Classifications

• • 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
  • B60R13/0815—Acoustic or thermal insulation of passenger compartments
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
  • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
  • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
  • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
  • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
  • B60R16/04—Arrangement of batteries
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2266/00—Composition of foam
  • B32B2266/02—Organic
  • B32B2266/0214—Materials belonging to B32B27/00
  • B32B2266/0278—Polyurethane
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
  • B32B2307/102—Insulating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2605/00—Vehicles
• • 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
  • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
  • B60Y2200/00—Type of vehicle
  • B60Y2200/90—Vehicles comprising electric prime movers
  • B60Y2200/91—Electric vehicles
• • 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
  • B60Y2306/09—Reducing noise
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
  • E04F2290/00—Specially adapted covering, lining or flooring elements not otherwise provided for
  • E04F2290/04—Specially adapted covering, lining or flooring elements not otherwise provided for for insulation or surface protection, e.g. against noise, impact or fire
  • E04F2290/041—Specially adapted covering, lining or flooring elements not otherwise provided for for insulation or surface protection, e.g. against noise, impact or fire against noise
• • 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
  • Y02T10/64—Electric machine technologies in electromobility
• • 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 present invention relates to a vehicle provided with a sound absorption element between a floor and an electric battery.
• X is a front-rear longitudinal axis of the vehicle oriented towards the rear
• Y is a transverse axis directed towards the right of the vehicle
• Z is a vertical axis directed upwards.
• a layer of foam is inserted between a floor of the vehicle and said battery, which is placed under said floor.
• This layer of foam acts as a sound absorption element in order to limit the noise produced by the vibrations of the electric battery when the vehicle is in the driving phase.
• Application DE102019002599 A1 describes a battery box arrangement on a motor vehicle chassis.
• This arrangement which allows the battery case to be removed without damaging it, comprises a foam acoustic absorption element, placed between a floor and a battery cover. Sealing elements in the form of seals are positioned on the battery box.
• a disadvantage of this type of arrangement is that it involves a large number of parts, resulting in longer assembly time, greater sources of error and therefore significant additional costs.
• a vehicle according to the invention has an arrangement involving a sound absorption element inserted between the floor and an electric battery placed under said floor, and overcoming the drawbacks encountered in the state of the art.
• the subject of the invention is a vehicle comprising a floor and an electric battery placed under said floor, said vehicle further comprising a layer of sound-absorbing foam inserted between the floor and said battery so that said layer has an upper surface which is contact with the floor and a lower surface which is in contact with said battery.
• At least one of said two surfaces forms at least one joint intended to increase the acoustic absorption of the foam inserted between the floor and the battery.
• a gasket is an integral part of the sound-absorbing foam and is used to increase the performance of said foam in terms of sound absorption, while ensuring a good seal between the foam and the floor, and/or between the foam and the electric battery. It is used to improve the conditions of contact between the foam and the floor and/or the battery.
• This gasket can take any shape, for example being constituted by a rib emerging from the surface on which it is placed, or by being for example constituted by a groove hollowed out in said surface.
• the foam extends over the entire surface of the floor.
• the floor has a rectangular shape and the foam also has a rectangular shape.
• each of the two surfaces forms a seal.
• the shape of the joints is identical on the two surfaces of the foam.
• each joint of one of the two surfaces is aligned in a vertical direction with a joint of the other surface.
• the seal is constituted by a rib creating a bead emerging from the surface.
• a joint thus increases the dimensions of the foam.
• the cross section of the joint is rectangular, a large side L of this cross section materializing the width of the joint and a short side I thereof corresponding to the height of the joint relative to the surface of the foam from which it emerges.
• This is a form of cross section which is particularly suitable for the vehicle according to the invention, to increase the acoustic absorption of the foam, but which is in no way limiting.
• the joint is materialized by a groove creating a groove in the surface of the foam in which it was dug.
• the close contact between the foam and the floor and the battery is achieved by means of a depression created in the groove between said foam and said floor and said battery.
• said foam is found lightened.
• the cross section of the groove representing the seal is rectangular. This is a cross-sectional shape which is particularly suitable for a vehicle according to the invention to increase the acoustic absorption of the foam, but which is in no way limiting.
• the seal extends over the entire periphery of the surface of the foam.
• the seal will pass for example over the side members, and will be particularly effective in helping to increase the acoustic absorption of the foam.
• the periphery corresponding to the space between the outer edge delimiting the foam, and a fictitious inner edge having the same profile as that of said outer edge but with smaller dimensions, the width of said space being less than 10cm.
• the joint forms a closed loop on the surface of the foam.
• This loop can take any shape and can for example be square, rectangular or circular.
• the loop is rectangular in shape. Indeed, since in a good part of the cases the foam is rectangular in shape, it is desirable that the seal forms a rectangular loop to follow the contour of said foam.
• the foam is made of polyurethane and has a polyethylene film.
• This is an example of foam particularly suitable for a vehicle according to the invention, but which is in no way limiting.
• a vehicle according to the invention has the advantage of having a foam which is particularly effective vis-à-vis acoustic absorption between the floor and the electric battery, thanks to a judicious addition of a seal on the foam, requiring neither a change of foam nor the addition of bulky additional parts.
