Device for reinforcing side part of electric vehicle body

Abstract

The present invention relates to an apparatus for reinforcing a side portion of a vehicle body of an electric vehicle, the apparatus comprising: a lower side member inner panel configured to be coupled to opposite sides of a seat cross member; a side sill inner reinforcement configured to be attached to an outer surface of the side sill inner panel; and a battery mounting tube including an upper portion configured to be coupled to a bottom portion of the side sill inner reinforcement, and a lower portion configured to be coupled to a lower plate portion of the side sill inner plate.

Description

Technical Field

[0001] The present invention relates to a device for reinforcing the side of an electric vehicle body, and more particularly to a device for reinforcing the side of an electric vehicle body by improving collision energy absorption performance. Background Art

[0002] As the introduction and distribution of electric vehicles becomes more common, continued research and development is devoted to enhancing the design of electric vehicle bodies to meet various crash performance requirements.

[0003] In particular, in a vehicle body structure for an electric vehicle, a side portion of the electric vehicle is used in a structure that protects a cab and a battery pack from a small overlap collision and a side collision.

[0004] Figure 1 is a perspective view of one example of a side portion of a conventional electric vehicle body. Figure 2 is a schematic cross-sectional view of an example of a side portion of a conventional electric vehicle body.

[0005] like Figure 1 and 2 As shown, the side sill inner panels 20 are respectively joined to opposite sides of the seat cross member 10 supporting the inner floor of the vehicle by welding, etc. On the outer side of each side sill inner panel 20, a side sill inner reinforcement 30-1 as a kind of collision energy absorbing member is arranged.

[0006] In addition, the side sill outer panel 40 covering each side sill inner reinforcement 30 - 1 is joined to the outer surface of each side sill inner panel 20 by welding or the like.

[0007] Therefore, if Figure 2 As shown, the side sill inner reinforcement 30 - 1 may be disposed in a sealed space between the side sill inner panel 20 and the side sill outer panel 40 to absorb impact.

[0008] At this time, if Figure 2 As shown, the side sill inner reinforcement 30 - 1 may be inserted and fastened to the fastening tube 22 mounted on the bottom of the side sill inner panel 20 to be maintained in a fixed state.

[0009] However, the side portion of the electric vehicle body according to the conventional example has the following problems.

[0010] In the side structure of the electric vehicle body according to the conventional example, the side sill inner reinforcement 30 - 1 has disadvantages such as large cross-sectional area, large volume, and large weight, etc. Therefore, these disadvantages increase the weight of the electric vehicle.

[0011] In the side structure of the electric vehicle body according to the conventional example, the side sill inner reinforcement 30-1 is characterized by a large cross-sectional area and volume, making it bulky. Therefore, these disadvantages lead to an increase in the total weight of the electric vehicle.

[0012] Figure 3 is a schematic cross-sectional view of another example of a side portion of a conventional electric vehicle body.

[0013] A side portion of a body of an electric vehicle according to another conventional example is characterized in that it is configured to reduce the weight of the electric vehicle.

[0014] For this reason, in the side structure of an electric vehicle body according to another conventional example, a side sill inner reinforcement 30 - 2 is applied to a structure having a reduced cross-sectional area, volume, and weight compared to a side sill inner reinforcement ( 30 - 1 ).

[0015] like Figure 3 As shown, the side sill inner panels 20 are respectively joined to opposite sides of the seat cross member 10 supporting the inner floor of the vehicle by welding, etc. On the outer side of each side sill inner panel 20, a side sill inner reinforcement 30-2 as a kind of collision energy absorbing member is arranged.

[0016] Furthermore, each side sill inner reinforcement 30 - 2 is covered by a side sill outer panel 40 that is joined to the outer surface of each side sill inner panel 20 by welding or the like.

[0017] Therefore, if Figure 3 As shown, the side sill inner reinforcement 30 - 2 may be disposed in a sealed space between the side sill inner panel 20 and the side sill outer panel 40 to absorb impact.

[0018] For reference, the battery pack may be located at the bottom of the seat crossbar 10 .

[0019] like Figure 3 As shown, the side sill inner reinforcement 30 - 2 is in close contact with the outer surface of the side sill inner panel 20 and is coupled with the side sill inner panel 20 by fastening bolts 24 .

