Battery mounting structure

Abstract

The invention provides a battery mounting structure. In a vehicle, an elastic member is interposed between a first coupling member coupled to a vehicle body side and a second coupling member coupled to a battery case side at a coupling portion between the vehicle body constituting a frame of the vehicle and a battery case mounted below a floor panel of the vehicle. As a result, the battery case, which is a weight, functions as a dynamic damper, thereby suppressing vibration of the vehicle body. Further, in a first gap provided between the first coupling member and the second coupling member, a protrusion protruding from the second coupling member is provided. Therefore, the load input into the vehicle body can be quickly transmitted to the battery case side through the protruding part and can be dispersed. Therefore, the impact resistance during collision can be improved.

Description

Technical Field

[0001] The present invention relates to a battery mounting structure for a vehicle. Background Art

[0002] Japanese Patent Application Laid-Open No. 2019-014384 discloses that an elastic support member is provided between the battery device and the vehicle body, and the battery device is elastically supported relative to the vehicle body. It also discloses that the battery device functions as a dynamic damper to suppress the vibration of the vehicle body. Summary of the invention

[0003] However, in order to improve the impact resistance during a collision, it is expected that the load input into the vehicle body during a collision is quickly transferred to the battery housing side to disperse the load. However, in Japanese Patent Application Laid-Open No. 2019-014384, the battery device is elastically supported relative to the vehicle body. Therefore, there is room for improvement in ensuring a rapid load transfer path.

[0004] The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to obtain a battery mounting structure that can suppress the vibration of a vehicle body and improve the impact resistance performance during a collision.

[0005] A battery mounting structure according to a first aspect includes:

[0006] the body, which forms the frame of the vehicle;

[0007] A battery housing, which is combined with the vehicle body and mounted under the floor of the vehicle;

[0008] a first coupling member coupled to the vehicle body side at a coupling portion between the vehicle body and the battery housing;

[0009] a second coupling member coupled to the battery case side and mounted in a manner that a predetermined gap is provided with respect to the first coupling member;

[0010] an elastic member disposed in the gap and interposed between the first coupling member and the second coupling member;

[0011] A protrusion is provided to protrude from one of the first coupling member and the second coupling member into the gap.

[0012] In the battery mounting structure involved in the first embodiment, at the joint between the vehicle body constituting the frame of the vehicle and the battery case mounted under the floor of the vehicle, an elastic member is interposed between a first joint member joined to the vehicle body and a second joint member joined to the battery case. As a result, the battery case, which is a heavy object, functions as a dynamic damper, thereby suppressing the vibration of the vehicle body.

[0013] In addition, a protrusion protruding from one of the first and second coupling components is provided in the gap between the first coupling component and the second coupling component. Therefore, the load input into the vehicle body can be quickly transferred to the battery housing side via the protrusion to disperse the load. Therefore, the impact resistance during a collision can be improved.

[0014] A battery mounting structure according to a second aspect is, in the first aspect,

[0015] A support member is further provided, the support member extending from the side of the battery case to the vehicle body side,

[0016] The second coupling member is coupled to the battery case via the supporting member.

[0017] In the battery mounting structure involved in the second embodiment, the battery housing and the second coupling member are combined together by a supporting member extending from the side of the battery housing to the vehicle body. As a result, the coupling portion between the vehicle body and the battery housing can be arranged on the side of the battery housing. Moreover, compared with the structure in which the battery housing is elastically supported from the lower side of the vehicle, the mounting space of the battery housing can be reduced in the height direction of the vehicle. As a result, the space efficiency of the lower part of the vehicle is improved. Moreover, it is easy to expand the cabin space set on the floor or ensure the height of the bottom surface of the vehicle body.

[0018] A battery mounting structure according to a third aspect is, in the second aspect,

[0019] The supporting member comprises:

[0020] a first support portion disposed on the vehicle outer side relative to the second coupling member;

[0021] The second support portion is arranged on the vehicle inner side relative to the second connecting member.

[0022] In the battery mounting structure involved in the third embodiment, the support component has a first support portion and a second support portion. The first support portion is arranged on the outside of the vehicle relative to the second coupling component. The second support portion is arranged on the inside of the vehicle relative to the second coupling component. As a result, the load input into the lower part of the vehicle will be quickly transmitted to the battery housing side via the first support portion. Therefore, the impact resistance during a collision can be improved.

