CN203339197U - Photovoltaic module - Google Patents
Photovoltaic module Download PDFInfo
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- CN203339197U CN203339197U CN2013204195372U CN201320419537U CN203339197U CN 203339197 U CN203339197 U CN 203339197U CN 2013204195372 U CN2013204195372 U CN 2013204195372U CN 201320419537 U CN201320419537 U CN 201320419537U CN 203339197 U CN203339197 U CN 203339197U
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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
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Abstract
The utility model provides a photovoltaic module, wherein solar cells are serially connected to form six cell strings including the same quantity of the solar cells, then the six cell strings are divided into three groups in pairs, the strings in each group are connected in parallel, the groups are connected in series, and a group of bypass diodes is connected for each group of the cell strings in parallel. The output power of the photovoltaic module adopting the circuit connection mode aforementioned is equal to the output power of a photovoltaic module in the prior art, the maximum working voltage of the photovoltaic module is only a half of the maximum working voltage of the photovoltaic module in the prior art, and the photovoltaic module can be directly applied to an independent photovoltaic system with a lower direct-current side voltage; and compared with the photovoltaic module in the prior art, the photovoltaic module provided by the utility model can realize more types of direct-current side voltages by virtue of a series of series connection or parallel connection. Therefore, the photovoltaic module provided by the utility model is suitable for more types of independent photovoltaic systems on the premise of keeping the invariable power density, and is wider in application range.
Description
Technical field
The utility model relates to the photovoltaic technology field, more particularly, relates to a kind of photovoltaic module.
Background technology
Solar cell is a kind of semiconductor device that sunlight is converted into to electric energy.What utilize due to its is reproducible sunlight, in use can not cause environmental pollution, so, under current energy shortage and the increasingly serious situation of environmental protection, solar cell has broad application prospects.
The solar cell of large-scale industrial production use comprises crystal silicon cell, hull cell etc. at present, wherein crystal silicon cell, because manufacturing technology is ripe, the electricity conversion advantages of higher, has occupied the market share of solar cell application field more than 80%.
Due to crystal silicon solar cell sheet itself easily broken, easily be corroded, if be directly exposed in atmosphere, its electricity conversion can be through moisture, the impact of dust, acid rain etc. and descending, so that damage, lost efficacy.Therefore, they must be packaged into to photovoltaic module just can come into operation.
Common Crystalline Silicon PV Module mainly comprises: laminate is coated on the frame of laminate surrounding, and is arranged at the photovoltaic junction box of laminate shady face.Wherein, laminate mainly comprises: the battery lamella be comprised of the multi-disc solar battery sheet, be positioned at the cover plate of battery lamella sensitive surface, be positioned at the backboard of battery lamella shady face, and the EVA(ethylene-vinyl acetate copolymer of bonding battery lamella and cover plate, battery lamella and backboard, ethylene-vinyl acetate copolymer) layer.
Make photovoltaic module it need be integrated into to photovoltaic system stably to customer power supply, that common photovoltaic system has is grid-connected, from several types such as net and hybrid systems.A kind of as in the net photovoltaic system of angle of solar battery system, be highly suitable for small-scale household electricity, and at present, the DC voltage of angle of solar battery system generally has the several types such as 12V, 24V, 48V, 110V and 220V.
In actual application; usually there will be following problem: for a kind of photovoltaic module; no matter between this assembly, take which kind of circuit connecting mode; still exist can't meet certain or certain several angle of solar battery system to the requirement of DC voltage may, there is larger limitation when photovoltaic module is applied in dissimilar angle of solar battery system.
The utility model content
The utility model provides a kind of photovoltaic module, to widen the range of application of photovoltaic module in various types of angle of solar battery systems.
