Vehicle battery and fuel tank mounting structure

Abstract

To provide a battery and a fuel tank mounting structure of a vehicle which enables improvement of collision performance during a side collision of the vehicle.SOLUTION: A battery and a fuel tank mounting structure of a vehicle of the invention includes: a floor panel forming a part of a floor part of a vehicle body; a pair of skeleton members extending in a vehicle fore and aft direction along left and right side edges as seen in a vehicle width direction of the floor panel; and a battery and a fuel tank which are arranged side-by-side in the vehicle width direction at the vehicle lower side relative to the floor panel and between the pair of skeleton members. The battery is stored in a battery case having a lower case and an upper case. The lower case is fixed to the pair of skeleton members through an impact absorption member in the vehicle width direction and the fuel tank is disposed on the lower case.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a mounting structure for a battery and a fuel tank of a vehicle. [Background technology]

[0002] Patent Document 1 describes a mounting structure for a vehicle battery and fuel tank, in which the battery and fuel tank are fixed to the vehicle floor via a pair of cross member brackets within a pair of side members so that they are in front of and close to the drive shaft. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-148749 Summary of the Invention [Problem to be solved by the invention]

[0004] If the battery and fuel tank are simply arranged side by side in the vehicle width direction, the lower case of the battery case that houses the battery will no longer function as a member that increases the rigidity of the vehicle body, leaving room for improvement in the vehicle's crash performance in the event of a side collision.

[0005] The present invention has been made in consideration of the above-mentioned problems, and its purpose is to provide a mounting structure for a vehicle battery and fuel tank that can improve the collision performance of the vehicle in the event of a side collision. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems and achieve the object, the mounting structure for a vehicle battery and fuel tank of the present invention is a mounting structure for a vehicle battery and fuel tank comprising a floor panel that forms part of the floor portion of the vehicle body, a pair of skeletal members that extend in the fore-and-aft direction of the vehicle along the left and right side edges of the floor panel in the vehicle width direction, and a battery and fuel tank arranged side by side in the vehicle width direction on the lower side of the floor panel and between the pair of skeletal members, wherein the battery is stored in a battery case having a lower case and an upper case, the lower case is fixed to the pair of skeletal members in the vehicle width direction via an impact absorbing member, and the fuel tank is arranged on the lower case.

[0007] As a result, in the event of a side collision of the vehicle, the floor panel is braced on the upper side of the vehicle between a pair of skeletal members, and the lower case is braced on the lower side of the vehicle, thereby improving the collision performance in the event of a side collision of the vehicle.

[0008] In the above, the battery may be disposed closer to the center in the vehicle width direction, and the fuel tank may be disposed closer to the outside in the vehicle width direction.

[0009] This improves the weight balance of the vehicle in the vehicle width direction.

[0010] In the above, a cooler for cooling the battery may be provided in the lower case, and the fuel tank may be disposed on the lower case via a heat insulating member.

[0011] This reduces the heat received by the cooler provided in the lower case from the fuel tank, improving the battery cooling performance of the cooler. [Effects of the Invention]

[0012] The vehicle battery and fuel tank mounting structure of the present invention has the effect of improving the collision performance of the vehicle in the event of a side collision, since the floor panel is braced on the upper side of the vehicle and the lower case is braced on the lower side of the vehicle between a pair of skeletal members in the event of a side collision. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a mounting structure for a battery and a fuel tank according to the first embodiment. [Figure 2] FIG. 2 is a diagram showing a configuration in which a fuel tank is disposed on a lower case with a heat insulating material interposed therebetween. [Figure 3] FIG. 3 is a diagram showing a schematic configuration of a mounting structure for a battery and a fuel tank according to the second embodiment. [Figure 4] FIG. 4 is a diagram showing a configuration in which a fuel tank is disposed on a lower case with a heat insulating material interposed therebetween. DETAILED DESCRIPTION OF THE INVENTION

[0014] (Embodiment 1) A first embodiment (Embodiment 1) of the vehicle battery and fuel tank mounting structure according to the present invention will be described below, although the present invention is not limited to this embodiment.

