JP2013014276A - Battery support structure of electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery support structure of an electric vehicle, striking a balance between the secured rigidity of a floor of a vehicle interior and improvement in support rigidity for a battery provided below the floor, and capable of reliably dispersing a load imparted from the front of the vehicle.SOLUTION: A protrusion 52 protruding downward from a floor surface 51 and extending in a vehicle front-rear direction is provided at a vehicle width direction central part of a floor panel 5 of a vehicle interior 3. The protrusion 52 is provided with a battery fitting hole 52a capable of fitting a fitting protrusion 21 of the battery 20, as a support part for supporting a battery 20. A front side frame 6 extending in the vehicle front-rear direction at the vehicle front of the vehicle interior 3 is provided, and a rear end of the front side frame 6 is connected to a front end of the protrusion 52.

Description

  The present invention relates to a battery support structure for an electric vehicle in which a battery is disposed below a floor of a passenger compartment.

  2. Description of the Related Art Conventionally, a battery that is an auxiliary machine for an electric vehicle is provided below a floor of a passenger compartment (see Patent Document 1 below). In Patent Document 1 described below, a battery is housed in a battery case made up of a tray member and a cover member. The battery case is fastened to a side member or a cross member on the vehicle body side, so that the battery is placed below the floor. Supported by the car body.

JP 2009-143446 A

  By the way, on the floor of the passenger compartment, the rigidity of the entire floor is secured by increasing the rigidity of the central portion in the vehicle width direction in the vehicle front-rear direction.

  In the case of Patent Document 1, as described above, the battery support rigidity is improved by fastening the battery case to the side member or the cross member. However, the battery support structure including the battery case, the side member, and the cross member is not connected to the center of the floor in the vehicle width direction and the vehicle front-rear direction. There is a problem in that it cannot sufficiently contribute to the rigidity of the center of the floor in the vehicle width direction. Therefore, in the said patent document 1, the structure for ensuring the rigidity of a floor was needed separately.

  Conventionally, from the viewpoint of reliably protecting passengers in the passenger compartment, there is a problem of how to distribute the load input from the front of the vehicle due to a frontal collision of the vehicle. However, Patent Document 1 does not disclose any configuration for dispersing the load.

  The present invention provides an electric vehicle capable of ensuring the rigidity of the floor of the passenger compartment and improving the support rigidity of the battery disposed below the floor, and can reliably distribute the load input from the front of the vehicle. An object is to provide a battery support structure.

  In the battery support structure for an electric vehicle according to the present invention, a protrusion that protrudes downward from the floor surface and extends in the vehicle front-rear direction is provided at the center of the vehicle compartment floor in the vehicle width direction. And a front side frame that extends in the vehicle front-rear direction in front of the vehicle in the passenger compartment, and a rear end portion of the front side frame is connected to a front end portion of the protruding portion.

  According to this configuration, the protrusion at the center portion in the vehicle width direction of the floor is provided with a protrusion portion that protrudes downward from the floor surface and extends in the vehicle front-rear direction. And the rigidity of the entire floor can be secured. Furthermore, by providing a support part for supporting the battery in the projecting part, the support rigidity of the battery can be improved using the projecting part. That is, it is possible to achieve both of ensuring the rigidity of the floor and improving the support rigidity of the battery.

  Then, by connecting the rear end portion of the front side frame and the front end portion of the protruding portion, the load input to the front side frame from the front of the vehicle can be reliably transmitted and distributed to the rear of the vehicle via the protruding portion. it can.

  In one embodiment of the present invention, a subframe that supports a suspension of the front wheel is provided below the front side frame, and a front end portion of the subframe is connected to a lower portion of the front side frame. The rear end portion is connected to the front end portion of the protruding portion.

  According to this configuration, the load input to the front side frame from the front of the vehicle can be distributed to the sub frame, and the load is reliably transmitted to the rear of the vehicle while reducing the load on the front side frame. Can do.

