CN117637887B - Photovoltaic module and method for manufacturing the same - Google Patents

Abstract

The application relates to a photovoltaic module and a manufacturing method of the photovoltaic module, wherein the photovoltaic module comprises a battery layer, a front plate, a back plate, a glue film layer and a reinforcing structure, and the front plate is arranged on the light-facing side of the battery layer; the backboard is arranged on the backlight side of the battery layer; the adhesive film layer is positioned between the battery layer and the front plate and between the battery layer and the back plate; the reinforcing structure comprises a first reinforcing part and a second reinforcing part, wherein the first reinforcing part covers at least part of the light-facing surface of the front plate, the second reinforcing part covers the side wall of the front plate, and two ends of the second reinforcing part are respectively connected with the first reinforcing part and the adhesive film layer along the first direction. The reinforced structure can jointly form wrapped protection with the adhesive film layer on the edge of the front plate so as to improve the impact resistance of the front plate, reduce the risk of hidden cracking or damage of the battery layer under the conditions of production, transportation, installation and hail impact, and further achieve the effect of prolonging the service life of the photovoltaic module.

Description

Photovoltaic module and method for manufacturing the same

Technical Field

The present application relates to the field of photovoltaic technology, and in particular to a photovoltaic module and a method for manufacturing the photovoltaic module.

Background technique

Solar energy is an inexhaustible renewable energy source for mankind. Photovoltaic modules are the core and most important part of solar power generation systems. Their function is to convert solar energy into electrical energy and store it in batteries or drive loads.

Existing photovoltaic modules usually include a front panel, a battery layer and a back panel. However, the front panel has a relatively fragile edge and is easily damaged when impacted by external forces, resulting in the service life of the photovoltaic module not meeting expectations.

Summary of the invention

The present application provides a photovoltaic module and a method for manufacturing the photovoltaic module, which can improve the impact resistance of the photovoltaic module.

In a first aspect, the present application provides a photovoltaic module, comprising:

Battery layer;

A front plate, arranged on the light-facing side of the battery layer;

A backplane, disposed on the backlight side of the battery layer;

An adhesive film layer, located between the battery layer and the front plate and between the battery layer and the back plate;

The reinforcement structure includes a first reinforcement part and a second reinforcement part, wherein the first reinforcement part covers at least a portion of the light-facing surface of the front panel, and the second reinforcement part covers the side wall of the front panel. Along the first direction, two ends of the second reinforcement part are respectively connected to the first reinforcement part and the adhesive film layer.

In a possible design, the edges of the first reinforcing portion, the second reinforcing portion, the adhesive film layer, and the back plate are aligned in the first direction.

In a possible design, the width of the portion of the first reinforcement portion covering the front plate is W1, 5mm≤W1≤15mm.

In a possible design, the first reinforcement portion includes a covering layer and an adhesive layer. Along the first direction, the covering layer and the front panel are respectively located on both sides of the adhesive layer, and the covering layer is fixed to the light-facing surface of the front panel through the adhesive layer.

In a possible design, the thickness of the coating layer is D1, 0.3 mm≤D1≤3 mm.

In a possible design, the material of the coating layer is one or more of thermoplastic polyester elastomer, thermoplastic polyolefin elastomer, polyethylene terephthalate, polymethyl methacrylate, polyvinyl chloride, and ethylene propylene diene monomer rubber.

In a possible design, the thickness of the adhesive layer is D2, 0.1 mm≤D2≤0.7 mm.

In a possible design, the thickness of the second reinforcement portion is D3, 0mm<D3≤10mm.

In a possible design, the bonding layer, the second reinforcement portion and the adhesive film layer are made of the same material.

A second aspect of the present application provides a method for manufacturing a photovoltaic module, wherein the photovoltaic module comprises a battery layer, a front plate, a film layer, a back plate and a reinforcement structure, wherein the film layer comprises a first film layer and a second film layer, and the reinforcement structure comprises a first reinforcement part and a second reinforcement part;

The production method comprises:

Place the front plate with the light-facing side facing upwards;

The first reinforcing portion is arranged on the light-facing surface of the front plate;

Turning over the front plate and the first reinforcing portion as a whole so that the backlight surface of the front plate faces upward;

Laying the first adhesive film layer, the battery layer, the second adhesive film layer and the backplane layer by layer along a first direction on the backlight surface of the front plate to form a pre-laminated member;

The pre-laminated parts are laminated to form the second reinforcement part covering the side wall of the front plate between the first reinforcement part and the first adhesive film layer, so as to form the photovoltaic module.

In one possible design, the first reinforcing portion includes a covering layer and an adhesive layer; when the first reinforcing portion is provided on the light-facing surface of the front panel, the manufacturing method specifically includes: laying the adhesive layer on at least a portion of the light-facing surface of the front panel; and laying the covering layer on a surface of the adhesive layer away from the front panel.

In one possible design, when the adhesive layer is laid on at least a portion of the light-facing surface of the front panel, the manufacturing method specifically includes: heating the adhesive layer at intervals in the second direction and/or the third direction so that at least a portion of the adhesive layer is fixedly connected to the front panel; the first direction, the second direction and the third direction are perpendicular to each other.

In one possible design, along the second direction and/or the third direction, the size of the first adhesive film layer is greater than or equal to the size of the front panel; when the adhesive layer is laid on at least a portion of the light-facing surface of the front panel, the manufacturing method specifically includes: along the second direction and/or the third direction, at least a portion of the adhesive layer is extended to the outside of the front panel, so that the adhesive layer and the first adhesive film layer form a first accommodating space in the first direction; the first direction, the second direction and the third direction are perpendicular to each other.

In one possible design, the adhesive layer is made of the same material as the first adhesive film layer; when the pre-laminated component is laminated, at least part of the adhesive layer and/or at least part of the first adhesive film layer can flow toward the first accommodating space in a molten state to form the second reinforcement portion in the first accommodating space.

In one possible design, before the first reinforcement portion is provided on the light-facing surface of the front panel, the manufacturing method specifically includes: sticking a high-temperature tape on the light-facing surface of the front panel so that the high-temperature tape and the front panel form a second accommodating space for accommodating the first reinforcement portion.

