CN102810530A - Solar battery cell - Google Patents
Solar battery cell Download PDFInfo
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- CN102810530A CN102810530A CN2012101779894A CN201210177989A CN102810530A CN 102810530 A CN102810530 A CN 102810530A CN 2012101779894 A CN2012101779894 A CN 2012101779894A CN 201210177989 A CN201210177989 A CN 201210177989A CN 102810530 A CN102810530 A CN 102810530A
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- Prior art keywords
- solar battery
- battery cell
- back side
- alignment mark
- tab line
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- 239000011521 glass Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
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- MRNHPUHPBOKKQT-UHFFFAOYSA-N indium;tin;hydrate Chemical compound O.[In].[Sn] MRNHPUHPBOKKQT-UHFFFAOYSA-N 0.000 description 3
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/544—Marks applied to semiconductor devices or parts, e.g. registration marks, alignment structures, wafer maps
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- 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
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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
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1876—Particular processes or apparatus for batch treatment of the devices
- H01L31/188—Apparatus specially adapted for automatic interconnection of solar cells in a module
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2223/00—Details relating to semiconductor or other solid state devices covered by the group H01L23/00
- H01L2223/544—Marks applied to semiconductor devices or parts
- H01L2223/54426—Marks applied to semiconductor devices or parts for alignment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2223/00—Details relating to semiconductor or other solid state devices covered by the group H01L23/00
- H01L2223/544—Marks applied to semiconductor devices or parts
- H01L2223/54473—Marks applied to semiconductor devices or parts for use after dicing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
A solar battery cell comprises: a substrate; a plurality of finger electrodes formed on the light receiving surface of the substrate; and a back side electrode sufficiently covering the back side of the substrate and connected to the finger electrodes on an adjacent cell by bonding a first TAB wire through a conductive adhesive. The back side electrode has an omitted portion arranged so as to define at least one alignment mark indicating a position at which the first TAB wire is bonded, and the at least one alignment mark has a width smaller than the width of the first TAB wire.
Description
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 the C with about 220 °.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 electrically conducting adhesive with conductive adhesive layer 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).Electrically conducting adhesive 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 electrically conducting adhesive is used to connect the TAB line, then this connection can be performed below the C at 200 °.This change of reduction and solar battery cell of rate of finished products that has suppressed Connection Step is curved.In addition, if electrically conducting adhesive 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 straight line of solar battery cell maybe be crooked.So, residual stress possibly produced in solar battery cell, and fabrication yield possibly reduce.In this case, the additional alignment mark that is used to aim at can be formed on the bonding location of expection.Yet the step that forms the complicacy of alignment mark has increased manufacturing cost.
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 can accurately be connected to the position of expection, allows to suppress the possible increase on the production cost simultaneously.
Summary of the invention
According to its notion widely; The present invention provides a kind of solar battery cell; Comprise substrate, be formed on the backplate at the back side of a plurality of finger electrodes and covered substrate on the sensitive surface of substrate, through apply a TAB line by electrically conducting adhesive, backplate is connected to a plurality of finger electrodes on the adjacent unit; Wherein, With said sensitive surface on corresponding position, the position that will apply said the 2nd TAB line, the part at the said back side of said substrate is exposed, and this exposed portions serve constitutes the alignment mark that applies the position that is used to indicate a TAB line at the back side.
Its notion widely according to another; The present invention provides a kind of solar battery cell; Comprise substrate, be formed on the backplate at the back side of a plurality of finger electrodes and covered substrate on the sensitive surface of substrate, through apply a TAB line by electrically conducting adhesive, backplate is connected to a plurality of finger electrodes on the adjacent unit; Wherein, Backplate has the clipped that is arranged as at least one alignment mark of qualification, the position that at least one alignment mark indicates a TAB line to be applied in, and at least one alignment mark has the width littler than the width of a said TAB line.
In aspect its one; Solar battery cell of the present invention comprises substrate, be formed on the parallel a plurality of finger electrodes on the sensitive surface of substrate and spread all over the backplate that the back side of whole base plate forms, and through apply the TAB line by electrically conducting adhesive, backplate is connected to a plurality of finger electrodes on the adjacent unit; Wherein, Exposed portions serve is formed on the back side, so, substrate from sensitive surface on the exposed portions serve that is associated of the position that will be connected the TAB line exposed; And exposed portions serve is corresponding to the alignment mark (run through specification, be called as alignment mark or mark equally) of indicating the position that will connect the TAB line of going up overleaf.
In solar battery cell according to the present invention; Exposed portions serve is formed on the back side; So; Substrate is from being exposed with the exposed portions serve that the position that will be connected the TAB line on sensitive surface is associated, and the alignment mark of the exposed portions serve position that will connect the TAB line of going up overleaf corresponding to indication.Therefore, the TAB line can be connected to the position of expection exactly.In addition, when backplate is formed,, can easily form alignment mark through avoiding electrode material is applied to the part corresponding to alignment mark at the back side.Therefore, can suppress increase in the production cost.
Here, preferably, alignment mark is the shape of line-like, the little live width of TAB line that has than will connects.This causes the enough bonding regions between TAB line and the substrate, and the TAB line with enough mechanical connection intensity is provided.
In addition; Preferably; Alignment mark becomes the shape of line-like; The part that the live width of the TAB line that this straight line comprises than will connects is little and equating with the TAB line or the part bigger than the live width of TAB line, length than the little part of TAB line and length equates with the TAB line or than the big part of TAB line by alternately formation continuously.This causes the enough bonding regions between TAB line and the substrate, and in the live width with the TAB line equates perhaps than the big part of the live width of TAB line, the TAB line with higher mechanical connection intensity is provided.
In addition, preferably, alignment mark is the shape of similar dotted line.This causes the enough bonding regions between TAB line and the substrate, and the TAB line with enough mechanical connection intensity is provided in the exposed portions serve of substrate.
In addition, preferably, the place, end on the extended line of the TAB line that being positioned at of substrate will connect, alignment mark is the shape of similar shearing.This allows when backplate is formed, and the part corresponding to alignment mark at the back side can easily be provided with.Therefore, backplate can easily be formed.
