Building power supply system

Abstract

To provide a power supply system for a building that can avoid locking oneself outside at the time of a power failure while suppressing an increase in introduction costs.SOLUTION: A building 10 is provided with a locking and unlocking device 13 that electrically locks and unlocks an entrance door 12. An inlet 31 is provided on an outside wall 19 of the building 10. With a vehicle 25 being connected to the inlet 31 via a power supply cable 29, DC power of DC 12 V from an on-vehicle battery 26 can be supplied to the inlet 31 via the power supply cable 29. Also, in the building 10, a DC power supply path 35 in which the DC power of DC 12 V flows is provided as a power supply path connecting the inlet 31 with the locking and unlocking device 13. When DC power is supplied to the locking and unlocking device 13 via the DC power supply path 35 from the inlet 31, the supplied DC power causes the locking and unlocking device 13 to operate.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a building power supply system. [Background technology]

[0002] In recent years, power supply systems that use on-board batteries installed in electric vehicles or hybrid vehicles to supply power from the vehicle to a building have been put into practical use (see, for example, Patent Document 1). With such a power supply system, when a power outage occurs in a building due to a disaster or the like, it becomes possible to operate electrical devices in the building by supplying power from the vehicle to the building.

[0003] When the above-mentioned power supply system supplies power from the vehicle to the building, the vehicle and the building are connected via a power supply cable, and the power of the on-board battery is supplied to the building through the power supply cable in this connected state. In this case, for example, the DC power of the on-board battery is converted to AC 100V on the vehicle side, and the converted AC 100V AC power is supplied from the vehicle to the building side.

[0004] The power supply capacity of an on-board battery is smaller than that of a commercial power source. Therefore, when supplying power from an on-board battery to a building, it is considered that the power supply destination will be limited to a specific area in the building. For example, it is considered that the power supply destination will be the living room, dining room, and other living areas, and power supply will be limited to electrical appliances installed in the living room area. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2013-9521 A Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, some buildings are equipped with an electronic lock that electrically locks and unlocks the front door as a locking device. In such buildings, when a power outage occurs, the locking device will not be supplied with power and will not work. Therefore, even if a resident returns home from outside during a power outage and tries to unlock the locking device, he or she will not be able to do so, and there is a risk that the resident will be locked out of the building.

[0007] Therefore, it is conceivable to include the locking device in the power supply destinations of the above-mentioned power supply system. However, since the above-mentioned power supply system supplies power to the occupant areas in the building, if power is supplied to the locking device in addition to the occupant areas, the power supply to the occupant areas will be restricted, which may cause inconveniences such as limiting the amount of time people can spend comfortably during a power outage.

[0008] In addition, since the above-mentioned power supply system supplies relatively high voltage AC 100V power from a vehicle to a building via a power supply cable, it is considered necessary to separately install a detection device that detects power supply abnormalities such as a ground fault in the power supply cable in order to ensure safety during power supply. However, such detection devices are generally expensive, and there is a risk that introducing the power supply system will result in increased costs.

[0009] The present invention has been made in consideration of the above-mentioned circumstances, and its main object is to provide a power supply system for a building that can avoid locking people out of the building during a power outage while suppressing increases in implementation costs. [Means for solving the problem]

[0010] In order to solve the above problems, a building power supply system of a first invention is applied to a building equipped with a locking device that electrically locks and unlocks a door provided at an entrance for entering and exiting indoors and outdoors, the building is provided with a connection part that is connected to a vehicle equipped with an on-board battery via a power supply cable, and a power supply path that connects the connection part and the locking device, the voltage of the on-board battery is set to a predetermined voltage lower than 100V, and when the vehicle is connected to the connection part via the power supply cable, DC power of the predetermined voltage can be supplied from the on-board battery to the connection part through the power supply cable, the power supply path is a DC power supply path that can supply the DC power supplied to the connection part to the locking device, and the locking device operates with the DC power supplied from the DC power supply path.

[0011] Generally, the voltage (battery voltage) of an on-board battery mounted on a vehicle is set to a predetermined voltage lower than 100V, such as 12V or 24V. Therefore, in the first invention, with the vehicle connected to the connection part on the building side via a power supply cable, DC power of the above-mentioned predetermined voltage is supplied from the on-board battery to the connection part via the power supply cable. In this case, unlike the case of supplying 100V AC power from the vehicle to the building side, there is no need to provide an expensive detection device for detecting power supply abnormalities. Therefore, it is possible to suppress an increase in costs when introducing a power supply system.

