Patent Application
20170141723
The present invention relates to a power generation device provided with a secondary battery.
Priority is claimed on Japanese Patent Application Nos. 2014-151836 and 2014-151837, filed on Jul. 25, 2014, the contents of which are incorporated herein by reference.
Recently, power generation devices made up of photoelectric conversion modules such as solar cells have come to be used as power sources for driving various appliances installed outdoors, for instance a street lamp, an electric display device, or the like from the viewpoint of, for instance, ecology. A power generation device configured to be able to cope with use of various appliances at night by storing electric power produced by such a photoelectric conversion module in a lead-acid battery or the like is also used.
As means for storing the produced electric power, lithium ion secondary battery or the like that have excellent recharge ability and dischargeability and smaller sizes have come to be adopted in place of conventional lead-acid batteries. Since a lithium ion secondary battery is small and thin, a lithium ion secondary battery can be easily integrated with a power generation device such as a photoelectric conversion module, and various all-in-one power generation devices have been proposed. In such an all-in-one power generation device, a photoelectric conversion module and a lithium ion secondary battery are housed or installed in a common outer casing. Therefore, an all-in-one power generation device requires no external wires, can be made small, has an excellent design, and is highly effective from the viewpoint of preventing theft.
On the other hand, an all-in-one power generation device as described above is installed outdoors and is exposed to sunlight. Therefore, since an internal temperature of the outer casing is raised to about 70° C. by radiant heat of the sunlight, and particularly in summer, a temperature of the lithium ion secondary battery can also be raised. Since heat caused by a battery reaction in the lithium ion secondary battery is generally generated during recharge and discharge, the temperature of the lithium ion secondary battery may be remarkably raised along with an increase in temperature caused by the sunlight. In this way, when the state in which the temperature of the lithium ion secondary battery is remarkably raised lasts a long time, there occurs a problem in which a cycle characteristic is degraded or evaporation of an electrolyte progresses and the battery swells. For this reason, it is necessary for such a power generation device to be provided with means for improving heat resistance of the lithium ion secondary battery or for cooling the lithium ion secondary battery.
Since the all-in-one power generation device described above suppresses an increase in the battery temperature, for example, a power generation device having a constitution in which a flat panel-like solar cell and flat panel-like power supplying means in which the cell is housed are vertically connected and are installed to lean against an installation site has been proposed (e.g., see Patent Document 1). According to the power generation device described in Patent Document 1, sunlight applied to the power supplying means side can be obstructed by the solar cell depending on the above constitution and the installation state, and there is a gap between the power supplying means and the solar cell. Thus, an increase in temperature of the power supplying means is suppressed.
A constitution in which an air layer is provided between a solar cell and a secondary battery and further an air hole communicating with this air layer is provided in an outer casing has been proposed (e.g. see Patent Document 2). According to the constitution described in Patent Document 2, external air is introduced into the air layer provided between the solar cell and the secondary battery through the air hole, and thereby an increase in temperature of the secondary battery is suppressed.
A constitution in which an outer casing in which a solar cell and electricity storing means are housed and installed is provided with a fan introducing external air thereinto, and thereby the electricity storing means housed in the inside of the outer casing can be cooled has been proposed (e.g., see Patent Document 3). According to the constitution described in Patent Document 3, external air is introduced into the outer casing by the fan, and thereby an increase in temperature of the electricity storing means housed in the outer casing is suppressed.
However, in the configurations of all of Patent Documents 1 to 3, since the external air is introduced only in the vicinity of the cell, and particularly since the external air is also high in temperature during use under the hot summer sun, a cycle characteristic of the secondary battery may be degraded without sufficient cooling efficiency being obtained.
Japanese Unexamined Patent Application, First Publication No. 2006-261567
Japanese Unexamined Patent Application, First Publication No. 2013-048532
Japanese Unexamined Patent Application, First Publication No. 2013-089317
The present invention was conceived in view of the above problem, and provides a power generation device provided with a secondary battery, which can suppress a rise in temperature of the secondary battery even when a photoelectric conversion module and the secondary battery are integrated and used, and has an excellent cycle characteristic.
