阅读说明：本技术 一种光伏组件生产的叠层拼接方法 (Lamination splicing method for photovoltaic module production ) 是由 童彦文 于 2020-12-07 设计创作，主要内容包括：本发明公开了一种光伏组件生产的叠层拼接方法,包括以下步骤：首先对需要使用的隔离EVA、隔璃背板以及电池片进行检查,检查隔离EVA与隔璃背板的表面有无瑕疵或油垢,若存在瑕疵或油垢,需进行清理,并检查电池片的表面有无虚焊或者裂纹,若存在虚焊或者裂纹,需进行更换,本发明通过在进行光伏组件叠层拼接工序之前,利用离子体发生器电离空气所产生的射流对隔离EVA与隔璃背板的正反面进行清洁处理,从而能够保证隔离EVA与隔璃背板的表面无油污,从而极大的提高了实际的使用效果,同时通过设置电池片焊接工序,能够预先自由选择电池片或者电池串的正负极首尾连接关系,从而有利于光伏组件的后续加工以及使用。(The invention discloses a lamination splicing method for photovoltaic module production, which comprises the following steps: the method comprises the steps of firstly, checking isolation EVA, a glass back plate and a cell piece which need to be used, checking whether flaws or oil dirt exist on the surface of the isolation EVA and the glass back plate, if the flaws or the oil dirt exist, cleaning, checking whether rosin joint or cracks exist on the surface of the cell piece, and if the rosin joint or the cracks exist, replacing the cell piece.)

1. A lamination splicing method for photovoltaic module production is characterized by comprising the following steps:

s1, firstly, checking isolation EVA, a glass back plate and a battery piece which need to be used, checking whether flaws or oil dirt exist on the surfaces of the isolation EVA and the glass back plate, if the flaws or the oil dirt exist, cleaning, checking whether a rosin joint or a crack exists on the surface of the battery piece, and if the rosin joint or the crack exists, replacing;

s2, welding a plurality of battery pieces to form a battery string, placing the welded battery string on the isolated EVA after inspection, and welding the bus bars at the head and the tail;

s3, taking one of the isolating EVA bars, picking up the two short bus bars by hand, positioning the opening part of the isolating EVA bars below the two long bus bars, positioning the rest parts below the two short bus bars, adjusting the position of the isolating EVA according to the position between the long bus bars and the short bus bars to enable the opening part to exceed the glass edge by 3 +/-2 mm, taking one of the glass back plates, picking up the two short bus bars by hand, positioning the opening part of the glass back plate below the two long bus bars, positioning the rest parts below the two short bus bars, adjusting the position of the glass back plate according to the position between the long bus bars and the short bus bars to enable the glass back plate to be 3 +/-2 mm away from the glass edge;

s4, taking a proper amount of high-temperature adhesive tape, and fixing the bus bar on the isolation backboard;

s5, an operator takes a new isolated EVA after inspection from the turnover frame through head-to-tail matching and lays the isolated EVA on glass;

s6, folding up the isolation EVA, carrying out primary opening trimming on the isolation EVA, then loosening the folded isolation EVA, and carrying out secondary opening trimming on the isolation EVA;

s7, the outgoing line is picked out from the cut opening of the isolation EVA, the position of the isolation EVA is adjusted again to enable the isolation EVA to completely cover the photovoltaic module, then a glass back plate is taken and covered on the isolation EVA, and then isolation paper is placed under the outgoing line and fixed through a high-temperature adhesive tape to complete the lamination work of the photovoltaic module.

2. The method for splicing the laminates produced by the photovoltaic module as claimed in claim 1, wherein the ambient temperature of the production shop is controlled to be 24 ± 1 ℃ before the step S1 is performed, and the ambient humidity of the production shop is controlled to be 20-50% before the step S1 is performed.

3. The method for splicing the laminated layers produced by the photovoltaic module as claimed in claim 1, wherein the specific operation steps for cleaning the isolating EVA and the glass back panel in the step S1 are as follows: jet flow with the temperature of 40-50 ℃ generated by ionizing air by a plasma generator is adopted to treat the front and back surfaces of the isolation EVA and the glass back plate.

4. The method for splicing laminated layers produced by photovoltaic modules, according to claim 1, wherein the step S2 is performed by welding the bus bars so that the bus bars at the head part are 6 ± 2mm from the glass edge and the bus bars at the tail part are 4 ± 2mm from the glass edge.

