TWI455337B - Solar apparatus for supplying electricity and illuminating system having the same - Google Patents

Description

Solar power supply device and lighting system including the same

The present invention relates to the field of solar energy technologies, and in particular, to a solar power supply device and an illumination system including the same.

At present, most of the ordinary lighting sources use an external power source that is electrically connected thereto as a lighting power source, thereby consuming a large amount of power, which is not conducive to the sustainable development of energy.

Because of its inexhaustible advantages, solar cells have become a research hotspot in the energy field and are widely used in various fields of social life. Solar cells use solar panels to convert solar radiant energy photons into electrical energy via semiconductor materials, see "Grown junction GaAs solar cell", Shen, CC; Pearson, GL; Proceedings of the IEEE, Volume 64, Issue 3, March 1976, Page 384-385.

In recent years, a solar lighting system has emerged that includes solar panels, lighting fixtures, batteries, and control circuitry. The solar panel and the lighting fixture are respectively connected to the battery by a control circuit, and the control circuit is used for storing the electric energy generated by the solar panel to the battery, and simultaneously controlling the opening and closing of the lighting fixture.

However, the capacity of solar panels is limited, and such solar lighting systems are difficult to provide greater photovoltaic power generation efficiency and more power. In order to meet the demand for high-power electricity, it is usually required To increase the number of solar panels. However, due to limitations in surface area and appearance, modern housing and other building, automotive and other mobile modules, and even various portable electronic modules are difficult to provide a large number of places to lay a large number of solar panels, coupled with the high cost of solar panels themselves, these factors The use of solar cells for lighting is subject to certain restrictions.

In view of the above, it is necessary to provide a solar power supply device capable of improving photovoltaic power generation efficiency including the lighting system of the power supply device.

A solar power supply device includes a power generation module, a control module, and an energy storage module. The control module is respectively connected to the power generation module and the energy storage module, and is configured to control the power generation module to convert the light energy into electrical energy and store the electrical energy in the energy storage module. The power generation module includes a solar panel and a concentrating module. The concentrating module includes at least one lens module opposite to the solar panel for collecting sunlight to the solar panel, each lens module including a lens barrel, a first lens disposed along the optical axis in the lens barrel, and a second a lens, a first spacer, a second spacer, and a light guide. The first spacer is disposed between the first lens and the second lens, and the first lens and the second lens are spherical lenses or aspherical lenses. The second spacer is disposed between the second lens and the light guide.

A lighting system includes a lighting module and a solar powered device. It includes power generation module, control module and energy storage module. The control module is respectively connected to the power generation module and the energy storage module, and is configured to control the power generation module to convert the light energy into electrical energy and store the electrical energy in the energy storage module. The power generation module includes a solar panel and a concentrating module. The concentrating module includes at least one lens module opposite to the solar panel for collecting sunlight to the solar panel, each lens module including a lens barrel, a first lens disposed along the optical axis in the lens barrel, and a second a lens, a first spacer, a second spacer, and a light guide. The first spacer is disposed between the first lens and the second lens, and the first lens and the second lens The spherical spacer or the aspherical lens is disposed between the second lens and the light guide.

The solar power supply device of the present technical solution is provided with a concentrating device for collecting sunlight, so that not only the sunlight directly irradiated onto the solar panel is converted into electric energy, but also the sunlight irradiated to the concentrating device passes through the concentrating device. The illumination is converted into electrical energy by the solar panel, thereby multiplying the photovoltaic efficiency and saving the cost without increasing the number of solar panels.

