JPH0964395A - Solar power system - Google Patents

Abstract

(57) [Summary] [Structure] The solar cell 1, the power converter 2, and the storage battery 3 can be connected to the storage box 4 with one touch, and when the solar cell 1 is set, it automatically The angle can be set so that maximum power can be obtained. [Effect] It can be assembled by anyone in the event of a disaster, electricity can be obtained wherever there is sunlight, disaster information can be obtained, and a storage battery can be used for some lighting.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a photovoltaic system.

[0002]

2. Description of the Related Art A photovoltaic power generation system mainly comprises a solar cell and a power converter such as an inverter.
It converts the light energy of the sun into electricity. This system is also roughly divided into two types, one of which is equipped with a storage battery, and is a system that charges the solar cell output power during the day and can be used at night. Another method is a method in which, when the output power amount of the photovoltaic power generation system becomes excessive, the power flow is reversed to the transmission line side. Since this method can sell surplus electric power, it has a great merit for the user, and the penetration rate is expanding. These are often provided mainly to obtain a large power of the order of kW, and there are some such as those shown in the reference document regarding product examples. For example, it is used not only for field irrigation and pumping, but also for pump systems, lighting, etc. However, since the solar cells themselves are large and heavy, they are attached so as to firmly fix the foundation work.

Further, as described in the reference document, small products such as those for calculators, road displays, camping lanterns, and the like having no system interconnection of about 10 W have been commercialized.

The above-mentioned product example is not suitable for the case where a disaster occurs and it is desired to use AC power of about 100 W, for example. Since AC power cannot be obtained with a small one, or fixed with a large system, in the event of a disaster such as an earthquake, not only can it be damaged, but it cannot be carried to an evacuation center. there were. Therefore, there is a problem in that an inconvenient life is forced to be used by using an alternative to electricity until the disaster returns.

[0005]

DISCLOSURE OF THE INVENTION The object of the present invention is to provide a medium such as a television which can easily output AC power if there is sunlight and can obtain a disaster situation at a minimum even at an evacuation site in the event of a disaster. Is to be able to use the lights at night, so that they can be used.

[0006]

In order to achieve the above-mentioned object, the present invention has an assembly structure of a solar cell module to reduce the area for transportation, and a power converter and a storage battery in the same box as the solar cell. It can be stored inside and has a transportable structure and weight so that anyone can easily install and clean it. Also, in terms of capacity, we made it possible to carry information media such as TVs or one of them and lighting so that they could be transported.

[0007]

In the present invention, the solar cell which requires the largest area can be assembled by disassembling and assembling a plurality of modules so that it can be carried by human hands in case of a disaster. The structure is made compact. In addition, the power converter, the storage battery, and the like are configured so that they can be attached with one touch, and the system components can be attached with one touch in the box that stores them. If necessary, the solar cell and the power converter can be attached. Or a combination of a storage battery and a power converter so that electric power can be supplied to the load. Further, by setting the mounting angle of the solar cell when the lid side of the storage box is opened, the energy of sunlight can be effectively used without the customer's knowledge. Since it can be easily carried and installed in this way, in the event of a disaster, electricity can be used in the plaza or shelter, and by providing a storage battery, some electricity can be used even at night.

[0008]

1 to 4 show an embodiment of the present invention.
This will be described below.

FIG. 1 is an example of a solar power generation system configuration for explaining the present invention. Reference numeral 1 denotes a solar cell, which is a foldable type in this embodiment. 2 is a power converter for converting the direct current output of the solar cell into AC, 3 is a storage battery for charging and discharging electric power, 4 is a storage box 4 for storing the solar cell 1, the power conversion device 2, and the storage battery 3, Lid 4
1 and a storage section 42. An AC outlet 5 for connecting a load (not shown) is also attached to a part of the storage box 4, which may be the lid 41 or the storage 42. Then the storage 42
The case where it is attached to will be described. A handle 6 is attached to the storage box 4, and when the lid 41 is closed, it can be carried by a human hand.

