JP2003168812A - Optically charging secondary battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optically charging secondary battery where a flexible photoelectric conversion sheet in which a photoelectric conversion element is formed and a storage battery are combined and charging efficiency is improved. <P>SOLUTION: The battery is provided with a cylindrical winding core 2; a sheet-like body 3 which is wound to the winding core, is arranged so that it can freely be pulled out, and has the flexible photoelectric conversion element; the storage battery that can be charged/discharged; and a control circuit 5 controlling the charging/discharging of the storage battery. The optical charging- type secondary battery 1 has a cylindrical shape as a whole in a state where the sheet-like body having the photoelectric conversion element is wound to the winding core. An upper flange 6 and a lower flange 7, which are positioned on the ends of the winding core and are formed in circular plate shapes, are integrally installed in the winding core. The sheet-like body is wound to the winding core part. A semi-cylindrical body 32 is connected to the end part of the sheet-like body. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photo-chargeable secondary battery configured to charge a storage battery with a photoelectric conversion element.

[0002]

2. Description of the Related Art A photoelectric conversion element is also called a solar cell and is an element for converting light energy such as sunlight into electric energy. When extracting electric energy from light energy, this photoelectric conversion element does not generate emissions such as carbon dioxide, unlike fossil fuels that have been conventionally used. Further, since the photoelectric conversion element can extract electric energy from light energy such as sunlight, which is said to be almost inexhaustible, it can generate power semipermanently. Therefore, in view of global environmental problems, it is considered that the photoelectric conversion element will be used in a wider range of applications and scales.

However, the photoelectric conversion element often has large temporal fluctuations in light energy such as sunlight, and as a result, electric energy generated by converting light energy also has large temporal fluctuations. Therefore, it is often not suitable to be used as a direct power source for electric equipment. Further, the photoelectric conversion element requires a large light receiving area in order to obtain a predetermined amount of electric power suitable for use because the light energy such as sunlight exists in a spatially dilute state. Therefore, the photoelectric conversion element is used as an auxiliary current for electric or electronic devices, or for the purpose of charging the storage battery once with the converted electric energy and discharging the storage battery for use.

On the other hand, due to the progress of various processing techniques in recent years,
The miniaturization of electrical or electronic equipment is progressing, and as a result,
Various electric or electronic devices are often regarded as portable devices. For this reason, dry batteries, which are convenient and easy to carry, are usually used as a power source for electric or electronic devices.

Therefore, an optically rechargeable secondary battery that combines the advantages of the photoelectric conversion element described above with the convenience of a dry battery is disclosed in, for example, Japanese Patent Laid-Open No. 63-314780 (battery).
And Japanese Patent Application Laid-Open No. 2-73675 (cylindrical rechargeable solar cell). Such a conventional photo-rechargeable secondary battery is a combination of a photoelectric conversion element as a power generation unit and a storage battery as a charging / discharging unit in a cylindrical standard battery type. It is possible to drive electronic devices with electric power produced by light energy.

[0006] However, in the conventional photo-chargeable secondary battery as described above, the photoelectric conversion element receives the light energy such as sunlight radiated from one direction by effectively utilizing the entire outer surface area of the storage battery. Not only is it difficult, but because of its structure, the light receiving area of the photoelectric conversion element cannot be provided beyond the outer surface area of the storage battery. Therefore, the conventional photo-chargeable secondary battery, charging time when charging the storage battery is too long to withstand practical use, and even the photoelectric conversion element may not be able to generate even the power required to charge the storage battery. There was a problem.

[0007] Therefore, as a result of intensive studies by the inventors of the present invention, light energy such as sunlight is usually used by combining a photoelectric conversion element having flexibility and a storage battery. Invented a photo-chargeable secondary battery that can be used as a power source for existing electric or electronic devices (Japanese Patent Application No. 10-351505). According to the present invention, the present inventors have realized a photo-chargeable secondary battery which has a practical charging performance and is easy to use as a power source of a commonly used electric or electronic device.

[0008]

However, the above-mentioned photo-chargeable secondary battery has the following problems when charging the storage battery.
The wound flexible photoelectric conversion element is stretched to increase the light receiving area for use. At this time, since the photoelectric conversion element has elasticity, it needs to be rolled up and fixed compactly, and also has plastic deformability. , It may curl in the winding direction. In this state, the light coming from a specific direction cannot be received on the entire surface of the photoelectric conversion element, and there is a problem that effective power generation and charging cannot be performed. Therefore, the present invention solves the above problems by providing a flexible photoelectric conversion sheet in which a photoelectric conversion element is formed and a storage battery, and provides a photo-chargeable secondary battery with improved charging efficiency. The purpose is to

[0009]