100‧‧‧Solar power supply unit

10‧‧‧Power Module

20‧‧‧Control module

30‧‧‧ Energy storage module

11‧‧‧Solar panels

12‧‧‧ concentrating device

111‧‧‧First electrode layer

112‧‧‧Semiconductor structural layer

113‧‧‧Second electrode layer

1111‧‧‧ first surface

1112‧‧‧ second surface

1121‧‧‧P type semiconductor structural layer

1123‧‧‧N type semiconductor structural layer

1122‧‧‧P-N layer

1131‧‧‧Transparent conductive layer

1132‧‧‧Metal conductive layer

121‧‧‧Mirror tube

122‧‧‧ first lens

123‧‧‧second lens

124‧‧‧First spacer

125‧‧‧Second spacer

126‧‧‧Light guide

1261‧‧‧Injection surface

1262‧‧‧Outlet

1263‧‧‧ side

1264‧‧‧ outlets

21‧‧‧DC-DC converter module

22‧‧‧Charging/discharging module

23‧‧‧ Controller

200‧‧‧Lighting device

150‧‧‧Lighting module

151‧‧‧metal layer

152‧‧‧Semiconductor layer

153‧‧‧Lighting layer

1521‧‧‧P type semiconductor layer

1523‧‧‧N type semiconductor layer

1522‧‧‧Photon excitation layer

FIG. 1 is a schematic diagram of a solar power supply device provided by an embodiment of the present technical solution.

FIG. 2 is a schematic diagram of a light guiding body of a concentrating module provided by an embodiment of the present technical solution.

FIG. 3 is a schematic diagram of an illumination system including the solar power supply device shown in FIG. 1 according to an embodiment of the present technical solution.

The solar power supply device provided by the technical solution and the illumination system including the solar power supply device will be described in detail below with reference to the embodiments and the accompanying drawings.

Referring to FIG. 1 , the solar power supply device 100 includes a power generation module 10 , a control module 20 , and an energy storage module 30 . The control module 20 is connected to the power generation module 10 and the energy storage module 30, respectively.

The power generation module 10 includes a solar panel 11 and a concentrating module 12 disposed above the solar panel 11 and disposed opposite to the solar panel 11 .

The solar panel 11 includes a first electrode layer 111, a semiconductor structure layer 112, and a second electrode layer 113 having a polarity opposite to that of the first electrode layer 111. The first electrode layer 111 has a first surface 1111 and a second surface 1112 opposite the first surface 1111. First surface 1111 A semiconductor structure layer 112 and a second electrode layer 113 are formed in this order.

The first electrode layer 111 has a thickness of about 0.1 μm to 10 μm, and the material thereof is selected from the group consisting of silver, copper, molybdenum or aluminum, and may be an alloy material such as an aluminum-copper alloy or a copper-molybdenum alloy.

The semiconductor structure layer 112 is a three-layer structure including a P-type semiconductor structure layer 1121, an N-type semiconductor structure layer 1123, and a P-N junction layer 1122 between the P-type semiconductor structure layer 1121 and the N-type semiconductor structure layer 1123.

The material of the P-type semiconductor structure layer 1121 may be a P-type amorphous germanium material, especially a P-type hydrogen-containing amorphous germanium material, or a III-V compound or a II-VI compound, especially doped aluminum and potassium. Indium semiconductor materials, such as aluminum aluminum nitride or aluminum gallium arsenide. Preferably, the material of the P-type semiconductor structure layer 1121 is a P-type amorphous germanium material. The amorphous germanium material is about 120 times stronger than the crystalline germanium material, so the thickness of the semiconductor layer made of the amorphous germanium material is much smaller than that of the crystalline germanium material when the photon absorption amount is the same. The thickness of the layer, and the amorphous germanium material has lower requirements on the substrate material. Therefore, the use of amorphous germanium materials not only saves a large amount of materials, but also makes it possible to produce large-area solar cells.

The PN junction layer 1122 is used for converting photons into electron-hole pairs and forming a barrier electric field, which may be a combination of a better combination of a III-V compound or a I-III-VI compound such as cadmium telluride or copper indium. Selenium, indium gallium selenium.

The material of the N-type semiconductor structural layer 1123 may be an N-type amorphous germanium material, in particular, an N-type hydrogen-containing amorphous germanium material, or a III-V compound or a II-VI compound, in particular, nitrogen and phosphorus doped. A semiconductor material of arsenic, such as potassium nitride or indium gallium phosphide.

The semiconductor structure layer 112 may also be a two-layer structure composed of a P-type semiconductor structure layer 1121 and an N-type semiconductor structure layer 1123.

The second electrode layer 113 is formed on the N-type semiconductor structure layer 1123, and includes a transparent conductive layer 1131 and a metal conductive layer 1132 in electrical contact with the transparent conductive layer 1131.