For achieving the above object, the utility model provides following technical scheme:
A kind of photovoltaic module comprises:
Laminate, described laminate comprises the battery lamella be comprised of the multi-disc solar battery sheet, be positioned at the cover plate of described battery lamella sensitive surface, and be positioned at the backboard of described battery lamella shady face, wherein, described battery lamella comprises the first battery strings of being arranged in parallel～the 6th battery strings, identical and the mutual series connection of the solar battery sheet number that described the first battery strings～the every string of described the 6th battery strings comprises, described the first battery strings and the second battery series-parallel connection form first group, described the 3rd battery strings and the 4th battery series-parallel connection form second group, described the 5th battery strings and the 6th battery series-parallel connection form the 3rd group, described first group, mutually connect for second group and the 3rd group,
Be arranged at the photovoltaic junction box of laminate shady face, described photovoltaic junction box comprises the first bypass diode set, the second bypass diode set and the 3rd bypass diode set, described the first bypass diode set, the second bypass diode set and the 3rd bypass diode set all at least comprise a bypass diode, described the first bypass diode set with described first group in parallel, described the second bypass diode set with described second group in parallel, described the 3rd bypass diode set with described the 3rd group in parallel.
Preferably, the number of described the first battery strings～solar battery sheet that the every string of described the 6th battery strings comprises is 10.
Preferably, the number of described the first battery strings～solar battery sheet that the every string of described the 6th battery strings comprises is 12.
Preferably, described the first battery strings is adjacent with the second battery strings, and described the 3rd battery strings is adjacent with the 4th battery strings, and described the 5th battery strings is adjacent with the 6th battery strings.
Compared with prior art, technical scheme provided by the utility model at least has the following advantages:
Photovoltaic module provided by the utility model, do not change number and the arrangement mode of photovoltaic module solar battery sheet in prior art, but change the circuit connecting mode of solar battery sheet.Solar battery sheet is connected into to the same number of 6 string battery strings of every string, then 6 string battery strings is divided into to 3 groups in twos, in parallel between string and string in group, organize outer group with group between connect, be one group of bypass diode of every Battery pack connection in series-parallel simultaneously.Adopt between power output and same size in prior art and cell piece number and the cell piece of photovoltaic module of foregoing circuit connected mode the pure photovoltaic module be connected in series identical, its maximum working voltage is only half of maximum working voltage of photovoltaic module in prior art, can directly apply in the angle of solar battery system that DC voltage is lower, and photovoltaic module of the prior art is compared, the photovoltaic module in the utility model can be realized a greater variety of DC voltages through a series of serial or parallel connection.Therefore, photovoltaic module provided by the utility model can keep, under the constant prerequisite of power density, being applicable to more eurypalynous angle of solar battery system, and range of application is wider.
The accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The circuit connecting mode schematic diagram of the photovoltaic module of 60 solar battery sheets that Fig. 1 provides for the utility model embodiment mono-;
Fig. 2 is the schematic diagram connected between the photovoltaic module cell piece of 60 solar battery sheets providing of the utility model embodiment mono-.
Embodiment
As described in background, in prior art, the application of photovoltaic module in various types of angle of solar battery systems has larger limitation.The inventor studies discovery, produces the reason of this phenomenon mainly, and in prior art, the inner solar battery sheet of conventional photovoltaic module all adopts the circuit connecting mode of pure series connection.For this photovoltaic module, the maximum working voltage sum that its maximum working voltage is all cell pieces of himself comprising.As the photovoltaic module of 60 cell pieces of routine, the size of cell piece is generally 156mm * 156mm, and the maximum working voltage of monolithic battery sheet is the 0.5V left and right, and its maximum working voltage is 30V.In like manner, the maximum working voltage of the photovoltaic module of 72 cell pieces is 36V.And the DC voltage of angle of solar battery system generally has the several types such as 12V, 24V, 48V, 110V and 220V, conventional photovoltaic module to be subject to the restriction of himself maximum working voltage, will there be limitation in range of application.
For example, realize that a kind of photovoltaic module that angle of solar battery system the most often adopts is exactly the photovoltaic module of 60 cell pieces of pure series circuit, but the maximum working voltage of this photovoltaic module generally, in the 30V left and right, can't be applied to the angle of solar battery system that DC voltage is 12V.
