WO2017177726A1

WO2017177726A1 - Solar cell module and method for manufacturing same, assembly, and system

Info

Publication number: WO2017177726A1
Application number: PCT/CN2017/000123
Authority: WO
Inventors: 林建伟; 季根华; 刘志锋; 孙玉海; 张育政
Original assignee: 泰州中来光电科技有限公司
Priority date: 2016-04-14
Filing date: 2017-01-19
Publication date: 2017-10-19
Also published as: CN105845754A; JP3220955U

Abstract

A solar cell module and a method for manufacturing same, an assembly, and a system. The solar cell module comprises solar cell pieces and a back plate (5); metal conductive plates (41, 42, 43, 44) are embedded on the back plate; the solar cell pieces comprise P type solar cell substrates (2) and N type solar cell substrates (1) which are alternately arranged; a negative electrode on the front surface of each P type solar cell substrate is connected to a positive electrode on the front surface of each N type solar cell substrate by means of a metal wire (3); the solar cell pieces are disposed on the metal conductive plates. Also disclosed are a method for manufacturing the solar cell module, a solar cell assembly comprising the solar cell module, and a solar cell system. According to the solar cell module, solder strips are not needed for connection, such that material and device costs are reduced; silver busbars and fingers used in the prior art can be replaced with metal wires, such that shading losses on the front surfaces are decreased, costs of using silver containing paste are reduced, and the consumption of silver containing paste may be reduced by about 50%. No welding operation is used for the positive electrodes and negative electrodes of the cell pieces, such that the production operation is simplified, the production efficiency is improved, and the breakage rate is reduced.

Description

Solar battery module and preparation method, component and system thereof

Technical field

The present invention relates to the field of solar cell technologies, and in particular, to a solar cell module, a preparation method thereof, a component, and a system.

Background technique

A solar cell is a semiconductor device that converts solar energy into electrical energy. Among them, metallization is a key step in the production process of solar cells, and photogenerated carriers must be efficiently collected by the conductive electrodes formed by metallization. At present, the most common metallization method for mass production of solar cells is the screen printing metal paste method, which is formed by printing silver paste or aluminum-doped silver paste through high-temperature sintering process to form functions such as electrical contact, electrical conduction, and solder interconnection. Metalization. In order to form good ohmic contact and balance weldability, the front surface of the solar cell is generally printed with silver paste or aluminum-doped silver paste, but the price of silver paste or aluminum-doped silver paste is generally expensive, resulting in silver-containing paste in the solar cell. The proportion of manufacturing costs remains high. Therefore, it is a key task to reduce the production cost of solar cells by finding a front metallization method that can reduce the amount of silver-containing slurry used while satisfying ohmic contact.

In addition, a large-area back aluminum electrode is provided on the back surface of a conventional P-type solar cell, but in order to meet the solderability requirements, a silver-containing back main gate electrode must be disposed therein, and the cost of the silver-containing paste is much higher than that of the aluminum paste. . If the back of the battery does not need to be soldered, the silver-backed main gate electrode can be eliminated, and the all-aluminum back electrode can be used, which not only reduces the cost but also increases the open circuit voltage of the battery.

A single-cell solar cell cannot be directly used as an energy source, and a plurality of single-cell batteries must be connected in series and tightly sealed to form a component to stably output electric energy. At present, the method of connecting the cells in series is to use a solder ribbon to solder the electrodes on the front and back sides of the adjacent cells, and performing two soldering operations on the cell not only reduces the yield but also causes a high fragmentation rate.

Summary of the invention

The purpose of the present invention is to provide a solar cell module and a system thereof for the deficiencies of the prior art. The method and the component and the system, the solar cell module of the invention can significantly reduce the use amount of the silver-containing slurry, reduce the production cost of the solar cell, increase the open circuit voltage of the solar cell, and simultaneously, in the process of connecting the cell sheets in series, The positive and negative electrodes of the cell have no soldering operation, which not only simplifies the production operation, increases the yield, but also reduces the fragmentation rate.

The solar cell module provided by the invention has the technical solutions of:

A solar cell module comprising a solar cell module and a back plate, the metal plate is embedded in the back plate, and the solar cell module comprises a P-type solar cell substrate and an N-type solar cell substrate alternately arranged, and the P-type solar cell substrate is in front of the substrate. The negative electrode of the surface is connected to the positive electrode of the front surface of the N-type solar cell substrate; the solar cell module is disposed on the metal conductive plate.

