CN214898472U

CN214898472U - Photovoltaic module

Info

Publication number: CN214898472U
Application number: CN202120852895.7U
Authority: CN
Inventors: 许涛; 邓士锋
Original assignee: CSI Cells Co Ltd; Canadian Solar Manufacturing Changshu Inc
Current assignee: CSI Cells Co Ltd; Canadian Solar Manufacturing Changshu Inc; CSI Solar Technologies Inc
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-11-26
Anticipated expiration: 2031-04-23

Abstract

The utility model discloses a photovoltaic module, photovoltaic module includes: the photovoltaic body comprises a photovoltaic cell layer, the photovoltaic cell layer comprises a plurality of cell unit groups, the cell unit groups are connected in series and are sequentially arranged along a string arrangement direction, each cell unit group comprises at least one cell unit, each cell unit comprises at least one cell string, and each cell string comprises a plurality of cell sheets which are connected in series and are arranged along a string extension direction perpendicular to the string arrangement direction; a plurality of bypass members, each bypass member being connected in anti-parallel with a cell of a corresponding cell group, at least one of the plurality of bypass members being provided within the photovoltaic body. According to the utility model discloses a photovoltaic module, bypass spare can receive the shadow when sheltering from and realize the bypass function, avoids producing the hot spot effect at a plurality of battery pieces, and at least one in a plurality of bypass spares can keep apart with external environment to can reduce external environment for example steam to the influence of bypass spare, guarantee photovoltaic module's long-term reliability.

Description

Photovoltaic module

Technical Field

The utility model belongs to the technical field of photovoltaic manufacturing technology and specifically relates to a photovoltaic module is related to.

Background

In the related art, under the background of increasingly serious energy crisis and environmental pollution, photovoltaic power generation is increasingly favored by governments of various countries as a green and environment-friendly renewable energy source. The photovoltaic module is a core part of a photovoltaic power generation system. In the long-term operation process of the photovoltaic module, the bypass diode is easily influenced by external environments such as water vapor and the like, and the long-term reliability of the photovoltaic module is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a photovoltaic module, photovoltaic module's bypass spare can be kept apart with external environment to can improve photovoltaic module's long-term reliability.

According to the utility model discloses photovoltaic module, include: the photovoltaic body comprises a photovoltaic cell layer, the photovoltaic cell layer comprises a plurality of cell unit groups, the cell unit groups are connected in series and are sequentially arranged along a string arrangement direction, each cell unit group comprises at least one cell unit, each cell unit comprises at least one cell string, and each cell string comprises a plurality of cell sheets which are connected in series and are arranged along a string extension direction perpendicular to the string arrangement direction; a plurality of bypass elements, each bypass element being connected in anti-parallel with the cells of a corresponding cell stack, at least one of the plurality of bypass elements being provided within the photovoltaic body.

According to the photovoltaic module provided by the embodiment of the utility model, each bypass component is reversely connected in parallel with the battery unit of the corresponding battery unit group, and at least one of the plurality of bypass components is arranged in the photovoltaic body, on one hand, the plurality of bypass components can realize the bypass function when the plurality of battery pieces of the battery unit group are shielded by the shadow, thereby avoiding generating the hot spot effect; on the other hand, at least one of the plurality of bypass members can be isolated from the external environment, so that the influence of the external environment such as water vapor on the bypass member can be reduced, and the long-term reliability of the photovoltaic module is ensured.

According to some embodiments of the invention, the at least one of the plurality of by-pass pieces is located in the same plane as the photovoltaic cell layer.

According to some embodiments of the invention, the photovoltaic module follows at least one of the middle parts of the string arrangement direction the bypass member is established within the photovoltaic body.

According to some embodiments of the invention, the photovoltaic module further comprises: at least one junction box, the quantity of the junction box is less than the quantity of the battery cell group.

According to some embodiments of the present invention, the at least one bypass member of the photovoltaic module located on both sides of the string arrangement direction is provided in the photovoltaic body.

According to some embodiments of the invention, there are the bypass member all established within the photovoltaic body.

According to some embodiments of the present invention, each of the cell stacks comprises a plurality of the battery cells, at least one of the bypass members is provided between two adjacent ones of the battery cells.

