CN109686799A - Solar cell module - Google Patents
Solar cell module Download PDFInfo
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- CN109686799A CN109686799A CN201910071592.9A CN201910071592A CN109686799A CN 109686799 A CN109686799 A CN 109686799A CN 201910071592 A CN201910071592 A CN 201910071592A CN 109686799 A CN109686799 A CN 109686799A
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- Prior art keywords
- solar cell
- diode
- solar
- solar battery
- battery sheet
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- 239000010409 thin film Substances 0.000 claims abstract description 59
- 239000010408 film Substances 0.000 claims description 39
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 20
- 239000004020 conductor Substances 0.000 claims description 20
- 229910052710 silicon Inorganic materials 0.000 claims description 20
- 239000010703 silicon Substances 0.000 claims description 20
- 239000000758 substrate Substances 0.000 claims description 12
- 239000013078 crystal Substances 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 7
- 239000011888 foil Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910021424 microcrystalline silicon Inorganic materials 0.000 claims description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 3
- 229920005591 polysilicon Polymers 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000007650 screen-printing Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims 1
- 230000031700 light absorption Effects 0.000 abstract description 7
- 238000010248 power generation Methods 0.000 abstract description 5
- 230000001276 controlling effect Effects 0.000 abstract description 4
- 238000005538 encapsulation Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/044—PV modules or arrays of single PV cells including bypass diodes
- H01L31/0443—PV modules or arrays of single PV cells including bypass diodes comprising bypass diodes integrated or directly associated with the devices, e.g. bypass diodes integrated or formed in or on the same substrate as the photovoltaic cells
-
- 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 invention discloses a kind of solar cell modules; it include: multiple concatenated integrated solar cell units; each integrated solar cell unit includes: solar battery sheet and a reverse protection diode; the reverse protection diode is a thin film diode; the thin film diode is integrated in the shady face of solar battery sheet, with solar battery sheet Opposite direction connection.The solar cell module had both realized the highly integrated of protection diode and solar battery sheet; the influence of shade and uneven light to the power of the solar cell module is also reduced simultaneously; and it can be by increasing light absorption using the uneven light of reflection; improve the generated energy of battery component; so as to shorten the period of cost recovery in power station; further, it is also possible to the electric current that it can bear is controlled by the size for the area for regulating and controlling thin film diode, the encapsulation and power generation without will affect component.
Description
Technical field
The disclosure belongs to field of renewable energy technology, is related to a kind of solar cell module, and especially one kind is integrated with
The solar cell module of solar battery sheet and reverse protection diode.
Background technique
Conventional reverse protection diode is power electronic devices, high pressure resistant, rectification characteristic is good, forward current is big, one
As encapsulated with small semiconductor element complexed metal, outer formation column or bulk.Due to can not be at high cost and shape
Solar battery sheet is integrated, (about 60), battery points 3 groups of current each battery component, mixes 3 reversed two poles across backboard
Pipe, to protect battery in component.However, the low open-circuit voltage needs of solar battery connect into component in the form of concatenated, because
This, component is sensitivity to shade and uneven optrode.
In order to reduce shadow effect, people use the method (MPPT) of MPPT maximum power point tracking, i.e. direct current transformation+algorithm
+ chip controls technology.This technology from the power station of beginning grade, organize tandem, develop to current component level.The MPPT of component level
It is optimizer, each component is furnished with 3, by the way that battery is cut half, divides 3 string mixing series-parallel, to maintain component output voltage not
Become.But the price of optimizer is in 0.5 yuan/watt or so, higher cost.
On the one hand, existing diode is mostly shell-and-tube, cannot achieve and is integrated in photovoltaic module；Conventional power two
Pole pipe setting will affect photovoltaic component encapsulating beside each solar battery, can not realize and collect inside photovoltaic module well
At.
On the other hand, it is contemplated that output voltage, monolithic battery output voltage it is low, and useful power be then high voltage and
Voltage is 220V and electric current < 10A in low current, such as civilian circuit, so photovoltaic module must be in such a way that battery be concatenated
To improve the output voltage of component.
However, the concatenated mode of battery requires each cell output current consistent, that is, in solar battery quality phase
The uniform illumination under the premise of, if there is the illumination of a piece of battery is blocked, entire component will be with the low electricity of this battery
Stream output, therefore, existing diode can not be integrated in photovoltaic module, and shade and light are unevenly to the output work of photovoltaic module
Rate influence is very big, how to also ensure that the output power of photovoltaic module becomes on the basis of integrated protection diode and needs
The technical issues of solution.
