CN219040492U

CN219040492U - Photovoltaic module

Info

Publication number: CN219040492U
Application number: CN202222717617.8U
Authority: CN
Inventors: 耿越; 许贵军
Original assignee: Trina Solar Co Ltd
Current assignee: Trina Solar Co Ltd
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2023-05-16
Anticipated expiration: 2032-10-14

Abstract

The utility model relates to the technical field of photovoltaic power generation. In particular, it relates to a photovoltaic module. The photovoltaic module comprises a plurality of N-type battery strings and a plurality of P-type battery strings; the N-type battery string comprises a plurality of N-type battery pieces which are sequentially connected in series, and the P-type battery string comprises a plurality of P-type battery pieces which are sequentially connected in series; the N-type battery strings and the P-type battery strings are alternately distributed. According to the photovoltaic module, the P-type battery strings formed by connecting the P-type battery pieces in series and the N-type battery strings formed by connecting the N-type battery pieces in series are alternately distributed, so that the P-type battery pieces and the N-type battery pieces are packaged in the same photovoltaic module together, the power of the photovoltaic module can be improved, and meanwhile, the manufacturing difficulty of the photovoltaic module can be reduced.

Description

Photovoltaic module

Technical Field

The utility model relates to the technical field of photovoltaic power generation. In particular, it relates to a photovoltaic module.

Background

At present, photovoltaic power generation is one of the currently mainstream clean energy sources, and photovoltaic power generation is a technology for directly converting light energy into electric energy by utilizing the photovoltaic effect of a semiconductor interface. The solar energy power generation system mainly comprises three parts of a solar panel (assembly), a controller and an inverter, wherein the main parts are composed of electronic components. The solar cells are packaged and protected after being connected in series to form a large-area solar cell module, and then the solar cell module is matched with components such as a power controller and the like to form the photovoltaic power generation device.

Photovoltaic modules are important devices for converting light energy into electric energy, and are generally formed by packaging glass, adhesive films, batteries, welding strips, junction boxes and profiles, but the power of the existing photovoltaic modules is low.

Disclosure of Invention

The utility model aims at solving at least one of the technical problems in the prior art, and provides a photovoltaic module, wherein P-type battery strings and N-type battery strings are alternately distributed, so that P-type battery pieces and N-type battery pieces are jointly packaged in the same photovoltaic module, the power of the photovoltaic module can be improved, and meanwhile, the manufacturing difficulty of the photovoltaic module can be reduced.

The utility model provides a photovoltaic module, which comprises a plurality of N-type battery strings and a plurality of P-type battery strings; the N-type battery string comprises a plurality of N-type battery pieces which are sequentially connected in series, and the P-type battery string comprises a plurality of P-type battery pieces which are sequentially connected in series; the N-type battery strings and the P-type battery strings are alternately distributed.

Further, a plurality of N-type battery pieces in the N-type battery string are distributed along the first direction; a plurality of P-type battery pieces in the P-type battery string are distributed along a first direction; the N-type battery strings and the P-type battery strings are alternately arranged along a direction perpendicular to the first direction.

Further, the photovoltaic module further comprises a module positive electrode and a module negative electrode, wherein the module positive electrode and the module negative electrode are used for outputting voltage; the photovoltaic module further comprises: and the bypass diodes are connected in series and are arranged between the positive electrode of the component and the negative electrode of the component.

Further, the photovoltaic module further includes: a plurality of battery string groups, each battery string group comprising an N-type battery string and a P-type battery string connected in series; and the two ends of each battery string group are reversely connected with bypass diodes in parallel.

Further, the bypass diode, the component anode and the component cathode are arranged in the middle area of the photovoltaic component; the plurality of battery string groups comprise a first battery string group and a second battery string group, and the first battery string group and the second battery string group are symmetrically distributed on two sides of the middle area.

Further, two symmetrically distributed battery strings distributed on two sides of the middle area are connected with the same bypass diode in parallel.

Further, the battery pieces of the N-type battery string and the P-type battery string are connected in series through the interconnection strip; the ends of the N-type battery strings and the ends of the P-type battery strings in the battery string group are connected in series through bus bars.

Further, the number of N-type battery pieces in the N-type battery string is the same as the number of P-type battery pieces in the P-type battery string.

