CN111081813B - Solar cell module production method and solar cell module - Google Patents

Abstract

The invention provides a solar cell module production method and a solar cell module, and relates to the technical field of solar photovoltaics. The method comprises the following steps: manufacturing a battery plate precursor with a welding groove on at least one part of the edge; the solder strip groove is connected with the first surface and the second surface of the battery plate precursor; the first surface is a light receiving surface or a backlight surface of the battery plate precursor; the second surface is perpendicular to the first surface; arranging a main grid line on the first surface of the battery piece precursor to obtain a battery piece; the end part of the main grid line is aligned with the solder strip groove on the battery piece precursor; laying welding strips on the main grid lines and the welding strip grooves of the plurality of battery pieces, and performing series welding on the battery pieces based on the welding strips to obtain a battery string; and packaging the solar cell module based on the cell string to obtain the solar cell module. The hidden crack is reduced to a great extent, the size of a gap required to be reserved between the battery pieces is reduced, and the power generation efficiency is improved.

Description

Solar cell module production method and solar cell module

technical field

The present invention relates to the technical field of solar photovoltaic, in particular to a method for producing a solar cell assembly and a solar cell assembly.

Background technique

In the solar photovoltaic industry, solar cell modules formed by encapsulating cells can increase the power of photovoltaic modules per unit area, thereby reducing the cost of solar cells, so they are widely used.

At present, in the process of encapsulating the cells into a solar cell module, it is necessary to use a welding tape to connect the positive busbar of the previous cell and the negative busbar of the latter cell, so as to realize the collection and transmission of current.

The above-mentioned prior art solutions have the following disadvantages: due to the height difference between the positive main grid of the previous battery sheet and the negative main grid of the latter battery sheet, the welding ribbon needs to be bent into a "Z" shape, which is easy to cause cracks, and the battery A large gap needs to be left between the sheets, which reduces the power generation efficiency.

SUMMARY OF THE INVENTION

The present invention provides a solar cell module production method, a solar cell module, a solar cell module production device, and a computer-readable storage medium, aiming at solving the problem of the existence of heights in the positive busbar of the former cell and the negative busbar of the latter cell. Poor, the bending of the ribbon is easy to cause cracks, and a large gap needs to be left between the cells.

In a first aspect, an embodiment of the present invention provides a method for producing a solar cell module, the method comprising:

Making a battery sheet precursor with at least a part of the edge of the battery sheet groove; the welding ribbon groove connects the first surface and the second surface of the battery sheet precursor; the first surface is the light-receiving surface of the battery sheet precursor or a backlight surface; the second surface is perpendicular to the first surface;

Disposing a busbar on the first surface of the cell precursor to obtain a cell; the end of the busbar is aligned with the ribbon groove on the cell precursor;

laying welding strips on the busbars and the welding strip grooves of a plurality of the battery sheets, and stringing the battery sheets based on the welding strips to obtain a battery string;

A solar cell module is obtained based on the cell string packaging.

Optionally, the depth of the ribbon groove is equal to the thickness of the ribbon.

Optionally, the ribbon groove includes: an inclined surface; the inclined surface connects the first surface and the second surface of the battery sheet precursor; the angle between the inclined surface and the first surface is 30- 60°.

Optionally, the width of the ribbon groove is equal to the width of the ribbon.

Optionally, the manufacturing of the battery sheet precursor having at least a part of the edge of the battery sheet with grooves includes:

Scribing the edge of the flat-edged silicon wafer to obtain at least part of the edge of the silicon wafer with the ribbon groove;

Using the silicon wafer with the ribbon groove as the silicon substrate to manufacture the cell sheet precursor.

Optionally, the manufacturing of the battery sheet precursor having at least a part of the edge of the battery sheet with grooves includes:

Using a silicon wafer with a flat edge as a silicon substrate to make a cell precursor with a flat edge;

The edge of the battery sheet precursor with flat edges is subjected to scribing treatment to obtain the battery sheet precursor with the ribbon groove at least part of the edge.

Optionally, the grooving treatment includes: grinding treatment or laser ablation.

