JP4494333B2 - Fuel cell vehicle - Google Patents

Description

  The present invention relates to a fuel cell vehicle.

In a fuel cell vehicle, a fuel cell stack is formed by stacking a plurality of fuel cells, and the fuel cell stack is mounted below a floor panel or the like. As a fuel cell vehicle of this type, a fuel cell stack is attached to a subframe, and the subframe is coupled to a vehicle body frame member such as a vehicle side frame from the lower side of the vehicle body (for example, Patent Document 1). Etc.).
JP 2003-182624 A

  However, in the case of this conventional fuel cell vehicle, since the fuel cell stack is arranged over a wide range in the vehicle width direction on the lower surface side of the floor panel, the height of the entire floor panel is increased and the seating space for the passenger is reduced. It causes problems such as pressure.

  In addition, in this type of fuel cell vehicle, stacking of fuel cells in the longitudinal direction of the vehicle body has also been studied, but in this case, load input from the side of the vehicle perpendicular to the stacking direction of the fuel cell stack is considered. On the other hand, it is a problem to reliably protect the fuel cell stack.

  Accordingly, the present invention provides a fuel cell that can reliably protect the fuel cell stack against load input from the outside without impairing the comfort of the passenger compartment by raising the overall height of the floor panel or pressing the seating space in the passenger compartment. It is intended to provide a car.

As means for solving the above problems, the invention according to claim 1 is directed to a fuel cell stack (for example, a fuel cell stack 12 in an embodiment described later) having a subframe (for example, a subframe 40 in an embodiment described later). ) Through a vehicle floor panel (for example, a floor panel 1 in an embodiment described later), the floor panel is placed at a substantially central position in the vehicle width direction between the left and right front seats of the vehicle. A center console (for example, a center console 23 in an embodiment described later) formed by bulging upward and a pair of left and right that are disposed along the vehicle longitudinal direction at a substantially central position in the vehicle width direction and support the center console. provided the center frame (e.g., center frame 27 will be described in the exemplary embodiment), the Centers frame right and left pair of side frames disposed along the longitudinal direction of the vehicle in the vehicle width direction outer side position than (e.g., side frame 2 will be described in the exemplary embodiment) is provided, a fuel cell stack mounted on said subframe the The sub frame is connected to the center frame and the side frame so as to be accommodated inside the center console .

  As a result, the fuel cell stack is arranged along the vehicle body front-rear direction inside the center console that bulges upward between the left and right seats, and the subframe that supports the fuel cell stack is a fuel cell It will be connected to the center frame on both sides of the stack.

According to a second aspect of the present invention, in the first aspect of the present invention, the sub-frame is divided into front and rear sub-cross frames extending in the vehicle width direction (for example, a sub-cross frame in an embodiment described later). 41, 42), and left and right vehicle body left and right sub-center frames (for example, a sub-center frame 44 in an embodiment described later), and these sub-cross frames and sub-centers. The fuel cell stack is attached to a region surrounded by the frame.
As a result, the fuel cell stack is supported by a strong skeleton that is assembled in a square shape by the front and rear sub-cross frames and the left and right sub-center frames.

According to a third aspect of the present invention, in the second aspect of the present invention, the subframe is coupled to the center frame at each intersection of the subcenter frame and the subcross frame.
As a result, the center frames are reinforced by the sub center frames, and the left and right center frames are reinforced by the sub cross frames.

The invention according to claim 4, Oite to the invention of claim 2 or 3, with extend across between said respective sub-cross frame of the right and left side frames, the end portions of the respective sub-cross frame Are connected to the left and right side frames.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the sub-center frame is extended from a coupling point with the sub-cross frame, and an end portion of the sub-cross frame coupled to the side frame side is provided. In addition, an inclined frame (for example, a gusset pipe 46 in an embodiment described later) for connecting the sub-center frame to the extension from the connection point is provided.
As a result, when an external weight is input from the side of the side frame, the weight is transmitted to the coupling point with the sub cross frame on the sub center frame via the sub cross frame, and the sub weight is transmitted via the inclined frame. It is also transmitted to the extension part of the center frame.

The invention described in claim 6 is the invention according to any one of claims 1 to 5, a bracket for mounting the fuel cell stack to the subframe provided, the bracket of the right and left and the sub-frame The sub-frames are respectively coupled to the left and right center frames so as to be sandwiched between the center frames.
Thereby, the bracket for attaching the fuel cell stack functions as a reinforcing member for connecting the left and right center frames to each other.