  In one embodiment of the present invention, a cross member extending in the vehicle width direction is provided on the lower surface portion of the floor, and a front and rear support portion for supporting the vehicle front-rear direction end of the battery is provided on the cross member. is there.

  According to this configuration, the position of the battery in the longitudinal direction of the vehicle can be regulated using the cross member. For this reason, a battery can be supported stably.

  Furthermore, when a load is input from the front of the vehicle, the load can be transmitted to the rear of the vehicle via the cross member and the battery. That is, the battery can function as a load transmission member, and the load can be efficiently distributed in the vehicle width direction and the rear of the vehicle.

  In one embodiment of the present invention, a side panel is provided on the outer side in the vehicle width direction of the battery that is supported by the support portion, and an impact absorbing member is provided on the inner side in the vehicle width direction of the side panel. Is.

  According to this configuration, for example, a load input from the side of the vehicle at the time of a side collision of the vehicle can be absorbed by the impact absorbing member, and the battery can be reliably protected from the load.

  In one embodiment of the present invention, a side sill having a closed cross section extending in the vehicle front-rear direction is provided above the end of the floor in the vehicle width direction.

  According to this configuration, it is possible to ensure a long space in the vehicle width direction for installing the space for storing the battery and the impact absorbing member. For this reason, the battery capacity and the shock absorption amount can be sufficiently secured.

  According to this invention, while ensuring the rigidity of the floor of a vehicle interior and the improvement of the support rigidity of the battery arrange | positioned under this floor, the load input from the vehicle front can be disperse | distributed reliably.

The perspective view which shows the electric vehicle provided with the battery support structure which concerns on embodiment of this invention. The top view which shows the electric vehicle provided with the battery support structure. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. FIG. 3 is a sectional view taken along line B-B in FIG. 2. The CC sectional view taken on the line of FIG. Sectional drawing which shows the attachment structure of a lower support member. The disassembled perspective view which shows the attachment structure of a floor cover. The top view for demonstrating the load transmission path | route at the time of vehicle front collision. The sectional side view for demonstrating the load transmission path | route at the time of vehicle front collision. Sectional drawing which shows the battery support structure which concerns on other embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing an electric vehicle provided with a battery support structure according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. 3 to 5 are a cross-sectional view taken along line AA, a cross-sectional view taken along line BB, and a cross-sectional view taken along line CC in FIG. 2, respectively. FIG. FIG. 7 is an exploded perspective view showing the floor cover mounting structure. In the drawing, the arrow (F) indicates the front of the vehicle body, and the arrow (R) indicates the rear of the vehicle body.

  As shown in FIGS. 1 to 3 and 7, the electric vehicle 1 according to this embodiment includes motors 2 and 2 as vehicle auxiliary machines that rotate the rear wheels Wr at the rear of the vehicle. The vehicle can be driven using 2 as a drive source.

  Further, the electric vehicle 1 is provided with a dash panel 4 at the front of the passenger compartment 3. The dash panel 4 is disposed so as to rise from the front end portion of the floor panel 5 that forms the floor surface 51 of the passenger compartment 3, and constitutes a front wall portion of the passenger compartment 3.

  A front side frame 6 extending in the vehicle front-rear direction is disposed in front of the vehicle from the passenger compartment 3. The front side frame 6 has a pair of left and right side frame portions 61, 61 extending in the vehicle front-rear direction, and a connecting portion 62 that is located behind the side frame portions 61, 61 and connects the rear end portions thereof. It is substantially Y-shaped in plan view.

  Further, in the present embodiment, a hollow cross-section projecting portion 52 that projects downward from the floor surface 51 and extends in the vehicle front-rear direction is provided at the center in the vehicle width direction of the floor panel 5, as shown in FIG. The rear end portion of the connecting portion 62 of the front side frame 6 is connected to the front end portion of the protruding portion 52 via the dash panel 4.

  Further, a sub-frame 8 for supporting a lower arm 7 constituting a suspension device for the front wheel Wf is disposed below the front side frame 6. The front end of the sub frame 8 is connected to the lower part of the front side frame 6 via a connecting member 9, and the rear end of the sub frame 8 is projected by a fastening member 10 such as a bolt or a nut (see FIGS. 2 and 3). The front end of the part 52 is connected.

