TWI650871B - Encapsulation material of lamination type solar cell module and method for manufacturing solar cell module - Google Patents

Abstract

A package material for a solar cell module and a method for manufacturing the solar cell module. The package material comprises a plate-like body. The plate-shaped body has a first surface, wherein the first surface comprises at least one regular undulation of a dome shape, the at least one regular undulation extending along the first direction, the first direction being parallel to the first side of the plate-shaped body.

Description

Laminated solar cell module package and solar energy Battery module manufacturing method

The present invention relates to a packaging technology, and in particular to a solar cell module package and a solar cell module manufacturing method.

In the current solar module, the solar cell and the solar cell have a gap of about 2 mm to 3 mm, and the connection between the solar cell and the solar cell is a use of a ribbon. In order to enhance the product price advantage of solar modules, meet customer product order requirements and comply with government policies, solar module manufacturers are not committed to the development of high-efficiency solar modules.

The latest high wattage module technology is a laminated solar module. The laminated solar module does not use a soldering strip to connect the solar cells, but cuts the solar cells into N equal parts, and then slices the solar cells in a stacking manner, and uses metal wires and conductive glue ( Or tape), or a conductive film to connect the upper and lower electrodes of two adjacent solar cell slices. The laminated solar module is designed to save solar cells and solar cells There is a gap between them, and more solar cells can be arranged, so that the solar module can have a higher output wattage.

However, since the laminated solar modules are stacked in series, the strings of the cells are undulating, so that the stress in the overlapping area of the adjacent solar cells is relatively large, so that cracks and even fragments are likely to occur during the lamination of the package. The situation has led to a decline in process yield.

Therefore, an object of the present invention is to provide a solar cell module package and a solar cell module manufacturing method, wherein the inner surface of the package material comprises a wedge-shaped regular undulation corresponding to the laminated battery string, so that the package material can be The laminated battery string provides a relatively uniform support, thereby reducing the chipping or fragmentation probability of the battery string and effectively improving the process yield. In addition, the wedge-shaped regularity of the packaging material has a aligning function, and the laminated battery strings are aligned, whereby the laminated battery strings can be positioned during the lamination process, making them less prone to displacement.

According to the above object of the present invention, a package of a solar cell module is proposed. This package contains a plate-like body. The plate-shaped body has a first surface, wherein the first surface comprises at least one regular undulation of the wedge shape, the at least one regular undulation extending in the first direction, the first direction being parallel to the first side of the plate-shaped body.

According to an embodiment of the invention, the length period of the at least one regular undulation is (L/N-X) mm, L is the side length of the commercial solar cell substrate, N is a positive integer of 1 to 10, and X is 1 to 5.

According to an embodiment of the invention, the width of the at least one regular undulation in the second direction is substantially equal to L.

According to an embodiment of the invention, the number of the at least one regular undulation exceeds one, and the regular undulations are aligned along the second direction.

According to an embodiment of the invention, between the adjacent two regular undulations, the first surface has a raised portion.

According to an embodiment of the invention, the plate-shaped body has a second surface opposite to the first surface, the first surface includes a plurality of inclined faces, and the second surface is a flat surface.

According to an embodiment of the invention, the plate-shaped body has a second surface opposite to the first surface, and the first surface and the second surface each comprise a plurality of inclined faces.

According to an embodiment of the invention, the plate-shaped body comprises a first sub-layer and a second sub-layer stacked on each other, and the materials of the first sub-layer and the second sub-layer are respectively different thermosetting buffer materials or thermoplastic buffer materials.

According to an embodiment of the invention, the first sub-layer is a flat plate, and the second sub-layer comprises a plurality of wedge-shaped structures.

According to an embodiment of the invention, the first sub-layer comprises a plurality of wedge structures.

According to the above object of the present invention, a method of manufacturing a solar cell module is further proposed. In this method, the first outer panel, the first packaging material, the at least one laminated battery string, the second packaging material, and the second outer panel are sequentially stacked, wherein the first packaging material comprises and at least one laminated battery string The first side of the first undulation corresponds to the first surface, and the first side of the at least one laminated battery string corresponds to the undulation of the first surface to be adjacent to the first surface. Performing a heating lamination step to make the aforementioned first outer The board, the first package material, the at least one laminated battery string, the second package material, and the second outer panel are joined to each other.

According to an embodiment of the present invention, when the first outer panel, the first encapsulant, the at least one laminated battery string, the second encapsulant, and the second outer panel are sequentially stacked, the second encapsulant comprises and at least one stack The second side of the battery string undulates corresponding to the second surface, and the second side of the at least one laminated battery string corresponds to the undulation of the second surface to be adjacent to the second surface.

