Support device for driving battery

Abstract

A support device for a drive battery (4) mounted on an electric vehicle is provided with: a cross-sectional # imgabs0 # bracket (7) covering the front side or the rear side of the drive battery and having a concave surface section (13) that is concave toward the drive battery (4) and a convex surface section (14) that is convex toward the drive battery (4); and an attachment member (12) for attaching a component (11) of the electric vehicle, the attachment member (12) being attached to the concave surface portion (13), a tip portion (12b) of the attachment member (12) protruding from the concave surface portion (13) toward the drive battery (4) being disposed at a position separated from the outer surface of the case (4A) of the drive battery (4) from the top surface (14a) of the convex surface portion (14) toward the concave surface portion, or at the same position as the top surface (14a).

Description

Technical Field

[0001] The present invention relates to a support device for a driving battery suitable for use in a large electric vehicle such as a truck. Background Art

[0002] In the past, from the perspective of reducing the load on the environment, electric vehicles such as electric cars, hybrid cars, and fuel cell cars that run by supplying power from a driving battery to a motor have been developed in small vehicles such as passenger cars. In addition, in recent years, electric vehicles have also been developed in the field of large vehicles such as trucks (see, for example, Patent Document 1).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2016-113063 Summary of the invention

[0006] Problems to be solved by the invention

[0007] The driving battery is mounted on the vehicle via a support member, and components such as a fuse box of a motor disposed near the driving battery may be mounted on the support member.

[0008] In this installation, fastening members such as bolts are used, but the fastening members are difficult to be arranged on the upper surface or lower surface of the supporting member in relation to the gap between the driving battery and the supporting member, and therefore are arranged on the side surfaces (including the front surface and the rear surface) of the supporting member.

[0009] However, the fastening member such as a bolt becomes a protrusion by having its head protrude toward the driving battery on the inner side of the support member.

[0010] When the driving battery moves toward the support member due to the impact of a vehicle collision, the driving battery may come into pressure contact with the protrusion and the impact load may concentrate on the pressure contact portion, thereby damaging the driving battery.

[0011] Therefore, an object of the present invention is to provide a driving battery support member including a mounting member for mounting components of an electric vehicle and capable of suppressing damage to the driving battery caused by an impact during a vehicle collision or the like.

[0012] Means for solving problems

[0013] The present application is made to solve at least a part of the above-mentioned problems and can be implemented as the following aspects or application examples.

[0014] (1) The driving battery support device of this application example is a driving battery support device mounted on an electric vehicle, and is characterized in that the driving battery support device includes: a cross-sectional A U-shaped bracket covers the front side or the rear side of the driving battery, and is composed of a side portion having a concave portion that is recessed facing the driving battery and a convex portion that is protruding facing the driving battery, as well as an upper portion and a lower portion; and a mounting component for mounting components of the electric vehicle, the mounting component being mounted on the concave portion, and a top end portion of the mounting component that protrudes from the concave portion toward the driving battery side is arranged at a position that is farther away from the top surface of the convex surface toward the concave portion side relative to the outer surface of the housing of the driving battery, or is at the same position as the top surface.

[0015] According to this application example, when a vehicle collides (front collision or rear collision), first, only the top surface of the convex portion collides with the housing of the driving battery, or the top surface of the convex portion and the top end of the mounting member collide with the housing of the driving battery at the same time, which can avoid the top end of the mounting member from partially colliding with the housing of the driving battery, and can suppress the damage to the housing of the driving battery. Therefore, safety is improved.

[0016] (2) In this application example, it is preferable that the convex surface portion is arranged at a position facing a portion of the housing having high strength.

[0017] By arranging the convex portion at a position facing the high-strength portion of the shell in this manner, the shell is less likely to be damaged even if the convex portion collides with the shell when the vehicle collides, thereby suppressing damage to the shell.

[0018] (3) In this application example, it is preferable that the convex surface portion and the concave surface portion extend linearly, and a plurality of convex surface portions are provided with the concave surface portion sandwiched therebetween.

[0019] With such a configuration, it is possible to more reliably avoid the tip end portion of the mounting member from colliding partially with the case of the driving battery, thereby suppressing the occurrence of damage to the case of the driving battery.

[0020] (4) In this application example, it is also preferable that the convex surface portion extends around the concave surface portion.

[0021] With such a configuration, it is possible to more reliably avoid the tip end portion of the mounting member from colliding partially with the case of the driving battery, thereby suppressing the occurrence of damage to the case of the driving battery.

[0022] (5) In this application example, the convex portion may be arranged so that the top surface is in surface contact with the shell.

[0023] With such a structure, it is possible to avoid the top surface of the convex portion from colliding with a part of the shell, thereby suppressing the occurrence of damage to the shell.

[0024] (6) In this application example, the component may be, for example, a fuse box of a drive motor of the electric vehicle that is disposed near the drive battery.

[0025] With such a configuration, the fuse box can be arranged with good space efficiency.

