CN203950824U - Solar module - Google Patents

Solar module Download PDF

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Publication number
CN203950824U
CN203950824U CN201420321845.6U CN201420321845U CN203950824U CN 203950824 U CN203950824 U CN 203950824U CN 201420321845 U CN201420321845 U CN 201420321845U CN 203950824 U CN203950824 U CN 203950824U
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CN
China
Prior art keywords
welding
cell piece
solar module
bilge
cell
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Active
Application number
CN201420321845.6U
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Chinese (zh)
Inventor
杨亮亮
刘德志
沈坚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canadian Solar Inc
Canadian Solar Manufacturing Changshu Inc
Original Assignee
Canadian Solar Manufacturing Changshu Inc
Canadian Solar China Investment Co Ltd
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Publication date
Application filed by Canadian Solar Manufacturing Changshu Inc, Canadian Solar China Investment Co Ltd filed Critical Canadian Solar Manufacturing Changshu Inc
Priority to CN201420321845.6U priority Critical patent/CN203950824U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

The utility model discloses a kind of solar module, the welding that it comprises some cell pieces and is electrically connected described cell piece.Described cell piece is provided with electrode some and welding welding.Described welding is provided with some and described electrode weld part one to one.Described welding is provided with the turn of bilge that pre-folds between adjacent two weld parts.The welding of the utility model solar module is provided with and pre-folds turn of bilge, can reduce the internal stresses release in lamination process, thereby can reduce the impact bringing due to angularity, such as sliver, solder joint rosin joint, sealing-off etc.

