JP6070046B2 - Battery mounting structure for vehicles - Google Patents

Description

  The present invention relates to a vehicle battery mounting structure.

  2. Description of the Related Art A structure in which a battery frame that accommodates a driving battery disposed under a floor portion of an electric vehicle is formed of a fiber reinforced resin material has been conventionally known (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 7-117490

  However, since the fiber reinforced resin material has a low strain limit, when a local collision load is input from the outside in the vehicle width direction due to a side collision of the vehicle, the battery frame formed of the fiber reinforced resin material does not collide. It is possible to exceed the strain limit before transmitting the load.

  Accordingly, an object of the present invention is to provide a vehicle battery mounting structure in which a battery frame formed of a fiber reinforced resin material can efficiently distribute a load even when a local collision load is input at the time of a side collision of the vehicle. .

In order to achieve the above object, a vehicle battery mounting structure according to claim 1 according to the present invention includes a battery frame upper made of a fiber reinforced resin to which a battery disposed on a vehicle body lower side of a floor panel is attached, A bottom portion, a side wall portion standing on at least both ends of the bottom portion in the vehicle width direction, and a projecting portion projecting outward from the upper end portion of the side wall portion in the vehicle width direction, the projecting portion being the battery frame A battery frame lower made of a fiber reinforced resin which forms a battery frame having a closed cross-section structure by being joined to the outer periphery of the upper, an intermediate member provided between the battery frame upper and the battery frame lower, so as to cover the projecting portion and the side wall portion, and a metal protective member provided with contact or proximity to the overhung portion and a side wall portion, in the vehicle width direction outer side of the floor panel Has a rocker which is location, in the vehicle width direction outer side of the protective member, and an energy absorbing member disposed on the vehicle body lower side of the rocker, wherein the intermediate member includes groove portion extending in the vehicle width direction And side walls closing both ends of the concave groove in the vehicle width direction, wherein the side walls are in contact with or close to the side walls.

According to the first aspect of the present invention, the metal protective member includes a side wall portion standing on at least both ends in the vehicle width direction of the battery frame lower made of fiber reinforced resin, and a vehicle from the upper end portion of the side wall portion. It is provided in contact with or close to the side wall portion and the overhanging portion so as to cover the overhanging portion overhanging outward in the width direction .

And between the battery frame upper and the battery frame lower is provided an intermediate member having a concave groove portion extending in the vehicle width direction and side walls closing the both ends of the concave groove portion in the vehicle width direction. It is in contact with or close to the side wall. Further, an energy absorbing member is disposed on the outer side in the vehicle width direction of the protective member and on the vehicle body lower side of the rocker .

Accordingly, the local collision load input at the time of the side collision of the vehicle is efficiently dispersed by the protective member while being absorbed by the rocker and the energy absorbing member, and transmitted to the side wall portion of the battery frame lower, and from the side wall portion. It is efficiently transmitted to the intermediate member. That is, the local collision load is efficiently distributed by the battery frame provided with the protection member .

A vehicle battery mounting structure according to a second aspect is the vehicle battery mounting structure according to the first aspect , wherein the protection member is formed in a closed cross-sectional shape .

According to invention of Claim 2 , the protection member is formed in the closed cross-sectional shape . Therefore, the local collision load input at the time of the side collision of the vehicle is efficiently distributed by the protective member and transmitted to the side wall portion of the battery frame lower .

The vehicle battery mounting structure according to claim 3 is the vehicle battery mounting structure according to claim 1 or 2 , wherein the energy absorbing member is integrally formed on the outer side in the vehicle width direction of the protection member. It is characterized by being provided et al.

According to the invention described in claim 3, the vehicle width direction outer side of the protective member, the energy absorbing member is found integrally formed. Therefore, local collision load inputted during a side collision of the vehicle, by the protective member while being absorbed by the energy absorbing member is efficiently dispersed is transmitted to the side wall portion of the battery frame lower. Further, according to the present invention, the number of parts and the manufacturing cost can be reduced.

Further, the vehicle battery mounting structure according to claim 4 is the vehicle battery mounting structure according to any one of claims 1 to 3 , wherein the vehicle battery mounting structure is along the vehicle body longitudinal direction on the lower surface of the floor panel. An under member is joined, and the flange portion of the battery frame is constituted by the overhang portion and the outer peripheral portion, and the protection member is fixed to the under member together with the flange portion. It is a feature.

