KR101620433B1

KR101620433B1 - Photovoltaic module

Info

Publication number: KR101620433B1
Application number: KR1020100048040A
Authority: KR
Inventors: 홍종경; 김종대
Original assignee: 엘지전자 주식회사
Priority date: 2010-05-24
Filing date: 2010-05-24
Publication date: 2016-05-12
Also published as: KR20110128534A

Abstract

The present invention relates to a solar module. A solar module according to the present invention includes a solar module main body including a plurality of solar cells, a junction box located on one side of the solar module main body, and a heat radiating pad positioned between the solar module main body and the junction box. Thereby, the heat generated in the junction box is prevented from being transferred to the solar cell, so that the efficiency of the solar module can be prevented from lowering.

Description

{PHOTOVOLTAIC MODULE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar module, and more particularly, to a solar module including a heat dissipation pad positioned between the solar module main body and the junction box.

With the recent depletion of existing energy sources such as oil and coal, interest in alternative energy to replace them is increasing. Among them, solar cells are attracting attention as a next-generation battery that converts solar energy directly into electrical energy using semiconductor devices.

Meanwhile, the photovoltaic module means that the solar cells for solar power generation are connected in series or parallel, and the photovoltaic module includes a junction box for collecting the electricity produced by the solar cell and controlling the backward flow of the electricity can do.

However, since the junction box generates heat and the generated heat can raise the temperature of the solar cell at the junction point attachment point, the output of a specific solar cell whose temperature has risen among several solar cells connected in series or in parallel Can be lowered.

In general, when a solar cell is connected in series, if the output is mixed with another solar cell, the total current is adjusted to the lower current, and when the parallel connection is performed under the same conditions, the entire voltage is adjusted to the lower voltage. Therefore, when a hot spot phenomenon occurs in a certain solar cell among several solar cells connected, the efficiency of the solar module may be lowered.

It is an object of the present invention to provide a solar module capable of preventing heat generated in a junction box from being transmitted to a solar cell.

According to an aspect of the present invention, there is provided a solar module including: a solar module main body including a plurality of solar cells; a junction box located on one side of the solar module main body; And a heat dissipation pad.

The area of the heat radiating pad is equal to or larger than the area of the junction box and equal to or smaller than the area of the solar module main body.

Further, the junction box includes a diode, and the heat-radiating pad includes a thermal diffusion layer corresponding to the position of the diode.

According to the present invention, the efficiency of the solar module can be prevented from being lowered by including the heat dissipation pad located between the solar module main body and the junction box.

1 is an exploded perspective view of a solar module according to an embodiment of the present invention.
FIG. 2A is a perspective view showing a rear surface of the solar module of FIG. 1, and FIG. 2B is a sectional view taken along line AA 'of FIG. 2A.
3 is a perspective view illustrating a rear surface of a solar module according to an embodiment of the present invention.
4 is a perspective view illustrating a back surface of a solar module according to an exemplary embodiment of the present invention.

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

1 is an exploded perspective view of a solar module according to an embodiment of the present invention.

1, a solar module 100 according to the present invention includes a solar module main body 101, a junction box 160 located on one side of the solar module main body 101, and a solar module main body 101, And a heat radiating pad 170 positioned between the junction box 160 and the junction box 160.

The solar module main body 101 includes a plurality of solar cells 130 connected in series or parallel by the electrode patterns 132 to convert solar energy into electrical energy.

The solar cell 130 may be a silicon solar cell, a compound semiconductor solar cell, or a tandem solar cell.

The electrode pattern 132 electrically connects the plurality of solar cells 130 and is used as a path through which a current generated by the plurality of solar cells 130 flows. Therefore, a material coated with silver or tin lead in copper Can be used.

1, the solar module main body 101 includes a first EVA 120 film positioned on the lower surface of the plurality of solar cells 130, 2 EVA film 140, a back sheet 110 positioned on the lower surface of the first EVA film 120, and a glass 150 positioned on the upper surface of the second EVA film 140.

First, the backsheet 110 is waterproof, insulating, and ultraviolet shielding, and may be TPT (Tedlar / PET / Tedlar) type, but is not limited thereto. 1, the back sheet 110 may be formed in various shapes such as a circular shape and a semicircular shape depending on the environment in which the solar cell module 100 is installed, although the back sheet 110 is shown as a rectangular shape.