[0026] According to the present application, it is possible to suppress damage to the driving battery caused by impact during a vehicle collision or the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a perspective view showing an exploded bracket for explaining the structure of the driving battery support device according to the embodiment.

[0028] Figure 2 It is shown Figure 1 A perspective view of a support device for a driving battery shown.

[0029] Figure 3 It is shown Figure 1 A perspective view showing a driving battery assembled to a vehicle body.

[0030] Figure 4 It is a perspective view showing an example of arrangement when the driving batteries according to the embodiment are assembled to a plurality of vehicle bodies.

[0031] Figure 5 It is a side view schematically showing an example of arrangement of a driving battery and components when the driving battery according to the embodiment is assembled into a plurality of vehicle bodies.

[0032] Figure 6 It is a perspective view showing a bracket provided in the support device for the driving battery according to the embodiment.

[0033] Figure 7 yes Figure 6 A cross-sectional view of the bracket is shown, Figure 7 (a) shows the normal (no collision) state. Figure 7 (b) shows the state after the collision.

[0034] Figure 8 yes Figure 6 A cross-sectional view of a comparative example of a bracket shown in FIG. Figure 8 (a) shows the normal (no collision) state. Figure 8 (b) shows the state after the collision.

[0035] Fig. 9It is a side view schematically showing a modified example of the arrangement of the driving battery and components when the driving battery of the embodiment is assembled into a plurality of vehicle bodies.

[0036] Fig.10 It is shown Figure 6 A perspective view of a first variation of the bracket shown.

[0037] Fig.11 It is shown Figure 6 A perspective view of a second variation of the bracket shown.

[0038] Fig.12 It is shown Figure 6 A cross-sectional view of a modified example of the bracket shown, Fig.12 (a) shows a third modification example, Fig.12 (b) shows a fourth modification example. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described with reference to the accompanying drawings. The following embodiments are always merely illustrative, and there is no intention to exclude the application of various modifications and technologies not explicitly stated in the embodiments. Each structure of the following embodiments can be implemented in various modifications within the scope of their main purpose. In addition, it is possible to select or appropriately combine as needed.

[0040] [1. Composition]

[0041] [1-1. Overall composition]

[0042] like Figures 1 to 3 As shown, the support device 1 of the vehicle battery pack of the present embodiment (also simply referred to as the support device 1) is mounted on an electric truck 3 having a ladder-shaped frame 2 constituting a skeleton of the vehicle body. The electric truck 3 is an electric vehicle that travels by supplying power from a driving battery pack ("driving battery", also simply referred to as "battery pack") 4 to an electric motor not shown. In addition to pure electric vehicles that are not equipped with an internal combustion engine, hybrid vehicles and fuel cell vehicles equipped with an internal combustion engine for a driving source or power generation are also included in the electric vehicle. In addition, the electric truck 3 is also referred to as an "electric vehicle 3" or "vehicle 3".

[0043] Hereinafter, the front-to-back direction of the electric truck 3 is also referred to as the vehicle length direction D1, and the left-to-right direction of the electric truck 3 is also referred to as the vehicle width direction D2. In addition, the up-down direction orthogonal to both the front-to-back direction and the left-to-right direction is also referred to as the vehicle height direction D3. In the accompanying drawings, the front is represented by "FR", the rear is represented by "RR", the left is represented by "LH", the right is represented by "RH", the top is represented by "UP", and the bottom is represented by "DW". In addition, in Figure 3In FIG. 1 , the lower structure of the electric truck 3 is shown, and the upper structure (vehicle body) arranged above the ladder-shaped frame 2 is omitted.

[0044] The ladder frame 2 is a member constituting the framework of the electric truck 3 and has high rigidity and strength. The ladder frame 2 includes a pair of longitudinal beams 21 extending in the vehicle length direction D1 and a plurality of transverse beams 22 extending in the vehicle width direction D2 and connecting the longitudinal beams 21 to each other.

[0045] The pair of longitudinal beams 21 are arranged to be separated from each other in the vehicle width direction D2. Each longitudinal beam 21 is formed into a channel shape (U-shaped cross section) having a plate-shaped web portion 21a along the vehicle length direction D1 and the vehicle height direction D3 and a pair of plate-shaped flange portions 21b and 21c extending from the upper edge and the lower edge of the web portion 21a toward the inner side of the vehicle width direction D2.

[0046] A plurality of cross beams 22 are arranged in a manner separated from each other in the vehicle length direction D1. Here, two cross beams 22 are arranged at two locations, one overlapping with the battery pack 4 and one behind the battery pack 4 in the vehicle height direction D3. The battery pack 4 is a structure in which the necessary components are equipped in a battery case (case) 4A.

