JP2022124252A - On-vehicle battery housing structure - Google Patents

Abstract

To provide an on-vehicle battery housing structure capable of protecting a battery from collision impact via a simpler configuration.SOLUTION: An on-vehicle battery housing structure 14 includes a battery housing 15 and a cross member 16. The battery housing 15 contains a built-in battery 17, and has a housing lower part 18 and a housing lid part 19. The housing lid part 19 has a rear end projection 20 projecting to the rear side further than the housing lower part 18, and a forward end projection 21 projecting to the front side further than the housing lower part 18. Further, in longitudinal view, the cross member 16 overlaps the housing lid part 19.SELECTED DRAWING: Figure 4A

Description

TECHNICAL FIELD The present invention relates to an in-vehicle battery housing structure, and more particularly to an in-vehicle battery housing structure capable of protecting a battery stack from impact in the event of a collision accident.

Electric vehicles and hybrid vehicles are equipped with a large-capacity vehicle battery that supplies electric power to the motor in order to rotate the motor that provides driving force to the vehicle. This vehicle battery is heavy and occupies a large volume in order to ensure a sufficient continuous running distance. Therefore, the vehicle battery is arranged, for example, under the seat or under the rear floor.

Patent Literature 1 describes a vehicle body structure that protects a battery. Specifically, an upper reinforcing member is arranged to span over the battery. By providing the upper reinforcing member, the load input from the rear of the vehicle at the time of a rear-end collision can be dispersed forward, and the battery mounted on the rear of the vehicle can be protected.

JP 2013-014312 A

However, in the configuration described in Patent Document 1, the upper reinforcing member that protects the battery mounted on the rear portion of the vehicle is a dedicated member for protecting the battery in the event of a collision, so the vehicle body configuration becomes complicated and the weight increases. There was a problem of high cost.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an in-vehicle battery housing structure capable of protecting the battery from impact in the event of a collision with a simpler structure. It is in.

An in-vehicle battery housing structure according to one embodiment of the present invention includes a battery housing and a vehicle structural member, the battery housing containing a battery, a housing lower portion, and a housing lid portion. and the housing lid has a rear end projecting portion that projects rearward from the lower portion of the housing, and a front end projecting portion that projects forward from the lower portion of the housing, It is characterized in that the vehicle structural member and the housing lid portion overlap each other when viewed in the front-rear direction.

According to the in-vehicle battery housing structure according to the embodiment of the present invention, it is possible to protect the battery from impact in the event of a collision with a simpler configuration. Specifically, when viewed in the front-rear direction, the vehicle structural member overlaps the substantially plate-like horizontally extending housing lid portion, so that when a vehicle collision occurs, the front end projecting portion and the rear end projecting portion overlap. is in contact with the vehicle structural member to generate a reaction force. Therefore, the battery housed in the battery housing can be protected from collision impact.

1 is a perspective view showing a vehicle provided with an in-vehicle battery housing structure according to an embodiment of the present invention; FIG. 1 is a perspective view showing a rear structure of a vehicle having an in-vehicle battery housing structure according to an embodiment of the present invention; FIG. 1 is an exploded perspective view showing a rear portion structure of a vehicle having an in-vehicle battery housing structure according to an embodiment of the present invention; FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is side sectional drawing which shows the vehicle-mounted battery housing structure which concerns on embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is front sectional drawing which shows the vehicle-mounted battery housing structure which concerns on embodiment of this invention. It is a figure which shows the vehicle-mounted battery housing structure which concerns on embodiment of this invention, and is a perspective view which shows a battery housing. It is a figure which shows the vehicle-mounted battery housing|casing structure which concerns on embodiment of this invention, and is a perspective view which shows a housing|casing cover part. 1 is a diagram showing an in-vehicle battery housing structure according to an embodiment of the present invention, and is an exploded perspective view showing the battery housing. FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing an in-vehicle battery housing structure according to an embodiment of the present invention, and is a front sectional view showing the in-vehicle battery housing structure; FIG. 10 is a diagram showing an in-vehicle battery housing structure according to another embodiment of the present invention, and is a perspective view showing the battery housing. FIG. 5 is an exploded perspective view showing an in-vehicle battery housing structure according to another embodiment of the present invention; FIG. 4 is a side cross-sectional view showing an in-vehicle battery housing structure according to another embodiment of the present invention; FIG. 10 is a diagram showing an in-vehicle battery housing structure according to still another embodiment of the present invention, and is a perspective view showing the battery housing. FIG. 11 is an exploded perspective view showing an in-vehicle battery housing structure according to still another embodiment of the present invention; FIG. 11 is a side cross-sectional view showing an in-vehicle battery housing structure according to still another embodiment of the present invention;

