 136 causes the vehicle communication unit 12 to transmit a new maximum value signal based on the changed maximum value.

The timer 131 measures the elapsed time since the vehicle communication unit 12 transmitted the maximum value signal. The starting point of the elapsed time clocked by the timer 131 is the transmission start point of the maximum value signal or the change point of the maximum value signal. The “starting point of transmission of the maximum value signal” is the point of time at which transmission of the maximum value signal is started when the vehicle communication unit 12 newly starts transmission of the maximum value signal from a state in which the maximum value signal is not being transmitted. . The "change time point of the maximum value signal" is the time point at which the maximum value indicated by the maximum value signal is changed. For example, when the vehicle communication unit 12 transmits the maximum value signal indicating the first maximum value, it transmits the maximum value signal indicating the second maximum value (≠ the first maximum value). This is the point in time when transmission of the maximum value signal indicating the second maximum value is started when the state is changed to the state where the

The prohibition unit 132 waits until the elapsed time measured by the clock unit 131 reaches the prohibition period, in other words, until the prohibition period elapses after the vehicle communication unit 12 transmits the maximum value signal. prohibits another maximum signal from being sent to The length of the prohibited period is preferably 3 seconds or longer, and is set to 5 seconds here. The length of the prohibited period is stored, for example, in the memory of the microcontroller that constitutes the processing unit 13 .

The reply unit 133 causes the first communication unit 11 to reply the signal to the device control device 2 when a predetermined signal is received from the second communication unit 21 of the device control device 2 . The reply unit 133 causes the first communication unit 11 to reply to the device control device 2 at least when the upper limit signal is received from the second communication unit 21 of the device control device 2 .

Reply signals transmitted as replies to the upper limit value signal include a first signal (acceptance signal) and a second signal (non-acceptance signal).

The first signal (acceptance signal) is sent as a reply to the upper limit signal when the upper limit signal is received from the device control device 2 during a period other than the prohibition period. The acceptance signal is a so-called acknowledgment signal, and is transmitted when the upper limit value by the upper limit signal is adopted for determination of the maximum value by the maximum value determination unit 135 .

The second signal (non-acceptance signal) is transmitted as a response to the upper limit signal when the upper limit signal is received from the device control device 2 during the prohibition period. The non-acceptance signal is transmitted when the upper limit value by the upper limit signal is not adopted for determination of the maximum value by maximum value determining section 135 .

In short, when the reply unit 133 receives the upper limit value signal from the device control device 2 during a period other than the prohibition period, it returns an acceptance signal to the device control device 2 . Further, when the reply unit 133 receives the upper limit value signal from the device control device 2 during the prohibition period, it returns a non-acceptance signal to the device control device 2 .

The non-accepted signal here indicates that the upper value according to the upper value signal was not taken to determine the maximum value, in other words that the maximum value signal based on the upper value indicated by the upper value signal was not sent. , including non-acceptance information.

In addition, even when a charging start signal and a charging stop signal are received from the device control device 2, the reply unit 133 may cause the first communication unit 11 to reply with a reply signal indicating that these signals have been received. .

As described above, the power supply device 1 is electrically connected to the charging cable 101 having the charging connector 102 . In charging cable 101, power supply line 1011 through which charging current Ic flows to vehicle 30 and transmission line 1012 through which a CPLT signal is transmitted are covered with an insulating sheath. A charging connector 102 is provided at the tip of the charging cable 101 .

Power supply device 1 is electrically connected to vehicle 30 via charging cable 101 while charging connector 102 is connected to a charging inlet of vehicle 30 . As a result, power supply device 1 can supply power to vehicle 30 (storage battery 300 ) via power supply line 1011 of charging cable 101 , and can supply power to vehicle 30 via transmission line 1012 of charging cable 101 . and CPLT signals can be transmitted.

The power supply device 1 may include a charging switch. The charging switch transmits a request signal requesting transmission of a charging start signal to the device control device 2 when operated while the charging connector 102 is connected to the charging inlet of the vehicle 30 .