Thus, to solve the above problem, the invention described in claim 1 includes: a photoelectric conversion module; a secondary battery electrically connected to the photoelectric conversion module; and an outer casing in which the photoelectric conversion module and the secondary battery are installed, wherein an insulating material is installed on at least a part of a space between the photoelectric conversion module and the secondary battery to be interposed between the photoelectric conversion module and the secondary battery.
According to the present invention, the insulating material is installed between the photoelectric conversion module and the secondary battery. Thereby, when sunlight is applied to the photoelectric conversion module, radiant heat caused by the sunlight is obstructed by the insulating material, so that an increase in temperature of the secondary battery can be suppressed.
The invention of claim 2 is characterized in that, with respect to the power generation device according to claim 1, the internal space of the outer casing is divided by the insulating material, thereby forming a plurality of chambers, and the secondary battery is installed in at least one of the plurality of chambers.
According to the present invention, the secondary battery is installed in at least one of the plurality of chambers formed by the insulating material. Thereby, the heat caused by the sunlight is obstructed, so that a increase in temperature of the secondary battery can be suppressed.
The invention of claim 3 is characterized in that the insulating material is a low heat conducting material.
According to the present invention, the low heat conducting material is disposed between the photoelectric conversion module and the secondary battery. Thereby, when the sunlight is applied to the photoelectric conversion module, conduction of the radiant heat emitted from the photoelectric conversion module toward the secondary battery is suppressed, so that an increase in temperature of the secondary battery can be suppressed.
The invention of claim 4 is characterized in at the insulating material is a heat reflector.
According to the present invention, the heat reflector is disposed between the photoelectric conversion module and the secondary battery. Thereby, when the sunlight is applied to the photoelectric conversion module, the radiant heat emitted from the photoelectric conversion module toward the secondary battery is reflected, so that an increase in temperature of the secondary battery can be suppressed.
The invention of claim 5 is characterized in that the insulating material is configured with a low heat conducting material and a heat reflector laminated on the low heat conducting material, and the low heat conducting material is disposed at the photoelectric conversion module side.
According to the present invention, the laminates of the low heat conducting material and the heat reflector are disposed between the photoelectric conversion module and the secondary battery, the radiant heat emitted from the photoelectric conversion module toward the secondary battery as described above can be obstructed by both reflection and suppression of heat conduction, so that an increase in temperature of the secondary battery can be remarkably suppressed.
The invention of claim 6 is characterized in that, in the power generation device according to any one of claims 1 to 5, a heat-radiating opening is formed at any position of the outer casing.
According to the present invention, the heat-radiating opening is provided in the outer casing. Thereby, the external air can be efficiently introduced inside, and an increase in temperature of the secondary battery can be further suppressed.
The invention of claim 7 is characterized in that, in the power generation device according to claim 6, the secondary battery includes a positive electrode terminal connected to a positive electrode collector, and a negative electrode terminal connected to a negative electrode collector, and the opening formed in the outer casing is disposed to cause external air to linearly flow in toward a heat source region including a region connecting a connecting part between the positive electrode terminal and the positive electrode collector and a connecting pail between the negative electrode terminal and the negative electrode collector at the shortest distance.
According to the present invention, the opening formed in the outer casing is disposed to cause the external air to linearly flow in toward the heat source region of the secondary battery, so that an increase in temperature of the secondary battery can be further suppressed.
The invention of claim 8 is characterized in that, in the power generation device according to any one of claims 1 to 7, a heat-radiating member is adhered to at least one of a surface opposite to a light-receiving surface of the photoelectric conversion module and a surface of the secondary battery.
According to the present invention, the heat-radiating member is adhered to at least either of the photoelectric conversion module and the secondary battery. Thereby, a heat-radiating effect is improved in the internal space of the outer casing, and an increase in temperature of the secondary battery can be remarkably suppressed.
Components in each embodiment described above and combinations thereof are one example, and additions, omissions, substitutions, and other modifications of the constitution are possible without departing from the spirit of the present invention.