  According to the present invention, since the fuel cell stack is disposed between the left and right front seats along the vehicle longitudinal direction inside the center console, at least a part of the fuel cell stack is positioned on the upper side of the floor level. The fuel cell stack can be advantageously protected against load input from the vehicle, and the living space and the fuel cell stack can be separated by the center console. Further, since the height of the floor panel can be prevented from rising and the seating space in the passenger compartment can be pressed, the comfort in the passenger compartment is not impaired. In addition, since the subframe that supports the fuel cell stack extends in the longitudinal direction of the vehicle body and is coupled to the center frame that supports the center console, the fuel cell stack can be reliably protected against external load input.

Furthermore, according to the present invention, since the sub-frame on which the fuel cell stack is mounted is connected to both the center frame and the side frame along the vehicle front-rear direction, the fuel cell stack particularly with respect to load input from the side of the vehicle body Can be reliably protected.

According to the second aspect of the present invention, since the fuel cell stack is supported by the strong skeleton formed in a square shape by the front and rear sub-cross frames and the left and right sub-center frames, the support rigidity of the fuel cell stack In addition, the fuel cell stack can be more reliably protected against externally applied load.

According to the third aspect of the invention, since the sub frame is coupled to the center frame at each intersection of the sub center frame and the sub cross frame, the rigidity of the center frame can be efficiently increased by the sub frame.

According to the fourth aspect of the present invention, since the sub-cross frame that supports the fuel cell stack together with the sub-center frame is connected to both the center frame and the side frame, the fuel cell is applied to the weighted input from the side of the vehicle body. The stack can be protected more reliably.

According to the fifth aspect of the present invention, the external weight input to the side frame from the side of the vehicle body is distributed and transmitted to the parts spaced apart in the longitudinal direction of the center frame via the sub-cross frame and the inclined frame. Therefore, the strength of the center frame with respect to the input load from the side of the vehicle body can be increased without increasing the size of the cross section of the center frame. Therefore, in the present invention, an increase in the cross-sectional area and weight of the center frame can be suppressed, so that it is possible to improve the degree of freedom of component placement and reduce the weight of the vehicle.

According to the sixth aspect of the present invention, the mounting rigidity of the bracket can be reliably increased by sandwiching the bracket between the subframe and the center frame, and the bracket functions as a reinforcing member for connecting the left and right center frames to each other. Therefore, the rigidity of the left and right center frames can be efficiently increased without causing an increase in the number of parts or an increase in weight.

Next, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 4, the fuel cell vehicle is provided with a pair of left and right side frames 2 that form a vehicle body skeleton member below the floor panel 1 from the front of the vehicle body to the rear of the vehicle body. The left and right side frames 2 are disposed along the longitudinal direction of the vehicle body, and side sills 5 are joined to the outer walls 3 of the side frames 2 via the outriggers 4. The rear end portion of the side sill 5 is connected to the rear portion of the side frame 2 via an extension 6. Cross members 7, 8, 9 that are vehicle body skeleton members are connected to the side frame 2 in the vehicle width direction.

A front subframe 11 is provided in the motor room 10 at the front of the vehicle body, and a pump motor unit 15 including a compressor 13 for supplying air to the fuel cell stack 12 and a driving motor 14 for traveling is disposed.
A rear subframe 16 integrally provided with a wheel and a suspension (not shown) from the lower side is attached to the side frame 2 at the rear of the vehicle body. A hydrogen tank that stores hydrogen as fuel of the fuel cell stack 12 is attached to the rear subframe 16. 17 and a storage battery 18 are attached.
The floor panel 1 is joined to a portion on the side frame 2 configured as described above and extending between the side sills 5 and 5. The front end portion of the floor panel 1 rises to the front and continues to the dash lower 1a, and the rear end portion of the floor panel 1 extends to a position covering the upper portion of the hydrogen tank 17 of the rear subframe 16.

  A front seat 20 and a rear seat 21 are disposed on the floor panel 1, and a center console 23 that extends from the lower end of the dash lower 1 a to the vicinity of the rear seat 21 swells above the vehicle interior between the left and right front seats 20. The floor panel 1 is formed so as to protrude.

