JP5790800B2 - Portable solar power generator - Google Patents

Description

  The present invention relates to a portable solar power generation device that can be easily deployed and stored, has excellent portability, and is suitably used in the outdoors without a power source.

  Conventionally, as this type of portable solar power generation device, a flexible solar power generation sheet and a roller for winding the solar power generation sheet are incorporated, and the solar power generation sheet is wound around the roller and pulled out. Various devices including a storage case that can be stored have been proposed (see, for example, Patent Documents 1 to 3). However, since the solar power generation sheet to be pulled out is usually an amorphous solar cell, there is a problem in that power generation efficiency is poor and sufficient generated power cannot be obtained unless sunlight is efficiently irradiated, and it is not practically used. There was a problem.

JP 2006-86203 A Japanese Patent Laid-Open No. 01-110777 Japanese Utility Model Publication No. 63-98668

  Therefore, in view of the above situation, the present invention intends to solve the problem of a stable and efficient power generation state with good workability in a portable solar power generation device made of a flexible solar power generation sheet. The object is to provide a solar power generation device that can be produced, is easy to use and has practicality.

In order to solve the above-described problems, the present invention incorporates a flexible photovoltaic power generation sheet and a roller for winding the photovoltaic power generation sheet, and the solar power generation sheet can be wound around the roller and pulled out. A positive case brush and a negative side brush connected to the output line of the photovoltaic sheet at different positions in the axial direction on the inner peripheral surface side of the roller, respectively, On the outer peripheral surface of the rotation support shaft extending inside the roller, a positive electrode cylinder and a negative electrode cylinder that are in sliding contact with each brush are provided in an insulated state from each other. A portable solar power generation device having a structure for taking out generated power is constructed (claim 1 ).

The present invention includes a photovoltaic sheet having flexibility, a built-in roller for winding the photovoltaic sheet, winding the photovoltaic sheet in the roller, and a storage case for withdrawable accommodated The photovoltaic sheet has a structure having plus / minus output electrodes on the leading end side and the proximal end side of the sheet, and an output electrode and a roller on the sheet leading end side along the side end portion of the photovoltaic sheet. Portable solar power generation, in which the lead wire connecting the brush on the inner peripheral surface side is attached to be sewn by alternately inserting the front and back through a plurality of through holes formed along the side edge of the solar power generation sheet The apparatus was configured (claim 2 ).

According to the invention according to claim 1 of the present application, by using such an electrode structure using a brush, it is possible to take out generated power without twisting wiring such as lead wires, and it is possible to improve durability. In addition, since the electrode (electrode cylinder) is built in the roller, the electrode portion can be waterproofed.

According to the invention according to claim 2 of the present application, it is possible to fix the lead wire with a tape, but the solar cell is not appropriate in the case of a material having poor adhesion such as a fluorine resin, With the configuration of the present invention, a wiring structure without slack can be realized.

The perspective view which shows the structure of the solar power generation unit of the portable solar power generation device which concerns on 1st Embodiment of this invention. The top view which shows the state which similarly pulled out the photovoltaic power generation sheet of the photovoltaic power generation unit. Similarly the front view of a photovoltaic power generation unit. The side view of a photovoltaic power generation unit. Explanatory drawing which shows the use condition which similarly pulled out the photovoltaic power generation sheet from the photovoltaic power generation unit, and was hold | maintained with the sheet | seat support means. (A), (b) is explanatory drawing which shows the roller unit similarly incorporated in a solar power generation unit. Sectional drawing which similarly shows the structure of a roller unit. The fragmentary sectional view which shows the principal part of a roller unit similarly. The side view which similarly shows a roller unit. Explanatory drawing which shows the portable solar power generation device which concerns on 2nd Embodiment of this invention. The top view which shows the principal part of a sheet | seat support means similarly. Explanatory drawing which similarly shows the accommodation state of a sheet | seat support means. Explanatory drawing which shows the portable solar power generation device which concerns on 3rd Embodiment of this invention. (A), (b) is explanatory drawing which shows the portable solar power generation device which concerns on 4th Embodiment of this invention.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing a photovoltaic power generation unit U excluding the sheet supporting means of the portable photovoltaic power generator 1 according to the present invention, and FIGS. 1 to 9 are the first embodiment of the present invention, FIGS. 12 shows a second embodiment, FIG. 13 shows a third embodiment, and FIG. 14 shows a fourth embodiment. In the figure, reference numeral 2 denotes a photovoltaic power generation sheet, 3 denotes a roller, and 4 denotes a storage case.

