CN202585428U - Low-resistance serial welding structure for solar cell component - Google Patents
Low-resistance serial welding structure for solar cell component Download PDFInfo
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- CN202585428U CN202585428U CN 201120536144 CN201120536144U CN202585428U CN 202585428 U CN202585428 U CN 202585428U CN 201120536144 CN201120536144 CN 201120536144 CN 201120536144 U CN201120536144 U CN 201120536144U CN 202585428 U CN202585428 U CN 202585428U
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Abstract
The utility model discloses a low-resistance serial welding structure for a solar cell component. The welding structure comprises a first cell and a second cell adjacent to each other, wherein the length of one ends, extending out of a corresponding side of a cell silicon wafer, of the negative and positive electrodes of the cells is 6/10a-9/10a; the other ends of the negative and positive electrodes of the cells are recessed in the cell silicon wafer for 0.5-3mm; and the negative electrode of the first cell is overlapped and integrally welded with the positive electrode of the second cell. Because an electrode connecting structure between cells is changed, shrinkage at the connecting part of the two cells is the thickness of the cell silicon wafer only, the shrinkage at the connecting part of the two cells is reduced, the pressure of a metal solder strip silicon wafer is greatly reduced, and the cell silicon wafer can be effectively prevented from being crushed; and meanwhile, the resistance at the connecting part is reduced by half, the power output of the cell component is improved, and the defect of short circuit of the cell component caused by softening of the heated metal solder strip is overcome. The distance between the cells can be reduced by 20-30%, the effective day-lighting area of the solar cell component is improved, and the structure is beneficial to the improvement on the output power.
Description
Technical field:
The connected mode of battery sheet related in particular to the series connection Welding Structure between the battery sheet in the solar module when the utility model related to solar module production.
Background technology:
The output voltage of monomer solar cell, electric current and power are all very little, and in general, output voltage has only about 0.5V, and power output has only 1～4W, can not satisfy the requirement as application of power.For improving power output, need a plurality of cells are rationally coupled together, and be packaged into assembly.In the more powerful occasion of needs, then need a plurality of assemblies be connected to become square formation, so that the bigger electric current of numerical value, voltage output to be provided to load.
Solar battery sheet requires its area bigger owing to its absorbing light produces the particularity of electric current, and it is shaped to laminar; Daylighting face is a negative pole, and shady face is anodal, and the mode that the cell sheet is coupled together is identical with the conventional accumulators principle; Need battery sheet both positive and negative polarity is joined end to end, therefore we adopt metal welding one end to be welded on the positive pole of battery sheet when producing, and the other end is welded on the negative pole of battery sheet; In this way the battery sheet is connected in series, improves power output.Routine techniques according to battery component can be known, improve the power output of battery component, in the sizing solar module, just must increase effective illuminating area of battery sheet, also just must dwindle the spacing distance between the battery sheet; In order further to reduce cost, must reduce the thickness of battery sheet, but the too thin very easy fragmentation of battery sheet, increased when lamination, the crush probability of battery sheet of metal welding.
The metal welding syndeton between adjacent two battery sheets is as shown in Figure 1 in the solar module at present; Every battery sheet is all by negative electrode 1; Cell silicon chip 2 is formed with positive electrode 3; Electrode annexation between adjacent two battery sheets is: the positive electrode 3 on the negative electrode 1 on first battery sheet and the second battery sheet is same metal welding, and this single piece of metal welding syndeton exists two aspect defectives, first; The metal welding increases the rim pressure of battery sheet during lamination, has increased the breakage rate of battery sheet.The second, battery component can be sagging after the metal welding is heated in when work, makes the metal welding contact with the end face of battery sheet and form short circuit, directly influences the normal output of entire cell assembly.The 3rd, according to resistance formula R=ρ I/S, the metal welding tape thickness is bigger, cross-sectional area (S) is big more, and then resistance (R) is more little, and existing single piece of metal welding connected mode makes that the connection resistance of battery sheet is bigger than normal, is unfavorable for the output of solar module power.The 4th, when battery lamella press seal is adorned, at two battery sheet joining places; Under the vacuum compression effect; The amount of contraction here is the thickness sum of a cell silicon chip thickness and a metal welding, and so big compress variation increases the cell silicon chip of crushing easily to the pressure of the cell silicon chip in the battery sheet.