  As shown in FIG. 4, a reinforcement 26 is joined from the lower surface side to the rising portion 24 on the root side of the left and right side walls 25 of the center console 23 so as to form a substantially triangular cross section. The lower end of the side wall 25 is reinforced. On the other hand, a pair of left and right center frames 27 having a closed cross-sectional structure are provided so as to extend in the longitudinal direction of the vehicle body at a substantially central position in the vehicle body width direction. A lower end of each side wall 25 of the center console 23 is disposed above the center frame 27, and the center console 23 is supported by coupling the reinforcement 26 to the upper surface of each center frame 27.

  In addition, a closed cross-sectional structure along the longitudinal direction of the vehicle body is formed at the inner corners of the left and right side frames 2 positioned on the outer side in the vehicle width direction of the center frames 27 on both sides and the floor panel 1 connected to the upper surface thereof. The reinforcing frame 28 to be formed is joined. A reinforcing frame 28 integrated with the left and right side frames 2 and a lower frame 40 (described later) are coupled to the lower surface of each center frame 27, and the fuel cell stack 12 mounted on the sub frame 40 is complemented. The machine 19 is arranged in the center console 23.

  As shown in FIG. 5, the sub-frame 40 includes a front sub-cross frame 41 and a rear sub-cross frame 42 that are arranged at positions corresponding to the outriggers 4 and extend in the vehicle width direction. Between the front and rear sub-cross frames 41 and 42, sub-side frames 43 and 43 that connect the left and right ends of the sub-cross frames 41 and 42 are provided. The sub side frames 43 and 43 are disposed below the reinforcing frame 28 along the inner wall of the side frame 2. In FIG. 5, FR indicates the front side.

Inside each sub-side frame 43, a sub-center frame 44 positioned below the center frame 27 is disposed along the vehicle body longitudinal direction. The front end of each sub-center frame 44 is coupled to the front sub-cross frame 41, the rear edge of each sub-center frame 44 is coupled to the rear sub-cross frame 42, and each sub-center frame 44 is further connected to the rear sub-cross frame. It extends rearward beyond the connection point with the frame 42. The rear end portions of the left and right sub-center frames 44 are connected by end pipes 45 disposed in the vehicle width direction, and the left and right end portions of the end pipe 45 and the left and right end portions of the rear sub-cross frame 42 are disposed obliquely. Are connected by a gusset pipe 46 (inclined pipe). The gusset pipe 46 is arranged so as to release the impact load in a direction away from the fuel cell stack 12 when an impact load is input from the side to the outrigger 4. It is difficult to act on the battery stack 12.
Intermediate pipes 47, 47 are connected between the sub-center frames 44 and the sub-side frames 43 at a predetermined interval on the front side and the rear side.

  An attachment point P with respect to the reinforcing frame 28 on the vehicle body side is set at a connection portion between the sub-side frame 43 on the sub-frame 40 and the front and rear sub-cross frames 41, 42. , 42 is set to an attachment point P for the center frame 27 on the vehicle body side, and an attachment point P for the center frame 27 on the vehicle body side is connected to the connection portion of the end pipe 45, the gusset pipe 46 and the sub center frame 44. Is set. At these ten attachment points P, P,..., The sub-frame 40 is fastened and fixed to the center frame 27 and the reinforcement frame 28 of the vehicle body from below with bolts and nuts, and fits within the vertical width of the side frame 2. It has become. As described above, the subframe 40 is attached to the lower side of the reinforcement frame 28 so as to be within the vertical width dimension of the side frame 2. The floor can be lowered.

  In addition, the fuel cell stack 12 is disposed between the sub-cross frames 41 and 42 before and after the sub-frame 40 so as to fit between the left and right sub-center frames 44. The fuel cell stack 12 is fixed to the subframe 40 via brackets 48 and 49 (see FIGS. 6 and 7) fixed to the subcross frames 41 and 42, respectively. Further, the auxiliary equipment 19 of the fuel cell stack 12 is attached to the end pipe 45 and the rear sub-cross frame 42 so as to be positioned between the sub-center frames 44. Specifically, the auxiliary machines 19 are arranged in the order of oxygen-based auxiliary machines from the lower side, a hydrogen-based auxiliary machine on the oxygen-based auxiliary machine, and an ECU for managing the system of the fuel cell stack 12 on the upper side.

  The sub-frame 40 is configured as described above, and components such as the sub-cross frames 41 and 42 before and after the sub-frame 40, the left and right sub-center frames 44, and the end pipe 45 are connected by bolts, welding, and the like. Are bound by. In particular, when components are coupled by bolt coupling, for example, a coupling portion structure as shown in FIGS. 8 and 9 can be employed.

