Vehicle body provided with a high-voltage battery

Abstract

The present invention relates to a vehicle body provided with a high voltage battery, which forms a load path to secure crash rigidity by a reinforcement frame provided between a vehicle body frame and a battery frame, and the battery frame is mounted on the vehicle body frame through the reinforcement frame, thereby improving the robustness and crash rigidity of the battery frame.

Description

TECHNICAL FIELD

[0001] The present application relates to a vehicle body provided with a high-voltage battery, and more particularly, to a vehicle body provided with a high-voltage battery that prevents damage to the battery when a vehicle undergoes a side collision. BACKGROUND

[0002] In recent years, as environmental problems, high oil prices, etc., attention to environmentally friendly vehicles is gradually increasing, and various electric vehicles using electric power to drive the vehicle are being developed.

[0003] As such electric vehicles, a battery-powered EV, a fuel cell EV using a fuel cell as an electric motor, and a hybrid EV using both an electric motor and an engine, etc. are being developed.

[0004] In particular, a battery module for storing electric power is provided in the electric vehicle, and in the battery module, a plurality of battery cells are accommodated inside a battery case. Such a battery module needs to prevent damage to the battery cells from external impact.

[0005] On the other hand, conventionally, only the front longitudinal beam exists as a structure for protecting a high-voltage battery mounted on the floor of the vehicle body at the time of a frontal collision. However, there is a problem in that when a vehicle undergoes a side collision, it is difficult to protect the high-voltage battery only with the front longitudinal beam, and as the vehicle body deforms, the impact is directly transmitted to the high-voltage battery, and thus the high-voltage battery is damaged.

[0006] In particular, in the case where a slide door or a door step or the like is installed on the side of the vehicle, it is difficult to secure rigidity against a side collision due to the lack of a strong side beam structure on the side of the vehicle.

[0007] The contents described in the above background section are only for strengthening the understanding of the background of the present application and should not be considered as acknowledging that the above contents belong to the prior art known to those skilled in the art.

[0008] PRIOR ART DOCUMENTS

[0009] PATENT DOCUMENTS

[0010] (Patent Document 1) JP 2017-193289 A (October 26, 2017) SUMMARY

[0011] (I) Technical Problem to be Solved

[0012] The present application is proposed to solve the above problems, and the object thereof is to provide a vehicle body provided with a high-voltage battery that prevents damage to the battery by dispersing impact when a vehicle undergoes a side collision.

[0013] (II) Technical Solution

[0014] The vehicle body provided with a high-voltage battery according to the present application for achieving the above object includes a vehicle body frame including first side sills provided at both sides of the vehicle body and extending in a front-rear direction of the vehicle body and second side sills provided outward below the first side sills to form a mounting space of a side member together with the first side sills; a battery frame provided at a lower side of the vehicle body frame, provided with a battery between side portions at both sides, and fastened to a lower portion of the vehicle body frame by a plurality of mounting portions; and a reinforcement frame provided between the vehicle body frame and the battery frame and including a side reinforcement member extending along the side portions of the battery frame outward of the side portions and fastened to the side portions and the second side sills and a cross reinforcement member extending across the battery frame and connected to the side reinforcement members and fastened to the lower portion of the vehicle body frame by the mounting portions of the battery frame.

[0015] The vehicle body provided with a high-voltage battery is characterized in that the vehicle body frame is configured in a multipurpose vehicle in which a side member including a sliding door or a door step is mounted in the mounting space.

[0016] The vehicle body provided with a high-voltage battery is characterized in that the side portions are formed with a connection end portion extending downward of the side reinforcement members so that the side reinforcement members are bolted or riveted to each other in a state in which the side reinforcement members are seated on the connection end portion in the up-down direction.

[0017] The vehicle body provided with a high-voltage battery is characterized in that a plurality of the mounting portions are arranged in the front-rear direction in the battery frame, a plurality of the cross reinforcement members connecting the side reinforcement members are provided in the front-rear direction in the reinforcement frame, and some of the cross reinforcement members are provided so that the mounting portions pass through the cross reinforcement members.

[0018] The vehicle body provided with a high-voltage battery is characterized in that, in the cross reinforcement member through which the mounting portion passes, the mounting portion passes through the cross reinforcement member in the up-down direction, and a reinforcement rib covering the passing mounting portion is formed.