The transparent conductive layer 1131 is formed on the N-type semiconductor structure layer 1123, which forms an ohmic contact with the N-type semiconductor structure layer 1123. The material of the transparent conductive layer 1131 is a transparent metal oxide or a metal doped oxide such as indium tin oxide, zinc oxide, tin oxide, indium doped tin oxide, tin doped gallium oxide, tin doped silver. Indium oxide, indium tin oxide, zinc-doped indium trioxide, antimony-doped tin dioxide, or aluminum-doped zinc oxide. The transparent conductive layer 1131 has a small light absorption coefficient and allows more sunlight to pass through. Further, an antireflection film may be further formed on the transparent conductive layer 1131 to improve the utilization of sunlight.

The metal conductive layer 1132 is formed on the transparent conductive layer 1131, which is generally a comb-like structure, and is usually made of a non-transmissive metal or metal alloy material.

Referring to FIG. 1 and FIG. 2 , in this embodiment, the concentrating module 12 is a lens module, and includes a lens barrel 121 and a first lens 122 and a second lens 123 disposed in the lens barrel 121 along the optical axis. The first spacer 124, the second spacer 125, and the light guide 126. The concentrating module 12 is used to collect sunlight to the metal conductive layer 1132 of the solar panel 11, thereby multiplying the photovoltaic efficiency without increasing the number of solar panels. Of course, according to the size of the metal conductive layer 1132 of the solar panel 11, the concentrating module 12 may further include a plurality of lens modules.

The first lens 122 and the second lens 123 are spherical lenses or aspherical lenses, and are fixed in a mutual card form therebetween. A first spacer 124 is disposed between the first lens 122 and the second lens 123. The first spacer 124 can be an aperture or spacer ring that is common in the art. Of course, the first lens 122 and the second lens 123 may not be fixed in a mutual card form, but may be fixed in the lens barrel 121 in a form commonly used in the field of lens modules. The first lens 122 is away from the solar panel 11 with respect to the second lens 123, the first lens 122 and the second lens Each of the 123 includes an arcuate projection having an arcuate outer surface that protrudes away from the solar panel 11 and an arc that protrudes away from the solar panel 11 The inner surface, the arcuate projection of the second lens 123 includes an arcuate outer surface that protrudes toward the solar cell panel 11 and an arcuate inner surface that protrudes toward the solar cell panel 11.

The second spacer 125 is disposed between the second lens 123 and the light guide 126 for isolating the second lens 123 and the light guide 126, which may be an aperture or a spacer ring which is common in the art.

The light guide body 126 includes an incident surface 1261, an exit surface 1262 opposite to the incident surface 1261, and a side surface 1263 disposed between the incident surface 1261 and the exit surface 1262 and connected to the incident surface 1261 and the exit surface 1262. The entrance face 1261 is provided with a plurality of dots 1264. The dots 1264 can be circular, pyramidal, trapezoidal or prismatic. The dot 1264 is disposed such that the refractive index of the incident surface 1261 gradually increases from the center of the incident surface 1261 toward the edge thereof, so that the refractive index difference caused by the sunlight passing through the second lens 123 due to the shape of the second lens 123 To be compensated to the same value, the light exits the solar panel 11 with the same energy from the exit surface 1262, while avoiding differences in the photon density accepted across the surface of the solar panel 11. Of course, the concentrating module 12 may not include the light guide body 126 as long as it can collect sunlight.

The control module 20 is configured to control the solar panel 11 to convert the absorbed light energy into electrical energy and store the electrical energy in the energy storage module 30, which includes a DC-DC conversion module 21, a charging/discharging module 22, and a controller 23.

The input end of the DC-DC conversion module 21 is electrically connected to the first electrode layer 111 and the second electrode layer 113, and is configured to convert the voltage obtained by converting the solar panel into light energy according to the voltage of the charging/discharging module into a charging/discharging module. Voltage. The output of the DC-DC conversion module 21 is electrically connected to the charging/discharging module and the control module 23, which will be converted. The voltage is input to the charge/discharge module to facilitate charging or discharging of the energy storage module 30 by the latter.