  FIGS. 8 and 9 show an example of the connecting portion structure of one sub-center frame 44 and the rear sub-cross frame 42. In this connecting portion, a through hole 60 penetrating in the vehicle width direction is formed in the sub center frame 44, and the rear sub cross frame 42 is fitted into the through hole 60, and the crossing portion of both is connected by a bolt 61 and a nut 62. It has a schematic structure. More specifically, as shown in FIG. 9, from the lower surface side of the sub center frame 44, a bolt 61 is inserted in a state where a reinforcing collar 63 reaching the upper wall of the rear sub cross frame 42 is fitted. A nut 62 is tightened from the upper surface side of the center frame 27 in a state where the front end portion is penetrated to the upper wall of the rear sub-cross frame 42 and the sub-center frame 44 and further to the center frame 27 on the vehicle body side. In this structure, the rear sub-cross frame 42 and the sub-center frame 44 are coupled by the bolt 61 and the nut 62, and the frames 42 and 44 are fitted to each other. Since the center frame 27 is also fastened and fixed at the same time, the number of assembling steps can be reduced.

  By the way, the fuel cell stack 12 is formed by stacking a plurality of substantially rectangular fuel cell cells (hereinafter referred to as “single cells”) into an integrated block shape, and includes a front end portion that is an end portion in the stacking direction. As shown in FIGS. 6 and 7, metal end plates 12FE and 12RE are attached to the rear end portion, and the single cells stacked by the end plates 12FE and 12RE are sandwiched and fixed. The fuel cell stack 12 configured in this way is fixed to the sub-cross frames 41 and 42 via the brackets 48 and 49 as described above. At this time, the stack 12 has a long side of a substantially rectangular shape formed by a single cell. It is mounted on the subframe 40 so as to face the direction. Accordingly, the fuel cell stack 12 has a vertically long cross section, and can be accommodated in the narrow cross section of the center console 23 in a state where the subframe 40 is attached to the lower surface of the vehicle body as described above. It has become.

  The front end plate 12FE is provided with cooling water supply / discharge passages 30a and 30b as shown in FIG. 6, and the rear end plate 12RE is supplied with a hydrogen-based supply as shown in FIG. The exhaust ports 31a and 31b (one is connected to the above-described hydrogen tank 17) and the oxygen-based supply / discharge ports 32a and 32b (one is connected to the above-described compressor 13) are diagonally positioned. Is provided.

  Here, the fuel cell system mounted on this vehicle will be briefly described. In this fuel cell, as shown in FIG. 10, hydrogen and oxygen (compressed by the compressor 13) are provided from the rear side of the fuel cell other stack 12. When the introduced hydrogen and oxygen are supplied to the anode and cathode in each cell, power generation is performed by the reaction of both gases. Further, cooling water is circulated and supplied from the front side of the fuel cell and other stacks 12 so that the heat generated during the reaction of the gas is cooled by the cooling water. The hydrogen supplied to the anode of each cell is used after the unreacted portion is recycled by an ejector (not shown), but the exhaust gas containing residual hydrogen that has not completely reacted here is diluted in a dilution box. It is discharged outside the car.

  Further, as shown in FIG. 5, a DC-DC converter 51 is attached between the intermediate pipes 47 and 47 on the left side of the vehicle body of the subframe 40, and the hydrogen in the hydrogen tank 17 is interposed between the intermediate pipes 47 and 47 on the right side of the vehicle body. A heater 50 that generates heat by combustion or the like is attached. The DC-DC converter 51 is an electrical equipment for adjusting the voltage. The power conversion cable 70 extends along the upper surface of the intermediate pipe 47 and further straddles the opposing surface of the center frame 27 and the sub center frame 44 on the left side of the vehicle body. 27 is wired along the inner side in the vehicle width direction. The heater 50 is for supplying hot water into the fuel cell stack 12 at the time of cold start. The pipe 71 extends along the upper surface of the intermediate pipe 47, and further the center frame 27 and the sub center frame 44 on the right side of the vehicle body. The fuel cell stack 12 is connected across the opposing surface.

