TWI559558B - Solar cell module and method for manufacturing the same - Google Patents

Description

Solar battery module and manufacturing method thereof

The present invention relates to a solar cell module, and more particularly to a solar cell module in which an electrical connection is formed by using an electrode tape.

Solar cells use the photoelectric conversion effect to convert sunlight into electrical energy, which is a clean energy without pollution. At present, solar cells have been extensively researched and produced, and gradually began to replace traditional power.

A common solar cell is a semiconductor element including an n-p junction, such as a single crystal germanium, an amorphous germanium, an amorphous germanium or other thin film semiconductor device having an n-p junction. The n-p junction is typically fabricated by doping n-type or p-type ions into the interior of the semiconductor component by diffusion or ion implantation. When light is irradiated to the semiconductor element, electrons and holes of a semiconductor element such as a germanium atom are separated from each other, and a drift current is generated due to an internal electric field formed by the p-n junction. In order to make the current generated by the electric field inside the solar cell conductive, the surface of the solar cell needs to be separately fabricated with a metal electrode. As shown in FIG. 1, these metal electrodes include the back electrodes 12, 22 of the solar cells 10, 20, and the front faces 11, 21 such as comb-shaped finger electrodes 13, 23 (Finger Electrode) and are formed at both ends of the finger electrodes. Bus bar electrodes 14, 24 (Busbar/Buss Bar).

The finger electrode and the bus bar electrode are usually coated with a silver paste (Silver Paste) on the surface of the semiconductor element by means of screen printing. In order to avoid obscuring sunlight, the finger electrodes generally have a thin line width and a certain spacing between adjacent finger electrodes. The back electrode can also be made by screen printing, and the material is usually aluminum. The difference from the finger electrode is that the back electrode can be completely coated on the back side of the solar cell.

Since a single crystalline germanium solar cell can only provide an output voltage of 0.5V to 0.7V, a plurality of solar cells are usually connected in series to form a solar cell module to provide a sufficient voltage value. As shown in FIG. 1, the way in which the solar cells are connected in series is usually to connect the positive and negative electrodes of adjacent solar cells using a ribbon 30 (Ribbon). For example, one end of the solder ribbon 30 is connected to the bus bar electrode 14 on the front side of the solar cell 10, and the other end of the solder ribbon 30 is connected to the back electrode 21 of the other solar cell 20 to generate an electrically connected solar cell. Module 1.

The above process includes the steps of fabricating a metal electrode and welding a solder ribbon. Due to the high temperature of the conventional soldering process, thermal stress is generated between the metal electrode and the crystalline germanium substrate due to the difference in expansion/contraction coefficient, which causes micro-cracking defects on the surface of the crystallized crucible.

A solar cell module includes a first solar cell, a second solar cell, and an electrode tape. The first solar cell includes a first front electrode and a first back electrode, the second solar cell includes a second front electrode and a second back electrode, and the first front electrode and the second solar energy of the first solar cell The second back electrode of the battery is adhered to the electrode tape as described above to form an electrical connection with each other.

A method for manufacturing a solar cell module, comprising: bonding a first adhesive surface of an electrode tape to a front electrode of a first solar cell, and attaching the electrode tape to a second direction opposite to the first adhesive surface; Adhering the surface to the back electrode of a second solar cell. Wherein, the bonding method comprises: contacting a first electrical contact point exposed on the first adhesive surface with the front electrode of the first solar cell, and exposing the second electrical contact point and the second solar energy to the second adhesive surface; The back electrode of the battery is in contact.

Embodiments of the present invention will be exemplified below with reference to the drawings. The elements shown in the drawings do not represent the actual dimensions of the elements, and the thickness, width or length thereof are drawn up for the sake of illustration. Also, in all the drawings, the same element symbols represent the same elements.

In the present specification, "electrode tape" means an adhesive tape having an electrode in its structure. "Electrode" is an electrical structure. "Tapes" means a film, such as a film, a strip, a sheet, and the like, which are usually rolled into a roll for storage, but may be optionally used. Cut into storage at appropriate lengths, or store in other suitable ways. At normal temperature, the surface of the film may be viscous or non-sticky. A film of non-stick surface at normal temperature, which can be viscous after being heated.

