阅读说明：本技术 一种导电芯板及制造方法 (Conductive core board and manufacturing method thereof ) 是由 张彩霞 陈影 孙明亮 吴仕梁 张凤鸣 于 2020-05-15 设计创作，主要内容包括：本发明公布一种导电芯板及制造方法,所述导电芯板从上到下依次是绝缘材料层、金属导电线路层、封装胶膜层、背板层,各层之间通过低温加热的方式粘接；所述金属导电线路层和封装胶膜层复合粘结,在所述金属导电线路层的上面设有导电线路图；所述绝缘材料层上设有若干小孔,孔的位置与电池片上的电极点位置对应；所述导电线路图以设定的单元图案为基础,将所述单元图案在电池片上方阵列排布。本发明导电芯板采用纵向基数列13*12切半电池排布方式,实现基数列电池排布,同时二极管接管电池数量相等,接线盒安装方向与组件短边平行,与常规组件接线盒位置一样,这种连接方式如果是焊带组件几乎不可能实现,同时可有效减少设备改造费用。(The invention discloses a conductive core board and a manufacturing method thereof, wherein the conductive core board is sequentially provided with an insulating material layer, a metal conductive circuit layer, a packaging adhesive film layer and a back board layer from top to bottom, and all the layers are bonded in a low-temperature heating mode; the metal conducting circuit layer and the packaging adhesive film layer are bonded in a compounding manner, and a conducting circuit pattern is arranged on the metal conducting circuit layer; the insulating material layer is provided with a plurality of small holes, and the positions of the small holes correspond to the positions of the electrode points on the battery piece; the conductive circuit pattern is based on a set unit pattern, and the unit pattern is arranged in an array above the battery piece. The conductive core board adopts a longitudinal base number series 13 × 12 half-cell arrangement mode to realize base number series cell arrangement, the number of the cells of the diode connecting tubes is equal, the installation direction of the junction box is parallel to the short edge of the assembly, the position of the junction box is the same as that of the junction box of the conventional assembly, the connection mode can be almost impossible to realize if the junction box is a welding strip assembly, and meanwhile, the equipment transformation cost can be effectively reduced.)

1. A conductive core board is characterized in that the conductive core board is sequentially provided with an insulating material layer, a metal conductive circuit layer, a packaging adhesive film layer and a back board layer from top to bottom, and all the layers are bonded in a low-temperature heating mode;

the metal conducting circuit layer and the packaging adhesive film layer are bonded in a compounding manner, and a conducting circuit pattern is arranged on the metal conducting circuit layer; the insulating material layer is provided with a plurality of small holes, and the positions of the small holes correspond to the positions of the electrode points on the battery piece; the conductive circuit pattern is based on a set unit pattern, and the unit patterns are arranged in a square array mode.

2. The conductive core board of claim 1, wherein the unit pattern is in the form of a line unit in a bell-mouth structure and a positive-negative open-divided unit.

3. The conductive core board of claim 2, wherein the unit pattern is a line structure of half cells, the unit pattern is repeated in the transverse and longitudinal directions of the conductive core board with the transverse direction of the unit pattern being a forward direction.

4. Adjacent half cells are connected in series in sequence.

5. The conductive core board of claim 1, wherein the back board is a polymer board, the metal conductive circuit layer is a copper-aluminum foil layer or a copper foil layer, the encapsulating adhesive film layer is an EVA layer or a POE layer, and the insulating material layer is an EPE layer;

and the positions of the diode pipelines are reserved in the middle of the conductive unit lines of the two rows of battery strings, and the conductive copper foil wires of the diodes are inserted.

6. The conductive core board of claim 1, wherein if the positive and negative electrode points of the battery are not aligned, the battery is arranged in a staggered vertical and horizontal manner.

7. The method of manufacturing an electrically conductive core board according to claim 1, comprising the steps of:

manufacturing a metal conductive circuit layer by adopting a copper foil or copper-aluminum foil material, compounding the copper foil or copper-aluminum foil with the same width with a packaging adhesive film layer, scribing by using a solid laser, and etching a specific conductive circuit pattern on the copper foil or copper-aluminum foil coated with an adhesive film;

removing the etched copper foil or copper aluminum foil to form a specific conductive channel and an insulation channel, namely a conductive circuit pattern;

punching a plurality of small holes on the insulating material layer, wherein the positions of the holes correspond to the positions of electrode points on the battery pieces, and isolating a passage between the battery pieces and the conductive core plate;

and stacking the manufactured insulating material layer, the metal conducting circuit layer, the packaging adhesive film layer and the back plate layer in sequence from top to bottom, and bonding the insulating material layer, the metal conducting circuit layer, the packaging adhesive film layer and the back plate layer together in a low-temperature heating mode, so that the conductive core plate is manufactured.

