WO2012162900A1

WO2012162900A1 - Solar cell module and manufacturing method thereof

Info

Publication number: WO2012162900A1
Application number: PCT/CN2011/075414
Authority: WO
Inventors: 章灵军; 沈坚; 王栩生
Original assignee: 苏州阿特斯阳光电力科技有限公司
Priority date: 2011-05-27
Filing date: 2011-06-07
Publication date: 2012-12-06
Also published as: JP2013542614A; CN102800723A; CN102800723B

Abstract

A solar cell module is provided, which includes a solar cell (10) with a first electrode and a second electrode (111) formed on one surface (11) of the solar cell, wherein the first electrode and the second electrode are separated from each other and the polarity of the second electrode is opposite to the polarity of the first electrode; an electric field arranged on the surface, wherein the polarity of the electric field is opposite to the polarity of the first electrode; a first conductive member (32), electrically connected to the first electrode; and an isolation layer (20), arranged between the surface of the solar cell and the first conductive member. Since an isolation layer is arranged between the back side of the solar cell and the first conductive member, a short circuit, caused by the contact of the first conductive member and the electric field at the back side of the solar cell, is avoided.

Description

The present invention claims the priority of the Chinese Patent Application entitled "Solar Cell Module and Its Manufacturing Method", filed on May 27, 2011, to the Chinese Patent Office, Application No. 201110140708.3, the entire contents of which are incorporated herein by reference. This is incorporated herein by reference. Technical field

The present invention relates to a solar cell module and a method of fabricating the same, and more particularly to a back contact solar cell module and a method of fabricating a back contact solar cell module. Background technique

A back contact solar cell (also referred to as a back electrode solar cell) refers to a silicon solar cell in which both the positive and negative electrodes of the cell are located on the back of the cell. Compared with the conventional silicon solar cell, since the main gate line is eliminated on the front side of the battery, the shading loss is reduced, thereby increasing the effective lighting area and improving the efficiency of the battery. In addition, since the positive and negative electrodes of the battery are located on the back of the battery, the connection and packaging of the battery are facilitated, and the manufacturing process is completed; and since the main grid line on the front side of the battery is reduced, the battery looks more beautiful from the front. Therefore, back-contact solar cells are getting more and more attention from the industry and gradually starting to use the industry.

If the back electric field is a positive electric field, in the manufacturing process of the back contact solar cell module, when the adjacent battery cells are electrically connected in series by the conventional electrical connection method, the electrical connection device connecting the negative electrodes is inevitably and positively The electric field contacts, thereby causing a short circuit; if the back electric field is a negative electric field, when the adjacent battery cells are electrically connected in series by a conventional electrical connection method, the electrical connection device connected to the positive electrode is also inevitably in contact with the negative electric field. Causes a short circuit. Therefore, how to solve the short-circuit problem that occurs when the back-contact solar cell modules are connected in series is an urgent problem to be solved by those skilled in the art. Summary of the invention

An object of the present invention is to provide a solar cell module capable of reliably insulating a first conductive member for connecting a first electrode disposed on a back surface of a solar cell from an electric field opposite to a polarity of the first electrode of the back surface, thereby Ensure that back-contact solar modules can be used in the industry.

It is still another object of the present invention to provide a method of manufacturing a solar cell module, which is capable of providing a first conductive member and a back surface for connecting a first electrode disposed on a back surface of a solar cell. An electric field of opposite polarity of the electrodes is reliably insulated to ensure that the back contact solar cell module can be industrially applied.

In order to achieve the above object, a solar cell module of the present invention includes a solar cell, and the solar cell is provided on one side surface thereof with a first electrode insulated from each other and the first electrode a second electrode opposite in polarity, and the surface is provided with an electric field opposite to the polarity of the first electrode; a first conductive member electrically connected to the first electrode; an insulating layer disposed on the surface of the solar cell And between the first conductive members.

As a further improvement of the invention, the insulating layer comprises an insulating strip detachable from the surface of the solar cell.