Vehicle 30 connected to power supply device 1 has charging circuit 301 as described above. The charging circuit 301 is a circuit that receives power from the power supply device 1 and charges the storage battery 300 . Vehicle 30 also includes a charging ECU (Electronic Control Unit) 302 that controls charging circuit 301 based on a CPLT signal transmitted via transmission line 1012 .

(2.4) Communication between Power Supply Device and Vehicle Next, basic communication processing when the power supply device 1 charges the storage battery 300 of the vehicle 30 will be described with reference to the time chart of FIG.

First, when charging connector 102 is connected to the charging inlet of vehicle 30 at time t0, processing unit 13 causes vehicle communication unit 12 to apply a predetermined voltage V1 (for example, V1=12 volts) to transmission line 1012 . The voltage applied to the transmission line 1012 serves as a transmission medium for the CPLT signal, and various information is exchanged between the charging ECU 302 of the vehicle 30 and the processing unit 13 according to the voltage level and duty ratio of the CPLT signal. .

When charging ECU 302 detects the CPLT signal of voltage V1, charging ECU 302 steps down the voltage level of the CPLT signal from V1 to V2 (for example, V2=9 volts) (time t1).

When the processing unit 13 detects that the CPLT signal has decreased from V1 to V2, it outputs a pulsed CPLT signal of a predetermined frequency (for example, 1 kHz) (from time t2). The signal level of the CPLT signal is ±V1, but the upper limit level is stepped down to V2.

Here, the duty ratio of the CPLT signal indicates the maximum value of the charging current Ic. For example, when the maximum value is 12 amperes, the duty ratio is set to 20%, and when the maximum value is 30 amperes, the duty ratio is set to 50%. The maximum value is a value determined by the maximum value determination unit 135 of the processing unit 13 based on the upper limit value. In short, the maximum value signal is a signal that represents the maximum value of the charging current by the duty ratio of a square wave having a predetermined frequency.

When the charging ECU 302 detects the duty ratio of the CPLT signal and recognizes the maximum value of the charging current Ic, the charging ECU 302 steps down the voltage level of the CPLT signal from V2 to V3 (for example, 6 V) (time t3).

When the processing unit 13 detects that the signal level of the CPLT signal has decreased from V2 to V3, the processing unit 13 turns on the relay 14 to start supplying charging power.

Based on the maximum value, charging ECU 302 sets a current value (≦maximum value) for charging storage battery 300 to a target level, and outputs a charging command to charging circuit 301 mounted on vehicle 30 . .

The charging circuit 301 that has received the charging command charges the storage battery 300 while adjusting the charging current Ic so as not to exceed the current value set by the charging ECU 302 (from time t3).

When the charging level of the storage battery 300 reaches the target level, the charging ECU 302 outputs a charge termination command to the charging circuit 301 to terminate charging of the storage battery 300, and returns the voltage level of the CPLT signal from V3 to V2 ( time t4).

The charging circuit 301 terminates charging of the storage battery 300 upon receiving the charging termination command.

When the processing unit 13 detects that the CPLT signal has changed from V3 to V2, the processing unit 13 turns off the relay 14 to stop supplying charging power.

Charging ECU 302 restores the voltage level of the CPLT signal to the initial V1 (time t5).

When the voltage level of the CPLT signal returns to V1, the processing unit 13 stops oscillating at the predetermined frequency, maintains the voltage level of the CPLT signal at V1, and returns to the standby state (time t6).

Thus, power supply device 1 basically adjusts (increases or decreases) charging current Ic supplied to vehicle 30 by instructing charging ECU 302 of vehicle 30 about the maximum value of charging current Ic. are doing.

Next, the operation of the power supply system 10 when the upper limit setting unit 22 of the device control device 2 changes the upper limit while the charging circuit 301 is charging the storage battery 300 (between times t3 and t4) will be described with reference to FIG. will be described with reference to the flow chart of In such a situation, for example, when a load 62 with a large power consumption such as a microwave oven or a dryer is turned on and the total current consumption of the load 62 increases, the power generated by the solar cell 71 is reduced. This may occur, for example, when the supply current from the photovoltaic power generation equipment 7 changes due to a change. That is, when the upper limit value setting unit 22 detects an increase in the total current consumption of the load 62, for example, the upper limit value can be decreased in accordance with the increase in the total current consumption.

