JP6935776B2 - Holding structure of power storage device - Google Patents

Description

The present specification discloses a holding structure of a power storage device for fixing and holding a power storage device mounted on a vehicle in a state of being housed in a carrier.

As a holding structure for a power storage device mounted on a vehicle, a structure is known in which the power storage device is placed on a member called a carrier, and the power storage device is pressed and fixed to the carrier by a clamp fastened to the carrier. ing.

For example, in Patent Document 1, a clamp having a carrier on which a battery (power storage device) having a collar is placed at a lower end, a carrier contact portion fastened to the carrier, and a battery contact portion that contacts the collar. A battery holder with and is disclosed. In this battery holder, the clamp further has a protrusion extending upwardly. This protrusion increases the force with which the battery contact part presses the collar (battery) against the carrier when another component placed adjacent to the battery hits in the event of a collision that deforms the engine room. It is provided in various shapes and positions.

By using such a battery holder, it is possible to effectively prevent the power storage device from being separated from the carrier even in a collision in which the engine room is deformed, specifically, in the case of a front collision or a side collision.

Japanese Unexamined Patent Publication No. 2016-137853

However, in the technique of Patent Document 1, it is possible to prevent the power storage device from being separated from the carrier at the time of a collision in which the engine room is deformed, that is, at the time of a vehicle front collision or a vehicle side collision. The withdrawal could not be prevented. That is, in the conventional holding structure, when the front end of the power storage device is lifted upward at the time of a rear collision of the vehicle, the contact relationship between the power storage device and the clamp is released, and the power storage device may be separated from the carrier.

Therefore, this specification discloses a holding structure of the power storage device that can prevent the power storage device from being separated from the carrier at the time of a vehicle rear collision.

The holding structure of the power storage device disclosed in the present specification is a power storage device mounted on the vehicle, the power storage device mounted on the vehicle so that the front surface thereof is substantially parallel to the vehicle width direction, and the power storage device. The power storage device includes a carrier having a storage recess for accommodating at least a lower portion thereof, and a clamp for fixing the power storage device to the carrier. A lateral projecting portion that projects laterally outward is provided at the lower portion, respectively, and the clamp hits the front contact portion that abuts on the upper surface of the front projecting portion and the upper surface of the lateral projecting portion. The side contact portion that comes into contact, the front standing wall portion that rises from the rear end of the front contact portion so as to approach or contact the front end surface of the power storage device, and the fastening that is located one side outside the front standing wall portion. At the position, the clamp is provided with a fastening portion to be fastened to the carrier, and the clamp is rotatable about the fastening position in a horizontal plane.

In this case, when the lower end of the front end of the power storage device rises above the upper end of the front contact portion due to the rear collision of the vehicle, the front lower end of the power storage device contacts the front standing wall portion and pushes the front standing wall portion forward. .. As a result, the clamp rotates in the horizontal plane with the fastening position with the carrier as the center in the direction in which the front standing wall portion faces forward, and in turn, in the direction in which the side contact portion approaches the power storage device. As a result, the contact relationship between the side contact portion and the side protrusion portion is maintained, and the power storage device can be effectively prevented from being separated from the carrier.

In this case, both the upper surface of the lateral protrusion and the lateral contact portion may be inclined so as to be lowered toward the laterally outward side.

With such a configuration, when the side contact portion moves in the direction approaching the power storage device due to the rotation of the clamp, the side contact portion pushes the side protrusion portion in the vehicle width direction. The part is converted into a downward force. Then, the downward force suppresses the lifting of the power storage device, and the detachment of the power storage device from the carrier can be prevented more effectively.

Further, the front wall portion may be provided at a position separated from the front and one side corner portion of the battery to the other side side.

With such a configuration, the installable range of the fastening position between the clamp and the carrier is widened, so that the degree of freedom in design is improved.

According to the holding structure of the power storage device disclosed in the present specification, it is possible to more effectively prevent the battery from being detached from the carrier at the time of a vehicle rear collision.

It is a top view of the holding structure of a battery. It is a front view of the holding structure of a battery. FIG. 1 is a cross-sectional view taken along the line AA of FIG. FIG. 1 is a cross-sectional view taken along the line BB of FIG. It is a cross-sectional view of BB at the time of a vehicle rear collision. It is an image figure which shows the state of the left side protrusion part and the side contact part at the time of a rear collision of a vehicle. It is sectional drawing which shows the state at the time of a vehicle rear collision in the prior art.