Referring to Figure 2, there is shown a schematic view of an electrode tape in accordance with one embodiment of the present invention. As shown in the figure, the electrode tape 100 of the present embodiment includes an adhesive film 101 and a conductive structure 102. The adhesive film 101 includes a first block 101a, a second block 101b, and a third block 101c. The conductive structure 102 includes two metal wires 102a and 102b arranged in parallel. The metal wires 102a of the conductive structure 102 are disposed between the first block 101a and the second block 101b, and the metal wires 102b of the conductive structure 102 are disposed in the second block 101b and the third block 101c. between.

The adhesive film 101 includes a first adhesive surface 103 and a second adhesive surface 104. The first adhesive surface 103 and the second adhesive surface 104 are respectively upper and lower surfaces of the adhesive film 101. Therefore, the first adhesive surface 103 and the second adhesive surface 104 are oriented in opposite directions. The first block 101a, the second block 101b, and the third block 101c included in the adhesive film 101 are each composed of an adhesive material. Therefore, the first block 101a and the second block 101b are adhered to the sidewall of the metal wire 102a of the conductive structure 102, and the second block 101b and the third block 101c are adhered to the sidewall of the metal wire 102b of the conductive structure 102. .

The metal wires 102a and 102b of the conductive structure 102 respectively include a first contact point (Electrical Contact Point) 105 and a second contact point 106. The first contact point 105 is exposed on the first adhesive surface 103 of the adhesive film 101, and the second contact point 106 is exposed on the second adhesive surface 104 of the adhesive film 101. That is, the metal wires 102a and 102b are embedded in the adhesive film 101, but include the first contact point 105 and the second contact point 106 exposed outside the adhesive film 101.

The first adhesive surface 103 and the second adhesive surface 104 of the adhesive film 101 are, for example, a surface having a viscosity at normal temperature, or a surface which is solid at normal temperature and has a viscosity after heating, for example, a thermoplastic adhesive (Thermal) Plastic Adhesive) constitutes the surface.

The material of the adhesive film 101 is preferably selected from the group consisting of adhesive materials having insulating properties, light transmittance, thermal stability and adhesion. Such adhesive materials are, for example, Acrylic Adhesive, Silicon Adhesive, Epoxy Adhesive, Ethylene Vinyl Acetate Adhesive, Polyethylene. Polyvinyl Ether Adhesive, Polyurethane Adhesive or Polyamide Adhesive. Inorganic Adhesive can also be used in addition to the above-mentioned organic adhesives (Organic Adhesive).

It should be noted that the adhesive film 101 shown in this example is a film of a proper size. However, in practice, the continuous process can also be carried out in a round manner, as will be described in detail later. The number of metal wires included in the conductive structure 102 is not limited, and it may also include more or less metal wires, as shown in Figure 3a. In addition, the cross-sectional shape of the metal wires 102a, 102b is not limited to the aforementioned circular shape, and may be a triangular, square, trapezoidal, pentagon or other polygonal metal wire as shown in FIG. 3b. The conductive structure 102 may also comprise an electrode structure other than a metal wire, such as a comb electrode or a mesh electrode, as shown in Figures 3c and 3d. The material of the electrically conductive structure 102 can be selected from a variety of metallic materials such as copper, tin, silver, zinc, iron, gold, platinum, lead, aluminum, or a combination of the foregoing. In addition, the metal wire may be bent or folded in addition to the above linear manner, and the curved or folded shape is, for example, horizontal (parallel to the first adhesive surface 103 and the second adhesive surface 104, such as 3e) or perpendicular (perpendicular to the first adhesive surface 103 and the second adhesive surface 104, as shown in FIG. 3f), and the plurality of metal wires may be substantially parallel or non-parallel to each other, and the present invention does not Set limits.

Since the adhesive film 101 included in the electrode tape 100 of the present embodiment is composed of an adhesive material and includes the first adhesive surface 103 and the second adhesive surface 104, the electrode tape 100 has a double-sided adhesive function. In addition, the conductive structure 102 included in the electrode tape 100 of the present embodiment includes the exposed first contact point 105 and the second contact point 106. Therefore, the electrode tape 100 has a double-sided conductive function.

Referring to Figure 4, there is shown an electrode tape of another embodiment of the present invention.

