CN210136884U - Photovoltaic module - Google Patents

Abstract

The application provides a photovoltaic module, which comprises a plurality of cell strings arranged at intervals along a first direction, wherein each cell string is provided with at least one interconnected cell sheet; the photovoltaic module further comprises an electric connecting piece used for connecting two interconnected battery pieces corresponding to the positions in the adjacent battery strings, and two ends of the electric connecting piece are respectively connected to the edge positions of one opposite side of the two interconnected battery pieces. This application is through connecting the connection of corresponding interconnected cell piece in different battery strings is realized to the electric connector of the border position of interconnected cell piece, reduces interconnected cell piece surface shading area improves conversion efficiency, still makes this photovoltaic module's outward appearance improve.

Description

Photovoltaic modules

technical field

The present application relates to the technical field of solar energy manufacturing, and in particular, to a photovoltaic module.

Background technique

In recent years, the market demand for high-power modules has continued to grow. Shingled modules do not need to be equipped with welding strips. By eliminating the chip spacing between adjacent cells, the battery capacity per unit area is increased, and the module efficiency is effectively improved. Therefore, it has attracted wide attention in the industry. As shown in FIG. 1 , the above-mentioned shingled assembly usually adopts strip-shaped battery sheets 201 to overlap and connect in series to obtain corresponding battery strings 202 . The battery strings 202 can be divided into three sub-strings in the longitudinal direction, and different battery strings 202 pass through the bus bars. 203 , 204 are connected to each other, and the substrings are connected in parallel across the corresponding diodes through bus bars 203 , 204 , 205 .

For a double-sided module, the above-mentioned bus bars reduce the light-receiving area on the back of the module and reduce the conversion efficiency of the back surface; and the bus bars also cause a large difference in the appearance of the front and back of the module, which affects the appearance. In view of this, it is necessary to provide a new bifacial photovoltaic module.

Utility model content

The purpose of the present application is to provide a photovoltaic module, which can reduce the shading area of the surface, improve the conversion efficiency, and improve the appearance of the module.

In order to achieve the above purpose, an embodiment of the present application provides a photovoltaic module, comprising a plurality of battery strings arranged at intervals along a first direction, the battery string having at least one interconnected battery sheet; An electrical connection piece of two interconnected battery sheets in a battery string, two ends of the electrical connection piece are respectively connected at the edge positions of the opposite sides of the two interconnected battery pieces.

As a further improvement of the embodiment of the present application, an interconnection electrode is further provided on the edge of the two interconnected battery sheets on the opposite side, and the electrical connector is connected to the interconnection electrode.

As a further improvement of the embodiments of the present application, the interconnected electrodes are disposed on the backside of the interconnected battery sheets, and the interconnected electrodes do not exceed the coverage area of the electrical connectors.

As a further improvement of the embodiments of the present application, the photovoltaic module further includes a first bus bar and a second bus bar connected to both ends of the battery string, and an intermediate bus bar connected to the interconnected battery sheets.

As a further improvement of the embodiment of the present application, the intermediate bus bar is extended along a second direction perpendicular to the first direction.

As a further improvement of the embodiments of the present application, the photovoltaic assembly includes two battery groups arranged symmetrically with each other along the first direction, each battery group includes 3 of the battery strings; the two battery groups are arranged along the first direction The distance between the two adjacent battery strings in the battery pack along the first direction is greater than the distance between the two battery packs, and the middle bus bar is arranged between the two battery packs.

As a further improvement of the embodiments of the present application, each of the battery strings includes two interconnected battery slices.

As a further improvement of the embodiment of the present application, the intermediate bus bar includes a third bus bar and a fourth bus bar, and the third bus bar and the fourth bus bar are respectively connected to two different interconnected batteries on the battery string piece.

As a further improvement of the embodiment of the present application, the battery string includes three evenly divided sub-strings, and the interconnected battery sheets are located at the end of the sub-string facing another adjacent sub-string.

As a further improvement of the embodiment of the present application, the battery string includes a plurality of battery sheets arranged in sequence along a second direction perpendicular to the first direction, and the overlapping regions of the adjacent battery sheets are arranged along the second direction. The width is set to 0.5 to 1.5 mm.

The beneficial effects of the present application are: using the photovoltaic modules of the present application, the electrical connection of the corresponding interconnected cells in different battery strings is realized through the electrical connectors connected at the edge positions of the interconnected cells, and the surface of the interconnected cells is reduced. The shading area improves the conversion efficiency; and the appearance of the two sides of the photovoltaic module is more consistent, and the aesthetics of the module is improved.

