Vehicle

Abstract

To achieve both a wiring structure for a wire harness and a vibration-proof structure for an upper case while saving space.SOLUTION: A vehicle includes: a battery case including an upper case and a lower case; a frame member facing the upper case; and a wire harness. The upper case includes a first case-side portion formed so as to be recessed inside the upper case with respect to a case-side reference portion. The frame member includes a first frame-side portion facing the first case-side portion and formed so as to be recessed inside the frame member with respect to a frame-side reference portion. The wire harness is disposed so as to pass through an empty space between the first case-side portion and the first frame-side portion, and includes a covering portion formed of an elastic member that covers an outer periphery of the wire harness. The covering portion is in contact with the first case-side portion and the first frame-side portion and is sandwiched between the first case-side portion and the first frame-side portion.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a vehicle equipped with a battery pack.

Background Art

[0002] Patent Document 1 discloses a vehicle equipped with a battery pack. In this vehicle, a cable is disposed inside the upper case of the battery pack. Further, an elastic member is disposed so as to be interposed between the upper case and the floor panel of the vehicle for vibration prevention of the upper case.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the vehicle described in Patent Document 1, the cable (wire harness) is disposed inside the battery case having an upper case. Therefore, in this vehicle, it is necessary to separately establish the wiring structure of the wire harness and the vibration prevention structure of the upper case. As a result, the space secured for making these structures compatible has become large.

[0005] The present disclosure has been made in view of the above problems, and an object thereof is to provide a vehicle that can achieve both a wiring structure of a wire harness and a vibration prevention structure of an upper case while reducing the space.

Means for Solving the Problems

[0006] The vehicle according to the present disclosure includes a battery case, a frame member, and a wire harness. The battery case includes an upper case and a lower case and houses a battery. The frame member faces the upper case. The upper case includes a first case-side portion. The frame member includes a first frame-side portion facing the first case-side portion. The wire harness is disposed so as to pass through a gap between the first case-side portion and the first frame-side portion, and includes a covering portion formed by an elastic member covering the outer periphery of the wire harness. The covering portion is in contact with the first case-side portion and the first frame-side portion and is sandwiched between the first case-side portion and the first frame-side portion.

[0007] The vehicle may further include a damper member. The upper case may include a second case-side portion protruding toward the frame member. The frame member may face the second case-side portion and include a second frame-side portion protruding toward the upper case. And the damper member may be in contact with each of the second case-side portion and the second frame-side portion and be sandwiched between the second case-side portion and the second frame-side portion.

[0008] The battery case may include a plurality of support portions disposed between the upper case and the lower case and supporting the upper case. The plurality of support portions may include a first support portion supporting the first case-side portion and a second support portion, different from the first support portion, supporting the second case-side portion.

Advantages of the Invention

[0009] According to the vehicle of the present disclosure, it is possible to achieve both a space-saving arrangement and a compatible arrangement of the wiring structure of the wire harness and the vibration-proof structure of the upper case.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0011] Embodiments of the present disclosure will be described together with the accompanying drawings. In addition, the same reference numerals are given to the common elements in each figure, and the overlapping descriptions are omitted or simplified.

[0012] 1. Basic Structure Related to Mounting of Battery Pack FIG. 1 is a diagram for explaining an example of a vehicle 1 according to the embodiment. Note that the direction of "Fr" shown in FIG. 1 corresponds to the front direction of the vehicle 1, and the direction of "UPR" corresponds to the upward direction of the vehicle 1.

[0013] The vehicle 1 shown in FIG. 1 is, for example, a battery electric vehicle (BEV). Alternatively, the vehicle 1 may be, for example, a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), or a fuel cell electric vehicle (FCEV). The vehicle 1 has a ladder frame structure. However, the vehicle 1 may be a vehicle that does not have a ladder frame structure, that is, a vehicle having, for example, a monocoque structure.

[0014] The vehicle 1 includes a battery pack 10. The battery pack 10 stores electric power supplied to an electric motor that drives the vehicle 1. The battery pack 10 is mounted under the floor of the vehicle 1.

[0015] FIG. 2 is a diagram for explaining the basic structure related to the mounting of the battery pack 10 shown in FIG. 1. FIG. 2 corresponds to a view of the configuration around the battery pack 10 as seen from above the vehicle 1. Note that the direction of "RH" shown in FIG. 2 corresponds to the right direction of the vehicle 1.

[0016] The battery pack 10 includes a battery 12 and a battery case 14 that houses the battery 12. The battery 12 is, for example, a lithium-ion secondary battery. The configuration of the battery 12 is not particularly limited. As an example, the battery 12 has a plurality of stacks of a plurality of battery cells (battery stack) 12a). Inside the battery case 14, a plurality of (for example, six) battery stacks 12a are arranged side by side in the vehicle front-rear direction in a direction extending along the vehicle left-right direction. The battery case 14 includes an upper case 16 and a lower case 18 (see FIG. 3).