As shown, the main structure of the electrode tape 200 is the same as that of the electrode tape 100 shown in FIG. 2, which also includes an adhesive film 201 and a conductive structure 202. The adhesive film 201 includes a first adhesive surface 203 and a second adhesive surface 204.

Different from the foregoing embodiment, the first adhesive surface 203 includes a rough protrusion 203a, and the second adhesive surface 204 includes a rough protrusion 204a. The rough surface formed by the rough protrusions 203a and 204a can provide an additional contact area and facilitate the exclusion of air between the adhesive film 201 and the surface to be adhered. Therefore, the adhesion of the adhesive film 201 to the surface to be pasted can be improved. The arithmetic mean roughness (Ra) of the rough protrusions 203a of the first adhesive surface 203 and the rough protrusions 204a of the second adhesive surface 204 is, for example, 1 μm to 1 mm. Although in the embodiment, the roughness of the first adhesive surface 203 and the second adhesive surface 204 is increased to form a rough protrusion on the surface, in other embodiments, the first paste may be added by other means. The roughness of the surface 203 or the second adhesive surface 204 is, for example, the formation of a micro-concave.

Referring to Figure 5, there is shown an electrode tape of still another embodiment of the present invention.

As shown, the main structure of the electrode tape 300 is the same as that of the electrode tape 100 shown in FIG. The difference from the embodiment shown in FIG. 2 is that the electrode tape 300 further includes a first protective film 310 and a second protective film 320. The first protective film 310 is releasably attached to the first adhesive surface 303 of the adhesive film 301 and serves to protect the first adhesive surface 303. Similarly, the second protective film 320 is also releasably attached to the second adhesive surface 304 of the adhesive film 301 and used to protect the second adhesive surface 304. In the present embodiment, the first protective film 310 and the second protective film 320 are used to protect the surface of the front electrode tape 300, and may be removed before being attached to the surface of the solar cell for subsequent processing. The process for attaching the electrode tape 300 to the solar cell will be described in detail below.

The first protective film 310 and the second protective film 320 may be made of a material that is transparent or opaque, and the invention is not limited thereto. The material of the first protective film 310 or the second protective film 320 is, for example, a release sheet. The release film can be made of a release agent coated with a base film material. The base film material is, for example, polyethylene terephthalate (PET) or paper. The release agent is, for example, silicone (Silicone).

Referring to Figure 6a, a tandem solar cell module is shown.

As shown, the solar cell module 400 includes two solar cells connected in series: a first solar cell 410 and a second solar cell 420. The first solar cell 410 and the second solar cell 420 are electrically connected to each other through the electrode tape 100 disclosed in the present specification.

Referring to Figure 6b, the structure of the first solar cell 410 is shown. The first solar cell 410 includes a substrate 411, a front surface electrode (light absorbing surface) 412, and a back surface electrode (backlight surface) 413. A plurality of finger electrodes 414 are formed above the front electrode 412. In the present embodiment, the first solar cell 410 comprises a multicrystalline silicon solar cell, and the substrate 411 comprises a polycrystalline germanium substrate. The material of the finger electrode 414 is, for example, silver.

The second solar cell 420 has the same structure as the first solar cell 410, and also includes a front electrode 422, a back electrode 423, and a plurality of finger electrodes 424. In the embodiment, the first solar cell 410 and the second solar cell 420 are polycrystalline solar cells, but in other embodiments, the first solar cell 410 or the second solar cell 420 may be other types of solar cells. For example, it is a monocrystalline silicon solar cell, an amorphous silicon solar cell, or a thin film solar cell.

The electrode tape 100 includes a first end 110 and a second end 120. The first end 110 of the electrode tape 100 is adhered to the front electrode 412 of the first solar cell 410, and the second end 120 is adhered to the back electrode 423 of the second solar cell 420. In addition, the first adhesive surface 103 of the first end 110 of the electrode tape 100 is opposite to the front electrode surface of the first solar cell 410, and the second adhesive surface 104 is adhered to the front electrode surface of the first solar cell 410, and The first metal wire 102a and the second metal wire 102b of the electrode tape 100 intersect the finger electrode 414 of the first solar cell 410. The first adhesive surface 103 of the second end 120 of the electrode tape 100 is adhered to the back electrode 423 of the second solar cell 420, and the second adhesive surface 104 is opposite to the surface of the back electrode 423 of the second solar cell 420. Therefore, the first solar cell 410 and the second solar cell 420 are electrically connected in series with each other through the electrode tape 100.

