Vehicle battery housing structure

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]

[0001] The present invention relates to an in-vehicle battery casing structure, and more particularly to an in-vehicle battery casing structure that can protect a battery stack from impact in the event of a collision accident. [Background technology]

[0002] Electric vehicles and hybrid vehicles are equipped with a large-capacity vehicle battery that supplies power to the motor that drives the vehicle. To ensure sufficient continuous driving distance, this vehicle battery is heavy and occupies a large volume. Therefore, this vehicle battery is placed, for example, under the seat or under the rear floor.

[0003] Patent Document 1 describes a vehicle body structure that protects a battery. Specifically, an upper reinforcing member is disposed so as to span above the battery. By providing the upper reinforcing member, the load input from the rear of the vehicle during a rear-end collision can be dispersed forward, thereby protecting the battery mounted at the rear of the vehicle. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2013-014312 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the configuration described in Patent Document 1, the upper reinforcing member that protects the battery mounted at the rear of the vehicle is a dedicated member for protecting the battery in the event of a collision, which creates an issue that the vehicle body configuration becomes complicated, resulting in increased weight and higher costs.

[0006] The present invention has been made in consideration of these problems, and an object of the present invention is to provide an in-vehicle battery casing structure that can protect a battery from impact during a collision with a simpler configuration. [Means for solving the problem]

[0007] The vehicle-mounted battery housing structure of the present invention is , The battery housing includes a battery and a vehicle structural member, the battery housing has a battery built therein and has a housing lower portion and a housing lid portion, the housing lid portion has a rear end protruding portion protruding rearward from the housing lower portion and a front end protruding portion protruding forward from the housing lower portion, the vehicle structural member and the housing lid portion overlap each other when viewed in the front-rear direction, The battery housing further includes a vehicle floor opening provided on the vehicle floor into which the lower part of the battery housing can be fitted, and the lower part of the housing is fixed by fitting it into the vehicle floor opening, with the lower part of the housing facing below the vehicle floor. The vehicle-mounted battery casing structure of the present invention includes a battery casing and a vehicle structural member, the battery casing has a built-in battery and a housing lower part and a housing lid part, the housing lid part has a rear end protruding part that protrudes rearward from the housing lower part and a front end protruding part that protrudes forward from the housing lower part, the vehicle structural member and the housing lid part overlap each other when viewed in the front-rear direction, The battery pack further includes a duct for guiding cooling air to be blown onto the battery, and the housing lid portion has a longitudinal hollow member that is a hollow member extending along the longitudinal direction of the vehicle, and a widthwise hollow member that is a hollow member extending along the width direction of the vehicle, and the cooling air passes through the duct, the longitudinal hollow member, and the widthwise hollow member, and is blown onto the battery. Effect of the Invention

[0008] According to the vehicle-mounted battery housing structure of the embodiment of the present invention, the battery can be protected from impact during a collision with a simpler configuration. Specifically, when viewed in the front-rear direction, the vehicle structural member and the housing lid part extending horizontally in a substantially plate-like shape are overlapped, so that when a vehicle collision occurs, the housing lid part having a front end protrusion and a rear end protrusion abuts against the vehicle structural member, generating a reaction force. Therefore, the battery housed in the battery housing can be protected from the impact of the collision. [Brief description of the drawings]

