Mounting structure for power electric module and vehicle body provided with the same

A power electric module mounting structure may include a front side member provided in a longitudinal direction of a vehicle body and including a side surface formed in an internal direction of the vehicle body and an upper surface connected to the side surface, a bulk head mounted inside the front side member, and a mounting bracket connected to the side surface and the upper surface of the front side member through the bulk head to mount a power electric module on the mounting bracket.

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims priority to and the benefit of Korean Patent Application No. 10-2021-0001394 filed on Jan. 6, 2021, the entire contents of which is incorporated herein for all purposes by this reference.

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a power electric module mounting structure and a vehicle body including the same. More particularly, the present invention relates to a power electric module mounting structure and a vehicle body including the same, which improves the performance of collision and noise, vibration, and harshness (NVH), and secures a front trunk space.

Description of Related Art

Globally, research on electric vehicles (EVs) is accelerating in a response to exhaust gas regulations and the demand for environment-friendly vehicles. Here, the electric vehicle may include both a battery-powered vehicle and a hydrogen-based fuel cell vehicle.

In the case of a general EV-only vehicle, it is being developed to mount a power electric module on the sub-frame by having a sub-frame under the vehicle. When the power electric module is mounted through the sub-frame, the distance between the sub-frames from the mass center of the power electric module is short, which is advantageous in terms of durability and noise, vibration, and harshness (NVH) performance.

However, when developing a vehicle based on a vehicle that mounts a general internal combustion engine and an EV vehicle derived therefrom as a vehicle, it may be difficult to mount a sub-frame or the mounting cost may increase considerably.

Therefore, it may be considered that the power electric module of the derived EV vehicle is mounted on the side member, but there may be a problem of separation when a vehicle crashes.

Furthermore, mounting the power electric module to the upper panel of the vehicle body may be considered, but in the instant case, the distance between the sub-frames from the mass center of the power electric module is relatively long, resulting in disadvantages in durability and NVH performance. Furthermore, there is a problem in that the space occupied by the power electric module is relatively large, so that the space for using the front trunk is relatively reduced.

BRIEF SUMMARY

Various aspects of the present invention are directed to providing a power electric module mounting structure and a vehicle body including the same, which improves the performance of collision and NVH, and secures a front trunk space.

A power electric module mounting structure according to various exemplary embodiments of the present invention may include a front side member provided in a longitudinal direction of a vehicle body and including a side surface formed in an internal direction of the vehicle body and an upper surface connected to the side surface, a bulk head mounted inside the front side member, and a mounting bracket connected to the side surface and the upper surface of the front side member through the bulk head to mount a power electric module on the mounting bracket.

The bulk head may include a first connection portion for coupling with the mounting bracket, and a second connection portion bent from the first connection portion.

The bulk head may further include a connection pipe connected to the first connection portion, and a connection rod mounted on the second connection portion.

The first connection portion may include a first recess portion formed stepped inwardly.

The first connection portion may further include a second recess portion formed more concave inward than the first recess portion to mount the connection pipe.

In the second connection portion, a connection hole to which the connection rod is connected may be formed.

The bulk head may further include an extension curved from the first connection portion.

The bulk head may be provided in plural, and the mounting bracket may be connected to at least two bulk heads.

The mounting bracket may include a bracket side connection portion connected to the side surface, and a bracket upper connection portion connected to the upper surface.

A trunk compartment may be formed on the upper portion of the power electric module.

An EV vehicle according to various exemplary embodiments of the present invention may include the power electric module mounting structure.

According to various exemplary embodiments of the present invention, it is possible to reduce the size of the power electric module assembly, securing the space available for the front trunk by mounting the power electric module on the side member,

According to various exemplary embodiments of the present invention, the relative distance between the central axis of the power electric module and the mount position may be reduced, thus suppressing the vibration in the up and down direction of the power electric module.

According to various exemplary embodiments of the present invention, it is possible to improve the rolling characteristics of the power electric module by mounting the power electric module through the side and upper surfaces of the side members.

Furthermore, the effect obtained or predicted by various exemplary embodiments of the present invention will be included directly or implicitly in the detailed description of various exemplary embodiments of the present invention. That is, various effects predicted according to various exemplary embodiments of the present invention will be included within a detailed description to be described later.

DETAILED DESCRIPTION

In the following detailed description, only certain exemplary embodiments of the present invention have been shown and described, simply by way of illustration.

Parts indicated by the same reference numerals throughout the specification refer to the same components.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity.

When a part such as a layer, film, region, or plate is said to be “on” another part, this includes not only the case directly above the other part, but also the case where there is another part in the middle.

In contrast, when an element is referred to as being “directly on” another element, there are no intervening elements present.

Throughout the specification, when a part “includes” a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

FIG.1is a top plan view of a power electric module mounting structure according to various exemplary embodiments of the present invention,FIG.2is a perspective view of a power electric module mounting structure according to various exemplary embodiments of the present invention, andFIG.3is a cross-sectional perspective view along the line III-III ofFIG.2.

Referring toFIG.1toFIG.3, a power electric module mounting structure according to various exemplary embodiments of the present invention may include a front side member20provided in a longitudinal direction of a vehicle body10and including a side surface22formed in an internal direction of the vehicle body10and an upper surface24connected to the side surface22, a bulk head30mounted inside the front side member20, and a mounting bracket50connected to the side surface22and the upper surface24of the front side member20through the bulk head30to mount a power electric module60.

