JP2020125025A - Vehicle battery protection structure - Google Patents

Abstract

To make it difficult for the influence of deformation to spread into a vehicle battery, when a protective member is deformed, in a vehicle battery protection structure for protecting a vehicle battery loaded on the vehicle.SOLUTION: A vehicle battery protection structure loaded on a vehicle includes a protective member and a support member. The protective member is a member for protecting a vehicle battery. The support member supports the protective member in the separated state from the vehicle battery on the furthermore lower side in a vertical direction than the undersurface of the vehicle battery, and on the furthermore outer peripheral side than the outer peripheral side on the undersurface of the vehicle battery.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to a vehicle battery protection structure for protecting a vehicle battery mounted on a vehicle.

For example, Patent Document 1 below proposes, as the vehicle battery protection structure described above, a technique of disposing a protection member in front of a vehicle battery in an electric vehicle to prevent the vehicle battery from being subjected to an impact such as a collision. ing. The protective member is configured to absorb shock when it breaks.

JP, 2018-140711, A

By the way, the vehicle battery protection structure is required to withstand a load applied to the vehicle battery in a horizontal direction in preparation for a vehicle collision. However, in the above vehicle battery protection structure, since the protection member and the vehicle battery are arranged side by side in the horizontal direction, when the protection member is deformed, the deformed protection member easily interferes with the vehicle battery. There was a problem.

In one aspect of the present disclosure, in a vehicle battery protection structure for protecting a vehicle battery mounted on a vehicle, when the protective member is deformed, it is desirable that the influence of the deformation is less likely to be transmitted to the vehicle battery.

One aspect of the present disclosure is a vehicle battery protection structure that is mounted on a vehicle and includes a protection member and a support member. The protection member is a member for protecting the vehicle battery. The support member supports the protective member vertically below the lower surface of the vehicle battery and further apart from the vehicle battery on the outer peripheral side of the outer peripheral portion of the lower surface of the vehicle battery.

According to such a configuration, the protection member is arranged vertically below the lower surface of the vehicle battery and further outward than the outer peripheral portion of the lower surface of the vehicle battery, and is separated from the vehicle battery. Therefore, when a horizontal load is applied to the protective member and the protective member is deformed, the protective member is deformed toward the lower side of the vehicle battery, so that the influence of the deformation is less likely to spread to the vehicle battery. it can.

In one aspect of the present disclosure, the protection member may be configured in a column shape extending in the longitudinal direction. Further, the support member may be configured to hold the protection member at a plurality of holding positions set on both sides in the longitudinal direction.

Further, the centroid of the protection member when the protection member is cut along a virtual plane orthogonal to the longitudinal direction of the protection member is the centroid when the protection member is cut at an intermediate position of the plurality of holding positions. It may be located vertically above the centroid when the protective member is cut.

With such a configuration, the centroid of the protective member at the holding position is located above the centroid of the protective member at an intermediate position of the plurality of holding positions, and therefore when the protective member receives a load from the horizontal direction. The protective member is easily deformed downward in the horizontal direction. That is, when the position of the centroid of the protective member is different, a moment is generated in the protective member when the protective member receives a load, so that the moment becomes 0, in other words, the centroid is at the same height. The protective member will deform.

Therefore, the protective member is likely to be deformed downward in the vertical direction, which is the direction away from the vehicle battery. Therefore, in this configuration, when the protective member is deformed, the influence of the deformation can be less likely to spread to the vehicle battery.

One aspect of the present disclosure is a vehicle battery structure, in which the protective member is configured in a columnar shape extending in the longitudinal direction. The support member may be configured to hold the protection member at a plurality of holding positions set on both sides in the longitudinal direction, and may be configured as a frame surrounding the periphery of the vehicle battery.

With such a configuration, the protective member is supported by the supporting member configured as a frame, and the protective member can be arranged between the frames, so that the protective member can be easily attached and detached.
In one aspect of the present disclosure, the protective member may be configured as a crushing member configured to absorb impact when deforming.

According to such a configuration, since the protection member is the crushing member configured to absorb the impact when deformed, the impact can be less likely to spread around the vehicle battery.
In one aspect of the present disclosure, the protection member may be solid.

According to such a configuration, the shear resistance of the protective member can be improved as compared with the configuration in which the protective member is hollow, so that the vehicle battery can be strongly protected.