[0012] In addition, the DC power supplied from the vehicle battery to the connection part is supplied to the locking device through the DC power supply path. As a result, if a power outage occurs in the building, the locking device can be operated by the supplied DC power. Therefore, when the user returns home, he or she can unlock the locking device and enter the building. This makes it possible to prevent the user from being locked out of the building during a power outage.

[0013] The building power supply system of the second invention is the first invention, characterized in that a lighting device is provided outdoors around the entrance / exit, the DC power supply path is connected to the lighting device in addition to the locking device, and DC power from the vehicle battery supplied to the connection part can be supplied to the lighting device, and the lighting device is operated by DC power supplied from the DC power supply path.

[0014] According to the second aspect of the present invention, the DC power is also supplied from the vehicle battery to the lighting device installed outdoors near the entrance, and the lighting device is operated by the supplied DC power. In this way, in the event of a power outage at night, the lighting device can illuminate the area around the entrance, making it easy to unlock the locking device.

[0015] The third invention is a building power supply system according to the first or second invention, characterized in that the locking device can be locked and unlocked using a portable device carried by a user, a charging unit to which the portable device can be connected and charged is provided outdoors around the entrance / exit, the DC power supply path is connected to the charging unit in addition to the locking device, and DC power from the vehicle battery supplied to the connection unit can be supplied to the charging unit, and the charging unit charges the portable device with the DC power supplied from the DC power supply path.

[0016] Some locking devices can be locked and unlocked using a portable device such as a smartphone carried by a user. However, if the portable device runs out of battery when an attempt is made to unlock the locking device during a power outage, the locking device cannot be unlocked even if power is being supplied to the locking device, and the user ends up being locked out of the house.

[0017] Therefore, in the third invention, a charging section to which a portable device can be connected and charged is provided near an outdoor entrance, and DC power can be supplied to the charging section from the vehicle battery. This allows the portable device to be charged by the DC power during a power outage, making it possible to avoid being locked out of the outdoors due to the portable device running out of charge.

[0018] The building power supply system of a fourth invention is characterized in that, in any of the first to third inventions, the system comprises a distribution board to which AC 100V commercial power is sent from a commercial power source, a connection path connecting the distribution board and the DC power supply path, a power conversion unit that converts the commercial power flowing through the connection path from the distribution board to the DC power supply path into DC power, and a switching unit provided at the connection portion between the DC power supply path and the connection path, for switching whether the commercial power converted into DC power by the power conversion unit or the DC power supplied from the vehicle battery is to be supplied to the locking device.

[0019] According to a fourth aspect of the present invention, a distribution board and a DC power supply path are connected via a connection path. Commercial power flowing through the connection path from the distribution board to the DC power supply path is converted into DC power by a power conversion unit. A switching unit is provided at a connection portion between the connection path and the DC power supply path, and the switching unit switches between the commercial power converted into DC power by the power conversion unit and the DC power from the vehicle battery to be supplied to the locking device.

[0020] In such a configuration, when commercial power is supplied to the locking device by switching by the switching unit, the commercial power is converted from AC power (100V AC) to DC power, and is supplied as DC power to the locking device through a DC power supply path, which is a power supply path from the vehicle. For example, a configuration is also possible in which AC100V commercial power is supplied from a distribution board to the locking device through a commercial power supply path (power supply path for AC100V), and a power conversion unit that converts the commercial power to DC power is provided in the locking device. However, in such a configuration, a commercial power supply path is required in addition to the DC power supply path as a power supply path leading to the locking device, making the configuration complicated. In this regard, in the fourth invention, the power supply path leading to the locking device can be limited to only the DC power supply path, making it possible to simplify the configuration.

[0021] A fifth aspect of the present invention is a building power supply system according to any one of the first to fourth aspects of the present invention, characterized in that the locking device is operated by DC power of the predetermined voltage.

[0022] According to the fifth aspect of the present invention, the locking device operates at a predetermined voltage that is the same as the voltage of the vehicle battery. In this case, there is no need to provide a voltage conversion device such as a DC-DC converter on the direct current power supply path, which reduces the introduction cost.