[0047] The battery pack 4 is suitable for a general high-voltage battery pack used in a passenger car, for example. In the electric truck 3, the battery pack 4 is mounted below a pair of longitudinal beams 21 and protrudes outward from each longitudinal beam 21 in the vehicle width direction D2. Here, a box-shaped battery pack 4 is exemplified, in which the dimension in the vehicle height direction D3 is smaller than the dimensions in the vehicle length direction D1 and the vehicle width direction D2 (thin). However, the shape of the battery pack 4 is not particularly limited.

[0048] The battery pack 4 has a pair of battery side surfaces 41 and 42 facing outward in the vehicle width direction D2. The pair of battery side surfaces 41 and 42 are respectively located outward in the vehicle width direction D2 relative to the pair of longitudinal beams 21. More specifically, the right battery side surface 41 is located to the right of the right longitudinal beam 21, and the left battery side surface 42 is located to the left of the left longitudinal beam 21.

[0049] Since the battery side surfaces 41 and 42 of the battery pack 4 are arranged on the outside of the longitudinal beam 21 in the vehicle width direction D2 as described above, it is ensured that the dimension of the vehicle width direction D2 is larger than the distance between the web portions 21a of the longitudinal beam 21. As a result, the battery pack 4 achieves a large capacity. In addition, in terms of ensuring the cruising range of the electric truck 3, the battery pack 4 is preferably arranged over a large range between the front axle and the rear axle. In a relatively small (shorter wheelbase) electric truck 3, one battery pack 4 may be arranged over substantially the entire area of ​​the wheelbase. In this case, the front wheel is arranged close to the front of the battery pack 4, and the rear wheel is arranged close to the rear of the battery pack 4.

[0050] In addition, the size of the electric truck 3 and the number of battery packs 4 are not limited to the examples in this embodiment. In a relatively large electric truck 3 (with a relatively long wheelbase), a plurality of battery packs 4 can be arranged in a row in the vehicle length direction D1. In this case, by configuring a plurality of battery packs 4 over a wide range of the wheelbase, the overall capacity of the battery pack 4 can be increased, and the cruising range can be ensured.

[0051] The support device 1 connects the battery pack 4 to the longitudinal beam 21 to support the battery pack 4. In other words, the battery pack 4 is supported by the longitudinal beam 21 via the support device 1. In the present embodiment, a support device 1 is exemplified that is bilaterally symmetrical (plane symmetrical) with a vertical plane passing through the center in the vehicle width direction D2 and extending in the vehicle length direction D1 as a symmetry plane.

[0052] like Figure 3 As shown, the support device 1 includes a battery side bracket 5 for accommodating a battery pack 4 and a frame side bracket (connecting bracket) 6 connecting the battery side bracket 5 and the longitudinal beam 21. The battery side bracket 5 is an outer wall body arranged on the outer periphery of the battery pack 4, and has the function of protecting the battery pack 4 from the impact load. On the other hand, the frame side bracket 6 extends from the longitudinal beam 21 to the outside and downward in the vehicle width direction D2, and has the function of suspending the battery pack 4 accommodated in the battery side bracket 5 from the longitudinal beam 21.

[0053] The battery side bracket 5 of the present embodiment includes a main bracket (front bracket) 7F configured to cover the front edge of the battery pack 4, a main bracket (rear bracket) 7R configured to cover the rear edge of the battery pack 4, an end cross beam (right bracket) 8R covering the right side edge 40RH of the battery pack 4, and an end cross beam (left bracket) 8L covering the left side edge 40LH of the battery pack 4.

[0054] The pair of main brackets 7F and 7R are of the same shape and are also referred to as main brackets 7 or brackets 7 when they are not distinguished. The pair of end beams 8R and 8L are also of the same shape and are also referred to as end beams 8, side brackets 8 or brackets 8 when they are not distinguished.

[0055] The pair of main brackets 7F and 7R are roughly symmetrically formed with a vertical plane passing through the center in the vehicle width direction D2 and extending in the vehicle length direction D1 as a symmetry plane. The main brackets 7F and 7R are also formed in a mutually symmetrical manner.

[0056] The pair of end cross members 8R, 8L are also formed symmetrically with each other in front and rear direction with the vertical plane passing through the center in the vehicle length direction D1 and extending in the vehicle width direction D2 as the symmetry plane. The end cross members 8R, 8L are also formed symmetrically with each other in the plane.

[0057] The main brackets 7F, 7R and the end cross beams 8R, 8L of this embodiment are formed of steel plates and formed into a channel shape. The battery-side bracket 5 is arranged to surround the battery pack 4 on all sides through the main brackets 7F, 7R and the end cross beams 8R, 8L.

[0058] In addition, in the present embodiment, high-strength steel is used as the material of each main bracket 7F, 7R and the end cross beams 8R, 8L (i.e., the battery side bracket 5). High-strength steel plate is, for example, a steel material whose tensile strength is defined as being greater than 490 MPa and less than 1000 MPa, but has the advantages of being thin-walled and corrosion-resistant. By using this steel material, the battery side bracket 5 and, by extension, the support device 1 can be made lighter while improving the load-bearing strength. In addition, the load-bearing strength required of the support device 1 is a strength that the support device 1 will not deform to the extent that the shell of the battery pack 4 is damaged even if it is subjected to a certain collision load when the vehicle collides (side collision, front collision, rear collision).

