TWI572133B - Solar cell module array with notch for wire collection and solar cell module thereof - Google Patents

Description

Concave edge line solar cell module array and concave edge line solar power Pool module

The present invention relates to a recessed-walled solar cell module and a recessed-collective solar cell module array thereof, and more particularly to a collecting space formed by an insulating unit, a line-collecting area and a second side-side concave edge. The bus bar extends to the recessed-collective solar cell module on the outer side of the second substrate and the array of recessed-collective solar cell modules.

Generally, a solar cell module is generally constructed by encapsulating a solar cell in the upper two layers of the glass substrate, thereby protecting the solar cell from the moisture of the external environment and receiving the solar beam through the transparent glass substrate. . In addition, a wire box is further disposed on the outer layer of the glass substrate for collecting electric power generated by the plurality of solar cells, and in order to guide the power of the solar cell, the existing method mainly perforates the glass substrate to make the confluence power The wires can be connected to the junction box via perforations.

Please refer to the first figure and the second figure. The first figure shows a schematic diagram of a solar cell in the prior art; the second figure shows an enlarged view of A in the first figure. As shown, a solar cell module PA100 includes two glass substrates PA1 (only one is shown), a plurality of solar cells PA2, and four bus bars PA3. Wherein, the solar cell PA2 is sandwiched between the two glass substrates PA1, and one of the two glass substrates PA1 is provided with two to four perforations PA11 (Fig. Only one is indicated in the middle, and the bus bar PA3 is electrically connected to the plurality of solar cells PA2, and is respectively pierced by two to four perforations PA11, and electrically connected to a junction box (not shown), thereby making use. The power generated by the solar cell PA2 can be applied through the junction box.

As described above, in the prior art, although the bus bar PA3 can pass through the perforation PA11 of the glass substrate PA1 to the surface of the glass substrate PA1 and is connected to the junction box, the glass substrate PA1 is often very in the manufacturing process. It is easy to cause damage due to the drilling process of the perforated PA11, or the solar cell module PA100 is heated by long-term exposure to sunlight during actual use, causing the glass substrate PA1 to be thermally expanded to cause cracking at the perforated PA11 and to accelerate the solar cell module. The problem that the components of the solar cell are aging, and the maximum power of the solar cell is declining as the temperature increases. Therefore, in the prior art, the operating temperature of the solar cell is often reduced by adding heat sink fins or heat pipes behind the solar module. However, since the conventional additional heat sink is only suitable for a single-sided light-receiving solar cell module, the shading condition cannot be avoided when applied to a double-sided solar cell module, and the additional heat sink increases the cost of the solar cell module. And weight, therefore need a light weight and can be applied to single-sided light or double-sided The heat dissipation structure of the solar cell module of the.

In view of the prior art, the existing solar cells are mainly perforated on the glass substrate, and the bus bar extends through the through holes to the junction box disposed on the outer surface of the glass substrate, so that the junction box can effectively collect the solar cell. Electricity; however, when manufacturing a glass substrate, it is easy to reimburse the entire glass substrate due to failure of the perforation of the perforation, thereby increasing the manufacturing cost of the solar cell. In addition, since the solar cell is usually exposed to the sun for a long time, the temperature of the solar cell is also easily increased, at this time, the glass substrate There is a possibility that cracks may occur at the perforations due to the expansion relationship, causing damage to the entire solar cell and a problem that the power generation efficiency decreases as the temperature rises.

In view of the above, the present invention provides a recessed-gated solar cell module for solving the problems of the prior art, and includes a first substrate, a plurality of solar cells, a plurality of bus bars, and a second a substrate, an insulating unit, and a junction box. The first substrate has a first substrate inner side surface and a first side edge concave edge. A plurality of solar cells are disposed on an inner side surface of the first substrate. A plurality of bus bars are electrically connected to the solar cells and extend toward the first side concave edge. The second substrate has a second substrate outer side surface and a second side edge concave edge, and the solar cells are commonly sandwiched with the first substrate, the second side edge concave edge corresponding to the first side edge concave edge And the inner side surface of the first substrate exposes a concentrating area between the first side concave edge and the second side concave edge. The insulating unit is disposed on the concentrating area corresponding to the second side edge, the insulating unit, the second side concave edge and the concentrating area enclosing a line space, and the junction box is disposed in the second The bus bar extends toward the outer surface of the second substrate via the assembly space and is electrically connected to the junction box.

