JP2021164251A - Power system using photovoltaic device - Google Patents

Abstract

To provide efficient battery charging and a battery by the wasteless use of light existent in an environment without depending on commercial power supply.SOLUTION: A power system includes: a battery housing part (402) which stores a plurality of batteries (30) in a receivable/extractable manner; a photovoltaic device (10) having a first photovoltaic panel (11) overlaid with a second photovoltaic panel (12); a charging circuit (401) which charges the batteries using the photoelectromotive force of the first photovoltaic panel and the photoelectromotive force of the second photovoltaic panel; and a management unit (404) which charges the plurality of batteries by a charging circuit to provide a registered user with the batteries from battery housing means. Photovoltaic power generation is performed by making first light incident from the first photovoltaic panel side and second light incident from the second photovoltaic panel side, so that the first photovoltaic panel performs photovoltaic from the first light and the second light transmitted through the second photovoltaic panel, and the second photovoltaic panel performs photovoltaic from the second light and the first light transmitted through the first photovoltaic panel.SELECTED DRAWING: Figure 9

Description

The present invention relates to a power supply system that provides a battery, and more particularly to a power supply system capable of charging a battery using photovoltaic power.

Many power supply systems that use photovoltaic power generation to charge batteries have been proposed. For example, Patent Document 1 describes a charging system for a battery for an electric vehicle using solar power generation and a commercial power source, and Patent Document 2 describes a solar charger that charges a mobile device using a dye-sensitized solar cell. Is disclosed.

Further, in the solar cell panel disclosed in Patent Document 3, a plurality of transparent resins containing light-collecting dyes in different wavelength ranges are laminated, a solar cell is provided at the edge of each layer, and a solar cell is further arranged at the bottom layer. It has the above-mentioned configuration.

A power supply system that rents a charged battery has also been proposed. For example, Patent Document 4 discloses a rental system for a battery for an electric vehicle.

Japanese Unexamined Patent Publication No. 2014-054022 JP-A-2019-149583 Japanese Unexamined Patent Publication No. 7-131051 JP-A-2002-291110

However, in the above-mentioned Patent Documents 1 and 2, only the sunlight is converted into electric power by the solar cell panel and taken out. For this reason, the power generation efficiency depends only on the photoelectric conversion efficiency of the solar cell panel itself, and it has not been easy to further improve the photovoltaic power generation efficiency.

Further, the solar cell panel disclosed in Patent Document 3 is intended to maximize the power conversion efficiency of incident sunlight. Therefore, the solar cell panel of Patent Document 3 also depends only on sunlight, and the power generation efficiency depends only on the photoelectric conversion efficiency of the solar cell panel itself.

Further, the power supply system disclosed in Patent Document 4 is premised on charging by a commercial power source, and therefore, in the event of a power failure due to the occurrence of a disaster or the like, it is not possible to provide a service.

Therefore, an object of the present invention is to provide a power supply system that enables efficient battery charging and battery provision without depending on a commercial power source by utilizing the light existing in the environment without waste.