An in-vehicle battery housing structure 14 according to the present embodiment and a vehicle 10 having the in-vehicle battery housing structure 14 will be described below with reference to the drawings. In the following description, the same reference numerals are given to the same members in principle, and repeated descriptions will be omitted. Further, in the following description, each direction of up, down, front, back, left, and right is used, but left and right are left and right when the vehicle 10 is facing forward.

FIG. 1 is a perspective view of a vehicle 10 having an in-vehicle battery housing structure 14 as seen from the upper rear side. Here, the rear gate covering the rear end of the vehicle body 11 of the vehicle 10 is omitted. As the vehicle 10, an EV (Electric Vehicle), an HEV (Hybrid Electric Vehicle), a PHEV (Plug-in Hybrid Electric Vehicle), or the like can be adopted.

A rear seat 12 is arranged at the rear of the vehicle interior of the vehicle body 11, and a storage space 13 is formed behind it, and a battery 17 and an in-vehicle battery housing structure 14, which will be described later, are placed in the storage space 13.

FIG. 2 is a perspective view showing the rear structure of the vehicle 10 having the vehicle battery housing structure 14. As shown in FIG. Here, the battery 17 housed in the floor recess 31 is not shown.

First, the configuration of the rear portion of the vehicle in which the vehicle-mounted battery housing structure 14 is arranged will be described. A floor recess 31 is formed by partially recessing the vehicle body floor 22 of the vehicle body 11 . A rear panel 30 is attached to the rear end of the vehicle body floor 22 , and a bumper beam 27 is arranged behind the rear panel 30 via a connecting member 29 . The bumper beam 27 is a member that absorbs impact by deforming at the time of collision. The function of the on-vehicle battery housing structure 14 will be described below by taking as an example a case where a pole collision occurs in which the pole 28 collides (rear-ends) with the rear end of the vehicle 10 from behind. A cross member 16, which is a vehicle structural member, is installed across the vehicle body floor 22. As shown in FIG. The in-vehicle battery housing structure 14 according to the present embodiment is arranged between the rear panel 30 and the cross member 16 in the vehicle body 11, and protects the battery 17 from impact when a rear collision occurs.

FIG. 3 is an exploded perspective view showing the rear structure of the vehicle 10 having the vehicle battery housing structure 14. As shown in FIG.

The in-vehicle battery housing structure 14 includes a battery housing 15 and a cross member 16 that is a vehicle structural member. The battery housing 15 contains a battery 17 and has a housing lower portion 18 and a housing lid portion 19 .

The housing lower portion 18 has a housing body portion 181 and a housing support portion 182 . The housing main body 181 is a storage container that stores the battery 17 (not shown). The housing main body 181 is integrally molded from a synthetic resin or aluminum die-cast member. The housing support portion 182 is a substantially bar-shaped member attached to the front end and the rear end of the housing main body portion 181 and extending in the left-right direction, and protrudes in the left-right direction with respect to the housing main body portion 181 . A portion of the housing support portion 182 that protrudes in the left-right direction is attached to the upper surface of the vehicle body floor 22 .

The housing lid portion 19 is a substantially plate-shaped member that closes the top opening of the housing lower portion 18 . As will be described later, the housing lid portion 19 also has a function of protecting the battery 17 from impact when a rear collision occurs.

FIG. 4A is a side sectional view showing the rear portion configuration of the vehicle 10, corresponding to the section line AA in FIG. FIG. 4B is a front sectional view and corresponds to the section line BB in FIG.

FIG. 4A is a cross-sectional view of the in-vehicle battery housing structure 14, showing the situation when a pole collision occurs. Also, the pole 28 after the occurrence of the rear collision is indicated by a dashed line.