As a result of intensive studies to solve the above problems, the present inventors have succeeded in producing a photo-chargeable secondary battery described below. More specifically, the photo-chargeable secondary battery according to the present invention comprises a cylindrical core portion and a flexible photoelectric cell that is wound around the core portion and is arranged so as to be drawn out. A state in which a sheet-shaped body having a conversion element, a chargeable / dischargeable storage battery, and a control circuit unit for controlling charge / discharge of the storage battery are provided, and the sheet-shaped body having the photoelectric conversion element is wound around the winding core part. In the winding core portion, an upper flange and a lower flange, which are positioned at both ends of the winding core portion and are formed in a substantially circular flat plate shape, are integrally provided, and the winding core portion has the sheet shape. In a rechargeable secondary battery configured to wind a body, a semi-cylindrical body is connected to an end of the sheet-shaped body. Furthermore, in the light rechargeable secondary battery according to the present invention, the semi-cylindrical body has a shape that covers the substantially cylindrical shape in a state where the sheet-shaped body having the photoelectric conversion element is wound around the winding core portion. The photo-chargeable secondary battery covered with the semi-cylindrical body has a predetermined cylindrical battery standard shape and is arranged in parallel to the longitudinal direction of the sheet-like body having the photoelectric conversion element. A plurality of photoelectric conversion elements electrically connected in series are formed, the connection end to the winding core of the sheet-shaped body having the photoelectric conversion element,
From the inner end of the effective portion of the photoelectric conversion element, is present outside in the pull-out direction, the connection end of the semi-cylindrical body of the sheet-like body having the photoelectric conversion element, the effective portion of the photoelectric conversion element. It exists inside in the pull-out direction from the outer end. Furthermore, the discharge voltage of the storage battery is
The voltage is 0.6 to 1.9 V, the storage battery is detachable from the winding core portion, and the storage battery has a predetermined cylindrical battery standard shape.

Furthermore, according to the present invention, a sheet-like body having a cylindrical winding core portion and a flexible photoelectric conversion element wound around the winding core portion and arranged so as to be drawn out. , A chargeable / dischargeable storage battery, and a control circuit unit for controlling charge / discharge of the storage battery, and has a substantially cylindrical overall shape in a state in which the sheet-shaped body having the photoelectric conversion element is wound around the winding core, An upper flange and a lower flange, which are located at both ends of the winding core portion and are formed in a substantially circular flat plate shape, are integrally provided on the winding core portion, and the winding core portion is configured to wind the sheet-shaped body. Further, there is provided an electric or electronic device equipped with a light rechargeable secondary battery in which a semi-cylindrical body is connected to an end of the sheet-shaped body.

In the photo-chargeable secondary battery constructed as described above, when the storage battery is charged, the flexible photoelectric conversion element wound is stretched and wound repeatedly. At this time, in the photo-chargeable secondary battery according to the present invention, the photoelectric conversion element can be compactly rolled up and fixed. On the other hand, in the conventional photo-chargeable secondary battery, a so-called curl is formed along with the holding in a rolled-up state for a long time, and the curl is curled in the rolling-up direction, so that the photoelectric conversion element emits light over the entire surface during light charging. In some cases, the present invention can solve this problem, and effective power generation and charging can be achieved. In short, the present invention provides a photo-chargeable secondary battery that is highly convenient for users.

That is, according to the present invention, (1) a sheet shape having a cylindrical winding core portion and a flexible photoelectric conversion element wound around the winding core portion and arranged so as to be drawn out. A body, a chargeable / dischargeable storage battery, and a control circuit unit for controlling the charge / discharge of the storage battery, and a substantially cylindrical overall shape in a state in which the sheet-shaped body having the photoelectric conversion element is wound around the winding core. The upper core and the lower flange, which are formed in a substantially circular flat plate shape and are located at both ends thereof, are integrally provided on the winding core so that the sheet-shaped body is wound around the winding core. In the light rechargeable secondary battery configured, a light rechargeable secondary battery, characterized in that a semi-cylindrical body is connected to the end of the sheet-like body,
(2) The semi-cylindrical body covers the substantially cylindrical shape in a state in which the sheet-shaped body having the photoelectric conversion element is wound around the winding core, and the semicylindrical body covers the substantially cylindrical shape. (3) Photo-chargeable secondary battery, (3) The photo-chargeable secondary battery covered with the semi-cylindrical body has a predetermined cylindrical battery standard shape, and the photo-chargeable secondary battery according to (2) above. Secondary battery,
(4) A plurality of photoelectric conversion elements arranged in parallel to the longitudinal direction of the sheet-shaped body having the photoelectric conversion element and electrically connected in series are formed. And (5) a connecting end portion of the sheet-shaped body having the photoelectric conversion element to the winding core portion in an extraction direction from an inner end portion of the effective portion of the photoelectric conversion element. The photo-rechargeable secondary battery according to (1) above, which is externally provided, and (6) the connecting end portion of the semicylindrical body of the sheet-like body having the photoelectric conversion element is effective for the photoelectric conversion element. The rechargeable secondary battery according to (1) above, wherein the discharge voltage of the storage battery is 0.
6 to 1.9V, The rechargeable secondary battery according to (1), (8) The storage battery is detachable from the winding core, (1) The rechargeable secondary battery according to (1), (9) The storage battery has a shape of a predetermined cylindrical battery standard, (1)
(10) Cylindrical winding core part, and a sheet shape having a flexible photoelectric conversion element wound around the winding core part and arranged so as to be drawn out. A body, a chargeable / dischargeable storage battery, and a control circuit unit for controlling the charge / discharge of the storage battery, and a substantially cylindrical overall shape in a state in which the sheet-shaped body having the photoelectric conversion element is wound around the winding core. The upper core and the lower flange, which are formed in a substantially circular flat plate shape and are located at both ends thereof, are integrally provided on the winding core so that the sheet-shaped body is wound around the winding core. An electric or electronic device characterized in that a light rechargeable secondary battery in which a semi-cylindrical body is connected to an end portion of the sheet-like body is mounted,
(11) A sheet-shaped body having a cylindrical winding core portion, a flexible photoelectric conversion element wound around the winding core portion and arranged so as to be drawn out, and a rechargeable storage battery. , A control circuit unit for controlling charge / discharge of the storage battery, and has a substantially cylindrical overall shape in a state where the sheet-shaped body having the photoelectric conversion element is wound around the winding core, and the winding core has An upper flange and a lower flange, which are located at both ends and are each formed in a substantially circular flat plate shape, are integrally provided, and are configured to wind the sheet-shaped body around the winding core portion. The present invention relates to a method for manufacturing an electric or electronic device equipped with a light rechargeable secondary battery, characterized in that a light rechargeable secondary battery having a semi-cylindrical body connected to the end of is attached to the electric or electronic device.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, it goes without saying that the present invention is not limited to this. In the following, as a photo-chargeable secondary battery to which the present invention is applied, a photo-chargeable secondary battery 1 as shown in FIGS. 1 and 5 will be described. However, the photoelectric conversion element 11 of the photoelectric conversion sheet 3 in FIG. 1, FIG. 3 and FIG.
The starting point and the ending point of the photoelectric conversion element 11 are shown, and the middle part thereof is omitted.