Further, the N-type battery string comprises twelve N-type battery pieces, and the P-type battery string comprises twelve P-type battery pieces.

Further, the N-type battery strings and the P-type battery strings are packaged by using a plastic film made of polyolefin elastomer.

The utility model has the following beneficial effects:

according to the photovoltaic module provided by the utility model, the open-circuit voltage of the photovoltaic module is improved by utilizing the advantage of higher open-circuit voltage of the N-type battery piece, so that the overall maximum power of the photovoltaic module is improved. Meanwhile, the manufacturing cost can be reduced by utilizing the characteristics of simple structure and lower manufacturing cost of the P-type battery piece. The P-type battery strings formed by connecting the P-type battery pieces in series and the N-type battery strings formed by connecting the N-type battery pieces in series are alternately distributed, so that the P-type battery pieces and the N-type battery pieces are packaged in the same photovoltaic module together, the power of the photovoltaic module can be improved, and the manufacturing cost of the photovoltaic module can be reduced.

Drawings

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

fig. 1 is a schematic circuit diagram of a photovoltaic module according to an embodiment of the present application.

Description of main reference numerals:

10. a photovoltaic module; 11. a component positive electrode; 12. a component negative electrode;

100. an N-type battery string; 110. an N-type battery piece;

200. a P-type battery string; 210. a P-type battery piece;

300. a battery string; 310. a first group of battery strings; 320. a second group of battery strings;

400. a bypass diode;

500. an interconnecting strip;

600. and a bus bar.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In order to better understand the aspects of the present application, a further detailed description of the present application will be provided below with reference to the accompanying drawings and detailed description.

Fig. 1 is a circuit schematic diagram of a photovoltaic module 10 according to an embodiment of the present application. Referring to fig. 1, a photovoltaic module 10 includes a plurality of N-type cell strings 100 and a plurality of P-type cell strings 200. The N-type battery string 100 includes a plurality of N-type battery pieces 110 sequentially connected in series, and the P-type battery string 200 includes a plurality of P-type battery pieces 210 sequentially connected in series. The N-type battery strings 100 and the P-type battery strings 200 are alternately arranged.

In some embodiments, the types of the N-type battery cell 110 and the P-type battery cell 210 are not particularly limited, and as an example, the N-type battery cell 110 and the P-type battery cell 210 are crystalline silicon battery cells, for example, may be single crystal battery cells or polycrystalline battery cells.

In some embodiments, all P-type cells 210 use the same efficiency cells. All N-type cells 110 use the same efficiency cells to reduce the fit.

The photovoltaic module 10 provided by the utility model can improve the open-circuit voltage of the photovoltaic module 10 by utilizing the advantage of higher open-circuit voltage of the N-type battery piece 110, so as to improve the overall maximum power of the photovoltaic module 10. Meanwhile, the characteristics of simple structure and low manufacturing cost of the P-type battery piece 210 can be utilized to reduce the manufacturing cost. The P-type battery strings 200 formed by connecting the P-type battery pieces 210 in series and the N-type battery strings 100 formed by connecting the N-type battery pieces 110 in series are alternately distributed, so that the P-type battery pieces 210 and the N-type battery pieces 110 are packaged in the same photovoltaic module 10 together, the power of the photovoltaic module 10 can be improved, and the manufacturing cost of the photovoltaic module 10 can be reduced.

It should be noted that, the welding difficulty between the same type of battery pieces is low, for example, the N-type battery piece 110 and the N-type battery piece 110 are the same type of battery pieces, the P-type battery piece 210 and the P-type battery piece 210 are the same type of battery pieces, that is, the welding difficulty between the N-type battery piece 110 and the N-type battery piece 110 is low, and the welding difficulty between the P-type battery piece 210 and the P-type battery piece 210 is low. In the present embodiment, the N-type battery strings 100 and the P-type battery strings 200 are all connected in series with the same type of battery piece, that is, the N-type battery strings 100 are connected in series with the N-type battery piece 110, and the P-type battery strings 200 are connected in series with the P-type battery piece 210. Therefore, the welding between the battery pieces of different types can be reduced, so that the welding difficulty of the photovoltaic module 10 can be reduced, and the manufacturing difficulty of the photovoltaic module 10 can be further reduced.