First, the power supply device 1 transmits a maximum value signal to the vehicle 30 based on the upper limit value by the charging start signal and the upper limit value signal from the equipment control device 2, and the charging ECU 302 of the vehicle 30 outputs the maximum value signal. The storage battery 300 is charged based on the maximum value obtained (S101). In this state, when the upper limit signal is received from the device control device 2 (S102), the processing unit 13 of the power supply device 1 determines whether the current time is within the prohibition period (by transmitting the maximum value signal). (S103).

If the upper limit value signal was received outside the prohibition period (S103: No), the processing unit 13 returns an acceptance signal to the device control device 2 (S104). The processing unit 13 also compares the upper limit value indicated by the received upper limit value signal with the allowable value, and changes the maximum value of the charging current as necessary (S105). Then, by changing the duty ratio of the CPLT signal, the processing unit 13 transmits a maximum value signal indicating the changed maximum value to the vehicle 30 (S106). Moreover, the processing unit 13 transmits a confirmation signal indicating that the maximum value of the charging current has been changed based on the upper limit value signal to the device control device 2 (S107). Charging circuit 301 of vehicle 30 charges storage battery 300 based on the changed maximum value (S101).

On the other hand, if the upper limit signal is received within the prohibition period (S103: Yes), the processing unit 13 does not change the duty ratio of the CPLT signal and does not change the maximum value indicated by the maximum value signal. In addition, the processing unit 13 returns a non-acceptance signal including non-acceptance information to the device control device 2 (S108). Upon receiving the non-acceptance signal, the device control device 2 waits for the same length of time as the prohibition period (S109). After waiting, the device control device 2 retransmits the upper limit value signal (S110). When the power supply device 1 receives the upper limit value signal from the equipment control device 2, it returns to step 103 and performs the same processing thereafter.

As described above, the power supply device 1 of the present embodiment returns a non-acceptance signal to the device control device 2 when receiving the upper limit value signal during the prohibition period. Therefore, the device control device 2 can know that the power supply device 1 has not accepted the maximum value change command due to the transmission of the upper limit value signal. Therefore, the device control device 2 can perform processing for retransmitting the upper limit value signal, thereby improving the reliability of the power supply control.

Further, when the power supply device 1 of the present embodiment transmits the maximum value signal indicating the maximum value to the vehicle 30, another maximum value indicating the maximum value different from the maximum value is displayed until the timing of the prohibition period ends. Send no signal. That is, in the power supply system 10 of this embodiment, the maximum value of the charging current is not changed until the prohibition period elapses after the maximum value of the charging current is changed. Therefore, the possibility that the charging current will fluctuate (increase or decrease) more than necessary is reduced, the possibility that the charging control is adversely affected is reduced, and the reliability of the power supply control is improved.

(3) Modifications Embodiments of the present disclosure are not limited to the above embodiments. The above-described embodiment can be modified in various ways according to design and the like, as long as the object of the present disclosure can be achieved. Further, functions similar to those of the power supply device 1 according to the above embodiment may be embodied by a power supply method, a computer program, or a non-temporary recording medium recording the computer program.

A power supply method according to one aspect is a power supply method executed by a power supply device 1 that supplies charging power to a mobile object 3 . The moving body 3 has a power section, a storage battery 300 that supplies power to the power section, and a charging circuit 301 that charges the storage battery 300 with charging power that does not exceed the maximum value. The power supply method includes an upper limit value receiving process, a maximum value transmitting process, a prohibiting process, and a returning process. In the upper limit value receiving step, an upper limit value signal indicating the upper limit value of the maximum value is received from the external device (equipment control device 2). In the maximum value transmission step, a maximum value signal indicating the maximum value is transmitted to the moving body 3 based on the upper limit value. In the prohibition step, it is prohibited to transmit another maximum value signal indicating a maximum value different from the above maximum value to the moving body 3 until the elapsed time from the transmission of the maximum value signal reaches a predetermined prohibition period. do. In the replying step, if another upper limit value signal indicating an upper limit value different from the above upper limit value is received from the external device (equipment control device 2) within the prohibition period, a non-acceptance signal is returned to the external device.

