CN219738970U

CN219738970U - Solar battery pack

Info

Publication number: CN219738970U
Application number: CN202222909172.3U
Authority: CN
Inventors: 蒲天; 程明
Original assignee: Shanghai Deying Ruichuang Semiconductor Technology Co ltd
Current assignee: Shanghai Deying Ruichuang Semiconductor Technology Co ltd
Priority date: 2022-11-02
Filing date: 2022-11-02
Publication date: 2023-09-22
Anticipated expiration: 2032-11-02

Abstract

The utility model relates to the technical field of solar cell interconnection, in particular to a solar cell set. The solar battery pack is provided with a battery piece, a metal wire and an adhesive film component, specifically, the battery piece is a solar battery piece, the battery piece is provided with a grid line, the metal wire is abutted to the grid line, the metal wire and the grid line are electrically conducted, the adhesive film component covers the joint of the metal wire and the grid line, the metal wire and the grid line are fixedly connected, and the connection stability is improved. The adhesive film assembly comprises a first adhesive film piece and a second adhesive film piece, and the first adhesive film piece covers the joint of the metal wire and the grid line along the arrangement direction of the metal wire; the second adhesive film piece covers the first adhesive film piece and the battery piece along the arrangement direction of the grid line, so that the metal wire and the battery piece can be glued and fixed at low temperature, and the second adhesive film piece is used for fixing the first adhesive film piece and the battery piece, so that the first adhesive film piece is tightly connected with the battery piece and is not easy to fall off.

Description

Solar battery pack

Technical Field

The utility model relates to the technical field of solar cell interconnection, in particular to a solar cell pack.

Background

At present, in the interconnection of battery plate electrodes, high-temperature welding metal wires are adopted, so that the battery plate is required to bear high temperature instantly, amorphous silicon and oxide glass structures can be damaged by high temperature, passivation effect is seriously influenced, conversion efficiency is influenced, part of battery plates cannot bear high temperature, and the process temperature is below 160 ℃, so that the interconnection of the electrodes of the battery plates cannot be realized in a welding mode.

Accordingly, there is a need for a solar cell array that at least partially addresses the problems of the prior art.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art or related art.

To this end, the utility model proposes a solar cell stack.

In view of this, a solar cell set according to an embodiment of the present utility model includes:

the battery piece is provided with grid lines;

the metal wire is abutted to the grid line of the battery piece and is intersected with the grid line and used for conducting electricity with the grid line;

the glued membrane subassembly, glued membrane subassembly includes: the first adhesive film piece and the second adhesive film piece cover the joint of the metal wire and the grid line along the arrangement direction of the metal wire; the second adhesive film piece covers the first adhesive film piece and the battery piece, and the first adhesive film piece and the second adhesive film piece are arranged in a crossing manner;

the plurality of battery pieces are connected with adjacent battery pieces through the metal wires, and the metal wires are used for connecting the adjacent battery pieces in series.

In one possible embodiment, the first film unit includes:

the first curing layer covers the joint of the metal wire and the grid line;

the first bearing layer is connected to one side of the solidified layer far away from the metal wire;

in one possible embodiment, the second film unit includes:

the second solidification layer is covered at the joint of the metal wire and the grid line;

the second bearing layer is connected to one side of the solidified layer far away from the metal wire;

wherein the light transmittance of the first cured layer, the second cured layer, and the first and second carrier layers is greater than or equal to 50%.

In a possible embodiment, a groove is provided in the first solidified layer on the side close to the wire, in which groove the wire is placed.

In a possible embodiment, the width of the first film member is not more than 5mm, and the diameter of the wire is about 0.25mm.

In a possible embodiment, the material of the first cured layer and the second cured layer is at least one of modified resin, EVA and POE.

In a possible implementation manner, a plurality of grid lines are arranged on each battery piece, and the grid lines are parallel to each other;

the metal wires are intersected with the grid lines.

In a possible embodiment, a plurality of metal wires are provided, and each metal wire is disposed perpendicular to a plurality of the gate lines.