Specifically, the plurality of N-type battery cells 110 in the N-type battery string 100 are arranged in a distribution along the first direction. The plurality of P-type battery cells 210 in the P-type battery string 200 are distributed along the first direction. The N-type battery strings 100 and the P-type battery strings 200 are alternately arranged in a direction perpendicular to the first direction.

Referring to fig. 1, the x direction may be the first direction described above, and the Y direction may be a direction perpendicular to the first direction. That is, referring to fig. 1, a plurality of N-type battery cells 110 in an N-type battery string 100 are arranged in a distributed manner in the X-direction. The plurality of P-type battery cells 210 in the P-type battery string 200 are distributed along the X-direction. The N-type battery strings 100 and the P-type battery strings 200 are alternately arranged in the Y direction.

In some embodiments, the photovoltaic module 10 may be a square module and the first direction may be a long side direction of the photovoltaic module 10. That is, the plurality of N-type cells 110 in the N-type cell string 100 are distributed along the longitudinal direction of the photovoltaic module 10. The plurality of P-type cells 210 in the P-type cell string 200 are distributed along the longitudinal direction of the photovoltaic module 10. The N-type cell strings 100 and the P-type cell strings 200 are alternately arranged along the short side direction of the photovoltaic module 10, so that the photovoltaic module 10 is simple in layout and space-saving.

Referring to fig. 1, the photovoltaic module 10 further includes a module positive electrode 11 and a module negative electrode 12, and the module positive electrode 11 and the module negative electrode 12 are used for outputting a voltage. The photovoltaic module 10 further includes: the bypass diodes 400 are connected in series, and the bypass diodes 400 are arranged between the module anode 11 and the module cathode 12.

Referring to fig. 1, the photovoltaic module 10 further includes a plurality of cell strings 300. Each battery string set 300 includes one N-type battery string 100 and one P-type battery string 200 connected in series. Wherein, the two ends of each battery string 300 are reversely connected in parallel with the bypass diode 400.

It should be noted that, the shaded solar cell modules in one of the series cell branches are used as loads to consume energy generated by other solar cell modules with illumination, and the shaded solar cell modules generate heat at this time, which is the hot spot effect. The heat generated by this effect can severely damage the photovoltaic module. And part of the energy generated by the illuminated solar cell may be consumed by the shaded cell. Therefore, in order to prevent the photovoltaic module 10 from being damaged due to the hot spot effect in the present embodiment, the bypass diode 400 is connected in anti-parallel to the two ends of each cell string 300, so as to avoid the energy generated by the photovoltaic module 10 from being consumed by the shielded module. In the whole photovoltaic module 10, the N-type battery pieces 110 are connected in series to form the N-type battery string 100, so that when any N-type battery piece in one N-type battery string 100 is shielded, at least no influence is caused on other N-type battery pieces except the N-type battery string 100; similarly, the P-type battery cells 210 are connected in series to form the P-type battery string 200, so that when any P-type battery cell in a certain P-type battery string 200 is blocked, at least no influence is caused on the P-type battery cells 210 outside the P-type battery string 200, and the hot spot effect can be further effectively prevented.

It can be understood that only when a certain battery string 300 is in an abnormal condition, the bypass diode 400 connected in parallel to the battery string 300 is turned on, so that the bypass diode 400 is connected to the circuit, and the normal operation of the circuit is ensured. When all the battery string groups 300 are operating normally, the N-type battery string 100 and the P-type battery string 200 located in either one of the two sides of the middle region are connected in series.

Referring to fig. 1, a bypass diode 400, a module anode 11, and a module cathode 12 are disposed in a middle region of a photovoltaic module 10. The plurality of battery string groups include a first group of battery string groups 310 and a second group of battery string groups 320, and the first group of battery string groups 310 and the second group of battery string groups 320 are symmetrically arranged at both sides of the middle region.

It is understood that the first and second

battery string groups

310 and 320 are symmetrically disposed at both sides of the middle region, that is, the number of the battery string groups 300 in the first battery string group 310 is the same as the number of the battery string groups 300 in the second battery string group 320, that is, the number of the N-type battery strings 100 and the P-type battery strings 200 in the first battery string group 310 is the same as the number of the N-type battery strings 100 and the P-type battery strings 200 in the second battery string group 320, respectively, for example, the photovoltaic module 10 includes six N-type battery strings 100 and six P-type battery strings 200, the first battery string group 310 located at the left side of the middle region includes three N-type battery strings 100 and three P-type battery strings 200, and the second battery string group 300 located at the right side of the middle region includes three N-type battery strings 100 and three P-type battery strings 200.

