CN220041876U - Back contact type photovoltaic module - Google Patents

Abstract

The utility model discloses a back contact type photovoltaic module, relates to the technical field of photovoltaics, and aims to solve the problems that the use of the back contact type photovoltaic module or the tracing of relevant information of the back contact type photovoltaic module is affected due to the fact that no bus bar exists on the front face of a back contact type battery and no proper setting position exists on a bar code. The back contact type photovoltaic module comprises a cover plate, a glue film layer, a battery piece layer and a conductive backboard which are sequentially stacked from top to bottom. The battery piece layer comprises a plurality of battery pieces which are arranged at intervals, and the conductive backboard comprises an insulating layer, a conductive layer, an adhesive layer and a packaging board which are sequentially laminated from top to bottom. The insulating layer is arranged below the battery piece layer, the insulating layer is provided with an opening area, and the conducting layer is electrically connected with the battery piece layer through the opening area. The identification piece is located between the battery piece layer and the insulating layer and is arranged on the insulating layer, and the identification piece can be identified.

Description

Back contact type photovoltaic module

Technical Field

The utility model relates to the technical field of photovoltaics, in particular to a back contact type photovoltaic module.

Background

A photovoltaic module is a device for realizing photoelectric conversion, and generally includes a battery sheet layer, a bus bar, a packaging adhesive film, a light-transmitting cover plate, a back plate, a frame, a junction box, a bar code, and the like.

In the prior art, bus bars are generally provided at the ends (i.e., edge regions) of the battery sheet layers, and the bus bars are used to draw out the current of a plurality of battery strings. Further, the bar code is disposed on the bus bar, and the bar code faces the translucent cover plate.

However, the front surface of the back contact type photovoltaic module is not provided with a bus bar, and the bar code is usually required to be arranged inside the photovoltaic module, so that the bar code is rarely or not stuck on a frame, and the bar code is prevented from being lost. Therefore, the bar code has no proper setting position, and thus the use of the back contact type photovoltaic module or the tracing of relevant information thereof can be influenced.

Disclosure of Invention

The utility model aims to provide a back contact type photovoltaic module, which is used for setting a bar code so as to facilitate the use of the back contact type photovoltaic module or the tracing of relevant information of the back contact type photovoltaic module.

In order to achieve the above object, the present utility model provides a back contact photovoltaic module. The back contact type photovoltaic module comprises a cover plate, a glue film layer, a battery piece layer and a conductive backboard which are sequentially stacked from top to bottom. The battery piece layer comprises a plurality of battery pieces which are arranged at intervals, and the conductive backboard comprises an insulating layer, a conductive layer, an adhesive layer and a packaging board which are sequentially laminated from top to bottom. The insulating layer is arranged below the battery piece layer, the insulating layer is provided with an opening area, and the conducting layer is electrically connected with the battery piece layer through the opening area. The identification piece is located between the battery piece layer and the insulating layer and is arranged on the insulating layer, and the identification piece can be identified.

Compared with the prior art, in the back contact type photovoltaic module provided by the utility model, the identification piece is positioned between the battery piece layer and the insulating layer, so that the identification piece can be identified. At this time, see the inside of back contact formula photovoltaic module through the apron, can clearly accurate discernment to the recognition piece. Based on the method, the relevant information of the back contact type photovoltaic module can be accurately obtained through the identification piece, so that the back contact type photovoltaic module can be conveniently used or the relevant information of the back contact type photovoltaic module can be traced. Further, since the identification piece is arranged on the insulating layer, the normal operation of the battery sheet layer, the conducting layer or other layers is not affected at this time, so that the working performance of the back contact type photovoltaic module is ensured. Meanwhile, the whole area of the insulating layer is larger, so that the selectivity of the specific setting position of the identification piece can be increased, the back contact type photovoltaic module is suitable for different application scenes, and the application range of the back contact type photovoltaic module is further enlarged.

In one implementation, the identification element includes a bar code or an electronic tag.

Under the condition of adopting the technical scheme, the selectivity is increased for the staff, and the identification piece can adapt to different application scenes at the moment so as to enlarge the application range of the identification piece.