[0015] FIG. 1 is a diagram showing a schematic configuration of a mounting structure 1 for a battery and a fuel tank of a vehicle according to an embodiment. As shown in FIG. 1, the mounting structure 1 for a battery and a fuel tank of a vehicle (hereinafter simply referred to as the mounting structure 1) has a vehicle body floor portion 4 that defines the floor of the passenger compartment of the vehicle. The floor portion 4 includes a floor panel 41 that forms part of the floor portion 4 and defines the bottom surface of the floor portion 4, and multiple skeletal members that are disposed on the floor panel 41 and extend in the vehicle longitudinal direction or the vehicle transverse direction. The skeletal members include a pair of rockers 5A and 5B that extend in the vehicle longitudinal direction along the left and right side edges of the floor portion 4, and a floor cross member 42 that extends in the vehicle transverse direction to connect the rockers 5A and 5B. EA members 6A and 6B that are impact absorbing members that extend in the vehicle longitudinal direction are disposed at the lower ends of the rockers 5A and 5B. Additionally, below the floor panel 41 and between the lockers 5A and 5B, a battery 23 (battery pack 2) and a fuel tank 3 are arranged side by side in the vehicle width direction.

[0016] The battery 23 is housed in a battery case having a lower case 20 and an upper case 21, and the battery case and the battery 23 form a battery pack 2. The battery 23 is formed, for example, by a battery module in which a plurality of battery cells are arranged in an arrangement direction. The upper case 21 is a case member that covers the battery 23 from above the vehicle. The lower case 20 is a case member that supports the battery 23 from below the vehicle. The lower case 20 is disposed extending in the vehicle width direction so as to connect the EA members 6A, 6B, and is fixed to the rockers 5A, 5B via the EA members 6A, 6B. In the mounting structure 1 according to the first embodiment, the fuel tank 3 is disposed on the lower case 20.

[0017] In the mounting structure 1 according to the first embodiment, during a side collision of the vehicle, the floor panel 41 and the floor cross member 42 brace the vehicle upper side between the rockers 5A and 5B, and the lower case 20 braces the vehicle lower side. Therefore, in the mounting structure 1 according to the first embodiment, in addition to the floor panel 41 and the floor cross member 42, the lower case 20 of the battery pack 2 also functions as a member that increases the rigidity of the vehicle body.

[0018] 1, when a collision load F1 is applied to rocker 5B during a vehicle side collision, a portion of the collision load F1, load F2, is transmitted from rocker 5B to floor panel 41 and floor cross member 42 in the vehicle width direction. Similarly, a portion of the collision load F1, load F3, is transmitted from rocker 5B to lower case 20 in the vehicle width direction via EA material 6B. In this manner, with mounting structure 1 according to embodiment 1, the collision load during a vehicle side collision can be distributed between rocker 5A and rocker 5B to floor panel 41 and floor cross member 42 on the upper side of the vehicle and lower case 20 on the lower side of the vehicle. Therefore, with mounting structure 1 according to embodiment 1, during a vehicle side collision, floor panel 41 and floor cross member 42 brace on the upper side of the vehicle and lower case 20 brace on the lower side of the vehicle between rocker 5A and rocker 5B, thereby improving collision performance during a vehicle side collision and protecting battery 23 (battery pack 2) and fuel tank 3.

[0019] Furthermore, in the mounting structure 1 according to the first embodiment, a cooler 7 for cooling the battery 23 may be provided in the lower case 20. When the cooler 7 is provided in the lower case 20 in this manner, it is preferable to place the fuel tank 3 on the lower case 20 via a heat insulating material 30, as shown in Fig. 2. This prevents the cooler 7 provided in the lower case 20 from receiving heat from the fuel tank 3, and improves the cooling performance of the cooler 7 for the battery 23.

