A novel battery compartment structure that couples an arch bridge structure with biomimetic features

Abstract

This invention provides a novel battery compartment structure that couples an arch bridge structure with biomimetic elements, applicable to the field of battery compartment design technology. The structure includes a battery compartment cavity, two sets of biomimetic reinforcement structures, an impact-resistant structure, and a perforated structure. The two sets of biomimetic reinforcement structures are located on both sides of the battery compartment cavity, continuously connected by semicircular arcs, elliptical arcs, and transitional arcs to form lateral force paths. The impact-resistant structure is located below the battery compartment cavity, forming an isosceles triangle with blunted apex angles. The perforated structure is located above the battery compartment cavity and includes multiple arch-shaped perforations. These structures form a multi-directional load-distributing frame around the battery compartment cavity, dispersing top loads, lateral compression loads, and bottom impact loads, improving the overall protection capability of the battery compartment for the power battery pack, while also achieving lightweight design.

Description

Technical Field

[0001] This invention belongs to the field of battery compartment design technology, specifically relating to a novel battery compartment structure that combines a coupled arch bridge structure with biomimetic design. Background Technology

[0002] With the development of new energy vehicle technology, the proportion and structural importance of power battery systems in the vehicle are constantly increasing. Power batteries are usually located in the bottom area of ​​the vehicle. The battery compartment not only houses and fixes the battery modules, but also needs to withstand various loads from the vehicle body, road surface, and external environment during vehicle operation. Due to the limited space under the vehicle, the battery compartment must not only meet the requirements of battery layout, safety protection, and vehicle assembly, but also take into account multiple aspects such as lightweighting, structural strength, impact resistance, and service life. Therefore, its structural design has a significant impact on the safety and reliability of the entire vehicle.

[0003] Existing electric vehicle battery compartments or chassis battery support structures typically employ conventional structural forms such as flat plates, frame beams, reinforcing ribs, and bottom guard plates. While these structures are relatively easy to manufacture and assemble, they still have certain shortcomings under complex operating conditions. For example, when the top load is large, localized bending deformation or stress concentration can easily occur; when the vehicle's underside is subjected to road bumps, gravel impacts, or bottoming-out effects, the bottom structure is prone to localized impact concentration, which can affect the safety of the battery modules inside the battery compartment; under lateral collisions or crushing conditions, traditional sidewalls or single reinforcing rib structures have limited ability to diffuse lateral loads, making it difficult to sufficiently reduce the impact of lateral deformation on the battery modules.

[0004] Furthermore, some existing battery compartment structures are often improved by increasing the thickness of the sheet metal, adding reinforcing beams, or increasing the strength of the materials to enhance strength. However, this approach can easily lead to an increase in structural weight, which is detrimental to overall vehicle lightweighting and improved range performance. Additionally, there are usually localized connection points such as welds, bolts, and joint boundaries between the battery compartment and the chassis, brackets, or protective plates. Under impact, vibration, or compression, these areas may become weak points, affecting the continuity and reliability of the overall structure.

[0005] Existing technologies include some battery compartment improvement solutions that employ biomimetic structures, hollow weight-reduction structures, or partial protection structures. However, most solutions primarily optimize specific local performance, such as side reinforcement, bottom protection, or localized weight reduction, resulting in insufficient synergy between the overall structure. Under multi-directional loads, issues such as unreasonable load transfer paths, localized stress concentration, uneven protection effects, and the difficulty in balancing lightweight design with high protection performance may still exist. Therefore, there is still a need to further improve the overall load-bearing capacity and power battery protection capabilities of existing battery compartment structures under complex operating conditions. Summary of the Invention

[0006] In view of the above-mentioned problems in the prior art, the purpose of this invention is to provide a novel battery compartment structure that couples an arch bridge structure with biomimetic features. An arch bridge-shaped hollow structure, a continuous arc-shaped biomimetic reinforcement structure, and a passivated isosceles triangular impact-resistant structure are respectively set at the top, sides, and bottom of the battery compartment cavity. A multi-directional load diversion frame is formed around the battery compartment cavity, thereby taking into account top load bearing, lateral compression resistance, bottom impact resistance, and lightweight protection.

