CN102683459A - Solar cell - Google Patents

Solar cell Download PDF

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Publication number
CN102683459A
CN102683459A CN2012100600919A CN201210060091A CN102683459A CN 102683459 A CN102683459 A CN 102683459A CN 2012100600919 A CN2012100600919 A CN 2012100600919A CN 201210060091 A CN201210060091 A CN 201210060091A CN 102683459 A CN102683459 A CN 102683459A
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China
Prior art keywords
alignment mark
solar battery
battery cell
sensitive surface
line
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CN2012100600919A
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Chinese (zh)
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CN102683459B (en
Inventor
鹤冈恭生
竹村贤三
浅川雄介
藤井正规
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Showa Denko Materials Co Ltd
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Hitachi Chemical Co Ltd
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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
    • H01L31/02—Details
    • 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
    • H01L31/02—Details
    • H01L31/0224—Electrodes
    • H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • 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
    • 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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  • Engineering & Computer Science (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)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Photovoltaic Devices (AREA)

Abstract

The invention provides a solar cell and a related method for enabling a TAB line to be connected to a desired position, thereby limiting possible increase in production cost. This solar cell is provided with: a plurality of finger electrodes disposed at the light-receiving surface of a substrate; and an alignment mark that indicates a position at which a tabbing wire is attached to the finger electrodes with an adhesive therebetween. The alignment mark has a portion provided discontinuously to the light-receiving surface along a line perpendicular to the two finger electrodes positioned the closest to the opposite edges of the light-receiving surface.

Description

Solar battery cell
Technical field
The present invention relates to solar battery cell.
Background technology
In recent years, as the means that are used to solve the problem that serious day by day global warming and fossil energy exhaust, solar cell has been paid much attention to.Usually through with a plurality of solar battery cell serial or parallel connections link together and form solar cell.For electric power is provided, solar battery cell comprises the electrode (finger electrode) of a plurality of linearities that are arranged in abreast that its front (sensitive surface) is gone up and formed by Ag.The backplate that is formed by Al is formed the whole back side that spreads all over solar battery cell.Then; Through metal wiring member (TAB line) being connected to the sensitive surface of a solar battery cell in the adjacent solar battery cell; So that metal wiring member and all finger electrodes intersect; And further the TAB line is connected to the backplate of another solar battery cell, adjacent solar battery cell is joined together.
The scolding tin that presents satisfactory electrical conductivity is normally used for connecting TAB line (Japanese Patent Laid is opened the 2002-263880 communique).In addition, in some cases, consider environmental problem, used the Sn-Ag-Cu scolding tin (Japanese Patent Laid is opened 2002-263880 number and the 2004-204256 communique) that does not comprise Pb recently.But when these scolding tin were used to connect the TAB line, solar battery cell was heated more than 220 ℃ with about.Thereby the rate of finished products of Connection Step possibly reduce, and perhaps solar battery cell possibly become curved.In order to suppress this, can increase the thickness of the silicon in the solar battery cell.But in this case, production cost increases.
In addition; When this scolding tin of describing is used to connect the TAB line; In order to ensure the wettability of scolding tin, need take following measure: the electrode (busbar electrode) that forms by Ag the position at TAB line place by the front and back of preform at solar battery cell on.But Ag is expensive, thereby helps to increase cost.In addition, Ag provides high resistance, thereby thin busbar electrode provides high film resistor (sheet resistance).This has increased power loss, thereby reduces the power generation performance of solar battery cell.Thereby in order to suppress the film resistor of busbar electrode, the busbar electrode need be increased to a certain degree on width.This has further increased production cost.
Therefore; In recent years; Proposed a kind of method, in the method, the electroconductive binder with conductive adhesive is used to replace scolding tin to connect TAB line (Japanese Patent Laid is opened 8-330615,2003-133570,2005-243935 and 2007-265635 communique).Electroconductive binder is a thermosetting resin wherein mixed such as the metallic particles of Al particle and dispersion.Metallic particles is sandwiched between the electrode of TAB line and solar battery cell realizing and is electrically connected.If electroconductive binder is used to connect the TAB line, then this connection can be performed below 200 ℃.This change of reduction and solar battery cell of rate of finished products that has suppressed Connection Step is curved.In addition, if electroconductive binder is used to connect the TAB line, then needn't guarantee wettability.This has eliminated the needs to the busbar electrode that forms in order to ensure wettability again, thereby has reduced the use of Ag.
But, avoid the busbar electrode to be formed on the identification that has hindered the connected position of TAB line on the positive or back side of solar battery cell.This possibly hinder the TAB line and accurately adhered on the position of wanting.When the TAB line failed to be adhered on the position of wanting, the line of solar battery cell maybe be crooked.So, residual stress possibly produced in solar battery cell, and fabrication yield possibly reduce.
Made the present invention to address the above problem.The purpose of this invention is to provide a kind of solar battery cell, this solar battery cell makes the TAB line accurately to be connected to want the position, allows to suppress the possible increase on the production cost simultaneously.
Summary of the invention
According to a wide in range notion; The present invention provides a kind of solar battery cell; Comprise a plurality of finger electrodes on the sensitive surface that is arranged in photovoltaic substrate; And the alignment mark of the link position of indication TAB line will be connected on the finger electrode by electroconductive binder the time, this alignment mark has along line and is arranged on the part on the sensitive surface discontinuously, and this line intersects with two finger electrodes that are arranged near the finger electrode at the two ends of sensitive surface.
In aspect one of which is individual; The present invention provides a kind of solar battery cell; The TAB line that comprises a plurality of finger electrodes of being arranged on the sensitive surface and be connected to finger electrode by electroconductive binder; This solar battery cell comprises that indication TAB line is connected to the alignment mark (in whole specification, also being called as alignment mark or mark) of the position of finger electrode; This alignment mark is arranged on the sensitive surface along line discontinuously, and this line intersects with the finger electrode at the two ends that are positioned at sensitive surface, and this alignment mark uses the material identical materials with finger electrode; Have the mode of the live width of the live width that is equal to or less than the TAB line that will be connected to finger electrode with alignment mark, integrally formed with finger electrode.
In solar battery cell according to the present invention, the alignment mark that indication TAB line is connected to the position of finger electrode is set up along line, and this line intersects with the finger electrode at the two ends that are positioned at sensitive surface.Therefore, the inspection alignment mark allows the link position of TAB line visually to be discerned.Therefore, the TAB line can accurately be connected to the position of wanting.In addition, the material that the material of alignment mark use and finger electrode is same as, integrally formed with finger electrode.This allows alignment mark easily in the formation of finger electrode, to be formed.In addition, alignment mark is formed along above-mentioned line discontinuously, and has live width, and this live width is equal to or less than the live width of the TAB line that will be connected to finger electrode.Therefore, compare with being formed with continuous busbar therein and having with the solar battery cell of the routine of the same width of the width of TAB line, solar battery cell according to the present invention is used for being suppressed at the possible increase on the consumption of electrode material.As a result, the possible increase on can the limit production cost.
Here, alignment mark preferably is configured as the dotted line shape.This not only allows the possible increase on the consumption of electrode material to be suppressed, and has guaranteed visual identification.
In addition, preferably, the various piece of alignment mark is crossed over a plurality of finger electrodes.Then, when checking the performance of finger electrode, the number of the probe that is used to check can be reduced.This can reduce the inspection cost.
In addition, preferably, a line is provided with a plurality of alignment marks.This allows alignment mark more easily by visually identification, allows the TAB line accurately to be connected to the position of wanting.
In addition, preferably, to a plurality of alignment marks setting interlaced with each other of a line setting.This allows alignment mark more easily by visually identification, allows the TAB line accurately to be connected to the position of wanting.
In addition, preferably, a plurality of alignment marks of a line setting are being equal in width to or greater than electroconductive binder.Then, electroconductive binder can be applied between a plurality of alignment marks, so that alignment mark can be by visually identification after the applying of adhesive.Therefore, the TAB line can be connected to the position of wanting more accurately.
In addition, preferably, the various piece of alignment mark live width first-class in or less than finger electrode.This makes that the possible increase on the consumption of electrode material can be suppressed further.As a result, the possible increase on can the limit production cost.
In addition, preferably, the live width of the various piece of alignment mark is 0.05mm and 0.2mm at least at the most.This makes that the possible increase on the consumption of electrode material can be suppressed further.As a result, the possible increase on can the limit production cost.
In addition; Solar module according to the present invention comprises a plurality of above-mentioned solar battery cell that is arranged in wherein; So that the finger electrode of a solar battery cell in the adjacent solar battery cell uses the TAB line of arranging along alignment mark by electroconductive binder, is connected to the backplate on the back side that is formed on another solar battery cell in the adjacent solar battery cell.In solar module according to the present invention, the TAB line accurately is connected to the position of wanting, thereby allows the row of restriction solar battery cell crooked.Therefore, when solar module is made, can suppress the possible residual stress in the solar battery cell.Therefore, can improve fabrication yield.
