Abstract:
The invention relates to an automobile, comprising an electric engine powered by a power supply module ( 10 ) to which a pipe ( 11 ) for extracting the hot air generated by said module is connected, and a structure including a floor ( 2 ) defining the lower portion of the vehicle passenger compartment. According to the invention, one of the ends ( 12 ) of said extraction pipe ( 11 ) is in communication with an opening ( 3 ) formed in the floor ( 2 ) of the vehicle.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is the US National stage, under 35 U.S.C. §371, of International App. No. PCT/FR2010/051336 which claims the priority to French Application No. 0954996 which was filed on Jul. 17, 2009. 
     
    
     BACKGROUND OF THE INVENTION 
       [0002]    The present invention relates to an automotive vehicle comprising an electric motor powered by a power supply module, and a structure comprising a floor plate delimiting the lower part of the vehicle cabin. 
         [0003]    Traditionally, an exhaust duct is connected to the power supply module in order to evacuate the hot air produced in the power supply module during its operation. 
         [0004]    It is indeed necessary to evacuate the hot air produced by the power supply module, for instance a battery, in order to ensure its proper functioning. If the hot air is not evacuated, the power supply module and its different components run the risk of being damaged, resulting in their breakdown. 
         [0005]    In addition, if the hot air is not evacuated it may cause discomfort to the passengers. 
         [0006]    It is therefore necessary to provide for the evacuation of the hot air. 
         [0007]    As shown in US2008/1096957, the free end of the exhaust duct can be located between the external skin of the vehicle and a trim panel of the trunk. 
         [0008]    However, this location requires an adaptation of the external skin of the vehicle and/or its various linings, which entails an extra cost when these parts must be common for vehicles equipped with internal combustion, electrical and/or hybrid powertrains. 
       BRIEF SUMMARY 
       [0009]    The goal of the invention is to remedy this disadvantage by proposing a concept which avoids the above mentioned problems, while ensuring proper evacuation of the heat. 
         [0010]    Therefore, the goal of the invention is an automotive vehicle comprising an electric motor powered by a power supply module to which is connected an exhaust duct for the hot air produced by the module. A structure comprising a floor plate delimits or defines the lower part of the vehicle cabin, and one of the extremities of the exhaust duct leads to an opening made in the floor plate of the vehicle. 
         [0011]    According to specific implementation modes, the vehicle comprises one or more of the following characteristics, taken in isolation or in all possible technical combinations:
       the extremity of the exhaust duct can be mounted to the opening by means of a flange which is shaped complimentary to the opening;   the perimeter of the opening can comprise a rib in order to ensure a tight seal between the edge of the opening and the flange;   a seal may be installed between the edge of the opening and the rib;   the opening can be situated between a cross beam delimiting the rear wall of the trunk of the vehicle and a wheel well delimiting a part of the housing surrounding the upper part of a wheel;   the opening can be situated between a part fixed to the floor plate, extending in vertical direction, and a frame bar supporting the sheet metal forming the floor surface;   the opening can be situated between a closing part linking the cross beam to the wheel well and a frame bar extending between the wheel well and the power supply module;   a blower, used to accelerate the evacuation of hot air, can be installed upstream of the extremity of the exhaust duct and downstream of the power supply module;   the power supply module can include a battery.       
 
     
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
         [0020]    The characteristics and advantages of the invention will become clear in the following description, given for illustrative purposes and with reference to the attached drawings, in which: 
           [0021]      FIG. 1  is a schematic view in perspective of the rear end of an automotive vehicle in which a battery is installed; 
           [0022]      FIG. 2  is a schematic view in perspective of a zone of the rear end shown in  FIG. 1 , in which is situated an evacuation system for the hot air of the battery; and 
           [0023]      FIG. 3  is a view of a part of the floor plate shown in  FIG. 2  with the hot air evacuation system removed. 
       
    
    