In addition; The present invention provides a kind of solar module; Comprise a plurality of solar battery cells that are arranged in the solar module; Wherein, through the TAB line of arranging along alignment mark by electrically conducting adhesive, the finger electrode on the solar battery cell in the adjacent solar battery cell is connected to the backplate on another solar battery cell.
In solar module according to the present invention, the TAB line is connected to the position of expection exactly.These row that suppressed solar battery cell are crooked.Therefore, when making solar module, can suppress the residual stress in the solar battery cell.Therefore, can improve fabrication yield.
In addition; Solar module of the present invention comprises aforesaid a plurality of solar battery cells of the present invention; Wherein, Alignment mark on the solar battery cell of the one TAB line in a plurality of solar battery cells is positioned; And be connected to the backplate of a said solar battery cell by said electrically conducting adhesive, and a TAB line further is connected to a plurality of finger electrodes of another solar battery cell in a plurality of solar battery cells as the 2nd TAB line.
According to another notion widely; The present invention provides a kind of method of making solar module; This method comprises: photoelectric substrates is set; This photoelectric substrates has and is arranged in a plurality of finger electrodes on its sensitive surface and is arranged on the sensitive surface and indicates the 2nd TAB line will be connected to the backplate at the back side of alignment mark and covered substrate of the position of finger electrode by electrically conducting adhesive, and through apply a TAB line by electrically conducting adhesive, backplate is connected to a plurality of finger electrodes on the adjacent unit; Wherein, With sensitive surface on the corresponding position, said position that will apply the 2nd TAB line, the part at the back side of substrate is exposed, this exposed portions serve constitutes the alignment mark that indication will apply the position of a TAB line; And,, a TAB line is connected to backplate by electrically conducting adhesive in the position of indicating through the alignment mark at the back side.The alignment mark at the back side can become the shape of line-like, and has the width littler than the width of a TAB line.Alignment mark can have 20% to 80% width of the width of a TAB line.Alignment mark can be a straight line.The said alignment mark at the said back side can be a straight line; And have first and second portion; Said first has the width littler than the width of a said TAB line; Said second portion has the width of the said width that is equal to, or greater than said TAB line, and wherein, said first and said second portion can alternately be arranged along said alignment mark.Said first can have the length with the equal in length of said second portion, and more than one said first can be positioned at the periphery at the said back side of said substrate.Said first can have the length with the equal in length of said second portion, and more than one said second portion can be positioned at the periphery at the said back side of said substrate.Said first can have the length bigger than the length of said second portion.Said first can have the length littler than the length of said second portion.The alignment mark at the back side can be a straight line, and comprises first area and second area alternately, and wherein, in said first area, the said back side can be exposed, and in said second area, the said back side can be capped through said backplate.The first area can have 20% to 200% width of the width of a TAB line.Said first area can have the length of 0.5mm to 30mm.The exposed portions serve at the said back side of the periphery through being positioned at the said back side can constitute said alignment mark.The exposed portions serve of the shearing shape at the said back side of the periphery through being positioned at the said back side can constitute said alignment mark.Alignment mark can be triangular shaped.Alignment mark can be a rectangular shape.Alignment mark can be a semicircular in shape.
According to another notion widely of the present invention; A kind of method of making solar module comprises: photoelectric substrates is set; This photoelectric substrates has the backplate at the back side of a plurality of finger electrodes that are arranged on its sensitive surface and covered substrate, and through apply a TAB line by electrically conducting adhesive, backplate is connected to a plurality of finger electrodes on the adjacent unit; Wherein, Backplate has the clipped that is arranged as at least one alignment mark that limits the back side, the position that at least one alignment mark at the back side indicates a TAB line to be applied in, and at least one alignment mark at the back side has the width littler than the width of a said TAB line; And,, a TAB line is connected to backplate by electrically conducting adhesive in the position of indicating through the alignment mark at the back side.The alignment mark at the back side can become the shape of line-like, and has the width littler than the width of a TAB line.Alignment mark can have 20% to 80% width of the width of a TAB line.Alignment mark can be a straight line.The said alignment mark at the said back side can be a straight line; And have first and second portion; Said first has the width littler than the width of a said TAB line; Said second portion has the width of the said width that is equal to, or greater than said TAB line, and wherein, said first and said second portion are alternately arranged along said alignment mark.Said first can have the length with the equal in length of said second portion, and more than one said first can be positioned at the periphery at the said back side of said substrate.Said first can have the length with the equal in length of said second portion, and more than one said second portion can be positioned at the periphery at the said back side of said substrate.Said first can have the length bigger than the length of said second portion.Said first can have the length littler than the length of said second portion.The alignment mark at the back side can be a straight line, and comprises first area and second area alternately, and wherein, in said first area, the said back side can be exposed, and in said second area, the said back side can be capped through said backplate.The first area can have 20% to 200% width of the width of a TAB line.Said first area can have the length of 0.5mm to 30mm.The exposed portions serve at the said back side of the periphery through being positioned at the said back side can constitute said alignment mark.The exposed portions serve of the shearing shape at the said back side of the periphery through being positioned at the said back side can constitute said alignment mark.Alignment mark can be triangular shaped.Alignment mark can be a rectangular shape.Alignment mark can be a semicircular in shape.
The present invention can provide a kind of solar battery cell and relevant methodology, can make the TAB line be connected to the position of expection exactly, allows to suppress possible increase in the manufacturing cost simultaneously.
Description of drawings
Fig. 1 is the plane graph according to the sensitive surface of the solar battery cell of the first embodiment of the present invention;
Fig. 2 is the bottom view at the back side of the solar battery cell in the displayed map 1;
Fig. 3 is the stereogram that a plurality of solar battery cells in the displayed map 1 are joined together;
Fig. 4 is the schematic end view of Fig. 3;
Fig. 5 is the plane graph that shows the back side of solar battery cell according to a second embodiment of the present invention;
Fig. 6 is the plane graph at the back side that shows the solar battery cell of a third embodiment in accordance with the invention;
Fig. 7 is the plane graph at the back side that shows the solar battery cell of a fourth embodiment in accordance with the invention;
Fig. 8 is the plane graph that shows the back side of solar battery cell according to a fifth embodiment of the invention;
Fig. 9 is the plane graph that shows the back side of solar battery cell according to a sixth embodiment of the invention;
Figure 10 is the plane graph that shows the back side of solar battery cell according to a seventh embodiment of the invention;
Figure 11 is the sketch map that shows traditional measuring equipment;
Figure 12 is the sketch map that shows the probe of the measuring equipment that is used for Figure 11;
Figure 13 shows to be used for the sketch map according to the measuring equipment of solar battery cell of the present invention; And
Figure 14 is the sketch map that shows the probe of the measuring equipment that is used for Figure 13.