Description of drawings

FIG. 1 is a schematic diagram of the rear structure of an existing photovoltaic module;

FIG. 2 is a schematic view of the rear structure of a photovoltaic module according to a preferred embodiment of the present application;

Fig. 3 is the enlarged structure schematic diagram of A area in Fig. 2;

FIG. 4 is a schematic view of the rear structure of another preferred embodiment of the photovoltaic module of the present application;

FIG. 5 is an enlarged schematic structural diagram of the B region in FIG. 4 .

Detailed ways

The present application will be described in detail below with reference to the embodiments shown in the accompanying drawings. However, this embodiment does not limit the present application, and the structural, method, or functional transformations made by those of ordinary skill in the art according to this embodiment are all included in the protection scope of the present application.

Referring to FIGS. 2 and 3 , the photovoltaic module 100 provided by the present application includes a plurality of battery strings 10 arranged at intervals along a first direction, a first bus bar 21 and a second bus bar respectively connected and disposed at both ends of the battery string 10 . Article 22.

The battery string 10 includes a plurality of battery sheets 11 that are overlapped and connected in series along a second direction perpendicular to the first direction, and at least one interconnected battery sheet 110 is included in the plurality of battery sheets 11 . The battery sheet 11 is set as a bar-shaped battery sheet, and the bar-shaped battery sheet is usually obtained by dividing a single crystal or polycrystalline battery sheet in a whole piece, and the overlapping area of the adjacent battery sheets 11 is along the first The width in both directions is usually set to 0.5 to 1.5 mm. The arrangement of the interconnected cells 110 can be understood as dividing the battery string 10 into several sub-strings, and then connecting each sub-string in the battery string 10 to different diodes in parallel, so as to better avoid the occurrence of the photovoltaic module 100 Hot spots or other operating anomalies. Here, the battery string 10 is evenly divided into three substrings. In other words, the battery string 10 has two interconnected battery slices 110 , and the interconnected battery slices 110 are located in the substring toward another adjacent substring. end position.

The interconnected battery slices 110 in one of the battery strings 10 correspond to the interconnected battery slices 110 in the other adjacent battery string 10 along the first direction, and the positions of the two interconnected battery slices 110 correspond to each other. The edge positions on the opposite side are provided with interconnecting electrodes (not shown). The photovoltaic module 100 further includes an electrical connector 30 for connecting the two interconnected battery sheets 110 in the adjacent battery strings 10 at corresponding positions, and two ends of the electrical connector 30 are respectively connected to the two interconnected batteries. on the interconnecting electrodes on the opposite side of the sheet 110 . Wherein, the interconnecting electrodes are located on the backside of the interconnecting cell 110 and are disposed adjacent to its short edge.

Generally, the interconnecting electrodes can be configured as silver electrodes and are connected with electrode grid lines on the back surface of the interconnecting cell 110 . The electrical connector 30 can be configured as a conductive tape or a flexible metal sheet, and the length of the electrical connector 30 along the first direction is adapted to the distance between the interconnecting electrodes on the opposite side of the adjacent two interconnected battery sheets 110 , preferably , the interconnection electrode does not exceed the coverage area of the electrical connector 30 . That is to say, the electrical connector 30 is only connected to the short edge of the interconnected cell 110 , which greatly reduces the influence on the light receiving area of the back of the interconnected cell 110 , which is beneficial to the improvement of the conversion efficiency of the back of the interconnected cell 110 . , and make the back surface of the corresponding photovoltaic module 100 more neat and beautiful.

The photovoltaic assembly 100 further includes an intermediate bus bar connected to the interconnected cell sheets 110, the intermediate bus bar extending along the second direction. In this embodiment, the photovoltaic assembly 100 includes two battery groups arranged symmetrically with each other along the first direction, and each battery group includes three of the battery strings 10 . Wherein, the distance between the two battery packs along the first direction is greater than the distance between the two adjacent battery strings 10 in the battery pack along the first direction, and the middle bus bar is arranged between the two battery packs, The influence of the intermediate bus bars on the light receiving area of the back surface of the corresponding cell 11 is effectively avoided, the conversion efficiency of the back surface is improved, and the appearance consistency of the front and back surfaces of the photovoltaic module 100 can also be improved.

