Composite bionic electric vehicle battery compartment with lateral impact-resistant reinforcement structure

Abstract

The application provides a composite bionic electric vehicle battery compartment with lateral impact resistance reinforcing structure, applied to the technical field of battery compartment design, comprising a bearing frame and a reinforcing flange, the reinforcing flange comprises outward convex wave crest portions and inward concave wave valley portions arranged alternately along the top profile of the bearing frame; the bearing frame comprises hollow bearing units arranged transversely in the main frame body, and the adjacent units are connected by longitudinal reinforcing ribs; the bearing unit comprises a central portion, an inclined reinforcing rib and a transverse supporting rib, the central portion is a regular hexagon structure connected by six auxiliary reinforcing ribs, the upper and lower two auxiliary reinforcing ribs are connected with the main frame body, and the left and right two connecting ends are connected with the transverse supporting rib, the transverse supporting rib is provided with arrayed inclined reinforcing ribs, and the inclined reinforcing ribs are parallel to and equal in length to the corresponding auxiliary reinforcing ribs. The application can realize lightweighting, and significantly improve the lateral impact resistance, bending resistance, torsion resistance and shock absorption and energy absorption performance of the battery compartment.

Description

Technical Field

[0001] This invention belongs to the field of battery compartment design technology, specifically relating to a composite biomimetic electric vehicle battery compartment with a lateral impact-resistant reinforcement structure. Background Technology

[0002] The global new energy vehicle industry is developing rapidly. As the core power source of the vehicle, the operational safety of the power battery and the overall vehicle lightweighting level have become important factors affecting vehicle range and ensuring stable driving. The battery compartment, as the carrier and protector of the power battery, mainly undertakes the functions of fixing the power battery, resisting external impacts, and ensuring structural integrity under conditions such as lateral collisions, vibrations, and compression, thereby preventing damage to the power battery cells. Its rational structural design plays a crucial role in the safety performance of electric vehicles.

[0003] Currently, electric vehicle battery compartments are mostly cast from materials such as steel plates and aluminum alloys, then the surface is sprayed, welded, and riveted together. The metal compartment has high strength, but it is heavy and has limited impact and deformation resistance. Under extrusion or side collision conditions, it is prone to local damage. Its protection capability for the power battery cannot fully meet the current safety requirements for battery compartments in the "Safety Requirements for Power Batteries for Electric Vehicles" (GB38031-2020) and its subsequent version (GB38031-2025), which require vibration, mechanical shock, simulated collision, and extrusion tests.

[0004] To improve the mechanical performance of battery compartments while achieving lightweight design, various biomimetic structural optimization schemes have been proposed in the industry. However, existing solutions mostly adopt a single biomimetic configuration, leaving room for improvement in terms of uniform stress distribution, resistance to lateral impacts and compression, and making it difficult to achieve synergistic enhancement of multiple structures on the basis of lightweight design. Therefore, there is an urgent need to design a new type of battery compartment that can achieve multi-structure synergy, balancing lightweight design with high protection performance, in order to improve the safety of electric vehicle power battery systems and the overall performance of the vehicle. Summary of the Invention

[0005] In view of the above-mentioned problems in the prior art, the purpose of this invention is to provide a composite biomimetic electric vehicle battery compartment with a lateral impact-resistant reinforcement structure. By integrating three biomimetic structures—honeycomb, spider web, and cuttlebone—the battery compartment is significantly improved in terms of lateral impact resistance, bending resistance, torsion resistance, and vibration damping and energy absorption performance while achieving lightweighting.

[0006] A composite biomimetic electric vehicle battery compartment with a lateral impact-resistant reinforcement structure includes a support frame and a reinforcing flange. The reinforcing flange includes convex crests and concave troughs, which are alternately arranged along the top contour of the support frame to form periodic wave-shaped connecting units. The support frame includes a first sidewall and a second sidewall. The first sidewall includes at least one hollow support unit, and the second sidewall includes at least two hollow support units. The hollow support units are disposed within a main frame, and multiple hollow support units are arranged laterally within the main frame. Adjacent hollow support units are connected by longitudinal reinforcement. The hollowed-out load-bearing unit includes a central part, inclined reinforcing ribs, and transverse supporting ribs. The central part is a regular hexagonal structure formed by six auxiliary reinforcing ribs. The upper and lower auxiliary reinforcing ribs of the central part are connected to the main frame. The connecting ends of the two auxiliary reinforcing ribs on the left and the two auxiliary reinforcing ribs on the right of the central part are connected to transverse supporting ribs. The other end of the transverse supporting ribs is connected to the main frame or a longitudinal reinforcing rib. N inclined reinforcing ribs are arranged in an array on the transverse supporting ribs. The other end of the inclined reinforcing ribs is connected to the main frame. The inclined reinforcing ribs are parallel to and of equal length to the auxiliary reinforcing ribs at the corresponding positions.

