CN113489452A

CN113489452A - Photovoltaic module

Info

Publication number: CN113489452A
Application number: CN202110870959.0A
Authority: CN
Inventors: 李令先; 周艳方; 王樱
Original assignee: JA Solar Technology Yangzhou Co Ltd
Current assignee: Jingao Yangzhou New Energy Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2021-10-08

Abstract

A photovoltaic module is provided herein. The photovoltaic assembly comprises one or more battery units, an end junction box and a frame; each of the battery cells includes a plurality of battery pieces that are arranged in an array in a first direction and in a second direction substantially perpendicular to the first direction, and that are electrically connected to form a plurality of battery strings having the battery pieces connected in series; the end terminal block includes a diode connected in parallel with a battery string bypassing a corresponding battery cell, and a cable connector for connecting the battery string in the battery cell to a cable; the frame is arranged at the periphery of one or more battery units; the end terminal block is offset toward the bezel in both the first direction and the second direction with respect to a center of the array of the plurality of battery cells of the corresponding battery cell.

Description

Photovoltaic module

Technical Field

The present disclosure relates to a photovoltaic module.

Background

Photovoltaic modules typically include a plurality of cells that receive light energy, such as from the sun, and convert the light energy into electrical energy. In order to lead out the electric energy generated by the plurality of battery pieces, the plurality of battery pieces are electrically connected in series and/or parallel by a solder ribbon and a bus bar, and are connected to a cable by the bus bar to lead out the electric energy. In addition, the photovoltaic module further comprises a diode, wherein the diode is connected with one or more battery pieces in the photovoltaic module in parallel to enable the one or more battery pieces to be short-circuited in the case that the one or more battery pieces cannot normally work (generate electricity), so that local overheating of the photovoltaic module caused by the abnormal work is avoided. By providing a junction box, diodes and cable joints between busbars and cables in a photovoltaic module can be accommodated.

Junction boxes are typically placed near the center of the frame of the photovoltaic assembly, which results in increased length of the cables, thereby increasing the cost of the photovoltaic assembly. In addition, the manner of providing a junction box near the center also increases the wiring difficulty, thereby making installation difficult.

Disclosure of Invention

At least some embodiments of the present disclosure provide a photovoltaic assembly that includes one or more cells, an end junction box, and a bezel. Each battery unit includes a plurality of battery pieces that are arranged in an array in a first direction and in a second direction substantially perpendicular to the first direction, and that are electrically connected to form a plurality of battery strings having the battery pieces connected in series. The end terminal block includes diodes connected in parallel with the battery strings of the respective battery cells, and cable tabs for connecting the battery strings in the battery cells to a cable. The frame is disposed at the periphery of one or more battery cells. The end terminal block is offset toward the bezel in both the first direction and the second direction with respect to a center of the array of the plurality of battery cells of the corresponding battery cell.

For example, in some embodiments, multiple batteries are connected in series and parallel.

For example, in some embodiments, the plurality of battery slices of the battery string are arranged in the first direction.

For example, in some embodiments, the end junction box is closer to a cell sheet adjacent the bezel in the first direction than other cell sheets in the respective cell.

For example, in some embodiments, the end junction box is closer to a cell sheet adjacent the bezel in the second direction than other cell sheets in the respective cell.

For example, in some embodiments, the end junction box is closer to the bezel in the second direction than all of the cells of the respective battery cell.

For example, in some embodiments, the one or more cells include two end cells located at both ends of the photovoltaic assembly in the first direction and at least one intermediate cell between the cells and the cell. The photovoltaic assembly also includes a non-terminal junction box including a diode connected in parallel with the battery string of the third battery cell.

For example, in some embodiments, the non-end junction boxes are positioned in the center of the array of battery tabs of the respective middle battery cell in the first direction and the second direction.

For example, in some embodiments, the end junction box is offset from the bezel in the first direction or in the second direction relative to a centerline of the array of the plurality of cells of the respective battery cell by more than 0.1%, such as more than 1%, such as more than 10%, such as more than 20%, such as more than 30%, such as more than 40%, such as 0.1-30%, such as 10-40%, such as about 50%, such as 10-30%, such as 0.1%, 0.2%, or more than 0.1%, such as more than 1%, such as more than 10%, such as more than 20%, such as more than 30%, such as more than 40%, such as more than 0.1-40%, such as 0.1-30%, such as 10-40%, such as about 50%, such as 10-30%, such as 0.1%, or more than 0.2%,

0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 2.0%, 3.0%, 4.0%, 5.0%, 6.0%, 7.0%, 8.0%, 9.0%, 10%, 13%, 15%, 18%, 20%, 21%, 23%, 25%, 28%, 30%, 33%, 35%, 38%, 40%, 43%, 45%, 48%, approximately 50% (adjacent to the border), etc.