[0023] The building power supply system of the sixth invention is characterized in that, in any of the first to fifth inventions, the vehicle is provided with a cigarette lighter socket connected to the on-board battery, and the power supply cable connects the cigarette lighter socket and the connection part.

[0024] Generally, a vehicle is provided with a cigarette lighter socket, and DC power from the vehicle battery can be taken out from the cigarette lighter socket. In this regard, in the sixth invention, the cigarette lighter socket of the vehicle is connected to a connection part on the building side via a power supply cable, and DC power from the vehicle battery is supplied from the cigarette lighter socket to the connection part via the power supply cable. In this case, it is possible to improve versatility in implementing the first invention. [Brief description of the drawings]

[0025] [Figure 1] FIG. 1 is a diagram showing an overall configuration of a power supply system. [Diagram 2] FIG. 13 is a diagram showing an overall configuration of a power supply system according to another embodiment. [Diagram 3] FIG. 13 is a diagram showing an overall configuration of a power supply system according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to the accompanying drawings, in which: Figure 1 is a diagram showing the overall configuration of a power supply system.

[0027] As shown in FIG. 1, the building 10 is a detached house. The building 10 is provided with a front door 11 as an entrance, and people can enter and exit the building 10 through the front door 11. The front door 11 is provided with a front door 12 (corresponding to a door). The front door 12 is, for example, a swinging door. The reference symbol 12a in the figure denotes a door handle of the front door 12.

[0028] The front door 12 is provided with a locking device 13. The locking device 13 is an electronic lock that electrically locks and unlocks the front door 12. The locking device 13 is configured with a deadbolt and a drive unit that drives the deadbolt, and locks and unlocks the door when the deadbolt is driven by the drive unit. The locking device 13 is operated by DC 12V direct current power.

[0029] The locking device 13 is locked and unlocked by an electronic key 16 carried by a resident of the building 10. The electronic key 16 locks and unlocks the locking device 13 using wireless communication. The locking device 13 can also be locked and unlocked by a smartphone 17, which is a portable device carried by the resident (corresponding to a user). The smartphone 17 has a function of locking and unlocking the locking device 13 using wireless communication. The locking device 13 has a thumb turn (not shown) that can be used to lock and unlock the locking device 13 from inside the building.

[0030] Outdoors, lighting devices 14 are provided around the entrance 11. The lighting devices 14 are configured with LEDs and are provided on the exterior wall 19 around the entrance 11. As a result, the area around the entrance 11 is illuminated by light from the lighting devices 14 at night. The lighting devices 14 are also powered by DC 12V direct current power.

[0031] A USB outlet 15 is provided outdoors near the entrance 11. The USB outlet 15 is provided on an exterior wall 19 near the entrance 11. A resident's smartphone 17 or the like can be connected to the USB outlet 15 via a USB cable 18. The USB outlet 15 outputs DC 12V direct current power. Therefore, it is possible to charge the smartphone 17 using the output power. The USB outlet 15 corresponds to a charging unit.

[0032] Next, the configuration of the power supply system provided in the building 10 will be described.

[0033] A distribution board 21 is provided in the building 10. AC 100V commercial power sent from a commercial power source (system power source) is supplied to the distribution board 21 via a lead-in line 22. A plurality of branch circuits 23 are connected to the distribution board 21. These branch circuits 23 include a circuit for the living room, a circuit for the kitchen, a circuit for the entrance, etc. Electrical equipment E such as lighting, home appliances, and outlets are connected to each branch circuit 23. The commercial power supplied to the distribution board 21 is supplied to the electrical equipment E through these branch circuits 23.

[0034] This power supply system has an external power supply path for supplying power from the vehicle 25 to the locking device 13, the lighting device 14, and the USB outlet 15 (hereinafter also referred to as the electrical devices 13 to 15) provided around the entrance 11 in the event of a power outage in the building 10. The external power supply path will be described below.

[0035] The vehicle 25 is a plug-in hybrid vehicle (PHV) equipped with an on-board battery 26. The voltage (nominal voltage) of the on-board battery 26 is set to DC 12 V (corresponding to a predetermined voltage). Therefore, DC 12 V direct current power is stored in the on-board battery 26. The on-board battery 26 is electrically connected to devices such as lamps, an air conditioner, and an audio device provided in the vehicle 25. These devices are operated by power supplied from the on-board battery 26. The vehicle 25 is also provided with a cigarette lighter socket 27 inside the vehicle. The cigarette lighter socket 27 is electrically connected to the on-board battery 26, and is capable of extracting power from the on-board battery 26.