For another example, the photovoltaic module of 72 cell pieces that maximum working voltage is 36V serial or parallel connection design in any case all can't reach the voltage of 48V, can't be applied to the angle of solar battery system that DC voltage is 48V.
Based on this, the utility model provides a kind of photovoltaic module, comprise: laminate, described laminate comprises the battery lamella be comprised of the multi-disc solar battery sheet, be positioned at the cover plate of described battery lamella sensitive surface, and be positioned at the backboard of described battery lamella shady face, wherein, described battery lamella comprises the first battery strings of being arranged in parallel～the 6th battery strings, identical and the mutual series connection of the solar battery sheet number that described the first battery strings～the every string of described the 6th battery strings comprises, described the first battery strings and the second battery series-parallel connection form first group, described the 3rd battery strings and the 4th battery series-parallel connection form second group, described the 5th battery strings and the 6th battery series-parallel connection form the 3rd group, described first group, mutually connect for second group and the 3rd group, be arranged at the photovoltaic junction box of laminate shady face, described photovoltaic junction box comprises the first bypass diode set, the second bypass diode set and the 3rd bypass diode set, described the first bypass diode set, the second bypass diode set and the 3rd bypass diode set all at least comprise a bypass diode, described the first bypass diode set with described first group in parallel, described the second bypass diode set with described second group in parallel, described the 3rd bypass diode set with described the 3rd group in parallel.
Photovoltaic module provided by the utility model, do not change number and the arrangement mode of photovoltaic module solar battery sheet in prior art, but change the circuit connecting mode of solar battery sheet.Solar battery sheet is connected into to the same number of 6 string battery strings of every string, then 6 string battery strings is divided into to 3 groups in twos, in parallel between string and string in group, organize outer group with group between connect, be one group of bypass diode of every Battery pack connection in series-parallel simultaneously.Adopt between power output and same size in prior art and cell piece number and the cell piece of photovoltaic module of foregoing circuit connected mode the pure photovoltaic module be connected in series identical, its maximum working voltage is only half of maximum working voltage of photovoltaic module in prior art, can directly apply in the angle of solar battery system that DC voltage is lower, and with photovoltaic module of the prior art, compare, the photovoltaic module in the utility model can be realized a greater variety of DC voltages through a series of serial or parallel connection.Therefore, photovoltaic module provided by the utility model can keep, under the constant prerequisite of power density (being unit are power), being applicable to more eurypalynous angle of solar battery system, and range of application is wider.
Be more than core concept of the present utility model, can more become apparent for making above-mentioned purpose of the present utility model, feature and advantage, below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.
A lot of details have been set forth in the following description so that fully understand the utility model, but the utility model can also adopt other to be different from alternate manner described here and implement, those skilled in the art can be in the situation that do similar popularization without prejudice to the utility model intension, so the utility model is not subject to the restriction of following public specific embodiment.
Secondly, the utility model is described in detail in conjunction with schematic diagram, when the utility model embodiment is described in detail in detail; for ease of explanation; the profile of indication device structure can be disobeyed general ratio and be done local the amplification, and described schematic diagram is example, and it should not limit the scope of the utility model protection at this.The three-dimensional space that in actual fabrication, should comprise in addition, length, width and the degree of depth.
Embodiment mono-
The present embodiment provides a kind of photovoltaic module of 60 solar battery sheets, and the number of the first battery strings described in this photovoltaic module～solar battery sheet that the every string of described the 6th battery strings comprises is 10.As shown in Figure 1, the first battery strings 101 and the second battery strings 102 parallel connections, because the first battery strings 101 and the second battery strings 102 are composed in series by 10 cell pieces, the maximum working voltage of supposing a slice cell piece is U, and the voltage at the branch road two ends that the first battery strings 101 and the second battery strings 102 parallel connections form is 10U; In like manner, the voltage at the branch road two ends that the 3rd battery strings 103 and the 4th battery strings 104 parallel connections form is 10U, and the voltage at the branch road two ends that the 5th battery strings 105 and the 6th battery strings 106 parallel connections form is 10U.Above 6 string battery strings 3 branch roads that form in parallel are in twos connected mutually, and the maximum working voltage of whole photovoltaic module (being between port one 1 and 12) is 30U.
