TWM569082U - Solar cell module - Google Patents

Abstract

A solar cell module structure includes a conductive connector including a first connection groove located in an upper portion of the conductive connector oriented toward a first direction, and a second connection groove located in a lower portion of the conductive connector oriented toward a second direction; a first solar cell unit inserted into the first connection groove at one end thereof and electrically connected to the conductive connector; and a second solar cell unit inserted at one end thereof into the second connection groove and electrically connected to the conductive connector. The conductive connector has an S-shaped or a serpentine sectional profile. The first direction and the second direction are opposite to each other.

Description

Solar battery module

This creation is about a solar cell technology field, especially related to an improved solar cell module structure, which can increase the module's power generation.

It is known that a solar cell is a photovoltaic element that combines a p-type and an n-type semiconductor material to form a positive and a negative electrode. When the solar cell is exposed to sunlight, it absorbs solar energy and generates electrons and holes, and a positive charge. The (hole) and the negative charge (electron) move in the positive (p-type) and negative (n-type) directions to generate a direct current. Such photovoltaic elements convert light energy into electrical energy and are therefore also referred to as photovoltaics (PV).

Generally, the solar cell manufacturing method is to perform wafer surface cleaning and roughening treatment, and then perform a diffusion process to form a phosphor glass layer and an impurity emitter region on the surface of the wafer, and then remove the phosphor glass layer by an etching process. Then, an anti-reflection layer is formed, and then the electrode pattern is printed on the metal paste web on the front and back sides of the battery by screen printing technology, and then sintered at a high temperature to form an electrode. Finally, the battery (for example, 6x10 or 6x12 array) is arranged on the glass substrate, and then stringer is connected, and the battery unit is serially connected into the solar module through the copper foil.

However, in the past, the solar cell module needs to be electrically connected to the interconnecting solder ribbon between the solar cell units through the bus bar located beside the solar cell array, so that a large separation distance needs to be reserved between the solar cells. In other words, in the past, the design of solar cell modules has a relatively high proportion of regions that cannot contribute to forwarding power, so there is a need for further improvement.

The main purpose of this creation is to provide an improved solar cell module with a laminated design that can further increase the module's power generation.

According to an embodiment of the present invention, a solar cell module structure includes a conductive connecting member, including a first connecting groove at an upper portion of the conductive connecting member, facing a first direction, and a second connecting concave portion a slot is located at a lower portion of the conductive connector, facing a second direction; a first solar cell unit having one end inserted into the first connecting recess and electrically connected to the conductive connecting member; and a second solar energy The battery unit has one end inserted into the second connection groove and electrically connected to the conductive connection. Wherein the conductive connecting member has an S-shaped cross-sectional profile or a serpentine cross-sectional profile, and the first direction and the second direction are opposite to each other.

According to an embodiment of the present invention, the first connecting groove has a first top surface, a first side surface and a first bottom surface, and the second connecting groove has a second top surface and a second a side surface and a second bottom surface. An upper electrode located on an upper surface of the first solar cell unit is electrically connected to the first top surface via a first conductive member, and a lower electrode system located on a bottom surface of the second solar cell unit The second bottom surface is electrically connected via a second conductive member.

The solar cell module structure is designed by lamination, and the battery cells are connected to each other in a tighter manner through the conductive connecting members. The edges of the battery cells are slightly overlapped so that there is no gap between the batteries, so the same unit is used. More batteries can be laid in the area, and the light absorption area is increased to further increase the power generation of the module. Moreover, through the connection of the conductive connecting members, the two-dimensional array arrangement of the battery cells can be realized, the battery modules are very flat after assembly, and there is no step-like drop, which is more convenient in packaging processing, and the packaging difficulty is reduced, so that the process can be improved. Yield.

The above described objects, features and advantages of the present invention will become more apparent from the following description. However, the following preferred embodiments and drawings are for illustrative purposes only and are not intended to limit the present invention.

In the following, the details will be described with reference to the drawings, which also form part of the detailed description of the specification, and are described in the manner of the specific examples in which the embodiment can be practiced. The following examples have been described in sufficient detail to enable those of ordinary skill in the art to practice.

Of course, other embodiments may be utilized, or any structural, logical, or electrical changes may be made without departing from the embodiments described herein. Therefore, the following detailed description is not to be considered as limiting, but the embodiments included therein are defined by the scope of the accompanying claims.