[0059] However, the material of the battery side bracket 5 is not limited thereto, and other steel materials or materials other than steel materials may also be used. If ultra-high strength steel having a tensile strength of 1000 MPa or more is used among steel materials with higher tensile strength, for example, it can be made even lighter, but the current situation is that ultra-high strength steel is more difficult to process than high strength steel, which also leads to increased costs. Therefore, high strength steel is used in this embodiment.

[0060] In addition, high-strength steel and ultra-high-strength steel may be defined differently depending on manufacturers, etc. Therefore, the above-mentioned 490 MPa or more and 1000 MPa are exemplarily described as approximate standards of numerical values.

[0061] Each main bracket 7F, 7R and each end cross beam 8R, 8L is channel-shaped. The main bracket 7 has a web portion (side portion) 71, an upper flange portion (upper portion) 72 and a lower flange portion (lower portion) 73. The end cross beam 8 has a web portion (side portion) 81, an upper flange portion (upper portion) 82 and a lower flange portion (lower portion) 83.

[0062] The main bracket 7F is arranged so as to cover the front edge portion 40FR of the battery pack 4. That is, the main bracket 7F is arranged so that the web portion 71 is along the front surface 43 of the battery pack 4, the upper flange portion 72 is along the portion of the upper surface 45 of the battery pack 4 close to the front surface, and the lower flange portion 73 is along the portion of the lower surface 46 of the battery pack 4 close to the front surface.

[0063] The main bracket 7R is arranged so as to cover the rear edge portion 40RR of the battery pack 4. That is, the main bracket 7R is arranged so that the web portion 71 is along the rear surface 44 of the battery pack 4, the upper flange portion 72 is along the portion of the upper surface 45 of the battery pack 4 close to the rear surface, and the lower flange portion 73 is along the portion of the lower surface 46 of the battery pack 4 close to the rear surface.

[0064] The right end cross member 8R is arranged so as to cover the right side edge 40RH of the battery pack 4. That is, the end cross member 8R is arranged so that the web portion 81 is along the right side surface 41 of the battery pack 4, the upper flange portion 82 is along the portion of the upper surface 45 of the battery pack 4 close to the right side surface, and the lower flange portion 83 is along the portion of the lower surface 46 of the battery pack 4 close to the right side surface.

[0065] The left end cross member 8L is arranged so as to cover the left side edge 40LH of the battery pack 4. That is, the end cross member 8L is arranged so that the web portion 81 is along the left side surface 42 of the battery pack 4, the upper flange portion 82 is along the portion of the upper surface 45 of the battery pack 4 close to the left side surface, and the lower flange portion 83 is along the portion of the lower surface 46 of the battery pack 4 close to the left side surface.

[0066] In addition, the main bracket 7 is pre-arranged at the front edge 40FR and the rear edge 40RR of the battery pack 4, and the end cross beam 8 is arranged at the right edge 40RH and the left edge 40LH of the battery pack 4, and the main bracket 7 and the end cross beam 8 are connected to the battery pack 4. Therefore, the flanges 72 and 73 of the main bracket 7 are arranged closer to the battery pack 4 side (inner side in the vehicle height direction D3) than the flanges 82 and 83 of the end cross beam 8.

[0067] Thus, both ends of the flanges 72 and 73 of the main bracket 7 overlap with both ends of the flanges 82 and 83 of the corresponding end cross beam 8. Figure 1 ) main bracket 7 and end cross beam 8 are connected to each other. Figure 1 In the embodiment, one overlapping portion 51 is divided and shown by a double-dashed line. Figure 1 The main bracket 7 and the end beam bracket 8 are connected by a plurality of fastening holes 90 shown in the figure and fastening tools such as bolts not shown. Regarding the fastening holes 90, three fastening holes 90 arranged in a triangular shape are grouped together here, but the number is not limited. In addition, the connection means is not limited to this, and it can be connected using some kind of fixing tool, any joining means (welding, bonding, etc.).

[0068] In addition, the web portion 81 of the end cross member 8 is arranged so as to be separated (with a gap) from the side surfaces 41 and 42 of the battery pack 4, thereby ensuring a deformation margin (absorption margin of impact load) during a collision. The deformation margin is ensured in accordance with the assumed deformation amount, but if the deformation margin is not required, the web portion 81 of the end cross member 8 can be arranged so as to contact the side surfaces 41 and 42 of the battery pack 4.