In general power electric module mounting structure, a power electric module is mounted on an upper portion of the front side member or the upper portion of the front side member and the vehicle body, for example, a sub-frame, and the distance between the sub-frames from a center of gravity of the power electric module is relatively long, so that durability and NVH performance may be adversely affected.

However, in the power electric module mounting structure according to the exemplary embodiment of the present invention, the power electric module60is mounted on the side surface22and the upper surface24of the front side member20through a module mounting portion56and the mounting bracket50. Accordingly, the connection position between the power electric module60and the front side member20may be relatively close, and the difference in height between the center of gravity of the power electric module60and the front side member20may also be reduced.

The vehicle according to the exemplary embodiment of the present invention includes the power electric module60and may be an EV vehicle to which the power electric module mounting structure according to the exemplary embodiment of the present invention is applied.

The front side member20includes a front side internal panel27including the side surface22, the upper surface24and a lower surface26, and a front side external panel28, and the front side internal panel27and the front side external panel28may form a closed cross-section, and the bulk head30may be mounted in the closed cross-section.

FIG.4andFIG.5is a perspective view of a bulk head which may be applied to a power electric module mounting structure according to various exemplary embodiments of the present invention.

Referring toFIG.2toFIG.5, the bulk head30may include a first connection portion32for coupling with the mounting bracket50, and a second connection portion40bent from the first connection portion32.

The bulk head30may further include a connection pipe34connected to the first connection portion32, and a connection rod42mounted on the second connection portion40.

The drawing shows that the connection pipe34is provided in the upper surface24direction and the connection rod42is provided in the side surface22direction thereof, but is not limited thereto, and the opposite configuration is also possible.

The first connection portion32may include a first recess portion36formed stepped inwardly. The first recess portion36is formed in the up and down directions of the front side member20to increase the up and down direction strength of the front side member20.

The first connection portion32may further include a second recess portion38formed more concave inward than the first recess portion36to mount the connection pipe34. The second recess portion38may mount the connection pipe34without any additional configuration. Furthermore, the second recess portion38is concave more inward than the first recess portion36, and a connection portion between the second recess portion38and the first recess portion36may support the lower portion of the connection pipe34.

In the connection pipe34, for example, a connection bolt35is inserted to mount the mounting bracket50.

In the second connection portion40, a connection hole44to which the connection rod42is coupled may be formed. The connection rod42may include a rod head42a, a rod body42bconnected to the rod head42aand protruded through the connection hole44, and the rod head42ahas a relatively larger diameter than the connection hole44diameter. Thus, the connection rod42may be rigidly mounted to the second connection portion40with a simple configuration.

The bulk head30may further include extensions46and48bent from the first connection portion32. The extensions46and48may support the inside of the upper surface24and the lower surface26of the front side member20, respectively, so that the bulk head30and the front side member20may be more rigidly coupled.

Referring toFIG.1toFIG.3, the bulk head30is provided in plural, and the mounting bracket50may be combined with at least two bulk heads30. Only one the bulk head30is shown in the drawing, but the bulk head30may be provided in any suitable number to mount the mounting bracket50inside the front side member20.

The mounting bracket50may include a bracket side connection portion52connected to the side surface22and a bracket upper connection portion54connected to the upper surface24. Mounting holes53and55are formed in the bracket side connection portion52and the bracket upper connection portion54, respectively, so that the connection bolt35and the connection rod42may be inserted into the mounting holes53and55, respectively. Furthermore, the mounting bracket50may be connected to the side surface22and the upper surface24of the front side member20through the connection bolt35and the connection rod42.

FIG.6is a cross-sectional view of a vehicle body including a power electric module mounting structure according to various exemplary embodiments of the present invention, andFIG.7is a cross-sectional view of a vehicle body including a typical power electric module mounting structure.

A trunk compartment70may be formed on the upper portion of the power electric module60.

InFIG.6andFIG.7, the X-line is an imaginary line passing through the mass centers of the power electric modules60, and61, and A is a connection portion between the power electric module mount module60and the side member20according to various exemplary embodiments of the present invention, for example it is an imaginary line indicating the mount position of the connection bolt35. B represents a connection portion between a general power electric module mount module61and a side member, or a sub-frame.

Referring toFIG.6andFIG.7, it may be seen that the trunk compartment70is relatively large due to the power electric module mounting structure according to various exemplary embodiments of the present invention, compared to the lower surface and trunk compartment71according to the general mount configuration.

Comparing to the general mounting structure, in the power electric module mounting structure according to various exemplary embodiments of the present invention, the relative distance between the imaginary line passing through the mass center of the power electric module60and the connection portion (A) of the power electric module mount module60and the side member20is reduced by approximately 40% and thus it may improve durability performance and NVH performance.

Furthermore, in the exemplary embodiment of the power electric module mounting structure, the upper space of the power electric module mount module60may be secured, so that space utilization, for example, trunk compartment may be expanded.

Furthermore, in the power electric module mounting structure according to various exemplary embodiments of the present invention, the power electric module60is mounted on the side surface22and the upper surface24of the front side member20to prevent the power electric module60from rolling so that it may provide a robust structure.

Furthermore, in the power electric module mounting structure according to various exemplary embodiments of the present invention, a closed cross-section is formed inside the front side member20, and the bulk head30is provided in the closed cross-section. Thus, in a case of a vehicle collision, the power electric module60may be prevented from being separated.