JP2016137754A - In-vehicle battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce damage to an in-vehicle battery disposed in a recessed part formed in a floor of a vehicle during a collision.SOLUTION: An in-vehicle battery 20 is disposed in a floor recessed part 18 formed in a floor of a vehicle. The in-vehicle battery 20 has a battery pack 22; and a battery frame 24 (30, 32) provided to surround the battery pack 22. A front-frame inclined surface 46 is provided on a front frame 30 of the battery frame 24 so as to face a recessed-part front edge 40 of the floor recessed part 18. During a front collision, the recessed-part front edge 40 contacts the front-frame inclined surface 46, the in-vehicle battery 20 is lifted up, and a force acting on the battery pack 22 is reduced. Furthermore, it is possible to prevent the battery pack 22 from being sandwiched between the recessed-part front edge 40 and a recessed-part rear edge 42. A rear-frame inclined surface 48 is provided on a rear frame 32 so as to face the recessed-part rear edge 42 in response to a rear collision.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an in-vehicle battery mounted on an automobile, and particularly to a mounting structure thereof.

  In an automobile equipped with an electric motor as a vehicle driving motor such as a hybrid automobile, a battery for supplying electric power to the electric motor is mounted. The following Patent Document 1 shows an automobile in which a battery (battery (102)) is mounted in a recess formed in a floor (floor panel (106)) (see FIG. 7). In addition, the code | symbol in () is a code | symbol used by patent document 1, and is not related with the code | symbol used by embodiment of this application.

JP 2011-126439 A

  The battery mounted in the recess of the floor may be pinched by the floor due to the deformation of the floor when the automobile collides, and a large load may be applied.

  An object of this invention is to reduce the load to the battery when a floor deform | transforms.

  The in-vehicle battery according to the present invention is disposed in a recess formed on the floor of an automobile. This in-vehicle battery has a battery pack and a battery frame fixed to the battery pack. The battery frame is positioned between at least a part of the edge of the floor recess and the battery pack. Further, the battery frame has a slope facing the edge of the floor recess, and this slope is inclined so that its lower edge is farther from the edge of the floor recess than the upper edge.

  When the edge of the floor recess comes into contact with the slope of the battery frame during a car collision, an upward force acts on the slope and the in-vehicle battery moves upward. This prevents the in-vehicle battery from being sandwiched between the floors and reduces the load applied to the in-vehicle battery.

It is a side perspective view of a car showing the important section of this embodiment. It is a figure which shows embodiment which has arrange | positioned the vehicle-mounted battery under a backseat. It is a top view of a vehicle-mounted battery simple substance. It is a side view of a vehicle-mounted battery unit. It is a figure which shows embodiment which has arrange | positioned the vehicle-mounted battery under a front seat. It is a figure which shows embodiment corresponding to a side collision.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side perspective view showing a main part of a vehicle 10 provided with an electric motor as a prime mover for driving a vehicle such as a hybrid vehicle from the side. In FIG. 1, the left side is the front side of the automobile 10, and in the subsequent FIGS. 2 to 5, the left side is the front side of the automobile 10. In the following description, terms and directions such as front and rear, right and left, up and down, side, and the like represent directions and directions based on the automobile 10 unless otherwise specified.

  The automobile 10 is a passenger car having a front seat 12 and a rear seat 14. The automobile 10 has a floor 16 that forms a floor portion of the vehicle body. A recess 18 is formed in the floor 16 below the rear seat 14, and a battery 20 is mounted in the recess 18. Hereinafter, the recess 18 is referred to as a floor recess 18, and the battery 20 is referred to as an in-vehicle battery 20. Electric power is supplied from the in-vehicle battery 20 to the electric motor for driving the vehicle, and electric power generated by the electric motor by regenerative braking is charged in the in-vehicle battery 20.

