JP2010192714A - Photovoltaic power system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology that allows a photovoltaic power system to be installed in a parking area while reducing equipment costs. <P>SOLUTION: The photovoltaic power system, which is installed in a parking area (40) having one or more parking spaces (41), includes: flexible solar cell sheets (11), each of which almost entirely covers one parking space (41); sheet fixtures (12) that fix the rear edge of the solar cell sheet to the ground on the rear side, opposite to the entrance side for an automobile (50), in each parking space (41); an energy storage device (16) that stores electric power generated by the solar cell sheets (11); and a power feeding device (17) that feeds electric power from the energy storage device (16) to the automobile (50) in each parking space (41). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a solar power generation system in a parking lot. In particular, in a parking lot equipped with a power feeding device so as to be able to charge an electric vehicle that uses electric power as a driving source of the vehicle while parked, a parking lot equipped with a photovoltaic power generation system as a power supply source for feeding the electric vehicle Relates to a photovoltaic power generation system in Japan.

(Dissemination of electric vehicles)
In recent years, electric vehicles have been popularized against the background of soaring gasoline prices and improved performance of secondary batteries. Needless to say, an electric vehicle runs on electric energy charged in a built-in secondary battery. Therefore, since the secondary battery is completely discharged and cannot run, it is necessary to charge before discharging. Charging is generally performed at home or the like, but it is considered that charging stations for electric vehicles will become widespread in the same way as gas stations.

(Dissemination of solar power generation)
On the other hand, with the demand for reducing carbon dioxide emissions, the use of natural energy has become an urgent issue, and solar power generation is becoming widespread. In order to secure the amount of power generated by solar power generation, it is necessary to secure an area for installing the solar cell panel. Currently, for example, the roofs of buildings such as public facilities and ordinary houses are widely used. Patent Document 1 discloses a technique for using a highway roof as a place for installing a solar cell panel.

  This patent document 1 also discloses a proposal for transmitting electric power generated by a solar cell panel installed on a roof of an expressway to a parking area such as a service area or a parking area and charging the electric vehicle. .

JP 2003-86821 A

A parking lot is also promising as a place to secure an area for installing solar panels. That is, if a roof is installed in a parking lot, and a solar cell panel is installed on the roof to generate power, it is expected that a predetermined power generation amount can be secured.
However, installation of a roof in a parking lot requires equipment costs and architectural limitations. In the first place, parking lot owners often operate parking lots with the motivation to use land effectively with little capital investment. Therefore, if it is only to install a solar cell panel to provide a roof in a parking lot, it is difficult to realize.

  The problem to be solved by the present invention is to provide a technique capable of installing a solar cell panel in an area called a parking lot while suppressing the equipment burden.

(First invention)
A first invention provided in the present application relates to a solar power generation system (10) in a parking lot.
That is, in a parking lot (40) having one or a plurality of parking spaces (41), a flexible solar cell sheet (11) having a size substantially covering the parking space (41), and an automobile in the parking space (41) A sheet fixture (12) for fixing one side edge of the rear side of the solar cell sheet to the ground on the rear side opposite to the entrance / exit side of (50), and storing electric power generated by the solar cell sheet (11) And a power supply device (17) for supplying electric power from the power storage device (16) to the automobile (50) stored in the parking space (41).

The “flexible solar cell sheet” is a sheet-like solar cell formed of fibers having a dye-sensitized power generation element, for example.
When there are a plurality of parking spaces (41), the solar cell sheet (11) and the seat fixture (12) are not necessary for all the parking spaces (41).
On the other hand, even if the solar cell sheet (11) and the seat fixture (12) are provided for the plurality of parking spaces (41), the power storage device is provided for each solar cell sheet (11) and the seat fixture (12). (16) need not be provided.

