CN207925489U - A kind of solar cell and its component - Google Patents
A kind of solar cell and its component Download PDFInfo
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- CN207925489U CN207925489U CN201820836347.3U CN201820836347U CN207925489U CN 207925489 U CN207925489 U CN 207925489U CN 201820836347 U CN201820836347 U CN 201820836347U CN 207925489 U CN207925489 U CN 207925489U
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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 kind of solar cell and its component.The solar cell includes battery chip and the electrode that is arranged on the first face of the battery chip and the second face, and the structure of the battery chip is symmetrical, and the structure of the first face of the battery chip and the electrode on the second face is symmetrical.The solar cell module further includes the encapsulated layer being arranged outside the solar cell, and the structure of the encapsulated layer is symmetrical.The solar cell module has high two-sided rate and generated energy, is suitable for more application places.
Description
Technical field
The utility model is related to but be not limited to area of solar cell, and in particular, to but be not limited to a kind of solar-electricity
Pond and its component.
Background technology
With the fast development of solar battery technology, the demand that people use solar battery product is more and more,
Requirement to generating efficiency is higher and higher.
Conventional crystal silicon solar battery component mostly uses single side battery, front setting main gate line and secondary grid line, the back side
Back electrode is set, and when packaged for the preferable encapsulating material of sun light incident surface generally use light transmittance, but shady face is more
Using the back veneer material that the translucency such as float glass are poor, light utilization efficiency is low.Conventional crystal silicon solar battery component uses
Unsymmetric structure, it is more demanding to installation site, setting angle, it is limited to the design feature of battery component, in vertical installation, east
To waiting under mounting conditions, battery component generating efficiency is impacted greatly in west.
Utility model content
It is the general introduction of the theme to being described in detail herein below.This general introduction is not to limit the protection model of claim
It encloses.
The inventor of the utility model has found on the basis of being careful studied to the prior art, for generating electricity on two sides
Solar cell, according to conventional front, the electrode and conventional crystalline silicon solar battery assembly of back side unsymmetric structure
Packaged type, the generated output of cell backside will be extremely limited, and can not play the advantage of generating electricity on two sides.
In order to solve the above-mentioned technical problem, the utility model provides a kind of solar cell, including battery chip and sets
The electrode on the first face of battery chip and the second face is set, the structure of battery chip is symmetrical, the first face of battery chip and
The structure of electrode on two faces is symmetrical.
In some embodiments, electrode include can be with main gate line and secondary grid line.
In some embodiments, the quantity of main gate line can be 3~5, such as can be 4, and width can be
0.5mm~0.9mm, such as can be 0.6mm, 0.7mm, 0.8mm；Secondary grid line quantity can be 70~100, such as can be with
It it is 80,90, width can be 25 μm~40 μm, such as can be 30 μm, 35 μm.
Grid line setting excessively can cause solar cell incidence surface to block excessively, influence cell power generation ability；Grid line is arranged
The very few collection that can influence electric current.When selecting the quantity of main gate line to be 3~5, width is 0.5mm~0.9mm, secondary grid line
Quantity is 70~100, and when width is 25 μm~40 μm, it is rational simultaneous can so that shading ratio and electric conductivity obtain
It cares for, solar cell properties are optimized.
In some embodiments, relative to the first face of battery chip or the second face, the shading-area of electrode can be
600mm2~1000mm2, shading ratio can be 2%~4%.
The printed patterns of the first face of battery chip and the second face top electrode are all made of identical pattern, can increase battery
Light-receiving area, two-sided rate are more than 95%, improve generated energy.
In the present invention, term " two-sided rate " refers to：Solar cell module, the second face (back side) generated output with
The ratio of the first face (front) generated output.
In some embodiments, battery chip may include：
Crystal silicon layer；
Intrinsic layer on the first face and the second face of crystal silicon layer is set；
Doped layer on the intrinsic layer in the first face of crystal silicon layer and the second face is set；
Transparency conducting layer on the doped layer in the first face of crystal silicon layer and the second face is set.
