JP2014022277A - Support structure of battery pack, and battery pack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support structure of a battery pack which can reduce influence of torsion occurred in a frame of a vehicle body on the battery pack supported by such a frame, and to provide the battery pack having the support structure.SOLUTION: A support structure of a battery pack 10 supports the battery pack 10 in a cantilever state with a frame Fr of a mobile body such as a vehicle body. In the battery pack 10, fastening faces of two separated carrier brackets are fixed to the frame Fr of the vehicle body so as to support the battery pack 10 in a cantilever state. The fastening face of the carrier bracket on a left side in a direction perpendicular to a separating direction is fixed to the frame Fr of the vehicle body in a predetermined fastening width, and the fastening face of the carrier bracket 30 on a right side is fixed to the frame Fr of the vehicle body in a fastening width narrower than the predetermined fasting width of the carrier bracket on the left side.

Description

  The present invention relates to a battery pack support structure for supporting a battery pack in which a battery stack is accommodated on a moving body such as a vehicle, and a battery pack including the support structure.

  As is well known, an electric motor or a hybrid vehicle uses an electric motor as a power source or an auxiliary power source. As a power source of this electric motor, a battery stack in which a plurality of battery modules are connected in series is often used in a state of being housed in a battery pack. That is, the battery pack protects the battery stack by housing the battery stack in the exterior cover. And when such a battery pack is arrange | positioned in vehicle interiors, such as a motor vehicle, it arrange | positions on the floor in a vehicle interior in the state which covered the battery stack with the exterior cover. On the other hand, in a truck or the like where the passenger compartment space is limited, the battery pack may be cantilevered on the vehicle body frame outside the vehicle. For example, Patent Document 1 describes an example of a battery pack that is cantilevered by a body frame outside the vehicle.

  As shown in FIG. 12, the battery pack described in Patent Document 1 has a battery pack 101 mounted on a battery storage shelf 102 connected to a vehicle body frame 104 on the vehicle outer side via a bracket 103. The mounted battery pack 101 is covered with an upper cover 106 attached to the battery storage shelf 102. A lower shelf 107 on which a power supply device 114 and the like are mounted is provided below the battery housing shelf 102. In such a mounting structure, the battery pack 101 is mounted on the battery storage shelf 102 and is cantilevered on the vehicle body frame 104 on the outer side of the vehicle together with the upper cover 106 and the like.

JP 2008-80930 A

  By the way, when a vehicle approaches an uneven surface such as a road surface, the force received from the uneven surface such as the road surface is absorbed to some extent by moving the wheel up and down, but a part of the force received by the wheel is applied to the wheel. And is applied to the vehicle body frame as torsional stress. For this reason, the battery pack supported by the bracket fixed along the parallel fastening lines A and B (see FIG. 12) provided on the vehicle body frame, such as the battery pack described in Patent Document 1, is a twist of the vehicle body frame. To follow and twist between the two brackets.

  Such a problem is not only common to the body frame but also a variety of moving objects having a frame supported on the ground or the like by a plurality of support points that cause torsion.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a battery pack that can reduce the influence of twist generated in a frame of a vehicle or the like on the battery pack supported by the frame. The object is to provide a support structure and a battery pack having the support structure.

  In order to solve the above problems, the invention according to claim 1 is a battery pack support structure in which a battery pack is cantilevered on a frame of a moving body, and the battery pack is cantilevered on the frame. Therefore, two spaced apart attachment points are fixed to the same frame, and one of the two attachment points is fixed to the frame with a predetermined fixed width in a direction orthogonal to the separation direction. The gist is that the other of the two attachment points is fixed to the frame with a fixed width narrower than the predetermined fixed width.

  In order to solve the above-mentioned problem, an invention according to claim 8 is a battery pack that is cantilevered by a frame of a moving body, wherein the battery pack is spaced apart so as to be cantilevered by the frame. It is summarized that the two attachment points are fixed to the frame and are cantilevered by the frame by the battery pack support structure according to any one of claims 1 to 7 via the two attachment points. And

  According to such a configuration, even when the twist generated in the frame is applied as a torsional stress to the battery pack through the two attachment points, the amount of one attachment point follows the twist of the frame. The amount of the other attachment location following the twist of the frame can be reduced. In other words, the twist of the frame is absorbed between the two attachment points by the difference between the follow-up amount to the twist of one attachment point and the follow-up amount to the twist of the other attachment point, and the battery passes through the two attachment points. The torsional stress applied to the pack is reduced. Accordingly, there is provided a battery pack support structure in which the influence of a twist generated in a frame of a moving body such as a vehicle on the battery pack supported by the frame is reduced, and a battery pack having the support structure. be able to.

  According to a second aspect of the present invention, in the battery pack support structure according to the first aspect, the battery pack is provided with a first attachment portion and a second attachment portion that are spaced apart from each other. The gist is that one attachment location is provided in the first attachment portion and the other attachment location is provided in the second attachment portion.

  According to such a structure, an attachment location can be provided in a 1st attachment part or a 2nd attachment part. Since the mounting location for cantilever support is required to be strong, this increases the degree of freedom in design of the mounting location and allows suitable design to be performed.

  A third aspect of the present invention is the battery pack support structure according to the first or second aspect, wherein the two attachment locations are provided such that their fixed surfaces protrude toward the frame side. And

  According to such a structure, since the fixed surface of two attachment locations protrudes in the frame side, there is less possibility that portions other than the two attachment locations in the battery pack interfere with the frame. That is, the possibility that the twist of the frame is applied to the battery pack via other than the attachment location is suppressed. Thereby, the twist of a flame | frame will come to be reduced suitably by an attachment location.

  According to a fourth aspect of the present invention, in the battery pack according to any one of the first to third aspects, the two attachment locations are arranged on the frame via a projecting surface whose fixed surface is provided on the frame. It is attached to the gist.

  According to such a configuration, since the fixing surface of the attachment location is attached to the projecting surface provided on the frame, the possibility that portions other than the attachment location of the battery pack interfere with the frame is reduced. As a result, the torsion of the frame is absorbed by the projecting surface provided on the frame and the torsion of the frame is not transmitted to the battery pack from a portion other than the projecting surface of the frame. The impact will be reduced.

  According to a fifth aspect of the present invention, in the battery pack according to any one of the first to fourth aspects, the two attachment locations are connected to the frame via a cushioning material whose fixing surface can absorb stress. The gist is to be attached.

According to such a configuration, the torsional stress applied to the battery pack is further reduced.
According to a sixth aspect of the present invention, in the battery pack according to any one of the first to fifth aspects, the predetermined fixing width of the one attachment location is fixed at two locations in the same width direction. And the fixed width of the other attachment location is the distance between two fixed portions provided in the same width direction, or the width of one fixed portion. .

