CN219600902U - Chassis and vehicle - Google Patents

Abstract

The utility model relates to a chassis and a vehicle, which comprises a lower vehicle body, a battery monomer and a protection plate; the lower vehicle body comprises a floor and a frame, wherein the frame is connected with the floor and is enclosed with the floor to form a containing cavity, and one side of the containing cavity opposite to the floor is provided with an opening; the battery monomer is accommodated in the accommodating cavity; the guard plate is arranged opposite to the floor, and the guard plate is detachably connected to the lower vehicle body and used for covering the opening. The chassis provided by the utility model comprises a lower vehicle body, a battery monomer and a protection plate, wherein the lower vehicle body comprises a floor and a frame, the frame is connected with the floor and is enclosed with the floor to form a containing cavity, one side of the containing cavity opposite to the floor is provided with an opening, and the battery monomer is arranged in the lower vehicle body through the opening so as to realize the integrated assembly of the battery monomer and the lower vehicle body, so that a battery box body can be omitted, and the weight of the chassis is reduced.

Description

Chassis and Vehicles

technical field

This application relates to the technical field of battery production, in particular to chassis and vehicles.

Background technique

With the rapid development of the vehicle industry, vehicles have become important means of travel and transportation, and their power is mainly stored in batteries. However, with the continuous upgrading of vehicle functions and structures, vehicle safety is particularly important.

In the prior art, the battery cells are first installed in the battery box to form a sealed battery pack, and then the battery pack is assembled on the lower vehicle body. However, this method reduces the convenience of battery installation and maintenance.

Utility model content

The present application provides a chassis and a vehicle, aiming at improving the convenience of battery installation and maintenance.

In the first aspect, the present application proposes a chassis, including a lower body, a battery cell, and a protective plate; the lower body includes a floor and a frame, the frame connects the floor and surrounds the floor to form an accommodation cavity, and the side of the accommodation cavity is opposite to the floor It has an opening; the battery unit is accommodated in the accommodating cavity; the protective plate is arranged opposite to the floor, and the protective plate is detachably connected to the lower body and used to cover the opening.

The chassis provided by this application includes a lower body, a battery cell and a protective plate. The lower body includes a floor and a frame. The frame is connected to the floor and enclosed with the floor to form an accommodation cavity. The side of the accommodation cavity opposite to the floor has an opening. The battery cell Installed in the lower body through the opening to realize the integrated assembly of the battery cell and the lower body, which can save the battery box and reduce the weight of the chassis. Moreover, the battery cells are directly installed in the lower vehicle body, which is beneficial to reduce the number of parts of the chassis, thereby saving cost and assembly time. In addition, the protective plate is detachably connected to the lower body. During the installation and maintenance of the battery cell, the battery cell can be installed and removed from the lower body through the opening on the side of the lower body opposite to the floor, thereby reducing the impact on the battery. The impact of other parts on the upper side of the lower body improves the convenience of battery cell installation and maintenance.

According to an embodiment of the present application, the battery cells are fixed to the floor; the protective plate is detachably connected to the frame.

In these optional embodiments, the battery cells are fixed to the floor, and the floor can be used as the cover of the battery cells, which reduces the repeated development of the same functional structure, reduces the development cost of the chassis, and reduces the weight of the chassis. It is also possible to increase the layout space of the battery cells, thereby increasing the energy density of the battery cells, thereby increasing the cruising range of the vehicle.

According to one embodiment of the present application, the floor is connected to the frame by self-piercing riveting or rotary tapping riveting.

In these optional embodiments, the floor and the frame are connected by self-piercing riveting or rotary tapping riveting, so that the joint between the two has high strength and is more secure.

According to an embodiment of the present application, the frame includes two first beams and two first longitudinal beams, the two first beams are arranged at intervals along the first direction, the two first longitudinal beams are arranged at intervals along the second direction, and the first The longitudinal beam connects the two first beams, and the first direction is perpendicular to the second direction.

In these optional embodiments, the configuration is such that the frame structure has high strength and is not easily deformed when subjected to impact force. Moreover, the frame structure can be simplified, and the weight reduction and cost saving of the lower body can be realized.