  In addition, on the lower surface portion of the floor surface 51, a pair of left and right torque box members 11, 11 extending from the connecting portion toward the outside in the vehicle width direction are disposed at the connecting portion between the front side frame 6 and the protruding portion 52. The floor panel 5 and the torque box member 11 form closed sections 12 and 12 extending in the vehicle width direction. Here, the torque box member 11 has an arc shape in accordance with the shape of the wheel house 13 (see FIG. 4) covering the front wheel Wf, as shown in FIG. 1, FIG. 2, and FIG. The cross-sectional area of the closed cross-section 12 is formed so as to gradually decrease toward the outside in the vehicle width direction.

  In addition, a pair of left and right cross members 14, 14 extending from the side surface portion of the projecting portion 52 toward the outside in the vehicle width direction are disposed on the lower surface portion of the floor surface 51 on the rear side of the torque box members 11, 11. The floor panel 5 and the cross member 14 form a closed section 15 that extends in the vehicle width direction.

  On the other hand, as shown in FIGS. 1 to 3 and FIGS. 5 to 7, cross members 16, 16 extending in the vehicle width direction are disposed on the upper surface portion of the floor surface 51, and the floor panel 5 and the cross member 16 A closed cross-section 17 (see FIG. 3) having the same cross-sectional shape continuous along the vehicle width direction is formed. Here, the continuous closed cross section means that it extends continuously over substantially the entire width of the vehicle body without being interrupted by the projecting portion 52 like the closed cross sections 12 and 15.

  A rear frame 18 is disposed behind the cross members 14 and 14 in the vehicle. The rear frame 18 includes a cross member portion 18a extending in the vehicle width direction, and a pair of left and right rear side frame portions 18b extending from a part of the cross member portion 18a and extending rearward of the vehicle. 5 forms a closed section 19.

  Further, below the floor panel 5, between the above-described torque box member 11 and the cross member 14, and between the cross member 14 and the cross member portion 18a, the vehicular auxiliary machine serving as the power source of the above-described motor 2. The battery storage part 30 which stores the battery 20 as this is provided, and in this embodiment, this battery storage part 30 is provided in a total of four places, two places each on the right and left sides. A communication portion 31 that connects the battery storage portion 30 to the outside of the vehicle is formed at an outer end portion of the battery storage portion 30 in the vehicle width direction, and the battery 20 can be attached to and detached from the side of the vehicle by the communication portion 31. Is possible.

  Further, a battery fitting hole 52 a is formed on the side surface of the protruding portion 52 corresponding to the position of the battery storage portion 30.

  On the other hand, the battery 20 has a fitting convex portion 21 as shown in FIGS. 1, 2, and 5 on a part of its side surface, and the fitting convex portion 21 corresponds to the protrusion 52 described above. The battery can be fitted into the battery fitting hole 52a. A connector 22 as a connection terminal is attached to the fitting convex portion 21.

  In the present embodiment, the battery fitting hole 52a functions as a support portion that supports the side surface portion of the battery 20 by fitting the fitting convex portion 21 of the battery 20 into the battery fitting hole 52a. The battery 20 can be supported by the vehicle body by the fitting.

  Further, a cable 32 that can be connected to the connector 21 of the battery 20 is disposed in the hollow portion of the protruding portion 52, and is connected to an inverter 34 and a charger 35 described later via a junction box 33.

  Here, in addition to the inverter 34 and the charger 35, the motors 2 and 2 are disposed in a space surrounded by the cross member portion 18a and the rear side frame portion 18b. Among these, the motors 2 and 2 are supported by the rear side frame portion 18b by a support member 36 extending in the vehicle width direction, and are connected to the rear wheel Wr via a drive shaft 37 that transmits the driving force of the motor 2. Yes.

