CN209785958U

CN209785958U - Photovoltaic module

Info

Publication number: CN209785958U
Application number: CN201920361800.4U
Authority: CN
Inventors: 许庆丰; 徐琛; 王乐; 何秉轩
Original assignee: Longi Green Energy Technology Co Ltd
Current assignee: Longi Green Energy Technology Co Ltd
Priority date: 2019-03-20
Filing date: 2019-03-20
Publication date: 2019-12-13
Anticipated expiration: 2029-03-20

Abstract

The application provides a photovoltaic module, relates to solar energy technical field. The photovoltaic module comprises at least one battery unit, wherein the battery unit is rectangular; the battery unit comprises a plurality of electrically connected battery string groups, each battery string group comprises a plurality of parallel battery strings, and each battery string comprises a plurality of battery sheets connected in series; the battery string group is provided with two conductive ends and two side edges positioned between the two conductive ends; at least two adjacent battery string groups are arranged according to a preset mode, and the preset mode is as follows: a conductive end of one battery string group and one side edge of an adjacent battery string group are positioned on a straight line, and the two adjacent battery string groups are positioned on the same side of the straight line.

Description

Photovoltaic module

Technical Field

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

Background

The photovoltaic module is a device for converting light energy into electric energy by using a photovoltaic effect. Among them, in a solar cell, it is usually necessary to connect a plurality of cells in series to form a cell string, and the plurality of cell strings may be connected in series or in parallel to form a cell string set. In the working process, if the cell is shielded, the shielded cell becomes a load, the power generated by other cells is consumed and heat is generated, the local temperature of the assembly is increased, a hot spot effect is generated, and the output power of the solar cell is reduced or even burnt. In order to reduce the influence of hot spots, a diode is usually required to be introduced into a solar cell and connected in parallel with a cell string in an inverse direction, when a cell sheet connected with the diode in parallel is shielded, the diode is conducted to enable the shielded cell to be bypassed, and the hot spot effect is avoided.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present application and therefore may include information that does not constitute prior art known to a person of ordinary skill in the art.

SUMMERY OF THE UTILITY MODEL

an object of this application is to provide a photovoltaic module, can reduce the busbar use amount, and is convenient for walk the line.

According to one aspect of the present application, there is provided a photovoltaic module comprising at least one cell, the cell being rectangular; the battery unit comprises a plurality of electrically connected battery string groups, each battery string group comprises a plurality of parallel-connected battery strings, and each battery string comprises a plurality of battery sheets connected in series; the battery string group is provided with two conductive ends and two side edges positioned between the two conductive ends; at least two adjacent battery string groups are arranged according to a preset mode, wherein the preset mode is as follows:

One conductive end of one battery string group and one side edge of an adjacent battery string group are positioned on a straight line, and the two adjacent battery string groups are positioned on the same side of the straight line.

In an exemplary embodiment of the present application, the battery unit includes a first battery string group, a second battery string group, and a third battery string group; the second battery string group and the third battery string group are both adjacent to the first battery string group;

A conductive end of the first battery string group and one side edge of the second battery string group are positioned on a first straight line, and the first battery string group and the second battery string group are positioned on one side of the first straight line;

And one conductive end of the third battery string group and one side edge of the first battery string group are positioned on a second straight line, and the third battery string group and the first battery string group are positioned on one side of the second straight line.

In an exemplary embodiment of the present application, the battery unit further includes a fourth battery string group, the second battery string group and the third battery string group are both located adjacent to the fourth battery string group, and the third battery string group is electrically connected to the fourth battery string group;

One side edge of the third battery string group and one conductive end of the fourth battery string group are positioned on a third straight line, and the third battery string group and the fourth battery string group are positioned on one side of the third straight line;

And one conductive end of the second battery string group and one side edge of the fourth battery string group are positioned on a fourth straight line, and the second battery string group and the fourth battery string group are positioned on one side of the fourth straight line.

In an exemplary embodiment of the present application, the first, second, third, and fourth battery string groups have the same shape.