Summary of the invention
(1) technical problems to be solved
Present disclose provides a kind of solar cell modules, at least partly to solve technical problem set forth above.
(2) technical solution
According to one aspect of the disclosure, a kind of solar cell module is provided, comprising: multiple concatenated integrated sun
Energy battery unit, each integrated solar cell unit includes: solar battery sheet and a reverse protection diode, the reversed guarantor
Shield diode is a thin film diode, and the thin film diode is integrated in the shady face of solar battery sheet, with solar battery
Piece Opposite direction connection.
In some embodiments of the present disclosure, the back side of solar battery sheet is provided with rear electrode, the rear electrode packet
It includes: main grid and secondary grid, wherein secondary grid are vertical with main grid, an electrode of the corresponding thin film diode of each solar battery sheet
It fixes with a secondary grid of the solar battery sheet and is electrically connected with the pair grid.
In some embodiments of the present disclosure, the width of secondary grid along a first direction is width of the main grid along second direction
1.5-2 times, first direction is vertical with second direction；And/or each solar battery on piece is provided with two secondary grid, this two
Item pair grid are respectively at the position that two close end is leaned in solar cell back face, and the distance apart from both ends is the solar battery sheet edge
The 1%~5% of the size of first direction；And/or secondary grid arrive the distance at solar cell back face both ends along a first direction
Between 5mm-20mm；And/or rear electrode is made by screen printing mode.
In some embodiments of the present disclosure, the main grid between each integrated solar cell unit passes through the first conductor wire
It is connected in series, another electrode and adjacent integrated solar of the thin film diode on each integrated solar cell unit
The secondary grid of one second of battery unit are electrically connected by the second conductor wire, which is adjacent integrated solar-electricity
Secondary grid that are unlocked and being electrically connected corresponding thin film diode on pool unit；And/or each solar battery sheet is corresponding thin
Film diode is pasted on secondary grid by conducting resinl or allied substances and is fixed and is electrically connected.
In some embodiments of the present disclosure, the first conductor wire and the second conductor wire are the one or more of following material:
Welding, busbar or conductive foil.
In some embodiments of the present disclosure, it is placed with insulating paper below the second conductor wire, which makes the second conduction
The rear electrode of line and the solar battery sheet for being pasted with thin film diode is kept apart.
In some embodiments of the present disclosure, thin film diode is GaN film power diode, two pole of GaN film power
Pipe is N-shaped or p-type；And/or solar battery sheet includes: crystal silicon solar energy battery and thin film silicon solar cell, the crystalline substance
Body silicon solar cell includes: monocrystaline silicon solar cell and polysilicon solar cell, which includes:
Amorphous silicon thin-film solar cell, microcrystalline silicon film solar battery and multi-crystal silicon film solar battery.
In some embodiments of the present disclosure, the shape of GaN film power diode includes one kind or several of following shape
Kind: round, square, rectangle or irregular figure；And/or the size of GaN film power diode along a first direction is situated between
Between 6mm-100mm, the thickness of GaN film power diode is between 6mm-200mm；And/or work as solar battery sheet
When using p-type silicon as substrate, n-type doping area being emitter, the n-type area of GaN film power diode and the back of solar battery sheet
Face contact electrode；When solar battery sheet is emitter using n-type silicon as substrate, p-type doping area, two pole of GaN film power
The p-type area of pipe is in contact with the rear electrode of solar battery sheet.
In some embodiments of the present disclosure, thin film diode be by the film preparation of the epitaxial growth on a substrate at
PN junction after growing top electrode, separates the structure of extension with substrate using laser and the thin film diode that is formed.
In some embodiments of the present disclosure, which further includes terminal box, is integrated in the terminal box
N/2 shell-and-tube Schottky diode, includes N/2+1 binding post in the terminal box, and multiple integrated solar cell units are arranged
The array of M row, N column is arranged into, the integrated solar cell unit on each column is connected in series to form the first battery strings, per adjacent two
Going here and there first battery strings one end connects to form the second battery strings, is connected in series between the second all battery strings are two neighboring, and
Shell-and-tube Schottky diode is connected between the both ends of each the second battery strings, wherein M is the integer more than or equal to 1, N
For the even number greater than 1.