The photo-chargeable secondary battery 1 according to the present invention comprises a cylindrical winding core portion 2 and a flexible photoelectric coil wound around the winding core portion 2 so as to be stretchable. Conversion sheet 3 and storage battery 4 provided inside winding core 2
And a control circuit unit 5. The light rechargeable secondary battery 1 is
As shown in FIGS. 1 and 2, when the photoelectric conversion sheet 3 is wound around the winding core portion 2, it has an overall cylindrical shape. Further, as shown in FIG. 1, the photo-chargeable secondary battery 1 charges the storage battery 4 by causing the photoelectric conversion sheet 3 to receive light in a state where the photoelectric conversion sheet 3 is extended from the winding core 2.

The winding core 2 is formed of a resin material in a cylindrical shape. Examples of the resin material include ABS
(Acrylonitrile-butadiene-styrene) resin, S
AN (styrene-acrylamide) resin, ASA (acrylonitrile-styrene-acrylamide) resin, AC
It is preferable to use S (acrylonitrile-chlorinated polyethylene-styrene) resin or AAS (acrylonitrile-acrylate-styrene) resin. The winding core portion 2 is formed to be slightly longer than the width around which the photoelectric conversion sheet 3 is wound. Therefore, the light rechargeable secondary battery 1
The winding core 2 can be wound over the entire width of the photoelectric conversion sheet 3.

The winding core 2 is provided with an upper flange 6 and a lower flange 7 at both ends thereof. The upper flange 6 and the lower flange 7 are formed of a material similar to that of the winding core 2 into a substantially circular flat plate shape, and are fixed to both ends of the winding core 2 by fixing means such as an adhesive. The upper flange 6 and the lower flange 7 may be formed integrally with the winding core 2. The upper flange 6 and the lower flange 7 are formed such that their diameters are substantially the same as or slightly larger than the diameter of the photoelectric conversion sheet 3 wound around the winding core 2. Thereby, the upper flange 6 and the lower flange 7 can protect the side edge portions of the photoelectric conversion sheet 3, and serve as guides for winding the stretched photoelectric conversion sheet 3 around the winding core 2. The photoelectric conversion sheet 3 can be wound around the winding core portion 2 without being displaced.

It is desirable that the winding core 2, the upper flange 6 and the lower flange 7 are made of a material exhibiting electrical insulation. Examples of materials exhibiting electrical insulation include, in addition to liquid crystal polymers, engineered plastics such as modified polyphenylene ether (PPE), polyether ether ketone (PEEK), and polyphenylene sulfide (which have chemical resistance, heat resistance and creep resistance). PP
S), polyether sulfone (PES) or polysulfone (PSF). As a result, in the photo-chargeable secondary battery 1, internal wiring or the like is short-circuited via these parts, or these parts are electrically short-circuited by coming into contact with, for example, a terminal of a battery housing part of an electric device. This can be prevented.

The winding core 2, the upper flange 6 and the lower flange 7 are preferably made of a material having excellent heat insulating properties. Examples of the material having excellent heat insulating properties include polyamide resins such as para-aramid resin and meta-aramid resin, vinyl chloride resin, polyester resin, polyethylene resin, polystyrene resin or polyurethane resin. As a result, when the photo-chargeable secondary battery 1 is exposed to a high temperature such as being left on a dashboard of an automobile, the temperature of the storage battery 4 housed therein may rise and be damaged. Can be prevented. For the same reason, it is desirable that the winding core portion 2, the upper flange 6, and the lower flange 7 are colored in a color that does not easily absorb light or heat, such as white.