Wherein, the metal conductive plate is an aluminum plate or a copper plate.

Wherein, the interval between the P-type solar cell substrate and the N-type solar cell substrate is no more than 5 mm.

Wherein, the positioning device is arranged on the back plate.

The N-type solar cell substrate includes a front surface positive electrode, a front surface passivation anti-reflection film, a p+ doped region, an N-type crystalline silicon substrate, an n+ doped region, a back surface passivation film, and a back surface, in order from top to bottom. The negative electrode; the P-type solar cell substrate includes a front surface negative electrode, a front surface passivation anti-reflection film, an n+ doped region, a P-type crystalline silicon substrate, and a back surface all-aluminum back from top to bottom.

electrode.

Wherein the negative electrode of the front surface of the P-type solar cell substrate and the positive electrode of the front surface of the N-type solar cell substrate are connected by a wire, and the negative electrode of the front surface of the P-type solar cell substrate comprises a segmented sub-gate and is disposed at a thermally conductive layer on the segmented sub-gate, the segmented sub-gate electrically connected to a doped region of a front surface of the P-type solar cell substrate; the wire is electrically connected to the heat-sensitive conductive layer; The positive electrode of the front surface of the solar cell substrate includes a segmented sub-gate and a heat-sensitive conductive layer disposed on the segmented sub-gate, the segmented sub-gate electrically connected to the doped region of the front surface of the N-type solar cell substrate; A wire is electrically connected to the heat sensitive conductive layer.

Among them, the wire is provided with 60-120 wires, and the wire is tin-coated copper wire, tin-coated aluminum wire or tin-coated steel wire. In any of the above, the wire has a diameter of 40-80 microns.

The solar cell module includes at least two solar cell modules and a first metal conductive plate, a second metal conductive plate, a third metal conductive plate, and a fourth metal conductive plate disposed in sequence on the back plate, first The metal conductive plate and the second metal conductive plate are insulated from each other, the third metal conductive plate and the fourth metal conductive plate are insulated from each other, and the second metal conductive plate and the third metal conductive plate are electrically connected to each other; the solar battery module The utility model comprises a P-type solar cell substrate and an N-type solar cell substrate, wherein the negative electrode of the front surface of the P-type solar cell substrate and the positive electrode of the front surface of the N-type solar cell substrate are connected by a wire; wherein the front surface of one of the solar cell modules is upward The first metal conductive plate and the second metal conductive plate are disposed, and the front surface of the other solar cell module is placed upward on the third metal conductive plate and the fourth metal conductive plate.

The invention also provides a preparation method of a solar cell module, comprising the following steps:

(1) placing an N-type solar cell substrate and a P-type solar cell substrate side by side, then laying a wire, and obtaining a solar cell module after heat treatment;

(2) Selecting a back plate embedded with a metal conductive plate, a plurality of metal conductive plates embedded in the back plate, and insulating or electrically conducting the plurality of metal conductive plates according to the structure of the solar battery module, and then placing the solar battery module A solar cell module is obtained on a back plate in which a metal conductive plate is embedded.

Wherein, in the step (1), the wire connects the front surface negative electrode of the P-type solar cell substrate and the positive electrode of the front surface of the N-type solar cell substrate through the heat-sensitive conductive layer on the surface of the cell sheet.

Wherein, in the step (1), the temperature of the heat treatment is 183 to 250 °C.

The invention also provides a solar cell module comprising a front layer material, a packaging material and a solar cell module which are sequentially connected from top to bottom, and the solar cell module is the above-mentioned solar cell module.

The present invention also provides a solar cell system comprising more than one solar cell module, the solar cell module being a solar cell module as described above.

Implementations of the invention include the following technical effects:

The technical effects of the present invention are mainly embodied in: 1. Each battery module is composed of a P-type solar cell and an N-type solar cell, wherein a negative electrode of the P-type solar cell and a positive electrode of the N-type solar cell pass Wire connection. The use of wire has the following two advantages: 1) no need to use the ribbon connection, saving the cost of materials and equipment; 2) the wire can replace the silver main grid and the secondary grid used in the prior art, which reduces the front shading loss and reduces the The use cost of the silver-containing slurry can save about 50% of the silver-containing slurry consumption compared to the existing front metallization process. At the same time, the P-type solar cell replaces the existing silver back electrode and the back aluminum electrode structure with an all-aluminum back electrode, which not only reduces the use cost of the silver-containing paste but also increases the open circuit voltage of the battery. 2. The existing backplane is replaced by a backplane embedded with a metal conductive plate, and the battery module is placed on the metal conductive plate, and the metal conductive plates of the adjacent battery modules are connected to each other to complete the series connection between the battery modules. Repeat this step to get the solar cell module. By using the tandem method of the present invention, the positive and negative electrodes of the battery sheet are not welded, which not only simplifies the production operation, improves the production efficiency, but also reduces the fragmentation rate.