[0023] A battery mounting structure according to a fourth aspect is, in any one of the first to third aspects,

[0024] The tip of the protrusion is separated from the opposing surface.

[0025] In the battery mounting structure involved in the fourth aspect, the top of the protrusion is separated from the opposing surface. Therefore, when the vehicle body and the battery housing vibrate, the top of the protrusion does not interfere with the opposing surface. As a result, when the vehicle body and the battery housing vibrate, the generation of abnormal sound caused by the contact between the protrusion and the opposing surface can be suppressed.

[0026] A fifth aspect is a battery mounting structure according to any one of the first to third aspects, wherein

[0027] The first connecting member and the second connecting member are formed into a cylindrical shape with the vertical direction of the vehicle as the axial direction.

[0028] The first combining component is inserted into the inner side of the second combining component,

[0029] The elastic component has:

[0030] a first elastic portion disposed on one axial side relative to the protruding portion;

[0031] The second elastic portion is arranged on the other axial side with respect to the protruding portion.

[0032] In the battery mounting structure involved in the fifth embodiment, the first coupling component and the second coupling component are formed into a cylindrical shape with the vertical direction of the vehicle as the axial direction. In addition, the first coupling component is inserted into the inner side of the second coupling component. In addition, the elastic component has a first elastic portion arranged on one side of the axial direction relative to the protrusion and a second elastic portion arranged on the other side of the axial direction. Thus, the vibration in the vertical direction (gravity direction) of the vehicle using the weight of the battery housing can be stabilized.

[0033] As described above, according to the battery mounting structure according to the present invention, the vibration of the vehicle body can be suppressed and the impact resistance performance during a collision can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings, in which like symbols represent like elements, and in which:

[0035] Figure 1 This is a schematic diagram of a vehicle body of the vehicle according to the embodiment when viewed from the vehicle width direction.

[0036] Figure 2 This is a schematic diagram of a connection portion between a vehicle body and a battery case of a vehicle according to an embodiment when viewed from the lower side of the vehicle.

[0037] Figure 3 To indicate along Figure 2 A cross-sectional view of the state cut along line III-III.

[0038] Figure 4 It is a cross-sectional view showing the first connecting member and the second connecting member according to the embodiment in an enlarged manner.

[0039] Figure 5 2 is a cross-sectional view showing a first connecting member and a second connecting member according to a first modification example.

[0040] Figure 6 2 is a cross-sectional view showing a first connecting member and a second connecting member according to a second modification example. DETAILED DESCRIPTION

[0041] A vehicle 10 having a battery mounting structure according to an embodiment will be described with reference to the accompanying drawings. In addition, the arrow mark UP recorded in each of the drawings indicates the upper side in the vehicle vertical direction. The arrow mark FR recorded in each of the drawings indicates the front side in the vehicle front-rear direction. The arrow mark LH recorded in each of the drawings indicates the left side in the vehicle width direction. The up-down direction and the left-right direction in the following description respectively mean the up-down direction in the vehicle vertical direction and the left-right direction in the vehicle width direction.

[0042] Body

[0043] Figure 1 1 is a schematic diagram of a vehicle body 12 constituting a frame of a vehicle 10 when viewed from the vehicle width direction. As shown in the figure, the vehicle body 12 includes a lower side sill 14 constituting a frame of a lower portion of the vehicle. The lower side sill 14 is formed in a hollow beam shape extending in the vehicle front-rear direction. The lower side sill 14 is arranged in a pair at intervals in the vehicle width direction.

[0044] The rocker 14 is composed of a rocker outer member 16 made of a metal sheet and a rocker inner member 18 made of a metal sheet. The rocker outer member 16 is arranged on the outer side in the vehicle width direction. The rocker inner member 18 is arranged on the inner side in the vehicle width direction relative to the rocker outer member 16. Figure 3As shown, the lower side beam outer member 16 has a substantially hat-shaped cross-sectional shape that opens inwardly in the vehicle width direction. Flanges are formed on the upper end and the lower end of the lower side beam outer member 16. The lower side beam inner member 18 has a substantially hat-shaped cross-sectional shape that opens outwardly in the vehicle width direction. Flanges are formed on the upper end and the lower end of the lower side beam inner member 18. The lower side beam 14 overlaps the lower side beam outer member 16 and the lower side beam inner member 18 in the vehicle width direction, and the flanges at the upper end and the flanges at the lower end are joined together by welding or the like. Thus, the lower side beam 14 becomes a structure with a closed cross-sectional shape formed by the upper wall portion 14A, the lower wall portion 14B, the outer wall portion 14C and the inner wall portion 14D to form a rectangular shape. The upper wall portion 14A constitutes the upper surface. The lower wall portion 14B constitutes the lower surface. The outer wall portion 14C connects the outer ends of the upper wall portion 14A and the lower wall portion 14B to each other. The inner wall portion 14D connects the inner end portions of the upper wall portion 14A and the lower wall portion 14B to each other.