Generally speaking; Solar module of the present invention comprises a plurality of aforesaid solar battery cells of the present invention; Wherein the TAB line is positioned on the solar battery cell in a plurality of solar battery cells along alignment mark; And be connected to the finger electrode of this solar battery cell by electroconductive binder, and the TAB line is connected to the backplate on the back side that is formed on another solar battery cell in a plurality of solar battery cells further.
According to another wide in range notion; The present invention provides a kind of method of making solar battery cell; Comprise: setting has the photovoltaic substrate that is arranged in a plurality of finger electrodes on its sensitive surface; Sensitive surface has the zone of preset width, holding the electroconductive binder that has same widths with this zone, and in this zone or be adjacent to this location; The alignment mark that indication TAB line will be connected to finger electrode by electroconductive binder is set; Alignment mark has along line and is arranged on the part on the sensitive surface discontinuously, and this line intersects with two finger electrodes that are arranged near the finger electrode at the two ends of said sensitive surface, before a plurality of finger electrodes are formed on the sensitive surface or after alignment mark is set.Each alignment mark part can be formed by the material identical materials with finger electrode, and each alignment mark part further has the live width of the live width that is equal to or less than the TAB line.Each alignment mark part can be formed by the material material different with finger electrode, and each alignment mark part further has the live width of the live width that is equal to or less than the TAB line.Each alignment mark part is integrally formed with at least one the corresponding finger electrode in the finger electrode.Alignment mark can be discontinuous on the direction of said line being roughly parallel to, and said two finger electrodes in said line and the finger electrode intersect.Alignment mark can be discontinuous on the direction of said line being approximately perpendicular to, and said two finger electrodes in said line and the said finger electrode intersect.Alignment mark can be a dotted line.The various piece of alignment mark can be intersected with a plurality of finger electrodes.Alignment mark can comprise along a plurality of elongated straight line portion of single straight line location.Alignment mark can interlaced with each otherly be provided with.Alignment mark part can the localized area, and this zone has the width of the width that is equal to, or greater than electroconductive binder.The various piece of alignment mark has the width of the width that is equal to or less than a finger electrode in the said finger electrode.The various piece of alignment mark has 0.05mm and the width of 0.2mm at least at the most.
According to another wide in range notion; The present invention provides a kind of method of making solar module; May further comprise the steps: 1) a plurality of said solar battery cells are set; 2) the TAB line is positioned on the solar battery cell in a plurality of solar battery cells along alignment mark; And the TAB line is connected to the finger electrode of a said solar battery cell, and 3) the TAB line is connected to backplate on the back side that is formed on another solar battery cell in a plurality of solar battery cells, with arbitrary order execution in step 2 by said electroconductive binder) and 3.
Therefore, the invention provides a kind of solar battery cell and relevant method, make the TAB line can accurately be connected to the position of wanting, allow to suppress the possible increase on the production cost simultaneously.
Description of drawings
Fig. 1 is the plane graph of demonstration according to the sensitive surface of the solar battery cell of the first embodiment of the present invention;
Fig. 2 is the ground plan at the back side of the solar battery cell in the displayed map 1;
Fig. 3 is the stereogram that shows that the solar battery cell among a plurality of Fig. 1 is joined together;
Fig. 4 is the schematic end view of Fig. 3; And
Fig. 5 is the plane graph that shows the front of solar battery cell according to a second embodiment of the present invention.
Fig. 6 is the plane graph in front that shows the solar battery cell of a third embodiment in accordance with the invention.
Fig. 7 is the plane graph in front that shows the solar battery cell of a fourth embodiment in accordance with the invention.
Fig. 8 is the plane graph that shows the front of solar battery cell according to a fifth embodiment of the invention.
Fig. 9 is the plane graph that shows the front of solar battery cell according to a sixth embodiment of the invention.
Figure 10 is the plane graph that shows the front of solar battery cell according to a seventh embodiment of the invention.
Figure 11 is the plane graph of demonstration according to the front of the solar battery cell of the eighth embodiment of the present invention.
Figure 12 is the plane graph of demonstration according to the front of the solar battery cell of the nineth embodiment of the present invention.
Figure 13 is the plane graph of demonstration according to the front of the solar battery cell of the tenth embodiment of the present invention.
Figure 14 is the plane graph of demonstration according to the front of the solar battery cell of the 11st embodiment of the present invention.
Figure 15 is the plane graph of demonstration according to the front of the solar battery cell of the 12nd embodiment of the present invention.
Figure 16 is the plane graph of demonstration according to the front of the solar battery cell of the 13rd embodiment of the present invention.
Figure 17 is the plane graph of demonstration according to the front of the solar battery cell of the 14th embodiment of the present invention.
Figure 18 is the plane graph of demonstration according to the front of the solar battery cell of the 15th embodiment of the present invention.
Figure 19 is the plane graph of demonstration according to the front of the solar battery cell of the 16th embodiment of the present invention.
Figure 20 is the plane graph of demonstration according to the front of the solar battery cell of the 17th embodiment of the present invention.
Figure 21 is the figure of an instance that shows the sensitive surface alignment mark of dashed line form.
Embodiment
The preferred embodiment that specifically describes according to solar battery cell of the present invention below with reference to accompanying drawings and be used to make the method for solar battery cell.With identical reference number indication components identical, and the description of omission repetition.
Fig. 1 is the plane graph of demonstration according to the sensitive surface of the solar battery cell of the first embodiment of the present invention.Fig. 2 is the ground plan at the back side of the solar battery cell in the displayed map 1.Fig. 3 is the stereogram that shows that the solar battery cell among a plurality of Fig. 1 is joined together.Fig. 4 is the schematic end view of Fig. 3.
As shown in Figure 1, solar battery cell 100 be so so that a plurality of solar battery cells 100 by serial or parallel connection be electrically connected to form a solar module.Solar battery cell 100 comprises substrate 2.Substrate 2 roughly is foursquare and has four circular-arc turnings.A surface of substrate 2 is equivalent to sensitive surface 21.Another surface of substrate 2 is equivalent to the back side 22 (referring to Fig. 2).Substrate 2 can be formed by in the polycrystal of the monocrystal of Si, Si and Si noncrystal at least one.On sensitive surface 21 sides, substrate 2 can be formed by n N-type semiconductor N or p N-type semiconductor N.On substrate 2, for example, the distance between two opposite sides is 125mm.
The finger electrode 3 of a plurality of (for example, 48) linearity is by parallel and be arranged in away from each other on the sensitive surface 21.When a plurality of solar battery cells 100 were joined together to form solar module, TAB line 4 was connected to finger electrode 3 (referring to Fig. 4) by electroconductive adhesive films (electroconductive binder) 5 separately.The live width of each finger electrode 3 for example is 0.15mm.Between the adjacent finger electrode 3 for example is 2.55mm apart from df.
Each finger electrode 3 is by providing the known materials that conducts to form.The instance of the material of finger electrode 3 comprises, comprises the glass cream of silver; Be included in the silver paste, gold paste, carbon paste, nickel cream and the aluminium cream that wherein are dispersed with a kind of adhesive resin in the various conductive particles separately; And through the ITO that burns or deposition forms.Among these materials, with regard to thermal endurance, conductivity, stability and cost, preferably use the glass cream that comprises silver.
Adhesion area SF, SF are the zones that is applied with the sensitive surface 21 of electroconductive adhesive films 5,5 separately.The width wc of adhesion area SF (that is the width at electroconductive adhesive films 5 places) for example is 1.2mm.Between adhesion area SF, the SF for example is 62mm apart from dc.In addition, the width that is connected to the TAB line 4 of adhesion area SF for example is 1.5mm.
Sensitive surface alignment mark 6A, 6A are arranged on the sensitive surface 21 so that form dotted line along line L discontinuously; Line L intersects with the finger electrode 3,3 at the two ends that are positioned at sensitive surface.More specifically, the part 61A L along the line of the sensitive surface alignment mark 6A that only intersects with a finger electrode 3 separately is arranged on every on one finger electrode 3 continuously.Sensitive surface alignment mark 6A indication TAB line 4 is connected to the position of finger electrode 3.For example, sensitive surface alignment mark 6A is disposed in the core of adhesion area SF.
Sensitive surface alignment mark 6A uses and comes with finger electrode 3 integrally formed with the material identical materials of finger electrode 3.That is to say that sensitive surface alignment mark 6A is formed by the glass cream that comprises silver; Form by being included in the silver paste, gold paste, carbon paste, nickel cream and the aluminium cream that wherein are dispersed with a kind of adhesive resin in the various conductive particles separately; Perhaps form by the ITO that forms through burning or deposition.Among these materials, with regard to thermal endurance, conductivity, stability and cost, preferably use the glass cream that comprises silver.Sensitive surface alignment mark 6A is formed in the formation of finger electrode 3.