5. The method for splicing the stacks produced by the photovoltaic module as claimed in claim 1, wherein the specific operation steps of welding the cell sheets into the cell strings in the step S2 are as follows: the method comprises the steps of firstly welding the front side of a battery piece through an electric soldering iron, enabling an electric soldering iron welding belt to be overlapped with a main grid line of the battery piece, enabling the tail end of the electric soldering iron welding belt to keep a distance of 8 +/-2 mm from the edge of the battery piece, ensuring that the tail end of the electric soldering iron welding belt cannot be welded to the tail end of a pad on the back side of the battery piece, controlling the welding temperature to be 220 plus and 340 ℃, then welding the back side of the battery piece through the electric soldering iron, overturning the battery piece with the front side welded, welding the electric soldering iron welding belt extending out of a first battery piece to the back side of a second battery piece, welding the electric soldering iron welding belt extending out of the second battery piece to the back side of a third battery piece, sequentially splicing the front side and the tail side of.

6. The method for splicing the laminated layers produced by the photovoltaic module, according to claim 1, wherein the specific operation steps of placing the cell strings on the isolated EVA in the step S2 are as follows: and placing the battery strings according to a process drawing, sequentially arranging the battery strings from back to front according to the sequence of negative and positive, positive and negative, negative and positive and negative, and measuring and recording the distance between the adjacent battery strings by using a ruler.

7. The method for splicing the laminated layers produced by the photovoltaic module, according to claim 1, wherein the bus bars are fixed on the back isolating plate in the step S4, so as to ensure that the bus bars are free from edge warping.

8. The method for splicing the laminated layers produced by the photovoltaic module, according to claim 1, wherein the step S5 is to ensure that the rough surface of the new isolated EVA faces the cell string.

9. The method of splicing laminated layers in photovoltaic module production according to claim 1, wherein the isolated EVA is trimmed with the primary opening in the step S6 in a transverse direction and a length of 20mm, and the isolated EVA is trimmed with the secondary opening in the step S6 in a longitudinal direction and a length of 30 mm.

Technical Field

The invention belongs to the field of photovoltaic module production, and particularly relates to a lamination splicing method for photovoltaic module production.

Background

In the existing life, a photovoltaic module generally refers to a solar cell module, which is composed of a high-efficiency crystalline silicon solar cell, ultra-white cloth grain toughened glass, EVA, a transparent TPT back plate and an aluminum alloy frame and has the characteristics of long service life, strong mechanical compression resistance external force and the like, meanwhile, the structural forms of the conventional solar cell module include a glass shell structure, a bottom box type module, a flat plate type module and an all-plastic sealing module without a cover plate, and because the output voltage of a single solar cell is lower, and the electrode of the unpackaged cell is easy to fall off due to the influence of the environment, a certain number of single cells are sealed into the solar cell module in a series-parallel connection mode so as to avoid the corrosion of the cell electrode and an interconnecting wire, in addition, the packing also avoids the cell fragmentation, the outdoor installation is convenient, and the service life and the reliability of the solar cell module are determined by the quality of the packing, in the photovoltaic module production and manufacturing process, single solar cells are tightly packaged after being connected in series and parallel, so that surface electrodes, interconnection lines and the like of the cells are protected from corrosion, and in addition, the packaging also avoids fragmentation of the cells, so the photovoltaic module production process is actually the packaging process of the module, therefore, the module line is called a packaging line, the packaging is a key step in the solar cell production, a good packaging process does not exist, good cells cannot produce good module plates, and the photovoltaic module production steps and the process flow are generally as follows: the method comprises the steps of detection and sorting of battery pieces, scribing by a laser machine, front welding, inspection, back concatenation, inspection, lamination and splicing and laying, lamination, deburring, final inspection, border installation, wire box installation, high-pressure test, cleaning, sampling inspection, labeling, packaging and warehousing, wherein the lamination and laying process is an important process.

The photovoltaic module lamination splicing process takes toughened glass as a carrier, correctly connects the serially connected battery strings on the vinyl acetate copolymer by using a bus belt according to the requirements of a design drawing, splices the battery strings into a required battery matrix, and covers the vinyl acetate copolymer and a back plate material to complete the lamination process.

However, in the actual operation process of the photovoltaic module lamination splicing process in the prior art, most of the photovoltaic module lamination splicing processes are directly connected by laying the welded battery strings in other factories, and the welding step from the battery piece to the battery string is lacked, so that the end-to-end connection relationship between the positive electrode and the negative electrode of the battery piece or the battery string suitable for the current lamination splicing photovoltaic module cannot be selected, thereby seriously affecting the subsequent processing and use of the photovoltaic module.

The invention content is as follows:

the invention aims to solve the problems in the prior art by providing a lamination splicing method for producing a photovoltaic module.