[0007] A novel battery compartment structure combining an arch bridge structure and biomimetic design includes a battery compartment cavity, two sets of biomimetic reinforcement structures, an impact-resistant structure, and a perforated structure. The battery compartment cavity is located in the middle of the battery compartment structure and is used to accommodate a power battery pack. The two sets of biomimetic reinforcement structures are respectively located on opposite sides of the battery compartment cavity. Each set of biomimetic reinforcement structures includes a semicircular arc in the middle, two elliptical arcs connecting the upper and lower ends of the semicircular arc, and two transition arcs connecting the outer ends of the two elliptical arcs. One transition arc smoothly connects to the top region of the battery compartment structure, and the other transition arc smoothly connects to the bottom region of the battery compartment structure, forming a continuous arc-shaped lateral force path on the side of the battery compartment cavity. The impact-resistant structure is located below the battery compartment cavity. The impact-resistant structure is generally an isosceles triangle, and the apex near the ground is rounded to form an arc-shaped contact area. The perforated structure is located above the battery compartment cavity and includes multiple spaced arch-shaped perforated holes. Among them, the hollow structure, two sets of biomimetic reinforcement structures and impact-resistant structures form a continuous multi-directional load diversion frame around the battery compartment cavity, so that the top load can be transferred to both sides through the hollow structure, the lateral compression load can be diffused to the top area and the impact-resistant structure through the biomimetic reinforcement structure, and the bottom impact load can be diffused to the biomimetic reinforcement structures on both sides through the impact-resistant structure.

[0008] Preferably, the ratio of the horizontal axis length to the vertical axis length of the elliptical arc is 5:4.

[0009] Preferably, the impact-resistant structure has an integrated wiring cavity inside for accommodating the vehicle wiring harness; the integrated wiring cavity extends along the length of the battery compartment structure, and the shape of the integrated wiring cavity is adapted to the outer contour of the impact-resistant structure.

[0010] Preferably, the ratio of the distance between the bottom inner wall of the integrated wire assembly cavity and the bottom outer wall of the impact-resistant structure to the distance between the top inner wall of the integrated wire assembly cavity and the bottom outer wall of the battery compartment cavity is 2:1.

[0011] Preferably, each arch-shaped perforation includes an upper arc-shaped structure and a lower horizontal straight structure, wherein the radius of the arc-shaped structure is 5 times the perforation height and the length of the horizontal straight structure is 6 times the perforation height.

[0012] Preferably, the apex angle of the isosceles triangular structure of the impact-resistant structure is greater than 150°.

[0013] Preferably, the hollow structure is filled with a lightweight filler, which is foamed aluminum, aerogel composite material, flame-retardant foam material or lightweight honeycomb core material.

[0014] Preferably, the impact-resistant structure has a scratch-resistant coating on the side closest to the ground, and the scratch-resistant coating is a wear-resistant polyurea coating, a flame-retardant rubber layer, or a wear-resistant epoxy coating.

[0015] Preferably, the main contour curve of the biomimetic reinforced structure includes an upper contour curve and a lower contour curve; The upper contour curve is represented in the local coordinate system as follows:

[0016] The lower contour curve is represented in the local coordinate system as follows:

[0017] The main contour curve of the biomimetic reinforced structure includes a semi-circular arc and an elliptical arc.

[0018] Preferably, the biomimetic prototype profile of the impact-resistant structure is approximately fitted by the following set of curve equations in the local coordinate system: .

[0019] The beneficial effects of this invention are: the coupled arch bridge structure and the novel biomimetic battery compartment structure, By arranging the hollow structure, biomimetic reinforcement structures on both sides, and impact-resistant structure around the battery compartment cavity as a whole, the battery compartment no longer relies solely on the thickness of local plates or a single reinforcing rib to bear external loads. Instead, a continuous multi-directional load-distribution frame is formed at the top, sides, and bottom of the battery compartment cavity. Therefore, when the battery compartment is subjected to top loads, lateral compression, or bottom impacts, the load can be diffused and transferred along different structural paths, which helps reduce local stress concentration around the battery compartment cavity and reduces the risk of the power battery pack being directly compressed or impacted.