According to the power generation device provided with the secondary battery related to the present invention, the constitution in which the insulating material is installed bet e photoelectric conversion module and the secondary battery is adopted. Thereby, the radiant heat caused by the sunlight is obstructed by the insulating material, so that an increase in temperature of the secondary battery can be suppressed. Thereby, even when the power generation device is installed particularly under the hot summer sun, an effect that the secondary battery can maintain a sufficient cycle characteristic is produced.
According to the power generation device provided with the secondary battery related to the present invention, the constitution in which the heat reflector is disposed between the photoelectric conversion module and the secondary battery is adopted. Thereby, when the sunlight is applied to a light-receiving surface of the photoelectric conversion module, the radiant heat emitted from the photoelectric conversion module toward the secondary battery is reflected, so that an increase in temperature of the secondary battery can be remarkably suppressed. Thereby, even when the power generation device is installed particularly under the hot summer sun, an effect that the secondary battery can maintain a sufficient cycle characteristic is produced.
Further, according to the power generation device provided with the secondary battery related to the present invention, when the power generation device is installed at a low temperature, a degree of heat insulation is adjusted. Thereby, the temperature of the secondary battery can be hardly reduced.
Hereinafter, a constitution of an embodiment of a power generation device provided with a secondary battery (hereinafter referred to simply as “power generation device”) according to the present invention will be described with appropriate reference to
A power generation device 1 that is a first embodiment of the present invention will be described mainly with reference to
The power generation device 1 of the present embodiment is, for instance, a device that can be used for driving a lighting device, an electric display device, etc. installed outdoors, such as the street lamp 100 shown in
As shown in
Hereinafter, each component of the power generation device 1 of the present embodiment will be described in detail.
As the photoelectric conversion module 2, a flat panel-like module in which electric power can be produced by exposure to light, such as a conventional known solar cell, can be adopted with no restriction.
As the secondary battery 3, a battery having excellent rechargeability and dischargeability, such as a lithium secondary battery made up of rechargeable/dischargeable cells used for a long time, can be adopted with no restriction. Such lithium ion secondary batteries include, for instance, a battery in which a secondary battery laminate (not shown) is housed inside a package 31 formed of a laminate resin film having flexibility as shown in
The outer casing 4 serves as a casing of the power generation device 1 of the present embodiment, and is a box-like member made up of a bottom plate 4b and lateral plates 4c, and an upper portion thereof serves as an opening 4a. The outer casing 4 may be formed of, for instance, a metal material having excellent heat resistance. In the example shown in
As described above, the low heat conducting material S is disposed inside the outer casing 4, and is made of a combination of plate-like members. For this reason, in the example shown in
Here, the “heat insulating” described in the present invention means that heat migration (heat transfer) resulting from conduction, convection or radiation is prevented by physical or chemical properties. The “low heat conducting material” is a member in which an insulating material that enables an action of inhibiting heat migration resulting from, particularly, conduction is used.
Thermal conductivity of the low heat conducting material is not particularly restricted as long as the above object is achieved, and is preferably equal to or less than 0.05 W/(m·K) from the viewpoint of obtaining a high heat insulating effect, more preferably 0.03 W/(m·K), and most preferably 0.02 W/(m·K). From the viewpoint of availability, cost, etc. of the material, a low heat conducting material whose heat conductivity is not too low is preferably used,
That is, as the material used for the low heat conducting material 5, for example, in addition to the resin film or paper, a low heat conducting material including an air layer, namely, a foam material such as an acrylic resin, an ethylene resin, a propylene resin, a urethane resin, a silicone resin, a rubber resin, or the like may be used with no restriction. Further, as the material of the low heat conducting material 5, an air-layer-containing porous material using a metal material with high thermal conductivity, for instance, a material made up of a metal porous membrane (a structure in which air of a porous portion does not travel) or a honeycomb structure is preferable because heat radiation and insulation characteristics are made compatible.