An auxiliary technical means derived from the above-mentioned necessary technical means is that the junction box is further disposed on the line space.

An auxiliary technical means derived from the above-mentioned technical means is that an adhesive layer for bonding the junction box and the outer side surface of the second substrate is further disposed between the junction box and the outer side surface of the second substrate.

An auxiliary technical means derived from the above-mentioned necessary technical means is that the junction box is more fixed to the insulating unit. Preferably, an adhesive layer is further disposed between the junction box and the insulating unit, so that the junction box is fixed to the insulating unit.

An auxiliary technical means derived from the above-mentioned necessary technical means is that the insulating unit is integrally formed from the junction box.

An auxiliary technical means derived from the above-mentioned technical means is that a filling material is further filled between the first substrate and the second substrate, and the packaging material is used to encapsulate the solar cells on the first substrate and the first Between the two substrates. Preferably, the encapsulating material has a third side concave edge corresponding to the second side concave edge. In addition, the encapsulating material is more coverly disposed on the gathering area and the second side concave edge, and covers and fixes the bus bars.

An auxiliary technical means derived from the above-mentioned technical means is that the shape of the first side concave edge comprises a rectangle, an ellipse, a circle, a triangle, a semicircle or a combination thereof.

An auxiliary technical means derived from the above-mentioned technical means is that the shape of the second side concave edge comprises a rectangle, an ellipse, a circle, a triangle, a semicircle or a combination thereof.

An auxiliary technical means derived from the above-mentioned technical means is that the first side concave edge is plural, the second side concave edge is plural, and the first side concave edges are at least One of them corresponds completely to at least one of the second side concave edges.

Another necessary technical means for solving the problems of the prior art is to provide a recessed-walled solar cell module array comprising a plurality of recessed-collective solar cell modules as described above, the recesses The line-type solar cell module is adjacently connected to each other, the first side edge of the one of the recessed-collective solar cell modules, and the insulating unit and the recessed-collective solar cell module The edge of another adjacent one of them forms a heat dissipation channel.

As described above, the recessed-edge solar cell module of the present invention mainly forms a line-collecting region on the inner side surface of the first substrate through the first side concave edge and the second side concave edge, and is disposed in the collecting region through the insulating unit. And forming a line space, so that the bus bar can extend to the outer side surface of the second substrate via the line space, and then electrically connected to the junction box; compared with the prior art, a perforation is formed on the glass substrate, so that the bus bar passes through the through hole The glass substrate is connected to the junction box, and the present invention utilizes the difference in the size of the concave edges of the two glass substrates to form a concentrating area, and thus can be disposed and formed by the insulating unit. The bus bar can pass through the collecting space. Therefore, the glass substrate can be easily damaged, and when the glass substrate expands due to heat, cracks are not easily generated, and the service life of the recessed-wall solar battery module is effectively increased. And improve the manufacturing yield.

The specific embodiments of the present invention will be further described by the following examples and drawings.