[0020] Furthermore, biomimetic reinforcement structures are installed on both sides of the battery compartment cavity. Each set of biomimetic reinforcement structures is formed by the continuous connection of a semi-circular arc, two elliptical arcs, and two transitional circular arcs. This continuous arc-shaped structure can form a smoother force path under lateral loads, allowing the lateral compressive load to diffuse along the arc-shaped contour to the top and bottom regions. Compared with traditional flat sidewalls or single reinforcing rib structures, this is beneficial for improving the compressive strength of the side structure and reducing the possibility of stress concentration at sidewall joints or corners.

[0021] In addition, an impact-resistant structure is installed at the bottom of the battery compartment cavity. This structure is an isosceles triangle with rounded corners. When the vehicle's bottom is subjected to road bumps, gravel, or bottoming-out impacts, the rounded contact area prevents the sharp corners from being directly subjected to force, and the isosceles triangular contour can diffuse the bottom impact load to both sides and further transfer it to the biomimetic reinforcement structures on both sides. This helps to reduce the impact of bottom impacts on the bottom wall of the battery compartment cavity and the internal battery modules.

[0022] A perforated structure with multiple arched openings is incorporated above the battery compartment cavity. This allows the top load-bearing area to transfer vertical loads to both sides through the arched profile while reducing structural weight. This structure helps to improve the problems of local bending and stress concentration that traditional flat-top structures are prone to under load, and enhances the load-bearing stability of the top area of ​​the battery compartment while maintaining lightweight design.

[0023] The smooth connection between the arc-shaped structures in this invention helps reduce stress concentration at abrupt structural changes and connection boundaries. Lightweight fillers can be placed inside the hollow structures, and a scratch-resistant coating can be applied to the impact-resistant structure near the ground, further improving the battery compartment's lightweight design, protection, and lifespan. Overall, this invention enhances the battery compartment's comprehensive protection capabilities under complex conditions such as top load-bearing, lateral compression, and bottom impact without simply increasing material thickness. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram of the biomimetic reinforcement structure of the present invention; Figure 4 This is a geometric feature extraction diagram of the biomimetic walnut shell side ridge structure of the present invention; Figure 5This is a curve fitting diagram of the biomimetic walnut shell side ridge structure of the present invention; Figure 6 This is a geometric feature extraction diagram of the biomimetic pine nut epidermis structure of this invention; Figure 7 This is a curve fitting of the biomimetic pine nut epidermal structure of the present invention.

[0025] The markings in the diagram are: 1. Bionic reinforcement structure; 101. Semicircular arc; 102. Elliptical arc; 103. Transition arc; 2. Impact-resistant structure; 3. Hollow structure; 4. Battery compartment cavity; 5. Integrated wiring cavity. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings. It should be understood that the following embodiments are only for illustrating the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Without departing from the overall concept of the present invention, any adaptive adjustments made by those skilled in the art to the dimensions, quantity, spacing, thickness, corner radius, and local connection forms of each structure based on vehicle platform dimensions, battery module specifications, chassis mounting space, material strength, manufacturing process, and assembly boundary conditions should all fall within the scope of protection of the present invention.

[0027] Example 1 A novel battery compartment structure combining a coupled arch bridge structure and biomimetic design is disclosed. This battery compartment structure is installed at the bottom of an electric vehicle to house the power battery pack, while also serving as part of the vehicle's underbody load-bearing, protective, and wiring harness integration structure. This battery compartment structure primarily corresponds to the underbody area of ​​the vehicle used to house the power battery and support the vehicle body, excluding the front suspension, rear suspension, steering knuckles, and wheel linkage mechanisms directly connected to the wheels. The battery compartment structure can be made of aluminum alloy, high-strength steel, magnesium-aluminum alloy, or other materials with certain strength and lightweight properties, or it can be made by partially combining metallic and composite materials. Manufacturing methods include integral molding, split casting, profile extrusion, sheet metal stamping followed by welding, or screwing.