In order to solve the above problems, the present invention provides a technical solution:

a lamination splicing method for photovoltaic module production comprises the following steps:

s1, firstly, checking isolation EVA, a glass back plate and a battery piece which need to be used, checking whether flaws or oil dirt exist on the surfaces of the isolation EVA and the glass back plate, if the flaws or the oil dirt exist, cleaning, checking whether a rosin joint or a crack exists on the surface of the battery piece, and if the rosin joint or the crack exists, replacing;

s2, welding a plurality of battery pieces to form a battery string, placing the welded battery string on the isolated EVA after inspection, and welding the bus bars at the head and the tail;

s3, taking one of the isolating EVA bars, picking up the two short bus bars by hand, positioning the opening part of the isolating EVA bars below the two long bus bars, positioning the rest parts below the two short bus bars, adjusting the position of the isolating EVA according to the position between the long bus bars and the short bus bars to enable the opening part to exceed the glass edge by 3 +/-2 mm, taking one of the glass back plates, picking up the two short bus bars by hand, positioning the opening part of the glass back plate below the two long bus bars, positioning the rest parts below the two short bus bars, adjusting the position of the glass back plate according to the position between the long bus bars and the short bus bars to enable the glass back plate to be 3 +/-2 mm away from the glass edge;

s4, taking a proper amount of high-temperature adhesive tape, and fixing the bus bar on the isolation backboard;

s5, an operator takes a new isolated EVA after inspection from the turnover frame through head-to-tail matching and lays the isolated EVA on glass;

s6, folding up the isolation EVA, carrying out primary opening trimming on the isolation EVA, then loosening the folded isolation EVA, and carrying out secondary opening trimming on the isolation EVA;

s7, the outgoing line is picked out from the cut opening of the isolation EVA, the position of the isolation EVA is adjusted again to enable the isolation EVA to completely cover the photovoltaic module, then a glass back plate is taken and covered on the isolation EVA, and then isolation paper is placed under the outgoing line and fixed through a high-temperature adhesive tape to complete the lamination work of the photovoltaic module.

Preferably, the ambient temperature of the manufacturing plant should be controlled to 24 ± 1 ℃ before the step S1 is performed, and the ambient humidity of the manufacturing plant should be controlled to 20-50% before the step S1 is performed.

Preferably, the specific operation steps of cleaning the isolation EVA and the glass back panel in step S1 are as follows: jet flow with the temperature of 40-50 ℃ generated by ionizing air by a plasma generator is adopted to treat the front and back surfaces of the isolation EVA and the glass back plate.

Preferably, in step S2, the bus bars should be welded so that the bus bars at the head are 6 ± 2mm from the glass edge and the bus bars at the tail are 4 ± 2mm from the glass edge.

Preferably, the specific operation steps of welding the battery plates into the battery string in the step S2 are as follows: the method comprises the steps of firstly welding the front side of a battery piece through an electric soldering iron, enabling an electric soldering iron welding belt to be overlapped with a main grid line of the battery piece, enabling the tail end of the electric soldering iron welding belt to keep a distance of 8 +/-2 mm from the edge of the battery piece, ensuring that the tail end of the electric soldering iron welding belt cannot be welded to the tail end of a pad on the back side of the battery piece, controlling the welding temperature to be 220 plus and 340 ℃, then welding the back side of the battery piece through the electric soldering iron, overturning the battery piece with the front side welded, welding the electric soldering iron welding belt extending out of a first battery piece to the back side of a second battery piece, welding the electric soldering iron welding belt extending out of the second battery piece to the back side of a third battery piece, sequentially splicing the front side and the tail side of.

Preferably, the specific operation steps of placing the battery strings on the isolation EVA in step S2 are as follows: and placing the battery strings according to a process drawing, sequentially arranging the battery strings from back to front according to the sequence of negative and positive, positive and negative, negative and positive and negative, and measuring and recording the distance between the adjacent battery strings by using a ruler.

Preferably, in step S4, the bus bar is fixed on the back isolation plate, so as to ensure that the bus bar has no edge warping.

Preferably, in step S5, it should be ensured that the rough surface of the new isolation EVA faces the cell string.

Preferably, the direction of the primary opening trimming of the isolated EVA in step S6 is transverse and the length is 20mm, and the direction of the secondary opening trimming of the isolated EVA in step S6 is longitudinal and the length is 30 mm.