According to an embodiment of the invention, the first outer panel, the first encapsulating material, the at least one laminated battery string, the second encapsulating material and the second outer panel are sequentially stacked from bottom to top.

According to an embodiment of the invention, the number of the at least one laminated battery string exceeds 1, and the first surface comprises a plurality of wedge-shaped regular undulations, and the laminated battery strings are respectively placed on the wedge-shaped regular undulations.

In accordance with an embodiment of the present invention, prior to performing the heat lamination step, the method further includes securing the first encapsulant to the first outer panel.

According to an embodiment of the invention, the undulation of the first surface is partially due to undulation of the first outer panel.

According to an embodiment of the invention, the first package material comprises a first sub-layer and a second sub-layer, and the materials of the first sub-layer and the second sub-layer are respectively different thermosetting buffer materials or thermoplastic buffer materials.

According to an embodiment of the present invention, the first package material has a first sub-layer and a second sub-layer, and the second sub-layer is adjacent to at least one of the stacked battery strings, and the method is further performed before the heating and laminating step is performed. The method comprises fixing the above to at least one of the stacked battery strings.

100‧‧‧Solar battery module

100a‧‧‧Solar battery module

100b‧‧‧Solar battery module

100c‧‧‧Solar battery module

100d‧‧‧Solar battery module

110‧‧‧First outer board

110a‧‧‧ first surface

110b‧‧‧ second surface

111‧‧‧First outer board

111a‧‧‧ first surface

111a’ ‧ ‧ regular ups and downs

111b‧‧‧second surface

120‧‧‧First packaging material

121‧‧‧First packaging material

122‧‧‧ plate body

122a‧‧‧ first surface

122a’ ‧ ‧ regular ups and downs

122b‧‧‧second surface

122p‧‧‧ length period

122s‧‧‧ first side

123‧‧‧ plate body

123a‧‧‧ first surface

123b‧‧‧ second surface

130‧‧‧Laminated battery strings

130a‧‧‧ first side

130a’ ‧ ‧ regular ups and downs

130b‧‧‧ second side

130b’ ‧ ‧ regular ups and downs

132‧‧‧Solar cell

132a‧‧‧ first surface

132b‧‧‧second surface

134‧‧‧first electrode

136‧‧‧second electrode

138‧‧‧Electrically conductive adhesive layer

140‧‧‧Second packaging material

141‧‧‧Second packaging material

142‧‧‧plate body

142a‧‧‧ first surface

142b‧‧‧ second surface

142b’‧‧‧ regular ups and downs

143‧‧‧ plate body

143a‧‧‧ first surface

143b‧‧‧ second surface

143b’‧‧‧ regular ups and downs

150‧‧‧Second outer board

150a‧‧‧ first surface

150b‧‧‧second surface

151‧‧‧Second outer board

151a‧‧‧ first surface

151b‧‧‧ second surface

151b’‧‧‧ regular ups and downs

151b’‧‧‧ regular ups and downs

160‧‧‧First direction

170‧‧‧First packaging material

172‧‧‧plate body

172a‧‧‧ first surface

172a’ ‧ ‧ regular ups and downs

174‧‧‧ first sub-layer

174a‧‧‧Regular fluctuations

176‧‧‧ second sub-layer

180‧‧‧Second packaging material

182‧‧‧ plate body

182b‧‧‧ second surface

182b’‧‧‧ regular ups and downs

184‧‧‧ first sub-layer

184a‧‧‧Regular fluctuations

186‧‧‧ second sub-layer

190‧‧‧First packaging material

192‧‧‧plate body

192a‧‧‧ first surface

192a’ ‧ ‧ regular ups and downs

194‧‧‧ first sub-layer

196‧‧‧ second sub-layer

200‧‧‧Second packaging material

202‧‧‧ plate body

202b‧‧‧second surface

202b’‧‧‧ regular ups and downs

204‧‧‧First sub-layer

206‧‧‧ second sub-layer

300‧‧‧Package

302‧‧‧plate body

302a‧‧‧ first surface

302s‧‧‧ first side

304‧‧‧Regular fluctuations

304w‧‧‧Width

310‧‧‧First direction

320‧‧‧second direction

330‧‧‧High rise

332‧‧‧ side

334‧‧‧ side

340‧‧‧ space

342‧‧‧ Space

344‧‧‧ Space

346‧‧‧ space

The above and other objects, features, advantages and embodiments of the present invention will become more <RTIgt; <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; FIG. 2 is a schematic diagram of a solar cell module according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a solar cell module device according to an embodiment of the present invention; FIG. 4 is a schematic diagram of a solar cell module according to an embodiment of the present invention; FIG. 5 is a schematic diagram of a solar cell module according to an embodiment of the present invention; And FIG. 6 is a schematic top view showing a package of a solar cell module according to an embodiment of the present invention.

