Electric vehicle frame

Abstract

The present invention relates to a frame for an electric vehicle, and the frame for an electric vehicle according to one embodiment of the present invention includes a side frame that defines a battery space in which a battery is located, is located around a portion of the battery space, has a first hollow portion with a closed cross section inside, and extends in a first direction, which is the length direction of the vehicle, and a reinforcing frame that is located in the first hollow portion and has at least a portion that contacts the side frame, and the reinforcing frame includes a first surface that is parallel to a second direction, which is the height direction of the vehicle, and a second surface that extends from the first surface and is formed to abut against a portion of the side frame, and the second surface may be provided with a convex portion protruding in the second direction and a concave portion that is recessed.

Description

[Technical Field]

[0001] The present invention relates to a frame for an electric vehicle, and more particularly to a frame for a body-on-frame type electric vehicle in which a reinforcing frame is located inside a side frame. [Background technology]

[0002] One type of vehicle structure is the body-on-frame structure, in which the body is assembled on a frame and can be separated from the frame. Body-on-frame structures are generally used in vehicles such as SUVs, trucks, and buses. Body-on-frame structures are primarily used in vehicles that require high load resistance and traction.

[0003] When a body-on-frame structure is used in an electric vehicle, the most important role of the frame in a conventional internal combustion engine vehicle is to support the entire vehicle load, provide rigidity, and protect passengers in the event of an external collision, but in an electric vehicle, protecting the battery is also a very important purpose.In addition, the battery is located on the bottom, occupies a large volume, and is heavy.

[0004] Therefore, with a body-on-frame structure like that used for conventional internal combustion engines, the weight increases when a large-capacity battery is installed, making it difficult to provide protection against collisions.

[0005] In addition, some automobiles use aluminum extrusions or the like as reinforcement materials in the interior space of the frame, but this is expensive and environmentally undesirable.

[0006] Therefore, there is a need for a frame structure for an electric vehicle that solves the above problems. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Korean Patent Publication No. 10-2022-0122089 (Published September 2, 2022) Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention is intended to solve the above problems, and aims to provide a body-on-frame type frame structure for electric vehicles that has excellent impact absorption capabilities in the event of a side impact. [Means for solving the problem]

[0009] In order to achieve the above object, the present invention provides a frame for an electric vehicle formed as follows.

[0010] According to one embodiment of the present invention, a frame for an electric vehicle includes a side frame that defines a battery space in which a battery is located, is located around the battery space, has a first hollow portion with a closed cross section inside, and extends in a first direction, which is the length direction of the vehicle, and a reinforcement frame that is located in the first hollow portion and has at least a portion that contacts the side frame, and the reinforcement frame includes a first surface that is parallel to a second direction, which is the height direction of the vehicle, and a second surface that extends from the first surface and is formed to abut against a portion of the side frame, and the second surface is provided with a convex portion protruding in the second direction and a concave portion that is recessed.

[0011] The reinforcing frame may extend in the first direction.

[0012] The convex portions and the concave portions may alternately repeat in the first direction to form a waveform.

[0013] The vehicle may further include a side seal located on one side of the side frame in the second direction, with a second hollow portion having a closed cross section extending in the first direction, and a reinforcing frame having a bent or curved shape, located in the second hollow portion, and continuing in the first direction.

[0014] The angle at the portion where the first surface and the second surface are connected may be an obtuse angle.

[0015] The second surfaces may be formed on both ends of the first surface in the second direction, and the reinforcing frame may be symmetrical with respect to a third direction, which is a width direction of the vehicle.

[0016] The reinforcing frame may further include a flange that is parallel to the first surface and extends from the second surface, and the flange may be welded to the side frame.

[0017] In addition, the side frame may include a first side frame adjacent to the battery space and a second side frame adjacent to the side seal, and may be formed by joining the first side frame and the second side frame together, and the first surface may be in at least partial contact with the second side frame, and may be welded or joined at the contacting portion with an adhesive.

[0018] The side frames may also be made of aluminum or steel.

[0019] The side frame and the reinforcing frame may be made of different materials.

[0020] The reinforcing frame may be formed by bending a single plate material.

[0021] The plate material may be a steel material having a tensile strength of 980 MPa or more.