According to the fourth aspect of the invention, the protective member is fixed together with the flange portion to the under member joined to the lower surface of the floor panel along the longitudinal direction of the vehicle body. Therefore, even when a part of the collision load is input from the under member to the flange portion at the time of a side collision of the vehicle, the part of the collision load is efficiently dispersed by the protective member.

As described above, according to the first aspect of the present invention, even if a local collision load is input at the time of a side collision of the vehicle, the protective member is absorbed by the rocker and the energy absorbing member while absorbing the collision load. it is possible to efficiently I by the provided battery frame well dispersed, can be efficiently transmitted to the intermediate member in the battery frame.

  According to the second aspect of the present invention, the local collision load input at the time of a side collision of the vehicle can be efficiently dispersed by the battery frame provided with the protection member.

According to the third aspect of the present invention, the local collision load input at the time of a side collision of the vehicle can be efficiently dispersed while being absorbed by the battery frame provided with the protection member .

Moreover, according to the invention which concerns on Claim 3 , a number of parts and manufacturing cost can be reduced.

According to the invention which concerns on Claim 4 , even if a part of collision load is input into the flange part from the under member at the time of the side collision of a vehicle, a part of the collision load can be disperse | distributed efficiently.

It is a perspective view which shows the battery frame and protective member which comprise the vehicle battery mounting structure which concerns on 1st Embodiment. It is a front sectional view showing a vehicle battery mounting structure according to the first embodiment. It is a front sectional view showing a state when a pole collides with a side surface of a vehicle provided with a vehicle battery mounting structure according to the first embodiment. It is a front sectional view showing a vehicle battery mounting structure according to a second embodiment. It is a front sectional view showing a vehicle battery mounting structure according to a third embodiment. (A) It is a disassembled perspective view which shows the battery frame and protective member which comprise the vehicle battery mounting structure which concerns on 4th Embodiment. (B) It is a sectional side view of a partition member. It is a front sectional view showing a vehicle battery mounting structure according to a fourth embodiment.

  Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. For convenience of explanation, an arrow UP appropriately shown in each drawing is an upward direction of the vehicle body, an arrow FR is a forward direction of the vehicle body, and an arrow OUT is an outer side of the vehicle width direction. Further, in the following description, when using the up / down, front / rear, and left / right directions, the vertical direction of the vehicle body, the front / rear direction of the vehicle body direction, and the left / right direction of the vehicle body (vehicle width direction) are indicated. 1 and 6 show the left side of the vehicle body, but the right side of the vehicle body is also symmetrical and identical, and therefore the description of the right side of the vehicle body will be omitted as appropriate.

<First Embodiment>
First, the first embodiment will be described. As shown in FIGS. 1 and 2, a vehicle battery mounting structure 10 according to this embodiment applied to a vehicle such as an electric vehicle is disposed on a lower side of a vehicle body of a metal floor panel 12 constituting a vehicle body floor. The battery has a battery frame (stack frame) 20 made of fiber reinforced resin that supports the fuel cell stack 16 as a battery from the lower side of the vehicle body.

  On the lower surface of the floor panel 12, a pair of left and right under members (side frames) 14 constituting the vehicle body skeleton structure are provided along the vehicle longitudinal direction. Each under member 14 is formed of a metal having a substantially hat-shaped cross section, and flange portions 15 projecting in the vehicle width direction are joined to the lower surfaces of both ends of the floor panel 12 in the vehicle width direction by welding or the like.

  The under member 14 extending in the longitudinal direction of the vehicle body is formed with a plurality of through-holes 14A through which a flange bolt 50 described later is inserted along the longitudinal direction (longitudinal direction) of the vehicle body. A weld nut 52 is provided on the upper surface of the under member 14 coaxially with each mounting hole 14A.

  The fuel cell stack 16 has an exterior portion 17 formed of a metal (or resin) in a rectangular box shape, and projects outward at a plurality of predetermined positions in the lower peripheral edge of the exterior portion 17. The overhang portion 18 is integrally formed. Each overhanging portion 18 is formed with a through hole 18A through which the flange bolt 50 is inserted.

  The battery frame 20 includes a flat upper frame 22 as a battery frame upper and a tray-like lower frame 24 as a battery frame lower. That is, the lower frame 24 includes a flat bottom portion 25, a flat side wall portion 26 erected integrally with a peripheral portion (at least both ends in the vehicle width direction) of the bottom portion 25, and an outer side from the upper end portion of the side wall portion 26. And a flat plate-like protruding portion 27 that is integrally extended toward (at least in the vehicle width direction outside).

