JP6201381B2 - Battery support structure - Google Patents

Description

  The present invention relates to a support structure for a battery mounted on a vehicle.

  In an electric vehicle such as an electric vehicle or a hybrid vehicle, a battery that functions as a power source of an electric motor that drives the vehicle is mounted. When mounting such a battery in a vehicle, the front side of the battery is supported by the vehicle body using a fastening member whose axial direction is in the vehicle width direction, and the fastening member whose axial direction is in the vertical direction is arranged on the rear side of the battery. A support structure that is used and supported by a vehicle body is known (see Patent Document 1 below).

JP 2006-73466 A

  By the way, in the above-described conventional battery support structure, the front side and the rear side of the battery are fastened and fixed by fastening members via brackets. At that time, on the front side of the battery, the surface orthogonal to the vehicle width direction is a fastening surface by the fastening member, and on the rear side of the battery, the surface orthogonal to the vertical direction is the fastening surface by the fastening member.

  However, in the battery support structure using the fastening surfaces in only two directions as described above, the support rigidity for the battery is not sufficient, and improvement is desired.

  In view of the above, the present invention has an object to further increase support rigidity as a battery support structure in a vehicle.

In the present invention, the battery crosses the vehicle body up-down direction and faces two surfaces of the upper surface and the lower surface, the vehicle body front-rear direction intersects and faces the front and rear surfaces, and the vehicle width direction. Each of the first, second, and third support portions that serve as battery support portions for the vehicle body. In a state where the battery is in contact with the battery, it has a support surface that is fixed at at least two points and supports the battery, and the support surfaces of each support portion are different from each other on three surfaces of the six surfaces of the battery that intersect each other. It is a surface along one surface.

  According to the present invention, the battery is supported with respect to the vehicle body by the three support surfaces intersecting each other. In this case, since there are two support surfaces that cross in different directions with respect to one support surface, the support rigidity of the battery support structure for the vehicle body can be further increased.

It is a top view of the rear seat rear side of the vicinity where the battery unit which shows the 1st Embodiment of this invention is mounted. It is the perspective view seen from the vehicle body front of the battery unit in the state mounted in the vehicle. It is the perspective view seen from the vehicle body back of the battery unit of the state mounted in the vehicle. (A) is the top view which modeled the support structure of the battery of FIG. 1, (b) is the B arrow view of (a), (c) is the C arrow view of (b). 4A is a side view corresponding to FIG. 4C, showing the mounting position of the front bracket, and FIG. 4B is the mounting position of the left bracket, according to the second embodiment of the present invention. (C) is a rear view showing the mounting position of the right bracket. It is a side view corresponding to Drawing 4 (c) showing the state where the battery unit inclined. (A) is sectional drawing of the right bracket periphery which shows the 3rd Embodiment of this invention, (b) is a perspective view which shows the state by which the opening part for cooling is formed in the right bracket of (a). . FIG. 5 is a plan view corresponding to FIG. 4A, showing an example in which the left bracket and the right bracket are directly attached to the battery unit.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view of a rear side of a rear seat (not shown) in an electric vehicle in the vicinity of which a battery unit 1 is mounted, showing a first embodiment of the present invention. In the following drawings including FIG. 1, the direction indicated by the arrow FR is the front side of the vehicle body, the direction indicated by the arrow UPR is the upper side of the vehicle body, and the direction indicated by the arrow RH is the right side of the vehicle body. The battery unit 1 serves as a power source for an electric motor that drives an electric vehicle. The battery unit 1 includes a battery module 3 serving as a battery main body on the right side in the vehicle width direction in FIG. 1, and auxiliary devices 5 on the left side in the vehicle width direction. The battery module 3 and the auxiliary machines 5 are housed in a battery case 7. The battery module 3 is an assembled battery in which a plurality of single cells are connected in series or in parallel. The auxiliary machinery 5 includes a DC-DC converter, a junction box, a battery controller, and the like. The battery case 7 includes a substantially rectangular battery casing 71 that houses the battery module 3 and the accessories 5, a front bracket 21, and protective members 27 and 29. The front bracket 21 and the protection members 27 and 29 will be described in detail below.

