CN209691768U - Total bypass protects crystalline silicon solar cell modules - Google Patents
Total bypass protects crystalline silicon solar cell modules Download PDFInfo
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- CN209691768U CN209691768U CN201920483999.8U CN201920483999U CN209691768U CN 209691768 U CN209691768 U CN 209691768U CN 201920483999 U CN201920483999 U CN 201920483999U CN 209691768 U CN209691768 U CN 209691768U
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- solar cell
- silicon solar
- crystalline silicon
- crystal silicon
- crystal
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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
The utility model relates to a kind of total bypass to protect crystalline silicon solar cell modules; it from top to bottom successively include packaged glass layer, first layer encapsulating material layer, crystal-silicon solar cell string, second layer encapsulating material layer and backsheet layer; it is characterized in that; crystal-silicon solar cell string is used to for the crystal silicon solar cell sheet one that the solar energy of absorption is converted into the electric energy externally exported being connected in series by N piece; N >=2 are parallel with the crystal silicon solar cell sheet two only used as PN junction on every crystal silicon solar cell sheet one.The utility model greatly reduces existing crystalline silicon solar cell modules power loss as caused by shadow occlusion, improves generated energy of the crystalline silicon component in the case where there is shadow occlusion.
Description
Technical field
The utility model relates to a kind of total bypass to protect crystalline silicon solar cell modules.
Background technique
Be likely to surface in power generation settings there is shadow occlusion to photovoltaic module outdoors.When one or several solar cell pieces
It is blocked, when other cell pieces are not blocked, the cell piece being blocked, which cannot not only generate electricity but also can become thermal resistance obstruction, to disappear
Consume electric energy caused by other normal battery pieces.The output power of entire component is caused substantially to decline in this way.
Currently in order to reducing loss of the photovoltaic module under shade, the cell piece in a photovoltaic module is divided into 3 sons
Battery strings, every sub- battery strings can at terminal box a bypass diode in parallel.It is blocked by shadow in group battery strings
Cell piece when, the output power of entire sub- battery strings declines, and the voltage at bypass diode both ends becomes larger, once reach other
The conducting voltage bypass diode of road diode is switched on, and entire sub- battery strings are short-circuited.Other normal two sub- battery strings
Electric current load will be output to by bypass diode, without being consumed again by the sub- battery strings that are blocked.
But current bypass protection technology can only protect sub- battery strings, can not be to each cell piece in component
It is protected.Have many cell pieces in sub- battery strings, when one of them or it is several block when parallel connection sub- battery strings herein
On bypass diode will be switched on.Although protecting other two sub- battery strings, also results in and do not have in this battery strings
The power loss for the cell piece being blocked by shadow.Existing method maximumlly shade screening cannot occur by effective protection percentage of batteries piece
Component output power when gear.
Utility model content
The purpose of this utility model is: realizing to the bypass protection of cell piece each in crystalline silicon solar cell modules, makes
When some cell piece is blocked in component, the power loss for the cell piece that other will not be caused not to be blocked.
In order to achieve the above object, there is provided a kind of total bypass to protect the crystalline silicon sun for the technical solution of the utility model
Battery component from top to bottom successively includes packaged glass layer, first layer encapsulating material layer, crystal-silicon solar cell string, the second layer
Encapsulating material layer and backsheet layer, which is characterized in that crystal-silicon solar cell string is used to convert the solar energy of absorption to pair by N piece
The crystal silicon solar cell sheet one of the electric energy of outer output is connected in series, N >=2, on every crystal silicon solar cell sheet one simultaneously
It is associated with the crystal silicon solar cell sheet two only used as PN junction.
Preferably, the volume of the crystal silicon solar cell sheet two is much smaller than the crystal silicon solar cell sheet one
Volume.
Preferably, the size range in the front and the back side of the crystal silicon solar cell sheet one be 125mm × 125mm~
200mm × 200mm, thickness range are 100 μm~200 μm；The front of the crystal silicon solar cell sheet two and the side at the back side
Long range is 1cm~2cm, areal extent 1cm2~4cm2。
Preferably, the crystal silicon solar cell sheet two passes through to waste and old crystal silicon solar cell sheet cutting process
It obtains.
Preferably, the front main grid of the crystal silicon solar cell sheet one and the crystal silicon solar cell sheet two
Back side main grid is longitudinally-aligned, and is connected by face bonding welding；The back side main grid of the crystal silicon solar cell sheet one with
The front main grid of the crystal silicon solar cell sheet two is longitudinally-aligned, and is welded to connect by back side welding.
