Vehicle battery mounting structure

Abstract

Vehicle battery mounting structure (10) of a vehicle comprising: a lower battery frame element (26) made of fiber-reinforced resin, arranged on inner sides of energy absorption elements (70) on the underside of a floor plate (12) of the vehicle in a transverse direction, comprising a floor plate (27) and inclined walls (28) formed at outer end sections of the floor plate (27) in a transverse direction and extending outwards upwards in a transverse direction, and which together with an upper battery frame element (22) forms a battery frame (20) and supports a battery (16);and a lower element (46) comprising: a lower main body section (47) connected to the outer end sections in the transverse direction of the vehicle, and lower flange sections (48) attached to one side of a lower surface of the lower plate, characterized in that the lower element (46) is a deformable element, and sections of the lower main body section (47) are designed as raised sections (47C), wherein the raised sections (47C) gradually move away from the inclined walls (28) from the outside in the transverse direction of the vehicle to the inside in the transverse direction of the vehicle, and areas between the inclined walls (28) and the raised sections (47C) are filled with an adhesive (G) and thereby bonded.

Description

Technical field

[0001] The present invention relates to a vehicle battery mounting structure. State of the art

[0002] A structure is known in which a battery frame, in which a battery for propulsion is accommodated, which is arranged on the underside of the floor section of an electric car, is constructed in such a way that it comprises a battery tray made of resin and a frame-shaped frame made of metal and arranged on the side of the outer wall of the battery tray (see, for example, Japanese patent publication JP 2001-124101 A. BRIEF DESCRIPTION OF THE INVENTION Technical Problem

[0003] However, if the battery frame has the structure described above, there are concerns that fractures may occur at the sections where the battery tray is connected to the frame-like structure due to a collision load resulting from a side impact of the vehicle. Therefore, there is room for structural improvement to prevent fractures in a resin-based battery frame during a side impact.

[0004] Therefore, an object of the present invention is to provide a vehicle battery mounting structure that prevents the occurrence of a breakage of a battery frame made of resin in a side collision of a vehicle. Solution to the problem

[0005] To solve the problem described above, a vehicle battery mounting structure of a first aspect of the present invention comprises a lower battery frame element, wherein the lower battery frame element is made of resin, wherein the lower battery frame element is arranged on inner sides of energy absorption elements on the underside of a base plate in a transverse direction of the vehicle, and wherein the lower battery frame element, together with an upper battery frame element, forms a battery frame and the battery frame element supports a battery; a lower deformable element comprising: a lower main body section, wherein the lower main body section is connected to inner sections of the lower battery frame element in the transverse direction of the vehicle, and lower flange sections, wherein the lower flange sections are fixed on one side of a lower surface of the lower plate;and inclined walls, wherein the inclined walls are formed at the outer end sections of the lower battery frame element in the transverse direction of the vehicle, and wherein the inclined walls are inclined from the outer top in the transverse direction of the vehicle to the inner bottom in the transverse direction of the vehicle.

[0006] According to the first aspect of the present invention, the inclined walls, which slope from the outer top in the transverse direction of the vehicle to the inner bottom in the transverse direction of the vehicle, are formed at the outer end sections of the lower battery frame element to which the lower main body section is connected. Consequently, in a side collision of the vehicle, the collision load acting on the lower battery frame element from the energy absorption element is transferred in the directions in the plane of the lower battery frame element and the lower main body section (inwards in the transverse direction of the vehicle). In particular, a bending moment in the out-of-plane direction with respect to the lower battery frame element and the lower main body section can only increase to a limited extent. Consequently, the occurrence of a fracture in the lower battery frame element (the battery frame) is prevented.

[0007] Furthermore, a vehicle battery mounting structure according to a second aspect of the present invention is the vehicle battery mounting structure according to the first aspect, wherein sections of the lower main body sections are designed as raised sections, wherein the raised sections gradually move away from the inclined walls from the outside in the transverse direction of the vehicle to the inside in the transverse direction of the vehicle, and areas between the inclined walls and the raised sections are filled with an adhesive and thereby bonded.

[0008] According to the second aspect of the present invention, sections of the lower main body section are designed to be raised sections that gradually move away from the inclined walls from the outside in the transverse direction of the vehicle towards the inside in the transverse direction of the vehicle, and the areas between the inclined walls and the raised sections are filled with and bonded by an adhesive. In particular, the adhesive between the inclined wall and the raised sections is designed to gradually increase in thickness from the outside in the transverse direction of the vehicle towards the inside in the transverse direction of the vehicle.Consequently, in a side collision, the impact load transmitted in the plane of the lower battery frame element and the lower main body sections (inwards in the transverse direction of the vehicle) is absorbed and reduced by the adhesive located between the inclined wall and the raised sections. This further reduces or prevents the occurrence of a fracture in the lower battery frame element (the battery frame).

[0009] Furthermore, a vehicle battery mounting structure according to a third aspect of the present invention is the vehicle battery mounting structure according to the second aspect, wherein the plate elements of the end sections of the raised sections project inwards in the transverse direction of the vehicle.

[0010] According to the third aspect of the present invention, the plate elements, which project inwards from the inner end sections of the raised sections in the transverse direction of the vehicle, are arranged on these raised sections. Consequently, even if the inner end sections of the raised sections are covered with an adhesive, a water droplet that has come into contact with the upper surface of the raised section is transferred along the plate element and runs off onto the upper surface of the lower battery frame element. This prevents the occurrence of galvanic corrosion on the raised sections.

[0011] Furthermore, a vehicle battery mounting structure according to a fourth aspect of the present invention is the vehicle battery mounting structure according to one of the first to the third aspects, wherein vertical walls extending upwards are formed at inner end sections of the inclined walls in the transverse direction of the vehicle.

[0012] According to the fourth aspect of the present invention, vertical walls extending upwards are formed at the outer end sections of the inclined walls in the transverse direction of the vehicle. Consequently, in the event of a side collision of the vehicle, the collision load is effectively transferred from the energy absorption element via the vertical wall to the lower battery frame element and the lower main body section (the battery frame).