[0007] Preferably, the convex crest and concave trough of the wave-shaped connecting unit are smoothly connected, and the end of the concave trough of the wave-shaped connecting unit is smoothly connected to the beginning of the convex crest of the adjacent wave-shaped connecting unit.

[0008] Preferably, the corner of the reinforced flange is set as a corner connecting unit, the corner connecting unit includes two outwardly convex peaks connected by a smooth transition portion, and the end of the outwardly convex peak of the corner connecting unit is smoothly connected to the inwardly concave valley of the wavy connecting unit.

[0009] Preferably, the first sidewall includes a main frame, a central section, an inclined reinforcing rib, and a transverse supporting rib. The main frame is a rectangular hollow frame structure. The central section is located at the center of the main frame, and the center of symmetry of the central section coincides with the center of symmetry of the main frame. The upper and lower auxiliary reinforcing ribs of the central section are connected to the main frame. The connecting ends of the two auxiliary reinforcing ribs on the left side of the central section are connected to the main frame via the transverse supporting rib. The connecting ends of the two auxiliary reinforcing ribs on the right side of the central section are connected to the main frame via the transverse supporting rib. The transverse axis of the transverse supporting rib is collinear with the transverse axis of the main frame. The central section and the two transverse supporting ribs divide the interior of the main frame into four spaces. Two inclined reinforcing ribs are arranged in an array in each space. One end of the inclined reinforcing rib is connected to the main frame, and the other end is connected to the transverse supporting rib.

[0010] Preferably, the central part divides the interior of the main frame into a left cavity and a right cavity, and the inclined reinforcing ribs and transverse supporting ribs distributed vertically in the left and right cavities are connected in a Y-shape; the auxiliary reinforcing ribs distributed inclined in the central part are connected in a Y-shape with the transverse supporting ribs at the corresponding positions.

[0011] Preferably, the second sidewall includes a main frame and a longitudinal reinforcing rib. The main frame is a rectangular hollow frame structure. The longitudinal reinforcing rib is located at the center of the main frame and its central axis is collinear with the axial axis of symmetry of the main frame. The longitudinal reinforcing rib divides the main frame into two load-bearing spaces, left and right.

[0012] Preferably, the left and right bearing spaces of the second sidewall are each provided with a central part II, an inclined reinforcing rib II, and a transverse supporting rib II. The central part II is located in the center of the bearing space, and the center of symmetry of the central part II coincides with the center of symmetry of the corresponding bearing space. The upper and lower auxiliary reinforcing ribs of the central part II are connected to the main frame II. The connecting ends of the two auxiliary reinforcing ribs on one side of the central part II are connected to the main frame II through the transverse supporting rib II. The connecting ends of the two auxiliary reinforcing ribs on the other side of the central part II are connected to the longitudinal reinforcing ribs through the transverse supporting rib II. The transverse axes of the two transverse supporting ribs II are collinear with the transverse axis of the main frame II. The central part II and the two transverse supporting ribs II divide the corresponding bearing space into four spaces. In each space, two arrayed inclined reinforcing ribs II are provided. One end of the inclined reinforcing rib II is connected to the main frame II, and the other end is connected to the transverse supporting rib II.

[0013] Preferably, the central part two divides the corresponding bearing space into a left cavity and a right cavity, and the inclined reinforcing ribs two and the transverse supporting ribs two distributed vertically in the left cavity and the right cavity are connected in a Y-shape; the inclined auxiliary reinforcing ribs in the central part two are connected in a Y-shape with the transverse supporting ribs two at the corresponding positions.

