CN112993081A - Production method and production equipment for solar cell strings - Google Patents
Production method and production equipment for solar cell strings Download PDFInfo
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- CN112993081A CN112993081A CN201911300886.0A CN201911300886A CN112993081A CN 112993081 A CN112993081 A CN 112993081A CN 201911300886 A CN201911300886 A CN 201911300886A CN 112993081 A CN112993081 A CN 112993081A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1876—Particular processes or apparatus for batch treatment of the devices
- H01L31/188—Apparatus specially adapted for automatic interconnection of solar cells in a module
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Abstract
The invention provides a solar cell string production method, which comprises the following steps: s1, synchronously laying n small battery slices formed by cutting the whole battery slice on the base station to separate two adjacent small battery slices by corresponding intervals; s2, taking a whole battery piece as a unit, placing n upper dies above n groups of prepared welding strips, synchronously placing n groups of prepared welding strips above n small pieces, and synchronously placing n small pieces on n lower dies; s3, adjusting the distance between the adjacent small sub-pieces to form a small battery string; s4, conveying the small battery string, the upper die and the lower die to a welding station; the invention provides two cloth pieces and welding ideas after the whole piece is divided into small pieces, wherein the two ideas are respectively n small piece synchronous cloth pieces and synchronous welding divided by taking the whole piece of battery piece as a unit, and sequential cloth pieces and synchronous welding by taking one small piece as a unit.
Description
Technical Field
The invention relates to the technical field of solar cell piece set string production, in particular to solar cell string production and production equipment.
Background
The rapid development of the assembly industry has led to the continuous updating of solar cells, and therefore, the equipment for interconnecting and welding the solar cells by solder strips has been continuously updated.
At present, the market finds that the power generation efficiency of a component which is formed by dividing a whole solar cell into a plurality of small pieces and then welding the small pieces by the welding belts in an interconnecting way is improved by 10% -15% compared with that of the whole solar cell, so that all large component manufacturers urgently need automation equipment which can interconnect and weld the small pieces into required battery strings by the welding belts after dividing the whole solar cell into the small pieces.
Disclosure of Invention
It is necessary to provide a method for producing a solar cell string.
There is a need for a solar cell string production apparatus.
A solar cell string production method comprises the following steps:
s1, synchronously laying n small battery slices formed by cutting the whole battery slice on the base station to separate two adjacent small battery slices by corresponding intervals;
s2, taking a whole battery piece as a unit, placing n upper dies above n groups of prepared welding strips, synchronously placing n groups of prepared welding strips above n small pieces, and synchronously placing n small pieces on n lower dies, wherein the three operations are not in sequence;
s3, adjusting the distance between the adjacent small fragments to enable the small fragments behind to be placed above the welding strips on the small fragments in front, and forming small battery strings with the small fragments and the welding strips mutually connected in corresponding gaps;
and S4, conveying the small battery string, the upper die and the lower die to a welding station, and driving the lower die, the small battery string and the upper die to convey forwards by an external mechanism after welding.
Preferably, the steps S2 and S3 are:
s2, placing n upper dies above the prepared n groups of welding strips, and synchronously placing the prepared n groups of welding strips and the n upper dies above the n small slices;
s3, synchronously placing n small fragments and n groups of welding strips and n upper dies on the small fragments on n lower dies, and adjusting the distance between the adjacent small fragments and the welding strips, the upper dies or the lower dies on the small fragments so that the small fragments behind are placed above the welding strips on the small fragments ahead to form small battery strings with the small fragments and the welding strips interconnected with each other at corresponding gaps.
Preferably, the steps S2 and S3 are:
s2, placing n upper dies above the prepared n groups of welding strips, placing the n groups of welding strips and the n upper dies on the n lower dies, and synchronously placing the n groups of welding strips on which the n upper dies and the n lower dies are placed above the n small split sheets;
and S3, adjusting the distance between the adjacent small slices and the welding strips on the small slices, the upper die and the lower die so that the small slices behind are placed above the welding strips on the small slices ahead to form small battery strings with the small slices and the welding strips interconnected with corresponding gaps.