  As shown in FIGS. 5 and 11, recesses 72, 73 facing each other are formed on the opposing surfaces of the center frame 27 and the sub-center frame 44 on the right side of the vehicle body, and formed between the recesses 72, 73. A pipe 71 of the heater 50 is inserted through the through hole. Similar recesses 72 and 73 (only the recess 73 on the sub center frame 44 side is shown in FIG. 5) are formed on the opposing surfaces of the center frame 27 and the sub center frame 44 on the left side of the vehicle body. The power conversion cable 70 is inserted in the through hole therebetween. In FIG. 11, G indicates the center of gravity of the fuel cell stack 12.

In the fuel cell vehicle, since the fuel cell stack 12 is housed in the center console 23 that is partially bulged between the left and right front seats 20, as described above, the overall height of the floor panel 1 is reduced. The fuel cell stack 12 can be compactly arranged below the floor panel 1 outside the living space without being suppressed and pressing the seating space in the living space. That is, only the center console 23 part bulges in the living space in order to arrange the fuel cell stack 12, and the center console 23 part has an armrest or the like disposed above the center console 23 part so that the occupant is in the living space. Since this is a part where the bulge does not bother, the occupant is not given a feeling of pressure or discomfort due to the bulge of the center console 23.
In particular, in this fuel cell vehicle, the center of gravity G of the fuel cell stack 12 is positioned above the floor level, so that the fuel cell stack 12 can be protected against load input from the side of the vehicle, and the center console. The living space and the fuel cell stack 12 can be separated by 23.
Furthermore, in this embodiment, since the fuel cell stack 12 is accommodated in the console box 23 so that the cross section is vertically long, the occupied width of the console box 23 in the passenger compartment space is further reduced. It is advantageous to.

  In the case of this fuel cell vehicle, the subframe 40 that supports the fuel cell stack 12 is attached to the left and right side frames 2 and 2 and the center frames 27 and 27 along the longitudinal direction of the vehicle body below the floor panel 1. Therefore, the fuel cell stack 12 can be supported with sufficient strength with respect to the vehicle body skeleton member. In particular, the outer side in the vehicle width direction of the sub frame 40 is coupled to side frames 2 and 2 having a large cross section and advantageous in strength. Therefore, the fuel cell stack 12 can be effectively protected against load input from the side of the vehicle body perpendicular to the stacking direction of the fuel cell stack 12.

  Further, since the subframe 40 can increase the strength in the bending direction of the center frame 27 itself that supports the lower end of the side wall of the center console 23, the deformation of the center console 23 and the displacement with respect to the fuel cell stack 12 when a side load is input. Can be effectively suppressed.

In the case of this embodiment, the fuel cell stack 12 is attached to the inside of a rectangular solid skeleton surrounded by the sub-cross frames 41 and 42 and the left and right sub-center frames 44 and 44. In addition, the fuel cell stack 12 can be more reliably protected against weighted input from the side of the vehicle body.
In this embodiment, the sub-frame 40 is coupled to the center frame 27 at each intersection of the sub-center frame 44 and the sub-cross frames 41 and 42, so that the sub-frames 41 and 42 and the sub-center frames 44 and 44 are used. The rigidity of the center frames 27 and 27 can be efficiently increased by the above-described rectangular skeleton structure. Further, since the sub-cross frames 41 and 42 that support the fuel cell stack 12 are coupled to the center frame 27 on the center side in the vehicle width direction and the side frames 2 and 2 on the outside in the vehicle width direction, weight input from the side of the vehicle body In contrast, the fuel cell stack 12 can be more reliably protected.

  Further, in this embodiment, there are provided gusset pipes 46 that obliquely connect both end portions of the rear sub cross frame 42 of the sub frame 40 and the rear end portions of the sub center frames 44, 44 (both end portions of the end pipe 45). Therefore, the impact load input to the side frame 2 from the side of the vehicle is distributed and transmitted to a plurality of locations separated in the longitudinal direction of the center frame 27 via the sub-cross frames 41 and 42 and the gusset pipe 46. be able to. Therefore, since the strength of the center frame 27 against a lateral load can be increased without causing an increase in the size of the cross section of the center frame 27, the cross section of the center frame 27 can be reduced in size while maintaining a sufficient body strength. The degree of freedom can be improved and the vehicle weight can be reduced. In particular, the gusset pipe 46 obliquely connects the end portion of the rear sub-cross frame 42 and a portion spaced from the mounting position of the fuel cell stack 12 on the sub-center frame 44, and applies a collision load from the side. Since it can escape in the direction away from the fuel cell stack 12, the fuel cell stack 12 can be more advantageously protected.

