WO2015083077A1 - A fixing element for a high-concentration photovoltaic module - Google Patents

A fixing element for a high-concentration photovoltaic module Download PDF

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Publication number
WO2015083077A1
WO2015083077A1 PCT/IB2014/066519 IB2014066519W WO2015083077A1 WO 2015083077 A1 WO2015083077 A1 WO 2015083077A1 IB 2014066519 W IB2014066519 W IB 2014066519W WO 2015083077 A1 WO2015083077 A1 WO 2015083077A1
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WO
WIPO (PCT)
Prior art keywords
plate
support base
seating
fixing element
receiving group
Prior art date
Application number
PCT/IB2014/066519
Other languages
French (fr)
Inventor
Gianluca Passerini
Original Assignee
Gpiii S.R.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gpiii S.R.L. filed Critical Gpiii S.R.L.
Publication of WO2015083077A1 publication Critical patent/WO2015083077A1/en

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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
    • H01L31/052—Cooling means directly associated or integrated with the PV cell, e.g. integrated Peltier elements for active cooling or heat sinks directly associated with the PV cells
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/79—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with spaced and opposed interacting reflective surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
    • 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
    • H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
    • H01L31/0547—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
    • 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
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y02E10/47—Mountings or tracking
    • 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

Definitions

  • the present invention relates to the technical sector concerning high- concentration photovoltaic modules (HCPV), able to convert solar energy into electrical energy.
  • HCPV high- concentration photovoltaic modules
  • a receiving group comprising a photovoltaic cell able to convert the solar energy into electrical energy and an electric circuit connected to the photovoltaic cell;
  • an optical system comprising a first reflective surface (called the “primary optical group”) and a second reflective surface (called the “secondary optical group”) fixed to the closing plate and opposite the first reflective surface;
  • - a metal base for supporting the receiving element and an optical element for conveying the solar rays towards the receiving group;
  • the receiving group and the optical conveyor are directly fixed to the metal support base.
  • a significant problem relates to the poor electrical insulation between the metal support base and the optical conveyor, as well as between the optical conveyor and the receiving group, with an inevitable production of various electrical micro-discharges.
  • a further drawback consists in the limited thermal conductivity between the receiving group and the metal support base, which forms the heat dispersion means.
  • a further drawback consists in the difficulty of centring the receiving group of the optical conveyor with respect to the metal support base.
  • the aim of the present invention is to obviate the above-described drawbacks by disclosing a fixing element for a photovoltaic module able to guarantee a high level of electrical insulation between the support base, the optical conveyor and the receiving group, preventing any electrical discharge phenomena.
  • a further aim of the present invention is to provide a fixing element for a photovoltaic module enabling retaining the receiving group at the metal support base, thus at the same time facilitating an optimal thermal conductivity between the receiving group and the metal support base.
  • a further aim of the present invention is to provide a fixing element for a photovoltaic module enabling a correct centring of the receiving group and the optical conveyor with respect to the metal support base.
  • the fixing element for the photovoltaic module comprises one or more of the following characteristics, considered alone or in combination:
  • the abutting means retaining the receiving group on the support base comprise third means enabling a correct orientation of the receiving group internally of the through-seating of the plate;
  • the plate further comprises fourth means, cooperating with the first centring and fixing means, enabling a correct orientation of the plate with respect to the support base;
  • the abutting means comprise an abutment which extends on at least a portion of the edge of the through-seating of the plate, towards the through- seating;
  • the third means comprise at least a projection which extends from the abutment towards the through-seating, enabling correct orientation of the receiving group internally of the through-seating of the plate;
  • the first centring and fixing means of the plate with respect to the support base comprise: at least a pair of through-holes realised in the plate; a pair of pins, which rise from the support base, positioned and conformed so as to insert in the through-holes realised in the plate; blocking means which removably engage with the pins so as to
  • the fourth means for orientating the plate with respect to the support base comprise: at least a first seating, or projection, realised in the plate; a corresponding second projection, or seating, realised in the support base, positioned and conformed so as to couple complementarily with the first seating, or projection, realized in the plate, so as to enable a correct orientation of the plate with respect to the support base.