Preferably, the crystal silicon solar cell sheet two is located at the corner of the crystal silicon solar cell sheet one, leads to
The face bonding band and the back side welding are crossed by the crystal silicon solar cell sheet two and the crystal silicon solar energy battery
Piece one is connected to become entirety.
It is compared with existing common photovoltaic module, the utility model can be played to each cell piece completely under shadow occlusion
Bypass protection effect.Existing crystalline silicon solar cell modules are greatly reduced in the case where 3 bypass diodes are protected, due to shade
A string of cell pieces caused by blocking, two string the cell piece even power losses of all batteries piece.The utility model is greatly promoted
Generated energy of the crystalline silicon component in the case where there is shadow occlusion.Further, the crystal silicon solar cell sheet two in utility model
From from old and useless battery piece, the effect that waste recovery utilizes is not only acted as, and take full advantage of component white space, improved
The utilization rate of assembly surface.
Detailed description of the invention
Fig. 1 is the crystalline silicon battery plate front connection schematic diagram of the utility model embodiment；
Fig. 2 is the crystalline silicon battery plate back side connection schematic diagram of the utility model embodiment；
Fig. 3 is the crystal silicon cell component internal cell piece series winding schematic diagram of the utility model embodiment；
Fig. 4 is the crystal silicon cell electric connecting relation schematic diagram of the utility model embodiment.
Description of symbols: 1- face bonding band, the back side 12- welding；Big battery piece: 2- front main grid, the back side 22- master
Grid, 3- flannelette, 4-n type area, 5-p type area, 6- Al-BSF；Baby battery piece: 7- front main grid, the back side 72- main grid, 11- flannelette,
13-n type area, 14-p type area, 15- Al-BSF；8- frame, 9- big battery piece, 10- baby battery piece.
Specific embodiment
The present invention will be further illustrated below in conjunction with specific embodiments.It should be understood that these embodiments are merely to illustrate this
Utility model rather than limitation the scope of the utility model.In addition, it should also be understood that, in the content for having read the utility model instruction
Later, those skilled in the art can make various changes or modifications the utility model, and such equivalent forms equally fall within this Shen
It please the appended claims limited range.
The utility model provides a kind of total bypass protection crystalline silicon solar cell modules, from top to bottom includes: encapsulation glass
Glass layer, first layer encapsulating material layer, crystal-silicon solar cell string, second layer encapsulating material layer, backsheet layer.
Packaged glass layer is to be embossed tempered glass or other tempered glass with a thickness of the low iron of 3.2mm ± 0.3mm, to the sun
Light direct beam projection is than being greater than 90%.
The material of the first layer encapsulating material layer and second layer encapsulating material layer is EVA or POE or other encapsulating materials.
The material of backsheet layer is the other materials such as TPT
In crystal-silicon solar cell string disclosed by the utility model, as shown in Figures 1 and 2, each big battery piece 9 is anti-
To a baby battery piece 10 in parallel, baby battery piece 10 plays the role of bypass diode.Each big battery piece 9 mutually string later
Connection forms crystal-silicon solar cell string.
Big battery piece 9 is single crystal silicon solar cell or more single crystal silicon solar cells, the front of big battery piece 9 and the ruler at the back side
Very little range is 125mm × 125mm~200mm × 200mm, and thickness range is 100 μm~200 μm.In the present embodiment, big battery
Piece 9 is crystal silicon solar battery with rounded corners, having a size of 125mm × 125mm or 156mm × 156mm, with a thickness of 180 μm~
200μm。
Baby battery piece 10 is the cell piece cut down from old and useless battery on piece or normal battery piece, the side of baby battery piece 10
Long range is 1cm~2cm, areal extent 1cm2~4cm2.The old and useless battery piece can be waste and old Monocrystalline silicon cell piece or
Person's polycrystalline silicon battery plate.In the present embodiment, baby battery piece 10 is isosceles right triangle shaped cells piece, right-angle side side length
Range is 1cm~2cm, areal extent 1cm2~4cm2.Its bevel edge optimized is arc, radius of corner and big battery piece 9
It is identical.
Each 9 one baby battery piece 10 of first reverse parallel connection of big battery piece, specific parallel method are as follows:
After cutting down baby battery piece 10 from old and useless battery on piece, the front and back sides of baby battery piece 10 are overturned for step 1.
Step 2, by the back side main grid 72 of the front main grid 2 of big battery piece 9 and baby battery piece 10 it is longitudinally-aligned after, with front
Welding 1 welds 9 front of big battery piece and 10 back side of baby battery piece, as shown in Figure 1.
By the front main grid 7 of the back side main grid 22 of big battery piece 9 and baby battery piece 10 it is longitudinally-aligned after, with back side welding 12
The front at the back side of big battery piece 9 and baby battery piece 10 is welded, as shown in Figure 2.