In the present application, the first reinforcement part can wrap around the four edges of the front panel, thereby improving the structural strength of the edge of the front panel, thereby improving the impact resistance of the front panel, and further reducing the risk of hidden cracks or damage to the battery layer during production, transportation, installation and hail impact; the second reinforcement part can wrap around the side wall of the front panel to prevent the side wall of the front panel from being scratched or bumped during transportation and installation. Therefore, the reinforcement structure can form a wrapping protection for the edge of the front panel together with the film layer to improve the impact resistance of the front panel, thereby achieving the effect of extending the service life of the photovoltaic module.

It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a top view of a photovoltaic module provided in the present application;

FIG2 is a schematic diagram of the cross-sectional structure of the photovoltaic module in FIG1 along the AA′ direction;

FIG3 is a partial cross-sectional schematic diagram of the photovoltaic module in FIG2 ;

FIG4 is a flow chart of a method for manufacturing a photovoltaic module provided in the present application;

FIG5 is a flow chart of a method for manufacturing a photovoltaic module provided in the present application;

FIG6 is a top view of the photovoltaic assembly in step A2;

FIG7 is a schematic cross-sectional structure diagram of a pre-laminated member provided in the present application;

FIG8 is a top view of the photovoltaic assembly before step S2;

FIG. 9 is a flow chart of a method for manufacturing a photovoltaic module provided in the present application.

Reference numerals:

10- first accommodation space;

20- second accommodation space;

1-Battery layer;

2-Front plate;

3- back panel;

4- Adhesive film layer;

41- first adhesive film layer;

42- second adhesive film layer;

5- Strengthen the structure;

51- first reinforcement part;

511- cladding layer;

512-adhesive layer;

52- second reinforcement part;

6-High temperature tape.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

Detailed ways

In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

It should be understood that the term "and/or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship.

It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

An embodiment of the present application provides a photovoltaic module, as shown in Figures 1 and 2, the photovoltaic module includes a cell layer 1, a front panel 2, a back panel 3, a film layer 4 and a reinforcement structure 5, the front panel 2 is arranged on the light-facing side of the cell layer 1, the back panel 3 is arranged on the backlight side of the cell layer 1, and the film layer 4 is located between the cell layer 1 and the front panel 2 and between the cell layer 1 and the back panel 3.

In this embodiment, the battery layer 1 includes a plurality of battery strings connected in series or in parallel, each battery string is formed by a plurality of battery cells (including but not limited to monocrystalline silicon battery cells and polycrystalline silicon battery cells) connected in series, and two adjacent battery cells are connected by welding strips; the front plate 2 is located on the light-facing side of the battery layer 1, and is used to protect the surface of the battery layer 1 and reduce the risk of damage to the battery cells; the back plate 3 is located on the backlight side of the battery layer 1, and has the function of blocking water vapor and insulating protection; the film layer 4 includes a first film layer 41 and a second film layer 41, along the first direction Z, the first film layer 41 is located between the front plate 2 and the battery layer 1, and is used to achieve a fixed connection between the front plate 2 and the battery layer 1, and the second film layer 42 is located between the battery layer 1 and the back plate 3, and is used to achieve a fixed connection between the battery layer 1 and the back plate 3, and the first film layer 41 and the second film layer 42 can also play a certain supporting and protective role on the battery layer 1, to ensure that the photovoltaic module has good mechanical strength and reduce the impact of hail impact, wind blowing, mechanical vibration and the like.

As shown in FIG2 , the reinforcement structure 5 is located on both sides of the front panel 2 along the second direction X and on both sides of the front panel 2 along the third direction Y, so as to wrap around the edges of the front panel 2. The reinforcement structure 5 includes a first reinforcement portion 51 and a second reinforcement portion 52. The first reinforcement portion 51 covers the edges of the light-facing surface of the front panel 2, which can improve the front impact resistance of the front panel 2 and prevent the front panel 2 from being broken due to concentrated load impact; the second reinforcement portion 52 covers the side walls of the front panel 2, which is used to protect the side walls of the front panel 2 and prevent the side walls of the front panel 2 from being scratched or bumped during transportation and installation. Moreover, along the first direction Z, the two ends of the second reinforcement part 52 are respectively connected to the first reinforcement part 51 and the first adhesive film layer 41. On the one hand, it can improve the connection stability among the three and reduce the possibility of the reinforcement structure 5 falling off the front panel 2. On the other hand, the first reinforcement part 51, the second reinforcement part 52 and the first adhesive film layer 41 can jointly form a wrapping structure for the front panel 2. The first adhesive film layer 41 can play a shock-absorbing role on the backlight surface of the front panel 2, thereby reducing the impact of external impact on the front panel 2 and protecting the battery layer 1 from damage.

In the photovoltaic module provided by the present application, the first reinforcing part 51 can wrap around the four peripheral parts of the front panel 2, thereby improving the structural strength of the edge of the front panel 2, thereby improving the impact resistance of the front panel 2, and further reducing the risk of hidden cracks or damage to the battery layer 1 during production, transportation, installation and hail impact; the second reinforcing part 52 can wrap around the side wall of the front panel 2 to prevent the side wall of the front panel 2 from being scratched or bumped during transportation and installation. Therefore, the reinforcing structure 5 can form a wrapping protection for the edge of the front panel 2 together with the film layer 4 to improve the impact resistance of the front panel 2, thereby achieving the effect of extending the service life of the photovoltaic module.

It should be noted that the first direction Z may specifically be the height direction of the photovoltaic module, the second direction X may specifically be the width direction of the photovoltaic module, and the third direction Y may specifically be the length direction of the photovoltaic module.

This embodiment does not limit the structure of the battery cell. The types of battery cells include but are not limited to Passivated Emitter Rear Cell (PERC), Tunnel Oxide Passivated Contact (TOPCon), Heterojunction with Intrinsic Thin-film (HJT), Interdigitated Back Contact (IBC), perovskite battery, etc.