According to one aspect of the present invention, the battery accommodating means (402) for accommodating and retrievably accommodating a plurality of batteries (30), and the first optical power generation panel (11) and the second optical power generation panel (12) are provided. The battery (30) is charged using the stacked photopower generation device (10), the photovoltaic power of the first photopower generation panel (11), and the photovoltaic power of the second photopower generation panel (12). A management means (404) that charges the plurality of batteries (30) by the charging circuit (401) and the charging circuit (401), and provides the registered user with the battery (30) from the battery accommodating means (402). ), And the first light is incident from the first photopower generation panel (11) side, and the second light is incident from the second photopower generation panel (12) side. The panel (11) generates photopower from the first light and the second light transmitted through the second photopower generation panel (12), and the second photopower generation panel (12) generates the second light. And the first light that has passed through the first photopower generation panel (11), photopower is generated. As a result, when the first light and the second light are incident from both sides of the photovoltaic power generation device, the first photovoltaic power generation panel performs photoelectric conversion of the first light and further transmits the second photovoltaic power generation panel. Photoelectric conversion of the second light is also performed. At the same time, the second photovoltaic panel performs photoelectric conversion of the second light, and further performs photoelectric conversion of the first light transmitted through the first photovoltaic panel. In this way, the light incident from both sides of the photovoltaic power generation device can be used for power generation, and the light existing in the environment can be used without waste with a simple configuration to improve the power generation efficiency. In addition, various services such as battery rental can be provided only by photovoltaic power generation.
The first photovoltaic panel (11) is composed of a transparent or translucent first solar cell panel (101), and the second photovoltaic panel (12) is a condensing panel (102) and the condensing panel (102). It can be composed of a second solar cell panel (103) provided on the edge surface of 102). As a result, the first solar cell panel (101) can perform efficient photoelectric conversion by receiving the first light on the entire surface, and the second solar cell panel (103) can perform photoelectric conversion in a desired wavelength range. Become.
The light-collecting panel (102) can be a transparent plate in which a fluorescent dye that absorbs light in a predetermined wavelength region and re-emits light in the predetermined wavelength region is dispersed in a transparent medium. As a result, light in a predetermined wavelength range can be efficiently collected and used for power generation.
The second solar cell panel (103) may be a solar cell panel that does not transmit light. For example, the second solar cell panel is a substrate-mounted solar cell panel.
It may further include a system battery that can be charged by the charging circuit (401) and supplies power to the management means (404). Further, the charging circuit (401) may charge the system battery from the plurality of batteries (30) or in the opposite direction. As a result, the photovoltaic power generation can be interchanged with each other for efficient use.

As described above, according to the present invention, by utilizing the light existing in the environment without waste, it is possible to efficiently charge the battery and provide the battery without depending on the commercial power source.

It is a figure which shows an example of the photovoltaic power generation device used in the power source system by one Embodiment of this invention. It is a figure which shows the schematic structure of the photovoltaic power generation device used in the power source system by this embodiment. It is a figure which shows an example of the battery rental server which is the power supply system by this embodiment. It is a perspective view which shows the schematic structure of the battery rental server which is the power supply system by this embodiment. It is a schematic plan view seen from the battery return port side of the battery rental server shown in FIG. It is a front view (A), a plan view (B) and a side view (C) of the battery used in the battery rental server shown in FIG. It is a side configuration view which shows schematic the internal structure of the battery rental server shown in FIG. It is a block diagram which shows the circuit structure of the battery rental server shown in FIG. It is a sequence diagram which shows an example of the battery lending / returning method in the battery rental server shown in FIG. It is a figure which shows the schematic structure of the power supply system by another embodiment of this invention.

<Outline of Embodiment>
According to the embodiment of the present invention, a plurality of batteries are housed so as to be acceptable / removable, and the photovoltaic power of the first photovoltaic power generation panel and the photovoltaic power of the second photovoltaic power generation panel superimposed on the first photovoltaic power generation panel. A plurality of batteries are charged using and, and a charged battery is provided to a registered user. For example, when the first photovoltaic power generation panel is installed outdoors and the second photovoltaic power generation panel is installed indoors, the first photovoltaic power generation panel performs photoelectric conversion of outdoor light and further transmits the second photovoltaic power generation panel. It also performs photoelectric conversion of indoor light. At the same time, the second photovoltaic panel performs photoelectric conversion of indoor light, and further performs photoelectric conversion of outdoor light transmitted through the first photovoltaic panel.

As described above, according to the embodiment of the present invention, the light incident from both sides of the photovoltaic power generation device can be used for power generation, and the light existing in the environment can be utilized without waste in a simple configuration to improve the power generation efficiency. Can be made to. In particular, even in the event of a power outage in the event of a disaster, efficient battery charging and battery provision are possible without relying on commercial power sources. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the components described in the following embodiments are merely examples, and the technical scope of the present invention is not limited to them.