[0013] Furthermore, a vehicle battery mounting structure according to a fifth aspect of the present invention is the vehicle battery mounting structure according to one of the first to the fourth aspects, which further comprises an upper deformable element with an upper main body section and upper flange sections, wherein the upper main body section is connected to end sections of the upper battery frame element that are outer in the transverse direction of the vehicle, and wherein the upper flange sections, together with the lower flange sections, are fixed on the side of the lower surface of the lower plate, wherein inclined sections are formed on the sides of the upper main body section of the upper flange sections, and wherein the inclined sections are inclined from the outer top in the transverse direction of the vehicle to the inner bottom in the transverse direction of the vehicle.

[0014] According to the fifth aspect of the present invention, the inclined sections, which slope from the outer top in the transverse direction of the vehicle to the inner bottom in the transverse direction of the vehicle, are formed on the sides of the upper main body section of the upper flange sections. Consequently, in the event of a side collision of the vehicle, the upper flange section can easily bend, with the boundary section between the upper flange section and the upper main body section being the pivot point, thus reducing the load to which the battery frame is subjected. Advantageous effects of the invention

[0015] As described above, according to the first aspect of the present invention, in the event of a side collision of a vehicle, the occurrence of a breakage in a battery frame made of resin can be prevented.

[0016] According to the second aspect of the present invention, the occurrence of a break in a battery frame made of resin in the event of a side collision of a vehicle can be further reduced or prevented.

[0017] According to the third aspect of the present invention, the occurrence of galvanic corrosion on elevated sections can be prevented.

[0018] According to the fourth aspect of the present invention, in the event of a side collision of a vehicle, the collision load can be effectively transferred from an energy absorption element to a battery frame.

[0019] According to the fifth aspect of the present invention, in the event of a side collision of a vehicle, the load to which a battery frame is subjected can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Fig. Figure 1 is a sectional view from the front showing a vehicle battery mounting structure according to a present embodiment.

[0021] Fig. Figure 2 is a perspective exploded view showing a battery frame and deformable element that form the vehicle battery mounting structure according to the present embodiment.

[0022] Fig. Figure 3 is a front sectional view showing an enlarged section of the vehicle battery mounting structure according to the present embodiment.

[0023] Fig. Figure 4 is a sectional view from the front showing a condition in which a vehicle in which the vehicle battery mounting structure is installed according to the present embodiment collides laterally with a mast or post.

[0024] Fig. Figure 5 is a perspective view showing an enlarged section of the vehicle battery mounting structure according to the present embodiment.

[0025] Fig. Figure 6 is a front sectional view showing an enlarged section of the vehicle battery mounting structure according to the present embodiment.

[0026] Fig. Figure 7A is a front sectional view showing a condition in which a vehicle, in which a vehicle battery mounting structure is fitted according to a comparative example, collides laterally with a mast or post.

[0027] Fig. Figure 7B is a front sectional view that magnifies a section of the vehicle battery mounting structure according to the comparison example. DESCRIPTION OF EXECUTION FORMS

[0028] An embodiment of the present invention is described in detail below with reference to the drawings. It should be noted that, for the sake of clarity, an arrow marked UP, as shown in the respective drawings, points upwards with respect to the vehicle, an arrow marked FRONT points forwards with respect to the vehicle, and an arrow marked INWARDS points inwards in the transverse direction of the vehicle. Furthermore, in the following description, when the vertical, longitudinal, and right / left directions are mentioned, these refer to the vehicle's height, longitudinal direction, and left / right direction, respectively (the transverse direction of the vehicle), unless otherwise stated. Additionally, although the respective drawings show the left side of the vehicle body, the vehicle body has mirror symmetry, and the right side of the vehicle body is omitted where expedient.

[0029] As it is in Fig. As shown in 1, there is a pair consisting of a left and a right bottom element (side frame). 14 , which extend in the longitudinal direction of the vehicle body and form a vehicle body frame structure, with the lower surface of a base plate 12 connected, which is made of metal and forms the floor section of a vehicle body. The lower elements 14 are made of metal and in cross-section each have essentially the shape of a hat, and flange sections 15 , protruding in the transverse direction of the vehicle, are welded or similarly on both sides in the transverse direction of end sections to the lower surface of the base plate 12 connected and fixed to it.

[0030] Furthermore, there are several through holes. 14A for inserting flange bolts 58 , which are described below, in the lower element 14formed along its longitudinal direction (the longitudinal direction of the vehicle body). Furthermore, weld nuts are 52 on the upper surface of the lower element 14 coaxial with the respective through holes 14A arranged.

[0031] A vehicle battery mounting structure 10 According to the present embodiment, which is applied to a vehicle such as an electric vehicle or the like, the underside of the vehicle body's floor plate is located on the underside of the floor plate. 12 arranged and includes a battery frame (a stacking frame) 20 , which includes a fuel cell stack 16 , which serves as a battery, is supported by the underside of the vehicle body. This battery frame 20 is made from a fiber-reinforced resin (FRP), e.g., from a carbon fiber reinforced hard material (CFRP).

[0032] An outer section 17 of the fuel cell stack 16It is made of metal (or resin) in the form of a cuboid box, and leg sections 18 , which protrude outwards in the transverse direction of the vehicle, are located at several predetermined points on the lower circumferential end section of this outer section. 17 formed. Furthermore, a through hole is present. 18A , which is used to insert the flange screw 58 , which is described below, is intended to be in each of the leg sections 18 educated.

[0033] As it is in Fig. 1 and Fig. As shown in section 2, the battery frame includes 20 an upper frame 22 , which serves as an upper battery frame element, a lower frame 26 , which serves as a lower battery frame element, and an inner frame 30 , which serves as an intermediate element (reinforcing element) and is located between the upper frame 22 and the lower frame 26 is arranged.

[0034] The upper frame 22 includes a top plate 23 , which has the shape of a rectangular, flat plate and is arranged horizontally, inclined walls 24 , each having the form of a rectangular, flat plate and a one-piece, continuous continuation of the two end sections in the transverse direction of the vehicle (the outer end sections) of the upper plate 23 form diagonally upwards and outwards in the transverse direction of the vehicle, so that they extend along inclined walls 36 extend, which are described below, and flange sections 25 , each having the shape of a rectangular plate and a one-piece, continuous continuation of the two end sections in the transverse direction of the vehicle of the inclined walls 24 form, which extend essentially horizontally outwards in the transverse direction of the vehicle, so that they run along the upper walls 37extend, which are described further below.