Next, another embodiment of the present invention shown in FIGS. 12 to 19 will be described.
The basic structure of the fuel cell vehicle of this embodiment is substantially the same as that of the above-described embodiment, but the mounting structure of brackets 148 and 149 for mounting the fuel cell stack 12 to the subframe 140, and the subframe 140 The joint structure of the frame element is different from that of the previous embodiment. In other embodiments described here, the same reference numerals are given to the same portions as those of the above-described embodiments, and a part of overlapping description is omitted.

  The basic configuration of the subframe 140 is substantially the same as that of the above-described embodiment, but brackets 148 and 149 for attaching the fuel cell stack 12 to the subframe 140 are arranged on the side of the subframe 140 as shown in FIGS. The mounting base portion 80 coupled to the upper portion extends over the left and right sub-center frames 144 and 144, and is superposed on the upper surfaces of the sub-cross frames 141 and 142 and partial upper surfaces of the sub-center frames 44 and 44, respectively. ing. Each mounting base portion 80 of the brackets 148, 149 is coupled to the sub-cross frames 141, 142 by a plurality of bolts 81, 82, as shown in FIG. FIG. 13 shows the mounting structure of the bracket 148 on the front sub-cross frame 141 side, and the mounting structure of the bracket 149 on the rear sub-cross frame 142 side is not directly shown, but the bracket 149 on the rear sub-cross frame 142 side is shown. The mounting portion of FIG. 6 has substantially the same structure as the mounting portion of the bracket 148 on the front sub-cross frame 141 side. Therefore, in FIG. 13, the reference numerals are attached in parentheses to the corresponding portions of the mounting portion of the bracket 149 on the rear sub-cross frame 142 side.

  In the sub-frame 140 of this embodiment, each frame element is superposed as will be described later, and the superposed frame elements are appropriately fixed by welding. The left and right sub-center frames 144 and 144 are respectively superimposed on the upper and lower surfaces of the sub-cross frames 141 and 142, and the respective overlapping portions are coupled to the center frame 127, which is a vehicle body frame member, by bolts 82 and nuts 83. It is like that. Thus, when the subframe 140 is coupled to the center frame 127, the end portions of the brackets 148 and 149 are sandwiched between the subframe 140 and the center frame 127 as shown in FIGS. Are fastened together by bolts 82 and nuts 83. The brackets 148 and 149 are respectively coupled to the sub-cross frames 141 and 142 by bolts 81 at the inner side in the width direction than the left and right sub-center frames 127 and 127.

In the case of this embodiment, the frame elements of the subframe 140 are basically joined by welding. FIGS. 16 to 19 show an example of the joint structure of the sub-frame 140. Here, the joint part of the three parts of the sub-side frame 143, the rear sub-cross frame 142, and the gusset pipe 146 and its peripheral part are depicted. It is.
Each of the sub-side frame 143 and the gusset pipe 146 has a basic structure in which the flange portions at both edges of the plate members 143a, 143b and 146a, 146b having a hat-shaped cross section are spot welded to each other. At the joint portion of the pipe 146, the plate materials 146a, 146b of the gusset pipe 146 are superposed on the outer surfaces of the plate materials 143a, 143b of the sub-side frame 143, and the flanges of the four plate materials 143a, 143b, 146a, 146b obtained by superposition are superposed. The parts are spot welded simultaneously. A square-shaped opening 85 is formed at a corner portion on the inner side in the vehicle width direction in the joint portion between the sub-side frame 143 and the gusset pipe 146, and the end portion of the sub-cross frame 142 is inserted into this opening portion. The frame 142 is fixed to the sub-side frame 143 and the gusset pipe 146 by MIG welding. In FIG. 16, s indicates a spot welded portion, and m indicates a MIG welded portion.

  Also in this embodiment, the gusset pipe 146 that diagonally connects both ends of the rear sub-cross frame 142 and the rear ends of the sub-center frames 144 and 144 is provided in the sub-frame 140 as in the above-described embodiment. Therefore, the impact load input from the side of the vehicle can be distributed and supported at a plurality of locations on the center frame 27 spaced apart in the longitudinal direction. Since the transmission load can be dispersed in the direction away from the fuel cell stack 12, the fuel cell stack 12 can be more advantageously protected.

