CN104821781B - A kind of solar cell - Google Patents
A kind of solar cell Download PDFInfo
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- CN104821781B CN104821781B CN201510284577.4A CN201510284577A CN104821781B CN 104821781 B CN104821781 B CN 104821781B CN 201510284577 A CN201510284577 A CN 201510284577A CN 104821781 B CN104821781 B CN 104821781B
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- collecting lens
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- switch element
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- 230000003071 parasitic effect Effects 0.000 claims abstract description 16
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 15
- 239000011248 coating agent Substances 0.000 claims description 7
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- 238000000034 method Methods 0.000 description 4
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
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- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229910017083 AlN Inorganic materials 0.000 description 1
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Inorganic materials [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 1
- CSSYLTMKCUORDA-UHFFFAOYSA-N barium(2+);oxygen(2-) Chemical compound [O-2].[Ba+2] CSSYLTMKCUORDA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- 229920000647 polyepoxide Polymers 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/1563—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators without using an external clock
-
- 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
- Y02E10/52—PV systems with concentrators
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a kind of solar cell, it includes light collection modular converter and boost module, the boost module is made up of a kind of booster circuit for reducing voltage switch stress, the booster circuit for reducing voltage switch stress includes the voltage Vin being input into by light collection modular converter, switch element S1, S2, diode D1, D2, inductance L, input capacitance C1, intermediate capacitance C2 and output capacitance Co, input power produces input voltage vin, and switch element S1, S2 have parasitic capacitance C respectivelyS1、CS2, by the turn-on and turn-off of controlling switch element S1, S2, solar cell output voltage is improve, while reducing energy loss.
Description
【Technical field】
The present invention relates to solar cell, specifically one kind reduces voltage switch stress and output voltage is high-tension
Solar cell.
【Background technology】
In solar power system, due to the offer of monolithic solar cell is all the relatively low direct current of voltage, it is impossible to
Meet the need for electricity of existing electrical equipment, grid-connected requirement can not be met, it is therefore desirable to which low voltage and direct current is converted to
The high voltage direct current being actually needed.Thus high-gain, the booster converter of stable performance turn into a study hotspot, and the research is right
The development of photovoltaic cell industry is promoted to have a very big significance.
Most basic booster converter is single tube Boost, but the boosting scope of this converter is extremely limited,
It is difficult to meet the conversion requirement of high-gain, and switch tube voltage stress is output voltage.
At present, improving existing booster converter mainly has following several：
The first is to utilize transformer, and a transformer for high frequency is added in the middle of original DC-DC converter, is led to
Cross and change the purpose that transformer voltage ratio realizes high gain boost.Now, the conversion process of electric energy is actually by original direct current-straight
Stream, is changed into DC-AC-AC-DC, the energy conversion efficiency reduction of whole system.
Second is to utilize coupling inductance, but coupling inductance complex structure, is unfavorable for industrial processes, it is difficult to ensure circuit
Uniformity, and switching device voltage stress can be caused too high, brings electromagnetic interference etc. to influence, cause converter working loss compared with
Greatly.
The third is to add cascaded Boost unit, and unit number is more, and voltage gain is bigger, but circuit elements number of packages is more, knot
Structure is more complicated.
5th kind is crisscross parallel DC-DC converter, and it includes two inductance, two fly-wheel diodes, two work(
Rate switching tube, the drain electrode of the first power switch pipe is connected with the anode of the first diode and one end of the first inductance, the second power
The drain electrode of switching tube is connected with the anode of the second diode and one end of the second inductance, the other end of the first inductance and the second inductance
The other end be connected.This boost interleaved parallel DC-DC converter output voltage gain is smaller, the electricity of power switch pipe
Compression is larger, and power switch pipe works for hard switching, and switching loss is larger, and the reverse recovery current of fly-wheel diode is larger,
Reverse recovery loss is larger.
