KR101262537B1 - Body for Electric Vehicle - Google Patents

Abstract

An electric vehicle body, in particular a lower body, is provided.
The electric vehicle body includes a side seal; And a reinforcing member provided at least one inside the member, wherein the reinforcing member is provided inside the member, wherein the reinforcing member is provided to increase the deformation resistance of the member. One or more of these recesses or recesses provided in the direction, and an extension portion in which a part of the member is extended may be further provided.
According to the present invention, the side collision or the front collision is improved by improving the bonding structure between the cross member structure and the mounting member while integrally providing a cross member mounted between the side seals across the floor panel on which the battery package is mounted. It is possible to prevent damage to the battery package, which is a high-priced part, as well as to improve the joint structure between the side seal and the seat mounting member, and ultimately, the improved effect of improving the structural rigidity of the body of the electric vehicle, in particular, the lower body is obtained. Can be.

Description

Body for Electric Vehicle

The present invention relates to an electric vehicle body, and more particularly, to improve the bonding structure between the cross member structure and the mounting member while integrally providing a cross member mounted between the side seals across the floor panel on which the battery package is mounted. Through this, it is possible to suppress the damage of the expensive battery package in the case of side impact or frontal impact as much as possible, and to improve the joint structure between the side seal and the seat mounting member, and ultimately, the structural rigidity of the body of the electric vehicle, in particular, the lower body The improved electric vehicle body.

In recent years, attention has been focused on environmentally friendly electric vehicles for the future environment, and the research and development has been focused on steelmakers who produce materials for automobile bodies as well as automobile manufacturers. to be.

On the other hand, such an electric vehicle includes a battery inside to receive power from the outside when necessary to charge the battery to implement the driving of the vehicle by powering the power charged in the battery, battery-related design and research and development have.

At this time, such a battery package (package) is usually mounted on the lower portion of the floor member provided between the side seals of the lower vehicle body (see FIG. 2 below).

By the way, although not shown in a separate drawing, in the conventional case, the transverse members connected laterally between the side seals on the floor member are separated due to the structure of the body floor member or the tunnel channel through which the exhaust system passes in the case of gasoline vehicles. It was a structure to be mounted.

Therefore, in the case of the conventional lateral member is a structure that is mounted separately, there is a problem that the resistance to resist the impact load due to the impact applied from the side of the vehicle in particular is insufficient.

For example, in North America and Europe, there is a collision test, that is, a pole collision test, which simulates a collision between a side of a vehicle and a pole (for example, a power pole, etc.). PL) is collided, and in Europe, a test is performed in an environment in which the pole PL collides perpendicularly to the side of the vehicle.

Accordingly, as described above and shown in FIG. 13, a pole PL such as a power pole among CM1 and CM2, which are conventional separating members provided separately from both sides of the conventional tunnel panel CM, collides from the side. When the impact load easily collapses the side seal (unsigned) and the separated transverse member between them, the battery package (shown schematically in FIG. 13) disposed under the follower member is easily broken. It was to be.

That is, in the related art, when the pole collides and enters due to the separated horizontal member, there is a problem in that an expensive battery cell built in the battery package is easily broken.

Accordingly, the applicant of the present invention effectively suppresses damage to the battery package even when a pole or the like penetrates into the side of the electric vehicle by improving the structure of the cross member between the side seals, i. The present invention made possible.

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above conventional problems, and an object thereof is to provide a crossing member structure and a mounting member integrally providing a cross member mounted between side seals across a floor panel on which a battery package is mounted. By improving the joint structure with the side, it is possible to suppress the damage of the expensive battery package in the case of side collision or frontal impact as much as possible, and also to improve the joint structure between the side seal and the seat mounting member. An object of the present invention is to provide an electric vehicle body with improved structural rigidity of the lower body.

The present invention as a technical aspect for achieving the above object, the side seal; And

An integral crossing member connected between the side seals;

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An electric vehicle body is further provided with at least one seat mounting member provided in the unitary crossing member.

Preferably, further comprising a floor panel coupled to the side seal and the integral cross member through the lower body while the battery package is mounted on the lower portion of the lower body damage of the battery package when the impact of the vehicle body is applied at least through the integral cross member It is configured to suppress.

More preferably, provided to the integral crossing member to increase the deformation resistance of the member,

One or more reinforcing members provided inside the member;

Recesses or recesses provided in the longitudinal direction of the member; And

An extension in which a portion of the member is extended;

Any one or these are further provided in combination.