[0045] Floor panels

[0046] A floor panel 20 made of a metal plate is disposed inside the pair of left and right side rails 14. The floor panel 20 extends in the vehicle front-rear direction and the vehicle width direction and constitutes the floor of the vehicle compartment. The outer periphery of the floor panel 20 is joined to the upper wall portion 14A of the left and right side rails 14 and a transverse member (not shown) spanned between the side rails 14 by welding or the like.

[0047] Battery housing

[0048] A battery case 24 containing a plurality of secondary batteries is mounted below the floor panel 20. The battery case 24 is formed in a flat rectangular box shape. The battery case 24 extends in the vehicle front-rear direction and the vehicle width direction. Figure 3 As shown, the battery case 24 is composed of a box-shaped lower case 26 opened toward the upper side of the vehicle, and a box-shaped upper case 28 opened toward the lower side of the vehicle. The battery case 24 is formed in such a way that the outer periphery of the lower case 26 and the outer periphery of the upper case 28 are joined in the vertical direction of the vehicle. The lower case 26 and the upper case 28 can be composed of metal plates, laminated films, etc.

[0049] Joint

[0050] Back to Figure 1 The outer periphery of the battery case 24 is connected to the vehicle body 12 via a plurality of connecting portions 30. In the present embodiment, as an example, the connecting portions 30 are provided at the front and rear ends of each rocker 14 in the vehicle front-rear direction. The vehicle body 12 is connected to the battery case 24 at a total of four locations.

[0051] exist Figure 2, a state of a joint 30 where a rocker 14 and a battery case 24 are joined together, which are arranged on the left side of the vehicle 10, is shown as viewed from the lower side of the vehicle. As shown in the figure, the rocker 14 and the battery case 24 are connected together via a long support member 32 in the vehicle width direction.

[0052] like Figure 3 As shown, the support member 32 is formed in a hollow beam shape and extends in the vehicle width direction.

[0053] The end of the support member 32 on the inner side in the vehicle width direction is connected to one end of the bracket 22 extending from the battery case 24 using a bolt 38 and a nut 39. The other end of the bracket 22 is connected to the bottom wall portion 24A constituting the lower surface of the battery case 24. In this state, the support member 32 is arranged so as to face the side wall portion 24B of the battery case 24. In addition, the support member 32 extends from the side of the battery case 24 to the side of the rocker 14.

[0054] The end portion of the support member 32 on the outer side in the vehicle width direction is connected to the lower wall portion 14B of the rocker 14 via the first connecting member 40, the second connecting member 42 and the elastic member 60. In this state, the bottom wall portion 24A of the battery case 24 is set at a position lower than the height of the lower wall portion 14B of the rocker 14.

[0055] The first connecting member 40 is connected to the lower wall portion 14B of the rocker 14 using bolts 44 and nuts 45. The first connecting member 40 is a metal cylindrical member with the vehicle vertical direction as the axial direction. For example, the first connecting member 40 can be formed by a cylindrical collar.

[0056] like Figure 4 As shown, a bolt 44 is inserted from the lower side of the vehicle into the first connecting member 40. The tip of the bolt 44 is inserted into a bolt hole 48 formed in the lower wall portion 14B of the rocker 14. The tip of the bolt 44 is configured to be screwed with a nut 45 welded around the bolt hole 48.

[0057] The second coupling member 42 is coupled to the battery case 24 side via the support member 32. The second coupling member 42 is a metal cylindrical member with the vehicle vertical direction as the axial direction. For example, the second coupling member 42 can be formed by a cylindrical collar having a larger diameter than the first coupling member. In addition, the second coupling member 42 is set to have an axial length shorter than the first coupling member 40.

[0058] The second coupling member 42 is inserted into the first coupling member 40 from the inside and is attached so as to provide a first gap G1 with respect to the first coupling member 40 .

