WO2023232136A1 - Lightweight imbricated photovoltaic assembly based on ultra-thin tempered glass - Google Patents

Abstract

The invention relates to the technical field of photovoltaic assemblies, and disclosed is a lightweight imbricated photovoltaic assembly based on ultra-thin tempered glass, comprising ultra-thin tempered glass, a first encapsulating layer, a battery assembly, a second encapsulating layer, a photovoltaic backplane, and an aluminum frame. The ultra-thin tempered glass comprises fully tempered glass, a dust-proof film, and an anti-reflection film. In the lightweight imbricated photovoltaic assembly based on ultra-thin tempered glass, by means of encapsulating the fully tempered glass on the surface of the photovoltaic assembly and providing the dust-proof film and the anti-reflection film on the upper and lower surfaces thereof, respectively, anti-dust and corrosion resistance capabilities as well as light transmittance of the photovoltaic assembly are increased. By means of fixing an assembly spacer at an intersection of two overlapping battery cells, under a supporting effect of the spacer, stress between the two adjacent battery cells and a conductive adhesive is reduced, such that the overlapping area of ​​the battery cells, i.e., a conductive adhesive coating area, can be as small as possible, increasing the light-receiving area of ​​the battery cells and reducing the usage amount of conductive adhesive to save costs while avoiding cracks and displacement of the battery cells.

Description

A lightweight shingled photovoltaic module based on ultra-thin tempered glass

This application requests the priority of the Chinese patent application submitted to the China Patent Office on June 4, 2022, with the application number 202210627000.9 and the invention title "A lightweight shingled photovoltaic module based on ultra-thin tempered glass", and its entire content incorporated herein by reference.

Technical field

The present invention relates to the technical field of photovoltaic modules, and in particular to a lightweight shingled photovoltaic module based on ultra-thin tempered glass.

Background technique

Shingled photovoltaic modules are a popular high-efficiency module in the industry. Different from the traditional packaging process, shingled photovoltaic modules are made by slicing the cells and connecting the cells into strings through special conductive adhesive. The main grid lines or back electrodes at the edges of both ends of the battery string are welded with a small amount of soldering tape, and then welded by the bus bar and the leaded soldering tape. This kind of component arranges the solar cells closely in a series and parallel structure, achieving front and rear There is no gap between the cells, which reduces the internal losses caused by the interconnection strips connecting the cells; moreover, more than 13% more cells can be placed in the same module area than conventional modules, greatly increasing the photoelectric conversion power of the module. Existing shingled photovoltaic modules have some shortcomings:

1. Some existing photovoltaic modules use transparent flexible films as front panels. As the service life of photovoltaic modules increases, dust is easy to accumulate on the surface of the transparent flexible films, resulting in poor light reception of the photovoltaic modules, or due to wind, rain, dust, etc. External factors corrode, causing damage to the flexible film, so that the inner panel cannot be effectively protected, resulting in poor power generation efficiency or even failure of normal power generation of the photovoltaic module, resulting in low photoelectric conversion efficiency.

2. In existing shingled photovoltaic modules, the front electrode of the first cell and the back electrode of the other cell are bonded together in a shingled structure through conductive adhesive to achieve current conduction between the cells. However, there is a certain area of overlap at the intersection of two adjacent battery sheets. If the width of the overlap area between the battery sheets is small and the contact area between the two adjacent battery sheets is too small, it will cause the local position of the battery sheet to have a large area. Stress can easily lead to cell cracks, and the small junction area between battery cells can easily cause the battery strings to shift due to bumps during packaging or transportation, causing the battery cells to separate and circuit; If the width of the overlapping area is large, it will occupy an excessively large light-receiving area of the cell and reduce the photoelectric conversion effect of the cell.

The Chinese patent application number CN201911046679.7 provides a cell sheet for a half-chip shingled photovoltaic module and a method for making the module. By changing the overlapping area between the cell slices in the half-chip shingled module into a wave Shape-shaped overlap to reduce the overlapping area of cell slices, achieve higher module power and better module reliability. However, the cells of this solution will still cause great obstruction to adjacent cells at the wavy peak position, and the overlapping area of the cells is not minimized.

