Source: https://patents.google.com/patent/JP2013199196A/en
Timestamp: 2020-01-23 13:48:28
Document Index: 124847476

Matched Legal Cases: ['art 24', 'art 25', 'art 24', 'art 24', 'art 25', 'art 55', 'art 62', 'art 18', 'art 19', 'art 25', 'art 26', 'art 27', 'art 28', 'art 29', 'art 30', 'art 31', 'art 32']

JP2013199196A - Battery pack mounting structure for electric car - Google Patents
Battery pack mounting structure for electric car Download PDF
JP2013199196A
JP2013199196A JP2012068587A JP2012068587A JP2013199196A JP 2013199196 A JP2013199196 A JP 2013199196A JP 2012068587 A JP2012068587 A JP 2012068587A JP 2012068587 A JP2012068587 A JP 2012068587A JP 2013199196 A JP2013199196 A JP 2013199196A
JP2012068587A
Kunihiro Nitawaki
邦浩 仁田脇
2012-03-26 Application filed by Suzuki Motor Corp, スズキ株式会社 filed Critical Suzuki Motor Corp
2012-03-26 Priority to JP2012068587A priority Critical patent/JP2013199196A/en
2013-10-03 Publication of JP2013199196A publication Critical patent/JP2013199196A/en
PROBLEM TO BE SOLVED: To protect a battery pack at the time of a rear-end collision of an electric car including the battery pack arranged between rear side members arranged in a rear part of the car.SOLUTION: In a battery pack mounting structure for electric cars, a pair of rear side members having a front portion, a rear portion, and a rising portion are arranged at both lateral sides, intermediate portions of the rear side members are coupled to each other with a cross member, and a battery pack is mounted on a vehicle body by a sub-frame to be coupled to the rear side members and the cross member. The cross member is arranged at a position lower than a bent portion that connects the rising portion and the rear portion of each of rear side members. The sub-frame includes a ring-like support frame that extends in a horizontal direction and surrounds an outer periphery of the battery pack. A front side portion and both lateral side portions of the support frame are coupled to the cross member and the rear portions of the rear side members, respectively, by coupling portions.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery pack mounting structure for an electric vehicle, and more particularly, to a battery pack mounting structure for an electric vehicle that protects a battery pack mounted on an electric vehicle that is driven by a driving force of a motor from an impact force during a rear collision About.
In an electric vehicle that runs with the driving force of a motor, it is necessary to increase the battery capacity in order to increase the running distance. At this time, as the battery capacity increases, the battery pack for storing the battery is large and heavy. For this reason, the battery pack is often mounted on the lower part of the vehicle or the rear part of the vehicle.
As a conventional battery pack mounting structure for an electric vehicle, Japanese Patent Application Laid-Open No. 2004-161158 discloses a structure in which a plurality of battery packs are mounted in the front-rear direction below the rear floor. On the other hand, it is described that the ground clearance is lowered.
In this publication, a mounting frame for mounting a battery pack on a vehicle body communicates between a front part extending in the vehicle front-rear direction and a rear part arranged higher than the front part and extending in the vehicle front-rear direction. It consists of a rising part that extends in the vertical direction of the vehicle, and the front part with the battery mounting surface on the front side is formed in a stepped shape in side view so as to lower the ground height with respect to the rear part with the battery mounting surface on the rear side. ing.
JP 2004-161158 A
However, in the above publication, since the mount frame for mounting the battery pack on the vehicle body is bent in the vehicle vertical direction at the middle part in the vehicle front-rear direction, when an impact force acts from the rear of the vehicle at the time of the vehicle rear collision, The mount frame is deformed in the vehicle vertical direction. For this reason, in the battery pack mounting structure of the above publication, it is difficult to sufficiently protect the battery pack with the mount frame.