[0069] like Figure 2 As shown, the lower portions of the frame side brackets 6 are fixed to the upper portions of the overlapping portions 51 where the upper flange portions 72 and 82 of the main bracket 7 and the end cross beam 8 overlap and are joined. Figure 3 As shown in FIG. 1 , the frame side brackets 6 are fixed to the web portion 21a of the longitudinal beam 21. Therefore, two frame side brackets 6 are provided on the left and right sides of the electric truck 3 (outside the longitudinal beams 21 in the vehicle width direction D2) (four in total). In addition, the portion where the upper flange portion 72 of the main bracket 7, the upper flange portion 82 of the end cross beam 8, and the lower portion of the frame side bracket 6 are connected is called a connecting portion 50 (see FIG. 1 ). Figure 1 The connecting portion 50 is the lower portion of the frame side bracket 6 that contacts the upper flange portion 82 of the end cross beam 8, and is the entire lower surface of the frame side bracket 6 or a key portion of the lower surface thereof, and is located within the overlapping portion 51. Figure 1 In the figure, one connection portion is indicated by a two-dot chain line.

[0070] In addition, if Figure 1 As shown, in the main bracket 7 and the end cross beam 8, upper flange portions 72, 82 and lower flange portions 73, 83 protruding from the web portions 71, 81 are provided. However, the upper flange portions 72, 82 require greater load-bearing strength than the lower flange portions 73, 83, and therefore the protrusion amount P is set to be relatively large.

[0071] Since relatively high load-bearing strength is required at both ends of the main bracket 7 and the end beam 8 where the connection portion 50 and the overlap portion 51 are present, the protrusion amount P at both ends of the upper flange portions 72 and 82 is set larger than that at the middle portion.

[0072] Furthermore, a lightweight hole (weight-reducing hole) 84 is formed in a region A at the middle portion of the upper flange portion 82 of the end cross member 8, where the required load-bearing strength is relatively small. In this example, the lightweight hole 84 is composed of a plurality of small holes 84a. The small holes 84a are arranged in the same arrangement and hole diameter as the vehicle component mounting holes 21d regularly arranged vertically and horizontally on the web portion 21a of the longitudinal beam 21, and vehicle components such as various vehicle-mounted devices, pipes, and wiring harnesses can be mounted.

[0073] In addition, an opening 86 for operation and a lightweight hole (weight-reducing hole) 89 are formed in the middle of the web 81 of the end beam 8, which has a relatively low required load-bearing strength. A cover 87 is attached to the opening 86. The lightweight hole 89 is also composed of a plurality of small holes 89a similar to the vehicle component mounting hole 21d, and vehicle components 93, 94, etc. can be mounted.

[0074] As described above, by arranging the units of the plurality of battery packs 4 in the vehicle length direction D1, the overall capacity of the battery pack 4 can be increased, thereby ensuring a cruising range. Figure 4 An example is shown in which three battery packs 4 are arranged in a row in the vehicle length direction D1. Figure 5 As shown, main brackets 7 are arranged in front of and behind each battery pack 4 .

[0075] In order to efficiently mount the battery pack 4 in a limited space, the gaps (spaces, clearances) between the main bracket 7 and the battery case 4A and between adjacent main brackets 7 need to be as small as possible. The main bracket 7 is arranged from this perspective.

[0076] [1-2. Specific bracket structure]

[0077] Vehicle components that are components of the electric vehicle 3 are mounted not only to the web portion 21 a of the side member 21 and the end cross member 8 , but also to the main bracket 7 .

[0078] In this embodiment, if Figure 5 As shown, a fuse box (constituent component) 11 of an electric motor (drive motor) 10 that drives the electric vehicle 3 is mounted on the main bracket 7 .

[0079] In this example, the electric motor 10 is installed behind the battery pack 4 (here, behind the battery packs 4), so the fuse box 11 is installed on the main bracket 7 closest to the electric motor 10, that is, the main bracket 7 installed at the rear edge 40RR of the rearmost battery pack 4. Fig. 9 As shown, when the electric motor 10 is provided in front of the battery pack 4 , the fuse box 11 may be mounted on the main bracket 7 provided at the front edge portion 40FR of the main bracket 7 closest to the electric motor 10 .

[0080] As described above, the main bracket 7 has the web portion 71, the upper flange portion 72, and the lower flange portion 73. However, it is difficult to ensure installation space above and / or below the upper flange portion 72 and / or the lower flange portion 73. Therefore, the fuse box 11 is mounted on the web portion 71. In order to perform this installation, the welding bolts 12 (see FIG. 1 ) as the installation member are fixedly mounted on the web portion 71. Figure 7 (a) Figure 7 (b)).

[0081] In order to fix the welding bolt 12 on the web portion 71, an insertion hole is formed in the web portion 71, and the shaft of the welding bolt 12 is inserted from the inner side of the web portion 71 (close to the battery pack 4 side when set), and the head 12a of the welding bolt 12 is welded to the web portion 71.

[0082] The web portion 71 of the main bracket 7 is generally as follows Figure 8 As shown in (a), it is a flat plate shape. In this case, the head 12 a of the welding bolt 12 protrudes from the inner surface of the web portion 71 .

