JP5708567B2 - Battery mounting structure for vehicles - Google Patents

Description

  The present invention relates to a vehicle battery mounting structure.

  A vehicle body structure of an electric vehicle that includes a pair of left and right main frames and a plurality of cross members that connect the pair of left and right main frames in the vehicle width direction and supports a battery below the vehicle floor (for example, patents) Reference 1).

  In addition, a battery side frame (side frame) disposed inside the rocker (side sill) in the vehicle width direction and a spacer disposed between the battery side frame and the rocker are provided to support the battery below the vehicle floor. A battery frame mounting structure for an electric vehicle is known (for example, Patent Document 2).

  The technique disclosed in Patent Document 2 is configured to absorb side collision energy (collision energy) by collapsing the spacer toward the battery side frame during a vehicle side collision (hereinafter simply referred to as “side collision”). ing.

Japanese Patent Laid-Open No. 10-138956 JP 7-246845 A

  However, in the technique disclosed in Patent Document 2, the battery side frame and the spacer are not connected. Therefore, at the time of a side collision, the spacer is easily displaced in the vehicle vertical direction with respect to the battery side frame, and the spacer is not easily crushed. Therefore, there is a possibility that the absorption amount of the side collision energy of the spacer is lowered.

  In consideration of the above-described facts, an object of the present invention is to provide a vehicle battery mounting structure capable of suppressing a decrease in the amount of side impact energy absorbed by an impact absorbing member.

  The vehicle battery mounting structure according to claim 1 is disposed below the vehicle floor on both sides of the vehicle, and is disposed between a pair of impact absorbing members extending in the vehicle front-rear direction and the pair of impact absorbing members. A battery cross frame portion for connecting the pair of shock absorbing members and supporting the battery, and a cover formed on a connecting portion between the pair of shock absorbing members and an end portion of the battery cross frame portion in the vehicle width direction. And an engaging portion formed at the end of the battery cross frame portion and engaged with the engaged portion in the vehicle vertical direction.

  According to the vehicle battery mounting structure of the first aspect, the engaged portions are respectively formed in the connecting portions of the pair of impact absorbing members with the end portions in the vehicle width direction of the battery cross frame portion. On the other hand, an engagement portion is formed at the end of the battery cross frame portion in the vehicle width direction. The engaging portion is engaged with the engaged portion in the vehicle vertical direction.

  As a result, the connection strength between the impact absorbing member and the battery cross frame portion against bending in the vehicle vertical direction is increased. As a result, when a side impact load is input to the battery side with respect to the impact absorbing member, the side impact load is easily transmitted from the impact absorbing member to the end of the battery cross frame portion. That is, the impact absorbing member takes a reaction force at the end of the battery cross frame portion and is easily crushed toward the battery side.

  The vehicle battery mounting structure according to claim 2 is the vehicle battery mounting structure according to claim 1, wherein the engaged portion has an insertion port that is opened toward the inside in the vehicle width direction. The engaging portion is inserted into the engaged portion from the insertion port and engaged with the engaged portion.

  According to the vehicle battery mounting structure according to claim 2, the engaging portion formed at the end of the battery cross frame portion in the vehicle width direction is inserted into the engaged portion formed at the connecting portion of the shock absorbing member. Then, the engaging portion is engaged with the engaged portion in the vertical direction of the vehicle. Therefore, the engaging portion and the engaged portion can be easily engaged.

  The vehicle battery mounting structure according to claim 3 is the vehicle battery mounting structure according to claim 1 or 2, wherein the cross-sectional shape of the end portion of the battery cross frame portion viewed from the vehicle width direction is closed. The cross-sectional shape is connected to the inner end portion of the connecting portion located on the inner side in the vehicle width direction of the shock absorbing member, and the engaged portion includes an upper wall surface of the inner end portion and Each of the engaging portions is formed on an upper edge portion and a lower edge portion of the opening formed in the end portion of the battery cross frame portion.

  According to the vehicle battery mounting structure according to the third aspect, the engaging portions are respectively formed on the upper edge portion and the lower edge portion of the opening formed at the end portion of the battery cross frame portion. These engaging portions are engaged in the vehicle vertical direction with engaged portions respectively formed on the upper wall surface and the lower wall surface of the inner end portion of the shock absorbing member. In other words, the engaging portions formed respectively at the upper edge portion and the lower edge portion of the end portion of the battery cross frame portion are disposed on both sides in the vehicle vertical direction of the inner end portion of the shock absorbing member. Thereby, the connection strength between the impact absorbing member and the battery cross frame portion against bending in the vehicle vertical direction is further enhanced. As a result, the side impact load is more easily transmitted from the impact absorbing member to the end portion of the battery cross frame portion at the time of the side impact.

  The vehicle battery mounting structure according to claim 4 is the vehicle battery mounting structure according to claim 3, wherein the inner end portion of the shock absorbing member is formed at the upper edge portion and the lower edge portion. Further, a protruding portion protruding between the engaging portions is formed.

  According to the vehicle battery mounting structure of the fourth aspect, the inner end portion of the shock absorbing member protrudes between the engaging portions formed at the upper edge portion and the lower edge portion of the opening of the battery cross frame portion. A protrusion is formed. By this protruding portion, the connection strength between the impact absorbing member and the battery cross frame portion against bending in the vehicle vertical direction is further increased. In addition, the protrusions prevent the end of the battery cross frame portion in the vehicle width direction from being crushed during a side collision. Therefore, a side collision load is more easily transmitted from the impact absorbing member to the end of the battery cross frame portion at the time of a side collision.

  The vehicle battery mounting structure according to claim 5 is the vehicle battery mounting structure according to claim 4, provided on the lower wall surface of the vehicle floor in the vehicle width direction of the battery and extending in the vehicle front-rear direction. A floor side member lower disposed above the shock absorbing member, wherein the inner end of the shock absorbing member is disposed on the inner side in the vehicle width direction than the floor side member lower, and an upper portion of the floor side member lower is disposed on the floor side. Adjacent to the member lower in the vehicle width direction, the end portion of the battery cross frame is connected to the lower portion, and the upper wall surface of the inner end portion inclines so as to go upward as it goes outward in the vehicle width direction. The upper wall portion of the battery cross frame portion is curved so as to face upward as it goes outward in the vehicle width direction, and the end side is Curved portion coupled to the inclined surface from the serial top edge extends outward in the vehicle width direction is formed.

  According to the vehicle battery mounting structure of the fifth aspect, the inner end portion of the shock absorbing member is arranged on the inner side in the vehicle width direction with respect to the floor side member lower, and the end portion of the battery cross frame portion is located below the lower end member lower. It is connected. The upper part of the inner end of the shock absorbing member is adjacent to the floor side member lower in the vehicle width direction. Therefore, at the time of a side collision, the upper part of the inner end portion of the shock absorbing member is pressed toward the battery by the floor side member lower. At this time, when the upper portion of the inner end portion of the impact absorbing member is crushed, the side collision energy is absorbed.