The Chinese patent application number CN202020021194.4 discloses an electrical connection sheet suitable for shingled photovoltaic modules. By designing guide sheets and insulating sheets that fit into each other, the guide sheets are used to electrically connect adjacent cells. , the application of electrical connecting sheets in shingled photovoltaic modules can make the overlapping cells evenly stressed, reduce the height difference between adjacent cells, and avoid cracks in the cells when the cells are laminated later. problem, the yield rate is high. However, this solution can only improve the uniformity of force between two adjacent cells to prevent cracks, but the electrical connecting piece will cause greater obstruction to the lower cells.

The Chinese patent with application number CN202010699950.3 provides an encapsulation film and photovoltaic module, by setting multiple long strip-shaped protrusions arranged at intervals on the plane base layer. Thicken the buffer for cracks, fragments, broken grids, etc. However, the multiple long strip-shaped protrusions provided in this solution will greatly block the light-receiving surface of the cell, affecting the normal light reception of the cell.

Contents of the invention

In view of the shortcomings of the existing technology, the present invention provides a lightweight shingled photovoltaic module based on ultra-thin tempered glass, which has good dustproof and corrosion resistance on the surface of the shingled photovoltaic module, a small overlapping area of adjacent cells and no It has the advantages of causing cracks or displacement of cells, etc. It solves the problem of poor anti-erosion effect on the surface of existing shingled photovoltaic modules, and the overlapping area of adjacent cells is too small, which easily causes cracks or displacement of cells, and the problem of adjacent cells. Excessive overlapping area will occupy the light-receiving area of the cell.

In order to solve the above-mentioned problems, the surface layer of existing shingled photovoltaic modules has poor corrosion resistance, the overlapping area of adjacent cells is too small, which may easily cause cracks or displacement of the cells, and the overlapping area of adjacent cells is too large, which will occupy the light-receiving area of the cells. Technical problem, the present invention provides the following technical solutions:

A lightweight shingled photovoltaic component based on ultra-thin tempered glass, including ultra-thin tempered glass, a first encapsulation layer, a battery component, a second encapsulation layer, a photovoltaic backplane, and an aluminum frame. The ultra-thin tempered glass, the first The packaging layer, battery module, second packaging layer, and photovoltaic backsheet are laminated in sequence from top to bottom. Placed and packaged inside the aluminum frame;

The ultra-thin tempered glass includes fully tempered glass, a dustproof film and an anti-reflective film. The upper surface of the fully tempered glass is coated with a dustproof coating liquid to form the dustproof film to reduce dust accumulated on the surface of the fully tempered glass. , the lower surface of the fully tempered glass is coated with an anti-reflective coating liquid to form the anti-reflective film to increase the light transmittance of the fully tempered glass.

Preferably, the battery assembly includes a plurality of shingled battery strings, welding strips, and bus bars. The shingled battery string is composed of a plurality of battery sheets connected in series in a shingled structure. The third of each of the shingled battery strings is The welding ribbon is welded to one of the battery sheets and the last battery sheet respectively, and the bus bar is electrically connected to the welding ribbon located at the same end. A junction box is provided on the back of the photovoltaic backplane, and each of the The shingled battery strings are connected in series or parallel through the bus bars to form a circuit and are connected to the junction box.

Preferably, the battery assembly further includes conductive glue and pads. Two adjacent battery sheets in the shingled battery string are arranged obliquely and overlapped, and the two adjacent battery sheets are bonded by conductive glue. To form an electrical connection, the pad is fixedly assembled at the intersection of two adjacent battery sheets to support the two adjacent battery sheets.

Preferably, the pad is provided with a first plane, a second plane and a third plane, and the first plane, the second plane and the third plane are respectively adjacent to the interior of the shingled battery string. The back of the previous battery sheet, the end of the latter battery sheet and the back of the latter battery sheet among the two battery sheets are fixed and assembled by insulating glue.