FIG. 2 is a front view of the apparatus of the present invention shown in FIG. 1 when opened, and FIG. 3 is a side view. When assembling, the lid 41 of the storage box 4 may be opened, and the solar cell 1 that is electrically and mechanically coupled to the lid 41 and folded and stored may be spread and fixed. At this time, the attachment angle θ becomes a problem in order to maximize the output of the solar cell 1. The optimum angle is the angle θ that maximizes the solar energy Pn on an annual average, and it is said that the angle θ between the solar cell 1 and the ground is about 30 degrees in the vicinity of Tokyo as shown in FIG. This is related to latitude and varies slightly from region to region,
The efficiency does not change significantly even if it is changed 2-3 times, so 30
It may be fixed near the degree. Therefore, when the lid 41 is opened and the solar cell 1 is fixed, it is preferable to fix the opening angle θ of the solar cell 1 so that the solar cell 1 is automatically tilted at about 30 degrees. The fact that the angle θ can be automatically set is very effective for a person without knowledge, and the installation can be easily performed even in the case of a confused disaster.

Further, as can be seen from FIGS. 2 and 3,
According to the embodiment of the present invention, when the solar cell 1 is expanded, the power conversion device 2 and the storage battery 3 are below the solar cell 1,
The temperature rise due to direct sunlight can be greatly reduced. Therefore, the influence of temperature on the operation can be reduced.

FIG. 5 shows an exploded view for attaching the power converter 2 and the storage battery 3 to the storage section 42. Power converter 2
Both the storage battery 3 and the storage battery 3 are attached to the joint portion 8
Since it can be attached with one touch by simply inserting it from the top with respect to 1, 82, and in order to increase the certainty, tightening with a band made of a string or the like finally increases the safety. By arranging the power converter 2 and the storage battery 3 in the storage portion 42 in this way, it is possible to cover the instability of installation due to the installation of the solar cell 1.

In the system configuration of the present invention, when there is no abnormality, for example, when the sunlight is strong in the daytime and the load is not required, the output of the AC outlet 5 is connected to the system power source by an outlet so that excess power can be supplied. Can be sold as. Further, it is not necessary to provide the storage battery 3 only in the daytime, and it is possible to operate only with the solar cell 1, the power conversion device 2, and the storage box 4. When there is no sunlight like at night, the solar cell 1 can be electrically disconnected, and AC power can be obtained by the DC voltage stored in the storage battery 3 via the power converter 2 to take a load.

In the case of an abnormality, since it can be transported, it can be taken to a place not in the shade and used in a state where it is not connected to the grid at an evacuation site. Even in such a place, the installation is easy, so that electricity can be obtained early. Moreover, because it is an integrated type housed in the storage box 4,
It is easy to carry and store as baggage, and even when installed, dust and sand are less likely to get in due to the storage box 4. A
When the C outlet 5 is not used, a protective cover may be attached to the surface of the C outlet 5 or a waterproof one may be used to provide the same dustproof effect.

Another embodiment of the present invention will be described with reference to FIGS. 6 and 7. 6 and 7 relate to a method of setting the solar cell 1 when the solar cell 1 is disassembled and housed. The solar cell 1 is disassembled into the central portion 11 and the end portions 12 and 13, and when the lid 41 is opened, the end portions 12 and 13 housed on the front surface side or the rear side (example of the present invention) of the central portion 11 become a slide type. The solar cell 1 is pulled out to form one solar cell 1. In this method, electrical connection is established by providing a portion that makes electrical contact with the boundary between the central portion 11 and the end portions 12 and 13.