[0019] The vehicle body provided with a high-voltage battery is characterized in that the side reinforcement members are formed with a fastening end portion extending downward of the second side sills so that the second side sills are bolted or riveted to each other in a state in which the second side sills are seated on the fastening end portion in the up-down direction.

[0020] The vehicle body provided with a high-voltage battery is characterized in that the cross reinforcement members extend toward the side reinforcement members at both sides at an upper side of the battery frame, and an upper coupling portion coupled to an upper side surface of the side reinforcement member and a side coupling portion coupled to an inner side surface of the side reinforcement member are formed at both end portions of the cross reinforcement members.

[0021] The vehicle body provided with the high-voltage battery is characterized in that the reinforcement frame further includes a connecting bracket connecting the lateral reinforcement member and the first side beam.

[0022] (III) Beneficial Effects

[0023] The vehicle body provided with the high-voltage battery of the above-described structure forms a load path by the reinforcement frame provided between the vehicle body frame and the battery frame to secure the crash rigidity, and the battery frame is mounted on the vehicle body frame through the reinforcement frame, thereby improving the rigidity and the crash rigidity of the battery frame. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figures 1 to 2 FIG. 1 is a view showing a vehicle body provided with a high-voltage battery according to the present application.

[0025] Figure 3 FIG. 2 is a view showing Figure 1 the load path of the vehicle body provided with the high-voltage battery shown in FIG. 1.

[0026] Figure 4 FIG. 3 is a view showing Figure 1 the cross-sectional view of the vehicle body provided with the high-voltage battery shown in FIG. 1.

[0027] Figure 5 FIG. 4 is a view showing Figure 1 the reinforcement rib of the vehicle body provided with the high-voltage battery shown in FIG. 1.

[0028] Figure 6 FIG. 5 is a view showing Figure 1 the joint of the reinforcement frame of the vehicle body provided with the high-voltage battery shown in FIG. 1.

[0029] Figure 7 FIG. 6 is a view showing Figure 1 the connecting bracket of the vehicle body provided with the high-voltage battery shown in FIG. 1.

[0030] REFERENCE NUMERALS

[0031] 100: vehicle body frame 110: first side beam

[0032] 120: second side beam 130: mounting space

[0033] 200: battery frame 210: side portion

[0034] 211: connecting end portion 220: mounting portion

[0035] 300: reinforcement frame 310: side reinforcement member

[0036] 311: fastening end portion 320: lateral reinforcement member

[0037] 321: reinforcement rib 322: upper joint

[0038] 323: Side joint; 330: Connecting bracket Detailed Implementation

[0039] Hereinafter, a preferred embodiment of a vehicle body equipped with a high-voltage battery according to the present invention will be described with reference to the accompanying drawings.

[0040] Figures 1 to 2 This is a diagram showing a vehicle body equipped with a high-voltage battery according to the present invention. Figure 3 It is shown Figure 1 The diagram shows the load path of a vehicle body equipped with a high-voltage battery. Figure 4 yes Figure 1 The diagram shown is a cross-sectional view of the vehicle body equipped with a high-voltage battery. Figure 5 It is shown Figure 1 The diagram shows the reinforcing ribs of the vehicle body equipped with a high-voltage battery. Figure 6 It is shown Figure 1 The diagram shows the joint of the reinforcing frame of the vehicle body, which houses the high-voltage battery. Figure 7 It is shown Figure 1 The diagram shows the connecting bracket of the vehicle body equipped with a high-voltage battery.

[0041] like Figures 1 to 4 As shown, the vehicle body equipped with a high-voltage battery according to the present invention includes: a vehicle body frame 100, which includes a first side beam 110 respectively disposed on both sides of the vehicle body and extending in the longitudinal direction of the vehicle body, and a second side beam 120 disposed spaced outward and downward from the first side beam 110 to form a mounting space 130 for a side member together with the first side beam 110; and a battery frame 200 located on the lower side of the vehicle body frame 100, with the battery disposed between the side portions 210 on both sides, and fastened to the vehicle body frame 100 by a plurality of mounting portions 220. The lower part; and a reinforcing frame 300, located between the vehicle frame 100 and the battery frame 200, and including a side reinforcing member 310 and a transverse reinforcing member 320, the side reinforcing member 310 extending along the side 210 outside the side 210 of the battery frame 200 and fastened to the side 210 and the second side beam 120, the transverse reinforcing member 320 extending across the battery frame 200 and connected to the side reinforcing member 310, and fastened to the lower part of the vehicle frame via a mounting portion 220 of the battery frame 200.