In the power generation device I of the present embodiment, as shown in
In the power generation device 1 provided with the secondary battery of the present embodiment, like the aforementioned constitution, as the low heat conducting material 5 is installed between the photoelectric conversion module 2 and the secondary battery 3, the radiant heat generated when sunlight is incident on the light-receiving surface 2a of the photoelectric conversion module 2 is obstructed or attenuated by the low heat conducting material 5. Thereby, an increase in temperature of the secondary battery 3 due to the radiant heat can be prevented. Therefore, even when the power generation device is installed outdoors under the hot sun, a sufficient cycle characteristic can be maintained, and a service time of the battery is also improved. Moreover, an increase in temperature of the secondary battery 3 is suppressed, and thereby swelling of the battery caused by a reduction of the internal electrolyte can be prevented from occurring. Thus, the battery is also excellent in terms of safety.
In the present embodiment, the internal space 4A of the outer casing 4 is divided by the low heat conducting material 5, and thereby a plurality of chambers are formed. The secondary battery 3 is preferably installed in at least one of the plurality of chambers. As shown in
In the installation of the low heat conducting material 5, as shown in
Here, as shown in
In the present embodiment, the heat-radiating opening 41 is preferably formed in at least one place at any position of the outer casing 4. In the example shown in
A shape of the opening 41 formed in the outer casing 4 is not particularly restricted. For example, the opening 41 may be formed as a honeycomb structure made up of a plurality of hole portions. In this case, the opening 41 preferably has a structure in which a large number of small hole portions are formed rather than a structure in which a small number of large hole portions are formed, because air exhaust efficiency and heat discharge efficiency are enhanced, and an excellent heat-radiating characteristic is obtained.
In the example shown in
In the present embodiment, for instance, a constitution in which, because a high heat-radiating characteristic can be given to the secondary battery 3 itself shown in
In the present embodiment, for instance, a constitution in which, to further enhance a heat radiation effect of the secondary battery 3, embossing (not shown) is provided at a side of the secondary battery 3 which is opposite to a lower surface 3b side of the photoelectric conversion module 2 may be adopted. In this way, the lower surface 3b side of the secondary battery 3 is subjected to embossing or adhesion of an embossed sheet, and thereby the heat of the secondary battery 3 can be discharged from the lower surface 3b toward the outer casing 4.
A power generation device 11 provided with a secondary battery Which is a second embodiment of the present invention will be described mainly with reference to
As shown in
Like the power generation device 1 of the first embodiment, as the power generation device 11 shown in
A power generation device 12 provided with a secondary battery which is a third embodiment of the present invention will be described mainly with reference to a cutaway view of
As shown in
As a material of each of the tubular members 16, a heat transferable material, for instance, a metal material such as iron, aluminum, or the like can be used. Since the tubular members 16 can perform heat radiation and cooling on the low heat conducting material 5 using external air introduced from the outside, radiant heat directed from the photoelectric conversion module 2 side to the secondary battery 3 side can be more effectively obstructed. Thereby, as described above, even when the power generation device is installed outdoors under the hot sun, an increase in temperature of the secondary battery 3 can be effectively prevented, and a sufficient cycle characteristic can be maintained. Since a service time of the battery can be improved, and swelling of the battery caused by a reduction of an internal electrolyte can be prevented from occurring, the battery is also excellent in terms of safety. Further, in the constitution provided with the tubular members 16, since the external air can be introduced with the internal space 4A of the outer casing 4 closed, the heat radiation and cooling can be performed without bringing dust or moisture contained in the external air into contact with the photoelectric conversion module 2 or the secondary battery 3.
In the present embodiment, as the tubular members 16 having the aforementioned constitution are provided, heat exchange can be performed between the external air circulating in the tubular members 16 and internal air of the internal space 4A. Thus, an increase in temperature of the secondary battery 3 can be further suppressed.
A power generation device 13 provided with a secondary battery which is a fourth embodiment of the present invention will be described mainly with reference to a cutaway view of
As shown in
A material of each of the heat-radiating members 17A and 17B is not particularly restricted as long as it has a heat-radiating function. However, in addition to a graphite material or the like that has excellent heat-radiating characteristics, for instance, a sheet material of iron or aluminum may be used.