  The battery unit 1 is disposed on the rear floor panel 19 between the left and right strut towers 15 and 17 while being supported between the left and right side members 11 and 13 behind the second cross member 9 at the rear of the vehicle body. . The second cross member 9 extends in the vehicle width direction (vehicle body left-right direction) corresponding to the left-right direction in FIG. The left and right side members 11 and 13 are extended in the vehicle front-rear direction corresponding to the vertical direction in FIG. 1 at both left and right positions of the vehicle body, and from the vicinity of the position corresponding to the battery unit 1 the vehicle body rear side is outward in the vehicle width direction. It is bent toward.

  The above-described second cross member 9 and left and right side members 11 and 13 protrude upward with respect to the rear floor panel 19 and the floor panel 20 in front thereof. The peripheral portion of the rear floor panel 19 is welded and joined to the side surface of the second cross member 9 on the vehicle body rear side and the inner side surfaces of the left and right side members 11 and 13 facing each other. The peripheral edge of the floor panel 20 is also welded to the side surface of the second cross member 9 on the vehicle body front side and the inner side surfaces of the left and right side members 11 and 13.

  The battery unit 1 described above has a rectangular shape that is long in the vehicle width direction in a plan view as shown in FIG. 1, and is a rectangular shape that is long in the vertical direction when viewed from the left and right sides in FIG. 1. It has a shape. In addition, as shown in a perspective view (FIG. 2) seen from the front of the vehicle and a perspective view (FIG. 3) seen from the rear of the vehicle, the battery unit 1 has an upper portion that is higher than the lower portion in accordance with the inclination of a rear seat (not shown). It is inclined (backward inclined) to be rearward. In this inclined state, the battery unit 1 is arranged such that the lower part thereof is located in a region surrounded by the second cross member 9 and the left and right side members 11 and 13. At this time, at least a part of the bottom of the battery unit 1 is in contact with the surface of the rear floor panel 19 via a cushioning material (not shown).

  And in the above-mentioned inclination state, the battery unit 1 has fixed the vehicle body front side to the second cross member 9 as a 1st support part. Further, the battery unit 1 is fixed on the left side in the vehicle width direction to a left bracket 23 as a second support portion fixed on the left side member 11 and fixed on the right side member 13 on the right side in the vehicle width direction. It is fixed to the right bracket 25 as the third support portion.

  Here, a protection member 27 extending in the vertical direction of the vehicle body is welded and fixed to a rear surface (rear surface) 7a on the vehicle rear side on the left side in the vehicle width direction of the battery housing 71 and attached to the battery housing 71 integrally. A left bracket 23 is attached to the rear side of the vehicle body of the protective member 27. On the other hand, a protective member 29 extending in the vertical direction of the vehicle body is welded and fixed to the rear surface (rear surface) 7a on the right side in the vehicle width direction of the battery casing 71 and integrated with the battery casing 71. A right bracket 25 is attached to the right side in the vehicle width direction. Each of the protective members 27 and 29 has a rectangular structure in which the length in the vertical direction of the vehicle body is substantially equal to the length of the battery unit 1 in the vertical direction of the vehicle body, and the front of the battery housing 71 side is open. Here, the protection members 27 and 29 are members that are integrally attached to the battery casing 71 to form a part of the battery case 7. Accordingly, the protective members 27 and 29 are not limited to those formed by welding or the like after being formed separately from the battery casing 71. For example, the rear surface (rear surface) 7a of the battery casing 71 itself is formed in a convex shape rearward of the vehicle. By doing so, it may be formed as a part of the battery casing 71.