According to one embodiment of the application, the first longitudinal beam comprises a rocker beam.

In these optional embodiments, it is set so that the frame has a larger space for arranging the battery cells, which can increase the capacity of the battery cells, thereby increasing the cruising range of the vehicle.

According to an embodiment of the present application, the frame further includes a second beam disposed between the two first beams, and the second beam is connected to the two first longitudinal beams.

In these optional embodiments, the structural strength of the frame can be enhanced by arranging the second beam, and the second beam can form different load paths on the frame, thereby further reducing deformation of the frame and improving reliability of the frame. In addition, the second beam can plan the internal space of the frame, improve the rational layout of the battery cells, and improve the space utilization of the chassis.

According to an embodiment of the present application, the frame includes a plurality of second beams, and the plurality of second beams are arranged at intervals along the first direction.

In these optional embodiments, such arrangement can further improve the structural strength of the frame and reduce the deformation of the frame.

According to an embodiment of the present application, the fender is detachably connected to the lower vehicle body through fasteners.

In these optional embodiments, the detachable connection between the fender and the lower body is achieved by fasteners, which not only improves the firm connection between the fender and the lower body, but also facilitates the disconnection of the fender from the lower body for easy replacement. Shields and battery cells.

According to one embodiment of the present application, the fasteners are bolts.

In these optional embodiments, compared with other types of fasteners, the bolt has the advantages of convenient installation and low manufacturing cost.

In a second aspect, the present application proposes a vehicle comprising: according to the aforementioned chassis and upper body, the upper body is detachably connected to the lower body.

The vehicle provided by this application includes a chassis and an upper body. The upper body is detachably connected to the lower body. The integration of the chassis is high, which can reduce research and development costs and shorten the development cycle; A variety of car models.

The above description is only an overview of the technical solution of the present application. In order to better understand the technical means of the present application, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and understandable , the following specifically cites the specific implementation manner of the present application.

Description of drawings

The features, advantages, and technical effects of the exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a chassis provided in some embodiments of the present application;

FIG. 2 is a schematic structural diagram of a chassis frame provided by some embodiments of the present application;

The drawings are not necessarily drawn to scale.

Explanation of reference signs:

100, chassis;

10. Lower body; 11. Accommodating cavity; 12. Opening; 13. Floor; 14. Frame; 141. First beam; 142. First longitudinal beam; 143. Second beam;

20. Battery cell;

30. Protective plate;

40. Fasteners;

First direction x; second direction y.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are the Claim some of the examples, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field of this application; the terms used in this application in the description of the application are only to describe specific implementations The purpose of the example is not intended to limit the present application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and the description of the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the description and claims of the present application or the above drawings are used to distinguish different objects, rather than to describe a specific sequence or primary-subordinate relationship.

Reference in 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 present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the description of this application, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection", "connection" and "attachment" should be understood in a broad sense, for example, it may be a fixed connection, It can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediary, and it can be internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

The term "and/or" in this application is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and A and B exist alone. There are three cases of B. In addition, the character "/" in this application generally indicates that the contextual objects are an "or" relationship.

In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of the various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length and width of the integrated device, are for illustrative purposes only, and should not constitute any limitation to the application .

"Plurality" in this application refers to two or more (including two).

As an important part of the body structure, the chassis first installs the battery cells into the battery box to form a sealed battery pack, and then assembles the battery pack on the lower body, usually installing the battery pack on the upper side of the lower body, and then getting off the vehicle Assemble wiring harnesses, seats and other interior layout parts on the upper side of the body. However, when replacing or maintaining the battery pack, it is necessary to remove the wiring harness, the seat, etc., thereby reducing the convenience of installing and maintaining the battery.