  Here, the upper wall surface of the inner end portion of the shock absorbing member is an inclined surface that is inclined so as to be directed upward as it goes outward in the vehicle width direction. On the other hand, the curved portion formed on the upper wall portion of the battery cross frame portion is curved so as to face upward as it goes outward in the vehicle width direction, and its end side extends from the upper edge portion of the opening portion in the vehicle width direction. Is extended to the outer side of the shock absorbing member and is coupled to the inclined surface of the inner end portion of the shock absorbing member. Accordingly, when the upper part of the inner end portion of the shock absorbing member is pressed toward the battery side by the floor side member lower at the time of a side collision, the battery passes through the inclined surface and the curved portion from the upper portion of the inner end portion of the shock absorbing member. A side impact load is transmitted to the end of the cross frame portion. As a result, the upper part of the inner end portion of the shock absorbing member is easily crushed.

  The vehicle battery mounting structure according to claim 6 is the vehicle battery mounting structure according to claim 5, wherein a tip portion of the protruding portion in the protruding direction is a vehicle upper and lower portion at a central portion in the vehicle width direction of the curved portion. Located below the direction.

  According to the vehicle battery mounting structure of the sixth aspect, the leading end portion of the projecting portion in the projecting direction is located on the lower side in the vehicle vertical direction of the center portion of the bending portion in the vehicle width direction. Thus, when the bending portion is crushed downward, the center portion of the bending portion in the vehicle width direction is supported by the tip portion of the protruding portion.

  The vehicle battery mounting structure according to claim 7 is the vehicle battery mounting structure according to any one of claims 1 to 6, wherein the battery cross frame portion is interposed between the pair of shock absorbing members. Is attached to the car body.

  According to the vehicle battery mounting structure of the seventh aspect, by attaching the battery cross frame portion to the vehicle body via the pair of shock absorbing members, for example, the pair of shock absorbing members and the battery cross frame portion are separately separated from the vehicle body. Compared to the case of attaching to the vehicle body, labor for attaching the shock absorbing member and the battery cross frame portion to the vehicle body is reduced.

  Moreover, when attaching a pair of impact-absorbing member and a battery cross frame part separately to a vehicle body, the clearance gap for absorbing an attachment error etc. is needed between an impact-absorbing member and a battery cross frame part. Therefore, at the time of a side collision, the impact absorbing member is easily displaced in the vehicle vertical direction with respect to the end portion of the battery cross frame portion, and the side impact load is hardly transmitted from the impact absorbing member to the end portion of the battery cross frame portion.

  On the other hand, in the present invention, the battery cross frame portion is attached to the vehicle body via a pair of impact absorbing members. That is, the battery cross frame portion is attached to the vehicle body in a state where it is connected to the pair of impact absorbing members. This eliminates the need for a gap between the end of the battery cross frame and the shock absorbing member. Therefore, a side collision load is easily transmitted from the impact absorbing member to the end of the battery cross frame portion at the time of a side collision.

  The vehicle battery mounting structure according to claim 8 is the vehicle battery mounting structure according to any one of claims 1 to 7, wherein the battery cross frame portion has an open cross-sectional shape with an open bottom. A cross frame main body portion, and a cover portion that is disposed below the cross frame main body portion and forms a closed cross-section together with the cross frame main body portion, the cross frame main body portion being formed of resin, The shock absorbing member is made of resin or metal.

  According to the vehicle battery mounting structure according to claim 8, by forming the cross frame main body portion and the shock absorbing member with resin, compared to the configuration in which these cross frame main body portion and the shock absorbing member are formed with metal, It is possible to reduce the weight of the cross frame main body and the shock absorbing member.

  Further, by forming the cross frame main body portion from resin and the impact absorbing member from metal, the impact energy absorbing performance of the shock absorbing member can be improved while reducing the weight of the cross frame main body portion. In this case, the cross frame main body and the shock absorbing member are formed of different materials, but formed at the end of the battery cross frame at the engaged portion formed at the connecting portion of the shock absorbing member. By engaging the engaged portion in the vehicle vertical direction, the connection strength between the shock absorbing member and the end of the battery cross frame portion against bending in the vehicle vertical direction can be ensured.

  According to the vehicle battery mounting structure of the first aspect, it is possible to suppress a decrease in the amount of side impact energy absorbed by the impact absorbing member.

  According to the vehicle battery mounting structure of the second aspect, it is possible to improve the workability of the connecting work between the end of the battery cross frame portion and the impact absorbing member.

  According to the vehicle battery mounting structure of the third aspect, it is possible to further suppress a decrease in the amount of side impact energy absorbed by the impact absorbing member.

  According to the vehicle battery mounting structure of the fourth aspect, the integrity of the end of the battery cross frame portion and the shock absorbing member can be improved.

  According to the vehicle battery mounting structure of the fifth aspect, the side collision energy can be efficiently absorbed at the upper part of the inner end portion of the impact absorbing member.

  According to the vehicle battery mounting structure of the sixth aspect, it is possible to efficiently suppress the downward crushing of the bending portion.

  According to the vehicle battery mounting structure of the seventh aspect of the present invention, it is possible to suppress a reduction in the amount of side impact energy absorbed by the impact absorbing member while improving the workability of attaching the battery cross frame portion and the impact absorbing member to the vehicle body. be able to.

  According to the vehicle battery mounting structure of the eighth aspect, the weight of the battery cross frame portion and the like is reduced while securing the connection strength between the impact absorbing member and the end of the battery cross frame portion against bending in the vehicle vertical direction. be able to.

It is sectional drawing which looked at the vehicle body floor part to which the vehicle battery mounting structure concerning 1st Embodiment of this invention was applied from the rear side of the vehicle front-back direction. It is a division | segmentation perspective view which shows the battery frame and impact absorption member in 1st Embodiment of this invention. It is an expanded sectional view of FIG. 1 which shows the connection part of the battery frame and impact absorption member in 1st Embodiment of this invention. It is a disassembled perspective view which shows the connection part of the battery frame and impact absorption member in 1st Embodiment of this invention. It is sectional drawing which looked at the vehicle body floor part to which the vehicle battery mounting structure concerning 2nd Embodiment of this invention was applied from the rear side of the vehicle front-back direction.

  Hereinafter, a vehicle battery mounting structure according to an embodiment of the present invention will be described with reference to the drawings. It should be noted that an arrow FR appropriately shown in each figure indicates the front side in the vehicle longitudinal direction, an arrow UP indicates an upper side in the vehicle vertical direction, and an arrow OUT indicates an outer side in the vehicle width direction. In the following description, the vehicle front-rear direction may be simply abbreviated as front-rear, and the vehicle vertical direction may be abbreviated simply as up-down.

  First, the vehicle battery mounting structure according to the first embodiment will be described.