[0042] As described above, the present application includes a body frame 100, a battery frame 200, and a reinforcement frame 300. Among them, the body frame 100 corresponds to a body floor and includes a first side beam 110 disposed on both sides and a second side beam 120 disposed apart from the first side beam 110 along the outside lower side. The body frame 100 can include various members constituting the body, for example, a cross member 100a extending transversely to connect the first side beam 110, a pillar member 100b extending upward, etc. Especially, in the body frame 100 of the present application, the first side beam 110 and the second side beam 120 together form a mounting space 130 of a side member. Among them, the side member can include a sliding door or a door step, etc., and the mounting space 130 is formed by the first side beam 110 and the second side beam 120 disposed apart to mount the side member through the mounting space 130. That is, the body frame 100 of the present application is configured in a multipurpose vehicle, and in the case of a multipurpose vehicle having a side member, the side collision strength is reduced, so the reinforcement frame 300 is provided to compensate for the side collision vulnerability.

[0043] On the other hand, the battery frame 200 is located on the lower side of the body frame 100 and is provided with side portions 210 on both sides. Such a battery frame 200 can include a front portion 200a and a rear portion 200b connecting the side portions 210 on both sides, and a battery is built in between the side portions 210, so that the battery can be protected. In addition, the battery frame 200 is provided with a mounting portion 220 for mounting to the body frame 100, and can be bolted or riveted to the body frame 100 through the mounting portion 220 to be fixed.

[0044] Especially, the reinforcement frame 300 in the present application is provided between the body frame 100 and the battery frame 200 to reinforce the rigidity of the battery frame 200. The reinforcement frame 300 includes a side reinforcement member 310 extending along the side portion 210 of the battery frame 200 on the outside of the side portion 210 and fastened to the side portion 210 and the second side beam 120, and a transverse reinforcement member 320 extending across the battery frame 200 and connected to the side reinforcement member 310 and fastened to the body frame lower portion through the mounting portion 220 of the battery frame 200. The side reinforcement member 310 and the transverse reinforcement member 320 of such a reinforcement frame 300 form a load path, so that the collision load generated when the vehicle is side-impacted is dispersed from the side reinforcement member 310 to the transverse reinforcement member 320, thus ensuring the collision rigidity.

[0045] Specifically, since the side reinforcement member 310 of the reinforcement frame 300 is positioned outside the side portion 210 of the battery frame 200, direct collision with the battery frame 200 is avoided when a side collision of the vehicle occurs, and a load path is formed by the lateral reinforcement member 320 connected to the side reinforcement member 310, so that a load caused by the collision is dispersed to reduce damage to the battery case.

[0046] Further, since the side reinforcement member 310 of the reinforcement frame 300 is fastened to the side portion 210 and the second side beam 120, the combined rigidity of the vehicle body frame 100 and the battery frame 200 is secured, and the mounting portion 220 fastened to the vehicle body frame 100 passes through the lateral reinforcement member 320, so that the fastening strength of the mounting portion 220 is secured.

[0047] As described above, in the present application, when a side collision occurs, a collision load is dispersed through the load path of the reinforcement frame 300, so that the battery frame 200 is protected from impact, and the combined rigidity of the battery frame 200 and the vehicle body frame 100 is secured.

[0048] The above-described present application will be described in detail as follows. Figure 2 As shown, the side portion 210 is formed with a connection end portion 211 extending to the lower side of the side reinforcement member 310, so that in a state where the side reinforcement member 310 is seated on the connection end portion 211, bolt connection or riveting can be performed in the up-down direction to fasten to each other.

[0049] Thus, the connection end portion 211 extends from the side portion 210 of the battery frame 200, and the side reinforcement member 310 of the reinforcement frame 300 is seated on the connection end portion 211, so that the reinforcement frame 300 and the battery frame 200 are easily combined, and the combined rigidity of the battery frame 200 and the reinforcement frame 300 is secured. In particular, the battery frame 200 is bolt connected or riveted to the side reinforcement member 310 of the reinforcement frame 300 in the up-down direction through the connection end portion 211 to fasten, so that the operation convenience when combining the battery frame 200 and the reinforcement frame 300 is improved, and when a side collision occurs, the bolt connection portion or the riveting portion is avoided from being directly impacted to secure stability. Further, since the side portion 210 of the battery frame 200 and the side reinforcement member 310 of the reinforcement frame 300 are not directly fastened, impact transmitted to the side reinforcement member 310 when a side collision occurs is not directly transmitted to the side portion 210, but is dispersed through the load path of the lateral reinforcement member 320 to reduce the impact.

