Vehicle chassis and vehicle

Abstract

The utility model discloses a vehicle chassis and a vehicle, relates to the technical field of vehicles, and solves the problems of complex structure and inconvenience in maintenance of parts for mounting batteries of the vehicle in the prior art. The vehicle chassis comprises a floor and a connecting beam, the connecting beam is arranged on the side, in the height direction of the vehicle, of the floor, the connecting beam is detachably connected with the floor, and the side, back to the floor, of the connecting beam is used for installing a battery of the vehicle.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to vehicle chassis and vehicles. Background Technology

[0002] With the rapid development of the automotive industry, electrification has become an important direction for the development of vehicle power systems, and more and more vehicles are adopting electric drive to achieve the goal of energy saving and high efficiency.

[0003] In existing technologies, batteries are typically added to vehicles as a power source. A common technical solution is to install the battery directly on the vehicle floor. However, this solution tends to generate significant noise during vehicle operation, which not only seriously affects ride comfort but may also pose a potential threat to vehicle safety.

[0004] To address the aforementioned technical problems, existing technologies propose an improved solution involving installing a crossbeam on the vehicle floor to mount the battery. While this solution can reduce noise to some extent, the complex crossbeam connection structure significantly increases costs during vehicle maintenance or battery replacement, hindering its widespread application. Utility Model Content

[0005] One objective of this utility model is to provide a vehicle chassis to solve the problem of complex structure and inconvenient maintenance of battery installation components in related technologies; the other objective is to provide a vehicle.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] In a first aspect, this application provides a vehicle chassis, which includes a floor and a connecting beam. The connecting beam is disposed on one side of the floor along the vehicle height direction, and the connecting beam is detachably connected to the floor. The side of the connecting beam facing away from the floor is used to install the vehicle's battery.

[0008] Based on the aforementioned technical means, this application provides a detachable connecting beam on one side of the vehicle floor along the height direction, and installs the battery on the side of the connecting beam facing away from the floor. On the one hand, the detachable connection between the connecting beam and the floor forms a two-layer support structure, which can disperse the impact of the battery weight on the floor, change the vibration transmission path, reduce the floor vibration amplitude, and absorb high-frequency vibration noise, thereby reducing noise during vehicle operation. On the other hand, the detachable connection between the connecting beam and the floor means that only the connecting parts need to be removed when repairing or replacing the battery, without structural damage to the floor itself, thus reducing repair or replacement costs.

[0009] As one possible implementation, the floor includes a first sill beam and a second sill beam spaced apart along the vehicle width direction, and a base plate, with the base plate connected between the first sill beam and the second sill beam; a connecting beam is connected between the first sill beam and the second sill beam, and the connecting beam is detachably connected to both the first sill beam and the second sill beam, and the connecting beam is located above the base plate and is detachably connected to the base plate.

[0010] Based on the aforementioned technical means, the first and second sill beams in this application serve as the main load-bearing structures of the vehicle chassis. The connection beams with these beams can fully utilize the original structural strength, distribute the load generated by the battery weight, enhance the overall rigidity of the chassis, and further reduce vibration and noise. On the other hand, the detachable connection method not only facilitates battery installation, maintenance, and replacement, reducing maintenance costs, but also allows for flexible adjustment of the connection beams and battery layout according to different vehicle models or battery specifications, improving the versatility and platform adaptability of the chassis design. At the same time, it facilitates the independent upgrading or replacement of various components, extending the service life of the chassis.

[0011] As one possible implementation, the connecting beam is a roll-formed component.

[0012] Based on the above-mentioned technical means, the roll forming process can precisely control the cross-sectional shape and dimensional accuracy of the connecting beam through continuous roll forming, ensuring the high strength of the connecting beam while reducing its weight.

[0013] As one possible implementation, the connecting beam is a hollow structure.

[0014] Based on the aforementioned technical means, the hollow structure reduces the weight of the connecting beam while ensuring its strength and rigidity, which aligns with the vehicle's lightweight design and helps reduce overall vehicle energy consumption and increase driving range.

[0015] As one possible implementation, the cross-section of the connecting beam is a closed section.