As shown in FIG. 2, the front bracket 21 is integrally attached to the battery housing 71 by being welded or bolted to the front surface 7 b of the battery housing 71 and constitutes a part of the battery case 7. It is a member. The front bracket 21 includes a battery-side fixing surface 21a and a cross-member-side fixing surface 21b that bends toward the front of the vehicle from the lower end of the battery-side fixing surface 21a. Such a front bracket 21 has a length in the vehicle width direction that is substantially the same as the length in the vehicle width direction of the battery housing 71, and has a cross-section between the battery side fixing surface 21 a and the cross member side fixing surface 21 b described above. It is almost L-shaped. Since the front bracket 21 is a member that is integrally attached to the battery casing 71 and forms a part of the battery case 7, it is formed separately from the battery casing 71 and then integrated by welding or the like. For example, the battery casing 71 may be formed as a part of the battery casing 71 by, for example, a flange extending from the front surface 7b of the battery casing 71 itself. Thus the front bracket 2 1 course if formed as part of the battery housing 71, the front bracket 2 1 no battery fixation surfaces 21a described above.

  The cross member side fixing surface 21b is fixed to the upper fixing surface 9a by four bolts 31 serving as four fasteners along the vehicle width direction in a state of being placed on the upper fixing surface 9a protruding above the second cross member 9. doing. The upper fixing surface 9a of the second cross member 9 constitutes a support surface that intersects the vehicle body vertical direction. The cross member side fixing surface 21b also intersects the vehicle body vertical direction, and the upper fixing surface 9a and the cross member side fixing surface 21b are parallel to each other.

  As shown in FIG. 3, the left bracket 23 includes a battery-side fixing surface 23a that is fixed to the rear side of the vehicle body of the protective member 27, and a side member-side fixing surface that is bent toward the rear side of the vehicle body from the lower end of the battery-side fixing surface 23a. 23b. The battery side fixing surface 23a and the side member side fixing surface 23b are connected to each other by a connecting portion 23c.

  The battery-side fixing surface 23a is fixed to the protective member 27 by two bolts 33 serving as fasteners, and constitutes a support surface that intersects the vehicle body longitudinal direction. On the other hand, the side member side fixing surface 23b protrudes outward in the vehicle width direction with respect to the battery side fixing surface 23a, and is fixed on the upper side by the two bolts 35 in a state of being placed on the upper fixing surface 11a of the side member 11. It is fastened and fixed to the surface 11a.

  When the battery unit 1 is mounted on the vehicle, the battery unit 1 is moved from the vehicle rear to the mounting position and assembled. For this reason, in the present embodiment, considering the workability when the battery unit 1 is mounted on the vehicle (to ensure the movement trajectory of the battery unit 1), the left bracket 23 and the side member 11 are separated, The left bracket 23 is removable from the side member 11. However, when it is not necessary to consider workability when mounting the battery unit 1 on the vehicle, the left bracket 23 may be fixed to the side member 11 by welding or the like, or the side member 11 or the left strut tower. A part of 15 may be extended.

  As shown in FIG. 3, the right bracket 25 includes a battery side fixing surface 25 a that is fixed to the right side surface of the protection member 29 in the vehicle width direction, and a side member side fixing surface that is fixed to the upper fixing surface 13 a of the side member 13. 25b. The battery side fixing surface 25a and the side member side fixing surface 25b are connected to each other by a connecting portion 25c.

  The battery-side fixing surface 25a is fixed to the right side surface 29a of the protective member 29 by two bolts 37 serving as fasteners, and constitutes a support surface that intersects the vehicle width direction (vehicle body left-right direction). . On the other hand, the side member side fixing surface 25b protrudes so as to be bent outward in the vehicle width direction with respect to the battery side fixing surface 25a, and is mounted on the upper fixing surface 13a of the side member 13 with two bolts. 39 is fastened and fixed to the upper fixing surface 13a.

  As with the left bracket 23, the right bracket 25 is also detachable from the side member 13 in consideration of workability when the battery unit 1 is mounted on the vehicle. However, the battery unit 1 is mounted on the vehicle. When it is not necessary to consider the workability at the time, the side member 13 may be fixed by welding or the like, or a part of the side member 13 or the left strut tower 17 may be extended. .

