EP3934940A1 - Motor vehicle equipped with an impact protection device for underfloor elements - Google Patents

Motor vehicle equipped with an impact protection device for underfloor elements

Info

Publication number
EP3934940A1
EP3934940A1 EP20709275.0A EP20709275A EP3934940A1 EP 3934940 A1 EP3934940 A1 EP 3934940A1 EP 20709275 A EP20709275 A EP 20709275A EP 3934940 A1 EP3934940 A1 EP 3934940A1
Authority
EP
European Patent Office
Prior art keywords
cushion
battery
vehicle
vehicle according
silencer
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP20709275.0A
Other languages
German (de)
French (fr)
Inventor
Nicolas Tropee
Ludovic Meresse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PSA Automobiles SA
Original Assignee
PSA Automobiles SA
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 PSA Automobiles SA filed Critical PSA Automobiles SA
Publication of EP3934940A1 publication Critical patent/EP3934940A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
    • B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
    • B60K2001/0416—Arrangement in the rear part of the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
    • B60K2001/0438—Arrangement under the floor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B60R13/0869—Insulating elements, e.g. for sound insulation for protecting heat sensitive parts, e.g. electronic components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B60R13/0876—Insulating elements, e.g. for sound insulation for mounting around heat sources, e.g. exhaust pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2306/00—Other features of vehicle sub-units
    • B60Y2306/01—Reducing damages in case of crash, e.g. by improving battery protection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/20—Exhaust treating devices having provisions not otherwise provided for for heat or sound protection, e.g. using a shield or specially shaped outer surface of exhaust device
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the invention relates to a motor vehicle equipped with a device for protecting against impact from the elements under the floor.
  • the invention relates to a rear impact protection device for the traction battery mounted in front of the exhaust silencer under the floor of hybrid vehicles.
  • Motor vehicles are generally equipped with a silencer which is mounted in the exhaust line under the floor and at the rear of the vehicle.
  • this silencer On certain vehicles and, in particular on plug-in hybrid vehicles (PHEV type), this silencer is mounted behind the traction battery.
  • the silencer and the battery are separated by an intermediate heat shield protecting the battery from thermal radiation emanating from the silencer.
  • the silencer In the event of a collision, or more generally of an impact at the rear of the vehicle, the silencer is then deformed and / or suddenly moved forward.
  • the heat shield generally only consists of a sheet or a thin sheet, it cannot prevent the silencer from directly impacting the battery and damaging it severely by generating electrical risks (fire, explosion, etc. ).
  • the object of the present invention is to solve the technical problems posed by the prior art by proposing to furnish the thermal insulation screen with a damping element making it possible to preserve the integrity of the battery during an impact. at the rear of the vehicle.
  • a motor vehicle equipped with a device providing protection against impacts from a battery mounted under the floor of said vehicle and separated from an exhaust silencer by an intermediate heat shield, characterized in that said device comprises a pad fixed facing the battery on said heat shield, said pad being capable of deforming during movement of the silencer towards and in contact with the battery to absorb the kinetic energy resulting from an impact on said vehicle.
  • the cushion has a larger surface than the face of the battery located opposite. [0013] According to another characteristic, the cushion extends at least over the height of the projecting part towards the front of the exhaust silencer.
  • the cushion has an extra thickness of between 0.5 and 2.0 cm opposite the part projecting towards the front of the exhaust silencer. [0015] According to another variant, the cushion has a uniform thickness of between 0.5 and 2.0 cm.
  • the cushion extends over the entire height of the front face of the exhaust silencer.
  • the cushion is made of a deformable material, the density of which is between 0.1 and 0.65.
  • the cushion is fixed to the front face of the heat shield by gluing.
  • the cushion and the heat shield are made in one piece.
  • Another object of the invention is a hybrid vehicle equipped with a device having the characteristics mentioned above for the protection against shocks of the traction battery mounted in front of the silencer, said cushion being intended for absorb the kinetic energy resulting from an impact at the rear of said vehicle.
  • the invention thus consists in using the existing heat shield, in integrating a mechanical protection function into it and in positioning it in the most judicious place, that is to say between the battery and the silencer, which makes it possible not to add a step of mounting additional elements under the vehicle floor.