According to some embodiments of the invention, the minimum distance between two adjacent battery cells of the battery cell group is d₁Wherein d is₁Satisfies the following conditions: d is not less than 10mm₁≤26mm。

According to some embodiments of the invention, d₁Further satisfies the following conditions: d is not less than 10mm₁≤16mm。

According to some embodiments of the invention, the bypass is a bypass diode or a MOS transistor.

According to some embodiments of the present invention, each of the cell groups includes a plurality of the cells, a plurality of the cells are arranged along the string extending direction, the photovoltaic module further includes: at least one junction box, at least one junction box is arranged between two adjacent cell groups of the corresponding cell groupBetween the battery cells, the terminal box has a width W in the string extending direction₁Wherein, the W₁Satisfies the following conditions: w is not less than 6mm₁≤26mm。

According to some embodiments of the invention, the W₁Further satisfies the following conditions: w is not less than 6mm₁≤15mm。

According to some embodiments of the invention, the width of the photovoltaic module is W₂The length of the photovoltaic component is L₁Wherein, the W₂、L₁Satisfies the following conditions: l is more than or equal to 1.8₁/W₂≤2.7。

According to some embodiments of the invention, the width of the photovoltaic module is W₂The length of the photovoltaic component is L₁Wherein, the W₂、L₁Respectively satisfy: w is not more than 1040mm₂≤1500mm，1910mm≤L₁≤2720mm。

According to some embodiments of the present invention, the string arrangement direction, two adjacent minimum distances between the battery strings are d₂Wherein d is₂Satisfies the following conditions: d is not less than 1mm₂≤3mm。

According to some embodiments of the invention, the photovoltaic cell layer has two first edges opposite to each other along the string extension direction and two second edges opposite to each other along the string arrangement direction; the photovoltaic module further includes: a front cover plate disposed on the front side of the photovoltaic cell layer, the distance between the first edge and the corresponding edge of the front cover plate being d₃The distance between the second edge and the corresponding edge of the front cover plate is d₄Wherein d is₃、d₄Respectively satisfy: d is not less than 15mm₃≤24mm，8.5mm≤d₄Less than or equal to 17 mm; the back cover plate is arranged on the back of the photovoltaic cell layer.

According to some embodiments of the present invention, the distance between two adjacent sides of each of the battery strings is d₅Wherein d is₅Satisfies the following conditions: less than or equal to-1 mmd₅≤2.5mm。

According to some embodiments of the invention, each of the battery pieces has a length of L₂Wherein, said L₂Satisfies the following conditions: l is more than or equal to 156mm₂≤240mm。

According to some embodiments of the invention, the L₂Further satisfies the following conditions: l is more than or equal to 182mm₂≤240mm。

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

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

fig. 1 is a schematic front structural view of a photovoltaic module according to an embodiment of the present invention;

FIG. 2 is a schematic electrical circuit diagram of the photovoltaic module shown in FIG. 1;

fig. 3 is a schematic back structural view of a photovoltaic module according to an embodiment of the present invention;

fig. 4 is a schematic circuit diagram of the photovoltaic module shown in fig. 3.

Reference numerals:

100: a photovoltaic module;

1: a battery cell stack; 11: a battery cell; 111: a battery string;

1111: a battery piece; 2: a bypass member; 3: a junction box.

Detailed Description

Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.

A photovoltaic module 100 according to an embodiment of the present invention is described below with reference to fig. 1-4.

As shown in fig. 2 and 4, a photovoltaic module 100 according to an embodiment of the present invention includes a photovoltaic body and a plurality of bypass members 2. In the description of the present invention, "a plurality" means two or more.

The photovoltaic body comprises a photovoltaic cell layer, the photovoltaic cell layer comprises a plurality of cell unit groups 1, the cell unit groups 1 are connected in series and are sequentially arranged along a serial arrangement direction, and each cell unit group 1 comprises at least one cell unit 11. Wherein the plurality of cell groups 1 may each include one battery cell 11; alternatively, each of the plurality of battery cell groups 1 includes a plurality of battery cells 11; it is also possible that a part of the plurality of cell stacks 1 includes one battery cell 11 and another part of the plurality of cell stacks 1 includes a plurality of battery cells 11.