[0083] When the vehicle is in a frontal collision or a rear collision, the battery pack 4 is relatively close to the welding bolt 12. Figure 8 As shown in (b), the head 12a of the welding bolt 12 protrudes into the battery case 4A, which may cause damage such as opening a hole in the battery case 4A. If such damage occurs in the battery case 4A, it may become dangerous, so it is desired to avoid such damage to the battery case 4A as much as possible.

[0084] Therefore, in the main bracket 7 of the present supporting device 1, as Figure 6 as well as Figure 7 As shown in (a), a concave portion 13 which is recessed toward the battery pack 4 (battery case 4A) and a convex portion 14 which is protruding toward the battery pack 4 (battery case 4A) are formed on the web portion 71, and an insertion hole 15 is formed on the convex portion 14 so that the shaft portion of the welding bolt 12 can be inserted from the inner side of the web portion 71 (close to the battery pack 4 side), and the head portion 12a of the welding bolt 12 is accommodated in the concave portion 13.

[0085] In this embodiment, the convex portion 14 and the concave portion 13 extend linearly (straightly), and the convex portion 14 has a plurality of concave portions 13. In this embodiment, the convex portion 14 and the concave portion 13 extend linearly in three and two directions in the horizontal direction. Fig.10 As shown, the convex surface 114 and the concave surface 113 having the insertion hole 115 may also extend linearly in the vertical direction. The directions in which the convex surface 14, 114 and the concave surface 13, 113 extend are not particularly limited. In addition, when the convex surface 14, 114 and the concave surface 13, 113 are extended linearly, they are not limited to the linear shape.

[0086] Moreover, if Fig.11 As shown, the concave surface 213 and the convex surface 214 having the insertion hole 215 may be configured. That is, the concave surface 213 is dispersed in an island shape with respect to the convex surface 214. In this case, the convex surface 214 preferably extends so as to surround the concave surface 213.

[0087] In either case, the top end 12b of the head 12a of the welding bolt 12 housed in the concave portion 13, 113, 213 and protruding from the concave portion 13, 113, 213 toward the battery case 4A is arranged at a position that is away from the top surface 14a of the convex portion 14 or the top surface of the convex portion 114, 214 (omitted in the figure) toward the concave portion 13, 113, 213 relative to the outer surface of the battery case 4A, or at the same position as the top surface.

[0088] In any case, it is preferable that the top surface of the convex portion 14, 114, 214 is a plane parallel to the outer surface of the battery case 4A facing the convex portion 14, 114, 214 when the vehicle 3 collides. Thus, if the convex portion 14, 114, 214 comes into surface contact with the outer surface of the battery case 4A in the event of a collision, the top surface of the convex portion 14, 114, 214 will come into surface contact with the battery case 4A.

[0089] Furthermore, when there are a plurality of convex portions 14, 114, the top surfaces of the plurality of convex portions 14, 114 are preferably at the same height. In addition, from the viewpoint of dispersing the load applied to the battery case 4A during the above-mentioned vehicle collision, the top surface of the convex portion 14, 114, 214 preferably ensures as large an area as possible. Furthermore, from the viewpoint of preventing a concentrated load from being applied to the battery case 4A during the above-mentioned vehicle collision, the edges around the convex portion 14, 114, 214 (for example, the boundary portion with the concave portion 13, 113, 213) are not raised.

[0090] In addition, in this embodiment, the battery case 4A is formed of a relatively lightweight aluminum die casting. Figure 7 (a) Figure 7 In (b), as shown by the grid pattern, there is a skeleton part with higher rigidity and strength than other parts. In this embodiment, the skeleton part is arranged in the upper part, the lower part, and the middle part between the battery housing 4A along the horizontal direction. In addition, the skeleton part can be composed of a reinforcing member or a reinforcing structure that is equipped with a reinforcing member that improves rigidity and strength.

[0091] In the present embodiment, the convex surface portion 14, 114, 214 is arranged at a position facing the frame portion.

[0092] In addition, in the present embodiment, the top end 12b of the head 12a of the welding bolt 12 is arranged at a position away from the top surface of the convex portion 14, 114, 214 to the concave portion 13, 113, 213 side, but it may also be as Fig.12 As shown in (a), the tip 12b of the head 12a of the welding bolt 12 is arranged at the same position relative to the outer surface of the battery case 4A and the top surface of the convex surface 14, 114, 214. In this case, the entire length of the battery case 4A including the fuse box 11 can be made compact.

[0093] Furthermore, in the present embodiment, the top surfaces of the convex portions 14, 114, 214 are disposed at positions away from the outer surface of the battery case 4A, but may also be disposed at positions away from the outer surface of the battery case 4A. Fig.12 As shown in (b), the tip 12b of the head 12a of the welding bolt 12 is first arranged to contact the outer surface of the battery case 4A. In this case, the entire length of the battery case 4A including the fuse box 11 can be made compact.

[0094] [2. Function and effect]

[0095] Since the driving battery support device 1 of the present embodiment is configured as described above, the following operations and effects can be obtained.