[0028] like Figure 1 , Figure 2As shown, the battery compartment structure includes a biomimetic reinforcement structure 1, an impact-resistant structure 2, a hollow structure 3, a battery compartment cavity 4, and an integrated wiring assembly cavity 5. The battery compartment cavity 4 is located in the middle of the battery compartment structure and is used to accommodate the power battery pack. Two sets of biomimetic reinforcement structures 1 are provided, located on the left and right sides of the battery compartment cavity 4, respectively. The impact-resistant structure 2 is located below the battery compartment cavity 4, on the side of the battery compartment structure closest to the ground. The hollow structure 3 is located above the battery compartment cavity 4, on the side of the battery compartment structure closest to the vehicle body. The integrated wiring assembly cavity 5 is located inside the impact-resistant structure 2 and is used to accommodate high-voltage wiring harnesses, low-voltage wiring harnesses, sampling wiring harnesses, communication wiring harnesses, temperature detection wiring harnesses, or other electrical connection components.

[0029] Therefore, the biomimetic reinforcement structure 1, the impact-resistant structure 2, and the hollow structure 3 are arranged around the sides, bottom, and top of the battery compartment cavity 4, respectively, forming a multi-directional load diversion frame around the outer periphery of the battery compartment cavity 4. When the battery compartment structure is subjected to top load, lateral compression, or bottom impact, the external load can be diffused and transferred along the hollow structure 3, the biomimetic reinforcement structure 1, and the impact-resistant structure 2, thereby reducing the risk of the load being directly concentrated on the power battery pack.

[0030] like Figure 3 As shown, the biomimetic reinforcing structure 1 includes a semicircular arc 101, an elliptical arc 102, and a transition arc 103. Specifically, the semicircular arc 101 is located in the middle of the biomimetic reinforcing structure 1, and its upper and lower ends are connected to the elliptical arc 102, respectively. The two elliptical arcs 102 are arranged opposite each other, and preferably have the same shape and are arranged in a mirror image. The end of each elliptical arc 102 away from the semicircular arc 101 is connected to a transition arc 103. The upper transition arc 103 is smoothly connected to the top region of the battery compartment structure, and the lower transition arc 103 is smoothly connected to the bottom region of the battery compartment structure. Thus, the biomimetic reinforcing structure 1 forms an arc-shaped sidewall reinforcing profile on the side of the battery compartment cavity 4, which is continuously composed of the transition arc 103, the elliptical arc 102, the semicircular arc 101, the elliptical arc 102, and the transition arc 103.

[0031] This biomimetic reinforcement structure 1 is an engineered structure obtained through feature extraction and geometric analysis of the lateral ridge structure of a walnut shell. Specifically, as shown in... Figure 4 , Figure 5 As shown, after image extraction, edge recognition, and curve fitting of the geometric features of the outer contour of the walnut shell's ribbed structure, a main contour curve formed by the combination of two elliptical arcs 102 and a semicircular arc 101 can be obtained. This main contour curve is not limited to a single absolute size, but can be proportionally enlarged, reduced, or locally modified according to the height, width, and lateral protection space of the battery compartment structure.

[0032] In general terms, elliptic arc 102 can be represented by the equation of an ellipse as:

[0033] in, These are the coordinates of the center of the ellipse containing arc 102. This refers to the lateral half-axis dimension. This refers to the longitudinal semi-axis dimension. Preferably, the ratio of the horizontal axis length to the vertical axis length of the elliptical arc 102 is 5:4, that is: .

[0034] The semicircular arc 101 can be represented by the equation of a circle as follows:

[0035] in, Let be the coordinates of the center of the circle containing semicircle 101. Let be the radius of the semicircular arc 101.

[0036] The transition arc 103 can also be represented by the equation of a circle as follows:

[0037] in, The coordinates of the center of the transition arc 103 are given. The radius of the transition arc 103.