(Function)
Since a flexible solar cell sheet (11) is laid in each parking space (41) of the parking lot (40) so as to almost cover the ground area, power is generated by the solar cell sheet (11). The electric power generated by each solar cell sheet (11) is collected and stored in the power storage device (16).
When parking the car (50) in the parking space (41), hold the front side of the solar cell sheet (11) and move it to the rear side of the parking space (41) to open the parking space (41) and park it. After the automobile (50) is parked in the space (41), the solar cell sheet (11) is placed on the automobile (50). Therefore, even when the car (50) is parked in the parking space (41), it is possible to generate power with the solar cell sheet (11) placed on the car (50), and the generated power is stored. It is stored in the device (16). Moreover, the electric power of the power storage device (16) can be charged to the parked automobile (50) by the power feeding device (17) using the parking time in the parking space (41).

The vehicle (50) parked in the parking space (41) has an effect of suppressing an increase in the in-vehicle temperature and an effect of suppressing deterioration of in-vehicle facilities due to ultraviolet rays because the solar cell sheet (11) serves as a roof.
As the owner of the parking lot, while providing a value-added parking space that provides charging facilities for electric vehicles, the roof that was necessary with conventional solar power generation systems is unnecessary, reducing the equipment cost. It is possible to suppress.

(Variation 1 of the first invention)
The first invention can also provide the following variations.
That is, the parking space (41) is provided with a loading / unloading detection device (21) for detecting that the vehicle (50) has been loaded and unloaded, and the data detected by the loading / unloading detection device (21). A central control device (30) is provided that gives a command to the power supply device (17) to switch to a power supply mode for supplying power to the vehicle (50) based on the power supply mode.

(Function)
When the entry / exit detection device (21) detects entry into a certain parking space (41), the central control device (30) gives a command to switch to the power supply mode to the power supply device (17). When the parked vehicle (50) is an electric vehicle, the power feeding device (17) can be used, and the parking time is used to charge the vehicle (50) from the power of the power storage device (16). Yes.
Since the entry / exit detection device (21) can detect entry / exit, it is also possible to send a signal to output full / empty information.

(Variation 2 of the first invention)
The first invention can also provide the following variations.
That is, the central control device (30) includes a power generation confirmation unit (31) that confirms the presence or absence of power generation by the solar cell sheet (11) in each parking space (41).

(Function)
Since the presence or absence of power generation by each solar cell sheet (11) can be confirmed by the power generation confirmation unit (31), in the parking space (41) where the solar cell sheet (11) not generating power is installed, the parked automobile (50 ) Is not covered with the solar cell sheet (11), or the car (50) has left the car with the solar cell sheet (11) placed behind the parking space (41). can do. Based on the determination, the problem can be appropriately dealt with.

  According to the present invention, it was possible to provide a solar power generation system capable of installing a solar cell panel in an area called a parking lot while suppressing the equipment burden.

It is a top view which shows roughly the solar energy power generation system in the parking lot of embodiment of this invention. It is an enlarged plan view of the parking space of FIG. It is a perspective view which shows the state which parked the motor vehicle in the parking space.

Embodiments of the present invention will be described below with reference to the drawings.
Please refer to FIG. 1 and FIG. The solar power generation system 10 in the parking lot according to the present embodiment is provided in a wide area parking lot 40 having a plurality of parking spaces 41, for example.

  In each parking space 41, a flexible solar cell sheet 11 is laid so as to almost cover the ground area. The solar cell sheet 11 can open the entrance / exit side of the automobile 50 in the parking space 41, and one side edge on the rear side of the solar cell sheet 11 is formed on the rear side of the parking space 41 using a plurality of seat fixtures 12. It is fixed to the ground.

  The sheet fixture 12 may be a metal fitting that can fix the solar cell sheet 11 in the form of a sheet to the ground (paved asphalt if paved). For example, there is a seat fixture in the form of a hollow shaft with a flange at the head and an anchor. Although not shown, the tip of the anchor has two or three longitudinal grooves, and a screw is provided on the head side of the hollow portion of the anchor. Further, by inserting a rod-like body into the hollow portion, the rod-like body has a structure in which the tip opens outward from the vertical groove. Furthermore, there is a presser bolt that includes a presser part for pressing the sheet-like material and has a screw part that is screwed into the screw of the hollow part of the anchor.