At this time, it may further include a reinforcing tunnel panel coupled to the vehicle body front side in a right angle direction of the integrated cross member is provided to block the application of the impact to the battery package by the front collision.

Preferably, the reinforcing tunnel panel further comprises a surface having a curvature.

At this time, the curvature surface of the reinforcing tunnel panel is provided on the upper surface while being provided in a structure extending from the curved surface in the longitudinal direction of the panel to suppress the buckling upon applying the impact, the curvature R of the curvature surface is formed to 1200-1700 mm Can be.

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More preferably, the integrated cross member and the seat mounting member are coupled to the side seal in a bonded state.

In this case, the seat mounting member may include: a first joining portion through which the unitary cross member is joined; and a second joining unit with a side of the unitary crossing member joined; And at least a first joining portion of the third joining portion to which the flange of the integrated crossing member is joined.

Preferably, the seat mounting member further includes a second recess provided in close contact with a longitudinal recess provided in the unitary crossing member to further increase the deformation resistance of the member.

More preferably, a hole is formed in the second groove portion of the seat mounting member to form a surface joint between the crossing member and the mounting member by welding.

According to the present invention, the side collision or the front collision is improved by improving the bonding structure between the cross member structure and the mounting member while integrally providing a cross member mounted between the side seals across the floor panel on which the battery package is mounted. It is possible to minimize the damage to the battery package, which is a expensive part.

Thus, the present invention more reliably provides the stability of major components such as expensive battery cells.

In addition, the present invention improves the joint structure between the side seal and the seat mounting member, and ultimately improves the structural rigidity of the body of the electric vehicle, in particular of the lower body.

1 is a schematic diagram showing an electric vehicle body of the present invention
2 is an exploded perspective view showing main parts of a vehicle body (lower vehicle body) in which a battery package (package) according to the present invention is assembled;
Figure 3 is an exploded perspective view showing the structure of the present invention electric vehicle body of Figure 2
4 is a cross-sectional view taken along line AA of FIG. 3.
5 is a cross-sectional view taken along the line 'B-B' of FIG.
Fig. 6 is a perspective view showing main parts of a seat mounting member mounted to the integrated crossing member of the present invention.
Figure 7 is a perspective view showing a combined state of the present invention integrated cross member and side seal and seat mounting member
8 is a front structural view showing a coupling structure of the present invention the integral cross member and the seat mounting member;
FIG. 9 is a plan view of FIG. 8.
10 is a perspective view showing another modification of the unitary crossing member of the present invention;
11A and 11B are schematic diagrams showing battery package breakage suppression under the environment of the pole crash test of North America and Europe of FIG. 12 in the vehicle body structure of the present invention;
12 is a schematic diagram showing a conventional pole crash test of North America and Europe.
13 is a schematic view showing a modified state of the battery mounting portion by the conventional horizontal member separated;

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

First, FIG. 1 schematically shows a state including main components of an electric vehicle body 1, that is, a lower vehicle body according to the present invention. In FIGS. 2 and 3, an assembly state diagram and an exploded perspective view of the present invention are shown. The electric vehicle body is shown.

4 and 5 are cross-sectional views taken along lines 'A-A' and 'B-B' of FIG. 2.

Therefore, the electric vehicle body 1 of this invention has the structural feature which consists essentially of the side seal 10 and the integral cross member 30 connected between the said side seals.

That is, the electric vehicle body 1 of the present invention is characterized in that the cross member 30 is formed between the side seals integrally with the tube instead of the separation type by the central tunnel channel as in the conventional art of FIG.

For example, as shown in Figs. 3 to 5, the integral cross member 30 of the present invention is preferably made of a high-strength material of 1200 MPa. It is produced through a roll forming process of forming a material.

Of course, the integral cross member of the present invention does not necessarily have to satisfy the above strength condition.

However, as the integrated crossing member 30 of the present invention basically illustrates the simulation in FIG. 11 below, the side impact load in the case where the impact applied from the side of the vehicle, for example, the pole PL, such as a power pole, collides. While being provided to withstand, it is possible to effectively suppress the breakage of the battery cell (150 of FIG. 4), which is a particularly expensive material, in the battery package (package) 100 mounted below the vehicle body.

