CN102376807B - Amorphous silicon solar battery module and manufacturing method thereof - Google Patents
Amorphous silicon solar battery module and manufacturing method thereof Download PDFInfo
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- CN102376807B CN102376807B CN2010102571362A CN201010257136A CN102376807B CN 102376807 B CN102376807 B CN 102376807B CN 2010102571362 A CN2010102571362 A CN 2010102571362A CN 201010257136 A CN201010257136 A CN 201010257136A CN 102376807 B CN102376807 B CN 102376807B
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Abstract
The invention provides an amorphous silicon solar battery module and a manufacturing method thereof. The solar battery module comprises a glass substrate, a transparent conductive oxide (TCO) film, an amorphous silicon layer and back contact (BCD) layers which are stacked with one another sequentially, a first trench, a second trench and a third trench which are communicated with one another, a first module, a second module, a third module and a fourth module, wherein the first trench is transversely formed in the middle of the solar battery module and centrally symmetric about the central point of the solar battery module; the second trench and the third trench are longitudinally connected to two ends of the first trench respectively and centrally symmetric with each other about the central point of the solar battery module; the first module and the second module are isolated from each other by the first trench and centrally symmetric with each other about the central point of the solar battery module and comprise the same number of monomer battery units which are connected in series with one another; the third module and the fourth module with which the BCD layers are integrated are electrically connected to the first module and the second module respectively, centrally symmetric with each other about the central point of the solar battery module and isolated from the second module and the first module through the second trench and the third trench respectively. By the amorphous silicon solar battery pack, requirements of an offline photovoltaic system on charging voltage and charging current can be met; and the utilization efficiency of electric energy generated by the solar battery module can be improved effectively.
Description
Technical field
The present invention relates to the photovoltaic technology field, relate in particular to a kind of amorphous silicon solar cell assembly and manufacture method thereof.
Background technology
Aspect photoelectric conversion technique, be widely used amorphous silicon solar cell at present.Because the output voltage of amorphous silicon cell unit is less, during use, also need to become assembly could meet the actual needs that use several cell units in series.Fig. 1 and 2 shows existing amorphous silicon solar cell assembly.Fig. 1 is the front view of existing amorphous silicon solar cell assembly.Fig. 2 is the A-A line cutaway view of the amorphous silicon solar cell assembly of Fig. 1.As shown in Figure 2, the amorphous silicon cell unit of this amorphous silicon solar cell assembly comprises glass substrate 10, TCO film 12 (Transparent Conductive Oxide; Nesa coating), amorphous silicon layer 14 and BCD (Back Contact; Back electrode) layer 16.In amorphous silicon solar cell assembly manufacture process, by dielectric deposition technique and corresponding laser grooving and scribing technique, form a plurality of amorphous silicon cell unit that are connected in series, namely form amorphous silicon solar cell assembly as shown in Figure 1.
The characteristic of semiconductor of amorphous silicon has determined that the amorphous silicon film solar battery component voltage is higher, and electric current is less.In the net photovoltaic system, the energy-storage units used is generally the storage battery of 12V, meet the 12V charge in batteries to two series connection, open circuit voltage is that the amorphous silicon solar cell assembly of 48V is most suitable, the open circuit voltage of the amorphous silicon solar cell module of prior art is generally 96V, can't meet from the storage battery of the net photovoltaic system demand to charging voltage, storage battery needs larger charging current in addition, and open circuit voltage is that the amorphous silicon solar cell module of 96V also can't meet the demand of storage battery to charging current.
Therefore, how to provide a kind of amorphous silicon solar cell assembly and manufacturing technology thereof to meet from the demand of net photovoltaic system to charging voltage and charging current, improve the utilization ratio of amorphous silicon solar cell electric energy that assembly produces, become industry technical problem urgently to be resolved hurrily.
Summary of the invention
For the problems referred to above, one of purpose of the present invention is to provide a kind of solar module and manufacture method thereof, can meet from the demand of net photovoltaic system to charging voltage and charging current, and can improve the utilization ratio of amorphous silicon solar cell electric energy that assembly produces.