[0014] Preferably, the width of the auxiliary reinforcing rib in the central part is the same as the width of the transverse supporting rib and the width of the longitudinal reinforcing rib, and is wider than the width of the inclined reinforcing rib.

[0015] Preferably, the support frame is a composite biomimetic hollow frame structure formed by two first side walls and two second side walls. The main frame of the first side wall and the main frame of the second side wall are connected to form an integrated corner support frame. The width of the corner support frame is greater than the width of the transverse support rib, the longitudinal reinforcing rib and the inclined reinforcing rib.

[0016] The beneficial effects of this invention are as follows: the composite biomimetic electric vehicle battery compartment with lateral impact-resistant reinforcement structure achieves honeycomb biomimetic through the central structure design, spider web biomimetic through the connecting rib network formed by multiple connecting components, and cuttlebone biomimetic through the staggered arrangement of outwardly convex peaks and inwardly concave troughs, thereby forming an integrated structure of honeycomb-spider web-cuttlebone, enabling the battery compartment to have high impact resistance, bending resistance, torsion resistance and vibration reduction and energy absorption capacity under the condition of lightweight.

[0017] Furthermore, the honeycomb, spiderweb, and cuttlebone biomimetic structures work synergistically in terms of load-bearing path, stiffness distribution, and energy dissipation mechanism. The honeycomb structure primarily bears the foundation load and provides support, the spiderweb structure mainly handles local load diffusion and toughness adjustment, and the cuttlebone structure primarily provides top boundary stiffening and deformation resistance. The combined effect of these three structures allows the battery compartment to maintain overall structural integrity more effectively under combined conditions such as lateral collisions, vertical compression, chassis vibration, and alternating loads, compared to conventional flat or single-stiffener battery compartments. This reduces the risk of local collapse, boundary instability, and excessive stress concentration, thereby improving the structural safety and reliability of the battery compartment.

[0018] Through the structural design of the central section, transverse support ribs, inclined reinforcing ribs, longitudinal reinforcing ribs, and main frame, the support frame forms a multi-layered hollow structure. This allows the battery compartment to not only have high lateral impact resistance but also to buffer and attenuate vertical vibrations and alternating loads transmitted from the chassis during vehicle operation. This structure helps to reduce the direct transmission of vibration loads to the battery module, reducing the possibility of damage to internal cells and related components due to continuous vibration, compression, or localized impacts, thus achieving a dual protection effect of lateral impact resistance and vertical vibration damping and energy absorption.

[0019] Furthermore, while ensuring impact resistance, bending resistance, and torsion resistance, the battery compartment is prepared using short-cut carbon fiber composite material combined with an integrated injection molding process. This allows the sidewalls and top biomimetic flanges to form a continuous, integrated structure, which reduces the weak connection areas caused by traditional split connections and improves the overall connection strength, impact resistance, and structural stability. Attached Figure Description

[0020] 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 top view of the present invention; Figure 3 This is a side view of the first sidewall of the present invention; Figure 4 This is a side view of the second sidewall of the present invention; Figure 5 This is a partial structural schematic diagram of the present invention.

[0021] The markings in the diagram are as follows: 1. Support frame; 101. Main frame one; 102. Central section one; 103. Inclined reinforcing rib one; 104. Transverse support rib one; 105. Main frame two; 106. Central section two; 107. Inclined reinforcing rib two; 108. Transverse support rib two; 109. Longitudinal reinforcing rib; 110. Corner support frame; 2. Reinforced flange; 201. Outwardly convex crest; 202. Inwardly concave trough; 203. Smooth transition section. Detailed Implementation

[0022] Example 1 like Figure 1 As shown, a composite biomimetic electric vehicle battery compartment with a lateral impact-resistant reinforcement structure includes a support frame 1 and a reinforcing flange 2. The support frame 1 is a hollow frame structure with open top and bottom. The reinforcing flange 2 is located at the top of the support frame 1 and extends outward to form an integrally molded battery compartment structure. Through the synergistic effect of the hollow side wall structure and the top reinforcing flange, this battery compartment structure can significantly improve the overall compression resistance and lateral impact resistance of the power battery compartment under the same weight.