In one implementation, the battery sheet layer includes a plurality of battery strings disposed at intervals, and each battery string includes a plurality of battery sheets disposed at intervals. The identification piece is positioned in a gap between strings of the battery strings, or the identification piece is positioned in a gap between battery pieces in the battery strings, or the identification piece is positioned in a gap between the battery pieces and the frame.

Under the condition of adopting the technical scheme, the setting positions of the identification pieces are various, so that the selectivity is increased for staff. At this time, the identification piece can be further adapted to different application scenes, and the application range of the identification piece is further expanded. Further, since the identification piece is located at the gap between different structures, at this time, the connection firmness of the identification piece and the insulating layer can be ensured on the basis of not affecting the battery piece or other structures, so as to ensure the quality of the back contact type photovoltaic module.

In one implementation, the identification element is disposed in a central region of the insulating layer.

Under the condition of adopting the technical scheme, in the process of laminating to form the back contact type photovoltaic module, the stress of the identification piece positioned in the central area of the insulating layer is balanced, at the moment, the flatness of the identification piece can be ensured, the condition that the identification piece is wrinkled is reduced or avoided, so that information in the identification piece can be quickly and accurately identified and read in the later period, and the identification efficiency and the identification accuracy are improved. Further, flatness of the insulating layer below the identification piece can be guaranteed, quality of the back contact type photovoltaic module is guaranteed, and attractiveness of the back contact type photovoltaic module is improved. Still further, because the identification piece sets up in the central region of insulating layer, at this moment, the specification of apron, glued membrane layer, battery piece layer and electrically conductive backplate can be unified. Based on the structure, the back contact type photovoltaic module is bilaterally symmetrical, so that the attractiveness of the back contact type photovoltaic module is further improved. Meanwhile, the integral size of the back contact type photovoltaic module can be prevented from being increased due to the fact that the size of a certain layer is large, so that the material cost of the back contact type photovoltaic module is saved, and the conversion efficiency of the back contact type photovoltaic module is improved. Then, the situation that the increased area is not fully utilized and the white is left due to the fact that the area of the insulating layer is increased due to the fact that the position is reserved for the identification piece is needed to be reserved can be avoided, and accordingly the attractiveness of the back contact type photovoltaic module is further improved. In addition, the recognition piece can be prevented from being blocked by a frame or other structures, so that the recognition rate of the recognition piece is ensured.

In one implementation, the identification element is disposed in an end region of the insulating layer. At this time, the identification piece can be enabled to quickly arrive at the identification position, so that the time from carrying to identification is saved, and the working efficiency is improved.

In one implementation, the back contact photovoltaic module further includes: and a bus bar. The first end and the conducting layer electricity of busbar are connected, and the second end and the terminal box electricity of busbar are connected, and identification piece and busbar interval set up.

Under the condition of adopting the technical scheme, because the identification piece and the bus bar are arranged at intervals, the situation that the identification piece is wrinkled or raised due to bending of the bus bar can be reduced or avoided, so that the flatness of the identification piece is ensured, the information in the identification piece is rapidly and accurately identified and read in the later period is further ensured, and the identification efficiency and the identification accuracy are improved.

In one implementation, the area of the insulating layer is greater than the area of the conductive layer and the area of the battery layer, respectively.

Under the condition of adopting the technical scheme, the identification piece is favorable to being arranged in the end region of the insulating layer, and the situation that the identification piece cannot be identified due to the fact that the area reserved for the identification piece is insufficient is avoided.

In one implementation, the insulating layer is an EPE insulating layer or a polyimide insulating layer.

In one implementation, the tie layer is a polyolefin elastomer tie layer, an ethylene-vinyl acetate copolymer tie layer, or a polyvinyl butyral tie layer.

In one implementation, the package board is a TPC package board, a KPC package board, a PC package board, or a CPC package board.

In one implementation, the conductive layer is a copper-aluminum conductive layer, an aluminum foil conductive layer, a copper foil aluminum plated conductive layer, a copper foil nickel plated conductive layer, a copper foil tin plated conductive layer, an aluminum foil copper plated conductive layer, an aluminum foil tin plated conductive layer, or an aluminum foil nickel plated conductive layer.

