FR3015810A1 - PHOTOVOLTAIC ENERGY SOURCE COMPRISING A BATTERY, PREVENT PREMATURE AGING OF THE BATTERY, LIGHTING HEAD THEREFOR - Google Patents

PHOTOVOLTAIC ENERGY SOURCE COMPRISING A BATTERY, PREVENT PREMATURE AGING OF THE BATTERY, LIGHTING HEAD THEREFOR Download PDF

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FR3015810A1
FR3015810A1 FR1363552A FR1363552A FR3015810A1 FR 3015810 A1 FR3015810 A1 FR 3015810A1 FR 1363552 A FR1363552 A FR 1363552A FR 1363552 A FR1363552 A FR 1363552A FR 3015810 A1 FR3015810 A1 FR 3015810A1
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Prior art keywords
battery
photovoltaic panel
box
heat shield
energy source
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Granted
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FR1363552A
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French (fr)
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FR3015810B1 (en
Inventor
Morgane Benard
Raphael Baillot
Thomas Samuel
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Sunna Design SA
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Sunna Design SA
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S9/00—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply
    • F21S9/02—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply the power supply being a battery or accumulator
    • F21S9/03—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply the power supply being a battery or accumulator rechargeable by exposure to light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/15—Thermal insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/46—Accumulators structurally combined with charging apparatus
    • H01M10/465—Accumulators structurally combined with charging apparatus with solar battery as charging system
    • 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
    • H02S40/30—Electrical components
    • H02S40/38—Energy storage means, e.g. batteries, structurally associated with PV modules
    • 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
    • H02S40/40—Thermal components
    • H02S40/42—Cooling means
    • H02S40/425—Cooling means using a gaseous or a liquid coolant, e.g. air flow ventilation, water circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • 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
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Photovoltaic Devices (AREA)

Abstract

L'invention concerne une source d'énergie formée par un caisson supportant à sa face supérieure un panneau photovoltaïque et une batterie logée dans ledit caisson et séparée dudit panneau photovoltaïque par une lame d'air s'écoulant entre des évents formés sur au moins deux surfaces opposées dudit caisson. Selon l'invention, la source comprend en outre un écran thermique (20) disposé entre ledit panneau photovoltaïque, et ladite batterie, avec un espacement entre ledit écran thermique (20) et ledit panneau photovoltaïque (2) pour assurer la circulation de ladite lame d'air. L'invention concerne également une tête d'éclairage comprenant une telle source. L'invention trouve application dans le domaine des sources d'énergie photovoltaïque.The invention relates to a power source formed by a box supporting on its upper face a photovoltaic panel and a battery housed in said box and separated from said photovoltaic panel by a blade of air flowing between vents formed on at least two opposed surfaces of said box. According to the invention, the source further comprises a heat shield (20) disposed between said photovoltaic panel, and said battery, with a spacing between said heat shield (20) and said photovoltaic panel (2) to ensure the circulation of said blade air. The invention also relates to a lighting head comprising such a source. The invention finds application in the field of photovoltaic energy sources.

Description

- 1 - SOURCE D'ENERGIE PHOTOVOLTAÏQUE COMPRENANT UNE BATTERIE, EVITANT LE VIEILLISSEMENT PREMATURE DE LA BATTERIE, TETE D'ECLAIRAGE ASSOCIEE Domaine de l'invention La présente invention concerne le domaine des sources d'énergie comprenant une batterie et un panneau photovoltaïque. Pour éviter l'échauffement excessif de la batterie entraînant son vieillissement prématuré, la batterie est séparée du panneau photovoltaïque par un espace creux, permettant l'écoulement de l'air et l'évacuation d'une partie au moins de la chaleur émise par le panneau photovoltaïque. Etat de la technique On connaît dans l'état de la technique le brevet française FR2936111 décrivant un système photovoltaïque comportant au moins un panneau photovoltaïque, une batterie reliée mécaniquement au panneau photovoltaïque par une structure de maintien, un espace ouvert sur l'environnement extérieur au système photovoltaïque et séparant la batterie et le panneau photovoltaïque d'une distance au moins égale à environ 1 cm.FIELD OF THE INVENTION The present invention relates to the field of energy sources comprising a battery and a photovoltaic panel. BACKGROUND OF THE INVENTION To avoid excessive heating of the battery causing its premature aging, the battery is separated from the photovoltaic panel by a hollow space, allowing the flow of air and the evacuation of at least a portion of the heat emitted by the solar panel. State of the art It is known in the prior art French patent FR2936111 describing a photovoltaic system comprising at least one photovoltaic panel, a battery mechanically connected to the photovoltaic panel by a holding structure, a space open to the outside environment at photovoltaic system and separating the battery and the photovoltaic panel by a distance of at least about 1 cm.