[0016] Based on the above technical means, the closed section forms a complete stress closed loop through continuous boundaries, which can effectively resist torsional and bending deformation. When bearing the weight of the battery and the complex loads during vehicle operation, it improves the structural stability of the whole vehicle and ensures the reliability of battery installation.

[0017] As one possible implementation, the base plate is connected to the surface of the first sill beam facing the second sill beam, and the base plate is connected to the surface of the second sill beam facing the first sill beam.

[0018] Based on the above technical means, the first sill beam and the second sill beam are key load-bearing components of the vehicle chassis. The floor plate is closely connected with the first sill beam and the second sill beam to form a stable frame structure, which can evenly distribute the load from the vehicle body and battery and other components, and reduce local stress concentration.

[0019] As one possible implementation, the connecting beam includes a first part, a second part, and a third part connected in sequence. The first part is connected to a first sill beam, the second part is connected to a second sill beam, and the third part is connected to a floor plate. Along the height direction of the vehicle, the third part is higher than the bottom surface of the first sill beam and lower than the top surface of the first sill beam; and / or, along the height direction of the vehicle, the third part is higher than the bottom surface of the second sill beam and lower than the top surface of the second sill beam.

[0020] Based on the aforementioned technical means, this application effectively transfers the battery load to the chassis through a three-point connection. The load-bearing capacity of the first sill beam towards the second sill beam enhances the overall rigidity of the chassis. The third part is located between the bottom and top surfaces of the sill beam, avoiding direct overlap between the connecting beam and the sill beam in the height direction, thus reducing the vertical space occupied by the chassis. Through the staggered design, the connecting beam can be flexibly inserted into the gap between the sill beam and the floor plate, which is especially suitable for scenarios where the chassis space is narrow or multiple components (such as battery packs and pipelines) need to be integrated, thereby improving the flexibility of the chassis layout.

[0021] As one possible implementation, the first part is connected to the top surface of the first sill beam, and the second part is connected to the top surface of the second sill beam.

[0022] According to the above technical means, the connecting beam is connected to the top surface of the first sill beam facing the second sill beam, which can directly transfer the weight of the battery and the dynamic load during driving to the chassis. The high strength characteristics of the first sill beam facing the second sill beam disperse the stress and enhance the overall rigidity and deformation resistance of the chassis.

[0023] As one possible implementation, the connecting beam is provided with multiple mounting holes, which are arranged along the direction from the first threshold beam to the second threshold beam.

[0024] Based on the above-mentioned technical means, multiple mounting holes can be flexibly adapted to batteries of different specifications and sizes. By adjusting the battery mounting position and fixing method, diverse battery layout requirements can be met, enhancing the versatility of the chassis design.

[0025] As one possible implementation, the connecting beam is a sheet metal component.

[0026] Based on the above-mentioned technical means, the connecting beam made of sheet metal is easy to pre-drill mounting holes, which facilitates assembly with components such as the first sill beam, the second sill beam, and the base plate, thereby improving production efficiency.

[0027] Secondly, this application provides a vehicle including a vehicle chassis and a battery pack as described in any possible implementation of the first aspect, wherein the battery pack is detachably connected to a connecting beam, and the battery panel and the base plate are disposed on opposite sides of the connecting beam along the vehicle direction.

[0028] Based on the above-mentioned technical means, the vehicle chassis of the vehicle in this application is not only low in cost and light in weight and reliable in structure, but also improves low-frequency structural road noise, and has high application value.

[0029] The beneficial effects of this utility model are:

[0030] (1) The present application adopts a combination design of a specific vehicle chassis and battery pack, which detachably connects the vehicle floor and the connecting beam. This facilitates the installation, inspection and replacement of the battery, reduces maintenance costs, and transfers the weight of the battery to the chassis through the connecting beam, thereby enhancing the rigidity and stability of the vehicle structure.

[0031] (2) The layout of the battery panel and the base plate in this application, which are located on both sides of the connecting beam, can form a physical isolation layer by using the connecting beam, reducing the direct impact of road bumps and vibrations on the battery pack, reducing noise transmission, and improving driving comfort.