A (computer) program according to one aspect is a program for causing one or more processors to execute the power supply method described above.

Modifications of the embodiment are listed below. Modifications described below can be applied in combination as appropriate. Moreover, below, the above-mentioned embodiment may be called a "basic example."

A power supply system 10 according to the present disclosure includes a computer system in, for example, the power supply device 1, the device control device 2, and the like. A computer system is mainly composed of a processor and a memory as hardware. The functions of the power supply system 10 in the present disclosure are realized by the processor executing a program recorded in the memory of the computer system. The program may be recorded in advance in the memory of the computer system, may be provided through an electric communication line, or may be recorded in a non-temporary recording medium such as a computer system-readable memory card, optical disk, or hard disk drive. may be provided. A processor in a computer system consists of one or more electronic circuits, including semiconductor integrated circuits (ICs) or large scale integrated circuits (LSIs). The integrated circuit such as IC or LSI referred to here is called differently depending on the degree of integration, and includes integrated circuits called system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration). Furthermore, an FPGA (Field-Programmable Gate Array), which is programmed after the LSI is manufactured, or a logic device capable of reconfiguring the bonding relationship inside the LSI or reconfiguring the circuit partitions inside the LSI, shall also be adopted as the processor. can be done. A plurality of electronic circuits may be integrated into one chip, or may be distributed over a plurality of chips. A plurality of chips may be integrated in one device, or may be distributed in a plurality of devices.

In addition, it is not an essential configuration of the power supply system 10 that a plurality of functions of the power supply device 1 and the device control device 2 are integrated in one housing. may be distributed over a plurality of housings. Furthermore, at least part of the functions of the power supply system 10, for example, part of the functions of the power supply device 1 or the device control device 2, may be realized by the cloud (cloud computing) or the like.

Conversely, in embodiments, at least some functions of the power supply system 10 that are distributed over multiple devices may be aggregated within one housing. For example, some functions of the power supply system 10 distributed between the power supply device 1 and the device control device 2 may be integrated in one housing.

(3.1) Modification 1
The non-acceptance signal returned by the reply unit 133 of the power supply device 1 may include waiting time information indicating the time until the prohibition period elapses as non-acceptance information. The operation of the power supply system 10 in this case will be described with reference to the flowchart of FIG.

In step S102, when the upper limit signal is received from the device control device 2, the power supply device 1 determines whether or not the prohibition period is valid (S103). is returned to the device control device 2 (S108). Here, the power supply apparatus 1 transmits a non-acceptance signal including waiting time information indicating the waiting time, which is the remaining time until the elapsed time measured by the timer 131 reaches the prohibited period as the waiting time. After receiving the non-acceptance signal and waiting for the waiting time (S109), the device control device 2 retransmits the upper limit value signal (S110).

In this modification, since the non-acceptance signal includes waiting time information, the device control device 2 does not need to store the length of the prohibition period. In addition, the equipment control device 2 can resend the upper limit value signal immediately after the prohibition period ends.

The waiting time indicated by the waiting time information is not limited to the remaining time until the elapsed time measured by the timer 131 reaches the prohibited period, and may be, for example, the length of the prohibited period.

(3.2) Modification 2
The power supply device 1 may be capable of receiving upper limit value signals from a plurality of external devices. The power supply system 10 in this case will be described with reference to FIG.

As shown in FIG. 6, the power supply system 10 includes a power supply device 1, a first device control device 2A, and a second device control device 2B.