For PERC cells, along the thickness direction, PERC cells include front surface metal silver electrode, front surface silicon nitride passivation layer, phosphorus layer emitter, P-type base silicon layer, local aluminum back field, metal aluminum back electrode, back passivation layer (Al2O3/SiNx). PERC cells use a passivation film to passivate the back, replacing the full aluminum back field, enhancing the internal back reflection of light in the silicon base, reducing the recombination rate on the back, and increasing the efficiency of the cell by 0.5%-1%.

For TOPCon cells, along the thickness direction, TOPCon cells include metal silver electrodes, front surface silicon nitride passivation layers, boron-doped emitters, N-type base silicon layers, diffused doping layers, ultra-thin silicon oxide, doped polysilicon, silicon nitride, and metal silver electrodes. The back of the cell is composed of an ultra-thin silicon oxide layer (1nm~2nm) and a phosphorus-doped microcrystalline amorphous mixed Si film, which together form a passivation contact structure. This structure can block the recombination of minority carrier holes and increase the open circuit voltage and short circuit current of the cell. The ultra-thin oxide layer allows majority electrons to tunnel into the polysilicon layer while blocking the recombination of minority carrier holes. The good passivation effect of ultra-thin silicon oxide and heavily doped silicon film causes the energy band on the silicon wafer surface to bend, thereby forming a field passivation effect, greatly increasing the probability of electron tunneling, reducing contact resistance, and increasing the open circuit voltage and short circuit current of the cell, thereby improving the cell conversion efficiency.

For HJT cells, along the thickness direction, the HJT cells include a front low-temperature silver electrode, a front conductive film, an N-type amorphous silicon film, an intrinsic amorphous silicon film, an N-type base silicon layer, an intrinsic amorphous silicon film, a P-type amorphous silicon film, a back conductive film, and a back low-temperature silver electrode.

For IBC cells, along the thickness direction, IBC cells include silicon nitride anti-layer, N+ front surface field, N-type base silicon layer, P+ emitter, N+ back field, aluminum oxide passivation layer, silicon nitride anti-reflection layer, and metal silver electrode. IBC cells use ion implantation technology to obtain P and N regions with good uniformity and precisely controllable junction depth. There is no grid line blocking on the front of the cell, which can eliminate the shading current loss of the metal electrode and achieve the maximum utilization of incident photons. The short-circuit current can be increased by about 7% compared with conventional solar cells; due to the back contact structure, there is no need to consider the grid line blocking problem, and the grid line ratio can be appropriately widened, thereby reducing the series resistance and having a high fill factor; the surface passivation and surface light trapping structure can be optimized to obtain a lower front surface recombination rate and surface reflection.

For perovskite cells, along the thickness direction, the perovskite cell includes substrate material, conductive film, electron transport layer (titanium dioxide), perovskite absorption layer (hole transport layer), and metal cathode. Perovskite materials have a high light absorption coefficient and a long carrier diffusion distance. After the photons absorbed by the perovskite material are converted into electrons, they are easily collected by the electrode with low loss, so they can generate higher photoelectric voltage and current, making perovskite show higher photoelectric conversion efficiency.

In a specific embodiment, the material of the front plate 2 can be one of the rigid materials such as tempered glass, polyethylene terephthalate (PET), polycarbonate (PC), etc., or one of the flexible materials such as polyvinyl fluoride (PVF), ethylene-tetrafluoroethylene copolymer (ETFE), polyvinylidene fluoride (PVDF), etc. All of the above materials have high light transmittance, which can ensure that more light is irradiated to the battery layer, thereby increasing the light absorption of the photovoltaic module and improving the photoelectric conversion efficiency of the photovoltaic module.

The photovoltaic module provided in the present application has a reinforcement structure 5. When the material of the front plate 2 is tempered glass (such as chemically tempered glass or physically tempered glass), the reinforcement structure 5 can protect the fragile edges of the glass to prevent the glass edges from being damaged due to external impact, thereby improving the impact resistance of the glass. Therefore, when tempered glass is selected as the front plate 2, the thickness of the glass can be appropriately reduced. In this way, while ensuring that the photovoltaic module has a reliable impact resistance, the overall thickness and weight of the photovoltaic module can be reduced, thereby achieving lightweight photovoltaic modules.

The thickness of the tempered glass can be 0.3 mm to 1.6 mm, for example, 0.3 mm, 0.4 mm, 0.5 mm, 0.7 mm, 0.9 mm, 1 mm, 1.2 mm, 1.4 mm, 1.5 mm or 1.6 mm, or other values within the above range, which are not limited in this embodiment. When the thickness of the tempered glass is within the above range, the structural strength of the tempered glass itself can be ensured, and its service life can be extended without excessively increasing the thickness and weight of the photovoltaic module.

In a specific embodiment, the material of the backboard 3 is one of CPC structural backboard, KPC structural backboard, TPC structural backboard, KPF structural backboard, glass fiber reinforced PP multilayer tape, TPO coating, etc. These materials have strong weather resistance and sufficient structural strength, which is conducive to improving the life of photovoltaic modules in actual outdoor use.

The thickness of the back sheet 3 may be 0.3 mm to 1 mm, for example, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm, or other values within the above range, which are not limited in this embodiment. When the thickness of the back sheet 3 is within the above range, the structural strength of the back sheet 3 itself can be ensured, and its service life can be extended without excessively increasing the thickness and weight of the photovoltaic module.

In a specific embodiment, the materials of the first adhesive film layer 41 and the second adhesive film layer 42 are all one of polyolefins such as ethylene-vinyl acetate copolymer (EVA), polyolefin elastomer (POE), polyvinyl butyral (PVB), etc. The above materials have high light transmittance, which is conducive to improving the photoelectric conversion efficiency of photovoltaic modules.

The thickness of the first adhesive film layer 41 and the second adhesive film layer 42 should be 0.3 mm to 1 mm, such as 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm, and can also be other values within the above range, which is not limited in this embodiment. When the thickness of the first adhesive film layer 41 and the second adhesive film layer 42 is within the above range, the packaging requirements of the photovoltaic module can be met, preferably, the photovoltaic module is ensured to have good mechanical strength, which helps to improve the yield and reliability of the photovoltaic module.