[0032] It should be noted that the technical effects of the second implementation method can be found in the technical effects of the corresponding implementation method in the first aspect, and will not be repeated here.

[0033] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of a vehicle chassis provided in an embodiment of this application;

[0035] Figure 2 for Figure 1 A schematic diagram of the connecting beam of the vehicle chassis shown.

[0036] Figure 3 for Figure 1 The image shows a simulation diagram of the vehicle chassis.

[0037] Reference numerals: 100-floor; 101-first sill beam; 102-second sill beam; 103-base plate; 200-connecting beam; 201-first part; 202-second part; 203-third part; 204-mounting hole; 300-battery pack. Detailed Implementation

[0038] The technical solutions in some embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.

[0039] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and its other forms, such as the third-person singular "comprises" and the present participle "comprising," are interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "some embodiments," "example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, a particular feature, structure, material, or characteristic may be included in any suitable manner in any one or more embodiments or examples.

[0040] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0042] In some embodiments, this application provides a vehicle, which includes a vehicle chassis. The vehicle chassis is a basic component of a car, equivalent to the "skeleton" of the car, and is mainly used to support the body, install the engine and other components, and transmit and bear the power and load of the vehicle.

[0043] In this application embodiment, the specific type of vehicle is not specifically limited. For example, the vehicle provided in this application embodiment can be an electric vehicle or a hybrid electric vehicle.

[0044] Of course, the vehicle provided in this application embodiment can also be a vehicle of different types. For example, the vehicle provided in this application embodiment can be a sedan, a sport utility vehicle (SUV), or a multi-purpose vehicle (MPV), etc.

[0045] In some embodiments, see Figure 1 The vehicle in this application also includes a battery pack 300, which is mounted on the vehicle chassis. The battery pack 300 is used to store electrical energy and provide power to the vehicle to ensure that the vehicle can operate normally.

[0046] In some embodiments, see Figure 1 The vehicle chassis includes a floor 100 and a connecting beam 200. The connecting beam 200 is located on one side of the floor 100 along the vehicle height direction. The connecting beam 200 is detachably connected to the floor 100. The side of the connecting beam 200 facing away from the floor 100 is used to install the vehicle's battery.

[0047] Along one side of the vehicle floor 100 along its height direction, the connecting beam 200 is fixed to the floor 100. The battery is then installed on the side of the connecting beam 200 facing away from the floor 100, ensuring a secure connection. During vehicle operation, the two-layer structure formed by the connecting beam 200 and the floor 100 disperses loads and absorbs vibrations. When battery maintenance or replacement is required, the connection between the connecting beam 200 and the floor 100 can be easily removed for battery access.

[0048] Based on this, this application provides a detachable connecting beam 200 on one side of the vehicle floor 100 along the height direction, and installs the battery on the side of the connecting beam 200 facing away from the floor 100. From a noise reduction perspective, the detachable connection between the connecting beam 200 and the floor 100 constructs a two-layer support structure. This structure can disperse the impact of the battery weight on the floor 100, reduce the vibration amplitude of the floor 100 by changing the vibration transmission path, absorb the noise generated by high-frequency vibration, and thus reduce the noise during vehicle operation.

[0049] Meanwhile, the detachable connection between the two components means that when repairing or replacing the battery, only the connector needs to be removed, avoiding structural damage to the floor 100 itself and reducing repair or replacement costs.

[0050] For example, the connecting beam 200 is connected to the floor 100 by bolts.

[0051] In another example, the connecting beam 200 is connected to the floor 100 by a locking mechanism.

[0052] In some embodiments, see Figure 1 The floor 100 includes a first sill beam 101 and a second sill beam 102 spaced apart along the width of the vehicle, and a base plate 103. The base plate is connected between the first sill beam 101 and the second sill beam 102. A connecting beam 200 is connected between the first sill beam 101 and the second sill beam 102. The connecting beam 200 is detachably connected to both the first sill beam 101 and the second sill beam 102. The connecting beam 200 is located above the base plate and is detachably connected to the base plate.