The invention provides a kind of amorphous silicon solar cell assembly, comprise the glass substrate, TCO film, amorphous silicon layer and the BCD layer that stack gradually, also comprise: the first groove, the second groove and the 3rd groove that run through TCO film, amorphous silicon layer and BCD layer and connection, wherein the first channel lateral is arranged in the middle part of assembly and along assembly central point Central Symmetry, the first groove two ends all are positioned at assembly, the second and the 3rd groove vertically is connected to respectively the two ends of the first groove and along assembly central point Central Symmetry, second and the end of the 3rd groove all connect to the assembly edge; The first module and the second module, by the first trench isolations and along assembly central point Central Symmetry, the cell unit that comprises equal number and be connected in series; And the 3rd module and four module, be electrically connected at respectively on the first module and the second module and along assembly central point Central Symmetry, and respectively by the second groove and the 3rd groove and the second module and the isolation of the first module, the BCD layer of the 3rd module and four module all is integrated.
Preferably, in solar module of the present invention, between the cell unit of this first module and the second module, all by running through the laser scoring isolation of amorphous silicon layer and BCD layer, this first groove is parallel with laser scoring.
Preferably, in solar module of the present invention, this first channel lateral level is arranged in the assembly middle part, and this second groove all is connected with the first groove is vertical with the 3rd groove.
Preferably, in solar module of the present invention, this second groove and the 3rd groove lay respectively at upper left side and the lower right side of the first groove, this first module and the second module lay respectively at the Ce He upper right side, lower-left of assembly, and the 3rd module and four module lay respectively at upper left side and the lower right side of assembly.
Preferably, in solar module of the present invention, this second groove and the 3rd groove lay respectively at the Ce He upper right side, lower-left of the first groove, this first module and the second module lay respectively at upper left side and the lower right side of assembly, and the 3rd module and four module lay respectively at the Ce He upper right side, lower-left of assembly.
Preferably, in solar module of the present invention, the area of the first module is greater than the area of four module.
The invention provides a kind of method of manufacturing solar module, comprise step: provide glass substrate; On glass substrate, form the TCO film; The TCO film is carried out to the first laser grooving and scribing; The deposited amorphous silicon layer; Amorphous silicon layer is carried out to the second laser grooving and scribing; Deposition BCD layer; The first module and corresponding amorphous silicon layer and the BCD layer of the second module are carried out to the 3rd road laser grooving and scribing; BCD layer, amorphous silicon layer, TCO film are carried out to the 4th road laser grooving and scribing and form first, second, and third groove be communicated with.
Preferably, in the method for the invention, the first groove is parallel to the formed laser scoring of the 3rd road laser grooving and scribing.
Preferably, in the method for the invention, this first channel lateral level is formed on the assembly middle part, and the second groove all is connected with the first groove is vertical with the 3rd groove.
Preferably, in the method for the invention, this second groove and the 3rd groove are respectively formed at upper left side and the lower right side of the first groove.
Preferably, this second groove and the 3rd groove are respectively formed at the Ce He upper right side, lower-left of the first groove.
With cell unit all in prior art, all be connected in series can't meet from the net photovoltaic system demand of charging voltage and charging current is compared, amorphous silicon solar cell assembly of the present invention has formed the first module and the second module be connected in parallel, the cell unit that the first and second modules all comprise equal number and are connected in series, thereby reduced charging voltage and improved charging current, effectively met from the demand of net photovoltaic system to charging voltage and charging current, improved the utilization ratio of electric energy that assembly produces.
The accompanying drawing explanation
Fig. 1 is the front view of existing amorphous silicon solar cell assembly;
Fig. 2 is the cutaway view along A-A line in Fig. 1;
Fig. 3 is the front view according to the solar module of illustrative examples of the present invention;
Fig. 4 is the cutaway view along I-I line in Fig. 3;
Fig. 5 is the cutaway view along N-N line in Fig. 3;
Fig. 6 is the cutaway view along M-M line in Fig. 3.
Fig. 7 is the flow chart of the manufacture method of amorphous silicon solar cell assembly of the present invention.