[0022] Another embodiment of the present invention includes a side frame defining a battery space in which a battery is located, positioned at a portion around the battery space, including a first hollow portion with a closed cross section therein and extending in a first direction, which is the length direction of the vehicle; a reinforcing frame positioned in the first hollow portion and including a surface formed in a second direction, which is the width direction of the vehicle; and a side seal positioned on one side of the side frame in the second direction, including a second hollow portion with a closed cross section therein extending in the first direction, wherein the reinforcing frame includes a first surface parallel to the second direction, which is the height direction of the vehicle, and a second surface extending from the first surface and formed to abut against a portion of the side frame, and the angle at the portion where the first surface and the second surface are connected is an obtuse angle. [Effects of the Invention]

[0023] With the above-described structure, the present invention can provide a frame structure that has excellent shock absorption capability against external collisions and is strong enough to withstand the weight of the vehicle itself.

[0024] Furthermore, when a material such as steel is used as the reinforcing material instead of aluminum, there is an advantage that the manufacturing cost is reasonable. [Brief explanation of the drawings]

[0025] [Figure 1] Schematic exploded view of a body-on-frame electric vehicle. [Figure 2] 2 is a cross-sectional view of the portion indicated by AA' in FIG. 1 of the frame structure for an electric vehicle according to one embodiment of the present invention. [Figure 3a] FIG. 2 is a partial perspective view of a side frame and a reinforcing frame according to an embodiment of the present invention. [Figure 3b] 3 is a cross-sectional view of a side frame and a reinforcing frame according to one embodiment of the present invention. FIG. [Figure 4] 1 is a perspective view of a reinforcing frame according to one embodiment of the present invention; [Figure 5] FIG. 2 is a perspective view of a side seal according to an embodiment of the present invention. [Figure 6]FIG. 10 is a perspective view of a side seal according to another embodiment of the present invention. [Figure 7] FIG. 10 is a perspective view of a side seal according to another embodiment of the present invention. [Figure 8] 2 is a cross-sectional view of a portion indicated by AA' in FIG. 1 of a frame structure for an electric vehicle according to another embodiment of the present invention. [Figure 9] FIG. 2 is a partial perspective view of a side frame and a reinforcing frame according to an embodiment of the present invention. [Figure 10] FIG. 10 is a perspective view of a reinforcing frame according to another embodiment of the present invention. [Figure 11] FIG. 10 is a partial perspective view of a conventional side frame. [Figure 12] 10 is a graph showing force and displacement related to support strength, comparing a conventional side frame and a reinforcing frame with a side frame and a reinforcing frame according to an embodiment of the present invention through simulation when an external impact is applied to the frame. DETAILED DESCRIPTION OF THE INVENTION

[0026] Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. However, the concept of the present invention is not limited to the embodiments shown, and a person skilled in the art who understands the concept of the present invention can easily propose other regressive inventions or other embodiments within the concept of the present invention by adding, changing, or deleting other components within the scope of the same concept, and these can also be said to be included within the concept of the present invention.

[0027] Figure 1 shows a schematic diagram of the structure of an electric vehicle, which has a body-on-frame structure.

[0028] An electric vehicle with a body-on-frame structure is constructed by assembling a frame 1 and a body 3 on the frame. Also, since it is an electric vehicle, a battery 2 is located inside the frame 1, occupying a large area.

[0029] 2 to 7 show a frame for an electric vehicle according to one embodiment of the present invention.

[0030] Figure 2 is a cross-sectional view showing an electric vehicle frame structure according to one embodiment of the present invention, showing a cross-section of the A-A' portion when the electric vehicle body, frame, and battery are assembled in Figure 1. Figure 3a is a partial perspective view of a side frame and a reinforcing frame according to one embodiment of the present invention, Figure 3b is a cross-sectional view of a side frame and a reinforcing frame according to one embodiment of the present invention, and Figure 4 is a perspective view of a reinforcing frame according to one embodiment of the present invention. Figures 5 to 7 are perspective views of a side seal and a reinforcing frame according to one embodiment of the present invention.

[0031] The frame for an electric vehicle according to one embodiment of the present invention includes a side frame 10 and a reinforcing frame 20 .

[0032] A battery space S in which the battery is located can be defined. In Figure 2, the space in which the battery is located is not shown in a specific form, but is arbitrarily shown to indicate the location where it exists.