The middle bus bar includes a third bus bar 23 and a fourth bus bar 24 , and the third bus bar 23 and the fourth bus bar 24 are respectively connected to two different interconnected battery sheets 110 on the battery string 10 . The photovoltaic module 100 also has an insulating gasket 40 , and the insulating gasket 40 is specifically arranged at the electrical connector 30 connected to the third bus bar 23 to prevent the electrical connector 30 from being in phase with the fourth bus bar 24 . on.

Here, the photovoltaic assembly 100 further includes a first junction box 51 and a second junction box 52 that are disposed separately and located at the edges of both sides of the photovoltaic assembly 100 along the second direction. The first junction box 51 has two diodes, the first bus bar 21 and the third bus bar 23 are connected to two ends of one of the diodes, and the third bus bar 23 and the fourth bus bar 24 are connected to each other. At both ends of the other diode; the second junction box 52 has a diode, and the fourth bus bar 24 and the second bus bar 22 are connected at both ends of the diode.

The present application also provides another embodiment, as shown in FIG. 4 and FIG. 5 , which is different from the previous embodiment in that the photovoltaic module 100 includes an integrally arranged junction box 53 . There are three diodes. Here, the photovoltaic assembly 100 further includes a fifth bus bar 25 connected to the second bus bar 22 , the fifth bus bar 25 is also disposed between the two battery packs and extends along the second direction. Insulation spacers 40 are also provided at the positions of the electrical connectors 30 to which the third bus bar 23 and the fourth bus bar 24 are connected correspondingly, so that the corresponding electrical connectors 30 are not connected to other bus bars. Obviously, the junction box 53 can also be arranged at an edge position on one side of the second bus bar 22 .

To sum up, the photovoltaic module 100 realizes the connection of the interconnected cells 110 in different battery strings 10 through the cooperation of the electrical connectors 30 and the interconnected electrodes, thereby reducing the shading area on the surface of the interconnected cells 110 and improving the conversion efficiency. In addition, the photovoltaic assembly 100 also arranges the middle bus bar between the two battery packs, so that the appearance of the two sides of the photovoltaic assembly 100 is more consistent and the aesthetics is improved.

It should be understood that although this specification is described in terms of embodiments, not every embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole, and each The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions for the feasible embodiments of the present application, and they are not intended to limit the protection scope of the present application. Changes should be included within the scope of protection of this application.

Claims (10)

1. The utility model provides a photovoltaic module, includes a plurality of battery strings of arranging along first direction interval which characterized in that: the battery string is provided with at least one interconnected battery piece; the photovoltaic module further comprises an electric connecting piece used for connecting two interconnected battery pieces in the adjacent battery strings, and two ends of the electric connecting piece are respectively connected to the edge positions of one opposite side of the two interconnected battery pieces.

2. The photovoltaic module of claim 1, wherein: and the edge positions of the opposite sides of the two interconnected battery pieces are also provided with interconnected electrodes, and the electric connecting piece is connected to the interconnected electrodes.

3. The photovoltaic module of claim 2, wherein: the interconnection electrode is arranged on the back surface of the interconnection battery piece, and the interconnection electrode does not exceed the coverage area of the electric connecting piece.

4. The photovoltaic module of claim 1, wherein: the photovoltaic module further comprises a first bus bar and a second bus bar which are connected to two ends of the cell string, and a middle bus bar which is connected with the interconnected cell pieces.

5. The photovoltaic module of claim 4, wherein: the intermediate bus bar extends in a second direction perpendicular to the first direction.

6. The photovoltaic module of claim 4, wherein: the photovoltaic module comprises two battery packs which are symmetrically arranged along a first direction, and each battery pack comprises 3 battery strings; the distance between the two battery packs in the first direction is larger than the distance between the two adjacent battery strings in the battery packs in the first direction, and the intermediate bus bar is arranged between the two battery packs.

7. The photovoltaic module of claim 4, wherein: each of the battery strings includes two interconnected battery pieces.

8. The photovoltaic module of claim 7, wherein: the middle bus bar comprises a third bus bar and a fourth bus bar, and the third bus bar and the fourth bus bar are respectively connected with two different interconnected battery pieces on the battery string.

9. The photovoltaic module of claim 7, wherein: the battery string comprises three sub strings which are uniformly divided, and the interconnected battery pieces are positioned at the tail end positions of the sub strings facing to another adjacent sub string.

10. The photovoltaic module of claim 1, wherein: the battery string includes along a plurality of battery pieces of perpendicular to first direction's second direction overlap setting in proper order, and is adjacent the overlap region of battery piece is followed the width of second direction sets up to 0.5 ~ 1.5 mm.

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