CN114951882B - IBC multi-group grid battery string welding method - Google Patents
IBC multi-group grid battery string welding method Download PDFInfo
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- CN114951882B CN114951882B CN202210810592.8A CN202210810592A CN114951882B CN 114951882 B CN114951882 B CN 114951882B CN 202210810592 A CN202210810592 A CN 202210810592A CN 114951882 B CN114951882 B CN 114951882B
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- 238000003466 welding Methods 0.000 title claims abstract description 136
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000001179 sorption measurement Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 12
- 239000003292 glue Substances 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 5
- 229910000679 solder Inorganic materials 0.000 claims description 4
- 238000002503 electroluminescence detection Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/06—Solder feeding devices; Solder melting pans
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
-
- 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
- H01L31/04—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 adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention belongs to the technical field of battery serial connection, in particular to a method for welding an IBC multi-group grid battery string, which comprises the following steps: separating each battery piece from the cutting seam to form two independent half pieces, and rotating one half piece in each battery piece by 180 degrees by taking a line which is perpendicular to the half piece and is positioned at the geometric center of the half piece as an axis; then, all pad points in the middle of the same row on each half piece are welded for the first time through the same welding strip; then cutting the welding strips on the battery strings according to a certain rule, and welding each unwelded pad point on each half piece with the corresponding welding strip, thereby solving the problems of low welding efficiency and large overall error caused by the current series welding mode of the electrodes of the battery pieces.
Description
Technical Field
The invention belongs to the technical field of battery serial connection, and particularly relates to a method for welding an IBC multi-group grid battery serial connection.
Background
The front surface of the IBC battery piece is not provided with a grid line, and the positive electrode and the negative electrode are arranged on the back surface of the battery piece, so that shading of the battery piece is reduced, and the light conversion efficiency of the battery piece is improved. By dividing the battery plate into two, the power of the battery assembly can be increased. The traditional mode of carrying out series connection welding with the battery piece of one division into two is firstly cut into the syllogic with the welding strip in advance, then weld the welding strip between the IBC battery piece after adjacent one division into two, because the distance between two adjacent pad points on the battery piece is little to the welding strip of cutting into the syllogic is also little, thereby increased when the welding and placed the degree of difficulty of welding work of cutting into the welding strip of syllogic, and then make the welding efficiency of this kind of welding mode low, and in the in-process of cutting out the welding strip itself have the error, melt the welding strip when adding the welding, after leading to the battery piece to form the battery cluster, the error of whole length is bigger.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and the method comprises the steps of firstly fixing and placing the battery pieces which are divided into two parts, carrying out first welding on all pad points in the middle of the same row on a half piece through the same welding strip, cutting the battery string welded by the half piece into battery strings, and then welding all pad points which are not welded with the welding strip on each battery string with the corresponding welding strip, so that the efficiency of series welding of the battery pieces can be improved, and the problems of low welding efficiency and large overall error caused by the current series welding mode of electrodes of the battery pieces are solved.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an IBC multi-group grid cell string welding method comprising:
1) Separating each battery piece from the cutting seam to form two independent half pieces, and rotating one half piece in each battery piece by 180 degrees by taking a line which is perpendicular to the half piece and is positioned at the geometric center of the half piece as an axis;
2) Spraying UV glue around all pad points on each half piece after the step 1, and simultaneously ensuring that the pad points are not sprayed by the UV glue;
3) Printing solder paste on all pad points on each half piece after the step 2;
4) Laying a plurality of half sheets after the step 3 into a string of battery strings in a state that the surface provided with the electrode faces upwards, ensuring that the polarities of the grid lines connected with pad points on different half sheets on the same straight line on any two adjacent half sheets are opposite, and simultaneously presetting gaps between any two adjacent half sheets;
5) Carrying out first welding on all pad points in the middle of the same row on each half piece after the step 4 through the same welding strip, and reserving a plurality of pad points at two ends of each row on each half piece for not welding when carrying out first welding;
6) Dividing the battery string passing through the step 5 into a plurality of battery strings, wherein each battery string is internally provided with X pieces of the half pieces, and X belongs to a natural number larger than 0.