Description

Solar module
Technical field
The utility model relates to a kind of solar module, relates in particular to a kind of lamination type solar module.
Background technology
Along with the Cost Competition of solar module grows in intensity, as the cell piece transformation efficiency of one of raw material, also do higher and higher, but in order further to reduce costs, the thickness of the silicon chip of cell piece is done thinner and thinner; Meanwhile, the main grid line of cell piece is done more and more, and as four present grid lines, five grid lines etc., in order to improve the power of battery component, the welding copper base material thickness that welding of battery film is used constantly thickens.In addition, the cell piece of most of metal piercing coiling (metallization wrap-through, MWT) technology, solder joint is arranged on the same face of cell piece and is spot welding, use straight welding welding, welding difficulty is large and cell piece warpage is large, and welding stress is large.
Current existing way is with straight welding, directly to connect between two cell pieces; But, along with cell piece thickness reduces, welding thickness increases, directly cause thus battery component in lamination stages the factors such as internal stress due to weld, the contact site branch imposed deformation that causes cell piece edge and welding, and because silicon chip is the factors such as fragile material, thereby more easily cause cell piece sliver, and then battery component fraction defective is improved.
The connected mode of conventional batteries sheet, because welding and when series connection, cell piece front and back welding connects, and the angularity of cell piece is changed before and after welding and little.
The connected mode of MWT cell piece, because electrode all overleaf, front there is no welding and connects, so after monolithic welding, cell piece is due to exist (also can be regarded as welding stress and all concentrated on back electrode face) of welding stress, it is large that angularity becomes, in lamination process, being forced to property of cell piece warpage flattens, internal stresses release, the easy rosin joint of pad, sealing-off.If welding pulling force excessive (pad and welding adhesion are large), the just easy sliver of cell piece.
In addition, on November 6th, 2013, the Chinese utility model patent of bulletin disclosed a kind of solar module welding No. CN203277454, and it comprises the first welding portion, and described the first welding portion is provided with n arc convex portion.The length that compensation welding shrinks plays in described arc convex portion, reduces because of the stress of generation that expands with heat and contract with cold, but does not change the impact bringing due to angularity, such as sliver, solder joint rosin joint, sealing-off etc. are bad.
Therefore, be necessary to provide a kind of improved solar module to address the above problem.
Utility model content
The purpose of this utility model is to provide a kind of solar module, and this solar module can reduce the impact bringing due to angularity, such as sliver, solder joint rosin joint, sealing-off etc. are bad.
For realizing above utility model object, the utility model adopts following technical scheme: a kind of solar module, comprise some cell pieces and be electrically connected the welding of described cell piece, described cell piece is provided with electrode some and welding welding, described welding is provided with some and described electrode weld part one to one, and described welding is provided with the turn of bilge that pre-folds between adjacent two weld parts.
As further improvement of the utility model, described cell piece comprises the back side of positive and setting contrary to the positive, described electrode comprises the negative pole that is arranged on positive positive pole and is arranged on the back side, described in pre-fold turn of bilge and be arranged on described welding and connect between the positive pole of adjacent two cell pieces and the weld part of negative pole.
As further improvement of the utility model, described in pre-fold turn of bilge bending point be arranged on the edge of adjacent two described cell pieces.
As further improvement of the utility model, described in pre-fold turn of bilge bending point be arranged between adjacent two described cell pieces.
As further improvement of the utility model, the pad of described cell piece is positioned on the same face of cell piece, described electrode comprises positive pole and negative pole, described welding comprise with cell piece on positive pole welding the first welding and with cell piece on the second welding of negative pole welding, the first welding electric connection on described the second welding and another cell piece.
As further improvement of the utility model, described the first welding comprises that bending extends to the connecting portion of an end of aforementioned the second welding, another end of described the second welding extends beyond cell piece and forms extension, and the connecting portion welding on described extension and another cell piece realizes the electric connection between aforementioned two cell pieces.
As further improvement of the utility model, described cell piece comprises the insulation strip being arranged between the second welding and cell piece.
As further improvement of the utility model, described in to pre-fold turn of bilge curved.
Compared to prior art, the welding of the utility model solar module is provided with and pre-folds turn of bilge, can reduce the internal stresses release in lamination process, thereby can reduce the impact bringing due to angularity, such as sliver, solder joint rosin joint, sealing-off etc.
Accompanying drawing explanation
Fig. 1 is the vertical view that the utility model solar module adopts conventional batteries sheet to connect.
Fig. 2 is the cutaway view of the adjacent cell sheet of the solar module shown in Fig. 1, and the turn of bilge that pre-folds of welding is wherein first kind of way.
Fig. 3 is the cutaway view of the adjacent cell sheet of the solar module shown in Fig. 1, and the turn of bilge that pre-folds of welding is wherein the second way.
Fig. 4 is the cutaway view of the adjacent cell sheet of the solar module shown in Fig. 1, and the turn of bilge that pre-folds of welding is wherein the third mode.
Fig. 5 is the vertical view of MWT cell piece.