  And the battery frame 20 of a rectangular closed cross-section structure is comprised by joining the overhang | projection part 27 of the lower frame 24, and the outer peripheral part 23 of the upper frame 22 with an adhesive agent. In the following, the projecting portion 27 and the outer peripheral portion 23 on the outer side in the vehicle width direction joined to each other are referred to as a flange portion 28 of the battery frame 20. The flange portion 28 is a fixed portion of the battery frame 20 with the under member 14.

  At a plurality of predetermined positions excluding the outer peripheral portion 23 of the upper frame 22, penetrating mounting holes 22 </ b> A are formed. A metal cylindrical cylindrical member 36 is coaxially inserted into each mounting hole 22A. That is, a flange nut 48 is joined to the lower surface of the upper frame 22 by an adhesive coaxially with each mounting hole 22A, and the collar member 36 is integrally formed on the upper surface of each flange nut 48. It is provided coaxially.

  Accordingly, the fuel cell stack 16 is placed on the upper surface of the upper frame 22 so that the through hole 18A of the overhanging portion 18 and the through hole 36A of the collar member 36 communicate with each other. The fuel cell stack 16 is fastened and fixed to the battery frame 20 (upper frame 22) by inserting the flange bolt 50 into the hole 36A and screwing it into the flange nut 48.

  In addition, at both ends of the lower frame 24 in the vehicle width direction, metal protective members 30 extending in the longitudinal direction of the vehicle body (having ductility) are provided. The protective member 30 is formed of, for example, a high-tensile steel plate or an ultra-high-strength steel plate, and is formed on the lower surface of the overhang portion 27, the outer surface of the side wall portion 26, and a part of the lower surface of the bottom portion 25 ( They are in contact with or close to at least the lower surface of the overhanging portion 27 and the outer surface of the side wall portion 26 so as to cover them.

  That is, the protection member 30 is overlapped with a part of the bottom portion 25 that is convex toward the vehicle width direction inner lower portion through the side wall portion 26 from the overhang portion 27 (flange portion 28). Along the shape, it is bent into a substantially “S” shape in a front sectional view (viewed from the front-rear direction of the vehicle body), and is joined to each surface by an adhesive.

  Further, a metal energy absorbing member 32 extending in the longitudinal direction of the vehicle body is provided on the outer side in the vehicle width direction of the portion covering the side wall portion 26 of the protection member 30. The energy absorbing member 32 is configured in such a shape that a plurality of (for example, five) block portions having a rectangular closed cross-section shape are integrally combined, and an inner end in the vehicle width direction of the innermost block portion 34 in the vehicle width direction. The inner wall 34 </ b> A which is a portion is opposed to the portion covering the side wall portion 26 of the protection member 30 with a gap L (or without a gap).

  Then, the upper wall 34B of the innermost block portion 34 in the vehicle width direction is brought into contact with a portion covering the protruding portion 27 of the protection member 30, and the under member together with the protection member 30 and the flange portion 28 by a flange bolt 50 described later. 14 is fastened and fixed. The energy absorbing member 32 is configured to absorb a part of the collision load F (see FIG. 3) by plastic deformation (crushed) toward the inner side in the vehicle width direction at the time of a side collision of the vehicle.

  Further, the energy absorbing member 32 (block part 34), the protective member 30, the outer peripheral part 23, and the overhang part 27 (flange part 28) communicate with each other through a plurality of through holes 32A for inserting the flange bolts 50, A through hole 30A and through holes 23A and 27A (through hole 28A) are formed along the vehicle body front-rear direction. A cylindrical collar member 38 made of metal is coaxially inserted into the through holes 23A and 27A (through holes 28A).

  That is, the collar member 38 is provided integrally with the protection member 30 (coaxially with the through hole 30A). Therefore, the flange bolt 28 is inserted into the through hole 32A, the through hole 30A, the through hole 38A of the collar member 38, and the mounting hole 14A from the lower side of the vehicle body, and screwed into the weld nut 52, whereby the flange portion 28 of the battery frame 20 is engaged. Are fastened and fixed to the under member 14 together with the energy absorbing member 32 and the protective member 30.

  Note that the outer end in the vehicle width direction of the illustrated protection member 30 is flush with the outer end in the vehicle width direction of the flange portion 28 (the outer peripheral portion 23 and the overhang portion 27). The portion 23 and the overhanging portion 27) may be configured to protrude slightly outward in the vehicle width direction from the outer end portion in the vehicle width direction.