Hereinafter, the holding structure of the battery 10 will be described with reference to the drawings. FIG. 1 is a plan view of the holding structure of the battery 10, and FIG. 2 is a front view. 3 and 4 are a cross-sectional view taken along the line AA and a cross-sectional view taken along the line BB in FIG. 1, respectively. In FIG. 2, the carrier 12 is partially broken so that the front surface of the battery 10 and the clamp 14 can be seen. Further, in the following drawings, "Fr", "Up", and "Rh" indicate the front, upper, and right sides of the vehicle, respectively. Here, the front, rear, left, and right of the vehicle mean the front, back, left, and right as seen from the driver.

The holding structure of the battery 10 is mounted on an electric vehicle (for example, a hybrid vehicle, an electric vehicle, or the like) equipped with a motor driven by electric power as one of the traveling power sources. The holding structure of the battery 10 is usually arranged in a space other than the passenger compartment space of the vehicle, for example, a power unit room (also referred to as an engine room), a lower side of a seat, or the like. After being placed on the carrier 12, the battery 10 is fixed to the carrier 12 by the clamp 14. Further, the carrier 12 is fastened to another member of the vehicle (for example, a vehicle body, a skeleton member, etc.).

The battery 10 is a power storage device that stores electric power supplied to the traveling motor. The battery 10 is a secondary battery that has a relatively high voltage and can be discharged and charged. The battery 10 has a substantially rectangular parallelepiped shape that is long in the vehicle width direction. The battery 10 is fixed to the carrier 12 in a posture in which the front surface (long direction) thereof is substantially parallel to the vehicle width direction.

The lower portion of the battery 10 is provided with protrusions 18f, 18l, 18r, 18b that project outward. The protrusions 18f, 18l, 18r, and 18b are provided on all four surfaces of the battery 10. In the following, the projecting portion protruding from the front surface of the battery 10 is the "front projecting portion 18f", the projecting portion projecting from the rear surface is the "rear projecting portion 18b", and the projecting portion projecting from the right side surface is the "right side projecting portion 18r". The protruding portion protruding from the left side surface is referred to as a "left side protruding portion 18l". When the front, back, left, and right are not distinguished, it is simply referred to as a "protruding portion 18". The upper surface of each of the projecting portions 18 is an inclined surface that becomes lower toward the outside in the horizontal direction.

The carrier 12 is a member on which the battery 10 is placed, and is a substantially dish having a storage recess 20 in which a part of the battery 10 is housed and a flange 28 extending horizontally from the peripheral edge of the storage recess 20. It is a shaped member. The carrier 12 is made of resin or the like, and is molded by injection molding, for example. The carrier 12 is fixed to the vehicle body or the like by means such as screwing. In FIG. 1, the cross mark circled indicates the fastening position 30 between the carrier 12 and the vehicle body or the like. As is clear from FIG. 1, in this example, the carrier 12 is fastened to the vehicle body or the like at two locations on the bottom surface of the accommodating recess 20 and one location on the flange 28, for a total of three locations.

The accommodating recess 20 has a substantially rectangular shape that is long in the vehicle width direction in a plan view, and the planar dimension of the accommodating recess 20 is sufficiently larger than the planar dimension of the battery 10. Therefore, when the battery 10 is placed inside the accommodating recess 20, a certain amount of space is formed on the left, right, front, and rear of the battery 10, and the battery 10 is placed in the accommodating recess 20 before being fixed by the clamp 14. Can slide in the left-right and front-back directions.

As is clear from FIGS. 3 and 4, of the accommodating recesses 20, the rear end surface and the right end surface are formed with return portions 22 protruding inward in the horizontal direction. The bottom surface of the return portion 22 is an inclined surface that becomes lower toward the outside in the horizontal direction, and the inclination angle and height thereof are substantially the same as the inclination angle and height of the upper surfaces of the rear protrusion 18b and the right side protrusion 18r. ing. Therefore, when the battery 10 is slid until the rear end surface and the right end surface of the battery 10 come into contact with the rear end surface and the right end surface of the accommodating recess 20, the return portion 22 is the upper surface of the rear protrusion 18b and the right side protrusion 18r. Will be covered. As a result, the rear and right sides of the battery 10 are prevented from rising.

The clamp 14 is a member that presses and fixes one corner of the battery 10, in this example, the left front corner of the battery 10 against the bottom surface 26 of the carrier 12. As shown in FIG. 1, the clamp 14 has a substantially L-shape along the corner of the battery 10 in a plan view.