The battery unit 11 includes at least one battery string 111. For example, when there is one battery cell 11, the battery cell 11 may include one or more battery strings 111. When the battery unit 11 is plural, the plural battery units 11 may each include one battery string 111; alternatively, the plurality of battery cells 11 may each include a plurality of battery strings 111; of course, it is also possible that one part of the plurality of battery cells 11 includes one battery string 111, and another part of the plurality of battery cells 11 includes a plurality of battery strings 111.

The cell string 111 includes a plurality of cell pieces 1111 connected in series and arranged in a string extending direction perpendicular to the string arrangement direction. Here, it should be noted that the "string extending direction" may be understood as an arrangement direction of the plurality of battery pieces 1111 in the battery string 111 (for example, an up-down direction in fig. 1 to 4), and the "string arrangement direction" may be a direction perpendicular to the arrangement direction of the plurality of battery pieces 1111 in the battery string 111 (for example, a left-right direction in fig. 1 to 4).

For example, three cell stacks 1 are shown in the example of fig. 1 to 4, the three cell stacks 1 being arranged in sequence along the short side (i.e., the string arrangement direction) of the photovoltaic module 100, each cell stack 1 including two cells 11 connected in parallel and arranged along the long side (i.e., the string extension direction) of the photovoltaic module 100. The plurality of cells 1111 in each cell string 111 may extend linearly along the long side of the photovoltaic module 100. Therefore, the circuit of the photovoltaic module 100 is simple in design and convenient to process.

Three cell stacks 1 are shown in fig. 1-4 for illustrative purposes, but it is obvious to those skilled in the art after reading the technical solutions of the present application that the solution can be applied to other cell stacks 1, and this also falls within the protection scope of the present invention.

Each bypass member 2 is connected in anti-parallel with the battery cell 11 of the corresponding battery cell stack 1. It should be noted that a plurality of bypass members 2 may correspond to a plurality of cell stacks 1 one to one (as shown in fig. 4), in which case all the battery slices 1111 of each cell stack 1 are protected by one bypass member 2; alternatively, the number of the bypass members 2 may be greater than the number of the cell stacks 1 (not shown), in which case at least one cell stack 1 may correspond to a plurality of bypass members 2. Of course, the number of the bypass members 2 may also be smaller than the number of the battery cell groups 1, and it is understood that the number of the bypass members 2 may be specifically set according to actual requirements to better meet practical applications. Alternatively, the bypass element 2 may be a bypass diode or a MOS Transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, or Metal-Oxide-Semiconductor Field-Effect Transistor for short). But is not limited thereto.

At least one of the plurality of bypass members 2 is provided within the photovoltaic body. For example, the above-mentioned at least one of the plurality of bypass members 2 may be laminated within the photovoltaic body. From this, at least one bypass spare 2 can be kept apart with external environment, can effectively reduce external environment such as steam to the influence of bypass spare 2 to can effectively prolong bypass spare 2's life, improve photovoltaic module 100's long-term reliability.

According to the photovoltaic module 100 of the embodiment of the present invention, each bypass element 2 is connected in parallel with the corresponding battery unit 11 of the battery unit group 1 in an opposite direction, and at least one of the plurality of bypass elements 2 is disposed in the photovoltaic body, on one hand, the plurality of bypass elements 2 can realize a bypass function when the plurality of battery slices 1111 of the battery unit group 1 are shielded by a shadow, thereby avoiding a hot spot effect; on the other hand, at least one of the plurality of bypass members 2 may be isolated from the external environment, so that the influence of the external environment, such as moisture, on the bypass members 2 may be reduced, and the long-term reliability of the photovoltaic module 100 may be ensured.