In an exemplary embodiment of the present application, the battery cells do not have a blank area surrounded by the battery string.

In an exemplary embodiment of the present application, the battery unit includes a first battery string group, a second battery string group, and a third battery string group; the second battery string group and the third battery string group are both adjacent to the first battery string group; a conductive end of the first battery string group and one side edge of the second battery string group are positioned on a first straight line, and the first battery string group and the second battery string group are positioned on one side of the first straight line; and one conductive end of the third battery string group and one side edge of the first battery string group are positioned on a second straight line, the third battery string group and the first battery string group are positioned on one side of the second straight line, and the length of the side edge of the first battery string group is equal to that of the conductive end of the second battery string group.

In an exemplary embodiment of the present application, a diode is connected in anti-parallel between the conductive terminals of each of the battery string groups; or

At least two adjacent battery string groups are connected with the same diode in reverse parallel.

In an exemplary embodiment of the present application, the photovoltaic module further includes a transparent cover plate covering the front surface of the battery unit, and a pattern mark is disposed on an inner side or an outer side of the transparent cover plate corresponding to a position of the bus bar connecting the battery string.

In an exemplary embodiment of the present application, the photovoltaic module further includes a transparent cover plate covering the front surface of the battery unit, and a light emitting device is disposed on the transparent cover plate corresponding to a position of a bus bar connecting the battery string, and the light emitting device is located on the inner side or the outer side of the transparent cover plate.

In an exemplary embodiment of the present application, the photovoltaic module further includes a transparent cover plate covering the front surface of the battery unit, the transparent cover plate is provided with a covering layer, and an orthographic projection of a pattern of the covering layer on the battery unit is matched with a bus bar connecting the battery string group.

In an exemplary embodiment of the present application, the color of the cover layer is white, black or blue.

In an exemplary embodiment of the present application, two adjacent battery plates of the same battery string set are overlapped and connected in series through a conductive adhesive or a conductive wire.

In an exemplary embodiment of the present application, the photovoltaic module further comprises a junction box, the diode being located within the junction box; or

The diode is packaged in the battery unit.

The utility model provides a photovoltaic module, in the battery string group of the battery unit of rectangle, a battery string group's a conductive end all lies in a straight line with a side of adjacent battery string group, and these two adjacent battery string groups lie in same one side of this straight line, make when passing through the busbar with the conductive end of these two battery string groups and connect, this busbar extensible to battery string group between the conductive end, this extension can be used for the diode that connects in reverse parallel simultaneously, thereby reduce the quantity that sets up the busbar specially for the diode that connects in reverse parallel, practice thrift the busbar.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic view of a cell string of a photovoltaic module according to the present application.

Fig. 2 is a schematic view of a first embodiment of a photovoltaic module according to the present application.

fig. 3 is a schematic backside view of a first embodiment of a photovoltaic module according to the present application.

Fig. 4 is a schematic view of a second embodiment of a photovoltaic module according to the present application.

Fig. 5 is a schematic view of a third embodiment of a photovoltaic module according to the present application.

Fig. 6 is a schematic view of a fourth embodiment of a photovoltaic module according to the present application.

Fig. 7 is a schematic backside view of a fourth embodiment of a photovoltaic module according to the present application.

Fig. 8 is a schematic view of a fifth embodiment of a photovoltaic module according to the present application.

Fig. 9 is a schematic view of a sixth embodiment of a photovoltaic module according to the present application.

Fig. 10 is a back view schematically illustrating a second embodiment, a sixth embodiment, and an eighth embodiment of a photovoltaic module according to the present application.

Fig. 11 is a schematic view of a seventh embodiment of a photovoltaic module according to the present application.

Fig. 12 is a partial schematic view of a diode in a seventh embodiment of a photovoltaic module according to the present application.

Fig. 13 is another partial schematic view of a diode in a seventh embodiment of a photovoltaic module according to the present application.

