TWI538228B - Solar cell module - Google Patents

Description

Solar battery module

The present invention relates to a solar cell module, and more particularly to a back contact solar cell module.

In recent years, due to the problems of global warming and the global energy crisis, countries are investigating various semiconductor components with low energy consumption and low pollution, among which green energy solar cells with no loss and pollution are the most popular.

In the solar cell technology, the metal through-electrode (MWT) is a process of realizing perforation on the original slab by laser or other methods, thereby introducing the original electrode to the same surface to form a back contact solar cell (back -contact solar cell), and thus reduce the shading area to increase the conversion efficiency of the battery.

When manufacturing an MWT solar cell module, it is common to first set a desired circuit on the substrate, and then place the solar cell on the substrate. Since the electrodes on the solar cell and the circuitry on the substrate must be accurately aligned, a mechanical arm is typically used to place the solar cell, which increases process cost. In addition, after the solar cell is placed, the solar cell must be fixed with a tape, but the tape may have problems such as yellowing or bubbles, which will reduce the conversion efficiency of the battery.

One aspect of the present invention provides a solar cell module in which a solar cell is accurately fixed in a substrate by providing a recess in the substrate.

According to an embodiment of the invention, a solar cell module includes a susceptor, at least one positive connection line, at least one negative connection line, and at least one solar cell. The base has at least one recess therein. The positive connection line has at least one positive contact and a positive patterned electrode, and the positive contact is located on the bottom surface of the groove. The negative connection line has at least one negative contact and a negative patterned electrode, and the negative contact is located on the bottom surface of the groove. The solar cell is at least partially located in the recess. The solar cell has at least one positive electrode contact and at least one negative electrode contact. The positive electrode contact of the solar cell electrically contacts the positive electrode contact of the positive electrode connection line, and the negative electrode contact of the solar cell electrically contacts the negative electrode contact of the negative electrode connection line.

In one or more embodiments of the invention, the solar cell is a back contact solar cell.

In one or more embodiments of the present invention, the base further has a substrate and at least one convex portion, and the convex portion is disposed on the substrate and surrounds the defined groove.

In one or more embodiments of the present invention, the pedestal further includes a first encapsulation layer disposed on the substrate and forming a bottom surface of the recess, and the first encapsulation layer has a plurality of holes, and the positive contact and the negative contact Pass through the holes separately. The solar cell module further includes a second encapsulation layer covering the pedestal and the solar cell.

In one or more embodiments of the invention, the bottom surface of the groove is planar.

In one or more embodiments of the present invention, the positive electrode patterned electrode and the negative electrode patterned electrode are substantially parallel to the bottom surface of the groove.

In one or more embodiments of the present invention, the bottom surface of the recess has a first half and a second half, a positive contact of the positive connection line is located in the first half, and a negative contact of the negative connection line is located in the second Half.

In one or more embodiments of the invention, the raised portion is a non-conductive material.

In one or more embodiments of the present invention, the positive electrode patterned electrode and the negative electrode patterned electrode are at least partially interposed between the convex portion and the substrate.

In one or more embodiments of the present invention, the pedestal further includes a first encapsulation layer disposed on the substrate and forming a bottom surface of the recess, and the first encapsulation layer has a plurality of holes, and the positive contact and the negative contact Pass through the holes separately.

In one or more embodiments of the present invention, the positive electrode connection line is at least partially interposed between the first package layer and the substrate, and the positive electrode contact of the positive electrode connection line is exposed outside the first package layer.

In one or more embodiments of the present invention, the negative electrode connection line is at least partially interposed between the first package layer and the substrate, and the negative electrode contact of the negative electrode connection line is exposed outside the first package layer.

In the above embodiment of the present invention, by providing a groove in the susceptor, the solar cell can be accurately fixed in the groove of the susceptor, so that when the assembly is assembled, there will be no electrode of the solar cell and the circuit on the pedestal. A difficult problem. In addition, since the solar cell is fixed in the groove, it is not required In addition, the solar cell is fixed by using a tape to avoid the problem that the tape is yellowed or bubbles are reduced to reduce the conversion efficiency of the solar cell. In addition, since the alignment solar cell and the susceptor are not difficult, it is not necessary to use a mechanical arm to align at the time of assembly, thereby reducing assembly costs.

4‧‧‧ segments

100‧‧‧Solar battery module

200‧‧‧ solar cells

210‧‧‧ positive contact

220‧‧‧negative contact

300‧‧‧Base

310‧‧‧Substrate

320‧‧‧ Groove

321‧‧‧ bottom

322‧‧‧ first half

323‧‧‧ second half

330‧‧‧ raised parts

340‧‧‧First encapsulation layer

341‧‧‧ hole

400‧‧‧ positive connection line

410‧‧‧ positive contact

420‧‧‧ positive electrode patterned electrode

500‧‧‧Negative connection line

510‧‧‧negative contact

520‧‧‧Negative graphic electrode

600‧‧‧Second encapsulation layer

700‧‧‧ Coverage

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

FIG. 2 is a partially exploded perspective view showing the susceptor and the solar cell of the solar cell module of FIG. 1.