As a further improvement of the present invention, the insulating strip contains expandable polyethylene or a thermoplastic elastomer or a polyvinyl fluoride composite film or a silicon-based material.

As a further improvement of the present invention, the insulating strip is provided with a through hole, and the first conductive member is electrically connected to the first electrode through the through hole.

As a further improvement of the present invention, one end of the insulating strip extends beyond the edge of the surface of the solar cell.

As a further improvement of the present invention, the insulating layer includes an insulating material attached to the surface of the solar cell.

As a further improvement of the present invention, the insulating material comprises an insulating silica gel.

As a further improvement of the present invention, the first conductive member includes a longitudinally extending base tape and a projection projecting with respect to a plane in which the base tape is located.

As a further improvement of the present invention, the protruding portion is disposed corresponding to the first electrode, and protrudes into the through hole to be electrically connected to the first electrode.

As a further improvement of the present invention, the first electrode protrudes out of the surface.

As a further improvement of the present invention, the assembly further includes a plurality of second conductive members electrically connected to the second electrode.

As a further improvement of the present invention, the first electrode has a rectangular shape.

As a further improvement of the present invention, the assembly further includes an interconnecting conductive member to electrically connect the plurality of second conductive members. As a further improvement of the present invention, the first electrode is a negative electrode, the second electrode is a positive electrode, and the electric field is a positive electric field.

As a further improvement of the present invention, the first electrode is a positive electrode, the second electrode is a negative electrode, and the electric field is a negative electric field.

In order to achieve the above object, a solar cell module of the present invention includes a first solar cell and a second solar cell adjacent to the first solar cell, wherein the first and second solar cells are a front surface for receiving radiation and a back surface opposite to the front surface, and a first electrode, a second electrode opposite in polarity to the first electrode, and an electric field opposite in polarity to the first electrode are disposed on the back surface ;

a first conductive member electrically connected to the first electrode;

a second conductive member electrically connected to the second electrode;

An insulating layer disposed between the back surface of the first and second solar cells and the first conductive member;

The interconnecting conductive member electrically connects the second conductive member of the first solar cell and the first conductive member of the second solar cell.

As a further improvement of the present invention, the insulating strip is provided with a through hole corresponding to the first electrode, and the first conductive member is provided to protrude into the through hole and electrically electrically with the first electrode Connected projections.

As a further improvement of the present invention, the interconnecting conductive member is located on the back side of the first solar cell and is connected to the second conductive member on the back surface of the first solar cell.

As a further improvement of the present invention, the interconnecting conductive member is located on the back surface of the second solar cell and is connected to the first conductive member on the back surface of the second solar cell.

As a further improvement of the present invention, an insulating layer is provided between the interconnecting conductive member and the back surface of the second solar cell.

As a further improvement of the present invention, the first electrode is a negative electrode, the second electrode is a positive electrode, and the electric field is a positive electric field.

As a further improvement of the present invention, the first electrode is a positive electrode, the second electrode is a negative electrode, and the electric field is a negative electric field. In order to achieve the above object of the invention, a method of manufacturing a solar cell module of the present invention, the method comprising the steps of: providing a first solar cell and a second solar cell adjacent to the first solar cell, the first And the second solar cell are respectively provided on the one side surface thereof with a plurality of rows of first electrodes, a plurality of rows of second electrodes having opposite polarities from the first electrodes, and an electric field opposite to the polarity of the first electrodes, wherein each row is An electrode includes a plurality of first electrodes; a plurality of second conductive members are provided to respectively connect each of the second electrodes; and an insulating layer is provided around each of the first electrodes on the back surface of the first and second solar cells Providing a plurality of first conductive members to respectively connect each row of the first electrodes, the insulating layer being located between the first conductive members and the back surfaces of the first and second solar cells; providing an interconnecting conductive member to connect the first solar cells a second conductive member and a first conductive member of the second solar cell.

As a further improvement of the present invention, the providing the first conductive member includes processing the first conductive member to form a plurality of protrusions corresponding to each row of the first electrodes; and protruding the first conductive member The portion is electrically connected to each row of the first electrodes.