7) Cutting the welding strips in all odd gaps on the N row pad points on the battery strings after the step 6; and cutting out the welding strips in all even gaps on the n+1th row pad points on the battery small string; the N is a natural number greater than 0;
or:
cutting the welding strips in all even gaps on the N row pad points on the battery string in the step 5; and cutting welding strips in all odd gaps on the n+1th row pad points on the battery small string; the N is a natural number greater than 0;
8) Cutting the welding strips at the two ends of the battery string after the step 7, wherein the cutting mode is as follows: if the welding strip is connected with the first half piece and the second half piece which are started at the end part of the battery string, the welding strip is sheared off from the part of the first half piece which is towards the end part of the battery string and exceeds the end part of the battery string; if the welding strip is not connected with the first half piece and the second half piece which are started at the end part of the battery string, only the part of the welding strip facing the end part of the battery string is partially cut
9) And (3) performing secondary welding on the battery strings subjected to the step (8), wherein each unwelded pad point after the step (6) is welded with a corresponding welding strip.
Preferably, in the step 5, the welding strip and the half sheet before and during the pad spot welding are heated in an auxiliary manner.
Preferably, in step 5, the welding strip is pressed down to a pad point close to the battery string.
Preferably, in step 7, the position correction of each battery string is further included before cutting.
Preferably, the method further comprises a detection step after the step 8, wherein the detection step detects the battery string through an EL detection device, and if the detection result is qualified, the battery string is conveyed to a blanking conveying device; and if the detection result is unqualified, carrying the battery string to the NG material box.
Preferably, each half piece is fixed in position through a negative pressure adsorption table corresponding to the half pieces one by one, a plurality of adsorption holes are formed in the upper surface of each negative pressure adsorption table, and the distance between two adjacent negative pressure adsorption tables is larger than the length formed by pad points which are positioned on the same line between two adjacent half pieces and are not welded with the welding strip.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, after the battery pieces which are divided into two parts are fixedly placed, all pad points in the middle of the same row on the half piece are welded for the first time through the same welding strip, then the battery strings welded by the half piece are cut into battery strings, and then the remaining pad points which are not welded with the welding strips on each battery string are welded with the corresponding welding strips, so that the serial welding efficiency of the battery pieces can be improved, and the problems of low welding efficiency and large overall error caused by the current serial welding mode of electrodes of the battery pieces are solved.
2. According to the invention, the welding strips are straightened, so that the same welding strip is paved on the pad points on the same row on the battery string in a tensioning state, the use amount of the welding strips can be reduced under the condition that the welding strips are straightened, and meanwhile, the battery string is attractive and convenient to weld.
Drawings
FIG. 1 is a schematic view of a battery plate according to the present invention;
FIG. 2 is a schematic view of a battery piece according to the present invention, wherein a battery piece is separated from a cutting seam to form two separate half pieces, and one of the half pieces is rotated 180 degrees about a line perpendicular to the half piece and located at the geometric center of the half piece;
FIG. 3 is a schematic diagram of a battery string according to the present invention;
FIG. 4 is a schematic structural view of each negative pressure adsorption table for fixing each battery piece in the invention;
FIG. 5 is an enlarged view of FIG. 4 at A
Fig. 6 is a schematic structural view of the adsorption stage.
Wherein, 1, a battery piece; 2. a half piece; 3. welding a belt; 4. a negative pressure adsorption table; 5. adsorption holes.
Detailed Description
Referring to fig. 1-6, an IBC multi-group grid cell string welding method includes:
1) Separating each battery piece 1 from the cutting seam to form two independent half pieces 2, and rotating one half piece 2 in each battery piece 1 by 180 degrees by taking a line which is perpendicular to the half piece 2 and is positioned at the geometric center of the half piece 2 as an axis;
2) Spraying UV glue around all pad points on each half sheet 2 after the step 1, and simultaneously ensuring that the pad points are not sprayed by the UV glue;
3) Printing solder paste on all pad points on each half sheet 2 after the step 2;
4) Laying a plurality of half-sheets 2 after the step 3 into a string of battery strings in a state that the surface provided with the electrode faces upwards, ensuring that the polarities of the grid lines connected with pad points on different half-sheets on the same straight line on any two adjacent half-sheets are opposite, and simultaneously presetting gaps between any two adjacent half-sheets 2;
5) Carrying out first welding on all pad points in the middle of the same row on each half sheet 2 after the step 4 through the same welding strip 3, and reserving a plurality of pad points at two ends of each row on each half sheet 2 for not welding during the first welding;
6) Dividing the battery string passing through the step 5 into a plurality of battery strings, wherein each battery string is internally provided with X pieces of the half pieces 2, and X belongs to a natural number larger than 0.