  • FIG. 1 , 2 illustrate respective perspective views in an exploded and assembled configuration of a group of a high-concentration photovoltaic module provided with the fixing element of the invention
  • figure 2A illustrates, in larger scale, a lateral view of the group indicated in figure 2;
  • figure 2B illustrates, in larger scale, the detail indicated in figure 2A;
  • FIG. 3 illustrates, in larger scale, a plan view of the proposed fixing element
  • figure 3A illustrates, in larger scale, a section view according to line A-A indicated in figure 3;
  • - figure 4 illustrates, in larger scale, a plan view of the fixing element of the invention coupled with the metal support base and the receiving element;
  • - figure 5 illustrates a lateral view of a high-concentration photovoltaic module provided with the fixing element of the invention.
  • general reference numeral 1 relates to the fixing element for a photovoltaic module 500.
  • the photovoltaic module 500 comprise, in known ways:
  • a receiving body (4) positioned in the box body (2), comprising a photovoltaic cell (40), able to convert the solar energy into electrical energy, and an electric circuit connected to the photovoltaic cell (40);
  • an optical conveyor (7) positioned in the box body (2), for conveying the solar rays (F) towards the photovoltaic cell (40) of the receiving body (4);
  • a base (8) fixable to the bottom (20) of the box body (2), for supporting the receiving group (4) and the optical conveyor (7);
  • the optical system comprises, in particular, a first reflective surface (5) (primary optical group) fixable to the bottom (20) of the box body (2), and a second reflective surface (6) (secondary optical group) fixed to the transparent sheet (3) and opposite the first reflective surface (5).
  • the optical conveyor (7) comprises a base structure profiled in a trunco-pyramidal geometry with the smaller base thereof facing and in proximity of the photovoltaic cell (40), and the larger base facing the second reflective surface (6).
  • Each tab (70) comprises, in proximity of the respective end (71 ), a pair of opposite protuberances (72).
  • the fixing element (1 ) of the invention comprises: a plate (9), made of an electrically insulating element, which internally forms a through-seating (90) shaped so as to complementarity receive the receiving group (4); abutting means (10) provided on at least a portion of the edge (91 ) of the through-seating (90), able to retain the receiving group (4) on the support base (8) when the plate (9) is positioned resting on the support base (8); first means (1 1 ) enabling centring and fixing of the plate (9) with respect to the support base (8); the plate (9) further comprising second means (12) positioned and conformed such as to at least partly realise the ends (71 ) of corresponding support means (70) of the optical conveyor (7), so as to enable reciprocal coupling between the plate (9) and the optical conveyor (7), so that the optical conveyor
  • the abutting means (10) comprise an abutment (30) which extends on at least a portion of the edge (91 ) of the through-seating (90) of the plate (9), towards the through-seating (90).
  • the third means (100) comprise in turn at least a projection (101 ) which extends from the abutment (30) towards the through-seating (90), enabling correct orientation of the receiving group (4) internally of the through-seating (90) of the plate (9) (figures 3, 4, 3A).
  • the first means (1 1 ) for centring and fixing the plate (9) with respect to the support base (8) comprise: - at least a pair of through-holes (92) made in the plate (9);
  • the through-holes (92) realised in the plate (9) are positioned opposite with respect to the through-seating (90) for housing the receiving group (4), in order to facilitate the coupling with the pins (85) which emerge from the support base (8) (figure 3).
  • the plate (9) further comprises fourth means (14), cooperating with the first centring and fixing means (1 1 ), enabling correct orientation of the plate (9) with respect to the support base (8).
  • the fourth means (14) comprise at least a first seating (93), or projection, realised in the plate (9); a corresponding second projection (87), or seating, realised in the support base (8), positioned and conformed so as to couple complementarily with the first seating (93), or projection, realised in the plate (9), in such a way as to enable correct orientating of the plate (9) with respect to the support base (8) (figures 1 , 3, 4).