The input end of the charging/discharging module 22 is electrically connected to the DC-DC conversion module 21, and the output end thereof is electrically connected to the controller 23 and the energy storage module 30. The charge/discharge module 22 is for charging or discharging the energy storage module 30 in accordance with a command from the controller 23.

The controller 23 is electrically connected to the output end of the DC-DC conversion module 21, the charging/discharging module 22, and the energy storage module 30, respectively, for controlling the DC-DC conversion module 21 and the charging/discharging module according to the power stored in the energy storage module 30. 22 open or close. Specifically, when the storage capacity of the energy storage module 30 is in a saturated state, the controller 23 turns off the DC-DC conversion module 21, once the storage capacity of the energy storage module 30 is non-saturated and there is sunlight illuminating the solar panel 11 The controller 23 activates the DC-DC conversion module 21 to control the charging/discharging module 22 to charge the energy storage module 30 until the storage capacity of the energy storage module 30 is saturated.

The energy storage module 30 is electrically connected to the controller 23 and the charging/discharging module 22, and transmits the state of the stored electricity of the energy storage module 30 to the controller 23, so that the controller 23 controls the DC-DC conversion module 21 according to the state of the stored electricity state. Open and close.

The solar power supply device 100 of the present embodiment is provided with a concentrating device 12 capable of collecting sunlight, so that not only sunlight directly irradiated to the solar panel 11 is converted into electric energy, but also sunlight transmitted to the concentrating device 12 can be transmitted. After the concentrating device 12 is irradiated to the solar panel 11 to be converted into electric energy, the photovoltaic efficiency is doubled and the cost is saved without increasing the number of solar panels.

The solar power supply device 100 of the embodiment can be applied to power supply in a plurality of fields, such as power supply for an illumination source, an electronic device, and a portable device. When the solar power supply device 100 provided in this embodiment is a power supply device, only the energy storage module 30 and the end thereof are required. The terminal can be directly electrically connected. Hereinafter, the illumination system 200 including the solar power supply device 100 provided by the embodiment of the present technical solution is illustrated by taking illumination as an example.

Referring to FIG. 3 , the lighting device 200 includes a solar power supply device 100 and a lighting module 150 . The illumination module 150 is connected to the energy storage module 30 of the solar power supply device 100. The opening and closing thereof can be controlled by the controller 23, or can be controlled by a separately provided switch (not shown), thereby causing the illumination module 150 to emit illumination light.

The illumination module 150 is an LED module including a metal layer 151, a semiconductor layer 152, and a light-emitting layer 153 which are sequentially stacked. The metal layer 151 is connected to the anode of the energy storage module 30, and the semiconductor layer 152 is connected to the cathode of the energy storage module 30. The semiconductor layer 152 has a three-layer structure including a P-type semiconductor layer 1521, an N-type semiconductor layer 1523, and a photon excitation layer 1522 between the P-type semiconductor layer 1521 and the N-type semiconductor layer 1523.

The material of the P-type semiconductor layer 1521 may be a P-type amorphous germanium material, especially a P-type hydrogen-containing amorphous germanium material, or a III-V compound or a II-VI compound, in particular, doped with aluminum, potassium, A semiconductor material of indium, such as aluminum aluminum nitride or aluminum gallium arsenide. Preferably, the material of the P-type semiconductor layer 1521 is a P-type amorphous germanium material.

Photon excitation layer 1522 is used to form an electron-hole pair to form a barrier electric field and convert it into photons.

The N-type semiconductor layer 1523 is electrically connected to the negative electrode of the energy storage module 30, and the material thereof may be an N-type amorphous germanium material, in particular, an N-type hydrogen-containing amorphous germanium material, or a III-V compound or a II-VI group. The compound, in particular, is a semiconductor material doped with nitrogen, phosphorus or arsenic, such as potassium nitride or indium gallium phosphide.