  FIG. 1 shows a vehicle body floor 12 to which a vehicle battery mounting structure 10 according to this embodiment is applied. This vehicle is, for example, an electric vehicle, a gasoline hybrid vehicle, a fuel cell hybrid vehicle, or the like that travels by using an electric motor (motor) (not shown) as a drive source, and is directed to the electric motor below the vehicle vertical direction of the floor panel 16 constituting the vehicle floor. A battery unit 14 is mounted as a battery for storing supplied power. In addition, the vehicle body floor part 12 is comprised substantially symmetrically with respect to the center part of the vehicle width direction. Therefore, in the following, the configuration of the right half of the vehicle body floor 12 will be described in detail, and the description of the configuration of the left half of the vehicle body floor 12 will be omitted as appropriate.

  The floor panel 16 is formed of a steel plate and is provided from one end side to the other end side of the vehicle body floor portion 12 in the vehicle width direction. A floor tunnel portion 18 is formed at the center of the floor panel 16 in the vehicle width direction so as to bulge upward in the vehicle vertical direction and open on the lower side. A battery unit 14 is disposed below the floor tunnel portion 18. The battery unit 14 includes a plurality of rechargeable battery modules (secondary batteries) and is supported by a battery frame 50 described later.

  A pair of rockers 20 extending in the vehicle front-rear direction are provided at both ends of the floor panel 16 in the vehicle width direction. The pair of rockers 20 is a skeleton member that forms a lower skeleton on both sides of the vehicle, and is provided along both ends of the floor panel 16 in the vehicle width direction. Each of the rockers 20 has a closed cross-sectional shape as viewed from the vehicle front-rear direction, a rocker outer panel 22 disposed on the outer side in the vehicle width direction, and a rocker inner panel 24 disposed on the inner side in the vehicle width direction. have.

  The rocker outer panel 22 is formed in a cross-sectional hat shape with an inner side in the vehicle width direction opened. On the other hand, the rocker inner panel 24 is formed in a cross-sectional hat shape that is open on the outside in the vehicle width direction. The rocker outer panel 22 and the rocker inner panel 24 are joined by welding or the like in a state where the flange portions 22A and 24A are overlapped with each other. Each rocker outer panel 22 and the rocker inner panel 24 are appropriately reinforced by reinforcing panels 26 and 28. Further, an impact absorbing member 80 described later is attached to the rocker outer panel 22.

  A pair of floor side members 30 extending in the vehicle front-rear direction are provided on the inner side of the pair of rockers 20 in the vehicle width direction. The floor side member 30 is a skeleton member that constitutes the skeleton of the vehicle, and is provided between the rocker 20 and the floor tunnel portion 18 in the floor panel 16 along the vehicle front-rear direction. The floor side member 30 is located on the rear side of a front side member (not shown) provided in the front portion of the vehicle. The floor side member 30 has a closed cross-sectional shape as viewed from the vehicle front-rear direction. The floor side member 30 is disposed below the floor panel 16 and a floor side member upper 32 disposed above the floor panel 16. And a floor side member lower 34.

  The floor side member upper 32 is formed in a cross-sectional hat shape whose lower side (floor panel 16 side) is open, and is joined by welding or the like in a state where the flange portion 32A is superimposed on the upper surface of the floor panel 16. . On the other hand, the floor side member lower 34 is formed in a cross-sectional hat shape with the upper side (floor panel 16 side) opened, and the flange portion 34A sandwiches the floor panel 16 on the flange portion 32A of the floor side member upper 32, respectively. They are joined by welding or the like in a superposed state. The floor side member lower 34 is provided outside the battery unit 14 in the vehicle width direction on the lower wall surface of the floor panel 16.

  Further, the floor side member upper 32 and the rocker 20 are connected by a connecting member 36. The connecting member 36 supports the rocker 20 with respect to the floor side member upper 32, and is connected to the floor side member upper 32 and the rocker inner panel 24 by bolts 38 and weld nuts 40, respectively.

  A battery frame 50 that supports the battery unit 14 described above is disposed inside the floor side member lower 34 in the vehicle width direction and below the floor panel 16. The battery unit 14 is placed on an intermediate portion of the battery frame 50 in the vehicle width direction, and the battery unit 14 is fixed to the battery frame 50 by bolts, nuts, and the like (not shown).

  Further, an intermediate portion of the battery frame 50 in the vehicle width direction is disposed below the floor side member lower 34 in the vehicle vertical direction. Thereby, the mounting space for the battery unit 14 between the battery frame 50 and the floor panel 16 is widened.

  As shown in FIG. 2, the battery frame 50 includes a grid-like body 60 and an under cover 70 serving as a cover portion disposed below the grid-like body 60 in the vehicle vertical direction. The lattice-shaped body 60 is formed of resin and is formed in a lattice shape as a whole when viewed from the vehicle vertical direction.

  On the other hand, the under cover 70 is formed of a metal in a plate shape, and is bonded to the lower surface of the grid-like body 60 by adhesion or welding. The under cover 70 covers the entire lower surface of the battery unit 14 (see FIG. 1) from the lower side, so that intrusion of rainwater or the like into the battery unit 14 side is suppressed.

  In the present embodiment, as an example, the lattice-like body 60 is formed of CFRP (Carbon Fiber Reinforced Plastics). For example, the lattice-like body 60 is formed of FRP (Fiber Reinforced Plastics). Alternatively, it may be formed of other resin or the like. The under cover 70 is formed of aluminum as an example, but can be formed of other metals such as steel and iron.

  The battery frame 50 includes a plurality of (four in this embodiment) cross frame portions 52 as a plurality of battery cross frame portions, a plurality of (two in this embodiment) connecting frame portions 54, and a curved frame portion. 56.

  Specifically, the lattice-shaped body 60 includes a cross frame main body portion 62 that forms a skeleton of the cross frame portion 52, a connection frame main body portion 64 that forms a skeleton of the connection frame portion 54, and a skeleton of the curved frame portion 56. It has a curved frame main body 66 that constitutes it.

  The plurality of cross frame main body portions 62 extend in the vehicle width direction and are spaced from each other in the vehicle front-rear direction. Each cross frame main body portion 62 is formed in a cross-sectional hat shape (open cross-sectional shape) opened at the lower side in the vehicle vertical direction, and the under cover 70 is coupled to the flange portion 62A. The cross frame portion 52 having a cross-sectional shape viewed from the vehicle width direction as a closed cross-sectional shape is configured by a part of the cross frame main body 62 and the under cover 70.

  Further, the intermediate portion in the longitudinal direction of the cross frame main body 62 is connected by a plurality of connecting frame main bodies 64. The plurality of connecting frame main body portions 64 extend in the vehicle front-rear direction and are arranged at intervals in the vehicle width direction. Each connection frame main body 64 is formed in a cross-sectional hat shape (open cross-sectional shape) that is open at the lower side in the vehicle vertical direction, and the under cover 70 is coupled to the flange portion 64A. The connection frame main body 64 and a part of the under cover 70 constitute a connection frame portion 54 having a closed cross-sectional shape as viewed from the vehicle front-rear direction.