  The inverter 34 is connected to the motors 2 and 2 so as to control the rotational speed and torque of the motor 2 in accordance with the operation of an accelerator pedal (not shown) of the occupant. The charger 35 is a connecting member that can be connected to a power source outside the vehicle (for example, a household power source), and can charge the battery 20 with power supplied from the power source outside the vehicle.

  The torque box member 11, the cross member 14, and the cross member portion 18 a located in the front and rear of the battery 20 stored in the battery storage portion 30 are provided with front and rear guide support members 38 in the vicinity of the communication portion 31, respectively. A lower support member 39 extending in the vehicle width direction is disposed inside the front and rear guide support member 38 in the vehicle width direction.

  As shown in FIGS. 1 to 6, the front and rear guide support member 38 and the lower support member 39 are substantially L-shaped in a side view according to the shape of the corner of the battery 20, thereby In addition, the vehicle front-rear direction and the vertical position of the battery 20 are regulated.

  The front and rear guide support members 38 are fixed to the outer ends in the vehicle width direction of the torque box member 11, the cross member 14, and the cross member portion 18a. On the other hand, as shown in FIGS. 5 and 6, the lower support member 39 is provided in common to the pair of left and right batteries 20, 20, and extends outward from the protrusion 52 in the vehicle front-rear direction. And the vehicle width direction center part is fastened by the bottom face part of the protrusion part 52 by fastening members 40, such as a volt | bolt and a nut. The battery 20 is supported at the vehicle front-rear direction end by the front-rear guide support member 38 and is also supported from below by the lower support member 39.

  Although not shown in FIG. 1 for the sake of convenience, a side sill 41 extending in the vehicle front-rear direction is provided above the end of the floor panel 5 in the vehicle width direction, as shown in FIGS. As shown in FIG. 5, the side sill 41 has a closed cross-sectional shape by a side sill inner 41 a and a side sill outer 41 b, and forms a lower edge part of a passenger opening 42 formed on the side part of the passenger compartment 3. Yes.

  Although not shown in FIG. 1 for the sake of convenience, the occupant opening 42 is provided with a side door 43 for opening and closing the occupant opening 42, as shown in FIG. The opening 42 is provided below the side opening 42 (side door 43).

  And the side panel 44 is provided in the vehicle width direction outer side of the battery 20 in the state supported by the fitting with the battery fitting hole 52a, that is, the vehicle width direction outer side of the battery storage unit 30. The side panel 44 can be attached to and detached from the side sill 41. By attaching the side panel 44 to the side sill 41, the communication portion 31 is covered by the side panel 44 as shown in FIG. An impact absorbing member 45 is provided on the inner side in the vehicle width direction of the side panel 44.

  Although not shown in FIGS. 1 to 6 for the sake of convenience, a floor cover 46 that covers the hollow portion of the protruding portion 52 from the inside of the passenger compartment 3 is provided at the center of the floor panel 5 in the vehicle width direction. The floor cover 46 and the floor surface 51 form a substantially continuous floor surface. The floor cover 46 is detachably attached to the floor panel 5 by fastening members 47 such as bolts and nuts.

  In the case of the present embodiment, when the battery 20 is attached to the vehicle body, the side panel 44 is first removed from the side sill 41 to open the communication portion 31 and the floor cover 46 is removed from the floor panel 5 to Open the hollow.

  Next, the battery 20 is inserted from the communication unit 31. At this time, the battery 20 is pushed inward in the vehicle width direction along the front / rear guide support member 38 provided in the vicinity of the communication portion 31. As a result, the front / rear guide support member 38 functions as a guide portion that guides the battery 20 from the communication portion 31 toward the battery storage portion 30. The guide of the front / rear guide support member 38 moves the battery 20 to the battery storage portion 30. It can be placed at a predetermined position. For this reason, the battery 20 stored in the battery storage unit 30 is appropriately supported by the front / rear guide support member 38 and the lower support member 39, and the fitting convex portion 21 is properly fitted in the battery fitting hole 52a. .