And if cell piece adopts the circuit connecting mode of pure series connection in prior art, in prior art, the maximum working voltage of the photovoltaic module of 60 cell pieces is all cell piece both end voltage sums, be 60U, visible, half of the maximum working voltage that in the present embodiment, the maximum working voltage of the photovoltaic module of 60 cell pieces is the photovoltaic module of 60 cell pieces in prior art.
If solar battery sheet is for routine is of a size of 156mm * 156mm, short circuit current is the solar battery sheet that 8～9A, maximum working voltage are 0.5V, U=0.5V, adopting the maximum working voltage of photovoltaic module of 60 cell pieces of foregoing circuit connected mode is 15V, and in prior art, the maximum working voltage of the photovoltaic module of 60 cell pieces is 30V.
In addition, the branch road two ends that the first battery strings 101 and the second battery strings 102 parallel connections form are parallel with the first bypass diode set 107, the branch road two ends that the 3rd battery strings 103 and the 4th battery strings 104 parallel connections form are parallel with the branch road two ends that the second bypass diode set 108, the five battery strings 105 and the 6th battery strings 106 parallel connections form and are parallel with the 3rd bypass diode set 109.When certain a slice of photovoltaic module or a few cell pieces are blocked when hot spot effect occurs, with the bypass diode of the branch circuit parallel connection at the cell piece place that is blocked will conducting, the branch road at cell piece place of making to be blocked quits work, and usings and avoids the cell piece that is blocked to produce that heat causes the photovoltaic module local overheating and the damage that occurs as the load consumption electric energy.The quantity of the bypass diode that comprised separately for the first bypass diode set 107, the second bypass diode set 108 and the 3rd bypass diode set 109 that prevents hot spot effect should be no less than one.
The battery lamella connected into according to the foregoing circuit connected mode as shown in Figure 2, with the cell piece of the photovoltaic module of 60 cell pieces in prior art, arrange identical, it is 6 row 10 row that 60 solar battery sheets are arranged, 10 cell pieces of every row are composed in series 6 string battery strings mutually, are respectively the first battery strings 201, the second battery strings 202, the 3rd battery strings 203, the 4th battery strings 204, the 5th battery strings 205, the 6th battery strings 206.The first battery strings 201 and the second battery strings 202 compose in parallel first group 21, the three battery strings 203 and the 4th battery strings 204 compose in parallel second group 22, the, and five battery strings 205 and the 6th battery strings 206 compose in parallel the 3rd group 23.
The A binding post (not shown) of the positive pole of first group 21 in busbar aa ' introducing terminal box, the B binding post (not shown) of the negative pole of first group 21 in busbar bb ' introducing terminal box, be provided with the first bypass diode set that comprises at least one bypass diode between A binding post and B binding post; The B binding post of the positive pole of second group 22 in busbar bb ' introducing terminal box, the C binding post (not shown) of the negative pole of second group 22 in busbar cc ' introducing terminal box, be provided with the second bypass diode set that comprises at least one bypass diode between B binding post and C binding post; The C binding post of the positive pole of the 3rd group 23 in busbar cc ' introducing terminal box, the D binding post (not shown) of the negative pole of the 3rd group 23 in busbar dd ' introducing terminal box, be provided with the 3rd bypass diode set that comprises at least one bypass diode between C binding post and D binding post.The A binding post is as the cathode output end of photovoltaic module, and the D binding post is as the cathode output end output precision electric current of photovoltaic module.
In addition, the overlapping place 3 and 4 of the overlapping place 2 of the overlapping place 1 of busbar aa ' and cc ', busbar cc ' and bb ', busbar dd ' and bb ', and the contact portion of each busbar and solar battery sheet, all need respectively the isolating bar good with electrical insulating property (as EPE: the insulating material formed by the EVA+PET+EVA trilaminate material, the abbreviation that wherein PET is polyethylene terephthalate) to keep apart to prevent short circuit current.
