JP2014150665A - Solar battery unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar battery unit which inhibits temperature rise in a body case for storing a charging medium and improves the life performance of the charging medium, such as a secondary battery, by a simple structure at low costs.SOLUTION: A solar battery unit comprises: a solar panel 2; a body case 3 which supports the solar panel 2 and stores a charging medium 15 for storing electric power from the solar panel 2; an outer peripheral wall 5 which is formed so as to cover an outer periphery of the body case 3; and a space part 6 provided between a bottom surface 2a of the solar panel 2 and an upper surface 3a of the body case 3. Multiple vent holes 7 for performing ventilation to the space part 6 are provided on the outer peripheral wall 5.

Description

  The present invention relates to a solar battery unit having a solar panel and a charging medium for storing electric power thereof, and more particularly to improving the life performance of a charging medium such as a secondary battery.

  Conventionally, a solar battery unit having a solar panel using sunlight and a charging medium such as a secondary battery for storing electric power thereof is known. In this solar battery unit, for example, a secondary battery and a control unit that controls the entire unit are housed in a case body.

  Since the solar panel receives sunlight, the main body case is exposed to direct sunlight and the temperature inside the case main body rises, so that there is a problem that the secondary battery deteriorates early and the durability is low. For this reason, conventionally, it has been known to ventilate the inside of the case body with outside air by forming a vent on the side surface of the case body (for example, Patent Document 1).

JP-A-9-161157

  However, in Patent Document 1, since the main body case is still exposed to direct sunlight, there is a case where the temperature rise cannot be sufficiently suppressed only by ventilation at the vent, and the life performance of the secondary battery can be sufficiently improved. could not. In addition, rain and insects may enter from the ventilation holes provided in the main body case, and there is a problem in terms of waterproofness and insectproofing.

  The present invention provides a solar battery unit that solves the above-described problems and suppresses the temperature rise inside the main body case that stores the charging medium that stores the electric power from the solar panel, thereby improving the life performance of the charging medium. The purpose is to do.

  In order to achieve the above object, a solar battery unit according to one configuration of the present invention includes a solar panel, a main body case that supports the solar panel and stores a charging medium that stores electric power from the solar panel, and the main body case. An outer peripheral wall formed to cover the outer periphery of the solar cell and a space provided between the bottom surface of the solar panel and the upper surface of the main body case, and the outer peripheral wall is ventilated to the space A plurality of vent holes are provided. Here, the charging medium includes a secondary battery and a capacitor.

  According to this configuration, the main body case can be insulated by the space provided between the solar panel and the main body case for storing the charging medium, and the heat insulation is provided by ventilating the space by the vent hole provided in the outer peripheral wall. In addition to enhancing the effect, the outer peripheral wall can block the main body case from being shielded by the wall surface, thereby suppressing an increase in temperature inside the main body case. In addition, the wall surface of the outer peripheral wall has an effect of improving waterproofing and insectproofing with respect to the inside of the main body case. Thereby, the temperature rise inside a main body case which stores the charging medium which stores the electric power from a solar panel can be suppressed, and the lifetime performance of charging media like a secondary battery can be improved.

  In this invention, it is preferable that the clearance gap formed between the side surface of the said main body case and the said outer peripheral wall is opening below. Therefore, air convection can be performed from the lower part of the gap to the upper space part and the vent hole, and the temperature rise inside the main body case can be further suppressed.

  Preferably, the inside of the main body case is divided into a plurality of sections so as to individually store the secondary battery and other electronic components. Therefore, the heat insulation effect of the main body case can be further enhanced by partitioning the charging medium and the control circuit.

  Preferably, in the space portion, a heat insulating material is provided on at least one of the bottom surface of the solar panel and the top surface of the main body case. Therefore, the heat insulation effect to the main body case can be further enhanced.