[0009] [Figure 1] 1 is a perspective view showing a vehicle equipped with an on-board battery casing structure according to an embodiment of the present invention; [Diagram 2] 1 is a perspective view showing a rear structure of a vehicle equipped with an in-vehicle battery casing structure according to an embodiment of the present invention; [Diagram 3]1 is an exploded perspective view showing a rear structure of a vehicle equipped with an in-vehicle battery casing structure according to an embodiment of the present invention; [Figure 4A] 1 is a side cross-sectional view showing an in-vehicle battery casing structure according to an embodiment of the present invention. [Figure 4B] 1 is a front cross-sectional view showing an in-vehicle battery casing structure according to an embodiment of the present invention. [Figure 5A] FIG. 1 is a diagram showing an in-vehicle battery casing structure according to an embodiment of the present invention, and is a perspective view showing a battery casing. [Figure 5B] FIG. 2 is a diagram showing an in-vehicle battery casing structure according to an embodiment of the present invention, and is a perspective view showing a casing lid portion. [Figure 6A] FIG. 1 is an exploded perspective view showing an in-vehicle battery casing structure according to an embodiment of the present invention; [Figure 6B] FIG. 1 is a front cross-sectional view showing an in-vehicle battery casing structure according to an embodiment of the present invention. [Figure 7A] FIG. 13 is a diagram showing an in-vehicle battery casing structure according to another embodiment of the present invention, and is a perspective view showing a battery casing. [Figure 7B] FIG. 11 is an exploded perspective view showing an in-vehicle battery casing structure according to another embodiment of the present invention. [Figure 7C] FIG. 11 is a side cross-sectional view showing an in-vehicle battery casing structure according to another embodiment of the present invention. [Figure 8A] FIG. 13 is a diagram showing an in-vehicle battery casing structure according to still another embodiment of the present invention, and is a perspective view showing a battery casing. [Figure 8B] FIG. 11 is an exploded perspective view showing an in-vehicle battery casing structure according to still another embodiment of the present invention. [Figure 8C] FIG. 11 is a side cross-sectional view showing an in-vehicle battery casing structure according to still another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The vehicle-mounted battery casing structure 14 according to this embodiment and the vehicle 10 equipped with the vehicle-mounted battery casing structure 14 will be described below with reference to the drawings. In the following description, the same components are in principle given the same reference numerals, and repeated description will be omitted. In addition, the following description will be given using the up, down, front, back, left and right directions, but the left and right refer to the left and right when facing forward of the vehicle 10.

[0011] 1 is a perspective view of a vehicle 10 equipped with an on-board battery casing structure 14, seen from above the rear side. Here, a tailgate covering the rear end of a body 11 of the vehicle 10 is omitted. The vehicle 10 may be an EV (Electric Vehicle), an HEV (Hybrid Electric Vehicle), a PHEV (Plug-in Hybrid Electric Vehicle), or the like.

[0012] A rear seat 12 is arranged at the rear of the passenger compartment of the vehicle body 11, and a storage space 13 is formed behind it. A battery 17 and an on-board battery casing structure 14, which will be described later, are arranged in the storage space 13.

[0013] 2 is a perspective view showing the rear structure of the vehicle 10 equipped with the vehicle-mounted battery casing structure 14. Here, the battery 17 housed in the floor recess 31 is not shown.

[0014] First, the configuration of the rear of the vehicle where the above-mentioned vehicle-mounted battery housing structure 14 is disposed will be described. The vehicle body floor 22 of the vehicle body 11 is partially concave to form a floor recess 31. A rear panel 30 is attached to the rear end of the vehicle body floor 22, and a bumper beam 27 is disposed behind the rear panel 30 via a connecting member 29. The bumper beam 27 is a member that absorbs impact by deforming during a collision. Below, the function of the vehicle-mounted battery housing structure 14 will be described using as an example a case where a pole 28 collides with the rear end of the vehicle 10 from behind (rear collision). In addition, a cross member 16, which is a vehicle structural member, is installed so as to cross the vehicle body floor 22. The vehicle-mounted battery housing structure 14 according to this embodiment is disposed 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.

[0015] FIG. 3 is an exploded perspective view showing the rear structure of a vehicle 10 equipped with an on-board battery casing structure 14. As shown in FIG.

[0016] The vehicle-mounted battery casing structure 14 includes a battery casing 15 and a cross member 16, which is a vehicle structural member. The battery casing 15 has a built-in battery 17, and also has a casing lower part 18 and a casing lid part 19.

[0017] The housing lower part 18 has a housing main body part 181 and a housing support part 182. The housing main body part 181 is a storage container that stores the battery 17 (not shown here). The housing main body part 181 is integrally molded from synthetic resin or aluminum die-cast members. The housing support parts 182 are attached to the front and rear ends of the housing main body part 181, are generally rod-shaped members that extend in the left-right direction, and protrude in the left-right direction from the housing main body part 181. The parts of the housing support parts 182 that protrude in the left-right direction are attached to the upper surface of the vehicle floor 22.

[0018] The housing lid 19 is a generally plate-shaped member that closes the upper opening of the housing lower part 18. As will be described later, the housing lid 19 also has the function of protecting the battery 17 from impact in the event of a rear-end collision.