1. 1. One Embodiment As illustrated in FIG. 1, the power supply system according to one embodiment of the present invention is a system that charges and provides a plurality of batteries, includes a photovoltaic power generation device 10 and a charging circuit 20, and the charging circuit 20 is optical. The photovoltaic power output from the power generation device 10 is converted into electric power to charge the battery 30.

As illustrated in FIGS. 1 and 2, the photovoltaic power generation device 10 has a configuration in which the first photovoltaic power generation panel 11 and the second photovoltaic power generation panel 12 are overlapped. The first photovoltaic power generation panel 11 and the second photovoltaic power generation panel 12 may be stacked with separate panels separated by a certain space, or the first photovoltaic power generation panel 11 and the second photovoltaic power generation panel 12 may be stacked on a transparent substrate. It may be a laminated structure. The first photovoltaic panel 11 and the second photovoltaic panel 12 convert incident light into electrical energy, but may transmit a specific wavelength range. The first photovoltaic panel 11 may be a transparent or translucent solar cell, and for example, a thin film type or an organic thin film type solar cell film can be used.

As illustrated in FIG. 2, the second photovoltaic power generation panel 12 includes a condensing panel 102 and a solar cell panel 103 provided on an edge surface thereof. In the present embodiment, solar cell panels 103 are provided on each of the four sides of the condensing panel 102, and they are connected in series. The light-collecting panel 102 is a transparent plate in which a fluorescent dye is uniformly dispersed in a transparent medium such as acrylic, and is also called an LSC (Luminescent Solar Concentrator). Of the incident light, light of a specific wavelength is trapped by the fluorescent dye and re-emitted. The re-emitted specific wavelength light repeats total internal reflection on the main surface of the condensing panel 102 and is focused on the edge. Light that is not trapped by the fluorescent dye becomes transmitted light.

The light emitted from the edge in this way is converted into electrical energy by the solar cell panel 103. The solar cell panel 103 is a solar cell panel composed of a solar cell arrangement formed on a semiconductor substrate that does not transmit light, and is mounted on a substrate capable of photoelectric conversion of not only light emitted from an edge but also light having a wide range of wavelengths. Is desirable. Alternatively, the solar cell panel 103 may have high efficiency in the wavelength range trapped and re-emitted by the fluorescent dye. It is also possible to increase the area of the edge surface of the light-collecting panel 102 to increase the ratio to the area of the incident surface to increase the light-collecting ratio.

Returning to FIG. 1, the solar cell panel 101 of the first photovoltaic power generation panel 11 and the condensing panel 102 of the second photovoltaic power generation panel 12 may be covered with the transparent protective cover 104. In this case, the refractive index of the transparent protective cover 104 is selected to cause total internal reflection within the light-collecting panel 102 described above with the refractive index of the transparent material of the light-collecting panel 102. As another configuration, the solar cell panel 101 and the condensing panel 102 may be laminated on the front surface and the back surface of a transparent plate such as acrylic or a transparent polarizing plate.

The solar cell panel 101 of the first photovoltaic power generation panel 11 converts the first light incident from the outside into electric energy, and further converts the second light transmitted through the condensing panel 102 into electric energy. Outputs photovoltaic power V1. Further, the solar cell panel 103 of the second photovoltaic cell panel 12 converts the second light incident on the condensing panel 102 from the outside into electric energy, and further converts the first light transmitted through the solar cell panel 101 into electricity. By converting it into energy, the photovoltaic power V2 is output.

In FIG. 1, the charging circuit 20 converts the photovoltaic powers V1 and V2 input from the solar cell panels 101 and 103 into required output voltages by a DC-DC converter or the like, and charges the battery 30. Such a charging circuit 20 is known as an energy harvesting technique.