8. The method of claim 6, wherein if a copper-aluminum foil is used as the material of the metal conductive circuit layer, an ultrasonic welding process is added to weld the soldering lug on the electrode point so that the component can be welded.

9. The method of claim 6, wherein the conductive circuit pattern is based on a predetermined unit pattern, and the unit pattern is arranged in a square matrix array on the battery plate;

the insertion mode of the diode pipeline is that a diode conductive copper foil wire is inserted by reserving a diode pipeline position in the middle of conductive unit lines of two rows of battery strings, the insertion mode of the diode pipeline is that on a battery formed by 3 paths of 52 batteries, one half of the battery is connected according to one third of the total number of the batteries, 13X 6 and the other half of the battery is connected according to one third of the total number of the batteries, three diodes are shared, and one diode is responsible for two half of the number of the batteries, namely 2X 26 batteries, and the total number of the batteries is 3X 52.

Technical Field

The invention relates to the technical field of novel MWT solar cell production equipment, in particular to a conductive core board and a manufacturing method thereof.

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. In response to market trend development, the current photovoltaic industry component develops towards large area and large size, the MWT technology is no exception, and large area and large size components are continuously developed. The area of the battery piece is enlarged in the main direction of large size and large area, and high power can be realized by enlarging the number of the battery pieces in the other direction, so that the arrangement mode of the battery pieces is required to be innovated, the even number row direction is basically expanded in the industry, the battery position required to be placed in a diode is limited in a base row, and therefore, higher requirements on a battery interconnection current path are required, but the MWT technology is a conductive circuit PCB plate type design, so that the technical advantages are great in this respect, circuits can be flexibly designed, and the problems that other devices are input, an extra diode wiring pad bus belt in a component is added with an insulating layer and the like can be reduced.

The conventional photovoltaic modules are mostly in arrays of 6 × 10, 6 × 12 and 6 × 24 rows, in this case, the diodes are well wired, and due to the market moving to large-size modules, modules such as 8 × 10, 8 × 12 and 8 × 24 arrays can be designed, but if the actual situation is due to the accommodation space of the equipment, the situation of adding 2 rows of cells cannot be experimented. The 13 × 12 or 13 × 10 cell array is difficult to implement based on conventional soldering techniques, or the diode wiring requires a relatively long and thick insulating layer, and the process becomes extremely complicated, which limits the development and implementation of efficient devices.

Disclosure of Invention

In order to solve the problems in the background art, the invention aims to provide a conductive core plate and a manufacturing method thereof, which can reduce the equipment transformation cost compared with the conventional welding component for changing the arrangement mode of battery pieces, hardly increase additional production procedures, are easy to process, do not need equipment upgrading, are suitable for mass production, can improve the component power, realize a high-efficiency component of 450 watts, and fully exert the advantages of an MWT component.

The invention relates to a conductive core board, which is characterized in that an insulating material layer, a metal conductive circuit layer, a packaging adhesive film layer and a back board layer are sequentially arranged from top to bottom, and the layers are bonded in a low-temperature heating mode;

the metal conducting circuit layer and the packaging adhesive film layer are bonded in a compounding manner, and a conducting circuit pattern is arranged on the metal conducting circuit layer; the insulating material layer is provided with a plurality of small holes, and the positions of the small holes correspond to the positions of the electrode points on the battery piece; the conductive circuit pattern is based on a set unit pattern, and the unit pattern is arranged in an array above the battery piece.

Furthermore, the unit pattern is in a form that the circuit unit adopts a bell mouth unit and an open positive and negative electrode dividing unit.

Further, the unit pattern is a circuit structure of a half cell, the unit pattern is arranged in a positive direction in a transverse direction, and the unit pattern is repeated along the transverse direction and the longitudinal direction of the conductive core board. Adjacent half cells are connected in series in sequence.

