A bottom protection assembly and vehicle

Abstract

The utility model relates to power battery technical field discloses a bottom protection assembly and vehicle, including bottom guard board and fastener, the four around edges of bottom guard board are provided with mounting hole, fastener passes through mounting hole from the side of bottom guard board away from the bottom of battery package, to lock bottom guard board at the bottom of battery package, the four around edges of bottom guard board still are provided with convex part, the height of convex part is greater than the height of fastener protruding from the side of bottom guard board away from the bottom of battery package, the utility model discloses through the four around edges of bottom guard board additional convex part, and design the height of convex part is greater than the height of fastener protruding from the side of bottom guard board away from the bottom of battery package, so that not only strengthen the physical protection of bottom guard board to battery package, solve the problem that fastener appears torsional damping because of stress and pressure, even damage, significantly improve the comprehensive protection efficiency of battery package, enhance the service life, reliability and safety of electric automobile under various environments.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, and in particular to a bottom protection component and vehicle. Background Technology

[0002] In the structural design of electric vehicles, the battery pack is usually installed at the bottom of the vehicle. This layout design has several advantages:

[0003] (1) Lowering the vehicle’s center of gravity: The battery pack is placed at the bottom of the vehicle, which helps to reduce the overall center of gravity of the vehicle and thus improve driving stability.

[0004] (2) Balanced weight distribution: The position of the battery pack makes the weight distribution of the vehicle more balanced, which helps to balance the load on the front and rear axles and ensures the stability and handling of the vehicle during driving.

[0005] (3) Reduce center of gravity shift: This design effectively reduces the center of gravity shift of the vehicle during driving, further improving the vehicle's dynamic performance and enabling the driver to drive more freely.

[0006] In conclusion, the design of placing the battery pack at the bottom of the vehicle not only enhances the vehicle's stability and handling but also improves its sporty performance, providing drivers with a superior driving experience.

[0007] When the battery pack is installed exposed under the vehicle, it is easily damaged or deformed by bumps or splashes from the road (such as sand, gravel, and metal containers) during driving. Currently, the industry standard for battery pack protection is to install a protective plate under the battery pack to provide an extra layer of protection. However, this plate exposes fasteners. Over time, it has been found that when the plate is subjected to impact or scrape, these exposed fasteners (such as screws) may also experience additional impact force. This can cause the bolts to lose torque or even break under pressure, undoubtedly weakening the protection and reducing the battery pack's reliability.

[0008] Therefore, it is particularly important to make necessary improvements and optimizations to address the shortcomings of existing technologies.

[0009] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0010] This utility model provides a bottom protection component and a vehicle to solve the problems existing in the prior art.

[0011] To achieve the above objectives, this utility model provides the following technical solution:

[0012] In a first aspect, this utility model provides a bottom protection component for installation on the bottom of a battery pack, characterized in that the component includes a bottom protective plate and fasteners; wherein,

[0013] The bottom protective plate has mounting holes around its four edges;

[0014] The fastener passes through the mounting hole from the side of the bottom cover away from the bottom of the battery pack to lock the bottom cover to the bottom of the battery pack;

[0015] The bottom guard plate also has a raised portion on the side away from the bottom of the battery pack around its perimeter. The height of the raised portion is greater than the height of the fastener protruding from the bottom guard plate on the side away from the bottom of the battery pack.

[0016] Furthermore, in the bottom protective assembly, the mounting hole is disposed adjacent to the protrusion, and the distance between the mounting hole and the protrusion is 50-60mm.

[0017] Furthermore, in the bottom protection assembly, the mounting holes and the protrusions are alternately arranged along the edge of the bottom protective plate, and the protrusions can be used to avoid the protrusions at the bottom of the battery pack.

[0018] Furthermore, in the bottom protection assembly, the protrusion includes a platform away from the bottom of the battery pack and an arcuate surface connecting the platform and the protective plate; the platform is elliptical or racetrack-shaped; in a direction perpendicular to the plane where the bottom protective plate is located, the projection line of the edge of the bottom protective plate passes through the elliptical or racetrack shape projected by the platform.

[0019] Furthermore, in the bottom protection assembly, the projection line of the edge of the bottom guard plate is perpendicular to the major axis of the ellipse projected onto the tabletop, or perpendicular to the straight side of the racetrack shape.