[0036] The vehicle 25 can be connected to the building 10 via a power supply cable 29. The power supply cable 29 has a pair of connectors 29a, 29b at both ends. Of the connectors 29a, 29b, one connector 29a can be connected to the cigarette lighter socket 27 of the vehicle 25, and the other connector 29b can be connected to an inlet 31 provided on the outer wall 19 of the building 10. As a result, the connector 29a of the power supply cable 29 is connected to the cigarette lighter socket 27 of the vehicle 25 and the connector 29b is connected to the inlet 31 of the building 10, so that the vehicle-mounted battery 26 of the vehicle 25 and the inlet 31 on the building 10 side are electrically connected via the power supply cable 29. In addition, a parking space 33 for the vehicle 25 is provided outdoors adjacent to the building 10, and the inlet 31 is attached to the outer wall 19 facing the parking space 33. The inlet 31 corresponds to a connection part.

[0037] The building 10 is provided with a power supply path that connects the inlet 31 to the electrical devices 13-15 around the entrance 11. This power supply path is a DC power supply path 35 through which DC 12V DC power flows. A changeover switch 36, which will be described later, is provided midway along the DC power supply path 35. The DC power supply path 35 has a power supply path section 37 that connects the inlet 31 to the changeover switch 36, and a power supply path section 38 that connects the changeover switch 36 to the electrical devices 13-15. The power supply path section 38 is branched midway, and the branched branch paths 38a-38c are connected to the electrical devices 13-15, respectively.

[0038] In the above configuration, with vehicle 25 connected to inlet 31 via power supply cable 29, DC 12V DC power is supplied from in-vehicle battery 26 to inlet 31 via power supply cable 29. The supplied DC power is then supplied from inlet 31 to each of electrical devices 13 to 15 via DC power supply path 35. As a result, locking device 13 and lighting device 14 are operated by the supplied DC power, and USB outlet 15 becomes usable (chargeable). Therefore, even during a power outage, it is possible to lock and unlock locking device 13, and also to charge smartphone 17 using USB outlet 15.

[0039] Next, a configuration for supplying commercial power from distribution board 21 to each of electrical devices 13 to 15 will be described.

[0040] Of the branch circuits 23 connected to the distribution board 21, the electric devices 13 to 15 are connected to the entrance circuit 23A, which is a circuit for the entrance. Commercial power is supplied from the distribution board 21 to the electric devices 13 to 15 through the entrance circuit 23A.

[0041] The entrance circuit 23A includes a connection path 39 that connects the distribution board 21 and the changeover switch 36, and the above-mentioned power supply path 38 that connects the changeover switch 36 and each of the electrical devices 13 to 15. Therefore, the entrance circuit 23A includes a part of the DC power supply path 35.

[0042] A power conversion unit 41 is provided in the connection path 39. The power conversion unit 41 converts commercial power flowing through the connection path 39 from the distribution board 21 toward the changeover switch 36 (and thus the DC power supply path 35) from AC 100V AC power to DC 12V DC power. The DC power converted by the power conversion unit 41 is supplied to the changeover switch 36.

[0043] As described above, the changeover switch 36 is provided in the DC power supply path 35. In this case, the changeover switch 36 is provided at a connection portion where the DC power supply path 35 and the connection path 39 are connected. The changeover switch 36 is switchable between a first position where the connection path 39 and the power supply path section 38 are connected, and a second position where the power supply path sections 37, 38 are connected. The changeover switch 36 corresponds to a switching section.

[0044] When the changeover switch 36 is in the first position, commercial power is supplied from the distribution board 21 to each of the electric devices 13 to 15 via the connection path 39 and the power supply path section 38. In this case, the commercial power is converted into DC 12V direct current power in the power conversion section 41, and the converted direct current power is supplied to each of the electric devices 13 to 15. The changeover switch 36 is normally set to the first position. In this case, the first position can also be referred to as a commercial power supply position.

[0045] On the other hand, when the changeover switch 36 is switched from the first position to the second position with the vehicle 25 connected to the inlet 31 via the power supply cable 29, DC 12V DC power is supplied from the vehicle-mounted battery 26 to the inlet 31 via the power supply cable 29. The supplied DC power is then supplied from the inlet 31 to each of the electrical devices 13 to 15 via the power supply path sections 37 and 38. In this case, the second position can also be referred to as a vehicle power supply position.

