CN209804676U

CN209804676U - Solar cell panel

Info

Publication number: CN209804676U
Application number: CN201920972943.9U
Authority: CN
Inventors: 余惠传
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2019-12-17
Anticipated expiration: 2029-06-26

Abstract

the embodiment of the utility model discloses a solar cell panel, wherein solar cell panel includes solar wafer, with the PCB board of solar wafer bottom surface bonding, the PCB board surface is provided with the pad of the metal lines that corresponds solar wafer, the pad corresponds and is connected each other with two or more adjacent negative electrode leg of solar wafer negative pole, two or more positive electrode legs that correspond with the negative electrode leg are connected each other, make solar wafer form two or more parallelly connected subgroups; the parallel groups are connected in series through copper foil connecting bridges which are arranged on the back surface of the PCB and correspond to the parallel groups, and the back surface of the PCB is also provided with a positive voltage output end and a negative voltage output end. The solar cell panel of the utility model can output different voltages and currents to meet different requirements; and a plurality of chips are not connected in series or in parallel, so that gaps among the chips are avoided, the chip mounting process is reduced, the production efficiency is improved, and the attractiveness is improved.

Description

Solar cell panel

Technical Field

The utility model relates to the field of electronic technology, especially, relate to a solar cell panel.

Background

At present, solar panels are widely used for outdoor landscape lamps, solar fountains, solar mobile power supplies and the like, the sizes of the solar panels cannot be overlarge in the fields, and the solar panels are used as core components and are the components with the highest value in a system, and the quality of the solar panels also needs to be guaranteed to a certain extent.

The single voltage of a common solar cell is between 0.50 and 0.68V, the solar cell cannot be directly used on a product, and a plurality of solar cells are required to be connected in series and in parallel, so that series welding is required to be carried out between the solar cells, most of the conventional solar cells are welded by welding strips on the front surface and the back surface, and the welding mode easily causes phenomena of false welding, open circuit, short circuit and the like. When solar cells are connected in series, gaps can be generated among the cells, and a plurality of patches are needed, so that the defects of low efficiency, large appearance color difference, unattractive appearance and the like are caused.

In addition, there are also some parts that use SMT patch processes, but also such things as: the paster shifts, crosses circumstances such as stove PCB board and battery piece deformation, and just need carry out the multi-disc paster when the multi-disc is established ties, has increased SMT's process number of times and production efficiency to a certain extent.

Disclosure of Invention

in order to solve the problem that exists among the above-mentioned prior art, the embodiment of the utility model provides a solar cell panel and paster method's design, wherein the embodiment of the utility model provides a solar cell panel can satisfy different demands to this solar cell panel's paster method can reduce the paster process and improve production efficiency, in addition, also can improve solar cell panel's pleasing to the eye degree.

On the one hand, the embodiment of the utility model provides a solar cell panel, include:

Solar wafer, with the PCB board of solar wafer bottom surface bonding, PCB board surface is provided with the pad that corresponds solar wafer's metal lines, its characterized in that: the welding pad is correspondingly connected with two or more adjacent negative electrode welding feet of the negative electrode of the solar cell piece, and two or more positive electrode welding feet corresponding to the negative electrode welding feet are connected with each other, so that the solar cell piece forms two or more parallel groups; the parallel groups are connected in series through copper foil connecting bridges which are arranged on the back surface of the PCB and correspond to the parallel groups, and the back surface of the PCB is also provided with a positive voltage output end and a negative voltage output end.

Furthermore, both sides of the solar cell piece are negative electrodes, and the number of the negative electrodes is one more than that of the positive electrodes.

Furthermore, the back surface of the PCB is provided with a regulating resistor group which is connected with the copper foil connecting bridge and used for regulating the output voltage of the solar cell; the adjusting resistor group comprises a first adjusting resistor, a second adjusting resistor and a third adjusting resistor; one of them design for opening circuit of copper foil connecting bridge to will through first adjusting resistor the intercommunication that opens circuit, the copper foil connecting bridge that opens circuit passes through the second adjusting resistor with the link of solar wafer negative pole end and is connected with negative pole voltage output end, passes through the third adjusting resistor with the link of solar wafer positive terminal and is connected with positive pole voltage output end.