  Further, among the plurality of cross frame main body portions 62, the cross frame main body portion 62 disposed on the front end side is provided with a curved frame main body portion 66 that is curved in a convex shape toward the front side. The curved frame main body 66 is formed in a cross-sectional hat shape (open cross-sectional shape) that is open on the lower side in the vehicle vertical direction, and the under cover 70 is coupled to the flange portion 66A. The curved frame main body 66 and a part of the under cover 70 constitute a curved frame portion 56 whose sectional shape viewed from the vehicle width direction is a closed sectional shape.

  The battery frame 50 thus configured is attached to the rocker 20 and the floor side member lower 34 constituting the vehicle body via a pair of impact absorbing members 80 connected to both ends in the vehicle width direction. As shown in FIG. 1, the pair of impact absorbing members 80 are disposed along the vehicle front-rear direction below the floor panel 16 on both sides of the vehicle.

  Each impact absorbing member 80 is formed of an aluminum extrusion-molded product, and is arranged with the vehicle longitudinal direction as the longitudinal direction. The impact absorbing member 80 is formed in a cylindrical shape having a substantially rectangular cross section with the long side in the vehicle width direction as a whole, and is disposed across the rocker 20 and the floor side member lower 34. In the present embodiment, as an example, the impact absorbing member 80 is made of aluminum, but it may be made of another metal having energy absorbing performance.

  A flange portion 82 extending outward in the vehicle width direction is formed on the outer side in the vehicle width direction of the impact absorbing member 80. A lower end portion of a rocker outer molding 72 that covers the rocker 20 from the outside in the vehicle width direction is attached to the flange portion 82 by a clip 74.

  The inside of the impact absorbing member 80 is partitioned in the vehicle width direction by a plurality of vertical partition walls 84 extending in the vehicle vertical direction. As a result, a plurality of (four in this embodiment) absorbing portions 86 arranged in the vehicle width direction are formed in the impact absorbing member 80. Each absorber 86 has a closed cross-sectional shape as viewed in the vehicle front-rear direction. Hereinafter, for convenience of explanation, the plurality of absorbing portions 86 will be described as absorbing portions 86A, 86B, 86C, 86D in order from the inside in the vehicle width direction.

  The upper part of the absorption part 86B located in the intermediate part in the vehicle width direction is opened, and a groove part 88 extending in the vehicle front-rear direction is formed between the absorption part 86A and the absorption part 86C adjacent to each other in the vehicle width direction. . The floor side member lower 34 is inserted into the groove portion 88, and the bottom wall portion (upper wall portion of the absorbing portion 86 B) 88 A of the groove portion 88 is connected to the bolt 42 and the weld nut 44 on the lower wall portion 34 B of the floor side member lower 34. Are coupled from below. As a result, the upper portion of the absorbing portion 86A is disposed inside the floor side member lower 34 in the vehicle width direction, and the upper portion of the absorbing portion 86C and the upper portion of the absorbing portion 86D are positioned outside the floor side member lower 34 in the vehicle width direction. Has been placed. A work hole 90 into which the bolt 42 is inserted is formed in the lower wall portion of the absorbing portion 86B.

  Further, the absorbing portion 86D located outside the vehicle width direction is disposed below the rocker 20, and its upper wall portion is coupled to the lower wall portion 22B of the rocker outer panel 22 from below by a bolt 46 and a weld nut 48. ing. A work hole 92 into which the bolt 46 is inserted is formed in the lower wall portion of the absorbing portion 86D and a lateral partition wall portion 94 to be described later.

  Further, the absorbing portions 86A, 86C, 86D excluding the absorbing portion 86B are partitioned in the vehicle vertical direction by a horizontal partition wall portion 94 extending in the vehicle width direction. The proof stress (collapse strength) of these absorbing portions 86 </ b> A to 86 </ b> D is such that when the side impact load F is input to the battery unit 14 side (inner side in the vehicle width direction) with respect to the shock absorbing member 80, the shock absorbing member 80. The absorber 86D, the absorber 86C, the absorber 86A, and the absorber 86B are set so as to be crushed in this order.

  Specifically, a bead 96 extending in the vehicle front-rear direction is appropriately formed in the upper wall portion 80U, the lower wall portion 80L, and the horizontal partition wall portion 94 of the impact absorbing member 80. Moreover, the plate | board thickness of the upper wall part 80U of the impact-absorbing member 80, the lower wall part 80L, and the horizontal partition part 94 is set to the different value between absorption parts 86A-86D. Thereby, the proof stress becomes large in order of the absorption part 86D, the absorption part 86C, the absorption part 86A, and the absorption part 86B (absorption part 86D <absorption part 86C <absorption part 86A <absorption part 86B).

  Note that a high-strength floor side member lower 34 is disposed above the absorbing portion 86B. In this case, if the absorbing portion 86B is crushed before the absorbing portion 86A, the side impact load is hardly transmitted from the absorbing portion 86C to the absorbing portion 86A. Therefore, the proof stress of the absorption part 86B is set to be larger than the proof stress of the absorption part 86A, and the absorption part 86A is configured to be crushed before the absorption part 86B.

  Here, a connection structure between the battery frame 50 and the shock absorbing member 80 will be described.

  As shown in FIG. 1, the inner end portion 100 (absorbing portion 86A) located inside the vehicle width direction of the shock absorbing member 80 is in contact with the end portion 52T of the cross frame portion 52 in the vehicle width direction (longitudinal direction). It is a connecting part. The inner end portion 100 of the shock absorbing member 80 is configured by the absorbing portion 86A described above, and is disposed on the inner side in the vehicle width direction with respect to the floor side member lower 34, and the upper portion thereof is the floor side member lower 34 and the vehicle. Adjacent in the width direction. Further, the lower part of the inner end portion 100 of the impact absorbing member 80 is disposed below the floor side member lower 34 in the vehicle vertical direction.

  As shown in FIG. 3, the upper wall surface 100U of the inner end portion 100 of the shock absorbing member 80 is an inclined surface that is inclined with respect to the vehicle width direction so as to go upward as it goes outward in the vehicle width direction. . An upper engaged portion 102 extending along the longitudinal direction of the shock absorbing member 80 is formed on the upper wall surface 100U of the inner end portion 100. The upper engaged portion 102 includes a base portion 104 that protrudes upward in the vehicle vertical direction from the upper wall surface 100U of the inner end portion 100, and extends from the upper end portion of the base portion 104 to the inner side in the vehicle width direction. It has a facing portion 106 facing the wall surface 100U. Between the front-end | tip part of the extension direction of this opposing part 106, and the upper wall surface 100U of the inner side edge part 100, the insertion port 108 in which the upper side engaging part 122 mentioned later is inserted is formed.