  According to such a structure, the fixed width of one attachment location and the fixed width of the other attachment location can be set now by the position of the fixing part fastened with a volt | bolt etc. As a result, a configuration for reducing the transmission of the twist of the frame to the battery pack can be easily realized.

  The invention according to claim 7 is the battery pack support structure according to any one of claims 1 to 6, wherein the fixed width of the other mounting location is the predetermined fixed width of the one mounting location. It is set to the position and width which have the same width | variety and are settled in the strip | belt-shaped area | region parallel to the said separation direction from said one attachment location.

  According to such a configuration, the extension direction of the torsion shaft generated in the frame and the direction from the midpoint of one mounting location to the midpoint of the other mounting location are parallel or close to it. The transmitted twist is reduced. Furthermore, the battery pack can be stably fixed to the frame.

  According to the battery pack support structure and the battery pack according to the present invention, it is possible to reduce the influence of the twist generated in the frame of the vehicle or the like on the battery pack supported by the frame.

The perspective view which shows the attachment aspect of a battery pack from one side of a battery pack about 1st Embodiment which actualized the support structure of the battery pack of this invention. The perspective view which shows the attachment aspect of the battery pack of the embodiment from the other side of a battery pack. The perspective view which shows the perspective structure of one bracket provided in the battery pack of the embodiment. The perspective view which shows the perspective structure of the other bracket provided in the battery pack of the embodiment. The perspective view which shows typically the aspect by which the battery pack of the embodiment is fixed to a flame | frame. In the same embodiment, when the frame is not twisted, it is a diagram schematically showing the positional relationship of the mounting position of the battery pack, (a) is a top view, (b) is a front view, (c) is a right side view. . In the embodiment, when the frame is twisted, it is a diagram schematically showing the positional relationship of the mounting position of the battery pack, (a) is a top view, (b) is a front view, (c) is a right side view. . The perspective view which shows schematic structure of the one bracket about 2nd Embodiment which actualized the support structure of the battery pack of this invention. The perspective view which shows schematic structure of the other bracket of the battery pack of the embodiment. The perspective view which shows the schematic structure about the aspect with which the bracket is provided in the storage case about 3rd Embodiment which actualized the support structure of the battery pack of this invention. The perspective view which shows the perspective structure of an example of the structure by the side of the flame | frame to which a bracket is connected about other embodiment which actualized the support structure of the battery pack of this invention. The perspective view which shows the perspective structure about the support structure of the conventional battery pack.

(First embodiment)
Hereinafter, a first embodiment of a battery pack support structure according to the present invention will be described with reference to FIGS.

  The battery pack 10 of the present embodiment is used as a power unit that is a power source (power source) that supplies power to an electric motor serving as a power source or an auxiliary power source for a truck as an electric vehicle or a hybrid vehicle.

  As shown in FIG. 1, the battery pack 10 extends in the longitudinal direction on a vehicle body frame Fr that is a part of the chassis of the truck in a manner that extends laterally with respect to the outside of the passenger compartment on the side of the vehicle body of the truck. It is installed as a horizontally long box-shaped device. That is, the battery pack 10 is installed along the longitudinal direction of the vehicle body frame Fr extending in the front-rear direction with respect to the traveling direction of the vehicle body. The battery pack 10 includes a housing case 11 including a lower case 12 and an upper case 13 as its exterior. That is, the storage case 11 has a rectangular parallelepiped shape, a so-called horizontally long box shape, and has a side surface on the frame side on the side facing the vehicle body frame Fr as one side surface in the longitudinal direction. Further, the housing case 11 has an outward side surface on the side opposite to the side surface on the frame side, that is, the side not facing the vehicle body frame Fr. Further, the housing case 11 houses a battery stack 16 as a secondary battery group composed of a plurality of battery modules as secondary batteries inside the case. For example, the battery module is a nickel metal hydride battery.

  The lower case 12 is formed into a horizontally long box shape having an opening at the top and a bottom at the bottom by processing a metal material. On the entire periphery of the opening formed in the upper part of the lower case 12, an annular lower flange 14 </ b> A that extends to the outside of the case with respect to each side surface of the lower case 12 extends from the opening along the outer periphery.

  The upper case 13 is formed in a horizontally long box shape having an opening in the lower part by processing a metal material. The shape of the upper case 13 is substantially the same as the shape obtained by rotating the lower case 12 180 degrees about the longitudinal direction. On the entire circumference of the opening formed in the lower part of the upper case 13, an annular upper flange 14 </ b> B extending outward from the case with respect to each side surface of the upper case 13 extends from the opening along the outer periphery.

  Then, the lower case 12 and the upper case 13 face each other and are overlapped with each other via a gasket or the like (not shown) between them, and the lower and upper flanges 14A and 14B that are opposed to each other are not shown. Are connected to each other. Thereby, the storage case 11 is configured in a horizontally long box shape.

  As shown in FIGS. 1 and 2, the housing case 11 is attached to the vehicle body frame Fr such that the side surface on the frame side, which is the side surface in the longitudinal direction, faces the vehicle body frame Fr. The storage case 11 is a side surface between the side surface on the frame side and the outward side surface, and has a left side surface on the front side of the vehicle body frame Fr, that is, the left side of the storage case 11 among the side surfaces at both ends in the longitudinal direction. The rear side of the vehicle body frame Fr, that is, the right side of the housing case 11 has a right side surface. That is, the left side surface and the right side surface are side surfaces extending in a direction away from the vehicle body frame Fr. Further, a left carrier bracket 20 as a first mounting portion is coupled to the left side surface of the housing case 11, and a right carrier bracket 30 as a second mounting portion is coupled to the right side surface of the housing case 11. Yes. That is, the storage case 11 is sandwiched between the left carrier bracket 20 and the right carrier bracket 30 in the longitudinal direction. Therefore, when the left carrier bracket 20 and the right carrier bracket 30 are respectively coupled to the vehicle body frame Fr, the housing case 11 is supported on the vehicle body frame Fr in a manner supported between the left carrier bracket 20 and the right carrier bracket 30. It is attached. Further, the two carrier brackets 20 and 30 are provided so that their mounting locations protrude toward the vehicle body frame Fr, and a space is secured between the housing case 11 and the vehicle body frame Fr.

Next, the left carrier bracket 20 and the right carrier bracket 30 will be described with reference to FIGS.
The left carrier bracket 20 and the right carrier bracket 30 are made of a metal material, and are formed in a shape that can ensure rigidity that cantilever support the housing case 11 on the vehicle body frame Fr. Here, the cantilever support refers to a support structure in which one end of the battery pack is fixed to the frame and the other end is a free end. In this embodiment, one of the support members (left and right carrier brackets 20 and 30). A mode in which only the side surface is connected to and supported by the vehicle body frame Fr. As the metal material constituting the carrier bracket, a metal plate having a thickness of 2.0 mm is used. However, if the rigidity can be ensured, a metal material having a thickness other than 2.0 mm is used. Also good.