In the upper flange 6 and the lower flange 7,
A positive electrode terminal 8 and a negative electrode terminal 9 are provided respectively.
The positive electrode terminal 8 and the negative electrode terminal 9 are made of a dielectric material, and are electrically connected to predetermined terminals of the control circuit section 5 by connecting means (not shown). Examples of such a material having dielectric properties include metals such as copper, iron and nickel, glass, quartz, ceramics, metal oxides such as magnesium oxide and aluminum oxide, and dielectric polymers such as liquid crystal polymers.

As shown in FIGS. 3 and 4, the photoelectric conversion sheet 3 has a sheet-like substrate 10 which is flexible and formed into a substantially rectangular sheet shape, and is arranged on the sheet-like substrate 10. It is composed of a plurality of photoelectric conversion elements 11. The sheet-shaped substrate 10 is formed of a material having electrical insulation such as polyester, and is formed in a sheet shape so as to have flexibility. Examples of such an electrically insulating material include polyester and synthetic resins such as polyamide and polyethylene. Each photoelectric conversion element 11 includes a first electrode layer 12, a photoelectric conversion layer 13, and a second electrode layer 1 on a sheet substrate 10.
4 and 4 are sequentially laminated in a thin film shape.
Each layer constituting the photoelectric conversion element 11 is formed by various PVD methods represented by, for example, a sputtering method or an evaporation method, or plasma C.
The thin film is formed on the sheet substrate 10 by various CVD methods represented by the VD method and the MOCVD method. The photoelectric conversion element 11 has sufficient flexibility like the sheet substrate 10 because each layer is formed in a thin film shape.

Further, the photoelectric conversion sheet 3 may have a flexible polymer laminated sheet. The polymer laminated sheet covers the light receiving portion of the photoelectric conversion element, and this portion preferably has at least light transmittance. The polymer laminated sheet preferably covers the entire surface of the photoelectric conversion sheet 3, and is further formed so as to project from the end portion of the photoelectric conversion sheet 3 and protect the end portion of the photoelectric conversion sheet 3. preferable. Further, the polymer laminated sheet is preferably provided on the light receiving surface side of the photoelectric conversion sheet 3, but it is more preferably provided on the back side of the light receiving surface of the photoelectric conversion sheet 3. Thereby, when the flexible photoelectric conversion element 11 is repeatedly stretched to increase the light receiving area and is used,
Damage or deterioration of the photoelectric conversion element 11 due to repeated bending of the photoelectric conversion element 11 can be reduced. further,
With respect to repeated sliding on the surface due to repeated stretching of the photoelectric conversion element 11, the photoelectric conversion element 11
However, it can be prevented from being damaged or deteriorated, and it is possible to prevent the power generation efficiency of the entire element from being lowered, and thus the charging performance from being lowered. In addition, the photoelectric conversion element 1
When 1 is in a wound state for a long period of time, the photoelectric conversion sheet 3 is plastically deformed (a state in which a so-called curl is formed), which prevents the photoelectric conversion element 11 from effectively receiving light. Due to the presence of the sheet, the plastic deformation can be reduced and effective light reception can be obtained. When the polymer laminated sheet is used for the front and back of the photoelectric conversion sheet 3 as described above, it may be made of the same sheet material on the front and back sides, or may be appropriately made of different sheet materials. As a material, at least a material that covers the light receiving portion of the photoelectric conversion element 11 is preferably a light transmissive material. Further, it is desirable to have abrasion resistance due to friction and weather resistance against light. As such a material, for example, a halogenated olefin, in particular, a fluorinated olefin polymer, or a copolymer of this and an olefin is exemplified. Further, an adhesive layer may be provided to fix these sheets to the photoelectric conversion sheet 3. Examples of the material for the adhesive layer include a copolymer of ethylene and vinyl acetate (E
VA) etc. are illustrated.

In the photoelectric conversion sheet 3, the photoelectric conversion elements 11 are electrically connected to each other in series,
A positive electrode terminal 12a and a negative electrode terminal 14a are formed on the electrode layers of the photoelectric conversion element 11 located at both ends in the lateral direction, respectively. The positive electrode terminal 12a and the negative electrode terminal 14a are electrically connected to predetermined terminals of the control circuit unit 5, respectively. Further, the photoelectric conversion element 11 is configured to receive light such as sunlight from the main surface 11a on the side opposite to the sheet-shaped substrate 10, that is, on the side facing inward. First electrode layer 1
The second and second electrode layers 14 are made of a dielectric material, and function as a pair of electrodes for the photoelectric conversion layer 13. The photoelectric conversion layer 13 has, for example, a-
An amorphous semiconductor thin film typified by a pin junction structure of Si is provided, and an electromotive force is generated by the incidence of light such as sunlight. The film has a so-called photoelectric conversion effect. ing. The photoelectric conversion layer 13 is
For example, a pn junction structure formed by a p-type organic semiconductor such as perylene and an n-type organic semiconductor such as copper phthalocyanine may be used. The photoelectric conversion layer 13 is not limited to the thin film structure described above, and may be formed in a film structure having sufficient flexibility and a photoelectric conversion effect.

