JP2018165138A - Automobile vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automobile vehicle that can accurately protect a battery cell in a battery case on the lateral collision, in an automobile vehicle in which a battery case is disposed on a horizontally inside of a side sill part.SOLUTION: An automobile vehicle includes: a pair of side sill parts 30 disposed on right and left sides and having bag-like cross section in front view; a battery case 20 disposed on a horizontally inside of the side sill parts 30; and a dropout mechanism 70 for causing force downward relative to the battery case 20 from the side sill parts 30 when the battery case 20 moves on the horizontally outside and comes into contact with the side sill parts 30, thereby reliably causing the battery case 20 to dropout from a vehicle body side.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an automobile vehicle in which a battery case is disposed on the left and right inner sides of a side sill portion.

  A fuel cell vehicle described in Patent Document 1 is known as an automobile vehicle in which a battery is disposed on the lower side of the vehicle. In this fuel cell vehicle, a battery arranged in a floor tunnel is supported by a subframe. The sub frame is provided between the front and rear sub cross members that support the front and rear ends of the battery on the upper surface and extends in the vehicle width direction, and the intermediate sub that is provided between the front and rear sub cross members and extends in the vehicle width direction. A cross member, and a pair of left and right sub side members extending in the front-rear direction along the side surface of the battery case by connecting the front and rear sub cross members and the intermediate sub cross member. A portion (intermediate beam) extending between the sub-side members has a predetermined space between the lower surface of the battery.

  In this fuel cell vehicle, at the time of a side collision of the vehicle, the side collision load is distributed to the left and right sub side members via the intermediate beam of the intermediate sub cross member, and the left and right sub side members are prevented from being deformed to the battery case side. ing. Even when the intermediate beam of the intermediate sub-cross member is bent, a space is provided between the intermediate beam and the battery case, so that the deformed intermediate beam is less likely to interfere with the front and rear intermediate portions of the battery case. Yes. Further, the intermediate beam of the intermediate sub cross member is joined to the lower surface of the left and right sub side members by joining the upper surfaces of the left and right end portions, so that when a side collision load is input to one of the left and right sub side members, the intermediate beam The beam is deflected to protrude downward, so that the deformed intermediate beam is less likely to interfere with the battery case.

  Moreover, the thing of patent document 2 is known as an in-vehicle structure of the battery case which considered the impact from the high position outside a vehicle. The battery case is disposed on the rear side of the vehicle with respect to the rear seat, and is fixed to the upper side of the support member with screws. The screw insertion hole of the battery case has a first opening formed to be smaller than the screw head, a second opening formed to be larger than the screw head, and the first opening. And a communication portion that communicates with the second opening. When an impact is applied to the battery case from the rear side of the vehicle, the screw position shifts from the first opening to the second opening. Is released from the second opening so that the fixing with the screw is released.

JP 2009-23383 A JP 2007-230329 A

By the way, the technique described in Patent Document 1 prevents the frame from interfering with the battery case at the time of a side collision on the left and right center side of the vehicle such as the vicinity of the floor tunnel. Therefore, the technique described in Patent Document 1 is applied to a vehicle in which the vehicle body and the battery case are likely to interfere during a side collision, such as an automobile vehicle in which the battery case is disposed inside the side sill portion positioned on the left and right outer sides of the vehicle. Difficult to do.
Patent Document 2 does not disclose battery protection when the vehicle body and the battery case interfere with each other.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a battery cell in a battery case in a side collision or the like in an automobile vehicle in which a battery case is disposed on the left and right inner sides of a side sill portion. An object of the present invention is to provide an automobile vehicle capable of accurately protecting the vehicle.

  In order to achieve the above object, according to the present invention, a pair of left and right side sill portions having a bag-like cross section in a front view, a battery case disposed inside the left and right sides of the side sill portion, and the battery case There is provided an automobile vehicle including a drop-off mechanism that generates a downward force from the side sill portion to the battery case when it moves to the left and right outside and contacts the side sill portion.

  According to this automobile vehicle, when the battery case moves left and right and contacts the side sill part at the time of a side collision of the automobile vehicle, a downward force is applied from the side sill part to the battery case by the dropping mechanism. It is done. As a result, the battery case moves downward while moving left and right outside and falls off the vehicle body side.