Please refer to FIG. 1 , which is a cross-sectional view of a solar cell module according to an embodiment of the present invention. As shown in FIG. 1, the solar cell module 1 of the present invention includes a plurality of conductive connectors 100 having an S-shaped cross-sectional profile or a serpentine cross-sectional profile. To simplify the description, only three conductive connectors 100a, 100b, and 100c are illustrated in FIG.

According to the present embodiment, each of the conductive connecting members 100 includes a first connecting groove 110 located at an upper portion 101 of each conductive connecting member 100, facing a first direction (for example, toward the left direction), and a second connecting groove. 120 is located at a lower portion 103 of each of the conductive connectors 100, facing a second direction (eg, toward the right direction). The first direction and the second direction are opposite to each other.

According to the present embodiment, the upper portion 101 and the lower portion 103 of each of the conductive connectors 100 are connected via an intermediate connection portion 102. According to the present embodiment, the body of the conductive connector 100 may be an integrally formed structure composed of the same material , for example, an integrally formed structure cast from a metal such as copper, aluminum, gold or silver, but is not limited thereto. The surface of the conductive connector 100 may also be subjected to surface treatment, for example, coating, polishing or roughening, etc., but is not limited thereto.

According to the present embodiment, the first connecting groove 110 has a first top surface 110a, a first side surface 110b and a first bottom surface 110c, and the second connecting groove 120 has a second top surface 120a, a first Two side surfaces 120b and a second bottom surface 120c.

The solar cell module 1 of the present invention comprises a plurality of solar cell units 200, which are respectively connected in series through a plurality of conductive connectors 100 to form a battery string. To simplify the description, only seven solar battery cells 200a to 200g are shown in FIG.

According to the present embodiment, for example, one end of the solar cell unit 200a is inserted into the first connecting recess 110 of the conductive connecting member 100a, and is electrically connected to the conductive connecting member 100a, and one end of the solar battery unit 200b is inserted into the conductive connecting member 100a. The second connecting groove 120 is electrically connected to the conductive connecting member 100a. More specifically, an upper electrode 211 of an upper surface (or light receiving surface) 210 of the solar cell unit 200a is electrically connected to the first top surface 110a of the first connecting recess 110 via a conductive member 310, and is located at the solar energy. The lower electrode 221 of a bottom surface 220 of the battery unit 200b is electrically connected to the second bottom surface 120c of the second connecting groove 120 via a conductive member 320. The thickness of the conductive member 310 and the conductive member 320 are both about 50 microns. Conductive members 310, 320 may be constructed of copper or other suitable electrically conductive material.

According to the present embodiment, a conductive adhesive layer 410 may be further disposed between the conductive member 310 and the first top surface 110a. A conductive adhesive layer 420 may be further disposed between the conductive member 320 and the second bottom surface 120c. For example, the conductive adhesive layers 410 and 420 may include silver paste or aluminum paste, but are not limited thereto.

An upper electrode 211 of the upper surface 210 of the solar cell unit 200b is connected to a conductive member 330, and a lower electrode 221 of the bottom surface 220 of the other solar cell unit 200c is connected to a conductive member 340, and the conductive member 330 and the conductive member are connected. The wires 340 are electrically connected together, for example, the conductive member 330 and the conductive member 340 may be electrically connected together by soldering or by a conductive paste (not shown). The thickness of the conductive member 330 and the conductive member 340 are both about 50 microns. Conductive members 330, 340 may be constructed of copper or other suitable electrically conductive material.

The other end of the solar cell unit 200c is inserted into the first connecting groove 110 of the conductive connecting member 100b, and the above connecting configuration is repeated, so that the solar cell unit 200c is connected in series to the solar cell unit 200d through the conductive connecting member 100b, and then continues to be connected to The solar battery unit 200e further connects the solar battery unit 200e to the solar battery unit 200f through the conductive connecting member 100c, and then continues to connect to the solar battery unit 200g.

According to the present embodiment, the solar cell units 200a, 200c, 200e, 200g are at the same level, while the solar cells 200b, 200d, 200f are at another level, for example, in this embodiment, the solar cell The cells 200a, 200c, 200e, 200g are located at a higher level, while the solar cells 200b, 200d, 200f are at a lower level. However, the difference between the two horizontal planes is small, approximately equal to the thickness of the intermediate connection portion 102 of each of the conductive connectors 100, for example, about 100 microns.

Referring to FIG. 2, which is a cross-sectional view of a solar cell module according to another embodiment of the present invention, wherein the same elements, regions or layers of materials are still denoted by the same reference numerals. As shown in FIG. 2, the solar cell module 2 also includes a plurality of conductive connectors 100 having an S-shaped cross-sectional profile or a serpentine cross-sectional profile. To simplify the description, only three conductive connectors 100a, 100b, and 100c are also illustrated in FIG.