Embodiment
Below will describe in detail according to solar battery cell of the present invention and the preferred embodiment that is used to make this solar battery cell with reference to accompanying drawing.Components identical is represented by identical Reference numeral, and is omitted the description of 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 bottom view at the back side of the solar battery cell in the displayed map 1.Fig. 3 is the stereogram that a plurality of solar battery cells in the displayed map 1 are connected.Fig. 4 is the schematic end view of Fig. 3.
As shown in Figure 1, solar battery cell 100 is so so that a plurality of solar battery cell 100 in series is electrically connected to form a solar module perhaps parallelly connectedly.This solar battery cell 100 comprises substrate 2.Substrate 2 is square substantially 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 type 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 positioned in parallel within on the sensitive surface 21 and away from each other.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 each conductive adhesive film (electrically conducting adhesive) 5.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 material that conducts to form.The instance of the material of finger electrode 3 comprises the glass cream of argentiferous; Each self-contained a kind of conductive particle that has in polytype conductive particle is dispersed in silver paste, gold paste, carbon paste, nickel cream and the aluminium cream of adhesive resin wherein; And through the ITO that burns or deposition forms.In the middle of these materials, consider thermal endurance, conductivity, stability and cost, preferably use the glass cream of argentiferous.
Bonding region SF, SF are corresponding to the zone of the sensitive surface 21 that applies conductive adhesive film 5,5.The width wc of bonding region SF (that is the width of conductive adhesive film 5) for example is 1.2mm.Between bonding region SF and the SF for example is 62mm apart from dc.The width that in addition, be connected to the TAB line 4 of bonding region SF for example is 1.5mm and slightly greater than the width wc (that is the width of conductive adhesive film 5) of bonding region SF.The purpose of these sizes is following: when TAB line 4 is pressurized facing to the conductive adhesive film that puts on bonding region SF 5, suppresses conductive adhesive film 5 and between sensitive surface 21 and TAB line 4, stretch out.
Sensitive surface alignment mark 6,6 is arranged on the sensitive surface 21 along line L discontinuously, so that form dotted line; This line L intersects with the finger electrode that is positioned at the sensitive surface two ends 3,3.More specifically, each part 61 of the sensitive surface alignment mark 6 that only intersects with a finger electrode 3 is arranged on every on a finger electrode 3 continuously along this line L.Sensitive surface alignment mark 6 indication TAB lines 4 are connected to the position of finger electrode 3.For example, sensitive surface alignment mark 6 is disposed in the central part of bonding region SF.
Sensitive surface alignment mark 6 uses with the material identical materials and the finger electrode 3 of finger electrode 3 integrally formed.That is to say that sensitive surface alignment mark 6 is by the glass cream of argentiferous; Each self-contained a kind of conductive particle that has in various types of conductive particles is dispersed in silver paste, gold paste, carbon paste, nickel cream or the aluminium cream of adhesive resin wherein; The ITO that perhaps forms through burning or deposition forms.In the middle of these materials, consider thermal endurance, conductivity, stability and cost, preferably use the glass cream of argentiferous.Sensitive surface alignment mark 6 is formed in the formation of finger electrode 3.
Each part 61 of sensitive surface alignment mark 6 is 0.05mm and the live width of 0.2mm at least at the most, for example, is and live width according to the same 0.15mm of the finger electrode of present embodiment 3.That is to say that each part 61 of sensitive surface alignment mark 6 is equal to or less than the live width of finger electrode 3.When sensitive surface alignment mark 6 is at least during the 0.05mm live width, guarantee visual identification, allow sensitive surface alignment mark 6 to play the function of alignment mark.In addition, when sensitive surface alignment mark 6 is at the most during the 0.2mm live width, the use amount of electrode material can be reduced fully.In addition, when sensitive surface alignment mark 6 was equal to or less than the live width of finger electrode 3, the use amount of electrode material can be by further reduction.Alternatively, each part 61 of sensitive surface alignment mark 6 be preferably the TAB line that connects sensitive surface alignment mark 6 live width at the most 20%.Sensitive surface alignment mark 6, the distance between 6 be and bonding region SF, SF between the 62mm same apart from dc.
As shown in Figure 2, backplate 7 is formed on the back side 22 of whole solar cell unit 100.When forming solar module through a plurality of solar battery cells 100 are linked together, TAB line 4 is connected to backplate 7 (referring to Fig. 4) by conductive adhesive film 5.Backplate 7 for example is formed through sintered aluminium cream.
Bonding region SB, SB are corresponding to the zone at the back side that applies conductive adhesive film 5 22.Bonding region SB, SB are positioned with the bonding region SF of sensitive surface 21 relatedly.The width of bonding region SB for example is the same 1.2mm of width wc (referring to Fig. 1) with bonding region SF.Distance between bonding region SB and the SB for example be and bonding region SF and SF between the about 62mm same apart from dc (referring to Fig. 1).In addition, the width that be connected to the TAB line 4 of bonding region SB for example is the same 1.5mm of width with the TAB line that will be connected to sensitive surface 21, and slightly greater than the width of bonding region SB.
Exposing on exposed portions serve and the sensitive surface 21 of substrate 2 corresponding TAB line 4 connected each location association ground forms overleaf on 22.Exposed portions serve is corresponding to the back side alignment mark 71,71 of corresponding TAB line 4 connected each positions on the indication back side 22.Each back side alignment mark 71 is formed along bonding region SB point-blank, so that two opposite sides of substrate 2 are combined.For example, back side alignment mark 71 is disposed in the central part of bonding region SB.Because the materials A l of backplate 7 is different on color with the material Si of substrate 2, so back side alignment mark 71 can be by identification easily intuitively.