On connaît aussi le brevet DE19910001417 décrivant une station de charge solaire pour un accumulateur d'énergie. La batterie à charger est fixée au moyen d'un adaptateur directement au dos du générateur solaire. Ce document de l'art antérieur concerne en particulier une station de charge solaire de batteries d'accumulateur. La demande de brevet US2010302764 décrit une structure d'éclairage comprenant une source d'énergie solaire, un support de lampe, un panneau photovoltaïque, une unité d'éclairage, et un module de puissance. Le module d'alimentation stocke l'énergie générée par le panneau photovoltaïque et fournit l'énergie stockée à l'unité d'éclairage. Un passage d'air est formé entre un premier corps et un second corps de support de lampe pour permettre la circulation de l'air. Ainsi, la chaleur générée par le panneau photovoltaïque et l'unité d'éclairage en fonctionnement peut être dissipée par l'air circulant à travers le passage de l'air. Inconvénients de l'art antérieur - 2 - Les solutions de l'art antérieur prévoyant l'évacuation thermique par une lame d'air sont insuffisantes pour maintenir la batterie dans des conditions préservant son échauffement, dans le cas de systèmes compacts.Patent DE19910001417 describing a solar charging station for an energy accumulator is also known. The battery to be charged is fixed by means of an adapter directly to the back of the solar generator. This document of the prior art relates in particular to a solar charging station of storage batteries. The patent application US2010302764 describes a lighting structure comprising a solar energy source, a lamp holder, a photovoltaic panel, a lighting unit, and a power module. The power module stores the energy generated by the photovoltaic panel and supplies the stored energy to the lighting unit. An air passage is formed between a first body and a second lamp support body to allow air circulation. Thus, the heat generated by the photovoltaic panel and the lighting unit in operation can be dissipated by the air flowing through the passage of the air. Disadvantages of the prior art The solutions of the prior art providing for the thermal evacuation by an air gap are insufficient to maintain the battery under conditions which preserve its heating, in the case of compact systems.

Lorsque les éléments sont très rapprochés, la couche d'air n'assure pas une isolation satisfaisante, compte tenu de la température élevée que peut atteindre le panneau photovoltaïque, de l'ordre de 80°C. De plus, les éléments de l'art antérieur sont enfermés dans un boîtier, pouvant présenter des évents, mais formant néanmoins un espace qui n'est pas propice à la circulation de l'air et ne permettant pas d'éviter le risque d'échauffement préjudiciable de la batterie et préserver sa durée de vie. Solution apportée par l'invention La présente invention vise à répondre aux inconvénients de l'art antérieur en améliorant les performances thermiques afin d'améliorer la durée de vie de la batterie, en particulier pour des équipements dont le taux de remplissage est supérieur à 50%, c'est-à-dire que le volume cumulé des composants logés dans le caisson représente plus de 50% du volume intérieur dudit caisson.When the elements are very close together, the air layer does not provide satisfactory insulation, given the high temperature that can reach the photovoltaic panel, of the order of 80 ° C. In addition, the elements of the prior art are enclosed in a housing, may have vents, but nevertheless forming a space that is not conducive to the flow of air and does not avoid the risk of detrimental heating of the battery and preserve its life. Solution Provided by the Invention The present invention aims to meet the drawbacks of the prior art by improving thermal performance in order to improve battery life, in particular for equipment whose filling rate is greater than 50. %, that is to say that the cumulative volume of the components housed in the box represents more than 50% of the internal volume of said box.