  • the protection device fitted to the vehicle of the invention is simple, reliable and economical because it makes it possible to preserve the integrity of the battery during an impact or a collision at the rear of the vehicle effectively. without it being necessary to provide additional heavy and complex structural means and without modifying the assembly process.
  • the cushion comes into contact with the battery over a large area in order to reduce local stresses. Then following the impact, the cushion absorbs the kinetic energy and diffuses it over a large surface, thus avoiding local deformation and the risk of tearing the battery casing.
  • FIG. IA is a partial side view of an embodiment of the floor of a vehicle according to the invention equipped with an impact protection device, before impact.
  • FIG. IB is a partial side view of an embodiment of the floor of a vehicle according to the invention equipped with an impact protection device, after impact. [0027] For greater clarity, identical or similar elements are identified by identical reference signs in all of the figures.
  • the invention relates to a motor vehicle equipped with a device for ensuring the protection of the elements mounted under the floor vis-à-vis an impact at the rear, for example, by collision with another vehicle or hitting an obstacle while backing up.
  • the improved protection device according to the invention aims to protect, in such circumstances, the traction battery 1 which is mounted in front of the exhaust silencer 2, in particular, under the vehicle floor hybrids.
  • the traction battery 1 is mounted under the floor and is generally separated from the silencer 2 of the exhaust line 6 by an intermediate heat shield 3, as illustrated in Figure IA.
  • This screen 3 is generally produced in the form of a metal strip or a thin sheet having insulating properties making it possible to preserve the battery 1 from the thermal radiation generated by the silencer 2.
  • the heat released by the silencer 2 would have the effect of raising the temperature of the electrolyte and of the electrical components to a level incompatible with proper operation of the battery 1 and even prejudicial to the safety of the vehicle.
  • the invention provides for providing the face 31 of the heat shield located opposite the battery 1 with a damping pad 4.
  • This cushion 4, fixed on the heat shield 3, is liable to deform during a displacement of the silencer 2 forwards in contact with the battery 1 to absorb the kinetic energy resulting from an impact at the rear of the vehicle. The integrity of battery 1 is thus preserved during the impact.
  • the cushion 4 has a larger surface than the face 12 of the battery (or that of its casing 13) located opposite.
  • the cushion 4 pushed by the silencer 2 first comes into contact with the battery 1 over its entire surface in order to reduce the local stresses, then immediately afterwards (depending on the force of the impact), the cushion absorbs the kinetic energy and diffuses it over a large surface while deforming, as illustrated in figure IB.
  • This deformation of the cushion 4 makes it possible to avoid local deformations and / or the risk of tearing of the casing 13 of the battery 1.
  • the cushion 4 extends at least over the height of the part 21 projecting towards the front of the exhaust silencer 2.
  • the cushion 4 extends over the entire height of the front face of the exhaust silencer 2 and has a thickness of between 0.5 and 2.0 cm. According to a first variant illustrated in FIG. 1A, this thickness is uniform over the entire height of the cushion 4.
  • the cushion 4 has an extra thickness of between 0.5 and 2.0 cm opposite the part 21 projecting towards the front of the exhaust silencer 2.
  • the cushion 4 is made of a deformable material (possibly elastically deformable), the density of which is between 0.1 and 0.65.
  • the invention provides that the cushion 4 is fixed to the front face 31 of the heat shield 3 by gluing.
  • other methods of attachment can be used without departing from the scope of the invention.
  • the cushion 4 and the heat shield 3 are made in one piece.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Acoustics & Sound (AREA)
  • Physics & Mathematics (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention concerns a motor vehicle comprising an impact protection device for a battery (1) mounted under the floor of said vehicle and separated from an exhaust silencer (2) by an intermediate heat shield (3), characterised in that said device comprises a cushion (4) fastened opposite the battery (1) on said heat shield (3), the cushion (4) being able to deform when the silencer (2) moves forwards contacting the battery (1), in order to absorb the kinetic energy resulting from an impact on the vehicle.

Description

DESCRIPTION DESCRIPTION
TITRE : VEHICULE AUTOMOBILE EQUIPE D'UN DISPOSITIF DE PROTECTION CONTRE LES CHOCS DES ELEMENTS SOUS PLANCHER TITLE: MOTOR VEHICLE EQUIPPED WITH A PROTECTION DEVICE AGAINST IMPACT FROM UNDERFLOOR ELEMENTS
[0001] L’invention concerne un véhicule automobile équipé d’un dispositif de protection contre les chocs des éléments sous plancher. [0001] The invention relates to a motor vehicle equipped with a device for protecting against impact from the elements under the floor.