Optionally, before the battery strings are obtained by laying welding ribbons on the busbars and the welding ribbon grooves of a plurality of the battery sheets, and stringing the battery sheets based on the welding ribbons, further comprising: :

Flatten and bend the preset area of the ribbon;

The laying of soldering ribbons on the busbars and the soldering ribbon grooves of the plurality of battery sheets includes:

Soldering ribbons are laid on the busbars and the ribbon grooves of a plurality of the battery sheets, and the predetermined area is laid in the ribbon grooves.

Optionally, the thickness of the flattened solder ribbon in the preset area is 100 to 200 microns.

In a second aspect, an embodiment of the present invention provides a solar cell module, which is produced by the method for producing a solar cell module described in any one of the above.

In a third aspect, an embodiment of the present invention provides a solar cell module production device, the solar cell module production device includes: an interface, a bus, a memory and a processor, and the interface, the memory and the processor are connected through the bus , the memory is used to store an executable program, and the processor is configured to run the executable program to implement the steps of any one of the foregoing solar cell module production methods.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein an executable program is stored on the computer-readable storage medium, and the executable program is executed by a processor to implement the foregoing The steps of any one of the solar cell module production methods.

In an embodiment of the present invention, a battery sheet precursor having at least a part of the edge with a ribbon groove is produced; the ribbon groove connects the first surface and the second surface of the battery sheet precursor; the first surface is the the light-receiving surface or the backlight surface of the cell precursor; the second surface is perpendicular to the first surface; a main grid line is arranged on the first surface of the cell precursor to obtain a cell; the main The ends of the grid lines are aligned with the welding strip grooves on the battery sheet precursors; welding strips are laid on the busbar lines and the welding strip grooves of several of the battery sheets, and based on the welding strips The battery sheets are welded with strings to obtain a battery string; and a solar cell assembly is obtained based on the packaging of the battery string. In the prior art, the main reason is that the edges of each cell are flat, so that there is a vertical height difference between the positive main grid of the previous cell and the negative main grid of the next cell, and the welding ribbon needs to be bent into a "Z" shape. The shape is easy to cause cracks, and a large gap needs to be left between the cells, which reduces the power generation efficiency. In the present application, the edge of the cell precursor has a ribbon groove, and the ribbon groove connects the first surface and the second surface of the cell precursor, and the first surface is the light-receiving surface or the backlight surface of the cell precursor. The second surface is perpendicular to the first surface, and then the welding strip groove is used to convert the vertical height difference into a smooth transition height difference. The size of the gap that needs to be left between the cells is reduced, and the power generation efficiency is improved.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the drawings that are used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. , for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

FIG. 1 shows a flow chart of steps of a method for producing a solar cell module in an embodiment of the present invention;

FIG. 2 may be a schematic structural diagram of a cell precursor in an embodiment of the present invention;

FIG. 3 shows a flow chart of the steps of manufacturing a cell precursor with a ribbon groove on the edge according to an embodiment of the present invention;

FIG. 4 shows a flow chart of another step of manufacturing a cell precursor with a ribbon groove on the edge according to an embodiment of the present invention;

FIG. 5 may be a schematic structural diagram of a battery sheet in an embodiment of the present invention;

FIG. 6 may be a schematic structural diagram of laying a welding tape on a battery sheet according to an embodiment of the present invention;

FIG. 7 may be a schematic structural diagram of a battery string in the prior art in an embodiment of the present invention;

FIG. 8 shows a flow chart of steps of a method for producing a solar cell module in Embodiment 2 of the present invention;

FIG. 9 may be a schematic structural diagram of a welding ribbon after bending and flattening in an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a solar cell module production apparatus provided by an embodiment of the present invention.

Description of reference numbers:

11- Cell Precursor, 12- Ribbon Groove, 111- First Surface of Cell Precursor, 112- Second Surface of Cell Precursor, 121- Inclined Surface, 13- Busbar, 14- Ribbon , 141-the part of the welding strip that needs to be bent, 142-the preset area after the welding strip is flattened and bent, 15-battery sheet, 1421-the end of the preset area, 181-interface, 182-processor, 183 - Memory, 184-bus.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

Referring to FIG. 1, FIG. 1 shows a flow chart of steps of a method for producing a solar cell module in an embodiment of the present invention. Referring to FIG. 1, the method may include the following steps:

Step 101 : fabricate a cell precursor with at least part of the edge of the cell precursor; the solder tape slot connects the first surface and the second surface of the cell precursor; the first surface is the cell precursor the light-receiving surface or the backlight surface; the second surface is perpendicular to the first surface.