[0020] In detail, after the inner end of the side sill inner reinforcement 30-2 is closely aligned with the outer surface of the side sill inner panel 20, the fastening bolt 24 is inserted from the inner end of the side sill inner reinforcement 30-2 and fastened to the side sill inner panel 20. This ensures that the side sill inner reinforcement 30-2 can be maintained in a fixed state.

[0021] However, although the side portion of the vehicle body for an electric vehicle according to another conventional example can achieve weight reduction by reducing the cross-sectional area, volume, and weight of the side sill inner reinforcement 30 - 2 , the following problems still exist.

[0022] First, the inner end of the side sill inner reinforcement 30-2 is fixed to the side sill inner panel 20 only by the fastening bolts 24 without any load supporting structure supporting the bottom of the side sill inner reinforcement 30-2. Therefore, there is a problem that the side sill inner reinforcement 30-2 sags downward due to its own weight.

[0023] Second, when the side beam inner reinforcement 30-2 sags downward due to its own weight, noise is generated due to driving vibration. In addition, when a small overlap collision and a side collision occur, there is a problem that the side beam inner reinforcement 30-2 cannot accurately absorb the collision energy.

[0024] The information described in the background technology section is only intended to help understand the background of the present invention. Therefore, the information described in the background technology section does not mean that the present invention falls within the scope of the relevant technology known to ordinary technicians in the field. Summary of the invention

[0025] The present invention is proposed in consideration of the above problems that occur in the related prior art. The present invention aims to provide a device for reinforcing the side of an electric vehicle body, wherein a load support structure that supports the bottom of a side sill inner reinforcement is mounted on a side sill inner plate to ensure that the side sill inner reinforcement remains fixed in place. Therefore, the collision energy absorption performance after a small overlap collision and a side collision is improved, and weight reduction is achieved compared to conventional technologies.

[0026] In order to achieve the above-mentioned object, according to the present invention, a device for reinforcing the side of an electric vehicle body can be provided. The device includes: a lower longitudinal beam inner plate, which is configured to be coupled to opposite sides of a seat cross beam. The device also includes: a lower longitudinal beam inner reinforcement, which is configured to be attached to the outer surface of the lower longitudinal beam inner plate. The device also includes a battery mounting tube, including: an upper portion, which is configured to be coupled to the bottom of the lower longitudinal beam inner reinforcement, and a lower portion, which is configured to be coupled to the lower plate portion of the lower longitudinal beam inner plate.

[0027] In the apparatus for reinforcing the side of an electric vehicle body, the apparatus further includes a side sill inner patch having an upper portion configured to be coupled to a bottom of the side sill inner reinforcement and a lower portion configured to be coupled to a lower periphery of a battery mounting tube.

[0028] The side sill inner patch includes a first side sill inner patch, which is disposed in a structure configured to support the bottom of the side sill inner reinforcement together with the battery mounting tube. The side sill inner patch also includes a second side sill inner patch, which is disposed in a structure configured to support the bottom of the side sill inner reinforcement together with the battery mounting tube, and covers a portion of the outer surface and the upper surface of the side sill inner reinforcement.

[0029] The first lower longitudinal beam inner patch includes: an upper support plate, which is configured to be fastened to the bottom of the lower longitudinal beam inner reinforcement by bolts and is welded to the upper end of the battery mounting tube; a lower support plate, which is configured to be welded to the lower periphery of the battery mounting tube; and a vertical support plate, which is configured to be integrally connected between the inner ends of the upper support plate and the lower support plate, and is arranged to be parallel to the outer surface of the lower longitudinal beam inner plate in the vertical direction.

[0030] The second lower longitudinal beam inner patch includes: an upper support plate, which is configured to be fastened to the bottom of the lower longitudinal beam inner reinforcement by bolts and welded to the upper end of the battery mounting tube; a lower support plate, which is configured to be welded to the lower periphery of the battery mounting tube; a vertical support plate, which is configured to be integrally connected between the inner ends of the upper support plate and the lower support plate, and is arranged to be parallel to the outer surface of the lower longitudinal beam inner plate in the vertical direction; a protective body, which is configured to be bent twice from the outer end of the upper support plate and extend upward to cover a part of the outer surface and the upper surface of the lower longitudinal beam inner reinforcement; and an upper connecting plate, which extends from the upper end of the protective body and is joined to the upper end of the lower longitudinal beam inner plate by welding.