As with the power supply device 1 of the basic example, the power supply device 1 includes a first communication unit 11, a vehicle communication unit 12, a processing unit 13, a relay 14, a protection circuit 15, and an allowable value setting unit 16. , provided. In the power supply device 1 of this modified example, the vehicle communication unit 12, the relay 14, the protection circuit 15, and the allowable value setting unit 16 are the same as those of the basic example. The first communication unit 11 can communicate with each of the first device control device 2A and the second device control device 2B. That is, the power supply device 1 of this modification includes a first receiving unit (first communication unit 11) that receives an upper limit value signal from a first external device (first device control device 2A), a second external device (second and a second receiving unit (first communication unit 11) that receives an upper limit value signal from the second device control device 2B). In this modification, the first receiving section and the second receiving section are shared.

As shown in FIG. 6, each of the first device control device 2A and the second device control device 2B is the same as the device control device 2 of the basic example.

In the power supply system 10 of this modified example, there are two devices that can transmit the upper limit value signal, the first device control device 2A and the second device control device 2B. Therefore, for example, a situation may occur in which the second device control device 2B transmits the upper limit signal before the prohibition period elapses after the first device control device 2A transmits the upper limit value signal. In other words, the external device (first device control device 2A, second device control device 2B) may reject the upper limit value signal transmitted by itself because of the upper limit value signal transmitted by a device other than itself. can occur. In this case, the external devices (first device control device 2A, second device control device 2B) do not know the upper limit value specified by the upper limit value signal transmitted by the device other than itself. Therefore, it is preferable that the response signal that the power supply device 1 replies to the upper limit signal includes current maximum value information indicating the current maximum value. As a result, the external device whose upper limit signal has been rejected can determine whether or not to retransmit the upper limit signal based on the current maximum value. For example, when an external device whose upper limit signal is rejected compares the upper limit value sent by itself with the current maximum value included in the rejection signal and determines that the maximum value does not need to be changed. , it is also possible not to retransmit the upper limit signal.

Instead of or in addition to the current maximum value information indicating the current maximum value, the rejection signal may include information indicating the upper limit used to determine the current maximum value.

(3.3) Modification 3
After transmitting the upper limit value signal, the device control device 2 (external device) waits for the prohibition period to elapse before transmitting the upper limit signal if the upper limit value is changed and another upper limit value signal needs to be transmitted. may be sent. The power supply system 10 in this case will be described with reference to FIG.

A power supply system 10 of this modification includes a power supply device 1 and a device control device 2 . The power supply device 1 supplies charging power to the vehicle 30 (moving body 3). The vehicle 30 has a power section, a storage battery 300 that supplies power to the power section, and a charging circuit 301 that charges the storage battery 300 with charging power that does not exceed the maximum value. The device control device 2 transmits an upper limit signal indicating the upper limit of the maximum value.

The power supply device 1 includes a first communication unit 11 (upper limit value receiving unit) and a vehicle communication unit 12 (maximum value transmitting unit). The first communication unit 11 receives the upper limit value signal from the device control device 2 . The vehicle communication unit 12 transmits a maximum value signal indicating the maximum value to the vehicle 30 based on the upper limit value.

The device control device 2 includes a second communication section 21 (upper limit value transmission section) and a prohibition section 231 . The second communication unit 21 transmits an upper limit signal. The prohibition unit 231 is provided in the control unit 23, for example, and the second communication unit 21 transmits a value different from the upper limit value until a predetermined waiting time elapses after the second communication unit 21 transmits the upper limit value signal. It is forbidden to send another upper limit signal indicating the upper limit.

For example, the prohibition unit 231 transmits the upper limit signal from the second communication unit 21 until the elapsed time from the transmission of the upper limit signal, which is measured by the timer 232 included in the control unit 23, reaches the standby time. prohibited. For example, the standby time is set to the same length as the inhibition period used for control in the power supply device 1 .

In this modification, the device control device 2 transmits the upper limit signal during a period other than the period during which the transmission of the upper limit signal may be rejected by the power supply device 1 . Therefore, the upper limit value signal transmitted by the device control device 2 is more likely to be accepted by the power supply device 1, improving the reliability of power supply control.

(3.4) Other Modifications In one modification, as shown in FIG. 7, the power supply device 1 may further include a prohibition period setting unit 18 that sets the length of the prohibition period. The prohibition period setting unit 18 may be realized by an appropriate operation unit (DIP switch, touch panel, etc.). It is preferable that the prohibition period that can be set by the prohibition period setting unit 18 has a lower limit.