Preferably, a positive electrode and a back electrode are respectively provided on the front side of one end of the battery sheet and the back side of the other end, and the first one of the two adjacent battery sheets in the shingled battery string is The back electrode surface and the positive electrode surface of the latter battery piece are fully covered and adhered through the conductive glue;

The welding strips are respectively welded to the positive electrode of one end battery sheet and the back electrode of the other end battery sheet of the shingled battery string.

Preferably, the first encapsulation layer includes a first glass fiber prepreg and a high-permeability EVA adhesive film, and the high-permeability EVA adhesive film is respectively encapsulated on the lower surface of the ultra-thin tempered glass and the first glass fiber prepreg. Between the upper surface of the prepreg, the lower surface of the first glass fiber prepreg and the battery component;

The second packaging layer includes a second fiberglass prepreg and a high cutoff EVA film. The high cutoff EVA film is respectively packaged between the battery component and the upper surface of the second glass fiber prepreg. between, between the lower surface of the second glass fiber prepreg and the upper surface of the photovoltaic backplane.

Preferably, the first fiberglass prepreg and the second fiberglass prepreg are formed by coating the surface of a fiberglass cloth substrate with resin and then hot pressing.

Preferably, the thickness of the fully tempered glass is less than 1.0mm.

Preferably, the photovoltaic backsheet is a PET composite backsheet or a PO copolymer backsheet.

Preferably, after the components are laminated, a >1mm edge of the composite material of the EVA and backsheet should be left unframed to ensure that the components are not damaged when subjected to impact.

Compared with the existing technology, the present invention provides a lightweight shingled photovoltaic module based on ultra-thin tempered glass, which has the following beneficial effects:

1. This lightweight shingled photovoltaic module based on ultra-thin tempered glass improves the corrosion resistance and strength of the photovoltaic module by encapsulating ultra-thin tempered glass on the surface of the photovoltaic module, and coats the fully tempered glass with a dust-proof coating liquid Form a dust-proof film to improve the chemical resistance of fully tempered glass, remove static electricity from the surface of fully tempered glass, and reduce dust adhesion. An anti-reflective film is formed by coating the lower surface of fully tempered glass with an anti-reflective coating liquid to reduce the reflection generated on the front and rear surfaces. Light interferes with each other to offset the reflected light and achieve an anti-reflection effect, thereby allowing sunlight to be transmitted to the surface of the battery component as much as possible to ensure the photoelectric conversion efficiency of the battery component.

2. This lightweight shingled photovoltaic module based on ultra-thin tempered glass sets pads at the intersection of two adjacent cells in each group of shingled cell strings. The pads can stably support the two adjacent cells. , to prevent the battery modules from being displaced due to external impact during packaging or transportation, causing the cells to separate and circuit, causing the photovoltaic modules to be unable to generate electricity normally, and the pads are made of insulating material, which will not affect the current conduction between the cells.

3. This lightweight shingled photovoltaic module based on ultra-thin tempered glass sets pads at the intersection of two adjacent cells in each group of shingled cell strings. Under the support of the pads, the two adjacent cells The reduced stress between the conductive adhesive and the conductive adhesive can prevent cracks between two adjacent cells due to excessive local pressure at the conductive adhesive adhesion, and improve the service life of the cells.

4. This lightweight shingled photovoltaic module based on ultra-thin tempered glass sets spacers at the intersection of two adjacent cells in each group of shingled cell strings, so that the cells on the lower side of the two adjacent cells are The sheet does not need to carry the battery sheet on the upper side only through conductive adhesive. The conductive adhesive only needs to just cover the back electrode of the previous battery sheet and the positive electrode surface of the following battery sheet to achieve electrical connection, thereby minimizing the Minimizes the overlapping area of two adjacent cells, increasing battery The light-receiving area of the film is reduced and the amount of conductive adhesive is reduced to save costs.

5. This lightweight shingled photovoltaic module based on ultra-thin tempered glass is encapsulated with an EVA film on the surface of the glass fiber prepreg to form an encapsulation layer, which effectively increases the impact resistance and strength of the photovoltaic module. It is encapsulated with a high-permeability EVA film Melt bonding and cross-linking solidification occur on the surface of ultra-thin tempered glass and the first glass fiber prepreg, which improves the light transmittance of photovoltaic modules. Through the high cut-off EVA film, the UV aging resistance of photovoltaic modules is improved, improving the use of photovoltaic modules. life.