The first EVA film 120 may be formed to have the same size as the back sheet 110 on the back sheet 110 and the plurality of solar cells 130 may be formed on the first EVA film 120, They can be positioned next to each other to form a row.

The electrode pattern 132 may be attached to the solar cell 130 such that two lines are attached to the upper and lower portions of the solar cell 130 and two lines are attached to the respective columns .

The second EVA film 140 may be positioned on the solar cell 130 and may be laminated with the first EVA film 120.

Here, the first EVA 120 film and the second EVA film 140 allow each element of the solar cell to chemically bond. The first EVA film 120 and the second EVA film 140 are made of ethylene vinyl acetate resin excellent in transparency, buffering property, elasticity and tensile strength.

On the other hand, the glass 150 is positioned on the second EVA film 140 so as to transmit sunlight, and is preferably made of tempered glass to protect the solar cell 130 from an external impact or the like. Further, it is more preferable to use a low-iron-content tempered glass containing a small amount of iron in order to prevent the reflection of sunlight and increase the transmittance of sunlight.

The junction box 160 may be located on one side of the solar module main body 101 and may include a capacitor for charging and discharging electric energy generated from the solar cell 130 and a diode for preventing electricity from flowing backward.

An opening 162 is formed in the junction box 160 so that a condenser, a diode, and the like can be connected to the electrode pattern 132.

On the other hand, in operation of the junction box 160, a high temperature is generated from the diode, and the generated heat can reduce the efficiency of the specific solar cell 130 arranged at the position where the junction box 160 is attached.

Accordingly, to prevent this, the solar module 100 according to the present invention may include a heat radiation pad 170 positioned between the solar module main body 101 and the junction box 160.

The heat dissipation pad 170 can spread heat generated in the diode or the like located inside the junction box 160 widely and prevent the temperature of the solar cell 130 located at the corresponding portion from rising.

Therefore, the heat dissipation pad 170 is preferably made of a metal material such as gold (Au), silver (Ag), copper (Cu), aluminum (Al), tungsten It is more preferable to be formed of aluminum (Al).

A hole 172 may be formed in the heat dissipation pad 170 so that the electrode pattern 132 may be connected to the capacitor or the like.

It is preferable that the hole 172 formed has a minimum area in order to maximize the thermal diffusion effect of the heat dissipation pad 170. The area of the hole 172 formed in the heat dissipation pad 170 is preferably set to be a constant value, Is smaller than the area of the opening (162) formed in the opening (160). The width of the hole 172 formed in the heat radiating pad 170 may be the same as the cross sectional area of the electrode pattern 132 penetrating the heat radiating pad 170. [

The heat radiating pad 170 may be integrally formed with the junction box 160, or may be separately formed from the junction box 160 and then attached thereto with an adhesive.

On the other hand, an external connection terminal 163 may be formed on one side of the junction box 160.

FIG. 2A is a perspective view showing a rear surface of the solar module of FIG. 1, and FIG. 2B is a cross-sectional view taken along line A-A 'of FIG. 2A.

The solar module main body 101, the junction box 160, and the heat dissipation pad 170 are the same as those shown and described in FIG.

2A and 2B, a solar module 100 according to an embodiment of the present invention includes a junction box 160 located on one side of a solar module main body 101, a solar module main body 101, And a heat radiating pad 170 positioned between the junction box 160.

Particularly, the heat dissipation pad 170 can be formed to have the same area as the junction box 160 to which the heat dissipation pad 170 is attached, so that the heat generated from the diode 164 or the like included in the junction box 160 is diffused and concentrated .

2B, the heat generated by the diode 164 located at a specific position of the junction box 160 is transmitted to the solar cell (not shown) attached to the solar cell module main body 101 in the shortest path The heat dissipation pad 170 may include a thermal diffusion layer 174 to correspond to the position of the diode 164.

The thermal diffusion layer 174 is preferably formed of aluminum (Al) or the like and is formed of a material having lower thermal conductivity than the heat radiation pad 170 having an excellent thermal conductivity.

When the thermal diffusion layer 174 having a thermal conductivity lower than that of the heat dissipation pad 170 is formed to correspond to the position where the diode 164 is formed, the heat generated in the diode 164 is absorbed by the solar cell It is possible to prevent diffusion to the left and right sides of the heat dissipation pad 170.