  As a method of attachment, a hole is made in advance in the ground of the parking space 41, the anchor is inserted into the hole, a rod-like body is inserted into the hollow portion, and the anchor is fixed to the ground. On the other hand, the solar cell sheet 11 is provided with a through hole in advance. The solar cell sheet 11 can be fixed by the pressing portion by inserting the pressing bolt into the through hole of the solar cell sheet 11 and screwing it into the screw of the hollow portion of the anchor. If the holding bolt is loosened, the solar cell sheet 11 can be removed.

  The sheet fixture 12 described above is an example and is not limited. For example, the solar cell sheet 11 may be directly fixed to the ground with an anchor having a pressing part for pressing the sheet-like material, but the solar cell sheet 11 can be removed as described above. However, since it becomes easy when the solar cell sheet 11 is maintained (for example, removal of dirt) or replaced with a new solar cell sheet 11, it is desirable.

  Further, the solar cell sheet 11 may be attached to the ground easily and detachably on one side edge of the front side using a simple fastener or the like. Thereby, even when a strong wind blows, the solar cell sheet 11 can be held in a state spread on the ground so as not to be disturbed. However, if convenience is taken into consideration, the front side of the solar cell sheet 11 is not fixed to the ground, but rather can be held in a state of being spread on the ground with a certain weight (that is, not too heavy) of the solar cell sheet 11. desirable.

  The solar cell sheet 11 is formed, for example, by sandwiching a planar dye-sensitized solar cell from above and below with a flexible transparent plastic film or plastic sheet. In a dye-sensitized solar cell, for example, a semiconductor containing titanium oxide for supporting a photosensitizing dye and an electrolyte (electrolytic solution) in which iodine is dissolved are enclosed between an upper electrode and a lower electrode. For example, the semiconductor is in contact with the upper electrode, and the gap between the semiconductor and the lower electrode is filled with the electrolyte. In addition, the semiconductor and the electrolyte are partitioned for each cell between the upper electrode and the lower electrode.

  When light transmitted through the plastic film strikes the semiconductor, the dye in the battery becomes excited and emits electrons. The emitted electrons reach the transparent upper electrode via the semiconductor titanium oxide and flow to the outside. On the other hand, the dye that has become a cation by emitting electrons receives the electrons supplied from the lower electrode via iodine in the electrolyte, and returns to its original state. Photovoltaic generation is performed.

  Although not shown, the DC power generated by the solar cell sheet 11 in each parking space 41 is transmitted by, for example, the power storage cable 13 wired in underground piping or a piping groove of the parking lot 40. At that time, in order to confirm whether or not power is generated by each solar cell sheet 11 in each parking space 41, that is, whether or not power is generated by each solar cell sheet 11, the energization detector 14 detects energization of each wiring. Is done. Data detected by the energization detector 14 is transmitted to the central controller 30.

  The DC power transmitted by the power storage cable 13 is converted into AC power by a power conditioner 15 (PCS), and the converted AC power is stored in a power storage device 16 such as a storage battery. The power conditioner 15 (PCS) and the power storage device 16 are provided, for example, at one location of the wide-area parking lot 40 so that the power generated by the solar cell sheets 11 in all the parking spaces 41 of the parking lot 40 is collected. It is done.

  The wide-area parking lot 40 is provided with a power feeding device 17 that feeds power from the power storage device 16 to the automobile 50 that has entered the parking space 41. In the power supply device 17, a voltage regulator for supplying power in a state adjusted to a voltage suitable for a secondary battery (vehicle battery) (not shown) mounted in the automobile 50 stored in each parking space 41, Measuring instruments such as a voltmeter and an ammeter for measuring charging power for charging each automobile 50 are provided. Furthermore, various devices for measuring the charging time and the amount of charging power at the start and end of power supply are provided. The power feeding device 17 is connected to the central control device 30.