When TAB line 4 was connected to backplate 7 by conductive adhesive film 5, conductive adhesive film 5 need contact with each other with backplate 7 inevitably, so that TAB line 4 is electrically connected to backplate 7.So, back side alignment mark 71 must be less than TAB line 4 on width.On the other hand, consider that certain bonding region (that is the width of back side alignment mark 71) preferably is set between conductive adhesive film 5 and the substrate 2 because the cohesion of the backplate 7 that the sclerosis of conductive adhesive film 5 causes is broken.The width of back side alignment mark 71 is preferably width about 20% to 80% of TAB line 4, and for example is the about 0.6mm according to present embodiment.Distance between the back side alignment mark 71 and 71 for example be and bonding region SB and SB between the same 62mm of distance.
As shown in Figure 3, a plurality of this solar battery cells 100 are arranged to a row, so that each sensitive surface alignment mark 6 is in alignment with each other with corresponding back side alignment mark 71.Solar battery cell 100 is bonded to together by TAB line 4, and each TAB line 4 is arranged with back side alignment mark 71 along corresponding sensitive surface alignment mark 6 by corresponding conductive adhesive film 5.Through by means of corresponding TAB line 4 (referring to Fig. 4); Finger electrode 3 on sensitive surface 21 sides of solar battery cell 100A is connected to the backplate 7 on the back side 22 sides of the solar battery cell 100B that is adjacent to solar battery cell 100A; 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 of the solar battery cell 100C that is adjacent to solar battery cell 100B; And repeat this operation, realize and to combine.Therefore, be arranged to one row a plurality of solar battery cells 100 be electrically connected in series in together.More than one this array is set to form solar module.
As stated, in the solar battery cell 100 according to present embodiment, the exposed portions serve of exposing substrate 2 is formed on the back side 22, and is corresponding with each position of the corresponding TAB line 4 of the connection on the sensitive surface 21.Each exposed portions serve will connect the position of corresponding TAB line 4 corresponding to back side alignment mark 71 on the back side alignment mark 71 indication back sides 22.Therefore, the position that connect TAB line 4 can be discerned visually, so that TAB line 4 can be connected to the position of expection exactly.In addition; Through omitting the part of backplate--for example; When backplate 7 is formed, through avoiding electrode material is applied to the part corresponding to back side alignment mark 71 at the back side, after perhaps electrode forms overleaf; Optionally remove the part of backplate, can easily form back side alignment mark 71.As a result, can suppress the increase of manufacturing cost.
In addition, in solar battery cell 100, the shape of the line-like that the live width of the TAB line 4 that back side alignment mark 71 is shaped as than will connects is little.This causes the enough bonding regions between TAB line 4 and the substrate 2, and the TAB line 4 with enough mechanical connection intensity is provided.
In addition, in the solar module that forms by solar battery cell 100, arrange a plurality of solar battery cells 100.Through the TAB line 4 that is arranged along corresponding sensitive surface alignment mark 6 and back side alignment mark 71 by corresponding conductive adhesive film 5 separately, the finger electrode 3 on the solar battery cell 100 in the adjacent solar battery cell 100 is connected to the backplate 7 of another solar battery cell 100.In this solar module, TAB line 4 is connected to the position of expection exactly.So, can suppress the row bending of solar battery cell 100.Therefore, when making solar module, can suppress residual stress possible 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.In the present embodiment, with the difference of mainly describing with first embodiment of above description.
Fig. 5 is the plane graph that shows the back side of solar battery cell according to a second embodiment of the present invention.As shown in Figure 5; Be according to the solar battery cell of second embodiment 200 and difference according to the solar battery cell 100 (referring to Fig. 2) of first embodiment; Solar battery cell 200 comprises the back side alignment mark 72 of dotted line shape, rather than the back side alignment mark 71 of linearity.
More specifically, each back side alignment mark 72 is formed similar dotted line along corresponding bonding region SB, so that two opposite sides of substrate 2 are combined.In the alignment mark 72, the not exposed portions serve N that does not expose substrate 2 is inserted between continuous the exposed portions serve P and P overleaf.So, when TAB line 4 is connected to backplate 7, set up the electrical connection between TAB line 4 and the backplate 7 through exposed portions serve N not.Therefore, the live width of back side alignment mark 71 can perhaps can be equal to, or greater than the live width of TAB line 4 less than the live width of TAB line 4.Yet for the TAB line 4 with enough mechanical connection intensity is provided, the live width of back side alignment mark 72 preferably is equal to, or greater than the live width of TAB line 4.The width of back side alignment mark 72 for example be TAB line 4 width about 20% to 200%.In the present embodiment, the width of back side alignment mark 72 is about 1.5mm, as the width of TAB line 4.The length d p of exposed portions serve P for example is that about 0.5mm is to 30mm.In the present embodiment, length d p is about 12mm.In addition, the length d n of exposed portions serve N for example is not that about 0.5mm is to 30mm.In the present embodiment, length d n is about 12mm.
In solar battery cell 200, the exposed portions serve of exposing substrate 2 is formed on the back side 22, and is corresponding with each position that connects corresponding TAB line 4 on the sensitive surface 21.Each exposed portions serve will connect the position of corresponding TAB line 4 corresponding to back side alignment mark 72 on the back side alignment mark 72 indication back sides 22.Therefore, the position that connect TAB line 4 can be discerned visually, so that TAB line 4 can be connected to the position of expection exactly.In addition, in solar battery cell 200, when backplate 7 is formed,, can easily form back side alignment mark 72 through avoiding electrode material is applied to the part corresponding to back side alignment mark 72 at the back side.As a result, can suppress the increase of manufacturing cost.
In addition, in solar battery cell 200, the shape of 72 one-tenth similar dotted lines of back side alignment mark.This causes in the exposed portions serve P that exposes substrate 2, the enough bonding regions between TAB line 4 and the substrate 2.In addition, TAB line 4 can be equipped with enough mechanical connection intensity.
In addition, in the solar module that forms by solar battery cell 200, arrange a plurality of solar battery cells 200.Through the TAB line 4 that is arranged along corresponding sensitive surface alignment mark 6 and back side alignment mark 72 by corresponding conductive adhesive film 5 separately, the finger electrode 3 on the solar battery cell in the adjacent solar battery cell 200 is connected to the backplate 7 of another solar battery cell 200.In this solar module, TAB line 4 is connected to the position of expection exactly.So, can suppress the row bending of solar battery cell 200.Therefore, when making solar module, can suppress residual stress possible in the solar battery cell 200, allow to improve fabrication yield.