PA100‧‧‧ solar battery

PA1‧‧‧ glass substrate

PA11‧‧‧ perforation

PA2‧‧‧ solar battery

PA3‧‧‧ bus bar

100‧‧‧ concave edge line solar module

100'‧‧‧ concave edge line solar module

1‧‧‧First substrate

11‧‧‧The inner side of the first substrate

111‧‧‧Set line area

12a, 12b, 12c, 12d‧‧‧ first side

121a, 121b, 121c, 121d‧‧‧ first side concave edge

2‧‧‧Solar battery

3‧‧‧ bus bar

4‧‧‧second substrate

41‧‧‧The inner side of the second substrate

42‧‧‧The outer side of the second substrate

43a, 43b, 43c, 43d‧‧‧ second side

431a, 431b, 431b', 431c, 431d‧‧‧ second side concave edge

5‧‧‧Packaging materials

51a‧‧‧ Third side concave edge

6‧‧‧Insulation unit

61‧‧‧Packaging materials

7‧‧‧Adhesive layer

8‧‧‧Set box

200‧‧‧ concave edge line solar module array

Hd‧‧‧heating channel

The first figure shows a schematic plan view of a solar cell module of the prior art; the second figure shows an enlarged view of A of the first figure; the third figure shows the concave-gated line solar cell mode provided by the preferred embodiment of the present invention. FIG. 4 is a perspective exploded view showing a recessed-collective solar cell module according to a preferred embodiment of the present invention; and a fifth perspective view showing a solar cell and a bus bar disposed on the first substrate; 6 is a perspective view showing the second substrate and the encapsulating material encapsulating the solar cell between the first substrate and the second substrate; the seventh drawing is a three-dimensional schematic view showing that the junction box is disposed on the outer side of the second substrate; 3 is a schematic view of a BB cross-section of a third embodiment; and a ninth drawing is a perspective view of an array of recessed-collective solar cell modules provided by another preferred embodiment of the present invention.

Please refer to the third and fourth figures. The third figure shows a perspective view of a recessed-collective solar cell module according to a preferred embodiment of the present invention. The fourth figure shows the preferred embodiment of the present invention. A three-dimensional exploded view of a recessed-collective solar cell module. As shown, a recessed-wall solar cell module 100 includes a first substrate 1, a plurality of solar cells 2 (only one is shown), a plurality of bus bars 3 (only one is shown), and a first The second substrate 4, an encapsulating material 5, an insulating unit 6, an adhesive layer 7, and a junction box 8.

The first substrate 1 has a first substrate inner side surface 11, a first substrate outer side surface (not shown) with respect to the first substrate inner side surface 11 and four first side edges 12a, 12b, 12c and 12d, first The side edges 12a, 12b, 12c, and 12d are disposed opposite to each other on the inner side surface 11 of the first substrate, and the first side edge 12a defines a first side concave edge 121a, and the first side edge 12b defines a first side edge 12b. The first side edge 12c defines a first side edge 121c, and the first side edge 12d defines a first side edge 121d, wherein the first side edge 121a and the first side edge The concave edges 121b are symmetrically disposed, and the first side concave edges 121c are symmetrically disposed with the first side concave edges 121d. The first side concave edges 121a, 121b, 121c, and 121d are semicircular in this embodiment, but are not limited thereto, and may be rectangular, elliptical, circular, triangular, or a combination thereof in other embodiments. .

A plurality of solar cells 2 are disposed on the inner side surface 11 of the first substrate.

A plurality of ribbons 3 are electrically connected to the solar cell 2 for collecting the electric power generated by the solar cell 2 and extending toward the first side concave edge 121a; in the embodiment, the plurality of solar cells 2 Connected to each other in a conventional manner, such as connecting the adjacent solar cells 2 through a Bus Ribbon, and the solar cells 2 and the bus bars 3 are electrically connected by wires, such as a main grid. The bus bar extends to the outside of the solar cell 2 and is connected to the bus bar 3 (not shown). However, those skilled in the art should understand the electrical connection between the solar cell 2 and the bus bar 3.

The second substrate 4 has a second substrate inner side surface 41, a second substrate outer side surface 42 and four second side edges 43a, 43b, 43c and 43d. The second substrate inner side surface 41 faces the first substrate inner side surface 11, and the second substrate inner side surface 41 and the second substrate outer side surface 42 are oppositely disposed, and the second side edges 43a, 43b, 43c and 43d are opposite to each other. The second side edge 43a defines a second side edge 431a, and the second side edge 43b defines a second side edge 431b. The second side edge 43c defines a second side concave edge 431c, and the second side edge 43d defines a second side concave edge 431d, wherein the second side concave edge 431a and the second side concave edge 431b are symmetrically disposed. And the second side concave edge 431c and the second side concave edge 431d are symmetrically disposed. In addition, the second side concave edges 431a, 431b, 431c, and 431d are semi-circular in this embodiment, but may be rectangular, elliptical, circular, triangular, or a combination thereof in other embodiments.