Instructions with pictures

Figure 1 is an explosion schematic diagram of the present invention;

Figure 2 is a schematic cross-sectional structural diagram of the ultra-thin tempered glass of the present invention;

Figure 3 is a partial cross-sectional structural schematic diagram of some components of the present invention;

Figure 4 is a schematic cross-sectional partial structural diagram of the battery module of the present invention.

Symbol Description:
1. Ultra-thin tempered glass; 11. Fully tempered glass; 12. Dust-proof film; 13. Anti-reflective film; 2.
The first packaging layer; 21. The first glass fiber prepreg; 22. Highly transparent EVA film; 3. Battery components; 31. Cell sheets; 311. Positive electrode; 312. Back electrode; 32. Soldering ribbon; 33. Bus bar; 34, conductive glue; 35, pad; 351, first plane; 352, second plane; 353, third plane; 4, second encapsulation layer; 41, second glass fiber prepreg; 42, High cut-off EVA film; 5. Photovoltaic backplane; 6. Frame; 7. Junction box.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Please refer to Figure 1 and Figure 2. A lightweight shingled photovoltaic module based on ultra-thin tempered glass includes ultra-thin tempered glass 1, a first encapsulation layer 2, a battery component 3, a second encapsulation layer 4, and a photovoltaic backsheet 5 , Aluminum frame 6, ultra-thin tempered glass 1, first packaging layer 2, battery module 3, second packaging layer 4, photovoltaic backplane 5 are laminated in sequence from top to bottom and packaged inside the aluminum frame 6.

The ultra-thin tempered glass 1 includes fully tempered glass 11, a dustproof film 12 and an anti-reflective film 13. The upper surface of the fully tempered glass 11 is coated with a dustproof coating liquid to form a dustproof film 12 to reduce the impact of the fully tempered glass. The dust accumulated on the surface of the fully tempered glass 11 is improved by the dust-proof film 12 to improve the chemical resistance of the fully tempered glass 11, remove the static electricity on the surface of the fully tempered glass 11, and reduce dust adhesion; the lower surface of the fully tempered glass 11 is coated with an anti-reflective coating liquid to form an anti-reflective film 13 In order to increase the light transmittance of the fully tempered glass 11, the reflected light generated by the front and rear surfaces of the anti-reflection film 13 interferes with each other to offset the reflected light, thereby achieving the anti-reflection effect, so that sunlight can be transmitted to the surface of the battery module 3 as much as possible, and then Improve the photoelectric conversion efficiency of the battery component 3.

Please refer to Figure 1. Further, the battery assembly 3 includes a plurality of shingled battery strings, welding strips 32, and bus bars 33. The shingled battery string is composed of a plurality of battery sheets 31 connected in series in a shingled structure. Each shingled battery string has Welding strips 32 are welded to the first cell piece 31 and the last cell piece 31 respectively. The bus bar 33 is electrically connected to the welding strip 32 located at the same end. A junction box 7 is provided on the back of the photovoltaic backplane 5. Each shingled cell string The bus bars 33 are connected in series or parallel to form a circuit and connected to the junction box 7. The solar photovoltaic modules are connected and protected through the junction box 7. The leads of the junction box 7 extend to the outside of the aluminum frame 6, and the battery module 3 receives solar energy through the leads. The converted current is conducted to external circuits.

