CN212695159U - Stitch welding assembly - Google Patents
Stitch welding assembly Download PDFInfo
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- CN212695159U CN212695159U CN202021615434.XU CN202021615434U CN212695159U CN 212695159 U CN212695159 U CN 212695159U CN 202021615434 U CN202021615434 U CN 202021615434U CN 212695159 U CN212695159 U CN 212695159U
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- 238000003466 welding Methods 0.000 title claims abstract description 29
- 238000005452 bending Methods 0.000 claims description 12
- 229910000679 solder Inorganic materials 0.000 claims description 7
- 238000000034 method Methods 0.000 description 7
- 238000010248 power generation Methods 0.000 description 5
- 230000005484 gravity Effects 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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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
- H01L31/04—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
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model provides a stitch welding subassembly relates to photovoltaic module technical field. The solar cell comprises cell sheets which are mutually overlapped; the adjacent battery pieces are in conductive connection through the conductive interconnection piece, wherein the conductive interconnection piece is provided with a bent section in an overlapping area of the adjacent battery pieces, and the bent section in the conductive interconnection piece is in contact with the battery pieces. The utility model discloses stitch welding subassembly can increase the area of contact of electrically conductive interconnection piece and battery piece, reduces the risk that electrically conductive interconnection piece produced the latent crack in adjacent battery piece overlapping region department to, can prolong the life of stitch welding subassembly to a certain extent.
Description
Technical Field
The utility model relates to a photovoltaic power generation technical field especially relates to a stitch welding subassembly.
Background
Photovoltaic modules are devices that can convert light energy into electrical energy, and with the development of photovoltaic module technology, photovoltaic modules are widely used at present.
In order to improve the photoelectric conversion efficiency of the photovoltaic module and the power generation available area of the module, a stitch welding module is generally adopted, and adjacent battery pieces in the stitch welding module are mutually overlapped and are conductively connected through a conductive interconnection piece. The stitch welding assembly is connected by adopting the conductive interconnection piece, so that the matching degree with the existing production line is high, and the stitch welding assembly is applied to a plurality of fields.
However, in the stitch-welded assembly, at the position where the adjacent battery pieces overlap, the contact area between the battery pieces and the conductive interconnection is small, and hidden cracks are easily generated in the overlapping region.
SUMMERY OF THE UTILITY MODEL
The utility model provides a stitch welding subassembly to easily produce the problem of latent splitting in the overlapping region of solving adjacent battery piece.
The embodiment of the utility model provides a stitch welding assembly, which comprises mutually lapped battery pieces;
the adjacent battery pieces are in conductive connection through the conductive interconnection piece, wherein the conductive interconnection piece is provided with a bent section in an overlapping area of the adjacent battery pieces, and the bent section in the conductive interconnection piece is in contact with the battery pieces.
Optionally, on a surface parallel to the light-facing surface of the battery plate, a projection of the bent section of the conductive interconnection piece is U-shaped or zigzag.
Optionally, the surface of the battery piece is provided with a plurality of first electrodes, and in a direction perpendicular to the extending direction of the conductive interconnection piece, the size of the bent section of the conductive interconnection piece is smaller than the distance between the adjacent first electrodes.
Optionally, the conductive interconnection has a bent section with a dimension of 5mm to 25mm in a direction perpendicular to an extending direction of the conductive interconnection.
Optionally, the conductive interconnection has a cross-sectional shape in a plane perpendicular to the extending direction of the conductive interconnection that is circular, rectangular, or triangular.
Optionally, the size of the overlapping area is 1mm-6mm in a direction parallel to the extending direction of the conductive interconnection.
Optionally, a first electrode is arranged on a light facing surface of the battery piece, and a second electrode is arranged on a backlight surface;
the conductive interconnection piece is conductively connected with a first electrode of one cell piece and a second electrode of an adjacent cell piece, wherein the first electrode and the second electrode are opposite in polarity.
Optionally, the conductive interconnect is a solder strip.