Now, with the solar battery cell of describing a third embodiment in accordance with the invention.In the present embodiment, with the difference of mainly describing with first embodiment of above description.
Fig. 6 is the plane graph at the back side that shows the solar battery cell of a third embodiment in accordance with the invention.As shown in Figure 6; Be according to the solar battery cell of the 3rd embodiment 300 and difference according to the solar battery cell 100 (referring to Fig. 2) of first embodiment; Solar battery cell 300 comprises the back side alignment mark 73 that changes the straight line of thickness according to the position on it, rather than the back side alignment mark 71 of linearity.
More specifically, back side alignment mark 73 is formed along corresponding bonding region SB separately point-blank, so that two opposite sides of substrate 2 are combined.Back side alignment mark 73 comprises separately live width less than the fine rule part 73a of the live width of TAB line 4, and live width is equal to, or greater than the thick line part 73b of the live width of TAB line 4 separately; Fine rule part 73a and thick line part 73b are alternately formed continuously.In addition, fine rule part 73a, 73a are positioned at the two ends of back side alignment mark 73.
The width of fine rule part 73a for example is about 0.6mm, and is the same with width according to the back side alignment mark 71 (referring to Fig. 2) of first embodiment.In addition, the width of thick line part 73b for example be TAB line 4 width 20% to 200%, and be about 1.5mm according to present embodiment; The width of thick line part 73b is identical with the width of TAB line 4.The length of the length of fine rule part 73a and thick line part 73b for example each naturally approximately 0.5mm and, approximately be 12mm separately to 30mm according to present embodiment.
In aforesaid solar battery cell 300, the exposed portions serve of exposing substrate 2 is formed on the back side 22, and is corresponding with each position that connects corresponding TAB line 4 on the sensitive surface 21.Each exposed portions serve will connect the position of corresponding TAB line 4 corresponding to back side alignment mark 73 on the back side alignment mark 73 indication back sides 22.Therefore, the position that connect TAB line 4 can be discerned visually, so that TAB line 4 can be connected to the position of expection exactly.In addition, when backplate 7 is formed,, can easily form back side alignment mark 73 through avoiding electrode material is applied to the part corresponding to back side alignment mark 73 at the back side.As a result, can suppress the increase of manufacturing cost.
In addition, in solar battery cell 300, back side alignment mark 73 comprise live width separately less than the fine rule part 73a of the live width of the TAB line 4 that will be connected to substrate and separately live width be equal to, or greater than the thick line part 73b of the live width of TAB line 4; Fine rule part 73a and thick line part 73b are alternately formed continuously.So; Compare with solar battery cell 100 according to first embodiment; Be configured to thick line part 73b according to the solar battery cell 300 of the 3rd embodiment bigger bonding region between TAB line 4 and the substrate 2 is provided, and make TAB line 4 be provided with high mechanical connection intensity.
In addition, in the solar module that forms by solar battery cell 300, arrange a plurality of solar battery cells 300.Through the TAB line 4 that is arranged along corresponding sensitive surface alignment mark 6 and back side alignment mark 73 by corresponding conductive adhesive film 5 separately, the finger electrode 3 on the solar battery cell in the adjacent solar battery cell 300 is connected to the backplate 7 of another solar battery cell 300.In this solar module, TAB line 4 is connected to the position of expection exactly.So, can suppress the row bending of solar battery cell 300.Therefore, when making solar module, can suppress residual stress possible in the solar battery cell 300, allow to improve fabrication yield.
Now, with the solar battery cell of describing a fourth embodiment in accordance with the invention.In the present embodiment, with the difference of mainly describing with the 3rd embodiment of above description.
Fig. 7 is the plane graph at the back side that shows the solar battery cell of a fourth embodiment in accordance with the invention.As shown in Figure 7; Be according to the solar battery cell of the 4th embodiment 400 and difference according to the solar battery cell 300 (referring to Fig. 6) of the 3rd embodiment; Solar battery cell 400 comprises the thick line part 73b that has the two ends that are positioned at the back side separately, the back side alignment mark 74 of 73b, rather than has fine rule part 73a, the 73a at the two ends that are positioned at the back side separately.
Certainly, 400 performances of aforesaid solar battery cell are similar to the effect according to the solar battery cell 300 of the 3rd embodiment.
Now, with the solar battery cell of describing according to a fifth embodiment of the invention.In the present embodiment, with the difference of mainly describing with the 3rd embodiment of above description.
Fig. 8 is the plane graph that shows the back side of solar battery cell according to a fifth embodiment of the invention.As shown in Figure 8; Be according to the solar battery cell of the 5th embodiment 500 and difference according to the solar battery cell 300 (referring to Fig. 6) of the 3rd embodiment; Solar battery cell 500 comprises the back side alignment mark 75 that has the thick line part 73b longer than fine rule part 73a separately, rather than has the fine rule part 73a of same length and the back side alignment mark 73 of thick line part 73b separately.
Certainly, 500 performances of aforesaid solar battery cell are similar to the effect according to the solar battery cell 300 of the 3rd embodiment.
In addition, in solar battery cell 500, thick line part 73b is longer than fine rule part 73a.So; Compare with solar battery cell 300 according to the 3rd embodiment; Solar battery cell 500 is constructed such that thick line part 73b provides bigger bonding region between TAB line 4 and the substrate 2, and makes TAB line 4 be provided with high mechanical connection intensity.
Now, with the solar battery cell of describing according to a sixth embodiment of the invention.In the present embodiment, with the difference of mainly describing with the 3rd embodiment of above description.
Fig. 9 is the plane graph that shows the back side of solar battery cell according to a sixth embodiment of the invention.As shown in Figure 9; Be according to the solar battery cell of the 6th embodiment 600 and difference according to the solar battery cell 300 (referring to Fig. 6) of the 3rd embodiment; Solar battery cell 600 comprises the back side alignment mark 76 that has the thick line part 73b shorter than fine rule part 73a separately, rather than has the fine rule part 73a of same length and the back side alignment mark 73 of thick line part 73b separately.