Meanwhile, the integrated cross member 30 of the present invention may be manufactured through a modern hydroforming process.

Of course, it may be appropriately selected in terms of roll forming, hydroforming, or material strength conditions, that is, formability.

At this time, as shown in Figure 2 and 3, in the electric vehicle body 1 of the present invention, further comprises a floor panel 50 coupled via the side seal 10 and the integral cross member 30 as a medium. do.

Therefore, the electric vehicle body of the present invention is composed of a lower body provided with a floor panel 50, while the battery package 100 is mounted on the lower side of the vehicle body via the integral cross member 30 of the present invention. It is provided to suppress the breakage of the battery package when the impact load is applied.

Meanwhile, the battery package 100 has a lower frame 130 mounted below the upper case 110, and a lower case (unsigned) is assembled between the lower frame 130 and the upper case, and expensive therein. The battery cell 150 as a component is built in.

4 and 5, the lower frame 130 of the battery package may be firmly welded to the side seal 10 or assembled into a separate fastening structure.

Therefore, the impact applied to the side seal immediately affects the battery package, and accordingly, the present invention prevents the integral cross member 30 from excessively distorting the side seal inwards, thereby making it more stable to damage the battery package 100. This can be suppressed.

Meanwhile, as shown in FIGS. 3 and 4, at least one reinforcing member may be bonded to the floor member 50 to increase the deformation resistance of the crossing member. 32) That is, the reinforcing bracket member may be further provided.

Therefore, when the impact load is applied to the integrated cross member 30, these reinforcing members 32 make it possible to suppress not only bending deformation but also excessive deformation such as buckling.

Alternatively, the integrated cross member 30 of the present invention may include a concave portion 34 or a concave-convex portion provided in a longitudinal direction on its upper surface as a U-shaped cross section.

Therefore, since the recessed part 34 forms the recessed part recessed downward along the cross member in the longitudinal direction, it is to raise the repulsive force more resistant to torsion and bending deformation of the member in this part.

In addition, such groove 34 may be provided on both sides of the crossing member.

On the other hand, the flange portion (30a) may be provided integrally on both sides of the lower end of the integrated cross member (1) of the present invention, such a flange portion (30a) and the flange portion (unsigned) of the side seal 10 It may be provided as a bonding surface respectively bonded to the floor panel 50.

In addition, as shown in FIG. 10, in the case of the integrated cross member 30 of the present invention, an extension unit 36 may further include at least a portion of the member extending both ends through roll forming. .

Therefore, the expansion portion 36 of the present invention is to increase the torsional or bending resistance of the member to more firmly withstand the impact load applied from the side.

Such an extension 36 may be sufficiently expanded through roll forming, for example, through a known flexible roll forming method.

As a result, the integrated cross member 1 of the present invention preferably enhances its strength through the recess 34 and the expansion 36 formed in the longitudinal direction at least in part, while the reinforcing member 32 which is a separate bracket member. ) To increase the strength.

In other words, the integrated cross member 1 of the present invention is provided with a junction between the side seal 10 while maximizing its own strength, including the various structural features above, to provide a very good electric vehicle body.

Next, as shown in Figures 2 and 3, the reinforcing tunnel panel 90 may be further attached to the central portion of the integrated cross member 30 of the present invention in a right angle thereof.

That is, as shown in FIGS. 3 and 5, the reinforcing tunnel panel 90 may be joined with a floor panel 50 at its flange portion, and above all, vertically disposed forward of the integrated cross member 30. While the impact load due to the frontal collision is not transmitted to the integrated crossing member 30 as it is, the first to be crushed to absorb the impact load while making it possible to more effectively suppress the damage of the crossing member.

In this case, the reinforcing tunnel panel 90 may be fixed to the flange 30a of the integrated cross member 30 of the present invention through the joining member 92.

In addition, a reinforcement panel 94 may be provided on the floor panel to the opposite side of the reinforcement tunnel panel 90.

More preferably, as shown in Figures 3 and 5, the reinforcing tunnel panel 90 further includes a surface having a curvature, the curvature surface of such a reinforcing tunnel panel is a conventional flat surface (top surface) This makes it possible to suppress the shape of buckling at the end of the panel (the contact surface of the integral cross member) in the event of a collision as compared to forming a.

