CN216054737U - Photovoltaic module and solar cell - Google Patents

Abstract

The utility model relates to the field of photovoltaic module manufacturing, and discloses a photovoltaic module and a solar cell, wherein the photovoltaic module comprises: a plurality of battery pieces (100) which are sequentially laid at intervals to be linearly arranged, and any two adjacent battery pieces (100) are laid in opposite directions; and a solder strip (200) comprising a first solder strip (210) arranged extending in a first plane (M) and a second solder strip (220) arranged extending in a second plane (N), the first plane (M) being arranged in parallel spaced apart relation to the second plane (N). A plurality of battery pieces adopt two parallel welding strips to connect into a string, reduce the battery piece and receive stress influence and the fragment phenomenon that produces, and the mode of arranging of welding strip is simple, need not to look for the welding position that the mark welded the strip, has improved welding efficiency.

Description

Photovoltaic module and solar cell

Technical Field

The utility model belongs to the technical field of photovoltaic module manufacturing, and particularly relates to a photovoltaic module and a solar cell.

Background

Solar energy is increasingly used as the cleanest, safe and reliable energy source, and the best way to utilize solar energy is photovoltaic conversion, i.e. the photovoltaic effect is utilized to make sunlight irradiate silicon materials to generate current for direct power generation. Since the current and voltage of a single solar cell are small, a plurality of solar cells are required to be connected in series to form a photovoltaic module to obtain a high voltage.

The existing photovoltaic module usually adopts an infrared welding mode to connect a plurality of solar cells together, and single cells are connected in series into a string in a front-back side mode of the cells. The process not only needs to carry out special treatment on the welding strip connection position, but also is more complicated when the distance is adjusted and the sheet source is switched, and the welding strip connection position is bent and is not adjusted in place, so that the cell sheet is fractured.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides the photovoltaic module and the solar cell, the damage rate of the cell piece is low, the arrangement mode of the solder strip is simple, and the welding efficiency is improved.

To achieve the above object, the present invention provides a photovoltaic module, comprising:

the plurality of battery pieces are sequentially laid at intervals to be linearly arranged, and any two adjacent battery pieces are laid in opposite directions; and

the welding strip comprises a first welding strip extending in a first plane and a second welding strip extending in a second plane, and the first plane and the second plane are arranged in parallel at a spacing;

the two polar surfaces of the cell are respectively located in the first plane and the second plane, the first welding strips are sequentially connected with the plurality of polar surfaces located in the first plane between the plurality of linearly arranged cell, and the second welding strips are sequentially connected with the plurality of polar surfaces located in the second plane.

In some embodiments, the plurality of the battery cells are arranged in rows in a first direction and in columns in a second direction, and the first direction crosses the second direction.

In some embodiments, the first direction is perpendicular to the second direction.

In some embodiments, the first solder strip and the second solder strip are each in a serpentine arrangement and include:

the plurality of first-direction welding strip sections are parallel to each other and are arranged at intervals along the second direction; and

the second direction welding band sections are arranged between two adjacent first direction welding band sections;

and the first direction welding strip section and the second direction welding strip section are sequentially connected in an end-to-end manner.

In some embodiments, the battery cell is a double-sided battery and includes a positive polarity face and a negative polarity face as the polarity faces, which are oppositely disposed.

In some embodiments, the positive polarity plane of the cell piece is disposed coplanar with the negative polarity plane of the adjacent cell piece in the first direction and the second direction.

In some embodiments, the photovoltaic module further includes an electrode lead-out wire, the cell piece where the end of the solder strip is located is an end position cell piece, and the electrode lead-out wire extends out of the end position cell piece and is connected with the solder strip.

In some embodiments, the electrode lead wires include first lead wires and second lead wires arranged at intervals, the end-position cell pieces include a head-end cell piece and a tail-end cell piece, the first lead wires are connected to the first solder ribbon and extend from the head-end cell piece, and the second lead wires are connected to the second solder ribbon and extend from the tail-end cell piece.

A solar cell comprises the photovoltaic module.

In some embodiments, the number of the cells of the photovoltaic module is an even number.