It is a top view which shows arrangement|positioning of the battery protection structure for vehicles in 1st Embodiment. FIG. 2 is a sectional view taken along line II-II in FIG. 1. FIG. 3 is a sectional view taken along line III-III in FIG. 1. It is a top view of a vehicle battery lower part. FIG. 5 is a sectional view taken along line V-V in FIG. 2. It is explanatory drawing which shows the centroid in the protection member of 1st Embodiment. It is an end view which shows the protection member of 2nd Embodiment. It is sectional drawing which shows the attachment aspect of the protection member of 2nd Embodiment. FIG. 9 is a sectional view taken along line IX-IX in FIG. 8. It is explanatory drawing which shows the centroid in the protection member of 2nd Embodiment.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
[1. First Embodiment]
[1-1. Schematic configuration]
The vehicle battery protection structure 1A according to one aspect of the present disclosure is arranged under the floor of the vehicle 100, as shown in FIG. 1. In the example shown in FIG. 1, vehicle 100 is configured as a hybrid vehicle including internal combustion engine 71, exhaust pipe 72, and vehicle battery 10. The vehicle 100 may be configured as an electric vehicle that does not include the internal combustion engine 71 and the exhaust pipe 72.

In FIG. 1, the left-right direction on the paper is the front-back direction of the vehicle 100, and the Rr direction on the right-hand side of the paper is the rear side of the vehicle 100. The up-down direction of the paper is the left-right direction of the vehicle 100, and the Rh direction on the upper side of the paper is the right side of the vehicle.

The vehicle battery protection structure 1A is a structure for assembling the vehicle battery 10 used for driving the vehicle 100, such as an electric vehicle or a hybrid vehicle, into a body of the vehicle 100. The vehicle battery protection structure 1A has a function of protecting the vehicle battery 10 mainly against a load input from the horizontal direction.

The vehicle battery protection structure 1A is arranged in a region between the side rails 5 located at both ends of the vehicle 100 in the left-right direction. The side rails 5 are a part of an underfloor structure that is a structure for maintaining the shape of the underfloor portion of the vehicle 100.

The vehicle battery protection structure 1A includes a lower member 40 and a protection member 60A, as shown in the drawings starting from FIG. As shown in FIGS. 1 and 2, the vehicle battery protection structure 1A may include an upper member 20, a connecting member 50, a plurality of mounting portions 31, and a plurality of reinforcing members 30.

The lower member 40 corresponds to a support member in the present disclosure, and holds the vehicle battery 10 under the vehicle battery 10. More specifically, the lower member 40 is configured as frames 41 and 42 that cover a part of the lower surface of the vehicle battery 10, and holds the lower surface of the vehicle battery 10. The details of the lower member 40 and the protection member 60A will be described later.

The upper member 20 is located above the vehicle battery 10 and constitutes a part of the body of the vehicle 100. More specifically, the upper member 20 is configured as a plate-shaped panel, is a part of the underfloor structure of the vehicle 100, and functions as a partition wall that separates the vehicle interior and the underfloor space of the vehicle 100. The upper member 20 has a seat or the like (not shown) arranged on the upper portion, and since it is necessary to support the weight of the occupant and the like, it is reinforced by the plurality of reinforcing members 30.

The plurality of reinforcing members 30 are configured to project downward from the upper member 20. Specifically, the plurality of reinforcing members 30 are configured in a prism shape extending along the front-rear direction of the vehicle 100. Then, the vehicle battery 10 is attached to the plurality of reinforcing members 30.

Each of the plurality of reinforcing members 30 includes a plurality of mounting portions 31 for mounting the vehicle battery 10. The plurality of mounting portions 31 are portions for mounting the connecting member 50.
The connecting member 50 is configured to connect the upper member 20 and the lower member 40, and is connected to at least one of the plurality of mounting portions 31. More specifically, the connecting member 50 is formed in a columnar shape, is fixed to the lower member 40 that holds the vehicle battery 10, and is attached to the mounting portion 31 in this state.

The connection member 50 and the attachment portion 31 are attached by any method. For example, the connection member 50 is provided with a bolt having a screw thread, and the attachment portion 31 is provided with a plurality of screw holes, and the attachment method is achieved by engaging the bolts of the connection member 50 with the screw holes. Can be adopted. A mounting method such as welding may be adopted. Further, the connecting member 50 may be composed of only members such as bolts.