In the above publication, both ends of the mount frame in the vehicle width direction are connected to a pair of rear side members extending in the vehicle front-rear direction. The rear side member includes a rising portion extending upward at an intermediate portion in the vehicle front-rear direction. Therefore, when an impact force is applied from the rear of the vehicle, the rear portion of the rising portion is deformed so as to protrude upward from the vehicle, and the length in the front-rear direction is shortened. For this reason, in the battery pack mounting structure of the above publication, the battery pack may move forward of the vehicle and come into contact with other in-vehicle components.
An object of the present invention is to protect a battery pack at the time of a vehicle rear collision in an electric vehicle in which a battery pack is disposed between rear side members disposed at the rear of the vehicle.
According to the present invention, a pair of rear side members, which extend in the vehicle front-rear direction and include a front portion, a rear portion disposed at a position higher than the front portion, and a rising portion that communicates between the two, are provided on both sides in the vehicle width direction. And an intermediate portion of each rear side member is connected to each other by a cross member extending in the width direction of the vehicle, and a battery pack is mounted on the vehicle body by a subframe connected to each rear side member and the cross member. In the battery pack mounting structure, the cross member is disposed at a position lower than a bent portion connecting the rising portion and the rear portion of each rear side member, and the subframe extends in the horizontal direction and surrounds the outer periphery of the battery pack. An annular support frame is provided, and both the front side of the support frame and the vehicle width direction The parts by respective connecting portions, characterized in that connected to the rear portion of the cross member and the respective rear side member.
In this invention, the sub-frame for mounting the battery pack on the vehicle body includes an annular support frame that extends in the horizontal direction and surrounds the outer periphery of the battery pack. For this reason, since the subframe does not have a vertical bending portion, when an impact force acts on the subframe in the vehicle front-rear direction, the subframe is difficult to bend in the vehicle vertical direction, and the length in the vehicle front-rear direction is long. It can be made into a shape that does not shrink easily.
And since the sub frame connected the front side part of the support frame to the cross member by the connecting part, when an impact force acts from the rear of the vehicle, the forward force acting on the support frame is caused to rise between the rising part and the rear part of the rear side member. It is transmitted to the cross member disposed at a position lower than the bent part to be communicated, and the rear side member can be prevented from being deformed at the bent part.
In addition, since the both sides of the support frame in the vehicle width direction are connected to the rear part of the rear side member by the connecting part, the sub frame can be reinforced by the support frame, and the vehicle can be used when the rear side member receives a vehicle longitudinal force. It can prevent bending up and down.
For this reason, it is possible to prevent the rear side member from being deformed at the bent portion that connects the rising portion and the rear portion at the time of a rearward collision of the vehicle, and the battery pack from colliding with the in-vehicle component disposed in front thereof.
Therefore, in this invention, the battery pack can be protected at the time of a vehicle rear collision with respect to the electric vehicle in which the battery pack is disposed between the rear side members disposed at the rear of the vehicle.
FIG. 1 is a side view of an electric vehicle. (Example) FIG. 2 is a bottom view of the rear part of the electric vehicle. (Example) FIG. 3 is a left side view of the rear part of the electric vehicle. (Example) FIG. 4 is an assembled perspective view of the battery pack and the subframe. (Example) FIG. 5 is a cross-sectional perspective view of the rear portion of the electric vehicle. (Example)
1 to 5 show an embodiment of the present invention. In FIG. 1, 1 is an electric vehicle, 2 is a vehicle body, 3 is an engine room, 4 is a passenger compartment, 5 is a luggage compartment, 6 is a front wheel, and 7 is a rear wheel. In the electric vehicle 1, a dash panel 8 extending in the vehicle width direction is disposed at the front portion of the vehicle body 2. In addition, as shown in FIG. 2, the electric vehicle 1 has a pair of front side members 9 and 10 extending in the vehicle front-rear direction on both sides in the width direction of the center of the vehicle body 2, and both sides in the width direction of the rear of the vehicle body 2. A pair of rear side members 11 and 12 extending in the vehicle front-rear direction are disposed in the portion.