A cet effet, l'invention concerne selon son acception la plus générale une source d'énergie formée par un caisson supportant à sa face supérieure un panneau photovoltaïque et une batterie logée dans ledit caisson et séparée dudit panneau photovoltaïque par une lame d'air s'écoulant entre des évents formés sur au moins deux surfaces opposées dudit caisson, caractérisée en ce qu'il comprend en outre un écran thermique disposé entre ledit panneau photovoltaïque, et ladite batterie, avec un espacement entre ledit écran thermique et ledit panneau photovoltaïque pour assurer la circulation de ladite lame d'air. Selon une première variante, ledit écran thermique est constitué par un matériau réfléchissant.For this purpose, the invention relates, in its most general sense, to an energy source formed by a box supporting on its upper face a photovoltaic panel and a battery housed in said box and separated from said photovoltaic panel by an air gap. flowing between vents formed on at least two opposite surfaces of said box, characterized in that it further comprises a heat shield disposed between said photovoltaic panel, and said battery, with a spacing between said heat shield and said photovoltaic panel to ensure the circulation of said air space. According to a first variant, said heat shield is constituted by a reflective material.

Selon une deuxième variante, ledit écran thermique comprend en outre un matériau isolant thermiquement. Selon une troisième variante, ledit écran thermique réfléchissant est un matériau multicouche. - 3 - Avantageusement, lesdits évents présentent un bord supérieur s'étendant sensiblement dans le plan passant par la surface inférieure dudit panneau photovoltaïque. L'invention concerne également une tête d'éclairage comprenant une source d'énergie formée par un caisson supportant à sa face supérieure un panneau photovoltaïque et une batterie logée dans ledit caisson et séparée dudit panneau photovoltaïque par une lame d'air s'écoulant entre des évents formés sur au moins deux surfaces opposées dudit caisson, caractérisée en ce qu'il comprend en outre un écran thermique réfléchissant disposé entre ledit panneau photovoltaïque, et ladite batterie, avec un espacement entre ledit élément réfléchissant et ledit panneau photovoltaïque pour assurer la circulation de ladite lame d'air, et en ce que ledit caisson comporte en outre un module LED alimenté par ladite batterie. Description détaillée d'un exemple non limitatif de réalisation La présente invention sera mieux comprise à la lecture de la description qui suit, se référant à des exemples non limitatifs de réalisation illustrés par les dessins annexés où : - la figure 1 représente une vue en coupe d'un exemple de réalisation de l'invention, sous la forme d'une tête d'éclairage - La figure 2 représente un autre exemple de réalisation d'une source d'énergie électrique conforme à l'invention. La tête d'éclairage représentée en figure 1 comporte un caisson (1) supportant à sa surface supérieure un panneau photovoltaïque (2). La partie inférieure du caisson (1) présente un logement (5) dans lequel est logé une batterie (3). Le caisson (1) supporte, à sa partie inférieur, et à l'opposé du logement (5), un module LED (4). Le logement (5) présente à sa surface inférieure des ouvertures pour l'évacuation des eaux de pluie et éviter un confinement thermique de la batterie (3). Un circuit électronique (6) comporte un calculateur commandant le pilotage de l'énergie des éléments du système, et notamment de la batterie et la charge constituée par 30 le module LED (4). Le caisson (1) est moulé en métal, par exemple de l'aluminium, ou en plastique. Il présente à sa partie avant (8), en coupe transversale, une section avant sensiblement rectangulaire et constante jusqu'à la partie arrière contenant la batterie. La partie arrière (9) présente une protubérance correspondant au logement de la batterie (3). - 4 - Un espace creux s'étend depuis la face avant (11) jusqu'à la face arrière (12) du caisson (1). La face avant (11) présente un évent transversal (13) dont la lèvre supérieure (14) s'étend jusqu'à la face inférieure (15) du panneau photovoltaïque (2). La face arrière (12) présente un évent transversal (16) dont la lèvre supérieure (17) s'étend jusqu'à la face inférieure (15) du panneau photovoltaïque (2). Les faces latérales peuvent optionnellement également présenter des évents, dont les lèvres supérieures s'étendent également jusqu'à la face inférieure (15) du panneau photovoltaïque (2). Les parois latérales assurent la canalisation de l'air pour créer un effet « cheminée » assurant un flux d'air avec une évacuation par les évents arrière. Un élément réfléchissant (20) est placé sur la batterie (3). Il est séparé de la face inférieure (15) du panneau photovoltaïque (2) par l'espace creux (10). Cet élément réfléchissant (20) est constitué par un film aluminisé, ou un complexe multicouche alternant des films aluminisé et des matériaux isolants thermiquement.According to a second variant, said heat shield further comprises a thermally insulating material. According to a third variant, said reflecting heat shield is a multilayer material. Advantageously, said vents have an upper edge extending substantially in the plane passing through the lower surface of said photovoltaic panel. The invention also relates to a lighting head comprising an energy source formed by a box supporting on its upper face a photovoltaic panel and a battery housed in said box and separated from said photovoltaic panel by a blade of air flowing between vents formed on at least two opposite surfaces of said box, characterized in that it further comprises a reflecting heat shield disposed between said photovoltaic panel, and said battery, with a spacing between said reflective element and said photovoltaic panel to ensure circulation said air space, and in that said box further comprises an LED module powered by said battery. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The present invention will be better understood on reading the following description, with reference to nonlimiting examples of embodiment illustrated by the appended drawings in which: FIG. 1 represents a sectional view of an exemplary embodiment of the invention, in the form of a lighting head - Figure 2 shows another embodiment of a source of electrical energy according to the invention. The lighting head shown in FIG. 1 comprises a box (1) supporting on its upper surface a photovoltaic panel (2). The lower part of the box (1) has a housing (5) in which is housed a battery (3). The box (1) supports, at its lower part, and opposite the housing (5), an LED module (4). The housing (5) has at its lower surface openings for the evacuation of rainwater and avoid thermal confinement of the battery (3). An electronic circuit (6) comprises a computer controlling the control of the energy of the elements of the system, and in particular of the battery and the load constituted by the LED module (4). The casing (1) is molded of metal, for example aluminum, or plastic. It has at its front portion (8), in cross section, a substantially rectangular front section and constant to the rear portion containing the battery. The rear portion (9) has a protuberance corresponding to the housing of the battery (3). - 4 - A hollow space extends from the front face (11) to the rear face (12) of the box (1). The front face (11) has a transverse vent (13) whose upper lip (14) extends to the underside (15) of the photovoltaic panel (2). The rear face (12) has a transverse vent (16) whose upper lip (17) extends to the underside (15) of the photovoltaic panel (2). The side faces may optionally also have vents, the upper lips also extend to the underside (15) of the photovoltaic panel (2). The side walls provide the ducting of the air to create a "chimney" effect ensuring a flow of air with an evacuation through the rear vents. A reflecting element (20) is placed on the battery (3). It is separated from the underside (15) of the photovoltaic panel (2) by the hollow space (10). This reflecting element (20) is constituted by an aluminized film, or a multilayer complex alternating aluminized films and thermally insulating materials.

