CN209766440U

CN209766440U - HIT double-sided double-glass photovoltaic assembly

Info

Publication number: CN209766440U
Application number: CN201821734528.1U
Authority: CN
Inventors: 惠祺; 季军义; 顾海峰; 顾丽萍; 常宇峰
Original assignee: Jiangsu Rainbow Wing New Energy Co Ltd
Current assignee: Jiangsu Rainbow Wing New Energy Co Ltd
Priority date: 2018-10-25
Filing date: 2018-10-25
Publication date: 2019-12-10
Anticipated expiration: 2028-10-25

Abstract

The utility model provides a HIT double-sided dual-glass photovoltaic module, including preceding glass, first encapsulating material layer, two-sided HIT battery, second encapsulating material layer, back glass and terminal box, preceding glass, first encapsulating material layer, two-sided HIT battery, second encapsulating material layer and back glass distribute from last to down in proper order, the terminal box is installed in back glass border position department. The utility model discloses increase the extinction ratio of battery, realized the high power output of the positive and negative two sides of subassembly, specifically do: the generated energy is improved, the reliability is high, and the service life is long.

Description

HIT double-sided double-glass photovoltaic assembly

Technical Field

The utility model relates to a crystalline silicon solar module makes technical field, in particular to HIT double-sided dual-glass photovoltaic module.

Background

the solar energy industry is developing vigorously worldwide as a low-carbon renewable energy source, and the installation amount of each country is increased year by year. There are now a great many cases of installing photovoltaic systems on the ground and on various types of roofs. For various types of buildings, the photovoltaic products with the power generation function are installed, so that the power consumption of the buildings can be reduced, the effects of energy conservation and emission reduction are achieved, and meanwhile, economic benefits are brought to the building owners and system installation users, so that the photovoltaic solar energy generation system has great popularization value.

the silicon solar cell with the HIT structure is characterized in that a layer of undoped (intrinsic) hydrogenated amorphous silicon thin film is added between P-type hydrogenated amorphous silicon, n-type hydrogenated amorphous silicon and an n-type silicon substrate, and the performance of a PN junction is changed after the technical measures are taken. Thus, the conversion efficiency reaches 20%, the open-circuit voltage reaches 719 mV, and the whole process can be realized below 200 ℃.

the generated energy of the HIT solar cell calculated according to unit area keeps the world leading level. HIT has the characteristics of low preparation process temperature, high conversion efficiency, good high-temperature characteristic and the like, and is a low-price high-efficiency battery. The higher conversion efficiency of the HIT means that it has advantages comparable to those of conventional crystalline silicon solar cells.

the existing solar photovoltaic products adopt silicon crystal cells, the cells need a large amount of silicon wafers, the cost is extremely high, and the synthesis of the silicon wafers needs a large amount of energy and is not environment-friendly; the utility model discloses a HIT double-sided dual-glass photovoltaic module has improved dual-glass photovoltaic module's power. The photovoltaic module is sequentially composed of a first glass cover plate, EVA (ethylene vinyl acetate), a solar cell, EVA and a 5-layer structure of a second glass cover plate from top to bottom, and the conversion efficiency of the HIT cell is greater than 20% of that of the traditional cell; the efficiency temperature coefficient is lower (less than 0.3%/DEG C), and the battery piece works more efficiently in a high-temperature environment; compared with the traditional crystalline silicon battery, the HIT solar photovoltaic battery is relatively more environment-friendly; since the thickness can be reduced, a small amount of silicon is used. Since a considerable amount of energy is actually required for manufacturing a silicon wafer or the like, the thinness is also an important factor. In view of this, HIT solar photovoltaic cells are the best choice if a more environmentally friendly approach is pursued. For companies, it is also effective to reduce the manufacturing cost to realize the ultra-thinness of the HIT solar photovoltaic cell unit. From the viewpoint of cost, in a crystalline silicon solar cell unit such as an HIT solar photovoltaic cell, the proportion of silicon wafers in the total cost is very large, and thinning the thickness is an important point for reducing the cost.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect of with high costs, not environmental protection among the prior art, the utility model provides a HIT double-sided dual-glass photovoltaic module.