[0023] like Figure 2 As shown, the reinforcing flange 2 is a biomimetic corrugated structure, including an outwardly convex crest 201 and an inwardly concave trough 202. The outwardly convex crest 201 and the inwardly concave trough 202 are arranged alternately along the top contour of the support frame 1, forming a periodic wave-shaped connecting unit. Figure 2 As shown, the red markings represent the convex peaks 201, and the green markings represent the concave troughs 202.

[0024] Specifically, the convex crest portion 201 and the concave trough portion 202 are smoothly connected, and the end of the concave trough portion 202 of the previous wave-shaped connecting unit is smoothly connected to the beginning of the convex crest portion 201 of the adjacent wave-shaped connecting unit, thereby forming a wave-shaped outer peripheral contour.

[0025] In addition, the four corners of the reinforced flange 2 are provided with corner connection units, which include two outward convex peaks 201 and a smooth transition part 203, wherein the two outward convex peaks 201 are smoothly connected through the smooth transition part 203.

[0026] It should be noted that the corner connecting unit and the wavy connecting unit follow a structural design of alternating convex wave crests 201 and concave wave troughs 202, that is, the end of the convex wave crest 201 in the corner connecting unit is connected to the end of the concave wave trough 202 in the wavy connecting unit.

[0027] The reinforced flange 2, as a cuttlebone biomimetic structure, is applied to the top flange of the battery compartment. Utilizing the advantages of the cuttlebone structure, such as uniform stress transmission, excellent compression resistance, and energy absorption performance, it can significantly improve the overall bending stiffness and lateral impact resistance of the top of the compartment. On the other hand, it can serve as an overlapping structure with the vehicle body or battery pack cover. Through the wavy contour, it achieves multi-point contact and uniform load transmission, reducing material while ensuring sealing and enhancing connection reliability and structural stability.

[0028] like Figures 3 to 5 As shown, the support frame 1, which serves as the sidewall of the battery compartment, is a composite biomimetic hollow frame structure formed by two first sidewalls and two second sidewalls. Among them, Figure 3 , Figure 4 The red dashed line in the middle is the corresponding axis mark.

[0029] like Figure 3 As shown, the first sidewall includes a main frame 101, a central part 102, an inclined reinforcing rib 103, and a transverse supporting rib 104. The width of the central part 102 is the same as the width of the transverse supporting rib 104, and is wider than the width of the inclined reinforcing rib 103.

[0030] Specifically, the main frame 101 is a rectangular hollow frame structure, and the central part 102 is located in the center of the main frame 101, with the center of symmetry of the central part 102 coinciding with the center of symmetry of the main frame 101. The central part 102 divides the cavity of the main frame 101 into a left cavity and a right cavity.

[0031] In this embodiment, the central part 102 is a regular hexagonal structure formed by six auxiliary reinforcing ribs. As a honeycomb biomimetic structure, the central part 102 is the core load-bearing structure of the battery compartment sidewall, bearing the main axial load and impact load, and bearing most of the stress on both sides. It is composed of six auxiliary reinforcing ribs of completely equal length, which can enhance the strength of the structure.

[0032] Specifically, such as Figure 3 As shown, the upper and lower auxiliary reinforcing ribs of the central part 102 are connected to the main frame 101. The connecting ends of the two auxiliary reinforcing ribs on the left side of the central part 102 are connected to the main frame 101 through the transverse support ribs 104. Correspondingly, the connecting ends of the two auxiliary reinforcing ribs on the right side of the central part 102 are connected to the main frame 101 through the transverse support ribs 104. The transverse axes of the two transverse support ribs 104 are collinear with the transverse axis of the main frame 101, dividing the left cavity and right cavity formed between the central part 102 and the main frame 101 into upper and lower parts, for a total of four spaces.

[0033] like Figure 3As shown, within the four spaces formed by the main frame 101, the central part 102, and the transverse support ribs 104, two arrayed inclined reinforcing ribs 103 are respectively provided. One end of the inclined reinforcing ribs 103 is connected to the main frame 101, and the other end is connected to the transverse support ribs 104. The two inclined reinforcing ribs 103 respectively form three hollow structures in the corresponding spaces, including two identical parallelogram hollow structures and one right trapezoidal hollow structure.

