Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62D—MOTOR VEHICLES; TRAILERS
  • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
  • B62D25/08—Front or rear portions
  • B62D25/087—Luggage compartments
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62D—MOTOR VEHICLES; TRAILERS
  • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
  • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
• • 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
  • 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

Definitions

• the present invention relates to motor vehicles of the hybrid or electric type equipped with a propulsion battery. It is aimed in particular at those whose propulsion battery is located above the load floor or below a raised portion of this load floor.
• Motor vehicles of the electric type include only an electric motor.
• Hybrid-type motor vehicles include an electric motor in addition to a combustion engine.
• the two motors operate simultaneously or alternately so as to reduce the total power consumed by the vehicle.
• the electric motor propulsion battery is generally housed in a parallelepiped-shaped metal casing located in the rear part of the vehicle under the rear passenger seats or in the boot area.
• the casing housing the propulsion battery When the casing housing the propulsion battery is arranged in the boot area, it can be installed above the load floor of the vehicle extending longitudinally between the landing gear crossmember and the rear panel lining carrying the locking striker of the vehicle's door or tailgate, and transversely between the two rear side members. [7] This casing can also be installed below this load floor at a raised portion of the latter in order to maintain sufficient ground clearance.
• the propulsion batteries located in the boot area are particularly exposed in the event of collisions at the rear part of the vehicle.
• a rear impact at high speed can, for example, cause significant deformation of the rear panel which, when moving forward, can impact the casing and damage certain battery cells, so as to cause liquid leaks which can lead to the risk of electrocution or burns. for passengers.
• this crossmember makes it possible to transmit a large part of the forces caused by the deformation of the rear panel sub-assembly to the two rear side members, so as to protect the casing and the drums.
• the present invention therefore aims to improve the situation.
• a motor vehicle of the hybrid or electric type comprising a load floor extending longitudinally between a cross member and a rear panel lining carrying a striker plate. locking of a door or boot lid, and transversely between two rear side members; said vehicle also comprising a propulsion battery housed in a casing located above said load floor or below a raised portion of this same floor, as well as a device for protecting said battery comprising a cross member extending fixedly between said rear beams above a portion of said load floor located behind said casing; characterized in that said protective device also comprises a retaining member rigidly fixed to said crosspiece and comprising a low wall extending above said crosspiece along at least a part of this crosspiece located opposite of said locking striker.
• the invention thus makes it possible to substantially reduce or even virtually eliminate the longitudinal gap between the crosspiece of the protective device and the rear panel lining, so as to make it possible to increase the volume of the propulsion battery and consequently the range of the vehicle in electric propulsion mode.
• said low wall extends in height to a level at least equal to that of the upper face of said casing
• said retaining member also comprises a guide ramp extending forwards from the upper edge of said low wall
• said guide ramp extends longitudinally to the rear end of the upper face of said casing
• said retaining member comprises a flange rigidly fixed to the top of said crosspiece and from which said low wall extends;
• said retaining member comprises at least one square-shaped stiffening rib fixedly backed by two of its adjacent sides respectively to said footing and to said low wall;
• - Said retainer is made of sheet metal.
• FIG 1 shows a partial perspective view of the rear part of the body structure of a hybrid type motor vehicle according to a first embodiment of the invention on which is mounted a propulsion battery;
• FIG. 20 is a sectional view taken along a vertical longitudinal plane of the rear part of the body structure of the vehicle of Figure 1;
• FIG. 1 shows an enlargement in perspective of the installation area of the battery protection device.
• Figure 1 shows a partial perspective view of the rear part of the body structure 100 of a hybrid-type motor vehicle on which is mounted a propulsion battery 200.
• substantially will be used to indicate that a slight deviation is allowed from a predetermined nominal position or arrangement, while remaining within the scope of the invention.
• substantially vertical will indicate that a deviation of the order of 15° relative to a strictly vertical orientation is permitted within the scope of the invention.
• the rear part of the body structure 100 of the vehicle 1 is constituted in the conventional manner by several sub-assemblies made beforehand and then assembled together on the fitting line of the vehicle, namely a sub-assembly of the base 110 , two silhouette side subassemblies of which only the right one 120 is partially visible in FIG. 1, a rear panel subassembly 130, and a flag subassembly not shown in the figures.
• the rear panel subassembly 130 comprises a rear panel 131 (visible in Figure 3) and its lining 132 on which is fixed a locking striker 133 of the door or the tailgate, not shown.
• the underbody subassembly 110 has a load floor
• This base sub-assembly 110 also includes two lateral floor extensions 115 (only the right one being visible in Fig. 1, while the left one is symmetrically similar to it) extending from the outer side of the rear parts of the two longitudinal beams rear 113, 114, as well as two wheel arches 116 extending on either side of the central and front parts of the load floor 111 in front of the lateral floor extensions 115 (only the right wheel arch being visible in Figure 1 while the one on the left is symmetrically similar to it).