[0038] By continuously connecting the elliptical arc 102, the semicircular arc 101 and the transition arc 103, the side profile of the biomimetic reinforcement structure 1 can form a smooth transition, reducing sharp corners and abrupt connections.

[0039] In one specific embodiment, the main contour curve of the biomimetic reinforcement structure 1 includes an upper contour curve and a lower contour curve; The upper contour curve is represented in the local coordinate system as follows:

[0040] The lower contour curve is represented in the local coordinate system as follows:

[0041] In this specific numerical example, the first segment of the upper contour curve and the first segment of the lower contour curve correspond to two elliptical arcs 102, which can be regarded as elliptical arcs with a horizontal semi-axis of 5 and a vertical semi-axis of 4. Therefore, the ratio of the horizontal axis length to the vertical axis length is 5:4. The second segment of the upper contour curve and the second segment of the lower contour curve together form the middle semicircular arc 101, and the corresponding circle equation is: .

[0042] This specific set of curve equations is only used to illustrate a geometric modeling method for the main outline of the biomimetic reinforcing structure 1, and does not limit the biomimetic reinforcing structure 1 to only using the aforementioned specific coordinates and dimensions. In actual manufacturing, the outline can be scaled proportionally according to the side space of the battery compartment structure, and smoothly connected to the top area of ​​the battery compartment and the impact-resistant structure 2 through the transition arc 103.

[0043] Based on the aforementioned biomimetic reinforcement structure 1, when the battery compartment structure is subjected to lateral compression, the external lateral load first acts on the convex arc-shaped area of ​​the biomimetic reinforcement structure 1, and then spreads to the top and bottom regions along the elliptical arc 102, semi-circular arc 101, and transition arc 103. Compared to straight sidewalls or single rectangular reinforcing ribs, this continuous arc-shaped profile can improve the local bending resistance of the sidewall section and reduce the risk of stress concentration at the connection through the arc transition. The biomimetic reinforcement structures 1 on the left and right sides are symmetrically arranged around the battery compartment cavity 4, which can form a lateral enveloping support for the battery compartment cavity 4, thereby improving the protection capability of the battery compartment structure under lateral collision, compression, and torsion conditions.

[0044] like Figure 1 , Figure 2 As shown, the hollow structure 3 is located in the top load-bearing area above the battery compartment cavity 4. The hollow structure 3 includes multiple arrayed arch-shaped hollow holes, with solid connecting ribs formed between adjacent arch-shaped hollow holes. Specifically, each hollow structure 3 has an arc-shaped structure on top and a horizontal straight structure on the bottom, with the arc-shaped structure and the horizontal straight structure together forming an arch-shaped hollow cross section. Multiple hollow structures 3 can be arranged parallel to each other along the width or length direction of the battery compartment structure, or they can be arranged non-equidistantly according to the vehicle body mounting points, battery module layout area, and local load-bearing requirements.

[0045] In a general way, the arc-shaped structure of the hollow structure 3 can be represented by the equation of a circle as follows:

[0046] in, The coordinates of the center of the arc-shaped structure above the hollow structure 3 are... Let be the radius of the arc-shaped structure. The horizontal straight structure below the hollow structure 3 can be represented by the equation of a straight line as: .

[0047] Let the hollow height of the hollow structure 3 be H, and the radius of the arc-shaped structure be... The length of the horizontal linear structure is In one specific embodiment, the radius of the arc-shaped structure is approximately 5 times the height of the cutout, and the length of the horizontal straight structure is approximately 6 times the height of the cutout, that is:

[0048]

[0049] In a specific embodiment, when the midpoint of the horizontal straight-line structure is taken as the local coordinate origin, and the direction of the horizontal straight-line structure is taken as the X-axis and the height direction as the Y-axis, the arc-shaped structure of the hollow structure 3 can be represented as:

[0050] Right now:

[0051] The arc passes through , , Three feature points form an arched load-bearing profile. The spacing between each hollow structure 3 can be dynamically adjusted according to chassis parameters. When close to the vehicle body mounting point, cabin load-bearing point, or local concentrated load area, the spacing between the hollow structures 3 can be appropriately reduced to improve local load-bearing capacity; when far away from the concentrated load area, the spacing between the hollow structures 3 can be appropriately increased to improve the lightweight effect.