Embodiment
Below in conjunction with accompanying drawing, describe the preferred embodiments of the present invention in detail, identical reference number means identical element in the accompanying drawings.Term herein " laterally " and " vertically " are the directions of the front view of reference solar cell assembly and relative and laser scoring and determining, " left side ", " right side ", " on ", D score is the front view of reference solar cell assembly and assembly central point and determine.
For simplified characterization and example, in Fig. 3 to Fig. 6, amorphous silicon solar cell module is shown and has four cell unit and describe.But the present invention is not defined as four by the quantity of cell unit, can suitably increase and decrease according to actual needs.Below in conjunction with Fig. 3 to Fig. 6, describe illustrative examples of the present invention in detail.
Referring to Fig. 3 to Fig. 6, Fig. 3 is the front view according to the amorphous silicon solar cell assembly of illustrative examples of the present invention; Fig. 4 to Fig. 6 is respectively along the cutaway view of I-I line, N-N line and M-M line in Fig. 3, amorphous silicon solar cell assembly of the present invention comprises glass substrate 10, TCO film 12, amorphous silicon layer 14 and the BCD layer 16 stacked gradually, and also comprises the first groove G1, the second groove G2, the 3rd groove G3, the first module 20, the second module 22, the 3rd module 24 and four module 26.Described amorphous silicon layer 14 is preferably the PIN amorphous silicon layer, comprises P layer amorphous silicon film, I layer amorphous silicon film and N layer amorphous silicon film.Described TCO film is preferably ITO (Sn-doped In
2O
3Tin dope three indium oxides), ZnO or SnO
2Film.
The first groove G1, the second groove G2 and the 3rd groove G3 are interconnected and run through TCO film 12, amorphous silicon layer 14 and BCD layer 16, the first groove G1 laterally is arranged in the middle part of assembly and along assembly central point Central Symmetry, the first groove G1 two ends all are positioned at solar module, the second and the 3rd groove G2 and G3 vertically are connected to respectively the two ends of the first groove G1 and along assembly central point Central Symmetry, the end of the second and the 3rd groove G2 and G3 all connects to the assembly edge.
In the present embodiment, the horizontal parallel arrangement of the first groove G1 is at assembly middle part, second with the 3rd groove G2 and G3 all with first groove G1 is vertical is connected.
In the present embodiment, the second and the 3rd groove G2 and G3 lay respectively at upper left side and the lower right side of the first groove G1, the first module 20 and the second module 22 lay respectively at the Ce He upper right side, lower-left of assembly, and the 3rd module 24 and four module 26 lay respectively at upper left side and the lower right side of assembly.
Replacedly, in another embodiment of the present invention, the second groove G2 and the 3rd groove G3 lay respectively at the Ce He upper right side, lower-left of the first groove G1, the first module 20 and the second module 22 lay respectively at upper left side and the lower right side of assembly, and the 3rd module 24 and four module 26 lay respectively at the Ce He upper right side, lower-left of assembly.
In the present embodiment, the area of described the first module 20 and the second module 22 is equal, and the area of described the 3rd module 24 and four module 26 is equal, and the area of described the first module 20 is greater than the area of four module 26.
The first module 20 and the second module 22 are by the first groove G1 isolation and along assembly central point Central Symmetry, the cell unit that comprises equal number and be connected in series, described cell unit are parallel to the first groove G1 and arrange.
The 3rd module 24 and four module 26 are electrically connected at respectively on the first module 20 and the second module 22 and along assembly central point Central Symmetry and distribute, and respectively by the second groove G2 and the 3rd groove G3 and the second module 22 and the first module 20 isolation.
Between the cell unit of described the first module 20 and the second module 22, all by running through the laser scoring L isolation of amorphous silicon layer and BCD layer, described laser scoring L is parallel with the first groove G1.
Continuation is referring to Fig. 5 and Fig. 6, the BCD layer 16 of described the 3rd module 24 and four module 26 all is integrated, on it, do not carry out for the 16 De Di tri-road laser grooving and scribing (P3) of BCD layer, the 3rd module 24 is upper by the positive electrode (P) that its corresponding BCD layer 16 is electrically connected to the first module 20, and four module 26 is electrically connected on the negative electrode (N) of the second module 22 by its corresponding BCD layer 16.
