JP2018069872A - Electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric vehicle with the vibration of a battery pack suppressed, thus suppressing the generation of noise due to the vibration.SOLUTION: A vehicle 10 includes: seats 20, 22, 24 disposed inside a compartment 16; a seat frame part 30 for retaining the seats 20, 22, 24 and causes the seats 20, 22, 24 fixed onto a vehicular body 18 or move in vertical direction of the vehicle; a battery pack 40 that internally houses a vehicle-driving secondary battery, is disposed underneath the seat frame part 30 with a side facing the seat frame part 30 as an upper face side, and is fixed to the vehicular body 18; and a vibration dumper member 50 disposed in sandwich between the seat frame part 30 and the upper surface of the battery pack 40.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to an electric vehicle, and more particularly, to an electric vehicle in which a battery pack is disposed under a seat in a vehicle interior.

  The luggage space for storing the secondary battery for driving the electric vehicle is a luggage space behind the seat of the vehicle. In this case, the space as the luggage compartment is narrowed, and the luggage compartment space is reduced. If it tries to secure widely, a vehicle will enlarge.

  Therefore, Patent Document 1 discloses a vehicle-use space in a space surrounded by a rigid floor panel such as a side member of a vehicle and a rigid structure of a seat frame that supports a rear seat of the vehicle above the floor panel. It is disclosed that a battery unit or the like is arranged.

  In Patent Document 2, in an electric vehicle, an opening is provided in a portion of the floor panel below the seat, and a case having a fixed end at the edge of the opening is suspended below the floor panel, covers the opening, and covers the seat side. A configuration in which a cover that swells to a floor is attached to a floor panel is disclosed. Here, the battery is fixed and stored in the case body in a space surrounded by the case and the cover.

  As a technique related to the present disclosure, Patent Document 3 discloses that a floor of a vehicle is configured by a floor panel and a riser panel that is arranged on the floor panel and is covered with a carpet on the upper surface side. Yes. Here, in order to prevent wrinkling of the carpet, a slide rail that moves the seat in the front-rear direction of the vehicle is fixed to the riser panel with the carpet interposed therebetween.

Japanese Patent Application Laid-Open No. 2014-073739 Japanese Patent Laying-Open No. 2015-081042 JP 2003-159278 A

  When the battery pack is placed under the seat, if the battery pack with a large mass vibrates due to the vibration of the vehicle, the battery pack may come into contact with the seat frame to generate noise, which may damage the battery pack or the seat frame. . In order to prevent this, if a sufficient gap is provided between the seat frame and the battery pack, the seat height from the floor surface increases. Although it is possible to absorb vibration with a bracket that supports the battery pack, attempting to secure sufficient strength of the bracket, etc., increases the plate thickness and cross-sectional area, narrows the cabin space, and increases costs. Become. Therefore, there is a demand for an electric vehicle that can suppress the vibration of the battery pack and suppress the generation of abnormal noise due to the vibration.

  An electric vehicle according to the present disclosure includes a seat provided in a vehicle interior, a seat frame portion that holds the seat and fixes the seat to the vehicle body or moves in the vehicle front-rear direction, and a secondary battery for driving the vehicle inside A battery pack that is disposed on the lower side of the seat frame portion with the side facing the seat frame portion as the upper surface side, and is fixed to the vehicle body, and the seat frame portion and the upper surface of the battery pack And a vibration damping material disposed so as to be sandwiched in contact therewith.

  According to the electric vehicle according to the present disclosure, since the vibration damping material is used, the vibration of the battery pack can be suppressed and the generation of abnormal noise due to the vibration can be suppressed.

1 is a configuration diagram of an electric vehicle according to an embodiment. It is an enlarged view of the A section of FIG.

  Hereinafter, embodiments will be described in detail with reference to the drawings. Hereinafter, a hybrid vehicle will be described as an electric vehicle. However, this is an example for explanation, and any vehicle including a rotating electrical machine and a battery pack may be used. For example, it may be an electric vehicle, a fuel cell vehicle, or the like. The number of sheet rows, the position of the engine, the rotating electrical machine, and the battery pack, the material, and the like described below are examples for explanation, and can be appropriately changed according to the specifications of the electric vehicle. Below, the same code | symbol is attached | subjected to the same element in all the drawings, and the overlapping description is abbreviate | omitted.

  FIG. 1 is a configuration diagram of a hybrid vehicle 10 as an electric vehicle. FIG. 2 is an enlarged view of a portion A in FIG. Hereinafter, unless otherwise specified, the hybrid vehicle 10 that is an electric vehicle is referred to as a vehicle 10. The front-rear direction and the vertical direction of the vehicle 10 are shown in FIGS. The front side in the front-rear direction is the direction on the front side of the vehicle 10, and the upper side in the vertical direction is the direction on the upper side with respect to the road surface in the vehicle 10 on the road surface. The rear side and the lower side are in the opposite directions.