Drawings

Fig. 1 shows a schematic circuit diagram of a photovoltaic module;

fig. 2 shows a circuit schematic of a photovoltaic module according to a first embodiment of the present disclosure;

FIG. 3 shows a schematic plan view of a plurality of the photovoltaic modules shown in FIG. 2, viewed from the backlight side of the photovoltaic module;

FIG. 4 illustrates an exploded perspective view of the photovoltaic module shown in FIG. 2;

fig. 5 shows a circuit schematic of a photovoltaic module according to a second embodiment of the present disclosure;

fig. 6 shows a circuit schematic of a photovoltaic module according to a third embodiment of the present disclosure;

fig. 7 shows a circuit schematic of a photovoltaic module according to a fourth embodiment of the present disclosure;

FIG. 8 shows a schematic plan view of a plurality of the photovoltaic modules shown in FIG. 7, viewed from the backlight side of the photovoltaic module;

fig. 9 shows a circuit schematic of a photovoltaic module according to a fifth embodiment of the present disclosure;

fig. 10 shows a circuit schematic of a photovoltaic module according to a sixth embodiment of the present disclosure.

Wherein the reference numerals are:

photovoltaic module

100, 300

First battery cell

110, 310

First battery string

111, 311

Second battery cell

120, 320

Second cell string

121, 321

Third battery unit

130, 330

Third battery string

131, 331

Fourth battery cell 140

Fourth battery string 141

First junction box 71

First diodes

711, 371

First cable joint 712

Second junction box 72

Second diode

721, 372

Second cable connector 722

Third terminal box 73

Third diodes 731, 373

Fourth terminal box 74

Fourth diode 741

Cable 80

Back plate 1

First encapsulation layer 2

Array 3

Connecting wire 4

Second encapsulation layer 5

Cover plate 6

Detailed Description

Hereinafter, a photovoltaic module according to an embodiment of the present disclosure is described in detail with reference to the accompanying drawings.

Herein, the "light receiving side" of the photovoltaic module refers to an illumination side of the photovoltaic module that receives light, and the "backlight side" refers to the other side of the photovoltaic module opposite to the light receiving side. The "arrangement plane" of the photovoltaic module refers to a plane on which a plurality of cells of the photovoltaic module are arranged. "Cable" means an electrical connection line that includes an inner conductor and an outer insulator surrounding the inner conductor.

Fig. 1 shows a schematic circuit diagram of a photovoltaic module 300. As shown in fig. 1, the photovoltaic module 300 includes a plurality of cells arranged in an array in a first direction X and in a second direction Y substantially perpendicular to the first direction X. A plurality of first ones of the plurality of battery cells arranged in an array form a first battery unit 310, a plurality of second ones of the plurality of battery cells arranged in an array form a second battery unit 320, and a plurality of third ones of the plurality of battery cells arranged in an array form a third battery unit 330. The first battery cell 310, the second battery cell 320 and the third battery cell 330 are connected in series, wherein the first battery cell 310 and the second battery cell 320 are located at both ends of the photovoltaic module, and the third battery cell 330 is located between the first battery cell 310 and the second battery cell 320. Specifically, the first battery unit 310 includes a plurality of first battery strings 311 connected in parallel, the second battery unit 320 includes a plurality of second battery strings 321 connected in parallel, and the third battery unit 330 includes a plurality of third battery strings 331 connected in parallel. The first cell string 311 includes a plurality of first cells arranged in the first direction X (i.e., arranged in a row in the first direction X) connected in series, the second cell string 321 includes a plurality of second cells arranged in the first direction X connected in series, and the third cell string 331 includes a plurality of third cells arranged in the first direction X connected in series. In addition, the photovoltaic module further includes a first diode 371 connected in series with the plurality of first cell strings 311, a second diode 372 connected in series with the plurality of second cell strings 321, and a third diode 373 connected in series with the plurality of third cell strings 311.

In the photovoltaic module, the first diode 371, the second diode 372 and the third diode 373 are located at the center of the

corresponding battery cells

310, 320 and 330. Therefore, the junction box that accommodates these

diodes

371, 372, and 373 is located near the center of the photovoltaic module 300, which will result in an increase in the length of the cable for connecting the photovoltaic module 300 to another device (such as another photovoltaic module) and an increase in the difficulty of installation.