In the embodiment of the present invention, all edges of the battery sheet precursor are provided with ribbon grooves, or part of the edges of the battery sheet precursor are provided with ribbon grooves, which are not specifically limited in this embodiment of the present invention.

In the embodiment of the present invention, the cell precursor may be a cell without busbars. In this embodiment of the present invention, this is not specifically limited.

In an embodiment of the present invention, referring to FIG. 2 , FIG. 2 may be a schematic structural diagram of a cell precursor in an embodiment of the present invention. In FIG. 2 , a part of the edge of the battery sheet precursor 11 has a ribbon groove 12 . The ribbon groove 12 connects the first surface 111 and the second surface 112 of the cell precursor. The first surface is the light-receiving surface or the backlight surface of the cell precursor. The second surface is perpendicular to the first surface. The light-receiving surface of the cell sheet precursor may be the light-receiving surface of the cell sheet precursor. The second surface may be the side of the cell precursor.

In the embodiment of the present invention, the ribbon groove on the edge is subsequently used for laying the ribbon, the edge of the battery sheet precursor has a ribbon groove, and the ribbon groove connects the first surface and the second surface of the battery sheet precursor, the first The surface is the light-receiving surface or the backlight surface of the cell precursor, the second surface is perpendicular to the first surface, and the ribbon groove is used to convert the vertical height difference into a smooth transition height difference, and the degree of bending of the ribbon is significantly reduced. To a large extent, the cracks are reduced, the size of the gap that needs to be left between the cells is reduced to a large extent, and the power generation efficiency is improved.

In the embodiment of the present invention, the specific shape of the ribbon groove is not specifically limited. For example, the inner surface of the ribbon groove may be curved or flat, or the like. The depth of the ribbon groove may be the same as the thickness of the ribbon, or the depth of the ribbon groove may be greater than or equal to the thickness of the ribbon. In this embodiment of the present invention, this is not specifically limited.

In the embodiment of the present invention, a scribing process may be performed in any step between obtaining a silicon wafer from a square silicon rod and fabricating a cell wafer precursor. In this embodiment of the present invention, this is not specifically limited.

In the embodiment of the present invention, optionally, the ribbon groove includes: an inclined surface; the inclined surface connects the first surface and the second surface of the cell precursor; the inclined surface is connected to the The included angle of the first surface is 30-60°.

Specifically, as shown in FIG. 2 , the ribbon groove 12 includes an inclined surface 121 , and the inclined surface 121 is connected to the first surface 111 and the second surface 112 of the cell precursor. The angle between the inclined surface 121 and the first surface 111 of the cell precursor is θ, and the value range of θ can be 30-60°. For example, θ may be 30°, or θ may be 45°, or θ may be 60°.

In the embodiment of the present invention, when the angle between the inclined surface of the ribbon groove and the first surface of the cell precursor is 30-60°, the degree of bending of the subsequent ribbon is significantly reduced, to a large extent The cracks are reduced, the size of the gap that needs to be left between the cells is greatly reduced, and the power generation efficiency is improved.

Referring to Table 1 below, Table 1 shows the corresponding relationship between the angle between the ribbon groove and the first surface of the battery sheet precursor and the size of the gap that needs to be left between the battery sheets.

Table 1

Angle (°) Clearance(um) 30 300.00 35 261.52 40 233.36 45 212.13 50 195.81 55 183.12 60 173.21

Compared with the prior art, when the edge of the cell is flat, the positive busbar of the previous cell and the negative busbar of the next cell are connected by a welding ribbon, because the surface of the positive busbar of the previous cell is There is a vertical height difference with the surface where the negative main grid of the latter cell is located, so that the gap between the cells is 2-3 mm. In the present application, the ribbon groove includes an inclined surface, and the inclined surface connects the first surface and the second surface of the cell precursor. The angle between the inclined surface and the first surface of the cell precursor is θ, and the value range of θ is 30-60°, which reduces the gap between the subsequent cells by 10 times or more, thereby making the subsequent solar cells In the module, the total gap between the cells is also reduced by 10 times or more, which greatly improves the power generation efficiency of the solar cell module.