  The vehicle 10 includes an engine 14 disposed in the engine room 12 and a rotating electrical machine 15. The vehicle compartment 16 is another space partitioned from the engine compartment 12, and is a space above the floor surface 19 of the vehicle body 18 that forms the skeleton of the vehicle 10, and seats 20, 22, and 24 are provided. The seats 20, 22, and 24 are seats in the passenger compartment 16 provided with a seat cushion 23 (see FIG. 2), a seat back, a headrest, and the like, respectively. The seats 20, 22, and 24 are arranged in three rows along the front-rear direction of the vehicle 10, and are referred to as a front seat 20, a second seat 22, and a third seat 24 when they are distinguished from each other. Although not a component of the vehicle 10, the driver 6 sitting on the front seat 20 and the user 8 sitting on the second seat 22 are shown. The number of seat rows, the seating position of the user 8, and the like are examples for explanation, and may be other than this.

  The seats 20, 22, and 24 have a seat frame that is a skeleton portion to which the seat cushion 23, a seat back, a headrest, and the like are attached. In this, the part which attaches the seat cushion 23 where the user 8 sits down is shown as the seat frame part 30 in particular in FIGS.

  The seat frame portion 30 is provided on each of the front seat 20, the second seat 22, and the third seat 24, and has different mechanisms depending on the type of seat. The seat frame portion 30 of the front seat 20 has a seat moving mechanism that moves the vehicle body 18 in the front-rear direction of the vehicle 10 in order to achieve a positional relationship suitable for the driving operation of the driver 6. The second seat 22 and the third seat 24 are often fixed to the vehicle body 18 without moving in the front-rear direction of the vehicle 10. In the following, the second seat 22 also has a seat moving mechanism, and the third seat 24 is fixed to the vehicle body 18 and mainly the seat frame portion 30 of the second seat 22 at the position where the battery pack 40 is disposed. Is described.

  The seat frame portion 30 of the second seat 22 has a seat rail mechanism 32 as a seat moving mechanism. The seat rail mechanism 32 includes a lower rail 31 fixed to the vehicle body 18 and an upper rail 33 attached to the seat cushion 23. The user 8 operates a seat moving handle (not shown) to slide the upper rail 33 with respect to the lower rail 31 in the front-rear direction of the vehicle 10 and lock it at a desired position. In this way, the entire second seat 22 can be moved in the front-rear direction of the vehicle 10.

  The lower rail 31 is a guide rail extending in the front-rear direction of the vehicle 10, has a mounting leg 34 on the rear end side of the vehicle 10, and is fixed to the vehicle body 18 by fastening means 36 such as bolt fastening. The support leg 38 is a member provided on the lower rail 31 so as to stand on the front end side of the vehicle 10, and contacts the side surface of the vehicle body 18 or the floor surface 19 to stabilize the height position of the lower rail 31.

  Similarly to the seat frame portion 30 of the second seat 22, the seat frame portion 30 of the front seat 20 includes a lower rail 31 and an upper rail 33. In the case of the third seat 24 fixed to the vehicle body 18, the seat frame mechanism 30 does not have the seat rail mechanism 32, and the portion of the seat frame that holds the seat cushion 23 becomes the seat frame portion 30. As described above, the seat frame portion 30 is a member that holds the seat and fixes the seat to the vehicle body 18 or moves the vehicle in the front-rear direction according to the type of the seat.

  In the battery pack 40, the secondary battery 42 is accommodated inside the pack case, and is disposed in a space 39 between the lower side of the second seat 22 and the vehicle body 18. The secondary battery 42 is an assembled battery for driving a vehicle in which a plurality of single cells are connected in series and in parallel to output a high voltage and a large current necessary for the rotating electrical machine 15. As the unit cell, a lithium ion battery, a nickel metal hydride battery, or the like can be used. The pack case is a substantially cubic case in which an upper case that is an upper member and a lower case that is a lower member are combined. The arrangement position of the battery pack 40 is the lower side of the seat frame portion 30 of the second seat 22, but this is an example for explanation, and the lower side of the seat frame portion 30 of the front seat 20 and the seat of the third seat 24. You may arrange | position in the downward side of the frame part 30. FIG. In some cases, a plurality of battery packs 40 may be distributed and arranged below the respective seat frame portions 30 of the front seat 20, the second seat 22, and the third seat 24.

  The battery pack 40 is fixed to the vehicle body 18 by fastening means 44 such as bolts using an appropriate bracket 43. In the example of FIG. 2, the bracket 43 is attached to the lower case of the battery pack 40. In FIG. 2, only one bracket 43 is shown, but a plurality of brackets 43 are used depending on the case.

  A junction box 46 disposed in a space 39 between the lower side of the second seat 22 and the vehicle body 18 is a terminal connection for connecting the power supply terminal of the battery pack 40 to the terminal from the drive circuit of the rotating electrical machine 15 or the like. Part. The monitoring box 48 disposed in the space 39 includes a circuit for monitoring the battery temperature and the like of the secondary battery 42 housed in the battery pack 40.

