CN213958977U

CN213958977U - Photovoltaic module

Info

Publication number: CN213958977U
Application number: CN202023346326.XU
Authority: CN
Inventors: 吴艳芬; 贾行; 陈辉; 董经兵
Original assignee: CSI Cells Co Ltd; Canadian Solar Manufacturing Changshu Inc
Current assignee: CSI Cells Co Ltd; Canadian Solar Manufacturing Changshu Inc; CSI Solar Technologies Inc
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-08-13
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a photovoltaic module, photovoltaic module includes: a battery piece; a plurality of interconnection structures, a plurality of the interconnection structures are all connected on one side surface of the battery piece, and the minimum distance between the end of at least two of the plurality of the interconnection structures and the corresponding edge of the battery piece is unequal. According to the utility model discloses a photovoltaic module, through making a plurality of interconnected structure all connect on one side of battery piece is surperficial, and the minimum distance between the tip of two at least in a plurality of interconnected structure and the corresponding edge of battery piece is unequal, makes photovoltaic module's simple structure, can reduce the requirement to a plurality of interconnected structure's alignment degree, makes things convenient for photovoltaic module's processing to can improve photovoltaic module's production efficiency.

Description

Photovoltaic module

Technical Field

The utility model belongs to the technical field of photovoltaic manufacturing technology and specifically relates to a photovoltaic module is related to.

Background

In the related art, under the background of increasingly serious energy crisis and environmental pollution, photovoltaic power generation is increasingly favored by governments of various countries as a green and environment-friendly renewable energy source. Among them, a photovoltaic module is a core part of a photovoltaic power generation system, and a plurality of cells of the photovoltaic module are generally connected by an interconnection structure member such as a solder ribbon. However, the existing photovoltaic module is inconvenient to process and low in production efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a photovoltaic module, photovoltaic module simple structure, processing is convenient, has higher production efficiency.

According to the utility model discloses photovoltaic module, include: a battery piece; a plurality of interconnection structures, a plurality of the interconnection structures are all connected on one side surface of the battery piece, and the minimum distance between the end of at least two of the plurality of the interconnection structures and the corresponding edge of the battery piece is unequal.

According to the utility model discloses photovoltaic module, through making a plurality of interconnect structure all connect on one side of battery piece is surperficial, and the minimum distance between the tip of two at least among a plurality of interconnect structure and the corresponding edge of battery piece is unequal, makes photovoltaic module's simple structure, can reduce the requirement to a plurality of interconnect structure's alignment degree, makes things convenient for photovoltaic module's processing to can improve photovoltaic module's production efficiency.

According to some embodiments of the invention, the minimum distance between the end of each of the interconnecting structure and the corresponding edge of the cell sheet is d₁Wherein d is₁Satisfies the following conditions:0mm≤d₁≤4mm。

according to some embodiments of the present invention, the battery piece is a plurality of battery pieces, two adjacent battery pieces in the plurality of battery pieces are a first battery piece and a second battery piece respectively, one end of each of the interconnection structures is connected to the front surface of the first battery piece, the other end of each of the interconnection structures is connected to the back surface of the second battery piece, and the minimum distance between the one end of at least two of the interconnection structures and one side edge of the first battery piece away from the second battery piece is different; and/or the minimum distance between the other end of at least two of the plurality of the interconnection structures and one side edge of the second battery piece far away from the first battery piece is not equal.

According to some embodiments of the utility model, every the interconnect structure includes anti-light section, first linkage segment and first changeover portion, the shape of anti-light section is non-platykurtic, the shape of first linkage segment is the platykurtic, first changeover portion connects anti-light section with between the first linkage segment, anti-light section connects the front of first battery piece, at least a part of first linkage segment connects the back of second battery piece.

According to some embodiments of the present invention, the first transition section is located on the front surface of the first battery piece, and the first transition section is connected to the first connection section and the first battery piece.

According to some embodiments of the invention, each of the first transition section of the interconnection structure with the end of the first connection section that is connected to the first connection section and the minimum distance between the corresponding edges of the first cell pieces is d₂Wherein d is₂Satisfies the following conditions: d is not less than 0mm₂≤8mm。

According to some embodiments of the invention, a portion of the first connection section of at least one of the interconnection structures is located on a front side of the first cell piece.