The live width of the various piece 61A of sensitive surface alignment mark 6A is 0.05mm and 0.2mm at least at the most, for example, is and the 0.15mm live width same according to the finger electrode of present embodiment 3.That is to say, the various piece 61A of sensitive surface alignment mark 6A live width first-class in or less than finger electrode 3.When the live width of sensitive surface alignment mark 6A is at least during 0.05mm, guarantee visual identification, allow sensitive surface alignment mark 6A as alignment mark.In addition, when the live width of sensitive surface alignment mark 6A is at the most during 0.2mm, can reduce the consumption of electrode material fully.And, first-class in the time as sensitive surface alignment mark 6A perhaps less than finger electrode 3 in live width, can reduce the consumption of electrode material further.Alternatively, the various piece 61A of sensitive surface alignment mark 6A is preferably at the most 20% of TAB line on live width, and sensitive surface alignment mark 6A is connected to the TAB line.Distance between sensitive surface alignment mark 6A, the 6A be and adhesion area SF, SF between the 62mm same apart from dc.
As shown in Figure 2, backplate 7 is formed the whole back side 22 that spreads all over solar battery cell 100.When a plurality of solar battery cells 100 were joined together to form solar module, TAB line 4 was connected to backplate 7 (referring to Fig. 4) by electroconductive adhesive films 5 separately.For example, form backplate 7 through BURNING ALUMINUM cream.
Adhesion area SB, SB indication are applied with the zone at the back side 22 of electroconductive adhesive films 5.The position of adhesion area SB, SB is corresponding to the position of the adhesion area SF on the sensitive surface 21.As the width wc (referring to Fig. 1) of adhesion area SF, the width of adhesion area SB for example is 1.2mm.As between adhesion area SF, the SF apart from dc (referring to Fig. 1), the distance between adhesion area SB, the SB for example is about 62mm.In addition, as the width of the TAB line that is connected to sensitive surface 21, the width that is connected to the TAB line 4 of corresponding adhesion area SB for example is 1.5mm.
Back side alignment mark 71,71 is set on the back side 22 along adhesion area SB separately, so that connect two opposite sides on the substrate 2.The corresponding TAB line 4 of back side alignment mark 71 indications is connected to the position of backplate 7.For example, back side alignment mark 71 is positioned in the core of adhesion area SB for example.Back side alignment mark 71 is shaped as similar groove-like.Be positioned at backplate 7 following exposing from backplate 7, thereby be visible with back side alignment mark 71 corresponding a part of substrates 2.
When TAB line 4 was connected to backplate 7 by separately electroconductive adhesive films 5, electroconductive adhesive films 5 needed to be contacted with backplate 7 reliably.Thereby the width of back side alignment mark 71 is less than the width of TAB line 4, and for example is about 0.1 to 0.9mm.As the distance between adhesion area SB, the SB, back side alignment mark 71, the distance between 71 for example are 62mm.
As shown in Figure 3; This solar battery cell 100 is arranged to a row so that sensitive surface alignment mark 6A forms straight line; And solar battery cell 100 is bonded to together by means of TAB line 4, and TAB line 4 is arranged along separately sensitive surface alignment mark 6A by electroconductive adhesive films 5.Through by means of corresponding TAB line 4; Finger electrode 3 on sensitive surface 21 sides of solar battery cell 100A is connected to the backplate 7 (referring to Fig. 4) on the back side 22 sides with the solar battery cell 100B of solar battery cell 100A adjacency; Further by means of corresponding TAB line; Finger electrode 3 on sensitive surface 21 sides of solar battery cell 100B is connected to the backplate 7 on the back side 22 sides with the solar battery cell 100C of solar battery cell 100B adjacency; And repeat this operation, realize combining.Therefore, a plurality of solar battery cells 100 that are arranged to delegation are electrically connected in series in together.More than one this row are set to form solar module.
As stated; In solar battery cell 100 according to present embodiment; The sensitive surface alignment mark 6A, the 6A that indicate each TAB line 4 to be connected to the position of finger electrode 3 are set up along line L, L separately, and line L, L and the finger electrode 3,3 that is positioned at the two ends of sensitive surface intersect.Therefore, inspection sensitive surface alignment mark 6A, 6A allow visually to discern the link position that is used for TAB line 4.Therefore, each TAB line 4 can accurately be connected to the position of wanting.
In addition, in solar battery cell 100, sensitive surface alignment mark 6A is formed in the formation of finger electrode 3, and the material identical materials of use and finger electrode 3 is come with finger electrode 3 integrally formed.Therefore, sensitive surface alignment mark 6A can easily be formed, and allows the possible increase on the production cost to be suppressed.
In addition, in solar battery cell 100, sensitive surface alignment mark 6A is formed along line L discontinuously, and has the live width of the live width that is equal to or less than TAB line 4, and sensitive surface alignment mark 6A is connected to TAB line 4.Therefore, compare with being formed with continuous busbar electrode therein and having with the solar battery cell of the routine of the same width of the width of TAB line, solar battery cell according to the present invention is used for suppressing the possible increase on the consumption of electrode material.As a result, the possible increase on can the limit production cost.
In addition, in solar battery cell 100, sensitive surface alignment mark 6A is shaped as similar dotted line.This not only allows the possible increase on the consumption of electrode material to be suppressed, and has guaranteed visual identification.
In addition, in solar battery cell 100, the live width of the various piece 61A of sensitive surface alignment mark 6A is 0.05mm and 0.2mm at least at the most, and perhaps live width is equal to or less than the live width of finger electrode 3.This makes that the possible increase on the consumption of electrode material can be suppressed further.As a result, the possible increase on can the limit production cost.
In addition; In the solar module that forms by solar battery cell 100; A plurality of solar battery cells 100 are arranged; And the finger electrode 3 in adjacent solar battery cell 100 is connected to the backplate 7 on the back side 22 that is formed on another solar battery cell 100 by means of each TAB line 4, by corresponding electroconductive adhesive films 5 each TAB line 4 along corresponding sensitive surface alignment mark 6A layout.In this solar module, TAB line 4 accurately is connected to the position of wanting, and allows the row of restriction solar battery cell 100 crooked.Therefore, when solar module is made, can suppress the possible residual stress in the solar battery cell 100, allow to improve fabrication yield.
Now, with the solar battery cell of describing according to a second embodiment of the present invention.The description of present embodiment concentrates in the difference with first embodiment.
Fig. 5 is the plane graph that shows the front of solar battery cell according to a second embodiment of the present invention.As shown in Figure 5; According to the solar battery cell 110 of present embodiment and different being according to the solar battery cell 100 (referring to Fig. 1) of first embodiment, solar battery cell 110 is included in the sensitive surface alignment mark 6B different with sensitive surface alignment mark 6A on the arrangement pattern of part of alignment mark.
The part 61B that sensitive surface alignment mark 6B has a sensitive surface alignment mark 6B wherein along line L by the pattern of arranging continuously; Various piece 61B crosses over two adjacent finger electrodes 3,3, so that finger electrode 3,3 is linked together.
Certainly, solar battery cell 110 produces and the same effect of effect according to the solar battery cell 100 of first embodiment.
In addition, in solar battery cell 110, the various piece 61B of sensitive surface alignment mark 6B crosses over two finger electrodes 3,3.The sensitive surface alignment mark 6B that so disposes helps to simplify the inspection of broken string to finger electrode 3 or the like.That is to say that in this structure, a plurality of finger electrodes 3 that the various piece 61B of sensitive surface alignment mark 6B crosses over form a set.Thereby, when probe touches this set, can check a plurality of finger electrodes 3 at every turn.Therefore, check that the number of required probe can be reduced, can reduce the inspection cost.
Now, with the solar battery cell of describing a third embodiment in accordance with the invention.With the difference of mainly describing the present embodiment and first embodiment.
Fig. 6 is the plane graph in front that shows the solar battery cell of a third embodiment in accordance with the invention.As shown in Figure 6; According to the solar battery cell 120 of present embodiment and different being according to the solar battery cell 100 (referring to Fig. 1) of first embodiment, solar battery cell 120 is included in the sensitive surface alignment mark 6C different with sensitive surface alignment mark 6A on the arrangement pattern of part of alignment mark.
Sensitive surface alignment mark 6C have wherein part 61C and part 62C along line L by alternately and the pattern of arranging continuously; Various piece 61C only intersects with a finger electrode 3, and various piece 62C crosses over two adjacent finger electrodes 3,3, so that finger electrode 3,3 is linked together.In addition, part 62C, the 62C outside and each that are positioned in the finger electrode 3,3 at the two ends that are positioned at sensitive surface only combines with a finger electrode 3.
Certainly, the solar battery cell 120 of configuration produces and the same effect of effect according to the solar battery cell 100 of first embodiment as stated.