  A lower engaged portion 112 extending along the longitudinal direction of the shock absorbing member 80 is formed on the lower wall surface 100L of the inner end portion 100 of the shock absorbing member 80. The lower engaged portion 112 extends from the lower wall surface 100L of the inner end portion 100 to the lower side in the vehicle vertical direction, and extends from the lower end portion of the base portion 114 to the inner side in the vehicle width direction. And a facing portion 116 facing the lower wall surface 100L. Between the front-end | tip part of the extension direction of this opposing part 116, and the lower wall surface 100L of the inner side edge part 100, the insertion port 118 in which the lower side engaging part 124 mentioned later is inserted is formed.

  On the other hand, the end portion 52T of the cross frame portion 52 is abutted against the lower portion of the inner end portion 100 of the shock absorbing member 80. An opening 58 is formed at the end 52T of the cross frame portion 52. As shown in FIG. 4, flange portions 120 extending outward are formed on the side edges on both sides of the opening 58. These flange portions 120 are joined together by bonding or welding in a state where they are overlapped with the lower portion of the inner end portion 100 of the shock absorbing member 80.

  In addition, a curved portion 76 that curves upward as it goes outward in the vehicle width direction is formed on the upper wall portion 52U of the cross frame portion 52. As shown in FIG. 3, the end side of the curved portion 76 (the outer portion in the vehicle width direction) extends from the upper edge portion 58U of the opening 58 to the outer side in the vehicle width direction, and absorbs shock. The members 80 are joined to each other by bonding or welding in a state of being overlapped on the upper wall surface 100U of the inner end portion 100. An upper engagement portion 122 is formed at the outer end of the curved portion 76 in the vehicle width direction. The upper engaging portion 122 is inserted into the upper engaged portion 102 from the insertion port 108 described above, and is engaged with the facing portion 106 of the upper engaged portion 102 in the vehicle vertical direction. .

  On the other hand, the outer end portion of the under cover 70 constituting the lower wall portion 52L of the cross frame portion 52 in the vehicle width direction is from the lower edge portion 58L of the opening 58 to the lower wall surface 100L of the inner end portion 100 of the shock absorbing member 80. Are extended to the outside in the vehicle width direction, and are joined together by adhesion or welding in a state of being superimposed on the lower wall surface 100L of the inner end portion 100. A lower engagement portion 124 is formed at the outer end of the under cover 70 in the vehicle width direction. The lower engagement portion 124 is inserted into the lower engaged portion 112 from the insertion port 118 described above, and is engaged with the opposing portion 116 of the lower engaged portion 112 in the vehicle vertical direction. Has been.

  A projecting portion 130 that projects inward in the vehicle width direction is provided below the inner end portion 100 of the impact absorbing member 80. The projecting portion 130 is formed in a substantially U-shaped cross section with an outer side in the vehicle width direction opened, and a pair of upper and lower opening-side end portions are coupled to the lower portion of the inner end portion 100 by welding. The protruding portion 130 is formed between an upper engaging portion 122 and a lower engaging portion 124 that are formed from the lower portion of the inner end portion 100 to the upper edge portion 58U and the lower edge portion 58L of the opening 58 of the cross frame portion 52, respectively. It protrudes in between and is fitted into the opening 58. Further, the protruding portion 130 </ b> A in the protruding direction of the protruding portion 130 is located on the lower side (downward) in the vehicle vertical direction of the center portion 76 </ b> A in the vehicle width direction of the bending portion 76. Thereby, when the curved portion 76 is crushed downward during a side collision, the center portion 76A of the curved portion 76 in the vehicle width direction is supported by the distal end portion 130A of the protruding portion 130. .

  The curved portion 76 is a portion from the boundary portion between the plane and the curved surface of the upper wall portion 52U of the cross frame portion 52 to the outer end portion of the upper wall portion 52U in the vehicle width direction. Further, the center portion 76A in the vehicle width direction of the curved portion 76 is an intermediate point between the boundary portion and the outer end portion of the upper wall portion 52U in the vehicle width direction. It is a concept that includes a shifted part.

  Next, the operation of the vehicle battery mounting structure according to the first embodiment will be described.

  As shown in FIG. 3, an upper engaged portion 102 is formed on the upper wall surface 100 </ b> U of the inner end portion 100 of the impact absorbing member 80, and the lower engaged portion is formed on the lower wall surface 100 </ b> L of the inner end portion 100. A joint portion 112 is formed.

  On the other hand, an opening 58 is formed at an end 52 </ b> T in the vehicle width direction of the cross frame portion 52, and abuts against a lower portion of the inner end 100 of the shock absorbing member 80. An upper engagement portion 122 is formed at the upper edge portion 58U of the opening portion 58. The upper engaging portion 122 is inserted into the insertion port 108 of the upper engaged portion 102 formed on the upper wall surface 100U of the inner end portion 100 of the shock absorbing member 80, and is opposed to the upper engaged portion 102. The portion 106 is engaged with the vehicle in the vertical direction. A lower engagement portion 124 is formed on the lower edge portion 58L of the opening 58. The lower engagement portion 124 is inserted into the insertion port 118 of the lower engaged portion 112 formed on the lower wall surface 100L of the inner end portion 100 of the shock absorbing member 80, and the lower engaged portion 112 is engaged with the facing portion 116 in the vehicle vertical direction.

  As a result, the connection strength between the impact absorbing member 80 and the cross frame portion 52 against bending in the vehicle vertical direction is increased. As a result, when a side impact load F (see FIG. 1) is input to the shock absorbing member 80 toward the cross frame portion 52, the shock absorbing member 80 in the vehicle vertical direction of the end portion 52 </ b> T of the cross frame portion 52. The shift is suppressed, and the side collision load F is easily transmitted from the inner end portion 100 of the shock absorbing member 80 to the end portion 52T of the cross frame portion 52. As a result, the impact absorbing member 80 takes a reaction force on the end portion 52T of the cross frame portion 52 and is easily crushed to the cross frame portion 52 side, so that the amount of absorption of the side impact energy of the impact absorbing member 80 at the time of a side impact is reduced. Is suppressed. Therefore, the damage etc. of the battery unit 14 at the time of a side collision are suppressed.

  In the present embodiment, the upper engagement portion 122 is formed at the upper edge portion 58U of the opening 58 of the cross frame portion 52, and the lower engagement portion 124 is formed at the lower edge portion 58L of the opening 58. ing. By disposing the upper engagement portion 122 and the lower engagement portion 124 on the inner end portions 100 of the shock absorbing member 80 on both sides in the vehicle vertical direction, the shock absorbing member 80 and the cross frame portion against bending in the vehicle vertical direction are arranged. The connection strength with 52 is further increased.