In addition, as shown in FIG. 2 , along the second direction X and/or the third direction Y, the sizes of the front panel 2, the first adhesive film layer 41, the second adhesive film layer 42 and the back panel 3 are all larger than the size of the battery layer 1, so as to protect the edges of the battery layer 1 and prevent the edges from being damaged by stress, which is beneficial to improving the life of the photovoltaic module.

In a specific implementation, as shown in FIG. 3 , the edges of the first reinforcing portion 51 , the second reinforcing portion 52 , the adhesive film layer 4 , and the back plate 3 are aligned in the first direction Z.

In this embodiment, the four edges are aligned in the first direction Z, so that the edge structure of the photovoltaic module is more regular and neat, which is conducive to the standardized production of photovoltaic modules. Moreover, photovoltaic modules with neat edge structures are more convenient to store, transport and install.

In a specific implementation, as shown in FIG3 , the width of the portion where the first reinforcing portion 51 covers the front plate 2 is W1, 5mm≤W1≤15mm. Specifically, it can be mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm or 15mm, or other values within the above range, which are not limited in this embodiment.

In this embodiment, if W1 is too small (for example, less than 5 mm), the total area covered by the first reinforcement portion 51 on the front panel 2 is too small, and the protection of the front panel 2 is insufficient, resulting in insufficient impact resistance of the front panel 2; if W1 is too large (for example, greater than 15 mm), the first reinforcement portion 51 will block the battery layer 1, reducing the light-receiving area of the battery layer 1, resulting in a decrease in the photoelectric conversion efficiency of the photovoltaic module.

Therefore, when the width W1 of the portion covered by the first reinforcement portion 51 on the front panel 2 is 5mm~15mm, the first reinforcement portion 51 can not only provide good protection for the front panel 2 to ensure that the impact resistance of the photovoltaic module is improved, but also prevent the first reinforcement portion 21 from blocking the battery layer 1 to ensure that the photovoltaic module has a higher photoelectric conversion efficiency.

In a specific embodiment, as shown in Figures 2 and 3, the first reinforcement portion 51 includes a covering layer 511 and an adhesive layer 512. Along the first direction Z, the covering layer 511 and the front panel 2 are respectively located on both sides of the adhesive layer 512, and the covering layer 511 is fixed to the light-facing surface of the front panel 2 through the adhesive layer 512.

The coating layer 511 can reduce the impact of external forces on the surface of the front panel 2, and improve the overall impact resistance of the front panel 2. The adhesive layer 512 covers the light-facing surface of the front panel 2, and its two side surfaces along its own height direction are respectively bonded to the coating layer 511 and the front panel 2 to achieve a fixed connection between the coating layer 511 and the front panel 2, ensuring a stable connection between the coating layer 511 and the front panel 2, and reducing the possibility of the coating layer falling off. The above structure can simplify the connection method between the coating layer 511 and the front panel 2, thereby simplifying the production and processing procedures of the photovoltaic module and reducing the production cost of the photovoltaic module.

In which, along the second direction X and/or the third direction Y, the size of the adhesive layer 512 should be equal to the size of the covering layer 511 to ensure the bonding effect between the covering layer 511 and the front panel 2.

Specifically, the material of the coating layer 511 is one or more of thermoplastic polyester elastomer (Thermo plastic Composites, TPC), thermoplastic polyolefin elastomer (Thermoplastic polyolefin, TPO), polyethylene terephthalate (Polyethylene Terephthalate, PET), polymethyl methacrylate (Polymethyl Methacrylate), polyvinyl chloride (Polyvinyl chloride, PVC), and ethylene propylene diene monomer (Ethylene Propylene Diene Monomer, EPDM).

The coating layer 511 made of the above materials has strong impact resistance and high weather resistance, which can not only improve the impact resistance of the photovoltaic module, but also extend the service life of the photovoltaic module in the outdoor environment. At the same time, the coating layer 511 made of the above materials also has the characteristics of small thickness and light weight, which can reduce the thickness of the photovoltaic module and reduce the weight of the photovoltaic module to achieve lightweight photovoltaic modules.

In addition, ultraviolet absorbers can be added to the material of the coating layer 511 to enhance the UV blocking capability of the photovoltaic module and slow down the aging of the film layer 4 and the back panel 3, thereby improving the weather resistance of the photovoltaic module and extending the service life of the photovoltaic module in outdoor environments.

Specifically, the ultraviolet absorber can be one or more of an organic ultraviolet absorber, an inorganic ultraviolet absorber, and an ultraviolet stabilizer. The organic ultraviolet absorber is one or more of a salicylate ultraviolet absorber, a benzophenone ultraviolet absorber, a benzotriazole ultraviolet absorber, a substituted acrylonitrile ultraviolet absorber, and a triazine ultraviolet absorber; the inorganic ultraviolet absorber is one or more of nano titanium dioxide, nano barium sulfate, nano zinc oxide, and nano cerium oxide; and the ultraviolet stabilizer is a hindered amine ultraviolet stabilizer.

As shown in Fig. 3, the thickness of the coating layer 511 is D1, 0.3 mm ≤ D1 ≤ 3 mm. Specifically, D1 may be 0.3 mm, 0.5 mm, 0.7 mm, 0.9 mm, 1 mm, 1.2 mm, 1.4 mm, 1.5 mm, 1.8 mm, 2 mm, 2.1 mm, 2.5 mm, 2.8 mm or 3 mm, or other values within the above range, which are not limited in this embodiment.

In this embodiment, if D1 is too small (for example, less than 0.3 mm), the coating layer 511 is too thin, which will lead to insufficient impact resistance of the coating layer 511. When the photovoltaic module is impacted, the coating layer 511 is easily damaged, and the effect of improving the impact resistance of the front panel 2 cannot be achieved; if D1 is too large (for example, greater than 3 mm), the coating layer 511 is too thick, which will cause the weight and volume of the reinforcement structure 5 to increase, making it inconvenient to install, which is not conducive to the lightweight of the photovoltaic module, and the overly thick coating layer 511 cannot continue to improve the impact resistance of the photovoltaic module.