[0031] The outer surface of the side sill inner reinforcement and the inner surface of the side sill inner panel are bonded using an adhesive or a tape.

[0032] The battery mounting tube may be provided in a structure having an internal thread portion and an inner diameter portion. The internal thread portion may be provided on the inner diameter portion. In addition, when the lower end portion of the battery mounting tube is coupled to the lower plate portion of the lower longitudinal beam inner plate, the internal thread portion is exposed below the lower plate portion of the lower longitudinal beam inner plate.

[0033] In addition, the flange portion of the battery pack is in close contact with the bottom surface of the lower plate portion of the side sill inner panel. The battery fastening bolt is inserted from the flange portion into the internal thread portion of the battery mounting pipe and fastened to the internal thread portion.

[0034] As described above, the present invention solves the above-mentioned problems, thereby providing the following effects.

[0035] First, multiple load support structures (lower beam inner patch, battery mounting tube, etc.) supporting the bottom of the lower beam inner reinforcement are installed on the lower beam inner plate to ensure that the lower beam inner reinforcement remains fixed in its original position. Therefore, in the event of a small overlap collision or a side collision, the pushing and moving of the lower beam inner reinforcement can be minimized. Therefore, the collision energy absorption performance due to the collision can be improved.

[0036] Second, compared with a conventional side sill inner reinforcement, the side sill inner reinforcement of the present invention can be applied to a structure with reduced cross-sectional area, volume and weight, thereby achieving weight reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and other objects, features and other advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:

[0038] Figure 1 is a perspective view of one example of a side portion of a vehicle body for a conventional electric vehicle;

[0039] Figure 2 is a schematic cross-sectional view of one example of a side portion of a vehicle body for a conventional electric vehicle;

[0040] Figure 3 is a schematic cross-sectional view of another example of a side portion of a vehicle body for a conventional electric vehicle;

[0041] Figure 4 is a perspective view of a device for reinforcing a side portion of a body of an electric vehicle according to one embodiment of the present invention;

[0042] Figure 5 is a side view of a main part of an apparatus for reinforcing a side portion of a body of an electric vehicle according to one embodiment of the present invention;

[0043] Figure 6 is a cross-sectional view of a portion in which a first lower side sill inner patch of an apparatus for reinforcing a side portion of an electric vehicle body according to one embodiment of the present invention is installed;

[0044] Figure 7 is a cross-sectional view of a portion in which a second lower side sill inner patch of an apparatus for reinforcing a side portion of an electric vehicle body according to one embodiment of the present invention is installed;

[0045] Figure 8 is a cross-sectional view of an example in which a battery pack according to an embodiment of the present invention is assembled in an apparatus for reinforcing a side portion of a body of an electric vehicle; and

[0046] Fig. 9 is a cross-sectional view of a shock absorbing operation of an apparatus for reinforcing a side portion of a body of an electric vehicle according to one embodiment of the present invention. DETAILED DESCRIPTION

[0047] The specific structure and function description described in the embodiments of the present invention are merely exemplified for the purpose of illustrating the embodiments according to the concept of the present invention. The embodiments according to the concept of the present invention can be implemented in various forms. In addition, the inventive concept should not be interpreted as being limited by the embodiments described in the present invention, and should be understood as being included in all modifications, equivalents or substitutes within its spirit and technical scope.

[0048] In the present invention, terms such as first and / or second may be used to describe various components, but these components are not limited by these terms. The above terms are only used to distinguish one component from other components. For example, within the scope of the rights of the concept according to the present invention, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component.

[0049] In the present invention, it should be understood that when a component is referred to as being "coupled" or "connected" to another component, it may be directly coupled or connected to the other component, but other components may exist between the two. On the other hand, when a component is referred to as being "directly coupled" or "directly connected" to another component, it should be understood that no other components exist between the two. Other expressions used to describe the relationship between each component, such as "between" and "directly between" or "adjacent" and "directly adjacent", should also be interpreted similarly. When a component, device, element, etc. of the present invention is described as having a certain purpose or performing an operation, function, etc., the component, device or element should be regarded as "configured to" meet the purpose or perform the operation or function in this article.

