JPS61104567A - Power source apparatus using solar cell - Google Patents

Abstract

PURPOSE:To obtain a power source apparatus of energy-storing type, in which photo-energy is stored up electro-chemically and enabled to be taken out when needed, by layer-building and integrating thin-film storage batteries using thin- film solar cell and solid electrolyte. CONSTITUTION:On a metal plate 1 is formed a thin-film storage battery 2 serving as a means of storing up energy, on which an amorphous silicon (a-Si) solar cell 3 is formed, and being followed thereon by a transparent electroconductive film 4 such as ITO or SnO2, and a lattice-shaped electrode 6 serving as one of collectors. Another collector 5 is mounted on a part of the storage battery 2. photovoltaic power produced by light 7 incident from the side of the lattice-shaped electrode 6 is consumed in the external circuit being connected between the collector 5 making contact with a layered positive polar active material which serves as an electrode on P layer side of a-Si solar cell 3, and the metal electrode 6, but otherwise the thin-film storage battery 2 is charged. Similarly electrical energy stored up in the thin-film storage bat tery 2 can be consumed in the external circuit being connected between the collector 5 and metal electrode 6.

Description

[Detailed description of the invention] [Technical field to which the invention pertains]

The present invention relates to an energy storage type solar cell power supply device comprising a solar cell and storage means for storing electrical energy converted from solar energy by the solar cell.

[Prior art and its problems]

Solar cells are attracting attention as a means of utilizing solar energy as electrical energy, but power supplies using solar cells have the disadvantage that they cannot be used with temporary large power loads or when no light is incident on the solar cells. . To counter this, solar panels are usually combined with lead batteries or Mosokel cadmium batteries. However, in this case, the arrangement and construction for the combination of the solar cell and the energy storage means is troublesome, and the device becomes complex, especially in the case of large capacity.

[Purpose of the invention]

An object of the present invention is to eliminate these drawbacks and provide a simple solar cell power supply device that can electrochemically store solar energy and extract it as needed.

[Key points of the invention]

The solar cell power supply device according to the present invention comprises a solar cell section consisting of a semiconductor layer that generates carriers by light irradiation and an electrode layer that collects carriers generated in the semiconductor layer, a solid electrolyte layer that has conductivity due to ions, and the solid electrolyte layer that has conductivity due to ions. A secondary battery section consisting of an active material layer that has the function of transferring ions to and from an electrolyte layer is laminated, and both electrode layers of the solar cell section are electrically connected to the active material layer of the same polarity of the secondary battery section. The above objectives are achieved by being connected to the

[Embodiments of the invention]