  Here, the battery unit 1 (the battery unit 1 including the battery module 3, the auxiliary machinery 5, and the battery case 7) constitutes a battery. This battery has three supporting surfaces (upper fixing surface 9a, battery-side fixing surface 23a, and battery-side fixing) in the first, second, and third supporting portions (second cross member 9, left bracket 23, and right bracket 25). It is supported by the surface 25a). When the battery unit 1 is mounted on the vehicle, the battery module 3, the auxiliary machinery 5, and the battery case 7 (the battery casing 71, the front bracket 21, and the protective members 27 and 29) are assembled to each other outside the vehicle. The battery unit 1 is assembled in an integrated manner, and the battery unit 1 is mounted on a vehicle and fixed.

  4 (a) is a plan view schematically showing the battery support structure of FIG. 1, FIG. 4 (b) is a view taken in the direction of arrow B in FIG. 4 (a), and FIG. 4 (c) is C in FIG. 4 (b). It is an arrow view. In each of these schematic views, the battery unit 1 is not tilted as shown in FIGS. 1 to 3, but is handled as a state in which the battery unit 1 stands vertically in the vertical direction. Moreover, the fastening position of a bolt etc. is also different from FIGS. In the present embodiment, for simplification of description, when the battery unit 1 is mounted on a vehicle, the front bracket 21 at the front portion of the battery unit 1 is fixed to the second cross member 9. Further, the left rear portion of the battery unit 1 is fixed to the left bracket 23 fixed to the side member 11, and the right rear portion of the battery unit 1 is fixed to the right bracket 25 fixed to the side member 13.

  At that time, the front bracket 21 is fastened by the bolt 31 in a state where the cross member side fixing surface 21b is in surface contact with the upper fixing surface 9a of the second cross member 9, which is a support surface that intersects and orthogonally intersects the vehicle body vertical direction. It is fixed. Further, the left bracket 23 is fastened and fixed by bolts 33 in a state where the battery side fixing surface 23a, which is a support surface intersecting with the vehicle body longitudinal direction, is in surface contact with the rear surface 27a of the protective member 27. Further, the right bracket 25 is fastened and fixed by a bolt 37 with the battery side fixing surface 25a, which is a support surface intersecting and orthogonal to the left and right direction of the vehicle body, in surface contact with the right side surface 29a of the protection member 29. Yes.

  As described above, in the present embodiment, when the battery unit 1 is mounted on a vehicle, the three support portions (second cross members 9, 2) having support surfaces that intersect the vehicle body vertical direction, the vehicle body front-rear direction, and the vehicle body left-right direction, respectively. The battery unit 1 is supported on the vehicle body by left and right brackets 23 and 25). That is, the battery unit 1 is supported on the vehicle body by three support surfaces that intersect each other. Thereby, between the battery unit 1 and the vehicle body, there are two support surfaces that intersect with each other in different directions with respect to the one support surface by the three support portions. As a structure, the support rigidity can be further increased. That is, the battery unit 1 is supported by the upper fixing surface 9a of the second cross member 9, which is three supporting surfaces intersecting in different directions, the battery side fixing surface 23a of the left bracket 23, and the battery side fixing surface 25a of the right bracket 25. As a result, high support rigidity is achieved.