Preferably, the steps S2 and S3 are:
s2, synchronously placing n groups of prepared welding strips above the n small split sheets, and placing n upper dies above the n groups of prepared welding strips;
s3, synchronously placing n small fragments and n groups of welding strips and n upper dies on the small fragments on n lower dies, and adjusting the distance between the adjacent small fragments and the welding strips, the upper dies or the lower dies on the small fragments so that the small fragments behind are placed above the welding strips on the small fragments in front to form small battery strings with the small fragments and the welding strips interconnected with each other at corresponding gaps; in this step, the two operations are not in sequence.
Preferably, when the distance between the adjacent small sub-sheets is adjusted in the above step, based on one of the n small sub-sheets and the welding strip, the upper die or the lower die thereon, the other small battery sub-sheets and the welding strip and the upper die or the lower die thereon are synchronously conveyed towards the reference small battery sub-sheet and the welding strip, the upper die or the lower die thereon and each adjacent small battery sub-sheet thereon and the welding strip, the upper die or the lower die thereon are synchronously close to each other, so that the gap between two adjacent small sub-sheets forming the same string is s, the gap between two adjacent small sub-sheets forming different strings is s', and the rear small sub-sheet is placed on the welding strip on the front small sub-sheet to form a group of small battery string units.
Preferably, a solar cell string production method includes the following steps:
s1, paving one small piece of the n small battery pieces formed by cutting the whole battery piece on the base;
s2, placing a group of prepared welding strips above a small slice, and placing an upper die above the group of welding strips;
s3, sequentially placing n-1 small sub-slices, n-1 group welding strips and n-1 upper dies, and correspondingly placing the n-1 small sub-slices, the n-1 group welding strips on the n-1 small sub-slices and the n-1 upper dies on the n-1 lower dies to form small battery strings with the small sub-slices and the welding strips interconnected in corresponding gaps;
and S4, conveying the small battery string, the upper die and the lower die to a welding station, and driving the lower die, the small battery string and the upper die to convey forwards by an external mechanism after welding.
Preferably, the method further comprises the following steps after the step of S4:
s5, repeating the steps S1-S4 to obtain the next group of small battery string units;
and S6, transmitting the next group of small battery string units, the upper die and the lower die to the back of the upper group of small battery string units, placing the head small segment of the next group of small battery string units on the welding strip on the tail small segment of the upper group of small battery string units, and keeping the gap between the head small segment of the next group of small battery strings and the last small segment of the upper group of small battery strings to be S or S'.
The utility model provides a solar cell cluster production facility, includes scribing device, burst device, welds area laying device, moves the piece device, wherein: the slicing device is used for dividing the whole battery piece into n small slices, and the slicing device is used for synchronously arranging the n small slices at corresponding intervals; the welding strip laying device is used for synchronously placing n groups of welding strips on n small chips; the sheet moving device is used for synchronously placing n upper dies above the n groups of welding strips.
Preferably, the production equipment further comprises a feeding device, a conveying device and a welding device for the whole battery piece, wherein: the whole-cell feeding device is used for providing a whole cell to the scribing device, the scribing device is used for dividing the whole cell into n small sub-sheets, and the scribing device is used for synchronously arranging the n small sub-sheets at corresponding intervals; the welding strip laying device is used for synchronously placing n groups of welding strips on n small chips; the sheet moving device is used for synchronously placing n upper dies above the n groups of welding strips; the sheet moving device is also used for synchronously placing the small separated sheets with the welding belts and the upper die on the lower die, and the conveying device synchronously conveys the lower die, the small battery separated sheets, the welding belts and the upper die to the welding device for welding.
Preferably, the slicing device is used for arranging the n small slices according to the distance between every two small slices, wherein the distance is greater than or equal to [ (B/n) + s-15mm ] mm, B is the side length of the whole battery slice, n is the number of slices, s is the gap between the small slices of the battery, after the small slices are welded with the welding strip, the gap s between two adjacent small slices forming the same string is a number between-1.5 and 5mm, and the gap s' between two adjacent small slices forming different strings is a number between 16 and 60 mm.