According to one embodiment of the present disclosure, a photovoltaic assembly is provided that includes one or more cells, an end junction box, and a bezel. Each battery unit includes a plurality of battery pieces that are arranged in an array in a first direction and in a second direction substantially perpendicular to the first direction, and that are electrically connected to form a plurality of battery strings having the plurality of battery pieces connected in series. The end terminal block includes diodes connected in parallel with the battery strings of the respective battery cells, and cable tabs for connecting the battery strings in the battery cells to a cable. The frame is disposed at the periphery of one or more battery cells. The end terminal block is offset toward the bezel in both the first direction and the second direction with respect to a center of the array of the plurality of battery cells of the corresponding battery cell.

Because the end box is offset toward the bezel, the end box can be easily accessed by an operator, such as an installer or maintenance person, facilitating the operator's installation and maintenance of the first box. In addition, due to the fact that the end junction boxes deviate towards the frame, cables connected to the end junction boxes can be connected with other devices in a smaller length, and the cost of the photovoltaic module and the power loss of the cables are reduced.

In some embodiments, "offset" refers to the end junction box being offset from the center line of the array of the plurality of battery cells of the corresponding battery unit in the first direction or in the second direction toward the bezel by, for example, more than 0.1%, such as more than 1%, such as more than 10%, such as more than 20%, such as more than 30%, such as more than 40%, such as 0.1-30%, such as 10-40%, such as about 50%, such as 10-30%, such as 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 2.0%, 3.0%, 4.0%, 5.0%, 6.0%, 7.0%, 8.0%, or more than 0% of the component dimension in the corresponding direction of the bezel (e.g., the length of the bezel in the first direction or the bezel or the width of the bezel in the second direction) 9.0%, 10%, 13%, 15%, 18%, 20%, 21%, 23%, 25%, 28%, 30%, 33%, 35%, 38%, 40%, 43%, 45%, 48%, approximately 50% (adjacent to the bezel), etc.

In some embodiments, for example, in a photovoltaic module having a bezel dimension of about 2290mm in length by about 1142mm in width, "offset" refers to more than 50 mm.

In this context, the term "substantially perpendicular" is meant to not exclude significant deviations, and may for example include deviations from angles of 20 ° or less, or 10 ° or less, or 5 ° or less, or 3 ° or less, or 2 ° or less, or 1 ° or less.

Fig. 2 shows a circuit schematic of a photovoltaic module 100 according to a first embodiment of the present disclosure, and fig. 3 shows a plan view schematic of a plurality of the photovoltaic modules 100 shown in fig. 2, viewed from a backlight side of the photovoltaic module 100.

As shown in fig. 2 and 3, the photovoltaic module 100 includes a plurality of cells arranged in an array of 6 (columns/rows) × 24 (rows/columns) in a first direction X and in a second direction Y substantially perpendicular to the first direction X, and a frame 150 of the photovoltaic module surrounding the cells. A plurality of first ones of the plurality of battery pieces arranged in a 6 (column/row) × 8 (row/column) array constitute the first battery unit 110 (i.e., the end battery unit 110), a plurality of second ones of the plurality of battery pieces arranged in a 6 (column/row) × 8 (row/column) array constitute the second battery unit 120 (i.e., the end battery unit 120), and a plurality of third ones of the plurality of battery pieces arranged in a 6 (column/row) × 8 (row/column) array constitute the third battery unit 130 (i.e., the middle battery unit 130). The first battery cell 110, the second battery cell 120, and the third battery cell 130 are connected in series, wherein the first battery cell 110 and the second battery cell 120 are located at both ends of the photovoltaic module 100, and the third battery cell 130 is located between the first battery cell 110 and the second battery cell 120. Specifically, the first battery unit 110 includes 6 first battery strings 111 connected in parallel, the second battery unit 120 includes 6 second battery strings 121 connected in parallel, and the third battery unit 130 includes 6 third battery strings 131 connected in parallel. The first cell string 111 includes 8 first cells arranged in the first direction X connected in series, the second cell string 121 includes 8 second cells arranged in the first direction X connected in series, and the third cell string 131 includes 8 third cells arranged in the first direction X connected in series. In addition, the photovoltaic module 100 further includes a first diode 711 connected in parallel with the plurality of first cell strings 111, a second diode 721 connected in parallel with the plurality of second cell strings 121, a third diode 731 connected in parallel with the plurality of third cell strings 131, a first cable connector 712 connecting negative terminals of the plurality of first cell strings 111 to the cable 80, and a second cable connector 722 connecting positive terminals of the plurality of second cell strings 121 to the cable 80. The first diode 711 and the first cable connector 712 are disposed within a housing (not shown) of the first terminal block 71 (i.e., the terminal block 71; schematically shown in dashed lines in fig. 2), the second diode 721 and the second cable connector 722 are disposed within a housing (not shown) of the second terminal block 72 (i.e., the terminal block 72; schematically shown in dashed lines in fig. 2), and the third diode 731 is disposed within a housing (not shown) of the third terminal block 73 (i.e., the non-terminal block 73; schematically shown in dashed lines in fig. 2). The first terminal block 71, the second terminal block 72, and the third terminal block 73 are disposed within the bezel 150.