  • the second means (12) of the plate (9) comprise at least a housing (15) forming a variable-section channel (150) which enables inserting and retaining internally thereof ends (71 ) of the corresponding support means (70) of the optical conveyor (7).
  • the channel 150 conformed by the housing (15) comprises an inlet portion (151 ) and a terminal portion (152) having a larger section than the inlet portion ( 51 ), so as to enable forced transit of the end (71 ) of the support means (70) through the inlet portion (151 ) of the channel (150) and retaining thereof in the terminal portion (152) consequently to the abutting action exerted by the protuberances (72) of the support means (70) against the edges of the inlet portion (151 ) of the channel (150) (figures 2B, 3B, 3C).
  • the assembly of the group constituted by the support base (8), by the receiving body (4), by the plate (9) and by the optical conveyor (7) is schematised in figure 1.
  • First the receiving group (4) is fixed on the support base (8) by means of the plate (9), taking account: a) of the orientation of the receiving group (4) with respect to the through- seating (91 ) of the plate (9), imposed by the projection (101 ) which extends from the abutment (30); b) of the centring imposed by the pins (85) of the support base (8) which must engage with the through-holes (92) of the plate (9), with a following coupling of the pins (85) with the blocking means (1 10); c) of the orientation of the plate (9) with respect to the support base (8), imposed by the coupling of the first seating (93) realised by the plate (9) with the second projection (87) of the support base (8).
  • the receiving group (4) is retained against the support base (8) by action of the abutment (30) of the plate.
  • the plate (9) is made of an electrically-insulated material, preferably heat- conductive, so as to facilitate the heat conductivity of the plate and the support base (8).
  • a laminar bearing is interposed or a conductive gel between them, before fixing the plate (9) by means of the blocking means (1 10).
  • the optical conveyor (7) is positioned by engaging the ends (71 ) of the tabs (70) internally of the channels of the respective housings (15).
  • the abutting action of the protuberances (72) and the inlet portions (151 ) of the channels (150) enable stably retaining the ends (71) of the tabs (70) positioned in the housings (15).
  • the fixing element of the invention for a photovoltaic module is entirely able to guarantee a high electrical insulation between the metal support base, the optical conveyor and the receiving group, preventing any electrical discharge phenomenon.
  • the plate being made of an electrically-insulating material, enables an optimal electrical insulation between the metal support base and the optical conveyor, fixed to the plate.
  • the material the plate is made of exhibits a heat conductivity that is such as to facilitate the heat exchange between the plant and the support base, so as to enable a partial cooling of the plate.
  • the fixing element further enables retaining the receiving group to the metal support base, at the same time facilitating an optimal heat conductivity between the receiving group and the metal support base.
  • the retaining of the receiving group to the metal support base is in fact guaranteed by the plate of the fixing element, enabling use of heat-conductive gels between the receiving group and the metal base so as to maximise the heat conductivity.
  • the fixing element of the invention further enables a correct centring of the receiving group and the optical conveyor with respect to the metal support base, as more fully specified in the foregoing.

Abstract

The fixing element (1) of the invention is provided for a photovoltaic module (500) which comprises: a superiorly-open box body (2); a slab (3) of transparent material for closing the box body (2), enabling solar rays (F) to penetrate internally of the box body (2); a receiving body (4) comprising a photovoltaic cell (40), able to convert the solar energy into electrical energy; an optical system (5, 6) positioned in the box body (2), which receives the solar rays (F) that penetrate through the transparent slab (3) and directs them towards the photovoltaic cell (40); an optical conveyor (7) for conveying the solar rays (F) towards the photovoltaic cell (40) of the receiving body (4); a base (8) for supporting the receiving group (4) and the optical conveyor (7). The fixing element (1) comprises: a plate (9), made of an electrically insulating element, preferably heat-conductive, which internally forms a through-seating (90) shaped so as to complementarity receive the receiving group (4); abutting means (10) provided on at least a portion of the edge (91) of the through- seating (90), able to retain the receiving group (4) on the support base (8); first means (11) enabling centring and fixing of the plate (9) with respect to the support base (8); second means (12) positioned and conformed such as to at least partly realise the ends (71) of corresponding support means (70) of the optical conveyor (7), so as to enable reciprocal coupling between the plate (9) and the optical conveyor (7).