The light emitting layer 153 is formed on the N type semiconductor layer 1523, which forms an ohmic contact with the N type semiconductor layer 1523. The material of the light-emitting layer 153 is transparent metal oxide or metal doping Oxides such as indium tin oxide, aluminum oxide, zinc oxide, tin oxide, indium doped tin oxide, tin doped gallium oxide, tin doped silver indium oxide, indium tin oxide, zinc doped three Indium oxide oxide, antimony doped tin dioxide or aluminum doped zinc oxide.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

100‧‧‧Solar power supply unit

10‧‧‧Power Module

20‧‧‧Control module

30‧‧‧ Energy storage module

11‧‧‧Solar panels

12‧‧‧ concentrating device

111‧‧‧First electrode layer

112‧‧‧Semiconductor structural layer

113‧‧‧Second electrode layer

1111‧‧‧ first surface

1112‧‧‧ second surface

1121‧‧‧P type semiconductor structural layer

1123‧‧‧N type semiconductor structural layer

1122‧‧‧P-N layer

1131‧‧‧Transparent conductive layer

1132‧‧‧Metal conductive layer

121‧‧‧Mirror tube

122‧‧‧ first lens

123‧‧‧second lens

124‧‧‧First spacer

125‧‧‧Second spacer

126‧‧‧Light guide

1261‧‧‧Injection surface

1262‧‧‧Outlet

1264‧‧‧ outlets

21‧‧‧DC-DC converter module

22‧‧‧Charging/discharging module

23‧‧‧ Controller

Claims (9)

A solar power supply device includes a power generation module, a control module and an energy storage module. The control module is respectively connected to the power generation module and the energy storage module, and is configured to control the power generation module to convert the light energy into electrical energy and store the electrical energy in the energy storage module. The improvement is that the power generation module comprises a solar panel and a concentrating module, and the concentrating module comprises at least one lens module opposite to the solar panel for collecting sunlight to the solar panel, and each lens module comprises a lens barrel a first lens, a second lens, a first spacer, a second spacer, and a light guide disposed in the lens barrel along an optical axis. The first spacer is disposed between the first lens and the second lens. The first lens and the second lens are spherical lenses or aspherical lenses, and the second spacer is disposed between the second lens and the light guide. The solar power supply device of claim 1, wherein the first lens is away from the solar panel relative to the second lens, and the first lens and the second lens each include an arcuate protrusion. The arcuate projection of the first lens includes an arcuate outer surface that protrudes away from the solar panel and an arcuate inner surface that protrudes away from the solar panel, and the arcuate projection of the second lens A curved outer surface that protrudes toward the solar panel and an arcuate inner surface that protrudes toward the solar panel are included. The solar power supply device according to claim 1, wherein the light guide body comprises an incident surface and an exit surface opposite to the incident surface, and the exit surface is disposed opposite to the solar panel, and the incident surface is provided with a plurality of dots. The solar power supply device of claim 3, wherein the refractive index of the incident surface increases from a center of the incident surface to an edge thereof. The solar power supply device of claim 1, wherein the control module comprises a DC-DC conversion module, a charging/discharging module and a controller, and the DC-DC conversion module and the solar energy The battery board is connected to convert the energy voltage converted by the solar panel into a voltage required for the charging/discharging module, and the charging/discharging module is connected with the DC-DC conversion module, the controller and the energy storage module, and the controller and the DC- The DC conversion module, the charging/discharging module and the energy storage module are connected, and the DC-DC conversion module is controlled to be turned on or off according to the storage capacity of the energy storage module, thereby controlling the charging/discharging module to charge the energy storage module. The solar power supply device of claim 1, wherein the solar panel comprises a first electrode layer, a semiconductor structure layer, and a second electrode layer having a polarity opposite to that of the first electrode layer. The solar power supply device of claim 6, wherein the semiconductor structure layer comprises a P-type semiconductor structure layer, an N-type semiconductor structure layer, and a P-type semiconductor structure layer and an N-type layer which are sequentially stacked on the first electrode layer. A PN junction layer between semiconductor structural layers. A lighting system comprising a lighting module, wherein the lighting system further comprises a solar power supply device according to any one of claims 1 to 7, the lighting module being electrically connected to the energy storage module. The illumination system of claim 8, wherein the illumination module comprises a metal layer, a semiconductor layer and a light-emitting layer which are sequentially stacked, the energy storage module has a positive electrode and a negative electrode, and the metal layer and the semiconductor layer are respectively connected to the storage The positive and negative poles of the module.