In the present embodiment, the first terminal block 71 including the first diode 711 and the first cable connector 712 is offset toward the bezel 150 in both the first direction X and the second direction Y with respect to the center of the array of the plurality of first battery cells, and the second terminal block 72 including the second diode 721 and the second cable connector 722 is offset toward the bezel 150 in both the first direction X and the second direction Y with respect to the center of the array of the plurality of second battery cells. Specifically, the first junction box 71 is located between two first battery strings 111 adjacent to the left side frame 150 in the second direction Y, and is closer to a first battery piece adjacent to the upper side frame 150 than other first battery pieces in the first direction X. The second junction box 72 is located between two second cell strings 121 adjacent to the left side frame 150 in the second direction Y, and is closer to a second cell sheet adjacent to the lower side frame 150 than other second cell sheets in the first direction X.

Since the first junction box 71 and the second junction box 72 are disposed close to the frame 150, the first junction box 71 and the second junction box 72 are more easily accessed by an operator, which facilitates the operation of the first junction box 71 and the second junction box 72 by the operator. In addition, since the first and

second junction boxes

71 and 72 are disposed close to the bezel 150, the length of the cable 80 is reduced, and the cost of the photovoltaic module 100 and the power loss due to the cable 80 are reduced.

Fig. 3 shows that such 3 photovoltaic modules 100 are connected in a first direction X. As shown in fig. 3, the first junction box 71 of the photovoltaic module 100 located at one end (left side end) is connected to the second junction box 72 of the photovoltaic module 100 located in the middle by a cable 80 to connect the negative end of the photovoltaic module 100 located at one end (i.e., the negative ends of the plurality of first cell strings 111 of the first cell unit 110 of the photovoltaic module 100) to the positive end of the photovoltaic module 100 located in the middle (i.e., the positive ends of the plurality of second cell strings 121 of the second cell unit 120 of the photovoltaic module 100), and the second junction box 72 of the photovoltaic module 100 located at the other end (right side end) is connected to the first junction box 71 of the photovoltaic module 100 located in the middle by a cable 80 to connect the positive end of the photovoltaic module 100 located at the other end to the negative end of the photovoltaic module 100 located in the middle. It can be seen that the photovoltaic module 100 according to the present embodiment allows connection of the photovoltaic module 100 with devices such as other photovoltaic modules with a shorter cable 80, compared to a photovoltaic module in which the first junction box is located at the center position of the first battery cell and the second junction box is located at the center position of the second battery cell.

In the present embodiment, the third junction box 73 including the third diode 731 is positioned at the center of the array of the plurality of third battery cells in the first direction X and the second direction Y. The location of the third terminal block 73 facilitates conventional mass production and installation.

Fig. 4 illustrates an exploded perspective view of the photovoltaic module 100 shown in fig. 2. As shown in fig. 4, the photovoltaic module 100 includes, from the backlight side to the light-receiving side in a direction substantially perpendicular to the arrangement plane, a back sheet 1, a first encapsulating layer 2, an array 3 formed of a plurality of battery pieces, a second encapsulating layer 5, and a cover sheet 6. The plurality of battery pieces are connected by connection lines 4 such as solder ribbons and bus bars. The first junction box 71, the second junction box 72, and the third junction box 73 are provided on the back panel 1. The first and

second junction boxes

71 and 72 are also connected to a cable 80. Specifically, the back plate 1 and the cover plate 6 may be a glass back plate or a laminate of polymers, or the like. The first and second encapsulating layers 2 and 5 may be EVA (ethylene vinyl acetate), POE (polyethylene-octene elastomer), or the like.