(3) beneficial effect
It can be seen from the above technical proposal that the solar cell module that the disclosure provides, has the advantages that
(1) office can reduce as reverse protection diode to each solar battery sheet thin film diode in parallel
It is increased caused by portion's shade by the temperature of shade battery, while solving and existing together when there is a solar battery sheet shade occur
A string of cell pieces under the protection of one backward dioded can not external output power the problem of, reduce the power of photovoltaic module
Loss.
(2) still the second battery of reservation protection in the case where each solar battery sheet and a reverse protection diodes in parallel
For the shell-and-tube Schottky diode of string as external bypass diode, can reduce to work as has multiple solar battery sheets by shade
When due to multiple corresponding protection backward diodeds simultaneously open caused by pressure drop, reduction power loss.
(3) reverse protection diode and solar energy are physically made as reverse protection diode using thin film diode
Cell piece is compatible on thickness, so that thin film diode is attached to solar battery by way of conductive glue in one embodiment
The shady face of piece, does not block sunlight, is not take up the light absorption area of solar battery sheet, does not influence the hair of solar battery sheet
Electricity work；In addition it can control the electric current that it can bear by the size for the area for regulating and controlling thin film diode, without
Influence the encapsulation and power generation of component.
(4) solar cell module of the disclosure can be improved by increasing light absorption using the uneven light of reflection
The generated energy of battery component, so as to shorten the period of cost recovery in power station.
Detailed description of the invention
Fig. 1 is front (light receiving surface) structural representation of the solar cell module according to shown in one embodiment of the disclosure
Figure.
Fig. 2 is the back side (shady face) structural schematic diagram of solar cell module as shown in Figure 1.
Fig. 3 is the thin film diode in solar cell module as shown in Figure 1 in each integrated solar cell unit
Connection relationship diagram between the connection relationship and two neighboring integrated solar cell unit of rear electrode.
Fig. 4 is the partial enlarged view of Fig. 3.
[symbol description]
1- solar battery sheet；2- reverse protection diode；
11- main grid；12- pair grid；
The first battery strings of 3-；The second battery strings of 4-；
5- shell-and-tube Schottky diode；The second conductor wire of 6-；
7- insulating paper.
Specific embodiment
Present disclose provides a kind of solar cell modules, pass through the shady face Opposite direction connection in each solar battery sheet
One thin film diode forms integrated solar cell unit, and all integrated solar electricity as reverse protection diode
Solar cell module is formed by series connection between pool unit, thin film diode does not influence the layout of original solar cell module
With light absorption area, shell-and-tube Schottky diode originally is retained as external bypass diode, in thin film diode
Under the duplicate protection of shell-and-tube Schottky diode, the height collection of protection diode and solar battery sheet had both been realized
At, while also reducing the influence of shade and uneven light to the power of the solar cell module.
For the purposes, technical schemes and advantages of the disclosure are more clearly understood, below in conjunction with specific embodiment, and reference
The disclosure is further described in attached drawing.In the disclosure, term " photovoltaic module " and " solar cell module " are this field
The common technical term of technical staff, the two meaning is equivalent, and term " Opposite direction connection " refers to the electrode and the sun of thin film diode
For the polarity of the electrode of energy cell piece on the contrary, one of them is N-shaped, another is p-type.Term " back side " indicates shady face, " just
Face " indicates light receiving surface.Element in specification or Figure of description, under the specific embodiment of a certain element and the element
It adopts and is indicated by the same numeral.
In first exemplary embodiment of the disclosure, a kind of solar cell module is provided.
Fig. 1 is front (light receiving surface) structural representation of the solar cell module according to shown in one embodiment of the disclosure
Figure.Fig. 2 is the back side (shady face) structural schematic diagram of solar cell module as shown in Figure 1.
Referring to figs. 1 and 2, the solar cell module of the disclosure, comprising: multiple concatenated integrated solar cells
Unit, each integrated solar cell unit includes: solar battery sheet 1 and a reverse protection diode 2, the reverse protection two
Pole pipe 2 is a thin film diode 2, and the thin film diode 2 is integrated in the shady face of solar battery sheet 1, with solar battery
1 Opposite direction connection of piece.
In the present embodiment, solar cell module, comprising: multiple concatenated integrated solar cell units, the solar energy
Battery component further includes terminal box, and N/2 shell-and-tube Schottky diode is integrated in the terminal box, includes N/ in the terminal box
2+1 binding post, multiple integrated solar cell units are arranged in the array of M row, N column, the integrated solar electricity on each column
Pool unit is connected in series to form the first battery strings 3, connects to form the second battery strings 4, institute per adjacent two string 3 one end of the first battery strings
It is connected in series between the second battery strings 4 having are two neighboring, and is connected with one between the both ends of each the second battery strings 4
Shell-and-tube Schottky diode 5, wherein M is the integer more than or equal to 1, and N is the even number greater than 1.