  In the above-described automobile vehicle, the drop-off mechanism may include a vehicle body side guide surface that is formed on the outer surface of the left and right inner walls of the side sill portion and is inclined downward toward the left and right outer sides. Here, the vehicle body side guide surface may be planar or curved.

  According to this automobile vehicle, when the battery case moves to the left and right outsides at the time of a side collision of the automobile vehicle, it contacts the vehicle body side guide surface of the side sill portion. At this time, a reaction force in a direction perpendicular to the vehicle body side guide surface is applied to the battery case from the side sill portion. Since this reaction force is composed of a component force inward in the left-right direction and a component force in the downward direction, a downward force is applied to the battery case.

  In the above automobile vehicle, the drop-off mechanism may include a battery side guide surface formed on the outer surface of the left and right outer walls of the battery case and inclined downward toward the left and right outer sides. Here, the battery side guide surface may be flat or curved.

  According to this automobile vehicle, when the battery case moves to the left and right outsides at the time of a side collision of the automobile vehicle, the battery side guide surface of the battery case comes into contact with the side sill portion. At this time, a reaction force in a direction perpendicular to the battery side guide surface is applied to the battery case from the side sill portion. Since this reaction force is composed of a component force inward in the left-right direction and a component force in the downward direction, a downward force is applied to the battery case.

  In the automobile vehicle, the battery support plate to which the battery case is fixed, a fastening portion that fastens the battery support plate and the side sill portion, and the battery support plate and And a release mechanism for releasing the fastening of the side sill portion.

  According to this automobile vehicle, when the battery support plate moves to the left and right outside together with the battery case in the case of a side collision of the automobile vehicle, the fastening of the battery support plate and the side sill portion is released by the release mechanism. Thereby, the battery support plate is detached from the vehicle body side together with the battery case.

  In the automobile vehicle, the fastening portion includes a first hole formed in the battery support plate, a second hole formed in the side sill portion, a bolt that passes through the first hole and the second hole, A nut that engages with the bolt, and the first hole corresponds to a predetermined fixing position and has a first circular portion having a smaller diameter than a seat surface of the bolt or the nut, and the first circular portion. You may have a 2nd circular part continuously formed with the right-and-left inner side and larger diameter than the seat of the said bolt or the said nut.

  According to this automobile vehicle, when the battery support plate moves to the left and right outside together with the battery case at the time of a side collision of the automobile vehicle, the shaft of the bolt is relatively moved from the first circular portion to the second circular portion in the first hole. Move to. When the seat surface of the bolt or nut reaches the second circular portion, the seat surface of the bolt or nut can be inserted through the second circular portion, and the fastening of the battery support plate by the bolt and nut is released.

  In the automobile vehicle, the fastening portion includes a first hole formed in the battery support plate, a second hole formed in the side sill portion, a bolt that passes through the first hole and the second hole, The battery support plate may include an open portion that is formed near the left and right inner sides of the first hole and is larger than the seat surface of the bolt or nut.

  According to this automobile vehicle, when the battery support plate moves to the left and right outside together with the battery case, for example, at the time of a side collision of the automobile vehicle, the shaft of the bolt comes into contact with the left and right peripheral edge portions in the first hole. Here, since the open part is formed in the battery support plate near the left and right inner sides of the first hole, the left and right inner peripheral parts of the first hole are relatively fragile. Thus, the bolt shaft deforms the peripheral portion of the first hole of the battery support plate to reach the open portion, and the fastening of the battery support plate by the bolt and nut is released.

  In the automobile vehicle, the fastening portion includes a first hole formed in the battery support plate, a second hole formed in the side sill portion, a bolt that passes through the first hole and the second hole, A nut that engages with the bolt, and a portion of the battery support plate where the first hole is formed may be thinner on the left and right inner sides than on the left and right outer sides of the first hole.