In the fuel cell vehicle of this embodiment, the mounting base portion 80 of the brackets 148 and 149 for mounting the fuel cell stack 12 to the subframe 140 is formed so as to straddle the left and right subcenter frames 144 and 144. In addition, since both ends of the mounting base portion 80 are sandwiched between the center frame 127 and the subframe 140 and are coupled to the center frame 127 with bolts 82 and nuts 82, the brackets 148 and 149 are attached to the vehicle body with high rigidity. In addition, the left and right center frames 127 and 127 can be reinforced by the brackets 148 and 149. Therefore, in this embodiment, the rigidity of the left and right center frames 127 and 127 can be efficiently increased without causing an increase in the number of parts or a significant increase in weight.
The subframe 140 and the brackets 148 and 149 can be formed of the same material, but each of them is formed of a material having different characteristics so that the support strength is provided by an appropriate material according to the role. Also good.

  In addition, this invention is not limited to the said embodiment, A various design change is possible in the range which does not deviate from the summary. For example, in the above embodiment, both ends of the sub-frame 40 in the vehicle width direction are coupled to the side frame 2 via the reinforcing frame 28, but the sub-frame 40 is coupled directly to the side frame 2. Anyway. Further, the specific structure of the subframe 40 is not limited to that of the above-described embodiment, and various aspects can be adopted.

BRIEF DESCRIPTION OF THE DRAWINGS Side explanatory drawing of the vehicle of one Embodiment of this invention. Plane explanatory drawing of the vehicle of the embodiment. The perspective view which looked at the vehicle of the embodiment from the back. Sectional drawing of the floor panel which follows the AA line of FIG. The top view of the sub-frame of one Embodiment of this invention. The perspective view which shows the structure of the front part side of the fuel cell stack of the embodiment. The perspective view which shows the structure of the rear part side of the fuel cell stack of the embodiment. The partially broken perspective view which shows the coupling | bond part structure of the sub-frame of the embodiment. Sectional drawing which follows the BB line of FIG. 1 is a schematic configuration diagram showing a fuel cell system according to an embodiment of the present invention. Sectional drawing which follows the CC line | wire of FIG. The top view of the sub-frame of other embodiment of this invention. The perspective view which shows the structure of the front part side of the fuel cell stack of the embodiment. Sectional drawing which follows the DD line | wire of FIG. Sectional drawing which follows the EE line | wire of FIG. FIG. 12 is an enlarged plan view of a portion F in FIG. The H arrow line view of FIG. Sectional drawing which follows the II line | wire of FIG. Sectional drawing which follows the JJ line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Floor panel 2 ... Side frame 12 ... Fuel cell stack 23 ... Center console 27, 127 ... Center frame 40,140 ... Sub frame 41, 42, 141, 142 ... Sub cross frame 44, 144 ... Sub center frame 46, 146 ... Gusset pipe (inclined pipe)
48, 49, 148, 149 ... Bracket

Claims (6)

In a fuel cell vehicle in which a fuel cell stack is mounted below a vehicle floor panel via a subframe,
A center console formed by bulging upwards between the left and right front seats of the vehicle at a substantially central position in the vehicle width direction;
A pair of left and right center frames that support the center console are provided at a substantially central position in the vehicle width direction along the vehicle longitudinal direction.
A pair of left and right side frames arranged along the vehicle front-rear direction are provided at positions outside the center frame in the vehicle width direction,
A fuel cell vehicle characterized in that the subframe is coupled to the center frame and the side frame so that a fuel cell stack mounted on the subframe is accommodated inside the center console. The sub-frame is configured to include a front-side and rear-side sub-cross frame that extends in the vehicle width direction, and a left-side and right-side sub-center frame that extends in the vehicle front-rear direction, and these sub-crosses The fuel cell vehicle according to claim 1, wherein the fuel cell stack is attached to a region surrounded by a frame and a sub-center frame. The fuel cell vehicle according to claim 2, wherein the sub frame is coupled to the center frame at each intersection of the sub center frame and a sub cross frame. The each sub cross frame extends between the left and right side frames, and both ends of each sub cross frame are connected to the left and right side frames. Fuel cell vehicle. Extending the sub-center frame from the coupling point with the sub-cross frame;
5. The fuel according to claim 4, further comprising an inclined frame that couples an end portion of the sub-cross frame coupled to the side frame side and an extension portion of the sub-center frame from the coupling point. Battery car. A bracket for attaching the fuel cell stack to the subframe is provided, and the subframe is coupled to the left and right center frames so that the bracket is sandwiched between the subframe and the left and right center frames. The fuel cell vehicle according to claim 1, wherein the fuel cell vehicle is a vehicle.

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