[0017] Also, as shown in FIG. 2, the vehicle 1 includes a ladder frame 2. The ladder frame 2 includes a pair of left and right side members 2a corresponding to the main frame, and cross members 2b and 2c corresponding to the sub-frame. Each of the side members 2a is formed to extend along the front-rear direction of the vehicle 1. Each of the front cross member 2b and the rear cross member 2c is formed to extend in the vehicle left-right direction and is connected to the pair of side members 2a.

[0018] Furthermore, the vehicle 1 includes one or more frame members 3. As an example, there are three frame members 3. Each of the frame members 3 is formed to extend along the vehicle left-right direction at a position between the front cross member 2b and the rear cross member 2c and is connected to the pair of side members 2a. Note that the frame member 3 may correspond to a cross member included in the ladder frame 2, or may be additionally provided for mounting the battery pack 10.

[0019] The body of vehicle 1 (not shown) is disposed above the ladder frame 2. On the other hand, as shown in FIG. 2, the battery case 14 is disposed below the ladder frame 2 at positions in the vehicle longitudinal direction where the cross members 2b and 2c are present. For this reason, the upper case 16 has portions facing the ladder frame 2 and the frame member 3.

[0020] The battery case 14 is attached to the vehicle 1 using the ladder frame 2. More specifically, the attachment method of the battery case 14 using the ladder frame 2 is not particularly limited. That is, for example, the battery case 14 is fastened at an arbitrary position to the ladder frame 2 or an arbitrary support member (not shown) fixed to the ladder frame 2 using a fastener (for example, a combination of a bolt and a nut).

[0021] 2. Structure related to routing of wire harness and vibration prevention of upper case The vehicle 1 includes various wire harnesses. Among the wire harnesses, there are those arranged to pass around the battery pack 10, such as the wire harness 20 shown in FIG. 2. As an example, one end of the wire harness 20 is connected to a device such as a junction box or an electronic control unit (ECU) housed inside the battery pack 10.

[0022] In the vehicle 1, it is required that the routing and fixing of the wire harness 20 are achieved within a limited space. Further, when the battery pack 10 is mounted under the floor of the vehicle 1, due to the vibration of the upper case 16, there is a possibility of generating noise due to contact between the upper case 16 and the components inside or around the battery pack 10, or damage to the components. Such vibration prevention measures are also required to be achieved within a limited space.

[0023] In view of the above problems, the vehicle 1 of the present embodiment includes the following wire harness routing structure and upper case vibration prevention structure. FIG. 3 is a view showing a cross section taken along line B - B in FIG. 2. FIG. 4 is a view showing a cross section taken along line A - A in FIG. 2.

[0024] As shown in FIG. 3, the upper case 16 includes a first part (first case side part) 16a. The frame member 3 includes a first part (first frame side part) 3a that faces the first part 16a. Note that, as an example, the combination of the first parts 16a and 3a is provided at two locations with respect to one frame member 3 as shown in FIG. 3, but it may be provided at one location or at three or more locations.

[0025] The wire harness 20 is arranged so as to pass through the gap between the first part 16a and the first part 3a. In the example shown in FIG. 3, a pair of wire harnesses 20a are arranged so as to pass through the gap between one first part 16a and the first part 3a, and a single wire harness 20b is arranged so as to pass through the gap between the other first part 16a and the first part 3a.

[0026] The pair of wire harnesses 20a has a covering part 22. The covering part 22 is formed of an elastic member (for example, rubber) that covers the outer periphery of each wire harness 20a. The covering part 22 is in contact with each of the first part 16a and the first part 3a and is sandwiched between the first part 16a and the first part 3a. In other words, the covering part 22 is supported while being compressed by being sandwiched between the first part 16a and the first part 3a. The same applies to the other covering part 24.

[0027] More specifically, as shown in FIG. 3, the first part 16a of the upper case 16 is formed to be recessed inside the upper case 16 compared to the surrounding parts, and the first part 3a of the frame member 3 is formed to be recessed inside the frame member 3 compared to the surrounding parts. By having such a cross-sectional shape, the wire harness 20 can be guided into the gap between the first part 16a and the first part 3a and can be positioned well. Also, while suppressing the height of the frame member 3 and the battery pack 10 in the vehicle up-and-down direction, the routing of the wire harness 20 can be achieved. Instead of the example having such a concave shape, the first part 16a may protrude toward the frame member 3 compared to the surrounding parts, or may have neither a concave shape nor a convex shape. The same applies to the first part 3a on the side of the frame member 3.