In addition, in solar battery cell 120, the various piece 62C of sensitive surface alignment mark 6C crosses over two finger electrodes 3,3.The sensitive surface alignment mark 6C that so disposes helps to simplify the inspection of broken string to finger electrode 3 or the like.That is to say that in this structure, a plurality of finger electrodes 3 that the various piece 62C of sensitive surface alignment mark 6C crosses over form a set.Thereby, when probe touches this set, can check a plurality of finger electrodes 3 at every turn.Therefore, check that the number of required probe can be reduced, can reduce the inspection cost.
In addition, in solar battery cell 120, part 62C, 62C are positioned in the outside of the finger electrode 3,3 at the two ends that are positioned at sensitive surface.Thereby when electroconductive adhesive films 5 was applied to solar battery cell 120, the part 62C of sensitive surface alignment mark 6C, 62C can stretch out from electroconductive adhesive films 5.As a result, can visually discern electroconductive adhesive films 5 and whether be applied to the position of wanting.This allows TAB line 4 to be connected to the position of wanting more accurately.
Now, with the solar battery cell of describing a fourth embodiment in accordance with the invention.With the difference of mainly describing the present embodiment and first embodiment.
Fig. 7 is the plane graph in front that shows the solar battery cell of a fourth embodiment in accordance with the invention.As shown in Figure 7; According to the solar battery cell 130 of present embodiment and different being according to the solar battery cell 100 (referring to Fig. 1) of first embodiment, solar battery cell 130 is included in the sensitive surface alignment mark 6D different with sensitive surface alignment mark 6A on the arrangement pattern of part of alignment mark.
Sensitive surface alignment mark 6D have part 61D wherein along line L by the pattern of arranging continuously; Various piece 61D crosses over two adjacent finger electrodes 3,3, so that finger electrode 3,3 is linked together.In addition, part 61D, the 61D outside and each that are positioned in the finger electrode 3,3 at the two ends that are positioned at sensitive surface only combines with a finger electrode 3.
Certainly, the solar battery cell 130 of configuration produces and the same effect of effect according to the solar battery cell 100 of first embodiment as stated.
In addition, in solar battery cell 130, the various piece 61D of sensitive surface alignment mark 6D crosses over two finger electrodes 3,3.The sensitive surface alignment mark 6D that so disposes helps to simplify the inspection of broken string to finger electrode 3 or the like.That is to say that in this structure, a plurality of finger electrodes 3 that the various piece 61D of sensitive surface alignment mark 6D crosses over form a set.Thereby, when probe touches this set, can check a plurality of finger electrodes 3 at every turn.Therefore, check that the number of required probe can be reduced, can reduce the inspection cost.
In addition, in solar battery cell 130, part 61D, 61D are positioned in the outside of the finger electrode 3,3 at the two ends that are positioned at sensitive surface.Thereby when electroconductive adhesive films 5 was applied to solar battery cell 130, the part 61D of sensitive surface alignment mark 6D, 61D can stretch out from electroconductive adhesive films 5.As a result, can visually discern electroconductive adhesive films 5 and whether be applied to the position of wanting.This allows TAB line 4 to be connected to the position of wanting more accurately.
Now, with the solar battery cell of describing according to a fifth embodiment of the invention.With the difference of mainly describing the present embodiment and first embodiment.
Fig. 8 is the plane graph that shows the front of solar battery cell according to a fifth embodiment of the invention.As shown in Figure 8; According to the solar battery cell 140 of present embodiment and different being according to the solar battery cell 100 (referring to Fig. 1) of first embodiment, solar battery cell 140 is included in the sensitive surface alignment mark 6E different with sensitive surface alignment mark 6A on length and the arrangement pattern of part of alignment mark.
Sensitive surface alignment mark 6E have part 61E wherein along line L by the pattern of arranging continuously; Various piece 61E crosses over one group of four adjacent finger electrode 3 to 3, links together so that will be arranged in two finger electrodes of four finger electrodes 3 to 3 at the two ends of this group.Only cross over three adjacent finger electrodes 3 to 3 with the part 61E that intersect with finger electrode 3 of the lower end that is positioned at sensitive surface.In addition, a finger electrode 3 that does not combine with any part 61E is inserted between continuous part 61E, the 61E.
Certainly, the solar battery cell 140 of configuration produces and the same effect of effect according to the solar battery cell 100 of first embodiment as stated.
In addition, in solar battery cell 140, the various piece 61E of sensitive surface alignment mark 6E crosses over four finger electrodes 3,3.The sensitive surface alignment mark 6E that so disposes helps to simplify the inspection of broken string to finger electrode 3 or the like.That is to say that in this structure, a plurality of finger electrodes 3 that the various piece 61E of sensitive surface alignment mark 6E crosses over form a set.Thereby, when probe touches this set, can check a plurality of finger electrodes 3 at every turn.Therefore, check that the number of required probe can be reduced, can reduce the inspection cost.
Now, with the solar battery cell of describing according to a sixth embodiment of the invention.With the difference of mainly describing the present embodiment and first embodiment.
Fig. 9 is the plane graph that shows the front of solar battery cell according to a sixth embodiment of the invention.As shown in Figure 9; According to the solar battery cell 150 of present embodiment and different being according to the solar battery cell 100 (referring to Fig. 1) of first embodiment, solar battery cell 150 is included in the sensitive surface alignment mark 6F different with sensitive surface alignment mark 6A on length and the arrangement pattern of part of alignment mark.
Sensitive surface alignment mark 6F have part 61F wherein along line L by the pattern of arranging continuously; Various piece 61F crosses over three adjacent finger electrodes 3 to 3, so that finger electrode 3 is linked together to 3.In addition, a finger electrode 3 that does not combine with any part 61F is inserted between continuous part 61F, the 61F.
Certainly, the solar battery cell 150 of configuration produces and the same effect of effect according to the solar battery cell 100 of first embodiment as stated.
In addition, in solar battery cell 150, the various piece 61F of sensitive surface alignment mark 6F crosses over three finger electrodes 3 to 3.The sensitive surface alignment mark 6F that so disposes helps to simplify the inspection of broken string to finger electrode 3 or the like.That is to say that in this structure, a plurality of finger electrodes 3 that the various piece 61F of sensitive surface alignment mark 6F crosses over form a set.Thereby, when probe touches this set, can check a plurality of finger electrodes 3 at every turn.Therefore, check that the number of required probe can be reduced, can reduce the inspection cost.
Now, with the solar battery cell of describing according to a seventh embodiment of the invention.With the difference of mainly describing the present embodiment and first embodiment.
Figure 10 is the plane graph that shows the front of solar battery cell according to a seventh embodiment of the invention.Shown in figure 10; According to the solar battery cell 160 of present embodiment and different being according to the solar battery cell 100 (referring to Fig. 1) of first embodiment, solar battery cell 160 is included in the sensitive surface alignment mark 6G different with sensitive surface alignment mark 6A on length and the arrangement pattern of part of alignment mark.
Sensitive surface alignment mark 6G have part 61G wherein along line L by the pattern of arranging continuously; Various piece 61G crosses over one group of three adjacent finger electrode 3 to 3, links together so that will be arranged in two finger electrodes of three finger electrodes 3 to 3 at the two ends of this group.The lower end of various piece 61G is outstanding from this group three adjacent finger electrodes 3.In addition, two finger electrodes 3 that do not combine with any part 61G are inserted between continuous part 61G, the 61G.
Certainly, the solar battery cell 160 of configuration produces and the same effect of effect according to the solar battery cell 100 of first embodiment as stated.
In addition, in solar battery cell 160, the various piece 61G of sensitive surface alignment mark 6G crosses over three finger electrodes 3 to 3.The sensitive surface alignment mark 6G that so disposes helps to simplify the inspection of broken string to finger electrode 3 or the like.That is to say that in this structure, a plurality of finger electrodes 3 that the various piece 61G of sensitive surface alignment mark 6G crosses over form a set.Thereby, when probe touches this set, can check a plurality of finger electrodes 3 at every turn.Therefore, check that the number of required probe can be reduced, can reduce the inspection cost.
Now, with the solar battery cell of describing according to the eighth embodiment of the present invention.With the difference of mainly describing the present embodiment and first embodiment.
Figure 11 is the plane graph of demonstration according to the front of the solar battery cell of the eighth embodiment of the present invention.Shown in figure 11; According to the solar battery cell 170 of present embodiment and different being according to the solar battery cell 100 (referring to Fig. 1) of first embodiment, solar battery cell 170 is included in the sensitive surface alignment mark 6H different with sensitive surface alignment mark 6A on length and the arrangement pattern of part of alignment mark.
Sensitive surface alignment mark 6H have wherein part 61H and part 62H along line L by the pattern of arranging continuously; Various piece 61H crosses over one group of three adjacent finger electrode 3 to 3; So that will be arranged in two finger electrodes of three finger electrodes 3 to 3 at the two ends of this group links together; The lower end of various piece 61H is outstanding from this group three finger electrodes 3,3; And various piece 62H crosses over one group of three adjacent finger electrode 3 to 3; Link together so that will be arranged in two finger electrodes of three finger electrodes 3 to 3 at the two ends of this group, the upper end of various piece 62H is outstanding from this group three finger electrodes 3,3.In addition, two finger electrodes 3 that do not combine with any part 61H and 62H are inserted between continuous the part 61H and 62H.