Further, please refer to Figure 3. The battery assembly 3 also includes a conductive adhesive 34 and a spacer 35. Two adjacent battery sheets 31 in the shingled battery string are arranged obliquely and overlapped, and the adjacent two battery sheets 31 are separated by a conductive adhesive. 34 are adhered to form an electrical connection. The pad 35 is fixedly assembled at the junction of two adjacent battery sheets 31 to support the two adjacent battery sheets 31, so that the two adjacent batteries are supported by the pad 35. The stress between the surface of the sheet 31 and the conductive adhesive 34 is reduced, and the battery sheet 31 located on the lower side of the two adjacent battery sheets 31 does not need to support the battery sheet 31 located on the upper side only through the adhesion area of the conductive adhesive 34, and thus It can effectively prevent cracks between two adjacent battery sheets 31 due to excessive local pressure at the adhesion area of the conductive adhesive 34, and the adhesion area of the conductive adhesive 34 can complete the electrical connection of the two adjacent battery sheets 31. Minimize as much as possible, thereby minimizing the overlapping area of two adjacent cell sheets 31, increasing the light-receiving area of the cell sheet 31 and reducing the amount of conductive adhesive 34 to save costs and effectively improve the photoelectric conversion effect of the battery assembly 3. Specifically, the material of the pad 35 is an insulating material.

Please refer to Figure 4. The pad 35 is provided with a first plane 351, a second plane 352 and a third plane 353. The first plane 351, the second plane 352 and the third plane 353 are respectively connected with two adjacent planes in the shingled battery string. Among the battery sheets 31, the back of the previous battery sheet 31, the end of the subsequent battery sheet 31 and the back of the subsequent battery sheet 31 are fixed and assembled by insulating glue, so that the spacer block 35 can Each battery piece 31 is stably supported to prevent the battery assembly 3 from being displaced due to bumps during packaging or transportation.

Please refer to Figure 4. A positive electrode 311 and a back electrode 312 are respectively provided on the front of one end of the battery sheet 31 and on the back of the other end. The back of the previous battery sheet 31 among the two adjacent battery sheets 31 in the shingled battery string is The surface of the electrode 312 and the surface of the positive electrode 311 of the next battery piece 31 are fully covered and adhered by the conductive glue 34. Therefore, in practical applications, the conductive glue 34 applied between two adjacent battery pieces 31 only needs to cover the front surface. The back electrode 312 of one battery piece 31 and the surface of the positive electrode 311 of the next battery piece 31 can realize the electrical connection between two adjacent battery pieces 31 and use as little conductive glue 34 as possible.

The welding ribbons 32 are respectively welded to the positive electrode 311 of one end cell sheet 31 and the back electrode 312 of the other end cell sheet 31 of the shingled battery string.

Further, please refer to Figure 1. The first encapsulation layer 2 includes a first glass fiber prepreg 21 and a high-transparency EVA adhesive film 22. The high-transparent EVA adhesive film 22 is respectively encapsulated on the lower surface of the ultra-thin tempered glass 1 and the first glass. Between the upper surface of the fiber prepreg 21, between the lower surface of the first fiberglass prepreg 21 and the battery module 3, the ultra-thin tempered glass 1 and the first fiberglass prepreg 21 are encapsulated through a high-transparency EVA film 22 The surface is melted, bonded, cross-linked and solidified, becoming completely transparent, effectively improving the light transmittance of the photovoltaic module. Specifically, the first glass fiber prepreg 21 has high light transmittance.

The second encapsulation layer 4 includes a second glass fiber prepreg 41 and a high cutoff EVA adhesive film 42. The high cutoff EVA adhesive film 42 is respectively encapsulated between the battery module 3 and the upper surface of the second glass fiber prepreg 41. Between the lower surface of the fiberglass prepreg 41 and the upper surface of the photovoltaic backplane 5, the high cutoff EVA film 42 is a UV cutoff EVA film or a white EVA film, which has high UV aging resistance and can extend the service life of the photovoltaic module. Specifically, the second glass fiber prepreg 41 may be translucent or may be translucent, and may be a material of any color.

The first fiberglass prepreg 21 and the second fiberglass prepreg 41 are made by using fiberglass cloth as a base material, coating the required resin on the surface and curing it at high temperature. The cooled fiberglass prepreg is cut into The first glass fiber prepreg 21 and the second glass fiber prepreg 41 can be obtained in the required sizes. The glass fiber prepreg can be used to increase the impact resistance and composite strength of the photovoltaic module, and combine ultra-thin tempered glass 1 and high transparency. EVA film 22, first glass fiber prepreg 21, high permeability EVA film 22, battery module 3, high cutoff EVA film 42, second glass fiber prepreg 41, high cutoff EVA film 42 and photovoltaic back The plates 5 are laminated sequentially at a temperature of 130°C to 160°C and a pressure of -80MPa to -10MPa to form a shingled photovoltaic module.