[0020] Furthermore, the bottom protective assembly further includes foam;

[0021] The foam is disposed between the bottom protective plate and the battery pack, and the four edges of the foam are provided with cuts corresponding to the positions of the protrusions to surround the protrusions.

[0022] Furthermore, in the bottom protective assembly, the projected area of ​​the cut is equal to or greater than the projected area of ​​the protrusion in a direction perpendicular to the plane of the foam.

[0023] Furthermore, in the bottom protection assembly, the side of the bottom protective plate away from the bottom of the battery pack is coated with a protective coating.

[0024] Furthermore, in the bottom protective assembly, the thickness of the protective coating applied to the protrusion is greater than the thickness of the protective coating at other locations.

[0025] In a second aspect, the present invention provides a vehicle including a battery pack and a bottom protection assembly as described in the first aspect above;

[0026] The battery pack is mounted on the bottom of the vehicle;

[0027] The bottom protection assembly is installed at the bottom of the battery pack to protect the bottom of the battery pack.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] This utility model provides a bottom protection component and vehicle. By adding protrusions to the four edges of the bottom guard plate, and designing the height of the protrusions to be greater than the height of the fasteners protruding from the bottom guard plate on the side away from the bottom of the battery pack, this not only strengthens the physical protection of the battery pack by the bottom guard plate, but also solves the problem of torque attenuation or even damage to the fasteners due to stress and pressure. This significantly improves the overall protection performance of the battery pack and enhances the service life, reliability and safety of electric vehicles in various environments.

[0030] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of a bottom protection component provided in Embodiment 1 of this utility model;

[0033] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0034] Figure 3 This is a structural schematic diagram of the bottom protective plate and the protrusion provided in Embodiment 1 of this utility model;

[0035] Figure 4 This is a structural schematic diagram from another perspective of a bottom protection component provided in Embodiment 1 of this utility model;

[0036] Figure 5 This is a schematic diagram of the structure of the protrusion, protective coating, and foam provided in Embodiment 1 of this utility model;

[0037] Figure 6 This is a schematic diagram of the structure of the foam provided in Embodiment 1 of this utility model;

[0038] Figure 7 This is a schematic diagram of the structure of the foam and fastener provided in Embodiment 1 of this utility model.

[0039] Figure label:

[0040] 1. Bottom guard plate; 2. Fasteners; 3. Mounting holes; 4. Protrusions; 5. Foam; 6. Cutouts; 7. Protective coating.

[0041] Tabletop 41, curved surface 42. Detailed Implementation

[0042] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0043] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0044] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0045] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0046] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0047] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0048] In this application, expressions such as "greater than", "less than", and "exceeding" are understood to exclude the stated number; expressions such as "above", "below", and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times", unless otherwise explicitly specified.

[0049] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0050] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0051] Example 1

[0052] Please refer to Figure 1-4 This utility model provides a bottom protection component for installation on the bottom of a battery pack. The component includes a bottom protection plate 1 and a fastener 2. The fastener 2 can be a bolt or other types of connectors.

[0053] The bottom protective plate 1 has several mounting holes 3 around its perimeter. The design of these holes facilitates the subsequent assembly of the bottom protective plate 1.

[0054] The fastener 2 is designed to pass through the mounting hole 3 from the side of the bottom cover plate 1 away from the bottom of the battery pack, thereby locking the bottom cover plate 1 to the bottom of the battery pack;

[0055] Of particular note is that the bottom protective plate 1 also has a protrusion 4 on its periphery, away from the bottom of the battery pack. The height of the protrusion 4 is precisely set to ensure that it is greater than the height of the fastener 2 protruding from the bottom protective plate 1 away from the bottom of the battery pack. If the fastener 2 is a bolt, then the head of the bolt should protrude from the bottom protective plate 1 away from the bottom of the battery pack. Figure 4 As shown, the fastener 2 protrudes from the bottom plate 1 at a height h away from the bottom of the battery pack, and the height of the protrusion 4 is H. Then H is greater than h, and Hh = d, where d is the height difference.