  The vibration buffer member 50 is a buffer member that is disposed so as to be in contact with the seat frame portion 30 and the upper surface 41 of the battery pack 40 and absorbs the vibration of the battery pack 40 caused by the vibration of the vehicle 10. The upper surface 41 of the battery pack 40 is a surface where the battery pack 40 faces the seat frame portion 30 and is the uppermost surface of the upper case of the battery pack 40. “To be sandwiched in contact with” means that the lower surface side of the vibration damper 50 is disposed on the upper surface 41 of the battery pack 40, and the upper surface side of the vibration damper 50 is pressed against the upper surface 41 of the battery pack 40 by the lower surface of the lower rail 31. It means being done. In other words, the battery pack 40 is suppressed by the seat frame portion 30 via the vibration buffer material 50. Thereby, the vibration of the battery pack 40 is effectively suppressed and the generation of abnormal noise is suppressed. Since the seat frame part 30 and the battery pack 40 are members originally provided in the vehicle 10, they are arranged so that the vibration buffer 50 can absorb and suppress the vibration of the battery pack 40 without using any special fixing means. Is done.

  As the vibration buffer material 50, a material that can suppress generation of abnormal noise due to vibration of the battery pack 40 is used. For example, a rubber sheet having a thickness slightly larger than a gap interval between the seat frame portion 30 when the vibration damping material 50 is not disposed and the upper surface 41 of the battery pack 40, or a cushioning carpet material is used. . The material of the carpet material may be the same as the material of the carpet for the passenger compartment laid on the floor surface 19 that is the upper surface of the vehicle body 18.

  By arranging the vibration cushioning material 50 between the upper surface 41 of the battery pack 40 and the seat frame portion 30, the cushioning property of the vibration cushioning material 50 and the rigidity of the seat frame portion 30 are also used. The vibration of the battery pack 40 can be suppressed. Thereby, the generation of abnormal noise due to vibration can also be suppressed. Further, damage to the seat frame 30 and the battery pack 40 due to vibration of the vehicle 10 can be suppressed.

  Furthermore, since the load of the bracket 43 for fixing the battery pack 40 to the vehicle body 18 can be reduced by the vibration cushioning material 50, damage to the bracket 43 due to vibration of the battery pack 40 can be suppressed. Thereby, the thickness of the bracket 43 and the cross-sectional area can be reduced, the number of the plurality of brackets 43 can be reduced, and the cost can be reduced while ensuring the reliability. Further, the space of the vehicle compartment 16 can be used widely and effectively by reducing the number of brackets 43 and reducing the thickness.

  In addition, the vibration damping material 50 suppresses vibration acceleration applied to the components inside the battery pack 40 due to the vibration of the vehicle 10. As a result, it is possible to reduce the size and thickness of the mounting parts for mounting these parts on the battery pack 40, reduce the number of parts, etc., and reduce costs while ensuring reliability.

  Further, conventionally, in order to prevent the interference between the battery pack 40 and the seat frame portion 30 that vibrates due to the vibration of the vehicle 10, the gap interval between the battery pack 40 and the seat frame portion 30 is set to be wide. The interval is replaced with the thickness of the vibration damping material 50. By appropriately selecting the vibration suppression performance of the material of the vibration buffer material 50, the thickness of the vibration buffer material 50 can be reduced, so that the height of the seats 20, 22, and 24 from the vehicle body 18 can be suppressed, and the passenger compartment. 16 spaces can be used effectively effectively.

  The vehicle 10 according to the present embodiment holds the seats 20, 22, 24 and the seats 20, 22, 24 provided in the passenger compartment 16, and fixes the seats 20, 22, 24 to the vehicle body 18 or A seat frame portion 30 that is moved in the vehicle front-rear direction is provided. Further, the battery pack 40 accommodates the vehicle-driven secondary battery 42 therein, and is disposed on the lower side of the seat frame portion 30 with the side facing the seat frame portion 30 as the upper surface 41 side. A battery pack 40 to be fixed is provided. And the vibration damping material 50 arrange | positioned while contacting between the seat frame part 30 and the upper surface 41 of the battery pack 40 is provided.

  6 drivers, 8 users, 10 (electric) vehicles, 12 engine compartments, 14 engines, 15 rotating electrical machines, 16 compartments, 18 vehicle bodies, 19 floors, 20 (front) seats, 22 (second) seats, 23 seats Cushion, 24 (third) seat, 30 Seat frame part, 31 Lower rail, 32 Seat rail mechanism, 33 Upper rail, 34 Mounting leg, 36, 44 Fastening means, 38 Support leg, 39 Space, 40 Battery pack, 41 Upper surface, 42 Secondary battery, 43 bracket, 46 junction box, 48 monitoring box, 50 vibration buffer.

Claims (1)

A seat provided in the passenger compartment;
A seat frame portion for holding the seat and fixing the seat to the vehicle body or moving the seat in the vehicle longitudinal direction;
A battery pack that accommodates a secondary battery for driving a vehicle therein, the battery being disposed on a lower side of the seat frame portion with a side facing the seat frame portion as an upper surface side, and fixed to the vehicle body Pack,
A vibration damping material disposed between the seat frame portion and the upper surface of the battery pack while being in contact with the seat frame portion;
An electric vehicle comprising:

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