According to some embodiments of the utility model, every the interconnect structure still includes second linkage segment and second changeover portion, the shape of second linkage segment is the platykurtic, the second linkage segment is located keeping away from of reflection of light section the one end of first linkage segment, the second changeover portion is connected the second linkage segment with between the reflection of light section, the second linkage segment with the second changeover portion all is located the front of first battery piece, and is a plurality of at least two in the interconnect structure the free end of second linkage segment with minimum distance between the corresponding edge of first battery piece is not equal.

According to some embodiments of the utility model, every interconnect structure with be equipped with a plurality of pads between the battery piece, it is a plurality of in the pad with the edge distance of first battery piece is nearest to be first pad, at least one end of anti-light section extends to and surpasss correspondingly first pad.

According to some embodiments of the present invention, the number of the interconnection structure on the side surface of the battery piece is N, wherein N satisfies: n is more than or equal to 5 and less than or equal to 9.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a cell sheet and an interconnection structure of a photovoltaic module according to an embodiment of the present invention;

FIG. 2 is an enlarged view of portion A circled in FIG. 1;

FIG. 3 is an enlarged view of portion B circled in FIG. 1;

FIG. 4 is an enlarged view of the circled portion C of FIG. 1;

fig. 5 is an enlarged view of a portion D circled in fig. 1.

Reference numerals:

1: a battery piece; 2: an interconnecting structural member; 21: a light reflecting section;

22: a first connection section; 23: a first transition section;

24: a second connection section; 25: a second transition section;

3: a pad; 31: a first bonding pad.

Detailed Description

Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.

A photovoltaic module according to an embodiment of the present invention is described below with reference to fig. 1 to 5.

As shown in fig. 1, 2 and 4, a photovoltaic module according to an embodiment of the present invention includes a cell sheet 1 and a plurality of interconnected structural members 2. In the description of the present invention, "a plurality" means two or more. The interconnection structure 2 may be a metal conductive wire commonly used in the photovoltaic field, and the material may be a copper wire, or a tin-plated copper wire, or a conductive wire whose surface is plated with a low-temperature alloy, such as a low-temperature solder strip or a bus bar plated with metals such as nickel and lead.

Specifically, a plurality of interconnection structures 2 are each connected on one side surface of the battery sheet 1, and the minimum distances between the end portions of at least two of the plurality of interconnection structures 2 and the respective edges of the battery sheet 1 are not equal. Here, the "corresponding edge of the cell sheet 1" may be understood as an edge of the cell sheet 1 corresponding to the welding start end of the interconnection structure member 2 on the cell sheet 1. For example, in the example of fig. 1, a plurality of interconnection structures 2 are arranged at regular intervals on one side surface of a cell sheet 1, each interconnection structure 2 extends along the arrangement direction of the plurality of interconnection structures 2, and the corresponding edge of the cell sheet 1 refers to the edge of the cell sheet 1 closest to the end of the interconnection structure 2 along the extension direction of the interconnection structure 2.

From this, through the aforesaid setting, minimum distance inequality between the tip of two at least interconnected structure 2 and the corresponding edge of battery piece 1 to can need not to guarantee the alignment degree that is located the tip of a plurality of interconnected structure 2 on the same side surface of battery piece 1, can improve the connection speed between a plurality of interconnected structure 2 and the battery piece 1, make photovoltaic module convenient processing more, and then can effectively improve photovoltaic module's production efficiency, increase the productivity.

According to the utility model discloses photovoltaic module, through making a plurality of interconnected structure 2 all connect on one side surface of battery piece 1, and the minimum distance between the tip of two at least in a plurality of interconnected structure 2 and the corresponding edge of battery piece 1 is unequal, photovoltaic module's simple structure can reduce the requirement to a plurality of interconnected structure 2's alignment degree, makes things convenient for photovoltaic module's processing to can improve photovoltaic module's production efficiency.

In some optional embodiments of the present invention, referring to fig. 1, the number of the interconnection structures 2 on the above-mentioned one side surface of the battery piece 1 is N, where N satisfies: n is more than or equal to 5 and less than or equal to 9. Thus, by making N satisfy: n is more than or equal to 5 and less than or equal to 9, the plurality of interconnected structural members 2 can effectively collect the current generated by the cell 1, the shielding of the cell 1 can be reduced, and the photovoltaic module is ensured to have higher output power.

Five interconnecting structural members 2 are shown in fig. 1 for illustrative purposes, but it is obvious that a person skilled in the art after reading the technical solution of the present application may apply the solution to other numbers of interconnecting structural members 2, which also falls within the scope of the present invention.