The embodiment of the utility model provides a stitch welding subassembly, including mutual lapped battery piece, electrically conductive the connection through electrically conductive interconnection piece between the adjacent battery piece. The conductive interconnection piece is provided with a bent section in the overlapping area of the adjacent battery pieces, and the bent section in the conductive interconnection piece is in contact with the battery pieces. In the overlapping area of adjacent battery pieces, the bending sections in contact with the battery pieces are added on the conductive interconnection pieces, so that the contact area between the conductive interconnection pieces and the battery pieces can be increased. Because between the battery piece of overlap joint each other, electrically conductive interconnection piece can receive the action of gravity of the battery piece that is located the top in overlap region department, after the area of contact of electrically conductive interconnection piece and battery piece increases, can disperse the effort that the battery piece that is located the top acted on electrically conductive interconnection piece in overlap region department to make electrically conductive interconnection piece atress even, can avoid electrically conductive interconnection piece and battery piece area of contact undersize to make electrically conductive interconnection piece concentrate the atress, and lead to electrically conductive interconnection piece easily to produce the condition of hidden fracture in the atress department. Therefore, the utility model discloses stitch welding subassembly can increase the area of contact of electrically conductive interconnection piece and battery piece, reduces the risk that electrically conductive interconnection piece produced the latent crack in adjacent battery piece overlapping region department, can also prolong the life of stitch welding subassembly to a certain extent.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 shows a schematic structural view of a stitch-welding assembly according to an embodiment of the present invention;
fig. 2 shows a schematic structural view of a conductive interconnect of an embodiment of the present invention;
fig. 3 shows a schematic view of the structure along the direction a in fig. 1.
Description of reference numerals:
10-stitch welded assembly, 11-cell, 111-first cell, 112-second cell, 113-overlap region, 114-light facing surface, 12-conductive interconnection, 121-bend section, B-conductive interconnection extension direction, C-direction perpendicular to B-direction, L-bend section dimension in C-direction, h-overlap region dimension in B-direction, d-spacing between adjacent first electrodes.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 to 3, the present invention provides a stitch-welding assembly 10 including overlapping battery pieces 11.
The adjacent battery plates 11 are electrically connected through the conductive interconnection piece 12, wherein the conductive interconnection piece 12 has a bent section 121 in the overlapping area 113 of the adjacent battery plates 11, and the bent section 121 in the conductive interconnection piece 12 is in contact with the battery plates 11.
Specifically, as shown in fig. 1, the stitch-welded assembly 10 includes the battery pieces 11 overlapped with each other, wherein the first battery piece 111 is overlapped above the second battery piece 112, and the first battery piece 111 and the second battery piece 112 are partially overlapped to form an overlapping region 113. The adjacent battery pieces 11 are electrically connected through the conductive interconnection 12, that is, the conductive interconnection 12 can conduct the positive electrode of one battery piece 11 and the negative electrode of the adjacent battery piece 11. As shown in fig. 1, assuming that light irradiates the stitch-welded assembly 10 along the direction a, the conductive interconnection 12 can electrically connect electrode grids on the light-facing surface 114 of the second cell 112 with electrode grids on the back surface of the first cell 111, so that electrical signal transmission between the first cell 111 and the second cell 112 can be realized. Wherein the conductive interconnect 12 may be a solder strip.
As shown in fig. 2, the conductive interconnection 12 has a bending section 121 in the overlapping region 113 of the adjacent battery cells 11, and the bending section 121 may be U-shaped or zigzag, and the embodiment of the present invention is not limited thereto. Wherein the bent section 121 is in contact with the battery cell 11, as shown in fig. 3. As can be seen from fig. 1, the conductive interconnection 12 is under the action of the gravity G of the first cell 111 in the overlapping region 113, and the bent section 121 of the conductive interconnection 12 is in contact with the first cell 111 and the second cell 112 in the overlapping region 113, so that the contact area between the conductive interconnection 12 and the cell 11 can be increased, the conductive interconnection 12 is uniformly stressed in the overlapping region 113, the situation that the conductive interconnection 12 is intensively stressed in the overlapping region 113 to cause hidden cracking can be avoided, and the hidden cracking risk of the conductive interconnection 12 in the overlapping region 113 can be reduced.