[0019] Fig. 4A is a side cross-sectional view showing the rear configuration of the vehicle 10, and corresponds to the cross-sectional line AA in Fig. 2. Fig. 4B is a front cross-sectional view, and corresponds to the cross-sectional line BB in Fig. 2.

[0020] 4A is a cross-sectional view of the vehicle-mounted battery casing structure 14, showing a state in which a pole collision has occurred. Also, the pole 28 after the rear-end collision has occurred is shown by a dashed dotted line.

[0021] The housing lid 19 has a rear end protrusion 20 and a front end protrusion 21. The rear end protrusion 20 is a portion where the rear end of the battery housing 15 protrudes rearward from the rear surface of the housing lower part 18. The front end protrusion 21 is a portion where the front end of the battery housing 15 protrudes forward from the front surface of the housing lower part 18. By doing so, when a pole collision occurs, the housing lid 19 receives the impact acting on the battery housing 15, protecting the housing lower part 18 and the battery 17 from the impact.

[0022] In this embodiment, the cross member 16 and the housing lid 19 at least partially overlap each other when viewed in the front-rear direction. Here, the direction when viewed in the front-rear direction is indicated by a hatched arrow. Here, the upper end of the housing lid 19 is disposed below the upper end of the cross member 16, and the lower end of the housing lid 19 is disposed above the lower end of the cross member 16.

[0023] When a pole collision occurs, the pole 28 enters the vehicle body 11 from the rear end side and applies an impact to the rear end protrusion 20 which is the rear end of the housing lid 19. As described above, the rear end protrusion 20 of the housing lid 19 protrudes rearward beyond the rear surface of the housing lower part 18, so while the pole 28 applies an impact to the rear end protrusion 20 of the housing lid 19, no large impact acts on the rear surface of the housing lower part 18.

[0024] Next, the housing lid 19 pushed by the pole 28 moves forward, and the front end protrusion 21 of the housing lid 19 comes into contact with the rear surface of the cross member 16. The cross member 16 is a vehicle structural member that provides the rigidity of the vehicle body 11, and generates a sufficient reaction force. Therefore, the movement of the housing lid 19 caused by the pole collision is prevented by the cross member 16.

[0025] As a result of the above, when a pole collision occurs, the impact of the pole collision is mitigated by the housing cover 19, which is a substantially plate-shaped member, colliding with the cross member 16, thereby mitigating the direct load on the housing lower part 18. This minimizes deformation of the housing lower part 18, and makes it possible to protect the battery 17 from the pole collision.

[0026] FIG. 5A is a perspective view showing battery housing 15, and FIG. 5B is a perspective view showing housing lid 19. As shown in FIG.

[0027] 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 described below.

[0028] The front-rear hollow member 25 is a hollow member extending along the front-rear direction of the vehicle. A plurality of the front-rear hollow members 25 are arranged along the vehicle width direction. The front and rear ends of the front-rear hollow members 25 are supported by the housing support portion 182.

[0029] The widthwise hollow member 26 is a hollow member extending along the vehicle width direction. Here, the widthwise hollow member 26 is disposed on the rear end side of the front-rear direction hollow member 25.

[0030] 5B, an opening 35 is formed by opening the lower surface of the front-rear hollow member 25. The opening 35 is formed above the battery 17 (not shown).

[0031] Referring again to FIG. 5A, a battery 17 (not shown here) is fixed below the widthwise hollow member 26, with a junction box 32 disposed to the left of the battery 17 and a control unit 33 disposed to the right of the battery 17.

[0032] Fig. 6A is an exploded perspective view showing the battery housing 15, and Fig. 6B is a front cross-sectional view showing the vehicle-mounted battery housing structure 14. The housing lid 19 protects the battery 17 from collision impact, and also functions as an air passage through which air for cooling the battery 17 flows.

[0033] 6A, an insertion portion 37 is formed in the widthwise hollow member 26. The insertion portion 37 is an air outlet that protrudes forward from the front surface of the widthwise hollow member 26. The insertion portion 37 is formed corresponding to each of the front-rear hollow members 25. The insertion portion 37 is inserted into the rear end opening of the front-rear hollow member 25. The left end opening of the widthwise hollow member 26 is connected to a duct (not shown) through which cooling air is blown onto the battery 17. Here, the cooling air is outside air, indoor air, cooling air cooled by an in-vehicle air conditioner, or the like.