The engine room 3 is formed on the front side of the dash panel 8 at the front of the vehicle body 2. A front floor panel 13 is attached to a pair of front side members 9 and 10 at the center of the vehicle body 2, and the vehicle compartment 4 is formed on the front floor panel 13. A rear floor panel 14 connected to the front floor panel 13 is attached to the pair of rear side members 11 and 12 at the rear of the vehicle body 2, and a part of the vehicle compartment 4 is formed at the front upper portion of the rear floor panel 14 and the rear side. The luggage compartment 5 is formed in the upper part.
In the engine room 3, an engine 15 for driving a generator is disposed. The front floor panel 13 is formed to be substantially flat, and a front seat 16 is disposed in the upper compartment 4. As shown in FIG. 3, the rear floor panel 14 includes a vertical wall portion 17 that rises upward from the rear end of the front floor panel 13, and a horizontal wall portion 18 that extends from the upper end of the vertical wall portion 17 to the vehicle rear side. The lateral wall 18 is attached to the rear panel 19 of the vehicle body 2 at the rear end. In the lateral wall portion 18, a rear seat 20 is disposed at the front upper portion, and a fuel tank 21 for storing the fuel of the engine 15 is disposed at the front lower portion. The luggage compartment 5 is formed on the upper portion of the lateral wall portion 18 between the rear seat 20 and the rear panel 19.
A filler pipe 22 extending from the lower side of the left rear side member 12 to the vehicle width direction outside is connected to the fuel tank 21. A filler cap 23 is detachably attached to the tip of the filler pipe 22.
As shown in FIG. 2, the electric vehicle 1 has the pair of rear side members 11, 12 extending in the vehicle front-rear direction at the rear part of the vehicle body 2 and arranged on both sides in the vehicle width direction. As shown in FIGS. 2 and 3, the right rear side member 11 includes a front part 24, a rear part 25 disposed at a higher position behind the front part 24, and a space between the front part 24 and the rear part 25. And a rising portion 26 that communicates with each other. A bent portion 27 that connects the rear end of the rising portion 26 and the front end of the rear portion 25 is provided at an intermediate portion of the right rear side member 11. As shown in FIG. 2, the left rear side member 12 communicates between the front portion 28, the rear portion 29 disposed at a higher position behind the front portion 28, and the front portion 28 and the rear portion 29. And a rising portion 30. A bent portion 31 that connects the rear end of the rising portion 30 and the front end of the rear portion 29 is provided at an intermediate portion of the left rear side member 12.
As shown in FIG. 3, the rear side members 11 and 12 are connected to each other by a cross member 32 extending in the vehicle width direction at the intermediate portion. One end of the cross member 32 is disposed at a position lower than the upper edge of the bent portion 27 that connects the rising portion 26 and the rear portion 25 of the right rear side member 11, and the other end is the rising portion of the left rear side member 12. 30 and the rear portion 29 are arranged at a position lower than the upper edge portion of the bent portion 31 that communicates with the rear portion 29. An intermediate portion of the lateral wall portion 18 of the rear floor panel 14 is attached to the cross member 32. The fuel tank 21 is disposed below the lateral wall portion 18 of the rear floor panel 14 in front of the cross member 32.
As shown in FIG. 2, the electric vehicle 1 has suspension arms 33 and 34 that extend in the vehicle front-rear direction below the rising portions 26 and 30 of the rear side members 11 and 12, respectively. The suspension arms 33 and 34 are coupled at the lower side of the cross member 32 by a suspension beam 35 and supported by swinging fulcrums 36 and 37 at the front end below the rising portions 26 and 30. Thus, the suspension arms 33 and 34 are integrally supported by the suspension beam 35 and supported by the rising portions 26 and 30 so that the rear end side thereof can be turned up and down around the swinging fulcrums 36 and 37.