Certainly, 600 performances of aforesaid solar battery cell are similar to the effect according to the solar battery cell 300 of the 3rd embodiment.
Now, with the solar battery cell of describing according to a seventh embodiment of the invention.In the present embodiment, with the difference of mainly describing with first embodiment of above description.
Figure 10 is the plane graph that shows the back side of solar battery cell according to a seventh embodiment of the invention.Shown in figure 10; Be according to the solar battery cell of the 7th embodiment 700 and difference according to the solar battery cell 100 (referring to Fig. 2) of first embodiment; Solar battery cell 700 comprises the back side alignment mark 77 of shearing shape, rather than the back side alignment mark 71 of linearity.
The end of the substrate 2 of each back side alignment mark 77,77 on the extended line that is positioned at the TAB line 4 that will be connected to substrate 2 is shaped as similar leg-of-mutton shearing.This shearing can be shaped as similar rectangular-shaped, semi-circular shape or the like.In a word, this shearing can be formed, so that substrate 2 exposes from this shearing.
In aforesaid solar battery cell 700, the exposed portions serve of exposing substrate 2 is formed on the back side 22, and is corresponding with each position that connects corresponding TAB line 4 on the sensitive surface 21.Each exposed portions serve is corresponding to back side alignment mark 77, the position that will connect corresponding TAB line 4 on the back side alignment mark 77 indication back sides 22.Therefore, the position that connect TAB line 4 can be discerned visually, so that TAB line 4 can be connected to the position of expection exactly.In addition, when backplate 7 is formed,, can easily form back side alignment mark 77 through avoiding electrode material is applied to the part corresponding to back side alignment mark 77 at the back side.As a result, can suppress the increase of production cost.
In addition, in solar battery cell 700, back side alignment mark 77 can be shaped as similar shearing shape in the end of the substrate 2 on the extended line that is positioned at the TAB line 4 that will be connected to substrate 2.So, and on according to the back side alignment mark 71 to 76 in the solar battery cell 100 to 600 of first to the 6th embodiment of above description, compare respectively, can be more prone to ground and carry out size management or the like on the alignment mark 77 overleaf.So, when backplate 7 was formed, the part corresponding to back side alignment mark 77 at the back side can easily be provided with.Therefore, backplate 7 can easily be formed.
In addition, in the solar module that forms by solar battery cell 700, arrange a plurality of solar battery cells 700.Through the TAB line 4 that is arranged along corresponding sensitive surface alignment mark 6 and back side alignment mark 77 by corresponding conductive adhesive film 5 separately, the finger electrode 3 on the solar battery cell in the adjacent solar battery cell 700 is connected to the backplate 7 of another solar battery cell 700.In this solar module, TAB line 4 is connected to the position of expection exactly.So, can suppress the row bending of solar battery cell 700.Therefore, when making solar module, can suppress residual stress possible in the solar battery cell 700, allow to improve fabrication yield.
Preferred embodiment according to solar battery cell of the present invention is described in detail.Yet, the invention is not restricted to the embodiment of above description.For example, in the embodiment of above description, TAB line 4 is connected to finger electrode 3 by conductive adhesive film 5.Yet, can the busbar electrode that formed by Ag or the like be set through the position that on sensitive surface 21, will connect TAB line 4, and the busbar electrode is connected to TAB line 4 through scolding tin, TAB line 4 can be electrically connected to finger electrode 3.
In addition, the embodiment that more than describes uses membranaceous conductive adhesive film 5 as electrically conducting adhesive.Yet, also can the using liquid electrically conducting adhesive.
If any in a plurality of solar battery cells of formation solar module is not so good as another solar battery cell in such as the photoelectric characteristic of voltage or current characteristics; Under the influence of the solar battery cell with inferior photoelectric characteristic, the photoelectric characteristic of whole solar cell assembly possibly be lowered so.Below the method photoelectric characteristic that is used to suppress solar module better be lowered: the photoelectric characteristic of solar battery cell that is used for solar module is by premeasuring, so that can combine and form solar module through being judged as the solar battery cell with equal photoelectric characteristic.
Figure 11 is the sketch map that shows traditional measuring equipment.Figure 12 is the sketch map that shows the probe of the measuring equipment that is used for Figure 11.Shown in figure 11, the traditional measuring equipment 10A that is configured to measure the photoelectric characteristic of solar battery cell comprises surface electrode 11 and paired probe 12A, 12A.
Surface electrode 11 is shaped as for example similar general square tabular, and is for example formed by brass.Solar battery cell is placed on the upper surface of surface electrode 11, so that the backplate contact surface electrode 11 of solar battery cell.Probe 12A is elongated, and paired probe 12A, 12A arranged away from each other, so that parallel on surface electrode 11.
Shown in figure 12, probe 12A comprises rod 13, voltage probe pin 14, a plurality of current probe pin 15 and excellent support member 16,16.
In traditional measuring equipment 10A, the traditional solar battery cell with busbar electrode is placed on the upper surface of surface electrode 11, lays so that the busbar electrode is parallel to probe 12A.The horizontal level of rod 13 is adjusted, so that busbar electrode and probe 12A lay on the contrary.Then, rod 13 is moved down to allow contact site 14A and contact site 15A to push the busbar electrode.Utilize the sensitive surface of false solar radiation solar battery cell then.Then, the voltage and current characteristic of solar battery cell can be measured.
In the present embodiment, solar battery cell 100,200,300,400,500,600,700 does not comprise the busbar electrode, and sensitive surface alignment mark 6 is shaped as the shape (referring to Fig. 1) of similar dotted line.So, a plurality of finger electrode 3 fails to conduct each other.Therefore; Measure the electrical characteristics of solar battery cell 100 to 700 if use traditional measuring equipment; Current probe pin 15 need being set in the middle of the finger electrode 3 be equaled the interval in the middle of the current probe pin 15, so that can be pressed facing to each finger electrode 3.In this case, when the solar battery cell with different finger electrodes several types at interval receives when measuring, need prepare dissimilar probes for solar battery cell with different finger electrodes each type at interval.This possibly increase the cost of measuring equipment.