The two symmetrically distributed cell string groups 300 distributed on both sides of the middle region are connected in parallel with the same bypass diode 400 to simplify the layout of the photovoltaic module 10.

Referring to fig. 1, the battery cells of both the n-type battery string 100 and the P-type battery string 200 are connected in series by an interconnection bar 500. The ends of the N-type battery string 100 and the P-type battery string 200 in the battery string set 300 are connected in series by the bus bar 600.

The number of N-type battery cells 110 in the N-type battery string 100 is the same as the number of P-type battery cells 210 in the P-type battery string 200 to improve the aesthetic appearance of the photovoltaic module 10.

In some embodiments, the first group of battery strings 310 may include 2 to 5 battery strings 300, and the second group of battery strings 320 may include 2 to 5 battery strings 300 therein.

In some embodiments, the number of N-type battery cells 110 in the N-type battery string 100 may be 9 to 15. The number of P-type battery cells 210 in the P-type battery string 200 may be 9 to 15.

Preferably, the N-type battery string 100 includes twelve N-type battery cells 110, and the P-type battery string 200 includes twelve P-type battery cells 210.

It should be noted that, for the photovoltaic module 10, the cells are generally square, and each cell is arranged in an array of M rows and N columns, where M and N are positive integers.

For ease of understanding, the photovoltaic module 10 in this embodiment will be explained by taking m=6 and n=24 columns as examples.

The component anode 11, all bypass diodes 400 and the component cathode 12 are taken as intermediate areas, 6 rows and 12 columns of battery pieces are respectively distributed on two sides of the intermediate areas, and the battery pieces and circuit arrangement on two sides of the intermediate areas are symmetrically distributed.

The 1 st column to the 12 th column in the 1 st row are distributed to be N type battery pieces, the 1 st column to the 12 th column in the 2 nd row are distributed to be P type battery pieces, the 1 st column to the 12 th column in the 3 rd row are distributed to be N type battery pieces, the 1 st column to the 12 th column in the 4 th row are distributed to be P type battery pieces, the 1 st column to the 12 th column in the 5 th row are distributed to be N type battery pieces, and the 1 st column to the 12 th column in the 6 th row are distributed to be P type battery pieces.

Taking the left side area of the middle area as an example, N-type battery pieces distributed from the 1 st column to the 12 th column in the 1 st row are connected in series to form an N-type battery string, P-type battery pieces distributed from the 1 st column to the 12 th column in the 2 nd row are connected in series to form a P-type battery string, N-type battery pieces distributed from the 1 st column to the 12 th column in the 3 rd row are connected in series to form an N-type battery string, P-type battery pieces distributed from the 1 st column to the 12 th column in the 4 th row are connected in series to form a P-type battery string, N-type battery pieces distributed from the 1 st column to the 12 th column in the 5 th row are connected in series to form an N-type battery string, and P-type battery pieces distributed from the 1 st column to the 12 th column in the 6 th row are connected in series to form a P-type battery string.

Similarly, in the right region of the middle region, N-type battery pieces distributed from 13 th column to 24 th column in the 1 st row are connected in series to form an N-type battery string, P-type battery pieces distributed from 13 th column to 24 th column in the 2 nd row are connected in series to form an N-type battery string, N-type battery pieces distributed from 13 rd column to 24 th column in the 3 rd row are connected in series to form an N-type battery string, P-type battery pieces distributed from 13 th column to 24 th column in the 4 th row are connected in series to form an N-type battery string, N-type battery pieces distributed from 13 th column to 24 th column in the 5 th row are connected in series to form a P-type battery string, and P-type battery pieces distributed from 13 th column to 24 th column in the 6 th row are connected in series to form a P-type battery string.

The left N-type battery string and the 2 nd P-type battery string are connected in series to form a battery string group, the right N-type battery string and the 2 nd P-type battery string are connected in series to form a battery string group, and two ends of the two battery string groups are connected with the same bypass diode in parallel.