  FIG. 2 is a cross-sectional view showing the configuration of the in-vehicle battery 20 and the surrounding floor 16. 3 and 4 are diagrams showing the in-vehicle battery 20 as a single unit, FIG. 3 is a plan view, and FIG. 4 is a side view. The in-vehicle battery 20 includes a battery pack 22 and a battery frame 24 that is disposed so as to surround the battery pack 22 and fixed. The battery pack 22 includes a battery cell 26 and a battery case 28 that houses the battery cell 26. The general shape of the battery pack 22 is a rectangular parallelepiped, and the battery pack 22 is mounted such that the longitudinal direction is the lateral direction of the automobile 10. The shape of the battery frame 24 is a quadrangular frame shape when viewed from above, and each side of the quadrangle is arranged corresponding to the front, rear, right side, and left side of the battery pack 22, respectively. The battery frame 24 has a substantially isosceles trapezoidal shape. The members constituting the front side of the battery frame 24 are referred to as the front frame 30, the members constituting the rear side are referred to as the rear frame 32, and the members constituting the left and right sides are referred to as the left frame 34 and the right frame 36, respectively. The shape of the battery frame may not be a rectangular frame shape. For example, it is good also as a shape which has the front frame and rear frame which are arrange | positioned corresponding to the front surface of the battery pack 22, and a rear surface, and the beam frame which bridges and connects these front and back frames in parts other than the left and right ends.

  The in-vehicle battery 20 further includes a cooling fan 38 disposed on either the left or right side of the battery pack 22. The cooling fan 38 sends air below the battery cells 26 in the battery pack 22. The sent air passes between the battery cells 26 and escapes upward, and the battery cells 26 are cooled by the air. The air that has escaped above the battery cell 26 is discharged from an exhaust port provided on either the left or right side of the battery pack.

  The floor recess 18 opens upward, and the in-vehicle battery 20 is disposed in the floor recess 18 from this opening. As shown in FIG. 2, a part of the lower side of the in-vehicle battery 20 is accommodated in the floor recess 18. The in-vehicle battery 20 is fixed to the vehicle body by fixing a fastening portion (not shown) provided on the battery frame 24 to the floor 16 using fastening members such as bolts and nuts. The fastening of the battery frame 24 and the floor 16 is released when there is a large input due to a collision or the like, and the deformation of the vehicle body is prevented from being transmitted to the battery frame 24 and the battery pack 22.

  The front frame 30 is disposed at substantially the same height so as to face the front edge 40 of the floor recess 18. Further, the rear frame 32 is disposed at a substantially same height so as to face the rear edge 42 of the floor recess 18. Hereinafter, the front edge 40 and the rear edge 42 are referred to as a concave front edge 40 and a concave rear edge 42, respectively. A cross member 44 of the vehicle body is disposed at the concave rear edge 42.

  The front frame 30 is located between the front surface of the battery pack 22 and the concave front edge 40, and prevents the concave front edge 40 from directly contacting the battery pack 22 when the floor 16 is deformed by the collision of the automobile 10. ing. The front frame 30 is provided at a low position on the front surface of the battery pack 22, particularly corresponding to the lower edge of the front surface. The front frame 30 is provided over the entire left and right direction of the battery pack 22, but may be provided in part. The front frame 30 has a slope 46 that faces the concave front edge 40 in the front-rear direction. Hereinafter, the slope 46 is referred to as a front frame slope 46. The lower edge 46L of the front frame slope 46 is located behind the upper edge 46U. That is, in the front-rear direction, the lower edge 46L is located farther from the concave front edge 40 than the upper edge 46U. The front frame slope 46 may be provided over the entire longitudinal direction of the front frame 30 or may be provided in part.

  The rear frame 32 is located between the rear surface of the battery pack 22 and the recess rear edge 42, and prevents the recess rear edge 42 from directly contacting the battery pack 22 when the floor 16 is deformed by the collision of the automobile 10. ing. The rear frame 32 is positioned substantially at the center or slightly above the center in the vertical direction of the rear surface of the battery pack 22. The rear frame 32 is provided over the entire left and right direction of the battery pack 22, but may be provided in part. The rear frame 32 has a slope 48 that faces the concave rear edge 42 in the front-rear direction. Hereinafter, the slope 48 is referred to as a rear frame slope 48. The lower edge 48L of the rear frame inclined surface 48 is located in front of the upper edge 48U. That is, in the front-rear direction, the lower edge 48L is located farther from the recessed portion rear edge 42 than the upper edge 48U. The rear frame slope 48 may be provided over the entire longitudinal direction of the rear frame 32 or may be provided in part.