As described above, the power supply system according to the embodiment of the present invention has a configuration in which the photovoltaic power generation device 10 has a first photovoltaic power generation panel 11 and a second photovoltaic power generation panel 12 overlapped with each other. Therefore, when the first light and the second light are incident from both sides of the photovoltaic power generation device 10, the first photovoltaic power generation panel 11 performs photoelectric conversion of the first light, and further, the second photovoltaic power generation panel 12 is subjected to photoelectric conversion. Photoelectric conversion of the transmitted second light is also performed. At the same time, the second photovoltaic panel 12 performs photoelectric conversion of the second light, and further performs photoelectric conversion of the first light transmitted through the first photovoltaic panel 11. In this way, the light incident from both sides of the photovoltaic device 10 can be used for power generation, and the power generation efficiency can be improved with a simple configuration.

2. Examples The power supply system according to the above-described embodiment can be applied to various battery charging systems. Hereinafter, as an embodiment, a battery rental system in which a plurality of users can share a battery will be described with reference to FIGS. 3 to 10.

2.1) Battery rental server As illustrated in FIG. 3, the battery rental server 40 includes the above-mentioned power supply system 1 as a power source. By installing the photovoltaic power generation device 10 in a window (W) of a building or the like, sunlight or outdoor light (first light) and indoor light (second light) are converted into electric power and used for battery charging. Since the battery can be charged simply by installing the photovoltaic power generation device 10, it does not require a commercial power source and can be used in the event of a power outage due to a disaster.

As illustrated in FIG. 4, the battery rental server 40 has a battery return port 41, a battery outlet 42, and an authentication window 43, and the battery return port 41 and the battery outlet 42 have a protective opening / closing cover 44 and opening / closing, respectively. The door 45 is attached. It is desirable that the opening / closing door 45 of the outlet 42 is transparent. As will be described later, the user authentication is performed by reading the authentication information displayed on the user terminal 50 through the authentication window 43. When the user is authenticated, the battery rental server 40 drops the battery 30 for the mobile terminal into the battery outlet 42, and the user opens the open / close door 45 and takes out the battery 30 from the battery outlet 42. The user returns the used battery 30 to the battery return port 41.

As illustrated in FIG. 5, when the opening / closing cover 44 of the battery return port 41 is opened, a battery inlet 46 having the same cross-sectional shape as the battery 30 is provided on the upper surface of the battery rental server 40. Since the battery guide rail 47 is provided in the battery inlet 46, the user only needs to insert the returned battery 30 in accordance with the battery inlet 46.

As illustrated in FIG. 6, the battery 30 is provided with a guide groove 31 and an inclined portion 32 in the thickness direction. As a result, the shape of the battery 30 becomes asymmetrical in the left-right and up-down directions, and the insertion direction of the battery 30 is defined. Since positive and negative electrodes 33 are provided at the rear end of the upper surface of the battery 30, the position of the electrodes 33 can be correctly determined simply by inserting the battery 30 into the battery insertion port 46 shown in FIG.

In FIG. 7, when the user inserts the return battery 30 into the battery inlet 46, the battery 30 lowers by engaging the guide groove 31 with the battery guide rail 47, and is stacked on the already stored battery to start charging. NS. Further, if the user requests a loan, the batteries that have been fully charged after being authenticated are sequentially dropped to the battery outlet 42. Battery charging and removal is controlled by the management device 48. As the power source for the management device 48, the photovoltaic power from the above-mentioned photovoltaic device 10 is supplied through the cable 49. Hereinafter, the configuration of the management device 48 will be described with reference to FIG.

2.2) Management device As illustrated in FIG. 8, the management device 48 in the battery rental server 40 includes a charging circuit 401, a battery storage unit 402, an authentication unit 403, and a rental management unit 404 connected to the photopower generation device 10. And the server power supply circuit 405. The photovoltaic power generation device 10 and the charging circuit 401 are as described with reference to FIGS. 1 and 2. The charging circuit 401 sequentially charges a plurality of batteries 30 (denoted as BAT1, BAT2, ... BATn in the figure) stored in the battery accommodating portion 402, and monitors their charging states. The battery storage unit 402 stores a plurality of batteries 30 in a rechargeable manner, and if there is a rental instruction, sequentially provides the user with the batteries that have been charged as described above.

