JP5786777B2 - vehicle - Google Patents

Description

  The present invention relates to a battery mounting structure.

  A hybrid vehicle, an electric vehicle, and the like using a battery such as a lithium ion battery or a nickel hydride battery as a driving power source are known. The battery is mounted at various positions on the vehicle.

  Patent Document 1 discloses a vehicle in which a battery pack is mounted under a rear seat, a plurality of battery modules included in the battery pack are arranged under the seat, and other electronic devices are mounted under the seat rail.

JP 2004-243895 A

  However, in the above-described configuration, the rear seat deformed at the time of a vehicle collision or the like may come into contact with the battery pack, and the case of the battery pack, that is, the battery case may be greatly deformed.

  Therefore, an object of the present invention is to suppress the deformation of the battery case at the time of a vehicle collision or the like.

In order to solve the above problems, a vehicle according to the present invention includes, as one aspect, (1) a first battery unit and a second battery unit disposed at a position spaced from the first battery unit. A battery case that houses the first and second battery parts, a seat frame that forms part of a vehicle seat and is disposed at a position corresponding to the space between the first and second battery parts; A reinforcing bracket disposed inside the battery case, and the reinforcing bracket is disposed at a position aligned with the seat frame in a vehicle height direction, and the first battery unit includes a plurality of the first battery units. In this case, the upper surface of the reinforcing bracket and the upper surface of the first battery module are located in substantially the same plane . According to the configuration of (1), the deformation of the battery case is suppressed, and the external force applied to the first battery module at the time of a vehicle collision can be more effectively reduced.

According to another aspect of the vehicle according to the present invention, (2) a first battery unit, a second battery unit disposed at a position separated from the first battery unit, and the first and second units. A battery case that houses the battery part, a seat frame that constitutes a part of the vehicle seat and is disposed at a position corresponding to between the first battery part and the second battery part, And a reinforcing bracket disposed inside the battery case, wherein the reinforcing bracket is disposed at a position aligned with the seat frame in a height direction of the vehicle. In the configuration of (2) , (3) the first battery unit is a first battery module in which a plurality of single cells are arranged, and the upper surface of the reinforcing bracket and the first battery module. The upper surface can be positioned in substantially the same plane. According to the configuration of (3) , the deformation of the battery case is suppressed, and the external force applied to the first battery module at the time of a vehicle collision can be more effectively reduced.

(4) In the configurations of (1) to (3) , the reinforcing bracket has a first flange portion fixed to the inner upper surface of the battery case and a second flange portion fixed to the inner bottom surface of the battery case. An external force applied to the battery case from the seat frame when the vehicle seat is tilted by a vehicle collision is connected from the first flange portion to the second flange portion and the first and second flange portions. An escape portion that transmits to the flange portion can be included. According to the configuration of (4), the external force applied from the seat frame can be released to the bottom surface of the battery case. Thereby, it can suppress that the upper surface of a battery case deform | transforms and contact | abuts a battery part.

(5) In the configuration of (4) , the battery case includes a lower case, a first upper case located above the first battery part, and a second located above the second battery part. The upper case and one end are fixed to the upper surface of the first upper case, and the other end is fixed to the upper surface of the second upper case, thereby connecting the first and second upper cases. The first flange portion can be fixed to an inner surface of the first upper case corresponding to a region where the first upper case and the connection plate overlap. According to the configuration of (5), the external force applied from the seat frame can be released to the lower case. Thereby, it can suppress that an upper case deform | transforms and contacts a battery part.

(6) In the configurations of (1) to (5) , the vehicle seat is a rear seat, and a luggage room is formed on the rear side of the rear seat. According to the configuration of (6) , when the load loaded in the luggage room at the time of the vehicle collision comes into contact with the rear seat, the rear seat tilts toward the floor panel and the seat frame comes into contact with the battery case. Sometimes, deformation of the battery case can be suppressed.

(7) In the configuration of (1) , the seat frame may be a frame of a seat cushion.

(8) In the configuration of the above (2) or (7) , the vehicle seat does not have a slide rail for adjusting the position of the vehicle. According to the configuration of (8) , in a vehicle having a vehicle seat whose rigidity is weakened by the amount that the slide rail is omitted, that is, a vehicle having a structure in which the vehicle seat easily comes into contact with the battery case at the time of a vehicle collision. The deformation of the case can be suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, it can suppress that a battery case deform | transforms in the case of a vehicle collision etc.