  The electric power adjusted by the voltage regulator of the power feeding device 17 is supplied to each parking space 41 by the power feeding cable 18 wired in the underground piping or the piping groove of the parking lot 40 in the same manner as the power storage cable 13 described above, for example. The power is transmitted to the charging station 19 provided in. The charging stand 19 is provided with a charging connector (not shown) for charging the power supplied by the power supply device 17 to the vehicle battery of the automobile 50.

  As shown in FIG. 3, the photovoltaic power generation system 10 in the parking lot according to the present embodiment is provided with an entry / exit detection device 21 that detects that the automobile 50 has entered and exited each parking space 41. Yes. As the entry / exit detection device 21, a sensor that detects the automobile 50 is generally used and is provided in each parking space 41. This sensor uses, for example, an entry / exit detection electric wire cable 22 wired along the underground electric pipe of the parking lot 40 or the electric storage electric wire cable 13 in the pipe groove, so that the information detected by the sensor is centrally controlled. 30.

  The central control device 30 is provided with a power generation confirmation unit 31 that confirms the presence or absence of power generation by the solar cell sheet 11 in each parking space 41 based on the data detected by the energization detector 14 described above. In addition, an entry / exit determination unit 32 that determines entry / exit of the automobile 50 in each parking space 41 based on the data detected by the entry / exit detection device 21 described above is provided.

  The central controller 30 supplies the power supply device 17 with a command to switch to a power supply mode in which power is supplied to the automobile 50 when the entry / exit determination unit 32 confirms the entry of the automobile 50 into a certain parking space 41. A portion 33 is provided.

  Since the solar cell sheet 11 is laid in each parking space 41 of the wide-area parking lot 40 so as to almost cover the ground area, the parking space 41 in an empty state where the automobile 50 is not parked is configured. Electric power is generated by each solar cell sheet 11. The DC power generated at this time is transmitted by the power storage cable 13, converted to AC power by the power conditioner 15, and efficiently stored in the power storage device 16 provided at one location of the wide area parking lot 40.

  On the other hand, when the automobile 50 parks (enters) in the parking space 41, the front side of the solar cell sheet 11 is held and the entire solar cell sheet 11 is moved to the rear side of the parking space 41 to open the parking space 41. The automobile 50 is parked in the parking space 41. At this time, the tire 51 of the automobile 50 stops at a car stop 52 provided in the parking space 41. Next, as shown in FIGS. 2 and 3, the solar cell sheet 11 is placed on the automobile 50.

  Therefore, even when the automobile 50 is parked in the parking space 41, power is generated by the solar cell sheet 11 placed on the automobile 50, and the generated DC power is the energization detector as described above. 14, the power is stored in the power storage device 16 via the power conditioner 15.

  Since whether or not electricity is generated by each solar cell sheet 11 can be confirmed by the power generation confirmation unit 31 depending on whether or not the energization detector 14 detects energization of the wiring that transmits the power of each solar cell sheet 11, In the parking space 41 in which the battery sheet 11 is installed, the solar cell sheet 11 is not covered on the parked automobile 50, or the solar cell sheet 11 is left behind the parking space 41 and the automobile It can be determined that 50 has been issued. Therefore, it is possible to appropriately deal with the above-mentioned problems based on the determination. The solar cell sheet 11 can be put on the parked automobile 50, or the device can be devised for encouraging the vehicle to be released after the solar cell sheet 11 is expanded in the parking space 41.

From the above, even if the parking lot 40 is not provided with a roof, it is possible to effectively utilize the ground of the parking lot 40 by providing the flexible solar cell sheet 11 so as to cover the ground of each parking space 41. In addition, since it is provided on the ground, there is an advantage that the equipment burden can be reduced.
On the other hand, since the solar cell sheet 11 can be put on the automobile 50 parked in the parking space 41 as shown in FIG. 2 and FIG. There is no hindrance.