According to the present embodiment, each of the conductive connecting members 100 includes a first connecting groove 110 located at an upper portion 101 of each conductive connecting member 100, facing a first direction (for example, toward the left direction), and a second connecting groove. 120 is located at a lower portion 103 of each of the conductive connectors 100, facing a second direction (eg, toward the right direction). The first direction and the second direction are opposite to each other.

According to the present embodiment, the upper portion 101 and the lower portion 103 of each of the conductive connectors 100 are connected via an intermediate connection portion 102. According to the present embodiment, the body of the conductive connector 100 may be an integrally formed structure composed of the same material , for example, an integrally formed structure cast from a metal such as copper, aluminum, gold or silver, but is not limited thereto. The surface of the conductive connector 100 may also be subjected to surface treatment, for example, coating, polishing or roughening, etc., but is not limited thereto.

According to the present embodiment, the first connecting groove 110 has a first top surface 110a, a first side surface 110b and a first bottom surface 110c, and the second connecting groove 120 has a second top surface 120a, a first Two side surfaces 120b and a second bottom surface 120c.

According to the present embodiment, an insulating layer 510 is disposed on at least the first side surface 110b and the first bottom surface 110c of the first connecting groove 110, wherein the insulating layer 510 may further extend to the first top surface 110a or extend to A side wall of the conductive member 310. According to the present embodiment, an insulating layer 520 is disposed on at least the second side surface 120b and the second top surface 120a of the second connecting groove 120, wherein the insulating layer 520 may further extend to the second bottom surface 120c or extend to A side wall of the conductive member 320. According to the present embodiment, the insulating layer 510 and the insulating layer 520 may include tantalum nitride, but are not limited thereto.

According to the present embodiment, the outer surface of the conductive connector 100 is plated with an optical reflective film. For example, on the outer surface of the upper portion 101 of the conductive connector 100, including a top surface 101a and a side surface 101b, an optical reflective film 610 is disposed. In addition, an optical reflective film 620 may be disposed on the outer surface of the lower portion 103 of the conductive connecting member 100, including a bottom surface 103a and a side surface 103b. The optical reflective film 610, 620 may include nickel, copper, aluminum, silver, gold. Or a combination of the above, or an alloy thereof. The outer surface of the conductive connector 100 is plated with optical reflective films 610, 620, which can increase the incidence of light IL on the light receiving surface of the solar cell, thereby increasing battery efficiency.

The solar cell module structure 2 of the present invention also includes a plurality of solar cell units 200, which are respectively connected in series through a plurality of conductive connectors 100 to form a battery string. In order to simplify the description, only seven solar battery cells 200a to 200g are also illustrated in Fig. 2 .

According to the present embodiment, for example, one end of the solar cell unit 200a is inserted into the first connecting recess 110 of the conductive connecting member 100a, and is electrically connected to the conductive connecting member 100a, and one end of the solar battery unit 200b is inserted into the conductive connecting member 100a. The second connecting groove 120 is electrically connected to the conductive connecting member 100a. More specifically, an upper electrode 211 of an upper surface (or light receiving surface) 210 of the solar cell unit 200a is electrically connected to the first top surface 110a of the first connecting recess 110 via a conductive member 310, and is located at the solar energy. The lower electrode 221 of a bottom surface 220 of the battery unit 200b is electrically connected to the second bottom surface 120c of the second connecting groove 120 via a conductive member 320.

According to the present embodiment, a conductive adhesive layer 410 may be further disposed between the conductive member 310 and the first top surface 110a. A conductive adhesive layer 420 may be further disposed between the conductive member 320 and the second bottom surface 120c. For example, the conductive adhesive layers 410 and 420 may include silver paste or aluminum paste, but are not limited thereto.

An upper electrode 211 of the upper surface 210 of the solar cell unit 200b is connected to a conductive member 330, and a lower electrode 221 of the bottom surface 220 of the other solar cell unit 200c is connected to a conductive member 340, and the conductive member 330 and the conductive member are connected. The wires 340 are electrically connected together, for example, the conductive member 330 and the conductive member 340 may be electrically connected together by soldering or with a conductive paste. The other end of the solar cell unit 200c is inserted into the first connecting groove 110 of the conductive connecting member 100b, and the above connecting configuration is repeated, so that the solar cell unit 200c is connected in series to the solar cell unit 200d through the conductive connecting member 100b, and then continues to be connected to The solar battery unit 200e further connects the solar battery unit 200e to the solar battery unit 200f through the conductive connecting member 100c, and then continues to connect to the solar battery unit 200g.