The thermal diffusion layer 174 may be formed by attaching an insulating material or the like to the heat radiating pad 170 and may have a larger area than the diode 164 in order to achieve thermal diffusion to the side of the heat radiating pad 170 .

3 is a perspective view illustrating a rear surface of a solar module according to an embodiment of the present invention.

3, the solar module 200 according to the present invention includes a solar module main body 201, a junction box 260 located on one side of the solar module main body 201, and a solar module main body 201, And a heat dissipation pad 270 positioned between the junction box 260 and the junction box 260.

The photovoltaic module main body 201 and the junction box 260 are the same as those shown and described in Fig. 1, and therefore the description thereof will be omitted below.

The heat dissipation pad 270 positioned between the solar cell module main body 201 and the junction box 260 shown in FIG. 3 may have a larger area than the junction box 260.

When the area of the heat dissipation pad 270 is wider than the area of the junction box 260, the heat transmitted from the junction box 260 can be diffused more widely, so that the temperature of a specific solar cell (not shown) It is possible to more effectively prevent the hot spot phenomenon.

At this time, the area of the heat-radiating pad 270 may be equal to the area of the maximum solar module main body 201. That is, the area of the heat dissipation pad 270 is equal to or larger than the area of the junction box 260 and may be equal to or smaller than the area of the solar module main body 210.

In the case where the area of the heat dissipation pad 270 is larger than the area of the junction box 260, in addition to the effect of spreading the heat generated in the junction box 260, the heat generated by the solar battery (not shown) So that it can be discharged into the atmosphere.

Therefore, the heat radiation effect that can lower the temperature of the solar cell (not shown) can be excellent, and the efficiency of the solar module 200 can be improved.

4 is a perspective view illustrating a back surface of a solar module according to an embodiment of the present invention.

4, when the area of the heat radiating pad 370 is wider than the area of the junction box 360, the junction box 360 is preferably located at the center of the heat radiating pad 370.

That is, when the junction box 360 is positioned at the center of the heat dissipation pad 370, the heat generated in the junction box 360 can be more uniformly diffused when it is transmitted to the heat dissipation pad 370 and spread widely The heat generated in the junction box 360 can be transmitted to the heat radiating pad 370 more effectively.

Accordingly, heat transfer to a specific solar cell (not shown) corresponding to the position of the junction box 360 is blocked, and a specific solar cell (not shown) of a plurality of solar cells (not shown) connected in series or in parallel It is possible to prevent the efficiency from rising due to the temperature from being lowered and to prevent the efficiency of the solar module 300 from being lowered.

It is needless to say that the embodiment shown and described in FIG. 4 may also include the thermal diffusion layer (not shown) shown and described in FIG. 2b.

It is to be understood that the features of the embodiments described above may be applied to other embodiments that are not directly described.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention.

100, 200, 300: solar module 110: back sheet
120: First EVA film 130: Solar cell
132: electrode pattern 140: second EVA film
150: glass 101, 201: photovoltaic module body
160, 260, 360: junction box 170, 270, 370: heat radiation pad

Claims

1. A solar module comprising: a solar module main body including a plurality of solar cells;
A junction box located on one side of the solar module main body; And
And a heat dissipation pad positioned between the solar module main body and the junction box,
The junction box comprising a diode,
Wherein a thermal diffusion layer having a thermal conductivity lower than that of the heat radiation pad is located at a position corresponding to the diode in the heat radiation pad.

The method according to claim 1,
Wherein an area of the heat dissipation pad is equal to or larger than an area of the junction box and equal to or smaller than an area of the solar module main body.

The method according to claim 1,
Wherein an area of the heat dissipation pad is larger than an area of the junction box, and the junction box is located at a center of the heat dissipation pad.

delete

The method according to claim 1,
The plurality of solar cells are connected by an electrode pattern,
Wherein the junction box is formed with an opening to be connected to the electrode pattern, and the heat dissipation pad has a hole through which the electrode pattern passes, wherein the area of the hole is smaller than the area of the opening.

The method according to claim 1,
Wherein the heat radiating pad is made of aluminum.

The method according to claim 1,
In the solar module main body,
A solar cell module including a first EVA film, a second EVA film, a back sheet on the lower surface of the first EVA film, and a glass located on the upper surface of the second EVA film, .