JPS60147150A - Solar battery panel with two-dimensional deployment feature - Google Patents

Abstract

PURPOSE:To realize a two-dimensional folding of a solar battery panel without using hinges or adding stress to the solar cells by a method wherein each panel of a solar battery is provided with a cutout so that there may be no lap at points where lines of folding meet. CONSTITUTION:A panel for a solar battery capable of two-dimensional deployment is provided with a cutout 7. That is, a rhombic region is formed at a point where a first line of folding 5 and second line of folding 6 cross each other at a right angle. Absence of such cutouts 7 creates distortion in the vicinity of the crossing of the two lines of folding, degrading the folding precision, and giving stress to solar cells. Presence of such cutouts 7 eliminates the lap at the point of crossing, which frees the panels from distortion, the solar cells from stress, and ensures a high folding precision. Further, this method eliminates the fear of low reliability attributable to peeling at the junction regions that may otherwise arise.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a two-dimensionally expandable solar cell panel substrate whose structure has been improved in order to two-dimensionally expand and fold the panel without adding stress to the solar cell and with high precision. Regarding.

Most of the conventional expandable solar panels installed on space vehicles such as artificial satellites are folded only in the primary direction when they are launched. However, as satellites and other objects become larger, 11! As a result of the increasing power generated by batteries,
Due to the volume of the launch vehicle, it is necessary to make the storage of solar panels more compact, and a two-dimensional storage/deployment method has been adopted.

FIG. 1 is a schematic diagram showing a one-dimensional developed panel board, and FIG. 2 is a schematic diagram showing a two-dimensional developed panel board, in which (al shows a plan view of each panel board developed, and (bl shows a perspective view of the developing process).

In each figure, 1 is a solar cell panel substrate, and 2 is a fold of the panel substrate.

Springs are used to fold solar panels two-dimensionally.

The thinner it is, like paper, as shown in Figure 2, the more
There is a lot of room for problems to occur, but in panels where solar cells are mounted and a protective material for the cells is mounted on top of the cells, stress is applied near the areas where the folds are subject to gravity, potentially causing the cells to break. In addition, wrinkles are likely to occur in this portion, resulting in poor folding accuracy. For this reason, the panel must be divided into a plurality of sub-panels, connected by hinges, etc., and folded at these parts.

FIG. 3 is a plan view showing the panel configuration by connecting the sub-panels. In the figure, 3 is a sub-panel board, and 4 is a hinge that connects the sub-panel board.

However, in such a configuration, the hinge portion 5 may be made too much,
This has disadvantages in that it takes time and effort to connect the hinge portion and each sub-panel, and that advanced connection technology is required to maintain the reliability of these parts.

An object of the present invention is to eliminate these drawbacks, and to provide a substrate for a solar cell panel that allows two-dimensional folding with high precision without applying stress to the solar cell.

In order to achieve the above object, a two-dimensionally expandable solar cell panel substrate according to the present invention is a solar cell panel substrate that can be two-dimensionally expanded and folded. A notch is provided near the intersection of the first fold and the second fold in a substantially perpendicular direction, so that the JF bend portion from both directions near the intersection that occurs when folded two-dimensionally is removed. Composition/Shide.

According to the above structure, when folded, no abnormal stress is applied, accuracy is improved, and the object of the present invention is completely achieved.

Hereinafter, the present invention will be explained in more detail with reference to the drawings.

FIG. 3 is a developed plan view of a panel showing an embodiment of a two-dimensional developed thick panel substrate according to the present invention. The first fold (horizontal fold) of one thick 1tt pond panel 5
A rhombus-shaped notch 7 is provided at the intersection of the second fold 6 (vertical fold) made perpendicularly to the first fold.

By installing such notches at each intersection, it is possible to prevent the folds from intersecting at all locations on the two panels.
x"o Therefore, the state of each part of the panel substrate is substantially the same as in the case of one-dimensional folding shown in FIG.

If notches are not provided, the area where the folds intersect will be deformed,
Folding accuracy deteriorates. Also, stress is added to the solar cell. However, when the notches are provided, there is no overlapping portion at the intersection of the folds, so the panel substrate does not deform, and no stress is applied to the solar cell. In addition, folding accuracy also improves.

Furthermore, since this is different from the conventional configuration, which requires hinge production and connection to each sub-panel board, there is no risk of deterioration in reliability due to related labor and peeling of connection parts.

In addition, as a method for providing notches, a large number of notches can be provided in one operation by cutting the panel substrate in a folded state and cutting the portions where the folds intersect.

As explained above in detail, the present invention removes the overlapping portion at the intersection of folds by cutting a notch in the solar cell panel substrate, and therefore does not use a hinge or the like.
It also has the advantage of allowing two-dimensional folding without stressing the solar cell.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the one-dimensional development panel board.
is a plan view showing the unfolded state, and fbl is a perspective view showing the unfolding process. FIG. 2 is a schematic diagram of a two-dimensional expandable panel board, with FIG. 2(a) being a plan view showing the expanded state, and FIG. 2(b) being a perspective view showing the expanding process. FIG. 3 is a developed plan view of a panel substrate to which sub-panel substrates are connected, and FIG. 4 is a developed plan view showing an embodiment of a two-dimensionally developed solar cell panel substrate according to the present invention. l... Thick 111' panel board 2... Fold of panel board 3... Sub panel 4...
・Hinges connecting sub-panels 5...First fold 6...Second fold 7...Notch Patent applicant: NEC Corporation Representative, Patent attorney Hisashi Inoro

Claims (1)

[Claims] In a solar cell panel substrate capable of two-dimensional expansion and folding, the intersection of a first fold on the solar cell panel substrate and a second fold in a direction substantially perpendicular to the first fold 1. A substrate for a two-dimensionally expandable solar battery panel, characterized in that a notch is provided near the section so that overlapping sections from both directions near the intersection that occur when folded two-dimensionally are removed.