Description

A FIXING ELEMENT FOR A HIGH-CONCENTRATION PHOTOVOLTAIC MODULE
FIELD OF THE INVENTION
The present invention relates to the technical sector concerning high- concentration photovoltaic modules (HCPV), able to convert solar energy into electrical energy.
DESCRIPTION OF THE PRIOR ART
In the prior art a high-concentration photovoltaic module comprises:
- a superiorly-open box element;
- a closing slab made of a transparent material for enabling the solar rays to penetrate internally of the box body;
- a receiving group comprising a photovoltaic cell able to convert the solar energy into electrical energy and an electric circuit connected to the photovoltaic cell;
- an optical system comprising a first reflective surface (called the "primary optical group") and a second reflective surface (called the "secondary optical group") fixed to the closing plate and opposite the first reflective surface;
- a metal base for supporting the receiving element and an optical element for conveying the solar rays towards the receiving group;
- heat dispersion means conformed by the metal support base, for enabling the cooling of the receiving group.
In known ways to a technical expert in the sector, the receiving group and the optical conveyor are directly fixed to the metal support base.
A significant problem relates to the poor electrical insulation between the metal support base and the optical conveyor, as well as between the optical conveyor and the receiving group, with an inevitable production of various electrical micro-discharges.
A further drawback consists in the limited thermal conductivity between the receiving group and the metal support base, which forms the heat dispersion means.
A further drawback consists in the difficulty of centring the receiving group of the optical conveyor with respect to the metal support base.
SUMMARY OF THE INVENTION
The aim of the present invention is to obviate the above-described drawbacks by disclosing a fixing element for a photovoltaic module able to guarantee a high level of electrical insulation between the support base, the optical conveyor and the receiving group, preventing any electrical discharge phenomena.
A further aim of the present invention is to provide a fixing element for a photovoltaic module enabling retaining the receiving group at the metal support base, thus at the same time facilitating an optimal thermal conductivity between the receiving group and the metal support base.
A further aim of the present invention is to provide a fixing element for a photovoltaic module enabling a correct centring of the receiving group and the optical conveyor with respect to the metal support base.
The above-indicated aims are attained with a fixing element for a photovoltaic module realised according to claim 1.
In particular embodiments the fixing element for the photovoltaic module comprises one or more of the following characteristics, considered alone or in combination:
• the abutting means retaining the receiving group on the support base comprise third means enabling a correct orientation of the receiving group internally of the through-seating of the plate; the plate further comprises fourth means, cooperating with the first centring and fixing means, enabling a correct orientation of the plate with respect to the support base; the abutting means comprise an abutment which extends on at least a portion of the edge of the through-seating of the plate, towards the through- seating; the third means comprise at least a projection which extends from the abutment towards the through-seating, enabling correct orientation of the receiving group internally of the through-seating of the plate; the first centring and fixing means of the plate with respect to the support base comprise: at least a pair of through-holes realised in the plate; a pair of pins, which rise from the support base, positioned and conformed so as to insert in the through-holes realised in the plate; blocking means which removably engage with the pins so as to enable fixing the plate with respect to the support base; the through-holes realized in the plate are positioned oppositely with respect to the through-seating housing the receiving group, so as to facilitate the coupling with the pins that project from the support base; the second means of the plate comprise: at least a housing forming a variable-section channel enabling insertion and internal retaining of the corresponding support means of the optical conveyor; the support means of the optical conveyor comprise, in proximity of an end, at least a protuberance; with the channel conformed by the housing which comprises an inlet portion and a terminal portion having a larger section with respect to the inlet portion, so as to enable forced transit of the end of the support means through the inlet portion of the channel and the retaining thereof in the terminal portion consequently to the abutting action exerted by the protuberance of the support means against the edge of the inlet portion of the channel;
• the fourth means for orientating the plate with respect to the support base comprise: at least a first seating, or projection, realised in the plate; a corresponding second projection, or seating, realised in the support base, positioned and conformed so as to couple complementarily with the first seating, or projection, realized in the plate, so as to enable a correct orientation of the plate with respect to the support base.