In a modified example, the control unit 23 transmits the upper limit value from the second communication unit 21 only when the amount of change in the upper limit value changed by the upper limit value setting unit 22 is equal to or greater than a predetermined threshold during charging of the storage battery 300. A signal may be sent.

In a modified example, the prohibition unit 132 determines whether or not a predetermined prohibition period has elapsed after the transmission of the maximum value signal by a countdown method instead of a so-called countup method in which the elapsed time is measured by the clock unit 131. You may

In a modified example, the external device is not limited to the device control device 2, and may be the information terminal 4, for example.

In one modification, it is not essential that the power supply device 1 of the basic example memorize the prohibition period. The power supply device 1 may immediately resend the upper limit signal after receiving the non-acceptance signal.

(4) Summary As described above, the power supply device (1) of the first aspect supplies charging power to the moving object (3). A moving body (3) has a power section, a storage battery (300) that supplies power to the power section, and a charging circuit (301) that charges the storage battery (300) with charging power that does not exceed a maximum value. The power supply device (1) includes an upper limit value receiver (first communication unit 11), a maximum value transmitter (vehicle communication unit 12), a prohibition unit (132), and a reply unit (133). The upper limit value receiving unit receives an upper limit value signal indicating the upper limit value of the maximum value from the external device (equipment control device 2). The maximum value transmission unit transmits a maximum value signal indicating the maximum value to the moving body (3) based on the upper limit value. The prohibition unit (132) transmits another maximum value signal indicating a maximum value different from the maximum value to the moving body (3) until a predetermined prohibition period has elapsed after transmitting the maximum value signal. are prohibited from sending A reply unit (133) returns a non-acceptance signal to the external device when the upper limit value receiving unit receives another upper limit value signal indicating an upper limit value different from the upper limit value from the external device within the prohibition period.

According to this aspect, the external device can know that the power supply device (1) has rejected the maximum value change command due to the transmission of the upper limit value signal. Therefore, the external device (2) can perform processing such as retransmitting the upper limit value signal after receiving the non-acceptance signal, thereby improving the reliability of the power supply control.

In the power supply device (1) of the second aspect, in the first aspect, the non-acceptance signal includes non-acceptance information indicating that another maximum value signal based on the different upper limits was not transmitted.

According to this aspect, the reliability of power supply control is improved.

In the power supply device (1) of the third aspect, in the second aspect, the non-acceptance information includes waiting time information indicating the time until the prohibition period elapses.

According to this aspect, the reliability of power supply control is improved.

In the power supply device (1) of the fourth aspect, in the second or third aspect, the non-acceptance information includes current maximum value information indicating the current maximum value.

According to this aspect, the reliability of power supply control is improved.

In the power supply device (1) of the fifth aspect, in any one of the first to fourth aspects, when the reply unit (133) receives the upper limit value signal from the external device during a period other than the prohibition period, An acceptance signal is returned to the external device indicating transmission of the maximum value signal based on the upper limit value. A reply unit (133) returns a non-acceptance signal to the external device when the upper limit value signal is received from the external device during the prohibition period.

According to this aspect, the reliability of power supply control is improved.

In the power supply device (1) of the sixth aspect, in any one of the first to fifth aspects, the length of the inhibition period is 3 seconds or longer.

According to this aspect, the reliability of power supply control is improved.

In the power supply device (1) of the seventh aspect, in any one of the first to sixth aspects, the maximum value signal expresses the maximum value by a duty ratio of a square wave having a predetermined frequency. A prohibition unit (132) prohibits changing the duty ratio until the prohibition period elapses after transmission of the maximum value signal.

According to this aspect, the reliability of transmission of the maximum value signal is improved.

The power supply device (1) of the eighth aspect, in any one of the first to seventh aspects, further comprises an allowable value setting section (16) for setting an allowable maximum value. If the upper limit value indicated by the upper limit signal is greater than the allowable value set by the allowable value setting unit (16), the maximum value transmitting unit transmits the maximum value signal with the allowable value as the maximum value to the moving object (3). Send to

According to this aspect, the reliability of power supply control is improved.