7) Cutting the welding strips 3 in all odd gaps on the N row pad points on the battery strings after the step 6; cutting the welding strips 3 in all even gaps on the n+1th row pad points on the battery small string; the N is a natural number greater than 0;
or:
cutting the welding strips 3 in all even gaps on the N row pad points on the battery string in the step 5; cutting the welding strips 3 in all odd gaps on the n+1th row pad points on the battery small string; the N is a natural number greater than 0;
8) Cutting the welding strips at the two ends of the battery string after the step 7, wherein the cutting mode is as follows: if the welding strip 3 is connected with the first half piece 2 and the second half piece 2 which are started at the end part of the battery string, the part of the welding strip 3 which is towards the end part of the battery string and exceeds the first half piece 2 which is started at the end part of the battery string is cut off completely; if the welding strip 3 is not connected with the first half piece 2 and the second half piece 2 which are started at the end part of the battery string, only the part of the welding strip 3 facing the end part of the battery string is partially cut
9) And (3) performing secondary welding on the battery strings subjected to the step (8), wherein each unwelded pad point after the step (6) is welded with the corresponding welding strip (3) through the secondary welding.
In the present embodiment, the dicing apparatus separates a whole battery sheet 1 from the dicing slits to form two separate half-sheets 2 (as shown in fig. 2); rotating one half piece 2 in each battery piece 1 by 180 degrees by taking a line which is perpendicular to the half piece 2 and is positioned at the geometric center of the half piece 2 as an axis, wherein each battery piece 1 forms the state of fig. 2, so that the polarities of grid lines connected with pad points positioned on the same straight line on any two adjacent half pieces 2 are opposite; spraying UV glue around all pad points on the battery piece, wherein the spraying needs to avoid all pad points; then printing solder paste on all pad points on the half sheet 2 sprayed with the UV adhesive; at this time, the states of two adjacent half-sheets 2 are still opposite in polarity of the grid line connected with the pad point on the same straight line, and then a gap with a fixed value (a value determined according to the process requirement) is reserved between the two adjacent half-sheets 2; then, laying the welding strip 3 on the pad points of the half pieces 2 according to the laying direction of the half pieces 2, so that all pad points of each half piece 2 on the same straight line are covered by the same welding strip 3; then welding the welding strip 3 with all pad points in the middle of each row on each half piece 2, cutting the whole battery string into a plurality of battery strings, equally leaving a gap with a fixed value between each battery string composed of a plurality of half pieces 2, cutting the welding strip 3 on each battery string after welding, and adopting two cutting modes, as shown in fig. 3:
firstly, cutting the welding strips 3 in all odd gaps on the N row pad points on the battery strings in the step 5; cutting the welding strips 3 in all even gaps on the n+1th row pad points on the battery small string; the N is a natural number greater than 0;
secondly, cutting the welding strips 3 in all even gaps on the N row pad points on the battery strings in the step 5; cutting the welding strips 3 in all odd gaps on the n+1th row pad points on the battery small string; the N is a natural number greater than 0;
after cutting, the remaining pad points on each half piece 2 which are not welded with the welding strip 3 are welded with the corresponding welding strip 3, so that the pad points which are not welded before are welded with the welding strip 3, and all pad points on each battery string finally are welded with the welding strip.
As a preferred manner, the step 5 includes fixing the position of each laid half 2, and then straightening the welding strips 3, so that the same welding strip 3 is laid on the pad points on the same row on the battery string in a tensioned state, and the welding strips 3 are prevented from being wrinkled under the condition that the welding strips 3 are straightened, thereby saving the welding strips 3, and also preventing the situation that the welding strips 3 and the pad points are not welded in place during welding.
In a preferred manner, in the step 5, the welding strip 3 is heated in an auxiliary manner with the half-sheet 2 before and during the pad spot welding for auxiliary welding.
Preferably, the step 5 further includes pressing the welding strip 3 down to a pad point that is close to the battery string, so that a sufficient contact surface between the pad point and the welding strip 3 after welding can be ensured.
As a preferable mode, the step 7 further includes correcting the position of each battery string before cutting, so that each battery string corresponds to a corresponding cutting tool.
As a preferable mode, the method further comprises a detection step after the step 8, wherein the detection step detects the battery string through an EL detection device, and if the detection result is qualified, the battery string is conveyed to a blanking conveying device; and if the detection result is unqualified, carrying the battery string to the NG material box.
As a preferable mode, each half piece 2 is fixed in position by a negative pressure adsorption table 4 corresponding to the half pieces 2 one by one, a plurality of adsorption holes 5 are formed in the upper surface of each negative pressure adsorption table 4, and the distance between two adjacent negative pressure adsorption tables 4 is greater than the length formed by pad points which are positioned on the same line between two adjacent half pieces 2 and are not welded with the welding strip 3. As shown in FIG. 5, since the distance between two adjacent negative pressure adsorption tables 4 is greater than the length of the pad points which are positioned on the same line between two adjacent half pieces 2 and are not welded with the welding strip 3, the half pieces 2 can be bent in a larger radian when being pressed on the two side edges in the direction without damaging the half pieces 2, so that a larger gap can be formed between the half pieces 2 and the welding strip 3, after the design, when the welding strip 3 is cut, the edges of the half pieces 2 can be pressed first to separate the edges of the half pieces 2 from the welding strip 3, and a cutter for cutting the welding strip 3 can be conveniently stretched into the gap to cut the welding strip 3.