  As shown in FIGS. 1 to 4, the portable solar power generation device 1 of the present invention incorporates a flexible solar power generation sheet 2 and a roller 3 that winds the solar power generation sheet 2. A photovoltaic power generation unit U comprising a storage case 4 that winds the power generation sheet 2 around a roller 3 and accommodates it so as to be pulled out is configured. Further, as shown in FIG. 5, the photovoltaic power generation sheet pulled out from the storage case 4 The sheet support means 5 is provided for supporting the sheet 2 and holding it in a posture extended obliquely upward.

  Such a portable solar power generation device 1 can be widely used for other power sources such as outdoor activities such as construction sites and camping sites without power supply facilities and power supply to trailer houses, and can be easily assembled / stored. For example, in the case of construction, it can be easily used when moving to the next place after the construction is completed. In addition, since the sheet support means 5 is provided, the drawn-out photovoltaic power generation sheet can be held in an obliquely upward state, and the height to be held according to the season (the height of the sun), that is, the extension of the solar power generation sheet. The angle can be easily changed, and the solar battery can be installed so as to irradiate the battery surface as vertically as possible.

  The solar power generation sheet 2 can be suitably used as a film-type amorphous solar cell 20, and is affixed to the upper surface of a base sheet made of synthetic resin or synthetic rubber having a slightly larger dimension than the solar cell 20. It may be used directly. In this example, as shown in FIG. 2, a solar cell 20 using a base sheet made of a fluororesin is used as it is. Since the solar cell 20 of this example has a structure having plus / minus output electrodes on the leading end side and the base end side in the pull-out direction, the solar cell of the side end portion 2c of the solar power generation sheet 2 (solar cell 20). Wiring is attached along the nonexistent part.

  This wiring can also have a structure in which a copper foil tape is applied. However, there is a concern that the copper foil may be disconnected due to repeated winding / drawing of the photovoltaic power generation sheet 2. Therefore, in this example, a lead wire 21 that connects the output electrode on the front end side of the sheet and the brush on the inner peripheral surface side of the roller is provided along the side end portion 2c. The lead wire 21 can be fixed by affixing with a tape, but the solar cell 20 is not applicable to a material with poor adhesion such as a fluorine resin as in this example. In this example, a plurality of through holes 20b that are slightly larger than the lead wires 21 are formed at predetermined intervals along the side end portion 2c, and the lead wires 21 are alternately inserted into the front and back surfaces and attached so as to sew. A wiring structure is realized.

  If the photovoltaic sheet 2 does not receive sunlight on the entire surface of the solar cell 20, the efficiency is greatly reduced. For this reason, at least the solar cell 20 needs to be sufficiently pulled out of the storage case 4. Therefore, in this example, the synthetic resin sheet material 22 having flexibility and substantially the same width is connected to the base end side of the film-type amorphous solar cell 20, thereby enabling the solar cell 20 part to be sufficiently drawn out. Even after the drawing, the synthetic resin sheet material 22 is in a state in which at least one turn or more is wound around the roller 3 in the storage case 4 to maintain the holding strength on the sheet base end side when extended.

  Since the synthetic resin sheet material 22 cannot be smoothly wound up unless there is an elastic stress equal to or higher than that of the sheet of the solar cell 20, a fluorine-based resin sheet is also used. For joining the fluororesin sheets having poor adhesiveness, an all-over bonding technique for heating aluminum foil with ultrasonic waves was used. Further, a stop label for preventing excessive drawing is attached to an appropriate portion of the synthetic resin sheet material 22.

  A locking rod 60 having a gripping portion 61 in the center as a locking member 6 is fixed to the leading edge of the photovoltaic power generation sheet 2 along the edge. The left and right ends 60a are held on the outside of the case so as not to enter the storage case 4 by engaging the left and right case front surfaces 41 outside the drawer port 40 of the storage case 4. The photovoltaic power generation sheet 2 can be pulled out.

  The storage case 4 is provided with a drawer port 40 having a predetermined angle range from a position at which the photovoltaic power generation sheet 2 is pulled out in the horizontal direction to a position at which the photovoltaic sheet 2 is pulled obliquely upward at a predetermined angle on the front side, and corresponds to a position in which the drawer is pulled out in the horizontal direction. A lid 42 that closes the upper opening region R2 except for the opening region R1 with a predetermined vertical width is provided on the upper side via a hinge 43 so as to be opened and closed. As a result, in the housed state, the lid 42 closes the opening to prevent dust and foreign matter from entering and protect the photovoltaic power generation sheet 2 inside. It is possible to pull out the power generation sheet 2 and hold it in a posture extended obliquely upward by the sheet support means 5.