Further, the contact point width of the welding pad is smaller than the metal wire width of the solar cell piece.

Further, the width of each contact point is 0.2-0.24 mm, and the length of each contact point is 3-5 mm.

Further, the surface of the PCB is coated with matte black oil for insulation treatment.

to sum up, the utility model discloses following beneficial effect has: (1) the solar panel can output different voltages and currents according to the needs, so that different requirements are met; (2) the solar cell panel forms a whole through the patch, and a plurality of solar cells are not connected in series or in parallel, so that the patch process is reduced, and the production efficiency is improved; (3) the solar cell panel is composed of single solar cells, and no gap exists between the solar cells, so that the attractiveness is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is the embodiment of the present invention, which illustrates an assembly structure of a solar cell panel.

Fig. 2 is a schematic diagram of a top layer structure of the PCB board according to the embodiment of the present invention.

Fig. 3 is a schematic view of the bottom structure of the PCB board according to the embodiment of the present invention.

Fig. 4 is a schematic view of a solar cell according to an embodiment of the present invention.

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 some, not all, of the embodiments of the present invention. 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.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Referring to fig. 1 and 4, an embodiment of the present invention provides a solar cell panel, including a solar cell 1 and a PCB 2 bonded to a bottom surface of the solar cell 1, wherein a bonding pad 21 corresponding to a metal line 11 of the solar cell 1 is disposed on a surface of the PCB 2.

Referring to fig. 2 and 3, the bonding pads 21 on the surface of the PCB 2 are correspondingly connected to two or more adjacent negative electrode bonding feet 211 of the negative electrode of the solar cell 1, and two or more positive electrode bonding feet 212 corresponding to the negative electrode bonding feet 211 are connected to each other, so that the solar cell 1 forms two or more parallel groups; the parallel groups are connected in series through copper foil connecting bridges 23 which are arranged on the back surface of the PCB 2 and correspond to the parallel groups, and the back surface of the PCB 2 is also provided with a positive voltage output end 24 and a negative voltage output end 25; the two sides of the solar cell piece 1 are fixedly provided with cathodes, the number of the cathodes is one more than that of the anodes, and the back of the PCB 2 is provided with an adjusting resistor group which is connected with the copper foil connecting bridge 23 and used for adjusting the output voltage of the solar cell piece 1.

The adjusting resistor groups respectively comprise a first adjusting resistor 26, a second adjusting resistor 27 and a third adjusting resistor 28. One of the copper foil connecting bridges 23 is designed to be an open circuit, and the open circuit is communicated through a first adjusting resistor 26; the connection end of the broken copper foil connection bridge 23 and the negative electrode end of the solar cell piece 1 is connected with the negative electrode voltage output end 25 through a second adjusting resistor 27, and the connection end of the broken copper foil connection bridge and the positive electrode end of the solar cell piece 1 is connected with the positive electrode voltage output end 24 through a third adjusting resistor 28.

When the solar cell panel is specifically implemented, the surface of the PCB 2 is coated with matte black oil for insulation treatment, the contact point width of the welding pad 21 of the PCB 2 is smaller than the width of the metal wire 11 of the solar cell panel 1, the width of the metal wire 11 on the solar cell panel 1 is 0.3mm, the width of each contact point is 0.2-0.24 mm, and the length is 3-5 mm; the length of the solar cell piece 1 is 98.2mm, the width is 61.5mm, the thickness is 0.2mm, 51 positive electrode welding feet and 52 negative electrode welding feet are arranged on the surface welding plate 21 of the PCB 2 of the solar cell piece 1, each 5 pairs of positive electrode welding feet and each 5 pairs of negative electrode welding feet are connected in parallel to form one cell, the total number is 10, and each pair of positive electrode welding feet and each pair of negative electrode welding feet can form a 0.5-0.68V cell; and connect 10 batteries in series through the copper foil connecting bridge 23 that sets up at the PCB board 2 back, utilize the adjusting resistor group who sets up on copper foil connecting bridge 23 to set up different connections or disconnection and obtain different output voltage: the second adjusting resistor and the third adjusting resistor are disconnected by connecting the first adjusting resistor, so that 5-6V voltage can be output; the second adjusting resistor and the third adjusting resistor are connected, the first adjusting resistor is disconnected, and 2.5-3V voltage can be output, so that different requirements are met.