More specifically, the clamp 14 is roughly classified into a front contact portion 36, a side contact portion 34, a fastening portion 38, a front standing wall portion 40, and a leg portion 42. As shown in FIG. 4, the front contact portion 36 is a portion that contacts the upper surface of the front protrusion 18f from above. The front contact portion 36 is inclined so as to be lowered toward the front, and the inclination angle and height thereof are substantially the same as the inclination angle and height of the upper surface of the front protrusion 18f. The leg portion 42 extends downward from the front end of the front contact portion 36. Further, the front standing wall portion 40 extends upward from the rear end (upper end) of the front contact portion 36. Further, a side contact portion 34 is connected to the left end of the front contact portion 36 at an angle of approximately 90 degrees.

As shown in FIG. 3, the side contact portion 34 is a portion that contacts the upper surface of the left side protrusion 18l from above. The lateral contact portion 34 is inclined so as to become lower toward the left side, and the inclination angle and height thereof are substantially the same as the inclination angle and height of the upper surface of the left side protrusion 18l. A fastening portion 38 extends from the left end of the side contact portion 34.

The fastening portion 38 is a portion extending in a direction parallel to the bottom surface 26 of the carrier 12, that is, in the horizontal direction. The leg portion 42 extends downward from the left end portion of the fastening portion 38. Further, the fastening portion 38 is formed with one fastening hole 32 (see FIG. 1) through which the fastening bolt 44 is inserted. The fastening portion 38 and the bottom surface 26 of the carrier 12 are fastened together with the fastening bolt 44 and the nut screwed to the fastening bolt 44, so that the fastening portion 38 and thus the clamp 14 are fixed to the carrier 12. ..

Here, as is clear from FIG. 1, in this example, there is only one fastening hole 32. Therefore, when a horizontal force exceeding the frictional force between the head of the fastening bolt 44 and the upper surface of the fastening portion 38 is applied, the clamp 14 is centered on the fastening hole 32 (fastening position with the carrier 12). Can rotate in a horizontal plane. However, in the normal state where the battery 10 does not float, the rotation of the clamp 14 is restricted by the contact relationship with the front surface and the left side surface of the battery 10.

As shown in FIGS. 2 and 4, the front standing wall portion 40 is a portion extending upward from the upper end (rear end) of the front contact portion 36, and is a portion that approaches or abuts on the front end surface of the battery 10. The lower end of the front end of the battery 10 that is lifted at the time of the rear collision of the vehicle comes into contact with the front contact portion 36.

Here, the fastening hole 32 described above is provided at a position on the left side of the battery 10. By providing the clamp 14 at such a position, when the clamp 14 rotates about the fastening hole 32 (the fastening position with the carrier 12), one of the front standing wall portion 40 and the side contact portion 34 is separated from the battery 10, and the other is the battery. The behavior of approaching 10 is established. That is, when the clamp 14 rotates in the clockwise direction (Rc direction in FIG. 1) around the fastening hole 32, the side contact portion 34 is separated from the battery 10, and the front contact portion 36 and the front standing wall portion are separated. 40 will be closer to the battery 10. On the contrary, when the clamp 14 rotates in the counterclockwise direction (Ra direction in FIG. 1) around the fastening hole 32, the side contact portion 34 approaches the battery 10 and the front contact portion 36 And the front wall 40 will be separated from the battery 10. As a result, the floating of the battery 10 at the time of a rear collision of the vehicle can be suppressed, which will be described later.

The fastening hole 32 is provided at another position as long as the directions of the front standing wall portion 40 and the side contact portion 34 approaching / diverging from the battery 10 are reversed when the clamp 14 is rotated. You may. Specifically, the fastening hole 32 may be provided on the left side of the front standing wall portion 40, and may be located on the right side of the left front corner of the battery 10. In this example, the front wall portion 40 is provided at a position slightly to the right of the left end of the battery 10. With such a configuration, the installable range of the fastening hole 32 can be expanded and the degree of freedom in design can be improved as compared with the configuration in which the front standing wall portion 40 is extended to the left end of the battery 10.

Next, the procedure for assembling the battery 10 in the holding structure of the battery 10 will be described. When assembling the battery 10 to the vehicle, first, the carrier 12 is fastened to the vehicle. That is, the three fastening positions 30 of the carrier 12 are screwed and fastened to the vehicle body or the like. Subsequently, the battery 10 is placed inside the accommodating recess 20 of the carrier 12. At this time, the battery 10 is placed at a position slightly separated from the rear end surface and the right end surface of the accommodating recess 20 so that the rear end and the right end of the battery 10 do not interfere with the return portion 22 of the carrier 12.