[0050] Throughout the present invention, the same reference numerals refer to the same elements. The terms used in the present invention are used to describe embodiments and are not intended to limit the present invention. In the present invention, unless otherwise specified in a phrase, the singular form also includes the plural form. As used herein, "include" and / or "comprise" means that the parts, steps, operations and / or elements do not exclude the presence or addition of one or more other parts, steps, operations and / or elements.

[0051] Hereinafter, embodiments of the present invention are described in detail with reference to the accompanying drawings.

[0052] Figure 4 is a perspective view of a device for reinforcing a side portion of an electric vehicle body according to the present invention, and Figure 5 is a side view of a main portion of an apparatus for reinforcing a side portion of an electric vehicle body according to the present invention.

[0053] like Figure 4 As shown, the side sill inner panel 20 is joined to each of opposite sides of the seat cross member 10 supporting the interior floor of the vehicle by welding or the like. A side sill inner reinforcement 30 as a type of collision energy absorbing member is attached to the outer surface of the side sill inner panel 20.

[0054] The side sill inner reinforcement 30 is configured to absorb collision loads (collision energy) introduced during side collisions and small overlap collisions. Therefore, the side sill inner reinforcement 30 protects the vehicle interior space while preventing the battery pack disposed at the bottom of the side sill inner panel 20 from deforming.

[0055] Specifically, a plurality of side sill inner patches 100 and a plurality of battery mounting tubes 130 are installed between the lower plate portion 20 - 1 of the side sill inner panel 20 and the bottom of the side sill inner reinforcement 30 as a load supporting structure for supporting the side sill inner reinforcement 30 .

[0056] When the material of the side sill inner reinforcement 30 is the same steel material as the battery mounting tube 130, the upper end of the battery mounting tube 130 may be coupled to the bottom of the side sill inner reinforcement 30. In addition, the lower end of the battery mounting tube 130 may be coupled to the lower plate portion of the side sill inner panel 20.

[0057] Therefore, the battery mounting pipe 130 functions like a pillar of a building, thereby preventing the side sill inner reinforcement 30 from sagging due to its own weight.

[0058] When the material of the side sill inner reinforcement 30 is aluminum, which is different from the steel material used for the battery mounting tube 130 , the battery mounting tube 130 is coupled to the side sill inner patch 100 disposed between the side sill inner panel 20 and the side sill inner reinforcement 30 .

[0059] In other words, when the material of the lower side beam inner reinforcement 30 is aluminum different from the steel material used for the battery mounting tube 130, the upper end portion of the battery mounting tube 130 may be coupled to the upper support plate of the lower side beam inner patch 100 by welding or the like. The lower end portion of the battery mounting tube 130 may be coupled to the lower support plate of the lower side beam inner patch 100 by welding or the like.

[0060] The battery mounting pipe 130 may be provided in a structure having an internal thread portion 132 provided on an inner diameter portion thereof.

[0061] Therefore, when the lower end portion of the battery mounting tube 130 is coupled to the side sill inner reinforcement 30 or the side sill inner patch 100 , the internal thread portion 132 may be opened toward the bottom of the lower plate portion 20 - 1 of the side sill inner panel 20 and exposed.

[0062] The plurality of battery mounting tubes 130 installed between the lower plate portion 20-1 of the side sill inner panel 20 and the bottom of the side sill inner reinforcement 30 supports the weight (load) of the side sill inner reinforcement 30. In addition, the plurality of battery mounting tubes 130 perform functions such as preventing the side sill inner reinforcement 30 from sliding and suppressing its initial movement in the event of a side collision or a small overlap collision.

[0063] An upper end portion of the side sill inner patch 100 is coupled to the bottom of the side sill inner reinforcement 30 , and a lower end portion of the side sill inner patch 100 is coupled to a lower peripheral portion of the battery mounting tube 130 .

[0064] The lower longitudinal beam inner patch 100 is a support frame with different shapes and structures. The lower longitudinal beam inner patch 100 can be composed of a first lower longitudinal beam inner patch 110 and a second lower longitudinal beam inner patch 120 .