6th kind is soft switch circuit, therefore, in recent years, researcher have studied some soft switch circuits in succession, mainly
There are two classes：One class is that the Sofe Switch of power switch pipe is realized by devices such as additional active power switch and passive inductance, electric capacity；
The another kind of Sofe Switch for being to be realized by the device such as additional diode and passive inductance, electric capacity power switch pipe, such as the institute of accompanying drawing 1
Show.Although the Sofe Switch that can realize power switch pipe of this two classes method, additional circuit is complicated, and can not reduce work(
The voltage stress of rate switching tube.
Also a kind of DC boosting matrix circuit being made up of electric capacity, diode, triode, as shown in Figure 2, that is, exports
Only in one end of the first row electric capacity and one end of last column electric capacity, input power and matrix are only for the connection of power supply and matrix
One end of one column capacitance and one end of last column capacitance are connected by triode, and the electric capacity with adjacent 2 row of a line is in the same direction by 2
The diode of diodes in parallel and adjacent 2 row is to share diode, each electric capacity series aiding connection of same row and in last column
One end of electric capacity is connected with 2 diodes, is that every electric capacity of same a line can be allowed to be formed to charge back by appropriate control method
2 triodes on road are simultaneously turned on, and the triode of the triode and last column capacitance for being connected to the first column capacitance is corresponded
Conducting causes that each row electric capacity is wheel current charge.But the elements such as switch, electric capacity, diode needed for this booster circuit are too many,
Cause circuit structure complexity, cost too high.
【The content of the invention】
The technical problems to be solved by the invention, are directed to defect and deficiency in aforementioned background art, there is provided a kind of defeated
Go out high-tension solar cell, improve output voltage, reduce energy loss.
The present invention includes light collection modular converter and boost module.
The light collection modular converter includes：
The carrying module of solar chip, light-collecting lens and the carrying light-collecting lens, the light-collecting lens have relative
Upper surface and lower surface, it is characterised in that, it is described carrying module there is pedestal, the pedestal opens up fluted, the sun
Can chip be fixed on the bottom of the groove, the bottom of the groove and position corresponding with the solar chip offers
Some radiating guide holes, the radiating guide hole leads to the solar chip, and the light-collecting lens are contained in the groove, and institute
State light-collecting lens to be fixed on the pedestal, the lower surface of the light-collecting lens is towards the solar chip, the condenser
The lower surface of piece is provided with multiple optical scattering structures relative to the part of the solar chip.
There is the air gap between the multiple optical scattering structure and the solar chip.
The light collection modular converter further includes retaining element, and be fixed on for the light-collecting lens by the retaining element
On the pedestal.
Thermal coefficient of expansion of the thermal coefficient of expansion of the retaining element less than the light-collecting lens.
The carrying module further has load bearing seat, and the load bearing seat is housed in the groove around the solar energy
Chip is set, and the load bearing seat carries the light-collecting lens being contained in the groove.
The loading end that the load bearing seat carries the light-collecting lens is coated with reflectance coating.
The light-collecting lens have the side of the connection upper surface and the lower surface, and the side is coated with reflection
Film.
The boost module is made up of a kind of booster circuit for reducing voltage switch stress；
Boost module of the invention includes the input voltage vin that light collection modular converter is produced, switch element S1, S2, two
Pole pipe D1, D2, inductance L, input capacitance C1, intermediate capacitance C2 and output capacitance Co.Due to the characteristic of switching device, switch element
S1, S2 have parasitic capacitance C respectivelyS1、CS2.Specifically annexation is：One end of the positive pole connection inductance L of input voltage vin and
The negative terminal of input capacitance C1, colelctor electrode, the positive level of diode D1, switch element of the other end connecting valve element S1 of inductance L
The colelctor electrode of the emitter stage connecting valve element S2 of S1, the emitter stage of switch element S2 connects the negative pole of input voltage vin, middle
One end of electric capacity C2 connects the negative electrode of diode D1, and the emitter stage of other end connecting valve element S1, the anode of diode D2 connects
Connect the negative electrode of diode D1, the anode of the negative electrode connection input capacitance C1 of diode D2, one end two poles of connection of output capacitance Co
The negative electrode of pipe D2, the other end of output capacitance Co connects the negative pole of input voltage vin, and produces output voltage at its two ends
Vout, switch element S1, S2 constitute switch element branch road, and diode D1, D2 constitute diode branch, switch element branch road and two
Pole pipe branch road is not simultaneously turned in synchronization.