  And after fitting the fitting convex part 21 to the battery fitting hole 52a, the connector 22 inside a vehicle width direction is connected to the cable 32 arrange | positioned in the hollow part of the protrusion part 52. FIG. As a result, the battery 20 is connected to the cable 32 via the protrusion 52 (battery fitting hole 52a), and the inverter 34, the motor 2, and the charger 35 are electrically connected to the cable 32 and the junction box 33. Connected.

  In the present embodiment, the projecting portion 52 that protrudes downward from the floor surface 51 and extends in the vehicle front-rear direction is provided at the center portion in the vehicle width direction of the floor panel 5, whereby the rigidity in the center portion in the vehicle width direction of the floor panel 5 is increased. It can improve over the vehicle front-back direction, and the rigidity of the whole floor panel 5 can be ensured.

  Further, by providing the protrusion 52 with a battery fitting hole 52a for supporting the battery 20 and a lower support member 39, the support rigidity of the battery 20 can be improved using the protrusion 52. That is, both the rigidity of the floor panel 5 can be secured and the support rigidity of the battery 20 can be improved.

  Further, by providing a front and rear guide support member 38 for supporting the vehicle longitudinal direction end of the battery 20 on the torque box member 11, the cross member 14 and the cross member portion 18a extending in the vehicle width direction before and after the battery 20, The position of the battery 20 in the vehicle front-rear direction can be regulated using the torque box member 11, the cross member 14, and the cross member portion 18a. For this reason, the battery 20 can be stably supported.

  Further, in this case, when a load is input from the front of the vehicle due to a frontal collision of the vehicle, the load can be transmitted to the rear of the vehicle via the torque box member 11, the cross member 14, the cross member portion 18a, and the battery 20. It becomes possible. That is, the battery 20 can function as a load transmission member, and the load can be efficiently distributed in the vehicle width direction and the rear of the vehicle.

  Further, by providing the front / rear guide support member 38 that guides the battery 20 from the communication portion 31 toward the battery storage portion 20, the detachability of the battery 20 from the side of the vehicle can be improved.

  Moreover, the position of the battery 20 in the vertical direction can be restricted by providing the lower support member 39 that extends from the protrusion 52 outward in the vehicle width direction and supports the battery 20 from below. For this reason, the battery 20 can be stably supported.

  Further, in the case of the present embodiment, as a result of providing the protruding portion 52 below the floor surface 51, the cross member 16 that forms a continuous closed cross section along the vehicle width direction is provided above the floor surface 51. Is possible. Thus, by providing the cross member 16 that forms a continuous closed section along the vehicle width direction, for example, it exhibits high rigidity with respect to a load input from the side of the vehicle due to, for example, a side collision of the vehicle. Can do.

  Next, a case where a load is input from the front of the vehicle due to a frontal collision of the vehicle or the like will be considered with reference to FIGS. In this case, the load is input to the front side frame 6 mainly as indicated by a thick arrow in the figure, and is transmitted to the rear of the vehicle along this, and at the same time, a part of the load is lowered via the connecting member 9. It is also input to subframe 8. Then, the loads that are branched and input to the front side frame 6 and the subframe 8 merge at the front end portion of the projecting portion 52, and are transmitted and dispersed to the rear of the vehicle by the projecting portion 52.

  Further, at the connecting portion between the front side frame 6 and the projecting portion 52, as indicated by a thick arrow in the figure, a part of the load is moved outward in the vehicle width direction along the closed section 12 formed by the torque box member 11. It branches and is transmitted and distributed to the rear of the vehicle by members on the side of the vehicle such as the side sill 41, the side door 43, and the side panel 44 (see FIG. 5 and the like).

  As described above, in the present embodiment, the front end load input to the front side frame 6 is transmitted to the vehicle via the protrusion 52 by connecting the rear end of the front side frame 6 and the front end of the protrusion 52. It can be reliably transmitted and dispersed backwards. Therefore, in this case, the front impact load can be reliably dispersed while ensuring the rigidity of the floor panel 5.