  As shown in FIG. 3, a roller 3 that winds the photovoltaic power generation sheet 2 is rotatably supported by the rotation support shaft 7 (left and right rotation support shafts 71 and 72) inside the storage case 4. More specifically, substantially L-shaped support members 70 are provided at the left and right ends of the case bottom plate, and the rotation support shafts 71 and 72 are supported by the support member 70 so as not to rotate. A roller unit A is fixed. A coil spring 8 is interposed between the roller 3 and the rotation support shaft 7 for rewinding the photovoltaic power generation sheet 2 drawn out of the case by the rotation of the roller 3 to the roller 3 with an elastic restoring force.

  As shown in FIG. 6B, the roller 3 includes a cylindrical member 30 made of an extruded aluminum material having a cross-sectional structure in which protrusions 30 a and 30 b for engaging or screwing project on the inside, and the cylindrical member 30. Support members 31, 32 with flanges 31a, 32a fixed to both ends of the screw holes of the protrusions 30a, 30b with attachment screws 31b, 32b so as to close both ends and functioning as bearings for the rotation support shaft 7, and the cylinder An end bracket 33 is provided which is engaged with an intermediate position on the inner side of the shaped member 30 so as to be movable in the axial direction and rotates together with the tubular member 30 and to which one end side of the coil spring 8 is fixed.

  The rotation support shaft 72 extends inside the roller. As shown in FIG. 7, a cylindrical shaft body 74 having a larger diameter is mounted on the outer peripheral surface of the rotation support shaft 72 via a cylindrical spacer 73. The coil spring 8 and the end bracket 33 are mounted on the outer peripheral surface of the shaft body 74. The coil spring 8 has a hook-shaped end portion 81 on one end side locked to the end bracket 33 so as not to rotate, and the end bracket 33 can rotate and move in the axial direction on the outer peripheral surface of the shaft body 74. Has been. The end bracket 33 has a groove 33a formed on the outer peripheral surface thereof, and moves relative to the roller 3 in the axial direction in a state in which the protrusion 30a inside the roller cylindrical member 30 is engaged with the groove 33a. It is possible. The end bracket 33 functions as a bearing portion that rotatably supports the roller 3 with respect to the rotation support shaft 7 at an intermediate position.

  On the other end side of the coil spring 8, the hook-shaped end portion 82 is engaged with the communication holes 72 a and 74 a of the rotation support shaft 72 and the shaft body 74, so that the coil spring 8 cannot rotate with respect to the rotation support shaft 7. Even if the coil spring 8 is twisted during winding and pulling, the axial movement of the roller 3 against the rotation support shaft 7 is absorbed by the relative movement of the end bracket 33 in the axial direction, so that the roller 3 It is set as the structure which can avoid beforehand that the force to an excessive horizontal direction acts on the photovoltaic sheet 2 by moving to a direction. It is also preferable to provide a ratchet mechanism so that the roller 3 is not unwound freely, and when rewinding, the lever 3 is freed to rewind. Such a ratchet mechanism can employ a known structure such as a roll screen.

  As shown in FIG. 8, the power generation power of the photovoltaic power generation sheet 2 is led into the roller 3 through lead holes 21 and 23 extending from the base end side of the sheet through the through holes 30 c of the roller cylindrical member 30. 3 is connected to a plus-side brush 90 and a minus-side brush 91 that are provided at different positions in the axial direction on the inner peripheral surface side. The brushes 90 and 91 rotate together with the roller 3, and on the outer peripheral surface of the rotation support shaft 71 extending inside the roller 3, the plus side electrode cylinder 92 and the minus side are in sliding contact with the brushes 90 and 91. The electrode cylinders 93 are provided so as to be insulated from each other, and are taken out from the roller units A through the internal wirings 94 and 95 of the rotation support shaft 71 from the electrode cylinders 92 and 93.

  More specifically, the positive side electrode cylinder 92 and the negative side electrode cylinder 93 are attached to the outer circumferential surface extending inside the roller of the hollow rotation support shaft 71 via the insulating member 96 at positions spaced apart from each other in the axial direction. Support pieces 97 and 98 project from the roller support member 32 rotating on the rotation support shaft 71 toward the inside in the axial direction, and the plus side electrode cylinder 92 and the minus side electrode cylinder 93 of each of the support pieces 97 and 98 are provided. The brushes 90 and 91 are provided at the corresponding positions in a state where they are urged toward the center, and slide while being urged by the corresponding electrode cylinders 92 and 93, respectively. By adopting such an electrode structure using a brush, it is possible to take out the generated power without twisting the wiring such as the lead wire, it is possible to enhance the durability, and the electrode is built in the roller 3. As a result, the electrode part can be waterproofed. If the electrode connection is complicated, it is not easy to replace the roller unit A. In this example, the wiring from the roller unit A is connected to a connector (not shown), and the roller unit A in the storage case can be easily replaced. It is.

