This Nonprovisional application claims priority under 35 U.S.C. §119(a) on Patent Application No. 2009-141597 filed in Japan on Jun. 12, 2009, the entire contents of which are hereby incorporated by reference.
The present invention relates to a solar battery module, and to an electronic component, an electric component and an electronic apparatus mounting the same.
In recent years, solar energy has been attracting attention due to its potential in terms of energy conservation and energy generation, and private solar energy generator systems for home use and the like are becoming more and more popular. Further, in addition to large-sized fixated solar energy generator systems, solar battery modules mountable on portable telephones and the like, small-sized portable solar energy generator systems and the like are appearing. Small-sized solar battery modules are very efficient as a means to electrically charge portable telephones or portable apparatuses in case of emergency, especially in regions with long daylight hours.
For example, Patent Literature 1 discloses a solar battery module able to reduce a temperature rise when installed on a building.
Patent Literature 1
Japanese Patent Application Publication, Tokukai, No. 2009-76693 (Publication Date: Apr. 9, 2009)
However, general solar battery modules have such a problem that an amount of electric power generated decreases considerably not only when no sunlight is received, but also when only a part of the module is shaded.
In (a) of
A schematic view of an internal circuit of the solar battery module 101 is shown in
A curve 105 corresponds to an outputted electric power of the solar battery module 101 in the disposition shown in (b) of
A curve 106 corresponds to an outputted electric power of the solar battery module 101 in the disposition shown in (c) of
Further,
In this way, such a problem occurs with solar battery modules having a general cell disposition that an amount of generated electric power decreases considerably even when only a part of the solar battery module is shaded.
The present invention is attained in view of the above problems. An object of the present invention is to provide (i) a solar battery module able to achieve a stable energy supply without a considerable decrease in electric power generation efficiency even when partially shaded, and (ii) an electronic component, an electric component and an electronic apparatus mounting the same. Solution to Problem
In order to solve the above problems, a solar battery module in accordance with the present invention includes at least two cell groups each constituted by electrically connecting in parallel at least two solar battery cells, said at least two cell groups being connected in series, all of the solar battery cells being in a matrix disposition, each row of the matrix including at least two cell groups and each column of the matrix including at least two cell groups.
With the above configuration, even in a case where a part of the solar battery module becomes shaded and only one row or one column fully receives sunlight, at least two cell groups are included in the row or the column fully receiving sunlight. Accordingly, there is not a single cell group among the plurality of cell groups which does not receive any sunlight. As a result, it is possible to provide a solar battery module able to achieve a stable energy supply without a considerable decrease in electric power generation efficiency even when partially shaded.
In order to solve the above problems, a solar battery module in accordance with the present invention includes (i) at least two solar battery cells and (ii) at least three first cell groups each constituted by electrically connecting in parallel at least two solar battery cells, at least two of said at least three first cell groups being electrically connected in series with each other to constitute a second cell group, the (i) at least two solar battery cells and the second cell group are connected in parallel with each other to constitute a third cell group, one of said at least three first cell groups not constituting the second cell group being electrically connected in series with the third cell group to constitute the solar battery module, all of the solar battery cells being in a matrix disposition, each row of the matrix including the first cell group and the third cell group, and each column of the matrix including the first cell group and the third cell group.
With the above configuration, even in a case where a part of the solar battery module becomes shaded and only one row or one column fully receives sunlight, the first cell group and the third cell group are included in the row or the column fully receiving sunlight. Accordingly, there is not a single cell group which does not receive any sunlight among the first cell group and the third cell group. As a result, it is possible to provide a solar battery module able to achieve a stable energy supply without a considerable decrease in electric power generation efficiency even when partially shaded.
In order to solve the above problems, a solar battery module in accordance with the present invention includes (i) at least three solar battery cells and (ii) at least one first cell group constituted by electrically connecting in series at least two solar battery cells, at least one of said (i) at least three solar battery cells and said at least one first cell group being electrically connected in parallel with each other to constitute a second cell group, at least two of said at least three solar battery cells other than the solar battery cells constituting the second cell group being electrically connected in parallel with each other to constitute a third cell group, and the third cell group and the second cell group being electrically connected in series with each other to constitute the solar battery module, all of the solar battery cells being in a matrix disposition, each row of the matrix including the second cell group and the third cell group, and each column of the matrix including the second cell group and the third cell group.