The solar cell module is designed by lamination, and the battery cells are connected to each other in a tighter manner through the conductive connecting members. The edges of the battery cells are slightly overlapped so that there is no gap between the batteries, so the same unit area is used. More batteries can be laid in, and the light absorption area is increased to further increase the power generation of the module. Moreover, through the connection of the conductive connectors, the two-dimensional array arrangement of the battery cells can be realized, and the battery module does not exhibit a stepped drop after assembly, which is more convenient in processing and can improve the process yield.

In addition, the solar cell module with the laminated design of the present invention connects the battery cells to each other in a tighter manner through the conductive connecting members, and does not require a soldering strip, thereby saving the cost of the soldering strip. The outer surface of the conductive connector is coated with an optical reflective film, which can increase the incidence of light on the light receiving surface of the solar cell, thereby increasing the efficiency of the battery.

The above descriptions are only preferred embodiments of the present invention, and all changes and modifications made by the scope of the patent application of the present invention should be covered by the present invention.

1, 2‧‧‧ solar battery module

100‧‧‧Electrical connectors

100a, 100b, 100c‧‧‧ conductive connectors

101‧‧‧ upper

101a‧‧‧ top

101b‧‧‧ side

102‧‧‧Intermediate connection

103‧‧‧ lower

103a‧‧‧ bottom

103b‧‧‧ side

110‧‧‧First connection groove

110a‧‧‧First top surface

110b‧‧‧ first side surface

110c‧‧‧ first bottom surface

120‧‧‧Second connection groove

120a‧‧‧Second top surface

120b‧‧‧Second side surface

120c‧‧‧second bottom surface

200‧‧‧Solar battery unit

200a~200g‧‧‧ solar battery unit

210‧‧‧ upper surface

211‧‧‧Upper electrode

220‧‧‧ bottom surface

221‧‧‧ lower electrode

310, 320, 330, 340‧‧‧ conductive parts

410, 420‧‧‧ conductive adhesive layer

510, 520‧‧‧ insulation

610, 620‧‧‧ optical reflective film

IL‧‧‧Light

FIG. 1 is a partial cross-sectional view showing a solar cell module according to an embodiment of the present invention. FIG. 2 is a partial cross-sectional view showing a solar cell module according to another embodiment of the present invention.

Claims (15)

A solar cell module comprising: a conductive connecting member, comprising a first connecting groove on an upper portion of the conductive connecting member facing a first direction, and a second connecting groove at a position of the conductive connecting member a first solar cell unit having one end inserted into the first connection groove and electrically connected to the conductive connection member; and a second solar battery unit having one end inserted into the second connection concave portion a slot and is electrically connected to the conductive connector. The solar cell module of claim 1, wherein the conductive connector has an S-shaped cross-sectional profile. The solar cell module of claim 1, wherein the conductive connector has a serpentine profile. The solar cell module of claim 1, wherein the first direction and the second direction are opposite to each other. The solar cell module of claim 1, wherein the first connecting groove has a first top surface, a first side surface and a first bottom surface, and the second connecting groove has a second top surface, a second side surface and a second bottom surface. The solar cell module of claim 5, wherein an upper electrode located on an upper surface of the first solar cell unit is electrically connected to the first top surface via a first conductive member. The solar cell module of claim 6, wherein a first conductive adhesive layer is disposed between the first conductive member and the first top surface. The solar cell module of claim 7, wherein the lower electrode located on a bottom surface of the second solar cell unit is electrically connected to the second bottom surface via a second conductive member. The solar cell module of claim 8, wherein a second conductive adhesive layer is disposed between the second conductive member and the second bottom surface. The solar cell module of claim 9, wherein the first conductive adhesive layer and the second conductive adhesive layer comprise silver paste or aluminum paste. The solar cell module of claim 5, further comprising a first insulating layer disposed on the first side surface and the first bottom surface. The solar cell module of claim 11, further comprising a second insulating layer disposed on the second side surface and the second top surface. The solar cell module of claim 12, wherein the first insulating layer and the second insulating layer comprise tantalum nitride. The solar cell module of claim 1, wherein the outer surface of the conductive connecting member is plated with an optical reflective film. The solar cell module of claim 14, wherein the optical reflective film comprises nickel, copper, aluminum, silver, gold or a combination thereof, or an alloy thereof.