Fig. 14 is a schematic view of an eighth embodiment of a photovoltaic module according to the present application.

Fig. 15 is a schematic view of a ninth embodiment of a photovoltaic module according to the present application.

Fig. 16 is a schematic view of a tenth embodiment of a photovoltaic module according to the present application.

Fig. 17 is a schematic backside view of a tenth embodiment of a photovoltaic module of the present application.

Fig. 18 is a schematic view of an eleventh embodiment of a photovoltaic module according to the present application.

In the figure: 100. a battery cell; 101. a blank region; 200. a battery string; 201. a battery piece; 202. punching a welding strip; 300. a junction box; 400. a nameplate; 1. a first battery string group; 2. a second battery string group; 3. a third battery string group; 4. a fourth battery string group; 5. a fifth battery string group; 6. a sixth battery string group; 7. a first bus bar; 8. a second bus bar; 9. a third bus bar; 10. a fourth bus bar; 11. a first diode; 12. a second diode; 13. a third diode; 14. and a fourth diode.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.

The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.

The embodiment of the application provides a photovoltaic assembly, which comprises at least one battery unit, wherein the battery unit is rectangular and comprises a plurality of electrically connected battery string groups, each battery string group comprises a plurality of parallel battery strings, and each battery string comprises a plurality of serially connected battery sheets; the battery string group is provided with two conductive ends and two side edges positioned between the two conductive ends; at least two adjacent battery string groups are arranged according to a preset mode, and the preset mode is as follows: a conductive end of one battery string group and one side edge of an adjacent battery string group are positioned on a straight line, and the two adjacent battery string groups are positioned on the same side of the straight line.

The photovoltaic module of this application embodiment, in the battery string group of the battery unit of rectangle, a battery string group's a conductive end and an adjacent battery string group's a side all lie in a straight line, and these two adjacent battery string groups lie in same one side of this straight line, make when passing through the bus bar with the conductive end of these two battery string groups and connect, this bus bar extendible is to between the conductive end of battery string group, this extension can be used for the anti-parallel diode simultaneously, thereby reduce the quantity that sets up the bus bar specially for anti-parallel diode, practice thrift the bus bar.

the battery unit is rectangular, namely square or rectangular. Each battery string set includes a plurality of battery strings connected in parallel, and as shown in fig. 1, the battery string 200 may include a plurality of battery slices 201 connected in series in sequence, for example, including 2 to 35 battery slices 201. The type of the battery sheet 201 is not particularly limited herein. In the same battery string 200, two adjacent battery pieces 201 can be overlapped and can be connected in series through conductive adhesive or metal wires; in addition, the battery string set may further include two perforated welding strips 202, one perforated welding strip 202 connected to the positive electrode of the battery string, and the other perforated welding strip 202 connected to the negative electrode of the battery string. Each battery string group is provided with two conductive ends and two side edges, the two side edges are positioned between the two conductive ends, and the two conductive ends are respectively a positive electrode and a negative electrode of the battery string group. The shape of the battery string group can be rectangular, including square and rectangle, and the shape of different battery string groups can be the same or different, and the size of different battery string groups can be the same or different. And a gap is formed between every two adjacent battery string groups for a bus bar connected with the battery string groups to pass through.

when photovoltaic module was two-sided subassembly of two glasss, in order to avoid terminal box and data plate to shelter from the battery unit back and cause the hot spot, can make battery unit have the blank region to terminal box, data plate are placed on the transparent cover plate corresponding with this blank region position, and this blank region is enclosed by a plurality of battery cluster group. Of course, the battery cell may not have a blank region.

In the first embodiment of the photovoltaic module of the present application, as shown in fig. 2, the battery unit 100 includes a first battery string group 1, a second battery string group 2, and a third battery string group 3, and the second battery string group 2 and the third battery string group 3 are both adjacent to the first battery string group 1 and are both located on the same side of the first battery string group 1.