[0028] Furthermore, the battery case 14 includes a support member 26 (support part) that supports the first part 16a of the upper case 16. The support member 26 is disposed between the first part 16a and the lower case 18. The support member 26 is disposed for each first part 16a. More specifically, in the example of the battery case 14, the lower case 18 includes a battery cross member 18a formed to extend in parallel with the battery laminate 12a between adjacent battery laminates 12a. The support member 26 is disposed between the battery cross member 18a and the first part 16a. More specifically, one end of the support member 26 in the vehicle up-and-down direction is placed on the upper surface of the lower case 18 (battery cross member 18a). The other end of the support member 26 supports the surface on the side opposite to the outer surface of the first part 16a facing the frame member 3.

[0029] Also, as already described, the vehicle 1 includes three frame members 3 as an example. Therefore, as shown in FIG. 4, the wire harness routing structure and the vibration-proof structure of the upper case using the first parts 16a and 3a are applied to each of the three frame members 3.

[0030] As described above, according to the present embodiment, the wire harness 20 covered by the covering portion 22 or 24 formed of an elastic member is disposed so as to be sandwiched between the first portion 16a of the upper case 16 and the first portion 3a of the frame member 3. Thereby, while achieving space saving, the wiring structure of the wire harness and the vibration isolation structure of the upper case can be suitably compatible with each other.

[0031] Further, the first portion 16a of the upper case 16 is supported by a support member 26 interposed between the first portion 16a and the lower case 18. According to such a support structure, the first portion 16a can be pressed against the covering portion 22 or 24 with high rigidity. This contributes to the improvement of the vibration isolation effect of the upper case 16.

[0032] Each of FIGS. 5(A) and 5(B) is a diagram showing another application example of the wiring structure and the vibration isolation structure according to the embodiment.

[0033] FIG. 5(A) shows an example including one wire harness 28 passing around the battery pack 10. In this example, the wire harness 28 extends in the vehicle longitudinal direction at the center in the vehicle left-right direction. In this example, in each of the three frame members 3, the wire harness 28 covered by the covering portion 30 formed of an elastic member is disposed so as to be sandwiched between the first portion 16a of the upper case 16 and the first portion 3a of the frame member 3.

[0034] FIG. 5(B) shows an example including two wire harnesses 32 and 34 passing around the battery pack 10. The wire harness 32 is disposed so as to extend in the vehicle longitudinal direction along the gap between one side member 2a of the ladder frame 2 and the upper case 16. Similarly, the wire harness 34 is disposed so as to extend in the vehicle longitudinal direction along the gap between the other side member 2a and the upper case 16.

[0035] In the example shown in FIG. 5(B), each of the pair of side members 2a corresponds to another example of the "frame member" according to the present disclosure. Therefore, in this example, the upper case 16 has a first portion 16a at a position facing the side member 2a, and the side member 2a has a first portion 2a1 facing the first portion 16a. And a wire harness 34 covered by a covering portion 36 formed of an elastic member is disposed so as to be sandwiched between the first portion 16a and the first portion 2a1. The covering portion 36 may be provided so as to extend over the entire first portions 16a and 2a1 in the vehicle longitudinal direction, or a plurality of covering portions 36 may be provided at predetermined intervals. The same applies to the configuration on the wire harness 34 side.

[0036] 3. Example with the second vibration isolation structure In order to further enhance the vibration isolation effect of the upper case, the vehicle 1 may also include the following "second vibration isolation structure" together with the wiring structure of the wire harness and the vibration isolation structure of the upper case (hereinafter referred to as the "first vibration isolation structure") of the above-described embodiment.

[0037] FIG. 6 is a diagram for explaining the second vibration isolation structure according to the embodiment. The example shown in FIG. 6 shows a cross section at the same position as in FIG. 3. In this example, the vehicle 1 includes a wiring structure and a first vibration isolation structure for the wire harness 20a, and also includes a second portion 16b and a damper member 38 as the second vibration isolation structure.

[0038] As shown in FIG. 6, the second part (second case side part) 16b of the upper case 16 protrudes toward the side of the frame member 3 (more specifically, toward the side of the second part 3b) compared to the surrounding parts. Further, the second part (second frame side part) 3b of the frame member 3 faces the second part 16b and protrudes toward the side of the upper case 16 (more specifically, toward the side of the second part 16b) compared to the surrounding parts. And the damper member 38 is, for example, rubber. The damper member 38 is in contact with each of the second part 16b and the second part 3b and is sandwiched between the second part 16b and the second part 3b. More specifically, the damper member 38 is supported while being compressed by being sandwiched between the second part 16b and the second part 3b.