On the other hand, more preferably the curvature surface of the reinforcing tunnel panel of the present invention is not shown as a separate reference in Figs. 3 and 5, while being provided on the upper surface of the panel form the panel is lifted from the front side in the longitudinal direction of the panel It is most preferable to suppress or prevent the buckling from the beginning of the furnace curved surface to be provided in a planar structure on the opposite side of the panel.

For example, it is more effective to suppress buckling if a curved surface is formed in the panel body portion than the curved surface is formed to the end of the panel.

At this time, the curvature of the curvature surface (unsigned) formed on the upper surface of the reinforcing tunnel panel is preferably R-1200-1700 mm, if the curvature R is less than 1200mm, the shape of the curvature surface is too small to suppress buckling On the contrary, if the curvature R is greater than 1700 mm, the effect becomes almost flat and buckling occurs at the panel end (contacting part of the integrated cross member).

3 and 4, the side seal 10 is connected to the side seal 10 under the floor panel 50 via a connecting member 98 to maintain the strength of the follower panel. And a reinforcing beam 96 for suppressing deformation factors such as torsion.

Next, as shown in FIGS. 3 and 6, the integrated crossing member 30 of the present invention may be provided as a seat mounting member while one or more seat mounting members 70 are mounted.

At this time, as shown in Figure 3 and 6, the seat mounting member 70 has a seat mounting bracket 80 having a screw groove for screwing the seat may be assembled at both ends.

On the other hand, in FIGS. 2 and 3, the integrated mounting member 30 of the present invention is joined to the integrated cross member by the seat mounting members 80 before the joint fixing between the side seals 10. The seat mounting members 80 are bonded to the side seal 10, as shown in FIG.

That is, when the integrated cross member 30 is first bonded to the flange of the side seal and the floor panel 50 between the side seals 10, the mounting of the seat mounting member 80 is difficult, and in particular, the strength is weak.

Therefore, the seat mounting member 80 is firmly bonded to the integrated cross member 30 to have a tight and rigid strength, and in this state, the seat mounting member 80 is joined to the side seal, the floor panel, and the like.

On the other hand, as shown in Figs. 6 and 7, the seat mounting member 70 of the present invention is somewhat different structurally depending on the mounting position, for example, the mounting member and the center seat of the side seals on both sides There is some difference in structure from the mounting member.

However, basically, the seat mounting member 70 of the present invention may include several joints in order to increase the bonding strength with the integrated cross member 30.

That is, as shown in Figs. 6 and 7, the seat mounting member 70 of the present invention is the first bonding portion 72 (that is, the upper bonding surface) through which the integrated cross member 30 is bonded, Of the second joint portion 74 bent vertically from the member to which the side of the integral cross member is joined, and the third joint portion 76 (that is, the seat mounting member 70 to which the flange 30a of the integrated cross member is joined). Some incisions) at least the first junction.

However, preferably, since the first to third joint portions 72, 74, 76 of the seat mounting member 70 are joined to the integrated crossing member 30 in the multi-stage position, its rigidity is stably maintained. To make it possible.

In FIG. 7, the first to third joint parts 72, 74, and 76 are shown only in the seat mounting member 70 assembled to the side seal 100, but in reality, the seat mounting members at different positions in FIG. 6 are illustrated. It is natural that the first to third junctions are provided.

However, the strength of the integral cross member in close contact with the upper and lower portions of the opening portion through which the integral cross member 30 of the present invention penetrates, the bent second joining portion 74 of the opening portion, and the mounting member for the opening portion Will enable maintenance.

On the other hand, as shown in Figure 8, the longitudinal groove portion 34 provided in the unitary cross member 30 in the upper surface of the seat mounting member 70 to which the present invention unitary cross member 30 is passed and joined. Forming the second groove portion 78 corresponding to the grooves are in close contact with each other to enable more effective suppression of the bending of the integral cross member.

That is, as shown in Figure 8, the longitudinal groove portion 34 provided in the integral cross member 30 and the second groove portion 78 provided in the seat mounting member 70 are in close contact with each other. As a structure for supporting the, as a result to increase the deformation resistance of the members.

Next, FIG. 9 shows a plan view of FIGS. 7 and 8, for example, at least one hole 79 in the second recess 78 of the seat mounting member which is in close contact with the recess 34 of the integrated cross member. ) And spot welding, for example, known plug welding.