  When the automobile 10 collides forward, the front edge 40 of the concave portion moves rearward by an input from the front and comes into contact with the front frame slope 46. The vertical component of the force received by the front frame inclined surface 46 from the concave front edge 40 acts to lift the front end of the in-vehicle battery 20 upward, causing the in-vehicle battery 20 to rotate clockwise in FIG. Thereby, part of the force input to the battery pack 22 from the front can be released, and damage to the battery pack 22 is suppressed. Further, since the front end of the in-vehicle battery 20 comes out of the floor recess 18, the in-vehicle battery 20 is prevented from being sandwiched between the recess front edge 40 and the recess rear edge 42. When the in-vehicle battery 20 is sandwiched between the edges of the floor recess, there is no place for force to escape, and a large force is applied to the battery pack 22. However, by preventing the in-vehicle battery 20 from being sandwiched as described above, such a force is not generated, and damage to the battery pack 22 can be suppressed.

  When the automobile 10 collides backward, the rear edge 42 of the recess moves forward by an input from the rear and comes into contact with the rear frame slope 48. The vertical component of the force received by the rear frame inclined surface 48 from the concave rear edge 42 acts to lift the rear end of the in-vehicle battery 20 upward, causing the in-vehicle battery 20 to rotate counterclockwise in FIG. Thereby, a part of force input to the battery pack 22 from the rear can be released, and damage to the battery pack 22 is suppressed. When the recessed portion rear edge 42 moves further forward, the in-vehicle battery 20 is pushed and moved, and the front frame 30, particularly the front frame inclined surface 46 contacts the recessed portion front edge 40. By this contact, the front end of the in-vehicle battery 20 is lifted upward and comes out of the floor recess 18. Accordingly, the in-vehicle battery 20 is prevented from being sandwiched between the concave front edge 40 and the concave rear edge 42, and no force is generated by the clamping, so that damage to the battery pack 22 can be suppressed.

  The floor recess 18 may be recessed with respect to the entire circumference, or may be recessed with respect to the front and rear portions of the floor recess 18 and open on the left and right. Furthermore, it may be concave only in a specific cross section. In many passenger cars, there is a ridge called a floor tunnel at the foot portion between the left and right rear seats, and a concave shape may be formed only in a longitudinal section including the floor tunnel.

  FIG. 5 is a diagram illustrating an example in which the in-vehicle battery 120 is disposed under the front seat 12. The in-vehicle battery 120 and the surrounding structure in this example are basically the same as those in the example arranged under the rear seat 14, and the corresponding configuration is denoted by reference numeral 100. A floor recess 118 is formed in the floor 116 below the front seat 12, and the in-vehicle battery 120 is disposed in the floor recess 118. A cross member 144 extends in the left-right direction along the front edge of the floor recess 118.

  The in-vehicle battery 120 includes a battery pack 122 and a battery frame 124. The battery frame 124 has a rectangular frame shape, and the front frame 130 and the rear frame 132 appear in FIG. The front frame 130 is in a position facing a front edge 140 (hereinafter referred to as a concave front edge 140) of the floor concave portion 118, and the rear frame 132 is a rear edge 142 (hereinafter referred to as a concave rear edge 142) of the floor concave portion 118. It is in a position opposite to The front frame 130 is provided with a slope 146 (hereinafter referred to as a front frame slope 146) so as to face the front edge 140 of the recess in the front-rear direction. The lower edge of the front frame slope 146 is located behind the upper edge. The rear frame 132 is provided with a slope 148 (hereinafter referred to as a rear frame slope 148) so as to face the front edge 142 of the recess in the front-rear direction. The lower edge of the rear frame slope 148 is located in front of the upper edge. The battery frame may have a shape other than a rectangular frame shape.