[0034] The rear end opening of the front-rear hollow member 25 is connected to an insertion portion 37 of the width-direction hollow member 26 , and the front end opening of the front-rear hollow member 25 is closed by a cover member 36 .

[0035] The function of cooling the batteries 17 by air passing through the housing lid portion 19 will be described. First, air passing through a duct (not shown) is blown from the left into the widthwise hollow member 26. Then, the air is blown from the insertion portion 37 of the widthwise hollow member 26 into the inside of each of the front-rear hollow members 25.

[0036] 6B, the air sent to the width-direction hollow member 26 is blown onto the batteries 17 through the openings 35. Specifically, the air is sent between the batteries 17. In this manner, the batteries 17 can be cooled. In addition, since the air is sent from the openings 35 formed above each battery 17, each battery 17 can be effectively cooled.

[0037] 6A, the battery 17 is suspended and fixed to the housing lid 19. Specifically, the upper end of the battery 17 is suspended and fixed to the lower surface of the front-rear hollow member 25 via a fastening means such as a screw. In this manner, the front-rear hollow member 25 constitutes a part of the housing lid 19, functions as an air passage for circulating cooling air, and also functions as a support member for suspending and fixing the battery 17. This reduces the number of parts constituting the vehicle-mounted battery housing structure 14, and reduces costs.

[0038] Each diagram in Fig. 7 shows an in-vehicle battery casing structure 14 according to another embodiment. Fig. 7A is a perspective view showing the battery casing 15, Fig. 7B is an exploded perspective view showing the in-vehicle battery casing structure 14, and Fig. 7C is a side cross-sectional view showing the in-vehicle battery casing structure 14. The configuration of the in-vehicle battery casing structure 14 shown here is basically similar to that shown in Fig. 3 etc., but the configuration for accommodating the battery casing 15 is different.

[0039] 7A and 7B, a vehicle floor opening 23 is formed in the vehicle floor 22. The vehicle floor opening 23 has a shape into which the lower housing part 18 of the battery housing 15 can be fitted, and here has a substantially rectangular shape. The lower housing part 18 of the battery housing 15 is fitted into the vehicle floor opening 23 to be fixed. This allows the lower housing part 18 to face below the vehicle floor 22.

[0040] The lower housing portion 18 can be formed from a die-cast metal plate such as aluminum, or an integrally molded synthetic resin plate. The lower housing portion 18 can be disposed so as to drop into an opening 23 in the vehicle floor.

[0041] 7C, this allows the lower portion of the housing lower part 18 to be located outside the vehicle. In addition, since the integrally molded housing lower part 18 has high waterproof properties, a waterproof pan that is generally required is not necessary, and the number of components of the vehicle-mounted battery housing structure 14 can be reduced, thereby achieving low costs.

[0042] Each diagram in Fig. 8 shows an in-vehicle battery casing structure 14 according to still another embodiment. Fig. 8A is a perspective view showing the battery casing 15, Fig. 8B is an exploded perspective view showing the in-vehicle battery casing structure 14, and Fig. 8C is a side cross-sectional view showing the in-vehicle battery casing structure 14. The configuration of the in-vehicle battery casing structure 14 shown here is basically the same as that shown in Fig. 7, but the configuration for accommodating the battery casing 15 is different.

[0043] Specifically, as shown in Figures 8A and 8B, the interior of the lower housing portion 18 is divided into two in the front-to-rear direction by a partition wall 40, with a battery storage area 39 formed on the front side and a sub-trunk 38 formed on the rear side.

[0044] The vehicle body floor opening 23 is formed by opening most of the vehicle body floor 22 except for the framework thereof. The housing lower part 18 is accommodated in the vehicle body floor opening 23 so as to be dropped therein.

[0045] The partition wall 40 is a portion formed integrally with other portions constituting the lower housing portion 18. The battery storage area 39 is an internal area of ​​the lower housing portion 18, partitioned on the front side by the partition wall 40, and stores the battery 17. The sub-trunk 38 is an internal area of ​​the lower housing portion 18, partitioned on the rear side by the partition wall 40, and can store on-board tools such as wrenches.

[0046] 8C, the rear end protrusion 20 of the housing lid 19 is disposed rearward of the partition wall 40. In this manner, when the above-mentioned pole collision occurs, the impact of the pole collision is received by the housing lid 19 and the cross member 16, and the battery 17 accommodated in the battery storage area 39 can be effectively protected.