Switch element S can be IGBT or MOSFET, and diode is fast recovery diode or Schottky diode；
By the turn-on and turn-off of controlling switch element S1, S2, switch element S1, S2 can be made while realizing boost function
Voltage drop between collector and emitter greatly reduces its voltage stress no more than the 50% of output voltage, and relative to
Prior art switching device is few, reduces the conduction loss and switching loss of global switch pipe, further reduces the whole of converter
Body is lost, and simple structure, noenergy losser in circuit improves the operating efficiency of converter.
【Brief description of the drawings】
Fig. 1：Existing crisscross parallel dc-dc converter circuit structure chart；
Fig. 2：Existing DC boosting matrix circuit structure chart；
Fig. 3：Structural representation with boost module of the invention；
Fig. 4：Booster circuit first stage working condition with low-voltage switches stress of the invention；
Fig. 5：Booster circuit second stage working condition with low-voltage switches stress of the invention；
Fig. 6：Booster circuit phase III working condition with low-voltage switches stress of the invention；
Fig. 7：Booster circuit fourth stage working condition with low-voltage switches stress of the invention；
Fig. 8：The stage working condition of booster circuit the 5th with low-voltage switches stress of the invention.
Fig. 9：Light collection modular converter structural representation of the present invention
【Specific embodiment】
From the figure 3, it may be seen that the booster circuit of low-voltage switches stress of the invention includes the electricity of light collection modular converter input
Pressure Vin, switch element S1, S2, diode D1, D2, inductance L, input capacitance C1, intermediate capacitance C2 and output capacitance Co.Due to
The characteristic of switching device, switch element S1, S2 have parasitic capacitance C respectivelyS1、CS2。
Structure of the invention is elaborated with reference to accompanying drawing 3, specific annexation is：The positive pole of input voltage vin connects
Connect one end of inductance L and the negative terminal of input capacitance C1, colelctor electrode, the diode D1 of the other end connecting valve element S1 of inductance L
Positive level, the colelctor electrode of the emitter stage connecting valve element S2 of switch element S1, switch element S2 emitter stage connection input electricity
Press the negative pole of Vin, the negative electrode of one end connection diode D1 of intermediate capacitance C2, the emitter stage of other end connecting valve element S1,
The negative electrode of the anode connection diode D1 of diode D2, the anode of the negative electrode connection input capacitance C1 of diode D2, output capacitance
One end of Co connects the negative electrode of diode D2, and the other end of output capacitance Co connects the negative pole of input voltage vin, and at its two ends
Produce output voltage Vout.
4-8 is illustrated to the working condition of the booster circuit below in conjunction with the accompanying drawings：
First stage, as shown in Figure 4：Switch element S1, S2 are both turned on, and switching branches are in the conduction state, inductance electricity
Stream ILSwitch element S1, S2 will be flowed through, electric current flows to the negative of input voltage vin from the positive pole of input voltage vin by inductance L
Pole；Without diode D1, D2, diode branch is off；
Second stage, as shown in Figure 5：Switch element S1 is turned on, switch element S2 shut-offs, due to the pass of switch element S2
It is disconnected, cause switching branches to be off, inductive current will flow to input capacitance C1 and output capacitance by diode D1, D2
Co, diode branch is in the conduction state, and capacitance state now is intermediate capacitance C2 and parasitic capacitance CS2With output after series connection
Electric capacity Co and diode D2 series arms are in parallel；Reach intermediate capacitance C2 and parasitic capacitance C after stable stateS2Respective voltage will be defeated
The 50% of the output voltage gone out on electric capacity Co.