It should be noted that the cells of the photovoltaic module 100 may have other numbers, arrangements and connection manners, the photovoltaic module 100 may have other numbers of cells, the cells of each cell may have other numbers, arrangements and connection manners, and each cell string may have other numbers of cells. For example, three first battery strings 111 located at the left side of the first battery unit 110 may be connected in parallel and then connected in series with three first battery strings 111 located at the right side of the first battery unit 110, and six second battery strings 121 and six third battery strings 131 are arranged similarly to the six first battery strings 111. In this case, the first diode 711 may be provided to be connected in parallel with all the first battery strings 111 after being connected in series or one first diode 711 and one additional diode may be provided to be connected in parallel with the three first battery strings 111 on the left side and the three first battery strings 111 on the right side, respectively. In the case where one first diode 711 and one additional diode are provided, the other diode may be provided in the first junction box 71 together with the first diode 711 and the first cable connector 712, or may be provided in a separate junction box.

The battery cell may be a substantially square battery cell, a rectangular battery cell obtained by equally cutting the substantially square battery cell into two, three, four, five, six, or the like, or a rectangular or non-rectangular battery cell obtained by unequally cutting the substantially square battery cell into two, three, four, five, six, or the like.

It should be noted that the three connected photovoltaic modules 100 are arranged in the first direction X, but the present disclosure is not limited thereto. In other embodiments, the plurality of photovoltaic modules 100 may also be arranged in the second direction Y, or arranged in an array in the first direction X and the second direction Y.

It should be noted that the first junction box 71 and the second junction box 72 offset toward the frame 150 may be disposed at other positions. For example, the first and

second junction boxes

71 and 72 may be closer to the frame 150 than all the first and second battery cells, respectively, in the second direction Y. For example, the first and

second junction boxes

71 and 72 may at least partially overlap the first and second cell strings 111 and 121, respectively, adjacent to the bezel 150 in a direction substantially perpendicular to the arrangement plane in which the cells of the photovoltaic assembly 100 lie. For example, the first and

second junction boxes

71 and 72 may be closer to the frame 150 than all the first and second battery cells, respectively, in the first direction X.

Other configurations of the photovoltaic assembly 100 are described below in exemplary embodiments, but the disclosure is not limited thereto.

Fig. 5 shows a circuit schematic of a photovoltaic module 100 according to a second embodiment of the present disclosure.

The same description as for the photovoltaic module 100 according to the first embodiment as shown in fig. 2 to 4 may be applied equally or similarly to the corresponding components in the photovoltaic module 100 according to the second embodiment as shown in fig. 5, and for the sake of brevity, the description is omitted here.

As shown in fig. 5, the photovoltaic module 100 includes a first battery cell 110, a second battery cell 120, and a third battery cell 130 connected in series between the first battery cell 110 and the second battery cell 120. The first battery unit 110 includes a plurality of first battery cells arranged in an array, which are electrically connected to form a plurality of first battery strings 111 connected in parallel. The second battery unit 120 includes a plurality of second battery cells arranged in an array, which are electrically connected to form a plurality of second battery strings 121 connected in parallel. The third battery unit 130 includes a plurality of third battery cells arranged in an array, which are electrically connected to form a plurality of third battery strings 131 connected in parallel. Furthermore, the photovoltaic module 100 further comprises a first junction box 71, a second junction box 72 and a third junction box 73. The first junction box 71 includes a first diode 711 connected in parallel with the first battery string 111 and a first cable connector 712 connecting negative terminals of the plurality of first battery strings 111 to the cable 80, the second junction box 72 includes a second diode 721 connected in parallel with the second battery string 121 and a second cable connector 722 connecting positive terminals of the plurality of second battery strings 121 to the cable 80, and the third junction box 73 includes a third diode 731 connected in parallel with the third battery string 131. The first junction box 71 is closer to a first cell adjacent to the upper side frame 150 than other first cells in the first direction X, and the second junction box 72 is closer to a second cell adjacent to the lower side frame 150 than other second cells in the first direction X.

Unlike the photovoltaic module 100 according to the first embodiment, in the present embodiment, the first junction box 71 is between the first cell string 111 adjacent to the left side frame 150 and the left side frame 150 in the second direction Y, that is, the first junction box 71 is closer to the frame 150 of the photovoltaic module 100 than all the first cells in the second direction Y; the second junction box 72 is located between the second cell string 121 adjacent to the right side frame 150 and the right side frame 150 in the second direction Y, that is, the second junction box 72 is closer to the frame 150 of the photovoltaic module 100 than all the second cells in the second direction Y.