[0002] En particulier, l’invention s’intéresse à un dispositif de protection contre les chocs arrière de la batterie de traction montée à l’avant du silencieux d’échappement sous le plancher des véhicules hybrides. [0002] In particular, the invention relates to a rear impact protection device for the traction battery mounted in front of the exhaust silencer under the floor of hybrid vehicles.
[0003] Les véhicules automobiles sont généralement équipés d’un silencieux qui est monté sur la ligne d’échappement sous le plancher et à l’arrière du véhicule. [0003] Motor vehicles are generally equipped with a silencer which is mounted in the exhaust line under the floor and at the rear of the vehicle.
[0004] Sur certains véhicules et, notamment sur les véhicules hybrides rechargeables (type PHEV), ce silencieux est monté derrière la batterie de traction. Le silencieux et la batterie sont séparés par un écran thermique intercalaire assurant la protection de la batterie du rayonnement thermique émanant du silencieux. [0005] En cas de collision, ou plus généralement de choc à l’arrière du véhicule, le silencieux se trouve alors déformé et/ou déplacé brutalement vers l’avant. L’écran thermique n’étant généralement constitué que d’une feuille ou d’une tôle mince, il ne peut éviter que le silencieux vienne alors directement impacter la batterie et l’endommager sévèrement en générant des risques électriques (incendie, explosion, ....) . [0004] On certain vehicles and, in particular on plug-in hybrid vehicles (PHEV type), this silencer is mounted behind the traction battery. The silencer and the battery are separated by an intermediate heat shield protecting the battery from thermal radiation emanating from the silencer. [0005] In the event of a collision, or more generally of an impact at the rear of the vehicle, the silencer is then deformed and / or suddenly moved forward. As the heat shield generally only consists of a sheet or a thin sheet, it cannot prevent the silencer from directly impacting the battery and damaging it severely by generating electrical risks (fire, explosion, etc. ...).
[0006] Or, l’option consistant à éviter le contact entre le silencieux et la batterie en éloignant le silencieux est impossible sur les véhicules à porte-à-faux court. [0006] However, the option of avoiding contact between the silencer and the battery by moving the silencer away is not possible on vehicles with a short overhang.
[0007] Une autre option pourrait consister à disposer un cadre de protection autour de la batterie mais cette solution alourdirait la batterie et serait excessivement coûteuse. [0008] Il existe déjà des dispositifs de protection contre les chocs des éléments embarqués sous le plancher des véhicules automobiles tels que celui décrit dans le FR3036359. Toutefois, ce dispositif qui assure également une protection thermique est uniquement destiné à protéger le réservoir du système de réduction catalytique sélective (SCR) lors d’un éventuel contact direct et vertical avec le sol et non pas d’un choc à l’arrière du véhicule orienté selon une direction longitudinale. [0007] Another option could consist in having a protective frame around the battery, but this solution would make the battery heavier and would be excessively expensive. [0008] There are already devices for protecting against impacts of elements embedded under the floor of motor vehicles such as that described in FR3036359. However, this device which also provides thermal protection is only intended to protect the tank of the selective catalytic reduction (SCR) system during any direct and vertical contact with the ground and not from an impact to the rear of the vehicle. vehicle oriented in a longitudinal direction.
[0009] Dans ce contexte, il s’est avéré nécessaire de prévoir de nouveaux moyens qui soient spécifiquement adaptés à assurer la protection mécanique des éléments sous plancher et, en particulier, de la batterie en cas de collision à l’arrière du véhicule tout en respectant des contraintes de compacité et de légèreté et des coûts de fabrication et de montage raisonnables. [0009] In this context, it has proven necessary to provide new means which are specifically adapted to ensure the mechanical protection of the elements under the floor and, in particular, of the battery in the event of a collision at the rear of the vehicle while while respecting the constraints of compactness and lightness and reasonable manufacturing and assembly costs.