The embodiment of the utility model provides a stitch welding subassembly, including mutual lapped battery piece, electrically conductive the connection through electrically conductive interconnection piece between the adjacent battery piece. The conductive interconnection piece is provided with a bent section in the overlapping area of the adjacent battery pieces, and the bent section in the conductive interconnection piece is in contact with the battery pieces. In the overlapping area of adjacent battery pieces, the bending sections in contact with the battery pieces are added on the conductive interconnection pieces, so that the contact area between the conductive interconnection pieces and the battery pieces can be increased. Because between the battery piece of overlap joint each other, electrically conductive interconnection piece can receive the action of gravity of the battery piece that is located the top in overlap region department, after the area of contact of electrically conductive interconnection piece and battery piece increases, can disperse the effort that the battery piece that is located the top acted on electrically conductive interconnection piece in overlap region department to make electrically conductive interconnection piece atress even, can avoid electrically conductive interconnection piece and battery piece area of contact undersize to make electrically conductive interconnection piece concentrate the atress, and lead to electrically conductive interconnection piece easily to produce the condition of hidden fracture in the atress department. Therefore, the utility model discloses stitch welding subassembly can increase the area of contact of electrically conductive interconnection piece and battery piece, reduces the risk that electrically conductive interconnection piece produced the latent crack in adjacent battery piece overlapping region department, can also prolong the life of stitch welding subassembly to a certain extent.
Alternatively, referring to fig. 2 and 3, on the surface parallel to the light-facing surface 114 of the battery cell 11, the bent section 121 of the conductive interconnection piece 12 has a U-shaped or zigzag projection.
Specifically, on the surface parallel to the light-facing surface 114 of the cell 11, wherein the light-facing surface 114 of the cell 11 is as shown in fig. 3, the projection of the bent section 121 of the conductive interconnection 12 is U-shaped or zigzag, and fig. 2 shows the projection of the bent section 121 of the conductive interconnection 12 is U-shaped. The U-shaped bending section 121 has fewer turning points and is easy to bend and form, and the parallel structure with two lengths of L at the U-shaped bending section 121 can increase the contact area between the conductive interconnection piece 12 and the battery piece 11, so that the hidden crack risk of the conductive interconnection piece 12 in the overlapping region 113 of the battery piece 11 can be reduced. Of course, when the bent section 121 is in a zigzag shape and the length L is the same, the contact area between the zigzag bent section 121 and the battery piece 11 is larger, so that the risk of hidden cracks of the conductive interconnection piece 12 can be further reduced. Of course, a person skilled in the art can set the specific structure of the bending section 121 according to actual situations, and the embodiment of the present invention does not limit this.
Alternatively, referring to fig. 2 and 3, the surface of the battery sheet is provided with a plurality of first electrodes, and the dimension L of the bent section 121 of the conductive interconnection 12 is smaller than the interval d between the adjacent first electrodes in the direction C perpendicular to the extending direction B of the conductive interconnection 12.
Specifically, as shown in fig. 2 and 3, the surface of the battery sheet is provided with a plurality of first electrodes, and the distance between the first electrodes is not particularly limited. In the non-overlapping region, the projection of the first electrode coincides with the projection of the conductive interconnection 12. The distance between adjacent first electrodes is shown as d in fig. 3. In a direction C perpendicular to the extending direction B of the conductive interconnection 12, a dimension L of the bent section 121 of the conductive interconnection 12 is smaller than a spacing d between adjacent first electrodes. The size L of the bent segment 121 is smaller than the distance d between the adjacent first electrodes, and the bent segment 121 can be flatly placed between the adjacent first electrodes, so that the flatness of the overlapping region 113 of the adjacent battery pieces 11 can be ensured, and hidden cracks are reduced to a great extent.
Alternatively, referring to fig. 2, the dimension L of the bent section 121 of the conductive interconnection 12 is 5mm to 25mm in a direction C perpendicular to the extending direction B of the conductive interconnection 12.