Please refer to FIG. 1 , which is a schematic diagram of an apparatus for a solar cell module according to an embodiment of the present invention. In some embodiments, the solar cell module 100 mainly includes a first outer panel 110, a first encapsulation material 120, a laminated battery string 130, a second encapsulation material 140, and a second outer panel 150 that are sequentially stacked. In the present embodiment, the first outer panel 110 is a flat plate, that is, the first surface 110a and the second surface 110b of the first outer panel 110 are flat surfaces. The first outer panel 110 can be any of the two outer panels of the solar cell module. One. When the first outer panel 110 is the outer panel of the light receiving side of the single-sided light receiving solar cell module, or when the first outer panel 110 is any outer panel of the double-sided light receiving solar cell module, the first outer panel 110 material can be transparent material or glass. When the first outer panel 110 is a non-light-receiving side outer panel of the single-sided light-receiving solar cell module, the first outer panel 110 may be an opaque back panel. The first outer panel 110 can have a thickness of from about 0.85 mm to about 3.2 mm.

The laminated battery string 130 includes a plurality of solar cells 132. Each of the solar cells 132 has a flat structure. The thickness of each solar cell sheet 132 can be, for example, about 180 μm. Each of the solar cells 132 includes at least one first electrode 134 and at least one second electrode 136, wherein the first electrode 134 and the second electrode 136 are respectively disposed on the first surface 132a and the second surface of the solar cell sheet 132 opposite to each other. 132b is located on opposite sides of the solar cell sheet 132, respectively. In some examples, the first electrode 134 and the second electrode 136 shown in FIG. 1 refer to a busbar portion. The surface of the solar cell sheet 132 may be additionally provided with a finger not shown in the drawings. The finger part. As shown in FIG. 1, the second electrode 136 of a solar cell 132 and the first electrode 134 of the adjacent solar cell 132 are permeable to the conductive adhesive layer 138 to form a laminated battery string 130. The first electrode 134 of the first solar cell 132 of the laminated battery string 130 and the second electrode 136 of the last solar cell 132 may each be electrically connected via a bus bar or junction box not shown. Since the laminated battery string 130 is formed by laminating the solar cells 132, the opposing first side 130a and second side 130b of the laminated battery string 130 have regular undulations 130a' and 130b', respectively.

The first encapsulation material 120 is interposed between the first outer panel 110 and the laminated battery string 130. The first encapsulant 120 includes a plate-like body 122. The plate-like body 122 includes a first surface 122a and a second surface 122b that are opposite to each other. In the present embodiment, the first surface 122a corresponds to the regular relief 130a' of the first side 130a of the laminated battery string 130, and thus the first surface 122a may comprise at least one regular relief 122a' of the wedge shape. In the regular undulation of the wedge shape of the present invention, the definition of "starting" is that the extension direction of the "up" or "up" portion of the profile is in the same direction. The first side 130a of the laminated battery string 130 corresponds to the undulation of the first surface 122a of the plate-like body 122 to abut the first surface 122a. It should be noted that the correspondence herein does not mean that the structure of the first side 130a of the laminated battery string 130 completely matches the structure of the first surface 122a of the plate-like body 122. The "correspondence" of the surface of the laminated battery string and the package material in the embodiments of the present specification means that the fluctuation periods of the two are the same, and the positions of the undulating high and low regions substantially match. Of course, in some particular examples, the structure of the first side 130a of the laminated battery string 130 can be perfectly matched to the structure of the first surface 122a of the plate-like body 122. The regular relief 122a' of the first surface 122a extends in a first direction 160, wherein the first direction 160 can be, for example, parallel to the first side 122s of the plate-like body 122. It should be noted that the plate-shaped body 122 may be a rectangle from above, and the first side 122s may be a long side or a short side. The long side and the short side of the rectangular plate-shaped body according to each embodiment of the present invention and the long side and the short side of the solar battery module constructed thereof are parallel. Therefore, the first direction 160 is also the extending direction of the long side or the short side of the elongated solar cell module. In some examples, as shown in FIG. 1, the first surface 122a of the plate-like body 122 can include a plurality of inclined faces, and the second surface 122b is a flat surface.