It is a perspective view in a part of vehicles. It is the figure which looked at rear seat R1 from the vehicle width direction. It is sectional drawing of a battery pack. It is an enlarged view in a part of battery pack. It is a disassembled perspective view of a reinforcement bracket. It is an assembly completion figure of a reinforcement bracket.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a perspective view of a part of the passenger compartment. FR is the forward direction of the vehicle, RR is the reverse direction of the vehicle, RH is the right direction toward the forward direction of the vehicle, LH is the left direction toward the forward direction of the vehicle, and UPR is It is an upward direction (height direction) of the vehicle, and DOWN is a downward direction of the vehicle. When it is not necessary to distinguish between the RH direction and the LH direction, these are collectively referred to as the vehicle width direction. These definitions are the same in other drawings.

  The vehicle may be an electric vehicle having only a battery pack as a driving power source, or a hybrid vehicle having a battery pack and other power reduction (for example, an internal combustion engine, a fuel cell) as a driving power source. The hybrid vehicle may be a plug-in hybrid vehicle that can charge a battery pack with an external power source.

  The rear seat R1, the rear seat R2, and the rear seat R3 are juxtaposed in the vehicle width direction. The rear seat R1 is disposed at an end portion in the RH direction in the vehicle interior. The rear seat R3 is disposed at the end in the LH direction in the vehicle interior. The rear seat R2 is disposed between the rear seats R1 and R2. The rear seats R1 to R3 are supported by the support bar 5. The support bar 5 extends through the frame of the rear seats R1 to R3 in the vehicle width direction. The detailed configuration of the rear seats R1 to R3 will be described later.

A luggage room L is provided in the RR direction of the rear seats R1 to R3. The luggage room L includes a deck board 1. A load can be mounted on the deck board 1. In the present embodiment, it is assumed that two loads T1 and T2 are mounted on the deck board 1 . The load T1 is located in the RR direction of the rear seat R1. The load T2 is located in the RR direction of the rear seat R3.

  The battery pack 3 is located in the DOWN direction of these rear seats R1 to R3. The battery pack 3 is fixed to the floor panel 2 of the vehicle. The fixing method may be fastening means. The detailed configuration of the battery pack 3 will be described later.

  FIG. 2 is a view of the rear seat R1 as viewed from the vehicle width direction, and an arrow A indicates the direction in which the rear seat R1 tilts when the vehicle collides. The hip point S1 virtually indicates a hip point when the occupant is seated on the rear seat R1. The rear seat R <b> 1 includes a headrest frame 41, a seat back frame 42, a seat base frame (corresponding to a seat frame) 43, and a seat leg portion 44.

  A headrest 41 a illustrated in FIG. 1 is attached to the headrest frame 41. The headrest 41a prevents the head from tilting backward by coming into contact with the head of an occupant seated on the rear seat R1.

  A seed back (not shown) that is in contact with the back of an occupant seated on the rear seat R1 is attached to the seat back frame 42. A seat cushion that supports the hips of the occupant seated on the rear seat R1 is attached to the seat base 43. Since the configurations of the rear seats R2 and R3 are basically not different from the configuration of the rear seat R1, the description will not be repeated.

  FIG. 3 is a cross-sectional view of the battery pack taken along the line aa shown in FIG. 4 is an enlarged view in which a region in a part surrounded by a dotted line in FIG. 3 is enlarged. The battery pack 3 includes a first battery module (corresponding to a first battery unit) 10, a second battery module (corresponding to a second battery unit) 11, and a battery pack case (corresponding to a battery case) 4. The first reinforcing bracket 16 and the second reinforcing bracket 17 are included.

  The first battery module 10 includes a plurality of single cells. These single cells are connected in series or in parallel via bus bars (not shown). The single battery may be a square battery or a cylindrical battery. The single battery may be a battery cell or a module in which a plurality of battery cells are connected. Here, a battery cell means the element of the minimum unit which can be charged / discharged. The single battery may be a secondary battery such as a lithium ion battery or a nickel metal hydride battery, or a capacitor. The second battery module 11 may have the same configuration as the first battery module 10. However, the number of single cells included in the second battery module 11 may be different from the number of single cells included in the first battery module 10. The first battery module 10 and the second battery module 11 can be connected to each other in series or in parallel.