The first electrode layer 12 is, for example, A
It is preferable that the photoelectric conversion layer 13 is formed of a metal material such as g, Al, Cr, Ni, or Cu so as to have a high reflectance with respect to the light to be received by the photoelectric conversion layer 13. Thereby, the light transmitted through the photoelectric conversion layer 13 can be reflected and incident on the photoelectric conversion layer 13 again, and the photoelectric conversion efficiency of the photoelectric conversion layer 13 can be improved. In addition, the second electrode layer 14
Is preferably formed as a so-called transparent electrode formed of a material containing a metal oxide such as SnO ₂ or In ₂ O ₃ as a main component. Thereby, the light to be received by the photoelectric conversion layer 13 can be efficiently transmitted, and the photoelectric conversion efficiency of the photoelectric conversion layer 13 can be improved.

3 and 4, the first electrode layer 12 and the second electrode layer 14 of the specific photoelectric conversion element 11 are different photoelectric conversion elements adjacent to the photoelectric conversion element 11, respectively. The second electrode layer 14 and the first electrode layer 12 of No. 11 are shown, and an example in which a plurality of photoelectric conversion elements 11 share each electrode layer is shown. This allows
In the photoelectric conversion sheet 3, adjacent photoelectric conversion elements 1
One of them is electrically connected in series. In this case, for example, the first electrode layer 12 and the second electrode layer 14 are formed of SnO ₂ or In ₂ O as described above.
Formed of a material containing a metal oxide such as ₃ as a main component,
A light reflection layer (not shown) formed of, for example, a metal material may be provided between the first electrode layer 12 and the sheet-shaped substrate 10. Thereby, each photoelectric conversion element 1
1 can receive a sufficient amount of light through the second electrode layer 14, and can improve the photoelectric conversion efficiency by the light reflecting layer. Further, in this case, the photoelectric conversion elements 11 are connected to each other by a line by an electrode having a length substantially equal to the length in the longitudinal direction.
Therefore, for example, as compared with the case where the photoelectric conversion elements 11 are connected to each other at a point by, for example, a lead wire or the like, it is possible to reduce the possibility that a connection failure such as a disconnection occurs.

Further, in the photoelectric conversion sheet 3, each photoelectric conversion element 11 is arranged in parallel with the longitudinal direction thereof. That is, the pair of electrode layers of each photoelectric conversion element 11 is arranged so as to be parallel to the longitudinal direction of the photoelectric conversion sheet 3. As a result, when the photoelectric rechargeable secondary battery is stretched to charge the storage battery, the light rechargeable secondary battery is insufficiently pulled out or a foreign substance is in the shadow, and a part of the photoelectric conversion element 11 does not emit light. Even when the photoelectric conversion sheet is shielded from the above, the decrease in the overall power generation efficiency of the photoelectric conversion sheet can be minimized.

Further, the photoelectric conversion sheet 3 includes the winding core 2
It is wound around and is arranged so that it can be stretched freely.
One side, which is the innermost peripheral side, is connected and fixed to the winding core 2. The positive electrode terminal 12a and the negative electrode terminal 14a described above are provided on the photoelectric conversion sheet 3 on one side on the innermost peripheral side. As shown in FIG. 1, the end portion of the photoelectric conversion element portion 11 of the photoelectric conversion sheet 3 is in a stretched state, and the winding core portion 2
It is preferable that light is shielded by the upper flange 6 and the lower flange 7 and the like existing at both ends thereof so as not to be shaded. Therefore, from one side, which is the innermost peripheral side of the photoelectric conversion sheet 3 connected and fixed to the winding core section 2, to the inner peripheral side end of the photoelectric conversion element section 11 of the photoelectric conversion sheet 3. The photoelectric conversion sheet 3 is not provided with the photoelectric conversion element portion 11, and the sheet portion 31 having the positive electrode terminal 12a and the negative electrode terminal 14a is interposed. Thereby, in the charging operation, it is possible to prevent the light from being blocked by the outer peripheral wall 51 of the photoelectric conversion element portion 11 due to insufficient extraction. Furthermore, the photoelectric conversion element portion 11 can be moved from the inner periphery having a high curvature to the outer peripheral side having a smaller curvature, and fatigue deterioration due to bending of the photoelectric conversion element portion 11 can be reduced. In addition, the sheet portion 31 not having the photoelectric conversion element 11 is flexible,
It can be made higher than that having a photoelectric conversion element, and the durability of connecting and fixing the photoelectric conversion sheet 3 to the winding core 2 can be improved. In this case, the sheet portion 31 not having the photoelectric conversion element 11 may be formed integrally with the photoelectric conversion sheet 3, but may be formed by connecting sheets of the same or different materials as needed. You can

Further, the photoelectric conversion sheet 3 can be arranged so that the light receiving surface thereof is inside when wound around the winding core 2. Thereby, in the photo-chargeable secondary battery 1, when the photoelectric conversion sheet 3 is wound around the winding core 2 and used for discharging, the light receiving surface of the photoelectric conversion sheet 3 is not exposed to the outside. It is possible to prevent the light receiving surface from being damaged or damaged. However, although the photoelectric conversion sheet 3 is arranged so as to be wound around the winding core portion 2 with its light receiving surface inside, it is not limited to such a configuration, and the light receiving direction is If different, the photoelectric conversion sheet 3 may be arranged so as to be wound around the winding core portion 2 with its light receiving surface facing outward.