[0035] The lower frame 26 includes a base plate 27 , which has the shape of a rectangular, flat plate and is arranged horizontally, inclined walls 28 , each having the form of a rectangular, flat plate and a one-piece, continuous continuation of the respective of the two end sections in the transverse direction of the vehicle (the outer end sections) of the floor plate 27 form side wall sections that are inclined at a predetermined angle upwards and outwards in the transverse direction of the vehicle (from the outer top sides to the inner bottom sides in the transverse direction of the vehicle), and side wall sections 29, each having the form of a rectangular, flat plate, serving as vertical walls and forming a single, continuous and essentially perpendicular continuation to the upper surface of the vehicle body of the two end sections in the transverse direction of the vehicle (outer end sections) of the inclined walls 28 form.

[0036] It should be noted that the side wall sections 29 possess such a height that they essentially define the border sections 49 between lower flange sections 48 and side wall sections 47D on a lower main body section 47 a lower, deformable element 46 , which is described below, reach (extend to that point) when the lower, deformable element 46 with the lower frame 26 is connected. In other words, the upper end faces of the side wall sections. 29are essentially at the same height as the upper end faces of block sections 73 on internal elements 72 of energy absorption elements 70 , which are described below.

[0037] As it is in Fig. As shown in 2, the inner frame includes 30 a main body section 32 , in which convex sections 33 , which are essentially hat-shaped in cross-section and extend in the transverse direction of the vehicle, are arranged in several rows (e.g. five rows) in the longitudinal direction of the vehicle body, and projecting sections 34 , located at the two end sections in the transverse direction of the vehicle of the main body section 32 are formed in such a way that they are a continuous continuation of the upper surfaces of the convex sections 33 form and protrude towards the top of the vehicle body.

[0038] The inner sides of the projecting sections in the transverse direction of the vehicle 34 are each as inclined walls 36 formed, each a single, continuous extension from the upper surfaces of the convex sections 33 form and extend upwards and outwards in the transverse direction of the vehicle. The upper walls 37 , which are essentially horizontal, form a single, continuous continuation of the upper end sections of the inclined walls 36 in the transverse direction of the vehicle outwards. Furthermore, the outer end sections of the projecting sections in the transverse direction of the vehicle. 34 as front surface sections 38 formed, the cross-sections being essentially perpendicular to the main body section 32 are. In particular, the leading sections possess 34 Viewed from the longitudinal direction of the vehicle body (viewed from a front view), it is essentially the shape of a trapezoid.

[0039] Furthermore, the lower surface of the upper plate 23 of the upper frame 22 by means of an adhesive with the upper surfaces of the respective convex sections 33 of the inner frame 30 connected, and the upper surface of the base plate 27 of the lower frame 26 is bonded to the lower surface of the main body section by an adhesive. 32 of the inner frame 30 connected. This connects the battery frame. 20 , which has a rectangular, closed cross-sectional shape, generally structured.

[0040] It should be noted that, as it is in Fig. Figure 1 shows the through holes. 23A , 33A , which are connected to each other at several predetermined points on the upper plate 23 of the upper frame 22 and the convex sections 33 of the inner frame 30 formed, and flange bolts54 are bonded to the lower surfaces of the convex sections by an adhesive. 33 coaxial with the respective through holes 23A , 33A connected. Furthermore, collar elements are 56 , which are cylindrical and made of metal, one-piece and coaxial with the upper surfaces of the respective flange bolts 54 trained, and the respective collar elements 56 are in the respective through holes 23A , 33A introduced.

[0041] Therefore, the fuel cell stack 16 by stacking the fuel cells 16 so on the upper surface of the upper frame 22 (the upper plate 23 ) is arranged so that the through holes 18A the leg sections 18 and through holes 56A the collar elements 56 are connected to each other, and by the fact that the flange bolts 58from the top of the vehicle body through the through holes 18A and the through holes 56A guided and with the flange bolts 54 are screwed to the battery frame 20 (the upper frame 22 and the inner frame 30 ) attached and fixed.

[0042] Furthermore, as is stated in Fig. 1 and Fig. 2 shows the upper main body sections. 43 a pair consisting of a left and right upper deformable element 42 , each representing the top surface of a deformable element 40 form, with the upper surfaces of the inclined walls 24 and the flange sections 25 of the upper frame 22 connected. In particular, the longitudinal direction of the vehicle body is the longitudinal direction of the upper, deformable elements. 42 , and the lower surfaces of the upper main body sections 43, which are the inner end sections of the upper, deformable elements in the transverse direction of the vehicle 42 are bonded to the upper surfaces of the inclined walls by an adhesive. 24 and the flange sections 25 of the upper frame 22 tied together.

[0043] Furthermore, upper flange sections form 44 , which are from the flange sections 25 of the upper frame 22 and the frontal surface sections 38 (the battery frame 20 ) of the inner frame 30 protrude outwards in the transverse direction of the vehicle (i.e., the outer sections of the upper, deformable elements in the transverse direction of the vehicle). 42 are), one-piece and continuous continuations of the inner sections of the upper main body sections in the transverse direction of the vehicle. 43 .

[0044] In contrast, the lower main body section 47 of the lower, deformable element46 , which is the underside of the deformable element 40 forms, with the upper surfaces of the respective inclined walls 28 of the lower frame 26 connected. In particular, the lower, deformable element includes 46 the lower main body section 47 , which has the form of a rectangular frame. The lower surfaces of cantilever sections 47B (the raised sections) 47C include), which are described below, the lower main body sections 47 are made by an adhesive agent G (see Fig. 1, Fig. 3) with the upper surfaces of the inclined walls 28 of the lower frame 26 tied together.

[0045] Therefore, the inner framework 30 on the inside of the lower main body section 47 arranged, and in this state the lower surface of the main body section 32through an adhesive with the upper surface of the base plate 27 of the lower frame 26 Furthermore, the two end sections are connected in the longitudinal direction of the vehicle body of the lower main body section. 47 convex sections 47A , each of which has essentially the shape of a hat in cross-section and extends in the transverse direction of the vehicle. The upper surfaces of these convex sections 47A are together with the upper surfaces of the respective convex sections 33 of the inner frame 30 through an adhesive with the lower surface of the upper plate 23 of the upper frame 22 tied together.