According to the technical scheme, the photovoltaic module is characterized in that a plurality of battery pieces are connected into a string by adopting two parallel welding strips, so that the phenomenon of piece breakage caused by stress influence of the battery pieces is reduced, the arrangement mode of the welding strips is simple, the welding positions of the welding strips do not need to be searched and marked, and the welding efficiency is improved.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic structural diagram of a photovoltaic module provided in accordance with an embodiment of the present invention;

fig. 2 is a partial structural view of fig. 1 at different viewing angles, showing the positive and negative polarity faces of the battery cell, the first solder strips, and the second solder strips.

Description of reference numerals:

100 cell piece 200 welding strip

300 electrode lead-out wire

110 positive polarity surface 120 negative polarity surface

210 first solder strip 220 second solder strip

1 first direction solder strip section 2 second direction solder strip section

3 first lead-out wire 4 second lead-out wire

5 head end position battery piece and 6 tail end position battery piece

X first direction Y second direction

M first plane N second plane

Detailed Description

The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The utility model firstly discloses a photovoltaic module and a solar cell, wherein a plurality of cells need to be connected in series to form a string in the production process of the photovoltaic module. The specific structure and function of the photovoltaic module and the solar cell will be described in detail below.

The utility model firstly provides a photovoltaic module, comprising: a plurality of battery pieces 100 and solder strips 200;

specifically, a plurality of battery pieces 100 are sequentially laid at intervals to be linearly arranged, and any two adjacent battery pieces 100 are laid in opposite directions; and

the solder strip 200 comprises a first solder strip 210 extending in a first plane M and a second solder strip 220 extending in a second plane N, wherein the first plane M and the second plane N are arranged in parallel at intervals;

the two polar surfaces of the battery piece 100 are respectively located on the first plane M and the second plane N, and between the plurality of battery pieces 100 arranged linearly, the first solder strip 210 sequentially connects the plurality of polar surfaces located on the first plane M, and the second solder strip 220 sequentially connects the plurality of polar surfaces located on the second plane N.

The utility model aims to solve the problems of welding efficiency and cell breakage rate of a photovoltaic module. The existing photovoltaic module usually adopts an infrared welding mode to connect a plurality of solar cells together, and single cells are connected in series into a string in a front-back side mode of the cells. The process not only needs to carry out special treatment on the welding strip connection position, but also is more complicated when the distance is adjusted and the sheet source is switched, and the welding strip connection position is bent and is not adjusted in place, so that the cell sheet is fractured. Therefore, how to improve the welding efficiency of the battery piece and reduce the breakage rate of the battery piece is a concern.

This photovoltaic module has a plurality of battery pieces 100, and battery piece 100 can place and process on operation platform, and wherein, battery piece 100 is sheet structure and is linear and arrange, can arrange along the straight line if battery piece 100, also can arrange along the pitch arc, can also be many row's structure for single structure. Taking a plurality of rows of battery pieces 100 as an example, as shown in fig. 1, any two adjacent battery pieces 100 are laid in opposite directions, it can be understood that the battery pieces 100 may include front and back surfaces which are oppositely arranged, in the same row, the back surface of a certain battery piece 100 is attached to the operating platform, and the front surface of the battery piece 100 adjacent to the battery piece 100 is attached to the operating platform; among the rows, the back surface of the battery piece 100 in a certain row is attached to the operating platform, and the front surface of the battery piece 100 at the corresponding position of the adjacent row is attached to the operating platform.

Further, most of the conventional welding methods for the battery cell 100 are multi-segment welding strips, that is, the welding strips need to be inserted between the first plane M and the second plane N, and the welding efficiency is low, so in the present invention, the arrangement method of the welding strips 200 is designed. The solder strip 200 may be two sets of solder strips, one of which is a first solder strip 210 and the other of which is a second solder strip 220, and the first solder strip 210 and the second solder strip 220 are respectively disposed in a first plane M and a second plane N which are parallel to each other, as shown in fig. 2. Wherein, in the first plane M, the first welding strip 210 is connected to one polar surface of the plurality of battery pieces 100, and in the second plane N, the second welding strip 220 is connected to the other polar surface of the plurality of battery pieces 100. In this way, the plurality of battery cells 100 are connected in series to form a string by the first and second welding tapes 210 and 220 connected to both polar surfaces of the battery cells 100. The problem of welding mode in welding process is reduced and the battery piece receives stress and leads to the fragment, and if the fragment that the welding caused will be found in EL test department, increase the stromatolite and reprocess the rate, cause very big influence to producing line product quality and output. Therefore, the two parallel welding strips 200 are used, the breakage rate of the battery piece in the welding process is reduced, the welding position of the marked welding strips does not need to be searched, and the welding efficiency is improved. In addition, the welding strips 200 may be welded by infrared welding, and each group of welding strips may be composed of 5, 9 or 10 welding strips, which is not limited herein.