As a further improvement of the present invention, the providing the insulating layer comprises: coating the insulating material at a position of the first conductive member outside the first electrode of each row on the surface of the first and second solar cells .

As a further improvement of the present invention, the providing the insulating layer includes: providing an insulating strip on the surface of the first and second solar cells at a position of the first conductive member, the insulating strip being pre-opened and Each row of the first electrode corresponds to a through hole.

Compared with the prior art, the beneficial effects of the present invention are: by providing an insulating layer between the back surface of the solar cell and the first conductive member, the first conductive member connecting the first electrode and the back surface of the battery and the first electrode can be avoided. A short circuit occurs due to the opposite electric field contact, thereby ensuring that the back contact solar cell module can realize industrial applications. DRAWINGS

1 is a schematic plan view of a back surface of a solar cell according to an embodiment of the present invention; FIG. 2 is a plan view showing an insulating strip for insulating between a negative electrode conductive member and a back surface of a solar cell according to an embodiment of the present invention; Figure 3 is a plan view showing the insulating strip shown in Figure 2 mounted on the back surface of the solar cell shown in Figure 1;

Figure 4 is a side view of a negative electrode conductive member in an embodiment of the present invention;

Figure 5 is a plan view showing the negative electrode conductive member shown in Figure 4 mounted on the back surface of the solar cell shown in Figure 3;

Figure 6 is a plan view showing further mounting of the positive electrode conductive member and the interconnecting conductive member on the back surface of the solar cell shown in Figure 4;

Figure 7 is a plan view showing the connection of two adjacent battery sheets in an embodiment of the present invention; Figure 8 is a cross-sectional view showing a solar cell module in an embodiment of the present invention; Figure 9 is similar to Figure 7, An insulating layer is also disposed between the interconnecting conductive member and the back surface of the solar cell.

detailed description

The following is a metallization Wrap Through (MWT) back-to-back and is not limited to MWT back contact solar cells, which can also be applied to other types of back contact solar cells, such as Metallization Wrap Around (MWA). Back-contact solar cells, or Emitter Wrap Through (EWT) back-contact solar cells.

The solar cell module is configured to absorb light energy and convert the light energy into an electrical energy output, which may be a large-area battery assembly formed by arranging a plurality of solar cells in series and arranging them in a square array. Figure 1 shows the back side 11 of a solar cell 10 using metal penetration (MWT) technology. A solar cell is generally composed of two or more semiconductor wafers, and the semiconductor material is usually silicon, such as single crystal silicon, polycrystalline silicon, amorphous silicon, or the like. When the front side of the solar cell receives the irradiation of light, the accumulation of the opposite charge occurs at both ends of the battery, that is, the "photogenerated voltage" is generated, which is the "photovoltaic effect". Under the action of the photovoltaic effect, the two ends of the battery An electromotive force is generated to convert light energy into electrical energy. For MWT solar cells, the front side of the cell (not shown) is typically provided with a plurality of parallel grids of metal grid lines (not shown) to collect the generated photo-generated current after exposure to the received light. The back surface 11 of the battery is provided with a positive electrode 111 and a negative electrode 112, since the back side of the battery passes through the printed aluminum The slurry forms a positive electric field, so the negative electrode needs to be insulated from the positive electrode and the positive electric field in a certain manner. For example, an insulating region (not shown) is formed around the negative electrode 112 as shown in FIG. 1 to prevent the negative electrode from being electrically connected to the surrounding positive electric field. The insulating region may be formed by laser etching or may be formed by other means. The negative electrode 112 and the metal gate line on the front side are connected by a through hole (not shown) penetrating through the battery, and the through hole can be obtained by a laser drilling technique, and a metal plating layer is formed on the inner surface of the through hole, so that the metal grid on the front side The line is electrically connected to the negative electrode on the back side, thereby transferring the photo-generated current collected by the metal gate line to the negative electrode. Since the MWT technology is well known to those skilled in the art, as described in European Patent No. EP 0 985 233 B1, filed on Feb. 21, 2007, the disclosure of which is hereby incorporated by reference herein.