In order to achieve the above object, the present invention provides the following technical solutions:

The utility model provides a HIT double-sided dual-glass photovoltaic module, includes preceding glass, first encapsulating material layer, two-sided HIT battery, second encapsulating material layer, back glass and terminal box, preceding glass, first encapsulating material layer, two-sided HIT battery, second encapsulating material layer and back glass distribute from last to down in proper order, the terminal box is installed in back glass border position department.

preferably, the front glass and the rear glass are made of ultra ~ white embossed high ~ transmittance tempered glass with light transmittance of more than 94%, and the thickness of the ultra ~ white embossed high ~ transmittance tempered glass is 1.8 ~ 3.2 mm.

preferably, the material of the first encapsulating material layer and the second encapsulating material layer is POE.

Preferably, the double-sided HIT battery consists of six battery strings, and each battery string consists of ten battery pieces.

preferably, the distance between adjacent battery pieces in the battery string is 2.2 ~ 2.4mm, and the distance between the battery strings is 2 +/~ 0.5 mm.

A processing method of an HIT double-sided double-glass photovoltaic assembly comprises the following processing steps:

1) Welding: welding the battery pieces into a battery string;

2) Laminating: laminating the front glass, the first packaging material layer, the double-sided HIT battery, the second packaging material layer and the rear glass in sequence;

3) Edge sealing: sealing the periphery of the stacked components by using edge sealing adhesive tapes;

4) Laminating: laminating in a laminating machine, wherein the laminating process is divided into three sections;

5) A junction box: after the components are cooled after lamination and the like, tearing off the edge sealing adhesive tape at the periphery of the components, and connecting a wire box at the lead;

6) Packaging and warehousing: and packaging and warehousing after the detection is finished.

preferably, in the step 1), one battery string is composed of battery pieces, the distance between two adjacent battery pieces is 2.2 ~ 2.4mm, and the welding temperature is 330 ~ 350 ℃.

Preferably, the specific process of stacking in step 2) is as follows:

firstly, placing front glass on a laminating table, wherein the suede of the glass faces upwards;

Secondly, laying the first packaging material layer on the front glass in a suede manner upwards, and laying the first packaging material layer in the middle;

placing a laminated template, aligning three edges of the laminated template with three edges of the front glass, placing six battery strings according to the polarity marks on the template, wherein the space between the battery strings is 2 +/-0.5 mm;

fixing the battery strings by adopting a high-temperature adhesive tape, wherein the length of the adhesive tape is 25mm +/-5 mm, the long edge of the adhesive tape is perpendicular to the main grid line, and the adhesive tape is pasted in the middle by taking the seam as the center;

Placing the bus bars, welding the middle short bus bar, welding the outer long bus bar, placing the bus bars in place, welding the bus bars for more than or equal to 2S, setting the soldering iron temperature to 380 +/-10 ℃, and removing the template after the welding is completed;

Pasting a bar code on the battery piece;

Placing a second packaging material layer and rear glass, and sticking a bar code on the rear glass;

and the POE small blocks are additionally arranged at the four corners and the leading wires of the assembly and are used for preventing bubbles from being produced after lamination.

preferably, in the third step, the grid line surface of the battery on the battery string is a negative electrode, and the aluminum back surface is a positive electrode.

preferably, the laminating temperature in the step 4) is 140 ~ 150 ℃, the vacuumizing time is 650 ~ 700S, wherein the pressure and time of the three ~ stage laminating process are respectively 90S/~ 60kPa for laminating for a period of time/pressure, 90S/~ 50kPa for laminating for a second period of time/pressure, and 720S/~ 20kPa for laminating for a third period of time/pressure.

The utility model discloses the beneficial effect who brings is: the light absorption rate of the battery is increased, and high-power output of the front side and the back side of the component is realized; the method specifically comprises the following steps:

the power generation is improved, namely the power generation is increased by ~ 30% compared with a single-side power generation assembly after additional power generation is carried out on the back side;

High reliability: the double-layer glass structure can enhance the anti-hidden cracking capability in transportation and has zero water permeability, and has the characteristics of UV aging resistance and degradation corrosion resistance compared with the traditional back plate;

long service life: the quality of the single-sided dual-glass component is kept for 30 years, and the quality of the common component is kept for 20 years.

drawings

fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 shows the arrangement of the battery cells according to the present invention.

fig. 3 is an enlarged schematic view of the structure at a in fig. 2.