  The first battery module 10 is positioned in the DOWN direction of the seat cushion of the rear seat R1, and is disposed at a position different from the seat base 43 of the rear seat R1 in the vehicle width direction. That is, the seat cushion of the rear seat R1 is positioned in the UPR direction of the first battery module 10, but the seat base 43 is not positioned.

  The second battery module 11 is positioned in the DOWN direction of the seat cushion of the rear seat R3, and is disposed at a position different from the seat base 43 of the rear seat R3 in the vehicle width direction. That is, the seat cushion of the rear seat R3 is positioned in the UPR direction of the second battery module 11, but the seat base 43 is not positioned.

  The battery pack case 4 includes a lower case 12, a first upper case 13, a second upper case 14, and an upper case connection plate 15. The first upper case 13 protrudes in the UPR direction and covers the UPR direction of the first battery module 10. The first upper case 13 has one end 13a in the RH direction bent toward the DOWN direction and the other end 13b in the LH direction extending in the vehicle width direction. The first upper case 13 can be made of metal.

  The second upper case 14 protrudes in the UPR direction and covers the UPR direction of the second battery module 11. The second upper case 14 has one end portion 14a in the LH direction bent toward the DOWN direction, and the other end portion 14b in the RH direction extending in the vehicle width direction. The second upper case 14 can be made of the same material as the first upper case 13.

  The upper case connecting plate 15 extends in the vehicle width direction. The end of the upper case connecting plate 15 in the RH direction is fixed to the upper surface of the other end 13 b of the first upper case 13, and the end of the upper case connecting plate 15 in the LH direction is the second upper case 14. It is being fixed to the upper surface of the other end part 14b. As the fixing method, welding can be used. The seat base 43 of the rear seat R1 is positioned in the UPR direction in the region where the first upper case 13 and the upper case connecting plate 15 overlap. The seat base 43 of the rear seat R3 is located in the UPR direction in the region where the second upper case 14 and the upper case connecting plate 15 overlap.

  The first reinforcing bracket 16 is disposed inside the battery pack case 4. Here, as illustrated in FIG. 2, in the event of a vehicle collision, the load T1 loaded in the luggage room L may move in the FR direction and collide with the rear seat R1. When the impact force when the load T1 collides with the rear seat R1 is large, the rear seat R1 tilts in the direction of arrow A, and the seat base 43 of the rear seat R1 contacts the battery pack case 4. In this embodiment, the 1st reinforcement bracket 16 is arrange | positioned in the position corresponding to the contact part of the battery pack case 4 with which the seat base 43 of rear seat R1 contact | abuts. Thereby, the deformation of the battery pack case 4 is suppressed, and the first battery module 10 accommodated in the battery pack case 4 is protected.

  The second reinforcing bracket 17 is disposed inside the battery pack case 4. Here, similarly to the case described above, in the event of a vehicle collision, the load T2 loaded in the luggage room L may move in the FR direction and collide with the rear seat R3. When the impact force when the load T3 collides with the rear seat R3 is large, the rear seat R3 tilts toward the floor panel 2, and the seat base 43 of the rear seat R3 contacts the battery pack case 4. In the present embodiment, the second reinforcing bracket 17 is disposed at a position corresponding to the contact portion of the battery pack case 4 with which the seat base 43 of the rear seat R3 contacts. Thereby, the deformation of the battery pack case 4 is suppressed, and the second battery module 11 accommodated in the battery pack case 4 is protected.

  Next, the configuration of the first reinforcing bracket 16 will be described in detail with reference to FIGS. Here, FIG. 5 is an exploded perspective view of the first reinforcing bracket 16, and FIG. 6 is an assembled view of the first reinforcing bracket 16. The first reinforcing bracket 16 includes a bracket body 161 and a sub bracket 162. The bracket body 161 includes an impact relief portion (corresponding to a relief portion) 161a, an upper flange portion (corresponding to a first flange portion) 161b, a lower flange portion (corresponding to a second flange portion) 161c, and an arch portion 161d. Including. The bracket body 161 can be formed by bending a metal plate. The bending method may be press molding.

  The impact relief portion 161a extends in the UPR direction of the vehicle, and is formed with a thin thickness in the vehicle width direction. The upper flange portion 161b is formed at the end of the impact relief portion 161a in the UPR direction. The upper flange portion 161b extends in a plane including the horizontal direction. A fastening hole 161b1 is formed in the upper flange portion 161b. The upper flange portion 161b is fastened to a region where the other end portion 13b of the first upper case 13 and the upper case connecting plate 15 overlap. That is, the seat base 43 of the rear seat R1 is positioned in the UPR direction of the upper flange portion 161b.