In the embodiment of the present invention, optionally, the width of the above-mentioned welding strip groove is greater than or equal to the width of the welding strip, so that the subsequent welding strip can be completely accommodated in the above-mentioned welding strip groove, which reduces the bending degree of the welding strip and reduces hidden dangers. crack.

In the embodiment of the present invention, optionally, referring to FIG. 3 , FIG. 3 shows a flow chart of steps of manufacturing a battery sheet precursor with a ribbon groove on the edge in an embodiment of the present invention. Referring to FIG. 3, the above step 101 may include the following steps:

Step 1011 , performing a grooving process on the edge of the silicon wafer with the flat edge to obtain a silicon wafer with the ribbon groove at least part of the edge.

Step 1012 , using the silicon wafer with the ribbon groove as a silicon substrate to fabricate a cell precursor.

Specifically, the edge of the silicon wafer with the flat edge can be grooved first, so as to obtain the silicon wafer with the welding strip groove at least part of the edge. Then, using the silicon wafer with the above-mentioned ribbon groove as a silicon substrate, a cell precursor is fabricated through processes such as texturing, diffusion, plasma etching, chemical vapor deposition anti-reflection film, and laser drilling. That is, firstly, a ribbon groove is set on the edge of the silicon wafer, and then the silicon wafer with the ribbon groove is used as a silicon substrate to make a cell precursor.

In the embodiment of the present invention, optionally, referring to FIG. 4 , FIG. 4 shows a flowchart of another step of manufacturing a cell precursor with a ribbon groove on the edge in an embodiment of the present invention. Referring to FIG. 4 , the above step 101 may include the following steps:

Step 1013 , using a silicon wafer with a flat edge as a silicon substrate to fabricate a cell chip precursor with a flat edge.

Step 1014 , scribing the edge of the flat-edged cell precursor to obtain a cell precursor having the ribbon groove at least part of the edge.

Specifically, a silicon wafer with a flat edge can be used as a silicon substrate, and a cell precursor with a flat edge can be fabricated through processes such as texturing, diffusion, plasma etching, chemical vapor deposition anti-reflection film, and laser drilling. Then, the cell sheet precursor with flat edges is subjected to scribing treatment to obtain a cell sheet precursor with at least a part of the edge of the cell sheet precursor having a ribbon groove. That is, the cell precursors are first made of silicon wafers with flat edges, and then the cell precursors with flat edges are subjected to scribing treatment.

In the embodiment of the present invention, optionally, the above-mentioned grooving treatment may include: grinding treatment or laser ablation, and the above-mentioned grooving treatment method can accurately control the size of the ribbon groove, such as accurately controlling the clamping between the inclined surface and the first surface. The angle is not specifically limited in this embodiment of the present invention.

Step 102: Disposing a busbar on the first surface of the cell precursor to obtain a cell; the end of the busbar is aligned with the ribbon groove on the cell precursor.

In the embodiment of the present invention, a busbar may be provided on the first surface of the cell precursor to obtain a cell. The cell can be a heterojunction cell, PERC (Passivated Emitter and Rear Cell, back passivation cell), N-type cell, P-type cell, double-sided cell, Topcon cell (tunnel oxide passivation) contact with the battery), etc. In this embodiment of the present invention, this is not specifically limited.

In the embodiments of the present invention, the busbars may include positive busbars and/or negative busbars. The ends of the busbars are aligned with the ribbon grooves on the cell precursor.

Referring to FIG. 5 , FIG. 5 may be a schematic structural diagram of a battery sheet in an embodiment of the present invention. In FIG. 5 , the ends 131 of the bus bars 13 are aligned with the ribbon grooves 12 on the cell precursor 11 .

Step 103 : Lay welding ribbons on the busbars and the welding ribbon grooves of a plurality of the battery sheets, and string the battery sheets based on the welding ribbons to obtain a battery string.

Specifically, soldering ribbons are laid on the busbars and soldering ribbon grooves of several battery sheets, and the battery sheets are welded together based on the soldering ribbons to obtain a battery string. That is, the welding tape is laid on the busbar, and at the same time, the welding tape is laid in the welding tape groove, and the welding tape welds a plurality of battery slices to obtain a battery string. The part of the ribbon that needs to be bent is accommodated in the ribbon groove, so that the degree of bending of the ribbon can be reduced to a large extent, cracks can be reduced, and the gap between the battery sheets can be reduced to a large extent.