  As shown in FIG. 3, the left carrier bracket 20 is provided with a joining surface 21 formed in the same shape as the left side surface of the housing case 11 so as to be in surface contact with the left side surface of the housing case 11. It has been. That is, the joint surface 21 has a shape that tapers in a direction away from the vehicle body frame Fr. In addition, the end surface of the joint surface 21 on the vehicle body frame side extends in the direction of the vehicle body frame Fr from the side surface of the housing case 11 on the vehicle body frame side. Further, the left carrier bracket 20 is provided with an upper flange 22 extending in the left direction, which is a direction away from the left side surface of the housing case 11, from the upper end of the joint surface 21 so that the lower carrier 14 </ b> A can come into surface contact. It has been. The left carrier bracket 20 is provided with a lower flange 23 extending from the lower end of the joint surface 21 in the left direction of the housing case 11.

  The left carrier bracket 20 has a frame connecting portion 24 as an attachment portion extending in the left direction from the end of the joint surface 21 on the vehicle body frame Fr side in order to fasten the left carrier bracket 20 to the vehicle body frame Fr. Is provided. The frame connecting portion 24 can be brought into contact with the vehicle body frame Fr by being arranged in a flange shape with respect to the end portion of the joint surface 21 extending to the vehicle body frame Fr side. The frame connecting portion 24 is joined to the end portion of the joining surface 21 and is also joined to the end portions of the upper flange 22 and the lower flange 23 on the side of the vehicle body frame Fr. As a result, the left carrier bracket 20 has a rigidity that can support the battery pack 10 on the vehicle body frame Fr by the joining surface 21, the upper flange 22, the lower flange 23, and the frame connecting portion 24 that surround the joining surface 21.

  The frame connecting portion 24 is formed with through holes 24a and 24b as two fixing portions so as to have a predetermined fastening width L1. The two through holes 24a and 24b are disposed on a fastening line A that is substantially parallel to the side of the joint surface 21 to which the frame connecting portion 24 is joined. As a result, the fastening surface on the vehicle body frame side as a fixed surface of the frame connecting portion 24 is disposed to face the surface of the vehicle body frame Fr, and the frame connecting portion 24 is penetrated through the through holes 24a and 24b in the direction of the vehicle body frame Fr. By being fastened to the vehicle body frame Fr by bolts (not shown), the frame connecting portion 24 is fastened (fixed) to the vehicle body frame Fr. The predetermined fastening width L1 corresponds to a predetermined fixed width, and is a length between the uppermost fixed portion and the lowermost fixed portion in the vertical direction (in the present embodiment, fixed by the through hole 24a). The length from the top in the vertical direction to the bottom in the vertical direction fixed by the through hole 24b).

  As shown in FIG. 4, the right carrier bracket 30 includes a joint surface 31 that is in surface contact with the right side surface of the housing case 11, and an upper flange that extends from each side of the joint surface 31 so as to surround the joint surface 31. 32, a lower flange 33, and a frame connecting portion 34 as an attachment location. The right carrier bracket 30 is a mirror image of the left carrier bracket 20 except for the frame connecting portion 34. That is, the joining surface 31 of the right carrier bracket 30 corresponds to the joining surface 21 of the left carrier bracket 20, the upper flange 32 of the right carrier bracket 30 corresponds to the upper flange 22 of the left carrier bracket 20, and the bottom of the right carrier bracket 30. The flange 33 corresponds to the lower flange 23 of the left carrier bracket 20. Therefore, in the following, the frame connecting portion 34 will be mainly described, and for the convenience of description, detailed description of the members will be omitted.

  In order to fasten the right carrier bracket 30 to the vehicle body frame Fr, the right carrier bracket 30 is moved in the right direction, which is a direction away from the left side surface of the housing case 11 from the end of the joint surface 31 on the vehicle body frame Fr side. An extending frame connecting portion 34 is provided. The frame connecting portion 34 is arranged in a flange shape with respect to the end portion of the joint surface 31 extending toward the vehicle body frame Fr, so that the frame connection portion 34 can come into contact with the vehicle body frame Fr. Further, the frame connecting portion 34 is joined to the end portion of the joining surface 31 and also joined to the end portions of the upper flange 32 and the lower flange 33 on the side of the vehicle body frame Fr. As a result, the right carrier bracket 30 has sufficient rigidity to support the housing case 11 on the vehicle body frame Fr by the joint surface 31, the upper flange 32, the lower flange 33, and the frame connecting portion 34 that surround the joint surface 31. Further, the frame connecting portion 34 is provided with an extension portion 36 that constitutes an attachment location that further extends in the right direction away from the housing case 11. The extension portion 36 extends rightward from the approximate center of the side where the frame connecting portion 34 is joined to the joining surface 31.

  The frame connecting portion 34 has a fastening line C extending from the frame connecting portion 34 to the extending portion 36 along the direction in which the extending portion 36 extends. On the fastening line C, through holes as two fixing portions are set. 34a and 34b are formed penetrating at intervals of a predetermined fastening width L3. In FIG. 4, the fastening line B is a line parallel to the fastening line A. Therefore, the fastening line C perpendicular to the fastening line B is substantially perpendicular to the fastening line A and is along the fastening line A. The interval in the direction is the fastening width L2. As a result, the fastening surface on the vehicle body frame side as the fixed surface of the frame connecting portion 34 including the surface on the vehicle body frame side of the extension portion 36 is disposed opposite to the surface of the vehicle body frame Fr, so that the frame connecting portion 34 is connected to each through hole. The bolts 34a and 34b are fixed to the vehicle body frame Fr by bolts (not shown) penetrating in the direction of the vehicle body frame Fr. That is, the frame connecting portion 34 is fastened (fixed) to the vehicle body frame Fr. The fastening width L2 corresponds to a narrow fixed width, and is the length between the uppermost fixed portion and the lowermost fixed portion in the vertical direction (in this embodiment, the through holes 34a and 34b are provided in the horizontal direction. Therefore, it is the longest length in the vertical direction in the range fastened by the through hole 34a (or 34b).

  5 to 7 show the fastening when the battery pack 10 is fastened to the vehicle body frame Fr through the two through holes 24a and 24b of the left carrier bracket 20 and the two through holes 34a and 34b of the right carrier bracket 30. It is the figure which showed the part typically. The body frame Fr is assumed to extend in a horizontal direction substantially orthogonal to the vertical direction, that is, in a direction parallel to the ground.

  As shown in FIG. 5, for example, the two through holes 24a and 24b of the left carrier bracket 20 are arranged along the fastening line A extending in the vertical direction with respect to the surface of the prismatic body frame Fr, and the left carrier bracket Bolts for fastening 20 to the vehicle body frame Fr pass through them. Further, the two through holes 34a and 34b of the right carrier bracket 30 are arranged along the fastening line C extending in the left and right direction (horizontal direction) of the battery pack with respect to the surface of the vehicle body frame Fr. Bolts fastened to the frame Fr pass through them. That is, the fastening line A extends in the vertical direction, which is the direction of gravity, and the fastening line C extends in the horizontal direction intersecting the direction of gravity.