By the above, the embodiment of the utility model provides a solar cell panel can export different voltage and electric current as required, satisfy different demands to solar cell panel passes through the paster and constitutes a whole, and not there is the multi-disc to establish ties or parallelly connected, reduced paster process, improvement production efficiency.

The embodiment of the application further provides a solar panel pasting method, and the method comprises the steps of S101-S104.

S101, selecting a steel mesh, horizontally placing the steel mesh on one side of the PCB where the bonding pad is designed, and brushing the PCB with low-temperature solder paste through the steel mesh by using the low-temperature solder paste.

s102, fixing the PCB brushed with the low-temperature solder paste on a tool clamp, sucking the solar cell by using a suction nozzle on a chip mounter, and moving the solar cell to a chip mounting position, wherein the binding surface of the solar cell is on the same side with the front surface of the PCB.

And S103, comparing and correcting the PCB and the solar cell by using a vision correction system on the chip mounter, and mounting the chip.

And S104, sending the PCB pasted with the solar cell into a reflow soldering machine for reflow soldering.

In order to prevent the phenomena of false tin and insufficient soldering caused by too much or too little solder paste, the thickness of the steel mesh in the steps is 0.12-0.14 mm; adopt low temperature tin cream and temperature 138 ~ 155 ℃, in the above-mentioned step reflow soldering's heating temperature is 150 ~ 175 ℃, in order to avoid during reflow soldering PCB board and solar wafer heating deformation, will heat the PCB board back to set up frock clamp cover on solar wafer, play and carry out the effect of shade protection to solar wafer, above-mentioned solar cell panel comprises monolithic solar wafer, does not have the gap between piece and the piece, increases pleasing to the eye degree.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. the utility model provides a solar cell panel, includes solar wafer, with the PCB board of solar wafer bottom surface bonding, the PCB board surface is provided with the pad of the metal lines that corresponds solar wafer, its characterized in that:

The welding pad is correspondingly connected with two or more adjacent negative electrode welding feet of the negative electrode of the solar cell piece, and two or more positive electrode welding feet corresponding to the negative electrode welding feet are connected with each other, so that the solar cell piece forms two or more parallel groups;

The parallel groups are connected in series through copper foil connecting bridges which are arranged on the back surface of the PCB and correspond to the parallel groups, and the back surface of the PCB is also provided with a positive voltage output end and a negative voltage output end.

2. The solar panel of claim 1, wherein the solar cell sheet has negative electrodes on both sides, and the number of negative electrodes is one more than the number of positive electrodes.

3. The solar panel according to claim 2, wherein the back of the PCB is provided with a regulating resistor group connected with the copper foil connecting bridge for regulating the output voltage of the solar cell;

The adjusting resistor group comprises a first adjusting resistor, a second adjusting resistor and a third adjusting resistor;

One of them design for opening circuit of copper foil connecting bridge to will through first adjusting resistor the intercommunication that opens circuit, the copper foil connecting bridge that opens circuit passes through the second adjusting resistor with the link of solar wafer negative pole end and is connected with negative pole voltage output end, passes through the third adjusting resistor with the link of solar wafer positive terminal and is connected with positive pole voltage output end.

4. The solar panel of claim 3, wherein: the contact point width of the welding disc is smaller than the metal wire width of the solar cell.

5. The solar panel of claim 4, wherein: the width of each contact point is 0.2-0.24 mm, and the length of each contact point is 3-5 mm.

6. The solar cell panel according to claim 5, wherein the PCB panel is coated on its surface with a matte black oil for insulation treatment.