The invention has the beneficial effects that: according to the invention, before the lamination and splicing process of the photovoltaic module, the front and back surfaces of the isolation EVA and the glass backboard are cleaned by using jet flow generated by ionizing air by the plasma generator, so that the surface of the isolation EVA and the glass backboard is ensured to be free from oil stains, the actual use effect is greatly improved, and meanwhile, through the arrangement of the cell welding process, the head-tail connection relation of the positive and negative electrodes of the cell or the cell string can be freely selected in advance, so that the subsequent processing and use of the photovoltaic module are facilitated.

Description of the drawings:

for ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.

Fig. 1 is a schematic view of a process for splicing the layers produced by the photovoltaic module of the present invention.

The specific implementation mode is as follows:

as shown in fig. 1, the following technical solutions are adopted in the present embodiment:

example (b):

a lamination splicing method for photovoltaic module production comprises the following steps:

s1, firstly, checking isolation EVA, a glass back plate and a battery piece which need to be used, checking whether flaws or oil dirt exist on the surfaces of the isolation EVA and the glass back plate, if the flaws or the oil dirt exist, cleaning, checking whether a rosin joint or a crack exists on the surface of the battery piece, and if the rosin joint or the crack exists, replacing;

s2, welding a plurality of battery pieces to form a battery string, placing the welded battery string on the isolated EVA after inspection, and welding the bus bars at the head and the tail;

s3, taking one of the isolating EVA bars, picking up the two short bus bars by hand, positioning the opening part of the isolating EVA bars below the two long bus bars, positioning the rest parts below the two short bus bars, adjusting the position of the isolating EVA according to the position between the long bus bars and the short bus bars to enable the opening part to exceed the glass edge by 3 +/-2 mm, taking one of the glass back plates, picking up the two short bus bars by hand, positioning the opening part of the glass back plate below the two long bus bars, positioning the rest parts below the two short bus bars, adjusting the position of the glass back plate according to the position between the long bus bars and the short bus bars to enable the glass back plate to be 3 +/-2 mm away from the glass edge;

s4, taking a proper amount of high-temperature adhesive tape, and fixing the bus bar on the isolation backboard;

s5, an operator takes a new isolated EVA after inspection from the turnover frame through head-to-tail matching and lays the isolated EVA on glass;

s6, folding up the isolation EVA, carrying out primary opening trimming on the isolation EVA, then loosening the folded isolation EVA, and carrying out secondary opening trimming on the isolation EVA;

s7, the outgoing line is picked out from the cut opening of the isolation EVA, the position of the isolation EVA is adjusted again to enable the isolation EVA to completely cover the photovoltaic module, then a glass back plate is taken and covered on the isolation EVA, and then isolation paper is placed under the outgoing line and fixed through a high-temperature adhesive tape to complete the lamination work of the photovoltaic module.

The environmental temperature of the production workshop is controlled to be 24 +/-1 ℃ before the step S1 is carried out, and the environmental humidity of the production workshop is controlled to be 20-50% before the step S1 is carried out, so that the environmental temperature and the humidity of the production workshop can be better ensured, and the influence of environmental factors on the production quality of the photovoltaic module is avoided.

The specific operation steps of cleaning and isolating the EVA and the glass back panel in the step S1 are as follows: jet flow with the temperature of 40-50 ℃ generated by ionizing air by the plasma generator is adopted to treat the front and back surfaces of the isolation EVA and the glass back plate, so that the front and back surfaces of the isolation EVA and the glass back plate are better cleaned, and oil stains on the front and back surfaces of the isolation EVA and the glass back plate are avoided.

In step S2, it should be ensured that the bus bar at the head is 6 ± 2mm away from the edge of the glass and the bus bar at the tail is 4 ± 2mm away from the edge of the glass when the bus bars are welded, so that the battery string can be better fixed by welding the bus bars.

The specific operation steps of welding the battery plates into the battery string in the step S2 are as follows: the method comprises the steps of firstly welding the front side of a battery piece through an electric soldering iron, enabling an electric soldering iron welding belt to be overlapped with a main grid line of the battery piece, enabling the tail end of the electric soldering iron welding belt to keep a distance of 8 +/-2 mm from the edge of the battery piece, ensuring that the tail end of the electric soldering iron welding belt cannot be welded to the tail end of a pad on the back side of the battery piece, controlling the welding temperature to be 220 plus or minus 340 ℃, then welding the back side of the battery piece through the electric soldering iron, overturning the battery piece with the front side welded, welding the electric soldering iron welding belt extending out of the first battery piece to the back side of the second battery piece, welding the electric soldering iron welding belt extending out of the second battery piece to the back side of the third battery piece, sequentially splicing the battery pieces end to end, welding a plurality of battery pieces into a battery string, and better welding different battery strings through.