  Further, the outer end in the vehicle width direction of the floor panel 12 is a bent portion 12A bent upward, and the bent portion 12A is joined to the inner panel 42 of the metal rocker 40 by welding or the like. Yes. The rocker 40 includes an inner panel 42 having a substantially hat-shaped cross section, an outer panel 44 having a substantially hat-shaped cross section, and a reinforcement 46 having a substantially hat-shaped cross section provided between the inner panel 42 and the outer panel 44. And is composed of.

  That is, the upper flange portion 46A of the reinforcement 46 is joined to the upper flange portion 42A of the inner panel 42, and the upper flange portion 44A of the outer panel 44 is joined to the upper flange portion 46A. And the lower flange part 46B of the reinforcement 46 is joined to the lower flange part 42B of the inner panel 42, and the lower flange part 44B of the outer panel 44 is joined to the lower flange part 46B.

  As a result, the rocker 40 has a closed cross-sectional structure composed of the inner panel 42 and the reinforcement 46, and the reinforcement 46 and the outer panel 44.

  Next, the operation of the vehicle battery mounting structure 10 configured as described above will be described. That is, as shown in FIG. 3, the operation when the vehicle collides with the columnar pole P extending in the vertical direction will be described.

  As shown in FIG. 3, when the vehicle collides with the pole P on the side, an excessively large collision load F is input to the rocker 40 and the energy absorbing member 32. In this case, the rocker 40 and the energy absorbing member 32 move while being plastically deformed inward in the vehicle width direction, and transmit a part of the input collision load F to the floor panel 12 and the battery frame 20.

  Here, a high-strength protective member 30 is provided from the protruding portion 27 (flange portion 28) to the bottom portion 25 of the battery frame 20. Therefore, the energy absorbing member 32 (block portion 34) moved while being plastically deformed inward in the vehicle width direction by the collision load F hits a portion covering the side wall portion 26 of the protection member 30, and is one of the collision loads F that could not be absorbed. The part is transmitted to the protection member 30.

  Then, the protection member 30 extends a part of the transmitted collision load F in the longitudinal direction (vehicle longitudinal direction) while withstanding the bending moment about the axis whose axial direction is the vehicle vertical direction inputted thereby. To disperse (accept) efficiently. A part of the collision load F dispersed in the longitudinal direction (vehicle longitudinal direction) is transmitted to the side wall portion 26 of the lower frame 24.

  That is, a part of the local collision load F input by the side collision of the vehicle is efficiently dispersed in the longitudinal direction of the vehicle body by the protective member 30 (battery frame 20) and transmitted to the battery frame 20. . Therefore, it is possible to suppress the battery frame 20 formed of the fiber reinforced resin material from exceeding (damaging) the strain limit.

  In particular, the protective member 30 is bent so as to overlap in order from the protruding portion 27 of the lower frame 24 to the side wall portion 26 and the bottom portion 25 (in a substantially “S” shape in a front sectional view). It is possible to suppress or prevent damage to the bent portion from the portion 27 (flange portion 28) to the bottom portion 25, specifically, the boundary portion between the overhang portion 27 and the side wall portion 26 and the boundary portion between the side wall portion 26 and the bottom portion 25. it can.

  Although not shown in the drawings, the outer end portion in the vehicle width direction of the protection member 30 is bent upward, and at least a part of the outer end portion in the vehicle width direction of the flange portion 28 (the overhang portion 27 and the outer peripheral portion 23) is formed. You may comprise so that it may cover. According to this, the vehicle width direction outer side edge part of the flange part 28 (the outer peripheral part 23 and the overhang | projection part 27) can be protected.

  That is, according to this, since the inner panel 42 of the rocker 40 can be prevented from directly hitting the outer end portion in the vehicle width direction of the flange portion 28 (the outer peripheral portion 23 and the overhang portion 27), the flange portion 28 ( It is possible to suppress or prevent the outer end portion of the outer peripheral portion 23 and the overhang portion 27) from being damaged in the vehicle width direction.

Second Embodiment
Next, a second embodiment will be described. In addition, about the site | part equivalent to the said 1st Embodiment, the same code | symbol is attached | subjected and detailed description (an effect | action is also included) is abbreviate | omitted.