BRIEF DESCRIPTION OF THE DRAWINGS
The characteristics of the invention will emerge in the following in which some preferred but not exclusive embodiments are described purely by way of example, with reference to the accompanying tables of drawings, in which:
- figures 1 , 2 illustrate respective perspective views in an exploded and assembled configuration of a group of a high-concentration photovoltaic module provided with the fixing element of the invention;
- figure 2A illustrates, in larger scale, a lateral view of the group indicated in figure 2;
- figure 2B illustrates, in larger scale, the detail indicated in figure 2A;
- figure 3 illustrates, in larger scale, a plan view of the proposed fixing element;
- figure 3A illustrates, in larger scale, a section view according to line A-A indicated in figure 3;
- figures 3B, 3C illustrate, in larger scale, respective views in section according to line B-B indicated in figure 3 in two particularly important configurations;
- figure 4 illustrates, in larger scale, a plan view of the fixing element of the invention coupled with the metal support base and the receiving element; - figure 5 illustrates a lateral view of a high-concentration photovoltaic module provided with the fixing element of the invention.
DESCRIPTION OF PREFERRED EMBODIMENTS
With reference to the above-cited tables of drawings, general reference numeral 1 relates to the fixing element for a photovoltaic module 500.
As mentioned in the introductory preamble and represented in figure 5, the photovoltaic module 500 comprise, in known ways:
- a superiorly-open box body (2);
- a slab (3) of transparent material for closing the box body (2), enabling solar rays (F) to penetrate internally of the box body (2);
- a receiving body (4), positioned in the box body (2), comprising a photovoltaic cell (40), able to convert the solar energy into electrical energy, and an electric circuit connected to the photovoltaic cell (40);
- an optical system (5, 6) positioned in the box body (2), which receives the solar rays (F) that penetrate through the transparent slab (3) and directs them towards the photovoltaic cell (40);
- an optical conveyor (7), positioned in the box body (2), for conveying the solar rays (F) towards the photovoltaic cell (40) of the receiving body (4);
- a base (8), fixable to the bottom (20) of the box body (2), for supporting the receiving group (4) and the optical conveyor (7);
- heat dispersing means (80) formed by the support base (8) for enabling cooling of the receiving group (4).
The optical system comprises, in particular, a first reflective surface (5) (primary optical group) fixable to the bottom (20) of the box body (2), and a second reflective surface (6) (secondary optical group) fixed to the transparent sheet (3) and opposite the first reflective surface (5). In particular the optical conveyor (7) comprises a base structure profiled in a trunco-pyramidal geometry with the smaller base thereof facing and in proximity of the photovoltaic cell (40), and the larger base facing the second reflective surface (6).
It further comprises support means which, by way of example, comp se four tabs (70) having a triangular geometry which emerge from the generatrices of the trunco-pyramidal structure.
Each tab (70) comprises, in proximity of the respective end (71 ), a pair of opposite protuberances (72).
In a novel way, the fixing element (1 ) of the invention comprises: a plate (9), made of an electrically insulating element, which internally forms a through-seating (90) shaped so as to complementarity receive the receiving group (4); abutting means (10) provided on at least a portion of the edge (91 ) of the through-seating (90), able to retain the receiving group (4) on the support base (8) when the plate (9) is positioned resting on the support base (8); first means (1 1 ) enabling centring and fixing of the plate (9) with respect to the support base (8); the plate (9) further comprising second means (12) positioned and conformed such as to at least partly realise the ends (71 ) of corresponding support means (70) of the optical conveyor (7), so as to enable reciprocal coupling between the plate (9) and the optical conveyor (7), so that the optical conveyor
(7) conveys a beam of solar rays (F) towards the photovoltaic cell (40) when the receiving group (4) and the plate (9) are arranged on the support base (8).
