JPH09148613A - Solar battery module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable visual observation from the outside at the time of abnormality generation, by arranging a light emitting device which emits light by a current flowing in diodes of a solar battery module wherein one or a plurality of solar battery cells are connected in series and one or a plurality of diodes connected in parallel with the cells are arranged. SOLUTION: Solar battery cells 6 are buried and formed in sealing material which is collectively formed on a lower surface of a surface glass 4 and composed of ethylene vinyl acetate. Light emitting devices 3 which are connected in series with bypass diodes 2 are buried in the right side of the cells 6 which are connected in series by TAB. A plurality of solar battery modules 1 are arranged. When abnormality is generated by a trouble, a current flows in the light emitting device 3 and the bypass diode 2 of the module 1 wherein the abnormality is generated, and light emission of the light emitting device 3 can be visually observed from outside.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a solar cell module having a diode for suppressing a decrease in output.

[0002]

2. Description of the Related Art In recent years, the spread of solar cell modules has increased, and in particular, the demand for solar cell modules for medium-scale systems installed outdoors, such as in private houses, is rapidly increasing.

In general, when a solar cell module is used for electric power, a plurality of modules are connected in series to form a block of 200 V or more, and the blocks are connected in parallel to form a solar cell array.

Next, this type of module will be described with reference to FIG. 6 which is a circuit diagram. Reference numeral 1 is a solar cell module, and 2 is a bypass diode connected in parallel with the module 1. When an abnormality occurs in the module 1 due to a failure or a shadow, the output of a block composed of a plurality of modules 1 is reduced. Hold down.

Normally, current flows through a plurality of modules 1 connected in series as shown by solid arrows in FIG. 6, but when an abnormality occurs, for example, when the upper module 1 in FIG. The current from the module 1 on the side does not pass through the module 1 on the upper side, but flows through the bypass diode 2 to the module 1 in the next stage, and suppresses the decrease in the output of the block.

In the above description, the bypass diode 2 is connected in parallel to the module 1, but the same applies to the case where the bypass diode 2 is connected in parallel to the solar battery cell.

[0007]

In the case of the conventional solar cell module described above, when an abnormality occurs due to a failure, it is possible to visually identify from outside the module 1 in the block for repairing. There is a problem that is difficult.

The present invention has been made in consideration of the above points, and when an abnormality occurs due to a failure, it is possible to easily visually identify from the outside which module in the block is defective, and the solar cell can be easily repaired. The purpose is to provide a module.

[0009]

In order to solve the above-mentioned problems, the solar cell module of the present invention has one solar cell unit.
In a solar cell module having one or a plurality of diodes connected in series or in a plurality and connected in parallel with one or a plurality of cells, a light-emitting body or a color change that emits light or changes color by the current flowing through the diodes. It has a body.

Therefore, when an abnormality occurs due to a failure, it is possible to visually confirm the light emission of the light emitting body or the color change of the color changing body from the outside, so that which module in the block is out of order can be easily specified and repair can be easily performed. it can.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments will be described with reference to FIGS. (Mode 1) Mode 1 will be described with reference to FIGS. 1 to 3. First, FIG. 1 showing a circuit diagram is different from FIG. 6 in that a light emitting body 3 made of a light emitting diode is connected in series to a bypass diode 2 and this series circuit is connected in parallel to the solar cell module 1.

Next, the module 1 of FIG. 1 will be described with reference to FIGS. 2A and 2B showing a plan view and a cut front view. In the figure, 4 is a surface glass, 5 is a surface glass 4
An encapsulant made of ethylene vinyl acetate integrally formed on the lower surface of the cell, 6 is a plurality of solar cells embedded in the encapsulant 5, and the cells are connected in series by tabs (not shown). A light-emitting body 3 connected in series with the bypass diode 2 is embedded on the right side of the reference numeral 6. Reference numeral 7 denotes a back film that is attached to the lower surface of the sealant 5, and converts the light energy of sunlight that has passed through the surface glass 4 and the sealant 5 and is incident on the cell 6 into electrical energy.

Then, the bypass diode 2 and the light emitting body 3 are connected at the time of manufacturing the module.

Then, as shown in FIG. 3, a plurality of solar cell modules 1 are installed on the roof 9 of the house 8, and when an abnormality occurs due to a failure, the light emitting body 3 and the bypass diode of the module 1 in which the abnormality has occurred When a current flows through the light source 2, the light emission of the light emitting body 3 can be visually observed from the outside, and the module 1 in which the abnormality has occurred can be specified.

(Mode 2) Next, Mode 2 will be described with reference to FIG. 4 showing a circuit diagram and FIG. 5A, B showing a plan view and a cut-away front view of the solar cell module 1 of FIG.
In these drawings, the same reference numerals as those in FIGS. 1 to 3 indicate the same or corresponding ones, and the different points are as follows.

Reference numeral 10 is a nichrome wire connected in series to the bypass diode 2, and has a length of 120 ° C. at a current of 3 A flowing through the diode 2, and is embedded in the sealant 5. Reference numeral 11 denotes a color-changing body composed of a heat seal that changes its color at 100 ° C. or higher, and is embedded near the position above the nichrome wire 10 of the sealant 5. It should be noted that the solar cell module is 70-70
Since the discoloring body 11 may be overheated to 80 ° C., it is preferable that the discoloring body 11 discolors at 100 ° C. or higher as described above. Further, the length of the nichrome wire 10 may be appropriately adjusted according to the temperature at which the color changing body 11 changes color.

When an abnormality occurs due to a failure,
An electric current flows through the nichrome wire 10 and the bypass diode 2 of the module 1 in which an abnormality has occurred,
When the discolored body 11 discolors due to heat generation at ℃,
The module 1 in which an abnormality has occurred can be specified.

Further, although the light emitting diode is used for the light emitting body 3 in the first embodiment and the heat seal is used for the color changing body 11 in the second embodiment, the invention is not limited to these, and the bypass diode 2 is used.
Any material may be used as long as it emits light or changes color due to the current flowing therethrough.

[0019]

Since the present invention is constructed as described above, it has the following effects. Since the solar cell module 1 of the present invention is provided with the light emitting body 3 or the color changing body 11 that emits light or changes color by the current flowing in the diode 2 connected in parallel to the solar battery cell 6, the light emitting body 3 is generated when an abnormality occurs due to a failure. The emission of light or the color change of the color changing body 11 can be visually confirmed from the outside, which module 1 in the block has a failure can be easily specified, and repair can be easily performed.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a first embodiment of the present invention.

2 is a plan view of the solar cell module of FIG. 1, and B is a cut front view of FIG. 2A.

FIG. 3 is a perspective view of the installation state of FIG.

FIG. 4 is a circuit diagram of a second embodiment of the present invention.

5 is a plan view of the solar cell module of FIG. 4, and B is a cut front view of FIG. 5A.

FIG. 6 is a circuit diagram of a conventional example.

[Explanation of symbols]

 1 Solar cell module 2 Diode 3 Light emitter 6 Solar cell 11 Color change body

Claims (1)

[Claims] 1. A solar cell module having one or a plurality of solar cells connected in series and having one or a plurality of diodes connected in parallel with one or a plurality of the cells, wherein the diode is A solar cell module including a light-emitting body or a color-changing body that emits light or changes color according to a current flowing through the solar cell module.