The invention provides two cloth pieces and welding ideas after the whole piece is divided into small pieces, wherein the two ideas are respectively n small piece synchronous cloth pieces and synchronous welding divided by taking the whole piece of battery piece as a unit, and sequential cloth pieces and synchronous welding by taking one small piece as a unit.
When the whole battery piece is used as a unit for distributing and welding, on the basis of not reducing the production efficiency and considering the easy maintenance, no matter a whole battery piece is cut into a plurality of units, the functions of transmission, splitting, cloth tape, welding and the like are considered as a whole, so that the battery strings after the required splitting are produced by welding.
Drawings
Fig. 1 and 2 are schematic flow charts of an embodiment of the present invention. In the two schematic diagrams, the lower die used in fig. 1 is an integral and fixed lower die, and the lower die used in fig. 2 is a single lower die corresponding to the small segment and moving along with the small segment.
Fig. 3, 4, 5, 6 and 7 are schematic flow charts of another preferred embodiment of the present invention. In fig. 3, 4, 5, 6, 7, two ways of bringing adjacent small segments closer together are also shown, i.e. adjusting the distance s' to s.
FIG. 8 is a schematic view of a production apparatus for carrying out the present invention.
In the figure: the device comprises a whole battery piece 1, a small piece 2, a welding belt 3, an upper die 4, a lower die 5, a welding head 6, a small battery string 100, production equipment 200, a whole battery piece feeding device 20, a scribing device 30, a piece separating device 40, a welding belt laying device 50, a piece moving device 60, a conveying device 70 and a welding device 80.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
A solar cell string production method comprises the following steps:
s1, synchronously paving n small battery slices 2 formed by cutting the whole battery slice 1 on a base station, separating two adjacent small battery slices 2 by a corresponding distance, such as A ' or A, and enabling the size of A ' or A to be at least the length capable of accommodating a welding strip of a welding section of one small battery slice, namely if the side length of the whole battery slice is B, the number of the slices is n, and the gap between the small battery slices is S, the A ' or A is larger than or equal to any number of (B/n) + S-15 mm; the small segments 2 formed by cutting the whole cell piece 1 are preferably the small cell segments 2 with the same width;
s2, when the whole battery piece 1 is taken as a unit, the upper die 4 is placed above the prepared n groups of welding strips 3, the prepared n groups of welding strips 3 are synchronously placed above the n small sub-pieces 2, and the n small sub-pieces 2 are synchronously placed on the n lower dies 5, wherein the three operations are not in sequence;
s3, adjusting the distance between the adjacent small slices 2 and the welding strips, the upper die and the lower die on the small slices to ensure that the small slices 2 behind are placed above the welding strips 3 on the small slices 2 ahead to form small battery strings 100 with the small slices and the welding strips interconnected with each other at corresponding gaps;
the adjustment of the distance between the adjacent small segments 2 includes at least two embodiments, one is to shorten the distance between the adjacent small segments 2 to be S when the distance separating the adjacent two small battery segments 2 in the step S1 is greater than S, and the other is to adjust the distance between the adjacent small segments 2 to be a fine adjustment distance to make the distance fall within the range of S when the distance separating the adjacent two small battery segments 2 in the step S1 is equal to S.
In step S1, the adjusted distance between two adjacent small segments 2 is B/n + S-15, where B is the side length of the whole battery piece 1, n is the number of the small segments 2 after the whole battery piece 1 is split, and S is the gap between two adjacent small segments 2 in the battery string formed by welding the battery small segments and the welding strip.
As a preferred embodiment, the gap s between two adjacent small slices 2 forming the same string is any number from-1.5 mm to 5mm, and the gap s' between two adjacent small slices 2 forming different strings is any number from 16 mm to 60 mm.
And S4, conveying the small battery strings 100, the upper die 4 and the lower die 5 to a welding station, and driving the lower die 5, the small battery strings 100 and the upper die 4 to convey forwards by an external mechanism after welding.
The whole battery piece 1 is a whole battery piece 1 with any size, such as battery pieces of 156.75, 166, 210, etc., the small sub-pieces 2 are small sub-pieces 2 obtained by splitting the whole battery piece 1, the welding strip 3 is a flat welding strip 3, a cylindrical welding strip 3 or a reflective welding strip 3, or the cylindrical welding strip 3 or a special-shaped welding strip 3 (such as a triangle, a diamond, etc.) is shaped into a flat welding strip 3 at the connection section of the battery piece and the battery piece.