When the battery 10 is placed in the accommodating recess 20 of the carrier 12, the battery 10 is subsequently pushed backward and to the right to accommodate the rear end surface of the battery 10 in the accommodating recess 20 and accommodating the right end surface of the battery 10. It is brought into contact with the right end surface of the recess 20. As a result, the return portion 22 of the carrier 12 covers the rear protruding portion 18b and the right side protruding portion 18r of the battery 10, so that the rear portion and the right side portion of the battery 10 are prevented from being lifted.

Subsequently, the left front corner of the battery 10 is pressed and fixed by the clamp 14. Specifically, the front contact portion 36 of the clamp 14 is located on the front protrusion 18f of the battery 10, and the side contact portion 34 of the clamp 14 is located on the left protrusion 18l of the battery 10. , The clamp 14 is arranged, and the clamp 14 is fastened to the carrier 12 with the fastening bolt 44. This prevents the front and left sides of the battery 10 from rising. Further, since the sliding movement of the battery 10 is also restricted by the clamp 14, the battery 10 is fixed at a fixed position in the accommodating recess 20. Then, in this state, the assembly of the battery 10 is completed.

Here, as is clear from the above description, the floating of the battery 10 is originally prevented by the contact portions 34 and 36 of the return portion 22 and the clamp 14. However, when a large force is applied to the carrier 12 and the battery 10 in the forward direction of the vehicle, for example, when a colliding body collides with the rear portion of the vehicle, the front portion of the battery 10 may be lifted. In the conventional technique, the fixing of the battery 10 by the clamp 14 is released due to this floating, and the battery 10 may be separated from the carrier 12. In this example, the clamp 14 is provided with a front wall portion 40 in order to prevent the battery 10 from coming off due to the lifting of the front portion of the battery 10. The operation of the front wall portion 40 will be described in comparison with the prior art.

FIG. 5 is a cross-sectional view taken along the line BB at the time of a rear collision of the vehicle. Further, FIG. 7 is a cross-sectional view showing a state at the time of a vehicle rear collision in the prior art. In the conventional clamp 14 shown in FIG. 7, there is no front standing wall portion 40, and the upper end of the front contact portion 36 is the upper end of the front portion of the clamp 14. In other words, in the conventional clamp 14, the height of the upper end Ft of the front portion thereof is relatively low.

The behavior when a vehicle rear collision occurs in the conventional structure shown in FIG. 7 will be described. At the time of a vehicle rear collision, a large collision load facing the vehicle forward is input to the rear end of the battery 10 via the carrier 12. In response to this collision load, the battery 10 may swing in a vertical plane so that its front end is lifted. That is, at the time of a vehicle rear collision, the battery 10 may swing in the direction of arrow X in FIG.

The behavior of the clamp 14 when the front part of the battery 10 is lifted is that the height of the front lower end Fb of the battery 10 is less than the height of the upper end Ft of the front contact portion 36 and the height of the upper end Ft. It differs greatly depending on the case of crossing. When the front portion of the battery 10 is lifted within a range not exceeding the height of the upper end Ft of the front contact portion 36, the front contact portion 36 receives an upward force from the battery 10. Since the front contact portion 36 is an inclined surface, a part of the upward force is converted into a forward force. That is, when the front portion of the battery 10 is lifted, the front contact portion 36 is pressed forward. Similarly, the side contact portion 34 also receives an upward force from the battery 10, and this upward force is further converted into a leftward force. As a result, the side contact portion 34 receives a leftward force from the battery 10.

If the forward force received by the front contact portion 36 and the leftward force received by the side contact portion 34 are substantially the same, the clamp 14 stands still without rotating. On the other hand, if there is a difference between the forward force received by the front contact portion 36 and the leftward force received by the side contact portion 34, the clamp 14 tries to rotate about the fastening hole 32. Regardless of which direction is rotated in the clockwise direction Rc or the counterclockwise direction Ra, either the front contact portion 36 or the side contact portion 34 comes into contact with the battery 10, so that the rotation exceeds a certain level. Is regulated. That is, when the front lower end Fb of the battery is lower than the upper end Ft of the front contact portion 36, the contact relationship between the front contact portion 36 and the side contact portion 34 and the battery 10 continues to be maintained, so that the battery 10 Withdrawal from the carrier 12 is prevented.