A titre d'exemple, un tel élément est constitué par un matériau thermo- réflecteur multicouche formé de deux couches extérieures armées, de deux couches ouate polyester, N couches métallisées 18 microns et N+1 couches mousse polyéthylène d'une épaisseur de 0,8 mm. De préférence, la batterie (3) est isolée de la paroi latérale du caisson (1) pour limiter la conduction thermique. Le matériaux réfléchissant thermiquement (20) peut aussi être constitué par un matériau isolant bullé, revêtue sur ses surfaces par un revêtement réfléchissant thermiquement. La figure 2 représente un autre exemple de réalisation d'une source d'énergie électrique conforme à l'invention. Le panneau photovoltaïque (2) est monté sur un caisson (1) permettant l'adaptation d'un boîtier complémentaire (21) contenant la batterie (3). Cette batterie (3) est surmontée par un matériau réfléchissant thermiquement (20). Un espace creux (10) s'étant entre la surface inférieure (15) du panneau photovoltaïque (2) et la surface supérieure du matériau réfléchissant thermiquement (20). Le boîtier (1) présente des évents périphériques, sur certains côtés, pour permettre la circulation d'air dans l'espace creux (10). Ces évents s'étendent jusqu'à la surface inférieure du panneau photovoltaïque (2). - 5 - Le boîtier (21) présente à sa surface inférieure des ouvertures pour l'évacuation des eaux de pluie et éviter un confinement thermique de la batterie (3).By way of example, such an element is constituted by a multilayer thermo-reflective material formed of two reinforced outer layers, two layers of polyester wadding, N 18 micron metallized layers and N + 1 polyethylene foam layers with a thickness of 0, 8 mm. Preferably, the battery (3) is isolated from the side wall of the box (1) to limit thermal conduction. The thermally reflecting material (20) may also be a bubbled insulating material coated on its surfaces with a thermally reflective coating. FIG. 2 represents another embodiment of a source of electrical energy according to the invention. The photovoltaic panel (2) is mounted on a box (1) allowing the adaptation of a complementary housing (21) containing the battery (3). This battery (3) is surmounted by a thermally reflective material (20). A hollow space (10) extending between the lower surface (15) of the photovoltaic panel (2) and the upper surface of the heat reflecting material (20). The housing (1) has peripheral vents, on some sides, to allow air circulation in the hollow space (10). These vents extend to the lower surface of the photovoltaic panel (2). The housing (21) has at its lower surface openings for the evacuation of rainwater and to avoid thermal confinement of the battery (3).