Under the condition of adopting the technical scheme, the materials of the insulating layer, the conducting layer, the bonding layer and the packaging plate are not limited to a certain material, and the selectivity of the packaging plate can be increased according to actual conditions. At this time, the back contact type photovoltaic module can be further adapted to different application scenes, and the application range of the back contact type photovoltaic module is enlarged.

In one implementation, the first end of the bus bar is located between the conductive layer and the insulating layer. The first end of the bus bar is arranged in the central area of the conductive layer; and/or the first ends of the bus bars are disposed at end regions of the conductive layer.

Under the condition of adopting the technical scheme, the selectivity of the bus bar setting position is increased, so that the back contact type photovoltaic module is suitable for different application scenes, and the application range of the back contact type photovoltaic module is further enlarged.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

fig. 1 is a schematic structural diagram of a back contact photovoltaic module according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a back contact photovoltaic module according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a back contact photovoltaic module according to an embodiment of the present utility model;

FIG. 4 is an enlarged schematic view of the structure at C in FIG. 3 according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram showing the positional relationship between adjacent battery strings and identification members according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram of an insulating layer according to an embodiment of the present utility model;

fig. 7 is a schematic structural diagram of a conductive layer according to an embodiment of the utility model.

Reference numerals:

1-back contact type photovoltaic module, 2-cover plate, 3-adhesive film layer,

4-cell layers, 40-cell sheets, 41-cell strings,

42-inter-string gaps, 43-inter-chip gaps, 5-conductive backplates,

a 50-insulating layer, a 500-central region of the insulating layer, a first end of the 501-insulating layer,

502-a second end of the insulating layer, 503-a first side of the insulating layer, 504-a second side of the insulating layer,

51-conductive layer, 510-central region of conductive layer, 511-first end of conductive layer, 512-second end of conductive layer, 513-first side of conductive layer, 514-second side of conductive layer, 52-adhesive layer, 53-package plate, 6-identification.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" 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 meaning of "a number" is one or more than one unless specifically defined otherwise.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In order to solve the technical problems, the embodiment of the utility model provides a back contact type photovoltaic module. Referring to fig. 1 to 5, the back contact photovoltaic module 1 may include a cover plate 2, a glue film layer 3, a battery sheet layer 4 and a conductive back plate 5 stacked in order from top to bottom. The battery sheet layer 4 includes a plurality of battery sheets 40 arranged at intervals, and the conductive back plate 5 includes an insulating layer 50, a conductive layer 51, an adhesive layer 52 and a package plate 53 which are sequentially stacked from top to bottom. An insulating layer 50 is provided under the battery sheet layer 4, the insulating layer 50 having an opening region (not shown in fig. 1 to 5) through which the conductive layer 51 is electrically connected to the battery sheet layer 4. The identification member 6 is located between the battery sheet layer 4 and the insulating layer 50, and is provided to the insulating layer 50, and the identification member 6 can be identified.

The specific structures, materials, and the like of the cover plate, the adhesive film layer, and the battery sheet layer are not particularly limited herein, so long as the actual needs are satisfied. Further, the conductive layer may be electrically connected to the battery sheet layer through conductive paste.

Referring to fig. 1 to 5, in the back contact photovoltaic module 1 provided by the embodiment of the present utility model, since the identification member 6 is located between the battery sheet layer 4 and the insulating layer 50, the identification member 6 can be identified. At this time, the identification member 6 can be clearly and accurately identified by looking into the back contact photovoltaic module 1 through the cover plate 2. Based on this, the relevant information of the back-contact photovoltaic module 1 can be accurately known through the identification piece 6, so that the back-contact photovoltaic module 1 is used or the relevant information of the back-contact photovoltaic module 1 is traced. Further, since the identification member 6 is disposed on the insulating layer 50, the normal operation of the battery sheet layer 4, the conductive layer 51 or other layers is not affected at this time, so as to ensure the operation performance of the back contact photovoltaic module 1. Meanwhile, the overall area of the insulating layer 50 is larger, so that the selectivity of the specific setting position of the identification piece 6 can be increased, the back contact type photovoltaic module 1 can adapt to different application scenes, and the application range of the back contact type photovoltaic module is further enlarged.

As a possible implementation, the identification element may be, but is not limited to, a bar code or an electronic tag. Under the condition of adopting the technical scheme, the selectivity is increased for the staff, and the identification piece can adapt to different application scenes at the moment so as to enlarge the application range of the identification piece. The electronic tag is generally a RFID (Radio Frequency Identification) tag.