As shown in FIGS. 2 and 3, the electric vehicle 1 has a battery pack 38 disposed at the rear portion of the vehicle body 2. The fuel tank 21 is disposed in front of the battery pack 38. The battery pack 38 is charged by a generator driven by the engine 15. An insertion hole 39 through which the battery pack 38 is inserted from below is formed in the lateral wall portion 18 of the rear floor panel 14 that forms the luggage compartment 5 on the rear side of the cross member 32. A cylindrical cover panel 40 surrounding the insertion hole 39 is attached to the upper side of the horizontal wall portion 18. A service lid 42 is detachably attached to the opening 41 at the upper end of the cover panel 40.
As shown in FIGS. 4 and 5, the battery pack 38 has a lower end of a coverless and bottomless rectangular tube-shaped upper cover 43 inserted through the insertion hole 39 and an upper end of a coverless and bottomed rectangular tube-shaped lower cover 44. By connecting, a storage space 45 is formed inside, and a plurality of batteries 46 are stored. The upper cover 43 is provided with an air cleaner 47 at the top, an exhaust duct 48 at the rear, and an extraction hole 50 for taking out the power line 49 at the front. The battery pack 38 is mounted on the vehicle body 2 by subframes 51 connected to the rear side members 11 and 12 and the cross member 32.
The subframe 51 includes an annular support frame 52 that extends in the horizontal direction and surrounds the outer periphery of the battery pack 38. The support frame 52 includes a pair of side member portions 53 and 54 extending in the direction along the rear side members 11 and 12, and a front member portion 55 and a rear member portion 56 extending in the vehicle width direction. The front member portion 55 has a pair of corner portions 57 and 58 extending obliquely rearward at both ends. The support frame 52 connects the corner portions 57 and 58 at both ends of the front member portion 55 to the front ends of the pair of side member portions 53 and 54, and both ends of the rear member portion 56 to the rear ends of the pair of side member portions 53 and 54. By connecting, it extends in the horizontal direction in a side view and is formed in a substantially trapezoidal square frame shape in a plan view.
The battery pack 38 includes a flange portion 59 that annularly surrounds a portion where the upper cover 43 and the lower cover 44 of the battery pack 38 are connected, and is connected to the support frame 52 of the subframe 51. The battery pack 38 is disposed at a position offset to one side of the pair of side member portions 53 and 54 in the vehicle width direction inside the support frame 52. In this embodiment, as shown in FIG. 2, it is arranged at a position offset to the left side member 54 side. The support frame 52 includes a front member portion 55 and a rear member portion 56 in a space S1 formed on the other side of the pair of side member portions 53 and 54 inside the support frame 52 due to the offset of the battery pack 38. A bracket 60 to be connected is arranged. In this embodiment, a bracket 60 that connects the corner portion 57 of the front member portion 55 and the rear member portion 56 is disposed in the space S1 along the right side member portion 53.
As shown in FIG. 4, the battery pack 38 has a lower cover 44 inserted into the support frame 52 from above, a bracket 60 along the right side member portion 53, a left side member portion 54, and a front member portion 55. The flange portion 59 is brought into contact with the rear member portion 56. The flange portion 59 is connected to the bracket 60, the left side member portion 54, the front member portion 55, and the rear member portion 56 by mounting bolts 61.
As shown in FIG. 5, the battery pack 38 connected to the support frame 52 is inserted into the space in the cover panel 40 by inserting the upper cover 43 through the insertion hole 39 formed in the lateral wall portion 18 from the lower side of the rear floor panel 14. The front member portion 55 that is the front side portion of the support frame 52 and the pair of side member portions 53 and 54 that are both sides in the vehicle width direction are respectively attached to the rear portions 25 and 29 and the cross member 32 of the rear side members 11 and 12. Make contact.
In this state, as shown in FIGS. 2 and 3, the front member portion 55 that is the front side portion of the support frame 52 and the pair of side member portions 53 and 54 that are both sides in the vehicle width direction are crossed by the connecting portions 62. The member 32 and the rear portions 25 and 29 of the rear side members 11 and 12 are connected. Accordingly, the battery pack 38 is mounted on the vehicle body 2 by the subframe 51 connected to the rear portions 25 and 29 of the rear side members 11 and 12 and the cross member 32.