Referring to FIG. 6 , FIG. 6 may be a schematic structural diagram of laying a welding tape on a battery sheet according to an embodiment of the present invention. In FIG. 6 , the portion 141 of the ribbon 14 that needs to be bent is accommodated in the ribbon groove 12 .

Referring to FIG. 6 , the height and width of the inner portion 12 of the ribbon groove may be the same as the height and width of the ribbon 141 in the bent portion, and the portion 141 of the ribbon 14 that needs to be bent is accommodated in the ribbon groove 12 . , and the part 141 of the welding tape 14 that needs to be bent is accommodated just after the welding tape groove 12, and the height of the welding tape 12 is the same as that of the battery sheet, which further reduces the further bending and flattening of the welding tape. pressure.

In the prior art, the welding ribbon is completely protruded from the battery sheet, which requires a large degree of bending of the welding ribbon, which is likely to cause cracks, and requires a large gap between the battery sheets. The ribbons that need to be bent between the cells are accommodated in the ribbon grooves, which can greatly reduce the bending degree of the ribbons, reduce cracks, and reduce the gap between the cells to a great extent. .

For example, referring to FIG. 7 , FIG. 7 may be a schematic structural diagram of a battery string in the prior art in an embodiment of the present invention. In FIG. 7 , the portion 141 of the welding tape 14 that needs to be bent is completely protruded from the battery sheet 15 . Referring to FIG. 6 , the welding ribbon 141 that needs to be bent between the battery sheets is accommodated in the welding ribbon groove 12 .

In the embodiment of the present invention, optionally, the depth of the welding ribbon groove is equal to the thickness of the welding ribbon, and further, after the bent welding ribbon is accommodated in the welding ribbon groove, from the height direction, the height of the welding ribbon and the battery sheet are the same , which further reduces the pressure on the cell during the further bending and flattening of the ribbon. In this embodiment of the present invention, this is not specifically limited. In the embodiment of the present invention, optionally, the accommodating space of the welding strip groove may be the same as the outer dimension of the welding strip, and further, after the bent welding strip is accommodated in the welding strip groove, from the direction of height, width, etc., the welding The height of the ribbon and the cell is the same, which further reduces the pressure on the cell during the further bending and flattening of the ribbon. In this embodiment of the present invention, this is not specifically limited.

For example, as shown in FIG. 6 , the height and width of the inside of the ribbon groove 12 may be the same as the height and width of the ribbon 141 in the bent portion, so that the portion 141 of the ribbon 14 that needs to be bent is accommodated in the ribbon 14. In the groove 12, and the part 141 of the welding strip 14 that needs to be bent is accommodated just after the welding strip groove 12, the height of the welding strip 12 is the same as that of the battery sheet, which further reduces the further bending and flattening of the welding strip. pressure on the sheet.

Step 104 : obtaining a solar cell module based on the cell string packaging.

In the embodiment of the present invention, the solar cell module can be obtained by performing layout, lamination packaging, etc. on the solar cell sheet. In this embodiment of the present invention, this is not specifically limited.

In the embodiment of the present invention, the edge of the cell precursor has a ribbon groove, and the ribbon groove connects the first surface and the second surface of the cell precursor, and the first surface is the light-receiving surface or the backlight surface of the cell precursor , the second surface is perpendicular to the first surface, and then the welding strip groove is used to convert the vertical height difference into a smooth transition height difference. The size of the gap that needs to be left between the cells is greatly reduced, and the power generation efficiency is improved.

Embodiment 2

Referring to FIG. 8, FIG. 8 shows a flow chart of steps of a method for producing a solar cell module in Embodiment 2 of the present invention. Referring to FIG. 8, the method may include the following steps:

Step 201 : fabricating a cell precursor with at least a part of the edge with a ribbon groove; the ribbon groove connects the first surface and the second surface of the cell precursor; the first surface is the cell precursor the light-receiving surface or the backlight surface; the second surface is perpendicular to the first surface.

Step 202: Disposing a busbar on the first surface of the cell precursor to obtain a cell; the end of the busbar is aligned with the ribbon groove on the cell precursor.

In this embodiment of the present invention, for the foregoing steps 201 and 202, reference may be made to the relevant descriptions of the foregoing steps 101 and 102, which are not repeated here in order to avoid repetition.