Therefore, when the thickness D1 of the coating layer 511 is 0.3 mm to 3 mm, it can not only ensure that the impact resistance of the front panel 2 is improved, but also appropriately reduce the weight and volume of the photovoltaic module, thereby achieving lightweight photovoltaic modules.

As shown in Fig. 3, the thickness of the adhesive layer 512 is D2, 0.1 mm ≤ D2 ≤ 0.7 mm. Specifically, D2 may be 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm or 0.7 mm, or other values within the above range, which are not limited in this embodiment.

In this embodiment, if D2 is too small (for example, less than 0.1 mm), the bonding ability of the adhesive layer 512 will be insufficient, and the coating layer 511 will easily fall off. If D2 is too large (for example, greater than 0.7 mm), the overall thickness of the photovoltaic module will be too large, which is not conducive to the lightweight of the photovoltaic module, and the bonding effect of the coating layer 511 will not be significantly improved, which will also cause waste of materials.

Therefore, when the thickness D2 of the adhesive layer 512 is 0.1 mm to 0.7 mm, it can not only ensure stable bonding between the covering layer 511 and the front panel 2, but also appropriately reduce the thickness of the photovoltaic module, thereby achieving lightweight photovoltaic modules and avoiding material waste.

In a specific implementation, as shown in FIG3 , the thickness of the second reinforcement portion 52 is D3, 0 mm<D3≤10 mm. Specifically, D3 may be 0.1 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm or 10 mm, or other values within the above range, which are not limited in this embodiment.

In this embodiment, if D3 is too large (for example, greater than 10 mm), the second reinforcement portion 52 is too thick, which will cause the weight and volume of the second reinforcement portion 52 to increase, making it inconvenient to install and not conducive to the lightweight of the photovoltaic module. In addition, the overly thick reinforcement structure 5 cannot continue to improve the impact resistance of the photovoltaic module.

Specifically, the material of the adhesive layer 512 and the second reinforcing portion 52 may be the same as the material of the adhesive film layer 4 .

In this embodiment, the material of the adhesive layer 512 and the second reinforcement part 52 can be one or more of ethylene-vinyl acetate copolymer, polyolefin elastomer, polyvinyl butyral polyolefin. After the adhesive layer 512, the second reinforcement part 52 and the adhesive film layer 4 are heated and melted, the mutual bonding and fusion effect is good, that is, the reinforcement structure 5 can be bonded and fixed with the front plate 2, the adhesive film layer 4, the battery layer 1 and the back plate 3 through the lamination step, that is, the manufacturing process of the photovoltaic module can be simplified and the manufacturing efficiency of the photovoltaic module can be improved.

More specifically, as shown in FIG. 3 and FIG. 4 , the second reinforcing portion 52 may also be a structure formed by the flow fusion of the adhesive layer 512 and the adhesive film layer 4 in a molten state.

In a specific embodiment, as shown in FIG3 , there is a horizontal distance W2 between the edge of the battery layer 1 and the first reinforcement portion 51 , W2 ≥ 2 mm, specifically 2 mm, 2.3 mm, 2.5 mm, 2.7 mm, 2.9 mm or 3 mm, or other values within the above range, which is not limited in this embodiment.

As shown in Figure 3, the total thickness of the first reinforcement portion 51 in the first direction Z is H1, and H1 and W2 should satisfy H1:W2≤0.58, and can be specifically 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55 or 0.58, or other values within the above range, which is not limited in this embodiment.

If H1:W2 is too large (for example, greater than 0.58), the shadow of the first reinforcement part 51 will block the battery layer 1 (taking the sun's angle at 8 a.m. in mid-latitude areas as an example), thereby reducing the light-receiving area of the battery layer 1 and further reducing the photoelectric conversion efficiency of the photovoltaic module.

Therefore, W2 should not be too small, and the thickness D1 of the coating layer 511 and the thickness D2 of the adhesive layer 512 should not be too large to ensure that the shadows of the coating layer 511 and/or the adhesive layer 512 do not block the battery layer 1.

The embodiment of the present application also provides a method for manufacturing a photovoltaic module. As shown in FIG2 , the photovoltaic module includes a battery layer 1, a front plate 2, a film layer 4, a back plate 3 and a reinforcement structure 5. The film layer 4 includes a first film layer 41 and a second film layer 42. The reinforcement structure 5 includes a first reinforcement part 51 and a second reinforcement part 5. The manufacturing method can be used to manufacture the photovoltaic modules described in the above embodiments. As shown in FIG4 , the manufacturing method includes the following steps:

Step S1: Place the front plate 2 with its light-facing surface facing upward.

Step S2: Disposing a first reinforcing portion 51 on the light-facing surface of the front panel 2 .

Step S3: Turn over the front plate 2 and the first reinforcing portion 51 as a whole, so that the backlight surface of the front plate 2 faces upward.

In the above steps, the first reinforcing part 51 is first arranged on the light-facing surface of the front panel 2 to ensure that the first reinforcing part 51 can protect the edges of the front panel 2, thereby improving the impact resistance of the front panel 2. In addition, when the front panel 2 and the first reinforcing part 51 are turned over as a whole, the first reinforcing part 51 can also play a role of buffering and shock absorption under the front panel 2, thereby protecting the front panel 2 in the subsequent manufacturing process, reducing the risk of damage to the front panel 2, and helping to improve the yield rate of photovoltaic modules.

Step S4: Lay the first adhesive film layer 41 , the battery layer 1 , the second adhesive film layer 42 and the back plate 3 layer by layer on the backlight surface of the front plate 2 along the first direction Z to form a pre-laminated component.

In the above steps, laying the first adhesive film layer 41, the battery layer 1, the second adhesive film layer 42 and the back plate 3 layer by layer can ensure that each layer of the structure is placed at its preset position, thereby laying a good foundation for the subsequent lamination steps and facilitating improving the yield rate of photovoltaic modules.

When laying the battery layer 1, multiple battery cells need to be connected in series and parallel through busbar welding strips according to the circuit design, and through holes are opened on the second adhesive film layer 42 and the back plate 3 to facilitate the electrode leads of the battery layer 1 to pass through the through holes.