[0034] Specifically, in the upper part of the left cavity, the inclination direction of the two inclined reinforcing ribs 103 is the same as the inclination direction of the auxiliary reinforcing rib in the central part 102 located in the upper part of the left cavity, and their lengths are the same. In the lower part of the left cavity, the inclination direction of the two inclined reinforcing ribs 103 is the same as the inclination direction of the auxiliary reinforcing rib in the central part 102 located in the lower part of the left cavity, and their lengths are the same. In the upper part of the right cavity, the inclination direction of the two inclined reinforcing ribs 103 is the same as the inclination direction of the auxiliary reinforcing rib in the central part 102 located in the upper part of the right cavity, and their lengths are the same. In the lower part of the right cavity, the inclination direction of the two inclined reinforcing ribs 103 is the same as the inclination direction of the auxiliary reinforcing rib in the central part 102 located in the lower part of the right cavity, and their lengths are the same.

[0035] like Figure 3 As shown, a hollowed-out load-bearing unit is formed between the central part 102, the inclined reinforcing ribs 103, and the transverse supporting ribs 104. Specifically, the inclined reinforcing ribs 103 and transverse supporting ribs 104 at their corresponding positions in the left and right cavities form Y-shaped connections, and the inclined auxiliary reinforcing ribs in the central part 102 also form Y-shaped connections with their corresponding transverse supporting ribs 104, thus creating a spiderweb-like biomimetic structure. The multi-level mesh-like connecting ribs distributed between the honeycomb units can quickly diffuse local impact loads to the entire sidewall, avoiding the brittle instability problems that easily occur in single honeycomb structures.

[0036] Among them, the inclined reinforcing rib 103 is used to disperse the stress transmitted from various directions, forming a multi-level stress grid, and the transverse supporting rib 104 and the central part 102 bear the Z-direction load and lateral impact. Furthermore, as... Figure 3 As shown, the horizontal support rib 104 divides the main frame 101 into a hollow structure with upper and lower layers. Compared with a single-layer hollow structure, the double-layer hollow structure can improve the shear resistance and impact resistance of the side wall.

[0037] Example 2 like Figure 4As shown, the second sidewall includes a main frame 105, a central part 106, an inclined reinforcing rib 107, a transverse support rib 108, and a longitudinal reinforcing rib 109. The width of the central part 106 is the same as the width of the transverse support rib 108 and the longitudinal reinforcing rib 109, and is wider than the width of the inclined reinforcing rib 107.

[0038] Among them, the main frame 2 105 is a rectangular hollow frame structure, and the longitudinal reinforcing rib 109 is set at the center of the main frame 2 105, and the central axis of the longitudinal reinforcing rib 109 is collinear with the axial symmetry axis of the main frame 2 105, dividing the main frame 2 105 into two load-bearing spaces, left and right.

[0039] The structural designs of the left and right load-bearing spaces are the same. The following description will take the left load-bearing space as an example, and the structure of the right load-bearing space will not be repeated.

[0040] like Figure 4 As shown, a second central portion 106 is provided in the center of the left-side bearing space, and the center of symmetry of the second central portion 106 coincides with the center of symmetry of the left-side bearing space. The structure of the second central portion 106 in this embodiment is the same as that of the first central portion 102 in embodiment one, both being a regular hexagonal structure formed by six auxiliary reinforcing ribs.

[0041] Within the left-side load-bearing space, the upper and lower auxiliary reinforcing ribs of the central part 2 106 are connected to the main frame 2 105. The connecting ends of the two auxiliary reinforcing ribs on the left side of the central part 2 106 are connected to the main frame 2 105 via transverse support ribs 2 108. The connecting ends of the two auxiliary reinforcing ribs on the right side of the central part 2 106 are connected to the longitudinal reinforcing rib 109 via transverse support ribs 2 108. The transverse axes of the two transverse support ribs 2 108 are collinear with the transverse axis of the main frame 2 105, dividing the left cavity and right cavity formed between the central part 2 106 and the main frame 2 105 into upper and lower parts, for a total of four spaces.