As a possible implementation, referring to fig. 3 to 5, the above-mentioned battery sheet layer may include a plurality of battery strings 41 arranged at intervals, and each battery string 41 includes a plurality of battery sheets 40 arranged at intervals. The identification member 6 is located in an inter-string gap 42 of the battery string 41, or the identification member 6 is located in an inter-sheet gap 43 of the battery sheet 40 within the battery string 41, or a gap between the battery sheet 40 and the frame (none of which is shown in fig. 3 to 5).

The above-mentioned identification member 6 is provided in various positions, which increases the selectivity for the worker. At this time, the identification piece 6 can be further adapted to different application scenes, and the application range of the identification piece is further enlarged. Further, since the identification member 6 is located at the gap between different structures, the connection firmness between the identification member 6 and the insulating layer 50 can be ensured on the basis of not affecting the battery piece 40 or other structures, so as to ensure the quality of the back-contact photovoltaic module 1.

For example, the above-described battery sheet layers may employ a plurality of half-sheets IBC (Interdigitated back contact, i.e., interdigitated back contact) battery sheets in series. Further, the dimensions of the IBC battery plates described above are applicable to square dimensions of 166mm, 182mm, 210mm or other dimensions. Referring to fig. 3, in the embodiment of the present utility model, two adjacent battery strings 41 are provided for each row in the first direction a. In the second direction B, six rows of battery strings 41 are provided. The first direction a is perpendicular to the second direction B.

The following description is given by way of example of three possible scenarios, it being understood that the following description is provided for understanding only and is not intended to be limiting in any way.

For example, referring to fig. 4, when the identification member 6 is positioned in the inter-sheet gap 43 of the battery cells 40 in the battery string 41, the interval between two adjacent battery cells 40 (i.e., the width W3 of the inter-sheet gap 43) is greater than or equal to the width W1 of the identification member 6, and the width direction of the identification member 6 is parallel to the length direction of the battery string 41.

For example, referring to fig. 5, when the identification member 6 is positioned in the inter-string gap 42 of the battery strings 41, the interval between the adjacent two battery strings 41 (i.e., the width W2 of the inter-string gap 42) is greater than or equal to the width W1 of the identification member 6, and the width direction of the identification member 6 is parallel to the arrangement direction of the adjacent two battery strings 41.

In an example three, when the identification member is located in the gap between the battery piece and the frame, the distance between the battery piece and the frame (i.e., the width of the gap) is greater than or equal to the width of the identification member, and the width direction of the identification member is perpendicular to the frame located at one side of the identification member.

It should be understood that, in the above three cases, the specific size of the gap may be set according to the actual situation, and will not be described in detail herein.

As can be seen from the foregoing description, the identification element is provided on the insulating layer, and as regards the position of the identification element relative to the insulating layer, the following description is given by way of example of two possible cases, it being understood that the following description is for understanding only and is not intended to be limiting in any way.

For example, referring to fig. 6, the identification element is disposed in a central region 500 of the insulating layer.

Under the condition of adopting the technical scheme, in the process of laminating to form the back contact type photovoltaic module 1, the recognition piece 6 positioned in the central area 500 of the insulating layer is stressed and balanced, at the moment, the flatness of the recognition piece 6 can be ensured, the condition that the recognition piece 6 is wrinkled is reduced or avoided, so that information in the recognition piece 6 can be recognized and read quickly and accurately in the later stage, and the recognition efficiency and recognition accuracy are improved. Further, the flatness of the insulating layer 50 located below the identification member 6 can also be ensured to ensure the quality of the back-contact photovoltaic module 1, improving the aesthetic degree of the back-contact photovoltaic module 1. Still further, since the identification member 6 is disposed in the central region 500 of the insulating layer, the specifications of the cover plate 2, the adhesive film layer 3, the battery sheet layer 4 and the conductive back plate 5 may be unified. Based on this, not only the back contact type photovoltaic module 1 can be made laterally symmetrical, so as to further improve the aesthetic degree of the back contact type photovoltaic module 1. Meanwhile, the whole size of the back contact type photovoltaic module 1 can be prevented from being increased due to the fact that the size of a certain layer is large, so that the material cost of the back contact type photovoltaic module 1 is saved, and the conversion efficiency of the back contact type photovoltaic module 1 is improved. Next, it is also possible to avoid the situation that the increased area is not fully utilized and the occurrence of the white-keeping due to the need to reserve the installation position for the identification member 6 to increase the area of the insulating layer 50, so as to further improve the aesthetic degree of the back contact type photovoltaic module 1. In addition, shielding of the identification member 6 by a bezel or other structure can be avoided to ensure the identification rate of the identification member 6.