In view of the above problems, the inventor proposed a chassis after in-depth research, including a lower body, a battery cell and a protective plate. The lower body includes a floor and a frame. The opposite side has an opening through which the battery unit is installed in the lower body, so as to realize the integrated assembly of the battery unit and the lower body, which can save the battery box and reduce the weight of the chassis. Moreover, the battery cells are directly installed in the lower vehicle body, which is beneficial to reduce the number of parts of the chassis, thereby saving cost and assembly time. In addition, the protective plate is detachably connected to the lower body. During the installation and maintenance of the battery cell, the battery cell can be installed and removed from the lower body through the opening on the side of the lower body opposite to the floor, thereby reducing the impact on the lower body. The influence of other parts on the upper side of the body improves the convenience of battery cell installation and maintenance.

The chassis can be applied to vehicles, which can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc. The embodiment of the present application does not impose special limitations on the above-mentioned vehicles.

FIG. 1 is a schematic structural diagram of a chassis provided by some embodiments of the present application; FIG. 2 is a schematic structural diagram of a frame of a chassis provided by some embodiments of the present application.

As shown in FIGS. 1 and 2 , a chassis 100 of the present application includes an underbody 10 , a battery unit 20 and a protective plate 30 . The lower vehicle body 10 includes a floor 13 and a frame 14 , the frame 14 connects to the floor 13 and surrounds the floor 13 to form an accommodating chamber 11 , the accommodating chamber 11 has an opening 12 on a side opposite to the floor 13 . The battery cells 20 are housed in the housing chamber 11 . The fender 30 is detachably connected to the lower vehicle body 10 and is used to cover the opening 12 .

The lower body 10 is the main part of the chassis 100. The lower body 10 includes a floor 13 and a frame 14. The frame 14 is connected to the floor 13 and enclosed with the floor 13 to form an accommodating cavity 11. The side of the accommodating cavity 11 opposite to the floor 13 has an opening 12. The battery cells 20 are accommodated in the accommodation cavity 11 through the opening 12 . The battery cells 20 and the lower body 10 are directly assembled in one piece without pre-assembling into a battery pack containing a box, and there is no need to transport the battery pack to the lower body 10 for assembly, thereby effectively reducing transportation costs and secondary assembly links. The battery cell 20 is accommodated in the accommodation cavity 11 and connected to the lower body 10, which can protect the battery cell 20 to a certain extent, and at the same time, the lower body 10 meets the assembly requirements of wiring harnesses, seats and other indoor layout parts.

In the embodiment of the present application, the frame 14 may be formed by connecting multiple beams. The floor 13 can be formed by connecting multiple steel stamping parts or aluminum stamping parts, or the floor 13 can be an integral structure. The floor 13 is disposed on the upper side of the frame 14 , and the floor 13 is connected to the frame 14 and enclosed with the floor 13 to form the accommodating cavity 11 . The floor 13 can not only limit the battery cells 20 to a certain extent, but also protect the battery cells 20 to a certain extent, and at the same time meet the assembly requirements of wiring harnesses, seats and other indoor layout parts.

In the embodiment of the present application, the floor 13 and the frame 14 can also be made of various materials, such as steel, aluminum alloy, or other composite materials. Optionally, one material is a carbon fiber composite material, which has light weight, High strength, strong impact resistance and other advantages.

In the embodiment of the present application, it should be noted that the shape, size and position of the housing cavity 11 can be set according to actual needs, for example, the housing cavity 11 can be a circular cavity, a rectangular cavity or a trapezoidal cavity, etc., It is necessary to satisfy the requirement that the battery cell 20 is stably installed in the accommodation chamber 11 , which is not limited here.

The battery cell 20 may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell. Examples are not limited to this. The battery cell 20 may be in the form of a cylinder, a flat body, a cuboid or other shapes, which is not limited in this embodiment of the present application. The battery cells 20 are generally divided into three types according to the packaging methods: cylindrical battery cells, square square battery cells and pouch battery cells, which are not limited in this embodiment of the present application.

In the embodiment of the present application, the battery cell 20 includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell 20 mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet 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 current collector not coated with the positive electrode active material layer protrudes from the current collector coated with the positive electrode active material layer. The current collector coated with the positive electrode active material layer is stacked as the 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, n-element lithium metal compound (n≥3) or lithium manganate, etc. The negative electrode sheet 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 current collector without the negative electrode active material layer protrudes from the current collector coated with the negative electrode active material layer. The current collector coated with the negative electrode active material layer is stacked as the negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be graphite, metal lithium, silicon, silicon oxide, silicon-carbon alloy, germanium element, germanium oxide, carbon-germanium alloy, tin element, tin oxide or tin-carbon alloy one or more of . The material of the isolation film may be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene). In addition, the electrode assembly may be a wound structure or a laminated structure, which is not limited in the embodiment of the present application.

In the embodiment of the present application, there are one or more battery cells 20 , and the plurality of battery cells 20 are connected in series, in parallel or in parallel to form a whole, and accommodated in the accommodation cavity 11 .

The protective plate 30 is disposed opposite to the floor 13 , that is, the protective plate 30 is disposed on the lower side of the battery unit 20 , is detachably connected to the lower vehicle body 10 and is used to cover the opening 12 . The battery cell 20 is located in the area of the chassis 100, and it is vulnerable to bottom scraping or stone impact during driving, which may further squeeze the battery cell 20; after the battery cell 20 is externally squeezed, its internal structure may appear mechanically lapsed. Short circuit caused by short circuit, etc., which will lead to the safety risk of the battery as a whole. Therefore, a protective plate 30 is provided at the bottom of the battery cell 20 , and the protective plate 30 usually has a certain strength and can protect the battery cell 20 .

In the embodiment of the present application, the floor 13 and the frame 14 are enclosed to form an accommodating cavity 11, the side of the accommodating cavity 11 opposite to the floor 13 has an opening 12, it can be understood that the lower side of the accommodating cavity 11 has an opening 12, and the protective plate 30 can be It is detachably connected to the lower vehicle body 10 and is used to cover the opening 12. Therefore, the battery cell 20 can be accommodated in the accommodation cavity 11 through the opening 12. Compared with the opening 12 on the side of the accommodation cavity opposite to the protective plate 30, it can be understood as accommodating There is an opening 12 on the upper side of the cavity 11 , without disassembling the lower body 10 , thereby reducing the impact on other parts on the upper side of the lower body 10 , and simplifying the installation and removal of the battery cells 20 .

In the embodiment of the present application, the protective plate 30 is detachably connected to the lower vehicle body 10, specifically, the protective plate 30 and the lower vehicle body 10 are connected by riveting, clamping, plugging, bolting, or detachable connection of the connecting piece. a connection.

The chassis 100 provided in this application includes a lower body 10, a battery cell 20, and a fender 30. The lower body 10 includes a floor 13 and a frame 14. The frame 14 is connected to the floor 13 and enclosed with the floor 13 to form an accommodation chamber 11. The accommodation chamber 11 The side opposite to the floor 13 has an opening 12 through which the battery cell 20 is installed in the lower body 10 to realize the integrated assembly of the battery cell 20 and the lower body 10 , which can save the battery box and reduce the weight of the chassis 100. weight. Moreover, the battery cells 20 are directly installed in the lower vehicle body 10, which is beneficial to reduce the number of parts of the chassis 100, thereby saving cost and assembly time. In addition, the fender 30 is detachably connected to the lower body 10, and during the installation and maintenance of the battery cell 20, the battery cell 20 can be connected to the lower body 10 through the opening 12 on the side of the lower body 10 opposite to the floor 13. Installation and disassembly are carried out, thereby reducing the impact on other parts on the upper side of the lower body 10, and improving the installation convenience and maintenance convenience of the battery cell 20.

According to an embodiment of the present application, as shown in FIGS. 1 and 2 , the battery cells 20 are fixed to the floor 13 . The fender 30 is detachably connected to the frame 14 .

In the embodiment of the present application, the battery cell 20 is fixed to the floor 13, and the connection between the battery cell 20 and the floor 13 may be by welding, bonding, riveting, clamping, plugging, bolt connection, or connection with connectors. kind of connection.

In these optional embodiments, the floor 13 can be used as the case cover of the battery cell 20, which reduces the repeated development of the same functional structure, reduces the development cost of the chassis 100, and reduces the weight of the chassis 100, and can also increase The arrangement space of the battery cells 20 can increase the energy density of the battery cells 20, thereby increasing the cruising range of the vehicle.

According to an embodiment of the present application, the floor 13 is connected to the frame 14 by self-piercing riveting or rotary tapping riveting.

In the embodiment of the present application, the method of rotary tapping riveting has the advantages of connecting two different materials without pre-drilling holes, and making the profile/small hole connection possible. The self-piercing riveting method is a mechanical connection, and since there is no heat input, it can effectively reduce the problems caused by thermal connection.

In these optional embodiments, the floor 13 and the frame 14 are connected by self-piercing riveting or rotary tapping riveting, so that the strength of the connection between the two is high and the connection is stronger.

According to an embodiment of the present application, as shown in FIG. 1 and FIG. 2 , the frame 14 includes two first beams 141 and two first longitudinal beams 142, the two first beams 141 are arranged at intervals along the first direction x, and the two first beams 141 are arranged at intervals along the first direction x. The first longitudinal beams 142 are arranged at intervals along the second direction y, the first longitudinal beams 142 connect the two first cross beams 141, and the first direction x is perpendicular to the second direction y.

In the embodiment of the present application, in the case where the two first beams 141 and the two first longitudinal beams 142 are connected, the first beams 141 and the first longitudinal beams 142 can be integrated, and when the frame 14 is manufactured, the The first cross beam 141 and the first longitudinal beam 142 are integrally stamped and formed. Or, the first crossbeam 141 and the first longitudinal beam 142 are split structures, the two first crossbeams 141 and the two first longitudinal beams 142 are made separately, and then the two first crossbeams 141 and the two first longitudinal beams 142 connections.

Exemplarily, the frame 14 is a rectangular structure with a predetermined length and width, that is, the length direction is the first direction x, the width direction is the second direction y, two first beams 141 are arranged at intervals along the length direction, and the two second A longitudinal beam 142 is arranged at intervals along the width direction. The first longitudinal beam 142 connects two first cross beams 141, and the two first cross beams 141 and the two first longitudinal beams 142 enclose to form a hollow structure. The opening and the second opening, the floor 13 is disposed on the upper side of the frame 14 and covers the first opening, and the protective plate 30 is disposed on the lower side of the frame 14 and covers the second opening.

In these optional embodiments, the configuration is such that the frame 14 has high structural strength and is not easily deformed when subjected to impact force. Moreover, the structure of the frame 14 can be simplified, so that the weight and cost of the lower vehicle body 10 can be reduced.

According to one embodiment of the present application, the first longitudinal beam 142 includes a rocker beam.

In the embodiment of the present application, the rocker beam is a component extending along the first direction x relative to the vehicle body, and is connected to the first cross beam 141 . The sill beam is a component that affects the side impact performance of the vehicle. Therefore, the sill beam has strong extrusion resistance and impact resistance. Its material can be aluminum alloy, carbon steel, stainless steel and other materials, preferably aluminum alloy.

In these optional embodiments, it is set so that the frame 14 has a larger space for arranging the battery cells 20 , which can increase the capacity of the battery cells 20 and further increase the cruising range of the vehicle.

According to an embodiment of the present application, as shown in FIGS. 1 and 2 , the frame 14 further includes a second beam 143 disposed between the two first beams 141 , and the second beam 143 is connected to the two first longitudinal beams 142 connect.

In the embodiment of the present application, the frame 14 further includes a second cross beam 143, the second cross beam 143 is arranged between the two first cross beams 141, the second cross beam 143 is connected with the two first longitudinal beams 142, and the second cross beam 143 is connected to the two first longitudinal beams 142 through the second cross beam 143 defines at least two through slots between the first beam 141 and the first longitudinal beam 142 , and the battery is arranged in the through slots.

Exemplarily, the frame 14 includes a second crossbeam 143, the second crossbeam 143 is arranged between the two first crossbeams 141, and the second crossbeam 143 is connected with the two first longitudinal beams 142, and is defined by the second crossbeam 143 Two through grooves, the battery is arranged in the said through grooves.

Exemplarily, the frame 14 includes a plurality of second beams 143, the plurality of second beams 143 are arranged between two first beams 141, and each second beam 143 is connected to two first longitudinal beams 142, and the plurality of second beams 143 The two crossbeams 143 are arranged at intervals along the first direction x, at least two through slots are defined by the second crossbeams 143, and the batteries are arranged in the through slots.

In these optional embodiments, the structural strength of the frame 14 can be enhanced by setting the second beam 143, and the second beam 143 can form different load paths on the frame 14, thereby further reducing the deformation of the frame 14 and improving the strength of the frame 14. reliability. In addition, the second beam 143 can plan the internal space of the frame 14 , can improve the rational layout of the battery cells 20 , and improve the space utilization rate of the chassis 100 .

According to an embodiment of the present application, as shown in FIG. 1 and FIG. 2 , the frame 14 includes a plurality of second beams 143 arranged at intervals along the first direction x.

Exemplarily, the frame 14 includes three second beams 143, the three second beams 143 are arranged between the two first beams 141, and each second beam 143 is connected to the two first longitudinal beams 142, and the three second beams 143 The two beams 143 are arranged at intervals along the first direction x, wherein the two second beams 143 are respectively arranged close to the two first beams 141, and two through slots are defined by the second beams 143, which can be understood as three second beams 143 and the two first longitudinal beams 142 enclose to form two through grooves.

In these optional embodiments, such arrangement can further improve the structural strength of the frame 14 and reduce the deformation of the frame 14 .

According to an embodiment of the present application, as shown in FIG. 1 , the fender 30 is detachably connected to the lower vehicle body 10 through a fastener 40 .

In the embodiment of the present application, the detachable connection between the fender 30 and the lower vehicle body 10 is achieved through fasteners 40 , and the fasteners 40 may be pins, bolts or connectors.

Exemplarily, the fastener 40 is a buckle, and the buckle includes a first buckle and a second buckle, the first buckle is arranged on one of the fender 30 and the lower vehicle body 10, and the other One of them is provided with a second buckle, and the protective plate 30 is buckled connected with the lower vehicle body 10 through the first buckle and the second buckle.

In these optional embodiments, the detachable connection between the protective plate 30 and the lower vehicle body 10 is realized by the fastener 40, which improves the firm connection between the protective plate 30 and the lower vehicle body 10, and facilitates the connection between the protective plate 30 and the lower vehicle body. 10 is disconnected for easy replacement of the protective plate 30 and the battery cell 20 .

According to one embodiment of the present application, the fastener 40 is a bolt.

Specifically, a plurality of screw holes are provided on the protective plate 30, nuts are provided at the positions corresponding to the screw holes of the two first beams 141 and the two first longitudinal beams 142 of the protective plate 30, and the protective plate 30 can be fixed by using bolts. The two first beams 141 and the two first longitudinal beams 142 are disassembled and connected.

Optionally, the bonding surfaces of the protective plate 30 and the two first beams 141 and the two first longitudinal beams 142 are sealed with structural glue.

In these optional embodiments, compared with other types of fasteners 40 , the bolts have the advantages of convenient installation and low manufacturing cost.

In the second aspect, the present application proposes a vehicle comprising the aforementioned chassis 100 and an upper body, the upper body is detachably connected to the lower body 10 .

The vehicle provided by this application includes a chassis 100 and an upper body. The upper body is detachably connected to the lower body 10. The chassis 100 has a high degree of integration, which can reduce research and development costs and shorten the development cycle; the upper body can be replaced according to requirements. In other words, the chassis 100 can be adapted to a variety of models.