[0052] Based on the aforementioned hollow structure 3, under top load conditions, the arch-shaped arc can transfer the vertical load along both ends of the arc to the surrounding solid connecting ribs and the biomimetic reinforcing structures 1 on both sides, thereby reducing the bending deformation at the center of the top region. Multiple hollow structures 3 form an array of arched load-bearing units in the top region, which can reduce material usage while retaining the main load-bearing skeleton of the top region. Furthermore, the hollow structure 3 can be filled with low-density, flame-retardant, heat-insulating, or heat-conducting materials, such as foamed aluminum, aerogel composite materials, flame-retardant foam materials, or lightweight honeycomb core materials, to achieve heat insulation, heat conduction, or auxiliary heat dissipation according to the vehicle's thermal management requirements.

[0053] like Figure 1 and Figure 2 As shown, the impact-resistant structure 2 is located at the bottom of the battery compartment structure, on the side of the battery compartment cavity 4 closest to the ground. The impact-resistant structure 2 has an isosceles triangular shape with a apex angle greater than 150°. The bottom apex angle of the impact-resistant structure 2 is rounded to create a rounded contact area, thus preventing the sharp corner from directly bearing the impact load from the ground. In addition, the impact-resistant structure 2 has an integrated wiring harness cavity 5 inside, the shape of which is adapted to the outer contour of the impact-resistant structure 2, for installing and protecting the vehicle wiring harness.

[0054] Impact-resistant structure 2 is an engineered structure obtained through feature extraction and geometric analysis of the pine nut epidermis. Specifically, such as... Figure 6 , Figure 7As shown, after digitally modeling the geometric features of the outer contour of the pine nut's outer skin structure, a contour curve consisting of two inclined straight lines and a circular arc can be obtained. This contour curve is not limited to a single absolute dimension, but can be proportionally enlarged, reduced, or locally modified according to the space at the bottom of the battery compartment, the ground clearance, the impact resistance level, and the wiring harness arrangement space.

[0055] In a general representation, the two inclined sides of the impact-resistant structure 2 can be expressed by linear equations as follows:

[0056]

[0057] in, The slope of the inclined side is the absolute value. and These are the intercepts of the corresponding straight lines. The passivation arc of the impact-resistant structure 2 can be represented by the equation of a circle as follows:

[0058] in, To determine the center coordinates of the blunted arc, To blunt the radius of the arc. Preferably, the apex corner of the impact-resistant structure 2. When the angle is greater than 150° and the two sides are approximately symmetrical, the vertex angle is... It can be determined based on the slope of the inclined side: .

[0059] Furthermore, the radius of the blunted arc Greater than or equal to the height of the base of the isosceles triangle 10 times, preferably .

[0060] In one specific embodiment, the biomimetic prototype profile of the impact-resistant structure 2 is approximately fitted in the local coordinate system by the following set of curve equations:

[0061] In this specific numerical example, the first and third segments correspond to the two inclined sides of the impact-resistant structure 2, respectively, and the middle arc segment corresponds to the arc-shaped structure formed after the vertex of the isosceles triangle has been blunted. The equation of the circle corresponding to the middle arc segment is: In other words, the center of the arc segment is... The radius is 10. The absolute value of the slope of the first and third inclined straight lines is 0.2375, which can form a blunt isosceles triangular impact-resistant structure with a vertex angle greater than 150°.

[0062] This specific set of curve equations is only used to illustrate one geometric modeling method for the impact-resistant structure 2, and does not limit the impact-resistant structure 2 to using only the specific coordinates and dimensions mentioned above. In actual manufacturing, the contour can be scaled proportionally according to the width of the battery compartment structure, the bottom space, and the impact resistance requirements, and the inclined side can be smoothly connected to the blunt arc.