  In an object detection device according to another configuration of the present invention, a detection unit is driven by the solar battery unit. According to this configuration, in the object detection device used for the outdoor security sensor, it may be difficult to secure a driving power supply. However, since this solar battery unit has a high life performance of the charging medium, the object detection device is driven. It can be fully applied to the power supply.

  The present invention can insulate the main body case by the space provided between the solar panel and the main body panel for storing the charging medium, and the heat insulating effect can be obtained by ventilating the space by the vent hole provided in the outer peripheral wall. In addition to increasing the height of the outer peripheral wall, it is possible to prevent the temperature inside the main body case from rising by shielding the main body case from the wall surface.

It is a perspective view which shows the solar battery unit which concerns on one Embodiment of this invention. FIG. 2 is a partially exploded view of the solar battery unit of FIG. It is a side view which shows a solar battery unit. It is a perspective view which shows the object detection apparatus which used the solar battery unit as the drive power supply.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a solar battery unit 1 according to an embodiment of the present invention. FIG. 2 is a partially exploded partially exploded view seen from the back side of the solar battery unit 1 of FIG. FIG. 3 is a side view of the solar battery unit 1 of FIG.

  The solar battery unit 1 of FIG. 1 includes a main body 1A having a solar panel 2, a main body case 3, and an outer peripheral wall 5 formed so as to cover the outer periphery of the main body case 3. As shown in FIG. 3, the main body case 3 has a substantially box-like shape, and includes an upper half case 3A including a case upper surface 3a and a lower half case 3B including a case bottom surface 3b. In the lower half case 3B, a charging medium such as a secondary battery 15 that stores DC power from the solar panel 2 and a control circuit (control board) 16 that controls the entire unit are housed. For example, a lithium ion battery is used as the secondary battery 15. The exterior of the case body 3 and a space portion 6 to be described later are inserted through a plurality of vent holes 8 provided between the bottom surface 2 a of the solar panel 2 and the top surface 3 a of the body case 3.

  The outer peripheral wall 5 can prevent the temperature increase in the main body case 3 by shielding the main body case 3 with the wall surface. Moreover, since the wall surface of the outer peripheral wall 5 covers the outer periphery of the main body case 3, it also has an effect of improving the waterproofness and insect-proofing properties with respect to the inside of the main body case 3.

  A space 6 is provided between the bottom surface 2 a of the solar panel 2 and the case top surface 3 a of the main body case 3. The space 6 can insulate the main body case 3 from the heat of the solar panel 2. A plurality of vent holes 8 are provided between the bottom surface 2 a of the solar panel 2 and the top surface 3 a of the main body case 3. As shown in FIG. 2, the outer peripheral wall 5 is provided with a plurality of vent holes 7 at positions facing the space 6. In this example, vent holes 7 are provided on the four surfaces of the outer peripheral wall 5 to promote air convection in the space 6. By this vent hole 7, the outside air flows into the space portion 6 through the vent hole 8 and ventilates the space portion 6, whereby the heat insulating effect can be enhanced.

  The outer peripheral wall 5 is fixed to the bottom surface 2 a of the solar panel 2, and a gap 9 formed between the side surface of the main body case 3 and the outer peripheral wall 5 opens downward. The gap 9 allows air to convect from the lower portion of the gap 9 to the upper space 6 and the vent hole 7 of the outer peripheral wall 5, thereby further suppressing the temperature rise inside the main body case 3.

  The solar battery unit 1 of FIG. 1 further includes a support portion 10 that supports the main body 1A so as to be rotatable in the R direction, and an attachment portion 11 for fixing the unit. The main body 1 </ b> A rotates in the R direction around the rotation axis formed by the screws 12 of the support portion 10, and the angle of the solar surface of the solar panel 2 can be arbitrarily changed.

  As shown in FIG. 3, in this example, the inside of the main body case 3 is not partitioned, but may be partitioned into a plurality of sections so as to individually store electronic components such as the secondary battery 15 and the control circuit 16. Good. In this case, by partitioning the secondary battery 15, the control circuit 16, and the like with the partition plate 31 (two-dot chain line), each part is insulated by the partition plate 31, and the heat insulating effect of the main body case 3 can be further enhanced.