In some embodiments of the present invention, in conjunction with fig. 1 and 2, the at least one of the plurality of bypass members 2 is in the same plane as the photovoltaic cell layer. For example, when the above-mentioned at least one of the plurality of bypass members 2 is laminated within the photovoltaic body, the bypass member 2 may be in the same layer as the photovoltaic cell string 111. When the photovoltaic module 100 is manufactured, the front cover plate, the front encapsulation adhesive film, the bypass member 2, the photovoltaic cell layer, the back encapsulation adhesive film and the back cover plate can be sequentially placed to complete preparation work before lamination of the photovoltaic module 100. And then, after vacuumizing and heating lamination is carried out on the laminated five-layer structure comprising the front cover plate, the front packaging adhesive film, the bypass part 2, the photovoltaic cell layer, the back packaging adhesive film and the back cover plate, the front packaging adhesive film and the back packaging adhesive film are crosslinked and cured to protect the bypass part 2 and the photovoltaic cell layer, finally firm bonding of the five-layer structure (namely the front cover plate, the front packaging adhesive film, the bypass part 2, the photovoltaic cell layer, the back packaging adhesive film and the back cover plate) is realized, and the photovoltaic module 100 is manufactured by additionally arranging a frame, a junction box 3 and sealing by adopting silica gel. Alternatively, the front side encapsulant film may be a transparent EVA (ethylene-vinyl acetate copolymer) film, POE (polyofin Elastomer ethylene-propylene copolymer) film, EPE (Expandable Polyethylene) film, or the like. The back packaging adhesive film can be a transparent EVA film, a white EVA film, a POE film or an EPE film and the like.

Therefore, through the arrangement, the two sides of the thickness direction of the at least one of the bypass members 2 can be provided with the packaging adhesive films, so that the at least one of the bypass members 2 can be effectively separated from the external environment, the influence of water vapor and the external environment on the at least one of the bypass members 2 can be effectively reduced, and the reliability of the photovoltaic module 100 can be further ensured. Of course, the above-mentioned at least one of the plurality of bypass members 2 may also be laminated in other layers of the photovoltaic body, such as an encapsulating adhesive film layer or the like. The front surface refers to a main light-receiving surface of the cell 1111, that is, a surface of the cell 1111 or the photovoltaic module 100 directly receiving sunlight, and the back surface is a surface opposite to the front surface.

In some embodiments of the present invention, as shown in fig. 1 and 2, at least one bypass member 2 at the middle of the photovoltaic module 100 in the string arrangement direction is provided in the photovoltaic body. Herein, the "middle portion" should be broadly understood in the present application, and the "bypass member 2 at the middle portion of the photovoltaic module 100 in the string arrangement direction" may be understood as a bypass member 2 located between the bypass members 2 at both sides of the photovoltaic module 100 in the string arrangement direction. For example, when there is one bypass member 2 in the middle of the photovoltaic module 100 in the string arrangement direction, the bypass member 2 in the middle of the photovoltaic module 100 in the string arrangement direction is disposed in the photovoltaic body at this time; when the photovoltaic module 100 has a plurality of bypass members 2 in the middle in the string arrangement direction, at least one of the plurality of bypass members 2 in the middle in the string arrangement direction of the photovoltaic module 100 is provided in the photovoltaic body.

Therefore, by arranging the at least one bypass component 2 in the middle in the photovoltaic module 100, on one hand, the influence of an external environment such as water vapor on the at least one bypass component 2 can be reduced, so that the at least one bypass component 2 can have better performance, and the cell 1111 of the corresponding cell unit group 1 can be effectively protected from hot spots, and the cell 1111 is prevented from generating a hot spot effect; on the other hand, above-mentioned at least one bypass spare 2 can need not to be located terminal box 3 to make photovoltaic module 100 and above-mentioned at least one bypass spare 2 correspond position department can need not to punch, thereby can avoid photovoltaic module 100 to wet, promote photovoltaic module 100's waterproof performance, avoid photovoltaic module 100 to receive the influence at long-term operation in-process power, effectively improve photovoltaic module 100's long-term reliability.

In some embodiments of the present invention, referring to fig. 3, photovoltaic module 100 further comprises: at least one terminal box 3, the number of terminal boxes 3 being smaller than the number of cell stacks 1. For example, three bypass members 2 and two terminal blocks 3 are shown in the example of fig. 1-4. The three bypass elements 2 correspond to the three battery cell groups 1 one by one, the three bypass elements 2 are respectively a first bypass element, a second bypass element and a third bypass element, and the second bypass element is arranged between the first bypass element and the third bypass element. Wherein the second bypass element can be laminated in the photovoltaic body and the first and third bypass elements can be located in the two junction boxes 3, respectively. Thus, by making the number of terminal blocks 3 smaller than the number of cell groups 1, the number of terminal blocks 3 can be reduced, so that cost can be effectively reduced. Moreover, perforation can be avoided at the cell unit group 1 without the junction box 3, thereby effectively avoiding water vapor from entering the photovoltaic module 100, avoiding the problems of power attenuation and power generation reduction caused by the influence of the external environment and the like on the photovoltaic module 100, and further improving the long-term reliability of the photovoltaic module 100.