[0042] Within the four spaces formed by the main frame 105, the central section 106, the transverse support rib 108, and the longitudinal reinforcing rib 109, two arrayed inclined reinforcing ribs 107 are respectively provided. One end of the inclined reinforcing rib 107 is connected to the main frame 105, and the other end is connected to the transverse support rib 108. The two inclined reinforcing ribs 107 respectively form three hollow structures in their corresponding spaces, including two identical parallelogram hollow structures and one right trapezoidal hollow structure. The structural design of the inclined reinforcing rib 107 in this embodiment is the same as that of the inclined reinforcing rib 103 in Embodiment 1, and will not be described again here.

[0043] Based on Embodiment 1, it can be said that the two hollowed-out load-bearing units are connected within the main frame 105 by the longitudinal stiffener 109, thereby forming the second sidewall structure. The longitudinal stiffener 109 can serve as an intermediate support frame for connecting the hollowed-out load-bearing units, and can also effectively prevent the excessive transmission of unilateral impact loads to the other side, thus avoiding overall deformation and instability of the battery compartment.

[0044] Example 3 Based on Embodiment 2, the first sidewall described in Embodiment 1 and the second sidewall described in Embodiment 2 are used to enclose a rectangular battery compartment. For example... Figure 5 As shown, the main frame 101 of the first side wall and the main frame 105 of the second side wall are connected to form an integral corner support frame 110. The width of the corner support frame 110 is greater than the width of the transverse support rib, the longitudinal reinforcing rib 109 and the inclined reinforcing rib. Its cross-section is rectangular and fits seamlessly with the outer edge contour of the side wall to support the four corners of the battery compartment.

[0045] It should be noted that the first sidewall of the battery compartment (the sidewall arranged along the shorter side) includes at least one hollow support unit, and the second sidewall (the sidewall arranged along the longer side) includes at least two hollow support units, and the two adjacent hollow support units are connected by longitudinal reinforcing ribs 109.

[0046] The battery compartment is made of short-cut carbon fiber composite material through integrated injection molding, which ensures structural strength while achieving lightweight and mass production feasibility.