The number of the solder strips 3 arranged on a single small segment 2 is prepared according to the number n of the battery segments and the number of main grid lines (such as 9 grids, 10 grids, 12 grids and the like) of each small segment 2.
The length of the solder strip 3 is the length of the solder strip used for connecting the two battery small segments 2.
In the scheme, corresponding upper die 4 and lower die 5 are configured for each small battery piece 2 and welding strip 3, and the upper die 4 and the lower die 5 synchronously follow the small battery piece 2, namely move together with the battery piece. In the prior art, because the battery piece and the welding strip 3 are transmitted by the transmission mechanism, high temperature is transmitted to the battery piece and the welding strip 3 during welding, the battery piece and the welding strip 3 are transmitted forwards after welding, the battery piece and the welding strip 3 are taken down from a welding table by the transmission mechanism during forward transmission and are moved to other platforms, such as a conveying belt, and at the moment, the battery piece and the welding strip 3 still keep partial high temperature during welding and are suddenly placed on other platforms with room temperature or lower temperature, and the battery piece is easy to crack or subfissure due to temperature difference.
This scheme is when the welding, it pushes down and welds area 3 to go up mould 4, act on by bonding tool 6 and weld area 3 and little burst 2, weld, the welding adopts high temperature welding, after the welding, need not to pause, need not to blow the cooling, need not to change the position, drive the little burst 2 of battery on lower mould 5 and the lower mould 5 by transport mechanism at once, weld area 3, it transmits forward together to go up mould 4, at this moment, the little burst 2 of battery and weld area 3 and place on lower mould 5 all the time, with the lower platform contact of external temperature be lower mould 5, do not have the problem with battery piece direct contact, do not have the cracked problem of difference in temperature and lead to the battery piece yet.
Further, the steps S2 and S3 are:
s2, placing n upper dies 4 above the prepared n groups of welding strips 3, and synchronously placing the prepared n groups of welding strips 3 and the n upper dies 4 thereon above the n small sub-chips 2;
s3, synchronously placing n small fragments 2 and n groups of welding strips 3 and n upper dies 4 on the small fragments 2 on the n lower dies 5, and adjusting the distance between the adjacent small fragments 2 and the welding strips 3 on the small fragments 2 and the upper dies 4 or the lower dies 5 so that the small fragments 2 behind are placed above the welding strips 3 on the small fragments 2 ahead to form small battery strings 100 with the small fragments 2 and the welding strips 3 interconnected with corresponding gaps, wherein in the step, the two operations are not in sequence; fig. 5 and 6.
Further, the steps S2 and S3 are:
s2, placing n upper dies 4 above the prepared n groups of welding strips 3, placing the n groups of welding strips 3 and the n upper dies 4 thereon on n lower dies 5, and synchronously placing the n groups of welding strips 3 on which the n upper dies 4 and the n lower dies 5 are placed above the n small chips 2;
s3, adjusting the distance between the adjacent small slices 2 and the welding strips 3, the upper die 4 and the lower die 5 on the small slices 2 to enable the small slices 2 behind to be placed above the welding strips 3 on the small slices 2 ahead to form small battery strings 100 with the small slices 2 and the welding strips 3 interconnected with corresponding gaps; fig. 7.
Further, the steps S2 and S3 are:
s2, synchronously placing n groups of prepared welding strips 3 above the n small sub-chips 2, and placing n upper dies 4 above the n groups of prepared welding strips 3;
s3, synchronously placing n small slices 2 and n groups of welding strips 3 and n upper dies 4 on the small slices 2 on the n lower dies 5, and adjusting the distance between the adjacent small slices 2 and the welding strips 3 on the small slices 2 and the upper dies 4 or the lower dies 5 to enable the small slices 2 behind to be placed above the welding strips 3 on the small slices 2 ahead to form small battery strings 100 with the small slices 2 and the welding strips 3 interconnected with corresponding gaps; in the step, the two operations are not in sequence; fig. 3 and 4.