Referring to Figure 7, there is shown another tandem solar cell module.

As shown, the solar cell module 500 includes a plurality of solar cells connected in series: a first solar cell 510, a second solar cell 520, a third solar cell 530, an N-1th solar cell 540, and an Nth solar cell 550 ( N is a positive integer). The first solar cell 510 to the Nth solar cell 550 are electrically connected to each other through the electrode tape 100 disclosed in the present specification.

The structure of the first solar cell 510 is the same as that of the solar cell 410 shown in FIG. 6b, and also includes a substrate 511, a front electrode 512, and a back electrode 513. Further, the second solar cell 520, the third solar cell 530, the N-1th solar cell 540, and the Nth solar cell 550 all have the same structure as the first solar cell 410.

As shown in the figure, the first solar cell 510, the second solar cell 520, the third solar cell 530, the N-1th solar cell 540, and the Nth solar cell 550 are disposed such that the front electrodes face upward and the back electrodes face under. The front electrode 512 of the first solar cell 510 is electrically connected to the back electrode 523 of the second solar cell 520 through the first electrode tape 100. Similarly, the front electrode 522 of the second solar cell 520 is electrically connected to the back electrode 533 of the third solar cell 530 through the second electrode tape 100. The front electrode 542 of the N-1 solar cell 540 is electrically connected to the Nth solar cell 550 through the N-1 electrode tape 100. Therefore, the first to Nth solar cells 510 to 550 are electrically connected in series with each other.

A method of manufacturing the electrode tape of the present embodiment will be described below.

One of the methods for producing the electrode tape of the present embodiment is, for example, a roll to roll technique, but the invention is not limited thereto. Referring to Figure 8a, there is shown a machine for making an electrode tape. As shown, the manufacturing machine 600 includes a conveyor belt 610, a metal wire reel 620, a glue material feeder 630, a heating device 640, and a protective film attachment device 650.

The conveyor belt 610 includes a Molding Tape 611 and two Roller 612, 613. The model belt 611 surrounds the two rollers 612, 613 and is driven by the two rollers 612 and 613. The cross-sectional structure of the model strip 611 along the tangential direction of line A-A' of Fig. 8a is shown in Fig. 8b. As shown, the surface of the model strip 611 includes two grooves 611a and 611b.

Metal wire reels 620 are disposed at the inlet end of the conveyor belt, and the metal wire reels 620 each include bearings 621, 622 and metal wires 623, 624. The metal wires 623, 624 are wound around the two bearings 621 and 622.

A glue material feeder 630 is disposed above the mold belt 611 for injecting the adhesive material 631 to the surface of the mold belt 611. The heating device 640, for example, an oven (Oven), is disposed at a middle portion of the mold belt 611 for removing the solvent contained in the adhesive material 631 and curing the adhesive material 631.

The protective film attaching device 650 is disposed at the outlet end of the conveyor belt 610 and includes a first reel 651, a second reel 652, a third reel 653, a fourth reel 654, a first protective film 655, and a second protective film 656. The first reel 651 and the third reel 653 are arranged in parallel and adjacent to each other. The first protective film 655 is wound around the second reel 652, and the second protective film 656 is wound around the fourth reel 654.

A method of manufacturing the electrode tape of the present embodiment using the manufacturing machine 600 will be described below.

First, the metal wires 623, 624 on the two metal wire reels 621, 622 are transferred to the surface of the model tape 611. The two metal wires 623 and 624 are fitted to the two grooves 611a and 611b of the model tape 611. However, only the surface of the partial metal wires 623, 624 is buried in the two trenches 611a and 611b, and the remaining portions of the two metal wires 623, 624 are exposed to the two trenches 611a and 611b. Thereafter, the adhesive material 631 is injected into the surface of the model tape 611 by the adhesive material feeder 630. The amount of the adhesive material 631 injected is such that the thickness (dry thickness) of the adhesive material 631 after curing is not greater than the thickness of the two metal wires 623 and 624. In addition, the thickness of the adhesive material 631 after curing must be such that the adhesive material 631 has sufficient adhesion to the sidewalls of the two metal wires 203 and 204. In the present embodiment, the thickness of the adhesive film 661 is, for example, 10 μm to 5 mm, or preferably 25 μm to 2 mm.