[0033] The side frame 10 may be located around a portion of the battery space S, include a first hollow portion 13 with a closed cross section therein, and extend in a first direction, which is the length direction (Y direction) of the vehicle.

[0034] The side frame 10 may extend in a first direction, which is the vehicle length direction of the battery space S, from a portion around the battery space S. In addition, the cross-sectional shape of the side frame 10 in the third direction, which is the vehicle width direction (X direction), may be a closed cross-section, and a first hollow portion 13 may be formed inside. As an example, the cross-sectional shape may be polygonal, and the corners may be curved. However, it is not limited to the above-mentioned shape.

[0035] For example, the side frame 10 may include a first side frame 11 adjacent to the battery space S and a second side frame 12 adjacent to the side seal 30, and the first side frame 11 and the second side frame 12 may be joined together to form an integral unit. The joining may be by welding, forming a first joint W1. Being formed as described above may provide convenience in manufacturing.

[0036] For example, the side frame 10 may be made of aluminum or steel. To ensure the weight and support strength required for use in an electric vehicle, the side frame 10 may be made of aluminum and steel. Steel is advantageous in terms of cost. However, the material of the side frame 10 is not limited to the above-mentioned materials, and may include any material that would be obvious to a person of ordinary skill in the art.

[0037] The reinforcing frame 20 is located in the first hollow portion 13 and may be in contact with the side frame 10 at least partially.

[0038] As an example, the reinforcing frame 20 includes a first surface 21 parallel to a second direction, which is the height direction (Z direction) of the vehicle, and a second surface 22 extending from the first surface 21 and formed to abut against a portion of the side frame 10, and the second surface 22 may be provided with a convex portion 23a protruding in the second direction and a recessed portion 23c.

[0039] The strengthening frame 20 may also extend in the first direction.

[0040] The reinforcing frame 20 is located in the first hollow portion 13 located inside the side frame 10, and is configured to minimize deformation of the side frame 10 and the battery space S located therein when an impact from outside the vehicle occurs. The provision of the reinforcing frame 20 in addition to the side frame 10 provides the effect of excellent energy absorption capability due to external impact. Like the side frame 10, the reinforcing frame 20 extends in the first direction, and the overall energy absorption effect in the first direction in which the side frame 10 is formed is increased.

[0041] The vehicle body is formed to include a first surface 21 parallel to the vehicle height direction and a second surface 22 extending from the first surface 21, and protrusions 23a and recesses 23c may be provided on the second surface 22. The protrusions 23a and recesses 23c may be formed repeatedly.

[0042] As an example, the convex portions 23a and the concave portions 23c may alternately repeat in the first direction to form a waveform. Specifically, the waveform may be a right-angled shape such as a right-angled wave, a curved shape such as a sine wave, or a sawtooth wave. In a shape such as a right-angled wave, the convex portions 23a and the concave portions 23c form parallel portions, while in a shape such as a sine wave, the convex portions 23a and the concave portions 23c form lines rather than surfaces, and the boundaries between the convex portions 23a and the concave portions 23c are not clearly defined. Furthermore, in a shape such as a sawtooth wave, the convex portions 23a and the concave portions 23c form lines rather than surfaces, and the boundaries between the concave portions 23c and the convex portions 23a are clearly defined. However, the waveform is not limited to a specific shape.

[0043] A height portion 23b that connects the protrusion 23a and the recess 23c may be formed between the protrusion 23a and the recess 23c, and the shape of the height portion 23b is not limited. The larger the height portion 23b, the more effective it is, but this can be changed depending on the material and processing method.

[0044] As an example, the convex portions 23 a and the concave portions 23 c are formed in a partial area or the entire area of ​​the second surface 22 of the strengthening frame 20 .

[0045] As an example, the protrusions 23a and the recesses 23c may be beads formed by beading, and the bead portion 23 may include the protrusions 23a, the recesses 23c, and the height portions 23c. Beading is inexpensive, and in the case of a plate material, it is easy to manufacture because it can be formed over a relatively large area in one process.

[0046] Since the convex portions 23a and the concave portions 23c are formed on the second surface 22, there is provided an effect that when an impact is applied in the first direction, the impact is absorbed even more.