The regular undulations 122a' of the first surface 122a of the plate-like body 122 have periodicity along the first side 122s of the plate-like body 122. In some exemplary examples, the length period 122p of the regular undulation 122a' of the first surface 122a of the plate-like body 122 may be approximately (L/NX) mm, where L is the side length of a commercial solar substrate, and N is 1-10. A positive integer, and X is 1~5. When N is a positive integer of 2 to 10, it is a solar cell sheet 132 obtained by cutting a commercial solar cell substrate to obtain a laminated battery string 130. When N is 1, it is uncut, and the value X may be two adjacent solar cells. The length of the overlap area of 132. At present, the side length of the more common commercial solar cell substrate is about 156 mm to 158 mm, of which 156 mm and 156.75 mm are currently the mainstream, and the side length is also 125 mm. The first solar cell 132 and the last solar cell 132 of the laminated battery string 130 are not suitable for the calculation of the length period 122p because only one end is connected to the other solar cells 132.

The material of the first encapsulant 120 may be a thermosetting buffer material or a thermoplastic buffer material. For example, the material of the first encapsulant 120 may be ethylene vinyl acetate (EVA), polyolefin, polyvinyl butyral (PVB), polyethylene ionomer ( Polyethylene ionomers), silicone, or thermoplastic polyurethane (TPU).

The second encapsulation material 140 is disposed on the second side 130b of the laminated battery string 130, and sandwiches the laminated battery string 130 therein with the first encapsulation material 120. In some exemplary examples, as shown in FIG. 1, the second package 140 is also the same A plate-like body 142 may be included. The plate-shaped body 142 includes a first surface 142a and a second surface 142b that are opposite to each other. In the present embodiment, the second surface 142b corresponds to the regular relief 130b' of the second side 130b of the laminated battery string 130, and thus the second surface 142b may comprise a wedge-shaped regular undulation 142b'. The second side 130b of the laminated battery string 130 corresponds to the undulation of the second surface 142b of the plate-like body 142 to abut the second surface 142b. The regular relief 142b' of the second surface 142b can extend in the first direction 160. In addition, the second surface 142b of the plate-shaped body 142 may include a plurality of inclined surfaces, and the first surface 142a is a flat surface.

The material of the second encapsulant 140 may be a thermosetting buffer material or a thermoplastic buffer material. For example, the material of the second encapsulant 140 may be ethylene vinyl acetate, polyolefin, polyvinyl butyral, polyethylene ionomer, oxime resin, or thermoplastic polyurethane.

The second outer panel 150 is disposed on the first surface 142a of the plate-shaped body 142. In some embodiments, the second outer panel 150 is a flat plate, that is, the opposing first surface 150a and the second surface 150b of the second outer panel 150 are both flat surfaces. The second outer panel 150 can be any of the two outer panels of the solar cell module. When the second outer panel 150 is the outer panel of the light receiving side of the single-sided light receiving solar cell module, or when the second outer panel 150 is any outer panel of the double-sided light receiving solar cell module, the second outer panel The material of 150 can be transparent material or glass. When the second outer panel 150 is a non-light-receiving side outer panel of the single-sided light-receiving solar cell module, the second outer panel 150 may be an opaque back panel. The second outer panel 150 can have a thickness of from about 0.85 mm to about 3.2 mm.

Referring to FIG. 1 , when the solar cell module 100 is fabricated, the first outer panel 110 , the first package 120 , the laminated battery string 130 , and the first The two encapsulation materials 140 and the second outer panel 150 are sequentially stacked, and the first side 130a of the laminated battery string 130 corresponds to the regular undulation 122a' of the first surface 122a of the plate-like body 122 of the first encapsulation 120. The first surface 122a is contiguous. In addition, the second side 130b of the laminated battery string 130 may be further adjacent to the second surface 142b corresponding to the regular undulation 142b' of the second surface 142b of the plate-like body 142 of the second package 140. In some examples, the first outer panel 110, the first encapsulant 120, the laminated battery string 130, the second encapsulant 140, and the second outer panel 150 are sequentially stacked from bottom to top.

Next, a heating lamination step is performed to melt the first encapsulation material 120 and the second encapsulation material 140, thereby causing the first outer panel 110, the first encapsulation material 120, the laminated battery string 130, the second encapsulation material 140, and The second outer panels 150 are bonded to each other to substantially complete the fabrication of the solar cell module 100. In this embodiment, before the heating lamination step, the first encapsulation material 120 is not fixed on the first surface 110a of the first outer panel 110, and the second encapsulation material 140 is not fixed on the second outer panel 150. On the second surface 150b.

Since the first surface 122a of the plate-like body 122 of the first package 120 includes a regular undulation 122a' corresponding to the undulation of the first side 130a of the laminated battery string 130, and/or the plate-like body 142 of the second package 140 The second surface 142b includes regular undulations 142b' corresponding to the undulations of the second side 130b of the laminated battery string 130, such that the first package 120 and/or the second package 140 can be laminated to the battery string during the heat lamination step The 130 provides a more uniform support, thereby reducing the chance of the slabs or fragments of the laminated battery string 130, thereby effectively improving the process yield. In addition, the regular undulations 122a' of the plate-like body 122 and/or the regular undulations 142b' of the plate-like body 142 are available for the laminated battery strings. 130 alignment is provided whereby the laminated battery string 130 can be further positioned during the heat lamination process to make it less prone to displacement.