The authentication unit 403 reads the authentication information displayed on the user terminal 50 through the authentication window 43, and authenticates the user. The authentication information is information acquired by the user from the service provider in advance or on the spot, and can be displayed as a QR code on the display unit of the user terminal 50, for example. As another method, the authentication information may be transmitted to the authentication unit 403 by short-range wireless communication or infrared communication. Further, the authentication unit 403 has a communication function, and can access the server of the service provider from the QR code presented by the user to perform the authentication determination of the QR code.

When the user is authenticated by the authentication unit 403, the rental management unit 404 outputs a rental OK instruction to the battery storage unit 402. Upon receiving this, the battery storage unit 402 drops the fully charged battery 30 to the battery outlet 42 and lends it to the user, and outputs the identification number of the rented battery 30 to the rental management unit 404 as loan information. The rental management unit 404 performs user management and battery rental / return management by associating the ID information of the user with the identification number of the rented battery. After lending the battery, if it is not returned within the specified period, the user can be identified.

The battery rental server 40 is provided with a server power supply circuit 405 as its own power source, and the charging circuit 401 can also charge the server battery (not shown) in the server power supply circuit 405 using the photopower generation device 10. The server power supply circuit 405 can complementarily charge the server battery and the rental battery by using a commercial power supply. Alternatively, the rental battery can be charged from the server power supply circuit 405 through the charging circuit 401.

2.3) Authentication method As illustrated in FIG. 9, the authentication unit 403 of the battery rental server 40 authenticates the user, and the user acquires the authentication information used at that time from the service provider's server 60. Can be done. It is assumed that the user terminal 50 is a so-called "smartphone" and can communicate with the server 60 on the Internet through the mobile network. Similarly, the battery rental server 40 may be able to communicate with the server 60 on the Internet via a wireless LAN or the like.

If the user has already registered in the server 60, the user starts a predetermined application for battery rental from the user terminal 50, accesses the server 60, and transmits a request for issuing authentication information (operation 502). This issuance request includes the user's ID information. The user ID information includes information for identifying the user, a date and time when registration is requested, a place, a battery identification number set in the user terminal 50, a voltage log, and the like. The location information may be the location information of the user terminal 50. Alternatively, a QR code recording the position information of the server 40 or the like is prepared in front of the battery rental server 40, and the same ID information can be transmitted to the server 60 by inputting the QR code with the camera mounted on the user terminal 50. good.

When the server 60 receives the issuance request from the user terminal 50, the server 60 authenticates the user by referring to the user's ID information (operation 503). If the user is a legitimate registrant, a QR code indicating that the user is a legitimate registrant is issued to the user terminal 50 (operation 504). The user terminal 50 stores the issued QR code (operation 505). Subsequently, the user displays the QR code on the display unit of the user terminal 50 and holds it over the authentication window 43 of the battery rental server 40 (operation 506). The QR code may be acquired in advance and displayed on the display unit when necessary.

When the authentication unit 403 of the battery rental server 40 inputs the image information of the QR code from the authentication window 43, it decrypts the QR code and reads out the necessary information, and whether the user making the rental request is a legitimate registrant. It is determined whether or not (operation 507). At that time, the authentication unit 403 can send necessary information (ID information) to the server 60 to inquire whether or not the user is a legitimate registrant. If it is a legitimate registrant, it is determined that the battery rental is "possible", and the charged battery 30 is provided as described above. At that time, the identification number of the provided battery 30 and the information of the user are associated with each other and stored in the storage device for loan / return management.

When returning the battery 30 rented by the user, first, the held QR code is displayed on the display unit of the user terminal 50 and held over the authentication window 43 of the battery rental server 40 (operation 508). When the authentication unit 403 of the battery rental server 40 inputs the image information of the QR code from the authentication window 43, it decrypts the QR code, reads out the necessary information, and collates it with the held user information for loan / return management. .. If they match, the battery 30 is prompted to be inserted into the battery return port 41, and if the identification number of the returned battery 30 matches that of the rented battery, the return is confirmed (operation 509). At that time, the authentication unit 403 may send user information to the server 60 to inquire whether or not the user is a legitimate registrant.