Thus, the sub-frame 51 for mounting the battery pack 38 on the vehicle body 2 includes the annular support frame 52 that extends in the horizontal direction and surrounds the outer periphery of the battery pack 38. For this reason, since the sub-frame 51 does not include a vertical bending portion, when an impact force acts on the sub-frame 51 in the vehicle front-rear direction, the sub-frame 51 is unlikely to bend in the vehicle vertical direction. It can be made into a shape whose length is difficult to shrink.
And since the front member part 55 which is the front side part of the support frame 52 was connected to the cross member 32 by the connection part 62, the sub-frame 51 is supported when the impact force F acts from the vehicle rear as shown in FIG. A cross member 32 disposed at a position lower than the upper edge of the bent portions 27 and 31 connecting the rising portions 26 and 30 and the rear portions 25 and 29 of the rear side members 11 and 12 with a forward force acting on the frame 52. Thus, the rear side members 11 and 12 can be prevented from being deformed at the bent portions 27 and 31.
Further, the sub frame 51 has a pair of side member portions 53 and 54 that are both sides of the support frame 52 in the vehicle width direction and is connected to the rear portions 25 and 29 of the rear side members 11 and 12 by the connection portion 62. The rear side members 11 and 12 can be reinforced, and the rear side members 11 and 12 can be prevented from bending in the vehicle vertical direction when receiving a force in the vehicle longitudinal direction.
For this reason, at the time of a vehicle rear collision, the rear side members 11 and 12 are deformed by the bent portions 27 and 31 connecting the rising portions 26 and 30 and the rear portions 25 and 29, and the battery pack 38 is disposed in front thereof. Collisions with the rear seats 20 of the parts can be prevented.
Therefore, in the present invention, the battery pack 38 can be protected at the time of a rearward collision of the electric vehicle 1 in which the battery pack 38 is disposed between the rear side members 11 and 12 disposed at the rear of the vehicle.
The battery pack 38 includes a flange portion 59 that surrounds the battery pack 38 in an annular shape and is connected to the support frame 52 of the subframe 51.
Thus, since the battery pack 38 can be directly connected to the support frame 52 by the structure including the flange portion 59 connected to the support frame 52 of the subframe 51, the weight of the battery pack 38 at the time of a vehicle rearward collision is reduced. It is possible to prevent the heavy battery packs 38 from moving forward relative to the support frame 52 and colliding with each other.
As shown in FIG. 4, the support frame 52 of the sub-frame 51 includes a pair of side member portions 53, 54, a front member portion 55, and a rear member portion 56. The battery pack 38 is disposed inside the support frame 52 at a position offset to the left side member portion 54 side of the pair of side member portions 53 and 54 in the vehicle width direction. Due to the offset of the battery pack 38, a space S <b> 1 is formed on the right side member 53 side of the pair of side member portions 53 and 54 inside the support frame 52. A bracket 60 for connecting the front member portion 55 and the rear member portion 56 is disposed in the space S1.
Thus, the battery pack 38 is disposed at a position offset to one side (left side in FIG. 2) in the vehicle width direction on the inner side of the support frame 52, whereby the other side of the battery pack 38 in the vehicle width direction (FIG. 2). A space S1 is formed on the right side), and an exhaust pipe 63 or the like connected to the engine 15 that drives the generator can be disposed in the space S1.
At this time, since the bracket 60 for connecting the front member portion 55 and the rear member portion 56 is disposed in the space S <b> 1 formed inside the support frame 52 by offsetting the battery pack 38, the support frame 52 is reinforced by the bracket 60. The structure can be made difficult to be deformed by the impact force in the vehicle longitudinal direction.