  The lower flange portion 161c is formed at the end portion of the impact relief portion 161a in the DOWN direction. The lower flange portion 161c extends in a plane including the horizontal direction. The area of the lower flange portion 161c in the horizontal direction is set larger than the area of the upper flange portion 161b in the horizontal direction. Fastening holes 161c1 are formed at both ends of the lower flange 161c. The lower flange portion 161 c is fastened to the inner surface of the lower case 12.

  The arch part 161d is formed at both ends of the impact relief part 161a in the vehicle width direction. The arch portion 161d protects the W / H (wire harness) used for the battery pack 3 from the edge (sheet metal edge) of the first reinforcing bracket 16, and also allows the worker who performs the assembly work of the battery pack 3 to be the first. It protects from the edge (sheet metal edge) of the reinforcing bracket 16.

  The sub bracket 162 extends in the UPR direction and is formed thin. The sub bracket 162 can be formed by bending a metal plate. The bending method may be press molding. The sub bracket 161 is integrated with the bracket main body 161 by being welded to an area on the inner surface of the bracket main body 161 where the fastening holes 161b1 and 161c1 are avoided. The welding method may be arc welding or spot welding.

  In this manner, the strength of the first reinforcing bracket 16 can be increased by integrating the bracket body 161 and the sub bracket 162. Further, since the bracket main body 161 and the sub bracket 162 are formed thin, the first reinforcing bracket 16 can be reduced in weight.

  The effect of the first reinforcing bracket 16 at the time of a vehicle collision will be described in detail with reference to FIGS. 4 and 6. As described above, when the vehicle collides, the seat base 43 of the rear seat R1 moves downward toward the battery pack 3 and comes into contact with the region where the other end portion 13b of the first upper case 13 and the upper case connecting plate 15 overlap. Therefore, an external force in the DOWN direction is applied to the first reinforcing bracket 16. The external force applied to the first reinforcing bracket 16 is transmitted to the impact relief portion 161a and the sub bracket 162 via the upper flange portion 161b, and is further transmitted to the lower case 12 via the lower flange portion 161c. Thereby, the load applied to the upper case 13 is reduced, and the deformation of the upper case 13 is suppressed. By suppressing the deformation of the upper case 13, the first battery module 10 accommodated in the battery pack case 4 is protected. The configuration of the second reinforcing bracket 17 may be the same as the configuration of the first reinforcing bracket 16. In this case, the deformation | transformation of the upper case 13 is suppressed by the 2nd reinforcement bracket 17, and the 2nd battery module 11 is protected.

  In the above-described configuration, since the first reinforcing bracket 16 is housed inside the battery pack case 4, it is possible to increase the rigidity of the battery pack 3 while suppressing an increase in the size of the battery pack 3.

Moreover, since the deformation | transformation of the battery pack case 4 is suppressed by providing the 1st reinforcement bracket 16, the clearance gap formed between the battery pack 3 and the seat base 43 can be made small. That is, as a method for suppressing the deformation of the battery pack case 4 at the time of a vehicle collision, the movement amount of the seat base 43 is predicted, and the space between the seat base 43 and the battery pack case 4 is increased by the predicted movement amount. A method is also conceivable. However, in this method, since the space between the seat base 43 and the floor panel 2 is increased, the designability is impaired, or the battery pack 3 must be downsized. According to the configuration of the present embodiment, the provision of the first reinforcing bracket 16 allows contact between the battery pack case 4 and the seat base 43 at the time of a vehicle collision. Can be suppressed.

  In addition, when the deck board 1 is installed at a position higher than the hip point S1, the distance between the support bar 5 serving as a rotation fulcrum of the rear seat R1 and the collision portion of the load T1 at the time of collision increases and is added to the rear seat R1. The moment increases. Thus, even if the moment of the rear seat R1 increases, the deformation of the battery pack case 4 can be sufficiently suppressed by providing the first reinforcing bracket 16.

  Further, the end surface of the first reinforcing bracket 16 in the UPR direction and the end surface of the first battery module 10 in the UPR direction are arranged in the same plane, that is, at the same height (including errors), so that the upper The load applied to the first battery module 10 from the case 13 can be more effectively suppressed.