Step S5: laminating the pre-laminated member to form a second reinforcement portion 52 covering the side wall of the front plate 2 between the first reinforcement portion 51 and the first adhesive film layer 41 to form a photovoltaic module.

In the above steps, the first reinforcing part 51, the front panel 2, the first adhesive film layer 41, the battery layer 1, the second adhesive film layer 42 and the back panel 3 are bonded and fixed by the lamination step, thereby forming a complete photovoltaic module that can be used outdoors for a long time. On the one hand, through the lamination process, the first adhesive film layer 41 and the second adhesive film layer 42 can be fixedly bonded to both sides of the battery layer 1, ensuring that the battery layer 1 has good mechanical strength, reducing the impact of hail impact, wind blowing, mechanical vibration and the like, improving the sealing of the battery layer 1, and improving its anti-corrosion ability and safety. On the other hand, through the lamination process, the first reinforcing part 51 can be fixed to the light-facing surface of the front panel 2, thereby improving the impact resistance of the front panel 2. At the same time, along the first direction Z, a second reinforcing part 52 for protecting the side wall of the front panel 2 can be formed between the first reinforcing part 51 and the first adhesive film layer 41 to prevent the side wall of the front panel 2 from being scratched or bumped during transportation and installation. Therefore, the reinforcement structure 5 can form a wrapping protection for the edge of the front panel 2 together with the adhesive film layer 4 to enhance the impact resistance of the front panel 2, thereby achieving the effect of extending the service life of the photovoltaic module.

Specifically, after the pre-laminate is sent into the laminator of the laminator via a conveyor belt, the air in the pre-laminate is extracted by vacuuming to eliminate the bubbles in the pre-laminate, and then the pre-laminate is heated to melt the partial structure of the first reinforcement portion 51, the first adhesive film layer 41 and the second adhesive film layer 42, and the front panel 2, the battery layer 1 and the back panel 3 are bonded together.

During the lamination process, the pressure difference between the upper and lower chambers of the laminator is maintained at 0.06MPa~0.08MPa, and the melted first film layer 41 and the second film layer 42 can flow evenly under pressure to fill the gaps in the pre-laminated part. At the same time, the existence of pressure can make the cured first film layer 41 and the second film layer 42 more compact and have better mechanical properties, and can also laminate the adhesion between the first film layer 42, the second film layer 42 and the battery layer 1. The pressure difference between the upper and lower chambers of the laminator can be 0.06MPa, 0.065MPa, 0.07MPa, 0.075MPa or 0.08MPa, or other values within the above range, which is not limited in this embodiment.

In addition, before the pre-laminate enters the laminator, isolation Teflon cloth (polytetrafluoroethylene-coated glass fiber cloth) can be set on the upper and lower sides of the pre-laminate. The Teflon cloth has good high temperature resistance and non-adhesiveness, which can prevent the adhesive film from overflowing and sticking to the laminator, making it convenient to remove the laminate from the laminator and protecting the structural integrity of the finished laminate.

In a specific implementation, after step S4 and before step S5, the manufacturing method may further include: performing an electroluminescence (EL) test on the pre-laminated part.

In this embodiment, EL detection is used to detect defects in the pre-laminate as a whole and the battery cells inside it to determine whether the pre-laminate is qualified. Qualified pre-laminates can be sent to the laminator for lamination. If the battery cells have defects such as hidden cracks, black spots, cold solder joints, short circuits, etc., the damaged battery cells can be replaced before the lamination step, which is beneficial to improving the yield rate of photovoltaic modules, reducing material waste, and reducing the production cost of photovoltaic modules.

In a specific embodiment, the first reinforcing portion 51 includes a coating layer 511 and an adhesive layer 512, and the adhesive layer 512 is used to fix the coating layer 511 and the front plate 2. For step S2, the manufacturing method specifically includes:

Step A1: Laying an adhesive layer 512 on at least a portion of the light-facing surface of the front panel 2 .

In this step, an adhesive layer 512 is laid on the edges of the light-facing surface of the front plate 2 so that the coating layer 511 is bonded and fixed to the front plate 2. When the adhesive layer 512 is epoxy resin, acrylic resin or other glass fiber pre-impregnated resin material, the material itself has a certain viscosity, so the adhesive layer 512 can be bonded and fixed to the front plate 2 by its own viscosity. When the material of the adhesive layer 512 is one or more of ethylene-vinyl acetate copolymer, polyolefin elastomer, polyvinyl butyral polyolefin, it is necessary to use an electric soldering iron or other heating device to heat the adhesive layer 512 in the second direction X and/or the third direction Y at intervals, so that at least part of the adhesive layer 512 is melted and bonded and fixed to the front plate 2, thereby achieving pre-fixation between the adhesive layer 512 and the front plate 2, avoiding the displacement of the adhesive layer 512 in the subsequent steps S3 and S4, which is conducive to improving the yield rate of the photovoltaic module.

Step A2: Laying the covering layer 511 on the surface of the adhesive layer 512 away from the front plate 2 .

In this step, as shown in FIG6 , when the coating layer 511 is laid on the adhesive layer 512, the coating layers 511 on two adjacent sides can be connected by the high-temperature adhesive tape 6, so that the coating layers 511 on the four sides form a whole, and the coating layer 511 can also be pre-fixed with the front plate 2 by the high-temperature adhesive tape 6 (not shown in the figure) to avoid displacement of the coating layer 511 in the subsequent steps S3 and S4. This embodiment does not limit the pasting area of the high-temperature adhesive tape 6 in the above steps, and can be selected according to actual needs.

Specifically, in this embodiment, the width of the coating layer 511 and the adhesive layer 512 are both W3, and the raw materials can be pre-cut into strips with a width of W3+5 mm, and then the length can be cut according to the specific layout size of the photovoltaic module.

In a specific embodiment, along the second direction X and/or the third direction Y, the size of the first adhesive film layer 41 is greater than or equal to the size of the front panel 2. For step A1, the manufacturing method specifically includes: along the second direction X and/or the third direction Y, at least a portion of the adhesive layer 512 is extended to the outside of the front panel 2, so that the adhesive layer 512 and the first adhesive film layer 41 form a first accommodating space 10 in the first direction Z.