As shown in FIG. 3, a filler pipe 22 extending outward from the rear side members 11 and 12 in the vehicle width direction is connected to the fuel tank 21 disposed in front of the battery pack 38. As shown in FIG. 1, the filler pipe 22 passes through the space S <b> 2 sandwiched between the rear portion 29 of the left rear side member 12 and the left side member portion 54 of the support frame 52 in the vehicle vertical direction, so that the left rear side member 12. It extends to the outside in the vehicle width direction.
Thus, in the case of the electric vehicle 1 in which the fuel tank 21 is mounted in addition to the battery pack 38, the filler pipe 22 connected to the fuel tank 21 is prevented from being deformed by the support frame 52 of the subframe 51 at the time of a vehicle rear collision. Since it arrange | positions in space S2, the filler piping 22 can be protected from a collision with another component.
The present invention protects a battery pack at the time of a vehicle rear collision with respect to an electric vehicle in which a battery pack is disposed between rear side members disposed at the rear of the vehicle. The present invention can also be applied to a vehicle in which vehicle parts that need to be arranged are arranged.
DESCRIPTION OF SYMBOLS 1 Electric vehicle 2 Car body 9.10 Front side member 11.12 Rear side member 13 Front floor panel 14 Rear floor panel 15 Engine 17 Vertical wall part 18 Horizontal wall part 19 Rear panel 20 Rear seat 21 Fuel tank 22 Filler piping 24 Front part 25 Rear part 26 Standing up Part 27 Bending part 28 Front part 29 Rear part 30 Rising part 31 Bending part 32 Cross member 38 Battery pack 39 Insertion hole 40 Cover panel 41 Service lid 43 Upper cover 44 Lower cover 45 Storage space 46 Battery 51 Subframe 52 Support frame 53 54 Side member portion 55 Front member portion 56 Rear member portion 57/58 Corner portion 59 Flange portion 60 Bracket 61 Mounting bolt 62 Connection portion
A pair of rear side members that extend in the vehicle front-rear direction and that includes a front portion, a rear portion that is disposed at a position higher than the front portion, and a rising portion that communicates between the two are disposed on both sides in the vehicle width direction, A battery pack mounting structure for an electric vehicle in which intermediate portions of the rear side members are connected to each other by a cross member extending in the vehicle width direction, and a battery pack is mounted on the vehicle body by a subframe connected to the rear side members and the cross member. The cross member is disposed at a position lower than the bent portion that connects the rising portion and the rear portion of each rear side member, and the sub-frame extends in the horizontal direction and surrounds the outer periphery of the battery pack. The front side of the support frame and both sides in the vehicle width direction are connected to each other. Said cross member and said battery pack mounting structure for an electric vehicle characterized by being connected to the rear portion of the rear side members by parts.
2. The battery pack mounting structure for an electric vehicle according to claim 1, wherein the battery pack includes a flange portion that surrounds the battery pack in an annular shape and is connected to a support frame of the subframe.
The support frame includes a pair of side member portions extending in a direction along the rear side members, a front member portion and a rear member portion extending in the vehicle width direction, and the battery pack is arranged in the vehicle width direction inside the support frame. The front member is disposed at a position offset to one side of the pair of side member portions, and is formed in a space formed on the other side of the pair of side member portions inside the support frame by the offset of the battery pack. The battery pack mounting structure for an electric vehicle according to claim 1 or 2, wherein a bracket for connecting the member portion and the rear member portion is disposed.
A fuel tank is disposed in front of the battery pack, a filler pipe extending outward in the vehicle width direction from the rear side member is connected to the fuel tank, and the filler pipe is sandwiched between the rear side member and the support frame in the vehicle vertical direction. The battery pack mounting structure for an electric vehicle according to claim 1, wherein the battery pack mounting structure extends outward from the rear side member in the vehicle width direction.
JP2012068587A 2012-03-26 2012-03-26 Battery pack mounting structure for electric car Pending JP2013199196A (en)
JP2012068587A JP2013199196A (en) 2012-03-26 2012-03-26 Battery pack mounting structure for electric car
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JP2013199196A true JP2013199196A (en) 2013-10-03
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