CN211320114U

CN211320114U - Conductive core board suitable for novel back contact solar cell

Info

Publication number: CN211320114U
Application number: CN202020345326.9U
Authority: CN
Inventors: 陈影; 张彩霞; 吴仕梁; 张凤鸣
Original assignee: Jiangsu Sunport Power Corp Ltd
Current assignee: Jiangsu Sunport Power Corp Ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-08-21
Anticipated expiration: 2030-03-18

Abstract

The utility model discloses a conductive core plate suitable for novel back contact solar cell, which comprises an insulating material layer, a metal conductive circuit layer, an encapsulation adhesive film layer and a back plate layer which are sequentially arranged from top to bottom, wherein the insulating material layer, the metal conductive circuit layer, the encapsulation adhesive film layer and the back plate layer are all connected by bonding, and the insulating material layer is an EPE material component; the MWT battery pack is suitable for MWT battery packs with asymmetric structures such as positive poles of 5 multiplied by 6 and 5 multiplied by 7, double electrodes and the like; be applicable to the whole piece subassembly of different battery piece specifications 158, 162, 166 etc., different subassembly types, like multiple types such as 60 types, 72 types, 78 types, the utility model discloses series connection between two adjacent strings uses new-type design, can not cause local conducting foil too narrow, increase resistance.

Description

Conductive core board suitable for novel back contact solar cell

Technical Field

The utility model belongs to the technical field of the MWT battery, concretely relates to electrically conductive core suitable for novel back of body contact solar cell.

Background

Solar photovoltaic modules are used more and more widely due to the characteristics of energy conservation, pollution reduction and the like. The MWT type back contact component is more and more widely used due to the characteristics of silver paste saving, high reliability and the like.

For the design of the MWT battery which is used more in the industry at present, the design of 5 × 5 or 6 × 6 and the like for the negative electrode points is uniformly distributed, and the design of a 4 × 4 or 5 × 5 uniform symmetrical structure for the positive electrode points is adopted, so that the number of the positive electrode points is less, the power of the manufactured assembly is low, and in order to improve the power and the reliability of the MWT assembly, the number of the positive electrode points needs to be increased to 5 × 6 or 5 × 7 and the like, the design is a non-uniform design, the current conductive core board is not suitable for use, and the problems of narrow transmission path, non-uniform current transmission and the like can occur in use;

the original conductive core board design is only suitable for MWT batteries with 6 x 6 negative electrode points and 5 x 5 positive electrode points, when the positive electrode points are changed into 5 x 6 or 5 x 7 and other asymmetric structures, the phenomena of short circuit of the positive electrode points and the negative electrode points, over-narrow local width of a conductive foil for transmitting current, resistance increase, uneven current distribution and the like can occur when two connected strings are connected in series.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a conductive core suitable for a novel back contact solar cell to solve the above-mentioned problems in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a conductive core suitable for novel back of body contact solar cell, includes that insulating material layer, metal conducting circuit layer, encapsulation rete and the backplate layer that sets gradually from top to bottom constitute, insulating material layer, metal conducting circuit layer, encapsulation rete and backplate layer all connect through the bonding.

Preferably, the insulating material layer is an EPE material member.

Preferably, the surface of the insulating material layer is provided with a plurality of small holes, the aperture of each small hole is 2-6mm, and the small holes correspond to the positions of the electrode points on the battery piece.

Preferably, the metal conducting circuit layer is a copper foil component, the thickness of the metal conducting circuit layer is 15-60mm, conducting channels are formed in the surface of the metal conducting circuit layer through laser etching, and insulating intervals of 1-4mm are arranged between every two adjacent conducting channels.

Preferably, the packaging adhesive film layer is an EVA layer or a POE layer; the back plate layer is a high polymer polymerization plate material component.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the MWT battery pack is suitable for MWT battery packs with asymmetric structures such as positive poles of 5 multiplied by 6 and 5 multiplied by 7, double electrodes and the like;

2. the module is suitable for the whole module with different cell specifications 158, 162, 166 and the like, and different module types such as a 60 type, a 72 type, a 78 type and various other types;

3. the series connection between two adjacent strings of the utility model adopts a novel design, which can not cause the over-narrow local conductive foil and increase the resistance;

4. the utility model discloses can reduce local current uneven, it is bad to reduce the EL of subassembly.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a diagram of an original metal conductive layer;

fig. 3 is a partial schematic view of positive dots of the present invention;

fig. 4 is a partial schematic view of the positive pole 5 x 6, 5 x 7 of the present invention;

fig. 5 is a schematic plan view of the present invention;

in the figure: 1. a backsheet layer; 2. packaging the adhesive film layer; 3. a layer of insulating material; 4. a metal conductive circuit layer; 5. a conductive path.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1, fig. 3, fig. 4 and fig. 5, the present invention provides a technical solution: the utility model provides a conductive core board suitable for novel back of body contact solar cell, includes that 3, metal conductive circuit layer 4, encapsulation plastic film layer 2 and the backplate layer 1 that set gradually from top to bottom constitute by insulating material layer, 3, metal conductive circuit layer 4, encapsulation plastic film layer 2 and the backplate layer 1 of insulating material layer all connect through the bonding.

In this embodiment, the insulating material layer 3 is preferably an EPE material member.

In this embodiment, preferably, the surface of the insulating material layer 3 is provided with a plurality of small holes, the aperture of each small hole is 4mm, and the small holes correspond to the positions of the electrode points on the battery piece.