After the components are laminated, leave >1mm of the composite edge of EVA and backplane without framing to ensure that the components are not damaged when impacted.

Specifically, the process used to coat the surface of fiberglass cloth with resin can be solution impregnation technology, suspension impregnation technology, powder impregnation technology or melt coating technology. The resin can be high-permeability epoxy resin, acrylate, other saturated resin or Unsaturated resin.

Specifically, both the high-permeability EVA adhesive film 22 and the high-cutoff EVA adhesive film 42 can add only a first layer of EVA adhesive film, only a second layer of EVA adhesive film, or neither layer according to design requirements.

Further, please refer to Figure 2. The thickness of the fully tempered glass 11 is less than 1.0 mm to facilitate physical cutting during production and installation.

Further, please refer to Figure 1. The photovoltaic backsheet 5 is a PET composite backsheet or PO copolymer backsheet. Specifically, the photovoltaic backsheet 5 may be made of white, black or other colored materials.

Working principle: When producing lightweight shingled photovoltaic modules based on ultra-thin tempered glass, the upper surface of the fully tempered glass 11 is coated with a dust-proof coating liquid to form a dustproof film 12 to reduce dust adhesion, and the lower surface of the fully tempered glass 11 is coated with a dust-proof coating liquid. The anti-reflective coating liquid is coated to form an anti-reflective film 13 to increase the total light transmittance; the battery cells 31 are connected in series in a shingled structure to form a shingled battery string, and each shingled battery string is connected in parallel through the welding ribbon 32 and the bus bar 33 to form a series-parallel circuit. into the junction box 7, and the current converted by the battery module 3 receiving solar energy is conducted to the external circuit through the leads of the junction box 7; during packaging, the ultra-thin tempered glass 1, the first packaging layer 2, the battery module 3, the second The encapsulation layer 4 and the photovoltaic backsheet 5 are laminated from top to bottom at a temperature of 130°C to 160°C and a pressure of -80MPa to -10MPa, and are packaged inside the aluminum frame 6 to form a shingled photovoltaic module.

A pad 35 made of insulating material is provided at the intersection of two adjacent battery sheets 31 of each group of shingled battery strings. The first plane 351, the second plane 352 and the third plane 353 of the pad 35 are respectively in contact with the shingled battery strings. Among the two adjacent battery sheets 31, the back of the previous battery sheet 31, the end of the subsequent battery sheet 31 and the back of the subsequent battery sheet 31 are fixed and assembled with insulating glue to realize the contact between the pad 35 and the two adjacent battery sheets 31. The stable support reduces the stress between the surfaces of two adjacent battery cells 31 and the conductive adhesive 34, prevents the two adjacent battery cells 31 from cracking due to excessive local pressure, and can reduce the adhesion area of the conductive adhesive 34. area to increase the light-receiving area of the cell 31.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, and substitutions can be made to these embodiments without departing from the principles and spirit of the invention. and modifications, the scope of the present invention is determined by the appended claims and the like. Same thing limited.

Claims (10)