As described above, the second substrate 4 and the first substrate 1 are co-shielded with the solar cell 2, so that the second side concave edges 431a, 431b, 431c and 431d respectively correspond to the first side concave edges 121a, 121b, 121c and 121d, furthermore, a first substrate inner side surface 11 is exposed between the first side edge 121a and the second side edge 431a (shown in FIG. 6), in this embodiment. Since the first side concave edge 121a and the second side concave edge 431a are both semicircular, the second side concave edge 431a is a semicircular shape having a concave area larger than the first side concave edge 121a, thereby forming a collecting line. The area 111, however, is not limited thereto in other embodiments, and the first side concave edge 121a and the second side concave edge 431a may be the same shape or different shapes as long as the line area 111 can be formed, and when the first When the side concave edge 121a and the second side concave edge 431a are the same shape of the concave edge, the second side concave edge 431a has a larger recessed area than the first side concave edge 431a. It can be seen that the first substrate 1 and the second substrate 4 of the present invention have straight and aligned sides, and at least one semi-circular concave edge whose side edges are not aligned (one in this embodiment, that is, the first side) Edge concave edge 121a and second side concave edge 431a) and a plurality of sides The aligned semi-circular recesses (three in this embodiment) are used to form the recessed-collective solar cell module 100 of the present invention.

The encapsulating material 5 is filled between the first substrate 1 and the second substrate 4, and the solar cell 2 is encapsulated between the first substrate 1 and the second substrate 4. Wherein, the encapsulating material 5 has four third side concave edges 51a (only one is shown), and the four third side concave edges 51a correspond to the second side concave edges 431a, 431b, 431c and 431d, respectively. . In this embodiment, the encapsulating material 5 is a transparent insulating resin, such as Ethylene Vinyl Acetate (EVA), but is not limited thereto, and the encapsulating material 5, such as EVA, has fluidity after being heated, and thus is heated. The pre-lamination EVA may be disposed between the solar cell 2 and the first substrate 1, or may be disposed between the solar cell 2 and the second substrate 4. After the heating and laminating steps, the EVA is melted, and after being cooled and solidified, The solar cell 2 can be packaged.

The insulating unit 6 is disposed on the concentrating area 111 corresponding to the second side concave edge 431a, so that the insulating unit 6, the second side concave 431a and the concentrating area 111 form a line space (not shown). The bus bar 3 extends through the line space to the second substrate outer side 42. The assembly space is further filled with a sealing material 61 after the bus bar 3 is disposed, that is, the encapsulation material 61 is disposed on the second side concave edge 431a, and the bus bar 3 is sealed and fixed to the insulation unit 6 and the second side. Between the edge recesses 431a, the bus bars 3 are actually extended from the encapsulation material 61 to the second substrate outer side surface 42. In addition, in other embodiments, the encapsulating material 5 may cover the inner edge of the first side concave edge 121a or cover the first side concave edge 121a and the second side corresponding to the insulating unit 6. On the concave edge 431a, in the present embodiment, the encapsulating material 61 and the encapsulating material 5 are made of the same material, for example, an ethylene vinyl acetate copolymer, but are not limited thereto.

The adhesive layer 7 is disposed on the outer surface 42 of the second substrate, the insulating unit 6 and the encapsulating material 61. The material of the adhesive layer 7 is an insulating colloid, such as Silicone/Polymerized siloxanes, Acrylic base, and Polyurethane (Poly). Urethane), ethylene vinyl acetate copolymer, Epoxy resin, Phenolic resins, melamine resin, polyvinyl acetate adhesive or hot melt ). In other embodiments, the adhesive layer may be used without a bonding layer, such as a locking structure, a snap structure, an adsorption structure, or the like.

The junction box 8 is disposed on the adhesive layer 7, and is fixed to the second substrate outer surface 42, the insulating unit 6 and the encapsulating material 61, and electrically connected to the bus bar 3 passing through the collecting space. Further, in other embodiments, the insulating unit 6 is integrally formed from the junction box 8, that is, the insulating unit 6 is a part of the junction box 8. However, in the present embodiment, most of the junction box 8 is mainly disposed on the outer side surface 42 of the second substrate, and a small portion is disposed on the line space, so that the junction box 8 can span the line space and the insulation unit 6 The connection, such that the bus bar 3 can extend out through the line space and be directly electrically connected to the junction box 8. In addition, in other embodiments, the junction box 8 can be disposed not only on the adhesive layer 7 and the second substrate outer side surface 42, but also on the insulating unit 6 and the second substrate outer side surface 42 across the ground.