[0046] Furthermore, the cantilever sections form 47B , each having the shape of a rectangular, flat plate and positioned at the same angle in the transverse direction of the vehicle as the inclined walls 28with respect to the horizontal direction (from the outer top in the transverse direction of the vehicle to the inner bottom in the transverse direction of the vehicle), projecting inwards, one-piece continuations of the two end sections in the transverse direction of the lower main body section. 47 Furthermore, the raised sections 47C , which are cut out and lifted to gradually move from the inclined walls from the outside in the transverse direction of the vehicle to the inside in the transverse direction of the vehicle 28 to remove, on sections of the cantilever sections 47B (the lower main body sections) 47 ) formed, which are the leading sections 34 of the inner frame 30 correspond (are opposite each other).

[0047] In particular, the multiple (e.g. five) raised sections 47C at the cantilever sections 47Bbent or curved so that they are separated from each other at a predetermined distance (e.g. at a uniform distance) in the longitudinal direction of the vehicle body, and the respective raised sections 47C are in the respective lead sections 34 introduced. Furthermore, the lower surface is on the sides of the projecting sections. 34 of the main body section 32 of the inner frame 30 by an adhesive to the upper surfaces of the cantilever sections 47B , but not the high-level sections 47C connected. This results in a structure in which the cantilever sections 47B , but not the high-lying sections 47C , through the lower frame 26 and the inner frame 30 are trapped and fixed in place.

[0048] It should be noted that, as shown in Fig. 3, the inner end sections in the transverse direction of the vehicle, as well as the raised sections 47C are inclined at a predetermined angle from the outside top in the transverse direction of the vehicle to the inside bottom in the transverse direction with respect to the horizontal direction (an angle that is smaller than the angle of the inclined walls) 28 is). This results in a structure in which water droplets that enter the projection sections 34 have penetrated along the upper surfaces of the raised sections 47C to be transported and further inwards in the transverse direction of the vehicle than up to the raised sections 47C runoff. In particular, it forms on the upper surfaces and the inner end sections in the transverse direction of the vehicle (especially the underside edge line sections). 47Cd ) the high-lying sections 47C hardly any rust.

[0049] In particular, the adhesive G is used to join the raised sections. 47C with the sloping walls 28 The thickness gradually increases from the outer edge (in the transverse direction of the vehicle) to the inner edge (in the transverse direction of the vehicle). Furthermore, the maximum thickness at this inner end section (a distance between the inclined wall) is... 28 and the lower edge line section 47Cd at the inner end section of the raised section in the transverse direction of the vehicle 47C ) H, for example, H = 4.5 mm. This results in a structure in which, even if a water droplet adheres to the inner end section of the adhesive G in the transverse direction of the vehicle due to surface tension, this water droplet does not adhere to the underside edge line section. 47Cd of the elevated section 47C not touched.

[0050] In other words, the maximum thickness (the interval between the lower edge line section) 47Cd and the inclined wall 28 ) H at the inner end section of the adhesive G in the transverse direction of the vehicle is determined such that even if a water droplet adheres to the inner end section of the adhesive G in the transverse direction of the vehicle due to surface tension, this water droplet does not extend the lower edge line section 47Cd of the elevated section 47C not touched. This prevents the formation of rust caused by galvanic corrosion, especially on the lower edge sections. 47Cd the high-lying sections 47C reduces or prevents.

[0051] Furthermore, as can be seen in Fig. 5 and Fig. 6 is shown when the raised sections 47C through the adhesive G with the inclined walls 28are connected, it is achieved that the adhesive G separates from the inner end sections of the raised sections in the transverse direction of the vehicle. 47C protrudes and the inner end sections in the transverse direction of the vehicle (especially the lower edge line sections) 47Cd ) the high-lying sections 47C are covered with this adhesive G, which is bulged and swollen. This prevents the formation of corrosion, particularly on the lower edge sections, caused by galvanic corrosion. 47Cd the high-lying sections 47C further reduces or prevents the formation of rust.

[0052] It should be noted that the inner sections of the plate elements in the transverse direction of the vehicle 80 , which are made of resin and are located at the inner end sections of the raised sections in the transverse direction of the vehicle 47Cprotrude inwards in the transverse direction of the vehicle, secured in advance to the upper surfaces of the raised sections with double-sided adhesive tape or similar. 47C to be attached. With such a structure, the bumps, which are sections of adhesive G, are attached to the inner end sections of the raised sections in the transverse direction of the vehicle. 47C protrudes through the plate elements 80 Therefore, water droplets that fall into the protruding sections are held down. 34 have penetrated along the upper surfaces of the raised sections 47C and the upper surfaces of the panel elements 80 transported and flowing further inwards in the transverse direction of the vehicle than up to these plate elements 80 .

[0053] In particular, the path of the water droplet, which starts from the upper surface of the raised section, is 47C to the upper surface of the lower frame26 wanders through the plate element 80 formed, whereby at least the lower edge line section 47Cd is in a state in which it is covered by the adhesive G, which is attached to the inner end section of the raised section in the transverse direction of the vehicle. 47C is bulging and swollen. Consequently, even if there is a structure in which the inner end section in the transverse direction of the vehicle (especially the lower edge line section) is 47Cd ) of the elevated section 47C The adhesive G is used to prevent a water droplet from landing on the upper surface of the raised section. 47C migrates, and the formation of rust through galvanic corrosion on the upper surface of the raised section 47C can be reduced or prevented.

[0054] It should be noted that the thickness of the plate element 80For example, 0.5 mm and the thickness of the double-sided adhesive tape is, for example, 0.2 mm. Furthermore, although the plate element shown 80 not on the middle section of the raised section in the transverse direction (vehicle longitudinal direction). 47C The fastening position of the plate element is attached. 80 is not limited to this position.