Reference numbers in the figures:

1. a front glass; 2. a first layer of encapsulation material; 3. a double-sided HIT cell; 4. a second layer of encapsulation material; 5. rear glass; 6. a junction box.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

as shown in fig. 1-3, an HIT double-sided double-glass photovoltaic module comprises a front glass 1, a first packaging material layer 2, a double-sided HIT battery 3, a second packaging material layer 4, a rear glass 5 and a junction box 6, wherein the front glass 1, the first packaging material layer 2, the double-sided HIT battery 3, the second packaging material layer 4 and the rear glass 5 are sequentially distributed from top to bottom, the junction box 6 is installed at the edge position of the rear glass 5, and the junction box 6 adopting an edge installation mode realizes that the back of the module is free of shielding and does not influence the power generation of a back battery.

the front glass 1 and the rear glass 5 are made of ultra ~ white embossed high ~ transmittance toughened glass with light transmittance of more than 94%, and the thickness of the ultra ~ white embossed high ~ transmittance toughened glass is 1.8 ~ 3.2 mm.

The first packaging material layer 2 and the second packaging material layer 4 are made of POE.

1) Welding: welding the battery pieces into a battery string;

2) Laminating: the front glass 1, the first packaging material layer 2, the double-sided HIT battery 3, the second packaging material layer 4 and the rear glass 5 are laminated in sequence;

in the step 1), one battery string consists of battery pieces, the distance between every two adjacent battery pieces is 2.2 ~ 2.4mm, and the welding temperature is 330 ~ 350 ℃.

The specific process of the lamination in the step 2) is as follows:

Firstly, placing front glass 1 on a laminating table, wherein the suede of the glass faces upwards;

Secondly, the first packaging material layer 2 is flatly laid on the front glass 1 in a suede mode upwards and is laid in the middle;

placing a laminated template, aligning three edges of the laminated template with three edges of the front glass 1, placing six battery strings according to the polarity marks on the template, wherein the space between the battery strings is 2 +/-0.5 mm;

fixing the battery strings by adopting a high-temperature adhesive tape, wherein the length of the adhesive tape is 25mm +/-5 mm, the long edge of the adhesive tape is perpendicular to the main grid line, the adhesive tape is pasted in the middle by taking the seam as the center, the battery pieces are not allowed to deviate to one side, the adhesive tape needs to be smoothed, and the phenomena of wrinkles, bubbles and tilting cannot occur;

Sixthly, sticking a bar code on the battery piece, wherein the bar code is stuck at the edge of the battery piece as shown in figure 3;

placing a second packaging material layer 4 and a rear glass 5, and pasting a bar code on the rear glass 5;

and in the third step, the grid line surface of the battery on the battery string is a negative electrode, and the aluminum back surface is a positive electrode.

the laminating temperature in the step 4) is 140 ~ 150 ℃, the vacuumizing time is 650 ~ 700S, wherein the pressure and the time of the three ~ stage laminating process are respectively 90S/~ 60kpa for a laminating period of time/pressure, 90S/~ 50kpa for a laminating period of time/pressure, and 720S/~ 20kpa for a laminating period of time/pressure.

the above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can be covered within the protection scope of the present invention without the changes or substitutions thought by the inventive work within the technical scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims

1. The utility model provides a HIT double-sided double-glass photovoltaic module, its characterized in that, includes preceding glass (1), first encapsulating material layer (2), two-sided HIT battery (3), second encapsulating material layer (4), back glass (5) and terminal box (6), preceding glass (1), first encapsulating material layer (2), two-sided HIT battery (3), second encapsulating material layer (4) and back glass (5) distribute from last to down in proper order, terminal box (6) are installed in back glass (5) border position department.

2. the HIT double ~ sided double ~ glass photovoltaic assembly as claimed in claim 1, wherein the front glass (1) and the rear glass (5) are made of ultra ~ white embossed high ~ transmittance tempered glass with a light transmittance of 94% or more, and the thickness of the ultra ~ white embossed high ~ transmittance tempered glass is 1.8 ~ 3.2 mm.

3. the HIT double-sided double-glass photovoltaic module according to claim 1 or 2, wherein the material of the first encapsulant layer (2) and the second encapsulant layer (4) is POE.

4. The HIT double-sided double-glass photovoltaic module according to claim 1, wherein the double-sided HIT cell (3) is composed of six cell strings, each of which is composed of ten cells.

5. the HIT double ~ sided double ~ glass photovoltaic assembly as claimed in claim 4, wherein the distance between adjacent cells in the cell string is 2.2 ~ 2.4mm, and the cell string spacing is 2 ± 0.5 mm.

6. The HIT double-sided double-glass photovoltaic assembly as claimed in claim 1, wherein bar codes are pasted at the edges of the double-sided HIT cell (3) and the back glass (5).