[0046] The power supply path section 37 is provided with a connection detection sensor 43 that detects that the vehicle 25 (more specifically, the cigarette lighter socket 27) and the inlet 31 are connected via the power supply cable 29. The connection detection sensor 43 is connected to a drive circuit 45 that drives the changeover switch 36. When the connection detection sensor 43 detects the connection between the vehicle 25 and the inlet 31, the drive circuit 45 switches the changeover switch 36 from a first position (commercial power supply position) to a second position (vehicle power supply position) based on the detection. As a result, when the vehicle 25 and the inlet 31 are connected via the power supply cable 29, power supply from the in-vehicle battery 26 to each of the electric devices 13 to 15 is automatically started.

[0047] The drive circuit 45 drives the changeover switch 36 using power from the built-in battery. The changeover switch 36 can also be manually operated, and after the power outage is restored, the changeover switch 36 can be manually returned from the second position (vehicle power supply position) to the first position (commercial power supply position).

[0048] According to the configuration of this embodiment described in detail above, the following excellent effects can be obtained.

[0049] The voltage (battery voltage) of the on-board battery 26 mounted on the vehicle 25 is set to 12V, which is sufficiently lower than 100V. Therefore, in the above embodiment, in a state where the vehicle 25 is connected to the inlet 31 on the building 10 side via the power supply cable 29, DC 12V DC power is supplied from the on-board battery 26 to the inlet 31 through the power supply cable 29. In other words, the DC power of the on-board battery 26 is supplied to the inlet 31 as it is without being converted to AC 100V or the like on the vehicle 25 side. In this case, unlike the case where AC 100V power is supplied from the vehicle 25 to the building 10 side, there is no need to provide an expensive detection device for detecting a power supply abnormality. Therefore, it is possible to suppress an increase in costs in introducing a power supply system.

[0050] Also, a DC power supply path 35 is provided to supply DC power supplied from the vehicle battery 26 to the inlet 31 to the locking device 13. As a result, in the event of a power outage in the building 10, the locking device 13 can be operated by the DC power supplied to the locking device 13 through the DC power supply path 35. This allows a resident who has returned home to unlock the locking device 13 and enter the building 10, thereby preventing the resident from being locked out outdoors during a power outage.

[0051] In addition to the locking device 13, the DC power supply path 35 is connected to the lighting device 14 installed outdoors near the entrance 11, so that DC power from the vehicle battery 26 can be supplied from the inlet 31 to the lighting device 14 through the DC power supply path 35. In this case, the lighting device 14 can be operated by the supplied DC power. As a result, in the event of a power outage at night, the light emitted from the lighting device 14 can illuminate the area around the entrance 11, making it possible to conveniently unlock the locking device 13.

[0052] In addition to the locking device 13 and the lighting device 14, the DC power supply path 35 is connected to the USB outlet 15 provided outdoors near the entrance 11. DC power from the vehicle battery 26 can also be supplied from the inlet 31 to the USB outlet 15 through the DC power supply path 35. In this case, by connecting the smartphone 17 to the USB outlet 15 during a power outage, the smartphone 17 can be charged by the DC power supplied to the USB outlet 15. This makes it possible to avoid a situation in which the smartphone 17 runs out of charge during a power outage and the smartphone 17 cannot be used to unlock the locking device 13, which means that it is possible to avoid being locked out of the outdoors.

[0053] The distribution board 21 and the DC power supply path 35 are connected via a connection path 39, and commercial power flowing from the distribution board 21 to the DC power supply path 35 through the connection path 39 is converted into DC power by a power conversion unit 41. A changeover switch 36 is provided at the connection portion between the connection path 39 and the DC power supply path 35, and the changeover switch 36 switches whether the commercial power converted into DC power by the power conversion unit 41 or the DC power from the vehicle battery 26 is to be supplied to the locking device 13.

[0054] In this configuration, when commercial power is supplied to the locking device 13 by switching the changeover switch 36 to the first position (commercial power supply position), the commercial power is converted into DC power by the power conversion unit 41 and is supplied as DC power to the locking device 13 through the DC power supply path 35 (more specifically, the power supply path unit 38), which is the power supply path from the vehicle 25. In this case, there is no need to provide a commercial power supply path that supplies AC 100V commercial power to the locking device 13 as the power supply path leading to the locking device 13, and only the DC power supply path 35 needs to be provided. This makes it possible to simplify the configuration.