The abutting means (10) retaining the receiving group (4) on the support base
(8) comprise third means (100) enabling a correct orientation of the receiving group (4) internally of the through-seating (90) of the plate (9). The abutting means (10) comprise an abutment (30) which extends on at least a portion of the edge (91 ) of the through-seating (90) of the plate (9), towards the through-seating (90).
The third means (100) comprise in turn at least a projection (101 ) which extends from the abutment (30) towards the through-seating (90), enabling correct orientation of the receiving group (4) internally of the through-seating (90) of the plate (9) (figures 3, 4, 3A).
As illustrated in figure 1 , the first means (1 1 ) for centring and fixing the plate (9) with respect to the support base (8) comprise: - at least a pair of through-holes (92) made in the plate (9);
- a pair of pins (85) which emerge from the support base (8), positioned and conformed in such a way as to insert in the through-holes (92) realised in the plate (9);
- blocking means (1 10) which removably engage with the pins (85) so as to enable fixing the plate (9) with respect to the support base (8).
The through-holes (92) realised in the plate (9) are positioned opposite with respect to the through-seating (90) for housing the receiving group (4), in order to facilitate the coupling with the pins (85) which emerge from the support base (8) (figure 3). The plate (9) further comprises fourth means (14), cooperating with the first centring and fixing means (1 1 ), enabling correct orientation of the plate (9) with respect to the support base (8).
The fourth means (14) comprise at least a first seating (93), or projection, realised in the plate (9); a corresponding second projection (87), or seating, realised in the support base (8), positioned and conformed so as to couple complementarily with the first seating (93), or projection, realised in the plate (9), in such a way as to enable correct orientating of the plate (9) with respect to the support base (8) (figures 1 , 3, 4). The second means (12) of the plate (9) comprise at least a housing (15) forming a variable-section channel (150) which enables inserting and retaining internally thereof ends (71 ) of the corresponding support means (70) of the optical conveyor (7).
The channel 150 conformed by the housing (15) comprises an inlet portion (151 ) and a terminal portion (152) having a larger section than the inlet portion ( 51 ), so as to enable forced transit of the end (71 ) of the support means (70) through the inlet portion (151 ) of the channel (150) and retaining thereof in the terminal portion (152) consequently to the abutting action exerted by the protuberances (72) of the support means (70) against the edges of the inlet portion (151 ) of the channel (150) (figures 2B, 3B, 3C).
The assembly of the group constituted by the support base (8), by the receiving body (4), by the plate (9) and by the optical conveyor (7) is schematised in figure 1.
First the receiving group (4) is fixed on the support base (8) by means of the plate (9), taking account: a) of the orientation of the receiving group (4) with respect to the through- seating (91 ) of the plate (9), imposed by the projection (101 ) which extends from the abutment (30); b) of the centring imposed by the pins (85) of the support base (8) which must engage with the through-holes (92) of the plate (9), with a following coupling of the pins (85) with the blocking means (1 10); c) of the orientation of the plate (9) with respect to the support base (8), imposed by the coupling of the first seating (93) realised by the plate (9) with the second projection (87) of the support base (8).
The receiving group (4) is retained against the support base (8) by action of the abutment (30) of the plate.
The plate (9) is made of an electrically-insulated material, preferably heat- conductive, so as to facilitate the heat conductivity of the plate and the support base (8).
In order to maximise the heat conductivity between the receiving group (4) and the support base (8), a laminar bearing is interposed or a conductive gel between them, before fixing the plate (9) by means of the blocking means (1 10).