[1-2. Detailed configuration]
The details of the lower member 40 and the protection member 60A will be described below.
As shown in FIGS. 2 to 5, the lower member 40 includes a horizontal frame 41 extending in the left-right direction of the vehicle 100 and a vertical frame 42 extending in the front-rear direction of the vehicle 100 as frames arranged in the horizontal direction. Equipped with. The horizontal frame 41 and the vertical frame 42 are arranged so as to surround the vehicle battery 10 together with the connecting member 50 and the like.

The horizontal frame 41 contacts the lower surface of the vehicle battery 10 and supports the vehicle battery 10. The vertical frame 42 is located below the horizontal frame 41 and supports the horizontal frame 41.
The protection member 60A is a member for protecting the vehicle battery 10. As shown in FIG. 4, the protection member 60</b>A is arranged at six locations around the vehicle battery 10 so as to surround most of the vehicle battery 10. Note that FIG. 4 illustrates only the vehicle battery 10, the lower member 40, and the protection member 60A.

The protection member 60A has a columnar shape extending in the longitudinal direction. The protection member 60A is configured as a hollow member having a hollow interior, and is configured as a crushing member configured to absorb an impact when a load is applied and deformed.

The four protection members 60A arranged so that the longitudinal direction is along the front-rear direction of the vehicle 100 are provided on the left and right sides of the vehicle battery 10 in order to protect the vehicle battery 10 from a load from the left-right direction of the vehicle 100. Will be placed. These protection members 60A are arranged between the plurality of horizontal frames 41. That is, the protection member 60A is arranged in order to supplement the strength of a portion where the lateral frame 41 does not exist and which is relatively disadvantageous in strength.

In addition, the two protection members 60</b>A arranged so that the longitudinal direction extends along the left-right direction of the vehicle 100 are provided in front of and behind the vehicle battery 10 in order to protect the vehicle battery 10 from a load from the front-back direction of the vehicle 100. Placed in each. These protection members 60A are arranged between the plurality of vertical frames 42. These six protection members 60A are all attached to the horizontal frame 41 or the vertical frame 42 in the same manner.

Here, of the six protection members 60A, the details of the protection member 60A located on the front left side of the vehicle among the protection members 60A arranged along the front-rear direction of the vehicle 100 will be described. As shown in FIG. 5, the protection member 60A includes a joint portion 61, a taper portion 62, and an intermediate portion 63. The protection member 60A has a joint portion 61, a taper portion 62, and an intermediate portion 63 that are integrally formed, and is formed by processing one material that extends in the longitudinal direction.

The joints 61 are located at both ends in the longitudinal direction of the protection member 60A and are attached to the lower side of the horizontal frame 41 by joining. That is, the horizontal frame 41 separates the protective member 60A from the vehicle battery 10 on the lower side in the vertical direction than the lower surface of the vehicle battery 10 and on the outer peripheral side of the outer peripheral portion of the lower surface of the vehicle battery 10. Support in a fixed state.

Specifically, the protection member 60A and the outer peripheral portion on the lower surface of the vehicle battery 10 are separated by a distance d, as shown in FIG. Further, the intermediate portion 63 of the protection member 60A and the lower member 40 are similarly separated by the distance d. Note that the joint portion 61 and the horizontal frame 41 can be joined in any manner such as fastening with bolts or the like, welding by welding, or the like.

As shown in FIG. 5, the taper portion 62 is a portion that extends from the joint portion 61, and is configured such that the cross-sectional area continuously increases as the distance from the joint portion 61 increases. The intermediate portion 63 is a portion located between the tapered portions 62 and has a uniform cross-sectional area.

The joint portion 61, the taper portion 62, and the intermediate portion 63 have the same lower surface position, and the upper surface positions are different from each other, and the upper surface of the intermediate portion 63 is located higher than the joint portion 61. However, the position of the upper surface of the intermediate portion 63 is configured to be positioned vertically below the position of the lower surface of the vehicle battery 10.

With such a configuration, as shown in FIG. 6, the center Z2 of the protective member 60A in the intermediate portion 63 is located vertically above the center Z1 of the protective member 60A in the joint portion 61. In addition, the above-mentioned centroid is a centroid in a cross-sectional view of the protection member 60A cut along a virtual plane orthogonal to the longitudinal direction of the protection member 60A.