In some embodiments, crystal silicon layer can be monocrystalline silicon layer, such as：P type single crystal silicon layer, n type single crystal silicon layer
Deng；Thickness can be 70 μm~300 μm, such as can be 120 μm, 140 μm, 160 μm, 180 μm, 200 μm, 220 μm, 240 μm.
In the exemplary embodiment, the thickness of crystal silicon layer can be 180 μm.
In some embodiments, intrinsic layer can be intrinsic amorphous silicon layer, such as：Intrinsical hydrogenated amorphous silicon layer etc.；
Thickness can be 1nm~20nm, such as can be 4nm, 8nm, 12nm, 15nm, 18nm.
Thicker intrinsic layer may bring the increase of solar cell series resistance, while hinder the transmission of sunlight,
Lead to the deterioration of short circuit current and whole efficiency；And relatively thin intrinsic layer may weaken built in field, lead to open-circuit voltage
Deteriorate.The thickness of intrinsic layer can be controlled appropriately, and in the exemplary embodiment, the thickness value of intrinsic layer can be 12nm, should
The intrinsic layer of thickness is more advantageous to the properties for improving solar cell relative to the intrinsic layer of other thickness.
In some embodiments, doped layer can be amorphous silicon layer, the doping on the intrinsic layer in the first face of crystal silicon layer
Layer can be P-type non-crystalline silicon layer, and the doped layer on the intrinsic layer in the second face of crystal silicon layer is N-type non-crystalline silicon layer；Alternatively, crystalline silicon
Doped layer on the intrinsic layer in the first face of layer can be N-type non-crystalline silicon layer, the doped layer on the intrinsic layer in the second face of crystal silicon layer
For P-type non-crystalline silicon layer.
In some embodiments, P-type non-crystalline silicon layer can be p-type hydrogenated amorphous silicon layer etc.；Thickness can be 1nm~
20nm, such as can be 4nm, 8nm, 10nm, 12nm, 15nm, 18nm.N-type non-crystalline silicon layer can be N-type hydrogenated amorphous silicon layer
Deng；Thickness can be 1nm~20nm, such as can be 4nm, 8nm, 10nm, 12nm, 15nm, 18nm.
If the thickness of doped layer is excessive, the increase of solar cell series resistance may be brought, while hindering sunlight
Transmission, lead to the deterioration of short circuit current and whole efficiency；If thickness is too small, it may be impossible to form the enough built-in electricity of intensity
, lead to the deterioration of open-circuit voltage.In the exemplary embodiment, the thickness of P-type non-crystalline silicon layer can be 10nm, N-type amorphous
The thickness of silicon layer can be 10nm.
In some embodiments, transparency conducting layer can be including transparent conducting oxide layer, such as：Indium tin oxide layer, aluminium
The zinc oxide film etc. of doping, thickness can be 5nm~100nm, such as can be 20nm, 40nm, 60nm, 80nm.Exemplary
In embodiment, transparency conducting layer can be 80nm.
In the present invention, " structure of the battery chip is symmetrical " refers to the layer centered on crystal silicon layer, in crystalline substance
The first face of body silicon layer and the second face are symmetrically arranged with the layer with the same function of identical quantity.For example, the first face of crystalline silicon is set
It is equipped with one layer of intrinsic layer, the second face of crystalline silicon will also be provided with one layer of intrinsic layer, be arranged on the intrinsic layer in the first face of crystal silicon layer
There is one layer of doped layer, one layer of doped layer is also provided on the intrinsic layer in the second face of crystal silicon layer, and so on.
But " structure of the battery chip is symmetrical " the not material to layer with the same function and thickness shape
At restriction.The intrinsic layer in the first face of crystal silicon layer and the second face uses identical material, thickness can be the same or different；It is brilliant
The doped layer in the first face of body silicon layer and the second face uses different materials, thickness can be the same or different；Crystal silicon layer
Identical material may be used with the transparency conducting layer in the second face on one side can also use different materials, and thickness can be identical
It can be different.