[0056] It should be noted that this embodiment innovatively adds protrusions 4 around the perimeter of the bottom protective plate 1. Through meticulous design of the height of these protrusions 4, making them greater than the height of the fastener 2 protruding from the bottom protective plate 1 away from the bottom of the battery pack, this measure not only significantly enhances the physical protection of the battery pack provided by the bottom protective plate 1, but also effectively isolates and protects the fastener 2 due to the presence of the protrusions 4. In other words, under this design, the protrusions 4 will bear external forces and pressures instead of the fastener 2, effectively avoiding the potential torque attenuation or even damage to the fastener 2 under stress and pressure. This innovative design greatly improves the overall protection performance of the battery pack, thereby extending the service life of the electric vehicle in various complex environments and significantly enhancing its reliability and safety.

[0057] Please refer to this again. Figure 1-4The detailed construction of this embodiment will be described below. In the specific implementation of this embodiment, the mounting hole 3 and the protrusion 4 are cleverly arranged adjacent to each other. This layout aims to maximize the use of the structural space of the bottom protective plate 1 while enhancing its functionality and protective performance. Specifically, the distance between the mounting hole 3 and the protrusion 4 is 50-60mm. This precise distance setting is the result of comprehensive consideration of multiple factors. From the perspective of structural strength, this distance ensures that when the bottom protective plate 1 is subjected to external forces, all parts can be evenly stressed, avoiding stress concentration, thereby ensuring the stability and reliability of the overall structure of the bottom protective plate 1. If the distance is too small, the structure between the mounting hole 3 and the protrusion 4 may be too compact, easily causing mutual interference under stress and affecting the structural strength; while if the distance is too large, it will increase the size of the bottom protective plate 1, leading to material waste, and will also increase the complexity of processing and increase production costs.

[0058] While ensuring structural strength, a distance of 50-60mm effectively avoids material waste and processing complexity. This appropriate distance allows for more precise cutting and shaping of the bottom guard plate 1 during manufacturing, reducing waste and improving material utilization. Simultaneously, this distance meets the requirements of the processing technology, enabling processing equipment to complete the processing of the bottom guard plate 1 more efficiently and accurately, reducing processing difficulty and costs, and improving production efficiency and product quality.

[0059] In summary, the design of mounting holes 3 and protrusions 4 being adjacent and precisely controlled at a distance of 50-60mm in this embodiment fully reflects the scientific and rational nature of the design. While maximizing the use of the structural space of the bottom protective plate 1, it significantly enhances its functionality and protective performance, providing a strong guarantee for the safe and stable operation of the battery pack.

[0060] In one embodiment of this invention, along the edge of the bottom protective plate 1, the mounting holes 3 and the protrusions 4 are arranged in an alternating manner, that is, a protrusion 4 is cleverly embedded between every two adjacent mounting holes 3.

[0061] This alternating layout not only ensures that the mounting holes 3 accurately align with the assembly points on the bottom of the battery pack, facilitating the smooth insertion and tightening of the fasteners 2, but also guarantees that the protrusions 4 are evenly distributed along the edge of the bottom protective plate 1, forming a robust protective barrier. The protrusions 4 not only increase the structural strength of the bottom protective plate 1, enabling it to better protect the battery pack from damage when subjected to external impacts, but also, because their height is designed to be higher than the protruding parts of the fasteners 2, they effectively buffer and isolate the fasteners 2 when subjected to potential collisions or pressure, thus significantly reducing the risk of damage to the fasteners 2.

[0062] In summary, through the carefully designed alternating layout of mounting holes 3 and protrusions 4, this embodiment not only optimizes the assembly convenience of the bottom guard plate 1, but also significantly enhances its physical protection capability for the battery pack.

[0063] In one embodiment of this invention, the protrusion 4 not only enhances the physical protection of the bottom protective plate 1 for the battery pack, but can also be used to avoid protrusions at the bottom of the battery pack.

[0064] As one of the core components of an electric vehicle, the battery pack has a complex internal structure containing numerous components with different functions. At the bottom of the battery pack, there are often protrusions that play a crucial role in its normal operation. For example, some of these protrusions may be fasteners used to secure the liquid cooling plate and the battery pack. The liquid cooling plate, positioned between the battery pack and the bottom protective plate 1, is essential for heat dissipation. It effectively dissipates the heat generated during charging and discharging, maintaining the battery within a suitable temperature range, thus ensuring battery performance and lifespan. The fasteners securing the liquid cooling plate and the battery pack ensure a stable connection between them, preventing displacement or loosening of the liquid cooling plate due to vibrations during vehicle operation, which could affect heat dissipation.