[0055] Furthermore, through holes 26A , which are circular, for example, in the lower frame 26 formed, specifically further inwards in the transverse direction of the vehicle than the plate elements 80 Therefore, a water droplet that travels along the upper surface of the raised section 47C or the upper surface of the plate element 80 transported and onto the upper surface of the lower frame 26 it drained away through this through hole 26A from the battery frame 20discharged to the outside.

[0056] Furthermore, as is stated in Fig. 1 and Fig. Figure 2 shows the sections that are further out in the transverse direction of the vehicle than the cantilever sections. 47B are arranged, of the lower main body sections 47 of the lower, deformable element 46 than the side wall sections 47D formed which are essentially perpendicular to the top of the vehicle body, in order to extend along the side wall sections 29 of the lower frame 26 to run. Furthermore, these side wall sections have 47D essentially the same height as the side wall sections 29 , which are the inner sections of the lower frame in the transverse direction of the vehicle 26 are.

[0057] In particular, the side wall sections extend 29 of the lower frame 26to the top of the vehicle body up to a height position that essentially defines the boundary sections 49 between the side wall sections 47D and the lower flange sections 48 of the lower main body section 47 achieved. Furthermore, the lower flange sections form 48 , which are located on the frontal surface sections 38 of the inner frame 30 and the upper end sections on the side wall sections 29 of the lower frame 26 (of the battery frame) 20 ) project outwards in the transverse direction of the vehicle, a single and continuous continuation of the inner sections of the side wall sections in the transverse direction of the vehicle 47D .

[0058] Furthermore, the upper flange sections 44 and the lower flange sections 48 , which are from the battery frame 20protrude outwards in the transverse direction of the vehicle, overlap each other and are joined together by an adhesive (or rivet or the like) to form flange sections. 50 , the areas that are attached to the lower elements 14 (the side of the lower surface of the base plate 12 ), on the side of the battery frame 20 are fixed. It should be noted that the deformable element 40 (the upper, deformable elements) 42 and the lower, deformable element 46 ) is made of metal and is made, for example, of high tensile strength steel plates or of very high tensile strength steel plates.

[0059] Furthermore, as is stated in Fig. As shown in Figure 1, there are several through holes. 50A , which communicate with each other and are used to insert the flange bolts 58 are provided for in the longitudinal direction of the vehicle body in the flange section 50, which passes through the upper flange section 44 and the lower flange section 48 is formed, trained. Therefore, the battery frame is 20 because the flange bolts 58 from the underside of the vehicle body into the through holes 50A and the through holes 14A inserted and secured with the weld nuts 52 are screwed down, via the deformable element 40 (the flange sections 50 ) on the lower elements 14 fastened and secured.

[0060] Furthermore, as is stated in Fig. 1 and Fig. As shown in section 2, inclined sections 44A , which extend from the outer top in the transverse direction of the vehicle to the inner bottom in the transverse direction (in the direction of boundary sections) 45 between the upper main body sections 43 and the upper flange sections 44) extend to the sides of the upper main body section 43 the upper flange sections 44 and further outwards in the transverse direction of the vehicle than the battery frame 20 formed. Through the formation of these inclined sections 44A This results in a structure in which the border sections 45 Joints of the bending deformation, which is described below, of the flange sections 50 become.

[0061] It should be noted that inclined sections 48A , which extend from the outer top in the transverse direction of the vehicle to the inner bottom in the transverse direction of the vehicle (in the direction of the boundary sections) 49 between the lower main body section 47 and the lower flange sections 48 ) extend, also to the sides of the lower main body section 47 the lower flange sections 48 are formed that extend over the upper flange sections 44and further outwards in the transverse direction of the vehicle than the battery frame 20 are located. This results in a structure in which the border sections 49 together with the border sections 45 to pivot joints of the bending deformation of the flange sections 50 become.

[0062] Furthermore, as is stated in Fig. As shown in Figure 1, the inner sections of the floor plate in the transverse direction of the vehicle 12 as bending sections 12A formed, which are bent towards the top of the vehicle body, and these bent sections 12A are joined to inner sheets by welding or similar processes 62 of sills 60 connected, which are made of metal. The sill 60 includes the inner sheet metal 62 , which in cross-section essentially has the shape of a hat, and an outer sheet 64 , which in cross-section essentially has the shape of a hat.

[0063] In particular, the sill has 60 through an upper flange section 64A of the outer sheet metal 64 , which is joined to an upper flange section by welding or the like 62A of the inner sheet metal 62 is connected, and a lower flange section 64B of the outer sheet metal 64 , which is joined to a lower flange section by welding or the like 62B of the inner sheet metal 62 connected, a rectangular, closed cross-sectional shape.

[0064] Furthermore, energy absorption elements 70 , which are made of metal, between the undersides of the vehicle body and the sills 60 (including the two end sections in the transverse direction of the vehicle on the base plate) 12 ) and the battery frame 20 arranged. The energy absorption element 70 includes the inner element 72, which is located inside the vehicle in the transverse direction, next to the side wall section 29 is arranged, and an outer element 76 , which is further out in the transverse direction of the vehicle than the inner element 72 and with a predetermined distance between them (a distance large enough that the lower flange sections 62B , 64B (can be introduced therein) is arranged.

[0065] The inner element 72 It comprises several (e.g., seven) block sections, which are essentially rectangular (tubular) in cross-section, extend in the longitudinal direction of the vehicle body, and are joined together in one piece. A side wall section 73A of the block section 73 , which points inwards in the transverse direction of the vehicle and is located furthest inwards in the transverse direction of the vehicle, is next to the side wall section 29arranged (so that it maintains a small distance in the transverse direction of the vehicle to the side wall section) 29 has).

[0066] Furthermore, the block section 73 by screws and weld nut (not shown) on the lower element 14 fastened and fixed, but not where the fastening areas of the flange section are located. 50 are located. A block section 74 , which is located furthe outermost in the transverse direction of the vehicle and on the upper section, is secured by screws 66 and weld nuts 68 on the inner sheet metal 62 of the sill 60 fastened and fixed. As a result, the internal elements are 72 on the underside of the vehicle body of the two end sections of the base plate 12 arranged.