In some embodiments of the present invention, at least one bypass member 2 of the photovoltaic module 100 located on both sides of the string arrangement direction is provided in the photovoltaic body. Therefore, when the same cell unit group 1 of the photovoltaic module 100 positioned at two sides of the serial arrangement direction corresponds to the plurality of bypass pieces 2 and one part of the plurality of bypass pieces 2 is arranged in the photovoltaic body, the bypass pieces 2 laminated in the photovoltaic module 100 can be prevented from being influenced by water vapor, so that the reliability of the photovoltaic module 100 can be improved, the other part of the plurality of bypass pieces 2 can be positioned in the junction box 3, the size of the junction box 3 can be relatively smaller while the maintenance and the replacement are convenient, so that the arrangement of the junction box 3 is more convenient, and the cost can be reduced; when the bypass part 2 corresponding to the same cell unit group 1 on both sides of the string arrangement direction of the photovoltaic module 100 is arranged in the photovoltaic body, the bypass part 2 can be isolated from the external environment, thereby effectively avoiding the influence of water vapor, and only metal wires need to be arranged in the junction box 3 of the corresponding end part of the photovoltaic module 100 in the string arrangement direction so as to lead out the positive and negative electrodes, the size of the junction box 3 can be further reduced, when the photovoltaic module 100 is a double-glass module, the battery piece 1111 can be prevented from being shielded, and the output power of the photovoltaic module 100 is effectively improved.

In some embodiments of the present invention, all the bypass members 2 may be disposed in the photovoltaic body. So set up, whole photovoltaic module 100 only needs to set up two terminal boxes 3 in order to draw forth positive negative pole, and can need not to set up bypass spare 2 in the terminal box 3 to can effectively reduce the size of terminal box 3, when photovoltaic module 100 is dual glass assembly, can avoid causing the shelter from to battery piece 1111, thereby effectively promote photovoltaic module 100's wholeness ability. Moreover, when the battery cell group 1 includes a plurality of battery cells 11, the minimum distance between two adjacent battery cells 11 may be smaller, so that the arrangement of the plurality of battery sheets 1111 may be more compact, and the power generation efficiency per unit area of the photovoltaic module 100 may be improved.

In some embodiments of the present invention, referring to fig. 2 and 4, each battery cell group 1 may include a plurality of battery cells 11, and at least one bypass member 2 is disposed between two adjacent battery cells 11 of the corresponding battery cell group 1. That is, a plurality of bypass members 2 may be each provided between two adjacent battery cells 11 of the corresponding cell group 1; it is also possible that a part of the plurality of bypass members 2 is provided between the adjacent two battery cells 11 of the corresponding battery cell group 1. The number of the battery slices 1111 of each battery unit 11 may be 16 to 32 (inclusive). Therefore, the arrangement of the bypass component 2 is reasonable, the distance between the edge of the cell 1111 and the edge of the glass can be reduced, and the reliability of the photovoltaic module 100 is improved.

In some optional embodiments of the present invention, the minimum distance between two adjacent battery cells 11 of the battery cell group 1 is d₁Wherein d is₁Satisfies the following conditions: d is not less than 10mm₁Less than or equal to 26 mm. Specifically, for example, when d₁When the distance between two adjacent battery units 11 of the battery unit group 1 is too small, the minimum distance is too small, so that the junction box 3 may cover the edge of the battery piece 1111, and when the photovoltaic module 100 is a double-glass module, the light receiving area of the battery piece 1111 is reduced, and the output power of the photovoltaic module 100 is affected; when d is₁At > 26mm, the minimum distance between two adjacent battery cells 11 of the battery cell group 1 is too large, which may also reduce the output power of the photovoltaic module 100. Thereby, by making d₁Satisfies the following conditions: d is not less than 10mm₁Less than or equal to 26mm, the minimum distance between two adjacent battery units 11 of the battery unit group 1 is reasonable, and the output power of the photovoltaic module 100 can be effectively improved.