  For example, a case is assumed in which a load that causes the battery unit 1 to swing in the front-rear direction of the vehicle body is applied to the battery-side fixing surface 23a that is a support surface in the support portion by the left bracket 23. In this case, the other two support surfaces (the upper fixing surface 9a of the second cross member 9 and the battery side fixing surface 25a of the right bracket 25) receive the load, and the battery unit 1 is attached to the battery side fixing surface 23a. Reduces oscillating displacement. Similarly, in the support portion by the second cross member 9, when a load that causes the battery unit 1 to swing in the vertical direction of the vehicle body is input to the upper fixed surface 9a, the other two support surfaces (the left bracket 23) are input. The battery side fixing surface 23a and the right side bracket 25 battery side fixing surface 25a) suppress the swing displacement of the battery unit 1. Similarly, when a load that swings the battery unit 1 in the left-right direction of the vehicle body is input to the battery-side fixed surface 25a in the support portion by the right bracket 25, the other two support surfaces (second cross members) 9 and the battery side fixing surface 23a of the left bracket 23 suppress the swinging displacement of the battery unit 1.

  Further details will be described. Each support surface (the upper fixing surface 9a of the second cross member 9, the battery side fixing surface 25a of the right bracket 25, and the battery side fixing surface 23a of the left bracket 23) has high rigidity with respect to a load of a direction component parallel to the surface. . On the other hand, the rigidity against the load of the direction component perpendicular to the surface of each support surface (straight) is lower than the rigidity against the load of the direction component parallel to the surface. However, by providing three support surfaces that intersect each other as in the present embodiment, two support surfaces that intersect in different directions with respect to one support surface are provided, so that the load generated in the battery unit 1 can be reduced. High support rigidity.

  For example, it is assumed that a load parallel to the longitudinal direction of the vehicle body is generated in the battery unit 1 due to acceleration or deceleration of the vehicle. In this case, the generated load is perpendicular to the battery side fixing surface 23a of the left bracket 23, but parallel to the other two supporting surfaces (upper fixing surface 9a and battery side fixing surface 25a). It is. Accordingly, it is possible to reliably support the load parallel to the longitudinal direction of the vehicle body with the other two support surfaces.

  As described above, in the present embodiment, by providing the three support surfaces that intersect with each other, the support rigidity of the battery in the vehicle can be further enhanced against the load of any direction component. Note that the three support surfaces intersect each other means that the support surfaces (upper fixing surface 9a, battery side fixing surface 23a, battery side fixing surface) of each of the three support portions (second cross member 9, left side, right side brackets 23, 25). It goes without saying that the surfaces extending from 25a) intersect each other.

  Particularly, as shown in FIG. 4C, the battery unit 1 of the present embodiment has a vertical height that is longer than the longitudinal dimension of the vehicle body, and the battery unit 1 is tilted slightly backward while being vertically inclined. It is mounted on the vehicle in the state of being placed. In such a case, the battery unit 1 is likely to be displaced with respect to the vibration of the vehicle and the collision load received by the vehicle as compared with the case where the vehicle is placed horizontally (a state in which the vertical height is lowered). However, the displacement of the battery unit 1 can be more effectively suppressed by increasing the support rigidity as in the present embodiment.

  In the present embodiment, the left bracket 23 is fixed to the battery housing 71 via the protective member 27. The protection member 27 is formed by hollow plate material. As shown in FIG. 4A, the tip of the bolt 33 protrudes into the protection member 27, but does not reach the battery casing 71.

  For this reason, even if the vehicle receives an impact load F1 due to a collision or the like from the left side, and especially the periphery of the fastening portion of the bolt 33 receives the load and deforms like a two-dot chain line, the tip of the bolt 33 is in the protective member 27. Stays in place. Thereby, it is possible to suppress damage to stored items such as the auxiliary machinery 5 in the battery casing 71 due to the tip of the bolt 33, and the reliability of the support structure of the battery unit 1 is improved.

  On the other hand, the right bracket 25 is fixed to the battery casing 71 via the protective member 29. The protection member 29 is also formed of a hollow plate material. As shown in FIG. 4A, the tip of the bolt 37 protrudes into the protection member 29. The battery casing 71 is not reached.

For this reason, even if the vehicle receives an impact load F2 due to a collision or the like from the right side, and especially the periphery of the fastening portion of the bolt 37 receives the load and deforms like a two-dot chain line, the tip of the bolt 37 is in the protective member 29. Stays in place. Thereby, it is possible to suppress damage to the stored items such as the battery module 3 in the battery casing 71 due to the tip of the bolt 37, and the support structure of the battery unit 1 is improved in reliability.