For example, referring to fig. 6, the identification member 6 is disposed at an end region of the insulating layer 50. At this time, the identification member 6 can be quickly moved to the identification position, and the time from the transportation to the identification can be saved, thereby improving the work efficiency. Illustratively, the end regions of the insulating layer 50 described above include a first end 501 of the insulating layer, a second end 502 of the insulating layer, a first side 503 of the insulating layer, and a second side 504 of the insulating layer. Thus, the identification element 6 may be provided at one or more of the first end 501 of the insulating layer, the second end 502 of the insulating layer, the first side 503 of the insulating layer, and the second side 504 of the insulating layer.

As a possible implementation, the area of the insulating layer is larger than the area of the conductive layer and the area of the battery layer, respectively. At this time, be favorable to setting up the recognition element in the tip region of insulating layer, avoid appearing because of reserving the regional area inadequately for the recognition element, lead to the recognition element to shelter from the condition that can't be discerned by frame or other structures.

As a possible implementation manner, the back contact photovoltaic module may further include: and a bus bar. The first end and the conducting layer electricity of busbar are connected, and the second end and the terminal box electricity of busbar are connected, and identification piece and busbar interval set up.

Because the recognition piece and the bus bar are arranged at intervals, the situation that the recognition piece is wrinkled or raised due to bending of the bus bar can be reduced or avoided, so that the flatness of the recognition piece is ensured, the information in the recognition piece is rapidly and accurately recognized and read in the later period, and the recognition efficiency and the recognition accuracy are improved.

In actual use, the cells in the cell layer sink the collected current to the conductive layer, which is then conducted to the bus bar. And then led out by the bus bar to be conducted to the junction box.

In one alternative, referring to fig. 7, the first end of the bus bar is located between the conductive layer and the insulating layer. The first ends of the bus bars are disposed in a central region 510 of the conductive layer. And/or the first ends of the bus bars are disposed at end regions of the conductive layer 51. At this time, the selectivity of the bus bar setting position is increased, so that the back contact type photovoltaic module 1 is adapted to different application scenes, and the application range is further enlarged. As for the specific arrangement of the bus bars, reference is made to the prior art, and no specific limitation is made herein.

Illustratively, the end regions of the conductive layer 51 described above include a first end 511 of the conductive layer, a second end 512 of the conductive layer, a first side 513 of the conductive layer, and a second side 514 of the conductive layer. Thus, the first ends of the bus bars may be disposed at one or more of the first end 511 of the conductive layer, the second end 512 of the conductive layer, the first side 513 of the conductive layer, and the second side 514 of the conductive layer.

As a possible implementation, referring to fig. 4 and 5, the insulating layer may be an EPE insulating layer or a Polyimide insulating layer (i.e., an insulating layer made of PI, abbreviated as PI).

Illustratively, the EPE insulating layer includes an E film, a PET substrate, and an E film. The PET substrate is provided with two opposite surfaces, and each surface is respectively provided with an E film. The E film is an organic adhesive film, and the organic adhesive film may generally include an EVA film, a POE film, a PE film, a PO film, a modified film of the four films, or a mixed film of at least two films. It should be appreciated that both EPE and PI are conventional materials in the art.

As a possible implementation, see fig. 4 and 5, the above-mentioned adhesive layer may be a polyolefin elastomer adhesive layer (Polyolefin elastomer, abbreviated as POE), an ethylene-vinyl acetate copolymer adhesive layer (ethylene-vinyl acetate copolymer, abbreviated as EVA) or a polyvinyl butyral adhesive layer (Polyvinyl Butyral, abbreviated as PVB). It should be understood that the adhesive film layer and the adhesive layer may or may not be the same material.