A conductive end of the first battery string group 1 and a side edge of the second battery string group 2 are positioned on a first straight line, and the first battery string group 1 and the second battery string group 2 are positioned on one side of the first straight line; the other conductive end of the first battery string set 1 and one side of the third battery string set 3 are located on a second straight line, and the first battery string set 1 and the third battery string set 3 are located on one side of the second straight line.

The length of the side of the first battery string set 1 may be equal to the sum of the lengths of the conductive ends of the second and third battery string sets 2 and 3. If the lengths of the conductive end of the second battery string set 2 and the conductive end of the third battery string set 3 are equal, the length of the side of the first battery string set 1 is equal to twice the length of the conductive end of the second battery string set 2 or the third battery string set 3. So that the battery cell 100 does not have a blank region.

Of course, the length of the side edge of the first battery string set 1 may be greater than the sum of the lengths of the conductive ends of the second battery string set 2 and the third battery string set 3, so that there is a blank area between the second battery string set 2 and the third battery string set 3, that is, the battery unit 100 has a blank area, and the blank area may be used to place a nameplate and a terminal box to prevent the terminal box and the nameplate from shielding the back of the battery unit to cause hot spots.

In the second embodiment of the photovoltaic module of the present application, as shown in fig. 4, the battery unit 100 includes a first battery string set 1, a second battery string set 2, a third battery string set 3, and a fourth battery string set 4, the second battery string set 2 and the third battery string set 3 are both located between the first battery string set 1 and the fourth battery string set 4, such that the second battery string set 2 and the third battery string set 3 are both adjacent to the first battery string set 1, the second battery string set 2 and the third battery string set 3 are both adjacent to the fourth battery string set 4, and the third battery string set 3 is electrically connected to the fourth battery string set 4.

A conductive end of the first battery string group 1 and a side edge of the second battery string group 2 are positioned on a first straight line, and the first battery string group 1 and the second battery string group 2 are positioned on one side of the first straight line; the other conductive end of the first battery string set 1 and one side of the third battery string set 3 are located on the second straight line, and the first battery string set 1 and the third battery string set 3 are located on one side of the first straight line.

A conductive end of the fourth battery string group 4 and one side of the second battery string group 2 are positioned on the first straight line, and the fourth battery string group 4 and the second battery string group 2 are positioned on one side of the third straight line; the other conductive end of the fourth battery string group 4 and one side of the third battery string group 3 are located on a second straight line, and the third battery string group 3 and the fourth battery string group 4 are located on one side of the second straight line.

The lengths of the side edges of the first battery string set 1 and the fourth battery string set 4 are the same and are both greater than the sum of the lengths of the conductive ends of the second battery string set 2 and the third battery string set 3, so that the battery unit 100 has a blank area 101. For example, the first battery string set 1 and the fourth battery string set 4 are both rectangular, the second battery string set 2 and the third battery string set 3 are both square, and the length of the side of the first battery string set 1 and the fourth battery string set 4 is greater than the length of the conductive end of the second battery string set 2 and the third battery string set 3.

In a third embodiment of the photovoltaic module of the present application, as shown in fig. 5, a battery unit 100 includes a first battery string group 1, a second battery string group 2, a third battery string group 3, and a fourth battery string group 4, and the distribution of the battery string groups is the same as that of the second embodiment, and will not be described in detail here. Meanwhile, the lengths of the side edges of the first battery string set 1 and the fourth battery string set 4 are equal to the lengths of the conductive ends of the second battery string set 2 and the third battery string set 3, so that the battery unit 100 does not have a blank area 101 surrounded by the battery string sets.

In the fourth embodiment of the photovoltaic module of the present application, as shown in fig. 6, the battery unit 100 includes a first battery string set 1, a second battery string set 2, a third battery string set 3, and a fourth battery string set 4, the second battery string set 2 and the third battery string set 3 are both adjacent to the first battery string set 1, the second battery string set 2 and the third battery string set 3 are both adjacent to the fourth battery string set 4, and the third battery string set 3 is electrically connected to the fourth battery string set 4.

