Solar battery module and manufacturing method thereof
A solar battery module includes: a plurality of solar battery cells, a plain shape of each being a substantial rectangle, and a ratio of a short side length and a long side length of the substantial rectangle being 1/n:1 (n is an integer equal to or larger than 2), includes a plurality of light-receiving-surface bus electrodes parallel to the short side of the substantial rectangle on a light receiving surface, and includes rear-surface bus electrodes each at a position on a non-light-receiving surface corresponding to each of the light-receiving-surface bus electrodes; and a light-receiving-surface lead (an interconnector) that electrically connects the light-receiving-surface bus electrodes of one of the solar battery cells to the rear-surface bus electrodes of adjacent one of the solar battery cells.
1. A solar battery module comprising:
a plurality of solar battery cells, a plain shape of each being a substantial rectangle, and a ratio of a short side length and a long side length of the substantial rectangle being 1/n:1 (n is an integer equal to or larger than 2), includes a plurality of light-receiving-surface bus electrodes parallel to the short side of the substantial rectangle on a light receiving surface, and includes rear-surface bus electrodes each at a position on a non-light-receiving surface corresponding to each of the light-receiving-surface bus electrodes; and
an interconnector that electrically connects the light-receiving-surface bus electrodes of a first one of the solar battery cells to the rear-surface bus electrodes of an adjacent second one of the solar battery cells, wherein a predetermined number of the solar battery cells are serially connected to each other, thereby configuring a cell string, n columns of the cell strings are connected in parallel by a first string connector at one end of the n columns, the n in the number of columns of the cell strings connected in parallel being equal to the n in the ratio of the long side length to the short side length, and the n-column parallel-connected cell strings are further serially connected to another n-column parallel-connected cell strings by a second string connector at an opposite end of the n columns, thereby configuring an entire cell array.
2. The solar battery module according to claim 1 , wherein a predetermined number of the solar battery cells are serially connected, thereby configuring a cell string, two columns of the cell strings are connected in parallel, and the two-column parallel-connected cell strings are further serially connected, thereby configuring an entire cell array.
3. The solar battery module according to claim 1 , wherein the light-receiving-surface bus electrodes of each solar battery cell are formed at positions that are line-symmetrical with respect to a line passing through a middle point of a side perpendicular to an extended line of the light-receiving-surface bus electrodes and parallel to the light-receiving-surface bus electrodes.
4. The solar battery module according to claim 1 , wherein the light-receiving-surface bus electrodes of each solar battery cell are formed at positions that are line-symmetrical with respect to a line passing through a middle point of a side parallel to the light-receiving-surface bus electrodes and perpendicular to the light-receiving-surface bus electrodes.
5. The solar battery module according to claim 1 , wherein each of the solar battery cells includes an area where the light-receiving-surface bus electrodes and the rear-surface bus electrodes are not formed within a predetermined dimension from an edge toward a central direction of the cell at an outer circumferential edge portion thereof.
6. The solar battery module according to claim 1 , which is obtained by dividing a basic solar battery cell with a plane shape thereof being a substantial square, which includes n light-receiving-surface electrode areas in each of which a plurality of light-receiving-surface bus electrodes parallel to a side of the substantial square and a plurality of grid electrodes perpendicular to the light-receiving-surface bus electrodes are provided on a light-receiving surface side and includes rear-surface bus electrodes each at a position on a non-light-receiving surface side corresponding to each of the light-receiving-surface bus electrodes into n respective boundaries of the n light-receiving-surface electrode areas.
7. The solar battery module according to claim 1 , wherein the second string connector extends continuously across the entire cell array.
8. The solar battery module according to claim 1 , wherein the interconnector is joined to the light-receiving-surface bus electrode of a solar battery cell nearest to the second string connector of the n-column parallel-connected cell strings, and is connected to the second string connector, and the second string connector is connected to a rear surface lead at the rear-surface bus electrode of a head solar battery cell nearest the second string connector of the another n-column parallel-connected cell strings.
9. The solar battery module according to claim 1 ,
wherein long sides of the substantial rectangle include a first long side and a second long side,
the substantial rectangle has chamfered corners on both ends of only the first long side such that the second long side is without chamfered corners, and
wherein the first one of the solar battery cells and the second one of the solar battery cells are arranged in the cell array such that the first long side and the second long side of the first one and the second one of the solar battery cells do not face each other.
10. A solar battery module comprising:
a plurality of solar battery cells, a plain shape of each being a substantial rectangle, and a ratio of a short side length and a long side length of the substantial rectangle being 1/n:1 (n is an integer equal to or larger than 2), includes a plurality of light-receiving-surface bus electrodes parallel to the short side of the substantial rectangle on a light receiving surface, and includes rear-surface bus electrodes each at a position on a non-light-receiving surface corresponding to each of the light-receiving-surface bus electrodes; and
an interconnector that electrically connects the light-receiving-surface bus electrodes of a first one of the solar battery cells to the rear-surface bus electrodes of an adjacent second one of the solar battery cells, wherein
long sides of the substantial rectangle include a first long side and a second long side,
the substantial rectangle has chamfered corners on both ends of only the first long side such that the second long side is without chamfered corners, and
the first one of the solar battery cells and the second one of the solar battery cells are arranged in the module such that the first long side and the second long side of the first one and the second one of the solar battery cells do not face each other.
11. The solar battery module according to claim 1 , wherein the solar battery cells in the cell array are arranged so that the short side lengths are parallel to the extension of the n-column parallel-connected cell strings.