[0050] On the other hand, in the battery frame 200, a plurality of the mounting portions 220 are arranged in the front-rear direction. Although the mounting portions 220 are arranged in pairs in the center of the battery frame 200 and are arranged apart in the front-rear direction, the number and mounting positions of the mounting portions 220 can be changed according to the required coupling rigidity of the battery frame 200 and the vehicle body frame 100.

[0051] In the reinforcement frame 300, the lateral reinforcement members 320 connecting the side reinforcement members 310 are provided in plurality in the front-rear direction, and part of the lateral reinforcement members 320 are provided so that the mounting portions 220 pass through the lateral reinforcement members 320. In the reinforcement frame 300, the plurality of lateral reinforcement members 320 are provided to form a load path together with the side reinforcement members 310. Among them, since part of the lateral reinforcement members 320 are provided so that the mounting portions 220 pass through the lateral reinforcement members 320, the mounting portions 220 pass through and are supported by the support reinforcement members 320. Therefore, the mounting portions 220 of the battery frame 200 are supported by the lateral reinforcement members 320 of the reinforcement frame 300, so that the rigidity can be ensured and a stable coupling structure is maintained.

[0052] Further, as shown in Figure 5 the lateral reinforcement members 320 through which the mounting portions 220 pass, the mounting portions 220 pass through the lateral reinforcement members 320 in the up-down direction, and a reinforcement rib 321 covering the passed mounting portions 220 can be formed. The reinforcement rib 321 can be formed on the lateral reinforcement members 320 and cover the mounting portions 220 along the periphery of the mounting portions 220, and the reinforcement rib 321 extends upwardly inclined, so that the mounting portions 220 can be more stably supported.

[0053] On the other hand, the side reinforcement members 310 are formed with a fastening end portion 311 extending toward the lower side of the second side beam 120 so that, in a state in which the second side beam 120 is seated on the fastening end portion 311, bolt connection or riveting is performed in the up-down direction to be fastened to each other.

[0054] Thus, by forming the fastening end portion 311 extending from the side reinforcement members 310 of the reinforcement frame 300 and the second side beam 120 of the vehicle body frame 100 is seated on the fastening end portion 311, the reinforcement frame 300 and the vehicle body frame 100 are easily coupled, and the coupling rigidity of the reinforcement frame 300 and the vehicle body frame 100 is ensured. In particular, the reinforcement frame 300 is bolt connected or riveted to the second side beam 120 of the vehicle body frame 100 in the up-down direction by the side reinforcement members 310 to be fastened, thereby improving the operation convenience when coupling the reinforcement frame 300 and the vehicle body frame 100, and avoiding that the bolt portion or the riveting portion is directly impacted when a side collision occurs, ensuring stability.

[0055] Thus, the coupling rigidity of the reinforcement frame 300 and the vehicle body frame 100 is secured, and thus the reinforcement frame 300 and the vehicle body frame 100 disperse the impact when a side collision occurs to reduce the impact transmitted to the side of the battery frame 200, and the reinforcement frame 300 and the vehicle body frame 100 can form a load path together.

[0056] On the other hand, as shown in FIG. 2, the lateral reinforcement member 320 extends toward the side reinforcement members 310 at the upper side of the battery frame 200, and upper coupling portions 322 and side coupling portions 323 are formed at both end portions of the lateral reinforcement member 320 to be coupled to the upper side surface and the inner side surface of the side reinforcement members 310. Figure 6

[0057] That is, the reinforcement frame 300 is positioned between the vehicle body frame 100 and the battery frame 200, and the lateral reinforcement member 320 extends toward the side reinforcement members 310 at the upper side of the battery frame 200. The upper coupling portions 322 and the side coupling portions 323 are formed at both end portions of the side reinforcement members 310 to be in contact with the upper side surface and the inner side surface of the side reinforcement members 310. Thus, the lateral reinforcement member 320 has a strong support structure at the inner side of the side reinforcement members 310 at both sides, and is coupled to the upper side surface and the inner side surface of the side reinforcement members 310 through the upper coupling portions 322 and the side coupling portions 323, thereby securing the coupling rigidity.