As shown in Figure 7, the size of the first film layer 41 is greater than or equal to the size of the front panel 2 and the edge of the adhesive layer 512 also extends to the outside of the front panel 2, so that a first accommodating space 10 surrounding the side wall of the front panel 2 is formed between the first film layer 41 and the adhesive layer 512, so that a second reinforcement portion 52 can be set at the first accommodating space 10.

Specifically, in step S5 , at least a portion of the adhesive layer 512 and/or at least a portion of the first adhesive film layer 41 can flow toward the first receiving space 10 in a molten state to form the second reinforcement portion 52 in the first receiving space 10 .

In the above steps, the adhesive layer 512 and the first film layer 41 are melted by heat and have a certain fluidity, so they can flow to the first accommodating space 10 and fill the first accommodating space 10 under pressure. After solidification, a second reinforcement portion 52 is formed. The second reinforcement portion 52 can protect the side walls of the front panel 2, thereby preventing the side walls of the front panel 2 from being scratched or damaged.

Specifically, the adhesive layer 512 can be made of the same material as the first adhesive film layer 41, so that the melting time and fluidity of the adhesive layer 512 and the first adhesive film layer 41 are consistent, the fusion between the two is better, and the performance and structure of the second reinforcement part 52 obtained by combining the two are more stable.

In a specific embodiment, for step S5, the lamination temperature is 140°C~155°C, specifically 140°C, 142°C, 145°C, 148°C, 150°C, 152°C, 154°C or 155°C, or other values within the above range, which is not limited in this embodiment.

If the lamination temperature is too low (for example, less than 140°C), the first film layer 41, the second film layer 42 and the adhesive layer 512 will not melt completely and have poor fluidity, resulting in insufficient bonding strength between the first film layer 41, the second film layer 42 and the adhesive layer 512, and bubbles will appear inside the finished photovoltaic module, affecting the performance of the photovoltaic module. If the lamination temperature is too high (for example, greater than 155°C), part of the cross-linking agent in the first film layer 41, the second film layer 42 and the adhesive layer 512 will decompose to produce oxygen, and the gas will not be easy to remove, resulting in bubbles in the photovoltaic module, and the degree of cross-linking of the material will be too high, causing the photovoltaic module to easily turn yellow and age during use.

Therefore, when the lamination temperature is 140° C. to 155° C., the bonding strength of the first adhesive film layer 41 , the second adhesive film layer 42 and the adhesive layer 512 can be ensured, and bubbles can be avoided inside the photovoltaic module, which is beneficial to improving the yield rate of the photovoltaic module.

In a specific implementation, before step S2 , the manufacturing method specifically includes: sticking a high temperature tape 6 on the light-facing surface of the front plate 2 , so that the high temperature tape 6 and the front plate 2 enclose a second accommodation space 20 for accommodating the first reinforcement portion 51 .

As shown in FIG8 , on the light-facing surface of the front panel 2, a high-temperature tape 6 is pasted inward at a distance W1 from the edge thereof, so that the high-temperature tape 6 forms a “mouth” shape on the front panel 2 (the high-temperature tapes 6 at adjacent long and short sides abut against each other but do not overlap) to form a second accommodating space 20 on the light-facing surface of the front panel 2, and the adhesive layer 512 and the covering layer 511 are both arranged in the second accommodating space 20.

On the one hand, the high-temperature tape 6 can play a limiting role in step S2, limiting the laying position of the adhesive layer 512 and the covering layer 511. On the other hand, the high-temperature tape 6 protects the front panel 2 and can also play a role in preventing glue overflow in step S5. After melting, the flowing adhesive layer 512 overflows onto the high-temperature tape 6 instead of flowing onto the front panel 2. In this way, you only need to tear off the high-temperature tape 6 after the lamination is completed, avoiding the situation where glue overflows on the front panel 2 and is inconvenient to clean.

Among them, the width of the high-temperature tape 6 can be 5mm~50mm, specifically 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm or 50mm, or other values within the above range, which is not limited in this embodiment.

If the width of the high temperature tape 6 is too small (for example, less than 5 mm), the glue may overflow through the high temperature tape 6 and flow to the front plate 2; if the width of the high temperature tape 6 is too large (for example, greater than 50 mm), it will cause material waste. Therefore, if the width of the high temperature tape 6 is 5 mm to 50 mm, it can ensure that the high temperature tape 6 has a good anti-overflow function and avoid material waste.

In addition, the high-temperature tape 6 should also have a certain structural strength to ensure that it is not easily broken when torn. Therefore, the thickness of the high-temperature tape 6 is preferably 0.05mm~1mm, specifically 0.05mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm, or other values within the above range, which is not limited in this embodiment.

In a specific implementation, as shown in FIG9 , after step S5, the manufacturing method further includes:

Step S6: Take the laminate out of the laminator and cool it to room temperature.

Step S7: removing excess glue from the edge of the laminate.

In this step, since the first film layer 41, the second film layer 42 and the adhesive layer 512 in a flowing state are compressed and extend outward to form burrs during the lamination process, it is necessary to cut off the excess glue on the edges of the laminate so that the edges of the first reinforcement part 51, the second reinforcement part 52, the film layer 4 and the back panel 3 are aligned in the first direction Z, which can ensure that the edges of the laminate are regular and flat, facilitating the storage, transportation and installation of photovoltaic modules.

Specifically, the excess glue can be removed by using a cutting machine or manually using a utility knife, which is not limited in this embodiment.

Step S8: Installing a junction box on the laminate.

In this step, a junction box is bonded to the light-facing surface or the backlight surface of the laminate, and the lead wire is electrically connected to the junction box to facilitate the connection between the photovoltaic module and other equipment or other photovoltaic modules.

After step S8, the photovoltaic modules need to be cured and cleaned. After step S6, before step S7, and after step S8, EL testing can be performed again to check whether the performance of the finished photovoltaic modules is qualified. At the same time, workers will also perform appearance inspection on the photovoltaic modules to ensure that the appearance of the photovoltaic modules is perfect.