In the present invention, as long as the surface of the first package 120 and the second package 140 that is bonded to the laminated battery string 130 has an undulating structure corresponding to one side of the laminated battery string 130, and The one of the encapsulation material 120 and the second encapsulation material 140 in the heating lamination step, whether as the upper or lower encapsulation material, contributes to reducing the fragmentation and splitting of the solar cell module 100 of the laminated battery string 130. It is not limited to the architecture shown in the embodiment of FIG. 1. If the one of the first encapsulant 120 and the second encapsulant 140 is located in the lower layer in the heating lamination step, the undulating structure of the bonding surface of the person may be utilized to assist the positioning of the laminated battery string 130.

Please refer to FIG. 2 , which is a schematic diagram of an apparatus for a solar cell module according to another embodiment of the present invention. The structure of the solar cell module 100a of the present embodiment is substantially the same as that of the solar cell module 100 shown in FIG. 1. The difference between the two is that when the solar cell module 100a is fabricated, before the heating lamination step, A package material 120 and a second package material 140 are first fixed on the first surface 110a of the first outer panel 110 and the second surface 150b of the second outer panel 150, respectively. In the embodiment shown in FIG. 2, only one of the first encapsulation material 120 and the second encapsulation material 140 may be pre-fixed on the corresponding outer panel.

The regular undulations on the surface of the encapsulant may come from undulations on the surface of the outer panel. Please refer to FIG. 3 , which is a schematic diagram of an apparatus for a solar cell module according to another embodiment of the present invention. The structure of the solar cell module 100b of the present embodiment and the structure of the solar cell module 100a shown in FIG. Roughly the same, the difference between the two is the structure of the first outer panel 111, the first encapsulant 121, the second encapsulant 141, and the second outer panel 151, and the first outer panel 110 of the solar cell module 100a, The structure of one of the package material 120, the second package material 140, and the second outer panel 150 is different.

As shown in FIG. 3, the first outer panel 111 has a first surface 111a and a second surface 111b opposite thereto. In the present embodiment, the first outer panel 111 is not a flat structure, i.e., the first surface 111a has a regular undulation 111a', and the second surface 111b may be a flat surface. The plate-shaped body 123 of the first encapsulant 121 may be fixedly fixed on the first surface 111a of the first outer plate 111 before the heating lamination step, wherein the plate-like body 123 has opposite first and second surfaces 123a and 123b The second surface 123b abuts the first surface 111a of the first outer panel 111.

In some embodiments, the regular undulations 111a' may correspond to the regular undulations 130a' of the first side 130a of the laminated battery string 130, and the plate-like body 123 extends along the regular undulations 130a' in a substantially uniform thickness. As such, the first surface 123a of the plate-like body 123 has a regular undulation 123a', and the regular undulation 123a' may also correspond to the regular undulation 130a' of the first side 130a of the laminated battery string 130. Therefore, as shown in FIG. 3, the first surface 123a and the second surface 123b of the plate-like body 123 may each include a plurality of inclined faces. In other examples, the undulation of the first outer panel 111 does not correspond to the regular relief 130a' of the first side 130a of the laminated battery string 130, and the thickness of the plate-like body 123 extending along the regular relief 130a' is not uniform. The regular undulation 130a of the first surface 123a of the plate-like body 123 is obtained by the sum of the undulation of the first surface 111a of the first outer plate 111 and the thickness unevenness of the plate-like body 123. It may correspond to the regular relief 130a' of the first side 130a of the laminated battery string 130. Therefore, the undulation of the first surface 123a of the plate-like body 123 of the present embodiment is partially derived from the first outer panel 111.

The second outer panel 151 has opposite first and second surfaces 151a, 151b. In some embodiments, as shown in Fig. 3, the second outer panel 151 is also not a flat structure, i.e., the second surface 151b has a regular undulation 151b', and the first surface 151a may be a flat surface. The plate-shaped body 143 of the second encapsulant 141 may also be covered and fixed on the second surface 151b of the second outer panel 151 before the heating lamination step, wherein the plate-like body 143 has opposite first and second surfaces 143a and 143 143b, the first surface 143a abuts the second surface 151b of the second outer panel 151.