FIG. 3 is a partial schematic view showing the partial combination of the susceptor and the solar cell of the solar cell module of FIG. 1.

Figure 4 is a cross-sectional view along line 4 of Figure 1.

Fig. 5 is a partial top view of the susceptor of the solar cell module of Fig. 1.

The embodiments of the present invention are disclosed in the following drawings, and the details of However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not necessary. In addition, some of the conventional structures and elements are shown in the drawings in a simplified schematic manner in order to simplify the drawings.

FIG. 1 is a perspective view of a solar cell module 100 in accordance with an embodiment of the present invention. FIG. 2 is a partially exploded perspective view showing the susceptor 300 and the solar cell 200 of the solar cell module 100 of FIG. 1 . FIG. 3 is a partial schematic view showing a partial combination of the susceptor 300 and the solar cell 200 of the solar cell module 100 of FIG. 1 . Figure 4 is a cross-sectional view along line 4 of Figure 1. The solar cell module 100 of the present embodiment includes at least one solar cell 200. The solar cell 200 can be a Back-Contact Solar cell and is primarily a Metal Wrap Through (MWT) solar cell.

As shown in FIG. 4 , the solar cell module 100 further includes a susceptor 300 , at least one positive connection line 400 , and at least one negative connection line 500 . The susceptor 300 has at least one recess 320 therein. The positive electrode connection line 400 has at least one positive electrode contact 410 and a positive electrode patterned electrode 420, and the positive electrode contact 410 is located on the bottom surface 321 of the groove 320. The negative connection line 500 has at least one negative contact 510 and a negative patterned electrode 520, and the negative contact 510 is located on the bottom surface 321 of the recess 320. The solar cell 200 is at least partially located in the recess 320, and in particular, at least the lower half of the solar cell 200 is received in the recess 320. The solar cell 200 has at least one positive electrode contact 210 and at least one negative electrode contact 220. The positive electrode contact 210 of the solar cell 200 electrically contacts the positive electrode contact 410 of the positive electrode connection line 400, and the negative electrode contact 220 of the solar cell 200 is electrically contacted. The negative electrode is connected to the negative electrode contact 510 of the line 500.

When assembling the solar cell module 100, the solar cell 200 needs to be placed on the susceptor 300, and the electrodes of the solar cell 200 (for example The positive contact 210 and the negative contact 220) must be aligned with circuitry on the susceptor 300 (eg, positive contact 410 and negative contact 510). Since the susceptor 300 has the recess 320, it is only necessary to align and place the solar cell 200 in the recess 320 during assembly, and the electrode of the solar cell 200 automatically and the circuit on the pedestal 300 due to the limitation of the recess 320. Counterpoint.

Since at least the lower half of the solar cell 200 is housed in the recess 320, the solar cell 200 will be fixed to the base 300 due to the limitation of the recess 320. Therefore, the solar cell 200 will not move relative to the susceptor 300 in a subsequent process or when the solar cell module 100 is operated, and thus the electrode of the solar cell 200 cannot be aligned with the circuit on the susceptor 300. In addition, since the recess 320 can achieve a fixed effect, the solar cell 200 can be adhered without using a tape or the like, thereby avoiding yellowing or bubbling of the tape, resulting in a decrease in light-in efficiency and a reduction in conversion efficiency of the solar cell 200. .

In addition, when the solar cell module 100 is assembled, since the position of each of the grooves 320 is clear and the overall size corresponds to the solar cell 200, it is only necessary to place the solar cell 200 into the recess 320 of the susceptor 300, and There is no need to specifically consider the alignment-related problems, so the assembly difficulty can be simplified, and it is not necessary to use an automatic device such as a robot arm because of consideration of the alignment-related problems, thereby reducing the cost of the process.

Specifically, the bottom surface 321 of the groove 320 is a flat surface. Since the bottom surface 321 of the recess 320 is a flat surface, the solar cell 200 can be smoothly placed on the bottom surface 321 and stably connected to the positive electrode contact 410 and the negative electrode contact 510 on the bottom surface 321 .