On the other hand, when the amount of lifting of the battery 10 becomes large and the front lower end Fb of the battery 10 becomes higher than the upper end Ft of the front contact portion 36, the clamp 14 is likely to rotate. That is, when the front lower end Fb of the battery 10 becomes higher than the upper end Ft of the front contact portion 36, the contact relationship between the front contact portion 36 and the front protrusion 18f is released, and the front contact portion 36 is the battery 10. Will not receive positive force from.

On the other hand, since the height of the lower end of the battery 10 becomes lower as it approaches the rear, the rearward portion of the side contact portion 34 maintains the contact relationship with the left side protruding portion 18l of the battery 10. In this case, the side contact portion 34 continues to receive a force leftward from the battery 10 (direction away from the battery 10). In response to this leftward force, the clamp 14 rotates around the fastening hole 32 in the direction in which the side contact portion 34 separates from the battery 10, that is, in the clockwise direction Rc. At this time, the front protruding portion 18f moves in the direction approaching the battery 10, but since the front protruding portion 18f is not in contact with the battery 10, the rotation of the clamp 14 is not restricted. As a result, in the conventional clamp 14, when the contact relationship between the front protrusion 18f and the front contact portion 36 is released, the contact relationship between the left side protrusion 18l and the side contact portion 34 can be easily achieved. It will be released. As a result, the battery 10 may be separated from the carrier 12.

In the holding structure of the battery 10 disclosed in the present specification, as described above and as shown in FIG. 5, the front standing wall portion 40 is connected to the upper end of the front protruding portion 18f. As shown in FIG. 5, after the front lower end Fb of the battery 10 rises above the upper end Ft of the front contact portion 36, the front protruding portion 18f of the battery 10 comes into contact with the front standing wall portion 40. At this time, the front wall portion 40 is pushed forward from the battery 10. As a result, the clamp 14 tries to rotate in the counterclockwise direction Ra about the fastening hole 32, and the side contact portion 34 moves in the direction approaching the battery 10. Then, the side contact portion 34 moves in the direction approaching the battery 10. FIG. 6 is an image diagram showing a state of the left side protruding portion 18l and the side contact portion 34 at this time. As shown in FIG. 6, in a place where the contact relationship between the left side protrusion 18l and the side contact portion 34 is maintained, when the left side protrusion 18l approaches the battery 10, the left side protrusion 18l is inclined to the side contact. The unit 34 pushes the battery 10 downward. As a result, further lifting of the battery 10 is suppressed, and by extension, the battery 10 is effectively prevented from being detached from the carrier 12.

As is clear from the above description, in the holding structure of the battery 10 disclosed in the present specification, since the clamp 14 is provided with the front standing wall portion 40 extending upward from the upper end of the front contact portion 36, the battery is caused by the rear collision of the vehicle. Even when the front portion of the battery 10 is raised, it is possible to effectively prevent the battery 10 from being detached from the carrier 12. In this example, the front end and the left end of the battery 10 are pressed by the clamp 14, but this configuration may be reversed left and right. That is, the structure may be such that the front end and the right end of the battery 10 are pressed and fixed by the clamp 14.

10 battery, 12 carrier, 14 clamp, 18b rear protrusion, 18f front protrusion, 18l left side protrusion, 18r right side protrusion, 20 accommodation recess, 22 return part, 26 bottom surface, 30 fastening position, 32 fastening hole, 34 Side contact part, 36 Front contact part, 38 Fastening part, 40 Front standing wall part, 42 Leg part, 44 Fastening bolt.

Claims (1)

A power storage device mounted on a vehicle, and a power storage device mounted on the vehicle so that the front surface thereof is substantially parallel to the vehicle width direction.
A carrier having a storage recess in which at least the lower portion of the power storage device is housed, and
A clamp for fixing the power storage device to the carrier,
With
The power storage device is provided with a front projecting portion projecting forward at the lower part of the front surface thereof, and a lateral projecting portion projecting laterally outward at the lower portion of one side surface thereof.
The clamp
A front contact portion that abuts on the upper surface of the front protrusion, and a front contact portion.
A side contact portion that abuts on the upper surface of the lateral protrusion, and a side contact portion
A front standing wall portion that rises from the rear end of the front contact portion so as to approach or contact the front end surface of the power storage device.
At the fastening position located one side outside the front wall portion, the fastening portion to be fastened to the carrier and the fastening portion
The clamp is rotatable about the fastening position in a horizontal plane.
The holding structure of the power storage device is characterized by this.

Images