[0058] On the other hand, as shown in FIG. 2, the lateral reinforcement member 320 extends toward the side reinforcement members 310 at the upper side of the battery frame 200, and upper coupling portions 322 and side coupling portions 323 are formed at both end portions of the lateral reinforcement member 320 to be coupled to the upper side surface and the inner side surface of the side reinforcement members 310. Figure 7

[0059] That is, the lateral reinforcement member 320 of the reinforcement frame 300 and the first side beam 110 of the vehicle body frame 100 are connected through the connection bracket 330, and thus the coupling rigidity between the reinforcement frame 300 and the vehicle body frame 100 is secured. The connection bracket 330 can be coupled to the first side beam 110 of the vehicle body frame 100 and the seat mounting member at the same time. As described above, the connection bracket 330 is provided between the lateral reinforcement member 320 of the reinforcement frame 300 and the first side beam 110 of the vehicle body frame 100 and connects the lateral reinforcement member 320 of the reinforcement frame 300 and the first side beam 110 of the vehicle body frame 100, so that the coupling rigidity of the vehicle body frame 100 and the reinforcement frame 300 is increased, and the reinforcement frame 300 forms a load path with the first side beam 110 through the connection bracket 330, thereby dispersing the impact load generated when a side collision occurs.

[0060] The vehicle body provided with a high-voltage battery having the above-described structure forms a load path through the reinforcement frame provided between the vehicle body frame and the battery frame to secure the impact rigidity, and the battery frame is mounted on the vehicle body frame through the reinforcement frame, thereby improving the rigidity and the impact rigidity of the battery frame.​​

[0061] The application has been described in detail by way of specific embodiments, but many modifications and variations thereto will be apparent to those skilled in the art without departing from the spirit and technical scope of the application provided by the claims.

Claims

1. A vehicle body provided with a high-voltage battery, comprising: a vehicle body frame including first side sills provided respectively at both sides of the vehicle body and extending in a front-rear direction of the vehicle body, and second side sills provided outwardly below the first side sills to form mounting spaces for side members together with the first side sills; a battery frame located at a lower side of the vehicle body frame, provided with a battery between side portions at both sides, and fastened to a lower portion of the vehicle body frame by a plurality of mounting portions; and a reinforcement frame located between the vehicle body frame and the battery frame, and including side reinforcement members extending along the side portions of the battery frame outwardly of the side portions and fastened to the side portions and the second side sills, and a cross reinforcement member extending across the battery frame and connected to the side reinforcement members, and fastened to the lower portion of the vehicle body frame by the mounting portions of the battery frame, characterized in that the side portions are formed with connecting end portions extending toward lower sides of the side reinforcement members so as to be bolted or riveted to each other in a vertical direction in a state where the side reinforcement members are seated on the connecting end portions.

2. The vehicle body provided with a high-voltage battery according to claim 1, characterized in that the vehicle body frame is configured in a multipurpose vehicle in which side members including a sliding door or a door step are mounted in the mounting spaces.

3. The vehicle body provided with a high-voltage battery according to claim 1, characterized in that a plurality of the mounting portions are arranged in the front-rear direction in the battery frame, a plurality of the cross reinforcement members connecting the side reinforcement members are provided in the front-rear direction in the reinforcement frame, and some of the cross reinforcement members are provided so that the mounting portions pass through the cross reinforcement members.

4. The vehicle body provided with a high-voltage battery according to claim 3, characterized in that in the cross reinforcement member through which the mounting portion passes, the mounting portion passes through the cross reinforcement member in the vertical direction, and a reinforcement rib covering the passing mounting portion is formed.

5. The vehicle body provided with a high-voltage battery according to claim 1, characterized in that the side reinforcement member is formed with a fastening end portion extending toward a lower side of the second side sill so as to be bolted or riveted to each other in the vertical direction in a state where the second side sill is seated on the fastening end portion.

6. The vehicle body provided with a high-voltage battery according to claim 1, characterized in that the cross reinforcement member extends toward the side reinforcement members at both sides on an upper side of the battery frame, and upper coupling portions coupled to upper faces of the side reinforcement members and side coupling portions coupled to inner faces of the side reinforcement members are formed at both end portions of the cross reinforcement member.

7. The vehicle body provided with a high-voltage battery according to claim 1, characterized in that the reinforcement frame further includes a connecting bracket connecting the cross reinforcement member and the first side sill. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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