[0065] However, the presence of these protrusions also presents certain challenges to the design and installation of the bottom protective assembly of the battery pack. If there is no reasonable avoidance design between the bottom protective assembly and these protrusions, interference may occur during installation, making it impossible to install smoothly. During use, mutual collisions may also damage components, affecting the normal operation of the battery pack. Alternatively, the protrusions may be directly exposed, thereby reducing the reliability of the battery pack.

[0066] The protrusion 4 in this embodiment cleverly solves this problem. Its unique shape and position design allow the protrusion 4 to precisely avoid the protrusions at the bottom of the battery pack when installing the bottom cover plate 1. This avoidance design not only ensures that the bottom cover plate 1 can be smoothly and accurately installed at the bottom of the battery pack, but also provides sufficient space for the protrusions at the bottom of the battery pack to function properly, while also protecting the protrusions.

[0067] From another perspective, the avoidance function of the protrusion 4 also reflects the flexibility and adaptability of the design in this embodiment. Since different models and specifications of battery packs may differ in their bottom structure and the layout of the protrusions, this universal design of the protrusion 4 can better meet diverse market demands. Regardless of the type or size of the protrusions at the bottom of the battery pack, the protrusion 4 can achieve effective avoidance through appropriate adjustments and optimizations, ensuring the compatibility of the bottom protective components with the battery pack.

[0068] Furthermore, while avoiding protruding parts, the protrusion 4 does not sacrifice its protective function for the battery pack. On the contrary, it still forms an effective protective barrier at the edge of the bottom guard plate 1, resisting external forces such as impacts and collisions from the road surface. This design, which meets the avoidance requirements while taking into account the protective performance, fully demonstrates the innovative thinking in the design of the bottom protective component in this embodiment.

[0069] Please refer to this again. Figure 2-4 To gain a deeper understanding of a specific implementation method in this embodiment. In this embodiment, the protrusion 4 is not attached to the bottom cover plate 1 as a separate component, but is formed directly from the four edges of the bottom cover plate 1 by stamping in a direction away from the bottom of the battery pack through a specific manufacturing process.

[0070] This stamped protrusion 4 not only forms a tight and robust integrated structure with the main body of the bottom protective plate 1, thus ensuring the structural integrity and stability of the entire protective assembly, but also has a relatively simple manufacturing process and significant cost-effectiveness. Through the stamping process, the protrusion 4 can be precisely formed into the required shape and height according to the design requirements to meet the need for efficient protection of the bottom of the battery pack.

[0071] Furthermore, since the protrusions 4 are directly stamped from the material of the bottom cover plate 1, there are no seams or connection points between them, which further enhances the overall strength and durability of the bottom cover plate 1. When subjected to external impact, the protrusions 4 can more effectively disperse and absorb the impact force, thereby protecting the battery pack from damage.

[0072] In summary, by using the stamped protrusion 4, this embodiment not only simplifies the manufacturing process of the bottom guard plate 1 and reduces costs, but also significantly improves its protective performance for the battery pack.

[0073] Please refer to this again. Figure 4 In one embodiment of this invention, the protrusion 4 exhibits a specific design structure. It mainly consists of two parts: a platform 41 located away from the bottom of the battery pack, and an arc-shaped surface 42 connecting the platform 41 and the protective plate 1.

[0074] From a structural strength perspective, the platform 41 is of paramount importance. Its unique shape and position design allow it to effectively distribute stress when subjected to external forces, thereby improving the structural strength of the entire protrusion 4 and even the bottom guard plate 1. When the bottom guard plate 1 is subjected to impact or collision from the road surface, the platform 41 can act as a stable support surface, evenly transferring the external force to the surrounding structure and preventing structural damage caused by excessive local stress. This design not only enhances the impact resistance of the bottom guard plate 1 but also extends its service life, providing more reliable protection for the battery pack.