Phase III, as shown in Figure 6：Switch element S1 shut-offs, switch element S2 shut-offs, due to switch element S1, S2
Shut-off, cause switching branches still in off-state, inductive current will continue through diode D1, D2 and flow to input capacitance C1
With output capacitance Co, still in conducting state, capacitance state now is (1) intermediate capacitance C2 and parasitic capacitance to diode branch
CS2It is in parallel with output capacitance Co and diode D2 series arms after series connection；(2) parasitic capacitance CS1With intermediate capacitance C2 and diode
D1 series arms are in parallel, reach intermediate capacitance C2 and parasitic capacitance C after stable stateS2Respective voltage is by for defeated on output capacitance Co
Go out the 50% of voltage, parasitic capacitance CS1Voltage for intermediate capacitance C2 voltage, be also the output voltage on output capacitance Co
50%.
Fourth stage, as shown in Figure 7：Switch element S1 conductings, switch element S2 shut-offs, due to the pass of switch element S2
It is disconnected, cause switching branches still in off-state, it is assumed that the circuital current is in continuous mode, inductive current will continue through two
Pole pipe D1, D2 flows to input capacitance C1 and output capacitance Co, and diode branch is still in conducting state, capacitance state now
For：(1) intermediate capacitance C2 and parasitic capacitance CS2In parallel with output capacitance Co and diode D2 series arms after series connection, (2) are parasitic
Electric capacity CS1Two ends are in short circuit state due to the conducting of switch element S1；Reach intermediate capacitance C2 and parasitic capacitance C after stable stateS2
Respective voltage will be 50% of the output voltage on output capacitance Co, parasitic capacitance CS1Voltage will be down to 0 by releasing；
5th stage, as shown in Figure 8：Switch element S1 conductings, switch element S2 conductings, due to switch element S1.S2
Conducting, cause switching branches to return to conducting state, inductive current ILSwitch element S1, S2 will be flowed through, electric current is from input voltage
The positive pole of Vin flows to the negative pole of input voltage vin by inductance L；Because diode D1, D2 bear reverse pressure drop, diode branch
Road will be changed into being off state, and capacitance state now is：(1) intermediate capacitance C2 is temporarily in the parasitic electricity of suspended state (2)
Hold CS2Two ends are in short circuit state due to the conducting of switch element S2；Intermediate capacitance C2 is because voltage can not be mutated after reaching stable state
It will be temporarily 50% of the output voltage on output capacitance Co, parasitic capacitance CS1、CS2Voltage will be down to 0 by releasing；
Above-mentioned stage repetitive cycling is the course of work of the booster circuit, in whole process, by switch element S1,
Voltage between S2 collector and emitters greatly reduces its voltage stress no more than the 50% of output voltage, and relative to
Prior art switching device is few, reduces the conduction loss and switching loss of global switch pipe, further reduces the whole of converter
Body is lost, and simple structure, noenergy losser in circuit improves the operating efficiency of converter.
As shown in Figure 9, light collection modular converter, it includes that one piece of light-collecting lens 1, carries module 2 and solar energy core
Piece 4.
The light-collecting lens 1 have relative upper surface 11 and a lower surface 12, and connect the upper surface 11 with it is described under
The side 13 on surface 12.In the present embodiment, the upper surface 11 is convex surface, and the lower surface 12 is convex surface.May be appreciated
It is that the light-collecting lens 1 can also be that upper surface 11 is plane for convex surface, lower surface 12, and upper surface 11 is convex surface, lower surface 12
It is concave surface, upper surface 11 is that plane, lower surface 12 are convex surface, or upper surface 11 is that concave surface, lower surface 12 are the eyeglass on convex surface,
As long as eyeglass can realize optically focused on the whole.