[0067] The outer element 76It comprises several (e.g., five) block sections, which are essentially rectangular (tubular) in cross-section, extend in the longitudinal direction of the vehicle body, and are joined together in one piece. A block section 79 , which is located on the outer side in the transverse direction of the vehicle and on the upper section, is secured by the screws 66 and the weld nuts 68 on the outer sheet metal 64 of the sill 60 fastened and fixed. As a result, the outer element is 76 on the underside of the sill of the vehicle body 60 arranged.

[0068] Furthermore, a convex section 75A , which protrudes outwards in the transverse direction of the vehicle, at a block section 75 , which is located furthest out in the transverse direction of the vehicle and on the lower section of the inner element 72 is located, formed. Furthermore, a concave section is present. 77A, which is concave outwards in the transverse direction of the vehicle, at the boundary section between a block section 77 and a block section 78 , which are located inside the vehicle in the transverse direction and on the lower section of the inner element 76 are arranged, formed to create the convex section 75A to allow (so that the convex section 75A (is not touched).

[0069] This concave section 77A and the convex section 75A are aligned with each other (touching each other) when the outer element 76 due to a side collision of the vehicle to the inner element 72 moves, and can effectively take part of the inner element 76 on the inner element 72 transferred collision load. In particular, a structure results in which the outer element 76 and the inner element 72form a unit and can be plastically deformed (compressed) inwards in the transverse direction of the vehicle.

[0070] The following describes how the vehicle battery mounting structure works. 10 with the structure described above. In particular, the functionality is described for the case where the side of the vehicle collides with a post or mast (an obstacle) that is, for example, made of metal, is solid cylindrical (or hollow cylindrical) and extends vertically, as shown in Fig. 4.

[0071] As it is in Fig. As shown in Figure 4, when the side of the vehicle collides with a post or mast P, an excessive collision load, directed inwards in the transverse direction of the vehicle, acts on the sill. 60 and the energy absorption element 70 One. If a collision load acts from the outside in the transverse direction of the vehicle, the sill moves.60 , deforming plastically inwards in the transverse direction of the vehicle, absorbs part of this impacting collision load and transfers part of the remaining collision load to the floor plate 12 .

[0072] If part of the collision load is transferred to the base plate 12 When the load is transferred, the outer end section of this floor plate, in the transverse direction of the vehicle, shifts. 12 upwards, and the outer end section of the lower element in the transverse direction of the vehicle. 14 , which is on the lower surface of the base plate 12 Once fixed, it is moved towards the top of the vehicle body. This results in a bending moment M, directed in the longitudinal direction of the vehicle body, acting on the flange section. 50 of the deformable element 40 , which is attached to this lower element 14 is attached and fixed, one.

[0073] In particular, a force is applied which causes the flange section to move 50 with the border section 45 between the upper main body section 43 and the upper flange section 44 bends upwards as a joint (i.e., so that the outer end section of the flange section in the transverse direction of the vehicle) 50 (moved towards the top of the vehicle body), onto the flange section 50 (the upper flange section) 44 and the lower flange section 48 ) of the deformable element 40 , which is attached to the lower element 14 is fastened and fixed, exercised.

[0074] Here is the flange section 50 (the deformable element 40 ) deformable because it is formed from metal (a high-tensile-strength steel plate or a very high-tensile-strength steel plate). Furthermore, the inclined sections 44A , 48A, extending from the outer top in the transverse direction of the vehicle to the inner bottom in the transverse direction of the vehicle, on the side of the upper main body section 43 of the upper flange section 44 and the side of the lower main body section 47 of the lower flange section 48 , which includes the flange section 50 form, and further outwards in the transverse direction of the vehicle than the battery frame 20 educated.

[0075] Therefore, the flange section can 50 easily bendable towards the top of the vehicle body, whereby the boundary sections 45 , 49 form the joint. Consequently, the bending moment M acting on the flange section 50 acts through the bending deformation of the flange section 50 effectively absorbed to the upper surface of the vehicle body, and a transfer of this to the battery frame 20is reduced or prevented. In particular, in the event of a side collision of the vehicle, the load exerted on the lower element can be reduced. 14 above the flange section 50 on the battery frame 20 is exerted, reduced or eliminated.

[0076] Furthermore, there are, since the flange section 50 is deformable, no concerns regarding the flange section 50 simply by the fact that the flange section 50 When bent towards the top of the vehicle body, it breaks (a break in the flange section). 50 is prevented or prevented). Therefore, there are no concerns that the battery frame 20 from the lower element 14 will solve, and there are no concerns that the fuel cell stack 16 will give way from the vehicle.

[0077] However, if the collision load acts from the outside in the transverse direction of the vehicle, the energy absorption element moves. 70 (the outer element 76 and the inner element 72 ), deforming plastically inwards in the transverse direction of the vehicle, absorbs part of this impacting collision load and transfers part of the remaining collision load to the lower element. 14 and the battery frame 20 .

[0078] The following is in Fig. The 7 shown comparative example is described. In a vehicle battery mounting structure. 100 According to the comparative example, the inclined wall 28 not at the outer end section of a lower frame in the transverse direction of the vehicle 126 formed. In particular, only one side wall section is formed. 129 , which extends essentially vertically upwards, at the outer end section of a floor plate in the transverse direction of the vehicle127 educated.

[0079] Furthermore, a cantilevered section protrudes. 147B on a lower main body section 147 a lower, deformable element 146 horizontally inwards in the transverse direction of the vehicle and is flush with the upper surface of the floor plate 127 connected. A side wall section 147D on the lower main body section 147 extends essentially vertically upwards and is aligned with the inner surface of the side wall section 129 tied together.

[0080] Consequently, there are cases where the side of the vehicle collides with the post or pole, in which, as described in Fig. 7A shows a block section 173 on an internal element 172 an energy absorption element 170 , which was plastically deformed, against the side wall section 129 of the lower frame 126strikes, rotating due to the bending moment M and thereby this side wall section 129 on the side of the upper end section of this, it presses inwards in the transverse direction of the vehicle.

[0081] In this case, the side wall section deforms 129 and the side wall section 147D so that they give way inwards in the transverse direction of the vehicle, and there are concerns that a section of the floor plate 127 , which is located further inwards in the transverse direction of the vehicle than the inner end section of the cantilever section in the transverse direction of the vehicle 147B is located, will break. In particular, there are concerns that the bending moment N, which is directed upwards (out of the plane), will break at a section of the base plate. 127 is generated where the cantilever section is located. 147B not located and where the yield strength suddenly changes, and that the battery frame120 will suddenly break through across.

