CN209766437U - Photovoltaic cell string and photovoltaic cell assembly - Google Patents
Photovoltaic cell string and photovoltaic cell assembly Download PDFInfo
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- CN209766437U CN209766437U CN201920529943.1U CN201920529943U CN209766437U CN 209766437 U CN209766437 U CN 209766437U CN 201920529943 U CN201920529943 U CN 201920529943U CN 209766437 U CN209766437 U CN 209766437U
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- cell
- grid line
- main grid
- photovoltaic cell
- battery
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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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Abstract
the utility model provides a photovoltaic cell cluster and photovoltaic cell subassembly, the photovoltaic cell cluster includes: the front side of each battery piece is provided with a front main grid line, the back side of each battery piece is provided with a back main grid line, the edges of the two adjacent battery pieces are connected in a shingled mode, the front main grid line of one battery piece of the two adjacent battery pieces is connected with the back main grid line of the other battery piece through a welding strip, and at least one side of the welding strip is located at the overlapping position of the two adjacent battery pieces and is provided with a supporting part. According to the utility model discloses a photovoltaic cell cluster, the edge of two adjacent battery pieces is the shingled joint, and the positive main grid line of a battery piece is connected through welding the area with the back main grid line of another battery piece in two adjacent battery pieces, is equipped with the area of contact that the supporting part can increase coincide department through the coincide department that is located at two adjacent battery pieces and welds at least one side in area, reduces contact stress, reduces the breakage of battery cluster in lamination or handling, improves the reliability of battery cluster.
Description
Technical Field
The utility model relates to a photovoltaic field of making, in particular to photovoltaic cell cluster and photovoltaic cell subassembly.
Background
In the solar cell industry, a laminated assembly is a common assembly, the arrangement density of cells in the laminated assembly is high, the power of the laminated assembly is high, but the existing laminated assembly is connected through conductive adhesive or a welding strip, the overlapping areas of the cells are not in complete contact, the contact surface is small, the problem of high contact stress exists, and a cell string is easy to break in the laminating or carrying process, so that the reliability of the cell string is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a photovoltaic cell cluster and photovoltaic cell subassembly for it is big to solve in the battery cluster battery piece overlap region contact stress, and the battery cluster is easy breakable in lamination or handling, problem that the reliability is low.
In order to solve the technical problem, the utility model discloses a following technical scheme:
According to the utility model discloses photovoltaic cell cluster of first aspect embodiment, include:
The front side of each battery piece is provided with a front main grid line, the back side of each battery piece is provided with a back main grid line, the edges of the adjacent battery pieces are connected in a laminated manner, the edges of the adjacent battery pieces are adjacent to each other, one of the adjacent battery pieces is connected with the other battery piece through a welding strip, and the overlapped part of the adjacent battery pieces is located on at least one side of the welding strip.
Furthermore, welding pads are respectively arranged on the front main grid line of each battery piece and the back main grid line of each battery piece, and the welding pad on the front main grid line of one battery piece and the welding pad on the back main grid line of the other battery piece in two adjacent battery pieces are respectively connected with the corresponding welding strip.
Furthermore, the bonding pads on each battery piece comprise a plurality of columns, each column comprises a plurality of bonding pads, the bonding pads are distributed at intervals along the length direction of the solder strip, and the bonding pads in each column are respectively connected with the corresponding solder strip.
Furthermore, the two sides of each welding strip are respectively provided with the supporting parts.
Furthermore, two sides of each welding strip respectively stop against two adjacent supporting parts.
Further, the supporting part is a colloid layer.
Further, the colloid layer is a non-conductive layer.
Further, the colloid layer is an elastic layer.
Further, the colloid layer is an organic silicon layer, an epoxy resin layer or an acrylic acid glue layer.
According to the utility model discloses photovoltaic cell subassembly of second aspect embodiment, including the photovoltaic cell cluster of above-mentioned embodiment.
The above technical scheme of the utility model following beneficial effect has at least:
According to the utility model discloses a photovoltaic cell cluster, the edge of two adjacent battery pieces is the shingled joint, and the positive main grid line of a battery piece is connected through welding the area with the back main grid line of another battery piece in two adjacent battery pieces, is equipped with the area of contact that the supporting part can increase coincide department through the coincide department that is located at two adjacent battery pieces and welds at least one side in area, reduces contact stress, reduces the breakage of battery cluster in lamination or handling, improves the reliability of battery cluster.
Drawings
Fig. 1 is a schematic diagram of a support portion on a cell sheet in a photovoltaic cell string according to an embodiment of the present invention;
Fig. 2 is a schematic view illustrating the cooperation between the support portion and the solder strip in the photovoltaic cell string according to the embodiment of the present invention;
Fig. 3 is a schematic structural diagram of a photovoltaic cell string according to an embodiment of the present invention;
Fig. 4 is a side view of a photovoltaic cell string in accordance with an embodiment of the present invention.