[0053] On this basis, the connecting beam 200 of the present application is connected to the first sill beam 101 and the second sill beam 102, and the bottom plate 103 provides connection strength for the first sill beam 101 and the second sill beam 102, so that the load generated by the battery weight can be evenly dispersed by virtue of the inherent structural strength of the first sill beam 101 and the second sill beam 102, improving the overall rigidity of the chassis and significantly reducing vibration and noise during driving.

[0054] Meanwhile, the detachable connection design between the connecting beam 200 and the first sill beam 101, the second sill beam 102, and the floor 100 not only makes the installation, maintenance, and replacement of the battery convenient, reduces the maintenance cost, but also can adapt to different vehicle models and battery specifications. By adjusting the layout of the connecting beam 200 and the battery, the versatility of the chassis can be enhanced, facilitating independent upgrade of each component, and effectively extending the service life of the vehicle chassis.

[0055] In some embodiments, please refer to Figure 1 , the connecting beam 200 is a rolled part.

[0056] On this basis, the cross-sectional shape and size of the connecting beam 200 can be controlled during the rolling process to meet the requirements of the vehicle chassis. At the same time, during the rolling process, the internal structure of the connecting beam 200 is densified and the grains are refined, achieving a balance between lightweight and high rigidity while ensuring high strength, and enhancing the bearing capacity for the battery weight and driving vibration.

[0057] In some embodiments, please refer to Figure 1 , the connecting beam 200 is of a hollow structure.

[0058] On this basis, the hollow-structured connecting beam 200 is also beneficial for absorbing vibration and noise. Through the buffering of the air layer, the vibration and noise transmitted into the vehicle during driving are reduced, improving the ride comfort. Moreover, the hollow structure can significantly reduce the material usage of the connecting beam 200, reducing the self-weight of the connecting beam 200 on the premise of ensuring the structural strength of the connecting beam 200, and effectively reducing the burden on the vehicle chassis.

[0059] Among them, the present application takes the cross-section of the connecting beam 200 as a "square" shape for exemplary illustration. Of course, the cross-section of the connecting beam 200 can also be other shapes, and the present application does not limit this.

[0060] In some embodiments, please refer to Figure 1 , the cross-section of the connecting beam 200 is a closed cross-section.

[0061] On this basis, the material distribution of the closed cross-section is uniform, the sectional moment of inertia is larger, it can withstand greater bending loads, reduce the deformation of the beam body of the connecting beam 200, and improve the overall rigidity of the chassis.

[0062] It should be noted that this application does not limit the cross-sectional shape of the connecting beam 200.

[0063] In some embodiments, see Figure 1 The base plate 103 is connected to the surface of the first threshold beam 101 facing the second threshold beam 102, and the base plate 103 is connected to the surface of the second threshold beam 102 facing the first threshold beam 101.

[0064] Based on this, the base plate 103 in this application forms a closed-loop frame structure with the first sill beam 101 and the second sill beam 102, which enhances the overall rigidity and torsional resistance of the chassis, can resist the torsion and bumps during vehicle operation, and ensures that the chassis is not easily deformed under complex working conditions.

[0065] In terms of load-bearing capacity, the connection between the first threshold beam 101, the second threshold beam 102 and the two sides of the base plate 103 can evenly distribute the load above the chassis to the first threshold beam 101 and the second threshold beam 102, avoiding local stress concentration.

[0066] In some embodiments, see Figure 1 and combined Figure 2 The connecting beam 200 includes a first part 201, a second part 202, and a third part 203 connected in sequence. The first part 201 is connected to the first sill beam 101, and the second part 202 is connected to the second sill beam 102. Along the height direction of the vehicle, the third part 203 is higher than the bottom surface of the first sill beam 101 and lower than the top surface of the first sill beam 101; and / or, along the height direction of the vehicle, the third part 203 is higher than the bottom surface of the second sill beam 102 and lower than the top surface of the second sill beam 102.

[0067] Based on this, when the vehicle encounters a side collision, the first door sill beam 101 and the second door sill beam 102 can absorb and disperse the impact energy, forming a buffer barrier, reducing the direct impact of external forces on the third part 203 of the connecting beam 200, thereby protecting the floor 103 and battery pack 300 connected to the third part 203.