Preferably, the side 13 of light-collecting lens 1 is coated with chromium reflectance coating, silver-colored reflectance coating or aluminium mirror coating, thus, can increase into
Enter the utilization rate of the light in light-collecting lens 1.
In order to reduce the thickness of light-collecting lens 1, light-collecting lens 1 can only have relative upper surface 11 and lower surface 12, and not have
There is the side 13 of connection upper surface 11 and lower surface 12.
Preferably, the light-collecting lens 1 are made up of the exotic material of high-penetration rate, the exotic material be glass,
Epoxy resin, acrylic acid or polyimides.
The carrying module 2 has pedestal 21, positive electrode 22 and negative electrode 23.The pedestal 21 opens up fluted 24.Institute
State the bottom that solar chip 4 is fixed on the groove 24.The light-collecting lens 1 are partly or entirely housed in the groove 24
And be covered on the solar chip 4.The upper surface 11 of the light-collecting lens 1 towards exterior space, the light-collecting lens 1
Lower surface 12 is towards the solar chip 4.In the present embodiment, the following table of the positive electrode 22 and the solar chip 4
Face 12 is electrically connected, and one side of the pedestal 21 is extended to along the groove 24, the negative electrode 23 and the solar chip 4
Upper surface 11 electrically connect, and the another side of the pedestal 21 is extended to along the groove 24.
It should be appreciated that the positive electrode 22 and the negative electrode 23 be not limited to respectively with the solar chip
4 upper surface 11 electrically connects with lower surface 12, as long as the electric electric connection mode that the conduction solar chip 4 is produced can be realized
.
Preferably, the pedestal 21 is made up of the ceramic material such as aluminium nitride, barium monoxide or carborundum etc. of high thermal conductivity coefficient.
The solar chip 4 is fixed on the bottom of the groove 24 using elargol.The solar chip 4 is by chemical combination material
Material is made, and the combination materials are the corresponding material of iii-v element in the periodic table of elements.Certainly, solar chip 4 can also
It is made up of other materials familiar to the person skilled in the art.
The positive electrode 22 and negative electrode 23 are made up of the conductive silver glue of high heat conduction.
Further, the light collection modular converter includes a retaining element 3.The retaining element 3 fixes condenser
Piece 1, to limit movement of the horizontal direction of the light-collecting lens 1 relative to pedestal 21.The material of the retaining element 3 is made pottery by high temperature
Porcelain such as aluminum oxide or zirconium oxide are made.Thermal expansion system of the thermal coefficient of expansion of the retaining element 3 less than the light-collecting lens 1
Number, is beneficial to the light collection modular converter and fixing light-collecting lens 1 is still ensured that when operating temperature is raised.
Retaining element 3 is covered on positive electrode 22 and negative electrode 23, and thus retaining element 3 can also protect light collection modulus of conversion
Block 10, avoids positive electrode 22 completely exposed with negative electrode 23.
Further, in order to avoid the light through light-collecting lens 1 is out gathered in afterwards from the lower surface 12 of light-collecting lens 1
A little or an a small range and cause the situation that local temperature overheats, the lower surface 12 of the light-collecting lens 1 relative to it is described too
The part of positive energy chip 4 is provided with multiple optical scattering structures, such as groove of the V-arrangement in the present embodiment or projection 15.Thus, can make
The light for crossing light-collecting lens 1 out scatters afterwards from the groove or projection 15, and relatively evenly directive solar chip 4.Can be with
Understand, the lower surface 12 of the light-collecting lens 1 can also be set to the recessed of U-shaped relative to the part of the solar chip 4
Groove or projection, or diffusion particle is being partially filled near lower surface, as long as the mode of diffusing light can be realized.Together
When, the groove or projection 15 can also various arrangement mode arrangements, such as arrangement or concentric circles arrangement or oblique arrangement in length and breadth.