  According to this automobile vehicle, when the battery support plate moves to the left and right outside together with the battery case, for example, at the time of a side collision of the automobile vehicle, the shaft of the bolt comes into contact with the left and right peripheral edge portions in the first hole. At this time, since the peripheral portions on the left and right inner sides of the first hole are thin, the battery support plate is easily deformed, and stress in the shearing direction is concentrated on the bolt. As a result, the battery support plate is deformed to expand the first hole so that the seat surface of the bolt or nut can be inserted through the first hole, or by cutting the bolt shaft, the battery using the bolt and nut The fastening of the support plate is released.

  According to the present invention, the battery case can be reliably detached from the vehicle body side at the time of a side collision of the vehicle, and as a result, the battery cells in the battery case can be protected accurately. In addition, a space for moving the battery case at the time of a side collision or the like can be secured, and the mounting space for the battery case can be increased.

1 is a schematic external view of an automobile vehicle showing an embodiment of the present invention. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. FIG. 4 is a partially enlarged view of FIG. 3. It is explanatory drawing which shows the state which the battery case moved to the right or left one from the state of FIG. It is explanatory drawing which shows the state which the battery case moved to the right or left one from the state of FIG. It is a partial bottom view of the battery support plate which shows a modification. It is a partial bottom view of the battery support plate which shows a modification. It is a partial enlarged view of the battery support plate which shows a modification, (a) is the state before a side collision, (b) shows the state at the time of a side collision. It is a partial bottom view of the battery support plate which shows a modification. It is CC sectional drawing of FIG. 10 which shows a modification. It is CC sectional drawing of FIG. 10 which shows a modification.

  1 to 6 show an embodiment of the present invention. FIG. 1 is a schematic external view of an automobile, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB in FIG. 4 is a partially enlarged view of FIG. 3, FIG. 5 is an explanatory view showing a state where the battery case is moved to the left and right from the state of FIG. 2, and FIG. 6 is a view showing the state of FIG. It is explanatory drawing which shows the state which carried out.

  As shown in FIG. 1, this automobile vehicle 10 has a motor as a drive source of wheels, and as shown in FIG. 2, a plurality of battery cells BT for supplying electric power to the motor are mounted. Each battery cell BT is stored in a state of being aligned in a box-shaped battery case 20. The material of the battery case 20 is arbitrary, but is made of a material having relatively high rigidity such as metal or reinforced plastic.

  The automobile vehicle 10 has a vehicle body in which panel-like members obtained by press-molding steel plates, for example, are assembled and joined by spot welding or the like. The vehicle body includes a side sill portion 30 that is arranged in a pair on the left and right sides and has a bag-like cross section in front view, and a floor panel 40 that forms a lower part of the passenger compartment and is connected to each side sill portion 30. The specific configuration of the side sill portion 30 is arbitrary. For example, the side sill portion 30 includes an outer panel disposed on the outer side in the left-right direction and an inner panel disposed on the inner side in the left-right direction and forming a bag-like cross section together with the outer panel.

  In addition, the automobile vehicle 10 includes a battery support plate 50 that is disposed below the floor panel 40 and connected to each side sill portion 30. The battery case 20 is disposed in a space defined by the side sill portions 30, the floor panel 40, and the battery support plate 50. The battery case 20 is fixed to the battery support plate 50. The material of the battery support plate 50 is arbitrary, but is made of a material having relatively high rigidity such as metal or reinforced plastic. In the present embodiment, the floor panel 40 is connected to the upper side of each side sill portion 30, and the battery support plate 50 is connected to the lower side of each side sill portion 30. As a result, the side sill portions 30 and the battery case 20 are arranged side by side at substantially the same height. If the floor panel 40 and the battery support plate 50 are separated in the vertical direction to define a space in which the battery case 20 can be accommodated, the position connected to the side sill portion 30 can be arbitrarily changed. The floor panel 40 and each side sill portion 30 are connected by, for example, welding, and the battery support plate 50 and each side sill portion 30 are connected by a fastening portion 60. In the present embodiment, the side sill portion 30 and the battery support portion are formed in a state where the lower surface of the side sill portion 30 is formed horizontally and flatly and the left and right outer end sides of the flat battery support plate 50 are superimposed on the lower surface of the side sill portion 30. 50 is fastened.