[0059] In addition, the second coupling member 42 has a protrusion 50 provided in the middle portion in the axial direction. The protrusion 50 is provided so as to protrude from the inner peripheral surface of the second coupling member 42 toward the first gap G1. The top end 50A of the protrusion 50 is arranged to be close to the first coupling member 40. The top end 50A of the protrusion 50 is separated from the opposing surface (outer peripheral surface) of the first coupling member 40. A second gap G2 is provided between the top end 50A of the protrusion 50 and the first coupling member 40.

[0060] In addition, the protrusion 50 may be formed in a ring shape or in an island shape. In addition, when the protrusion 50 is formed in an island shape, a plurality of protrusions 50 may be arranged along the circumferential direction of the second coupling member 42 .

[0061] The second coupling member 42 is inserted into the inner side of the penetration portion 52 formed on the support member 32. The penetration portion 52 is a through hole that penetrates the support member 32 in the vehicle vertical direction. When the second coupling member 42 is inserted into the penetration portion 52, a portion of the outer peripheral surface is coupled to the support member 32 by welding or the like. Thus, the second coupling member 42 is coupled to the battery case 24 via the support member 32.

[0062] The support member 32 includes a first support portion 34 disposed on the vehicle outer side relative to the second coupling member 42, and a second support portion 36 disposed on the vehicle inner side relative to the second coupling member 42. Here, the second support portion 36 disposed between the second coupling member 42 and the battery case 24 has a higher rigidity than the first support portion 34.

[0063] Here, the details of the support member 32 are described. The cross section of the support member 32 in the direction perpendicular to the extension direction (the front-rear direction of the vehicle) is a closed cross section of a rectangular shape. In addition, a plate-shaped first reinforcement portion 32C is provided inside the support member 32 to connect the upper surface portion 32A and the lower surface portion 32B in the up-down direction. Inside the support member 32, a plurality of first reinforcement portions 32C are provided along the extension direction. The plurality of first reinforcement portions 32C divide the inside of the support member 32 into a plurality of spaces. Therefore, the cross section of the support member 32 along the extension direction is lattice-shaped.

[0064] In addition, a plurality of second reinforcing portions 32D are provided inside the support member 32 to connect the adjacent first reinforcing portions 32C. The second reinforcing portion 32D is a plate-shaped member that connects the upper end and the lower end of the adjacent first reinforcing portion 32C. The second reinforcing portion 32D increases the rigidity of the closed cross section formed by the upper surface portion 32A, the lower surface portion 32B, and the first reinforcing portion 32C. The second reinforcing portion 32D is formed only in the second support portion 36 of the support member 32. In this way, in the support member 32, the rigidity of the second support portion 36 is increased compared to the first support portion 34.

[0065] When a load is input to the first support portion 34 of the support member 32 due to a side collision of the vehicle 10, the load is transmitted to the battery case 24 via the first support portion 34, the second coupling member 42, and the second support portion 36. At this time, in the first support portion 34, the closed cross section formed by the upper surface portion 32A, the lower surface portion 32B, and the first reinforcement portion 32C is deformed to absorb the impact. On the other hand, in the second support portion 36, the deformation of the closed cross section formed by the upper surface portion 32A, the lower surface portion 32B, and the first reinforcement portion 32C is suppressed by the second reinforcement portion 32D. Thus, the load is dispersed by quickly transmitting the load from the second support portion 36 to the battery case 24. In addition, the deformation of the lower side beam 14 toward the inside of the vehicle compartment can be suppressed.

[0066] like Figure 4 As shown, the elastic member 60 is arranged in the first gap G1 provided between the first coupling member 40 and the second coupling member 42 .

[0067] The elastic member 60 is composed of a first elastic portion 62 arranged on one axial side (the upper side of the vehicle) relative to the protrusion 50 of the second coupling member 42, and a second elastic portion 64 arranged on the other axial side (the lower side of the vehicle) relative to the protrusion 50. The first elastic portion 62 and the second elastic portion 64 can be formed, for example, by a cylindrical bushing formed of an elastic material such as rubber. The first elastic portion 62 and the second elastic portion 64 are symmetrically arranged in the axial direction, for example, with the protrusion 50 as the center.