Further, when the distance between the adjacent small sub-sheets 2 and the welding strips 3, the upper die 4 or the lower die 5 thereon is adjusted in the above steps, based on one small sub-sheet 2 of the n small sub-sheets and the welding strip 3, the upper die 4 or the lower die 5 thereon, the other small battery sub-sheets 2 and the welding strips 3, the upper die 4 or the lower die 5 thereon are synchronously conveyed to approach towards the reference small battery sub-sheet 2 and the welding strips 3, the upper die 4 or the lower die 5 thereon, and the adjacent small battery sub-sheets 2 and the welding strips 3, the upper die 4 or the lower die 5 thereon synchronously, so that the gap between the adjacent two small sub-sheets 2 forming the same string is s, the gap between the adjacent two small sub-sheets 2 forming different strings is s', and the rear small sub-sheet 2 is placed on the welding strip 3 on the front small sub-sheet 2, so as to form a group of small battery string 100 units. s'
The distance adjustment procedure is to move the n-1 small slices 2 closer to the header small slice 2 at the same time, which saves at least t-2/t-1 time compared to moving the small slices 2 closer to each other in sequence. Moreover, when moving close to each other, each small segment 2 may move with reference to the header small segment 2, or may move with reference to an adjacent previous small segment 2, and both of these manners can implement the step function, and the step function is not limited to these two manners.
Further, when each small segment 2 is taken as a unit, S1, laying one small segment 2 of the n small cell segments 2 formed by dividing the whole cell 1 on the base;
s2, placing a group of prepared welding strips 3 above a small sub-slice 2, and placing an upper die 4 above the group of welding strips 3;
s3, sequentially placing n-1 small sub-sheets 2, n-1 groups of welding strips 3 and n-1 upper dies 4, and correspondingly placing the n-1 small sub-sheets 2 and the n-1 groups of welding strips 3 and the n-1 upper dies 4 on the n-1 lower dies 5 to form small battery strings 100 with the small sub-sheets and the welding strips interconnected with corresponding gaps;
and S4, conveying the small battery strings 100, the upper die 4 and the lower die 5 to a welding station, and driving the lower die 5, the small battery strings 100 and the upper die 4 to convey forwards by an external mechanism after welding. See fig. 1, 2.
In this scheme, can adopt laser technology to cut apart into a plurality of small pieces with whole solar wafer 1, adopt again to carry a small piece 2, arrange once and weld area 3, the mode of once of forward transmission, like this, also can accomplish the welding of the little piece 2 of piecemeal battery piece 1, but welding efficiency is lower, and welding efficiency is 2000 pieces per hour, then if the whole piece is split into 4 small pieces, equipment transmission welding efficiency will reduce nearly half.
In this scheme, set up a corresponding lower mould 5 for each small fragment 2, lower mould 5 follows up in small fragment 2, has avoided the problem that small fragment 2 cracked because of the difference in temperature after the welding.
Further, the following steps are included after the step of S4:
s5, repeating the steps S1-S4 to obtain the next group of small battery string 100 units;
and S6, transmitting the next group of small battery string 100 units, the upper die and the lower die 5 to the back of the upper group of small battery string 100 units, placing the head small fragment 2 of the next group of small battery string 100 units on the welding strip 3 on the tail small fragment 2 of the upper group of small battery string 100 units, and keeping the gap between the head small fragment 2 of the next group of small battery string 100 and the last small fragment 2 of the upper group of small battery string 100 to be S or S'.
Referring to fig. 8, the present invention further provides a solar cell string production apparatus 200, which includes a dicing device 30, a separating device 40, a solder strip laying device 50, and a sheet conveying device 60, wherein: the scribing device 30 is used for dividing the whole battery piece 1 into n small pieces 2, and the slicing device 40 is used for synchronously arranging the n small pieces 2 at corresponding intervals; the welding strip laying device 50 is used for synchronously placing n groups of welding strips 3 on the n small pieces 2; the sheet conveying device 60 is used for synchronously placing n upper dies 4 above n groups of welding strips 3.