The housing lid portion 19 has a rear end projecting portion 20 and a front end projecting portion 21 . The rear end projecting portion 20 is a portion where the rear end of the battery housing 15 protrudes rearward from the rear surface of the lower housing portion 18 . The front end projecting portion 21 is a portion where the front end of the battery housing 15 protrudes forward from the front surface of the lower housing portion 18 . By doing so, when a pole collision occurs, the shock acting on the battery housing 15 is received by the housing lid portion 19, and the lower housing portion 18 and the battery 17 are protected from the shock.

Further, in the present embodiment, the cross member 16 and the housing lid portion 19 at least partially overlap each other when viewed in the front-rear direction. Here, the directions in the front-rear direction are indicated by hatched arrows. Here, the upper end of the housing lid portion 19 is arranged below the upper end of the cross member 16 , and the lower end of the housing lid portion 19 is arranged above the lower end of the cross member 16 .

When a pole collision occurs, the pole 28 enters the vehicle body 11 from the rear end side and impacts the rear end projecting portion 20 that is the rear end of the housing lid portion 19 . As described above, the rear end projecting portion 20 of the housing lid portion 19 projects further rearward than the rear surface of the housing lower portion 18 , so that the pole 28 impacts the rear end projecting portion 20 of the housing lid portion 19 . However, a large impact does not act on the rear surface of the housing lower part 18 .

Next, the housing lid portion 19 pushed by the pole 28 moves forward, and the front end projecting portion 21 of the housing lid portion 19 contacts the rear surface of the cross member 16 . The cross member 16 is a vehicle structural member responsible for the rigidity of the vehicle body 11 and generates sufficient reaction force. Therefore, the cross member 16 prevents the housing lid portion 19 from moving due to the collision with the pole.

From the above, when a pole collision occurs, the impact accompanying the pole collision is that the housing cover portion 19, which is a substantially plate-shaped member, collides with the cross member 16, and a direct load is applied to the housing lower portion 18. is alleviated. Therefore, the deformation of the housing lower part 18 is minimized, and the battery 17 can be protected from the pole collision.

5A is a perspective view showing the battery housing 15, and FIG. 5B is a perspective view showing the housing lid portion 19. FIG.

With reference to FIG. 5A , the housing lid portion 19 has a housing support portion 182 , a front-rear hollow member 25 and a width-direction hollow member 26 . The front-rear hollow member 25 and the width-direction hollow member 26 also function as paths through which air for cooling the battery 17 flows, as will be described later.

The front-rear direction hollow member 25 is a hollow member extending along the vehicle front-rear direction. A plurality of longitudinal hollow members 25 are arranged along the width direction of the vehicle. A front end and a rear end of the longitudinal hollow member 25 are supported by a housing support portion 182 .

The widthwise hollow member 26 is a hollow member extending along the width direction of the vehicle. Here, the width direction hollow member 26 is arranged on the rear end side of the front-rear direction hollow member 25 .

With reference to FIG. 5B, an opening 35 is formed by opening the lower surface of the front-rear direction hollow member 25 . The opening 35 is formed on the upper side of the battery 17 (not shown here).

Referring to FIG. 5A again, the battery 17 (not shown here) is fixed below the width direction hollow member 26, the junction box 32 is arranged on the left side of the battery 17, and the junction box 32 is arranged on the right side of the battery 17. , the control unit 33 is arranged.

6A is an exploded perspective view showing the battery housing 15, and FIG. 6B is a front cross-sectional view showing the in-vehicle battery housing structure 14. FIG. The housing lid portion 19 protects the battery 17 from collision impact and also functions as an air passage through which air for cooling the battery 17 flows.

6A, an insertion portion 37 is formed in the width direction hollow member 26. As shown in FIG. The insertion portion 37 is an air blowing port in which the front surface of the widthwise hollow member 26 protrudes forward. The insertion portion 37 is formed corresponding to each of the longitudinal hollow members 25 . The insertion portion 37 is inserted into the rear end opening of the longitudinal hollow member 25 . Further, the left end opening of the width direction hollow member 26 is connected to a duct (not shown), through which cooling air is blown to the battery 17 . Here, the cooling air is outside air, indoor air, cooling air cooled by an in-vehicle air conditioner, or the like.

The insertion portion 37 of the width direction hollow member 26 is connected to the rear end opening of the front/rear direction hollow member 25 , and the front end opening of the front/rear direction hollow member 25 is closed by the lid member 36 .