Since the symmetry of battery chip is related with the two-sided rate of battery, the symmetry of battery chip is higher, pair of battery
Face rate is then higher, and the generating efficiency of battery is also higher, therefore the intrinsic layer in the first face of crystal silicon layer and the second face should be made to adopt as possible
With identical thickness, doped layer uses identical thickness, transparency conducting layer to use identical material and thickness.
In the present invention, " structure of the first face of the battery chip and the electrode on the second face is symmetrical " refer to
Layer centered on crystal silicon layer, the electrode on the first face of crystal silicon layer and the second face are symmetrically arranged using identical pattern, but not
The electrode for limiting the first face of crystal silicon layer and the second face is made of identical material.For example, the first face of crystal silicon layer and
Electrode on second face uses identical pattern, and the main gate line of identical quantity, interval, width and height is arranged, identical number is arranged
Amount is spaced, the secondary grid line of width and height；Identical material may be used in electrode on the first face of crystal silicon layer and the second face
Different materials may be used.
Since the symmetry of electrode is related with the two-sided rate of battery, the symmetry of electrode is higher, and the two-sided rate of battery is then got over
The generating efficiency of height, battery is also higher, therefore the electrode in the first face of battery chip and the second face should be made to use identical material as possible
Material.
The utility model additionally provides a kind of solar cell module comprising above-mentioned solar cell.
In some embodiments, solar cell module can also include setting in the first face of above-mentioned solar cell and
Encapsulated layer on second face, and the structure of the first face of solar cell and the encapsulated layer on the second face is symmetrical.
In some embodiments, encapsulated layer may include being arranged in the foreboard in the first face of solar cell and setting too
The backboard in the second face of positive energy battery, foreboard and backboard are identical.
The foreboard and backboard of solar cell module are all made of high translucent material and are made, and the light transmittance of high translucent material can be with
To be more than 91%.Foreboard and backboard are using identical high transparent encapsulant material, the identical thickness of setting so that solar battery group
The front and back of part can preferably absorb sunlight, and front and back generating effect is very close.
In some embodiments, high translucent material can be selected from very white rolled glass, ultra-white float glass, tetrafluoroethene
Without any one in fabric substrate membrane material and poly terephthalic acid class plastics, such as：Ethylene tetrafluoroethylene may be used
(ethylene-tetra-fluoro-ethylene, ETFE), polyethylene terephthalate (poly ethylene
Terephthalate, PET).If foreboard and backboard are made of very white rolled glass or ultra-white float glass, thickness can be
2mm~3.2mm, such as can be 2mm, 3mm；If foreboard and backboard without fabric substrate membrane material and are gathered to benzene two by tetrafluoroethene
Any one in formic acid class plastics is made, and thickness can be 0.3mm~2mm, such as can be 0.5mm, 1mm.
If the thickness of foreboard, backboard is excessive, translucency is influenced；If thickness is too small, the work of protection solar cell is not had
With.When the thickness of foreboard, backboard selects in thickness range as described above, it can make translucency and the protection to battery
It is reasonably taken into account, solar cell properties are optimized.
When foreboard and backboard are all made of very white rolled glass, better translucency can be obtained, solar cell is made
Generated output bigger.
In some embodiments, encapsulated layer can also include the first glued membrane being arranged between foreboard and solar cell
Layer and the second adhesive film being arranged between backboard and solar cell.
Adhesive film can be selected from ethylene-vinyl acetate copolymer (ethylene vinyl acetate, EVA) glued membrane,
Elastomer (polyolefin elastomer, the POE) glued membrane and polyvinyl butyral (polyvinyl of polyolefin copolymer
Butyral, PVB) any one in glued membrane, thickness can be 0.4mm~1.0mm, such as can be 0.5mm, 0.8mm.