[0065] The first side sill inner patch 110 may be provided with a shape and structure that supports the bottom of the side sill inner reinforcement 30 together with each battery mounting tube 130. The second side sill inner patch 120 may be provided with a structure that not only supports the bottom of the side sill inner reinforcement 30 together with each battery mounting tube 130 but also covers a portion of the outer surface and upper surface of the side sill inner reinforcement 30.

[0066] like Figure 5 and 6 As shown, the first lower side beam inner patch 110 may include an upper support plate 111, which is bolted to the bottom of the lower side beam inner reinforcement 30 and welded to the upper end of the battery mounting tube 130. The upper support plate 111 is horizontally arranged at the lower position of the lower side beam inner reinforcement 30. The first lower side beam inner patch 110 may also include a lower support plate 113, which is welded to the lower periphery of the battery mounting tube 130 and horizontally arranged above the lower plate 20-1 of the lower side beam inner plate 20. In addition, the first lower side beam inner patch 110 may include a vertical support plate 112, which is integrally connected between the inner end of the upper support plate 111 and the inner end of the lower support plate 113, and is arranged to be parallel to the outer surface of the lower side beam inner plate 20 in the vertical direction.

[0067] like Figure 6 As shown in the dotted box in FIG. 1 , an annular cross-sectional space 160 is provided by the battery mounting tube 130, the vertical support plate 112 of the first lower longitudinal beam inner patch 110, a portion of the upper support plate 111, and a portion of the lower support plate 113. The annular cross-sectional space is used to assist in absorbing the load and collision energy caused by side collisions and small overlap collisions.

[0068] like Figure 5 and 7 As shown, the second lower longitudinal beam inner patch 120 may include an upper support plate 121, which is bolted to the bottom of the lower longitudinal beam inner reinforcement 30 and welded to the upper end of the battery mounting tube 130. The upper support plate 121 is horizontally arranged at the lower position of the lower longitudinal beam inner reinforcement 30. The second lower longitudinal beam inner patch 120 may also include a lower support plate 123, which is welded to the lower periphery of the battery mounting tube 130 and horizontally arranged above the lower plate 20-1 of the lower longitudinal beam inner plate 20. In addition, the second lower longitudinal beam inner patch 120 may include a vertical support plate 122, which is integrally connected between the inner end of the upper support plate 121 and the inner end of the lower support plate 123. The vertical support plate 122 is arranged to be parallel to the outer surface of the lower longitudinal beam inner plate 20 in the vertical direction.

[0069] In addition, if Figure 5 and 7 As shown, the second side sill inner patch 120 may further include a protection body 124, which is bent twice from the outer end of the upper support plate 121 and extends upward to cover the outer surface and a portion of the upper surface of the side sill inner reinforcement 30. In addition, the second side sill inner patch 120 may include an upper joining plate 125 extending from the upper end of the protection body 124 and joined to the upper end of the side sill inner plate 20 by welding or the like.

[0070] like Figure 7 As shown in the dotted box in FIG. 1 , an annular cross-sectional space 170 is provided by the battery mounting tube 130, the vertical support plate 122 of the second lower longitudinal beam inner patch 120, a portion of the upper support plate 121, and a portion of the lower support plate 123. The annular cross-sectional space is used to assist in absorbing the load and collision energy caused by side collisions and small overlap collisions.

[0071] The side sill inner patch 100 including the first and second side sill inner patches 110 and 120 is located between the bottom of the side sill inner reinforcement 30 and the lower periphery of each battery mounting tube 130. The battery mounting tube 130 supports the weight (load) of the side sill inner reinforcement 30, and in the event of a side collision or a small overlap collision, assists in absorbing collision energy while deforming.

[0072] The inner surface of the side sill inner panel 20 and the outer surface of the side sill inner reinforcement 30 are bonded together using an adhesive or a tape 140 .

[0073] Accordingly, the side sill inner reinforcement 30 and the side sill inner panel 20 are surface-bonded to each other by / using an adhesive or tape 140. Therefore, the side sill inner reinforcement 30 can be prevented from sagging, moving, and deforming due to its own weight.