Fig. 6 shows a circuit schematic of a photovoltaic module 100 according to a third embodiment of the present disclosure.

The same description as for the photovoltaic module 100 according to the first embodiment as shown in fig. 2 to 4 may be applied to the corresponding components in the photovoltaic module 100 according to the third embodiment as shown in fig. 6, or the like, and for the sake of brevity, the description is omitted here.

As shown in fig. 6, the photovoltaic module 100 includes a first battery cell 110, a second battery cell 120, and a third battery cell 130 connected in series between the first battery cell 110 and the second battery cell 120. The first battery unit 110 includes a plurality of first battery cells arranged in an array, which are electrically connected to form a plurality of first battery strings 111 connected in parallel. The second battery unit 120 includes a plurality of second battery cells arranged in an array, which are electrically connected to form a plurality of second battery strings 121 connected in parallel. The third battery unit 130 includes a plurality of third battery cells arranged in an array, which are electrically connected to form a plurality of third battery strings 131 connected in parallel. Furthermore, the photovoltaic module 100 further comprises a first junction box 71, a second junction box 72 and a third junction box 73. The first junction box 71 includes a first diode 711 connected in parallel with the first battery string 111 and a first cable connector 712 connecting negative terminals of the plurality of first battery strings 111 to the cable 80, the second junction box 72 includes a second diode 721 connected in parallel with the second battery string 121 and a second cable connector 722 connecting positive terminals of the plurality of second battery strings 121 to the cable 80, and the third junction box 73 includes a third diode 731 connected in parallel with the third battery string 131. The first junction box 71 is closer to a first cell adjacent to the upper side frame 150 than other first cells in the first direction X, and the second junction box 72 is closer to a second cell adjacent to the lower side frame 150 than other second cells in the first direction X.

Unlike the photovoltaic module 100 according to the first embodiment, in the present embodiment, the first junction box 71 is between the second first cell string 111 and the third first cell string 111 from the left side frame 150 in the second direction Y; the second junction box 72 is arranged between the second battery string 121 and the third second battery string 121 of the left side frame 150 in the second direction Y.

Fig. 7 shows a circuit schematic of a photovoltaic module 100 according to a fourth embodiment of the present disclosure, and fig. 8 shows a plan view schematic of a plurality of the photovoltaic modules 100 shown in fig. 7 viewed from a backlight side of the photovoltaic module 100.

The same description as for the photovoltaic module 100 according to the first embodiment as shown in fig. 2 to 4 may be applied to corresponding components in the photovoltaic module 100 according to the fourth embodiment as shown in fig. 7 and 8, and for the sake of brevity, the description is omitted here.

As shown in fig. 7, the photovoltaic module 100 includes a first battery cell 110, a second battery cell 120, and a third battery cell 130 connected in series between the first battery cell 110 and the second battery cell 120. The first battery unit 110 includes a plurality of first battery cells arranged in an array, which are electrically connected to form a plurality of first battery strings 111 connected in parallel. The second battery unit 120 includes a plurality of second battery cells arranged in an array, which are electrically connected to form a plurality of second battery strings 121 connected in parallel. The third battery unit 130 includes a plurality of third battery cells arranged in an array, which are electrically connected to form a plurality of third battery strings 131 connected in parallel. Furthermore, the photovoltaic module 100 further comprises a first junction box 71, a second junction box 72 and a third junction box 73. The first junction box 71 includes a first diode 711 connected in parallel with the first battery string 111 and a first cable connector 712 connecting negative terminals of the plurality of first battery strings 111 to the cable 80, the second junction box 72 includes a second diode 721 connected in parallel with the second battery string 121 and a second cable connector 722 connecting positive terminals of the plurality of second battery strings 121 to the cable 80, and the third junction box 73 includes a third diode 731 connected in parallel with the third battery string 131. The first junction box 71 is closer to a first cell adjacent to the upper side frame 150 than other first cells in the first direction X, and the second junction box 72 is closer to a second cell adjacent to the lower side frame 150 than other second cells in the first direction X.

Unlike the photovoltaic assembly 100 according to the first embodiment, in the present embodiment, the photovoltaic assembly 100 further includes a fourth cell 140 (i.e., an intermediate cell 140) and a fourth junction box 74 (i.e., a non-end junction box 74; schematically shown in dashed lines in fig. 7) coupled in series between the third cell 130 and the second cell 120. The fourth battery unit 140 includes a plurality of fourth battery cells arranged in an array, which are electrically connected to form a plurality of fourth battery strings 141 connected in parallel. The fourth junction box 74 includes a fourth diode 741 connected in parallel with the fourth battery string 141. The fourth junction box 74 is positioned at the center of the array of the plurality of third battery cells in the first direction X and the second direction Y.