In the present invention, " structure of the first face of the solar cell and the encapsulated layer on the second face is symmetrical "
Refer to centered on crystal silicon layer layer, the first face of crystal silicon layer and the second face be symmetrically arranged with identical quantity have identical work(
The encapsulated layer of energy.For example, the first face of crystal silicon layer is provided with one layer of adhesive film, the second face of crystal silicon layer will also be provided with one layer of glue
Film layer is provided with foreboard on the adhesive film in the first face of crystal silicon layer, backboard is provided on the adhesive film in the second face of crystal silicon layer.Its
In, foreboard and backboard use identical high translucent material, and identical thickness is arranged.But not to the material of adhesive film and thickness
Degree, which is formed, to be limited, and the first adhesive film and the second adhesive film may be used identical material and can also use different materials, thickness
It can be the same or different.
Since the symmetry of encapsulated layer is related with the two-sided rate of battery, the symmetry of encapsulated layer is higher, the two-sided rate of battery
Then higher, the generating efficiency of battery is also higher, therefore the first adhesive film and the second adhesive film should be made to use identical material as possible,
Identical thickness is set.
The utility model has advantageous effect in that compared with prior art：
1) symmetry of structure：Full symmetric battery component, the first face (front), the second face (back side) are used as light-receiving surface
Excellent performance can be played, generated energy is increased；
2) high two-sided rate：Front, the back side of battery component are all made of high transparent encapsulant material so that battery component is just
Face, the back side can preferably absorb sunlight, and front, back side generating effect are very close, have high two-sided rate；
3) it is suitable for more application places, is highly suitable for the stronger installation site of backside reflection, east-west direction, vertical peace
Dress etc..
Other features and advantages of the utility model will illustrate in the following description, also, partly from specification
In become more fully apparent, or understood by implementing the utility model.The purpose of this utility model and other advantages can pass through
Specifically noted structure is realized and is obtained in specification, claims and attached drawing.
Description of the drawings
Attached drawing is used for providing further understanding technical solutions of the utility model, and a part for constitution instruction,
With for explaining the technical solution of the utility model, do not constituted to the utility model technology together with the embodiments of the present invention
The limitation of scheme.
Fig. 1 is the structure chart of the solar cell of the utility model embodiment；
Fig. 2 is the structure chart of the electrode of the utility model embodiment；
Fig. 3 is the structure chart of the solar cell module of the utility model embodiment.
In figure：1. crystal silicon layer；2. intrinsic layer；3.P type amorphous silicon layers；4.N type amorphous silicon layers；5. transparency conducting layer；6.
Electrode；7. main gate line；8. secondary grid line；9. solar cell；10. the first adhesive film；11. the second adhesive film；12. foreboard；13. the back of the body
Plate.
Specific implementation mode
To make the purpose of this utility model, technical solution and advantage be more clearly understood, below in conjunction with attached drawing to this
The embodiment of utility model is described in detail.It should be noted that in the absence of conflict, the implementation in the utility model
Feature in example and embodiment mutually can be combined arbitrarily.
The utility model embodiment provides a kind of solar cell, and the battery is the solar cell of symmetrical configuration,
The electrode of battery chip and symmetrical configuration including symmetrical configuration.
The utility model embodiment provide solar battery structure as shown in Figure 1, for symmetrical configuration solar cell,
Including crystal silicon layer 1, the symmetrical intrinsic layer 2 on the first face and the second face of crystal silicon layer 1 is set；It is arranged in crystal silicon layer
Doped layer on 1 the first face and the intrinsic layer 2 in the second face, for example, the P-type non-crystalline silicon layer 3 on the first face, the N on the second face
Type amorphous silicon layer 4；Symmetrical transparency conducting layer 5 on the doped layer in the first face of crystal silicon layer 1 and the second face is set；Setting
Electrode 6 on the transparency conducting layer 5 in the first face of crystal silicon layer 1 and the second face.
Intrinsic layer 2 on the first face and the second face of crystal silicon layer 1 uses identical material, and identical or different thickness is arranged
Degree.
P-type non-crystalline silicon layer 3 on first face of crystal silicon layer 1 and the N-type non-crystalline silicon layer 4 on the second face of crystal silicon layer 1
Identical or different thickness can be set.