[0047] The reinforcing frame 20 may be formed by bending a single plate material. Forming the reinforcing frame 20 by bending a single plate material facilitates processing and minimizes the number of joints, thereby preventing problems such as separation due to impact. The plate material constituting the reinforcing frame 20 may be a steel material having a tensile strength of 980 MPa or more. In order to have sufficient absorption capacity against external impact, the reinforcing frame 20 can be formed of a steel material having a tensile strength of 980 MPa or more. However, the material and processing method are not limited to those described above.

[0048] For example, the side frame 10 and the reinforcing frame 20 may be formed of different materials. The side frame 10 and the reinforcing frame 20 may be formed of aluminum or steel, or may be formed by processing different materials. The main purpose of the side frame 10 is to provide support during a collision, while the reinforcing frame 20 is required to have the ability to absorb energy in addition to providing support during a collision. Therefore, when the side frame 10 and the reinforcing frame 20 are formed of different materials, it is possible to provide an advantage that a dual design can be used to meet different required characteristics.

[0049] However, the side frame 10 and the reinforcing frame 20 may be made of the same material, and are not limited to being made of different materials.

[0050] As an example, the reinforcing frame 20 may be parallel to the first surface 21 and further include a flange 24 extending from the second surface 22, and may be welded to the side frame 10 at the flange 24.

[0051] When the flange 24 is formed to fix the reinforcing frame 20 and the side frame 10, the fixation is by surface contact, which provides the effect of providing a more stable fixation compared to when there is no flange 24. Also, the second joint W2 may be formed by welding.

[0052] When the reinforcing frame 20 is formed by integrally processing and molding a plate material, the flange 24 may also be integrally formed by bending the plate material. However, the shape and processing method of the flange 24 are not limited to the above example.

[0053] Furthermore, the first surface 21 may be in contact with at least a portion of the second side frame 12, and the contacting portion may be welded or joined with an adhesive.

[0054] The first surface 21 has at least a portion in contact with the second side frame 12 to directly absorb an external impact and quickly disperse the impact transmitted through the second side frame 12. The third joint W3 may also be formed by joining the first surface 21 by welding or with an adhesive.

[0055] According to one embodiment of the present invention, the angle θ at the connection between the first surface 21 and the second surface 22 may be an obtuse angle, i.e., may have a value between 90 degrees and 180 degrees.

[0056] The angle of the reinforcing frame 20 where the first surface 21 and the second surface 22 are connected may be an obtuse angle. When the angle is an obtuse angle, the reinforcing frame 20 can be set to have a larger area than when the angle is a right angle, and when formed in this way, it has the effect of increasing the area that absorbs external shocks.

[0057] The second surfaces 22 may be formed on both ends of the first surface 21 in the second direction, and the reinforcing frame 20 may be symmetrical with respect to the third direction, which is the width direction of the vehicle.

[0058] For stable energy absorption, the second surface 22 may be formed on both ends of the first surface 21, and the reinforcing frames 20 may be formed symmetrically with respect to each other with respect to the third direction in order to uniformly disperse energy.

[0059] The frame for an electric vehicle according to one embodiment of the present invention may further include a side seal 30 and a reinforcing frame 40 .

[0060] The side seal 30 may be located on one side of the side frame 10 in the third direction, and may have a second hollow portion 33 with a closed cross section formed therein and extending in the first direction.

[0061] The reinforcing frame 40 may include a folded or bent shape and may be located in the second hollow portion 33 and continue in the first direction.

[0062] The side seal 30 is a portion located on the body 3 (see FIG. 1), and may be located on one side of the side frame 10 in the third direction. As an example, it may be located closer to the outside of the vehicle in the third direction of the side frame 10. In other words, when viewed from the overall structure of the vehicle, the battery 2 (see FIG. 1) may be located at the innermost position in the third direction, followed by the side frame 10, and then the side seal 30. The side seal 30 may have a closed cross section therein, and a second hollow portion 33 may be formed. Furthermore, such a cross-sectional shape extends in the first direction.

[0063] As an example, the closed cross section may be a polygon, but is not limited to this, and may be a circular pipe shape, or a complex cross section having multiple closed cross sections.

[0064] Also, a reinforcing frame 40 including a bent or curved shape may be positioned in the second hollow portion 33. As an example, the reinforcing frame 40 may be configured to include a first reinforcing portion 41 and a second reinforcing portion 42, but is not limited thereto, and may include any shape, material, etc. that is positioned in the second hollow portion 33 and helps protect the battery and occupant from external forces in the second direction.