Further optionally, d₁Further, the following conditions can be satisfied: d is not less than 10mm₁Less than or equal to 16 mm. For example, when all of the bypass members 2 are laminated within the photovoltaic module 100The bypass member 2 may not be required to be disposed in the junction box 3, and the size of the junction box 3 may be relatively small, so that the minimum distance between two adjacent battery cells 11 of the same cell group 1 of the photovoltaic module 100, such as a dual-glass module, may be relatively small. Thus, by making d 10 mm. ltoreq.d₁16mm is less than or equal to, when avoiding that terminal box 3 shelters from the battery piece 1111 of adjacent battery unit 11, make arranging of a plurality of battery pieces 1111 can be compacter to can effectively improve photovoltaic module 100 unit area's generating efficiency.

In some optional embodiments of the present invention, referring to fig. 2 and 4, the plurality of battery cells 11 of each battery cell group 1 are arranged along the string extending direction, at least one junction box 3 is disposed between two adjacent battery cells 11 of the corresponding battery cell group 1, and the width of the junction box 3 in the string extending direction is W₁Wherein W is₁Satisfies the following conditions: w is not less than 6mm₁Less than or equal to 26 mm. In particular, for example, when at least one bypass element 2 is provided in the terminal box 3, the width W of the terminal box 3 provided with the bypass element 2₁Can further satisfy: w is more than or equal to 18mm₁26mm or less, for example W₁May be 25 mm; when all the bypass members 2 are laminated in the photovoltaic module 100, the bypass members 2 may not be required to be provided in the junction box 3, and the size of the junction box 3 may be relatively small, in which case W₁Can further satisfy: w is not less than 6mm₁Less than or equal to 15mm, can effectively avoid terminal box 3 to shelter from photovoltaic module 100 for example the battery piece 1111 of dual glass assembly, and arranging of a plurality of battery pieces 1111 can be compacter, can effectively improve photovoltaic module 100 for example dual glass assembly's output.

In some optional embodiments of the present disclosure, the width of the photovoltaic module 100 is W₂The length of the photovoltaic module 100 is L₁Wherein W is₂、L₁Satisfies the following conditions: l is more than or equal to 1.8₁/W₂Less than or equal to 2.7. Therefore, the ratio of the length to the width of the photovoltaic module 100 is reasonable, the occupied space is small, and the photovoltaic module can more conveniently pass through a container door when the size of the battery piece 1111 is large. Moreover, the photovoltaic module 100 is small in size and can be installed on a roof. Alternatively, W₂、L₁Can be respectively provided withSatisfies the following conditions: w is not more than 1040mm₂≤1500mm，1910mm≤L₁Less than or equal to 2720 mm. But is not limited thereto.

In some optional embodiments of the present invention, the minimum distance between two adjacent battery strings 111 along the string arrangement direction is d₂Wherein d is₂Satisfies the following conditions: d is not less than 1mm₂Less than or equal to 3 mm. For example, when d₂If the distance is less than 1mm, the minimum distance between two adjacent cell strings 111 is too small, and since the cell piece 1111 moves during the lamination process of the photovoltaic module 100, the sheet combination may occur; when d is₂At > 3mm, the minimum distance between two adjacent cell strings 111 is too large, and thus the power generation efficiency per unit area of the photovoltaic module 100 may be reduced. Thereby, by making d₂Satisfies the following conditions: d is not less than 1mm₂Less than or equal to 3mm, and can effectively improve the output power of the photovoltaic module 100 while avoiding the occurrence of sheet combination in the lamination process.

In some optional embodiments of the present invention, the photovoltaic cell layer has two first edges opposite to each other along the string extending direction and two second edges opposite to each other along the string arranging direction. The photovoltaic module 100 further comprises a front cover plate and a back cover plate, the front cover plate being arranged on the front side of the photovoltaic cell layer, the distance between the first edge and the corresponding edge of the front cover plate being d₃The distance between the second edge and the corresponding edge of the front cover plate is d₄Wherein d is₃、d₄Respectively satisfy: d is not less than 15mm₃≤24mm，8.5mm≤d₄Less than or equal to 17mm, and the back cover plate is arranged on the back of the photovoltaic cell layer. For example, in the example of fig. 1-4, the photovoltaic cell layer is formed as a rectangle, the upper and lower edges of the photovoltaic cell layer are first edges, and the left and right edges of the photovoltaic cell layer are second edges. Alternatively, the front cover plate may be glass, such as coated tempered glass, and the back cover plate may be a back plate, coated tempered glass, float glass, or the like.