Certainly, the solar battery cell 170 of configuration produces and the same effect of effect according to the solar battery cell 100 of first embodiment as stated.
In addition, in solar battery cell 170, the various piece 61H of sensitive surface alignment mark 6H and 62H cross over three finger electrodes 3 to 3.The sensitive surface alignment mark 6H that so disposes helps to simplify the inspection of broken string to finger electrode 3 or the like.That is to say that in this structure, a plurality of finger electrodes 3 that the various piece 61H of sensitive surface alignment mark 6H and 62H cross over form a set.Thereby, when probe touches this set, can check a plurality of finger electrodes 3 at every turn.Therefore, check that the number of required probe can be reduced, can reduce the inspection cost.
Now, with the solar battery cell of describing according to the nineth embodiment of the present invention.With the difference of mainly describing the present embodiment and first embodiment.
Figure 12 is the plane graph of demonstration according to the front of the solar battery cell of the nineth embodiment of the present invention.Shown in figure 12, according to the solar battery cell 180 of present embodiment and different being, a line L is provided with a plurality of sensitive surface alignment mark 6I according to the solar battery cell 100 (referring to Fig. 1) of first embodiment.
A line L is provided with a plurality of (for example, two) sensitive surface alignment mark 6I.For example, sensitive surface alignment mark 6I is separately positioned on the right side and left side of line L.Width W a between sensitive surface alignment mark 6I and the 6I is equal to, or greater than the width W c (that is the width of electroconductive adhesive films 5) of adhesion area SF.The part 61I that sensitive surface alignment mark 6I only has wherein the sensitive surface alignment mark 6I that intersects with a finger electrode 3 is arranged on every pattern on one finger electrode 3 continuously along line L.In addition, among the sensitive surface alignment mark 6I and 6I on right side that is set up online L respectively and left side, the part 61I of a sensitive surface alignment mark 6I is interlocked with respect to the part 61I of another sensitive surface alignment mark 6I.Thereby, sensitive surface alignment mark 6I and 6I setting interlaced with each other.
Certainly, the solar battery cell 180 of configuration produces and the same effect of effect according to the solar battery cell 100 of first embodiment as stated.
In addition, in solar battery cell 180, because a line L is provided with a plurality of (for example, two) sensitive surface alignment mark 6I, so alignment mark can allow TAB line 4 accurately to be connected to the position of wanting more easily by visually identification.
In addition, in solar battery cell 180, a plurality of (for example, two) sensitive surface alignment mark 6I that line L is provided with, the width W a between the 6I are equal to, or greater than the width W c of electroconductive adhesive films 5.Thereby electroconductive adhesive films 5 can be applied between sensitive surface alignment mark 6I and the 6I, so that sensitive surface alignment mark 6I, 6I can be by visually identifications after the applying of electroconductive adhesive films 5.Therefore, TAB line 4 can be connected to the position of wanting more accurately.
In addition, in solar battery cell 180, to a plurality of sensitive surface alignment mark 6I and the 6I setting interlaced with each other of a line L setting.Thereby alignment mark can allow TAB line 4 accurately to be connected to the position of wanting more easily by visually identification.
Now, with the solar battery cell of describing according to the tenth embodiment of the present invention.With the difference of mainly describing the present embodiment and first embodiment.
Figure 13 is the plane graph of demonstration according to the front of the solar battery cell of the tenth embodiment of the present invention.Shown in figure 13, according to the solar battery cell 190 of present embodiment and different being, a line L is provided with a plurality of sensitive surface alignment mark 6J according to the solar battery cell 100 (referring to Fig. 1) of first embodiment; Each sensitive surface alignment mark 6J is different from sensitive surface alignment mark 6A on the arrangement pattern of the part of alignment mark.
A line L is provided with a plurality of (for example, two) sensitive surface alignment mark 6J.For example, sensitive surface alignment mark 6J is separately positioned on the right side and left side of line L.Width W a between sensitive surface alignment mark 6J and the 6J is equal to, or greater than the width W c (that is the width of electroconductive adhesive films 5) of adhesion area SF.The part 61J that sensitive surface alignment mark 6J has a sensitive surface alignment mark 6J wherein along line L by the pattern of arranging continuously; Various piece 61J crosses over two adjacent finger electrodes 3,3, so that finger electrode 3,3 is linked together.In addition, among the sensitive surface alignment mark 6J and 6J on right side that is set up online L respectively and left side, the part 61J of a sensitive surface alignment mark 6J is interlocked with respect to the part 61J of another sensitive surface alignment mark 6J.Thereby, sensitive surface alignment mark 6J and 6J setting interlaced with each other.In addition, be arranged with staggered mode owing to cross over the part 61J of two adjacent finger electrodes 3,3 separately, so all finger electrodes 3 are bonded to together through sensitive surface alignment mark 6J, 6J.
Certainly, the solar battery cell 190 of configuration produces and the same effect of effect according to the solar battery cell 100 of first embodiment as stated.
In addition, in solar battery cell 190, because a line L is provided with a plurality of (for example, two) sensitive surface alignment mark 6J, so alignment mark can allow TAB line 4 accurately to be connected to the position of wanting more easily by visually identification.
In addition, in solar battery cell 190, a plurality of (for example, two) sensitive surface alignment mark 6J that line L is provided with, the width W a between the 6J are equal to, or greater than the width W c of electroconductive adhesive films 5.Thereby electroconductive adhesive films 5 can be applied between sensitive surface alignment mark 6J and the 6J, so that sensitive surface alignment mark 6J, 6J can be by visually identifications after the applying of electroconductive adhesive films 5.Therefore, TAB line 4 can be connected to the position of wanting more accurately.
In addition, in solar battery cell 190, to a plurality of sensitive surface alignment mark 6J and the 6J setting interlaced with each other of a line L setting.Thereby alignment mark can allow TAB line 4 accurately to be connected to the position of wanting more easily by visually identification.
In addition, in solar battery cell 190, be arranged with staggered mode owing to cross over the part 61J of two adjacent finger electrodes 3,3 separately, so all finger electrodes 3 are bonded to together through sensitive surface alignment mark 6J, 6J.The sensitive surface alignment mark 6J that so disposes helps to simplify the inspection of broken string to finger electrode 3 or the like.That is to say that in this structure, all finger electrodes 3 form a set.Thereby, when probe touches this set, can check all finger electrodes 3 at every turn.Therefore, check that the number of required probe can be reduced, can reduce the inspection cost.
Now, with the solar battery cell of describing according to the 11st embodiment of the present invention.With the difference of mainly describing the present embodiment and first embodiment.
Figure 14 is the plane graph of demonstration according to the front of the solar battery cell of the 11st embodiment of the present invention.Shown in figure 14, according to the solar battery cell 200 of present embodiment and different being, a line L is provided with a plurality of sensitive surface alignment mark 6K according to the solar battery cell 100 (referring to Fig. 1) of first embodiment; Each sensitive surface alignment mark 6K is different from sensitive surface alignment mark 6A on the arrangement pattern of the part of alignment mark.
A line L is provided with a plurality of (for example, two) sensitive surface alignment mark 6K.For example, sensitive surface alignment mark 6K is separately positioned on the right side and left side of line L.Width W a between sensitive surface alignment mark 6K and the 6K is equal to, or greater than the width W c (that is the width of electroconductive adhesive films 5) of adhesion area SF.Sensitive surface alignment mark 6K have wherein part 61K and part 62K along line L by alternately and the pattern of arranging continuously; Various piece 61K only intersects with a finger electrode 3, and various piece 62K crosses over two adjacent finger electrodes 3,3, so that finger electrode 3,3 is linked together.
Certainly, the solar battery cell 200 of configuration produces and the same effect of effect according to the solar battery cell 100 of first embodiment as stated.
In addition, in solar battery cell 200, the various piece 62K of sensitive surface alignment mark 6K crosses over two finger electrodes 3,3.The sensitive surface alignment mark 6K that so disposes helps to simplify the inspection of broken string to finger electrode 3 or the like.That is to say that in this structure, a plurality of finger electrodes 3 that the various piece 62K of sensitive surface alignment mark 6K crosses over form a set.Thereby, when probe touches this set, can check a plurality of finger electrodes 3 at every turn.Therefore, check that the number of required probe can be reduced, can reduce the inspection cost.
In addition, in solar battery cell 200, because a line L is provided with a plurality of (for example, two) sensitive surface alignment mark 6K, so alignment mark can allow TAB line 4 accurately to be connected to the position of wanting more easily by visually identification.