[0075] The design of the curved surface 42 is equally ingenious. Its smooth curve connects the platform 41 and the protective plate 1, not only making the protrusion 4 appear more rounded and aesthetically pleasing, but more importantly, playing a crucial role in mechanical performance. The curved surface 42 smoothly transitions stress, reducing stress concentration at the connection point and thus lowering the risk of fatigue fracture. Simultaneously, the curved surface 42 also possesses a certain degree of elastic deformation capability, absorbing some energy through its own deformation when subjected to external impact, further mitigating damage to the bottom protective plate 1 and the battery pack.

[0076] Understandably, placing the protrusion 4 at the edge of the underbody protection plate offers several advantages. First, it significantly enhances the protective capabilities of the underbody protection plate edge. During vehicle operation, the underbody protection plate edge is often susceptible to collisions and scratches; the protrusion 4 acts as a robust protective barrier, effectively resisting impacts from external objects and protecting the underbody protection plate edge from damage. Second, the protrusion 4 also achieves a crumple zone energy absorption function. When subjected to a large external impact, the protrusion 4 can absorb energy through its own deformation and crumple zone, reducing the impact force transmitted to the battery pack and thus lowering the likelihood of battery pack damage. This crumple zone energy absorption design is an important concept in modern automotive safety design, providing more comprehensive protection for the battery pack.

[0077] In this embodiment, the shape of the platform 41 has also been carefully considered; it is elliptical or racetrack-shaped. Both elliptical and racetrack-shaped surfaces have relatively regular geometric shapes and can better distribute stress when subjected to force. Compared with traditional rectangular or square platform surfaces, elliptical or racetrack-shaped platform surfaces do not exhibit significant stress concentration when subjected to external forces, and can more evenly bear external forces, thereby improving the stability and reliability of the structure.

[0078] Along a direction perpendicular to the plane of the bottom protective plate 1, the projection line of the edge of the bottom protective plate 1 passes through the elliptical or racetrack shape projected by the platform 41. This unique design is based on a deep understanding and application of mechanical principles. This design allows for stress redistribution, making the stress distribution more even on the protrusion 4 and preventing excessive stress concentration in certain areas. Stress concentration is one of the main causes of structural fatigue and damage. By redistributing stress, the occurrence of stress concentration can be effectively reduced, thereby improving the fatigue resistance and service life of the protrusion 4. Simultaneously, this design also reduces structural weight. Reducing structural weight while ensuring structural strength and protection is crucial for improving the energy efficiency and driving range of electric vehicles. By optimizing the shape and projection relationship of the platform 41, unnecessary material usage is reduced, achieving a lightweight structural design.

[0079] Furthermore, to achieve superior mechanical properties and structural performance, the projection line of the edge of the bottom guard plate 1 is perpendicular to the major axis of the ellipse projected onto the platform surface, or perpendicular to the straight edge of the racetrack shape. This perpendicular design allows for a more rational distribution of stress on the platform surface 41, further enhancing the load-bearing capacity of the protrusion 4. When external forces act on the bottom guard plate 1, the perpendicular projection line ensures that stress is transmitted along the optimal direction of the platform surface 41, reducing energy loss and structural deformation. Simultaneously, this design also improves the manufacturability of the protrusion 4, making the processing simpler and more accurate, and ensuring product quality and consistency.

[0080] In summary, in this embodiment, the structural design and placement of the protrusion 4, as well as the shape and projection relationship of the platform 41, demonstrate a high degree of scientific rigor and rationality. These ingenious designs not only enhance the structural strength and protective capabilities of the bottom protective plate 1, but also achieve multiple functions such as energy absorption through collapse, stress redistribution, and structural weight reduction, providing strong assurance for the safe operation of the battery pack.

[0081] Please refer to this again. Figure 2 and 4 Referring to references 5-7, a particular implementation of this embodiment can be fully understood. In this implementation, the components are further optimized by adding foam 5 as a key component.

[0082] Foam 5 is carefully placed between the bottom guard plate 1 and the battery pack. This design aims to further enhance the protective performance of the bottom guard plate 1 for the battery pack. As a high-performance cushioning material, foam 5 has excellent shock absorption and sound insulation properties, and can form an effective buffer layer between the bottom guard plate 1 and the battery pack.