Thereby, by making d₃、d₄Respectively satisfy: d is not less than 15mm₃≤24mm，8.5mm≤d₄Less than or equal to 17mm, the distances between the four edges of the photovoltaic cell layer and the corresponding edges of the front cover plate are reasonable, and the compactness of the cell 1111 is ensuredWhen the photovoltaic module is arranged, enough electric gaps are formed between the four edges of the photovoltaic cell layer and the corresponding edges of the front cover plate, so that the safety of the photovoltaic module 100 can be effectively ensured. The electrical gap is the shortest spatial distance measured between two conductive parts or between a conductive part and an equipment protection interface, namely, the shortest distance for insulation can be realized through air under the condition of ensuring the stability and safety of electrical performance.

In some optional embodiments of the present invention, the distance between two sides of two adjacent battery sheets 1111 of each battery string 111 adjacent to each other is d₅Wherein d is₅Satisfies the following conditions: d is less than or equal to-1 mm₅Less than or equal to 2.5 mm. For example, when-1 mm ≦ d₅When the width is less than 0mm, the end parts of two adjacent battery sheets 1111 are overlapped along the extending direction of the string, and the width of the overlapped part of the end parts of the two adjacent battery sheets 1111 is | d₅L (i.e., 0mm to 1 mm); when d is more than 0mm₅When the thickness is less than or equal to 2.5mm, two adjacent battery pieces 1111 are arranged at intervals, and the minimum distance between the two adjacent battery pieces 1111 is d₅(i.e., 0mm to 2.5 mm). Thereby, by making d₅Satisfies the following conditions: d is less than or equal to-1 mm₅2.5mm is less than or equal to, and the distance between two adjacent battery pieces 1111 is less to make photovoltaic module 100 of the same size can hold more quantity of battery pieces 1111, effectively improve photovoltaic module 100 unit area's photoelectric conversion efficiency, further improved photovoltaic module 100's output.

Optionally, each cell 11111111 has a length L₂Wherein L is₂Can satisfy the following conditions: l is more than or equal to 156mm₂Less than or equal to 240 mm. From this, the length of battery piece 1111 is great to can improve photovoltaic module 100's effective generating area, and then can improve photovoltaic module 100's conversion efficiency and output, effectively reduce the single cost of watt. Further optionally, L₂Further, the following conditions can be satisfied: l is more than or equal to 182mm₂Less than or equal to 240 mm. But is not limited thereto.

In some optional embodiments of the present invention, each cell 1111 may be one-half of a complete cell, the length extending direction of each cell 1111 is the string arrangement direction, and the width extending direction of each cell 1111 is the string extending direction. For example, the half-cell 1111 may be processed by laser scribing, and the entire photovoltaic module 100 may have a symmetrical structure. From this, compare in adopting complete battery piece, can reduce photovoltaic module 100's internal loss, and through adopting above-mentioned circuit connection mode, make every battery cluster 111 current reduce to adopting complete battery piece output current's half, and then through two battery unit 11 parallel connection, make photovoltaic module 100's output current still the same with output current when adopting complete battery piece, avoided the voltage reduction that causes because of adopting half battery piece 1111, simultaneously because half battery piece 1111 electric current reducible internal loss, thereby improved photovoltaic module 100's output power, help reducing the cost of single watt.

Of course, those skilled in the art will appreciate that the battery piece 1111 is not limited to being one-half of a complete battery piece, for example, the battery piece 1111 may also be one-third of a complete battery piece. So set up, while improving the output of photovoltaic module 100, also can reduce single cost of watt.