Please refer to the fifth to eighth figures. The fifth figure shows a perspective view of the solar cell and the bus bar disposed on the first substrate. The sixth figure shows that the second substrate and the encapsulating material encapsulate the solar cell on the first substrate. A perspective view of the second substrate; a seventh diagram showing a schematic view of the junction box disposed on the outer side of the second substrate; and an eighth diagram showing a BB cross-sectional view of the third diagram. As shown in the figure, the manufacturing process of the recessed-wall solar cell module 100 is first to place the solar cell 2, the bus bar 3, the electrical connection bus bar 3 and the wires of the solar cell 2 on the inner side surface 11 of the first substrate. Then, the encapsulating material 5 and the second substrate 4 are disposed on the first substrate 1 so that the solar cell 2 is sandwiched between the first substrate 1 and the second substrate 4, and the bus bar 3 is exposed in the collecting area. 111, the insulating unit 6 is further disposed in the concentrating area 111, so that the insulating unit 6, the concentrating area 111, the second side concave 431a, and the third side concave edge 51a are arranged to form a line space. The bus bar 3 is exposed to the outer surface 42 of the second substrate via the line space, and finally, the junction box 8 is electrically connected to the bus bar 3, and is fixed to the second substrate 4 and the insulating unit 6 through the adhesive layer 7.

In addition, in practical use, the encapsulating material 61 is more closely disposed between the insulating unit 6 and the line concentrating area 111 (not shown), so that the insulating unit 6 is tightly bonded to the concentrating area 111, in other words, the package. The material 61 is disposed not only between the concentrating area 111 and the second side rim 431a but also in the concentrating area 111 so as to be bonded to the bottom of the insulating unit 6, thereby fixing the insulating unit 6 in close contact with each other. In the line area 111.

As described above, the recessed-wall solar cell module 100 of the present invention forms the line-collecting region 111 on the inner side surface 11 of the first substrate through the first side concave edge 121a and the second side concave edge 431a, and is transmitted through the insulating unit. 6 is disposed in the concentrating area 111 to form a concentrating space, so that the bus bar 3 can extend to the outer side surface 42 of the second substrate via the concentrating space, and is electrically connected to the junction box 8 , so that the concentrating box 8 can effectively collect the solar cell 2 . The generated power; wherein the prior art is that a perforation is formed on the glass substrate, so that the bus bar is connected to the junction box through the perforation through the glass substrate, and thus the glass substrate is easily damaged due to the drilling process of the perforation, or when the solar energy When the temperature of the battery is increased due to long-term exposure to the sun, cracks are generated at the perforations due to the expansion relationship; however, the present invention has the first side concave edge and the first side of the first substrate and the second substrate respectively. The two side concave edges are formed by the difference in shape or area of the first side concave edge and the second side concave edge, so that the insulating unit can be disposed on the collecting line Forming a line space further, and extending the bus bar to the outer side of the second substrate via the line space to be coupled to the junction box; compared to the glass of the present invention having the first side concave edge and the second side concave edge The substrate is not only easy to manufacture, but also has a low cost and is less likely to be damaged than a conventional glass substrate having two or four perforations, and the present invention is not easily cracked when the glass substrate is expanded by heat. The problems existing in the prior art effectively increase the service life of the recessed-collective solar cell module and increase the manufacturing yield.

Please refer to the ninth drawing. FIG. 9 is a perspective view of an array of recessed-collective solar cell modules according to another preferred embodiment of the present invention. As shown, a recessed-collective solar cell array 200 includes two recessed-collective solar cell modules 100 and 100', and the recessed-collective solar cell modules 100 and 100' are adjacent to each other. The first side edge concave edge of the recessed-wall solar cell module 100 and the insulating unit 6 are the first side concave edge and the second side concave edge of the concave-edge current-collecting solar battery module 100 ′. 431b' surrounds a heat dissipation channel hd. In order to improve the sealing property of the side edge concave edge, preferably, a sealing unit may be added to cover the corresponding first side edge concave edge and the second side edge concave edge inner edge, or cover the corresponding first a side edge concave edge and the second side edge concave edge. The sealing unit material is, for example, a thermoplastic resin: such as Acrylic base, Polyamide, Polystyrene, Rubber, Polyolefin, Ethylene- Vinyl acetate copolymer (EVA) and its derivatives, etc.; thermosetting resins such as polyurethane, phenolic resin, epoxy resin, silicone sealing material and derivatives thereof. The best one is: Butyl rubber; the second best is: silicone, Epoxy, Acrylic pressure sensitive adhesive.