  In the space 6, a heat insulating material 32 (two-dot chain line) may be provided on at least one of the bottom surface 2 a of the solar panel 2 and the top surface 3 a of the main body case 3. In this case, the heat insulation effect to the main body case 3 can be further enhanced.

  As described above, in the present invention, the main body case 3 can be insulated by the space portion 6 provided between the solar panel 2 and the main body case 3 that houses the secondary battery 15, and the vent hole 7 provided in the outer peripheral wall 5. Thus, the heat insulation effect is enhanced by ventilating the space 6, and the outer peripheral wall 5 can prevent the temperature of the body case 3 from rising by shielding the body case 3 from the wall surface. Further, the wall surface of the outer peripheral wall 5 also has an effect of improving the waterproof property and the insect proof property with respect to the inside of the main body case 3. Thereby, the temperature rise in the main body case 3 that houses the secondary battery 15 that stores the electric power from the solar panel 2 can be suppressed, and the life performance of the secondary battery 15 can be improved.

  The solar battery unit 1 can be used as a driving power source for the object detection device 20, for example. The object detection device 20 is used for detecting an object of a security sensor installed outdoors, for example.

  As shown in FIG. 4, this object detection device 20 receives, for example, a projector 21 and a detection line such as two infrared rays IR that are arranged opposite to the projector 21 and are projected from the projector 21. It is of the AIR type (active type) provided with a detection unit having a photoreceiver 22. The light projector 21 and the light receiver 22 are mounted on a pole P, a wall, and the like, respectively. The attachment part 11 of the solar battery unit 1 of FIG.

  The light projector 21 has, for example, a pair of upper and lower light projecting elements and a light projecting lens, and the light receiver 22 has a pair of upper and lower light receiving elements and a light receiving lens. This object detection device 20 is used, for example, in a security sensor that outputs an alarm signal as an object detection signal, and infrared IR from the projector 21 is shielded by the object by a control unit (not shown) in the projector 21 and the light receiver 22. At this time, an object is detected by a change in the signal level (amount of received light) of the detection signal received by the opposing light receivers 22 and an alarm signal is output.

  As described above, in the object detection device 20 used for an outdoor security sensor, it may be difficult to secure a driving power source. However, in the present invention, since the secondary battery has a high life performance, the solar battery unit 1 is used as an object. It can be sufficiently used as a driving power source for the detection device 20.

  In the above embodiment, a secondary battery is used as a charging medium, but a capacitor may be used.

  In the above embodiment, the present invention is applied to the AIR type object detection apparatus, but may be applied to the PIR type object detection apparatus. Moreover, although infrared rays are used as the detection lines, the present invention is not limited to this, and visible light, microwaves, lasers, or the like may be used.

1: Solar battery unit 2: Solar panel 3: Body case 5: Outer wall 6: Space 7: Vent 8: Vent 15: Charging medium (secondary battery)
16: Control circuit 20: Object detection device 21: Projector 22: Light receiver

Claims (5)

Solar panels,
A body case for supporting a solar panel and storing a charging medium for storing electric power from the solar panel;
An outer peripheral wall formed to cover the outer periphery of the main body case;
A space provided between the bottom surface of the solar panel and the upper surface of the main body case;
The outer peripheral wall is provided with a plurality of vent holes for venting to the space.
Solar battery unit. In claim 1,
A solar battery unit, wherein a gap formed between a side surface of the main body case and the outer peripheral wall opens downward. In claim 1,
A solar battery unit, wherein the main body case is divided into a plurality of compartments so as to individually store the charging medium and other electronic components. In claim 1,
The solar battery unit, wherein a heat insulating material is provided on at least one of the bottom surface of the solar panel and the top surface of the main body case in the space portion.   The object detection apparatus by which a detection unit is driven by the solar battery unit of any one of Claims 1-4.

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