As shown in FIG. 1 , in the embodiment, a plurality of rows of positive electrodes 111 and a plurality of rows of negative electrodes 112 are arranged on the back surface of the battery, wherein each row of the positive electrode 111 / the negative electrode 112 includes at least two spaced apart from each other. The electrode terminal is provided, and the electrode terminal has a rectangular shape and protrudes from the back surface of the battery. Of course, those skilled in the art can easily imagine that in other embodiments, the shapes, the number, and the arrangement of the positive and negative electrodes 111, 112 may vary depending on different design requirements.

Referring to FIGS. 2 to 7, in addition to the solar cell 10, the solar cell module further includes a plurality of positive electrode conductive members 31 and a plurality of negative electrode conductive members 32 for respectively connecting each row of the positive electrode 111 and the negative electrode 112, and is disposed at the negative electrode. An insulating layer between the member 32 and the back surface 11 of the solar cell, and an interconnecting conductive member 33 for electrically connecting between adjacent solar cells 10.

As an embodiment of the insulating layer shown in FIG. 2, in the present embodiment, the insulating layer is an insulating strip 20 that can be detached from the back surface 11 of the solar cell 10. The insulating strip 20 is made of an insulating material such as Expandable Polyethylene (EPE), or Thermoplastic Elastomer (TPE), or a polyvinyl fluoride composite film (TPT) or a silicon-based material. The insulating strip 20 has a strip shape and has a body 21, and a through hole 22 corresponding to each row of negative electrodes 112 is opened on the body 21, wherein the interval between the adjacent two through holes 22 and the corresponding adjacent two The spacing of the negative electrodes 112 is comparable, and the through holes 22 are also rectangular in shape, corresponding to the size of the negative electrode 112. It should be noted that the "equal" mentioned in the foregoing and the following texts are identical and also include substantially the same within the allowable range. For example, the spacing of adjacent through holes 22 may be slightly larger than the corresponding The spacing of adjacent negative electrodes 112 only needs to ensure that the negative electrode 112 can be exposed in the through holes; the size of the through holes 22 can be slightly smaller than the size of the negative electrode 112. In addition, those skilled in the art can easily think that the shape of the through hole 22 can also be inconsistent with the negative electrode 112. For example, the through hole 22 can be circular, and the diameter of the circular circle is smaller than or equal to the short side of the rectangular shape of the negative electrode 112. can. In addition, in other embodiments, the insulating layer may be an insulating material attached to the back surface 11 of the solar cell 10, such as insulating silica gel or the like around the negative electrode, which is also effective in the negative electrode conductive member 32 and the sun. An electrical barrier is achieved between the back side 11 of the battery 10.

In the present embodiment, both the positive electrode conductive member 31 and the negative electrode conductive member 32 are in the form of a solder ribbon 30. As shown in Fig. 4, the ribbon 30 is a metal strip comprising an elongated strip base 301 and a plurality of projections 302 projecting relative to the plane in which the base strip is located. The number of the projections 302 on the solder ribbon for the positive or negative conductive member 31 and the interval between the adjacent projections are respectively different from the number of the positive and negative electrodes 111 and 112 and the adjacent electrode terminals of each row. The interval is equivalent. The protrusions 302 are mainly used to pass through the through holes on the insulating layer when the solder ribbon 30 is mounted on the back surface 11 of the solar cell 10, and are fixedly connected to the corresponding electrode terminals to form an electrical contact, as in the embodiment. Welding. The projections 302 may be formed integrally with the base tape 301, such as by bending or stamping; or may be provided in an additional form on the base tape, such as by welding a bump on the surface of the base tape. In the present embodiment, the ribbon can be previously cut to a width corresponding to the rectangular width of the electrode terminal, and then the projection can be formed by bending the base tape, thereby facilitating the production of the solar cell module. Since the insulating layer is not disposed between the positive electrode conductive member 31 and the rear surface 11 of the solar cell, the positive electrode conductive member 31 can be a solder ribbon which does not require bending, that is, the protruding portion is omitted. Further, in other embodiments, the positive electrode conductor may be omitted, i.e., an elongated positive electrode is formed directly on the back surface 11 of the solar cell. In addition, in other embodiments, the plurality of negative electrodes of each row are elongated, that is, an integral strip-shaped negative electrode is formed, and the through holes 22 of the insulating layer 20 are also correspondingly arranged in a strip. For the through hole, the base tape 301 only needs to have an elongated protrusion 302 corresponding to the elongated through hole. In the present embodiment, the interconnecting conductive member 33 is used to realize interconnection between the positive and negative conductive members 31, 32 of adjacent solar cells, which may take the form of a metal strip.