[0065] Furthermore, the side seal 30 is joined together with the reinforcing frame 40, which can provide the effect of absorbing energy more effectively against impacts in the third direction.

[0066] The side seal 30 may include a first side seal 31, a second side seal 32 joined to the first side seal 31 to form a second hollow portion 33 together with the first side seal 31, and a first side seal flange 34 and a second side seal flange 35 where the first side seal 31 and the second side seal 32 are joined.

[0067] The reinforcing frame 40 has a bent or curved shape, is positioned in the second hollow portion 33 , continues in the first direction, and is formed so that at least a portion thereof abuts against the first side seal 31 .

[0068] 5, a first reinforcing portion 41 and a second reinforcing portion 42 may be formed, the first reinforcing portion 41 being disposed in the second hollow portion 33 and having one side joined to the first side seal 31 to form a first closed cross section. By joining the first side seal 31 to form the first closed cross section, the mechanical rigidity of the vehicle side seal 30 can be improved.

[0069] The first reinforcing portion 41 may include a first upper portion, a pair of first side portions, and a pair of first lower flanges 43.

[0070] The first upper portion may have first side portions connected to both ends in the height direction. The first upper portion may have an uneven shape in the first direction. Protruding surfaces P1 and inward surfaces P2 may be alternately formed in the first direction, and an inclined surface P3 may be formed between the protruding surfaces P1 and the inward surfaces P2.

[0071] The first side surface portion may extend from the first upper portion and may be provided so as to abut against the inner surface of the first side seal 31. The first reinforcing portion 41 may also be bent and formed so that the first side surface portion and the first lower flange 43 intersect with each other.

[0072] The first lower flange 43 may be joined to the inner surface of the first side seal 31 .

[0073] The second reinforcing portion 42 may be disposed in the second hollow portion 33, and one side may be joined to the first reinforcing portion 41 to form the second closed cross section. By joining one side of the second reinforcing portion 42 to the first reinforcing portion 41 to form the second closed cross section, the mechanical rigidity of the vehicle side seal 30 can be improved.

[0074] The second reinforcing portion 42 may include a second upper portion, a pair of second side portions, and a pair of second lower flanges.

[0075] The second upper portion may have an uneven shape in the first direction. Protruding surfaces P1 and recessed surfaces P2 may be alternately formed in the first direction, with an inclined surface P3 formed between the protruding surfaces P1 and the recessed surfaces P2. The second upper portion may be flat. This improves the adhesive strength of the second upper portion when an adhesive or the like is applied to the second upper portion for bonding to the second side seal 32, thereby improving the convenience of the bonding and assembly operations.

[0076] The second upper portion may have second side portions connected to both ends in the height direction.

[0077] The second side portion may extend from the second upper portion and in a second direction to the first side seal 31. The second lower flange of the second reinforcing portion 42 may be joined to the first side portion of the first reinforcing portion 41.

[0078] A fitting portion 44 may be formed where the first reinforcement portion 41 and the second reinforcement portion 42 are fitted and joined to each other.

[0079] As an example, the first reinforcement portion 41 and the second reinforcement portion 42 may have the uneven portion P formed continuously over the entire side seal 30 in the first direction.

[0080] By including the uneven portion P, the rigidity can be improved without increasing the thickness of the material such as steel that constitutes the first reinforcement portion 41 and the second reinforcement portion .

[0081] As another example, referring to FIG. 6 , in addition to the first reinforcement portion 41 and the second reinforcement portion 42, a diaphragm portion 45 may be further included. When the diaphragm portion 45 is formed, it divides the second hollow portion 33 to form the second-first hollow portion 33a and the second-second hollow portion 33b, allowing the first side seal 31 and the second side seal 32 to stably undergo compressive deformation upon an external impact in the third direction. This further improves the energy absorption capacity due to collision energy. The diaphragm portion 45 may be positioned so as to contact the first upper portion of the first reinforcement portion 41 and the second lower flange 43b of the second reinforcement portion 42. A curved shape in the second direction may also be added from the center portion. This curved shape is advantageous for crushing deformation upon impact.

[0082] 7, the first reinforcement portion 41 and the second reinforcement portion 42 may be formed symmetrically across the diaphragm portion 45. Therefore, the first lower flange 43a of the first reinforcement portion 41 and the second lower flange 43b of the second reinforcement portion 42 are formed in contact with the diaphragm portion 45.

