CN220604701U

CN220604701U - Conductive core plate

Info

Publication number: CN220604701U
Application number: CN202320619090.7U
Authority: CN
Inventors: 职森森; 梁东海; 王飞; 罗西佳; 逯好峰; 游达
Original assignee: Jiangsu Sunport Power Corp Ltd
Current assignee: Jiangsu Sunport Power Corp Ltd
Priority date: 2023-03-27
Filing date: 2023-03-27
Publication date: 2024-03-15
Anticipated expiration: 2033-03-27

Abstract

The utility model discloses a conductive core plate, wherein a thickening area is arranged at the edge position of the conductive core plate at the corner connection position between two adjacent conductive core plate strings, and the thickening area is a thickening area made of a conductive metal foil layer or is an integrated structure on the conductive core plate. The utility model provides a conductive core plate, which reduces the surface resistance by increasing the conductive cross section of a series and a series turning, thereby reducing the heat loss of the turning.

Description

Conductive core plate

Technical Field

The utility model belongs to the field of solar photovoltaic modules, and relates to a conductive core plate.

Background

The back contact battery is divided into an IBC battery and an MWT battery, and the positive and negative welding points of the back contact battery are arranged on the back of the battery. The MWT (Metal Wrap Through, metal perforation winding) technology is a technical route for preparing both the positive and negative electrodes of a battery on the back surface of the battery (back surface of the positive and negative electrodes), thereby obtaining a photovoltaic module with high efficiency, high reliability, high compatibility, more beautiful appearance and environmental protection. The IBC cell is different from other crystalline silicon solar cells in that the front side of the cell is not shielded by any metal electrode, and the emitter and the positive and negative electrodes of the IBC cell are arranged on the back side of the cell and distributed in an interdigital manner. The characteristics enable the front light receiving area of the IBC battery to be maximum.

The back contact battery is packaged into a module, with a solder tape welding scheme, and also with a conductive core plate scheme using a two-dimensional package. The current conductive core plate is in an interdigital design, and each finger is only responsible for a part of current led out by a battery, so that the current density of a single finger is not large, and the heat loss is not large. However, at the turning place between strings, the current flowing through the whole battery string has larger heat loss, and two schemes for solving the problem of turning bottle type in the industry are as follows:

1. the thickness of the conductive core plate is increased, and although the scheme of increasing the thickness can reduce heat loss, the cost of the conductive core plate is greatly increased, and the productivity of a conductive core plate production line is reduced;

2. increasing the length of the conductive core plate, this solution increases the component length, not only increasing the cost, but also reducing the component power.

Disclosure of Invention

The utility model aims to solve the problems, and provides a conductive core board, which reduces the surface resistance by increasing the conductive cross section of the turns of strings and turns, thereby reducing the heat loss of the turns.

The application relates to a conductive core plate, the border position of conductive core plate is equipped with the thickening area in the corner junction between two adjacent conductive core plate cluster and cluster, the thickening area is the thickening area that conductive metal foil layer was made, perhaps the thickening area is in the integration structure on the conductive core plate.

Further, the thickened area copper foil layer or aluminum foil layer or copper aluminum foil layer.

Further, if the thickened area is a thickened area made of a conductive metal foil layer, the thickened area is connected by ultrasonic welding or the like or is connected by low-temperature silver paste.

Further, the thickened area is rectangular.

The technical scheme adopted by the utility model has the following technical effects:

the utility model reduces the surface resistance by increasing the conductive section of the turns of the strings, thereby reducing the heat loss of the turns; the application has the advantages of simple structure, easy operation, no need of increasing the area of the assembly and further cost reduction.

Drawings

FIG. 1 is a schematic structural view of a conductive core plate;

FIG. 2 is an enlarged view of the connection between the strings of the conductive core;

FIG. 3 is an enlarged view of an improvement of the conductive core plate of the present application;

in the figure, 1-conductive core, 2-thickened area.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons of ordinary skill in the art may readily appreciate from the teachings of the present utility model, so that the present utility model is not limited to the specific examples disclosed.

Example 1

As shown in fig. 3, the present application is a conductive core board 1, where a thickening area 2 is disposed at the edge position of the conductive core board 1 at the corner connection between two adjacent conductive core boards 1 strings, and the thickening area 2 is a thickening area made of a conductive metal foil layer, or the thickening area 2 is an integrated structure on the conductive core board 1.

Further, the thickening area 2 is a copper foil layer or an aluminum foil layer or a copper aluminum foil layer.

Further, if the thickened area 2 is a thickened area made of a conductive metal foil layer, the thickened area is connected by ultrasonic welding or the like or connected by low-temperature silver paste.

Further, the thickened region 2 is rectangular.

The thickening at the corner connection between the strings of the conductive core plates 1 can be the newly added conductive foils such as copper foil, aluminum foil, copper aluminum foil and the like, and is also the integrated local thickening. The newly added local conductive foil can be connected by ultrasonic welding and the like, and also can be connected by low-temperature silver paste. Taking the conductive core plate 1 for 158 IBC battery as an example, the improvement scheme is manufactured according to the following steps:

1. compounding copper foil and EVA into two layers of required conductive core plates;

2. scribing the copper foil with a laser;

3. preparing a required conductive core plate;

4. in the position of FIG. 3 of the conductive core plate, a section of metal foil with the width of 10mm and the length of 158mm is welded on one side of the metal;

5. the metal foil is copper foil or copper aluminum foil, and the thickness is 30-200 um;

6. the welding means may be ultrasonic welding or other welding means.

The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but rather is intended to cover any and all modifications, equivalents, alternatives, and improvements within the spirit and principles of the present application.

Claims

1. A conductive core board is characterized in that a thickening area is arranged at the edge position of the conductive core board at the corner connection position between two adjacent conductive core board strings, the thickening area is a thickening area made of a conductive metal foil layer,

or the thickened region is a unitary structure on the conductive core plate.

2. A conductive core according to claim 1, wherein the thickened area is a copper foil layer or an aluminum foil layer or a copper aluminum foil layer.

3. A conductive core according to claim 1, wherein if the thickened region is a thickened region of a conductive metal foil layer, the connection is made by ultrasonic welding or by low temperature silver paste.

4. A conductive core according to any one of claims 1 to 3, wherein the thickened region is rectangular.