A conductive end of the first battery string set 1 and a side of the second battery string set 2 are located on a first straight line, and the first battery string set 1 and the second battery string set 2 are located on one side of the first straight line. A conductive end of the third battery string group 3 and a side of the first battery string group 1 are located on the second straight line, and the third battery string group 3 and the first battery string group 1 are located on one side of the second straight line.

A conductive end of the fourth battery string group 4 and a side edge of the third battery string group 3 are positioned on a third straight line, and the fourth battery string group 4 and the third battery string group 3 are positioned on one side of the third straight line; one side of the fourth battery string group 4 and one conductive end of the second battery string group 2 are located on a fourth straight line, and the second battery string group 2 and the fourth battery string group 4 are located on one side of the fourth straight line.

The areas occupied by the first straight line, the second straight line, the third straight line and the fourth straight line are the areas occupied by the battery cells 100; the first battery string group 1, the second battery string group 2, the third battery string group 3 and the fourth battery string group 4 are identical in shape and are all rectangular, and the length of the side edge of each battery string group is larger than that of the conductive end, so that a blank area can be formed by surrounding the battery string groups, and the battery unit 100 is provided with the blank area 101.

In a fifth embodiment of the photovoltaic module of the present application, as shown in fig. 8, a battery unit 100 includes a first battery string group 1, a second battery string group 2, a third battery string group 3, and a fourth battery string group 4, and the distribution manner of the battery string groups is the same as that of the fourth embodiment. The first battery string group 1, the second battery string group 2, the third battery string group 3 and the fourth battery string group 4 are identical in shape and are square, so that the length of the side edge of the first battery string group 1 is equal to the length of the conductive end of the second battery string group 2, and the battery unit 100 does not have a blank area surrounded by the battery strings.

In a sixth embodiment of the photovoltaic module of the present application, as shown in fig. 9, the battery unit 100 includes a first battery string set 1, a second battery string set 2, a third battery string set 3, and a fourth battery string set 4, the second battery string set 2 and the third battery string set 3 are both adjacent to the first battery string set 1, the second battery string set 2 and the third battery string set 3 are both adjacent to the fourth battery string set 4, and the third battery string set 3 is electrically connected to the fourth battery string set 4.

the areas occupied by the first straight line, the second straight line, the third straight line and the fourth straight line are the areas occupied by the battery units 100 and are rectangular; the lengths of the side edges of the first battery string set 1 and the fourth battery string set 4 are greater than the lengths of the conductive ends of the second battery string set 2 and the third battery string set 3, so that a blank area 101 is defined, and the battery unit 100 has the blank area 101.

In the seventh embodiment of the photovoltaic module of the present application, as shown in fig. 11, the number and distribution of the battery string sets of the battery unit 100 are the same as those of the sixth embodiment, the first battery string set 1 and the fourth battery string set 4 have the same shape and are both square, and the second battery string set 2 and the third battery string set 3 have the same shape and are rectangular; the lengths of the side edges of the first battery string set 1 and the fourth battery string set 4 are equal to the lengths of the conductive ends of the second battery string set 2 and the third battery string set 3, so that the battery unit 100 does not have a blank area 101 surrounded by the battery string sets.

In the eighth embodiment of the photovoltaic module of the present application, as shown in fig. 14, the battery unit 100 includes the first battery string group 1, the second battery string group 2, and the third battery string group 3, and the first battery string group 1, the second battery string group 2, and the third battery string group 3 are arranged in the same manner as in the sixth embodiment; meanwhile, the battery unit 100 further includes a fourth battery string group 4, a fifth battery string group 5, and a sixth battery string group 6, where the fourth battery string group 4 and the first battery string group 1 are in central symmetry with respect to the center of the battery unit 100, the fifth battery string group 5 and the second battery string group 2 are in central symmetry with respect to the center of the battery unit 100, and the sixth battery string group 6 and the third battery string group 3 are in central symmetry with respect to the center of the battery unit 100. The lengths of the side edges of the first battery string set 1 and the fourth battery string set 4 are greater than those of the conductive ends of the other battery string sets, so that a blank area 101 is defined, and the battery unit 100 has the blank area 101.