[0047] 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 composite biomimetic electric vehicle battery compartment with a lateral impact-resistant reinforcement structure, characterized in that, It includes a support frame (1) and a reinforcing flange (2). The reinforcing flange (2) includes an outwardly convex crest (201) and an inwardly concave trough (202). The outwardly convex crest (201) and the inwardly concave trough (202) are arranged alternately along the top contour of the support frame (1) to form a periodic wave-shaped connection unit. The support frame (1) includes a first side wall and a second side wall. The first side wall includes at least one hollow support unit, and the second side wall includes at least two hollow support units. The hollow support units are arranged in the main frame. Multiple hollow support units are arranged horizontally in sequence in the main frame. Adjacent hollow support units are connected by longitudinal reinforcing ribs (109). The hollowed-out load-bearing unit includes a central part, inclined reinforcing ribs and transverse supporting ribs. The central part is a regular hexagonal structure formed by six auxiliary reinforcing ribs. The upper and lower auxiliary reinforcing ribs of the central part are connected to the main frame. The connecting ends of the two auxiliary reinforcing ribs on the left and the two auxiliary reinforcing ribs on the right of the central part are connected to transverse supporting ribs. The other end of the transverse supporting ribs is connected to the main frame or the longitudinal reinforcing rib (109). N inclined reinforcing ribs are arranged in an array on the transverse supporting ribs. The other end of the inclined reinforcing ribs is connected to the main frame. The inclined reinforcing ribs are parallel to and of equal length to the auxiliary reinforcing ribs at the corresponding positions. The first sidewall includes a main frame (101), a central part (102), an inclined reinforcing rib (103), and a transverse supporting rib (104). The main frame (101) is a rectangular hollow frame structure. The central part (102) is located in the center of the main frame (101), and the center of symmetry of the central part (102) coincides with the center of symmetry of the main frame (101). The upper and lower auxiliary reinforcing ribs of the central part (102) are connected to the main frame (101). The connecting ends of the two auxiliary reinforcing ribs on the left side of the central part (102) are connected to the main frame (101) through the horizontal support rib (104). The connecting ends of the two auxiliary reinforcing ribs on the right side of the central part (102) are connected to the main frame (101) through the horizontal support rib (104). The horizontal axis of the horizontal support rib (104) is collinear with the horizontal axis of the main frame (101). The central part (102) and the two transverse support ribs (104) divide the interior of the main frame (101) into four spaces. In each space, two arrayed inclined reinforcing ribs (103) are respectively provided. One end of the inclined reinforcing rib (103) is connected to the main frame (101), and the other end is connected to the transverse support rib (104). The central part (102) divides the interior of the main frame (101) into a left cavity and a right cavity. The inclined reinforcing ribs (103) and the transverse supporting ribs (104) distributed vertically in the left and right cavities are connected in a Y-shape. The auxiliary reinforcing ribs distributed inclined in the central part (102) are connected in a Y-shape with the transverse supporting ribs (104) at the corresponding positions. The second sidewall includes a main frame (105) and a longitudinal reinforcing rib (109). The main frame (105) is a rectangular hollow frame structure. The longitudinal reinforcing rib (109) is located in the center of the main frame (105) and the central axis of the longitudinal reinforcing rib (109) is collinear with the axial symmetry axis of the main frame (105). The longitudinal reinforcing rib (109) divides the main frame (105) into two load-bearing spaces, left and right. The second sidewall is provided with a central part (106), an inclined reinforcing rib (107), and a transverse supporting rib (108) in both the left and right bearing spaces. The second central part (106) is located in the center of the bearing space, and the center of symmetry of the second central part (106) coincides with the center of symmetry of the corresponding bearing space. The upper and lower auxiliary reinforcing ribs of the second central part (106) are connected to the second main frame (105). The connecting ends of the two auxiliary reinforcing ribs on one side of the second central part (106) are connected to the second main frame (105) through the second transverse support rib (108). The connecting ends of the two auxiliary reinforcing ribs on the other side of the second central part (106) are connected to the longitudinal reinforcing rib (109) through the second transverse support rib (108). The transverse axis of the two second transverse support ribs (108) is collinear with the transverse axis of the second main frame (105). The central part 2 (106) and the two transverse support ribs 2 (108) divide the corresponding bearing space into four spaces. In each space, two arrayed inclined reinforcing ribs 2 (107) are respectively set. One end of the inclined reinforcing ribs 2 (107) is connected to the main frame 2 (105), and the other end is connected to the transverse support ribs 2 (108). The central part 2 (106) divides the corresponding bearing space into a left cavity and a right cavity. The inclined reinforcing ribs 2 (107) and the transverse supporting ribs 2 (108) distributed vertically in the left cavity and the right cavity are connected in a Y-shape. The auxiliary reinforcing ribs distributed inclined in the central part 2 (106) are connected in a Y-shape with the transverse supporting ribs 2 (108) at the corresponding positions.

2. The composite biomimetic electric vehicle battery compartment with lateral impact-resistant reinforcement structure according to claim 1, characterized in that, The outer convex wave crest (201) and inner concave wave trough (202) of the wave-shaped connecting unit are smoothly connected, and the end of the inner concave wave trough (202) of the wave-shaped connecting unit is smoothly connected to the beginning of the outer convex wave crest (201) of the adjacent wave-shaped connecting unit.

3. The composite biomimetic electric vehicle battery compartment with lateral impact-resistant reinforcement structure according to claim 1, characterized in that, The corner of the reinforced flange (2) is set as a corner connection unit. The corner connection unit includes two convex peaks (201) connected by a smooth transition part (203). The end of the convex peak (201) of the corner connection unit is smoothly connected to the concave valley (202) of the wave-shaped connection unit.

4. The composite biomimetic electric vehicle battery compartment with lateral impact-resistant reinforcement structure according to claim 1, characterized in that, The width of the auxiliary reinforcing rib in the central part is the same as the width of the transverse supporting rib and the width of the longitudinal reinforcing rib (109), and is wider than the width of the inclined reinforcing rib.

5. The composite biomimetic electric vehicle battery compartment with lateral impact-resistant reinforcement structure according to claim 1, characterized in that, The support frame (1) is a composite biomimetic hollow frame structure formed by two first side walls and two second side walls. The main frame of the first side wall (101) and the main frame of the second side wall (105) are connected to form an integrated corner support frame (110). The width of the corner support frame (110) is greater than the width of the transverse support rib, the longitudinal reinforcing rib (109) and the inclined reinforcing rib.

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