Subsequent each big battery piece 9 is serially connected, and forms crystal-silicon solar cell string, specific series connection method are as follows:
The face bonding band 1 of one big battery piece 9 is connected with the back side welding 12 of next big battery piece 9, forms tandem junction
Structure, as shown in Figure 3.
Each big battery piece 9 is serially connected to form crystal-silicon solar cell string after, crystal silicon cell component internal cell piece
Electrical series winding relation principle figure is as shown in Figure 4.
The utility model is from existing solar cell manufacture process process and theoretical modeling analysis, especially to waste and old electricity
Pond piece carries out cutting process, is then placed upside down the baby battery piece cut progress front and back sides, by crystal silicon big battery piece and small electricity
Pond piece is connected along front and back main grid with welding, forms a kind of parallel-connection structure.This structure makes baby battery piece become big
One PN junction in parallel of cell piece, when big battery piece is blocked, baby battery piece is switched on, and is played bypass to big battery piece and is protected
Shield effect.The baby battery piece of the utility model is derived from from old and useless battery piece or normal cell piece, not only acts as waste recovery
The effect utilized, and component white space is taken full advantage of, improve the utilization rate of assembly surface.The utility model not only meets
The current technological process of production is suitble to production, and incidental post is lower.Utility model bypass protection effect is fabulous, greatly
Ground reduces power loss of the component under shadow occlusion.
To solve the above-mentioned problems, the technical solution adopted in the utility model is: crystalline silicon described in the utility model is too
Each equal one small pieces cell piece of reverse parallel connection of big battery piece, plays the role of bypass diode in positive battery strings.It is each later
Big battery piece is serially connected, and forms battery strings.
Claims (6)
- It from top to bottom successively include packaged glass layer, first layer encapsulation 1. a kind of total bypass protects crystalline silicon solar cell modules Material layer, crystal-silicon solar cell string, second layer encapsulating material layer and backsheet layer, which is characterized in that crystal-silicon solar cell string It is used to for the crystal silicon solar cell sheet one that the solar energy of absorption is converted into the electric energy externally exported being connected in series by N piece, N >= 2, the crystal silicon solar cell sheet two only used as PN junction is parallel on every crystal silicon solar cell sheet one.
- 2. a kind of total bypass as described in claim 1 protects crystalline silicon solar cell modules, which is characterized in that the crystalline silicon The volume of solar battery sheet two is much smaller than the volume of the crystal silicon solar cell sheet one.
- 3. a kind of total bypass as described in claim 1 protects crystalline silicon solar cell modules, which is characterized in that the crystalline silicon The front of solar battery sheet one and the size range at the back side are 125mm × 125mm~200mm × 200mm, and thickness range is 100 μm~200 μm；The front of the crystal silicon solar cell sheet two and the side size range at the back side are 1cm~2cm, area model It encloses for 1cm2~4cm2。
- 4. a kind of total bypass as described in claim 1 protects crystalline silicon solar cell modules, which is characterized in that the crystalline silicon Solar battery sheet two is by obtaining waste and old crystal silicon solar cell sheet cutting process.
- 5. a kind of total bypass as described in claim 1 protects crystalline silicon solar cell modules, which is characterized in that the crystalline silicon The front main grid of solar battery sheet one and the back side main grid of the crystal silicon solar cell sheet two are longitudinally-aligned, and by just Face welding is welded to connect；The back side main grid of the crystal silicon solar cell sheet one and the crystal silicon solar cell sheet two Front main grid is longitudinally-aligned, and is welded to connect by back side welding.
- 6. a kind of total bypass as claimed in claim 5 protects crystalline silicon solar cell modules, which is characterized in that the crystalline silicon Solar battery sheet two is located at the corner of the crystal silicon solar cell sheet one, is welded by the face bonding band and the back side The crystal silicon solar cell sheet two is connected to become entirety with the crystal silicon solar cell sheet one by band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920483999.8U CN209691768U (en) | 2019-04-11 | 2019-04-11 | Total bypass protects crystalline silicon solar cell modules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920483999.8U CN209691768U (en) | 2019-04-11 | 2019-04-11 | Total bypass protects crystalline silicon solar cell modules |
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| CN209691768U true CN209691768U (en) | 2019-11-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112420874A (en) * | 2020-12-02 | 2021-02-26 | 中国电子科技集团公司第十八研究所 | Preparation method of solar cell module applied to near space aircraft |
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2019
- 2019-04-11 CN CN201920483999.8U patent/CN209691768U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112420874A (en) * | 2020-12-02 | 2021-02-26 | 中国电子科技集团公司第十八研究所 | Preparation method of solar cell module applied to near space aircraft |
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