In order to make the busbar that circuit connects, simplify, avoid the increase of unnecessary workload, in the present embodiment, preferably can make described the first battery strings 201 adjacent with the second battery strings 202, described the 3rd battery strings 203 is adjacent with the 4th battery strings 204, described the 5th battery strings 205 is adjacent with the 6th battery strings 206, more preferably makes the first battery strings 201～the 6th battery strings 206 be arranged in order as shown in FIG..
It should be noted that, the present embodiment only be take the arrangement mode of above-mentioned the first battery strings 201～the 6th battery strings 206 and is described as example, and the first battery strings 201～the 6th battery strings 206 is only its title, does not represent actual ordering.
If in order to build the low pressure angle of solar battery system that DC voltage is 12V, in the following way: the size constancy that keeps the photovoltaic module of the circuit connecting mode of pure series connection and 60 cell pieces, reduce cell piece number in photovoltaic module, the maximum working voltage of single photovoltaic module is reduced, realize the DC voltage of 12V.But this mode has reduced the power stage of the photovoltaic module of single former 60 cell pieces, reduced the power of its unit are, the cost of electricity-generating of photovoltaic system unit are is raise.
For the power density that as far as possible keeps assembly constant, can be when reducing the cell piece number, the size of dwindling photovoltaic module, make a kind of photovoltaic module, its cell piece number is less than the size that 60 and size are less than the photovoltaic module of former 60 cell pieces.Although this photovoltaic module still can reduce the maximum working voltage of single component, and the photovoltaic module of the more above-mentioned simple minimizing cell piece number of its power density is high, but because the sheet spacing between cell piece in photovoltaic module remains on 2mm～3mm, string spacing between battery strings is at 3mm～4.5mm, cell piece from side edge thereof the distance also be have standard code (in order to guarantee electrical security, Edge Distance can not lower than the regulation minimum value), therefore even reducing the cell piece number reduces size of components and makes the photovoltaic module than small dimension simultaneously, the photovoltaic module of more former 60 cell pieces of its power density still decreases.And adopt undersized photovoltaic module inevitably can make cost raise, in simple terms, if, by the photovoltaic module of 250W, make two photovoltaic modulies of 125W, various materials used must be more than the photovoltaic module of a 250W, and corresponding human cost also can raise.
Photovoltaic module provided by the utility model is with respect to the photovoltaic module of 60 cell pieces in prior art, its size and the cell piece number adopted and specification are all constant, what change is only the circuit connecting mode between cell piece, so the total power output of the photovoltaic module in the utility model is constant, the power density that is unit are is constant, and cost can not increase yet.The change of cell piece connected mode make the maximum working voltage of photovoltaic module of the present utility model become of the prior art half: 15V, coordinate photovoltaic controller, photovoltaic module in the utility model can be under power density and the constant prerequisite of cost, directly apply to the angle of solar battery system that DC voltage is 12V, widened the range of application of the photovoltaic module of 60 cell pieces.
Embodiment bis-
Based on core concept of the present utility model, the present embodiment provides a kind of photovoltaic module of 72 solar battery sheets, and the number of the first battery strings described in this photovoltaic module～solar battery sheet that the every string of described the 6th battery strings comprises is 12.Connected mode between its cell piece is identical with embodiment mono-, is still the first series connection connection of series connection more in parallel again, and difference is only the number of the solar battery sheet of the first battery strings～every string of described the 6th battery strings.
The maximum working voltage of photovoltaic module of taking 72 cell pieces of pure series system in prior art is the 36V left and right, what kind of electrical connection all can't realize the voltage of 48V through, that is to say, in prior art, the photovoltaic module of 72 cell pieces can't be applied to the angle of solar battery system that DC voltage is 48V.