With the above configuration, even in a case where a part of the solar battery module becomes shaded and only one row or one column fully receives sunlight, the second cell group and the third cell group are included in the row or the column fully receiving sunlight. Accordingly, there is not a single cell group which does not receive any sunlight among the second cell group and the third cell group. As a result, it is possible to provide a solar battery module able to achieve a stable energy supply without a considerable decrease in electric power generation efficiency even when partially shaded.
In order to solve the above problems, a solar battery module includes at least four first cell groups each constituted by electrically connecting in series at least two solar battery cells, every at least two of said at least four first cell groups being electrically connected in parallel with each other to constitute at least two second cell groups, said at least two second groups being electrically connected in series with each other to constitute the solar battery module, all of the solar battery cells being in a matrix disposition, each row of the matrix including at least two second cell groups and each column of the matrix including at least two second cell groups.
With the above configuration, even in a case where a part of the solar battery module becomes shaded and only one row or one column fully receives sunlight, at least two of the second cell groups are included in the row or the column fully receiving sunlight. Accordingly, there is not a single second cell group which does not receive any sunlight. As a result, it is possible to provide a solar battery module able to achieve a stable energy supply without a considerable decrease in electric power generation efficiency even when partially shaded.
As above, in a solar battery module in accordance with the present invention, all of the solar battery cells are in a matrix disposition, so that each row of the matrix includes at least two cell groups, and so that each column of the matrix includes at least two cell groups.
Further, as above, a solar battery module in accordance with the present invention includes (i) at least two solar battery cells and (ii) at least three first cell groups each constituted by electrically connecting in parallel at least two solar battery cells, at least two of said at least three first cell groups being electrically connected in series with each other to constitute a second cell group, the (i) at least two solar battery cells and the second cell group are connected in parallel with each other to constitute a third cell group, one of said at least three first cell groups not constituting the second cell group being electrically connected in series with the third cell group to constitute the solar battery module, all of the solar battery cells being in a matrix disposition, each row of the matrix including the first cell group and the third cell group, and each column of the matrix including the first cell group and the third cell group.
In addition, as above, a solar battery module in accordance with the present invention includes (i) at least three solar battery cells and (ii) at least one first cell group constituted by electrically connecting in series at least two solar battery cells, at least one of said at least three solar battery cells and said at least one first cell group being electrically connected in parallel with each other to constitute a second cell group, at least two of said at least three solar battery cells other than the solar battery cells constituting the second cell group being electrically connected in parallel with each other to constitute a third cell group, and the third cell group and the second cell group being electrically connected in series with each other to constitute the solar battery module, all of the solar battery cells being in a matrix disposition, each row of the matrix including the second cell group and the third cell group, and each column of the matrix including the second cell group and the third cell group.
Moreover, as above, a solar battery module includes at least four first cell groups each constituted by electrically connecting in series at least two solar battery cells, every at least two of said at least four first cell groups being electrically connected in parallel with each other to constitute at least two second cell groups, said at least two second groups being electrically connected in series with each other to constitute the solar battery module, all of the solar battery cells being in a matrix disposition, each row of the matrix including at least two second cell groups, and each column of the matrix including at least two second cell groups.
As a consequence, it is possible to provide a solar battery module able to achieve a stable energy supply without a considerable decrease in electric power generation efficiency even when partially shaded, and to provide an electronic component, an electric component and an electronic apparatus mounting the solar battery module.
Following is an explanation of one embodiment of the present invention, with reference to
In the solar battery module 1, (i) each solar battery cell and (ii) an on-substrate land 6 formed on a module substrate 5 are connected to each other via a bonding wire 4. Further, in the solar battery module 1, extraction electrodes 7 and 8, formed on the module substrate 5, are electrodes used to connect electrically the solar battery module 1 and an electronic component, an electric component or an electronic apparatus on which the solar battery module 1 is mounted or which are supplied with electric power from the solar battery module 1. The extraction electrodes 7 and 8 may also connect electrically the solar battery module 1 and another solar battery module.