In some embodiments of the present disclosure, thin film diode 2 is GaN film power diode, two pole of GaN film power
Pipe is N-shaped or p-type, carries out example with p-type GaN film power diode in the present embodiment；And/or solar battery sheet 1 wraps
Include: crystal silicon solar energy battery and thin film silicon solar cell, which includes: monocrystaline silicon solar cell
And polysilicon solar cell, which includes: amorphous silicon thin-film solar cell, the microcrystalline silicon film sun
It can battery and multi-crystal silicon film solar battery.
In some embodiments of the present disclosure, thin film diode be by the film preparation of the epitaxial growth on a substrate at
PN junction after growing top electrode, separates the structure of extension with substrate using laser and the thin film diode that is formed.
Here by taking photovoltaic module/solar cell module comprising 60 p-type solar battery sheets as an example, this 60 sun
Energy cell piece connects to form the array of 10 rows 6 column, and M is 10, N 6 herein.Corresponding shell-and-tube Schottky diode number is 3
A, shell-and-tube Schottky diode is integrated in terminal box as a kind of bypass diode, includes 4 wiring in the terminal box
Column.At the back side of each solar battery sheet, correspondence is integrated with a reverse protection diode 2.Certainly, in other applied fields
Jing Zhong can carry out the number setting of integrated solar cell unit, corresponding reverse protection diode according to actual needs
Number setting and the number setting of the shell-and-tube Schottky diode in terminal box.
Fig. 3 is the thin film diode in solar cell module as shown in Figure 1 in each integrated solar cell unit
Connection relationship diagram between the connection relationship and two neighboring integrated solar cell unit of rear electrode.Fig. 4 is
The partial enlarged view of Fig. 3.
In conjunction with shown in Fig. 3 and Fig. 4, in some embodiments of the present disclosure, the back side of solar battery sheet is provided with the back side
Electrode, the rear electrode include: main grid 11 and secondary grid 12, wherein secondary grid 12 are vertical with main grid 11, each solar battery sheet 1
(solar battery sheet of the present embodiment is p-type to one electrode of corresponding thin film diode 2, and what is be correspondingly connected with is two pole of film
The cathode of pipe) fixed with one of the solar battery sheet secondary grid and with pair grid electric connection.
In some embodiments of the present disclosure, the width of secondary grid along a first direction is width of the main grid along second direction
1.5-2 times, first direction is vertical with second direction；And/or each solar battery on piece is provided with two secondary grid 12, this
Two secondary grid 12 are respectively at the position that two close end is leaned at 1 back side of solar battery sheet, and the distance apart from both ends is the solar-electricity
The 1%~5% of the size of pond piece along a first direction；And/or secondary grid arrive solar cell back face both ends along a first direction
Distance between 5mm-20mm；And/or rear electrode is made by screen printing mode.
In the present embodiment, specifically, the electrode (electrode including front and back) of the solar battery sheet 1 passes through silk
It is prepared by the mode of wire mark brush.Main grid and vertical with main grid is provided in the front electrode of solar battery sheet in the prior art
Thin grid, the disclosure it is creative propose a kind of back side for being set to solar battery sheet, as rear electrode main grid 11 and with
The secondary grid 12 of vertical two, in one example, the width of the pair grid is 1.5-2 times of width of main grid, for fixing film
Diode 2 is simultaneously attached with an electrode of the thin film diode 2.
In some embodiments of the present disclosure, the main grid between each integrated solar cell unit passes through the first conductor wire
It is connected in series, another electrode of the thin film diode on each integrated solar cell unit (is thin in the present embodiment
The anode of film diode) electrically connect by the second conductor wire with one second of adjacent integrated solar battery cell secondary grid
It connects, which is pair that is unlocked and being electrically connected corresponding thin film diode on adjacent integrated solar battery cell
Grid；And/or the corresponding thin film diode of each solar battery sheet is pasted on secondary grid by conducting resinl or allied substances and is carried out
It fixes and is electrically connected.