[0010] La présente invention a pour but de résoudre les problèmes techniques posés par l’art antérieur en proposant de garnir l’écran d’isolation thermique d’un élément amortissant permettant de préserver l’intégrité de la batterie lors d’un choc à l’arrière du véhicule. The object of the present invention is to solve the technical problems posed by the prior art by proposing to furnish the thermal insulation screen with a damping element making it possible to preserve the integrity of the battery during an impact. at the rear of the vehicle.
[0011] Ce but est atteint, selon l’invention, au moyen d’un véhicule automobile équipé d’un dispositif assurant la protection contre les chocs d’une batterie montée sous le plancher dudit véhicule et séparée d’un silencieux d’échappement par un écran thermique intercalaire, caractérisé en ce que ledit dispositif comprend un coussin fixé en regard de la batterie sur ledit écran thermique, ledit coussin étant susceptible de se déformer lors d’un déplacement du silencieux vers et au contact de la batterie pour absorber l’énergie cinétique résultant d’un impact sur ledit véhicule. This object is achieved, according to the invention, by means of a motor vehicle equipped with a device providing protection against impacts from a battery mounted under the floor of said vehicle and separated from an exhaust silencer by an intermediate heat shield, characterized in that said device comprises a pad fixed facing the battery on said heat shield, said pad being capable of deforming during movement of the silencer towards and in contact with the battery to absorb the kinetic energy resulting from an impact on said vehicle.
[0012] Selon une caractéristique avantageuse de l’invention, le coussin présente une surface plus grande que la face de la batterie située en regard. [0013] Selon une autre caractéristique, le coussin s’étend au moins sur la hauteur de la partie en saillie vers l’avant du silencieux d’échappement. [0012] According to an advantageous characteristic of the invention, the cushion has a larger surface than the face of the battery located opposite. [0013] According to another characteristic, the cushion extends at least over the height of the projecting part towards the front of the exhaust silencer.
[0014] Selon une variante de réalisation, le coussin présente une surépaisseur comprise entre 0,5 et 2,0 cm en regard de la partie en saillie vers l’avant du silencieux d’échappement. [0015] Selon une autre variante, le coussin a une épaisseur uniforme comprise entre 0,5 et 2,0 cm. [0014] According to an alternative embodiment, the cushion has an extra thickness of between 0.5 and 2.0 cm opposite the part projecting towards the front of the exhaust silencer. [0015] According to another variant, the cushion has a uniform thickness of between 0.5 and 2.0 cm.
[0016] De préférence, le coussin s’étend sur toute la hauteur de la face avant du silencieux d’échappement. [0017] Selon encore une autre caractéristique, le coussin est réalisé avec un matériau déformable dont la densité est comprise entre 0,1 et 0,65. [0016] Preferably, the cushion extends over the entire height of the front face of the exhaust silencer. [0017] According to yet another characteristic, the cushion is made of a deformable material, the density of which is between 0.1 and 0.65.
[0018] Selon une autre variante, le coussin est fixé sur la face avant de l’écran thermique par collage. [0018] According to another variant, the cushion is fixed to the front face of the heat shield by gluing.
[0019] Selon encore une autre variante le coussin et l’écran thermique sont réalisés en une seule pièce. [0019] According to yet another variant, the cushion and the heat shield are made in one piece.
[0020] Un autre objet de l’invention est un véhicule hybride équipé d’un dispositif présentant les caractéristiques mentionnées ci-dessus pour la protection contre les chocs de la batterie de traction montée à l’avant du silencieux, ledit coussin étant destiné à absorber l’énergie cinétique résultant d’un impact à l’arrière dudit véhicule. [0021] L’invention consiste ainsi à utiliser l’écran thermique existant, à lui intégrer une fonction de protection mécanique et à le positionner à l’endroit le plus judicieux, c’est-à-dire entre la batterie et le silencieux, ce qui permet de ne pas ajouter d’étape de montage d’éléments supplémentaires sous le plancher du véhicule. Another object of the invention is a hybrid vehicle equipped with a device having the characteristics mentioned above for the protection against shocks of the traction battery mounted in front of the silencer, said cushion being intended for absorb the kinetic energy resulting from an impact at the rear of said vehicle. The invention thus consists in using the existing heat shield, in integrating a mechanical protection function into it and in positioning it in the most judicious place, that is to say between the battery and the silencer, which makes it possible not to add a step of mounting additional elements under the vehicle floor.