Following the fixing of the receiving group (4) on the support base (8), the optical conveyor (7) is positioned by engaging the ends (71 ) of the tabs (70) internally of the channels of the respective housings (15).
As mentioned in the foregoing, the abutting action of the protuberances (72) and the inlet portions (151 ) of the channels (150) enable stably retaining the ends (71) of the tabs (70) positioned in the housings (15).
From the above it can easily be understood how the fixing element of the invention for a photovoltaic module is entirely able to guarantee a high electrical insulation between the metal support base, the optical conveyor and the receiving group, preventing any electrical discharge phenomenon. The plate, being made of an electrically-insulating material, enables an optimal electrical insulation between the metal support base and the optical conveyor, fixed to the plate.
This enables minimising the distance between the photovoltaic cell of the receiving group and the optical conveyor (smaller base of the trunco-pyramidal structure), to the advantage of the conversion performance of the solar energy into electrical energy.
In a variant the material the plate is made of exhibits a heat conductivity that is such as to facilitate the heat exchange between the plant and the support base, so as to enable a partial cooling of the plate.
The fixing element further enables retaining the receiving group to the metal support base, at the same time facilitating an optimal heat conductivity between the receiving group and the metal support base. The retaining of the receiving group to the metal support base is in fact guaranteed by the plate of the fixing element, enabling use of heat-conductive gels between the receiving group and the metal base so as to maximise the heat conductivity.
By doing this the mechanical retaining action of the receiving group on the metal support base is delegated to the plate, while the heat transmission action of the heat is delegated to the selected heat-conductive gel (if present) interposed between the receiving group and the metal support base, together with the contact surface between the plate and the metal support base.
The fixing element of the invention further enables a correct centring of the receiving group and the optical conveyor with respect to the metal support base, as more fully specified in the foregoing.

Claims

CLAIMS ) A fixing element for a photovoltaic module, comprising :
- a superiorly-open box body (2);
- a slab (3) of transparent material for closing the box body (2), enabling solar rays (F) to penetrate internally of the box body (2);
- a receiving body (4), positioned in the box body (2), comprising a photovoltaic cell (40), able to convert the solar energy into electrical energy, and an electric circuit connected to the photovoltaic cell (40);
- an optical system (5, 6) positioned in the box body (2), which receives the solar rays (F) that penetrate through the transparent slab (3) and directs them towards the photovoltaic cell (40);
- an optical conveyor (7), positioned in the box body (2), for conveying the solar rays (F) towards the photovoltaic cell (40) of the receiving body (4);
- a base (8), fixable to the bottom (20) of the box body (2), for supporting the receiving group (4) and the optical conveyor (7);
- heat dispersing means (80) conformed by the support base (8) for enabling cooling of the receiving group (4); the fixing element (1 ) being characterised in that it comprises: a plate (9), made of an electrically insulating element, which internally forms a through-seating (90) shaped so as to complementarily receive the receiving group (4); abutting means (10) provided on at least a portion of the edge (91 ) of the through-seating (90), able to retain the receiving group (4) on the support base (8) when the plate (9) is positioned resting on the support base (8); first means (1 1 ) enabling centring and fixing of the plate (9) with respect to the support base (8); the plate (9) further comprising second means (12) positioned and conformed such as to at least partly realise the ends (71 ) of corresponding support means (70) of the optical conveyor (7), so as to enable reciprocal coupling between the plate (9) and the optical conveyor (7), so that the optical conveyor
(7) conveys a beam of solar rays (F) towards the photovoltaic cell (40) when the receiving group (4) and the plate (9) are arranged on the support base (8).
2) The fixing element of claim 1 , characterised in that the abutting means (10) retaining the receiving group (4) on the support base (8) comprise third means (100) enabling a correct orientation of the receiving group (4) internally of the through-seating (90) of the plate (9).
3) The fixing element of claim 1 or 2, characterised in that the plate (9) further comprises fourth means (14), cooperating with the first centring and fixing means (1 1 ), enabling correct orientation of the plate (9) with respect to the support base (8).