  As shown in FIG. 6, the frame connecting portion 24 of the left carrier bracket 20 is fastened to the vehicle body frame Fr via the two through holes 24a and 24b, so that the vertical direction between at least the two through holes 24a and 24b. Is the fastening width L1 (see FIG. 3) for fastening and supporting the left carrier bracket 20 to the vehicle body frame Fr. As shown in FIG. 6A, each through hole 24a, 24b is disposed so as to overlap one point when viewed from the upper side in the vertical direction, and when viewed from the side of the vehicle as shown in FIG. A through hole 24a is disposed on the upper side, and a through hole 24b is disposed on the lower side. As shown in FIG. 6C, when viewed from the rear side of the vehicle body frame Fr (on the right side of the battery pack), the through hole 24a is disposed on the upper side in the vertical direction, and the through hole 24b is disposed on the lower side.

  That is, the left carrier bracket 20 has two through holes 24a provided with a vertical force (gravity) applied to the housing case 11 on the fastening line A extending in the vertical direction with a spacing of a fastening width L1 (see FIG. 3). , 24b. Note that the fastening surface of the frame connecting portion 24 that abuts the surface of the vehicle body frame Fr also assists in supporting the force in the vertical direction.

  Further, since the frame connecting portion 34 of the right carrier bracket 30 is fastened to the vehicle body frame Fr via the two through holes 34a and 34b, the vertical spacing between the at least two through holes 34a and 34b is the right carrier. It becomes the fastening width L2 (refer FIG. 4) which fastens and supports the bracket 30 to the vehicle body frame Fr. As shown in FIG. 6A, the through holes 34a and 34b are respectively arranged with a through hole 34a on the front side and a through hole 34b on the rear side with respect to the vehicle body frame direction when viewed from the upper side in the vertical direction. As shown in (b), when viewed from the side of the vehicle, a through hole 34a is disposed on the front side and a through hole 34b is disposed on the rear side with respect to the vehicle body frame direction. Further, as shown in FIG. 6 (c), when viewed from the rear direction (the right side of the battery pack) along the vehicle body frame Fr, they are arranged to overlap each other.

  That is, the right carrier bracket 30 is provided with a vertical force (gravity) applied to the housing case 11 at intervals of a fastening width L2 (see FIG. 4) in the vertical direction, and a fastening width L3 (see FIG. 4) in the horizontal direction. 4)), and is supported by bolts fastened to the two through holes 34a and 34b provided at intervals. It should be noted that the fastening surface of the frame connecting portion 34 that comes into contact with the surface of the vehicle body frame Fr also assists in supporting the force in the vertical direction.

  Accordingly, the battery pack 10 is supported in the body frame Fr in the gravity direction by fastening the fastening width L1 with respect to the vertical direction of the left carrier bracket 20 and the fastening width L2 with respect to the vertical direction of the right carrier bracket 30. That is, since the fastening width L2 of the right carrier bracket 30 is narrower than the fastening width L1 of the left carrier bracket 20 with respect to the vertical direction that is the gravity direction, the right carrier bracket 30 supports the battery pack 10 with respect to the vertical direction. Low rigidity. Each of the through holes 34a and 34b is provided on a fastening line C extending in the horizontal direction from an intermediate position of the fastening line A connecting the two through holes 24a and 24b of the left carrier bracket 20. That is, when a line passing through the through hole 24a and a line passing through the through hole 24b are drawn in the horizontal direction to the fastening line A connecting the two through holes 24a and 24b of the left carrier bracket 20, the line passing through the through hole 24a The fastening line C and the through holes 34a and 34b are arranged in a region sandwiched between the line passing through the through hole 24b. In other words, the fastening width L2 of the right carrier bracket 30 is set to a position and width within the belt-like region that has the same width as the fastening width L1 of the left carrier bracket 20 and goes straight on the surface of the vehicle body frame Fr. ing. Since the right carrier bracket 30 is fastened to the vehicle body frame Fr by the two through holes 34a and 34b, the holding strength with respect to the vehicle body frame Fr is maintained. In the present embodiment, the horizontal fastening width L3 between the two through holes 34a and 34b is compared with the horizontal fastening width L1 between the two through holes 24a and 24b of the frame connecting portion 24. Wide but the same or narrow.

  As described above, when viewed in the vertical direction, the left carrier bracket 20 has a fastening width L1 of a predetermined length and thus has high rigidity, while the right carrier bracket 30 is a fastening that can be approximated as a one-point support. Since it is supported by the width L2, the rigidity is low. Thus, by changing the lengths of the fastening width L1 and the fastening width L2 with respect to the vertical direction, it is possible to increase the rigidity of one side and reduce the rigidity of the other side. As a result, the left carrier bracket 20 has high followability to the twist of the vehicle body frame Fr, while the right carrier bracket 30 has low followability to the twist of the vehicle body frame Fr. When the body frame Fr is twisted and the direction of the surface changes, a difference occurs in the follow-up amount in the direction of the change. The difference in follow-up amount between the two brackets absorbs the torsion applied to the battery pack 10 from the vehicle body frame Fr, whereby the torsional stress applied to the battery pack 10 is reduced. The fastening width L2 is preferably less than or equal to half of the fastening width L1. Thereby, the rigidity of the right carrier bracket 30 related to the fixing to the vehicle body frame Fr can be made sufficiently smaller than the rigidity of the left carrier bracket 20 related to the fixing, and the torsional stress applied to the battery pack 10 can be ensured. Can be reduced.

  Next, the operation of the present embodiment will be described with reference to FIG. For convenience of explanation, it is assumed that the vehicle body frame Fr is constituted by a square columnar frame member extending in the front-rear direction of the vehicle as shown in FIG. In addition, the entire frame including the vehicle body frame Fr of the vehicle has a vertical direction (vertical) from the wheel to a portion that supports the wheel by a so-called single wheel protrusion getting on the unevenness as the vehicle travels. Direction), and the entire frame is twisted. At this time, it is assumed that the vehicle body frame Fr, which is a part of the entire frame, is twisted in the direction indicated by the arrow in FIG. 5, and a phase shift different from usual occurs on the surface of the vehicle body frame Fr. For convenience of explanation, it is assumed that when the vehicle body frame Fr is twisted, a change occurs relatively on the left carrier bracket 20 side, and no change occurs on the right carrier bracket 30 side. Note that the body frame Fr may be twisted in a direction different from the arrow, such as a direction opposite to the direction indicated by the arrow in FIG. Further, it goes without saying that in any body frame, the vertical force is transmitted from the wheel, which is a support portion to the ground, so that some distortion occurs and the entire frame is twisted.