As to the specific arrangement of the battery pieces 100, in some embodiments, the plurality of battery pieces 100 are arranged in rows along a first direction X and in columns along a second direction Y, and the first direction X intersects with the second direction Y. It is understood that a plurality of battery plates 100 may form a battery plate group, the battery plate group is composed of a plurality of rows, and an included angle of 30 °, 60 ° or 90 ° may be formed between the first direction X and the second direction Y, and specifically, the included angle may be adjusted according to actual needs.

Further, in one embodiment, the first direction X is perpendicular to the second direction Y, as shown in fig. 1. At the moment, the included angle between the first direction X and the second direction Y is 90 degrees, namely the cell piece group is rectangular, the structure is regular, the arrangement of the cell pieces 100 is convenient, and the processing time is shortened.

In one aspect, for the specific configuration of the solder strip 200, in one embodiment, the first solder strip 210 and the second solder strip 220 are each arranged in a serpentine shape and include a plurality of first direction solder strip segments 1, parallel to each other and spaced apart along the second direction Y; and a plurality of second direction solder strip sections 2 arranged between two adjacent first direction solder strip sections 1. Wherein, the first direction solder strip section 1 and the second direction solder strip section 2 are sequentially connected end to end, as shown in fig. 1. It can be understood that the first direction solder strip segments 1 extend in the first direction X, the second direction solder strip segments 2 extend in the second direction Y, and in the second direction Y, the first direction solder strip segments 1 and the second direction solder strip segments 2 are sequentially and alternately arranged, and one end of each first direction solder strip segment 1 is connected with one end of the adjacent second direction solder strip segment 2. Like this, can form a snakelike solder strip 200 through first direction solder strip section 1 and second direction solder strip section 2, namely, in the coplanar, only need one solder strip 200 to draw weld can, need not the multistage solder strip, further improve welding efficiency. In addition, each of the first direction solder strip sections 1 and the second direction solder strip sections 2 may be arranged in a straight line or an arc line.

On the other hand, with respect to the battery sheet 100, in one embodiment, the battery sheet 100 is a double-sided battery and includes a positive polarity face 110 and a negative polarity face 120 as polarity faces that are oppositely disposed. It is understood that the double-sided cell sheet may have a sheet structure, in which the areas of the two wall surfaces as the polar surfaces are larger, so as to absorb more light energy of solar radiation. In addition, the size and thickness of the battery sheet 100 may be various and are not particularly limited.

Further, in one embodiment, the positive polarity face 110 of a cell 100 is disposed coplanar with the negative polarity face 120 of an adjacent cell 100 in the first direction X and the second direction Y, as shown in fig. 2. It can be understood that the oppositely disposed group surfaces of the cell group are respectively in the first plane M and the second plane N, and each group surface is composed of a plurality of positive polarity surfaces 110 and negative polarity surfaces 120 which are alternately disposed, wherein the positive polarity surfaces 110 and the negative polarity surfaces 120 are alternately disposed along a serpentine shape, which is the same as the arrangement manner of the welding strip 200, so that the positive polarity surfaces 110 of the cell plates 100 can be connected with the negative polarity surfaces 120 of the connected cell plates through the welding strip 200, thereby ensuring that the plurality of cell plates 100 are serially connected in a string.