[0083] When a vehicle travels on complex and varied road conditions, the underbody protection plate 1 may be subjected to various impacts and vibrations from the road surface. The presence of foam 5 can significantly absorb these impact energies, reduce the impact of vibrations on the battery pack, and thus protect the electronic components and structure inside the battery pack from damage.

[0084] In addition, foam 5 also has a certain sound insulation effect, which can reduce the noise generated during vehicle operation and provide a more comfortable riding environment for passengers. At the same time, the softness and elasticity of foam 5 can also accommodate any small gaps that may exist between the battery pack and the underbody protection plate 1, ensuring a tight fit between them, preventing dust, moisture and other impurities from entering, and keeping the battery pack clean and dry.

[0085] In summary, by adding the foam 5 design element, this embodiment not only significantly improves the protection capability of the underbody protection plate 1 for the battery pack, but also enhances the vehicle's sound insulation performance and ride comfort, making an important contribution to the overall performance improvement of electric vehicles.

[0086] Please refer to this again. Figure 2 , 6 -7. In one embodiment of this example, the design of the foam 5 has been further optimized. In particular, cutouts 6 are cleverly made on the four edges of the foam 5 corresponding to the positions of the protrusions 4 to surround the protrusions 4, so as to prevent mud, sand and foreign objects from entering between the bottom cover plate and the battery pack.

[0087] Given that the protrusion 4 shown in the accompanying drawings of this embodiment is semi-circular, the cutout 6 is also designed to be semi-circular to ensure a perfect match with the shape of the protrusion 4. This precise attention to design details aims to maximize the functional effectiveness of the cutout 6.

[0088] By making a cut 6 at the edge of the foam 5 corresponding to the protrusion 4, the foam material in that area is effectively removed. This seemingly minor modification is actually significant. When a vehicle travels on a wet road, splashed water droplets may come into contact with the protrusion 4. Due to the presence of the cut 6, the direct contact area between the foam 5 and these water droplets is greatly reduced, thereby reducing the risk of fastener 2 corrosion that may occur after the foam 5 absorbs water.

[0089] Fastener 2, as a key component connecting the bottom cover plate 1 to the bottom of the battery pack, is crucial for stability and durability. If fastener 2 corrodes due to water absorption by the foam 5, the connection may loosen, affecting the protective effect of the bottom cover plate 1 on the battery pack. Therefore, the innovative design of the cutout 6 effectively prevents this problem, ensuring the robustness and reliability of the connection between the bottom cover plate 1 and the battery pack.

[0090] In summary, this embodiment, through the carefully designed cutout 6, not only improves the practicality of the foam 5, but also further enhances the protective performance of the bottom protective plate 1 for the battery pack.

[0091] In one specific embodiment of this example, the design specifications of the cutout 6 are further refined to ensure that it can function more effectively. In particular, this embodiment specifies the projected area of ​​the cutout 6 in a direction perpendicular to the plane of the foam 5, and this area is designed to be equal to or greater than the projected area of ​​the protrusion 4 in the same direction.

[0092] This meticulous design detail aims to minimize contact between the foam 5 and the area around the protrusion 4 where water may splash. When the projected area of ​​the cut 6 is equal to or greater than the projected area of ​​the protrusion 4, even if water droplets splash near the protrusion 4, direct contact with the foam 5 can be avoided to the greatest extent possible.

[0093] Please refer to this again. Figure 5 This allows for a deeper understanding of another important innovation in the design of the bottom protective plate 1 in this embodiment. In this embodiment, the side of the bottom protective plate 1 away from the bottom of the battery pack is specially treated and coated with a high-performance protective coating 7.

[0094] The introduction of this protective coating 7 aims to further enhance the bottom guard plate 1's resistance to external impacts, while providing excellent insulation properties to effectively prevent electrochemical corrosion. This is crucial for protecting critical components such as the battery pack beneath the bottom guard plate 1 from damage.

[0095] In selecting coating materials, corrosion-resistant and wear-resistant epoxy resin or polyurethane coatings were given priority. These materials are known for their excellent durability and protective performance, and can meet the protection requirements of the underbody protection plate 1 in the complex and ever-changing vehicle operating environment.