Fig. 6 is the vertical view that adopts the good welding of MWT welding of battery film shown in Fig. 5.
Fig. 7 is two vertical views that the MWT cell piece shown in Fig. 6 welds by welding.
Fig. 8 is the end view for the welding of the MWT cell piece shown in Fig. 5.
Fig. 9 is the vertical view of the welding shown in Fig. 8.
Figure 10 is the end view of the good welding of the welding of battery film of MWT shown in Fig. 6.
Embodiment
Be the schematic diagram that the utility model solar module 1 adopts conventional batteries sheet 11 to connect as Figure 1-4, described solar module 1 comprises the described cell piece 11 that some horizontal intervals arrange and is electrically connected the welding 12 of described cell piece 11.On described each cell piece 11, be equipped with the electrode 110 with welding 12 welding.Described welding 12 comprises the weld part 120 with corresponding electrode 110 welding.Described welding 12 is provided with and pre-folds turn of bilge 121 to be reduced in the internal stresses release in lamination process.The material of described cell piece 11 is silicon.Described cell piece 11 is connected in series by welding 12.
Described cell piece 11 comprise positive 111 and with the back side 112 of positive 111 contrary setting, on described cell piece 11, be positioned at positive electrode 110 for positive pole, the electrode 110 that is positioned at the back side 112 on described cell piece 11 is negative pole.A weld part 120 on described welding 12 and the polarity on a cell piece 11 are anodal electrode 110 welding, electrode 110 welding that on another weld part 120 on described welding 12 and another adjacent cell piece 11, polarity is negative pole.Described welding 12 is connected to the back side 112 of another adjacent cell piece 11 from the front 111 of a cell piece 11, the described turn of bilge 121 that pre-folds is arranged on described welding 12 and connects between the positive pole 110 of adjacent two cell pieces 11 and the weld part 120 of negative pole 110, is specially between two adjacent cell pieces 11.
As shown in Figure 2, the turn of bilge 121 that pre-folds of described welding 12 is first kind of way, described in pre-fold turn of bilge 121 bending point be separately positioned on the edge of adjacent two cell pieces 11, and the part between bending point is to be oblique line shape to extend.
As shown in Figure 3, the turn of bilge 121 that pre-folds of described welding 12 is second way, described in pre-fold turn of bilge 121 bending point be arranged between adjacent two cell pieces 11, and the part between bending point is arcuation transition and extends between adjacent two cell pieces 11.
As shown in Figure 4, the turn of bilge 121 that pre-folds of described welding 12 is the third modes, described welding 12 is first linearly extends cell piece 11, and then is polyline shaped bending and pre-folds turn of bilge 121 described in extending to form, and pre-folds described between two cell pieces 11 of bending point setting of turn of bilge 121.
Conventional batteries sheet 11 is because when welding and series connection, the front 111 of cell piece 11 and the back side 112 have welding 12 to connect, angularity changes and is little before and after welding, simultaneously, the utility model pre-folds turn of bilge 121 described in arranging by welding 12 parts between two cell pieces 11, can avoid or reduce sliver risk.
As shown in Figure 5-10, the cell piece 21 of described solar module 2 is MWT type cell piece 21.Some electrodes 210 of described cell piece 21 are positioned on the same face of cell piece 21.Described electrode 210 comprise some positive poles and with the spaced some negative poles of positive pole.Described welding 22 comprise with cell piece 21 on polarity be the first welding 220 of anodal electrode 210 welding, and with the second welding 221 of polarity on cell piece 21 210 welding of electrode that are negative pole, described the second welding 221 is electrically connected with the first welding 220 on another cell piece 21.Described the first welding 220 comprises that bending extends to the connecting portion 2201 of an end of aforementioned the second welding 221.Another end of described the second welding 221 extends beyond cell piece 21 and forms extension 2210, and connecting portion 2201 welding on described extension 2210 and another cell piece 21 realize the electric connection between aforementioned two cell pieces 21.Cell piece 21 comprises the insulation strip 23 being arranged between the second welding 221 and cell piece 21, for isolated the second welding 221 and cell piece 21, prevents short circuit.It is the electrode 210 that anodal electrode 210 and a plurality of polarity are negative pole that described cell piece 21 is provided with a plurality of polarity, and described welding 22 is provided with a plurality of weld parts 240 and corresponding electrode 210 welding.Described welding 22 comprise connect adjacent weld part 240 pre-fold turn of bilge 241, described in pre-fold turn of bilge 241 and be spaced a distance with cell piece 21.It is described that to pre-fold turn of bilge 241 curved.
Because of electrode 210 all overleaf, front there is no welding 22 and connects described MWT type cell piece 21, so after monolithic welding, cell piece 21 is due to exist (also can be regarded as welding stress and all concentrated on back electrode face) of welding stress, it is large that angularity becomes.Described in being provided with, pre-fold turn of bilge 241 on welding 22, in lamination process, the warpage of cell piece 21 is eliminated, discharge internal stress, welding 22 sweeps, pre-fold turn of bilge 241 pressurizeds (after pressurized, bending welding 22 has a stretching process, can make each solder joint relative position fix), offset or absorbed because cell piece 21 warpages are eliminated the Stress Release of bringing, reducing sliver.
Compared to prior art, the welding 12,22 of the utility model solar module 1,2 is provided with and pre-folds turn of bilge 121,241, can reduce the internal stresses release in lamination process, thereby can reduce the impact bringing due to angularity, such as sliver, solder joint rosin joint, sealing-off etc.
In sum, these are only preferred embodiment of the present utility model, should not limit scope of the present utility model with this, be that every simple equivalence of doing according to the utility model claims and utility model description changes and modifies, all should still belong in the scope that the utility model patent contains.