  When the car 50 is parked in the parking space 41, power supply control is performed based on the determination of the parking state (the warehousing state) by the warehousing / determining unit 32 of the central controller 30 based on the data detected by the warehousing / exiting detection device 21. When the photovoltaic power generation system 10 is switched to the power supply mode according to the command of the unit 33, the power of the power storage device 16 is transmitted by the power supply device 17 to the charging stand 19 of the corresponding parking space 41 by the power supply cable 18. The vehicle 50 parked in the parking space 41 can be charged to the vehicle battery of the vehicle 50 from a charging connector (not shown) of the charging stand 19 using the parked time.

  In the solar power generation system 10 in the parking lot according to the present embodiment, the fullness information display board for displaying information indicating whether or not each parking space 41 is vacant at the entrance of the wide area parking lot 40, so-called fullness information. 42 can be provided. For example, as shown in FIG. 1, the vacancy information display board 42 displays the layout of all parking spaces 41 of the wide area parking lot 40 at a glance. The location corresponding to the space is turned on as shown by hatching in FIG. 1, and when the vehicle is empty, the location corresponding to the parking space is turned off as shown by the blank in FIG. A parking state and an empty vehicle state are displayed at a glance.

Although not shown in the figure, a pole provided with an indicator lamp on the top can be set up behind each parking space 41. That is, when the parking space 41 is parked, the indicator light is turned on, and when the parking space 41 is empty, the indicator light is turned off.
Along with this, the central control device 30 grasps the entering / exiting state of each parking space 41 determined by the entry / exit judgment unit 32, collects the full information, and displays the full information. 42 and a full / empty display command section 34 for transmitting to an external display section such as an indicator lamp provided in each parking space 41 is provided.

  By providing a full space information display board 42 at the entrance of the wide-area parking lot 40 or by providing an indicator light at the rear of each parking space 41, it can be opened free of charge like a public parking lot. Also in the parking lot 40, the full / empty display command unit 34 of the central control device 30 collects full / vacant information by grasping the entering / exiting state of each parking space 41 determined by the input / output determining unit 32, and the full / empty information. Can be displayed on an external display unit such as a full / vacant information display board 42 or an indicator lamp of each parking space 41. Thereby, the driver of the car 50 can easily check the empty parking space 41 at a glance from the driver's seat.

DESCRIPTION OF SYMBOLS 10 Photovoltaic power generation system 11 Solar cell sheet | seat 12 Sheet | seat fixture 13 Electric power storage cable 14 Power supply detector 15 Power conditioner (PCS)
Reference Signs List 16 Power Storage Device 17 Power Supply Device 18 Power Supply Cable 19 Charging Stand 21 Entry / Exit Detection Device 22 Entry / Exit Detection Wire Cable 30 Central Controller 31 Power Generation Confirmation Unit 32 Entry / Exit Judgment Unit 33 Power Supply Control Unit 34 Full Display Command Unit 40 Parking lot (wide-area parking lot) 41 Parking space 42 Fully empty information display board 50 Automobile 51 Tire 52 Car stop

Claims (3)

In a parking lot having one or more parking spaces (41),
A flexible solar cell sheet having a size substantially covering the parking space;
A sheet fixture for fixing one side edge of the rear side of the solar cell sheet to the ground on the rear side opposite to the entrance / exit side of the automobile in the parking space;
A power storage device for storing electric power generated by the solar cell sheet;
A power feeding device that feeds power from the power storage device to the car that has entered the parking space;
Solar power generation system equipped with. The parking space includes a loading / unloading detection device for detecting that a vehicle has been loaded and unloaded,
The solar power generation system in a parking lot according to claim 1, further comprising: a central control device that gives a command to the power supply device to switch to a power supply mode for supplying power to the vehicle based on data detected by the storage detection device. .   The solar power generation system in a parking lot according to claim 2, wherein the central control device includes a power generation confirmation unit that confirms whether or not power is generated by a solar battery sheet in each parking space.

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