Further, the production equipment further comprises a feeding device 20, a conveying device 70 and a welding device 80 for the whole battery piece, wherein: the feeding device of the whole battery piece 1 is used for providing the whole battery piece to the scribing device 30, the scribing device 30 is used for dividing the whole battery piece 1 into n small pieces 2, and the dividing device 40 is used for synchronously arranging the n small pieces 2 at corresponding intervals; the welding strip laying device 50 is used for synchronously placing n groups of welding strips 3 on the n small pieces 2; the sheet moving device 60 is used for synchronously placing n upper dies 4 above the n groups of welding strips 3; the sheet moving device 60 is further configured to synchronously place the small sheet 2 on which the welding strip 3 and the upper die 4 are arranged on the lower die 5, and the conveying device 70 synchronously conveys the lower die 5, the small battery sheet 2, the welding strip 3 and the upper die 4 to the welding device 80 for welding.
Further, the slicing device 40 is configured to arrange the n small slices 2 at a distance greater than or equal to [ (B/n) + s-15mm ] mm between every two small slices 2, where B is a side length of the whole battery piece, n is a slice number, and s is a gap between the small battery slices, and after the small slices 2 are welded to the welding strip 3, a gap s between two adjacent small slices 2 forming the same string is an arbitrary number of-1.5 to 5mm, and a gap s' between two adjacent small slices 2 forming different strings is an arbitrary number of 16 to 60 mm.
The modules or units in the device of the embodiment of the invention can be combined, divided and deleted according to actual needs.
The above disclosure is only illustrative of the preferred embodiments of the present invention, which should not be taken as limiting the scope of the invention, but rather the invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It will be understood by those skilled in the art that all or a portion of the above-described embodiments may be practiced and equivalents thereof may be resorted to as falling within the scope of the invention as claimed. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may include only a single embodiment, and such description is for clarity only, and those skilled in the art will be able to make the description as a whole, and the embodiments may be suitably combined to form other embodiments as will be apparent to those skilled in the art.
Claims (10)
1. A method for producing a solar cell string is characterized by comprising the following steps:
s1, synchronously laying n small battery slices formed by cutting the whole battery slice on the base station to separate two adjacent small battery slices by corresponding intervals;
s2, taking a whole battery piece as a unit, placing n upper dies above n groups of prepared welding strips, synchronously placing n groups of prepared welding strips above n small pieces, and synchronously placing n small pieces on n lower dies, wherein the three operations are not in sequence;
s3, adjusting the distance between the adjacent small fragments to enable the small fragments behind to be placed above the welding strips on the small fragments in front, and forming small battery strings with the small fragments and the welding strips mutually connected in corresponding gaps;
and S4, conveying the small battery string, the upper die and the lower die to a welding station, and driving the lower die, the small battery string and the upper die to convey forwards by an external mechanism after welding.
2. The solar cell string production method according to claim 1, characterized in that: the steps S2 and S3 are as follows:
s2, placing n upper dies above the prepared n groups of welding strips, and synchronously placing the n upper dies and the n groups of welding strips above the n small slices;
s3, synchronously placing the n small fragments and the n groups of welding strips and the n upper dies on the n lower dies, and adjusting the distance between the adjacent small fragments and the welding strips on the small fragments, the upper dies or the lower dies so that the following small fragments are placed above the welding strips on the preceding small fragments to form small battery strings with the small fragments and the welding strips interconnected with each other at corresponding gaps.
3. The solar cell string production method according to claim 1, characterized in that: the steps S2 and S3 are as follows:
s2, placing n upper dies above the prepared n groups of welding strips, synchronously placing the n groups of welding strips and the n upper dies on the n lower dies, and synchronously placing the n groups of welding strips on which the n upper dies and the n lower dies are placed above the n small split sheets;
and S3, adjusting the distance between the adjacent small slices and the welding strips on the small slices, the upper die and the lower die so that the small slices behind are placed above the welding strips on the small slices ahead to form small battery strings with the small slices and the welding strips interconnected with corresponding gaps.