[0083] The shape and structure of the reinforcing frame 40 are merely examples and are not limited to the above examples.

[0084] Hereinafter, the same configuration as the above embodiment will be referred to unless there are particular differences.

[0085] 8 to 10 show a frame for an electric vehicle according to another embodiment of the present invention.

[0086] FIG. 8 is a cross-sectional view of the portion indicated by A-A' in FIG. 1 of a frame structure for an electric vehicle according to another embodiment of the present invention, FIG. 9 is a partial perspective view of a side frame and a reinforcing frame according to one embodiment of the present invention, and FIG. 10 is a perspective view of a reinforcing frame according to another embodiment of the present invention.

[0087] According to another embodiment of the present invention, a battery space S in which a battery is located is defined, and the side frame 10 is located at a portion around the battery space S, includes a first hollow portion 13 with a closed cross section therein, and extends in a first direction, which is the longitudinal direction of the vehicle; a reinforcing frame 20 is located in the first hollow portion 13, and includes a surface formed in a second direction, which is the width direction of the vehicle; and a side seal 30 is located on one side of the side frame 10 in the second direction, and includes a second hollow portion 33 with a closed cross section therein extending in the first direction, and the reinforcing frame 20 includes a first surface 21 parallel to the second direction, which is the height direction of the vehicle, and a second surface 22 extending from the first surface 21 and formed to abut against a portion of the side frame 10, and the angle θ at the portion where the first surface 21 and the second surface 22 are connected may be an obtuse angle.

[0088] Fig. 11 shows the structure of a conventional side frame, and Fig. 12 is a graph showing the amount of deformation due to an impact in one embodiment of the present invention and the conventional side frame structure. Specifically, the graph compares the combined structures of the side frame and reinforcing frame of the first embodiment (Fig. 3a) and the second embodiment (Fig. 9) with the conventional side frame (Fig. 11).

[0089] The conventional side frame 10 has the same shape as the side frame 10 of the present invention. In the structure of the reinforcing frame 200, the angle γ of the reinforcing frame 200 is a right angle (90 degrees), and the recessed portion 23c and the protruding portion 23a are not formed. As an example, a first surface 210, a second surface 220, and a flange 240 are formed, and the angle γ between the first surface 210 and the second surface 220 is a right angle.

[0090] Compared to the present invention, the side frame 10 is relatively more likely to be deformed in a collision in the third direction, making it difficult to protect the battery and passengers of the electric vehicle.

[0091] The shapes of the conventional side frame 10 and reinforcing frame 200 are as shown in FIG. 11, and in FIG. 12, the results of the simulation for the conventional shapes are shown by thin solid lines without any special notation.

[0092] In the case of the present invention, the result value for the side frame 10 and the reinforcing frame 20 in the form shown in Fig. 3a is indicated by A, and the result value for the side frame 10 and the reinforcing frame 20 in the form shown in Fig. 9 is indicated by C. These are result values ​​interpreted based on the shapes shown in each figure.

[0093] The total weight of the conventional side frame 10 and the reinforcing frame 200 is the same as the weight of the side frame 10 and the reinforcing frame 20 according to each embodiment of the present invention. To achieve this, the thicknesses of the side frame 10 and the reinforcing frame 20 are adjusted.

[0094] The support strength can be compared based on the point where sudden deformation occurs. As a result, the result graph including the conventional reinforcement frame 200 shows that it can withstand an external impact of up to 352.2 KN, with a deformation of 44.6 mm.

[0095] Also, according to the result graph of the side frame 10 and the reinforcing frame 20 according to an embodiment of the present invention, it can be seen that the side frame 10 and the reinforcing frame 20 can withstand an external impact of up to 466.4 KN, with a deformation of 33.0 mm.

[0096] Furthermore, according to the result graph of the side frame 10 and the reinforcing frame 20 according to another embodiment of the present invention, it can be seen that the side frame 10 and the reinforcing frame 20 can withstand an external impact of up to 388.0 KN, with a deformation of 43.4 mm.

[0097] In both of the two embodiments, the support strength is stronger and the deformation is smaller than that of the conventional case. Therefore, it can be seen that the present invention has an even smaller deformation amount and can support even a larger force when subjected to an impact from the outside of the vehicle in the third direction.