     DETAILED DESCRIPTION 
       [0024]      FIG. 1  shows a portion of the structure  1  of the vehicle. This vehicle comprises an electric motor powered by a power supply module  10 . 
         [0025]    In a known manner, structure  1  comprises at least a floor plate, delimiting the lower part of the vehicle cabin, which carries elements intended for construction the inside of the vehicle. In  FIG. 1 , only the rear portion  2  of the floor plate is shown. 
         [0026]    The floor plate is made in a traditional manner by an assembly of stamped plates, which are welded together. Furthermore, the floor plate comprises structural elements such as frame bars and cross beams, not shown, supporting the sheet metal forming the surface of the floor; and in particular the sheet metal  9  forming the load carrying floor plate situated in the trunk  6  of the vehicle. 
         [0027]    The rear end of the vehicle, shown in  FIG. 1 , comprises a trunk  6  of which the upper part is delimited by a trunk panel, not shown, and the rear part by a cross beam  7  and the lower part by the load carrying floor plate  9 . 
         [0028]    In the following, we will only describe the left side of the vehicle, comprising the zone of the invention; while the right side corresponds with a traditional arrangement. 
         [0029]    As shown in  FIG. 1 , a wheel well  5  extending in vertical direction is welded to the load carrying floor plate  9  and to the frame bar arranged in its proximity. The upper part of the wheel well  5  is fixed to the external skin of the vehicle, not shown, through the intermediary of structural parts, not shown, in order to delimit a housing receiving the upper part of the wheel. 
         [0030]    A closing part  8 , extending in vertical direction, is welded to the load carrying floor plate  9  and connects cross beam  7  to wheel well  5  in such a manner as to delimit a zone A between cross beam  7 , closing part  8 , and wheel well  5  and, in its lower part by a portion  2   a  of the load carrying floor plate  9  delimited by a frame bar, not shown, extending between the wheel well  5  and the power supply module  10 . 
         [0031]    The power supply module  10  is installed near the load carrying floor plate  9 , in the proximity of the trunk  6  of the vehicle, behind the second row of seats. It is mounted to cross beams or frame bars spaced nearby. 
         [0032]    The power supply module  10  can include any device intended to transmit energy and/or power to the electric motor. This device can for instance comprise unitary elements, such as lead acid batteries, Li-ion cells, with prismatic or cylindrical shape, or shaped like a soft bag and connected to each other by electrical circuits. The power supply module  10  further comprises a container and cover, forming a rigid storage place, intended to receive and protect the device transmitting energy and/or power. In the example shown in  FIG. 1 , the power supply module  10  is a battery. 
         [0033]    The extraction of hot air from the battery  10  takes place through the intermediary of a pipe  11 . The extremity  12  of this pipe leads the air towards the exterior of the vehicle. A blower, not shown, located upstream of extremity  12  and downstream of the battery  10 , is used to accelerate the evacuation of hot air. 
         [0034]    The extremity  12  of the pipe  11  leads to an orifice  3  made in the floor plate  2  of the vehicle. The extremity  12  of the pipe  11  is mounted by means of a flange  13  secured to the pipe extremity  12 . The orifice  3  and flange  13  are shaped complementarily to each other in order to install flange  13  on orifice  13  in sealed manner. According to the shown implementation mode, the orifice  3  and flange  13  have a triangular shape. 
         [0035]    More specifically, orifice  3  is formed in part  2   a  of the load carrying floor plate  9  located in the above-described zone A. Orifice  3  is located between cross beam  7  and wheel well  5  and between closing piece  8  and the frame bar extending between wheel well  5  and the power supply module  10 . 
         [0036]    Preferably, a rib  4  is provided in the perimeter of orifice  3  at a distance of 5 to 20 mm from the edge of orifice  3 . This rib  4  is formed in a stamping operation and has the shape of a bead. 
         [0037]    The purpose of this rib  4  is to improve the sealing between the edge of orifice  3  and flange  13  in order to avoid noise due to leaks of hot air coming from pipe  11  and air entering between these parts at certain driving speeds of the vehicle. 
         [0038]    In addition, rib  4  prevents infiltration of moisture or contamination. 
         [0039]    Preferably, a seal, not shown, is installed between the edge of orifice  3  and rib  4 . 
         [0040]    Advantageously, an interior trim, not shown, masks pipe  11  and the above-described hot air evacuation system, in other words flange  13  and orifice  3 . Thus the blower, pipe  11  and the hot air evacuation system are installed between the exterior panel of the vehicle and the interior trim in such way that they are masked and therefore not visible to the user of the vehicle. 
         [0041]    In view of the above-described hot air evacuation system, the exterior skin of the vehicle and its various linings need not be adapted and remain the same regardless of whether the vehicle, designed according to the above-described structure, has internal combustion, hybrid or electric propulsion. The floor plates of vehicles requiring this feature are adapted by performing only a cutting and forming operation, in order to make the rib. These operations entail a simple and inexpensive modification of the tooling used to produce floor plate  2 . 
         [0042]    In addition, the location of this installation limits for the passengers the noise nuisance due to the operation of the blower. 
         [0043]    Obviously, the invention is not limited to the above-described implementation mode. The extremity of the hot air exhaust duct can be connected to other appropriate locations of the floor.