In the present embodiment, the groove 24 for carrying module 2 is internally provided with the load bearing seat 25 of support light-collecting lens 1, institute
Stating load bearing seat 25 has the face for being coated with reflectance coating being engaged with the convex surface of the lower surface 12 of the light-collecting lens 1.Thus, a side
Face, load bearing seat 25 can carry light-collecting lens 1；On the other hand, the reflecting surface of load bearing seat 25 can be reflected into the light of light-collecting lens 1
Line, increases the utilization rate of light to a certain extent, and can as far as possible reduce the position beyond sunshine directive solar chip 4, avoids
The temperature of corresponding site is caused to raise.
Of course, it is understood that can also be not provided with load bearing seat 25 inside groove 24, now the part of light-collecting lens 1 is received
Hold and frame is on groove 24.Meanwhile, can be anti-relative to the part plating beyond solar chip 4 in the lower surface 12 of light-collecting lens 1
Penetrate film.
Preferably, the load bearing seat 25 is made up of ceramic material such as aluminum oxide.
Due to light-collecting lens 1 and solar chip 4 by after the irradiation of sunshine it may happen that thermal expansion, therefore, enter
One step ground, in order to avoid light-collecting lens 1 and solar chip 4 each because thermal expansion and caused by mutual conflict, and then influence
Whole light collection modular converter, has the air gap, so that condenser between the light-collecting lens 1 and the solar chip 4
Piece 1 is mutually not in contact with each other with solar chip 4.When groove 24 is internally provided with load bearing seat 25, load bearing seat 25 carries light-collecting lens 1
And the air gap not can be set for contact solar chip 4 to make the lower surface 12 of light-collecting lens 1.And work as and do not set inside groove 24
When putting load bearing seat 25, then can be by the way that by the partial receipt of light-collecting lens 1, simultaneously frame is on groove 24 and it is protected with solar energy eyeglass 14
Certain distance is held, or solar chip 4 is not contacted the lower surface of light-collecting lens 1 by controlling the thickness of solar chip 4
12 i.e. settable the air gaps.
Further, the bottom of the groove 24 and the position corresponding with solar chip 4 offer some radiatings and lead
Hole 26.The radiating guide hole 26 leads to solar chip 4.Thus, it is arranged at the part heat of the solar chip 4 of the bottom of pedestal 21
Amount can be transferred to heat abstractor (not shown) by the radiating guide hole 26, to reduce the operating temperature of light collection modular converter.
It should be appreciated that Heat Conduction Material such as heat conduction elargol can be housed in the radiating guide hole 26, to increase radiating guide hole
26 radiating effect.
In the present embodiment, the groove 24 is rectangular channel, certainly, is also designed to U-lag, V-shaped groove or deep-slotted chip breaker.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention rather than its limitations, to the greatest extent
Pipe has been described in detail with reference to above-described embodiment to the present invention, and those of ordinary skill in the art should be understood：Still
Specific embodiment of the invention can be modified or equivalent, and without departing from any of spirit and scope of the invention
Modification or equivalent, it all should cover in the middle of scope of the presently claimed invention.