[0074] In detail, the side sill inner reinforcement 30 is supported by a plurality of side sill inner patches 100, a battery mounting tube 130, etc., while being allowed to adhere to the side sill inner panel 20 using an adhesive or tape 140. Therefore, effects such as preventing the side sill inner reinforcement 30 from sagging due to its own weight, preventing vibration due to vehicle body vibration and external force, and preventing noise due to shaking can be achieved.

[0075] Figure 8 is a cross-sectional view of an example in which a battery pack is assembled into the apparatus for reinforcing the side of the body of an electric vehicle according to the present invention.

[0076] The battery mounting tube 130 is a hardware component for fixing the battery pack 150 disposed in the bottom space of the seat cross member 10. As described above, when the lower end portion of the battery mounting tube 130 is coupled to the lower plate portion 20-1 of the side sill inner panel 20, the internal thread portion 132 disposed on the inner diameter portion of the battery mounting tube 130 may be opened and exposed toward the lower side of the lower plate portion 20-1 of the side sill inner panel 20 so as to mount the battery pack 150.

[0077] Accordingly, if Figure 8 As shown, after the flange portion 152 of the battery pack 150 is brought into close contact with the bottom surface of the lower plate portion 20-1 of the side sill inner panel 20, the battery fastening bolt 154 is inserted from the flange portion 152 into the internal thread portion 132 of the battery mounting tube 130 and fastened thereto. Therefore, the battery pack 150 can be placed in the bottom space of the seat cross member 10 in a firmly fixed state.

[0078] On the outer surface of the side sill inner reinforcement 30 , a side sill outer panel that covers and protects the side sill inner reinforcement 30 is joined to the inner surface of the side sill inner panel 20 by welding or the like.

[0079] The process of supporting the load and absorbing the collision energy by the side reinforcement of the electric vehicle body constructed as described above is as follows.

[0080] The battery mounting tube 130 plays a role in supporting the load of the side sill inner reinforcement 30 , similar to the role of a pillar in a building, and prevents the side sill inner reinforcement 30 from sagging.

[0081] The side sill inner patch 100 including the first and second side sill inner patches 110 and 120 also plays a role in supporting the load of the side sill inner reinforcement 30 together with the battery mounting tube 130. Therefore, the side sill inner patch 100 prevents the side sill inner reinforcement 30 from sagging, moving, and deforming.

[0082] In particular, if Figure 6 As shown in the dotted box in FIG, an annular cross-sectional space is formed by the battery mounting tube 130, the vertical support plate 112 of the first lower longitudinal beam inner patch 110, and a portion of the upper support plate 111. Therefore, the annular cross-sectional space is used to assist in absorbing the load and collision energy caused by side collisions and small overlap collisions.

[0083] In addition, if Figure 7 As shown in the dotted box in FIG. 1 , an annular cross-sectional space is formed by the battery mounting tube 130, the vertical support plate 122 of the second lower longitudinal beam inner patch 120, a portion of the upper support plate 121, and a portion of the lower support plate 123. Therefore, the annular cross-sectional space is used to assist in absorbing the load and collision energy caused by side collisions and small overlap collisions.

[0084] Therefore, the side sill inner reinforcement 30 is mainly used to absorb the load and collision energy caused by the collision, and the annular cross-sectional space formed by the battery mounting tube 130, the vertical support plate 122 of the second side sill inner patch 120, a part of the upper support plate 121 and a part of the lower support plate 123 is used to assist in absorbing the load and collision energy caused by the collision. Accordingly, the pushing and deformation movement of the side sill inner reinforcement 30 caused by the load and collision energy in the side collision and the small overlap collision can be minimized.

[0085] like Fig. 9 As shown, due to the load and collision energy from the side collision and the small overlap collision, the lower side sill inner reinforcement 30 undergoes a rotation behavior (based on Fig. 9 Direction shown is counter-clockwise).

[0086] The annular cross-sectional space ( Figure 7 The portion shown in the dashed box in the middle) is used together with the battery mounting tube 130 to suppress the initial rotation behavior of the lower side sill inner reinforcement 30 in the case of a side collision or a small overlap collision. Accordingly, the stable deformation of the lower side sill inner reinforcement 30 can be induced to absorb the collision energy.