[0068] Meanwhile, the third part 203 is located between the bottom and top surfaces of the first threshold beam 101 and the second threshold beam 102, avoiding direct overlap between the connecting beam 200 and the first threshold beam 101 and the second threshold beam 102 in the height direction, reducing its occupation in vertical space. Through the staggered design, the connecting beam 200 can be flexibly inserted into the gap between the first threshold beam 101, the second threshold beam 102 and the base plate 103, which is especially suitable for scenarios with narrow space or where multiple components (such as battery packs and pipelines) need to be integrated, thus improving the flexibility of the layout.

[0069] Compared to the directly suspended connecting beam 200, the third part 203, the first part 201, and the second part 202 are misaligned in the height direction, causing the connecting beam 200 to form a concave structure. The stress originally concentrated in the suspended part is dispersed to the main load-bearing components such as the first threshold beam 101 and the bottom plate 103 through the "stepped" structure formed by the misalignment, reducing the phenomenon of local stress concentration. In terms of structural characteristics, the concave part is equivalent to adding a reinforcing rib to the connecting beam 200, increasing the moment of inertia and section modulus of the connecting beam 200, effectively improving its bending and torsional resistance. The concave structure allows the connecting beam 200 to transfer the load to both sides when under stress, enhancing the overall rigidity.

[0070] In some embodiments, see Figure 1 and combined Figure 2 The first part 201 is connected to the top surface of the first threshold beam 101, and the second part 202 is connected to the top surface of the second threshold beam 102.

[0071] Based on this, the first part 201 is connected to the top surface of the first sill beam 101, and the second part 202 is connected to the top surface of the second sill beam 102. The overlapping of the top surfaces makes the contact area between the connecting beam 200 and the sill beam larger, which can evenly distribute the vertical load of components such as the battery pack 300 and avoid stress concentration.

[0072] In some embodiments, see Figure 1 and combined Figure 2 The connecting beam 200 is provided with multiple mounting holes 204, which are arranged along the direction from the first threshold beam 101 to the second threshold beam 102.

[0073] Building upon this, multiple mounting holes 204 enhance the vehicle chassis's adaptability, making it compatible with batteries of different specifications and sizes. By changing the battery's mounting position and adjusting the fixing method, it can be precisely installed regardless of whether it is a prismatic, pouch, or cylindrical battery, thus meeting diverse battery layout requirements.

[0074] In some embodiments, see Figure 1 The connecting beam 200 is a sheet metal part.

[0075] Based on this, the connecting beam 200 of the sheet metal manufacturing can be easily pre-fabricated with various mounting holes 204. Through the pre-machined holes, the connecting beam 200 can be quickly positioned and assembled with the first sill beam 101, the second sill beam 102 and the base plate 103, improving production assembly efficiency and shortening the vehicle manufacturing cycle.

[0076] Furthermore, this application also analyzes the improved vehicle chassis. For a single-degree-of-freedom damped system, the theoretical formula for the response transfer function is as follows:

[0077] (1)

[0078] In formula (1), X is the system response, F is the system excitation, K is the system stiffness, Wn is the natural frequency, and η is the system damping.

[0079] As shown in formula (1), when the excitation frequency is close to the system's natural frequency, the system will resonate, and the amplitude will reach a maximum value. The magnitude of the amplitude is related to the damping. The effective means to suppress the system amplitude is to avoid the frequency or improve the system transfer function. Therefore, changing the modal frequency of battery pack 300 or suppressing the amplitude of key points of battery pack 300 can effectively improve the low-frequency road noise performance.

[0080] By decomposing the above indicators into the installation structure of the battery pack 300, road noise performance can be improved through the control of the installation structure of the battery pack 300. The modal frequency of the battery pack 300 is determined by the stiffness of the connecting beam 200, and the stiffness of the connecting beam 200 is mainly affected by the size and thickness of the connecting beam 200. Therefore, the modal frequency of the battery pack 300 can be adjusted by changing the cross-sectional dimensions and thickness of the connecting beam 200.