The left N-type battery string and the 4-type battery string are connected in series to form a battery string group, the right N-type battery string and the 4-type battery string are connected in series to form a battery string group, and two ends of the two battery string groups are connected with the same bypass diode in parallel.

The N-type battery string of the 5 th row and the P-type battery string of the 6 th row on the left side are connected in series to form a battery string group, the N-type battery string of the 5 th row and the P-type battery string of the 6 th row on the right side are connected in series to form a battery string group, and two ends of the two battery string groups are connected with the same bypass diode in parallel.

In some embodiments, the plurality of N-type battery strings and the plurality of P-type battery strings are encapsulated with a film of polyolefin elastomer material.

Specifically, the front surface of the N-type battery piece is generally in POE film encapsulation, and the back surface of the N-type battery piece is generally in EVA film encapsulation; the front surface of the P-type battery piece is generally packaged by EVA film, and the back surface of the P-type battery piece is generally packaged by POE film. In this embodiment, the P-type battery piece and the N-type battery piece are packaged together in the same photovoltaic module, so that when in packaging, the front and back surfaces of the N-type battery piece and the front and back surfaces of the P-type battery piece both adopt polyolefin elastomer (polyolefin thermoplastic elastomer, abbreviated as POE), so that the packaging film materials of the photovoltaic module can be unified, and potential induced attenuation can be reduced.

In some embodiments, the component type of the photovoltaic component is not particularly limited, and may be, for example, a half-cut component layout or a full-piece component layout.

In the description of the present utility model, it is to be understood that the term "first" is used for descriptive purposes only and is not to be interpreted as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

In the description of the present specification, reference to the terms "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means 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, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present utility model, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the utility model, and are also considered to be within the scope of the utility model.

Claims

1. The photovoltaic module is characterized by comprising a plurality of N-type battery strings and a plurality of P-type battery strings;

the N-type battery string comprises a plurality of N-type battery pieces which are sequentially connected in series, and the P-type battery string comprises a plurality of P-type battery pieces which are sequentially connected in series;

the N-type battery strings and the P-type battery strings are alternately distributed.

2. The photovoltaic module of claim 1, wherein the photovoltaic module comprises,

the plurality of N-type battery pieces in the N-type battery string are distributed along a first direction;

the plurality of P-type battery pieces in the P-type battery string are distributed along the first direction;

the N-type battery strings and the P-type battery strings are alternately distributed along a direction perpendicular to the first direction.

3. The photovoltaic module according to claim 1 or 2, further comprising a module positive electrode and a module negative electrode for outputting a voltage; the photovoltaic module further includes:

and the bypass diodes are connected in series, and the bypass diodes are arranged between the positive electrode of the assembly and the negative electrode of the assembly.

4. The photovoltaic module of claim 3, further comprising:

a plurality of battery string groups, each of the battery string groups including one of the N-type battery strings and one of the P-type battery strings connected in series;

the bypass diodes are reversely connected in parallel at two ends of each battery string group.

5. The photovoltaic module of claim 4, wherein the photovoltaic module comprises,

the bypass diode, the component anode and the component cathode are arranged in the middle area of the photovoltaic component;

the plurality of battery string groups comprise a first battery string group and a second battery string group, and the first battery string group and the second battery string group are symmetrically distributed on two sides of the middle area.

6. The photovoltaic module of claim 5, wherein two symmetrically distributed strings of cells distributed on both sides of the middle region are connected in parallel with the same bypass diode.

7. The photovoltaic module of claim 4, wherein the cells of the N-type cell string and the P-type cell string are each connected in series by an interconnect bar;

the end of the N-type battery string and the end of the P-type battery string in the battery string group are connected in series through a bus bar.

8. The photovoltaic module of claim 1, wherein the number of N-type cells in the N-type cell string is the same as the number of P-type cells in the P-type cell string.

9. The photovoltaic module of claim 1, wherein the photovoltaic module comprises,

the N-type battery string comprises twelve N-type battery pieces, and the P-type battery string comprises twelve P-type battery pieces.

10. The photovoltaic module of claim 1, wherein the plurality of N-type cell strings and the plurality of P-type cell strings are encapsulated with a polyolefin elastomer adhesive film.