In contrast, Figure 13 shows to be used for the sketch map according to the measuring equipment of solar battery cell of the present invention.Figure 14 is the sketch map that shows the probe of the measuring equipment that is used for Figure 13.Be used for difference according to the measuring equipment 10B of solar battery cell of the present invention and traditional measuring equipment 10A and be the structure around the current probe pin 15.
More specifically, in measuring equipment 10B, a plurality of current probe pins 15 are attached to rod 13, so that vertically substantially symmetrically and with closely staggered mode laying with respect to voltage probe pin 14 along rod 13.The contact site 14B of voltage probe pin 14 is connected to the contact site 15A of current probe pin 15 through plate electrode 17.In measuring equipment 10B, the contact site 14B of voltage probe pin 14 has than the little diameter of contact site 14A among traditional measuring equipment 10A.Plate electrode 17 is elongated tabular components, and for example by forming with the same scolding tin electro-coppering line of the material of TAB line.
In aforesaid measuring equipment 10B, for example, solar battery cell 100 is placed on the upper surface of surface electrode 11, lays (referring to Figure 11) so that probe 12B meets at right angles with finger electrode 3 basically.Then, rod 13 is moved down so that plate electrode 17 is pushed all finger electrodes 3.Utilize the sensitive surface of false solar radiation solar battery cell 100 then.Then, voltage and current characteristic that can the one-shot measurement solar battery cell.
As stated, at the measuring equipment 10B that is used for according to solar battery cell of the present invention, plate electrode 17 is mounted, so that cross over the contact site 14B of voltage probe pin 14 and the contact site 15A of current probe pin 15.So, even for not comprising the solar battery cell 100 to 700 that busbar electrode and wherein a plurality of finger electrode 3 are not conducted each other, also can the one-shot measurement photoelectric characteristic.
In addition, at the measuring equipment 10B that is used for according to solar battery cell of the present invention, current probe pin 15 closely be arranged in rod 13 vertically in.This makes plate electrode 17 can push solar battery cell equably.Therefore, measuring light electrical characteristics suitably.
In having the measuring equipment 10B of plate electrode 17, it must be circular that each contact site 14B and contact site 15A do not need, and can be for example similar needle-like.In addition, the material of plate electrode 17 does not need necessarily to be similar to the material of TAB line, and can be any other metal.
Now, with the measurement result of the photoelectric characteristic of describing solar battery cell.Table 1 show to use the measurement result of photoelectric characteristic of the traditional solar battery cell with busbar electrode of traditional measuring equipment, and the measurement result of using the photoelectric characteristic that does not have the solar battery cell that busbar electrode and a plurality of finger electrode do not conduct each other of measuring equipment (new measuring equipment) with plate electrode.Two solar battery cells that are used to measure are mutually the same, and except a solar battery cell comprises the busbar electrode, and another does not comprise the busbar electrode.
[table 1]
Table 1 has shown about all efficiency eta (%), filter factor F.F (%), open circuit voltage characteristic Voc (V), short circuit current characteristic Isc (A) and series resistance characteristic Rs (Ω) as photoelectric characteristic; For using traditional measuring equipment; The measurement of photoelectric characteristic with traditional solar battery cell of busbar electrode; And the new measuring equipment that has plate electrode for use; Do not have the measurement of the photoelectric characteristic of the solar battery cell that busbar electrode and a plurality of finger electrode do not conduct each other, obtain similar measurement result.
In above embodiment, though the alignment mark at the back side corresponding to the exposed portions serve of exposing substrate 2, the alignment mark at the back side can be omitted a kind of degree so that the part that substrate 2 is not exposed corresponding to backplate 7 equally.For example, the alignment mark at the back side can be arranged on groove on the backplate 7 or the like.In other words, the alignment mark at the back side can be the clipped that is omitted of backplate 7 (comprises exposed portions serve and groove or the like both).
Here, conductive adhesive film 5 has less relatively adhesion to the back side 22 of substrate 2 sometimes.In the case, in above embodiment, at least one alignment mark (part) at the back side can be filled with auxiliary material, so conductive adhesive film 5 can be relatively by attached.That is to say that at least one back side alignment mark can be filled with auxiliary material, and the adhesion of 5 pairs of auxiliary material of conductive adhesive film can to compare the adhesion at the back side 22 of substrate 2 of conductive adhesive film 5 big.In addition, back side alignment mark not necessarily need be filled with auxiliary material, but can only be filled into the degree that it is covered by auxiliary material.Auxiliary material as filling back side alignment mark for example can utilize Ag, Cu, Au, ITO (tin indium oxide) and IZO (indium zinc oxide) or the like.
In addition; To be from what above-mentioned explanation was understanded; Can be made into through method according to solar module of the present invention; This method comprises: photoelectric substrates is set; Said photoelectric substrates has and is arranged in a plurality of finger electrodes being arranged, be arranged on the said sensitive surface and indicate the 2nd TAB line will be connected to alignment mark and the backplate that covers the back side of said substrate of the position of said finger electrode by electrically conducting adhesive on its sensitive surface, and through apply a TAB line by electrically conducting adhesive, said backplate will be connected to a plurality of finger electrodes on the adjacent unit; Wherein, the part at the back side of substrate with sensitive surface on corresponding position, the position that will apply the 2nd TAB line exposed; And,, a TAB line is connected to backplate by electrically conducting adhesive in the position of indicating through the alignment mark at the back side.
Can also be made through a kind of method according to solar module of the present invention; This method comprises: photoelectric substrates is set; This photoelectric substrates has the backplate at the back side of a plurality of finger electrodes that are arranged on its sensitive surface and covered substrate, and through apply a TAB line by electrically conducting adhesive, backplate will be connected to a plurality of finger electrodes on the adjacent unit; Wherein, Backplate has the clipped that is arranged as at least one alignment mark that limits the back side, the position that at least one alignment mark at the back side indicates a TAB line to be applied in, and at least one alignment mark at the back side has the width littler than the width of a said TAB line; And,, a TAB line is connected to backplate by electrically conducting adhesive in the position of indicating through the alignment mark at the back side.