[0096] (1) When a collision occurs (frontal collision or rear collision) with vehicle 3, Figure 7 As shown in (b), first, only the top surface of the convex portion 14, 114, 214 collides with the battery case 4A, or the top surface of the convex portion 14, 114, 214 and the top end 12b of the head 12a of the welding bolt 12 collide with the battery case 4A at the same time, which can avoid the head of the welding bolt 12 from partially colliding with the battery case 4A, and can suppress the damage to the battery case 4A. Therefore, safety is improved.

[0097] (2) Since the convex portion 14, 114, 214 is arranged at a position opposite to the high-strength frame portion of the battery case 4A, when the vehicle 3 collides, the battery case 4A is not easily damaged even if the convex portion 14, 114, 214 collides with the battery case 4A, and damage to the battery case 4A can be suppressed.

[0098] (3) Since the convex portion 14 and the concave portion 13 extend linearly and the convex portion 14 is provided with a plurality of concave portions 13, when the vehicle 3 collides, the head of the welding bolt 12 can be more reliably avoided from colliding with the battery case 4A locally, thereby suppressing damage to the battery case 4A.

[0099] (4) By distributing the concave surface portions 213 in an island shape relative to the convex surface portions 214 and extending the convex surface portions 214 in a manner surrounding the concave surface portions 213, when the vehicle 3 collides, it is possible to more reliably avoid a partial collision between the head of the welding bolt 12 and the battery case 4A, thereby suppressing damage to the battery case 4A.

[0100] (5) The top surface of the convex portion 14, 114, 214 is set as a plane parallel to the outer surface of the battery case 4A. When the convex portion 14, 114, 214 approaches the outer surface of the battery case 4A and collides with it, the top surface of the convex portion 14, 114, 214 is arranged in a manner that is in surface contact with the outer surface of the battery case 4A. This can avoid the top surface of the convex portion 14, 114, 214 from colliding with the battery case 4A locally, thereby suppressing the damage to the battery case 4A.

[0101] (6) Since the fuse box (constituent component) 11 of the electric motor 10 driving the electric vehicle 3 is mounted on the main bracket 7 located closer to the electric motor 10 , the fuse box 11 can be arranged with good space efficiency.

[0102] [3. Others]

[0103] The configuration of the above-described embodiment is merely an example, and can be implemented with appropriate modifications without departing from the gist of the present invention.

[0104] For example, in the above-mentioned embodiment, an example in which the support device for a driving battery is applied to a truck is described, but the support device for a driving battery of the present application can also be applied to vehicles other than trucks.

[0105] Furthermore, in the above-described embodiment, the support device for the driving battery is connected to and supported by the side member 21 , but it may be connected to and supported by a structural element of the vehicle other than the side member 21 .

[0106] The shapes of the concave surface portions 13 , 113 , 213 and the convex surface portions 14 , 114 , 214 are not limited to those in the above-described embodiment, and may be various shapes.

[0107] Furthermore, in the above-described embodiment, the fuse box 11 is exemplified as a component of the electric vehicle, but the configuration of the main bracket 7 of the support device 1 can also be applied to mounting of various other components.

[0108] In the above-described embodiment, the weld bolt 12 is exemplified as the mounting member, but the mounting member is not limited thereto, and for example, a weld nut or the like may also be applied.

[0109] In addition, in the above-mentioned embodiment, although Figure 3 As shown, the driving battery 4 and the supporting device 1 for the driving battery are arranged outside the longitudinal beam 21 in the vehicle width direction, but the driving battery and the supporting device for the driving battery of the present application can also be stored between the left and right longitudinal beams 21. The size, shape, or mounting of the driving battery on the longitudinal beams, etc. can be appropriately changed as needed.

[0110] [4. Note]

[0111] The following supplementary notes are further disclosed with respect to the above-mentioned embodiments.

[0112] (Note 1)

[0113] A driving battery support device is a driving battery support device mounted on an electric vehicle, characterized in that:

[0114] The driving battery support device comprises:

[0115] section A bracket in the shape of a letter "U", covering the front side or the rear side of the driving battery, and comprising a side portion having a concave portion facing the driving battery and a convex portion facing the driving battery, as well as an upper portion and a lower portion; and

[0116] A mounting member for mounting components of the electric vehicle,

[0117] The mounting member is mounted on the concave surface portion,

[0118] The tip portion of the mounting member protruding from the concave portion toward the driving battery is arranged at a position farther away from the top surface of the convex portion toward the concave portion relative to the outer surface of the driving battery case or at the same position as the top surface.

[0119] (Note 2)

[0120] The driving battery support device according to Supplementary Note 1 is characterized in that the convex surface portion is arranged at a position facing a portion of the case having high strength.

[0121] (Note 3)

[0122] The driving battery support device according to Appendix 1 or 2, characterized in that the convex surface portion and the concave surface portion extend linearly.