  As shown in FIG. 7, when the vehicle body frame Fr is twisted, the upper side of the vehicle body frame Fr moves to the inside of the vehicle body and the lower side moves to the outside of the vehicle body. Therefore, the through holes 24a and 24b are formed as shown in FIG. For example, the through hole 24a is arranged on the inner side of the vehicle body, and the through hole 24b is arranged on the outer side of the vehicle body. Accordingly, the fastening line A connecting the two through holes 24a and 24b is inclined with respect to the vertical direction. That is, when viewed from the upper side in the vertical direction, the arrangement that overlapped one point before twisting (see FIG. 6 (a)) is as shown in FIG. 7 (a). Arranged on the outside of the vehicle body. Further, when viewed from the side of the vehicle, each of the through holes 24a and 24b has a through hole 24a on the upper side and a through hole 24b on the lower side as in the case shown in FIG. 6B. Has been placed. However, at this time, since the fastening line A is inclined with respect to the vertical direction, it looks shorter than the fastening line A shown in FIG.

  At this time, if the right carrier bracket 30 is fastened to the vehicle body frame Fr with the same high rigidity as the left carrier bracket 20, the left carrier bracket 20 and the right carrier bracket 30 follow the torsion of the vehicle body frame Fr. All the twists generated in the vehicle body frame Fr are applied to the battery pack 10.

  On the other hand, in the present embodiment, since the through holes 34a, 34b of the right carrier bracket 30 are aligned in the horizontal direction, as shown in FIG. 7C, the vehicle body frame Fr is not affected by the twist of the vehicle body frame Fr. It becomes a mode in which one point is supported in the vertical direction. That is, the through holes 34a and 34b are rotated by the twist of the left carrier bracket 20 to some extent while being fastened to the vehicle body frame Fr. That is, the fastening line C extending in the horizontal direction connecting the two through holes 34a and 34b is like an axis with respect to the rotational direction in which the vehicle body frame Fr is twisted when the vehicle body frame Fr is twisted about the front-rear direction. become. For this reason, when viewed from the upper side in the vertical direction, as shown in FIG. 7A, the positions of the two through holes 34a and 34b do not change before and after the occurrence of the twist of the vehicle body frame Fr. Further, when viewed from the side of the vehicle, as shown in FIG. 7B, the positions of the two through holes 34a and 34b do not change before and after the occurrence of the twist of the vehicle body frame Fr.

  According to the present embodiment, when the twist generated in the vehicle body frame Fr is applied as a torsional stress to the battery pack 10 via the two carrier brackets 20 and 30, the left carrier bracket 20 causes the vehicle body frame Fr to twist. The amount that the right carrier bracket 30 follows the twist of the vehicle body frame Fr is smaller than the amount that follows. That is, the torsion of the vehicle body frame Fr is absorbed between the two carrier brackets 20 and 30 by the difference between the follow-up amount of the left carrier bracket 20 and the follow-up amount of the right carrier bracket 30. The torsional stress applied to the battery pack 10 via the brackets 20 and 30 is reduced. Thereby, the influence which the twist produced in the frame of moving bodies, such as a vehicle, has on the battery pack 10 supported by the body frame Fr can be reduced, and the protection function and electrical performance of the battery pack 10 are naturally increased. It is expected to be maintained for a long time.

  Further, the durability against the twist of the battery pack 10 can be maintained regardless of the increase in rigidity of the housing case 11, so that an increase in cost and weight of the housing case 11 can be avoided. In addition, the storage case 11 is less deteriorated due to fatigue or the like by reducing the applied twist. Thus, by improving the durability of the storage case 11, the electrical components such as the battery stack 16 stored in the battery pack 10 are naturally properly protected. That is, it is expected that the protection function and electrical performance of the battery pack 10 will be maintained for a long time.

As described above, according to the battery pack support structure of the present embodiment, the effects listed below can be obtained.
(1) When the twist generated in the vehicle body frame Fr is applied as a torsional stress to the battery pack 10 via the two carrier brackets 20 and 30, the left carrier bracket 20 follows the twist of the vehicle body frame Fr. On the other hand, the amount that the right carrier bracket 30 follows the twist of the vehicle body frame Fr becomes small. That is, the torsion of the vehicle body frame Fr is absorbed between the two carrier brackets 20 and 30 by the difference between the follow-up amount of the left carrier bracket 20 and the follow-up amount of the right carrier bracket 30. Torsional stress applied to the battery pack 10 via the brackets 20 and 30 is reduced. As a result, the influence of the twist generated in the vehicle body frame Fr on the battery pack 10 supported by the vehicle body frame Fr is reduced, and the protection function and electrical performance of the battery pack 10 are naturally maintained for a long time. Is expected to be.

  (2) Since the fastening surfaces of the two carrier brackets 20 and 30 protrude toward the vehicle body frame, there is a possibility that portions other than the two carrier brackets 20 and 30 in the battery pack 10 may interfere with the vehicle body frame Fr. small. That is, the risk that the torsion of the vehicle body frame Fr is applied to the battery pack 10 via a portion other than the carrier brackets 20 and 30 is suppressed. Thereby, the twist of the vehicle body frame Fr is suitably reduced by the carrier brackets 20 and 30.

  (3) Two carrier brackets 20 and 30 are provided in a state of being separated at both longitudinal ends of the battery pack 10 so that the battery pack 10 can be stably supported in a cantilever manner, while the two carrier brackets 20 and 30 are provided. If they are separated from each other, the influence of the twist of the vehicle body frame Fr is transmitted to the battery pack 10 more greatly. Therefore, the two carrier brackets 20 and 30 that absorb the torsion can stably support the battery pack on the frame and can reduce the torsional stress applied to the battery pack.

  (4) Even when the battery pack 10 is cantilevered by two points on both ends (the right side surface and the left side surface) of the long side (longitudinal direction) where the twist of the vehicle body frame Fr is larger than the short side, 2 The two carrier brackets 20 and 30 can suppress the twist transmitted from the vehicle body frame Fr to the battery pack 10.

  (5) Even if the battery pack 10 is attached to a vehicle in which the wheel, which is the support point for supporting the vehicle body frame Fr on the ground, moves up and down by traveling, the twist of the vehicle body frame Fr caused by traveling applies a torsional stress to the battery pack 10. To be suppressed.

  (6) Since the length of the vehicle is longer than the width in the traveling direction, the vehicle is easily twisted about the traveling direction. Even if the body frame Fr is twisted about the traveling direction, it is suppressed from being transmitted to the battery pack.

  (7) The fastening width L1 of the left carrier bracket 20 and the fastening width L2 of the right carrier bracket 30 can be set by the position of the fastening portion fastened by a bolt or the like. Thereby, the structure which reduces more that the twist of the vehicle body frame Fr is transmitted to a battery pack is easily realizable.