[0063] With the above configuration, the impact-resistant structure 2 forms a rounded, blunted contact area on the side closest to the ground. When the bottom of the vehicle is subjected to road bumps, gravel impacts, or bottoming-out impacts, the impact load first acts on the blunted rounded area, then disperses to the left and right sides via the two inclined sides, and is further transmitted to the biomimetic reinforcement structures 1 on both sides. As a result, the bottom impact load is less likely to be directly concentrated on the bottom wall of the battery compartment cavity 4.

[0064] The integrated wiring cavity 5 is located inside the impact-resistant structure 2 and extends along the length of the battery compartment structure. The integrated wiring cavity 5 can be a rounded triangle, a curved-edge polygon, or a cavity structure similar to the outer contour of the impact-resistant structure 2. Let the distance between the bottom wall of the inner wall of the integrated wiring cavity 5 and the bottom wall of the outer wall of the impact-resistant structure 2 be... The distance between the top wall of the inner wall of the integrated wiring assembly cavity 5 and the bottom outer wall of the battery compartment cavity 4 is Then the preferred condition is: .

[0065] In other words, the thickness of the impact-resistant structure 2 on the side closest to the ground is twice the thickness of the side closest to the battery compartment cavity 4. This thickness relationship allows for a greater solid material thickness in the directly impact-affected area at the bottom, thereby improving resistance to scratches, stone chips, and bottoming out. Simultaneously, the integrated wiring harness cavity 5 allows for the centralized arrangement of wiring harnesses within the impact-resistant structure 2, reducing the number of exposed wiring harnesses and independent protective covers, and improving the integration and protection of the bottom wiring harness arrangement. Furthermore, an anti-scratch coating can be provided on the side of the impact-resistant structure 2 closest to the ground. This anti-scratch coating can be a wear-resistant polyurea coating, a flame-retardant rubber layer, a wear-resistant epoxy coating, or other vehicle underbody protection coatings.

[0066] In actual use, when the vehicle is driving normally and a vertical load is applied to the battery compartment structure from the vehicle body, the load first acts on the top area of ​​the battery compartment structure. The arched contour of the hollow structure 3 transfers the top load to the solid connecting ribs at both ends and sides of the hollow structure 3, and further to the biomimetic reinforcing structures 1 on both sides. When the vehicle is subjected to lateral compression, the lateral load first acts on the arc-shaped outer contour of the biomimetic reinforcing structure 1. The semicircular arc 101, elliptical arc 102, and transition arc 103 together form a continuous lateral force path, causing the load to diffuse to the top and bottom. When the bottom of the vehicle is impacted by a protrusion, stone, or road obstacle, the arc-shaped blunt area of ​​the impact-resistant structure 2 first contacts the impacting object. The impact load diffuses to the left and right sides along the two inclined sides and is transferred to the biomimetic reinforcing structure 1 through the lower transition arc 103. Thus, the top hollow structure 3, the two side biomimetic reinforcing structures 1, and the bottom impact-resistant structure 2 together form a multi-directional load diversion frame around the battery compartment cavity 4.