[0123] The convex surface portion is provided in plurality with the concave surface portion sandwiched therebetween.

[0124] (Note 4)

[0125] The driving battery support device according to Supplementary Note 1 or 2 is characterized in that the convex surface portion extends around the concave surface portion.

[0126] (Note 5)

[0127] The driving battery support device according to any one of Supplementary Notes 1 to 4, wherein the convex portion is arranged so that the top surface is in surface contact with the case.

[0128] (Note 6)

[0129] The driving battery support device according to any one of Supplementary Notes 1 to 5, wherein the component is a fuse box of a driving motor of the electric vehicle.

[0130] Description of Reference Numerals

[0131] 1. Support device for driving battery (support device)

[0132] 2Ladder shaped frame

[0133] 3 Electric Trucks (Electric Vehicles, Vehicles)

[0134] 4 Driving battery pack (driving battery, battery pack)

[0135] 4A battery housing

[0136] 5 Battery side bracket

[0137] 6 Frame side bracket (connecting bracket)

[0138] 7F, 7 Main bracket (front bracket)

[0139] 7R, 7 Main bracket (rear bracket)

[0140] 8R, 8 end beam (right bracket)

[0141] 8L, 8 end beam (left bracket)

[0142] 10 Electric motor (drive motor)

[0143] 11 Fuse box (component)

[0144] 12 welding bolts (mounting components)

[0145] 12a Head of welding bolt 12

[0146] 12b is the top end of the head 12a of the welding bolt 12

[0147] 13, 113, 213 concave surface

[0148] 14, 114, 214 convex face

[0149] 14a The top surface of the convex portion 14

[0150] 15, 115, 215 through holes

[0151] 21 Stringer

[0152] 21a web portion of the longitudinal beam 21

[0153] 21b, 21c flange portion of the longitudinal beam 21

[0154] 21d Holes for mounting vehicle components

[0155] 22 Beam

[0156] Front edge of 40FR battery pack 4

[0157] The rear edge of the 40RR battery pack 4

[0158] Right edge of 40RH battery pack 4

[0159] The left edge of the 40LH battery pack 4

[0160] 41 Right side of battery 4

[0161] 42 Left side of battery 4

[0162] 43 front surface of battery pack 4

[0163] 44 Rear surface of battery pack 4

[0164] 45 upper surface of battery pack 4

[0165] 46 The lower surface of the battery pack 4

[0166] 50 Connection

[0167] 51 Overlap

[0168] 71 web portion (side portion) of main bracket 7

[0169] 72 upper flange portion (upper portion) of main bracket 7

[0170] 73 lower flange portion (lower portion) of main bracket 7

[0171] 81 web portion (side portion) of end beam 8

[0172] 82 upper flange (upper part)

[0173] 83 lower flange part (lower part)

[0174] 84 lightweight holes (weight reduction holes)

[0175] 84a is a small hole as a lightweight hole 84

[0176] 85 lightweight holes (weight reduction holes)

[0177] 86 Opening

[0178] 87 Cover

[0179] 89 lightweight holes (weight reduction holes)

[0180] 89a is a small hole as a lightweight hole 89

[0181] 90 Fastening hole

[0182] 91 Insert hole

[0183] 92, 93, 94 vehicle parts

[0184] D1 Vehicle length direction

[0185] D2 Vehicle width direction

[0186] D3 Vehicle height direction

[0187] L1, L2 boundary line

[0188] FR Front

[0189] RR Rear

[0190] LH Left

[0191] RH Right

[0192] UP

[0193] DW Below

[0194] The protrusion amount of the flange portions 72, 82, 73, 83 from the web portions 71, 81

Claims

1. A driving battery support device, which is a driving battery support device mounted on an electric vehicle, characterized in that: The driving battery support device comprises: section A bracket in the shape of a letter "U", covering the front side or the rear side of the driving battery, and comprising a side portion having a concave portion facing the driving battery and a convex portion facing the driving battery, as well as an upper portion and a lower portion; and A mounting member for mounting components of the electric vehicle, The mounting member is mounted on the concave surface portion, The tip portion of the mounting member protruding from the concave portion toward the driving battery is arranged at a position farther away from the top surface of the convex portion toward the concave portion relative to the outer surface of the driving battery case or at the same position as the top surface.

2. The driving battery support device according to claim 1, characterized in that: The convex surface portion is arranged at a position facing a portion of the housing having high strength.

3. The driving battery support device according to claim 1, characterized in that: The convex portion and the concave portion extend linearly. The convex surface portion is provided in plurality with the concave surface portion sandwiched therebetween.

4. The driving battery support device according to claim 1, characterized in that: The convex surface portion extends around the concave surface portion.

5. The driving battery support device according to claim 1, characterized in that: The convex surface portion is arranged so that the top surface is in surface contact with the housing.

6. The driving battery support device according to any one of claims 1 to 5, characterized in that: The component is a fuse box of a drive motor of the electric vehicle.

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