The specific operation steps of placing the battery strings on the isolation EVA in the step S2 are as follows: and placing the battery strings according to a process drawing so that the battery strings are sequentially arranged from back to front according to the sequence of negative positive, positive negative, negative positive and negative, and simultaneously measuring the distance between the adjacent battery strings by using a ruler and recording, thereby facilitating the correct placement and connection of the positive and negative electrodes of the battery strings.

In step S4, the bus bar is fixed to the isolation backplane, so that it is ensured that no edge of the bus bar is warped, and it is better ensured that no defect occurs in the welding of the bus bar.

In step S5, it should be ensured that the new isolation EVA has a rough surface facing the battery string, so as to better hide the welded bus bar.

The direction of carrying out primary opening trimming on the isolation EVA in the step S6 is transverse, and the length is 20mm, the direction of carrying out secondary opening trimming on the isolation EVA in the step S6 is longitudinal, and the length is 30mm, so that the outgoing line and the isolation paper can be connected better.

Specifically, during actual operation, firstly, the environmental temperature of a production workshop is controlled to be 24 +/-1 ℃, and the environmental humidity of the production workshop is controlled to be 20-50%; then, the isolation EVA, the glass back plate and the battery piece which need to be used are checked, whether flaws or oil dirt exist on the surfaces of the isolation EVA and the glass back plate or not is checked, if the flaws or the oil dirt exist, cleaning is needed, jet flow with the temperature of 40-50 ℃ generated by ionizing air by a plasma generator is adopted to process the front and back surfaces of the isolation EVA and the glass back plate, whether a rosin joint or a crack exists on the surface of the battery piece or not is checked, and if the rosin joint or the crack exists, replacement is needed; then welding a plurality of battery pieces to form a battery string, firstly welding the front side of the battery pieces through an electric soldering iron, enabling a welding belt of the electric soldering iron to be overlapped with a main grid line of the battery pieces, simultaneously enabling the tail end of the welding belt of the electric soldering iron to keep a distance of 8 +/-2 mm with the edge of the battery pieces, ensuring that the tail end of the welding belt of the electric soldering iron cannot be welded to the tail end of a pad on the back side of the battery pieces, simultaneously controlling the welding temperature to be 220-340 ℃, then welding the back side of the battery pieces through the electric soldering iron, overturning the battery pieces with the front side welded, welding the welding belt of the electric soldering iron extending out of the first battery piece to the back side of the second battery piece, welding the welding belt of the electric soldering iron extending out of the second battery piece to the back side of the third battery piece, sequentially splicing the battery pieces end to end, welding the plurality of battery pieces to form the battery string, meanwhile, the bus bars at the head part and the tail part are welded, and meanwhile, the bus bars at the head part are ensured to be 6 +/-2 mm away from the edge of the glass, and the bus bars at the tail part are ensured to be 4 +/-2 mm away from the edge of the glass when the bus bars are welded; then taking one of the isolating EVA, picking up the two short bus bars by hand, positioning the opening part of the isolating EVA below the two long bus bars, positioning the rest part below the two short bus bars, adjusting the position of the isolating EVA according to the position between the long bus bars and the short bus bars to enable the opening part to exceed the glass edge by 3 +/-2 mm, then taking one of the glass back plates, picking up the two short bus bars by hand, positioning the opening part of the glass back plate below the two long bus bars, positioning the rest part below the two short bus bars, and adjusting the position of the glass back plate according to the position between the long bus bars and the short bus bars to enable the opening part to be 3 +/-2 mm away from the glass edge; then, taking a proper amount of high-temperature adhesive tape, fixing the bus bar on the isolation back plate, and simultaneously ensuring that the bus bar has no raised edge; then, an operator takes a new isolation EVA after inspection from the turnover frame in a head-to-tail matching manner, and the isolation EVA is flatly laid on glass, and meanwhile, the rough surface of the new isolation EVA faces the battery string; then folding up the isolation EVA, carrying out primary opening trimming on the isolation EVA, wherein the direction is transverse and the length is 20mm, then loosening the folded isolation EVA, and carrying out secondary opening trimming on the isolation EVA, wherein the direction is longitudinal and the length is 30 mm; and finally, picking out the outgoing line from the opening of the isolation EVA trimming, adjusting the position of the isolation EVA again to enable the isolation EVA to completely cover the photovoltaic module, then taking a glass back plate and covering the glass back plate on the isolation EVA, and then placing isolation paper under the outgoing line to fix the isolation paper through a high-temperature adhesive tape to complete the lamination work of the photovoltaic module.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.