In some embodiments of the present invention, referring to fig. 2 and 3, the minimum distance between the end of each interconnection structure 2 and the corresponding edge of the cell sheet 1 is d₁Wherein d is₁Satisfies the following conditions: d is not less than 0mm₁Less than or equal to 4 mm. Specifically, for example, when d₁At > 4mm, the minimum distance between the end of the interconnecting structural member 2 and the corresponding edge of the cell sheet 1 is too large, and the current generated by the photovoltaic effect of the cell sheet 1 cannot be collected on the interconnecting structural member 2, which may cause blackening at the edge of the cell sheet 1. Thereby, by making d₁Satisfies the following conditions: d is not less than 0mm₁Less than or equal to 4mm, can avoid influencing the collection of electric current to can improve photovoltaic module's current collection efficiency, make photovoltaic module have higher output.

In some embodiments of the present invention, the battery piece 1 is multiple, two adjacent battery pieces 1 are the first battery piece and the second battery piece respectively, one end of each interconnecting structure 2 is connected to the front surface of the first battery piece (i.e. the main incident light surface of the sun), and the other end of each interconnecting structure 2 is connected to the back surface of the second battery piece, so as to realize the series connection of the first battery piece and the second battery piece.

Wherein the minimum distance between the one end of at least two of the plurality of interconnecting structural members 2 and one side edge of the first battery piece far away from the second battery piece is not equal; and/or the minimum distance between the other end of at least two of the plurality of interconnecting structural members 2 and one side edge of the second cell piece away from the first cell piece is not equal.

For example, the side edge of the first cell piece away from the second cell piece is a first edge, and the minimum distance between the end of each interconnecting structural member 2 adjacent to the first edge and the first edge is a first end distance. The side edge of the second cell piece remote from the first cell piece is a second edge, and the minimum distance between the end of each interconnecting structural member 2 adjacent to the second edge and the second edge is a second end distance. Wherein, the distances of the first ends of at least two of the plurality of interconnected structural members 2 are not equal, and the distances of the second ends of the plurality of interconnected structural members 2 are all equal; alternatively, the distances of the second ends of at least two of the plurality of interconnecting structural members 2 are not equal, and the distances of the first ends of the plurality of interconnecting structural members 2 are all equal, or the distances of the first ends of at least two of the plurality of interconnecting structural members 2 are not equal, and the distances of the second ends of at least two of the plurality of interconnecting structural members 2 are not equal.

With the arrangement, the minimum distances between the ends of the at least two interconnection structural members 2 connected to the front side of the cell 1 and the corresponding edges of the cell 1 are unequal, and/or the minimum distances between the ends of the at least two interconnection structural members 2 connected to the back side of the cell 1 and the corresponding edges of the cell 1 are unequal, so that the requirement on the alignment degree of at least one end of the plurality of interconnection structural members 2 can be reduced, and the processing efficiency of the photovoltaic module can be effectively improved.

In some optional embodiments of the present invention, referring to fig. 4 and 5, each interconnecting structure 2 includes a light reflecting section 21, a first connecting section 22 and a first transition section 23, the first connecting section 22 is flat, the light reflecting section 21 is non-flat, the first transition section 23 is connected between the light reflecting section 21 and the first connecting section 22, the light reflecting section 21 is connected to the front surface of the first battery piece, and at least a portion of the first connecting section 22 is connected to the back surface of the second battery piece. The "flat shape" is understood to mean a flat and thin shape, and the dimension in the thickness direction is relatively small compared to the dimension in the width direction.

Therefore, as the first connecting section 22 is flat, the first connecting section 22 has a larger width and a smaller thickness, and when the first connecting section 22 is welded with the second battery piece, the contact area between the first connecting section 22 and the second battery piece can be increased, so that the first connecting section 22 and the second battery piece have a larger welding tension, and the connection is firmer. Moreover, the thickness of the back side packaging material can be reduced, thereby reducing the risk of subfissure of the battery piece 1. In addition, because the shape of the light reflecting section 21 is non-flat, the shielding area of the light reflecting section 21 to the cell 1 can be reduced, the reflectivity is improved, and the output power of the photovoltaic module is improved. In addition, through setting up foretell first changeover portion 23, be favorable to realizing the transition between reflection of light section 21 and the first linkage segment 22, avoid the junction fracture of reflection of light section 21 and first linkage segment 22, make whole interconnected structure 2 have higher structural strength to can improve photovoltaic module's reliability.