FIG. 5 is a partial top view of the susceptor 300 of the solar cell module 100 of FIG. 1. As shown in FIG. 4 and FIG. 5, the bottom surface 321 of the recess 320 may have a first half 322 and a second half 323, and the positive contact 410 of the positive connection line 400 is located at the first half 322, and the negative connection is The negative contact 510 of line 500 is located in the second half 323. Since the solar cell module 100 generally does not have only one solar cell 200, there is no corresponding one of the grooves 320. More specifically, the grooves 320 may be arranged side by side, and the first half 322 of the bottom surface 321 of each groove 320 is adjacent to the second half 323 of the bottom surface 321 of the adjacent other groove 320, and each concave The positive connection line 400 of the slot 320 is electrically connected to the negative connection line 500 of the adjacent other groove 320. It should be noted here that only two grooves 320 are shown in the figure, but in reality, the solar cell module 100 may not only include two grooves 320. In addition, the grooves 320 may also be arranged in a plurality of rows, and the connecting lines of the different rows of grooves 320 may be additionally provided to be electrically connected.

Specifically, as shown in FIG. 4 , the pedestal 300 further has a substrate 310 and at least one convex portion 330 , and the convex portion 330 is disposed on the substrate 310 , and as shown in FIG. 2 , the convex portion 330 surrounds defining the groove 320.

Specifically, the material of the susceptor 300 may be Fiber Glass Reinforced Plastics (FRP). More specifically, the material of the substrate 310 may be a glass fiber reinforced plastic. It should be understood that the materials of the susceptor 300 or the substrate 310 are merely exemplified, and are not intended to limit the present invention. Those having ordinary knowledge in the technical field of the present invention can flexibly select the display base 300 according to actual needs. Or the material of the substrate 310.

Specifically, the susceptor 300 further includes a first encapsulation layer 340. The bottom surface 321 of the recess 320 is formed on the substrate 310, and the first encapsulation layer 340 has a plurality of holes 341, and the positive electrode contact 410 and the negative electrode contact 510 respectively pass through the hole 341. The solar cell module 100 further includes a second encapsulation layer 600 covering the susceptor 300 and the solar cell 200. More specifically, the second encapsulation layer 600 may be transparent, so that the light-in efficiency of the solar cell module 100 will not be affected.

Specifically, the material of the first encapsulation layer 340 and the second encapsulation layer 600 may be Polyethylene Vinyl Acetate (EVA). It should be understood that the materials of the first encapsulation layer 340 and the second encapsulation layer 600 are merely illustrative, and are not intended to limit the present invention. Those having ordinary knowledge in the technical field of the present invention may be flexible according to actual needs. The materials of the first encapsulation layer 340 and the second encapsulation layer 600 are selected.

The first encapsulation layer 340 and the second encapsulation layer 600 can encapsulate the solar cell 200, so that the solar cell 200 can be protected from the environmental climate change, and the solar cell module 100 can maintain the power generation efficiency and ensure the solar energy. The service life of the battery module 100. In the packaging process, since the polyvinyl acetate (the material of the first encapsulation layer 340 and the second encapsulation layer 600) is a thermosetting hot melt adhesive film, the polyethylene can be made by hot pressing the solar cell module 100. Vinyl acetate is melt bonded and glued to the solar cell 200. The cured polyvinyl acetate is transparent and highly translucent, and is capable of withstanding atmospheric changes and elasticity.

In addition, since the solar cell 200 is received in the recess 320, the first encapsulation layer 340 and the second encapsulation layer 600 only need to encapsulate the upper portion and the lower portion of the solar cell 200, and the side portion is formed by the protrusion 330. As a result of the package, it does not need to be encapsulated by the encapsulation layer, which will save the material used for the encapsulation layer.

Specifically, the positive electrode connection line 400 may be at least partially interposed between the first package layer 340 and the substrate 310 , and the positive electrode contact 410 of the positive electrode connection line 400 may be exposed outside the first package layer 340 . The negative connection line 500 can be at least partially interposed between the first encapsulation layer 340 and the substrate 310, and the negative contact 510 of the negative connection line 500 can be exposed outside the first encapsulation layer 340. More specifically, the positive electrode patterned electrode 420 is at least partially interposed between the first encapsulation layer 340 and the substrate 310; the negative electrode patterned electrode 520 is at least partially interposed between the first encapsulation layer 340 and the substrate 310. The positive electrode contact 410 and the negative electrode contact 510 may be contact pads.

In particular, the positive electrode patterned electrode 420 and the negative electrode patterned electrode 520 may be at least partially interposed between the raised portion 330 and the substrate 310. The positive electrode patterned electrode 420 is electrically connected to the adjacent negative electrode patterned electrode 520. The positive electrode patterned electrode 420 and the adjacent negative electrode patterned electrode 520 may be the same material, and the positive electrode patterned electrode 420 and the adjacent negative electrode patterned electrode 520 may be formed together in the same process.