Because the thickness of battery sheet and the thickness of metal welding all exert an influence to the output of solar components; Therefore be necessary to design a kind of solar components battery low resistance series welding access node structure; To improve the power output of solar module; Prevent cell silicon chip crushing, reduce the connection electricity connecting resistance of battery sheet, stop the battery component circuit defect that is heated and causes after softening because of the metal welding.
The utility model content:
The purpose of the utility model is provides a kind of solar components battery low resistance series welding access node structure; Can reduce the pressure that cell silicon chip is produced by the bending of metal welding through this welding manner; Prevent the cell silicon chip crushing; Reduce the connection electricity connecting resistance of battery sheet, stop the battery component circuit defect that is heated and causes after softening because of the metal welding, to increase the power output of solar components.
The technical scheme that the utility model adopted is:
A kind of solar components battery low resistance series welding access node structure comprises the A-battery sheet and the B battery sheet of adjacent spaces, wherein; The A-battery sheet is identical with the B battery chip architecture; Form by negative electrode, cell silicon chip and positive electrode, negative electrode and positive electrode are separately positioned on the daylighting face and shady face of cell silicon chip, and negative electrode is positioned at the top of positive electrode; It is characterized in that: the spacing distance between A-battery sheet and the B battery sheet is a; The extension elongation that negative electrode on the A-battery sheet stretches to an end of B battery sheet is 7/10a～9/10a, and the other end contracts in cell silicon chip 0.5～3 millimeter, and the extension elongation that the positive electrode on the B battery sheet stretches to A-battery sheet one end is 7/10a～9/10a; The other end contracts in cell silicon chip 0.5～3 millimeter, and the positive electrode overlap joint back on negative electrode on the A-battery sheet and the B battery sheet is integrally welded.
Further, the length that the negative electrode on the A-battery sheet stretches out cell silicon chip is 8/10a～9/10a, and the length that the positive electrode on the B battery sheet stretches out cell silicon chip is 8/10a～9/10a.
Because the utility model has changed the electrode connecting structure between adjacent two battery sheets in the existing battery component; Positive electrode overlap joint back under negative electrode on the A-battery sheet and the B battery sheet is integrally welded; After adopting the syndeton of the utility model, be merely the thickness of cell silicon chip in the amount of contraction of two battery sheet joining places, and prior art is cell silicon chip thickness and metal welding tape thickness sum; In the encapsulation lamination process, both reduced the amount of contraction of two battery sheet joining places; Reduced the pressure of metal welding charged pool silicon chip significantly, can effectively prevent the cell silicon chip crushing, the resistance of junction reduces half the simultaneously; Improve the electric power output of battery component, stopped the battery component circuit defect that is heated and causes after softening because of the metal welding.Spacing distance between adjacent two battery sheets can reduce 20%～30%, thereby has improved effective daylighting area of solar module, helps the raising of the unit area output of solar module.
Description of drawings:
Fig. 1 is the syndeton sketch map of primary cell assembly welding;
Fig. 2 is the connection sketch map of the utility model;
Fig. 3 is the C-C sectional structure sketch map of Fig. 2;
Among the figure: A-A-battery sheet; B-B battery sheet; The 1-negative electrode; The 2-cell silicon chip; The 3-positive electrode.