[0022] Le dispositif de protection équipant le véhicule de l’invention est simple, fiable et économique car il permet de préserver l’intégrité de la batterie lors d’un choc ou d’une collision à l'arrière du véhicule de façon efficace sans qu’il soit nécessaire de prévoir des moyens structurels complémentaires lourds et complexes et sans modifier le procédé de montage. The protection device fitted to the vehicle of the invention is simple, reliable and economical because it makes it possible to preserve the integrity of the battery during an impact or a collision at the rear of the vehicle effectively. without it being necessary to provide additional heavy and complex structural means and without modifying the assembly process.
[0023] Au moment du choc, le coussin vient en contact avec la batterie sur une large surface afin de réduire les contraintes locales. Puis la suite de l’impact, le coussin absorbe l’énergie cinétique et la diffuse sur une large surface évitant ainsi les déformations locales et les risques de déchirures du carter de la batterie. [0024] D’autres caractéristiques et avantages de l’invention ressortiront à la lecture de la description qui va suivre, en référence aux figures annexées et détaillées ci-après. At the time of impact, the cushion comes into contact with the battery over a large area in order to reduce local stresses. Then following the impact, the cushion absorbs the kinetic energy and diffuses it over a large surface, thus avoiding local deformation and the risk of tearing the battery casing. Other characteristics and advantages of the invention will become apparent on reading the description which follows, with reference to the appended and detailed figures below.
[0025] [Fig. IA] est une vue partielle de côté d’un mode de réalisation du plancher d’un véhicule selon l’invention équipé d’un dispositif de protection contre les chocs, avant impact. [0025] [Fig. IA] is a partial side view of an embodiment of the floor of a vehicle according to the invention equipped with an impact protection device, before impact.
[0026] [Fig. IB] est une vue partielle de côté d’un mode de réalisation du plancher d’un véhicule selon l’invention équipé d’un dispositif de protection contre les chocs, après impact. [0027] Pour plus de clarté, les éléments identiques ou similaires sont repérés par des signes de référence identiques sur l’ensemble des figures. [0026] [Fig. IB] is a partial side view of an embodiment of the floor of a vehicle according to the invention equipped with an impact protection device, after impact. [0027] For greater clarity, identical or similar elements are identified by identical reference signs in all of the figures.
[0028] Naturellement, les modes de mise en œuvre du procédé de l’invention illustrés par les figures présentées ci-dessus et décrites ci-après, ne sont donnés qu'à titre d’exemples non limitatifs. 11 est explicitement prévu que l'on puisse proposer et combiner entre eux différents modes pour en proposer d'autres. [0028] Of course, the embodiments of the method of the invention illustrated by the figures presented above and described below are given only by way of non-limiting examples. It is explicitly provided that one can propose and combine between them different modes to offer others.
[0029] L’invention concerne un véhicule automobile équipé d’un dispositif destiné à assurer la protection des éléments montés sous le plancher vis-à-vis d’un impact à l’arrière, par exemple, par collision avec un autre véhicule ou en heurtant un obstacle en reculant. [0030] En particulier, le dispositif de protection perfectionné selon l’invention vise à protéger, dans de telles circonstances, la batterie de traction 1 qui est montée à l’avant du silencieux d’échappement 2, notamment, sous le plancher des véhicules hybrides. The invention relates to a motor vehicle equipped with a device for ensuring the protection of the elements mounted under the floor vis-à-vis an impact at the rear, for example, by collision with another vehicle or hitting an obstacle while backing up. In particular, the improved protection device according to the invention aims to protect, in such circumstances, the traction battery 1 which is mounted in front of the exhaust silencer 2, in particular, under the vehicle floor hybrids.
[0031] De manière traditionnelle, dans les véhicules hybrides, la batterie de traction 1 est montée sous le plancher et est généralement séparée du silencieux 2 de la ligne d’échappement 6 par un écran thermique intercalaire 3, comme illustré par la figure IA. Cet écran 3 est généralement réalisé sous forme d’un feuillard métallique ou d’une tôle mince ayant des propriétés d’isolation permettant de préserver la batterie 1 du rayonnement thermique généré par le silencieux 2. Conventionally, in hybrid vehicles, the traction battery 1 is mounted under the floor and is generally separated from the silencer 2 of the exhaust line 6 by an intermediate heat shield 3, as illustrated in Figure IA. This screen 3 is generally produced in the form of a metal strip or a thin sheet having insulating properties making it possible to preserve the battery 1 from the thermal radiation generated by the silencer 2.