The power supply device (1) of the ninth aspect, in any one of the first to eighth aspects, further comprises a prohibition period setting section (18) for setting the length of the prohibition period.

According to this aspect, the degree of freedom in setting the prohibition period is improved.

In the power supply device (1) of the tenth aspect, in any one of the first to ninth aspects, the external device includes a first external device and a second external device. The upper limit receiver includes a first receiver that receives the upper limit signal from the first external device, and a second receiver that receives the upper limit signal from the second external device.

According to this aspect, the reliability of power supply control is improved.

The power supply system (10) of the eleventh aspect comprises the power supply device (1) of any one of the first to tenth aspects and an external device.

According to this aspect, the reliability of power supply control is improved.

The power supply method of the twelfth aspect is performed by a power supply device (1) that supplies charging power to a mobile object (3). A moving body (3) has a power section, a storage battery (300) that supplies power to the power section, and a charging circuit (301) that charges the storage battery (300) with charging power that does not exceed a maximum value. The power supply method includes an upper limit value receiving process, a maximum value transmitting process, a prohibiting process, and a returning process. In the upper limit value receiving step, an upper limit value signal indicating the upper limit value of the maximum value is received from the external device (equipment control device 2). In the maximum value transmission step, a maximum value signal indicating the maximum value is transmitted to the moving object (3) based on the upper limit value. The prohibition step prohibits transmission of another maximum value signal indicating a maximum value different from the above maximum value to the moving body (3) until a predetermined prohibition period elapses after transmission of the maximum value signal. . In the replying step, if another upper limit value signal indicating an upper limit value different from the above upper limit value is received from the external device within the prohibition period, a non-acceptance signal is returned to the external device.

According to this aspect, the reliability of power supply control is improved.

A program according to a thirteenth aspect is a program for causing one or more processors to execute the power supply method according to the twelfth aspect.

According to this aspect, the reliability of power supply control is improved.

A power supply system (10) according to a fourteenth aspect includes a power supply device (1) and an external device (equipment control device 2). A power supply device (1) supplies charging power to a mobile object (3). A moving body (3) has a power section, a storage battery (300) that supplies power to the power section, and a charging circuit (301) that charges the storage battery (300) with charging power that does not exceed a maximum value. The external device transmits an upper limit signal indicating the upper limit of the maximum value. The power supply device (1) includes an upper limit value receiving section (first communication section 11) and a maximum value transmitting section (vehicle communication section 12). The upper limit receiver receives an upper limit signal from an external device. The maximum value transmission unit transmits a maximum value signal indicating the maximum value to the moving body (3) based on the upper limit value. The external device includes an upper limit transmission unit (second communication unit 21) and a prohibition unit (231). The upper limit value transmitter transmits an upper limit value signal. A prohibiting unit (231) prevents another upper limit value signal indicating an upper limit value different from the above upper limit value from the upper limit value transmitting unit until a predetermined waiting time elapses after the upper limit value transmitting unit transmits the upper limit signal. prohibited from sending.

According to this aspect, the external device transmits the upper limit signal during a period other than the period during which the transmission of the upper limit signal may not be accepted by the power supply (1). Therefore, the upper limit signal transmitted by the external device is more likely to be accepted by the power supply device (1), improving the reliability of power supply control.

The configurations according to the second to tenth aspects are not essential to the power supply device (1), and can be omitted as appropriate.