  (8) The fastening width L2 of the right carrier bracket 30 is within a region extending in a band shape with the fastening width L1 from the fastening width L1 of the left carrier bracket 20 in the direction from the left carrier bracket 20 to the right carrier bracket 30. The position and width are set. Thereby, the extension direction of the torsion shaft generated in the vehicle body frame Fr and the center position (middle point) of the fastening width L1 of the left carrier bracket 20 to the center position (middle point) of the fastening width L2 of the right carrier bracket 30. The direction is parallel or close to it. For this reason, the twist transmitted to the battery pack 10 is reduced.

  For example, if the direction of the fastening line C corresponding to the longitudinal direction of the fastening width of the right carrier bracket 30 is parallel to the torsion axis, the rigidity of the extension 36 of the right carrier bracket 30 with respect to the torsion axis is reduced. Since the amount of twisting force absorbed by the bracket 30 is the largest, twisting can be more suitably suppressed.

Further, the battery pack 10 can be stably fixed to the vehicle body frame Fr.
(Second Embodiment)
Hereinafter, a second embodiment of the battery pack support structure according to the present invention will be described with reference to FIGS.

  This embodiment is different from the first embodiment in that protrusions are provided on the frame connecting portion 24 of the left carrier bracket 20 and the frame connecting portion 34 of the right carrier bracket 30, respectively. The configuration is the same. Therefore, hereinafter, differences will be mainly described, and for convenience of explanation, the same reference numerals are given to the same configurations as those of the first embodiment, and the detailed description thereof will be omitted.

  As shown in FIG. 8, the left carrier bracket 20 includes a joining surface 21 that is in surface contact with the right side surface of the housing case 11, an upper flange 22, a lower flange from each side of the joining surface 21 so as to surround the joining surface 21. A flange 23 and a frame connecting portion 24 are extended.

  A spacer 25 that protrudes from the rear surface toward the vehicle body frame Fr is provided on the rear surface that is the surface of the frame connecting portion 24 and that faces the vehicle body frame Fr. The spacer 25 is made of the same metal material as the left carrier bracket 20, but may be made of other metal materials or resin materials such as engineering plastics. The spacer 25 communicates with the through holes 24a and 24b at positions corresponding to the two through holes 24a and 24b of the frame connecting portion 24, and a communication hole (not shown) that penetrates the spacer 25 is formed therethrough. ing.

  Accordingly, when the frame connecting portion 24 is disposed to face the surface of the vehicle body frame Fr, the frame connecting portion 24 is disposed to face the surface of the vehicle body frame Fr via the spacer 25. Bolts (not shown) that pass through the through holes 24a and 24b and the communication holes of the spacer 25 in the direction from the frame connecting portion 24 to the vehicle body frame Fr are fixed to the vehicle body frame Fr. Fastened to the surface of the frame Fr. That is, the left carrier bracket 20 is fastened to the vehicle body frame Fr via the spacer 25.

  As shown in FIG. 9, the right carrier bracket 30 includes a joint surface 31 that is in surface contact with the right side surface of the housing case 11, an upper flange 32, a bottom flange from each side of the joint surface 31 so as to surround the joint surface 31. The flange 33 and the frame connecting portion 34 are extended. Further, the frame connecting portion 34 is provided with an extending portion 36 that further extends in the right direction and is separated from the housing case 11.

  A spacer 35 is provided on the rear surface of the frame connecting portion 34 that faces the vehicle body frame Fr and extends in the direction in which the extension portion 36 extends, and protrudes from the rear surface toward the vehicle body frame Fr. The spacer 35 is made of the same material as the spacer 25 of the left carrier bracket 20. The spacer 35 communicates with the through holes 34 a and 34 b at positions corresponding to the two through holes 34 a and 34 b of the frame connecting portion 34, and a communication hole (not shown) that penetrates the spacer 35 is formed through therethrough. ing.

  Accordingly, when the frame connecting portion 34 is disposed to face the surface of the vehicle body frame Fr, the frame connecting portion 34 is disposed to face the surface of the vehicle body frame Fr via the spacer 35. Bolts (not shown) that pass through the through holes 34a and 34b and the communication holes of the spacer 35 in the direction from the frame connecting portion 34 to the vehicle body frame Fr are fixed to the vehicle body frame Fr. Fastened to the surface of the frame Fr. That is, the right carrier bracket 30 is fastened to the vehicle body frame Fr via the spacer 35.

  As described above, according to the battery pack support structure of the present embodiment, in addition to the effects (1) to (8) described in the first embodiment, the effects listed below can be obtained. It becomes like this.

  (9) Since the two carrier brackets 20 and 30 are fastened to the vehicle body frame Fr with the fastening surfaces interposed with the spacers 25 and 35 protruding toward the vehicle body frame, even if the vehicle body frame Fr is largely twisted, In the battery pack 10, the possibility that the portions other than the two carrier brackets 20, 30 interfere with the vehicle body frame Fr is prevented. Thereby, the twist of the vehicle body frame Fr is more preferably reduced by the carrier brackets 20 and 30.

(Third embodiment)
Hereinafter, a third embodiment of the battery pack support structure according to the present invention will be described with reference to FIG.

  This embodiment is different from the first embodiment in that the carrier bracket is provided on the side surface of the housing case on the side of the body frame, but the other configurations are the same. Therefore, hereinafter, differences will be mainly described, and for convenience of explanation, the same reference numerals are given to the same configurations as those of the first embodiment, and the detailed description thereof will be omitted.

  The storage case 11 is configured by overlapping a lower case 12 and an upper case 13. The lower case 12 has a shape that tapers from the body frame side toward the side surface of the vehicle, and thus has a wide side surface on the body frame side, and the side surface on the body frame side corresponds to the side surface on the body frame side of the housing case 11. To do.

  As shown in FIG. 10, the lower case 12 is provided with a rear side surface 12 c that is a side surface corresponding to the side surface of the housing case 11 on the vehicle body frame side and that is a long side surface. The rear side surface 12c is provided with a first carrier bracket 15A serving as a first mounting portion and a second carrier bracket 15B serving as a second mounting portion protruding from the rear side surface 12c toward the vehicle body frame Fr. . The first and second carrier brackets 15A and 15B are made of the same metal material as the left carrier bracket 20 of the first embodiment, but are made of other metal materials or resin materials such as engineering plastics. It may be configured. That is, the first carrier bracket 15A and the second carrier bracket 15B are configured to be able to support the battery pack 10 on the vehicle body frame Fr. The first carrier bracket 15A and the second carrier bracket 15B are provided at positions separated in the horizontal direction (left and right direction of the battery pack 10) with respect to the vehicle body frame Fr. In the present embodiment, the first carrier bracket 15A is disposed on the left side of the battery pack 10, and the second carrier bracket 15B is disposed on the right side of the battery pack 10, so that the first carrier bracket 15A is separated from the vehicle body frame Fr. Placed in position.