  As shown in FIG. 5, the sheet support means 5 holds the strut 50 in an upright state, and an extendable strut 50 having an engaging portion 50 a that engages the front end of the photovoltaic power generation sheet 2 on the front end side. It is comprised from the holding member 51, and the up-down angle of the photovoltaic power generation sheet | seat 2 is adjusted by expansion / contraction of this support | pillar 50. As shown in FIG. That is, when using this apparatus, in order to make the solar power generation sheet 2 receive light efficiently and vertically, the lid 42 on the storage case 4 side of the solar power generation unit U is opened, and the solar power generation sheet 2 is tilted. The tip portion is pulled out to be fixed to the engaging portion 50 a of the support column 50, and is held in the obliquely extended state.

  The sheet support means 5 of this example is an example using a projection screen stand or the like, and further, the winter position, the spring and autumn positions, and the summer position are marked, and the height of the support 50 is changed according to the season. Thus, it is preferable that the extension angle of the photovoltaic power generation sheet 2 can be adjusted. In the case of such a sheet support means 5, if the unwinding force of the sheet is strong, a large leg portion is necessary so that the column 50 does not fall down, so a ratchet type brake mechanism is provided on the roller 3 of the photovoltaic power generation sheet 2. It is preferable.

  As shown in FIG. 5, the solar power generation unit U is connected to a power storage device S that incorporates a battery for storing the power generated by the solar power generation sheet 2. Specifically, the storage case 4 of the photovoltaic power generation unit U is provided with an output terminal for connection to an external power storage device S. The built-in battery of the power storage device S is preferably a lead battery that has a charge / discharge curve that is linear compared to other secondary batteries, is easy to perform charge / discharge control, is inexpensive, and has high safety. The power storage device S is further provided with a current limiting circuit, which limits the battery charging current to prevent battery deterioration due to overcharging. In addition, a power output unit capable of supplying AC100V, DC5V / 12V is provided. Furthermore, if an external battery can be connected, it is convenient for nighttime use.

  It is also a preferred embodiment to provide the storage case 4 with connecting terminals for connecting a plurality of photovoltaic power generation units U in parallel. When configured to be connectable in this way, the photovoltaic power generation unit U can be easily added, and the amount of generated power to one power storage device S can be easily increased.

  Next, a second embodiment of the present invention will be described based on FIGS.

  In the present embodiment, the holding member 51 of the column 50 in the sheet support means 5 that holds the posture of the photovoltaic power generation sheet 2 includes the leg member 52 provided at the base end of the column 50 and the base end of the column 50. A force that unwinds the photovoltaic sheet 2 of the roller 3, which is composed of a rod-shaped coupling rod 53 that extends in the horizontal direction along the installation surface and has the other end 53 a coupled to the storage case 4 of the photovoltaic unit U. In such a situation, the support 50 is prevented from falling down, and the photovoltaic power generation sheet 2 can be held in an extended state by its own weight without being largely bent by its own weight. That is, according to this example, it is not necessary to provide the ratchet brake mechanism on the roller 3.

  As shown in FIG. 11, the leg member 52 is a support leg that spreads two plate-like members to the left and right to prevent the column from falling down in the lateral direction, and overlaps with the connecting rod 53 when stored after use. All of them are pivotally supported on the lower surface of a hinge portion 54 described later so as to be stored compactly. The connecting rod 53 is foldably connected to the base end portion of the support column 50 via a hinge portion 54, and when stored after use, the support rod 50, the connecting rod 53, and the leg member 52 are arranged in one direction as shown in FIG. It is configured so that it can be stored compactly. The hinge portion 54 is provided with a lock mechanism that pops out and fixes when the hinge portion 54 is opened at 90 degrees, and can be folded by pushing the button.

  Each of the support 50 and the connecting rod 53 is a telescopic rod body in which a button pops out and is fixed when the inner pipe is pulled out, and both lengths can be changed according to the season (the height of the sun). Specifically, as shown in FIG. 12, a hole through which the button pops out is provided at three positions, and the height (the length of the column 50) and the distance to the storage case 4 (the connection rod 53) By changing the length), the extension angle of the photovoltaic power generation sheet 2 can be easily set to an angle according to the season.