  When the automobile 10 collides forward, the front edge 140 of the recess comes into contact with the front frame slope 146 by an input from the front. The front end of the in-vehicle battery 120 is lifted upward by the force received by the front frame slope 146 from the front edge 140 of the recess. Thereby, part of the force input to the battery pack 122 from the front can be released, and damage to the battery pack 122 is suppressed. Further, since the front end of the in-vehicle battery 120 comes out of the floor recess 118, the in-vehicle battery 120 is prevented from being sandwiched between the recess front edge 140 and the recess rear edge 142.

  When the automobile 10 collides rearward, the rear edge 142 of the recess comes into contact with the rear frame slope 148 by an input from the rear. The rear end of the in-vehicle battery 120 is lifted upward by the force received by the rear frame slope 148 from the rear edge 142 of the recess. Thereby, part of the force input to the battery pack 122 from the rear can be released, and damage to the battery pack 122 is suppressed.

  FIG. 6 is a diagram illustrating a configuration example corresponding to a side collision. FIG. 6 is a cross-sectional view seen from the front of the automobile. The basic structure of the in-vehicle battery is basically the same as the example disposed under the rear seat 14 described above, and the corresponding configuration is denoted by reference numeral 200. The floor 216 includes a floor pan 250, a left locker 252, and a right locker 254, and a floor recess 218 is formed in a cross section. The floor pan 250 forms the bottom surface of the floor recess 218, and the left and right rockers 252 and 254 form the side surfaces of the floor recess 218. On-vehicle battery 220 is arranged in floor recess 218.

  The in-vehicle battery 220 includes a battery pack 222 and a battery frame 224. The battery frame 224 has a rectangular frame shape, and a left frame 234 and a right frame 236 appear in FIG. The left frame 234 is at a position facing the left edge 256 of the floor recess 218 (hereinafter referred to as the recess left edge 256). The concave left edge 256 is an upper corner of the left rocker 252. The right frame 236 is at a position facing the right edge 258 of the floor recess 218 (hereinafter referred to as the recess right edge 258). The concave right edge 258 is the upper corner of the right rocker 254. The left frame 234 is provided with a slope 260 (hereinafter referred to as the left frame slope 260) so as to face the left edge 256 of the recess in the left-right direction. The lower edge of the left frame slope 260 is located farther from the concave left edge 256 than the upper edge. The right frame 236 is provided with an inclined surface 262 (hereinafter, referred to as a right frame inclined surface 262) so as to face the concave right edge 258 in the left-right direction. The lower edge of the right frame slope 262 is located farther from the concave right edge 258 than the upper edge. The battery frame may have a shape other than a rectangular frame shape.

  When the automobile 10 collides from the left side, the left edge 256 of the recess comes into contact with the left frame slope 260 by an input from the left side. Due to the force received by the left frame slope 260 from the left edge 256 of the recess, the left end of the in-vehicle battery 220 is lifted upward. Thereby, part of the force input to the battery pack 222 from the left side can be released, and damage to the battery pack 222 is suppressed. Further, since the left end of the in-vehicle battery 220 comes out of the floor recess 218, the in-vehicle battery 220 is prevented from being sandwiched between the recess left edge 256 and the recess right edge 258. In the case of a collision from the right side, it will be a symmetric event and will not be described.

  10 automobiles, 12 front seats, 14 rear seats, 16 floors, 18 floor recesses, 20 in-vehicle batteries, 22 battery packs, 24 battery frames, 30 front frames, 32 rear frames, 34 left frames, 36 right frames, 40 front edges of recesses , 42 Recessed rear edge, 44, 144 Cross member, 46, 146 Front frame slope, 48, 148 Rear frame slope, 250 Floor pan, 252 Left rocker, 254 Right rocker, 256 Recess left edge, 258 Recess right edge, 260 Left Frame slope, 262 Right frame slope.

Claims (1)

An in-vehicle battery disposed in a recess formed on the floor of an automobile,
A battery pack;
A battery frame positioned between at least a part of the edge of the floor recess and the battery pack, and fixed to the battery pack;
Have
The battery frame has an inclined surface facing at least a part of the edge of the floor recess, and the inclined surface is inclined so that the lower edge is located farther from the edge of the floor recess than the upper edge. .

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