Another embodiment of the present invention will be described with reference to FIG. FIG. 8 shows an example in which the portion supporting the solar cell 1 is brought to the middle portion of the lid 41. Since the mounting angle θ of the solar cell 1 is about 30 degrees as described in FIG. 4,
It is conceivable that the solar cell 1 will be in a considerably sleeping state.
Therefore, if the solar cell 1 is supported by the support portion 7 on the intermediate portion of the lid 41 in this state, the lid 41 shields sunlight. Therefore, the lid 41 should be placed at the fixed position.
It has the feature that it can prevent the sunlight from being blocked by making it break. In this case, the output power of the solar cell 1 is fixed at a contact point between the solar cell 1 and the lid 41 or the contact point between the solar cell 1 and the storage portion 42 of the storage box 4 and the connectors are joined together. With a mechanism for determining, anyone can easily assemble.

Another embodiment of the present invention is shown in FIGS.
This will be described with reference to 0. 9 and 10 are a front view and a side view of a structure in which the solar cell 1 is directly attached to the lid 41. With this configuration, although the power converter 2 and the storage battery 3 are exposed to direct sunlight, the state in which the lid 41 is opened is ready for use, so that the assembly is easy. As shown in FIG. 10, when the lid 41 of the storage box 4 is opened, the solar cell 1 is fixed to the lid 41, and the solar cell 1 is determined by setting the support portion 9 attached to a part of the lid 41. Can be angled. It can be used by preparing the power converter 2 and the storage battery 3 that operate normally even in the range of maximum temperature rise.

[0018]

According to the present invention, since the solar cell, the power converter and the storage battery are stored in the same storage box, anyone can easily operate even in a confused situation such as a disaster. Not only can the solar cell be set at the optimum angle θ, but there is also less wiring, which improves efficiency, and it can be transported as a power generator and used anywhere with sunlight. Further, since the power conversion device and the storage battery are set in the storage part of the box, the entire system can be prevented from falling.

[Brief description of drawings]

FIG. 1 is a perspective view of a solar power generation system of the present invention.

FIG. 2 is a front view of the solar power generation system of the present invention.

FIG. 3 is a side view of the solar power generation system of the present invention.

FIG. 4 is an explanatory diagram of a relationship between a solar cell mounting angle and solar radiation intensity.

FIG. 5 is an explanatory view of a method of attaching the element part.

FIG. 6 is a front view of a second embodiment of the solar power generation system of the present invention.

FIG. 7 is a side view of the second embodiment of the solar power generation system of the present invention.

FIG. 8 is a side view of an embodiment of a storage box according to the present invention.

FIG. 9 is a front view of a third embodiment of the solar power generation system of the present invention.

FIG. 10 is a side view of a third embodiment of the solar power generation system of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Solar cell, 2 ... Power converter, 3 ... Storage battery, 4 ... Storage box.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kaoru Yanagawa 7-1-1 Omika-cho, Hitachi-shi, Ibaraki Hitachi Ltd. Hitachi Research Laboratory

Claims (8)

[Claims] 1. A solar cell for converting light energy of the sun into DC power, and a power converter for converting the DC power into AC power, which are housed in a single storage box.
A solar power generation system, wherein the solar cell is attached to a lid side of the storage box, and the power conversion device is attached to a box portion. 2. A solar cell for converting light energy of the sun into direct current power, a power converter for converting the direct current power into alternating current power, and a storage battery capable of storing the direct current power, which are independent element parts. The solar power generation system is characterized in that only the element parts selected according to the purpose are incorporated into a storage box into which the above-mentioned respective element parts can be incorporated so that AC power can be supplied. 3. The photovoltaic power generation system according to claim 1 or 2, wherein the removable storage battery can be housed in the same box as the power conversion device. 4. The solar power generation system according to claim 1, wherein the solar cell module is fixed to the back side of the lid in a folded state and is opened when the lid is opened. 5. The solar cell, which is disassembled for each module, is attached to a support fitting attached to the lid so that all the modules are electrically connected. Solar power system. 6. The solar power generation system according to claim 1, wherein the lid of the storage box is fixed at an angle determined so as to efficiently take in sunlight. 7. The solar power generation system according to claim 1, wherein the lid of the storage box is configured to be bent at an intermediate portion. 8. The photovoltaic power generation system according to claim 1, wherein an AC outlet is attached to the power conversion device and / or the storage box so that a load can be taken.