In addition, the photovoltaic module further comprises an electrode lead-out wire 300, the cell piece 100 where the end part of the solder strip 200 is located is an end position cell piece, and the electrode lead-out wire 300 extends out of the end position cell piece and is connected with the solder strip 200, as shown in fig. 1. It is understood that the electrode lead lines 300 may output the power of the cell stack. Specifically, in one embodiment, the electrode lead lines 300 include first lead lines 3 and second lead lines 4 arranged at intervals, the end-position cell pieces include a leading end-position cell piece 5 and a trailing end-position cell piece 6, the first lead lines 3 are connected to the first solder ribbon 210 and extend from the leading end-position cell piece 5, and the second lead lines 4 are connected to the second solder ribbon 220 and extend from the trailing end-position cell piece 6, as shown in fig. 1. It can be understood that the cell 100 where the two ends of the solder ribbon 200 are located is an end position cell, the first outgoing line 3 extends from the negative polarity surface 120 of the head end position cell 5 to output a positive electrode, and the second outgoing line 4 extends from the negative polarity surface 120 of the tail end position cell 6 to output a negative electrode, so that when sunlight irradiates the cell 100, the cell 100 converts light energy into electric energy and outputs the electric energy through the electrode outgoing line 300.

In addition, the utility model also provides a solar cell which comprises the photovoltaic module.

Further, in an embodiment, the number of the cells 100 of the photovoltaic module is an even number, for example, each row includes 10 cells 100 arranged in sequence in the first direction X, and each column includes 6 cells arranged in sequence in the second direction Y.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical spirit of the present invention.

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", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships that are recognizable based on the drawings, and are used merely for convenience of description and for simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A photovoltaic module, comprising:

a plurality of battery pieces (100) which are sequentially laid at intervals to be linearly arranged, and any two adjacent battery pieces (100) are laid in opposite directions; and

a solder strip (200) comprising a first solder strip (210) arranged extending in a first plane (M) and a second solder strip (220) arranged extending in a second plane (N), the first plane (M) being arranged parallel to and spaced apart from the second plane (N);

two polar surfaces of the cell (100) are respectively located in the first plane (M) and the second plane (N), and are linearly arranged between the cell (100), the first welding strip (210) is sequentially connected with a plurality of polar surfaces located in the first plane (M), and the second welding strip (220) is sequentially connected with a plurality of polar surfaces located in the second plane (N).

2. The photovoltaic module according to claim 1, wherein a plurality of the cells (100) are arranged in rows along a first direction (X) and in columns along a second direction (Y), the first direction (X) intersecting the second direction (Y).

3. Photovoltaic module according to claim 2, characterized in that said first direction (X) is perpendicular to said second direction (Y).

4. The photovoltaic module according to claim 2, characterized in that the first solder strip (210) and the second solder strip (220) are each arranged in a serpentine shape and comprise:

a plurality of first direction solder strip sections (1) parallel to each other and arranged at intervals along the second direction (Y); and

the second-direction welding strip sections (2) are arranged between two adjacent first-direction welding strip sections (1);

the first direction welding strip section (1) and the second direction welding strip section (2) are sequentially connected in an end-to-end mode.

5. The photovoltaic module according to claim 2, wherein the cell sheet (100) is a bifacial cell and includes a positive polarity face (110) and a negative polarity face (120) as the polarity faces, which are oppositely disposed.

6. The photovoltaic module according to claim 5, characterized in that in the first direction (X) and in the second direction (Y) the positive faces (110) of the cells (100) are disposed coplanar with the negative faces (120) of the adjacent cells (100).

7. The photovoltaic module according to any one of claims 1 to 6, further comprising an electrode lead (300), wherein the cell (100) on which the end of the solder ribbon (200) is located is an end cell, and the electrode lead (300) extends from the end cell and is connected with the solder ribbon (200).

8. The photovoltaic module according to claim 7, wherein the electrode lead wires (300) comprise a first lead wire (3) and a second lead wire (4) which are arranged at intervals, the end cell piece comprises a head end cell piece (5) and a tail end cell piece (6), the first lead wire (3) is connected with the first solder strip (210) and extends out of the head end cell piece (5), and the second lead wire (4) is connected with the second solder strip (220) and extends out of the tail end cell piece (6).

9. A solar cell, characterized in that it comprises a photovoltaic module according to any one of claims 1 to 8.

10. Solar cell according to claim 9, characterized in that the number of the cells (100) of the photovoltaic module is an even number.

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