In the ninth embodiment of the photovoltaic module of the present application, as shown in fig. 15, the number and distribution of the battery strings of the battery unit 100 are the same as those of the seventh embodiment, and the lengths of the conductive ends of the second battery string 2 and the fifth battery string 5 are both equal to the lengths of the side edges of the first battery string 1 and the fourth battery string 4, so that the battery unit 100 does not have the blank region 101.

In a tenth embodiment of the photovoltaic module of the present application, as shown in fig. 16, the photovoltaic module includes two battery units 100 that are distributed in a rectangular shape, and the two battery units 100 are symmetrically distributed about a straight line therebetween, and at least one of the battery units 100 is the battery unit 100 in the fourth embodiment.

In the eleventh embodiment of the photovoltaic module of the present application, as shown in fig. 18, the photovoltaic module includes two battery units 100 that are distributed in a rectangular shape, and the two battery units 100 are symmetrically distributed about a straight line therebetween, and at least one of the battery units 100 is the battery unit 100 in the fifth embodiment, so that the photovoltaic module has two blank areas 101.

Based on the photovoltaic module of any one of the above embodiments, a diode can be connected in parallel between the conducting terminals of each cell string, so that the number of diodes is increased, and the hot spot effect is improved. Of course, a plurality of battery strings may be connected in parallel with a diode in an inverse direction, for example, at least two adjacent battery strings are connected in parallel with the same diode in an inverse direction.

For example, as shown in fig. 12 and 13, in the seventh embodiment, the first battery string set 1 and the second battery string set 2 may be connected by a first bus bar 7, the first battery string set 1 and the third battery string set 3 may be connected by a second bus bar 8, the third battery string set 3 and the fourth battery string set 1 may be connected by a third bus bar 9, and the fourth battery string set 4 and the second battery string set 2 may be connected by a fourth bus bar 10. The first diode 11 is connected between the first bus bar 7 and the second bus bar 8, the second diode 12 is connected between the second bus bar 8 and the third bus bar 9, the third diode 13 is connected between the first bus bar 7 and the fourth bus bar 10, and the fourth diode 14 is connected between the third bus bar 9 and the fourth bus bar 10.

The photovoltaic module may further include a junction box 300, and the respective diodes may be located in the junction box 300, and for the battery cells 100 having a blank area, the junction box 300 may be located in the blank area. Of course, the diode may be directly connected to the bus bar and packaged in the battery cell 100.

As shown in fig. 3, fig. 3 shows the back of the first embodiment of the photovoltaic module, and the back of the battery unit 100 is provided with a junction box 300.

As shown in fig. 7, fig. 7 shows the back of a fourth embodiment of the photovoltaic module, a junction box 300 and a nameplate 400 can be disposed in the blank area 101, the number of the junction boxes 300 is one, and each diode is located in the junction box 300.

As shown in fig. 10, fig. 10 shows the back of the second, sixth and eighth embodiments of the photovoltaic module, in the second, sixth and eighth embodiments, a junction box 300 and a nameplate 400 may be disposed in the blank region 101. The number of the junction boxes 300 is two, each diode is respectively located in two junction boxes 300, and the two junction boxes 300 are respectively located at both sides of the nameplate 400.

As shown in fig. 17, fig. 17 shows the back of the tenth embodiment of the photovoltaic module, in the tenth embodiment, the photovoltaic module includes two blank areas 101, and a junction box 300 and a nameplate 400 may be disposed in each blank area 101.

For cells with blank regions, the photovoltaic module of the present application may further include a transparent cover plate, which may be glass or other transparent material. The transparent cover plate can cover one side of the battery unit, and the inner side or the outer side of the transparent cover plate corresponding to the blank area can be provided with pattern marks. The inner side of the transparent cover plate is the side of the transparent cover plate close to the battery unit, and the outer side of the transparent cover plate is the side of the transparent cover plate far away from the battery unit. The specific structure of the pattern mark is not particularly limited, and the pattern mark may be an advertisement sign or the like adhered or otherwise fixed to the blank area, for example.