  The first carrier bracket 15A is interposed between the rear side surface 12c of the lower case 12 and the surface of the vehicle body frame Fr, and a mounting surface which is a surface fastened to the vehicle body frame Fr and a fastening surface as a fixing surface are the vehicle body frame. Fastening is performed along a fastening line A1 extending in the vertical direction with respect to Fr.

  The second carrier bracket 15B is interposed between the rear side surface 12c of the lower case 12 and the surface of the vehicle body frame Fr, and a mounting surface which is a surface fastened to the vehicle body frame Fr and a fastening surface as a fixing surface are the vehicle body frame. Fastening is performed along a fastening line C1 orthogonal to a fastening line A1 extending in the vertical direction with respect to Fr.

  As a result, the first carrier bracket 15A can maintain high rigidity in the vertical direction, while the second carrier bracket 15B has low rigidity in the vertical direction. That is, when the vehicle body frame Fr is twisted, the follower amount of the second carrier bracket 15B with respect to the vehicle body frame Fr is smaller than the first carrier bracket 15A that follows the twist, and the first carrier bracket 15A is rotated. As a result, the torsion of the vehicle body frame Fr is absorbed. As a result, the twist of the vehicle body frame Fr applied to the battery pack is reduced.

  As described above, according to the battery pack support structure of the present embodiment, in addition to the effects (1) to (8) described in the first embodiment, the effects listed below can be obtained. It becomes like this.

  (10) The distance between the carrier brackets 15 </ b> A and 15 </ b> B attached to the battery pack 10 can be made narrower than the widths at both ends of the battery pack 10. Thereby, when the vehicle body frame Fr is twisted, the twist generated between the two carrier brackets 15A and 15B can be reduced, and the stress of the twist transmitted from the carrier brackets 15A and 15B to the battery pack 10 is reduced. Will be able to.

(Other embodiments)
In addition, each said embodiment can also be implemented with the following aspects.
In each of the above embodiments, the case where the battery pack 10 is cantilevered so that the side in the longitudinal direction faces the frame is illustrated. However, the present invention is not limited to this, and the battery pack may be cantilevered so that the sides other than the longitudinal direction such as the short direction of the battery pack face the frame. Thereby, the improvement of the design freedom of the support structure of a battery pack comes to be aimed at.

  In each of the above embodiments, the case where the height of the side surface of the lower case 12 on the frame side is higher than the height of the front side surface is illustrated. However, the present invention is not limited to this, and the height of the side surface of the lower case on the frame side may be the same as the height of the front side surface, or the height of the rear side surface of the lower case may be higher than the height of the front side surface. Further, the height of the side surface on the frame side and the front side surface of the upper case may be changed according to the shape of the lower case. Thereby, the improvement of the design freedom of the storage case comprised combining a lower case and an upper case comes to be aimed at.

  In each of the above embodiments, the storage case 11 has a rectangular parallelepiped shape and a horizontally long box shape. However, the storage case is not limited thereto, and the storage case can accommodate a battery stack, an air cooling device, or the like. The shape may be a side elliptical shape, a cylindrical shape, or a polygonal column shape. Thereby, the improvement of the freedom degree of application of the support structure of a battery pack comes to be aimed at.

  In each of the above embodiments, the case where the carrier bracket (20, 30, 15A, 15B) protrudes toward the vehicle body frame is illustrated. However, the present invention is not limited to this, and a protrusion may be provided on the side of the vehicle body frame as long as it can prevent other than the bracket from interfering with the vehicle body frame.

  For example, as shown in FIG. 11, a first protrusion 40A and a second protrusion 40B are provided on the surface of the vehicle body frame Fr at positions corresponding to the widths of the two carrier brackets of the battery pack. Also good. Then, two coupling holes 41a and 41b for coupling the carrier bracket to the projecting surface 41 of the first projecting portion 40A projecting from the surface of the vehicle body frame Fr may be provided along the vertical fastening line A2. Further, one coupling hole 42a for coupling the carrier bracket may be provided on the projecting surface 42 of the second projecting portion 40B projecting from the surface of the vehicle body frame Fr. The coupling hole 42a is provided on a fastening line C2 extending in the horizontal direction from an intermediate position of the fastening line A2 connecting the two coupling holes 41a and 41b. That is, the fastening line C2 and the coupling hole 42a are arranged in a region sandwiched between a line passing through the coupling hole 41a extending in the horizontal direction and a line passing through the coupling hole 41b to the fastening line A2 connecting the two coupling holes 41a and 41b. ing.

  Accordingly, the rigidity in the vertical direction of the carrier bracket coupled to the two coupling holes 41a and 41b can be maintained high, and the rigidity in the vertical direction of the carrier bracket coupled to the one coupling hole 42a can be decreased. become able to. That is, a part of the twist generated in the vehicle body frame Fr is absorbed between the one coupling hole 42a and the carrier bracket coupled thereto, and the torsional stress applied to the battery pack can be reduced. Become.

  Further, since the fastening surface of the carrier bracket is attached to the projecting surface provided on the vehicle body frame Fr, the possibility that the portion other than the carrier bracket 20 of the battery pack 10 interferes with the vehicle body frame Fr can also be reduced.

Note that the first protrusion 40A and the second protrusion 40B may be formed by deforming the vehicle body frame Fr.
In the first embodiment, the case where the fastening width L1 of the left carrier bracket 20 is narrower than the fastening width L2 of the right carrier bracket 30 is illustrated. However, the present invention is not limited to this, and the fastening width of the right carrier bracket may be narrower than the fastening width of the left carrier bracket. In other words, if one carrier bracket fastening width is wide with respect to the vertical direction and the other carrier bracket fastening width is narrow, the rigidity of the narrower fastening width can be made lower than the rigidity of the wider fastening width. it can. Therefore, the torsional stress applied to the battery pack can be reduced by causing the carrier bracket to absorb the torsion of the vehicle body frame. Thereby, the freedom degree of the support structure of a battery pack improves.

  In each of the above embodiments, the longer fastening width (L1 etc.) with respect to the vertical direction is determined by two fastening portions (through holes 24a, 24b etc.), and the shorter fastening width (L2 etc.) can be regarded as one-point support. The case where it is determined by one fastening portion (such as the through hole 34a) is illustrated. However, the present invention is not limited to this, and the shorter fastening width may be determined by two fastening portions that are spaced in the vertical direction. Even in this case, if one of the fastening widths is wide with respect to the vertical direction and the other fastening width is narrowed, the rigidity of the narrower fastening width becomes lower than the rigidity of the wider fastening width. Therefore, the torsional stress applied to the battery pack can be reduced by causing the carrier bracket to absorb the torsion of the vehicle body frame. Thereby, the freedom degree of the support structure of a battery pack improves.