[0087] Although the present invention has been described in detail through the above embodiments, the right scope of the present invention is not limited to the above embodiments. Various modifications and improvements made by ordinary technicians in this field using the basic concept of the present invention as defined in the appended claims are also within the right scope of the present invention.

Claims

1. A device for reinforcing the side of an electric vehicle body, the device comprising: a lower longitudinal sill inner panel configured to be bonded to opposite sides of the seat cross member; a side sill inner reinforcement configured to be attached to an outer surface of the side sill inner panel; as well as Battery mounting tube, including: an upper portion configured to be bonded to a bottom portion of the inner reinforcement member of the side sill, and The lower portion is configured to be coupled to a lower plate portion of the side sill inner panel.

2. The device according to claim 1, further comprising a lower longitudinal beam inner patch, in, The lower longitudinal beam inner patch comprises: an upper portion configured to be bonded to a bottom portion of the inner reinforcement member of the side sill, and The lower portion is configured to be coupled to a lower peripheral portion of the battery mounting tube.

3. The device according to claim 2, wherein: The side sill inner patch includes a first side sill inner patch provided in a structure configured to support a bottom of the side sill inner reinforcement together with the battery mounting tube.

4. The device according to claim 2, wherein: The lower beam inner patch also includes a second lower beam inner patch, which is configured to cover a portion of the outer surface and the upper surface of the lower beam inner reinforcement, wherein the second lower beam inner patch and the battery mounting tube are configured to form a structure that supports the bottom of the lower beam inner reinforcement.

5. The device according to claim 3, wherein: The first lower longitudinal beam inner patch comprises: an upper support plate configured to be fastened to the bottom of the lower side sill inner reinforcement with bolts and to be welded to the upper end of the battery mounting tube; a lower support plate configured to be welded to a lower periphery of the battery mounting tube; and The vertical support plate is configured to be integrally connected between the inner end of the upper support plate and the inner end of the lower support plate, and is arranged to be parallel to the outer surface of the lower longitudinal beam inner plate in the vertical direction.

6. The device according to claim 5, wherein: An annular cross-sectional space for assisting in absorbing collision energy is formed by the battery mounting tube, the vertical support plate of the first side sill inner patch, a portion of the upper support plate of the first side sill inner patch, and a portion of the lower support plate of the first side sill inner patch.

7. The device according to claim 4, wherein: The second lower longitudinal beam inner patch comprises: an upper support plate configured to be fastened to the bottom of the lower side sill inner reinforcement with bolts and to be welded to the upper end of the battery mounting tube; a lower support plate configured to be welded to a lower peripheral portion of the battery mounting tube; a vertical support plate, configured to be integrally connected between the inner end of the upper support plate and the inner end of the lower support plate, and arranged to be parallel to the outer surface of the lower longitudinal beam inner plate in the vertical direction; a protection body configured to be bent twice from an outer end portion of the upper support plate and extend upward to cover a portion of an outer surface and an upper surface of the lower side sill inner reinforcement; and An upper joining plate extends from an upper end portion of the protection body and is joined to an upper end portion of the side sill inner panel by welding.

8. The device according to claim 7, wherein: An annular cross-sectional space for assisting in absorbing collision energy is formed by the battery mounting tube, the vertical support plate of the second side sill inner patch, a portion of the upper support plate of the second side sill inner patch, and a portion of the lower support plate of the second side sill inner patch.

9. The device according to claim 1, wherein: The outer surface of the side sill inner reinforcement and the inner surface of the side sill inner panel are bonded together using an adhesive or a tape.

10. The device according to claim 1, wherein: The battery mounting tube includes an inner diameter portion formed with an internal thread portion.

11. The device according to claim 10, wherein: When the lower end portion of the battery mounting tube is coupled to the lower plate portion of the side sill inner panel, the internal thread portion is exposed below the lower plate portion of the side sill inner panel.

12. The device according to claim 11, wherein The flange portion of the battery pack is in close contact with the bottom surface of the lower plate portion of the side sill inner panel, and the battery fastening bolt is inserted from the flange portion into the internal thread portion of the battery mounting tube and fastened to the internal thread portion.

Images