Reference numerals:
a battery piece 10;
A solder strip 20;
A support portion 30;
And a bonding pad 40.
Detailed Description
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention.
The following first describes a photovoltaic cell string according to an embodiment of the present invention in detail with reference to the drawings.
As shown in fig. 1 to 4, according to the utility model discloses photovoltaic cell cluster includes a plurality of battery pieces 10, and the front of every battery piece 10 is equipped with the front main grid line and the back is equipped with the back main grid line, and the edge of two adjacent battery pieces 10 is the connection of shingle formula, and the front main grid line of one battery piece 10 in two adjacent battery pieces 10 is connected through welding the area 20 with the back main grid line of another battery piece 10, is located at least one side of welding the area 20 and is equipped with supporting part 30 at the coincide department of two adjacent battery pieces 10.
That is to say, the photovoltaic cell string mainly comprises a plurality of battery pieces 10, wherein the battery pieces can be obtained by cutting large battery pieces, 1/5 or 1/6 of the large battery pieces can be cut to serve as the battery pieces 10, the front side of each battery piece 10 is provided with a front main grid line, the back side of each battery piece 10 is provided with a back main grid line, the edges of two adjacent battery pieces 10 are connected in a shingled manner, the front main grid line of one battery piece 10 of two adjacent battery pieces 10 can be connected with the back main grid line of the other battery piece 10 through a solder strip 20, current can be collected through the solder strip 20, the solder strip 20 can be a circular solder strip, a triangular solder strip, a flat solder strip or a special-shaped solder strip, and the two battery pieces 20 are connected together through the solder strip 20, so that stable and firm connection can be ensured.
At least one side of the welding strip 20 at the overlapping position of two adjacent battery pieces 10 can be provided with a supporting portion 30, the supporting portion 30 is located at the overlapping area between two adjacent battery pieces 10, the supporting portion 30 can extend out of the overlapping area in the length direction of the welding strip and can also be smaller than the overlapping area, the supporting portion 30 can be arranged at one side of the welding strip 20, and the supporting portions 30 can also be arranged at two sides of the welding strip 20. That is, the supporting portion 30 may be disposed at a position where the solder strip 20 is not disposed at the overlapping position of two adjacent battery pieces 10, the supporting portion 30 respectively stops the overlapping position of the two battery pieces 10, when the supporting portion 30 is not disposed, only the solder strip is in position contact at the overlapping position of the two battery pieces 10, after the supporting portion 30 is disposed, the supporting portion is in position contact at the overlapping position of the two battery pieces 10, the overlapping position of the two battery pieces can be changed from line contact to surface contact, the contact area at the overlapping position of the two battery pieces 10 is increased by the supporting portion 30, the contact stress is reduced, the breakage of the battery string in the laminating or conveying process is reduced, the repair of the photovoltaic battery string is reduced, and the reliability of the battery string is improved. Additionally, the utility model discloses a photovoltaic cell cluster is compatible big with current series welding equipment when the equipment, does not need big investment.
In some embodiments of the present invention, as shown in fig. 1 to fig. 3, the bonding pads 20 may be respectively disposed on the front main grid line of the battery piece 10 and the back main grid line of the battery piece 10, the bonding pads 20 on the front main grid line of one battery piece 10 and the bonding pads 20 on the back main grid line of another battery piece 10 in two adjacent battery pieces 10 may be respectively connected to the corresponding welding strips 20, and the bonding pads 20 are disposed on the main grid line of the battery piece 10 to facilitate the connection of the welding strips.
In other embodiments of the present invention, as shown in fig. 1 to fig. 3, the pads 40 on each battery piece 10 may include multiple columns, each column may include multiple pads 40 and the multiple pads 40 may be spaced apart along the length direction of the solder strip 20, each column of pads 40 is connected to the corresponding solder strip 20, each column of pads 40 corresponds to one solder strip 20, which facilitates the connection of the solder strips and improves the stability and firmness of the solder strip connection.
According to some embodiments of the present invention, as shown in fig. 2 and 3, the two sides of each welding strip 20 may be respectively provided with a supporting portion 30, so as to increase the contact area of the overlapped position of the battery pieces 10, reduce the contact stress, and reduce the breakage of the battery string during the lamination or transportation process.
Preferably, both sides of each solder strip 20 can respectively abut against two adjacent supporting portions 30, so as to increase the contact area of the overlapping position of the battery piece 10, and the joint of the solder strip 20 and the two adjacent supporting portions 20 can enable the entire overlapping position to be in a contact state, thereby preventing the battery piece from being broken due to excessive local stress.
In some embodiments of the present invention, the supporting portion 30 may be a gel layer, the gel layer may be formed on the battery plate by screen printing or dispensing, and the shape of the gel layer may be rectangular, oval or circular. Alternatively, the colloidal layer may be a silicone layer, an epoxy layer, or an acrylic glue layer, and may also be another resin layer or rubber layer. Preferably, the colloid layer can be an elastic layer, and the impact or the extrusion of the lamination position of the battery piece can be buffered through the elastic layer, so that the contact stress is reduced, and the breakage of the battery piece is reduced.