[0032] En effet, la chaleur dégagée par le silencieux 2 aurait pour effet d’élever la température de l’électrolyte et des composants électriques à un niveau incompatible avec un bon fonctionnement de la batterie 1 et même préjudiciable à la sécurité du véhicule. [0032] Indeed, the heat released by the silencer 2 would have the effect of raising the temperature of the electrolyte and of the electrical components to a level incompatible with proper operation of the battery 1 and even prejudicial to the safety of the vehicle.
[0033] Toutefois, en cas d’impact à l’arrière, l’énergie cinétique résultant du choc provoque la déformation et le déplacement vers l’avant du silencieux 2 en direction de la batterie 1 disposée de façon adjacente. [0034] Or, la résistance mécanique de l’écran thermique 3 n’est pas suffisante pour éviter que l’énergie cinétique ne vienne déformer la batterie 1, dont le carter 13 est également peu résistant, et n’entraîne alors des risques majeurs d’incidents électriques. [0033] However, in the event of an impact from the rear, the kinetic energy resulting from the impact causes the deformation and forward displacement of the muffler 2 towards the adjacent battery 1. However, the mechanical resistance of the heat shield 3 is not sufficient to prevent the kinetic energy from deforming the battery 1, the casing 13 of which is also not very resistant, and therefore does not entail major risks electrical incidents.
[0035] Afin d’éviter qu’un impact à l’arrière du véhicule n’ait de telles conséquences, l’invention prévoit de munir la face 31 de l’écran thermique située en regard de la batterie 1 d’un coussin amortisseur 4. In order to prevent an impact at the rear of the vehicle from having such consequences, the invention provides for providing the face 31 of the heat shield located opposite the battery 1 with a damping pad 4.
[0036] Ce coussin 4, fixé sur l’écran thermique 3, est susceptible de se déformer lors d’un déplacement du silencieux 2 vers l’avant au contact de la batterie 1 pour absorber l’énergie cinétique résultant d’un impact à l’arrière du véhicule. L’intégrité de la batterie 1 est ainsi préservée lors du choc. This cushion 4, fixed on the heat shield 3, is liable to deform during a displacement of the silencer 2 forwards in contact with the battery 1 to absorb the kinetic energy resulting from an impact at the rear of the vehicle. The integrity of battery 1 is thus preserved during the impact.
[0037] Le coussin 4 présente une surface plus grande que la face 12 de la batterie (ou celle de son carter 13) située en regard. The cushion 4 has a larger surface than the face 12 of the battery (or that of its casing 13) located opposite.
[0038] Ainsi, lors d’un choc à l’arrière du véhicule (dans le sens de la flèche figure IB), le coussin 4, poussé par le silencieux 2, vient d’abord en contact avec la batterie 1 sur toute sa surface afin de réduire les contraintes locales, puis immédiatement après (en fonction de la force de l’impact), le coussin absorbe l’énergie cinétique et la diffuse sur une large surface en se déformant, comme illustré par la figure IB. [0039] Cette déformation du coussin 4 permet d’éviter les déformations locales et/ou les risques de déchirure du carter 13 de la batterie 1. Thus, during an impact to the rear of the vehicle (in the direction of the arrow in Figure IB), the cushion 4, pushed by the silencer 2, first comes into contact with the battery 1 over its entire surface in order to reduce the local stresses, then immediately afterwards (depending on the force of the impact), the cushion absorbs the kinetic energy and diffuses it over a large surface while deforming, as illustrated in figure IB. This deformation of the cushion 4 makes it possible to avoid local deformations and / or the risk of tearing of the casing 13 of the battery 1.
[0040] Au montage, le coussin 4 s’étend au moins sur la hauteur de la partie 21 en saillie vers l’avant du silencieux d’échappement 2. [0041] De préférence, le coussin 4 s’étend sur toute la hauteur de la face avant du silencieux d’échappement 2 et a une épaisseur comprise entre 0,5 et 2,0 cm. Selon une première variante illustrée par la figure IA, cette épaisseur est uniforme sur toute la hauteur du coussin 4. During assembly, the cushion 4 extends at least over the height of the part 21 projecting towards the front of the exhaust silencer 2. [0041] Preferably, the cushion 4 extends over the entire height of the front face of the exhaust silencer 2 and has a thickness of between 0.5 and 2.0 cm. According to a first variant illustrated in FIG. 1A, this thickness is uniform over the entire height of the cushion 4.