  The fastening portion 60 includes a first hole 51 formed in the battery support plate 50, a second hole 32 formed in the side sill portion 30, a bolt 61 that passes through the first hole 51 and the second hole 32, and a bolt 61. And a nut 62 to be screwed together. In the present embodiment, the nut 62 is disposed inside the side sill portion 30, and the head of the bolt 61 contacts the battery support plate 50.

  The automobile vehicle 10 includes a drop-off mechanism 70 that generates a downward force from the side sill portion 30 to the battery case 20 when the battery case 20 moves left and right and contacts the side sill portion 30. In the present embodiment, the drop-off mechanism 70 is formed on the outer surface of the left and right inner walls 31 of the side sill portion 30, and is provided on the outer surface of the left and right outer walls 21 of the battery case 20 and the vehicle body side guide surface 71 tilted downward toward the left and right outer sides. And a battery-side guide surface 72 that is formed and tilts downward toward the left and right outer sides. The vehicle body side guide surface 71 and the battery side guide surface 72 are each formed in a planar shape, and the angle formed with respect to the vertical direction is constant from top to bottom. In the present embodiment, the vehicle body-side guide surface 71 and the battery-side guide surface 72 are inclined at the same angle with respect to the vertical direction, and the mutual distance in the left-right direction is the same up and down. The angle formed by the vehicle body side guide surface 71 and the battery side guide surface 72 with respect to the vertical direction is preferably 45 ° or less, and more preferably 15 ° or more and 30 ° or less.

  The automobile vehicle 10 includes a release mechanism that releases the fastening of the battery support plate 50 and the side sill portion 30 when the battery support plate 50 moves left and right. In the present embodiment, the first hole 51 of the battery support plate 50 is formed in a special shape to form a release mechanism.

  That is, as shown in FIG. 3, the first hole 51 of the battery support plate 50 corresponds to an intended fixing position and has a first circular portion 52 having a smaller diameter than the seating surface of the bolt 61 and the left and right sides of the first circular portion 52. A second circular portion 53 formed continuously with the inner side and having a larger diameter than the seating surface of the bolt 61. In the present embodiment, as shown in FIG. 4, the first circular portion 52 and the second circular portion 53 are formed so as to partially overlap each other, and the first hole 51 as a whole has a daruma shape in plan view. . The second hole 32 of the side sill portion 30 has a circular shape in plan view. Further, the dimension in the front-rear direction of the connecting portion between the first circular portion 52 and the second circular portion 53 in the first hole 51 is set to be smaller than the diameter of the shaft of the bolt 61.

  In the automobile vehicle 10 configured as described above, one side sill portion 30 in the left-right direction is pushed by a collision object or the like and moves to the other in the left-right direction and contacts the battery case 20 at the time of a side collision. Specifically, the vehicle body side guide surface 71 of one side sill portion 30 in the left-right direction and the battery side guide surface 72 of the battery case 20 are in contact with each other. Thereafter, as shown in FIG. 5, the battery case 20 is pushed by one side sill portion 30 in the left-right direction and moves to the other in the left-right direction.

  When the battery case 20 moves to the other side in the left-right direction and comes into contact with the other side sill portion 30 in the left-right direction, a downward force is applied to the battery case 20 from the other side sill portion 30 in the left-right direction. It is done. Specifically, when the battery case 20 moves to the other in the left-right direction, the battery-side guide surface 72 of the battery case 20 and the vehicle-body-side guide surface 71 of the other side sill portion 30 in the left-right direction come into contact. At this time, a reaction force in a direction perpendicular to the vehicle body side guide surface 71 and the battery side guide surface 72 is applied to the battery case 20 from the side sill portion 30. Since this reaction force is composed of a component force inward in the left-right direction and a component force in the downward direction, a downward force is applied to the battery case 20. Thereby, the other end side of the battery case 20 moves downward while moving to the other side in the left-right direction, and falls off from the vehicle body side. Here, only the other end in the left-right direction of the battery case 20 falls off, and one end in the left-right direction does not fall off from the vehicle body side.