Specifically, as shown in fig. 2, the dimension L of the bent section 121 of the conductive interconnection 12 is 5mm to 25mm in a direction C perpendicular to the extending direction B of the conductive interconnection 12. It will be appreciated that the conductive interconnect 12 is generally elongate and the conductive interconnect 12 extends along its length. When the size L of the bending section 121 is too short, the effect of reducing the hidden crack risk of the conductive interconnection 12 by increasing the contact area between the conductive interconnection 12 and the battery piece 11 cannot be achieved, however, when the size L of the bending section 121 is too long, the electrodes with opposite polarities may be conducted to cause short circuit, and the bending section 121 may protrude to cause the adjacent battery pieces 11 to be not overlapped smoothly. Therefore, when the size L of the bending section 121 is between 5mm and 25mm, the function of effectively reducing the hidden crack risk of the conductive interconnection piece 12 can be achieved, and the smooth lapping of the adjacent battery pieces 11 can be ensured.
Alternatively, referring to fig. 2, the cross-sectional shape of the conductive interconnection 12 is circular, rectangular or triangular on a plane perpendicular to the extending direction B of the conductive interconnection 12.
Specifically, the extending direction B of the conductive interconnection 12 is, as shown in fig. 2, a cross-sectional shape of the conductive interconnection 12 is circular, rectangular, or triangular on a plane perpendicular to the extending direction B of the conductive interconnection 12. The conductive interconnection piece 12 with the circular or triangular cross section can be stressed and extruded along the thickness direction of the battery piece 11 in the overlapping area, so that the contact area between the conductive interconnection piece 12 and the battery piece 11 can be increased, and the conductive interconnection piece 12 can not be extruded outside the overlapping area to improve the appearance quality of the stitch welding assembly 10. The conductive interconnection 12 having a rectangular cross-sectional shape can increase the size of the surface of the conductive interconnection 12 in contact with the battery cell 11 during the process of processing the conductive interconnection 12, and can increase the contact area of the conductive interconnection 12 and the battery cell in the overlapping region without pressing. Of course, the cross-sectional shape and size of the conductive interconnection 12 can be set by those skilled in the art according to practical situations, and the embodiment of the present invention is not limited thereto.
Alternatively, referring to fig. 3, the dimension h of the overlap area 113 is 1mm to 6mm in a direction parallel to the extending direction B of the conductive interconnection 12.
Specifically, as shown in fig. 3, the dimension h of the overlap region 113 is 1mm to 6mm in a direction parallel to the extending direction B of the conductive interconnection 12, that is, the width dimension h of the overlap region 113 is 1mm to 6 mm. It can be understood that the smaller the width dimension of the overlapping region 113 of the adjacent cell pieces 11, the larger the light-directing area of the cell pieces 11, the higher the power generation efficiency of the stitch-welded assembly 10, but the more likely the cell piece located below is to be unable to support the cell piece located above, resulting in the lower the connection strength of the adjacent cell pieces 11, the more likely the cell pieces 11 are damaged; conversely, the larger the width dimension of the overlapping region 113 of the adjacent cell pieces 11, the higher the bonding reliability of the adjacent cell pieces 11, but the smaller the area of the light-facing surface of the cell piece 11, the lower the power generation efficiency of the stitch-welded assembly 10. When the width dimension of the overlapping area is between 1mm and 6mm, the connection strength of the battery pieces 11 is ensured, and the power generation efficiency of the stitch-welded assembly 10 is also ensured.
Optionally, the light-facing surface 114 of the cell 11 is provided with a first electrode, the backlight surface is provided with a second electrode, and the conductive interconnection 12 is conductively connected with the first electrode of one cell 11 and the second electrode of an adjacent cell 11, wherein the polarities of the first electrode and the second electrode are opposite.
Specifically, as shown in fig. 1 or 3, the light-facing surface 114 of the left second cell 112 is provided with a first electrode, and the backlight surface of the second cell 112 is provided with a second electrode. The light-facing surface of the right first cell piece 111 is provided with a first electrode, the backlight surface of the first cell piece 111 is provided with a second electrode, and the conductive interconnection piece 12 is conductively connected with the first electrode of the left second cell piece 112 and the second electrode of the adjacent right first cell piece 111. Thus, the adjacent battery pieces 11 can be conducted, and current transmission can be realized between the adjacent battery pieces 11.