In some exemplary examples, the regular undulation 151b' may correspond to a regular undulation 130b' of the second side 130b of the laminated battery string 130, and the plate-like body 143 extends along the regular undulation 130b' with a substantially uniform thickness. The second surface 143b of the plate-like body 143 has a regular undulation 143b' corresponding to the regular undulations 130b' of the second side 130b of the laminated battery string 130. Similarly, the undulation of the second outer panel 151 may not correspond to the regular undulation 130b' of the second side 130b of the laminated battery string 130, and the thickness of the plate-like body 143 extending along the regular undulation 130b' is not uniform, but The second surface 143b of the plate-like body 143 is regularly undulated 143b' and the laminated battery string 130 by the sum of the undulation of the second surface 151b of the second outer plate 151 and the thickness unevenness of the plate-like body 143. The regular undulation 130b' of the second side 130b corresponds. Therefore, the undulation of the second surface 143b of the plate-like body 143 of these examples is partially derived from the second outer panel 151.

Please refer to FIG. 4 , which is a schematic diagram of an apparatus for a solar cell module according to another embodiment of the present invention. The structure of the solar cell module 100c of the present embodiment is substantially the same as that of the solar cell module 100b shown in FIG. 3, and the difference between the two is the first outer panel 110 and the second outer panel of the solar cell module 100c. 150 is a flat structure like the embodiment of FIG. 1 and FIG. 2 , and the plate-shaped body 172 of the first package 170 and the plate-shaped body 182 of the second package 180 are both of a multi-layer structure.

As shown in FIG. 4, the plate-shaped body 172 of the first package 170 includes a first sub-layer 174 and a second sub-layer 176, wherein the first sub-layer 174 is located on the first surface 110a of the first outer panel 110, and second Sublayer 176 is stacked on first sub-layer 174. The plate-like body 172 may be fixed to the first surface 110a of the first outer panel 110 before the heat lamination step. In some embodiments, the first sub-layer 174 includes a plurality of wedge structures arranged along the first direction 160 such that the first sub-layer 174 has a wedge-shaped regular relief 174a. This regular undulation 174a may correspond to the regular undulations 130a' of the first side 130a of the laminated battery string 130. The second sub-layer 176 extends along the regular undulation 174a with a substantially uniform thickness, whereby the first surface 172a of the plate-like body 172 has a regular undulation 172a', and the regular undulation 172a' can also be combined with the laminated battery string 130. The regular undulations 130a' of the first side 130a correspond. In these embodiments, the regular relief 172a' of the first surface 172a of the plate-like body 172 is caused by uneven thickness of the first sub-layer 174. In some examples, the materials of the first sub-layer 174 and the second sub-layer 176 are respectively different thermosetting buffer materials or thermoplastic buffer materials. In some specific examples, the material of the first sub-layer 174 and the second sub-layer 176 can be the same thermoset buffer material or thermoplastic buffer material.

In some embodiments, the plate-shaped body 182 of the second package 180 may further include a first sub-layer 184 and a second sub-layer 186, wherein the first sub-layer 184 is located on the second surface 150b of the second outer plate 150, The two sub-layers 186 are stacked on the first sub-layer 184 and the second surface 150b of the second outer panel 150. The plate-like body 182 may be fixed to the second surface 150b of the second outer panel 150 before the heat lamination step. In some examples, the first sub-layer 184 includes a plurality of wedge structures arranged along the first direction 160 such that the first sub-layer 184 has a wedge-shaped regular relief 184a. The regular relief 184a may correspond to the regular relief 130b' of the second side 130b of the laminated battery string 130. The second sub-layer 186 may extend along the regular relief 184a in a substantially uniform thickness, such that the second surface 182b of the plate-like body 182 may also have regular fluctuations corresponding to the regular relief 130b' of the second side 130b of the laminated battery string 130. 182b'. Therefore, the regular undulations 182b' are caused by the uneven thickness of the first sub-layer 184. The materials of the first sub-layer 184 and the second sub-layer 186 are respectively different thermosetting buffer materials or thermoplastic buffer materials, or may be the same thermosetting buffer material or thermoplastic buffer material.

Please refer to FIG. 5 , which is a schematic diagram of a solar cell module according to another embodiment of the present invention. The structure of the solar cell module 100d of the present embodiment is substantially the same as that of the solar cell module 100c shown in FIG. 4, and the difference between the two is the plate-like body 192 of the first package 190 of the solar cell module 100d. The multilayer structure of the plate-shaped body 202 of the second package 200 is different from the multilayer structure of the plate-like body 172 of the first package 170 of the solar cell module 100c and the plate-like structure 182 of the second package 180.