3, FIG. 5, FIG. 6, and FIG. 7, when assembling, the insulating strip 20 is first mounted to the back surface 11 of the solar cell 10, wherein the through hole 22 on the insulating strip 20 and the corresponding negative electrode 112 are provided. Aligned, one end 25 of the insulating strip 20 extends beyond the edge 115 of the solar cell 10 and can be further attached to the back side of an adjacent solar cell (as shown in Figure 7). Then, the negative electrode conductive member 32 is attached to the back surface 11 of the solar cell, wherein the projection on the negative electrode conductive member is welded to the corresponding negative electrode, since the insulating strip 20 is disposed between the negative electrode conductive member 32 and the back surface 11 of the solar cell, Further, the insulating strip 20 blocks the contact between the negative electrode conductive member 32 and the rear surface 11 of the solar cell in the longitudinal direction and the lateral width direction, thereby effectively insulating the negative electrode conductive member 32 from the positive electric field of the back surface 11 of the solar cell. Thereafter, the positive electrode conductive member 31 is attached to the back surface 11 of the solar cell, wherein the projections on the positive electrode conductive member are welded to the corresponding positive electrode 111. Of course, in other embodiments, the order in which the positive electrode conductive member 31 and the negative electrode conductive member 32 are mounted to the back surface 11 of the solar cell may be changed; or the negative electrode conductive member 32 may be assembled with the insulating strip 20 first, and then the two are mounted together to the sun. On the back of the battery 11 .

Referring to the connection of two adjacent solar cells shown in FIG. 6 and FIG. 7, of course, the solar cell module usually includes a dozen or dozens of solar cells connected in this way, and only the two adjacent ones are taken as an example. Description. In this embodiment, the interconnecting conductive member 33 first electrically connects the plurality of positive conductive members 311 on the back surface of the first solar cell 101, and then to the plurality of negative conductive members 322 extending from the back surface of the second solar battery 102. Realize electrical connection. Since the interconnecting conductive member 33 is first connected to the positive electrode conductive member 311, the interconnecting conductive member can be in direct contact with the back surface of the solar cell without insulation. Of course, in other embodiments, as shown in FIG. 9, the interconnecting conductive member 33 may also be first connected to the negative conductive member 322 of the second solar cell 102, and then to the positive conductive member 311 on the first solar cell 101. The connection is only required to provide an insulating layer 29 between the interconnecting conductive member 33 and the back surface of the second solar cell 102, and the insulating layer can be disposed in the same manner as the above-mentioned insulation disposed between the negative conductive member and the back surface of the solar cell. The layers are the same and will not be repeated here. In addition, the interconnecting conductive member may be disposed on the back side of the first solar cell or on the back side of the second solar cell. Since the end portion 25 of the insulating strip 20 further extends beyond the edge 115 of the second solar cell 102 and overlaps the back surface of the first solar cell 101, the negative electrode conductive member 322 is blocked by the insulating strip 20 from the front of the solar cell. It was seen to ensure the aesthetics of the solar module.