Step 203: Flatten and bend the predetermined area of the welding tape.

In the embodiment of the present invention, the predetermined area of the welding strip can be flattened and bent. The thickness of the unflattened, bent ribbon can be: 210-270 microns. Optionally, after the flattening process, the thickness of the welding ribbon in the preset area may be 100-200 microns. The angle between the bent welding strip and the unbent welding strip can also be 30-60°. Specifically, the bent welding strip can cooperate with the welding strip groove, for example, the bent welding strip The included angle with the unbent welding ribbon can be equal to the included angle between the inclined surface of the welding ribbon groove and the first surface of the cell precursor, so as to realize the good matching between the welding ribbon and the welding ribbon groove.

In the embodiment of the present invention, the predetermined area of the welding ribbon is crushed and bent in advance, and then after the welding ribbon is subsequently set on the battery sheet, the crushing and bending range is small. Furthermore, the pressure on the battery sheets and the like is also smaller, cracks can be reduced to a great extent, and the gap between the battery sheets can also be reduced. In the embodiment of the present invention, within the range of 100-200 micrometers, the greater the degree of flattening the welding ribbon, the less the degree of cracking, and the smaller the gap between the battery sheets. For example, referring to Table 2 below, Table 2 shows that when the angle between the inclined surface of the ribbon groove and the first surface of the cell precursor is 45°, the flattened ribbons with different thicknesses will The correspondence between the gaps between the slices.

Table 2

Referring to Table 2, in the range of 100-200 microns, the greater the degree of flattening of the welding tape, the smaller the flattening amplitude and the less the degree of cracking after the welding tape is subsequently placed on the cell, and the further the cell is flattened. The gap between can also be smaller.

In the embodiment of the present invention, optionally, the end of the flattened and bent region may further include: a rounded chamfer. For example, referring to FIG. 9 , FIG. 9 may be a schematic structural diagram of a bent and flattened welding tape in an embodiment of the present invention.

As shown in the upper figure in FIG. 9 , the portion 142 of the welding ribbon 14 that is framed by a circular dotted line may be a pre-flattened and bent predetermined area. The end portion 1421 of the flattened and bent predetermined region 142 includes a rounded chamfer. The radius of the rounded chamfer is R. The value range of R can be 3-5 microns. For example, referring to the lower figure in FIG. 9 , the lower figure in FIG. 9 may be an enlarged schematic diagram of a bent and flattened welding tape in an embodiment of the present invention. The initial thickness of the soldering ribbon of the unflattened part is H1, H1 may be 210-270 microns, H2 may be the thickness of the flattened soldering ribbon, H2 may be 100-200 microns, and R may be 3-5 microns.

Step 204 : Lay ribbons on the busbars and the ribbon grooves of a plurality of the battery sheets, the preset area is laid in the ribbon grooves, and based on the welding position of the ribbons. The battery slices are described to obtain battery strings.

In the embodiment of the present invention, the welding strips may be laid on the busbars and the welding strip grooves of several battery slices, and the predetermined area after the flattening and bending process is laid in the above welding strip grooves, and then the subsequent The deformation amount corresponding to the bending or flattening of the welding ribbon can be accommodated in the above-mentioned welding ribbon groove to a large extent. .

In the embodiment of the present invention, the depth of the ribbon groove may be the same as the thickness of the bent and flattened ribbon, or the depth of the ribbon groove may be greater than or equal to the thickness of the bent and flattened ribbon. In this embodiment of the present invention, this is not specifically limited.

Step 205 : obtaining a solar cell module based on the cell string packaging.

In this embodiment of the present invention, the above-mentioned step 205 may refer to the relevant description of the above-mentioned step 104, which is not repeated here to avoid repetition.

In the embodiment of the present invention, the edge of the cell precursor has a ribbon groove, and the ribbon groove connects the first surface and the second surface of the cell precursor, and the first surface is the light-receiving surface or the backlight surface of the cell precursor , the second surface is perpendicular to the first surface, and then the welding strip groove is used to convert the vertical height difference into a smooth transition height difference. The size of the gap that needs to be left between the cells is greatly reduced, and the power generation efficiency is improved.

An embodiment of the present invention provides a solar cell module, which is produced by the aforementioned method for producing a cell module. In addition, the battery assembly can achieve the beneficial effects corresponding to the first embodiment and the second embodiment, which are not repeated here in order to avoid repetition.