DRAWINGS

1 is a schematic front view of a battery module in a solar cell module according to an embodiment of the invention.

2 is a schematic cross-sectional view of a battery module in a solar cell module according to an embodiment of the present invention.

3 is a partial schematic view of a back plate embedded with a metal conductive plate in a solar cell module according to an embodiment of the invention.

4 is a partial schematic view of a solar cell module according to an embodiment of the invention.

FIG. 5 is a partial cross-sectional view showing a solar cell module according to an embodiment of the present invention.

FIG. 6 is a schematic diagram of a regularly arranged non-continuous dot-shaped segmented sub-gate in a solar cell module according to an embodiment of the invention.

FIG. 7 is a schematic diagram of a non-continuous dot-shaped segmented sub-gate arranged in a misaligned manner in a solar cell module according to an embodiment of the present invention.

FIG. 8 is a schematic diagram of a laterally arranged non-continuous line segmented sub-gate in a solar cell module according to an embodiment of the invention.

FIG. 9 is a schematic diagram of a non-continuous line segmentation pair arranged vertically in a solar cell module according to an embodiment of the present invention; Schematic diagram of the grid.

1. N-type solar cell substrate; 2. P-type solar cell substrate; 3. Metal wire; 31, N-segment sub-gate; 32, P-segment sub-gate; 33, heat-sensitive conductive layer; 41, first metal conductive a plate; 42, a second metal conductive plate; 43, a third metal conductive plate; 44, a fourth metal conductive plate; 5, a back plate.

detailed description

The invention will be described in detail below with reference to the embodiments and the accompanying drawings, which are to be understood that the described embodiments are only intended to facilitate the understanding of the invention.

The solar cell module in this embodiment refers to a back sheet including a metal conductive plate embedded therein and a solar cell sheet connected thereto.

As shown in FIG. 1 to FIG. 5, a solar cell module of the present embodiment includes a solar cell module and a back plate 5, and a metal conductive plate is embedded on the back plate 5, and the metal conductive plate may be an aluminum plate or a copper plate. The solar cell module includes a P-type solar cell substrate 2 and an N-type solar cell substrate 1 which are alternately arranged, and a negative electrode of a front surface of the P-type solar cell substrate 2 is connected with a positive electrode of a front surface of the N-type solar cell substrate 1; Set on a metal conductive plate. Preferably, the back plate 5 embedded with the metal conductive plate is provided with a positioning device for placing the battery module, so as to facilitate the installation of the positioning battery module. The interval between the P-type solar cell substrate 2 and the N-type solar cell substrate 1 is not more than 5 mm. In the above solar cell module, a back plate embedded with a metal conductive plate is used to replace the existing back plate, and the battery module is placed on the metal conductive plate, and the metal conductive plates of the adjacent battery modules are connected to each other to complete the battery module. In tandem, repeat this step to get the solar cell module. The positive and negative electrodes of the cell have no soldering operation, which not only simplifies the production operation, but also improves the production efficiency and reduces the fragmentation rate.

Referring to FIGS. 1 and 5, the negative electrode on the front surface of the P-type solar cell substrate 2 and the positive electrode on the front surface of the N-type solar cell substrate 1 are connected by a wire 3, and the negative electrode on the front surface of the P-type solar cell substrate 2 includes a P-segmented sub-gate 32 and a thermally conductive layer 33 disposed on the P-segmented sub-gate 32, the P-segmented sub-gate 32 being electrically connected to the doped region of the front surface of the P-type solar cell substrate 2; the wire 3 and the heat The sensitive conductive layer 33 is electrically connected; the positive electrode of the front surface of the N-type solar cell substrate includes an N-segment sub-gate 31 and a heat-sensitive conductive layer 33 disposed on the N-segment sub-gate 31, and the N-segment sub-gate 31 and the N-type Solar power The doped regions of the front surface of the cell substrate are electrically connected; the wires 3 are electrically connected to the heat-sensitive conductive layer 33. The heat-sensitive conductive layer 33 is a solder paste conductive layer, the metal wire 3 is a metal wire coated with a heat-sensitive conductive material, and the wire coated with the heat-sensitive conductive material may be selected from a tin-coated copper wire, a silver-coated copper wire, or a tin-coated aluminum wire. Or any one of tin-coated steel wires, the solder paste containing any one of tin, tin-lead alloy, tin-bismuth alloy or tin-lead-silver alloy.