Identical or different material may be used in transparency conducting layer 5 on the first face and the second face of crystal silicon layer 1, setting
Identical or different thickness.
The electrode structure that the utility model embodiment provides is as shown in Fig. 2, electrode 6 includes main gate line 7 and secondary grid line 8.
Identical or different material may be used in electrode 6 on the first face and the second face of monocrystalline silicon layer, and printing is identical
The main gate line 7 of identical quantity, interval, width and height is arranged in pattern, and the secondary grid of identical quantity, interval, width and height are arranged
Line 8.
In the first face of the symmetrical battery chip of above structure and the second symmetrical electrode of face setting structure, to be tied
The symmetrical solar cell of structure.
The solar cell module structure that the utility model embodiment provides is as shown in figure 3, in one or a plurality of series connection
And/or first adhesive film 10 is set on the first face of the symmetrical solar cell of in parallel above structure 9, at one or a plurality of
The second adhesive film 11 is set on second face of the symmetrical solar cell of above structure 9 of series connection and/or parallel connection, in the first glued membrane
Foreboard 12 is set on layer 10, backboard 13 is set on the second adhesive film 11.
Identical or different material may be used in first adhesive film 10 and the second adhesive film 11, and identical or different thickness is arranged
Degree.
Foreboard 12 and backboard 13 use identical high translucent material, and identical thickness is arranged.
Embodiment 1
1, the solar battery chip of symmetrical structure
Crystal silicon layer：P type single crystal silicon layer is chosen, thickness is 180 μm；
Intrinsic layer：Using physical vaporous deposition, the symmetrically deposition intrinsic on the first face and the second face of crystal silicon layer
Type hydrogenated amorphous silicon layer, thickness are 12nm；
Doped layer：Using physical vaporous deposition, p-type hydrogenated amorphous silicon layer is deposited on the intrinsic layer in the first face, the
Deposited n-type hydrogenated amorphous silicon layer on the intrinsic layer in two faces, thickness are 10nm；
Transparency conducting layer：Using physical vaporous deposition, the symmetrically deposited oxide in p-type doped layer and n-type doping layer
Indium tin layer, thickness are 80nm；
The battery chip of symmetrical structure is prepared.
2, the solar cell of symmetrical structure
The electrode that symmetrical structure is prepared on the first face and the second face of above-mentioned battery chip, is printed using silk screen print method
Silver paste forms main gate line and secondary grid line, and the solar cell of symmetrical structure is prepared.
The quantity of the main gate line in the first face and the second face is 4, and width is 0.8mm, and interval is 39mm；
The quantity of the secondary grid line in the first face and the second face is 78, and width is 40 μm, and interval is 2mm.
3, the solar cell module of symmetrical structure
By 60 above-mentioned solar cell series connection, identical EVA is laminated on the first face and the second face of concatenated battery
Glued membrane forms the first adhesive film and the second adhesive film, and identical ultrawhite calendering glass is laminated on the first adhesive film and the second adhesive film
Glass forms foreboard and backboard, then carries out hot pressing, the solar cell module of symmetrical structure is prepared.
First adhesive film and the second glued membrane layer thickness are 0.5mm；
The thickness of foreboard and backboard is 3.2mm, and light transmittance is 92%.
Comparative example 1
1, battery chip
Battery chip is prepared according to the method for embodiment 1.
2, solar cell
Electrode is prepared on the first face and the second face of above-mentioned battery chip, master is formed using silk screen print method printing silver paste
Grid line and secondary grid line, are prepared solar cell.
The quantity of the main gate line in the first face (front) is 4, width 0.8mm；The quantity of secondary grid line is 78, and width is
40μm；
The quantity of the main gate line in the second face (back side) is 4, width 1.1mm；The quantity of secondary grid line is 180, width
It is 70 μm.