Claims (5)

REVENDICATIONS1 - Source d'énergie formée par un caisson supportant à sa face supérieure un panneau photovoltaïque et une batterie logée dans ledit caisson et séparée dudit panneau photovoltaïque par une lame d'air s'écoulant entre des évents formés sur au moins deux surfaces opposées dudit caisson, caractérisée en ce qu'elle comprend en outre un écran thermique (20) disposé entre ledit panneau photovoltaïque, et ladite batterie, avec un espacement entre ledit écran thermique (20) et ledit panneau photovoltaïque (2) pour assurer la circulation de ladite lame d'air.CLAIMS1 - Energy source formed by a box supporting on its upper face a photovoltaic panel and a battery housed in said box and separated from said photovoltaic panel by a blade of air flowing between vents formed on at least two opposite surfaces of said box, characterized in that it further comprises a heat shield (20) disposed between said photovoltaic panel, and said battery, with a spacing between said heat shield (20) and said photovoltaic panel (2) to ensure the circulation of said air blade. 2 - Source d'énergie selon la revendication principale caractérisée en ce que ledit écran thermique est constitué par un matériau réfléchissant (20).2 - energy source according to the main claim characterized in that said heat shield is constituted by a reflective material (20). 3 - Source d'énergie selon la revendication 1 ou 2 caractérisée en ce que ledit écran thermique réfléchissant comprend en outre un matériau isolant thermiquement (20).3 - energy source according to claim 1 or 2 characterized in that said reflecting heat shield further comprises a thermally insulating material (20). 4 - Source d'énergie selon l'une au moins des revendications précédentes caractérisée en ce que lesdits évents présentent un bord supérieur s'étendant sensiblement dans le plan passant par la surface inférieure dudit panneau photovoltaïque (2).4 - Source of energy according to at least one of the preceding claims characterized in that said vents have an upper edge extending substantially in the plane passing through the lower surface of said photovoltaic panel (2). 5 - Tête d'éclairage comprenant une source d'énergie formée par un caisson supportant à sa face supérieure un panneau photovoltaïque et une batterie logée dans ledit caisson et séparée dudit panneau photovoltaïque par une lame d'air s'écoulant entre des évents formés sur au moins deux surfaces opposées dudit caisson, caractérisée en ce qu'il comprend en outre un écran thermique réfléchissant(20) disposé entre ledit panneau photovoltaïque (2), et ladite batterie (3), avec un espacement entre ledit élément réfléchissant et ledit panneau photovoltaïque pour assurer la circulation de ladite lame d'air, et en ce que ledit caisson comporte en outre un module LED (4) alimenté par ladite batterie.305 - lighting head comprising a power source formed by a box supporting on its upper face a photovoltaic panel and a battery housed in said box and separated from said photovoltaic panel by a blade of air flowing between vents formed on at least two opposite surfaces of said box, characterized in that it further comprises a reflecting heat shield (20) disposed between said photovoltaic panel (2), and said battery (3), with a spacing between said reflecting element and said panel photovoltaic to ensure the circulation of said air gap, and in that said box further comprises an LED module (4) powered by said battery.
FR1363552A 2013-12-24 2013-12-24 THERMAL MANAGEMENT SOLUTION LIMITING THE PREMATURE AGING OF A BATTERY POWERED BY A PHOTOVOLTAIC ENERGY SOURCE FOR AUTONOMOUS APPLICATION. Active FR3015810B1 (en)

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