  As shown in FIG. 4, the protection member 30 according to the second embodiment is formed in a rectangular closed cross-sectional shape (square tube shape). That is, the protective member 30 includes an inner wall 30B that is in contact with or close to the side wall portion 26 so as to cover the side wall portion 26, and an upper wall 30C and a lower wall that have substantially the same width as the overhang portion 27. 30D and an outer wall 30E that is substantially flush with the vehicle width direction outer side end portion of the overhang portion 27 in a side sectional view.

  The inner wall 30B and the upper wall 30C of the protection member 30 are joined to the outer surface of the side wall portion 26 and the lower surface of the overhanging portion 27 by an adhesive, respectively, and flange bolts 50 are attached to the upper wall 30C. A through-hole 30A for insertion is formed. A through hole (not shown) for allowing the flange bolt 50 to enter from the lower side of the vehicle body is also formed in the lower wall 30D. An energy absorbing member (not shown) is provided outside the protective member 30 in the vehicle width direction.

  In the case of the protective member 30 having such a configuration, a bending moment about an axis with the vertical direction of the vehicle body as an axial direction due to a part of the transmitted (input) collision load F (without being absorbed by the energy absorbing member) is generated. Can withstand effectively. Therefore, in the case of this protective member 30, a part of the transmitted collision load F can be efficiently distributed in the longitudinal direction of the vehicle body, and it is more effective for the battery frame 20 to exceed the distortion limit (damage). Can be suppressed.

<Third Embodiment>
Next, a third embodiment will be described. In addition, about the site | part equivalent to the said 1st Embodiment and 2nd Embodiment, the same code | symbol is attached | subjected and detailed description (an effect | action is also included) is abbreviate | omitted.

  As shown in FIG. 5, the protective member 30 according to the third embodiment is configured by integrating an energy absorbing member 32. That is, the protective member 30 has an inner portion in the vehicle width direction formed in the same shape as that of the second embodiment, and a plurality of (for example, four) rectangular closed cross-section block portions are integrally formed on the outer side of the outer wall 30E in the vehicle width direction. The energy absorbing member 32 combined with each other is integrally connected.

  In the case of the protective member 30 configured as described above, the input collision load F is absorbed by the energy absorbing member 32 and a part thereof is transmitted to the inner portion of the protective member 30 in the vehicle width direction. It is possible to effectively withstand a bending moment about an axis whose vertical direction is the axial direction. Therefore, also in the case of this protective member 30, a part of the transmitted collision load F can be efficiently distributed over the longitudinal direction of the vehicle body, and it is more effective that the battery frame 20 exceeds (is damaged) the strain limit. Can be suppressed.

  Further, in the case of the protection member 30 according to the third embodiment, since the protection member 30 and the energy absorption member 32 are integrated, compared to a configuration in which the protection member 30 and the energy absorption member 32 are provided separately. There are advantages that the number of parts can be reduced and the manufacturing cost can be reduced.

<Fourth embodiment>
Finally, a fourth embodiment will be described. In addition, about the site | part equivalent to the said 1st Embodiment, the same code | symbol is attached | subjected and detailed description (an effect | action is also included) is abbreviate | omitted.

  As shown in FIGS. 6 and 7, in the fourth embodiment, a partition member 54 as an intermediate member is provided between the upper frame 22 and the lower frame 24. The partition member 54 is formed in the same size as the upper frame 22 and the lower frame 24 in plan view, and the outer peripheral portion 56 is formed between the projecting portion 27 of the lower frame 24 and the outer peripheral portion 23 of the upper frame 22. It is sandwiched between them and joined together.

  That is, in the fourth embodiment, the flange portion 28 is configured by the protruding portion 27 of the lower frame 24, the outer peripheral portion 56 of the partition member 54, and the outer peripheral portion 23 of the upper frame 22 on the outer side in the vehicle width direction. It is like that. Therefore, a plurality of through holes 56A for inserting the flange bolts 50 are formed in the outer peripheral portion 56 of the partition member 54 so as to communicate with the through holes 23A and 27A.

  Note that through holes 54 </ b> A communicating with the mounting holes 22 </ b> A are formed at a plurality of predetermined positions excluding the outer peripheral portion 56 of the partition member 54. Further, the partition member 54 has a concave groove portion 58 inserted into a space surrounded by the bottom portion 25 and the side wall portion 26 of the lower frame 24. The concave groove portion 58 is formed in an isosceles trapezoidal shape in a side sectional view shown in FIG. 6B, with the vehicle width direction being the longitudinal direction, and a plurality (for example, two) of the concave groove portions 58 are arranged in the longitudinal direction of the vehicle body. Is configured.