It is desirable to deposit a deposit at the time of user registration in consideration of the case where the user loses or damages the battery 30. Further, in this embodiment, the rental management unit 404 performs user management and loan / return management, but the server 60 on the network can also perform the same management. In that case, the rental management unit 404 of the battery rental server 40 becomes unnecessary, so that the power consumption can be reduced.

2.4) Effect As described above, the battery rental server using the power supply system according to the embodiment of the present invention can be installed outdoors such as sunlight by installing the photovoltaic power generation device 10 in a building window or the like (W). Both light (first light) and indoor light (second light) can be converted into electric power and used for battery charging. As a result, it is possible to continue the mobile power supply service even in the event of a power outage due to a disaster without the need for a commercial power supply.

In addition, by supplementarily charging the server battery and rental battery using a commercial power source, it is possible to exchange power between the server battery and the rental battery in the event of a power outage, and further effective use of power can be achieved. It will be possible.

3. 3. Other Embodiments In the above-described embodiments and examples, the photovoltaic power generation device 10 in which the first photovoltaic power generation panel 11 and the second photovoltaic power generation panel 12 are stacked is used, but the present invention is not limited thereto.

As illustrated in FIG. 10, a plurality of photovoltaic power generation devices 10 may be foldably connected to each other. Since the photoelectric conversion area becomes large, more efficient power generation becomes possible. Further, by folding the plurality of photovoltaic power generation devices 10 in a folding screen shape, it is excellent in carrying and has an advantage that restrictions on the installation location of the battery rental server 40 can be relaxed.

1 Power system 10 Photovoltaic device 11 1st photovoltaic panel 12 2nd photovoltaic panel 101 Solar cell panel 102 Condensing panel 103 Solar cell panel 104 Transparent protective cover 20 Charging circuit 30 Battery 40 Battery rental server 41 Battery return port 42 Battery outlet 43 Certification window

Claims (7)

Battery storage means for storing multiple batteries so that they can be received / removed,
A photovoltaic device in which a first photovoltaic panel and a second photovoltaic panel are stacked, and
A charging circuit that charges the battery using the photovoltaic power of the first photovoltaic power generation panel and the photovoltaic power of the second photovoltaic power generation panel.
A management means for charging the plurality of batteries by the charging circuit and providing the batteries from the battery accommodating means to a registered user.
Have,
The first light is incident from the first photovoltaic power generation panel side, and the second light is incident from the second photovoltaic power generation panel side.
The first photovoltaic power generation panel generates photovoltaic power generation from the first light and the second light transmitted through the second photovoltaic power generation panel.
A power supply system in which the second photovoltaic power generation panel generates photovoltaic power from the second light and the first light transmitted through the first photovoltaic power generation panel. The first photovoltaic power generation panel is composed of a transparent or translucent first solar cell panel.
The second photovoltaic power generation panel comprises a condensing panel and a second solar cell panel provided on an edge surface of the condensing panel.
The power supply system according to claim 1. The power supply according to claim 2, wherein the light-collecting panel is a transparent plate in which a fluorescent dye that absorbs light in a predetermined wavelength range and re-emits the light in the predetermined wavelength range is dispersed in a transparent medium. system. The power supply system according to claim 2 or 3, wherein the second solar cell panel is a solar cell panel that does not transmit light. The invention according to any one of claims 1-4, wherein the photovoltaic power generation device is installed in a window of a building so that the first light becomes outdoor light and the second light becomes indoor light. Power system. The power supply system according to any one of claims 1-5, further comprising a system battery that can be charged by the charging circuit and supplies power to the management means. The power supply system according to claim 6, wherein the charging circuit charges the system batteries from the plurality of batteries or in the opposite direction.

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