[1-3. effect]
According to the first embodiment described in detail above, the following effects are obtained.
(1a) One aspect of the present disclosure is a vehicle battery protection structure 1A mounted on a vehicle 100, which includes a protection member 60A and a lower member 40. The protection member 60A is a member for protecting the vehicle battery 10. The lower member 40 separates the protective member 60A from the vehicle battery 10 on the lower side in the vertical direction than the lower surface of the vehicle battery 10 and on the outer peripheral side of the outer peripheral portion of the lower surface of the vehicle battery 10. Support in the open state.

According to such a configuration, when a horizontal load is applied to the protection member 60A and the protection member 60A is deformed, the protection member 60A is deformed toward the lower side of the vehicle battery 10, so that the influence of the deformation is not exerted. It is possible to make it difficult for the vehicle battery 10 to spread.

(1b) In one aspect of the present disclosure, the protection member 60A is formed in a column shape extending in the longitudinal direction. Further, the lower member 40 is configured to hold the protection member 60A at a plurality of holding positions set on both sides in the longitudinal direction.

Further, the centroid of the protection member 60A when the protection member 60A is cut along a virtual plane orthogonal to the longitudinal direction of the protection member 60A is the centroid when the protection member 60A is cut at an intermediate position between the plurality of holding positions. It is configured to be positioned vertically above the centroid when the protection member 60A is cut at the holding position.

According to such a configuration, the center of gravity of the protection member 60A in the holding position is located above the center of gravity of the protection member 60A in the middle position of the plurality of holding positions, so that the protection member 60A receives a load from the horizontal direction. When receiving, the protective member 60A is easily deformed downward in the horizontal direction. That is, when the position of the centroid of the protective member 60A is different, a moment is generated in the protective member 60A when the protective member 60A receives a load, so that the moment becomes 0, in other words, the centroid is at the same height. The protective member 60A is about to be deformed.

For this reason, the protection member 60A is easily deformed downward in the direction away from the vehicle battery 10 in the vertical direction. Therefore, in this configuration, when the protective member 60A is deformed, the influence of the deformation can be less likely to spread to the vehicle battery 10.

(1c) In one aspect of the present disclosure, the protection member 60A has a columnar shape extending in the longitudinal direction. The lower member 40 is configured to hold the protective member 60A at a plurality of holding positions set on both sides in the longitudinal direction, and serves as frames 41 and 42 arranged to surround the vehicle battery 10. Composed.

According to such a configuration, since the protection member 60A is supported by the lower member 40 configured as the frames 41 and 42, and the protection member 60A can be arranged between the frames 41 and 42, the protection member 60A can be easily attached and detached. Can be done.

(1d) In one aspect of the present disclosure, the protection member 60A may be configured as a crushing member configured to absorb a shock when deformed.
According to such a configuration, since the protection member 60A is the crushing member, it is possible to make it difficult for the impact to spread around the vehicle battery 10.

(1e) In one aspect of the present disclosure, the protection member 60A may be solid.
According to such a configuration, the shear resistance of the protective member 60A can be improved as compared with the configuration in which the protective member 60A is hollow, so that the vehicular battery 10 can be strongly protected.

[2. Second Embodiment]
[2-1. Differences from the first embodiment]
The second embodiment has the same basic configuration as that of the first embodiment, and therefore the differences will be described below. The same reference numerals as those in the first embodiment indicate the same configurations, and refer to the preceding description.

In the above-described vehicle battery protection structure 1A of the first embodiment, the protection member 60A is composed of one member. On the other hand, the vehicle battery protection structure 1B of the second embodiment is different from the first embodiment in that the protection member 60B is composed of a plurality of members.

[2-2. Constitution]
The vehicle battery protection structure 1B of the second embodiment includes a protection member 60B shown in FIGS. 7, 8 and 9 in place of the protection member 60A of the first embodiment. The protection member 60B includes a joining member 65 and an intermediate member 66.

The intermediate member 66 is, like the above-described intermediate portion 63, a columnar portion having a uniform cross-sectional area when the intermediate member 66 is cut along an imaginary plane along the longitudinal direction. The joining member 65 is a member that supports both ends of the intermediate member 66. The joining member 65 includes a lower surface portion 65A, a side surface portion 65B, a wing portion 65C, and a joining portion 65D.

The lower surface portion 65A contacts the lower surfaces of both ends of the intermediate member 66 and holds the intermediate member 66 from below.
The side surface portion 65B contacts approximately the lower half of the side surface of the intermediate member 66, and holds the intermediate member 66 from the side.