(Modification 1)
In the above-described embodiment, the case where the seat base 43 is positioned in the UPR direction of the battery pack case 4 has been described, but the present invention is not limited to this. The present invention can also be applied when, for example, a slide rail (seat frame) is positioned in the UPR direction of the battery pack case 4. Here, the slide rail allows movement of the vehicle seat in the FR direction and the RR direction, and enables adjustment of the position of the vehicle seat. When the slide rail comes into contact with the battery pack case 4 by tilting the vehicle seat at the time of a vehicle collision, the reinforcing brackets 16 and 17 are provided at positions corresponding to the contact portions of the battery pack case 4 with which the slide rail comes into contact. be able to. Thereby, the deformation | transformation of the battery pack case 4 is suppressed and the 1st battery module 10 and the 2nd battery module 11 can be protected from a collision.

(Modification 2)
In the above-described embodiment, the case where two battery modules are accommodated in the battery pack case 4 has been described, but the present invention is not limited to this. The present invention can also be applied when, for example, three or more battery modules are accommodated in the battery pack case 4.

(Modification 3)
In the above-described embodiment, the battery pack 3 is disposed under the rear seat, but the present invention is not limited to this. The present invention can also be applied when, for example, the battery pack 3 is disposed under the front seat.

(Modification 4)
The reinforcing bracket may have any configuration as long as the deformation of the battery pack case 4 can be suppressed, and is not limited to the configuration illustrated in FIGS. 5 and 6. For example, a reinforcing bracket provided with braces, a reinforcing bracket made of a thick plate material, or the like may be used.

DESCRIPTION OF SYMBOLS 1 Deck board 2 Floor panel 3 Battery pack 4 Battery pack case 5 Support rod 10 1st battery module 11 2nd battery module
12 Lower case 13 First upper case 14 Second upper case 15 Upper case connecting plate 16 First reinforcing bracket
17 Second reinforcement bracket 41 Headrest frame
42 Seat back frame 43 Seat base frame 161 Bracket body 161a Relief part 161b Upper flange part 161c Lower flange part 161d Arch part

Claims (8)

A first battery unit;
A second battery unit disposed at a position spaced from the first battery unit;
A battery case that houses the first and second battery units;
A part of a vehicle seat, and a seat frame disposed at a position corresponding to between the first and second battery parts;
A reinforcing bracket disposed inside the battery case,
The reinforcing bracket is arranged at a position aligned with the seat frame in the height direction of the vehicle ,
The first battery unit is a first battery module in which a plurality of single cells are arranged,
The vehicle according to claim 1, wherein the upper surface of the reinforcing bracket and the upper surface of the first battery module are located in substantially the same plane . A first battery unit;
A second battery unit disposed at a position spaced from the first battery unit;
A battery case that houses the first and second battery units;
A seat frame that constitutes a part of a vehicle seat and is disposed at a position corresponding to between the first and second battery units;
A reinforcing bracket disposed inside the battery case,
The vehicle, wherein the reinforcing bracket is arranged at a position aligned with the seat frame in a height direction of the vehicle. The first battery unit is a first battery module in which a plurality of single cells are arranged,
The vehicle according to claim 2 , wherein an upper surface of the reinforcing bracket and an upper surface of the first battery module are located in substantially the same plane. The reinforcing bracket includes a first flange portion fixed to the inner upper surface of the battery case, a second flange portion fixed to the inner bottom surface of the battery case, and the first and second flange portions. And a relief part for transmitting an external force applied from the seat frame to the battery case when the vehicle seat is tilted due to a vehicle collision from the first flange part to the second flange part. The vehicle according to any one of claims 1 to 3 . The battery case includes a lower case, a first upper case positioned above the first battery portion, a second upper case positioned above the second battery portion, and one end portion of the first case. A connection plate that connects the first and second upper cases by being fixed to the upper surface of the upper case and having the other end fixed to the upper surface of the second upper case,
The vehicle according to claim 4 , wherein the first flange portion is fixed to an inner surface of the first upper case corresponding to a region where the first upper case and the connection plate overlap. The vehicle seat is a rear seat,
The vehicle according to any one of claims 1 to 5, wherein a luggage room is formed behind the rear seat. The vehicle according to claim 1 , wherein the seat frame is a seat cushion frame. The vehicle according to claim 2 or 7 , wherein the vehicle seat does not have a slide rail for adjusting a position of the vehicle.

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