A schematic cross-sectional view of the solar cell module after lamination and packaging shown in FIG. 8 is used. Located at the bottom of the back of the solar cell module 100 is a backsheet 40 for protecting the package, which may be made of a polyvinyl fluoride composite film (TPT). Located at the top of the front of the solar cell module 100 is a permeable glass, typically tempered glass. Located in the middle of the solar cell module 100 are a plurality of solar cells 10 interconnected as mentioned in the above embodiment, an insulating strip 20 disposed on the back of the solar cell, and a solder ribbon 30 for the positive and negative conductive members. Located on the upper and lower sides of the solar cell 10, respectively, a hot melt adhesive such as ethylene-vinyl acetate copolymer (EVA), which has a certain elasticity, can enclose the solar cell therein, and the upper glass and the lower layer back The plates are bonded together. The surface is n-type silicon, and the back surface is p-type silicon. The solar cell of this structure forms a negative electric field on the front side and a positive electric field on the back side, so the negative electrode on the back side (the electrode having the opposite polarity to the back surface electric field is defined as the first electrode) Correspondingly, the electrode having the opposite polarity to the first electrode is the second electrode) and the negative electrode conductive member (the conductive member connecting the first electrode is defined as the first conductive member, and the conductive member connecting the second electrode is defined as the second conductive member) Piece) needs to be effectively insulated from the positive electric field. For the solar cell of the p+/n structure, since the front surface of the solar cell is p-type silicon and the back side is n-type silicon, a positive electric field is formed on the front surface of the solar cell, and a negative electric field is formed on the back surface. The invention can also be applied to a solar cell of p+/n structure. At this time, it is necessary to effectively insulate the positive electrode (first electrode) and the positive electrode conductive member (first conductive member) located on the back surface from the negative electric field on the back surface, and the insulation method thereof is The same is true in the above embodiments, and the applicant will not repeat them here.

By providing an insulating layer between the back surface of the solar cell and the first conductive member, the first conductive member connected to the first electrode can be prevented from short-circuiting with an electric field opposite to the polarity of the first electrode on the back side of the battery, thereby ensuring a back contact type. Solar cell modules enable industrial applications.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the invention is defined by the appended claims All changes in the meaning and scope of equivalent elements are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim. In addition, it should be understood that although the description is described in terms of embodiments, not every embodiment includes only one independent technical solution, and the description of the specification is merely for the sake of clarity, and those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments may also be combined as appropriate to form other embodiments that can be understood by those skilled in the art.

Claims

Rights request

A solar cell module (100), characterized in that the component comprises:

a solar cell (10), the solar cell is provided on one side surface (11) with a first electrode (112) insulated from each other and a second electrode (111) opposite in polarity to the first electrode, and The surface is provided with an electric field opposite to a polarity of the first electrode;

a first conductive member (32) electrically connected to the first electrode;

An insulating layer (20) is disposed between the surface (11) of the solar cell and the first conductive member (32).

The solar cell module according to claim 1, wherein the insulating layer comprises an insulating strip (20) detachable from the surface of the solar cell.

The solar cell module according to claim 2, wherein the insulating strip contains expandable polyethylene or a thermoplastic elastomer or a polyvinyl fluoride composite film or a silicon-based material.

The solar cell assembly according to claim 2, wherein the insulating strip (20) is provided with a through hole (22), and the first conductive member (32) is electrically connected to the first electrode through the through hole. .

The solar cell module according to claim 2, wherein one end (25) of the insulating strip extends beyond an edge of the surface of the solar cell.

The solar cell module according to claim 1, wherein the insulating layer comprises an insulating material attached to the surface of the solar cell.

The solar cell module according to claim 6, wherein the insulating material comprises insulating silica gel.

The solar cell module according to claim 4, wherein the first conductive member comprises a longitudinally extending base strip (301) and a protrusion (302) protruding from a plane in which the base strip is located.

The solar cell module according to claim 8, wherein the protruding portion is provided corresponding to the first electrode, and protrudes into the through hole to be electrically connected to the first electrode.

The solar cell module according to claim 1, wherein the first electrode protrudes from the surface (11).

11. The solar cell module of claim 1, wherein: the assembly further comprises a plurality of second conductive members electrically connected to the second electrode.