Claims (4)
1. An IBC multi-group grid cell string welding method, comprising:
1) Separating each battery piece (1) from the cutting seam to form two independent half pieces (2), and rotating one half piece (2) in each battery piece (1) 180 degrees by taking a line perpendicular to the half piece (2) and positioned at the geometric center of the half piece (2) as an axis;
2) Spraying UV glue around all pad points on each half piece (2) after the step 1, and simultaneously ensuring that the pad points are not sprayed by the UV glue;
3) Printing solder paste on all pad points on each half sheet (2) after the step (2);
4) Laying a plurality of half-sheets (2) after the step 3 into a string of battery strings in a state that the surface provided with the electrode faces upwards, ensuring that the polarities of grid lines connected with pad points on different half-sheets on the same straight line on any two adjacent half-sheets are opposite, and simultaneously presetting gaps between any two adjacent half-sheets (2);
5) Carrying out first welding on all pad points in the middle of the same row on each half piece (2) after the step 4 through the same welding strip (3), and reserving a plurality of pad points at two ends of each row on each half piece (2) for not welding during the first welding;
6) Dividing the battery string in the step 5 into a plurality of battery strings, wherein each battery string is internally provided with X pieces of the half pieces (2), and X belongs to a natural number larger than 0;
7) Cutting the welding strips in all odd gaps on the N row pad points on the battery strings after the step 6; and cutting out the welding strips in all even gaps on the n+1th row pad points on the battery small string; the N is a natural number greater than 0;
or:
cutting the welding strips in all even gaps on the N row pad points on the battery string in the step 5; and cutting welding strips in all odd gaps on the n+1th row pad points on the battery small string; the N is a natural number greater than 0;
8) Cutting the welding strips at the two ends of the battery string after the step 7, wherein the cutting mode is as follows: if the welding strip (3) is connected with the first half piece (2) and the second half piece (2) which are started at the end part of the battery string, the part of the welding strip (3) which faces the end part of the battery string and exceeds the first half piece (2) which is started at the end part of the battery string is cut off completely; if the welding strip (3) is not connected with the first half piece (2) and the second half piece (2) which are started at the end part of the battery string, only partially cutting the part of the welding strip (3) facing the end part of the battery string;
9) Performing secondary welding on the battery strings subjected to the step 8, wherein each unwelded pad point after the step 6 is welded with a corresponding welding strip;
fixing the position of each laid half piece (2), and straightening the welding strips (3) so that the same welding strip (3) is laid on pad points on the same row of the battery string in a tensioning state;
the step 7 further comprises correcting the position of each battery string before cutting;
each half piece (2) is fixed in position through a negative pressure adsorption table (4) corresponding to the half pieces (2) one by one, a plurality of adsorption holes (5) are formed in the upper surface of each negative pressure adsorption table (4), and the distance between every two adjacent negative pressure adsorption tables (4) is larger than the length formed by pad points which are positioned on the same line between every two adjacent half pieces (2) and are not welded with the welding strip (3).
2. The IBC multi-grid battery string welding method according to claim 1, characterized in that in the step 5, the welding strip (3) and the half sheet (2) before and during pad spot welding are heated in an auxiliary manner.
3. The method according to claim 2, wherein the step 5 further comprises pressing the welding strip (3) down to a pad point close to the battery string.
4. The method for welding the battery strings of the IBC multi-grid battery according to claim 1, wherein the method further comprises a detection step after the step 8, wherein the detection step detects the battery strings through an EL detection device, and if the detection result is qualified, the battery strings are conveyed to a blanking conveying device; and if the detection result is unqualified, carrying the battery string to the NG material box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210810592.8A CN114951882B (en) | 2022-07-11 | 2022-07-11 | IBC multi-group grid battery string welding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210810592.8A CN114951882B (en) | 2022-07-11 | 2022-07-11 | IBC multi-group grid battery string welding method |
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| CN114951882A CN114951882A (en) | 2022-08-30 |
| CN114951882B true CN114951882B (en) | 2024-03-22 |
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|---|---|
| CN114951882A (en) | 2022-08-30 |
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