A function of cooling the battery 17 by the air passing through the housing lid portion 19 will be described. First, air passing through a duct (not shown) is blown from the left to the widthwise hollow member 26 . After that, the air is blown into each of the front-rear direction hollow members 25 from the insertion portion 37 of the width direction hollow member 26 .

Referring to FIG. 6B, the air blown to width direction hollow member 26 is blown to battery 17 via opening 35 . Specifically, air is blown between the batteries 17 . By doing so, the battery 17 can be cooled. In addition, since the air is blown from the openings 35 formed above each battery 17, each battery 17 can be effectively cooled.

Further, referring to FIG. 6A, battery 17 is suspended and fixed to housing lid portion 19 . Specifically, the upper end of the battery 17 is suspended and fixed to the lower surface of the front-rear direction hollow member 25 via fastening means such as screws. By doing so, the front-rear direction hollow member 25 constitutes a part of the housing lid portion 19, functions as an air passage for circulating the cooling air, and furthermore supports the battery 17 by hanging it. It also functions as a component. Therefore, it is possible to reduce the number of parts constituting the in-vehicle battery housing structure 14 and reduce the cost.

Each figure of FIG. 7 is a figure which shows the vehicle-mounted battery housing structure 14 which concerns on another form. 7A is a perspective view showing the battery housing 15, FIG. 7B is an exploded perspective view showing the in-vehicle battery housing structure 14, and FIG. 7C is a side sectional view showing the in-vehicle battery housing structure 14. FIG. The configuration of the in-vehicle battery housing structure 14 shown here is basically the same as that shown in FIG.

Specifically, referring to FIGS. 7A and 7B, a vehicle body floor opening 23 is formed in the vehicle body floor 22 . The vehicle body floor opening 23 has a shape into which the housing lower portion 18 of the battery housing 15 can be fitted, and has a substantially rectangular shape here. It is fixed by fitting the housing lower part 18 of the battery housing 15 into the vehicle body floor opening 23 . As a result, the lower housing part 18 is exposed below the vehicle body floor 22 .

Further, the housing lower portion 18 can be formed from a die-cast metal plate such as aluminum or an integrally molded synthetic resin plate. The housing lower part 18 can be arranged so as to drop into the vehicle body floor opening 23 .

With reference to FIG. 7C, by doing so, the lower portion of the housing lower portion 18 can be arranged outside the vehicle. In addition, since the integrally molded housing lower part 18 is highly waterproof, it eliminates the need for a waterproof pan that is generally required. be able to.

Each figure of FIG. 8 is a figure which shows the vehicle-mounted battery housing structure 14 which concerns on another form. 8A is a perspective view showing the battery housing 15, FIG. 8B is an exploded perspective view showing the in-vehicle battery housing structure 14, and FIG. 8C is a side sectional view showing the in-vehicle battery housing structure 14. FIG. The configuration of the vehicle-mounted battery housing structure 14 shown here is basically the same as that shown in FIG.

Specifically, as shown in FIGS. 8A and 8B, the interior of the housing lower portion 18 is partitioned into two in the front-rear direction by a partition wall 40, and a battery storage area 39 is formed on the front side, A sub-trunk 38 is formed on the rear side.

The vehicle body floor opening 23 is formed by opening most of the body floor 22 other than the skeleton. A lower housing portion 18 is accommodated in the vehicle body floor opening portion 23 so as to be dropped.

The partition wall 40 is a portion formed integrally with other portions that constitute the lower housing portion 18 . The battery storage area 39 is an internal area of the housing lower part 18 and is a portion partitioned on the front side by the partition wall 40, in which the battery 17 is stored. The sub-trunk 38 is an inner region of the lower housing part 18 and is a portion partitioned on the rear side by a partition wall 40, and can store an in-vehicle tool such as a wrench.

Referring to FIG. 8C , rear end projecting portion 20 of housing lid portion 19 is arranged on the rear side of partition wall 40 . By doing so, when the pole collision described above occurs, the impact of the pole collision is received by the housing lid portion 19 and the cross member 16, and the battery 17 housed in the battery housing area 39 is effectively protected. be able to.

The above-described embodiment can provide the following main effects.