A disposition of the solar battery cells in the solar battery module 1 in accordance with the present embodiment is shown in (a) to (c) of
In the solar battery module 1, the solar battery cells A and B are in a matrix disposition, X axis being a row axis and Y axis being a column axis in the solar battery module 1 shown in (a) to (c) of
A schematic view of an internal circuit of the solar battery module 1 in accordance with the present embodiment is shown in
The amount of electric power generated by the conventional solar battery module 101 shown in (a) of
In contrast, the amount of electric power generated by the solar battery module 1 in accordance with the present embodiment shown in (a) of
In this way, in the solar battery module 1, the amount of electric power generated when the upper ½ area γ or the lower ½ area δ is shaded is about ½ of the amount of electric power generated when the upper ½ area γ and the lower ½ area δ are not shaded (curve 105 of
Accordingly, with the solar battery module 1 in accordance with Embodiment 1, there is no such considerable decrease of the amount of generated electric power as in the case of the conventional solar battery module 101, even when a part of the solar battery module 1 is shaded, and it is possible to achieve a stable electric power supply.
The present invention may be arranged such that the solar battery cells A electrically connected in parallel with each other are electrically connected in parallel with a cell group 11 (second cell group) constituted by electrically connecting two cell groups 3 (first cell group) in series to constitute a solar battery module 20.
In the solar battery module 20, the cell group 11 (second cell group) is constituted by electrically connecting in series (i) a cell group 3 including two solar battery cells E electrically connected in parallel, and (ii) a cell group 3 including two solar battery cells F electrically connected in parallel. Next, a cell group 12 (third cell group) is constituted by electrically connecting in parallel (i) the cell group 11 and (ii) two solar battery cells A. Then, the solar battery module 20 is constituted by electrically connecting in series (i) the cell group 3 including two solar battery cells B electrically connected in parallel and (ii) the cell group 12.
In the solar battery module 20, all the solar battery cells A, B, E, and F are in a matrix disposition. In the matrix, each row includes (i) the cell group 3 including two solar battery cells B electrically connected in parallel and (ii) the cell group 12, and each column includes (i) the cell group 3 including two solar battery cells B electrically connected in parallel and (ii) the cell group 12.
With the above configuration, even in a case where a part of the solar battery module 20 becomes shaded and only one row or one column fully receives sunlight, (i) the cell group 3 including two solar battery cells B electrically connected in parallel and (ii) the cell group 12 are included in the row or the column fully receiving sunlight. Accordingly, there is not a single cell group among cell group 3 and cell group 12 which does not receive any sunlight. As a result, it is possible to provide a solar battery module able to achieve a stable energy supply without a considerable decrease in electric power generation efficiency even when partially shaded.
In the solar battery module 20, it must be noted that, while the cell group 12 includes two solar battery cells A electrically connected in parallel, the cell group 12 may include more than two solar battery cells A electrically connected in parallel.
In the solar battery module 1, each row of the matrix may include all cell groups 3, and each column of the matrix may include all cell groups 3.
Further, in the solar battery module 20, each row of the matrix may include the cell group 3, the cell group 11 and the cell group 12, and each column of the matrix may include the cell group 3, the cell group 11 and the cell group 12.
Additionally, the solar battery module may also include a cell group constituted by electrically connecting in series at least two solar battery cells.
In the solar battery module 21, a cell group 30 (first cell group) constituted by electrically connecting two solar cells A in series is connected with a solar battery cell E to constitute a cell group 31. (second cell group). Next, two solar battery cells B are electrically connected in parallel with each other to constitute a cell group 32 (third cell group), and the cell group 32 and the cell group 31 are electrically connected in series with each other to constitute the solar battery module 21.