Claims (8)

1. a solar module, comprise some cell pieces and be electrically connected the welding of described cell piece, described cell piece is provided with electrode some and welding welding, described welding is provided with some and described electrode weld part one to one, it is characterized in that: described welding is provided with the turn of bilge that pre-folds between adjacent two weld parts.
2. solar module as claimed in claim 1, it is characterized in that: described cell piece comprises the back side of positive and setting contrary to the positive, described electrode comprises the negative pole that is arranged on positive positive pole and is arranged on the back side, described in pre-fold turn of bilge and be arranged on described welding and connect between the positive pole of adjacent two cell pieces and the weld part of negative pole.
3. solar module according to claim 2, is characterized in that: described in pre-fold turn of bilge bending point be arranged on the edge of adjacent two described cell pieces.
4. solar module according to claim 2, is characterized in that: described in pre-fold turn of bilge bending point be arranged between adjacent two described cell pieces.
5. solar module as claimed in claim 1, it is characterized in that: the electrode of described cell piece is positioned on the same face of cell piece, described electrode comprises positive pole and negative pole, described welding comprise with cell piece on positive pole welding the first welding and with cell piece on the second welding of negative pole welding, the first welding electric connection on described the second welding and another cell piece.
6. solar module as claimed in claim 5, it is characterized in that: described the first welding comprises that bending extends to the connecting portion of an end of aforementioned the second welding, another end of described the second welding extends beyond cell piece and forms extension, and the connecting portion welding on described extension and another cell piece realizes the electric connection between aforementioned two cell pieces.
7. solar module as claimed in claim 5, is characterized in that: described cell piece comprises the insulation strip being arranged between the second welding and cell piece.
8. solar module as claimed in claim 1, is characterized in that: described in to pre-fold turn of bilge curved.
CN201420321845.6U 2014-06-17 2014-06-17 Solar module Active CN203950824U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420321845.6U CN203950824U (en) 2014-06-17 2014-06-17 Solar module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420321845.6U CN203950824U (en) 2014-06-17 2014-06-17 Solar module

Publications (1)

Publication Number Publication Date
CN203950824U true CN203950824U (en) 2014-11-19

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109425449A (en) * 2017-09-04 2019-03-05 北京清正泰科技术有限公司 A kind of unstressed flexible electrode of graphene sensor
CN113314637A (en) * 2021-05-28 2021-08-27 宁夏小牛自动化设备有限公司 Preparation method of single-side welded dense-grid solar cell string

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109425449A (en) * 2017-09-04 2019-03-05 北京清正泰科技术有限公司 A kind of unstressed flexible electrode of graphene sensor
CN113314637A (en) * 2021-05-28 2021-08-27 宁夏小牛自动化设备有限公司 Preparation method of single-side welded dense-grid solar cell string

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CP01 Change in the name or title of a patent holder

Address after: 215300 Suzhou high tech Zone, Jiangsu, Lu Shan Road, No. 199

Co-patentee after: Changshu Canadian Solar Inc.

Patentee after: Artes sunshine Power Group Co. Ltd.

Address before: 215300 Suzhou high tech Zone, Jiangsu, Lu Shan Road, No. 199

Co-patentee before: Changshu Canadian Solar Inc.

Patentee before: Canadian (China) Investment Co., Ltd.

CP01 Change in the name or title of a patent holder
CP03 Change of name, title or address

Address after: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province

Patentee after: Atlas sunshine Power Group Co.,Ltd.

Patentee after: Changshu Artes Sunshine Power Technology Co.,Ltd.

Address before: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province

Patentee before: CSI SOLAR POWER GROUP Co.,Ltd.

Patentee before: Changshu Artes Sunshine Power Technology Co.,Ltd.

CP03 Change of name, title or address