Claims (4)
1. a kind of solar cell, it includes light collection modular converter and boost module, it is characterised in that：
The light collection modular converter includes：
Solar chip, light-collecting lens and the carrying module of the light-collecting lens is carried, the light-collecting lens have relative upper
Surface and lower surface, it is characterised in that, the carrying module has pedestal, and the pedestal opens up fluted, the solar energy core
Piece is fixed on the bottom of the groove, and the bottom of the groove position corresponding with the solar chip offers some dissipating
Thermal conductivity hole, the radiating guide hole leads to the solar chip, and the light-collecting lens are contained in the groove, and the optically focused
Eyeglass is fixed on the pedestal, the lower surface of the light-collecting lens towards the solar chip, under the light-collecting lens
Surface is provided with multiple optical scattering structures relative to the part of the solar chip；
There is the air gap between the multiple optical scattering structure and the solar chip；
The light collection modular converter further includes retaining element, and be fixed on for the light-collecting lens described by the retaining element
On pedestal；
Thermal coefficient of expansion of the thermal coefficient of expansion of the retaining element less than the light-collecting lens；
The carrying module further has load bearing seat, and the load bearing seat is housed in the groove around the solar chip
Set, and the load bearing seat carries the light-collecting lens being contained in the groove；
The loading end that the load bearing seat carries the light-collecting lens is coated with reflectance coating；
The light-collecting lens have the side of the connection upper surface and the lower surface, and the side is coated with reflectance coating；
The boost module is made up of a kind of booster circuit for reducing voltage switch stress；
The booster circuit for reducing voltage switch stress includes the voltage Vin being input into by light collection modular converter, switch element
S1, S2, diode D1, D2, inductance L, input capacitance C1, intermediate capacitance C2 and output capacitance Co, light collection modular converter are produced
Input voltage vin, switch element S1, S2 have parasitic capacitance CS1, CS2 respectively, and switch element S1, S2 constitute switch element branch
Road, diode D1, D2 constitute diode branch, one end of the positive pole connection inductance L of input voltage vin and input capacitance C1's
Negative terminal, colelctor electrode, the positive level of diode D1 of the other end connecting valve element S1 of inductance L, the emitter stage connection of switch element 1
The colelctor electrode of switch element S2, the emitter stage of switch element S2 connects the negative pole of input voltage vin, the one of the intermediate capacitance C2
End connects the negative electrode of diode D1, the emitter stage of other end connecting valve element S1, the anode connection diode D1 of diode D2
Negative electrode, the anode of the negative electrode connection input capacitance C1 of diode D2, the negative electrode of one end connection diode D2 of output capacitance Co,
The other end of output capacitance Co connects the negative pole of input voltage vin, and produces output voltage Vout at its two ends, switching branches and
Diode branch is not simultaneously turned in synchronization.
2. solar cell according to claim 1, it is characterised in that：Described switch element S1, S2 be IGBT or
MOSFET or other high-power switch devices.
3. solar cell according to claim 1, it is characterised in that：Described diode D1, D2 recovers two poles for fast
Pipe or Schottky diode.
4. solar cell according to claim 1, it is characterised in that：By the conducting of controlling switch element S1, S2 and
Shut-off, realizes making while boost function the voltage drop between switch element S1, S2 collector and emitter no more than output electricity
The 50% of pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510284577.4A CN104821781B (en) | 2014-12-12 | 2015-05-27 | A kind of solar cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2014108579629 | 2014-12-12 | ||
| CN201410857962 | 2014-12-12 | ||
| CN201510284577.4A CN104821781B (en) | 2014-12-12 | 2015-05-27 | A kind of solar cell |
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| CN104821781A CN104821781A (en) | 2015-08-05 |
| CN104821781B true CN104821781B (en) | 2017-06-16 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346672A (en) * | 2013-06-17 | 2013-10-09 | 重庆大学 | Multi-stage single switch boost converter |
| CN103384115A (en) * | 2013-07-15 | 2013-11-06 | 深圳桑达国际电源科技有限公司 | Charging and discharging type direct current (DC)-DC conversion circuit and new energy power generation system |
| CN203423631U (en) * | 2013-04-19 | 2014-02-05 | 无锡联动太阳能科技有限公司 | Solar energy no-bridge inverter comprising high boosted circuit |
-
2015
- 2015-05-27 CN CN201510284577.4A patent/CN104821781B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203423631U (en) * | 2013-04-19 | 2014-02-05 | 无锡联动太阳能科技有限公司 | Solar energy no-bridge inverter comprising high boosted circuit |
| CN103346672A (en) * | 2013-06-17 | 2013-10-09 | 重庆大学 | Multi-stage single switch boost converter |
| CN103384115A (en) * | 2013-07-15 | 2013-11-06 | 深圳桑达国际电源科技有限公司 | Charging and discharging type direct current (DC)-DC conversion circuit and new energy power generation system |
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| CN104821781A (en) | 2015-08-05 |
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