The solar module of illustrative examples of the present invention is by the setting of the first groove G1, the second groove G2 and the 3rd groove G3, component clustering is become to the first module 20 and the second module 22 be connected in parallel, and respectively the electrode of the first module 20 and the second module 22 is drawn by the 3rd module 24 and four module 26.
With the existing amorphous silicon solar cell assembly shown in Fig. 1,2, compare, the open circuit voltage of amorphous silicon solar cell assembly shown in Figure 3 is half of existing voltage, and the electric current provided is the twice of existing electric current.When existing solar module open circuit voltage is 96V, the open circuit voltage of amorphous silicon solar cell assembly of the present invention that has the cell unit of equal number with it is 48V, is well positioned to meet from the storage battery of the net photovoltaic system demand to charging voltage and charging current.
Above are only the preferred embodiments of the present invention, can modify to the first groove G1, the second groove G2 and the 3rd groove G3.The position of the first groove G1, the second groove G2 and the 3rd groove G3 includes but not limited to following position: the first groove also can be angled with the laser scoring L of the first module or the second module.Preferably, described angle is greater than 0 ° and be less than 90 °; The second groove G2 and the 3rd groove G3 can be not orthogonal to the first groove G1, angled with the first groove G1, and preferably, described angle is greater than 0 ° and be less than 90 ° or be greater than 90 ° and be less than 180 °.
Fig. 7 is the flow chart of the manufacture method of manufacture amorphous silicon solar cell assembly shown in Figure 3, and at first the manufacture method of amorphous silicon solar cell assembly of the present invention carries out step S1, and glass substrate is provided.
Then continue step S2, on glass substrate, form the TCO film.Described TCO film is preferably ITO, ZnO or SnO
2Film.
Then continue step S3, the TCO film is carried out to the first laser grooving and scribing.
Then continue step S4, the deposited amorphous silicon layer.Described amorphous silicon layer is preferably the PIN amorphous silicon layer, comprises P layer amorphous silicon film, I layer amorphous silicon film and N layer amorphous silicon film.
Then continue step S5, amorphous silicon layer is carried out to the second laser grooving and scribing.
Then continue step S6, deposition BCD layer.
Then continue step S7, the first module and corresponding amorphous silicon layer and the BCD layer of the second module are carried out to the 3rd road laser grooving and scribing.In the present embodiment, the first groove is parallel to the formed laser scoring of the 3rd road laser grooving and scribing.
Then continue step S8, BCD layer, amorphous silicon layer, TCO film are carried out to the 4th road laser grooving and scribing and form first, second, and third groove be communicated with.
In the present embodiment, described the first channel lateral level is formed on the assembly middle part, and described the second groove all is connected with the first groove is vertical with the 3rd groove.
After completing steps S8, described the first module and the second module are by the first trench isolations, and the 3rd module and four module are respectively by the second groove and the 3rd groove and the second module and the isolation of the first module.Thereby realize making the first module and the second module be connected in parallel, and the technique effect of respectively electrode of the first module and the second module being drawn by the 3rd module and four module.
Above are only the preferred embodiment of the manufacture method of amorphous silicon solar cell assembly shown in Figure 3, the execution sequence of step S1-S8 do not limited, can modify to step order wherein.
For example, replacedly, in another embodiment of the present invention, can first perform step S8, BCD layer, amorphous silicon layer, TCO film are carried out to the 4th road laser grooving and scribing and form first, second, and third groove and the third and fourth module be communicated with, then perform step S7, the first module and corresponding amorphous silicon layer and the BCD layer of the second module are carried out to the 3rd road laser grooving and scribing formation the first module and the second module.Now can make equally the first module and the second module by the first trench isolations, the 3rd module and four module are respectively by the second groove and the 3rd groove and the second module and the isolation of the first module, thus the technique effect that realization makes the first module and the second module be connected in parallel.
The second groove G2 and the 3rd groove G3 can lay respectively at upper left side and the lower right side of the first groove G1, correspondingly the first module 20 and the second module 22 lay respectively at the Ce He upper right side, lower-left of assembly, and the 3rd module 24 and four module 26 lay respectively at upper left side and the lower right side of assembly.
