CN212230442U

CN212230442U - Water-blocking PID-resistant solar panel assembly

Info

Publication number: CN212230442U
Application number: CN202020949738.3U
Authority: CN
Inventors: 杨小旭; 潘建军; 王富成; 秦文彬; 许伟
Original assignee: Suzhou First Pv Material Co ltd
Current assignee: Suzhou First Pv Material Co ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2020-12-25
Anticipated expiration: 2030-05-29

Abstract

The utility model belongs to the technical field of solar cell, the solar panel assembly who relates to an anti PID type blocks water specifically says so, including backplate, lower encapsulation glued membrane, panel, EVA glued membrane and glass, the backplate perhaps be provided with the water blocking layer on the lower encapsulation glued membrane, the water blocking layer is including being located high water blocking district and low water blocking district, the steam transmissivity of high water blocking district < 0.5g/m².d^‑1The water vapor transmission rate of the low water resistance area is more than 5g/m².d^‑1. The utility model can locally block water for the battery assembly, which can effectively prevent the water vapor in the environment from entering the battery assembly and ensure the water vapor entering the battery assembly to be discharged; improved resistance of battery assemblyPID effects.

Description

Water-blocking PID-resistant solar panel assembly

Technical Field

The utility model belongs to the technical field of solar cell, the solar panel assembly of anti PID type that specifically says so relates to block water.

Background

Solar module's back encapsulation, prior art is that the single glass back uses polymer multilayer combined material, the glass is used at the dual glass subassembly back, carry out lamination packaging with the EVA glued membrane and become the subassembly, the subassembly is long-term in outdoor use, especially in the high temperature and high humidity region, inside steam enters into the subassembly easily, on the one hand, cause the bonding delaminating of glued membrane to produce appearance problems such as swell, on the other hand steam can make the glued membrane degradation, produce acidic material, these acidic material can corrode the metal conducting layer on the battery piece, cause the electricity generation inefficacy of subassembly. Power generation failure of the assembly due to moisture infiltration is particularly appreciated over long periods of use. In order to relieve the failure of the battery piece, CN109401682A, CN105647406A and CN104449436B enhance the water-blocking performance of the adhesive film and reduce the release amount of acetic acid of the adhesive film under the water vapor condition, and the method can only relieve the failure to a certain extent, control the entry of water vapor and protect the battery piece from being corroded and damaged.

In order to solve the problem of water vapor entering, the back plate of CN110757916A adopts a layer of metal film or metal coating to reduce the water vapor transmission rate to 0.01g/m².d^-1(ii) a CN107240617A adopts a material layer added with a water-blocking agent as a layer of the composite material; CN104868003A adopts a metal foil material layer with the thickness of 5-100 microns; the barrier layer adopted by CN102496642B is made of aluminum or silicon dioxide material; the water-resistant layer adopted in CN101814542A is Liquid Crystal Polymer (LCP).

The composite back plate in the prior art of the invention only simply enhances the water resistance of the high polymer material, and compared with the scheme that inorganic glass is used as the back plate material, the water vapor permeability performance of all areas on the back surface is not different, so that the water vapor cannot seep out even though the water vapor is prevented from seeping; by adopting the scheme or using glass as a back plate for packaging, although the seepage of water vapor on the front surface and the back surface can be solved, the problem of seepage of the water vapor entering the assembly for a long time is not considered, and the problem of assembly failure also exists.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a first purpose is the inefficacy problem that the battery piece received steam corrosion to arouse in solving the subassembly, provides the solar module of the anti PID type that blocks water, realizes highly blocking water at the battery piece region of panel, realizes low blocking water at the battery piece clearance region, carries out the protection that blocks water by force to the battery piece region, then can make steam come in and go out in clearance department in addition, reaches the purpose that steam is not at the inside accumulation of subassembly.

The purpose of the utility model is realized through the following technical scheme:

the solar cell module comprises a back plate, a lower packaging adhesive film, a cell panel, an EVA adhesive film and glass, wherein a water-blocking layer is arranged on the back plate or the lower packaging adhesive film and comprises a high water-blocking area and a low water-blocking area, and the water vapor transmittance of the high water-blocking area is less than 0.5g/m².d^-1The water vapor transmission rate of the low water resistance area is more than 5g/m².d^-1。

When the module generates electricity in the daytime, the temperature of the battery module is higher than the ambient temperature, and water vapor can seep out from the interior of the battery module through the low-resistance water area; and the components do not work at night, and water vapor can be prevented from permeating into the components from the environment through high water resistance.

Preferably, the high-water-resistance area is located in a cell area of the cell panel, and the low-water-resistance area is located at a cell interval.

Preferably, the high water resistance region is located in a cell region of the cell panel and at a part of cell interval, and the low water resistance region is located at a part of cell interval.

Preferably, the interval of the cell plates in which the low-resistance water region is located accounts for 80% or more of the interval of all the cell plates.

Preferably, the high water-resistant region is an organic thin film with a thickness of 0.1-100 microns.

Preferably, the waterproof layer is arranged on the back plate and is positioned between the back plate and the lower packaging adhesive film.

Preferably, the water-blocking layer is provided with two or more layers.

Through implementing above-mentioned technical scheme, the utility model discloses following advantage has:

1. the battery assembly is partially blocked, so that water vapor in the environment can be effectively prevented from entering the battery assembly, and the water vapor entering the battery assembly can be discharged;

2. the PID resistance effect of the battery assembly is improved;

3. the formed organic film can realize toughening and reduce the risk of battery fragmentation or subfissure;

4. the formed compact organic film can prevent the passivation layer of the battery piece from being damaged by the packaging material or metal ions in the outside.