  Specifically, the groove 58 includes a pair of front and rear vertical walls 58A extending in the vehicle width direction and facing each other, a bottom wall 58B integrally connecting lower ends of the pair of front and rear vertical walls 58A, It is comprised by the side wall 58C which connects the right end parts and left end parts of a pair of vertical wall 58A integrally, respectively. That is, both end portions in the vehicle width direction of the recessed groove portion 58 are closed by the side walls 58C (both end portions in the vehicle width direction are the side walls 58C).

  Then, as shown in FIG. 7, the outer surface of each side wall 58C is disposed in contact with or close to the inner surface of the side wall portion 26 of the lower frame 24, joined by an adhesive, and the bottom surface of the bottom wall 58B. Are arranged in contact with or close to the upper surface of the bottom portion 25 and are joined by an adhesive.

  According to such a configuration, a part of the collision load F transmitted to the protection member 30 is efficiently dispersed by the protection member 30 over the entire longitudinal direction of the vehicle body and transmitted to the side wall portion 26 of the lower frame 24. And efficiently transmitted from the side wall portion 26 to the vertical wall 58A of the partition member 54. Therefore, it is possible to more effectively suppress the battery frame 20 from exceeding (damaging) the distortion limit.

  The outer surface of each side wall 58C may be configured not to be bonded to the inner surface of the side wall portion 26, and the lower surface of the bottom wall 58B may be configured not to be bonded to the upper surface of the bottom portion 25. Further, a relatively hard filler (not shown) of a low foam type may be filled between the upper frame 22 and the lower frame 24 instead of the partition member 54. Even if it is such a structure, the same effect is obtained.

  The vehicle battery mounting structure 10 according to the present embodiment has been described based on the drawings, but the vehicle battery mounting structure 10 according to the present embodiment is not limited to the illustrated one, and The design can be changed as appropriate without departing from the scope of the invention. For example, the protective member 30 is not limited to one formed from a high-strength steel plate or an ultra-high-strength steel plate, and may be formed from an aluminum alloy having a certain degree of hardness.

  Furthermore, the protection member 30 is not limited to the one that is bonded to the battery frame 20 by an adhesive, and may be configured to be bonded by a bonding means such as a rivet. The collar member 38 may be configured separately from the protection member 30, and the collar member 36 may also be configured separately from the flange nut 48. Further, the battery frame 20 in the present embodiment is not limited to the one that supports the fuel cell stack 16.

DESCRIPTION OF SYMBOLS 10 Battery mounting structure for vehicles 12 Floor panel 14 Under member 16 Fuel cell stack (battery)
20 battery frame 22 upper frame (battery frame upper)
24 Lower frame (Battery frame lower)
25 Bottom part 26 Side wall part 27 Overhang part 28 Flange part 30 Protection member 32 Energy absorption member 54 Partition member (intermediate member)

Claims (4)

A battery frame upper made of fiber reinforced resin to which a battery arranged on the lower side of the vehicle body of the floor panel is attached;
A bottom portion, a side wall portion standing on at least both ends of the bottom portion in the vehicle width direction, and a projecting portion projecting outward from the upper end portion of the side wall portion in the vehicle width direction, the projecting portion being the battery frame A battery frame lower made of fiber reinforced resin that constitutes a battery frame having a closed cross-sectional structure by being joined to the outer periphery of the upper;
An intermediate member provided between the battery frame upper and the battery frame lower;
A protective member made of metal provided in contact with or close to the overhanging part and the side wall part so as to cover at least the overhanging part and the side wall part;
A rocker disposed outside the floor panel in the vehicle width direction;
An energy absorbing member disposed on the vehicle width direction outside of the protective member and on the vehicle body lower side of the rocker;
Have
The intermediate member includes a recessed groove portion extending in the vehicle width direction and side walls that close both ends of the recessed groove portion in the vehicle width direction,
The battery mounting structure for a vehicle, wherein the side wall is in contact with or close to the side wall portion.   The vehicle battery mounting structure according to claim 1, wherein the protection member has a closed cross-sectional shape. 3. The vehicle battery mounting structure according to claim 1, wherein the energy absorbing member is integrally provided on the outer side in the vehicle width direction of the protective member. An under member is joined to the lower surface of the floor panel along the longitudinal direction of the vehicle body ,
The flange portion of the battery frame is constituted by the projecting portion and the outer peripheral portion, and the protection member is fixed to the under member together with the flange portion. 4. The vehicle battery mounting structure according to any one of 3 above.

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