Thereafter, the two metal wires 623 and 624 and the adhesive material 631 above the mold tape 611 are transferred to the inside of the oven 640 by the driving of the two rollers 612 and 613. The temperature set by the oven 640 is, for example, 25 ° C to 180 ° C. The moisture or solvent contained in the adhesive material 631 is volatilized by the heating action of the oven 640. Therefore, after baking in the oven 640, the adhesive material 631 and the two metal wires 623, 624 are cured into an electrode tape 660. A cross section of the prepared electrode tape 660, see Fig. 8c, is a cross-sectional view taken along line B-B of Fig. 8a. As shown, the electrode tape 660 is formed to include an adhesive film 661 (consisting of adhesive material 631) and two metal wires 623 and 624. The adhesive film 661 includes a first adhesive surface 662 and a second adhesive surface 663, and the two metal wires 623 and 624 each include a first contact point 623a, 624a and a second contact point 623b, 624b, and the first contact point 623a The 624a is exposed on the first adhesive surface 662, and the second contact points 623b and 624b are exposed on the second adhesive surface 663.

Next, a protective film can be attached to the upper and lower surfaces of the electrode tape 660 by the protective film attaching device 650. The method is described as follows:

First, the electrode tape 600 is transferred into the protective film attaching device 650, and the first protective film 655 and the second protective film 656 are transferred from the second reel 652 and the fourth reel 654 to the surface of the electrode tape 600. Then, the electrode tape 600, the first protective film 655, and the second protective film 656 are pressed by the first reel 651 and the third reel 653, and the first protective film 655 and the second protective film 656 are attached to the electrode tape. 600 surface.

In addition, referring to FIG. 9a, the surface of the model strip 611 may further include a rough surface 614. Therefore, when the adhesive material 631 is injected into the surface of the mold tape 611 and cured by the oven 640, the electrode tape 660 obtained can have a rough protrusion as shown in FIG. A film platform 641 can also be disposed within the oven 640, which also includes a roughened surface 642, as shown in Figure 9b. The surface of the adhesive material 631 is laminated by the lamination platform 641, so that the surface of the cured electrode tape 660 has a rough protrusion as shown in FIG.

Of course, those skilled in the art will recognize that the above two metal wires 623 and 624 are used for the example, and more or less wires and matching grooves can be used for actual production. In addition, the design of the machine has other different kinds of designs, such as reels, ovens, rollers and other parts can be more or less, or other different configurations, or replaced by other different components. For example, another type of electrode tape making machine is exemplified below.

Referring to Figure 10, there is shown another manufacturing machine for electrode tape. The manufacturing machine 700 differs from the manufacturing machine 600 shown in FIG. 8 in that the manufacturing machine 700 replaces the heating device 640 of the manufacturing machine 600 with an ultraviolet (UV) irradiation device 740, and the rest is combined with the manufacturing machine. Station 600 is the same. That is, the manufacturing machine 700 includes a conveyor belt 710, a metal wire reel 720, an adhesive material feeder 730, and a protective film attaching device 750. The conveyor belt 710 includes a Molding Tape 711 and two Roller 712, 713. The metal wire reel 720 includes bearings 721, 722 and metal wires 723, 724. The protective film attaching device 750 includes a first reel 751, a second reel 752, a third reel 753, a fourth reel 754, a first protective film 755, and a second protective film 756. Of course, in other embodiments, the manufacturing machine can also be provided with a heating device and an ultraviolet light irradiation device at the same time, and the invention is not limited thereto.

A method of manufacturing an electrode tape using the manufacturing machine 700 will be described below.

First, the metal wires 723, 724 are placed on the surface of the model tape 711. Thereafter, a UV-polymerized adhesive material 731, such as an epoxy resin adhesive (Epoxy Resin), is injected from the adhesive material feeder 730. The injection amount of the UV-polymerized adhesive material 731 is the thickness of the UV-polymerized adhesive material 731 after curing, and is not more than the thickness of the two metal wires 723 and 724. Further, the thickness of the UV-polymerized adhesive material 731 after curing must be such that the UV-polymerizable adhesive material 731 has sufficient adhesion to the side walls of the two metal wires 723, 724.