  In each of the above embodiments, the case where the carrier bracket (20, 30 or the like) is directly fastened to the vehicle body frame Fr is illustrated. However, the present invention is not limited to this, and a cushioning material may be provided between the fastening surface of the carrier bracket and the surface of the vehicle body frame to buffer the twist generated in the vehicle body frame. The material constituting the buffer material may be a metal material, a resin material, or a combination thereof. The buffer material may be elastically deformed or plastically deformed. If it is elastically deformed, twist can be repeatedly buffered. If it is plastically deformed, the battery pack can be prevented from being damaged by causing the battery pack to be deformed in response to torsional stress that would cause damage to the battery pack. Thereby, the convenience of the support structure of a battery pack can be improved.

  In addition, a connecting portion configured to be cut in response to a torsional stress that causes damage to the battery pack is provided between the battery pack and the vehicle body frame, except for the frame connecting portion (attachment location, fixing surface). May be provided. Thereby, it is possible to prevent the battery pack from being damaged.

  Further, for example, by using a bolt that deforms or comes off in response to a torsional stress that causes damage to the battery pack at the fastening portion, it is possible to prevent the battery pack from being damaged.

  In each of the above embodiments, the case where the battery pack 10 is mounted on the vehicle body frame Fr along the length direction (front-rear direction) of the vehicle is illustrated. However, the present invention is not limited to this, and the battery pack may be mounted along a direction other than the length direction (front-rear direction) of the vehicle, such as being mounted on the frame along the width direction (left-right direction) of the vehicle. If the frame also extends in the height direction, the frame may be mounted along the height direction (vertical direction), or may be mounted along the direction in which the plurality of directions are combined. Thereby, it becomes possible to suitably cope with the twisting direction which varies depending on the frame.

  In each of the above embodiments, the narrow fastening width (L2) of one carrier bracket (30) has the same width as the predetermined fastening width (L1) of the other carrier bracket (20), and the surface of the vehicle body frame Fr The case where the position and the width are set so as to be within the band-like region that goes straight upward is illustrated. However, the present invention is not limited to this, and a narrow fastening width may be set so that a part or the whole protrudes from a belt-like region having a predetermined fastening width. Even in such a case, if the narrow fastening width is narrower than the predetermined fastening width, the influence of the twist can be reduced due to the difference in the follow-up amount to the twist.

  In each of the above embodiments, the case where the carrier brackets 20 and 30 are fastened to the vehicle body frame Fr with bolts is illustrated. However, the present invention is not limited to this, and if the carrier bracket is fixed to the body frame with a necessary force, the carrier bracket may be fastened with a rivet or the like, may be fitted, or may be a welded fastening portion. It may be one that is fastened with an adhesive. Thereby, the freedom degree of a structure of a fastening part is raised and the expansion of the application range of such a support structure of a battery pack comes to be aimed at.

  In each of the above embodiments, the battery pack 10 is exemplified for supplying power to the electric motor of the truck. However, the battery pack 10 is not limited to this, and the battery pack is an electric device or electronic device other than the electric motor. It may be one that supplies power to the mounted device. Thereby, the application range of the battery pack support structure can be expanded.

  In each of the above embodiments, the case where the battery pack is fixed to the vehicle body frame Fr via the carrier bracket (20, 30 etc.) is illustrated, but the present invention is not limited to this, and the battery pack is attached to the vehicle body frame without using the carrier bracket. It may be fixed directly. Thereby, the improvement of the design freedom of a battery pack comes to be aimed at.

  In each of the above embodiments, the case where the moving body is a vehicle such as a truck has been illustrated. However, the present invention is not limited to this, and the moving body may be a railroad or the like as long as it moves with a battery pack. It may be a robot, a ship, an airplane, etc. that do not have Thereby, the application range of the battery pack support structure can be expanded.

  In each of the above embodiments, the case where the battery module is constituted by a nickel metal hydride battery has been illustrated. However, the present invention is not limited thereto, and the battery module is a secondary battery (storage battery) such as a nickel cadmium battery or a lithium ion battery. May be. As a result, the applicability of such a battery pack support structure can be improved.

  In each of the above embodiments, the case where the battery is a secondary battery has been illustrated. However, the present invention is not limited thereto, and the battery may be a primary battery.

  DESCRIPTION OF SYMBOLS 10 ... Battery pack, 11 ... Housing case, 12 ... Lower case, 12c ... Rear side surface, 13 ... Upper case, 14A ... Lower flange, 14B ... Upper flange, 15A ... First carrier bracket, 15B ... Second carrier bracket , 16 ... Battery stack, 20 ... Left carrier bracket, 21 ... Joint surface, 22 ... Upper flange, 23 ... Lower flange, 24 ... Frame connecting part, 24a, 24b ... Through hole, 25 ... Spacer, 30 ... Right carrier bracket, 31 ... joining surface, 32 ... upper flange, 33 ... lower flange, 34 ... frame connecting part, 34a, 34b ... through hole, 35 ... spacer, 36 ... extension part, 40A ... first protrusion, 40B ... second Projection, 41 ... Projection surface, 41a, 41b ... Coupling hole, 42 ... Projection surface, 42a ... Coupling hole, A, B, C, A1, A2, C1, C2 ... Fastening line, r ... body frame, L1, L2, L3 ... concluded width.

Claims (8)

A battery pack support structure in which a battery pack is cantilevered on a frame of a moving body,
In order to be cantilevered to the frame, the battery pack has two mounting locations that are separated from each other and fixed to the frame.
In a direction perpendicular to the separation direction,
One of the two attachment locations is fixed to the frame with a predetermined fixed width,
The battery pack support structure, wherein the other of the two attachment locations is fixed to the frame with a fixed width smaller than the predetermined fixed width. The battery pack is provided with a first mounting portion and a second mounting portion spaced apart from each other,
The one attachment location is provided in the first attachment portion,
The battery pack support structure according to claim 1, wherein the other attachment portion is provided in the second attachment portion. The battery pack support structure according to claim 1, wherein the two attachment locations are provided such that a fixing surface thereof protrudes toward the frame. The support structure of the battery pack according to any one of claims 1 to 3, wherein the two attachment locations are attached to the frame via a projecting surface provided on the frame. The battery pack support structure according to any one of claims 1 to 4, wherein the two attachment locations are attached to the frame via a shock absorbing material capable of absorbing stress. The predetermined fixed width of the one attachment location is a distance between two fixed portions provided in the same width direction;
The fixed width of the other attachment location is a distance between two fixed portions provided in the same width direction, or a width of one fixed portion. Battery pack support structure. The fixed width of the other mounting location is a position and width that has the same width as the predetermined fixed width of the one mounting location and fits within a band-like region parallel to the separation direction from the one mounting location. The battery pack support structure according to claim 1, wherein the battery pack support structure is set. A battery pack that is cantilevered by a frame of a moving body,
The battery pack is fixed to the frame at two mounting locations that are spaced apart so as to be cantilevered by the frame, and the battery pack is interposed between the two mounting locations. The battery pack is cantilevered by the frame by the support structure of the battery pack.

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