In addition, in solar battery cell 200, a plurality of (for example, two) sensitive surface alignment mark 6K that line L is provided with, the width W a between the 6K are equal to, or greater than the width W c of electroconductive adhesive films 5.Thereby electroconductive adhesive films 5 can be applied between sensitive surface alignment mark 6K and the 6K, so that sensitive surface alignment mark 6K, 6K can be by visually identifications after the applying of electroconductive adhesive films 5.Therefore, TAB line 4 can be connected to the position of wanting more accurately.
Now, with the solar battery cell of describing according to the 12nd embodiment of the present invention.With the difference of mainly describing the present embodiment and first embodiment.
Figure 15 is the plane graph of demonstration according to the front of the solar battery cell of the 12nd embodiment of the present invention.Shown in figure 15, according to the solar battery cell 210 of present embodiment and different being, a line L is provided with a plurality of sensitive surface alignment mark 6L according to the solar battery cell 100 (referring to Fig. 1) of first embodiment; Each sensitive surface alignment mark 6L is different from sensitive surface alignment mark 6A on the arrangement pattern of the part of alignment mark.
A line L is provided with a plurality of (for example, two) sensitive surface alignment mark 6L.For example, sensitive surface alignment mark 6L is separately positioned on the right side and left side of line L.Width W a between sensitive surface alignment mark 6L and the 6L is equal to, or greater than the width W c (that is the width of electroconductive adhesive films 5) of adhesion area SF.The part 61L that sensitive surface alignment mark 6L has a sensitive surface alignment mark 6L wherein along line L by the pattern of arranging continuously; Various piece 61L crosses over two adjacent finger electrodes 3,3, so that finger electrode 3,3 is linked together.In addition, among the sensitive surface alignment mark 6L and 6L on right side that is set up online L respectively and left side, the part 61L of a sensitive surface alignment mark 6L is interlocked with respect to the part 61L of another sensitive surface alignment mark 6L.Thereby, sensitive surface alignment mark 6L and 6L setting interlaced with each other.In addition, be arranged with staggered mode owing to cross over the part 61L of two adjacent finger electrodes 3,3 separately, so all finger electrodes 3 are bonded to together through sensitive surface alignment mark 6L, 6L.
Certainly, the solar battery cell 210 of configuration produces and the same effect of effect according to the solar battery cell 100 of first embodiment as stated.
In addition, in solar battery cell 210, because a line L is provided with a plurality of (for example, two) sensitive surface alignment mark 6L, 6L, so alignment mark can allow TAB line 4 accurately to be connected to the position of wanting more easily by visually identification.
In addition, in solar battery cell 210, a plurality of (for example, two) sensitive surface alignment mark 6L that line L is provided with, the width W a between the 6L are equal to, or greater than the width W c of electroconductive adhesive films 5.Thereby electroconductive adhesive films 5 can be applied between sensitive surface alignment mark 6L and the 6L, so that sensitive surface alignment mark 6L, 6L can be by visually identifications after the applying of electroconductive adhesive films 5.Therefore, TAB line 4 can be connected to the position of wanting more accurately.
In addition, in solar battery cell 210, to a plurality of sensitive surface alignment mark 6L and the 6L setting interlaced with each other of a line L setting.Thereby alignment mark can allow TAB line 4 accurately to be connected to the position of wanting more easily by visually identification.
In addition, in solar battery cell 210, be arranged with staggered mode owing to cross over the part 61L of two adjacent finger electrodes 3,3 separately, so all finger electrodes 3 are bonded to together through sensitive surface alignment mark 6L, 6L.The sensitive surface alignment mark 6L that so disposes helps to simplify the inspection of broken string to finger electrode 3 or the like.That is to say that in this structure, all finger electrodes 3 form a set.Thereby, when probe touches this set, can check all finger electrodes 3 at every turn.Therefore, check that the number of required probe can be reduced, can reduce the inspection cost.
Now, with the solar battery cell of describing according to the 13rd embodiment of the present invention.With the difference of mainly describing the present embodiment and first embodiment.
Figure 16 is the plane graph of demonstration according to the front of the solar battery cell of the 13rd embodiment of the present invention.Shown in figure 16, according to the solar battery cell 220 of present embodiment and different being, a line L is provided with sensitive surface alignment mark 6M and 6N according to the solar battery cell 100 (referring to Fig. 1) of first embodiment; Each sensitive surface alignment mark 6M and 6N are different from sensitive surface alignment mark 6A on the arrangement pattern of the part of alignment mark.
A line L is provided with sensitive surface alignment mark 6M and 6N.For example, sensitive surface alignment mark 6M and 6N are separately positioned on the right side and left side of line L.Width W a between sensitive surface alignment mark 6M and the 6N is equal to, or greater than the width W c (that is the width of electroconductive adhesive films 5) of adhesion area SF.The part 61M that sensitive surface alignment mark 6M has a sensitive surface alignment mark 6M wherein along line L by the pattern of arranging continuously; Various piece 61M crosses over one group of four adjacent finger electrode 3 to 3, so that connect two finger electrodes of four finger electrodes 3 at the two ends that are arranged in this group.A finger electrode 3 that is not connected with any part 61M is inserted between continuous the part 61M and 61M.The part 61N that sensitive surface alignment mark 6N has a sensitive surface alignment mark 6N wherein along line L by the pattern of arranging continuously; Various piece 61N crosses over one group of three adjacent finger electrode 3 to 3, so that connect two finger electrodes of three finger electrodes 3 at the two ends that are arranged in this group.Two finger electrodes 3 that are not connected with any part 61N are inserted between continuous the part 61N and 61N.In addition, among the sensitive surface alignment mark 6M and 6N on right side that is set up online L respectively and left side, the part 61M of sensitive surface alignment mark 6M is interlocked with respect to the part 61N of sensitive surface alignment mark 6N.Thereby, sensitive surface alignment mark 6M and 6N setting interlaced with each other.In addition, be arranged with staggered mode owing to cross over the part 61M and the 61N of a plurality of finger electrodes 3,3 separately, so all finger electrodes 3 are bonded to together through sensitive surface alignment mark 6M and 6N.
Certainly, the solar battery cell 220 of configuration produces and the same effect of effect according to the solar battery cell 100 of first embodiment as stated.
In addition, in solar battery cell 220, because a line L is provided with a plurality of sensitive surface alignment mark 6M and 6N, so alignment mark can allow TAB line 4 accurately to be connected to the position of wanting more easily by visually identification.
In addition, in solar battery cell 220, the width W c that a plurality of sensitive surface alignment mark 6M that line L is provided with and the width W a between the 6N are equal to, or greater than electroconductive adhesive films 5.Thereby electroconductive adhesive films 5 can be applied between sensitive surface alignment mark 6M and the 6N, so that sensitive surface alignment mark 6M and 6N can be by visually identifications after the applying of electroconductive adhesive films 5.Therefore, TAB line 4 can be connected to the position of wanting more accurately.
In addition, in solar battery cell 220, to a plurality of sensitive surface alignment mark 6M and the 6N setting interlaced with each other of a line L setting.Thereby alignment mark can allow TAB line 4 accurately to be connected to the position of wanting more easily by visually identification.
In addition, in solar battery cell 220, be arranged with the mode of interlocking with 61N owing to cross over the part 61M of a plurality of adjacent finger electrodes 3 separately, so all finger electrodes 3 are bonded to together through sensitive surface alignment mark 6M and 6N.Sensitive surface alignment mark 6M that so disposes and 6N help to simplify the inspection of broken string to finger electrode 3 or the like.That is to say that in this structure, all finger electrodes 3 form a set.Thereby, when probe touches this set, can check all finger electrodes 3 at every turn.Therefore, check that the number of required probe can be reduced, can reduce the inspection cost.
Now, with the solar battery cell of describing according to the 14th embodiment of the present invention.With the difference of mainly describing the present embodiment and first embodiment.
Figure 17 is the plane graph of demonstration according to the front of the solar battery cell of the 14th embodiment of the present invention.Shown in figure 17, according to the solar battery cell 230 of present embodiment and different being, a line L is provided with a plurality of sensitive surface alignment mark 6O according to the solar battery cell 100 (referring to Fig. 1) of first embodiment; Each sensitive surface alignment mark 6O is different from sensitive surface alignment mark 6A on the arrangement pattern of the part of alignment mark.
A line L is provided with a plurality of (for example, two) sensitive surface alignment mark 6O.For example, sensitive surface alignment mark 6O is separately positioned on the right side and left side of line L.Width W a between sensitive surface alignment mark 6O and the 6O is equal to, or greater than the width W c (that is the width of electroconductive adhesive films 5) of adhesion area SF.The part 61O that sensitive surface alignment mark 6O has a sensitive surface alignment mark 6O wherein along line L by the pattern of arranging continuously; Various piece 61O crosses over one group of three adjacent finger electrode 3 to 3, so that intersect with finger electrode 3 to 3.A finger electrode 3 that is not connected with any part 61O is inserted between continuous the part 61O and 61O.In addition, among the sensitive surface alignment mark 6O and 6O on right side that is set up online L respectively and left side, the part 61O on right side is interlocked with respect to the part 61O in left side, and sensitive surface alignment mark 6O and 6O setting interlaced with each other.In addition, be arranged with staggered mode owing to cross over the part 61O of three adjacent finger electrodes 3 to 3 separately, so all finger electrodes 3 are bonded to together through sensitive surface alignment mark 6O, 6O.