The solar cell module according to any one of claims 1 to 11, characterized in that The first electrode has a rectangular shape.

13. The solar cell assembly of claim 11, wherein: the assembly further comprises an interconnecting conductive member to electrically connect the plurality of second conductive members.

The solar cell module according to claim 1, wherein the first electric electrode is a negative electrode, the second electrode is a positive electrode, and the electric field is a positive electric field.

The solar cell module according to claim 1, wherein the first electric electrode is a positive electrode, the second electrode is a negative electrode, and the electric field is a negative electric field.

16. A solar cell module, characterized in that the component comprises:

a first solar cell (101) and a second solar cell (102) adjacent to the first solar cell, the first and second solar cells each including a front surface for receiving radiation and opposite to the front surface a back surface (11), and a first electrode (112), a second electrode (111) having a polarity opposite to the first electrode, and an electric field opposite in polarity to the first electrode are disposed on the back surface;

a first conductive member (32) electrically connected to the first electrode;

a second conductive member (31) electrically connected to the second electrode;

An insulating layer (20) disposed between the back surface (11) of the first and second solar cells and the first conductive member (32);

The interconnecting conductive member (33) electrically connects the second conductive member of the first solar cell and the first conductive member of the second solar cell.

The solar cell module according to claim 16, wherein: the insulating strip (20) is provided with a through hole (22) corresponding to the first electrode, and the first conductive member (32) A protrusion (302) protruding into the through hole and electrically connected to the first electrode is provided.

18. The solar cell module according to claim 16, wherein: the interconnecting conductive member (33) is located on a back surface of the first solar cell (101) and with a second conductive member on the back surface of the first solar cell (311) Connection.

19. The solar cell assembly of claim 16, wherein: the interconnecting conductive member (33) is located on a back side of the second solar cell (102) and first on the back side of the second solar cell The conductive members (322) are connected.

The solar cell module according to claim 19, wherein an insulating layer is provided between the interconnecting conductive member (33) and the back surface of the second solar cell (102).

The solar cell module according to claim 16, wherein the first electric electrode is a negative electrode, the second electrode is a positive electrode, and the electric field is a positive electric field.

The solar cell module according to claim 16, wherein the first electric electrode is a positive electrode, the second electrode is a negative electrode, and the electric field is a negative electric field.

23. A method of fabricating a solar cell module, the method comprising the steps of:

Providing a first solar cell (101) and a second solar cell (102) adjacent to the first solar cell, the first and second solar cells respectively having a plurality of rows on one side surface (11) thereof a first electrode (112), a plurality of rows of second electrodes (111) of opposite polarity to the first electrode, and an electric field of opposite polarity to the first electrode, wherein each row of the first electrodes comprises a plurality of first electrodes; Providing a plurality of second conductive members (31) to respectively connect each row of second electrodes;

Providing an insulating layer (20) around each row of first electrodes on the back surface (11) of the first and second solar cells;

Providing a plurality of first conductive members (32) for respectively connecting each row of first electrodes, the insulating layer being located between the first conductive member and the first and second solar cell back surfaces (11);

An interconnecting conductive member (33) is provided to connect the second conductive member of the first solar cell and the first conductive member of the second solar cell.

The method of manufacturing a solar cell module according to claim 23, wherein the step of providing the first conductive member comprises:

Processing the first conductive member to form a plurality of protrusions corresponding to each row of first electrodes

(302);

The protruding portion of the first conductive member is electrically connected to each row of the first electrodes.

The method of manufacturing a solar cell module according to claim 23, wherein the step of providing an insulating layer (20) comprises, on each of the surfaces of the first and second solar cells, in each row The first conductive member outside the first electrode (112) is coated with an insulating material at a position where the first conductive member is located.

The method of manufacturing a solar cell module according to claim 23, wherein the step of providing the insulating layer (20) comprises: positioning the first conductive member on the surface of the first and second solar cells An insulating strip (20) is provided at the position, and the through hole (22) corresponding to each row of the first electrode is pre-opened on the insulating strip.