Preferably, the back plate is a polymer plate, the metal conductive circuit layer is a copper-aluminum foil layer or a copper foil layer, the packaging adhesive film layer is an EVA (ethylene vinyl acetate) layer or a POE (polyolefin elastomer) layer, and the insulating material layer is an EPE (expanded polyethylene) layer.

And the positions of the diode pipelines are reserved in the middle of the conductive unit lines of the two rows of battery strings, and the conductive copper foil wires of the diodes are inserted.

Furthermore, if the anode and cathode points of the battery are not on the same straight line, the anode and cathode points are arranged in a staggered longitudinal and transverse mode.

The invention also provides a manufacturing method of the conductive core board, which comprises the following steps:

manufacturing a metal conductive circuit layer by adopting a copper foil or copper-aluminum foil material, compounding the copper foil or copper-aluminum foil with the same width with a packaging adhesive film layer, scribing by using a solid laser, and etching a specific conductive circuit pattern on the copper foil or copper-aluminum foil coated with an adhesive film;

removing the etched copper foil or copper aluminum foil to form a specific conductive channel and an insulation channel, namely a conductive circuit pattern;

punching a plurality of small holes on the insulating material layer, wherein the positions of the holes correspond to the positions of electrode points on the battery pieces, and isolating a passage between the battery pieces and the conductive core plate;

and stacking the manufactured insulating material layer, the metal conducting circuit layer, the packaging adhesive film layer and the back plate layer in sequence from top to bottom, and bonding the insulating material layer, the metal conducting circuit layer, the packaging adhesive film layer and the back plate layer together in a low-temperature heating mode, so that the conductive core plate is manufactured.

Preferably, if a copper aluminum foil is used as the material of the metal conductive circuit layer, an ultrasonic welding process is added, and a soldering lug is welded on the electrode point so that the component can be welded.

Further, the conducting circuit pattern is based on a set unit pattern, and the unit pattern is arranged on the cell in a square array mode;

the diode pipeline is inserted in a mode that a diode pipeline position is reserved in the middle of the conductive unit circuit of the two rows of battery strings, and a diode conductive copper foil wire is inserted to distinguish the diode pipeline from a traditional welding assembly, the diode pipeline is inserted in a mode that on the batteries formed by the 3 paths of 52 batteries, one half of the batteries 13 x 6 and the other half of the batteries 13 x 6 are connected in a mode of sharing three diodes, one diode is responsible for two half of the batteries, namely 2 x 26 batteries, and the total number of the batteries is 3 x 52.

Has the advantages that:

1. the invention adopts a longitudinal base number series 13 × 12 half-cut cell arrangement mode to realize base number series cell arrangement, the number of the diode connecting tube cells is equal, the installation direction of the junction box is parallel to the short edge of the assembly, and the position of the junction box is the same as that of the junction box of the conventional assembly, and the connection mode can not be realized if the welding strip assembly is adopted.

2. The invention is applicable to the whole assembly of different cell sizes 158, 162, 166, 210 and the like, and different assembly models 13 x 12, 13 x 10 and the like.

3. The junction box is still arranged in the center of the assembly with the short sides parallel to each other, and the position of the junction box is the same as that of a conventional half main flow assembly, so that the equipment transformation investment and transformation time are reduced, and the mass production can be directly realized.

4. The conductive unit design of the invention can realize the micro-adjustment of the number of the positive electrodes of the battery piece and is compatible with the situation that the positive electrodes and the negative electrodes are also compatible with the staggered array condition in the same row.

Drawings

FIG. 1 is a schematic structural diagram of an electrically conductive core board according to the present invention;

FIG. 2 is a diagram of a conductive pattern layout of the conductive core of the present invention;

FIG. 3 is an electronic circuit diagram of an electrically conductive core plate in example 1 of the present invention;

FIG. 4 is a schematic plan view of a conductive core of the present invention;

FIG. 5 is an enlarged view of a portion of the conductive pattern of the inventive conductive core;

FIG. 6 is an electronic circuit diagram of an electrically conductive core plate in example 2 of the present invention;

FIG. 7 is a schematic diagram of the cell arrangement in inventive example 2;

in the figure, 1-an insulating material layer, 2-a metal conducting circuit layer, 3-a packaging adhesive film layer, 4-a back plate layer, 5-a positive electrode and 6-a negative electrode.

Detailed Description

The invention is described in detail below with reference to the accompanying drawings: