Chassis and vehicle

Abstract

A chassis and a vehicle. The chassis (40) comprises: a chassis body (41), the chassis body defining an energy compartment (4125) for accommodating a battery, and the energy compartment being longitudinally located behind a front floor cross beam (4121) of the chassis body; and an elastic energy storage structure (42), the elastic energy storage structure being mounted on the chassis body and being located in front of the front floor cross beam, and the elastic energy storage structure being configured to be deformable in the longitudinal direction.

Description

Chassis and vehicle TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a chassis and a vehicle. BACKGROUND

[0002] In the related art, the battery is installed on the chassis of the vehicle. When the vehicle collides, the chassis is prone to deformation and extrusion of the battery, which may cause deformation and damage of the battery, thereby reducing the use reliability of the battery and the reliability of the vehicle.

[0003] SUMMARY

[0004] The present application provides a chassis and a vehicle to help reduce the impact force and pressure on the battery, reduce the risk of battery rupture, leakage, or even fire and explosion, effectively slow down the displacement and deformation of the battery, protect the integrity and safety of the battery, maintain the integrity of the vehicle body structure, reduce the deformation and damage of the vehicle, and improve the reliability of the vehicle.

[0005] In a first aspect, an embodiment of the present application provides a chassis applied to a vehicle, comprising:

[0006] a chassis body, the chassis body defining an energy cabin for accommodating a battery, the energy cabin being located rearward of a front floor cross beam of the chassis body in a longitudinal direction;

[0007] a resilient energy storage structure, the resilient energy storage structure being installed on the chassis body and located forward of the front floor cross beam, the resilient energy storage structure being configured to be capable of deforming in the longitudinal direction.

[0008] In the above technical solution, by arranging the resilient energy storage structure forward of the front floor cross beam and the energy cabin, the resilient energy storage structure can quickly absorb and disperse the energy generated by the collision at the moment of collision, which helps to reduce the impact force and pressure on the battery, reduces the risk of battery rupture, leakage, or even fire and explosion, effectively slows down the displacement and deformation of the battery, protects the integrity and safety of the battery, maintains the integrity of the vehicle body structure, reduces the deformation and damage of the vehicle, and improves the reliability of the vehicle.

[0009] In some embodiments, the chassis body includes a front cabin structure and a front floor structure distributed and connected in the longitudinal direction, the front floor structure includes the front floor cross beam and forms the energy cabin, and an upper surface of the resilient energy storage structure is not higher than an upper surface of the front cabin structure.

[0010] In some embodiments, the front cabin structure includes a front anti-collision beam and front longitudinal beams connected to both ends of the front anti-collision beam, and the resilient energy storage structure is located rearward of the front anti-collision beam in the longitudinal direction.

[0011] In some embodiments, the elastic energy storage structure is connected to at least one of the front floor cross beam and the front longitudinal beam.

[0012] In some embodiments, the front longitudinal beam comprises a front longitudinal beam body and a twist beam longitudinally distributed and connected, a rear end of the twist beam is connected to a front end of the front floor structure, and the elastic energy storage structure is connected to the twist beam.

[0013] In some embodiments, the chassis body comprises a front cabin structure and a front floor structure longitudinally distributed and connected, the front floor structure comprises the front floor cross beam and forms the energy cabin, the front cabin structure comprises a front bumper beam and front longitudinal beams connected to both ends of the front bumper beam, and a front end of the front bumper beam is connected to a rear end of the elastic energy storage structure.

[0014] In some embodiments, the elastic energy storage structure comprises a coil spring.

[0015] In some embodiments, the elastic energy storage structure further comprises:

[0016] a pressing plate and a supporting plate longitudinally distributed and separated, both the pressing plate and the supporting plate are connected to the coil spring, the pressing plate is longitudinally located in front of the supporting plate, and the supporting plate is connected to the chassis body.

[0017] In some embodiments, the chassis body comprises a front cabin structure and a front floor structure longitudinally distributed and connected, the front floor structure comprises the front floor cross beam and forms the energy cabin, the front cabin structure defines an open area longitudinally located in front of the energy cabin, and a maximum width of the coil spring in the transverse direction is less than a minimum width of the open area in the transverse direction.

[0018] In some embodiments, the elastic energy storage structure comprises a steel plate spring.

[0019] In some embodiments, a plurality of elastic energy storage structures are provided, each of the elastic energy storage structures is installed at different positions of the chassis body.

[0020] In some embodiments, the chassis further comprises:

[0021] an energy absorption structure, the energy absorption structure is installed at a front end of the front floor cross beam.

[0022] In some embodiments, the elastic energy storage structure is connected to the front end of the energy absorption structure.

[0023] In the technical solution, the elastic energy storage structure and the energy absorption structure are longitudinally distributed and connected, when the front ends of the elastic energy storage structure and the energy absorption structure are connected, the elastic energy storage structure and the energy absorption structure form a continuous and cooperative system, when a collision occurs, the system can effectively utilize the respective advantages to jointly cope with the impact caused by the collision, and through the interaction between the energy storage structure and the energy absorption structure, the collision energy can be more effectively absorbed and dispersed, the deformation degree of the chassis during the collision is reduced, the stress on the battery is reduced, the risk of the chassis body deforming and extruding the battery is reduced, and the stability and drivability of the vehicle are maintained.

[0024] In some embodiments, at least part of the energy absorption structure is connected to the middle part of the elastic energy storage structure in the transverse direction.

[0025] In some embodiments, a plurality of energy absorption structures are provided, and the plurality of energy absorption structures are distributed in the transverse direction with a spacing.

[0026] In some embodiments, the width of the energy absorption structure gradually increases from front to back in the transverse direction.

[0027] In some embodiments, the energy absorption structure has a plurality of cavities, a partition rib is arranged between two adjacent cavities, and the cavities extend through the energy absorption structure in the longitudinal direction.

[0028] In some embodiments, the chassis body includes a front cabin structure and a front floor structure which are longitudinally distributed and connected, the front floor structure includes the front floor cross beam and forms the energy cabin, the front floor structure further includes a front floor inner longitudinal beam and left and right rocker beams which are arranged with a spacing in the transverse direction, the front floor cross beam is connected between the left and right rocker beams, and the front end of the front floor inner longitudinal beam is connected to the front floor cross beam.

[0029] In some embodiments, a plurality of front floor inner longitudinal beams are arranged, and the plurality of front floor inner longitudinal beams are distributed with a spacing in the transverse direction between the left and right rocker beams.

[0030] In a second aspect, the embodiments of the present application provide a vehicle, including:

[0031] The chassis as in any one of the preceding. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0033] Fig. 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application;

[0034] Fig. 2 is a bottom view of a partial structure of a chassis according to some embodiments of the present application;

[0035] Fig. 3 is a bottom view of a partial structure of a chassis according to some embodiments of the present application;

[0036] Fig. 4 is a bottom view of a partial structure of a chassis according to some embodiments of the present application;

[0037] Fig. 5 is a bottom view of a partial structure of a chassis according to some embodiments of the present application;

[0038] Fig. 6 is a bottom view of a partial structure of a chassis according to some embodiments of the present application;

[0039] Fig. 7 is a bottom view of a partial structure of a chassis according to some embodiments of the present application;

[0040] Fig. 8 is a bottom view of a partial structure of a chassis according to some embodiments of the present application;

[0041] Fig. 9 is a structural schematic diagram of a resilient energy storage structure according to some embodiments of the present application;

[0042] Fig. 10 is a structural schematic diagram of a resilient energy storage structure according to some embodiments of the present application;

[0043] Fig. 11 is a structural schematic diagram of a resilient energy storage structure according to some embodiments of the present application;

[0044] Fig. 12 is a structural schematic diagram of a resilient energy storage structure according to some embodiments of the present application;

[0045] Fig. 13 is an assembly schematic diagram of a resilient energy storage structure, an energy absorption structure and a front floor cross beam according to some embodiments of the present application;

[0046] Fig. 14 is an assembly schematic diagram of a resilient energy storage structure, an energy absorption structure and a front floor cross beam according to some embodiments of the present application;

[0047] Fig. 15 is an assembly schematic diagram of a resilient energy storage structure, an energy absorption structure and a front floor cross beam according to some embodiments of the present application;

[0048] Fig. 16 is a structural schematic diagram of an energy absorption structure according to some embodiments of the present application;

[0049] Fig. 17 is a structural schematic diagram of an energy absorption structure according to some embodiments of the present application;

[0050] Fig. 18 is a structural schematic diagram of an energy absorption structure according to some embodiments of the present application;

[0051] Fig. 19 is a structural schematic diagram of the energy absorption structure according to some embodiments of the present application;

[0052] Fig. 20 is a structural schematic diagram of the energy absorption structure according to some embodiments of the present application.

[0053] Reference signs:

[0054] Vehicle 1;

[0055] Battery 10, motor 20, controller 30;

[0056] Chassis 40;

[0057] Chassis body 41, front compartment structure 411, front anti-collision beam 4111, front longitudinal beam body 4112, torsion beam 4113, opening area 4114, front floor structure 412, front floor cross beam 4121, front floor inner longitudinal beam 4122, left door sill beam 4123, right door sill beam 4124, energy compartment 4125;

[0058] Elastic energy storage structure 42, coil spring 421, pressing plate 422, support plate 423, steel plate spring 424;

[0059] Energy absorption structure 43, cavity 431, partition rib 432. DETAILED DESCRIPTION

[0060] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0061] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, and are not intended to describe a particular order or primary and secondary relationship.

[0062] Reference within this application to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As used in this application, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or". That is, unless specified otherwise, or clear from context, "X employs A or B" means that X employs A or B or both. The term "a" or "an" is defined as one or more unless explicitly indicated to the contrary or otherwise evident from the context. The term "plurality" is defined as two or more unless explicitly indicated to the contrary or otherwise evident from the context.

[0063] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "attachment" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be directly connected, or indirectly connected through intermediate medium, it can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0064] The term "and / or" in this application is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this application generally represents that the front and rear associated objects have an "or" relationship.

[0065] "Multiple" appearing in this application refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0066] In this application, the battery can be a battery pack, the battery can also be a plurality of battery modules, and the battery can also be a plurality of battery monomers.

[0067] In this application, the battery monomer can include a lithium ion secondary battery, a lithium ion primary battery, a lithium-sulfur battery, a sodium lithium ion battery, a sodium ion battery, or a magnesium ion battery, etc. The embodiments of the present application are not limited thereto. The battery monomer can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc. The embodiments of the present application are also not limited thereto. The battery monomer is generally divided into three types according to the packaging method: cylindrical battery monomers, square battery monomers, and soft package battery monomers, and the embodiments of the present application are also not limited thereto.

[0068] The battery module mentioned in the embodiments of the present application refers to a single physical module including one or more battery monomers to provide higher voltage and capacity.

[0069] The battery pack mentioned in the embodiments of the present application refers to a single physical module including a plurality of battery monomers or a plurality of battery modules to provide higher voltage and capacity. The battery pack generally includes a box for packaging a plurality of battery monomers or a plurality of battery modules. The box can avoid the influence of liquid or other foreign matters on the charging or discharging of the battery monomers.

[0070] The battery monomer includes a shell, an electrode assembly, and an electrolyte, and the shell is used to accommodate the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode tab, a negative electrode tab, and a separator film. The battery monomer mainly relies on the movement of metal ions between the positive electrode tab and the negative electrode tab to work. The positive electrode tab includes a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protrudes from the positive electrode current collector with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer serves as a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode tab includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode current collector, the negative electrode current collector without the negative electrode active material layer protrudes from the negative electrode current collector with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that no fuse occurs when passing a large current, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0071] The material of the separator film can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be a winding type structure or a laminated type structure, and the embodiments of the present application are not limited thereto.

[0072] In recent years, new energy vehicles have made a leap in development. In the field of electric vehicles, batteries, as the power source of electric vehicles, play an irreplaceable important role. As a core component of new energy vehicles, batteries have high requirements in terms of reliability.

[0073] The battery is installed on the chassis of the vehicle. When the vehicle collides, the chassis is easy to deform and press the battery, which can cause the battery to deform and damage, etc., reducing the reliability of the battery use, thereby reducing the reliability of the vehicle.

[0074] Based on the above considerations, in order to solve the problem of battery deformation and damage caused by vehicle collision, after in-depth research, a chassis is designed, which is applied to a vehicle, the chassis comprises: a chassis body and an elastic energy storage structure, the chassis body defines an energy cabin for accommodating the battery, and the energy cabin is located behind the front floor cross beam of the chassis body in the longitudinal direction; the elastic energy storage structure is installed on the chassis body and located in front of the front floor cross beam, and the elastic energy storage structure is configured to be able to deform in the longitudinal direction.

[0075] In the chassis with such a structure, by arranging the elastic energy storage structure in front of the front floor cross beam and the energy cabin, the elastic energy storage structure with such a structure can effectively absorb and convert the energy generated during the collision, effectively manage and control the impact energy, reduce the damage of the vehicle body, reduce the stress on the battery, reduce the risk of battery deformation and damage, thereby improving the use reliability of the battery, and further improving the reliability of the vehicle.

[0076] As shown in FIG. 1, it is a structural schematic diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid automobile or a range extended automobile, etc. The vehicle 1 can be provided with a motor 20, a controller 30 and a battery 10 inside, and the controller 30 is used to control the power supply of the battery 10 to the motor 20. For example, the battery 10 can be arranged at the bottom, the front or the rear of the vehicle 1. The battery 10 can be used for power supply of the vehicle 1, for example, the battery 10 can be used as an operating power source of the vehicle 1, which is used for the circuit system of the vehicle 1, for example, for the power demand of starting, navigation and operation of the vehicle 1. In another embodiment of the present application, the battery 10 can not only be used as an operating power source of the vehicle 1, but also be used as a driving power source of the vehicle 1, which replaces or partially replaces fuel or natural gas to provide driving power for the vehicle 1.

[0077] As shown in FIG. 2, the longitudinal direction is the length direction of the vehicle, i.e. the front-rear direction in the figure; the transverse direction in the present application is the width direction of the vehicle, i.e. the left-right direction in the figure; the vertical direction in the present application is the height direction of the vehicle, i.e. the up-down direction (not shown in FIG. 2), which is perpendicular to the longitudinal direction and the transverse direction.

[0078] The present application provides a chassis 40 applied to a vehicle 1.

[0079] The chassis 40 according to the embodiments of the present application will be described below with reference to FIGS. 2-20.

[0080] According to some embodiments of the present application, as shown in FIGS. 2 and 5, the chassis 40 comprises: a chassis body 41 and an elastic energy storage structure 42.

[0081] The chassis body 41 defines an energy cabin 4125 for accommodating the battery 10, the energy cabin 4125 is longitudinally located behind a front floor cross beam 4121 of the chassis body 41; the elastic energy storage structure 42 is mounted to the chassis body 41, and the elastic energy storage structure 42 is located in front of the front floor cross beam 4121, and the elastic energy storage structure 42 is configured to be capable of deforming in the longitudinal direction.

[0082] The elastic energy storage structure 42 can include but is not limited to a steel plate spring 424, a coil spring 421, an air spring, etc., which is not limited here.

[0083] For example, in some embodiments, as shown in FIGS. 2-4, the elastic energy storage structure 42 is a steel plate spring 424.

[0084] For example, in some other embodiments, as shown in FIGS. 5-8, the elastic energy storage structure 42 is a coil spring 421.

[0085] For example, in some embodiments, the battery 10 can be a battery monomer, a battery module or a battery pack.

[0086] In this embodiment, the chassis 40 is designed using CTC (Cell To Chassis) technology, specifically, the battery monomer is directly integrated into the chassis 40 using the energy cabin 4125, which not only improves the safety of the battery 10, but also enhances the overall structural stability of the vehicle 1. This design makes the energy cabin 4125 of the battery 10 the core of the chassis 40 architecture, which can reduce the dependence on other components, thereby reducing the overall vehicle cost, and the application of the energy cabin 4125 can also optimize the battery 10 layout space, reduce the number of parts, and improve production efficiency.

[0087] In some embodiments, at least part of the elastic energy storage structure 42 is located in the middle region of the chassis 40 in the transverse direction; wherein the middle region refers to the region covered by a certain distance on both sides of the transverse center line of the chassis 40, for example, the middle region is set to the region covered by 0.5m on both sides of the transverse center line of the chassis 40.

[0088] It can be understood that the application of the elastic energy storage structure in the chassis mainly utilizes the elastic deformation characteristics of the spring to store and release energy. The elastic energy storage structure usually includes one or more springs, which will deform when subjected to external force, thereby converting energy into potential energy. Subsequently, various work tasks can be achieved by releasing the energy of the spring, such as the common application of the elastic energy storage structure in the suspension system of the vehicle. Specifically, the elastic energy storage structure can be used to buffer ground impact, reduce body vibration, and make the vehicle more stable during driving.

[0089] The elastic energy storage structure 42 integrated in the chassis 40 in the present application is intended to optimize the crash safety performance of the vehicle 1, and this function can be achieved in the following way:

[0090] In actual implementation, as shown in FIGS. 2-8, when the vehicle 1 is in a high-speed crash working condition, a frontally invading barrier directly hits the chassis 40. During the collapsing process of the chassis 40, when the collision energy is transmitted to the elastic energy storage structure 42, the elastic energy storage structure 42 is forced to compress and deform backward. At this time, the elastic force of the elastic elements in the elastic energy storage structure 42 continuously increases, so that the elastic energy storage structure 42 can store the collision energy, until the elastic energy storage structure 42 no longer continues to deform backward. During the energy storage process, the collision force cannot directly act on the rear front floor cross beam 4121 and the battery 10 installed in the energy compartment 4125, so that the impact energy transmitted to the energy compartment 4125 is very small. Then the elastic energy storage structure 42 rebounds forward. At this time, the elastic force of the elastic elements in the elastic energy storage structure 42 continuously decreases, so that the elastic energy storage structure 42 can release the collision energy stored before, until the elastic energy storage structure 42 no longer continues to rebound forward. During the energy release process, the elastic force behaves as a forward pulling force, further reducing the impact force and pressure on the battery 10.

[0091] The chassis 40 provided by the embodiments of the present application can quickly absorb and disperse the energy generated by the collision at the moment of the collision by arranging the elastic energy storage structure 42 in front of the front floor cross beam 4121 and the energy compartment 4125 as described above, which helps to reduce the impact force and pressure on the battery 10, reduces the risk of the battery 10 breaking, leaking, or even catching fire and exploding, effectively slows down the displacement and deformation of the battery 10, protects the integrity and safety of the battery 10, maintains the integrity of the vehicle body structure, reduces the deformation and damage of the vehicle 1, and thus improves the reliability of the vehicle 1.

[0092] According to some embodiments of the present application, as shown in FIGS. 2-5 and 7, the chassis body 41 can include a front compartment structure 411 and a front floor structure 412 distributed and connected in the longitudinal direction. The front floor structure 412 can include a front floor cross beam 4121, and the front floor structure 412 can form an energy compartment 4125. The upper surface of the elastic energy storage structure 42 can be not higher than the upper surface of the front compartment structure 411.

[0093] It can be understood that the area where the front compartment structure 411 is located usually needs to arrange some other electrical devices, such as motors and thermal management components, etc. These electrical devices need to occupy most of the space in this area, so the elastic energy storage structure 42 needs to consider the interference problem with these electrical devices when designing the position.

[0094] In this embodiment, the projection of the front cabin structure 411 is above the projection of the elastic energy storage structure 42, and the projection of the front cabin structure 411 can be completely non-coincident with the projection of the elastic energy storage structure 42, or the projection of the front cabin structure 411 can be at least partially coincident with the projection of the elastic energy storage structure 42, in which the vertical plane is the projection plane and the transverse direction is the projection direction.

[0095] It should be noted that the positions and distances between the elastic energy storage structure 42 and other components should be fully considered in the design and arrangement, and sufficient space intervals should be ensured between the components. In addition, the accuracy and quality of each component should be strictly controlled during the manufacturing process of the vehicle 1, so that each component can normally work according to the design requirements.

[0096] The chassis 40 provided by the embodiments of the present application reduces the interference between the elastic energy storage structure 42 and other electrical devices, prevents the elastic energy storage structure 42 from being pressed to other components to affect the normal work of the components during the energy storage or release stage, saves the maintenance cost, and improves the safety performance of the whole vehicle.

[0097] According to some embodiments of the present application, as shown in FIGS. 2-5 and 7, the front cabin structure 411 includes a front anti-collision beam 4111 and front longitudinal beams connected to both ends of the front anti-collision beam 4111, and the elastic energy storage structure 42 is located behind the front anti-collision beam 4111 in the longitudinal direction.

[0098] In this embodiment, the projection of the elastic energy storage structure 42 is behind the projection of the front anti-collision beam 4111, and the projection of the elastic energy storage structure 42 is non-coincident with the projection of the front anti-collision beam 4111, and based on the above-mentioned structure that the upper surface of the elastic energy storage structure 42 is not higher than the upper surface of the front cabin structure 411, the elastic energy storage structure 42 can be located below and behind the front anti-collision beam 4111 as a whole.

[0099] The chassis 40 provided by the embodiments of the present application makes the front cabin structure 411 capable of pressing the elastic energy storage structure 42 after sufficient collapse, so as to transmit the collision energy to the elastic energy storage structure 42 as much as possible, and facilitate the elastic energy storage structure 42 to fully store the collision energy.

[0100] According to some embodiments of the present application, as shown in FIGS. 2-6, the elastic energy storage structure 42 can be connected with at least one of the front floor cross beam 4121 and the front longitudinal beam.

[0101] The assembly scheme of the elastic energy storage structure 42 can be any one of the following:

[0102] One, as shown in FIG. 2 and FIG. 5, the elastic energy storage structure 42 is connected with the front floor cross beam 4121;

[0103] Two, as shown in FIG. 3-FIG. 4 and FIG. 6, the elastic energy storage structure 42 is connected with the front longitudinal beam;

[0104] Three, the elastic energy storage structure 42 is connected with the front floor cross beam 4121, and the elastic energy storage structure 42 is connected with the front longitudinal beam;

[0105] It should be noted that, on the basis of the elastic energy storage structure 42 being connected with at least one of the front floor cross beam 4121 and the front longitudinal beam, the elastic energy storage structure 42 can also extend longitudinally to the front end and the rear end of the front bumper beam 4111.

[0106] The chassis 40 provided by the embodiment of the present application can select a suitable assembly scheme according to actual needs and arrangement space restrictions, increase the diversity and flexibility of the elastic energy storage structure 42 in actual application, and at the same time realize the fixed connection of the elastic energy storage structure 42 with at least one of the front floor cross beam 4121 and the front longitudinal beam, thereby improving the stability and reliability of the installation of the elastic energy storage structure 42.

[0107] According to some embodiments of the present application, as shown in FIG. 3-FIG. 4 and FIG. 6, the front longitudinal beam can include a front longitudinal beam body 4112 and a torsion beam 4113 which are distributed and connected longitudinally, the rear end of the torsion beam 4113 can be connected with the front end of the front floor structure 412, and the elastic energy storage structure 42 can be connected to the torsion beam 4113.

[0108] The front longitudinal beam body 4112 is connected between the end of the front bumper beam 4111 and the front end of the torsion beam 4113, and the elastic energy storage structure 42 can be connected between the left and right torsion beams 4113.

[0109] The connection mode between the front longitudinal beam body 4112 and the front bumper beam 4111 can include but is not limited to bolt connection, riveting or welding, etc., which is not limited here.

[0110] For example, in some embodiments, the connection mode between the front longitudinal beam body 4112 and the front bumper beam 4111 is bolt connection.

[0111] The connection mode between the front longitudinal beam body 4112 and the torsion beam 4113 can include but is not limited to bolt connection, riveting or welding, etc., which is not limited here.

[0112] For example, in some embodiments, the connection mode between the front longitudinal beam body 4112 and the torsion beam 4113 is riveting.

[0113] The connection between the elastic energy storage structure 42 and the torsion beam 4113 can include, but is not limited to, bolting, riveting, or welding, etc., which is not limited here.

[0114] For example, in some embodiments, the connection between the elastic energy storage structure 42 and the torsion beam 4113 is bolting.

[0115] It can be understood that the torsion beam 4113 is located in the front structure of the vehicle 1, and when the vehicle 1 collides, the torsion beam 4113 can absorb and disperse the collision energy, especially when a small offset collision occurs, the torsion beam 4113 can effectively transmit part of the collision energy of the lower part of the vehicle body to the A-pillar, toe plate, and ski plate, etc., and then to the rear of the vehicle body.

[0116] In this embodiment, when the elastic energy storage structure 42 is connected to the front longitudinal beam, the left end and the right end of the elastic energy storage structure 42 can be connected to the left and right torsion beams 4113 respectively, and the elastic energy storage structure 42 can be connected to the front of the torsion beam 4113, thereby forming a good supporting effect on the elastic energy storage structure 42. When a collision occurs, the torsion beam 4113 and the elastic energy storage structure 42 jointly bear the impact, reduce the deformation and damage of the vehicle body and the energy compartment 4125, thereby reducing the impact force and pressure on the battery 10, and reducing the risk of the battery 10 cracking, leaking, or even catching fire and explosion.

[0117] In other embodiments, when the elastic energy storage structure 42 is connected to the front longitudinal beam, the elastic energy storage structure 42 is connected to the front longitudinal beam body 4112.

[0118] The chassis 40 provided by the embodiments of the present application is connected to the torsion beam 4113 through the elastic energy storage structure 42 described above. The elastic energy storage structure 42 can better play a role in a collision, as part of energy absorption, and together with the torsion beam 4113 to improve the collision safety of the vehicle 1, reduce the risk of deformation and damage of the battery 10, and improve the use reliability of the battery 10. At the same time, the torsion beam 4113 itself is a solid frame integrally casted for supporting and connecting the front components of the vehicle 1. Installing the elastic energy storage structure 42 on the torsion beam 4113 can further enhance the strength of the structure, help to improve the overall durability and impact resistance of the vehicle 1, make the vehicle 1 more stable and safe during driving, and the integrated design of the elastic energy storage structure 42 and the torsion beam 4113 can simplify the installation and maintenance process, reduce the number and weight of parts, reduce manufacturing costs, and improve production efficiency.

[0119] According to some embodiments of the present application, as shown in FIGS. 7-8, the chassis body 41 can include a front cabin structure 411 and a front floor structure 412 longitudinally distributed and connected, the front floor structure 412 can include a front floor beam 4121, and the front floor structure 412 can form an energy cabin 4125, the front cabin structure 411 can include a front bumper beam 4111 and front longitudinal beams connected to both ends of the front bumper beam 4111, and the rear end of the elastic energy storage structure 42 can be connected to the front end of the front bumper beam 4111.

[0120] In this embodiment, as shown in FIGS. 7-8, the rear end of the elastic energy storage structure 42 can be connected to the front end of the front bumper beam 4111 by bolting or riveting, etc., and the length of the elastic energy storage structure 42 does not exceed the length of the front bumper beam 4111, in other words, the elastic energy storage structure 42 does not extend beyond the front bumper beam 4111 in the transverse direction, when the vehicle 1 collides, the elastic energy storage structure 42 is impacted before the front bumper beam 4111 and the front longitudinal beam, and quickly absorbs and disperses the energy, thereby reducing the impact on the overall structure of the vehicle 1.

[0121] The chassis 40 provided by the embodiments of the present application, through the above-mentioned setting of the rear end of the elastic energy storage structure 42 connected to the front end of the front bumper beam 4111, when the vehicle 1 collides, the front bumper beam 4111 as the primary impact bearing component, the elastic energy storage structure 42 at its front end can quickly absorb and disperse the energy generated by the collision, effectively reducing the impact and damage to the body structure, and in a slight collision, the energy storage structure can completely absorb the collision energy, thereby reducing the repair cost.

[0122] According to some embodiments of the present application, as shown in FIGS. 2-4, the elastic energy storage structure 42 can include a coil spring 421.

[0123] The coil spring 421 can store and release collision energy through elastic deformation of its own material.

[0124] The coil spring 421 can be provided with one or more, where more means two or more.

[0125] For example, in some embodiments, as shown in FIGS. 2-4, three coil springs 421 are provided.

[0126] For example, in some other embodiments, as shown in FIGS. 10-11, four coil springs 421 are provided.

[0127] For example, in some other embodiments, as shown in FIG. 12, six coil springs 421 are provided.

[0128] According to the application requirements, the coil spring 421 can be designed in different shapes, sizes and stiffness to meet different working conditions and performance requirements.

[0129] Exemplarily, the helical spring 421 is wound by a circular cross-section material (such as a steel wire) and has a helical structure.

[0130] The chassis 40 provided by the embodiments of the present application can absorb and disperse the energy generated by the collision when the vehicle 1 collides, by the design of the helical spring 421 as the main elastic element of the elastic energy storage structure 42. Such energy absorption characteristics help to reduce the impact of the collision on the vehicle body structure, reduce the impact on the energy compartment 4125 and the passenger compartment, improve the collision safety, and the helical spring 421 has the characteristics of simple structure and low manufacturing cost, which can simplify the design and manufacturing process of the vehicle 1 and reduce the production cost. In addition, the helical spring 421 is a common mechanical part and is easy to repair and replace. If the helical spring 421 is damaged or performance decreases during the use of the vehicle 1, it can be easily replaced or repaired to maintain the normal operation of the vehicle 1.

[0131] According to some embodiments of the present application, as shown in FIGS. 2-4, the elastic energy storage structure 42 further comprises a pressing plate 422 and a supporting plate 423 arranged longitudinally.

[0132] The pressing plate 422 and the supporting plate 423 are connected with the helical spring 421, and the pressing plate 422 is located in front of the supporting plate 423 in the longitudinal direction. The supporting plate 423 is connected with the chassis body 41, and the pressing plate 422 can be selectively connected with the chassis body 41.

[0133] As shown in FIGS. 2-4, it can be understood that it is difficult to directly fix the independent helical spring 421 with other components, and it affects the performance of the energy storage function. Therefore, the elastic energy storage structure 42 can further comprise a pressing plate 422 and a supporting plate 423 arranged longitudinally, and the helical spring 421 is provided in plurality, and at least part of the plurality of helical springs 421 is installed between the pressing plate 422 and the supporting plate 423.

[0134] Among them, the structure of the pressing plate 422, the supporting plate 423 and the plurality of helical springs 421 can be at least one of the following:

[0135] First, as shown in FIG. 9, the plurality of helical springs 421 are all installed between the pressing plate 422 and the supporting plate 423, and the plurality of helical springs 421 form a row in the transverse direction;

[0136] Second, as shown in FIG. 10, the plurality of helical springs 421 are all installed between the pressing plate 422 and the supporting plate 423, and the plurality of helical springs 421 form an array of multiple rows and multiple columns in the transverse direction and the longitudinal direction;

[0137] Thirdly, as shown in FIG. 11, a part of the plurality of coil springs 421 is mounted between the pressing plate 422 and the support plate 423, and the other part of the coil springs 421 is connected to the side of the pressing plate 422 away from the support plate 423 in a cantilevered manner.

[0138] Fourthly, as shown in FIG. 12, a plurality of pressing plates 422 are provided, a part of the plurality of coil springs 421 is mounted between the support plate 423 and the pressing plate 422 closest to the support plate 423, and the other part of the coil springs 421 is connected between two adjacent pressing plates 422.

[0139] In the case where the elastic energy storage structure 42 comprises the coil springs 421, the coil springs 421 can be connected to at least one of the front floor cross beam 4121 and the front longitudinal beam. Specifically, when the coil springs 421 are connected to the front floor cross beam 4121, the pressing plate 422 can be provided in a suspended manner, and the support plate 423 can be connected to the front end and the lower end of the front floor cross beam 4121; when the coil springs 421 are connected to the front longitudinal beam, the pressing plate 422 can be provided in a suspended manner, and the support plate 423 can be extended in the transverse direction to be connected to the lower end of the front longitudinal beam on the left and right sides; when the coil springs 421 are connected to both the front floor cross beam 4121 and the front longitudinal beam, the pressing plate 422 can be extended in the transverse direction to be connected to the lower end of the front longitudinal beam on the left and right sides, and the support plate 423 can be connected to the front end and the lower end of the front floor cross beam 4121.

[0140] The chassis 40 provided by the embodiments of the present application, through the provision of the pressing plate 422 and the support plate 423, the support plate 423 is connected to the chassis body 41, thereby providing a stable mounting basis for the coil springs 421, and the pressing plate 422 can be selectively connected to the chassis body 41, thereby increasing the flexibility of the structure, and also improving the stability of the overall structure of the chassis 40 to some extent. In addition, a plurality of construction and layout schemes of the pressing plate 422, the support plate 423 and the coil springs 421 are provided, and in actual design, a suitable construction and layout scheme can be selected according to application requirements, thereby increasing the diversity and flexibility of the elastic energy storage structure 42 in the selection design.

[0141] According to some embodiments of the present application, as shown in FIG. 2, the chassis body 41 can comprise a front cabin structure 411 and a front floor structure 412 distributed and connected in the longitudinal direction, the front floor structure 412 can comprise a front floor cross beam 4121, and the front floor structure 412 can form an energy cabin 4125, the front cabin structure 411 can define an opening region 4114, the opening region 4114 can be located in front of the energy cabin 4125 in the longitudinal direction, and the maximum width W1max of the coil springs 421 in the transverse direction can be less than the minimum width W2min of the opening region 4114 in the transverse direction.

[0142] It can be understood that in the front compartment of the vehicle 1, some other electrical devices such as motors and heat management components need to be arranged in the opening area 4114 and outside the opening area 4114, which occupy most of the space in this area, so the elastic energy storage structure 42 needs to consider the interference problem with these electrical devices when designing the position.

[0143] In this embodiment, the projection of the elastic energy storage structure 42 along the width direction is located within the projection of the opening area 4114, that is, the elastic energy storage structure 42 does not protrude in the transverse direction beyond the opening area 4114, with the horizontal plane as the projection plane and the vertical direction as the projection direction.

[0144] The chassis 40 provided by the embodiments of the present application can prevent the elastic energy storage structure 42 from interfering with other structures of the vehicle 1 during the collision process through the design that the maximum width W1max of the above-mentioned coil spring 421 is less than the minimum width W2min of the opening area 4114, which can minimize additional damage and repair costs, and other important components such as the engine and the radiator can be arranged more flexibly inside the front compartment of the vehicle 1. Through the reasonable use of space, the overall performance of the vehicle 1 can be optimized. In addition, when the elastic energy storage structure 42 needs to be repaired or replaced, the smaller width means that it is easier to access and operate, thereby reducing repair costs and time and improving the usability of the vehicle 1.

[0145] According to some embodiments of the present application, as shown in FIGS. 5-8, the elastic energy storage structure 42 can include a steel plate spring 424.

[0146] It can be understood that based on the shape characteristics of the steel plate spring 424, the independent steel plate spring 424 can be directly fixedly connected with other components. Specifically, the cross-sectional shape of the steel plate spring 424 is approximately arc-shaped, that is, the curvature center of the steel plate spring 424 is located near one side of the front floor cross beam 4121, that is, the foot of the arch faces the front floor cross beam 4121.

[0147] As shown in FIGS. 5-8, in the case where the elastic energy storage structure 42 includes the steel plate spring 424, the steel plate spring 424 can be connected with at least one of the front floor cross beam 4121, the front longitudinal beam and the front bumper beam 4111. Specifically, when the steel plate spring 424 is connected with the front floor cross beam 4121, the two ends of the steel plate spring 424 can be connected with the front end of the front floor cross beam 4121; when the steel plate spring 424 is connected with the front longitudinal beam, the two ends of the steel plate spring 424 can be connected with the lower ends of the front longitudinal beams on the left and right sides; when the steel plate spring 424 is connected with the front bumper beam 4111, the two ends of the steel plate spring 424 can be connected with the front end of the front bumper beam 4111.

[0148] The chassis 40 provided by the embodiments of the present application can effectively absorb the energy generated by the collision when the vehicle 1 collides, and the elastic characteristics of the leaf spring 424 enable it to deform rapidly and store energy, thereby reducing the impact of the collision on the vehicle body structure and the energy compartment 4125. At the same time, the leaf spring 424 can withstand greater loads and impacts, and can better cope with complex road conditions. Whether on a bumpy road or at high speed, the leaf spring 424 can provide stable support for the vehicle body, maintaining the stability and maneuverability of the vehicle 1. In addition, the durability and fatigue resistance of the leaf spring 424 are good, and it can withstand long-term use and repeated load impacts, thereby prolonging the service life of the vehicle 1.

[0149] According to some embodiments of the present application, as shown in Figures 7-8, multiple elastic energy storage structures 42 are provided, and each elastic energy storage structure 42 is installed at a different position of the chassis body 41.

[0150] For example, in some embodiments, as shown in Figures 7-8, the elastic energy storage structure 42 includes a leaf spring 424, and two leaf springs 424 are provided, which are respectively installed on the front bumper beam 4111 and the front longitudinal beam.

[0151] For example, in some other embodiments, the elastic energy storage structure 42 includes a leaf spring 424, and three leaf springs 424 are provided, which are respectively installed on the front bumper beam 4111, the front longitudinal beam, and the front floor cross beam 4121.

[0152] For example, in some other embodiments, the elastic energy storage structure 42 includes a helical spring 421, and two helical springs 421 are provided, which are respectively installed on the front longitudinal beam and the front floor cross beam 4121.

[0153] For example, in some other embodiments, the elastic energy storage structure 42 includes a leaf spring 424 and a helical spring 421, and one leaf spring 424 and one helical spring 421 are provided, one leaf spring 424 is installed on the front bumper beam 4111, and one helical spring is installed on the front floor cross beam 4121.

[0154] The chassis 40 provided by the embodiments of the present application can effectively absorb the energy generated by the collision when the vehicle 1 collides, and the elastic characteristics of the leaf spring 424 enable it to deform rapidly and store energy, thereby reducing the impact of the collision on the vehicle body structure and the energy compartment 4125. At the same time, the leaf spring 424 can withstand greater loads and impacts, and can better cope with complex road conditions. Whether on a bumpy road or at high speed, the leaf spring 424 can provide stable support for the vehicle body, maintaining the stability and maneuverability of the vehicle 1. In addition, the durability and fatigue resistance of the leaf spring 424 are good, and it can withstand long-term use and repeated load impacts, thereby prolonging the service life of the vehicle 1.

[0155] According to some embodiments of the present application, as shown in FIG. 4 and FIG. 7-8, the chassis 40 can further include an energy absorption structure 43.

[0156] The energy absorption structure 43 can be mounted at the front end of the front floor cross beam 4121.

[0157] The energy absorption structure 43 can include, but is not limited to, an energy absorption box, a buffer frame, an airbag, etc., without limitation.

[0158] For example, in some embodiments, the energy absorption structure 43 is an energy absorption box.

[0159] The connection between the energy absorption structure 43 and the front end of the front floor cross beam 4121 can include, but is not limited to, bolt connection, riveting, or welding, etc., without limitation.

[0160] For example, in some embodiments, the connection between the energy absorption structure 43 and the front end of the front floor cross beam 4121 is bolt connection.

[0161] In actual implementation, when the front of the vehicle 1 is hit, after the energy absorption structure 43 is hit, the energy absorption structure 43 can absorb at least part of the collision force, and the collision force not absorbed by the energy absorption structure 43 can be transmitted to the chassis body 41, and the collision force can be transmitted along the chassis body 41 to other structural members of the vehicle 1, so as to disperse the collision force and reduce the risk of concentrated stress.

[0162] The chassis 40 provided by the embodiments of the present application can reduce the stress on the battery 10 and reduce the risk of deformation of the chassis body 41 extruding the battery 10, reduce the risk of deformation and damage of the battery 10, and improve the use reliability of the battery 10, thereby improving the reliability of the vehicle 1.

[0163] According to some embodiments of the present application, as shown in FIG. 4 and FIG. 7-8, the elastic energy storage structure 42 can be connected to the front end of the energy absorption structure 43.

[0164] The connection between the elastic energy storage structure 42 and the front end of the energy absorption structure 43 can include, but is not limited to, bolt connection, riveting, or welding, etc., without limitation.

[0165] For example, in some embodiments, the connection between the elastic energy storage structure 42 and the front end of the energy absorption structure 43 is welding.

[0166] In actual implementation, when the vehicle 1 is in a high-speed collision working condition, a front-impact barrier directly hits the chassis 40, and when the collision energy is transmitted to the elastic energy storage structure 42 in the process of collapsing of the front compartment structure 411, the elastic energy storage structure 42 absorbs part of the collision energy by compressing and deforming backward, the collision energy not absorbed by the elastic energy storage structure 42 continues to be transmitted backward to the energy absorption structure 43, the energy absorption structure 43 absorbs part of the collision energy by crushing and deforming, and the remaining collision energy continues to be transmitted backward to the front floor structure 412 and the battery 10 installed on the energy compartment 4125.

[0167] The chassis 40 provided by the embodiments of the present application, through the design that the elastic energy storage structure 42 and the energy absorption structure 43 are longitudinally distributed and connected, when the front ends of the elastic energy storage structure 42 and the energy absorption structure 43 are connected, the elastic energy storage structure 42 and the energy absorption structure 43 can form a continuous and cooperative system, when a collision occurs, the system can more effectively utilize respective advantages, jointly cope with the impact caused by the collision, and through the interaction of the energy storage structure and the energy absorption structure 43, the collision energy can be more effectively absorbed and dispersed, the deformation degree of the chassis 40 during the collision is reduced, thereby reducing the stress on the battery 10, reducing the risk of the chassis body 41 deforming and extruding the battery 10, and further maintaining the stability and drivability of the vehicle 1.

[0168] According to some embodiments of the present application, as shown in FIGS. 13 and 15, at least part of the energy absorption structure 43 can be connected to the middle part of the elastic energy storage structure 42 in the transverse direction.

[0169] In this embodiment, as shown in FIGS. 13 and 15, the energy absorption structure 43 is located between the elastic energy storage structure 42 and the front floor cross beam 4121, the center line of the energy absorption structure 43 and the center line of the elastic energy storage structure 42 both extend in the longitudinal direction, and the center line of the energy absorption structure 43 is collinear with the center line of the elastic energy storage structure 42.

[0170] The chassis 40 provided by the embodiments of the present application, through the structure design that at least part of the energy absorption structure 43 is connected to the middle part of the elastic energy storage structure 42, the impact energy can be more effectively transmitted from the impact point to other parts of the energy absorption structure 43, thereby achieving uniform dispersion of energy, which helps to reduce the concentration of impact on the local area of the energy absorption structure 43, thereby improving the stability of the crushing and deforming of the energy absorption structure 43, and further reducing the collision force transmitted to the battery 10 at the rear as much as possible.

[0171] According to some embodiments of the present application, as shown in FIG. 14, a plurality of energy absorption structures 43 can be provided, and the plurality of energy absorption structures 43 can be distributed in the transverse direction with intervals.

[0172] Wherein, multiple means two or more than two, such as, in some embodiments, as shown in Figure 14, three energy-absorbing structures 43 are provided, and the three energy-absorbing structures 43 are distributed along the transverse direction with equal spacing.

[0173] As shown in Figure 14, each of the plurality of energy-absorbing structures 43 extends along the longitudinal direction, the spacing between each adjacent two energy-absorbing structures 43 can be equal, and at least part of the plurality of energy-absorbing structures 43 is connected to the middle part of the elastic energy storage structure 42.

[0174] The chassis 40 provided by the embodiments of the present application can more evenly distribute and absorb the energy generated by the collision by the provision of the plurality of energy-absorbing structures 43. When the collision occurs, each energy-absorbing structure 43 can work in parallel to bear and disperse the impact energy, thereby more efficiently reducing the energy transmitted to the battery 10, optimizing the protection effect of the battery 10 during the collision, and at the same time, when the offset collision occurs, only part of the plurality of energy-absorbing structures 43 can be sacrificed, thereby reducing the maintenance cost.

[0175] According to some embodiments of the present application, as shown in Figure 15, the width of the energy-absorbing structure 43 along the transverse direction can gradually increase from front to back.

[0176] It can be understood that the design of gradually increasing width enables the energy-absorbing structure 43 to more effectively disperse and absorb energy when impacted. Since the width of the rear part is larger, more material can be provided to participate in the energy absorption process, thereby increasing the total energy absorption amount. As the width increases, the stress distribution becomes more uniform. When the impact occurs, the stress is no longer concentrated in a narrow area of the energy-absorbing structure 43, but is dispersed over a wider area. The energy-absorbing structure 43 with gradually increasing width can produce progressive deformation and energy absorption, thereby improving the impact response, enabling the impact energy to be absorbed over a longer period of time, and reducing the instantaneous impact and vibration on the rear floor structure 412 and the battery 10.

[0177] The chassis 40 provided by the embodiments of the present application improves the energy absorption efficiency by the structural design of gradually increasing width of the energy-absorbing structure 43 from front to back. The wider energy-absorbing structure 43 at the rear part can also provide a larger support area, which, in combination with the elastic energy storage structure 42, can prevent the elastic energy storage structure 42 from tilting or losing stability after being stressed, thereby improving the impact resistance of the overall structure. Since the width of the energy-absorbing structure 43 gradually increases, it can adapt to different impact conditions in terms of intensity, direction and angle. When subjected to different impacts, the energy-absorbing structure 43 can effectively absorb energy and reduce damage to the rear floor structure 412 and the battery 10.

[0178] According to some embodiments of the present application, as shown in FIGS. 16-20, the energy-absorbing structure 43 can have a plurality of cavities 431, and a partition 432 can be arranged between two adjacent cavities 431, and the cavities 431 extend longitudinally through the energy-absorbing structure 43.

[0179] The cavities 431 can be formed by punching or other processing methods, and the energy-absorbing structure 43 can be made of aluminum alloy or other high ductility materials.

[0180] The shape of the cavities 431 can include, but is not limited to, square, triangle, circle, diamond, or polygon, etc., which is not limited herein.

[0181] In this embodiment, as shown in FIGS. 16-17, the shape of the cavities 431 can be square, and the sizes of the plurality of cavities 431 can be the same, or at least two of the plurality of cavities 431 have different sizes, and the partition 432 can include a horizontal partition 432 and a vertical partition 432 intersecting the horizontal partition 432.

[0182] In other embodiments, as shown in FIG. 18, the shape of the plurality of cavities 431 can include diamond, triangle, quadrilateral, and pentagon, and the partition 432 can be arranged diagonally.

[0183] In yet other embodiments, as shown in FIG. 19, the shape of the plurality of cavities 431 can include hexagon and trapezoid, and the partition 432 can include a horizontal partition 432 and a diagonal partition 432 intersecting the horizontal partition 432.

[0184] In yet other embodiments, as shown in FIG. 20, the shape of the plurality of cavities 431 can be circle, and the sizes of the plurality of cavities 431 can be the same, or at least two of the plurality of cavities 431 have different sizes.

[0185] The chassis 40 provided by the embodiments of the present application can effectively absorb the collision energy by the arrangement of the cavities 431 and the partitions 432, and the energy-absorbing structure 43 can be deformed by folding according to the predetermined design to reduce the damage of the impact force to the front floor structure 412 and the battery 10 as much as possible, thereby improving the passive safety of the vehicle 1 and significantly reducing the repair cost caused by the impact to the vehicle.

[0186] According to some embodiments of the present application, as shown in FIG. 3, FIG. 6 and FIG. 8, the chassis body 41 can include a front cabin structure 411 and a front floor structure 412 distributed longitudinally and connected, the front floor structure 412 can include a front floor cross beam 4121, and the front floor structure 412 can form an energy cabin 4125, the front floor structure 412 can further include a front floor inner longitudinal beam 4122, and a left rocker beam 4123 and a right rocker beam 4124 spaced apart in the transverse direction, the front floor cross beam 4121 can be connected between the left rocker beam 4123 and the right rocker beam 4124, and the front end of the front floor inner longitudinal beam 4122 can be connected to the front floor cross beam 4121.

[0187] In actual implementation, during the collision of the vehicle 1, the chassis 40 can have the following four transmission paths: first, the elastic energy storage structure 42 can absorb part of the collision energy, and the remaining collision energy can be transmitted longitudinally to the front floor cross beam 4121, and finally transmitted transversely to the left rocker beam 4123 and the right rocker beam 4124 connected to the front floor cross beam 4121; second, the elastic energy storage structure 42 can absorb part of the collision energy, and then the energy absorption structure 43 can absorb part of the collision energy, and then the remaining collision energy can be transmitted longitudinally to the front floor cross beam 4121, and transmitted transversely to the left rocker beam 4123 and the right rocker beam 4124 connected to the front floor cross beam 4121; third, the elastic energy storage structure 42 can absorb part of the collision energy, and the remaining collision energy can be transmitted longitudinally to the front floor cross beam 4121, and then transmitted longitudinally to the front floor inner longitudinal beam 4122 connected to the front floor cross beam 4121; fourth, the elastic energy storage structure 42 can absorb part of the collision energy, and then the energy absorption structure 43 can absorb part of the collision energy, and then the remaining collision energy can be transmitted longitudinally to the front floor cross beam 4121, and then transmitted longitudinally to the front floor inner longitudinal beam 4122 connected to the front floor cross beam 4121.

[0188] The chassis 40 provided by the embodiments of the present application realizes the dispersion of the collision force to the rocker beams and the front floor inner longitudinal beam 4122 after the transverse transmission and longitudinal transmission, increases the diversity of the transmission path, and as much as possible alleviates the negative impact of the impact energy of the high-speed collision on the safety of the battery 10, thereby reducing the probability of the battery 10 catching fire and exploding when the vehicle 1 has a high-speed collision accident, and further optimizing the collision safety performance of the whole vehicle.

[0189] According to some embodiments of the present application, as shown in FIG. 3, FIG. 6 and FIG. 8, the front floor inner longitudinal beam 4122 can be provided as a plurality of front floor inner longitudinal beams 4122, and the plurality of front floor inner longitudinal beams 4122 can be distributed between the left rocker beam 4123 and the right rocker beam 4124 in the transverse direction.

[0190] Wherein, multiple means two or more, such as, in some embodiments, as shown in FIG. 3, FIG. 6 and FIG. 8, the front floor inner longitudinal beams 4122 are provided as three, and the three front floor inner longitudinal beams 4122 are distributed between the left rocker beam 4123 and the right rocker beam 4124 in a transverse direction.

[0191] It should be noted that at least part of the front floor inner longitudinal beams 4122 is connected to the middle region of the front floor cross beam 4121 in the transverse direction; wherein, the middle region refers to the region covered by a certain distance on both sides of the transverse center line of the front floor cross beam 4121, such as the middle region is set as the region covered by 0.5m on both sides of the transverse center line of the front floor cross beam 4121. The chassis 40 provided by the embodiments of the present application, through the structural design that the multiple front floor inner longitudinal beams 4122 are distributed between the left rocker beam 4123 and the right rocker beam 4124 in a transverse direction, based on the front floor inner longitudinal beams 4122 participating in the main force transmission path, the multiple front floor inner longitudinal beams 4122 can provide more support and protection, more effectively transmit and disperse the impact force, and minimize the deformation and damage of the chassis 40, thereby maximizing the integrity and safety of the battery 10.

[0192] The embodiments of the present application will be described in detail from six different implementation angles respectively.

[0193] I. The chassis 40 only includes the elastic energy storage structure 42, and the elastic energy storage structure 42 includes the coil spring 421.

[0194] In this embodiment, the coil spring 421 can be connected to at least one of the front floor cross beam 4121 and the front longitudinal beam.

[0195] II. The chassis 40 only includes the elastic energy storage structure 42, and the elastic energy storage structure 42 includes the steel plate spring 424.

[0196] In this embodiment, the steel plate spring 424 can be connected to any one of the front floor cross beam 4121, the front longitudinal beam and the front bumper beam 4111.

[0197] III. The chassis 40 includes the elastic energy storage structure 42 and the energy absorption structure 43, the elastic energy storage structure 42 includes the coil spring 421, and the coil spring 421 and the energy absorption structure 43 are not used together.

[0198] In this embodiment, the coil spring 421 can be connected to at least one of the front floor cross beam 4121 and the front longitudinal beam.

[0199] IV. The chassis 40 includes the elastic energy storage structure 42 and the energy absorption structure 43, the elastic energy storage structure 42 includes the steel plate spring 424, and the steel plate spring 424 and the energy absorption structure 43 are not used together.

[0200] In this embodiment, the steel plate spring 424 can be connected to any one of the front floor cross beam 4121, the front longitudinal beam and the front bumper beam 4111.

[0201] Five, the chassis 40 comprises the elastic energy storage structure 42 and the energy absorption structure 43, the elastic energy storage structure 42 comprises the coil spring 421, and the coil spring 421 and the energy absorption structure 43 are combined together for use.

[0202] In this embodiment, the rear end of the coil spring 421 is connected to the front end of the energy absorption structure 43, and the coil spring 421 can be connected to the front longitudinal beam.

[0203] Six, the chassis 40 comprises the elastic energy storage structure 42 and the energy absorption structure 43, the elastic energy storage structure 42 comprises the steel plate spring 424, and the steel plate spring 424 and the energy absorption structure 43 are combined together for use.

[0204] In this embodiment, the energy absorption structure 43 is connected between the steel plate spring 424 and the front floor cross beam 4121, and both ends of the steel plate spring 424 can be connected to both ends of the front floor cross beam 4121.

[0205] According to some embodiments of the present application, the present application also provides a vehicle 1, comprising: the chassis 40 as any one of the above.

[0206] The vehicle 1 provided by the embodiments of the present application, through the arrangement of the chassis 40 described above, through the arrangement of the elastic energy storage structure 42 in front of the front floor cross beam 4121 and the energy compartment 4125, the elastic energy storage structure 42 can quickly absorb and disperse the energy generated by the collision at the moment of collision, which helps to reduce the impact force and pressure on the battery 10, reduces the risk of the battery 10 breaking, leaking, even catching fire and exploding, effectively slows down the displacement and deformation of the battery 10, protects the integrity and safety of the battery 10, and maintains the integrity of the vehicle body structure, reduces the deformation and damage of the vehicle 1, thereby improving the reliability of the vehicle 1.

[0207] According to some embodiments of the present application, as shown in FIGS. 2-20, the present application provides a chassis 40, comprising: a chassis body 41 and a resilient energy storage structure 42. The chassis body 41 defines an energy cabin 4125 for accommodating the battery 10, the energy cabin 4125 is longitudinally located behind a front floor cross beam 4121 of the chassis 40; the resilient energy storage structure 42 is mounted to the chassis body 41 and is located in front of the front floor cross beam 4121, and the resilient energy storage structure 42 is configured to be capable of deforming longitudinally. The chassis body 41 comprises a front cabin structure 411 and a front floor structure 412 which are longitudinally distributed and connected, the front floor structure 412 comprises the front floor cross beam 4121 and forms the energy cabin 4125, and the upper surface of the resilient energy storage structure 42 is not higher than the upper surface of the front cabin structure 411. The front floor structure 412 further comprises a front floor inner longitudinal beam 4122, and a left rocker beam 4123 and a right rocker beam 4124 which are arranged in a spaced apart manner in the transverse direction, the front floor cross beam 4121 is connected between the left rocker beam 4123 and the right rocker beam 4124, and the front end of the front floor inner longitudinal beam 4122 is connected to the front floor cross beam 4121. The front floor inner longitudinal beam 4122 is arranged in a plurality of pieces, and the plurality of front floor inner longitudinal beams 4122 are distributed in a spaced apart manner in the transverse direction between the left rocker beam 4123 and the right rocker beam 4124.

[0208] The chassis 40 further comprises: an energy absorption structure 43 mounted to the front end of the front floor cross beam 4121. The resilient energy storage structure 42 is connected to the front end of the energy absorption structure 43. At least part of the energy absorption structure 43 is connected to the middle part of the resilient energy storage structure 42 in the transverse direction. The energy absorption structure 43 is arranged in a plurality of pieces, and the plurality of energy absorption structures 43 are distributed in a spaced apart manner in the transverse direction. The width of the energy absorption structure 43 gradually increases from front to back in the transverse direction. The energy absorption structure 43 has a plurality of cavities 431, and a partition rib 432 is arranged between adjacent two cavities 431, and the cavities 431 extend through the energy absorption structure 43 in the longitudinal direction.

[0209] The assembly mode of the resilient energy storage structure 42 can include:

[0210] Firstly, the front cabin structure 411 comprises a front bumper beam 4111 and a front longitudinal beam connected to both ends of the front bumper beam 4111, the resilient energy storage structure 42 is longitudinally located behind the front bumper beam 4111, and the resilient energy storage structure 42 is connected to at least one of the front floor cross beam 4121 and the front longitudinal beam; in the case that the resilient energy storage structure 42 is connected to the front longitudinal beam, the front longitudinal beam comprises a front longitudinal beam body 4112 and a torsion beam 4113 which are longitudinally distributed and connected, the rear end of the torsion beam 4113 is connected to the front end of the front floor structure 412, and the resilient energy storage structure 42 is connected to the torsion beam 4113.

[0211] Secondly, the rear end of the resilient energy storage structure 42 is connected to the front end of the front bumper beam 4111.

[0212] The elastic energy storage structure 42 can have the following structure forms:

[0213] In one aspect, the elastic energy storage structure 42 comprises a coil spring 421, the front cabin structure 411 defines an opening area 4114 in front of the energy cabin 4125 in the longitudinal direction, and the maximum width of the coil spring 421 in the transverse direction is less than the minimum width of the opening area 4114 in the transverse direction. The elastic energy storage structure 42 further comprises a pressing plate 422 and a supporting plate 423 arranged in the longitudinal direction, the pressing plate 422 and the supporting plate 423 are connected with the coil spring 421, the pressing plate 422 is in front of the supporting plate 423 in the longitudinal direction, the supporting plate 423 is connected with the chassis body 41, and the pressing plate 422 is selectively connected with the chassis body 41.

[0214] In another aspect, the elastic energy storage structure 42 comprises a steel plate spring 424.

[0215] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0216] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A chassis applied to a vehicle, characterized by, include: A chassis body defining an energy compartment for housing a battery, the energy compartment being located longitudinally behind the front floor crossbeam of the chassis body; An elastic energy storage structure is installed on the chassis body and located in front of the front floor crossbeam. The elastic energy storage structure is configured to deform longitudinally.

2. The base pan of claim 1, wherein, The chassis body includes a front cabin structure and a front floor structure that are distributed longitudinally and connected. The front floor structure includes the front floor crossbeam and forms the energy cabin. The upper surface of the elastic energy storage structure is not higher than the upper surface of the front cabin structure.

3. The base pan of claim 2, wherein, The front compartment structure includes a front bumper beam and front longitudinal beams connected to both ends of the front bumper beam, and the elastic energy storage structure is located longitudinally behind the front bumper beam.

4. The base pan of claim 3, wherein, The elastic energy storage structure is connected to at least one of the front floor crossbeam and the front longitudinal beam.

5. The base pan of claim 3, wherein, The front longitudinal beam includes a front longitudinal beam body and a torsion beam that are distributed and connected along the longitudinal direction. The rear end of the torsion beam is connected to the front end of the front floor structure, and the elastic energy storage structure is connected to the torsion beam.

6. The base pan of claim 1, wherein, The chassis body includes a front compartment structure and a front floor structure that are distributed longitudinally and connected together. The front floor structure includes the front floor crossbeam and forms the energy compartment. The front compartment structure includes a front bumper beam and front longitudinal beams connected to both ends of the front bumper beam. The rear end of the elastic energy storage structure is connected to the front end of the front bumper beam.

7. The chassis according to any one of claims 1-6, characterized in that, The elastic energy storage structure includes a helical spring.

8. The base pan of claim 7, wherein, The elastic energy storage structure also includes: A pressure plate and a support plate are arranged longitudinally, both of which are connected to the helical spring. The pressure plate is located in front of the support plate in the longitudinal direction, and the support plate is connected to the chassis body.

9. A chassis according to claim 7 or 8, characterised in that, The chassis body includes a front cabin structure and a front floor structure that are longitudinally distributed and connected. The front floor structure includes the front floor crossbeam and forms the energy cabin. The front cabin structure defines an opening area that is located longitudinally in front of the energy cabin. The maximum width of the helical spring in the lateral direction is less than the minimum width of the opening area in the lateral direction.

10. The chassis of any one of claims 1-6, wherein, The elastic energy storage structure includes a leaf spring.

11. The chassis of any of claims 1-10, wherein, Multiple elastic energy storage structures are provided, and each elastic energy storage structure is installed at a different position on the chassis body.

12. The chassis of any one of claims 1-11, wherein, Also includes: An energy-absorbing structure is installed at the front end of the front floor beam.

13. The base pan of claim 12, wherein, The elastic energy storage structure is connected to the front end of the energy absorption structure.

14. The base pan of claim 13, wherein, At least a portion of the energy-absorbing structure is connected to the middle of the elastic energy storage structure along the transverse direction.

15. The chassis according to any one of claims 12-14, characterized in that, Multiple energy-absorbing structures are provided, and the multiple energy-absorbing structures are distributed at intervals along the lateral direction.

16. The chassis according to any one of claims 12-15, characterized in that The width of the energy-absorbing structure gradually increases from front to back along the lateral direction.

17. The chassis of any of claims 12-16, wherein, The energy-absorbing structure has multiple cavities, with a partition rib between two adjacent cavities, and the cavities extend longitudinally through the energy-absorbing structure.

18. The chassis of any one of claims 1-17, wherein, The chassis body comprises a front cabin structure and a front floor structure which are longitudinally distributed and connected, the front floor structure comprises the front floor cross beam and forms the energy cabin, the front floor structure further comprises a front floor inner longitudinal beam and a left rocker beam and a right rocker beam which are transversely spaced, the front floor cross beam is connected between the left rocker beam and the right rocker beam, and the front end of the front floor inner longitudinal beam is connected to the front floor cross beam.

19. The base pan of claim 18, wherein, The front floor inner longitudinal beam is provided in a plurality, and the plurality of front floor inner longitudinal beams are transversely spaced and distributed between the left rocker beam and the right rocker beam.

20. A vehicle characterized by comprising: The chassis comprises: The chassis according to any one of claims 1-19.

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