[0096] In particular, a two-component epoxy resin coating is more preferably selected in this embodiment. Two-component epoxy resin coating stands out for its excellent adhesion, chemical resistance, and good insulation properties. It can adhere tightly to the surface of the bottom protective plate 1, forming a tough and dense protective barrier that effectively resists external impacts, abrasion, and chemical corrosion.

[0097] In summary, by applying the high-performance protective coating 7, this embodiment not only significantly improves the protective capability of the underbody protection plate 1, but also provides more reliable protection for key components such as the battery pack beneath it. This innovative design further enhances the safety and durability of electric vehicles, laying a solid foundation for users' peace of mind when traveling.

[0098] In a more detailed embodiment of this invention, the protection of the protrusion 4 is particularly reinforced. Specifically, the thickness of the protective coating 7 applied to the protrusion 4 is designed to be greater than the coating thickness of the rest of the bottom protective plate 1. This design detail aims to enhance the protection of the relatively vulnerable area, namely the protrusion 4, as it may be more susceptible to damage from external impacts. By increasing the coating thickness, the wear resistance, corrosion resistance, and insulation properties of the protrusion 4 can be more effectively improved, thereby extending the service life of the entire bottom protective plate 1.

[0099] To achieve precise control of coating thickness and reduce material waste, electrostatic spraying technology can be used. Electrostatic spraying ensures that the coating is evenly distributed on the surfaces of the base plate 1 and the protrusion 4, while simultaneously enabling precise control of the coating thickness. This technology not only improves coating adhesion and durability but also significantly reduces material loss and environmental pollution during the production process.

[0100] Furthermore, this embodiment places particular emphasis on the coating curing process. Ensuring the coating is fully cured after spraying is crucial, as only a fully cured coating can achieve optimal protective performance. Therefore, after the coating is sprayed, appropriate curing measures, such as heating or natural drying, are required to ensure the coating fully cures and fulfills its intended protective function.

[0101] In summary, by specifically enhancing the coating thickness of the protrusion 4 and employing electrostatic spraying technology, this embodiment not only improves the overall protective performance of the underbody protection plate 1 but also achieves high efficiency, environmental friendliness, and cost control in the production process. This innovative design further enhances the reliability and durability of the electric vehicle underbody protection plate 1.

[0102] In one highly innovative embodiment of this invention, a ceramic particle-reinforced composite coating is used as a protective layer for the bottom plate 1 and the protrusion 4.

[0103] Ceramic particle-reinforced composite coating is a high-performance protective material that significantly enhances the wear resistance and scratch resistance of the coating by incorporating fine ceramic particles into traditional coating materials. These fine ceramic particles form a robust barrier within the coating, effectively resisting external wear and scratches and protecting the bottom plate 1 and the raised portion 4 from damage.

[0104] Compared to traditional coating materials, ceramic particle-reinforced composite coatings offer superior durability and protective performance. They not only better resist external impacts and abrasion but also provide excellent insulation and chemical resistance, ensuring stable protection for the bottom plate 1 and the raised portion 4 in various complex environments.

[0105] Furthermore, the preparation process of the ceramic particle-reinforced composite coating is relatively simple and controllable. The type, size, and distribution of ceramic particles can be adjusted according to specific application requirements and the material properties of the base plate 1 to achieve the best protective effect.

[0106] In summary, by employing a ceramic particle-reinforced composite coating as the protective layer for the underbody 1 and the protrusion 4, this embodiment not only significantly improves the coating's wear resistance and scratch resistance but also further enhances the overall protective performance of the underbody 1. This innovative design not only provides more reliable protection for the underbody 1 of electric vehicles but also offers new ideas and solutions for other fields requiring high-performance protective coatings.

[0107] Although this application frequently uses terms such as bottom guard plate, fastener, and mounting hole, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

[0108] This utility model provides a bottom protection component that adds protrusions to the four edges of the bottom guard plate. The height of the protrusions is designed to be greater than the height of the fasteners protruding from the bottom guard plate on the side away from the bottom of the battery pack. This not only strengthens the physical protection of the battery pack by the bottom guard plate, but also solves the problem of torque attenuation or even damage to the fasteners due to stress and pressure. This significantly improves the overall protection performance of the battery pack and enhances the service life, reliability, and safety of electric vehicles in various environments.