In some embodiments of the present invention, as shown in fig. 4, the first transition section 23 is located on the front surface of the first battery plate, and the minimum distance between the end of the first transition section 23 connected to the first connection section 22 of at least two of the plurality of interconnection structures 2 and the corresponding edge of the first battery plate is different. So set up, can reduce the requirement of the alignment degree to the one end that links to each other with first linkage segment 22 of the first changeover portion 23 of a plurality of interconnected structure pieces 2 to again make things convenient for photovoltaic module's processing, can effectively improve photovoltaic module's production efficiency.

In a further embodiment of the invention, reference is made to4 and 5. the minimum distance between the end of the first transition section 23 of each interconnecting structural member 2 connected to the first connecting section 22 and the corresponding edge of the first cell sheet is d₂Wherein d is₂Satisfies the following conditions: d is not less than 0mm₂Less than or equal to 8 mm. For convenience of description, the "minimum distance between one end of the first transition section 23 of each interconnection structure 2 connected to the first connection section 22 and the corresponding edge of the first cell piece" will be referred to as a "transition distance" hereinafter.

Specifically, for example, when d₂When the distance is 0mm, the transition distance is zero, and one end of the first transition section 23 connected with the first connecting section 22 is flush with the corresponding edge of the battery piece 1; d₂When the thickness is more than 0mm, the first transition section 23 is spaced from the corresponding edge of the battery piece 1, and a part of the first connecting section 22 can be positioned on the front surface of the first battery piece if d₂If the width is larger than 8mm, the transition distance is too large, so that the part of the first connecting section 22 connected to the front surface of the first battery piece is too large, the shielding area of the front surface of the first battery piece is increased, and the reflectivity is reduced. Thereby, by making d₂Satisfies the following conditions: d is not less than 0₂Less than or equal to 8mm, the distance between the corresponding edge of first changeover portion 23 and first battery piece is reasonable, can reduce the positive area that shelters from of interconnection structure 2 to first battery piece to can effectively improve photovoltaic module's output.

In some alternative embodiments of the present invention, as shown in fig. 4 and 5, a portion of the first connection segment 22 of the at least one interconnection structure 2 is located on the front surface of the first battery piece. Therefore, since the first connecting section 22 is flat, the contact area between the interconnecting structural member 2 and the first battery plate can be increased, and the connection between the interconnecting structural member 2 and the first battery plate is firmer. Moreover, when the interconnecting structural member 2 is offset in the direction from the light reflecting section 21 toward the first connecting section 22, the part of the first connecting section 22 may extend to the back surface of the second cell, so that the first transition section 23 and the light reflecting section 21 may be prevented from falling into the back surface of the second cell, and the risk of the cell 1 cracking may be effectively reduced.

In a further embodiment of the present invention, with reference to fig. 2 and 3, each interconnecting structure 2 further includes a second connecting section 24 and a second transition section 25, the second connecting section 24 is flat, the second connecting section 24 is located at an end of the light reflecting section 21 away from the first connecting section 22, the second transition section 25 is connected between the second connecting section 24 and the light reflecting section 21, the second connecting section 24 and the second transition section 25 are both located on the front surface of the first battery piece, and the minimum distance between the free end of the second connecting section 24 of at least two of the plurality of interconnecting structures 2 and the corresponding edge of the first battery piece is different.

For example, in the example of fig. 2 and 3, the first end distance of the interconnecting structural member 2 is the minimum distance between the free end of the second connecting section 24 and the first edge. Therefore, by providing the second connecting section 24, the contact area between the interconnecting structural member 2 and the first battery piece can be further increased, and the connection between the interconnecting structural member 2 and the first battery piece is firmer. Moreover, when the interconnecting structural member 2 is offset in the direction from the light reflecting section 21 toward the second connecting section 24, the second connecting section 24 may extend to the back surface of the adjacent battery plate 1, so that the second transition section 25 and the light reflecting section 21 may be prevented from falling into the back surface of the adjacent battery plate 1, and the risk of the battery plate 1 cracking may be further reduced. Moreover, by arranging the second transition section 25, the transition between the light reflecting section 21 and the second connecting section 24 can be realized, the fracture of the joint of the light reflecting section 21 and the second connecting section 24 is avoided, the whole interconnected structural member 2 has higher structural strength, and the reliability of the photovoltaic module can be further improved.

In some embodiments of the present invention, as shown in fig. 1, 2 and 4, a plurality of bonding pads 3 are disposed between each interconnection structure 2 and the battery plate 1, the first bonding pad 31 is located closest to the edge of the first battery plate in the plurality of bonding pads 3, and at least one end of the light reflection section 21 extends to exceed the corresponding first bonding pad 31.