[0082] Furthermore, if in the vehicle battery mounting structure 100 According to the comparative example, a water droplet in a projection section 134 is present, as it is in Fig. Figure 7B shows the state in which the water droplet is particularly at a lower edge line section. 147Bd at the inner end section of the cantilever section in the transverse direction of the vehicle 147B It adheres and is maintained. Therefore, there are concerns that rust may develop through galvanic corrosion on this underside edge section. 147Bd This will occur. Consequently, it will be incorporated into the vehicle battery mounting structure. 100 According to the comparative example, a countermeasure such as applying a sealant to the inner end section of the cantilever section in the transverse direction of the vehicle. 147B or something similar is needed.

[0083] In contrast, the vehicle battery mounting structure 10 according to the present embodiment, as it is in Fig. As shown in section 4, the inclined wall 28 , which is inclined from the vehicle transverse direction inside bottom to the vehicle transverse direction outside top (from the vehicle transverse direction outside top to the vehicle transverse direction inside bottom), on the outside in the vehicle transverse direction of the lower frame 26 of the battery frame 20 formed, and the side wall section 29 , which extends essentially vertically upwards, is located at the outer end section of this inclined wall in the transverse direction of the vehicle. 28 educated.

[0084] Furthermore, the cantilever section is also 47B of the lower main body section 47 at the same angle as this inclined wall 28 inclined, and the side wall section 47D, which extends essentially vertically upwards, is located at the outer end section of the cantilever section in the transverse direction of the vehicle. 47B formed. In particular, the cantilever section 47B with the upper surface of the inclined wall 28 connected and the side wall section 47D with the inner surface of the side wall section 29 tied together.

[0085] Therefore, even if the block section 73 on the inner element 72 of the energy absorption element 70 , which has deformed plastically, against the side wall section 29 of the lower frame 26 As it rotates due to the torque M, this collision load (shown by arrow F in Fig. 4) effective in the transverse direction of the vehicle inwards in the direction of the plane (the compression direction) of the inclined wall 28 (of the lower frame) 26) and the cantilever section 47B (of the lower main body section) 47 ) transferred. Therefore, a yielding of the side wall section can occur. 29 in the transverse direction of the vehicle, inwards, are reduced or prevented.

[0086] As a result, part of the collision load acting on the vehicle in a side collision and directed inwards in the transverse direction of the vehicle (shown by arrow F) can be effectively absorbed by the side wall section. 29 and the side wall section 47D to the final surface section 38 of the inner frame 30 , i.e., the multiple rows of convex sections 33 transferred and also through the base plate 27 be absorbed.

[0087] Furthermore, there are high-level sections. 47C , extending inwards in the transverse direction of the vehicle from the inclined wall 28 lift off, at sections of the cantilever section47B formed, and the adhesive G, which joins the raised sections 47C with the sloping wall 28 The wall, which serves as a barrier, becomes thicker towards the inside in the transverse direction of the vehicle. Therefore, a portion of the collision load, which is absorbed by the inclined wall, can be absorbed by the wall. 28 and the cantilever section 47B is transferred, is absorbed by the adhesive G, while a sudden change in yield strength occurs due to the disappearance of the cantilever section. 47B This is prevented. Consequently, the collision load that affects the base plate can be reduced. 27 is transferred, reduced, and a breakthrough of the battery frame 20 (Breaking the base plate 27 ) can be reduced or prevented as much as possible.

[0088] Furthermore, there are high-level sections. 47Cinclined from the outer top in the transverse direction of the vehicle to the inner bottom in the transverse direction with respect to the horizontal direction, and the lower edge line sections 47Cd The inner end sections of the vehicle, in the transverse direction, are located at a distance from the inclined wall. 28 , which corresponds to the maximum thickness H of the adhesive G. Therefore, even if a water droplet is in the protruding section, it will still run. 34 This water droplet is located on the upper surface of the raised section. 47C off, and the water droplet cannot easily adhere to the upper surface of the raised section. 47C and the lower edge line section 47Cd liable (see Fig. 3) Consequently, a [something] forms on the upper surface of the raised section. 47C and the lower edge line section 47Cd Minimal rust due to galvanic corrosion.

[0089] In particular, the vehicle battery mounting structure 10 According to the present embodiment, a countermeasure such as applying a sealant to the inner end sections of the raised sections in the transverse direction of the vehicle. 47C or the like are not necessary. It should be noted that the adhesive G is applied to the inner end sections of the raised sections in the transverse direction of the vehicle. 47C can bulge out and the inner end sections in the transverse direction of the vehicle (especially the underside edge line sections) 47Cd ) the high-lying sections 47C may be covered by this adhesive G, which is bulging and swollen (see Fig. 5, Fig. 6) As a result, the formation of rust caused by galvanic corrosion, especially on the lower edge sections, can occur. 47Cd the high-lying sections 47Cfurther reduced or prevented.

[0090] Furthermore, the plate elements 80 , which are located at the inner end sections of the raised sections in the transverse direction of the vehicle 47C protrude inwards in the transverse direction of the vehicle, on the upper surfaces of the raised sections 47C arranged. Therefore, some of the hump of the adhesive G, which extends from the inner end section of the raised section in the transverse direction of the vehicle, can be seen. 47C has protruded through this plate element 80 be kept at the bottom. In particular, even within a closed cross-sectional shape where it is difficult to spread or smooth the adhesive G after adhesion and to create a path for water droplets, a path for water droplets can be formed.

[0091] Even if a water droplet is located within the ledge section 34Since the water droplet is located on the upper surface of the raised section, it therefore runs off. 47C and the upper surface of the plate element 80 to the upper surface of the lower frame 26 off and is passed through the through hole 26A from the battery frame 20 , which is in the lower frame 26 The rust that has formed is carried away. Consequently, rust can form through galvanic corrosion on the upper surface of the raised section. 47C further reduced or prevented.