[0042] Le cas échéant et selon une autre variante non représentée, le coussin 4 présente une surépaisseur comprise entre 0,5 et 2,0 cm en regard de la partie 21 en saillie vers l’avant du silencieux d’échappement 2. [0042] Where appropriate and according to another variant not shown, the cushion 4 has an extra thickness of between 0.5 and 2.0 cm opposite the part 21 projecting towards the front of the exhaust silencer 2.
[0043] Le coussin 4 est réalisé avec un matériau déformable (éventuellement déformable élastiquement) dont la densité est comprise entre 0,1 et 0,65. The cushion 4 is made of a deformable material (possibly elastically deformable), the density of which is between 0.1 and 0.65.
[0044] L’invention prévoit que le coussin 4 soit fixé sur la face avant 31 de l’écran thermique 3 par collage. Toutefois, d’autres modes de fixation (rivetage, clipsage, ...) peuvent être utilisés sans sortir du cadre de l’invention. [0044] The invention provides that the cushion 4 is fixed to the front face 31 of the heat shield 3 by gluing. However, other methods of attachment (riveting, clipping, etc.) can be used without departing from the scope of the invention.
[0045] Selon variante de réalisation non représentée, le coussin 4 et l’écran thermique 3 sont réalisés en une seule pièce. According to an alternative embodiment not shown, the cushion 4 and the heat shield 3 are made in one piece.

Claims

REVENDICATIONS
1. Véhicule automobile équipé d’un dispositif assurant la protection contre les chocs d’une batterie (1) montée sous le plancher dudit véhicule et séparée d’un silencieux d’échappement (2) par un écran thermique (3) intercalaire, caractérisé en ce que ledit dispositif comprend un coussin (4) fixé en regard de la batterie (1) sur ledit écran thermique (3), ledit coussin (4) étant susceptible de se déformer lors d’un déplacement du silencieux (2) vers et au contact de la batterie (1) pour absorber l’énergie cinétique résultant d’un impact sur ledit véhicule. 1. Motor vehicle equipped with a device ensuring the protection against impacts of a battery (1) mounted under the floor of said vehicle and separated from an exhaust silencer (2) by a heat shield (3) intermediate, characterized in that said device comprises a cushion (4) fixed facing the battery (1) on said heat shield (3), said cushion (4) being capable of deforming during movement of the silencer (2) towards and in contact with the battery (1) to absorb the kinetic energy resulting from an impact on said vehicle.
2. Véhicule selon la revendication 1, caractérisé en ce que le coussin (4) présente une surface plus grande que la face (12) de la batterie (1) située en regard. 2. Vehicle according to claim 1, characterized in that the cushion (4) has a larger area than the face (12) of the battery (1) located opposite.
3. Véhicule selon l’une des revendications précédentes, caractérisé en ce que le coussin (4) s’étend au moins sur la hauteur de la partie (21) en saillie vers l’avant du silencieux d’échappement (2). 3. Vehicle according to one of the preceding claims, characterized in that the cushion (4) extends at least over the height of the part (21) projecting towards the front of the exhaust silencer (2).
4. Véhicule selon la revendication précédente, caractérisé en ce que le coussin (4) présente une surépaisseur comprise entre 0,5 et 2,0 cm en regard de la partie (21) en saillie vers l’avant du silencieux d’échappement (2). 4. Vehicle according to the preceding claim, characterized in that the cushion (4) has an extra thickness of between 0.5 and 2.0 cm opposite the part (21) projecting towards the front of the exhaust silencer ( 2).
5. Véhicule selon l’une des revendications 1 à 3, caractérisé en ce que le coussin (4) a une épaisseur uniforme comprise entre 0,5 et 2,0 cm. 5. Vehicle according to one of claims 1 to 3, characterized in that the cushion (4) has a uniform thickness of between 0.5 and 2.0 cm.
6. Véhicule selon la revendication précédente, caractérisé en ce que le coussin (4) s’étend sur toute la hauteur de la face avant du silencieux d’échappement (2). 6. Vehicle according to the preceding claim, characterized in that the cushion (4) extends over the entire height of the front face of the exhaust silencer (2).