[0109] Example 2

[0110] Embodiment 2 of this utility model provides a vehicle that cleverly incorporates the bottom protection component provided in Embodiment 1, thereby achieving effective protection for the bottom of the vehicle, especially the battery pack.

[0111] In this vehicle, the battery pack is mounted at the bottom, a common layout for electric vehicles designed to maximize interior space while ensuring the safety and stability of the battery pack. However, as a core component of an electric vehicle, the battery pack's safety is paramount and therefore requires effective protection.

[0112] To address this issue, Embodiment 2 of this invention introduces the bottom protection component described in Embodiment 1. This bottom protection component is cleverly installed at the bottom of the battery pack, precisely beneath it, forming a robust protective barrier. The bottom guard plate 1 of the bottom protection component effectively resists impacts and vibrations from the road surface, protecting the battery pack from damage. Simultaneously, the design of the raised portions 4 on the four edges of the bottom guard plate 1 can also replace the fasteners 2 in bearing external forces and pressures, thereby effectively avoiding the potential torque attenuation or even damage to the fasteners 2 under stress and pressure, thus enhancing the protective effect.

[0113] In summary, the vehicle provided in Embodiment 2 of this utility model effectively protects the bottom of the battery pack by cleverly incorporating the bottom protection component from Embodiment 1. This innovative design not only improves vehicle safety but also further enhances the reliability and durability of electric vehicles, providing users with a safer and more reliable travel experience.

[0114] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A bottom protection assembly for mounting on the bottom of a battery pack, characterized in that, The component includes a bottom guard plate (1) and fasteners (2); wherein, The bottom protective plate (1) has mounting holes (3) around its four edges; The fastener (2) passes through the mounting hole (3) from the side of the bottom cover plate (1) away from the bottom of the battery pack to lock the bottom cover plate (1) to the bottom of the battery pack; The bottom guard plate (1) is also provided with a protrusion (4) on the side away from the bottom of the battery pack around its perimeter. The height of the protrusion (4) is greater than the height of the fastener (2) protruding from the bottom guard plate (1) away from the bottom of the battery pack.

2. The bottom protection assembly according to claim 1, characterized in that, The mounting hole (3) is disposed adjacent to the protrusion (4), and the distance between the mounting hole (3) and the protrusion (4) is 50-60mm.

3. The bottom protection assembly according to claim 1, characterized in that, Along the edge of the bottom guard plate (1), the mounting holes (3) and the protrusions (4) are alternately arranged, and the protrusions (4) can be used to avoid the protrusions at the bottom of the battery pack.

4. The bottom protection assembly according to claim 1, characterized in that, The protrusion (4) includes a platform (41) away from the bottom of the battery pack and an arcuate surface (42) connecting the platform and the bottom guard plate (1); the platform (41) is elliptical or racetrack-shaped; in a direction perpendicular to the plane of the bottom guard plate (1), the projection line of the edge of the bottom guard plate (1) passes through the elliptical or racetrack shape projected by the platform (41).

5. The bottom protection assembly according to claim 4, characterized in that, The projection line of the edge of the bottom guard plate (1) is perpendicular to the major axis of the ellipse of the table surface projection, or perpendicular to the straight side of the racetrack shape.

6. The bottom protection assembly according to claim 1, characterized in that, The component also includes foam (5); The foam (5) is disposed between the bottom guard plate (1) and the battery pack. The four edges of the foam (5) are provided with cutouts (6) corresponding to the position of the protrusion (4) to surround the protrusion (4).

7. The bottom protection assembly according to claim 6, characterized in that, In a direction perpendicular to the plane of the foam (5), the projected area of ​​the cut (6) is equal to or greater than the projected area of ​​the protrusion (4).

8. The bottom protection assembly according to claim 1, characterized in that, The bottom protective plate (1) is coated with a protective coating (7) on the side away from the bottom of the battery pack.

9. The bottom protection assembly according to claim 7, characterized in that, The thickness of the protective coating (7) applied to the protrusion (4) is greater than the thickness of the protective coating (7) at other locations.

10. A vehicle, characterized in that, Includes a battery pack and a bottom protection assembly as described in any one of claims 1-9; The battery pack is mounted on the bottom of the vehicle; The bottom protection assembly is installed at the bottom of the battery pack.

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