In the present embodiment, the first conductor wire and the second conductor wire are the one or more of following material: welding, busbar,
Or conductive foil.
In the present embodiment, as shown in Figure 1,10 solar battery sheets of each column pass through weldering in solar battery chip arrays
Main grid is connected in series to form the first battery strings 3 by band, and adjacent/two string 3 one end of the first battery strings of two column is serially connected in the second electricity
Pond string 4, is connected in series between the second all battery strings 4 are two neighboring, and connect between the both ends of each the second battery strings 4
It is connected to a shell-and-tube Schottky diode 5.
For example, the 6 column solar battery sheets of the present embodiment are connected in series to form 6 the first battery strings of string 3, two neighboring battery
Going here and there 3 one end connects into 3 the second battery strings of string 4, this 3 string, second battery strings 4 per two adjacent second battery strings 4 between gone here and there
Connection connection, ultimately forms the photovoltaic array of series connection, obtains the solar cell module, pre- at the both ends of the second battery strings 4
Anode and negative wire are reserved, the terminal box with binding post is correspondingly connected with, 3 shell-and-tube Schottky is integrated in the terminal box
Diode 5, each shell-and-tube Schottky diode 5 and the both ends of each the second battery strings 4 are connected in series.
In the present embodiment, it is thin that GaN successively is fixed with conducting resinl on a secondary grid at the back side of each solar battery sheet 2
Film power diode, then with welding 6 or conductive foil (the second conductor wire 6) by the GaN film power diode and it is adjacent too
Positive energy cell piece 2 is carried out connected by the second secondary grid.In the present embodiment, as shown in figure 4, being placed with below the second conductor wire 6 absolutely
Edge paper 7, the insulating paper 7 keep apart the second conductor wire 6 and the rear electrode for the solar battery sheet for being pasted with thin film diode.
So corresponding to each solar battery sheet has a reverse protection diode to be protected as a kind of bypass diode, simultaneously
For every a string of second battery strings, there is shell-and-tube Schottky diode to be protected as a kind of bypass diode, realizes double
It protects again.
To each solar battery sheet thin film diode in parallel as reverse protection diode, local yin can reduce
It is increased caused by shadow by the temperature of shade battery, while solving and existing together when there is a solar battery sheet shade occur one
A string of lower cell pieces of backward dioded protection can not external output power the problem of, the power for reducing photovoltaic module damages
It loses.The still shell of the second battery strings of reservation protection in the case where each solar battery sheet and a reverse protection diodes in parallel
Formula Schottky diode can reduce when there is multiple solar battery sheets by shade as external bypass diode due to more
Pressure drop caused by a corresponding protection backward dioded is opened simultaneously reduces power loss, whole to realize duplicate protection, both realizes
Protection diode and solar battery sheet it is highly integrated, while also reducing shade and uneven light to the solar battery
The influence of the power of component.
The case where common solar battery sheet 1 is also classified into p-type and two kinds of N-shaped, and the present embodiment is with p-type solar battery sheet
Example is carried out, correspond to electric connection is the cathode of thin film diode, realizes Opposite direction connection, each integrated solar cell unit
On the anode of thin film diode pass through the progress of the second conductor wire with one second of adjacent integrated solar battery cell secondary grid
It is electrically connected.In other embodiments, when for N-shaped solar battery sheet, the positive and corresponding institute of GaN film power diode
The secondary grid of solar battery sheet pass through conductive gluing knot, the cathode of GaN film power diode passes through welding or conductive foil
Be connected with the second of another adjacent solar battery sheet the secondary grid, the second secondary grid on adjacent integrated solar battery cell not
Fix and be electrically connected the secondary grid of corresponding thin film diode.
In some embodiments of the present disclosure, the shape of GaN film power diode includes one kind or several of following shape
Kind: round, square, rectangle or irregular figure；And/or the size of GaN film power diode along a first direction is situated between
Between 6mm-100mm, the thickness of GaN film power diode is between 6mm-200mm；And/or work as solar battery sheet
When using p-type silicon as substrate, n-type doping area being emitter, the n-type area of GaN film power diode and the back of solar battery sheet
Face contact electrode；When solar battery sheet is emitter using n-type silicon as substrate, p-type doping area, two pole of GaN film power
The p-type area of pipe is in contact with the rear electrode of solar battery sheet.