3, solar cell module
By 60 above-mentioned solar cell series connection, EVA adhesive film shape is laminated on the first face and the second face of concatenated battery
At the first adhesive film and the second adhesive film, folds very white rolled glass on the first adhesive film upper layer and form foreboard, in the second adhesive film
Upper stacking float glass forms backboard, then carries out hot pressing, solar cell module is prepared.
The performance comparison for the solar cell module that the utility model embodiment 1 and comparative example 1 are prepared such as 1 institute of table
Show.
The performance comparison of the different solar cell modules of table 1
| Embodiment 1 | Comparative example 1 | |
| Back side main gate line shading-area (mm2) | 29712 | 40854 |
| Back side pair grid line shading-area (mm2) | 28969.2 | 64995 |
| The total shading gross area (mm in the back side2) | 58681.2 | 105849 |
| Back side shading ratio (%) | 3.98% | 7.18% |
| Two-sided rate (%) | >95% | 91% |
As it can be seen from table 1 the solar cell module that the utility model embodiment 1 is prepared, the screening of backplate
Light ratio is less than 4%, much smaller than the shading ratio for the solar cell module backplate that comparative example 1 is prepared, and it is two-sided
Rate is up to 95% or more, substantially increases the generated energy of battery.
Although the embodiment disclosed by the utility model is as above, the content only the utility model for ease of understanding
And the embodiment used, it is not limited to the utility model.Technical staff in any the utility model fields,
Under the premise of not departing from the spirit and scope disclosed by the utility model, it can be carried out in the form and details of implementation any
Modification and variation, but the scope of patent protection of the utility model, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of solar cell, the solar cell includes battery chip and setting in the first face of the battery chip and the
Electrode on two faces, the structure of the battery chip be it is symmetrical, the first face of the battery chip and the electrode on the second face
Structure is symmetrical.
2. solar cell according to claim 1, wherein the electrode includes main gate line and secondary grid line.
3. solar cell according to claim 2, wherein the quantity of the main gate line is 3~5, and width is
0.5mm~0.9mm；The quantity of the pair grid line is 70~100, and width is 25 μm~40 μm.
4. solar cell according to claim 1, wherein relative to the first face of the battery chip or the second face, institute
The shading-area for stating electrode is 600mm2~1000mm2, shading ratio is 2%~4%.
5. according to the solar cell described in any one of claim 1-4, wherein the battery chip includes：
Crystal silicon layer；
Intrinsic layer on the first face and the second face of the crystal silicon layer is set；
Doped layer on the intrinsic layer in the first face of the crystal silicon layer and the second face is set；
Transparency conducting layer on the doped layer in the first face of the crystal silicon layer and the second face is set.
6. a kind of solar cell module, the solar cell module includes according to any one of claims 1-5
Solar cell.
7. solar cell module according to claim 6, the solar cell module further include setting it is described too
Positive encapsulated layer that can be on the first face of battery and the second face, and the first face of the solar cell and the encapsulated layer on the second face
Structure is symmetrical.
8. solar cell module according to claim 7, wherein the encapsulated layer includes being arranged in the solar-electricity
The foreboard in the first face of pond and the backboard in the second face of the solar cell is set, the foreboard and the backboard are identical.
9. solar cell module according to claim 8, wherein the foreboard and the backboard use high light transmission material
Material, the high translucent material are selected from very white rolled glass, ultra-white float glass, tetrafluoroethene without fabric substrate membrane material and poly- pair
Any one in Phthalic acids plastics.
10. solar cell module according to claim 8 or claim 9, wherein the encapsulated layer further includes being arranged before described
The first adhesive film between plate and the solar cell and be arranged between the backboard and the solar cell second
Adhesive film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820836347.3U CN207925489U (en) | 2018-05-31 | 2018-05-31 | A kind of solar cell and its component |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820836347.3U CN207925489U (en) | 2018-05-31 | 2018-05-31 | A kind of solar cell and its component |
Publications (1)
| Publication Number | Publication Date |
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| CN207925489U true CN207925489U (en) | 2018-09-28 |
Family
ID=63595726
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| Country | Link |
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2018
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