Fig. 8 shows that such 3 photovoltaic modules 100 are connected to each other in the first direction X. As shown in fig. 8, the first junction box 71 of the photovoltaic module 100 at one end (left side end) is connected to the second junction box 72 of the photovoltaic module 100 at the middle by a cable 80, and the second junction box 72 of the photovoltaic module 100 at the other end (right side end) is connected to the first junction box 71 of the photovoltaic module 100 at the middle by a cable 80.

Fig. 9 shows a schematic circuit diagram of a photovoltaic module 100 according to a fifth embodiment of the present disclosure.

The same description as that of the photovoltaic module 100 according to the fourth embodiment shown in fig. 7 and 8 can be applied to the corresponding components in the photovoltaic module 100 according to the fifth embodiment shown in fig. 9, and for the sake of brevity, the description is omitted here.

As shown in fig. 9, the photovoltaic module 100 includes a first battery cell 110, a second battery cell 120, and a third battery cell 130 and a fourth battery cell 140 connected in series between the first battery cell 110 and the second battery cell 120. The first battery unit 110 includes a plurality of first battery cells arranged in an array, which are electrically connected to form a plurality of first battery strings 111 connected in parallel. The second battery unit 120 includes a plurality of second battery cells arranged in an array, which are electrically connected to form a plurality of second battery strings 121 connected in parallel. The third battery unit 130 includes a plurality of third battery cells arranged in an array, which are electrically connected to form a plurality of third battery strings 131 connected in parallel. The fourth battery unit 140 includes a plurality of fourth battery cells arranged in an array, which are electrically connected to form a plurality of fourth battery strings 141 connected in parallel. Furthermore, the photovoltaic module 100 further includes a first junction box 71, a second junction box 72, a third junction box 73, and a fourth junction box 74. The first junction box 71 includes a first diode 711 connected in parallel with the first battery string 111 and a first cable connector 712 connecting negative terminals of the plurality of first battery strings 111 to the cable 80, the second junction box 72 includes a second diode 721 connected in parallel with the second battery string 121 and a second cable connector 722 connecting positive terminals of the plurality of second battery strings 121 to the cable 80, the third junction box 73 includes a third diode 731 connected in parallel with the third battery string 131, and the fourth junction box 74 includes a fourth diode 741 connected in parallel with the fourth battery string 141. The first junction box 71 is closer to a first cell adjacent to the upper side frame 150 than other first cells in the first direction X, and the second junction box 72 is closer to a second cell adjacent to the lower side frame 150 than other second cells in the first direction X.

Unlike the photovoltaic module 100 according to the fourth embodiment, in the present embodiment, the first junction box 71 is between the first cell string 111 adjacent to the left side frame 150 and the left side frame 150 in the second direction Y; the second junction box 72 is between the second battery string 121 adjacent to the right side frame 150 and the right side frame 150 in the second direction Y.

Fig. 10 shows a schematic circuit diagram of a photovoltaic module 100 according to a sixth embodiment of the present disclosure.

The same description as that of the photovoltaic module 100 according to the fourth embodiment shown in fig. 7 and 8 may be applied to the corresponding components in the photovoltaic module 100 according to the sixth embodiment shown in fig. 10, or the like, and for the sake of brevity, the description thereof is omitted.

As shown in fig. 10, the photovoltaic module 100 includes a first battery cell 110, a second battery cell 120, and a third battery cell 130 and a fourth battery cell 140 connected in series between the first battery cell 110 and the second battery cell 120. The first battery unit 110 includes a plurality of first battery cells arranged in an array, which are electrically connected to form a plurality of first battery strings 111 connected in parallel. The second battery unit 120 includes a plurality of second battery cells arranged in an array, which are electrically connected to form a plurality of second battery strings 121 connected in parallel. The third battery unit 130 includes a plurality of third battery cells arranged in an array, which are electrically connected to form a plurality of third battery strings 131 connected in parallel. The fourth battery unit 140 includes a plurality of fourth battery cells arranged in an array, which are electrically connected to form a plurality of fourth battery strings 141 connected in parallel. Furthermore, the photovoltaic module 100 further includes a first junction box 71, a second junction box 72, a third junction box 73, and a fourth junction box 74. The first junction box 71 includes a first diode 711 connected in parallel with the first battery string 111 and a first cable connector 712 connecting negative terminals of the plurality of first battery strings 111 to the cable 80, the second junction box 72 includes a second diode 721 connected in parallel with the second battery string 121 and a second cable connector 722 connecting positive terminals of the plurality of second battery strings 121 to the cable 80, the third junction box 73 includes a third diode 731 connected in parallel with the third battery string 131, and the fourth junction box 74 includes a fourth diode 741 connected in parallel with the fourth battery string 141. The first junction box 71 is closer to a first cell adjacent to the upper side frame 150 than other first cells in the first direction X, and the second junction box 72 is closer to a second cell adjacent to the lower side frame 150 than other second cells in the first direction X.