• the load floor 111 comprises a raised portion 111 A defining a cavity of substantially parallelepiped shape, as well as a rear portion 111 B extending longitudinally between its raised portion 111 A and the rear panel liner 132.
• the propulsion battery 200 is housed in a casing 210 located under the raised portion 111A of the load floor 111 being partially housed in said cavity, so as to preserve sufficient ground clearance while limiting the reduction in the useful load volume of the boot of vehicle 1.
• the casing housing the propulsion battery could be installed above the load floor, preferably at the level of a recess defining a cavity partially housing it.
• the housing 210 consists of two hollow upper 211 and lower 212 parts arranged one above the other and bordered by two superimposed peripheral flanges.
• the vehicle 1 also comprises a protection device 300 making it possible to limit or even prevent the deformation of the casing 210 of the battery 200 (so as to avoid the deterioration of the electrochemical cells of the battery module(s) housed in this casing 210 ) in response to deformation of the rear panel subassembly 130 resulting from a high speed rear impact.
• this protection device 300 comprises a crosspiece 310 extending transversely between the two rear beams 113, 114 to which it is rigidly fixed, behind the casing 210 and above the rear portion 111 B of the load floor 111.
• the crosspiece 310 is preferably constituted by a hollow metal tubular section of rectangular section.
• the material and the thickness of this profile can be advantageously modulated according to the resistance to deformation desired for this crosspiece 310.
• the fixing of the crosspiece 310 to the rear beams 113, 114 is preferably provided by means of two metal connecting parts 311, 312 welded to the two ends of this crosspiece 310 and fixed by bolting or welding to these two rear beams 113, 114.
• This cross member 310 is also rigidly fixed to the rear end of the housing 210 and to the rear portion 111 B of the load floor 111 by bolting at several points (three in this case) distributed along this cross member 310 , each bolt B successively passing through a bore made in the crosspiece 310, a hole made in the rear portion 111 B of the load floor 111, a spacer 117 and two superimposed orifices formed in the rear portions of the peripheral collars of the upper 211 and lower 212 parts of the casing 210 (see FIG. 2).
• this crosspiece 310 makes it possible to transmit a large part of the forces caused by the deformation of the rear panel subassembly 130 to the two side members rear 113, 114, so as to protect the raised portion 111A of the floor 111 and the casing 210 housed below.
• the protection device 300 also comprises a retainer 320 comprising a sole 321 rigidly fixed on the top of said crosspiece 310, as well as a low wall 322 extending from the front edge of this sole. 321 above the crosspiece 310 and along at least part of this crosspiece 310 located opposite the locking striker 133.
• the sole 321 is fixed to the crosspiece 310 via two of the bolting points ensuring the fixing of this crosspiece 310 to the rear end of the housing 210 and to the rear portion 111B of the load floor 111.
• this sole 321 is provided with two holes provided near its two ends.
• this sole 321 can be welded to the upper face of the crosspiece 310 between two of the holes in this crosspiece 310 allowing it to be fixed by bolting to the rear end of the casing 210 and to the rear portion 111 B of the floor load 111.
• Such a solution has the advantage of being able to optimize the width of the retainer 320 by centering it laterally with respect to the locking striker 133.
• the low wall 322 of this retainer 320 makes it possible to block the advance of the locking striker 133 passing above the crosspiece 310 and to prevent this keeper 133 from impacting the casing 210, so as to avoid any risk of deformation and drilling of this casing 210 which could lead to the deterioration of certain electrochemical cells of the battery 200.
• the retainer 320 is advantageously configured so that its low wall 322 is oriented along a substantially vertical transverse plane (ie perpendicular to the longitudinal axis of the vehicle 1).
• this low wall 322 extends in height to a level at least equal to that of the upper face of the housing 210.
• the retainer 320 also advantageously includes a guide ramp 323 extending forward from the upper edge of the low wall 322
• the guide ramp 323 thus makes it possible, if ever the locking striker 133 manages to pass over this low wall 322, to guide this striker 133 longitudinally to the raised portion 111 A of the load floor 111 (or to the top of the casing in the case where the latter is installed above the load floor) by preventing it from descending into the space separating the retaining member 320 from this raised portion 111 A of the load floor.
• load 111 (or of the casing in the case where the latter is located above the load floor) and impact the casing 210 while continuing to advance.
• this guide ramp 323 can extend longitudinally to the rear end of the upper face of the housing 210.
• the retaining member 320 advantageously comprises one or more square-shaped stiffening ribs 324 each fixedly backed by two of their sides respectively adjacent to the sole 321 and at wall 322.
• This retainer 320 is preferably made of sheet metal by mechanical welding.
• the sole 321, the low wall 322, as well as the guide ramp 323 are for example made from the same sheet of metal sheet cut and bent.
• the stiffening ribs 324 are produced independently and then fixed by welding to the sole 321 and to the wall 322. j

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Body Structure For Vehicles (AREA)
• Hybrid Electric Vehicles (AREA)
• Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=77913186

Family Applications (1)

Country Status (3)

Family Cites Families (7)

• 2021
  • 2021-06-14 FR FR2106229A patent/FR3123879A1/fr active Pending
• 2022
  • 2022-05-03 EP EP22725919.9A patent/EP4355640A1/de active Pending
  • 2022-05-03 WO PCT/FR2022/050851 patent/WO2022263734A1/fr active Application Filing

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