4) The fixing element of claims from 1 to 3, characterised in that the abutting means (10) comprise an abutment (30) which extends on at least a portion of the edge (91 ) of the through-seating (90) of the plate (9), towards the through- seating (90). 5) The fixing element of claims 2 and 4, characterised in that the third means (100) comprise at least a projection (101 ) which extends from the abutment (30) towards the through-seating (90), enabling correct orientation of the receiving group (4) internally of the through-seating (90) of the plate (9).
6) The fixing element of any one of claims from 1 to 5, characterised in that the first means (1 1 ) for centring and fixing the plate (9) with respect to the support base (8) comprise:
- at least a pair of through-holes (92) made in the plate (9);
- a pair of pins (85) which emerge from the support base (8), positioned and conformed in such a way as to insert in the through-holes (92) realised in the plate (9); blocking means (1 10) which removably engage with the pins (85) so as to enable fixing the plate (9) with respect to the support base (8). 7) The fixing element of claim 6, characterised in that the through-holes (92) realised in the plate (9) are positioned opposite with respect to the through- seating (90) for housing the receiving group (4), in order to facilitate the coupling with the pins (85) which emerge from the support base (8).
8) The fixing element of one of claims from 1 to 7, characterised in that the second means (12) of the plate (9) comprise at least a housing (15) forming a variable-section channel (150) which enables inserting and retaining internally thereof ends (71 ) of the corresponding support means (70) of the optical conveyor (7).
9) The fixing element of claim 8, characterised in that the support means (70) of the optical conveyor (7) comprise, in proximity of the end (71 ) at least a protuberance (72); the channel (150) being conformed by the housing (15) which comprises an inlet portion (151 ) and a terminal portion (152) having a larger section than the inlet portion (151 ), so as to enable forced transit of the end (71 ) of the support means (70) through the inlet portion (151 ) of the channel (150) and retaining thereof in the terminal portion (152) consequently to the abutting action exerted by the protuberance (72) of the support means (70) against the edges of the inlet portion (151 ) of the channel (150).
10) The fixing element of one of claims from 3 to 9, characterised in that the fourth means (14) for orientating the plate (9) with respect to the support base (8) comprise: at least a first seating (93), or projection, realised in the plate (9); a corresponding second projection (87), or seating, realised in the support base (8), positioned and conformed so as to couple complementarily with the first seating (93), or projection, realised in the plate (9), in such a way as to enable correct orientating of the plate (9) with respect to the support base (8).
PCT/IB2014/066519 2013-12-03 2014-12-02 A fixing element for a high-concentration photovoltaic module WO2015083077A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000675A ITBO20130675A1 (en) 2013-12-03 2013-12-03 FIXING ELEMENT FOR HIGH CONCENTRATION PHOTOVOLTAIC MODULE
ITBO2013A000675 2013-12-03

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WO2015083077A1 true WO2015083077A1 (en) 2015-06-11

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WO (1) WO2015083077A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086485A (en) * 1976-05-26 1978-04-25 Massachusetts Institute Of Technology Solar-radiation collection apparatus with tracking circuitry
US20080276929A1 (en) * 2007-03-06 2008-11-13 Dave Gerwing Solar collector
US20100139768A1 (en) * 2008-12-10 2010-06-10 Solfocus, Inc. Heat spreading shield
WO2013156929A1 (en) * 2012-04-17 2013-10-24 Gpiii S.R.L. A high-concentration photovoltaic panel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086485A (en) * 1976-05-26 1978-04-25 Massachusetts Institute Of Technology Solar-radiation collection apparatus with tracking circuitry
US20080276929A1 (en) * 2007-03-06 2008-11-13 Dave Gerwing Solar collector
US20100139768A1 (en) * 2008-12-10 2010-06-10 Solfocus, Inc. Heat spreading shield
WO2013156929A1 (en) * 2012-04-17 2013-10-24 Gpiii S.R.L. A high-concentration photovoltaic panel

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