  Further, a projecting portion 130 is formed at the lower portion of the inner end portion 100 of the shock absorbing member 80. By fitting the protruding portion 130 into the opening 58 of the cross frame portion 52, the connection strength between the shock absorbing member 80 and the end portion 52T of the cross frame portion 52 in the vehicle vertical direction and the vehicle front-rear direction can be increased, and the cross The collapse of the end portion 52T of the frame portion 52 is suppressed. Further, the integrity between the end 52T of the cross frame portion 52 and the shock absorbing member 80 is improved.

  On the other hand, the shock absorbing member 80 is formed with a plurality of absorbing portions 86A to 86D. The proof stress of these absorption parts 86A-86D is set so that it may become large in order of absorption part 86D, absorption part 86C, absorption part 86A, and absorption part 86B. Thereby, when the side impact load F is input to the battery unit 14 side with respect to the impact absorbing member 80, the impact absorbing member 80 is crushed in the order of the absorbing portion 86D, the absorbing portion 86C, the absorbing portion 86A, and the absorbing portion 86B. Therefore, the absorption efficiency of side collision energy (collision energy) is improved.

  In the present embodiment, the shock absorbing member 80 is provided across the floor side member lower 34 and the rocker 20. That is, the absorbing portion 86 </ b> D (outer portion) located outside the shock absorbing member 80 in the vehicle width direction is disposed below the rocker 20. Thereby, compared with the structure which has arrange | positioned the impact-absorbing member 80 only inside the vehicle width direction rather than the rocker 20, the absorption capacity | capacitance of collision energy increases.

  Further, the upper portion of the inner end portion 100 (absorbing portion 86A) of the shock absorbing member 80 is disposed inside the floor side member lower 34 in the vehicle width direction and is adjacent to the floor side member lower 34 in the vehicle width direction. ing. Therefore, at the time of a side collision, the upper part of the inner end portion 100 of the shock absorbing member 80 is pressed toward the battery unit 14 by the floor side member lower 34. At this time, when the upper portion of the inner end portion 100 of the impact absorbing member 80 is crushed, the side collision energy is absorbed.

  Here, the upper wall surface 100U of the inner end portion 100 is an inclined surface that is inclined so as to face upward as it goes outward in the vehicle width direction. On the other hand, the curved portion 76 formed on the upper wall portion 52U of the cross frame portion 52 is curved so as to face upward as it goes outward in the vehicle width direction, and its end side is the upper edge portion 58U of the opening portion 58. Is extended to the outside in the vehicle width direction and coupled to the upper wall surface 100U of the inner end portion 100. Thus, when the upper portion of the inner end portion 100 of the shock absorbing member 80 is pressed toward the battery unit 14 by the floor side member lower 34, the upper wall surface 100U and the curve of the inner end portion 100 are curved from the upper portion of the inner end portion 100. The side impact load F is transmitted to the end portion 52T of the cross frame portion 52 through the portion 76. As a result, the upper part of the inner end portion 100 of the shock absorbing member 80 is easily crushed. Therefore, side impact energy can be efficiently absorbed in the upper part of the inner end portion 100 of the impact absorbing member 80.

  In particular, in the present embodiment, the distal end portion 130A of the protruding portion 130 is positioned below the vehicle vertical direction center portion 76A of the bending portion 76 in the vehicle width direction. Thus, when the bending portion 76 is crushed downward, the center portion 76A in the vehicle width direction of the bending portion 76 is supported by the tip portion 130A of the protruding portion 130. As a result, the downward crushing of the bending portion 76 is suppressed. Therefore, at the time of a side collision, the side collision load F is more easily transmitted from the upper part of the inner end portion 100 of the shock absorbing member 80 to the end portion 52T of the cross frame portion 52.

  In the present embodiment, the battery frame 50 is attached to the floor side member lower 34 and the rocker 20 constituting the vehicle body via the impact absorbing member 80. Thereby, compared with the case where the impact absorbing member 80 and the battery frame 50 are separately attached to the vehicle body, the labor of attaching the impact absorbing member 80 and the battery frame 50 to the vehicle body is reduced.

  Further, when the shock absorbing member 80 and the battery frame 50 are separately attached to the vehicle body, a gap for absorbing an attachment error or the like is required between the shock absorbing member 80 and the cross frame portion 52. Therefore, there is a possibility that the impact absorbing member 80 is displaced in the vehicle vertical direction with respect to the end portion 52T of the cross frame portion 52 at the time of a side collision, and the side impact load F from the impact absorbing member 80 to the end portion 52T of the cross frame portion 52 is. Is difficult to communicate.

  On the other hand, in the present embodiment, the cross frame portion 52 is attached to the floor side member lower 34 and the rocker 20 via a pair of impact absorbing members 80. That is, the cross frame portion 52 is attached to the floor side member lower 34 and the rocker 20 while being connected to the pair of impact absorbing members 80. Therefore, a gap between the shock absorbing member 80 and the end portion 52T of the cross frame portion 52 becomes unnecessary. Therefore, the side impact load F is more easily transmitted from the impact absorbing member 80 to the end portion 52T of the cross frame portion 52 at the time of a side impact.

  Further, the upper engaging portion 122 formed on the upper edge portion 58U of the opening 58 of the cross frame portion 52 is inserted into the upper engaged portion 102 formed on the upper wall surface 100U of the inner end portion 100 of the shock absorbing member 80. By being inserted into the slot 108, the upper engaging portion 122 is engaged with the upper engaged portion 102 in the vehicle vertical direction. Similarly, the lower engagement portion 124 formed on the lower edge portion 58L of the opening 58 of the cross frame portion 52 is connected to the lower engagement portion formed on the lower wall surface 100L of the inner end portion 100 of the shock absorbing member 80. The lower engagement portion 124 is engaged with the lower engaged portion 112 in the vehicle vertical direction by being inserted into the insertion port 118 of the joint portion 112. Therefore, the upper engaging portion 122 and the upper engaged portion 102 can be easily engaged, and the lower engaging portion 124 and the lower engaged portion 112 can be easily engaged. . Therefore, the workability of the connecting operation between the end portion 52T of the cross frame portion 52 and the shock absorbing member 80 is improved.

  In the present embodiment, the lattice-like body 60 of the battery frame 50 is formed of CFRP, and the impact absorbing member 80 is formed of aluminum, so that the impact energy of the impact absorbing member 80 is reduced while reducing the weight of the battery frame 50. Absorption performance can be improved. In this case, the cross frame main body 62 and the shock absorbing member 80 are formed of different materials, but the upper engagement portion 122 and the lower engagement formed at the end 52T of the cross frame portion 52 are also used. The portion 124 is engaged with the upper engaged portion 102 and the lower engaged portion 112 formed at the inner end portion 100 of the shock absorbing member 80, thereby connecting the shock absorbing member 80 and the cross frame portion 52. Strength can be secured. That is, in the present embodiment, it is possible to reduce the weight of the cross frame portion 52 and the like while ensuring the connection strength between the shock absorbing member 80 and the end portion 52T of the cross frame portion 52 against bending in the vehicle vertical direction.