[0067] In summary, this embodiment establishes a continuous and synergistic protection and load-bearing system for the battery compartment cavity 4 by setting biomimetic reinforcement structures 1 with the biomimetic contours of walnut side ridges on both sides, setting an impact-resistant structure 2 with the biomimetic contours of pine nut skin at the bottom of the battery compartment cavity 4, and setting an arch-shaped hollow structure 3 at the top of the battery compartment cavity 4. The biomimetic reinforcement structure 1 uses elliptical arcs 102, semicircular arcs 101, and transition arcs 103 to disperse lateral loads; the impact-resistant structure 2 uses a blunted isosceles triangular cross section and a thickened solid layer at the bottom to disperse bottom impact loads; the hollow structure 3 uses an arch-shaped arc structure to improve the top load-bearing path while reducing weight; and the integrated wiring cavity 5 achieves wiring harness integration and bottom protection inside the impact-resistant structure 2.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel battery compartment structure that couples an arch bridge structure with biomimetic elements, characterized in that, Includes a battery compartment cavity, two sets of biomimetic reinforcement structures, an impact-resistant structure, and a hollow structure; The battery compartment cavity is located in the middle of the battery compartment structure and is used to accommodate the power battery pack; The two sets of biomimetic reinforcement structures are respectively set on opposite sides of the battery compartment cavity. Each set of biomimetic reinforcement structures includes a semi-circular arc in the middle, two elliptical arcs connected to the upper and lower ends of the semi-circular arc, and two transition arcs connected to the outer ends of the two elliptical arcs. One of the transition arcs is smoothly connected to the top area of ​​the battery compartment structure, and the other transition arc is smoothly connected to the bottom area of ​​the battery compartment structure, so as to form a continuous arc-shaped lateral force path on the side of the battery compartment cavity. The impact-resistant structure is located below the battery compartment cavity. The impact-resistant structure is an isosceles triangular structure, and the apex of the side closest to the ground is rounded to form a rounded contact area. The hollow structure is disposed above the battery compartment cavity, and the hollow structure includes multiple arch-shaped hollow holes arranged at intervals. Among them, the hollow structure, two sets of biomimetic reinforcement structures and impact-resistant structures form a continuous multi-directional load diversion frame around the battery compartment cavity, so that the top load can be transferred to both sides through the hollow structure, the lateral compression load can be diffused to the top area and the impact-resistant structure through the biomimetic reinforcement structure, and the bottom impact load can be diffused to the biomimetic reinforcement structures on both sides through the impact-resistant structure.

2. The novel battery compartment structure with coupled arch bridge structure and biomimetic design according to claim 1, characterized in that, The ratio of the horizontal axis length to the vertical axis length of the elliptical arc is 5:

4.

3. The novel battery compartment structure with coupled arch bridge structure and biomimetic design as described in claim 1, characterized in that, The impact-resistant structure has an integrated wiring cavity inside to accommodate the vehicle wiring harness. The integrated wire assembly cavity extends along the length of the battery compartment structure, and the shape of the integrated wire assembly cavity is adapted to the outer contour of the impact-resistant structure.

4. The novel battery compartment structure with coupled arch bridge structure and biomimetic design as described in claim 3, characterized in that, The ratio of the distance between the bottom inner wall of the integrated line assembly cavity and the bottom outer wall of the impact-resistant structure to the distance between the top inner wall of the integrated line assembly cavity and the bottom outer wall of the battery compartment cavity is 2:

1.

5. The novel battery compartment structure with coupled arch bridge structure and biomimetic design according to claim 1, characterized in that, Each arch-shaped perforation includes an upper arc-shaped structure and a lower horizontal straight structure. The radius of the arc-shaped structure is 5 times the height of the perforation, and the length of the horizontal straight structure is 6 times the height of the perforation.

6. The novel battery compartment structure with coupled arch bridge structure and biomimetic design according to claim 1, characterized in that, The isosceles triangular structure of the impact-resistant structure has a vertex angle greater than 150°.

7. The novel battery compartment structure with coupled arch bridge structure and biomimetic design according to claim 1, characterized in that, The hollow structure is filled with a lightweight filler, which may be foamed aluminum, aerogel composite material, flame-retardant foam material, or lightweight honeycomb core material.

8. The novel battery compartment structure with coupled arch bridge structure and biomimetic design according to claim 1, characterized in that, The impact-resistant structure has a scratch-resistant coating on the side closest to the ground. The scratch-resistant coating is a wear-resistant polyurea coating, a flame-retardant rubber layer, or a wear-resistant epoxy coating.

9. The novel battery compartment structure with coupled arch bridge structure and biomimetic design according to claim 1, characterized in that, The main contour curve of the biomimetic reinforcement structure includes an upper contour curve and a lower contour curve; The upper contour curve is represented in the local coordinate system as follows: The lower contour curve is represented in the local coordinate system as follows: The main contour curve of the biomimetic reinforced structure includes a semi-circular arc and an elliptical arc.

10. The novel battery compartment structure with coupled arch bridge structure and biomimetic design according to claim 1, characterized in that, The biomimetic prototype profile of the impact-resistant structure is approximately fitted by the following set of curve equations in the local coordinate system: 。

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