As described above, the recessed-wall solar cell module array 200 of the present invention forms a heat dissipation channel hd with the edge of the other recessed-wall solar cell module 100' through the first side concave edge 121a and the insulating unit 6. Therefore, when the recessed-edge solar cell module array 200 is disposed on the roof, the heat dissipation channel hd of the recessed-collective solar cell array 200 can accumulate the recessed-collective solar cell array 200 and the roof. The hot air can be discharged through the heat dissipation channel hd to form a heat dissipation cycle, which can effectively reduce the temperature of the solar cell modules 100 and 100' during power generation, and the recessed-collective solar cell module of the present invention does not require additional heat dissipation. The device, and the sides of the recessed-wire solar cell module of the present invention still maintain a majority of straight sides, and at least one of the side edges is provided with at least one concave edge, which does not reduce the entire edge of the single substrate. Therefore, the technology of the present invention can be applied to a conventional single-sided light-receiving or double-sided light-receiving solar cell module without changing the overall size of the module without any other external structural improvement, so that the heat dissipation effect is Reduce the weight of the solar cell module.

The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed.

100‧‧‧ concave edge line solar module

1‧‧‧First substrate

4‧‧‧second substrate

5‧‧‧Packaging materials

6‧‧‧Insulation unit

7‧‧‧Adhesive layer

8‧‧‧Set box

Claims (13)

A recessed-walled solar cell module comprising: a first substrate having a first substrate inner side surface and a first side edge concave edge; a plurality of solar cells disposed on an inner side surface of the first substrate; a plurality of bus bars electrically connected to the solar cells and extending toward the first side concave edge; a second substrate having a second substrate outer side surface and a second side edge concave edge The first substrate collectively sandwiches the solar cells, the second side concave edge corresponds to the first side concave edge, and the first substrate inner side surface is at the first side edge concave edge and the second side edge An insulating unit is disposed between the concave edges; an insulating unit is disposed on the collecting portion corresponding to the second side concave edge, and the insulating unit, the second side concave edge and the collecting line structure are And a concentrating box is disposed on the outer side of the second substrate, and the bus bars extend toward the outer surface of the second substrate via the collecting space and are electrically connected to the junction box. The recessed-collective solar cell module of claim 1, wherein the junction box is further disposed on the line space. The recessed-wire solar cell module of claim 1, wherein the junction box and the outer surface of the second substrate are further provided with a bonding box and an outer surface of the second substrate. Adhesive layer. The recessed-walled solar cell module of claim 1, wherein the junction box is further fixed to the insulating unit. The recessed-wire solar cell module of claim 4, wherein an adhesive layer is further disposed between the junction box and the insulating unit, so that the junction box is fixed to the insulating unit. The recessed-walled solar cell module according to claim 1, wherein the insulating unit is integrally formed from the junction box. The recessed-wire solar cell module of claim 1, wherein the first substrate and the second substrate are further filled with a packaging material, and the packaging material is used for packaging the solar cells. Between the first substrate and the second substrate. The recessed-wire solar cell module of claim 7, wherein the encapsulating material has a third side concave edge corresponding to the second side concave edge. The recessed-gated solar cell module according to claim 7, wherein the encapsulating material is more coverly disposed on the collecting portion and the second side concave edge, and covers and fixes the confluence article. The recessed-walled solar cell module of claim 1, wherein the shape of the first side concave edge comprises a rectangle, an ellipse, a circle, a triangle, a semicircle or a combination thereof. The recessed-wire solar cell module of claim 1, wherein the shape of the second side concave edge comprises a rectangle, an ellipse, a circle, a triangle, a semicircle or a combination thereof. The recessed-edge solar cell module of claim 1, wherein the first side concave edge is plural, the second side concave edge is plural, and the first At least one of the side recesses corresponds exactly to at least one of the second side recesses. A recessed-collective solar cell module array comprising: A plurality of recessed-collective solar cell modules according to claim 1, wherein the recessed-collective solar cell modules are adjacently connected to each other to make the recessed-collective solar cell modules The first side edge of the recess and the insulating unit and the edge of the other adjacent one of the recessed-collective solar cell modules define a heat dissipation channel.