  Further, by providing the connecting portion with the closed section 12 extending in the vehicle width direction, the load can be dispersed in the vehicle width direction via the closed section 12. As a result, the front collision load can be efficiently transmitted and dispersed to the rear of the vehicle. Further, by transmitting the load also to the side sill 41 and the side door 43 located above the floor surface 51, the load transmission path can be formed above and below the floor surface 51, and as a result, the load Can be dispersed vertically.

  Further, by connecting the front end portion of the sub-frame 8 to the lower portion of the front side frame 6 and connecting the rear end portion of the sub-frame 8 to the front end portion of the projecting portion 52, the load input to the front side frame 6 is achieved. Can also be distributed to the sub-frame 8, and the load can be reliably transmitted to the rear of the vehicle while reducing the load applied to the front side frame 6.

  In addition, the battery storage unit 30 is provided below the floor panel 5, and the communication unit 31 for connecting and disconnecting the battery 20 from the side of the vehicle is provided below the boarding opening 42 in the battery storage unit 30. Thus, the battery 20 can be replaced from the side of the vehicle with the side door 43 closed.

  Further, the side panel 44 is provided on the outer side in the vehicle width direction of the battery storage unit 30 and the shock absorbing member 45 is provided on the inner side in the vehicle width direction of the side panel 44. The load input from the direction can be absorbed by the shock absorbing member 45, and the battery 20 can be reliably protected from the load.

  Further, by providing the side sill 41 above the end of the floor panel 5 in the vehicle width direction, it is possible to ensure a long length in the vehicle width direction for installing the battery storage unit 30 and the impact absorbing member 45. For this reason, the capacity | capacitance and shock absorption amount of the battery 20 are fully securable.

  Further, the cable 32 that electrically connects the battery 20 and the vehicular auxiliary machine (in this case, the inverter 34, the motor 2, and the charger 35) is provided in the hollow portion of the projecting portion 52, so that the projecting portion 52 is hollow. The portion can be used as a space for connecting the battery 20 and the vehicular auxiliary machine. Therefore, in this case, it is possible to secure an installation space for the connection member (here, the cable 32) that connects the battery 20 and the vehicle auxiliary machine while securing the rigidity of the floor panel 5.

  Moreover, the connection state of the battery 20 and the cable 32 can be stabilized by the protrusion 52 by connecting the battery 20 and the cable 32 via the protrusion 52 (battery fitting hole 52a). In connecting the cable 32 and the cable 32, the protrusion 52 can be used effectively.

  As shown in FIGS. 1, 2, 5, and the like, the connector 22 of the battery 20 is connected to the cable 32 in the hollow portion through the battery fitting hole 52a. Thereby, it can prevent that the connection location of the battery 20 and the cable 32 is exposed outside the vehicle, and can protect this connection location reliably.

  In addition, a floor cover 46 that covers the hollow portion of the protruding portion 52 from the inside of the passenger compartment 3 is provided, and this can be attached to and detached from the floor panel 5, so that the battery 20 can be easily replaced. The maintenance property in the hollow portion can be improved. For example, in the case of the present embodiment, the connector 22 and the cable 32 are connected in the hollow portion. Therefore, the connector 22 and the cable 32 can be connected by removing the floor cover 46 from the floor panel 5. It can be done easily.

  FIG. 10 shows another embodiment of the battery support structure according to the present invention. In the embodiment shown in FIG. 10, a transverse member 70 that penetrates the left and right side surfaces of the protrusion 52 in the vehicle width direction is provided. In FIG. 10, the same components as those in the previous embodiment shown in FIGS.

  In the present embodiment, the transverse member 70 is supported by both side portions of the projecting portion 52, and female connectors 71 as battery connection portions are provided at both ends in the vehicle width direction. A connecting terminal 72 is further attached to the transverse member 70, and this is provided in the hollow portion of the protruding portion 52. The connection terminal 72 is connected to the cable 32 disposed in the hollow portion of the protruding portion 52.