The transparent cover plate is provided with a light emitting device at a position corresponding to the blank region 101 or the bus bar between the battery strings, and the light emitting device is positioned at the inner side or the outer side of the transparent cover plate. The light emitting device may be an LED lamp or other light emitting device as long as it can emit light. The color of light emitted by the light emitting device is not particularly limited.

In one embodiment, the transparent cover plate covers the front surface of the battery unit, and the transparent cover plate is provided with a covering layer, and an orthographic projection of a pattern of the covering layer on the battery unit is matched with the bus bars or the blank areas of the battery string group, so that the bus bars or the blank areas in the gaps can be covered by the covering layer. The material of the covering layer can be an enamel layer, and the color of the covering layer can be white, black or blue, and of course, other colors can also be used.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

Claims

1. a photovoltaic module is characterized by comprising at least one battery unit, wherein the battery unit is rectangular; the battery unit comprises a plurality of electrically connected battery string groups, each battery string group comprises a plurality of parallel-connected battery strings, and each battery string comprises a plurality of battery sheets connected in series; the battery string group is provided with two conductive ends and two side edges positioned between the two conductive ends; at least two adjacent battery string groups are arranged according to a preset mode, wherein the preset mode is as follows:

2. The photovoltaic module of claim 1, wherein the battery unit comprises a first string, a second string, and a third string; the second battery string group and the third battery string group are both adjacent to the first battery string group;

3. The photovoltaic module of claim 2, wherein the battery unit further comprises a fourth battery string, the second battery string and the third battery string are each positioned adjacent to the fourth battery string, and the third battery string is electrically connected to the fourth battery string;

4. The photovoltaic module of claim 3, wherein the first, second, third, and fourth cell string groups are the same shape.

5. The assembly according to claim 1, wherein the cells do not have empty areas surrounded by the string of cells.

6. The photovoltaic module of claim 5, wherein the battery unit comprises a first string, a second string, and a third string; the second battery string group and the third battery string group are both adjacent to the first battery string group; a conductive end of the first battery string group and one side edge of the second battery string group are positioned on a first straight line, and the first battery string group and the second battery string group are positioned on one side of the first straight line; and one conductive end of the third battery string group and one side edge of the first battery string group are positioned on a second straight line, the third battery string group and the first battery string group are positioned on one side of the second straight line, and the length of the side edge of the first battery string group is equal to that of the conductive end of the second battery string group.

7. The photovoltaic module according to claim 1, wherein a diode is connected in anti-parallel between the conductive ends of each cell string group; or

8. The assembly according to claim 1, further comprising a transparent cover plate covering the front surface of the battery unit, wherein the transparent cover plate is provided with pattern marks on the inner side or the outer side corresponding to the positions of the bus bars connecting the battery strings.

9. The photovoltaic module according to claim 1, further comprising a transparent cover plate covering the front surface of the battery unit, wherein a light emitting device is disposed on the transparent cover plate corresponding to the position of the bus bar connecting the battery string, and the light emitting device is disposed on the inner side or the outer side of the transparent cover plate.

10. the photovoltaic module according to claim 1, further comprising a transparent cover plate covering the front surface of the battery unit, wherein the transparent cover plate is provided with a covering layer, and an orthographic projection of a pattern of the covering layer on the battery unit is matched with a bus bar connecting the battery string.

11. the photovoltaic module of claim 10, wherein the cover layer is white, black, or blue in color.

12. The photovoltaic module according to claim 1, wherein two adjacent cells of the same cell string set are overlapped and connected in series through a conductive adhesive or a wire.

13. The photovoltaic module of claim 7, further comprising a junction box, the diode being located within the junction box; or

The diode is packaged in the battery unit.