[0081] Based on this, please see Figure 1 The following experiments were conducted in this application, and the specific steps are as follows:

[0082] Step 101: Determine the risk frequency points in the road noise results contributed by the battery pack 300 structure through the whole vehicle road noise virtual simulation model.

[0083] In this step, this application uses a virtual simulation model of vehicle road noise to simulate and analyze the road noise caused by the battery pack 300 structure during vehicle operation, and identifies specific frequency points with abnormally prominent noise that may affect driving comfort. These frequency points are the risk frequency points.

[0084] Step 102: Determine the optimal modal frequency of the power battery through a virtual simulation model of the vehicle road noise.

[0085] In this step, this application uses a virtual simulation model of the whole vehicle road noise, combined with the overall performance requirements and comfort goals of the vehicle, to simulate, analyze and determine the optimal modal frequency at which the power battery can minimize the adverse effects on road noise.

[0086] Step 103: Establish a simulation model of the battery pack 300 and the connecting beam 200. By changing the cross-sectional dimensions and thickness of the connecting beam 200 and inputting them into the simulation model, different modal frequencies of the battery pack 300 are obtained. If the battery pack 300 modes reach the predetermined modal frequencies, the cross-sectional dimensions and thickness of the connecting beam 200 are determined. If the battery pack 300 modes do not reach the predetermined modal frequencies, the cross-sectional dimensions and thickness of the connecting beam 200 are continued to be changed until the battery pack 300 modes reach the predetermined modal frequencies.

[0087] In this step, this application constructs a simulation model of the battery pack 300 and the connecting beam 200, using the connecting beam 200 as a variable. By continuously adjusting its cross-sectional dimensions and thickness, the influence on the modal frequencies of the battery pack 300 is observed. After each adjustment, the new parameters are substituted into the model for calculation. When the modal frequency of the battery pack 300 is consistent with the optimal modal frequency determined in step 102, the cross-sectional dimensions and thickness of the connecting beam 200 are locked at this time; if they are inconsistent, the parameters are adjusted and the calculation is repeated until the target modal frequency is reached.

[0088] Step 104: Input the simulation models of the connecting beam 200 and battery pack 300 that have reached the predetermined modal frequencies into the virtual simulation model of the vehicle road noise. If the road noise risk frequency meets the standard, the solution is determined. If it does not meet the standard, repeat steps 101-104 above until the road noise result meets the standard.

[0089] In this step, the simulation models of the connecting beam 200 and battery pack 300 with the determined parameters are again placed into the virtual simulation model of the vehicle road noise to verify whether the noise level at the previously identified risk frequency points meets the set standards. If it meets the standards, it indicates that the current design scheme of the connecting beam 200 is feasible; if it does not meet the standards, the process restarts from step 101, re-analyzing the risk frequency points, optimizing the power battery mode frequency, and adjusting the parameters of the connecting beam 200, iterating continuously until the road noise results meet the requirements.

[0090] Please see Figure 1 and combined Figure 3 , Figure 3 The horizontal axis represents the frequency of the sound (Hz). Figure 3 The vertical axis represents the noise response value (dBA, decibels), that is, the noise response value generated by the vehicle during operation. Figure 3 L1 represents the noise optimization result in the relevant techniques. Figure 3 L2 in the figure represents the noise optimization result in this application. It can be seen that, compared with the prior art, the chassis noise in this application has been further optimized.

[0091] In addition, this application also provides a method for installing the connecting beam 200, the specific steps of which are as follows:

[0092] In step A1, the connecting beam 200 is formed by roll forming, and its cross-section is U-shaped. The mounting holes 204 at both ends of the connecting beam 200 are connected to the first sill beam 101 and the sill beam by bolts.

[0093] For example, the connecting beam 200 is manufactured using a roll forming process, forming a closed cross-section structure in the form of a square during continuous roll forming. After forming, mounting holes 204 are machined at both ends of the connecting beam 200, and it is fastened to the first sill beam 101 and the second sill beam 102 by bolts, thereby realizing the installation and fixation of the connecting beam 200 on the chassis.