Compared with the prior art, the utility model at least comprises the following beneficial effects: the solar battery pack provided by the embodiment of the utility model is provided with the battery piece, the metal wire and the adhesive film assembly, and particularly, the battery piece is a solar battery piece, the battery piece is provided with the grid line, electrons generated by illumination of the battery piece are collected through the grid line, the metal wire is abutted to the grid line, and the adhesive film assembly covers the joint of the metal wire and the grid line through electric conduction of the metal wire and the grid line, so that the metal wire and the grid line are fixedly connected, and the connection stability is improved. The adhesive film assembly comprises a first adhesive film piece and a second adhesive film piece, the first adhesive film piece is covered on the joint of the metal wire and the grid line along the arrangement direction of the metal wire, the metal wire and the grid line are fixed under the low temperature condition through the first adhesive film piece, the metal wire and the grid line are prevented from falling off, and the reliability is improved. The second glued membrane piece covers in first glued membrane piece and battery piece, and first glued membrane piece and second glued membrane piece alternately set up, guarantees that first glued membrane piece and battery piece can glue under the low temperature more firmly and make first glued membrane piece and battery piece zonulae occludens, further guarantees the connection stability of first glued membrane piece to wire and grid line.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the specification. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

fig. 1 is a schematic view of an angle structure of a solar cell module according to an embodiment of the present utility model;

fig. 2 is a schematic view of another angle of a solar cell module according to an embodiment of the present utility model;

fig. 3 is an assembly schematic diagram of a solar cell module according to an embodiment of the present utility model.

Wherein, the correspondence between the reference numerals and the component names in fig. 1 to 3 is:

110 battery plate, 111 grid line, 120 metal wire, 130 adhesive film assembly, 131 first adhesive film assembly, 132 second adhesive film assembly, 133 groove, 1311 first solidified layer, 1312 first bearing layer, 1321 second solidified layer, 1322 second bearing layer.

Detailed Description

In order to better understand the above technical solutions, the following detailed description of the technical solutions of the embodiments of the present utility model is made by using the accompanying drawings and the specific embodiments, and it should be understood that the specific features of the embodiments of the present utility model are detailed descriptions of the technical solutions of the embodiments of the present utility model, and not limit the technical solutions of the present utility model, and the technical features of the embodiments of the present utility model may be combined with each other without conflict.

As shown in fig. 1 to 3, a solar cell set according to an embodiment of the present utility model includes: a cell 110, wherein the cell 110 is provided with a grid line 111; a wire 120 abutting against the grid line 111 of the battery sheet 110 and electrically conducting with the grid line 111; the first adhesive film piece 131, the adhesive film assembly 130 comprises a first adhesive film piece 131 and a second adhesive film piece 132; the first adhesive film member 131 covers the connection portion between the metal wire 120 and the grid line 111 along the arrangement direction of the metal wire 120, the second adhesive film member 132 covers the first adhesive film member 131 and the battery plate 110, and the first adhesive film member 131 and the second adhesive film member 132 are disposed in a crossing manner.

It can be understood that the solar battery pack provided by the embodiment of the utility model is provided with a battery piece 110, a metal wire 120 and a film assembly 130, wherein the film assembly 130 comprises a first film member 131 and a second film member 132; specifically, the first adhesive film member 131 covers the connection portion between the metal wire 120 and the grid line 111 along the arrangement direction of the metal wire 120, the second adhesive film member 132 covers the first adhesive film member 131 and the battery piece 110, and the first adhesive film member 131 and the second adhesive film member 132 are arranged in a crossing manner, so that the metal wire 120 and the battery piece 110 can be glued more firmly at a low temperature, and the metal wire 120 is tightly connected with the battery piece 110. Compared with a solar cell adopting high-temperature welding, the metal wire 120, the cell 110 and the first adhesive film member 131 can be tightly fixed at a low temperature to realize the interconnection of the cell 110.

Illustratively, the solar cell stack may be a heterojunction cell stack.

In some examples, as shown in fig. 1 to 3, the first film unit 131 includes: a first cured layer 1311 covering a junction between the wire 120 and the gate line 111; a first carrier layer 1312 is connected to a side of the first solidified layer 1311 remote from the wires 120.