According to some embodiments of the present application, referring to FIG. 1 and FIG. 2 , the present application provides a chassis 100 including an underbody 10 , a battery unit 20 and a protective plate 30 . The lower body 10 includes a floor 13 and a frame 14. The frame 14 includes two first beams 141, two first longitudinal beams 142 and three second beams 143. The two first beams 141 are arranged at intervals along the first direction x. Two first longitudinal beams 142 are arranged at intervals along the second direction y, two first longitudinal beams 142 are connected to two first cross beams 141, three second cross beams 143 are arranged between the two first cross beams 141, and each second The beam 143 is connected to the two first longitudinal beams 142, and the three second beams 143 are arranged at intervals along the first direction x, and the first direction x is perpendicular to the second direction y. The floor 13 and the protective plate 30 are arranged on both sides of the frame 14 opposite to each other. The frame 14 is connected to the floor 13 by self-piercing riveting, and is enclosed with the floor 13 to form an accommodating cavity 11 . An opening 12 is formed on a side of the receiving cavity 11 opposite to the floor 13 , and the battery unit 20 is installed in the lower vehicle body 10 through the opening 13 , and the battery unit 20 is fixed on the floor 13 . The protective plate 30 is provided with a plurality of screw holes, the two first beams 141 and the two first longitudinal beams 142 are provided with nuts corresponding to the screw holes of the protective plate 30, and the protective plate 30 is detachably connected to the protective plate 30 by bolts. Two first beams 141 and two first longitudinal beams 142 .

The chassis 100 provided in this application includes a lower body 10, a battery cell 20, and a fender 30. The lower body 10 includes a floor 13 and a frame 14. The frame 14 is connected to the floor 13 and enclosed with the floor 13 to form an accommodation chamber 11. The accommodation chamber 11 The side opposite to the floor 13 has an opening 12 through which the battery cell 20 is installed in the lower body 10 to realize the integrated assembly of the battery cell 20 and the lower body 10 , which can save the battery box and reduce the weight of the chassis 100. weight. Moreover, the battery cells 20 are directly installed in the lower vehicle body 10, which is beneficial to reduce the number of parts of the chassis 100, thereby saving cost and assembly time. In addition, the protective plate 30 is detachably connected to the lower body 10. During the installation and maintenance of the battery cell 20, the battery cell 20 can be installed and removed from the lower body 10 through the opening 12 on the lower side of the lower body 10. Therefore, the influence on other parts on the upper side of the lower vehicle body 10 is reduced, and the installation convenience and maintenance convenience of the battery cell 20 are improved.

While the application has been described with reference to a preferred embodiment, various modifications may be made thereto and equivalents may be substituted for parts thereof without departing from the scope of the application, in particular, as long as there are no structural conflicts , the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (10)

1. A chassis for a vehicle, comprising:

the lower vehicle body comprises a floor and a frame, wherein the frame is connected with the floor and surrounds the floor to form a containing cavity, and an opening is formed in one side of the containing cavity opposite to the floor;

a battery cell accommodated in the accommodation chamber;

and the protection plate is arranged opposite to the floor, is detachably connected with the lower vehicle body and is used for covering the opening.

2. The chassis of claim 1, wherein the chassis is configured to support the chassis,

the battery monomer is fixed on the floor;

the protection plate is detachably connected to the frame.

3. Chassis according to claim 1 or 2, characterized in that,

the floor is connected to the frame by self-piercing riveting or rotary tapping riveting.

4. Chassis according to claim 1 or 2, characterized in that,

the frame comprises two first cross beams and two first longitudinal beams, wherein the two first cross beams are arranged at intervals along a first direction, the two first longitudinal beams are arranged at intervals along a second direction, the two first longitudinal beams are connected with the two first cross beams, and the first direction is perpendicular to the second direction.

5. The chassis of claim 4, wherein the chassis is configured to,

the first longitudinal beam comprises a threshold beam.

6. The chassis of claim 4, wherein the chassis is configured to,

the frame also comprises a second cross beam which is arranged between the two first cross beams and is connected with the two first longitudinal beams.

7. The chassis of claim 6, wherein the chassis is configured to support the chassis,

the frame comprises a plurality of second cross beams, and the second cross beams are arranged at intervals along the first direction.

8. Chassis according to claim 1 or 2, characterized in that,

the protection plate is detachably connected with the lower vehicle body through a fastener.

9. The chassis of claim 8, wherein the chassis is configured to support the chassis,

the fastener is a bolt.

10. A vehicle, characterized by comprising:

the chassis of any one of claims 1 to 9; and

and the upper vehicle body is detachably connected with the lower vehicle body.