Drawings

Fig. 1 is a schematic view of a solar cell module in embodiment 1 of the present invention;

fig. 2 is a schematic view of a solar cell module according to embodiment 2 of the present invention;

fig. 3 is a schematic view of a solar cell module in embodiment 4 of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description. It is understood that the embodiments of the present invention are merely illustrative and not restrictive, and that various changes and modifications may be made without departing from the spirit and scope of the present invention in accordance with the ordinary skill and knowledge of the art.

Example 1

A water-blocking anti-PID solar cell panel assembly is shown in figure 1 and comprises a back panel 100, a lower packaging adhesive film 200, a cell panel 300, an EVA adhesive film 400 and glass 500, the structures of the components are the same as those in the prior art, except that a water-blocking layer is arranged on the front surface (namely the contact surface with the lower packaging adhesive film 200) of the back panel 100, the water-blocking layer comprises a high water-blocking area 600a and a low water-blocking area 600b, and the water vapor transmittance of the high water-blocking area 600a is 0.1g/m².d^-1The water vapor transmission rate of the low water resistance area 600b is 6g/m².d^-1. The high water resistance area 600a is positioned on the battery boardThe low water resistance region 600b is located at the interval of all the cells of the cell panel.

Example 2

A water-blocking anti-PID solar cell panel assembly is shown in figure 2 and comprises a back panel 100, a lower packaging adhesive film 200, a cell panel 300, an EVA adhesive film 400 and glass 500, wherein the structures are the same as those in the prior art, the difference is that two water-blocking layers are arranged on the front surface of the back panel 100 (namely the contact surface of the back panel 100 and the lower packaging adhesive film 200), each water-blocking layer comprises a high water-blocking area 600a and a low water-blocking area 600b, and the water vapor transmittance of the high water-blocking area 600a is 0.05g/m².d^-1The water vapor transmission rate of the low water resistance area 600b is 6.5g/m².d^-1. The high water resistance region 600a is located in all cell areas of the cell panel, and the low water resistance region 600b is located at all cell intervals of the cell panel.

Example 3

A water-blocking anti-PID solar cell panel assembly is shown in figure 3 and comprises a back plate 100, a lower packaging adhesive film 200, a cell panel 300, an EVA adhesive film 400 and glass 500, the structures of the components are the same as those in the prior art, except that a water-blocking layer is arranged on the front surface (namely the contact surface with the cell panel 300) of the lower packaging adhesive film 200, the water-blocking layer comprises a high water-blocking area 600a and a low water-blocking area 600b, and the water vapor transmittance of the high water-blocking area 600a is 0.01g/m².d^-1The water vapor transmission rate of the low water resistance area 600b is 10g/m².d^-1. The high water resistance region 600a is located in the whole cell area of the cell panel and 10% of the cell interval, and the low water resistance region 600b is located in 90% of the cell interval of the cell panel.

Example 4

A water-blocking anti-PID solar cell panel assembly comprises a back panel 100, a lower packaging adhesive film 200, a cell panel 300, an EVA adhesive film 400 and glass 500, the structures of the solar cell panel assembly are the same as those in the prior art, the difference is that a water-blocking layer is arranged in the lower packaging adhesive film 200 and comprises a high water-blocking area 600a and a low water-blocking area 600b, and the water vapor transmittance of the high water-blocking area 600a is 0.001g/m².d^-1The water vapor transmission rate of the low water resistance area 600b is 7g/m².d^-1. High resistanceThe water area 600a is located in the whole cell area of the cell panel, and the low-resistance water area 600b is located in the whole cell interval of the cell panel.

Example 5

A water-blocking anti-PID solar cell panel assembly is shown in figure 3 and comprises a back plate 100, a lower packaging adhesive film 200, a cell panel 300, an EVA adhesive film 400 and glass 500, the structures of the components are the same as those in the prior art, except that a water-blocking layer is arranged on the front surface (namely the contact surface with the cell panel 300) of the lower packaging adhesive film 200, the water-blocking layer comprises a high water-blocking area 600a and a low water-blocking area 600b, and the water vapor transmittance of the high water-blocking area 600a is 0.1g/m².d^-1The water vapor transmission rate of the low water resistance area 600b is 20g/m².d^-1. The high water resistance region 600a is located in the whole cell area of the cell panel and 20% of the cell interval, and the low water resistance region 600b is located in 80% of the cell interval of the cell panel.

Claims

1. A water-blocking PID-resistant solar panel assembly comprises a back plate, a lower packaging adhesive film, a panel, an EVA adhesive film and glass, and is characterized in that a water-blocking layer is arranged on the back plate or the lower packaging adhesive film, the water-blocking layer comprises a high water-blocking area and a low water-blocking area, and the water vapor transmittance of the high water-blocking area is less than 0.5g/m².d^-1The water vapor transmission rate of the low water resistance area is more than 5g/m².d^-1。

2. A water-blocking PID type solar panel assembly according to claim 1, wherein the high water-blocking regions are located in the cell areas of the panel and the low water-blocking regions are located at the cell spaces.

3. A water-blocking PID type solar panel assembly according to claim 1, characterized in that said high water-blocking area is an organic thin film with a thickness comprised between 0.1 micron and 100 micron.

4. The water-blocking and PID-resistant solar panel assembly according to claim 1, wherein the water-blocking layer is disposed on the back sheet and between the back sheet and the lower encapsulant film.

5. A water-blocking PID-resistant solar panel assembly according to claim 1, wherein the water-blocking layer is provided with two or more layers.

6. A water-blocking PID type solar panel assembly according to claim 1, wherein the high water-blocking region is located in the cell region of the panel and in the partial cell gap, and the low water-blocking region is located in the partial cell gap.

7. A water-blocking PID-resistant solar cell panel assembly according to claim 1, wherein the low water-blocking region is located at a cell spacing of 80% or more of the total cell spacing.