Since the positive electrode patterning electrode 420 and the negative electrode patterning electrode 520 are disposed under the convex portion 330 and the first encapsulation layer 340, the positive electrode patterning electrode 420 and the negative electrode patterning electrode 520 will be covered without being received during assembly. Damage caused by external forces.

Specifically, the positive electrode patterned electrode 420 and the negative electrode patterned electrode 520 may be substantially parallel to the bottom surface 321 of the groove 320. Since the positive electrode patterned electrode 420 and the negative electrode patterned electrode 520 are substantially parallel to the bottom surface 321 of the groove 320, Therefore, there is no chamfered structure between the positive electrode patterned electrode 420 and the negative electrode patterned electrode 520 and other adjacent structures (ie, the substrate 310, the convex portion 330, and the first encapsulation layer 340), so the positive electrode patterned electrode 420 and the negative electrode pattern The electrode 520 will not break due to stress from other adjacent structures.

In particular, the raised portion 330 can be a non-conductive material. It should be understood that the specific embodiments of the above-mentioned raised portion 330 are merely illustrative and are not intended to limit the present invention. Those having ordinary knowledge in the technical field of the present invention can flexibly select the convex portion 330 according to actual needs. Specific implementation.

Specifically, the solar cell module 100 may further include a cover layer 700, and the cover layer 700 is transparent. More specifically, the cover layer 700 is made of glass. The cover layer 700 has a function of protecting the solar cell module 100.

In the above embodiment of the present invention, by providing the recess 320 in the susceptor 300, the solar cell 200 can be accurately fixed in the recess 320 of the susceptor 300, so that there will be no electrode and base of the solar cell 200 during assembly. The circuit on the base 300 has a problem of alignment. In addition, since the solar cell 200 is fixed in the recess 320, it is not necessary to additionally fix the solar cell 200 by using a tape, thereby avoiding the problem that the tape is yellowed or bubbles are reduced to reduce the conversion efficiency of the solar cell 200. In addition, since the alignment solar cell 200 and the susceptor 300 are not difficult, it is not necessary to use a mechanical arm to align at the time of assembly, thereby reducing assembly costs.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

100‧‧‧Solar battery module

200‧‧‧ solar cells

210‧‧‧ positive contact

220‧‧‧negative contact

300‧‧‧Base

310‧‧‧Substrate

320‧‧‧ Groove

321‧‧‧ bottom

330‧‧‧ raised parts

340‧‧‧First encapsulation layer

341‧‧‧ hole

400‧‧‧ positive connection line

410‧‧‧ positive contact

420‧‧‧ positive electrode patterned electrode

500‧‧‧Negative connection line

510‧‧‧negative contact

520‧‧‧Negative graphic electrode

600‧‧‧Second encapsulation layer

700‧‧‧ Coverage

Claims (8)

A solar cell module comprising: a base having at least one recess therein, wherein the base comprises: a substrate; at least one raised portion disposed on the substrate And a first encapsulation layer disposed on the substrate and forming the bottom surface of the recess; at least one positive connection line having at least one positive contact and a positive patterned electrode, the positive connection The point is located on a bottom surface of the recess; at least one negative connection line having at least one negative contact and a negative patterned electrode, the negative contact being located on the bottom surface of the recess; at least one solar cell At least partially located in the recess, the solar cell has at least one positive contact and at least one negative contact, and the positive contact of the solar cell electrically contacts the positive contact of the positive connection, the solar cell The negative electrode contact electrically contacts the negative contact of the negative connection line, wherein the first encapsulation layer has at least one first hole and at least one second hole, the first The hole corresponds to the positive electrode contact of the solar cell, and the second hole corresponds to the negative electrode contact of the solar cell, the positive contact of the positive connection line passes through the first hole, and the negative electrode of the negative connection line a contact is passed through the second hole; and a second encapsulation layer covers the pedestal and the solar cell. The solar cell module of claim 1, wherein the positive electrode patterned electrode and the negative electrode patterned electrode are parallel to the bottom surface of the groove. The solar cell module of claim 1, wherein the bottom surface of the recess has a first half and a second half, and the positive contact of the positive connecting line is located in the first half, the negative The negative contact of the connection line is located in the second half. The solar cell module of claim 1, wherein the raised portion is a non-conductive material. The solar cell module of claim 1, wherein the positive electrode patterned electrode and the negative electrode patterned electrode are at least partially interposed between the convex portion and the substrate. The solar cell module of claim 1, wherein the positive connection line is at least partially interposed between the first encapsulation layer and the substrate, and the positive contact of the positive connection line is exposed outside the first encapsulation layer . The solar cell module of claim 1, wherein the negative connection line is at least partially interposed between the first encapsulation layer and the substrate, and the negative contact of the negative connection line is exposed outside the first encapsulation layer . The solar cell module of claim 1, wherein the bottom surface of the groove is a flat surface.