As the heat-radiating member 17A sticking to the photoelectric conversion module 2, a member in which a function of reflecting radiant heat is weaker is preferable because there is a low possibility of an increase in temperature of the photoelectric conversion module 2 clue to reflective heat. As the heat-radiating member 17A, a member that is a shade of black that is weak in the function of reflecting the radiant heat is preferable as described above because there is a low possibility of an increase in temperature of the photoelectric conversion module
According to the power generation device 13 shown in
A power generation device 101 that is a fifth embodiment of the present invention will be described mainly with reference to
Like the power generation device 101 of the first embodiment described above, the power generation device 101 of the present embodiment can be used, for instance, for driving a lighting device, an electric display device, etc. installed outdoors, such as the street lamp 200 shown in
As shown in
Hereinafter, each component of the power generation device 101 of the present embodiment will be described. In the present embodiment, components that are the same as those of the power generation devices 1, 11, 12, and 13 of the first, second, third, and fourth embodiments will be described with the same reference signs, and a detailed description will be omitted.
As the photoelectric conversion module 2, the secondary battery 3, and the outer casing 4 provided for the power generation device 101 of the present embodiment, those having the same constitutions as the power generation devices 1, 11, 12, and 13 of the first to fourth embodiments may be adopted.
As described above, the heat reflector 8 is formed of a plate-like member disposed inside the outer casing 4. In the example shown in
Here, an “insulating material” is a material that can inhibit heat from being transmitted from a certain member to another member by heat transfer, radiant heat, or convection. “Heat reflection” described in the present invention means that heat migration resulting from radiation is heat-shielded (reflected) by physical or chemical properties. In addition, the “heat reflector” is a member for which a material enabling a heat shield (reflection) action is used, and such materials include a heat reflective material that can increase heat reflectivity of a surface of the member.
From the viewpoint of increasing a heat insulating effect, the reflectivity of the heat reflector is preferably not less than 50%, more preferably 90%, and most preferably 99%.
To be specific, the material used for the heat reflector 8 is not particularly restricted, but a material used for reflecting heat for a long time may be adopted with no restriction. Such heat reflective materials include, for instance, a silver plated part, a gold plated part, an aluminum plated part, an aluminum vapor-deposited part, or the like.
In the example shown in
In the power generation device 101 of the present embodiment, as shown in
In the power generation device 101 provided with the secondary battery of the present embodiment, like the above constitution, the heat reflector 8 is disposed between the photoelectric conversion module 2 and the secondary battery 3, and thereby the radiant heat generated by the incidence of the sunlight on the light-receiving surface 2a of the photoelectric conversion module 2 and emitted from the photoelectric conversion module 2 toward the secondary battery 3 is reflected by the heat reflector 8. Thereby, since the radiant heat can be inhibited from being directed to the secondary battery 3 side, an increase in temperature of the secondary battery 3 can be prevented. Therefore, even when the power generation device is installed outdoors under the hot sun, a sufficient cycle characteristic can be maintained, and a service time of the battery is also improved. Moreover, an increase in temperature of the secondary battery 3 is suppressed, and thereby swelling of the battery caused by a reduction of the internal electrolyte can be prevented from occurring. Thus, the battery is also excellent in terms of safety.
The present embodiment may adopt a constitution in which the internal space 4A of the outer casing 4 is divided by the heat reflector 8, and thereby a plurality of chambers are formed, and in which the secondary battery 3 is installed in at least one of these plurality of chambers. In the example shown in
In the installation of the heat reflector 8, as shown in
Here, as described above, since the heat reflector 8 uses the heat-reflecting function, an increase in temperature of the secondary battery 3 installed at a lower portion of the internal space 4A of the outer casing 4 is suppressed, whereas the radiant heat reflected by the heat reflector 8 returns to the photoelectric conversion module 2, and there is concern of an increase in temperature occurring at this photoelectric conversion module 2. In this way, when a sharp rise in temperature occurs at the photoelectric conversion module 2, an influence may be produced on a power generating characteristic. To suppress this occurrence of the heat returning to the photoelectric conversion module 2 clue to the heat reflection, as described above, the air layer is preferably secured between the photoelectric conversion module 2 and the heat reflector 8.