FIG. 10 is a schematic structural diagram of a solar cell module production device provided by an embodiment of the present invention. As shown in FIG. 10 , the solar cell module production device provided by the embodiment of the present invention may include:

The interface 181, the processor 182, the memory 183 and the bus 184; wherein the bus 184 is used to realize the connection and communication between the interface 181, the processor 182 and the memory 183; the memory 183 stores the An executable program, the processor 182 is used to execute the executable program stored in the memory 183, so as to realize each step of the method for producing a solar cell module in the first or second embodiment above, and can achieve the same technology The effect is not repeated here in order to avoid repetition.

The present invention also provides a computer-readable storage medium, where one or more executable programs are stored in the computer-readable storage medium, and the one or more executable programs can be executed by one or more processors to achieve The steps of the method for producing a solar cell module in the above-mentioned Embodiment 1 or Embodiment 2 can achieve the same technical effect, and are not repeated here in order to avoid repetition.

It should be noted that, for the sake of simple description, the method embodiments are expressed as a series of action combinations, but those skilled in the art should know that the embodiments of the present application are not limited by the described action sequence, because According to the embodiments of the present application, certain steps may be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily all necessary for the embodiments of the present application.

It should be noted that, each embodiment focuses on describing the differences from other embodiments, and the same or related parts among the various embodiments can be referred to each other.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

From the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general hardware platform, and of course hardware can also be used, but in many cases the former is better implementation. Based on this understanding, the technical solutions of the present invention can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products are stored in a storage medium (such as ROM/RAM, magnetic disk, CD), including several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present invention.

The embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of the present invention, without departing from the scope of protection of the present invention and the claims, many forms can be made, which all belong to the protection of the present invention.

Claims (7)

1. A method for producing a solar cell module, wherein the method comprises: Making a battery sheet precursor with at least part of the edge of the battery sheet groove; the welding ribbon groove connects the first surface and the second surface of the battery sheet precursor; the first surface is the light-receiving surface of the battery sheet precursor or a backlight surface; the second surface is perpendicular to the first surface; Disposing a busbar on the first surface of the cell precursor to obtain a cell; the end of the busbar is aligned with the ribbon groove on the cell precursor; laying welding strips on the busbars and the welding strip grooves of a plurality of the battery sheets, and stringing the battery sheets based on the welding strips to obtain a battery string; A solar cell module is obtained based on the cell string packaging; Wherein, the ribbon groove includes: an inclined surface; the inclined surface connects the first surface and the second surface of the cell precursor; The manufacturing of the battery sheet precursor with at least a part of the edge of the cell chip having the welding strip groove includes: performing a scribing process on the edge of the silicon wafer with the flat edge, so as to obtain the silicon wafer with the welding strip groove at least part of the edge; Using the silicon wafer with the ribbon groove as a silicon substrate to make a cell precursor; Or, use a silicon wafer with a flat edge as a silicon substrate to make a cell precursor with a flat edge; Scribing the edge of the flat-edged cell precursor to obtain the cell precursor having the ribbon groove at least part of the edge; The angle between the inclined surface and the first surface is 30-60°. 2. The method of claim 1, wherein the depth of the ribbon groove is equal to the thickness of the ribbon. 3. The method of claim 1, wherein the width of the ribbon slot is equal to the width of the ribbon. 4 . The method according to claim 3 , wherein the grooving treatment comprises: grinding treatment or laser ablation. 5 . 5 . The method according to claim 1 , characterized in that, laying welding ribbons on the busbars and the welding ribbon grooves of a plurality of the battery sheets, and based on the welding position of the welding ribbons. 6 . Before obtaining the battery string according to the battery slice, it also includes: Flatten and bend the preset area of the ribbon; The laying of the welding tape on the busbars and the welding tape grooves of the plurality of battery sheets includes: Soldering ribbons are laid on the busbars and the ribbon grooves of a plurality of the battery sheets, and the predetermined area is laid in the ribbon grooves. 6 . The method according to claim 5 , wherein the thickness of the flattened solder ribbon in the predetermined area is 100 to 200 μm. 7 . 7 . A solar cell module, characterized in that, the solar cell module is produced by the production method according to any one of claims 1 to 6 .

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