  Further, when the vehicle receives an impact load due to a collision or the like from the rear, the protective members 27 and 29 are crushed and deformed to serve as an impact absorbing member, so that the battery module 3 and the auxiliary machinery 5 in the battery housing 71 and the like. Reducing the impact load on the container. As a result, it is not necessary to reinforce the battery casing 71 of the battery unit 1 in a large scale, and weight reduction and cost reduction can be achieved.

  In the present embodiment, the first support portion is the cross member 9 extending in the left-right direction of the vehicle body. The front bracket 21 is attached to the second cross member 9, and the left and right brackets 23, 25 are connected to the front and rear of the vehicle body. It is attached to the left and right side members 11, 13 extending in the direction. Thereby, the battery unit 1 can be firmly supported by the second cross member 9 and the side members 11 and 13 which are the skeleton members of the vehicle body via the front bracket 21 and the left and right brackets 23 and 25.

  FIG. 5 shows a second embodiment of the present invention. FIG. 5A shows the mounting position of the front bracket 21, more specifically, the vehicle body vertical position of the upper fixed surface 9a of the second cross member 9 serving as a support surface is the center of gravity position G of the battery unit 1 in the vehicle vertical direction. In the example shown in FIG. Thereby, especially when the vehicle receives an impact load in the longitudinal direction of the vehicle body, it is possible to suppress a moment that is generated in the battery unit 1 as an axis in the vehicle width direction, and to suppress the displacement of the battery unit 1. .

  FIG. 5B shows the mounting position of the left bracket 23, more specifically, the center position of the battery side fixing surface 23a serving as the support surface in the vehicle body vertical direction of the battery unit 1 in the vehicle body vertical direction G. An example of matching in direction is shown. 5C shows the mounting position of the right bracket 25, more specifically, the center position in the vehicle body vertical direction of the battery side fixing surface 25a serving as the support surface is the center of gravity position G in the vehicle body vertical direction of the battery unit 1. An example of matching in the vertical direction of the vehicle body is shown.

  In the example of FIGS. 5B and 5C as well, as in the example of FIG. 5A, the vehicle width direction generated in the battery unit 1 particularly when the vehicle receives an impact load in the front-rear direction. As a result, the moment of the axial center of the battery unit 1 can be reduced, and the displacement of the battery unit 1 can be suppressed.

  In addition, it is also possible to set it as the structure which combines all the examples of Fig.5 (a), FIG.5 (b), and FIG.5 (c), and thereby the moment which acts on the said battery unit 1 is made still smaller. This is extremely effective in suppressing displacement of the battery unit 1.

  Further, in the present embodiment, as shown in FIG. 6, the battery unit 1 is inclined (rearly inclined) so as to have an inclination angle equivalent to the rearward inclination angle of the rear seat 41 located in front of the vehicle body. Arranged. By tilting the battery unit 1 so that the upper part is the rear of the vehicle body and the lower part is the front of the vehicle body, the depth of the luggage compartment 43 at the rear of the vehicle body of the battery unit 1 becomes remarkable, and the merchantability can be improved. As shown in the schematic diagrams of FIGS. 4 and 5, the battery unit 1 is inclined such that the support rigidity can be increased and the moment can be kept small even when the battery unit 1 is vertically inclined without being inclined. The same effect as that obtained can be obtained.

FIG. 7 shows a third embodiment of the present invention. In the present embodiment, as shown in FIG. 7A, a reinforcing member 45 having an L-shaped cross section is arranged in a protective member 29 to which the right bracket 25 at the right rear portion in the vehicle width direction of the battery unit 1 is attached. The reinforcing member 45, the front face 45a which intersects the longitudinal direction of the vehicle body, welded and fixed to a surface 7 a after the battery housing 71, extends to bend toward the rear of the vehicle body from the vehicle width direction outer side end portion of the front surface 45a A nut 47 is fixed to the inside of the side surface 45b by welding.