In the present invention, the semi-cylindrical body 32 is connected to the outer end portion of the photoelectric conversion sheet 3 as shown in FIG. 1 or 2. As shown in FIG. 2, the semi-cylindrical body 32 can be fixed so that the photoelectric conversion sheet 3 is not unrolled when the photoelectric conversion sheet 3 is wound up. On the other hand, when the photoelectric conversion sheet 3 is stored in a wound state for a long period of time, a so-called curl may occur and curling may occur in the winding direction. In such a case, there is a possibility that the light coming from the specific direction cannot be received by the entire surface of the photoelectric conversion element 11. When the photoelectric conversion sheet 3 is horizontally expanded and charged by light, the semi-cylindrical body 32 is connected, thereby
As shown in FIG. 5, the weight of the semi-cylindrical body 32 can prevent the outer end portion of the photoelectric conversion sheet 3 from curling up due to the curl. On the other hand, the end portion of the winding core portion 2 of the photoelectric conversion sheet 3 depends on the weight of the winding core portion 2, upper flanges 6 and lower flanges 7 present at both ends thereof, and the storage battery 4 contained in the winding core portion 2, The curling of the curl can be suppressed. In this way, when the photoelectric conversion sheet 3 is developed in the horizontal direction and photocharged, it can be stably fixed. For this reason, the semi-cylindrical body 32 is preferably formed of a material having a relatively high density, for example, a metal such as copper, iron or stainless steel. Further, the shape may be a substantially semi-cylindrical shape, and is not limited to the special shape illustrated in the drawings, for example.

Further, in the present invention, as shown in FIG. 1, the semi-cylindrical body 32 shields the light so that the end of the photoelectric conversion element 11 of the photoelectric conversion sheet 3 is in a stretched state and does not become a shadow. Is preferred. For this reason, the photoelectric conversion element 3 is connected to the photoelectric conversion sheet 3 from the outermost peripheral side of the photoelectric conversion sheet 3 to which the semi-cylindrical body 32 is connected to the outer peripheral side end of the photoelectric conversion element 11 of the photoelectric conversion sheet 3. 11
The seat portion 33 which does not have is interposed. Thereby, in the charging operation, it is possible to prevent the semi-cylindrical body 32 from blocking light from the photoelectric conversion element 11 as described above.

The storage battery 4 is a secondary battery which is housed in the inner space of the winding core 2 and can be charged and discharged. Storage battery 4
Specifically, for example, a nickel-hydrogen secondary battery, a nickel-cadmium secondary battery, a nickel-zinc secondary battery, a zinc-silver oxide secondary battery, an iron-nickel secondary battery, and the like.
The storage battery 4 is preferably a nickel-hydrogen secondary battery. As a result, the storage battery 4 can improve the energy density per volume and does not use heavy metals such as lead and cadmium and has excellent environmental compatibility.

The storage battery 4 may be a standard dry battery having a predetermined battery standard shape. The storage battery 4 is, specifically,
R6 type battery called so-called AA type, R03 type battery called AA type, which is defined by IEC, JIS, etc.
It may be an R1 type battery called AA type, or an R44 type battery called R1220 type battery called a button type. As a result, the development and manufacturing costs of the photo-chargeable secondary battery 1 can be suppressed. However, from the viewpoint of the storage capacity, it is also preferable that the storage battery 4 does not use a standard storage battery, but directly encloses a storage battery component such as an electrolytic solution in the internal space of the winding core 2. This allows
In the storage battery 4, the storage battery constituent can be enclosed even in a space corresponding to the exterior part of the standard storage battery, and the storage capacity can be increased.

The storage battery 4 may be detachably attached to the winding core 2. Specifically, for example, a part of the lower flange 7 may be opened and closed, and the storage battery 4 may be inserted into and removed from the winding core 2 from this opening / closing portion. Alternatively, for example, in a state where the photoelectric conversion sheet 3 is stretched, a part of the core portion 2 exposed to the outside can be opened and closed, and the storage battery 4 can be attached to and detached from the core portion 2 from the opening / closing portion. May be. As a result, in the photo-chargeable secondary battery 1, only the storage battery 4 can be replaced even when the storage battery 4 has been repeatedly charged and discharged and has reached the end of its life. Therefore, the photo-chargeable secondary battery 1 does not need to be discarded together with the expired storage battery 4 in other parts having a longer life than the storage battery 4, which is desirable from the viewpoint of effective utilization of resources. Further, as a result, the photo-chargeable secondary battery 1 can be used as a charger for charging the storage battery 4. That is, the storage battery 4 is charged by the photo-chargeable secondary battery 1, the charged storage battery 4 is taken out from the photo-chargeable secondary battery 1, and the storage battery 4 is used as a power source for other electric or electronic equipment. You can also

Further, the storage battery 4 may be a standard storage battery as described above, and may be detachable from the winding core 2. In this way, by using the standard storage battery as the storage battery 4 in a detachable manner, the light rechargeable secondary battery 1
When replacing the storage battery 4, this replacement work can be performed easily and easily. Also in this case, as described above, the photo-chargeable secondary battery 1 may be used as a charger for charging the storage battery 4. As a result, the storage battery 4 having the standard storage battery shape can be detached from the light-chargeable secondary battery 1 and can be easily used for electric or electronic equipment that uses a normal standard battery as a power source.