As a possible implementation, see fig. 4 and 5, the package board may be a TPC package board, a KPC package board, a PC package board or a CPC package board.

Illustratively, the TPC package plate includes a PVF (polyvinyl fluoride) film, a PET substrate, and a Coating. The KPC packaging board comprises a PVDF (polyvinylidene difluoride) film, a PET substrate and a Coating. The PC package board comprises a PET (Polyethylene terephthalate) substrate and a Coating. The CPC packaging plate comprises a Coating layer, a PET base material and a Coating layer. It should be appreciated that both TPC, KPC, PC and CPC described above are conventional materials in the art.

As a possible implementation, referring to fig. 4 and 5, the above-mentioned conductive layer is a copper-aluminum conductive layer, an aluminum foil conductive layer, a copper foil aluminum plating conductive layer, a copper foil nickel plating conductive layer, a copper foil tin plating conductive layer, an aluminum foil copper plating conductive layer, an aluminum foil tin plating conductive layer, or an aluminum foil nickel plating conductive layer.

Under the condition of adopting the technical scheme, the materials of the insulating layer, the conducting layer, the bonding layer and the packaging plate are not limited to a certain material, and the selectivity of the packaging plate can be increased according to actual conditions. At this time, the back contact type photovoltaic module can be further adapted to different application scenes, and the application range of the back contact type photovoltaic module is enlarged.

In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (10)

1. The back contact type photovoltaic module is characterized by comprising a cover plate, an adhesive film layer, a battery piece layer and a conductive back plate which are sequentially laminated from top to bottom; the battery piece layer comprises a plurality of battery pieces which are arranged at intervals, and the conductive backboard comprises an insulating layer, a conductive layer, an adhesive layer and a packaging board which are sequentially laminated from top to bottom;

the insulating layer is arranged below the battery piece layer; the insulating layer is provided with an opening area, and the conducting layer is electrically connected with the battery piece layer through the opening area;

the identification piece is positioned between the battery piece layer and the insulating layer and is arranged on the insulating layer; the identification member can be identified.

2. The back contact photovoltaic module of claim 1, wherein the identification member comprises a bar code or an electronic label.

3. The back contact photovoltaic module of claim 1, wherein the cell sheet layer comprises a plurality of spaced apart cell strings, each cell string comprising a plurality of spaced apart cell sheets;

the identification piece is positioned in a gap between the battery strings, or a gap between the battery pieces in the battery strings, or a gap between the battery pieces and the frame.

4. The back contact photovoltaic module of claim 3, wherein the identification member is disposed in a central region of the insulating layer or in an end region of the insulating layer.

5. The back-contact photovoltaic module according to any one of claims 1 to 4, further comprising: a bus bar; the first end of the bus bar is electrically connected with the conductive layer, and the second end of the bus bar is electrically connected with the junction box; the identification piece is arranged at intervals with the bus bar.

6. The back contact photovoltaic module of any of claims 1-4, wherein the insulating layer has an area that is greater than the area of the conductive layer and the area of the cell layer, respectively.

7. The back contact photovoltaic module of any of claims 1-4, wherein the insulating layer is an EPE insulating layer or a polyimide insulating layer.

8. The back contact photovoltaic module of any of claims 1-4, wherein the tie layer is a polyolefin elastomer tie layer, an ethylene-vinyl acetate copolymer tie layer, or a polyvinyl butyral tie layer; or the packaging plate is a TPC packaging plate, a KPC packaging plate, a PC packaging plate or a CPC packaging plate.

9. The back-contact photovoltaic module of any of claims 1-4, wherein the conductive layer is a copper-aluminum conductive layer, an aluminum foil conductive layer, a copper foil aluminum plated conductive layer, a copper foil nickel plated conductive layer, a copper foil tin plated conductive layer, an aluminum foil copper plated conductive layer, an aluminum foil tin plated conductive layer, or an aluminum foil nickel plated conductive layer.

10. The back contact photovoltaic assembly of claim 5, wherein the first end of the bus bar is located between the conductive layer and the insulating layer;

the first end of the bus bar is arranged in the central area of the conductive layer; and/or, the first end of the bus bar is arranged at the end region of the conductive layer.