Certainly, the solar battery cell 230 of configuration produces and the same effect of effect according to the solar battery cell 100 of first embodiment as stated.
In addition, in solar battery cell 230, because a line L is provided with a plurality of (for example, two) sensitive surface alignment mark 6O, so alignment mark can allow TAB line 4 accurately to be connected to the position of wanting more easily by visually identification.
In addition, in solar battery cell 230, the width W c that a plurality of (for example, two) sensitive surface alignment mark 6O that line L is provided with and the width W a between the 6O are equal to, or greater than electroconductive adhesive films 5.Thereby electroconductive adhesive films 5 can be applied between sensitive surface alignment mark 6O and the 6O, so that sensitive surface alignment mark 6O, 6O can be by visually identifications after the applying of electroconductive adhesive films 5.Therefore, TAB line 4 can be connected to the position of wanting more accurately.
In addition, in solar battery cell 230, to a plurality of sensitive surface alignment mark 6O and the 6O setting interlaced with each other of a line L setting.Thereby alignment mark can allow TAB line 4 accurately to be connected to the position of wanting more easily by visually identification.
In addition, in solar battery cell 230, be arranged with staggered mode owing to cross over the part 61O of three adjacent finger electrodes 3 to 3 separately, so all finger electrodes 3 are bonded to together through sensitive surface alignment mark 6O, 6O.The sensitive surface alignment mark 6O that so disposes helps to simplify the inspection of broken string to finger electrode 3 or the like.That is to say that in this structure, all finger electrodes 3 form a set.Thereby, when probe touches this set, can check all finger electrodes 3 at every turn.Therefore, check that the number of required probe can be reduced, can reduce the inspection cost.
Now, with the solar battery cell of describing according to the 15th embodiment of the present invention.With the difference of mainly describing the present embodiment and first embodiment.
Figure 18 is the plane graph of demonstration according to the front of the solar battery cell of the 15th embodiment of the present invention.Shown in figure 18, according to the solar battery cell 240 of present embodiment and different being, a line L is provided with a plurality of sensitive surface alignment mark 6P according to the solar battery cell 100 (referring to Fig. 1) of first embodiment; Each sensitive surface alignment mark 6P is different from sensitive surface alignment mark 6A on the arrangement pattern of the part of alignment mark.
A line L is provided with a plurality of (for example, two) sensitive surface alignment mark 6P.For example, sensitive surface alignment mark 6P is separately positioned on the right side and left side of line L.Width W a between sensitive surface alignment mark 6P and the 6P is equal to, or greater than the width W c (that is the width of electroconductive adhesive films 5) of adhesion area SF.The part 61P that sensitive surface alignment mark 6P has a sensitive surface alignment mark 6P wherein along line L by the pattern of arranging continuously; Various piece 61P crosses over one group of three adjacent finger electrode 3 to 3, so that connect two finger electrodes of three finger electrodes 3 at the two ends that are arranged in this group.A finger electrode 3 that is not connected with any part 61P is inserted between continuous the part 61P and 61P.In addition, among the sensitive surface alignment mark 6P and 6P on right side that is set up online L respectively and left side, the part 61P on right side is interlocked with respect to the part 61P in left side, and sensitive surface alignment mark 6P and 6P setting interlaced with each other.In addition, be arranged with staggered mode owing to cross over the part 61P of three adjacent finger electrodes 3 to 3 separately, so all finger electrodes 3 are bonded to together through sensitive surface alignment mark 6P, 6P.
Certainly, the solar battery cell 240 of configuration produces and the same effect of effect according to the solar battery cell 100 of first embodiment as stated.
In addition, in solar battery cell 240, because a line L is provided with a plurality of (for example, two) sensitive surface alignment mark 6P, so alignment mark can allow TAB line 4 accurately to be connected to the position of wanting more easily by visually identification.
In addition, in solar battery cell 240, the width W c that a plurality of (for example, two) sensitive surface alignment mark 6P that line L is provided with and the width W a between the 6P are equal to, or greater than electroconductive adhesive films 5.Thereby electroconductive adhesive films 5 can be applied between sensitive surface alignment mark 6P and the 6P, so that sensitive surface alignment mark 6P, 6P can be by visually identifications after the applying of electroconductive adhesive films 5.Therefore, TAB line 4 can be connected to the position of wanting more accurately.
In addition, in solar battery cell 240, to a plurality of sensitive surface alignment mark 6P and the 6P setting interlaced with each other of a line L setting.Thereby alignment mark can allow TAB line 4 accurately to be connected to the position of wanting more easily by visually identification.
In addition, in solar battery cell 240, be arranged with staggered mode owing to cross over the part 61P of three adjacent finger electrodes 3 to 3 separately, so all finger electrodes 3 are bonded to together through sensitive surface alignment mark 6P, 6P.The sensitive surface alignment mark 6P that so disposes helps to simplify the inspection of broken string to finger electrode 3 or the like.That is to say that in this structure, all finger electrodes 3 form a set.Thereby, when probe touches this set, can check all finger electrodes 3 at every turn.Therefore, check that the number of required probe can be reduced, can reduce the inspection cost.
Now, with the solar battery cell of describing according to the 16th embodiment of the present invention.With the difference of mainly describing the present embodiment and first embodiment.
Figure 19 is the plane graph of demonstration according to the front of the solar battery cell of the 16th embodiment of the present invention.Shown in figure 19, according to the solar battery cell 250 of present embodiment and different being, a line L is provided with sensitive surface alignment mark 6Q and 6R according to the solar battery cell 100 (referring to Fig. 1) of first embodiment; Each sensitive surface alignment mark 6Q and 6R are different from sensitive surface alignment mark 6A on the arrangement pattern of the part of alignment mark.
A line L is provided with sensitive surface alignment mark 6Q and 6R.For example, sensitive surface alignment mark 6Q and 6R are separately positioned on right side and the left side of line L.Width W a between sensitive surface alignment mark 6Q and the 6R is equal to, or greater than the width W c (that is the width of electroconductive adhesive films 5) of adhesion area SF.The part 61Q that sensitive surface alignment mark 6Q has a sensitive surface alignment mark 6Q wherein along line L by the pattern of arranging continuously; Various piece 61Q crosses over one group of three adjacent finger electrode 3 to 3, so that intersect with finger electrode 3 to 3.Two finger electrodes 3 that are not connected with any part 61Q are inserted between continuous the part 61Q and 61Q.The part 61R that sensitive surface alignment mark 6R has a sensitive surface alignment mark 6R wherein along line L by the pattern of arranging continuously; Various piece 61R crosses over one group of four adjacent finger electrode 3 to 3, so that connect two finger electrodes of four finger electrodes 3 at the two ends that are arranged in this group.A finger electrode 3 that is not connected with any part 61R is inserted between continuous the part 61R and 61R.In addition, among the sensitive surface alignment mark 6Q and 6R on right side that is set up online L respectively and left side, part 61Q is interlocked with respect to part 61R, and sensitive surface alignment mark 6Q and 6R setting interlaced with each other.In addition, be arranged with staggered mode owing to cross over the part 61Q and the 61R of a plurality of finger electrodes 3 to 3 separately, so all finger electrodes 3 are bonded to together through sensitive surface alignment mark 6Q and 6R.
Certainly, the solar battery cell 250 of configuration produces and the same effect of effect according to the solar battery cell 100 of first embodiment as stated.
In addition, in solar battery cell 250, because a line L is provided with a plurality of sensitive surface alignment mark 6Q and 6R, so alignment mark can allow TAB line 4 accurately to be connected to the position of wanting more easily by visually identification.
In addition, in solar battery cell 250, the width W c that a plurality of sensitive surface alignment mark 6Q that line L is provided with and the width W a between the 6R are equal to, or greater than electroconductive adhesive films 5.Thereby electroconductive adhesive films 5 can be applied between sensitive surface alignment mark 6Q and the 6R, so that sensitive surface alignment mark 6Q and 6R can be by visually identifications after the applying of electroconductive adhesive films 5.Therefore, TAB line 4 can be connected to the position of wanting more accurately.
In addition, in solar battery cell 250, to a plurality of sensitive surface alignment mark 6Q and the 6R setting interlaced with each other of a line L setting.Thereby alignment mark can allow TAB line 4 accurately to be connected to the position of wanting more easily by visually identification.
In addition, in solar battery cell 250, be arranged with the mode of interlocking with 61R owing to cross over the part 61Q of a plurality of adjacent finger electrodes 3 separately, so all finger electrodes 3 are bonded to together through sensitive surface alignment mark 6Q and 6R.Sensitive surface alignment mark 6Q that so disposes and 6R help to simplify the inspection of broken string to finger electrode 3 or the like.That is to say that in this structure, all finger electrodes 3 form a set.Thereby, when probe touches this set, can check all finger electrodes 3 at every turn.Therefore, check that the number of required probe can be reduced, can reduce the inspection cost.