[0055] The locking device 13 used is one that operates on 12 V, which is the same voltage as the vehicle battery 26. In this case, there is no need to provide a voltage conversion device such as a DC-DC converter on the direct current power supply path 35, and therefore the introduction cost can be reduced accordingly.

[0056] A cigarette lighter socket 27 provided in the vehicle 25 and an inlet 31 on the building 10 side are connected via a power supply cable 29. The cigarette lighter socket 27 is usually provided in the vehicle 25 and is capable of extracting power from the on-board battery 26. Therefore, this configuration can increase versatility in implementing the above-mentioned power supply system.

[0057] The present invention is not limited to the above embodiment, and may be implemented, for example, as follows.

[0058] (1) For example, as shown in FIG. 2, a storage battery 51 (battery) may be provided to store commercial power converted into DC power of DC 12V by a power conversion unit 41. In the example of FIG. 2, the storage battery 51 is provided in the power supply path unit 38 of the DC power supply path 35. In this configuration, the storage battery 51 is charged using commercial power during normal times (when commercial power is being supplied), and during a power outage, the DC power charged in the storage battery 51 can be supplied to each of the electric devices 13 to 15. Therefore, during a power outage, power can be supplied to the electric devices 13 to 15 from both the storage battery 51 and the in-vehicle battery 26, and power can be supplied for a long period of time during a power outage. For example, when a power outage lasts for a long period of time, it is necessary to unlock the locking device 13 every time the user goes out and returns from the place where the user went out. Even in such a case, the locking device 13 can be unlocked each time, and locking out of the outdoors can be avoided.

[0059] (2) For example, as shown in FIG. 3, a solar panel 55 may be installed in the building 10, and power generated by the solar panel 55 may be supplied to each of the electric devices 13 to 15 during a power outage. In the example of FIG. 3, the solar panel 55 is connected to a changeover switch 56 via a power conditioner (not shown). The changeover switch 56 is a three-position changeover switch that can be switched between a first position, a second position, and a third position. When the changeover switch 56 is in the first position, commercial power from the distribution board 21 is converted into DC power by the power conversion unit 41, and the converted DC power is supplied to each of the electric devices 13 to 15. When the changeover switch 56 is in the second position, the power (DC power) generated by the solar panel 55 is supplied to each of the electric devices 13 to 15. When the changeover switch 56 is in the third position, DC power from the vehicle-mounted battery 26 is supplied to each of the electric devices 13 to 15. In this configuration, during a power outage, power can be supplied from the solar panel 55 in addition to the storage battery 51 and the vehicle-mounted battery 26. Therefore, power can be supplied to the electrical devices 13 to 15 for a longer period of time, and locking out the electrical devices outdoors can be avoided for a longer period of time.

[0060] (3) In the above embodiment, the lighting device 14 is provided outdoors around the entrance 11, but in addition to this, it may be provided indoors (for example, at the entrance). In this case, too, by connecting the DC power supply path 35 to the indoor lighting device, DC power from the vehicle battery 26 can be supplied to the indoor lighting device. This makes it possible to illuminate the entrance during a power outage at night, making it easier for a person to act after unlocking the locking device 13 and entering the building 10.

[0061] (4) In the above embodiment, the USB outlet 15 is provided outdoors near the entrance 11, but it may also be provided indoors (for example, at the entrance). In this case, too, by connecting the DC power supply path 35 to an indoor USB outlet, it becomes possible to charge the smartphone 17 using DC power from the in-vehicle battery 26. This makes it possible to charge the smartphone 17 indoors after unlocking the locking device 13 and entering the building 10.

[0062] (5) In the above embodiment, the electric devices 13 to 15 are used for 12V, which is the same voltage as the in-vehicle battery 26. However, this may be changed to use electric devices other than 12V. For example, the locking device 13 may be used for DC 24V. In this case, a DC-DC converter may be provided on the branch path 38a leading to the locking device 13 of the DC power supply path 35, and the DC power flowing through the branch path 38a may be converted from DC 12V to DC 24V by the converter.