Further, the discharge voltage of the storage battery 4 is about 0.6 to
It is preferably about 1.9V. As a result, when the light rechargeable secondary battery 1 is used for an electric or electronic device that uses a normal tubular standard battery as a power source, it is operated below the operating voltage of the electric or electronic device. It is possible to prevent the possibility that the electric power or the electronic device is damaged or that the allowable voltage is exceeded and the electric or electronic device is damaged.

The control circuit section 5 is arranged on the upper flange 6 or in the inner space of the winding core section 2. The control circuit unit 5 appropriately has a function selected from, for example, a rectifying function between the photoelectric conversion sheet 3 and the storage battery 4, an overcharge prevention function of the storage battery 4 by the photoelectric conversion sheet 3, an overdischarge prevention function of the storage battery 4, and the like. The control circuit unit 5 can be specifically configured by an electric circuit using a diode, an operational amplifier, or the like. Since it can be configured by a discharge prevention circuit, detailed description of the circuit configuration is omitted. Further, the control circuit unit 5 is
At least four terminals are provided, and the positive electrode terminal 12a and the negative electrode terminal 14a of the photoelectric conversion sheet 3 and the positive electrode terminal and the negative electrode terminal of the storage battery 4 are electrically connected to these terminals, respectively. Then, the control circuit unit 5 functions so that the storage battery 4 can be efficiently charged by the photoelectric conversion sheet 3 and discharged from the storage battery 4.

The light rechargeable secondary battery 1 is constructed as described above, and in the state where the photoelectric conversion sheet 3 is wound around the winding core portion 2, as shown in FIG. . In this state, the light rechargeable secondary battery 1 can be easily attached to and detached from the electric or electronic device as a power source for the electric or electronic device.

Further, in the photo-rechargeable secondary battery 1, the photoelectric conversion sheet 3 is wound around the winding core portion 2 and fixed by the semi-cylindrical body 32 so that each portion has a predetermined cylindrical battery standard shape. It is desirable to be able to set dimensions. The light rechargeable secondary battery 1 is, for example, an R20 type battery, a so-called A1 type battery, or an AA type battery defined by IEC, JIS, or the like.
It may be an R14 type battery called a type or an R6 type battery called an AA type. Accordingly, the light rechargeable secondary battery 1 can be easily used for an electric or electronic device designed to house and use a normal tubular standard battery. Therefore, in this case, the light rechargeable secondary battery 1 converts the light energy of sunlight into electric energy and stores it, and uses it as a power source for electric or electronic equipment that uses a cylindrical standard battery that is normally used. can do.

Further, in the photo-chargeable secondary battery 1, as shown in FIG. 5, the storage battery 4 is charged with the photoelectric conversion sheet 3 extended from the winding core 2. At this time, since the light rechargeable secondary battery 1 can direct the entire light receiving area of the photoelectric conversion sheet 3 in the light irradiation direction, the power generation of the photoelectric conversion sheet 3 can be improved. Therefore, in the photo-chargeable secondary battery 1, the charging time for charging the storage battery 4 can be sufficiently shortened in practical use.

The photo-chargeable secondary battery according to the present invention is
The storage battery 4 is not limited in shape, number, storage position, or the like. The storage battery 4 is, for example, a light charging type secondary battery 1
It may be provided in plural inside and supported and fixed by an elastic body such as a coil spring or a leaf spring so as not to be displaced.

The photo-chargeable secondary battery according to the present invention is
As described above, the photoelectric conversion sheet 3 is not limited to the configuration in which one side, which is the innermost peripheral side, is connected and fixed to the winding core 2. It may be detachable from the battery 1. As a result, the photo-chargeable secondary battery 1 can be used by replacing it with a normal photoelectric conversion sheet 3 when the photoelectric conversion sheet 3 is physically or electrically damaged. That is, the light rechargeable secondary battery according to the present invention may have a configuration in which the photoelectric conversion sheet 3 is electrically connected to the storage battery 4 at least during charging.

[0041]

As described above, the photo-chargeable secondary battery according to the present invention ensures that the photoelectric conversion element is securely wound and fixed, and that the photoelectric conversion element is extended to securely fix the photoelectric conversion element in the photo-charged state. As a result, effective power generation and charging can be achieved. Therefore, according to the light rechargeable secondary battery of the present invention, it becomes practical to use light energy such as sunlight as a power source for electric or electronic devices, and prevent environmental pollution due to generation of harmful emissions. In addition to being able to do so, it is possible to effectively use earth resources.

[Brief description of drawings]

FIG. 1A is a schematic view of a photo-chargeable secondary battery showing a state in which a photoelectric conversion sheet carrying a photoelectric conversion element is pulled out. It is the schematic which looked at (b) and (a) from the positive electrode terminal side.