The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A photovoltaic module, comprising: Battery layer (1); A front plate (2) arranged on the light-facing side of the battery layer (1); A back plate (3) arranged on the backlight side of the battery layer (1); An adhesive film layer (4), comprising a first adhesive film layer (41) located between the battery layer (1) and the front plate (2) and a second adhesive film layer (42) located between the battery layer (1) and the back plate (3); A reinforcement structure (5) for forming a wrap-around protection at the edge of the front panel (2), the reinforcement structure (5) comprising a first reinforcement portion (51) and a second reinforcement portion (52), the first reinforcement portion (51) covering a portion of the light-facing surface of the front panel (2), the first reinforcement portion (51) comprising a coating layer (511) and an adhesive layer (512), along a first direction, the coating layer (511) and the front panel (2) are respectively located on both sides of the adhesive layer (512), and the coating layer (511) is fixed to the light-facing surface of the front panel (2) via the adhesive layer (512); Along the second direction and/or the third direction, the size of the first adhesive film layer (41) is larger than the size of the front plate (2), a portion of the adhesive layer (512) extends to the outside of the front plate (2), and the adhesive layer (512) and the first adhesive film layer (41) form a first accommodation space (10) in the first direction; The adhesive layer (512) and the first adhesive film layer (41) are made of the same material, which is one or more of ethylene-vinyl acetate copolymer, polyolefin elastomer, polyvinyl butyral polyolefin, and at least a portion of the adhesive layer (512) and at least a portion of the first adhesive film layer (41) can flow toward the first accommodating space (10) in a molten state to form the second reinforcing portion (52) in the first accommodating space (10); the second reinforcing portion (52) covers the side wall of the front plate (2), and along the first direction, two ends of the second reinforcing portion (52) are respectively connected to the adhesive layer (512) and the first adhesive film layer (41); The first direction is the height direction of the photovoltaic component, the second direction is the width direction of the photovoltaic component, and the third direction Y is the length direction of the photovoltaic component. 2. The photovoltaic assembly according to claim 1, characterized in that edges of the first reinforcing portion (51), the second reinforcing portion (52), the adhesive film layer (4) and the back plate (3) are aligned in the first direction. 3. The photovoltaic assembly according to claim 1, characterized in that the width of the portion of the first reinforcement portion (51) covering the front plate (2) is W1, 5 mm ≤ W1 ≤ 15 mm. 4. The photovoltaic module according to claim 1, characterized in that the coating layer (511) has a thickness D1, 0.3 mm ≤ D1 ≤ 3 mm. 5. The photovoltaic module according to claim 1, characterized in that the material of the coating layer (511) is one or more of thermoplastic polyester elastomer, thermoplastic polyolefin elastomer, polyethylene terephthalate, polymethyl methacrylate, polyvinyl chloride, and ethylene propylene diene monomer rubber. 6. The photovoltaic module according to claim 1, characterized in that the thickness of the adhesive layer (512) is D2, 0.1 mm≤D2≤0.7 mm. 7. The photovoltaic assembly according to claim 1, characterized in that the thickness of the second reinforcement portion (52) is D3, 0 mm<D3≤10 mm. 8. A method for manufacturing a photovoltaic module, characterized in that the photovoltaic module comprises a battery layer (1), a front panel (2), an adhesive film layer (4), a back panel (3) and a reinforcing structure (5), wherein the adhesive film layer (4) comprises a first adhesive film layer (41) and a second adhesive film layer (42), the reinforcing structure (5) is used to form a wrapping protection on the edge of the front panel (2), the reinforcing structure (5) comprises a first reinforcing portion (51) and a second reinforcing portion (52), the first reinforcing portion (51) covers a portion of the front panel (2) facing the light, and the first reinforcing portion (51) comprises a coating layer (511) and an adhesive layer (512); Along the second direction and/or the third direction, the size of the first adhesive film layer (41) is larger than the size of the front plate (2), and the bonding layer (512), the second reinforcing portion (52) and the first adhesive film layer (41) are made of the same material, which is one or more of ethylene-vinyl acetate copolymer, polyolefin elastomer, polyvinyl butyral polyolefin; The production method comprises: Place the front plate (2) with the light-facing surface facing upwards; Laying the adhesive layer (512) on a partial area of the light-facing surface of the front panel (2), and extending part of the adhesive layer (512) to the outside of the front panel (2) along the second direction and/or the third direction; Laying the covering layer (511) on the surface of the adhesive layer (512) away from the front panel (2); turning the front panel (2) and the first reinforcing portion (51) over as a whole, so that the backlight surface of the front panel (2) faces upwards; The first adhesive film layer (41), the battery layer (1), the second adhesive film layer (42) and the back plate (3) are laid layer by layer on the backlight surface of the front plate (2) along a first direction to form a pre-laminated component, and the adhesive layer (512) and the first adhesive film layer (41) form a first accommodation space (10) in the first direction; The pre-laminated parts are laminated, so that at least part of the adhesive layer (512) and at least part of the first adhesive film layer (41) can flow in a molten state toward the first accommodating space (10), so as to form the second reinforcing portion (52) covering the side wall of the front panel (2) in the first accommodating space (10), so as to form the photovoltaic module; The first direction is a height direction of the photovoltaic component, the second direction is a width direction of the photovoltaic component, and the third direction is a length direction of the photovoltaic component. 9. The method for manufacturing a photovoltaic module according to claim 8, characterized in that when laying the adhesive layer (512) on a partial area of the light-facing surface of the front plate (2), the method specifically comprises: In the second direction and/or the third direction, the adhesive layer (512) is heated at intervals so that at least a portion of the adhesive layer (512) is fixedly connected to the front panel (2). 10. The method for manufacturing a photovoltaic module according to claim 8 or 9, characterized in that before arranging the first reinforcing portion (51) on the light-facing surface of the front plate (2), the method specifically comprises: A high temperature adhesive tape is adhered to the light-facing surface of the front plate (2), so that the high temperature adhesive tape and the front plate (2) enclose a second accommodation space (20) for accommodating the first reinforcement portion (51).