When the supporting portion 30 is a colloid layer, in the process of assembling the photovoltaic cell string, colloid can be coated at the corresponding position of the edge of the cell 10 to form the colloid layer, the colloid layer can have elasticity and toughness, and stress generated by hard contact between the laminated welding strip 20 and the edge of the cell 10 can be decomposed, so that the overlapped position is converted from line contact to surface contact, and the breakage of the cell can be reduced; and then the welding strip 20 and the battery piece 10 are welded in series, the coated colloid can be pre-cured, then the components are laminated, the coated colloid can be directly laminated without pre-curing, the colloid curing is realized in the lamination process, and the specific process can be determined according to the curing property of the colloid. The interval position that the welding belt passes through can be reserved when the colloid is paintd at the edge of battery piece 10, then can carry out the precuring to the colloid, and the colloid is after the precuring, and battery piece 10 can be piled up together and deposit, can directly place in stringer's magazine after accomodating, and current stringer need not do any change, and the colloid also can realize secondary cure at the lamination in-process, realizes the bonding to battery piece 10 overlap region.
In other embodiments of the utility model, the colloid layer can be the non-conducting layer, and the colloid layer does not have the electric conductivity, need not use the colloid that contains silver particle, and is with low costs, even the colloid appears overflowing when forming the colloid layer, also does not have the short circuit problem, improves the reliability of battery cluster.
The utility model also provides a photovoltaic cell assembly, including the photovoltaic cell cluster in the above-mentioned embodiment, the photovoltaic cell assembly who has the photovoltaic cell cluster in the above-mentioned embodiment can reduce the contact stress of coincide position, reduces the breakage of battery piece, improves the reliability of subassembly.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. a photovoltaic cell string, comprising:
The solar cell comprises a plurality of cell pieces (10), wherein a front main grid line is arranged on the front side of each cell piece (10), a back main grid line is arranged on the back side of each cell piece (10), every two adjacent cell pieces are connected in a imbricated mode at the edge of each cell piece (10), one of the cell pieces (10) is connected with the other main grid line on the front side of each cell piece (10) through a welding strip (20), the superposition positions of the cell pieces (10) are located, and a supporting portion (30) is arranged on at least one side of each welding strip (20).
2. The photovoltaic cell string according to claim 1, wherein the front main grid line of the cell (10) and the back main grid line of the cell (10) are respectively provided with a pad (40), and the pad (40) on the front main grid line of one cell (10) and the pad (40) on the back main grid line of the other cell (10) in two adjacent cells (10) are respectively connected with the corresponding solder strip (20).
3. The photovoltaic cell string according to claim 2, wherein the bonding pads (40) on each cell piece (10) comprise a plurality of columns, each column comprises a plurality of bonding pads (40) and the bonding pads (40) are distributed at intervals along the length direction of the solder strip (20), and each column of the bonding pads (40) is respectively connected with the corresponding solder strip (20).
4. The string according to claim 1, wherein each of the solder ribbons (20) is provided with the support portion (30) on both sides thereof.
5. the string according to claim 4, characterized in that each solder ribbon (20) stops on its two sides against the two supports (30) adjacent to it, respectively.
6. The string according to claim 1, wherein the support (30) is a gel layer.
7. The string of photovoltaic cells of claim 6, wherein the colloidal layer is a non-conductive layer.
8. The string of photovoltaic cells of claim 6, wherein the colloidal layer is an elastomeric layer.
9. the photovoltaic cell string according to claim 6, wherein the colloidal layer is an organic silicon layer, an epoxy layer, or an acrylic glue layer.
10. A photovoltaic cell assembly comprising the string of photovoltaic cells of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920529943.1U CN209766437U (en) | 2019-04-18 | 2019-04-18 | Photovoltaic cell string and photovoltaic cell assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920529943.1U CN209766437U (en) | 2019-04-18 | 2019-04-18 | Photovoltaic cell string and photovoltaic cell assembly |
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| Publication Number | Publication Date |
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| CN209766437U true CN209766437U (en) | 2019-12-10 |
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| CN201920529943.1U Active CN209766437U (en) | 2019-04-18 | 2019-04-18 | Photovoltaic cell string and photovoltaic cell assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109994556A (en) * | 2019-04-18 | 2019-07-09 | 上海晶澳太阳能科技有限公司 | A kind of photovoltaic cell string and photovoltaic cell component |
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2019
- 2019-04-18 CN CN201920529943.1U patent/CN209766437U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109994556A (en) * | 2019-04-18 | 2019-07-09 | 上海晶澳太阳能科技有限公司 | A kind of photovoltaic cell string and photovoltaic cell component |
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