FIG. 2 (a) is a schematic view of a photoelectric conversion sheet carrying a photoelectric conversion element in a wound state, as viewed from the positive electrode terminal side of a photo-chargeable secondary battery. (B) It is a cross-sectional schematic diagram of a photo-chargeable secondary battery showing a state in which a photoelectric conversion sheet carrying a photoelectric conversion element is wound.

FIG. 3 is a schematic view of a photoelectric conversion sheet in a state of being stretched from a winding core portion.

FIG. 4 is a cross-sectional view taken along the line A-A ′ of FIG.

FIG. 5 is a schematic view showing a state in which a photoelectric conversion sheet is stretched in a horizontal direction, as seen from the positive electrode terminal side of a photo-chargeable secondary battery.

[Explanation of symbols]

1 Light rechargeable secondary battery 2 winding core 3 photoelectric conversion sheet 4 storage battery 5 Control circuit section 6 Upper flange 7 Lower flange 8 Positive terminal 9 Negative electrode terminal 10 sheet substrate 11 Photoelectric conversion element 11a main surface 12 electrode layers 12a positive electrode terminal 13 Photoelectric conversion layer 14 electrode layers 14a Negative electrode terminal 31 Seat 32 half cylinder 33 Seat

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroshi Miyazawa             6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Soni             -Inside the corporation (72) Inventor Tomiichi Watanabe             6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Soni             -Inside the corporation F term (reference) 5F051 AA05 AA11 BA15 BA18 CA12                       CA13 CA15 DA03 DA04 FA03                       FA04 GA05 JA17 KA03 KA08                 5H030 AS20 BB07 DD01 DD05

Claims (11)

[Claims] 1. A sheet-like body having a cylindrical winding core portion and a flexible photoelectric conversion element wound around the winding core portion so as to be drawn out, and chargeable and dischargeable. A storage battery and a control circuit unit for controlling charging / discharging of the storage battery are provided, and the sheet-shaped body having the photoelectric conversion element is wound around the winding core to have an overall cylindrical shape, and to the winding core. , A light charging type in which an upper flange and a lower flange, which are respectively located at both ends thereof and are formed in a substantially circular flat plate shape, are integrally provided and are configured to wind the sheet-shaped body around the winding core portion. In the rechargeable battery, a semi-cylindrical body is connected to an end of the sheet-like body, which is a light rechargeable rechargeable battery. 2. The semi-cylindrical body covers the substantially cylindrical shape in a state in which the sheet-shaped body having the photoelectric conversion element is wound around the winding core portion. Light rechargeable secondary battery. 3. The photo-chargeable secondary battery according to claim 2, wherein the photo-chargeable secondary battery covered with the semi-cylindrical body has a predetermined cylindrical battery standard shape. 4. A sheet-shaped body having the photoelectric conversion element, wherein a plurality of photoelectric conversion elements arranged in parallel to the longitudinal direction and electrically connected in series are formed. Item 2. A photo-chargeable secondary battery according to item 1. 5. A connection end portion of the sheet-shaped body having the photoelectric conversion element to the winding core portion is outside the inner end portion of the effective portion of the photoelectric conversion element in the pull-out direction. The photo-chargeable secondary battery according to claim 1. 6. The connecting end of the semicylindrical body of the sheet-like body having the photoelectric conversion element is present inside the outer end of the effective portion of the photoelectric conversion element in the pull-out direction. Item 2. A photo-chargeable secondary battery according to item 1. 7. The discharge voltage of the storage battery is 0.6-1.
The photo-chargeable secondary battery according to claim 1, which is 9 V. 8. The photo-chargeable secondary battery according to claim 1, wherein the storage battery is detachable from the winding core portion. 9. The photo-chargeable secondary battery according to claim 1, wherein the storage battery has a predetermined cylindrical battery standard shape. 10. A sheet-like body having a cylindrical winding core portion and a flexible photoelectric conversion element wound around the winding core portion and arranged so as to be drawn out, and chargeable / dischargeable A storage battery and a control circuit unit for controlling charging / discharging of the storage battery are provided, and the sheet-shaped body having the photoelectric conversion element is wound around the winding core to have an overall cylindrical shape, and to the winding core. An upper flange and a lower flange, which are located at both ends thereof and are formed in a substantially circular flat plate shape, are integrally provided, and are configured to wind the sheet-shaped body around the winding core portion, An electric or electronic device comprising a light rechargeable secondary battery, in which a semi-cylindrical body is connected to an end of a body. 11. A sheet-like body having a cylindrical winding core portion and a flexible photoelectric conversion element wound around the winding core portion so as to be drawn out, and chargeable / dischargeable. A storage battery and a control circuit unit for controlling charging / discharging of the storage battery are provided, and the sheet-shaped body having the photoelectric conversion element is wound around the winding core to have an overall cylindrical shape, and to the winding core. An upper flange and a lower flange, which are located at both ends thereof and are formed in a substantially circular flat plate shape, are integrally provided, and are configured to wind the sheet-shaped body around the winding core portion, A method of manufacturing an electric or electronic device equipped with a light rechargeable secondary battery, which comprises mounting a light rechargeable secondary battery, in which a semi-cylindrical body is connected to an end of a strip, on an electric or electronic device.