[0068] The first elastic portion 62 is interposed between the first coupling member 40 and the second coupling member 42 in the first gap G1 formed on the upper side of the protrusion 50, and the axial end of the first elastic portion 62 covers a portion of the upper surface of the second coupling member 42. The second elastic portion 64 is interposed between the first coupling member 40 and the second coupling member 42 in the first gap G1 formed on the lower side of the protrusion 50, and the axial end of the second elastic portion 64 covers a portion of the lower surface of the second coupling member 42. The first elastic portion 62 and the second elastic portion 64 are configured to elastically deform following the axial displacement of the second coupling member 42.

[0069] Function and effect

[0070] According to the structure described above, in this embodiment, the battery case 24 mounted under the floor of the vehicle 10 is elastically supported on the vehicle body 12 via the joint 30. Therefore, the battery case 24, which is a heavy object, functions as a dynamic damper, thereby being able to suppress the vibration of the vehicle body 12 when the vehicle 10 is traveling.

[0071] Specifically, the elastic member 60 is interposed between the first connecting member 40 connected to the vehicle body 12 and the second connecting member 42 connected to the battery case 24. The elastic member 60 functions as a spring member having a predetermined spring constant.

[0072] The relationship between the vibration frequency f [Hz] of the dynamic damper using the battery case 24 as a mass body, the mass M [kg] of the battery case 24 , and the spring constant K [N / m] of the elastic member 60 can be expressed by the following equation (1).

[0073] Formula 1

[0074]

[0075] Here, in the vibration characteristics of the vehicle body 12 at resonance, there is a peak frequency [Hz] corresponding to the peak of the vibration level [dB]. Therefore, in the dynamic damper using the battery case 24 as a mass body, the spring constant K [N / m] of the elastic member 60 is set according to the mass M [kg] of the battery case 24 so that the frequency f [Hz] of the battery case 24 becomes equal to the peak frequency. This can improve the vibration absorption effect of the bending vibration of the vehicle body 12.

[0076] Furthermore, in the present embodiment, a protrusion 50 protruding from the second coupling member 42 is provided in the gap provided between the first coupling member 40 and the second coupling member 42. Therefore, the load input to the vehicle body 12 (rocker 14) can be quickly transmitted to the battery case 24 side via the protrusion 50 and the load can be dispersed. Therefore, the impact resistance performance at the time of collision can be improved.

[0077] In addition, in the present embodiment, the battery housing 24 is combined with the second combining member 42 via a supporting member 32 extending from the side of the battery housing 24 to the vehicle body 12. Thus, the combining portion 30 between the vehicle body 12 and the battery housing 24 can be arranged on the side of the battery housing 24. Moreover, compared with a structure in which the battery housing 24 is elastically supported from the lower side of the vehicle, the mounting space of the battery housing 24 can be reduced in the vehicle height direction. As a result, the space efficiency of the lower part of the vehicle is improved. Furthermore, it is easy to expand the cabin space provided on the floor panel 20 or ensure the height of the bottom surface of the vehicle body.

[0078] Furthermore, in the present embodiment, the support member 32 includes a first support portion 34 disposed on the vehicle outer side relative to the second coupling member 42, and a second support portion 36 disposed on the vehicle inner side relative to the second coupling member 42. Thus, the load input to the lower portion of the vehicle is rapidly transmitted to the battery case 24 side via the first support portion 34. Therefore, the impact resistance during a collision is improved.

[0079] Further, in this embodiment, if Figure 3 As shown, the battery case 24, the support member 32, the second connecting member 42, the protrusion 50 and the first connecting member 40 are arranged in the vehicle width direction at a predetermined height position in the vehicle vertical direction. Therefore, the impact resistance performance of the vehicle in a side collision can be improved.

[0080] In addition, in the present embodiment, the top end and the opposing surface of the protrusion 50 are separated. Therefore, when the vehicle body 12 and the battery case 24 vibrate, the top end of the protrusion 50 does not interfere with the opposing surface. Thus, when the vehicle body 12 and the battery case 24 vibrate, the generation of abnormal sound caused by the contact between the protrusion 50 and the opposing surface can be suppressed.

[0081] In addition, the elastic member 60 is not disposed in the second gap G2 provided between the protruding portion 50 and the opposing surface. Therefore, when the load during the collision is transmitted from the first coupling member 40 to the second coupling member 42, the top end of the protruding portion 50 directly contacts the opposing surface. Thus, the load can be transmitted on the contact surface in a state of metal contact. Therefore, it is not easy to cause deviation on the contact surface, so that the load transmission efficiency can be improved.