As shown in FIG. 5, the plate-shaped body 192 of the first package 190 includes a first sub-layer 194 and a second sub-layer 196, wherein the first sub-layer 194 is located on the first surface 110a of the first outer panel 110, and second Sublayer 196 is stacked on first sub-layer 194. In some embodiments, the first sub-layer 194 is a flat plate, and the second sub-layer 196 includes a plurality of wedge-shaped structures arranged along the first direction 160 on the first sub-layer 194, thereby enabling the plate-like body 192 A surface 192a has a wedge-shaped regular undulation 192a'. This regular undulation 192a' may correspond to the regular undulations 130a' of the first side 130a of the laminated battery string 130. In some examples, the second sub-layer 196 can be attached to at least a portion of the first side 130a of the laminated battery string 130 prior to the heating lamination step, while the first sub-layer 194 may not yet be heated prior to the lamination step Bonding to the laminated battery string 130 and the first outer panel 110. In these embodiments, the regular relief 192a' of the first surface 192a of the plate-like body 192 is caused by the uneven thickness of the second sub-layer 196. In some specific examples, the regular fluctuations in the surface of the plate-like body of the encapsulating material may be caused by the sum of the degree of undulation of the first sub-layer and the second sub-layer.

In some embodiments, the plate-shaped body 202 of the second package 200 includes a first sub-layer 204 and a second sub-layer 206, wherein the first sub-layer 204 is located on the second surface 150b of the second outer panel 150, the second sub- Layer 206 is stacked on first surface 204b and second surface 150b of second outer panel 150. In some embodiments, the first sub-layer 204 is a flat plate, and the second sub-layer 206 includes a plurality of wedge-shaped structures arranged along the first direction 160 on the first sub-layer 204, thereby enabling the plate-shaped body 202 to be The two surfaces 202b have a wedge-shaped regular relief 202b'. This regular relief 202b' may correspond to the regular relief 130b' of the second side 130b of the laminated battery string 130. In some examples, the second sub-layer 206 can also be added The thermal lamination step is fixed to at least a portion of the second side 130b of the laminated battery string 130, and the first sub-layer 204 may not yet be associated with the laminated battery string 130 and the second outer panel 150 prior to the heat lamination step. Bonding. In these embodiments, the regular relief 202b' of the second surface 202b of the plate-like body 202 is caused by uneven thickness of the second sub-layer 206.

In the present invention, the first package material and the second package material of the above embodiment, and the corresponding first outer plate and second outer plate may be selected from different embodiments, and are not limited to FIG. 1 to FIG. The architecture shown in 5. Alternatively, the outer panel and the encapsulating material of one of the solar cell modules may be selected to adopt the structure of any of the embodiments of the present invention, and the conventional structure is still adopted on the other side.

Please refer to FIG. 6 , which is a top view of a package of a solar cell module according to an embodiment of the present invention. The package 300 of the solar cell module may include a plate-like body 302. The plate-shaped body 302 is a light-permeable plate material, which may be a thermosetting cushioning material or a thermoplastic buffer material such as ethylene vinyl acetate, polyolefin, polyvinyl butyral, polyethylene ionomer, epoxy resin, or thermoplastic. Polyurethane.

The plate-shaped body 302 has a first side 302s. In the present embodiment, as shown in FIG. 6, the first surface 302a of the plate-like body 302 includes more than one wedge-shaped regular undulation 304. Each of the regular undulations 304 extends in a first direction 310, wherein the first direction 310 is parallel to the first side 302s of the plate-like body 302. These regular undulations 304 are aligned along the second direction 320, wherein the second direction 320 can be perpendicular to the first direction 310. In addition, the width 304w of each regular undulation 304 in the second direction 320 is substantially equal to a commercial solar cell substrate. The side is long. Each of the regular undulations 304 corresponds to a stack of battery strings, such as the undulations on one side of the laminated battery string 130 of Figures 1 through 5, and is available for placement of a stack of battery strings 130. For example, if there are three regular undulations 304 as shown in FIG. 6, the three laminated battery strings 130 can be placed on the first surface 302a of the plate-shaped body 302 corresponding to the regular undulations 304, respectively.

In some embodiments, as shown in FIG. 6, between the two adjacent regular undulations 304, a raised portion 330 may be disposed on the first surface 302a of the plate-like body 302. Each raised portion 330 extends in a first direction 310. Since the raised portion 330 is interposed between adjacent regular undulations 304, it can be used to position the laminated battery strings. In some exemplary embodiments, each raised portion 330 can have two sides 332 and 334 on which a reflective structure or a reflective material can be placed or attached, thereby increasing the light of the solar cell module. Utilization rate. Alternatively, the raised portion 330 may have a rectangular cross section, and the upper portion of the raised portion 330 may be provided with or attached with a reflective structure or a reflective material. Alternatively, the raised portion 330 may have a trapezoidal cross-section, and the reflective structure or the reflective material may be disposed or attached to the plane or/and the side of the raised portion 330.