The disclosure, as reverse protection diode, physically makes reverse protection diode and the sun using thin film diode
Energy cell piece is compatible on thickness, so that thin film diode is attached to solar-electricity by way of conductive glue in one embodiment
The shady face of pond piece, does not block sunlight, is not take up the light absorption area of solar battery sheet, does not influence solar battery sheet
Power generation operation；In addition it can control the electric current that it can bear by the size for the area for regulating and controlling thin film diode, without
It will affect the encapsulation and power generation of component.In addition, solar cell module can be by increasing light using the uneven light of reflection
It absorbs, the generated energy of battery component is improved, so as to shorten the period of cost recovery in power station.
In conclusion passing through the backlight in each solar battery sheet present disclose provides a kind of solar cell module
Opposite direction connection one thin film diode in face forms integrated solar cell unit, and all collection as reverse protection diode
Solar cell module is formed by series connection between solar battery cell, thin film diode does not influence original solar battery
The layout and light absorption area of component, shell-and-tube Schottky diode originally are retained as external bypass diode,
Under the duplicate protection of thin film diode and shell-and-tube Schottky diode, protection diode and solar battery sheet are both realized
It is highly integrated, while also reducing the influence of shade and uneven light to the power of the solar cell module, and can lead to
The uneven light using reflection is crossed to increase light absorption, improves the generated energy of battery component, so as to shorten the cost recovery in power station
Phase, further, it is also possible to the electric current that it can bear be controlled by the size for the area for regulating and controlling thin film diode, without will affect
The encapsulation and power generation of component.
It should be noted that similar or identical part all uses identical figure number in attached drawing or specification description.It is attached
The implementation for not being painted or describing in figure is form known to a person of ordinary skill in the art in technical field.In addition, though this
Text can provide the demonstration of the parameter comprising particular value, it is to be understood that parameter is equal to corresponding value without definite, but can connect
It is similar to be worth accordingly in the error margin or design constraint received.The direction term mentioned in embodiment, for example, "upper", "lower",
"front", "rear", "left", "right" etc. are only the directions with reference to attached drawing.Therefore, the direction term used is for illustrating not to use
To limit the scope of the invention.
Also, to realize the clean and tidy purpose of drawing, some known usual structures and component may be with simple in attached drawing
The mode of signal is painted it.In addition, the feature of part slightly may amplify or change its ratio or size in the attached drawing of this case,
To achieve the purpose that be easy to understand the technical characteristic with the viewing disclosure, but this is not intended to limit the disclosure.According to the present invention
The actual size and specification of product manufactured by disclosure of that should be can be according to the spy of demand, product itself when producing
Property and collocation content of this disclosure adjust accordingly, stated in this.
The word of ordinal number such as " first ", " second ", " third " etc. used in specification and claim, with modification
Corresponding element, itself is not meant to that the element has any ordinal number, does not also represent the suitable of a certain element and another element
Sequence in sequence or manufacturing method, the use of those ordinal numbers are only used to enable an element and another tool with certain name
Clear differentiation can be made by having the element of identical name.
Furthermore word "comprising" or " comprising " do not exclude the presence of element or step not listed in the claims.Positioned at member
Word "a" or "an" before part does not exclude the presence of multiple such elements.
Particular embodiments described above has carried out further in detail the purpose of the disclosure, technical scheme and beneficial effects
Describe in detail it is bright, it is all it should be understood that be not limited to the disclosure the foregoing is merely the specific embodiment of the disclosure
Within the spirit and principle of the disclosure, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the disclosure
Within the scope of shield.
Claims (10)
1. a kind of solar cell module characterized by comprising multiple concatenated integrated solar cell units, Mei Gesuo
Stating integrated solar cell unit includes:
Solar battery sheet and a reverse protection diode, the reverse protection diode are a thin film diode, the film two
Pole pipe is integrated in the shady face of the solar battery sheet, with the solar battery sheet Opposite direction connection.
2. solar cell module according to claim 1, which is characterized in that the back side of the solar battery sheet is arranged
There is rear electrode, which includes: main grid and secondary grid, wherein the pair grid are vertical with main grid, each solar battery sheet
One electrode of corresponding thin film diode and a secondary grid of the solar battery sheet are fixed and are electrically connected with the pair grid.