1 power supply device 11 first communication unit (upper limit value receiving unit)
12 vehicle communication unit (maximum value transmission unit)
132 prohibition unit 133 reply unit 16 allowable value setting unit 18 prohibition period setting unit 2 device control device (external device)
21 second communication unit 231 prohibition unit 3 moving body 300 storage battery 301 charging circuit

Claims (14)

A power supply device for supplying the charging power to a moving body having a power unit, a storage battery for supplying power to the power unit, and a charging circuit for charging the storage battery with charging power not exceeding a maximum value,
an upper limit value receiving unit that receives an upper limit value signal indicating an upper limit value of the maximum value from an external device;
a maximum value transmission unit configured to transmit a maximum value signal indicating the maximum value to the moving object based on the upper limit value;
The maximum value transmitting unit is prohibited from transmitting another maximum value signal indicating a maximum value different from the maximum value to the moving object until a predetermined prohibition period has elapsed after transmitting the maximum value signal. Prohibition Department;
a reply unit for replying a non-acceptance signal to the external device when the upper limit value receiving unit receives another upper limit value signal indicating an upper limit value different from the upper limit value from the external device within the prohibition period; ,
comprising
power supply. The non-acceptance signal includes non-acceptance information indicating that the another maximum value signal based on the different upper limit value was not transmitted,
The power supply device according to claim 1 . The non-acceptance information includes waiting time information indicating the time until the prohibition period elapses,
3. The power supply device according to claim 2. The non-acceptance information includes current maximum value information indicating the current maximum value,
The power supply device according to claim 2 or 3. The reply part
when receiving the upper limit signal from the external device during a period other than the prohibition period, returning an acceptance signal indicating transmission of the maximum value signal based on the upper limit to the external device;
If the upper limit signal is received from the external device during the prohibited period, the non-acceptance signal is returned to the external device.
The power supply device according to any one of claims 1 to 4. the length of the prohibited period is 3 seconds or more;
The power supply device according to any one of claims 1 to 5. wherein the maximum value signal represents the maximum value by a duty ratio of a square wave having a predetermined frequency;
The prohibition unit prohibits changing the duty ratio until the prohibition period elapses after the maximum value signal is transmitted.
The power supply device according to any one of claims 1-6. Further comprising an allowable value setting unit for setting an allowable value for the maximum value,
When the upper limit indicated by the upper limit signal is greater than the allowable value set by the allowable value setting unit, the maximum value transmitting unit transmits the maximum value signal with the allowable value as the maximum value. transmitting to the mobile;
The power supply device according to any one of claims 1-7. further comprising a prohibition period setting unit that sets the length of the prohibition period;
The power supply device according to any one of claims 1-8. The external device includes a first external device and a second external device,
The upper limit value receiving unit
a first receiver that receives the upper limit signal from the first external device;
a second receiver that receives the upper limit signal from the second external device;
comprising
The power supply device according to any one of claims 1-9. A power supply device according to any one of claims 1 to 10;
the external device;
comprising
power supply system. An electric power supply device that supplies the charging power to a moving body having a power section, a storage battery that supplies power to the power section, and a charging circuit that charges the storage battery with charging power that does not exceed a maximum value. A method of supply,
an upper limit value receiving step of receiving an upper limit value signal indicating an upper limit value of the maximum value from an external device;
a maximum value transmission step of transmitting a maximum value signal indicating the maximum value to the mobile object based on the upper limit value;
a prohibition step of prohibiting transmission of another maximum value signal indicating a maximum value different from the maximum value to the moving object until a predetermined prohibition period has elapsed since the transmission of the maximum value signal;
a returning step of returning a non-acceptance signal to the external device when another upper limit value signal indicating an upper limit value different from the upper limit value is received from the external device within the prohibition period;
comprising
Power delivery method. A program for causing one or more processors to execute the power supply method according to claim 12. a power supply device for supplying the charging power to a moving body having a power section, a storage battery for supplying power to the power section, and a charging circuit for charging the storage battery with charging power not exceeding a maximum value;
an external device that transmits an upper limit signal indicating the upper limit of the maximum value;
with
The power supply device
an upper limit value receiving unit that receives the upper limit value signal from the external device;
a maximum value transmission unit configured to transmit a maximum value signal indicating the maximum value to the moving object based on the upper limit value;
with
The external device is
an upper limit value transmission unit that transmits the upper limit value signal;
The upper limit value transmitting unit transmits another upper limit value signal indicating an upper limit value different from the upper limit value until a predetermined waiting time elapses after the upper limit value transmitting unit transmits the upper limit signal. a prohibition section that prohibits;
comprising
power supply system.

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