Thereafter, the mold belt 711 is driven by the two rollers 712 and 713, and the UV-polymerized adhesive material 731 and the metal wires 723 and 724 are transferred to the ultraviolet (UV) irradiation device 740. At this time, the UV-polymerized adhesive material 731 is polymerized by irradiation with UV light and solidified into a film shape (Film). At the same time, the two metal wires 723, 724 are embedded in the UV polymer type adhesive material 731 and constitute an electrode tape 760. Thereafter, the step of folding or attaching the protective film is performed.

Referring to Figure 11, there is shown another apparatus for making an electrode tape. The manufacturing machine 800 differs from the manufacturing machine 600 shown in FIG. 8a in that the manufacturing machine 800 replaces the conveyor belt 610 and the heating device 640 of the manufacturing machine 600 with a molding die (Mold) 840, and the rest is made with the manufacturing machine. Station 600 is the same. That is, the manufacturing machine 800 includes a metal wire reel 820 and a protective film attaching device 850. The metal wire reel 820 includes bearings 821, 822 and metal wires 823, 824. The protective film attaching device 850 includes a first reel 851, a second reel 852, a third reel 853, a fourth reel 854, a first protective film 855, and a second protective film 856.

The forming die 840 includes an upper die 841, a lower die 842, a material injection port 843, and a heater 844. Both the upper mold 841 and the lower mold 842 can be moved up and down and joined to each other to form a filling space 846. A material injection port 843 is coupled to the upper mold 841 for injecting an adhesive material 845 into the fill space 846. The heater 844 is disposed, for example, inside the upper mold 841 or the lower mold 842, and the present invention is not limited thereto. The heater 844 is used to heat the upper mold 841, the lower mold 842, and the filling space 846.

A method of manufacturing the electrode tape 100 using the manufacturing machine 800 will be described below.

First, the upper mold 841 and the lower mold 842 are moved to open the forming mold 840. Thereafter, the metal wires 823, 824 are placed on the surface of the lower mold 842, and the forming mold 840 is closed. Thereafter, a glue material 845 is injected from the material injection port 843 into the filling space 846. The amount of adhesive material 845 injected is the thickness of the surface of the adhesive material 845 on the lower mold 842, and is not greater than the height of the two metal wires 823, 824 protruding from the surface of the lower mold 842. In addition, the thickness of the adhesive material 845 on the surface of the lower mold 842 must be such that the adhesive material 845 has sufficient adhesion to the sidewalls of the two metal wires 823, 824.

Thereafter, the adhesive material 845 injected into the filling space 846 is baked by the heater 844 to remove the solvent contained in the adhesive material 845 and cure the adhesive material 631. Therefore, after baking, the adhesive material 845 and the two metal wires 823, 824 are cured to form an electrode tape 860. Thereafter, the protective film attaching device 850 can be used to attach the protective films 855 and 856.

In the above method, the adhesive material 845 is injected into the forming mold 840 through the material injection opening 843 above the upper mold 841, but in other embodiments, the adhesive material 845 may also be injected from the lower mold 842 end, or simultaneously The upper mold 841 end and the lower mold 842 end are injected.

The embodiments described above are only for those of ordinary skill in the art to understand the spirit and scope of the present invention. Therefore, it is to be understood that the invention is not limited to the embodiments described above, and modifications and changes may be made to the above-described embodiments without departing from the spirit and scope of the invention.