The area of the packaging material 300 is larger than the laminated battery string, so that space is left between the short side of the plate-like body 302 of the packaging material 300 and the regular undulation 304, respectively, except for the space between the two adjacent regular undulations 304. Spaces 344 and 346 are also left between 342, and the two long sides of the plate-like body 302 and the regular undulations 304, respectively. These spaces 340, 342, 344 and 346 may also be provided with raised portions 330.

It is obvious from the above embodiments that the inner surface of the package of the present invention comprises a wedge corresponding to the laminated battery string. Regular fluctuations, so the package material can provide a more uniform support for the laminated battery string, thereby reducing the chipping or fragmentation probability of the battery string and effectively improving the process yield. In addition, the wedge-shaped regularity of the packaging material has a aligning function, and the laminated battery strings are aligned, whereby the laminated battery strings can be positioned during the lamination process, making them less prone to displacement.

While the present invention has been described above by way of example, it is not intended to be construed as a limitation of the scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

Claims (18)

A package material for a laminated solar cell module, comprising: a plate-shaped body having a first surface, wherein the first surface comprises at least one regular undulation of a wedge shape, the at least one regular undulation along a first The direction extends and corresponds to the undulation of one side of the laminated battery string, the first direction being parallel to one of the first sides of the plate-like body. The package material of the laminated solar cell module of claim 1, wherein the at least one regular undulating length period is (L/NX) mm, and L is a side length of a commercial solar cell substrate, and N is 1~ A positive integer of 10, X is 1~5. The package material of the laminated solar cell module of claim 2, wherein the width of the at least one regular undulation in a second direction is substantially equal to L. The package material of the laminated solar cell module of claim 3, wherein the at least one regular undulation exceeds 1, and the regular undulations are arranged along the second direction. The package material of the laminated solar battery module of claim 4, wherein the first surface has a raised portion between the adjacent two of the regular undulations. The package material of a laminated solar cell module according to any one of claims 1 to 5, wherein the plate-shaped body has a second surface opposite to the first surface, the first surface comprising a plurality An inclined surface, the second surface being a plane. The package material of the laminated solar cell module according to any one of the items 1 to 5, wherein the plate-shaped body has a phase For one of the second surfaces of the first surface, each of the first surface and the second surface includes a plurality of inclined faces. The package material of the laminated solar cell module of claim 1, wherein the plate-shaped body comprises a first sub-layer and a second sub-layer stacked on each other, the first sub-layer and the second sub-layer The materials are different thermosetting buffer materials or thermoplastic buffer materials. The package material of the laminated solar cell module of claim 8, wherein the first sub-layer is a flat plate, and the second sub-layer comprises a plurality of wedge-shaped structures. The package material of the laminated solar cell module of claim 8, wherein the first sub-layer comprises a plurality of wedge structures. A method for manufacturing a solar cell module, comprising: sequentially stacking a first outer panel, a first encapsulating material, at least one laminated battery string, a second packaging material, and a second outer panel, wherein the first The package material includes a first surface corresponding to a first side of the at least one laminated battery string, the first side of the at least one laminated battery string corresponding to the first surface undulation adjacent to the first surface And performing a heating lamination step such that the first outer panel, the first encapsulant, the at least one laminated battery string, the second encapsulant, and the second outer panel are joined to each other. The method of claim 11, wherein the first outer panel, the first encapsulant, the at least one laminated battery string, the second encapsulant, and the second outer panel are sequentially stacked The second package material includes a second surface corresponding to the second side of the at least one of the stacked battery strings, The second side of the at least one laminated battery string is contiguous with the second surface adjacent the second surface. The method of claim 11, wherein the first outer panel, the first encapsulant, the at least one laminated battery string, the second encapsulant, and the second outer panel are Stacked in order. The method of claim 11, wherein the number of the at least one laminated battery string exceeds 1, the first surface comprises a plurality of wedge-shaped regular undulations, and the laminated battery strings are respectively placed on the undulating irregularities of the wedges. . The method of claim 11, wherein the method further comprises fixing the first encapsulant to the first outer panel prior to performing the heating lamination step. The method of claim 15, wherein the undulation of the first surface is partially due to undulation of the first outer panel. The method of claim 11, wherein the first package comprises a first sub-layer and a second sub-layer, and the materials of the first sub-layer and the second sub-layer are different thermosetting buffer materials or Thermoplastic cushioning material. The method of claim 11, wherein the first encapsulating material has a first sub-layer and a second sub-layer, the second sub-layer adjoins the at least one laminated battery string, and the heating lamination is performed Before the step, the method further comprises fixing the second sub-layer to the at least one laminated battery string.