[0047] The above-described embodiment can provide the following main effects.

[0048] Referring to FIG. 4A, according to the vehicle-mounted battery casing structure 14, when viewed in the front-to-rear direction, the cross member 16, which is a vehicle structural member, and the casing lid portion 19 overlap each other, so that in the event of a vehicle collision, the casing lid portion 19, having a front end protrusion 21 and a rear end protrusion 20, abuts against the cross member 16, generating a reaction force, thereby protecting the battery 17 contained in the battery casing 15 from the collision impact.

[0049] 7C, the housing lower part 18 can be lowered by facing below the vehicle floor 22. Therefore, the cross member 16 and the housing lid part 19 can be overlapped when viewed in the front-rear direction.

[0050] 5A, the front-rear hollow member 25 and the width-direction hollow member 26 constituting the housing lid portion 19 can be used as an air passage for blowing cooling air. Therefore, the members constituting the air passage for cooling the battery 17 can be simplified.

[0051] Furthermore, referring to FIG. 5A, by fixing battery 17 in a suspended state by housing lid portion 19, a dedicated member for fixing battery 17 is not required, and the configuration for fixing battery 17 can be simplified.

[0052] 4A, when a collision accident occurs at the rear of the vehicle 10, the rear end protrusion 20 is pushed forward by the colliding object, and further, the rear end protrusion 20 abuts against the cross member 16. In this way, the battery 17 stored below the housing lid 19 can be protected from the impact when a collision occurs.

[0053] Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and modifications can be made without departing from the scope of the present invention. In addition, the above-described embodiments can be combined with each other.

[0054] For example, referring to Fig. 6A, in this embodiment, the entire thickness direction of the housing lid portion 19 can be overlapped with the cross member 16 when viewed in the front-rear direction, but it is not necessary that the entire thickness direction of the housing lid portion 19 overlaps. 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 this configuration, when a rear-end collision occurs, 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. [Explanation of symbols]

[0055] 10 Vehicles 11 Body 12 Rear seat 13. Storage Space 14. Vehicle battery housing structure 15 Battery case 16 Cross member 17 Batteries 18 Lower part of the case 181 Housing body 182 Housing support part 19 Housing cover 20 Rear end protrusion 21 Front end protrusion 22 Car body floor 23 Vehicle floor opening 25 Front-rear hollow member 26 Width direction hollow member 27 Pampa Beam 28 Paul 29 Connection parts 30 Rear Panel 31 Floor recess 32 Junction Box 33 Control Unit 35 Opening 36 Lid member 37 Insertion section 38 Subtrunk 39 Battery Compartment 40 Compartment Wall

Claims

1. A battery battery comprising: a battery housing; and a vehicle structural member; The battery housing has a battery built-in and includes a housing lower portion and a housing lid portion, the housing lid portion has a rear end protruding portion protruding rearward from the housing lower portion and a front end protruding portion protruding forward from the housing lower portion, When viewed in the front-rear direction, the vehicle structural member and the housing lid portion overlap each other, A vehicle floor opening provided in a vehicle floor and into which the lower part of the battery housing can be fitted, An in-vehicle battery casing structure, characterized in that the lower part of the casing is fitted into and fixed to the vehicle floor opening, with the lower part of the casing facing below the vehicle floor.

2. A battery battery comprising: a battery housing; and a vehicle structural member; The battery housing has a battery built-in and includes a housing lower portion and a housing lid portion, the housing lid portion has a rear end protruding portion protruding rearward from the housing lower portion and a front end protruding portion protruding forward from the housing lower portion, When viewed in the front-rear direction, the vehicle structural member and the housing lid portion overlap each other, and a duct for guiding cooling air to be blown onto the battery. The housing lid portion has a front-rear hollow member that is a hollow member extending along the front-rear direction of the vehicle, and a width-direction hollow member that is a hollow member extending along the vehicle width direction, An in-vehicle battery casing structure, characterized in that the cooling air passes through the duct, the front-rear hollow member, and the width-direction hollow member and is blown onto the battery.

3. 3. The vehicle-mounted battery casing structure according to claim 1, wherein the battery is fixed to the casing lid in a suspended state.

4. 4. The vehicle-mounted battery casing structure according to claim 1, wherein the vehicle structural member is a cross member disposed in front of the rear end projection.

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