Now, with the solar battery cell of describing according to the 17th embodiment of the present invention.With the difference of mainly describing the present embodiment and first embodiment.
Figure 20 is the plane graph of demonstration according to the front of the solar battery cell of the 17th embodiment of the present invention.Shown in figure 20; According to the solar battery cell 260 of present embodiment and different being according to the solar battery cell 100 (referring to Fig. 1) of first embodiment; Solar battery cell 260 comprises sensitive surface alignment mark 6S; Each sensitive surface alignment mark 6S has the part 61S at the two ends that are arranged on sensitive surface, and each sensitive surface alignment mark 6S connect the end be positioned at all finger electrodes 3 of this group finger electrode 3 and with the finger electrode 3 of finger electrode 3 adjacency of the end that is positioned at this group.
Certainly, the solar battery cell 260 of configuration produces and the same effect of effect according to the solar battery cell 100 of first embodiment as stated.
In addition, in solar battery cell 260, sensitive surface alignment mark 6S comprises part 61S, various piece 61S connect the end be positioned at all finger electrodes 3 of this group finger electrode 3 and with the finger electrode 3 of the finger electrode that is positioned at this group end 3 adjacency.Thereby, can suppress the possible increase on the consumption of electrode material further, make that the increase on the production cost can be limited.
When having understood above-described content; Can produce according to solar battery cell of the present invention through a kind of method; This method comprises: setting has the photovoltaic substrate that is arranged in a plurality of finger electrodes on its sensitive surface; Sensitive surface has the zone of preset width, to hold the electroconductive binder that has same widths with this zone; And in this zone or be adjacent to this location; The alignment mark of the link position when indicating the TAB line to be connected on the finger electrode by electroconductive binder is set; Alignment mark has along line and is arranged on the part on the sensitive surface discontinuously; This line intersects with two finger electrodes that are arranged near the finger electrode at the two ends of said sensitive surface, before a plurality of finger electrodes are formed on the sensitive surface or after alignment mark is set.
Further, can produce solar module of the present invention through a kind of method, this method comprises: 1) be provided with a plurality of according to solar battery cell of the present invention; 2) the TAB line is positioned on the solar battery cell in a plurality of solar battery cells along alignment mark, and the TAB line is connected to the finger electrode of a said solar battery cell by electroconductive binder; And 3) the TAB line is connected to the backplate on the back side that is formed on another solar battery cell in a plurality of solar battery cells; Wherein can be with arbitrary order execution in step 2) and 3.
Specifically described preferred embodiment according to solar battery cell of the present invention.But the present invention is not limited to the embodiment of above description.For example, in the above-described embodiments, backplate 7 is connected to TAB line 4 by electroconductive adhesive films 5.But; The busbar electrode that is formed by Ag etc. can be set at the position on the backplate 7; TAB line 4 will be connected to backplate 7, so that backplate 7 can be connected electrically in together through with scolding tin the busbar electrode being connected to TAB line 4 with TAB line 4.
In addition, in the foregoing description, membranaceous electroconductive adhesive films 5 is used as electroconductive binder.But, electroconductive binder that can using liquid.
In the above-described embodiments, the sensitive surface alignment mark can be formed by the material material different with finger electrode.As the material that is used for the sensitive surface alignment mark, for example,, can reduce production costs through adopting the material more cheap than the material that is used for finger electrode.Should be noted that material different comprises the material of the identical component that contains heterogeneity or different content ratio.
Equally, in the above-described embodiments,, for example, can adopt this form shown in Figure 21 as the sensitive surface alignment mark.Sensitive surface alignment mark 6T shown in Figure 21 is the dotted line that forms pattern, and wherein part 61T and part 62T are positioned with the order that replaces, and the length of part 62T L along the line is shorter than part 61T.Should be noted that and to locate a plurality of part 61T continuously and can locate a plurality of part 62T continuously.
In addition; In the above-described embodiments; As solar battery cell; Especially, have monocrystalline silicon substrate those solar battery cells, have polycrystalline silicon substrate those solar battery cells, or those solar battery cells with substrate of monocrystalline silicon and amorphous silicon lamination wherein (HIT that for example, is produced by Panasonic Electric Equipment Industrial Co.,Ltd is serial) be preferable.
Equally, in the above-described embodiments, be used for the material of finger electrode, except above-mentioned material, comprise that alloy comprises at least one in silver, aluminium and the copper such as the glass cream that comprises aluminium, the material that comprises the glass cream of copper and comprise the glass cream of alloy.Be suitable for the material of the sensitive surface alignment mark in the foregoing description equally.
In addition, in the above-described embodiments, the live width of the various piece of sensitive surface alignment mark more preferably is 0.10mm and 0.18mm at least at the most.
Equally, in the above-described embodiments,, but also can be other numbers (for example, 3 to 5) even the number of adhesion area SF (number of TAB line) is described to 2.
In addition, the number of the finger electrode that partly intersects with each sensitive surface alignment mark is preferably 2, more preferably is more than 2 and is no more than 20, and be more than 2 best and be no more than 10.In addition, the number of the finger electrode that intersects with the various piece of sensitive surface alignment mark needn't be all identical in each part, and can be different to each part.
Equally, finger electrode needs not to be linearity.

Claims (19)

1. a solar battery cell is characterized in that, comprising:
Be arranged in a plurality of finger electrodes on the sensitive surface of photovoltaic substrate; With
The alignment mark of the link position when indication TAB line is connected on the said finger electrode by electroconductive binder; Said alignment mark has along line and is arranged on the part on the said sensitive surface discontinuously, and said line intersects with two finger electrodes that are arranged near the said finger electrode at the two ends of said sensitive surface.
2. solar battery cell as claimed in claim 1 is characterized in that:
Each alignment mark part is formed by the material identical materials with said finger electrode, and each alignment mark part further has the live width of the live width that is equal to or less than said TAB line.
3. solar battery cell as claimed in claim 1 is characterized in that:
Each alignment mark part is formed by the material material different with said finger electrode, and each alignment mark part further has the live width of the live width that is equal to or less than said TAB line.
4. solar battery cell as claimed in claim 2 is characterized in that:
Each alignment mark part is integrally formed with at least one the corresponding finger electrode in the said finger electrode.
5. according to any one of claims 1 to 4 solar battery cell is characterized in that said alignment mark is discontinuous being roughly parallel on the direction of said line, and said two finger electrodes in said line and the said finger electrode intersect.
6. according to any one of claims 1 to 4 solar battery cell is characterized in that said alignment mark is discontinuous being approximately perpendicular on the direction of said line, and said two finger electrodes in said line and the said finger electrode intersect.
7. according to any one of claims 1 to 4 solar battery cell is characterized in that said alignment mark comprises dotted line.
8. according to any one of claims 1 to 4 solar battery cell is characterized in that the various piece of said alignment mark is intersected with a plurality of said finger electrodes.
9. according to any one of claims 1 to 4 solar battery cell is characterized in that, the number of the said finger electrode that intersects with the various piece of said alignment mark is more than 2 and is no more than 20.
10. according to any one of claims 1 to 4 solar battery cell is characterized in that, the number of the said finger electrode that intersects with the various piece of said alignment mark is more than 2 and is no more than 10.
11. solar battery cell according to any one of claims 1 to 4 is characterized in that, said alignment mark comprises along a plurality of elongated straight line portion of single straight line location.
12. solar battery cell according to any one of claims 1 to 4 is characterized in that, said alignment mark comprises the part of setting interlaced with each other.
13. solar battery cell according to any one of claims 1 to 4 is characterized in that, said alignment mark part localized area, and said zone has the width of the width that is equal to, or greater than said electroconductive binder.
14. solar battery cell according to any one of claims 1 to 4 is characterized in that, the various piece of said alignment mark has the width of the width that is equal to or less than a finger electrode in the said finger electrode.
15. solar battery cell according to any one of claims 1 to 4 is characterized in that, the various piece of said alignment mark has 0.05mm and the width of 0.2mm at least at the most.
16. solar battery cell according to any one of claims 1 to 4 is characterized in that, the various piece of said alignment mark has 0.10mm and the width of 0.18mm at least at the most.
17. solar battery cell according to any one of claims 1 to 4 is characterized in that:
Monocrystalline silicon substrate, polycrystalline silicon substrate, or wherein the substrate of monocrystalline silicon and amorphous silicon lamination be used as said substrate.
18. solar battery cell according to any one of claims 1 to 4 is characterized in that:
The number of said TAB line is 2.
19. solar battery cell according to any one of claims 1 to 4 is characterized in that:
The number of said TAB line is 3 to 5.
CN201210060091.9A 2011-03-08 2012-03-08 Solar cell Expired - Fee Related CN102683459B (en)

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