For example, in the examples of fig. 1, 2 and 4, both ends of the light reflecting section 21 may extend beyond the first pad 31. Therefore, by arranging the plurality of pads 3, since the interconnection structure 2 generally includes the solder layer, when the interconnection structure 2 is connected with the cell 1, for example, during soldering, the plurality of pads 3 can effectively collect tin in the liquid solder layer, so that the soldering tension between the interconnection structure 2 and the cell 1 can be improved, the connection between the interconnection structure 2 and the cell 1 can be firmer, and the reliability of the photovoltaic module can be improved. Moreover, by extending at least one end of the light reflecting section 21 beyond the first pad 31, the contact area between the interconnection structure 2 and the first pad 31 can be increased, so that the connection firmness between the interconnection structure 2 and the cell 11 can be further improved, and the current collection efficiency of the photovoltaic module can be improved.

Alternatively, referring to fig. 1, the area of the first land 31 may be larger than that of the rest of the lands 3, so that the first land 31 may better gather tin in the liquid solder layer, so that the portion of the interconnection structure 2 adjacent to the edge of the cell 1 may be more firmly fixed on the cell 1, and the firm connection between the interconnection structure 2 and the cell 1 is ensured.

Other constructions and operations of photovoltaic modules according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present invention, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.

In the description of the invention, the first feature being "on", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A photovoltaic module, comprising:

a battery piece;

a plurality of interconnection structures, a plurality of the interconnection structures are all connected on one side surface of the battery piece, and the minimum distance between the end of at least two of the plurality of the interconnection structures and the corresponding edge of the battery piece is unequal.

2. The photovoltaic assembly of claim 1, wherein a minimum distance between an end of each of the interconnecting structural members and a respective edge of the cell sheet is d₁Wherein d is₁Satisfies the following conditions: d is not less than 0mm₁≤4mm。

3. The photovoltaic module according to claim 1 or 2, wherein the plurality of the cell pieces are provided, adjacent two of the plurality of the cell pieces are respectively a first cell piece and a second cell piece, one end of each of the interconnection structures is connected to the front surface of the first cell piece, the other end of each of the interconnection structures is connected to the back surface of the second cell piece,

the minimum distance between the one end of at least two of the plurality of the interconnection structures and one side edge of the first battery piece far away from the second battery piece is unequal; and/or

The minimum distance between the other end of at least two of the plurality of the interconnection structures and one side edge of the second battery piece far away from the first battery piece is unequal.

4. The photovoltaic module of claim 3, wherein each of the interconnecting structures comprises a light reflecting section, a first connecting section and a first transition section, the first connecting section is flat in shape, the light reflecting section is non-flat in shape, the first transition section is connected between the light reflecting section and the first connecting section, the light reflecting section is connected to the front surface of the first cell piece, and at least a portion of the first connecting section is connected to the back surface of the second cell piece.

5. The photovoltaic module of claim 4, wherein the first transition section is located on the front side of the first cell sheet, and the minimum distance between the end of the first transition section of at least two of the plurality of interconnecting members connected to the first connecting section and the corresponding edge of the first cell sheet is unequal.

6. The photovoltaic assembly of claim 5, wherein the minimum distance between the end of the first transition section of each of the interconnecting structural members connected to the first connecting section and the corresponding edge of the first cell sheet is d₂Wherein d is₂Satisfies the following conditions: d is not less than 0mm₂≤8mm。

7. The photovoltaic assembly of claim 4, wherein a portion of the first connecting segment of at least one of the interconnecting structural members is located on a front side of the first cell sheet.

8. The photovoltaic assembly of claim 4, wherein each of the interconnecting structures further comprises a second connecting section and a second transition section, the second connecting section is flat in shape, the second connecting section is located at an end of the light reflecting section away from the first connecting section, the second transition section is connected between the second connecting section and the light reflecting section, the second connecting section and the second transition section are both located on the front side of the first cell sheet, and the minimum distances between the free ends of the second connecting sections of at least two of the plurality of interconnecting structures and the corresponding edges of the first cell sheet are unequal.

9. The assembly defined in claim 4 wherein a plurality of solder pads are provided between each of said interconnect structures and said cell sheet, the first of said plurality of solder pads closest to the edge of said first cell sheet being a first solder pad,

at least one end of the light reflecting section extends to exceed the corresponding first bonding pad.

10. The photovoltaic module according to claim 1 or 2, wherein the number of the interconnection structures on the one side surface of the cell sheet is N, wherein N satisfies: n is more than or equal to 5 and less than or equal to 9.