Similarly to the power generation device 1 of the first embodiment described above or the like, as shown in
In the present embodiment, similarly to the power generation device 1 of the first embodiment or the like, the heat-radiating opening 41 is preferably formed in at least one place at any position of the outer casing 4. In the example shown in
A shape of the opening 41 formed in the outer casing 4 is not particularly restricted. Similarly to the case of the first embodiment or the like, the opening 41 may be formed, for instance, as a honeycomb structure made up of a plurality of hole portions. In this case, the opening 41 preferably has a structure in which a large number of small hole portions are formed rather than a structure in which a small number of large hole portions are formed, because air exhaust efficiency and heat discharge efficiency are enhanced, and an excellent heat-radiating characteristic is obtained.
In the present embodiment, similarly to the case of the first embodiment or the like, for instance, a constitution in which, since a high heat-radiating characteristic can be given to the secondary battery 3 itself shown in
In the present embodiment, similarly to the case of the first embodiment or the like, for instance, a constitution in which, to further improve the heat-radiating effect of the secondary battery 3, embossing (not shown) is provided at a side of the secondary battery 3 which is opposite to a lower surface 3b side of the photoelectric conversion module 2 may be adopted. In this way, the lower surface 3b side of the secondary battery 3 is subjected to embossing or adhesion of an embossed sheet, and thereby the heat of the secondary battery 3 can be discharged from the lower surface 3b toward the outer casing 4.
A power generation device 111 provided with a secondary battery which is a sixth embodiment of the present invention will be described mainly with reference to
As shown in
According to the power generation device 111 shown in
A power generation device 112 provided with a secondary battery which is a seventh embodiment of the present invention will be described mainly with reference to a cutaway view of
As shown in
The tubular members 16 are identical to the tubular members 16 provided for the power generation device 12 of the third embodiment shown in
In the present embodiment, as the tubular members 16 having the aforementioned constitution are provided, heat exchange can be performed between the external air circulating in the tubular members 16 and internal air of the internal space 4A as described above. For this reason an increase in temperature of the secondary battery 3 can be more effectively suppressed.
A power generation device 113 provided with a secondary battery which is an eighth embodiment of the present invention will be described mainly with reference to a cutaway view of
As shown in
The heat-radiating member 17A is identical to the heat-radiating member 17A provided for the power generation device 13 of the fourth embodiment shown in
A method of adhering the heat-radiating member 17A to the lower surface 2b of the photoelectric conversion module 2 is not particularly restricted, and a conventional known method using an adhesive may be adopted with no restriction.
As the heat-radiating member 17A, a member in which a function of reflecting radiant heat is weaker is preferable because there is a low possibility of an increase in temperature of the photoelectric conversion module 2 due to reflective heat. As the heat-radiating member 17A, a member that is a shade of black that is weak in the function of reflecting the radiant heat is preferable as described above because there is a low possibility of an increase in temperature of the photoelectric conversion module 2.
According to the power generation device 113 shown in
Further, according to the power generation device 113 of the present embodiment, the heat-radiating member 17A is adhered to the lower surface 2b side of the photoelectric conversion module 2. Thereby, for example, when the radiant heat emitted from the photoelectric conversion module 2 is reflected by the heat reflector 8, this reflective heat can be prevented from flowing into the photoelectric conversion module 2 again. Thereby, the photoelectric conversion module 2 is not exposed to excessive heat, and gradation thereof can be prevented.
A power generation device 114 provided with a secondary battery which is a ninth embodiment of the present invention will be described mainly with reference to a cutaway view of
As shown in
The low heat conducting material 15 is a flat panel-like member disposed inside an outer casing 4, and is made of the same material in the same shape as the low heat conducting material 15 provided for the power generation device 11 of the second embodiment shown in
In the example shown in
As the method of adhering the heat reflector 8 to the low heat conducting material 15, a conventional known method, for instance, using the adhesive may be adopted with no restriction.