In this embodiment, preferably, the metal conducting circuit layer 4 is a copper foil material component, the thickness of the metal conducting circuit layer 4 is 30mm, the surface of the metal conducting circuit layer 4 is etched by laser to form a conducting channel 5, so that the conducting circuit can prevent short circuit of the battery electrodes when the positive and negative electrodes are in a row, meanwhile, the internal electrode point loss of the battery can be compatible, the power generation of the whole battery is not influenced, 3mm insulation intervals are arranged between the adjacent conducting channels, the series connection between the two adjacent strings adopts a novel design, the local conducting foil is not too narrow, and the resistance is increased.

In this embodiment, preferably, the encapsulation adhesive film layer 2 is a POE layer; the back plate layer 1 is a polymer plate material member.

Example 2

In this embodiment, preferably, the surface of the insulating material layer 3 is provided with a plurality of small holes, the aperture of each small hole is 6mm, and the small holes correspond to the positions of the electrode points on the battery piece.

In this embodiment, preferably, the metal conducting circuit layer 4 is a copper foil material component, the thickness of the metal conducting circuit layer 4 is 60mm, the surface of the metal conducting circuit layer 4 is etched by laser to form a conducting channel 5, so that the conducting circuit can prevent short circuit of the battery electrodes when the positive and negative electrodes are in a row, meanwhile, the internal electrode point loss of the battery can be compatible, the power generation of the whole battery is not influenced, 4mm insulation intervals are arranged between the adjacent conducting channels, the series connection between the two adjacent strings adopts a novel design, the local conducting foil is not too narrow, and the resistance is increased.

Example 3

In this embodiment, preferably, the surface of the insulating material layer 3 is provided with a plurality of small holes, the aperture of each small hole is 2mm, and the small holes correspond to the positions of the electrode points on the battery piece.

In this embodiment, preferably, the metal conducting circuit layer 4 is a copper foil material component, the thickness of the metal conducting circuit layer 4 is 15mm, the surface of the metal conducting circuit layer 4 is etched by laser to form a conducting channel 5, so that the conducting circuit can prevent short circuit of the battery electrodes when the positive and negative electrodes are in a row, meanwhile, the internal electrode point loss of the battery can be compatible, the power generation of the whole battery is not influenced, 1mm insulation intervals are arranged between the adjacent conducting channels, the series connection between the two adjacent strings adopts a novel design, the local conducting foil is not too narrow, and the resistance is increased.

In this embodiment, preferably, the encapsulation adhesive film layer 2 is an EVA layer; the back plate layer 1 is a polymer plate material member.

Comparative example 1

Referring to fig. 2, the middle row of copper foils has no battery electrode point loss, so that the problems of partial current loss and dark EL image of the battery piece are solved. Meanwhile, if the positive and negative electrodes are in a column, the battery interconnection cannot be realized due to the short circuit in fig. 2.

The utility model discloses a theory of operation and use flow: when the utility model is processed, the utility model uses the metal conductive circuit layer 4 with the same width 970 plus 1000mm to be combined with the packaging adhesive film layer 2, when in combination, the packaging adhesive film layer 2 is under, the metal conductive circuit layer 4 is on, and the smooth surface of the metal conductive circuit layer 4 is upward; scribing by using a solid laser, etching a specific conductive circuit pattern on the metal conductive circuit layer 4 of the composite packaging adhesive film layer 2, as shown in fig. 5, tearing off the metal conductive circuit layer 4 at a black line part in the pattern after etching to form a specific conductive channel 5, and forming an insulation channel at the torn black line part, wherein the insulation interval is 1-4 mm; a plurality of small holes with the diameter of 2-6mm are punched on the insulating material layer 3 by using a carbon dioxide laser, the positions of the holes correspond to the positions of electrode points on the battery pieces, and finally the manufactured insulating material layer 3, the metal conducting circuit layer 4 and the packaging adhesive film layers 2 and 7 are stacked in sequence from top to bottom and are bonded together in a low-temperature heating mode, so that the processing and manufacturing are completed, and in use, referring to fig. 5, the assembly for connecting 60 batteries and 78 batteries can be realized similarly.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a conductive core board suitable for novel back of body contact solar cell which characterized in that: the packaging structure comprises an insulating material layer (3), a metal conducting circuit layer (4), a packaging adhesive film layer (2) and a back plate layer (1), wherein the insulating material layer (3), the metal conducting circuit layer (4), the packaging adhesive film layer (2) and the back plate layer (1) are sequentially arranged from top to bottom and are all connected through bonding.

2. The conductive core suitable for use in a novel back contact solar cell as claimed in claim 1, wherein: the insulating material layer (3) is an EPE material component.

3. The conductive core suitable for use in a novel back contact solar cell as claimed in claim 2, wherein: the surface of the insulating material layer (3) is provided with a plurality of small holes, the aperture of each small hole is 2-6mm, and the small holes correspond to the positions of the electrode points on the battery piece.

4. The conductive core suitable for use in a novel back contact solar cell as claimed in claim 1, wherein: the metal conducting circuit layer (4) is a copper foil material component, the thickness of the metal conducting circuit layer (4) is 15-60mm, conducting channels (5) are formed in the surface of the metal conducting circuit layer (4) through laser etching, and insulating intervals of 1-4mm are arranged between every two adjacent conducting channels.

5. The conductive core suitable for use in a novel back contact solar cell as claimed in claim 1, wherein: the packaging adhesive film layer (2) is an EVA layer or a POE layer; the back plate layer (1) is a high-molecular polymer plate material component.