In the solar cell module of the present embodiment, a total of 60-120 wires 3 are provided, and the wire 3 has a diameter of 40-80 μm. The use of wire has the following two advantages: 1) no need to use the ribbon connection, saving the cost of materials and equipment; 2) the wire can replace the silver main grid and the secondary grid used in the prior art, which reduces the front shading loss and reduces the The use cost of the silver-containing slurry can save about 50% of the silver-containing slurry consumption compared to the existing front metallization process. The solar cell module of the present embodiment, any two adjacent solar cell substrates, one of which is a P-type solar cell substrate 2, the other is an N-type solar cell substrate 1, and the front surface of the N-type solar cell substrate 1 is a positive electrode The back surface is a negative electrode; the front surface of the P-type solar cell substrate 2 is a negative electrode, and the back surface is a positive electrode; the positive electrode of the N-type solar cell substrate 1 and the negative electrode of the P-type solar cell substrate 2 are connected by a wire 3 .

Referring to FIG. 4 and FIG. 5, preferably, the solar cell module includes at least two solar cell modules and a first metal conductive plate 41, a second metal conductive plate 42, and a third metal conductive plate disposed in sequence on the back plate 5. 43 and the fourth metal conductive plate 44, the first metal conductive plate 41 and the second metal conductive plate 42 are insulated from each other, and the third metal conductive plate 43 and the fourth metal conductive plate 44 are insulated from each other, and the second metal conductive plate is insulated from each other. 42 is electrically connected to the third metal conductive plate 43; the solar cell module comprises a P-type solar cell substrate 2 and an N-type solar cell substrate 1, a negative electrode of the front surface of the P-type solar cell substrate 2, and an N-type solar cell The positive electrode of the front surface of the substrate 1 is connected by the wire 3; one of the front surfaces of the solar cell module is placed upward on the first metal conductive plate 41 and the second metal conductive plate 42, and the front surface of the other solar cell module is placed upward. The three metal conductive plates 43 and the fourth metal conductive plate 44 are on. In this embodiment, the N-type solar cell substrate 1 includes, in order from top to bottom, a front surface passivation anti-reflection film, a p+ doped region, an N-type crystalline silicon substrate, an n+ doped region, a back surface passivation film, and a back surface silver. The P-type solar cell substrate 2 includes, in order from top to bottom, a front surface passivation anti-reflection film, an n+ doped region, a P-type crystalline silicon substrate, and a back surface all-aluminum back electrode. P-type solar cells use all aluminum The back electrode replaces the existing silver back electrode and the back aluminum electrode structure, which not only reduces the use cost of the silver-containing paste but also increases the open circuit voltage of the battery.

Referring to FIG. 1 to FIG. 9 , a method for preparing a solar cell module of the embodiment includes the following steps:

(1) Preparing a solar cell module. First, an N-type solar cell substrate 1 and a P-type solar cell substrate 2 are prepared. The N-type solar cell substrate 1 and the P-type solar cell substrate 2 may be a whole piece or a non-whole piece. The N-type solar cell substrate 1 includes, in order from top to bottom, a front surface passivation anti-reflection film, a p+ doped region, an N-type crystalline silicon substrate, an n+ doped region, a back surface passivation film, and a back surface silver electrode. The P-type solar cell substrate 2 includes a front surface passivation anti-reflection film, an n+ doped region, a P-type crystalline silicon substrate and a back surface aluminum electrode in order from top to bottom, and the back surface aluminum electrode covers the entire back surface (all-aluminum back electrode) ). Both the back silver electrode of the N-type solar cell substrate 1 and the back aluminum electrode of the P-type solar cell substrate 2 were printed and dried, and no sintering treatment was performed. Then, the N-segment sub-gate 31 is printed on the front surface of the N-type solar cell substrate 1 using an aluminum-doped silver paste, and the P-segmented sub-gate 32 is printed on the front surface of the P-type solar cell substrate 2 using a silver paste. The shape of the N-segment sub-gate 31 and the P-segment sub-gate 32 in this embodiment may be discontinuous dots or discontinuous lines. As shown in FIG. 6, the discontinuous dots in the adjacent segmented sub-gates may be a regular array, or as shown in FIG. 7, the discontinuous dots in the adjacent segmented sub-gates are misaligned. As shown in Figure 8, the discontinuous lines in adjacent segmented sub-gates can be horizontally regular arrays. As shown in FIG. 9, the discontinuous lines in the adjacent segmented sub-gates are longitudinally regular arrays; the discontinuous lines in adjacent segmented sub-gates may also be misaligned. Sintering is carried out after the printing is completed, and the sintering peak temperature is 850-950 °C. After the sintering is completed, the temperature-sensitive conductive layer 33 is printed on the N-segment sub-gate 31 and the P-segment sub-gate 32. The heat conductive layer 33 is a solder paste. The solder paste contains any one of tin, tin-lead alloy, tin-bismuth alloy or tin-lead-silver alloy. Then, the N-type solar cell substrate 1 and the P-type solar cell substrate 2 are placed side by side on a table, and the wire 3 is laid on the heat-sensitive conductive layer 33 on the front surface. The wire 3 is any one of a tin-clad copper wire, a tin-clad aluminum wire, or a tin-clad steel wire. The wires 3 are parallel to each other, and a total of 60-120 strips are provided, and the cross section is circular, and the diameter thereof is 40-80 μm. Finally, the N-type solar cell substrate 1 and the P-type solar cell substrate 2 connected by the wire 3 are heat-treated. In this embodiment, the heat treatment is infrared heating, and the peak temperature of the reflux is 183-250 degrees Celsius. After the heat treatment, an ohmic contact is formed between the p+ doped region of the front surface of the N-type solar cell substrate 1, the N-segment sub-gate 31, the heat-sensitive conductive layer 33, and the wire 3, and the front surface of the P-type solar cell substrate 2 An ohmic contact is formed between the n+ doped region, the P segmented sub-gate 32, the thermistive conductive layer 33, and the wire 3, that is, the fabrication of the battery module of the present invention is completed. The completed battery module is shown in Figure 1, and its cross-sectional view is shown in Figure 2.

(2) Select the backing plate 5 in which the metal conductive plate is embedded. As shown in FIG. 3, the first metal conductive plate 41, the second metal conductive plate 42, the third metal conductive plate 43, and the fourth metal conductive plate 44 are sequentially disposed on the back plate 5. The first metal conductive plate 41 and the second metal conductive plate 42 are insulated from each other, and the third metal conductive plate 43 and the fourth metal conductive plate 44 are insulated from each other, and the second metal conductive plate 42 and the third metal conductive plate are insulated from each other. 43 is conductive to each other. The front surface of the first battery module is placed upward on the first metal conductive plate 41 and the second metal conductive plate 42, and the front surface of the second battery module is placed upward on the third metal conductive plate 43 and the fourth metal conductive plate 44. Upper (as shown in Figures 4 and 5). In this way, the interconnection between the two battery modules is realized, and the solar battery module in which a plurality of battery modules are connected in series is obtained by repeating this step. The backplane embedded with the metal conductive plate and the battery module connected thereto form the solar battery module described in this embodiment.

The embodiment further provides a solar cell module, which comprises a front layer material, a packaging material and a solar cell module which are sequentially connected from top to bottom, and the solar cell module is the above-mentioned solar cell module. The structure and working principle of the solar cell module of the present embodiment use techniques well known in the art, and the improvement of the solar cell module provided by the present invention relates only to the above-mentioned solar cell module, and no other parts are modified. Therefore, this specification only details the solar cell module and its preparation method. Other components and working principles of the solar cell module will not be described herein. The solar cell module of the present invention can be realized by those skilled in the art based on the contents described in the present specification.

The embodiment further provides a solar cell system comprising more than one solar cell module connected in series, and the solar cell module is a solar cell module as described above. The structure and working principle of the solar cell system of the present embodiment use techniques well known in the art, and the solar cell system provided by the present invention The improvement is only related to the above solar cell module, and no other parts are modified. Therefore, this specification only details the solar cell module and its preparation method. Other components and working principles of the solar cell system will not be described here. The solar cell system of the present invention can be realized by those skilled in the art based on the contents described in the present specification.

It should be noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and are not intended to limit the scope of the present invention. Although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand The technical solutions of the present invention may be modified or equivalently substituted without departing from the spirit and scope of the technical solutions of the present invention.