[0063] (6) In general, when the vehicle is a large vehicle, the voltage of the vehicle-mounted battery is set to 24 V. Therefore, power may be supplied to the locking device 13 from the vehicle-mounted battery. In this case, a power supply path for DC 24 V may be configured as the direct current power supply path 35, and the locking device 13 may be one that operates on DC 24 V.

[0064] (7) There is a power supply cable whose one end is irremovably connected (attached) to a cable connection part (corresponding to a connection part) provided on an exterior wall. By connecting the other end of such a power supply cable to a vehicle 25, the vehicle 25 and the building 10 side (cable connection part) are connected via the power supply cable. The power supply system of the present invention can also be applied when power is supplied from the vehicle 25 to the electrical devices 13 to 15 in the building 10 using such a power supply cable.

[0065] (8) In the above embodiment, the power supply cable 29 is connected to the cigarette lighter socket 27 (vehicle-side connection portion) of the vehicle 25, but the vehicle-side connection portion of the power supply cable 29 does not necessarily have to be the cigarette lighter socket 27. For example, the vehicle-side connection portion may be provided on the side or rear of the vehicle 25.

[0066] (9) In the above embodiment, a plug-in hybrid vehicle (PHV) is used as the vehicle, but a vehicle (electric vehicle) other than a PHV, such as an electric vehicle (EV) or a fuel cell hybrid vehicle (FCHV), may be used. In addition, the vehicle does not necessarily have to be an electric vehicle, and a gasoline vehicle or the like may be used. In short, the power supply system of the present invention can be applied to any vehicle equipped with an on-board battery.

[0067] (10) In the above embodiment, the power supply system of the present invention is applied to the locking device 13 of the front door 12. However, the power supply system of the present invention may also be applied to a locking device that locks and unlocks other entrance doors, such as a back door. [Explanation of symbols]

[0068] 10...building, 11...front door as entrance / exit, 12...front door as door, 13...locking device, 14...lighting device, 15...USB port as charging unit, 17...smartphone as portable device, 21...distribution board, 25...vehicle, 26...on-board battery, 29...power supply cable, 31...inlet as connection unit, 35...DC power supply path, 36...switch as switching unit, 39...connection path, 41...power conversion unit.

Claims

1. This is applied to buildings equipped with a locking device that electrically locks and unlocks the doors installed at the entrances for entering and exiting the interior and exterior of the building. The building is provided with a connection part connected to a vehicle having an on-board battery via a power supply cable, and a power supply path connecting the connection part and the locking device, The voltage of the vehicle battery is set to a predetermined voltage lower than 100 V, When the vehicle is connected to the connection section via the power supply cable, the DC power of the predetermined voltage can be supplied from the vehicle-mounted battery to the connection section via the power supply cable, the power supply path is a DC power supply path capable of supplying DC power supplied to the connection portion to the locking device, The locking device is operated by DC power supplied from the DC power supply path, and can be locked and unlocked using a portable device carried by a user, A charging unit to which the portable device can be connected and charged is provided around the entrance outdoors, The DC power supply path is connected to the charging unit in addition to the locking device, and DC power from the vehicle battery supplied to the connection unit can be supplied to the charging unit as well. A power supply system for a building, wherein the charging unit charges the portable device with DC power supplied from the DC power supply path.

2. A lighting device is provided outdoors around the entrance, the DC power supply path is connected to the lighting device in addition to the locking device, and the DC power from the vehicle battery supplied to the connection portion can be supplied to the lighting device as well; The power supply system for a building according to claim 1 , wherein the lighting device is operated by DC power supplied from the DC power supply path.

3. A distribution board to which AC 100V commercial power is sent from a commercial power source; A connection path that connects the distribution board and the DC power supply path; a power conversion unit that converts commercial power flowing through the connection path from the distribution board to the DC power supply path into DC power; a switching unit that is provided at a connection portion between the DC power supply path and the connection path and that switches between commercial power converted into DC power by the power conversion unit and DC power supplied from the vehicle battery, and supplies the commercial power to the locking device; The building power supply system according to claim 1 or 2, comprising:

4. The power supply system for a building according to claim 1 , wherein the locking device is operated by DC power of the predetermined voltage.

5. The vehicle is provided with a cigarette lighter socket connected to the vehicle battery, The power supply system for a building according to claim 1 , wherein the power supply cable connects the cigarette lighter socket and the connection portion.

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