[0039] More specifically, in the example shown in FIG. 6, the battery case 14 includes a support member 40 (second support part) that supports the second part 16b of the upper case 16. The support member 40 is disposed between the second part 16b and the lower case 18 (for example, the battery cross member 18a). In this way, the second part 16b is supported by a support member 40 (second support part) different from the support member 26 (first support part) that supports the first part 16a. More specifically, similar to the support member 26, one end of the support member 40 in the vehicle up - down direction is placed on the upper surface of the lower case 18 (the battery cross member 18a). The other end of the support member 40 supports the surface on the side opposite to the outer surface of the second part 16b facing the frame member 3. According to the support structure by the support member 40, the second part 16b can be pressed against the damper member 38 with high rigidity. This also contributes to the improvement of the vibration - proof effect of the upper case 16.

[0040] According to the second vibration - proof structure described above, the damper member 38 is sandwiched between the second part 16b and the second part 3b that protrude so as to approach each other. Thereby, while suppressing the interference between the frame member 3 and the upper case 16 during a collision of the vehicle 1, the vibration of the upper case 16 can be more effectively suppressed.

[0041] Regarding the point that interference between the frame member 3 and the upper case 16 can be suppressed during a collision, the following supplementary explanation is provided. Different from the above configuration, if the second part 3b is formed to be recessed on the side of the frame member 3, in order to make the size of the gap between the second part 16b where the damper member 38 is arranged and the second part 3b appropriate, it is necessary to greatly protrude the second part 16b toward the frame member 3. As a result, the second part 16b comes close to the part of the frame member 3 located around the second part 3b. As a result, when an input acts on the frame member 3 from, for example, the left - right direction of the vehicle during a collision of the vehicle 1, interference between the frame member 3 and the upper case 16 is likely to occur. On the other hand, according to the configuration shown in FIG. 6, such interference can be easily suppressed.

[0042] Also, in the example shown in FIG. 6, one of the plurality of support parts (support members 26 and 40), the first support part (support member 26), is used for the wiring structure of the wire harness and the first anti - vibration structure. And the other of the plurality of support parts, the second support part (support member 40), is used for the second anti - vibration structure. According to such a structure, space saving and suppression of interference between members (between the frame member 3 and the upper case 16) can be achieved simultaneously.

[0043] In addition, in the example shown in FIG. 6, the combination of the wiring structure and the first anti - vibration structure and the second anti - vibration structure are applied to the same frame member 3. Instead of such an example, the second anti - vibration structure may be applied to a frame member 3 different from the frame member 3 to which the combination of the wiring structure and the first anti - vibration structure is applied.

[0044] Also, the above - mentioned second anti - vibration structure may be applied to other positions of the frame member 3 and the upper case 16 (for example, a plurality of parts C represented by a dashed - dotted line in FIG. 2).

Explanation of Reference Numerals

[0045] 1 Vehicle, 2 Ladder frame, 2a Pair of side members, 2a1, 3a First frame side part, 2b, 2c Cross members, 3 Frame member, 3b Second frame side part, 10 Battery pack, 12 Battery, 14 Battery case, 16 Upper case, 16a First case side part, 16b Second case side part, 18 Lower case, 18a Battery cross member, 20, 20a, 20b, 28, 32, 34 Wire harness, 22, 24, 30, 36 Coating part, 26, 40 Support member, 38 Damper member

Claims

1. a battery case including an upper case and a lower case and housing a battery; a frame member facing the upper case; Wire harness and A vehicle comprising: the upper case includes a first case side portion, the first case-side portion is formed to be recessed inwardly of the upper case compared to a case-side reference portion, which is a portion of the upper case that is continuous with the first case-side portion and faces the frame member, the frame member includes a first frame side portion opposed to the first case side portion, the first frame-side portion is formed to be recessed inward of the frame member compared to a frame-side reference portion, which is a portion of the frame member that is continuous with the first frame-side portion and faces the upper case, the wire harness is disposed so as to pass through a gap between the first case portion and the first frame portion, and includes a covering portion formed of an elastic member covering an outer periphery of the wire harness, The covering portion is in contact with the first case-side portion and the first frame-side portion, and is sandwiched between the first case-side portion and the first frame-side portion. A vehicle characterized by:

2. a battery case including an upper case and a lower case and housing a battery; a frame member facing the upper case; A damper member; A vehicle comprising: the upper case includes a second case side portion, the second case-side portion protrudes toward the frame member as compared with a case-side reference portion, which is a portion of the upper case that is continuous with the second case-side portion and faces the frame member; the frame member includes a second frame side portion opposed to the second case side portion, the second frame-side portion protrudes toward the upper case as compared with a frame-side reference portion, which is a portion of the frame member that is continuous with the second frame-side portion and faces the upper case, The damper member is in contact with each of the second case-side portion and the second frame-side portion, and is sandwiched between the second case-side portion and the second frame-side portion. A vehicle characterized by:

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