[0082] In addition, in the present embodiment, the first coupling member 40 and the second coupling member 42 are formed into a cylindrical shape with the vehicle vertical direction as the axial direction. Furthermore, the elastic member 60 includes a first elastic portion 62 arranged on one side of the axial direction relative to the protrusion 50 and a second elastic portion 64 arranged on the other side of the axial direction. Thus, the vibration in the vehicle vertical direction (gravity direction) using the weight of the battery case 24 can be stabilized.

[0083] About the change example

[0084] The battery mounting structure according to the embodiment has been described above. However, the present invention is not limited to the structure described in the above embodiment. Each structure of the above embodiment can be appropriately changed as long as it does not depart from the gist of the invention.

[0085] First change example

[0086] For example, in the above-mentioned embodiment, the protrusion 50 is configured to protrude from the second coupling member 42 into the first gap G1. However, the present invention is not limited thereto. Figure 5 As shown in the figure, the protrusion 50 may be configured to protrude from the first coupling member 40 into the first gap G1 .

[0087] In the first modification, the tip 50A of the protruding portion 50 is provided apart from the facing surface (inner peripheral surface) of the second coupling member 42 .

[0088] Second modification example

[0089] In the above embodiment, the protrusion 50 is provided at the middle portion in the axial direction of the second coupling member 42. However, the present invention is not limited thereto. Figure 6 As shown in the figure, a structure in which the protrusion 50 is provided at the axial end of the second coupling member 42 may be adopted.

[0090] In the second modified example, the protrusion 50 is provided at the lower end portion in the axial direction of the second coupling member 42 , and the elastic member 60 is arranged above the protrusion 50 .

[0091] Although not shown in the drawings, a configuration may be adopted in which the protrusion 50 is provided at the upper end portion in the axial direction of the second coupling member 42 , and the elastic member 60 is disposed below the protrusion 50 .

[0092] In addition, although in the above embodiment, a structure is adopted in which the battery case 24 is elastically supported at the joint 30 between the lower side rail 14 and the battery case 24, the present invention is not limited thereto. The structure of the joint 30 of the above embodiment can also be applied to the joint between the frame member of the lower part of the vehicle and the battery case. For example, it can also be applied to the joint between the cross member extending in the vehicle width direction and the battery case.

[0093] In addition, although in the above-mentioned embodiment, a structure is adopted in which the first coupling member 40 and the vehicle body 12 are coupled by bolts and nuts, they may be coupled by welding. In addition, although a structure is adopted in which the battery case 24 and the support member 32 are coupled via a bracket, it is not limited thereto. For example, the end of the support member 32 in the extension direction may be coupled to the side wall portion 24B of the battery case 24 by welding. In addition, for example, the upper surface of the support member 32 may be coupled to the flange of the joint portion of the lower case 26 and the upper case 28 provided with the battery case 24 by bolts and nuts.

Claims

1. A battery mounting structure, comprising: the body, which forms the frame of the vehicle; A battery housing, which is combined with the vehicle body and mounted under the floor of the vehicle; a first coupling member coupled to the vehicle body side at a coupling portion between the vehicle body and the battery housing; a second coupling member coupled to the battery case side and mounted in a manner that a predetermined gap is provided with respect to the first coupling member; an elastic member disposed in the gap and interposed between the first coupling member and the second coupling member; A protrusion is provided to protrude from one of the first coupling member and the second coupling member into the gap.

2. The battery mounting structure according to claim 1, wherein: A support member is further provided, the support member extending from the side of the battery case to the vehicle body side, The second coupling member is coupled to the battery case via the supporting member.

3. The battery mounting structure according to claim 2, wherein: The supporting member comprises: a first support portion disposed on the vehicle outer side relative to the second coupling member; The second support portion is arranged on the vehicle inner side relative to the second connecting member.

4. The battery mounting structure according to any one of claims 1 to 3, wherein: The tip of the protrusion is separated from the opposing surface.

5. The battery mounting structure according to any one of claims 1 to 3, wherein: The first connecting member and the second connecting member are formed into a cylindrical shape with the vertical direction of the vehicle as the axial direction. The first combining component is inserted into the inner side of the second combining component, The elastic component has: a first elastic portion disposed on one axial side relative to the protruding portion; The second elastic portion is arranged on the other axial side with respect to the protruding portion.

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