[0092] It should be noted that it is also conceivable to have a through hole that extends through the upright section. 47C and the sloping wall 28 to extend, to form, and to design this through-hole as a drainage hole. However, in this case, when connecting the upright sections... 47C with the sloping wall 28Insulating washers (not shown) are required due to the adhesive G to prevent it from clogging the drain holes, and labor is required to scrape out the adhesive G that is clogging the drain holes. Furthermore, there are concerns that galvanic corrosion may occur at the edges of the through holes (drain holes) located in the raised sections. 47C Rust can form.

[0093] Therefore, it is desirable not to form a through-hole (drainage hole) that extends through the upright section. 47C and the sloping wall 28 extends. If such drainage holes are not formed, steps such as scraping out the adhesive G that blocks the drainage holes and the like can be made unnecessary, thus simplifying the processing of the battery frame. 20This may be improved. Furthermore, the occurrence of a problem such as rust due to galvanic corrosion originating from outside the battery frame may be improved. 20 Visible deterioration of appearance can be prevented.

[0094] Furthermore, the cantilever section 47B on the lower main body section 47 of the lower, deformable element 46 through the inner frame 30 (the main body section 32 ) and the lower frame 26 (the base plate 27 ) are clamped and fixed. Consequently, in a side collision of the vehicle, even if the flange section is... 50 bends towards the top of the vehicle body, causing the cantilever section to loosen. 47B of the lower main body section 47 from the inner frame 30 and the lower frame 26 reduces or prevents.

[0095] It should be noted that, as it is in Fig. 4 is shown when the flange section 50 deformed towards the top of the vehicle body, a force directed towards the top of the vehicle body, on the outer end section of the upper flange section in the transverse direction of the vehicle. 44 exerted, and therefore a force acting towards the side of the inclined wall 24 is directed (pressing downwards) towards the upper main body section 43 exerted. In particular, it is difficult to apply a force in a direction that causes detachment from the inclined wall. 24 on the upper main body section 43 is exerted, so that this release from the inclined wall 24 can be reduced or prevented

[0096] Furthermore, a concave section (not shown), which is essentially “U”-shaped (the boundary section) 45(is, viewed in cross-section, essentially circular) or, viewed from the longitudinal direction of the vehicle body, is essentially “V”-shaped, on the side of the upper main body section 43 of the upper flange section 44 , further out in the transverse direction of the vehicle than the battery frame 20 be formed, i.e., in the border section 45 between the upper main body section 43 and the upper flange section 44 .

[0097] Accordingly, the outer end section of the flange section in the transverse direction of the vehicle can 50 even more easily bend towards the top of the vehicle body if the boundary section 45 between the upper main body section 43 and the upper flange section 44 , i.e., the concave section that forms the joint. Therefore, the load exerted by the lower element can 14 over the flange section 50on the battery frame 20 Its effects can be further reduced or eliminated.

[0098] Although the above vehicle battery mounting structure 10 As described in the present embodiment with reference to the drawings, the vehicle battery mounting structure is 10 According to the present embodiment, it is not limited to the structure shown, but can be constructively modified in a suitable manner within the scope of protection, which does not deviate from the essence of the present invention. For example, the deformable element 40 not limited to an element formed from a steel plate with high tensile strength or a steel plate with very high tensile strength, but may be formed from an aluminum alloy or an iron alloy or the like, which possesses a certain hardness.

[0099] Furthermore, the flange sections 50of the deformable element 40 not limited to structures attached to the lower elements 14 are attached and fixed, which are connected to the lower surface of the base plate 12 are connected and fixed to it. The flange sections 50 These could be, for example, structures that are fastened and fixed by supports or the like (not shown), which are connected to the lower surface of the base plate. 12 or the lower surfaces of the lower elements 14 are connected and fixed to it. In particular, the flange sections can 50 of the deformable element 40 These are structures that are indirectly related to the base plate. 12 or the lower elements 14 are connected.

[0100] Furthermore, the upper main body section 43 and the lower main body section 47 of the deformable element 40not limited to sections bonded to the battery frame by an adhesive 20 are not connected, but can, for example, be structures connected by a connecting device such as rivets or the like. Furthermore, the battery frame 20 in the present embodiment not limited to a frame that supports the fuel battery stack 16 supports.

Claims

[1] Vehicle battery mounting structure with: a lower battery frame element, wherein the lower battery frame element is made of resin, wherein the lower battery frame element is arranged on inner sides of energy absorption elements on an underside of a floor plate in a transverse direction of the vehicle, and wherein the lower battery frame element, together with an upper battery frame element, forms a battery frame and the battery frame element supports a battery; a lower, deformable element that includes: a lower main body section, wherein the lower main body section is connected to inner sections of the lower battery frame element in the transverse direction of the vehicle, and lower flange sections, wherein the lower flange sections are fixed on one side of a lower surface of the lower plate; and inclined walls, wherein the inclined walls are formed at the outer end sections of the lower battery frame element in the transverse direction of the vehicle, and wherein the inclined walls are inclined from the outer top in the transverse direction of the vehicle to the inner bottom in the transverse direction of the vehicle. [2] Vehicle battery mounting structure according to claim 1, wherein sections of the lower main body sections are designed as raised sections, the raised sections gradually moving away from the inclined walls from the outside in the transverse direction of the vehicle to the inside in the transverse direction of the vehicle, and areas between the inclined walls and the raised sections are filled with an adhesive and thereby bonded. [3] Vehicle battery mounting structure according to claim 2, wherein plate elements are arranged on the raised sections, the plate elements projecting inwards from the inner end sections of the raised sections in the transverse direction of the vehicle. [4] Vehicle battery mounting structure according to one of claims 1 to 3, wherein vertical walls extending upwards are formed at the inner end sections of the inclined walls in the transverse direction of the vehicle. [5] Vehicle battery mounting structure according to any one of claims 1 to 4, further comprising an upper deformable element with an upper main body section and upper flange sections, wherein the upper main body section is connected to end sections of the upper battery frame element that are outer in the transverse direction of the vehicle, and wherein the upper flange sections, together with the lower flange sections, are fixed on the side of the lower surface of the lower plate, wherein inclined sections are formed on the sides of the upper main body section of the upper flange sections, and wherein the inclined sections are inclined from the outer top in the transverse direction of the vehicle to the inner bottom in the transverse direction of the vehicle.

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