[0098] That is, compared to the conventional side frame 10 and reinforcing frame 200 structures, the side frame 10 unit and reinforcing frame 20 of the present invention have higher energy absorption capacity, which increases support strength and reduces deformation, thereby providing a safe vehicle that protects passengers and the battery.

[0099] The present invention has been described above with reference to the preferred embodiments. However, the present invention is not limited to the above-described preferred embodiments, and it goes without saying that modifications can be made by those skilled in the art without changing the technical concept of the present invention as claimed in the claims. [Explanation of symbols]

[0100] 1 frame 2 Battery 3. Body S Battery space 10 Side frame 11 First side frame 12 Second side frame 13 1st hollow part 20 Reinforcement frame 21 Page 1 22 Side 2 23 Bead section 23a Convex part 23b Height 23c Recess 24 flange 30 Side seal 31 First side seal 32 Second side seal 33 Second hollow part 34 First seal flange 35 Second seal flange 40 Reinforced Frame 41 1st reinforcement section 42 2nd reinforcement part 43 Reinforced flange 44 Fitting part 45 Diaphragm part W1 1st joint W2 Second joint W3 3rd joint θ angle

Claims

1. A battery space in which the battery is located is defined; a side frame that is located around a portion of the battery space, includes a first hollow portion having a closed cross section therein, and extends in a first direction that is a longitudinal direction of the vehicle; a reinforcing frame located in the first hollow portion and at least a portion of which contacts the side frame; The reinforcing frame is a first surface parallel to a second direction that is a height direction of the vehicle; a second surface extending from the first surface and formed to abut against a portion of the side frame, The second surface has A frame for an electric vehicle, the frame being provided with a protruding portion protruding in the second direction and a recessed portion recessed in the second direction.

2. The frame for an electric vehicle according to claim 1 , wherein the reinforcing frame extends in the first direction.

3. The electric vehicle frame according to claim 2 , wherein the protrusions and the recesses alternately repeat in the first direction to form a wave shape.

4. a side seal located on one side of the side frame in the second direction, the side seal having a second hollow portion with a closed cross section extending in the first direction; The frame for an electric vehicle according to claim 1 , further comprising: a reinforcing frame having a folded or bent shape, positioned in the second hollow portion, and continuing in the first direction.

5. The electric vehicle frame according to claim 3 , wherein an angle at a portion where the first surface and the second surface are connected is an obtuse angle.

6. the second surfaces are formed on both ends of the first surface in the second direction, The frame for an electric vehicle according to claim 5 , wherein the reinforcing frame is symmetrical with respect to a third direction, which is a width direction of the vehicle.

7. The reinforcing frame is a flange extending from the second surface and parallel to the first surface; The frame for an electric vehicle according to claim 1 , wherein the flange is welded to the side frame.

8. The side frame is a first side frame adjacent to the battery space and a second side frame adjacent to the side seal; The first side frame and the second side frame are coupled together, The frame for an electric vehicle according to claim 4 , wherein the first surface is in contact with at least a portion of the second side frame, and the contacting portion is welded or joined with an adhesive.

9. The frame for an electric vehicle according to claim 1 , wherein the side frame is made of aluminum or steel.

10. The frame for an electric vehicle according to claim 9 , wherein the side frame and the reinforcing frame are formed of different materials.

11. 2. The frame for an electric vehicle according to claim 1, wherein the reinforcing frame is formed by bending a single plate material.

12. The plate material is 12. The electric vehicle frame according to claim 11, wherein the frame is made of a steel material having a tensile strength of 980 MPa or more.

13. A battery space in which the battery is located is defined; a side frame that is located around a portion of the battery space, includes a first hollow portion having a closed cross section therein, and extends in a first direction that is a longitudinal direction of the vehicle; a reinforcing frame located in the first hollow portion and including a surface formed in a second direction, which is a width direction of the vehicle; a side seal located on one side of the side frame in the second direction, the side seal having a second hollow portion with a closed cross section extending in the first direction therein; The reinforcing frame is a first surface parallel to a second direction that is a height direction of the vehicle; a second surface extending from the first surface and formed to abut against a portion of the side frame, The frame for an electric vehicle, wherein an angle at a portion where the first surface and the second surface are connected is an obtuse angle.

Images