  In the present embodiment, the inner end portion 100 of the shock absorbing member 80 is located on the lower side in the vehicle vertical direction of the center portion 76A in the vehicle width direction of the curved portion 76 formed on the upper wall portion 52U of the cross frame portion 52. Although the example which has arrange | positioned 130 A of front-end | tip parts of the formed protrusion part 130 was shown, it does not restrict to this. The distal end portion 130 </ b> A of the protruding portion 130 may be displaced from the central portion 76 </ b> A of the bending portion 76 in the vehicle width direction.

  Next, the vehicle battery mounting structure according to the second embodiment will be described. In addition, the thing of the structure similar to 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits suitably and demonstrates.

  As shown in FIG. 5, in the vehicle battery mounting structure 140 according to the second embodiment, the shock absorbing member 150 is disposed across the floor side member lower 34 and the rocker 20. The impact absorbing member 150 is disposed below the floor side member lower 34 in the vehicle vertical direction.

  Further, the shock absorbing member 150 has a closed cross-sectional shape as viewed from the vehicle front-rear direction, and the inside thereof is partitioned by a plurality of vertical partition walls 152 extending in the vehicle vertical direction. Thereby, a plurality of absorbing portions 154 arranged in the vehicle width direction are formed in the impact absorbing member 150. Each absorber 154 has a closed cross-section as viewed from the vehicle front-rear direction. Hereinafter, for convenience of explanation, the plurality of absorbing portions 154 will be described as an absorbing portion 154A, an absorbing portion 154B, and an absorbing portion 154C in order from the inside in the vehicle width direction.

  The upper wall portion of the absorbing portion 154A located on the inner side in the vehicle width direction is coupled to the lower wall portion 34B of the floor side member lower 34 by a bolt 42 and a weld nut 44. A working hole 90 into which the bolt 42 is inserted is formed in the lower wall portion of the absorbing portion 154A. On the other hand, a bracket 156 extending upward is formed on the upper wall portion of the absorbing portion 154C located outside the vehicle width direction. The front end side of the bracket 156 is bent along the lower wall portion 22B of the rocker outer panel 22, and is coupled to the lower wall portion 22B by a bolt 46 and a weld nut 48. A work hole 92 into which the bolt 46 is inserted is formed in the upper wall portion and the lower wall portion of the absorbing portion 154C.

  A projecting portion 162 that projects inward in the vehicle width direction is formed on the inner end portion (absorbing portion 154A) 160 of the shock absorbing member 150 in the vehicle width direction. The protruding portion 162 protrudes between the upper engaging portion 122 and the lower engaging portion 124 formed on the upper edge portion and the lower edge portion of the opening portion 58 of the cross frame portion 52, respectively. It is inserted in.

  Moreover, the upper wall surface 162U of the protrusion 162 is an inclined surface that is inclined so as to be directed upward as it goes outward in the vehicle width direction. An upper engaged portion 102 is formed on the upper wall surface 162U of the protruding portion 162. A lower engaged portion 112 is formed on the lower wall surface 162L of the protruding portion 162.

  On the other hand, a curved portion 78 is formed on the upper wall portion 52U of the cross frame portion 52 so as to curve upward as it goes outward in the vehicle width direction. The curved portion 78 is joined by adhesion or welding in a state of being superimposed on the upper wall surface 162U of the projecting portion 162. Further, the outer end of the curved portion 78 in the vehicle width direction, that is, the upper edge portion of the opening 58 is the upper engaging portion 126, and the upper engaged portion formed on the upper wall surface 162 U of the protruding portion 162. 102 is inserted into the upper engaged portion 102 from the insertion port 108 and is engaged with the facing portion 106 of the upper engaged portion 102 in the vehicle vertical direction.

  The outer end portion of the under cover 70 constituting the lower wall portion 52L of the cross frame portion 52 in the vehicle width direction, that is, the lower edge portion of the opening 58 is a lower engaging portion 128, and is below the protruding portion 162. It is inserted into the lower engaged portion 112 from the insertion port 118 of the lower engaged portion 112 formed on the wall surface 162L, and is engaged with the opposing portion 116 of the lower engaged portion 112 in the vehicle vertical direction. Are combined.

  Next, the operation of the vehicle battery mounting structure according to the second embodiment will be described.

  A projecting portion 162 that projects inward in the vehicle width direction is formed at the inner end 160 of the impact absorbing member 150 in the vehicle width direction. The protrusion 162 is fitted into an opening 58 formed at the end 52T of the cross frame portion 52. Thereby, the connection strength between the end portion 52T of the cross frame portion 52 and the shock absorbing member 150 with respect to the bending in the vehicle width direction and the vehicle front-rear direction is enhanced, and the end portion 52T of the cross frame portion 52 is prevented from being crushed. .

  An upper engaged portion 102 is formed on the upper wall surface 162U of the protruding portion 162, and a lower engaged portion 112 is formed on the lower wall surface 162L of the protruding portion 162. On the other hand, the upper edge portion of the opening 58 formed at the end 52T of the cross frame portion 52 is an upper engaging portion 126. The upper engaging portion 126 is inserted into the upper engaged portion 102 from the insertion port 108 of the upper engaged portion 102 formed on the upper wall surface 162U of the protruding portion 162, and the upper engaged portion 102 is inserted. Is engaged with the opposite portion 106 in the vehicle vertical direction. Further, the lower edge portion of the opening 58 is a lower engagement portion 128. The lower engaging portion 128 is inserted into the lower engaged portion 112 from the insertion port 118 of the lower engaged portion 112 formed on the lower wall surface 162L of the projecting portion 162, and the lower engaged portion 128 is inserted. The opposing portion 116 of the engaging portion 112 is engaged in the vehicle vertical direction.

  Thereby, the connection strength between the end portion 52T of the cross frame portion 52 and the shock absorbing member 150 with respect to bending in the vehicle vertical direction is enhanced. As a result, when a side impact load F (see FIG. 1) is input to the shock absorbing member 150 toward the cross frame portion 52, the inner end portion 160 of the shock absorbing member 150 to the end portion 52T of the cross frame portion 52. The side impact load F is easily transmitted. That is, the shock absorbing member 150 takes a reaction force on the end portion 52T of the cross frame portion 52 and is easily crushed to the cross frame portion 52 side. Therefore, similarly to the first embodiment, a decrease in the amount of side impact energy absorbed by the shock absorbing member 150 is suppressed.

  Further, the upper wall surface 162U of the projecting portion 162 is inclined so as to face upward as it goes outward in the vehicle width direction. On the other hand, the curved portion 78 formed on the upper wall portion 52U of the cross frame portion 52 is curved upward as it goes outward in the vehicle width direction, and is joined in a state of being superimposed on the upper wall surface 162U of the protruding portion 162. ing. As a result, the side collision load F is more easily transmitted from the inner end 160 of the shock absorbing member 150 to the end 52T of the cross frame 52 during a side collision.