It can be appreciated that the first adhesive film member 131 is provided with a first cured layer 1311 and a first bearing layer 1312, where the first cured layer 1311 covers the connection between the wire 120 and the grid line 111, and the first cured layer 1311 has adhesion, and can adhere the wire 120 and the grid line 111 to each other at a lower temperature, so as to ensure that the wire 120 and the grid line 111 are fixedly connected. The first bearing layer 1312 is disposed on a side of the first cured layer 1311 away from the metal wire 120, and the first bearing layer 1312 has no adhesion, so that the first bearing layer 1312 can protect the surface of the first cured layer 1311, thereby avoiding damage to the first cured layer 1311 during processing, handling and use, and causing the metal wire 120 to fall off from the gate line 111, and improving reliability.

It will be appreciated that the wire 120 may be made of a material having good electrical conductivity to ensure the performance of the solar cell module, and that the wire 120 may be made of copper wire, for example.

In some examples, as shown in fig. 1 to 3, the second film unit 132 includes: the second cured layer 1321, the second carrier layer 1322, are connected to the first adhesive film member 131 and the battery piece 110.

It can be appreciated that the second adhesive film piece 132 fixes the first adhesive film piece 131, specifically, the second cured layer 1321 fixes the first bearing layer 1312 and the battery piece 110, so that the first adhesive film piece 131 is tightly connected with the battery piece 110, and further, the connection stability of the first adhesive film piece 131 to the metal wire 120 and the grid line 111 is ensured.

In some examples, as shown in fig. 2, a groove 133 is provided on a side of the first solidified layer 1311 adjacent to the wire 120, and the wire 120 is placed in the groove 133.

It can be appreciated that, since the metal wire 120 abuts against the grid line 111 and protrudes from the surface of the battery plate 110, the first cured layer 1311 is used to fix the metal wire 120 at the grid line 111 of the battery plate 110, which is easy to generate gaps, and results in unstable connection, thereby causing poor contact between the metal wire 120 and the grid line 111 and affecting the normal operation of the solar cell set. Therefore, a groove 133 may be formed on a side of the cured layer 131 near the metal wire 120, so that the metal wire 120 is placed in the groove 133, so that the cured layer 131 can be firmly attached to the surface of the battery piece 110, thereby tightly attaching the metal wire 120 and the grid line 111, and improving the reliability of the solar battery.

In some examples, the thickness of the first cured layer 1311 and the second cured layer 1321 described above is 10 μm to 200 μm; the thickness of the first and second carrier layers 1312 and 1322 is 10 μm to 100 μm.

It is understood that when the thickness of the first and second cured layers 1311 and 1321 is too thick, the light transmittance of the first and second cured layers 1311 and 1321 may be reduced, which affects the area of the solar cell 110 irradiated with sunlight, thereby affecting the electron efficiency generated by the irradiation of light. When the thickness of the first cured layer 1311 is too thin, the adhesion of the first cured layer 1311 may be reduced, and the fastening of the wire 120 to the gate line 111 may not be ensured; when the thickness of the second cured layer 1321 is too thin, the adhesion of the second cured layer 1321 is reduced, and the connection tightness between the first adhesive film member 131 and the battery piece 110 cannot be ensured. Therefore, the thicknesses of the first and second cured layers 1311 and 1321 are set to 10 μm to 200 μm, which ensures the light transmittance of the first and second cured layers 1311 and 1321, and also ensures the connection tightness of the first cured layer 1311 to the wires 120 and the grid lines 111, and further ensures the connection tightness of the second cured layer 1321 to the first adhesive film member 131 and the battery sheet 110, thereby ensuring the performance and reliability of the solar cell stack.

It can be appreciated that when the thicknesses of the first bearing layer 1312 and the second bearing layer 1322 are too thick, the light transmittance of the first bearing layer 1312 and the second bearing layer 1322 is reduced, which affects the area of the solar cell 110 irradiated by sunlight, and thus affects the electron efficiency generated by illumination. When the thicknesses of the first and second bearing layers 1312 and 1322 are too thin, the structural strength of the first and second bearing layers 1312 and 1322 is reduced, so that the thicknesses of the first and second bearing layers 1312 and 1322 are set to 10 μm to 100 μm, on one hand, the light transmittance of the first and second bearing layers 1312 and 1322 is ensured, and on the other hand, the structural strength of the first and second bearing layers 1312 and 1322 is ensured, so as to ensure the protection of the first bearing layer 1312 against the first solidified layer 1311 and the protection of the second bearing layer 1322 against the second solidified layer 1321, and simultaneously, the performance and reliability of the solar cell stack are ensured.