Unlike the photovoltaic module 100 according to the fourth embodiment, in the present embodiment, the first junction box 71 is between the second first cell string 111 and the third first cell string 111 from the left side frame 150 in the second direction Y; the second junction box 72 is arranged between the second battery string 121 and the third second battery string 121 of the left side frame 150 in the second direction Y.

The scope of the present disclosure is not defined by the above-described embodiments but is defined by the appended claims and equivalents thereof.

Claims

1. A photovoltaic assembly (100) comprising:

one or more battery cells (110, 120, 130, 140), each of the battery cells (110, 120, 130, 140) including a plurality of battery pieces arranged in an array in a first direction and in a second direction substantially perpendicular to the first direction, and electrically connected to form a plurality of battery strings (111, 121, 131, 141) having the battery pieces connected in series,

an end junction box (71, 72) including diodes (711, 721) and cable joints (712, 722), the diodes (711, 721) being connected in parallel with the battery strings (111, 121) of the respective battery cells (110, 120), the cable joints (712, 722) being for connecting the battery strings (111, 121) in the battery cells (110, 120) to a cable (80), and

a bezel (150) disposed at a periphery of the one or more battery cells (110, 120, 130, 140);

wherein the end junction box (71, 72) is offset toward the bezel in both the first direction and the second direction relative to a center of the array of the plurality of battery cells of the respective battery cell (110, 120).

2. The photovoltaic module (100) of claim 1,

the plurality of battery strings (111, 121, 131, 141) are connected in parallel.

3. The photovoltaic module (100) of claim 1,

the plurality of battery pieces of the battery string (111, 121, 131, 141) are arranged in a first direction.

4. The photovoltaic module (100) of claim 3,

the end junction box (71, 72) is closer to the cell sheet adjacent to the bezel (150) than the other cell sheets in the respective cell unit (110, 120) in the first direction.

5. The photovoltaic module (100) of claim 3,

the end junction box (71, 72) is closer to the cell sheet adjacent to the bezel (150) than the other cell sheets in the respective cell unit (110, 120) in the second direction.

6. The photovoltaic module (100) of claim 5,

the end junction box (71, 72) is closer to the bezel (150) than all of the cells of the respective battery unit (110, 120) in the second direction.

7. The photovoltaic module (100) of claim 1,

the one or more battery cells (110, 120, 130, 140) comprising two end battery cells (110, 120) located at both ends of the photovoltaic assembly in the first direction and at least one middle battery cell (130, 140) between the two end battery cells,

the photovoltaic assembly further comprises a non-terminal junction box (73, 74), the non-terminal junction box (73, 74) comprising diodes (731, 741), the diodes (731, 741) being connected in parallel with the battery strings (131, 141) of the respective intermediate battery cells (130, 140).

8. The photovoltaic module (100) of claim 7,

the non-end junction boxes (73, 74) are positioned in the first and second directions at the center of the array of battery slices of the respective intermediate battery cells (130, 140).

9. The photovoltaic module (100) of claim 1,

the end junction box (71, 72) is offset from the bezel in the first direction or in the second direction with respect to a center line of the array of the plurality of battery cells of the corresponding battery unit (110, 120) by more than 0.1%, such as more than 1%, such as more than 10%, such as more than 20%, such as more than 30%, such as more than 40%, such as 0.1-30%, such as 10-40%, such as about 50%, such as 10-30%, such as 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 2.0%, 3.0%, 4.0%, 5.0%, 6.0%, 7.0%, 8.0%, 9.0%, 10%, 13%, 15%, 18%, 20%, 21%, 23%, 25%, 28%, toward the length of the bezel in the first direction or in the second direction, 30%, 33%, 35%, 38%, 40%, 43%, 45%, 48%, approximately 50% (adjacent to the bezel), etc.