Tangent direction of the A-A’‧‧‧ model belt

B-B’‧‧‧ tangential direction of electrode tape

1‧‧‧Solar battery module

10‧‧‧ solar cells

100‧‧‧Electrode tape

101‧‧‧Adhesive film

101a‧‧‧ first block

101a‧‧‧ first block

101b‧‧‧Second block

101c‧‧‧ third block

102‧‧‧Electrical structure

102a‧‧‧Metal wire

102b‧‧‧Metal wire

103‧‧‧First adhesive surface

104‧‧‧Second adhesive surface

105‧‧‧First touch point

106‧‧‧second touch point

110‧‧‧ first end

11‧‧‧ solar cell front

12‧‧‧Back electrode

120‧‧‧second end

13‧‧‧ finger electrode

14‧‧‧ Bus bar electrode

20‧‧‧ solar cells

200‧‧‧Electrode tape

201‧‧‧Adhesive film

202‧‧‧Electrical structure

203‧‧‧First adhesive surface

203a‧‧‧Rough bulge

204‧‧‧Second adhesive surface

204a‧‧‧Rough bulge

21‧‧‧ solar cell front

22‧‧‧Back electrode

23‧‧‧ finger electrodes

24‧‧‧ bus bar electrode

30‧‧‧ soldering tape

300‧‧‧Electrode tape

301‧‧‧Adhesive film

303‧‧‧First adhesive surface

304‧‧‧Second adhesive surface

310‧‧‧First protective film

320‧‧‧Second protective film

400‧‧‧Solar battery module

410‧‧‧First solar cell

411‧‧‧Substrate

412‧‧‧Front electrode

413‧‧‧Back electrode

414‧‧‧ finger electrode

420‧‧‧Second solar cell

421‧‧‧Substrate

422‧‧‧front electrode

423‧‧‧Back electrode

424‧‧‧ finger electrodes

500‧‧‧Solar battery module

510‧‧‧First solar cell

512‧‧‧front electrode

520‧‧‧Second solar cell

522‧‧‧Front electrode

523‧‧‧Back electrode

530‧‧‧ Third solar cell

533‧‧‧Back electrode

540‧‧‧N-1 solar cell

542‧‧‧Front electrode

550‧‧‧Nth solar cell

600‧‧‧Production machine

610‧‧‧ conveyor belt

611‧‧‧Model belt

611a‧‧‧ trench

611b‧‧‧ trench

612‧‧‧Roller

613‧‧‧Roller

614‧‧‧Rough surface

620‧‧‧Metal wire reel

621‧‧‧ bearing

622‧‧‧ bearing

623‧‧‧Metal wire

623a‧‧‧First touch point

623b‧‧‧second touch point

624‧‧‧Metal wire

624a‧‧‧First touch point

624b‧‧‧second touch point

630‧‧‧Viscose material feeder

631‧‧‧Viscose material

640‧‧‧heating device

641‧‧‧filming platform

642‧‧‧ a rough surface

650‧‧‧Protective film attachment device

651‧‧‧ first scroll

652‧‧‧second reel

653‧‧‧ Third reel

654‧‧‧ fourth reel

655‧‧‧First protective film

656‧‧‧Second protective film

660‧‧‧Electrode tape

661‧‧‧Adhesive film

662‧‧‧First adhesive surface

663‧‧‧Second adhesive surface

700‧‧‧Production machine

710‧‧‧ conveyor belt

711‧‧‧Model belt

712‧‧‧Roller

713‧‧‧Roller

720‧‧‧Metal wire reel

721‧‧‧ bearing

722‧‧‧ bearing

723‧‧‧Metal wire

724‧‧‧Metal wire

730‧‧‧Viscose material feeder

731‧‧‧UV polymer type adhesive material

740‧‧‧Ultraviolet (UV) irradiation device

750‧‧‧Protective film attachment device

751‧‧‧ first scroll

752‧‧‧second reel

753‧‧‧ third reel

754‧‧‧ fourth reel

755‧‧‧First protective film

756‧‧‧Second protective film

760‧‧‧Electrode tape

800‧‧‧Production machine

820‧‧‧Metal wire reel

821‧‧‧ bearing

822‧‧‧ bearing

823‧‧‧Metal wire

824‧‧‧Metal wire

840‧‧‧Forming mould

841‧‧‧Upper mold

842‧‧‧Mold

843‧‧‧Material injection

844‧‧‧heater

845‧‧‧Viscose material

846‧‧‧filled space

850‧‧‧Protective film attachment device

851‧‧‧ first reel

852‧‧‧ second reel

853‧‧‧ third reel

854‧‧‧ fourth reel

855‧‧‧First protective film

856‧‧‧Second protective film

860‧‧‧electrode tape

1 is a front view of a tandem solar cell module; FIG. 2 is a front view of an electrode tape according to an embodiment; FIG. 3a is a front view of another embodiment of the electrode tape; and FIG. 3b is an electrode tape of several embodiments. 3c is a top view of the electrode structure included in the electrode tape of an embodiment; FIG. 3d is a top view of the electrode structure included in the electrode tape of an embodiment; FIG. 3e is an implementation Figure 3f is a side view of an electrode tape of an embodiment; Figure 4 is a cross-sectional view of an electrode tape of an embodiment; Figure 5 is a front view of an electrode tape of an embodiment; Figure 6a is a front view of the electrode tape; A front view of a tandem solar cell module of an embodiment; FIG. 6b is a front view of one of the solar cells of FIG. 6a; FIG. 7 is a front view of a tandem solar cell module of another embodiment; Figure 8b is a cross-sectional view of the model tape of the electrode tape making machine of Figure 8a; Figure 8c is a cross-sectional view of one of the electrode tapes of the electrode tape making machine of Figure 8a; Figure 9a shows the electrode of Figure 8a FIG. 9b is a plan view of the film forming platform of the electrode tape making machine of FIG. 8a; FIG. 10 is a front view of the electrode tape making machine of another embodiment; FIG. A front view of the electrode tape making machine of the embodiment.