[0020] (Embodiment 2) A second embodiment (Embodiment 2) of the vehicle battery and fuel tank mounting structure according to the present invention will be described below. Note that the description of the second embodiment common to the first embodiment will be omitted where appropriate.

[0021] Fig. 3 is a diagram showing a schematic configuration of a mounting structure 1 for a battery and a fuel tank for a vehicle according to embodiment 2. Generally, in a battery 23 and a fuel tank 3 mounted on a vehicle, the weight Wb of the battery 23 is heavier than the weight Wf of the fuel tank 3 (Wb>wf). Therefore, in the mounting structure 1 for a battery and a fuel tank for a vehicle according to embodiment 2 (hereinafter simply referred to as mounting structure 1), as shown in Fig. 3, the battery 23 is disposed toward the center in the vehicle width direction, and the fuel tank 3 is disposed toward the outside in the vehicle width direction.

[0022] For example, in the mounting structure 1 according to the second embodiment, the distance L in Fig. 3 is the distance between the outer ends of the rocker 5A and the rocker 5B in the vehicle width direction, and the battery 23 is arranged on the lower case 20 so that a part of the battery 23 is located at a position equal to L / 2 in the vehicle width direction (the central position in the vehicle width direction). Also, in the mounting structure 1 according to the second embodiment, the fuel tank 3 is arranged on the lower case 20 so that the fuel tank 3 is located at a position away from the position equal to L / 2 in the vehicle width direction (the central position in the vehicle width direction) to the outside. Note that, in the mounting structure 1 according to the second embodiment, as shown in Fig. 3, the EA material 6A on the battery 23 side is made longer in the vehicle width direction than the EA material 6B on the fuel tank side by an amount corresponding to the position of the battery 23 closer to the center in the vehicle width direction.

[0023] In this way, in the mounting structure 1 of embodiment 2, the heavy battery 23 is positioned closer to the center in the vehicle width direction, and the light fuel tank 3 is positioned closer to the outside in the vehicle width direction, thereby improving the weight balance of the vehicle in the vehicle width direction.

[0024] Furthermore, in the mounting structure 1 according to the second embodiment, when the cooler 7 is provided in the lower case 20, it is preferable to place the fuel tank 3 on the lower case 20 via a heat insulating material 30, as shown in Fig. 4. This prevents the cooler 7 provided in the lower case 20 from receiving heat from the fuel tank 3, and improves the cooling performance of the cooler 7 for the battery 23. [Explanation of symbols]

[0025] 1 Mounting structure 2 battery packs 3 fuel tanks 4 Floor section 5A, 5B Lockers 6A,6B EA material 7 Cooler 20 Lower case 21 Upper Case 23 Batteries 30 Insulation 41 Floor Panel 42 Floor cross member

Claims

1. A floor panel that constitutes a part of the floor portion of the vehicle body; a pair of frame members extending in the vehicle front-rear direction along left and right side edges of the floor panel in the vehicle width direction; a floor cross member disposed on the floor panel and extending in the vehicle width direction so as to connect the pair of frame members; a battery and a fuel tank arranged side by side in a vehicle width direction below the floor panel and between the pair of frame members; A mounting structure for a battery and a fuel tank of a vehicle, the battery is housed in a battery case having a lower case and an upper case, the lower case is fixed to the pair of frame members via an impact absorbing member in the vehicle width direction, The fuel tank is disposed on the lower case, In the event of a side collision of the vehicle, the floor panel and the floor cross member are braced at an upper side of the vehicle between the pair of frame members, and the lower case is braced at a lower side of the vehicle. A vehicle battery and fuel tank mounting structure characterized by the above.

2. 2. The vehicle battery and fuel tank mounting structure according to claim 1, wherein the battery is disposed toward the center in the vehicle width direction, and the fuel tank is disposed toward the outside in the vehicle width direction.

3. a cooler that cools the battery is provided in the lower case, 3. The vehicle battery and fuel tank mounting structure according to claim 1, wherein the fuel tank is disposed on the lower case via a heat insulating member.

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