According to the power generation device 114 shown in
In the present embodiment, the low heat conducting material 15 is disposed at the secondary battery 3 side, and the heat reflector 8 is disposed at the photoelectric conversion module 2 side. However, this is preferable because the secondary radiant heat, as described above, generated when the radiant heat emitted from the photoelectric conversion module 2 is reflected by the radiant heat can be effectively obstructed by the low heat conducting material 15, and is prevented from being directed to the secondary battery 3 side.
In the present embodiment, even when a predetermined gap is provided between the low heat conducting material 15 and the heat reflector 8, the effect of reflecting and obstructing the radiant heat as described above is sufficiently obtained.
<Other Modifications>
Other modifications of the present invention will be described below. In the following description, a detailed description of components that are the same as those of the power generation devices 1, 11, 12, 13, 101, 111, 112, 113, and 114 of the respective embodiments described above will be omitted.
As the secondary battery 3 used in the power generation device, for example, any of a battery in which, as in the secondary battery 3A shown in
Although not shown in detail, in forming the heat-radiating opening 41 of the outer casing 4 as shown in
In the power generation devices 1, 11, 12, 13, 101, 111. 112, 113, and 114 of the respective embodiments, as in the example shown in the top view of
In the example shown in
In the power generation device according to the present invention, further, the heat-radiating member is more preferably adhered to a surface of the secondary battery. In the example shown in
In the power generation devices 1, 11, 12, 13, 101, 111, 112, 113, and 114 of the respective embodiments, the example in which the internal space 4A of the outer casing 4 is divided by the low heat conducting material 5 or 15 or the heat reflector 8 or 18, and thereby the plurality of chambers are formed has been described, but the invention is not limited thereto. Although not shown, for example, the internal space of the outer casing may be divided using a plate member formed of a material other than the insulating material, and the insulating material may be adhered to an upper surface side of the plate member forming the chamber in which the secondary battery is installed, i.e. to the photoelectric conversion module side. Even in a case having this constitution, as described above, since the radiant heat directed from the photoelectric conversion module to the secondary battery side is obstructed, an effect of making it possible to suppress an increase in temperature of the secondary battery is obtained.
Further, in the power generation devices 1, 11, 12, 13, 101, 111, 112, 113, and 114 of the respective embodiments, a circuit (not shown) in which the photoelectric conversion module 2 and the secondary battery 3 are electrically connected, and electric power from the photoelectric conversion module 2 can be stored in the secondary battery 3, and a circuit (not shown) for recharging and discharging the secondary battery 3 are preferably provided.
Moreover, a circuit used to supply electric power for driving a light-emitting device (not shown) or each electronic appliance from the secondary battery 3 may be provided. In addition, this light-emitting device or each electronic appliance can be disposed, for instance, inside or outside the outer casing 4 in which the power generation device 1 is housed.
Components in each embodiment described above and combinations thereof are one example, and additions, omissions, substitutions, and other modifications of the constitution are possible without departing from the spirit of the present invention. The present invention is not limited by each embodiment and each example.
1, 11, 12, 13, 101, 111, 112, 113, 114 Power generation device provided with secondary battery (power generation device)
2 Photoelectric conversion module
2
a Light-receiving surface
2
b Lower surface
3, 3A, 3B, 3C Secondary battery
3
a Upper surface
3
b Lower surface
31 Package
31
a Sealing part
32 Positive electrode collector
32
a Positive electrode terminal
32
b Connecting part
33 Negative electrode collector
33
a Negative electrode terminal
33
b Connecting part
4 Outer casing
4A Internal space
4
a Upper surface opening
4
b Bottom plate
4
c Lateral plate
41 Opening
45, 46 Space
5, 15 Low heat conducting material (insulating material)
8, 18 Heat reflector (insulating material)
16 Tubular member
16
a Opening
17A, 17B Heat-radiating member
17
a,
17
b End
61, 62, 63 Heat-radiating member
L Shortest distance
H Heat source region
| Number | Date | Country | Kind |
|---|---|---|---|
| 2014-151836 | Jul 2014 | JP | national |
| 2014-151837 | Jul 2014 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2015/071120 | 7/24/2015 | WO | 00 |