  Next, a third embodiment of the present invention will be described based on FIG.

  In this embodiment, the holding member 51 of the column 50 in the sheet support means 5 that holds the posture of the photovoltaic sheet 2 is connected at one end to the tip 50c of the column 50, and the photovoltaic sheet 2 at the other end. It is comprised from the wire 55 which has the fixing | fixed part 55a fixed to the installation surface diagonally downward on the opposite side. As the wire 55, a rope, a string, a wire, or the like can be suitably used, and a holding member can be realized at a low cost. More preferably, two or more wire rods 55 are used for the same tip 50c of the column 50 to be fixed and stably held at two or more locations in the lateral direction. In this example, the wire fixing portion 55a is an anchor fixing portion.

  Next, a fourth embodiment of the present invention will be described based on FIG.

  In the present embodiment, the sheet support means 5 that holds the posture of the photovoltaic power generation sheet 2 is stretched between a support rod 56 having flexibility that can be curved and deformed in an arch shape, and an end portion of the support rod 56. And a holding member 57 that holds the support rod 56 in a curved deformation state. An engaging portion 56 a that engages with the front end portion of the photovoltaic power generation sheet 2 is provided at a midway position that is the curved top portion of the support rod 56. That is, a state where the photovoltaic power generation sheet 2 pulled out from the storage case 4 is held obliquely upward by the engaging portion 56a at the top of the support rod 56 which is bent and deformed by the holding member 57 during use. Is to hold.

  The height position of the engaging portion 56a can be changed by changing the holding position of the support rod 56 by the holding member 57 and changing the curved shape of the support rod 56, thereby adjusting the vertical angle of the photovoltaic power generation sheet 2. it can. In this example, the support rod 56 has a substantially Y-shaped structure branched from an intermediate position to obtain a stable left and right support function, but other shapes such as an X-shape are also possible. The holding member 57 may be a wire rod such as a rope, a string, or a wire, and it is preferable to provide a plurality of rings for holding the end of the support rod 56 and select the ring according to the season to change the height of the engaging portion 56a. .

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and can of course be implemented in various forms without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Photovoltaic power generation device 2 Photovoltaic power generation sheet 2c Side edge 3 Roller 4 Storage case 5 Sheet support means 6 Locking member 7 Rotation support shaft 8 Coil spring 20 Solar cell 20b Through-hole 21 Lead wire 22 Synthetic resin sheet material 30 Tube Shaped material 30a Protrusion 30c Through hole 31 Support material 31a, 32a Flange 31b, 32b Mounting screw 32 Roller support material 33 End bracket 33a Groove portion 40 Drawer port 41 Front surface 42 Lid body 43 Hinge 50 Post 50a Engagement portion 50c Tip portion 51 Holding Member 52 Leg member 53 Connecting rod 53a Other end portion 54 Hinge portion 55 Wire material 55a Fixing portion 56 Support rod 56a Engaging portion 57 Holding member 60 Locking rod 60a End portion 61 Holding portion 70 Support member 71 Rotation support shaft 72 Rotation support shaft 72a, 74a communication hole 73 spacer 74 shaft body 81 bowl-shaped end 2 hooked ends 90 and 91 the brush 92, 93 electrode tube 94 internal wiring 96 insulating member 97 supporting piece A roller unit R1 opening region R2 opening area S power storage device U photovoltaic unit

Claims (2)

A flexible photovoltaic power generation sheet and a roller that winds the photovoltaic power generation sheet, and a storage case that winds the photovoltaic power generation sheet around the roller and that can be pulled out . A positive brush and a negative brush connected to the output line of the photovoltaic power generation sheet are projected at different positions in the axial direction on the inner peripheral surface side, and the outer periphery of the rotation support shaft extended inside the roller Portable solar light with a structure in which a positive electrode cylinder and a negative electrode cylinder that are in sliding contact with each brush are provided on the surface in an insulated state, and the generated power is extracted from these electrode cylinders to the outside of the roller through the internal wiring of the rotation support shaft. Power generation device. A photovoltaic sheet having flexibility, a built-in roller for winding the photovoltaic sheet, winding the photovoltaic sheet in the roller, and a storage case for withdrawable accommodated, the solar light The power generation sheet has a structure having positive / negative output electrodes on the front end side and the base end side of the sheet, and along the side end portion of the photovoltaic power generation sheet, the output electrode on the front end side of the sheet and the inner peripheral surface side of the roller A portable solar power generation apparatus in which lead wires for connecting brushes are attached so as to be inserted into a plurality of through holes formed along side end portions of the solar power generation sheet alternately and sewn .

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