In some examples, the material of the first cured layer 1311 and the second cured layer 1321 is one of modified resin, EVA, and POE.

It can be appreciated that the first cured layer 1311 and the second cured layer 1321 can be made of one material selected from modified resin, EVA and POE, and have better light transmittance and crosslinking property, so as to ensure the performance of the solar cell stack.

In some examples, the first and second carrier layers 1312, 1322 are made of PET.

It will be appreciated that the first and second carrier layers 1312 and 1322 may be made of PET, and have good impact resistance and corrosion resistance, so as to ensure the protection of the first and second cured layers 1311 and 1321, and high transparency, and ensure light transmittance. The performance of the solar battery pack is ensured.

In some examples, as shown in fig. 1 to 3, a plurality of the grid lines 111 are disposed on each of the battery pieces 110, and the plurality of grid lines 111 are parallel to each other; the metal wire 120 is disposed to intersect the plurality of gate lines 111.

It can be appreciated that a plurality of grid lines 111 may be disposed on each of the battery cells 110 to improve the efficiency of collecting electrons generated by illumination and the performance of the solar cell set, and the plurality of grid lines 111 are parallel to each other and the distances between the adjacent grid lines 111 are the same, so that each grid line 111 has uniformity of collecting electrons. And the metal wires 120 are intersected with each grid line 111, so that the metal wires 120 can be contacted with all the grid lines 111, electric conduction is realized, and the performance of the solar battery pack is ensured.

In some examples, as shown in fig. 1 to 3, the plurality of wires 120 are provided, and each of the wires 120 is disposed perpendicular to the plurality of gate lines 111.

It can be appreciated that the plurality of metal wires 120 are provided, so that the efficiency of electric conduction is improved, and each metal wire 120 is vertically arranged with the plurality of grid lines 111, so that the adjacent metal wires 120 are parallel to each other, the intersection of the metal wires 120 is avoided, the electric conduction performance is influenced, and the performance of the solar battery pack is ensured.

In some examples, as shown in fig. 1, the first adhesive film 131 is dotted; the first adhesive layer 131 covers the connection portion between each of the wires 120 and the gate line 111.

It can be understood that the first adhesive film layer 131 may be in a dot shape, i.e. the first adhesive film layer 131 may be disposed intermittently, and the first adhesive film layer 131 only covers the connection portion between each metal wire 120 and the grid line 111, so as to reduce the covering area of the first adhesive film layer 131 on the battery plate 110 as much as possible while ensuring the connection tightness between the metal wires 120 and the grid line 111, and improve the efficiency of generating electrons.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A solar cell stack, comprising:

the battery piece is provided with grid lines;

2. The solar cell stack of claim 1, wherein the first adhesive film member comprises:

the first curing layer covers the joint of the metal wire and the grid line;

the first bearing layer is connected to one side of the first solidified layer far away from the metal wire.

3. The solar cell stack of claim 2, wherein the second adhesive film member comprises:

the second curing layer is covered on the first bearing layer and the battery piece;

and the second bearing layer is connected to one side of the second solidified layer far away from the metal wire.

4. The solar cell set according to claim 3, wherein,

the light transmittance of the first cured layer, the first bearing layer, the second cured layer and the second bearing layer is greater than or equal to 50%.

5. The solar cell set according to claim 2, wherein,

and a groove is formed in one side, close to the metal wire, of the first solidified layer, and the metal wire is placed in the groove.

6. The solar cell set according to claim 3, wherein,

the thickness of the first cured layer and the second cured layer is 10 μm to 200 μm; the thickness of the first bearing layer and the second bearing layer is 10 μm to 100 μm.

7. The solar cell set according to claim 1, wherein,

a plurality of grid lines are arranged on each battery piece and are parallel to each other;

the metal wires are arranged in a plurality, and each metal wire and the grid lines are arranged vertically.

8. The solar cell set according to claim 1, wherein,

the first adhesive film piece is in a dot shape;

the first adhesive film piece covers the joint of each metal wire and each grid line.