Other constructions and operations of the photovoltaic module 100 according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A photovoltaic module, comprising:

the photovoltaic body comprises a photovoltaic cell layer, the photovoltaic cell layer comprises a plurality of cell unit groups, the cell unit groups are connected in series and are sequentially arranged along a string arrangement direction, each cell unit group comprises at least one cell unit, each cell unit comprises at least one cell string, and each cell string comprises a plurality of cell sheets which are connected in series and are arranged along a string extension direction perpendicular to the string arrangement direction;

a plurality of bypass elements, each bypass element being connected in anti-parallel with the cells of a corresponding cell stack, at least one of the plurality of bypass elements being provided within the photovoltaic body.

2. The assembly according to claim 1, wherein the at least one of the plurality of bypass members is in the same plane as the photovoltaic cell layer.

3. The pv module according to claim 1 wherein at least one of the bypasses in a middle portion of the pv module in the string direction is provided in the pv body.

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

at least one junction box, the quantity of the junction box is less than the quantity of the battery cell group.

5. The pv module according to claim 1 wherein at least one bypass member of the pv module on either side of the string direction is disposed within the pv body.

6. The photovoltaic module of claim 1, wherein all of the bypass members are disposed within the photovoltaic body.

7. The pv module according to claim 1 wherein each cell group includes a plurality of the cells, and at least one bypass member is disposed between two adjacent cells of the corresponding cell group.

8. Photovoltaic module according to claim 7, characterized in that the minimum distance between two of said adjacent cells of said group of cells is d₁Wherein d is₁Satisfies the following conditions: d is not less than 10mm₁≤26mm。

9. The photovoltaic module of claim 8, wherein d is₁Further satisfies the following conditions: d is not less than 10mm₁≤16mm。

10. The photovoltaic module of any of claims 1-9 wherein the bypass is a bypass diode or a MOS transistor.

11. The photovoltaic module of any of claims 1-9, wherein each of the cell stacks comprises a plurality of the cells arranged along the string extension direction,

the photovoltaic module further includes:

at least one junction box, at least one said junction box is set up between two said battery units of said battery unit group that correspond, width in said cluster extension direction of said junction box is W₁Wherein, the W₁Satisfies the following conditions: w is not less than 6mm₁≤26mm。

12. The photovoltaic module of claim 11, wherein W is₁Further satisfies the following conditions: w is not less than 6mm₁≤15mm。

13. The photovoltaic module of any of claims 1-9, wherein the photovoltaic module has a width W₂The length of the photovoltaic component is L₁Wherein, the W₂、L₁Satisfies the following conditions: l is more than or equal to 1.8₁/W₂≤2.7。

14. The photovoltaic module of any of claims 1-9, wherein the photovoltaic module has a width W₂The length of the photovoltaic component is L₁Wherein, the W₂、L₁Respectively satisfy: w is not more than 1040mm₂≤1500mm，1910mm≤L₁≤2720mm。

15. According toThe photovoltaic module of any of claims 1-9, wherein the minimum distance between two adjacent cell strings along the string arrangement direction is d₂Wherein d is₂Satisfies the following conditions: d is not less than 1mm₂≤3mm。

16. The photovoltaic module of any of claims 1-9 wherein the photovoltaic cell layer has two first edges opposite each other along the string extension direction and two second edges opposite each other along the string arrangement direction;

the photovoltaic module further includes:

a front cover plate disposed on the front side of the photovoltaic cell layer, the distance between the first edge and the corresponding edge of the front cover plate being d₃The distance between the second edge and the corresponding edge of the front cover plate is d₄Wherein d is₃、d₄Respectively satisfy: d is not less than 15mm₃≤24mm，8.5mm≤d₄≤17mm；

The back cover plate is arranged on the back of the photovoltaic cell layer.

17. The assembly according to any one of claims 1 to 9, wherein the distance between two side edges of two adjacent cell sheets of each cell string adjacent to each other is d₅Wherein d is₅Satisfies the following conditions: d is less than or equal to-1 mm₅≤2.5mm。

18. The photovoltaic module of any one of claims 1-9 wherein each of the cell pieces has a length L₂Wherein, said L₂Satisfies the following conditions: l is more than or equal to 156mm₂≤240mm。

19. The photovoltaic module of claim 18, wherein L is₂Further satisfies the following conditions: l is more than or equal to 182mm₂≤240mm。