Optionally, the conductive interconnect 12 is a solder strip. Specifically, the conductive interconnection 12 is a solder strip, and the solder strip is conductively connected to the electrode of the battery cell 11 by welding. The embodiment of the utility model provides an in, weld the area in the overlap region 113 of adjacent battery piece 11 and between the battery piece 11 line contact, can increase the area of contact who welds area and battery piece 11 for it is even to weld the area atress in overlap region 113. Thus, the risk of the solder strip developing a latent crack in the overlap region 113 can be reduced, and the service life of the stitch welded assembly can also be extended.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (8)
1. A stitch-welded assembly, comprising overlapping battery pieces;
the adjacent battery pieces are in conductive connection through the conductive interconnection piece, wherein the conductive interconnection piece is provided with a bent section in an overlapping area of the adjacent battery pieces, and the bent section in the conductive interconnection piece is in contact with the battery pieces.
2. Stitch welding assembly according to claim 1,
and on the surface parallel to the light-facing surface of the battery piece, the projection of the bent section of the conductive interconnection piece is U-shaped or zigzag.
3. Stitch welding assembly according to claim 1,
the surface of the battery piece is provided with a plurality of first electrodes, and in the direction perpendicular to the extending direction of the conductive interconnection piece, the size of the bending section of the conductive interconnection piece is smaller than the distance between the adjacent first electrodes.
4. Stitch welding assembly according to claim 3,
the conductive interconnection has a bent section with a size of 5mm to 25mm in a direction perpendicular to an extending direction of the conductive interconnection.
5. Stitch welding assembly according to claim 1,
the conductive interconnection has a cross-sectional shape of a circle, a rectangle, or a triangle on a plane perpendicular to an extending direction of the conductive interconnection.
6. Stitch welding assembly according to claim 1,
the size of the overlapping area is 1mm-6mm in a direction parallel to the extending direction of the conductive interconnection.
7. Stitch welding assembly according to claim 1,
a first electrode is arranged on the light facing surface of the battery piece, and a second electrode is arranged on the backlight surface;
the conductive interconnection piece is conductively connected with a first electrode of one cell piece and a second electrode of an adjacent cell piece, wherein the first electrode and the second electrode are opposite in polarity.
8. Stitch welding assembly according to claim 1,
the conductive interconnects are solder strips.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021615434.XU CN212695159U (en) | 2020-08-05 | 2020-08-05 | Stitch welding assembly |
| PCT/CN2020/128404 WO2022027854A1 (en) | 2020-08-05 | 2020-11-12 | Stacked assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021615434.XU CN212695159U (en) | 2020-08-05 | 2020-08-05 | Stitch welding assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212695159U true CN212695159U (en) | 2021-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021615434.XU Active CN212695159U (en) | 2020-08-05 | 2020-08-05 | Stitch welding assembly |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN212695159U (en) |
| WO (1) | WO2022027854A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102544155A (en) * | 2012-01-06 | 2012-07-04 | 南通美能得太阳能电力科技有限公司 | Solar cell assembly and manufacturing method thereof |
| JP6646149B2 (en) * | 2016-06-28 | 2020-02-14 | 京セラ株式会社 | Solar cell module |
| CN108598204B (en) * | 2018-04-19 | 2020-04-28 | 黄山富乐新能源科技有限公司 | Photovoltaic module and preparation process thereof |
| CN110634978A (en) * | 2018-06-06 | 2019-12-31 | 君泰创新（北京）科技有限公司 | Double-sided power generation solar cell module and preparation method thereof |
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2020
- 2020-08-05 CN CN202021615434.XU patent/CN212695159U/en active Active
- 2020-11-12 WO PCT/CN2020/128404 patent/WO2022027854A1/en active Application Filing
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| Publication number | Publication date |
|---|---|
| WO2022027854A1 (en) | 2022-02-10 |
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