Claims

A solar cell module comprising a solar cell module and a back plate, wherein the back plate is embedded with a metal conductive plate, wherein the solar cell module comprises a P-type solar cell substrate and an N-type solar cell which are alternately arranged with each other. a substrate, a negative electrode of a front surface of the P-type solar cell substrate is connected to a positive electrode of a front surface of the N-type solar cell substrate; and the solar cell module is disposed on the metal conductive plate.
A solar cell module according to claim 1, wherein the metal conductive plate is an aluminum plate or a copper plate.
The solar cell module according to claim 1, wherein an interval between the P-type solar cell substrate and the N-type solar cell substrate is no more than 5 mm.
A solar cell module according to claim 1, wherein the backing plate is provided with positioning means.
The solar cell module according to claim 1, wherein the N-type solar cell substrate comprises a front surface positive electrode, a front surface passivation anti-reflection film, a p+ doped region, and a N from top to bottom. a crystalline silicon substrate, an n+ doped region, a back surface passivation film, and a back surface negative electrode; the P-type solar cell substrate includes a front surface negative electrode, a front surface passivation anti-reflection film, and n+ doping from top to bottom The region, the P-type crystalline silicon substrate and the back surface all aluminum back electrode.
The solar cell module according to any one of claims 1 to 5, wherein the negative electrode of the front surface of the P-type solar cell substrate and the positive electrode of the front surface of the N-type solar cell substrate pass through the wire Connecting, the negative electrode of the front surface of the P-type solar cell substrate comprises a segmented sub-gate and a heat-sensitive conductive layer disposed on the segmented sub-gate, the doped sub-gate and the doping of the front surface of the P-type solar cell substrate Electrically connecting, the wire is electrically connected to the heat-sensitive conductive layer; the positive electrode of the front surface of the N-type solar cell substrate comprises a segmented sub-gate and a heat-sensitive conductive layer disposed on the segmented sub-gate The segmented sub-gate is electrically connected to a doped region of a front surface of the N-type solar cell substrate, and the wire is electrically connected to the heat-sensitive conductive layer.
A solar cell module according to claim 6, wherein said metal wire A total of 60-120 strips are provided, and the wire is any one of tin-coated copper wire, tin-coated aluminum wire or tin-coated steel wire, and the wire has a diameter of 40-80 micrometers.
The solar cell module according to any one of claims 1 to 5, wherein the solar cell module comprises at least two solar cell modules and a first metal conductive plate disposed in sequence on the back plate, a second metal conductive plate, a third metal conductive plate and a fourth metal conductive plate, wherein the first metal conductive plate and the second metal conductive plate are insulated from each other, the third metal conductive plate and the fourth The metal conductive plates are insulated from each other, and the second metal conductive plate and the third metal conductive plate are electrically connected to each other; the solar cell module comprises a P-type solar cell substrate and an N-type solar cell substrate. a negative electrode of a front surface of the P-type solar cell substrate and a positive electrode of a front surface of the N-type solar cell substrate are connected by a wire; a front surface of one of the solar cell modules is placed upward on the first metal conductive plate and On the second metal conductive plate, another front surface of the solar cell module is placed upward on the third metal conductive plate and the fourth metal conductive plate.
A method for preparing a solar cell module, comprising: the following steps:

(1) placing an N-type solar cell substrate and a P-type solar cell substrate side by side, then laying a wire, and obtaining a solar cell module after heat treatment;

(2) selecting a back plate embedded with a metal conductive plate, wherein the plurality of metal conductive plates are embedded in the back plate, and the plurality of metal conductive plates are insulated or electrically connected according to the structure of the solar battery module, and then the solar battery is The module is placed on a back plate embedded with a metal conductive plate to obtain a solar cell module.
The method for fabricating a solar cell module according to claim 9, wherein in the step (1), the wire passes the negative electrode of the front surface of the P-type solar cell substrate through the heat-sensitive conductive layer on the surface of the cell sheet. The positive electrodes of the front surface of the N-type solar cell substrate are connected.
The method of manufacturing a solar cell module according to claim 9, wherein in the step (1), the temperature of the heat treatment is 183 to 250 °C.
A solar cell module comprising a front layer material, a packaging material, and a solar cell module connected in sequence from top to bottom, wherein the solar cell module is a solar energy according to any one of claims 1-8 Battery module.
A solar cell system comprising more than one solar cell module, characterized in that the solar cell module is a solar cell module according to claim 12.