Claims (21)
1. solar battery cell; It is characterized in that; Comprise substrate, be formed on a plurality of finger electrodes on the sensitive surface of said substrate and the backplate that covers the back side of said substrate; Through apply a TAB line by electrically conducting adhesive, said backplate is connected to a plurality of finger electrodes on the adjacent unit
Wherein, With said sensitive surface on corresponding position, the position that will apply the 2nd TAB line; The part at the said back side of said substrate is exposed, and this exposed portions serve constitutes the alignment mark that applies the position that is used to indicate a said TAB line at the said back side.
2. solar battery cell as claimed in claim 1 is characterized in that said alignment mark is the shape of line-like, and has the width littler than the width of a said TAB line.
3. solar battery cell as claimed in claim 2 is characterized in that, said alignment mark has 20% to 80% width of the said width of a said TAB line.
4. solar battery cell as claimed in claim 2 is characterized in that said alignment mark is a straight line.
5. solar battery cell as claimed in claim 1; It is characterized in that the said alignment mark at the said back side is a straight line, and have first and second portion; Said first has the width littler than the width of a said TAB line; Said second portion has the width of the said width that is equal to, or greater than said TAB line, and wherein, said first and said second portion are alternately arranged along said alignment mark.
6. solar battery cell as claimed in claim 5 is characterized in that, said first has the length with the equal in length of said second portion, and more than one said first is positioned at the periphery at the said back side of said substrate.
7. solar battery cell as claimed in claim 5 is characterized in that, said first has the length with the equal in length of said second portion, and more than one said second portion is positioned at the periphery at the said back side of said substrate.
8. solar battery cell as claimed in claim 5 is characterized in that, said first has the length bigger than the length of said second portion.
9. solar battery cell as claimed in claim 5 is characterized in that, said first has the length littler than the length of said second portion.
10. solar battery cell as claimed in claim 1 is characterized in that said alignment mark is a straight line; And comprise first area and second area alternately; Wherein, in said first area, the said back side is exposed; And in said second area, the said back side is covered by said backplate.
11. solar battery cell as claimed in claim 10 is characterized in that, said first area has 20% to 200% width of the said width of a said TAB line.
12. solar battery cell as claimed in claim 10 is characterized in that, said first area has the length of 0.5mm to 30mm.
13. solar battery cell as claimed in claim 1 is characterized in that, said alignment mark is made up of the exposed portions serve at the said back side of the periphery that is positioned at the said back side.
14. solar battery cell as claimed in claim 1 is characterized in that, said alignment mark is made up of the exposed portions serve of the shearing shape of the periphery that is positioned at the said back side.
15. solar battery cell as claimed in claim 14 is characterized in that, said alignment mark is triangular shaped.
16. solar battery cell as claimed in claim 14 is characterized in that, said alignment mark is a rectangular shape.
17. solar battery cell as claimed in claim 14 is characterized in that, said alignment mark is a semicircular in shape.
18. solar battery cell; It is characterized in that; Comprise substrate, be formed on a plurality of finger electrodes on the sensitive surface of said substrate and the backplate that covers the back side of said substrate; Through apply a TAB line by electrically conducting adhesive, said backplate is connected to a plurality of finger electrodes on the adjacent unit
Wherein, Said backplate has the clipped that is arranged at least one alignment mark of qualification; The position that said at least one alignment mark indicates a said TAB line to be applied in, said at least one alignment mark has the width littler than the width of a said TAB line.
19. solar battery cell as claimed in claim 18 is characterized in that, said clipped is arranged to and limits a plurality of discontinuous alignment marks zone.
20. solar battery cell as claimed in claim 18; It is characterized in that; At least one said back side alignment mark is filled with auxiliary material, and said electrically conducting adhesive to the adhesion of said auxiliary material greater than the adhesion of said electrically conducting adhesive to the said back side of said substrate.
21. solar battery cell as claimed in claim 19; It is characterized in that; At least one said back side alignment mark is filled with auxiliary material, and said electrically conducting adhesive to the adhesion of said auxiliary material greater than the adhesion of said electrically conducting adhesive to the said back side of said substrate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011121427 | 2011-05-31 | ||
| JP2011-121427 | 2011-05-31 |
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| CN 201220255772 Withdrawn - After Issue CN202651127U (en) | 2011-05-31 | 2012-05-31 | Solar cell unit |
| CN 201220254792 Expired - Fee Related CN202651147U (en) | 2011-05-31 | 2012-05-31 | Solar battery assembly |
| CN201210177989.4A Expired - Fee Related CN102810530B (en) | 2011-05-31 | 2012-05-31 | Solar battery cell |
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| CN (3) | CN202651127U (en) |
| MY (1) | MY166275A (en) |
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| TWI620337B (en) * | 2013-04-30 | 2018-04-01 | 日立化成股份有限公司 | Method for manufacturing solar cell module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9837560B2 (en) | 2011-03-08 | 2017-12-05 | Hitachi Chemical Company, Ltd. | Solar battery cell, solar battery module, method of making solar battery cell and method of making solar battery module |
| US9455359B2 (en) | 2011-05-31 | 2016-09-27 | Hitachi Chemical Company, Ltd. | Solar battery cell, solar battery module and method of making solar battery module |
| JP5181225B2 (en) * | 2011-05-31 | 2013-04-10 | 日立化成株式会社 | SOLAR CELL, SOLAR CELL MODULE, AND SOLAR CELL MODULE MANUFACTURING METHOD |
| JP2014215132A (en) * | 2013-04-24 | 2014-11-17 | 共進電機株式会社 | Bar type probe and measuring device for solar battery cell |
| JP6986726B2 (en) * | 2017-02-28 | 2021-12-22 | アートビーム有限会社 | Solar cells and methods for manufacturing solar cells |
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| CN104134719B (en) * | 2013-04-30 | 2018-05-04 | 日立化成株式会社 | The manufacture method of solar module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN202651147U (en) | 2013-01-02 |
| JP6217080B2 (en) | 2017-10-25 |
| JP5181225B2 (en) | 2013-04-10 |
| CN102810530B (en) | 2017-03-01 |
| JPWO2012165464A1 (en) | 2015-02-23 |
| WO2012165464A1 (en) | 2012-12-06 |
| JP2013077835A (en) | 2013-04-25 |
| MY166275A (en) | 2018-06-22 |
| TW201304163A (en) | 2013-01-16 |
| CN202651127U (en) | 2013-01-02 |
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