FIG. 1 shows a sectional view of an embodiment of the invention, and FIG. 2 shows a plan view thereof. A tm* storage battery 2, which is an energy storage means, is formed on a metal substrate 1, an amorphous silicon (hereinafter referred to as a-3i) solar cell 3 is formed on it, and then a transparent conductive material such as ITOl or SnO* is formed. A membrane 4 and a grid electrode 6 are attached to serve as a current collecting electrode, and the other counter electrode 5 is attached to a part above the storage battery 2. The thin film storage battery 2 has, for example, 1. negative electrode active material like i, Ag
l, TiS, or other cathode active materials such as LII,
EyesN, Lis, asl. ,,. It consists of a solid electrolyte layer such as pH, 404 or t, +, o-tt, o. The negative electrode active material layer is formed using a vacuum evaporation method, and a solid electrolyte layer is formed thereon using a vacuum evaporation method and reduced pressure C.
VI') method, plasma CVD method, high frequency sputtering method, etc., and then the positive electrode active material layer is formed by vacuum evaporation method, low pressure CVD method, plasma CVD method, etc. The a-5t solar cell 3 has 9 layers, 1 layer, n
It consists of a-3i layers laminated in the order of layers. With this configuration, the photovoltaic force generated by the light 7 incident from the grid electrode 6 side is
It is consumed by an external circuit connected to the current collecting electrode 5 and the metal electrode 6 which are in contact with the positive electrode active material layer which also serves as a layer-side electrode, or if it is not consumed, the m-membrane storage battery 2 is charged. The electrical energy stored in the thin film storage battery 2 can also be consumed by an external circuit connected to the current collecting electrode 5 and the metal electrode 6 in the same manner as above. FIG. 3 shows a second embodiment of the present invention in which storage type solar cell units are connected in series. In this embodiment, a plurality of regions of transparent electrodes 4 made of ITO, 5nO1, etc. are formed on a glass substrate 8, and a-3L solar cells 3 are respectively formed on the transparent electrodes 4.
Then, the metal electrode 9 is applied so as to overlap the transparent electrode 4 of the adjacent unit, thereby constructing a series-connected solar cell on the glass substrate 8. A thin film storage battery 2 is provided on each solar cell unit, and a metal electrode 10 is placed on top of the thin film storage battery 2.
Attach. At this time, the metal electrode 10 is partially connected to the electrode 9.
light 7 passing through the glass substrate 8.
The photovoltaic force generated in the a-5i solar cell 3 or each thin-film storage battery is charged by the incidence of the a-5i solar cell 3, and the electric power can be taken out from the ends of the electrode 9 and the electrode IO. This results in storage type a-St solar cells connected in series. The number of units connected in series can be selected arbitrarily depending on the purpose of use.
, a solar cell power supply device with a predetermined output voltage can be obtained. In this case, if the a-31 layer of the a, -S+ solar cell 3 is formed in the order of p, i, and n from the side of the transparent electrode 4, the thin film storage battery is also formed with the metal electrode 9 as in the case of FIG. A negative electrode active material layer, a solid electrolyte layer, and a positive electrode active material layer are stacked in this order from the side. FIG. 4 shows a third embodiment of the invention. Construct thin film solar cells connected in series on a glass substrate 8 (similar to the second embodiment, but in the figure, an insulating film 11 such as 5SOX is formed on three solar cell units). is formed by a CVD method, etc., and a metal electrode 12 is formed thereon.This is overlapped at the end and connected to the metal electrode 9 of the solar cell unit 1 located at the right end.Subsequently, the thin film storage battery 2 is formed. They are laminated continuously over the entire surface, and a metal electrode 10 is attached thereon.In this example, a secondary battery is connected in parallel to three solar cells connected in series and one 111W battery.1. The charging voltage is three times the voltage generated by the solar cell. Therefore, the number of connected solar cell units can be selected depending on the charging characteristics of the secondary battery. [Effects of the Invention] According to the present invention, the thin film By integrating a solar cell and a thin film storage battery using a solid electrolyte, an energy storage type solar cell power supply device is constructed, in which light energy is electrochemically stored and can be taken out when needed.
You can easily get it without the hassle of connection. Fat again! The number of units of batteries or storage batteries can be selected and combined as desired1, making it possible to improve efficiency or make them more compact.

[Brief explanation of drawings]

FIG. 1 is a sectional view of one embodiment of the present invention, FIG. 2 is a plan view of the embodiment of FIG. 1, FIG. 3 is a sectional view of another embodiment, and FIG. 4 is a sectional view of yet another embodiment. It is a diagram. 1: Metal substrate, 2: Thin film storage battery, 3: a-3i solar cell, 4: Transparent electrode, 5: Current collecting electrode, 6,9°10,12
F metal electrode, 8-inch glass substrate. 6 Plans and Temperatures Figure 2

Claims (1)

[Claims] 1) A solar cell part consisting of a semiconductor layer that generates carriers by light irradiation and an electrode layer that collects carriers generated in the semiconductor layer, a solid electrolyte layer that has conductivity due to ions, and ions that are directed to the solid electrolyte layer. A secondary battery section consisting of an active material layer having a function of transmitting and receiving is laminated, and both electrode layers of the solar cell section are electrically connected to active material layers of the same polarity of the secondary battery section. Features of solar battery power supply device.