Referring to FIG. 4A , according to the on-vehicle battery housing structure 14, when a vehicle collision occurs, the cross member 16, which is a vehicle structural member, overlaps with the housing lid portion 19 when viewed in the front-rear direction. Then, the housing cover 19 having the front end projection 21 and the rear end projection 20 abuts against the cross member 16 to generate a reaction force, which causes the battery 17 housed in the battery housing 15 to undergo a collision impact. can be protected from

Furthermore, referring to FIG. 7C, the lower housing portion 18 can be lowered by facing the lower portion of the housing floor 22 below. Therefore, the cross member 16 and the housing lid portion 19 can overlap each other when viewed in the front-rear direction.

Further, referring to FIG. 5A, the front-rear hollow member 25 and the width-direction hollow member 26 that constitute the housing lid portion 19 can be used as an air passage for blowing cooling air. Therefore, the members forming the air passage for cooling the battery 17 can be simplified.

Furthermore, referring to FIG. 5A, by suspending and fixing the battery 17 from the housing lid portion 19, a dedicated member for fixing the battery 17 can be eliminated, and the configuration for fixing the battery 17 can be simplified. can do.

Further, referring to FIG. 4A, when a collision accident occurs in the rear portion of the vehicle 10, the rear end projecting portion 20 is pushed forward by the collision object, and further, the rear end projecting portion 20 contacts the cross member 16. . By doing so, it is possible to protect the battery 17 accommodated under the housing lid portion 19 from the impact when a collision occurs.

Although the embodiments of the present invention have been described above, the present invention is not limited to these, and modifications can be made without departing from the gist of the present invention. Moreover, each of the above-described forms can be combined with each other.

For example, referring to FIG. 6A, in the present embodiment, when viewed in the front-rear direction, the cross member 16 can overlap the entirety of the housing lid portion 19 in the thickness direction. It is not necessary to overlap everything. For example, the housing lid portion 19 may partially protrude upward from the upper end of the cross member 16 . Furthermore, the housing lid portion 19 may partially protrude downward from the lower end of the cross member 16 . Even with such a configuration, the housing lid portion 19 is supported by the cross member 16 and the housing lower portion 18 and the battery 17 can be protected by the housing lid portion 19 when a rear collision occurs.

10 Vehicle 11 Vehicle body 12 Rear seat 13 Storage space 14 In-vehicle battery housing structure 15 Battery housing 16 Cross member 17 Battery 18 Lower housing portion 181 Housing main body portion 182 Housing support portion 19 Housing lid portion 20 Rear end projection portion 21 Front end protrusion 22 Vehicle floor 23 Vehicle floor opening 25 Front-back direction hollow member 26 Width direction hollow member 27 Bumper beam 28 Pole 29 Connection member 30 Rear panel 31 Floor recess 32 Junction box 33 Control unit 35 Opening 36 Lid member 37 Insertion portion 38 Sub-trunk 39 Battery storage area 40 Partition wall

Claims (5)

comprising a battery housing and a vehicle structural member,
The battery housing contains a battery, and has a housing lower part and a housing lid,
The housing lid has a rear end projecting portion that projects rearward from the lower portion of the housing and a front end projecting portion that projects forward from the lower portion of the housing,
An in-vehicle battery housing structure, wherein the vehicle structural member and the housing lid portion overlap each other when viewed in a front-rear direction. a vehicle body floor opening provided in the vehicle body floor into which the lower housing portion of the battery housing can be fitted;
2. The in-vehicle battery housing structure according to claim 1, wherein the housing lower portion is fixed by being fitted into the vehicle body floor opening, and the housing lower portion faces below the vehicle body floor. a duct for guiding cooling air blown to the battery,
The housing lid has a front-rear hollow member that extends along the vehicle front-rear direction and a width-direction hollow member that extends along the vehicle width direction,
3. The in-vehicle battery housing structure according to claim 1, wherein the cooling air passes through the duct, the front-rear hollow member, and the width-direction hollow member and is blown toward the battery. 4. The in-vehicle battery housing structure according to claim 1, wherein the battery is suspended from the housing lid. 5. The in-vehicle battery housing structure according to claim 1, wherein the vehicle structural member is a cross member arranged on the front side of the rear end projecting portion.

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