100. . . Electrode tape

101. . . Adhesive film

102a. . . Metal wire

102b. . . Metal wire

110. . . First end

120. . . Second end

400. . . Battery module

410. . . First solar cell

420. . . Second solar cell

421. . . Substrate

422. . . Front electrode

423. . . Back electrode

424. . . Finger electrode

Claims (9)

A solar cell module comprising: a first solar cell comprising a first front electrode and a first back electrode; a second solar cell comprising a second front electrode and a second back electrode; and an electrode tape The first front electrode of the first solar cell and the second back electrode of the second solar cell are respectively adhered to the electrode tape to form an electrical connection with each other; the electrode tape comprises: an adhesive film, a first adhesive surface having a rough protrusion and a second adhesive surface, wherein the first adhesive surface and the second adhesive surface face in opposite directions, respectively adhered to the first solar cell and the second solar cell And a conductive structure comprising a first contact point and a second contact point and embedded in the adhesive film, wherein the thickness of the adhesive film is less than the thickness of the conductive structure, the first contact point is exposed The first adhesive surface and the second contact point are exposed to protrude from the second adhesive surface. The solar cell module of claim 1, wherein at least one of the first front electrode of the first solar cell and the second front electrode of the second solar cell comprises a plurality of finger electrodes. The solar cell module of claim 2, wherein the material of the plurality of finger electrodes comprises silver. The solar cell module of claim 1, wherein at least one of the first back electrode of the first solar cell and the second back electrode of the second solar cell comprises aluminum. The solar cell module of claim 1, wherein the conductive junction The structure comprises a plurality of metal wires. The solar cell module of claim 1, wherein at least one of the first solar cell and the second solar cell is selected from the group consisting of a single crystal germanium solar cell, a polycrystalline germanium solar cell, and a thin film solar cell. A method for manufacturing a solar cell module, comprising: adhering a first adhesive surface of one of the adhesive films of an electrode tape to a front electrode of a first solar cell, and exposing a conductive structure included in the electrode tape to the a first electrical contact point of the first adhesive surface is in contact with the front electrode of the first solar cell; and a second adhesive surface of the adhesive film adhered to the back surface of the second solar cell, and Exposing the conductive structure included in the electrode tape to a second electrical contact point of the second adhesive surface to contact the back electrode of the second solar cell; wherein the first adhesive surface and the second adhesive surface are Or facing the opposite direction, and the first adhesive surface and the second adhesive surface have rough protrusions, the thickness of the adhesive film is less than the thickness of the conductive structure, and the first electrical contact point is in contact with the second electrical contact Points protrude from the first adhesive surface and the second adhesive surface, respectively. The method of manufacturing a solar cell module according to claim 7, wherein the method further comprises: removing a protective film attached to at least one of the first adhesive surface and the second adhesive surface of the electrode tape; The steps. The method for manufacturing a solar cell module according to claim 7, wherein the method further comprises: extending a direction of the first electrical contact point of the electrode tape to a finger on a front electrode of the first solar cell; The electrodes intersect.