  In addition, according to the automobile vehicle 10 of the present embodiment, when the battery support plate 50 moves to the other side in the left-right direction together with the battery case 20, as shown in FIG. The fastening of the plate 50 and the side sill portion 30 is released. Specifically, when the battery support plate 50 moves in the left-right direction together with the battery case 20, the shaft of the bolt 61 moves relatively from the first circular portion 52 to the second circular portion 53 in the first hole 51. At this time, the axis of the bolt 61 is in contact with the left and right inner peripheral edges of the first circular portion 52, and the left and right inner sides of the first circular portion 52 are relatively fragile, so the battery support plate 50 is easily deformed. Accordingly, the shaft of the bolt 61 can be smoothly moved to the second circular portion 53 by deforming the battery support plate 50 and expanding the first hole 51. When the seat surface of the bolt 61 reaches the second circular portion 53, the seat surface of the bolt 61 can be inserted through the second circular portion 53, and the fastening of the battery support plate 50 by the bolt 61 and the nut 62 is released. The Here, the fastening is released only at the other end in the left-right direction of the battery support plate 50, and the fastening at the one end in the left-right direction is not released.

  Thus, according to the automobile vehicle 10 of the present embodiment, the battery case 20 can be reliably detached from the vehicle body side at the time of a side collision or the like, and as a result, the battery cells BT in the battery case 20 can be accurately obtained. Can be protected. In addition, a space for moving the battery case 20 at the time of a side collision or the like can be secured, and the mounting space for the battery case 20 can be increased. In particular, in the present embodiment, the left and right other end side of the battery case 20 is dropped to protect the battery cell BT, while the one end side in the left and right direction can receive a load at the time of a side collision with the vehicle body. Very advantageous.

  In the embodiment, the drop-off mechanism 70 has both the vehicle body side guide surface 71 and the battery side guide surface 72, but either one of the guide surfaces may be used. Further, these guide surfaces may be flat or curved. Furthermore, these guide surfaces do not need to be formed entirely on the wall of the battery case and / or the side sill, and at least contact between the side sill and the battery case when the battery case moves outward in the left-right direction. What is necessary is just to be formed in the part. Furthermore, for example, the strength of the contact portion of the vehicle body side guide surface and / or the battery side guide surface may be improved over other portions by forming a convex portion or changing the material.

  Moreover, in the said embodiment, although the 1st hole 51 of the battery support plate 50 showed what has a daruma shape by planar view as a whole, as shown, for example in FIG. 7, the 1st circular part 52 and 2nd The circular portion 53 may be formed so as not to partially overlap but to be separated via a passage 54 that connects the two. Further, as shown in FIG. 8, for example, the first circular portion 52 and the second circular portion 53 are independently formed in a relatively close state, and the peripheral portions on the left and right inner sides of the first circular portion 52 are relatively weak. As an alternative, the movement of the shaft of the bolt 61 to the left and right inward may be allowed at the time of a side collision. In this case, it can be said that the first circular portion 52 forms the main body of the first hole, and the second circular portion 53 is formed in the vicinity of the left and right inner sides of the main body of the first hole and is an open portion larger than the seat surface of the bolt or nut.

  Furthermore, for example, as shown in FIG. 9A, the first hole 151 is a circular hole, and the first hole 151 is relatively close to the opening 152 such as the end of the battery support plate 150 or the notch. Also good. Since the open part 152 is formed in the battery support plate 150 in the vicinity of the left and right inner sides of the first hole 151, the left and right inner peripheral parts of the first hole 151 are relatively fragile. Even in this configuration, as shown in FIG. 9B, when the battery support plate 150 moves left and right together with the battery case 20, the shaft of the bolt 61 deforms the peripheral portion of the first hole 151 of the battery support plate 150. The battery support plate 150 by the bolt 61 is released.