  Then, the right bracket 25 is fixed to the protective member 29 by fastening the bolt 37 to the welded nut 47 from the outside of the right bracket 25. In this case, the right bracket 25, the protection member 29, and the reinforcing member 45 are fastened together by the bolt 37 and the nut 47.

In this embodiment, as shown in FIG. 7B, for example, when an opening 29b serving as an air inlet for battery cooling is formed on the right side surface 29a of the protective member 29 on the outer side in the vehicle width direction, the reinforcing member 45 is formed. It can suppress that the protection member 29 weakens by providing. Moreover, the structure which attaches the nut 47 to the L-shaped reinforcement member 45 can suppress the deterioration of workability | operativity that it is difficult to weld and fix a nut to the inside of the protection member 29 currently formed in the bag shape.

A bolt 37 is welded and fixed to the reinforcing member 45 in place of the nut 47, the tip of the bolt 37 protrudes outward in the vehicle width direction, and the nut from the outside of the right bracket 25 with respect to the protruding screw portion. Can also be concluded.

As shown in FIG. 8, the left bracket 23 and the right bracket 25 can be directly attached to the battery housing 71 without providing the protective members 27 and 29 in each of the above-described embodiments. In this case, it is necessary to prevent the tips of the bolts 33 and 37 from coming into contact with the equipment in the battery housing 71.

1 Battery unit (battery)
11, 13 Side member
9 second cross member (cross member, first support)
Upper fixed surface of the 9a second cross member (support surface intersecting the vertical direction of the vehicle body)
23 Left bracket (second support)
23a Battery side fixing surface of the left bracket (support surface intersecting the longitudinal direction of the vehicle body)
25 Right bracket (third support)
25a Battery-side fixing surface of right bracket (support surface intersecting the left-right direction of the vehicle body)
27, 29 Protection member 33, 37 Bolt (fastener)
G Center of gravity of the battery unit in the vertical direction of the vehicle body

Claims (6)

A support structure for a battery mounted on a vehicle,
The battery crosses the vehicle body up and down direction and faces two surfaces, an upper surface and a lower surface, and the vehicle front and rear direction intersects and faces the front and rear surfaces, and the vehicle width direction. It has six surfaces composed of two surfaces, a left side surface and a right side surface that intersect and face each other,
As a battery support portion for the vehicle body, a first support portion, a second support portion, and a third support portion respectively provided with support surfaces that support the battery by being fixed at at least two points in contact with the battery. A support part,
The battery support structure according to claim 1, wherein the support surfaces of the first, second, and third support portions are surfaces along three different surfaces of the six surfaces of the battery that intersect each other.   The contact position of at least one of the support surfaces of the first, second, and third support portions with the battery coincides with the position of the center of gravity of the battery in the vertical direction of the vehicle body. The battery support structure according to claim 1, wherein: The battery includes an assembled battery formed by connecting a plurality of single cells, and a battery case that houses the assembled battery,
The battery case has six sides corresponding to the six sides of the battery ;
2. The support surface of each of the first, second, and third support portions is a surface that is parallel to one of three mutually intersecting surfaces of the six surfaces of the battery case. Or a support structure for a battery according to 2; The battery case includes a battery case that houses the assembled battery, and a hollow cylindrical protective member connected to the battery case,
The at least one support surface of each of the first, second, and third support portions is attached to the protection member by a fastener to support the battery. The battery support structure described.   The battery support structure according to claim 4, wherein the protection member is provided on a vehicle body rear side of the battery casing.   The first support portion is a cross member extending in the left-right direction of the vehicle body, and the second and third support portions are the left and right sides extending in the front-rear direction of the vehicle body at both left and right positions of the vehicle body. 6. The battery support structure according to claim 1, wherein the battery support structure is a bracket attached to each member.

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