• a vehicle according to the invention has the advantage of having a foam interposed between the floor and the electric battery, which has a dual function: that of ensuring improved sound absorption and that of ensuring good sealing with the floor and/or the electric heater.
• FIG. 1 represents a side view in an XZ plane of a zone of a vehicle according to the state of the art, comprising a floor, a sound absorption foam and an electric battery
• FIG. 2 represents an enlarged view of part of the area of FIG. 1, showing the foam of a first embodiment of a vehicle according to the invention
• FIG. 3 represents an enlarged view of part of the area of FIG. 1, showing the foam of a second embodiment of a vehicle according to the invention
• FIG. 4 shows a perspective view of a foam of a vehicle according to the invention, showing a seal on an upper surface of said foam.
• a vehicle 1 according to the state of the art comprises a floor 2 extending in a substantially horizontal plane XY when the vehicle itself rests on horizontal ground, and an electric battery 3 housed in a box 4.
• the box 4 When the battery 3 is mounted in the vehicle, the box 4 is found under the floor 2 and has a flat upper face 5 extending in a horizontal plane XY when the vehicle 1 itself rests on horizontal ground .
• a space 6 Between the floor 2 and the upper surface 5 of the box 4, there remains a space 6 which is filled by a layer of foam 7, preferably made of polyurethane with a polyethylene film.
• the upper surface 5 of the box 4 and the floor 2 have substantially the same dimensions along a horizontal plane XY, and the foam 7 is inserted between the floor 2 and said upper surface 5 over substantially the entire horizontal surface of these two elements 2, 5. It is advantageously assumed that the floor 2, the upper surface 5 of the box 4 and the foam 7 have the same dimensions and are rectangular in shape. This foam 7 is compressed between the floor 2 and the upper surface 5 of the box 4, and serves to absorb all the sounds and noises which would be emitted between said box 4 and said floor 2 when the vehicle is in a rolling phase. However, such a layer of foam 7 showed some small shortcomings in terms of sound absorption.
• a foam 17 of a vehicle 10 according to the invention has improved sound absorption properties, by implementing at least one seal 20, 30 intended to come crashing down both against the floor 2 and against the upper surface 5 of the box 4.
• the foam 17 has an upper surface 18 intended to come into contact with the floor 2 and a lower surface 19 intended to come into contact with the upper surface 5 of the box 4, said two surfaces 18, 19 being parallel and extending horizontally when the vehicle 10 rests on horizontal ground.
• the upper surface 18 and the lower surface 19 of the foam 17 each has a seal 20 in the form of a rib emerging of said surface 18, 19.
• the joint 20 of one surface 18, 19 and the joint 20 of the other surface 18, 19 protrude in two opposite directions along a vertical axis Z, and create an extra thickness tending to widen the layer of foam 17.
• the seals 20 of the two surfaces 18, 19 are identical and have a cross section of rectangular shape, a long side L of this cross section materializing the width of the seal 20 and a short side I of said cross section corresponds to the height of the seal 20, 30 relative to the surface 18, 19 of the foam 17 on which it is placed.
• gasket 20 extends over upper surface 18 or over lower surface 19 forming a closed loop having a shape rectangular.
• the dimensions of this rectangular loop are smaller than those of the two surfaces 18, 19 of the foam 17 from which the seal 20 emerges.
• the seal 20 runs along the contour of the surface 18, 19 from which it emerges and extends therefore on the periphery of said surface 18, 19.
• the remaining spacing between the contour of the surface 18, 19 and the seal 20 is less than 10cm, and preferably is less than 5cm.
• the seal 20 is made of the same material as that of the foam 17 and advantageously the foam 17 and the seal 20 form a common part made by molding.
• the seal 20 is an added piece which is fixed to the foam 17.
• the seal 20 thus contributes to improving the sound absorption properties of the foam 17, and to ensuring a good seal between this foam 17 and the two elements constituted by the floor 2 and the upper surface 5 of the box 4.
• the upper surface 18 and the lower surface 19 of the foam 17 each has a seal 30 in the form of a hollow groove in said surface 18, 19.
• the groove materializing the joint 30 of each surface 18, 19 is delimited by a bottom 31 and by two parallel side walls 32, 33, said two side walls 32, 33 being perpendicular to said bottom 31 .
• the groove 30 of one surface 18, 19 and the groove 30 of the other surface 18, 19 are dug along a vertical axis Z, so that the distance separating the bottoms 31 of the two grooves 30 represents the minimum distance separating said grooves 30.
• the grooves 30 of the two surfaces 18, 19 are identical and each have a cross section of rectangular shape.
• seal 30 extends over upper surface 18 or lower surface 19 forming a closed loop having a rectangular shape.
• the dimensions of this rectangular loop are smaller than those of the two surfaces 18, 19 of the foam 17 in which were dug the grooves 30.
• the seal 30 runs along the contour of the surface 18, 19 in which it was dug and therefore extends around the periphery of said surface 18, 19.
• the remaining spacing between the contour of the surface 18, 19 and joint 30 is less than 10cm, and preferably is less than 5cm.
• This depression created at the seals 30, will thus contribute to improving the conditions of contact between the foam 17 and the floor 2 and between the foam 17 and the upper surface 5 of the box 4. It follows that these seals 30 will thus contribute to improve the sound absorption properties of the foam 17, and to ensure a good seal between this foam 17 and the two elements constituted by the floor 2 and the upper surface 5 of the box 4.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Acoustics & Sound (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
• Body Structure For Vehicles (AREA)
• Soundproofing, Sound Blocking, And Sound Damping (AREA)
• Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Citations (1)

Family Cites Families (12)

• 2020
  • 2020-09-30 FR FR2009951A patent/FR3114539B1/fr active Active
• 2021
  • 2021-09-20 WO PCT/EP2021/075829 patent/WO2022069285A1/fr not_active Ceased
  • 2021-09-20 CN CN202180062607.0A patent/CN116056952A/zh active Pending
  • 2021-09-20 KR KR1020237008430A patent/KR20230074123A/ko active Pending
  • 2021-09-20 US US18/245,953 patent/US12503064B2/en active Active
  • 2021-09-20 EP EP21782895.3A patent/EP4222008A1/de active Pending
  • 2021-09-20 JP JP2023515342A patent/JP7818582B2/ja active Active

Patent Citations (1)

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