In the solar battery module 21, all of the solar battery cells A, B, E are in a matrix disposition. In the matrix, each row includes the cell group 31 and the cell group 32, and each column includes the cell group 31 and the cell group 32.
With the above configuration, even in a case where a part of the solar battery module 21 becomes shaded and only one row or one column fully receives sunlight, the cell group 31 and the cell group 32 are included in the row or the column fully receiving sunlight. Accordingly, there is not a single cell group among the cell group 31 and the cell group 32 which does not receive any sunlight. As a result, it is possible to provide a solar battery module able to achieve a stable energy supply without a considerable decrease in electric power generation efficiency even when partially shaded.
In the solar battery module 22, at least four cell groups 30 (first cell group) are each constituted by electrically connecting in series two solar battery cells A, and every at least two of said at least four cell groups 30 are electrically connected in parallel with each other to constitute at least two cell groups 31 (second cell group). Next, said at least two cell groups 31 are electrically connected in series with each other to constitute the solar battery module 22.
In the solar battery module 22, all of the solar battery cells A are in a matrix disposition. In the matrix, each row includes at least two cell groups 31, and each column includes at least two cell groups 31.
With the above configuration, even in a case where a part of the solar battery module 22 becomes shaded and only one row or one column fully receives sunlight, at least two cell groups 31 are included in the row or the column fully receiving sunlight. Accordingly, there is not a single cell group 31 which does not receive any sunlight. As a result, it is possible to provide a solar battery module able to achieve a stable energy supply without a considerable decrease in electric power generation efficiency even when partially shaded.
Following is an explanation of another embodiment of the present invention, with reference to
A schematic view of an internal circuit of the conventional solar battery module 108 is shown in
A schematic view of an internal circuit of the solar battery module 10 in accordance with the present embodiment is shown in
As shown in (b) of
In contrast, as shown in (b) of
Accordingly, in the solar battery module 10 in accordance with Embodiment 2, there is no such considerable decrease of the amount of generated electric power as in the case of the conventional solar battery module 108, even when a part of the solar battery module 10 is shaded, and it is possible to achieve a stable electric power supply.
Reference sign 2′ indicates where the solar battery cell 2 is disposed. Further, it is possible to simplify a routing process of the pattern 9 by forming a through-hole in the module substrate 5, and by providing at least two layers of wiring on the module substrate 5. Further, a more complex disposition of the solar battery cells becomes possible.
Following is an explanation of yet another embodiment of the present invention, with reference to
With all of the above solar battery modules in accordance with the present invention, there is no such considerable decrease of the amount of generated electric power as in the case of conventional solar battery modules, even when a part of the above solar battery modules in accordance with the present invention, is shaded, and it is possible to achieve a stable electric power supply.
It must be noted that the solar battery cells A to F in accordance with Embodiments 1 to 3 constitute cell groups in each embodiment, and are independent in each embodiment. Further, in Embodiments 1 to 3, each cell group is constituted by electrically connecting in parallel at least two solar battery cells. However, as explained above regarding Embodiment 1 in (a) and (b) of
An electronic component in accordance with the present invention, an electric component in accordance with the present invention, and an electronic apparatus in accordance with the present invention are either provided with any of the above solar battery modules or supplied with electric power from any of the above solar battery modules. Accordingly, the electronic component in accordance with the present invention, the electric component in accordance with the present invention, and the electronic apparatus in accordance with the present invention make it possible to achieve a stable energy supply without a considerable decrease in electric power generation efficiency even when the solar battery module is partially shaded.
The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the following claims. Different embodiments obtained by combining disclosed technical means as appropriate are also included within the technical scope of the present invention.
The present invention makes it possible to achieve a stable energy supply without a considerable decrease in electric power generation efficiency even when partially shaded. Accordingly, the present invention can be suitably used in solar battery modules and optical electric power generating systems generating electric power from light such as sunlight and the like, as well as in electronic components, electric components and electronic apparatuses on which such solar battery modules and/or optical electric power generating systems are mounted.
Number | Date | Country | Kind |
---|---|---|---|
2009-141597 | Jun 2009 | JP | national |