[0094] Step A2: The battery pack 300 is connected to the mounting shell in the middle of the connecting beam 200 by bolts. The mounting hole 204 is a reserved hole for a larger battery pack 300.

[0095] For example, a mounting shell is provided at the middle position of the connecting beam 200, and the battery pack 300 is fixedly connected to the mounting shell by bolts. At the same time, the size of the mounting hole 204 is designed to accommodate the possibility of using a larger battery pack 300 in the future, and provides room for adaptation to allow for subsequent upgrades or replacements of the battery pack 300.

[0096] Step A3: Install the battery pack 300 and the connecting beam 200. In addition to connecting the two rear mounting points to the connecting beam 200 with bolts, it can also be connected to the base plate 103 through multiple bolt structures.

[0097] For example, during the installation of the battery pack 300 and the connecting beam 200, the two mounting points at the rear end of the battery pack 300 are fixed to the connecting beam 200 by bolts; in addition, the battery pack 300 is also connected to the vehicle floor 103 by multiple bolts, forming a multi-point fixed connection method to enhance the stability of the battery pack 300 installation.

[0098] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely illustrative descriptions of the application as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from the spirit and scope of this application. Thus, if such modifications and modifications fall within the scope of the claims and their equivalents, this application also intends to include such modifications and modifications. Any changes or substitutions within the scope of the technology disclosed in this application should be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A vehicle chassis, characterized in that, include: Floor (100); A connecting beam (200) is provided on one side of the floor (100) along the vehicle height direction. The connecting beam (200) is detachably connected to the floor (100). The side of the connecting beam (200) facing away from the floor (100) is used to install the vehicle's battery.

2. The vehicle chassis according to claim 1, characterized in that, The floor (100) includes: A first sill beam (101) and a second sill beam (102) are spaced apart along the width direction of the vehicle; The base plate (103) is connected between the first threshold beam (101) and the second threshold beam (102); The connecting beam (200) is connected between the first threshold beam (101) and the second threshold beam (102). The connecting beam (200) is detachably connected to both the first threshold beam (101) and the second threshold beam (102). The connecting beam (200) is located above the base plate (103) and is detachably connected to the base plate (103).

3. The vehicle chassis according to claim 2, characterized in that, The connecting beam (200) is a roll-formed component.

4. The vehicle chassis according to claim 2, characterized in that, The connecting beam (200) is a hollow structure.

5. The vehicle chassis according to claim 4, characterized in that, The cross section of the connecting beam (200) is a closed section.

6. The vehicle chassis according to claim 2, characterized in that, The base plate (103) is connected to the surface of the first threshold beam (101) facing the second threshold beam (102), and the base plate (103) is connected to the surface of the second threshold beam (102) facing the first threshold beam (101).

7. The vehicle chassis according to any one of claims 2-6, characterized in that, The connecting beam (200) includes a first part (201), a second part (202) and a third part (203) connected in sequence. The first part (201) is connected to the first threshold beam (101), the second part (202) is connected to the second threshold beam (102), and the third part (203) is connected to the base plate (103). Along the height direction of the vehicle, the third portion (203) is higher than the bottom surface of the first sill beam (101) and lower than the top surface of the first sill beam (101); and / or, along the height direction of the vehicle, the third portion (203) is higher than the bottom surface of the second sill beam (102) and lower than the top surface of the second sill beam (102).

8. The vehicle chassis according to claim 7, characterized in that, The first part (201) is connected to the top surface of the first threshold beam (101), and the second part (202) is connected to the top surface of the second threshold beam (102).

9. The vehicle chassis according to any one of claims 2-6, characterized in that, The connecting beam (200) is provided with a plurality of mounting holes (204), which are arranged in the direction from the first threshold beam (101) to the second threshold beam (102).

10. A vehicle, characterized in that, include: Battery pack (300); The vehicle chassis according to any one of claims 1-9, wherein the battery pack (300) is detachably connected to the connecting beam (200), and the battery panel and the base plate (103) are disposed on opposite sides of the connecting beam (200) along the vehicle direction.

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