Embodiment:
Introduce the embodiment of the utility model in detail below in conjunction with accompanying drawing:
A kind of solar components battery low resistance series welding access node structure; The A-battery sheet A and the B battery sheet B that comprise adjacent spaces; A-battery sheet A is identical with B battery sheet B structure all to be made up of negative electrode 1, cell silicon chip 2 and positive electrode 3, and negative electrode 1 is separately positioned on the daylighting face and shady face of cell silicon chip 2 with positive electrode 3, and negative electrode 1 is positioned at the top of positive electrode 3; Spacing distance between A-battery sheet A and the B battery sheet B is a; The length that negative electrode 1 on the A-battery sheet A stretches to B battery sheet B is 4/5a, and its other end contracts cell silicon chip 2 interior 3 millimeters, and it is 4/5a that the positive electrode 3 on the B battery sheet B stretches to adjacent A-battery sheet A one end extension elongation; The other end contracts cell silicon chip 2 interior 3 millimeters, and the negative electrode 1 on the A-battery sheet A is integrally welded with the positive electrode 3 overlap joint backs on the B battery sheet B.
Claims (2)
1. solar components battery low resistance series welding access node structure; The A-battery sheet (A) and the B battery sheet (B) that comprise adjacent spaces; Wherein, A-battery sheet (A) is identical with B battery sheet (B) structure, forms by negative electrode (1), cell silicon chip (2) and positive electrode (3); Negative electrode (1) and positive electrode (3) are separately positioned on the daylighting face and shady face of cell silicon chip (2); And negative electrode (1) is positioned at the top of positive electrode (3), it is characterized in that: the spacing distance between A-battery sheet (A) and the B battery sheet (B) is a, and the extension elongation that the negative electrode (1) on the A-battery sheet (A) stretches to an end of B battery sheet (B) is 7/10a～9/10a; The other end contracts in cell silicon chip (2) 0.5～3 millimeter; The extension elongation that positive electrode (3) on the B battery sheet (B) stretches to A-battery sheet (A) end is 7/10a～9/10a, and the other end contracts in cell silicon chip (2) 0.5～3 millimeter, and the negative electrode (1) on the A-battery sheet (A) is integrally welded with positive electrode (3) the overlap joint back on the B battery sheet (B).
2. according to the said solar components battery of claim 1 low resistance series welding access node structure; It is characterized in that: the length that the negative electrode (1) on the A-battery sheet (A) stretches out cell silicon chip (2) is 8/10a～9/10a, and the length that the positive electrode (3) on the B battery sheet (B) stretches out cell silicon chip (2) is 8/10a～9/10a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120536144 CN202585428U (en) | 2011-12-20 | 2011-12-20 | Low-resistance serial welding structure for solar cell component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120536144 CN202585428U (en) | 2011-12-20 | 2011-12-20 | Low-resistance serial welding structure for solar cell component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202585428U true CN202585428U (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120536144 Expired - Lifetime CN202585428U (en) | 2011-12-20 | 2011-12-20 | Low-resistance serial welding structure for solar cell component |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496636A (en) * | 2011-12-20 | 2012-06-13 | 常州亿晶光电科技有限公司 | Low-resistance serial welding structure for solar cell component |
| CN105903788A (en) * | 2016-06-22 | 2016-08-31 | 宁夏小牛自动化设备有限公司 | Adjustable independent-control welding strip press-bending device and method, and series welding machine |
| TWI553896B (en) * | 2015-07-21 | 2016-10-11 | Atomic Energy Council | The packaging method and structure of solar cell element |
-
2011
- 2011-12-20 CN CN 201120536144 patent/CN202585428U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496636A (en) * | 2011-12-20 | 2012-06-13 | 常州亿晶光电科技有限公司 | Low-resistance serial welding structure for solar cell component |
| TWI553896B (en) * | 2015-07-21 | 2016-10-11 | Atomic Energy Council | The packaging method and structure of solar cell element |
| CN105903788A (en) * | 2016-06-22 | 2016-08-31 | 宁夏小牛自动化设备有限公司 | Adjustable independent-control welding strip press-bending device and method, and series welding machine |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |
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| CX01 | Expiry of patent term |