The photovoltaic module that the present embodiment provides, the number of its size and cell piece is all identical with the photovoltaic module of 72 cell pieces in prior art, what change is the connected mode between each solar battery sheet, the present embodiment does not adopt traditional pure being connected in series, but adopt the circuit connecting mode identical with embodiment mono-, thereby make the maximum working voltage of the photovoltaic module in the present embodiment reduce to the 18V left and right.By three such photovoltaic modulies voltage that is connected in series together, it is about 54V, coordinate suitable photovoltaic controller, can keep power density and not increase under the prerequisite of cost to be directly applied for the photovoltaic system that DC side is 48V, thereby make the range of application of photovoltaic module of 72 cell pieces wider.
It should be noted that, the utility model only be take the photovoltaic module of 60 cell pieces and 72 cell pieces and is described as example, the similar photovoltaic module that also has other all sizes can be used circuit connecting mode provided by the utility model, make the maximum working voltage of assembly drop to original half, thereby widen the range of application in various types of angle of solar battery systems.
Although the utility model discloses as above with preferred embodiment, yet not in order to limit the utility model.Any those of ordinary skill in the art, do not breaking away from technical solutions of the utility model scope situation, all can utilize method and the technology contents of above-mentioned announcement to make many possible changes and modification to technical solutions of the utility model, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solutions of the utility model,, all still belong in the scope of technical solutions of the utility model protection any simple modification made for any of the above embodiments, equivalent variations and modification according to technical spirit of the present utility model.
Claims (4)
1. a photovoltaic module, is characterized in that, comprising:
Laminate, described laminate comprises the battery lamella be comprised of the multi-disc solar battery sheet, be positioned at the cover plate of described battery lamella sensitive surface, and be positioned at the backboard of described battery lamella shady face, wherein, described battery lamella comprises the first battery strings of being arranged in parallel～the 6th battery strings, identical and the mutual series connection of the solar battery sheet number that described the first battery strings～the every string of described the 6th battery strings comprises, described the first battery strings and the second battery series-parallel connection form first group, described the 3rd battery strings and the 4th battery series-parallel connection form second group, described the 5th battery strings and the 6th battery series-parallel connection form the 3rd group, described first group, mutually connect for second group and the 3rd group,
Be arranged at the photovoltaic junction box of laminate shady face, described photovoltaic junction box comprises the first bypass diode set, the second bypass diode set and the 3rd bypass diode set, described the first bypass diode set, the second bypass diode set and the 3rd bypass diode set all at least comprise a bypass diode, described the first bypass diode set with described first group in parallel, described the second bypass diode set with described second group in parallel, described the 3rd bypass diode set with described the 3rd group in parallel.
2. photovoltaic module according to claim 1, is characterized in that, the number of described the first battery strings～solar battery sheet that the every string of described the 6th battery strings comprises is 10.
3. photovoltaic module according to claim 1, is characterized in that, the number of described the first battery strings～solar battery sheet that the every string of described the 6th battery strings comprises is 12.
4. photovoltaic module according to claim 1, is characterized in that, described the first battery strings is adjacent with the second battery strings, and described the 3rd battery strings is adjacent with the 4th battery strings, and described the 5th battery strings is adjacent with the 6th battery strings.
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| CN2013204195372U CN203339197U (en) | 2013-07-15 | 2013-07-15 | Photovoltaic module |
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| CN2013204195372U CN203339197U (en) | 2013-07-15 | 2013-07-15 | Photovoltaic module |
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| CN104194021A (en) * | 2014-08-13 | 2014-12-10 | 苏州泰科尼光伏材料有限公司 | Production method and finished product of electrode insolating bar of solar battery module |
| CN104980103A (en) * | 2015-06-04 | 2015-10-14 | 浙江晶科能源有限公司 | Photovoltaic assembly and manufacturing method therefor |
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| CN104194021A (en) * | 2014-08-13 | 2014-12-10 | 苏州泰科尼光伏材料有限公司 | Production method and finished product of electrode insolating bar of solar battery module |
| CN104980103A (en) * | 2015-06-04 | 2015-10-14 | 浙江晶科能源有限公司 | Photovoltaic assembly and manufacturing method therefor |
| CN104980103B (en) * | 2015-06-04 | 2017-12-29 | 浙江晶科能源有限公司 | A kind of photovoltaic module and preparation method thereof |
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