  Next, a modified example of the vehicle battery mounting structure according to the first embodiment will be described. In the following, various modified examples will be described using the first embodiment as an example, but these modified examples are also applicable to the second embodiment.

  Although the example which formed the protrusion part 130 in the inner side edge part 100 of the impact-absorbing member 80 was shown in the said 1st Embodiment, these protrusion parts 130 can be abbreviate | omitted suitably.

  Moreover, although the example which formed the curved part 76 in the upper wall part 52U of the cross frame part 52 was shown in the said 1st Embodiment, it is not restricted to this. The upper wall portion 52U of the cross frame portion 52 can be appropriately changed according to the shape of the inner end portion 100 of the shock absorbing member 80. For example, instead of the curved portion 76, the upper wall portion 52U of the cross frame portion 52 is connected to the vehicle. You may form the inclination part which inclines upwards as it goes to the outer side of the width direction. Further, the bending portion 76 can be omitted.

  Further, in the first embodiment, the upper engagement portion 122 and the lower engagement as the engagement portions at the upper edge portion 58U and the lower edge portion 58L of the opening 58 formed in the end portion 52T of the cross frame portion 52. Although the example which formed the part 124 was shown, it is not restricted to this. The number and arrangement of the engaging portions can be appropriately changed according to the shape of the inner end portion 100 of the shock absorbing member 80. Similarly, in the first embodiment, the upper engaged portion 102 and the lower engaged portion 112 as the engaged portions are formed on the inner end portion 100 of the shock absorbing member 80. The number and arrangement of the parts can be changed as appropriate. Moreover, it is also possible to interchange the structure of the engaging part and to-be-engaged part in the said 1st Embodiment. That is, the upper engaged portion 102 or the like as an engaging portion may be formed on the cross frame portion 52 side, and the upper engaging portion 122 or the like as an engaged portion may be formed on the shock absorbing member 80 side.

  In the first embodiment, the shock absorbing member 80 is formed of a metal such as aluminum. However, the shock absorbing member 80 is formed of a resin such as CFRP or FRP like the lattice-like body 60 of the battery frame 50. It is also possible. In this case, the weight of the impact absorbing member 80 and the battery frame 50 can be reduced.

  Further, in the first embodiment, an example in which the shock absorbing member 80 is attached to the rocker 20 and the floor side member lower 34 has been described. However, the shock absorbing member 80 is attached to at least one of the rocker 20 and the floor side member lower 34. Also good.

  Furthermore, in the first embodiment, the example in which the single under cover 70 as the cover portion is joined to the lower surface of the grid-like body 60 of the battery frame 50 is shown, but the present invention is not limited to this. For example, a plurality of cross frame portions 52 can be formed by separately joining plate members as cover portions to the lower surfaces of the plurality of cross frame main body portions 62 in the lattice-like body 60.

  The first embodiment of the present invention has been described above. However, the present invention is not limited to such an embodiment, and the first embodiment and various modifications may be used in combination as appropriate. Needless to say, the present invention can be implemented in various forms without departing from the scope of the invention.

10. Vehicle battery mounting structure 14 Battery unit (battery)
16 Floor panel (vehicle floor)
34 Floor side member lower 52 Cross frame part (battery cross frame part)
52T end (end of the battery cross frame in the vehicle width direction)
58 Opening 58U Upper edge 58L Lower edge 62 Cross frame main body 70 Under cover (cover)
76 bending portion 76A center portion (center portion of bending portion in vehicle width direction)
78 Curved portion 80 Shock absorbing member 100 Inner end (connecting portion, inner end of shock absorbing member)
102 Upper engaged portion (engaged portion)
108 Insertion port 112 Lower engaged portion (engaged portion)
118 Insertion port 122 Upper engagement part (engagement part)
124 Lower engagement part (engagement part)
126 Upper engagement part (engagement part)
128 Lower engagement part (engagement part)
130 projecting portion 130A tip portion 140 battery mounting structure for vehicle 150 shock absorbing member 160 inner end (connecting portion, inner end of shock absorbing member)
162 Protrusion

Claims (8)

A pair of impact absorbing members disposed below the vehicle floor on both sides of the vehicle and extending in the vehicle longitudinal direction;
A battery cross frame portion disposed between the pair of shock absorbing members, connecting the pair of shock absorbing members and supporting the battery;
Engaged portions respectively formed at connecting portions of the pair of shock absorbing members with the end portions in the vehicle width direction of the battery cross frame portions;
An engagement portion formed at the end of the battery cross frame portion and engaged with the engaged portion in the vehicle vertical direction;
A vehicle battery mounting structure comprising: The engaged portion has an insertion port opened toward the inside in the vehicle width direction,
The engaging portion is inserted into the engaged portion from the insertion port and engaged with the engaged portion.
The vehicle battery mounting structure according to claim 1. An inner end of the battery cross frame portion as viewed from the vehicle width direction has a closed cross-sectional shape, and the end portion is located on the inner side of the shock absorbing member in the vehicle width direction of the connecting portion. Connected to the
The engaged portions are respectively formed on the upper wall surface and the lower wall surface of the inner end portion,
The engaging portions are respectively formed on an upper edge portion and a lower edge portion of an opening formed in the end portion of the battery cross frame portion.
The vehicle battery mounting structure according to claim 1 or 2. The inner end portion of the shock absorbing member is formed with a protruding portion that protrudes between the engaging portions formed on the upper edge portion and the lower edge portion.
The vehicle battery mounting structure according to claim 3. A floor side member lower disposed on the lower wall surface of the vehicle floor in the vehicle width direction of the battery, extending in the vehicle front-rear direction and disposed above the shock absorbing member;
The inner end portion of the shock absorbing member is disposed on the inner side in the vehicle width direction than the floor side member lower, the upper portion is adjacent to the floor side member lower in the vehicle width direction, and the battery cross frame is disposed at the lower portion. The ends are connected,
The upper wall surface of the inner end portion is an inclined surface that is inclined so as to be inclined upward as it goes outward in the vehicle width direction,
The upper wall portion of the battery cross frame portion is curved so as to face upward as it goes outward in the vehicle width direction, and an end portion extends outward from the upper edge portion in the vehicle width direction to the inclined surface. A joined bend is formed,
The vehicle battery mounting structure according to claim 4. The front end portion of the projecting portion in the projecting direction is located on the lower side in the vehicle vertical direction of the center portion in the vehicle width direction of the curved portion,
The vehicle battery mounting structure according to claim 5. The battery cross frame portion is attached to the vehicle body via the pair of shock absorbing members.
The vehicle battery mounting structure according to any one of claims 1 to 6. The battery cross frame part is
A cross frame main body having an open cross-sectional shape with an open bottom;
A cover part which is disposed below the cross frame main body part and forms a closed cross section together with the cross frame main body part;
Have
The cross frame main body is formed of resin,
The shock absorbing member is formed of resin or metal;
The vehicle battery mounting structure according to any one of claims 1 to 7.

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