Replacedly, the second groove G2 and the 3rd groove G3 also can lay respectively at the Ce He upper right side, lower-left of the first groove G1, correspondingly the first module 20 and the second module 22 lay respectively at upper left side and the lower right side of assembly, and the 3rd module 24 and four module 26 lay respectively at the Ce He upper right side, lower-left of assembly.
In view of these instructions, those of ordinary skill in the art will easily expect other embodiments of the invention, combination and modification.Therefore, when in conjunction with above-mentioned explanation and accompanying drawing, reading, the present invention only is defined by the claims.
Claims (9)
1. an amorphous silicon solar cell assembly, comprise the glass substrate, TCO film, amorphous silicon layer and the dorsum electrode layer that stack gradually, characterized by further comprising:
The first groove, the second groove and the 3rd groove that run through TCO film, amorphous silicon layer and dorsum electrode layer and connection, wherein the first channel lateral is arranged in the middle part of assembly and along assembly central point Central Symmetry, the first groove two ends all are positioned at assembly, the second and the 3rd groove vertically is connected to respectively the two ends of the first groove and along assembly central point Central Symmetry, second and the end of the 3rd groove all connect to the assembly edge;
The first module and the second module, by the first trench isolations and along assembly central point Central Symmetry, the cell unit that comprises equal number and be connected in series; And
The 3rd module and four module, be electrically connected at respectively on the first module and the second module and along assembly central point Central Symmetry, and respectively by the second groove and the 3rd groove and the second module and the isolation of the first module, the dorsum electrode layer of the 3rd module and four module all is integrated.
2. amorphous silicon solar cell assembly as claimed in claim 1, is characterized in that, between the cell unit of this first module and the second module, all by running through the laser scoring isolation of amorphous silicon layer and dorsum electrode layer, wherein this first groove is parallel with laser scoring.
3. amorphous silicon solar cell assembly as claimed in claim 1, it is characterized in that, this second groove and the 3rd groove lay respectively at upper left side and the lower right side of the first groove, this first module and the second module lay respectively at the Ce He upper right side, lower-left of assembly, and the 3rd module and four module lay respectively at upper left side and the lower right side of assembly.
4. amorphous silicon solar cell assembly as claimed in claim 1, it is characterized in that, this second groove and the 3rd groove lay respectively at the Ce He upper right side, lower-left of the first groove, this first module and the second module lay respectively at upper left side and the lower right side of assembly, and the 3rd module and four module lay respectively at the Ce He upper right side, lower-left of assembly.
5. amorphous silicon solar cell assembly as claimed in claim 1, is characterized in that, the area of described the first module is greater than the area of four module.
6. the manufacture method as the described amorphous silicon solar cell assembly of any one in claim 1-5, is characterized in that, comprises step:
Glass substrate is provided;
On glass substrate, form the TCO film;
The TCO film is carried out to the first laser grooving and scribing;
The deposited amorphous silicon layer;
Amorphous silicon layer is carried out to the second laser grooving and scribing;
The deposition dorsum electrode layer;
The first module and corresponding amorphous silicon layer and the dorsum electrode layer of the second module are carried out to the 3rd road laser grooving and scribing;
Dorsum electrode layer, amorphous silicon layer, TCO film are carried out to the 4th road laser grooving and scribing and form first, second, and third groove be communicated with.
7. the manufacture method of amorphous silicon solar cell assembly as claimed in claim 6, is characterized in that, the first groove is parallel to the formed laser scoring of the 3rd road laser grooving and scribing.
8. the manufacture method of amorphous silicon solar cell assembly as claimed in claim 6, is characterized in that, this second groove and the 3rd groove are respectively formed at upper left side and the lower right side of the first groove.
9. the manufacture method of amorphous silicon solar cell assembly as claimed in claim 6, is characterized in that, this second groove and the 3rd groove are respectively formed at the Ce He upper right side, lower-left of the first groove.
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| CN101743645A (en) * | 2007-07-13 | 2010-06-16 | 夏普株式会社 | Thin film solar cell module |
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| JP4758496B2 (en) * | 2009-05-15 | 2011-08-31 | シャープ株式会社 | Thin film solar cell module |
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