3. solar cell module according to claim 2, which is characterized in that
The pair grid width along a first direction is main grid along 1.5-2 times of the width of second direction, first direction and the
Two directions are vertical；And/or
Each solar battery on piece is not equipped with two secondary grid, this two secondary grid are respectively at solar cell back face close to two
The position at end, the distance apart from both ends are the 1%~5% of the size of the solar battery sheet along a first direction；And/or
The pair grid arrive the distance at solar cell back face both ends between 5mm-20mm along a first direction；And/or
The rear electrode is made by screen printing mode.
4. solar cell module according to claim 2, which is characterized in that
Main grid between each integrated solar cell unit is connected in series by the first conductor wire, each collection
At another electrode of the thin film diode on solar battery cell and one second of adjacent integrated solar battery cell
Secondary grid are electrically connected by the second conductor wire, which is unlocked and electric on adjacent integrated solar battery cell
Property connects the secondary grid of corresponding thin film diode；And/or
The corresponding thin film diode of each solar battery sheet is pasted on secondary grid by conducting resinl or allied substances to carry out
It fixes and is electrically connected.
5. solar cell module according to claim 4, which is characterized in that first conductor wire and the second conductor wire
For the one or more of following material: welding, busbar or conductive foil.
6. solar cell module according to claim 4, which is characterized in that be placed with below second conductor wire absolutely
Edge paper, the insulating paper keep apart the second conductor wire and the rear electrode for the solar battery sheet for being pasted with thin film diode.
7. solar cell module according to claim 1, which is characterized in that
The thin film diode is GaN film power diode, and the GaN film power diode is N-shaped or p-type；With/
Or,
The solar battery sheet includes: crystal silicon solar energy battery and thin film silicon solar cell, crystal silicon solar electricity
Pond includes: monocrystaline silicon solar cell and polysilicon solar cell, which includes: amorphous silicon membrane is too
Positive energy battery, microcrystalline silicon film solar battery and multi-crystal silicon film solar battery.
8. solar cell module according to claim 7, which is characterized in that
The shape of the GaN film power diode includes the one or more of following shape: round, square, rectangle or
Irregular figure；And/or
The size of the GaN film power diode along a first direction is between 6mm-100mm, the GaN film power
The thickness of diode is between 6mm-200mm；And/or
When the solar battery sheet is emitter using p-type silicon as substrate, n-type doping area, the GaN film power diode
N-type area be in contact with the rear electrode of the solar battery sheet；When the solar battery sheet is using n-type silicon as substrate, p-type
When doped region is emitter, the p-type area of the GaN film power diode connects with the rear electrode of the solar battery sheet
Touching.
9. solar cell module according to any one of claim 1 to 8, which is characterized in that the thin film diode
It is that the structure of extension is made using laser after growing top electrode at PN junction by the film preparation of the epitaxial growth on a substrate
The thin film diode for separating and being formed with substrate.
10. solar cell module according to any one of claim 1 to 8, which is characterized in that
The solar cell module further includes terminal box, and N/2 shell-and-tube Schottky diode, institute are integrated in the terminal box
Stating includes N/2+1 binding post in terminal box, and the multiple integrated solar cell unit is arranged in the array of M row, N column；
Wherein, the integrated solar cell unit on each column is connected in series to form the first battery strings, per adjacent the first electricity of two strings
Pond goes here and there one end and connects to form the second battery strings, is connected in series between the second all battery strings are two neighboring, and each
Shell-and-tube Schottky diode is connected between the both ends of two battery strings, wherein M is the integer more than or equal to 1, and N is greater than 1
Even number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910071592.9A CN109686799A (en) | 2019-01-24 | 2019-01-24 | Solar cell module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910071592.9A CN109686799A (en) | 2019-01-24 | 2019-01-24 | Solar cell module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109686799A true CN109686799A (en) | 2019-04-26 |
Family
ID=66194677
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910071592.9A Pending CN109686799A (en) | 2019-01-24 | 2019-01-24 | Solar cell module |
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| Country | Link |
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| CN (1) | CN109686799A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112825337A (en) * | 2019-11-21 | 2021-05-21 | 江苏宜兴德融科技有限公司 | Flexible solar cell array |
| CN114244247A (en) * | 2021-11-03 | 2022-03-25 | 中国华能集团清洁能源技术研究院有限公司 | Photovoltaic system and wind-solar hybrid power station |
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