Accordingly, as shown in the enlarged view of FIG. 9, one or more slits are formed in the second recess 78 of the seat mounting member 70 joined to the recess 78 of the integrated cross member 30. The welding layer (w) to which the crossing member and the seat mounting member are joined at the time of welding through the hole 79 is formed, thereby maximizing the joining force between the integrated cross member 30 and the seat mounting member.

As described above, in the case of the present invention, since the joining unitary cross member 30 and the seat mounting member 70 are joined first, and then the unitary cross member and the seat mounting member are joined to the side seal, such a sheet is formed. Spot welding between the mounting member and the integral cross member is not difficult, and automated welding may be possible in advance.

In this case, as shown in FIG. 7, the both end members joined to the side seal 10 of the seat mounting member 70 are integrally provided with a joint end 82 forming a joint surface with the side seal 10. Flange portions 86a, 86b, 86c joined to the side seal flange and the floor panel may be further provided integrally.

Of course, the center seat mounting members 70 that do not contact the side seals in FIG. 6 may be provided with a flange portion for joining the reinforcing tunnel panel 90 and the like, which is not related to the side seals.

Next, in FIGS. 11A and 11B, as in FIGS. 12A and 12B, when the pole crash test in North America and Europe is applied, in the case of using the integral cross member 30 provided with a joint between the side seals of the present invention, the member As the deformation of the circuit is reduced, as shown in FIG. 13, the complete breakage of the conventional battery package 100 is basically blocked.

While the invention has been shown and described in connection with specific embodiments so far, it will be appreciated that various changes and modifications can be made in the art without departing from the spirit or scope of the invention as set forth in the claims below. It is to be understood that one of ordinary skill can easily know.

1 .... electric car body (lower body) 10 .... side seal
30 .... integral cross member 32 .... reinforcement member
34 .. Longitudinal groove or uneven portion 36 .... Extension
70 .... seat mounting member 72 .... first connection
74 .... second junction 76 .... third junction
78 .... 2nd groove 79 .... Hole
90 .... reinforced tunnel panel 100 .... battery package
110 ... top case 130 ... bottom frame
150 .... Battery Cell

Claims (11)

Side seals 10; And
An integral crossing member 30 connected between the side seals;
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And at least one seat mounting member (70) provided in said integral crossing member (30).
The method of claim 1,
Further comprising a floor panel 50 coupled to the side seal 10 and the integral cross member 30 as a lower vehicle body, the battery package 100 is mounted on the lower portion of the unit body at least through the integral cross member. An electric vehicle body, characterized in that configured to suppress damage of the battery package when the impact of the vehicle body is applied.
The method of claim 1,
Provided to the integrated crossing member 30 to increase the deformation resistance of the member,
One or more reinforcing members 32 provided inside the member;
Recesses 34 or irregularities provided in the longitudinal direction of the member; And
An extension 36 in which a portion of the member is extended;
Electric vehicle body, characterized in that any one or more of them are provided in combination.
The method of claim 1,
A reinforcing tunnel panel 90 coupled to the front side of the vehicle body in a right angle direction of the integrated crossing member to absorb a shock to the battery package due to a front collision and thereby to prevent breakage of the battery package;
An electric vehicle body further comprising a.
5. The method of claim 4,
The reinforcing tunnel panel 90 has a surface having a curvature;
An electric vehicle body further comprising a.
The method of claim 5,
The curvature surface of the reinforcing tunnel panel 90 is provided on the upper surface while being provided in a structure extending from the curved surface in the longitudinal direction of the panel to suppress buckling upon applying the impact, and the curvature R of the curved surface is 1200-1700 mm. An electric vehicle body, characterized in that formed.
delete The method of claim 1,
And the unitary crossing member and the seat mounting member are coupled to the side seal in a state where they are joined.
The method of claim 1,
The seat mounting member 70 may include: a first joining portion 72 through which the unitary crossing member 30 is joined;
A second joint part 74 to which side surfaces of the integrated crossing member are joined; And
A third joint portion 76 to which the flange of the integrated crossing member is joined;
An electric vehicle body comprising at least a first joint of the.
The method of claim 1,
The seat mounting member 70 includes: a second recess 78 provided to increase the deformation resistance of the member while being in close contact with the longitudinal recess 34 provided in the unitary crossing member 30;
An electric vehicle body further comprising a.
The method of claim 10,
A hole (79) is formed in the second groove portion (78) of the seat mounting member, and the surface of the electric vehicle body and the mounting member is formed by welding.

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