A lightweight shingled photovoltaic module based on ultra-thin tempered glass, characterized by including ultra-thin tempered glass (1), a first encapsulation layer (2), a battery component (3), a second encapsulation layer (4), Photovoltaic backplane (5), aluminum frame (6); the ultra-thin tempered glass (1), first packaging layer (2), battery component (3), second packaging layer (4), photovoltaic backplane (5 ) are laminated sequentially from top to bottom and packaged inside the aluminum frame (6); The ultra-thin tempered glass (1) includes fully tempered glass (11), a dustproof film (12) and an anti-reflective film (13). The upper surface of the fully tempered glass (11) is formed by coating a dustproof coating liquid. The dust-proof film (12) is used to reduce dust accumulated on the surface of the fully tempered glass (11), and the anti-reflective film (13) is formed on the lower surface of the fully tempered glass (11) by coating an anti-reflective coating liquid to increase the The light transmittance of the fully tempered glass (11). A lightweight shingled photovoltaic module based on ultra-thin tempered glass according to claim 1, characterized in that the battery module (3) includes a plurality of shingled battery strings, welding ribbons (32), bus bars ( 33). The shingled battery string is composed of a plurality of battery sheets (31) connected in series in a shingled structure. The first battery sheet (31) and the last battery of each shingled battery string are The welding strips (32) are respectively welded to the sheets (31), the bus bars (33) are electrically connected to the welding strips (32) located at the same end, and wiring is provided on the back of the photovoltaic backplane (5). box (7), each of the shingled battery strings is connected in series or parallel through the bus bar (33) to form a circuit and is connected to the junction box (7). A lightweight shingled photovoltaic module based on ultra-thin tempered glass according to claim 2, characterized in that the battery module (3) further includes conductive glue (34) and pads (35), and the laminated Two adjacent battery sheets (31) in the battery string are arranged obliquely and overlapped, and the two adjacent battery sheets (31) are adhered to each other through conductive glue (34) to form an electrical connection relationship. The spacer block (35) is fixedly assembled at the junction of two adjacent battery sheets (31) to support the two adjacent battery sheets (31). A lightweight shingled photovoltaic module based on ultra-thin tempered glass according to claim 3, characterized in that the pad (35) is provided with a first plane (351), a second plane (352) and The third plane (353), the first plane (351), the second plane (352) and the third plane (353) are respectively connected with the two adjacent battery sheets in the shingled battery string. In (31), the back of the previous battery sheet (31), the end of the subsequent battery sheet (31) and the back of the subsequent battery sheet (31) are fixed and assembled by insulating glue. A lightweight shingled photovoltaic group based on ultra-thin tempered glass according to claim 3 It is characterized in that a positive electrode (311) and a back electrode (312) are respectively provided on the front of one end of the battery sheet (31) and the back of the other end, and two adjacent ones in the shingled battery string are The conductive glue (34) is passed between the back electrode (312) surface of the previous battery sheet (31) and the positive electrode (311) surface of the subsequent battery sheet (31) among the battery sheets (31). ) for full coverage adhesion; The welding strips (32) are respectively welded to the positive electrode (311) of one end cell sheet (31) and the back electrode (312) of the other end cell sheet (31) of the shingled battery string. A lightweight shingled photovoltaic module based on ultra-thin tempered glass according to claim 1, characterized in that the first encapsulation layer (2) includes a first glass fiber prepreg (21) and highly transparent EVA Adhesive film (22), the high-permeability EVA adhesive film (22) is respectively packaged between the lower surface of the ultra-thin tempered glass (1) and the upper surface of the first glass fiber prepreg (21), the between the lower surface of the first glass fiber prepreg (21) and the battery component (3); The second packaging layer (4) includes a second glass fiber prepreg (41) and a high cutoff EVA film (42). The high cutoff EVA film (42) is respectively packaged in the battery component (3). and between the upper surface of the second glass fiber prepreg (41), and between the lower surface of the second glass fiber prepreg (41) and the upper surface of the photovoltaic backsheet (5). A lightweight shingled photovoltaic module based on ultra-thin tempered glass according to claim 6, characterized in that the first glass fiber prepreg (21) and the second glass fiber prepreg (41 ) are formed by coating the surface of fiberglass cloth substrate with resin and then hot pressing. A lightweight shingled photovoltaic module based on ultra-thin tempered glass according to claim 1, characterized in that the thickness of the fully tempered glass (11) is less than 1.0 mm. A lightweight shingled photovoltaic module based on ultra-thin tempered glass according to claim 1, characterized in that the photovoltaic backsheet (5) is a PET composite backsheet or a PO copolymer backsheet. A lightweight shingled photovoltaic module based on ultra-thin tempered glass according to claim 1, characterized in that after the module is laminated, the edges of the composite material of EVA and backsheet of >1 mm are retained without framing. , to ensure that the components are not damaged when subjected to impact.