The wing portion 65C is a portion that projects laterally from the upper end portion of the side surface portion 65B. The wing 65C has a function of protecting the intermediate member 66 by protruding laterally.
The joint portion 65D is a flat plate-shaped portion extending from the lower surface portion 65A, and is joined to the lower surface of the horizontal frame 41. The joint portion 65D does not have the side surface portion 65B and the wing portion 65C.

Such a joining member 65 supports the intermediate member 66 so as not to fall out. Further, as shown in FIG. 10, the center Z4 of the intermediate member 66 is located vertically above the center Z3 of the joint portion 65D of the joint member 65.

[2-3. effect]
According to the second embodiment described in detail above, the effect (1a) of the above-described first embodiment is achieved, and further the following effect is achieved.

(2a) In the vehicle battery protection structure 1B of the second embodiment, the protection member 60B is composed of a plurality of members such as the joining member 65 and the intermediate member 66. With such a configuration, the intermediate member 66 can have a simple shape such as a rectangular parallelepiped, and thus the protection member 60B can be realized with a simple configuration.

[3. Other Embodiments]
Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and various modifications can be implemented.

(3a) Although the protective members 60A and 60B are configured to be hollow in the above embodiment, the present invention is not limited to this. For example, the protection members 60A and 60B may be solid so that there is no space inside.

According to such a configuration, the shear resistance of the protection members 60A and 60B can be improved as compared with the configuration in which the protection members 60A and 60B are hollow, and thus the vehicle battery 10 can be strongly protected. it can. The shear strength is the resistance to the shearing force of the member.

(3b) A plurality of functions of one constituent element in the above embodiment may be realized by a plurality of constituent elements, or one function of one constituent element may be realized by a plurality of constituent elements. .. Further, a plurality of functions of a plurality of constituent elements may be realized by one constituent element, or one function realized by a plurality of constituent elements may be realized by one constituent element. Moreover, you may omit a part of structure of the said embodiment. Further, at least a part of the configuration of the above-described embodiment may be added or replaced with respect to the configuration of the other above-described embodiment.

(3c) In addition to the vehicle battery protection structures 1A and 1B described above, the present disclosure can be implemented in various forms such as a system including the vehicle battery protection structures 1A and 1B as a constituent element.

1A, 1B... Vehicle battery protection structure, 5... Side rail, 10... Vehicle battery, 20... Upper member, 30... Reinforcing member, 31... Mounting portion, 40... Lower member, 41... Horizontal frame, 42... Vertical Frame, 50... Connection member, 60A, 60B... Protective member, 61... Joining part, 62... Tapered part, 63... Intermediate part, 65... Joining member, 65A... Bottom part, 65B... Side part, 65C... Wing part, 65D ... Joining portion, 66... Intermediate member, 71... Internal combustion engine, 72... Exhaust pipe, 100... Vehicle.

Claims (5)

A vehicle battery protection structure mounted on a vehicle,
A protection member which is a member for protecting the vehicle battery,
Support for supporting the protection member in a state of being vertically lower than the lower surface of the vehicle battery and further separated from the vehicle battery on the outer peripheral side of the outer surface of the lower surface of the vehicle battery. Members,
A vehicle battery protection structure comprising: The vehicle battery protection structure according to claim 1,
The protective member is configured in a columnar shape extending in the longitudinal direction,
The support member is configured to hold the protective member at a plurality of holding positions set on both sides in the longitudinal direction,
The centroid of the protective member when the protective member is cut in a virtual plane orthogonal to the longitudinal direction of the protective member is the centroid when the protective member is cut at an intermediate position of the plurality of holding positions, A vehicle battery protection structure configured to be positioned vertically above a centroid when the protection member is cut at a holding position. The vehicle battery protection structure according to claim 1 or 2,
The protective member is configured in a columnar shape extending in the longitudinal direction,
The support member is configured to hold the protection member at a plurality of holding positions set on both sides in the longitudinal direction, and is also configured as a frame surrounding the periphery of the vehicle battery. Vehicle battery protection structure. The vehicle battery protection structure according to any one of claims 1 to 3,
The battery protection structure for a vehicle, wherein the protection member is configured as a crush member configured to absorb a shock when deformed. The vehicle battery protection structure according to any one of claims 1 to 3,
The protection member is a solid battery protection structure for a vehicle.

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