7. Véhicule selon l’une des revendications précédentes, caractérisé en ce que le coussin (4) est réalisé avec un matériau déformable dont la densité est comprise entre 0,1 et 0,65. 7. Vehicle according to one of the preceding claims, characterized in that the cushion (4) is made of a deformable material whose density is between 0.1 and 0.65.
8. Véhicule selon l’une des revendications précédentes, caractérisé en ce que le coussin (4) est fixé sur la face avant dudit écran thermique (3) par collage. 8. Vehicle according to one of the preceding claims, characterized in that the cushion (4) is fixed to the front face of said heat shield (3) by gluing.
9. Véhicule selon l’une des revendications 1 à 7, caractérisé en ce que le coussin (4) et l’écran thermique (3) sont réalisés en une seule pièce. 9. Vehicle according to one of claims 1 to 7, characterized in that the cushion (4) and the heat shield (3) are made in one piece.
10. Véhicule selon l’une des revendications précédentes, caractérisé en ce que ladite batterie est une batterie de traction de véhicule hybride montée à l’avant du silencieux (2), ledit coussin (4) étant destiné à absorber l’énergie cinétique résultant d’un impact à l’arrière dudit véhicule. 10. Vehicle according to one of the preceding claims, characterized in that said battery is a hybrid vehicle traction battery mounted in front of the silencer (2), said cushion (4) being intended to absorb the resulting kinetic energy. from an impact at the rear of said vehicle.
EP20709275.0A 2019-03-07 2020-02-05 Motor vehicle equipped with an impact protection device for underfloor elements Withdrawn EP3934940A1 (en)

Applications Claiming Priority (2)

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FR1902308A FR3093481B1 (en) 2019-03-07 2019-03-07 MOTOR VEHICLE EQUIPPED WITH A PROTECTION DEVICE AGAINST IMPACT OF UNDERFLOOR ELEMENTS
PCT/FR2020/050190 WO2020178493A1 (en) 2019-03-07 2020-02-05 Motor vehicle equipped with an impact protection device for underfloor elements

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EP3934940A1 true EP3934940A1 (en) 2022-01-12

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EP (1) EP3934940A1 (en)
CN (1) CN113557175A (en)
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JP7359043B2 (en) * 2020-03-06 2023-10-11 マツダ株式会社 Vehicle side body structure
FR3122133A1 (en) 2021-04-27 2022-10-28 Psa Automobiles Sa HEAT SCREEN IN A MOTOR VEHICLE
FR3134367B1 (en) * 2022-04-08 2024-02-23 Psa Automobiles Sa BATTERY CHARGER PROTECTION DEVICE FOR ELECTRIC AND HYBRID VEHICLES

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US10468645B2 (en) * 2015-01-29 2019-11-05 Ford Global Technologies, Llc Vehicle frame mounted high voltage battery assembly
US10938002B2 (en) * 2015-05-06 2021-03-02 A123 Systems Llc Battery crush protection system
FR3036359A1 (en) 2015-05-19 2016-11-25 Peugeot Citroen Automobiles Sa ASSEMBLY COMPRISING A DEVICE FOR PROTECTING A VEHICLE SUB-FLOOR ELEMENT
FR3036664B1 (en) * 2015-06-01 2017-06-09 Peugeot Citroen Automobiles Sa REAR UNDER-FLOOR ASSEMBLY OF A MOTOR VEHICLE COMPRISING A DEVICE FOR RECYCLING FUEL VAPORS
JP6642346B2 (en) * 2016-09-09 2020-02-05 トヨタ自動車株式会社 Vehicle undercarriage
FR3056950A1 (en) * 2016-10-03 2018-04-06 Peugeot Citroen Automobiles Sa PASSIVE SECURITY METHOD IN CASE OF REAR COLLISION OF A MOTOR VEHICLE AND REAR EXHAUST MUFFLER IMPLEMENTING SAID METHOD
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JP6683779B2 (en) * 2018-08-31 2020-04-22 本田技研工業株式会社 Battery pack cooling structure

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US11299025B2 (en) 2022-04-12
FR3093481A1 (en) 2020-09-11
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WO2020178493A1 (en) 2020-09-10
CN113557175A (en) 2021-10-26

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