  On the other hand, as shown in FIG. 10, the battery 20 has a male connector 122 attached to the side surface thereof. In the present embodiment, the battery 20 and the cable 32 can be connected by fitting the male connector 122 of the battery 20 to the female connector 71 of the transverse member 70. The transverse member 70 including the female connector 71 functions as a support portion that supports the side surface portion of the battery 20, and the battery 20 can be supported by the vehicle body by the fitting. Yes.

  In this embodiment, the rigidity of the floor panel 5 can be improved by providing the transverse member 70 that penetrates the left and right side surfaces of the protrusion 52 in the vehicle width direction. Further, since the battery 20 is supported by both end portions of the transverse member 70, the support rigidity of the battery 20 can be ensured.

  Further, both ends of the transverse member 70 are arranged on the side surface of the protruding portion 52, and the battery connection portion (female connector 71) is provided on both ends, so that the battery 20 and the cable are connected via the protruding portion 52. 32 can be connected, and the connection state between the battery 20 and the cable 32 can be stabilized by the protrusion 52 and the transverse member 70. For this reason, when connecting the battery 20 and the cable 32, the protrusion part 52 and the transverse member 70 can be used effectively. Further, in this case, the battery 20 can be easily attached and detached from the side of the vehicle.

  The relationship between the male type and the female type of the connectors 71 and 122 is not necessarily limited to that shown in FIG. 10, and may be reversed.

  By the way, in embodiment mentioned above, although the floor surface 51 and the protrusion part 52 are integrally molded, this invention is not necessarily limited to this, The protrusion part extended in a vehicle front-back direction is comprised by another member. Further, it may be connected to the lower surface of the floor surface.

  Further, in the above-described embodiment, the battery 20 is supported by the front and rear guide support members 38 fixed to the cross members such as the torque box member 11, the cross member 14, and the cross member portion 18a. It is not necessarily limited to this. For example, the battery 20 may be fixed to the cross member by a fastening member or the like. In this case, the portion of the cross member to which the battery 20 is fixed becomes the front and rear support portion.

In correspondence between the configuration of the present invention and the above-described embodiment,
The support portion of the present invention corresponds to the battery fitting hole 52a, the lower support member 39, and the transverse member 70,
Similarly,
The cross member corresponds to the torque box member 11, the cross member 14, and the cross member portion 18a.
The front and rear support portions correspond to the front and rear guide support members 38,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

DESCRIPTION OF SYMBOLS 1 ... Electric vehicle 5 ... Floor panel 6 ... Front side frame 8 ... Sub frame 11 ... Torque box member 14 ... Cross member 18a ... Cross member part 20 ... Battery 38 ... Front and rear guide support member 41 ... Side sill 44 ... Side panel 45 ... Impact Absorbing member 52 ... Projection 52a ... Battery fitting hole 70 ... Transverse member

Claims (5)

In the vehicle width direction center part of the floor of the passenger compartment, a protrusion that protrudes downward from the floor surface and extends in the vehicle longitudinal direction is provided
While providing a support part for supporting the battery in the projecting part,
A front side frame extending in the vehicle front-rear direction is provided in front of the vehicle in the vehicle compartment,
A battery support structure for an electric vehicle in which a rear end portion of the front side frame is connected to a front end portion of the protruding portion. Under the front side frame, a subframe that supports the suspension of the front wheels is provided,
While connecting the front end of the sub-frame to the lower part of the front side frame,
The battery support structure for an electric vehicle according to claim 1, wherein a rear end portion of the subframe is connected to a front end portion of the protruding portion. A cross member extending in the vehicle width direction is provided on the lower surface of the floor,
The battery support structure for an electric vehicle according to claim 1 or 2, wherein the cross member is provided with a front / rear support portion for supporting a vehicle front / rear direction end portion of the battery. A side panel is provided on the outside in the vehicle width direction of the battery in a state supported by the support part,
The battery support structure for an electric vehicle according to any one of claims 1 to 3, wherein an impact absorbing member is provided on an inner side in the vehicle width direction of the side panel. The battery support structure for an electric vehicle according to claim 4, wherein a side sill having a closed cross section extending in the vehicle front-rear direction is provided above an end of the floor in the vehicle width direction.

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