4. The solar cell string production method according to claim 1, characterized in that: the steps S2 and S3 are as follows:
s2, synchronously placing n groups of prepared welding strips above the n small split sheets, and placing n upper dies above the n groups of welding strips;
s3, synchronously placing n small fragments and n groups of welding strips and n upper dies on the small fragments on n lower dies, and adjusting the distance between the adjacent small fragments and the welding strips on the small fragments, the upper dies or the lower dies so as to enable the small fragments on the back to be placed above the welding strips on the small fragments on the front to form small battery strings with the small fragments and the welding strips interconnected with each other at corresponding gaps; in this step, the two operations are not in sequence.
5. The solar cell string production method according to claim 1, characterized in that: when the distance between the adjacent small sub-slices and the welding strips and the upper dies or the lower dies on the adjacent small sub-slices is adjusted in the steps, on the basis of one small sub-slice in the n small sub-slices and the welding strips and the upper dies or the lower dies on the small sub-slices, other small battery sub-slices and the welding strips and the upper dies or the lower dies on the small battery sub-slices are synchronously conveyed to be close to the small battery sub-slices and the welding strips and the upper dies or the lower dies on the small battery sub-slices, so that the gap between the adjacent two small sub-slices forming the same string is s, the gap between the adjacent two small sub-slices forming different strings is s', and the small sub-slices at the back are placed on the welding strips on the small sub-slices at the front to form a group of small battery string units.
6. The solar cell string production method according to claim 1, characterized in that: s1, paving one small piece of the n small battery pieces formed by cutting the whole battery piece on the base;
s2, placing a group of prepared welding strips above a small slice, and placing an upper die above the group of welding strips;
s3, sequentially placing n-1 small sub-slices, n-1 group welding strips and n-1 upper dies, and correspondingly placing the n-1 small sub-slices, the n-1 group welding strips on the n-1 small sub-slices and the n-1 upper dies on the n-1 lower dies to form small battery strings with the small sub-slices and the welding strips interconnected in corresponding gaps;
and S4, conveying the small battery string, the upper die and the lower die to a welding station, and driving the lower die, the small battery string and the upper die to convey forwards by an external mechanism after welding.
7. The solar cell string production method according to claim 1, characterized in that: the step of S4 is followed by the steps of:
s5, repeating the steps S1-S4 to obtain the next group of small battery string units;
and S6, transmitting the next group of small battery string units, the upper die and the lower die to the back of the upper group of small battery string units, placing the head small segment of the next group of small battery string units on the welding strip on the tail small segment of the upper group of small battery string units, and keeping the gap between the head small segment of the next group of small battery strings and the last small segment of the upper group of small battery strings to be S or S'.
8. A solar cell string production apparatus characterized in that: including scribing device, burst device, welding area laying device, move the piece device, wherein: the slicing device is used for dividing the whole battery piece into n small slices, and the slicing device is used for synchronously arranging the n small slices at corresponding intervals; the welding strip laying device is used for synchronously placing n groups of welding strips on n small chips; the sheet moving device is used for synchronously placing n upper dies above the n groups of welding strips.
9. The solar cell string production apparatus according to claim 8, wherein: the production equipment also comprises a feeding device, a conveying device and a welding device of the whole battery piece, wherein: the whole-cell feeding device is used for providing a whole cell to the scribing device, the scribing device is used for dividing the whole cell into n small sub-sheets, and the scribing device is used for synchronously arranging the n small sub-sheets at corresponding intervals; the welding strip laying device is used for synchronously placing n groups of welding strips on n small chips; the sheet moving device is used for synchronously placing n upper dies above the n groups of welding strips; the sheet moving device is also used for synchronously placing the small separated sheets with the welding belts and the upper die on the lower die, and the conveying device synchronously conveys the lower die, the small battery separated sheets, the welding belts and the upper die to the welding device for welding.
10. The solar cell string production apparatus according to claim 8, wherein: the slicing device is used for arranging the n small slices according to a gap larger than or equal to [ (B/n) + s-15mm ] mm between every two adjacent small slices, B is the side length of the whole battery slice, n is the number of slices, s is the gap between the small slices of the battery, after the small slices are welded with the welding strip, the gap s between the two adjacent small slices forming the same string is any number of-1.5-5 mm, and the gap s' between the two adjacent small slices forming different strings is any number of 16-60 mm.
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