  Furthermore, for example, as shown in FIG. 10, the first hole 251 is a circular hole, and a portion where the first hole 251 is formed in the battery support plate 250 is formed so that the left and right inner sides are thinner than the left and right outer sides of the first hole 251. You may make it do. In this case, at the time of a side collision of the automobile vehicle 10, the battery support plate 250 is deformed to expand the first hole 251 so that the seat surface of the bolt 61 can be inserted through the first hole 251, or the bolt 61 By cutting the shaft, the fastening of the battery support plate 250 by the bolt 61 and the nut 62 is released. Here, the cross-sectional shape of the formation portion of the first hole 251 can be arbitrarily changed. For example, as shown in FIG. 11, the left and right inner periphery of the first hole 251 is constant upward in the left and right inner direction. It can be inclined at an angle. For example, as shown in FIG. 12, the left and right inner periphery of the first hole 251 may extend in the vertical direction on the lower side and incline toward the left and right inner side in the upper direction. In the example of FIG. 12, the upper side of the left and right inner periphery of the first hole 251 forms a curved surface that is concave upward. Although it is preferable to provide a release mechanism for releasing the fastening of the battery support plate and the side sill portion, it is not always necessary to provide a release mechanism if the fastening is released by the downward force generated in the battery case 20 by the drop-off mechanism. .

  Moreover, in the said embodiment, although the one battery case 20 showed what is arrange | positioned inside each side sill part 30, the some battery case may be arranged in the left-right direction. In this case, the battery case adjacent to each side sill part may include a drop-off mechanism that generates a downward force from the side sill part to the battery case when it moves to the left and right outside and contacts the side sill part.

  Although the embodiment of the present invention has been described above, the drop-off mechanism is not limited to the guide surface and can be arbitrarily changed, and the embodiment described above does not limit the invention according to the claims. Absent. In addition, it should be noted that not all the combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

DESCRIPTION OF SYMBOLS 10 Automobile vehicle 20 Battery case 21 Left and right outer wall 30 Side sill part 31 Left and right inner wall 32 2nd hole 50 Battery support plate 51 1st hole 52 1st circular part 53 2nd circular part 60 Fastening part 61 Bolt 62 Nut 70 Dropping mechanism 71 Car body side Guide surface 72 Battery side guide surface 150 Battery support plate 151 1st hole 152 Opening part 250 Battery support plate 251 1st hole

Claims (7)

A side sill portion arranged in a pair of left and right and having a bag-like cross section in front view;
A battery case disposed inside the left and right sides of the side sill,
An automobile vehicle comprising: a drop-off mechanism that generates a downward force from the side sill portion to the battery case when the battery case moves left and right and contacts the side sill portion.   2. The automobile vehicle according to claim 1, wherein the drop-off mechanism has a vehicle body side guide surface formed on an outer surface of a left and right inner wall of the side sill portion and inclined downward toward the left and right outer sides.   The automobile vehicle according to claim 1, wherein the drop-off mechanism has a battery-side guide surface formed on an outer surface of a left and right outer wall of the battery case and inclined downward toward the left and right outer sides. A battery support plate to which the battery case is fixed;
A fastening part for fastening the battery support plate and the side sill part;
The automobile vehicle according to any one of claims 1 to 3, further comprising: a release mechanism that releases fastening of the battery support plate and the side sill portion when the battery support plate moves to the left and right outside. The fastening portion includes a first hole formed in the battery support plate, a second hole formed in the side sill portion, a bolt that passes through the first hole and the second hole, and a screw engagement with the bolt. And a nut to
The first hole is formed continuously with a first circular portion having a smaller diameter than a seat surface of the bolt or the nut corresponding to a predetermined fixing position, and the left and right inner sides of the first circular portion, and the bolt or the nut. The automobile vehicle according to claim 4, further comprising a second circular portion having a diameter larger than that of the seating surface. The fastening portion includes a first hole formed in the battery support plate, a second hole formed in the side sill portion, a bolt that passes through the first hole and the second hole, and a screw engagement with the bolt. And a nut to
5. The automobile vehicle according to claim 4, wherein the battery support plate has an open portion that is formed in the vicinity of the left and right inner sides of the first hole and is larger than a seat surface of the bolt or nut. The fastening portion includes a first hole formed in the battery support plate, a second hole formed in the side sill portion, a bolt that passes through the first hole and the second hole, and a screw engagement with the bolt. And a nut to
5. The automobile vehicle according to claim 4, wherein a portion where the first hole is formed in the battery support plate is formed to have a thinner left and right inner side than a left and right outer side of the first hole.

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